CN107888351A

CN107888351A - Reference signal sending method, reference signal processing method and equipment

Info

Publication number: CN107888351A
Application number: CN201610871841.9A
Authority: CN
Inventors: 张旭; 曲秉玉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-09-29
Filing date: 2016-09-29
Publication date: 2018-04-06
Anticipated expiration: 2036-09-29
Also published as: CN107888351B; WO2018059253A1

Abstract

Reference signal sending method, reference signal processing method and equipment provided in an embodiment of the present invention, are related to communication technical field, solve the problems, such as that different service cells have interference when sending reference signal on identical running time-frequency resource in the prior art.This method includes：Emitter is according to the first subcarrier spacing f₁, determine the first subcarrier spacing f₁Corresponding first reference signal sequence；Wherein, the first subcarrier spacing f₁Refer to the frequency interval of two neighboring subcarrier peak value；The emitter uses the first subcarrier spacing f in its serving cell₁First reference signal sequence is sent at least one OFDM symbol, so as to which receiver receiver/transmitter at least one OFDM symbol uses the first subcarrier spacing f in its serving cell₁The first reference signal sequence sent.

Description

Reference signal sending method, reference signal processing method and equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a reference signal sending method, a reference signal processing method, and a device.

Background

The reference signal is used for data demodulation and channel detection, and the design of the reference signal sequence needs to minimize the interference of User Equipment (UE) in different cells sending the reference signal on the same time-frequency resource. Currently, in a Long Term Evolution (LTE) system, a Zadoff-Chu (ZC) sequence is used for an uplink reference signal, and a plurality of ZC sequences are grouped according to cross-correlation between the ZC sequences, so that it is ensured that ZC sequences in a group have high cross-correlation and ZC sequences in other groups have low cross-correlation. The UE of the same cell uses the sequences in the same ZC sequence group, and the UE of different cells uses the sequences in different ZC sequence groups, thereby ensuring that the interference of the UE of different cells for sending reference signals on the same time-frequency resource is very small.

In the grouping of ZC sequences in an LTE system, it is assumed that different cells use the same subcarrier spacing for reference signal transmission, and when UEs in different cells transmit reference signal sequences, occupied time-frequency resources may include multiple resource units, as shown in fig. 1, each resource unit occupies one OFDM symbol in the time domain and one subcarrier in the frequency domain, where the subcarrier spacing is 15 kHz. However, with the rapid development of communication technology, 3GPP has proposed an access network supporting different subcarrier widths, and a cell may change the subcarrier width used by the cell, so that the assumption that different cells use the same subcarrier width is no longer true, which causes cross correlation between reference signal sequences to be destroyed, and further causes interference to reference signals sent by UEs in different cells on the same time-frequency resource, and the access and data transmission performance of the cell is degraded.

Disclosure of Invention

Embodiments of the present invention provide a reference signal sending method, a reference signal processing method, and a device, which solve the problem of interference when different serving cells send reference signals on the same time-frequency resource in the prior art.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a method for transmitting a reference signal is provided, where the method includes: the transmitter is spaced according to the first subcarrier₁Determining a first subcarrier spacing f₁A corresponding first reference signal sequence; wherein the first subcarrier spacing f₁The frequency interval of two adjacent subcarrier peaks is referred to; transmitter uses a first subcarrier spacing f in its serving cell₁The first reference signal sequence is transmitted on at least one OFDM symbol. In the above technical solution, the transmitter may determine the first reference signal sequence according to the used first subcarrier spacing, and the first reference signal sequence has higher correlation with the reference signal sequence in its serving cell and is referred to in other serving cellsThe correlation of the reference signal sequence is low, so that the interference when different server cells use the same time-frequency resource to send the reference signal is avoided.

In one possible implementation, the first reference signal sequence is based on a first subcarrier spacing f₁Extracting a preset generated sequence, wherein the preset generated sequence comprises a Gold sequence or a ZC sequence; or, the first reference signal sequence is determined by a root index Q of a base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier spacing f₁And (4) determining. In the above optional technical solution, the method for determining the first reference signal sequence provided may ensure that the first reference signal sequence determined by the transmitter according to the first subcarrier spacing has higher correlation with the reference signal sequence in the serving cell.

In one possible implementation, if the first subcarrier spacing f₁Spacing f from reference subcarrier₀The relationship of (1) is: f. of₁＝f₀*2ⁿAnd n is an integer greater than or equal to 0, the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein the reference root index q is a root index of a reference base sequence, and the reference base sequence refers to a reference subcarrier spacing f₀A base sequence corresponding to the corresponding reference signal sequence; first subcarrier spacing f₁The corresponding first reference signal sequence is according to the first subcarrier spacing f₁Extracting and obtaining a preset generation sequence, specifically: according to the first subcarrier spacing f₁Spacing f from reference subcarrier₀For a preset generation sequence every 2ⁿExtracting one extraction; wherein, the preset generation sequence is a reference subcarrier interval f₀A corresponding generated sequence of reference signal sequences. In the above optional technical solution, the transmitter may be enabled to transmit the first subcarrier spacing f₁Spacing f from reference subcarrier₀The relation between the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q is determined, so that the preset generated sequence can be generated according to the relation between the root index Q and the reference root index QTo obtain a first reference signal sequence.

In one possible implementation, the transmitter determines a sequence group identity of a reference signal sequence group used by the serving cell; the transmitter determines a reference root index q based on the sequence group identity. In the above optional technical solution, a method for determining a reference root index q is provided.

In one possible implementation, the method further includes: and the transmitter receives the indication information sent by the receiver and determines the reference root index q according to the indication information. In the above optional technical solution, another method for determining the reference root index q is provided.

In one possible implementation, the transmitter spaces f according to the first subcarrier₁And the length M of the first reference signal sequence, and acquiring a root index Q of a base sequence corresponding to the first reference signal sequence from a first corresponding relation corresponding to the sequence group identifier; wherein the first corresponding relationship at least comprises a first subcarrier spacing f₁Length M of the first reference signal sequence, and f₁And a sequence root index corresponding to the M, wherein the sequence root index is the root index of the base sequence corresponding to the first reference signal sequence. In the above optional solution, the transmitter may be according to f from the first corresponding relationship₁And M, acquiring a root index Q of the base sequence corresponding to the first reference signal sequence, so that the first reference signal sequence can be generated according to the acquired root index Q.

