CN109802797B - Method and network device for determining granularity of channel state information reference signal - Google Patents
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Abstract
The invention discloses a method and network equipment for determining granularity of a channel state information reference signal, wherein the method comprises the following steps: when the sub-band information reported by the terminal equipment is not detected, the granularity of the CSI-RS is determined in one of a plurality of modes; wherein the plurality of modes include: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity. The method of the embodiment of the invention can ensure that the network equipment can determine the granularity of the CSI-RS when the network equipment does not detect the sub-band information reported by the terminal equipment, thereby successfully sending the CSI-RS to the terminal equipment and facilitating more accurate and efficient communication between the terminal and the network.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and a network device for determining granularity of a channel state information reference signal (CSI-RS).
Background
With the rapid development of communication technology, more and more new technologies are emerging in the field of communications. In the fifth generation mobile communication system, especially in the discussion of the New Radio (NR) standard, the granularity N refers to the number of Resource Blocks (RBs) of a Channel State information Reference Signal (CSI-RS) that are consecutive in the frequency domain. Generally, if the network device configures a mapping relationship between a carrier bandwidth part and a subband size, a granularity N of the CSI-RS may be equal to the subband size, and a terminal device (UE) may report CSI according to the subband size configured by the network device.
However, when the CSI-RS is used for beam management or non-subband reporting, and the like, if the network device does not configure the subband size, the network device may not determine the granularity of the CSI-RS, so that the network device may not accurately send the CSI-RS to the terminal device.
Disclosure of Invention
The embodiment of the invention provides a method for determining granularity of a channel state information reference signal and network equipment, and aims to solve the problem that the granularity of a CSI-RS (channel state information reference signal) cannot be accurately sent to terminal equipment because the network equipment cannot determine the granularity of the CSI-RS under the condition that the CSI-RS is used for beam management or non-subband reporting and the like and the network equipment does not configure the size of a subband, or the problem that the CSI-RS cannot be accurately sent to the terminal equipment because the network equipment cannot autonomously determine the granularity of the CSI-RS.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, a method for determining granularity of a channel state information reference signal is provided, where the method is applied to a network device, and the method includes:
when the sub-band information reported by the terminal equipment is not detected, the granularity of the CSI-RS is determined in one of a plurality of modes;
wherein the plurality of modes include: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity.
In a second aspect, a network device is provided, the network device comprising:
the detection module is used for detecting the sub-band information reported by the terminal equipment;
the determining module is used for determining the granularity of the CSI-RS in one of a plurality of modes when the detecting module does not detect the sub-band information reported by the terminal equipment;
wherein the plurality of modes include: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity.
In a third aspect, a network device is provided, which comprises a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for determining the granularity of channel state information reference signals according to the first aspect.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of determining granularity of channel state information reference signals according to the first aspect.
In a fifth aspect, a method for determining granularity of CSI-RS is provided, where the method is applied to a network device, and the method includes:
detecting sub-band information reported by terminal equipment;
determining granularity of channel state information reference information (CSI-RS) through one of a plurality of ways, wherein the plurality of ways comprise: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity.
In the embodiment of the invention, when the sub-band information reported by the terminal equipment is not detected, the granularity of the CSI-RS is determined in one of a plurality of modes, so that the granularity of the CSI-RS can be determined by the network equipment when the sub-band information reported by the terminal equipment is not detected, the CSI-RS is successfully sent to the terminal equipment, and the terminal and the network can communicate more accurately and efficiently. Or the network equipment can not autonomously determine the granularity of the CSI-RS, so that the CSI-RS can be more accurately sent to the terminal equipment, and more accurate communication between the terminal and the network is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow chart of a method of determining channel state information reference signal granularity according to an embodiment of the present invention.
Fig. 2 is an example of the preset granularity determined as the granularity of the CSI-RS according to an embodiment of the present invention.
Fig. 3 is another example of the preset granularity determined as the granularity of the CSI-RS according to an embodiment of the present invention.
Fig. 4 is an example of selecting granularity of CSI-RS from the candidate granularities for one embodiment of the invention.
Fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a network device according to another 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 some, not all, embodiments of the present invention. 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.
The technical scheme of the invention can be applied to various communication systems, such as: a Global System for Mobile communication (GSM), a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS) System, a Long Term Evolution (Long Term Evolution, LTE)/enhanced Long Term Evolution (Long Term Evolution-advanced, LTE-a) System, a New air interface (New Radio, NR) System, etc., and then, those skilled in the art will understand that the embodiments of the present invention are not limited to the application of the above communication System.
