JP6288165B2 - Method and apparatus for triggering aperiodic feedback during CoMP transmission - Google Patents

Description

  The present invention relates to a transmission technique in a communication system, and more particularly, to a trigger method and apparatus for supporting aperiodic feedback of CoMP transmission in an LTE-A system.

  In LTE-A (Long Term Evolution-Advanced) systems, CoMP (Coordinated Multiple Points) transmission technology has been introduced to enhance the performance of users at the cell boundaries and at the same time improve the average cell throughput. In LTE-A 11, downlink CoMP technology is divided into the following three types: Joint transmission (Joint Transmission, JT), Dynamic transmission point selection (Dynamic Point Selection), Coordinated Scheduling / Beamforming. ) Is standardized. In order to be able to perform link self-adaptive transmission accurately and acquire the gain of CoMP transmission effectively, the user side (UE, User Equipment) is able to perform accurate PMI (Preceding Matrix Indicator) for different transmission provisions (assumed). ) / CQI (Channel Quality Indication) / RI (Rank Indication) information needs to be fed back. In the 3GPP RAN1 67 conference, at least a feedback scheme that supports each CSI-RS (Channel State Indication-RS) resource is determined. In the 3GPP RAN1 68 conference, it has been determined that the CoMP measurement set supports up to three CSI-RS resources. Since mobile stations are limited by actual processing capabilities, the number of specific CSI reports may be further limited. In practice, there is a compromise between the cost of feedback and the performance gain of the system. A relatively large amount of feedback information is advantageous for the system to obtain the gain of CoMP transmission. On the other hand, it also increases the cost of uplink feedback.

  In LTE Rel.10 system, periodic and aperiodic feedback schemes are used to provide different granularity of feedback information to the base station and improve system performance. Aperiodic feedback has the advantage of large feedback capacity and small time delay, and can meet the needs of CoMP feedback. Therefore, it is necessary to design an effective trigger mechanism and support aperiodic feedback during CoMP transmission.

At present, aperiodic feedback is triggered by DCI (Dynamic Control Information). When multi-carrier transmission is not configured in the user equipment, adopt 1-bit CSI request field in DCI format 0 or DCI format 4 to trigger aperiodic reporting of the corresponding mode; multi-carrier transmission is configured in the user equipment When used, it adopts a 2-bit CSI request field in DCI format 0 or DCI format 4 to trigger aperiodic reporting of the corresponding mode. As shown in Table 1, among them, 00 represents not triggering the report; 01 represents triggering the non-periodic report of the primary carrier; 10 and 11 are set 1 and Represents triggering a set 2 report. Among them, set 1 and set 2 are configured by higher layer signaling, and the upper layer signaling needs to report any of the 8 subcarriers by 8-bit bitmap information. Show. At present, the LTE-A system can support up to 5 subcarriers, so in practice up to 5 bits are set to 1, ie corresponding to the bits set to 1. Subcarriers need to be reported. It also supports 1-bit signaling triggers to meet DCI information length needs when aperiodic reporting is triggered in a common search space. Considering that carrier reconfiguration is an important scenario for transmitting DCI information using a common search space when multi-carrier transmission is configured in the user equipment, 1-bit triggered signaling is set to 1. When set, only the CSI information of the downstream carrier (defined in the system information block 2) corresponding to the upstream aperiodic feedback carrier trigger is fed back. Table 1 shows the meaning of the CSI field.

  The inventor discovered the following in the process of realizing the present invention. That is, the CSI information fed back by the user apparatus includes Rank Indication (RI), Precoding Matrix Indication (PMI), and Channel Quality Indication (CQI) information. The base station configures one non-zero power CSI-RS resource and interference partial measurement resource for each CSI, and the user measures and reports CSI using these resources. In CoMP transmission, it is necessary to report a plurality of CSI information (corresponding to different transmission points and interference provisions), so the cost (load) of feedback is very high.

  It should be noted that the introduction of the above-described background art is only for the purpose of clearly and completely explaining the technical solution of the present invention and allowing those skilled in the art to easily understand it. Since these technical solutions are described in the background section of the present invention, they should not be considered well known to those skilled in the art.

  An object of an embodiment of the present invention is to provide a non-periodic feedback of CoMP transmission in order to solve the problem of excessive loading of dynamic signaling of a system due to feedback of each CSI in a CoMP transmission process or a combined transmission process of CoMP and CA. It is an object to provide a trigger method and apparatus.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The base station transmits to the UE a dynamic control information (DCI) and a preconfigured feedback set corresponding to the DCI, so that the UE responds based on the DCI and the feedback set corresponding to the DCI. Performing aperiodic feedback of channel state information to
Among them, the preconfigured feedback set corresponding to the DCI is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; or interference Classification based on type.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
A user equipment (UE) receives a DCI transmitted by a base station and a preconfigured feedback set corresponding to the DCI; and
A UE performing aperiodic feedback of corresponding channel state information based on the DCI and a feedback set corresponding to the DCI;
Among them, the preconfigured feedback set corresponding to the DCI is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; or interference Classification based on type.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The base station transmits a first DCI and a preconfigured feedback set corresponding to the first DCI to the UE, so that the UE is based on the feedback set corresponding to the first DCI and the first DCI. Aperiodic feedback of the channel state information of the corresponding carrier aggregation (CA); and
The base station transmits to the UE a second DCI and a preconfigured feedback set corresponding to the second DCI, so that the UE is based on the feedback set corresponding to the second DCI and the second DCI. Performing aperiodic feedback of channel state information of the corresponding CoMP transmission;
Wherein, the preconfigured feedback set corresponding to the second DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; or Categorized based on interference type.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The UE receives the first DCI transmitted by the base station and a preconfigured feedback set corresponding to the first DCI;
The UE performs aperiodic feedback of the channel state information of the corresponding CA based on the first DCI and the feedback set corresponding to the first DCI;
The UE receives a second DCI transmitted by the base station and a preconfigured feedback set corresponding to the second DCI; and
The UE performs aperiodic feedback of channel state information of the corresponding CoMP based on the second DCI and a feedback set corresponding to the second DCI,
Wherein, the preconfigured feedback set corresponding to the second DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; or Categorized based on interference type.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The base station transmits to the UE a DCI and a pre-configured feedback set corresponding to the DCI, so that the UE responds to the corresponding CA and CoMP channels based on the DCI and the feedback set corresponding to the DCI. Including aperiodic feedback of state information,
Among them, the pre-configured feedback set corresponding to the DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI,
Among them, a preconfigured feedback set corresponding to the DCI is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit corresponding to each triggered transmission point or each configured CSI.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
A UE receives a DCI transmitted by a base station and a preconfigured feedback set corresponding to the DCI; and
The UE performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and a feedback set corresponding to the DCI;
Among them, the pre-configured feedback set corresponding to the DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI,
Among them, a preconfigured feedback set corresponding to the DCI is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit corresponding to each triggered transmission point or each configured CSI.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The base station transmits to the UE a DCI and a pre-configured feedback set corresponding to the DCI, so that the UE responds to the corresponding CA and CoMP channels based on the DCI and the feedback set corresponding to the DCI. Including aperiodic feedback of state information,
Among them, the pre-configured feedback set corresponding to the DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI,
Among them, a preconfigured feedback set corresponding to the DCI is indicated by RRC signaling, and the RRC signaling includes carrier indication bits for indicating a configured or activated carrier, and each configuration. Includes a TP indication bit for indicating a triggered TP or a CSI indication bit for indicating a configured CSI corresponding to a configured or activated carrier; or the RRC signaling is configured Or a carrier indication bit for indicating an activated carrier and a carrier indication bit for indicating corresponding to each triggered TP or configured CSI.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The UE receives the DCI transmitted by the base station and a preconfigured feedback set corresponding to the DCI; and
The UE performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and a feedback set corresponding to the DCI;
Among them, the pre-configured feedback set corresponding to the DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI,
Among them, a preconfigured feedback set corresponding to the DCI is indicated by RRC signaling, and the RRC signaling includes carrier indication bits for indicating a configured or activated carrier, and each configuration. Includes a TP indication bit for indicating a triggered TP or a CSI indication bit for indicating a configured CSI corresponding to a configured or activated carrier; or the RRC signaling is configured Or a carrier indication bit for indicating an activated carrier and a carrier indication bit for indicating corresponding to each triggered TP or configured CSI.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The base station transmits to the UE a DCI and a pre-configured feedback set corresponding to the DCI, so that the UE responds to the corresponding CA and CoMP channels based on the DCI and the feedback set corresponding to the DCI. Including aperiodic feedback of state information,
Wherein, the preconfigured feedback set corresponding to the DCI is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a pre-configured feedback set corresponding to the DCI is indicated by RRC signaling, and the RRC signaling is indicated by a carrier indication bit for indicating a triggered acyclic feedback carrier, and each triggered Includes a TP indication bit for indicating a triggered TP or a CSI indication bit for indicating a configured CSI corresponding to the selected carrier; or the RRC signaling includes a triggered aperiodic feedback carrier It includes a carrier indication bit for indicating and a carrier indication bit for indicating corresponding to each triggered TP or configured CSI.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The UE receives the DCI transmitted by the base station and a preconfigured feedback set corresponding to the DCI; and
The UE performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and a feedback set corresponding to the DCI;
Among them, the feedback set corresponding to the pre-configured DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a preconfigured feedback set corresponding to the DCI is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit for indicating a triggered aperiodic feedback carrier, and a triggered carrier. Or a CSI indication bit for indicating a configured CSI, or the RRC signaling indicates a triggered aperiodic feedback carrier corresponding to And a carrier indication bit for indicating corresponding to each triggered TP or configured CSI.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The base station transmits to the UE a DCI and a pre-configured feedback set corresponding to the DCI, so that the UE responds to the corresponding CA and CoMP channels based on the DCI and the feedback set corresponding to the DCI. Including aperiodic feedback of state information,
Wherein, the preconfigured feedback set corresponding to the DCI is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling corresponds to a carrier indication bit for indicating a triggered carrier and all triggered carriers. It includes a TP instruction bit or CSI instruction bit for indicating feedback contents.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The UE receives the DCI transmitted by the base station and a preconfigured feedback set corresponding to the DCI; and
The UE performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and a feedback set corresponding to the DCI;
Wherein, the preconfigured feedback set corresponding to the DCI is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling corresponds to a carrier indication bit for indicating a triggered carrier and all triggered carriers. It includes a TP instruction bit or CSI instruction bit for indicating feedback contents.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The base station transmits dynamic control information (DCI) to the UE, so that the UE can determine whether the corresponding channel state information is based on the DCI and the preset feedback execution information corresponding to the DCI. Including performing periodic feedback,
Among them, the preset feedback execution information corresponding to the DCI includes feedback of all CSIs of the first non-zero power CSI-RS resource or the first CSI of the aperiodic feedback CSI set. Or the first CSI of the triggered aperiodic feedback CSI set.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The UE receives dynamic control information (DCI) transmitted by the base station; and
The UE performs aperiodic feedback of the corresponding channel state information based on the DCI and preset feedback execution information corresponding to the DCI,
Among them, the preset feedback execution information corresponding to the DCI includes feedback of all CSIs of the first non-zero power CSI-RS resource or the first CSI of the aperiodic feedback CSI set. Or the feedback of the first CSI in the triggered aperiodic feedback CSI set.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The base station transmits dynamic control information (DCI) and a pre-configured anchor CSI resource to the UE, so that the UE aperiodic feedback of corresponding channel state information based on the DCI and the anchor CSI Including performing
Wherein the anchor CSI resource is at least one CSI resource corresponding to one non-zero power CSI-RS or at least one CSI resource of an aperiodic feedback CSI set;
Among them, a pre-configured anchor CSI resource is indicated by RRC signaling, and the RRC signaling indicates log ₂ (N) bits, N bits, or log for indicating the anchor CSI resource. ₂ (M) bits, or M bits, where N is the magnitude of the CoMP measurement set, and M is the magnitude of the CSI set configured for aperiodic feedback by the base station Yes;
Among them, when the RRC signaling indicates the anchor CSI resource by N bits or M bits, it indicates in the form of a bitmap.

According to one aspect of an embodiment of the present invention, a method for triggering aperiodic feedback during CoMP transmission is provided, wherein the method comprises:
The UE receives dynamic control information (DCI) and pre-configured anchor CSI resources transmitted by the base station; and
The UE performs aperiodic feedback of corresponding channel state information based on the DCI and the anchor CSI resource,
Wherein the anchor CSI resource is at least one CSI resource corresponding to one non-zero power CSI-RS or at least one CSI resource of a CSI set of aperiodic feedback;
Among them, a pre-configured anchor CSI resource is indicated by RRC signaling, and the RRC signaling indicates log ₂ (N) bits, N bits, or log for indicating the anchor CSI resource. ₂ (M) bits, or M bits, where N is the magnitude of the CoMP measurement set, and M is the magnitude of the CSI set configured for aperiodic feedback by the base station Yes;
Among them, when the RRC signaling indicates the anchor CSI resource by N bits or M bits, it indicates in the form of a bitmap.

