WO2016124060A1

WO2016124060A1 - Method, device and system for transmitting sounding reference signal, and storage medium

Info

Publication number: WO2016124060A1
Application number: PCT/CN2016/070083
Authority: WO
Inventors: 王瑜新; 李劲菊; 陈艺戬; 鲁照华; 李儒岳
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-02-03
Filing date: 2016-01-04
Publication date: 2016-08-11
Also published as: CN105991264A; CN105991264B

Abstract

Disclosed in the present invention is a method for transmitting sounding reference signals (SRS). The method includes: a base station sets the configuration information of the SRS, and issues the configuration information of the SRS to a terminal device; the configuration information includes pre-coding enabling indication information used for indicting whether the SRS is pre-coded by the terminal device or not; the pre-coding enabling indication information includes: a downlink transmission mode, a downlink control signaling format, the number of transmission blocks of the terminal device, or joint indication information of the antenna port, a scramble ID and the number of layers. Meanwhile, also disclosed in the present invention are the device and system for implement the method, and the storage medium.

Description

Method, device and system for transmitting measurement reference signal, storage medium

Technical field

The present invention relates to a transmission technology of a Sounding Reference Signal (SRS) in the field of communications, and in particular, to a method, a device and a system for transmitting an SRS, and a storage medium.

Background technique

SRS is a signal used between a terminal device and a base station to measure channel state information (CSI). In the long term evolution system, the UE periodically sends an uplink SRS on the last data symbol of the transmission subframe according to parameters such as bandwidth indicated by the eNB, frequency domain location, sequence cyclic shift, period, and subframe offset. The eNB determines the uplink CSI of the UE according to the received SRS, and performs operations such as frequency domain selection scheduling, closed loop power control, and the like according to the obtained CSI.

In the existing research of LTE-A Release 10 (LTE-A Release 10), it is proposed that in uplink communication, non-precoded SRS should be used, namely: antenna-specific SRS, and PUSCH for demodulation. The reference signal (De Modulation Reference Signal, DMRS for short) is precoded. The base station can estimate the original CSI of the uplink by receiving the non-precoded SRS, and the pre-coded DMRS cannot enable the base station to estimate the original CSI of the uplink. At this time, when the UE transmits the non-precoded SRS by using multiple antennas, the SRS resources required by each UE are increased, which results in a decrease in the number of UEs that can be simultaneously multiplexed in the system. The UE may send the SRS by using the high-level signaling (also referred to as triggered by the trigger type 0) or the downlink control information (also referred to as triggering by the trigger type 1), and the periodic SRS is triggered based on the high-level signaling, and is based on the downlink. The control information triggers a non-periodic SRS. Although the method of aperiodic transmission of SRS is added in LTE-A Release 10, the utilization of SRS resources is improved to some extent, and the flexibility of resource scheduling is improved.

However, in the future LTE-A Release 13 (LTE-A Release 13) study, a full-dimension MIMO (Full Dimension-MIMO, FD-MIMO for short) or MIMO (Massive-MIMO) system with a large number of antennas is used to reduce the downlink. The resource overhead of the pilot and the feedback amount of the UE are reduced, and the channel reciprocity is often used to obtain the downlink CSI by measuring the SRS. Therefore, the multiplexing capacity of the SRS and the channel estimation measurement accuracy are higher. How to further save SRS resources, improve SRS resource utilization, improve channel estimation performance of SRS, and reduce interference of SRS to neighboring areas to achieve more effective support for FD-MIMO/Massive-MIMO system applications is an urgent problem to be solved. . In view of the above problems in the related art, there is currently no effective solution.

Summary of the invention

In order to solve the existing technical problems, embodiments of the present invention provide a method, a device, and a system for transmitting a measurement reference signal, and a storage medium.

An embodiment of the present invention provides a method for transmitting a measurement reference signal (SRS), where the method includes:

The base station sets the configuration information of the SRS, and delivers the configuration information of the SRS to the terminal device;

The configuration information includes: precoding enable indication information used to indicate whether the terminal device performs precoding on the SRS;

The precoding enable indication information includes:

The downlink transmission mode, or the downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of the antenna port, the scrambling code ID, and the number of layers.

The embodiment of the invention further provides a method for sending an SRS, the method comprising:

The terminal device receives configuration information of the SRS sent by the base station, and sends a pre-coded SRS or a pre-coded SRS according to the configuration information of the SRS;

The precoding enable indication information includes:

An embodiment of the present invention further provides a base station, where the base station includes: a setting module and a sending module;

The setting module is configured to set configuration information of the SRS, and forward the configuration information to the sending module;

The sending module is configured to send configuration information of the SRS to the terminal device;

The precoding enable indication information includes:

The embodiment of the present invention further provides a terminal device, where the terminal device includes: a receiving module and a processing sending module;

The receiving module is configured to receive configuration information of the SRS sent by the base station, and forward the configuration information to the processing and sending module;

The processing sending module is configured to send a pre-coded SRS or a pre-coded SRS according to the configuration information of the SRS;

The configuration information includes: precoding enable indication information configured to indicate whether the terminal device performs precoding on the SRS;

The precoding enable indication information includes:

An embodiment of the present invention further provides a sending system for an SRS, where the system includes: the base station and the terminal device described above.

The embodiment of the invention further provides a storage medium, wherein the storage medium stores a computer a program configured to perform the method of transmitting the measurement reference signal SRS.

The method, device, and system for transmitting a measurement reference signal provided by the embodiment of the present invention, the base station sets the configuration information of the SRS, and sends the configuration information of the SRS to the terminal device; the configuration information includes: used to indicate the terminal device Precoding enable indication information for whether the SRS is precoded; wherein the precoding enable indication information comprises: a downlink transmission mode, or a downlink control signaling format, or a number of transmission blocks of the terminal device, or an antenna port Joint indication information of the scrambling code ID and the number of layers. In the embodiment of the present invention, the user terminal may send the pre-coded SRS by combining the precoding enable control of the SRS with the transmission mode or the downlink control signaling format or the number of transmission blocks or the antenna port scrambling code ID and the number of layers. The information binding solves the problem of SRS precoding enable control, saves the overhead of downlink signaling, and implements more effective SRS precoding transmission, saves SRS multiplexing resources, and reduces SRS interference to neighboring areas, thereby achieving Improve the overall performance of the system.

DRAWINGS

In the drawings, which are not necessarily to scale, the Like reference numerals with different letter suffixes may indicate different examples of similar components. The drawings generally illustrate the various embodiments discussed herein by way of example and not limitation.