A Terminal device (UE), which may also be referred to as a Mobile Terminal (Mobile Terminal), a Mobile User Equipment (UE), or the like, may communicate with one or more Core Networks (CN) via a Radio Access Network (e.g., Radio Access Network, RAN), and the User Equipment may be a Mobile Terminal, such as a Mobile phone (or referred to as a "cellular" phone) and a computer having a Mobile Terminal, such as a portable, pocket, handheld, computer-included, or vehicle-mounted Mobile device, and may exchange languages and/or data with the Radio Access Network.
The Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB or e-NodeB) and a 5G Base Station (gNB) in LTE, and a Base Station of a subsequent evolved version.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1 illustrates a method of determining granularity of a channel state information reference signal according to one embodiment of the present invention. As shown in fig. 1, the method 100 is applied to a network device, such as a gNB, and includes:
s110, when the sub-band information reported by the terminal equipment is not detected, the granularity of the CSI-RS is determined in one of a plurality of modes. In step S110, the sub-band information reported by the terminal is not detected, which includes the sub-band information not reported by the terminal, or the sub-band information reported by the terminal is not decoded correctly by the network side. Those skilled in the art will appreciate that the "sub-band information reported by undetected terminal equipment" is not limiting.
In S110, the multiple ways include: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity.
Optionally, in some embodiments, the preset granularity is a default value. Further, in one embodiment, the default value may be set to 4, which may be independent of the subband size (subband size) actually used by the terminal, and in one example, as shown in fig. 2, the CSI-RS occupies 4 consecutive RBs in the frequency domain. However, this is not a limitation to the embodiment of the present application, and the network side device may apply other default values, for example, 2 or 8, according to the application scenario.
Optionally, in other embodiments, the default value is set to 1, and the granularity of the CSI-RS is 1 RB consecutively. In this case, RBs occupied by CSI-RSs may be adjacent to each other in the frequency domain, may not be adjacent, or may be adjacent to some RBs and other RBs, in other words, in the case that the default value is 1, the distribution of CSI-RSs may be continuous, discrete, or distributed (distributed) in the frequency domain. For example, as shown in fig. 3, the granularity of the CSI-RS is 1, and a portion of RBs occupied in the frequency domain are adjacent, and the portion of adjacent RBs is not adjacent to another portion of adjacent RBs. As in the method shown in fig. 3, it can be considered that the network device can transmit CSI-RS on all RBs that are not occupied in the frequency domain.
Optionally, in some embodiments, the candidate granularity is at least one subband size corresponding to the current carrier bandwidth part. Wherein, selecting the granularity of the CSI-RS from the candidate granularities may include: the granularity of the CSI-RS is selected from at least one subband size corresponding to the current carrier bandwidth part, and in particular, in some embodiments, the granularity of the CSI-RS is selected from at least one subband size corresponding to the current carrier bandwidth part, and the at least one subband size corresponding to the current carrier bandwidth part is determined according to the current carrier bandwidth part and a corresponding relationship between the carrier bandwidth part and the subband size. Specifically, in some embodiments, selecting the granularity of the CSI-RS in at least one subband size corresponding to the current carrier bandwidth part further includes selecting one of a maximum value of the subband sizes, a minimum value of the subband sizes, or randomly selecting the one of the maximum value and the minimum value.
For example, in the case where carrier bandwidth parts (carrier bandwidth parts) correspond to different numbers of PRBs, the number of PRBs of the subband size may have a minimum value and/or a maximum value. For example, when the carrier bandwidth portion is 24-60, the subband size may be 6 or 12, so where 6 may be set to the minimum in this case and 12 to the maximum in this case, then the candidate granularity may be 6 and 12, then the network device may select the minimum 6 from the maximum, the minimum, or the maximum 12, or randomly select one from the minimum and the maximum.
In other words, assuming that there are two corresponding sub-band sizes when the number of RBs included in the carrier bandwidth part is 20 to 60, one sub-band size includes 6 RBs and the other sub-band size includes 12 RBs, as shown in fig. 4, if the number of RBs included in the current carrier bandwidth part is 26, the granularity of the CSI-RS may be determined to be 6, that is, the CSI-RS occupies 6 RBs that are consecutive in the frequency domain. For the carrier bandwidth part in other ranges, the same is true, and for brevity, no further description is given.
In the foregoing embodiment, the network device (the method 100) determines the granularity of the CSI-RS in one of multiple ways when the subband information reported by the terminal device is not detected, but the present invention is not limited thereto, and the network device may also determine the granularity of the CSI-RS in one of multiple ways when the subband information reported by the terminal device is detected. When detecting the subband information reported by the terminal device, determining the granularity of the CSI-RS in one of multiple ways may refer to each process of the embodiment of the method 100 in fig. 1, that is, the network side device detects the subband information reported by the terminal device; determining granularity of channel state information reference information (CSI-RS) through one of a plurality of ways, wherein the plurality of ways comprise: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity. To avoid repetition, further description is omitted here.
