Terminal, base station, and method for configuring and transmitting sounding reference signals

Abstract

The present invention relates to the field of wireless communication technologies, and in particular, to a terminal, a base station, and a configuration and transmission method for sounding reference signal (SRS), so as to provide more transmission resources for SRS, which can meet the requirements of uplink channel quality measurement and channel estimation in systems such as short-delay systems and millimeter-wave systems. In a method for configuring SRS provided in an embodiment of the present invention, a base station sends configuration information of SRS subframes to terminals in a current cell, instructing the terminals to send SRS on the SRS subframes according to the received configuration information; wherein, the SRS subframes are uplink subframes, or subframes in which the number of uplink symbols is not less than the number of downlink symbols; and all uplink symbols in the SRS subframes can be used to carry SRS. Compared with the current LTE system, there are more transmission resources available for transmitting SRS in the embodiments of the present invention.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular, to a terminal, a base station, and a method for configuring and transmitting a sounding reference signal (SRS). Background Art

[0002] The sounding reference signal SRS is an uplink sounding reference signal in a Long Term Evolution (LTE) system, and the base station performs uplink channel estimation based on the SRS sent by the terminal. Moreover, in a Time Division Duplexing (TDD) LTE system, due to the reciprocity of the uplink and downlink channels, the base station can also perform downlink channel estimation based on the SRS. Further, the downlink transmission can be scheduled according to the result of the downlink channel estimation.

[0003] In the current SRS transmission mode in the LTE system, there are few physical resources available for transmitting the SRS, which cannot meet the transmission requirements of short-delay systems, millimeter-wave systems, etc. Therefore, there is an urgent need for an SRS transmission mode that can meet the requirements of uplink channel quality measurement and channel estimation in short-delay systems and millimeter-wave systems. Summary of the Invention

[0004] Embodiments of the present invention provide a terminal, a base station, and a method for configuring and transmitting an SRS, so as to provide more transmission resources for the SRS, which can meet the requirements of uplink channel quality measurement and channel estimation in short-delay systems and millimeter-wave systems, etc.

[0005] In a first aspect, an embodiment of the present invention provides a method for configuring a sounding reference signal SRS, including:

[0006] The base station sends configuration information of an SRS subframe to a terminal in the current cell, instructing the terminal to send an SRS on the SRS subframe according to the received configuration information;

[0007] wherein the SRS subframe is an uplink subframe or a subframe in which the number of uplink symbols is not less than the number of downlink symbols;

[0008] and all uplink symbols in the SRS subframe can be used to carry the SRS.

[0009] Combined with the first aspect, in a first possible implementation manner,

[0010] The position of the SRS subframe in a radio frame is determined according to the frame number of the radio frame, the period of the SRS subframe of the current cell and an SRS subframe offset parameter determined;

[0011] The configuration information includes: information for indicating the value of the and information for indicating the value of the ; or

[0012] The position of the SRS subframe in a radio frame is predefined.

[0013] Combined with the first possible implementation manner of the first aspect, in the second possible implementation manner, the position of the SRS subframe that the terminal can use to send SRS in a radio frame is determined according to the frame number of the radio frame, the period of the SRS subframe of the terminal and the SRS subframe offset of the terminal ;

[0014] The configuration information further includes:

[0015] information for indicating the value of t of the terminal, where the is t times the , and

[0016] information for indicating the value of the SRS subframe offset parameter of the terminal.

[0017] Combined with the first aspect or the first possible implementation manner of the first aspect, in the second possible implementation manner,

[0018] The position of the SRS subframe that the terminal can use to send SRS in a radio frame is determined according to the frame number of the radio frame, the period of the SRS subframe of the terminal and the SRS subframe offset parameter of the terminal;

[0019] The configuration information includes:

[0020] information for indicating the value of the terminal; and

[0021] information for indicating the value of the SRS subframe offset parameter of the terminal.

[0022] Combined with the first aspect, or any one of the first to third possible implementation manners of the first aspect, in the fourth possible implementation manner,

[0023] The symbol transmission mode of the terminal on the SRS subframe includes one of the following modes:

[0024] The terminal sends SRS on all symbols of the SRS subframe; or

[0025] The terminal transmits SRS on multiple adjacent symbols in the SRS subframe; or

[0026] The terminal transmits SRS on symbols that are spaced apart by a specified number of symbols from each other in the SRS subframe;

[0027] The configuration information further includes: indication information for indicating the symbol transmission mode of the terminal in the SRS subframe; or

[0028] The symbol transmission mode of the terminal in the SRS subframe is pre-defined.

[0029] Combined with the fourth possible implementation manner of the first aspect, in the fifth possible implementation manner, if the symbol transmission mode of the terminal in the SRS subframe is: the terminal transmits SRS on multiple adjacent symbols in the SRS subframe or the terminal transmits SRS on symbols that are spaced apart by a specified number of symbols from each other in the SRS subframe, then

[0030] The configuration information further includes:

[0031] Information for indicating the starting position of the symbol on which the terminal transmits SRS in the SRS subframe in the SRS subframe.

[0032] Combined with the fifth possible implementation manner of the first aspect, in the sixth possible implementation manner, the configuration information further includes:

[0033] Information for indicating the total number of symbols on which the terminal transmits SRS in the SRS subframe; and / or

[0034] Information for indicating the ending position of the symbol on which the terminal transmits SRS in the SRS subframe in the SRS subframe.

[0035] Combined with the fourth possible implementation manner of the first aspect, in the seventh possible implementation manner, if the symbol transmission mode of the terminal in the SRS subframe is: the terminal transmits SRS on multiple adjacent symbols in the SRS subframe or the terminal transmits SRS on symbols that are spaced apart by a specified number of symbols from each other in the SRS subframe, then the configuration information further includes at least one of the following information:

[0036] Information for indicating the time slot occupied by the terminal transmitting SRS in the SRS subframe;

[0037] Information for indicating the starting position of the symbol on which the terminal transmits SRS in each time slot of the SRS subframe in the SRS subframe.

[0038] Combined with the seventh possible implementation manner of the first aspect, in the eighth possible implementation manner, the configuration information further includes:

[0039] Information for indicating the total number of symbols for the terminal to transmit SRS within a time slot on the SRS subframe; and / or

[0040] Information for indicating the end position of the symbols for the terminal to transmit SRS in each time slot of the SRS subframe.

[0041] Combined with the first aspect, or any one of the first to eighth possible implementation manners of the first aspect, in the ninth possible implementation manner,

[0042] The manner in which the frequency domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe is one of the following manners:

[0043] The frequency domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are the same;

[0044] The frequency domain resources occupied by the SRS transmitted by the terminal on each time slot of the SRS subframe are different;

[0045] The frequency domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are different;

[0046] The configuration information further includes: indication information for indicating the manner in which the frequency domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe; or

[0047] The manner in which the frequency domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe is predefined.

[0048] Combined with the ninth possible implementation manner of the first aspect, in the tenth possible implementation manner,

[0049] If the manner in which the frequency domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe is: the frequency domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are the same, then

[0050] The frequency domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are determined according to the following information, and at least one of the following information is sent by the base station to the terminal:

[0051] Cell common bandwidth information C SRS , for indicating the bandwidth occupied by the terminal in the current cell to transmit SRS;

[0052] The terminal-specific bandwidth information B of the terminalSRS , used to indicate the bandwidth occupied by the terminal for sending SRS under the bandwidth indicated by the cell common bandwidth information C SRS ;

[0053] The frequency domain starting position information n of the terminal RRC , used to indicate the frequency domain starting position of the bandwidth occupied by the terminal for sending SRS.

[0054] Combined with the tenth possible implementation manner of the first aspect, in the eleventh possible implementation manner,

[0055] After the base station sends the configuration information of the SRS subframe to the terminal, it further includes:

[0056] The base station starts from the frequency domain starting position indicated by n RRC , and within the bandwidth indicated by B SRS , receives the SRS sent by the terminal.

[0057] Combined with the tenth possible implementation manner of the first aspect, in the twelfth possible implementation manner,

[0058] The configuration information further includes at least one of the following information:

[0059] The cell common bandwidth information C SRS ;

[0060] The terminal-specific bandwidth information B of the terminal SRS ;

[0061] The frequency domain starting position information n of the terminal RRC .

[0062] Combined with the ninth possible implementation manner of the first aspect, in the thirteenth possible implementation manner,

[0063] If the frequency domain resource manner occupied by the SRS sent by the terminal on each symbol of the SRS subframe is: the frequency domain resources occupied by the SRS sent by the terminal on different time slots of the SRS subframe are different, then

[0064] The frequency domain resources occupied by the SRS sent by the terminal on each symbol of the time slot with the serial number n s of the SRS subframe are determined according to the following information, and at least one of the following information is sent by the base station to the terminal:

[0065] Cell common bandwidth information C SRS , used to indicate the bandwidth occupied by the terminal for sending SRS within the current cell;

[0066] The terminal at the serial number n sTerminal dedicated bandwidth information on the time slot Used to indicate that under the bandwidth indicated by the cell common bandwidth information C SRS The bandwidth occupied by the terminal for transmitting SRS on the time slot with serial number n s ;

[0067] The frequency domain starting position information of the terminal on the time slot with serial number n s Used to indicate the frequency domain starting position of the bandwidth occupied by the terminal for transmitting SRS on the time slot with serial number n in the SRS subframe In combination with the thirteenth possible implementation manner of the first aspect, in the fourteenth possible implementation manner s The configuration information further includes at least one of the following information: the cell common bandwidth information C

[0068] ;

[0069] The terminal dedicated bandwidth information on the time slot with serial number n SRS ;

[0070] The frequency domain starting position information of the terminal on the time slot with serial number n s ;

[0071] In combination with the thirteenth possible implementation manner of the first aspect, in the fifteenth possible implementation manner s The configuration information further includes at least one of the following information

[0072] ;

[0073] The cell common bandwidth information C

[0074] ; SRS The dedicated bandwidth information B of the terminal

[0075] The dedicated bandwidth information B of the terminal is used to indicate that under the bandwidth indicated by the cell common information C SRS The bandwidth occupied by the terminal for transmitting SRS SRS ; SRS The terminal dedicated bandwidth information on the time slot with serial number n

[0076] Is determined according to the following formula s ; Where

[0077] ; Is the maximum value in the value range of B SRS ;

[0078] Combined with the thirteenth or fifteenth possible implementation manner of the first aspect, in the sixteenth possible implementation manner, the configuration information further includes: the frequency-domain starting position information n of the terminal RRC , the frequency-domain starting position information n of the terminal RRC for indicating the frequency-domain starting position of the bandwidth occupied by the terminal for transmitting SRS; the frequency-domain starting position information of the terminal on the time slot with the serial number n s is determined according to the following formula: is determined according to the following formula:

[0079] or

[0080] and

[0081] wherein, is the maximum value in the value range of n RRC , represents that the hopping granularity is times of the total bandwidth, M takes positive integers such as 2, 3, 4,..., and the value is predefined, is the number of RBs included in the minimum bandwidth for SRS transmission, and the value is predefined.

[0082] Combined with the ninth possible implementation manner of the first aspect, in the seventeenth possible implementation manner,

[0083] If the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are such that the frequency-domain resources occupied by the SRS transmitted by the terminal on different time slots of the SRS subframe are different, then

[0084] the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the time slot with the serial number n s of the SRS subframe are determined according to the following information, and at least one of the following information is sent by the base station to the terminal:

[0085] Cell common bandwidth information C SRS , for indicating the bandwidth occupied by the terminal in the current cell for transmitting SRS;

[0086] The same terminal dedicated bandwidth information B of the terminal on each time slot used for transmitting SRS SRS , for indicating that under the bandwidth indicated by the cell common bandwidth information C SRS , the same bandwidth occupied by the terminal for transmitting SRS on each time slot used for transmitting SRS;

[0087] The frequency-domain starting position information of the terminal on the time slot with the serial number n s of the SRS subframe For indicating that the terminal transmits the frequency-domain starting position of the bandwidth occupied by the SRS in the time slot with the serial number n in the SRS subframe s in the time slot

[0088] Combined with the seventeenth possible implementation manner of the first aspect, in the eighteenth possible implementation manner

[0089] the configuration information further includes at least one of the following information: the cell common bandwidth information C SRS ;

[0090] the same terminal-specific bandwidth information B of the terminal on each time slot used for transmitting the SRS SRS ;

[0091] the frequency-domain starting position information of the terminal in the time slot with the serial number n s in the time slot

[0092] Combined with the seventeenth possible implementation manner of the first aspect, in the nineteenth possible implementation manner

[0093] the configuration information further includes at least one of the following information:

[0094] the cell common bandwidth information C SRS ;

[0095] the same terminal-specific bandwidth information B of the terminal on each time slot used for transmitting the SRS SRS .

[0096] Combined with the seventeenth or nineteenth possible implementation manner of the first aspect, in the twentieth possible implementation manner

[0097] the configuration information further includes: the frequency-domain starting position information n of the terminal RRC , the frequency-domain starting position information n of the terminal RRC for indicating the frequency-domain starting position of the bandwidth occupied by the terminal for transmitting the SRS;

[0098] the frequency-domain starting position information of the terminal in the time slot with the serial number n s in the time slot is determined according to the following formula:

[0099] or

[0100] and

[0101] wherein, is the maximum value in the value range of n RRC in the value range, It is represented that the granularity of frequency hopping is times the total bandwidth, M takes positive integers, such as 2, 3, 4, …, and the value is predefined. is the number of RBs included in the minimum bandwidth for SRS transmission, and the value is predefined.

[0102] Combined with the ninth possible implementation manner of the first aspect, in the twenty - first possible implementation manner,

[0103] If the frequency - domain resource occupied by the SRS sent by the terminal on each symbol of the SRS sub - frame is different for the SRS sent by the terminal on different symbols of the SRS sub - frame, then

[0104] the frequency - domain resource occupied by the SRS sent by the terminal on the symbol with serial number l in the SRS sub - frame is determined according to the following information, and at least one of the following information is sent by the base station to the terminal:

[0105] Cell - common bandwidth information C SRS , which is used to indicate the bandwidth occupied by the terminal in the current cell for sending SRS;

[0106] Terminal - specific bandwidth information of the terminal on the symbol with serial number l is used to indicate that under the bandwidth indicated by the cell - common information C SRS , the bandwidth occupied by the terminal for sending SRS on the symbol with serial number l;

[0107] Frequency - domain starting - position information of the terminal on the symbol with serial number l is used to indicate the frequency - domain starting position of the bandwidth occupied by the terminal for sending SRS on the symbol with serial number l in the SRS sub - frame.

[0108] Combined with the twenty - first possible implementation manner of the first aspect, in the twenty - second possible implementation manner,

[0109] The configuration information further includes at least one of the following information:

[0110] The cell - common bandwidth information C SRS ;

[0111] Terminal - specific bandwidth information of the terminal on the symbol with serial number l

[0112] Frequency - domain starting - position information of the terminal on the symbol with serial number l

[0113] Combined with the twenty - first possible implementation manner of the first aspect, in the twenty - third possible implementation manner,

[0114] The configuration information further includes at least one of the following information: the cell common bandwidth information C SRS ;

[0115] the dedicated bandwidth information B of the terminal SRS , the dedicated bandwidth information B of the terminal SRS is used to indicate the bandwidth occupied by the terminal to send SRS under the bandwidth indicated by the cell common information C SRS ;

[0116] The dedicated bandwidth information of the terminal on the symbol with serial number l is determined according to the following formula:

[0117] wherein, is the maximum value in the value range of B SRS ;

[0118] Combined with the twenty-first or twenty-third possible implementation manner of the first aspect, in the twenty-fourth possible implementation manner,

[0119] the frequency domain starting position information n of the terminal RRC , the frequency domain starting position information n of the terminal RRC is used to indicate the frequency domain starting position of the bandwidth occupied by the terminal to send SRS; the frequency domain starting position information of the terminal on the symbol with serial number l is determined according to the following formula:

[0120] or

[0121] and

[0122] wherein, is the maximum value in the value range of n RRC ; represents that the frequency hopping granularity is times of the total bandwidth, M takes positive integers, such as 2, 3, 4,..., and the value is predefined, is the number of RBs included in the minimum bandwidth of SRS transmission, and the value is predefined.

[0123] Combined with the ninth possible implementation manner of the first aspect, in the twenty-fifth possible implementation manner,

[0124] If the frequency domain resources occupied by the SRS sent by the terminal on each symbol of the SRS subframe are different for the SRS sent by the terminal on different symbols of the SRS subframe, then

[0125] The frequency-domain resources occupied by the SRS transmitted by the terminal on the symbol with sequence number l in the SRS subframe are determined according to the following information:

[0126] Cell common bandwidth information C SRS , which is used to indicate the bandwidth occupied by the SRS transmitted by the terminal in the current cell;

[0127] The same terminal-specific bandwidth information B of the terminal on each symbol used for transmitting the SRS SRS , which is used to indicate that, under the bandwidth indicated by the cell common information C SRS , the terminal occupies the same bandwidth for transmitting the SRS on each symbol used for transmitting the SRS;

[0128] The frequency-domain starting position information of the terminal on the symbol with sequence number l , which is used to indicate the frequency-domain starting position of the bandwidth occupied by the SRS transmitted by the terminal on the symbol with sequence number l in the SRS subframe.

[0129] Combined with the twenty-fifth possible implementation manner of the first aspect, in the twenty-sixth possible implementation manner,

[0130] The configuration information further includes at least one of the following information:

[0131] The cell common bandwidth information C SRS ;

[0132] The same terminal-specific bandwidth information B of the terminal on each symbol used for transmitting the SRS SRS ;

[0133] The frequency-domain starting position information of the terminal on the symbol with sequence number l

[0134] Combined with the twenty-fifth possible implementation manner of the first aspect, in the twenty-seventh possible implementation manner,

[0135] The configuration information further includes at least one of the following information:

[0136] The cell common bandwidth information C SRS ;

[0137] The same terminal-specific bandwidth information B of the terminal on each symbol used for transmitting the SRS SRS .

[0138] Combined with the twenty-fifth or twenty-seventh possible implementation manner of the first aspect, in the twenty-eighth possible implementation manner,

[0139] The configuration information further includes: the frequency-domain starting position information n of the terminal RRC, the frequency-domain starting position information n of the terminal RRC is used to indicate the frequency-domain starting position of the bandwidth occupied by the terminal for transmitting SRS; the frequency-domain starting position information of the terminal on the symbol with serial number l is determined according to the following formula:

[0140] or

[0141] and

[0142] wherein, is the maximum value in the value range of n RRC , represents that the hopping granularity is times of the total bandwidth, M takes positive integer values such as 2, 3, 4,..., and the value is predefined, is the number of RBs included in the minimum bandwidth for SRS transmission, and the value is predefined.

[0143] Combined with any one of the ninth to twenty-eighth possible implementation manners of the first aspect, in the twenty-ninth possible implementation manner,

[0144] the terminal transmits SRS using a single antenna; for each PRB in each symbol occupied by the SRS transmitted by the terminal, the terminal occupies non-consecutive subcarriers in this PRB of this symbol, and the occupied subcarriers are spaced n comb subcarriers apart; or

[0145] the terminal transmits SRS using multiple antennas; for each PRB in a symbol occupied by the SRS transmitted by the terminal, the terminal occupies non-consecutive subcarriers in this PRB of this symbol, and for one antenna used by the terminal, the subcarriers occupied by the SRS transmitted through this antenna are spaced n comb subcarriers apart;

[0146] The configuration information further includes: information for indicating the value of n comb .

[0147] Combined with the twenty-ninth possible implementation manner of the first aspect, in the thirtieth possible implementation manner,

[0148] The manner in which the terminal transmits the SRS occupying the comb subcarriers on each symbol of the SRS subframe is one of the following manners:

[0149] For different symbols occupied by the SRS transmitted by the terminal, the terminal occupies the same comb subcarriers in the symbol; or

[0150] For symbols in different time slots occupied by the SRS sent by the terminal, the terminal occupies different comb subcarriers in the symbols; or

[0151] For different symbols occupied by the SRS sent by the terminal, the terminal occupies different comb subcarriers in the symbols;

[0152] The configuration information further includes: indication information for indicating the manner in which the terminal occupies the comb subcarriers of the SRS sent on each symbol of the SRS subframe; or

[0153] The manner in which the terminal occupies the comb subcarriers of the SRS sent on each symbol of the SRS subframe is predefined.

