WO2014008833A1

WO2014008833A1 - Non-periodic channel state information transmission method, device and system

Info

Publication number: WO2014008833A1
Application number: PCT/CN2013/078860
Authority: WO
Inventors: 陈文洪; 彭莹; 高秋彬
Original assignee: 电信科学技术研究院
Priority date: 2012-07-09
Filing date: 2013-07-05
Publication date: 2014-01-16
Also published as: CN103546208B; CN103546208A

Abstract

The present application relates to the field of wireless communications, in particular to a non-periodic channel state information (CSI) transmission method, device and system, for solving the problem of large feedback signaling overhead existed in existing coordinated multi-point (CoMP) transmission. The non-periodic CSI transmission method in an embodiment of the present application comprises: a terminal determines, from all the CSI process sets allocated by a base station for the terminal and notified to the terminal, a CSI process required to be processed this time according to the received instruction information transmitted by the base station; conducting measurement according to each CSI process required to be processed this time to obtain corresponding CSIs; selecting from all CSIs at least one CSI as CSI reporting information, and transmitting the CSI reporting information to the base station. The embodiment of the present application reduces the feedback signaling overhead fed back by a non-periodic CSI and ensures CoMP gain at the same time.

Description

Method, device and system for transmitting aperiodic channel state information The present application claims to be submitted to the Chinese Patent Office on July 9, 2012, the application number is 201210237958.3, and the invention name is "a method and device for transmitting non-periodic channel state information" The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference. TECHNICAL FIELD The present application relates to the field of wireless communications, and in particular, to a method, device, and system for transmitting aperiodic channel state information. BACKGROUND OF THE INVENTION Coordinated Multipoint Transmission/Reception (CoMP) technology refers to cooperation between multiple transmission points separated geographically. Generally, multiple transmission points may be base stations of different cells, or multiple radio radio heads (RRHs) controlled by the same cell base station. Through the cooperative transmission between multiple transmission points, the interference between different transmission points can be effectively reduced, and the throughput of the user terminal, especially the cell edge user terminal, is improved. The downlink multi-point coordinated transmission technology scheme is mainly divided into two categories: Cooperative Scheduling/Cooperative Beamforming (CS/CB) and Joint Processing (Joint Processing).

Cooperative scheduling avoids or reduces the interference between different transmission points by coordinating the time, frequency and space resources between transmission points. The interference of the small interval is the main factor that restricts the performance of the user equipment (User Equipment, UE, also called user terminal). Therefore, cooperative scheduling can improve the performance of the cell edge UE by reducing the interference between cells. Referring to FIG. 1 , through coordinated scheduling of three transmission points, three UEs that may be mutually interfered are scheduled to be mutually orthogonal resources, thereby effectively avoiding interference between transmission points. The cooperative beamforming schedules the shaping directions of multiple UEs in the coordinated cell, so that the beam directions of the UEs of different cells are orthogonal to each other, thereby reducing the interference between each other. Similar to single-cell Multi-User Multiple Input Multiple Output (MU-MIMO) transmission, cooperative beamforming is mainly implemented by the interference suppression processing at the transmitting end. Therefore, in order to suppress the interference of the transmission of the UE to other UEs, it is necessary to obtain the downlink channel information of the coordinated cell on the base station side.

The joint processing scheme includes dynamic transmission point switching and joint transmission. In the dynamic transmission point handover, the base station can dynamically switch the transmission point of the signal to the UE, so that the optimal transmission point is transmitted every time. In order to implement dynamic transmission point switching, the base station needs to obtain channel information of multiple selectable cells through a feedback channel, or obtain channel information of an optimal transmission point. In the joint transmission scheme, multiple transmission points simultaneously transmit data to the UE to enhance the UE receiving signals. Referring to FIG. 2, three transmission points transmit data to one UE on the same resource, and the UE simultaneously receives signals of multiple cells. On the one hand, the superposition of useful signals from multiple cells can increase the amount of signal received by the UE. On the other hand, The interference experienced by the UE is reduced, thereby improving system performance. Such a scheme requires the UE to feed back channel information of multiple cells, and even relative channel information between cells, thereby ensuring that multiple cells can jointly perform scheduling, precoding, and data transmission.

In the Long Term Evolution (LTE-A) system, the UE estimates the channel state information CSI of the base station to the UE according to the Channel State Information-Reference Signal (CSI-RS) configured by the base station, and calculates the channel shield quantity. The channel quality indicator (CQI) information, the rank indicator (RI) information, and the precoding matrix indicator (PMI) information are fed back to the base station; the base station can be triggered by the downlink control information (Downlink Control Information, DCI). The UE performs the reporting of the aperiodic CSI. After receiving the triggering command sent by the base station, the UE feeds back the measured CSI through the Physical Uplink Shared CHannel (PUSCH). If the cell is configured with multiple downlink carriers, the base station also needs to indicate which carrier channel information is fed back in the trigger command.

In order to support coordinated multi-point transmission, the UE needs to measure CSI separately for each transmission point, which mainly depends on the non-zero-power (NZP) CSI-RS and Zero-power (ZP) CSI configured by the base station. -RS to achieve. The NZP CSI-RS is used to measure the downlink channel information of each transmission point to estimate the RI, PMI and CQI; the ZP CSI-RS is used to measure a transmission point or a transmission point pair other than a certain transmission point set. The transmission point or the interference information of the set of transmission points, and thus used for CQI estimation.

Generally, each transmission point needs to measure one or more CSIs, and the CSI that needs to be measured at each transmission point is one NZP CSI-RS corresponding to the transmission point and one or more ZP CSI-RSs that measure different interference information. definite. Each CSI corresponds to one NZP CSI-RS and one ZP CSI-RS that measures interference information. The CSI(s) measured by the NZP CSI-RS of the same transmission point have the same RI and PMI, and different CQIs. For multi-point coordinated transmission, since the UE needs to separately measure CSI for each transmission point, and each transmission point needs to measure multiple CSIs, the UE needs to measure more CSI than the single-point transmission, and the UE needs to The CSCH is reported to transmit more CSI information than the single point. In addition, if the UE is configured with multiple carriers and CoMP is supported on each carrier, the UE needs to measure CSI corresponding to multiple transmission points on each carrier. .

In summary, for multi-point coordinated transmission, it is easy to cause a problem of large feedback signaling overhead due to the need to report the CSI corresponding to each transmission point, so that the limited transmission capacity of PUSCH cannot carry more CSI. SUMMARY OF THE INVENTION The embodiments of the present invention provide a method, a device, and a system for transmitting aperiodic channel state information, which are used to solve the problem of large feedback signaling overhead in existing multipoint coordinated transmission.

The embodiment of the present application provides a method for sending aperiodic channel state information CSI, including:

The terminal configures and notifies the terminal from the base station according to the received indication information sent by the base station to the terminal. In all the CSI process sets, determine the CSI process that needs to be processed this time;

The terminal measures the corresponding CSI according to each CSI process that needs to be processed this time;

The terminal selects at least one CSI from all measured CSIs as information on the CSI, and sends the CSI information to the base station;

Each of the CSI process sets includes at least one CSI process, and each of the CSI processes includes at least one measurement information of a CSI that needs to be measured corresponding to one transmission point.

An embodiment of the present application provides a method for receiving aperiodic channel state information, where the method includes:

The base station notifies the terminal of all the CSI process sets configured by the terminal, and each of the CSI process sets includes at least one CSI process, and each of the CSI processes includes at least one measurement information of the CSI that needs to be measured corresponding to the transmission point;

The base station sends the indication information to the terminal, to indicate that the terminal is configured to determine, according to the indication information, the CSI process that needs to be processed in the current CSI process set configured by the base station for the terminal and notified to the terminal, Corresponding CSI is obtained according to each CSI process that needs to be processed, and at least one CSI is selected from all CSIs as CSI report information;

The base station receives the CSI of the terminal, and performs downlink scheduling and transmission according to the CSI.