According to one aspect of an embodiment of the present invention, a base station is provided, wherein the base station is used to trigger aperiodic feedback of UE channel state information (CSI), of which the base station is
A transmission unit for transmitting a feedback set corresponding to the DCI configured in advance by 1-bit or 2-bit dynamic control information (DCI) and RRC signaling to the UE, wherein the UE includes the DCI and the DCI Including a transmitting unit for performing aperiodic feedback of corresponding channel state information based on a feedback set corresponding to
Among them, the feedback set corresponding to the DCI preconfigured by RRC signaling is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; Or classified based on interference type;
Among them, there is one feedback set corresponding to 1-bit DCI, and there are three or two feedback sets corresponding to 2-bit DCI.

According to one aspect of an embodiment of the present invention, a user equipment (UE) is provided, wherein the UE is
A receiving unit for receiving a 1-bit or 2-bit DCI transmitted by the base station and a feedback set corresponding to the DCI preconfigured by RRC signaling; and
A reporting unit for performing aperiodic feedback of corresponding channel state information based on the DCI and a feedback set corresponding to the DCI;
Among them, the feedback set corresponding to the DCI pre-configured by RRC signaling is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; or Categorized based on interference type;
Among them, there is one feedback set corresponding to 1-bit DCI, and there are three or two feedback sets corresponding to 2-bit DCI.

According to one aspect of an embodiment of the present invention, a base station is provided, wherein the base station is used to trigger aperiodic feedback of UE channel state information (CSI), of which the base station is
The UE is a first transmission unit for transmitting a feedback set corresponding to the first DCI, which is configured in advance by 1-bit or 2-bit first DCI and RRC signaling, and the UE includes the first DCI A first transmission unit that performs aperiodic feedback of channel state information of a corresponding carrier aggregation (CA) based on a feedback set corresponding to the first DCI; and
A second transmission unit for transmitting a feedback set corresponding to the second DCI, which is pre-configured by 1-bit or 2-bit second DCI and RRC signaling, to the UE, wherein the UE is the second DCI And a second transmission unit for performing aperiodic feedback of channel state information of the corresponding CoMP transmission (CoMP) based on the feedback set corresponding to the second DCI,
Among them, the feedback set corresponding to the second DCI preconfigured by RRC signaling is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI Or classified based on interference type;
Among them, there is one feedback set corresponding to the 1-bit first DCI, one feedback set corresponding to the 1-bit second DCI, and 3 feedback sets corresponding to the 2-bit first DCI. There are three or two feedback sets corresponding to a 2-bit second DCI.

According to an aspect of an embodiment of the present invention, a UE is provided, wherein the UE is
A first receiving unit for receiving a 1-bit or 2-bit first DCI transmitted by the base station and a feedback set corresponding to the first DCI preconfigured by RRC signaling; and
A first reporting unit for performing aperiodic feedback of channel state information of a corresponding CA based on the first DCI and a feedback set corresponding to the first DCI;
A second receiving unit for receiving a 1-bit or 2-bit second DCI transmitted by the base station and a pre-configured feedback set corresponding to the second DCI; and
A second reporting unit for performing aperiodic feedback of channel state information of the corresponding CoMP based on the second DCI and a feedback set corresponding to the second DCI;
Wherein, the pre-configured feedback set corresponding to the second DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; or Classified on the basis of interference types;
Among them, there is one feedback set corresponding to the 1-bit first DCI, one feedback set corresponding to the 1-bit second DCI, and 3 feedback sets corresponding to the 2-bit first DCI. There are three or two feedback sets corresponding to a 2-bit second DCI.

According to one aspect of an embodiment of the present invention, a base station is provided, wherein the base station is used to trigger a CSI aperiodic feedback of a UE, of which the base station is
A UE is a transmission unit for transmitting a feedback set corresponding to the DCI preconfigured by 2-bit DCI and RRC signaling, and the UE is based on the DCI and the feedback set corresponding to the DCI, Including a transmitting unit that performs aperiodic feedback of the corresponding CA and CoMP channel state information,
Among them, the feedback set corresponding to the pre-configured DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is a carrier for indicating that each triggered transmission point or each configured CSI is supported. Including instruction bits,
Among them, there are three or two feedback sets corresponding to 2-bit DCI.

According to an aspect of an embodiment of the present invention, a UE is provided, wherein the UE is
A receiving unit for receiving a feedback set corresponding to the DCI preconfigured by 2-bit DCI and RRC signaling transmitted by the base station; and
Based on the DCI and the feedback set corresponding to the DCI, a reporting unit for performing aperiodic feedback of channel state information of the corresponding CA and CoMP,
Among them, the feedback set corresponding to the pre-configured DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the pre-configured DCI is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit corresponding to each triggered transmission point or each configured CSI;
Among them, there are three or two feedback sets corresponding to 2-bit DCI.

According to an aspect of an embodiment of the present invention, a base station is provided, wherein the base station is used to trigger a CSI aperiodic feedback of a UE, wherein the base station is
The UE is a transmission unit for transmitting a feedback set corresponding to the DCI preconfigured by 2-bit DCI and RRC signaling, and the UE is based on the DCI and the feedback set corresponding to the DCI, Including a transmitting unit that performs aperiodic feedback of the corresponding CA and CoMP channel state information;
Among them, the feedback set corresponding to the pre-configured DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is configured with a carrier indication bit for indicating a configured or activated carrier, and each configured Including a TP indication bit for indicating a triggered TP or a CSI indication bit for indicating a configured CSI corresponding to an activated or activated carrier; or the RRC signaling is configured or A carrier indication bit for indicating an activated carrier and a carrier indication bit for indicating corresponding to each triggered TP or corresponding to each configured CSI;
Among them, there are three or two feedback sets corresponding to 2-bit DCI.

According to an aspect of an embodiment of the present invention, a UE is provided, wherein the UE is
A receiving unit for receiving a feedback set corresponding to the DCI pre-configured by 2-bit DCI and RRC signaling transmitted by the transmission base station; and
Based on the DCI and the feedback set corresponding to the DCI, a reporting unit for performing aperiodic feedback of channel state information of the corresponding CA and CoMP,
Among them, the feedback set corresponding to the pre-configured DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is configured with a carrier indication bit for indicating a configured or activated carrier, and each configured Includes a TP indication bit of a triggered TP or a CSI indication bit of a configured CSI corresponding to a carrier that has been or activated; or the RRC signaling indicates a configured or activated carrier A carrier indication bit for indicating, and a carrier indication bit for indicating corresponding to each triggered TP or configured CSI;
Among them, there are three or two feedback sets corresponding to 2-bit DCI.

According to an aspect of an embodiment of the present invention, a base station is provided, wherein the base station is used to trigger a CSI aperiodic feedback of a UE, wherein the base station is
The UE is a transmission unit for transmitting a feedback set corresponding to the DCI preconfigured by 2-bit DCI and RRC signaling, and the UE is based on the DCI and the feedback set corresponding to the DCI, Including a transmitting unit that performs aperiodic feedback of the corresponding CA and CoMP channel state information,
Among them, the feedback set corresponding to the pre-configured DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is a carrier indication bit for indicating a triggered acyclic feedback carrier, and each triggered A TP indication bit of the triggered TP corresponding to the carrier or a CSI indication bit of the configured CSI; or the RRC signaling includes a carrier indication bit for indicating a carrier of the triggered aperiodic feedback, and Including a carrier indication bit to indicate corresponding to each triggered TP or corresponding to each configured CSI;
Among them, there are three or two feedback sets corresponding to 2-bit DCI.

According to an aspect of an embodiment of the present invention, a UE is provided, wherein the UE is
A receiving unit for receiving a feedback set corresponding to the DCI preconfigured by 2-bit DCI and RRC signaling transmitted by the base station; and
Based on the DCI and the feedback set corresponding to the DCI, a reporting unit for performing aperiodic feedback of channel state information of the corresponding CA and CoMP,
Among them, the feedback set corresponding to the pre-configured DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is indicated by a carrier indication bit for indicating a triggered aperiodic feedback carrier and a triggered carrier. A corresponding triggered TP indication bit or configured CSI CSI indication bit; or the RRC signaling includes a carrier indication bit for indicating a triggered aperiodic feedback carrier, and each Including a carrier indication bit to indicate that it corresponds to a triggered TP or configured CSI of
Among them, there are three or two feedback sets corresponding to 2-bit DCI.

According to an aspect of an embodiment of the present invention, a base station is provided, wherein the base station is used to trigger a CSI aperiodic feedback of a UE, wherein the base station is
A transmission unit that transmits a feedback set corresponding to the DCI that is configured in advance by 2-bit DCI and RRC signaling to the UE, the UE corresponding to the DCI and the feedback set corresponding to the DCI Including a transmission unit for performing aperiodic feedback of CA and CoMP channel state information;
Among them, the feedback set corresponding to the pre-configured DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling corresponds to a carrier indication bit for indicating a triggered carrier and all triggered carriers. Including TP instruction bit or CSI instruction bit to indicate feedback content,
Among them, there are three or two feedback sets corresponding to 2-bit DCI.

According to an aspect of an embodiment of the present invention, a UE is provided, wherein the UE is
A receiving unit for receiving a feedback set corresponding to the DCI preconfigured by 2-bit DCI and RRC signaling transmitted by the base station; and
Based on the DCI and the feedback set corresponding to the DCI, a reporting unit for performing aperiodic feedback of channel state information of the corresponding CA and CoMP,
Among them, the feedback set corresponding to the pre-configured DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI;
Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling corresponds to a carrier indication bit for indicating a triggered carrier and all triggered carriers. Including TP instruction bit or CSI instruction bit to indicate feedback content,
Among them, there are three or two feedback sets corresponding to 2-bit DCI.

According to an aspect of an embodiment of the present invention, a base station is provided, wherein the base station is used to trigger a CSI aperiodic feedback of a UE, wherein the base station is
A transmission unit for transmitting a 1-bit DCI to the UE, the UE based on the DCI and the preset feedback execution information corresponding to the DCI, a non-periodic feedback of the corresponding channel state information Including a transmission unit,
Among them, the preset feedback execution information corresponding to the DCI includes feedback of all CSIs of the first non-zero power CSI-RS resource or the first CSI of the aperiodic feedback CSI set. Or the feedback of the first CSI in the triggered aperiodic feedback CSI set.

According to an aspect of an embodiment of the present invention, a UE is provided, wherein the UE is
A receiving unit for receiving a 1-bit DCI transmitted by a base station; and aperiodic feedback of corresponding channel state information based on the DCI and preset feedback execution information corresponding to the DCI Including a reporting unit for
Among them, the preset feedback execution information corresponding to the DCI includes feedback of all CSIs of the first non-zero power CSI-RS resource or the first CSI of the aperiodic feedback CSI set. Or the feedback of the first CSI in the triggered aperiodic feedback CSI set.

According to an aspect of an embodiment of the present invention, a base station is provided, wherein the base station is used to trigger a CSI aperiodic feedback of a UE, wherein the base station is
A UE is a transmission unit for transmitting an anchor CSI resource pre-configured by 1-bit DCI and RRC signaling to the UE, based on the DCI and the anchor CSI. Including a sending unit that provides feedback,
Among them, there is one pre-configured anchor CSI resource, which is at least one CSI resource corresponding to a non-zero power CSI-RS or at least one CSI resource in a CSI set of aperiodic feedback;
Among them, a pre-configured anchor CSI resource is indicated by RRC signaling, and the RRC signaling indicates log ₂ (N) bits, N bits, or log for indicating the anchor CSI resource. ₂ (M) bits, or M bits, N is the magnitude of the CoMP measurement set, and M is the magnitude of the CSI set configured for aperiodic feedback by the base station ;
Among them, when the RRC signaling indicates an anchor CSI resource by N bits or M bits, it indicates in the form of a bitmap.

According to an aspect of an embodiment of the present invention, a UE is provided, wherein the UE is
A receiving unit for receiving anchor CSI resources pre-configured by 1-bit DCI and higher layer signaling transmitted by the base station; and
A reporting unit for performing aperiodic feedback of corresponding channel state information based on the DCI and the anchor CSI resource;
Among them, there is one pre-configured anchor CSI resource, which is at least one CSI resource corresponding to a non-zero power CSI-RS or at least one CSI resource in a CSI set of aperiodic feedback;
Among them, a pre-configured anchor CSI resource is indicated by RRC signaling, and the RRC signaling indicates log ₂ (N) bits, N bits, or log for indicating the anchor CSI resource. ₂ (M) bits or including M bits, where N is the size of the measurement set and M is the size of the CSI set configured by the base station for aperiodic feedback;
Among them, when the RRC signaling indicates the anchor CSI resource by N bits or M bits, it indicates in the form of a bitmap.

