WO2017076162A1 - 测量参考信号srs处理方法和装置 - Google Patents

测量参考信号srs处理方法和装置 Download PDF

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Publication number
WO2017076162A1
WO2017076162A1 PCT/CN2016/102428 CN2016102428W WO2017076162A1 WO 2017076162 A1 WO2017076162 A1 WO 2017076162A1 CN 2016102428 W CN2016102428 W CN 2016102428W WO 2017076162 A1 WO2017076162 A1 WO 2017076162A1
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WO
WIPO (PCT)
Prior art keywords
srs
terminal
control information
downlink control
antennas
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PCT/CN2016/102428
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English (en)
French (fr)
Inventor
弓宇宏
李儒岳
陈艺戬
张淑娟
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中兴通讯股份有限公司
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Publication of WO2017076162A1 publication Critical patent/WO2017076162A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for processing a Sounding Reference Signal (SRS).
  • SRS Sounding Reference Signal
  • 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
  • UE User Equipment
  • the measurement reference signal SRS is a signal used by the terminal device and the base station to measure channel state information (CSI).
  • 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.
  • 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.
  • 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.
  • 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.
  • SU-MIMO Single User Multiple Input Multiple Output
  • LTE 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.
  • the UE 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.
  • non-pre-coded (ie antenna-specific) SRS should be used.
  • 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 SRS transmission delay caused by the four-antenna SRS handover transmission will be twice that of the two antennas.
  • 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.
  • a method for processing a measurement reference signal SRS including: a terminal transmitting an SRS in turn from N antennas, where N ⁇ 2, the SRS includes: Aperiodic SRS.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 Aperiodic SRS.
  • the SRS further includes a periodic SRS
  • 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.
  • the subframe and/or symbol includes: an uplink pilot time slot UpPTS symbol of a special subframe in a time division duplex TDD system.
  • 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
  • the second special subframe includes NA UpPTS symbols for transmitting the SRS, 1 ⁇ A ⁇ N.
  • 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.
  • 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.
  • the SRS further includes a periodic SRS
  • 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.
  • the SRS further includes a periodic SRS
  • 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.
  • 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.
  • 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.
  • 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.
  • N 2 or 4 or 8.
  • a method for processing a measurement reference signal SRS comprising: receiving, by a base station, SRSs transmitted by a terminal from N antennas, wherein N ⁇ 2, the SRS comprises: aperiodic SRS.
  • 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.
  • 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.
  • 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.
  • 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.
  • the SRS further includes a periodic SRS
  • 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.
  • the subframe and/or symbol includes: an uplink pilot time slot UpPTS symbol of a special subframe in a time division duplex TDD system.
  • 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
  • the second special subframe includes NA UpPTS symbols for transmitting the SRS, 1 ⁇ A ⁇ N.
  • the base station 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.
  • 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
  • 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.
  • N 2 or 4 or 8.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the apparatus further includes: a notification module, configured to notify the terminal by using the downlink control information and/or the high layer signaling.
  • a notification module configured to notify the terminal by using the downlink control information and/or the high layer signaling.
  • 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 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.
  • FIG. 1 is a flowchart 1 of a method for processing a measurement reference signal SRS according to an embodiment of the present invention
  • 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
  • FIG. 3 is a second flowchart of a method for processing a measurement reference signal SRS according to an embodiment of the present invention
  • 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
  • FIG. 5 is a structural block diagram 1 of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention.
  • FIG. 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.
  • FIG. 7 is a structural block diagram 2 of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention.
  • FIG. 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.
  • 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.
  • FIG. 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
  • FIG. 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. 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.
  • 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).
  • A-SRS aperiodic SRS
  • 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.
  • 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.
  • 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.
  • 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.
  • the downlink control information includes a non-period for triggering the terminal to perform multiple consecutive times.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the SRS further includes a periodic SRS
  • 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.
  • i is the original frequency domain position of the periodic SRS
  • K 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 SRS further includes a periodic SRS
  • 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:
  • 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.
  • 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.
  • 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.
  • the number N of antennas may be 2 or 4 or 8.
  • 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.
  • 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.
  • the terminal 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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;
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • FIG. 5 is a structural block diagram 1 of a measurement reference signal SRS processing apparatus according to an embodiment of the present invention.
  • 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.
  • 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.
  • 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 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 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 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. ;
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the subframe and/or the symbol may be downlink control information and/or higher layer signaling by the base station. Notify the terminal.
  • 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.
  • 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.
  • 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.
  • the SRS further includes a periodic SRS
  • 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.
  • 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.
  • the number N of antennas may be 2 or 4 or 8.
  • 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.
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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.
  • each of the above modules may be implemented by software or hardware.
  • 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.
  • 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.
  • 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.
  • 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).
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • An alternative embodiment of the present invention provides a four-antenna handover transmission method and apparatus supported by A-SRS.
  • 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).
  • high-level signaling also referred to as triggering by trigger type 0
  • 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.
  • 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.
  • 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.
  • the UpPTS Uplink Pilot Time Slot
  • A-SRS signal 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.
  • 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.
  • the base station 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.
  • 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.
  • 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.
  • 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.
  • the A-SRS signal is a full bandwidth signal.
  • 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.
  • the base station 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.
  • 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 may be used 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.
  • 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.
  • 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.
  • K is the number of subbands that allow SRS to hop.
  • the SRS counter is a conventional SRS counter, that is, only Count the periodic SRS.
  • 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
  • SRS Period SRS
  • n'SRS n SRS + n SRS1 .
  • the terminal transmits the SRS (periodic SRS) from the first antenna TX1, followed by the aperiodic SRS.
  • the base station 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.
  • the terminal will transmit the aperiodic SRS on the antenna 0 by default.
  • the SRS four antenna switching needs to consider the SRS frequency hopping problem supported by the A-SRS.
  • the antenna index for transmitting the SRS is related to the counter of the SRS transmission.
  • the A-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.
  • 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.
  • the frequency domain position of the periodic SRS transmission before the A-SRS transmission is uniformly cyclically shifted back by one sub-band position.
  • 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.
  • 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.
  • the SRS frequency hopping function 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.
  • 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.
  • the frequency domain hopping of the periodic SRS is not affected by the 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.
  • 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.
  • 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
  • K is the number of subbands that allow SRS to hop.
  • 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.
  • 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
  • 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 including periodic SRS transmission and aperiodic SRS transmission
  • 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 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.