An embodiment of the present application provides a terminal for transmitting aperiodic channel state information (CSI), including: a determining module, configured to configure, according to the received indication information sent by the base station, the base station to notify the terminal In all the CSI process sets of the terminal, determine the CSI process to be processed this time;

a processing module, configured to measure, according to each CSI process that needs to be processed, a corresponding CSI;

a sending module, configured to select at least one CSI from all CSIs as information on the CSI, and send the CSI reporting information to the base station;

The embodiment of the present application provides a base station for receiving aperiodic channel state information, including:

a notification module, configured to notify the terminal of all the CSI process sets configured by the terminal, each of the CSI process sets includes at least one CSI process, and each of the CSI processes includes at least one CSI corresponding to the measurement point. Measurement information;

An indication information sending module, configured to send indication information to the terminal, to instruct the terminal to perform aperiodic CSI reporting;

The receiving module is configured to receive the CSI reported by the terminal, and perform downlink scheduling and transmission according to the CSI. The embodiment of the present application provides a transmission system for aperiodic channel state information, including:

a base station, configured to notify a terminal of all CSI process sets configured for the terminal; send indication information to the terminal to instruct the terminal to perform an aperiodic CSI process; and receive CSI on the terminal, and according to the CSI Downstream Scheduling and transmission;

The terminal is configured to determine, according to the indication information sent by the received base station, the CSI process to be processed in the current CSI process set configured by the base station for the terminal; and measure according to each CSI process that needs to be processed this time. Obtaining a corresponding CSI; and selecting at least one CSI from all CSIs as information on the CSI, and transmitting the CSI reporting information to the base station;

In the embodiment of the present application, the terminal determines, according to the received indication information sent by the base station and all the CSI process sets notified by the base station, the CSI process to be processed in this time; and the corresponding CSI is measured according to each CSI process that needs to be processed this time; At least one CSI is selected as the report information in all the CSIs, and the report information is sent to the base station; thereby reducing the feedback signaling overhead of the aperiodic CSI feedback, and also ensuring the gain of the CoMP. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of coordinated scheduling of transmission points in the background art;

2 is a schematic diagram of joint transmission of transmission points in the background art;

3 is a flowchart of a method for transmitting aperiodic CSI according to an embodiment of the present application;

4 is a flowchart of a method for receiving aperiodic CSI according to an embodiment of the present application;

FIG. 5 is a flowchart of a method for transmitting a first aperiodic CSI according to an embodiment of the present application;

6 is a flowchart of a second aperiodic CSI transmission method according to an embodiment of the present application;

7 is a flowchart of a third aperiodic CSI transmission method according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a terminal for transmitting aperiodic CSI according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a base station for receiving aperiodic CSI according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a non-periodic CSI transmission system according to an embodiment of the present application. In the embodiment of the present application, in order to obtain channel state information of multiple transmission points, the base station needs to configure at least one CSI process set for the terminal, and notify the terminal of all CSI process sets configured by the terminal through high-level signaling, etc., where The CSI process set includes at least one CSI process, and each CSI process includes at least one measurement information of the CSI that needs to be measured corresponding to the transmission point;

It should be noted that the measurement information of each CSI is configured by the base station for measuring the CSI of the terminal and notifying the terminal, and the terminal obtains the corresponding CSI according to the measurement information of each CSI that needs to be measured, and the measurement information of each CSI may be Associated with an NZP CSI-RS and a perturbation measurement resource, where the interference measurement resource is configured through ZP CSI-RS of;

The CSI process in a CSI process set may be for the same transmission point (in this case, the NZP CSI-RS in the CSI process set is the same), or may be different for different transmission points (in this case, the CSI process set includes multiple different NZP CSI-RS).

The base station notifies the terminal that each CSI process set configured for the terminal includes the following three methods:

In the first mode, the base station sends a set of all CSI processes configured for the terminal to the terminal;

Correspondingly, the terminal receives all CSI process sets configured by the base station for it.

In a second manner, the base station sends, to the terminal, an index corresponding to each CSI process in each CSI process set configured for the terminal;

Correspondingly, after receiving the index corresponding to each CSI process in each CSI process set sent by the base station, the terminal determines, according to the index, each CSI process in each CSI process set;

Before the base station notifies the terminal of all the CSI process sets in this manner, the base station needs to notify all the CSI processes and the index corresponding to each CSI process to the terminal.

Correspondingly, the terminal may store all the CSI processes sent by the base station and their corresponding indexes in the local database; after receiving the index corresponding to the CSI process in each CSI process set sent by the base station, the terminal obtains the index from the local database according to the index. Find the corresponding CSI process to determine the CSI process included in each CSI process set.

In a third mode, the base station sends, to the terminal, a bit sequence corresponding to each CSI process set configured for the terminal, where each bit in the bit sequence represents a CSI process, and if a bit takes a value of 1, it indicates that The CSI process set includes a CSI process corresponding to the bit. If a bit is 0, the CSI process set does not include the CSI process corresponding to the bit.

Correspondingly, the terminal receives a bit sequence corresponding to each CSI process set, and determines, according to the bit sequence, a CSI process included in the CSI process set;

Correspondingly, the terminal may store all the CSI processes sent by the base station and their corresponding indexes in the local database; after receiving the bit sequence corresponding to each CSI process set sent by the base station, the terminal determines, according to the bit sequence, the inclusion in the set. The index corresponding to the CSI process, and the corresponding CSI process is searched from the local database according to the index, thereby determining the CSI process included in each CSI process set.

It is assumed that the base station sends five CSI processes and their indexes to the terminal, and the terminal stores the five CSI processes and their indexes in the local database. If the CSI process set 1 configured by the base station for the terminal includes the CSI process 1 and the CSI process 3, The base station may send a 5-bit sequence corresponding to the CSI process set 1 to the terminal (eg, 10100, where the first bit of the 5-bit data identifies the CSI process 1, the second bit identifies the CSI process 2, and so on, "1 " indicates that the CSI process set includes the CSI process corresponding to the bit, and "0" indicates that the CSI process set does not include the bit. Corresponding CSI process);

Correspondingly, after receiving the bit sequence sent by the base station, the terminal may determine an index corresponding to the CSI process included in the CSI process set, and search for a corresponding CSI process from the local database according to the determined index, thereby determining each CSI process set. The CSI process included in it.

When configuring a CSI process set, you can configure one CSI process set for one transmission point, or configure one CSI process set for different transmission points. If the terminal activates multiple carriers, and the terminal supports on some or all of the excited carriers. If the base station configures the CSI process set for the terminal, the base station may separately configure a CSI process set for all the carriers supporting the coordinated multi-point transmission of the terminal; the base station may also separately configure a CSI process set for different subframe sets, where Each sub-frame set includes at least one sub-frame, and each sub-frame set corresponds to at least one CSI process set, where the sub-frame set may be configured by the base station for the terminal, or may be agreed by both parties.

The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

Referring to FIG. 3, a method for transmitting aperiodic channel state information according to an embodiment of the present invention includes the following steps:

Step 31: The terminal determines, according to the received indication information sent by the base station, the CSI process that needs to be processed in the current CSI process set configured by the base station for the terminal and notified to the terminal;

Each CSI process set includes at least one CSI process, and each CSI process includes at least one measurement information of the CSI that needs to be measured corresponding to the transmission point;

Step 32: The terminal measures, according to the CSI process that needs to be processed, the corresponding CSI.

