WO2017076162A1 - Sounding reference signal (srs) processing method and apparatus - Google Patents

Abstract

The present invention provides a sounding reference signal (SRS) processing method and an apparatus. The method comprises: a terminal sends an SRS from N antennas in turn, wherein N≥2, and SRS comprises an aperiodic SRS. The present invention resolves the problem of a long delay of SRS sending in the related technologies, and reduces the SRS sending delay

Description

Measurement reference signal SRS processing method and device Technical field

The present invention relates to the field of communications, and in particular to a method and apparatus for processing a Sounding Reference Signal (SRS).

Background technique

In the Long Term Evolution (LTE) system, the Physical Downlink Control Channel (PDCCH) is used to carry uplink and downlink scheduling information and uplink power control information. The Downlink Control Information (DCI) format is divided into DCI formats 0, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, and the like. A base station (e-Node-B, hereinafter referred to as an eNB) may configure a terminal device (User Equipment, UE for short) through downlink control information, or a terminal device may receive a higher layer configuration, which is also configured by using high layer signaling. UE.

In the LTE system, the measurement reference signal SRS is a signal used by the terminal device and the 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 frequency domain, SRS transmission needs to cover the frequency band of interest in the frequency domain. This can be achieved in two ways: one by covering a whole band by transmitting a sufficiently large wideband SRS; the other is by transmitting multiple narrowband SRSs. And hopping in the frequency domain, and then combining a series of sent SRSs, can cover the entire 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, within a certain SRS bandwidth The UE that sends the SRS can use 8 cyclic shifts and 2 frequency combs that can be used. Therefore, the UE has a total of 16 resources that can be used to transmit SRS. That is, within this SRS bandwidth, Send 16 SRSs at the same time. Since the LTE system does not support Single User Multiple Input Multiple Output (SU-MIMO), the UE can only transmit one SRS at each time, so only one SRS resource is required for one UE. . Therefore, within the above SRS bandwidth, the system can simultaneously multiplex up to 16 UEs.

In LTE, up to two antennas can be used as the uplink transmit antenna. LTE supports two antenna users to transmit SRS by using the antenna selection function, that is, two antenna SRS switching transmission. For the specified SRS bandwidth, the UE transmits the SRS on only one antenna at the same time, and the two antennas transmit the SRS in turn to complete the channel quality information detection of the two antenna SRS.

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.

In the LTE-A study, it is proposed that in uplink communication, non-pre-coded (ie antenna-specific) SRS should be used. 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. In addition, the SRS transmission delay caused by the four-antenna SRS handover transmission will be twice that of the two antennas.

In view of the problem of prolonged SRS transmission in the related art, an effective solution has not been proposed yet.

Summary of the invention

The embodiment of the invention provides a method and a device for processing a reference signal SRS, so as to at least solve the problem that the SRS is extended in the related art.

According to an aspect of the embodiments of the present invention, a method for processing a measurement reference signal SRS is provided, including: a terminal transmitting an SRS in turn from N antennas, where N≥2, the SRS includes: Aperiodic SRS.

Optionally, before the terminal sends the SRS in turn from the N antennas, the method further includes: the terminal receiving downlink control information sent by the base station, where the downlink control information is used to request the terminal to send the non- Cycle SRS.

Optionally, the downlink control information includes multiple first downlink control information used to trigger the terminal to perform one aperiodic SRS transmission; and/or the downlink control information includes one used to trigger the terminal to perform multiple Second downlink control information sent by the secondary consecutive aperiodic SRS.

Optionally, in a case that the downlink control information includes the multiple first downlink control information, the sending, by the terminal, the SRS by using the N antennas in turn includes: the terminal according to the multiple And transmitting, by the N antennas, the aperiodic SRS by using a transmit antenna index specified by a downlink control information or a high layer signaling; and the downlink control information includes a non-periodic SRS for triggering the terminal to perform multiple consecutive times. In the case of the second downlink control information that is sent, the terminal transmitting the SRS from the N antennas in turn includes: when the aperiodic SRS is sent for the first time, the terminal is configured according to the second downlink control information or a high layer Sending the aperiodic SRS according to the specified transmit antenna index, or transmitting the aperiodic SRS according to the default transmit antenna index, the terminal determines the transmit antenna index according to the number of sent aperiodic SRSs according to the determined The transmit antenna index transmits the aperiodic SRS.

Optionally, the downlink control information is further used to indicate whether the terminal sends the aperiodic SRS in turn from the N antennas, where the terminal indicates, if the downlink control information is yes, The N antennas transmit the aperiodic SRS in turn.

Optionally, the transmitting, by the terminal, the SRS from the N antennas in turn comprises: transmitting, by the terminal, the N antennas in turn on the subframes and/or symbols used to send the aperiodic SRS. Aperiodic SRS.

Optionally, the SRS further includes a periodic SRS, and the terminal transmitting the SRS from the N antennas in turn comprises: the terminal from the subframe and/or symbol used to send the periodic SRS from the The N antennas transmit the periodic SRS in turn, and transmit the aperiodic SRS in turn from the N antennas on subframes and/or symbols used to transmit the aperiodic SRS.

Optionally, the subframe and/or symbol includes: an uplink pilot time slot UpPTS symbol of a special subframe in a time division duplex TDD system.

Optionally, the UpPTS symbol of the special subframe includes: N UpPTS symbols in one special subframe; or N UpPTS symbols in two consecutive special subframes, where the two special subframes The first special subframe includes A UpPTS symbols for transmitting the SRS, and the second special subframe includes NA UpPTS symbols for transmitting the SRS, 1≤A<N.

Optionally, the subframe and/or the symbol are notified by the base station to the terminal by using downlink control information and/or high layer signaling.

Optionally, the transmitting, by the terminal, the SRS from the N antennas in turn comprises: transmitting, by the terminal, the N antennas in turn according to downlink control information sent by a base station or antenna index information notified by a high layer signaling. SRS.

Optionally, the SRS further includes a periodic SRS, and the terminal transmitting the SRS by using the N antennas in turn comprises: determining, by the terminal, an antenna index for sending the SRS according to the number of SRS transmissions, and determining, according to the determined The antenna index transmits the SRS on a corresponding antenna, where the number of SRS transmissions is the sum of the number of non-periodic SRS transmissions and the number of periodic SRS transmissions.

Optionally, the SRS further includes a periodic SRS, and the terminal transmitting the SRS by using the N antennas in turn comprises: determining, by the terminal, an antenna index for sending the periodic SRS according to a periodic SRS transmission number, and according to And determining, by the determined antenna index, the periodic SRS on the corresponding antenna; and/or determining, by the terminal, the aperiodic SRS according to the number of non-periodic SRS transmissions or the downlink control information or the high layer signaling sent by the base station. An antenna index, and transmitting the aperiodic SRS on the corresponding antenna according to the determined antenna index.

Optionally, the SRS further includes a periodic SRS, where the SRS frequency domain hopping function is enabled: after the aperiodic SRS transmission, the frequency domain location of the periodic SRS before the next aperiodic SRS transmission The frequency hopping subband is cyclically shifted backward; or, after the aperiodic SRS transmission, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission remains unchanged.

Optionally, before the terminal sends the SRS in turn from the N antennas, the method further includes: receiving, by the terminal, downlink control information and/or high layer signaling sent by the base station, and according to the downlink control information and The indication of the high-level signaling is to cyclically shift the frequency domain position of the periodic SRS by one hop subband; or the terminal determines that the terminal has sent the request for sending the terminal. In the case of the aperiodic SRS and instructing the terminal to transmit the downlink control information and/or the high layer signaling of the aperiodic SRS in turn from the N antennas, the frequency domain position of the periodic SRS is cyclically shifted backward a frequency hopping subband; or the terminal receives the downlink control information and/or the high layer signaling sent by the base station, and sets the frequency domain of the periodic SRS according to the indication of the downlink control information and/or the high layer signaling The terminal remains unchanged; or the terminal determines that the terminal has sent the request to send the aperiodic SRS, and the terminal instructs the terminal to transmit the aperiodic from the N antennas in turn. Downlink control information of SRS and / In the case of high-level signaling, the SRS frequency domain position of the cycle remain unchanged.