[0154] Combined with the thirtieth possible implementation manner of the first aspect, in the thirty - first possible implementation manner,

[0155] If the manner in which the terminal occupies the comb subcarriers of the SRS sent on each symbol of the SRS subframe is: for different symbols occupied by the SRS sent by the terminal, the terminal occupies the same comb subcarrier in the symbols, then

[0156] The configuration information further includes: information for indicating the position of the starting subcarrier in the PRB among the subcarriers occupied by the SRS sent by the terminal; or

[0157] Among the subcarriers occupied by the SRS sent by the terminal, the position of the starting subcarrier in the PRB is pre - agreed by the protocol.

[0158] Combined with the thirtieth possible implementation manner of the first aspect, in the thirty - second possible implementation manner,

[0159] If the manner in which the terminal occupies the comb subcarriers of the SRS sent on each symbol of the SRS subframe is: for symbols in different time slots occupied by the SRS sent by the terminal, the terminal occupies different comb subcarriers in the symbols, then

[0160] The configuration information further includes:

[0161] For each time slot of the SRS subframe available to the terminal, information for indicating the position of the starting subcarrier in the PRB among the subcarriers occupied by the SRS that the terminal can send on this time slot.

[0162] Combined with the thirtieth possible implementation manner of the first aspect, in the thirty - third possible implementation manner,

[0163] If the way in which the SRS transmitted by the terminal on each symbol of the SRS subframe occupies the comb subcarriers is that for the symbols of the SRS transmitted by the terminal that are in different time slots, the terminal occupies different comb subcarriers in the symbols;

[0164] The configuration information further includes: a parameter For the time slot with the serial number n of the SRS subframe available to the terminal s the parameter of the terminal is determined according to the formula determined.

[0165] Combined with the thirty-third possible implementation manner of the first aspect, in the thirty-fourth possible implementation manner,

[0166] After the base station sends the configuration information of the SRS subframe to the terminal, it further includes:

[0167] For a PRB in the time slot with the serial number n in the SRS subframe used by the terminal to send the SRS s the base station starts receiving the SRS sent by the terminal from the starting subcarrier indicated in this PRB wherein.

[0168] Combined with the thirtieth possible implementation manner of the first aspect, in the thirty-fifth possible implementation manner,

[0169] If the way in which the SRS transmitted by the terminal on each symbol of the SRS subframe occupies the comb subcarriers is that for different symbols of the SRS transmitted by the terminal, the terminal occupies different comb subcarriers in the symbols, then

[0170] For each symbol of the SRS subframe available to the terminal, the configuration information further includes:

[0171] Information indicating the position of the starting subcarrier in this PRB among the subcarriers occupied by the SRS that the terminal can transmit on this symbol.

[0172] Combined with the thirtieth possible implementation manner of the first aspect, in the thirty-sixth possible implementation manner,

[0173] If the way in which the SRS transmitted by the terminal on each symbol of the SRS subframe occupies the comb subcarriers is that for different symbols of the SRS transmitted by the terminal, the terminal occupies different comb subcarriers in the symbols, then

[0174] The configuration information further includes:

[0175] parameter For the symbol with sequence number l of the SRS subframe available for the terminal, the parameter of the terminal is determined according to the formula determined

[0176] Combined with the thirty-sixth possible implementation manner of the first aspect, in the thirty-seventh possible implementation manner,

[0177] After the base station sends the configuration information of the SRS subframe to the terminal, it further includes:

[0178] For a PRB in the symbol with sequence number l in the SRS subframe used by the terminal to send SRS, the base station starts receiving the SRS sent by the terminal from the starting subcarrier indicated in this PRB indicated

[0179] Combined with the first aspect, or any one of the first to thirty-seventh possible implementation manners of the first aspect, in the thirty-eighth possible implementation manner,

[0180] The SRS basic sequences used by the SRSs sent by the terminal on different symbols of an SRS subframe are the same; or

[0181] The SRS basic sequences used by the SRSs sent by the terminal on different time slots of an SRS subframe are different; or

[0182] The SRS basic sequences used by the SRSs sent by the terminal on different symbols of an SRS subframe are different

[0183] Combined with the first aspect, or any one of the first to thirty-eighth possible implementation manners of the first aspect, in the thirty-ninth possible implementation manner,

[0184] If the terminal uses multiple antennas to send SRS, then

[0185] The cyclic shift of the SRS sequence of the SRS sent by the terminal on the antenna with sequence number satisfies the formula satisfies the formula

[0186] where N ap is the number of antennas used by the terminal to send SRS, is a parameter used to determine the cyclic shift of the SRS sequence of the SRS sent by the terminal on each antenna,

[0187] The configuration information further includes: information for indicating the value of the value; or the The value is predefined.

[0188] Combined with the first aspect, or any one of the first to thirty-ninth possible implementations of the first aspect, in the fortieth possible implementation,

[0189] For a terminal that uses multiple antennas to transmit SRS in the current cell, the SRSs transmitted on different antennas occupy different symbols.

[0190] Combined with the first aspect, or any one of the first to fortieth possible implementations of the first aspect, in the forty-first possible implementation,

[0191] For a terminal that uses multiple antennas to transmit SRS in the current cell, the SRSs transmitted on different antennas occupy different comb subcarriers in the symbols;

[0192] The position of the comb subcarrier occupied by the SRS transmitted on the antenna with antenna port number p is determined according to the parameter determined, and the parameter is determined according to the following formula:

[0193]

[0194] where, is the antenna serial number corresponding to the antenna port number p;

[0195] The configuration information further includes: information for indicating the value and information for indicating the n comb value.

[0196] Combined with the first aspect, or any one of the first to forty-first possible implementations of the first aspect, in the forty-second possible implementation,

[0197] The SRS subframe can also be used to transmit a physical uplink control channel PUCCH.

[0198] Second aspect, an embodiment of the present invention provides a sounding reference signal SRS transmission method, including:

[0199] A terminal receives configuration information of an SRS subframe sent by a base station in the current cell where the terminal is located;

[0200] The terminal determines the configuration of the SRS subframe according to the received configuration information;

[0201] The terminal transmits SRS on the SRS subframe according to the determined configuration of the SRS subframe;

[0202] Among them, the SRS subframe is an uplink subframe, or a subframe in which the number of uplink symbols is not less than the number of downlink symbols;

[0203] And all uplink symbols in the SRS subframe can be used to carry the SRS.

[0204] Combined with the second aspect, in the first possible implementation manner,

[0205] The configuration information includes: information indicating the value of the period of the SRS subframe of the current cell and information indicating the value of the SRS subframe offset ; The terminal determines the configuration of the SRS subframe according to the received configuration information, including: the terminal determines the period of the SRS subframe of the current cell according to the received information indicating the value of the period of the SRS subframe ; The terminal determines the according to the information indicating the value of the SRS subframe offset ; The terminal determines the position of the SRS subframe in the radio frame according to the frame number of the radio frame, the and the and the ; Or

[0206] The position of the SRS subframe in a radio frame is predefined; The terminal sends the SRS on the SRS subframe, including: the terminal sends the SRS at the predefined position.

[0207] Combined with the first possible implementation manner of the second aspect, in the second possible implementation manner, the terminal determines the subframe number of the SRS subframe in the radio frame according to one of the following formulas:

[0208]

[0209]

[0210]

[0211]

[0212] Among them, n subf is the number of subframes included in a radio frame, n f is the frame number of the radio frame, is the SRS subframe offset parameter, is the subframe number of the SRS subframe in the radio frame.

[0213] Combined with the first or second possible implementation manner of the second aspect, in the third possible implementation manner,

[0214] The SRS subframes available for the terminal to transmit the SRS have a period The is t times that of the , where t is a positive integer;

[0215] The configuration information further includes:

[0216] Information for indicating the value of t of the terminal.

[0217] Combined with the third possible implementation manner of the second aspect, in the fourth possible implementation manner, the terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0218] The terminal determines that: after the subframe of the information for indicating the value of t of the terminal is received, the first SRS subframe available for the terminal to transmit the SRS is the starting position of the SRS subframe for the terminal to transmit the SRS; or

[0219] The terminal determines that: the SRS subframe available for the terminal to transmit the SRS after d subframes spaced from the subframe of the information for indicating the value of t of the terminal after the subframe of the information for indicating the value of t of the terminal is received is the starting position of the SRS subframe for the terminal to transmit the SRS, where the value of d is predefined.

[0220] Combined with the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in the fifth possible implementation manner,

[0221] The SRS subframes available for the terminal to transmit the SRS have a period

[0222] The configuration information further includes:

[0223] Information for indicating the value of the terminal.

[0224] Combined with the fifth possible implementation manner of the second aspect, in the sixth possible implementation manner, the terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0225] The terminal determines that: the first SRS subframe available for the terminal to transmit the SRS after the subframe of the information for indicating the value of the terminal is received is the starting position of the SRS subframe for the terminal to transmit the SRS; or

[0226] The terminal determines that: after the subframe of the information for indicating the After the subframe of the information of the value or the information indicating the value of t of the terminal, the first SRS subframe available for the terminal to send SRS after d subframes from this subframe is the starting position of the SRS subframe for the terminal to send SRS, where the value of d is predefined.

[0227] Combined with the third or fifth possible implementation manner of the second aspect, in the seventh possible implementation manner,

[0228] The configuration information further includes:

[0229] Information for indicating the SRS subframe offset of the terminal Value information;

[0230] Based on the received configuration information, the terminal determines the configuration of the SRS subframe, including:

[0231] The terminal determines the position of the SRS subframe available for sending SRS in the radio frame according to the frame number of the radio frame, the period of the SRS subframe of the terminal And the SRS subframe offset of the terminal.

[0232] In the second aspect, or any one of the first to seventh possible implementation manners of the second aspect, in the eighth possible implementation manner,

[0233] The symbol transmission manner of the terminal on the SRS subframe includes one of the following manners:

[0234] The terminal sends SRS on all symbols of the SRS subframe; or

[0235] The terminal sends SRS on adjacent multiple symbols of the SRS subframe; or

[0236] The terminal sends SRS on each symbol with a specified number of symbols spaced apart from each other on the SRS subframe;

[0237] The configuration information further includes: indication information for indicating the symbol transmission manner of the terminal on the SRS subframe; or

[0238] The symbol transmission manner of the terminal on the SRS subframe is predefined.

[0239] Combined with the eighth possible implementation manner of the second aspect, in the ninth possible implementation manner, if the terminal determines that the symbol transmission manner of the terminal on the SRS subframe is: the terminal sends SRS on adjacent multiple symbols of the SRS subframe or the terminal sends SRS on each symbol with a specified number of symbols spaced apart from each other on the SRS subframe, then

[0240] The configuration information further includes: information for indicating the starting position in the SRS subframe of the symbol on which the terminal transmits the SRS in the SRS subframe.

[0241] Combined with the ninth possible implementation manner of the second aspect, in the tenth possible implementation manner, the configuration information further includes:

[0242] Information for indicating the total number of symbols on which the terminal transmits the SRS in the SRS subframe; and / or

[0243] Information for indicating the ending position in the SRS subframe of the symbol on which the terminal transmits the SRS in the SRS subframe.

[0244] Combined with the eighth possible implementation manner of the second aspect, in the eleventh possible implementation manner, if the terminal determines that the symbol transmission mode of the terminal in the SRS subframe is: the terminal transmits the SRS on multiple adjacent symbols in the SRS subframe or the terminal transmits the SRS on each symbol with a specified number of symbols in between in the SRS subframe, then the configuration information further includes at least one of the following information:

[0245] Information for indicating the time slot occupied by the SRS transmitted by the terminal in the SRS subframe;

[0246] Information for indicating the starting position in each time slot of the SRS subframe of the symbol on which the terminal transmits the SRS in the SRS subframe.

[0247] Combined with the eleventh possible implementation manner of the second aspect, in the twelfth possible implementation manner, the configuration information further includes:

[0248] Information for indicating the total number of symbols on which the terminal transmits the SRS within one time slot in the SRS subframe; and / or

[0249] Information for indicating the ending position in each time slot of the SRS subframe of the symbol on which the terminal transmits the SRS in the SRS subframe.

[0250] Combined with the second aspect, or any one of the first to twelfth possible implementation manners of the second aspect, in the thirteenth possible implementation manner, the frequency domain resource manner occupied by the SRS transmitted by the terminal on each symbol in the SRS subframe is one of the following manners:

[0251] The frequency domain resources occupied by the SRS transmitted by the terminal on each symbol in the SRS subframe are the same;

[0252] The frequency-domain resources occupied by the SRS transmitted by the terminal on each time slot of the SRS subframe are different;

[0253] The frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are different;

[0254] The configuration information further includes: indication information for indicating the manner of the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe; or

[0255] The manner of the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe is predefined.

[0256] Combined with the thirteenth possible implementation manner of the second aspect, in the fourteenth possible implementation manner,

[0257] If the manner of the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe is: the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are the same, then

[0258] The configuration information further includes at least one of the following information:

[0259] Cell common bandwidth information C SRS , for indicating the bandwidth occupied by the terminal in the current cell when transmitting the SRS;

[0260] Terminal-specific bandwidth information B of the terminal SRS , for indicating, under the bandwidth indicated by the cell common information C SRS , the bandwidth occupied by the terminal when transmitting the SRS;

[0261] Frequency-domain starting position information n of the terminal RRC , for indicating the frequency-domain starting position of the bandwidth occupied by the terminal when transmitting the SRS.

[0262] Combined with the fourteenth possible implementation manner of the second aspect, in the fifteenth possible implementation manner,

[0263] The terminal determines the configuration of the SRS subframe according to the received configuration information, including: the terminal determines the frequency-domain resources it occupies according to the following information, and at least one of the following information is obtained by the terminal from the configuration message sent by the base station:

[0264] Cell common bandwidth information C SRS ;

[0265] Terminal-specific bandwidth information B of the terminal SRS ;

[0266] The frequency-domain starting position information n of the terminal RRC ;

[0267] The terminal sends SRS on the SRS subframe according to the determined configuration of the SRS subframe, including:

[0268] The terminal starts from the frequency-domain starting position indicated by n RRC and sends SRS within the bandwidth indicated by B SRS .

[0269] Combined with the thirteenth possible implementation manner of the second aspect, in the sixteenth possible implementation manner,

[0270] If the terminal determines that the frequency-domain resource manner occupied by the SRS sent by the terminal on each symbol of the SRS subframe is that the frequency-domain resources occupied by the SRS sent on different time slots of the SRS subframe are different, then

[0271] The configuration information further includes at least one of the following information: cell common bandwidth information C SRS , which is used to indicate the bandwidth occupied by the terminal in the current cell when sending SRS;

[0272] The terminal-specific bandwidth information of the terminal in the time slot with serial number n s is used to indicate that under the bandwidth indicated by the cell common bandwidth information C , the bandwidth occupied by the terminal when sending SRS in the time slot with serial number n SRS ; s The frequency-domain starting position information of the terminal in the time slot with serial number n

[0273] is used to indicate the frequency-domain starting position of the bandwidth occupied by the terminal when sending SRS in the time slot with serial number n s in the SRS subframe. in the SRS subframe. s

[0274] Combined with the sixteenth possible implementation manner of the second aspect, in the seventeenth possible implementation manner,

[0275] The terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0276] The terminal determines the frequency-domain resources occupied by the SRS sent on each symbol of the time slot with serial number n s in the SRS subframe according to the following information, and at least one of the following information is obtained by the terminal from the configuration message sent by the base station:

[0277] The cell common bandwidth information C SRS ; ​

[0278] The terminal's dedicated bandwidth information at the time slot with sequence number n s

[0279] The terminal's frequency domain starting position information at the time slot with sequence number n s

[0280] Combined with the thirteenth possible implementation of the second aspect, in the eighteenth possible implementation,

[0281] If the terminal determines that the frequency domain resource manner occupied by the SRS sent by the terminal on each symbol of the SRS subframe is that the frequency domain resources occupied by the SRS sent on different time slots of the SRS subframe are different, then

[0282] The configuration information further includes at least one of the following information: the cell common bandwidth information C SRS , which is used to indicate the bandwidth occupied by the terminal in the current cell when sending the SRS;

[0283] The dedicated bandwidth information B of the terminal SRS The dedicated bandwidth information B of the terminal SRS is used to indicate that under the bandwidth indicated by the cell common bandwidth information C SRS the bandwidth occupied by the terminal when sending the SRS;

[0284] The terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0285] The terminal determines the terminal's dedicated bandwidth information at the time slot with sequence number n according to the following formula s

[0286] where is the maximum value in the value range of B SRS .

[0287] Combined with the thirteenth or eighteenth possible implementation of the second aspect, in the nineteenth possible implementation,

[0288] The configuration information further includes: the frequency domain starting position information n of the terminal RRC The frequency domain starting position information n of the terminal RRC , which is used to indicate the frequency domain starting position of the bandwidth occupied by the terminal when sending the SRS;

[0289] The terminal determines the configuration of the SRS subframe according to the received configuration information, including: the terminal determines according to the following formula at the time slot with sequence number n​​​s Frequency domain starting position information on the time slot

[0290] or

[0291] and

[0292] wherein is the maximum value in the value range of n RRC The value range, represents that the hopping granularity is times the total bandwidth, M takes positive integer values such as 2, 3, 4,..., and the values are predefined is the number of RBs included in the minimum bandwidth for SRS transmission, and the value is predefined

[0293] Combined with the seventeenth or nineteenth possible implementation manner of the second aspect, in the twentieth possible implementation manner

[0294] The terminal sends SRS on the SRS subframe according to the determined configuration of the SRS subframe, including:

[0295] For the time slot with serial number n in the SRS subframe used by the terminal to send SRS s the terminal starts from the frequency domain starting position indicated by and sends SRS within the bandwidth range indicated by

[0296] Combined with the thirteenth possible implementation manner of the second aspect, in the twenty-first possible implementation manner, if the terminal determines that the frequency domain resource occupation manner of the SRS sent by the terminal on each symbol of the SRS subframe is that the frequency domain resources occupied by the SRS sent on different time slots of the SRS subframe are different, then

[0297] The configuration information further includes at least one of the following information: the cell common bandwidth information C SRS which is used to indicate the bandwidth occupied by the terminal in the current cell to send SRS;

[0298] The same terminal dedicated bandwidth information B on each time slot used by the terminal to send SRS SRS which is used to indicate that under the bandwidth indicated by the cell common bandwidth information C SRS the same bandwidth occupied by the terminal to send SRS on each time slot used to send SRS

[0299] Combined with the twenty-first possible implementation manner of the second aspect, in the twenty-second possible implementation manner, the configuration information further includes: the terminal at serial number n​s Frequency domain starting position information on the time slot Used to indicate that the sequence number of the terminal in the SRS subframe is n s Frequency domain starting position of the bandwidth occupied by transmitting SRS on the time slot; or the frequency domain starting position information of the terminal on the time slot with sequence number n s Frequency domain starting position information on the time slot Is predefined

[0300] Combined with the thirteenth or twenty-second possible implementation manner of the second aspect, in the twenty-third possible implementation manner

[0301] The configuration information further includes: the frequency domain starting position information n of the terminal RRC The frequency domain starting position information n of the terminal RRC Used to indicate the frequency domain starting position of the bandwidth occupied by the terminal transmitting SRS

[0302] The terminal determines the configuration of the SRS subframe according to the received configuration information, including: the terminal determines the frequency domain starting position information on the time slot with sequence number n according to the following formula s Frequency domain starting position information on the time slot

[0303] Or

[0304] And

[0305] Wherein Is n RRC The maximum value in the value range Represents that the hopping granularity is Times of the total bandwidth, M takes positive integers, such as 2, 3, 4,..., and the value is predefined Is the number of RBs included in the minimum bandwidth for SRS transmission, and the value is predefined

[0306] Combined with the twenty-second or twenty-third possible implementation manner of the second aspect, in the twenty-fourth possible implementation manner

[0307] The terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0308] The terminal determines the frequency domain resources occupied by the SRS transmitted on each symbol of the time slot with sequence number n in the SRS subframe according to the following information, and at least one of the following information is obtained by the terminal from the configuration message sent by the base station: s Cell common bandwidth information C

[0309] Cell common bandwidth information C SRS ;

[0310] The same terminal dedicated bandwidth information B on each time slot used by the terminal to send SRS SRS ;

[0311] The frequency domain starting position information of the terminal on the time slot with sequence number n s

[0312] Combined with the twenty-fourth possible implementation manner of the second aspect, in the twenty-fifth possible implementation manner, the terminal sends SRS on the SRS subframe according to the determined configuration of the SRS subframe, including:

[0313] For the time slot with sequence number n in the SRS subframe used by the terminal to send SRS s The terminal starts from the indicated frequency domain starting position and sends SRS within the bandwidth indicated by B SRS

[0314] Combined with the thirteenth possible implementation manner of the second aspect, in the twenty-sixth possible implementation manner, if the terminal determines that the frequency domain resource manner occupied by the SRS sent by the terminal on each symbol of the SRS subframe is that the SRSs sent by the terminal on different symbols of the SRS subframe occupy different frequency domain resources, then

[0315] The configuration information further includes at least one of the following information:

[0316] Cell common bandwidth information C SRS , which is used to indicate the bandwidth occupied by the terminal in the current cell to send SRS;

[0317] The terminal dedicated bandwidth information on the symbol with sequence number l which is used to indicate the bandwidth occupied by the terminal to send SRS on the symbol with sequence number l under the bandwidth indicated by the cell common bandwidth information C SRS ;

[0318] The frequency domain starting position information of the terminal on the symbol with sequence number l which is used to indicate the frequency domain starting position of the bandwidth occupied by the terminal to send SRS on the symbol with sequence number l in the SRS subframe.