Step 33: The terminal selects at least one CSI from all the measured CSIs as the CSI report information, and sends the CSI report information to the base station.

Preferably, the CSI report information includes the index information of the CSI process corresponding to each CSI in the current CSI process to be processed, or the CSI process corresponding to each CSI in all CSI processes that need to be processed on the carrier where the CSI is located. Index information.

In the implementation, the indication information sent by the base station received by the terminal in step 31 includes:

a first selection policy, configured to instruct the terminal to determine, according to the indication content of the indication information, the CSI process to be processed this time; or

a second selection policy, configured to indicate that the terminal is in a pre-agreed CSI process set or a CSI process set corresponding to the pre-agreed carrier set, and determines a CSI process to be processed in this time, where the carrier set includes at least one carrier configured by the terminal And each carrier in each carrier set corresponds to at least one CSI process set.

Specifically, the indication information may occupy 1 bit or 2 bits or 3 bits. The following examples illustrate:

For the first selection policy, the base station may use the indication information of 2 bits or 3 bits to instruct the terminal to determine the CSI process to be processed this time according to the first selection policy;

The indication content of the indication information sent by the base station includes but is not limited to one of the following:

CSI process set index, set transmission point, set NZP CSI-RS, set interference measurement resource and Wave collection index.

The attribute information indicated by the indication information is divided into the following three cases for explanation.

The first case: the indication information includes the first selection policy and the indication content of the indication information is a CSI process collection index;

It is assumed that the base station configures three CSI process sets for the terminal, namely CSI process set 1, CSI process set 2 and CSI process set 3, and the base station uses the 2-bit indication information to indicate the CSI process set index, as shown in Table 2:

Table 2 Of course, the base station can also indicate the different CSI process set indexes by sending 3-bit indication information, which is no longer listed here.

If the indication content indicated by the indication information is the CSI process collection index, the terminal determines the CSI process to be processed in the step 31, including:

The terminal determines the CSI process set corresponding to the CSI process set index from all the notified CSI process sets, and determines all the CSI processes included in the CSI process set to be the CSI process to be processed.

The second case: the indication information includes the first selection policy and the indication content of the indication information is a set transmission point or an NZP CSI-RS or a interference measurement resource;

It is assumed that the base station configures two CSI process sets for the terminal, which are CSI process set 1 and CSI process set 2, respectively. The attribute information indicated by the indication information is set as an example of the NZP CSI-RS, and the base station uses 2 bits. The indication information indicates the CSI process collection index, as shown in Table 3:

In the following, if the indication content of the indication information is the set transmission point, the indication content of the indication information "01" may be "triggering the aperiodic CSI process to the agreed transmission point", that is, the CSI process to be processed this time is All the CSI processes corresponding to the set transmission point; if the indication content of the indication information is the set interference measurement resource, the indication content of the indication information "01" may be "triggering the aperiodic CSI process to the agreed interference measurement resource. ", that is, the CSI that needs to be processed this time. The process is all CSI processes corresponding to the set interference measurement resources.

Certainly, the indication content of the transmitted 2-bit indication information may also be other, for example, "01" indicates that the CSI process to be processed this time is all CSI processes corresponding to the set transmission point, and "10" indicates that the current needs to be processed. The CSI process is all CSI processes corresponding to the set NZP CSI-RS. The "11" indicates that the CSI process that the terminal needs to process this time is all CSI processes corresponding to the set interference measurement resources; List.

Of course, the base station can also send the 3-bit indication information to instruct the terminal to use the first selection policy to determine the CSI process to be processed this time, which is not enumerated here.

If the indication content of the indication information is the set transmission point or the NZP CSI-RS or the interference measurement resource, the terminal determines the CSI process to be processed in the step 31, including:

The terminal determines, from the notified CSI process set, all the CSI processes included in the set transmission point or NZP CSI-RS or the interference measurement resource as the CSI process to be processed this time.

The third case: if the terminal is configured with multiple carriers, and the multi-point coordinated transmission is supported on each carrier, the indication information includes the first selection policy, and the indication content of the indication information is a carrier set index;

Assume that the terminal is configured with three carriers, namely carrier 1, carrier 2 and carrier 3. The base station configures two sets of carriers for the aperiodic CSI process, namely carrier set 1 (including carrier 1 and carrier 2) and carrier set. 2 (Carrier 3), and the base station configures at least one CSI process set for each carrier in each carrier set, and the base station uses the 2-bit indication information to indicate the carrier set index, as shown in Table 4:

Table 4 Of course, the base station can also indicate different carrier set indexes by transmitting 3-bit indication information, which will not be enumerated here.

If the indication content of the indication information is a carrier set index, the terminal determining, in step 31, the CSI process to be processed, includes: determining, by the terminal, a carrier set corresponding to the carrier set index from the set of carriers notified by the base station, and determining the carrier. All the corresponding CSIs in the CSI process set corresponding to each carrier in the set are reported as the CSI process to be processed this time.

For the second selection policy, the base station may use 1 bit of indication information; for example, the base station sends "0" to the terminal to indicate that the terminal does not perform the aperiodic CSI process; sending "1" indicates that the terminal performs according to the agreed CSI process set or carrier set. Aperiodic CSI process. Correspondingly, the determining, by the terminal, the CSI process to be processed according to the agreed CSI process set includes: The terminal uses all the CSI processes corresponding to the agreed CSI process set as the current CSI process to be processed. Correspondingly, the terminal determines, according to the agreed carrier set, that the CSI process to be processed this time includes:

The terminal uses all the CSI processes included in the CSI process set corresponding to each carrier in the agreed carrier set as the CSI process to be processed this time.

In this implementation, for the first selection policy, if the base station separately configures a CSI process set for different subframe sets, where each subframe set includes at least one subframe, and each subframe set corresponds to at least one CSI process set.

The method for determining, by the terminal, the CSI process to be processed in this time may be: for each subframe set, the terminal determines, according to the indication information, the CSI process to be processed in the CSI process set corresponding to the subframe set;

The method for the terminal to measure the corresponding CSI according to the CSI process to be processed by the terminal may be: for each subframe set, the terminal measures corresponding to each CSI process that needs to be processed in the subframe set.

CSI;

The method for the terminal to select at least one CSI from all the CSIs as the CSI report information may be: for each subframe set, the terminal selects at least one CSI from all the CSIs corresponding to the measured subframe set as the subframe set. 4 information on CSI.

Further, before the base station sends the indication information to the terminal, the base station needs to notify all the CSI process sets configured for the terminal to the terminal by using high layer signaling.

In an implementation, in step 33, the terminal selects at least one CSI from all CSIs as the reporting information according to one or a combination of the following manners:

In the first method, the terminal selects at least one CSI corresponding to the at least one interference measurement resource from the measured multiple CSIs according to the different interference measurement resources corresponding to the CSI process to be processed. Information

Specifically, the terminal may group the measured multiple CSIs according to different interference measurement resources, and group the CSIs with the same interference measurement resources into one group; and select multiple CSIs according to the preset selection policy. A set of CSIs is reported as information.

Manner 2: The terminal selects at least one CSI corresponding to at least one NZP CSI-RS according to a preset selection policy, according to different NZP CSI-RSs corresponding to the CSI process to be processed by the terminal, as the CSI report. Information

Specifically, the terminal may group the plurality of CSIs that are measured by different NZP CSI-RSs, and group the same CSIs of the corresponding NZP CSI-RSs; and from multiple sets of CSIs according to a preset selection policy. Select a group of CSIs as the escalation information.

