WO2012155523A1 - Method, device and system for non-periodic channel state information processing - Google Patents

Abstract

Disclosed in the present invention are a method and device for non-periodic channel state information processing, wherein the method comprises: receiving high-level configuration signaling by a UE, wherein the high-level configuration signaling comprises one or more CSI-RS configuration signaling, and receiving one or more CSI-RS reference signals; carrying out channel measurement of one or more CSI-RS reference signals according to the one or more CSI-RS configuration signaling, and obtaining measurement results; and determining K non-periodic CSI by using the measurement results, and reporting the K non-periodic CSI on K different subframes, wherein K is a positive integer more than or equal to 2. The embodiment of the invention solves the ability deficiency problem that the UE processes and computes channels quality indication (CQI) of multiple cells or multiple transmitting nodes.

Description

 Method, device and system for processing aperiodic channel state information

Technical field

 The present invention relates to the field of communications, and in particular to a method, device and system for processing aperiodic channel state information (CSI) in a distributed antenna system or a cooperative transmission system.

Background technique

 In the wireless communication technology, when the base station side (for example, the evolved Node B, that is, the eNodeB, the eNB) uses multiple antennas to transmit data, the spatial multiplexing mode can be used to increase the data transmission rate. That is, the same time-frequency resource is used to transmit different data at different antenna positions, and the receiving end (for example, user equipment UE) also uses multiple antennas to receive data.

 All the resources of all antennas are allocated to the same user in the case of a single user. The user owns the physical resources allocated to the base station side in one transmission interval. This transmission method is called single user multiple input multiple output ( Single User Multiple). -Input Multiple-Out-put, SU-MIMO) transmission. In the case of multiple users, space resources of different antennas are allocated to different users, and one user and at least one other user share physical resources allocated by the base station side in one transmission interval, and the sharing mode may be space division multiple access mode or space division. In this manner, the transmission mode is called Multiple User Multiple-Input Multiple-Out-put (MU-MIMO) transmission, and the physical resources allocated by the base station side refer to time-frequency resources.

 If the transmission system is to support both SU-MIMO and MU-MIMO, the eNB needs to provide the UE with data in these two modes. When the UE is in the SU-MIMO mode or the MU-MIMO mode, it is necessary to know the rank ( Rank) used by the eNB to transmit MIMO data to the UE.

In SU-MIMO mode, the resources of all antennas are allocated to the same user, and the number of layers used to transmit MIMO data is equal to the rank used by the eNB to transmit MIMO data. In the MU-MIMO mode, the number of layers used for one user transmission is less than the total number of layers used by the eNB to transmit MIMO data. If SU-MIMO mode and MU-MIMO handover are to be performed, the eNB needs to notify the UE in different transmission modes. Different control data. In Long Term Evolution (LTE), the information reflecting the state of the downlink physical channel (CSI) includes three parts: Channel quality indication (CQI), precoding matrix indication (Pre- Coding Matrix Indicator, PMI), Rank Indicator (RI).

 CQI is an indicator to measure the quality of downlink channels. In the 36-213 protocol, CQI is represented by integer values from 0 to 15, representing different CQI levels. Different CQIs correspond to their respective modulation methods and coding rate (MCS), which are divided into 16 cases and can be represented by 4-bit information.

 Table 1 Correspondence between CQI index and MCS

 CQI is an important indicator to measure transmission. It is characterized by MIMO closed-loop precoding according to the protocol specified when the RI value is used as the transmission layer number and the codeword indicated by the reported PMI is used as the precoding. Channel quality at the time of transmission. Therefore, CQI cannot exist independently of RI and PMI.

With the introduction of enhanced LTE (LTE-A) requirements, more and more attention has been paid to node average spectral efficiency and node edge spectral efficiency. In comparison, the spectral efficiency of the node edge is the most concerned, mainly because the uplink and downlink of the LTE-A system are both orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM), or a frequency division system based on a certain variant of OFDM. Different from the traditional wireless communication system with Code Division Multiple Access (CDMA) as the basic multiple access multiplexing method, the LTE-A system has no processing gain, and the node has almost no interference because of the complete frequency division orthogonality. Problem, but the interference handling at the edge of the node is relatively tricky.

 At present, there are three main methods for handling interference at the edge of a node in LTE:

 (1) interference randomization;

 (2) interference cancellation;

 (3) Interference coordination (avoidance).

 The method of interference randomization generally uses frequency hopping, time hopping, direct spreading or code hopping to mitigate the influence of interference between nodes. It has the advantage of no network planning and almost no signaling support, but can only say The interference has been alleviated and has not been fundamentally eliminated.