Alternatively, N=2 or 4 or 8.

According to another aspect of the present invention, a method for processing a measurement reference signal SRS is further provided, comprising: receiving, by a base station, SRSs transmitted by a terminal from N antennas, wherein N≥2, the SRS comprises: aperiodic SRS.

Optionally, before the receiving, by the base station, the SRS that is sent by the terminal from the N antennas, the method further includes: sending, by the base station, downlink control information to the terminal, where the downlink control information is used by And instructing the terminal to send the aperiodic SRS.

Optionally, the downlink control information includes multiple first downlink control information used to trigger the terminal to perform one aperiodic SRS transmission; and/or the downlink control information includes one used to trigger the terminal to perform multiple Second downlink control information sent by the secondary consecutive aperiodic SRS.

Optionally, the downlink control information is further used to indicate whether the terminal sends the aperiodic SRS in turn from the N antennas, where, in case the downlink control information indicates yes, the terminal The N antennas transmit the aperiodic SRS in turn.

Optionally, the receiving, by the base station, the SRS that is sent by the terminal from the N antennas in turn comprises: receiving, by the base station, a subframe that is used by the terminal to send the aperiodic SRS and/or Or the aperiodic SRS transmitted in turn from the N antennas.

Optionally, the SRS further includes a periodic SRS, and the receiving, by the base station, the SRS that is sent by the terminal from the N antennas comprises: receiving, by the base station, the terminal is used to send the periodic SRS. The periodic SRS transmitted from the N antennas on a subframe and/or a symbol, and receiving the terminal to rotate from the N antennas on a subframe and/or a symbol for transmitting the aperiodic SRS The aperiodic SRS sent.

Optionally, the subframe and/or symbol includes: an uplink pilot time slot UpPTS symbol of a special subframe in a time division duplex TDD system.

Optionally, the UpPTS symbol of the special subframe includes: N UpPTS symbols in one special subframe; or N UpPTS symbols in two consecutive special subframes, where the two special subframes The first special subframe includes A UpPTS symbols for transmitting the SRS, and the second special subframe includes NA UpPTS symbols for transmitting the SRS, 1≤A<N.

Optionally, before the receiving, by the base station, the SRS that is sent by the terminal from the N antennas, the base station further includes: the base station, by using downlink control information and/or high layer signaling, the subframe and/or Or the symbol is notified to the terminal.

Optionally, before the receiving, by the base station, the SRS that is sent by the terminal from the N antennas, the method further includes: sending, by the base station, downlink control information and/or high layer signaling to the terminal; The downlink control information and/or the high layer signaling is used to notify the terminal to transmit antenna index information of the SRS in turn from the N antennas; and/or further include a periodic SRS in the SRS, and In the case that the SRS frequency domain frequency hopping function is enabled, the downlink control information and/or the high layer signaling is used to indicate that the terminal is sent after the aperiodic SRS transmission after the aperiodic SRS transmission. The frequency domain position of the periodic SRS is cyclically shifted by one hop subband, or used to indicate the frequency domain of the periodic SRS before the next aperiodic SRS transmission by the terminal after the aperiodic SRS transmission. The location remains the same.

Alternatively, N=2 or 4 or 8.

According to another aspect of the present invention, there is also provided a measurement reference signal SRS processing apparatus, The application to the terminal includes: a first sending module, configured to transmit SRSs from the N antennas in turn, where N≥2, the SRS includes: aperiodic SRS.

Optionally, the device further includes: a first receiving module, configured to receive downlink control information sent by the base station, where the downlink control information is used to request the terminal to send the aperiodic SRS.

Optionally, the first sending module is configured to: send the aperiodic SRS in turn from the N antennas on a subframe and/or a symbol used to send the aperiodic SRS.

Optionally, the first sending module is configured to: periodically send the periodic SRS from the N antennas on a subframe and/or a symbol used to send the periodic SRS, and The aperiodic SRS is transmitted in turn from the N antennas on subframes and/or symbols of the periodic SRS.

Optionally, the first sending module is configured to: send, according to the downlink control information sent by the base station or the antenna index information sent by the high layer signaling, the SRS from the N antennas.

Optionally, the first sending module is configured to: when the SRS further includes a periodic SRS, determine an antenna index for sending the SRS according to the number of SRS transmissions, and according to the determined antenna index, the corresponding antenna The SRS is sent, where the number of SRS transmissions is the sum of the number of non-periodic SRS transmissions and the number of periodic SRS transmissions.

Optionally, the first sending module is configured to: when the SRS further includes a periodic SRS, determine an antenna index used to send the periodic SRS according to a periodic SRS transmission number, and correspond according to the determined antenna index. And transmitting the periodic SRS on the antenna; and/or determining, according to the aperiodic SRS transmission times or the downlink control information or the high layer signaling sent by the base station, that the SRS is used to send the An antenna index of the aperiodic SRS, and transmitting the aperiodic SRS on the corresponding antenna according to the determined antenna index.

According to another aspect of the present invention, there is also provided a measurement reference signal SRS processing apparatus, which is applied to a base station, comprising: a second receiving module, configured to receive, by the terminal, SRSs transmitted in turn from N antennas, where N≥2 The SRS includes: an aperiodic SRS.

Optionally, the device further includes: a second sending module, configured to send downlink control to the terminal before the second receiving module receives the SRS that is sent by the terminal in turn from the N antennas Information, wherein the downlink control information is used to indicate that the terminal sends the location A non-periodic SRS.

Optionally, the second receiving module is configured to: receive the aperiodic SRS that is sent by the terminal in turn from the N antennas on a subframe and/or a symbol used to send the aperiodic SRS.

Optionally, the second receiving module is configured to: when the SRS further includes a periodic SRS, receive the terminal from the N subframes and/or symbols used to send the periodic SRS And transmitting, by the antenna, the periodic SRS, and receiving, by the terminal, the aperiodic SRS that is sent in turn from the N antennas on a subframe and/or a symbol used to send the aperiodic SRS.

Optionally, the apparatus further includes: a notification module, configured to notify the terminal by using the downlink control information and/or the high layer signaling.

Optionally, the device further includes: a third sending module, configured to send downlink control information and/or high layer signaling to the terminal; where the downlink control information and/or the high layer signaling is used for notification The terminal is configured to transmit the antenna index information of the SRS in turn from the N antennas; and/or in a case where the SRS further includes a periodic SRS, and the SRS frequency domain frequency hopping function is enabled, The downlink control information and/or the high layer signaling is used to indicate that the terminal cyclically shifts a frequency hopping frequency of the periodic SRS before the next aperiodic SRS transmission after the aperiodic SRS transmission. The subband, or used to indicate that the frequency domain position of the periodic SRS before the next aperiodic SRS transmission remains unchanged after the aperiodic SRS transmission by the terminal.

With the solution provided by the embodiment of the present invention, the terminal uses the terminal to transmit the SRS from the N antennas, where N≥2, and the SRS includes the non-periodic SRS mode, which solves the problem of prolonging the SRS transmission in the related art, and reduces the SRS. Send delay.

DRAWINGS

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

1 is a flowchart 1 of a method for processing a measurement reference signal SRS according to an embodiment of the present invention;

2 is an optional flowchart 1 of a method for processing a measurement reference signal SRS according to an embodiment of the present invention;

3 is a second flowchart of a method for processing a measurement reference signal SRS according to an embodiment of the present invention;

4 is an optional flowchart 2 of a method for processing a measurement reference signal SRS according to an embodiment of the present invention;

5 is a structural block diagram 1 of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention;

6 is a block diagram 1 of an optional structure of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention;

7 is a structural block diagram 2 of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention;

8 is a block diagram 2 of an optional structure of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention;

9 is a first schematic diagram of an UpPTS of a method for measuring a reference signal SRS according to an alternative embodiment of the present invention;

10 is a second schematic diagram of an UpPTS of a method for measuring a reference signal SRS according to an alternative embodiment of the present invention;

11 is a schematic diagram of a subframe of a method for measuring a reference signal SRS according to an alternative embodiment of the present invention;

FIG. 12 is a first schematic diagram of a frequency hopping transmission SRS of a method for measuring a reference signal SRS according to an alternative embodiment of the present invention; FIG.

