CN116980970A - Channel feedback method and device and computer readable storage medium - Google Patents

Channel feedback method and device and computer readable storage medium Download PDF

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Publication number
CN116980970A
CN116980970A CN202210411711.2A CN202210411711A CN116980970A CN 116980970 A CN116980970 A CN 116980970A CN 202210411711 A CN202210411711 A CN 202210411711A CN 116980970 A CN116980970 A CN 116980970A
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China
Prior art keywords
state information
channel state
cells
service cells
common channel
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Chinese (zh)
Inventor
邓云
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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Priority to CN202210411711.2A priority Critical patent/CN116980970A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows

Abstract

A channel feedback method and device, computer readable storage medium, the channel feedback method includes: acquiring channel state information corresponding to N service cells; if the channel state information corresponding to the N service cells can be represented by using one common channel state information, reporting the common channel state information; n is more than or equal to 2. By adopting the scheme, the UE can adopt one common channel state information to represent the channel state information of a plurality of service cells, and the access network equipment can adopt one DCI to schedule the plurality of service cells, so that the reporting efficiency and the scheduling efficiency of the channel state information are improved.

Description

Channel feedback method and device and computer readable storage medium
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a channel feedback method and apparatus, and a computer readable storage medium.
Background
In a mobile communication system, in order to improve data transmission efficiency, an appropriate transmission parameter is selected based on channel quality. Typically, the access network device configures the UE to report channel state information. In a carrier aggregation scenario, the UE may be configured to report channel state information for all serving cells.
When the UE reports the channel state information corresponding to each serving cell, the UE needs to report the channel state information of each serving cell, and the access network device needs to schedule each serving cell for the channel state information of each serving cell. The UE reports the channel state information and the scheduling efficiency corresponding to the base station is low.
Disclosure of Invention
The embodiment of the invention solves the technical problems that the channel state information reported by the UE and the corresponding scheduling efficiency of the access network equipment are low.
In order to solve the above technical problems, an embodiment of the present invention provides a channel feedback method, including: acquiring channel state information corresponding to N service cells; if the channel state information corresponding to the N service cells can be represented by using one common channel state information, reporting the common channel state information; n is more than or equal to 2.
Optionally, the channel feedback method further includes: if the channel state information corresponding to the N service cells cannot be represented by using one common channel state, reporting the channel state information corresponding to the N service cells respectively.
Optionally, the channel feedback method further includes: if the channel state information corresponding to the N service cells cannot be represented by using one common channel state, but the channel state information corresponding to the M service cells can be represented by using one common channel state information, reporting the common channel state information and the channel state information corresponding to other N-M service cells.
Optionally, after reporting the common channel status information, the method further includes: detecting downlink control information on different search space sets; and the downlink control information on the different search space sets is used for scheduling the corresponding number of service cells, and the bit length corresponding to the downlink control information is positively correlated with the number of the scheduled service cells.
The detecting downlink control information on different search space sets includes: if the sum of the blind detection times of the downlink control information corresponding to the different search space sets exceeds the maximum processing capacity, sequentially detecting K search space sets in the different search space sets according to the sequence from high to low of the number of the scheduling service cells; k is less than N.
Optionally, after reporting the common channel status information, the method further includes: and determining a search space set to be detected according to the number of the service cells adopting the public channel state information.
Optionally, after reporting the common channel status information, the method further includes: and adjusting the sequence of the search space set to be detected according to the number of the service cells adopting the public channel state information.
Optionally, the maximum carrier number of downlink control information scheduling in the search space set to be detected is equal to the number of serving cells adopting the common channel state information.
The embodiment of the invention also provides another channel feedback method, which comprises the following steps: receiving common channel state information; the public channel state information is used for representing the channel state information of N service cells; n is more than or equal to 2; and generating and issuing downlink control information, wherein the downlink control information is used for scheduling part or all of the N service cells.
Optionally, the channel feedback method further includes: and if the public channel state information is not received, scheduling the N service cells in a mode of scheduling one service cell by adopting one downlink control information.
Optionally, the generating downlink control information further includes: if only the channel state information of M service cells among the N service cells can be represented by using one common channel state information, generating downlink control information corresponding to all or part of the M service cells.
