CN108667491B

CN108667491B - Sending method, receiving method, related equipment and system of PMI information

Info

Publication number: CN108667491B
Application number: CN201710202827.4A
Authority: CN
Inventors: 李建军
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2017-03-30
Filing date: 2017-03-30
Publication date: 2020-06-26
Anticipated expiration: 2037-03-30
Also published as: CN108667491A

Abstract

The invention discloses a sending method, a receiving method, related equipment and a system of PMI information, wherein the method comprises the following steps: sending first downlink control information to a user terminal, wherein the first downlink control information comprises indication information of a plurality of PRGs (physical resource identifiers) allocated to the user terminal and position indication information of downlink resources; and sending PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal through the downlink resource. Because PMI information of a plurality of precoding matrices is sent to the user terminal aiming at a plurality of PRGs, the user terminal can use corresponding precoding matrices on different PRGs, thereby improving the precoding performance and the transmission performance of a communication system.

Description

Sending method, receiving method, related equipment and system of PMI information

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a device and a system for sending Precoding Matrix Indication (PMI) information.

Background

In the current communication system, a user terminal usually performs precoding of an uplink signal on a Physical Resource Group (PRG) allocated by a network side device, and transmits the precoded signal to the network side device through an antenna to complete transmission of the uplink signal.

However, no matter one or multiple PRGs are allocated to the ue, the network side device configures a precoding matrix for the ue, and notifies the ue of PMI Information of the precoding matrix through a downlink Control Information format (dciformation) message, that is, all PRGs share one precoding matrix.

In practical application, due to the selectivity of channel frequency and the difference of channels of different PRGs, the same precoding matrix configured for the user terminal is not matched with all PRGs, that is, the precoding matrix configured for the user terminal is not the optimal precoding matrix of all PRGs allocated to the user terminal, and when the user terminal uses the precoding matrix to perform precoding of uplink signals on the PRGs, the precoding performance is poor.

Disclosure of Invention

The embodiment of the invention provides a sending method, a receiving method, related equipment and a system of PMI information, and aims to solve the problem of poor precoding performance.

In a first aspect, an embodiment of the present invention provides a method for sending PMI information, including:

sending first downlink control information to a user terminal, wherein the first downlink control information comprises indication information of a plurality of PRGs (physical resource identifiers) allocated to the user terminal and position indication information of downlink resources;

and sending PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal through the downlink resource.

In a second aspect, an embodiment of the present invention further provides a method for receiving PMI information, including:

receiving first downlink control information sent by a network side device, wherein the first downlink control information comprises indication information of a plurality of PRGs and position indication information of downlink resources;

according to the position indication information of the downlink resource, receiving PMI information of a plurality of precoding matrixes corresponding to the plurality of PRGs, which is sent by the network side equipment, through the downlink resource;

and precoding uplink signals on the plurality of PRGs according to the corresponding PMI information, and transmitting the precoded signals to the network side equipment.

In a third aspect, an embodiment of the present invention provides a network side device, including:

a first sending module, configured to send first downlink control information to a user equipment, where the first downlink control information includes indication information of multiple PRGs allocated to the user equipment and location indication information of downlink resources;

a second sending module, configured to send, to the user equipment, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs through the downlink resource.

In a fourth aspect, an embodiment of the present invention provides a user terminal, including:

a first receiving module, configured to receive first downlink control information sent by a network side device, where the first downlink control information includes indication information of multiple PRGs and location indication information of downlink resources;

a second receiving module, configured to receive, according to the location indication information of the downlink resource, PMI information of multiple precoding matrices corresponding to the multiple PRGs and sent by the network side device through the downlink resource;

and the precoding module is used for precoding the uplink signals on the plurality of PRGs according to the corresponding PMI information respectively and sending the precoded signals to the network side equipment.

In a fifth aspect, an embodiment of the present invention provides a system for transmitting PMI information, including a network side device and a user terminal, where the network side device and the user terminal are provided by the embodiment of the present invention.

In this way, in the embodiment of the present invention, first downlink control information is sent to a user equipment, where the first downlink control information includes indication information of a plurality of PRGs allocated to the user equipment, and location indication information of downlink resources; and sending PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal through the downlink resource. Due to the fact that the PMI information of the precoding matrixes is sent to the user terminal aiming at the PRGs, the user terminal can use the corresponding precoding matrixes on different PRGs, and therefore precoding performance and transmission performance of a communication system are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a structural diagram of a PMI information transmission system to which an embodiment of the present invention is applicable;

fig. 2 is a flowchart of a method for sending PMI information according to an embodiment of the present invention;

fig. 3 is a flowchart of another method for sending PMI information according to an embodiment of the present invention;

fig. 4 is a flowchart of a further method for sending PMI information according to an embodiment of the present invention;

fig. 5 is a flowchart of a method for receiving PMI information according to an embodiment of the present invention;

fig. 6 is a flowchart of another PMI information receiving method according to an embodiment of the present invention;

fig. 7 is a flowchart of another PMI information receiving method according to an embodiment of the present invention;

fig. 8 is a structural diagram of a network side device according to an embodiment of the present invention;

fig. 9 is a block diagram of another network-side device provided in the embodiment of the present invention;

fig. 10 is a block diagram of another network-side device according to an embodiment of the present invention;

fig. 11 is a structural diagram of another network-side device according to an embodiment of the present invention;

fig. 12 is a structural diagram of a user equipment according to an embodiment of the present invention;

fig. 13 is a block diagram of another ue according to an embodiment of the present invention;

fig. 14 is a block diagram of another user terminal according to an embodiment of the present invention;

fig. 15 is a block diagram of still another network-side device according to an embodiment of the present invention;

fig. 16 is a block diagram of another user terminal according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a structural diagram of a PMI information transmission system applicable to the embodiment of the present invention, and as shown in fig. 1, includes a user terminal 11 and a network side device 12, where the user terminal 11 may be a ue (user equipment), for example: the terminal side Device may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that the specific type of the user terminal 11 is not limited in the embodiments of the present invention. The ue 11 may establish communication with the network-side device 12, where the network in the figure may indicate that the ue 11 wirelessly establishes communication with the network-side device 12, and the network-side device 12 may be a Transmission Reception Point (TRP) or a base station, and the base station may be a macro station, such as an LTE eNB, a 5G NR NB, or the like. Or the network side device 12 may be an Access Point (AP).