Manner 3: The terminal selects at least one CSI corresponding to the at least one transmission mechanism as the CSI report information according to the preset selection policy, according to the transmission mechanism corresponding to the CSI process to be processed by the terminal; Specifically, the terminal may group the measured multiple CSIs according to the transmission mechanism, and group the CSIs with the same transmission mechanism into one group; and select a group of CSIs from multiple sets of CSIs as the CSI report according to the preset selection policy. Information: The transmission mechanism corresponding to each CSI process is notified to the terminal by the base station, and the transmission mechanism includes but is not limited to one or more of the following: dynamic transmission point handover transmission, 2-point joint transmission, 3-point joint transmission, Single point transmission, 2 points CS/CB and 3 points CS/CB.

And the terminal selects, according to the preset selection policy, at least one CSI corresponding to the at least one carrier as the CSI report information, according to the preset selection strategy, according to the carrier corresponding to the CSI process to be processed by the terminal;

Manner 5: The terminal selects at least one CSI as the CSI report information according to the preset selection policy from the multiple CSIs obtained by all the measurements.

Preferably, the preset selection strategy includes one or a combination of the following:

Method A, the principle of maximum information capacity;

Specifically, a group of CSIs with the largest information capacity is selected from the plurality of groups of CSIs as the information on the CSI; or the CSI with the largest information capacity is selected from all the CSIs as the CSI report information.

The maximum principle of the signal-to-interference and noise ratio (SINR) is adopted. Specifically, the terminal selects a group of CSIs with the largest SINR from multiple sets of CSIs as CSI report information; or selects SINR from all CSIs. The largest CSI is reported as CSI;

Mode C, higher than the set information capacity threshold principle;

Specifically, the terminal selects, from the plurality of sets of CSIs, a set of CSIs whose information capacity is greater than the set information capacity threshold as CSI report information, or selects CSIs that are greater than the set information capacity threshold from all CSIs as the CSI report information; , the principle above the set SINR threshold;

Specifically, the terminal selects a group of CSIs whose SINR is greater than the set SINR threshold as the CSI report information, or selects a CSI that is greater than the set SINR threshold from all the CSIs as the CSI report information.

Manner 6: The terminal selects the CSI corresponding to the CSI process as the CSI report information according to the process index of the CSI process to be processed according to the process index of the CSI process to be processed.

It should be noted that if the terminal is configured with multiple carriers and multiple CSI processes are supported on multiple carriers, since the system does not support cross-carrier selection, the UE needs to select at least one CSI for each carrier. The CSI is used as the report information corresponding to the carrier, and is reported in sequence.

It should be noted that, if the terminal receives the CSI process set separately configured by the base station for different subframe sets, the terminal should perform CSI measurement separately according to the CSI process set corresponding to the different subframe set, and measure from each respective subframe set. At least one CSI is selected as the report information corresponding to the subframe set, and is reported in sequence. The subframe set is pre-configured by the base station, and each subframe set includes at least one subframe. Referring to FIG. 4, a method for receiving aperiodic CSI according to an embodiment of the present invention includes the following steps:

Step 41: The base station informs the terminal of all the CSI process sets configured by the terminal, and each CSI process set includes at least one CSI process, and each CSI process includes at least one measurement information of the CSI that needs to be measured corresponding to the transmission point;

Preferably, if the terminal is configured with multiple carriers, and the terminal supports coordinated multi-point transmission on each carrier, the base station configures at least one CSI process set for each carrier of the terminal; or the base station is part of the carrier of the terminal respectively. Configure at least one CSI process set, such as configuring a CSI process set only for the primary carrier of the terminal.

In the implementation, the base station notifies the terminal that all the CSI process sets configured by the terminal include the following three modes: the base station sends all the CSI process sets configured for the terminal to the terminal; or

The base station sends, to the terminal, an index corresponding to the CSI process in each CSI process set configured by the terminal, so that the terminal determines the corresponding CSI process according to the index corresponding to each CSI process; or

The base station sends a bit sequence corresponding to each CSI process set configured for the terminal to the terminal, so that the terminal determines, according to the bit sequence, the CSI process included in the corresponding CSI process set.

Step 42: The base station sends the indication information to the terminal, to instruct the terminal to perform the aperiodic CSI reporting.

The indication information sent by the base station to the terminal includes:

a second selection policy, configured to instruct the terminal to select a pre-agreed CSI process set or a CSI process set corresponding to the pre-agreed carrier set in the set of all the notified CSI processes, and determine a CSI process to be processed this time, where the carrier set A carrier configured by at least one terminal, and each carrier in each carrier set corresponds to at least one CSI process set.

The indication content of the indication information may be a CSI process set index, a set transmission point, a set NZP CSI-RS, a set interference measurement resource or a carrier set index;

After receiving the indication information sent by the base station, the terminal determines, according to the indication information, the CSI process that needs to be processed from the CSI process set configured and notified by the base station, and the corresponding CSI process to be processed according to the current measurement. CSI, and select at least one CSI from all CSIs as 4 information on the CSI.

Step 43: The base station performs downlink scheduling and transmission according to the CSI reported by the terminal.

It should be noted that, in step 41, the base station may further notify the terminal of the reporting manner of the aperiodic CSI process by using the downlink signaling, where the reporting manner includes: notifying the terminal to report all aperiodic CSIs, or notifying the terminal to report part of the aperiodic CSI.

If the base station notifies the terminal that the reporting mode is to report a part of the aperiodic CSI, the terminal may indicate the CSI that the terminal needs to report at this time.

The implementation scheme of the interaction between the base station and the terminal side is as follows: First, the base station configures at least one CSI process set for each terminal by using high layer signaling;

Correspondingly, the terminal receives at least one CSI process set indicated by the base station;

Then, the base station sends the indication information through the aperiodic CSI trigger signaling in the DCI to instruct the terminal to perform the aperiodic CSI process;

Correspondingly, the terminal receives the indication information sent by the base station, and determines the CSI process to be processed according to the indication information, and performs measurement according to the determined CSI process; the terminal selects at least one CSI from the measured CSIs as the CSI report information, and The CSI reporting information further includes index information of the CSI processes corresponding to each CSI in all the determined CSI processes;

Finally, the base station determines downlink channel information corresponding to the transmission point and/or the carrier according to the CSI report information of the terminal, so as to perform corresponding downlink scheduling and transmission.

For the specific implementation of the base station and the terminal in the implementation of the interaction, refer to the description of the method on the base station and the terminal side, and details are not described herein.

The transmission method of the aperiodic CSI in the embodiment of the present invention will be described in detail below with reference to the following three specific embodiments. Embodiment 1: Referring to FIG. 5, the transmission method of the aperiodic CSI in this embodiment includes the following steps:

Step 51: The base station configures three CSI process sets for the aperiodic CSI process for the UE by using the high layer signaling, where the three CSI process sets respectively correspond to: dynamic transmission point switching, 2-point joint transmission, and 3-point joint transmission. Transmission mechanism

Specifically, the base station notifies the UE in advance of all the CSI processes that need to be measured, and uses a bitmap in each CSI process set to indicate the CSI process included in the CSI process set.

Step 52: The base station instructs the UE to perform the aperiodic CSI process by using the 2-bit aperiodic CSI triggering signaling in the DCI, and indicates the CSI process to be measured by the aperiodic CSI process through the three trigger states corresponding to the 2-bit data. An index that is aggregated in a set of three pre-configured CSI processes; wherein the indication contents of the two bits of data are as shown in Table 2.

Step 53: The UE receives three sets of CSI processes configured by the base station.

Step 54: The UE receives 2-bit aperiodic CSI trigger signaling sent by the base station, and indicates according to the trigger signaling.