Optionally, the generating downlink control information includes: generating downlink control information with corresponding bit length according to the number of service cells adopting the common channel state information; and the bit length corresponding to the downlink control information is related to the number of the scheduled service cells.
Optionally, the channel feedback method further includes: and determining the number X of the service cells scheduled by the downlink control information according to the data quantity to be transmitted, wherein X is less than or equal to N.
The embodiment of the invention also provides a channel feedback device, which comprises: the acquisition unit is used for acquiring the channel state information corresponding to the N service cells; a reporting unit, configured to report the common channel state information when the channel state information corresponding to the N serving cells can be represented by using one common channel state information; n is more than or equal to 2.
The embodiment of the invention also provides another channel feedback device, which comprises: a receiving unit that receives common channel state information; the public channel state information is used for representing the channel state information of N service cells; n is more than or equal to 2; and the generation and issuing unit is used for generating and issuing the downlink control information.
The embodiment of the invention also provides a computer readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to execute the steps of any one of the channel feedback methods.
The embodiment of the invention also provides another channel feedback device, which comprises a memory and a processor, wherein the memory stores a computer program which can be run on the processor, and the processor executes the steps of any one of the channel feedback methods when running the computer program.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
and the UE reports the public channel state information and adopts one public channel state information to represent the channel state information of a plurality of service cells. After receiving the public channel state information, the access network device can use one DCI to schedule a plurality of service cells, thereby improving the reporting efficiency of the channel state information and the scheduling efficiency of the access network device.
Drawings
Fig. 1 is a flow chart of a channel feedback method in an embodiment of the invention;
FIG. 2 is a flow chart of another channel feedback method in an embodiment of the invention;
fig. 3 is a schematic structural diagram of a channel feedback device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another channel feedback device in an embodiment of the present invention.
Detailed Description
In the prior art, one downlink control information (Downlink Control Information, DCI) may schedule uplink and downlink data transmission of a plurality of serving cells. One possible processing method is that the DCI contains independent uplink and downlink transmission parameters of each cell; another possible processing method is that one DCI includes uplink and downlink transmission parameters common to a plurality of cells, such as a common modulation coding scheme (Modulation and Coding Scheme, MCS) applicable to a plurality of serving cells.
However, when the DCI carries uplink and downlink parameters common (identical) to a plurality of cells, the existing channel state information feedback mechanism cannot be applied. For example, the UE measures that the CQI of a certain serving cell is higher, and the CQI of another serving cell is lower, and at this time, the access network device cannot select an appropriate common MCS and PMI (Precoding matrix indicator, precoding matrix indication) to provide services for UE transmission, which results in that the UE reports channel state information and the corresponding scheduling efficiency of the base station is lower.
In the embodiment of the invention, the UE reports the common channel state information, and the channel state information of a plurality of service cells is represented by adopting one common channel state information. After receiving the public channel state information, the access network device can use one DCI to schedule a plurality of service cells, thereby improving the reporting efficiency of the channel state information and the scheduling efficiency of the access network device.
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
The embodiment of the invention provides a channel feedback method, and the detailed description is given below through specific steps with reference to fig. 1.
In the embodiment of the present invention, the channel feedback methods corresponding to the following steps S101 to S102 may be executed by a chip (e.g., a baseband chip) having a data processing function in the UE; alternatively, the method may be performed by a chip module in the UE, where the chip module includes the chip with the data processing function.
Step S101, obtaining channel state information corresponding to N service cells.
In implementations, a UE accesses a primary cell (PCell) and establishes a radio resource control (Radio Resource Control, RRC) connection. After the RRC connection is completed, a data radio bearer is established and data transmission starts.
The access network device may learn service requirements and capability information of the UE, and configure N serving cells for the UE. The N serving cells may include one primary cell and N-1 secondary cells. The access network device may also configure reporting configuration of channel state information for the UE, so that the UE reports channel state information of different serving cells, such as reporting content and time-frequency resources occupied when reporting channel state information.
In the embodiment of the invention, the UE can obtain the channel state information corresponding to the N service cells by measurement according to the configuration of the access network equipment. The channel state information may include one or more of a channel quality indication (Channel Quality Iindicator, CQI), a precoding matrix indication (Precoding Matrix Indicator, PMI), a Rank Indicator (RI), and the like.
Specifically, the specific process of acquiring the channel state information of the plurality of serving cells by the UE may refer to the existing protocol, and the embodiments of the present invention are not described in detail.