It should be noted that, in the embodiment of the present invention, the specific type of the network-side device 12 is not limited, and the specific functions of the user terminal 11 and the network-side device 12 will be described in detail through a plurality of embodiments below.

Referring to fig. 2, fig. 2 is a flowchart of a method for sending PMI information according to an embodiment of the present invention, as shown in fig. 2, including the following steps:

step 201, sending the first downlink control information to the user terminal.

Wherein the first downlink control information includes indication information of a plurality of PRGs allocated to the user terminal and location indication information of downlink resources.

In this embodiment of the present invention, a network side device may allocate a plurality of PRGs to a user equipment, and when allocating a plurality of PRGs, may allocate a corresponding precoding matrix to each PRG, for example: and respectively selecting the optimal precoding matrix of each PRG from the precoding matrix codebook. For example, taking a PRG as an example, the network side device calculates the performance of each precoding matrix in the precoding matrix codebook corresponding to the channel estimation of the PRG, and selects the precoding matrix with the best performance as the precoding matrix of the PRG, and other PRGs may also select the precoding matrix by this way, which is not described herein again.

In addition, the indication information of the plurality of PRGs may include: the number of PRGs allocated to the user terminal, and location information of each PRG. Accordingly, the user terminal determines the position of each PRG through the indication information, so as to transmit the uplink signal on the PRG.

The downlink resource may be a downlink control resource that can be used by the network side device, for example: control Channel Element (CCE) resources; or the downlink resource may be a downlink shared resource that can be used by the network side device, for example: physical Downlink Shared Channel (PDSCH) resources. The location indication information of the downlink resource may be used to indicate a location of the downlink resource, or may be used to indicate a location and a sequence number of the downlink resource within a specific downlink resource range, or may be used to indicate that the downlink resource is a currently scheduled downlink resource, and the like, which is not limited in this embodiment of the present invention. In addition, the first downlink control information may be DCI format.

Step 202, sending PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal through downlink resources.

The multiple precoding matrices corresponding to the multiple PRGs may be precoding matrices respectively configured for each PRG after the network side device allocates the multiple PRGs to the user equipment, for example: and respectively selecting the optimal precoding matrix of each PRG from the precoding matrix codebook.

Accordingly, after receiving the location indication information of the downlink resource, the ue may determine the downlink resource, and then receive the PMI information on the downlink resource, so as to obtain PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs. And then, the user terminal determines the precoding matrix of each PRG according to the PMI information, and when precoding is carried out on a plurality of PRGs, the precoding matrix corresponding to each PRG is adopted for precoding, so that the performance of the communication system is improved.

In addition, the embodiment of the present invention can be applied to a 5G uplink Multiple-input Multiple-Output (MIMO) System, and can also be applied to a Global System for mobile Communication (GSM) and a multi-carrier Code Division Multiple Access (CDMA) technology, where Multiple precoding matrices are required to indicate a scenario for MIMO operation in an uplink, and can achieve the effects of reducing the load of a control channel and optimizing the performance of the control channel.

In the embodiment of the invention, first downlink control information is sent to a user terminal, wherein the first downlink control information comprises indication information of a plurality of PRGs (physical resource identifiers) distributed to the user terminal and position indication information of downlink resources; and sending PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal through the downlink resource. Because the PMI information of a plurality of precoding matrixes is sent to the user terminal aiming at a plurality of PRGs, the user terminal can use the corresponding precoding matrixes on different PRGs, thereby improving the precoding performance and the transmission performance of a communication system.

Referring to fig. 3, fig. 3 is a flowchart of another method for sending PMI information according to an embodiment of the present invention, where a downlink resource includes a CCE resource, and second downlink control information is sent through the CCE resource, where the second downlink control information includes PMI information of multiple precoding matrices corresponding to multiple PRGs. As shown in fig. 3, the above method includes the steps of:

step 301, sending the first downlink control information to the user terminal.

Wherein the first downlink control information includes indication information of a plurality of PRGs allocated to the user terminal and location indication information of downlink resources, wherein the downlink resources include CCE resources.

The indication information of the plurality of PRGs may include the number of PRGs allocated to the ue and location information of each PRG. And the user terminal determines the position of each PRG through the indication information so as to transmit the uplink signal on the PRGs.

Optionally, the first downlink control information includes a Precoding information and number of layers (Precoding information and number of layers) field, where the Precoding information field includes location indication information of the downlink resource.

In this embodiment, the position indication information of the downlink resource is sent in the precoding information field of the first downlink control information, so that the format of the downlink control information does not need to be modified when the position indication information of the downlink resource is transmitted, thereby reducing the complexity of the communication system. The contents of the first downlink control information are shown in table 1.

TABLE 1

When the user terminal receives the first downlink control information, firstly checking a resource block allocation domain, and when determining that only one PRG is allocated to the user terminal according to the resource block allocation domain, acquiring PMI information through a precoding information domain, wherein no downlink resource exists; and when a plurality of PRGs of the user terminal are determined to be allocated according to the resource block allocation domain, acquiring the position indication information of the downlink resource through the pre-coding information domain. Of course, in the embodiment of the present invention, it is not limited to include the location indication information of the downlink resource in the precoding information field, and the location indication information of the downlink resource may be included in another field of the first control information, or a new field may be added to the first control information to transmit the location indication information of the downlink resource.

It should be noted that this embodiment can also be applied to the embodiment shown in fig. 1, and the same advantageous effects can be achieved.

Optionally, before sending the first downlink control information to the user terminal, the method further includes:

allocating a plurality of PRGs to the user terminal, and selecting a plurality of precoding matrices for the plurality of PRGs.

