WO2020155168A1

WO2020155168A1 - Wireless communication method for unlicensed spectrum, network device and terminal device

Info

Publication number: WO2020155168A1
Application number: PCT/CN2019/074662
Authority: WO
Inventors: 石聪; 吴作敏; 贺传峰
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-02-02
Filing date: 2019-02-02
Publication date: 2020-08-06
Also published as: CN113170324A; CN113170324B

Abstract

Provided in the embodiments of the present application are a wireless communication method for an unlicensed spectrum, a network device and a terminal device, which can realize the transmission of a downlink channel on the unlicensed spectrum and can reduce the processing burden of the network device, thereby reducing the blind detection overhead of the terminal device. The method comprises: executing channel monitoring according to the number of symbols occupied by a first downlink data channel to be transmitted in a time slot; and when it is detected that a channel is idle, sending a first downlink control channel scheduling the first downlink data channel and the first downlink data channel.

Description

Wireless communication method, network equipment and terminal equipment for unlicensed spectrum

Technical field

The embodiments of the present application relate to the field of communication technologies, and specifically relate to a wireless communication method, network equipment, and terminal equipment.

Background technique

Unlicensed spectrum is a spectrum that can be used for radio equipment communications divided by countries and regions. This spectrum is usually considered to be a shared spectrum, that is, communication equipment in different communication systems meets the regulatory requirements set by the country or region on the spectrum, and can use the spectrum. For spectrum, there is no need to apply for a proprietary spectrum authorization from the government.

In terms of unlicensed spectrum communication, how to achieve downlink channel transmission is an urgent problem to be solved.

Summary of the invention

The embodiments of the application provide a wireless communication method, network equipment, and terminal equipment for unlicensed spectrum, which can realize the transmission of downlink channels on the unlicensed spectrum, and can reduce the processing burden of network equipment and reduce the blindness of terminal equipment. Detection overhead.

In a first aspect, a wireless communication method for unlicensed spectrum is provided, including: performing channel monitoring according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot; when the channel is detected to be idle To send the first downlink control channel and the first downlink data channel that schedule the first downlink data channel.

In a second aspect, a wireless communication method for unlicensed spectrum is provided, including: detecting a first downlink control channel in a time slot; wherein, detecting the first downlink control channel in the time slot The position of is determined according to: the number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot; in the case of detecting the first downlink control channel, In the time slot, obtain the first downlink data channel scheduled by the first downlink control channel.

In a third aspect, a wireless communication method for unlicensed spectrum is provided, which includes: based on at least one candidate time domain position configured to a terminal device in a time slot, channel detection is performed sequentially until the channel is detected to be idle; In the case where the channel is detected to be idle at the first candidate time domain position, starting from the first candidate time domain position, the first downlink control channel and the first downlink data channel scheduled by the first downlink control channel are sent.

In a fourth aspect, a wireless communication method for unlicensed spectrum is provided, which includes: sequentially detecting a first downlink control channel at at least one candidate time domain position configured by a network device in a time slot until The first downlink control channel is detected; if the first downlink control channel is detected, the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot .

In a fifth aspect, a network device is provided for executing the method in the first or third aspect.

Specifically, the network device includes a functional module for executing the method in the first or third aspect.

In a sixth aspect, a terminal device is provided for executing the method in the above second or fourth aspect.

Specifically, the terminal device includes a functional module for executing the method in the second or fourth aspect.

In a seventh aspect, a network device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the first or third aspect.

In an eighth aspect, a terminal device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the second or fourth aspect.

In a ninth aspect, a chip is provided for implementing the method in the first or third aspect.

Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the first or third aspect.

In a tenth aspect, a chip is provided for implementing the method in the second or fourth aspect.

Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the second or fourth aspect.

In an eleventh aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the method in the first or third aspect.

In a twelfth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the method in the second or fourth aspect.

In a thirteenth aspect, a computer program product is provided, including computer program instructions that cause a computer to execute the method in the first or third aspect.

In a fourteenth aspect, a computer program product is provided, including computer program instructions, which cause a computer to execute the method in the second or fourth aspect.

In a fifteenth aspect, a computer program is provided, which when running on a computer, causes the computer to execute the method in the first or third aspect.

In a sixteenth aspect, a computer program is provided, which, when run on a computer, causes the computer to execute the method in the second or fourth aspect.

Through the above technical solution, according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot, channel monitoring is performed, and when the channel is detected to be idle, the first downlink data channel for scheduling the first downlink data channel is sent. The control channel and the first downlink data channel can prevent the network equipment from performing channel monitoring operations on all symbols in the time slot, and because the position of the channel monitoring is related to the number of symbols occupied by the transmitted downlink data channel Therefore, it can avoid that the network equipment needs to prepare more downlink data due to the uncertainty of the location where the channel listening is successful, and it can avoid the uncertainty of the location occupied by the first downlink control channel, which requires the terminal device to respond to the The first downlink control channel performs more times of blind detection, thereby reducing the processing burden of the network device and reducing the overhead of the blind detection of the terminal device.

Alternatively, the network device may be configured to blindly detect the candidate time domain position of the downlink control channel, thereby making the blind detection of the downlink control channel more flexible. If more candidate time domain positions are needed, more candidate time domain positions can be configured, which enables the terminal device to blindly detect the downlink control channel at more candidate time domain positions, thereby increasing the probability of channel use.

Description of the drawings

Fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of a partial time slot provided by an embodiment of the present application.

Fig. 3 is a schematic flowchart of a wireless communication method for unlicensed spectrum provided by an embodiment of the present application.

FIG. 4 is a schematic diagram of sending a physical downlink shared channel (PDSCH) on an unlicensed spectrum according to an embodiment of the present application.

Fig. 5 is a schematic diagram of transmitting PDSCH and occupying signals on an unlicensed spectrum provided by an embodiment of the present application.

FIG. 6 is a schematic flowchart of a wireless communication method for unlicensed spectrum provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of candidate time domain positions in a time slot provided by an embodiment of the present application.

FIG. 8 is a schematic diagram of transmitting a PDSCH on an unlicensed spectrum provided by an embodiment of the present application.

FIG. 9 is a schematic diagram of transmitting PDSCH and reference signals on an unlicensed spectrum provided by an embodiment of the present application.

FIG. 10 is a schematic block diagram of a network device provided by an embodiment of the present application.

FIG. 11 is a schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 12 is a schematic block diagram of a communication device provided by an embodiment of the present application.

FIG. 13 is a schematic block diagram of a chip provided by an embodiment of the present application.