Fig. 1 illustrates a method for determining granularity of a csi reference signal according to an embodiment of the present invention, and a network device according to an embodiment of the present invention will be described in detail with reference to fig. 5.
Fig. 5 shows a block diagram of a network device according to one embodiment of the invention. As shown in fig. 5, the network device 500 includes:
a detecting module 501, configured to detect subband information reported by a terminal device;
a processing module 503, configured to determine granularity of CSI-RS in one of multiple ways when the detection module 501 does not detect the subband information reported by the terminal device;
wherein the plurality of modes include: and determining the preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularities.
Optionally, as an embodiment, the preset granularity is a default value. Further, in one embodiment, the default value may be set to 4 or 1.
Optionally, as an embodiment, the candidate granularity is at least one subband size corresponding to the current carrier bandwidth part. Wherein the processing module 503 is specifically configured to:
and selecting the granularity of the CSI-RS from at least one sub-band size corresponding to the current carrier bandwidth part.
Optionally, as an embodiment, the processing module 503 is further configured to:
and determining at least one sub-band size corresponding to the current carrier bandwidth part according to the current carrier bandwidth part and the corresponding relation between the carrier bandwidth part and the sub-band size.
Optionally, as an embodiment, the processing module 503 is specifically configured to:
one of the maximum value of the sub-band size and the minimum value of the sub-band size is selected, or one of the maximum value and the minimum value is randomly selected.
The network device provided in the embodiment of the present invention can implement each process implemented by the network device in the method embodiment of fig. 1, and is not described here again to avoid repetition.
According to the network equipment provided by the embodiment of the invention, the granularity of the CSI-RS is determined in one of a plurality of ways, so that the network equipment can determine the granularity of the CSI-RS when the network equipment does not detect the sub-band information reported by the terminal equipment, the CSI-RS is successfully sent to the terminal equipment, and the terminal and the network can communicate more accurately and efficiently.
Those skilled in the art can understand that, in the embodiment in fig. 5, the detection module 501 and the processing module 503 may be inherited in one processing module, and the processing module may be implemented as a hardware circuit, or software, or a combination of hardware and software.
Those skilled in the art can understand that the detection module 501 may be implemented to detect sub-band information reported by a terminal device; the processing module 503 may be implemented to determine the granularity of the CSI-RS in one of multiple ways when the detecting module 501 detects the subband information reported by the terminal device, or when the subband information reported by the terminal device is not decoded correctly, which is not described again for brevity.
Referring to fig. 6, fig. 6 is a structural diagram of a network device applied in the embodiment of the present invention, which can implement details in the embodiment of the method shown in fig. 1 and achieve the same effect. As shown in fig. 6, the network device 600 includes: a processor 601, a transceiver 602, a memory 603, a user interface 604, and a bus interface, wherein:
in this embodiment of the present invention, the network device 600 further includes: a computer program stored on the memory 603 and executable on the processor 301, the computer program when executed by the processor 601 implementing the steps of:
when the sub-band information reported by the terminal equipment is not detected, the granularity of the CSI-RS is determined in one of a plurality of modes;
wherein the plurality of modes include: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity.
Those skilled in the art will understand that the network device 600 further includes: a computer program stored on the memory 603 and executable on the processor 301, the computer program when executed by the processor 601 implementing the steps of: when detecting sub-band information reported by terminal equipment, determining the granularity of channel state information reference information (CSI-RS) in one of a plurality of modes; wherein the plurality of modes include: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity. For brevity, further description is omitted.
In fig. 6, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 601 and various circuits of memory represented by memory 603 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 602 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 604 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 601 is responsible for managing the bus architecture and general processing, and the memory 603 may store data used by the processor 601 in performing operations.
In the embodiment of the invention, when the sub-band information reported by the terminal equipment is not detected, the granularity of the CSI-RS is determined in one of a plurality of modes, so that the network equipment can determine the granularity of the CSI-RS when the sub-band information reported by the terminal equipment is not detected by the network equipment, the CSI-RS is successfully sent to the terminal equipment, and the terminal and the network can communicate more accurately and efficiently.
Optionally, as an embodiment, the preset granularity is a default value.
Optionally, as an embodiment, the candidate granularity is at least one subband size corresponding to a current carrier bandwidth part;
wherein the computer program when executed by the processor 601 further realizes the following steps:
and selecting the granularity of the CSI-RS from at least one sub-band size corresponding to the current carrier bandwidth part.