FIG. 13 is a second schematic diagram of a frequency hopping transmission SRS of a measurement reference signal SRS processing method according to an alternative embodiment of the present invention.

detailed description

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

It should be noted that the descriptions and claims of the present invention and the terms in the above drawings "First", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

In this embodiment, a method for processing a measurement reference signal SRS is provided. FIG. 1 is a flowchart 1 of a method for processing a measurement reference signal SRS according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102: The terminal transmits the SRS in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS (abbreviated as A-SRS).

Through the above steps, the terminal sends aperiodic SRS on multiple antennas in turn. Since the transmitted SRS is aperiodic, the SRS transmission time can be controlled. By reasonably scheduling the transmission of the aperiodic SRS, the transmission delay can be realized. control. It can be seen that the above steps solve the problem of prolonging the SRS transmission in the related art, and reduce the transmission delay of the SRS.

FIG. 2 is an optional flowchart 1 of a method for processing a measurement reference signal SRS according to an embodiment of the present invention. Optionally, as shown in FIG. 2, the process includes the following steps:

Step S100: The terminal receives downlink control information that is sent by the base station and is used to request the terminal to send the aperiodic SRS.

Step S102: The terminal transmits the SRS in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS.

Optionally, the downlink control information may include multiple first downlink control information for triggering the terminal to perform one aperiodic SRS transmission; the downlink control information may also include one for triggering the terminal to perform multiple consecutive aperiodic SRS transmissions. Second downlink control information.

The following describes respectively how the terminal transmits the aperiodic SRS in turn from the N antennas when the downlink control information includes one or more trigger information.

For example, in a case where the downlink control information includes the plurality of first downlink control information, the terminal may transmit the aperiodic SRS in turn from the N antennas according to the plurality of first downlink control information or the transmit antenna index specified by the high layer signaling.

In example 2, the downlink control information includes a non-period for triggering the terminal to perform multiple consecutive times. In the case of the second downlink control information sent by the SRS, when the aperiodic SRS is sent for the first time, the terminal may send the aperiodic SRS according to the second downlink control information or the transmit antenna index specified by the high layer signaling, or according to the default transmit antenna index. When transmitting the aperiodic SRS, the terminal may determine the transmit antenna index according to the number of transmitted aperiodic SRSs and transmit the aperiodic SRS according to the determined transmit antenna index.

Optionally, the downlink control information may be further used to indicate whether the terminal sends the aperiodic SRS in turn from the N antennas, and the terminal may transmit the aperiodic SRS in turn from the N antennas if the downlink control information indicates yes.

Optionally, in the foregoing step S102, the terminal may transmit the aperiodic SRS in turn from the N antennas on the subframes and/or symbols used for transmitting the aperiodic SRS.

Optionally, in a case where the SRS further includes a periodic SRS (Periodic SRS, abbreviated as P-SRS), in the foregoing step S102, the terminal may use N antennas on the subframe and/or symbol used for transmitting the periodic SRS. The periodic SRS is transmitted in turn, and the aperiodic SRS is transmitted in turn from the N antennas on the subframes and/or symbols used to transmit the aperiodic SRS. Through the above steps, the terminal can send the aperiodic SRS between the sending processes of the periodic SRS, so that the number of SRSs sent in the same time is increased, which solves the problem of prolonging the SRS transmission in the related art, and reduces the sending time of the SRS. Delay.

Optionally, the subframe and/or the symbol may include: an uplink pilot time slot UpPTS symbol of the special subframe in the time division duplex TDD system, where the UpPTS symbol of the special subframe may include: N in a special subframe UpPTS symbol; or N UpPTS symbols in two consecutive special subframes, wherein, among the two special subframes, the first special subframe includes A UpPTS symbols for transmitting SRS, and the second special sub- The frame includes NA UpPTS symbols for transmitting SRS, 1≤A<N.

Optionally, the subframe and/or the symbol may be notified to the terminal by the base station by using downlink control information and/or higher layer signaling.

Optionally, in the foregoing step S102, the terminal may transmit the SRS in turn from the N antennas according to the downlink control information sent by the base station or the antenna index information notified by the high layer signaling.

Optionally, in the case that the SRS further includes the periodic SRS, in the foregoing step S102, the terminal may determine an antenna index for transmitting the SRS according to the number of SRS transmissions, and send the SRS on the corresponding antenna according to the determined antenna index, where The number of SRS transmissions is the sum of the number of non-periodic SRS transmissions and the number of periodic SRS transmissions.

Optionally, in the case that the SRS further includes a periodic SRS, in the foregoing step S102, the terminal may determine an antenna index for sending the periodic SRS according to the number of periodic SRS transmissions, and send a period on the corresponding antenna according to the determined antenna index. SRS;

In the case that the SRS further includes the periodic SRS, the terminal may also determine an antenna index for transmitting the aperiodic SRS according to the number of non-periodic SRS transmissions or the downlink control information or the higher layer signaling sent by the base station, and according to the determined antenna index. Aperiodic SRS is transmitted on the corresponding antenna.

Optionally, in the case that the SRS further includes a periodic SRS, and the SRS frequency domain frequency hopping function is enabled, after the aperiodic SRS transmission, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission may be cyclically backward. Bit one hop subband. As an optional implementation manner, the frequency domain position after cyclically shifting one hop subband may be i'=(i+1) modK, where i is the original frequency domain position of the periodic SRS, K To allow the number of subbands to be frequency hopped, for example, the number of subbands that allow frequency hopping is 4, and the aperiodic SRS is transmitted on the third subband (subband 2), then the fourth subband (subband 3) The frequency domain position of the upper periodic SRS is moved to i'=(4+1) mod4=1, that is, the first subband (subband 0) is sent on the fourth subband (subband 3). Cycle SRS.

Optionally, in the case that the SRS further includes a periodic SRS, and the SRS frequency domain frequency hopping function is enabled, after the aperiodic SRS transmission, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission may remain unchanged.

The terminal may determine the frequency domain position of the periodic SRS before the next aperiodic SRS transmission after the aperiodic SRS transmission, in the case that the SRS further includes the periodic SRS and the SRS frequency domain frequency hopping function is enabled in the following two ways:

Manner 1: The terminal can receive the downlink control information and/or the high layer signaling sent by the base station, and cyclically shift the frequency domain position of the periodic SRS according to the indication of the downlink control information and/or the high layer signaling. One hop subband; or,

The terminal may receive the downlink control information and/or the high layer signaling sent by the base station, and keep the frequency domain position of the periodic SRS unchanged according to the indication of the downlink control information and/or the high layer signaling.

Manner 2: The terminal may determine that the terminal has received the downlink control information and/or the high layer signaling that is sent by the base station to request the terminal to send the aperiodic SRS and instruct the terminal to transmit the aperiodic SRS from the N antennas in turn. The frequency domain position of the SRS is cyclically shifted backward by one frequency hop subband; or

The terminal may determine the frequency of the periodic SRS when it is determined that the terminal has received the downlink control information and/or the high layer signaling that is sent by the base station to request the terminal to send the aperiodic SRS and instruct the terminal to transmit the aperiodic SRS from the N antennas in turn. The domain location remains the same.

Alternatively, the number N of antennas may be 2 or 4 or 8.

The following takes the 4 antennas to transmit SRS in turn as an example to illustrate the process in which the terminal transmits SRS in turn on N antennas.

The terminal may transmit the SRS in turn on the first antenna, the second antenna, the third antenna, and the fourth antenna, where the SRS includes a periodic SRS and/or an aperiodic SRS.

The terminal may also send the SRS on the UpPTS symbol of the special subframe in the TDD system;

The SRS sent by the terminal on the UpPTS symbol of the special subframe in the TDD system may be an aperiodic SRS.