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Abstract

本发明提供了一种测量参考信号SRS处理方法和装置。其中，该方法包括：终端从N个天线轮流发送SRS，其中，N≥2，SRS包括：非周期SRS。通过本发明，解决了相关技术中SRS发送时延长的问题，降低了SRS的发送时延。

Description

测量参考信号SRS处理方法和装置 技术领域
本发明涉及通信领域，具体而言，涉及一种测量参考信号(Sounding Reference Signal，简称为SRS)处理方法和装置。
背景技术
长期演进(Long Term Evolution，简称为LTE)***中，物理下行控制信道(Physical Downlink Control Channel，简称为PDCCH)用于承载上、下行调度信息，以及上行功率控制信息。下行控制信息(Downlink Control Information，简称为DCI)格式(format)分为DCI format 0、1、1A、1B、1C、1D、2、2A、3、3A等。基站(e-Node-B，简称为eNB)可以通过下行控制信息配置终端设备(User Equipment，简称为UE)，或者终端设备接收高层(higher layers)的配置，也称为通过高层信令来配置UE。
LTE***中，测量参考信号SRS是一种终端设备与基站间用来测量无线信道信息(Channel State Information，简称为CSI)的信号。在长期演进***中，UE按照eNB指示的带宽、频域位置、序列循环移位、周期和子帧偏置等参数，定时在发送子帧的最后一个数据符号上发送上行SRS。eNB根据接收到的SRS判断UE上行的CSI，并根据得到的CSI进行频域选择调度、闭环功率控制等操作。
在频域上，SRS传输需要覆盖频域所关心的频段，这可以通过两种方式实现：一种通过发送一个足够大的宽带SRS，来覆盖整个频段；另一种是通过发送多个窄带SRS，并在频域上进行跳频(hopping)，然后将一连串发送的SRS联合起来，就能覆盖整个带宽。
在同一SRS带宽内，多个UE可以在同一个频率梳上使用不同的循环移位，然后通过码分复用发送SRS，也可以两个UE在不同的频率梳上，通过频分复用发送SRS。举例来说，在LTE***中，在某个SRS带宽内 发送SRS的UE，可以使用的循环移位有8个，可以使用的频率梳为2个，所以说UE共有16个可用来发送SRS的资源，也就是说，在这一SRS带宽内，最多可以同时发送16个SRS。由于在LTE***中不支持上行单用户多输入多输出(Single User Multiple Input Multiple Output，简称为SU-MIMO)，UE在每一时刻只能有一根天线发送SRS，所以一个UE只需要一个SRS资源。因此，在上述SRS带宽内，***最多可以同时复用16个UE。
LTE中，最多可以使用两根天线作为上行发射天线。LTE支持两天线用户利用天线选择功能发送SRS，即两天线SRS切换发送。对于指定的SRS带宽，UE在同一个时刻仅在一个天线上发送SRS，两个天线轮流发送SRS，完成两天线SRS的信道质量信息探测。
高级LTE(LTE-Advanced，简称为LTE-A)***是LTE***的下一代演进***，在上行支持SU-MIMO，并且最多可以使用4根天线作为上行发射天线。也就是说，UE在同一时刻可以在多根天线上同时发送SRS，而eNB需要根据每根天线上收到的SRS来估计每条信道上的状态。
在LTE-A的研究中提出：在上行通信中，应该使用非预编码(即天线专有)的SRS。此时，当UE使用多天线发送非预编码的SRS时，每个UE所需要的SRS资源都会增加，也就造成了***内可以同时复用的UE数量下降。此外，四天线的SRS切换发送带来的SRS发送时延将是两天线的SRS切换发送的两倍。
针对相关技术中SRS发送时延长的问题，目前尚未提出有效的解决方案。
发明内容
本发明实施例提供了一种测量参考信号SRS处理方法和装置，以至少解决相关技术中SRS发送时延长的问题。
根据本发明实施例的一个方面，提供了一种测量参考信号SRS处理方法，包括：终端从N个天线轮流发送SRS，其中，N≥2，所述SRS包括： 非周期SRS。
可选地，在所述终端从所述N个天线轮流发送所述SRS之前，还包括：所述终端接收基站发送的下行控制信息，其中，所述下行控制信息用于请求终端发送所述非周期SRS。
可选地，所述下行控制信息包括多个用于触发所述终端进行一次非周期SRS发送的第一下行控制信息；和/或所述下行控制信息包括一个用于触发所述终端进行多次连续的非周期SRS发送的第二下行控制信息。
可选地，在所述下行控制信息包括所述多个第一下行控制信息的情况下，所述终端从所述N个天线轮流发送所述SRS包括：所述终端根据所述多个第一下行控制信息或高层信令指定的发送天线索引从所述N个天线轮流发送所述非周期SRS；在所述下行控制信息包括一个用于触发所述终端进行多次连续的非周期SRS发送的第二下行控制信息的情况下，所述终端从所述N个天线轮流发送所述SRS包括：首次发送所述非周期SRS时，所述终端根据所述第二下行控制信息或高层信令指定的发送天线索引，或者根据默认发送天线索引发送所述非周期SRS，非首次发送所述非周期SRS时，所述终端根据已发送的非周期SRS的数量确定发送天线索引并根据确定的发送天线索引发送所述非周期SRS。
可选地，所述下行控制信息还用于指示所述终端是否从所述N个天线轮流发送所述非周期SRS，所述终端在所述下行控制信息指示为是的情况下，从所述N个天线轮流发送所述非周期SRS。
可选地，所述终端从所述N个天线轮流发送所述SRS包括：所述终端在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送所述非周期SRS。
可选地，所述SRS还包括周期SRS，所述终端从所述N个天线轮流发送所述SRS包括：所述终端在用于发送所述周期SRS的子帧和/或符号上从所述N个天线轮流发送所述周期SRS，并在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送所述非周期SRS。
可选地，所述子帧和/或符号包括：时分双工TDD***中特殊子帧的上行导频时隙UpPTS符号。
可选地，所述特殊子帧的UpPTS符号包括：一个特殊子帧中的N个UpPTS符号；或者，两个连续的特殊子帧中的N个UpPTS符号，其中，所述两个特殊子帧中，第一个特殊子帧包括A个用于发送所述SRS的UpPTS符号，第二个特殊子帧包括N-A个用于发送所述SRS的UpPTS符号，1≤A<N。
可选地，所述子帧和/或符号由基站通过下行控制信息和/或高层信令通知给所述终端。
可选地，所述终端从所述N个天线轮流发送所述SRS包括：所述终端根据基站下发的下行控制信息或高层信令通知的天线索引信息从所述N个天线轮流发送所述SRS。
可选地，所述SRS还包括周期SRS，所述终端从所述N个天线轮流发送所述SRS包括：所述终端根据SRS传输次数确定用于发送所述SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述SRS，其中，所述SRS传输次数为非周期SRS传输次数和周期SRS传输次数之和。
可选地，所述SRS还包括周期SRS，所述终端从所述N个天线轮流发送所述SRS包括：所述终端根据周期SRS传输次数确定用于发送所述周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述周期SRS；和/或所述终端根据非周期SRS传输次数或基站下发的下行控制信息或高层信令的通知确定用于发送所述非周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述非周期SRS。
可选地，所述SRS还包括周期SRS，在SRS频域跳频功能使能的情况下：在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置向后循环移位一个跳频子带；或者，在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置保持不变。
可选地，在所述终端从所述N个天线轮流发送所述SRS之前，还包括：所述终端接收基站下发的下行控制信息和/或高层信令，并按照所述下行控制信息和/或高层信令的指示将所述周期SRS的频域位置向后循环移位一个跳频子带；或者，所述终端在判断已接收到所述基站下发的用于请求所述终端发送所述非周期SRS且指示所述终端从所述N个天线轮流发送所述非周期SRS的下行控制信息和/或高层信令的情况下，将所述周期SRS的频域位置向后循环移位一个跳频子带；或者，所述终端接收基站下发的下行控制信息和/或高层信令，并按照所述下行控制信息和/或高层信令的指示将所述周期SRS的频域位置保持不变；或者，所述终端在判断已接收到所述基站下发的用于请求所述终端发送所述非周期SRS且指示所述终端从所述N个天线轮流发送所述非周期SRS的下行控制信息和/或高层信令的情况下，将所述周期SRS的频域位置保持不变。
