CN111436127A - A method and device for sending a reference signal - Google Patents

Abstract

The present application provides a method and apparatus for sending a reference signal. According to the method, the first terminal device can generate a reference signal according to a first parameter, wherein the first parameter is used to generate the sequence of the reference signal, and the first parameter can be determined according to a second parameter, the second parameter includes Information identifying the transmission link and/or transmission resource information. Thereafter, the first terminal device may transmit the reference signal. Using the above method, the first terminal device can generate a reference signal according to the information for identifying the transmission link and/or the transmission resource information, so as to reduce signal interference when sending the reference signal.

Description

A method and device for sending a reference signal

technical field

The present application relates to the field of mobile communication technologies, and in particular, to a method and apparatus for sending a reference signal.

Background technique

3GPP is researching low-latency, high-reliability transmission technology in New Radio (NR) communication technology for emerging application scenarios and brick carving requirements such as autonomous driving, industrial automation, virtual reality, augmented reality, etc. . To achieve high reliability of the entire transmission, it is necessary to support both high-reliability transmission of control information and high-reliability transmission of data. For example, in terms of delay, the end-to-end transmission delay should not exceed 3ms, or the maximum end-to-end delay should be 10ms. In terms of reliability, 99.999% or 99.9999% of transmission is required. Therefore, how to achieve low-latency and highly reliable transmission is a key technology in 5G. In order to realize wireless transmission with high reliability and low realization, it is necessary to solve the problem of reference signal transmission in an interference environment. If there is interference between the transmitted reference signals, it will affect the reception and detection of the corresponding signals, and it is difficult to ensure the correctness of a single transmission, which will affect the delay and reliability of the entire system.

Therefore, in the low-latency and high-reliability transmission, how to realize the high-reliability transmission of the reference signal by NR is a problem to be solved.

SUMMARY OF THE INVENTION

The present application provides a method and apparatus for sending a reference signal, which are used to reduce the interference of the reference signal and improve the reliability of sending the reference signal.

In a first aspect, the present application provides a method for sending a reference signal, and the method can be implemented by a first terminal device. According to the method, the first terminal device can generate a reference signal according to a first parameter, wherein the first parameter is used to generate the sequence of the reference signal, and the first parameter can be determined according to a second parameter, the second parameter includes Information identifying the transmission link and/or transmission resource information. Thereafter, the first terminal device may transmit the reference signal.

Using the above method, the first terminal device can generate a reference signal according to the information for identifying the transmission link and/or the transmission resource information, so as to reduce signal interference when sending the reference signal.

In a possible design, the first terminal device may receive the first parameter from the network device. The first parameter may be determined by the network device according to the second parameter.

In a possible design, the first terminal device may also receive the second parameter from a network device, and the first terminal device determines the first parameter according to the second parameter.

In a possible design, the first terminal device may also send the first parameter and/or the second parameter to the second terminal device, so that the second terminal device determines the sequence of reference signals according to the first parameter.

In a possible design, the first parameter may include at least one of the following: a root sequence number of the sequence, a cyclic shift value of the sequence, and an orthogonal cover code of the sequence.

In a possible design, if the sequence includes a random sequence, the first parameter may further include an initial value of the sequence and/or an initial position of the sequence.

In a possible design, the information for identifying the transmission link may include at least one of the following information: the identification of the first terminal device; or the identification of the second terminal device; or the source identification; or, destination identifier; or, the joint identifier of the first terminal device and the second terminal device; or, the joint identifier of the source identifier and the destination identifier; or, the RNTI configured by the network device for the first terminal device; or, The RNTI configured by the network device for the second terminal device; or the RNTI configured by the network device for the first terminal device and the second terminal device; or the HARQ process number; transmission between the first terminal device and the second terminal device.

In a possible design, the reference signal may include at least one of the following reference signals: a demodulation reference signal (DM-RS), a channel state information reference signal (CSI-RS), a reference for carrying control information signal, phase tracking reference signal (PT-RS), synchronization reference signal, or radio link tracking reference signal (Radio Link Monitoring (RLM) RLM-RS).

In a possible design, the transmission resource information may include at least one of the following information: information of a first resource, where the first resource is the first data sent by the first terminal device to the second terminal device resource; or, the information of the second resource, the second resource is the resource for the first terminal device to send the first control information to the second terminal device; or the information of the third resource, the third resource is the transmission The resource of the second data, the second data is the data received by the first terminal device from the second terminal device; or the information of the fourth resource, the fourth resource is the resource for transmitting the second control information, so The second control information is control information received by the first terminal device from the second terminal device.

In a possible design, the second parameter may further include at least one of the following information: geographic location information; or, the number of retransmissions; or, the subcarrier spacing; or, a transmission mode, where the transmission mode includes unicast , multicast or broadcast; or, the indication information of a specific field in the first control information, where the first control information is the control information sent by the first terminal device to the second terminal device; or, in the second control information Indication information of a specific field, the second control information is the control information received by the first terminal device from the second terminal device; or, the indication of the downlink control information DCI for the side link received from the network device information.

In a possible design, the reference signal may include at least one of the following reference signals: the DM-RS of the first data; or the DM-RS of the first control information; RS of the first control information; wherein the first control information is used to indicate the first data sent by the first terminal device to the second terminal device, or the first control information is the first terminal Feedback information sent by the device to the second terminal device.

In a possible design, the first resource may include the second resource. And/or, the third resource includes the fourth resource.

With the above design, the network device can instruct a pair of UEs performing unicast transmission to generate a reference signal according to the same first parameter, and the first parameter is allocated for this pair of UEs, which is the same as the first parameter allocated by the network device for other pairs of UEs. One parameter is different, so that resources of different UEs for sending reference signals can be well coordinated, so as to further reduce the interference when sending reference signals, and achieve better management and coordination effects of network equipment. In addition, the network device may also instruct a group of UEs performing multicast transmission to generate reference signals according to the same first parameter, and the first parameter is allocated for this group of UEs, which is the same as the first parameter allocated by the network device for other groups of UEs. Different parameters can further reduce interference when transmitting reference signals.

In a possible design, if the first parameter includes the root sequence number of the sequence, the first terminal device may determine the root sequence number of the sequence according to the following formula:

u=f(x)modM;

Wherein, u is the root sequence number, f(x) is a function of the second parameter, x represents the second parameter, mod M represents modulo M, and M is a positive integer.

In a possible design, if the first parameter includes the root sequence number of the sequence, the first terminal device may determine a sequence hop according to the second parameter, and determine the first parameter according to the sequence hop; and /or, the first terminal device may determine a sequence group hop according to the second parameter, and determine the first parameter according to the group hop.

In a possible design, if the first parameter includes the cyclic shift of the sequence, the first terminal device may determine the cyclic shift of the sequence according to the following formula:

Wherein, α is the cyclic shift, h(x) is a function of the second parameter, x represents the second parameter, mod N represents modulo N, and N is the length of the sequence.

In a possible design, the first parameter includes the orthogonal cover code bits of the sequence, and the first terminal device determines the index of the orthogonal cover code of the sequence according to the following formula:

n_occ=q(x)mod K;

Wherein, n_occ is the index of the orthogonal cover code, q(x) is a function of the second parameter, x represents the second parameter, mod K represents modulo K, and K is a positive integer.

In a possible design, if the sequence includes a random sequence and the first parameter includes the sequence initial value of the sequence, the first terminal device may determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *N ₂ +N ₃ +f(x))mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *(N ₁ +f(x))*N ₂ +N ₃ )mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *(N ₂ +f(x))+N ₃ )mod(2 ³¹ );

Wherein, c _init is the sequence initial value of the sequence, f(x) is the function of the second parameter, x represents the second parameter, mod represents the modulo operation, m, N ₁ , N ₂ and N ₃ is the default integer.

In a possible design, if the sequence includes a random sequence and the first parameter includes the initial position of the sequence, the first terminal device may determine the initial position of the sequence according to the following formula:

Δ=f(x);

Wherein, Δ is the initial position, f(x) is a function of the second parameter, and x represents the second parameter.

In a possible design, when sending the reference signal, the first terminal device may send the reference signal on two adjacent symbols in the time domain.

In a possible design, the first terminal device may send the same reference signal at the same frequency domain position on two adjacent symbols in the time domain.

In a second aspect, the present application provides a resource determination method, which can be implemented by a second terminal device. According to the method, the second terminal device can determine a first parameter, the first parameter is used to generate a sequence of reference signals, the first parameter is determined according to a second parameter, and the second parameter can include a parameter used to identify the transmission link. information and/or transfer resource information. The second terminal device may detect the reference signal from the received signal according to the first parameter.

In a possible design, the second terminal device may receive the first parameter from the network device and/or the first terminal device, and the reference signal is sent by the first terminal device.

In a possible design, the first terminal device may also receive the second parameter from the network device and/or the first terminal device, the reference signal is sent by the first terminal device, and thereafter, the The first terminal device may determine the first parameter according to the second parameter.

In a possible design, the first parameter may include at least one of the following: a root sequence number of the sequence, a cyclic shift value of the sequence, and an orthogonal cover code of the sequence.

In a possible design, if the sequence includes a random sequence, the first parameter may further include an initial value of the sequence and/or an initial position of the sequence.

In a possible design, the information for identifying the transmission link may include at least one of the following information: the identification of the first terminal device; or the identification of the second terminal device; or the source identification; or, destination identifier; or, the joint identifier of the first terminal device and the second terminal device; or, the joint identifier of the source identifier and the destination identifier; or, the RNTI configured by the network device for the first terminal device; or, The RNTI configured by the network device for the second terminal device; or the RNTI configured by the network device for the first terminal device and the second terminal device; or the HARQ process number; transmission between the first terminal device and the second terminal device.

In a possible design, the reference signal may include at least one of the following reference signals: a demodulation reference signal (DM-RS), a channel state information reference signal (CSI-RS), a reference for carrying control information signal, phase tracking reference signal (PT-RS), synchronization reference signal, or radio link tracking reference signal (Radio Link Monitoring (RLM) RLM-RS).

In a possible design, the transmission resource information may include at least one of the following information: information of a first resource, where the first resource is the first data sent by the first terminal device to the second terminal device resource; or, the information of the second resource, the second resource is the resource for the first terminal device to send the first control information to the second terminal device; or the information of the third resource, the third resource is the transmission The resource of the second data, the second data is the data received by the first terminal device from the second terminal device; or the information of the fourth resource, the fourth resource is the resource for transmitting the second control information, so The second control information is control information received by the first terminal device from the second terminal device. The reference signal is sent by the first terminal device.

In a possible design, the second parameter may further include at least one of the following information: geographic location information; or, the number of retransmissions; or, the subcarrier spacing; or, a transmission mode, where the transmission mode includes unicast , multicast or broadcast; or, the indication information of a specific field in the first control information, where the first control information is the control information sent by the first terminal device to the second terminal device; or, in the second control information Indication information of a specific field, the second control information is the control information received by the first terminal device from the second terminal device; or, the indication of the downlink control information DCI for the side link received from the network device information. The reference signal is sent by the first terminal device.

In a possible design, the reference signal may include at least one of the following reference signals: the DM-RS of the first data; or the DM-RS of the first control information; RS of the first control information; wherein the first control information is used to indicate the first data sent by the first terminal device to the second terminal device, or the first control information is the first terminal Feedback information sent by the device to the second terminal device.

In a possible design, the reference signal may include at least one of the following reference signals: the DM-RS of the first data; or the DM-RS of the first control information; RS of the first control information; wherein the first control information is used to indicate the first data sent by the first terminal device to the second terminal device, or the first control information is the first terminal The feedback information sent by the device to the second terminal device, and the reference signal is sent by the first terminal device.