1 is a schematic view showing a comb structure of an SRS in the related art;

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

3 is a flowchart of implementing a method for transmitting a measurement reference signal according to another embodiment of the present invention;

4 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of configuration information sent by a base station to a terminal device according to Embodiment 2 of the present invention.

detailed description

According to the related art, the uplink physical channel of the Long Term Evolution (LTE) system includes a physical random access channel (Physical Random Access Channel, PRACH) and a physical uplink shared channel (Physical uplink shared channel). It is a PUSCH) and a physical uplink control channel (PUCCH for short).

In LTE, a Physical Downlink Control Channel (PDCCH) is used to carry uplink and downlink scheduling information and uplink power control information. The base station (e-Node-B, hereinafter referred to as eNB) can configure user equipment (User Equipment, UE for short) through downlink control information, or the terminal equipment can receive higher layer configuration, which is also configured by high layer signaling. UE. The format of the downlink control information (Downlink Control Information, DCI for short) is divided into

DCI formats

0, 1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 3, 3A, and the like. among them,

The DCI format 0 is used to indicate a scheduling of a physical uplink share channel (PUSCH);

The DCI format 1,1A, 1B, 1C, and 1D are used for different transmission modes of a physical downlink shared channel (PDSCH) of a single transport block;

The DCI format 2, 2A, 2B is used for different transmission modes of downlink PDSCH space division multiplexing;

The DCI format 3, 3A is used for transmission of a power uplink control channel (Physical uplink cont rol channel, PUCCH for short) and a power control command of the PUSCH.

The above DCI format 0, 1A, 3, 3A has the same transport block size, and DCI format 0, 1A uses 1 bit for format discrimination.

In the LTE system, the SRS sequence sent by the UE is through a root sequence.

It is obtained by cyclically shifting α in the time domain. By performing different cyclic shifts α on the same root sequence, different SRS sequences can be obtained, and the obtained SRS sequences are orthogonal to each other. Therefore, these SRS sequences can be allocated to different UEs to implement UE. Code division multiple access.

In addition, in the same SRS bandwidth, the sub-carriers of the SRS are placed at intervals, that is, the SRS is transmitted in a comb structure, and the number of frequency combs in the LTE system is 2 , also corresponds to the time domain repeat coefficient value (RePetition Factor, RPF for short) is 2. 1 is a schematic diagram of a comb structure of an SRS in the related art. As shown in FIG. 1, when each UE transmits an SRS, only one of two frequency combs is used, and Comb=0 or Comb=1 is shown. In this way, the UE transmits the SRS based on the frequency comb Comb position indication of the 1-bit upper layer signaling, and only uses the sub-carrier whose frequency domain index is even or odd. This comb structure allows more UEs to transmit SRS within the same SRS bandwidth.

Within the same SRS bandwidth, multiple UEs may use different cyclic shifts on the same frequency comb, and then send SRS through code division multiplexing, or two UEs may be combed on different frequencies and transmitted by frequency division multiplexing. SRS. For example, in an LTE system, a UE that transmits an SRS within a certain SRS bandwidth (4 RBs) can use 8 cyclic shifts and 2 frequency combs that can be used, so the UE has a total of 16 A resource that can be used to send SRS, that is, up to 16 SRSs can be sent simultaneously within this SRS bandwidth. Since the uplink single-user multiple input multiple output (SU-MI MO) is not supported in the LTE system, the UE can only transmit one SRS at each time, so only one SRS is required for one UE. Resources, therefore, within the above SRS bandwidth, the system can reuse up to 16 UEs simultaneously.

The LTE-Advanced (LTE-A) system is a next-generation evolution system of the LTE system, supports SU-MIMO in the uplink, and can use up to four antennas as uplink transmitting antennas. That is, the UE can simultaneously transmit SRS on multiple antennas at the same time, and the eNB needs to estimate the state on each channel according to the SRS received on each antenna. Downlink control information The format is based on the original LTE format, adding format 4 for uplink MIMO transmission, format 2C for downlink 8 antenna MIMO transmission, and format 2D for downlink coordinated multi-point (Coordinated Multi-point, referred to as CoMP) system. Transmission.

In the embodiment of the present invention, the base station sets the configuration information of the SRS, and delivers the configuration information of the SRS to the terminal device. The configuration information includes: a pre-prefix for indicating whether the terminal device performs precoding on the SRS. Encoding enable indication information; wherein the precoding enable indication information comprises: a downlink transmission mode, or a downlink control signaling format, or a number of transmission blocks of the terminal device, or a joint indication of an antenna port, a scrambling code ID, and a layer number information.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

2 is a flowchart of implementing a method for sending an SRS according to an embodiment of the present invention. As shown in FIG. 2, the method includes:

Step 201: The base station sets configuration information of the SRS, where the configuration information includes: precoding enable indication information used to indicate whether the terminal device performs precoding on the SRS.

Step 202: The base station sends configuration information of the SRS to the terminal device.

The precoding enable indication information includes: a downlink transmission mode, or a downlink control signaling format, or a number of transmission blocks of the terminal device, or joint indication information of an antenna port, a scrambling code ID, and a layer number.

In the embodiment of the present invention, the user terminal may send the pre-coded SRS by combining the precoding enable control of the SRS with the transmission mode or the downlink control signaling format or the number of transmission blocks or the antenna port scrambling code ID and the number of layers. The information binding solves the problem of SRS precoding enable control, saves the overhead of downlink signaling, and implements more effective SRS precoding transmission, saves SRS multiplexing resources, and reduces SRS interference to neighboring areas, thereby achieving Improve the overall performance of the system.

In the embodiment of the present invention, when the precoding enable indication information includes the downlink transmission mode, the base station sets the configuration information of the SRS, including:

When the base station configures the terminal device to be in the downlink transmission mode, the SRS sent by the terminal device is set. a pre-coded SRS; when the base station configures the terminal device to be in an uplink transmission mode, setting the SRS sent by the terminal device to a non-precoded SRS;

Or, when the base station configures the terminal device to be the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, the SRS sent by the terminal device is set as a pre-coded SRS; When the device is in a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, the SRS sent by the terminal device is set to be a non-precoded SRS.

In the embodiment of the present invention, when the precoding enable indication information includes a downlink control signaling format, the base station sets the configuration information of the SRS, including:

When the base station uses the downlink control signaling format 2B or the downlink control signaling format 2C or the downlink control signaling format 2D downlink control signaling to trigger the terminal device to send the SRS, the base station sets the SRS sent by the terminal device to be precoded. SRS; when the base station uses the downlink control signaling format 0, or the downlink control signaling format 4, or the downlink control signaling format 1A of the downlink control signaling to trigger the terminal device to send the SRS, the base station sets the SRS sent by the terminal device to be non-pre- Coded SRS;

Alternatively, when the base station uses the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, or the downlink control signaling format 1A of the downlink control signaling to trigger the terminal device to send the SRS, the base station configures The SRS sent by the terminal device is a pre-coded SRS. When the base station uses the downlink control signaling format of the downlink control signaling format 0 or the downlink control signaling format 4 to trigger the terminal device to send the SRS, the base station sets the SRS sent by the terminal device to Non-precoded SRS.