Optionally, as an embodiment, the computer program when executed by the processor 601 may further implement the following steps:
and determining at least one sub-band size corresponding to the current carrier bandwidth part according to the current carrier bandwidth part and the corresponding relation between the carrier bandwidth part and the sub-band size.
Optionally, as an embodiment, the computer program when executed by the processor 601 may further implement the following steps:
one of the maximum value of the sub-band size and the minimum value of the sub-band size is selected, or one of the maximum value and the minimum value is randomly selected.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements each process of the above method for determining granularity of a CSI-RS, and can achieve the same technical effect, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (16)
1. A method for determining granularity of a channel state information reference signal (CSI-RS) is applied to a network device, and is characterized by comprising the following steps:
when the sub-band information reported by the terminal equipment is not detected, the granularity of the CSI-RS is determined in one of a plurality of modes;
wherein the plurality of modes include: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity.
2. The method of claim 1, wherein the predetermined granularity is a default value.
3. The method of claim 1, wherein the alternative granularity is at least one subband size corresponding to a current carrier bandwidth portion;
wherein the selecting the granularity of the CSI-RS from the candidate granularities comprises:
and selecting the granularity of the CSI-RS from at least one sub-band size corresponding to the current carrier bandwidth part.
4. The method of claim 3, further comprising:
and determining at least one sub-band size corresponding to the current carrier bandwidth part according to the current carrier bandwidth part and the corresponding relation between the carrier bandwidth part and the sub-band size.
5. The method of claim 3, wherein selecting the granularity of the CSI-RS from at least one subband size corresponding to the current carrier bandwidth portion comprises:
one of the maximum value of the sub-band size and the minimum value of the sub-band size is selected, or one of the maximum value and the minimum value is randomly selected.
6. A network device, comprising:
the detection module is used for detecting the sub-band information reported by the terminal equipment;
the processing module is used for determining the granularity of the CSI-RS in one of a plurality of modes when the detection module does not detect the sub-band information reported by the terminal equipment;
wherein the plurality of modes include: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity.
7. The network device of claim 6, wherein the predetermined granularity is a default value.
8. The network device of claim 6, wherein the alternative granularity is at least one subband size corresponding to a current carrier bandwidth portion;
wherein the processing module is specifically configured to:
and selecting the granularity of the CSI-RS from at least one sub-band size corresponding to the current carrier bandwidth part.
9. The network device of claim 8, wherein the processing module is further configured to:
and determining at least one sub-band size corresponding to the current carrier bandwidth part according to the current carrier bandwidth part and the corresponding relation between the carrier bandwidth part and the sub-band size.
10. The network device of claim 8, wherein the processing module is specifically configured to: one of the maximum value of the sub-band size and the minimum value of the sub-band size is selected, or one of the maximum value and the minimum value is randomly selected.
11. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of determining granularity of channel state information reference signals, CSI-RS, according to any one of claims 1 to 5.
12. A method for determining granularity of a channel state information reference signal (CSI-RS) is applied to a network device, and is characterized by comprising the following steps:
detecting sub-band information reported by terminal equipment;
determining granularity of channel state information reference information (CSI-RS) through one of a plurality of ways, wherein the plurality of ways comprise: and determining preset granularity as the granularity of the CSI-RS, and selecting the granularity of the CSI-RS from the candidate granularity.
13. The method of claim 12, wherein the predetermined granularity is a default value.
14. The method of claim 12, wherein the alternative granularity is at least one subband size corresponding to a current carrier bandwidth portion;
wherein the selecting the granularity of the CSI-RS from the candidate granularities comprises:
and selecting the granularity of the CSI-RS from at least one sub-band size corresponding to the current carrier bandwidth part.
15. The method of claim 14, further comprising:
and determining at least one sub-band size corresponding to the current carrier bandwidth part according to the current carrier bandwidth part and the corresponding relation between the carrier bandwidth part and the sub-band size.
16. The method of claim 14, wherein selecting the granularity of the CSI-RS from at least one subband size corresponding to the current carrier bandwidth portion comprises:
one of the maximum value of the sub-band size and the minimum value of the sub-band size is selected, or one of the maximum value and the minimum value is randomly selected.
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| CN102687456B (en) * | 2010-01-07 | 2015-04-15 | 马维尔国际贸易有限公司 | Signaling of dedicated reference signal (DRS) precoding granularity |
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| CN106559182A (en) * | 2015-09-25 | 2017-04-05 | 中兴通讯股份有限公司 | The configuration acquisition methods of channel parameter, apparatus and system |
| CN107154841A (en) * | 2016-03-04 | 2017-09-12 | 电信科学技术研究院 | CSI back method, acquisition methods and relevant device |
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