In a possible design, the first resource may include the second resource. And/or, the third resource may include the fourth resource.

In a possible design, if the first parameter includes the root sequence number of the sequence, the second terminal device may determine the root sequence number of the sequence according to the following formula:

u=f(x)modM;

Wherein, u is the root sequence number, _f(x) is a function of the second parameter, x represents the second parameter, mod M represents modulo M, and M is a positive integer.

In a possible design, if the first parameter includes the root sequence number of the sequence, the second terminal device may determine a sequence hop according to the second parameter, and determine the first parameter according to the sequence hop; and /or, the second terminal device may determine the sequence group hop according to the second parameter, and determine the first parameter according to the group hop.

In a possible design, if the first parameter includes the cyclic shift of the sequence, the second terminal device may determine the cyclic shift of the sequence according to the following formula:

Wherein, α is the cyclic shift, h(x) is a function of the second parameter, x represents the second parameter, mod N represents modulo N, and N is the length of the sequence.

In a possible design, if the first parameter includes the orthogonal cover code bits of the sequence, the second terminal device may determine the index of the orthogonal cover code of the sequence according to the following formula:

n_occ=q(x)mod K;

Wherein, n_occ is the index of the orthogonal cover code, q(x) is a function of the second parameter, x represents the second parameter, mod K represents modulo K, and K is a positive integer.

In a possible design, if the sequence includes a random sequence, the first parameter includes the sequence initial value of the sequence, and the second terminal device may determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *N ₂ +N ₃ +f(x))mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *(N ₁ +f(x))*N ₂ +N ₃ )mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *(N ₂ +f(x))+N ₃ )mod(2 ³¹ );

Wherein, c _init is the sequence initial value of the sequence, f(x) is the function of the second parameter, x represents the second parameter, mod represents the modulo operation, m, N ₁ , N ₂ and N ₃ is the default integer.

In a possible design, if the sequence includes a random sequence, and the first parameter includes the initial position of the sequence, the second terminal device may determine the initial position of the sequence according to the following formula:

Δ=f(x);

Wherein, Δ is the initial position, f(x) is a function of the second parameter, and x represents the second parameter.

In a third aspect, the present application provides a communication apparatus, which can be used to implement the functions of the first terminal device in the method provided in the first aspect and/or the function of the second terminal device in the method provided in the second aspect. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the communication device may include a transceiver, a memory and a processor. The transceiver is used for communication by a communication device, such as for sending or receiving the above-mentioned reference signal. The memory is coupled to the processor for holding program instructions and data necessary for the communication device. The processor is configured to support the communication device to perform the corresponding function in the method provided in the first aspect and/or configured to support the communication device to perform the corresponding function in the method provided in the second aspect, and the function can be performed by invoking the memory Stored program instruction implementation.

When implementing the function of the first terminal device, the processor may be configured to generate a reference signal according to a first parameter, where the first parameter is used to generate the sequence of the reference signal, the first parameter may be determined according to the second parameter, the The second parameter includes information for identifying the transmission link and/or transmission resource information. Thereafter, the transceiver may transmit the reference signal.

In one possible design, the transceiver may receive the first parameter from a network device. The first parameter may be determined by the network device according to the second parameter.

In a possible design, the transceiver may also receive the second parameter from the network device, and the processor may be further configured to determine the first parameter according to the second parameter.

In a possible design, the transceiver may also send the first parameter and/or the second parameter to the second terminal device, so that the second terminal device determines the sequence of the reference signal according to the first parameter.

In a possible design, the first parameter may include at least one of the following: a root sequence number of the sequence, a cyclic shift value of the sequence, and an orthogonal cover code of the sequence.

In a possible design, if the sequence includes a random sequence, the first parameter may further include an initial value of the sequence and/or an initial position of the sequence.

In a possible design, the information for identifying the transmission link may include at least one of the following information: the identification of the first terminal device; or the identification of the second terminal device; or the source identification; or, destination identifier; or, the joint identifier of the first terminal device and the second terminal device; or, the joint identifier of the source identifier and the destination identifier; or, the RNTI configured by the network device for the first terminal device; or, The RNTI configured by the network device for the second terminal device; or the RNTI configured by the network device for the first terminal device and the second terminal device; or the HARQ process number; transmission between the first terminal device and the second terminal device.

In a possible design, the reference signal may include at least one of the following reference signals: a demodulation reference signal (DM-RS), a channel state information reference signal (CSI-RS), a reference for carrying control information signal, phase tracking reference signal (PT-RS), synchronization reference signal, or radio link tracking reference signal (Radio Link Monitoring (RLM) RLM-RS).

In a possible design, the transmission resource information may include at least one of the following information: information of a first resource, where the first resource is the first data sent by the first terminal device to the second terminal device resource; or, the information of the second resource, the second resource is the resource for the first terminal device to send the first control information to the second terminal device; or the information of the third resource, the third resource is the transmission The resource of the second data, the second data is the data received by the first terminal device from the second terminal device; or the information of the fourth resource, the fourth resource is the resource for transmitting the second control information, so The second control information is control information received by the first terminal device from the second terminal device.

In a possible design, the second parameter may further include at least one of the following information: geographic location information; or, the number of retransmissions; or, the subcarrier spacing; or, a transmission mode, where the transmission mode includes unicast , multicast or broadcast; or, the indication information of a specific field in the first control information, where the first control information is the control information sent by the first terminal device to the second terminal device; or, in the second control information Indication information of a specific field, the second control information is the control information received by the first terminal device from the second terminal device; or, the indication of the downlink control information DCI for the side link received from the network device information.

In a possible design, the reference signal may include at least one of the following reference signals: the DM-RS of the first data; or the DM-RS of the first control information; RS of the first control information; wherein the first control information is used to indicate the first data sent by the first terminal device to the second terminal device, or the first control information is the first terminal Feedback information sent by the device to the second terminal device.

In a possible design, the first resource may include the second resource. And/or, the third resource may include the fourth resource.

In a possible design, if the first parameter includes the root sequence number of the sequence, the processor may determine the root sequence number of the sequence according to the following formula:

u=f(x)modM;

Wherein, u is the root sequence number, f(x) is a function of the second parameter, x represents the second parameter, mod M represents modulo M, and M is a positive integer.

In a possible design, if the first parameter includes the root sequence number of the sequence, the processor may determine a sequence hop according to the second parameter, and determine the first parameter according to the sequence hop; and /or, the processor may determine the sequence group hop according to the second parameter, and determine the first parameter according to the group hop.

In a possible design, if the first parameter includes the cyclic shift of the sequence, the processor may determine the cyclic shift of the sequence according to the following formula:

Wherein, α is the cyclic shift, h(x) is a function of the second parameter, x represents the second parameter, mod N represents modulo N, and N is the length of the sequence.

In a possible design, if the first parameter includes the orthogonal cover code bits of the sequence, the processor may determine the index of the orthogonal cover code of the sequence according to the following formula:

n_occ=q(x)mod K;

Wherein, n_occ is the index of the orthogonal cover code, q(x) is a function of the second parameter, x represents the second parameter, mod K represents modulo K, and K is a positive integer.

In a possible design, if the sequence includes a random sequence and the first parameter includes the sequence initial value of the sequence, the processor may determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *N ₂ +N ₃ +f(x))mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *(N ₁ +f(x))*N ₂ +N ₃ )mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *(N ₂ +f(x))+N ₃ )mod(2 ³¹ );

Wherein, c _init is the sequence initial value of the sequence, f(x) is the function of the second parameter, x represents the second parameter, mod represents the modulo operation, m, N ₁ , N ₂ and N ₃ is the default integer.

In a possible design, if the sequence includes a random sequence and the first parameter includes the initial position of the sequence, the processor may determine the initial position of the sequence according to the following formula:

Δ=f(x);

Wherein, Δ is the initial position, f(x) is a function of the second parameter, and x represents the second parameter.

In a possible design, when the transceiver transmits the reference signal, the reference signal may be transmitted on two adjacent symbols in the time domain.

In a possible design, the transceiver may transmit the same reference signal at the same frequency domain position on two adjacent symbols in the time domain.

When implementing the function of the first terminal device, the processor may determine a first parameter, where the first parameter is used to generate a sequence of reference signals, the first parameter is determined according to a second parameter, and the second parameter may include Information identifying the transmission link and/or transmission resource information. The transceiver may also detect the reference signal from the received signal based on the first parameter.

In a possible design, the transceiver may receive the first parameter from a network device and/or a first terminal device, and the reference signal is sent by the first terminal device.

In a possible design, the transceiver may also receive the second parameter from the network device and/or the first terminal device, the reference signal is sent by the first terminal device, and thereafter, the processing The controller may determine the first parameter according to the second parameter.

In a possible design, the first parameter may include at least one of the following: a root sequence number of the sequence, a cyclic shift value of the sequence, and an orthogonal cover code of the sequence.

In a possible design, if the sequence includes a random sequence, the first parameter may further include an initial value of the sequence and/or an initial position of the sequence.

In a possible design, the information for identifying the transmission link may include at least one of the following information: the identification of the first terminal device; or the identification of the second terminal device; or the source identification; or, destination identifier; or, the joint identifier of the first terminal device and the second terminal device; or, the joint identifier of the source identifier and the destination identifier; or, the RNTI configured by the network device for the first terminal device; or, The RNTI configured by the network device for the second terminal device; or the RNTI configured by the network device for the first terminal device and the second terminal device; or the HARQ process number; transmission between the first terminal device and the second terminal device.

In a possible design, the reference signal may include at least one of the following reference signals: a demodulation reference signal (DM-RS), a channel state information reference signal (CSI-RS), a reference for carrying control information signal, phase tracking reference signal (PT-RS), synchronization reference signal, or radio link tracking reference signal (Radio Link Monitoring (RLM) RLM-RS).

In a possible design, the transmission resource information may include at least one of the following information: information of a first resource, where the first resource is the first data sent by the first terminal device to the second terminal device resource; or, the information of the second resource, the second resource is the resource for the first terminal device to send the first control information to the second terminal device; or the information of the third resource, the third resource is the transmission The resource of the second data, the second data is the data received by the first terminal device from the second terminal device; or the information of the fourth resource, the fourth resource is the resource for transmitting the second control information, so The second control information is control information received by the first terminal device from the second terminal device. The reference signal is sent by the first terminal device.

In a possible design, the second parameter may further include at least one of the following information: geographic location information; or, the number of retransmissions; or, the subcarrier spacing; or, a transmission mode, where the transmission mode includes unicast , multicast or broadcast; or, the indication information of a specific field in the first control information, where the first control information is the control information sent by the first terminal device to the second terminal device; or, in the second control information Indication information of a specific field, the second control information is the control information received by the first terminal device from the second terminal device; or, the indication of the downlink control information DCI for the side link received from the network device information. The reference signal is sent by the first terminal device.

In a possible design, the reference signal may include at least one of the following reference signals: the DM-RS of the first data; or the DM-RS of the first control information; RS of the first control information; wherein the first control information is used to indicate the first data sent by the first terminal device to the second terminal device, or the first control information is the first terminal Feedback information sent by the device to the second terminal device.

In a possible design, the reference signal includes at least one of the following reference signals: DM-RS of the first data; or DM-RS of the first control information; or, carrying the RS of the first control information; wherein the first control information is used to indicate the first data sent by the first terminal device to the second terminal device, or the first control information is the first terminal device For the feedback information sent to the second terminal device, the reference signal is sent by the first terminal device.

