CN111865543B - A signal transmission method and device - Google Patents

Abstract

An embodiment of the present application provides a signal transmission method and device, wherein the method includes: a terminal device acquires first configuration information and second configuration information; the first configuration information is used to indicate the frequency hopping bandwidth configuration of a Sounding Reference Signal (SRS) ; The second configuration information is used to indicate the terminal device level SRS bandwidth configuration; when the terminal device determines to transmit the first SRS by frequency hopping according to the first configuration information and the second configuration information, when transmitting the first SRS During the SRS process, the antenna for sending the first SRS is switched every time frequency hopping is used to detect the entire cell-level SRS bandwidth.

Description

A signal transmission method and device

technical field

The present application relates to the field of wireless transmission, and in particular to a signal transmission method and device.

Background technique

The wireless channel has the characteristic of frequency selective fading, which seriously reduces the transmission performance of the uplink. In order to determine the transmission performance of the uplink, the base station estimates the uplink channel quality of different frequency bands through the sounding reference signal (Sounding Reference Signal, SRS) sent by the terminal equipment. The scheduler on the base station side can allocate resource blocks (Resource Block, RB) with good instantaneous channel state to the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) of the terminal device according to the detected channel state information (Channel State Information, CSI). ) transmission to obtain frequency selectivity gain to guarantee uplink performance.

In order to reduce the interference of the SRS during transmission, the terminal device may transmit the SRS in a frequency hopping manner when transmitting the SRS. At present, each time a terminal device hops to transmit SRS, it will switch antennas at the same time. Therefore, the terminal device needs to switch antennas frequently. For example, as shown in Figure 1, when the SRS transmission count n _SRS is equal to 0, the terminal device's Antenna Tx0 transmits SRS at one carrier frequency. When n _SRS is equal to 1, it needs to hop to another carrier frequency to continue transmitting SRS. During this frequency hopping process, it is necessary to simultaneously switch the antenna Tx0 through which the terminal equipment transmits the SRS to the antenna Tx1, and each frequency hopping requires a time guard interval for preparing for antenna switching. During the process of increasing n _SRS from 1 to 9, the antenna for transmitting SRS of the terminal device will also switch between Tx0-Tx3. The specific process is similar to the switching from Tx0 to Tx1, and will not be repeated here. Therefore, in the transmission process of SRS, since frequency hopping and antenna switching are carried out simultaneously, the time guard interval for preparing for antenna switching is relatively large, resulting in a long time-consuming transmission process of SRS and low transmission efficiency of SRS, thus The entire transmission process of SRS cannot meet the requirements of low latency and high reliability.

Therefore, in the prior art, during the SRS transmission process, antenna switching is frequent and time guard intervals are large, resulting in a long time for the entire SRS transmission process and low SRS transmission efficiency, which is an urgent problem to be solved.

Contents of the invention

The embodiments of the present application provide a signal transmission method and device, which are used to solve the problem in the prior art that the SRS transmission efficiency is low due to frequent antenna switching during the SRS transmission process.

In the first aspect, the embodiment of the present application provides a signal transmission method, the method includes: a terminal device acquires first configuration information and second configuration information; the first configuration information is used to indicate the frequency hopping bandwidth configuration of the SRS; the The second configuration information is used to indicate the SRS bandwidth configuration at the terminal device level; when the terminal device determines to transmit the first SRS by frequency hopping according to the first configuration information and the second configuration information, in the process of transmitting the first SRS In this method, the antenna for sending the first SRS is switched every time frequency hopping is used to detect the entire cell-level SRS bandwidth.

In this embodiment of the present application, after the terminal device acquires the first configuration information used to indicate the SRS frequency hopping bandwidth configuration and the second configuration information used to indicate the SRS bandwidth, the terminal device determines according to the first configuration information and the second configuration information When transmitting the first SRS by frequency hopping, in the process of transmitting the first SRS, after the entire bandwidth allocated to the terminal device is frequency-hopped and transmitted, the first SRS is switched once antenna, thus reducing the number of times terminal equipment switches antennas.

In a possible implementation manner, the switching the antenna for sending the first SRS every time the frequency hopping transmission is performed in the entire bandwidth allocated to the terminal device includes: frequency hopping in the entire bandwidth allocated to the terminal device Transmit X*R SRS symbols, and switch the antenna for sending the first SRS once; X is the minimum number of SRS symbols required when using the first SRS to detect the entire cell-level SRS bandwidth by frequency hopping ; R is the SRS symbol repetition factor.

个SRS符号，所述终端设备根据所述第一参数确定所述第

个SRS符号的天线端口索引；

为自然数。In a possible implementation manner, the method further includes: the terminal device acquires third configuration information and fourth configuration information; the third configuration information is used to indicate the number of sounding reference signal SRS symbols transmitted in a subframe ; The fourth configuration information is used to indicate the SRS symbol repetition factor; The terminal device determines a first parameter according to the third configuration information and the fourth configuration information; The first parameter for the first SRS

SRS symbols, the terminal device determines the first parameter according to the first parameter

Antenna port index of SRS symbols;

is a natural number.

个SRS符号，所述终端设备通过第一天线，传输所述第

个SRS符号；所述第一天线为所述第

个SRS符号的天线端口索引对应的天线。In a possible implementation manner, the method further includes: for the first

SRS symbols, the terminal equipment transmits the first antenna through the first

SRS symbols; the first antenna is the first

The antenna corresponding to the antenna port index of each SRS symbol.

In a possible implementation manner, the method further includes: the terminal device receiving first indication information from the network device; the first indication information is used to indicate whether the first parameter counts continuously; when the When the first indication information indicates that the first parameter counts continuously, when the terminal device transmits the first SRS in the first subframe, the terminal device determines according to the third configuration information and the fourth configuration information The first parameter, including:

The terminal device determines the first parameter according to the following formula:

λ为根据所述终端设备当前所使用的天线模式确定的参数，R表示所述第四配置信息，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

为所述第三配置信息，

表示向下取整运算，Δ表示所述终端设备在第二子帧中发送第二SRS的最后一个符号时，所述第一参数的取值，所述第二子帧为所述终端设备在发送所述第一子帧之前发送的最后一个子帧。Wherein, n _{SRS_AS} is the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device, R represents the fourth configuration information,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

For the third configuration information,

Indicates the rounding down operation, Δ indicates the value of the first parameter when the terminal device sends the last symbol of the second SRS in the second subframe, and the second subframe is the value of the terminal device in the second subframe The last subframe sent before the first subframe is sent.

In a possible implementation manner, the terminal device determines the first parameter according to the third configuration information and the fourth configuration information, including:

The terminal device determines the first parameter according to the following formula:

λ为根据所述终端设备当前所使用的天线模式确定的参数，R表示所述第四配置信息，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

为所述第三配置信息，

表示向下取整运算。Wherein, n _{SRS_AS} is the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device, R represents the fourth configuration information,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

For the third configuration information,

Indicates the rounding down operation.

In a possible implementation manner, the method further includes: when the antenna mode currently used by the terminal device is 1T4R, λ=4; or, when the antenna mode currently used by the terminal device is 2T4R or 1T2R , λ=2.

个符号，根据以下方式确定所述第

个符号的天线索引：In a possible implementation manner, the method further includes: the terminal device receiving a sixth parameter; the sixth parameter is used to indicate the antenna mode supported by the terminal device; if the sixth parameter indicates The antenna mode is 1T4R, and when the terminal device uses frequency hopping to transmit the first SRS, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna indices of symbols:

个符号的天线索引，n_{SRS_AS}为所述第五参数；K为由所述第一配置信息和第二配置信息获得，K为正整数；β为预设值；Among them, a(n _{SRS_AS} ) represents the first

The antenna index of symbols, n _{SRS_AS} is the fifth parameter; K is obtained from the first configuration information and the second configuration information, K is a positive integer; β is a preset value;

个符号，根据以下方式确定所述第

个符号的天线索引：Or, if the antenna mode indicated by the sixth parameter is 1T4R, and when the terminal device does not transmit the SRS by frequency hopping, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna indices of symbols:

a(n _{SRS_AS} )=n _{SRS_AS} mod 4

个符号的天线索引，n_{SRS_AS}为所述第五参数。Among them, a(n _{SRS_AS} ) represents the first

The antenna index of symbols, n _{SRS_AS} is the fifth parameter.

个符号，根据以下方式确定所述第

个符号的天线索引：In a possible implementation manner, the method further includes: if the antenna mode indicated by the sixth parameter is 2T4R, and when the terminal device transmits the first SRS in a frequency hopping manner, for the The first of the SRS

symbol, according to the following way to determine the first

Antenna indices of symbols:

个符号的天线索引，Λ表示终端设备用于传输所述第一 SRS的天线对数，n_{SRS_AS}为所述第五参数； K为频域上分成的份数由所述第一配置信息和第二配置信息获得，K为正整数；β为预设值；Among them, a(n _{SRS_AS} ) represents the first

The antenna index of symbols, Λ represents the number of antenna pairs used by the terminal device to transmit the first SRS, n _{SRS_AS} is the fifth parameter; K is the number of shares divided in the frequency domain by the first configuration information and the second SRS 2. Obtaining configuration information, K is a positive integer; β is a preset value;

个符号，根据以下方式确定所述第

个符号的天线索引：Or, if the antenna mode indicated by the sixth parameter is 2T4R, and when the terminal device does not transmit the SRS by frequency hopping, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna indices of symbols:

a(n _{SRS_AS} )=n _{SRS_AS} mod Λ

个符号的天线索引，n_{SRS_AS}为所述第五参数，Λ表示终端设备用于传输所述第一SRS的天线对数。Among them, a(n _{SRS_AS} ) represents the first

The antenna index of symbols, n _{SRS_AS} is the fifth parameter, and Λ represents the number of antenna pairs used by the terminal device to transmit the first SRS.

个符号，根据以下方式确定所述第

个符号的天线索引：In a possible implementation manner, if the antenna mode indicated by the sixth parameter is 1T2R, and when the terminal device transmits the first SRS in a frequency hopping manner, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna indices of symbols:

个符号的天线索引；n_{SRS_AS}为所述第五参数；K为由所述第一配置信息和第二配置信息获得，K为正整数；β为预设值；Among them, a(n _{SRS_AS} ) represents the first

The antenna index of symbols; n _{SRS_AS} is the fifth parameter; K is obtained from the first configuration information and the second configuration information, and K is a positive integer; β is a preset value;

个符号，根据以下方式确定所述第

个符号的天线索引：Or, if the antenna mode indicated by the sixth parameter is 1T2R, and when the terminal device does not transmit the SRS by frequency hopping, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna indices of symbols:

a(n _{SRS_AS} )=n _{SRS_AS} mod 2

个符号的天线索引，n_{SRS_AS}为所述第五参数。Among them, a(n _{SRS_AS} ) represents the first

The antenna index of symbols, n _{SRS_AS} is the fifth parameter.

In a possible implementation manner, the method further includes: the terminal device acquires a seventh parameter, the seventh parameter is used to indicate that in a subframe, each protection of all SRS symbols included in the first SRS The number of interval GP symbols, the position of each GP symbol, and the length of each GP symbol; or, the terminal device acquires an eighth parameter, the eighth parameter is a bitmap, and each bit in the bitmap A symbol located in a subframe is uniquely corresponding; when the value of a bit in the bitmap is the first value, it indicates that the symbol corresponding to the bit is an SRS symbol.

In a possible implementation manner, the method further includes: when the value of a bit in the bitmap is the second value, indicating that the symbol corresponding to the bit is a GP symbol; or, the bitmap When the value of one bit in is the second value, it means that the symbol corresponding to this bit is not an SRS symbol.

In a possible implementation manner, the method further includes: the terminal device receiving a transmission power control TPC from the network device; when the first SRS is a traditional SRS, the terminal device determines according to the TPC The transmission power of the first SRS; or, when the first SRS is an additional SRS, the terminal device determines the transmission power of the first SRS according to the TPC; or, when the first SRS is a traditional When SRS or SRS is added, the terminal device determines the transmission power of the first SRS according to the TPC; the terminal device uses the transmission power to transmit the first SRS.

In a possible implementation manner, the method further includes: the terminal device determining a second SRS to be sent; if the first SRS symbol in the first SRS is the same as the second SRS symbol in the second SRS Adjacent, then only the first SRS is sent, or only the second SRS is sent; when the first SRS is a traditional SRS, the second SRS is an additional SRS; or, when the first SRS is When adding an SRS, the second SRS is a traditional SRS.

In the second aspect, the embodiment of the present application provides a signal transmission method, the method includes: the network device sends the first parameter and the second parameter to the terminal device; the first parameter is used to indicate the specific SRS hop of the terminal device frequency bandwidth configuration; the second parameter is used to indicate specific parameters of the terminal device; the network device receives the first SRS from the terminal device; When frequency hopping is used to transmit the first SRS, the antenna for sending the first SRS is switched every time frequency hopping is used to detect the entire cell-level SRS bandwidth.

In a possible implementation, the method includes:

The network device sends a transmission power control TPC to the terminal device; the TPC is used to indicate that at least one guard interval GP symbol is included between the first SRS and the second SRS to be sent by the terminal device; When the first SRS is a traditional SRS, the second SRS is an additional SRS; or, when the first SRS is an additional SRS, the second SRS is a traditional SRS.

In a possible implementation, the method further includes:

The network device sends a transmission power control TPC to the terminal device; the TPC is used to indicate: when the first SRS symbol of the first SRS is the same as the third SRS symbol in the third SRS to be sent by the terminal device When adjacent, the terminal device transmits the first SRS and the third SRS with the same bandwidth; when the first SRS is a traditional SRS, the third SRS is an additional SRS; or, when the When the first SRS is an additional SRS, the third SRS is a traditional SRS.

In a third aspect, an embodiment of the present application provides a signal transmission method, the method includes: a terminal device acquires first configuration information, second configuration information, fifth configuration information, and fourth configuration information of a first SRS, wherein the The first configuration information and the second configuration information are used to determine the configuration information of the first SRS to perform frequency hopping, the fifth configuration information is used to determine the configuration information of the first SRS to perform antenna switching, and the fourth configuration The information is used to indicate configuration information of time-domain symbols occupied by the first SRS; the terminal device, according to the first configuration information, the second configuration information, the fifth configuration information, and the fourth configuration information, When it is determined to send the first SRS, SRS frequency hopping is completed first, and then SRS antenna switching is performed.

In a possible implementation manner, the method further includes: the terminal device acquires third configuration information and eighth configuration information; the third configuration information is used to indicate that the time domain symbols occupied by the first SRS are normally The subframe includes at least one OFDM symbol other than the last OFDM symbol; the eighth configuration information is used to indicate the cell where the terminal device sends the first SRS; the first configuration information is used to indicate the SRS The frequency hopping bandwidth configuration, the second configuration information is used to indicate the terminal device level SRS bandwidth configuration; when the first configuration information is smaller than the second configuration information, the terminal device performs when sending the first SRS frequency hopping: when the fifth configuration information indicates that the terminal device enables antenna switching, the terminal device performs antenna switching when sending the first SRS.