Step S102, if the channel state information corresponding to the N service cells can be represented by using one piece of common channel state information, reporting the common channel state information.
In a specific implementation, after the UE obtains the channel state information corresponding to each of the N serving cells, it may be determined whether the channel state information of the N serving cells meets a convergence criterion, that is, whether the channel state information of the N serving cells may be described by using one common channel state information.
If the channel state information of the N service cells can be represented by one common channel state information, reporting the common channel state information. At this time, one common channel state information is used to characterize the channel state information of the N serving cells.
Therefore, the UE only needs to report one common channel state information, and does not need to report the channel state information corresponding to N service cells one by one, so that the uplink signaling overhead can be effectively saved. Note that the common channel state information may include one or more of channel quality indication (Channel Quality Iindicator, CQI), precoding matrix indication (Precoding Matrix Indicator, PMI), rank Indicator (RI), and the like.
In the embodiment of the present invention, the common channel state information may refer to: each service cell uses the channel state information to implement scheduling, and then data transmission is carried out, and the corresponding transmission effect can meet the preset requirement. The preset requirement can be a requirement capable of meeting a normal communication function, and the corresponding indexes such as transmission capacity loss, bit error rate and the like are all within a tolerable range.
For example, serving cell1 corresponds to channel state information 1, and serving cell2 corresponds to channel state information 2. If the transmission capacity of the serving cell1 when the UE is scheduled using the channel state information 2 is 95% of the transmission capacity of the UE when the UE is scheduled using the channel state information 1, the error rate of the serving cell is 3% higher than that of the serving cell when the UE is scheduled using the channel state information 2. The preset requirement is that the transmission capacity is lost by 10%, and the error rate is less than 5%. Thus, it can be determined that serving cell1 and serving cell2 can be represented by common channel state information.
In the embodiment of the invention, if the common channel state information only includes CQI, and the difference between the CQI corresponding to the N serving cells is within a preset range, it can be determined that the channel state information corresponding to the N serving cells can be represented by the common channel state information, and one CQI can be selected as the common channel state information, or the average value of the N CQIs is used as the common channel state information and reported.
If the UE reports the common channel state information, the access network device may use the common channel state information to schedule N serving cells after receiving the common channel state information. The access network device may use one DCI to schedule some or all of the N serving cells to perform uplink and/or downlink data transmission with the UE.
In a specific implementation, if the channel state information corresponding to the N serving cells cannot be represented by one common channel state information, the channel state information of the N serving cells may be reported for the N serving cells. After receiving the common channel state information of the N service cells, the access network device adopts one DCI schedule for each service cell.
That is, if there is a scheduling requirement, N DCI schedules may be employed for N serving cells.
In a specific implementation, when the channel state information corresponding to N serving cells cannot be represented by one common channel state information, there may be M serving cells whose channel state information can be represented by one common channel state information, but the channel state information of the remaining N-M serving cells cannot be represented by the common channel state information. In this case, the UE may report common channel state information, which is used to characterize channel state information of M serving cells. In addition, the UE can report the channel state information of other N-M service cells independently.
After receiving the common channel state information and the channel state information of the N-M service cells, the access network device adopts one DCI to schedule the transmission resources of the M service cells for the M service cells reported by the common channel state information. For N-M service cells which do not adopt public channel state information to report, if scheduling demands exist, N-M DCIs can be adopted to respectively schedule transmission resources of a plurality of service cells.
For example, n=4, m=3. The channel state information of the serving cells SCell1, SCell2, SCell3 may be represented by common channel state information. The serving cell SCell4 cannot be represented by this common channel state information. The access network device uses one DCI to schedule (the transmission resources of) SCell1, SCell2, SCell3, and another DCI to schedule (the transmission resources of) SCell 4.
It should be noted that, in a specific application, as the wireless channel environment changes, the channel state information of the serving cell acquired by the UE at different times may change. For example, at time T0, channel state information in which only M serving cells exist among N serving cells may be represented by common channel state information. However, at time T1, the channel state information of the N serving cells may be represented by common channel state information.
For the application scenario, for scheduling at the time T0, the access network device may use one DCI to schedule M serving cells whose channel state information is represented by common channel state information, and use N-M DCIs to schedule N-M remaining serving cells respectively. For scheduling at time T1, the access network device may use one DCI to schedule N serving cells whose channel state information is indicated by common channel state information.
