Patent Application
20240030985
This application pertains to the field of communication technologies, and specifically relates to a CSI feedback method, a related device, and a readable storage medium.
In the prior art, for a single-transmission and reception point (STRP) channel state information (CSI) report, a network-side device configures a CSI report configuration (also referred to as CSI reporting setting or CSI-ReportConfig) corresponding to that TRP, and a terminal calculates the STRP CSI report based on CSI resources configured in the CSI report configuration corresponding to that TRP.
However, there is currently no solution for how to calculate a multi-transmission and reception point (MTRP) CSI report.
According to a first aspect, a CSI feedback method is provided, where the method includes:
According to a second aspect, a CSI feedback method is provided, including:
According to a third aspect, a CSI feedback apparatus is provided, including:
According to a fourth aspect, a CSI feedback apparatus is provided, including:
According to a fifth aspect, a terminal is provided, where the terminal includes a processor, a memory, and a program or instructions stored in the memory and capable of running on the processor, and when the program or instructions are executed by the processor, the steps of the method according to the first aspect are implemented.
According to a sixth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to obtain N CSI report configurations, where the N CSI report configurations are used for determining M pieces of first information; and the communication interface is configured to send a first CSI report, where the first CSI report is calculated based on the M pieces of first information; where the first information is any one of the following: first reference signal resource, and first parameter corresponding to the first reference signal resource; N is a positive integer; and M is an integer greater than 1.
According to a seventh aspect, a network-side device is provided. The network-side device includes a processor, a memory, and a program or instructions stored in the memory and capable of running on the processor. When the program or instructions are executed by the processor, the steps of the method according to the second aspect are implemented.
According to an eighth aspect, a network-side device is provided, including a processor and a communication interface, where the communication interface is configured to: send N CSI report configurations, where the N CSI report configurations are used for determining M pieces of first information; and receive a first CSI report, where the first CSI report is calculated based on the M pieces of first information; where the first information is any one of the following: first reference signal resource, and first parameter corresponding to the first reference signal resource; N is a positive integer; and M is an integer greater than 1.
According to a ninth aspect, a readable storage medium is provided, where a program or instructions are stored in the readable storage medium, and when the program or the instructions are executed by a processor, the steps of the method according to the first aspect are implemented, or the steps of the method according to the second aspect are implemented.
According to a tenth aspect, a chip is provided, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the steps of the method according to the first aspect or the steps of the method according to the second aspect.
According to an eleventh aspect, a computer program/program product is provided, where the computer program/program product is stored in a non-transitory storage medium, and the program/program product is executed by at least one processor to implement the steps of the method according to the first aspect or the steps of the method according to the second aspect.
According to a twelfth aspect, a communication device is provided, configured to perform the steps of the method according to the first aspect or the steps of the method according to the second aspect.
The following clearly describes the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are only some rather than all of the embodiments of this application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of this application shall fall within the protection scope of this application.
The terms “first”, “second”, and the like in the specification and claims of this application are used to distinguish between similar objects rather than to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable in appropriate circumstances such that the embodiments of this application can be implemented in other orders than the order illustrated or described herein. In addition, objects distinguished by “first” and “second” are generally of a same type, and the quantities of the objects are not limited. For example, there may be one or more first objects. In addition, “and/or” in the specification and claims represents at least one of connected objects, and the character “I” generally indicates that the contextually associated objects have an “or” relationship.
It is worth noting that the technologies described in the embodiments of this application are not limited to long term evolution (LTE)/LTE-Advanced (LTE-A) systems, but may also be used in other wireless communication systems such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single-carrier frequency division multiple access (SC-FDMA), and other systems. The terms “system” and “network” in the embodiments of this application are often used interchangeably, and the technology described herein may be used in the above-mentioned systems and radio technologies as well as other systems and radio technologies. In the following descriptions, a new radio (NR) system is described for an illustration purpose, and NR terms are used in most of the following descriptions, although these technologies may also be applied to other applications than an NR system application, for example, the 6th generation (6G) communication system.
For ease of understanding, the following describes some contents included in the embodiments of this application:
1. Multi Transmission and Reception Point (TRP) Transmission Technology
The standard has introduced a multi-transmission and reception point (multi-TRP)/multi-panel scenario, to improve transmission reliability and throughput performance. For example, the UE can receive same data or different data from a plurality of TRPs.
An ideal backhaul or a non-ideal backhaul exists between a plurality of TRPs.
For the non-ideal backhaul, there is a relatively long latency in exchange of information between the plurality of TRPs. It is more suitable for independent scheduling, where response information (for example, acknowledgement (ACK) or negative acknowledgement (NACK)) and channel state information (CSI) reports are reported to each TRP separately. Generally, the non-ideal backhaul is suitable for multiple downlink control information (DCI) scheduling, that is, each TRP sends its own physical downlink control channel (PDCCH), and each PDCCH schedules its own physical downlink shared channel (PDSCH), and multiple control resource sets (CORESET) configured for UE are associated with different radio resource control (RRC) parameters, namely control resource set pool indexes (CORESET Pool Index), and correspond to different TRPs. A plurality of PDSCHs scheduled by a plurality of DCIs may not overlap, partially overlap, or completely overlap in time-frequency resources. On the overlapping time-frequency resources, each TRP performs independent precoding based on its own channel, and the UE receives multi-layer data streams belonging to a plurality of PDSCHs in non-coherent joint transmission (NCJT) mode.
For the ideal backhaul, scheduling information and UE feedback information can be exchanged between the plurality of TRPs in real time, and ACK/NACK and CSI reports can be reported to any one TRP. In addition to scheduling multiple PDSCHs using multiple DCIs, it is also possible to schedule PDSCHs using a single DCI. The transmission schemes are as follows:
Space division multiplexing (SDM): Different data layers of a same transport block (TB) come from NCJT transmissions of different TRPs.