In the embodiment of the present invention, when the precoding enable indication information includes the number of transmission blocks of the terminal device, the base station sets the configuration information of the SRS, including:

When the number of uplink/downlink transport blocks configured by the base station to the terminal device is 1, or only one uplink/downlink transport block is enabled, the SRS sent by the terminal device is set to the precoded SRS; when the base station configures the uplink to the terminal device. The number of downlink transport blocks is 2, or two uplink/downlink transmissions. When the input block is enabled, the SRS sent by the terminal device is set to be a non-precoded SRS.

In the embodiment of the present invention, when the precoding enable indication information includes: the joint indication information of the antenna port, the scrambling code ID, and the layer number, the setting information of the SRS is set by the base station, including:

When the height 1 of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling configured by the base station to the terminal device is 0 or 1, the SRS sent by the terminal device is precoded. SRS;

When the upper 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling configured by the base station to the terminal device is 1 or 0, the SRS sent by the terminal device is set to be non-precoded. SRS.

In an embodiment, the precoding enable indication information further includes: information indicating a period of the precoding SRS and a subframe offset.

In the embodiment of the present invention, the setting information of the SRS is set by the base station, and the method further includes:

And the base station sets, by the upper layer RRC signaling, information about a period of the precoding SRS and a subframe offset for the terminal device.

In an embodiment, the precoding enable indication information further includes: indication information of a precoding matrix index.

In the embodiment of the present invention, when the precoding enable indication information includes: indication information of the precoding matrix index, the setting information of the SRS is set by the base station, including:

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a unit matrix, the terminal device is configured to send the non-precoded SRS;

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a non-unit matrix, the terminal device is set to send the precoded SRS.

An embodiment of the present invention further provides a method for transmitting a measurement reference signal SRS. As shown in FIG. 3, the method includes:

Step 301: The terminal device receives configuration information of the SRS sent by the base station, where the configuration information is The method includes: precoding enable indication information used to indicate whether the terminal device performs precoding on the SRS;

Step 302: The terminal device sends a pre-coded SRS or a pre-coded SRS according to the configuration information of the SRS.

In the embodiment of the present invention, the terminal device sends a pre-coded SRS or a non-precoded SRS according to the configuration information of the SRS, including:

When the precoding enable indication information in the configuration information of the SRS is enabled, the terminal device precodes the SRS to be sent, and sends a precoded SRS to the base station;

When the precoding enable indication information in the configuration information of the SRS indicates that the inactivation is not enabled, the terminal device sends the SRS that is not precoded to the base station.

In the embodiment of the present invention, when the precoding enable indication information includes a downlink transmission mode,

Transmitting, by the terminal device, the pre-coded SRS or the un-precoded SRS according to the configuration information, including:

When the terminal device determines that it is configured to be in the downlink transmission mode, the pre-coded SRS is sent; when it is determined that it is configured to be in the uplink transmission mode, the non-precoded SRS is sent;

Alternatively, when the terminal device determines that it is configured to be in the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, the pre-coded SRS is transmitted; determining that it is configured to be in addition to the downlink transmission Mode 8, downlink transmission mode 9, downlink transmission mode 10 When the transmission mode is other than the downlink transmission mode 11, the non-precoded SRS is transmitted.

In the embodiment of the present invention, when the precoding enable indication information includes a downlink control signaling format,

The terminal device sends the pre-coded SRS when receiving the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, which is sent by the base station, and sends the SRS; Sending a non-precoded SRS to the downlink control signaling format 0, or the downlink control signaling format 4, or the downlink control signaling format 1A of the downlink control signaling format 1A sent by the base station;

Alternatively, the terminal device receives the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, or the downlink control signaling format 1A, which is sent by the base station to trigger the sending of the SRS. When the pre-coded SRS is sent, when the base station sends the downlink control signaling format 0 of the SRS or the downlink control signaling format of the downlink control signaling format 4, the non-precoded SRS is sent.

In the embodiment of the present invention, when the precoding enable indication information includes the number of transmission blocks of the terminal device,

When the number of uplink/downlink transport blocks of the terminal device configured by the base station is 1, or only one uplink/downlink transport block is enabled, the terminal device sends the precoded SRS; when the base station configures the terminal device When the number of uplink/downlink transport blocks is 2, or both uplink/downlink transport blocks are enabled, the terminal device transmits a non-precoded SRS.

In the embodiment of the present invention, when the precoding enable indication information includes joint indication information of an antenna port, a scrambling code ID, and a layer number,

Transmitting, by the terminal device, the pre-coded SRS or not precoding according to the configuration information SRS, including:

When the height 1 of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling received by the terminal device is 0 or 1, the pre-coded SRS is sent; the received downlink control signaling is received. The non-precoded SRS is transmitted when the upper 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number is 1 or 0.

In the embodiment of the present invention, the terminal device sends a pre-coded SRS or a pre-coded SRS according to the configuration information, including:

And when the terminal device determines that the subframe index of the transmitting SRS subframe set by the base station satisfies the relationship between the indication precoding SRS period and the subframe offset, and sends the precoded SRS; otherwise, sends the nonprecoded SRS.

In the embodiment of the present invention, when the precoding enable indication information includes indication information of a precoding matrix index,

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a unit matrix, the terminal device sends a non-precoded SRS;

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a non-unit matrix, the terminal device transmits the precoded SRS.

The embodiment of the present invention further provides a base station. As shown in FIG. 4, the base station 40 includes: a setting module 401 and a sending module 402.

The setting module 401 is configured to set configuration information of the SRS, and forward the information to the sending Module

The sending module 402 is configured to send configuration information of the SRS to the terminal device;

The precoding enable indication information includes:

When the base station configures the terminal device to be in the downlink transmission mode, the setting module 401 is configured to set the SRS sent by the terminal device to be a pre-coded SRS; when the base station configures the terminal device to be in the uplink transmission mode, the setting module 401 is configured. SRS for setting the terminal device to be a non-precoded SRS;

Alternatively, when the base station configures the terminal device to be the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, the setting module 401 is configured to set the SRS sent by the terminal device to be precoded. SRS; when the base station configures the terminal device to be a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, the setting module 401 is configured to set the terminal device to send The SRS is a non-precoded SRS.

