WO2018028549A1

WO2018028549A1 - Measurement pilot transmission method, channel state information feedback method and device

Info

Publication number: WO2018028549A1
Application number: PCT/CN2017/096250
Authority: WO
Inventors: 肖华华; 李儒岳; 张楠; 贺海港
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-08-12
Filing date: 2017-08-07
Publication date: 2018-02-15
Also published as: CN107733618A

Abstract

Provided in embodiments of the present invention are a measurement pilot transmission method, a channel state information feedback method and device. The measurement pilot transmission method comprises: determining M sets of measurement pilot resources, wherein the M sets of measurement pilot resources comprises M1 sets of signal measurement pilot resources and M2 sets of interference measurement pilot resources, and the M, M1 and M2 are positive integers; and sending the determined M sets of measurement pilot resources. With the embodiments of the present invention, the problem in the related art that channel information and interference channel information of a signal cannot be flexibly measured by means of distinguishing due to the fact that the measurement pilot resources are not distinguished, is solved.

Description

Method for transmitting measurement pilot, feedback method and device for channel state information

Technical field

The present invention relates to the field of communications, and in particular to a method for transmitting a measurement pilot, a method and a device for feeding back channel state information.

Background technique

Multiple-input-multiple-output (MIMO) is one of the most important technologies in the field of wireless communications. It includes spatial diversity and spatial multiplexing techniques, the former can improve the reliability of wireless communication links, while the latter can improve the spectrum efficiency of wireless communication systems. However, in order to obtain relatively high performance, the transmitting end needs to know the channel state information of the wireless communication transmission when transmitting data. However, in order to be able to adapt to the change of the channel, in the Long Term Evolution (LTE) system, the user equipment (User Equipment, UE for short) can pass the downlink physical channel status information. Channel State Information (CSI) reports the downlink channel quality information to the base station. The feedback content reflecting the downlink physical channel CSI in LTE includes the following three items:

(1) Channel quality indication (CQI);

(2) Pre-coding Matrix Indicator (PMI);

(3) Rank Indicator (Rank Indicator, referred to as RI);

The RI is responsible for indicating the rank of the channel matrix, that is, the number of data layers that can be transmitted in parallel; the PMI is responsible for providing the UE with a recommendation for transmitting precoding; and the CQI is the signal to interference and noise ratio of the UE for the RI and PMI transmitted according to the feedback ( Signal to Interference plus Noise Ratio (SINR) level estimation, which is responsible for the auxiliary base station to determine the Modulation Coding Scheme (MCS). The content of the CSI feedback is usually measured and calculated on a reference signal (Reference Signal, referred to as RS). The RS may include but is not limited to at least one of the following:

(1) Cell Specific Reference Signal (CRS);

(2) Channel State Information Reference Signal (CSI-RS);

(3) Interference Measurement Resource (IMR).

LTE adopts Orthogonal Frequency Division Multiplexing (OFDM) technology in the cell, and the user signals in the cell are orthogonal, and the interference can be well controlled. The frequency reuse factor of the neighboring cell is 1, that is, the same frequency is usually used between adjacent cells. Therefore, inter-cell interference is very serious, and even serious inter-cell interference leads to poor cell edge performance, which is a important question.

In order to improve the performance of the cell edge users, the Long Term Evolution-Advanced (LTE-A) system introduces Coordinated Multi-Point (CoMP) transmission technology. The CoMP technology passes multiple phases. Neighboring base stations or nodes cooperate to reduce the interference of users at the cell edge, thereby improving the quality of service. CoMP technology is mainly divided into the following three types:

(1) Joint Transmission (JT);

In JT, when multiple coordinated cells jointly provide signal transmission to the target user on the same time-frequency resource, the interference signal becomes a useful signal to the terminal, so that the reception quality of the signal can be greatly improved. Further, JT can be further divided into coherent JT (Coherent JT) and non-coherent JT (Non-coherent JT). The coherent JT requires the UE to feed back the phase difference between different Transmission Nodes (TPs) to ensure that the signals of different TPs can be added in phase at the UE; the transmitted baseband data needs to be contributed at different TPs to achieve joint coding. Due to its high requirements for feedback and backhaul, and limited performance gains, the current protocol is currently not supported. In non-coherent JT, different TPs can transmit independent data to the UE without joint coding, which is more practical because of lower requirements for backhaul.

(2) Dynamic point selection/Dynamic point blanking (DPS/DPB);

(3) Coordinated Scheduling Coordinated Beamforming (CSCB);

The DPS can be serviced by dynamically selecting the cell with the best channel condition to optimize the quality of service of the user, and the CSCB and the DPB can suppress the interference to the target user through the scheduling or transmission control of the coordinated cell.

In the fifth generation of mobile communication technology (5G), it is a common trend to densely deploy transmission nodes to meet the increasing traffic demands. The distance between TP is only tens of meters or even ten meters. The dense transmission section can provide high splitting gain to meet the capacity requirements of hotspots such as downtown and office areas, but it also brings more serious interference problems. Therefore, CoMP technology is more necessary. At the same time, densely deployed transport nodes have also introduced new scenarios for CoMP technology. In a dense network, the number of TPs is large, and the cost of a single TP must be reduced. Therefore, the structure is simple, and the number of antennas will become a change trend of TP. At the same time, the distance between the TP and the UE is small, and the signal propagation path is likely to be a direct path. In an environment where the multipath is not rich, it is often difficult to simultaneously transmit multiple data streams to the UE. With the development of the UE, multiple antennas are becoming a trend, and the antenna freedom of the UE is not fully utilized. At this time, a plurality of data streams can be transmitted by the two TPs for the UE through the JT, thereby implementing multi-layer transmission. At the same time, DPS/DPB and CS/CB in dense networks also require more flexible interference measurements to support these technologies.

In general, the user's primary interference comes from several neighboring cells. The existing LTE technology can only measure interference through CSI-interference measurement (CSI-IM), and the channel that the CSI-IM may measure may correspond to the channel on the data of the neighboring cell. On the port corresponding to each CSI-IM, the superimposed signals of all the transmitting antennas of all interfering base stations are measured, so the statistical information of the interference is generally measured. It is not possible to obtain more accurate channel information of the main interfering base station, so that channel state information cannot be accurately obtained, such as obtaining an accurate CQI value and selecting a more accurate precoding matrix according to the CQI value.

For the problem that the measurement pilot resources are not distinguished in the related art, and the channel information of the signal and the interference channel information cannot be flexibly measured, an effective solution is not proposed in the related art.

Summary of the invention

The embodiment of the invention provides a method for transmitting a measurement pilot and feedback of channel state information. The method and the device solve the problem that at least the measurement pilot resources are not distinguished in the related art, so that the channel information of the signal and the interference channel information cannot be flexibly measured.

According to an embodiment of the present invention, a method for transmitting a measurement pilot is provided, including: determining a set of measurement pilot resources, wherein the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and M2. The set of interference measurement pilot resources, wherein the M, M1, and M2 are positive integers; and the determined M sets of measurement pilot resources are transmitted.

Optionally, the signal measurement pilot resource is used to measure channel information and/or channel state information of the target signal, and the interference measurement pilot resource is used to measure channel information and/or channel state information of the interference signal.