For example: the network side device may allocate a plurality of PRGs to the user equipment, and when allocating a plurality of PRGs, may allocate a corresponding precoding matrix to each PRG, for example: the optimal precoding matrix of each PRG is selected from the precoding matrix codebook, so that the transmission performance of the user terminal can be optimized. For example, taking a PRG as an example, the network side device calculates the performance of each precoding matrix in the precoding matrix codebook corresponding to the channel estimation of the PRG, and selects the precoding matrix with the best performance as the precoding matrix of the PRG, and other PRGs may also select the precoding matrix by this way, which is not described herein again.

Step 302, transmitting the second downlink control information through the CCE resource.

Wherein the second downlink control information includes PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs.

The second downlink control information may be DCI format.

In this embodiment, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs is transmitted to the user terminal through the second downlink control information. The user terminal can acquire the position indication information of the CCE resource through the first downlink control information, blind detection on the second downlink control information is not needed, and power consumption of the user terminal can be reduced. Since the PMI information of the plurality of precoding matrices is transmitted through the second downlink control information, the user terminal does not need to perform Cyclic Redundancy Check (CRC) Check, and power consumption of the user terminal can be further reduced.

Preferentially, the second downlink control information may carry an error correction coding polarization code, so that the user terminal uses the error correction coding polarization code to correct the PMI information, thereby improving the accuracy of PMI information transmission.

Specifically, after receiving the position indication information, the user terminal determines CCE resources according to the position indication information, and receives second downlink control information in the CCE resources to obtain PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs. The user terminal determines the precoding matrix of each PRG according to the PMI information, so that when precoding is carried out on a plurality of PRGs, the precoding matrix corresponding to each PRG is adopted for precoding, and the performance of a communication system is improved.

Optionally, the indication information of the plurality of PRGs in the first downlink control information is sorted according to the frequency of the PRGs;

and sequencing the PMI information of the precoding matrixes corresponding to the plurality of PRGs according to the frequency of the PRGs.

The frequency of the PRG may be sorted in an order from a low frequency to a high frequency, but the embodiment of the present invention is not limited thereto, and for example, the frequency may be sorted in an order from a high frequency to a low frequency. Because the indication information of the plurality of PRGs and the PMI information of the precoding matrixes corresponding to the plurality of PRGs are all sorted according to the frequency of the PRGs, the user terminal receives the indication information of the plurality of PRGs and the PMI information, can determine the PRGs corresponding to the PMIs, does not need to indicate the PRGs corresponding to the PMIs through additional indication information, and accordingly saves transmission overhead. Of course, in the embodiment of the present invention, the PRG corresponding to each PMI may also be indicated by adding additional information, for example: the identity of the PRG is added to the PMI information.

Optionally, before the step of sending the second downlink control information by using the physical downlink shared channel element, the method further includes:

and sending Radio Resource Control (RRC) signaling to the user terminal, wherein the RRC signaling comprises configuration information of a plurality of CCE resources.

Each CCE resource may include one or more CCEs, and the first downlink control information includes location indication information of the CCE resource, where the CCE resource indicated by the location indication information may be one or more CCE resources of the multiple CCE resources. The CCE resource location indication information in the first downlink control information may indicate a location of the CCE resource or a sequence number in the plurality of CCE resources.

Optionally, the location indication information of the downlink resource includes a sequence number of the CCE resource;

the configuration information of the plurality of CCE resources comprises the serial number of each CCE resource, the position of the initial CCE in each CCE resource, and the number of CCEs contained in each CCE resource.

In the embodiment, a plurality of CCE resources can be configured for the user terminal in advance, and when the PMI information is transmitted, only the serial number of the CCE resource for transmitting the PMI information needs to be indicated, so that the transmission overhead can be saved. In addition, since the indication information of the PRG and the PMI information are transmitted through two pieces of downlink control information, the overall load of the control channel can be reduced to improve the overall performance of the communication system.

The configuration information of the plurality of CCE resources is shown in table 2.

TABLE 2

In the embodiment, a user terminal firstly blindly detects a first downlink control to obtain control information of uplink transmission, if a plurality of PRGs are allocated to the user terminal, the user terminal extracts a precoding information field from the first downlink control, determines CCE resources used by second downlink control information according to position indication information in the precoding information field, further obtains PMI information by detecting the second downlink control information, determines a plurality of precoding matrices allocated to a network side device according to the PMI information, performs optimal precoding of uplink signals on the allocated PRGs by using the precoding matrices, and transmits the precoded signals to the network side device through one or more transmitting antennas.

Referring to fig. 4, fig. 4 is a flowchart of another method for sending PMI information according to an embodiment of the present invention, where the downlink resource includes a PDSCH resource, and the PMI information is sent through a PDSCH corresponding to the PDSCH resource. As shown in fig. 4, the method comprises the following steps:

step 401, sending the first downlink control information to the user terminal.

Wherein the first downlink control information includes indication information of a plurality of PRGs allocated to the user terminal and location indication information of downlink resources, wherein the downlink resources include PDSCH resources.

In this embodiment, the indication information of the plurality of PRGs may include the number of PRGs allocated to the user terminal and location information of each PRG. And the user terminal determines the position of each PRG through the indication information so as to transmit the uplink signal on the PRG.

Optionally, the first downlink control information includes a Precoding information (Precoding information) field, and the Precoding information field includes location indication information of the downlink resource.

In this embodiment, the position indication information is transmitted in the precoding information field of the first downlink control information, and the format of the downlink control information does not need to be modified, thereby reducing the complexity of the communication system.

Step 402 is to transmit PMI information of a plurality of precoding matrices corresponding to a plurality of PRGs via a PDSCH corresponding to a PDSCH resource.