In a possible design, the first resource may include the second resource. And/or, the third resource may include the fourth resource.

In a possible design, if the first parameter includes the root sequence number of the sequence, the processor may determine the root sequence number of the sequence according to the following formula:

u=f(x)modM;

Wherein, u is the root sequence number, f(x) is a function of the second parameter, x represents the second parameter, mod M represents modulo M, and M is a positive integer.

In a possible design, if the first parameter includes the root sequence number of the sequence, the processor may determine the sequence hop according to the second parameter, and determine the first parameter according to the sequence hop; and/ Or, the processor may determine the sequence group hop according to the second parameter, and determine the first parameter according to the group hop.

In a possible design, if the first parameter includes the cyclic shift of the sequence, the processor may determine the cyclic shift of the sequence according to the following formula:

Wherein, α is the cyclic shift, h(x) is a function of the second parameter, x represents the second parameter, mod N represents modulo N, and N is the length of the sequence.

In a possible design, if the first parameter includes the orthogonal cover code bits of the sequence, the processor may determine the index of the orthogonal cover code of the sequence according to the following formula:

n_occ=q(x)mod K;

Wherein, n_occ is the index of the orthogonal cover code, q(x) is a function of the second parameter, x represents the second parameter, mod K represents modulo K, and K is a positive integer.

In a possible design, if the sequence includes a random sequence, the first parameter includes the sequence initial value of the sequence, and the processor may determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *N ₂ +N ₃ +f(x))mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *(N ₁ +f(x))*N ₂ +N ₃ )mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *(N ₂ +f(x))+N ₃ )mod(2 ³¹ );

Wherein, c _init is the sequence initial value of the sequence, f(x) is the function of the second parameter, x represents the second parameter, mod represents the modulo operation, m, N ₁ , N ₂ and N ₃ is the default integer.

In a possible design, if the sequence includes a random sequence, the first parameter includes the initial position of the sequence, and the processor may determine the initial position of the sequence according to the following formula:

Δ=f(x);

Wherein, Δ is the initial position, f(x) is a function of the second parameter, and x represents the second parameter.

In a fourth aspect, the present application provides a computer storage medium on which codes are stored, and when these codes are invoked and executed by a computer, the computer can implement the first terminal device and/or the first terminal device and/or the above-mentioned first terminal device in the method provided by the above-mentioned first aspect. The function of the second terminal device in the method provided by the aspect.

In a fifth aspect, the present application provides a computer program product. When called and executed by the computer, the computer program product can make the computer realize the functions of the first terminal device in the method provided in the first aspect and/or the function of the second terminal device in the method provided in the first aspect.

In a sixth aspect, the present application provides a system, where the system includes the first terminal device in the method provided in the first aspect and/or the second terminal device in the method provided in the first aspect.

In a seventh aspect, the present application provides a chip or a chip system, the chip can be coupled with a transceiver, and is used to implement the first terminal device in the method provided in the first aspect and/or the first terminal in the method provided in the first aspect. 2. Function of terminal equipment. The chip system may include the above-mentioned chips.

Description of drawings

FIG. 1 is a schematic diagram of the architecture of a wireless communication system provided by the present application;

FIG. 2 is a schematic diagram of the architecture of another wireless communication system provided by the present application;

3 is a schematic flowchart of a method for generating a reference signal provided by the present application;

4 is a schematic flowchart of another reference signal generation method provided by the present application;

5 is a schematic diagram of the architecture of another wireless communication system provided by the present application;

6 is a schematic flowchart of another reference signal generation method provided by the present application;

7 is a schematic diagram of a random sequence provided by the application;

8 is a schematic structural diagram of a communication device provided by the present application;

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

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The terms involved in the embodiments of the present application are explained below:

1. At least one refers to one, or more than one, that is, including one, two, three and more.

2. Plural means two, or more than two, that is, including two, three and more.

3. Carrying may mean that a certain message is used to carry certain information or data, or it may mean that a certain message is composed of certain information.

4. A sidelink (sidelink) is used for device-to-device (device-to-device, D2D) communication between terminals. It should be understood that the sidelink transmission involved in the embodiments of the present application may be sidelink data transmission or sidelink signal transmission. Specifically, sidelink transmission may include data transmission, control information transmission, or both data transmission and control information transmission. In this application, transmitting may refer to sending and/or receiving and/or sensing.

5. Unicast refers to the transmission of information from one terminal device to another terminal device; multicast refers to the transmission of information from one terminal device to multiple terminal devices; broadcast refers to the transmission of information from one terminal device to all terminal devices within its coverage. Broadcasting is not limited to specific recipients.

6. ZC sequence, also known as Zadoff-Chu sequence, or Frank-Zadoff-Chu (FZC) sequence or Chu sequence, is a kind of perfect sequence. This sequence has ideal periodic autocorrelation properties. The main parameters for generating this sequence are the root sequence number of the sequence and the cyclic shift value.

The ZC sequence can be defined by the following formula:

为参考信号序列，α为序列的循环移位值，u和v是生成基序列的参数。基序列

可以按如下方式生成：in,

is the reference signal sequence, α is the cyclic shift value of the sequence, and u and v are the parameters for generating the base sequence. base sequence

Can be generated as follows:

in,

7. A physical sidelink feedback channel (PSFCH) refers to a channel on which a terminal device carries sidelink feedback control information (SFCI) on a sidelink in a scenario where feedback is required.

8. Reference signals and sequences of reference signals. The reference signal is generated from a sequence of reference signals. Specifically, the sequence of the reference signal that is usually directly generated may be a real number sequence or a complex number sequence. When it is a real number sequence, it can be a binary number string with a certain length composed of {0, 1} or a symbol string composed of {-1, 1}, or a symbol string composed of other real values with a certain length. . When it is a complex number sequence, only the corresponding sequence symbols are complex numbers. According to the determined sequence of reference signals, the mapping symbols of reference signals directly mapped to specific time-frequency resources are obtained, and then the mapping symbols of these reference signals are mapped to the time-frequency resources where the reference signals are located to form reference signals.

Hereinafter, the embodiments of the present application will be described in detail with reference to the accompanying drawings. First, the wireless communication system provided by the embodiment of the present application is introduced, and the reference signal transmission method provided by the present application can be applied to the system, then the signal transmission method provided by the embodiment of the present application is introduced, and finally the communication device provided by the embodiment of the present application is introduced.

As shown in FIG. 1 , the wireless communication system provided by the embodiment of the present application may include a UE 101 and a UE 102 . Optionally, the wireless communication system may further include a network device 103 . It should be understood that application scenarios of the wireless communication system provided by the embodiments of the present application include, but are not limited to, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a wideband code division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, the future 5th Generation (5th Generation, 5G) system, New Radio (NR) communication system, NR vehicle-to-everything (V2X) system or future vehicle-to-everything system based on mobile communication, etc. It should be understood that the wireless communication system 100 provided by the embodiments of the present application may be applicable to both a low frequency scenario (sub 6G) and a high frequency scenario (above 6G).

Exemplarily, UE 101 and UE 102 may be devices such as a terminal (terminal), a mobile station (MS), a mobile terminal (mobile terminal), etc. The UE 101 can communicate with one or more of one or more communication systems. The network device communicates and accepts the network service provided by the network device, and the network device here may include but not limited to the network device 103 shown in the figure. For example, UE 101 and UE 102 in the embodiments of the present application may be mobile phones (or referred to as "cellular" phones), computers with mobile terminals, etc., and UE 101 and UE 102 may also be portable, pocket-sized, handheld type, computer built-in or vehicle-mounted mobile device. The UE 101 and the UE 102 may also be communication chips with communication functions. In this embodiment of the present application, the UE 101 and the UE 102 may be configured to support sidelink transmission.

The network device 103 may include a base station (base station, BS), or include a base station and a radio resource management device for controlling the base station, etc. The base station here may be a base station (Base TransceiverStation, BTS) in a GSM or CDMA system, or It is a base station (NodeB, NB) in the WCDMA system, and can also be an evolved base station (Evolutional NodeB, eNB or eNodeB), a small base station (micro/pico eNB) or a transceiver node (transmission/reception point, TRP) in the LTE system , it can also be a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the base station 200 can be a relay station, an access point, a vehicle-mounted device, a wearable device, and a base station in a future 5G network or a future base station 200 A base station in an evolved PLMN network, for example, an NR base station, is not limited in this embodiment of the present application. The base station in 5G may also be referred to as a next-generation node (generation NodeB, gNB).

Optionally, based on the wireless communication system shown in FIG. 1 , the network device 103 may provide wireless cell signal coverage, and provide one or more cells to serve the UE 101 and the UE 102 . Specifically, the network device 103 and the UE 101 can transmit through a universal user and network air interface (Universal User to Network interface, Uu air interface), and the network device 103 and the UE 102 can also transmit through the Uu air interface. In addition, sidelink transmission may be performed between UE 101 and UE 102 through sidelink resources, wherein UE 101 may be a transmitting end device of sidelink transmission, then UE 102 may be a receiving end device in sidelink transmission, or UE 102 may be a sidelink transmission end device The transmitting end device in transmission, the UE 101 may be the receiving end device in sidelink transmission.

Optionally, the communication link between the terminal device and the terminal device may be a device-to-device (device-to-device, D2D) link, or a side link. In the Internet of Vehicles, the communication link between the terminal device and the terminal device can also be a vehicle-to-vechile (V2V) link, a vehicle-to-pedestrian (V2P) link, and a vehicle-to-pedestrian (V2P) link. To infrastructure (vechile-to-infrastructure, V2I) link, vehicle to any device (vechile-to-X, V2X) link. In the following embodiments of this application, the side link/first link is mainly used to describe the communication transmission between the terminal device and the terminal device, and the cellular link/second link is used to describe the communication between the network device and the terminal device. transmission. At least one of unicast, multicast and broadcast communication between terminal devices can be performed on the side link.

The following takes the Internet of Vehicles scenario shown in FIG. 2 as an example to further describe the application scenario of the wireless communication system provided by the embodiments of the present application.

As shown in Figure 2, the wireless communication system in the Internet of Vehicles scenario may include multiple in-vehicle devices (located on the vehicle, such as UE1, UE2, and UE3 shown in Figure 2, which may be located on different vehicles), multiple in-vehicle devices They can communicate with each other, such as data transmission through sidelink. The wireless communication system may also include one or more base station devices (eg, eNBs and/or gNBs), which may communicate with various in-vehicle devices and/or road side units (RSUs). The wireless communication system may further include one or more RSUs, which can communicate with various vehicle-mounted devices and/or base station devices, and the functions of the RSUs may also be implemented by one vehicle-mounted device or one base station device. RSU can be used for vehicle identification, vehicle violation identification and other functions. The wireless communication system may further include one or more global navigation satellite systems (GNSS) for providing positioning information and timing information for a plurality of vehicle-mounted devices, base station devices and RSUs in the wireless communication system.

It should be understood that the method for determining the reference signal provided by the embodiment of the present application can be applied to the communication between multiple in-vehicle devices in the wireless communication system as shown in FIG. 2 .

Specifically, the in-vehicle device moves with the vehicle at high speed, and the terminal devices have the maximum relative movement speed when they are traveling in opposite directions. For example, the vehicle where UE3 is located and the vehicle where UE1 is located are traveling in different directions on the same road. The relative movement speed between UE1 is the largest. In order to ensure the reliability of communication between terminal devices, the communication devices in the wireless communication system shown in FIG. Between the base station equipment and the RSU, etc.) can use the frequency spectrum of the cellular link for communication, and can also use the intelligent transportation spectrum near 5.9GHz for communication. The mutual communication technology of each communication device can be enhanced based on the LTE protocol, and can also be enhanced based on the D2D technology.