The CSI process set index, the CSI process set corresponding to the CSI process set index is determined from the foregoing three CSI process sets, and all the CSI processes in the determined CSI process set are used as the CSI process to be processed this time; and the determined CSI is respectively determined. Each CSI process in the process set is measured, and the CSI corresponding to each CSI process is obtained.

For example, if the 2-bit data received by the UE is "01", the corresponding indication content is an aperiodic CSI process that triggers the CSI process set 1 of the high-level configuration, that is, the corresponding CSI process set in which the UE indexes the CSI process set to 1. All the CSI processes are used as the CSI processes to be processed, and each CSI process in the CSI process set 1 is measured to obtain the CSI corresponding to each CSI process.

Step 55: The UE measures the measurement of the interference measurement resource used in the measurement process from all the measured CSIs. The obtained CSIs are grouped, and the CSIs corresponding to the same interference measurement resource are grouped into one group; and the CSIs with the largest information capacity among the plurality of groups of CSIs are determined as the upper information;

For example, if the CSI process set 1 includes NZP CSI-RSs of 3 transmission points and different interference measurement resources (where each of the interference measurement resources is used to measure the transmission point corresponding to the interference measurement resource) The transmission point is irritated by the transmission point. The UE measures three CSIs according to each pair of NZP CSI-RS and the interference measurement resources. The UE divides the three CSIs obtained by the measurement into three groups, and compares the three. The information capacity of the group CSI, the CSI with the largest information capacity as the upper information, and the determined reporting information and the index information of the CSI processes corresponding to each CSI in the three CSI processes in the reporting information. Reported to the base station.

Step 56: The base station acquires downlink channel information of the CSI corresponding transmission point according to the CSI reported by the UE and the index information of the corresponding CSI process, so as to perform corresponding downlink scheduling and transmission.

Implementation 2: Referring to FIG. 6, the transmission method of the aperiodic CSI in this embodiment includes the following steps:

Step 61: The base station configures, by using the high layer signaling, two CSI process sets for the aperiodic CSI process, where the two CSI process sets respectively contain CSI processes corresponding to different transmission points, that is, each CSI process set corresponds to The NZP CSI-RS is different;

Specifically, the base station notifies the UE in advance of all the CSI processes to be processed, and indicates, in each CSI process set, a CSI process included in each CSI process set by using a bitmap manner.

Step 62: The base station triggers the UE to perform the aperiodic CSI process by using the 2-bit aperiodic CSI triggering signaling in the DCI, and indicates the CSI process set index corresponding to the CSI process to be processed by the three triggering states in the triggering bit respectively. And reporting that the UE uses the CSI process corresponding to the agreed NZP CSI-RS to report. The indication contents of these two-bit non-periodic CSI trigger signaling are shown in Table 3.

Step 63: The UE receives two sets of CSI processes configured by the base station.

Step 64: After receiving the 2-bit aperiodic CSI triggering signaling of the base station, the UE determines the CSI process to be processed according to the information of the CSI process set indicated by the 2-bit aperiodic CSI trigger signaling; respectively, determining the CSI process Make measurements;

For example, if the 2-bit aperiodic CSI trigger signaling is "01", it indicates that the UE will agree on the CSI process set.

All CSI processes corresponding to the NZP CSI-RS are taken as the CSI processes to be processed this time and measured separately.

Step 65: The UE groups the measured CSI according to the transmission mechanism, and groups the CSIs with the same transmission mechanism into one group, and selects an optimal CSI from each group of CSIs as the upper information.

For example, the determined CSI process to be processed this time includes the agreed NZP CSI-RS and three different interference measurement resources, corresponding to three different transmission mechanisms (single point transmission, 2 points CS/CB, 3 points). CS/CB), the UE divides the measured CSI into three groups according to the transmission mechanism; the UE compares the information capacity sizes corresponding to the three CSIs, and the CSI with the largest information capacity and its corresponding CSI process are determined in the current need. The index in the three processed CSI processes is reported to the base station. Step 66: The base station learns the downlink channel information of the reported CSI corresponding transmission point according to the reported CSI and the index of the corresponding CSI process, and performs corresponding downlink scheduling and transmission.

Implementation 3: Referring to FIG. 7, the transmission method of the aperiodic CSI in this embodiment includes the following steps:

Step 71: The base station configures two sets of carriers for the aperiodic CSI process for the UE by using the high layer signaling. Specifically, the UE indicates the activated carrier in each carrier set by using a bitmap manner, where each bit in the Bitmap represents One carrier, if one bit takes a value of 1, the carrier it represents is the active carrier, otherwise it is the inactive carrier.

Step 72: The base station instructs the UE to perform an aperiodic CSI process by using 2-bit aperiodic CSI trigger signaling in the DCI, and indicates the carrier used in the aperiodic CSI process by using three trigger states of the 2-bit aperiodic CSI trigger signaling. The carrier set index is set in two preset carrier sets, or the UE is instructed to perform the aperiodic CSI process by using the agreed carrier set (ie, the current carrier). The indication content of the 2-bit aperiodic CSI trigger signaling is shown in Table 4.

Step 73: The UE receives two sets of carriers used by the base station for the aperiodic CSI process.

Step 74: After receiving the 2-bit aperiodic CSI trigger signaling of the base station, the UE obtains the carrier set corresponding to the current aperiodic CSI process according to the information indicated by the 2-bit aperiodic CSI trigger signaling, and each of the determined carrier sets The CSI process set corresponding to the carrier is used as the CSI process to be processed by the aperiodic CSI process, and is separately measured based on the determined CSI process to be processed on each carrier;

For example, if the 2-bit aperiodic CSI trigger signaling is "10", the UE is instructed to perform CSI measurement on all CSI process sets on the high-level configured carrier set 1.

Step 75: The UE selects at least one CSI for each carrier as the report information of the carrier, and reports the report information corresponding to the carrier set 1 to the base station in turn, and each of the CSIs measured by the UEs in the carrier set 1 The index of the CSI process corresponding to the report information corresponding to the carrier is also reported to the base station;

For example, if carrier set 1 includes carrier 1 and carrier 2, the UE performs the following operations for carrier 1 and carrier 2 respectively:

The UE groups the CSIs measured on the current carrier according to the used interference measurement resources, and divides the CSIs with the same interference measurement resources into one group;

The UE selects an optimal set of CSIs from the plurality of sets of CSIs according to the principle of maximum information capacity as the upper information of the current carrier;

The UE feeds back the report information of the current carrier and the corresponding index of the corresponding CSI process in the CSI process set of the current carrier to the base station.

Specifically, the UE reports the reporting information of carrier 1 and carrier 2 and their corresponding indexes in turn.

Step 76: The base station acquires the downlink channel information of the reported CSI corresponding transmission point and the carrier according to the CSI reported by the UE and the index of the corresponding CSI process, so as to perform corresponding downlink scheduling and transmission. Based on the same inventive concept, the embodiment of the present invention further provides a terminal for transmitting aperiodic channel state information. The principle of the terminal solving the problem is similar to the method for transmitting the aperiodic channel state information, and therefore the implementation of the terminal is implemented. See the implementation of the method, and the repetition will not be repeated.

Referring to FIG. 8, the terminal for transmitting the aperiodic channel state information CSI according to the embodiment of the present invention includes: a determining module 81, configured to configure, according to the received indication information sent by the base station, the base station to notify the terminal In all CSI process sets, determine the CSI process that needs to be processed this time;

The processing module 82 is configured to measure, according to each CSI process that needs to be processed, a corresponding CSI;

The sending module 83 is configured to select at least one CSI from all CSIs as the reporting information, and send the reporting information to the base station;

Each CSI process set includes at least one CSI process, and each CSI process includes at least one measurement information of the CSI to be measured corresponding to one transmission point.