FIG. 14 is a schematic block diagram of a communication system provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The technical solutions of the embodiments of this application can be applied to various communication systems, for example: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced long term evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed frequency bands (LTE-based access to unlicensed spectrum, LTE-U) system, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed frequency bands, Universal Mobile Telecommunication System (UMTS), global Worldwide Interoperability for Microwave Access (WiMAX) communication systems, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (MTC), and vehicle to vehicle (V2V) communication, etc. The embodiments of this application can also be applied to these communications system.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or a terminal). The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network side devices in 5G networks, or network devices in the future evolution of Public Land Mobile Network (PLMN), etc.

The communication system 100 further includes at least one terminal device 120 located within the coverage area of the network device 110. The "terminal equipment" used here includes but is not limited to connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device set to receive/send communication signals; and/or Internet of Things (IoT) equipment. A terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellites or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio phone transceivers Electronic device. Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.

Optionally, direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.

Optionally, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Figure 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.

Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.

It should be understood that the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 having a communication function and a terminal device 120. The network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here. The communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities, and other network entities, which are not limited in the embodiment of the present application.

It should be understood that the terms "system" and "network" in this article are often used interchangeably in this article. The term "and/or" in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

The method of the embodiment of the present application can be applied to communication of unlicensed spectrum.

Unlicensed spectrum is the spectrum that can be used for radio equipment communication divided by the country and region. This spectrum can be considered as a shared spectrum, that is, communication devices in different communication systems can meet the regulatory requirements set by the country or region on the spectrum. To use this spectrum, it is not necessary to apply for a proprietary spectrum authorization from the government. In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist friendly on this spectrum, communication devices can follow the principle of Listen Before Talk (LBT) when communicating on unlicensed spectrum, that is, Before the communication device transmits signals on the channel of the unlicensed spectrum, it needs to perform channel detection (or called channel detection). Only when the channel detection result is that the channel is idle (for example, LBT passes or succeeds), the communication device can Signal transmission; if the communication device performs channel sensing on the unlicensed spectrum and the result is that the channel is busy (for example, LBT fails or fails), signal transmission cannot be performed. Optionally, the bandwidth of the LBT is 20 MHz, or an integer multiple of 20 MHz. The maximum channel occupation time (Maximum Channel Occupancy Time, MCOT) can refer to the maximum length of time allowed to use unlicensed spectrum channels for signal transmission after successful LBT. There are different MCOTs under different channel access schemes. The maximum value of MCOT may be 10 ms, for example. It should be understood that the MCOT is the time occupied by signal transmission. Channel Occupancy Time (Channel Occupancy Time, COT) may refer to the length of time for signal transmission using a channel of an unlicensed spectrum after the LBT is successful, and the signal occupation of the channel may be discontinuous within this time length. Wherein, one COT may optionally not exceed, for example, 20 ms at the longest, and the length of time occupied by signal transmission in the COT does not exceed MCOT.

Optionally, in the embodiment of the present application, the working scenario in which NR works on an unlicensed frequency band may include the following working scenarios:

Scenario 1: Carrier aggregation scenario, where, in this scenario, the primary cell (Primary Cell, PCell) works on the licensed spectrum, and the secondary cell (Secondary Cell, SCell) aggregates and works on the unlicensed spectrum through carrier aggregation;

Scenario 2: Dual-connection working scenario, in which, in this scenario, the PCell works on the LTE licensed spectrum, and the primary and secondary cells (Primary Scell, PScell) work on the NR unlicensed spectrum;

Scenario 3, independent work scenario, in which, in this scenario, NR works as an independent cell in unlicensed spectrum

The working frequency band (Band) of NR-U can usually be 5GHz unlicensed spectrum and 6GHz unlicensed spectrum, (for example, 5925-7125MHz in the United States, or 5925-6425MHz in Europe, or part of it); on the unlicensed spectrum, NR can be guaranteed -The fairness between the U system and other systems already working on these unlicensed spectrums, such as wireless fidelity (WiFi), etc. The principle of fairness is that the impact of NR-U on systems that have been deployed on unlicensed spectrum (for example, WiFi) does not exceed the impact between these systems.

In order to ensure fair coexistence between systems on the unlicensed spectrum, energy detection can be used as a basic coexistence mechanism, and the energy detection mechanism can be the aforementioned LBT mechanism.

Since LBT may pass any symbol in a time slot, some time slots may appear (at least when the channel is preempted for the first time). Part of the time slot means that the number of symbols available in the time slot is small. In 14th. Since it takes a certain amount of time for the network equipment to prepare the downlink data, the general network equipment has already prepared the data before LBT. However, because the network device does not know which Orthogonal Frequency Division Multiplexing (OFDM) symbol the channel obtains the channel in, it does not know how many OFDM is available in some time slots when preparing the data. Symbols, so it is often possible to prepare multiple copies of different data to apply different possibilities. In the scenario shown in Figure 2, the worst case for network equipment is to prepare 7 PDSCHs with a length of 2 OFDM symbols. If the channel is obtained at

symbol #

6, 4 data can be transmitted (this It is assumed that the Physical Downlink Control Channel (PDCCH) and the PDSCH are frequency division multiplexed). This method requires the network equipment to prepare more data, and the blind detection overhead of the UE is also relatively large.

Therefore, the embodiments of the present application provide the following methods, which can prevent the network device from preparing more data, reduce the processing burden of the network device, and can reduce the blind detection overhead of the terminal device.

FIG. 3 is a schematic flowchart of a wireless communication method 200 for unlicensed spectrum according to an embodiment of the present application. The method 200 includes at least part of the following content.

In 210, the network device performs channel monitoring according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot.

Optionally, the downlink data channel mentioned in the embodiment of this application may be PDSCH, and the downlink control channel mentioned in the embodiment of this application may be PDSCH.

Optionally, in this embodiment of the present application, the time slot occupied by one downlink data channel is one time slot, that is, one downlink data channel does not cross the time slot.

Optionally, in this embodiment of the present application, the time slot occupied by one downlink control channel is one time slot, that is, one downlink control channel does not cross the time slot.

Optionally, in this embodiment of the present application, the time slot occupied by a downlink control channel and its scheduled downlink data channel is a time slot, that is, a downlink control channel and its scheduled downlink data channel do not cross time slots .

The first downlink data channel in the embodiment of the present application may be prepared in advance, for example, it may be prepared in the process of performing LBT, or prepared before performing LBT.