[0319] Combined with the twenty-sixth possible implementation manner of the second aspect, in the twenty-seventh possible implementation manner, the terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0320] ​​​The terminal determines the frequency-domain resources occupied by the SRS transmitted on the symbol with sequence number l in the SRS subframe according to the following information, and at least one of the following information is obtained by the terminal from the configuration message sent by the base station:

[0321] Cell common bandwidth information C SRS ;

[0322] The terminal-specific bandwidth information of the terminal on the symbol with sequence number l

[0323] The frequency-domain starting position information of the terminal on the symbol with sequence number l

[0324] Combined with the thirteenth possible implementation manner of the second aspect, in the twenty-eighth possible implementation manner, if the terminal determines that the frequency-domain resources occupied by the SRS transmitted on each symbol of the SRS subframe are as follows: the frequency-domain resources occupied by the SRS transmitted on different symbols of the SRS subframe are different, then

[0325] The configuration information further includes at least one of the following information:

[0326] The cell common bandwidth information C SRS , used to indicate the bandwidth occupied by the terminal transmitting SRS in the current cell; or the cell common bandwidth information C SRS is predefined;

[0327] The dedicated bandwidth information B of the terminal SRS , used to indicate that under the bandwidth indicated by the cell common bandwidth information C SRS , the bandwidth occupied by the terminal transmitting SRS;

[0328] The terminal determines the configuration of the SRS subframe according to the received configuration information, including: the terminal determines the terminal-specific bandwidth information on the symbol with sequence number l according to the following formula

[0329] where is the maximum value in the value range of B SRS ;

[0330] Combined with the thirteenth or twenty-eighth possible implementation manner of the second aspect, in the twenty-ninth possible implementation manner,

[0331] The configuration information further includes: the frequency-domain starting position information n of the terminal RRC , the frequency-domain starting position information n of the terminal RRC , used to indicate the frequency-domain starting position of the bandwidth occupied by the terminal transmitting SRS;

[0332] The terminal determines the configuration of the SRS subframe according to the received configuration information, including: the terminal determines the frequency-domain starting position information on the symbol with serial number l according to the following formula

[0333] or

[0334] , and

[0335] wherein, is the maximum value in the value range of n RRC The value range, represents that the hopping granularity is times of the total bandwidth, M takes positive integers, such as 2, 3, 4,..., and the value is predefined, is the number of RBs included in the minimum bandwidth for SRS transmission, and the value is predefined.

[0336] Combined with the twenty-seventh or twenty-ninth possible implementation manner of the second aspect, in the thirtieth possible implementation manner, the terminal sends SRS on the SRS subframe according to the determined configuration of the SRS subframe, including:

[0337] For the symbol with serial number l in the SRS subframe used by the terminal to send SRS, the terminal starts from the frequency-domain starting position indicated by and sends SRS within the bandwidth indicated by .

[0338] Combined with the thirteenth possible implementation manner of the second aspect, in the thirty-first possible implementation manner, if the terminal determines that the frequency-domain resource manner occupied by the SRS sent by the terminal on each symbol of the SRS subframe is: the frequency-domain resources occupied by the SRS sent on different symbols of the SRS subframe are different, then

[0339] The configuration information further includes at least one of the following information:

[0340] The cell common bandwidth information C SRS , which is used to indicate the bandwidth occupied by the terminal in the current cell to send SRS;

[0341] The same terminal-specific bandwidth information B on each symbol used by the terminal to send SRS SRS , which is used to indicate that under the bandwidth indicated by the cell common bandwidth information C SRS , the terminal sends SRS on each symbol used to send SRS and occupies the same bandwidth.

[0342] Combined with the thirty - first possible implementation manner of the second aspect, in the thirty - second possible implementation manner,

[0343] The configuration information further includes: the frequency - domain starting position information of the terminal on the symbol with serial number l for indicating the frequency - domain starting position of the bandwidth occupied by the terminal to send SRS on the symbol with serial number l in the SRS sub - frame; or the frequency - domain starting position information of the terminal on the symbol with serial number l is predefined.

[0344] Combined with the thirty - first possible implementation manner of the second aspect, in the thirty - third possible implementation manner,

[0345] The configuration information further includes: the frequency - domain starting position information n of the terminal RRC the frequency - domain starting position information n of the terminal RRC for indicating the frequency - domain starting position of the bandwidth occupied by the terminal to send SRS;

[0346] The terminal determines the configuration of the SRS sub - frame according to the received configuration information, including: the terminal determines the frequency - domain starting position information on the symbol with serial number l according to the following formula

[0347] or

[0348] and

[0349] where, is the maximum value in the value range of n RRC the value range, represents that the hopping granularity is times of the total bandwidth, M takes positive integers, such as 2, 3, 4,..., the value is predefined, is the number of RBs included in the minimum bandwidth of SRS transmission, and the value is predefined.

[0350] Combined with the thirty - second or thirty - third possible implementation manner of the second aspect, in the thirty - fourth possible implementation manner,

[0351] The terminal determines the configuration of the SRS sub - frame according to the received configuration information, including:

[0352] The terminal determines the frequency - domain resources occupied by the SRS sent on the symbol with serial number l in the SRS sub - frame according to the following information, and at least one of the following information is obtained by the terminal from the configuration message sent by the base station:

[0353] Cell common bandwidth information CSRS ;

[0354] The same terminal-specific bandwidth information B on each symbol used by the terminal to transmit SRS SRS ;

[0355] The frequency-domain starting position information of the terminal on the symbol with serial number l

[0356] Combined with the thirty-fourth possible implementation manner of the second aspect, in the thirty-fifth possible implementation manner,

[0357] The terminal transmits SRS on the SRS subframe according to the determined configuration of the SRS subframe, including:

[0358] For the symbol with serial number l in the SRS subframe used by the terminal to transmit SRS, the terminal starts from the indicated frequency-domain starting position and transmits SRS within the bandwidth indicated by B SRS indicated bandwidth range.

[0359] Combined with any one of the thirteenth to thirty-fifth possible implementation manners of the second aspect, in the thirty-sixth possible implementation manner,

[0360] The terminal transmits SRS using a single antenna; the configuration information further includes: information for indicating the value of n comb ; the terminal determines the configuration of the SRS subframe according to the received configuration information, including: for each PRB in each symbol occupied by the SRS transmitted by the terminal, the terminal determines non-consecutive subcarriers in the PRB occupying the symbol, and the occupied subcarriers are spaced apart by n comb -1 subcarriers;

[0361] The terminal transmits SRS using multiple antennas; the configuration information further includes: information for indicating the value of n comb ; the terminal determines the configuration of the SRS subframe according to the received configuration information, including: for each PRB in a symbol occupied by the SRS transmitted by the terminal, the terminal determines non-consecutive subcarriers in the PRB occupying the symbol, and for one antenna used by the terminal, the subcarriers transmitted by the SRS through this antenna are spaced apart by n comb subcarriers.

[0362] Combined with the thirty-sixth possible implementation manner of the second aspect, in the thirty-seventh possible implementation manner,

[0363] The manner in which the SRS transmitted by the terminal on each symbol of the SRS subframe occupies the comb subcarriers is one of the following manners:

[0364] For different symbols occupied by the SRS sent by the terminal, the terminal occupies the same comb subcarriers in the symbols; or

[0365] For symbols occupied by the SRS sent by the terminal and located in different time slots, the terminal occupies different comb subcarriers in the symbols; or

[0366] For different symbols occupied by the SRS sent by the terminal, the terminal occupies different comb subcarriers in the symbols;

[0367] The configuration information further includes: indication information for indicating the manner in which the terminal occupies comb subcarriers for the SRS sent on each symbol of the SRS subframe; or

[0368] The manner in which the terminal occupies comb subcarriers for the SRS sent on each symbol of the SRS subframe is predefined.

[0369] Combined with the thirty-seventh possible implementation manner of the second aspect, in the thirty-eighth possible implementation manner,

[0370] If the terminal determines that the manner in which the terminal occupies comb subcarriers for the SRS sent on each symbol of the SRS subframe is: for different symbols occupied by the SRS sent by the terminal, the terminal occupies the same comb subcarriers in the symbols, then

[0371] The configuration information further includes: information for indicating the position of the starting subcarrier in the PRB among the subcarriers occupied by the SRS sent by the terminal; or

[0372] The position of the starting subcarrier in the PRB among the subcarriers occupied by the SRS sent by the terminal is pre-agreed by the protocol.

[0373] Combined with the thirty-seventh possible implementation manner of the second aspect, in the thirty-ninth possible implementation manner,

[0374] If the terminal determines that the manner in which the terminal occupies comb subcarriers for the SRS sent on each symbol of the SRS subframe is: for symbols occupied by the SRS sent by the terminal and located in different time slots, the terminal occupies different comb subcarriers;

[0375] The configuration information further includes:

[0376] For each time slot of the SRS subframe available for the terminal, information indicating the position of the starting subcarrier in the PRB among the subcarriers occupied by the SRS that the terminal can transmit in this time slot.

[0377] Combined with the thirty-seventh possible implementation of the second aspect, in the fortieth possible implementation,

[0378] If the terminal determines that the way the SRS occupies the comb subcarriers on each symbol of the SRS subframe is: for symbols in different time slots occupied by the SRS transmitted by the terminal, the terminal occupies different comb subcarriers in the symbols;

[0379] The configuration information further includes: parameter

[0380] The terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0381] For the time slot with serial number n of the SRS subframe available for the terminal s The terminal determines the parameter according to the formula Determine parameter

[0382] The terminal transmits the SRS on the SRS subframe according to the determined configuration of the SRS subframe, including:

[0383] For a PRB in the time slot with serial number n of the SRS subframe used by the terminal to transmit the SRS s The terminal starts transmitting the SRS from the starting subcarrier indicated in this PRB.

[0384] Combined with the thirty-seventh possible implementation of the second aspect, in the forty-first possible implementation,

[0385] If the terminal determines that the way the SRS occupies the comb subcarriers on each symbol of the SRS subframe is: for different symbols occupied by the SRS transmitted by the terminal, the terminal occupies different comb subcarriers in the symbols;

[0386] For each symbol of the SRS subframe available for the terminal, the configuration information further includes:

[0387] Information indicating the position of the starting subcarrier in the PRB among the subcarriers occupied by the SRS that the terminal can transmit in this symbol.

[0388] ​Combined with the thirty-seventh possible implementation of the second aspect, in the forty-second possible implementation,

[0389] If the way for the terminal to determine the comb subcarriers occupied by the SRS sent on each symbol of the SRS subframe is: for different symbols occupied by the SRS sent by the terminal, the terminal occupies different comb subcarriers in the symbol;

[0390] The configuration information further includes: parameter

[0391] Based on the received configuration information, the terminal determines the configuration of the SRS subframe, including:

[0392] For the symbol with sequence number l of the SRS subframe available for the terminal, the terminal determines the parameter according to the formula Determine parameter

[0393] Based on the determined configuration of the SRS subframe, the terminal sends the SRS on the SRS subframe, including:

[0394] For a PRB in the symbol with sequence number l of the SRS subframe used by the terminal to send the SRS, the terminal starts to send the SRS from the starting subcarrier indicated in the PRB.

[0395] Combined with the second aspect, or any one of the first to forty-second possible implementations of the second aspect, in the forty-third possible implementation,

[0396] The SRS basic sequences used by the SRS sent by the terminal on different symbols of an SRS subframe are the same; or

[0397] The SRS basic sequences used by the SRS sent by the terminal on different time slots of an SRS subframe are different; or

[0398] The SRS basic sequences used by the SRS sent by the terminal on different symbols of an SRS subframe are different.

[0399] Combined with the forty-third possible implementation of the second aspect, in the forty-fourth possible implementation,

[0400] If the SRS basic sequences used by the SRS sent by the terminal on different time slots of an SRS subframe are different, then based on the received configuration information, the terminal determines the configuration of the SRS subframe, including:

[0401] The terminal determines according to the following formula at sequence number n of the SRS subframe s ​Group hopping format f of the SRS basic sequence used to transmit SRS on a time slot gh (n s ) is as follows:

[0402]

[0403] c is a pseudo-random sequence, initialized to denotes rounding down, is the cell identifier of the current cell.

[0404] Combined with the forty-third possible implementation manner of the second aspect, in the forty-fifth possible implementation manner,

[0405] If the SRS basic sequences used by the terminal to transmit SRS on different symbols of an SRS subframe are different, the terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0406] The terminal determines the group hopping format f of the SRS basic sequence used to transmit SRS on the symbol with serial number l according to the following formula gh (l) is as follows:

[0407]

[0408] c is a pseudo-random sequence, initialized to denotes rounding down, is the cell identifier of the current cell.

[0409] Combined with the second aspect, or any one of the first to forty-fifth possible implementation manners of the second aspect, in the forty-sixth possible implementation manner,

[0410] The terminal uses multiple antennas to transmit SRS;

[0411] The configuration information further includes: information for indicating the value of the parameter ; or the value of the parameter of the terminal is predefined, and the is a parameter for determining the cyclic shift of the SRS sequence of the SRS transmitted on each antenna of the terminal;

[0412] The terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0413] The terminal determines the cyclic shift of the SRS sequence of the SRS transmitted on the antenna with serial number according to the following formula

[0414]

[0415] Among them, N ap is the number of antennas used by the terminal to send SRS,

[0416] Combined with the second aspect, or any one of the first to forty-sixth possible implementation manners of the second aspect, in the forty-seventh possible implementation manner,

[0417] The SRSs sent by the terminal using multiple antennas in the current cell occupy different symbols on different antennas.

[0418] Combined with the second aspect, or any one of the first to forty-seventh possible implementation manners of the second aspect, in the forty-eighth possible implementation manner,

[0419] The SRSs sent by the terminal using multiple antennas in the current cell occupy different comb subcarriers in the symbols.

[0420] The configuration information further includes: information for indicating the value of the parameter and information for indicating the value of the parameter n comb ;

[0421] The terminal determines the configuration of the SRS subframe according to the received configuration information, including:

[0422] The terminal determines the parameter according to the following formula

[0423] Among them, is the antenna serial number corresponding to the antenna port number p;

[0424] The terminal determines the position of the comb subcarrier occupied by the SRS sent on the antenna with the antenna port number p according to the determined parameter .

[0425] Combined with the second aspect, or any one of the first to forty-eighth possible implementation manners of the second aspect, in the forty-ninth possible implementation manner,

[0426] The SRS subframe can also be used to transmit the physical uplink control channel PUCCH.

[0427] In a third aspect, an embodiment of the present invention provides a base station, including a sending module, configured to perform the sending operation of the base station in the method provided in any one of the first aspect or the possible implementation manners of the first aspect.

[0428] Further, the base station further includes a processing module, configured to perform the processing actions of the base station in the method provided in any one of the first aspect or the possible implementation manners of the first aspect.

[0429] Further, the base station may further include a receiving module, configured to perform the receiving actions of the base station in the method provided in any one of the first aspect or the possible implementation manners of the first aspect.

[0430] For specific descriptions, reference may be made to the method provided in any one of the first aspect or the possible implementation manners of the first aspect, which will not be elaborated herein.

[0431] Fourth aspect, an embodiment of the present invention provides a terminal, including:

[0432] a transceiver module, configured to perform the sending and / or receiving actions of the terminal in the method provided in any one of the second aspect or the possible implementation manners of the second aspect.

[0433] Further, the terminal further includes a processing module, configured to perform the processing actions of the terminal in the method provided in any one of the second aspect or the possible implementation manners of the second aspect.

[0434] For specific descriptions, reference may be made to the method provided in any one of the second aspect or the possible implementation manners of the second aspect, which will not be elaborated herein.

[0435] Fifth aspect, an embodiment of the present invention provides a base station, including a processor, a memory, and a transmitter,

[0436] the memory is configured to store instructions;

[0437] the processor is configured to execute the instructions stored in the memory to control the transmitter to send signals, and when the processor executes the instructions stored in the memory, the base station is configured to complete the method provided in the first aspect or any one of the possible implementation manners of the first aspect.

[0438] Sixth aspect, an embodiment of the present invention provides a terminal, including a processor, a memory, and a transceiver,

[0439] the memory is configured to store instructions;

[0440] the processor is configured to execute the instructions stored in the memory to control the transceiver to send and receive signals, and when the processor executes the instructions stored in the memory, the terminal is configured to complete the method provided in the second aspect or any one of the possible implementation manners of the second aspect.

[0441] In summary, compared with the situation in the current LTE system where SRS is transmitted only in the last symbol of the uplink subframe or in the UpPTS of the special subframe, there are more transmission resources available for transmitting SRS in the embodiments of the present invention.

[0442] On the one hand, as the base station antenna array increases or the number of terminal antennas or the number of terminals increases, the current LTE system provides relatively few resources available for carrying SRS. By adopting the solution provided in the embodiments of the present invention, the demand of the current LTE system for resources used to carry SRS can be met.

[0443] On the other hand, the solution provided in the embodiments of the present invention can also meet the transmission requirements of short-delay systems, millimeter-wave systems, etc., so as to achieve accurate uplink channel quality measurement and channel estimation.

[0444] Moreover, since the SRS subframe is configured separately and all uplink symbols in the SRS subframe can be used to carry SRS, the resources used to carry SRS can be flexibly configured according to the number of terminals in the current system and the requirements of channel measurement and estimation, realizing greater flexibility.

[0445] In addition, when SRS is multiplexed with channels such as PUSCH and Physical Uplink Control Channel (PUCCH), as Figure 4 shown in the multiplexing of SRS and PUSCH channels. To avoid conflicts between SRS and these channels, complex collision mechanisms are usually introduced. For example, SRS is dropped or some channels are dropped / punched, which reduces the transmission performance of the channels; if a shortened format of PUCCH, etc. is used, a complex judgment mechanism needs to be introduced.

[0446] Optionally, by adopting the solution provided in the embodiments of the present invention, since there are sufficient resources available for carrying SRS, SRS does not need to be multiplexed with channels such as PUSCH and PUCCH. Therefore, complex collision mechanisms are avoided, and some channels do not need to be punched or dropped, or SRS does not need to be dropped, thus ensuring the transmission performance of the channels.