For example, the terminal may configure four UpPTS symbols of a special subframe for transmitting the SRS, where the first antenna, the second antenna, the third antenna, and the fourth antenna are respectively in the first UpPTS symbol, the second UpPTS symbol, and the third UpPTS. Sending an SRS on the symbol and the fourth UpPTS symbol;

The terminal may also configure four UpPTS symbols of two consecutive special subframes for transmitting the SRS, where two UpPTS symbols are configured in each special subframe for transmitting the SRS, where the first antenna and the second antenna are respectively in the first SRS is sent in two UpPTSs of the special subframe, and the third antenna and the fourth antenna respectively send SRSs in two UpPTSs of the second special subframe;

The terminal may determine, by receiving high layer signaling, a special subframe for sending the SRS. UpPTS symbol.

Before the terminal sends the SRS, the terminal may trigger two or four UpPTS symbols in the special subframe to send the aperiodic SRS by receiving the downlink control information.

The terminal may transmit the SRS in turn from the first antenna, the second antenna, the third antenna, and the fourth antenna on the subframes and/or symbols that can be used to send the periodic SRS and the aperiodic SRS;

The antenna index transmitted on the subframe and/or the symbol that can be used for transmitting the SRS is related to the value of the SRS transmission number counter, and the SRS transmission number counter can count the transmission of the periodic SRS and the aperiodic SRS.

In the case that the SRS frequency domain frequency hopping function is enabled, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission after the aperiodic SRS transmission is uniformly cyclically shifted by one hopping subband position.

The terminal may also support multiple consecutive A-SRS transmissions by using one downlink control information, and the antenna index of the first A-SRS transmission is the fourth antenna index or configured by the downlink control information or the high layer signaling to the terminal, and the remaining A- The antenna index sent by the SRS is related to the value of the counter of the aperiodic SRS; wherein the antenna index information used for transmitting the A-SRS may be notified to the terminal by downlink control information or higher layer signaling.

In this embodiment, a method for processing a measurement reference signal SRS is also provided. FIG. 3 is a second flowchart of a method for processing a measurement reference signal SRS according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:

Step S302: The base station receives an SRS that is sent by the terminal in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS.

Through the above steps, the base station can receive the aperiodic SRS that the terminal sends in turn on multiple antennas. Since the SRS sent by the terminal is aperiodic, the SRS transmission time can be controlled. It can be seen that the above steps solve the problem of prolonging the SRS transmission in the related art, and reduce the transmission delay of the SRS.

FIG. 4 is an optional flowchart 2 of a method for processing a measurement reference signal SRS according to an embodiment of the present invention. Optionally, as shown in FIG. 4, the process includes the following steps:

Step S300, the base station sends downlink control information to the terminal, where the downlink control information is used to instruct the terminal to send the aperiodic SRS.

Step S302: The base station receives an SRS that is sent by the terminal in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS.

Optionally, the downlink control information may include multiple first downlink control information for triggering the terminal to perform one aperiodic SRS transmission; the downlink control information may also include a non-periodic SRS for triggering the terminal to perform multiple consecutive times. Sending the second downlink control information, where the downlink control information is further used to indicate whether the terminal sends the aperiodic SRS in turn from the N antennas, wherein, in the case that the downlink control information indication is yes, the terminal takes turns from the N antennas Send a non-periodic SRS.

Optionally, in the foregoing step S302, the base station may receive the aperiodic SRS that the terminal transmits in turn from the N antennas on the subframes and/or symbols used for transmitting the aperiodic SRS.

Optionally, in a case where the SRS further includes a periodic SRS, in the foregoing step S302, the base station may receive, by the terminal, a periodic SRS that is sent from the N antennas in a subframe and/or a symbol for transmitting the periodic SRS, and receive The aperiodic SRS that the terminal transmits in turn from the N antennas on the subframes and/or symbols used to transmit the aperiodic SRS.

The foregoing subframes and/or symbols may include: an uplink pilot time slot UpPTS symbol of a special subframe in a time division duplex TDD system, where the UpPTS symbol of the special subframe may include: N UpPTS symbols in a special subframe; Or N UpPTS symbols in two consecutive special subframes, wherein, among the two special subframes, the first special subframe includes A UpPTS symbols for transmitting SRS, and the second special subframe includes NA The UpPTS symbol used to transmit the SRS, 1 ≤ A < N.

Optionally, before the foregoing step S302, the base station may notify the terminal of the subframe and/or the symbol by using the downlink control information and/or the high layer signaling.

Optionally, before the foregoing step S302, the base station may send downlink control information and/or high layer signaling to the terminal;

The downlink control information and/or the high layer signaling may be used to notify the terminal to use N days. The line transmits the antenna index information of the SRS in turn;

In the case that the SRS further includes a periodic SRS, and the SRS frequency domain frequency hopping function is enabled, the downlink control information and/or the high layer signaling may be used to indicate the period of the terminal after the aperiodic SRS transmission, before the next aperiodic SRS transmission. The frequency domain position of the SRS is cyclically shifted by one hop subband, or may be used to indicate that the frequency domain position of the periodic SRS before the next aperiodic SRS transmission remains unchanged after the aperiodic SRS transmission.

Optionally, the SRS received by the base station may be sent by two antennas of the terminal, or may be sent by four antennas of the terminal.

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

In the embodiment, a measurement reference signal SRS processing device is also provided, which is applied to the terminal, and the device is used to implement the foregoing embodiment and the optional implementation manner, and the description has been omitted. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 5 is a structural block diagram 1 of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus includes: a first sending module 52 configured to transmit SRSs from N antennas in turn, where N≥ 2. SRS includes: aperiodic SRS.

FIG. 6 is a block diagram of an optional structure of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention. As shown in FIG. 6, the apparatus further includes: a first receiving module 62 coupled to the first sending module 52. And configured to receive downlink control information sent by the base station, where the downlink control information is set to request the terminal to send the aperiodic SRS.

Optionally, the downlink control information may include multiple first downlink control information for triggering the terminal to perform one aperiodic SRS transmission; the downlink control information may further include one for triggering the terminal to perform multiple consecutive aperiodic SRS transmissions. The second downlink control information.

Optionally, in a case that the downlink control information includes multiple first downlink control information, the terminal may transmit the aperiodic SRS in turn from the N antennas according to the plurality of first downlink control information or the transmit antenna index specified by the high layer signaling. ;

In the case that the downlink control information includes a second downlink control information for triggering the terminal to perform a plurality of consecutive aperiodic SRS transmissions, when the aperiodic SRS is sent for the first time, the terminal may specify according to the second downlink control information or the high layer signaling. The antenna index is transmitted, or the aperiodic SRS is sent according to the default transmit antenna index. When the aperiodic SRS is not sent for the first time, the terminal may determine the transmit antenna index according to the number of sent aperiodic SRSs and send the aperiodic SRS according to the determined transmit antenna index.

Optionally, the downlink control information may be further used to indicate whether the terminal sends the aperiodic SRS in turn from the N antennas, and the terminal sends the aperiodic SRS in turn from the N antennas if the downlink control information indicates yes.

Optionally, the first sending module 52 is configured to transmit the aperiodic SRS in turn from the N antennas on the subframes and/or symbols used to transmit the aperiodic SRS.

Optionally, the first sending module 52 is configured to: periodically transmit the periodic SRS from the N antennas on the subframes and/or symbols used to transmit the periodic SRS, and use the subframes and/or symbols used to transmit the aperiodic SRS. Aperiodic SRS is transmitted in turn from N antennas.

Optionally, the subframe and/or the symbol may include: an uplink pilot time slot UpPTS symbol of the special subframe in the time division duplex TDD system, where the UpPTS symbol of the special subframe may include: N in a special subframe UpPTS symbol; or N UpPTS symbols in two consecutive special subframes, wherein, among the two special subframes, the first special subframe includes A UpPTS symbols for transmitting SRS, and the second special sub- The frame includes NA UpPTS symbols for transmitting SRS, 1≤A<N.

Optionally, the subframe and/or the symbol may be downlink control information and/or higher layer signaling by the base station. Notify the terminal.