可选地，N＝2或4或8。
根据本发明的另一个方面，还提供了一种测量参考信号SRS处理方法，包括：基站接收终端从N个天线上轮流发送的SRS，其中，N≥2，所述SRS包括：非周期SRS。
可选地，在所述基站接收所述终端从所述N个天线上轮流发送的所述SRS之前，还包括：所述基站向所述终端发送下行控制信息，其中，所述下行控制信息用于指示终端发送所述非周期SRS。
可选地，所述下行控制信息包括多个用于触发所述终端进行一次非周期SRS发送的第一下行控制信息；和/或所述下行控制信息包括一个用于触发所述终端进行多次连续的非周期SRS发送的第二下行控制信息。
可选地，所述下行控制信息还用于指示所述终端是否从所述N个天线轮流发送所述非周期SRS，其中，在所述下行控制信息指示为是的情况下，所述终端从所述N个天线轮流发送所述非周期SRS。
可选地，所述基站接收所述终端从所述N个天线上轮流发送的所述SRS包括：所述基站接收所述终端在用于发送所述非周期SRS的子帧和/ 或符号上从所述N个天线轮流发送的所述非周期SRS。
可选地，所述SRS还包括周期SRS，所述基站接收所述终端从所述N个天线上轮流发送的所述SRS包括：所述基站接收所述终端在用于发送所述周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述周期SRS，并接收所述终端在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述非周期SRS。
可选地，所述子帧和/或符号包括：时分双工TDD***中特殊子帧的上行导频时隙UpPTS符号。
可选地，所述特殊子帧的UpPTS符号包括：一个特殊子帧中的N个UpPTS符号；或者，两个连续的特殊子帧中的N个UpPTS符号，其中，所述两个特殊子帧中，第一个特殊子帧包括A个用于发送所述SRS的UpPTS符号，第二个特殊子帧包括N-A个用于发送所述SRS的UpPTS符号，1≤A<N。
可选地，在所述基站接收所述终端从所述N个天线上轮流发送的所述SRS之前，还包括：所述基站通过下行控制信息和/或高层信令将所述子帧和/或符号通知给所述终端。
可选地，在所述基站接收所述终端从所述N个天线上轮流发送的所述SRS之前，还包括：所述基站向所述终端发送下行控制信息和/或高层信令；其中，所述下行控制信息和/或所述高层信令用于通知所述终端用于从所述N个天线轮流发送所述SRS的天线索引信息；和/或在所述SRS还包括周期SRS，并且所述SRS频域跳频功能使能的情况下，所述下行控制信息和/或所述高层信令用于指示所述终端在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置向后循环移位一个跳频子带，或用于指示所述终端在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置保持不变。
可选地，N＝2或4或8。
根据本发明的另一个方面，还提供了一种测量参考信号SRS处理装置， 应用于终端，包括：第一发送模块，设置为从N个天线轮流发送SRS，其中，N≥2，所述SRS包括：非周期SRS。
可选地，所述装置还包括：第一接收模块，设置为接收基站发送的下行控制信息，其中，所述下行控制信息用于请求终端发送所述非周期SRS。
可选地，所述第一发送模块设置为：在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送所述非周期SRS。
可选地，所述第一发送模块设置为：在用于发送所述周期SRS的子帧和/或符号上从所述N个天线轮流发送所述周期SRS，并在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送所述非周期SRS。
可选地，所述第一发送模块设置为：根据基站下发的下行控制信息或高层信令通知的天线索引信息从所述N个天线轮流发送所述SRS。
可选地，所述第一发送模块设置为：在所述SRS还包括周期SRS的情况下，根据SRS传输次数确定用于发送所述SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述SRS，其中，所述SRS传输次数为非周期SRS传输次数和周期SRS传输次数之和。
可选地，所述第一发送模块设置为：在所述SRS还包括周期SRS的情况下，根据周期SRS传输次数确定用于发送所述周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述周期SRS；和/或在所述SRS还包括周期SRS的情况下，根据非周期SRS传输次数或基站下发的下行控制信息或高层信令的通知确定用于发送所述非周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述非周期SRS。
根据本发明的另一个方面，还提供了一种测量参考信号SRS处理装置，应用于基站，包括：第二接收模块，设置为接收终端从N个天线上轮流发送的SRS，其中，N≥2，所述SRS包括：非周期SRS。
可选地，所述装置还包括：第二发送模块，设置为在所述第二接收模块接收所述终端从所述N个天线上轮流发送的所述SRS之前，向所述终端发送下行控制信息，其中，所述下行控制信息用于指示所述终端发送所 述非周期SRS。
可选地，所述第二接收模块设置为：接收所述终端在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述非周期SRS。
可选地，所述第二接收模块设置为：在所述SRS还包括周期SRS的情况下，接收所述终端在用于发送所述周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述周期SRS，并接收所述终端在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述非周期SRS。
可选地，所述装置还包括：通知模块，设置为通过下行控制信息和/或高层信令将所述子帧和/或符号通知给所述终端。
可选地，所述装置还包括：第三发送模块，设置为向所述终端发送下行控制信息和/或高层信令；其中，所述下行控制信息和/或所述高层信令用于通知所述终端用于从所述N个天线轮流发送所述SRS的天线索引信息；和/或在所述SRS还包括周期SRS，并且所述SRS频域跳频功能使能的情况下，所述下行控制信息和/或所述高层信令用于指示所述终端在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置向后循环移位一个跳频子带，或用于指示所述终端在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置保持不变。
通过本发明实施例提供的方案，采用终端从N个天线轮流发送SRS，其中，N≥2，SRS包括：非周期SRS的方式，解决了相关技术中SRS发送时延长的问题，降低了SRS的发送时延。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的测量参考信号SRS处理方法的流程图一；
图2是根据本发明实施例的测量参考信号SRS处理方法的可选流程图一；
图3是根据本发明实施例的测量参考信号SRS处理方法的流程图二；
图4是根据本发明实施例的测量参考信号SRS处理方法的可选流程图二；
图5是根据本发明实施例的测量参考信号SRS处理装置的结构框图一；
图6是根据本发明实施例的测量参考信号SRS处理装置的可选结构框图一；
图7是根据本发明实施例的测量参考信号SRS处理装置的结构框图二；
图8是根据本发明实施例的测量参考信号SRS处理装置的可选结构框图二；
图9是根据本发明可选实施例的测量参考信号SRS处理方法的UpPTS的示意图一；
图10是根据本发明可选实施例的测量参考信号SRS处理方法的UpPTS的示意图二；
图11是根据本发明可选实施例的测量参考信号SRS处理方法的子帧的示意图；
图12是根据本发明可选实施例的测量参考信号SRS处理方法的跳频发送SRS的示意图一；
图13是根据本发明可选实施例的测量参考信号SRS处理方法的跳频发送SRS的示意图二。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语 “第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
在本实施例中提供了一种测量参考信号SRS处理方法，图1是根据本发明实施例的测量参考信号SRS处理方法的流程图一，如图1所示，该流程包括如下步骤：
步骤S102，终端从N个天线轮流发送SRS，其中，N≥2，SRS包括：非周期SRS(Aperiodic SRS，简称为A-SRS)。