When the base station uses the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control When the downlink control signaling of the signaling format 2D triggers the terminal device to send the SRS, the setting module 401 is configured to set the SRS sent by the terminal device to be a pre-coded SRS; when the base station uses the downlink control signaling format 0, or downlink When the control signaling format 4 or the downlink control signaling of the downlink control signaling format 1A triggers the terminal device to send the SRS, the setting module 401 is configured to set the SRS sent by the terminal device to be a non-precoded SRS;

Alternatively, when the base station uses the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, or the downlink control signaling format of the downlink control signaling format 1A to trigger the terminal device to send the SRS, the setting is performed. The module 401 is configured to configure the SRS sent by the terminal device to be a pre-coded SRS. When the base station uses the downlink control signaling format of the downlink control signaling format 0 or the downlink control signaling format 4 to trigger the terminal device to send the SRS, the setting is performed. The module 401 is configured to set the SRS sent by the terminal device to be a non-precoded SRS.

The setting module 401 is configured to set the SRS sent by the terminal device to be a pre-coded SRS when the base station configures the number of the uplink/downlink transport blocks to be 1 or the uplink/downlink transport block is enabled. The setting module 401 is configured to set the SRS sent by the terminal device to be a non-precoded SRS, when the number of the uplink/downlink transmission blocks is 2, or the two uplink/downlink transmission blocks are both enabled.

In the embodiment of the present invention, when the precoding enable indication information includes: joint indication information of an antenna port, a scrambling code ID, and a layer number,

When the height 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling configured by the base station to the terminal device is 0 or 1, the setting module 401 is configured to send the terminal device to send SRS is a pre-coded SRS;

When the height 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling configured by the base station to the terminal device is 1 or 0, the setting module 401 is configured to be configured. The SRS sent by the terminal device is a non-precoded SRS.

In the embodiment of the present invention, the setting module 401 is further configured to set, by the high layer RRC signaling, information about a period of the precoding SRS and a subframe offset for the terminal device.

In the embodiment of the present invention, when the precoding enable indication information includes: indication information of a precoding matrix index,

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a unit array, the setting module 401 is configured to set the terminal device to send the non-precoded SRS;

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a non-unit matrix, the setting module 401 is configured to set the terminal device to send the precoded SRS.

The embodiment of the present invention further provides a terminal device. As shown in FIG. 5, the terminal device 50 includes: a receiving module 501 and a processing sending module 502.

The receiving module 501 is configured to receive configuration information of the SRS sent by the base station, and forward the configuration information to the processing and sending module.

The processing sending module 502 is configured to send a pre-coded SRS or a pre-coded SRS according to the configuration information of the SRS;

The precoding enable indication information includes:

The embodiment of the present invention can implement that the user terminal sends the pre-coded SRS by using the SRS. The precoding enabling control is combined with the transmission mode or the downlink control signaling format or the number of transmission blocks or the joint indication information of the antenna port scrambling code ID and the number of layers, which solves the problem of SRS precoding enable control and saves the downlink information. The overhead of the command is to achieve more efficient SRS precoding transmission, save SRS multiplexing resources, and reduce the interference of SRS to the neighboring area, thereby achieving the effect of improving the overall performance of the system.

In the embodiment of the present invention,

The processing sending module 502 is configured to: when the precoding enable indication information in the configuration information of the SRS is determined to be enabled, perform precoding on the SRS to be sent, and send a precoded SRS to the base station. ;

When it is determined that the precoding enable indication information in the configuration information of the SRS is not enabled, the SRS that is not precoded is transmitted to the base station.

The processing sending module 502 is configured to: when the terminal device is configured to be in a downlink transmission mode, send a pre-coded SRS; and when the terminal device is configured to be in an uplink transmission mode, send a non-precoded SRS;

Or, configured to: when the terminal device is configured to be configured as the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, send the pre-coded SRS; determine that the terminal device is configured The non-precoded SRS is transmitted in a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11.

The processing and sending module 502 is configured to: when the terminal device receives the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, which is triggered by the base station, And transmitting, by the base station, the downlink control signaling format 0, or the downlink control signaling format 4, or the downlink control signaling format 1A downlink control signaling sent by the base station, where the terminal control device sends the SRS. Sending a non-precoded SRS;

Or configured to receive, by the terminal device, a downlink control that triggers sending an SRS sent by the base station. When the signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, or the downlink control signaling format 1A, the downlink control signaling is sent, the pre-coded SRS is sent; the terminal device receives the base station to send When the downlink control signaling format 0 of the SRS or the downlink control signaling of the downlink control signaling format 4 is triggered, the non-precoded SRS is transmitted.

The process sending module 502 is configured to: when the number of uplink/downlink transport blocks of the terminal device configured by the base station is 1, or only one uplink/downlink transport block is enabled, send a pre-coded SRS; determine a base station configuration. When the number of uplink/downlink transport blocks of the terminal device is 2, or when both uplink/downlink transport blocks are enabled, the non-precoded SRS is transmitted.

The processing sending module 502 is configured to: when the height 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling received by the terminal device is 0 or 1, the pre-coded transmission is performed. SRS; when the upper 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling received by the terminal device takes a value of 1 or 0, the non-precoded SRS is transmitted.

In the embodiment of the present invention, the processing and sending module 502 is further configured to: when the subframe index of the transmitting SRS subframe set by the base station meets the relationship between the indication precoding SRS period and the subframe offset, the precoding is performed. SRS; otherwise, send a non-precoded SRS.

The processing and sending module 502 is configured to: when it is determined that the precoding matrix indicated by the precoding matrix index configured by the base station is a unit array, send a non-precoded SRS; and determine a precoding matrix index indicated by the base station to the terminal device. When the precoding matrix is a non-unit matrix, the precoded SRS is transmitted.

The embodiment of the present invention further provides a transmitting system for measuring a reference signal SRS, the system comprising: the base station 40 and the terminal device 50 described above.

The present invention is described below in conjunction with specific embodiments of several different scenarios.

Embodiment 1

In this embodiment, the base station sends the SRS configuration information to the user terminal, where the configuration information includes: precoding enable indication information used to indicate whether the SRS is precoded; wherein, the downlink transmission mode and the precoding The enable indication information is related, that is, the precoding enable indication information includes a downlink transmission mode.

When the base station configures the terminal device to be in the downlink transmission mode, the SRS sent by the terminal device is set to the pre-coded SRS; when the base station configures the terminal device to be in the uplink transmission mode, the SRS sent by the terminal device is set to be a non-precoded SRS;

Or, when the base station configures the terminal device to be the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, the SRS sent by the terminal device is set as a pre-coded SRS; When the device is in a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, the SRS sent by the terminal device is set to be a non-precoded SRS;

If precoding is to be performed, precoding is performed according to precoding information (Precoding Matrix Index, PMI for short) carried in the downlink control signaling; or precoding information according to the last transmission or the latest corresponding downlink control signaling. Precoding; or performing precoding according to precoding information in the configuration information; or, the UE measuring a reference signal (CSI-RS) for channel state information and/or a cell-specific reference signal in the downlink reference signal (CRS) to get Deriving a downlink channel, and predicting an uplink channel by channel reciprocity, performing singular value decomposition on the uplink channel to obtain a left singular matrix, a right singular matrix, and a diagonal matrix, and selecting a column corresponding to the largest singular value from the right singular matrix The vector is precoded as a precoding matrix for the SRS.