 Interference Cancellation Although some algorithms can be used to eliminate interference, additional physical entities, such as multi-antenna technology, are generally required to perform better interference cancellation, but sometimes these conditions may not be met.

 The method of interference coordination (avoidance) is to exchange some information between nodes, and use some algorithms to make each node automatically select the appropriate resources according to the feedback information of other nodes and its own situation, so as to achieve efficient resources between nodes. Utilize, and try to reduce the opportunity of resource collision and utilization between nodes, and finally achieve the improvement of node edge performance, which emphasizes to avoid interference caused by the same time-frequency resources between nodes.

 Since the antenna distance of the node edge users is not much different from that of multiple adjacent nodes, the use of multiple nodes' transmit antennas to achieve higher capacity and reliable transmission of the wireless link at the edge of the node has become a research focus.

In the Coordinated Multiple Points Transmission and Reception (CoMP), the prior art CoMP processing flow is: a network side configuration measurement set, and a user equipment performs a Reference Signal Received Power (RSRP) according to the measurement set. , Reference Signal Received Quality (RSRQ) or Received Signal Strength Indicator (RSI) measurement and obtained Measurement results. Based on the measurement result, the multi-point coordinated measurement set is determined by the network side or the user equipment, and the channel state measurement and feedback are performed based on the determined coordinated multi-point measurement set.

 In version 11 (R11), CoMP/MIMO has a typical scenario: for a specific UE, different cooperative nodes in the cooperative measurement set have the same cell ID, and the large-scale fading difference of different cooperative nodes to the UE is relatively large. This phenomenon is attributed to different transmission node (TP) transmission power attributes, some nodes are high power nodes, and some nodes are low power nodes.

 The existing feedback technology includes two types, one is to independently perform channel state information feedback for each node, and the other is to perform global (Global) channel state information feedback for all nodes, where the channel state information includes: Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), and Rank Indicator (RI). Note that the transmission node (TP) may also be referred to as a transmitting node, and the transmission node according to the present invention may be a macro cell, a relay, a pico cell, a femto cell, or a home. Base station ( Home ( e ) NodeB ), etc.

 The typical scenario can also be understood as a distributed multi-antenna system (DAS), which is a non-uniform or non-uniform network (heterogeneous network), including a macro station (Marc And a plurality of remote radio heads (RRHs) (or remote radio units (RRUs)) that share the same cell ID (Cell ID). The UE can receive the signals of Marco and RRH, and expects the Macro and RRH to transmit cooperatively. The above-mentioned collaborative multi-send node transmission scenario, in order to obtain better performance, need to support Global feedback.

 In Release 10 (R10), UE-specific channel state information-reference symbol (CSI-RS) feedback has been supported, which supports the custom CSI-RS port for the UE, which is supported from another perspective. Custom feedback collection. Therefore, in the DAS system, it is currently supported to configure a set of Global CSI-RS to the UE, and the UE can perform Global CSI feedback. It should be noted that the transmit power of Macro and RRH may be different, and the general receive power difference may reach 6 decibels (dB) or more. Therefore, the existing feedback technology can only support scenes with similar power transmissions because it does not support distributed antennas, and it is difficult to work effectively in new scenarios.

For the aperiodic feedback of CSI of multiple carriers of traditional carrier aggregation, the traditional scheme triggers aperiodic 4 advertisements in one transmission time interval (TTI), and reports all carriers in the delayed 4 transmission time intervals (on TTI). Aperiodic CSI information. For COMP systems or distributed antenna systems, For the transmission of the enhanced downlink control signal or to avoid the interference of the neighboring cell, if a feedback method of CSI similar to carrier aggregation is used, it is necessary to calculate multiple cells or transmission in a short time, such as 4 TTIs. The CSI of the node eventually causes the user equipment to have no processing time, and the user equipment UE cannot complete the work.

Summary of the invention

 The technical problem to be solved by the present invention is to overcome the joint transmission of the aperiodic channel state information of the multi-cell or multi-transport node TP by the COMP system or the distributed antenna system, because the interval of the non-periodic CSI from the trigger to the feedback is too short. The problem of not being able to process the information effectively.