Optionally, the first sending module 52 is configured to: sequentially send the SRS from the N antennas according to the downlink control information sent by the base station or the antenna index information notified by the high layer signaling.

Optionally, the foregoing first sending module 52 is configured to: when the SRS further includes a periodic SRS, determine an antenna index for transmitting the SRS according to the number of SRS transmissions, and send the SRS on the corresponding antenna according to the determined antenna index, The SRS transmission times are the sum of the number of non-periodic SRS transmissions and the number of periodic SRS transmissions.

Optionally, the foregoing first sending module 52 is configured to: when the SRS further includes a periodic SRS, determine an antenna index for sending the periodic SRS according to the number of periodic SRS transmissions, and send the corresponding antenna according to the determined antenna index. a periodic SRS; and/or in the case that the SRS further includes a periodic SRS, determining an antenna index for transmitting the aperiodic SRS according to the number of aperiodic SRS transmissions or the downlink control information or the higher layer signaling sent by the base station, and determining according to the determination The antenna index transmits an aperiodic SRS on the corresponding antenna.

Optionally, in the case that the SRS further includes a periodic SRS, and the SRS frequency domain frequency hopping function is enabled, after the aperiodic SRS transmission, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission is cyclically shifted backward. One frequency hopping subband; or, after the aperiodic SRS transmission, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission remains unchanged.

Optionally, the first receiving module 62 is further configured to: receive downlink control information and/or high layer signaling sent by the base station, and forward the frequency domain of the periodic SRS backward according to the indication of the downlink control information and/or the high layer signaling. Cycling one hop subband; or determining downlink control information and/or higher layer signaling that is sent by the base station to request the terminal to send the aperiodic SRS and instruct the terminal to transmit the aperiodic SRS from the N antennas in turn. The frequency domain position of the periodic SRS is cyclically shifted by one hop subband; or the terminal receives the downlink control information and/or the high layer signaling sent by the base station, and according to the downlink control information and/or the high layer letter. The indication of the command keeps the frequency domain position of the periodic SRS unchanged; or the terminal determines that the terminal has sent the downlink control information that is sent by the base station to request the terminal to send the aperiodic SRS and instructs the terminal to transmit the aperiodic SRS from the N antennas in turn. In the case of high-level signaling, the frequency domain position of the periodic SRS remains unchanged.

Alternatively, the number N of antennas may be 2 or 4 or 8.

In this embodiment, a measurement reference signal SRS processing device is further provided, which is applied to a base station, and the device is used to implement the foregoing embodiments and optional implementation manners, and details have been omitted for description. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 7 is a block diagram showing the structure of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention. As shown in FIG. 7, the apparatus includes: a second receiving module 72 configured to receive an SRS transmitted by a terminal from N antennas in turn, Where N≥2, the SRS includes: aperiodic SRS.

FIG. 8 is a block diagram showing an optional structure of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus further includes: a second sending module 82 coupled to the second receiving module 72. And sending, to the terminal, downlink control information, where the downlink control information is used to instruct the terminal to send the aperiodic SRS.

Optionally, the downlink control information may include multiple first downlink control information for triggering the terminal to perform one aperiodic SRS transmission; the downlink control information may further include a non-periodic SRS for triggering the terminal to perform multiple consecutive times. The second downlink control information that is sent.

Optionally, the downlink control information may be further used to indicate whether the terminal sends the aperiodic SRS in turn from the N antennas, wherein the terminal sends the aperiodic SRS in turn from the N antennas if the downlink control information indicates yes.

Optionally, the foregoing second receiving module 72 is configured to: receive, by the receiving terminal, aperiodic SRS that is sent in turn from the N antennas on the subframe and/or symbol used for transmitting the aperiodic SRS.

Optionally, the foregoing second receiving module 72 is configured to: when the SRS further includes the periodic SRS, the receiving terminal periodically transmits the periodic SRS from the N antennas on the subframes and/or symbols used to send the periodic SRS, and The aperiodic SRS that the receiving terminal transmits in turn from the N antennas on the subframes and/or symbols used to transmit the aperiodic SRS.

Optionally, the subframe and/or the symbol may include: an uplink pilot time slot UpPTS symbol of the special subframe in the time division duplex TDD system, where the UpPTS symbol of the special subframe may include: N in a special subframe UpPTS symbol; or, N of two consecutive special subframes UpPTS symbol, wherein, among the two special subframes, the first special subframe includes A UpPTS symbols for transmitting SRS, and the second special subframe includes NA UpPTS symbols for transmitting SRS, 1≤A< N.

Optionally, the foregoing apparatus further includes: a notification module, coupled to the second receiving module 72, configured to notify the terminal of the subframe and/or the symbol by using downlink control information and/or high layer signaling.

Optionally, the foregoing apparatus may further include: a third sending module, coupled to the second receiving module 72, configured to send downlink control information and/or high layer signaling to the terminal; wherein the downlink control information and/or the high layer signaling may be Antenna index information for informing the terminal to transmit SRS in turn from N antennas; and/or downlink control information and/or higher layer signaling in case the SRS further includes a periodic SRS and the SRS frequency domain frequency hopping function is enabled It may be used to indicate that the terminal cyclically shifts one frequency hop subband after the aperiodic SRS transmission, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission, or is used to indicate that the terminal is in the aperiodic SRS. After transmission, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission remains unchanged.

Optionally, the SRS received by the foregoing apparatus may be sent by two antennas of the terminal, may be sent by four antennas of the terminal, or may be sent by eight antennas of the terminal.

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

Embodiments of the present invention also provide a software for performing the technical solutions described in the foregoing embodiments and optional embodiments.

Embodiments of the present invention also provide a storage medium. In this embodiment, the above storage medium may be configured to store program code for performing the following steps:

Step S102: The terminal transmits the SRS in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS.

Optionally, the storage medium is further arranged to store program code for performing the following steps:

Step S302: The base station receives an SRS that is sent by the terminal in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS.

Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM). A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

In order to make the description of the embodiments of the present invention more clear, the following description and description are made in conjunction with the exemplary embodiments.

An alternative embodiment of the present invention provides a four-antenna handover transmission method and apparatus supported by A-SRS.

According to an alternative embodiment of the present invention, a four-antenna handover transmission method supported by A-SRS is provided, and the UE may use high-level signaling (also referred to as triggering by trigger type 0) or downlink control information (also referred to as triggering by trigger type 1). The two types of triggering modes are SRS, which is triggered by the high-level signaling, and is triggered by the downlink control information, which is a non-periodic SRS. The method of sending SRS aperiodically improves the utilization of SRS resources and improves the flexibility of resource scheduling.

In the scenario of MIMO (Full Dimension-MIMO, FD-MIMO) or MIMO (Massive-MIMO) with a full-scale MIMO, Time Division Duplexing (TDD) channel reciprocity With the increase in the demand for SRS measurement and the increase in the number of multiplexed users, the existing SRS multiplexing capacity has become difficult to meet the demand. Enhancing the multiplexing capacity of the SRS by introducing aperiodic SRS handover transmission for four antennas also reduces the delay of SRS transmission.

The optional embodiments of the present invention are described below with reference to the accompanying drawings.

Alternative embodiment 1

FIG. 9 is a first schematic diagram of an UpPTS of a method for measuring a reference signal SRS according to an alternative embodiment of the present invention. As shown in FIG. 9, the terminal may configure four uplink pilot time slots of a special subframe (Uplink Pilot Time Slot, referred to as The UpPTS) symbol is used to transmit the A-SRS signal to the four antennas of the terminal, for example, the A-SRS signal is transmitted from the first antenna (TX1) of the terminal on the first UpPTS symbol, and the second UpPTS symbol is transmitted. Sending an A-SRS signal from the second antenna (TX2) of the terminal, from the third of the terminal on the third UpPTS symbol The A-SRS signal is transmitted on three antennas (TX3), and the A-SRS signal is transmitted from the fourth antenna (TX4) of the terminal on the fourth UpPTS symbol, wherein the A-SRS signal is a full bandwidth signal.