In a possible implementation manner, the method further includes: the fourth configuration information is used to indicate the number of repetitions R for the terminal device to repeat when sending the SRS; the terminal device, according to the first configuration information, the The second configuration information, the third configuration information, the fourth configuration information and the fifth configuration information, when determining to send the first SRS, first complete SRS repetition, then complete SRS frequency hopping, and finally perform SRS Antenna switching.

个SRS符号上发送SRS所使用天线的天线端口索引，

为自然数。In a possible implementation manner, the method further includes: the terminal device determining a first parameter according to the third configuration information and the fourth configuration information; the terminal device determining a first parameter according to the first parameter on the

The antenna port index of the antenna used to transmit SRS on each SRS symbol,

is a natural number.

In a possible implementation manner, the method further includes: the terminal device receiving first indication information from the network device; the first indication information is used to indicate whether the first parameter counts continuously; when the When the first indication information indicates that the first parameter counts continuously, when the terminal device transmits the first SRS in the first subframe, the terminal device transmits the first SRS according to the third configuration information and the fourth configuration information to determine the first parameter, including:

The terminal device determines the first parameter according to the following formula:

λ为根据所述终端设备当前所使用的天线模式确定的参数，R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

为正常子帧内传输SRS所占用的OFDM符号总数量，

表示向下取整运算，Δ表示所述终端设备在第二子帧中发送第二SRS的最后一个符号时，所述第一参数的取值，所述第二子帧为所述终端设备在发送所述第一子帧之前发送的最后一个子帧。Wherein, n _{SRS_AS} is the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device, and R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

is the total number of OFDM symbols occupied by SRS transmission in a normal subframe,

Indicates the rounding down operation, Δ indicates the value of the first parameter when the terminal device sends the last symbol of the second SRS in the second subframe, and the second subframe is the value of the terminal device in the second subframe The last subframe sent before the first subframe is sent.

和所述R，确定第一参数，包括：In a possible implementation manner, the terminal device according to the

and the R, determine the first parameters, including:

The terminal device determines the first parameter according to the following formula:

λ为根据所述终端设备当前所使用的天线模式确定的参数，R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

为正常子帧内传输SRS所占用的OFDM符号总数量，

表示向下取整运算。Wherein, n _{SRS_AS} is the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device, and R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

is the total number of OFDM symbols occupied by SRS transmission in a normal subframe,

Indicates the rounding down operation.

其中，n_hop为所述第一跳频次数，m_SRS，0表示配置的SRS小区级带宽，

表示配置的SRS终端设备级带宽；或者，所述终端设备接收来自所述网络设备的第一跳频次数n_hop；或者，所述终端设备按照以下方式，根据所述第三配置信息、所述第四配置信息和所述第五配置信息，确定所述第一跳频次数：所述第一跳频次数

λ为由所述第五配置信息确定的参数：当所述第二配置信息指示1T4R天线切换使能时，λ＝4；当所述第二配置信息指示2T4R或1T2R天线切换使能时，λ＝2；

为所述第三配置信息；R为所述第四配置信息。In a possible implementation manner, the method further includes: the terminal device acquires the first number of frequency hops n _hop in the following manner:

Wherein, n _hop is the first frequency hopping times, m _{SRS, 0} represents the configured SRS cell-level bandwidth,

Indicates the configured SRS terminal device-level bandwidth; or, the terminal device receives the first frequency hop times n _hop from the network device; or, the terminal device according to the following manner, according to the third configuration information, the The fourth configuration information and the fifth configuration information determine the first frequency hopping times: the first frequency hopping times

λ is a parameter determined by the fifth configuration information: when the second configuration information indicates that 1T4R antenna switching is enabled, λ=4; when the second configuration information indicates that 2T4R or 1T2R antenna switching is enabled, λ = 2;

is the third configuration information; R is the fourth configuration information.

In a possible implementation manner, the method further includes: the terminal device calculates the first parameter according to the first frequency hopping times in the following manner:

R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，n_hop表示所述第一跳频次数，

表示向下取整运算；所述终端设备根据所述第一参数，确定在第

个SRS符号上发送SRS所使用天线的天线端口索引，

为自然数。Wherein, n _{SRS_AS} is the first parameter,

R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

The serial number of an SRS symbol in the first SRS, n _hop represents the first frequency hopping times,

Indicates the rounding down operation; the terminal device determines the first parameter according to the first parameter

The antenna port index of the antenna used to transmit SRS on each SRS symbol,

is a natural number.

In a possible implementation manner, the method further includes: the terminal device acquires the first number of frequency hops n _hop in the following manner:

表示第二SRS终端设备级带宽，B_SRS∈{0，1，2，3}。其中b可以是所述网络设备高层参数配置的，可选的，b也可以表示为b_hop，由高层RRC信令配置。Wherein, n _hop is the first frequency hopping times, m _{SRS, b} represents the first SRS terminal equipment-level bandwidth, b=0, 1, 2, 3,

Denotes the second SRS terminal device-level bandwidth, B _SRS ∈ {0, 1, 2, 3}. Wherein, b may be configured by a high-layer parameter of the network device, and optionally, b may also be expressed as b _hop , which is configured by high-layer RRC signaling.

In a possible implementation manner, the method further includes: the terminal device receiving a first frequency hop count n _hop from the network device.

或

其中

和

分别表示向上和向下取整运算。

为所述第三配置信息；R为所述第四配置信息。λ为由所述第五配置信息确定的参数，例如，当所述第二配置信息指示1T4R天线切换使能时，λ＝4；当所述第二配置信息指示2T4R或1T2R天线切换使能时，λ＝2，或者λ根据UE上报的天线能力信息确定，In a possible implementation manner, the method further includes: the terminal device determines the first hop according to the third configuration information, the fourth configuration information, and the fifth configuration information in the following manner: Frequency times: the first frequency hopping times

or

in

and

Represents up and down rounding operations, respectively.

is the third configuration information; R is the fourth configuration information. λ is a parameter determined by the fifth configuration information, for example, when the second configuration information indicates that 1T4R antenna switching is enabled, λ=4; when the second configuration information indicates that 2T4R or 1T2R antenna switching is enabled , λ=2, or λ is determined according to the antenna capability information reported by the UE,

In a possible implementation manner, the method further includes: the terminal device calculates the first parameter according to the first frequency hopping times in the following manner:

or,

R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，n_hop表示所述第一跳频次数，

和

分别表示向上和向下取整运算；所述终端设备根据所述第一参数，确定在第

个SRS符号上发送SRS所使用天线的天线端口索引，

为自然数。Wherein, n _{SRS_AS} is the first parameter,

R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

The serial number of an SRS symbol in the first SRS, n _hop represents the first frequency hopping times,

and

represent up and down rounding operations respectively; the terminal device determines the first parameter according to the first parameter

The antenna port index of the antenna used to transmit SRS on each SRS symbol,

is a natural number.

个符号，根据以下方式确定所述第

个符号的天线端口索引：In a possible implementation manner, the method further includes: the terminal device acquiring fifth configuration information; the fifth configuration information is used to indicate the antenna mode supported by the terminal device; if the fifth configuration The antenna mode indicated by the information is 1T4R, and when the terminal device uses frequency hopping to transmit the first SRS, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号，根据以下方式确定所述第

个符号的天线端口索引：If the antenna mode indicated by the fifth configuration information is 1T2R, and when the terminal device uses frequency hopping to transmit the first SRS, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号，根据以下方式确定所述第

个符号的天线端口索引：If the antenna mode indicated by the fifth configuration information is 2T4R, and when the terminal device uses frequency hopping to transmit the first SRS, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

Where Λ represents the number of antenna pairs used by the terminal device to transmit the first SRS.

个符号，根据以下方式确定所述第

个符号的天线端口索引：In a possible implementation manner, the method further includes: the terminal device acquiring fifth configuration information; the fifth configuration information is used to indicate the antenna mode supported by the terminal device; if the fifth configuration The antenna mode indicated by the information is 1T4R, and when the terminal device uses frequency hopping to transmit the first SRS, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号的天线端口索引，n_{SRS_AS}为所述第一参数； K为频域上分成的份数由所述第一配置信息和第二配置信息获得，K为正整数；β为预设值；Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols, n _{SRS_AS} is the first parameter; K is the number of divisions in the frequency domain obtained from the first configuration information and the second configuration information, K is a positive integer; β is a preset value;

个符号，根据以下方式确定所述第

个符号的天线端口索引：Or, if the antenna mode indicated by the fifth configuration information is 1T4R, and when the terminal device does not transmit the SRS by frequency hopping, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

a(n _{SRS_AS} )=n _{SRS_AS} mod 4

个符号的天线端口索引，n_{SRS_AS}为所述第一参数。Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols, n _{SRS_AS} is the first parameter.

个符号，根据以下方式确定所述第

个符号的天线端口索引：In a possible implementation manner, the method further includes: if the antenna mode indicated by the fifth configuration information is 2T4R, and when the terminal device transmits the first SRS in a frequency hopping manner, for the of the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号的天线端口索引，Λ表示终端设备用于传输所述第一SRS的天线对数，n_{SRS_AS}为所述第一参数； K为频域上分成的份数由所述第一配置信息和第二配置信息获得，K为正整数；β为预设值；Among them, a(n _{SRS_AS} ) represents the first

Antenna port index of symbols, Λ represents the number of antenna pairs used by the terminal device to transmit the first SRS, n _{SRS_AS} is the first parameter; K is the number of shares divided in the frequency domain by the first configuration information and The second configuration information is obtained, K is a positive integer; β is a preset value;

个符号，根据以下方式确定所述第

个符号的天线端口索引：Or, if the antenna mode indicated by the fifth configuration information is 2T4R, and when the terminal device does not transmit the SRS by frequency hopping, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

a(n _{SRS_AS} )=n _{SRS_AS} modΛ

个符号的天线端口索引，n_{SRS_AS}为所述第一参数，Λ表示终端设备用于传输所述第一SRS的天线对数。Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols, n _{SRS_AS} is the first parameter, and Λ represents the number of antenna pairs used by the terminal device to transmit the first SRS.

个符号，根据以下方式确定所述第

个符号的天线端口索引：In a possible implementation manner, the method further includes: if the antenna mode indicated by the fifth configuration information is 1T2R, and when the terminal device transmits the first SRS in a frequency hopping manner, for the of the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号的天线端口索引；n_{SRS_AS}为所述第一参数； K为频域上分成的份数由所述第一配置信息和第二配置信息获得，K为正整数；β为预设值；Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols; n _{SRS_AS} is the first parameter; K is the number of divisions in the frequency domain obtained from the first configuration information and the second configuration information, K is a positive integer; β is a preset value;

个符号，根据以下方式确定所述第

个符号的天线端口索引：Or, if the antenna mode indicated by the fifth configuration information is 1T2R, and when the terminal device does not transmit the SRS by frequency hopping, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

a(n _{SRS_AS} )=n _{SRS_AS} mod 2

个符号的天线端口索引，n_{SRS_AS}为所述第一参数。Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols, n _{SRS_AS} is the first parameter.

In a possible implementation, the method further includes:

The terminal device acquires sixth configuration information, where the sixth configuration information is used to indicate, within a subframe, the number of each guard interval GP symbol in all SRS symbols included in the first SRS, the position of each GP symbol, and The length of each GP symbol; or, the terminal device obtains the seventh configuration information, the seventh configuration information is a bitmap, and each bit in the bitmap is uniquely corresponding to a symbol in a subframe ; When the value of a bit in the bitmap is the first value, it means that the symbol corresponding to the bit is an SRS symbol.

In a possible implementation manner, the method further includes: the terminal device receiving a transmission power control TPC from the network device; when the first SRS is a traditional SRS, the terminal device determines according to the TPC The transmission power of the first SRS; or, when the first SRS is an additional SRS, the terminal device determines the transmission power of the first SRS according to the TPC; or, when the first SRS is a traditional When SRS or SRS is added, the terminal device determines the transmission power of the first SRS according to the TPC; the terminal device uses the transmission power to transmit the first SRS.

In a fourth aspect, the embodiment of the present application provides a signal transmission method, including: the network device sends the first configuration information and the second configuration information to the terminal device; the first configuration information is used to indicate the frequency hopping bandwidth configuration of the SRS; the The second configuration information is used to indicate the terminal device level SRS bandwidth configuration; the network device receives the first SRS from the terminal device; the terminal device performs frequency hopping transmission according to the first configuration information and the second configuration information For the first SRS, the antenna for sending the first SRS is switched every time frequency hopping is used to detect the entire cell-level SRS bandwidth.

In a possible implementation, the method includes:

The network device sends a transmission power control TPC to the terminal device; the TPC is used to indicate that at least one guard interval GP symbol is included between the first SRS and the second SRS to be sent by the terminal device; When the first SRS is a traditional SRS, the second SRS is an additional SRS; or, when the first SRS is an additional SRS, the second SRS is a traditional SRS.

In a possible implementation, the method further includes:

The network device sends a transmission power control TPC to the terminal device; the TPC is used to indicate: when the first SRS symbol of the first SRS is the same as the third SRS symbol in the third SRS to be sent by the terminal device When adjacent, the terminal device transmits the first SRS and the third SRS with the same bandwidth; when the first SRS is a traditional SRS, the third SRS is an additional SRS; or, when the When the first SRS is an additional SRS, the third SRS is a traditional SRS.