In one possible implementation, if the receiver is a base station, the transmitter is spaced according to the first subcarrier spacing f₁Determining a first subcarrier spacing f₁Before the corresponding first reference signal sequence, the method further comprises: a transmitter receives a control signaling or a high-level signaling sent by a base station, wherein the control signaling or the high-level signaling comprises frequency domain resource information of a reference signal sent by the transmitter; the transmitter determines the first subcarrier spacing f according to the frequency domain resource information₁. In the above optional technical solution, the transmitter may determine the first subcarrier spacing f according to a control signaling or a higher layer signaling sent by the base station₁。

In a second aspect, a reference signal processing method is provided, which includes: receiver receiving transmitter on at least one OFDM symbol using a first subcarrier spacing f in its serving cell₁Transmitted first subcarrier spacing f₁A corresponding first reference signal sequence; wherein the first subcarrier spacing f₁Corresponding first reference signal sequence is separated by transmitter according to first subcarrier₁A determination is made. In the above technical solution, the first reference signal sequence has a higher correlation with the reference signal sequence in the serving cell of the transmitter, and has a lower correlation with the reference signal sequences in other serving cells, so that interference when different server cells use the same time-frequency resource to transmit the reference signal can be avoided.

In one possible implementation, the method further includes: the receiver determines a second reference signal sequence and processes the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference signal sequence is according to the first subcarrier spacing f₁And (4) determining. In the above optional technical solution, the receiver is based on the first subcarrier spacing f₁And determining a second reference signal sequence, and processing the first reference signal sequence according to the second reference signal sequence, so that the correctness of the received first reference signal sequence can be ensured.

In one possible implementation, the first reference signal sequence is spaced according to a first subcarrier spacing f₁Extracting a preset generated sequence, wherein the preset generated sequence comprises a Gold sequence or a ZC sequence; or, the first reference signal sequence is determined by a root index Q of a base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier spacing f₁And (4) determining. In the above optional technical solution, the method for determining the first reference signal sequence provided may ensure that the first reference signal sequence determined according to the first subcarrier interval has higher correlation with the reference signal sequence in the serving cell of the transmitter.

In one possible implementation, if the first subcarrier spacing f₁Spacing f from reference subcarrier₀The relationship of (1) is: f. of₁＝f₀*2ⁿAnd n is an integer greater than or equal to 0, the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein the reference root index q is a root index of a reference base sequence, and the reference base sequence refers to a reference subcarrier spacing f₀A base sequence corresponding to the corresponding reference signal sequence; the first reference signal sequence is based on a first subcarrier spacing f₁Extracting and obtaining a preset generation sequence, specifically: according to the first subcarrier spacing f₁Spacing f from reference subcarrier₀For a preset generation sequence every 2ⁿExtracting one extraction; wherein, the preset generation sequence is a reference subcarrier interval f₀A corresponding generated sequence of reference signal sequences. In the above optional technical solution, the first subcarrier spacing f is determined according to₁Spacing f from reference subcarrier₀The relation between the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q is determined, so that the first reference signal sequence can be extracted from the preset generated sequence according to the relation between the root index Q and the reference root index Q.

In one possible implementation, the method further includes: the receiver transmits indication information to the transmitter so that the transmitter determines the reference root index q according to the indication information. In the above optional technical solution, a method for determining a reference root index q is provided.

In one possible implementation, the method further includes: if the receiver is a base station, the method further comprises: the base station sends a control signaling or a high-level signaling to the transmitter, wherein the control signaling or the high-level signaling comprises frequency domain resource information of a reference signal sent by the transmitter, so that the transmitter determines a first subcarrier interval f according to the frequency domain resource information₁. In the above optional technical solution, another method for determining the reference root index q is provided.

In a third aspect,there is provided a transmitter comprising: a determination unit for determining the first subcarrier spacing f₁Determining a first subcarrier spacing f₁A corresponding first reference signal sequence; wherein the first subcarrier spacing f₁The frequency interval of two adjacent subcarrier peaks is referred to; a transmitting unit for using a first subcarrier spacing f in its serving cell₁The first reference signal sequence is transmitted on at least one OFDM symbol.

In one possible implementation, the first reference signal sequence is based on a first subcarrier spacing f₁Extracting a preset generated sequence, wherein the preset generated sequence comprises a Gold sequence or a ZC sequence; or, the first reference signal sequence is determined by a root index Q of a base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier spacing f₁And (4) determining.

In one possible implementation, if the first subcarrier spacing f₁Spacing f from reference subcarrier₀The relationship of (1) is: f. of₁＝f₀*2ⁿAnd n is an integer greater than or equal to 0, the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein the reference root index q is a root index of a reference base sequence, and the reference base sequence refers to a reference subcarrier spacing f₀A base sequence corresponding to the corresponding reference signal sequence; first subcarrier spacing f₁The corresponding first reference signal sequence is according to the first subcarrier spacing f₁Extracting and obtaining a preset generation sequence, specifically: according to the first subcarrier spacing f₁Spacing f from reference subcarrier₀For a preset generation sequence every 2ⁿExtracting one extraction; wherein, the preset generation sequence is a reference subcarrier interval f₀A corresponding generated sequence of reference signal sequences.

In a possible implementation manner, the determining unit is further configured to: determining a sequence group identifier of a reference signal sequence group used by a serving cell; and determining a reference root index q according to the sequence group identification.

In one possible implementation, the transmitter further includes: the receiving unit is used for receiving the indication information sent by the receiver; and the determining unit is further used for determining the reference root index q according to the indication information.

In a possible implementation manner, the determining unit is further configured to determine the first subcarrier spacing f according to the first subcarrier spacing₁And the length M of the first reference signal sequence, and acquiring a root index Q of a base sequence corresponding to the first reference signal sequence from a first corresponding relation corresponding to the sequence group identifier; wherein the first corresponding relationship at least comprises a first subcarrier spacing f₁Length M of the first reference signal sequence, and f₁And a sequence root index corresponding to the M, wherein the sequence root index is the root index of the base sequence corresponding to the first reference signal sequence.

In a possible implementation manner, if the receiver is a base station, the receiving unit is further configured to receive a control signaling or a high-level signaling sent by the base station, where the control signaling or the high-level signaling includes frequency domain resource information of a reference signal sent by the transmitter; a determining unit, further configured to determine the first subcarrier spacing f according to the frequency domain resource information₁。

In a fourth aspect, there is provided a receiver comprising: a receiving unit for receiving on at least one OFDM symbol that the transmitter uses a first subcarrier spacing f in its serving cell₁Transmitted first subcarrier spacing f₁A corresponding first reference signal sequence; wherein the first subcarrier spacing f₁Corresponding first reference signal sequence is separated by transmitter according to first subcarrier₁A determination is made.

In one possible implementation, the receiver further includes: a determining unit, configured to determine a second reference signal sequence, and process the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference signal sequence is according to the first subcarrier spacing f₁And (4) determining.

In one possibilityIn an implementation of (3), the first reference signal sequence is spaced according to a first subcarrier spacing f₁Extracting a preset generated sequence, wherein the preset generated sequence comprises a Gold sequence or a ZC sequence; or, the first reference signal sequence is determined by a root index Q of a base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier spacing f₁And (4) determining.