Frequency division multiplexing (FDM): Different frequency domain resources mapped by a same redundant version (RV) of a same TB are sent from different TRPs or different RVs of a same TB are mapped to different frequency domain resources and sent from different TRPs.
Time division multiplexing (TDM): Different repetitions of different RVs of a same TB come from different TRPs, for example, repetitions within one slot or repetitions within multiple slots.
2. CSI Report Configuration of a Single TRP (Also Known as CSI Reporting Setting or CSI-ReportConfig)
3. Fields (Field) in CSI Report Configuration
A CSI report configuration may include the following fields:
4. CSI Measurement
If CSI-IM is used for interference measurement, each channel measurement CSI-RS resource is associated with one CSI-IM resource based on the sequence of the CSI-RS resources and CSI-IM resources in corresponding resource sets. The quantity of channel measurement CSI-RS resources is the same as the quantity of interference measurement CSI-RS resources.
UE can assume that there is the same reception spatial information between the channel measurement NZP CSI-RS resource and interference measurement CSI-IM resource in one report setting.
The UE can assume that there is the same reception spatial information between the channel measurement NZP CSI-RS resource and interference measurement NZP CSI-RS resource in one report setting.
5. Potential CSI Framework for Multi-TRP
6. NZP-CSI RS
As indicated by higher layer parameters, CSI resource configuration (CSI-ResourceConfig) and NZP-CSI-RS resource set (NZP-CSI-RS-ResourceSet), UE can configure one or more NZP CSI-RS resource set configurations, each NZP CSI-RS resource set consisting of K (K>1) NZP CSI-RS resources.
Except for NZP CSI-RS resources used for interference measurement, the CSI-RS resource configurations in a same resource set are configured with the same density and the same port quantity. The UE expects that all CSI-RS resources in one resource set are configured with the same start resource block (RB), the same RB quantity, and the same code division multiplexing (CDM) type.
The UE can assume that in one report config, one or more NZP CSI-RS resources for channel measurement and one or more CSI-IM resources for interference measurement or multiple NZP CSI-RS resources for interference measurement have a “QCL-TypeD” quasi-co-location (QCL) relationship at the resource level.
The UE can assume that in one report config, one or more NZP CSI-RS resources for channel measurement and one or more CSI-IM resources for interference measurement have a “QCL-TypeD” quasi-co-location (Quasi Co-Location, QCL) relationship at the resource level.
If NZP CSI-RS is used for interference measurement, the UE may expect no more than one NZP CSI-RS resource is configured for channel measurement, and may expect no more than NZP CSI-RS s corresponding to 18 ports are configured in one NZP CSI-RS resource set for interference measurement.
7. Resource Setting Configuration
In a case that one resource setting is configured, this resource setting is used for layer 1 (L1) L1-reference signal received power (RSRP) channel measurement or L1-signal-to-noise and interference ratio (Signal-to-Noise and Interference Ratio, SINR) channel and interference measurement.
In a case that two resource settings are configured, the first resource setting is used for channel measurement, and the second resource setting is used for interference measurement (which may be based on CSI-IM or NZP CSI-RS).
In a case that three resource settings are configured, the first resource setting is used for channel measurement, the second resource setting is used for CSI-IM based interference measurement, and the third resource setting is used for NZP CSI-RS based interference measurement.
In a case that one resource setting is configured, this resource setting is used for L1-RSRP channel measurement or L1-SINR channel and interference measurement.
In a case that two resource settings are configured, the first resource setting is used for channel measurement, and the second resource setting is used for CSI-IM based interference measurement (or NZP CSI-RS based interference measurement in the case of L1-SINR measurement).
The following describes in detail the CSI feedback method provided in the embodiments of this application by using some embodiments and application scenarios thereof with reference to the accompanying drawings.
Refer to
Step 201. A terminal obtains N CSI report configurations, where the N CSI report configurations are used for determining M pieces of first information.
In this embodiment of this application, the terminal obtaining N CSI report configurations may include but is not limited to the following implementations:
Implementation 1. The terminal receives N CSI report configurations.
In this implementation, the N CSI report configurations may be configured by a network-side device to the terminal.
Implementation 2. The terminal receives indication information, where the indication information is used for indicating indexes of N CSI report configurations out of the pre-configured R CSI report configurations, R being an integer greater than or equal to N.
In implementation 2, the R CSI report configurations may be agreed upon by a protocol or configured by a network-side device. When pre-configuring the R CSI report configurations, the network-side device may use the indication information to indicate that N of the R CSI report configurations are used for determining M pieces of first information.
Optionally, the N CSI report configurations are indicated by higher layer signaling or MAC CE. In implementation 1, the network-side device may configure the N CSI report configurations through higher layer signaling (such as RRC signaling) or MAC CE. In implementation 2, the indication information is higher layer signaling or MAC CE, meaning that the network-side device indicates indexes of the N CSI report configurations through higher layer signaling or MAC CE.
In this embodiment of this application, it may be considered that there is a correspondence between a CSI report configuration and first information determined by the CSI report configuration. For example, if CSI report configuration 1 is used for determining first information 1, it may be considered that CSI report configuration 1 corresponds to first information 1. Since the N CSI report configurations are used for determining M pieces of first information, it may be considered that the N CSI report configurations correspond to M pieces of first information, where N is a positive integer, and M is an integer greater than 1. Optionally, the value of N may include the following cases.
Case 1: N is equal to 1.
In this case, one CSI report configuration corresponds to M pieces of first information, that is, one CSI report configuration is used for determining M pieces of first information.
Case 2: N is equal to M.
In this case, M CSI report configurations correspond to M pieces of first information. Optionally, the M CSI report configurations may be in one-to-one correspondence with the M pieces of first information, that is, different CSI report configurations in the M CSI report configurations are used for determining different first information among the M pieces of first information.