[0447] In summary, in the embodiments of the present invention, a dedicated SRS subframe is provided, and SRS is transmitted within the dedicated SRS subframe, which not only improves the coverage of SRS, but also avoids conflicts with other channels, reducing the implementation complexity. In addition, due to the provision of more transmission resources, the ability to support multiple antennas can also be improved. Description of the Drawings

[0448] Figure 1A It is a schematic diagram of SRS transmitted only in the last symbol of the uplink subframe;

[0449] Figure 1BIt is a schematic diagram of the wireless frame structure;

[0450] Figure 2 It is a schematic diagram of the SRS adopting a comb-like structure;

[0451] Figure 3 It is a schematic diagram of SRS frequency hopping and non-frequency hopping;

[0452] Figure 4 It is a schematic diagram of the multiplexing of SRS and the Physical Uplink Shared Channel (PUSCH);

[0453] Figure 5 It is a schematic diagram of the structure of the wireless communication system provided by the embodiments of the present invention;

[0454] Figure 6 It is a schematic diagram that when the symbol configuration is subframe-level configuration, the terminal uses each uplink symbol with an interval of two symbols within the SRS subframe for SRS transmission;

[0455] Figure 7 It is a schematic diagram that when the symbol configuration is slot-level configuration, two slots adopt the same symbol transmission method, and the terminal uses each uplink symbol with an interval of two symbols within the SRS subframe for SRS transmission;

[0456] Figure 8 It is a schematic diagram that when the symbol configuration is slot-level configuration and only the first slot in the SRS subframe is used, the terminal performs SRS transmission;

[0457] Figure 9 It is a schematic diagram that when the symbol configuration is slot-level configuration and only the second slot in the SRS subframe is used, the terminal performs SRS transmission;

[0458] Figure 10 It is a schematic diagram of the terminal sending SRS when different terminal frequencies are multiplexed or different antenna frequencies of one terminal are multiplexed;

[0459] Figure 11 It is a schematic diagram of the terminal sending SRS when code division, time division, and frequency division are used simultaneously;

[0460] Figure 12 It shows the slot-level hopping mode in which the physical resource blocks (PRBs) occupied by the SRS sent by the terminal are the same in different slots and the comb subcarriers are different;

[0461] Figure 13 It shows the slot-level hopping mode in which the PRBs occupied by the SRS sent by the terminal are different in different slots and the comb subcarriers are the same;

[0462] Figure 14 It shows the PRB occupied by the SRS sent by the terminal is different on different time slots, and the time slot-level hopping method of different comb subcarriers;

[0463] Figure 15 It shows the PRB occupied by the SRS sent by the terminal is the same on different symbols, and the symbol-level hopping method of the same comb subcarrier position;

[0464] Figure 16 It shows the PRB occupied by the SRS sent by the terminal is the same on different symbols, and the symbol-level hopping method of different comb subcarrier positions;

[0465] Figure 17 It shows the PRB occupied by the SRS sent by the terminal is different on different symbols, and the symbol-level hopping method of the same comb subcarrier position;

[0466] Figure 18 It shows the PRB occupied by the SRS sent by the terminal is different on different symbols, and the symbol-level hopping method of different comb subcarrier positions;

[0467] Figure 19 It is a flowchart of the SRS configuration method provided by the embodiment of the present invention;

[0468] Figure 20 It is a flowchart of the SRS transmission method provided by the embodiment of the present invention;

[0469] Figure 21 It is a schematic structural diagram of the first base station provided by the embodiment of the present invention;

[0470] Figure 22 It is a schematic structural diagram of the second base station provided by the embodiment of the present invention;

[0471] Figure 23 It is a schematic structural diagram of the first terminal provided by the embodiment of the present invention;

[0472] Figure 24 It is a schematic structural diagram of the second terminal provided by the embodiment of the present invention. Detailed implementation manners

[0473] The embodiment of the present invention provides a terminal, a base station, and a configuration and transmission method of SRS, so as to provide more SRS transmission resources, which can meet the requirements of uplink channel quality measurement and channel estimation in systems such as short-delay systems and millimeter-wave systems.

[0474] In an embodiment of the present invention, a base station sends configuration information of an SRS subframe to a terminal. The terminal determines the configuration of the SRS subframe according to the received configuration information, and sends an SRS on the SRS subframe according to the determined configuration of the SRS subframe. Wherein, the SRS subframe is an uplink subframe, or a subframe in which the number of uplink symbols is not less than the number of downlink symbols; and all uplink symbols in the SRS subframe can be used to carry the SRS.

[0475] Currently, as Figure 1A shown, the SRS is only transmitted in the last symbol of the uplink subframe or in the uplink pilot time slot (UpPTS) of the special subframe. The physical resources available for transmitting the SRS in a radio frame are few, and cannot meet the transmission requirements of the short-delay system and the millimeter-wave system described below. The specific analysis is as follows:

[0476] On the one hand, in order to reduce the data transmission delay and improve the data transmission efficiency, a frame structure shorter than the radio frame in the existing LTE system may be adopted in the future. For example, the subframe length is 0.5 ms, and the scheduling time unit is shortened. Compared with the scheduling time unit of 1 ms, 2 terminals can be scheduled in 1 ms of scheduling, and 4 terminals can be scheduled in 1 ms with a frame structure of 0.5 ms subframe length. Therefore, the number of terminals scheduled per unit time will increase. Currently, the available physical resources for the SRS are few, which may cause a terminal to be unable to send the SRS in the current subframe but only in a subsequent subframe, such as the next subframe, resulting in inaccurate results of the base station's measurement or channel estimation of the terminal's uplink channel quality. Moreover, in a TDD system, if the base station schedules downlink transmission according to the result of SRS measurement, the terminal's failure to send the SRS in time will delay the base station's next downlink scheduling for the terminal, thereby increasing the data transmission delay of the terminal and reducing its transmission efficiency.

[0477] On the other hand, whether for the existing LTE system or future wireless communication systems, the higher the system operating frequency band, the greater the propagation loss of the wireless signal. When the system operates in the millimeter-wave frequency band, usually the frequency range of this band is 3 GHz to 300 GHz, and the transmission loss of the wireless signal will be greater. In the existing LTE system, the available physical resources for the SRS are few, and the physical resources available for a terminal to send the SRS are limited. In wireless communication systems with large transmission losses such as millimeter waves, the limited SRS passes through a large transmission loss, and the energy of the SRS received by the base station is small, making it impossible for the base station to perform accurate channel quality measurement and channel estimation.

[0478] Compared with the situation in the current LTE system where the SRS is only in the last symbol of the uplink subframe or in the UpPTS of the special subframe, there are more transmission resources available for transmitting the SRS in the embodiment of the present invention.

[0479] On the one hand, as the base station antenna array increases or the number of terminal antennas or the number of terminals increases, the SRS resources available for bearing in the current LTE system are relatively few. By adopting the solution provided in the embodiments of the present invention, the requirements of the current LTE system for bearing SRS resources can be met.

[0480] On the other hand, the solution provided in the embodiments of the present invention can also meet the transmission requirements of short-delay systems, millimeter-wave systems, etc., so as to achieve accurate uplink channel quality measurement and channel estimation.

[0481] Moreover, since the SRS subframe is configured separately and all the uplink symbols in the SRS subframe can be used to bear SRS, the resources for bearing SRS can be flexibly configured according to the number of terminals in the current system and the requirements of channel measurement and estimation, realizing greater flexibility.

[0482] In addition, when SRS is multiplexed with channels such as PUSCH and Physical Uplink Control Channel (PUCCH), as Figure 4 shown in the multiplexing of SRS and PUSCH channels. In order to avoid conflicts between SRS and these channels, complex collision mechanisms are usually introduced, such as discarding SRS or discarding / puncturing certain channels, which reduces the transmission performance of the channels; if a shortened format of PUCCH is used, etc., a complex judgment mechanism also needs to be introduced.

[0483] Optionally, by adopting the solution provided in the embodiments of the present invention, since sufficient resources for bearing SRS are provided, SRS does not need to be multiplexed with channels such as PUSCH and PUCCH. Therefore, complex collision mechanisms are avoided, and certain channels do not need to be punctured or discarded, or SRS does not need to be discarded, thus ensuring the transmission performance of the channels.

[0484] In summary, a dedicated SRS subframe is provided in the embodiments of the present invention, and SRS is transmitted within the dedicated SRS subframe, which not only improves the coverage of SRS, but also avoids conflicts with other channels, reducing the implementation complexity. In addition, since more transmission resources are provided, the ability to support multiple antennas can also be improved.

[0485] Next, for the convenience of understanding, some descriptions of concepts related to the present invention are given by way of example for reference.

[0486] First, the related concepts of wireless communication networks are introduced:

[0487] I. The 3rd generation partnership project (3GPP) is a project dedicated to the development of wireless communication networks. Generally, the organizations related to 3GPP are referred to as 3GPP organizations.

[0488] II. Wireless communication networks

[0489] A wireless communication network is a network that provides wireless communication capabilities. The wireless communication network can adopt different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single Carrier FDMA (SC-FDMA), Carrier Sense Multiple Access with Collision Avoidance. According to factors such as the capacity, rate, and latency of different networks, the network can be divided into 2G (generation) network, 3G network, or 4G network. Typical 2G networks include the global system for mobile communications / general packet radio service (GSM) network or the general packet radio service (GPRS) network. Typical 3G networks include the universal mobile telecommunications system (UMTS) network. Typical 4G networks include the long term evolution (LTE) network. Among them, the UMTS network can sometimes also be called the universal terrestrial radio access network (UTRAN), and the LTE network can sometimes also be called the evolved universal terrestrial radio access network (E-UTRAN).According to different resource allocation methods, it can be divided into cellular communication networks and wireless local area networks (abbreviated as WLAN in English). Among them, cellular communication networks are dominated by scheduling, and WLAN is dominated by competition. The aforementioned 2G, 3G, and 4G networks are all cellular communication networks. Those skilled in the art should know that with the development of technology, the technical solutions provided in the embodiments of the present invention can also be applied to other wireless communication networks, such as 4.5G or 5G networks, or other non-cellular communication networks. For the sake of brevity, the embodiments of the present invention sometimes abbreviate wireless communication networks as networks.

[0490] A cellular communication network is a type of wireless communication network that uses a cellular wireless networking method to connect terminal devices and network devices through wireless channels, thereby enabling users to communicate with each other during activities. Its main feature is the mobility of the terminal, and it has functions such as handover across cells and automatic roaming across local networks.

[0491] III. Terminal

[0492] A terminal, also known as user equipment (abbreviated as UE in English), is a type of terminal device that can be a mobile terminal device or a non-mobile terminal device. This device is mainly used to receive or send service data. User equipment can be distributed in the network, and user equipment has different names in different networks, such as: terminal, mobile station, user unit, station, cellular phone, personal digital assistant, wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop station, etc. This user equipment can communicate with one or more core networks through a radio access network (abbreviated as RAN, the access part of a wireless communication network), such as exchanging voice and / or data with the radio access network.

[0493] IV. Base Station

[0494] A base station (English: base station, abbreviation: BS) device, also known as a base station, is a device deployed in a radio access network to provide wireless communication functions. For example, in a 2G network, the devices providing base station functions include a base transceiver station (English: base transceiver station, abbreviation: BTS) and a base station controller (English: base station controller, abbreviation: BSC). In a 3G network, the devices providing base station functions include a Node B (English abbreviation: NodeB) and a radio network controller (English: radio network controller, abbreviation: RNC). In a 4G network, the device providing base station functions is an evolved Node B (English: evolved NodeB, abbreviation: eNB). In a WLAN, the device providing base station functions is an access point (English: Access Point, abbreviation: AP). It can also be a node in future networks such as 4.5G or 5G networks.

[0495] V. Cell

[0496] Cell: In mobile communication, the area covered by a wireless signal is called a cell, generally referring to the range that the signal of a base station can cover. Each cell has a cell ID. A cell can also contain multiple virtual cells. The virtual cells can be divided according to different horizontal or vertical spaces of the cell, or in other ways. Each virtual cell has an independent cell ID or the same cell ID.

[0497] VI. Resources

[0498] Resources can include at least one or more of time resources, frequency resources, code resources, and space resources

[0499] Time resources: Resources occupied by a signal measured in terms of time. For example, a signal occupies 2 OFDM symbols in time, or 1 subframe, or 3 radio frames. Time resources can include absolute time resources and relative time resources, such as at least one or more of a radio frame number, the relative position of a subframe in a radio frame, and the relative position of a symbol in a subframe. Usually, when describing time resources as fixed or variable, it is in terms of relative time resources. Usually, when describing time resources as the same, it can be that the absolute time resources are the same, or the relative time resources are the same.

[0500] Frequency resources: Resources occupied by a signal measured in terms of frequency. For example, a signal occupies 10 MHz in frequency. In an OFDM system, the number of subcarriers is usually used to describe the occupied frequency resources.

[0501] Time-frequency resource: The resources occupied by a signal, measured in terms of time and frequency. For example, a signal occupies 2 OFDM symbols in time and 10 MHz in frequency.

[0502] Code resource: The resources occupied by a signal, measured in terms of codes. For example, the spreading codes in WCDMA, or the sequence resources used by a signal are also called code resources. For example, the sequence used by a synchronization signal.

[0503] Sequence: A type of code resource.

[0504] Unit time-frequency resource: The smallest unit of time resource and frequency resource. In an OFDM system, it refers to the resource unit (English: resource element) composed of a subcarrier and an OFDM symbol.

[0505] VII. Frame Structure, Radio Frame, Subframe, Symbol, Time Slot

[0506] The frame structure is the structure shown by dividing the time resource (time domain) for signal transmission. In wireless communication, the time units in the commonly used frame structure are, from largest to smallest, radio frames, subframes, and time slots. As Figure 1B shown, a radio frame is defined as a frame structure with a time length of T f , and a radio frame contains n subf subframes, each subframe having a length of T f / n subf , or each subframe having a different length. A subframe contains n slot time slots, and the label of each time slot is n s ∈ {0, 1,..., n slot - 1} or n s ∈ {0, 1,..., n subf ×n slot - 1}. A time slot can contain symbols. A subframe will contain symbols. The specific time length corresponding to each time unit can be determined according to specific protocol requirements, and the number relationship between each time unit is determined by the time length corresponding to each time unit.

[0507] For example, in the existing LTE, a radio frame has a length of 10 ms, a radio frame contains 10 subframes, and each subframe has a length of 1 ms.,.. A subframe contains two time slots, and the label of each time slot is 0 to 19.

[0508] Taking a frame structure in LTE as an example: A radio frame has a length of 10 ms and contains 10 subframes. Each subframe has a length of 1 ms, and the labels of each subframe are from 0 to 9. Each subframe further contains two time slots, and each time slot is 0.5 ms. A time slot contains 6 or 7 symbols. A subframe contains 12 or 14 symbols.

[0509] A symbol is the smallest unit of a signal. Taking the LTE network as an example, each OFDM subcarrier corresponds to an OFDM symbol.

[0510] Frame number: The number of each radio frame. Taking the LTE network as an example, the frame numbers in LTE range from 0 to 1023 and then start numbering from 0 again.

[0511] VIII. Frequency Selective Scheduling

[0512] Frequency selective scheduling: It refers to frequency domain scheduling based on the frequency response of the channel. For example, subcarriers (groups) with higher channel quality are selected for transmission.

[0513] IX. Resource Block (RB):

[0514] It is used to describe the mapping from a specific physical channel to resource units. A physical resource block (PRB) is defined as occupying consecutive OFDM symbols in the time domain and occupying consecutive subcarriers in the frequency domain.

[0515] In the existing LTE system, a PRB is defined as one slot in the time domain and 12 subcarriers in the frequency domain.

[0516] In the embodiments of the present invention, a PRB can be defined as occupying N l consecutive symbols in the time domain and occupying consecutive N k subcarriers in the frequency domain. Wherein, N l can take values: N l ∈ {1,..., n slot}, and N k takes positive integer values.

[0517] Next, the principles related to SRS are introduced:

[0518] Sounding Reference Signal (SRS): A signal used for uplink channel sounding. The base station can perform uplink channel estimation based on the SRS sent by the UE and then perform frequency-selective scheduling of uplink data. And based on the reciprocity of the uplink and downlink channels, frequency-selective scheduling of downlink data can be performed. In addition, the characteristics of the terminal, including the distance of the terminal and the spatial orientation of the terminal, can also be determined according to the SRS.

[0519] I. Comb

[0520] The SRS can adopt a comb-like structure. For a terminal, the SRS is transmitted on subcarriers that are at least one subcarrier apart from each other on one symbol. Since its shape looks like a comb, it is called a comb-like structure. For example, as Figure 2 shown, in the current LTE system, the SRS is transmitted on subcarriers that are one subcarrier apart from each other in one symbol.

[0521] II. Frequency Domain Resources Occupied by SRS

[0522] Currently, there is no frequency hopping for non-periodic SRS; while for periodic SRS, frequency hopping can be adopted. In this case, the hopping is between subframes, and the frequency domain resources occupied by the SRS on different subframes are different, as Figure 3 shown.

[0523] Currently, in the LTE system, the cell-level SRS bandwidth C SRS ∈{0, 1, 2, 3, 4, 5, 6, 7}, and the UE-level SRS bandwidth configuration B SRS will be configured through higher-layer signaling, such as Radio Resource Control (RRC) signaling. One type of cell-level SRS bandwidth will include 4 types of UE-level SRS bandwidth B SRS ∈{0, 1, 2, 3}, and the subcarrier comb parameter for SRS transmission (because currently the SRS is transmitted only one subcarrier apart) and the frequency domain position parameter n RRC will be configured. Through these parameters, the terminal can determine the specific frequency domain resources for SRS transmission.

[0524] For different uplink bandwidths, the SRS bandwidth is configured as follows. For specific details, refer to the following description in Technical Specification (TS) 36.211 of the 3rd Generation Partnership Project (3GPP). Here, an example is given where the uplink bandwidth is not less than 6 RBs and not greater than 40 RBs. rd Generation Partnership Project, 3GPP) Technical Specification (Technical Specification, TS) 36.211, where the uplink bandwidth is not less than 6 RBs and not greater than 40 RBs is taken as an example.

[0525] Table 5.5.3.2-1: m SRS,b and N b , b = 0, 1, 2, 3, uplink bandwidth value:

[0526]

[0527] The starting position in the frequency domain is calculated as follows:

[0528]

[0529] where is the length of the SRS sequence, defined as follows where m SRS,b is determined by the SRS bandwidth configuration for each uplink bandwidth below. is the number of subcarriers in one RB, currently 12., n b represents the frequency band label occupied by SRS in the bandwidth of each layer, n b in, the value range of b is 0 to B SRS , where 0 represents the 0th layer, 1 represents the first layer, 2 represents the second layer, 3 represents the third layer; represents the division level of the entire bandwidth, and p is the antenna port number.

[0530] where for the uplink subframe below is defined as follows:

[0531]

[0532] For UpPTS below is defined as follows

[0533]

[0534] For UpPTS, if reconfiguration is available indicated by the high-layer configuration parameter srsMaxUpPts, then m SRS,0 will be reconfigured to otherwise reconfiguration is not available, where c is an SRS bandwidth configuration, C SRS is the SRS bandwidth configuration set C for each uplink bandwidth below SRS ∈ {0, 1, 2, 3, 4, 5, 6, 7}, N RA The number of PRACHs (physical random access channel) in format 4 on UpPTS, each PRACH occupies 6 PRBs.

[0535] where The calculation is as follows:

[0536]

[0537] where The correspondence with antenna p is as follows:

[0538]

[0539] is determined by the parameter transmissionComb or transmissionComb-ap provided by the higher layer, corresponding to periodic SRS transmission and aperiodic SRS transmission respectively, and n b is a frequency-domain position parameter, and the calculation is as follows. For the UpPTS in the first half of the radio frame (taking a radio frame including 10 subframes as an example, the first half refers to subframes 0 to 4 in the radio frame), n hf is equal to 0; for the UpPTS in the second half of the radio frame (taking a radio frame including 10 subframes as an example, the first half refers to subframes 5 to 9 in the radio frame), n hf is equal to 1.