Specifically, when communicating on unlicensed spectrum, the number of symbols occupied by the downlink data channel can be fixed. Among them, the number of symbols occupied by the downlink data channel can be fixed according to the service currently transmitted by the terminal device, the processing capability of the terminal device, and the current network conditions. Number of symbols.

Optionally, the number of symbols occupied by the downlink data channel may be configured by the network device to the terminal device, for example, it may be configured through RRC signaling, or may also be configured through other signaling.

Optionally, in this embodiment of the present application, the number of symbols occupied by the downlink data channel may be semi-statically configured, that is, may be changed.

Optionally, in the embodiment of the present application, there may be one possibility or more than one possibility for the number of symbols occupied by the downlink data channel.

For example, the number of symbols occupied by the downlink data channel may be 7; for example, the number of symbols occupied by the downlink data channel may be 2, 4 or 7, etc.

Optionally, the allocation method of the downlink data channel in the time domain in the embodiment of the present application may be a type A (typeA) allocation method (also called a scheduling method), or a type B (typeB) allocation method .

Table 1

As shown in Table 1 above, for the normal cyclic prefix (Cyclic Prefix, CP) (Normal CP), the start symbol S of the PDSCH of TypeA can be {0, 1, 2, 3}, and the length L can be {3,..., 14} symbols. For TypeB, the PDSCH start symbol S can be {0,...,12}, and the length L can be {2,4,7}. The PDSCH scheduling mode of TypeA can be understood as a slot-based scheduling mode, because there is only one PDSCH transmission in a slot. The scheduling method of TypeB PDSCH can be understood as a scheduling method based on mini-slots, because there can be multiple PDSCH scheduling in one time slot.

Optionally, when the network device schedules the downlink data transmission of the terminal device, it may carry a Time Domain Resource Allocation (TDRA) field in the Downlink Control Information (DCI), and the TDRA field may be 4 bits can indicate 16 different rows in a resource allocation table, and each row can contain different resource allocation combinations, such as the starting position S of the PDSCH, the length L, and different scheduling types (typeA or typeB).

Optionally, for different purposes of downlink data transmission, the resource allocation table may also be different. For example, for C-RNTI or CS-RNTI data scheduling, this table can be configured by RRC.

Optionally, the terminal device can obtain a PDSCH-TimeDomainResourceAllocation in the table of the RRC configuration according to the indication of the TDRA domain in the DCI, and this information includes K0 (that is, the time slot between the PDCCH and the PDSCH), the mapping type ( That is, TypeA and TypeB mentioned above) and start symbol and length (startSymbolAndLength) (S and L can be calculated based on this parameter, so that the position of PDSCH in the time domain can be known).

Optionally, in this embodiment of the present application, the network device may determine the symbol position for performing the channel monitoring according to the number of symbols occupied by the first downlink data channel; according to the determined symbol position, perform the Channel monitoring.

Optionally, in the embodiment of the present application, when the first downlink data channel and the first downlink control channel for scheduling the first downlink data channel are frequency division multiplexed, it may be based on the occupation of the first downlink data channel. When performing channel monitoring, the number of symbols occupied by the first downlink control channel does not need to be considered (it is assumed that the number of symbols occupied by the first downlink control channel is less than the number of symbols occupied by the first downlink data channel).

For example, suppose the number of symbols occupied by the first downlink data channel is 7, and the index of the symbols in a time slot is from 0 to 13, then if the downlink data channel with the number of symbols of 7 needs to be sent out in a time slot , At least the symbol at index 7 needs to be idle, that is, frame listening needs to be performed before the symbol with index 7, for example, channel listening can be performed in sequence based on symbols #0-7, which is the result of listening It is expected that one of the symbols indexed #0-7 is the start symbol of the idle channel.

Optionally, in this embodiment of the present application, when the first downlink data channel and the first downlink control channel for scheduling the first downlink data channel are time-division multiplexed, it can be based on the occupation of the first downlink data channel. The number of symbols and the number of symbols occupied by the first downlink control channel perform channel sensing.

For example, assuming that the number of symbols occupied by the first downlink data channel is 7, the number of symbols occupied by the first downlink control channel is 2, and the index of the symbols in a slot is 0-13, if it is required to be in a slot If the downlink control channel with the number of symbols of 2 and the downlink data channel with the number of symbols of 7 are sent out, at least the symbol at index 5 must be idle, that is, the listening must be performed before the symbol with index 5, for example , Channel listening can be performed based on symbols #0-5, and the result of the listening is expected to be that one of the symbols indexed 0-5 is the start symbol of the idle channel.

That is to say, in the embodiment of the present application, when performing channel sensing, not only the number of symbols occupied by the first downlink data channel, but also the first downlink control channel of the first downlink data channel may be considered. The number of symbols occupied, and the positional relationship between the first downlink data channel and the first downlink control channel (for example, whether there are symbols between the two), and the multiplexing relationship (for example, frequency division multiplexing or time division multiplexing) Multiplexing) and so on.

Optionally, in this embodiment of the present application, the first downlink data channel may be the first downlink data channel that is sent after the channel detection is successful in the current time slot.

Optionally, in the embodiment of the present application, the network device may expect to send more than one downlink data channel in a time slot after the channel listening is successful (that is, the second mentioned second channel is also sent in the time slot). Downlink data channel), at this time, when performing channel sensing, the number of symbols occupied by the first downlink data channel may be based on, and the number of symbols occupied by the second downlink data channel may be further considered.

For example, taking the above type B scheduling method as an example, the number of symbols that can be occupied by the PDSCH can be 2, 4, and 7, assuming that the network device expects to transmit at least one PDSCH occupying 7 symbols, and the PDSCH and PDCCH can be frequency division multiplexed Yes, you can start sending PDCCH and/or PDSCH at any of

symbols #

0, 3, 5, and 7, so the network equipment expects to detect that the channel is idle in any of

symbols #

0, 3, 5, and 7, therefore, As shown in FIG. 4, the network device can perform channel sensing in sequence based on

symbols #

0, 3, 5, and 7 until it hears that the channel is free.

As shown in Figure 4, assuming that the channel is detected to be idle at symbol #0, two PDSCHs occupying 7 symbols can be sent, and if the channel is detected to be idle at symbol #3, then one can be sent with 7 symbols. PDSCH and a PDSCH occupying 4 symbols. Assuming that the channel is free at symbol #5, you can send a PDSCH occupying 7 symbols and a PDSCH occupying 2 symbols, assuming you listen at symbol #7 When the channel is free, a PDSCH occupying 7 symbols can be sent.