In one possible implementation, if the first subcarrier spacing f₁Spacing f from reference subcarrier₀The relationship of (1) is: f. of₁＝f₀*2ⁿAnd n is an integer greater than or equal to 0, the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein the reference root index q is a root index of a reference base sequence, and the reference base sequence refers to a reference subcarrier spacing f₀A base sequence corresponding to the corresponding reference signal sequence; the first reference signal sequence is based on a first subcarrier spacing f₁Extracting and obtaining a preset generation sequence, specifically: according to the first subcarrier spacing f₁Spacing f from reference subcarrier₀For a preset generation sequence every 2ⁿExtracting one extraction; wherein, the preset generation sequence is a reference subcarrier interval f₀A corresponding generated sequence of reference signal sequences.

In one possible implementation, the receiver further includes: and a sending unit, configured to send indication information to the transmitter, so that the transmitter determines the reference root index q according to the indication information.

In a possible implementation manner, if the receiver is a base station, the sending unit is further configured to send a control signaling or a higher layer signaling to the transmitter, where the control signaling or the higher layer signaling includes frequency domain resource information of a reference signal sent by the transmitter, so that the transmitter determines the first subcarrier spacing f according to the frequency domain resource information₁。

In a fifth aspect, a transmitter is provided, where the transmitter includes a memory, a processor, a system bus, and a communication interface, the memory stores codes and data, the processor is connected to the memory through the system bus, and the processor runs the codes in the memory to enable the transmitter to perform the reference signal transmission method provided in the first aspect or any one of the possible implementations of the first aspect.

In a sixth aspect, a receiver is provided, where the receiver includes a memory, a processor, a system bus, and a communication interface, the memory stores codes and data, the processor is connected to the memory through the system bus, and the processor executes the codes in the memory to enable the receiver to perform the reference signal processing method provided in any one of the second aspect and the possible implementation manner of the second aspect.

In a seventh aspect, a computer-readable storage medium is provided, where a computer-executable instruction is stored in the computer-readable storage medium, and when at least one processor of an apparatus executes the computer-executable instruction, the apparatus executes the reference signal transmitting method provided in any one of the above-mentioned first aspect or any one of the above-mentioned possible implementations of the first aspect, or executes the reference signal processing method provided in any one of the above-mentioned second aspect or any one of the above-mentioned possible implementations of the second aspect.

In an eighth aspect, a computer program product is provided that includes computer executable instructions stored in a computer readable storage medium; the at least one processor of the device may read the computer-executable instructions from the computer-readable storage medium, and the execution of the computer-executable instructions by the at least one processor causes the device to implement the reference signal transmission method provided in any one of the above-mentioned first aspect or any one of the above-mentioned possible implementations of the first aspect, or to implement the reference signal processing method provided in any one of the above-mentioned second aspect or any one of the above-mentioned possible implementations of the second aspect.

A ninth aspect provides a communication system comprising the transmitter provided in the fifth aspect and the receiver provided in the sixth aspect.

Reference signal sending method and reference signal processing method provided by embodiment of the inventionIn the method and apparatus, the transmitter is configured to transmit data by spacing f according to a first subcarrier₁Determining a first subcarrier spacing f₁Corresponding first reference signal sequence and use of first subcarrier spacing f in its serving cell₁The first reference signal sequence is sent on at least one OFDM symbol, so that a receiver receives the first reference signal sequence on at least one OFDM symbol, the reference signal sequences in the same service cell have higher correlation, the reference signal sequences in different service cells have lower correlation, and the interference of sending reference signals on the same time-frequency resource of different service cells is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a diagram of a time-frequency resource for transmitting a reference signal;

fig. 2 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a baseband subsystem according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

fig. 6 is a flowchart of a reference signal sending method according to an embodiment of the present invention;

FIG. 7 is a diagram of a reference signal sequence according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a time-frequency resource according to an embodiment of the present invention;

fig. 9 is a flowchart of another reference signal transmission method according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a transmitter according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of another transmitter according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of another transmitter according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a receiver according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of another receiver according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of another receiver according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Before describing the present invention, first, terms related to embodiments of the present invention will be briefly described.

The reference signal refers to a signal used for measuring channel quality or for coherent detection and data demodulation of the UE. The reference signal mainly includes: demodulation reference signal (DMRS), channel Sounding Reference Signal (SRS), and Random Access Channel (RACH) preamble.

The reference signal sequence refers to a sequence code used when a reference signal is mapped on a resource element, and the three reference signals DMRS, SRS and RACH preamble signals are generally based on a Zadoff-Chu (ZC) sequence, and are generated and then directly mapped on the resource element without any coding process.

The base sequence refers to a sequence for generating a reference signal sequence, and the reference signal sequence is a sequence generated by phase rotation in the frequency domain performed by the base sequence. For example, a ZC sequence after cyclic expansion may be phase-rotated in the frequency domain to generate a reference signal sequence, and at this time, the ZC sequence after cyclic expansion may be referred to as a base sequence corresponding to the reference signal sequence.

The root index of the base sequence is a root index for generating the base sequence, and when the root index is q1, the generated sequence is called a ZC sequence according to the root index q1 and formula (1) of the ZC sequence, and the root index is the root index of the generated ZC sequence. In the formula, N_ZCM takes a value from 0 to N for the length of the ZC sequence_ZC-1；

The generated sequence refers to a sequence generated by generating a base sequence, and the base sequence is a sequence generated by cyclically extending or truncating the generated sequence, for example, the generated sequence may include a Gold sequence and a ZC sequence. If the generated sequence is a Gold sequence, the reference signal sequence can be generated by a truncation sequence of the Gold sequence; or, the generated sequence is a ZC sequence, the reference signal sequence is generated by cyclically extending the ZC sequence and then adding phase rotation to the extended ZC sequence, and q1 is an index of the ZC sequence.

Fig. 2 is a schematic structural diagram of a communication system to which an embodiment of the present invention is applied, and referring to fig. 2, the communication system includes a base station 101 and a user equipment 102. In the embodiment of the present invention, the transmitter is the user equipment 102, and the receiver is the base station 101; if the transmitter is the base station 101, the receiver is the user equipment 102.

The base station 101 has a scheduling function of sharing a channel, and has a function of establishing scheduling based on a history of packet data transmitted to the ue 102, where scheduling is to have a mechanism to efficiently allocate physical layer resources to obtain statistical multiplexing gain when a plurality of ues 102 share transmission resources. In addition, a plurality of user equipments 102 may be located in the serving cell of the base station 101, wherein the serving cell of the base station 101 may include one or more, for example, as shown in fig. 2, the serving cells of the base station 101 may be two, i.e. cell 1 and cell 2.