Alternatively, M1+M2=M.

Optionally, the method further includes: receiving channel state information determined by the terminal according to the M sets of measurement pilot resources, where the channel state information includes at least one of: channel rank, precoding matrix index, channel Quality indication.

Optionally, determining the M sets of measurement pilot resources includes: selecting the M sets of measurement pilot resources from available measurement pilot resources, where the number of available measurement pilot resources is greater than or equal to M.

Optionally, sending the determined set of measurement pilot resources includes: transmitting the determined M sets of measurement pilot resources in a non-periodic manner by using one subframe; or determining the set of M The measurement pilot resources are transmitted through M subframes in a periodic transmission manner.

Optionally, when the determined M sets of measurement pilot resources are sent in M subframes in a periodic manner, the measurement pilot parameters of the M sets of measurement pilot resources are configured the same, where the measurement The pilot parameters include at least one of the following: the number of ports, the subframe offset, and the period.

Optionally, the method further includes: transmitting quasi-co-location parameter information for indicating quasi-common position information of the M sets of measurement pilot resources.

Optionally, the M1 set of signal measurement pilot resources has the same quasi-common position parameter information; and/or, the M2 set of interference measurement pilot resources and the M1 set of signal measurement pilot resources are Different quasi-common position parameter information.

Optionally, the method further includes: transmitting pilot type signaling for indicating a type of the M sets of measurement pilot resources, where the pilot type signaling is used to indicate one of: indicating the Any one of the M sets of measurement pilot resources is a signal measurement pilot resource or an interference measurement pilot resource; indicating a signal measurement pilot resource in the M sets of measurement pilot resources; indicating the M set The interference measurement pilot resource in the pilot resource is measured; the M1 set in the M sets of measurement pilot resources is indicated as a signal measurement pilot resource and/or the M2 set is an interference measurement pilot resource.

According to an embodiment of the present invention, a method for feeding back channel state information is provided, including: receiving M sets of measurement pilot resources, where the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and The M2 sets of interference measurement pilot resources, wherein the M, M1, and M2 are positive integers; the M sets of measurement pilot resources are used for channel measurement to obtain channel state information; and the channel state information is fed back.

Alternatively, M1+M2=M.

Optionally, receiving the M sets of measurement pilot resources includes: receiving, in a subframe, the M sets of measurement pilot resources that are sent in a non-periodic transmission manner; or receiving the M subframes by using a periodic transmission manner. The M sets of measurement pilot resources.

Optionally, when receiving the M sets of measurement pilot resources that are sent in a periodic transmission manner on the M subframes, the measurement pilot parameter configurations of the M sets of measurement pilot resources are the same, where the measurement The pilot parameters include at least one of the following: the number of ports, the subframe offset, and the phase period.

Optionally, the method further includes: receiving quasi-common position parameter information; and determining quasi-common position information of the M sets of measurement pilot resources according to the quasi-co-location parameter information.

Optionally, the quasi-co-location information of the M sets of measurement pilot resources includes at least one of the following: The M1 set of signal measurement pilot resources has the same quasi-common position parameter information; the M2 set of interference measurement pilot resources and the M1 set of signal measurement pilot resources have different quasi-co-location parameter information.

Optionally, the method further includes: receiving pilot type signaling for indicating a type of the M sets of measurement pilot resources, where the pilot type signaling is used to indicate one of: indicating the Any one of the M sets of measurement pilot resources is a signal measurement pilot resource or an interference measurement pilot resource; indicating a signal measurement pilot resource in the M sets of measurement pilot resources; indicating the M set Measure the interference measurement pilot resource in the pilot resource; indicate that the M1 set in the M sets of measurement pilot resources is a signal measurement pilot resource and/or the M2 set is an interference measurement pilot resource; according to the pilot type letter Determining, by the M1 set of signal measurement pilot resources and/or the M2 sets of interference measurement pilot resources in the M sets of measurement pilot resources.

Optionally, the method further includes: determining, according to a manner agreed with the base station, the M1 set of signal measurement pilot resources and/or the M2 sets of interference measurement pilot resources in the M sets of measurement pilot resources; or Determining, according to the channel state information of the M sets of measurement pilot resources, the M1 set of signal measurement pilot resources and/or the M2 sets of interference measurement pilot resources in the M sets of measurement pilot resources.

Optionally, using the M sets of measurement pilot resources for channel measurement, obtaining channel state information includes: using the M1 set of signals to measure pilot resources to obtain channel information of the signal; and using the M2 set of interference measurement pilot resources to obtain Interfering channel information; determining the channel state information according to channel information of the signal and the interference channel information, wherein the channel state information comprises at least one of: channel rank, precoding matrix index, channel quality indicator .

Optionally, using the M1 set of signals to measure channel information of the pilot resource obtaining signal includes: selecting, from the M1 set of signal measurement pilot resources, a signal measurement pilot resource that satisfies a predetermined condition, and using the selected signal to measure a pilot. And obtaining the interference channel information by using the M2 sets of interference measurement pilot resources, and: selecting, by using the M2 sets of interference measurement pilot resources, interference measurement pilot resources corresponding to the number of interference sources. The pilot channel resources are selected by using the selected interference measurement to obtain the interference channel information of each interference source.

According to an embodiment of the present invention, there is further provided a transmitting apparatus for measuring a pilot, comprising: a determining module, configured to determine M sets of measurement pilot resources, wherein the M sets of measurement pilot resources include an M1 set of signals The pilot resource and the M2 set of interference measurement pilot resources are measured, and the M, M1, and M2 are both positive integers; and the sending module is configured to send the determined M sets of measurement pilot resources.

Optionally, the method further includes: a first receiving module, configured to receive, by the terminal, channel state information determined according to the M sets of measurement pilot resources, where the channel state information includes at least one of the following information: a channel rank , precoding matrix index, channel quality indication.

According to an embodiment of the present invention, a feedback device for channel state information is provided, including: a second receiving module, configured to receive M sets of measurement pilot resources, where the M sets of measurement pilot resources include M1 The signal measurement pilot resource and the M2 set of interference measurement pilot resources, wherein the M, M1, and M2 are positive integers; and the measurement module is configured to perform channel measurement by using the M sets of measurement pilot resources to obtain channel state information; a feedback module configured to feed back the channel state information.

Optionally, the measuring module includes: a first obtaining unit, configured to use the M1 set signal to measure pilot resource to obtain channel information of the signal; and a second obtaining unit configured to use the M2 set of interference to measure pilot resources Acquiring the interference channel information; the determining unit is configured to determine the channel state information according to the channel information of the signal and the interference channel information, wherein the channel state information comprises at least one of the following information: channel rank, precoding Matrix index, channel quality indication.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is arranged to store program code for performing the above steps.

With the embodiment of the present invention, since the signal measurement pilot for performing signal measurement and the interference measurement pilot resource for performing interference measurement are respectively configured, channel information of the signal and channel information of the interference can be respectively obtained, thereby In order to obtain the accurate channel information of the main interfering base station, and to obtain the channel state information accurately, it is possible to solve the problem that the channel resources of the signal cannot be flexibly distinguished because the measurement pilot resources are not distinguished in the related art. Interest and interference channel information to distinguish between measurement problems.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a block diagram showing the hardware structure of a mobile terminal for a method for feeding back channel state information according to an embodiment of the present invention;

2 is a flowchart of a method for transmitting a measurement pilot according to an embodiment of the present invention;

3 is a schematic diagram of cooperation between two transmission nodes according to an embodiment of the present invention;

4 is a schematic diagram of pilot types in M sets of measurement pilots according to an embodiment of the present invention;

FIG. 5 is a flowchart of a method for feeding back channel state information according to an embodiment of the present invention; FIG.