In the case that the UpPTS symbol in the special subframe is greater than four, the base station may indicate to the terminal which four symbols are used for the terminal to transmit the A-SRS by using the high layer signaling or the downlink control information configuration, and other UpPTSs. The symbol can be used for the terminal to send uplink data, or for other terminals to send SRS or A-SRS.

Before transmitting the A-SRS on the UpPTS symbol of the special subframe, the base station may send downlink control information to the terminal, for example, DCI format 0 or DCI format 4, and trigger the terminal to send A- on the UpPTS symbol of the latest special subframe. SRS. Optionally, the base station may send the downlink control information to the terminal to trigger the terminal to transmit the A-SRS from the four antennas of the terminal in turn on the designated four UpPTS symbols of the special subframe.

Alternative embodiment 2

FIG. 10 is a second schematic diagram of an UpPTS for measuring a reference signal SRS according to an alternative embodiment of the present invention. As shown in FIG. 10, a terminal may configure four UpPTS symbols of two special subframes for four antenna transmissions of the terminal. An A-SRS signal, wherein two UpPTS symbols for each special subframe are available for the terminal to transmit an A-SRS signal from two of the four antennas. For example, transmitting an A-SRS signal from the first antenna (TX1) of the terminal on the first UpPTS symbol of the first special subframe, from the second UpPTS symbol of the first special subframe. The A-SRS signal is transmitted on the second antenna (TX2) of the terminal, and the A-SRS signal is transmitted from the third antenna (TX3) of the terminal on the first UpPTS symbol of the second special subframe, in the second The A-SRS signal is transmitted from the fourth antenna (TX4) of the terminal on the second UpPTS symbol of the special subframe. Among them, the A-SRS signal is a full bandwidth signal.

In the case that the UpPTS symbol in each special subframe is greater than two, the base station may indicate to the terminal which of the two symbols for the terminal to transmit the A-SRS by using the higher layer signaling or the downlink control information configuration. The remaining UpPTS symbols can be used by the terminal to transmit uplink data or for other terminals to transmit SRS or A-SRS signals.

Before transmitting the A-SRS on the UpPTS symbol of the special subframe, the base station sends downlink control information, such as DCI format 0 or DCI format 4, to the terminal, and triggers the terminal to send the A-SRS on the UpPTS symbol of the latest special subframe. Optionally, the base station may send a downlink control information to the terminal before the special subframe to trigger the terminal to transmit on the two designated UpPTS symbols of the special subframe in turn from two antennas of the four antennas of the terminal. A-SRS.

Optionally, the base station may configure two sets of antenna subset information for the terminal by using high layer signaling, for example, one set is a set of TX1 and TX2, and the other set is a set of TX3 and TX4, and then the special subframe is triggered by the downlink control information. The two symbols are used to transmit A-SRS signals in turn from the antennas included in the two sets of antennas, wherein the configuration information of the A-SRS signals is controlled by high-level signaling or two-bit downlink in DCI format 4. Information is sent to the terminal. The antenna subset information can also be notified to the terminal through the two-bit downlink control information in the DCI format 4.

Alternative embodiment 3

The four-antenna SRS handover transmission of the terminal can simultaneously support the transmission of the periodic SRS and the aperiodic SRS on the periodic SRS and the aperiodic SRS subframe/symbol.

The two-antenna handover SRS in the existing protocol only supports the periodic SRS, and the determination of the transmit antenna index for transmitting the SRS on the periodic SRS subframe/symbol configured to the terminal is related to the value of the SRS transmission counter, that is, for the SRS hop. When the frequency is not enabled, a(n _SRS )=n _SRS mod2, when the SRS frequency hopping function is enabled,

among them

K is the number of subbands that allow SRS to hop.

11 is a schematic diagram of a subframe for measuring a reference signal SRS processing method according to an alternative embodiment of the present invention. As shown in FIG. 11, if the four antenna switching does not support A-SRS, the SRS counter is a conventional SRS counter, that is, only Count the periodic SRS. On different SRS transmission subframes/symbols, the terminal transmits SRS (Periodic SRS) on different antennas of the four antennas of the terminal in turn, assuming that in SRS four antenna switching, on each SRS transmission subframe/symbol The antenna index for transmitting the SRS is also related to the value of the SRS counter. For example, when the periodic SRS is transmitted for the first time, n _SRS =0, the terminal transmits the SRS from the first antenna TX1, and when the periodic SRS is transmitted for the second time. n _SRS =1, the terminal transmits the SRS from the second antenna TX2, and when the periodic SRS is transmitted for the third time, n _SRS = 2, the terminal transmits the SRS from the third antenna TX3, and the fourth transmission in the periodic SRS At the time n _SRS = 3, the terminal transmits the SRS from the fourth antenna TX4. Therefore, to support the SRS four-antenna switching support for transmitting aperiodic SRS, it is necessary to define a new transmission counter _n'SRS , which counts both the transmission of the periodic SRS of the terminal and also the aperiodic SRS of the terminal. The transmission is counted, for example n' _SRS = n _SRS + n _SRS1 . For example, as shown in FIG. 11, when the value of the SRS transmission counter is n' _SRS =0 at the time of the first transmission of the periodic SRS, the terminal transmits the SRS (periodic SRS) from the first antenna TX1, followed by the aperiodic SRS. When transmitting, the SRS transmission counter _n'SRS =1, the terminal transmits the SRS from the second antenna TX2, and then when the periodic SRS is transmitted for the second time _n'SRS = 2, the terminal transmits the SRS from the third antenna TX3. At the third transmission of the periodic SRS, _n'SRS = 3, and the terminal transmits the SRS from the fourth antenna TX4.

In addition, it is also possible that all A-SRSs of the terminal need to participate in four-antenna handover transmission. For example, before transmitting the A-SRS signal from the aperiodic SRS subframe/symbol, the base station requests the terminal to aperiodic through the downlink control signal. The transmission of the SRS simultaneously indicates to the terminal whether the aperiodic SRS is used for handover transmission of the four antennas of the terminal. In the case that the indication received by the terminal is that the aperiodic SRS does not participate in the handover transmission of the four antennas of the terminal, the terminal will transmit the aperiodic SRS on the antenna 0 by default.

Alternative embodiment four

In the case that the SRS frequency hopping function is enabled, the SRS four antenna switching needs to consider the SRS frequency hopping problem supported by the A-SRS.

It is assumed that the antenna index for transmitting the SRS is related to the counter of the SRS transmission. When the SRS frequency hopping function is enabled, once the A-SRS is triggered for SRS four antenna handover transmission, the A-SRS The frequency domain location is configured as the frequency domain location of the periodic SRS that is closest to the A-SRS, and the periodic SRS after the A-SRS is transmitted, and the frequency domain location of the frequency hopping is uniformly cyclically moved backward by one location.

For example, FIG. 12 is a first schematic diagram of a frequency hopping transmission SRS of a method for measuring a reference signal SRS according to an alternative embodiment of the present invention. As shown in FIG. 12, the first SRS transmission is performed by n' _SRS = n _SRS =0. SRS transmission, the frequency domain location is subband 0, the antenna index of the transmission period SRS is TX1, the second SRS transmission n' _SRS =n _SRS =1, is the periodic SRS transmission, the frequency domain position is subband 1, and the period is transmitted. The antenna index of the SRS is TX2, and the third SRS transmission is n' _SRS = n _SRS = 2, which is periodic SRS transmission, the frequency domain position is subband 2, the antenna index for transmitting the periodic SRS is TX3, and the fourth SRS transmission is n. ' _SRS =n _SRS =3, for aperiodic SRS transmission, the frequency domain position is the frequency domain position of the next periodic SRS transmission, ie, subband 3, and the antenna index for transmitting the aperiodic SRS is TX4, the next time after the A-SRS The frequency domain position of the periodic SRS transmission before the A-SRS transmission is uniformly cyclically shifted back by one sub-band position. For example, the sub-band position of the SRS transmission in the fourth period is shifted from the original sub-band 3 to the sub-band position to the sub-band position. 0, the sub-band position of the SRS transmission in the fifth cycle is shifted from the original sub-band 0 to the sub-band position. 1 becomes a sub-band, sub-band position of the sixth period of SRS transmission from the original sub-band with a rearward position to move a sub-sub-band 2, before the next A-SRS transmission, and so on.