As shown in FIG. 3 , the reference signal sending method provided by the embodiment of the present application may include the following steps:

S101: The first terminal device generates a reference signal according to a first parameter, where the first parameter is used to generate a sequence of reference signals, the first parameter is determined according to a second parameter, and the second parameter may include an identifier for identifying a transmission link information and/or transmission resource information;

S102: The first terminal device sends a reference signal. In implementation, the first terminal device may send the reference signal to another terminal device (eg, a second terminal device) or a network device, which is not specifically limited in this application.

Using the above method, the first terminal device can generate a reference signal according to the information for identifying the transmission link and/or the transmission resource information, so as to reduce signal interference when sending the reference signal.

In implementation, the second terminal device may also determine the first parameter, and detect the reference signal sent by the first terminal device from the received signal according to the first parameter.

It should be understood that the first terminal device shown in FIG. 3 may be a communication device in the wireless communication system provided by the present application, for example, UE 101 or UE 102 in the wireless communication system shown in FIG. 1 , or may be as shown in FIG. 2 . Any one of UE1, UE2, UE3 and RSU in the wireless communication system. The second terminal device may be another communication device located in the same wireless communication system as the first terminal device. The second terminal device may be UE101 or UE102 in the wireless communication system shown in FIG. 1 , or may be any one of UE1 , UE2 , UE3 and RSU in the wireless communication system shown in FIG. 2 .

The transmission between the first terminal device and the second terminal device may be through a sidelink, or may be transmitted through a Uu air interface or a backhaul link (backhaul). Specifically, if there is a network device in the wireless communication system, for example, there is one or more of the network device 103 shown in FIG. 1 , the eNB or the gNB shown in FIG. 2 , the first terminal device and the second terminal device can be respectively The transmission is realized through the Uu air interface with the network device, but it does not exclude the possibility of sidelink transmission between the first terminal device and the second terminal device when there is a network device in the wireless communication system. For example, the first terminal Only one terminal device among the device and the second terminal device is located within the coverage range of the wireless cell signal provided by the network device. If there is no network device in the wireless communication system, sidelink transmission can be performed between the first terminal device and the second terminal device.

In implementation, the second parameter involved in the present application may include information for identifying the transmission link. This information can be used to identify the transmission link between the first terminal device and the second terminal device.

Specifically, the second parameter may include some or all of the following information: the identifier of the first terminal device, the identifier of the second terminal device, the destination identifier, the information used to identify the unicast link, and the information used to identify the multicast link. information, the joint identifier of the first terminal device and the second terminal device, the joint identifier of the source identifier and the destination identifier, the terminal pair identifier of the first terminal device and the second terminal device, the terminal where the first terminal device and the second terminal device are located The terminal group identifier of the device group, the radio network temporary identity (RNTI) configured by the network device for the first terminal device, the RNTI configured by the network device for the second terminal device, the network device being the first terminal device and the second terminal device. The RNTI or hybrid automatic repeat request (hybrid automatic repeat request, HARQ) process number configured by the terminal device.

Hereinafter, the above-mentioned various identifiers will be further described.

The identifier of the first terminal device may be a media access control layer (media access control layer, MAC) identifier of the UE, a network identifier, an identifier configured by a base station (such as the RNTI of the first terminal device or other numbers that can uniquely identify the first terminal). These identifiers may be high-level identifiers of the first terminal, or identifiers used by the first terminal at the physical layer. Optionally, when the first terminal is a transmitting device, it is a source identifier.

Optionally, when the first terminal is a receiving device, it is the destination identifier. Optionally, for the destination identifier, when the first terminal device sends the reference signal by unicast, the destination identifier may be the identifier of the destination terminal device or the receiver. Optionally, when the first terminal device sends the reference signal by multicast, the destination identifier indicates or determines an identifier for a group of terminal devices to receive multicast. Optionally, when the first terminal device transmits the reference signal by broadcasting, the destination identifier indicates or determines an identifier for reception by the terminal device of a non-specific user.

Information used to identify a unicast link. For example: an identifier used to uniquely associate or determine a unicast link.

The joint identifier of the first terminal device and the second terminal device. For example, the combination of the identifier of the first terminal device and the identifier of the second terminal device may be a combination of all the identifiers, or a combination of a part of the identifiers taken out respectively. Or a combination of the source identifier and the destination identifier can replace or indicate the joint identifier of the first terminal device and the second terminal device.

Terminal pair identifiers of the first terminal device and the second terminal device. For example, it may be an identifier configured by the network when performing unicast communication between the first terminal device performing unicast communication and the second terminal device. For example, the RNTI of the UE pair used in downlink control information (DCI) sent to the pair of the first terminal device and the second terminal device through the cellular link.

The terminal group identifier of the terminal equipment group where the first terminal device and the second terminal device belong. For example, it may be an identifier configured by the network to perform multicast communication for multiple devices that perform multicast communication. For example, the RNTI used in the DCI information sent to the terminal group where the first terminal device and the second terminal device are located through the cellular link.

The identifier configured by the network device for the first terminal device. For example, the RNTI used in the DCI information sent to the first terminal device over the cellular link.

The identifier configured by the network device for the second terminal device. For example, the RNTI used in the DCI information sent to the second terminal device over the cellular link.

The hybrid automatic repeat request HARQ process number configured by the network device for the first terminal device and the second terminal device.

In the above manner, the first terminal device can generate the reference signal according to the information for identifying the transmission link, so that the reference signal is related to the transmission link, and interference between the reference signals can be avoided. Specifically, when the first terminal device transmits to the second terminal device in a unicast manner, the information of the transmission link of the unicast transmission can be used as the second parameter, and the first terminal device and the second terminal device can The reference signal is generated with two parameters, so that the interference between the reference signal sent between the first terminal device and the second terminal device and other reference signals can be reduced, and the communication between the first terminal device and the second terminal device in the unicast mode can be improved. Communication reliability. When the first terminal device transmits to multiple terminal devices including the second terminal device in a multicast manner, the information of the transmission link of the multicast transmission can be used as the second parameter, and the first terminal device communicates with the multiple terminal devices. The terminal devices can all generate reference signals according to the second parameter, so that the interference between the reference signals sent between the first terminal device and the multiple terminal devices and other reference signals can be reduced, and the interference between the first terminal device and the multiple terminal devices can be improved. Communication reliability of end devices in multicast mode.

In addition, in implementation, the second parameter involved in this application may include transmission resource information. Specifically, when the first terminal device sends the first data to the second terminal device, the second parameter may include a resource (hereinafter referred to as the first resource) for the first terminal device to send the first data, and the resource may include a time domain and/or frequency domain resources. For example, the second parameter may include the number of the first subchannel or physical resource block (PRB) where the physical sidelink shared channel (PSSCH) carrying the first data is located; or, the second parameter The parameter may include the number of the middle sub-channel or PRB where the PSSCH is located; or the second parameter may include the number of the last sub-channel or PRB where the PSSCH is located; or, the second parameter may include the configuration or instruction through signaling. The number of the subchannel or PRB where the PSSCH is located. At this time, the reference signal may include a demodulation reference signal (DM-RS) of the first data, or a channel state information reference signal (CSI-RS) or a phase tracking reference sent in the same time slot as the PSSCH Signal (phase tracking reference signal, PT-RS).

When the first terminal device sends the first control information to the second terminal device, the second parameter may include the resource for the first terminal device to send the first control information (hereinafter referred to as the second resource, and the first resource may include the second resource) , the resources may include time domain and/or frequency domain resources. For example, the second parameter may include the number of the first subchannel or PRB where the physical sidelink control channel (PSCCH) carrying the first control information is located; or, the second parameter may include the middle where the PSCCH is located The number of the subchannel or PRB; or the second parameter may include the number of the last subchannel or PRB where the PSCCH is located; or, the second parameter may include the subchannel or PRB where the PSCCH is located configured or indicated by signaling 's number. At this time, the reference signal may be a DM-RS of the first control information or a pilot signal (reference signal, RS) carrying the first control information. The first control information may be used to indicate the first data transmitted by the first terminal device to the second terminal device, or the first control information may be feedback information sent to the second terminal device. In addition, if the first control information is SFCI, the second parameter may further include the number of the first subchannel or PRB where the PSFCH carrying the SFCI is located; or, the second parameter may include the middle subchannel or PRB where the PSFCH is located or the second parameter may include the number of the last subchannel or PRB where the PSFCH is located; or the second parameter may include the number of the subchannel or PRB where the PSFCH is located configured or indicated by signaling.

With the above design, the first terminal device can determine the sequence of the reference signal according to the transmission parameter when it sends the first data or the first control information to the second terminal device, which can reduce the need for the reference signal generated according to the sequence to be sent by other communication devices. interference between reference signals.

In addition, the second parameter may further include indication information or a value of a certain field in the above first control information. For example, the first control information is sidelink control information (SCI), and the field may be a modulation and coding scheme (MCS) field, a resource allocation field, or a time domain location field indicated by the SCI, so that the first A terminal device and/or a second terminal device may take the value of the MCS field, the value of the resource allocation field or the value of the time domain location field in the SCI as the second parameter.

In addition, when the first terminal device receives the second data from the second terminal device, the second parameter may include a resource (hereinafter referred to as a third resource) for the second terminal device to send the second data, and the resource may include time domain and/or or frequency domain resources. For example, the second parameter may include the number of the first subchannel or PRB where the PSSCH carrying the second data is located; alternatively, the second parameter may include the number of the middle subchannel or PRB where the PSSCH is located; or the second parameter may Including the number of the last sub-channel or PRB where the PSSCH is located; or the second parameter may include the number of the sub-channel or PRB where the PSSCH is located configured or indicated by signaling.

When the first terminal device receives the second control information from the second terminal device, the second parameter may include a resource for the second terminal device to send the second control information (hereinafter referred to as the fourth resource, and the third resource may include the fourth resource) , the resources may include time domain and/or frequency domain resources. For example, the second parameter may include the number of the first subchannel or PRB where the PSCCH carrying the second control information is located; or, the second parameter may include the number of the middle subchannel or PRB where the PSCCH is located, or the second parameter It may include the number of the last subchannel or PRB where the PSCCH is located; or the second parameter may include the number of the subchannel or PRB where the PSCCH is located configured or indicated by signaling. In addition, if the second control information is SFCI, the second parameter may further include the number of the first subchannel or PRB where the PSFCH carrying the SFCI is located, or the second parameter may include the middle subchannel or PRB where the PSFCH is located or the second parameter may include the number of the last subchannel or PRB where the PSFCH is located.

With the above design, the first terminal device can determine the sequence of the reference signal according to the transmission parameter when the second terminal device sends the second data or the second control information to the first terminal device, which can reduce the communication between the reference signal generated according to the sequence and other Interference occurs between the reference signals sent by the devices.

In addition, the second parameter may further include indication information or a value of a field in the above second control information. For example, the second control information is an SCI, and the field may be an MCS field, a resource allocation field, or a time domain location field indicated by the SCI, so that the first terminal device and/or the second terminal device can use the value of the MCS field in the SCI, The value of the resource allocation field or the value of the time domain location field is used as the second parameter.

In addition, the second parameter may further include geographic location information, indication information in the DCI for the sidelink link received from the network device, the identifier of the sidelink HARQ used for unicasting, the sidelink used for multicasting The identifier of the uplink HARQ, the information used to indicate whether the current transmission is retransmitted, the information used to indicate the transmission times of the current transmission, the currently used resource zone identifier (ZoneID), the subcarrier spacing of the transmission reference signal, and the transmission mode information. some or all of the information. Therefore, the reference signal generated according to the above second parameter can be further distinguished from other reference signals, and the interference between the reference signals can be reduced.