通过上述步骤，终端在多个天线上轮流发送非周期的SRS，由于发送的SRS是非周期的，因此可以控制SRS的发送时间，通过合理安排非周期SRS的发送，就可以实现对发送时延的控制。可见，采用上述步骤，解决了相关技术中SRS发送时延长的问题，降低了SRS的发送时延。
图2是根据本发明实施例的测量参考信号SRS处理方法的可选流程图一，可选地，如图2所示，该流程包括如下步骤：
步骤S100，终端接收基站发送的用于请求终端发送非周期SRS的下行控制信息；
步骤S102，终端从N个天线轮流发送SRS，其中，N≥2，SRS包括：非周期SRS。
可选地，下行控制信息可以包括多个用于触发终端进行一次非周期SRS发送的第一下行控制信息；下行控制信息也可以包括一个用于触发终端进行多次连续的非周期SRS发送的第二下行控制信息。
下面分别举例说明下行控制信息包括一个或多个触发信息时终端如何从N个天线轮流发送非周期SRS。
例1，在下行控制信息包括多个第一下行控制信息的情况下，终端可以根据多个第一下行控制信息或高层信令指定的发送天线索引从N个天线轮流发送非周期SRS。
例2，在下行控制信息包括一个用于触发终端进行多次连续的非周期 SRS发送的第二下行控制信息的情况下，首次发送非周期SRS时，终端可以根据第二下行控制信息或高层信令指定的发送天线索引，或者根据默认发送天线索引发送非周期SRS，非首次发送非周期SRS时，终端可以根据已发送的非周期SRS的数量确定发送天线索引并根据确定的发送天线索引发送非周期SRS。
可选地，下行控制信息还可以用于指示终端是否从N个天线轮流发送非周期SRS，终端可以在下行控制信息指示为是的情况下，从N个天线轮流发送非周期SRS。
可选地，在上述步骤S102中，终端可以在用于发送非周期SRS的子帧和/或符号上从N个天线轮流发送非周期SRS。
可选地，在SRS还包括周期SRS(Periodic SRS，简称为P-SRS)的情况下，在上述步骤S102中，终端可以在用于发送周期SRS的子帧和/或符号上从N个天线轮流发送周期SRS，并在用于发送非周期SRS的子帧和/或符号上从N个天线轮流发送非周期SRS。通过上述步骤，终端可以在周期SRS的发送过程之间，发送非周期的SRS，从而使相同时间内发送的SRS数量增加，解决了相关技术中SRS发送时延长的问题，降低了SRS的发送时延。
可选地，子帧和/或符号可以包括：时分双工TDD***中特殊子帧的上行导频时隙UpPTS符号，其中，特殊子帧的UpPTS符号可以包括：一个特殊子帧中的N个UpPTS符号；或者，两个连续的特殊子帧中的N个UpPTS符号，其中，两个特殊子帧中，第一个特殊子帧包括A个用于发送SRS的UpPTS符号，第二个特殊子帧包括N-A个用于发送SRS的UpPTS符号，1≤A<N。
可选地，子帧和/或符号可以由基站通过下行控制信息和/或高层信令通知给终端。
可选地，在上述步骤S102中，终端可以根据基站下发的下行控制信息或高层信令通知的天线索引信息从N个天线轮流发送SRS。
可选地，在SRS还包括周期SRS的情况下，在上述步骤S102中，终端可以根据SRS传输次数确定用于发送SRS的天线索引，并根据确定的天线索引在对应的天线上发送SRS，其中，SRS传输次数为非周期SRS传输次数和周期SRS传输次数之和。
可选地，在SRS还包括周期SRS的情况下，在上述步骤S102中，终端可以根据周期SRS传输次数确定用于发送周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送周期SRS；
在SRS还包括周期SRS的情况下，终端也可以根据非周期SRS传输次数或基站下发的下行控制信息或高层信令的通知确定用于发送非周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送非周期SRS。
可选地，在SRS还包括周期SRS，并且SRS频域跳频功能使能的情况下，在非周期SRS发送之后，在下一次非周期SRS发送之前的周期SRS的频域位置可以向后循环移位一个跳频子带。作为一个可选的实施方式，向后循环移位一个跳频子带后的频域位置可以是i'＝(i+1)modK，其中，i为所述周期SRS的原频域位置，K为允许跳频的子带数，例如，允许跳频的子带数为4，在第三子带(子带2)上发送了非周期SRS，那么原本在第四子带(子带3)上发送的周期SRS的频域位置移动到i'＝(4+1)mod4＝1，即在第一子带(子带0)上发送原本要在第四子带(子带3)上发送的周期SRS。
可选地，在SRS还包括周期SRS，并且SRS频域跳频功能使能的情况下，在非周期SRS发送之后，在下一次非周期SRS发送之前的周期SRS的频域位置可以保持不变。
终端可以采用以下两种方式确定在SRS还包括周期SRS，并且SRS频域跳频功能使能的情况下，在非周期SRS发送之后，在下一次非周期SRS发送之前的周期SRS的频域位置：
方式一：终端可以接收基站下发的下行控制信息和/或高层信令，并按照下行控制信息和/或高层信令的指示将周期SRS的频域位置向后循环移 位一个跳频子带；或者，
终端可以接收基站下发的下行控制信息和/或高层信令，并按照下行控制信息和/或高层信令的指示将周期SRS的频域位置保持不变；
方式二：终端在判断已接收到基站下发的用于请求终端发送非周期SRS且指示终端从N个天线轮流发送非周期SRS的下行控制信息和/或高层信令的情况下，可以将周期SRS的频域位置向后循环移位一个跳频子带；或者，
终端在判断已接收到基站下发的用于请求终端发送非周期SRS且指示终端从N个天线轮流发送非周期SRS的下行控制信息和/或高层信令的情况下，可以将周期SRS的频域位置保持不变。
可选地，天线的个数N可以为2或者4或者8。
下面以4天线轮流发送SRS为例，说明终端在N个天线上轮流发送SRS的过程。
终端可以在第一天线、第二天线、第三天线、第四天线上轮流发送SRS，其中，SRS包括周期SRS和/或非周期SRS。
终端还可以在TDD***中的特殊子帧的UpPTS符号上发送SRS；
其中，终端在TDD***中的特殊子帧的UpPTS符号上发送的SRS可以为非周期SRS。
例如，终端可以配置一个特殊子帧的四个UpPTS符号用于发送SRS，其中第一天线、第二天线、第三天线、第四天线分别在第一UpPTS符号、第二UpPTS符号、第三UpPTS符号、第四UpPTS符号上发送SRS；
终端也可以配置两个连续的特殊子帧的四个UpPTS符号用于发送SRS，其中每个特殊子帧中配置两个UpPTS符号用于发送SRS，其中第一天线、第二天线分别在第一个特殊子帧的两个UpPTS中发送SRS，第三天线、第四天线分别在第二个特殊子帧的两个UpPTS中发送SRS；
其中，终端可以通过接收高层信令，确定特殊子帧中用于发送SRS 的UpPTS符号。
在终端发送SRS之前，终端可以通过接收下行控制信息，触发特殊子帧中的两个或四个UpPTS符号用于发送非周期SRS。
终端可以在可用于发送周期SRS和非周期SRS的子帧和/或符号上从第一天线、第二天线、第三天线、第四天线轮流发送SRS；
其中，可用于发送SRS的子帧和/或符号上发送的天线索引与SRS传输次数计数器的值相关，SRS传输次数计数器可以对周期SRS和非周期SRS的传输都进行计数。
在SRS频域跳频功能使能的情况下，非周期SRS发送之后下一次非周期SRS发送之前的周期SRS的频域位置统一向后循环移位一个跳频子带的位置。
终端还可以支持通过一个下行控制信息触发多次连续的A-SRS发送，且首次A-SRS发送的天线索引为第四天线索引或者由下行控制信息或高层信令配置给终端，其余的A-SRS发送的天线索引与非周期SRS的计数器的值相关；其中，用于发送A-SRS的天线索引信息可以由下行控制信息或者高层信令通知给终端。
在本实施例中还提供了一种测量参考信号SRS处理方法，图3是根据本发明实施例的测量参考信号SRS处理方法的流程图二，如图3所示，该流程包括如下步骤：
步骤S302，基站接收终端从N个天线上轮流发送的SRS，其中，N≥2，SRS包括：非周期SRS。
通过上述步骤，基站可以接收到终端在多个天线上轮流发送的非周期SRS，由于终端发送的SRS是非周期的，因此可以控制SRS的发送时间。可见，采用上述步骤，解决了相关技术中SRS发送时延长的问题，降低了SRS的发送时延。
图4是根据本发明实施例的测量参考信号SRS处理方法的可选流程图二，可选地，如图4所示，该流程包括如下步骤：
步骤S300，基站向终端发送下行控制信息，其中，下行控制信息用于指示终端发送非周期SRS；
步骤S302，基站接收终端从N个天线上轮流发送的SRS，其中，N≥2，SRS包括：非周期SRS。
可选地，上述下行控制信息可以包括多个用于触发终端进行一次非周期SRS发送的第一下行控制信息；上述下行控制信息也可以包括一个用于触发终端进行多次连续的非周期SRS发送的第二下行控制信息；其中，上述下行控制信息还可以用于指示终端是否从N个天线轮流发送非周期SRS，其中，在下行控制信息指示为是的情况下，终端从N个天线轮流发送非周期SRS。