In the fifth aspect, the embodiment of the present application provides a signal transmission method, including:

The terminal acquires first information, where the first information is used to indicate SRS antenna switching;

The terminal performs SRS antenna switching according to the first information;

Wherein, the SRS antenna switching satisfies:

或者，

or,

或者，

or,

个SRS符号上发送SRS所使用天线的天线端口索引，

R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

表示SRS的符号数(例如可以通过SRS的起始符号和SRS的传输持续时间获得，可选的，SRS的传输持续时间不包括保护符号guard symbol)，m_SRS，b表示第一UE级带宽，b＝0，12，3，

表示第二UE级带宽，B_SRS∈{0，1，2，3}。其中b可以是网络设备配置给终端的。可选的，b也可以表示为b_hop，由网络设备配置给终端。例如：网络设备通过RRC信令将b或者b_hop，发送给终端。Λ表示终端设备用于传输所述SRS的天线对数。例如，Λ的取值可以是2，或者3。作为一种可选的理解，Λ的取值为2时，对应的天线对数为{2a(n_SRS)，2a(n_SRS)+1}Among them, a(n _SRS ) means the first

The antenna port index of the antenna used to transmit SRS on each SRS symbol,

R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

Represents the number of symbols of the SRS (for example, it can be obtained through the start symbol of the SRS and the transmission duration of the SRS. Optionally, the transmission duration of the SRS does not include the guard symbol), m _{SRS, b} represents the first UE level bandwidth, b=0, 12, 3,

Denotes the second UE level bandwidth, B _SRS ∈ {0, 1, 2, 3}. Where b may be configured for the terminal by the network device. Optionally, b can also be expressed as b _hop , which is configured to the terminal by the network device. For example: the network device sends b or b _hop to the terminal through RRC signaling. Λ represents the number of antenna pairs used by the terminal device to transmit the SRS. For example, the value of Λ can be 2 or 3. As an optional understanding, when the value of Λ is 2, the corresponding number of antenna pairs is {2a(n _SRS ), 2a(n _SRS )+1}

作为一种可选的设计，当终端设备的天线模式为1T2R时，可以采用

作为一种可选的设计，当终端设备的天线模式为2T4R时，可以采用

其中，终端设备的天线模式可以由网络设备配置。例如，网络设备通过高层RRC信令将终端设备的天线模式配置为1T2R，1T4R，或者2T4R。; As another optional understanding, when the value of Λ is 3, the corresponding number of antenna pairs is {0, a(n _SRS )+1}. As an optional design, when the antenna mode of the terminal equipment is 1T4R, you can use

As an optional design, when the antenna mode of the terminal equipment is 1T2R, you can use

As an optional design, when the antenna mode of the terminal equipment is 2T4R, you can use

Wherein, the antenna mode of the terminal device may be configured by the network device. For example, the network device configures the antenna mode of the terminal device as 1T2R, 1T4R, or 2T4R through high-layer RRC signaling.

For other optional designs and descriptions of the fifth aspect, reference may be made to the relevant content of the first to fourth aspects above, and details will not be repeated here.

In a sixth aspect, the embodiment of the present application provides a signal transmission method, including:

The network device sends first information to the terminal device, where the first information is used to instruct the terminal device to perform SRS antenna switching.

Wherein, the SRS antenna switching satisfies:

或者，

or,

或者，

or,

Regarding the above-mentioned formula of the sixth aspect, as well as optional designs, etc., reference may be made to the description of the fifth aspect.

In a seventh aspect, the present application provides a device. The device has the function of realizing the terminal device involved in the above first aspect or the third aspect or the fifth aspect, for example, the device includes the terminal device performing the steps involved in the above first aspect or the third aspect or the fifth aspect The corresponding modules or units or means (means), the functions or units or means (means) may be implemented by software, or by hardware, or may be implemented by executing corresponding software by hardware.

In a possible design, the apparatus includes a processing unit and a transceiver unit, and the functions performed by the processing unit and the transceiver unit may correspond to the steps performed by the terminal device involved in the first aspect, the third aspect, or the fifth aspect.

In a possible design, the device includes a processor, and may also include a transceiver, the transceiver is used to send and receive signals, and the processor executes program instructions to complete the first aspect or the third aspect or the fifth aspect A method executed by a terminal device in any possible design or implementation manner in the aspect.

Wherein, the device may further include one or more memories, and the memories are used to be coupled with the processor. The one or more memories may be integrated with the processor, or may be configured separately from the processor, which is not limited in this application.

In a possible manner, the memory stores necessary computer program instructions and/or data for realizing functions of the terminal device involved in the first aspect, the third aspect, or the fifth aspect. The processor may execute the computer program instructions stored in the memory to complete the method performed by the terminal device in any possible design or implementation manner of the first aspect, the third aspect, or the fifth aspect.

In an eighth aspect, the present application provides a device. The device has the function of implementing the network equipment involved in the second aspect, the fourth aspect, or the sixth aspect, for example, the device includes the network equipment performing the steps involved in the second aspect, the fourth aspect, or the sixth aspect. Corresponding modules or units or means (means). The functions or units or means (means) may be realized by software, or by hardware, or by executing corresponding software by hardware.

In a possible design, the device includes a processing unit and a transceiver unit, and the functions performed by the processing unit and the transceiver unit may be related to any possible design or implementation of the second aspect, the fourth aspect, or the sixth aspect. corresponding to the steps performed by your network device.

In another possible design, the communication device includes a processor, and may further include a transceiver, the transceiver is used to send and receive signals, and the processor executes program instructions to complete the second aspect or the fourth aspect or A method executed by a network device in any possible design or implementation manner in the sixth aspect.

Wherein, the device may further include one or more memories, and the memories are used to be coupled with the processor. The one or more memories may be integrated with the processor, or may be configured separately from the processor, which is not limited in this application.

In a possible manner, the memory stores necessary computer program instructions and/or data for implementing functions of the network device involved in any possible design or implementation manner of the second aspect, the fourth aspect, or the sixth aspect. The processor may execute the computer program instructions stored in the memory to complete the method performed by the network device in any possible design or implementation manner of the second aspect, the fourth aspect, or the sixth aspect.

An embodiment of the present application provides a computer-readable storage medium, where computer-readable instructions are stored in the computer-readable medium, and when the computer reads and executes the computer-readable instructions, the computer can execute any of the above-mentioned possible designs method in . Wherein the computer may be the aforementioned terminal device or network device.

An embodiment of the present application provides a computer program product. When a computer reads and executes the computer program product, the computer is made to execute the method in any one of the above possible designs.

An embodiment of the present application provides a chip, the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, so as to implement the method in any of the above possible designs.

An embodiment of the present application provides a communication system, including any possible terminal device described above and any possible network device described above.

Description of drawings

FIG. 1 is a schematic diagram of transmitting SRS in a frequency hopping manner and performing antenna switching in the prior art;

FIG. 2 is a schematic diagram of a communication system for transmitting an SRS method provided in an embodiment of the present application;

FIG. 3 is a schematic flowchart of a signal transmission method provided by an embodiment of the present application;

FIG. 4 is a bitmap corresponding to the SRS transmission method provided by the embodiment of the present application;

FIG. 5 is a schematic diagram of a terminal device transmitting an SRS provided in an embodiment of the present application;

6 is a schematic diagram of frequency hopping transmission SRS;

FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

Detailed ways

The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

Embodiments of the present application may be applied to new radio (new radio, NR) system, global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (wideband code A division multiple access (WCDMA) system, a long term evolution (long term evolution, LTE) system, an advanced long term evolution (advanced long termevolution, LTE-A) system and other communication systems, specifically, is not limited here.

To facilitate understanding of the embodiment of the present application, first, the communication system shown in FIG. 2 is taken as an example to describe in detail the communication system applicable to the embodiment of the present application. FIG. 2 shows a schematic diagram of a communication system applicable to the antenna switching method of the embodiment of the present application. In FIG. 2 , the network device estimates the uplink channel quality of different frequency bands through the SRS sent by the terminal device. A network device is an entity on the network side for transmitting or receiving signals, and can configure SRS parameters for a terminal device. A terminal device is an entity on the user side for receiving or transmitting signals, and can send an SRS to a network device.

In the embodiment of the present application, the terminal device may be a device with a wireless transceiver function or a chip that can be set in any device, and may also be called user equipment (user equipment, UE), access terminal, user unit, user station , mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user device. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, an industrial Wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety Wireless terminals in smart cities, wireless terminals in smart cities, wireless terminals in smart homes, etc.

The network equipment may be an evolved base station (eNB) in an LTE system, or a base station in a global system of mobile communication (GSM) system or a code division multiple access (CDMA) system (base transceiver station, BTS), or a base station (nodeB, NB) in a wideband code division multiple access (wideband code division multiple access, WCDMA) system. The network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. For the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

In combination with the above description, as shown in FIG. 3 , it is a schematic flowchart of a signal transmission method provided by an embodiment of the present application.

Step 301: The terminal device reports capability information.

Step 302: The network device determines high-layer parameters according to the capability information, and sends the high-layer parameters to the terminal device.

Step 303: The terminal device sends an SRS to the network device according to the high layer parameters.

Step 304: the network device receives the SRS from the terminal device, and performs channel estimation according to the SRS.

In step 301, the capability information may include the antenna mode supported by the terminal device, for example, the antenna mode may be '2T4R', '1T4R', '1T2R' and so on. The antenna mode supported by the terminal device may indicate how many antennas the terminal device has for receiving signals and how many antennas are available for sending signals. For example, when the antenna mode is 2T4R, 2T means that the number of antennas used to transmit signals is 2, and 4R means that the number of antennas used to receive signals is 4, and so on for other cases, which will not be repeated here.

The capability information of the terminal device may also include information such as bandwidth supported by the terminal device, transmission power of the terminal device, etc., which will not be described here one by one.

In step 302, the high-level parameters configured by the network device may include one or more of the following:

The first configuration information is used to indicate the frequency hopping bandwidth configuration b _hop of the SRS. The specific name of the first configuration information is not limited, for example, it may be called the frequency hopping bandwidth of the SRS (srs-HoppingBandwidth).

The second configuration information is used to indicate the SRS bandwidth B _SRS , and the specific name of the second configuration information is not limited, for example, it may be called SRS bandwidth (srs-Bandwidth).

也就是第一SRS占用的时域符号在正常子帧上，包括除最后一个OFDM符号以外的其它至少一个OFDM符号，对第三配置信息的具体名称并不限定，例如可以称为Rel-16 LTE标准下的传输符号数(nrofSymbols-r16)。The third configuration information is used to indicate the number of SRS symbols transmitted in a subframe

That is, the time-domain symbol occupied by the first SRS is on a normal subframe, including at least one OFDM symbol other than the last OFDM symbol. The specific name of the third configuration information is not limited, for example, it can be called Rel-16 LTE The number of transmitted symbols under the standard (nrofSymbols-r16).

The fourth configuration information is used to indicate the SRS symbol repetition factor R, and the specific name of the fourth configuration information is not limited, for example, it may be called the repetition factor (repetition Factor-r16) under the Rel-16 LTE standard.

The first parameter is used to instruct the terminal device to transmit the antenna port index of the SRS antenna. The specific name of the first parameter is not limited, for example, it may be called the SRS antenna switching transmission count (n _{SRS_AS} ).

The fifth configuration information is used to indicate the antenna mode supported by the terminal device. The specific name of the fifth configuration information is not limited, for example, it may be called SRS-Antenna-Switching (SRS-Antenna-Switching).

The sixth configuration information is used to indicate the number of each guard period (guard period, GP) symbol in all SRS symbols included in the first SRS, the position of each GP symbol, and the length of each GP symbol in a subframe . Each GP contains Y orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols, and Y is a positive integer. It should be noted that SRS symbols can refer to OFDM symbols occupied by SRS, and non-SRS symbols can refer to non-SRS symbols. OFDM symbols occupied by the signal.

The seventh configuration information is used to indicate that the symbols sent in one subframe are SRS symbols or GP symbols. The specific name of the seventh configuration information is not limited, for example, it may be called a bitmap (bitmap).

The eighth configuration information is used to indicate the cell-specific parameter C _SRS , and the specific name of the eighth configuration information is not limited, for example, it may be called SRS bandwidth configuration (srs-BandwidthConfig).

The ninth configuration information is used to indicate the starting position of the SRS frequency domain, and the specific name of the ninth configuration information is not limited, for example, it may be called a frequency domain position (freqDomainPosition).

In step 303, the terminal device determines GP, SRS transmission power, whether to enable frequency hopping SRS transmission, and switched antenna port index according to the received high-level parameters, which will be described in detail below.

The end device determines the GP:

The sixth configuration information in the high layer parameters may indicate the number, position and length of each GP included in a subframe. GP contains Y OFDM symbols, Y can be 1 or other positive integers, and the GP lengths in frequency hopping or antenna switching can be the same or different, and each OFDM symbol in Y OFDM symbols can also be called a GP symbol. The network device can determine the number and length of the required GPs according to the capability information of the terminal device or the network device itself. The method of indicating the GP through the sixth configuration information is a display mode. In addition to the sixth configuration information, parameters such as the third configuration information and the fourth configuration information may also be independently included in the high-level parameters to indicate terminal devices respectively.

If the sixth configuration information is not included in the high-level parameters, the number and position of all GPs and the length of each GP may also be indicated implicitly. For example, it is also possible to configure a bitmap (bitmap) through a high-level parameter, include the third configuration information, the fourth configuration information and the sixth configuration information in a unified manner, and jointly indicate the GP of the terminal device through the bitmap.

为子帧中SRS 符号的序号。在bitmap中，比特为‘1’表示该位置上有SRS符号；比特位为‘0’表示该位置上没有SRS符号，该位置上有GP符号。其中，第三配置信息指示了bitmap中比特位的总数目，第四配置信息指示了bitmap中比特连续为‘1’的比特位数目，第六配置信息指示了bitmap中比特为‘0’的比特位数目及位置。终端设备根据bitmap来传输SRS符号，在计算SRS传输计数n_SRS时将不包括这些GP符号。由图4可知，第0、1、3、4、6、7个符号位置对应比特为‘1’，因此这些符号位置上均有SRS符号；第2、5、8～12个符号位置对应比特为‘0’，这些符号位置上均没有SRS符号，但均有GP符号。As shown in Figure 4, the bitmap corresponding to the antenna switching method provided by the embodiment of the present application, the horizontal axis

is the sequence number of the SRS symbol in the subframe. In the bitmap, a bit of '1' indicates that there is an SRS symbol at this position; a bit of '0' indicates that there is no SRS symbol at this position, and there is a GP symbol at this position. Wherein, the third configuration information indicates the total number of bits in the bitmap, the fourth configuration information indicates the number of bits whose bits are '1' consecutively in the bitmap, and the sixth configuration information indicates the bits whose bits are '0' in the bitmap Number and location of bits. The terminal equipment transmits SRS symbols according to the bitmap, and these GP symbols will not be included when calculating the SRS transmission count n _SRS . It can be seen from Figure 4 that the bits corresponding to the 0, 1, 3, 4, 6, and 7 symbol positions are '1', so there are SRS symbols in these symbol positions; the bits corresponding to the 2, 5, 8-12 symbol positions is '0', there are no SRS symbols in these symbol positions, but there are GP symbols.