 In order to solve the above technical problem, the present invention first provides a method for processing a first type of aperiodic channel state information, including:

 The user equipment (UE) receives high layer configuration signaling, the high layer configuration signaling including one or more channel state information-reference symbol (CSI-RS) configuration signaling, and receiving one or more CSI-RS reference signals;

 Performing channel measurement on the one or more CSI-RS reference signals according to the one or more CSI-RS configuration signals to obtain measurement results;

 Using the measurement result to determine K aperiodic channel state information (CSI), and "^" the aperiodic CSI on K different subframes;

 Where K is a positive integer greater than or equal to 2. In the foregoing method, the step of performing the K aperiodic CSIs on the K different subframes includes: the base station triggering the feedback of the aperiodic CSI in the nth transmission time interval (TTI), where the UE is Reporting the kth aperiodic CSI on the n+k*d TTIs;

Where k = l, 2, ..., K, n is an integer greater than or equal to 0, and d is a positive integer greater than or equal to 1. The high-level configuration signaling includes one CSI-RS configuration signaling, and the UE has a CSI-RS configuration, where all N CSI-RS ports in the CSI-RS configuration have m CSI-RS ports. Set; where N is a positive integer greater than 1, m is a positive integer greater than 1, and m is less than or equal to N; no subset of the two CSI-RS ports are identical in the m port subsets. Each of the K aperiodic CSIs corresponds to a subset of CSI-RS ports. In the m CSI-RS port subsets, any two CSI-RS port subsets do not include the same port, and the sum of the number of ports included in all CSI-RS port subsets is equal to N, where two ports The difference between the two ports is that the two ports occupy different port numbers, or that the two ports occupy the same port number but occupy different physical resources, including time resources, frequency resources, or code resources.

 A subset of the CSI-RS ports corresponding to one of the distributed antenna systems or the coordinated multipoint transmission system, or to a plurality of transmission nodes in the distributed antenna system or the coordinated multipoint transmission system.

 The high layer configuration signaling includes a plurality of CSI-RS configuration signaling, and the UE has m CSI-RS configurations; wherein m is a positive integer greater than one.

 Each of the K aperiodic CSIs corresponds to a CSI-RS configuration.

 One of the CSI-RS configurations corresponds to a transmission node in a distributed antenna system or a coordinated multipoint transmission system, or to a plurality of transmission nodes in a distributed antenna system or a coordinated multipoint transmission system.

 Each aperiodic CSI includes a Precoding Matrix Indicator (PMI), a Rank Indicator (RI), and a Channel Quality Indicator (CQI), or only a CQI. To solve the above problem, the present invention also provides a second method for processing non-period channel state information, including:

 The base station configures one or more channel state information in the high layer configuration signaling - reference symbol

(CSI-RS) configuration signaling;

 Generating one or more CSI-RS reference signals according to the one or more CSI-RS configuration signaling;

 Transmitting, by the high layer configuration signaling carrying the one or more CSI-RS configuration signaling, and the one or more CSI-RS reference signals;

 Receiving K aperiodic channel state information (CSI);

Where K is a positive integer greater than or equal to 2; The K aperiodic CSIs are channel-measured by the user equipment (UE) for the one or more CSI-RS reference signals and determined using the measured results of the channel measurements. In the method, K aperiodic CSIs are channel measurements of the one or more CSI-RS reference signals by the UE using the first aperiodic channel state information processing method, and are measured using the channel. The measurement results are determined. The present invention also provides a method for processing a third aperiodic channel state information, including: a step in a method for a base station to perform the second aperiodic channel state information processing; and a user equipment (UE) performing the first non- The steps in the processing method of the periodic channel state information. To solve the above technical problem, the present invention further provides a first CSI processing apparatus, including: a first receiving module configured to receive high layer configuration signaling and one or more channel state information-reference symbol (CSI-RS) reference signals The high-level configuration signaling includes one or more CSI-RS configuration signalings;

 a measurement module, configured to perform channel measurement on the one or more CSI-RS reference signals according to the one or more CSI-RS configuration signals, to obtain a measurement result;

 Determining a module configured to determine K aperiodic channel state information (CSI) using the measurement result;

 The reporting module is configured to report the K aperiodic CSIs on K different subframes; wherein K is a positive integer greater than or equal to 2. In the above device:

 The upper ^艮 module is arranged to pass the K-periodic CSI by: 3⁄4:

 If the feedback of the non-periodic CSI is triggered at the nth transmission time interval (TTI), the kth aperiodic CSI is reported on the n+k*d TTIs;

Where k = l, 2, ..., K, n is an integer greater than or equal to 0, and d is a positive integer greater than or equal to 1. To solve the above technical problem, the present invention further provides a second CSI processing apparatus, including: a configuration module, configured to configure one or more channel state information-reference symbols (CSI-RS) configuration signaling in the high layer configuration signaling;

 Generating a module configured to generate one or more CSI-RS reference signals;

 a sending module, configured to send high layer configuration signaling carrying the one or more CSI-RS configuration signalings, and the one or more CSI-RS reference signals;

 a second receiving module, configured to receive K aperiodic channel state information (CSI); wherein K is a positive integer greater than or equal to 2;

 The K aperiodic CSIs are determined based on channel measurements of the one or more CSI-RS reference signals and measurements obtained using the channel measurements. In the apparatus, the second receiving module is configured to receive the K aperiodic CSIs determined according to the processing method of the first aperiodic channel state information. In order to solve the above problems, the present invention further provides a CSI processing system, comprising the first CSI processing apparatus and the second CSI processing apparatus, wherein:

 The first receiving module is communicatively connected to the sending module;

 The second receiving module is communicatively connected to the reporting module.