6 is a structural block diagram of a transmitting apparatus for measuring pilots according to an embodiment of the present invention;

FIG. 7 is a structural block diagram of a feedback apparatus for channel state information according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

The method embodiments provided in this embodiment can be implemented in a mobile terminal, a computer terminal, or the like. Taking a mobile terminal as an example, FIG. 1 is a hardware structural block diagram of a mobile terminal for a method for feeding back channel state information according to an embodiment of the present invention. As shown in FIG. 1, mobile terminal 10 may include one or more (only one shown in FIG. 1) processor 102 (processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA. a memory 104 configured to store data, and a transmission device set as a communication function 106. It will be understood by those skilled in the art that the structure shown in FIG. 1 is merely illustrative and does not limit the structure of the above electronic device. For example, the mobile terminal 10 may also include more or fewer components than those shown in FIG. 1, or have a different configuration than that shown in FIG.

The memory 104 can be configured as a software program and a module for storing application software, such as a program instruction/module corresponding to the feedback method of the channel state information in the embodiment of the present invention, and the processor 102 runs the software program and the module stored in the memory 104. Thereby performing various functional applications and data processing, that is, implementing the above method. Memory 104 may include high speed random access memory, and may also include non-volatile memory such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 104 may further include memory remotely located relative to processor 102, which may be connected to mobile terminal 10 over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Transmission device 106 is arranged to receive or transmit data via a network. The above-described network specific example may include a wireless network provided by a communication provider of the mobile terminal 10. In one example, the transmission device 106 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 106 can be a Radio Frequency (RF) module configured to communicate with the Internet wirelessly.

FIG. 2 is a flowchart of a method for transmitting a measurement pilot according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

Step S202, determining a set of measurement pilot resources, wherein the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and an M2 set of interference measurement pilot resources, wherein the M, M1, and M2 are positive integers;

Step S204: Send the determined M sets of measurement pilot resources.

The above operation may be performed by the base station, but is not limited thereto. It should be noted that, in various embodiments of the present invention, the base station may include, but is not limited to, a plurality of wireless communication devices, such as a macro base station, a micro base station, and a wireless access point; and the M sets of measurement pilot resources may be sent to the terminal. End The terminals may include, but are not limited to, various receiving devices such as data cards, mobile phones, notebook computers, personal computers, tablet computers, personal digital assistants, and Bluetooth.

Through the above steps, since the signal measurement pilots for performing signal measurement and the interference measurement pilot resources for performing interference measurement are respectively configured, channel information of the signal and channel information of the interference can be respectively obtained, thereby obtaining main interference. The accurate channel information of the base station is used to accurately obtain the channel state information. Therefore, it can solve the problem that the measurement pilot resources are not distinguished in the related art, and thus the channel information and the interference channel information of the signal cannot be flexibly distinguished. The problem of measurement.

In an optional embodiment, the signal measurement pilot resource is used to measure channel information and/or channel state information of the target signal, and the interference measurement pilot resource is used to measure channel information and/or channel state information of the interference signal. .

Without loss of generality, in the present embodiment, two transmission nodes are taken as an example, but it should be noted that the method in the embodiment of the present invention can be applied to more than two cooperative nodes. As shown in FIG. 3, two cooperations TP1, TP2, wherein each TP can be configured with more than one transmit antenna, they cooperate with each other in order to better serve the user equipment UE. The transmitting node (ie, the base station) and the user (corresponding to the foregoing terminal, or simply referred to as the UE) may first configure the M sets of measurement pilot resources by the base station when transmitting and receiving the measurement pilot resources, and send the M sets of measurement pilots. The above-mentioned M sets of measurement pilot resources may be CSI-RS pilot resources in LTE/LTE A, or may be pilot resources used to obtain channel state information in other communication standards without loss of generality. The CSI-RS resource in LTE A is taken as an example for description. The M1 sets of measurement pilot resources (CSI-RS resource) configured by the base station are used for signal measurement pilot resources, and are used for measuring channel state information of the target signal, such as channel H, PMI, RI, CQI, CRI. (CSI-RS resource Index), etc., where H denotes a base-to-terminal channel matrix, which is a complex matrix. The M2 set is used for interference measurement pilot resources, and is used for terminal measurement of channel state information of interference signals. The interference such as interference is mainly strong interference to the target signal, such as interference of the cooperative set TP2.

Preferably, M1+M2=M, and M and M1, M2 are both positive integers. Base station can be dynamic Specifically, flexibly designate an arbitrary set of CSI-RS resources to measure pilot resources for signals, or to measure pilot resources for interference. Therefore, the base station can instruct the user to flexibly measure the target channel and the interference channel, and can flexibly and accurately calculate the channel state information and the like. As shown in FIG. 4, taking 4 sets of CSI-RS as an example, example 1 is that the base station indicates that the first set and the second set of measurement pilot resources are signal measurement pilot resources, and the third set and the fourth set of measurement pilot resources are Interference measurement pilot resources, example 2 is that the base station indicates that the first set of measurement pilot resources is a signal measurement pilot resource, and the second, third, and fourth sets of measurement pilot resources are interference measurement pilot resources, and example 3 is The base station indicates that the first set and the third set of measurement pilot resources are signal measurement pilot resources, and the second set and the fourth set of measurement pilot resources are interference measurement pilot resources.

The above-mentioned M sets of measurement pilots may belong to the K sets of CSI-RS resources configured in the LTE and LTEA with the eMIMO Type being Class B K=M>1, but they may be non-precoded CSI-RSs.

In an optional embodiment, the method further includes: receiving, by the terminal, channel state information determined according to the M sets of measurement pilot resources, where the channel state information includes at least one of the following: channel rank, precoding matrix index , channel quality indication. In this embodiment, the M sets of measurement pilot resources may be sent to the terminal, and the terminal may obtain the channel information and the interference channel information of the signal according to the signal measurement pilot resources and the interference measurement pilot resources in the M sets of measurement pilot resources. , thereby determining channel state information.

In an optional embodiment, determining the M sets of measurement pilot resources includes: selecting the M sets of measurement pilot resources from available measurement pilot resources, where the number of the available measurement pilot resources is greater than or equal to M. In this embodiment, when selecting a set of measurement pilot resources from the available measurement pilot resources, the selection may be performed according to a predetermined rule, where the predetermined rule may include, but is not limited to, at least one of the following: a time sequence, measuring the pilot resources. Index order, order of appointments.

In an optional embodiment, sending the determined M sets of measurement pilot resources includes: transmitting the determined M sets of measurement pilot resources by using a subframe in a non-periodic manner; or The M sets of measurement pilot resources are transmitted through M subframes in a periodic transmission manner. In this embodiment, the foregoing two transmission modes are the preferred transmission methods of the measurement pilot resources, and in the actual application, the following transmission mode may also be adopted: The above-mentioned M sets of measurement pilot resources are transmitted through one subframe in a periodic transmission manner; or, the determined M sets of measurement pilot resources are transmitted through M subframes in a non-periodic transmission manner.