[0540] The SRS frequency-domain hopping indication parameter is b hop ∈ {0, 1, 2, 3}, and is determined by the higher layer parameter srs-HoppingBandwidth. When b hop ≥ B SRS the SRS frequency-domain hopping is not available, then n b is constant (unless reconfigured) as where, for periodic SRS transmission, the parameter n RRC is determined by the higher layer parameter freqDomainPosition, and for aperiodic SRS transmission, the parameter n RRC is determined by the higher layer parameter freqDomainPosition-ap, corresponding to periodic SRS transmission and aperiodic SRS transmission respectively. When b hop <B SRS the SRS frequency-domain hopping is available, and n b is defined as follows:

[0541]

[0542] where N b is determined by the SRS bandwidth configuration under each uplink bandwidth

[0543]

[0544] where and ​

[0545]

[0546] Where N SP is the number of uplink / downlink switching points in a radio frame, and n f is the radio frame identifier, and n s is the time slot identifier in a radio frame, and T SRS is the SRS transmission period, and T offset is the SRS transmission offset, and T offset_max is the maximum value of the SRS subframe offset in a fixed configuration. When multiplexed with other channels, a relatively complex collision mechanism is required, which may discard the SRS or puncture the Physical Uplink Shared Channel (PUSCH) or use a shortened mode of the PUCCH, etc., reducing the transmission performance of other channels. Figure 4 shows the resource occupancy when the SRS is multiplexed with the PUSCH. When the SRS is not multiplexed with the PUSCH, generally the PUSCH and PUCCH occupy all the symbols in a frequency band; while when the SRS and PUSCH are multiplexed in the manner of Figure 4 , the last symbol of the PUSCH will not be transmitted, and rate matching is performed, while the PUCCH will be transmitted in a shortened mode, that is, the last symbol of the PUCCH will not be transmitted. In this way, the performance of the PUSCH and PUCCH will be affected, and the terminal needs a certain collision mechanism to determine whether the SRS is transmitted.

[0547] III. Multi-antenna Transmission of SRS

[0548] Currently, in the LTE system, the terminal supports transmission with a maximum of 4 antennas, and the SRSs transmitted by a terminal on different antennas use different SRS sequences:

[0549] For antenna the SRS sequence is

[0550]

[0551] Where, is the basic sequence determined by u and ν, u is the sequence group number, and ν is the sequence number; is the length of the SRS sequence.

[0552] Where, u = (f gh (n s ) + f ss ) mod 30, f ssRefers to the sequence - shift pattern, with 30 options. Whether group hopping is performed is determined by the high - layer parameter Group - hopping - enabled.

[0553]

[0554] c is a pseudo - random sequence, f gh (n s ) is the group - hopping pattern, with 17 options. And where n s is the time - slot label in a radio frame.

[0555] c(n)=(x1(n + N C )+x2(n + N C ))mod2

[0556] x1(n + 31)=(x1(n + 3)+x1(n))mod2

[0557] where, x2(n + 31)=(x2(n + 3)+x2(n + 2)+x2(n + 1)+x2(n))mod2

[0558] x1 and x2 are M - sequences m - sequence

[0559] x1(0)=1, x1(n)=0, n = 1,2,...,30, c init is the initialization value of the sequence. According to c init the values of x2(0)~x2(30) can be calculated

[0560] Cyclic shift of the SRS sequence is calculated according to the following formula:

[0561]

[0562]

[0563]

[0564] where, mod represents the modulo operation, configured by the high - layer, N ap ∈{1,2,4}, representing the number of antennas used for SRS transmission, with a maximum value of 4.

[0565] Next, the wireless communication system, terminal, base station provided by the embodiments of the present invention, as well as the SRS configuration method and SRS transmission method will be introduced respectively.

[0566] First, the wireless communication system provided by the embodiments of the present invention will be introduced.

[0567] Figure 5 It is a schematic structural diagram of the wireless communication system provided by the embodiments of the present invention. As Figure 5 shown, the wireless communication system includes: a base station 501 and a terminal 502

[0568] The base station 501 is used to send the configuration information of the SRS subframe to the terminal 502;

[0569] The terminal 502 is used to receive the configuration information of the SRS subframe sent by the base station 501, determine the configuration of the SRS subframe according to the received configuration information, and send SRS on the SRS subframe according to the determined configuration of the SRS subframe;

[0570] Among them, the SRS subframe is an uplink subframe or a subframe in which the number of uplink symbols is not less than the number of downlink symbols; and all uplink symbols in the SRS subframe can be used to carry SRS.

[0571] The wireless communication system provided by the embodiments of the present invention can be a system in various wireless communication networks described above. For example: it can be a Time Division Duplexing (TDD) system, such as: a TDD LTE system; it can also be a Frequency Division Duplexing (FDD) system, such as: an FDD LTE system.

[0572] The wireless communication system provided by the embodiments of the present invention can be either a single-carrier system or a multi-carrier system.

[0573] The wireless communication system provided by the embodiments of the present invention can be either a high-frequency system with a working frequency higher than 6 GHz or a system with a working frequency lower than 6 GHz.

[0574] In the wireless communication system provided by the embodiments of the present invention, the terminal 502 can be any of the aforementioned terminals. For example: it can be a user equipment, such as a User Equipment (UE) in an LTE system, or a device that communicates wirelessly with the base station in other systems, or a relay device that communicates with the base station, such as: relay.

[0575] In the wireless communication system provided by the embodiments of the present invention, the base station 501 can be any of the aforementioned base stations, and it can be a device for wireless communication with a terminal. For example, it can be an evolved NodeB (eNB) in an LTE system; or it can also include a base station controller for controlling the base station, and this base station controller controls the communication between the base station 501 and the terminal 502, allocates channels and radio resources, etc.; alternatively, this base station can also be a relay device for communicating with the terminal, such as: relay.

[0576] As described above, in the embodiments of the present invention, there are various configurations for SRS subframes:

[0577] Configuration 1: The SRS subframe is an uplink subframe

[0578] Among them, all uplink symbols in the SRS subframe can be used to carry SRS;

[0579] Optionally, some uplink symbols in the SRS subframe can also be used to carry PUCCH.

[0580] Configuration 2: The SRS subframe is a subframe in which the number of uplink symbols is not less than the number of downlink symbols

[0581] Similarly, all uplink symbols therein can be used to carry SRS. Optionally, some of the uplink symbols can also be used to carry PUCCH. At this time, SRS and PUCCH can occupy the same symbol or different symbols. When SRS and PUCCH occupy the same symbol, they respectively occupy different subcarriers.

[0582] For example: All symbols in a frequency band of the SRS subframe are used to transmit PUCCH; or

[0583] Some symbols and some frequency bands in the SRS subframe are used to transmit PUCCH.

[0584] The above two configurations are only examples. As long as more resources can be provided to carry SRS and meet the requirements of the wireless communication for SRS resources, it is okay.

[0585] Optionally, the number of uplink symbols in the SRS subframe used to carry SRS can be determined according to at least one of the following factors:

[0586] The number of terminals at the current moment;

[0587] The number of antennas of the terminal;

[0588] The location of the cell where the terminal is located;

[0589] The transmit power of the terminal;

[0590] The requirements for uplink estimation and uplink channel quality measurement;

[0591] Data transmission delay requirement;

[0592] Operating frequency of the wireless communication system.

[0593] For example, the more the number of terminals, the more uplink symbols are used to carry SRS; for another example, if each terminal uses multi-antenna transmission for SRS, more uplink symbols may also be required to carry SRS; for another example, if the terminal is at the edge of the cell, the bandwidth for transmitting SRS is smaller and the number of symbols is larger; for another example, the greater the transmission power of the terminal, the larger the bandwidth for transmitting SRS can be and the number of occupied symbols can be reduced; for another example, when the channel quality between the base station and the terminal deteriorates, the terminal may need to transmit more SRS to meet the requirements of channel quality measurement and channel estimation; for another example, when the data transmission delay requirement is small, more uplink symbols may be required to carry SRS to meet the faster downlink data scheduling by the base station according to the result of uplink channel estimation; for another example, the higher the operating frequency of the wireless communication system, the more uplink symbols may be required to carry SRS.

[0594] Therefore, the embodiments of the present invention can flexibly configure SRS according to the requirements of the system, which is more flexible than the implementation mechanism in the current LTE system.

[0595] The configuration of the SRS subframe can include the following six types:

[0596] I. Cell-level time-domain configuration

[0597] II. Terminal-level time-domain configuration

[0598] III. Symbol configuration

[0599] IV. Frequency-domain configuration

[0600] V. Comb configuration

[0601] VI. Transmission sequence configuration.

[0602] As described above, the base station 501 sends the configuration information of the SRS subframe to the terminal 502, or the configuration information is pre-defined. The terminal 502 sends SRS on the SRS subframe according to the received configuration information or the pre-defined configuration information, and the base station 501 also receives the SRS sent by the terminal 502 according to this configuration information.

[0603] In other words, the terminal 502 determines how to transmit the SRS according to the received configuration information or predefined configuration information. Similarly, the base station 501 determines how to receive the SRS of this terminal according to the transmitted configuration information and / or predefined configuration information. That is, it determines how the terminal transmits the SRS, so that the SRS of this terminal can be received accordingly. It can be understood that what the base station can achieve is the configuration of SRS transmission by multiple terminals and the reception of SRS of multiple terminals.

[0604] The transmitted configuration information here can be information related to at least one of the aforementioned six configurations.

[0605] Alternatively, optionally, the configuration of the SRS subframe can also be predefined. The terminal 502 transmits the SRS according to the predefined configuration, and the base station 501 also receives the SRS transmitted by the terminal 502 according to the predefined configuration. The predefined configuration information here can be information related to at least one of the aforementioned six configurations.

[0606] Next, the above six configurations will be described separately.

[0607] 【1. Cell-level time-domain configuration】

[0608] The cell-level time-domain configuration includes:

[0609] 1. The period of the SRS subframe of the current cell where the terminal 502 is located;

[0610] 2. The SRS subframe offset of the SRS subframe of the current cell.

[0611] The position of the SRS subframe in a radio frame can be determined by the above two configurations.

[0612] Optionally, the position of the SRS subframe in a radio frame can be predefined;

[0613] Or, optionally, the base station 501 sends the following configuration information to the terminal 502:

[0614] For indicating the value of the information, where is the period of the SRS subframe of the current cell; and

[0615] For indicating the value of the information, where is the SRS subframe offset of the current cell.

[0616] Among them, optionally, the value range of and is in units of subframes.

[0617] The terminal 502 can determine the position of the SRS subframe in the radio frame according to the frame number of the radio frame, and determine the position of the SRS subframe in the radio frame.

[0618] For example: The terminal 502 determines the subframe number of the SRS subframe in the radio frame according to one of the following formulas:

[0619]

[0620]

[0621]

[0622]

[0623] where n subf is the number of subframes included in a radio frame, n f is the frame number of the radio frame, is the SRS subframe offset parameter, is the subframe number of the SRS subframe in the radio frame.

[0624] and can be configured using higher layer signaling, and there are the following two ways of notification:

[0625] Method 1: Joint notification

[0626] For example: By configuring the index index to indicate both and as shown in the following table:

[0627]

[0628] Method 2: Independent notification

[0629] For example: Use 2 bits to indicate the period

[0630] 00 represents a period of 5 subframe lengths;

[0631] 01 represents a period of 10 subframe lengths;

[0632] 10 represents a period of 15 subframe lengths;

[0633] 11 represents a period of 20 subframe lengths.

[0634] Taking a period of 5 as an example, use 2 bits to indicate the SRS subframe offset offset

[0635] 00 represents an offset of 0;

[0636] 01 represents an offset of 1;

[0637] 10 represents an offset of 2;

[0638] 11 represents an offset of 3, and so on.

[0639]

II. Terminal-level Time Domain Configuration

[0640] Optionally, for terminal 502, it is also necessary to configure the allocated SRS subframes, such as: how many SRS subframes to send SRS at intervals, and the starting position of the SRS subframe to be sent, such as: whether to send SRS in each SRS subframe or to send it once every N SRS subframes. Since the number of SRS subframes is less than the number of subframes in a radio frame, this signaling indication method also reduces signaling overhead.

[0641] The terminal-level time domain configuration of terminal 502 may include:

[0642] The period of the SRS subframe of terminal 502

[0643] Optionally, is an integer multiple of, that is, t is a positive integer.

[0644] The above configuration can be predefined, or optionally, base station 501 can also notify terminal 502 of the configuration information of its terminal-level time domain configuration through higher-layer signaling.

[0645] For there are two notification methods:

[0646] Method 1: Direct notification

[0647] For example: when is 5, the UE-level SRS subframe period can be {5, 10, 15, 20,...}, indicated by 2 to 3 bits.

[0648] If this direct indication method is adopted, the cell-level configuration can be present or omitted.

[0649] Method 2: Notify t

[0650] For example: 00 represents sending in each SRS subframe;

[0651] 01 represents sending once every 1 SRS subframe;

[0652] 10 represents sending once every 2 SRS subframes;

[0653] 11 represents an interval of three SRS subframes.

[0654] Optionally, the terminal 502 can determine the starting position of the subframe for SRS transmission in the following manner:

[0655] Method 1

[0656] After the terminal 502 receives the configuration information of the above terminal-level time domain configuration in subframe n, the first SRS subframe that the terminal 502 can occupy for SRS transmission is the starting position of the SRS subframe for SRS transmission by the terminal 502; or

[0657] The starting position of the SRS subframe transmitted by the terminal 502 needs to have a fixed interval d from subframe n, and the first SRS subframe that the terminal 502 can occupy for SRS transmission after d subframes is the starting position of the subframe for SRS transmission by the terminal 502.

[0658] The above rules can be predefined, for example, predefined through a protocol.

[0659] The terminal-level time domain configuration of the terminal 502 may further include:

[0660] The SRS subframe offset offset of the terminal 502

[0661] Wherein, The value range of can be:

[0662] Optionally, the position of the SRS subframe that the terminal 502 can occupy for SRS transmission in a radio frame is determined according to the frame number of the radio frame, the period of the SRS subframe of the terminal 502 and the SRS subframe offset of the terminal is determined.

[0663] Wherein, represents from which SRS subframe of a radio frame the terminal 502 starts to transmit SRS. For example: if there are 4 cell-level SRS subframes in a radio frame, then 2 bits are used to indicate the starting position of the SRS subframe transmitted by the terminal 502. For example:

[0664] 00 represents starting transmission from the first SRS subframe;

[0665] 01 represents starting transmission from the second SRS subframe;

[0666] 10 represents starting transmission from the third SRS subframe;

[0667] 11 represents starting transmission from the fourth SRS subframe.

[0668] Optionally, the base station 501 may also jointly notify the period of the SRS subframe of the terminal 502 and the SRS subframe offset of the terminal 502

[0669] For example: by configuring the index index to indicate both and as shown in the following table:

[0670]

[0671] or

[0672]

[0673]

III. Symbol Configuration

[0674] Within the SRS subframe, the base station 501 may configure the transmission symbols of the SRS for different terminals. The symbol transmission method of a terminal on the SRS subframe may include but is not limited to any one of the following methods:

[0675] The terminal may use all the uplink symbols within the SRS subframe for SRS transmission; or

[0676] The terminal may use a part of the uplink symbols within the SRS subframe for SRS transmission, for example: several adjacent uplink symbols, or several uplink symbols at intervals.

[0677] The above symbol transmission method of the terminal on the SRS subframe may be predefined or notified to the terminal through high-layer signaling.

[0678] If the base station 501 notifies the terminal 502 through high-layer signaling, the base station 501 needs to send indication information for indicating the symbol transmission method of the terminal 502 on the SRS subframe to the terminal 502. For example: use 2 bits to indicate one of the above three symbol transmission methods:

[0679] 00 represents using all the uplink symbols within the SRS subframe for SRS transmission;

[0680] 01 represents using several adjacent uplink symbols within the SRS subframe for SRS transmission;

[0681] 10 represents using the uplink symbols that are spaced one symbol apart from each other within the SRS subframe for SRS transmission;

[0682] 11 represents using the uplink symbols that are spaced two symbols apart from each other within the SRS subframe for SRS transmission.

[0683] If the symbol transmission method of the terminal 502 on the SRS subframe is:

[0684] The terminal 502 transmits SRS on multiple adjacent symbols in an SRS subframe or transmits SRS on symbols that are spaced apart by a specified number of symbols from each other in the SRS subframe, then

[0685] The symbol configuration of the terminal 502 may further include:

[0686] The starting position of the symbol occupied by the SRS transmitted by the terminal 502. This starting position can be predefined or the base station 501 can notify the terminal 502 through higher layer signaling. This starting position can be subframe-level configuration or slot-level configuration, which will be described separately below.

[0687] I. Subframe-level configuration (i.e., the numbering of the symbol positions has a subframe as a period)

[0688] This subframe-level configuration may include: the starting position of the symbol on which the terminal 502 transmits SRS in the SRS subframe in the SRS subframe or where represents the total number of symbols in a subframe. For example, in the current LTE system, for normal CP it is 14, and for extended CP it is 12.

[0689] Optionally, this subframe-level configuration can be predefined or notified by the base station 501 to the terminal 502. For example, the base station 501 can use 2 to 4 bits to indicate this starting position.

[0690] After the terminal 502 determines this starting position according to the predefined or the configuration information sent by the base station 501, it transmits SRS in the entire subframe according to one of the above symbol transmission methods.

[0691] For example: the starting position is the second symbol, and the symbol transmission method is: use each uplink symbol that is spaced apart by two symbols within the SRS subframe for SRS transmission. Then the situation where the terminal 502 transmits SRS in the entire SRS subframe is as Figure 6 shown, where l is the symbol label and k is the subcarrier label.

[0692] Optionally, the subframe-level configuration may further include at least one of the following configurations:

[0693] The total number of symbols on which the terminal 502 transmits SRS in the SRS subframe;

[0694] The ending position of the symbol on which the terminal 502 transmits SRS in the SRS subframe in the SRS subframe.

[0695] Optionally, the sub-frame level configuration can also be: the terminal 502 sends the index information of the symbols of the SRS on the SRS sub-frame. This index information can be direct information, such as the binary codes corresponding to symbols 0, 2, and 4, or indirect information. The terminal 502 determines the positions of the symbols for sending the SRS according to the indirect information and a pre-known formula.

[0696] Optionally, the above two sub-frame level configurations can be predefined or notified by the base station 501 to the terminal for the configuration information indicating these two configurations.

[0697] II. Time slot level configuration (i.e., the numbering of the symbol positions has a time slot as a cycle)

[0698] The time slot level configuration can include:

[0699] The terminal 502 sends the time slots occupied by the SRS on the SRS sub-frame;

[0700] The starting positions of the symbols of the SRS sent by the terminal 502 in each time slot of the SRS sub-frame.

[0701] Similarly, the time slot level configuration can also include at least one of the following configurations:

[0702] The total number of symbols of the SRS sent by the terminal 502 within one time slot on the SRS sub-frame;

[0703] The ending positions of the symbols of the SRS sent by the terminal 502 in each time slot of the SRS sub-frame.

[0704] Optionally, the sub-frame level configuration can also be: the terminal 502 sends the index information of the symbols of the SRS on a certain time slot of the SRS sub-frame, that is, the index information has a time slot as a cycle. This index information can be direct information, such as the binary codes corresponding to symbols 0, 2, and 4, or indirect information. The terminal 502 determines the positions of the symbols for sending the SRS on a certain time slot according to the indirect information and a pre-known formula.

[0705] Similarly, the above configuration can be predefined or the base station 501 notifies the terminal 502 of the configuration information of this configuration.

[0706] For example: 2 bits can be used to indicate the starting position or where represents the total number of symbols in one time slot.

[0707] There are two options for the time slot level configuration:

[0708] Option 1

[0709] Both the first time slot and the second time slot are carried out according to the starting position and symbol transmission mode. At this time, the terminal 502 sends the time slot occupied by the SRS on the SRS subframe, and this information can be omitted.

[0710] For example: The time slot-level configuration indicates that the starting position is the second symbol, and the symbol transmission mode is that the terminal 502 uses each uplink symbol with an interval of two symbols within the SRS subframe for SRS transmission. Then, the transmission situation of the SRS in the entire subframe is as Figure 7 shown.

[0711] Option Two

[0712] Use 1 bit to indicate in which time slot to transmit. For example: 0 represents the first time slot, as Figure 8 shown; 1 represents the second time slot, as Figure 9 shown.

[0713] The starting position and symbol transmission mode of each time slot are configured separately. For example Figure 9 in the configuration, SRS is only sent in the first time slot and not in the second time slot.