Compared with the prior art, the embodiment of the present invention overcomes the problem that the information from the triggering aperiodic CSI feedback to the actual aperiodic CSI feedback is too short to effectively process information in the COMP technology or the distributed antenna system. The manner in which the CSI of different cells or different transmission nodes are transmitted on different TTIs overcomes the defect that the UE has insufficient ability to process and calculate the CQI of multiple cells or multiple transmission nodes.

Other features and advantages of the invention will be set forth in the description which follows, and The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims. BRIEF abstract The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification, which together with the embodiments of the present invention are used to explain the technical solutions of the present invention, and do not constitute a limitation of the technical solutions of the present invention. In the drawing:

 FIG. 1 is a schematic flow chart of a CSI processing method according to an embodiment of the present invention.

 2 is a schematic flow chart of another CSI processing method according to an embodiment of the present invention.

 FIG. 3 is a schematic flowchart diagram of still another CSI processing method according to an embodiment of the present invention.

 4 is a schematic structural diagram of a CSI processing apparatus according to an embodiment of the present invention.

 FIG. 5 is a schematic structural diagram of another CSI processing apparatus according to an embodiment of the present invention. Preferred embodiment of the invention

 The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, by which the present invention can be applied to the technical solutions to the technical problems, and the implementation of the technical effects can be fully understood and implemented. The mutual combination under the premise is within the protection scope of the present invention. Additionally, the steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer-executable instructions, and, although the logical order is illustrated in the flowchart, in some cases, may be different The steps shown or described are performed in the order herein.

 An embodiment of the present invention provides a CSI processing method, which is applied to a user equipment (UE) side, as shown in FIG. 1, which mainly includes the following steps:

 Step S110: A user equipment (UE) receives high-level configuration signaling sent by the base station, and receives one or more CSI-RS reference signals sent by the base station; where the high-level configuration signaling includes one or more (two Or more than two) Channel State Information-Reference Symbol (CSI-RS) configuration signaling; the one or more CSI-RS reference signals are correspondingly configured by the base station according to the one or more CSI-RS configuration signaling-corresponding Generating, that is, having a corresponding relationship between the CSI-RS reference signal and the CSI-RS configuration signaling, generating a corresponding CSI-RS reference signal according to a CSI-RS configuration signaling;

Step S120: The UE performs the one or more according to the one or more CSI-RS configuration signalings. The CSI-RS reference signal is used for channel measurement to obtain measurement results;

 Step S130, the UE uses the measurement result to determine K aperiodic channel state information (CSI), and reports the K aperiodic CSIs to the base station in K different subframes;

 Where K is a positive integer greater than or equal to 2.

 In this embodiment, when the base station triggers the feedback of the aperiodic CSI of the UE in the nth TTI, the UE reports the first aperiodic channel state information (CSI) on the n+d ,, at the nth The 2nd aperiodic CSI is reported on the +2d TTIs; and so on, the Kth aperiodic channel state information (CSI) is reported on the n+K*d TTIs. That is, the present embodiment reports the kth aperiodic CSI on the n+k*d TTIs; wherein k=l, 2, . . . , K, n is an integer greater than or equal to 0, and d is greater than A positive integer equal to 1.

 In the embodiment of the present invention, when the high-level configuration signaling includes one channel state information-reference symbol (CSI-RS) configuration signaling, for the UE, all N CSIs in one CSI-RS configuration - The set of RS ports has m subsets, defined as a subset of CSI-RS ports; where N is a positive integer greater than 1, m is a positive integer greater than 1, m is less than or equal to N, and there are no two CSI-RSs The port subset is identical.

 In the embodiment of the present invention, when the high-level configuration signaling includes one CSI-RS configuration signaling, for the K aperiodic channel state information (CSI), each aperiodic CSI corresponds to one CSI-RS port. The subset, the number K of aperiodic CSI is less than or equal to the number of CSI-RS port subsets. The channel state information includes PMI, RI, and CQI, or only CQI.