The terminal device determines the SRS transmission power:

Frequency domain resources of LTE SRS:

The existing Rel-15 LTE standard supports SRS transmission in uplink normal subframes or special subframes. The SRS transmitted in the normal subframe is located on the last OFDM symbol; the SRS transmitted in the special subframe is located on the OFDM symbol included in the UpPTS. In order to improve the SRS capacity, the UpPTS in the special subframe can be configured with up to 6 OFDM symbols and used for SRS transmission. However, as the demand for supporting multiple services and applications continues to grow, the shortage of SRS capacity becomes apparent. In order to further enhance the capacity and coverage of SRS, a new type of SRS symbol is introduced in Rel-16 LTE to meet the SRS transmission of multiple symbols in a normal subframe. In order to distinguish it from the SRS in the existing Rel-15 LTE, the SRS in the Rel-15 LTE is called a legacy SRS (legacySRS), and the SRS introduced in Rel-16 is called an additional SRS (additional SRS). At present, the standard agrees that the first 1 to 13 OFDM symbols of a normal subframe can be used to transmit additional SRS, the OFDM symbols occupied by additional SRS in the first 1 to 13 OFDM symbols are additional SRS symbols, and the last symbol in a normal subframe can be used For legacy SRS transmission, the last OFDM symbol occupied by legacy SRS in a normal subframe is an additional SRS symbol. In other words, the legacy SRS is distributed on the last OFDM symbol, and the legacy SRS intervals of different combs are distributed alternately; the additional SRS is distributed on the 1st to 13 OFDM symbols and can occupy one or more OFDM symbols.

Two types of legacySRS transmission are defined in the existing Rel-15 LTE protocol (TS 36.213 v15.4.0 Section 8.2): The first type, periodic SRS transmission (trigger type 0): configured by high-layer RRC signaling, each Send once every certain period. The second type, aperiodic SRS transmission (trigger type 1): triggered by downlink control information (downlink control information, DCI) of a physical downlink control channel (physical downlink control channel, PDCCH).

The time-domain, frequency-domain and code-domain SRS parameters of trigger type 0 and trigger type 1 are semi-statically configured by higher layer RRC signaling. The legacy SRS of Rel-15 supports periodic transmission and aperiodic transmission. For the addition SRS of Rel-16, according to the discussion results of 3GPP RAN1#94, #94bis, #95 and #96 meetings, it has been agreed to support aperiodic SRS transmission in subframes. In addition, the standard already supports that the same terminal equipment can support legacy SRS and additional SRS transmission at the same time.

The frequency domain resource of SRS is determined by three elements: SRS bandwidth, transmission comb offset and frequency domain starting position. After these three elements are determined, the resources occupied by the frequency domain of the SRS can be determined.

从TS 36.211的表格5.5.3.2-1至5.5.3.2-4(见表1至4)中选出所需查找表，再根据高层参数SRS带宽配置(srs-BandwidthConfig)配置的小区特定的第八配置信息，C_SRS∈ {0，1，2，3，4，5，6，7}和高层参数SRS带宽(srs-Bandwidth)配置的UE特定的第二配置信息 B_SRS∈{0，1，2，3}，从查找表中获得当b＝B_SRS时，SRS带宽大小m_SRS，b和频域上分成的份数 N_b。由表可知，给定小区特定的参数C_SRS之后，B_SRS＝0对应的SRS信号带宽最大，本申请实施例中，将B_SRS对应的m_SRS，0称为宽带SRS信号带宽。并且，由表1～表4可知，得到下一级SRS信号带宽总是等于上一级带宽除以下一级分成的份数：m_SRS，1＝m_SRS，0/N₁和 m_SRS，2＝m_SRS，1/N₂和m_SRS，3＝m_SRS，2/N₃。本申请实施例中，将B_SRS＝1、B_SRS＝2、 B_SRS＝3对应的SRS带宽m_SRS，1、m_SRS，2、m_SRS，3称为窄带SRS带宽。The first step is to determine the SRS bandwidth m _SRS,b , that is, how many RBs each SRS occupies in the frequency domain. According to the upstream bandwidth

Select the required lookup table from Tables 5.5.3.2-1 to 5.5.3.2-4 (see Tables 1 to 4) of TS 36.211, and then configure the cell-specific eighth Configuration information, UE-specific second configuration information C _SRS ∈ {0, 1, 2, 3, 4, 5, 6, 7} and high layer parameter SRS bandwidth (srs-Bandwidth) configuration B _SRS ∈ {0, 1, 2, 3}, when b=B _SRS , the SRS bandwidth size m _{SRS, b} and the number of divisions N _b in the frequency domain are obtained from the lookup table. It can be seen from the table that after the cell-specific parameter C _SRS is given, the SRS signal bandwidth corresponding to B _SRS = 0 is the largest. In the embodiment of the present application, the m _{SRS, 0 corresponding to B SRS is} called the broadband SRS signal bandwidth. And, as can be seen from Tables 1 to 4, the lower-level SRS signal bandwidth is always equal to the upper-level bandwidth divided by the number of divisions of the lower level: m _{SRS, 1} = m _{SRS, 0} /N ₁ and m _{SRS, 2} =m _SRS,1 /N ₂ and m _SRS,3 =m _SRS,2 /N ₃ . In this embodiment of the present application, the SRS bandwidths m _SRS, 1 , m SRS,2 , and m _SRS ,3 corresponding to B _SRS =1, B _SRS = ₂ , and B _{SRS =3} are referred to as narrowband SRS bandwidths.

b＝0，1，2，3时，m_SRS，b和N_b的取值Table 1

When b=0, 1, 2, 3, the value of m _{SRS, b} and N _b

b＝0，1，2，3时，m_SRS，b和N_b的取值Table 2

When b=0, 1, 2, 3, the value of m _{SRS, b} and N _b

b＝0，1，2，3时，m_SRS，b和N_b的取值table 3

When b=0, 1, 2, 3, the value of m _{SRS, b} and N _b

b＝0，1，2，3时，m_SRS，b和N_b的取值Table 4

When b=0, 1, 2, 3, the value of m _{SRS, b} and N _b

由高层参数(transmissionCombNum)配置传输梳齿数目KTC(例如可以为4)，否则K_TC＝2。传输梳齿偏移

不同UE在相同子帧、相同RB集合上发送SRS时，彼此之间使用不同的传输梳齿偏移予以区分。The second step is to determine the transmission comb offset

The number of transmission combs KTC (for example, 4) is configured by a high layer parameter (transmissionCombNum), otherwise K _TC =2. Transmission Comb Offset

When different UEs transmit SRSs on the same subframe and the same RB set, they use different transmission comb offsets to distinguish them.

由第一步中SRS信号带宽占据RB数目为m_SRS，b，每一个RB包含

个子载波，可得SRS信号带宽占据子载波数为

结合宽带 SRS信号频域起始位置

和窄带SRS信号频域位置索引nb，给出窄带SRS信号频域上的起始的子载波位置为：The third step is to determine the starting position in the frequency domain

The number of RBs occupied by the SRS signal bandwidth in the first step is m _SRS,b , and each RB contains

subcarriers, the number of subcarriers occupied by the available SRS signal bandwidth is

Combined wideband SRS signal frequency domain starting position

and the narrowband SRS signal frequency domain position index nb, the starting subcarrier position on the frequency domain of the narrowband SRS signal is given as:

和

两部分来分析：The formula (1) is divided into

and

Two parts to analyze:

表示频带上可用于SRS传输的第一个子载波的位置，或者说宽带SRS的起始子载波所在的位置。

由上行带宽

宽带SRS带宽m_SRS，0和SRS梳齿

共同决定。对于正常子帧而言。the first item

Indicates the position of the first subcarrier available for SRS transmission on the frequency band, or the position of the starting subcarrier of the wideband SRS.

Uplink bandwidth

Broadband SRS bandwidth m _{SRS, 0} and SRS comb

decided together. For normal subframes.

是为了把上行系统低频处，用于PUCCH传输的区域排除掉。梳齿

的值由第二步给出。in

It is to exclude the area used for PUCCH transmission at the low frequency of the uplink system. comb teeth

The value of is given by the second step.

表示根据窄带SRS信号的频带宽度

和频域位置索引n_b来选出对应SRS子带在整个宽带SRS中所处的频域位置。n_b的值与高层配置的频域位置参数n_RRC∈{0，1，...，23}有关，即每个最小的SRS子带对应一个频域位置索引n_b，对应一个n_RRC的数值。second section

Indicates the frequency bandwidth according to the narrowband SRS signal

and the frequency domain position index n _b to select the frequency domain position of the corresponding SRS subband in the entire wideband SRS. The value of n _b is related to the frequency domain position parameter n _RRC ∈ {0, 1, ..., 23} configured by the high layer, that is, each smallest SRS subband corresponds to a frequency domain position index n _b , corresponding to an n _RRC value.

Frequency domain resources of NR SRS:

Similar to Rel-15 LTE SRS, the frequency domain resource of Rel-15 NR SRS is determined by three elements: SRS bandwidth, transmission comb offset and frequency domain starting position. After these three elements are determined, the resources occupied by the frequency domain of the SRS can be determined.

The first step is to determine the SRS bandwidth m _SRS,b , that is, how many RBs each SRS occupies in the frequency domain. According to the configuration parameters C _SRS ∈ {0, 1, ..., 63} and B _SRS ∈ {0, 1, 2, 3}, look up the table of TS 38.211 (Table 5), and obtain the frequency domain information of each SRS The number of occupied RBs m _SRS,b and the number of divisions N _b in the frequency domain, where b=B _SRS .

由高层参数transmissionCombNum配置传输梳齿数目 K_TC∈{2，4}。传输梳齿偏移

不同UE在相同子帧、相同RB集合上发送SRS时，彼此之间使用不同的传输梳齿偏移予以区分。The second step is to determine the transmission comb offset

The number of transmission combs K _TC ∈ {2, 4} is configured by the high-level parameter transmissionCombNum. Transmission Comb Offset

When different UEs transmit SRSs on the same subframe and the same RB set, they use different transmission comb offsets to distinguish them.

由公式

获得。其中，

表示频带上可用于SRS传输的第一个子载波的位置，

由频域移位值n_shift、传输梳齿数目K_TC和传输梳齿偏移

共同决定。

表示SRS信号序列的长度(即占多少个子载波)。n_b表示频域位置索引。The third step is to determine the starting position in the frequency domain

by the formula

get. in,

Indicates the position of the first subcarrier available for SRS transmission on the frequency band,

From the frequency domain shift value n _shift , the number of transmission combs K _TC and the transmission comb offset

decided together.

Indicates the length of the SRS signal sequence (that is, how many subcarriers it occupies). n _b represents the frequency domain position index.

table 5

The terminal device may also determine the power at which the terminal device transmits the SRS. The network device instructs the terminal device to transmit power of the SRS through transmission power control (transmit power control, TPC) in downlink control information (downlink control information, DCI). Wherein, the SRS transmitted by the terminal device includes two types: legacy SRS and additional SRS.

For TPC, since the additional SRS can be triggered by the DCI format of Rel-15 alone or together with the traditional SRS, the TPC issues will be discussed one by one below. In the current specification, the TPC is carried in the DCI, and the usage of the TPC is summarized in Table 6.

TPC in DCI TPC usage Authorized in the uplink PUSCH authorized in the downlink PUCCH In DCI format is 3/3A PUCCH and PUSCH In DCI format is 3B SRS

Table 6 TPC signaling and usage

1) For the case where the format of TPC in DCI is 3B, on the carrier without PUSCH/PUCCH configuration, TPC command can be used to instruct TPC dynamic adjustment. Therefore, TPC is only used for SRS. This design, along with the power control formula (Equation 1), can be easily repeated for additional SRSs with very little specification impact.

P _{SRS, c} (i) = min { P _{CMAX, c} (i), 10log ₁₀ (M _{SRS, c} ) + P _{O_SRS, c} (m) + α _{SRS, c} PL _c + f _{SRS, c} (i) }[dBm]

2) For UL grants or DCI formats 3/3A, the TPC value is used for power control, but also for additional SRS if triggered. There are two cases:

Case 1: Only aperiodic additional SRS is triggered.

In this case, because only the additional SRS is triggered, the TPC value in the corresponding DCI applies to both the additional SRS and the PUSCH. However, the power control of the additional SRS can be reused (Equation 1).

Case 2: The traditional SRS and the additional SRS are triggered in the same subframe.

In this case, the simple approach is that one TPC value applies to the additional SRS and PUSCH. Additional SRS can be used (Equation 1), while legacy SRS follows power control coupled with PUSCH.

3) For DL grant, TPC value can be used for PUCCH and additional SRS. In addition, power control formulas are used for additional SRS.

In summary, when triggering an additional SRS, the TPC value in the DCI applies to the additional SRS regardless of the DCI format. And the power control formula of SRS in 3B format without PUSCH/PUCCH DCI can be reused.

In the Rel-15 LTE standard, the power indicated by the TPC in the DCI is the power for the terminal device to transmit the legacy SRS. After the introduction of the additional SRS, if the DCI triggers the additional SRS, the TPC indicates the transmission power control of the additional SRS. If the DCI only triggers the legacy SRS, the TPC indicates the transmission power control of the legacy SRS.

For the Rel-16 LTE standard, one DCI is supported to trigger legacy SRS and additional SRS transmission at the same time. At this time, one of the following three methods should be followed:

The first type: if a DCI triggers the legacy SRS and the additional SRS at the same time, the TPC in the DCI is used to calculate the transmission power of the legacy SRS and the additional SRS at the same time. In this way, the continuity of the protocol can be maintained without changing the agreement of the original protocol, and the compatibility of the system can be improved.

The second type: if a DCI triggers the legacy SRS and the additional SRS at the same time, the TPC in the DCI is only used for the power calculation of the legacy SRS.

Through this method, it can be guaranteed that the behavior of the legacy SRS will not change, and the SRS interference to other terminal devices will not change.

The third type: if a DCI triggers the legacy SRS and the additional SRS at the same time, the TPC in the DCI is only used for the power calculation of the additional SRS.

Through this method, it can be guaranteed that the behavior of the additional SRS will not change, and the SRS interference to other terminal devices will not change.

For the Rel-16 LTE standard, simultaneous transmission of the legacy SRS and the additional SRS is supported within one subframe, and due to different parameters such as bandwidth, the transmission power of the legacy SRS and the additional SRS is often different. Now the first 13 OFDM symbols of normal subframes can be used to transmit additional SRS. When the additional SRS and legacy SRS are directly adjacent in the time domain, due to the different power of the two, there will be a power jump, which will cause the transmission After the additional SRS, the directly adjacent legacy SRS in the transmission time domain is distorted. Therefore, the embodiment of the present application designs the following three solutions to avoid this problem, and the network device chooses any one of the following solutions to execute:

The first type: does not trigger additional SRS and legacy SRS transmissions that are directly adjacent to each other in the time domain between the network device and the terminal device. If the two are directly adjacent to each other in the time domain, the terminal device will not send the triggered legacy SRS or the triggered additional SRS.

The second type: when the network device configures SRS parameters for the terminal device, at least one symbol is added between the additional SRS and the legacy SRS as a GP symbol, for example, one symbol is added as a GP symbol.