The downlink control signaling in this embodiment is format 4 or format 2B or format 2C or format 2D or format 2E.

When the precoding enable indication information indication is enabled, the user terminal precodes the SRS to be sent, and sends a precoded SRS to the base station; and the precoding enable indication information When the indication is not enabled, the SRS that is not precoded is transmitted to the base station.

Embodiment 2

The method for transmitting the measurement reference signal provided in this embodiment is implemented by a system including a base station and a user terminal. among them,

The base station is configured to trigger the user terminal to send a measurement reference signal, and send configuration information of the measurement reference signal to the user terminal;

The foregoing configuration information includes one or more pieces of indication information: precoding enable indication information of the measurement reference signal, and precoding information of the measurement reference signal.

The user terminal is configured to send a measurement reference signal to the base station according to the obtained configuration information.

In this embodiment, the configuration information that the base station sends the measurement reference signal to the user terminal may be configured as shown in FIG. 6:

For aperiodic SRS, it is configured to not require precoding;

For the periodic SRS, the base station configures the user terminal-specific SRS period and the pre-coded SRS period for the user terminal by using the high-layer RRC signaling, where the pre-coded SRS period is an integer multiple of the user terminal-specific SRS period. On the subframe of the periodic SRS, when the subframe index satisfies the precoding SRS period and the subframe offset relationship, for example, when the relationship of (10·n _f + k _{SRS -} T _offset ) modT _SRS =0 is satisfied, the pre-transmission is performed. The encoded SRS, otherwise, sends a pre-coded SRS. Where n _f is the system frame number, k _SRS is the subframe index number in the frame, T _offset is the subframe offset, and T _SRS is the period of the pre-coded SRS. The base station may configure the period of the precoding SRS and the value of the subframe offset according to factors such as a scenario, a channel condition, a moving speed, and the like of the user terminal.

In this embodiment, the precoding enable indication information of the measurement reference signal is used to indicate whether the measurement reference signal is to be precoded.

In this embodiment, if precoding is to be performed, precoding is performed according to the precoding information carried in the downlink control signaling; or precoding is performed according to precoding information of the last transmission or the latest corresponding downlink control signaling; Or performing precoding according to the precoding information in the foregoing configuration information; or, the UE is configured to measure a reference signal (CSI-RS) for channel state information and/or a cell-specific reference signal (CRS) in the downlink reference signal. Obtaining a downlink channel, and predicting an uplink channel by channel reciprocity, performing singular value decomposition on the uplink channel to obtain a left singular matrix, a right singular matrix, and a diagonal matrix, and selecting a column corresponding to the largest singular value from the right singular matrix The vector is precoded as a precoding matrix for the SRS.

In this embodiment, the downlink control signaling may also be format 4 or format 2B or format 2C or format 2D or format 2E.

Embodiment 3

In this embodiment, the base station sends the SRS configuration information to the user terminal, where the configuration information includes: precoding enable indication information used to indicate whether the terminal device performs precoding on the SRS, the precoding The enable indication information includes: information indicating a period of the pre-coded SRS and a subframe offset, and the base station sets, by the higher layer RRC signaling, information about a period of the pre-coded SRS and a subframe offset for the terminal device.

On the subframe in which the SRS is set by the base station, when the subframe index satisfies the relationship between the precoding SRS period and the subframe offset, for example, satisfying (10·n _f + k _{SRS -} T _offset ) modT _SRS =0 The relationship, or the relationship of (k _{SRS -} T _{offset, 1} ) mod5 = 0, the terminal device transmits the pre-coded SRS; otherwise, the pre-coded SRS is transmitted.

Where n _f is the system frame number, k _SRS is the subframe index number in the frame, T _offset is the subframe offset, and T _SRS is the period of the pre-coded SRS. The base station may configure the period of the precoding SRS and the value of the subframe offset according to factors such as a scenario, a channel condition, a moving speed, and the like of the user terminal.

For FDD and TDD systems, the precoding SRS period and subframe offset configuration can be referred to Tables 1 and 2.

Table 1 User terminal-specific precoding SRS period and subframe offset configuration (FDD system)

Table 2 User-Proprietary Precoding SRS Period and Subframe Offset Configuration (TDD System)

Embodiment 4

In this embodiment, the base station sends the configuration information of the SRS to the user terminal, where the configuration information includes: precoding enable indication information used to indicate whether the SRS is pre-coded; wherein, the downlink control signaling format is The precoding enable indication information is related, that is, the precoding enable indication information includes a downlink control signaling format.

When the base station uses the downlink control signaling format 2B or the downlink control signaling format 2C or the downlink control signaling format 2D downlink control signaling to trigger the terminal device to send the SRS, the base station sets the SRS sent by the terminal device to be precoded. SRS; when the base station uses the downlink control signaling format 0, Or the downlink control signaling format 4 or the downlink control signaling format 1A downlink control signaling triggers the terminal device to send the SRS, the base station sets the SRS sent by the terminal device to be a non-precoded SRS;

Alternatively, when the base station uses the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, or the downlink control signaling format 1A of the downlink control signaling to trigger the terminal device to send the SRS, the base station configures The SRS sent by the terminal device is a pre-coded SRS. When the base station uses the downlink control signaling format of the downlink control signaling format 0 or the downlink control signaling format 4 to trigger the terminal device to send the SRS, the base station sets the SRS sent by the terminal device to Non-precoded SRS;

If precoding is to be performed, precoding is performed according to precoding information (Precoding Matrix Index, PMI for short) carried in the downlink control signaling; or precoding information according to the last transmission or the latest corresponding downlink control signaling. Precoding; or performing precoding according to precoding information in the configuration information; or, the UE measuring a reference signal (CSI-RS) for channel state information and/or a cell-specific reference signal in the downlink reference signal (CRS) to obtain a downlink channel, and predicting an uplink channel by channel reciprocity, performing singular value decomposition on the uplink channel to obtain a left singular matrix, a right singular matrix, and a diagonal matrix, and selecting a largest singular value from the right singular matrix The corresponding column vector is used as a precoding matrix to precode the SRS.

Embodiment 5

In this embodiment, the base station sends the configuration information of the SRS to the user terminal, where the configuration information includes: precoding enable indication information used to indicate whether the SRS is precoded; wherein the number of the transport blocks is The coding enable indication information is related, that is, the precoding enable indication The information includes the number of transport blocks of the terminal device.