 In the embodiment of the present invention, any two of the CSI-RS port subsets do not include the same port, and the sum of the number of ports included in all the CSI-RS port subsets is equal to N, where two ports are not The same means that the two ports occupy different port numbers, or that the two ports occupy the same port number but occupy different physical resources, including time resources, frequency resources, or code resources.

 In the embodiment of the present invention, one subset of the CSI-RS ports corresponds to one of the distributed antenna system or the coordinated multipoint transmission system, or corresponds to multiple in the distributed antenna system or the coordinated multipoint transmission system. Transfer node.

In the embodiment of the present invention, when the high layer configuration signaling includes multiple channel state information-reference symbol (CSI-RS) configuration signaling, there are m CSI-RS configurations for the UE. In the embodiment of the present invention, when the high layer configuration signaling includes multiple CSI-RS configuration signaling, for the K aperiodic channel state information (CSI), each aperiodic CSI corresponds to one CSI-RS configuration. The number K of aperiodic CSIs is less than or equal to the number of CSI-RS configurations. The channel state information includes PMI, RI, and CQI, or only CQI.

 In the embodiment of the present invention, one CSI-RS configuration corresponds to one transmission node in a distributed antenna system or a coordinated multipoint transmission system, or corresponds to multiple transmission nodes in a distributed antenna system or a coordinated multipoint transmission system. .

 An embodiment of the present invention provides a method for processing channel state information, which is applied to a base station side. As shown in FIG. 2, the embodiment mainly includes:

 Step S210: The base station configures one or more channel state information-reference symbol (CSI-RS) configuration signaling in the high layer configuration signaling.

 Step S220: The base station generates, according to the one or more CSI-RS configuration signalings, one or more corresponding CSI-RS reference signals, and one CSI-RS configuration signaling correspondingly generates a corresponding CSI-RS reference signal.

 Step S230, the base station sends, to the user equipment (UE), high layer configuration signaling carrying one or more CSI-RS configuration signalings, and the one or more CSI-RS reference signals;

 Step S240: The base station receives K aperiodic channel state information (CSI) reported by the UE, where K is a positive integer greater than or equal to 2;

 The K aperiodic CSIs are determined by the UE performing channel measurement on the one or more CSI-RS reference signals according to the one or more CSI-RS configuration signals, and using the measured results of the channel measurement. For details, refer to the specific content of the embodiment shown in Figure 1 above, and details are not described here.

 The embodiment of the present invention provides a method for processing channel state information, which is understood in conjunction with the embodiment shown in FIG. 1 and the embodiment shown in FIG. 2. As shown in FIG. 3, this embodiment mainly includes:

 Step S310, the base station configures one or more channel state information-reference symbol (CSI-RS) configuration signaling in the high layer configuration signaling;

Step S320, the base station generates, according to the one or more CSI-RS configuration signaling, one or more corresponding CSI-RS reference signals; Step S330, the base station sends, to the user equipment (UE), the high layer configuration signaling that carries the one or more CSI-RS configuration signaling, and sends the generated one or more CSI-RS reference signals.

 Step S340, the user equipment (UE) receives the high layer configuration signaling that is sent by the base station and carries the one or more CSI-RS configuration signaling, and the one or more CSI-RS reference signals. Step S350, the UE according to the One or more CSI-RS configuration signalings perform channel measurement on the one or more CSI-RS reference signals to obtain measurement results;

 Step S360, the UE determines K aperiodic channel state information (CSI) by using the measurement result;

 Step S370: The UE reports the K aperiodic CSIs to the base station in the K different subframes. In step S380, the base station receives the K aperiodic CSIs reported by the UE in the K different subframes.

 Embodiments of the present invention provide a CSI processing apparatus applied to a UE side, which can be used in the foregoing embodiments as shown in Figs. 1 and 3. In combination with the foregoing embodiments, the apparatus shown in FIG. 4 mainly includes:

 The first receiving module 410 is configured to receive, by the base station, high layer configuration signaling and one or more channel state information-reference symbol (CSI-RS) reference signals, where the high layer configuration signaling includes one or more channel state information. - reference symbol (CSI-RS) configuration signaling;

 a measurement module 420, which is connected to the first receiving module 410, and configured to perform channel measurement on the one or more CSI-RS reference signals according to the one or more CSI-RS configuration signals to obtain a measurement result;

 A determination module 430 is coupled to the measurement module 420 and configured to determine K aperiodic channel state information (CSI) using the measurement results obtained by the measurement module 420; wherein K is a positive integer greater than or equal to 2;

 The reporting module 440 is coupled to the determining module 430 and configured to report the K aperiodic CSIs determined by the determining module 430 on the K different subframes.