Preferably, the reporting information further includes: index information of all CSI processes that are required to be processed by the CSI corresponding to each CSI, or all CSIs that need to be processed on the carrier where the CSI corresponding to each CSI is located. Index information in the process.

Preferably, the indication information sent by the base station to the terminal includes:

a second selection policy, configured to instruct the terminal to select a pre-agreed CSI process set or a CSI process set corresponding to the pre-agreed carrier set in the set of all the notified CSI processes, and determine a CSI process to be processed this time, where the carrier set At least one carrier configured by the terminal is included, and each carrier in each carrier set corresponds to at least one CSI process set.

Preferably, the determining module 81 is specifically configured to:

When the indication information includes the first selection policy, and the indication content of the indication information is a CSI process set index, the CSI process set corresponding to the CSI process set index is determined from all the notified CSI process sets, and the determined CSI process set is determined. All the corresponding CSI processes in this process are the CSI processes that need to be processed;

When the indication information includes the first selection policy, and the indication content of the indication information is the set transmission point, all CSI processes corresponding to the transmission point are determined from all the notified CSI process sets as the CSI process to be processed this time; When the indication information includes the first selection policy, and the indication content of the indication information is NZP CSI-RS, all CSI processes corresponding to the NZP CSI-RS are determined from all the notified CSI process sets as the CSI process to be processed this time;

When the indication information includes the first selection policy, and the indication content of the indication information is a interference measurement resource, all CSI processes corresponding to the interference measurement resource are determined from all the notified CSI process sets as the CSI process to be processed this time. ; When the indication information includes the first selection policy, and the indication content of the indication information is a carrier set index, determining a carrier set corresponding to the carrier set index from the set of carriers notified by the base station, and determining each carrier in the determined carrier set All the corresponding CSI processes in the corresponding CSI process set are used as the CSI processes to be processed this time.

Preferably, the determining module 81 is specifically configured to:

When the indication information includes the second selection policy, all corresponding ones of the pre-agreed CSI process sets are

The CSI process is used as the CSI process to be processed this time; or,

All CSI processes in the CSI process set corresponding to each carrier in the pre-agreed carrier set are used as the CSI process to be processed this time.

If the base station separately configures a CSI process set for different subframe sets, the subframe set includes at least one subframe, and each of the subframe sets corresponds to at least one CSI process set;

For each subframe set, the determining module 81 is further configured to: determine, according to the indication information, a CSI process that needs to be processed in the CSI process set corresponding to the subframe set; the processing module 82 is further configured to: according to the subframe set Each CSI process that needs to be processed is measured to obtain a corresponding CSI; and the sending module 83 is further configured to: select at least one CSI from all measured CSIs corresponding to the measured subframe set as the CSI of the subframe set. information.

Preferably, the sending module 83 is specifically configured to:

Selecting, according to the preset selection policy, at least one CSI corresponding to the at least one interference measurement resource according to the preset selection policy, according to different interference measurement resources corresponding to the CSI process to be processed, as the CSI report information; or

Selecting at least one CSI corresponding to the at least one NZP CSI-RS as the CSI report information according to the preset selection policy, according to the different NZP CSI-RSs corresponding to the CSI process to be processed; or

According to the transmission mechanism corresponding to the CSI process to be processed, at least one CSI corresponding to the at least one transmission mechanism is selected from the plurality of measured CSIs according to the preset selection policy as the information on the CSI; or

According to the carrier corresponding to the CSI process to be processed, at least one CSI corresponding to the at least one carrier is selected as the CSI report information according to the preset selection policy, and the CSI report information is obtained from all the measurements. Selecting at least one CSI as the CSI report information according to the preset selection policy in multiple CSIs; or

According to the process index of the CSI process to be processed, the CSIs of the at least one CSI process are selected as the CSI report information.

The principle of maximum information capacity;

Signal-to-noise ratio SINR maximum principle;

Above the set information capacity threshold principle; Above the set SINR threshold principle.

Based on the same inventive concept, an embodiment of the present invention further provides a base station for receiving aperiodic channel state information. Since the principle of the base station solving the problem is similar to the method for receiving the aperiodic channel state information, the implementation of the base station is performed. See the implementation of the method, and the repetition will not be repeated.

Referring to FIG. 9, a base station for receiving aperiodic channel state information according to an embodiment of the present invention includes:

The notification module 91 is configured to notify the terminal of all the CSI process sets configured by the terminal, where each CSI process set includes at least one CSI process, and each CSI process includes at least one measurement information of the CSI that needs to be measured corresponding to at least one transmission point. ;

The indication information sending module 92 is configured to send the indication information to the terminal, to indicate that the terminal determines, according to the indication information, from all the CSI process sets configured by the base station for the terminal and notified to the terminal, to determine that the current needs to be processed. The CSI process determines the corresponding CSI according to each CSI process that needs to be processed, and selects at least one CSI from all CSIs as the information on the CSI;

The receiving module 93 is configured to receive the CSI reported by the terminal, and perform downlink scheduling and transmission according to the CSI.

Preferably, the indication information includes:

Wherein, when the indication information includes the first selection policy, the indication content of the indication information may be a CSI process set index, a set transmission point, a set NZP CSI-RS, a set interference measurement resource or a carrier set index.

Preferably, the notification module 91 is specifically configured to:

Send the terminal a collection of all CSI processes configured for it; or,

Sending, to the terminal, an index corresponding to the CSI process in each CSI process set configured for the terminal, so that the terminal according to the terminal

The index corresponding to the CSI process determines the corresponding CSI process; or,

Sending, to the terminal, a bit sequence corresponding to each CSI process set configured for the terminal, so that the terminal determines the CSI process included in the corresponding CSI process set according to the bit sequence.

Preferably, the notification module 91 is further configured to:

If the terminal activates multiple carriers, and the terminal supports coordinated multi-point transmission on some or all of the activated carriers, at least one CSI process set is configured for all carriers supporting the coordinated multi-point transmission of the terminal.

Preferably, the notification module 91 is further configured to:

Configuring a CSI process set for each of the different subframe sets, where each subframe set includes at least one subframe, And each subframe set corresponds to at least one CSI process set, where the subframe set is configured by the base station for the terminal or agreed by both parties.

Referring to FIG. 10, a transmission system for aperiodic channel state information according to an embodiment of the present invention includes:

The base station 10 is configured to notify the terminal of all the CSI process sets configured by the terminal, and send the indication information to the terminal to instruct the terminal to perform the aperiodic CSI process; and receive the CSI reported by the terminal, and perform downlink scheduling and transmission according to the CSI; And determining, according to the received indication information sent by the base station, the CSI process that needs to be processed in the current CSI process set configured by the base station for the terminal; and determining, according to the CSI process that needs to be processed, the corresponding CSI; Selecting at least one CSI from the measured CSIs as the reporting information, and sending the reporting information to the base station;

For the implementation of the method in the transmission system of the embodiment of the present invention, refer to the implementation of the method shown in Figure 4. For the implementation of the terminal 20 in the transmission system, refer to the implementation of the method shown in Figure 3, and details are not described herein.