In this embodiment, since the PDSCH resource may be indicated by the precoding information field in the first downlink control information, scheduling by using separate downlink control information is not required, and CRC check is not required for the multiple PMIs transmitted by the PUSCH signal, which may save power consumption of the user terminal. Of course, in the embodiment of the present invention, an error correction coding Low Density Check Code (LDPC) may be added to the PDSCH signal, so that the user terminal may use the LDPC to correct the error of the precoding matrix indicator, so as to improve the accuracy of PMI information transmission.

Correspondingly, after receiving the position indication information of the PDSCH resource, the user terminal determines the PDSCH resource according to the position indication information, and receives PMI information of a plurality of precoding matrixes corresponding to a plurality of PRGs in the PDSCH resource. The user terminal determines the precoding matrix of each PRG according to the PMI information, so that when precoding is carried out on a plurality of PRGs, the precoding matrix corresponding to each PRG is adopted for precoding, and the performance of a communication system is improved.

The frequency of the PRG may be sorted in an order from a low frequency to a high frequency, but the embodiment of the present invention is not limited thereto, and for example, the frequency may be sorted in an order from a high frequency to a low frequency. Because the indication information of the plurality of PRGs and the PMI information of the precoding matrices corresponding to the plurality of PRGs are all sorted according to the frequency of the PRGs, the user terminal receives the indication information of the plurality of PRGs and the PMI information, can determine the PRGs corresponding to the PMIs, does not need to indicate the PRGs corresponding to the PMIs through additional indication information, and can save transmission overhead. Of course, in the embodiment of the present invention, the PRG corresponding to each PMI may also be indicated by adding additional information, for example: the identity of the PRG is added to the PMI information.

Optionally, before sending PMI information of a plurality of precoding matrices corresponding to a plurality of PRGs through a PDSCH corresponding to PDSCH resources, the method further includes:

and sending RRC signaling to the user terminal, wherein the RRC signaling comprises configuration information of a plurality of PDSCH resources.

Each PDSCH resource may include one or more physical resource blocks, and the PDSCH resource corresponding to the location indication information in the first downlink control information may be one or more PDSCH resources in the multiple PDSCH resources. In addition, the location indication information of the PDSCH resources in the first downlink control information may be a location indicating the PDSCH resources.

Optionally, the location indication information of the downlink resource includes a sequence number of the PDSCH resource;

the configuration information of the PDSCH resources includes the serial numbers of the PDSCH resources, the positions of Physical Resource Blocks (PRBs) in the PDSCH resources, and the number of PRBs included in the PDSCH resources.

In this embodiment, a plurality of PDSCH resources may be configured in advance for the ue, and when transmitting PMI information, only the sequence number of the PDSCH resource for transmitting PMI information needs to be indicated, so as to save transmission overhead. In addition, since the instruction information of the PRG and the PMI information are transmitted by two pieces of downlink control information, the overall load of the control channel can be reduced, and the overall performance of the communication system can be improved.

The configuration information of the PDSCH resources is shown in table 3.

TABLE 3

Because the configuration information of the PDSCH resources includes the position of the starting PRB and the number of PRBs contained in each PDSCH resource, the user terminal can accurately determine the PDSCH resources for transmitting PMI information.

Optionally, if the current subframe has downlink PDSCH scheduling, the downlink resource is a resource corresponding to the downlink PDSCH, and the location indication information of the downlink resource is used to indicate that the PMI information is sent through the downlink PDSCH.

In this embodiment, if the current subframe is the downlink PDSCH scheduling already existing in the ue, the PMI information may be directly transmitted through the resource corresponding to the downlink PDSCH. For example: as shown in table 3, PMI information may be transmitted together with downlink data, and the position indication information of the downlink resource in the first downlink control information indicates that PDSCH resource 0 is used.

In this embodiment, since the scheduled PDSCH can be used to transmit PMI information, the effect of saving transmission resources can be achieved.

In addition, in the implementation of the present invention, if the network side device allocates one PRG to the user equipment, third downlink control information may be sent to the user equipment, where the third downlink control information includes indication information of the one PRG and a PMI of a precoding matrix corresponding to the one PRG.

Referring to fig. 5, fig. 5 is a flowchart of a method for receiving PMI information according to an embodiment of the present invention, as shown in fig. 5, including the following steps:

step 501, receiving first downlink control information sent by a network side device.

The first downlink control information includes indication information of a plurality of PRGs and location indication information of downlink resources. The first downlink control information may refer to corresponding descriptions of the embodiments shown in fig. 2 to fig. 4, which are not described herein again.

Step 502, receiving PMI information of a plurality of precoding matrices corresponding to a plurality of PRGs, which is sent by a network side device, through a downlink resource according to the position indication information of the downlink resource.

For the downlink resource and the location indication information thereof, reference may be made to corresponding descriptions of the embodiments shown in fig. 2 to fig. 4, which are not described herein again.

Through step 502, the ue may receive PMI information of multiple precoding matrices corresponding to multiple PRGs sent by the network side device to determine the precoding matrices of the multiple PRGs, where the precoding matrices of the multiple PRGs may refer to corresponding descriptions of the embodiments shown in fig. 2 to fig. 4, which is not described herein again and may achieve the same beneficial effects.

Step 503, precoding the uplink signals on the plurality of PRGs according to the corresponding PMI information, and transmitting the precoded signals to the network side device.

Through the above steps, the ue receives the location indication information, determines the downlink resource according to the location indication information, and further obtains PMI information of a plurality of precoding matrices corresponding to a plurality of PRGs in the downlink resource. And then, the user terminal determines the precoding matrix corresponding to each PRG according to the PMI information, and when precoding is carried out on a plurality of PRGs, the precoding matrix corresponding to each PRG is adopted for precoding, so that the performance of the communication system is improved.

In the embodiment of the invention, first downlink control information sent by network side equipment is received, wherein the first downlink control information comprises indication information of a plurality of PRGs and position indication information of downlink resources; according to the position indication information of the downlink resource, receiving PMI information of a plurality of precoding matrixes corresponding to the plurality of PRGs, which is sent by the network side equipment, through the downlink resource; and precoding uplink signals on the plurality of PRGs according to the corresponding PMI information, and transmitting the precoded signals to the network side equipment. Because the user terminal uses the precoding matrix corresponding to each PRG to precode the uplink signal on a plurality of PRGs, and sends the precoded signal to the network side equipment, the precoding performance and the transmission performance of the communication system can be improved.