Case 3: N is less than M.
In this case, at least one first target CSI report configuration in the M CSI report configurations corresponds to multiple (at least two) pieces of first information, and the first target CSI report configuration is used for determining at least two pieces of first information, that is, at least two of the M pieces of first information are determined by a same CSI report configuration.
In this embodiment of this application, the M pieces of first information determined by the N CSI report configurations may correspond to Q first objects, that is, the M pieces of first information may be used for calculating target parameters of the Q first objects, where Q is a positive integer, and the first object may be any one of the following: TRP; CORESETPoolIndex; and panel.
Optionally, Q may be less than or equal to M, but is not limited thereto. For example, in a case that Q is equal to M, the terminal may calculate, based on each of the M pieces of first information, a target parameter of a first object corresponding to this first information, so as to obtain the target parameters of the M first objects.
In this embodiment of this application, optionally, the first information may be any one of the following: first reference signal resource, and first parameter corresponding to the first reference signal resource.
In a case that the first information is the first reference signal resource, a correspondence between the M first reference signal resources and the Q first objects can be predetermined, such as agreed upon by a protocol (or set by default) or configured by the network-side device, which can be specifically determined according to the actual situation, and is not limited in the embodiments of this application.
In practical application, the first reference signal resource may include any one of the following: reference signal resource for channel measurement (Channel Measurement Resource (or Resource for Channel Measurement), CMR); and reference signal resource for interference measurement (Interference Measurement Resource (or Resource for Interference Measurement), IMR). It should be noted that in a case that the first reference signal resource includes CMR and IMR, the quantities of the CMRs and IMRs included in the first reference signal resource may be equal or unequal, which may be specifically determined according to the actual situation, and is not limited in the embodiments of this application.
In a case that the first object is the first parameter, since the first parameter corresponds to the first reference signal resource, the correspondence between the M first reference signal resources and the Q first objects can be predetermined, so that the correspondence between the M first parameters and the Q first objects can be determined.
Optionally, the first parameter may include but is not limited to at least one of the following: CMR group; CMR set; TRP identification information; or QCL assumption.
It should be noted that the first parameter may not include CMR group and CMR set at the same time. In a case that the first parameter is CMR set, one or more CMR groups included in a same CMR set all correspond to a same first reference signal resource. In a case that the first parameter is CMR group, each different CMR group included in a same CMR set corresponds to a different first reference signal resource.
Step 202: The terminal sends a first CSI report, where the first CSI report is calculated based on the M pieces of first information.
During specific implementation, after obtaining the N CSI report configurations, the terminal may determine M pieces of first information based on the N CSI report configurations; calculate target parameters of Q TRPs based on the correspondence between the M pieces of first information and the Q first objects; and generate a first CSI report, where the first CSI report includes the target parameters of the Q TRPs.
The target parameter of each TRP is determined based on a channel measurement result for that TRP and an interference measurement result for that TRP. The channel measurement result is obtained through CMR measurement, and the interference measurement result is obtained through IMR measurement. The target parameter may include at least one of the following: CQI, PMI, RI, or the like.
In a case that the first information is the first reference signal resource, the terminal may directly measure the M first reference signal resources to obtain the target parameters of the Q TRPs.
In a case that the first information is the first parameter, the terminal may first determine M first reference signal resources corresponding to M first parameters, and then obtain the target parameters of the Q TRPs based on the M first reference signal resources determined through measurement.
According to the CSI feedback method provided in this embodiment of this application, the terminal may determine M first reference signal resources or M first parameters based on the one or more CSI report configurations sent by the network-side device, where the first parameters correspond to the first reference signal resources; and then the terminal may calculate a CSI report, that is, an MTRP CSI report, based on the M first reference signal resources or the M first parameters. In this way, the calculation of the MTRP CSI report is realized. Additionally, resource overheads for configuring CSI report configurations can also be reduced in a case that the MTRP CSI report is calculated based on M pieces of first information configured in one CSI report configuration.
The following describes the N CSI report configurations in the embodiments of this application.
In an embodiment of this application, optionally, the N CSI report configurations are configured with P first fields, and the first CSI report is calculated based on the M pieces of first information and the P first fields, where P is a positive integer.
In this optional implementation, in some embodiments, P may be greater than or equal to N. In a case that P is equal to N, each of the N CSI report configurations is configured with a first field; in a case that P is greater than N, at least one second CSI report configuration in the N CSI report configurations is configured with at least two first fields.
Certainly, in some other embodiments, P may be less than N. In this case, among the N CSI report configurations, some may be configured with no first field, and some may be configured with one or more first fields, which may be determined according to the actual situation, and is not limited in the embodiments of this application.
In this way, as compared to the quantity of each field in one CSI report configuration being 1 in the prior art, the CSI report configuration in this optional implementation can be configured with zero, one or more first fields, thereby improving the configuration flexibility of the CSI report configuration.
In addition, in this optional implementation, the P first fields may be used for determining valid information, in the M pieces of first information, for calculating the first CSI report. In this way, after determining the M pieces of first information, the terminal may determine the valid information in the M pieces of first information based on the P first fields, and calculate the first CSI report based only on the valid information in the M pieces of first information, thereby reducing the overheads for calculating the first CSI report by the terminal.
During specific implementation, the P first fields may indicate restriction information of the Q first objects, so as to determine the valid information in the M pieces of first information, where the restriction information of the first object may include at least one of the following: RI restriction information of the first object; port restriction information of the first object; or codebook restriction information of the first object.
It should be noted that the restriction information indicated by different first fields may be the same or different; and the restriction information of different first objects indicated by a same first field may be the same or different, which may be specifically determined according to the actual situation, and is not limited in the embodiments of this application.