In the embodiment of the present invention, the terminal determines the CSI process to be processed according to the received indication information sent by the base station and all the CSI process sets notified by the base station; and obtains the corresponding CSI according to each CSI process that needs to be processed this time; At least one CSI is selected as the CSI report information in the CSI, and the report information is sent to the base station; thereby reducing the feedback signaling overhead of the aperiodic CSI feedback, and also ensuring the gain of the CoMP, and the embodiment of the present invention can also support the simultaneous Coci corresponding to CoMP on multiple carriers to support CoMP on multiple carriers.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the application can be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the application can be in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The device is implemented in a flow or a flow or a block diagram of a block or multiple The function specified in the box.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the present application has been described, those skilled in the art can make additional changes and modifications to the embodiments once they are aware of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Therefore, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

Rights request

1. A method of sending aperiodic channel state information CSI, characterized in that the method includes:

The terminal determines the CSI process that needs to be processed this time from the set of all CSI processes configured by the base station for the terminal and notified to the terminal according to the received instruction information sent by the base station;

The terminal measures and obtains the corresponding CSI based on each CSI process that needs to be processed this time;

The terminal selects at least one CSI from all CSIs as CSI upper information, and sends the CSI reporting information to the base station;

Each of the CSI process sets includes at least one CSI process, and each of the CSI processes includes at least measurement information of at least one CSI that needs to be measured corresponding to one transmission point.

2. The method of claim 1, wherein before the terminal receives the instruction information sent by the base station, it further includes:

The terminal receives all CSI process sets configured for it by the base station; or,

The terminal receives the index corresponding to the CSI process in each CSI process set configured by the base station, and determines the corresponding CSI process according to the index corresponding to the CSI process; or,

The terminal receives the bit sequence corresponding to each CSI process set configured by the base station, and determines the CSI process included in the corresponding CSI process set according to the bit sequence.

3. The method of claim 1, wherein the indication information includes:

The first selection strategy is used to instruct the terminal to determine the CSI process that needs to be processed this time based on the indication content of the indication information; or,

The second selection strategy is used to instruct the terminal to select a pre-agreed CSI process set or a CSI process set corresponding to a pre-agreed carrier set among all notified CSI process sets, and determine the CSI process that needs to be processed this time, wherein, The carrier set includes at least one carrier configured by the terminal, and each carrier in each of the carrier sets corresponds to at least one CSI process set.

4. The method of claim 3, wherein when the indication information includes the first selection strategy, and the indication content of the indication information is a CSI process set index, the terminal determines that this time The CSI processes handled include:

The terminal determines the CSI process set corresponding to the CSI process set index from all notified CSI process sets, and uses all CSI processes included in the determined CSI process set as the CSI processes that need to be processed this time; when the When the indication information includes the first selection strategy, and the indication content of the indication information is the set transmission point, the terminal determines that the CSI processes that need to be processed this time include:

The terminal determines the operations of all CSI processes corresponding to the set transmission point from the set of all notified CSI processes. It is the CSI process that needs to be processed this time;

When the indication information includes the first selection strategy, and the indication content of the indication information is non-zero power channel state information reference signal NZP CSI-RS, the terminal determines that the CSI processes that need to be processed this time include:

The terminal determines all CSI processes corresponding to the NZP CSI-RS from the set of all notified CSI processes as the CSI processes that need to be processed this time;

When the indication information includes the first selection strategy, and the indication content of the indication information is interference measurement resources, the terminal determines that the CSI processes that need to be processed this time include:

The terminal determines all CSI processes corresponding to the interference measurement resources from the set of all notified CSI processes as the CSI processes that need to be processed this time;

When the indication information includes the first selection strategy, and the indication content of the indication information is a carrier set index, the terminal determines that the CSI processes that need to be processed this time include:

The terminal determines a carrier set corresponding to the carrier set index 1 from the carrier set notified by the base station, and uses all CSI processes included in the CSI process set corresponding to each carrier in the determined carrier set as the current The number of CSI processes that need to be processed.

5. The method of claim 3, wherein when the indication information includes the second selection strategy, the terminal determines that the CSI processes that need to be processed this time include:

The terminal uses all CSI processes included in the pre-agreed CSI process set as the CSI processes that need to be processed this time; or

The terminal uses all CSI processes included in the CSI process set corresponding to each carrier in the pre-agreed carrier set as the CSI processes that need to be processed this time.

6. The method of claim 3, wherein the base station configures CSI process sets for different subframe sets, wherein the subframe set includes at least one subframe, and each of the subframes The frame set corresponds to at least one CSI process set;

The terminal determines that the CSI processes that need to be processed this time include:

For each subframe set, the terminal determines the CSI process that needs to be processed this time in the CSI process set corresponding to the subframe set according to the indication information;

The terminal measures the corresponding CSI based on each CSI process that needs to be processed this time, including:

For each subframe set, the terminal measures and obtains the corresponding CSI based on each CSI process that needs to be processed this time in the subframe set;

The terminal selects at least one CSI from all CSIs as the CSI upper information. The information includes:

For each subframe set, the terminal selects at least one CSI from all measured CSIs corresponding to the subframe set as the CSI upper information of the subframe set.

7. The method according to any one of claims 1 to 6, characterized in that the terminal selects at least A piece of CSI, as CSI upper information, includes one or a combination of the following:

According to the different interference measurement resources corresponding to the CSI process that needs to be processed this time, the terminal selects at least one CSI corresponding to at least one interference measurement resource from the measured multiple CSIs according to a preset selection strategy as the CSI.

4gen information; or,

According to the different NZP CSI-RS corresponding to the CSI process that needs to be processed this time, the terminal selects at least one CSI corresponding to at least one NZP CSI-RS from the measured multiple CSIs according to a preset selection strategy as the CSI.

4gen information; or,

According to the transmission mechanism corresponding to the CSI process that needs to be processed this time, the terminal selects at least one CSI corresponding to at least one transmission mechanism from the measured multiple CSIs according to a preset selection strategy as the CSI upper information; or, According to the carrier corresponding to the CSI process that needs to be processed this time, the above terminal obtains multiple measurements from all carriers.

Select at least one CSI corresponding to at least one carrier in the CSI according to a preset selection strategy as the CSI reporting information; or,

The terminal selects at least one CSI from all measured multiple CSIs according to a preset selection strategy as CSI reporting information; or,

According to the process index of the CSI process that needs to be processed this time, the terminal selects the CSI corresponding to at least one CSI process as the CSI reporting information from the measured multiple CSIs in ascending order according to the process index of the corresponding CSI process.

8. The method of claim 7, wherein the preset selection strategy includes one or a combination of the following:

The principle of maximizing information capacity;

Signal-to-noise ratio The principle of maximizing SINR;

The principle of being higher than the set information capacity threshold;

above the set SINR threshold.

9. The method of claim 1, wherein the CSI reporting information further includes: index information of the CSI process corresponding to each CSI in all CSI processes that need to be processed this time, or each CSI Index information of all CSI processes that the corresponding CSI process needs to process on the carrier where it is located.

10. A method for receiving aperiodic channel state information, characterized in that the method includes:

The base station notifies the terminal of all CSI process sets configured for it, each of the CSI process sets includes at least one CSI process, and each of the CSI processes includes at least measurement information of at least one CSI that needs to be measured corresponding to one transmission point;

The base station sends indication information to the terminal to instruct the terminal to determine the CSI process that needs to be processed this time from the set of all CSI processes configured by the base station for the terminal and notified to the terminal based on the indication information, According to the measurement of each CSI process that needs to be processed this time, the corresponding CSI is obtained, and at least one CSI is selected from all CSI as the CSI reporting information; The base station receives the CSI on the terminal, and performs downlink scheduling and transmission according to the CSI.

11. The method of claim 10, wherein the base station notifies the terminal that the set of all CSI processes configured for it includes:

The base station sends to the terminal a set of all CSI processes configured for it; or,

The base station sends the index corresponding to the CSI process in each CSI process set configured for the terminal to the terminal, so that the terminal determines the corresponding CSI process based on the index corresponding to the CSI process; or,

The base station sends the bit sequence corresponding to each CSI process set configured for the terminal to the terminal, so that the terminal determines the CSI process included in the corresponding CSI process set based on the bit sequence.