The user equipment 102 has a function of transmitting and receiving data through a communication channel 103 established with the base station 101. The user equipment 102 performs transmission or reception processing of the shared channel based on information transmitted through the scheduling control channel. In addition, the user equipments 102 may be mobile stations, mobile phones, computers, portable terminals, and the like, and the types of the user equipments 102 may be the same or different.

The base station 101 and the user equipment 102 perform data reception and transmission via a communication channel, which may be a wireless communication channel, and in the wireless communication channel, there is at least a shared channel that is shared among a plurality of user equipments 102 for transmitting and receiving packets, and a scheduling control channel for transmitting allocation of the shared channel, and a corresponding scheduling result, and the like.

Fig. 3 is a hardware structure diagram of a base station according to an embodiment of the present invention, as shown in fig. 3, the base station includes a baseband subsystem, a middle radio frequency subsystem, an antenna feeder subsystem, and some supporting structures (for example, a complete machine subsystem), where the baseband subsystem is configured to implement operation and maintenance of the entire base station, implement signaling processing, a radio resource principle, a transmission interface to a packet core network, and implement LTE physical layer, media access control layer, L3 signaling, and operation and maintenance main control functions; the middle radio frequency subsystem realizes the conversion among baseband signals, intermediate frequency signals and radio frequency signals, and realizes the demodulation of LTE wireless receiving signals and the modulation and power amplification of transmitting signals; the antenna feeder subsystem comprises an antenna and a feeder which are connected to the base station radio frequency module and an antenna and a feeder of the GRS receiving card and is used for realizing the receiving and sending of wireless air interface signals; the whole subsystem is a supporting part of the baseband subsystem and the intermediate frequency subsystem and provides the functions of structure, power supply and environment monitoring.

The baseband subsystem may be as shown in fig. 4: for example, the mobile phone needs to access the core network through the base station, and then access the internet through the core network, wherein the data of the internet is transmitted to the baseband part through the interface between the core network and the base station, and the baseband part performs PDCP, RLC, MAC layer, coding, modulation, and the like, and then transmits the processed data to the radio frequency part to be transmitted to the user equipment. The baseband and the radio frequency can be connected through a CPRI interface; in addition, the radio frequency part can currently be pulled far through an optical fiber, such as a pulled-far RRU. The various steps of the data transmission method in the embodiment of the present invention are implemented by radio frequency in baseband, while the receiving and sending steps are implemented by an antenna (for example, air interface).

The interface between the user equipment and the base station involved in the implementation of the present invention may be understood as an air interface for communication between the user equipment and the base station, or may also be referred to as a Uu interface.

Fig. 5 is a schematic structural diagram of a user device applied in an embodiment of the present invention, where the user device may be a mobile phone, a tablet computer, a notebook computer, a super mobile personal computer, a netbook, a personal digital assistant, and the like, and the UT is taken as an example to explain the embodiment of the present invention, and fig. 4 is a block diagram illustrating a partial structure of a mobile phone related to each embodiment of the present invention.

As shown in fig. 5, the mobile phone includes: memory, processor, Radio Frequency (RF) circuit, and power supply. Those skilled in the art will appreciate that the handset configuration shown in fig. 5 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following describes each component of the mobile phone in detail with reference to fig. 5:

the memory can be used for storing software programs and modules, and the processor executes various functional applications and data processing of the mobile phone by running the software programs and modules stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the mobile phone, and the like. Further, the memory may include a high-speed random access memory, may also include a nonvolatile memory, and the like.

The processor is a control center of the mobile phone, is connected with each part of the whole mobile phone by various interfaces and lines, and executes various functions and processes data of the mobile phone by running or executing software programs and/or modules stored in the memory and calling the data stored in the memory, thereby carrying out the integral monitoring on the mobile phone. Alternatively, the processor may include one or more processing units; preferably, the processor may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications.

The RF circuit may be used for receiving and transmitting signals during the transmission and reception of information or during a call. Typically, the RF circuitry includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the RF circuitry may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol including, but not limited to, global system for mobile communications, general packet radio service, code division multiple access, wideband code division multiple access, long term evolution, email, short message service, and the like.

The mobile phone also comprises a power supply for supplying power to each part, preferably, the power supply can be logically connected with the processor through a power management system, so that the functions of charging, discharging, power consumption management and the like can be managed through the power management system.

Although not shown, the mobile phone may further include an input unit, a display unit, a sensor module, an audio module, a WiFi module, a bluetooth module, and the like, which are not described herein again.

Fig. 6 is a flowchart illustrating a method for sending a reference signal according to an embodiment of the present invention, and referring to fig. 6, the method includes the following steps.

Step 201: the transmitter is spaced according to the first subcarrier₁Determining a first subcarrier spacing f₁A corresponding first reference signal sequence; wherein the first subcarrier spacing f₁Refers to the frequency separation of two adjacent subcarrier peaks.

Wherein the first reference signal sequence may be according to a first subcarrier spacing f₁Extracting a preset generated sequence, wherein the preset generated sequence comprises a Gold sequence or a ZC sequence; or, the first reference signal sequence is determined by a root index Q of a base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier spacing f₁Determining, wherein the Q is an index of the ZC sequence.

The two methods for determining the first reference signal sequence are described below, specifically as follows.

The first, first reference signal sequence is according to a first subcarrier spacing f₁And extracting a preset generated sequence, wherein the preset generated sequence comprises a Gold sequence or a ZC sequence.

Wherein, when the transmitter is according to the first subcarrier spacing f₁Determining a first subcarrier spacing f₁To a corresponding secondFor a reference signal sequence, the transmitter may first space f according to the first subcarrier₁And determining an extraction interval for extracting the first reference signal sequence from the preset generated sequence, and extracting the preset generated sequence according to the determined extraction interval to obtain the first reference signal sequence.

Optionally, when the transmitter is spaced according to the first subcarrier spacing f₁When determining the extraction interval for extracting the first reference signal sequence from the preset generated sequence, the transmitter may obtain the first subcarrier interval f from the corresponding relationship between the preset subcarrier interval and the extraction interval₁And determining the obtained extraction interval as the extraction interval for extracting the first reference signal sequence from the preset generation sequence.

Or, if there is a reference subcarrier spacing, the first subcarrier spacing f₁Spacing f from reference subcarrier₀The relationship of (1) is: f. of₁＝f₀*2ⁿN is an integer greater than or equal to 0, when the transmitter is spaced according to the first subcarrier₁When determining the extraction interval for extracting the first reference signal sequence from the preset generated sequence, the transmitter may extract the first reference signal sequence according to the first subcarrier spacing f₁Spacing f from reference subcarrier₀A relationship of (2)ⁿDetermining an extraction interval for extracting the first reference signal sequence from the preset generated sequence so as to be every 2 for the preset generated sequenceⁿOne of the first reference signal sequence and the second reference signal sequence is extracted, so that a base sequence of the first reference signal sequence is obtained, and the first reference signal sequence can be generated according to the base sequence of the first reference signal sequence; at this time, the preset generation sequence may be the reference subcarrier spacing f₀A corresponding generated sequence of reference signal sequences.