[0714]

IV. Frequency Domain Configuration

[0715] The frequency domain configuration of the terminal 502 may include:

[0716] The frequency domain resource mode occupied by the SRS sent by the terminal 502 on each symbol of the SRS subframe. This frequency domain resource mode may include, but is not limited to, one of the following modes:

[0717] Mode One: The frequency domain resources occupied by the SRS sent by the terminal 502 on each symbol of the SRS subframe are the same;

[0718] Mode Two: The frequency domain resources occupied by the SRS sent by the terminal 502 on each time slot of the SRS subframe are different;

[0719] Mode Three: The frequency domain resources occupied by the SRS sent by the terminal 502 on each symbol of the SRS subframe are different.

[0720] Optionally, this frequency domain resource mode may be predefined, or the base station 501 notifies the terminal 502 of the configuration information of this frequency domain resource mode.

[0721] Below, the above three modes will be described separately.

[0722] Mode One

[0723] The frequency domain resources occupied by the SRS sent by the terminal 502 on each symbol of the SRS subframe are the same.

[0724] Optionally, in Mode One, the frequency domain configuration of the terminal 502 may further include:

[0725] The bandwidth occupied by the terminal in the current cell for transmitting SRS, i.e., the cell-level frequency-domain configuration, and the corresponding information can be referred to as the cell common bandwidth information C SRS ;

[0726] Under the bandwidth occupied by the terminal 502 for transmitting SRS in the above-mentioned current cell, the corresponding information can be referred to as the terminal-specific bandwidth information B SRS ;

[0727] The starting frequency-domain position of the bandwidth occupied by the terminal 502 for transmitting SRS, and the corresponding information can be referred to as the starting frequency-domain position information n RRC .

[0728] One or more of the configuration information of the above three frequency-domain configurations can be predefined, and the others can be indicated by the base station 501 sending configuration information to the terminal 502

[0729] For example: For the bandwidth occupied by the terminal in the current cell for transmitting SRS, the base station 501 can send the cell common bandwidth information C SRS for indication;

[0730] For another example: For the bandwidth occupied by the terminal 502 for transmitting SRS, the base station 501 can send the terminal-specific bandwidth information B SRS for indication;

[0731] For another example: For the starting frequency-domain position of the bandwidth occupied by the terminal 502 for transmitting SRS, the base station 501 can send the starting frequency-domain position information n RRC for indication

[0732] For C SRS 、B SRS and n RRC , optionally, it can be defined in a similar manner to that in the foregoing 3GPP TS36.211. The possible difference is that, in the embodiments of the present invention, more SRS resources are provided than in the current LTE system. Therefore, the value ranges of the above three parameters may be larger than those of the parameters in the current LTE system, and its implementation can refer to the implementation in the current protocol, which will not be elaborated here

[0733] In Mode 1, the terminal 502 can determine its occupied frequency-domain resources according to the following information:

[0734] The cell common bandwidth information C of the current cell SRS ;

[0735] The terminal-specific bandwidth information B of the terminal 502 SRS ;

[0736] The starting frequency-domain position information n of the terminal 502RRC ;

[0737] The terminal 502 can start from the indicated starting position in the frequency domain and send SRS within the indicated bandwidth range of B. RRC SRS

[0738] Method 2

[0739] The frequency-domain resources occupied by the SRS sent by the terminal 502 in each time slot of the SRS subframe are different, that is, the frequency-domain resources occupied by the SRS sent in one time slot are different from those occupied by the SRS sent in another time slot.

[0740] Under Method 2, there are four alternative schemes available for determining the frequency-domain resources occupied by the terminal 502 when sending SRS.

[0741] Alternative Scheme 1

[0742] In Alternative Scheme 1, the frequency-domain configuration of the terminal 502 may include:

[0743] The bandwidth occupied by the SRS sent by the terminals in the current cell, and the corresponding information can be referred to as the cell common bandwidth information C SRS ;

[0744] Under the bandwidth occupied by the SRS sent by the terminals in the current cell, the bandwidth occupied by the SRS sent by the terminal 502 in the time slot numbered n s

[0745] The starting position in the frequency domain of the bandwidth occupied by the SRS sent by the terminal in the time slot numbered n s

[0746] Optionally, the above three configurations may be predefined or the base station 501 may send configuration information to the terminal 502 to indicate the terminal 502.

[0747] In Alternative Scheme 1,

[0748] The terminal 502 can determine the frequency-domain resources occupied by the SRS sent on each symbol in the time slot numbered n s

[0749] For the time slot numbered n s

[0750] Alternative Option 2

[0751] In Alternative Option 2, the frequency domain configuration of the terminal 502 is the same as that of Alternative Option 1. The difference is that the method for the terminal 502 to determine at least one of the occupied bandwidth and the frequency domain starting position in the time slot with the serial number n s is different. The specific method of Alternative Option 2 is as follows:

[0752] The terminal 502 determines the terminal-specific bandwidth information in the time slot with the serial number n according to the following formula s

[0753] where is the maximum value in the value range of B SRS and / or

[0754] The terminal 502 determines the frequency domain starting position information in the time slot with the serial number n according to the following formula s

[0755] or

[0756] and or

[0757] and or

[0758] and

[0759] where is the maximum value in the value range of n RRC , represents that the hopping granularity is times of the total bandwidth. M takes positive integer values, such as 2, 3, 4,... is the number of RBs included in the minimum bandwidth for SRS transmission, and the value is predefined. For example, the value in the prior art is 4.

[0760] where n RRC and B SRS are defined and configured in the same way as in the previous Method 1, and the implementation of Method 1 can be referred to and will not be elaborated here.

[0761] Alternative Option 3

[0762] In Alternative Option 3, the frequency domain configuration of the terminal 502 may further include:

[0763] The bandwidth occupied by the terminals in the current cell for sending SRS. The corresponding information may be referred to as the cell common bandwidth information C​​SRS ;

[0764] At the bandwidth occupied by the terminal sending SRS in the current cell, the terminal 502 occupies the same bandwidth on each time slot used for sending SRS. At this time, the bandwidth occupied by the terminal 502 when sending SRS on each time slot is the same, and the information corresponding to this bandwidth can be referred to as the terminal-specific bandwidth information B SRS ;

[0765] The terminal sends SRS in the time slot with the serial number n in the SRS subframe s The frequency-domain starting position of the bandwidth occupied by the terminal when sending SRS in the time slot, and the corresponding information can be referred to as the frequency-domain starting position information

[0766] Optionally, the above three configurations can be predefined, or the base station 501 sends configuration information to instruct the terminal 502

[0767] In alternative solution three

[0768] The terminal 502 can determine the frequency-domain resources occupied by the SRS sent on each symbol in the time slot with the serial number n in the SRS subframe according to the above three configurations s

[0769] For the time slot with the serial number n in the SRS subframe used by the terminal 502 to send SRS s The terminal 502 starts from the frequency-domain starting position indicated by and sends SRS within the bandwidth indicated by B SRS

[0770] Alternative solution four

[0771] In alternative solution four, the frequency-domain configuration of the terminal 502 is the same as that of alternative solution three. The difference is that the method for the terminal 502 to determine the frequency-domain starting position in the time slot with the serial number n is different. The specific method of alternative solution four is as follows s

[0772] The terminal 502 determines the frequency-domain starting position information in the time slot with the serial number n according to the following formula s

[0773] or

[0774] and or

[0775] and or

[0776] and ​​​​

[0777] Among them, is the maximum value in the value range of n, RRC and represents that the frequency hopping granularity is times the total bandwidth. M takes positive integer values, such as 2, 3, 4, … is the number of RBs included in the minimum bandwidth for SRS transmission, and its value is predefined. For example, the value in the prior art is 4.

[0778] Among them, the definitions and configuration methods of n RRC and B SRS are the same as those in the previous Method 1, and the implementation of Method 1 can be referred to, which will not be elaborated here.

[0779] Based on the four alternative schemes of Method 2, it can be seen that the cell common bandwidth information C SRS and the terminal-specific bandwidth information together determine the bandwidth occupied by the terminal 502 for SRS transmission. The frequency domain resources occupied by the terminal 102 are uniquely determined by the terminal-specific bandwidth information and the frequency domain starting position information.

[0780] As long as the frequency domain resources occupied by the terminal 102 are different for each time slot according to one of the terminal-specific bandwidth information and the frequency domain starting position information, the frequency domain resources occupied by the terminal 502 in different time slots are different.

[0781] Referring to the following table, for various different definitions of the terminal-specific bandwidth information and the frequency domain starting position information, the alternative schemes of Method 2 include but are not limited to the following eight. To distinguish the numbering methods of the above alternative schemes, different alternative schemes are distinguished here by A, B, …

[0782]

[0783] Method 3

[0784] The frequency domain resources occupied by the SRS sent by the terminal 502 on each symbol of the SRS subframe are different, that is, the frequency domain resources occupied by the SRS sent on one symbol are different from those occupied by the SRS sent on another symbol.

[0785] Similar to Method 2, Method 3 also has four alternative schemes for determining the frequency domain resources occupied by the terminal 502 for SRS transmission.

[0786] Alternative Scheme 1

[0787] In Alternative Scheme 1, the frequency domain configuration of the terminal 502 may further include:

[0788] ​The bandwidth occupied by the terminal in the current cell for transmitting SRS, and the corresponding information can be referred to as the cell common bandwidth information C SRS ;

[0789] Under the bandwidth occupied by the terminal in the current cell for transmitting SRS, the bandwidth occupied by terminal 502 for transmitting SRS on the symbol with serial number l, and the corresponding information can be referred to as the terminal specific bandwidth information

[0790] The frequency domain starting position of the bandwidth occupied by the terminal for transmitting SRS on the symbol with serial number l in the SRS subframe, and the corresponding information can be referred to as the frequency domain starting position information

[0791] Optionally, the above three configuration information items can be predefined, or the base station 501 can send configuration information to instruct terminal 502

[0792] In alternative solution one

[0793] Terminal 502 can determine the frequency domain resources occupied by the SRS transmitted on the symbol with serial number l in the SRS subframe according to the above three configuration information C SRS , and For the symbol with serial number l in the SRS subframe used by terminal 502 to transmit SRS, terminal 502 starts from the frequency domain starting position indicated by

[0794] and transmits SRS within the bandwidth indicated by

[0795] Alternative solution two

[0796] In alternative solution two, the frequency domain configuration of terminal 502 is the same as that of alternative solution one. The difference is that at least one of the methods for terminal 502 to determine the occupied bandwidth and frequency domain starting position on the symbol with serial number l is different. The specific method of alternative solution two is as follows

[0797] Terminal 502 determines the terminal specific bandwidth information on the symbol with serial number l according to the following formula

[0798] where is the maximum value in the value range of B SRS ; and / or

[0799] Terminal 502 determines the frequency domain starting position information on the symbol with serial number l according to the following formula

[0800] or ​​

[0801] and or

[0802] and or

[0803] and

[0804] wherein, is the maximum value in the value range of n RRC the maximum value in the value range, represents that the granularity of frequency hopping is times the total bandwidth, M takes positive integers, such as 2, 3, 4,... is the number of RBs included in the minimum bandwidth for SRS transmission, and the value is predefined. For example, the prior art value is 4.

[0805] wherein, n RRC and B SRS are defined and configured in the same way as in the previous Method 1, and the implementation of Method 1 can be referred to and will not be elaborated here.

[0806] Alternative Solution 3

[0807] In Alternative Solution 3, the frequency domain configuration of the terminal 502 may further include:

[0808] The bandwidth occupied by the terminal in the current cell for transmitting SRS, and the corresponding information may be referred to as the cell common bandwidth information C SRS ;

[0809] Under the bandwidth occupied by the terminal in the current cell for transmitting SRS, the same bandwidth occupied by the terminal 502 on each symbol for transmitting SRS, and the corresponding information may be referred to as the terminal specific bandwidth information B SRS ;

[0810] The frequency domain starting position of the bandwidth occupied by the terminal for transmitting SRS on the symbol with serial number l in the SRS subframe, and the corresponding information may be referred to as the frequency domain starting position information

[0811] Optionally, the above three configuration information items may be predefined, or the base station 501 may send configuration information to instruct the terminal 502.

[0812] In Alternative Solution 3,

[0813] The terminal 502 may determine the frequency domain resources occupied by the SRS transmitted on the symbol with serial number l in the SRS subframe according to the above three configuration information items C SRS , B SRS and ​

[0814] For the symbol with sequence number l in the SRS subframe used by the terminal 502 to transmit SRS, the terminal 502 starts from the indicated starting position in the frequency domain and transmits SRS within the bandwidth indicated by B SRS

[0815] Alternative Solution Four

[0816] In Alternative Solution Four, the frequency domain configuration of the terminal 502 is the same as that of Alternative Solution Three. The difference is that the method for the terminal 502 to determine the starting position in the frequency domain on the symbol with sequence number l is different. The specific method of Alternative Solution Four is as follows:

[0817] The terminal 502 determines the starting position information in the frequency domain on the symbol with sequence number l according to the following formula

[0818] or

[0819] and or

[0820] and or

[0821] and

[0822] where is the maximum value in the value range of n RRC represents that the hopping granularity is times the total bandwidth. M takes positive integer values such as 2, 3, 4,... is the number of RBs included in the minimum bandwidth for SRS transmission, and the value is predefined. For example, in the prior art, the value is 4.

[0823] where n RRC and B SRS are defined and configured in the same way as in the previous Method One. The implementation of Method One can be referred to and will not be elaborated here.

[0824] Similar to Method Two, referring to the following table, for various different definitions of the terminal dedicated bandwidth information and the starting position information in the frequency domain, the alternative solutions of Method Three may also include but are not limited to the following eight. To distinguish from the numbering method of the above alternative solutions, different alternative solutions are distinguished here by A, B,...

[0825]

[0826] ​​​In the above item 4, frequency domain configuration, the frequency domain resource refers to the Physical Resource Block (PRB). For example, the frequency domain resources occupied by the terminal 502 on different symbols are different, which means that the PRBs occupied by the terminal 502 on different symbols are different.

[0827] This frequency domain configuration is different from the following item 5, comb configuration. The comb configuration refers to which specific subcarriers in the PRB are occupied by the terminal 502. If the terminal 502 uses a comb structure when transmitting SRS, then generally but not limited to, the spacing between the subcarriers occupied by the terminal on different symbols is the same. For example, if the subcarriers occupied on the symbol numbered 2 are spaced 2 subcarriers apart from each other, then the subcarriers occupied on the symbol numbered 4 are also spaced 2 subcarriers apart from each other.

[0828] The comb configuration of the terminal 102 on different time slots or different symbols is different, which generally means that the starting positions of the comb subcarriers occupied are different.

[0829]

Item 5, comb configuration

[0830] In the embodiments of the present invention, the transmission of SRS can adopt a comb structure with a subcarrier spacing greater than 1 (spacing n comb subcarriers, n comb can be determined according to the coherent bandwidth). In the current LTE system, when using a comb structure to transmit SRS, it can only be spaced by one subcarrier. Therefore, by adopting the solution provided by the embodiments of the present invention, more terminals or antennas can be accommodated. As Figure 10 shown, it is transmitted with a spacing of 3 subcarriers. Among them, the antenna ports P1 to P4 are different antenna ports of the terminal 502 (UE1); UE1, UE2, UE3, and UE4 are different terminals in the current cell.

[0831] n comb can be predefined or notified to the terminal 502 by the base station 501 by sending a configuration message.

[0832] For example: using 2 bits to notify, 00 represents a spacing of 1 subcarrier, 01 represents a spacing of 2 subcarriers, 10 represents a spacing of 3 subcarriers, and 11 represents a spacing of 4 subcarriers.

[0833] In the embodiments of the present invention, the terminal 502 can transmit SRS using a single antenna or multiple antennas.

[0834] If the terminal 502 transmits SRS using a single antenna, then for each PRB in each symbol occupied by the SRS transmitted by the terminal 502, the terminal 502 determines to occupy non - consecutive subcarriers in the PRB of the symbol, and the subcarriers occupied are spaced n comb subcarriers apart from each other;

[0835] If the terminal 502 uses multiple antennas to transmit SRS, for each PRB in a symbol occupied by the SRS transmitted by the terminal 502, the terminal 502 determines non - consecutive sub - carriers in the PRB that occupies the symbol, and for one antenna used by the terminal 502, the sub - carriers occupied by the SRS transmitted through this antenna are spaced by n comb sub - carriers.

[0836] Optionally, the comb configuration of the terminal 502 may further include: the manner in which the comb sub - carriers occupied by the SRS transmitted by the terminal 502 on each symbol of the SRS sub - frame.

[0837] The manner of the comb sub - carriers may include but is not limited to one of the following manners:

[0838] Manner 1: For different symbols occupied by the SRS transmitted by the terminal 502, the terminal 502 occupies the same comb sub - carriers in the symbol; or

[0839] Manner 2: For symbols occupied by the SRS transmitted by the terminal 502 that are in different time slots, the terminal 502 occupies different comb sub - carriers in the symbol; or

[0840] Manner 3: For different symbols occupied by the SRS transmitted by the terminal 502, the terminal 502 occupies different comb sub - carriers in the symbol.

[0841] For the above several manners of comb sub - carriers, for different symbols, the frequency - domain resources occupied by the SRS transmitted by the terminal 502 may be the same or different;

[0842] Optionally, the manner of the comb sub - carriers may be predefined or notified to the terminal 502 by the base station 501 through sending configuration information.

[0843] Below, the above three manners will be described separately.

[0844] Manner 1

[0845] In Manner 1, for different symbols occupied by the SRS transmitted by the terminal 502, the terminal 502 occupies the same comb sub - carriers in the symbol, and the comb configuration of the terminal 502 may further include:

[0846] Among the sub - carriers occupied by the SRS transmitted by the terminal 502, the position of the starting sub - carrier in the PRB, and the corresponding configuration information may be

[0847] Wherein,

[0848] Optionally, this configuration can be predefined or the base station 501 can notify the terminal 502 by sending a configuration message.

[0849] Method 2

[0850] In Method 2, for symbols in different time slots occupied by the SRS sent by the terminal 502, the terminal 502 occupies different comb subcarriers in the symbols. The comb configuration of the terminal 502 may further include:

[0851] For each time slot of the SRS subframe available to the terminal 502, among the subcarriers occupied by the SRS that the terminal 502 can send in this time slot, the position of the starting subcarrier in this PRB.

[0852] For each time slot of the SRS subframe available to the terminal 502, the configuration parameters of this configuration can be:

[0853] Optionally, this configuration can be predefined or the base station 501 can notify the terminal 502 by sending a configuration message.

[0854] Alternatively, in Method 2, for the time slot with the serial number n of the SRS subframe available to the terminal 502 s the position parameter of the position of the starting subcarrier in this PRB among the subcarriers occupied by the SRS that the terminal 502 can send in this time slot can be determined in the following manner:

[0855]

[0856] Then for the time slot with the serial number n of the SRS subframe available to the terminal 502 s the terminal 502 starts to send the SRS from the starting subcarrier indicated.

[0857] For each time slot of the SRS subframe available to the terminal 502, this unified configuration can be predefined or the base station 501 can notify the terminal 502 by sending a configuration message.

[0858] Method 3

[0859] In Method 3, for different symbols occupied by the SRS sent by the terminal 502, the terminal 502 occupies different comb subcarriers in the symbols. The comb configuration of the terminal 502 may further include:

[0860] For each symbol of the SRS subframe available to the terminal 502, among the subcarriers occupied by the SRS that the terminal 502 can send in this symbol, the position of the starting subcarrier in this PRB.

[0861] For each symbol of the SRS subframe available for the terminal 502, the configuration parameters of this configuration can be as follows:

[0862]

[0863] Optionally, this configuration can be predefined or the base station 501 can notify the terminal 502 by sending a configuration message.

[0864] Alternatively, in Mode 3, for the symbol with sequence number l of the SRS subframe available for the terminal 502, among the subcarriers occupied by the SRS that the terminal 502 can transmit on this symbol, the position parameter of the starting subcarrier in this PRB can be determined according to the following formula:

[0865]

[0866] Then, for the symbol with sequence number l of the SRS subframe available for the terminal 502, the terminal 502 starts transmitting the SRS from the starting subcarrier indicated.