Optionally, the above-mentioned geographic location information may include GNSS coordinates of the first terminal device and/or the second terminal device, or location information determined based on a GNSS standard.

Optionally, the indication information in the DCI for the sidelink link received from the network device by the first terminal device and/or the second terminal device may include a second parameter value directly indicated by the DCI. Or through other fields in the DCI, such as the MCS field, the resource allocation field or the time domain location field, so that the first terminal device and/or the second terminal device can use the value of the MCS field and the value of the resource allocation field in the SCI. Or the value of the time domain location field is used as the second parameter.

Optionally, the above-mentioned information used to indicate whether to retransmit currently is used to indicate whether the transmission of the first terminal device and/or the second terminal device is to be retransmitted or not to be retransmitted.

Optionally, the above-mentioned information used to indicate the transmission times of the current transmission may include the transmission times when one transmission is performed, such as 1 time, 2 times, 4 times, and so on.

Optionally, the above-mentioned currently used resource area identifier may be configured by the network, or may be calculated based on the GNSS coordinates of the first terminal device and/or the second terminal device.

Optionally, for the subcarrier spacing of the above-mentioned transmission reference signal, the subcarrier spacing may be 15 kHz, 30 kHz, 60 kHz, 120 kHz, or the like.

Optionally, the above-mentioned transmission mode information may include any one of unicast, multicast, or broadcast.

When the above-mentioned information is used, all fields or complete values indicating the information may be used, or fields or partial values indicating part of the information may be used. The present invention does not limit this.

In this embodiment of the present application, the reference signal involved in the method shown in FIG. 3 can also be used to use a feedback channel to carry feedback information, and the feedback information can be carried by a sequence of reference signals, or by using a feedback channel coded bits of control information. The feedback channel may carry RS or DM-RS for feedback information. The reference signal may also include a DM-RS used by a physical sidelink share channel (PSSCH) of a data channel, a DM-RS used by a physical sidelink control channel (PSCCH), and a DM-RS used for channel state information ( RS for channel state information (CSI) measurement or radio resource management (RRM) measurement or radio link monitoring (RLM) measurement, such as sounding reference signal (SRS), PT-RS, A radio link tracking reference signal RLM-RS or CSI-RS, or a control channel for synchronization, such as a physical sidelink broadcast channel (PSBCH). The above-mentioned or not limited to the above-mentioned types of RSs are not enough to limit the solution of the present invention.

In addition, in implementation, the reference signal described in this application may be replaced by a scrambling sequence. Specifically, the first terminal device may determine the scrambling sequence according to the first parameter, and send the scrambling sequence to the second terminal device. When the first terminal device transmits data or control information, it can use the scrambling sequence to perform scramble processing on the data or control information to be transmitted, and the receiving end device of the data or control information can obtain data or control information. Specifically, the first terminal device may scramble the bits of the data or control information to be transmitted according to the following method:

是加扰后的比特，b(i)是加扰前的比特，c(i)是根据本申请实施例生成的加扰序列，mod表示取模运算。in

is the scrambled bit, b(i) is the bit before scrambling, c(i) is the scrambled sequence generated according to the embodiment of the present application, and mod represents a modulo operation.

Accordingly, another method provided by the embodiments of the present application may include the following steps:

S103: The first terminal device generates a scrambling sequence according to a first parameter, the first parameter is determined according to a second parameter, and the second parameter may include information for identifying a transmission link and/or transmission resource information, so The scrambling sequence is used to scramble data or control information to be transmitted in the first terminal device;

S104: The first terminal device sends the scrambling sequence. In implementation, the first terminal device may send the scrambling sequence to another terminal device (eg, a second terminal device) or a network device, which is not specifically limited in this application.

In a possible implementation manner, before the step shown in S101, if the wireless communication system includes a network device, the first terminal device may receive the first parameter from the network device. The first parameter may be determined by the network device according to the second parameter, and the first terminal device may generate a sequence of reference signals according to the first parameter, and then generate a reference signal according to the sequence. In addition, the first terminal device may also receive the second parameter from the network device, then generate the first parameter according to the second parameter, generate a sequence of reference signals according to the first parameter, and then generate the reference signal according to the sequence.

In another implementation manner, before the step shown in S101, the first terminal device may also receive the first parameter from the second terminal device. The first parameter may be determined by the second terminal device according to the second parameter, and the first terminal device may generate a sequence of reference signals according to the first parameter, and then generate a reference signal according to the sequence. In addition, the first terminal device may also receive the second parameter from the second terminal device, then generate the first parameter according to the second parameter, generate a sequence of reference signals according to the first parameter, and then generate the reference signal according to the sequence.

The network device may indicate the first parameter and/or the second parameter to the first terminal device through DCI, radio resource control (RRC) signaling, or system information blocks (system information blocks, SIB) signaling. Specifically, the second parameter can be indicated by the value of a certain field in the DCI or RRC signaling, where the DCI or RRC signaling can be used to indicate the network equipment to allocate the first terminal equipment and/or the second terminal equipment Transmission resources, which can be used for the first terminal device and the second terminal device to transmit data and/or control information.

In addition, the network device may also indicate the first parameter and/or the second parameter to the second terminal device through the same signaling. For example, when the first terminal device and the second terminal device perform unicast transmission, the network device may send DCI to the first terminal device and the second terminal device respectively, and the DCI may carry the UEs of the first terminal device and the second terminal device. -pairedRNTI, at this time, the UE-paired RNTI can also be used as the second parameter; if the first terminal device performs multicast transmission with multiple terminal devices including the second terminal device, the network device can communicate with the first terminal device to the first terminal device. The second terminal equipment sends DCI respectively, and the DCI can carry the UE-group RNTI of the terminal equipment group where the first terminal equipment and the multiple terminal equipments are located. At this time, the UE-group RNTI can also be used as the second parameter. In the multicast mode, the network device can also send the DCI to a management device (group head) in a group of terminal devices, and the manager device distributes the DCI to the first terminal device and/or the second terminal device.

With the above design, the network device can instruct a pair of UEs performing unicast transmission to generate a reference signal according to the same first parameter, and the first parameter is allocated for this pair of UEs, which is the same as the first parameter allocated by the network device for other pairs of UEs. One parameter is different, so that resources of different UEs for sending reference signals can be well coordinated, so as to further reduce the interference when sending reference signals, and achieve better management and coordination effects of network equipment. In addition, the network device may also instruct a group of UEs performing multicast transmission to generate reference signals according to the same first parameter, and the first parameter is allocated for this group of UEs, which is the same as the first parameter allocated by the network device for other groups of UEs. Different parameters can further reduce interference when transmitting reference signals.

Hereinafter, the reference signal sending method provided by the present application will be further described with reference to the accompanying drawings.

Taking FIG. 1 as an example, if the UE 101 sends data to the UE 102 in unicast mode, the network device 103 can allocate transmission resources, the transmission resources are used for the UE 101 to send data to the UE 102, and the network device 103 can indicate the transmission resources through DCI , after receiving the DCI from the network device 103, the UE 101 can use the UE-paired RNTI in the DCI, the value of the MCS field, the value of the resource allocation field, the value of the time domain location field, or other information as the second parameter, and thereafter , the UE 101 can generate a reference signal according to the second parameter, and send the reference signal to the UE 102 , and the reference signal can be used to indicate the data sent by the UE 101 to the UE 102 .

In addition, in the above example, the network device 103 may also indicate the transmission resource to the UE 102 through DCI, and the UE 102 may indicate the UE-paired RNTI in the DCI, the value of the MCS field, the value of the resource allocation field, the time domain The value of the location field or other information is used as the second parameter. The UE 101 may also indicate the second parameter to the UE 102 after generating the reference signal according to the second parameter. For example, the UE 101 may indicate to the UE 102 the indication information or value of a field in the SCI sent to the UE 102 Second parameter. Therefore, the UE 102 can determine the second parameter according to the transmission resource information used when the UE 101 sends data to the UE 102 .

In the embodiment of the present application, in the unicast mode, after determining the second parameter, the UE 102 may determine the first parameter according to the second parameter, and detect the reference signal sent by the UE 101 according to the first parameter. The UE 102 may also determine a reference signal according to the first parameter, which may be used to indicate data sent by the UE 102 to the UE 101; alternatively, the UE 102 may determine the first parameter according to the second parameter, and send the UE 101 to the UE 101 according to the first parameter. Send feedback. Specifically, the UE 102 may determine the first parameter according to the second parameter according to the reference signal sending method provided in the present application, and generate a reference signal according to the first parameter, and the reference signal may be used to carry the feedback information sent by the UE 102 to the UE 101, The feedback information may be carried on the PSFCH.

As shown in FIG. 4 , when the UE 101 sends a reference signal to the UE 102 in a unicast manner, the method for sending a reference signal provided by this embodiment of the present application may include the following steps:

S201: The UE 101 determines the first parameter.

S202: The UE 101 generates a reference signal according to the first parameter.

S203: The UE 101 sends the reference signal to the UE 102 in a unicast manner.

S204: The UE 102 detects the reference signal sent by the UE 101 in the received signal according to the first parameter. Before S204, the UE 102 may determine the first parameter according to the method provided in this application.

It should be understood that, in the above example, the UE 101 may also determine the first parameter according to the second parameter, and use the sequence determined according to the first parameter as the scrambling sequence, and the scrambling sequence may be used for data sent by the UE 101 to the UE 102 Scrambling is performed, and the UE 101 may send the scrambling sequence to the UE 102 .

As shown in FIG. 5 , if UE 501 sends data to UE 502, UE 503 and UE 504 in multicast mode, the network device may allocate transmission resources for UE 501 to send data to UE 502, UE 503 and UE 504 , the network device can carry the group identifiers of the terminal device groups where the UE 501, UE 502, UE 503 and UE 504 are located in the DCI, and the network device can indicate the transmission resource through the DCI. After receiving the DCI from the network device, the UE 501 can The UE-groupRNTI, the value of the MCS field, the value of the resource allocation field, the value of the time domain location field, or other information in the second parameter are used as the second parameter, after which the UE 501 can generate a reference signal according to the second parameter, and use The reference signal is sent to UE 502, UE 503, and UE 504, and the reference signal can be used to indicate data sent by UE 501 to UE 502, UE 503, and UE 504.

In addition, in the above example, the network device can also indicate the transmission resource to UE 502, UE 503 and UE 504 through DCI, and UE 502, UE 503 and UE 504 can respectively fetch the UE-group RNTI and MCS fields in the DCI. The value, the value of the resource allocation field, the value of the time domain location field, or other information are used as the second parameter.

The UE 501 can also indicate the second parameter to the UE 502, the UE 503 and the UE 504 after generating the reference signal according to the second parameter. 502, UE 503 and UE 504 indicate the second parameter. Therefore, the UE 502, the UE 503 and the UE 504 can determine the second parameter according to the indication information or value of a certain field in the SCI.

In the embodiment of the present application, in the multicast mode, after determining the second parameter, the UE 502, the UE 503 and the UE 504 may determine the first parameter according to the second parameter, and detect the reference signal sent by the UE 501 according to the first parameter .