Figure 4 illustrates the frequency division multiplexing of PDSCH and PDCCH as an example. If it is assumed that PDSCH and PDCCH are time-division multiplexed, and the symbols of PDSCH and PDCCH are continuous, the above type B scheduling method is still used as an example. The number of symbols that can be occupied by the PDSCH can be 2, 4, and 7. Assuming that the network device expects to transmit at least one PDSCH occupying 7 symbols, and the PDSCH and PDCCH can be frequency division multiplexed, the symbols can be used in

symbols #

1 and 5. The PDCCH starts to be sent at one point, so the network device expects to detect that the channel is idle at any of the

symbols #

1 and 5. Assuming that the channel is detected to be idle at symbol #0, the PDCCH that occupies 2 symbols for scheduling 7-symbol PDSCH and the PDSCH of 7 symbols can be sent, and the occupancy 2 symbols are sent for scheduling 2 symbols. PDSCH, PDCCH, and 2 symbols PDSCH. Assuming that the channel is heard to be idle at symbol #5, a PDCCH for scheduling a 7-symbol PDSCH and a 7-symbol PDSCH occupying 2 symbols can be transmitted.

Optionally, in the embodiment of the present application, in addition to the position where the network device performs channel sensing based on the number of symbols occupied by the first downlink data channel, etc., it may further determine to perform channel sensing based on the number of symbols remaining in the current time slot. That is, it is necessary to ensure that the remaining number of symbols is sufficient to send a downlink data channel and its corresponding downlink control channel.

For example, if the number of symbols occupied by the first downlink data channel and the first downlink control channel is 7, and the number of symbols currently remaining is 8, it is necessary to perform channel sensing based on symbol 7.

For example, if the number of symbols occupied by the first downlink data channel and the first downlink control channel is 7, and the number of remaining symbols is currently 10, it is necessary to perform channel sensing based on symbol 5 and symbol 7.

Optionally, in the embodiment of the present application, the symbol that the channel is monitored to be idle may be equal to the symbol that the channel is to be monitored to be idle is equal to the start of the symbols of the first downlink control channel and the first downlink data channel. Symbols, where the symbols occupied by the first downlink data channel and the first downlink control channel mentioned here may be the symbols occupied by the two in total, and the first downlink data channel and the first downlink control channel may be frequency division Multiplexing can also be time division multiplexing.

Specifically, taking the example shown in FIG. 4, assuming that any one of the expected

symbols #

0, 3, 5, or 7 is the start symbol in the symbols for transmitting PDCCH and PDSCH, then the

symbol #

0, 3, 5 or 7 is any One can be a symbol where the channel is detected to be free, that is, from any

symbol #

0, 3, 5, or 7, the channel is determined to be free.

Optionally, in the embodiment of the present application, the symbol for which the channel is detected to be idle may be earlier than the start symbol of the symbols for transmitting the first downlink control channel and the first downlink data channel.

For example, as shown in FIG. 5, assuming that the expected symbol #3 is the start symbol in the symbols for transmitting the PDCCH and PDSCH, the symbol where the channel is detected to be idle may be earlier than the symbol #3, for example, the symbol #2.

Optionally, in the embodiment of the present application, in the case where it is detected that the symbol of the channel idle is earlier than the start symbol in the symbols of the first downlink data channel and the first downlink control channel, the network can monitor The idle symbol of the channel starts to the last symbol before the start symbol, and the occupying signal or reference signal is sent.

For example, as shown in FIG. 5, symbol #3 is the starting symbol for transmitting 7 symbols of PDSCH and 4 symbols of PDSCH, and when the channel is detected to be idle at symbol #2, the occupying signal can be sent at symbol 3.

In this case, the location where the channel detection is performed can be made more flexible. Since the channel detection is more flexible, the probability that the network device can seize the channel can be improved.

The reference signal mentioned in the embodiment of the present application may be a demodulation reference signal (De Modulation Reference Signal, DMRS) or a channel state information reference signal (Channel State Information Reference Signal, CSI-RS).

Optionally, in the embodiment of the present application, after the first downlink data channel and the first downlink control channel are transmitted in the time slot, there may be a certain number of symbols remaining, and then the remaining symbols may be transmitted The second downlink control channel and the second downlink data channel, and/or send reference signals and/or occupying signals.

Specifically, the network device may determine the type and number of channels or signals to be transmitted on the remaining symbols and/or the number of symbols occupied according to the number of remaining symbols in the time slot, where the remaining symbols are After sending the remaining symbols of the first downlink control channel and the first downlink data channel in the time slot; perform downlink transmission according to the determined type, number, and/or number of symbols occupied.

In an implementation manner, when the number of remaining symbols is not enough to send another downlink data channel and another downlink control channel, a reference signal or a placeholder signal may be sent.

In another implementation manner, when the number of remaining symbols can send at least one downlink data channel and its corresponding downlink control channel, at least one downlink data channel and its corresponding downlink control channel can be sent.

Optionally, in the embodiment of the present application, the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.

Specifically, if at least one downlink data channel (for example, may include a first downlink data channel, and further include a second downlink data channel) and its corresponding downlink control channel are sent, the remaining symbols in the time slot If the number is not enough to send a complete downlink control channel and its scheduled downlink data channel, the reference signal can be sent.

Optionally, in this embodiment of the present application, the second downlink data channel is the downlink data channel that occupies the largest number of symbols among the downlink data channels that can be sent among the remaining symbols.

Specifically, among the remaining symbols, the downlink data channel with the largest number of symbols is transmitted as much as possible, that is, the PDSCH is transmitted as little as possible.

For example, taking the type B scheduling method as an example, if the channel is obtained at symbol 3, the first 7 symbols are used to transmit the pre-prepared PDSCH and the PDCCH frequency division multiplexed with it, then for the remaining 4 symbols, try to send one occupied Instead of sending two PDSCHs occupying 2 symbols, a 4-symbol PDSCH is not sent, thereby reducing the number of times that the terminal device blindly detects the PDCCH corresponding to the PDSCH.

Optionally, in the embodiment of the present application, in the process of sending the first downlink data channel and the first downlink control channel, a channel or signal to be sent on the remaining symbols is prepared.

For example, the network device may prepare data for the next PDSCH in the process of transmitting the PDSCH occupying 7 symbols. For example, when the channel is obtained at symbol #3, the network device can prepare a PDSCH that occupies 4 symbols when transmitting the PDSCH that occupies 7 symbols.