可选地，在上述步骤S302中，基站可以接收终端在用于发送非周期SRS的子帧和/或符号上从N个天线轮流发送的非周期SRS。
可选地，在SRS还包括周期SRS的情况下，在上述步骤S302中，基站可以接收终端在用于发送周期SRS的子帧和/或符号上从N个天线轮流发送的周期SRS，并接收终端在用于发送非周期SRS的子帧和/或符号上从N个天线轮流发送的非周期SRS。
上述子帧和/或符号可以包括：时分双工TDD***中特殊子帧的上行导频时隙UpPTS符号，其中，特殊子帧的UpPTS符号可以包括：一个特殊子帧中的N个UpPTS符号；或者，两个连续的特殊子帧中的N个UpPTS符号，其中，两个特殊子帧中，第一个特殊子帧包括A个用于发送SRS的UpPTS符号，第二个特殊子帧包括N-A个用于发送SRS的UpPTS符号，1≤A<N。
可选地，在上述步骤S302之前，基站可以通过下行控制信息和/或高层信令将子帧和/或符号通知给终端。
可选地，在上述步骤S302之前，基站可以向终端发送下行控制信息和/或高层信令；
其中，下行控制信息和/或高层信令可以用于通知终端用于从N个天 线轮流发送SRS的天线索引信息；
在SRS还包括周期SRS，并且SRS频域跳频功能使能的情况下，下行控制信息和/或高层信令可以用于指示终端在非周期SRS发送之后，在下一次非周期SRS发送之前的周期SRS的频域位置向后循环移位一个跳频子带，或者可以用于指示终端在非周期SRS发送之后，在下一次非周期SRS发送之前的周期SRS的频域位置保持不变。
可选地，基站接收到的SRS可以由终端的2个天线发送，也可以由终端的4个天线发送。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例的方法。
在本实施例中还提供了一种测量参考信号SRS处理装置，应用于终端，该装置用于实现上述实施例及可选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图5是根据本发明实施例的测量参考信号SRS处理装置的结构框图一，如图5所示，该装置包括：第一发送模块52，设置为从N个天线轮流发送SRS，其中，N≥2，SRS包括：非周期SRS。
图6是根据本发明实施例的测量参考信号SRS处理装置的可选结构框图一，如图6所示，可选地，上述装置还包括：第一接收模块62，耦合至第一发送模块52，设置为接收基站发送的下行控制信息，其中，下行控制信息设置为请求终端发送非周期SRS。
可选地，上述下行控制信息可以包括多个用于触发终端进行一次非周期SRS发送的第一下行控制信息；下行控制信息还可以包括一个用于触发终端进行多次连续的非周期SRS发送的第二下行控制信息。
可选地，在下行控制信息包括多个第一下行控制信息的情况下，终端可以根据多个第一下行控制信息或高层信令指定的发送天线索引从N个天线轮流发送非周期SRS；
在下行控制信息包括一个用于触发终端进行多次连续的非周期SRS发送的第二下行控制信息的情况下，首次发送非周期SRS时，终端可以根据第二下行控制信息或高层信令指定的发送天线索引，或者根据默认发送天线索引发送非周期SRS，非首次发送非周期SRS时，终端可以根据已发送的非周期SRS的数量确定发送天线索引并根据确定的发送天线索引发送非周期SRS。
可选地，下行控制信息还可以用于指示终端是否从N个天线轮流发送非周期SRS，终端在下行控制信息指示为是的情况下，从N个天线轮流发送非周期SRS。
可选地，第一发送模块52设置为：在用于发送非周期SRS的子帧和/或符号上从N个天线轮流发送非周期SRS。
可选地，第一发送模块52设置为：在用于发送周期SRS的子帧和/或符号上从N个天线轮流发送周期SRS，并在用于发送非周期SRS的子帧和/或符号上从N个天线轮流发送非周期SRS。
可选地，子帧和/或符号可以包括：时分双工TDD***中特殊子帧的上行导频时隙UpPTS符号，其中，特殊子帧的UpPTS符号可以包括：一个特殊子帧中的N个UpPTS符号；或者，两个连续的特殊子帧中的N个UpPTS符号，其中，两个特殊子帧中，第一个特殊子帧包括A个用于发送SRS的UpPTS符号，第二个特殊子帧包括N-A个用于发送SRS的UpPTS符号，1≤A<N。
可选地，子帧和/或符号可以由基站通过下行控制信息和/或高层信令 通知给终端。
可选地，上述第一发送模块52设置为：根据基站下发的下行控制信息或高层信令通知的天线索引信息从N个天线轮流发送SRS。
可选地，上述第一发送模块52设置为：在SRS还包括周期SRS的情况下，根据SRS传输次数确定用于发送SRS的天线索引，并根据确定的天线索引在对应的天线上发送SRS，其中，SRS传输次数为非周期SRS传输次数和周期SRS传输次数之和。
可选地，上述第一发送模块52设置为：在SRS还包括周期SRS的情况下，根据周期SRS传输次数确定用于发送周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送周期SRS；和/或在SRS还包括周期SRS的情况下，根据非周期SRS传输次数或基站下发的下行控制信息或高层信令的通知确定用于发送非周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送非周期SRS。
可选地，在SRS还包括周期SRS，并且SRS频域跳频功能使能的情况下，在非周期SRS发送之后，在下一次非周期SRS发送之前的周期SRS的频域位置向后循环移位一个跳频子带；或者，在非周期SRS发送之后，在下一次非周期SRS发送之前的周期SRS的频域位置保持不变。
可选地，第一接收模块62还设置为：接收基站下发的下行控制信息和/或高层信令，并按照下行控制信息和/或高层信令的指示将周期SRS的频域位置向后循环移位一个跳频子带；或者，在判断已接收到基站下发的用于请求终端发送非周期SRS且指示终端从N个天线轮流发送非周期SRS的下行控制信息和/或高层信令的情况下，将周期SRS的频域位置向后循环移位一个跳频子带；或者，终端接收基站下发的下行控制信息和/或高层信令，并按照下行控制信息和/或高层信令的指示将周期SRS的频域位置保持不变；或者，终端在判断已接收到基站下发的用于请求终端发送非周期SRS且指示终端从N个天线轮流发送非周期SRS的下行控制信息和/或高层信令的情况下，将周期SRS的频域位置保持不变。
可选地，天线数目N可以为2或者4或者8。
在本实施例中还提供了一种测量参考信号SRS处理装置，应用于基站，该装置用于实现上述实施例及可选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图7是根据本发明实施例的测量参考信号SRS处理装置的结构框图二，如图7所示，该装置包括：第二接收模块72，设置为接收终端从N个天线上轮流发送的SRS，其中，N≥2，SRS包括：非周期SRS。
图8是根据本发明实施例的测量参考信号SRS处理装置的可选结构框图二，如图8所示，可选地，上述装置还包括：第二发送模块82，耦合至第二接收模块72，设置为向终端发送下行控制信息，其中，下行控制信息用于指示终端发送非周期SRS。
可选地，上述下行控制信息可以包括多个用于触发终端进行一次非周期SRS发送的第一下行控制信息；上述下行控制信息还可以包括一个用于触发终端进行多次连续的非周期SRS发送的第二下行控制信息。
可选地，下行控制信息还可以用于指示终端是否从N个天线轮流发送非周期SRS，其中，在下行控制信息指示为是的情况下，终端从N个天线轮流发送非周期SRS。
可选地，上述第二接收模块72设置为：接收终端在用于发送非周期SRS的子帧和/或符号上从N个天线轮流发送的非周期SRS。
可选地，上述第二接收模块72设置为：在SRS还包括周期SRS的情况下，接收终端在用于发送周期SRS的子帧和/或符号上从N个天线轮流发送的周期SRS，并接收终端在用于发送非周期SRS的子帧和/或符号上从N个天线轮流发送的非周期SRS。
可选地，子帧和/或符号可以包括：时分双工TDD***中特殊子帧的上行导频时隙UpPTS符号，其中，特殊子帧的UpPTS符号可以包括：一个特殊子帧中的N个UpPTS符号；或者，两个连续的特殊子帧中的N个 UpPTS符号，其中，两个特殊子帧中，第一个特殊子帧包括A个用于发送SRS的UpPTS符号，第二个特殊子帧包括N-A个用于发送SRS的UpPTS符号，1≤A<N。
可选地，上述装置还包括：通知模块，耦合至第二接收模块72，设置为通过下行控制信息和/或高层信令将子帧和/或符号通知给终端。
可选地，上述装置还可以包括：第三发送模块，耦合至第二接收模块72，设置为向终端发送下行控制信息和/或高层信令；其中，下行控制信息和/或高层信令可以用于通知终端用于从N个天线轮流发送SRS的天线索引信息；和/或在SRS还包括周期SRS，并且SRS频域跳频功能使能的情况下，下行控制信息和/或高层信令可以用于指示终端在非周期SRS发送之后，在下一次非周期SRS发送之前的周期SRS的频域位置向后循环移位一个跳频子带，或用于指示所述终端在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置保持不变。