The third method: If the two are transmitted directly adjacent to each other in the time domain, the network device needs to configure the SRS parameters to ensure that the bandwidth of the legacy SRS and the additional SRS are the same, so as to ensure that the power of the two SRSs is the same, and no power jump occurs.

The terminal device determines whether to enable frequency hopping transmission SRS:

其中

为一个子帧中SRS符号的序号。The terminal device determines whether to enable frequency hopping transmission of the SRS according to the SRS frequency hopping bandwidth configuration b _hop indicated by the first configuration information and the SRS bandwidth B _SRS indicated by the second configuration information. The terminal device judges the magnitude relationship between b _hop and B _SRS , and if b _hop <B _SRS , enables frequency hopping transmission of SRS; if b _hop ≥ B _SRS , does not enable frequency hopping transmission of SRS. It should be noted that, regardless of whether frequency hopping transmission SRS is enabled or not, the SRS transmission count is

in

is the sequence number of the SRS symbol in a subframe.

For the situation where frequency hopping transmission SRS is enabled, the starting position of SRS frequency domain is determined according to the following formula

表示频带上可用于传输SRS的第一个子载波的位置，或者说宽带SRS 的起始子载波所在的位置。第二项

中，m_SRS，b为SRS带宽占据资源块(Resource Block，RB)的数目，

为每一个RB包含的子载波个数，因此，可得SRS 信号带宽占据子载波数为

nb为窄带SRS频域位置索引，n_b是根据n_SRS确定的。Among them, the first

Indicates the position of the first subcarrier that can be used to transmit the SRS on the frequency band, or the position of the initial subcarrier of the wideband SRS. second section

Among them, m _{SRS, b} is the number of resource blocks (Resource Block, RB) occupied by the SRS bandwidth,

is the number of subcarriers contained in each RB, therefore, the available SRS signal bandwidth occupies the number of subcarriers as

nb is the narrowband SRS frequency domain position index, and n _b is determined according to n _SRS .

The end device determines the antenna port index for switching:

The terminal device determines the antenna port index of the antenna after the terminal device performs antenna switching (hereinafter referred to as the first antenna port index) through the first parameter. The first parameter may be expressed as n _{SRS_AS} , and the name of this parameter is not limited. For example, this parameter is called SRS antenna switching transmission count.

An optional implementation manner is: according to the different antenna switching modes indicated by the fifth configuration information of the terminal device, the way the terminal device determines the first antenna port index is also different, when the fifth configuration information is a parameter indicating the 1T4R mode, and When it is turned on, the 1T4R mode is selected; when the fifth configuration information is a parameter indicating the 2T4R mode and it is turned on, the 2T4R mode is selected; otherwise, the 1T2R mode is selected. The following takes n _{SRS_AS} as an example to represent the first parameter, and a(n _{SRS_AS} ) as an example to represent the first antenna port index. According to different antenna switching modes, the specific method for determining the first antenna port index is as follows:

The first case, 1T4R mode:

In this mode,

If frequency hopping transmission SRS is not enabled (b _hop ≥ B _SRS ), then the first antenna port index a(n _{SRS_AS} ) is:

a(n _{SRS_AS} )=n _{SRS_AS} mod 4 (2)

If frequency hopping transmission SRS is enabled (b _hop <B _SRS ), the index of the first antenna port is:

Among them, n _{SRS_AS} is the first parameter; K is the number of shares divided into the frequency domain obtained by the first configuration information and the second configuration information, and is a positive integer; β is a parameter that takes 0 or 1, when the SRS signal bandwidth When the second-level bandwidth is divided into two and the third-level bandwidth is divided into two, β takes 1, otherwise it takes 0.

The second case, 2T4R mode:

First of all, it needs to be emphasized that in this mode, since there are two antennas for sending SRS, Λ terminal device antenna pairs are configured, where Λ={2 or 3}. In addition, in this mode,

If frequency hopping transmission SRS is not enabled (b _hop ≥ B _SRS ), the index of the first antenna port is:

a(n _{SRS_AS} )=n _{SRS_AS} modΛ (4)

If frequency hopping transmission SRS is enabled (b _hop <B _SRS ), the index of the first antenna port is:

Among them, n _{SRS_AS} is the first parameter; K is the number of shares divided into the frequency domain obtained by the first configuration information and the second configuration information, and is a positive integer; β is a parameter that takes 0 or 1, when the SRS signal bandwidth When the second-level bandwidth is divided into two and the third-level bandwidth is divided into two, β takes 1, otherwise it takes 0.

The third case, 1T2R mode:

In this mode,

If frequency hopping transmission SRS is not enabled (b _hop ≥ B _SRS ), the index of the first antenna port is:

a(n _{SRS_AS} )=n _{SRS_AS} mod 2 (6)

If frequency hopping transmission SRS is enabled (b _hop <B _SRS ), the index of the first antenna port is:

Among them, n _{SRS_AS} is the first parameter; K is the number of divisions in the frequency domain obtained from the first configuration information and the second configuration information, and is a positive integer; β is a preset value, for example, β is a value of 0 Or a parameter of 1, when the SRS signal bandwidth is divided into two parts in the second-level bandwidth and divided into two parts in the third-level bandwidth, β takes 1, otherwise takes 0.

个符号，根据以下方式确定所述第

个符号的天线端口索引：In another possible implementation manner, the terminal device acquires fifth configuration information; the fifth configuration information is used to indicate the antenna mode supported by the terminal device; if the antenna mode indicated by the fifth configuration information is 1T4R, and when When the terminal equipment uses frequency hopping to transmit SRS, the first

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号，根据以下方式确定所述第

个符号的天线端口索引：If the antenna mode indicated by the fifth configuration information is 1T2R, and when the terminal equipment uses frequency hopping to transmit SRS, the first

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号，根据以下方式确定所述第

个符号的天线端口索引：If the antenna mode indicated by the fifth configuration information is 2T4R, and the terminal device uses frequency hopping to transmit SRS, the first

symbol, according to the following way to determine the first

Antenna port indices of symbols:

Where Λ represents the number of antenna pairs used by the terminal equipment to transmit the SRS. The value of Λ is 2 or 3: when Λ=2, the antenna port pair is {2a(n _SRS ), 2a(n _SRS )+1}; when Λ=3, it means that the antenna port pair is {0, a (n _SRS )+1}.

配置C_SRS＝0，B_SRS＝1， m_SRS，1＝12，SRS信号带宽在第二级带宽分成的份数为N₁＝3，传输梳齿偏移

配置频域位置n_RRC＝0，配置跳频带宽b_hop＝0满足b_hop＜B_SRS，使能跳频，重复因子R＝2， SRS跳频与天线切换同时配置，保护间隔Y＝1。如图5所示，为上述例子下，终端设备传输SRS的示意图，其中Tx0、Tx1为天线。由图5可知，

取0～5时，终端设备采用跳频的方式传输SRS，根据1T2R模式下第一天线端口索引的计算公式，终端设备用同一根天线Tx0传输SRS符号；其中，

为一个子帧中SRS符号的序号。The following uses the 1T2R mode as an example to illustrate the process of step 303, the uplink bandwidth

Configure C _SRS ＝0, B _SRS ＝1, m _{SRS, 1} ＝12, the number of SRS signal bandwidth divided into the second-stage bandwidth is N ₁ ＝3, and the transmission comb offset

Configure frequency domain position n _RRC =0, configure frequency hopping bandwidth b _hop =0 to satisfy b _hop <B _SRS , enable frequency hopping, repetition factor R=2, configure SRS frequency hopping and antenna switching at the same time, and guard interval Y=1. As shown in FIG. 5 , it is a schematic diagram of a terminal device transmitting an SRS in the above example, where Tx0 and Tx1 are antennas. It can be seen from Figure 5 that,

When taking 0 to 5, the terminal device transmits SRS by frequency hopping. According to the calculation formula of the first antenna port index in 1T2R mode, the terminal device uses the same antenna Tx0 to transmit SRS symbols; where,

is the sequence number of the SRS symbol in a subframe.

In the process of frequency hopping SRS transmission, there may be a situation that all frequency hopping and antenna switching are not completed within a subframe. When frequency hopping and/or antenna switching are configured in the same subframe, if the number of SRS symbols in the configured subframe is not enough to complete all frequency hopping and/or antenna switching, in order to complete frequency hopping and/or antenna switching, it is necessary to The remaining frequency hopping and/or antenna switching are completed in subsequent subframes. However, when an SRS symbol is subsequently transmitted on a subsequent subframe, the transmission count n _SRS will be initialized to 0, which will result in frequency hopping and/or antenna switching done on the subsequent subframe being completely different from the results of the preceding subframe. The same, that is, all frequency hopping and antenna switching cannot be completed within one subframe. As shown in FIG. 6 , SRS symbols are transmitted to antennas Tx0 and Tx1 in two subframes.

In order to solve the problem that all frequency hopping and antenna switching are not completed in one subframe during the process of frequency hopping SRS transmission, the embodiment of this application provides the following three methods:

The first method is to add first indication information in radio resource control (radio resource control, RRC) signaling, where the first indication information is used to indicate whether n _SRSs are continuously counted. The first indication information may be carried in RRC signaling or in DCI, which will be described respectively below.

In the first case of the first method, the first indication information is carried in RRC signaling, and the name of the first indication information in RRC signaling is not limited, such as SRS-InterSubframe-Successive :

For example, when the first indication information is set to "on (on)", the terminal device is instructed to store the last n _SRS values of the aperiodic transmission SRS symbols triggered by the unfinished SRS antenna switching; and, in the next subframe When continuing to transmit SRS symbols aperiodically, n _SRS will continue to increase accumulatively on this basis.

When the first indication information is set to "off", no matter whether frequency hopping or antenna switching is completed for the aperiodic SRS transmission, n _SRS will return to 0 when the aperiodic SRS transmission is triggered next time.

In the second case of the first method, the first indication information is added to the DCI signaling, and the terminal device performs one of the following two actions according to the first indication information:

Behavior 1: Instruct the terminal device to store the last n _SRS value of the aperiodically transmitted SRS symbols triggered by the unfinished SRS antenna switching; when continuing to aperiodically transmit SRS symbols in the next subframe, n _SRS will continue to increase on this basis .

Behavior 2: Regardless of whether frequency hopping or antenna switching is completed for the aperiodic SRS symbol transmission this time, n _SRS will return to 0 when the next aperiodic SRS symbol transmission is triggered.

举例来说， p_set1＝{0，1}，p_set2＝{0，1，2}等。该方法包括以下三步：The second method is to add second indication information in RRC signaling or DCI signaling. The second indication information is used to indicate whether n _SRS counts continuously, and increase the high-level parameter multiple antenna port sets

For example, p _set1 ={0, 1}, p _set2 ={0, 1, 2} and so on. The method consists of the following three steps:

Step 1: The network device selects the antenna port set p _set in this aperiodic transmission SRS symbol according to the capability information reported by the terminal device.

Step 2: When the terminal device performs antenna switching for aperiodically transmitting SRS symbols, the antenna port p∈pset is satisfied.

Step 3: Repeat, frequency hopping and antenna switching of all antennas are realized by triggering multiple aperiodic transmissions of SRS symbols and selecting different antenna port sets for each transmission of SRS symbols.

The third method adopts the method of multi-shot (multi-shot), which is triggered once and ends automatically after completing the transmission of all OFDM symbols, including the following two steps:

Step 1: The network device configures the number of SRS symbols for transmission to the terminal device.

Step 2: The network device triggers or activates the terminal device to transmit SRS symbols through DCI signaling or media access control (media access control, MAC) control element (CE) signaling, and performs repetition, frequency hopping, and antenna switching.

After the terminal equipment completes the repetition and frequency hopping of all antennas, the transmission of the SRS symbol ends. The difference from the semi-static SRS transmission in NR is that the MAC CE does not need to be used again to terminate the transmission of the SRS symbol.

According to the above embodiments, this embodiment of the present application provides a signal transmission method, which can be expressed as:

The terminal acquires first information, where the first information is used to indicate SRS antenna switching;

The terminal performs SRS antenna switching according to the first information;

Wherein, the SRS antenna switching satisfies:

或者，

or,

或者，

or,

个SRS符号上发送SRS所使用天线的天线端口索引，

R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

表示SRS的符号数(例如可以通过SRS的起始符号和SRS的传输持续时间获得，可选的，SRS的传输持续时间不包括保护符号guard symbol)，m_SRS，b表示第一UE级带宽，b＝0，12，3，

表示第二UE级带宽，B_SRS∈{0，1，2，3}。其中b可以是网络设备配置给终端的。可选的，b也可以表示为b_hop，由网络设备配置给终端。例如：网络设备通过RRC信令将b或者b_hop，发送给终端。Λ表示终端设备用于传输所述SRS的天线对数。例如，Λ的取值可以是2，或者3。作为一种可选的理解，Λ的取值为2时，对应的天线对数为{2a(n_SRS)，2a(n_SRS)+1}Among them, a(n _SRS ) means the first

The antenna port index of the antenna used to transmit SRS on each SRS symbol,

R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

Represents the number of symbols of the SRS (for example, it can be obtained through the start symbol of the SRS and the transmission duration of the SRS. Optionally, the transmission duration of the SRS does not include the guard symbol), m _{SRS, b} represents the first UE level bandwidth, b=0, 12, 3,

Denotes the second UE level bandwidth, B _SRS ∈ {0, 1, 2, 3}. Where b may be configured for the terminal by the network device. Optionally, b can also be expressed as b _hop , which is configured to the terminal by the network device. For example: the network device sends b or b _hop to the terminal through RRC signaling. Λ represents the number of antenna pairs used by the terminal device to transmit the SRS. For example, the value of Λ can be 2 or 3. As an optional understanding, when the value of Λ is 2, the corresponding number of antenna pairs is {2a(n _SRS ), 2a(n _SRS )+1}

作为一种可选的设计，当终端设备的天线模式为1T2R时，可以采用

作为一种可选的设计，当终端设备的天线模式为2T4R时，可以采用

其中，终端设备的天线模式可以由网络设备配置。例如，网络设备通过高层RRC信令将终端设备的天线模式配置为1T2R，1T4R，或者2T4R。; As another optional understanding, when the value of Λ is 3, the corresponding number of antenna pairs is {0, a(n _SRS )+1}. As an optional design, when the antenna mode of the terminal equipment is 1T4R, you can use

As an optional design, when the antenna mode of the terminal equipment is 1T2R, you can use

As an optional design, when the antenna mode of the terminal equipment is 2T4R, you can use

Wherein, the antenna mode of the terminal device may be configured by the network device. For example, the network device configures the antenna mode of the terminal device as 1T2R, 1T4R, or 2T4R through high-layer RRC signaling.

Wherein, the terminal performing SRS antenna switching may be understood as the terminal determining the antenna port for sending the SRS.

For other optional designs and descriptions, reference may be made to relevant content in the foregoing embodiments, and details are not repeated here.