[0867] For each symbol of the SRS subframe available for the terminal 502, this unified configuration can be predefined or the base station 501 can notify the terminal 502 by sending a configuration message.

[0868]

VI. Transmission Sequence Configuration

[0869] The ways of the SRS basic sequence used by the terminal 502 include but are not limited to one of the following ways:

[0870] The SRS basic sequences used by the SRSs transmitted by the terminal 502 on different symbols of an SRS subframe are the same. For example, when there is no group hopping, this way is adopted; or

[0871] The SRS basic sequences used by the SRSs transmitted by the terminal 502 on different time slots of an SRS subframe are different. For example, when there is group hopping, this way is adopted; or

[0872] The SRS basic sequences used by the SRSs transmitted by the terminal 502 on different symbols of an SRS subframe are different. For example, when there is group hopping, this way is adopted.

[0873] Among them, if the SRS basic sequences used by the SRSs transmitted by the terminal 502 on different time slots of an SRS subframe are different,

[0874] then the terminal 502 can determine the group hopping format f of the SRS basic sequence used for transmitting the SRS on the time slot with sequence number n s of the SRS subframe according to the following formulagh (n s ) is:

[0875]

[0876] c is a pseudo-random sequence, initialized to denotes floor division, is the cell identifier of the current cell.

[0877] Among them, if the SRS basic sequences used by the terminal 502 for SRS transmitted on different symbols of an SRS subframe are different, the terminal 502 can determine the group hopping format f of the SRS basic sequence used for SRS transmission on the symbol with serial number l according to the following formula gh (l) is:

[0878]

[0879] c is a pseudo-random sequence, initialized to denotes floor division, is the cell identifier of the current cell.

[0880] If the terminal 502 uses multiple antennas to transmit SRS, the number of antennas is N ap ∈ {1, 2, 4, 8, 10, 16,...}, which can be predefined or notified to the terminal 502 by the base station 501 through higher layer signaling. To implement multi-antenna transmission, the following three methods can be adopted:

[0881] Method 1, code division

[0882] In Method 1, for the antenna with antenna serial number , the SRS sequence is:

[0883]

[0884] Among them, is the basic sequence determined by u and ν, u is the sequence group number, and ν is the sequence number; is the length of the SRS sequence. Optionally, the transmission sequence configuration may further include: The terminal 502 can determine the cyclic shift of the SRS sequence of the SRS transmitted on the antenna with serial number according to

[0885] Optionally, this configuration can be predefined or notified to the terminal 502 by the base station 501 by sending a configuration message.

[0886] Optionally, satisfies:

[0887]

[0888] Among them, N ap is the number of antennas used by the terminal 502 to transmit SRS. is a parameter for determining the cyclic shift of the SRS sequence of the SRS transmitted by the terminal 502 on each antenna. It can be configured by high-layer signaling or predefined. This parameter can be different for different terminals and is used to reduce interference between terminals.

[0889] Method 2: Frequency division

[0890] When the comb interval n comb ≥ 1 subcarrier, when N ap ≥ 2, different antennas can be mapped to different combs.

[0891] For example, it is calculated using the following formula:

[0892]

[0893] Optionally, this parameter can be predefined or the base station 501 can notify the terminal 502 by sending a configuration message.

[0894] Method 3: Time division

[0895] Different antennas can occupy different symbols, and better coverage can be obtained compared with code division.

[0896] For example: The total number of antennas for the current transmission is N ap , and the total number of symbols in a subframe occupied is l sum . At this time, the antenna occupies the th symbol configured.

[0897] For example: When there are 8 antennas and 4 symbols, antennas 0, 4 can use the first symbol, antennas 1, 5 can use the second symbol, antennas 2, 6 can use the third symbol, and antennas 3, 7 can use the fourth symbol.

[0898] The above three methods of code division, frequency division, and time division can also be used in any two or three combinations simultaneously.

[0899] For example: Using code division, time division, and frequency division simultaneously. When there are 8 antennas, the number of SRS symbols is 2, and the subcarrier spacing is 3, antennas 0, 2, 4, 6 transmit on different subcarriers of the first symbol, and antennas 1, 3, 5, 7 transmit on different subcarriers of the second symbol, as Figure 11As shown, among them, antenna ports P0 to P7 are different antenna ports of the terminal 502 (UE1).

[0900] In the embodiments of the present invention, since a multi-antenna scheme of code division, frequency division, and time division can be adopted, SRS supports more antenna transmissions.

[0901] In the above configurations, they can be used in combination with each other. For example: combining the fourth, frequency domain configuration and the fifth, comb configuration can achieve frequency hopping of SRS.

[0902] In the embodiments of the present invention, the frequency hopping scheme of SRS may include:

[0903] Scheme 1, time slot-level frequency hopping;

[0904] Scheme 2, symbol-level frequency hopping.

[0905] By adopting different frequency hopping schemes of SRS, frequency diversity gain can be obtained, and the transmission performance of SRS can be improved.

[0906] Next, the two frequency hopping schemes will be described in detail respectively.

[0907] Scheme 1, time slot-level frequency hopping;

[0908] Time slot-level frequency hopping includes four types: Which frequency hopping method to specifically adopt can be predefined or the base station 501 notifies the terminal 502 by sending a configuration message. For example: The base station sends 2-bit configuration information to the terminal 502 through high-layer signaling to indicate frequency hopping selection

[0909] Next, four optional time slot-level frequency hopping methods will be introduced. The actual frequency hopping method is not limited to the following four, and the following is only an example.

[0910] Time slot-level frequency hopping method 1

[0911] The physical resource blocks (Physical Resource Blocks, PRBs) occupied by the SRS sent by the terminal 502 are the same on different time slots (that is, the frequency domain resources occupied on different time slots are the same), and the comb subcarriers are the same.

[0912] Time slot-level frequency hopping method 2

[0913] The PRBs occupied by the SRS sent by the terminal 502 are the same on different time slots (that is, the frequency domain resources occupied on different time slots are the same), and the comb subcarriers are different, as Figure 12 shown. The configuration of the comb subcarriers can refer to the description in [Five. Comb Configuration], and the configuration of the PRBs on different time slots can refer to [Four. Frequency Domain Configuration].

[0914] Time slot-level frequency hopping method 3

[0915] The SRS sent by the terminal 502 occupies different PRBs in different time slots (i.e., occupies different frequency-domain resources in different time slots), and the comb subcarriers are the same. For example, Figure 13 as shown. The configuration of the comb subcarriers can refer to the description in

V. comb Configuration

IV. Frequency-Domain Configuration

[0916] Time-Slot-Level Hopping Mode Four

[0917] The SRS sent by the terminal 502 occupies different PRBs in different time slots (i.e., occupies different frequency-domain resources in different time slots), and the comb subcarriers are different. For example, Figure 14 as shown. The configuration of the comb subcarriers can refer to the description in

V. comb Configuration

IV. Frequency-Domain Configuration

[0918] Solution Two: Symbol-Level Hopping

[0919] Similar to time-slot-level hopping, symbol-level hopping also includes four types: Which hopping mode to adopt can also be predefined in advance, or the base station 501 can notify the terminal 502 by sending a configuration message. For example: 2-bit configuration information can be sent to the terminal 502 through high-layer signaling to indicate the hopping selection

[0920] Next, four optional symbol-level hopping modes are introduced. The actual hopping mode is not limited to the following four, and the following is only an example.

[0921] Symbol-Level Hopping Mode One

[0922] The SRS sent by the terminal 502 occupies the same PRBs in different symbols (i.e., occupies the same frequency-domain resources in different symbols), and the positions of the comb subcarriers are the same. For example, Figure 15 as shown, where the resource elements (REs) of the same pattern belong to the same terminal in the current cell. The configuration of the comb subcarriers can refer to the description in

V. comb Configuration

IV. Frequency-Domain Configuration

[0923] Symbol-Level Hopping Mode Two

[0924] The SRS sent by the terminal 502 occupies the same PRBs in different symbols, and the positions of the comb subcarriers are different. For example, Figure 16 as shown. The configuration of the comb subcarriers can refer to the description in

V. comb Configuration

IV. Frequency-Domain Configuration

[0925] Symbol-Level Hopping Mode Three

[0926] The SRS sent by the terminal 502 occupies different PRBs on different symbols, and the comb subcarrier positions are the same. For example Figure 17 as shown. The configuration of the comb subcarriers can be referred to the description in [V. comb Configuration], and the configuration of the PRBs on different symbols can be referred to [IV. Frequency Domain Configuration].

[0927] Symbol-level frequency hopping mode four

[0928] The SRS sent by the terminal 502 occupies different PRBs on different symbols, and the comb subcarrier positions are different. For example Figure 18 as shown. The configuration of the comb subcarriers can be referred to the description in [V. comb Configuration], and the configuration of the PRBs on different symbols can be referred to [IV. Frequency Domain Configuration].

[0929] Based on the same inventive concept, the embodiments of the present invention further provide an SRS configuration method, an SRS transmission method, a base station, and a terminal. Since the principle of solving the technical problem is the same as that of the wireless communication system provided by the embodiments of the present invention, the implementation can refer to the implementation of the system, and the repeated parts will not be described again.

[0930] Figure 19 It is a flowchart of the SRS configuration method provided by the embodiments of the present invention. As Figure 19 shown, the method includes the following steps:

[0931] S1902: The base station sends the configuration information of the SRS subframe to the terminals in the current cell, instructing the terminals to send SRS on the SRS subframe according to the received configuration information;

[0932] Optionally, before step S1902, it further includes step S1901: The base station determines the configuration information of the SRS subframe to be sent to the terminal;

[0933] Optionally, after step S1902, it further includes step S1903: The base station receives the SRS sent by the terminal according to the configuration information sent to the terminal and / or the predefined configuration information.

[0934] Wherein, the SRS subframe is an uplink subframe, or a subframe with the number of uplink symbols not less than the number of downlink symbols;

[0935] And all the uplink symbols in the SRS subframe can be used to carry SRS.

[0936] Other optional implementation manners of the method can refer to the base station 501 in the wireless communication system provided by the embodiments of the present invention, and will not be described again here.

[0937] Figure 20 It is a flowchart of the SRS transmission method provided by the embodiments of the present invention. AsFigure 20 As shown in the figure, the method includes the following steps:

[0938] S2001: The terminal receives the configuration information of the SRS subframe sent by the base station in the current cell where the terminal is located;

[0939] S2002: The terminal determines the configuration of the SRS subframe according to the received configuration information;

[0940] S2003: The terminal sends the SRS on the SRS subframe according to the determined configuration of the SRS subframe;

[0941] Among them, the SRS subframe is an uplink subframe, or a subframe in which the number of uplink symbols is not less than the number of downlink symbols;

[0942] And all uplink symbols in the SRS subframe can be used to carry the SRS.

[0943] For other optional implementation manners of this method, reference can be made to the terminal 502 in the wireless communication system provided in the embodiments of the present invention, which will not be elaborated here.

[0944] Figure 21 This is the structural schematic diagram of the first base station provided in the embodiments of the present invention. As Figure 21 shown, the base station includes:

[0945] A sending module 2101, configured to send the configuration information of the SRS subframe to the terminal in the current cell, and instruct the terminal to send the SRS on the SRS subframe according to the received configuration information;

[0946] Optionally, the base station further includes: a processing module 2102, configured to determine the configuration information of the SRS subframe of the terminal in the current cell;

[0947] Among them, the SRS subframe is an uplink subframe, or a subframe in which the number of uplink symbols is not less than the number of downlink symbols;

[0948] And all uplink symbols in the SRS subframe can be used to carry the SRS.

[0949] For other optional implementation manners of this base station, reference can be made to the base station 501 in the wireless communication system provided in the embodiments of the present invention, which will not be elaborated here.

[0950] Figure 22 This is the structural schematic diagram of the second base station provided in the embodiments of the present invention. As Figure 22 shown, the base station includes: a processor 2201, a memory 2202, and a transmitter 2203, where

[0951] The memory 2202 is used to store instructions;

[0952] The processor 2201 is used to execute the instructions stored in the memory 2202 to control the transmitter 2203 to send signals. When the processor 2201 executes the instructions stored in the memory 2202, this base station is used to complete the SRS configuration method provided by the embodiments of the present invention.

[0953] The processor 2201 is further used to receive and process the SRS sent by the terminal according to the configuration information. The configuration information includes the information predefined in the base station and / or the configuration information sent by the base station to the terminal described in the SRS configuration method.

[0954] For other optional implementation manners of this base station, reference may be made to the foregoing base station 501, which will not be elaborated herein.

[0955] Figure 23 It is a schematic structural diagram of the first terminal provided by the embodiments of the present invention. As Figure 23 shown, this terminal includes:

[0956] A transceiver module 2301, configured to receive the configuration information of the SRS subframe sent by the base station in the current cell where this terminal is located;

[0957] A processing module 2302, configured to determine the configuration of the SRS subframe according to the configuration information received by the transceiver module 2301;

[0958] The transceiver module 2301 is further configured to: send SRS on the SRS subframe according to the configuration of the SRS subframe determined by the processing module 2302;

[0959] Wherein, the SRS subframe is an uplink subframe or a subframe in which the number of uplink symbols is not less than the number of downlink symbols;

[0960] And all uplink symbols in the SRS subframe can be used to carry SRS.

[0961] For other optional implementation manners of this terminal, reference may be made to the terminal 502 in the wireless communication system provided by the embodiments of the present invention, which will not be elaborated herein.

[0962] Figure 24 It is a schematic structural diagram of the second terminal provided by the embodiments of the present invention. As Figure 24 shown, this terminal includes: a processor 2401, a memory 2402 and a transceiver 2403,

[0963] The memory 2402 is used to store instructions;

[0964] The processor 2401 is used to execute the instructions stored in the memory 2402 to control the transceiver 2403 to send and receive signals. When the processor 2401 executes the instructions stored in the memory 2402, this terminal is used to complete the SRS transmission method provided by the embodiments of the present invention.

[0965] For other optional implementation manners of the terminal, reference may be made to the aforementioned terminal 502, which will not be elaborated herein.

[0966] In summary, compared with the situation in the current LTE system where SRS is only transmitted in the last symbol of the uplink subframe or in the UpPTS of the special subframe, there are more transmission resources available for transmitting SRS in the embodiments of the present invention.

[0967] On the one hand, as the base station antenna array increases or the number of terminal antennas or the number of terminals increases, the current LTE system provides relatively few resources available for carrying SRS resources. By adopting the solution provided by the embodiments of the present invention, the current LTE system's demand for resources for carrying SRS resources can be met.

[0968] On the other hand, the solution provided by the embodiments of the present invention can also meet the transmission requirements of short-delay systems, millimeter-wave systems, etc., so as to achieve accurate uplink channel quality measurement and channel estimation.

[0969] Moreover, since an SRS subframe is configured separately, all uplink symbols in the SRS subframe can be used to carry SRS. Then, according to the number of terminals in the current system and the requirements of channel measurement and estimation, the resources for carrying SRS can be flexibly configured, achieving greater flexibility.

[0970] In addition, when SRS is multiplexed with channels such as PUSCH and Physical Uplink Control Channel (PUCCH), as Figure 4 shown in the multiplexing of SRS and PUSCH channels. To avoid conflicts between SRS and these channels, complex collision mechanisms are usually introduced, such as discarding SRS or discarding / puncturing certain channels, which reduces the transmission performance of the channels; if a shortened format of PUCCH, etc. is used, a complex judgment mechanism also needs to be introduced.

[0971] Optionally, by adopting the solution provided by the embodiments of the present invention, since there are relatively sufficient resources for carrying SRS, SRS does not need to be multiplexed with channels such as PUSCH and PUCCH. Therefore, complex collision mechanisms can be avoided, and certain channels do not need to be punctured or discarded, or SRS does not need to be discarded, thus ensuring the transmission performance of the channels.

[0972] In summary, in the embodiments of the present invention, a dedicated SRS subframe is provided, and SRS is transmitted within the dedicated SRS subframe, which not only improves the coverage of SRS but also avoids conflicts with other channels, reducing the implementation complexity. In addition, since more transmission resources are provided, the ability to support multiple antennas can also be improved.

[0973] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) that contain computer-usable program code.

[0974] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices produce a device for realizing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0975] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device that realizes the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0976] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for realizing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0977] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0978] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A method for configuring sounding reference signal (SRS), characterized in that, including: The base station sends configuration information of the SRS to the terminal, instructing the terminal to send the SRS according to the received configuration information; wherein, the configuration information includes: slot-level configuration information, the slot-level configuration information indicating the SRS slot, the starting position of SRS transmission in this SRS slot, and the number of symbols N of SRS transmission in this SRS slot.

2. The method according to claim 1, characterized in that, The configuration information instructs the terminal to transmit the SRS on N consecutive symbols starting from the starting position in the SRS slot.

3. The method according to claim 1, characterized in that, The starting position wherein represents the total number of symbols in a time slot.

4. The method according to claim 1, characterized in that, The configuration information further includes: information indicating a starting subcarrier of the SRS in a PRB, the starting subcarrier where n comb represents the number of subcarriers spaced between subcarriers occupied by the SRS.

5. The method according to claim 1, characterized in that, The position of the SRS time slot in a radio frame is determined according to the time slot level configuration information, the frame number of the radio frame, the period of the SRS in the time domain and the offset of the SRS in the time domain ; The configuration information further includes: information for indicating the value and information for indicating the value.

6. The method according to claim 5, characterized in that, The information for indicating the value and the information for indicating the value are carried in one information field.

7. The method according to claim 5, characterized in that, The SRS slot is located in a first subframe, and the position of the first subframe in a radio frame satisfies the following formula: where n s,f is the number of time slots included in a radio frame, n f is the frame number of the radio frame, is the period of the SRS in the time domain, is the offset of the SRS in the time domain, and, is the position of the first subframe in a radio frame.

8. The method according to any one of claims 1 to 7, characterized in that, The manner in which the SRS occupied by the terminal on each symbol of the SRS slot occupies frequency-domain resources is one of the following manners: The SRS occupied by the terminal on each symbol of the SRS slot occupies the same frequency-domain resources; The SRS occupied by the terminal on each slot of the SRS slot occupies different frequency-domain resources; The SRS occupied by the terminal on each symbol of the SRS slot occupies different frequency-domain resources; The configuration information further includes: indication information for indicating the manner in which the SRS occupied by the terminal on each symbol of the SRS slot occupies frequency-domain resources; or The manner in which the SRS occupied by the terminal on each symbol of the SRS slot occupies frequency-domain resources is predefined.

9. The method according to claim 8, characterized in that, If the manner in which the SRS occupied by the terminal on each symbol of the SRS slot is: the SRS occupied by the terminal on each symbol of the SRS slot occupies the same frequency-domain resources, then The base station sends at least one of the following information to the terminal for determining the frequency-domain resources occupied by the SRS on each symbol of the SRS subframe: Cell public bandwidth information C SRS , used to indicate the bandwidth occupied by the terminal for sending SRS; The terminal-specific bandwidth information B of the terminal SRS , which is used to indicate the bandwidth occupied by the terminal for transmitting SRS under the bandwidth indicated by SRS the cell common bandwidth information C The frequency-domain starting position information n of the terminal RRC , which is used to indicate the frequency-domain starting position of the bandwidth occupied by the terminal for transmitting SRS.

10. The method according to claim 1, characterized in that, The terminal transmits SRS using a single antenna; for each PRB in each symbol occupied by the SRS transmitted by the terminal, the terminal occupies non - consecutive sub - carriers in the PRB of the symbol, and the occupied sub - carriers are spaced n comb sub - carriers apart; or The terminal transmits SRS using multiple antennas; for each PRB in a symbol occupied by the SRS transmitted by the terminal, the terminal occupies non - consecutive sub - carriers in the PRB of the symbol, and for one antenna used by the terminal, the sub - carriers occupied by the SRS transmitted through this antenna are spaced n comb sub - carriers apart; The configuration information further includes: information for indicating the n comb value.