For example, if the first subcarrier spacing f₁And 30kHz, reference subcarrier spacing f₀At 15kHz, f₁＝f₀*2¹The transmitter is according to f₁And f₀Of a determined decimation interval of f₁/f₀If 2, if f₀Generation sequence of corresponding reference signal sequenceAs shown in fig. 7 (a), specifically zc (0) to zc (10), when the length of the first reference signal sequence is 12, the transmitter extracts every 2 times from the cyclic extended sequences generating the sequences zc0 to zc10 at a predetermined extraction interval, and the resulting base sequences of the first reference signal sequence are shown in fig. 7 (b), specifically zc (0), zc (2), zc (4), zc (6), zc (8), zc (10), zc (1), zc (3), zc (5), zc (7), zc (9), and zc (0). Where zc (1), zc (3), zc (5), zc (7), zc (9), and zc (0) included in the first reference signal sequence base sequence are sequence codes extracted every 2 times after cyclic extension of the generation sequences zc (0) to zc (10).

Note that the first subcarrier spacing f₁Spacing f from reference subcarrier₀The relationship of (1) is: f. of₁＝f₀*2ⁿThen, the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein the reference root index q is a root index of a reference base sequence, and the reference base sequence refers to a reference subcarrier spacing f₀And the base sequence corresponding to the corresponding reference signal sequence.

Second, the first reference signal sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, the root index Q being determined by the first subcarrier spacing f₁And (4) determining. Specifically, the method for the transmitter to determine the first reference signal sequence may include: step a-step c.

Step a: according to the first subcarrier spacing f₁A root index Q of the base sequence corresponding to the first reference signal sequence is determined.

Optionally, when the transmitter is spaced according to the first subcarrier spacing f₁When determining the root index Q of the base sequence corresponding to the first reference signal sequence, the transmitter may space f according to the first subcarrier₁And the length M of the first reference signal sequence, and acquiring a root index Q of a base sequence corresponding to the first reference signal sequence from a first corresponding relation corresponding to the sequence group identifier; wherein the first corresponding relationship at least comprises a first subcarrier spacing f₁Of the first reference signal sequenceLength M, and f₁And a sequence root index corresponding to the M, wherein the sequence root index is the root index of the base sequence corresponding to the first reference signal sequence.

For example, if the first subcarrier spacing f₁30kHz, the length M of the first reference signal sequence is 36, the transmitter spacing f according to the first subcarrier₁30kHz and the length M of the first reference signal sequence is 36, and the root index Q of the base sequence corresponding to the first reference signal sequence is obtained as 4 from the first correspondence relationship corresponding to the sequence group identifier shown in table 1 below.

TABLE 1

Note that, the interval in the first correspondence shown in table 1 refers to a preset subcarrier interval, and the length refers to a length of a preset reference signal sequence, and the first correspondence shown in table 1 is only exemplary, and table 1 does not limit the embodiment of the present invention.

If the first subcarrier spacing f₁Spacing f from reference subcarrier₀The relationship of (1) is: f. of₁＝f₀*2ⁿN is an integer greater than or equal to 0, and the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein the reference root index q is a root index of a reference base sequence, and the reference base sequence refers to a reference subcarrier spacing f₀And the base sequence corresponding to the corresponding reference signal sequence.

Optionally, when the transmitter is spaced according to the first subcarrier spacing f₁When determining the root index Q of the base sequence corresponding to the first reference signal sequence, the transmitter may determine the reference root index Q first and then combine the first subcarrier spacing f₁Spacing f from reference subcarrier₀Determines the root index Q.

When the transmitter determines the reference root index q, the transmitter may determine a sequence group identifier of a reference signal sequence group used by its serving cell, and determine the reference root index q according to the sequence group identifier.

Specifically, the process of determining the sequence group identifier by the transmitter may be: the transmitter receives synchronization information, the synchronization information includes a cell identifier of a serving cell, and the transmitter determines a sequence group identifier according to the cell identifier and a total number of reference signal sequence groups included in the communication system.

For example, if the sequence group is identified as a group number of the sequence group, the transmitter may determine a remainder of the group number of the sequence group with respect to the total number of reference signal sequence groups included in the communication system as a reference root index q.

It should be noted that a communication system may include multiple reference signal sequence sets, and a reference signal sequence set may include multiple reference signal sequences, and the cross-correlation between reference signal sequences in the same group is high, and the cross-correlation between reference signal sequences in different groups is low. For example, in the LTE system, the total number of reference signal sequence groups may be 30.

In addition, when the transmitter determines the reference root index q, the transmitter may also receive indication information transmitted by the receiver and determine the reference root index q according to the indication information.

Specifically, when the transmitter receives the indication information, the transmitter may obtain, according to the received indication information, a preset reference root index corresponding to the indication information from a correspondence between the stored preset indication information and the preset reference root index, and determine the obtained preset reference root index as the reference root index q.

For example, if the indication information received by the transmitter is information 1, and the preset reference root index corresponding to the information 1 is obtained as index 1 from the corresponding relationship between the preset indication information and the preset reference root index shown in the following table 2, the index 1 is determined as the reference root index q.

TABLE 2

Presetting indication information	Preset reference root index
		Information 0	Index 0
Information 1	Index 1
		Information 2	Index 2
……	……

It should be noted that the relationship between the preset indication information and the preset reference root index shown in table 2 is only exemplary, and table 2 does not limit the embodiment of the present invention.

It should be noted that the indication information sent by the receiver may be included in the system information, and the system information may be sent to the transmitter by broadcasting.

Step b: and generating a base sequence corresponding to the first reference signal sequence according to the determined root index Q.

Alternatively, when the transmitter generates the base sequence corresponding to the first reference signal sequence according to the root index Q of the base sequence corresponding to the first reference signal sequence, if the base sequence corresponding to the first reference signal sequence is a ZC sequence, the transmitter may generate the base sequence corresponding to the first reference signal sequenceGenerating a base sequence corresponding to the first reference signal sequence according to the following formula (2) based on the root index Q; in the formula (2), N_ZCIs the length of the ZC sequence, M is the length of the first reference signal sequence, x_q[]Mod is the remainder of the symbols for a ZC sequence corresponding to the reference root index q. Or,

if the base sequence corresponding to the first reference signal sequence is a Gold sequence, the transmitter generates a base sequence corresponding to the first reference signal sequence according to the following formula (3) by using the relation between the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q; in the formula (3), L is the length of Gold sequence, M is the length of the first reference signal sequence, and y [ ] is the initial Gold sequence.

r(i)＝x_q[((2ⁿ)²*i+k)modN_ZC],0≤i＜M,k＝0,1,...,2ⁿ-1 (2)

r(i)＝y([(2ⁿ)²*i+k]modL),0≤i＜M,k＝0,1,...,2ⁿ-1 (3)

It should be noted that, when the first subcarrier spacing f₁Spacing f from reference subcarrier₀And if so, n is equal to 0, and the root index Q of the base sequence corresponding to the first reference signal sequence is also equal to the reference root index Q, so that the base sequence corresponding to the first reference signal sequence generated according to the step b is the base sequence corresponding to the reference signal sequence corresponding to the reference root index Q.