It should be noted that, this embodiment is used as an implementation of the user terminal corresponding to the embodiment shown in fig. 2, and specific implementation thereof may refer to the description related to the embodiment shown in fig. 2 to achieve the same beneficial effects, and details are not repeated here to avoid repeated description.

Referring to fig. 6, fig. 6 is a flowchart of another method for receiving PMI information according to an embodiment of the present invention, where a downlink resource includes a CCE resource, and second downlink control information sent by the network side device is received through the CCE resource according to location indication information of the CCE resource, where the second downlink control information includes the PMI information. As shown in fig. 6, the above method includes the steps of:

step 601, receiving first downlink control information sent by a network side device.

Wherein the first downlink control information includes indication information of the plurality of PRGs and location indication information of the CCE resource. The first downlink control information may refer to corresponding descriptions of the embodiments shown in fig. 2 to fig. 4, which are not described herein again.

Step 602, receiving second downlink control information sent by the network side device through the CCE resource according to the location indication information of the CCE resource.

In this step, the CCE resource may be determined by the location indication information, so that the second downlink control information sent by the network side device is received by the CCE resource to acquire PMI information. For specific implementation processes and beneficial effects of this embodiment, reference may be made to corresponding descriptions of the embodiment shown in fig. 3, which are not described herein again.

Step 603, precoding the uplink signals on the plurality of PRGs according to the corresponding PMI information, and transmitting the precoded signals to the network side device.

Optionally, the first downlink control information includes a precoding information field, and the precoding information field includes location indication information of the downlink resource.

The first downlink control information may refer to corresponding descriptions of the embodiment shown in fig. 3, which are not described herein again and may achieve the same beneficial effects.

Optionally, before the step of receiving, by using the CCE resource, second downlink control information sent by the network side device according to the location indication information of the downlink resource, the method further includes:

and receiving RRC signaling sent by the network side equipment, wherein the RRC signaling comprises configuration information of a plurality of CCE resources.

For configuration information of multiple CCE resources and RRC signaling, reference may be made to corresponding descriptions in the embodiment shown in fig. 3, which are not described herein again, and the same beneficial effects may be achieved.

The sequence number of the CCE resource and the configuration information of the multiple CCE resources may refer to corresponding descriptions in the embodiment shown in fig. 3, which are not described herein again and may achieve the same beneficial effects.

Accordingly, based on the configuration information of the plurality of CCE resources, the location of the starting CCE of the CCE resource and the number of CCEs included in the CCE resource may be determined according to the sequence number of the CCE resource included in the first downlink control information, and the second downlink control information transmitted by the network side device may be received through the CCE resource.

The foregoing sorting manner may refer to the corresponding description of the embodiment shown in fig. 3, which is not described herein again, and the same beneficial effects may be achieved.

It should be noted that, this embodiment is used as an implementation of the user terminal corresponding to the embodiment shown in fig. 3, and specific implementation thereof may refer to the description related to the embodiment shown in fig. 3 to achieve the same beneficial effects, and details are not repeated here to avoid repeated description.

Referring to fig. 7, fig. 7 is a flowchart of another PMI information receiving method according to an embodiment of the present invention, where a downlink resource includes a PDSCH resource, and PMI information sent by the network side device is received through a PDSCH corresponding to the PDSCH resource according to location indication information of the PDSCH resource. As shown in fig. 7, the method comprises the following steps:

step 701, receiving first downlink control information sent by a network side device.

The first downlink control information includes indication information of a plurality of PRGs and location indication information of PDSCH resources. The first downlink control information may refer to corresponding descriptions of the embodiments shown in fig. 2 to fig. 4, which are not described herein again.

Step 702, receiving PMI information of a plurality of precoding matrices corresponding to a plurality of PRGs, which is transmitted by the network side device, through a PDSCH corresponding to the PDSCH resources according to the position indication information of the PDSCH resources.

In this step, the PDSCH resources may be determined according to the location indication information, so that the PMI information sent by the network side device may be received according to the PDSCH resources. For specific implementation processes and beneficial effects of this embodiment, reference may be made to corresponding descriptions of the embodiment shown in fig. 4, which are not described herein again.

And 703, precoding the uplink signals on the plurality of PRGs according to the corresponding PMI information, and sending the precoded signals to the network side equipment.

Optionally, before receiving, by the PDSCH corresponding to the PDSCH resource, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs sent by the network side device according to the location indication information of the downlink resource, the method further includes:

and receiving RRC signaling sent by the network side equipment, wherein the RRC signaling comprises configuration information of a plurality of PDSCH resources.

For configuration information and RRC signaling of multiple PDSCH resources, refer to the corresponding description of the embodiment shown in fig. 4, which is not described herein again, and the same beneficial effects can be achieved.

the configuration information of the multiple PDSCH resources includes the sequence number of each PDSCH resource, the position of the starting physical resource block PRB in each PDSCH resource, and the number of PRBs included in each PDSCH resource.

Accordingly, based on the configuration information of the PDSCH resources, the position of the starting PRB of the PDSCH resource and the number of PRBs included in the PDSCH resource may be determined according to the sequence number of the PDSCH resource included in the first downlink control information, and the PMI information of the precoding matrices corresponding to the PRGs, which is transmitted by the network side device, may be received through the PDSCH resource.

The sequence numbers of the PDSCH resources and the configuration information of the multiple PDSCH resources may refer to the corresponding description of the embodiment shown in fig. 4, which is not described herein again, and the same beneficial effects may be achieved.

Optionally, if the current subframe has downlink PDSCH scheduling, the downlink resource is a resource corresponding to the downlink PDSCH, and the location indication information of the downlink resource is used to indicate that the PMI information is sent through the downlink PDSCH; accordingly, the PMI information transmitted by the network side device may be received through the downlink PDSCH.