Embodiments of the present invention provide a CSI processing apparatus applied to a base station, which can be used in the foregoing embodiments as shown in FIGS. 2 and 3. In combination with the foregoing embodiment, as shown in FIG. 5, the device is mainly packaged. Includes:

 The configuration module 510 is configured to configure one or more channel state information-reference symbols (csi-RS) configuration signaling in the high layer configuration signaling; the generating module 520 is connected to the configuration module 510, and is configured to be according to the one Or generating multiple CSI-RS configuration signalings - corresponding one or more CSI-RS reference signals;

 The sending module 530 is connected to the configuration module 510 and the generating module 520, and is configured to send high-level configuration signaling that carries one or more CSI-RS configuration signaling configured by the configuration module 510, and is generated by the sending and generating module 520. One or more CSI-RS reference signals;

 a second receiving module 540, configured to receive K aperiodic CSIs, where K is a positive integer greater than or equal to 2; the K aperiodic CSIs are addressed by the UE according to the one or more CSI-RS configuration signaling Or a plurality of CSI-RS reference signals are used for channel measurement and determined using the measurement results obtained by the channel measurement.

 The embodiment of the present invention provides a CSI processing system, which includes the apparatus applicable to the UE side as shown in the embodiment shown in FIG. 4 and the apparatus applicable to the base station side of the embodiment shown in FIG. Referring to the embodiment shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 4, as shown in FIG. 5, the system of this embodiment mainly includes:

 The first processing device 400 includes a first receiving module 410, a measuring module 420, a determining module 430, and a reporting module 440, as shown in FIG. 4, and each module in the device can be understood by referring to the content of the embodiment shown in FIG. Here is not #丈说;

 The second processing device 500 includes a configuration module 510, a generation module 520, a sending module 530, and a second receiving module 540 as shown in FIG. 5. The modules in the device can be understood with reference to the contents of the embodiment shown in FIG. Here is not #丈说;

 The first receiving module 410 is communicatively connected to the sending module 530, and is configured to receive the high-level configuration signaling sent by the sending module 530. The second receiving module 540 is communicatively connected to the reporting module 440, and is configured to receive the reporting module. 440 reported CSI.

Experimental application

The base station where the UE is located configures the UE to have a precoding matrix indicating PMI/RI and the number of ports of the CSI-RS. The target is greater than 1.

The user equipment (UE) receives high-level configuration signaling including CSI-RS configuration signaling from the base station, where the CSI-RS configuration signaling includes m port subsets. The CSI-RS port subset is m sets into which all N CSI-RS ports configured for the UE are divided. Wherein, N _Q CSI-RS ports constitute a first CSI-RS port subset CSIRSSubSeto, Ni CSI-RS ports constitute a second CSI-RS port subset CSIRSSubSe^, and so on, N _m-1 ports constitute The mth CSI-RS port subset CSIRSSubSe where N is a positive integer greater than 1, m is a positive integer greater than 1, and m is less than or equal to N. The two ports do not contain the same port. If two ports occupy different port numbers, the two ports must be different. At the same time, if two ports have the same port number but occupy different physical resources, the two ports are still different. The physical resource may be a time resource, a frequency resource, or a code resource.

For the first CSI-RS port subset CSIRSSubSeto, the channel measurement may determine the first aperiodic channel state information CSI _Q ; and the second CSI-RS port subset CSIRSSubSet channel measurement may determine the second aperiodic channel state information CSI; and so on; for the mth CSI-RS port subset CSIRSSubSeto, the channel measurement may determine the mth aperiodic channel state information CSI; wherein any CSI includes PMI, RI and CQI.

 Here m can be equal to 2.

 Correspondingly, the CSI-RS port subset means that all CSI-RS ports configured for the UE are from 15 to 22, and the eight ports are divided into two sets. The first four CSI-RS ports form the first CSI-RS port subset CSIRSSubSeto from 15 to 18 ports, and the other four CSI-RS ports form the second CSI-RS port from 19 to 22 ports. Subset CSIRSSubSeto

For the first CSI-RS port subset CSIRSSubSeto, the channel measurement may determine the first aperiodic channel state information CSI _Q ; the second CSI-RS port subset CSIRSSubSet channel measurement may determine the second aperiodic channel Status information csii.

 More specifically, CSIQ or CS^ is a physical uplink shared channel (PUSCH) feedback mode.

Mode 1-2 defined CSI, or PUSCH feedback mode Mode 2-2 defined CSI, or PUSCH feedback mode Mode 3-1 defined CSI, these feedback modes are defined in the R10 protocol.