12. The method of claim 10, wherein if the terminal activates multiple carriers, and the terminal supports multi-point coordinated transmission on some or all of the activated carriers;

The base station notifies the terminal that the set of all CSI processes configured for it includes:

The base station configures at least one CSI process set for all carriers of the terminal that support multi-point coordinated transmission.

13. The method of claim 10, wherein the base station configures a CSI process set for different subframe sets, wherein the subframe set includes at least one subframe, and each of the subframes The frame set corresponds to at least one CSI process set.

14. The method of claim 10, wherein the indication information includes:

15. The method of claim 14, wherein the indication content of the indication information is a CSI process set index, a set transmission point, a set NZP CSI-RS, a set interference measurement resource, or Carrier set index.

16. A terminal for sending aperiodic channel state information CSI, characterized in that the terminal includes: a determining module configured to configure and configure the terminal from the base station according to the received instruction information sent by the base station. Among the set of all CSI processes notified to the terminal, determine the CSI process that needs to be processed this time;

The processing module is used to measure and obtain the corresponding CSI based on each CSI process that needs to be processed this time;

A sending module, configured to select at least one CSI from all CSIs as CSI upper information, and send the CSI reporting information to the base station;

17. The terminal according to claim 16, wherein the indication information includes:

18. The terminal according to claim 17, characterized in that the determining module is specifically used to:

When the indication information includes the first selection strategy, and the indication content of the indication information is a CSI process set index, determine the CSI process set corresponding to the CSI process set index from all notified CSI process sets, And all the corresponding CSI processes in the determined CSI process set are the CSI processes that need to be processed this time;

When the indication information includes the first selection strategy, and the indication content of the indication information is a set transmission point, all CSI processes corresponding to the transmission point are determined from the set of all notified CSI processes as this time. CSI processes that need to be processed;

When the indication information includes the first selection strategy, and the indication content of the indication information is NZP CSI-RS, determine all CSI processes corresponding to the NZP CSI-RS from the set of all notified CSI processes as The CSI process that needs to be processed this time;

When the indication information includes the first selection strategy, and the indication content of the indication information is interference measurement resources, determine all CSI processes corresponding to the interference measurement resources from the set of all notified CSI processes as The CSI process that needs to be processed this time;

When the indication information includes the first selection strategy, and the indication content of the indication information is a carrier set index, determine the carrier set corresponding to the carrier set index from the carrier set notified by the base station, and All CSI processes corresponding to the CSI process set corresponding to each carrier in the determined carrier set are used as the CSI processes that need to be processed this time.

19. The terminal according to claim 17, characterized in that the determining module is specifically used to:

When the indication information includes the second selection strategy, all corresponding CSI processes in the pre-agreed CSI process set are used as the CSI processes that need to be processed this time; or,

All CSI processes corresponding to the CSI process set corresponding to each carrier in the pre-agreed carrier set are regarded as the CSI processes that need to be processed this time.

20. The terminal according to claim 17, characterized in that,

The determination module is also configured to: for each subframe set, determine the CSI process that needs to be processed this time in the CSI process set corresponding to the subframe set according to the indication information;

The processing module is also used to: for each subframe set, according to each CSI that needs to be processed this time in the subframe set The process measurement obtains the corresponding CSI;

The sending module is also configured to: for each subframe set, select at least one CSI from all measured CSIs corresponding to the subframe set as the CSI information of the subframe set;

Wherein, the base station configures CSI process sets for different subframe sets respectively, the subframe set includes at least one subframe, and each of the subframe sets corresponds to at least one CSI process set.

21. The terminal according to any one of claims 16 to 20, characterized in that the sending module is specifically configured to: according to different interference measurement resources corresponding to the CSI process that needs to be processed this time, multiple CSIs obtained from the measurement Select at least one CSI corresponding to at least one interference measurement resource as CSI reporting information according to a preset selection strategy; or,

According to the different NZP CSI-RS corresponding to the CSI process that needs to be processed this time, select at least one CSI corresponding to at least one NZP CSI-RS from the multiple measured CSIs according to the preset selection strategy as the CSI reporting information; or,

According to the transmission mechanism corresponding to the CSI process that needs to be processed this time, select at least one CSI corresponding to at least one transmission mechanism from the measured multiple CSIs according to the preset selection strategy as the CSI upper information; or,

According to the carrier corresponding to the CSI process that needs to be processed this time, select at least one CSI corresponding to at least one carrier from the multiple CSIs measured on all carriers according to the preset selection strategy as the CSI information; or, select from all the CSIs measured on all carriers. Select at least one CSI from the multiple measured CSIs as the CSI reporting information according to the preset selection strategy; or,

According to the process index of the CSI process that needs to be processed this time, the multiple measured CSIs are arranged in ascending order according to the process index of the corresponding CSI process, and the CSI corresponding to at least one CSI process is selected as the CSI reporting information.

22. The terminal according to claim 21, wherein the preset selection strategy includes one or a combination of the following:

The principle of maximum information capacity;

Signal-to-noise ratio SINR maximum principle;

Higher than the set information capacity threshold principle;

Higher than the set SINR threshold principle.

23. A base station for receiving aperiodic channel state information, characterized in that the base station includes: a notification module, configured to notify the terminal of all CSI process sets configured for it, and each of the CSI process sets includes at least one CSI process, each of the CSI processes includes at least measurement information of at least one CSI that needs to be measured corresponding to one transmission point;

An instruction information sending module, configured to send instruction information to the terminal to instruct the terminal to determine what needs to be processed this time from the set of all CSI processes configured by the base station for the terminal and notified to the terminal according to the instruction information. CSI process, measure the corresponding CSI based on each CSI process that needs to be processed this time, and select from all CSI At least one CSI is used as CSI upper information;

A receiving module, configured to receive the CSI reported by the terminal, and perform downlink scheduling and transmission according to the CSI.

24. The base station according to claim 23, characterized in that the notification module is specifically used to:

Send the set of all CSI processes configured for the terminal to the terminal; or,

Send the index corresponding to the CSI process in each CSI process set configured for the terminal to the terminal, so that the terminal determines the corresponding CSI process based on the index corresponding to the CSI process; or,

The bit sequence corresponding to each CSI process set configured for the terminal is sent to the terminal, so that the terminal determines the CSI process included in the corresponding CSI process set according to the bit sequence.

25. The base station according to claim 23, characterized in that the notification module is also used to:

When the terminal activates multiple carriers and the terminal supports coordinated multipoint transmission on some or all of the activated carriers, configure at least one CSI process set for all carriers of the terminal that support coordinated multipoint transmission. .

26. The base station according to claim 23, characterized in that the notification module is also used to:

Configure CSI process sets for different subframe sets respectively, wherein each subframe set includes at least one subframe, and each subframe set corresponds to at least one CSI process set.

27. A transmission system for aperiodic channel state information, characterized in that the system includes:

The base station is configured to notify the terminal of all CSI process sets configured for it; send indication information to the terminal to instruct the terminal to perform aperiodic CSI processes; and receive the CSI on the terminal, and perform the processing according to the CSI Perform downlink scheduling and transmission;

The terminal is configured to determine the CSI process that needs to be processed this time from the set of all CSI processes configured by the base station for the terminal and notified to the terminal according to the received instruction information sent by the base station; Each CSI process measures the corresponding CSI; and selects at least one CSI from all CSIs as CSI upper information, and sends the CSI reporting information to the base station;