The location indication information of the downlink resource may refer to the corresponding description of the embodiment shown in fig. 4, which is not described herein again, and the same beneficial effects may be achieved.

It should be noted that, this embodiment is used as an implementation of the user terminal corresponding to the embodiment shown in fig. 4, and specific implementation thereof may refer to the description related to the embodiment shown in fig. 4 to achieve the same beneficial effects, and is not described herein again to avoid repeated description.

Referring to fig. 8, fig. 8 is a structural diagram of a network side device according to an embodiment of the present invention, which can implement details of the sending method of PMI information in the embodiments shown in fig. 2 to fig. 4, and achieve the same effect. As shown in fig. 8, the network-side device 800 includes: a first sending module 801 and a second sending module 802, wherein:

a first sending module 801, configured to send first downlink control information to a user equipment, where the first downlink control information includes indication information of multiple PRGs allocated to the user equipment and location indication information of downlink resources;

a second sending module 802, configured to send, to the ue, PMI information of multiple precoding matrices corresponding to the multiple PRGs through the downlink resource.

Optionally, the downlink resource includes a CCE resource;

the second sending module 802 is specifically configured to send second downlink control information through the CCE resource, where the second downlink control information includes the PMI information.

Optionally, as shown in fig. 9, the network-side device 800 further includes:

a third sending module 803, configured to send an RRC signaling to the user equipment, where the RRC signaling includes configuration information of a plurality of CCE resources.

Optionally, the downlink resource includes a PDSCH resource;

the second sending module 802 is specifically configured to send PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs through a PDSCH corresponding to the PDSCH resources.

Optionally, as shown in fig. 10, the network-side device 800 further includes:

a fourth sending module 804, configured to send an RRC signaling to the user equipment, where the RRC signaling includes configuration information of multiple PDSCH resources.

Accordingly, the second transmitting module 802 is specifically configured to transmit PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal through the downlink PDSCH.

Optionally, as shown in fig. 11, the network-side device 800 further includes:

an allocating module 805, configured to allocate multiple PRGs to the user terminal, and select multiple precoding matrices for the multiple PRGs.

It should be noted that, in this embodiment, the network-side device 800 may be a network-side device according to any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 800 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Referring to fig. 12, fig. 12 is a structural diagram of a user equipment according to an embodiment of the present invention, which can implement details of the PMI information receiving method in the embodiments shown in fig. 5 to fig. 7, and achieve the same effect. As shown in fig. 12, the user terminal 1200 includes: a first receiving module 1201, a second receiving module 1202 and a pre-coding module 1203, wherein:

a first receiving module 1201, configured to receive first downlink control information sent by a network side device, where the first downlink control information includes indication information of multiple PRGs and location indication information of downlink resources;

a second receiving module 1202, configured to receive, according to the location indication information of the downlink resource, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs, which is sent by the network side device, through the downlink resource;

a precoding module 1203, configured to precode, on the multiple PRGs, the uplink signals according to the corresponding PMI information, and send the precoded signals to the network side device.

Optionally, the downlink resource includes a CCE resource;

the second receiving module 1202 is specifically configured to receive, according to the location indication information of the CCE resource, second downlink control information sent by the network side device through the CCE resource, where the second downlink control information includes the PMI information.

Optionally, as shown in fig. 13, the user terminal 1200 further includes:

a third receiving module 1204, configured to receive an RRC signaling sent by the network side device, where the RRC signaling includes configuration information of multiple CCE resources.

Accordingly, the second receiving module 1202 is specifically configured to, based on the configuration information of the multiple CCE resources, determine, according to the sequence number of the CCE resource included in the first downlink control information, a position of a starting CCE of the CCE resource and a number of CCEs included in the CCE resource, and further receive, through the CCE resource, second downlink control information sent by the network side device.

Optionally, the downlink resource includes a PDSCH resource;

the second receiving module 1202 is specifically configured to receive, according to the PDSCH resource of the downlink resource, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs, which is sent by the network side device, through the PDSCH corresponding to the PDSCH resource.

Optionally, as shown in fig. 14, the user terminal 1200 further includes:

a fourth receiving module 1205, configured to receive an RRC signaling sent by the network side device, where the RRC signaling includes configuration information of multiple PDSCH resources.

Correspondingly, the second receiving module 1202 is specifically configured to, based on the configuration information of the multiple PDSCH resources, determine, according to the sequence numbers of the PDSCH resources included in the first downlink control information, the positions of starting PRBs of the PDSCH resources and the number of PRBs included in the PDSCH resources, and further receive, through the PDSCH resources, PMI information of multiple precoding matrices corresponding to the multiple PRGs, which is sent by the network side device.

Accordingly, the second receiving module 1202 is specifically configured to receive the PMI information sent by the network side device through the downlink PDSCH.

It should be noted that, in this embodiment, the user terminal 1200 may be a user terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the user terminal in the method embodiment of the present invention may be implemented by the user terminal 1200 in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Referring to fig. 15, fig. 15 is a structural diagram of a network side device to which the embodiment of the present invention is applied, which can implement details of the sending method of PMI information in the embodiments shown in fig. 2 to fig. 4, and achieve the same effect. As shown in fig. 15, the network-side device 1500 includes: a processor 1501, a transceiver 1502, a memory 1503, a user interface 1504, and a bus interface, wherein:

the processor 1501, which is configured to read the program in the memory 1503, executes the following processes:

Among other things, the transceiver 1502 is configured to receive and transmit data under the control of the processor 1501.

In fig. 15, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1501, and various circuits, represented by memory 1503, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1502 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 1504 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1501 is responsible for managing a bus architecture and general processing, and the memory 1503 may store data used by the processor 1501 in performing operations.

Optionally, the downlink resource includes a CCE resource;

the sending, by the processor 1501, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal via the downlink resource includes:

and sending second downlink control information through the CCE resource, wherein the second downlink control information comprises the PMI information.