Here, for the UE, a subset of CSI-RS ports corresponds to a distributed antenna system or A transport node TP in a coordinated multipoint transmission system, or a subset of CSI-RS ports corresponds to a plurality of transport nodes TP in a distributed antenna system or a coordinated multipoint transmission system.

 The user equipment UE reports the CSI value to the eNodeB.

The base station is configured to trigger the aperiodic feedback of the user equipment UE at the nth TTI, and the user equipment UE feeds back the first aperiodic channel state information CSI on n+4 ΤΉ. , feeding back the second aperiodic channel state information CSI _{l D} on n+2*4 TTIs

 Experimental application two

 The base station where the UE is located configures the UE to have a precoding matrix indicating PMI/RI and the number of ports of the CSI-RS is greater than one.

 The user equipment UE receives a high layer configuration signal from the base station containing m CSI-RS configuration signals.

For the first CSI-RS configuration signaling, the channel measurement may determine the first aperiodic channel state information CSI _Q ; for the second CSI-RS configuration signaling, the channel measurement may determine the second aperiodic channel state The information CSI^ and so on; for the mth CSI-RS configuration, the channel measurement can determine the mth aperiodic channel state information CSIm, where any CSI contains PMI, RI and CQI.

 Here m can be equal to 2.

Correspondingly, for the first CSI-RS configuration, the channel measurement can determine the first aperiodic channel state information CSI _Q with 8 CSI-RS antenna ports; for the second CSI-RS configuration, the channel measurement can be determined The second aperiodic channel state information CSI _l has 4 CSI-RS antenna ports.

 More specifically, CSI. Or CS^ is the CSI defined by the PUSCH feedback mode Mode 1-2, or the CSI defined by the PUSCH feedback mode Mode 2-2, or the CSI defined by the PUSCH feedback mode Mode 3-1. These feedback modes are defined in the R10 protocol. Also, the PMI of CSIQ uses an 8-antenna codebook, and the PMI uses a 4-antenna codebook.

 Here, for the UE, one CSI-RS configuration corresponds to one of the distributed antenna system or the coordinated multipoint transmission system, or one CSI-RS configuration corresponds to the distributed antenna system or the coordinated multipoint transmission system. Multiple transfer nodes TP in .

The user equipment UE reports the determined CSI value to the eNodeB. The base station is configured to trigger the aperiodic feedback of the user equipment UE at the nth TTI, and the user equipment UE feeds back the first aperiodic channel state information CSI on the η+4 ΤΉ. The second aperiodic channel state information csii is fed back on η+2*4 ΤΤΙ.

 In summary, according to the above embodiments and experimental applications of the present invention, different CSIs are determined for the UE based on different CSI-RS port subsets or different CSI-RS configurations. Furthermore, by reporting CSI on multiple TTIs, the user equipment can effectively overcome the excessive computational complexity of computing CQI/PMI/RI, and on the other hand improve the performance of the distributed antenna system.

 It will be apparent to those skilled in the art that the components of the apparatus and system provided by the embodiments of the present invention described above, as well as the steps of the method, can be implemented by a general-purpose computing device, which can be concentrated on a single computing device. Or distributed over a network of computing devices, optionally, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device for execution by the computing device, or Each of the integrated circuit modules is fabricated separately, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.

 While the embodiments of the present invention have been described above, the described embodiments are merely for the purpose of understanding the invention and are not intended to limit the invention. Any modification and variation of the form and details of the invention may be made by those skilled in the art without departing from the spirit and scope of the invention. It is still subject to the scope defined by the appended claims.

Industrial applicability

 Compared with the prior art, the present invention overcomes the problem that the information from the triggering aperiodic CSI feedback to the actual aperiodic CSI feedback is too short to effectively process information in the COMP technology or the distributed antenna system, and is used for different cells or The manner in which the CSIs of different transmission nodes are transmitted on different TTIs overcomes the defect that the UE has insufficient ability to process and calculate the CQI of multiple cells or multiple transmission nodes.