Therefore, in the embodiments of this application, different first objects can have different restriction information, and the restriction information of Q first objects can be indicated using one or more first fields, thereby implementing flexible indication of the restriction information.
Optionally, the first field may include but is not limited to at least one of the following: codebook configuration field; non-precoding matrix port indication field; report configuration type field; report quantity field; channel quality indicator CQI table field; or subband size field.
In this embodiment of this application, optionally, the CSI report configuration may include only the first field. This can reduce the quantity of information bits of the CSI report configuration, thereby reducing the configuration overheads of the CSI report configuration. Certainly, it can be understood that the CSI report configuration may include the 16 fields described above, which may be specifically determined according to the actual situation, and is not limited in the embodiments of this application.
In the embodiments of this application, the N CSI report configurations are used for determining M pieces of first information. Optionally, the N CSI report configurations may be used for determining the M pieces of first information based on a correspondence between a target field and the first information, where the target field may be the above-mentioned first field or a second field, and the second field may be in the same or different representation form as the first field. In the following descriptions, the target field being the first field is used for illustration, but the representation form of the target field is not limited thereto.
During actual application, a correspondence between the target field and the first information may be agreed upon by a protocol or configured by a network-side device, which can be specifically determined according to the actual situation, and is not limited in the embodiments of this application.
During specific implementation, the manner in which the N CSI report configurations are used for determining the M pieces of first information varies with the value of N. Details are as follows:
1. N is equal to 1.
In this case, optionally, in a case that N is equal to 1, the CSI report configuration may satisfy any one of the following:
In this optional implementation, the M pieces of first information are determined through one CSI report configuration. In (1) and (2), the M pieces of first information are determined through one CSI report configuration in different ways. Details are as follows:
In a case that the CSI report configuration satisfies (1), M pieces of first information is determined by configuring M first fields in one CSI report configuration. This can reduce the quantity of CSI report configurations configured, thereby reducing the signaling overheads for CSI feedback.
Optionally, the M first fields may be in one-to-one correspondence with the M pieces of first information, which is not limited thereto.
In a case that the CSI report configuration satisfies (2), M pieces of first information is determined by configuring one first field in one CSI report configuration. In this way, on the basis of (1), the quantity of first fields configured in the CSI report configuration can be further reduced, and thus the quantity of information bits configured in the CSI report configuration can be reduced, further reducing the signaling overheads for CSI feedback.
In (2), one first field may correspond to M pieces of first information through corresponding restriction information. Optionally, the restriction information corresponding to the first field may include restriction information of the above-mentioned Q first objects, where the restriction information of each first object may include at least one of the following: RI restriction information of the first object; port restriction information of the first object; or codebook restriction information of the first object.
2. N is equal to M.
In this case, optionally, the M first fields configured in M CSI report configurations correspond to the M pieces of first information, where each CSI report configuration is configured with one of the M first fields.
In this optional implementation, the M pieces of first information are determined through the M CSI report configurations. That the M CSI report configurations are configured with M first fields may be understood as that each CSI report configuration is configured with one first field. In other words, each of the M pieces of first information is determined by one of the M CSI report configurations. The correspondence between the M first fields and the M pieces of first information may be a one-to-one correspondence, which is not limited to thereto.
Optionally, that M first fields configured in M CSI report configurations correspond to the M pieces of first information satisfies any one of the following:
In (a) and (b), each CSI report configuration is configured with one first field, and each first field configured in each CSI report configuration corresponds to one piece of first information.
The main difference between (a) and (b) lies in the configuration ways of the M pieces of first information. Specifically, in (a), the M pieces of first information are configured by one of the M CSI report configurations, that is, configured by a first CSI report configuration, and each first field configured in each CSI report configuration corresponds to a different piece of first information in the M pieces of first information; in (b), the M pieces of first information are configured by all of the M CSI report configurations, each CSI report configuration is configured with one piece of first information, and the first field configured in each CSI report configuration correspond to the first information configured in that CSI report configuration.
During specific implementation, the first CSI report configuration may be the first, the last or a specified CSI report configuration among the M CSI report configurations, which may be determined according to the actual situation, and is not limited in the embodiments of this application.
In a case that the first information is the first reference signal resource, the first information may be configured by at least one of the following in the CSI report configuration: resourcesForChannelMeasurement field, csi-IM-ResourcesForInterference field, and nzp-CSI-RS-ResourcesForInterference field.
In a case that the first information is the first parameter, the first information may be configured by an existing field in the CSI report configuration or by a new field in the CSI report configuration (the new field may be dedicated to setting the first parameter), which may be specifically determined according to the actual situation, and is not limited in the embodiments of this application.
In the embodiments of this application, optionally, at least one of the N CSI report configurations is configured with unequal quantities of interference measurement resources IMRs and channel measurement resources CMRs.
In practice application, one IMR may correspond to one or more CMRs, and one CMR may also correspond to one or more IMRs, which may be specifically determined according to the actual situation, and is not limited in the embodiments of this application.
This can improve the configuration flexibility of the CSI report configuration compared to the prior art that strictly requires the quantities of IMRs and CMRs to be equal within a same CSI report configuration.
Optionally, after the terminal obtains N CSI report configurations and before the terminal sends a CSI report, the method further includes:
In this optional implementation, when measuring a specific IMR, the terminal may perform measurement based on the QCL assumptions of all CMRs corresponding to that IMR, meaning that an interference measurement result of a specific IMR may be obtained based on the QCL assumptions of all CMRs corresponding to that IMR.
It should be noted that in a case that the quantity of CMRs corresponding to a specific IMR is greater than 1, the terminal may perform measurement based on the QCL assumptions of some or all of the CMRs corresponding to that IMR, which may be specifically determined according to the actual situation, and is not limited in the embodiments of this application.