Optionally, before sending the first downlink control information to the user terminal, the processor 1501 is further configured to:

Optionally, the downlink resource includes a PDSCH resource;

and transmitting PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs via a PDSCH corresponding to the PDSCH resource.

Accordingly, the sending, by the processor 1501, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal via the downlink resource includes:

and transmitting PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal via the downlink PDSCH.

It should be noted that, in this embodiment, the network-side device 1500 may be a network-side device in any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 1500 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Referring to fig. 16, fig. 16 is a structural diagram of a user terminal applied in the embodiment of the present invention, which can implement details of the PMI information receiving method in the embodiments shown in fig. 5 to fig. 7, and achieve the same effect. As shown in fig. 16, the user terminal 1600 includes: at least one processor 1601, memory 1602, at least one network interface 1604, and a user interface 1603. The various components in terminal 1600 are coupled together by a bus system 1605. It is understood that the bus system 1605 is used to enable connected communication between these components. The bus system 1605 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration the various buses are labeled in figure 16 as bus system 1605.

The user interface 1603 may include, among other things, a display, a keyboard or a pointing device (e.g., a mouse, track ball, touch pad or touch screen, etc.).

It is to be understood that the memory 1602 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double data rate Synchronous Dynamic random access memory (ddr DRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1602 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 1602 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 16021 and application programs 16022.

The operating system 16021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application 16022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. Programs that implement methods in accordance with embodiments of the present invention may be included within application 16022.

In the embodiment of the present invention, the processor 1601 is configured to, by calling a program or an instruction stored in the memory 1602, specifically, a program or an instruction stored in the application 16022:

The method disclosed by the above-mentioned embodiments of the present invention may be applied to the processor 1601 or implemented by the processor 1601. The processor 1601 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the method may be performed by hardware integrated logic circuits or instructions in software form in the processor 1601. The Processor 1601 may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1602, and the processor 1601 reads information in the memory 1602, and performs the steps of the method in combination with hardware thereof.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

Optionally, the downlink resource includes a CCE resource;

the receiving, by the processor 1601, according to the location indication information of the downlink resource, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs, which is sent by the network side device, through the downlink resource includes:

and receiving second downlink control information sent by the network side equipment through the CCE resource according to the position indication information of the CCE resource, wherein the second downlink control information comprises the PMI information.

Optionally, before the receiving, by using the CCE resource, the second downlink control information sent by the network side device according to the location indication information of the downlink resource, the processor 1601 is further configured to:

Accordingly, the receiving, by the processor 1601, the PMI information of the plurality of precoding matrices corresponding to the plurality of PRGs, sent by the network side device, through the downlink resource according to the position indication information of the downlink resource includes:

based on the configuration information of the plurality of CCE resources, the location of the starting CCE of the CCE resource and the number of CCEs included in the CCE resource may be determined according to the sequence number of the CCE resource included in the first downlink control information, and the second downlink control information transmitted by the network side device may be received through the CCE resource.

Optionally, the downlink resource includes a PDSCH resource;

and receiving PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs, which is sent by the network side equipment, through the PDSCH corresponding to the PDSCH resources according to the position indication information of the PDSCH.

Optionally, before the receiving, by the PDSCH corresponding to the PDSCH resource, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs and sent by the network side device according to the location indication information of the downlink resource, the processor 1601 is further configured to:

based on the configuration information of the PDSCH resources, the position of the starting PRB of the PDSCH resource and the number of PRBs included in the PDSCH resource may be determined according to the sequence number of the PDSCH resource included in the first downlink control information, and PMI information of a plurality of precoding matrices corresponding to the PRGs, which is transmitted by the network side device, may be received through the PDSCH resource.

and receiving the PMI information sent by the network side equipment through the downlink PDSCH.

It should be noted that, in this embodiment, the user terminal 1600 may be a user terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the user terminal in the method embodiment of the present invention may be implemented by the user terminal 1600 in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for transmitting Precoding Matrix Indicator (PMI) information, the method comprising:

sending first downlink control information to a user terminal, wherein the first downlink control information comprises indication information of a plurality of Physical Resource Groups (PRG) allocated to the user terminal and position indication information of downlink resources;

and sending PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal through the downlink resource, wherein the plurality of precoding matrices corresponding to the plurality of PRGs are optimal precoding matrices respectively selected for each PRG from a precoding matrix codebook.

2. The method of claim 1, wherein the first downlink control information comprises a precoding information field, the precoding information field comprising location indication information of the downlink resource.

3. The method of claim 1, wherein the downlink resources comprise Control Channel Element (CCE) resources;

the sending, to the user equipment, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs through the downlink resource includes:

4. The method of claim 3, wherein before sending the first downlink control information to the user terminal, further comprising:

5. The method of claim 4, wherein the location indication information of the downlink resources includes sequence numbers of the CCE resources;

6. The method of claim 1, wherein the downlink resources comprise Physical Downlink Shared Channel (PDSCH) resources;

7. The method of claim 6, wherein before sending the first downlink control information to the user terminal, further comprising:

8. The method of claim 7, wherein the location indication information of the downlink resources includes sequence numbers of the PDSCH resources;

9. The method of claim 6, wherein if a downlink PDSCH is scheduled on a current subframe, the downlink resource is a resource corresponding to the downlink PDSCH, and the location indication information of the downlink resource is used to indicate that the PMI information is sent via the downlink PDSCH;

10. The method of claim 1, wherein the indication information of the plurality of PRGs in the first downlink control information is ordered according to a frequency of PRGs;

11. The method of claim 1, wherein before sending the first downlink control information to the user terminal, further comprising:

12. A method for receiving PMI information, comprising:

according to the position indication information of the downlink resource, receiving, by the network side device, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs, which is sent by the network side device, through the downlink resource, wherein the plurality of precoding matrices corresponding to the plurality of PRGs are optimal precoding matrices respectively selected for each PRG from a precoding matrix codebook;

13. The method of claim 12, wherein the first downlink control information comprises a precoding information field, the precoding information field comprising location indication information of the downlink resource.