Step c: the transmitter generates a first reference signal sequence according to the base sequence corresponding to the first reference signal sequence.

After the transmitter generates the base sequence corresponding to the first reference signal sequence according to the step b, the transmitter may perform cyclic shift on the generated base sequence, so as to obtain the corresponding first reference signal sequence.

Step 202: transmitter uses a first subcarrier spacing f in its serving cell₁A first reference signal sequence is transmitted to a receiver over at least one OFDM symbol.

Step 203: receiver receiving transmitter on at least one OFDM symbol using a first subcarrier spacing f in its serving cell₁The transmitted first reference signal sequence.

Specifically, when the transmitter determines the first subcarrier spacing f₁After the corresponding first reference signal sequence, the transmitter may use a first subcarrier spacing f at its serving cell₁Transmitting a first reference signal sequence on at least one OFDM symbol such that a receiver may receive a transmitter using a first subcarrier spacing f on at least one OFDM symbol₁The transmitted first reference signal sequence.

Optionally, if the serving cell is configured with at least two subcarrier spacings, for example, the number of the at least two subcarrier spacings is 2, and the at least two subcarrier spacings are respectively the first subcarrier spacing f₁And a second subcarrier spacing f₂The transmitter uses the first subcarrier spacing f₁And/or a second subcarrier spacing f₂Transmitting a reference signal sequence and using a first subcarrier spacing f₁And/or a second subcarrier spacing f₂And if the subcarrier intervals used when the reference signal sequence and the data are transmitted are different, the transmitter may transmit the reference signal sequence and the data by using the corresponding subcarrier intervals in a time division multiplexing manner, specifically, the time domain resource for transmitting the reference signal sequence is different from the time domain resource for transmitting the data.

For example, as shown in FIG. 8, the transmitter uses a first subcarrier spacing f₁Transmitting a reference signal sequence using a second subcarrier spacing f₂Transmit data, and f₂＝2f₁The time-frequency resources used by the transmitter for transmitting the reference signal sequence may be as shown in fig. 8.

In addition, if the serving cell transmits the reference signal sequence using at least two subcarrier intervals, the sequence motif group corresponding to the reference signal sequence group used by the serving cell includes at least the base sequence for one reference signal sequence length.

Step (ii) of204: the receiver determines a second reference signal sequence and processes the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference signal sequence is according to the first subcarrier spacing f₁And (4) determining.

Wherein the receiver is spaced according to the first subcarrier₁Method for determining second reference signal sequence and the method according to the first subcarrier spacing f in step 201₁The methods for determining the first reference signal sequence are consistent, which refer to the description in step 201 above, and the embodiments of the present invention are not described herein again.

After the receiver determines the second reference signal sequence, the receiver may process the received first reference signal sequence according to the second reference signal sequence, where the specific processing procedure is as follows: and carrying out correlation processing on the received first reference signal and a second reference signal sequence determined by the receiver, wherein the processing method is to multiply corresponding elements in each of the two sequences and sum the elements.

It should be noted that, when the reference signal transmission method provided in the embodiment of the present invention is applied between a base station and a user equipment, in the above steps 201 to 204, when the user equipment is used as a transmitter, the base station may be used as a receiver; alternatively, the base station may act as a transmitter when the user equipment acts as a receiver. Of course, in practical applications, the transmitter or the receiver may also be other devices, and this is not particularly limited in the embodiment of the present invention.

Further, when the base station is used as a receiver, referring to fig. 9, before step 201, the method further includes: step 205-step 206.

Step 205: and the base station sends a control signaling or a high-level signaling to the transmitter, wherein the control signaling or the high-level signaling comprises frequency domain resource information of the reference signal sent by the transmitter.

Step 206: when the transmitter receives the control signaling or the higher layer signaling, the transmitter may determine the frequency domain resource information for transmitting the reference signal according to the control signaling or the higher layer signaling.

The frequency domain resource information includes time domain resource information and frequency domain resource information, the time domain resource may be an OFDM symbol, the frequency domain resource may be a subcarrier interval, a number of spaced subcarriers, and the like, where the number of spaced subcarriers refers to the number of subcarriers spaced between adjacent elements when the reference signal sequence is mapped on the frequency domain.

Specifically, after the base station sends the control signaling or the high-level signaling to the transmitter, the transmitter may determine the frequency domain resource information for sending the reference signal according to the received control signaling or the received high-level signaling.

For example, when the transmitter receives the control signaling or the higher layer signaling, the transmitter may determine the first subcarrier spacing f for transmitting the reference signal according to the control signaling or the higher layer signaling₁And at least one OFDM symbol.

In the method for sending reference signals provided by the embodiment of the invention, the transmitter sends the reference signals according to the first subcarrier interval f₁Determining a first subcarrier spacing f₁Corresponding first reference signal sequence and use of first subcarrier spacing f in its serving cell₁The first reference signal sequence is sent on at least one OFDM symbol, so that a receiver receives the first reference signal sequence on at least one OFDM symbol, the reference signal sequences in the same service cell have higher correlation, the reference signal sequences in different service cells have lower correlation, and the interference of sending reference signals on the same time-frequency resource of different service cells is avoided.

The above-mentioned scheme provided by the embodiment of the present invention is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, such as a transmitter, a receiver, etc., for implementing the above-described functions, includes corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software for performing the exemplary network elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments of the present invention, the transmitter, the receiver, and the like may be divided into functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

In the case of dividing the functional modules according to their respective functions, fig. 10 shows a schematic diagram of a possible structure of the transmitter involved in the above embodiment, and the transmitter 300 includes: determining section 301 and transmitting section 302. Wherein, the determining unit 301 is configured to execute the process 201 in fig. 6, and the processes 201 and 206 in fig. 9; the sending unit 302 is configured to execute the process 202 in fig. 6 and 9. Further, the transmitter may further include a receiving unit 303, wherein the receiving unit 303 is configured to receive the control signaling or the higher layer signaling sent by the receiver. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In the case of an integrated unit, fig. 11 shows a schematic diagram of a possible logical structure of the transmitter 310 involved in the above-described embodiment. The transmitter 310 includes: a processing module 312 and a communication module 313. Processing module 312 is used to control and manage the actions of the transmitter, e.g., processing module 312 is used to perform process 201 in fig. 6, as well as processes 201 and 206 in fig. 9, and/or other processes for the techniques described herein. The communication module 313 is used for communication with a receiver. The transmitter 310 may also include a memory module 311 for storing program codes and data for the transmitter.