Optionally, in a case that N is greater than 1 and the first IMR corresponds to at least two CMRs, the at least two CMRs are configured by at least one CSI report configuration among the N CSI report configurations.
In this optional implementation, CMRs corresponding to a same IMR may be configured by one or more CSI report configurations.
For example, it is assumed that the N CSI report configurations include CSI report configuration 1 and CSI report configuration 2, with CMR1, CMR2, CMR3, and IMR1 configured in CSI report configuration 1, and CMR4, CMR5, and IMR2 configured in CSI report configuration 2.
In one implementation, IMR1 may correspond to CMR1, CMR2, CMR3, and CMR4, where the CMRs corresponding to IMR1 come from CSI report configuration 1 and CSI report configuration 2; and IMR2 may correspond to CMR5, where the CMR corresponding to IMR2 comes from CSI report configuration 2.
In another implementation, IMR1 may correspond to CMR1, CMR2, and CMR3, where the CMRs corresponding to IMR1 come from CSI report configuration 1; and IMR2 may correspond to CMR4 and CMR5, where the CMRs corresponding to IMR2 comes from CSI report configuration 2.
Optionally, a correspondence between the IMRs and CMRs configured in the N CSI report configurations may be indicated by any one of the following: higher layer signaling; and media access control MAC control element CE.
During specific implementation, in a case that the correspondence between the IMRs and CMRs configured in the N CSI report configurations is indicated by a MAC CE, optionally, the MAC CE may indicate the correspondence between the IMRs and CMRs through a bit map.
For ease of understanding, the following provides description with reference to Table 1.
In Table 1, it is assumed that a bit value of 0 indicates absence of a correspondence, and a bit value of 1 indicates presence of a correspondence. Then in Table 1, IMR1 corresponds to CMR1; IMR2 corresponds to CMR2; and IMR3 corresponds to CMR1 and CMR2.
In a case that the correspondence between IMRs and CMRs is indicated by a MAC CE, the correspondence between IMRs and CMRs can be modified by changing the bit values, thereby improving the flexibility of indicating the correspondence between IMRs and CMRs.
In a case that a correspondence between the IMRs and CMRs configured in the N CSI report configurations is indicated by higher layer signaling, optionally, the higher layer signaling may indicate a quantity T of IMRs, each of which corresponds to multiple CMRs, where T is a positive integer. Then, it can be determined that in one IMR resource set, the first T or last T IMR resources correspond to multiple CMRs, and the remaining IMRs correspond to one CMR. In this case, the IMRs corresponding to one CMR are in one-to-one correspondence with the CMRs for STRP measurement hypothesis, and the IMRs corresponding to multiple CMRs are in one-to-one correspondence with the CMRs for NCJT measurement hypothesis.
Certainly, it can be understood that in other implementations, the correspondence between the IMRs and CMRs configured in the N CSI report configurations can alternatively be predetermined by a protocol, which is not limited in the embodiments of this application.
Optionally, in a case that a quantity of IMRs configured in a second CSI report configuration is 1, any one of the following is satisfied:
For ease of understanding, descriptions are provided by using examples.
It is assumed that the N CSI report configurations include CSI report configuration 1 and CSI report configuration 2, with CMR1, CMR2, CMR3, and IMR1 configured in CSI report configuration 1, and CMR4 and CMR5 configured in CSI report configuration 2. For (i), IMR1 may correspond to CMR1, CMR2 and CMR3; and for (ii), IMR1 may correspond to CMR1, CMR2, CMR3, CMR4, and CMR5.
This can improve the manner of determining the CMR corresponding to the IMR, thereby improving the flexibility of determining the correspondence between IMRs and CMRs.
In the embodiments of this application, optionally, IMRs configured in the N CSI report configurations are configured with QCL assumptions.
During specific implementation, each IMR may be configured with one or more QCL assumptions, and the quantity of QCL assumptions configured by the IMR may be predetermined by a protocol or configured by a network-side device, which may be specifically determined according to the actual situation, and is not limited in the embodiments of this application. This can improve the configuration flexibility of IMRs compared to the prior art that only CMRs are configured with QCL assumptions.
Optionally, after the terminal obtains N CSI report configurations and before the terminal sends a CSI report, the method further includes:
In this optional implementation, the terminal may perform IMR measurement directly based on the QCL assumptions of the IMR, without first determining the CMR corresponding to the IMR and then performing IMR measurement based on the QCL assumptions of the CMR corresponding to the IMR. This can improve the speed of IMR measurement.
Optionally, after the terminal obtains N CSI report configurations and before the terminal sends a CSI report, the method further includes:
During specific implementation, in a case that R is equal to 1, the terminal may calculate the CSI report based on the IMR and CMR with the same QCL assumption.
In a case that R is greater than 1, each QCL assumption corresponds to one CMR with the same QCL assumption, and the terminal may calculate the CSI report based on the IMR with the same QCL assumption and all CMRs.
In this way, the CSI report is calculated based on the IMR and CMR with the same QCL assumption, thereby improving the reliability of CSI report calculation.
Refer to
Step 301. The network-side device sends N CSI report configurations, where the N CSI report configurations are used for determining M pieces of first information.
Step 302. The network-side device receives a first CSI report, where the first CSI report is calculated based on the M pieces of first information.
The first information is any one of the following: first reference signal resource, and first parameter corresponding to the first reference signal resource; N is a positive integer; and M is an integer greater than 1.
Optionally, the N CSI report configurations are configured with P first fields, and the first CSI report is calculated based on the M pieces of first information and the P first fields, where P is a positive integer.
Optionally, in a case that N is equal to 1, the CSI report configuration satisfies any one of the following:
Optionally, in a case that N is equal to M, M first fields configured in M CSI report configurations correspond to the M pieces of first information; where
Optionally, that M first fields configured in M CSI report configurations correspond to the M pieces of first information satisfies any one of the following:
Optionally, at least one of the N CSI report configurations is configured with unequal quantities of interference measurement resources IMRs and channel measurement resources CMRs.