可选地，上述装置接收到的SRS可以由终端的2个天线发送，也可以由终端的4个天线发送，也可以由终端的8个天线发送。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述模块分别位于多个处理器中。
本发明的实施例还提供了一种软件，该软件用于执行上述实施例及可选实施方式中描述的技术方案。
本发明的实施例还提供了一种存储介质。在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
步骤S102，终端从N个天线轮流发送SRS，其中，N≥2，SRS包括：非周期SRS。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
步骤S302，基站接收终端从N个天线上轮流发送的SRS，其中，N≥2，SRS包括：非周期SRS。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
为了使本发明实施例的描述更加清楚，下面结合可选实施例进行描述和说明。
本发明可选实施例提供了一种A-SRS支持下的四天线切换发送方法及装置。
根据本发明可选实施例提供的A-SRS支持下的四天线切换发送方法，UE可通过高层信令(也称为通过trigger type 0触发)或下行控制信息(也称为通过trigger type 1触发)这两种触发方式发送SRS，基于高层信令触发的为周期SRS，基于下行控制信息触发的为非周期SRS。非周期发送SRS的方式，改善了SRS资源的利用率，提高了资源调度的灵活性。
在配置完整维度的MIMO(Full Dimension-MIMO，简称为FD-MIMO)或大量天线的MIMO(Massive-MIMO)的场景下，随着时分双工技术(Time Division Duplexing，简称为TDD)信道互易性对SRS测量需求的增加以及复用用户数的增多，现有的SRS复用容量已经变得很难满足需求。通过引入针对四天线的非周期SRS切换发送来增强SRS的复用容量的同时也降低了SRS发送的时延。
下面结合附图对本发明可选实施例进行说明。
可选实施例1
图9是根据本发明可选实施例的测量参考信号SRS处理方法的UpPTS的示意图一，如图9所示，终端可以配置特殊子帧的四个上行导频时隙(Uplink Pilot Time Slot，简称为UpPTS)符号分别用于终端四个天线发送A-SRS信号，例如，在第一个UpPTS符号上从该终端的第一个天线(TX1)上发送A-SRS信号，在第二个UpPTS符号上从该终端的第二个天线(TX2)上发送A-SRS信号，在第三个UpPTS符号上从该终端的第 三个天线(TX3)上发送A-SRS信号，在第四个UpPTS符号上从该终端的第四个天线(TX4)上发送A-SRS信号，其中，A-SRS信号为全带宽信号。
在特殊子帧中的UpPTS符号大于四个的情况下，基站可以通过高层信令或者下行控制信息配置向终端指示其中的哪四个符号用于该终端四个天线发送A-SRS，其它的UpPTS符号可以用于终端发送上行数据，或者用于其它终端发送SRS或者A-SRS。
在特殊子帧的UpPTS符号上发送A-SRS之前，基站可以向终端发送下行控制信息，例如，DCI format 0或者DCI format 4，触发终端在之后的最近的特殊子帧的UpPTS符号上发送A-SRS。可选地，基站可以通过向终端发送一个下行控制信息触发终端在特殊子帧的指定的四个UpPTS符号上轮流从终端的四个天线上发送A-SRS。
可选实施例2
图10是根据本发明可选实施例的测量参考信号SRS处理方法的UpPTS的示意图二，如图10所示，终端可以配置两个特殊子帧的四个UpPTS符号分别用于终端四个天线发送A-SRS信号，其中，每个特殊子帧的两个UpPTS符号可用于该终端从四个天线的其中两个天线上发送A-SRS信号。例如，在第一个特殊子帧的第一个UpPTS符号上从该终端的第一个天线(TX1)上发送A-SRS信号，在第一个特殊子帧的第二个UpPTS符号上从该终端的第二个天线(TX2)上发送A-SRS信号，在第二个特殊子帧的第一个UpPTS符号上从终端的第三个天线(TX3)上发送A-SRS信号，在第二个特殊子帧的第二个UpPTS符号上从终端的第四个天线(TX4)上发送A-SRS信号。其中，A-SRS信号为全带宽信号。
在每个特殊子帧中的UpPTS符号大于两个的情况下，基站可以通过高层信令或者下行控制信息配置向终端指示其中的哪两个符号用于该终端四个天线发送A-SRS。剩余的UpPTS符号可以用于终端发送上行数据，或者用于其它终端发送SRS或者A-SRS信号。
在特殊子帧的UpPTS符号上发送A-SRS之前，基站向终端发送下行控制信息，例如DCI format 0或者DCI format 4，触发终端在之后的最近的特殊子帧的UpPTS符号上发送A-SRS。可选地，基站可以在每个特殊子帧之前向终端发送一个下行控制信息用于触发终端在特殊子帧的两个指定的UpPTS符号上轮流从终端的四个天线的其中两个天线上发送A-SRS。
可选地，基站可以通过高层信令为终端配置两套天线子集信息，例如，一套为TX1和TX2的集合，另一套为TX3和TX4的集合，然后通过下行控制信息触发特殊子帧的两个符号分别用于从这两套天线子集所包括的天线上轮流发送A-SRS信号，其中，A-SRS信号的配置信息是通过高层信令或者DCI format 4中的两比特下行控制信息通知给终端的。天线子集信息也可以通过DCI format 4中的两比特下行控制信息通知给终端。
可选实施例3
终端的四天线SRS切换发送可以同时支持在周期SRS和非周期SRS子帧/符号上发送周期SRS和非周期SRS。
现有协议中的两天线切换发送SRS只支持周期SRS，且在配置给终端的周期SRS子帧/符号上用于发送SRS的发送天线索引的确定与SRS传输计数器的值相关，即对于SRS跳频不使能的情况下a(nSRS)＝nSRSmod2，对于SRS跳频功能使能的情况下，
Figure PCTCN2016102428-appb-000001
其中
Figure PCTCN2016102428-appb-000002
K为允许SRS跳频的子带数。
图11是根据本发明可选实施例的测量参考信号SRS处理方法的子帧的示意图，如图11所示，若四天线切换不支持A-SRS，SRS计数器即为传统的SRS计数器，即只对周期性SRS计数。在不同的SRS传输子帧/ 符号上，终端轮流从终端的四个天线的不同天线上发送SRS(周期性SRS)，假设SRS四天线切换中，在每个SRS传输子帧/符号上用于发送SRS的天线索引也与SRS计数器的值相关，例如在周期性SRS第一次传输的时候nSRS＝0，终端从第一个天线TX1上发送SRS，在周期性SRS第二次传输的时候nSRS＝1，终端从第二个天线TX2上发送SRS，在周期性SRS第三次传输的时候nSRS＝2，终端从第三个天线TX3上发送SRS，在周期性SRS第四次传输的时候nSRS＝3，终端从第四个天线TX4上发送SRS。因此若要对SRS四天线切换支持发送非周期SRS，则需要定义一个新的传输计数器n'SRS，该计数器既对该终端的周期SRS的传输进行计数，同时也对该终端的非周期SRS的传输进行计数，例如n'SRS＝nSRS+nSRS1。例如，如图11所示，在周期性SRS第一次传输的时候SRS传输计数器的值n'SRS＝0，终端从第一个天线TX1上发送SRS(周期SRS)，紧接着的非周期SRS传输的时候SRS传输计数器n'SRS＝1，终端从第二个天线TX2上发送SRS，然后在周期性SRS第二次传输的时候n'SRS＝2，终端从第三个天线TX3上发送SRS，在周期性SRS第三次传输的时候n'SRS＝3，终端从第四个天线TX4上发送SRS。
此外，也可以不是该终端所有的A-SRS都需要参与四天线的切换发送，例如，在从非周期SRS子帧/符号上发送A-SRS信号之前，基站通过下行控制信号向终端请求非周期SRS的发送，同时向终端指示该非周期SRS是否用于终端的四个天线的切换发送。在终端接收到的指示为该非周期SRS不参与终端的四个天线的切换发送的情况下，终端将默认在天线0上发送非周期SRS。
可选实施例四
在SRS跳频功能使能的情况下，SRS四天线切换需要考虑A-SRS支持下的SRS跳频问题。
假设发送SRS的天线索引与SRS传输的计数器相关，SRS跳频功能使能情况下，一旦触发了A-SRS用于SRS四天线切换发送，该A-SRS的 频域位置配置为与该A-SRS距离最近的周期SRS的频域位置，同时该A-SRS之后的周期SRS发送，其跳频的频域位置统一循环向后挪一个位置。