The processing module 312 may be a processor or controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor and a microprocessor, or the like. The communication module 313 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage module 311 may be a memory.

When the processing module 312 is a processor, the communication module 313 is a communication interface, and the storage module 311 is a memory, the transmitter according to the embodiment of the present invention may be the device shown in fig. 12.

Referring to fig. 12, which is a hardware configuration example of a transmitter, the transmitter 320 includes: a processor 322, a communication interface 323, a memory 321, and a bus 324. Wherein, the communication interface 323, the processor 322 and the memory 321 are connected to each other by a bus 324; the bus 324 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus.

Fig. 13 shows a schematic diagram of a possible structure of the receiver according to the above embodiment, in the case of dividing the functional modules according to the respective functions, and the receiver 400 includes: receiving section 401 and determining section 402. Wherein, the receiving unit 401 is configured to execute the process 203 in fig. 6 and 9; determination unit 402 is used to perform process 204 in fig. 6 and 9. Further, the receiver may further include a sending unit 403, where the sending unit 403 is configured to execute the process 205 of sending control signaling or higher layer signaling to the transmitter in fig. 9. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In the case of an integrated unit, fig. 14 shows a schematic diagram of a possible logical structure of the receiver 410 involved in the above-described embodiment. The receiver 410 includes: a processing module 412 and a communication module 413. Processing module 412 is configured to control and manage the actions of the receiver, e.g., processing module 412 is configured to perform process 204 of fig. 6 and 9, and/or other processes for the techniques described herein. The communication module 413 is used for communication with a receiver. The transmitter 410 may also include a storage module 411 for storing program codes and data for the receiver.

The processing module 412 may be a processor or controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor and a microprocessor, or the like. The communication module 413 may be a transceiver, a transceiving circuit, a communication interface, or the like. The storage module 411 may be a memory.

When the processing module 412 is a processor, the communication module 413 is a communication interface, and the storage module 411 is a memory, the receiver according to the embodiment of the present invention may be the device shown in fig. 15.

Referring to fig. 15, which is a hardware structure example of a receiver, the receiver 420 includes: processor 422, communication interface 423, memory 421, and bus 424. Wherein, the communication interface 423, the processor 422 and the memory 421 are connected to each other by a bus 424; the bus 424 may be a PCI bus or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 15, but this is not intended to represent only one bus or type of bus.

In another embodiment of the present invention, a computer-readable storage medium is further provided, in which computer-executable instructions are stored, and when at least one processor of an apparatus executes the computer-executable instructions, the apparatus performs the steps of the transmitter in the reference signal transmission method provided in fig. 6 or 9 or performs the steps of the receiver in the reference signal transmission method provided in fig. 6 or 9.

In another embodiment of the present invention, there is also provided a computer program product comprising computer executable instructions stored in a computer readable storage medium; the computer executable instructions may be read by at least one processor of the apparatus from a computer readable storage medium, and execution of the computer executable instructions by the at least one processor causes the apparatus to perform the steps of the transmitter in the reference signal transmission method provided in fig. 6 or 9 described above, or to perform the steps of the receiver in the reference signal transmission method provided in fig. 6 or 9 described above.

In another embodiment of the present invention, there is also provided a communication system including the transmitter shown in any one of fig. 10 to 12 described above, and the receiver shown in any one of fig. 13 to 15; wherein, the transmitter is configured to perform the steps of the transmitter in the reference signal transmission method provided in fig. 6 or fig. 9, and the receiver is configured to perform the steps of the transmitter in the reference signal transmission method provided in fig. 6 or fig. 9.

In the communication system provided by the embodiment of the invention, the transmitter is based onA subcarrier spacing f₁Determining a first subcarrier spacing f₁Corresponding first reference signal sequence and use of first subcarrier spacing f in its serving cell₁The first reference signal sequence is sent on at least one OFDM symbol, so that a receiver receives the first reference signal sequence on at least one OFDM symbol, the reference signal sequences in the same service cell have higher correlation, the reference signal sequences in different service cells have lower correlation, and the interference of sending reference signals on the same time-frequency resource of different service cells is avoided.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for transmitting a reference signal, the method comprising:

the transmitter is spaced according to the first subcarrier₁Determining the first subcarrier spacing f₁A corresponding first reference signal sequence; wherein the first subcarrier spacing f₁The frequency interval of two adjacent subcarrier peaks is referred to;

the transmitter uses the first subcarrier spacing f in its serving cell₁Transmitting the first reference signal sequence on at least one OFDM symbol.

2. The method of claim 1,

the first reference signal sequence is according to the first subcarrier spacing f₁Extracting a preset generation sequence; the preset generation sequence comprises a Gold sequence or a ZC sequence; or,

the first reference signal sequence is determined by a root index Q of a base sequence corresponding to the first reference signal sequence, the root index Q being determined by the first subcarrier spacing f₁And (4) determining.

3. The method of claim 2, wherein the first subcarrier spacing f is smaller if the first subcarrier spacing f is smaller than the second subcarrier spacing f₁Spacing f from reference subcarrier₀The relationship of (1) is: f is₁＝f₀*2ⁿAnd if n is an integer greater than or equal to 0, the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein the reference root index q is a root index of a reference base sequence, and the reference base sequence refers to the reference subcarrier spacing f₀A base sequence corresponding to the corresponding reference signal sequence;

the first subcarrier spacing f₁The corresponding first reference signal sequence is according to the first subcarrier spacing f₁Extracting and obtaining a preset generation sequence, specifically: according to the first subcarrier spacing f₁Spacing f from the reference subcarrier₀For the preset generation sequence every 2ⁿExtracting one extraction; wherein the preset generation sequence is the reference subcarrier spacing f₀A corresponding generated sequence of reference signal sequences.

4. The method of claim 3, further comprising:

the transmitter determining a sequence group identity of a reference signal sequence group used by the serving cell;

the transmitter determines the reference root index q according to the sequence group identity.

5. The method of claim 3, further comprising:

and the transmitter receives the indication information sent by the receiver and determines the reference root index q according to the indication information.

6. The method according to any one of claims 3-5, further comprising:

the transmitter spacing f according to the first subcarrier₁And the length M of the first reference signal sequence, and acquiring a root index Q of a base sequence corresponding to the first reference signal sequence from a first corresponding relation corresponding to the sequence group identifier; wherein the first correspondence includes at least the first subcarrier spacing f₁The length M of the first reference signal sequence, and the f₁And a sequence root index corresponding to the M, where the sequence root index is a root index of a base sequence corresponding to the first reference signal sequence.