That is, in the embodiment of the present invention, the scheduling of the access network device may be adjusted accordingly with time.
The channel feedback method provided in the above-described embodiments of the present invention will be described by way of specific examples.
The UE accesses a primary cell (PCell), establishes a data radio bearer, and performs data transmission. Considering the service requirement and capability information of the UE, the UE is configured with 5 serving cells, in order: PCell, and 4 secondary cell scells (SCell 1, SCell2, SCell3, and SCell4 in order).
The access network equipment configures reporting configuration of channel state information for the UE, and the reporting configuration is used for indicating the UE to report the channel state information (reported contents) of different service cells and video positions of resources occupied when the channel state information is reported.
In this embodiment, the access network device may first configure whether the UE may use the common channel state information for channel feedback, and/or configure which service cells may use the common channel state information for channel feedback, and default for all the service cells or all activated service cells if the access network device only configures which service cells may use the common channel state information for feedback.
Here, taking an example that the access network device configures the UE to perform feedback by using common channel state information for 4 secondary cells, after the UE receives the configuration information, the UE determines whether the channel state information corresponding to the 4 secondary cells can be represented by using the common channel state information. The conditions represented by the common channel state information are: in the channel state information corresponding to the 4 auxiliary cells, the difference value between the CQI corresponding to any two auxiliary cells is within a preset difference threshold, or the difference value between the CQI corresponding to any one auxiliary cell and the common channel state information is within the preset difference threshold.
If the UE detects that the CQI corresponding to the 4 auxiliary cells can be represented by the common channel state information, the UE can report the common channel state information. After receiving the common channel state information, the access network device can use one DCI to schedule 4 secondary cells and the UE to transmit uplink and/or downlink data according to the common channel state information.
Otherwise, if the UE detects that CQIs corresponding to the 4 secondary cells cannot be represented by the common channel state information, that is, a difference between CQIs corresponding to at least two secondary cells is greater than a preset difference threshold, one scheme is as follows: in the first scheme, the UE may report the CQIs of the 4 secondary cells respectively.
At this time, the access network device performs scheduling of transmission resources by adopting a mode of scheduling one serving cell by one DCI according to CQIs corresponding to the four secondary cells. That is, for 4 secondary cells, the access network device employs 4 DCI schedules.
If the UE detects that CQIs corresponding to the 4 secondary cells cannot be represented by the common channel state information, that is, a difference between CQIs corresponding to at least two secondary cells is greater than a preset difference threshold, another scheme is that: in the second scheme, if, among the CQIs corresponding to the 4 secondary cells, CQIs corresponding to 3 secondary cells (SCell 1, SCell2, SCell 3) may be represented by common channel state information, and when the common channel state information is reported, the CQI corresponding to SCell1, SCell2, SCell3 is represented by the common channel state information, and at this time, the UE needs to indicate not only the common channel state information but also the cell information of SCell1, SCell2, SCell3 when reporting; and reporting the CQI corresponding to the SCell4 independently.
At this time, the access network device uses one DCI to schedule 3 secondary cells (SCell 1, SCell2, SCell 3) and UE to transmit uplink and/or downlink data at the same time according to the common channel state information, and uses another DCI to schedule secondary cell SCell4 and UE to transmit uplink and downlink data.
It should be noted that in a specific application, the channel quality of the wireless channel is time-varying. For example, at time T0, the UE evaluates that CQIs corresponding to 4 secondary cells cannot be represented by common channel state information, but CQIs corresponding to 3 secondary cells among them can be represented by common channel state information. At time T1, the UE evaluates that CQIs corresponding to the 4 secondary cells may be represented by common channel state information.
In the embodiment of the invention, aiming at the scene, the CQI reporting strategy can be dynamically adjusted in real time. Specifically, if the CQIs corresponding to the 4 secondary cells can be represented by the common channel state information, reporting the common channel state information; if CQIs corresponding to the 4 secondary cells cannot be represented by common channel state information, the above scheme one or scheme two may be performed.
It can be seen that the UE reports the common channel state information, and uses one common channel state information to characterize the channel state information of multiple serving cells. After receiving the common channel state information, the access network device can use one DCI to schedule part or all of the plurality of service cells, thereby improving the reporting efficiency of the channel state information and the scheduling efficiency of the access network device.