According to the above embodiments, from the network device side, the embodiment of the present application provides a signal transmission method that can be expressed as:

The network device sends first information to the terminal device, where the first information is used to instruct the terminal device to perform SRS antenna switching.

Wherein, the SRS antenna switching satisfies:

或者，

or,

或者，

or,

Optionally, the network device may generate the first information. Optionally, the network device may receive the SRS based on the antenna port of the terminal indicated by the above formula.

Regarding the above formulas, optional designs, etc., reference may be made to the descriptions of the above embodiments.

In order to implement the method in the embodiment of the present application, the present application also provides a terminal device, which is used for:

Acquire first information, where the first information is used to indicate SRS antenna switching;

performing SRS antenna switching according to the first information;

Wherein, the SRS antenna switching satisfies:

或者，

or,

或者，

or,

个SRS符号上发送SRS所使用天线的天线端口索引，

R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

表示SRS的符号数(例如可以通过SRS的起始符号和SRS的传输持续时间获得，可选的，SRS的传输持续时间不包括保护符号guard symbol)，m_SRS，b表示第一UE级带宽，b＝0，12，3，

表示第二UE级带宽，B_SRS∈{0，1，2，3}。其中b可以是网络设备配置给终端的。可选的，b也可以表示为b_hop，由网络设备配置给终端。例如：网络设备通过RRC信令将b或者b_hop，发送给终端。Λ表示终端设备用于传输所述SRS的天线对数。例如，Λ的取值可以是2，或者3。作为一种可选的理解，Λ的取值为2时，对应的天线对数为{2a(n_SRS)，2a(n_SRS)+1}Among them, a(n _SRS ) means the first

The antenna port index of the antenna used to transmit SRS on each SRS symbol,

R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

Represents the number of symbols of the SRS (for example, it can be obtained through the start symbol of the SRS and the transmission duration of the SRS. Optionally, the transmission duration of the SRS does not include the guard symbol), m _{SRS, b} represents the first UE level bandwidth, b=0, 12, 3,

Denotes the second UE level bandwidth, B _SRS ∈ {0, 1, 2, 3}. Where b may be configured for the terminal by the network device. Optionally, b can also be expressed as b _hop , which is configured to the terminal by the network device. For example: the network device sends b or b _hop to the terminal through RRC signaling. Λ represents the number of antenna pairs used by the terminal device to transmit the SRS. For example, the value of Λ can be 2 or 3. As an optional understanding, when the value of Λ is 2, the corresponding number of antenna pairs is {2a(n _SRS ), 2a(n _SRS )+1}

作为一种可选的设计，当终端设备的天线模式为1T2R时，可以采用

作为一种可选的设计，当终端设备的天线模式为2T4R时，可以采用

其中，终端设备的天线模式可以由网络设备配置。例如，网络设备通过高层RRC信令将终端设备的天线模式配置为1T2R，1T4R，或者2T4R。; As another optional understanding, when the value of Λ is 3, the corresponding number of antenna pairs is {0, a(n _SRS )+1}. As an optional design, when the antenna mode of the terminal equipment is 1T4R, you can use

As an optional design, when the antenna mode of the terminal equipment is 1T2R, you can use

As an optional design, when the antenna mode of the terminal equipment is 2T4R, you can use

Wherein, the antenna mode of the terminal device may be configured by the network device. For example, the network device configures the antenna mode of the terminal device as 1T2R, 1T4R, or 2T4R through high-layer RRC signaling.

For other optional designs and descriptions, reference may be made to relevant content in the foregoing embodiments, and details are not repeated here.

In order to implement the method in the embodiment of the present application, the present application also provides a network device, which is used for:

Sending first information to the terminal device, where the first information is used to instruct the terminal device to perform SRS antenna switching.

Wherein, the SRS antenna switching satisfies:

或者，

or,

或者，

or,

Regarding the above formulas, optional designs, etc., reference may be made to the descriptions of the above embodiments.

For the structures and components of the above-mentioned terminal device and network device, reference may be made to the description of the following embodiments.

As shown in FIG. 7 , a schematic structural diagram of a communication device is provided according to an embodiment of the present application. The communication apparatus may be used to execute the actions of the terminal device in the foregoing method embodiments, and the communication apparatus 700 includes: a transceiver unit 701 and a processing unit 702 .

When the communication device 700 executes the actions of the terminal device in the process shown in FIG. 3:

The transceiver unit 701 is configured to obtain first configuration information and second configuration information; the first configuration information is used to indicate the frequency hopping bandwidth configuration of the SRS; the second configuration information is used to indicate the sounding reference signal SRS bandwidth;

The processing unit 702 is configured to determine, according to the first configuration information and the second configuration information, that when transmitting the first SRS by frequency hopping, during the process of transmitting the first SRS, every time in the entire bandwidth allocated to the terminal device The frequency hopping transmission of the entire bandwidth is completed once, and the antenna for sending the first SRS is switched once.

In a possible implementation manner, the processing unit 702 is specifically configured to: switch the antenna for sending the first SRS every time X*R SRS symbols are transmitted by frequency hopping in the entire bandwidth allocated to the terminal device; X is When frequency hopping transmission is allocated to the entire bandwidth for frequency hopping transmission of the entire bandwidth, the number of symbols for initial frequency hopping transmission; R is an SRS symbol repetition factor.

个SRS符号，根据所述第一参数确定所述第

个SRS符号的天线端口索引；

为自然数。In a possible implementation manner, the transceiving unit 701 is further configured to: acquire third configuration information and fourth configuration information; the third configuration information is used to indicate the number of sounding reference signal SRS symbols transmitted in one subframe; The fourth configuration information is used to indicate the SRS symbol repetition factor; the processing unit 702 is further configured to: determine a first parameter according to the third configuration information and the fourth configuration information;

SRS symbol, the first parameter is determined according to the first parameter

Antenna port index of SRS symbols;

is a natural number.

个SRS符号，通过第一天线，传输所述第

个SRS符号；所述第一天线为所述第

个SRS符号的天线端口索引对应的天线。In a possible implementation manner, the processing unit 702 is further configured to: for the first

SRS symbols, through the first antenna, transmit the first

SRS symbols; the first antenna is the first

The antenna corresponding to the antenna port index of each SRS symbol.

In a possible implementation manner, the transceiver unit 701 is further configured to: receive first indication information from a network device; the first indication information is used to indicate whether the first parameter counts continuously; when the first When the indication information indicates that the first parameter counts continuously, when the first SRS is transmitted in the first subframe, determining the first parameter according to the third configuration information and the fourth configuration information includes: determining the first parameter according to the following formula Describe the first parameter:

λ为根据所述终端设备当前所使用的天线模式确定的参数，R表示所述第四配置信息，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

为所述第三配置信息，

表示向下取整运算，Δ表示所述终端设备在第二子帧中发送第二SRS的最后一个符号时，所述第一参数的取值，所述第二子帧为所述终端设备在发送所述第一子帧之前发送的最后一个子帧。Wherein, n _{SRS_AS} is the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device, R represents the fourth configuration information,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

For the third configuration information,

Indicates the rounding down operation, Δ indicates the value of the first parameter when the terminal device sends the last symbol of the second SRS in the second subframe, and the second subframe is the value of the terminal device in the second subframe The last subframe sent before the first subframe is sent.

In a possible implementation manner, the processing unit 702 is specifically configured to: determine the first parameter according to the following formula:

λ为根据所述终端设备当前所使用的天线模式确定的参数，R表示所述第四配置信息，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

为所述第三配置信息，

表示向下取整运算。Wherein, n _{SRS_AS} is the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device, R represents the fourth configuration information,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

For the third configuration information,

Indicates the rounding down operation.

When the communication device 700 executes the actions of the terminal device in the process shown in FIG. 3:

The transceiver unit 701 is configured to acquire first configuration information, second configuration information, fifth configuration information, and fourth configuration information of the first SRS, wherein the first configuration information and the second configuration information are used to determine the The first SRS performs frequency hopping configuration information, the fifth configuration information is used to determine the first SRS configuration information for antenna switching, and the fourth configuration information is used to indicate the configuration of the time domain symbols occupied by the first SRS information;

The processing unit 702 is configured to, according to the first configuration information, the second configuration information, the fifth configuration information, and the fourth configuration information, determine that when sending the first SRS, first complete the SRS frequency hopping, and then perform SRS antenna switching.

In a possible implementation manner, the transceiver unit 701 is further configured to: acquire third configuration information and eighth configuration information; the third configuration information is used to indicate that the time-domain symbol occupied by the first SRS is on a normal subframe , including at least one OFDM symbol other than the last OFDM symbol; the eighth configuration information is used to indicate the cell where the terminal device sends the first SRS; the first configuration information is used to indicate the frequency hopping of the SRS Bandwidth configuration, the second configuration information is used to indicate the terminal device level SRS bandwidth configuration; when the first configuration information is smaller than the second configuration information, the terminal device performs frequency hopping when sending the first SRS; The fifth configuration information indicates that when the terminal device enables antenna switching, the terminal device performs antenna switching when sending the first SRS.

In a possible implementation manner, the fourth configuration information is used to indicate the number of repetitions R to be repeated when the terminal device sends the SRS; the processing unit 702 is further configured to: according to the first configuration information, the When the second configuration information, the third configuration information, the fourth configuration information, and the fifth configuration information are determined to send the first SRS, the SRS repetition is completed first, then the SRS frequency hopping is completed, and finally the SRS antenna is performed. switch.

个SRS符号上发送SRS所使用天线的天线端口索引，

为自然数。In a possible implementation manner, the processing unit 702 is further configured to: determine a first parameter according to the third configuration information and the fourth configuration information;

The antenna port index of the antenna used to transmit SRS on each SRS symbol,

is a natural number.

In a possible implementation manner, the transceiving unit 701 is further configured to: receive first indication information from the network device; the first indication information is used to indicate whether the first parameter counts continuously; when the When the first indication information indicates that the first parameter counts continuously, when the transceiver unit 701 transmits the first SRS in the first subframe, the processing unit 702 is further configured to:

The first parameter is determined according to the following formula:

λ为根据所述终端设备当前所使用的天线模式确定的参数，R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

为正常子帧内传输SRS所占用的OFDM符号总数量，

表示向下取整运算，Δ表示所述终端设备在第二子帧中发送第二SRS的最后一个符号时，所述第一参数的取值，所述第二子帧为所述终端设备在发送所述第一子帧之前发送的最后一个子帧。Wherein, n _{SRS_AS} is the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device, and R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

is the total number of OFDM symbols occupied by SRS transmission in a normal subframe,

Indicates the rounding down operation, Δ indicates the value of the first parameter when the terminal device sends the last symbol of the second SRS in the second subframe, and the second subframe is the value of the terminal device in the second subframe The last subframe sent before the first subframe is sent.

In a possible implementation manner, the processing unit 702 is further configured to:

The first parameter is determined according to the following formula:

λ为根据所述终端设备当前所使用的天线模式确定的参数，R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，

为正常子帧内传输SRS所占用的OFDM符号总数量，

表示向下取整运算。Wherein, n _{SRS_AS} is the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device, and R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

the serial number of an SRS symbol in the first SRS,

is the total number of OFDM symbols occupied by SRS transmission in a normal subframe,

Indicates the rounding down operation.

In a possible implementation manner, the terminal device acquires the first frequency hopping times n _hop in the following manner:

表示配置的SRS终端设备级带宽；Wherein, n _hop is the first frequency hopping times, m _{SRS, 0} represents the configured SRS cell-level bandwidth,

Indicates the configured SRS terminal device-level bandwidth;

Or, the terminal device receives the first number of frequency hops n _hop from the network device;

Alternatively, the terminal device determines the first number of frequency hopping times according to the third configuration information, the fourth configuration information, and the fifth configuration information in the following manner:

λ为由所述第五配置信息确定的参数：当所述第二配置信息指示1T4R天线切换使能时，λ＝4；当所述第二配置信息指示2T4R或1T2R 天线切换使能时，λ＝2；

为所述第三配置信息；R为所述第四配置信息。The first frequency hopping times

λ is a parameter determined by the fifth configuration information: when the second configuration information indicates that 1T4R antenna switching is enabled, λ=4; when the second configuration information indicates that 2T4R or 1T2R antenna switching is enabled, λ = 2;

is the third configuration information; R is the fourth configuration information.

In a possible implementation manner, the processing unit 702 calculates the first parameter according to the first frequency hopping times in the following manner:

R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，n_hop表示所述第一跳频次数，

表示向下取整运算；Wherein, n _{SRS_AS} is the first parameter,

R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

The serial number of an SRS symbol in the first SRS, n _hop represents the first frequency hopping times,

Indicates the rounding down operation;

个SRS符号上发送SRS所使用天线的天线端口索引，

为自然数。According to the first parameter, determine the

The antenna port index of the antenna used to transmit SRS on each SRS symbol,

is a natural number.

In another possible implementation manner, the processing unit 702 is further configured: the terminal device obtains the first frequency hopping times n _hop in the following manner:

表示第二SRS终端设备级带宽，B_SRS∈{0，1，2，3}。其中b可以是所述网络设备高层参数配置的，可选的，b也可以表示为b_hop，由高层RRC信令配置。Wherein, n _hop is the first frequency hopping times, m _{SRS, b} represents the first SRS terminal equipment-level bandwidth, b=0, 1, 2, 3,

Denotes the second SRS terminal device-level bandwidth, B _SRS ∈ {0, 1, 2, 3}. Wherein, b may be configured by a high-layer parameter of the network device, and optionally, b may also be expressed as b _hop , which is configured by high-layer RRC signaling.

In a possible implementation manner, the method further includes: the terminal device receiving a first frequency hop count n _hop from the network device.

或

其中

和

分别表示向上和向下取整运算。

为所述第三配置信息；R为所述第四配置信息。λ为由所述第五配置信息确定的参数，例如，当所述第二配置信息指示1T4R天线切换使能时，λ＝4；当所述第二配置信息指示2T4R或1T2R天线切换使能时，λ＝2，或者λ根据UE上报的天线能力信息确定，In a possible implementation manner, the method further includes: the terminal device determines the first hop according to the third configuration information, the fourth configuration information, and the fifth configuration information in the following manner: Frequency times: the first frequency hopping times

or

in

and

Represents up and down rounding operations, respectively.

is the third configuration information; R is the fourth configuration information. λ is a parameter determined by the fifth configuration information, for example, when the second configuration information indicates that 1T4R antenna switching is enabled, λ=4; when the second configuration information indicates that 2T4R or 1T2R antenna switching is enabled , λ=2, or λ is determined according to the antenna capability information reported by the UE,

In a possible implementation manner, the method further includes: the terminal device calculates the first parameter according to the first frequency hopping times in the following manner:

or,

R表示所述终端设备发送SRS时进行重复的重复次数，

表示所述第一SRS的第

个SRS符号在所述第一SRS中的序号，n_hop表示所述第一跳频次数，

和

分别表示向上和向下取整运算；所述终端设备根据所述第一参数，确定在第

个SRS符号上发送SRS所使用天线的天线端口索引，

为自然数。Wherein, n _{SRS_AS} is the first parameter,

R represents the number of repetitions performed when the terminal device sends the SRS,

Indicates the first SRS of the first

The serial number of an SRS symbol in the first SRS, n _hop represents the first frequency hopping times,

and

represent up and down rounding operations respectively; the terminal device determines the first parameter according to the first parameter

The antenna port index of the antenna used to transmit SRS on each SRS symbol,

is a natural number.