11. The method according to claim 10, characterized in that, n comb The value is 1 or 3.

12. The method according to claim 1, characterized in that, If the terminal uses multiple antennas to send the SRS, then The cyclic shift of the SRS sequence of the SRS transmitted by the terminal on the antenna with serial number satisfies the formula ​ Among them, N ap is the number of antennas used by the terminal to transmit SRS, is a parameter for determining the cyclic shift of the SRS sequence of the SRS transmitted by the terminal on each antenna, The configuration information further includes: information for indicating the value; or the value of the terminal is predefined.

13. The method according to claim 1, characterized in that, The SRSs sent by the terminal using multiple antennas on different antennas occupy different symbols.

14. A base station, characterized in that, including a processor and a memory, the memory is used for storing instructions; the processor is used for executing the instructions stored in the memory, and when the processor executes the instructions stored in the memory, the base station is caused to complete the method according to any one of claims 1 to 13.

15. A method for transmitting a sounding reference signal (SRS), characterized in that, including: The terminal receives the configuration information of the SRS from the base station; wherein, the configuration information includes: slot-level configuration information, the slot-level configuration information indicating the SRS slot, the starting position of SRS transmission in this SRS slot, and the number of symbols N of SRS transmission in this SRS slot; The terminal sends the SRS on the SRS slot according to the received configuration information.

16. The method according to claim 15, characterized in that, The terminal transmits the SRS on N consecutive symbols starting from the starting position in the SRS slot.

17. The method according to claim 15, characterized in that, The starting position wherein represents the total number of symbols in a time slot.

18. The method according to claim 15, characterized in that, The configuration information further includes: information indicating a starting subcarrier of the SRS in a PRB, and the starting subcarrier the n comb represents the number of subcarriers between subcarriers transmitting the SRS.

19. The method according to claim 15, characterized in that, The position of the SRS time slot in a radio frame is determined according to the time slot level configuration information, the frame number of the radio frame, the period of the SRS in the time domain and the offset of the SRS in the time domain ; The configuration information further includes: information for indicating the value of the and information for indicating the value of the ; or The position of the SRS subframe in a radio frame is predefined; the method further includes: the terminal sending the SRS at the predefined position.

20. The method according to claim 19, characterized in that, The information for indicating the value and the information for indicating the value are carried in an information field.

21. The method according to claim 19, characterized in that, The SRS slot is located in a first subframe, and the position of the first subframe in a radio frame satisfies the following formula: where n s,f is the number of time slots included in a radio frame, n f is the frame number of the radio frame, is the period of the SRS in the time domain, is the offset of the SRS in the time domain, and, is the position of the first subframe in a radio frame.

22. The method according to any one of claims 15 to 21, characterized in that, The manner in which the SRS occupied by the terminal on each symbol of the SRS slot occupies frequency-domain resources is one of the following manners: The frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS time slot are the same; The frequency-domain resources occupied by the SRS transmitted by the terminal on each time slot of the SRS time slot are different; The frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS time slot are different; The configuration information further includes: indication information for indicating the manner of the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS time slot; Or The manner of the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS time slot is pre-defined.

23. The method according to claim 22, characterized in that, If the manner of the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS time slot is: the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS time slot are the same, then The configuration information further includes at least one of the following information: Cell public bandwidth information C SRS , used to indicate the bandwidth occupied by the terminal for sending SRS; The terminal-specific bandwidth information B of the terminal SRS , which is used to indicate that under the bandwidth indicated by the cell common information C SRS , the bandwidth occupied by the terminal for transmitting SRS; The frequency-domain starting position information n of the terminal RRC , which is used to indicate the frequency-domain starting position of the bandwidth occupied by the terminal for transmitting SRS.

24. The method according to claim 15, wherein, The terminal transmits SRS using a single antenna; The configuration information further includes: information for indicating an n comb value; the method further includes: for each PRB in each symbol occupied by the SRS sent by the terminal, the terminal determines non-consecutive subcarriers in the PRB occupying the symbol, and the occupied subcarriers are spaced apart by n comb subcarriers; The terminal transmits SRS using multiple antennas; the configuration information further includes: information for indicating the value of n comb where the n comb represents the number of subcarriers between the subcarriers for transmitting SRS; the method further includes: for each PRB in a symbol occupied by the SRS transmitted by the terminal, the terminal determines the discontinuous subcarriers in the PRB occupying the symbol, and for one antenna used by the terminal, the subcarriers occupied by the SRS transmitted through the antenna are spaced by n comb subcarriers.

25. The method according to claim 24, wherein, n comb The value is 1 or 3.

26. The method according to claim 15, wherein, The terminal transmits SRS using multiple antennas; The configuration information further includes: information for indicating the value of a parameter ; or the value of a parameter of the terminal is predefined, and the is a parameter for determining the cyclic shift of the SRS sequence of the SRS transmitted by the terminal on each antenna; The terminal transmits SRS on the SRS time slot according to the received configuration information, including: The terminal determines the cyclic shift of the SRS sequence of the SRS transmitted on the antenna with the serial number according to the following formula Among them, N ap is the number of antennas used by the terminal to send SRS, 27. The method according to claim 15, wherein, For a terminal transmitting SRS using multiple antennas, the SRSs transmitted on different antennas occupy different symbols.

28. A terminal, wherein, Including a processor, a memory, and a transceiver, The memory is used for storing instructions; The processor is used for executing the instructions stored in the memory to control the transceiver to perform signal transmission and reception. When the processor executes the instructions stored in the memory, the terminal is used to complete the method according to any one of claims 15 to 27.

29. A communication device, wherein, Including a processor and a memory, The memory is used for storing instructions; The processor is used for executing the instructions stored in the memory to enable the communication device to complete the method according to any one of claims 1 to 13 or 15 to 27.

30. A readable storage medium, wherein, For storing instructions, when the instructions are executed by a processor, the method according to any one of claims 1 to 13 or 15 to 27 is implemented.

31. A method for configuring a sounding reference signal (SRS), wherein, Including: The base station sends configuration information of an SRS subframe to a terminal in the current cell, instructing the terminal to transmit SRS on the SRS subframe according to the received configuration information; Wherein, the SRS subframe is an uplink subframe, or a subframe in which the number of uplink symbols is not less than the number of downlink symbols; And all uplink symbols in the SRS subframe can be used to carry SRS; Receiving the SRS transmitted by the terminal on the SRS subframe, and the SRS is not multiplexed with a physical uplink shared channel or a physical uplink control channel.

32. The method according to claim 31, wherein, The position of the SRS subframe in a radio frame is determined according to the frame number of the radio frame, the period of the SRS subframe of the current cell and the SRS subframe offset parameter ; The configuration information includes: information for indicating the value of the and information for indicating the value of the ; or The position of the SRS subframe in a radio frame is pre-defined.

33. The method according to claim 31 or 32, characterized in that, The position of the SRS subframe that can be occupied by the terminal to send SRS in a radio frame is determined according to the frame number of the radio frame, the period of the SRS subframe of the terminal and the SRS subframe offset of the terminal ; The configuration information includes: Information for indicating the value of the terminal; and Information for indicating the SRS subframe offset of the terminal value.

34. The method according to claim 31 or 32, characterized in that, The symbol transmission manner of the terminal on the SRS subframe includes one of the following manners: The terminal transmits SRS on all symbols of the SRS subframe; or The terminal transmits SRS on adjacent multiple symbols of the SRS subframe; Or The terminal transmits SRS on each symbol whose mutual interval is a specified number of symbols on the SRS subframe; The configuration information further includes: indication information for indicating the symbol transmission manner of the terminal on the SRS subframe; Or The symbol transmission mode of the terminal on the SRS subframe is predefined.

35. The method according to claim 31, characterized in that, The frequency-domain resource mode occupied by the SRS sent by the terminal on each symbol of the SRS subframe is one of the following modes: The frequency-domain resources occupied by the SRS sent by the terminal on each symbol of the SRS subframe are the same; The frequency-domain resources occupied by the SRS sent by the terminal on each time slot of the SRS subframe are different; The frequency-domain resources occupied by the SRS sent by the terminal on each symbol of the SRS subframe are different; The configuration information further includes: indication information for indicating the frequency-domain resource mode occupied by the SRS sent by the terminal on each symbol of the SRS subframe; Or The frequency-domain resource mode occupied by the SRS sent by the terminal on each symbol of the SRS subframe is predefined.

36. The method according to claim 35, characterized in that, If the frequency-domain resource mode occupied by the SRS sent by the terminal on each symbol of the SRS subframe is: the frequency-domain resources occupied by the SRS sent by the terminal on each symbol of the SRS subframe are the same, then The frequency-domain resources occupied by the SRS sent by the terminal on each symbol of the SRS subframe are determined according to the following information, and at least one of the following information is sent by the base station to the terminal: Cell common bandwidth information C SRS , which is used to indicate the bandwidth occupied by the terminal in the current cell for transmitting SRS; The terminal-specific bandwidth information B of the terminal SRS , which is used to indicate that under the bandwidth indicated by the cell common bandwidth information C SRS , the bandwidth occupied by the terminal for transmitting SRS; The frequency domain starting position information n of the terminal RRC , which is used to indicate the frequency domain starting position of the bandwidth occupied by the terminal for transmitting SRS.

37. The method according to claim 35, characterized in that, If the frequency-domain resource mode occupied by the SRS sent by the terminal on each symbol of the SRS subframe is that the frequency-domain resources occupied by the SRS sent by the terminal on different symbols of the SRS subframe are different, then The frequency-domain resources occupied by the SRS sent by the terminal on the symbol with serial number l of the SRS subframe are determined according to the following information: Cell public bandwidth information C SRS , which is used to indicate the bandwidth occupied by the terminals in the current cell for sending SRS; The same terminal-specific bandwidth information B on each symbol used by the terminal for transmitting SRS SRS , which is used to indicate that under the bandwidth indicated by the cell common information C SRS , the same bandwidth occupied by the terminal for transmitting SRS on each symbol used by the terminal for transmitting SRS; The frequency-domain starting position information of the terminal on the symbol with serial number l It is used to indicate the frequency-domain starting position of the bandwidth occupied by the SRS transmitted by the terminal on the symbol with serial number l in the SRS subframe.

38. The method according to claim 37, characterized in that, The configuration information further includes at least one of the following information: The cell public bandwidth information C SRS ; The same terminal-specific bandwidth information B on each symbol used by the terminal to transmit SRS SRS ; Frequency domain starting position information of the terminal on the symbol with serial number l 39. The method according to claim 35, characterized in that, The terminal transmits SRS using a single antenna; for each PRB in each symbol occupied by the SRS transmitted by the terminal, the terminal occupies non - consecutive sub - carriers in the PRB of the symbol, and the occupied sub - carriers are spaced n comb sub - carriers apart; or The terminal transmits SRS using multiple antennas; for each PRB in a symbol occupied by the SRS transmitted by the terminal, the terminal occupies non - consecutive sub - carriers in the PRB of the symbol, and for one antenna used by the terminal, the sub - carriers occupied by the SRS transmitted through this antenna are spaced n comb sub - carriers apart; The configuration information further includes: information for indicating the n comb value.

40. The method according to claim 39, characterized in that, The way of the comb subcarriers occupied by the SRS sent by the terminal on each symbol of the SRS subframe is one of the following ways: For different symbols occupied by the SRS sent by the terminal, the terminal occupies the same comb subcarriers in the symbols; or For symbols of the SRS sent by the terminal that are in different time slots, the terminal occupies different comb subcarriers in the symbols; Or For different symbols occupied by the SRS sent by the terminal, the terminal occupies different comb subcarriers in the symbols; The configuration information further includes: indication information for indicating the way of the comb subcarriers occupied by the SRS sent by the terminal on each symbol of the SRS subframe; Or The way of the comb subcarriers occupied by the SRS sent by the terminal on each symbol of the SRS subframe is predefined.

41. The method according to claim 31, characterized in that, If the terminal sends SRS using multiple antennas, then The cyclic shift of the SRS sequence of the SRS transmitted by the terminal on the antenna with serial number satisfies the formula and Among them, N ap is the number of antennas used by the terminal to transmit SRS, is a parameter for determining the cyclic shift of the SRS sequence of the SRS transmitted by the terminal on each antenna, The configuration information further includes: information for indicating the value; or the value of the terminal is predefined.

42. The method according to claim 31, characterized in that, Terminals that send SRS using multiple antennas in the current cell send SRS on different antennas occupying different symbols.

43. A base station, characterized in that, It includes a processor and a memory, The memory is used to store instructions; The processor is used to execute the instructions stored in the memory. When the processor executes the instructions stored in the memory, the base station is used to complete the method according to any one of claims 31 to 42.

44. A method for transmitting a sounding reference signal SRS, characterized in that, It includes: The terminal receives the configuration information of the SRS subframe sent by the base station in the current cell where the terminal is located; The terminal determines the configuration of the SRS subframe according to the received configuration information; The terminal transmits SRS on the SRS subframe according to the determined configuration of the SRS subframe; Wherein, the SRS subframe is an uplink subframe or a subframe in which the number of uplink symbols is not less than the number of downlink symbols; And all uplink symbols in the SRS subframe can be used to carry SRS; The terminal transmits SRS on the SRS subframe, and the SRS is not multiplexed with a physical uplink shared channel or a physical uplink control channel.

45. The method according to claim 44, characterized in that, The configuration information includes: information indicating the period of the SRS subframe of the current cell and information indicating the value of the SRS subframe offset ; the terminal determines the configuration of the SRS subframe according to the received configuration information, including: the terminal determines the period of the SRS subframe of the current cell according to the received information indicating the value of the period of the SRS subframe ; the terminal determines the offset of the SRS subframe according to the information indicating the value of the SRS subframe offset ; the terminal determines the position of the SRS subframe in the radio frame according to the frame number of the radio frame, the and the ; or and the determines the position of the SRS subframe in the radio frame; or The position of the SRS subframe in a radio frame is predefined; the terminal transmits SRS on the SRS subframe, including: the terminal transmits SRS at the predefined position.

46. The method according to claim 44 or 45, characterized in that, The configuration information further includes: Information for indicating that of the terminal value; Information for indicating the SRS subframe offset of the terminal value; The terminal determines the configuration of the SRS subframe according to the received configuration information, including: The terminal determines the position of the SRS subframe available for transmitting SRS in the radio frame according to the frame number of the radio frame, the period of the SRS subframe of the terminal and the SRS subframe offset of the terminal ​ 47. The method according to claim 44 or 45, wherein, The symbol transmission mode of the terminal on the SRS subframe includes one of the following modes: The terminal transmits SRS on all symbols of the SRS subframe; or The terminal transmits SRS on multiple adjacent symbols of the SRS subframe; Or The terminal transmits SRS on symbols that are spaced apart by a specified number of symbols from each other on the SRS subframe; The configuration information further includes indication information for indicating the symbol transmission mode of the terminal on the SRS subframe; Or The symbol transmission mode of the terminal on the SRS subframe is predefined.

48. The method according to claim 44, wherein, The frequency-domain resource mode occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe is one of the following modes: The frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are the same; The frequency-domain resources occupied by the SRS transmitted by the terminal on each time slot of the SRS subframe are different; The frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are different; The configuration information further includes indication information for indicating the frequency-domain resource mode occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe; Or The frequency-domain resource mode occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe is predefined.

49. The method according to claim 48, wherein, If the frequency-domain resource mode occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe is: the frequency-domain resources occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe are the same, then The configuration information further includes at least one of the following information: Cell common bandwidth information C SRS , which is used to indicate the bandwidth occupied by the terminal in the current cell for sending SRS; The terminal-specific bandwidth information B of the terminal SRS , which is used to indicate that under the bandwidth indicated by the cell common information C SRS , the bandwidth occupied by the terminal for transmitting SRS; The frequency-domain starting position information n of the terminal RRC , which is used to indicate the frequency-domain starting position of the bandwidth occupied by the terminal for transmitting SRS.

50. The method according to claim 48, wherein, If the terminal determines that the frequency-domain resource mode occupied by the SRS transmitted by the terminal on each symbol of the SRS subframe is: the frequency-domain resources occupied by the SRS transmitted by the terminal on different symbols of the SRS subframe are different, then The configuration information further includes at least one of the following information: Cell public bandwidth information C SRS , which is used to indicate the bandwidth occupied by the terminal in the current cell when transmitting SRS; The terminal-specific bandwidth information of the terminal on the symbol with serial number l Used to indicate that under the bandwidth indicated by the cell common bandwidth information C SRS The bandwidth occupied by the terminal to transmit SRS on the symbol with serial number l; Frequency domain start position information of the terminal on the symbol with sequence number l Used to indicate the frequency domain start position of the bandwidth occupied by the SRS transmitted by the terminal on the symbol with sequence number l in the SRS subframe.

51. The method according to claim 50, wherein, The terminal determines the configuration of the SRS subframe according to the received configuration information, including: The terminal determines the frequency-domain resources occupied by the SRS transmitted on the symbol with serial number l in the SRS subframe according to the following information, and at least one of the following information is obtained by the terminal from the configuration message sent by the base station: Community public bandwidth information C SRS ; Terminal-specific bandwidth information of the terminal on the symbol with serial number l Frequency domain starting position information of the terminal on the symbol with serial number l 52. The method according to claim 48, wherein The terminal transmits SRS using a single antenna; The configuration information further includes: information for indicating an n comb value; based on the received configuration information, the terminal determines the configuration of the SRS subframe, including: for each PRB in each symbol occupied by the SRS transmitted by the terminal, the terminal determines non-consecutive subcarriers in the PRB occupying the symbol, and the occupied subcarriers are spaced apart by n comb - 35 subcarriers; The terminal transmits SRS using multiple antennas; the configuration information further includes: information for indicating the n comb value; based on the received configuration information, the terminal determines the configuration of the SRS subframe, including: for each PRB in a symbol occupied by the SRS transmitted by the terminal, the terminal determines non-consecutive subcarriers in the PRB occupying the symbol, and for one antenna used by the terminal, the subcarriers occupied by the SRS transmitted through this antenna are spaced n comb subcarriers apart.

53. The method according to claim 52, wherein The manner in which the SRS transmitted by the terminal on each symbol of the SRS subframe occupies the comb subcarriers is one of the following manners: For different symbols occupied by the SRS transmitted by the terminal, the terminal occupies the same comb subcarriers in the symbols; or For symbols occupied by the SRS transmitted by the terminal that are in different time slots, the terminal occupies different comb subcarriers in the symbols; Or For different symbols occupied by the SRS transmitted by the terminal, the terminal occupies different comb subcarriers in the symbols; The configuration information further includes: indication information for indicating the manner in which the SRS transmitted by the terminal on each symbol of the SRS subframe occupies the comb subcarriers; Or The manner in which the SRS transmitted by the terminal on each symbol of the SRS subframe occupies the comb subcarriers is predefined.

54. The method according to claim 44, wherein The terminal uses multiple antennas to transmit SRS; The configuration information further includes: information for indicating the value of a parameter ; or the value of a parameter of the terminal is predefined, and the is a parameter for determining a cyclic shift of an SRS sequence of SRSs transmitted by the terminal on each antenna The terminal determines the configuration of the SRS subframe according to the received configuration information, including: The terminal determines the cyclic shift of the SRS sequence of the SRS transmitted on the antenna with the serial number according to the following formula Among them, N ap is the number of antennas used by the terminal to send SRS, 55. The method according to claim 44, wherein For terminals that use multiple antennas to transmit SRS in the current cell, the SRSs transmitted on different antennas occupy different symbols.

56. A terminal, wherein Comprising a processor, a memory, and a transceiver, The memory is used to store instructions; The processor is used to execute the instructions stored in the memory to control the transceiver to perform signal transmission and reception. When the processor executes the instructions stored in the memory, the terminal is used to complete the method according to any one of claims 44 to 55.

57. A communication device, wherein Comprising a processor, The processor is used to execute the instructions stored in the memory to enable the communication device to complete the method according to any one of claims 31 to 42 or 44 to 55.

58. A readable storage medium, wherein For storing instructions, when the instructions are executed by a processor, the method according to any one of claims 31 to 42 or 44 to 55 is implemented.

59. A computer program product, wherein Comprising computer-executable instructions, when the computer-executable instructions are run by a processor, the method according to any one of claims 1 to 13 or 15 to 27 or 31 to 42 or 44 to 55 is implemented.

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