例如，图12是根据本发明可选实施例的测量参考信号SRS处理方法的跳频发送SRS的示意图一，如图12所示，第一次SRS传输n'SRS＝nSRS＝0，为周期SRS传输，频域位置为子带0，发送周期SRS的天线索引为TX1，第二次SRS传输n'SRS＝nSRS＝1，为周期SRS传输，频域位置为子带1，发送该周期SRS的天线索引为TX2，第三次SRS传输n'SRS＝nSRS＝2，为周期SRS传输，频域位置为子带2，发送该周期SRS的天线索引为TX3，第四次SRS传输n'SRS＝nSRS＝3，为非周期SRS传输，频域位置为下一次周期SRS传输的频域位置即子带3，发送该非周期SRS的天线索引为TX4，该A-SRS之后下一次A-SRS传输之前周期SRS传输的频域位置统一循环向后挪一个子带位置，例如第四次周期SRS传输的子带位置由原来的子带3向后挪一个子带位置变为子带0，第五次周期SRS传输的子带位置由原来的子带0后向挪一个子带位置变为子带1，第六次周期SRS传输的子带位置由原来的子带1向后挪一个子带位置变为子带2，在下一个A-SRS传输之前，以此类推。
可选实施例五
当SRS跳频功能使能的情况下，SRS四天线切换需要考虑A-SRS支持下的SRS跳频问题。
假设周期SRS和非周期SRS的传输次数进行独立计数，即周期SRS传输的计数器为nSRS，而非周期SRS传输的计数器为nSRS1。周期SRS的发送天线索引只与周期SRS传输的计数器nSRS的值相关，非周期SRS的发送天线索引与非周期SRS传输的计数器nSRS1的值相关或者通过信令直接通知给终端。这时，周期SRS的频域跳变不受非周期SRS发送的影响。其中，当基站的一个下行控制信息只能触发一次非周期SRS传输的时候，非周期SRS的发送天线索引可以通过下行控制信息向终端指示；当基站的一个下 行控制信息能够触发多次连续的非周期SRS传输的时候，非周期SRS的首次发送天线索引由下行控制信息或者高层信令通知给终端或者始终为第四个发送天线，在之后的该下行控制信息触发的非周期SRS的传输中所使用的天线索引与非周期SRS传输的计数器nSRS1的值相关。
例如，图13是根据本发明可选实施例的测量参考信号SRS处理方法的跳频发送SRS的示意图二，如图13所示，周期性SRS传输中，与周期性SRS的计数器相关nSRS，终端分别从四个天线上轮流发送SRS信号，例如第nSRS次周期SRS传输所使用的天线索引为
Figure PCTCN2016102428-appb-000003
其中，
Figure PCTCN2016102428-appb-000004
K为允许SRS跳频的子带数。在第三次和第四次周期SRS的发送之间，终端发送了一次A-SRS，A-SRS的计数器nSRS1此时值为0，A-SRS的频域位置配置为子带0，发送该A-SRS的天线索引配置为第四个天线TX4，在之后的三次A-SRS传输中，频域位置分别占据SRS的不同子带位置，天线索引可以是通过高层信令或者下行控制信息配置的，也可以通过A-SRS的计数器nSRS1的值来确定，例如
Figure PCTCN2016102428-appb-000005
通过这种方式，在4K次SRS传输(其中包括周期SRS传输和非周期SRS传输)就能完成一个轮回的SRS四天线切换发送，即可以获得关于整个带宽上的四个天线上的上行/下行信道状态信息。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来 执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的可选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
通过本发明实施例提供的方案，采用终端从N个天线轮流发送SRS，其中，N≥2，SRS包括：非周期SRS的方式，解决了相关技术中SRS发送时延长的问题，降低了SRS的发送时延。

Claims (40)

  1. 一种测量参考信号SRS处理方法，包括：
    终端从N个天线轮流发送SRS，其中，N≥2，所述SRS包括：非周期SRS。
  2. 根据权利要求1所述的方法，其中，在所述终端从所述N个天线轮流发送所述SRS之前，还包括：
    所述终端接收基站发送的下行控制信息，其中，所述下行控制信息用于请求所述终端发送所述非周期SRS。
  3. 根据权利要求2所述的方法，其中，
    所述下行控制信息包括多个用于触发所述终端进行一次非周期SRS发送的第一下行控制信息；和/或
    所述下行控制信息包括一个用于触发所述终端进行多次连续的非周期SRS发送的第二下行控制信息。
  4. 根据权利要求3所述的方法，其中，
    在所述下行控制信息包括所述多个第一下行控制信息的情况下，所述终端从所述N个天线轮流发送所述SRS包括：所述终端根据所述多个第一下行控制信息或高层信令指定的发送天线索引从所述N个天线轮流发送所述非周期SRS；
    在所述下行控制信息包括一个用于触发所述终端进行多次连续的非周期SRS发送的第二下行控制信息的情况下，所述终端从所述N个天线轮流发送所述SRS包括：首次发送所述非周期SRS时，所述终端根据所述第二下行控制信息或高层信令指定的发送天线索引，或者根据默认发送天线索引发送所述非周期SRS；非首次发送所述非周期SRS时，所述终端根据已发送的非周期SRS的数量确定发送天线索引并根据确定的发送天线索引发送所述非周期SRS。
  5. 根据权利要求2所述的方法，其中，所述下行控制信息还用于指示所述终端是否从所述N个天线轮流发送所述非周期SRS，所述终端在所述下行控制信息指示为是的情况下，从所述N个天线轮流发送所述非周期SRS。
  6. 根据权利要求1所述的方法，其中，所述终端从所述N个天线轮流发送所述SRS包括：
    所述终端在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送所述非周期SRS。
  7. 根据权利要求1所述的方法，其中，所述SRS还包括周期SRS，所述终端从所述N个天线轮流发送所述SRS包括：
    所述终端在用于发送所述周期SRS的子帧和/或符号上从所述N个天线轮流发送所述周期SRS，并在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送所述非周期SRS。
  8. 根据权利要求6或7所述的方法，其中，所述子帧和/或符号包括：时分双工TDD***中特殊子帧的上行导频时隙UpPTS符号。
  9. 根据权利要求8所述的方法，其中，所述特殊子帧的UpPTS符号包括：
    一个特殊子帧中的N个UpPTS符号；或者，
    两个连续的特殊子帧中的N个UpPTS符号，其中，所述两个特殊子帧中，第一个特殊子帧包括A个用于发送所述SRS的UpPTS符号，第二个特殊子帧包括N-A个用于发送所述SRS的UpPTS符号，1≤A<N。
  10. 根据权利要求6至9中任一项所述的方法，其中，所述子帧和/或符号由基站通过下行控制信息和/或高层信令通知给所述终端。
  11. 根据权利要求1所述的方法，其中，所述终端从所述N个天 线轮流发送所述SRS包括：
    所述终端根据基站下发的下行控制信息或高层信令通知的天线索引信息从所述N个天线轮流发送所述SRS。
  12. 根据权利要求1所述的方法，其中，所述SRS还包括周期SRS，所述终端从所述N个天线轮流发送所述SRS包括：
    所述终端根据SRS传输次数确定用于发送所述SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述SRS，其中，所述SRS传输次数为非周期SRS传输次数和周期SRS传输次数之和。
  13. 根据权利要求1所述的方法，其中，所述SRS还包括周期SRS，所述终端从所述N个天线轮流发送所述SRS包括：
    所述终端根据周期SRS传输次数确定用于发送所述周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述周期SRS；和/或
    所述终端根据非周期SRS传输次数或基站下发的下行控制信息或高层信令的通知确定用于发送所述非周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述非周期SRS。
  14. 根据权利要求1所述的方法，其中，所述SRS还包括周期SRS，在SRS频域跳频功能使能的情况下：
    在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置向后循环移位一个跳频子带；或者，
    在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置保持不变。
  15. 根据权利要求14所述的方法，其中，在所述终端从所述N个天线轮流发送所述SRS之前，还包括：