In a specific implementation, after reporting the common channel status information, the UE may also detect DCI on different search space sets.
The access network device may employ DCI to schedule different numbers of serving cells at different times. When the bit length of the DCI varies with the number of serving cells scheduled, the access network device may configure different sets of search spaces to schedule DCI for different numbers of serving cells. The UE may detect DCI on different search space sets, obtain a bit length of the DCI, and further determine the number of serving cells that the DCI corresponds to scheduling.
In the embodiment of the invention, DCIs on different search space sets can be used for scheduling corresponding number of service cells, and the bit length corresponding to the DCIs is positively correlated with the number of the service cells scheduled by the DCIs.
For example, when the bit length of the DCI is 30 bits, the number of corresponding scheduling serving cells is 2; when the bit length of DCI is 35 bits, the number of corresponding dispatch service cells is 3; when the bit length of the DCI is 40 bits, the number of corresponding scheduling service cells is 4.
Thus, the UE can determine the number of serving cells scheduled by the DCI according to the acquired DCI length.
The number of times the UE detects DCI in one slot is limited, which generally depends on the UE's capability. The number of times the access network device can configure the UE to detect downlink control information in different search space sets in one slot according to the capability of the UE is also called DCI Blind Detection (PDCCH Detection, or Blind Detection) number of times. In general, the UE may detect its corresponding DCI (e.g., DCI scrambling its corresponding C-RNTI) in different search space sets based on the configuration of the access network device.
In the embodiment of the invention, since the UE can report whether the content of the common channel state information can be used by the plurality of service cells and the number of the service cells corresponding to the common channel state information used by the UE at different times may be different, the UE can also determine the search space set to be detected and/or adjust the search sequence of the search space set to be detected according to the number of the service cells corresponding to the reported common channel state information.
In the embodiment of the invention, the maximum carrier wave number of DCI scheduling in the search space set which needs to be detected by the UE can be equal to the number of the serving cells which are represented by the common channel state information. In an embodiment, when the access network device configures a search space set, the number of serving cells corresponding to the search space set, that is, the number of serving cells scheduled by DCI in the search space set may be indicated by using an identifier of the serving cell, and if the serving cells scheduled by DCI in the search space set are SCell1 and SCell2, this means that the number of serving cells scheduled by DCI in the search space set is 2.
The access network device configures parameters such as a detection period, a detection position in the detection period, a detected DCI format (format), a convergence rank (Aggregation Level) of the detected DCI, a detection number (nrofCandidates) and the like of the UE in one search space set.
On one serving cell, the access network device configures five search space sets as follows:
the DCI format to be detected by the ue is DCI 0_1 (uplink scheduling), the DCI size to be detected is X1 bits (scheduling corresponding to 1 carrier, when only one carrier is scheduled, X1 may not be indicated), and the detection number is 8;
the Search space set 2, the DCI format to be detected by the UE is DCI 0_1 (uplink scheduling), the DCI size to be detected is X2 bits (scheduling corresponding to 2 carriers), and the detection times are 6 times;
the Search space set 3, the DCI format to be detected by the ue is DCI 0_1 (uplink scheduling), the DCI size to be detected is X3 bits (scheduling corresponding to 3 carriers), and the detection times are 4 times;
the Search space set 4, the DCI format to be detected by the ue is DCI 0_1 (uplink scheduling), the DCI size to be detected is X4 bits (scheduling corresponding to 4 carriers), and the detection times are 4 times;
the DCI format to be detected by the ue is DCI 1_1 (downlink scheduling), the DCI size to be detected is X5 bits (scheduling corresponding to 1 carrier, when only one carrier is scheduled, X5 may not be indicated), and the number of detections is 8.
In the uplink scheduling process, at time T0, the UE detects that 4 secondary cells cannot be represented by common channel state information, and the UE reports the channel state information of the 4 serving cells respectively. The UE listens to the Search space set 1 and the Search space set 5. After a period of time, the UE detects that 3 serving cells may be represented by common channel state information, and reports the common channel state information corresponding to the 3 serving cells in the time slot n, and modifies the search space set monitored by DCI. At this time, the UE needs to listen to the Search space set 3 and the Search space set 5.