7. The method according to any of claims 1-6, wherein if the receiver is a base station, the transmitter is based on a first subcarrier spacing f₁Determining the first subcarrier spacing f₁Before the corresponding first reference signal sequence, the method further comprises:

the transmitter receives a control signaling or a high-level signaling sent by the base station, wherein the control signaling or the high-level signaling comprises frequency domain resource information of a reference signal sent by the transmitter;

the transmitter determines the first subcarrier spacing f according to the frequency domain resource information₁。

8. A method of reference signal processing, the method comprising:

receiver receiving transmitter on at least one OFDM symbol using a first subcarrier spacing f in its serving cell₁The first subcarrier spacing f of the transmission₁A corresponding first reference signal sequence;

wherein the first subcarrier spacing f₁Corresponding first reference signal sequence is spaced by the transmitter according to the first subcarrier spacing f₁A determination is made.

9. The method of claim 8, further comprising:

the receiver determines a second reference signal sequence and processes the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference signal sequence is according to the first subcarrier spacing f₁And (4) determining.

10. The method of claim 9,

the first reference signal sequence is spaced according to the first subcarrier spacing f₁Extracting a preset generation sequence; the preset generation sequence comprises a Gold sequence or a ZC sequence; or,

11. The method of claim 10, wherein the first subcarrier spacing f is smaller if the first subcarrier spacing f is smaller than the second subcarrier spacing₁Spacing f from reference subcarrier₀The relationship of (1) is: f is₁＝f₀*2ⁿAnd if n is an integer greater than or equal to 0, the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein the reference root index q is a reference motifA root index of a column, the reference base sequence referring to the reference subcarrier spacing f₀A base sequence corresponding to the corresponding reference signal sequence;

the first reference signal sequence is according to the first subcarrier spacing f₁Extracting and obtaining a preset generation sequence, specifically: according to the first subcarrier spacing f₁Spacing f from the reference subcarrier₀For the preset generation sequence every 2ⁿExtracting one extraction; wherein the preset generation sequence is the reference subcarrier spacing f₀A corresponding generated sequence of reference signal sequences.

12. The method of claim 11, further comprising:

and the receiver sends indication information to the transmitter so that the transmitter determines a reference root index q according to the indication information.

13. The method according to any of claims 8-12, wherein if the receiver is a base station, the method further comprises:

the base station sends a control signaling or a high-level signaling to the transmitter, wherein the control signaling or the high-level signaling comprises frequency domain resource information of a reference signal sent by the transmitter, so that the transmitter determines the first subcarrier interval f according to the frequency domain resource information₁。

14. A transmitter, characterized in that the transmitter comprises:

a determination unit for determining the first subcarrier spacing f₁Determining the first subcarrier spacing f₁A corresponding first reference signal sequence; wherein the first subcarrier spacing f₁The frequency interval of two adjacent subcarrier peaks is referred to;

a transmitting unit for using the first subcarrier spacing f in its serving cell₁Transmitting the first reference signal sequence on at least one OFDM symbol.

15. The transmitter of claim 14,

16. The transmitter of claim 15, wherein if the first subcarrier spacing f is greater than the second subcarrier spacing₁Spacing f from reference subcarrier₀The relationship of (1) is: f is₁＝f₀*2ⁿAnd if n is an integer greater than or equal to 0, the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein the reference root index q is a root index of a reference base sequence, and the reference base sequence refers to the reference subcarrier spacing f₀A base sequence corresponding to the corresponding reference signal sequence;

17. The transmitter of claim 16, wherein the determining unit is further configured to:

determining a sequence group identifier of a reference signal sequence group used by the serving cell;

and determining the reference root index q according to the sequence group identification.

18. The transmitter of claim 16, wherein the transmitter further comprises:

the receiving unit is used for receiving the indication information sent by the receiver;

the determining unit is further configured to determine the reference root index q according to the indication information.

19. The transmitter according to any of claims 16-18, wherein said determining unit is further configured to determine the channel quality of said received signal

According to the first subcarrier spacing f₁And the length M of the first reference signal sequence, and acquiring a root index Q of a base sequence corresponding to the first reference signal sequence from a first corresponding relation corresponding to the sequence group identifier; wherein the first correspondence includes at least the first subcarrier spacing f₁The length M of the first reference signal sequence, and the f₁And a sequence root index corresponding to the M, where the sequence root index is a root index of a base sequence corresponding to the first reference signal sequence.

20. The transmitter according to any of claims 14-19, wherein if the receiver is a base station,

the receiving unit is further configured to receive a control signaling or a high-level signaling sent by the base station, where the control signaling or the high-level signaling includes frequency domain resource information of a reference signal sent by the transmitter;

the determining unit is further configured to determine the first subcarrier spacing f according to the frequency domain resource information₁。

21. A receiver, characterized in that the receiver comprises:

a receiving unit for receiving on at least one OFDM symbol that the transmitter uses a first subcarrier spacing f in its serving cell₁The first subcarrier spacing f of the transmission₁A corresponding first reference signal sequence;

22. The receiver of claim 21, wherein the receiver further comprises:

a determining unit, configured to determine a second reference signal sequence, and process the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference signal sequence is according to the first subcarrier spacing f₁And (4) determining.

23. The receiver of claim 22,

24. The receiver of claim 23, wherein the first subcarrier spacing f is equal to₁Spacing f from reference subcarrier₀The relationship of (1) is: f is₁＝f₀*2ⁿAnd if n is an integer greater than or equal to 0, the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index Q have the following relationship: q ═ Q (2)ⁿ)²(ii) a Wherein,the reference root index q is a root index of a reference base sequence, and the reference base sequence refers to the reference subcarrier spacing f₀A base sequence corresponding to the corresponding reference signal sequence;

25. The receiver of claim 24, wherein the receiver further comprises:

a sending unit, configured to send indication information to the transmitter, so that the transmitter determines the reference root index q according to the indication information.

26. A receiver as claimed in any one of claims 21 to 25, characterized in that, if the receiver is a base station,

the sending unit is further configured to send a control signaling or a high-level signaling to the transmitter, where the control signaling or the high-level signaling includes frequency domain resource information of a reference signal sent by the transmitter, so that the transmitter determines the first subcarrier spacing f according to the frequency domain resource information₁。

27. A transmitter, comprising a memory, a processor, a system bus and a communication interface, wherein the memory stores codes and data, the processor is connected with the memory through the system bus, and the processor executes the codes in the memory to make the transmitter execute the reference signal transmission method according to any one of claims 1 to 7.

28. A receiver comprising a memory, a processor, a system bus and a communication interface, the memory having code and data stored therein, the processor being coupled to the memory via the system bus, the processor executing the code in the memory to cause the receiver to perform the reference signal processing method of any of claims 8-13.

29. A communication system, characterized in that it comprises a transmitter as claimed in claim 27 and a receiver as claimed in claim 28.