  According to one aspect of an embodiment of the present invention, a computer readable program is provided, of which when executing the program in a base station, the program is transmitted to the computer in the base station, in the aforementioned base station. The trigger method of the aperiodic feedback during CoMP transmission performed in the above is executed.

  According to an aspect of an embodiment of the present invention, there is provided a storage medium storing a computer readable program, wherein the computer readable program is transmitted to a computer in a base station and in the aforementioned base station. Executes the aperiodic feedback trigger method.

  According to one aspect of an embodiment of the present invention, a computer-readable program is provided, and when the program is executed in a terminal device, the program is transmitted to the computer in the terminal device and in the UE. A trigger method for aperiodic feedback during CoMP transmission to be performed is executed.

  According to an aspect of an embodiment of the present invention, a storage medium storing a computer readable program is provided, of which the computer readable program is transmitted to a computer in a terminal device and during CoMP transmission performed in the UE. The aperiodic feedback trigger method is executed.

  The beneficial effects of the embodiments of the present invention are as follows: different trigger contents are proposed by the trigger method and apparatus for aperiodic feedback according to the embodiments of the present invention, and CSI trigger contents. The trigger method has the best flexibility. Different signaling designs have been proposed in detail for different trigger contents. By considering the joint transmission of CoMP and CA, a method for indicating the joint trigger information has been proposed. Depending on the number of carriers configured for user equipment based on the system, the RRC signaling load can be further reduced. Also, considering the characteristics of the common search space, two types of aperiodic triggering methods have been proposed to effectively trigger aperiodic reporting.

  The following description and drawings disclose specific embodiments of the present invention in detail, and clarify the forms in which the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited to those in scope. Also, within the spirit and scope of the appended claims, the embodiments of the present invention include all modifications, variations, and alternatives.

  Also, the features described and / or illustrated for one embodiment may be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or other implementations. Features in the form can also be replaced.

  It should also be emphasized that terms such as “inclusive / include”, as used herein, refer to the presence of a feature, device (overall), step or assembly, but one or more other features, It also refers to not excluding the presence or addition of equipment (entire), steps or assemblies.

Many aspects of the invention can be better understood with reference to the following drawings. The parts in the figures are not drawn to scale, but merely illustrate the principles of the invention. Corresponding parts in the drawings may be enlarged or reduced in order to conveniently show or explain parts of the invention. Elements and features described in one drawing or embodiment of the invention may be combined with elements and features described in one or more other drawings or embodiments. Also, in the figures, like numerals indicate corresponding parts in some figures, and may also be used to indicate corresponding parts used in one or more embodiments.
3 is a flowchart of a method for triggering aperiodic feedback during CoMP transmission that triggers aperiodic feedback in a user search space under a CoMP transmission scenario in Embodiment 1 of the present invention. (A) And (b) is the block diagram of RRC signaling in the method of Example 1. FIG. 6 is a process flowchart on the UE side corresponding to the method of the first embodiment in the second embodiment of the present invention. 10 is a flowchart of a method for triggering aperiodic feedback during CoMP transmission that triggers aperiodic feedback in a user search space under a combination scenario of CoMP and CA in Example 3 of the present invention. It is a process flowchart of UE corresponding to the method of Example 3 in Example 4 of this invention. 4 is a flowchart of a method for triggering aperiodic feedback during CoMP transmission that triggers aperiodic feedback in a user search space under a combination scenario of CoMP and CA in an embodiment of the present invention. (A) And (b) is a block diagram of RRC signaling in the method of the fifth embodiment. FIG. 10 is a process flowchart on the UE side corresponding to the method of Example 5 in Example 6 of the present invention. FIG. 10 is a flowchart of a method for triggering aperiodic feedback during CoMP transmission that triggers aperiodic feedback in a user search space under a combination scenario of CoMP and CA in Example 7 of the present invention. (A) And (b) is the block diagram of the RRC signaling in Example 8. FIG. FIG. 10 is a process flowchart on the UE side corresponding to the method of Example 7 in Example 8 of the present invention. FIG. 10 is a flowchart of a method for triggering aperiodic feedback during CoMP transmission that triggers aperiodic feedback in a user search space under a combination scenario of CoMP and CA in Example 9 of the present invention. (A) And (b) is the block diagram of the RRC signaling in Example 11. FIG. It is a process flowchart by UE side corresponding to the method of Example 9 in Example 10 of this invention. 20 is a flowchart of a method for triggering aperiodic feedback during CoMP transmission that triggers aperiodic feedback in a user search space under a combination scenario of CoMP and CA in Example 11 of the present invention. (A) And (b) is the block diagram of the RRC signaling in Example 11. FIG. It is a process flowchart by the UE side corresponding to the method of Example 11 in Example 12 of this invention. It is a flowchart of the trigger method of the aperiodic feedback in CoMP transmission which triggers aperiodic feedback in the common search space in Example 13 of this invention. It is a process flowchart by the UE side corresponding to the method of Example 13 in Example 14 of this invention. FIG. 25 is a flowchart of a method for triggering aperiodic feedback during CoMP transmission that triggers aperiodic feedback in a common search space in Example 15 of the present invention. FIG. 20 is a UE-side flowchart corresponding to the method of the fifteenth embodiment in the sixteenth embodiment of the present invention. FIG. 3 is a configuration diagram of a base station corresponding to the first embodiment in the embodiment of the present invention. It is a block diagram of UE corresponding to Example 2 in the Example of this invention. FIG. 10 is a configuration diagram of a base station corresponding to Example 3 in the example of the present invention. In the Example of this invention, it is a block diagram of UE corresponding to Example 4. FIG. FIG. 9 is a configuration diagram of a base station corresponding to Example 5 in the Example of the present invention. FIG. 10 is a configuration diagram of a UE corresponding to Example 6 in the Example of the present invention. FIG. 10 is a configuration diagram of a base station corresponding to Example 7 in the Example of the present invention. FIG. 10 is a configuration diagram of a UE corresponding to Example 8 in the Example of the present invention. FIG. 10 is a configuration diagram of a base station corresponding to Example 9 in the Example of the present invention. In the Example of this invention, it is a block diagram of UE corresponding to Example 10. FIG. FIG. 13 is a configuration diagram of a base station corresponding to Example 11 in the Example of the present invention. It is a block diagram of UE corresponding to Example 12 in the Example of this invention. FIG. 17 is a configuration diagram of a base station corresponding to Example 13 in the Example of the present invention. It is a block diagram of UE corresponding to Example 14 in the Example of this invention. FIG. 17 is a configuration diagram of a base station corresponding to Example 15 in the Example of the present invention. In the Example of this invention, it is a block diagram of UE corresponding to Example 16. FIG.

  The foregoing and other features of the embodiments of the present invention will become more apparent with reference to the drawings and the following description. Moreover, these embodiment is only an illustration and does not limit this invention. In order that those skilled in the art can easily understand the principle and embodiment of the present invention, the embodiment of the present invention is described by taking a trigger method of aperiodic feedback during CoMP transmission in an LTE-A system as an example. It should be understood that embodiments of the present invention are not limited to the system described above, but may be applied to other systems for triggering aperiodic feedback.

  In the following embodiments, the method of combining DCI and higher layer signaling is used as it is, and this makes it possible to obtain a good compromise between the flexibility of the trigger for aperiodic feedback and the magnitude (size) of the signaling load. it can. In order to make the method in the embodiment of the present invention easier to understand, different application scenarios, for example, a trigger scenario in a user search space (CoMP transmission scenario and a combination scenario of CoMP and CA) and a common search space are described below. A trigger method of aperiodic feedback in each embodiment of the present invention will be described based on the trigger scenario (CoMP transmission scenario and CoMP and CA combination scenario). Note that the trigger method for aperiodic feedback under each scenario is not independent. For example, in the scenario of a combination of CoMP and CA, the trigger method in the CoMP transmission scenario may be used. In the trigger method in the search space, the trigger method in the user search space may be used. Each will be described below.

<CoMP transmission scenario that triggers aperiodic feedback in user search space>
In the LTE-A system, in order to support CoMP transmission, it is necessary to feed back CSI information under different transmission points and interference temporary facilities. In order to obtain a compromise between feedback flexibility and signaling load, embodiments of the present invention employ a combination of dynamic DCI and higher layer RRC signaling.

Example 1
Embodiments of the present invention provide a method for triggering aperiodic feedback during CoMP transmission. FIG. 1 is a flowchart of the method. As shown in FIG. 1, the method includes the following steps.

  Step 101: The base station transmits dynamic control information (DCI) and a preconfigured feedback set corresponding to the DCI to the UE, so that the UE is based on the DCI and the feedback set corresponding to the DCI. Triggering aperiodic feedback of the corresponding channel state information.

  In this embodiment, since the non-periodic feedback is triggered in the user search space, the DCI signaling can reuse the 2-bit information in the DCI format O or DCI format 4 CSI request field. In other words, when aperiodic feedback (report) is triggered in the user search space, the base station sends a 2 bit CSI request signaling (DCI) to the UE to provide aperiodic feedback of the UE's CSI information. Can be triggered. In one embodiment, when the 2-bit DCI is 00, it indicates that an aperiodic report is not triggered; when 01, 10, and 11, respectively, feedback set 1 and feedback set 2 configured by higher layers are provided. Instruct to trigger acyclic reporting of feedback set 3. In another embodiment, when the 2-bit DCI is 00, it indicates that an aperiodic report is not triggered; when 01, the CSI report of the anchor cell (primary cell or other specific single cell) is transmitted. Instruct to trigger; when 10, 11, indicate to trigger aperiodic reporting of feedback set 1 and feedback set 2 configured by higher layers, respectively.

  In this embodiment, in response to each non-all-zero bit of DCI, for example, 01, 10, and 11, the base station preliminarily sets a corresponding feedback set, that is, the above-described feedback set 1 or feedback set 2 or feedback set. 3, so that the UE performs corresponding CSI aperiodic feedback based on the content indicated by the received DCI bits and the corresponding feedback set.

  In the present embodiment, when the periodic feedback CSI set is a subset of the aperiodic feedback CSI set, the base station directly configures one CSI set by higher layer signaling (RRC signaling), thereby performing periodic and aperiodic CSI. Feedback instructions can be realized, of which aperiodic CSI feedback uses this set directly. If the aperiodic feedback CSI set cannot include the periodic feedback CSI set, the base station not only needs to configure the CSI set required for joint feedback by higher layer signaling, but also by the higher layer signaling. Therefore, it is necessary to configure a CSI set. At this time, the previously configured feedback set corresponding to the DCI is selected from the CSI set configured by the upper layer for aperiodic feedback.

  Among them, the preconfigured feedback set corresponding to the DCI may be classified based on a triggered transmission point or non-zero power CSI-RS, or may be classified based on the configured CSI. And may be classified based on the interference type.

  In one embodiment, the feedback set is classified based on a triggered transmission point (TP) or non-zero power CSI-RS. Then, in this embodiment, each feedback set is used to indicate a transmission point that needs to be triggered or a CSI set corresponding to a non-zero power CSI-RS. For example, feedback sets 1, 2, and 3 are , Indicate CSI sets corresponding to triggered transmission points or non-zero power CSI-RS, respectively. In this embodiment, if the size of the CoMP measurement set is N, the feedback set may be indicated by an N-bit bitmap of radio resource control (RRC) signaling, of which the triggered transmission point is , Set to 1 in the N-bit bitmap. Taking N = 3 as an example, that is, when the size of the CoMP measurement set is 3, if there are three transmission points that can perform CoMP transmission, and two transmission points are triggered in feedback set 1, the RRC signaling In the 3 bit bitmap, the bits corresponding to the two transmission points are set to 1 as shown in FIG.

  In this example, each non-zero power CSI-RS may correspond to different interference hypotheses, so it may include multiple CSI information. Thus, in this example, the feedback set may be classified based on a non-zero power CSI-RS, i.e., the feedback set includes all of the reportable aperiodic feedback CSI sets, It indicates CSI information including non-zero power CSI-RS.

In this embodiment, in order to enhance flexibility, the base station may further configure in advance an interference provision that needs to be fed back to each non-zero power CSI-RS, whereby the UE Can perform aperiodic feedback of the corresponding channel state information based on the temporary interference. The temporary interference may be configured by RRC signaling. Still, taking the case where the size of the CoMP measurement set is N as an example, in this embodiment, the interference temporary configuration may be configured by RRC signaling of 2 ^(Ν-1) bits, of which the bit is set to 1. Being set means that CSI information under the corresponding interference provision needs to be fed back.

  In other embodiments, the feedback set is classified based on the configured CSI. In this embodiment, each feedback set is then used to indicate the CSI set that needs to be triggered. For example, feedback sets 1, 2, and 3 indicate CSI sets that need to be triggered, respectively.