Claims

Claim 1. A method for processing aperiodic channel state information, comprising:  The user equipment (UE) receives high layer configuration signaling, the high layer configuration signaling including one or more channel state information-reference symbol (CSI-RS) configuration signaling, and receiving one or more CSI-RS reference signals;  Performing channel measurement on the one or more CSI-RS reference signals according to the one or more CSI-RS configuration signals to obtain measurement results;  Using the measurement result to determine K aperiodic channel state information (CSI), and "^" the aperiodic CSI on K different subframes;  Where K is a positive integer greater than or equal to 2. 2. The method according to claim 1, wherein the step of reporting the K aperiodic CSIs on the K different subframes comprises:  The base station triggers the feedback of the aperiodic CSI at the nth transmission time interval (TTI), and the UE reports the kth aperiodic CSI on the n+k*d TTIs;  Where k = l, 2, ..., K, n is an integer greater than or equal to 0, and d is a positive integer greater than or equal to 1. 3. The method of claim 1 wherein:  The high-level configuration signaling includes one CSI-RS configuration signaling, and the UE has a CSI-RS configuration, where all N CSI-RS ports in the CSI-RS configuration have m CSI-RS ports. Set  Where N is a positive integer greater than 1, m is a positive integer greater than 1, and m is less than or equal to N; no subset of the two CSI-RS ports are identical in the m port subset. 4. The method of claim 3, wherein:  Each of the K aperiodic CSIs corresponds to a subset of CSI-RS ports. 5. The method of claim 3, wherein: The m CSI-RS port subsets, any two CSI-RS port subsets do not contain the same Port, and the sum of the number of ports included in all CSI-RS port subsets is equal to N, where two ports are different, meaning that two ports occupy different port numbers, or two ports occupy the same Port number, but occupies different physical resources, including time resources, frequency resources, or code resources. 6. The method of claim 3, wherein:  A subset of the CSI-RS ports corresponding to one of the distributed antenna systems or the coordinated multipoint transmission system, or to a plurality of transmission nodes in the distributed antenna system or the coordinated multipoint transmission system. 7. The method of claim 1 wherein:  The high layer configuration signaling includes a plurality of CSI-RS configuration signaling, and the UE has m CSI-RS configurations; wherein m is a positive integer greater than 1. 8. The method of claim 7 wherein:  Each of the K aperiodic CSIs corresponds to a CSI-RS configuration. 9. The method of claim 7 wherein:  One of the CSI-RS configurations corresponds to a transmission node in a distributed antenna system or a coordinated multipoint transmission system, or to a plurality of transmission nodes in a distributed antenna system or a coordinated multipoint transmission system.  10. The method of claim 3 or 7, wherein:  Each aperiodic CSI includes a Precoding Matrix Indicator (PMI), a Rank Indicator (RI), and a Channel Quality Indicator (CQI), or only a CQI. 11. A method for processing aperiodic channel state information, comprising:  The base station configures one or more channel state information in the high layer configuration signaling - reference symbol (CSI-RS) configuration signaling; Generating one or more CSI-RS reference signals according to the one or more CSI-RS configuration signaling; Transmitting, by the high layer configuration signaling carrying the one or more CSI-RS configuration signaling, and the one or more CSI-RS reference signals;  Receiving K aperiodic channel state information (CSI);  Where K is a positive integer greater than or equal to 2;  The K aperiodic CSIs are channel-measured by the user equipment (UE) for the one or more CSI-RS reference signals and determined using the measured results of the channel measurements. The method according to claim 11, wherein the K aperiodic CSIs are one or more CSI-RSs by the UE using the method according to any one of claims 1 to 10. The reference signal is measured by the channel and determined using the measurement results obtained by the channel measurement. 13. A CSI processing apparatus, comprising:  a first receiving module, configured to receive high layer configuration signaling and one or more channel state information-reference symbol (CSI-RS) reference signals, where the high layer configuration signaling includes one or more CSI-RS configuration signaling;  a measurement module, configured to perform channel measurement on the one or more CSI-RS reference signals according to the one or more CSI-RS configuration signals, to obtain a measurement result;  Determining a module configured to determine K aperiodic channel state information (CSI) using the measurement result;  The reporting module is configured to report the K aperiodic CSIs on K different subframes; wherein K is a positive integer greater than or equal to 2. 14. Apparatus according to claim 13 wherein:  The upper ^艮 module is arranged to pass the K-periodic CSI by: 3⁄4:  When the feedback of the aperiodic CSI is triggered at the nth transmission time interval (TTI), the kth aperiodic CSI is reported on the n+k*d TTIs;  Where k = l, 2, ..., K, n is an integer greater than or equal to 0, and d is a positive integer greater than or equal to 1. 15. A CSI processing apparatus, comprising: a configuration module, configured to configure one or more channel state information-reference symbols (CSI-RS) configuration signaling in the high layer configuration signaling;  Generating a module configured to generate one or more CSI-RS reference signals;  a sending module, configured to send high layer configuration signaling carrying the one or more CSI-RS configuration signalings, and the one or more CSI-RS reference signals;  a second receiving module, configured to receive K aperiodic channel state information (CSI); wherein K is a positive integer greater than or equal to 2;  The K aperiodic CSIs are determined based on channel measurements of the one or more CSI-RS reference signals and measurements obtained using the channel measurements.