In a possible implementation manner, the processing unit 702 is further configured to:

个符号，根据以下方式确定所述第

个符号的天线端口索引：Acquiring fifth configuration information; the fifth configuration information is used to indicate the antenna mode supported by the terminal device; if the antenna mode indicated by the fifth configuration information is 1T4R, and when the terminal device adopts hopping When transmitting the first SRS in frequency mode, for the first SRS of the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号的天线端口索引，n_{SRS_AS}为所述第一参数； K为频域上分成的份数由所述第一配置信息和第二配置信息获得，K为正整数；β为预设值；Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols, n _{SRS_AS} is the first parameter; K is the number of divisions in the frequency domain obtained from the first configuration information and the second configuration information, K is a positive integer; β is a preset value;

个符号，根据以下方式确定所述第

个符号的天线端口索引：Or, if the antenna mode indicated by the fifth configuration information is 1T4R, and when the terminal device does not transmit the SRS by frequency hopping, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

a(n _{SRS_AS} )=n _{SRS_AS} mod 4

个符号的天线端口索引，n_{SRS_AS}为所述第一参数。Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols, n _{SRS_AS} is the first parameter.

In a possible implementation manner, the processing unit 702 is further configured to:

个符号，根据以下方式确定所述第

个符号的天线端口索引：If the antenna mode indicated by the fifth configuration information is 2T4R, and when the terminal device uses frequency hopping to transmit the first SRS, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号的天线端口索引，Λ表示终端设备用于传输所述第一SRS的天线对数，n_{SRS_AS}为所述第一参数； K为频域上分成的份数由所述第一配置信息和第二配置信息获得，K为正整数；β为预设值；Among them, a(n _{SRS_AS} ) represents the first

Antenna port index of symbols, Λ represents the number of antenna pairs used by the terminal device to transmit the first SRS, n _{SRS_AS} is the first parameter; K is the number of shares divided in the frequency domain by the first configuration information and The second configuration information is obtained, K is a positive integer; β is a preset value;

个符号，根据以下方式确定所述第

个符号的天线端口索引：Or, if the antenna mode indicated by the fifth configuration information is 2T4R, and when the terminal device does not transmit the SRS by frequency hopping, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

a(n _{SRS_AS} )=n _{SRS_AS} modΛ

个符号的天线端口索引，n_{SRS_AS}为所述第一参数，Λ表示终端设备用于传输所述第一SRS的天线对数。Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols, n _{SRS_AS} is the first parameter, and Λ represents the number of antenna pairs used by the terminal device to transmit the first SRS.

个符号，根据以下方式确定所述第

个符号的天线端口索引：In a possible implementation manner, the processing unit 702 is further configured to: if the antenna mode indicated by the fifth configuration information is 1T2R, and when the terminal device transmits the first SRS in a frequency hopping manner , for the first SRS of the first

symbol, according to the following way to determine the first

Antenna port indices of symbols:

个符号的天线端口索引；n_{SRS_AS}为所述第一参数； K为频域上分成的份数由所述第一配置信息和第二配置信息获得，K为正整数；β为预设值；Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols; n _{SRS_AS} is the first parameter; K is the number of divisions in the frequency domain obtained from the first configuration information and the second configuration information, K is a positive integer; β is a preset value;

个符号，根据以下方式确定所述第

个符号的天线端口索引：Or, if the antenna mode indicated by the fifth configuration information is 1T2R, and when the terminal device does not transmit the SRS by frequency hopping, the first SRS for the first SRS

symbol, according to the following way to determine the first

Antenna port indices of symbols:

a(n _{SRS_AS} )=n _{SRS_AS} mod 2

个符号的天线端口索引，n_{SRS_AS}为所述第一参数。Among them, a(n _{SRS_AS} ) represents the first

The antenna port index of symbols, n _{SRS_AS} is the first parameter.

In a possible implementation manner, the transceiving unit 701 is further configured to: the terminal device acquires sixth configuration information, where the sixth configuration information is used to indicate that within a subframe, all SRSs included in the first SRS The number of each guard interval GP symbol in a symbol, the position of each GP symbol, and the length of each GP symbol; or, the terminal device acquires seventh configuration information, where the seventh configuration information is a bitmap, and the bit Each bit in the bitmap uniquely corresponds to a symbol in one subframe; when the value of a bit in the bitmap is the first value, it indicates that the symbol corresponding to the bit is an SRS symbol.

In a possible implementation manner, the transceiver unit 701 is further configured to: the terminal device receives a transmission power control TPC from the network device; the processing unit 702 is further configured to: when the first SRS is a traditional When SRS, determine the transmission power of the first SRS according to the TPC; or, when the first SRS is an additional SRS, determine the transmission power of the first SRS according to the TPC; or, when the first SRS is an additional SRS, determine the transmission power of the first SRS according to the TPC; When an SRS is a traditional SRS or an additional SRS, determine the transmission power of the first SRS according to the TPC; and transmit the first SRS by using the transmission power.

As shown in FIG. 8 , it is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device shown in FIG. 8 may be an implementation manner of a hardware circuit of the communication device shown in FIG. 7 . The communication device may be applicable to the flow chart shown in FIG. 3 to execute the functions of the terminal device in the foregoing method embodiments. For ease of illustration, FIG. 8 only shows the main components of the communication device. Optionally, the communication device may be a terminal device, or a device in a terminal device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may also include other circuit structures and/or discrete devices. Optionally, taking the communication device as a terminal device as an example, as shown in FIG. The processor 801 is mainly used to process communication protocols and communication data, control the entire wireless communication device, execute software programs, and process data of the software programs, for example, to support the wireless communication device to execute the methods described in the above method embodiments. action etc. The memory 802 is mainly used to store software programs and data. The transceiver 803 is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals. The antenna 804 is mainly used for sending and receiving radio frequency signals in the form of electromagnetic waves. The input and output device 805, such as a touch screen, a display screen, and a keyboard, is mainly used to receive data input by the user and output data to the user.

For the functions of the communication device 800 shown in FIG. 8 , specific reference may be made to the description in the process shown in FIG. 3 , which will not be repeated here.

As shown in FIG. 9 , it is a schematic structural diagram of a communication device provided in the embodiment of the present application.

When the communication device 900 executes the actions of the network equipment in the process shown in FIG. 3:

A transceiver unit, configured to send first configuration information and second configuration information to the terminal device; the first configuration information is used to indicate the SRS frequency hopping bandwidth configuration; the second configuration information is used to indicate the terminal device level SRS bandwidth configuration ; Receive the first SRS from the terminal device; when the terminal device transmits the first SRS by frequency hopping according to the first configuration information and the second configuration information, every time frequency hopping is used to affect the entire cell-level SRS bandwidth When one detection is completed, the antenna for sending the first SRS is switched once.

In a possible implementation manner, the transceiver unit is further configured to: send a transmission power control TPC to the terminal device; the TPC is used to indicate: the first SRS and the second SRS to be sent by the terminal device Between, at least one guard interval GP symbol is included; when the first SRS is a traditional SRS, the second SRS is an additional SRS; or, when the first SRS is an additional SRS, the second SRS is Traditional SRS.

In a possible implementation manner, the transceiver unit is further configured to: send a transmission power control TPC to the terminal device; the TPC is used to indicate: when the first SRS symbol of the first SRS matches the terminal device When the third SRS symbols in the third SRS to be sent are adjacent, the terminal device transmits the first SRS and the third SRS with the same bandwidth; when the first SRS is a traditional SRS, the The third SRS is an additional SRS; or, when the first SRS is an additional SRS, the third SRS is a conventional SRS.

As shown in FIG. 10 , it is a schematic structural diagram of a communication device provided in an embodiment of the present application. The communication device shown in FIG. 10 may be a hardware circuit implementation manner of the communication device shown in FIG. 9 . The communication device may be applicable to the flow chart shown in FIG. 3 to execute the functions of the network device in the foregoing method embodiments. For ease of illustration, FIG. 10 only shows the main components of the communication device. Optionally, the communication device may be a network device, or a device in the network device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may also include other circuit structures and/or discrete devices. Optionally, taking the communication device as a network device as an example, as shown in FIG. 8 , the communication device 1000 includes a processor 1001, a memory 1002, a transceiver 1003, an antenna 1004, and the like.

For the functions of the communication device 1000 shown in FIG. 10 , specific reference may be made to the description in the flow shown in FIG. 3 , which will not be repeated here.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

Apparently, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (20)

1. A signal transmission method, comprising:

the terminal equipment acquires first configuration information and second configuration information; the first configuration information is used for indicating frequency hopping bandwidth configuration of a Sounding Reference Signal (SRS); the second configuration information is used for indicating terminal equipment level SRS bandwidth configuration;

when the terminal equipment determines frequency hopping transmission of a first SRS according to the first configuration information and the second configuration information, in the process of transmitting the first SRS, switching an antenna for sending the first SRS once every time when the frequency hopping is used to complete once detection on the whole cell level SRS bandwidth;

the method further comprises the following steps:

the terminal equipment acquires third configuration information and fourth configuration information; the third configuration information is used for indicating the number of SRS symbols transmitted in one subframe; the fourth configuration information is used for indicating SRS symbol repetition factors;

the terminal equipment determines a first parameter according to the third configuration information and the fourth configuration information;

a second for the first SRS

An SRS symbol, the terminal equipment determines the second parameter according to the first parameter

Antenna port indices of individual SRS symbols;

is a natural number;

the determining, by the terminal device, a first parameter according to the third configuration information and the fourth configuration information includes:

the terminal device determines the first parameter according to the following formula:

wherein n is _{SRS_AS} λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents the fourth configuration information,

a second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

in order to be able to use the third configuration information,

represents a rounding down operation;

or,

the method further comprises the following steps:

the terminal equipment receives first indication information from network equipment; the first indication information is used for indicating whether the first parameter is continuously counted;

when the first indication information indicates that the first parameter is continuously counted and the terminal device transmits the first SRS in a first subframe, the terminal device determines a first parameter according to the third configuration information and the fourth configuration information, including:

the terminal device determines the first parameter according to the following formula:

wherein n is _{SRS_AS} λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents the fourth configuration information,

a second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

in order to be said third configuration information,

denotes a rounding-down operation, Δ denotes a last symbol of the terminal device transmitting the second SRS in the second subframeAnd when the number is the first parameter, the second subframe is the last subframe sent by the terminal equipment before the first subframe is sent.

2. The method of claim 1, wherein the switching an antenna that transmits the first SRS once every time sounding is completed for an entire cell-level SRS bandwidth using frequency hopping comprises:

switching the antenna transmitting the first SRS once every time X R SRS symbols are frequency-hopped transmitted in the whole bandwidth allocated to the terminal equipment; x is the minimum number of SRS symbols required when the first SRS is used for completing the detection of the whole cell level SRS bandwidth through frequency hopping; r is SRS symbol repetition factor.

3. The method of claim 1, wherein the method further comprises:

for the said first

An SRS symbol, the terminal device transmitting the first through the first antenna

A plurality of SRS symbols; the first antenna is the second antenna

The antenna port index of each SRS symbol corresponds to an antenna.

4. A signal transmission method, comprising:

the method comprises the steps that terminal equipment obtains first configuration information, second configuration information, third configuration information, fourth configuration information and fifth configuration information of a first SRS, wherein the first configuration information is used for indicating frequency hopping bandwidth configuration of a sounding reference signal SRS; the second configuration information is used for indicating terminal equipment-level SRS bandwidth configuration, and the third configuration information is used for indicating the total number of time domain symbols occupied by the first SRS in a normal subframe; the fourth configuration information is used for indicating SRS symbol repetition factors; the fifth configuration information is used for the terminal equipment to determine configuration information of antenna switching of the first SRS;

the terminal equipment determines to complete SRS frequency hopping and then perform SRS antenna switching when sending a first SRS according to the first configuration information, the second configuration information, the third configuration information, the fourth configuration information and the fifth configuration information;

the method further comprises the following steps:

the terminal equipment determines a first parameter according to the third configuration information and the fourth configuration information;

the terminal equipment determines that the terminal equipment is in the second place according to the first parameter

Antenna port indices of antennas used to transmit SRS on the individual SRS symbols,

is a natural number;

the terminal equipment is according to

And R, R represents the fourth configuration information, determines a first parameter, and comprises:

the terminal device determines the first parameter according to the following formula:

wherein n is _{SRS_AS} In order to be able to determine the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device,

a second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

the total number of OFDM symbols occupied for transmitting SRS in the normal subframe,

represents a rounding down operation;

or,

the method further comprises the following steps:

the terminal equipment receives first indication information from network equipment; the first indication information is used for indicating whether the first parameter is continuously counted;

when the first indication information indicates that the first parameter is continuously counted and the terminal device transmits the first SRS in a first subframe, the terminal device determines a first parameter according to the third configuration information and the fourth configuration information, including:

the terminal device determines the first parameter according to the following formula:

wherein n is _{SRS_AS} In order to be able to determine the first parameter,

λ is a parameter determined according to the antenna mode currently used by the terminal device, R represents the number of repetitions of the terminal device to repeat when transmitting SRS,

a second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

the total number of OFDM symbols occupied for transmitting SRS in the normal subframe,

and indicating a rounding-down operation, wherein Δ indicates a value of the first parameter when the terminal device sends a last symbol of a second SRS in a second subframe, and the second subframe is a last subframe sent by the terminal device before the first subframe is sent.

5. The method of claim 4, further comprising:

the terminal equipment acquires eighth configuration information; the eighth configuration information is used for indicating the bandwidth configuration of the cell-level SRS;

and when the first configuration information is smaller than the second configuration information, the terminal equipment performs frequency hopping when transmitting the first SRS.

6. The method of claim 4, further comprising:

the fourth configuration information is used for indicating the number of times of repetition R repeated when the terminal equipment sends the SRS;

and the terminal equipment determines to complete SRS repetition, then complete SRS frequency hopping and finally perform SRS antenna switching when the first SRS is sent according to the first configuration information, the second configuration information, the third configuration information, the fourth configuration information and the fifth configuration information.