In an optional embodiment, when the determined M sets of measurement pilot resources are sent by M subframes in a periodic manner, the measurement pilot parameters of the M sets of measurement pilot resources are configured the same, where The measurement pilot parameters include at least one of the following: a port number, a subframe offset, and a period. It should be noted that, in this embodiment, it is a preferred mode to configure the measurement pilot parameters to be the same. In this configuration mode, the interference and the signal can share the measurement pilot parameters, and the base station configuration is not required to be configured differently. Measuring pilot parameters. However, it should be noted that, in practical applications, the measurement pilot parameters may also be configured as different parameters. The following describes the following several embodiments:

The above-mentioned M sets of measurement pilots may be sent by the base station in the same subframe. For example, it may be sent after the aperiodic CSI-RS trigger, and the user is informed by the signaling of the time domain, frequency domain location, and sub-transmission. Frame number, M sets of measurement pilot parameter information, such as the number of ports of each set of measurement pilots N _k , the port pattern, the pilot sequence, and so on. Of course, the M sets of measurement pilots may also be periodically transmitted CSI-RSs, where they have the same measurement pilot parameter configuration, including the same number of ports, the same subframe offset, the same period, and the like.

In an optional embodiment, the method further includes: transmitting channel measurement restriction signaling. In this embodiment, the base station needs to configure a channel measurement restriction command, so that the user does not average different CSI-RSs when performing channel measurement. Because they come from different base stations, there may be interference, and it may be a signal. The signaling of the measurement limit includes the time window of the measurement, the length of the window, and the like. An example is that the window length is 1, that is, the measurement of each sub-frame is performed separately and is not averaged with other sub-frames.

In an optional embodiment, the method further includes: transmitting quasi-co-location parameter information for indicating quasi-common position information of the M sets of measurement pilot resources.

In the embodiment of the present invention, the Quasi-Co-Location (QLC) parameter information is used to indicate the quasi-common position information parameter set of the M sets of measurement pilot resources. Quoted. The quasi-location information parameter set includes a configuration of a plurality of parameters, and the configuration transmission node or the base station may notify the terminal by using high layer signaling, where the parameter set includes, but is not limited to, the following parameters in LTE:

Configuration parameter information of one CRS, including the number of ports and the parameters of the frequency domain shift;

Multicast/multicast single frequency network (MBSFN) subframe configuration parameter information;

Parameter configuration information of Zero Power (ZP) CSI-RS;

Configuration information of the physical downlink shared channel start symbol parameter PDSCH starting position;

One non-zero power (Non-Zero Power, nicknamed NZP) CSI-RS information (qcl-NZP CSI-RS).

In the process of data transmission, after knowing the quasi-co-location parameter set, the terminal knows the CSI-RS of the current data transmission notification, and the CSI-RS pilot transmitted and notified by the user DMRS, which is a quasi-co-location, and the two are sent. The large-scale characteristic of the channel having approximately the same as the notified CSI-RS pilot can be understood as the current data being transmitted by the same base station as the DMRS. When the terminal feeds back, the N1 set of pilot pilot CSI-RSs used to calculate channel state information are from the same base station, they have the same quasi-common position parameters, or one set of interference measurements when measuring interference. The pilot is quasi-co-located, it comes from interfering base station 1, and the other set of interference measurement pilots is quasi-co-located, it comes from interfering base station 2 and so on. In summary, the quasi-co-location parameter set is used to tell the user which measurement pilot port groups are from the same base station.

In an optional embodiment, the quasi-common position information of the M sets of measurement pilot resources includes at least one of the following: the M1 set of signal measurement pilot resources have the same quasi-co-location parameter information (for example, all ports are quasi-standard The above-mentioned M2 sets of interference measurement pilot resources have different quasi-common position parameter information from the M1 set of signal measurement pilot resources. Optionally, at least one set of interference measurement pilot resources in the M2 set of interference measurement pilot resources has different quasi-co-location parameter information from other interference measurement pilot resources, or the M2 sets of interference measurement pilot resources have the same standard Common position parameter information. In this embodiment, when the quasi-common position parameter information is the same, the description Each signal (or each interference) is from the same base station, and correspondingly, the signals (or interferences) with different quasi-common position parameter information are from different base stations. It can be seen from the foregoing embodiment that the base station can also send the quasi-location parameter information, for example, by using high-level signaling to notify several sets of resource configuration parameter information, and then notify the user of the quasi-common position information of the current sub-frame through physical layer signaling. Wherein, in the quasi-common position parameter information, the port of the M1 set signal measurement pilot resource belongs to a quasi-co-location. And the M2 set of interference measurement pilot resources and the M1 set of signal measurement pilot resources are not quasi-co-located. The M2 sets of interference measurement pilot resources may not be quasi-co-located with each other, ie they may be from different TPs.

In an optional embodiment, the method further includes: transmitting pilot type signaling for indicating the type of the M sets of measurement pilot resources.

In an optional embodiment, the pilot type signaling is used to indicate one of: indicating that any one of the M sets of measurement pilot resources is a signal measurement pilot resource or an interference measurement pilot. Resources; indicating signal measurement pilot resources in the M sets of measurement pilot resources; indicating interference measurement pilot resources in the M sets of measurement pilot resources.

In an optional embodiment, the pilot type signaling is used to indicate that the M1 set of the M sets of measurement pilot resources is a signal measurement pilot resource and/or the M2 set is an interference measurement pilot resource.

In an optional embodiment, the transmitting of the pilot type signaling for indicating the type of the M sets of measurement pilot resources includes: transmitting the pilot type signaling by using physical layer signaling and/or higher layer signaling. In the above embodiment, the pilot type signaling (or the measurement pilot signaling) may be used for high layer signaling or physical layer signaling, and the signaling is used to indicate the M sets of measurement pilot resources. The type of measurement pilot resource in the above-mentioned M sets of measurement pilot resources is used to measure interference or to measure signals. For example, in the form of a bitmap, such as signaling with M bit, each bit corresponds to a set of CSI-RS resources, when it is 0, it is a signal measurement pilot resource, and when it is 1, it represents interference measurement resources, such as in FIG. Example 1 is represented as 0011, Example 2 is represented as 0111, and Example 3 is represented as 0101. Of course, it is also possible to use 1 for signal measurement resources and 0 for interference measurement resources, which can be agreed according to standards. Optionally, the above pilot type letter Alternatively, only the measurement pilot resources for measuring signal in the M sets of resources may be indicated. In this case, the measurement pilot resources other than the signal measurement pilot resources may be agreed as the interference measurement pilot resources. For example, in FIG. 4, in the example 1, the base station sends signaling including a value of 1, 2, indicating that the first set and the second set of resources are signal measurement pilot resources. If it is further agreed that the signal measurement resources are continuously allocated, for example, if the value of the signaling is 2, it means that the resource index is less than or equal to 2, and the signal measurement pilot resources are all. Conversely, the above signaling is only a resource that interferes with the measurement pilot, and it is agreed that all of the interference measurement pilots are signal measurement resources. In addition, in the case where the number of signal measurement pilot resources is fixed, the base station and the terminal may agree that the fixed frequency domain (or pattern) or the time domain location (such as the M1 set from the beginning of the cycle is a signal measurement pilot resource) is a signal measurement. Pilot resources. In this way, the base station may not transmit the pilot type signaling, but this will make the resource type allocation lack certain flexibility, but can save signaling overhead.