It should be noted that, considering the processing time of the access network device, the UE modifies the search space set monitored by the DCI in the time slot n+k, where the value of k is a fixed value. k has a value of 2 or 3 or other values.
Accordingly, at other moments, after the UE detects that other numbers of serving cells can be represented by using the common channel state information and report the common channel state information, the search space set monitored by the DCI can be correspondingly modified, so that the scheduling of the access network device can be responded quickly.
In a specific implementation, the common channel state information reported by the UE characterizes channel state information corresponding to a plurality of serving cells. The access network device may also consider the size of the data volume actually required to be transmitted when scheduling, and determine to schedule several serving cells by using one DCI according to the size of the data volume. If the data quantity to be transmitted is large, the access network equipment can adopt one DCI to schedule a large number of service cells; if the amount of data to be transmitted is smaller, the access network device may use one DCI to schedule a smaller number of serving cells.
That is, the number of serving cells for DCI scheduling in the search space set that the UE needs to detect is not greater than the number of serving cells corresponding to the common channel state information.
For example, the common channel state information characterizes channel state information corresponding to 4 serving cells. The access network equipment determines to schedule 3 service cells according to the data quantity required to be transmitted. The access network device adopts one DCI to schedule the transmission resources of 3 service cells.
When the UE detects different search space sets, if the sum of monitoring times corresponding to the different search space sets exceeds the current maximum processing capacity of the UE, K search space sets in the different search space sets can be sequentially detected according to the sequence of the number of the dispatching service cells from high to low, wherein K is smaller than N. That is, if the sum of the listening times corresponding to the different search space sets exceeds the current maximum processing capability of the UE, only part of the search space sets in the different search space sets may be detected.
The configuration of the set of search spaces configured by the access network device is as exemplified above. The UE is configured with 5 serving cells, in order: PCell, and 4 secondary cell scells (SCell 1, SCell2, SCell3, and SCell4 in order).
And the UE reports the common channel state information adopted by the 4 auxiliary cells. The access network device also needs to consider the size of the data volume actually required to be transmitted during scheduling. If the amount of data to be transmitted is large, one DCI can be used to schedule a plurality of secondary cells. For example, 4 secondary cells are scheduled using one DCI.
Accordingly, if the amount of data to be transmitted is small, one DCI may be used to schedule less secondary cells, instead of scheduling 4 secondary cells. That is, the number of serving cells that the UE needs to monitor in the search space set DCI may schedule is not greater than the number of serving cells that employ common channel state information.
For example, 2 secondary cells are scheduled using one DCI; alternatively, 3 secondary cells are scheduled using one DCI.
Suppose that the UE needs to listen to the Search space set 1, the Search space set 2, the Search space set 3, the Search space set 4, and the Search space set 5. The UE finds that the simultaneous detection of 5 Search space sets exceeds the maximum processing capacity of the UE, and preferentially detects Search space sets corresponding to DCI with a plurality of scheduling service cells, such as Search space set 2, search space set 3, search space set 4 and Search space set 5; or detecting the Search space set 3, the Search space set 4, and the Search space set 5. The Search space set 5 is always detected because the downlink scheduling is necessary, and thus the UE needs to detect at least one Search space set related to the downlink scheduling. If the downlink scheduling also has a plurality of search space sets, and different search space sets can schedule different service cell numbers, the UE can also preferentially detect the search space set corresponding to DCI with a plurality of scheduled service cell numbers.
The embodiment of the invention also provides another channel feedback method, and the detailed description is given below through specific steps with reference to fig. 2.
In the embodiment of the present invention, the channel feedback methods corresponding to the following steps S201 to S202 may be executed by a chip having a data processing function in the access network device; alternatively, the method may be performed by a chip module in the access network device, where the chip module includes the chip with the data processing function.
Step S201, common channel state information is received.
In a specific implementation, after the UE acquires the channel state information corresponding to the N serving cells, it may be determined whether the channel state information of the N serving cells meets a convergence criterion, that is, whether the channel state information of the N serving cells may be described by using one common channel state information.
If the channel state information of the N service cells can be represented by one common channel state information, reporting the common channel state information. At this time, one piece of common channel state information is adopted to represent the channel state information of N service cells; n is more than or equal to 2.