Alternative embodiment five

When the SRS frequency hopping function is enabled, the SRS four antenna switching needs to consider the SRS frequency hopping problem supported by the A-SRS.

It is assumed that the number of transmissions of the periodic SRS and the aperiodic SRS is independently counted, that is, the counter of the periodic SRS transmission is n _SRS , and the counter of the non-periodic SRS transmission is n _SRS1 . The transmit antenna index of the periodic SRS is only related to the value of the counter n _SRS of the periodic SRS transmission, and the transmit antenna index of the aperiodic SRS is related to the value of the counter n _SRS1 of the aperiodic SRS transmission or directly notified to the terminal by signaling. At this time, the frequency domain hopping of the periodic SRS is not affected by the aperiodic SRS transmission. When a downlink control information of the base station can only trigger an aperiodic SRS transmission, the transmit antenna index of the aperiodic SRS can be indicated to the terminal by using downlink control information; when one downlink control information of the base station can trigger multiple consecutive non-transmissions During periodic SRS transmission, the first transmit antenna index of the aperiodic SRS is notified to the terminal by the downlink control information or higher layer signaling or is always the fourth transmit antenna, and is transmitted in the subsequent transmission of the aperiodic SRS triggered by the downlink control information. The antenna index used is related to the value of the counter n _SRS1 of the aperiodic SRS transmission.

For example, FIG. 13 is a schematic diagram 2 of a frequency hopping transmission SRS of a method for measuring a reference signal SRS according to an alternative embodiment of the present invention. As shown in FIG. 13, in a periodic SRS transmission, a counter associated with a periodic SRS is n _SRS , The terminal transmits the SRS signals in turn from the four antennas respectively, for example, the antenna index used in the nth _SRS sub-period SRS transmission is

among them,

K is the number of subbands that allow SRS to hop. Between the transmission of the SRS in the third and fourth periodic periods, the terminal transmits an A-SRS once, the counter n _{SRS1 of the} A-SRS is 0 at this time, and the frequency domain position of the A-SRS is configured as subband 0, and is sent. The antenna index of the A-SRS is configured as a fourth antenna TX4. In the subsequent three A-SRS transmissions, the frequency domain positions respectively occupy different sub-band positions of the SRS, and the antenna index may be configured by high-level signaling or downlink control information. It can also be determined by the value of the counter n _SRS1 of the A-SRS, for example

In this way, one round of SRS four-antenna switching transmission can be completed in 4K SRS transmissions (including periodic SRS transmission and aperiodic SRS transmission), that is, uplink/downlink on four antennas over the entire bandwidth can be obtained. Channel status information.

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

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

Industrial applicability

With the solution provided by the embodiment of the present invention, the terminal uses the terminal to transmit the SRS from the N antennas, where N≥2, and the SRS includes the non-periodic SRS mode, which solves the problem of prolonging the SRS transmission in the related art, and reduces the SRS. Send delay.

Claims (40)

1. A method for measuring a reference signal SRS, comprising:

   The terminal transmits the SRS in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS.
2. The method of claim 1, wherein before the terminal transmits the SRS in turn from the N antennas, the method further includes:

   The terminal receives the downlink control information sent by the base station, where the downlink control information is used to request the terminal to send the aperiodic SRS.
3. The method of claim 2, wherein

   The downlink control information includes a plurality of first downlink control information used to trigger the terminal to perform an aperiodic SRS transmission; and/or

   The downlink control information includes a second downlink control information for triggering the terminal to perform a plurality of consecutive aperiodic SRS transmissions.
4. The method of claim 3, wherein

   In the case that the downlink control information includes the multiple first downlink control information, the terminal transmitting the SRS from the N antennas in turn comprises: the terminal according to the multiple first downlink controls Transmitting or transmitting the aperiodic SRS in turn from the N antennas by a transmit antenna index specified by the information or higher layer signaling;

   In the case that the downlink control information includes a second downlink control information for triggering the terminal to perform a plurality of consecutive aperiodic SRS transmissions, the terminal transmitting the SRS from the N antennas in turn includes: When the aperiodic SRS is sent, the terminal sends the aperiodic SRS according to the transmit antenna index specified by the second downlink control information or high layer signaling, or according to a default transmit antenna index; the aperiodic SRS is not sent for the first time. The terminal determines a transmit antenna index according to the number of transmitted aperiodic SRSs and transmits the aperiodic SRS according to the determined transmit antenna index.
5. The method according to claim 2, wherein the downlink control information is further used to indicate whether the terminal sends the aperiodic SRS in turn from the N antennas, and the terminal indicates that the downlink control information is In the case, the aperiodic SRS is transmitted in turn from the N antennas.
6. The method of claim 1, wherein the transmitting, by the terminal, the SRS from the N antennas in turn comprises:

   The terminal transmits the aperiodic SRS in turn from the N antennas on a subframe and/or a symbol for transmitting the aperiodic SRS.
7. The method of claim 1, wherein the SRS further comprises a periodic SRS, and the transmitting, by the terminal, the SRS from the N antennas in turn comprises:

   Transmitting, by the terminal, the periodic SRS from the N antennas on a subframe and/or a symbol for transmitting the periodic SRS, and on a subframe and/or a symbol for transmitting the aperiodic SRS The aperiodic SRS is transmitted in turn from the N antennas.
8. The method according to claim 6 or 7, wherein the subframe and/or symbol comprises: an uplink pilot time slot UpPTS symbol of a special subframe in a time division duplex TDD system.
9. The method of claim 8, wherein the UpPTS symbol of the special subframe comprises:

   N UpPTS symbols in a special subframe; or,

   N UpPTS symbols in two consecutive special subframes, wherein, among the two special subframes, the first special subframe includes A UpPTS symbols for transmitting the SRS, and a second special subframe The NA includes UpPTS symbols for transmitting the SRS, 1≤A<N.
10. The method according to any one of claims 6 to 9, wherein the subframe and/or symbol are notified to the terminal by the base station by using downlink control information and/or higher layer signaling.
11. The method of claim 1 wherein said terminal is from said N days The linear transmission of the SRS includes:

    The terminal sends the SRS in turn from the N antennas according to downlink control information sent by the base station or antenna index information notified by the high layer signaling.
12. The method of claim 1, wherein the SRS further comprises a periodic SRS, and the transmitting, by the terminal, the SRS from the N antennas in turn comprises:

    Determining, by the terminal, an antenna index for transmitting the SRS according to the number of SRS transmissions, and transmitting the SRS on a corresponding antenna according to the determined antenna index, where the SRS transmission times are aperiodic SRS transmission times and periodic SRSs The sum of the number of transmissions.
13. The method of claim 1, wherein the SRS further comprises a periodic SRS, and the transmitting, by the terminal, the SRS from the N antennas in turn comprises:

    Determining, by the terminal, an antenna index for transmitting the periodic SRS according to the number of periodic SRS transmissions, and transmitting the periodic SRS on the corresponding antenna according to the determined antenna index; and/or

    Determining, by the terminal, the antenna index used to send the aperiodic SRS according to the number of non-periodic SRS transmissions or the downlink control information or the high layer signaling sent by the base station, and transmitting the antenna identifier on the corresponding antenna according to the determined antenna index. Aperiodic SRS.
14. The method of claim 1, wherein the SRS further comprises a periodic SRS, in the case that the SRS frequency domain frequency hopping function is enabled:

    After the aperiodic SRS transmission, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission is cyclically shifted by one frequency hop subband; or

    After the aperiodic SRS transmission, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission remains unchanged.
15. The method of claim 14, wherein before the terminal transmits the SRS in turn from the N antennas, the method further includes:

    Receiving, by the terminal, downlink control information and/or high layer signaling delivered by the base station, and according to the Deriving the downlink control information and/or the high layer signaling to cyclically shift the frequency domain position of the periodic SRS backward by one frequency hop subband; or