FIG. 5 is a flowchart of a method for feeding back channel state information according to an embodiment of the present invention. As shown in FIG. 5, the process includes the following steps:

Step S502: Receive M sets of measurement pilot resources, where the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and an M2 set of interference measurement pilot resources, where the M, M1, and M2 are positive integers;

Step S504: Perform channel measurement by using the foregoing M sets of measurement pilot resources to obtain channel state information.

Step S506, feeding back the channel state information.

The foregoing may be a terminal, and the foregoing method may be applied to the terminal shown in FIG. 1, but is not limited thereto.

Through the above steps, since the signal measurement pilots for performing signal measurement and the interference measurement pilot resources for performing interference measurement are respectively configured, channel information and/or channel state information of the signal, and interference channels can be respectively obtained. Information and/or channel state information, which in turn obtains accurate channel information of the main interfering base station, thereby effectively eliminating interference. Therefore, accurate channel information that cannot be obtained by the main interfering base station in the related art can be solved, and the channel state cannot be accurately obtained. Information problem.

It can be seen from the foregoing embodiment that the M1 set of measurement pilot resources (CSI-RS resource) configured by the base station has M1 set for channel state information or channel information of the terminal measurement signal, and the M2 set is used for the terminal to measure interference related channel information or channel state. information. Preferably, M1+M2=M, and M and M1, M2 are both positive integers. But in general, unless the base station and the terminal agree on which of the M sets of measurement pilot resources are signal measurement pilot resources or interference measurement pilot resources, the terminal does not know where to measure the channel state information or channel of the interference and signal. information. The M sets of measurement pilots may belong to the K sets of CSI-RS resources configured in the LTE and LTEA with the eMIMO Type being Class B K=M>1, but they may be non-precoded CSI-RSs.

In an optional embodiment, receiving the M sets of measurement pilot resources comprises: receiving, in one subframe, M sets of measurement pilot resources sent in a non-periodic transmission manner.

In an optional embodiment, receiving the M sets of measurement pilot resources includes: receiving, on the M subframes, M sets of measurement pilot resources that are sent in a periodic transmission manner.

In an optional embodiment, when receiving the M sets of measurement pilot resources that are sent in a periodic transmission manner on the M subframes, the measurement pilot parameters of the M sets of measurement pilot resources are configured the same, where The measurement pilot parameter includes at least one of the following: a port number, a subframe offset, and a period. It should be noted that, in this embodiment, it is a preferred mode to configure the measurement pilot parameters to be the same. In this configuration mode, the interference and the signal can share the measurement pilot parameters, and the base station configuration is not required to be configured differently. Measuring pilot parameters. However, it should be noted that, in practical applications, the measurement pilot parameters may also be configured as different parameters. In the above embodiment, the terminal may receive M sets of measurement pilot resources in the same subframe. And receiving the measurement pilot parameter information of the base station, the parameter information telling the terminal the time domain of the M sets of measurement pilots, the frequency domain location, the subframe number, and the parameter information of the M sets of measurement pilots, such as each set of measurement pilots. At least one of the port number N _k (different measurement pilot resources may have different number of ports), port pattern, pilot sequence, and the like. Optionally, the terminal may also receive the foregoing M sets of measurement pilot resources in different subframes, and have the same measurement pilot parameter configuration, including the same number of ports, the same subframe offset, and the same period. Wait.

In an optional embodiment, the method further includes: receiving channel measurement restriction signaling. In this embodiment, the terminal receives the measurement restriction command sent by the base station, so that the terminal user does not average different CSI-RSs when performing channel measurement. The signaling of the measurement limit includes the time window of the measurement, the length of the window, and the like. An example is that the window length is 1, that is, the measurement of each sub-frame is performed separately and is not averaged with other sub-frames.

In an optional embodiment, the method further includes: receiving quasi-common position parameter information; and determining quasi-common position information of the M sets of measurement pilot resources according to the quasi-common position parameter information.

In an optional embodiment, the quasi-common position information of the M sets of measurement pilot resources includes at least one of the following: the M1 set of signal measurement pilot resources have the same quasi-common position parameter information; and the M2 set interference measurement guide The frequency resource and the M1 set of signal measurement pilot resources have different quasi-co-location parameter information; at least one set of the interference measurement pilot resources in the M2 sets of interference measurement pilot resources have different quasi-common positions from other interference measurement pilot resources. Parameter information.

In the embodiment of the present invention, if the base station and the terminal agree which of the M sets of resources are the signal measurement pilot resources or the interference measurement pilot resources, the terminal may directly obtain the type of the M sets of measurement pilot resources. Otherwise, the terminal needs to further receive measurement pilot resource type signaling.

In an optional embodiment, the method further includes: receiving pilot type signaling for indicating the type of the M sets of measurement pilot resources, and determining, according to the pilot type signaling, the M sets of measurement pilot resources. The M1 set of signal measurement pilot resources and/or M2 sets of interference measurement pilot resources.

In an optional embodiment, the pilot type signaling is used to indicate one of the following: indicating that any one of the M sets of measurement pilot resources is a signal measurement pilot resource or an interference measurement pilot resource. Indicating the signal measurement pilot resources in the M sets of measurement pilot resources; indicating the interference measurement pilot resources in the M sets of measurement pilot resources.

In an optional embodiment, the pilot type signaling is used to indicate the M sets of measurement pilots. The M1 set in the resource is the signal measurement pilot resource and/or the M2 set is the interference measurement pilot resource.

In the foregoing embodiment, when the pilot type signaling indicates that the M sets of measurement pilot resources are signal measurement pilot resources or interference measurement pilot resources, the M sets of measurement pilots may be determined according to pilot type signaling. The M1 set is the signal measurement pilot resource, and the M2 set is the interference measurement pilot signal. When the pilot type signaling is only indicating the signal measurement pilot resource, the M1 set in the M sets of measurement pilots may be first determined as the signal measurement pilot resource, and the M2 set outside the M1 set measurement pilot resource is determined as the interference. Measure pilot resources. When the pilot type signaling only indicates the interference measurement pilot resource, the M2 set in the M sets of measurement pilots may be determined as the interference measurement pilot resource, and the M1 set outside the M2 set interference measurement pilot resource is determined as the signal. Measure pilot resources.

In an optional embodiment, the method further includes: determining, according to a manner agreed with the base station, the M1 set of signal measurement pilot resources and/or the M2 set of interference measurement pilot resources in the M sets of measurement pilot resources. In this embodiment, the terminal may determine, according to a manner agreed by the base station, the M1 set in the M sets of measurement pilot resources as the signal measurement pilot resource, and the M2 set as the interference measurement pilot resource. At this time, it is not necessary to receive any measurement pilot resource type signaling.