In the embodiment of the present invention, the common channel state information may refer to: each service cell uses the channel state information to implement scheduling, and then data transmission is carried out, and the corresponding transmission effect can meet the preset requirement. The preset requirement can be a requirement capable of meeting a normal communication function, and the corresponding indexes such as transmission capacity loss, bit error rate and the like are all within a tolerable range.
In the embodiment of the present invention, the specific process how the UE selects the common channel state information and the process that the UE reports the common channel state information may be referred to the above steps S101 to S102 correspondingly, which is not described herein.
Step S202, generating DCI and issuing.
In a specific implementation, after receiving the common channel state information, the access network device may generate a corresponding DCI and issue the DCI to the UE.
In a specific implementation, if the access network device does not receive the common channel state information, the access network device may issue DCI corresponding to the N serving cells one to one respectively for the N serving cells.
In a specific implementation, if, among the N serving cells, only the channel state information of M serving cells satisfies the common channel state information reporting condition, the access network device may generate DCI corresponding to the scheduling M serving cells, and N-M DCI (if there is a scheduling requirement) for scheduling the serving cells that do not satisfy the common channel state information reporting condition.
In a specific implementation, the access network device may generate DCI with a corresponding bit length according to the number of serving cells scheduled by the common channel state information. Bit length corresponding to DCI and number of service cells scheduled by DCI
In a specific implementation, the access network device may determine, according to the amount of data to be transmitted, the number X of serving cells scheduled by DCI, where X is less than or equal to N.
In specific implementation, the specific execution process of the steps S201 to S202 may correspond to the embodiment described above, and the description of the embodiment of the present invention is omitted here.
Referring to fig. 3, a channel feedback device 30 according to an embodiment of the present invention is provided, including: an acquisition unit 301, a reporting unit 302, wherein:
an acquiring unit 301, configured to acquire channel state information corresponding to N serving cells;
a reporting unit 302, configured to report the common channel state information when the channel state information corresponding to the N serving cells can be represented by using one common channel state information; n is more than or equal to 2.
In a specific implementation, the specific execution process of the acquiring unit 301 and the reporting unit 302 may refer to the steps S101 to S102 correspondingly, which is not described herein.
In a specific implementation, the channel feedback device 30 may correspond to a chip with a data processing function in the UE; or corresponds to a chip module including a chip having a data processing function in the UE, or corresponds to the UE.
Referring to fig. 4, a channel feedback device 40 according to an embodiment of the present invention is provided, including: a receiving unit 401 and a generating and issuing unit 402, wherein:
a receiving unit 401 that receives common channel state information; the public channel state information is used for representing the channel state information of N service cells; n is more than or equal to 2;
a generation and issue unit 402, configured to generate and issue downlink control information.
In specific implementation, the specific execution process of the receiving unit 401 and the generating and issuing unit 402 may refer to the above steps S201 to S202 correspondingly, which is not described herein.
In a specific implementation, the channel feedback device 40 may correspond to a chip with a data processing function in the access network device; or corresponds to a chip module in the access network device comprising a chip with data processing functions, or corresponds to the access network device.
The embodiment of the invention also provides a computer readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to execute the steps of the channel feedback method provided by any embodiment.
The embodiment of the invention also provides a channel feedback device, which comprises a memory and a processor, wherein the memory is stored with a computer program which can run on the processor, and the processor executes the steps of the channel feedback method provided by the steps S101 to S102 when running; or, the channel feedback method provided in the above steps S201 to S202 is performed.
In a specific implementation, regarding each apparatus and each module/unit included in each product described in the above embodiments, it may be a software module/unit, or a hardware module/unit, or may be a software module/unit partially, or a hardware module/unit partially.
For example, for each device or product applied to or integrated on a chip, each module/unit included in the device or product may be implemented in hardware such as a circuit, or at least part of the modules/units may be implemented in software program, where the software program runs on a processor integrated inside the chip, and the rest (if any) of the modules/units may be implemented in hardware such as a circuit; for each device and product applied to or integrated in the chip module, each module/unit contained in the device and product can be realized in a hardware manner such as a circuit, different modules/units can be located in the same component (such as a chip, a circuit module and the like) or different components of the chip module, or at least part of the modules/units can be realized in a software program, the software program runs on a processor integrated in the chip module, and the rest (if any) of the modules/units can be realized in a hardware manner such as a circuit; for each device, product, or application to or integrated with the terminal, each module/unit included in the device, product, or application may be implemented by using hardware such as a circuit, different modules/units may be located in the same component (for example, a chip, a circuit module, or the like) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program, where the software program runs on a processor integrated inside the terminal, and the remaining (if any) part of the modules/units may be implemented by using hardware such as a circuit.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the above embodiments may be implemented by a program that instructs related hardware, the program may be stored on a computer readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, etc.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims (17)

1. A channel feedback method, comprising:
acquiring channel state information corresponding to N service cells;
if the channel state information corresponding to the N service cells can be represented by using one common channel state information, reporting the common channel state information, wherein N is more than or equal to 2.