  In this embodiment, the feedback set may be indicated by a bitmap of Μ bits of RRC signaling, where Μ is the size of the CSI set configured by the base station for aperiodic feedback, and the user It may be the size of the CSI set of aperiodic reporting that can be supported at maximum. For example, Μ = 5 or 6. Among them, the bit set to 1 indicates that the corresponding CSI information needs to be fed back, and Μ = 5 is taken as an example, and the feedback set indication method is as shown in FIG. 2b. With such a classification method, the granularity for instructing aperiodic feedback becomes finer.

  In other embodiments, feedback sets are classified based on interference types. Then, in this embodiment, each feedback set is used to indicate a CSI set corresponding to a possible interference type. For example, feedback sets 1, 2, and 3 each show a report of possible interference types.

In the present embodiment, the size of the CoMP measurement set is still N, and there are 2 ^(N-1) types of possible interference types. Therefore, there are 2 ^(N-1) feedback sets. May be indicated by RRC signaling of the mapped bit of the bit, which indicates the type of interference that needs to be reported. In other words, it is necessary to report all CSIs including the interference type indicated by the feedback set (CSI including a plurality of non-zero-power CSI-RS provisions) among the CSI sets of aperiodic feedback. For example, for a CoMP set whose measurement set size is 3, it is necessary to use 4 bits to indicate CSI information for reporting in sets 1, 2, and 3, respectively.

  In each of the above embodiments, new RRC signaling can be employed to indicate a dynamically triggered aperiodic feedback feedback set. For example, RRC signaling as shown in Fig. 2 (a) and Fig. 2 (b); dynamically triggered by reusing 8-bit RRC indication signaling in the carrier aggregation system (CA) An aperiodic feedback CSI feedback set may be indicated, and the present embodiment is not limited to this. In other words, if it is an indication of the feedback set by classifying the feedback set according to the classification method described above and configuring RRC signaling with a corresponding number of bits corresponding to the classification method, Belongs to the protection scope of the present invention.

  With the method of the present embodiment, by triggering the UE's aperiodic feedback, the UE does not need to report all CSI information (multiple CSI information corresponding to different transmission points and interference temporary conditions), and feedback. Report selectively based on conditions that the set has limited; or report only CSI sets corresponding to triggered transmission points; or report only CSI sets corresponding to non-zero power CSI-RS Or report only triggered CSI sets; or report only CSI sets corresponding to several interference types. This solves the problem that the feedback load is large due to the need to report multiple CSI information corresponding to different transmission points and interference provisions during CoMP transmission, and provides feedback flexibility and system signaling load. A good compromise can be realized.

Example 2
The embodiment of the present invention further provides a method for triggering aperiodic feedback during CoMP transmission, which is UE processing corresponding to the method of Embodiment 1. FIG. 3 is a flowchart of the method. As shown in FIG. 3, the method includes the following steps.

Step 301: A user equipment (UE) receives a DCI transmitted by a base station and a preconfigured feedback set corresponding to the DCI;
Step 302: The UE performs aperiodic feedback of the corresponding channel state information based on the DCI and the feedback set corresponding to the DCI.

  In the present embodiment, the DCI instruction method, the feedback set classification method, and the instruction method are the same as those in the first embodiment, and the contents thereof are incorporated herein, and thus detailed description thereof is omitted here.

  In this embodiment, the UE determines a feedback set based on the received DCI transmitted from the base station, and performs a non-periodic feedback of the corresponding CSI based on the content indicated by the feedback set. Among them, when the 2-bit information of DCI is 00, it indicates that the aperiodic report is not triggered.However, since the embodiment of the present invention is about triggering the aperiodic report, in the following explanation, Unless otherwise specified, the case where the 2-bit information of DCI is 00 is not included.

In this embodiment, if the 2-bit information 01, 10, 11 of DCI indicates that each triggers feedback sets 1, 2, 3 configured by higher layers, the IDC received by the UE is 10. In some cases, the feedback set 2 is triggered, and the UE performs aperiodic feedback of the corresponding CSI information based on the content indicated by the feedback set 2 configured by the higher layer. For example, if the feedback set 2 configured by the higher layer indicates the triggered transmission point by the N-bit bitmap of RRC signaling (N is the magnitude of the CoMP measurement set), the UE Report only the CSI set corresponding to the triggered transmission point; if feedback set 2 configured by higher layers indicates non-zero power CSI-RS by N-bit bitmap of RRC signaling, The UE only reports CSI sets corresponding to non-zero power CSI-RS; the feedback set 2 configured by the upper layer is an M bit bitmap of RRC signaling (M is the upper layer is aperiodic feedback) The UE reports only the triggered CSI set if it indicates the triggered CSI set (by the size of the CSI set configured for) Feedback set 2 constituted by, by 2 ^(N-1) bits of RRC signaling, if the instruction interference type that needs to be reported, UE, only CSI set corresponding to these interference types To report.

  According to the method of the present embodiment, the UE does not need to report all the CSI information (a plurality of CSI information corresponding to different transmission points and interference temporary conditions), and is selectively based on conditions limited by the feedback set. This can solve the problem of a large feedback load due to the need to report multiple CSI information corresponding to different transmission points and interference provisions during CoMP transmission, and flexible feedback. And a good compromise between the system and the signaling load of the system.

<CoMP and CA combination scenario that triggers aperiodic feedback in user search space>
In the LTE-A system, carrier aggregation (CA) technology may be used in combination with CoMP in order to improve UE transmission efficiency. In a present Example, the trigger of CSI aperiodic report of UE is implement | achieved by the independent structure or the structure which joined.

Example 3
Embodiments of the present invention provide a method for triggering aperiodic feedback during CoMP transmission, which realizes triggering of CSI aperiodic reporting of UE by an independent configuration. FIG. 4 is a flowchart of the method. As shown in FIG. 4, the method includes the following steps.

Step 401: The base station transmits a first DCI and a preconfigured feedback set corresponding to the first DCI to the UE, whereby the UE provides feedback corresponding to the first DCI and the first DCI. Aperiodic feedback of the channel state information of the corresponding carrier aggregation (CA) based on the set;
Step 402: The base station transmits to the UE a second DCI and a preconfigured feedback set corresponding to the second DCI, so that the UE corresponds to the second DCI and the second DCI. Based on the above, aperiodic feedback of channel state information of the corresponding CoMP transmission (CoMP) is performed.

  In this embodiment, the preconfigured feedback set corresponding to the second DCI may be classified based on a triggered transmission point or a non-zero power CSI-RS, and based on the configured CSI. You may classify | categorize and you may classify | categorize based on interference type. The specific classification method and signaling instruction method are the same as those in the first embodiment, the contents of which are incorporated herein, and detailed description thereof is omitted here.

  In one embodiment, each of the first DCI and the second DCI is 1-bit information. Then, the method of this embodiment reuses the conventional 2-bit DCI signaling, of which one bit (second DCI) is used to trigger the CoMP aperiodic report and the other bits (second One DCI) is used to trigger CA aperiodic reporting.

  For example, Ox represents not triggering CoMP aperiodic reporting; lx represents triggering set 1 configured by RRC for CoMP aperiodic feedback; x0 does not trigger CA aperiodic reporting Xl represents triggering set 2 configured by RRC for CA aperiodic feedback.

  In another embodiment, each of the first DCI and the second DCI is 2-bit information. Then, the method of the present embodiment triggers CoMP by adding 2-bit DCI signaling, and triggers CA aperiodic reporting by the original 2-bit DCI signaling.

  In the present embodiment, the instruction method of the first DCI and the second DCI is the same as that of the first embodiment, for example, by 00, instructing not to trigger the aperiodic feedback, by 01, 10, 11, Instruct to trigger aperiodic feedback of feedback set 1, feedback set 2, feedback set 3 configured by higher layer; or to instruct to not trigger aperiodic feedback according to 11, and to anchor cell ( Instructs to trigger aperiodic feedback of CSI of primary cell or other specific single cell), and triggers aperiodic feedback of feedback set 1 and feedback set 2 configured by higher layers by 10, 11 Instruct.

  In the present embodiment, both the feedback set corresponding to the first DCI and the feedback set corresponding to the second DCI may be configured by RRC signaling as in the method of Embodiment 1, the contents of which are incorporated herein. Therefore, detailed explanation is omitted here. For example, the feedback set corresponding to the first DCI is indicated by 8-bit RRC signaling, and the feedback set corresponding to the second DCI is an idle bit in the 8-bit RRC signaling or a newly added RRC. Signaling (as in FIG. 2 (a) or 2 (b)) is indicated.

  In the method of the present embodiment, by triggering the aperiodic feedback of the UE, feedback load due to the need to report multiple CSI information corresponding to different transmission points and interference provisions during CA and CoMP joint transmission Can be solved, and a good compromise between feedback flexibility and system signaling load can be achieved.

Example 4
The embodiment of the present invention further provides a method of triggering aperiodic feedback during CoMP transmission, which is UE processing corresponding to the method of Embodiment 3. FIG. 5 is a flowchart of the method. As shown in FIG. 5, the method includes the following steps.

Step 501: The UE receives a first DCI transmitted by a base station and a preconfigured feedback set corresponding to the first DCI;
Step 502: The UE performs aperiodic feedback of the channel state information of the corresponding CA based on the first DCI and the feedback set corresponding to the first DCI;
Step 503: The UE receives a second DCI transmitted by the base station and a preconfigured feedback set corresponding to the second DCI;
Step 504: The UE performs aperiodic feedback of the corresponding CoMP channel state information based on the second DCI and the feedback set corresponding to the second DCI.

  In the present embodiment, the first DCI and the second DCI are designated in the same manner as in the third embodiment, the contents of which are incorporated herein, and detailed description thereof is omitted here.

  In this embodiment, the preconfigured feedback set corresponding to the second DCI may be classified based on a triggered transmission point or a non-zero power CSI-RS, and based on the configured CSI. It may be classified and may be classified based on the type of interference that needs to be reported. The specific feedback set classification method and feedback set signaling instruction method are the same as those in the first embodiment, the contents of which are incorporated herein and detailed description thereof is omitted here.

  In this embodiment, the UE determines a feedback set corresponding to the first DCI based on the received first DCI transmitted from the base station, and the content indicated by the feedback set corresponding to the first DCI Based on, perform aperiodic feedback of the CSI of the corresponding CA. Also, the UE determines a feedback set corresponding to the second DCI based on the received second DCI transmitted from the base station, and based on the content indicated by the feedback set corresponding to the second DCI , Perform aperiodic feedback of the corresponding CoMP CSI.

  Accordingly, the UE can determine the corresponding CA feedback set and the corresponding CoMP feedback set based on the received first DCI and the second DCI, and the CA CSI aperiodic feedback based on the CA feedback set. And aperiodic feedback for CMP CSI based on the CoMP feedback set.

  According to the method of the embodiment, during the CA and CoMP joint transmission, it is possible to solve the problem that the feedback load is large due to the need to report a plurality of CSI information corresponding to different transmission points and interference temporary settings, and the feedback A good compromise between flexibility and system signaling load can be achieved.

Example 5
Embodiments of the present invention further provide a method for triggering aperiodic feedback during CoMP transmission, which implements a UE CSI aperiodic reporting trigger with a joint configuration. FIG. 6 is a flowchart of the method. As shown in FIG. 6, the method includes the following steps.

  Step 601: The base station transmits to the UE a DCI and a preconfigured feedback set corresponding to the DCI, so that the UE is based on the DCI and the feedback set corresponding to the DCI, and a corresponding CA and Performs aperiodic feedback of CoMP channel state information.

  In the present embodiment, the DCI instruction method is the same as that in the first embodiment, the contents of which are incorporated herein, and a detailed description thereof is omitted here.

  In this embodiment, the preconfigured feedback set corresponding to the DCI may be classified based on a triggered transmission point or a non-zero power CSI-RS, or classified based on the configured CSI. The specific classification method is the same as that in the first embodiment, and the contents thereof are incorporated herein, and detailed description thereof is omitted here. Also, the preconfigured feedback set corresponding to the DCI is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit corresponding to each triggered transmission point or each configured CSI.

  In this embodiment, a 2-bit DCI information triggers a plurality of feedback sets configured by RRC signaling, and these feedback sets are determined by CA and CoMP CSI.

  In one embodiment, when the feedback set is classified based on a triggered transmission point or non-zero power CSI-RS, i.e., if the transmission point is the content of aperiodic feedback, the feedback set is indicated. RRC signaling is realized by a cascade connection configuration of a plurality of transmission points, that is, the RRC signaling is a carrier indication bit corresponding to each triggered transmission point, as shown in FIG. including. In FIG. 7 (a), the selection of subcarriers from 8 bits is taken as an example, but in actuality, the LTE-A system at present can support a maximum of 5 subcarriers. Corresponding to each triggered TP, only 5 bits may indicate a subcarrier that can be selected.