In an optional embodiment, the method further includes: determining, according to the channel state information of the M sets of measurement pilot resources, the M1 set of signal measurement pilot resources and/or the M2 set of interference measurement pilots in the M sets of measurement pilot resources. Resources. In this embodiment, the terminal may calculate channel state information of the M sets of measurement pilots, such as channel quality information, received power, received signal to noise ratio, and received signal dry ratio, and determines the M1 set as a signal according to the channel state information. The pilot resource and/or the M2 set are measured as interference measurement pilot resources. For example, the M1 set that determines the channel state information is the signal measurement pilot resource, and the remaining M2 sets are the interference measurement pilot resources; or the channel state is determined. The M 2 set with the smallest information is the interference measurement pilot resource, and the remaining M1 sets are the signal measurement pilot resources.

In an optional embodiment, the channel measurement is performed by using the foregoing M sets of measurement pilot resources, and obtaining channel state information includes: using the M1 set of signals to measure pilot resources to obtain channel information of the signal; and using the M2 set of interference measurement pilots. The resource obtains the interference channel information, and determines the channel state information according to the channel information of the signal and the interference channel information, where The channel state information includes at least one of the following information: a channel rank, a precoding matrix index, and a channel quality indicator.

Of course, in the process of determining the channel state information by using the channel information according to the foregoing signal and the interference channel information, the statistical information of the interference and noise except the target signal and the interference channel may be further measured according to the interference measurement pilot. And determining channel state information together with the channel information of the signal according to the statistical information of the interference and noise and the interference channel information.

In an optional embodiment, the measuring channel information of the pilot resource obtained by using the M1 set signal includes: selecting a signal measurement pilot resource that satisfies a predetermined condition from the M1 set of signal measurement pilot resources, and using the selected signal. Measuring the channel information of the pilot resource obtaining signal; and/or obtaining the interference channel information by using the M2 set of interference measurement pilot resources, including: selecting the interference measurement pilot corresponding to the number of interference sources from the M2 sets of interference measurement pilot resources The resource is obtained by using the selected interference measurement measurement pilot resource to obtain the interference channel information of each interference source. In the foregoing embodiment, after determining the signal measurement pilot resource and the interference measurement pilot resource information, the terminal measures channel state information or channel information of the signal on the signal measurement pilot resource, and measures the interference on the interference measurement pilot resource. Channel status information or channel information. The following describes the specific measurement methods:

If M1 is greater than 1, then a set of better-performing measurement pilot resources needs to be selected according to certain rules for measurement of signal channel state information. For example, by maximizing the received power, the port corresponding to the measurement pilot resource with the largest signal to noise ratio is measured to measure the channel state information of the signal. If M1=1, the measurement of the channel information or channel state information of the signal by the pilot resource is directly based on the set of signals. It is assumed below that the measurement pilot resources for measuring the channel state information of the signal have been selected. And there are M2 TP interferences to be measured, wherein each TP can be configured with one measurement pilot resource (CSI-RS) for measuring channel information of interference. Without loss of generality, assuming that there is only one interfering base station, the situation of multiple interfering base stations can be obtained similarly. In addition, in order to measure co-channel interference outside the cooperative base station, the terminal needs to measure the value of its interference on one CSI-IM.

As shown in FIG. 3, assuming that two TPs are non-coherent JTs, when two TPs are non-coherent JTs, the received signal of the UE can be expressed as:

y=H ₁ u ₁ x ₁ +H ₂ u ₂ x ₂ +I+w

H ₁ is the channel matrix of TP1 to UE, H _{2 is the} channel matrix of TP2 to UE respectively; u ₁ is the precoding matrix of TP1 transmission data, u ₂ is the precoding matrix of TP2 transmission data; x ₁ is TP1 transmission The symbol, x ₂ is the symbol transmitted by TP2; I is the interference from other TPs, and w is the noise.

If the base station does not use advanced interference cancellation algorithm, it will also function as interference TP2, measured by CSI-IM, the SNR can be calculated _{_{as: γ 1 = | H 1 u}} 1 | 2 / P I, wherein, H ₁ For the channel matrix measured on CSI-RS1, P _I is the interference power measured on the IMR, u _i is the assumption of the UE to the TP precoding matrix, and |.| ₂ is the two norm operation. If the TP is configured with PMI feedback, u ₁ may be assumed to be the PMI fed back by the UE; and in the absence of PMI feedback, the UE may assume the precoding matrix of the base station according to the channel H ₁ . If the channel of TP2 can be measured, that is, the CSI-RS1 is used to measure the channel information H ₁ of the signal, and the pre-encoded u ₁ information is obtained with it. TP2 measured by the user to CEI-RS2 channel H _2, and to _(2, such as the largest SNR u _2, or a minimum signal to noise ratio u), then the SNR can be more accurately obtained according to H ₂ obtained u ₂ The calculation formula: γ ₁ =|H ₁ u ₁ | ₂ /(|H ₂ u ₂ | ₂ +P _I ), so that the performance of the system can be improved.

If the base station uses advanced interference cancellation receiver, the user u ₂ of H ₂ obtained first estimated interference signal, and the received signal by subtracting the interference signal, a signal can be obtained without interference TP2, then SNR for:

γ ₁ =|H ₁ u ₁ | ₂ /(P _I )

Again, here, a similar analysis can be performed on TP2 to get the case of TP2.

For the case of CSCB, for TP1 service users, TP2 can be regarded as interference, so that more accurate channel state information feedback can be obtained according to similar analysis.

The user feeds back the signal-to-noise ratio information calculated according to the above method, so as to traverse the selected precoding matrix u1 according to the channel ratio information, including how many columns of information u1 is, that is, channel rank information, and after determining u1 and RI, the pair corresponds to The signal-to-noise ratio corresponds to the index information of the MCS. Go to the CQI information and feed back the channel state information.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

A transmitting device for measuring a pilot is also provided in this embodiment, and the device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 6 is a structural block diagram of a transmitting apparatus for measuring a pilot according to an embodiment of the present invention. As shown in FIG. 6, the apparatus includes a determining module 62 and a transmitting module 64, which are described below:

The determining module 62 is configured to determine the M sets of measurement pilot resources, where the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and an M2 set of interference measurement pilot resources, where the M, M1, and M2 are positive. The integer module is connected to the determining module 62, and is configured to send the determined M sets of measurement pilot resources.

In an alternative embodiment, M1 + M2 = M.

In an optional embodiment, the foregoing apparatus further includes a first receiving module, configured to receive channel state information determined by the terminal according to the M sets of measurement pilot resources, where the channel is The state information includes at least one of the following information: channel rank, precoding matrix index, channel quality indication. In this embodiment, the M sets of measurement pilot resources may be sent to the terminal, and the terminal may obtain the channel information and the interference channel information of the signal according to the signal measurement pilot resources and the interference measurement pilot resources in the M sets of measurement pilot resources. , thereby determining channel state information.

In an optional embodiment, the determining module 62 may determine, according to the following manner, the M sets of measurement pilot resources: selecting the M sets of measurement pilot resources from the available measurement pilot resources, where the available measurement pilot resources are available. The number is greater than or equal to M.

In an optional embodiment, the sending module 64 may send the determined M sets of measurement pilot resources to the terminal by using the determined one set of the measurement pilot resources in a non-periodic manner. The frame is sent to the terminal.