    所述终端接收基站下发的下行控制信息和/或高层信令，并按照所 述下行控制信息和/或高层信令的指示将所述周期SRS的频域位置向后循环移位一个跳频子带；或者，
    所述终端在判断已接收到所述基站下发的用于请求所述终端发送所述非周期SRS且指示所述终端从所述N个天线轮流发送所述非周期SRS的下行控制信息和/或高层信令的情况下，将所述周期SRS的频域位置向后循环移位一个跳频子带；或者，
    所述终端接收基站下发的下行控制信息和/或高层信令，并按照所述下行控制信息和/或高层信令的指示将所述周期SRS的频域位置保持不变；或者，
    所述终端在判断已接收到所述基站下发的用于请求所述终端发送所述非周期SRS且指示所述终端从所述N个天线轮流发送所述非周期SRS的下行控制信息和/或高层信令的情况下，将所述周期SRS的频域位置保持不变。
  16. 根据权利要求1至15中任一项所述的方法，其中，N＝2或4或8。
  17. 一种测量参考信号SRS处理方法，包括：
    基站接收终端从N个天线上轮流发送的SRS，其中，N≥2，所述SRS包括：非周期SRS。
  18. 根据权利要求17所述的方法，其中，在所述基站接收所述终端从所述N个天线上轮流发送的所述SRS之前，还包括：
    所述基站向所述终端发送下行控制信息，其中，所述下行控制信息用于请求所述终端发送所述非周期SRS。
  19. 根据权利要求18所述的方法，其中，
    所述下行控制信息包括多个用于触发所述终端进行一次非周期SRS发送的第一下行控制信息；和/或
    所述下行控制信息包括一个用于触发所述终端进行多次连续的非周期SRS发送的第二下行控制信息。
  20. 根据权利要求18所述的方法，其中，所述下行控制信息还用于指示所述终端是否从所述N个天线轮流发送所述非周期SRS，其中，在所述下行控制信息指示为是的情况下，所述终端从所述N个天线轮流发送所述非周期SRS。
  21. 根据权利要求17所述的方法，其中，所述基站接收所述终端从所述N个天线上轮流发送的所述SRS包括：
    所述基站接收所述终端在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述非周期SRS。
  22. 根据权利要求17所述的方法，其中，所述SRS还包括周期SRS，所述基站接收所述终端从所述N个天线上轮流发送的所述SRS包括：
    所述基站接收所述终端在用于发送所述周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述周期SRS，并接收所述终端在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述非周期SRS。
  23. 根据权利要求21或22所述的方法，其中，所述子帧和/或符号包括：时分双工TDD***中特殊子帧的上行导频时隙UpPTS符号。
  24. 根据权利要求23所述的方法，其中，所述特殊子帧的UpPTS符号包括：
    一个特殊子帧中的N个UpPTS符号；或者，
    两个连续的特殊子帧中的N个UpPTS符号，其中，所述两个特殊子帧中，第一个特殊子帧包括A个用于发送所述SRS的UpPTS符号，第二个特殊子帧包括N-A个用于发送所述SRS的UpPTS符号，1≤A<N。
  25. 根据权利要求21至24中任一项所述的方法，其中，在所述基站接收所述终端从所述N个天线上轮流发送的所述SRS之前，还包括：
    所述基站通过下行控制信息和/或高层信令将所述子帧和/或符号通知给所述终端。
  26. 根据权利要求17所述的方法，其中，在所述基站接收所述终端从所述N个天线上轮流发送的所述SRS之前，还包括：
    所述基站向所述终端发送下行控制信息和/或高层信令；
    其中，所述下行控制信息和/或所述高层信令用于通知所述终端用于从所述N个天线轮流发送所述SRS的天线索引信息；和/或
    在所述SRS还包括周期SRS，并且SRS频域跳频功能使能的情况下，所述下行控制信息和/或所述高层信令用于指示所述终端在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置向后循环移位一个跳频子带，或用于指示所述终端在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置保持不变。
  27. 根据权利要求17至26中任一项所述的方法，其中，N＝2或4或8。
  28. 一种测量参考信号SRS处理装置，应用于终端，其中，所述装置包括：
    第一发送模块，设置为从N个天线轮流发送SRS，其中，N≥2，所述SRS包括：非周期SRS。
  29. 根据权利要求28所述的装置，其中，所述装置还包括：
    第一接收模块，设置为接收基站发送的下行控制信息，其中，所述下行控制信息用于请求终端发送所述非周期SRS。
  30. 根据权利要求28所述的装置，其中，所述第一发送模块设置为：
    在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送所述非周期SRS。
  31. 根据权利要求28所述的装置，其中，所述第一发送模块设置为：
    在用于发送所述周期SRS的子帧和/或符号上从所述N个天线轮流发送所述周期SRS，并在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送所述非周期SRS。
  32. 根据权利要求28所述的装置，其中，所述第一发送模块设置为：
    根据基站下发的下行控制信息或高层信令通知的天线索引信息从所述N个天线轮流发送所述SRS。
  33. 根据权利要求28所述的装置，其中，所述第一发送模块设置为：
    在所述SRS还包括周期SRS的情况下，根据SRS传输次数确定用于发送所述SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述SRS，其中，所述SRS传输次数为非周期SRS传输次数和周期SRS传输次数之和。
  34. 根据权利要求28所述的装置，其中，所述第一发送模块设置为：
    在所述SRS还包括周期SRS的情况下，根据周期SRS传输次数确定用于发送所述周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述周期SRS；和/或
    在所述SRS还包括周期SRS的情况下，根据非周期SRS传输次 数或基站下发的下行控制信息或高层信令的通知确定用于发送所述非周期SRS的天线索引，并根据确定的天线索引在对应的天线上发送所述非周期SRS。
  35. 一种测量参考信号SRS处理装置，应用于基站，其中，所述装置包括：
    第二接收模块，设置为接收终端从N个天线上轮流发送的SRS，其中，N≥2，所述SRS包括：非周期SRS。
  36. 根据权利要求35所述的装置，其中，所述装置还包括：
    第二发送模块，设置为在所述第二接收模块接收所述终端从所述N个天线上轮流发送的所述SRS之前，向所述终端发送下行控制信息，其中，所述下行控制信息用于指示所述终端发送所述非周期SRS。
  37. 根据权利要求35所述的装置，其中，所述第二接收模块设置为：
    接收所述终端在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述非周期SRS。
  38. 根据权利要求35所述的装置，其中，所述第二接收模块设置为：
    在所述SRS还包括周期SRS的情况下，接收所述终端在用于发送所述周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述周期SRS，并接收所述终端在用于发送所述非周期SRS的子帧和/或符号上从所述N个天线轮流发送的所述非周期SRS。
  39. 根据权利要求37或38所述的装置，其中，所述装置还包括：
    通知模块，设置为通过下行控制信息和/或高层信令将所述子帧和/或符号通知给所述终端。
  40. 根据权利要求35所述的装置，其中，所述装置还包括：
    第三发送模块，设置为向所述终端发送下行控制信息和/或高层信令；
    其中，所述下行控制信息和/或所述高层信令用于通知所述终端用于从所述N个天线轮流发送所述SRS的天线索引信息；和/或
    在所述SRS还包括周期SRS，并且所述SRS频域跳频功能使能的情况下，所述下行控制信息和/或所述高层信令用于指示所述终端在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置向后循环移位一个跳频子带，或用于指示所述终端在所述非周期SRS发送之后，在下一次非周期SRS发送之前的所述周期SRS的频域位置保持不变。
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