In 220, when it is detected that the channel is idle, the network device sends the first downlink control channel for scheduling the first downlink data channel and the first downlink data channel.

In 230, the terminal device detects the first downlink control channel in the time slot; wherein the position of the first downlink control channel in the time slot is determined according to at least one of the following: The number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot, and the current number of remaining symbols in the time slot.

Specifically, the terminal device may perform blind detection of the first downlink control channel according to the number of symbols occupied by the first downlink data channel.

For example, assuming that the first downlink data channel is frequency-division multiplexed with the first uplink control channel, and the number of occupied symbols is 7, the terminal device can perform blind detection in sequence at symbols #0-6. And once the PDCCH is detected, the position of the next blind detection is the symbol of the previous PDCCH detected + 7 symbols.

Optionally, similar to the location where the network device performs LBT, the location of the terminal device blindly detecting the PDCCH may also consider at least one of the following:

The number of symbols occupied by the second downlink data channel, the position relationship and/or multiplexing relationship between the downlink data channel and its corresponding downlink control channel, and the number of symbols remaining in the current time slot.

For example, assuming that the first downlink data channel is frequency division multiplexed with the first downlink control channel, and the second downlink data channel is frequency division multiplexed with the second downlink control channel, the number of symbols occupied by the first downlink data channel is 7. The number of symbols occupied by the second downlink data channel is 2 or 7, where the first downlink data channel can be transmitted or not, then the terminal equipment blindly detects the PDCCH positions as symbol #0, symbol #3, symbol #5 and symbol # 7. Once the PDCCH is blindly detected at the above position, the blind detection position of the next PDCCH is at the above position + 7 symbols.

Optionally, in this embodiment of the present application, the terminal device may determine the position for blind detection of the first downlink control channel according to the number of remaining symbols.

For example, if the number of symbols occupied by the first downlink data channel and the first downlink control channel is 7, and the number of remaining symbols is currently 8, blind detection needs to be performed based on symbol 7.

For example, if the number of symbols occupied by the first downlink data channel and the first downlink control channel is 7, and the number of symbols currently remaining is 10, it is necessary to perform blind detection based on symbol 5 and symbol 7.

In the embodiment of the present application, the terminal device may also perform blind detection based on the number of remaining symbols instead of the number occupied by the first downlink data channel.

In 240, when the first downlink control channel is detected, the terminal device acquires the first downlink data channel scheduled by the first downlink control channel in the time slot.

Optionally, in this embodiment of the present application, after acquiring the first downlink control channel and the first downlink data channel, the terminal device detects other channels or channels within the remaining symbols of the time slot. signal.

Optionally, in this embodiment of the present application, the other channels or signals include:

A second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, a reference signal.

Therefore, in this embodiment of the present application, channel monitoring is performed according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot, and when the channel is detected to be idle, the first downlink data channel The first downlink control channel and the first downlink data channel can avoid performing channel monitoring operations on all symbols in the time slot, and the position of the channel monitoring and the number of symbols occupied by the transmitted downlink data channel are Associated, it can avoid the need to prepare more copies of downlink data due to the uncertainty of the location where the channel listening is successful, and can avoid the uncertainty of the location occupied by the first downlink control channel, which requires the terminal device to respond to the The first downlink control channel performs more times of blind detection, thereby reducing the processing burden of the network device and reducing the overhead of the blind detection of the terminal device.

And further, the downlink data channel in the embodiment of the present application may be a downlink data channel based on the type B scheduling mode, and the transmission format of the type B PDSCH may not be modified.

And further, performing channel detection or downlink control channel detection based on the number of symbols occupied by the downlink data channel can eliminate the need to configure the position of the terminal device for blind detection, which can save signaling overhead.

FIG. 6 is a schematic block diagram of a wireless communication method 300 for unlicensed spectrum according to an embodiment of the present application. The method 300 includes at least part of the following content.

In 310, based on at least one candidate time domain position configured to the terminal device in the time slot, channel detection is sequentially performed until the channel is detected to be idle.

Optionally, the candidate time domain position in the embodiment of the present application may be the starting position of the terminal device for blind detection of the downlink control channel, and each candidate time domain position corresponds to one symbol. The candidate time-domain position in the embodiment of the present application may be referred to as the PDCCH blind detection start position.

The network device can configure the terminal device which symbols in the time slot are the symbols for blind detection of the downlink control channel, and the terminal device can perform blind detection on these positions in turn until the PDCCH is detected. Wherein, the network device may configure the at least one candidate time domain position through RRC signaling.

For example, as shown in FIG. 7, the potential starting position of the UE for blind PDCCH detection is configured by the gNB. For example, every two OSs can be used as a potential position for blind PDCCH detection. For example, as shown in Figure 8, the gNB configures 7 potential PDCCH blind detection start positions.

In 320, in the case of detecting that the channel is idle based on the first candidate time domain position, the network device sends the first downlink control channel and the first downlink control channel schedule from the first candidate time domain position The first downlink data channel.

For example, the gNB obtains the channel at any potential PDCCH blind detection start position, and transmits the PDSCH according to the pre-prepared data. For example, as shown in FIG. 8, the gNB preempts the channel at the 4th symbol, and then sends a PDSCH with a length of 7 symbols starting from the 4th symbol, which is a PDSCH prepared in advance.

Optionally, in the embodiment of the present application, when the network device detects that the symbol of the channel idle is earlier than the first candidate time domain position, it starts from the symbol of the detected channel idle to the first candidate time domain. On the last symbol before the position, a placeholder signal or reference signal is sent.

Optionally, in this embodiment of the present application, the network device determines the type and number of channels or signals to be transmitted on the remaining symbols and/or the number of symbols occupied according to the number of remaining symbols in the time slot, Wherein, the remaining symbols are the remaining symbols after transmitting the first downlink control channel and the first downlink data channel in the time slot; according to the determined type, number, and/or number of symbols occupied , For downlink transmission.

Optionally, in this embodiment of the present application, the channel or signal sent on the remaining symbols includes: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, reference signal.

For example, for the remaining symbols, the remaining number of symbols may not be able to transmit any length of PDSCH. In this case, gNB transmits the longest PDSCH that can be supported on the remaining symbols. If there is remaining OS, then Transmit some reference signals, such as DM-RS or CSI-RS.

For example, as shown in FIG. 9, the gNB obtains the channel at the 4th symbol, and transmits a PDSCH with a length of 7 symbols, which is a pre-prepared PDSCH. For the remaining 3 symbols, since typeB PDSCH does not have any length of PDSCH that can be transmitted on the remaining symbols, a PDSCH with a length of 2 symbols can be transmitted. For the remaining symbols, reference signals, such as DMRS or CSI- RS.