  In another embodiment, when the feedback set is classified based on the configured CSI, that is, when CSI is the content of aperiodic feedback, the RRC signaling for indicating the feedback set is CSI. It is realized by a cascade connection configuration of information, that is, the RRC signaling includes a carrier indication bit corresponding to each configured CSI as shown in FIG. 7 (b). In FIG. 7 (b), subcarrier selection from 8 bits is taken as an example, but in the same way, the LTE-A system so far can support a maximum of 5 subcarriers. Corresponding to each configured CSI, subcarriers that can be selected may be indicated by only 5 bits.

  In the method of the present embodiment, by triggering the aperiodic feedback of the UE, feedback load due to the need to report multiple CSI information corresponding to different transmission points and interference provisions during CA and CoMP joint transmission Can be solved, and a good compromise between feedback flexibility and system signaling load can be achieved.

Example 6
The embodiment of the present invention further provides a method for triggering aperiodic feedback during CoMP transmission, which is UE-side processing corresponding to the method of Embodiment 5. FIG. 8 is a flowchart of the method. As shown in FIG. 8, the method includes the following steps.

Step 801: The UE receives a DCI transmitted by a base station and a preconfigured feedback set corresponding to the DCI;
Step 802: The UE performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and the feedback set corresponding to the DCI.

  In the present embodiment, the DCI instruction method is the same as that in the first embodiment, the contents of which are incorporated herein, and a detailed description thereof is omitted here.

  In this embodiment, the preconfigured feedback set corresponding to the DCI may be classified based on a triggered transmission point or a non-zero power CSI-RS, or classified based on the configured CSI. The specific classification method is the same as that in the first embodiment, and the contents thereof are incorporated herein, and detailed description thereof is omitted here. Also, the preconfigured feedback set corresponding to the DCI is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit corresponding to each triggered transmission point or each configured CSI. .

  In this embodiment, after receiving the DCI transmitted by the base station, the UE determines a corresponding feedback set based on the DCI, and based on the content indicated by the feedback set, Perform aperiodic feedback for CSI. Among them, the feedback set is indicated by RRC signaling by the base station, and corresponding to different classification schemes, the RRC signaling adopts different indication schemes, and the specific indication scheme has already been implemented. Since it is described in detail in Example 5, detailed description is omitted here.

  According to the method of this embodiment, the UE performs a non-periodic feedback of the corresponding CSI based on the DCI and the higher layer (RRC signaling) indication feedback set transmitted by the base station, and thereby, joint transmission of CA and CoMP Solves the problem of large feedback load due to the need to report multiple CSI information corresponding to different transmission points and interference temporary, and realizes a good compromise between feedback flexibility and system signaling load can do.

Example 7
Embodiments of the present invention further provide a method for triggering aperiodic feedback during CoMP transmission, which also implements a trigger for aperiodic reporting of CSI of the UE through a joint configuration. FIG. 9 is a flowchart of the method. As shown in FIG. 9, the method includes the following steps.

  Step 901: The base station transmits a DCI and a preconfigured feedback set corresponding to the DCI to the UE, so that the UE can perform a corresponding response based on the DCI and the feedback set corresponding to the DCI. Performs aperiodic feedback of CA and CoMP channel state information.

  In the present embodiment, the DCI instruction method is the same as that in the first embodiment, the contents of which are incorporated herein, and a detailed description thereof is omitted here.

  In this embodiment, the feedback set corresponding to the DCI configured in advance may be classified based on a triggered transmission point or a non-zero power CSI-RS, or classified based on the configured CSI. The specific classification method is the same as that of the first embodiment, the contents of which are incorporated herein, and the detailed description thereof is omitted here. Also, in this embodiment, the feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit for indicating a configured or activated carrier, and A TP indication bit for indicating a triggered TP corresponding to each configured or activated carrier or a CSI indication bit for indicating a configured CSI; or the RRC signaling is A carrier indication bit for indicating a configured or activated carrier and a carrier indication bit for indicating corresponding to each triggered TP or configured CSI. If the carrier indication bit of the configured or activated carrier already exists, the content of this part is not included in the RRC signaling.

  In the present embodiment, similarly, 2-bit DCI information triggers a plurality of feedback sets configured by RRC signaling, and these feedback sets are determined by CA and CoMP CSI. However, the difference from the fifth embodiment is that the carrier to be used is configured when the UE performs CA transmission or that some carriers are activated. The RRC signaling for indicating the periodic feedback set includes not only this part of the carrier indication bit, but also the transmission point indication bit or configured of the triggered transmission point corresponding to the configured or activated carrier. The CSI indication bit of CSI is also included. That is, cascading the carrier indication bit and the CoMP CSI feedback information (triggered TP indication bit or configured CSI CSI indication bit) corresponding to the configured or activated carrier, It constitutes one signaling.

  In one embodiment, when the feedback set is classified based on a triggered transmission point or non-zero power CSI-RS, i.e., if the transmission point is the content of aperiodic feedback, the feedback set is indicated. RRC signaling to do this is realized by a carrier indication bit and a TP indication bit of the triggered TP corresponding to each activated or configured carrier. As shown in FIG. 10 (a), the RRC signaling includes a carrier indication bit (left side of “+” in FIG. 10 (a)), of which three carriers are active so that they can be used. In this case, the TP indication bit of the triggered TP is configured corresponding to each of the three carriers, and the number of triggered transmission points is indicated on the right side of “+”. If 3 is 3, each carrier requires 3 bits of information.

  In another embodiment, when the feedback set is classified based on the configured CSI, that is, when CSI is the content of aperiodic feedback, the RRC signaling for indicating the feedback set is a carrier indication Bits and CSI indication bits of the configured CSI corresponding to each activated or configured carrier. As shown in FIG. 10 (b), the RRC signaling is configured to correspond to the carrier indication bits on the left side of “+” and each activated or configured carrier on the right side of “+”. The CSI indication bit of the CSI Of these, assuming that the configured CSI set is 5, each carrier requires 5 bits of information.

  In the above embodiment, the first stage of the RRC signaling is the carrier instruction bit and the second stage is the TP instruction bit or the CSI instruction bit. However, in the concrete implementation, the first stage is the TP instruction bit. A method may be adopted in which the indication bit or the CSI indication bit is used and the second stage is the carrier indication bit, i.e., the RRC signaling is a carrier indication bit for indicating a configured or activated carrier, In addition, a carrier indication bit may be included to indicate that each triggered TP or configured CSI is supported, and the present embodiment is not limited thereto.

  In the method of the present embodiment, by triggering the aperiodic feedback of the UE, feedback load due to the need to report multiple CSI information corresponding to different transmission points and interference provisions during CA and CoMP joint transmission Can be solved, and a good compromise between system flexibility and signaling load can be obtained.

Example 8
The embodiment of the present invention further provides a method of triggering aperiodic feedback during CoMP transmission, which is UE processing corresponding to the method of Embodiment 7. FIG. 11 is a flowchart of the method. As shown in FIG. 11, the method includes the following steps.

Step 1101: A UE receives a DCI transmitted by a base station and a preconfigured feedback set corresponding to the DCI;
Step 1102: The UE performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and the feedback set corresponding to the DCI.

  In the present embodiment, the DCI instruction method is the same as that in the first embodiment, the contents of which are incorporated herein, and a detailed description thereof is omitted here.

  In this embodiment, the feedback set corresponding to the DCI configured in advance may be classified based on a triggered transmission point or a non-zero power CSI-RS, or classified based on the configured CSI. Also good. The specific classification method is the same as in Example 1, the contents of which are incorporated herein, and detailed description thereof is omitted here. Also, in this embodiment, the feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit for indicating a configured or activated carrier, and Includes a triggered TP TP indication bit or a configured CSI CSI indication bit corresponding to each configured or activated carrier; or the RRC signaling is configured or activated It includes a bit for indicating a carrier and a bit for indicating a carrier corresponding to each triggered TP or configured CSI.

  In this embodiment, after receiving the DCI transmitted by the base station, the UE determines a corresponding feedback set based on the DCI, and based on the content indicated by the feedback set, the corresponding CSI Perform aperiodic feedback. Among them, the feedback set is indicated by RRC signaling by the base station, and corresponding to different classification schemes, the RRC signaling adopts different indication schemes. The detailed description is omitted here since it is described in detail in FIG.

  According to the method of the present embodiment, the UE performs the corresponding CSI aperiodic feedback based on the DCI transmitted by the base station and the feedback set indicated by the higher layer (RRC signaling), and thereby the CA and CoMP. Can solve the problem of large feedback load due to the need to report multiple CSI information corresponding to different transmission points and interference temporary during joint transmission, and get a good compromise between system flexibility and signaling load be able to.

Example 9
Embodiments of the present invention further provide a method for triggering aperiodic feedback during CoMP transmission, which also implements a trigger for aperiodic reporting of CSI of the UE through a joint configuration. FIG. 12 is a flowchart of the method. As shown in FIG. 12, the method includes the following steps.

  Step 1201: The base station transmits to the UE a DCI and a feedback set corresponding to the pre-configured DCI, so that the UE is based on the DCI and the feedback set corresponding to the DCI, and a corresponding CA and Performs aperiodic feedback of CoMP channel state information.

  In the present embodiment, the DCI instruction method is the same as that in the first embodiment, the contents of which are incorporated herein, and a detailed description thereof is omitted here.

  In this embodiment, the feedback set corresponding to the DCI configured in advance may be classified based on a triggered transmission point or a non-zero power CSI-RS, or classified based on the configured CSI. Also good. The specific classification method is the same as in Example 1, the contents of which are incorporated herein, and detailed description thereof is omitted here. Also, in this embodiment, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is a carrier indication bit for indicating a carrier of triggered aperiodic feedback, and Includes a TP indication bit of the triggered TP or a CSI indication bit of the configured CSI corresponding to each triggered carrier; or the RRC signaling is a carrier for indicating a triggered aperiodic feedback carrier An indication bit and a carrier indication bit corresponding to each triggered TP or configured CSI.

  In the present embodiment, similarly, a plurality of feedback sets configured by RRC signaling are triggered by 2-bit DCI information, and the feedback sets are determined by CA and CoMP CSI. However, the difference from the seventh embodiment is that when the UE performs CA transmission, the carrier to be used is not configured or activated, and the use of some carriers is triggered in the operation process. Then, in this embodiment, the RRC signaling for indicating the aperiodic feedback set includes the carrier indication bit of this part of the triggered carrier and the transmission of the triggered transmission point corresponding to the triggered carrier. Contains the point indication bit or the CSI indication bit of the configured CSI. That is, the carrier indication bit of the triggered carrier and the CoMP CSI feedback information (the TP indication bit of the triggered TP or the CSI indication bit of the configured CSI) corresponding to the triggered carrier are cascaded, and 1 One signaling.

  In one embodiment, when the feedback set is classified based on a triggered transmission point or non-zero power CSI-RS, i.e., if the transmission point is the content of aperiodic feedback, the feedback set is indicated. RRC signaling is performed by a carrier indication bit and a TP indication bit of the triggered TP corresponding to each triggered carrier. Among them, since the number of triggered carriers changes, the RRC signaling for indicating the corresponding aperiodic feedback set also changes. As shown in FIG. 13 (a), the RRC signaling includes a carrier indication bit (left side of “+” in FIG. 13 (a)), of which 3 carriers (0th and 1st) , And the third) are triggered, and in this case, the TP indication bit of the triggered TP is configured corresponding to each of the three carriers, and is triggered as shown on the right side of “+”. If the number of transmission points is 3, each carrier requires 3 bits of information.

  In another embodiment, when the feedback set is classified based on the configured CSI, that is, when CSI is the content of aperiodic feedback, the RRC signaling for indicating the feedback set is a carrier indication Bits and CSI indication bits of the configured CSI corresponding to each triggered carrier. As shown in FIG. 13 (b), the RRC signaling includes CSI of the configured CSI corresponding to each triggered carrier on the left side of “+” and the carrier indication bit on the right side of “+”. Contains indicator bits. Of these, if the configured CSI set is 5, each carrier requires 5 bits of information.

  In the above embodiment, similarly, the first stage of the RRC signaling is the carrier instruction bit and the second stage is the TP instruction bit or the CSI instruction bit, but in the concrete implementation, A method may be adopted in which the stage is a TP indication bit or a CSI indication bit and the second stage is a carrier indication bit, i.e., the RRC signaling includes a carrier indication bit for indicating a triggered carrier, and This may include a carrier indication bit for indicating that each triggered TP or configured CSI is supported, and the present embodiment is not limited thereto.

  In the method of the present embodiment, by triggering UE aperiodic feedback, feedback load due to the need to report multiple CSI information corresponding to different transmission points and interference hypotheses during joint transmission of CA and CoMP Larger problems can be solved, and a good compromise between feedback flexibility and system signaling load.

Example 10
The embodiment of the present invention further provides a method of triggering aperiodic feedback during CoMP transmission, which is UE processing corresponding to the method of Embodiment 9. FIG. 14 is a flowchart of the method. As shown in FIG. 14, the method includes the following steps.