In an optional embodiment, the sending module 64 may send the determined M sets of measurement pilot resources to the terminal by: transmitting the determined M sets of measurement pilot resources by using M subframes in a periodic manner. Send to the terminal.

In an optional embodiment, when the determined M sets of measurement pilot resources are sent by M subframes in a periodic manner, the measurement pilot parameters of the M sets of measurement pilot resources are configured the same, where The measurement pilot parameters include at least one of the following: a port number, a subframe offset, and a period.

In an optional embodiment, the sending module 64 is further configured to send quasi-common position parameter information for indicating quasi-common position information of the M sets of measurement pilot resources.

In an optional embodiment, the quasi-common position information of the M sets of measurement pilot resources includes at least one of the following: the M1 set of signal measurement pilot resources have the same quasi-common position parameter information; and the M2 set interference measurement guide The frequency resource and the M1 set of signal measurement pilot resources have different quasi-co-location parameter information. Optionally, at least one set of interference measurement pilot resources in the M2 set of interference measurement pilot resources has different quasi-co-location parameter information from other interference measurement pilot resources, or the M2 sets of interference measurement pilot resources have the same standard Common position parameter information. In this embodiment, when the quasi-common position parameter information is the same, it is indicated that each signal (or each interference) is from the same base station, and correspondingly, the signals (or interferences) with different quasi-common position parameter information are from different base stations.

In an optional embodiment, the sending module is further configured to send pilot type signaling for indicating the type of the M sets of measurement pilot resources.

In an optional embodiment, the pilot type signaling is used to indicate one of the following: indicating that any one of the foregoing sets of measurement pilot resources is a signal measurement pilot resource or an interference measurement pilot. a resource; indicating a signal measurement pilot resource in the M sets of measurement pilot resources; and indicating an interference measurement pilot resource in the M sets of measurement pilot resources.

In an optional embodiment, the sending module is further configured to send pilot type signaling for indicating the type of the M sets of measurement pilot resources, including: sending, by using physical layer signaling and/or high layer signaling, Pilot type signaling.

7 is a structural block diagram of a feedback device for channel state information according to an embodiment of the present invention. As shown in FIG. 7, the device includes a second receiving module 72, a measuring module 74, and a feedback module 76. The device is described below:

The second receiving module 72 is configured to receive the M sets of measurement pilot resources, where the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and an M2 set of interference measurement pilot resources, where the M, M1, and M2 are The measurement module 74 is connected to the second receiving module 72, and is configured to perform channel measurement by using the M sets of measurement pilot resources to obtain channel state information. The feedback module 76 is connected to the measurement module 74 and configured as feedback. The above channel state information.

In an alternative embodiment, M1+M2=M above.

In an optional embodiment, the foregoing second receiving module 72 may receive the M sets of measurement pilot resources by receiving the transmission in an aperiodic manner in one subframe. Said M sets of measurement pilot resources.

In an optional embodiment, the second receiving module 72 may receive the M sets of measurement pilot resources by receiving the M sets of measurement pilot resources that are sent in a periodic transmission manner on the M subframes.

In an optional embodiment, when the M sets of measurement pilot resources that are sent in a periodic transmission manner are received on the M subframes, the measurement pilot parameters of the M sets of measurement pilot resources are configured the same, including the following: One: the same number of ports, the same subframe offset, the same period.

In an optional embodiment, the second receiving module 72 is further configured to receive channel measurement restriction signaling.

In an optional embodiment, the second receiving module 72 is further configured to receive quasi-common position parameter information, and determine quasi-common position information of the M sets of measurement pilot resources according to the quasi-co-location parameter information.

In an optional embodiment, the quasi-common position information of the M sets of measurement pilot resources includes at least one of the following: the M1 set of signal measurement pilot resources have the same quasi-common position parameter information; and the M2 sets of interference measurement pilot resources There is different quasi-co-location parameter information with the M1 set of signal measurement pilot resources; at least one set of interference measurement pilot resources in the M2 sets of interference measurement pilot resources have different quasi-co-location parameter information from other interference measurement pilot resources.

In an optional embodiment, the foregoing second receiving module 72 is further configured to receive pilot type signaling for indicating the type of the M sets of measurement pilot resources, and determine the M sets of measurement guides according to the pilot type signaling. The M1 set of signals in the frequency resource measures pilot resources and/or M2 sets of interference measurement pilot resources.

In an optional embodiment, the apparatus further includes a processing module, configured to determine, according to a manner agreed with the base station, the M1 set of signal measurement pilot resources and/or the M2 set in the M sets of measurement pilot resources. Interference measurement pilot resources; or, according to the channel state information of the M sets of measurement pilot resources, determine M1 sets of signal measurement pilot resources and/or M2 sets of interference measurement pilot resources in the M sets of measurement pilot resources.

In an optional embodiment, the measurement module 74 includes a first obtaining unit, a second obtaining unit, and a determining unit. The measuring module 74 is described below. The first obtaining unit is configured to measure by using the M1 set signal. The pilot resource obtains channel information of the signal; the second obtaining unit is configured to obtain the interference channel information by using the M2 set of interference measurement pilot resources; and the determining unit is configured to determine the channel state information according to the channel information of the signal and the interference channel information. The channel state information includes at least one of the following information: a channel rank, a precoding matrix index, and a channel quality indicator.

In an optional embodiment, the measurement module 74 can obtain channel information of the signal by using the M1 set signal measurement pilot resource by selecting a signal measurement pilot that satisfies a predetermined condition from the M1 set of signal measurement pilot resources. a resource, using the selected signal to measure pilot resources to obtain channel information of the signal; and/or, obtaining the interference channel information by using the M2 set of interference measurement pilot resources as follows: selecting and interference from the M2 set of interference measurement pilot resources The interference measurement pilot resource corresponding to the source quantity; the pilot channel resource is selected by using the selected interference measurement to obtain the interference channel information of each interference source.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination. The forms are located in different processors.

Embodiments of the present invention also provide a storage medium. Alternatively, in the embodiment, the above storage medium may be arranged to store program code for performing the above steps.

Optionally, in this embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a random access memory (Random). Access Memory (referred to as RAM), mobile hard disk, disk or optical disk, and other media that can store program code.

Optionally, in the embodiment, the processor performs the above steps according to the stored program code in the storage medium.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, the method for transmitting a measurement pilot and the method and device for feeding back channel state information provided by the embodiments of the present invention have the following beneficial effects: the solution in the related art does not distinguish the measurement pilot resources, thereby The problem of distinguishing and measuring the channel information of the signal and the interference channel information flexibly.