7. The method of any of claims 4-6, further comprising:

the terminal equipment acquires the first frequency hopping times n according to the following mode _hop ：

Wherein n is _hop M is the first frequency hopping number _SRS，0 Indicating the configured cell-level SRS bandwidth,

indicating the configured end-device level bandwidth;

or the terminal equipment receives the first frequency hopping times n from the network equipment _hop ；

Or, the terminal device determines the first frequency hopping number according to the third configuration information, the fourth configuration information, and the fifth configuration information in the following manner:

the first frequency hopping times

λ is a parameter determined by the fifth configuration information: λ =4 when the second configuration information indicates 1T4R antenna switching enable; when the second configuration information indicates 2T4R or 1T2R antenna switching enable,

the third configuration information; and R is the fourth configuration information.

8. The method of claim 7, wherein the method further comprises:

the terminal equipment calculates a first parameter according to the first frequency hopping times according to the following mode:

wherein n is _{SRS_AS} In order to be able to determine the first parameter,

r represents the number of repetitions of repetition performed when the terminal device transmits the SRS,

a second SRS representing the first SRS

Number of each SRS symbol in the first SRS, n _hop Is indicative of the number of said first frequency hops,

represents a rounding down operation;

the terminal equipment determines that the terminal equipment is at the second position according to the first parameter

Antenna port indices of antennas used to transmit SRS on the individual SRS symbols,

is a natural number.

9. The method of claim 4 or 8, wherein the method further comprises:

the terminal equipment acquires fifth configuration information; the fifth configuration information is used for indicating an antenna mode supported by the terminal device;

if the antenna mode indicated by the fifth configuration information is 1T4R, and when the terminal device transmits the first SRS in a frequency hopping manner, aiming at the first SRS

A symbol, the second symbol being determined according to

Antenna port index of individual symbol:

wherein, a (n) _{SRS_AS} ) Represents the first

Antenna port index of individual symbols, n _{SRS_AS} Is the first parameter; k is obtained from the first configuration information and the second configuration information, and is a positive integer; beta is a preset value;

or, if the antenna mode indicated by the fifth configuration information is 1T4R and when the terminal device does not transmit the SRS in a frequency hopping manner, the terminal device is configured to perform a second SRS transmission

A symbol, the second symbol being determined according to

Antenna port index of each symbol:

a(n _{SRS_AS} )＝n _{SRS_AS} mod 4

wherein, a (n) _{SRS_AS} ) Represents the first

Antenna port index of individual symbols, n _{SRS_AS} Is the first parameter.

10. The method of claim 9, wherein the method further comprises:

if the antenna mode indicated by the fifth configuration information is 2T4R, and when the antenna mode is the same as the second configuration informationWhen the terminal equipment transmits the first SRS in a frequency hopping mode, aiming at the second SRS

A symbol, the second symbol being determined according to

Antenna port index of each symbol:

wherein, a (n) _{SRS_AS} ) Represents the first

Antenna port index of each symbol, Λ represents the antenna pair number used by the terminal equipment for transmitting the first SRS, n _{SRS_AS} Is the first parameter; k is the number of parts divided on the frequency domain and is obtained by the first configuration information and the second configuration information, and K is a positive integer; beta is a preset value;

or, if the antenna mode indicated by the fifth configuration information is 2T4R and when the terminal device does not transmit the SRS in a frequency hopping manner, aiming at the first SRS, the terminal device transmits the SRS in a second SRS mode

A symbol, the second symbol being determined according to

Antenna port index of individual symbol:

a(n _{SRS_AS} )＝n _{SRS_AS} modΛ

wherein, a (n) _{SRS_AS} ) Represents the first

Antenna port index of individual symbols, n _{SRS_AS} And Lambda represents the logarithm of an antenna used by the terminal equipment for transmitting the first SRS.

11. The method of claim 9, wherein the method further comprises:

if the antenna mode indicated by the fifth configuration information is 1T2R, and when the terminal device transmits the first SRS in a frequency hopping manner, aiming at the first SRS

A symbol, the second symbol being determined according to

Antenna port index of individual symbol:

wherein, a (n) _{SRS_AS} ) Represents the first

An antenna port index for each symbol; n is _{SRS_AS} Is the first parameter; k is obtained from the first configuration information and the second configuration information, and is a positive integer; beta is a preset value;

or, if the antenna mode indicated by the fifth configuration information is 1T2R and when the terminal device does not transmit the SRS in a frequency hopping manner, aiming at the first SRS, the terminal device transmits the SRS in a first SRS mode

A symbol, the first symbol being determined according to

Antenna port index of individual symbol:

a(n _{SRS_AS} )＝n _{SRS_AS} mod 2

wherein, a (n) _{SRS_AS} ) Represents the first

Antenna port index of symbol, n _{SRS_AS} Is the first parameter.

12. The method of any of claims 4-6, further comprising:

the terminal device obtains sixth configuration information, where the sixth configuration information is used to indicate, in one subframe, the number of GP symbols in each guard interval in all SRS symbols included in the first SRS, the position of each GP symbol, and the length of each GP symbol;

or the terminal device obtains seventh configuration information, where the seventh configuration information is a bit map, and each bit in the bit map uniquely corresponds to one symbol in one subframe; and when the value of one bit in the bitmap is a first value, the symbol corresponding to the bit is an SRS symbol.

13. The method of any of claims 4-6, further comprising:

the terminal equipment receives Transmission Power Control (TPC) from network equipment;

when the first SRS is a traditional SRS, the terminal equipment determines the transmission power of the first SRS according to the TPC;

or, when the first SRS is an additional SRS, the terminal device determines the transmission power of the first SRS according to the TPC;

or when the first SRS is a traditional SRS or an additional SRS, the terminal equipment determines the transmission power of the first SRS according to the TPC;

and the terminal equipment transmits the first SRS by adopting the transmission power.

14. A signal transmission method, comprising:

the network equipment sends the first configuration information and the second configuration information to the terminal equipment; the first configuration information is used for indicating frequency hopping bandwidth configuration of an SRS; the second configuration information is used for indicating terminal equipment level SRS bandwidth configuration;

the network equipment receives a first SRS from terminal equipment; when the terminal equipment transmits the first SRS in a frequency hopping manner according to the first configuration information and the second configuration information, switching an antenna for transmitting the first SRS once when the whole cell-level SRS bandwidth is detected once by using the frequency hopping;

wherein the first SRS is

The antenna port index of each SRS symbol is determined according to a first parameter,

the first parameter is determined according to third configuration information and fourth configuration information, and the third configuration information is used for indicating the number of SRS symbols transmitted in one subframe; the fourth configuration information is used for indicating SRS symbol repetition factors; the formula for determining the first parameter is:

wherein n is _{SRS_AS} λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents the fourth configuration information,

second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

in order to be able to use the third configuration information,

represents a rounding down operation;

or,

the network equipment sends first indication information to the terminal equipment; the first indication information is used for indicating whether the first parameter is continuously counted;

when the first indication information indicates that the first parameter is continuously counted and the terminal device transmits the first SRS in a first subframe, a formula for determining the first parameter is as follows:

wherein n is _{SRS_AS} λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents the fourth configuration information,

a second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

in order to be said third configuration information,

indicating a rounding-down operation, Δ indicating a value of the first parameter when the terminal device transmits a last symbol of a second SRS in a second subframe, where the second subframe is a value of the terminal device transmitting the last symbol of the second SRSA last subframe transmitted prior to the first subframe.

15. A signal transmission apparatus, comprising:

the receiving and sending unit is used for acquiring first configuration information and second configuration information; the first configuration information is used for indicating frequency hopping bandwidth configuration of an SRS; the second configuration information is used for indicating Sounding Reference Signal (SRS) bandwidth;

a processing unit, configured to switch an antenna for sending a first SRS once every time when a whole cell-level SRS bandwidth is probed once using frequency hopping in a process of transmitting the first SRS when determining that the first SRS is transmitted by frequency hopping according to the first configuration information and the second configuration information;

the transceiver unit is further configured to:

acquiring third configuration information and fourth configuration information; the third configuration information is used for indicating the number of Sounding Reference Signal (SRS) symbols transmitted in one subframe; the fourth configuration information is used for indicating SRS symbol repetition factors;

the processing unit is further to:

determining a first parameter according to the third configuration information and the fourth configuration information;

a second for the first SRS

A SRS symbol for determining the first parameter based on the first parameter

Antenna port indices of individual SRS symbols;

is a natural number;

the transceiver unit is further configured to:

receiving first indication information from a network device; the first indication information is used for indicating whether the first parameter is continuously counted;

when the first indication information indicates that the first parameter is continuously counted and the first SRS is transmitted in a first subframe, determining a first parameter according to the third configuration information and the fourth configuration information, including:

determining the first parameter according to the following formula:

wherein n is _{SRS_AS} In order to be able to determine the first parameter,

λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents the fourth configuration information,

a second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

in order to be able to use the third configuration information,

indicating a rounding-down operation, wherein Δ indicates a value of the first parameter when the terminal device sends a last symbol of a second SRS in a second subframe, and the second subframe is a last subframe sent by the terminal device before the first subframe is sent;

or,

the processing unit is specifically configured to:

determining the first parameter according to the following formula:

wherein n is _{SRS_AS} In order to be able to determine the first parameter,

λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents the fourth configuration information,

a second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

in order to be able to use the third configuration information,

indicating a rounding down operation.

16. The apparatus as recited in claim 15, said processing unit to:

switching the antenna for transmitting the first SRS once every time X R SRS symbols are frequency-hopped and transmitted in the whole bandwidth allocated to the terminal equipment; x is the number of symbols of the initial frequency hopping transmission when the frequency hopping transmission is distributed to the frequency hopping transmission in the whole bandwidth and the frequency hopping transmission is carried out on the whole bandwidth; r is SRS symbol repetition factor.

17. The apparatus as recited in claim 15, said processing unit to further:

for the second part

A first SRS symbol for transmitting the first SRS symbol via a first antenna

A plurality of SRS symbols; the first antenna is the second

The antenna port index of each SRS symbol corresponds to an antenna.

18. A signal transmission apparatus, comprising:

a transceiving unit, configured to acquire first configuration information, second configuration information, third configuration information, fifth configuration information, and fourth configuration information of a first SRS, where the first configuration information and the second configuration information are the configuration information used to determine that the first SRS performs frequency hopping, the fifth configuration information is used to determine that the first SRS performs antenna switching, the fourth configuration information is used to indicate an SRS symbol repetition factor, and the third configuration information is used to indicate a total number of time domain symbols occupied by the first SRS in a normal subframe;

a processing unit, configured to, when determining to send a first SRS according to the first configuration information, the second configuration information, the fifth configuration information, and the fourth configuration information, complete SRS frequency hopping first, and then perform SRS antenna switching;

the fourth configuration information is specifically used for indicating a repetition number R of repetitions when the terminal device transmits the SRS; the processing unit is further to: according to the first configuration information, the second configuration information, the third configuration information, the fourth configuration information and the fifth configuration information, when the first SRS is determined to be sent, SRS repetition is firstly completed, then SRS frequency hopping is completed, and finally SRS antenna switching is carried out;

the processing unit is further to: determining a first parameter according to the third configuration information and the fourth configuration information; according to the first parameter, determining at the second

An SRS symbolThe antenna port index of the antenna used to transmit the SRS is numbered,

is a natural number;

the processing unit is specifically configured to: determining the first parameter according to the following formula:

wherein n is _{SRS_AS} Is a function of the first parameter and is,

λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents fourth configuration information,

second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

represents the third configuration information of the second network device,

represents a rounding down operation;

or,

the transceiver unit is further configured to: receiving first indication information from a network device; the first indication information is used for indicating whether the first parameter is continuously counted;

when the first indication information indicates that the first parameter is continuously counted and the terminal device transmits the first SRS in a first subframe, the processing unit is specifically configured to: determining the first parameter according to the following formula:

wherein n is _{SRS_AS} In order to be able to determine the first parameter,

λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents the fourth configuration information,

second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

represents the third configuration information of the second network device,

and indicating a rounding-down operation, wherein Δ indicates a value of the first parameter when the terminal device sends a last symbol of a second SRS in a second subframe, and the second subframe is a last subframe sent by the terminal device before sending the first subframe.

19. The apparatus of claim 18, wherein the transceiver unit is further configured to:

acquiring eighth configuration information; the third configuration information is specifically used to indicate that a time domain symbol occupied by the first SRS is on a normal subframe, and includes at least one OFDM symbol other than a last OFDM symbol; the eighth configuration information is used for indicating a cell of the terminal device to transmit the first SRS;

the first configuration information is used for indicating frequency hopping bandwidth configuration of an SRS, and the second configuration information is used for indicating terminal equipment level SRS bandwidth configuration;

when the first configuration information is smaller than the second configuration information, carrying out frequency hopping when the first SRS is sent;

and when the fifth configuration information indicates that the terminal equipment enables antenna switching, antenna switching is performed when the first SRS is sent.

20. A signal transmission apparatus, comprising:

the receiving and sending unit is used for sending the first configuration information and the second configuration information to the terminal equipment; the first configuration information is used for indicating frequency hopping bandwidth configuration of an SRS; the second configuration information is used for indicating terminal equipment level SRS bandwidth configuration;

and for receiving a first SRS from the terminal device; when the terminal equipment transmits the first SRS in a frequency hopping manner according to the first configuration information and the second configuration information, switching an antenna for transmitting the first SRS once when the whole cell-level SRS bandwidth is detected once by using the frequency hopping manner;

wherein the first SRS is

The antenna port index of each SRS symbol is determined according to the first parameter,

the first parameter is determined according to third configuration information and fourth configuration information, and the third configuration information is used for indicating the number of SRS symbols transmitted in one subframe; the fourth configuration information is used for indicating SRS symbol repetition factors; the formula for determining the first parameter is:

wherein n is _{SRS_AS} Is that it isA first parameter, λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents the fourth configuration information,

a second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

in order to be able to use the third configuration information,

represents a rounding down operation;

or,

the network equipment sends first indication information to the terminal equipment; the first indication information is used for indicating whether the first parameter is continuously counted;

when the first indication information indicates that the first parameter is continuously counted and the terminal device transmits the first SRS in a first subframe, a formula for determining the first parameter is:

wherein n is _{SRS_AS} λ is a parameter determined according to an antenna mode currently used by the terminal device, R represents the fourth configuration information,

a second SRS representing the first SRS

A sequence number of each SRS symbol in the first SRS,

in order to be able to use the third configuration information,

and indicating a rounding-down operation, wherein Δ indicates a value of the first parameter when the terminal device sends a last symbol of a second SRS in a second subframe, and the second subframe is a last subframe sent by the terminal device before sending the first subframe.

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