Step 1401: The UE receives a DCI transmitted by a base station and a feedback set corresponding to the pre-configured DCI;
Step 1402: The UE performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and the feedback set corresponding to the DCI.

  In the present embodiment, the DCI instruction method is the same as that in the first embodiment, the contents of which are incorporated herein, and a detailed description thereof is omitted here.

  In this embodiment, the feedback set corresponding to the DCI configured in advance may be classified based on a triggered transmission point or a non-zero power CSI-RS, or classified based on the configured CSI. Also good. The specific classification method is the same as in Example 1, the contents of which are incorporated herein, and detailed description thereof is omitted here. Also, in this embodiment, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is a carrier indication bit for indicating a carrier of triggered aperiodic feedback, and Includes a TP indication bit of the triggered TP or a CSI indication bit of the configured CSI corresponding to each triggered carrier; or the RRC signaling is a carrier for indicating a triggered aperiodic feedback carrier It includes an indication bit and a carrier indication bit to indicate that it corresponds to each triggered TP or configured CSI.

  In this embodiment, after receiving the DCI transmitted by the base station, the UE determines a corresponding feedback set based on the DCI, and based on the content indicated by the feedback set, the corresponding CSI Perform aperiodic feedback. Among them, the feedback set is indicated by RRC signaling by the base station, and corresponding to different classification schemes, the RRC signaling adopts different indication schemes, and the specific indication scheme has already been implemented. This is described in detail in Example 9, and the detailed description is omitted here.

  According to the method of the present embodiment, the UE performs corresponding CSI aperiodic feedback based on the DCI transmitted from the base station and the feedback set indicated by the higher layer (RRC signaling), and is performing joint transmission of CA and CoMP. Can solve the problem of large feedback load due to the need to report multiple CSI information corresponding to different transmission points and temporary interference, and realizes a good compromise between feedback flexibility and system signaling load be able to.

Example 11
Embodiments of the present invention further provide a method for triggering aperiodic feedback during CoMP transmission, which also implements a trigger for aperiodic reporting of CSI of the UE through a joint configuration. FIG. 15 is a flowchart of the method. As shown in FIG. 15, the method includes the following steps.

  Step 1501: The base station transmits a feedback set corresponding to the DCI and the pre-configured DCI to the UE, so that the UE can perform a corresponding CA based on the feedback set corresponding to the DCI and the DCI. And aperiodic feedback of CoMP channel state information.

  In the present embodiment, the DCI instruction method is the same as that in the first embodiment, the contents of which are incorporated herein, and a detailed description thereof is omitted here.

  In this embodiment, the feedback set corresponding to the DCI configured in advance may be classified based on a triggered transmission point or a non-zero power CSI-RS, or classified based on the configured CSI. Also good. The specific classification method is the same as in Example 1, the contents of which are incorporated herein, and detailed description thereof is omitted here. Further, in this embodiment, the feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is indicated by a carrier indication bit for indicating a triggered carrier, and each triggered A TP instruction bit or a CSI instruction bit for indicating the feedback content corresponding to the carrier is included.

  In this example, to reduce the signaling load, it is assumed that the contents of all triggered aperiodic feedback in all triggered carriers are the same, and so indicate the feedback set for aperiodic feedback RRC signaling includes only the carrier indication bit of the triggered carrier and the feedback content (TP indication bit or CSI indication bit) of the feedback of the triggered carrier.

  In one embodiment, as shown in FIG. 16 (a), carrier 0 and carrier 1 are triggered under a classification scheme in which TP is the content of aperiodic feedback, and the triggered aperiodic of the carriers is triggered. If the feedback contents are the same, the RRC signaling includes only the carrier indication bit and the corresponding TP indication bit.

  In another embodiment, as shown in FIG. 16 (b), carrier 0 and carrier 1 are triggered under the classification scheme in which CSI is the content of aperiodic feedback, and the carrier is triggered. If the content of the aperiodic feedback is the same, the RRC signaling includes only the carrier indication bit and the corresponding CSI indication bit.

  In the method of this embodiment, since the signaling load is small by triggering a non-periodic feedback of the UE, it is necessary to report a plurality of CSI information corresponding to different transmission points and interference temporary settings during joint transmission of CA and CoMP. It is possible to solve the problem that the feedback load is large due to the existence, and to realize a good compromise between the flexibility of feedback and the signaling load of the system.

Example 12
The embodiment of the present invention further provides a method of triggering aperiodic feedback during CoMP transmission, which is UE processing corresponding to the method of Embodiment 11. FIG. 17 is a flowchart of the method. As shown in FIG. 17, the method includes the following steps.

Step 1701: The UE receives a DCI transmitted by a base station and a feedback set corresponding to the pre-configured DCI;
Step 1702: The UE performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and the feedback set corresponding to the DCI.

  In the present embodiment, the DCI instruction method is the same as that in the first embodiment, the contents of which are incorporated herein, and a detailed description thereof is omitted here.

  In this embodiment, the feedback set corresponding to the DCI configured in advance may be classified based on a triggered transmission point or a non-zero power CSI-RS, or classified based on the configured CSI. Also good. The specific classification method is the same as in Example 1, the contents of which are incorporated herein, and detailed description thereof is omitted here. Further, in this embodiment, the feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is indicated by a carrier indication bit for indicating a triggered carrier, and each triggered A TP instruction bit or a CSI instruction bit for indicating the feedback content corresponding to the carrier is included.

  In this embodiment, after receiving the DCI transmitted by the base station, the UE determines a corresponding feedback set based on the DCI, and based on the content indicated by the feedback set, Perform aperiodic feedback for CSI. Among them, the feedback set is indicated by RRC signaling by the base station, and the RRC signaling adopts different indication methods corresponding to different classification schemes. The detailed description is omitted here.

  According to the method of this embodiment, the UE performs the corresponding CSI aperiodic feedback based on the DCI transmitted from the base station and the feedback set indicated by the higher layer (RRC signaling), and the signaling load is small. And the problem of the large feedback load due to the need to report multiple CSI information corresponding to different transmission points and interference temporary during CoMP joint transmission, the flexibility of feedback and the signaling load of the system A good compromise can be realized.

<Scenario that triggers aperiodic feedback in a common search space>
Example 13
Embodiments of the present invention further provide a method for triggering aperiodic feedback during CoMP transmission, which triggers CSI aperiodic feedback in a common search space. FIG. 18 is a flowchart of the method. As shown in FIG. 18, the method includes the following steps.

  Step 1801: The base station transmits dynamic control information (DCI) to the UE, so that the UE determines the corresponding channel based on the DCI and the preset feedback contract information corresponding to the DCI. Performs aperiodic feedback of state information.

  In the present embodiment, the preset feedback execution information corresponding to the DCI is, for example, feedback of all CSIs of the first non-zero power CSI-RS resource, or of the aperiodic feedback CSI set. Feed back the first CSI of them, or feed back the first CSI of the triggered aperiodic feedback CSI set.

  In this embodiment, when aperiodic feedback is triggered in the common search space, only one bit of DCI information is used because aperiodic feedback is triggered in order to satisfy the limit on the number of signaling bits. Among them, 0 indicates that an aperiodic report is not triggered, and 1 indicates that an aperiodic report is triggered. Among them, “1” has a plurality of types of instruction methods, and is, for example, a feedback set 1 configured by an upper layer. The feedback set 1 can be similarly classified by the classification method of the first embodiment, and the specific upper layer instruction method can similarly adopt the method of the first embodiment, for example, different. It can be realized by adopting different RRC signaling designs corresponding to the classification method. In other words, the method of the first embodiment can also be applied to a scenario in which aperiodic feedback is triggered in the common search space. The difference from the first embodiment is that, in the first embodiment, the DCI instructs non-periodic feedback with 2-bit information, but under the scenario of this embodiment, the DCI is non-periodic with 1-bit information. It is to give feedback. However, according to the feedback set of aperiodic feedback, the present embodiment can use the method of the first embodiment as it is. In the first embodiment, the feedback set classification and the feedback set upper layer instruction method are described in detail, and thus detailed description thereof is omitted here.

  In the present embodiment, since the UE uses the common search space to trigger the aperiodic report, it is considered that the channel state of the UE may be deteriorated. Sometimes the actual transmission of the UE needs to adopt a robust transmission scheme, for example, return to the single cell transmission scheme; or the UE is in the RRC reconfiguration state and in the RRC reconfiguration process, the measurement set As the CSI-RS resources of the network change, the CSI in one state is inaccurate; and when the uplink channel state is not ideal, the feedback load that can be supported should not be too large.

  In consideration of the above, in the embodiment of the present invention, the base station and the UE set the feedback execution information corresponding to the DCI in advance, thereby achieving consensus on the content of the aperiodic report. When the base station triggers the UE to perform CSI aperiodic feedback in the common search space by the 1-bit DCI information “1”, the UE is determined based on the feedback execution information set in advance. The CSI information of the cell is fed back. In another embodiment, the feedback commitment information indicates all CSI feedback of the first non-zero power CSI-RS resource, which corresponds to single cell CSI information. In another embodiment, the feedback commitment information indicates feedback of the first CSI information in all CSIs, which corresponds to the single cell interference start CSI information. Thereby, the above-mentioned problem can be solved and an aperiodic report can be triggered effectively.

  In this embodiment, in the case of a combination scenario of CoMP and CA, the instruction on the downlink carrier corresponding to the trigger of the uplink carrier may be an RRC configuration, or a predetermined CSI or TP determined in advance. There may be a resource or an anchor CSI or TP resource that the base station has configured for the user.

  In the method of this embodiment, triggering the UE's aperiodic feedback solves a slight problem when the UE triggers the aperiodic report using the common search space, and the signaling load is small. And a good compromise between the system and the signaling load of the system.

Example 14
The embodiment of the present invention further provides a method of triggering aperiodic feedback during CoMP transmission, which is UE processing corresponding to the method of Embodiment 13. FIG. 19 is a flowchart of the method, and as shown in FIG.
Step 1901: UE receives dynamic control information (DCI) transmitted by a base station;
Step 1902: The UE performs aperiodic feedback of the corresponding channel state information based on the DCI and the preset feedback execution information corresponding to the DCI.

  In this embodiment, the preset feedback execution information corresponding to the DCI is the feedback of all CSIs of the first non-zero power CSI-RS resource or the first of the aperiodic feedback CSI sets. Feedback of one CSI or feedback of the first CSI in a triggered aperiodic feedback CSI set.

  According to the method of this embodiment, since the DCI indicates whether to perform aperiodic feedback only by 1-bit information, when the UE determines the necessity of aperiodic feedback based on the DCI, Based on the common sense achieved, the corresponding aperiodic feedback is performed, which can solve some problems when the UE uses the common search space to trigger the aperiodic report, and the signaling load is small. A good compromise between flexibility and system signaling load can be achieved.

  Similar to the thirteenth embodiment, under the scenario, the base station may indicate the feedback content in a manner in which a feedback set is configured in advance in accordance with the 1-bit DCI, and the UE side accordingly. Then, the method of the second embodiment may be adopted to realize aperiodic feedback.

Example 15
Embodiments of the present invention further provide a method for triggering aperiodic feedback during CoMP transmission, which also triggers aperiodic feedback in a common search space. FIG. 20 is a flowchart of the method. As shown in FIG. 20, the method includes the following steps.

  Step 2001: The base station transmits dynamic control information (DCI) and a pre-configured anchor CSI resource to the UE, so that the UE can determine the corresponding channel state based on the DCI and the anchor CSI resource. Provides aperiodic feedback of information.

In this embodiment, the pre-configured anchor CSI resource is indicated by RRC signaling, and the RRC signaling is log ₂ (N) bits or N bits or log ₂ for indicating the anchor CSI resource. (M) bits or M bits, where N is the magnitude of the CoMP measurement set and M is the magnitude of the configured CSI set.

  In this embodiment, the base station configures one anchor CSI resource in advance, and this anchor CSI resource is used in particular for triggering aperiodic feedback, particularly for triggering aperiodic feedback in a common space. Used for. Among them, the anchor CSI resource can be selected by the base station based on RSRP (Reference Signal Receiving Power) and / or RSRQ (Reference Signal Receiving Quality). Examples are not limited to this. It may be at least one CSI resource corresponding to one non-zero power CSI-RS, and may be at least one CSI resource of an aperiodic feedback CSI set.

  In this embodiment, the anchor CSI resource may be indicated by RRC signaling. In one embodiment, the CSI resources are differentiated based on a triggered transmission point TP (non-zero power CSI-RS), where the RRC signaling is triggered by log2 (N) bits. TP (non-zero power CSI-RS), which allows the UE to determine the anchor CSI resource among the CSI resources corresponding to N TPs (non-zero power CSI-RS). , Of which N is the magnitude of the CoMP measurement set; or the RRC signaling indicates the anchor CSI resource by N bits, and at this time, the indication can be performed in a bitmap format. In another embodiment, the CSI resource is distinguished based on configured CSI, where the RRC signaling is aperiodic feedback by the base station of the anchor CSI resource by log2 (M) bits. May indicate the position in the CSI set configured for M, or may be indicated in the form of M bit bitmaps, where M is the size of the CSI set configured by the base station for aperiodic feedback It is.