Optionally, the first IMR is any one of the IMRs configured in the N CSI report configurations, and the first IMR is used to obtain, based on a quasi co-location QCL assumption of all CMRs corresponding to a first IMR, a first interference measurement result for the first IMR; where the first CSI report is calculated based on the first interference measurement result.
Optionally, in a case that N is greater than 1 and the first IMR corresponds to at least two CMRs, the at least two CMRs are configured by at least one CSI report configuration among the N CSI report configurations.
Optionally, a correspondence between the IMRs and CMRs configured in the N CSI report configurations is indicated by any one of the following: higher layer signaling; and media access control MAC control element CE.
Optionally, in a case that a quantity of IMRs configured in a second CSI report configuration is 1, any one of the following is satisfied:
Optionally, IMRs configured in the N CSI report configurations are configured with QCL assumptions.
Optionally, the first parameter includes at least one of the following: CMR group; CMR set; TRP identification information; or QCL assumption.
Optionally, the first field includes at least one of the following: codebook configuration field; non-precoding matrix port indication field; report configuration type field; report quantity field; channel quality indicator CQI table field; or subband size field.
Optionally, the N CSI report configurations are indicated by higher layer signaling or MAC CE.
It should be noted that this embodiment serves as an embodiment of the network-side device corresponding to the method embodiment in
It should be noted that various optional implementations described in the embodiments of this application may be implemented in combination or may be implemented separately, which is not limited in the embodiments of this application.
For ease of understanding, descriptions are provided by using examples.
Example 1: The MAC CE can indicate the correspondence between IMRs and CMRs through one bit map.
Example 2: The higher layer signaling indicates a quantity N of IMRs, each of which corresponds to multiple CMRs. Then, in one IMR resource set, the first N or last N IMR resources correspond to multiple CMRs, and the remaining IMRs correspond to one CMR. In this case, the IMRs corresponding to one CMR are in one-to-one correspondence with the CMRs for STRP measurement hypothesis, and the IMRs corresponding to multiple CMRs are in one-to-one correspondence with the CMRs for NCJT measurement hypothesis.
Example 1: The MAC CE indicates the correspondence between IMRs and CMRs through one bit map.
Example 2: The higher layer signaling indicates a quantity N of IMRs, each of which corresponds to multiple CMRs. Then, in one IMR resource set, the first N or last N IMR resources correspond to multiple CMRs, and the remaining IMRs correspond to one CMR. In this case, the IMRs corresponding to one CMR are in one-to-one correspondence with the CMRs for STRP measurement hypothesis, and the IMRs corresponding to multiple CMRs are in one-to-one correspondence with the CMRs for NCJT measurement hypothesis.
Note: The CMRs in (a) and (b) can come from one reporting setting or multiple reporting settings.
In the embodiment of the application, in the case of calculating an MTRP CSI report based on one CSI reporting setting, different TRPs can have different codebook restrictions, rank restrictions, and port restrictions; multiple CSI reporting settings can be used to configure codebook restrictions, rank restrictions, and port restrictions of different TRPs; and the quantity of IMRs can be different from that of CMRs. Therefore, in this embodiment of this application, the CSI reporting setting supports configuration of multiple TRPs with different restrictions; the CSI reporting setting supports unequal quantities of IMRs and CMRs, so that signaling overheads can be reduced and MTRP CSI measurement can be performed; and the mapping relationship between IMRs and CMRs can be further modified through higher layer signaling.
It should be noted that the CSI feedback method provided in this embodiment of this application may be performed by a CSI feedback apparatus or a control module for performing the CSI feedback method in the CSI feedback apparatus. This embodiment of this application uses the CSI feedback apparatus performing the CSI feedback method as an example to describe the CSI feedback apparatus provided in the embodiments of this application.
Refer to
As shown in
Optionally, the N CSI report configurations are configured with P first fields, and the first CSI report is calculated based on the M pieces of first information and the P first fields, where P is a positive integer.
Optionally, in a case that N is equal to 1, the CSI report configuration satisfies any one of the following:
Optionally, in a case that N is equal to M, M first fields configured in M CSI report configurations correspond to the M pieces of first information; where
Optionally, that M first fields configured in M CSI report configurations correspond to the M pieces of first information satisfies any one of the following:
Optionally, at least one of the N CSI report configurations is configured with unequal quantities of interference measurement resources IMRs and channel measurement resources CMRs.
Optionally, the CSI feedback apparatus further includes:
Optionally, a correspondence between the IMRs and CMRs configured in the N CSI report configurations is indicated by any one of the following: higher layer signaling; and media access control MAC control element CE.
Optionally, in a case that a quantity of IMRs configured in a second CSI report configuration is 1, any one of the following is satisfied:
Optionally, IMRs configured in the N CSI report configurations are configured with QCL assumptions.
Optionally, the CSI feedback apparatus 400 further includes:
Optionally, the CSI feedback apparatus 400 further includes:
Optionally, the first parameter includes at least one of the following: CMR group; CMR set; TRP identification information; or QCL assumption.
Optionally, the first field includes at least one of the following: codebook configuration field; non-precoding matrix port indication field; report configuration type field; report quantity field; channel quality indicator CQI table field; or subband size field.
Optionally, the N CSI report configurations are indicated by higher layer signaling or MAC CE.
The CSI feedback apparatus 400 may be an apparatus, or may be a component, an integrated circuit, or a chip in a terminal. The apparatus may be a mobile terminal or a non-mobile terminal. For example, the mobile terminal may include but is not limited to the types of the terminal 11 listed above, and the non-mobile terminal may be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine, a self-service machine or the like, which are not specifically limited in the embodiments of this application.