14. The method of claim 12, wherein the downlink resources comprise CCE resources;

the receiving, by the network side device, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs, sent by the downlink resource according to the position indication information of the downlink resource, includes:

15. The method of claim 14, wherein before the step of receiving, through the CCE resource, second downlink control information transmitted by the network side device according to the location indication information of the CCE resource, the method further comprises:

16. The method of claim 15, wherein the location indication information of the downlink resources includes sequence numbers of the CCE resources;

17. The method of claim 12, wherein the downlink resources comprise PDSCH resources;

and receiving PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs, which is sent by the network side equipment, through a PDSCH corresponding to the PDSCH resource according to the position indication information of the PDSCH resource.

18. The method of claim 17, wherein before the receiving, by the PDSCH corresponding to the PDSCH resources, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs transmitted by the network side device according to the location indication information of the downlink resources, the method further comprises:

19. The method of claim 18, wherein the location indication information of the downlink resources includes sequence numbers of the PDSCH resources;

20. The method of claim 12, wherein if a downlink PDSCH is scheduled on a current subframe, the downlink resource is a resource corresponding to the downlink PDSCH, and the location indication information of the downlink resource is used to indicate that the PMI information is sent via the downlink PDSCH;

21. The method of claim 12, wherein the indication information of the plurality of PRGs in the first downlink control information is ordered according to a frequency of PRGs;

22. A network-side device, comprising:

a second sending module, configured to send PMI information of multiple precoding matrices corresponding to the multiple PRGs to the user equipment through the downlink resource, where the multiple precoding matrices corresponding to the multiple PRGs are optimal precoding matrices respectively selected for each PRG from a precoding matrix codebook.

23. The network-side device of claim 22, wherein the first downlink control information comprises a precoding information field, and the precoding information field comprises location indication information of the downlink resource.

24. The network-side device of claim 22, wherein the downlink resources include CCE resources;

the second sending module is specifically configured to send second downlink control information through the CCE resource, where the second downlink control information includes the PMI information.

25. The network-side device of claim 24, wherein the network-side device further comprises:

a third sending module, configured to send an RRC signaling to the user equipment, where the RRC signaling includes configuration information of multiple CCE resources.

26. The network-side device of claim 25, wherein the location indication information of the downlink resource includes a sequence number of the CCE resource;

27. The network-side device of claim 22, wherein the downlink resources include PDSCH resources;

the second transmitting module is specifically configured to transmit PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs through a PDSCH corresponding to the PDSCH resources.

28. The network-side device of claim 27, wherein the network-side device further comprises:

a fourth sending module, configured to send an RRC signaling to the user equipment, where the RRC signaling includes configuration information of multiple PDSCH resources.

29. The network-side device of claim 28, wherein the location indication information of the downlink resources includes sequence numbers of the PDSCH resources;

30. The network-side device of claim 22, wherein if a downlink PDSCH scheduling exists in a current subframe, the downlink resource is a resource corresponding to the downlink PDSCH, and the location indication information of the downlink resource is used to indicate that the PMI information is sent via the downlink PDSCH;

the second transmitting module is specifically configured to transmit PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs to the user terminal through the downlink PDSCH.

31. The network-side device of claim 22, wherein the indication information of the plurality of PRGs in the first downlink control information is sorted according to a frequency of PRGs;

32. The network-side device of claim 22, wherein the network-side device further comprises:

and the allocating module is used for allocating a plurality of PRGs for the user terminal and selecting a plurality of precoding matrixes aiming at the PRGs.

33. A user terminal, comprising:

a second receiving module, configured to receive, according to the position indication information of the downlink resource, PMI information of multiple precoding matrices, which is sent by the network side device and corresponds to the multiple PRGs, through the downlink resource, where the multiple precoding matrices corresponding to the multiple PRGs are optimal precoding matrices that are respectively selected for each PRG from a precoding matrix codebook;

34. The user terminal of claim 33, wherein the first downlink control information comprises a precoding information field, the precoding information field comprising location indication information of the downlink resource.

35. The user terminal of claim 33, wherein the downlink resources comprise CCE resources;

the second receiving module is specifically configured to receive, according to the position indication information of the CCE resource, second downlink control information sent by the network side device through the CCE resource, where the second downlink control information includes the PMI information.

36. The user terminal of claim 35, wherein the user terminal further comprises:

a third receiving module, configured to receive an RRC signaling sent by the network side device, where the RRC signaling includes configuration information of multiple CCE resources.

37. The user terminal of claim 36, wherein the location indication information of the downlink resource includes a sequence number of the CCE resource;

38. The user terminal of claim 33, wherein the downlink resources comprise PDSCH resources;

the second receiving module is specifically configured to receive, according to the location indication information of the PDSCH resources, PMI information of a plurality of precoding matrices corresponding to the plurality of PRGs, which is sent by the network side device, through the PDSCH corresponding to the PDSCH resources.

39. The user terminal of claim 38, wherein the user terminal further comprises:

a fourth receiving module, configured to receive an RRC signaling sent by the network side device, where the RRC signaling includes configuration information of multiple PDSCH resources.

40. The user terminal of claim 39, wherein the location indication information of the downlink resources comprises sequence numbers of the PDSCH resources;

41. The ue according to claim 33, wherein if there is downlink PDSCH scheduling in the current subframe, the downlink resource is a resource corresponding to the downlink PDSCH, and the location indication information of the downlink resource is used to indicate that the PMI information is sent through the downlink PDSCH;

the second receiving module is specifically configured to receive, through the downlink PDSCH, the PMI information sent by the network side device.

42. The ue according to claim 33, wherein the indication information of the PRGs in the first downlink control information is sorted according to PRG frequencies;

43. A PMI information transmission system, comprising the network-side device according to any one of claims 22 to 32 and the user terminal according to any one of claims 33 to 42.