The UE 502, the UE 503 and the UE 504 may also determine the first parameter according to the second parameter, and generate a reference signal according to the first parameter, and the reference signal may be used to indicate the data each of the UE 502, the UE 503 and the UE 504 sends to the UE 501 Alternatively, after determining the second parameter, the UE 502, the UE 503 and the UE 504 may determine the first parameter according to the second parameter, and generate a reference signal according to the first parameter, and the reference signal may be used by the UE 502, the UE 503 and the UE 504 each send feedback information to UE 501 . Specifically, the UE 502 can determine the first parameter according to the second parameter according to the reference signal sending method provided by the present application, and generate a reference signal according to the first parameter, and the reference signal can be used to carry the feedback information sent by the UE 502 to the UE 501, The feedback information may be carried on the PSFCH. The UE 503 can also determine the first parameter according to the second parameter according to the reference signal sending method provided in this application, and generate a reference signal according to the first parameter, and the reference signal can be used to carry the feedback information sent by the UE 503 to the UE 501, the feedback information Can be carried on PSFCH. The UE 504 may also determine the first parameter according to the second parameter according to the reference signal sending method provided in this application, and generate a reference signal according to the first parameter, and the reference signal may be used to carry the feedback information sent by the UE 504 to the UE 501, and the feedback Information may be carried on the PSFCH.

As shown in FIG. 6 , when the UE 501 in the above FIG. 5 sends the reference signal to the UE 502, the UE 503 and the UE 504 in a multicast manner, the method for sending the reference signal provided by the embodiment of the present application may include the following steps:

S301: The UE 501 determines the first parameter.

S302: The UE 501 generates a reference signal according to the first parameter.

S303: The UE 501 sends the reference signal to the UE 502, the UE 503 and the UE 504 in a multicast manner.

S304: The UE 502, the UE 503 and the UE 504 respectively detect the reference signal sent by the UE 501 in the received signal according to the first parameter. Before S304, the UE 502, the UE 503, and the UE 504 may determine the first parameter according to the method provided in this application, respectively.

Optionally, in the present invention, by detecting the reference signal sent by the UE 501 in the received signal, the feedback information carried in the signal, or the data carried in the data corresponding to the reference signal or the data transmitted in the control channel can be obtained. Wherein, the data or control channel corresponding to the reference signal includes, the reference signal is a demodulation reference signal of the data or control channel; or the reference signal is a reference signal sent simultaneously in the same time slot as the data or control channel. Optionally, these reference signals may be: CSI-RS, PT-RS, RS bearing feedback or control information, and the like.

It should be understood that, in the above example, the UE 501 may also determine the first parameter according to the second parameter, and use the sequence determined according to the first parameter as the scrambling sequence, and the scrambling sequence may be used for sending the scrambling sequence from the UE 501 to the UE 502 and the UE 503. And the data sent by UE 504 is scrambled, and UE 501 can send the scrambling sequence to UE 402 , UE 503 and UE 504 .

In the implementation of the step shown in S102, the first terminal device may send the reference signal on two adjacent symbols in the time domain. Further, the first terminal device may send the same reference signal at the same frequency domain position on two adjacent symbols in the time domain. It may also be that the first terminal device sends the same reference signal at different frequency domain positions on two adjacent symbols in the time domain. Alternatively, it may also be that the first terminal device sends different reference signals at different frequency domain positions on two adjacent symbols in the time domain. The method provided by the embodiment of the present application can be used for two symbols with reference signal sent when the reference signal and data are not sent along the path, so that the receiver can use the first symbol with reference signal for automatic gain control (auto gain control, AGC). In this way, it can be ensured that at least one symbol of the parameter signal can be completely received by the receiver, thereby ensuring the receiving performance.

The following describes the method for determining the first parameter by the first terminal device and/or the second terminal device in the reference signal sending method provided by the present application.

In this embodiment of the present application, the first parameter may include at least one of a root sequence number of the sequence, a cyclic shift value, or an orthogonal cover code (orthogonal cover code, OCC) of the sequence. Wherein, the sequence may be a ZC sequence, or other sequences whose length is not greater than 36. It should be understood that each of the first parameters can be separately determined according to one of the second parameters described above or a combination of multiple second parameters.

Specifically, the root sequence number of the sequence can be determined according to the following formula:

u=f(x)modM.

Among them, u is the root sequence number of the sequence, f(x) is a function of the second parameter, x represents the second parameter, mod M represents the modulo of M, and M is a positive integer. Exemplarily, M may be the maximum number of root base sequences of the sequence, for example, M may be the length of the sequence. In implementation, x may be the value of a certain second parameter, or x may be a value corresponding to the value of a certain second parameter, and the mapping relationship between the value of the second parameter and the value may be preset in advance . Optionally, x can be one or more parameters. When there are multiple parameters, x can be regarded as a variable of multiple parameters.

Optionally, the root sequence number of the sequence can also be determined according to the following formula:

u=(a+f(x))modM; or

u=(a+b+f(x))modM.

Among them, u is the root sequence number of the sequence, a and b are integers, f(x) is a function of the second parameter, x represents the second parameter, mod M represents the modulo of M, and M is a positive integer. Exemplarily, M can be the maximum number of root base sequences of the sequence.

Further, when the second parameter includes only one type of parameter (for example, the second parameter includes only the information of the first resource), f(x) can be expressed as:

f(x)=x; or

f(x)=c*x; or

f(x)=c*x+d.

Among them, f(x) is a function of the second parameter, x represents the second parameter, and c and d are integers. Optionally, x can be one or more parameters. When there are multiple parameters, x can be regarded as a variable of multiple parameters.

In addition, when the second parameter includes multiple types of parameters (for example, the second parameter includes the UE-paired RNTI of the first terminal device and the second terminal device in addition to the information of the first resource), f(x) can be expressed as :

f(x)=xi+xj; or

f(x)=c1*xi+c2*xj; or

f(x)=c1*xi+d1+c2*xj+d2.

Among them, f(x) is a function of the second parameter, x represents the second parameter, xi represents the second parameter of the first type, xj represents the second parameter of the second type, and c1, c2, d1 and d2 are integers. Optionally, x can be one or more parameters. When there are multiple parameters, x can be regarded as a variable of multiple parameters.

In the above embodiment, the values of a, b, c, d, c1, c2, d1 and d2 can be based on the cell identity, the alternative cell identity configured by the network device, the indication information of the time slot where the reference signal is located, and the location where the reference signal is located. The indication information of the symbol, the indication information of the subcarrier interval for transmitting the reference signal, and one or more parameters of the RNTI are determined. A feasible way, parameters a, b, c, d, c1, c2, d1 and d2, can be used in these parameters (such as: cell identity, indication information of the time slot where the reference signal is located, and indication information of the symbol where the reference signal is located. , the indication information of the subcarrier interval for transmitting the reference signal, and the RNTI of the first terminal device and/or the second terminal device). Optionally, the values of these parameters can be the same or different.

Exemplarily, the root sequence number of the sequence may also be calculated according to the sequence hop and/or the sequence group hop.

Specifically, the root sequence number of the sequence can be determined according to the following formula:

u = (f _gh + f _ss + g ₁ (x)) mod 30; or

u = (f _gh + g ₁ (x)) mod 30; or

u=(f _ss + g ₁ (x)) mod30.

Among them, u is the root sequence number of the sequence, f _gh is the sequence group hop, f _ss is the sequence hop, g ₁ (x) is the function of the second parameter, x represents the second parameter, and mod represents the modulo operation.

In implementation, _fgh and _fss can be determined according to the following formulas:

f _ss = (n _ID +g ₃ (x)) mod 30

v=0

表示在特定子载波间隔μ下的一个无线帧中的时隙数，m为整数，为一个中间变量表示，n_hop为指示是否跳频的参数，c()为一个随机序列。g₂(x)以及g₃(x)是x的函数，x表示第二参数。Among them, n _ID represents a randomized identification of the network configuration,

Represents the number of time slots in a radio frame under a specific subcarrier interval μ, m is an integer, represented by an intermediate variable, n _hop is a parameter indicating whether frequency hopping, and c() is a random sequence. g ₂ (x) and g ₃ (x) are functions of x, which represents the second parameter.

Alternatively, _fgh and _fss can be determined according to the following formulae:

f _ss = (n _ID +g ₃ (x)) mod 30

v=0

表示在特定子载波间隔μ下的一个无线帧中的时隙数，m为整数，为一个中间变量表示，n_hop为指示是否跳频的参数，c()为一个随机序列。g₂(x)以及g₃(x)是x的函数，x表示第二参数。可选的，x可以为一个或多个参数，当为多个参数时，x可以视为多个参数的变量。Among them, n _ID represents a randomized identification of the network configuration,

Represents the number of time slots in a radio frame under a specific subcarrier interval μ, m is an integer, represented by an intermediate variable, n _hop is a parameter indicating whether frequency hopping, and c() is a random sequence. g ₂ (x) and g ₃ (x) are functions of x, which represents the second parameter. Optionally, x can be one or more parameters. When there are multiple parameters, x can be regarded as a variable of multiple parameters.

In the above example, the setting method of g ₁ (x), g ₂ (x) and g ₃ (x) can refer to the setting method of f(x). Among them, g ₁ (x), g ₂ (x) and g ₃ (x) may respectively represent different functions of x.

Optionally, the cyclic shift of the sequence can be determined according to the following formula:

Wherein, α is the cyclic shift, h(x) is a function of the second parameter, x represents the second parameter, mod N represents modulo N, and N is the length of the sequence.

In the above example, the setting method of h(x) can refer to the setting method of f(x).

Optionally, the index of the orthogonal cover code of the sequence can be determined according to the following formula:

n_occ=q(x)mod K;

Wherein, n_occ is the index of the orthogonal cover code, q(x) is a function of the second parameter, x represents the second parameter, mod K represents modulo K, and K is a positive integer. Exemplarily, K may be the number of OCC sequences. After n_occ is determined, the orthogonal cover code can be obtained by querying according to the index of the orthogonal cover code and the correspondence table of the orthogonal cover code.

In the above example, the setting method of q(x) can refer to the setting method of f(x).

If the sequence of the reference signal adopts a random sequence, the first parameter may include a sequence initial value and/or an initial position of the sequence.

Exemplarily, taking the random sequence as a gold sequence with a length of 31 bits as an example, the initial sequence value of the sequence can be determined according to the following formula:

c _init = (2 ^m *N ₁ *N ₂ +N ₃ +f(x))mod(2 ³¹ ); or

c _init = (2 ^m *(N ₁ +f(x))*N ₂ +N ₃ )mod(2 ³¹ ); or

c _init =(2 ^m *N ₁ *(N ₂ +f(x))+N ₃ )mod(2 ³¹ ).

Wherein, c _init is the sequence initial value of the sequence, f(x) is the function of the second parameter, x represents the second parameter, mod represents the modulo operation, m, N ₁ , N ₂ and N ₃ is the default integer. For example, it can be any arbitrary information such as cell identification, alternative cell identification configured by the base station, indication information of the slot where the reference signal is located, indication information of the symbol where the reference signal is located, indication information of the subcarrier interval for transmitting the reference signal, CP type, RNTI, etc. one or more. Optionally, the values of these parameters can be the same or different.

Exemplarily, the initial position of the sequence can be determined according to the following formula:

Δ=f(x).

Wherein, Δ is the initial position of the sequence, f(x) is a function of the second parameter, and x represents the second parameter. Optionally, x can be one or more parameters. When there are multiple parameters, x can be regarded as a variable of multiple parameters. For the setting method of f(x), reference may be made to the foregoing description of the embodiments of the present application.

After Δ is determined, a new random sequence (hereinafter referred to as the sequence to be used) can be determined or acquired on the basis of the random sequence (hereinafter referred to as the original sequence) according to Δ, and a reference signal can be generated according to the sequence to be used, thereby further improving the reference The anti-interference ability of the signal.