The CSI feedback apparatus 400 provided in this embodiment of this application can implement the processes implemented by the method embodiment in
Refer to
As shown in
Optionally, the N CSI report configurations are configured with P first fields, and the first CSI report is calculated based on the M pieces of first information and the P first fields, where P is a positive integer.
Optionally, in a case that N is equal to 1, the CSI report configuration satisfies any one of the following:
Optionally, in a case that N is equal to M, M first fields configured in M CSI report configurations correspond to the M pieces of first information; where
Optionally, that M first fields configured in M CSI report configurations correspond to the M pieces of first information satisfies any one of the following:
Optionally, at least one of the N CSI report configurations is configured with unequal quantities of interference measurement resources IMRs and channel measurement resources CMRs.
Optionally, the first IMR is any one of the IMRs configured in the N CSI report configurations, and the first IMR is used to obtain, based on a quasi co-location QCL assumption of all CMRs corresponding to a first IMR, a first interference measurement result for the first IMR; where the first CSI report is calculated based on the first interference measurement result.
Optionally, in a case that N is greater than 1 and the first IMR corresponds to at least two CMRs, the at least two CMRs are configured by at least one CSI report configuration among the N CSI report configurations.
Optionally, a correspondence between the IMRs and CMRs configured in the N CSI report configurations is indicated by any one of the following: higher layer signaling; and media access control MAC control element CE.
Optionally, in a case that a quantity of IMRs configured in a second CSI report configuration is 1, any one of the following is satisfied:
Optionally, IMRs configured in the N CSI report configurations are configured with QCL assumptions.
Optionally, the first parameter includes at least one of the following: CMR group; CMR set; TRP identification information; or QCL assumption.
Optionally, the first field includes at least one of the following: codebook configuration field; non-precoding matrix port indication field; report configuration type field; report quantity field; channel quality indicator CQI table field; or subband size field.
Optionally, the N CSI report configurations are indicated by higher layer signaling or MAC CE.
The CSI feedback apparatus 500 may be an apparatus, or may be a component, an integrated circuit, or a chip in a network-side device. The network-side device may include but is not limited to the foregoing types of the network-side device 12, which is not specifically limited in the embodiments of this application.
The CSI feedback apparatus 500 provided in this embodiment of this application can implement the processes implemented by the method embodiment in
Optionally, as shown in
An embodiment of this application further provides a terminal including a processor and a communication interface. The processor is configured to obtain N CSI report configurations, where the N CSI report configurations are used for determining M pieces of first information; the first information is any one of the following: first reference signal resource, and first parameter corresponding to the first reference signal resource; N is a positive integer; and M is an integer greater than 1; and the communication interface is configured to send a first CSI report, where the first CSI report is calculated based on the M pieces of first information. It should be noted that this terminal embodiment corresponds to the foregoing terminal-side method embodiment. All implementation processes and implementations of the foregoing method embodiment are applicable to this terminal embodiment, with the same technical effects achieved. Specifically,
The terminal 700 includes but is not limited to at least some of a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710.
It can be understood by those skilled in the art that the terminal 700 may further include a power supply (for example, a battery) supplying power to the components. The power supply may be logically connected to the processor 710 via a power management system, so that functions such as charge management, discharge management, and power consumption management are implemented by using the power management system. The structure of the terminal shown in
It should be understood that in this embodiment of this application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042. The graphics processing unit 7041 processes image data of a static picture or a video that is obtained by an image capture apparatus (for example, a camera) in a video capture mode or an image capture mode. The display unit 706 may include a display panel 7061. The display panel 7061 may be configured in a form of a liquid crystal display, an organic light-emitting diode display, or the like. The user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touchscreen. The touch panel 7071 may include two parts: a touch detection apparatus and a touch controller. The other input devices 7072 may include but are not limited to a physical keyboard, a functional button (such as a volume control button or a power on/off button), a trackball, a mouse, and a joystick. Details are not described herein.
In this embodiment of this application, the radio frequency unit 701 transmits downlink data received from a network-side device to the processor 710 for processing, and in addition, transmits uplink data to the network-side device. Generally, the radio frequency unit 701 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.
The memory 709 may be configured to store software programs or instructions and various data. The memory 709 may include a program or instruction storage area and a data storage area. The program or instruction storage area may store an operating system, an application program or instruction required by at least one function (for example, a sound play function or an image play function), and the like. In addition, the memory 709 may include a high-speed random access memory, and may further include a non-volatile memory, where the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or a flash memory, for example, at least one disk storage device, flash memory device, or other volatile solid-state storage device.
The processor 710 may include one or more processing units. Optionally, an application processor and a modem processor may be integrated in the processor 710. The application processor primarily processes an operating system, user interfaces, application programs or instructions, and the like. The modem processor primarily processes radio communication, for example, being a baseband processor. It can be understood that the modem processor may alternatively be not integrated in the processor 710.
The processor 710 is configured to obtain N CSI report configurations, where the N CSI report configurations are used for determining M pieces of first information.
The radio frequency unit 701 is configured to send a first CSI report, where the first CSI report is calculated based on the M pieces of first information.
The first information is any one of the following: first reference signal resource, and first parameter corresponding to the first reference signal resource; N is a positive integer; and M is an integer greater than 1.
It should be noted that the terminal 700 in this embodiment can implement the processes of the method embodiment corresponding to
An embodiment of this application further provides a network-side device including a processor and a communication interface. The communication interface is configured to: send N CSI report configurations, where the N CSI report configurations are used for determining M pieces of first information; and receive a first CSI report, where the first CSI report is calculated based on the M pieces of first information; where the first information is any one of the following: first reference signal resource, and first parameter corresponding to the first reference signal resource; N is a positive integer; and M is an integer greater than 1. It should be noted that the network-side device embodiment corresponds to the foregoing method embodiment on the network-side device side. All implementation processes and implementations of the foregoing method embodiment are applicable to this network-side device embodiment, with the same technical effects achieved.