2. The channel feedback method of claim 1, further comprising: if the channel state information corresponding to the N service cells cannot be represented by using one common channel state information, reporting the channel state information corresponding to the N service cells respectively.
3. The channel feedback method of claim 1, further comprising: if the channel state information corresponding to the N serving cells cannot be represented by using one common channel state information, but the channel state information corresponding to the M serving cells can be represented by using one common channel state information, reporting the common channel state information and the channel state information corresponding to other N-M serving cells.
4. A channel feedback method as claimed in any one of claims 1 to 3, further comprising, after reporting the common channel state information:
detecting downlink control information on different search space sets; and the downlink control information on the different search space sets is used for scheduling the corresponding number of service cells, and the bit length corresponding to the downlink control information is positively correlated with the number of the scheduled service cells.
5. The channel feedback method of claim 4, wherein detecting downlink control information on different sets of search spaces comprises:
if the sum of the blind detection times of the downlink control information corresponding to the different search space sets exceeds the maximum processing capacity, sequentially detecting K search space sets in the different search space sets according to the sequence from high to low of the number of the scheduling service cells; k is less than N.
6. A channel feedback method as claimed in any one of claims 1 to 3, further comprising, after reporting the common channel state information:
and determining a search space set to be detected according to the number of the service cells adopting the public channel state information.
7. The channel feedback method of claim 6, further comprising, after determining the set of search spaces to detect:
and adjusting the sequence of the search space set to be detected according to the number of the service cells adopting the public channel state information.
8. The channel feedback method of claim 6 wherein the maximum number of carriers scheduled by downlink control information in the search space set to be detected is equal to the number of serving cells using the common channel state information.
9. A channel feedback method, comprising:
receiving common channel state information; the public channel state information is used for representing the channel state information of N service cells; n is more than or equal to 2;
and generating and issuing downlink control information, wherein the downlink control information is used for scheduling part or all of the N service cells.
10. The channel feedback method of claim 9, further comprising: and if the public channel state information is not received, scheduling the N service cells in a mode of scheduling one service cell by adopting one downlink control information.
11. The channel feedback method of claim 9, wherein the generating downlink control information further comprises:
if only the channel state information of M service cells among the N service cells can be represented by using one common channel state information, generating downlink control information corresponding to all or part of the M service cells.
12. The channel feedback method according to any one of claims 9 to 11, wherein the generating downlink control information includes:
generating downlink control information with corresponding bit length according to the number of service cells adopting the common channel state information; and the bit length corresponding to the downlink control information is related to the number of the scheduled service cells.
13. The channel feedback method of claim 12, further comprising:
and determining the number X of the service cells scheduled by the downlink control information according to the data quantity to be transmitted, wherein X is less than or equal to N.
14. A channel feedback apparatus, comprising:
the acquisition unit is used for acquiring the channel state information corresponding to the N service cells;
a reporting unit, configured to report the common channel state information when the channel state information corresponding to the N serving cells can be represented by using one common channel state information; n is more than or equal to 2.
15. A channel feedback apparatus, comprising:
a receiving unit that receives common channel state information; the public channel state information is used for representing the channel state information of N service cells; n is more than or equal to 2;
and the generating unit is used for generating and transmitting the downlink control information.
16. A computer readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having stored thereon a computer program, characterized in that the computer program when being executed by a processor performs the steps of the channel feedback method according to any of claims 1-13.
17. An apparatus comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, wherein the processor performs the steps of the channel feedback method of any of claims 1-9 when the computer program is executed; alternatively, the steps of the channel feedback method of any of claims 10-13 are performed.
CN202210411711.2A 2022-04-19 2022-04-19 Channel feedback method and device and computer readable storage medium Pending CN116980970A (en)

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