In 330, at least one candidate time domain position configured by the network device in the time slot, the detection of the first downlink control channel is sequentially performed until the first downlink control channel is detected.

In 340, in the case where the first downlink control channel is detected, the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot.

Wherein, the other channels or signals optionally include: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or a reference signal.

Therefore, in the embodiment of the present application, the network device performs channel detection in sequence based on at least one candidate time domain position configured to the terminal device in the time slot, until the channel is detected to be idle; when the channel is detected based on the first candidate time domain position When idle, starting from the first candidate time domain position, the first downlink control channel and the first downlink data channel scheduled by the first downlink control channel are sent, so that the network device can be configured for blind The candidate time-domain position of the downlink control channel is detected, thereby making the blind detection of the downlink control channel more flexible. If more candidate time domain positions are needed, more candidate time domain positions can be configured, which enables the terminal device to blindly detect the downlink control channel at more candidate time domain positions, thereby increasing the probability of channel use.

FIG. 10 is a schematic block diagram of a network device 400 for unlicensed spectrum according to an embodiment of the present application. The network device 400 includes a communication unit 410 and optionally a processing unit 420.

The communication unit 410 is configured to: perform channel monitoring according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot; when it is detected that the channel is idle, send the first downlink data channel scheduling A downlink control channel and the first downlink data channel.

Optionally, in the embodiment of the present application, the processing unit 420 is configured to: determine the symbol position for performing the channel monitoring in the time slot according to the number of symbols occupied by the first downlink data channel; The communication unit 410 is further configured to perform the channel monitoring according to the determined symbol position.

Optionally, in this embodiment of the present application, the symbol for which the channel is detected to be idle is equal to the start symbol in the symbols for transmitting the first downlink control channel and the first downlink data channel; or, it is detected that the channel is idle. The symbol of is earlier than the start symbol in the symbols of the first downlink control channel and the first downlink data channel.

Optionally, in the embodiment of the present application, in the case where it is detected that the symbol for which the channel is idle is earlier than the start symbol, the communication unit 410 is further configured to: On the last symbol before the start symbol, a placeholder signal and/or reference signal are sent.

Optionally, in this embodiment of the present application, the processing unit 420 is configured to: determine the type, number, and/or occupancy of channels or signals to be transmitted on the remaining symbols according to the number of remaining symbols in the time slot The remaining symbols are the remaining symbols after sending the first downlink control channel and the first downlink data channel in the time slot; the communication unit 410 is further configured to: determine according to The type, number, and/or number of symbols occupied are used for downlink transmission.

Optionally, in this embodiment of the present application, the channel or signal sent on the remaining symbols includes:

The second downlink control channel and the second downlink data channel scheduled by the second downlink control channel; and/or, a reference signal; and/or, an occupant signal.

Optionally, in the embodiment of the present application, the processing unit 420 is configured to: prepare a channel to be sent on the remaining symbols during the process of sending the first downlink data channel and the first downlink control channel Or signal.

It should be understood that the network device 400 can implement the operations implemented by the network device in the foregoing method 200, and details are not repeated here for brevity.

Optionally, in this embodiment of the present application, the communication unit 410 is configured to: based on at least one candidate time domain position configured to the terminal device in the time slot, perform channel detection in sequence until the channel is detected to be idle; When the time domain position detects that the channel is idle, starting from the first candidate time domain position, the first downlink control channel and the first downlink data channel scheduled by the first downlink control channel are sent.

Optionally, in the embodiment of the present application, in the case where it is detected that the symbol of the channel being idle is earlier than the first candidate time domain position, the communication unit 410 is further configured to: On the last symbol before the first candidate time domain position, a reference signal and/or a placeholder signal is sent.

Optionally, in this embodiment of the present application, the channel or signal sent on the remaining symbols includes: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, reference Signal; and/or occupancy signal.

It should be understood that the network device 400 can implement the operations implemented by the network device in the foregoing method 300, and details are not repeated here for brevity.

FIG. 11 is a schematic block diagram of a terminal device 500 for unlicensed spectrum according to an embodiment of the present application. The terminal device 500 includes a communication unit 510.

Optionally, in this embodiment of the present application, the communication unit 510 is configured to: detect the first downlink control channel in a time slot; wherein, the position of the first downlink control channel in the time slot is Determined according to the following: the number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot; when the first downlink control channel is detected, the In the time slot, the first downlink data channel scheduled by the first downlink control channel is acquired.

Optionally, in the embodiment of the present application, the communication unit 510 is further configured to: after acquiring the first downlink control channel and the first downlink data channel, set the remaining symbols in the time slot Inside, detect other channels or signals.

Optionally, in the embodiment of the present application, the other channels or signals include: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or a reference signal; and/ Or, placeholder signal.

Optionally, in this embodiment of the present application, the second downlink data channel is: among the remaining symbols after the first downlink control channel and the first downlink data channel are sent, the downlink data channel that can be sent The downlink data channel with the largest number of symbols occupied in

It should be understood that the terminal device 500 can implement the corresponding operations implemented by the terminal device in the foregoing method 200, which is not repeated here for brevity.

Optionally, in the embodiment of the present application, the communication unit 510 is configured to: in the time slot at least one candidate time-domain position configured by the network device, perform the detection of the first downlink control channel in sequence until all the positions are detected. The first downlink control channel;

In the case where the first downlink control channel is detected, the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot.

Optionally, in the embodiment of the present application, the communication unit 510 is further configured to:

After acquiring the first downlink control channel and the first downlink data channel, other channels or signals are detected in the remaining symbols of the time slot.

It should be understood that the terminal device 500 can implement the corresponding operations implemented by the terminal device in the above method 300, and for the sake of brevity, details are not described here.

FIG. 12 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 shown in FIG. 12 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 12, the communication device 600 may further include a memory 620. The processor 610 can call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.

The memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.

Optionally, as shown in FIG. 12, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

The transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 600 may specifically be a network device in an embodiment of the present application, and the communication device 600 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here. .

Optionally, the communication device 600 may specifically be a mobile terminal/terminal device of an embodiment of the present application, and the communication device 600 may implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For simplicity , I won’t repeat it here.

FIG. 13 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 700 shown in FIG. 13 includes a processor 710, and the processor 710 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 13, the chip 700 may further include a memory 720. The processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiment of the present application.

The memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.

Optionally, the chip 700 may further include an input interface 730. The processor 710 can control the input interface 730 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 700 may further include an output interface 740. The processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, details are not described herein again.

Optionally, the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For the sake of brevity, here No longer.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-level chips, system-on-chips, system-on-chips, or system-on-chips.

FIG. 14 is a schematic block diagram of a communication system 14 provided by an embodiment of the present application. As shown in FIG. 14, the communication system 800 includes a terminal device 810 and a network device 820.

Wherein, the terminal device 810 can be used to implement the corresponding function implemented by the terminal device in the above method, and the network device 820 can be used to implement the corresponding function implemented by the network device in the above method. For brevity, it will not be repeated here. .

It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be Read-Only Memory (ROM), Programmable Read-Only Memory (Programmable ROM, PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), and Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that the foregoing memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

The embodiments of the present application also provide a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application For the sake of brevity, I won’t repeat it here.

The embodiments of the present application also provide a computer program product, including computer program instructions.

Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Repeat it again.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, For the sake of brevity, I will not repeat them here.

The embodiment of the application also provides a computer program.

Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program is run on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here.

Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer can execute each method in the embodiments of the present application. For the sake of brevity, the corresponding process will not be repeated here.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which is not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A wireless communication method for unlicensed spectrum, characterized in that it includes:

Perform channel monitoring according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot;

When it is detected that the channel is idle, the first downlink control channel for scheduling the first downlink data channel and the first downlink data channel are sent.
The method according to claim 1, wherein the performing channel monitoring according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot comprises:

Determine, according to the number of symbols occupied by the first downlink data channel, a symbol position for performing the channel monitoring in the time slot;

According to the determined symbol position, the channel monitoring is performed.
The method according to claim 1 or 2, wherein the symbol for which the channel is detected to be idle is equal to the start symbol of the symbols for transmitting the first downlink control channel and the first downlink data channel; or,

The symbol for which the channel is detected to be idle is earlier than the start symbol in the symbols for transmitting the first downlink control channel and the first downlink data channel.
The method according to claim 3, characterized in that, in the case where it is detected that the symbol of the channel idle is earlier than the start symbol, the method further comprises:

From the symbol where the channel is detected to be idle to the last symbol before the start symbol, the occupying signal and/or the reference signal are sent.
The method according to any one of claims 1 to 4, wherein the method further comprises:

According to the number of remaining symbols in the time slot, determine the type and number of channels or signals to be transmitted on the remaining symbols, and/or the number of symbols occupied, where the remaining symbols are sent in the time slot Finish the remaining symbols of the first downlink control channel and the first downlink data channel;

Perform downlink transmission according to the determined type, number, and/or number of occupied symbols.
The method according to claim 5, wherein the channel or signal sent on the remaining symbols comprises:

A second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or,

Reference signal; and/or,

Occupation signal.
The method according to claim 6, wherein the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
The method according to claim 6 or 7, wherein the second downlink data channel is the downlink data channel that occupies the largest number of symbols among the downlink data channels that can be sent in the remaining symbols.
The method according to any one of claims 5 to 8, wherein the method further comprises:

In the process of sending the first downlink data channel and the first downlink control channel, a channel or signal to be sent on the remaining symbols is prepared.
A wireless communication method for unlicensed spectrum, characterized in that it includes:

Detecting the first downlink control channel in the time slot;

Wherein, detecting the position of the first downlink control channel in the time slot is determined according to the following: the number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot ；

In the case where the first downlink control channel is detected, the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot.
The method of claim 10, wherein the method further comprises:

After acquiring the first downlink control channel and the first downlink data channel, other channels or signals are detected in the remaining symbols of the time slot.
The method according to claim 11, wherein the other channels or signals comprise:

A second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or,

Reference signal; and/or,

Occupation signal.
The method according to claim 12, wherein the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
The method according to claim 12 or 13, wherein the second downlink data channel is: after sending the first downlink control channel and the first downlink data channel, the remaining symbols can be sent The downlink data channel that occupies the largest number of symbols in the downlink data channel.
A wireless communication method for unlicensed spectrum, characterized in that it includes:

Based on at least one candidate time domain position configured to the terminal device in the time slot, channel detection is performed sequentially until the channel is detected to be idle;

In the case of detecting that the channel is idle based on the first candidate time domain position, starting from the first candidate time domain position, send the first downlink control channel and the first downlink data scheduled by the first downlink control channel channel.
The method according to claim 15, characterized in that, in a case where it is detected that the symbol of the channel idle is earlier than the first candidate time domain position, the method further comprises:

The reference signal and/or the occupying signal are sent from the symbol where the channel is detected to be idle to the last symbol before the first candidate time domain position.
The method according to claim 15 or 16, wherein the method further comprises:

According to the number of remaining symbols in the time slot, determine the type and number of channels or signals to be transmitted on the remaining symbols, and/or the number of symbols occupied, where the remaining symbols are sent in the time slot Finish the remaining symbols of the first downlink control channel and the first downlink data channel;

Perform downlink transmission according to the determined type, number, and/or number of occupied symbols.
The method according to claim 17, wherein the channel or signal sent on the remaining symbols comprises:

A second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or,

Reference signal; and/or

Occupation signal.
The method according to claim 18, wherein the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
The method according to claim 18 or 19, wherein the second downlink data channel is a downlink data channel that occupies the largest number of symbols among the downlink data channels that can be sent in the remaining symbols.
The method according to any one of claims 17 to 20, wherein the method further comprises:

In the process of sending the first downlink data channel and the first downlink control channel, a channel or signal to be sent on the remaining symbols is prepared.
A wireless communication method for unlicensed spectrum, characterized in that it includes:

At least one candidate time domain position configured by the network device in the time slot, sequentially detecting the first downlink control channel until the first downlink control channel is detected;

In the case where the first downlink control channel is detected, the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot.
The method according to claim 22, wherein the method further comprises:

After acquiring the first downlink control channel and the first downlink data channel, other channels or signals are detected in the remaining symbols of the time slot.
The method according to claim 22 or 23, wherein the other channels or signals include:

A second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or,

Reference signal; and/or,

Occupation signal.
The method according to claim 24, wherein the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
The method according to claim 24 or 25, wherein the second downlink data channel is: after sending the first downlink control channel and the first downlink data channel, the remaining symbols can be sent The downlink data channel that occupies the largest number of symbols in the downlink data channel.
A network device used for unlicensed spectrum, which is characterized by comprising a communication unit for:

Perform channel monitoring according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot;

When it is detected that the channel is idle, the first downlink control channel for scheduling the first downlink data channel and the first downlink data channel are sent.
The network device according to claim 27, further comprising a processing unit, configured to:

Determine, according to the number of symbols occupied by the first downlink data channel, a symbol position for performing the channel monitoring in the time slot;

The communication unit is further configured to perform the channel monitoring according to the determined symbol position.
The network device according to claim 27 or 28, wherein the symbol on which the channel is detected to be idle is equal to the start symbol of the symbols for transmitting the first downlink control channel and the first downlink data channel; or ,

The symbol for which the channel is detected to be idle is earlier than the start symbol in the symbols for transmitting the first downlink control channel and the first downlink data channel.
The network device according to claim 29, characterized in that, in a case where it is detected that a symbol of a channel idle is earlier than the start symbol, the communication unit is further configured to:

From the symbol where the channel is detected to be idle to the last symbol before the start symbol, the occupying signal and/or the reference signal are sent.
The network device according to any one of claims 27 to 30, further comprising a processing unit, configured to:

According to the number of remaining symbols in the time slot, determine the type and number of channels or signals to be transmitted on the remaining symbols, and/or the number of symbols occupied, where the remaining symbols are sent in the time slot Finish the remaining symbols of the first downlink control channel and the first downlink data channel;

The communication unit is further configured to perform downlink transmission according to the determined type, number, and/or number of occupied symbols.
The network device according to claim 31, wherein the channel or signal sent on the remaining symbols comprises:

A second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or,

Reference signal; and/or,

Occupation signal.
The network device according to claim 32, wherein the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
The network device according to claim 32 or 33, wherein the second downlink data channel is a downlink data channel that occupies the largest number of symbols among the downlink data channels that can be sent in the remaining symbols.
The network device according to any one of claims 31 to 34, further comprising a processing unit, configured to:

In the process of sending the first downlink data channel and the first downlink control channel, a channel or signal to be sent on the remaining symbols is prepared.
A terminal device for unlicensed spectrum, which is characterized in that it comprises a communication unit for:

Detecting the first downlink control channel in the time slot;

Wherein, detecting the position of the first downlink control channel in the time slot is determined according to the following: the number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot ；

In the case where the first downlink control channel is detected, the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot.
The terminal device according to claim 36, wherein the communication unit is further configured to:

After acquiring the first downlink control channel and the first downlink data channel, other channels or signals are detected in the remaining symbols of the time slot.
The terminal device according to claim 37, wherein the other channels or signals comprise:

A second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or,

Reference signal; and/or,

Occupation signal.
The terminal device according to claim 38, wherein the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
The terminal device according to claim 38 or 39, wherein the second downlink data channel is: among the remaining symbols after sending the first downlink control channel and the first downlink data channel, The downlink data channel that occupies the largest number of symbols in the transmitted downlink data channel.
A network device used for unlicensed spectrum, which is characterized by comprising a communication unit for:

Based on at least one candidate time domain position configured to the terminal device in the time slot, channel detection is performed sequentially until the channel is detected to be idle;

In the case of detecting that the channel is idle based on the first candidate time domain position, starting from the first candidate time domain position, send the first downlink control channel and the first downlink data scheduled by the first downlink control channel channel.
The network device according to claim 41, wherein, in a case where it is detected that a symbol of a channel idle is earlier than the first candidate time domain position, the communication unit is further configured to:

The reference signal and/or the occupying signal are sent from the symbol where the channel is detected to be idle to the last symbol before the first candidate time domain position.
The network device according to claim 41 or 42, further comprising a processing unit, configured to:

According to the number of remaining symbols in the time slot, determine the type and number of channels or signals to be transmitted on the remaining symbols, and/or the number of symbols occupied, where the remaining symbols are sent in the time slot Finish the remaining symbols of the first downlink control channel and the first downlink data channel;

The communication unit is further configured to perform downlink transmission according to the determined type, number, and/or number of occupied symbols.
The network device according to claim 43, wherein the channel or signal sent on the remaining symbols comprises:

A second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or,

Reference signal; and/or

Occupation signal.
The network device according to claim 44, wherein the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
The network device according to claim 44 or 45, wherein the second downlink data channel is a downlink data channel that occupies the largest number of symbols among the downlink data channels that can be sent in the remaining symbols.
The network device according to any one of claims 43 to 46, further comprising a processing unit, configured to:

In the process of sending the first downlink data channel and the first downlink control channel, a channel or signal to be sent on the remaining symbols is prepared.
A terminal device for unlicensed spectrum, which is characterized in that it comprises a communication unit for:

At least one candidate time domain position configured by the network device in the time slot, sequentially detecting the first downlink control channel until the first downlink control channel is detected;

In the case where the first downlink control channel is detected, the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot.
The terminal device according to claim 48, wherein the communication unit is further configured to:

After acquiring the first downlink control channel and the first downlink data channel, other channels or signals are detected in the remaining symbols of the time slot.
The terminal device according to claim 48 or 49, wherein the other channels or signals include:

A second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or,

Reference signal; and/or,

Occupation signal.
The terminal device according to claim 50, wherein the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
The terminal device according to claim 50 or 51, wherein the second downlink data channel is: among the remaining symbols after sending the first downlink control channel and the first downlink data channel, The downlink data channel that occupies the largest number of symbols in the transmitted downlink data channel.
A network device, characterized by comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute as claimed in claims 1 to 9 and 15. To the method of any one of 21.
A terminal device, characterized by comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute as claimed in claims 10 to 14 and 22 To the method of any one of 26.
A chip, characterized by comprising: a processor, used to call and run a computer program from a memory, so that a device installed with the chip can execute the device described in any one of claims 1 to 9 and 15 to 21 method.
A chip, characterized by comprising: a processor, used to call and run a computer program from a memory, so that a device installed with the chip can execute the device described in any one of claims 10 to 14 and 22 to 26 method.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method according to any one of claims 1-9 and 15-21.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method according to any one of claims 10 to 14 and 22 to 26.
A computer program product, characterized by comprising computer program instructions, which cause a computer to execute the method according to any one of claims 1 to 9 and 15 to 21.
A computer program product, characterized by comprising computer program instructions, which cause a computer to execute the method according to any one of claims 10 to 14 and 22 to 26.
A computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 9 and 15 to 21.
A computer program, wherein the computer program causes a computer to execute the method according to any one of claims 10 to 14 and 22 to 26.