Specifically, the sequence to be used can be determined according to the following formula:

c(n)=c0(n+Δ).

Among them, c is the sequence to be used, c0 is the original sequence, Δ is the offset value f(x) is the function of the second parameter, x is the second parameter, n=0,1,...,M-1 , M is the length of the sequence to be used.

In the above formula, the relationship between the sequence to be used and the original sequence is shown in FIG. 7 , where Nc represents the initial offset of the sequence to be used determined from the original sequence, where Nc is a positive integer. Optionally, for example, Nc=1600.

It should be understood that after the first parameter is determined according to the second parameter, a sequence may be generated according to the first parameter, and a reference signal may be generated according to the sequence. The present application does not specifically limit the manner of generating the sequence according to the first parameter and generating the reference signal according to the sequence.

Based on the same inventive concept as the above method embodiments, the embodiments of the present application further provide a communication apparatus, where the communication apparatus can be used to implement the functions performed by the first terminal device and/or the second terminal device in the above method embodiments . The functions can be implemented by hardware, and can also be implemented by software or hardware executing corresponding software. The hardware or software may include one or more modules corresponding to the above functions.

Exemplarily, as shown in FIG. 8 , the structure of the communication device may include a transceiver 801 , a memory 802 and a processor 803 . The transceiver 801 can be used for communication by a communication device, such as for sending or receiving the above-mentioned reference signal. The memory 802 is coupled to the processor 803 for storing necessary program instructions and data for the communication device. The processor 803 is configured to support the communication device to perform the corresponding function in the method provided in the first aspect, and the function may be implemented by invoking program instructions stored in the memory 802 . Specifically, the transceiver 801 can be a wireless transceiver, which can be used to support the communication device to receive and send signaling and data through the wireless air interface. The above transceiver 701, processor 702 and memory 703 can be connected through a bus structure or other connection medium.

Hereinafter, the functions possessed by each component of the communication device shown in FIG. 8 will be described in detail.

When implementing the function of the first terminal device, the processor 803 may be configured to generate a reference signal according to a first parameter, where the first parameter is used to generate the sequence of the reference signal, and the first parameter may be determined according to the second parameter, The second parameter may include information for identifying the transmission link and/or transmission resource information. Thereafter, the transceiver 801 may transmit the reference signal.

Wherein, the transceiver 801 may receive the first parameter from a network device. The first parameter may be determined by the network device according to the second parameter. Alternatively, the transceiver 801 may also receive the second parameter from a network device, and the processor 803 may be further configured to determine the first parameter according to the second parameter.

Exemplarily, the transceiver 801 may also send the first parameter and/or the second parameter to the second terminal device, so that the second terminal device determines the sequence of the reference signal according to the first parameter.

The first parameter involved in the present application may include at least one of the following: the root sequence number of the sequence, the cyclic shift value of the sequence, and the orthogonal cover code of the sequence. In addition, if the sequence includes a random sequence, the first parameter may further include the sequence initial value of the sequence and/or the initial position of the sequence.

In implementation, the information used to identify the transmission link may include at least one of the following information: the identification of the first terminal device; or the identification of the second terminal device; or the source identification; or the destination identification; or , the joint identifier of the first terminal device and the second terminal device; or the joint identifier of the source identifier and the destination identifier; or the RNTI configured by the network device for the first terminal device; or the network device is the The RNTI configured by the second terminal device; or the RNTI configured by the network device for the first terminal device and the second terminal device; or the HARQ process number; transmission between the device and the second terminal device.

The reference signal may include at least one of the following reference signals: DM-RS, CSI-RS, PT-RS or RLM-RS.

The transmission resource information may include at least one of the following information: information of a first resource, where the first resource is a resource for the first terminal device to send the first data to the second terminal device; or, the information of the second resource information, the second resource is the resource for the first terminal device to send the first control information to the second terminal device; or information about the third resource, the third resource is the resource for transmitting the second data, the The second data is the data received by the first terminal device from the second terminal device; or, the information of the fourth resource, the fourth resource is the resource for transmitting the second control information, and the second control information is the Control information received by the first terminal device from the second terminal device.

The second parameter may further include at least one of the following information: geographic location information; or, number of retransmissions; or, subcarrier spacing; or, transmission mode, which may include unicast, multicast, or broadcast; or , the indication information of a specific field in the first control information, where the first control information is the control information sent by the first terminal device to the second terminal device; or, the indication information of a specific field in the second control information, The second control information is the control information received by the first terminal device from the second terminal device; or, the indication information of the downlink control information DCI for the sidelink received from the network device.

The reference signal may further include at least one of the following reference signals: DM-RS for the first data; or DM-RS for the first control information; or RS for carrying the first control information ; wherein the first control information is used to indicate the first data sent by the first terminal device to the second terminal device, or the first control information is sent by the first terminal device to the second terminal device feedback information.

Exemplarily, the first resource may include the second resource. And/or, the third resource may include the fourth resource.

If the first parameter includes the root sequence number of the sequence, the processor 803 can determine the root sequence number of the sequence according to the following formula:

u=f(x)modM;

Wherein, u is the root sequence number, f(x) is a function of the second parameter, x represents the second parameter, mod M represents modulo M, and M is a positive integer.

If the first parameter includes the root sequence number of the sequence, the processor 803 may determine a sequence hop according to the second parameter, and determine the first parameter according to the sequence hop; and/or, the processor 803 may The sequence group hop is determined according to the second parameter, and the first parameter is determined according to the group hop.

If the first parameter includes the cyclic shift of the sequence, the processor 803 can determine the cyclic shift of the sequence according to the following formula:

Wherein, α is the cyclic shift, h(x) is a function of the second parameter, x represents the second parameter, mod N represents modulo N, and N is the length of the sequence.

If the first parameter includes the orthogonal cover code bits of the sequence, the processor 803 can determine the index of the orthogonal cover code of the sequence according to the following formula:

n_occ=q(x)mod K;

Wherein, n_occ is the index of the orthogonal cover code, q(x) is a function of the second parameter, x represents the second parameter, mod K represents modulo K, and K is a positive integer.

If the sequence includes a random sequence, and the first parameter includes the sequence initial value of the sequence, the processor 803 may determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *N ₂ +N ₃ +f(x))mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *(N ₁ +f(x))*N ₂ +N ₃ )mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *(N ₂ +f(x))+N ₃ )mod(2 ³¹ );

Wherein, c _init is the sequence initial value of the sequence, f(x) is the function of the second parameter, x represents the second parameter, mod represents the modulo operation, m, N ₁ , N ₂ and N ₃ is the default integer.

If the sequence includes a random sequence and the first parameter includes the initial position of the sequence, the processor 803 can determine the initial position of the sequence according to the following formula:

Δ=f(x);

Wherein, Δ is the initial position, f(x) is a function of the second parameter, and x represents the second parameter.

Exemplarily, when sending the reference signal, the transceiver 801 may send the reference signal on two adjacent symbols in the time domain. Specifically, the transceiver 801 may transmit the same reference signal at the same frequency domain position on two adjacent symbols in the time domain.

When implementing the function of the first terminal device, the processor 803 may determine a first parameter, where the first parameter is used to generate a sequence of reference signals, the first parameter is determined according to a second parameter, and the second parameter may include information for identifying the transmission link and/or transmission resource information. The transceiver 801 can also detect the reference signal from the received signal according to the first parameter.

The transceiver 801 may receive the first parameter from a network device and/or a first terminal device, and the reference signal is sent by the first terminal device. In addition, the transceiver 801 may also receive the second parameter from the network device and/or the first terminal device, and the reference signal is sent by the first terminal device, after which the processor may The second parameter determines the first parameter.

The first parameter involved in the present application may include at least one of the following: the root sequence number of the sequence, the cyclic shift value of the sequence, and the orthogonal cover code of the sequence. In addition, if the sequence includes a random sequence, the first parameter may further include the sequence initial value of the sequence and/or the initial position of the sequence.

In implementation, the information used to identify the transmission link may include at least one of the following information: the identification of the first terminal device; or the identification of the second terminal device; or the source identification; or the destination identification; or , the joint identifier of the first terminal device and the second terminal device; or the joint identifier of the source identifier and the destination identifier; or the RNTI configured by the network device for the first terminal device; or the network device is the The RNTI configured by the second terminal device; or the RNTI configured by the network device for the first terminal device and the second terminal device; or the HARQ process number; transmission between the device and the second terminal device.

The reference signal may include at least one of the following reference signals: DM-RS, CSI-RS, PT-RS or RLM-RS.

The transmission resource information may include at least one of the following information: information of a first resource, where the first resource is a resource for the first terminal device to send the first data to the second terminal device; or, the information of the second resource information, the second resource is the resource for the first terminal device to send the first control information to the second terminal device; or information about the third resource, the third resource is the resource for transmitting the second data, the The second data is the data received by the first terminal device from the second terminal device; or, the information of the fourth resource, the fourth resource is the resource for transmitting the second control information, and the second control information is the Control information received by the first terminal device from the second terminal device. The reference signal is sent by the first terminal device.

The second parameter may further include at least one of the following information: geographic location information; or, number of retransmissions; or, subcarrier spacing; or, transmission mode, which may include unicast, multicast, or broadcast; or , the indication information of a specific field in the first control information, where the first control information is the control information sent by the first terminal device to the second terminal device; or, the indication information of a specific field in the second control information, The second control information is the control information received by the first terminal device from the second terminal device; or, the indication information of the downlink control information DCI for the sidelink received from the network device. The reference signal is sent by the first terminal device.

The reference signal may include at least one of the following reference signals: the DM-RS of the first data; or the DM-RS of the first control information; or the RS that carries the first control information; The first control information is used to indicate the first data sent by the first terminal device to the second terminal device, or the first control information is the first data sent by the first terminal device to the second terminal device. Feedback.

The reference signal may further include at least one of the following reference signals: DM-RS for the first data; or DM-RS for the first control information; or RS for carrying the first control information ; wherein, the first control information is used to indicate the first data sent by the first terminal device to the second terminal device, or the first control information is sent by the first terminal device to the second terminal device Feedback information of the terminal device, the reference signal is sent by the first terminal device.

Exemplarily, the first resource may include the second resource. And/or, the third resource may include the fourth resource.

If the first parameter includes the root sequence number of the sequence, the processor 803 may determine the root sequence number of the sequence according to the following formula:

u=f(x)modM;

Wherein, u is the root sequence number, f(x) is a function of the second parameter, x represents the second parameter, mod M represents modulo M, and M is a positive integer.

If the first parameter includes the root sequence number of the sequence, the processor 803 may determine the sequence hop according to the second parameter, and determine the first parameter according to the sequence hop; and/or, the processor may determine the sequence hop according to the sequence hop; The second parameter determines the sequence group hop, and the first parameter is determined according to the group hop.

If the first parameter includes the cyclic shift of the sequence, the processor 803 can determine the cyclic shift of the sequence according to the following formula:

Wherein, α is the cyclic shift, h(x) is a function of the second parameter, x represents the second parameter, mod N represents modulo N, and N is the length of the sequence.

If the first parameter includes the orthogonal cover code bits of the sequence, the processor 803 can determine the index of the orthogonal cover code of the sequence according to the following formula:

n_occ=q(x)mod K;

Wherein, n_occ is the index of the orthogonal cover code, q(x) is a function of the second parameter, x represents the second parameter, mod K represents modulo K, and K is a positive integer.