    Determining, by the terminal, the downlink control information that is sent by the base station to request the terminal to send the aperiodic SRS, and instructing the terminal to transmit the aperiodic SRS from the N antennas in turn and/or Or, in the case of high layer signaling, shifting the frequency domain position of the periodic SRS backward by one frequency hop subband; or

    The terminal receives the downlink control information and/or the high layer signaling sent by the base station, and keeps the frequency domain position of the periodic SRS unchanged according to the indication of the downlink control information and/or the high layer signaling; or

    Determining, by the terminal, the downlink control information that is sent by the base station to request the terminal to send the aperiodic SRS, and instructing the terminal to transmit the aperiodic SRS from the N antennas in turn and/or In the case of high layer signaling, the frequency domain position of the periodic SRS is kept unchanged.
16. The method according to any one of claims 1 to 15, wherein N = 2 or 4 or 8.
17. A method for measuring a reference signal SRS, comprising:

    The base station receives the SRS transmitted by the terminal in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS.
18. The method according to claim 17, wherein before the receiving, by the base station, the SRS that is sent by the terminal in turn from the N antennas, the method further includes:

    The base station sends downlink control information to the terminal, where the downlink control information is used to request the terminal to send the aperiodic SRS.
19. The method of claim 18, wherein

    The downlink control information includes a plurality of first downlink control information used to trigger the terminal to perform an aperiodic SRS transmission; and/or

    The downlink control information includes a second downlink control information for triggering the terminal to perform a plurality of consecutive aperiodic SRS transmissions.
20. The method according to claim 18, wherein the downlink control information is further used to indicate whether the terminal sends the aperiodic SRS in turn from the N antennas, wherein the downlink control information indicates yes In the case, the terminal transmits the aperiodic SRS in turn from the N antennas.
21. The method according to claim 17, wherein the receiving, by the base station, the SRS sent by the terminal in turn from the N antennas comprises:

    The base station receives the aperiodic SRS that the terminal transmits in turn from the N antennas on subframes and/or symbols used to transmit the aperiodic SRS.
22. The method of claim 17, wherein the SRS further comprises a periodic SRS, and the receiving, by the base station, the SRS sent by the terminal from the N antennas comprises:

    Receiving, by the base station, the periodic SRS that is sent by the terminal from the N antennas in a subframe and/or a symbol for transmitting the periodic SRS, and receiving the terminal to send the aperiodic The aperiodic SRS transmitted in turn from the N antennas on subframes and/or symbols of the SRS.
23. The method according to claim 21 or 22, wherein the subframe and/or symbol comprises: an uplink pilot time slot UpPTS symbol of a special subframe in a time division duplex TDD system.
24. The method of claim 23, wherein the UpPTS symbol of the special subframe comprises:

    N UpPTS symbols in a special subframe; or,

    N UpPTS symbols in two consecutive special subframes, wherein, among the two special subframes, the first special subframe includes A UpPTS symbols for transmitting the SRS, and a second special subframe The NA includes UpPTS symbols for transmitting the SRS, 1≤A<N.
25. The method according to any one of claims 21 to 24, further comprising: before the receiving, by the base station, the SRS that is sent by the terminal in turn from the N antennas,

    The base station notifies the terminal of the subframe and/or symbol by using downlink control information and/or higher layer signaling.
26. The method according to claim 17, wherein before the receiving, by the base station, the SRS that is sent by the terminal in turn from the N antennas, the method further includes:

    The base station sends downlink control information and/or high layer signaling to the terminal;

    The downlink control information and/or the high layer signaling is used to notify the terminal to transmit the antenna index information of the SRS from the N antennas in turn; and/or

    In the case that the SRS further includes a periodic SRS, and the SRS frequency domain hopping function is enabled, the downlink control information and/or the high layer signaling is used to indicate that the terminal is after the aperiodic SRS is sent. The frequency domain position of the periodic SRS before the next aperiodic SRS transmission is cyclically shifted by one hop subband, or used to indicate that the terminal is sent after the aperiodic SRS transmission after the aperiodic SRS transmission The frequency domain position of the periodic SRS remains unchanged.
27. The method according to any one of claims 17 to 26, wherein N = 2 or 4 or 8.
28. A measurement reference signal SRS processing apparatus is applied to a terminal, wherein the apparatus comprises:

    The first sending module is configured to transmit the SRS in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS.
29. The device of claim 28, wherein the device further comprises:

    The first receiving module is configured to receive downlink control information sent by the base station, where the downlink control information is used to request the terminal to send the aperiodic SRS.
30. The apparatus of claim 28, wherein the first transmitting module is configured to:

    The aperiodic SRS is transmitted in turn from the N antennas on subframes and/or symbols used to transmit the aperiodic SRS.
31. The apparatus of claim 28, wherein the first transmitting module is configured to:

    Transmitting the periodic SRS from the N antennas on a subframe and/or a symbol for transmitting the periodic SRS, and from the subframe and/or symbol used to transmit the aperiodic SRS The N antennas transmit the aperiodic SRS in turn.
32. The apparatus of claim 28, wherein the first transmitting module is configured to:

    And transmitting, by the N antennas, the SRS according to the downlink control information sent by the base station or the antenna index information notified by the high layer signaling.
33. The apparatus of claim 28, wherein the first transmitting module is configured to:

    In the case that the SRS further includes a periodic SRS, determining an antenna index for transmitting the SRS according to the number of SRS transmissions, and transmitting the SRS on a corresponding antenna according to the determined antenna index, where the SRS transmission times The sum of the number of non-periodic SRS transmissions and the number of periodic SRS transmissions.
34. The apparatus of claim 28, wherein the first transmitting module is configured to:

    In the case that the SRS further includes a periodic SRS, determining an antenna index for transmitting the periodic SRS according to a periodic SRS transmission number, and transmitting the periodic SRS on a corresponding antenna according to the determined antenna index; and/or

    In the case where the SRS further includes a periodic SRS, according to the aperiodic SRS transmission The number or the downlink control information or the high layer signaling sent by the base station determines an antenna index for transmitting the aperiodic SRS, and sends the aperiodic SRS on the corresponding antenna according to the determined antenna index.
35. A measurement reference signal SRS processing apparatus is applied to a base station, wherein the apparatus includes:

    The second receiving module is configured to receive, by the terminal, an SRS that is sent in turn from the N antennas, where N≥2, and the SRS includes: an aperiodic SRS.
36. The device of claim 35, wherein the device further comprises:

    The second sending module is configured to send downlink control information to the terminal before the second receiving module receives the SRS that is sent by the terminal in turn from the N antennas, where the downlink control information is used by the second sending module And instructing the terminal to send the aperiodic SRS.
37. The apparatus of claim 35, wherein the second receiving module is configured to:

    Receiving, by the terminal, the aperiodic SRS transmitted in turn from the N antennas on a subframe and/or a symbol for transmitting the aperiodic SRS.
38. The apparatus of claim 35, wherein the second receiving module is configured to:

    And receiving, in the case that the SRS further includes a periodic SRS, the periodic SRS that is sent by the terminal from the N antennas in a subframe and/or a symbol for transmitting the periodic SRS, and receiving the The aperiodic SRS that the terminal transmits in turn from the N antennas on subframes and/or symbols used to transmit the aperiodic SRS.
39. The device of claim 37 or 38, wherein the device further comprises:

    The notification module is configured to notify the terminal of the subframe and/or symbol by using downlink control information and/or higher layer signaling.
40. The device of claim 35, wherein the device further comprises:

    a third sending module, configured to send downlink control information and/or high layer signaling to the terminal;

    The downlink control information and/or the high layer signaling is used to notify the terminal to transmit the antenna index information of the SRS from the N antennas in turn; and/or

    And when the SRS further includes a periodic SRS, and the SRS frequency domain hopping function is enabled, the downlink control information and/or the high layer signaling is used to indicate that the terminal sends the aperiodic SRS. Thereafter, the frequency domain position of the periodic SRS before the next aperiodic SRS transmission is cyclically shifted by one hop subband, or used to indicate that the terminal is in the next aperiodic SRS after the aperiodic SRS transmission. The frequency domain position of the periodic SRS before transmission remains unchanged.

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