Specifically, an embodiment of this application further provides a network-side device. As shown in
The frequency band processing apparatus may be located in the baseband apparatus 83. The method executed by the network-side device in the foregoing embodiments may be implemented in the baseband apparatus 83, and the baseband apparatus 83 includes a processor 84 and a memory 85.
The baseband apparatus 83 may include, for example, at least one baseband processing unit, where a plurality of chips are disposed on the baseband processing unit. As shown in
The baseband apparatus 83 may further include a network interface 86, configured to exchange information with the radio frequency apparatus 82, where the interface is, for example, a common public radio interface (CPRI).
Specifically, the network-side device in this embodiment of the present invention further includes: instructions or a program stored in the memory 85 and capable of running on the processor 84. The processor 84 invokes the instructions or program in the memory 85 to execute the method executed by the modules shown in
An embodiment of this application further provides a readable storage medium. The readable storage medium may be non-volatile or volatile. The readable storage medium stores a program or instructions. When the program or instructions are executed by a processor, the processes of the foregoing method embodiments shown in
The processor is a processor in the terminal described in the foregoing embodiment. The readable storage medium includes a computer-readable storage medium such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc.
An embodiment of this application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run a program or instructions to implement the processes of the method embodiments corresponding to
It should be understood that the chip mentioned in embodiment of this application may also be referred to as a system-level chip, a system chip, a system on a chip, system-on-chip, or the like.
An embodiment of this application further provides a computer program product, where the computer program product is stored in a non-transitory storage medium. When the computer program product is executed by at least one processor, the processes of the foregoing method embodiment in
It should be noted that in this specification, the terms “include” and “comprise”, or any of their variants are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements not only includes those elements but also includes other elements that are not expressly listed, or further includes elements inherent to such process, method, article, or apparatus. In absence of more constraints, an element preceded by “includes a . . . ” does not preclude the existence of other identical elements in the process, method, article, or apparatus that includes the element. Furthermore, it should be noted that the scope of the method and apparatus in the implementations of this application is not limited to functions being performed in the order shown or discussed, but may further include functions being performed at substantially the same time or in a reverse order, depending on the functions involved. For example, the described method may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to some examples may be combined in other examples.
According to the description of the foregoing embodiments, persons skilled in the art can clearly understand that the method in the foregoing embodiments may be implemented by software in combination with a necessary general hardware platform. Certainly, the method in the foregoing embodiments may alternatively be implemented by hardware. However, in many cases, the former is a preferred embodiment. Based on such an understanding, the technical solutions of this application essentially or the part contributing to the prior art may be implemented in a form of a computer software product. The computer software product is stored in a storage medium (such as a ROM/RAM, a magnetic disk, or an optical disc), and includes several instructions for instructing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, a network device, or the like) to perform the methods described in the embodiments of this application.
Persons of ordinary skill in the art will appreciate that the units and algorithm steps of various examples described with reference to the embodiments disclosed in this specification can be implemented by using electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed by hardware or software depends on particular applications and design constraints of the technical solutions. Persons skilled in the art can employ a different method to implement the described functions for each particular application, but such implementations shall not be construed as going beyond the scope of this application.
It will be clearly understood by persons skilled in the art that, for ease and brevity of description, for a detailed operating process of the foregoing system, apparatus, or unit, reference may be made to a corresponding process in the foregoing method embodiments, and details are not described herein again.
In the embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the described apparatus embodiment is merely an example. For example, the unit division is merely logical function division and may be other division in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or may not be performed. In addition, the displayed or discussed mutual couplings, direct couplings or communication connections may be indirect couplings or communication connections through some interfaces, apparatuses or units, and may be in electrical, mechanical, or other forms.
The units described as separate parts may or may not be physically separate. Parts displayed as units may or may not be physical units, meaning they may be located in one position or distributed on a plurality of network units. Some or all of the units may be selected depending on actual requirements to achieve the objectives of the solutions of the embodiments.
In addition, function units in the embodiments of the present disclosure may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit.
When the functions are implemented in a form of a software functional unit and sold or used as an independent product, the functions may be stored in a computer-readable medium. Based on such an understanding, the technical solutions of the application substantially or parts making contributions to the related art or part of the technical solutions may be embodied in form of software product, and the computer software product is stored in a storage medium, including a plurality of instructions configured to enable a computer device (which may be a personal computer, a server, a network device or the like) to execute all or part of the steps of the method in each embodiment of the application. The foregoing storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disc.
A person of ordinary skill in the art may understand that all or some of the processes of the methods in the embodiments may be implemented by a computer program controlling relevant hardware. The program may be stored in a computer readable storage medium. When the program runs, the processes of the method embodiments may be included. The storage medium may be a magnetic disk, an optical disc, a ROM, a RAM, or the like.
The foregoing describes the embodiments of this application with reference to the accompanying drawings. However, this application is not limited to the foregoing specific embodiments. The foregoing specific embodiments are merely illustrative rather than restrictive. As instructed by this application, persons of ordinary skill in the art may develop many other manners without departing from principles of this application and the protection scope of the claims, and all such manners fall within the protection scope of this application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110340904.9 | Mar 2021 | CN | national |
The present application is a continuation application of International Application No. PCT/CN2022/082467, filed on Mar. 23, 2022. International Application No. PCT/CN2022/082467 claims priority to Chinese Patent Application No. 202110340904.9, filed in China on Mar. 30, 2021. Each of the above-listed applications is incorporated herein by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2022/082467 | Mar 2022 | US |
| Child | 18476664 | US |