  By triggering the UE's aperiodic feedback with the method of this embodiment, it is possible to solve some problems when the UE triggers the aperiodic report in the common search space, and the signaling load is also small.

Example 16
The embodiment of the present invention further provides a method of triggering aperiodic feedback during CoMP transmission, which is UE processing corresponding to the method of Embodiment 15. FIG. 21 is a flowchart of the method. As shown in FIG. 21, the method includes the following steps.

Step 2101: The UE receives dynamic control information (DCI) and pre-configured anchor CSI resources transmitted by the base station;
Step 2102: The UE performs aperiodic feedback of corresponding channel state information based on the DCI and the anchor CSI resource.

  In the present embodiment, the anchor CSI resource is at least one CSI resource corresponding to one non-zero power CSI-RS or at least one CSI resource of a CSI set of aperiodic feedback.

  In this embodiment, the preconfigured anchor CSI resource is indicated by RRC signaling, and the RRC signaling is log2 (N) bits or N bits or log2 (M) for indicating the anchor CSI resource. Or M bits, where N is the magnitude of the CoMP measurement set and M is the magnitude of the configured CSI set. Among them, when the RRC signaling indicates the anchor CSI resource by N bits or M bits, the indication is performed in the form of a bit bitmap.

  According to the method of the present embodiment, when the UE determines the necessity of aperiodic feedback based on the DCI because the DCI indicates the necessity of aperiodic feedback with information of only 1 bit, the UE Based on pre-configured anchor CSI resources, corresponding aperiodic feedback is provided, which can solve some problems when the UE triggers aperiodic reporting using a common search space, The load is small.

  Corresponding to the method of the first embodiment, the embodiment of the present invention further provides a base station, and the principle by which the base station solves the problem is the same as the method of the first embodiment. For such implementation, the implementation of the method of Example 1 can be referred to, and a duplicate description is omitted. FIG. 22 is a block diagram of a base station. As shown in FIG. 22, the base station includes the following.

  Transmission unit 221: Transmits to the UE a 1-bit or 2-bit dynamic control information (DCI) and a feedback set corresponding to the DCI preconfigured by RRC signaling, whereby the UE Based on the feedback set corresponding to the DCI, corresponding acyclic feedback of channel state information is performed.

  Among them, the feedback set corresponding to the DCI pre-configured by RRC signaling is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; or Categorized based on interference type.

  Among them, there is one feedback set corresponding to 1-bit DCI, and there are three or two feedback sets corresponding to 2-bit DCI.

  By triggering the CSI non-periodic feedback of the UE by the base station of the present embodiment, it is possible to realize a good compromise between feedback flexibility and system signaling load.

  Corresponding to the method of the second embodiment, the embodiment of the present invention further provides a user equipment (UE), and the principle by which the UE solves the problem is the same as the method of the second embodiment. For such implementation, the implementation of the method of Example 2 can be referred to, and redundant description is omitted. FIG. 23 is a block diagram of the UE. As shown in FIG. 23, the UE includes the following.

Receiving unit 231: receiving a 1-bit or 2-bit DCI transmitted from the base station and a feedback set corresponding to the DCI preconfigured by RRC signaling;
Reporting unit 232: Based on the DCI and the feedback set corresponding to the DCI, corresponding periodical feedback of channel state information is performed.

  Among them, the feedback set corresponding to the DCI pre-configured by RRC signaling is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; or Categorized based on interference type.

  Among them, there is one feedback set corresponding to 1-bit DCI, and there are three or two feedback sets corresponding to 2-bit DCI.

  According to the UE of the present embodiment, a good compromise between feedback flexibility and system signaling load can be realized by a CSI aperiodic feedback trigger based on a base station.

  Corresponding to the method of the third embodiment, the embodiment of the present invention further provides a base station, and the principle by which the base station solves the problem is the same as the method of the third embodiment. Since the implementation of the method of Example 3 can be referred to, redundant description is omitted. FIG. 24 is a block diagram of the base station. As shown in FIG. 24, the base station includes the following.

First transmission unit 241: Sends a 1-bit or 2-bit first DCI and a feedback set corresponding to the first DCI preconfigured by RRC signaling to the UE, whereby the UE A non-periodic feedback of channel state information of the corresponding carrier aggregation (CA) based on a feedback set corresponding to one DCI and the first DCI;
Second transmission unit 242: transmits a feedback set corresponding to the second DCI, which is configured in advance by 1-bit or 2-bit second DCI and RRC signaling, to the UE, whereby the UE Based on the feedback set corresponding to the second DCI and the second DCI, a corresponding periodical feedback of CoMP transmission (CoMP) channel state information is performed.

  Among them, the feedback set corresponding to the second DCI preconfigured by RRC signaling is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI Or classified based on interference type.

  Among them, there is one feedback set corresponding to the 1-bit first DCI, one feedback set corresponding to the 1-bit second DCI, and 3 feedback sets corresponding to the 2-bit first DCI. There are three or two feedback sets corresponding to a 2-bit second DCI.

  By triggering the aperiodic feedback of the CSI of the UE by the base station of the present embodiment, it is possible to realize a good compromise between feedback flexibility and system signaling load.

  Corresponding to the method of the fourth embodiment, the embodiment of the present invention further provides a user equipment (UE), and the principle by which the UE solves the problem is the same as the method of the fourth embodiment. For such implementation, reference can be made to implementation of the method of Example 4, and repeated explanation is omitted. FIG. 25 is a block diagram of the UE. As shown in FIG. 25, the UE includes the following.

First receiving unit 251: receiving a 1-bit or 2-bit first DCI transmitted from the base station and a feedback set corresponding to the first DCI, which is configured in advance by RRC signaling;
First reporting unit 252: performing aperiodic feedback of corresponding CA channel state information based on the first DCI and a feedback set corresponding to the first DCI;
Second receiving unit 253: receiving a 1-bit or 2-bit second DCI transmitted from the base station and a feedback set corresponding to the second DCI configured in advance;
Second reporting unit 254: Performs aperiodic feedback of the corresponding CoMP channel state information based on the second DCI and the feedback set corresponding to the second DCI.

  Wherein, the pre-configured feedback set corresponding to the second DCI is classified based on the triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI; or Classified based on interference type.

  Among them, there is one feedback set corresponding to the 1-bit first DCI, one feedback set corresponding to the 1-bit second DCI, and three feedback sets corresponding to the 2-bit first DCI. Or two, and three or two feedback sets corresponding to the 2-bit second DCI.

  According to the UE of the present embodiment, a good compromise between feedback flexibility and system signaling load can be realized by a CSI aperiodic feedback trigger based on a base station.

  Corresponding to the method of the fifth embodiment, the embodiment of the present invention further provides a base station, and the principle by which the base station solves the problem is the same as the method of the fifth embodiment. Since the implementation of the method of Example 5 can be referred to, redundant description is omitted. FIG. 26 is a block diagram of the base station. As shown in FIG. 26, the base station includes the following.

  Transmit unit 261: transmits to UE a feedback set corresponding to the DCI pre-configured by 2-bit DCI and RRC signaling, whereby the UE is based on the DCI and the feedback set corresponding to the DCI, Perform aperiodic feedback of the corresponding CA and CoMP channel state information.

  Among them, the feedback set corresponding to the DCI configured in advance is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI.

  Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit corresponding to each triggered transmission point or each configuration CSI.

  Among them, there are three or two feedback sets corresponding to 2-bit DCI.

  By triggering the aperiodic feedback of the CSI of the UE by the base station of this embodiment, it is possible to realize a good compromise between feedback flexibility and system signaling load.

  Corresponding to the method of the sixth embodiment, the embodiment of the present invention further provides a user equipment (UE), and the principle by which the UE solves the problem is the same as the method of the sixth embodiment. For such implementation, the implementation of the method of Example 6 can be referred to, and redundant description is omitted. FIG. 27 is a block diagram of the UE. As shown in FIG. 27, the UE includes the following.

Receiving unit 271: receiving a 2-bit DCI transmitted by the base station and a feedback set corresponding to the DCI preconfigured by RRC signaling;
Reporting unit 272: Based on the DCI and the feedback set corresponding to the DCI, performs aperiodic feedback of the corresponding CA and CoMP channel state information.

  Among them, the feedback set corresponding to the DCI configured in advance is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI.

  Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit corresponding to each triggered transmission point or each configured CSI.

  Among them, there are three or two feedback sets corresponding to 2-bit DCI.

  With the UE of this embodiment, a good compromise between feedback flexibility and system signaling load can be realized by triggering CSI aperiodic feedback from the base station.

  Corresponding to the method of the seventh embodiment, the embodiment of the present invention further provides a base station, and the principle by which the base station solves the problem is the same as the method of the seventh embodiment. Since the implementation of the method of Example 7 can be referred to, redundant description is omitted. FIG. 28 is a block diagram of the base station. As shown in FIG. 28, the base station includes the following.

  Transmission unit 281: Sends a feedback set corresponding to the DCI preconfigured by 2-bit DCI and RRC signaling to the UE, so that the UE is based on the DCI and the feedback set corresponding to the DCI, Perform aperiodic feedback of the corresponding CA and CoMP channel state information.

  Among them, the feedback set corresponding to the DCI configured in advance is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI.

Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit for indicating a configured or activated carrier, and each configured Or a TP indication bit for indicating a triggered TP corresponding to an activated carrier or a CSI indication bit for indicating a configured CSI; or the RRC signaling is configured Or a carrier indication bit for indicating an activated carrier and a carrier indication bit for indicating corresponding to each triggered TP or corresponding to each configured CSI;
Among them, there are three or two feedback sets corresponding to 2-bit DCI.

  By triggering the aperiodic feedback of the CSI of the UE by the base station of this embodiment, it is possible to realize a good compromise between feedback flexibility and system signaling load.

  Corresponding to the method of the eighth embodiment, the embodiment of the present invention further provides a user equipment (UE), and the principle by which the UE solves the problem is the same as the method of the eighth embodiment. Since the implementation contract can refer to the implementation of the method of the eighth embodiment, a duplicate description is omitted. FIG. 29 is a block diagram of the UE. As shown in FIG. 29, the UE includes the following.

Receiving unit 291: receiving a 2-bit DCI transmitted by the base station and a feedback set corresponding to the DCI preconfigured by RRC signaling;
Reporting unit 292: Performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and the feedback set corresponding to the DCI.

  Among them, the feedback set corresponding to the DCI configured in advance is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI.

  Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit for indicating a configured or activated carrier, and each configured Or a TP indication bit for indicating a triggered TP corresponding to an activated carrier or a CSI indication bit for indicating a configured CSI; or the RRC signaling is configured Or a carrier indication bit for indicating an activated carrier and a carrier indication bit for indicating corresponding to each triggered TP or configured CSI.

  Among them, there are three or two feedback sets corresponding to 2-bit DCI.

  According to the UE of the present embodiment, a good compromise between feedback flexibility and system signaling load can be realized by a non-periodic feedback trigger of CSI from the base station.

  Corresponding to the method of the ninth embodiment, the embodiment of the present invention further provides a base station, and the principle by which the base station solves the problem is the same as the method of the ninth embodiment. Since the implementation of the method of Example 9 can be referred to, redundant description is omitted. FIG. 30 is a block diagram of the base station. As shown in FIG. 30, the base station includes the following.

  Transmitting unit 3001: Sending a feedback set corresponding to the DCI that is pre-configured by 2-bit DCI and RRC signaling to the UE, so that the UE is based on the DCI and the feedback set corresponding to the DCI. Thus, aperiodic feedback of the corresponding CA and CoMP channel state information is performed.

  Among them, the feedback set corresponding to the DCI configured in advance is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI.

  Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling includes a carrier indication bit for indicating a triggered aperiodic feedback carrier, and each triggered carrier. Includes a TP indication bit for indicating a triggered TP, or a CSI indication bit of a configured CSI; or the RRC signaling is for indicating a triggered aperiodic feedback carrier It includes a carrier indication bit and a carrier indication bit for indicating that it corresponds to each triggered TP or each configured CSI.

  Among them, there are three or two feedback sets corresponding to 2-bit DCI.

  By triggering aperiodic feedback of the CSI of the UE by the base station of this embodiment, it is possible to realize a good compromise between feedback flexibility and system signaling load.

  Corresponding to the method of the tenth embodiment, the embodiment of the present invention further provides a user equipment (UE), and the principle by which the UE solves the problem is the same as the method of the tenth embodiment. For such implementation, the implementation of the method of Example 10 can be referred to, and redundant description is omitted. FIG. 31 is a block diagram of the UE. As shown in FIG. 31, the UE includes the following.