When the number of uplink/downlink transport blocks configured by the base station to the terminal device is 1, or only one uplink/downlink transport block is enabled, the SRS sent by the terminal device is set to the precoded SRS; when the base station configures the uplink to the terminal device. When the number of downlink transport blocks is 2, or when both uplink/downlink transport blocks are enabled, the SRS sent by the terminal device is set to be a non-precoded SRS;

Embodiment 6

In this embodiment, the base station sends the configuration information of the SRS to the user terminal, where the configuration information includes: precoding enable indication information used to indicate whether the SRS is precoded; wherein, the antenna port of the user, the interference The joint indication information of the code ID (identity) and the number of layers is related to the precoding enable indication information, that is, the precoding enable indication information includes: joint indication information of an antenna port, a scrambling code ID, and a layer number.

Antenna port, scrambling code ID, and number of layers in downlink control signaling configured by the base station to the terminal device When the upper 1 bit of the joint indication information is 0 or 1, the SRS sent by the terminal device is set to the pre-coded SRS; the antenna port, the scrambling code ID, and the downlink control signaling configured by the base station to the terminal device When the upper 1 bit of the joint indication information of the layer number is 1 or 0, the SRS sent by the terminal device is set to be a non-precoded SRS;

Example 7

In this embodiment, the base station sends the configuration information of the SRS to the user terminal, where the configuration information includes: precoding enable indication information used to indicate whether the SRS is precoded; wherein, the indication of the precoding matrix index The information is related to the precoding enable indication information, that is, the precoding enable indication information includes: indication information of a precoding matrix index.

When the precoding matrix indicated by the precoding matrix index is a unit matrix, it is a unit matrix corresponding to 2 transmitting antennas.

Or the corresponding array of 4 transmit antennas

The SRS sent by the terminal device is set to a non-precoded SRS. When the precoding matrix indicated by the precoding matrix index is a non-array matrix, the SRS sent by the terminal device is set to be a precoded SRS.

If precoding is to be performed, precoding is performed according to the indication information of the precoding matrix index.

Example eight

In this embodiment, the base station sends configuration information of the SRS to the user terminal, where the configuration information includes: precoding enable indication information for indicating whether to perform precoding on the SRS. The precoding enable indication information includes:

When the precoding enable indication information indicates that the SRS is to be precoded, the matrix is adopted.

The SRS is precoded, where R _IN is a covariance matrix of interference plus noise, η is a predefined parameter of the base station and the user equipment, and () ^T represents a transpose of the matrix.

The base station receives the pre-coded SRS, measures the uplink equivalent channel, and then obtains the downlink equivalent channel through channel reciprocity, when the user equipment adopts the matrix.

When filtering and receiving the downlink signal, the downlink interference plus noise can be whitened, thereby increasing the downlink transmission capacity, thereby achieving the effect of improving the overall performance of the system.

The embodiment of the invention further describes a storage medium in which a computer program is stored, the computer program being configured to execute the transmission method of the measurement reference signal SRS of the foregoing embodiments.

Through the foregoing description, it can be seen that the embodiment of the present invention can implement that the user terminal sends the pre-coded SRS by using the precoding enable control and transmission mode or downlink control signaling format or the number of transmission blocks or the antenna port scrambling code ID of the SRS. The joint indication information of the layer and the number of layers is used to solve the problem of SRS precoding enable control, which saves the overhead of downlink signaling, thereby implementing more effective SRS precoding transmission, saving SRS multiplexing resources, and reducing SRS to neighboring areas. The interference, in turn, achieves the effect of improving the overall performance of the system.

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

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

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

The present invention can implement that the user terminal sends the pre-coded SRS, by binding the pre-coding enable control of the SRS with the transmission mode or the downlink control signaling format or the number of transmission blocks or the joint indication information of the antenna port scrambling code ID and the number of layers. The problem of SRS precoding enable control is solved, and the overhead of downlink signaling is saved, thereby realizing more effective SRS precoding transmission, saving SRS multiplexing resources, reducing SRS interference to neighboring areas, and thus improving the system. The overall performance effect.

Claims

A method for transmitting a measurement reference signal SRS, the method comprising:

The base station sets the configuration information of the SRS, and delivers the configuration information of the SRS to the terminal device;

The configuration information includes: precoding enable indication information used to indicate whether the terminal device performs precoding on the SRS;

The precoding enable indication information includes:

The downlink transmission mode, or the downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of the antenna port, the scrambling code ID, and the number of layers.
The method according to claim 1, wherein, when the precoding enable indication information includes a downlink transmission mode, the base station sets configuration information of the SRS, including:

When the base station configures the terminal device to be in the downlink transmission mode, the SRS sent by the terminal device is set to the pre-coded SRS; when the base station configures the terminal device to be in the uplink transmission mode, the SRS sent by the terminal device is set to be a non-precoded SRS;

Or, when the base station configures the terminal device to be the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, the SRS sent by the terminal device is set as a pre-coded SRS; When the device is in a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, the SRS sent by the terminal device is set to be a non-precoded SRS.
The method according to claim 1, wherein, when the precoding enable indication information includes a downlink control signaling format, the base station sets configuration information of the SRS, including:

When the base station uses the downlink control signaling format 2B or the downlink control signaling format 2C or the downlink control signaling format 2D downlink control signaling to trigger the terminal device to send the SRS, the base station sets the SRS sent by the terminal device to be precoded. SRS; when the base station uses the downlink control signaling format 0, or the downlink control signaling format 4, or the downlink control signaling format 1A of the downlink control signaling to trigger the terminal device to send the SRS, the base station sets the SRS sent by the terminal device to be non-pre- Coded SRS;

Alternatively, when the base station uses the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, or the downlink control signaling format 1A of the downlink control signaling to trigger the terminal device to send the SRS, the base station configures The SRS sent by the terminal device is a pre-coded SRS. When the base station uses the downlink control signaling format of the downlink control signaling format 0 or the downlink control signaling format 4 to trigger the terminal device to send the SRS, the base station sets the SRS sent by the terminal device to Non-precoded SRS.
The method according to claim 1, wherein, when the precoding enable indication information includes the number of transmission blocks of the terminal device, the base station sets configuration information of the SRS, including:

When the number of uplink/downlink transport blocks configured by the base station to the terminal device is 1, or only one uplink/downlink transport block is enabled, the SRS sent by the terminal device is set to the precoded SRS; when the base station configures the uplink to the terminal device. When the number of downlink transport blocks is 2, or when both uplink/downlink transport blocks are enabled, the SRS sent by the terminal device is set to be a non-precoded SRS.
The method according to claim 1, wherein, when the precoding enable indication information comprises: joint indication information of an antenna port, a scrambling code ID and a layer number, the base station sets configuration information of the SRS, including:

When the height 1 of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling configured by the base station to the terminal device is 0 or 1, the SRS sent by the terminal device is precoded. SRS;

When the upper 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling configured by the base station to the terminal device is 1 or 0, the SRS sent by the terminal device is set to be non-precoded. SRS.
The method of claim 1, wherein the precoding enable indication information further comprises: information indicating a period of the precoded SRS and a subframe offset.
The method according to claim 6, wherein the setting of the configuration information of the SRS by the base station further includes:

And the base station sets, by the upper layer RRC signaling, information about a period of the precoding SRS and a subframe offset for the terminal device.
The method of claim 1, wherein the precoding enable indication information further comprises: indication information of a precoding matrix index.
The method according to claim 8, wherein, when the precoding enable indication information comprises: indication information of a precoding matrix index, the setting information of the SRS is set by the base station, including:

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a unit matrix, the terminal device is configured to send the non-precoded SRS;

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a non-unit matrix, the terminal device is set to send the precoded SRS.
A method for transmitting a measurement reference signal SRS, the method comprising:

The terminal device receives configuration information of the SRS sent by the base station, and sends a pre-coded SRS or a pre-coded SRS according to the configuration information of the SRS;

The configuration information includes: precoding enable indication information used to indicate whether the terminal device performs precoding on the SRS;

The precoding enable indication information includes:

The downlink transmission mode, or the downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of the antenna port, the scrambling code ID, and the number of layers.
The method according to claim 10, wherein the terminal device sends the pre-coded SRS or the un-precoded SRS according to the configuration information of the SRS, including:

When the precoding enable indication information in the configuration information of the SRS is enabled, the terminal device precodes the SRS to be sent, and sends a precoded SRS to the base station;

When the precoding enable indication information in the configuration information of the SRS indicates that the inactivation is not enabled, the terminal device sends the SRS that is not precoded to the base station.
The method of claim 10 wherein said precoding enable indication packet When the downlink transmission mode is included,

Transmitting, by the terminal device, the pre-coded SRS or the un-precoded SRS according to the configuration information, including:

When the terminal device determines that it is configured to be in the downlink transmission mode, the pre-coded SRS is sent; when it is determined that it is configured to be in the uplink transmission mode, the non-precoded SRS is sent;

Alternatively, when the terminal device determines that it is configured to be in the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, the pre-coded SRS is transmitted; determining that it is configured to be in addition to the downlink transmission In the transmission mode other than the mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, the non-precoded SRS is transmitted.
The method according to claim 10, wherein when the precoding enable indication information comprises a downlink control signaling format,

Transmitting, by the terminal device, the pre-coded SRS or the un-precoded SRS according to the configuration information, including:

The terminal device sends the pre-coded SRS when receiving the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, which is sent by the base station, and sends the SRS; Sending a non-precoded SRS to the downlink control signaling format 0, or the downlink control signaling format 4, or the downlink control signaling format 1A of the downlink control signaling format 1A sent by the base station;

Alternatively, the terminal device receives the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, or the downlink control signaling format 1A, which is sent by the base station to trigger the sending of the SRS. When the pre-coded SRS is sent, when the base station sends the downlink control signaling format 0 of the SRS or the downlink control signaling format of the downlink control signaling format 4, the non-precoded SRS is sent.
The method according to claim 10, wherein when said precoding enable indication information includes a number of transmission blocks of said terminal device,

Transmitting, by the terminal device, the pre-coded SRS or the un-precoded SRS according to the configuration information, including:

When the number of uplink/downlink transport blocks of the terminal device configured by the base station is 1, or only one uplink/downlink transport block is enabled, the terminal device sends the precoded SRS; when the base station configures the terminal device When the number of uplink/downlink transport blocks is 2, or both uplink/downlink transport blocks are enabled, the terminal device transmits a non-precoded SRS.
The method according to claim 10, wherein when the precoding enable indication information includes joint indication information of an antenna port, a scrambling code ID, and a layer number,

Transmitting, by the terminal device, the pre-coded SRS or the un-precoded SRS according to the configuration information, including:

When the height 1 of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling received by the terminal device is 0 or 1, the pre-coded SRS is sent; the received downlink control signaling is received. The non-precoded SRS is transmitted when the upper 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number is 1 or 0.
The method of claim 10, wherein the precoding enable indication information further comprises: information indicating a period of the precoded SRS and a subframe offset.
The method according to claim 16, wherein the terminal device sends the pre-coded SRS or the un-precoded SRS according to the configuration information, including:

And when the terminal device determines that the subframe index of the transmitting SRS subframe set by the base station satisfies the relationship between the indication precoding SRS period and the subframe offset, and sends the precoded SRS; otherwise, sends the nonprecoded SRS.
The method according to claim 10, wherein the precoding enable indication information further comprises: indication information of a precoding matrix index.
The method according to claim 18, wherein when said precoding enable indication information includes indication information of a precoding matrix index,

Transmitting, by the terminal device, the pre-coded SRS or the un-precoded SRS according to the configuration information, including:

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a unit matrix, the terminal device sends a non-precoded SRS;

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a non-unit matrix, the terminal device transmits the precoded SRS.
A base station, the base station includes: a setting module and a sending module; wherein

The setting module is configured to set configuration information of the SRS, and forward the configuration information to the sending module;

The sending module is configured to send configuration information of the SRS to the terminal device;

The configuration information includes: precoding enable indication information used to indicate whether the terminal device performs precoding on the SRS;

The precoding enable indication information includes:

The downlink transmission mode, or the downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of the antenna port, the scrambling code ID, and the number of layers.
The base station according to claim 20, wherein when the precoding enable indication information includes a downlink transmission mode,

When the base station configures the terminal device to be in the downlink transmission mode, the setting module is configured to set the SRS sent by the terminal device to be a pre-coded SRS; when the base station configures the terminal device to be in the uplink transmission mode, the setting module is configured to be configured. The SRS sent by the terminal device is a non-precoded SRS;

Or, when the base station configures the terminal device to be the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, the setting module is configured to set the SRS sent by the terminal device to be precoded. SRS; when the base station configures the terminal device to be a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, the setting module is configured to set the SRS sent by the terminal device. Non-precoded SRS.
The base station according to claim 20, wherein when the precoding enable indication information includes a downlink control signaling format,

When the base station uses the downlink control signaling format 2B or the downlink control signaling format 2C or the downlink control signaling format 2D downlink control signaling to trigger the terminal device to send the SRS, the setting module is configured to set the SRS sent by the terminal device. The pre-coded SRS; when the base station uses the downlink control signaling format 0, or the downlink control signaling format 4, or the downlink control signaling format 1A, the downlink control signaling triggers the terminal device to send the SRS, the setting module is configured. SRS for setting the terminal device to be a non-precoded SRS;