Claims

A method for transmitting a measurement pilot includes:

Determining a set of measurement pilot resources, wherein the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and an M2 set of interference measurement pilot resources, wherein the M, M1, and M2 are positive integers;

Sending the determined set of M measurement pilot resources.
The method of claim 1, wherein the signal measurement pilot resource is used to measure channel information and/or channel state information of a target signal, the interference measurement pilot resource is used to measure channel information of the interference signal and/or Or channel status information.
The method of claim 1 wherein M1 + M2 = M.
The method of claim 1 wherein the method further comprises:

Receiving channel state information determined by the terminal according to the M sets of measurement pilot resources, where the channel state information includes at least one of the following information: a channel rank, a precoding matrix index, and a channel quality indicator.
The method of claim 1, wherein determining the M sets of measurement pilot resources comprises:

The M sets of measurement pilot resources are selected from available measurement pilot resources, wherein the number of available measurement pilot resources is greater than or equal to M.
The method of claim 1, wherein transmitting the determined set of measurement pilot resources comprises:

And determining, by using the one subframe, the determined set of measurement pilot resources to be sent in a non-periodic manner; or

And transmitting the determined M sets of measurement pilot resources by M subframes in a periodic transmission manner.
The method according to claim 6, wherein when the determined M sets of measurement pilot resources are transmitted through M subframes in a periodic transmission manner, the measurement pilot parameter configuration of the M sets of measurement pilot resources is configured. The same, wherein the measurement pilot parameters include at least one of the following:

Number of ports, subframe offset, period.
The method of claim 1 wherein the method further comprises:

And transmitting quasi-common position parameter information for indicating quasi-common position information of the M sets of measurement pilot resources.
The method of claim 8 wherein:

The M1 set of signal measurement pilot resources have the same quasi-co-location parameter information; and/or,

The M2 set of interference measurement pilot resources and the M1 set of signal measurement pilot resources have different quasi-co-location parameter information.
The method of claim 1 wherein the method further comprises:

Transmitting pilot type signaling for indicating the type of the M sets of measurement pilot resources, wherein the pilot type signaling is used to indicate one of the following:

And indicating that any one of the M sets of measurement pilot resources is a signal measurement pilot resource or an interference measurement pilot resource;

Indicating a signal measurement pilot resource in the M sets of measurement pilot resources;

Indicating interference measurement pilot resources in the M sets of measurement pilot resources;

The M1 set in the M sets of measurement pilot resources is indicated as a signal measurement pilot resource and/or the M2 set is an interference measurement pilot resource.
A method for feeding back channel state information includes:

Receiving M sets of measurement pilot resources, where the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and an M2 set of interference measurement pilot resources, where the M, M1, M2 is a positive integer;

Using the M sets of measurement pilot resources for channel measurement to obtain channel state information;

The channel state information is fed back.
The method according to claim 11, wherein the signal measurement pilot resource is used to measure channel information and/or channel state information of a target signal, the interference measurement pilot resource is used to measure channel information of the interference signal and/or Or channel status information.
The method of claim 11 wherein M1 + M2 = M.
The method of claim 11 wherein receiving M sets of measurement pilot resources comprises:

Receiving, in one subframe, the M sets of measurement pilot resources that are sent in a non-periodic manner; or

The M sets of measurement pilot resources transmitted in a periodic transmission manner are received on M subframes.
The method according to claim 14, wherein the measurement pilot parameter configuration of the M sets of measurement pilot resources is received when receiving the M sets of measurement pilot resources transmitted in a periodic transmission manner on M subframes The same, wherein the measurement pilot parameters include at least one of the following:

Number of ports, subframe offset, phase period.
The method of claim 11 wherein the method further comprises:

Receiving quasi-common position parameter information;

Determining quasi-common position information of the M sets of measurement pilot resources according to the quasi-common position parameter information.
The method according to claim 16, wherein the quasi-common position information of the M sets of measurement pilot resources comprises at least one of the following:

The M1 set of signal measurement pilot resources have the same quasi-common position parameter information;

The M2 set of interference measurement pilot resources and the M1 set of signal measurement pilot resources have different quasi-co-location parameter information.
The method of claim 11 wherein the method further comprises:

Receiving pilot type signaling for indicating a type of the M sets of measurement pilot resources, wherein the pilot type signaling is used to indicate one of: indicating any one of the M sets of measurement pilot resources The set of measurement pilot resources is a signal measurement pilot resource or an interference measurement pilot resource; indicating a signal measurement pilot resource in the M sets of measurement pilot resources; indicating interference measurement pilot in the M sets of measurement pilot resources a resource; indicating that the M1 set of the M sets of measurement pilot resources is a signal measurement pilot resource and/or the M2 set is an interference measurement pilot resource;

Determining, according to the pilot type signaling, the M1 set of signal measurement pilot resources and/or the M2 sets of interference measurement pilot resources in the M sets of measurement pilot resources.
The method of claim 11 wherein the method further comprises:

Determining, according to a manner agreed with the base station, the M1 set of signal measurement pilot resources and/or the M2 sets of interference measurement pilot resources in the M sets of measurement pilot resources; or

Determining, according to the channel state information of the M sets of measurement pilot resources, the M1 set of signal measurement pilot resources and/or the M2 sets of interference measurement pilot resources in the M sets of measurement pilot resources.
The method according to claim 11, wherein the channel measurement is performed by using the M sets of measurement pilot resources, and obtaining channel state information comprises:

Using the M1 set of signals to measure pilot resources to obtain channel information of the signal;

Obtaining interference channel information by using the M2 set of interference measurement pilot resources;

Determining the channel based on channel information of the signal and the interference channel information State information, wherein the channel state information comprises at least one of: a channel rank, a precoding matrix index, and a channel quality indicator.
The method of claim 20, wherein

The channel information obtained by using the M1 set of signal measurement pilot resources to obtain a signal includes: selecting, from the M1 set of signal measurement pilot resources, a signal measurement pilot resource that satisfies a predetermined condition, and using the selected signal to measure a pilot resource to obtain a signal. Channel information; and/or,

Obtaining interference channel information by using the M2 set of interference measurement pilot resources includes: selecting interference measurement pilot resources corresponding to the number of interference sources from the M2 sets of interference measurement pilot resources; and using the selected interference measurement to measure pilot resources respectively Obtain interference channel information of each interference source.
A transmitting device for measuring pilots, comprising:

The determining module is configured to determine the M sets of measurement pilot resources, where the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and an M2 set of interference measurement pilot resources, where the M, M1, and M2 are Positive integer

And a sending module, configured to send the determined set of measurement pilot resources.
The device of claim 22, wherein the device further comprises:

The first receiving module is configured to receive channel state information determined by the terminal according to the M sets of measurement pilot resources, where the channel state information includes at least one of the following information: a channel rank, a precoding matrix index, and a channel quality indicator.
A feedback device for channel state information, comprising:

The second receiving module is configured to receive the M sets of measurement pilot resources, where the M sets of measurement pilot resources include an M1 set of signal measurement pilot resources and an M2 set of interference measurement pilot resources, where the M, M1, and M2 are Are positive integers;

a measuring module, configured to perform channel measurement by using the M sets of measurement pilot resources to obtain channel state information;

a feedback module configured to feed back the channel state information.
The apparatus of claim 24 wherein said measuring module comprises:

a first obtaining unit, configured to use the M1 set of signals to measure pilot resources to obtain channel information of the signal;

a second obtaining unit, configured to obtain interference channel information by using the M2 set of interference measurement pilot resources;

a determining unit, configured to determine the channel state information according to channel information of the signal, and the interference channel information, where the channel state information includes at least one of: channel rank, precoding matrix index, channel quality Instructions.
A storage medium, the storage medium comprising a stored program, wherein the program is executed to perform the method of any one of claims 1 to 21.