Receiving unit 311: receiving a 2-bit DCI transmitted by the base station and a feedback set corresponding to the DCI pre-configured by RRC signaling;
Reporting unit 312: Performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and the feedback set corresponding to the DCI.

  Among them, the feedback set corresponding to the DCI configured in advance is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI.

  Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling is indicated by a carrier indication bit for indicating a triggered aperiodic feedback carrier and a triggered carrier. A corresponding TP indication bit for indicating a triggered TP or a CSI indication bit for indicating a configured CSI; or the RRC signaling indicates a carrier of triggered aperiodic feedback And a carrier indication bit for indicating what corresponds to each triggered TP or configured CSI.

  Among them, there are three or two feedback sets corresponding to 2-bit DCI.

  According to the UE of the present embodiment, a good compromise between feedback flexibility and system signaling load can be realized by a CSI aperiodic feedback trigger based on a base station.

  Corresponding to the method of the eleventh embodiment, the embodiment of the present invention further provides a base station, and the principle by which the base station solves the problem is the same as the method of the eleventh embodiment. Since the implementation of the method of Example 11 can be referred to, redundant description is omitted. FIG. 32 is a block diagram of the base station. As shown in FIG. 32, the base station includes the following.

  Transmitting unit 321: transmitting a feedback set corresponding to the DCI preconfigured by 2-bit DCI and RRC signaling to the UE, whereby the UE is based on the DCI and the feedback set corresponding to the DCI, Perform aperiodic feedback of the corresponding CA and CoMP channel state information.

  Among them, the feedback set corresponding to the DCI configured in advance is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI.

  Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling corresponds to a carrier indication bit for indicating a triggered carrier and all triggered carriers. It includes a TP instruction bit or CSI instruction bit for indicating feedback contents.

  Among them, there are three or two feedback sets corresponding to 2-bit DCI.

  By triggering aperiodic feedback of the CSI of the UE by the base station of this embodiment, it is possible to realize a good compromise between feedback flexibility and system signaling load.

  Corresponding to the method of embodiment 12, the embodiment of the present invention further provides a user equipment (UE), and the principle by which the UE solves the problem is the same as the method of embodiment 12, and its specifics. For such implementation, reference can be made to implementation of the method of Reference Example 12, and a duplicate description will be omitted. FIG. 33 is a block diagram of the UE. As shown in FIG. 33, the UE includes the following.

Receiving unit 331: receiving a feedback set corresponding to the DCI preconfigured by 2-bit DCI and RRC signaling transmitted by the base station;
Reporting unit 332: Performs aperiodic feedback of the corresponding CA and CoMP channel state information based on the DCI and the feedback set corresponding to the DCI.

  Among them, the feedback set corresponding to the DCI configured in advance is classified based on a triggered transmission point or non-zero power CSI-RS; or classified based on the configured CSI.

  Among them, a feedback set corresponding to the DCI configured in advance is indicated by RRC signaling, and the RRC signaling corresponds to a carrier indication bit for indicating a triggered carrier and all triggered carriers. It includes a TP instruction bit or CSI instruction bit for indicating feedback contents.

  Among them, there are three or two feedback sets corresponding to 2-bit DCI.

  According to the UE of the present embodiment, a good compromise between feedback flexibility and system signaling load can be realized by triggering a non-periodic feedback of CSI from the base station.

  Corresponding to the method of the thirteenth embodiment, the embodiment of the present invention further provides a base station, and the principle by which the base station solves the problem is the same as the method of the thirteenth embodiment. Since the implementation of the method of Example 13 can be referred to, redundant description is omitted. FIG. 34 is a block diagram of the base station. As shown in FIG. 34, the base station includes the following.

  Transmitting unit 341: Sends a 1-bit DCI to the UE, which allows the UE to determine the corresponding channel state information based on the DCI and preset feedback execution information corresponding to the DCI. Perform aperiodic feedback.

  Among them, the preset feedback execution information corresponding to the DCI includes feedback of all CSIs of the first non-zero power CSI-RS resource or the first CSI of the aperiodic feedback CSI set. Or the feedback of the first CSI in the triggered aperiodic feedback CSI set.

  By triggering aperiodic feedback of the CSI of the UE by the base station of this embodiment, it is possible to realize a good compromise between feedback flexibility and system signaling load.

  Corresponding to the method of Embodiment 14, the embodiment of the present invention further provides a user equipment (UE), and the principle by which the UE solves the problem is the same as the method of Embodiment 14, and its specifics. Such an implementation can refer to the implementation of the method of Example 14, and a duplicate description is omitted. FIG. 35 is a block diagram of the UE. As shown in FIG. 35, the UE inclusion includes the following.

Receiving unit 351: receiving a 1-bit DCI transmitted by the base station;
Reporting unit 352: Performs aperiodic feedback of the corresponding channel state information based on the DCI and preset feedback execution information corresponding to the DCI.

  Among them, the preset feedback execution information corresponding to the DCI includes all CSI feedback of the first non-zero power CSI-RS resource or the first one of the aperiodic feedback CSI set. CSI feedback or feedback of the first CSI of a triggered aperiodic feedback CSI set.

  According to the UE of the present embodiment, a good compromise between feedback flexibility and system signaling load can be realized by a CSI aperiodic feedback trigger based on a base station.

  Corresponding to the method of the fifteenth embodiment, the embodiment of the present invention further provides a base station, and the principle by which the base station solves the problem is the same as the method of the fifteenth embodiment. Since the implementation of the method of Example 15 can be referred to, redundant description is omitted. FIG. 36 is a block diagram of the base station. As shown in FIG. 36, the base station includes the following.

  Transmitting unit 361: Sending to the UE an anchor CSI resource pre-configured by 1-bit DCI and RRC signaling, so that the UE is able to transmit the corresponding channel state information based on the DCI and the anchor CSI. Perform periodic feedback.

  Among them, the resource of the anchor CSI configured in advance is at least one CSI resource corresponding to one non-zero power CSI-RS or at least one CSI resource of the aperiodic feedback CSI set.

  Among them, a pre-configured anchor CSI resource is indicated by RRC signaling, and the RRC signaling is log2 (N) bits, N bits, or log2 () for indicating the anchor CSI resource. M) bits or M bits; where N is the size of the CoMP measurement set and M is the size of the CSI set configured by the base station for aperiodic feedback. Among them, when the RRC signaling indicates the anchor CSI resource with N bits or M bits, the instruction is performed in the form of a bitmap.

  By performing non-periodic feedback of the CSI of the UE by the base station of this embodiment, it is possible to realize a good compromise between feedback flexibility and system signaling load.

  Corresponding to the method of Embodiment 16, the embodiment of the present invention further provides a user equipment (UE), and the principle by which the UE solves the problem is the same as the method of Embodiment 16, and its specifics. Such an implementation can refer to the implementation of the method of Example 16, and a duplicate description is omitted. FIG. 37 is a block diagram of the UE. As shown in FIG. 37, the UE includes the following.

Receiving unit 371: receiving anchor CSI resources pre-configured by 1-bit DCI and higher layer signaling transmitted by the base station;
Reporting unit 372: Perform aperiodic feedback of corresponding channel state information based on the DCI and the anchor CSI resource.

  Among them, the pre-configured anchor CSI resource is at least one CSI resource corresponding to one non-zero power CSI-RS or at least one CSI resource of an aperiodic feedback CSI set.

Among them, a pre-configured anchor CSI resource is indicated by RRC signaling, and the RRC signaling indicates log ₂ (N) bits, N bits, or log for indicating the anchor CSI resource. ₂ (M) bits or M bits, where N is the size of the CoMP measurement set and M is the size of the CSI set configured by the base station for aperiodic feedback . Among them, when the RRC signaling indicates the anchor CSI resource by N bits or M bits, the instruction is performed in the form of a bitmap.

  According to the UE of the present embodiment, a good compromise between feedback flexibility and system signaling load can be realized by triggering a non-periodic feedback of CSI from the base station.

  Embodiments of the present invention further provide a computer readable program, of which when executing the program in a base station, the program is transmitted to the computer in the base station according to the embodiments 1, 3, 5, 7, 9 11, 13, 15, the trigger method for aperiodic feedback during CoMP transmission is executed.

  Embodiments of the present invention further provide a storage medium storing a computer-readable program, wherein the computer-readable program is stored in a base station in the first, third, fifth, seventh, ninth, eleventh, thirteenth, 15. The trigger method for aperiodic feedback during CoMP transmission described in 15 is executed.

  Embodiments of the present invention further provide a computer readable program, of which when executing the program in a terminal device, the program is transmitted to the computer in the terminal device according to the second, fourth, sixth, eighth, and tenth embodiments. 12, 14, 16, a trigger method for aperiodic feedback during CoMP transmission is executed.

  Embodiments of the present invention further provide a storage medium storing a computer-readable program, wherein the computer-readable program is stored in a terminal device in a computer according to Embodiments 2, 4, 6, 8, 10, 12, 14, The trigger method for aperiodic feedback during CoMP transmission described in 16 is executed.

  The above-described apparatus and method of the present invention may be realized by hardware, or may be realized by a combination of hardware and software. The present invention also relates to such a computer-readable program, that is, when the program is executed by the logic unit, the logic unit can realize the above-described apparatus or component. Alternatively, the above-described various methods or steps can be realized in the logic unit. The present invention further relates to a storage medium storing the above-mentioned program, for example, a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, and the like.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this embodiment, and all modifications to the present invention belong to the technical scope of the present invention unless departing from the spirit of the present invention.

Claims (11)

A method of triggering aperiodic feedback in CoMP transmission,
The base station transmits to the user equipment (UE) dynamic control information (DCI) and a feedback set corresponding to the pre-configured DCI, and the UE is based on the DCI and the feedback set corresponding to the DCI, Including aperiodic feedback of corresponding channel state information,
The pre-configured feedback set corresponding to the DCI is classified based on the triggered transmission point or non-zero power CSI-RS, or classified based on the configured CSI, or classified based on interference type The way it is. The method of claim 1, comprising
The DCI reuses 1-bit or 2-bit information in the CSI request field in format O or format 4,
When the DCI is 1-bit information, the feedback set is one feedback set corresponding to the DCI information 1;
When the DCI is 2-bit information, the feedback set is three feedback sets corresponding respectively to the DCI information 01, 10 and 11, or the feedback set is two corresponding to the DCI information 10 and 11, respectively. A method that is a feedback set. The method of claim 1, comprising
If the feedback sets are classified based on triggered transmission points or non-zero power CSI-RS, each feedback set corresponds to a CSI set corresponding to the transmission point that needs to be triggered, or a non-zero power CSI. -The method used to indicate the CSI set corresponding to the RS. A method according to claim 2, comprising
The method, wherein the feedback set is indicated by an N-bit bitmap of radio resource control (RRC) signaling, where N is a size of a measurement set for CoMP transmission. The method of claim 2, further comprising:
The base station transmits to the UE a pre-configured interference provision that needs to be fed back to each non-zero-power CSI-RS, and the UE further determines whether the corresponding channel state information is based on the interference provision. Performing a periodic feedback. The method of claim 1, comprising
If the feedback sets are classified based on configured CSI, each feedback set is used to indicate the CSI set that needs to be triggered. The method according to claim 6, wherein
The feedback set is indicated by an M-bit bitmap of RRC signaling, wherein M is a size of a CSI set configured by the base station for aperiodic feedback. The method of claim 1, comprising
If the feedback sets are classified based on interference types, each feedback set is used to indicate a CSI set corresponding to a possible interference type. A method according to claim 8, wherein
The method, wherein the feedback set is indicated by 2 ^(N-1) bits of RRC signaling, where N is the size of the measurement set for CoMP transmission. A base station used to trigger aperiodic feedback of channel state information (CSI) of a user equipment (UE),
A transmission unit for transmitting a feedback set corresponding to the DCI configured in advance by 1-bit or 2-bit dynamic control information (DCI) and RRC signaling to the UE, wherein the UE includes the DCI and the DCI Including a transmitting unit for performing aperiodic feedback of corresponding channel state information based on a feedback set corresponding to
The feedback set corresponding to the DCI pre-configured by RRC signaling is classified based on the triggered transmission point or non-zero power CSI-RS, or based on the configured CSI, or in an interference type Classified based on
The base station has one feedback set corresponding to 1-bit DCI and three or two feedback sets corresponding to 2-bit DCI. A user equipment (UE),
A receiving unit for receiving a feedback set corresponding to the DCI preconfigured by 1-bit or 2-bit DCI and RRC signaling transmitted by the base station; and based on the feedback set corresponding to the DCI and the DCI A reporting unit for performing aperiodic feedback of corresponding channel state information,
The feedback set corresponding to the DCI pre-configured by RRC signaling is classified based on the triggered transmission point or non-zero power CSI-RS, or based on the configured CSI, or in an interference type Classified based on
The UE has one feedback set corresponding to 1-bit DCI and three or two feedback sets corresponding to 2-bit DCI.

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