Alternatively, when the base station uses the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, or the downlink control signaling format of the downlink control signaling format 1A to trigger the terminal device to send the SRS, the setting is performed. The module is configured to configure the SRS sent by the terminal device to be a pre-coded SRS; when the base station uses the downlink control signaling format of the downlink control signaling format 0 or the downlink control signaling format 4 to trigger the terminal device to send the SRS, the setting module , configured to set the SRS sent by the terminal device to be a non-precoded SRS.
The base station according to claim 20, wherein when the precoding enable indication information includes a number of transmission blocks of the terminal device,

The setting module is configured to set the SRS sent by the terminal device to be a pre-coded SRS when the base station configures the number of uplink/downlink transport blocks to be 1 or when only one uplink/downlink transport block is enabled to the terminal device; The setting module is configured to set the SRS sent by the terminal device to be a non-precoded SRS, when the number of the uplink/downlink transport blocks is 2, or the two uplink/downlink transport blocks are both enabled.
The base station according to claim 20, wherein when the precoding enable indication information includes: joint indication information of an antenna port, a scrambling code ID, and a layer number,

Antenna port, scrambling code ID, and number of layers in downlink control signaling configured by the base station to the terminal device The setting module is configured to set the SRS sent by the terminal device to be a pre-coded SRS when the high-order 1 bit of the joint indication information is 0 or 1.

When the height 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling configured by the base station to the terminal device is 1 or 0, the setting module is configured to set the sending by the terminal device. SRS is a non-precoded SRS.
The base station according to claim 20, wherein the precoding enable indication information further comprises: information indicating a period of the precoded SRS and a subframe offset.
The base station according to claim 25, wherein

The setting module is further configured to set, by the high layer RRC signaling, information about a period of the precoding SRS and a subframe offset for the terminal device.
The base station according to claim 20, wherein the precoding enable indication information further comprises: indication information of a precoding matrix index.
The base station according to claim 27, wherein when the precoding enable indication information comprises: indication information of a precoding matrix index,

When the precoding matrix indicated by the precoding matrix index configured by the base station is a unit array, the setting module is configured to set the terminal device to send the non-precoded SRS;

When the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a non-unit matrix, the setting module is configured to set the terminal device to send the precoded SRS.
A terminal device, the terminal device includes: a receiving module and a processing transmitting module; wherein

The receiving module is configured to receive configuration information of the SRS sent by the base station, and forward the configuration information to the processing and sending module;

The processing sending module is configured to send a pre-coded SRS or a pre-coded SRS according to the configuration information of the SRS;

The configuration information includes: indicating whether the terminal device pre-programs the SRS Precoding enable indication information of the code;

The precoding enable indication information includes:

The downlink transmission mode, or the downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of the antenna port, the scrambling code ID, and the number of layers.
The terminal device according to claim 29, wherein

The processing sending module is configured to: when the precoding enable indication information in the configuration information of the SRS is determined to be enabled, precoding the SRS to be sent, and sending a precoded SRS to the base station;

When it is determined that the precoding enable indication information in the configuration information of the SRS is not enabled, the SRS that is not precoded is transmitted to the base station.
The terminal device according to claim 29, wherein when the precoding enable indication information includes a downlink transmission mode,

The processing sending module is configured to: when the terminal device is configured to be in a downlink transmission mode, send a pre-coded SRS; and when the terminal device is configured to be in an uplink transmission mode, send a non-precoded SRS;

Or, configured to: when the terminal device is configured to be configured as the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, send the pre-coded SRS; determine that the terminal device is configured The non-precoded SRS is transmitted in a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11.
The terminal device according to claim 29, wherein when the precoding enable indication information includes a downlink control signaling format,

The processing and sending module is configured to: when the terminal device receives the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, which is sent by the base station, Transmitting a pre-coded SRS; the terminal device receives a downlink control signaling format 0, or a downlink control signaling format 4, or a downlink sent by the base station to trigger the transmission of the SRS. When the downlink control signaling of the control signaling format 1A is performed, the non-precoded SRS is sent;

Or, configured to receive, by the terminal device, a downlink control signaling format 2B, or a downlink control signaling format 2C, or a downlink control signaling format 2D, or a downlink control signaling format 1A, which is triggered by the base station to send the SRS. When the signaling is sent, the pre-coded SRS is sent; when the terminal device receives the downlink control signaling format 0 that triggers the sending of the SRS or the downlink control signaling of the downlink control signaling format 4, the terminal device sends the non-pre-coded SRS.
The terminal device according to claim 29, wherein when the precoding enable indication information includes a number of transmission blocks of the terminal device,

The processing sending module is configured to: when determining that the number of uplink/downlink transport blocks of the terminal device configured by the base station is 1, or only one uplink/downlink transport block is enabled, sending the pre-coded SRS; determining the configuration of the base station When the number of uplink/downlink transport blocks of the terminal device is 2, or when both uplink/downlink transport blocks are enabled, the non-precoded SRS is sent.
The terminal device according to claim 29, wherein when the precoding enable indication information includes joint indication information of an antenna port, a scrambling code ID, and a layer number,

The processing and sending module is configured to send the pre-coded SRS when the upper 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling received by the terminal device is 0 or 1. When the upper 1 bit of the joint indication information of the antenna port, the scrambling code ID, and the layer number in the downlink control signaling received by the terminal device takes a value of 1 or 0, the non-precoded SRS is transmitted.
The terminal device according to claim 29, wherein the precoding enable indication information further comprises: information indicating a period of the precoded SRS and a subframe offset.
The terminal device according to claim 35, wherein

The processing sending module is further configured to: when determining that a subframe index of the transmitting SRS subframe set by the base station satisfies a relationship between the indication precoding SRS period and a subframe offset, send the precoded SRS; otherwise, send the non Precoded SRS.
The terminal device according to claim 29, wherein said precoding enable indication letter The information also includes: indication information of the precoding matrix index.
The terminal device according to claim 37, wherein when said precoding enable indication information includes indication information of a precoding matrix index,

The processing and sending module is configured to: when the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a unit array, send the non-precoded SRS; and determine the precoding matrix index indication that the base station configures to the terminal device When the coding matrix is a non-unit matrix, the pre-coded SRS is transmitted.
A transmitting system for measuring a reference signal SRS, wherein the system comprises: the base station according to any one of claims 20-28 and the terminal device according to any one of claims 29-38.
A storage medium storing a computer program configured to execute the transmission method of the measurement reference signal SRS according to any one of claims 1 to 19.