If the sequence includes a random sequence, and the first parameter includes the sequence initial value of the sequence, the processor 803 can determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *N ₂ +N ₃ +f(x))mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *(N ₁ +f(x))*N ₂ +N ₃ )mod(2 ³¹ );

Alternatively, determine the sequence initial value of the sequence according to the following formula:

c _init =(2 ^m *N ₁ *(N ₂ +f(x))+N ₃ )mod(2 ³¹ );

Wherein, c _init is the sequence initial value of the sequence, f(x) is the function of the second parameter, x represents the second parameter, mod represents the modulo operation, m, N ₁ , N ₂ and N ₃ is the default integer.

If the sequence includes a random sequence, and the first parameter includes the initial position of the sequence, the processor 803 can determine the initial position of the sequence according to the following formula:

Δ=f(x);

Wherein, Δ is the initial position, f(x) is a function of the second parameter, and x represents the second parameter.

The communication device provided by the embodiment of the present application may also be implemented through a modular structure. As shown in FIG. 9 , the structure of the communication device provided by the embodiment of the present application may include a transceiver unit 901 and a processing unit 902 .

When the functions of the first terminal device and/or the second terminal device provided by the embodiment of the present application are implemented through the structure shown in FIG. 9 , the steps performed by the transceiver unit 901 and the processing unit 902 may be referred to above for the steps shown in FIG. 8 . The description of the steps performed by the transceiver 801 and the processor 803 in the communication device is shown, which will not be repeated here. Specifically, the transceiver unit 901 may be configured to perform the steps performed by the transceiver 801 in the communication device shown in FIG. 8 , and the processing unit 902 may be configured to perform the steps performed by the processor 803 in the communication device shown in FIG. 8 .

Based on the same concept as the above method embodiments, the embodiments of the present application further provide a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the computer is made to execute the above method embodiments and method implementations. An operation performed by the first terminal device and/or the second terminal device in any possible implementation manner of the example.

Based on the same concept as the above method embodiments, the present application also provides a computer program product, which, when invoked and executed by a computer, can enable the computer to implement the above method embodiments and any possible implementation manner of the method embodiments. operations performed by the first terminal device and/or the second terminal device.

Based on the same concept as the above method embodiments, the present application further provides a chip or a chip system, the chip is coupled with a transceiver, and is used to implement the above method embodiments and any possible implementation manners of the method embodiments by the first The operation performed by the terminal device and/or the second terminal device. Wherein, "coupling" means that two components are directly or indirectly combined with each other. This combination may be fixed or movable, and this combination may allow flow of fluid, electricity, electrical signals or other types of signals between the two components. communication between them. The chip system may include the chip.

Based on the same concept as the above method embodiments, the present application further provides a communication system, which can be used to implement the above method embodiments and any possible implementation manners of the method embodiments by the first terminal device and/or the first terminal device and/or the first terminal device. Two operations performed by the terminal device. Exemplarily, the communication system has the structure shown in FIG. 1 and/or FIG. 2 .

The embodiments of the present application are described with reference to the flowcharts and/or block diagrams of the methods, apparatuses, and computer program products involved in the embodiments. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a 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 function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Claims (21)

1. A method for transmitting a reference signal, comprising:

the method comprises the steps that a first terminal device generates a reference signal according to a first parameter, the first parameter is used for generating a sequence of the reference signal, and the first parameter is determined according to a second parameter; the second parameter comprises information for identifying the transmission link and/or transmission resource information;

and the first terminal equipment transmits the reference signal.

2. The method of claim 1, further comprising:

the first terminal device indicates the first parameter and/or the second parameter to a second terminal device.

3. The method according to claim 1 or 2, wherein the information for identifying a transmission link comprises at least one of the following information:

an identity of the first terminal device; or

An identity of the second terminal device; or

A source identification; or

A destination identifier; or

A joint identifier of the first terminal device and the second terminal device; or

A joint identifier of the source identifier and the destination identifier; or

The network equipment is a Radio Network Temporary Identifier (RNTI) configured for the first terminal equipment; or

The network equipment is the RNTI configured for the second terminal equipment; or

The network equipment is an RNTI configured for the first terminal equipment and the second terminal equipment; or

A hybrid automatic repeat request, HARQ, process number;

wherein the transmission link is due to a transmission between the first terminal device and the second terminal device.

4. The method of claims 1-3, wherein the reference signal comprises at least one of:

demodulating a reference signal DM-RS; or

A channel state information reference signal, CSI-RS; or

A reference signal for carrying control information; or

A phase tracking reference signal PT-RS; or

A synchronization reference signal; or

The radio link tracking reference signal R L M-RS.

5. The method of any one of claims 1 to 4, wherein the second parameter comprises at least one of the following information:

geographic location information;

the number of retransmissions;

a subcarrier spacing;

the transmission mode comprises unicast, multicast or broadcast;

indication information of a specific field in first control information, wherein the first control information is control information sent by the first terminal device to a second terminal device;

indication information of a specific field in second control information, wherein the second control information is control information received by the first terminal device from a second terminal device;

and receiving indication information of downlink control information DCI for the side link from the network equipment.

6. The method of any one of claims 1 to 5, wherein the first parameter comprises a root sequence number of the sequence, further comprising:

the first terminal device determines a root sequence number of the sequence according to the following formula:

u＝f(x)modM；

wherein u is the root sequence number, f (x) is a function of the second parameter, x represents the second parameter, modM represents modulo M, and M is a positive integer.

7. The method of any one of claims 1 to 6, wherein the first parameter comprises a cyclic shift of the sequence, further comprising:

the first terminal device determines the cyclic shift of the sequence according to the following formula:

where α is the cyclic shift, h (x) is a function of the second parameter, x represents the second parameter, modN represents modulo N, N is the length of the sequence.

8. The method of any one of claims 1 to 7, wherein the first parameter comprises orthogonal cover code bits of the sequence, further comprising:

the first terminal device determines the index of the orthogonal cover code of the sequence according to the following formula:

n_occ＝q(x)modK；

where n _ occ is the index of the orthogonal cover code, q (x) is a function of the second parameter, x represents the second parameter, mod K represents modulo K, and K is a positive integer.

9. The method of any one of claims 1 to 8, wherein the sequence comprises a random sequence, the first parameter comprises a sequence initial value of the sequence, and further comprising:

the first terminal device determines a sequence initial value of the sequence according to the following formula:

c_init＝(2^m*N₁*N₂+N₃+f(x))mod(2³¹)；

alternatively, the sequence initial value of the sequence is determined according to the following formula:

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹)；

alternatively, the sequence initial value of the sequence is determined according to the following formula:

c_init＝(2^m*N₁*(N₂+f(x))+N₃)mod(2³¹)；

wherein, c_initIs the sequence initial value of the sequence, f (x) is a function of the second parameter, x represents the second parameter, mod represents the modulus operation, m, N₁、N₂And N₃Is a preset integer.

10. The method of any one of claims 1 to 9, wherein the sequence comprises a random sequence, wherein the first parameter comprises an initial position of the sequence, and further comprising:

the first terminal device determines the initial position of the sequence according to the following formula:

Δ＝f(x)；

wherein Δ is the initial position, f (x) is a function of the second parameter, and x represents the second parameter.

11. A method for receiving a reference signal, comprising:

the second terminal equipment determines a first parameter, the first parameter is used for generating a sequence of the reference signal, and the first parameter is determined according to the second parameter; the second parameter comprises information for identifying the transmission link and/or transmission resource information;

and the second terminal equipment detects the reference signal from the received signal according to the first parameter.

12. The method of claim 11, wherein the second terminal device determining the first parameter comprises:

the first terminal device receiving the first parameter from the first terminal device; or

The first terminal equipment receives the second parameters from network equipment and/or first terminal equipment, and determines the first parameters according to the second parameters;

wherein the reference signal is transmitted by the first terminal device.

13. The method according to claim 11 or 12, wherein the information for identifying a transmission link comprises at least one of the following information:

an identity of the first terminal device; or

An identity of the second terminal device; or

A source identification; or

A destination identifier; or

A joint identifier of the first terminal device and the second terminal device; or

A joint identifier of the source identifier and the destination identifier; or

The network equipment is an RNTI configured for the first terminal equipment; or

The network equipment is the RNTI configured for the second terminal equipment; or

The network equipment is an RNTI configured for the first terminal equipment and the second terminal equipment; or

A HARQ process number;

the reference signal is sent by the first terminal device, and the transmission link is due to transmission between the first terminal device and the second terminal device.

14. The method of any one of claims 11 to 13, wherein the reference signal comprises at least one of: demodulating a reference signal DM-RS; or

A channel state information reference signal, CSI-RS; or

A reference signal for carrying control information; or

A phase tracking reference signal PT-RS; or

A synchronization reference signal; or

The radio link tracking reference signal R L M-RS.

15. The method according to any of claims 11 to 14, wherein the second parameter comprises at least one of the following information:

geographic location information;

the number of retransmissions;

a subcarrier spacing;

the transmission mode comprises unicast, multicast or broadcast;

indication information of a specific field in first control information, wherein the first control information is control information sent by a first terminal device to a second terminal device;

indication information of a specific field in second control information, wherein the second control information is control information received by the first terminal device from the second terminal device;

receiving indication information of downlink control information DCI for a side link from network equipment;

wherein the reference signal is transmitted by the first terminal device.

16. The method according to any of claims 11 to 15, wherein the first parameter comprises a root sequence number of the sequence, and the second terminal device determines the first parameter comprising:

the second terminal device determines a root sequence number of the sequence according to the following formula:

u＝f(x)modM；

where u is the root sequence number, f (x) is a function of the second parameter, x represents the second parameter, mod M represents modulo M, and M is a positive integer.

17. The method of any of claims 11 to 16, wherein the first parameter comprises a cyclic shift of the sequence, and wherein the second terminal device determines the first parameter, comprising:

the second terminal device determines the cyclic shift of the sequence according to the following formula:

where α is the cyclic shift, h (x) is a function of the second parameter, x represents the second parameter, mod N represents modulo N, N is the length of the sequence.

18. The method of any of claims 11 to 17, wherein the first parameter comprises orthogonal cover code bits of the sequence, and wherein the determining of the first parameter by the second terminal device comprises:

the second terminal device determines the index of the orthogonal cover code of the sequence according to the following formula:

n_occ＝q(x)mod K；

where n _ occ is the index of the orthogonal cover code, q (x) is a function of the second parameter, x represents the second parameter, mod K represents modulo K, and K is a positive integer.

19. The method according to any of claims 11 to 18, wherein the sequence comprises a random sequence, the first parameter comprises a sequence initial value of the sequence, and the second terminal device determines the first parameter comprising:

the second terminal device determines a sequence initial value of the sequence according to the following formula:

c_init＝(2^m*N₁*N₂+N₃+f(x))mod(2³¹)；

alternatively, the sequence initial value of the sequence is determined according to the following formula:

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹)；

alternatively, the sequence initial value of the sequence is determined according to the following formula:

c_init＝(2^m*N₁*(N₂+f(x))+N₃)mod(2³¹)；

wherein, c_initFor the sequence initial value of the sequence, f (x) is a function of the second parameter, x denotes the second parameter, mod denotes the valueModulo operation, m, N₁、N₂And N₃Is a preset integer.

20. The method of any of claims 11 to 19, wherein the sequence comprises a random sequence, the first parameter comprises an initial position of the sequence, the second terminal device determines the first parameter, further comprising:

the second terminal device determines the initial position of the sequence according to the following formula:

Δ＝f(x)；

wherein Δ is the initial position, f (x) is a function of the second parameter, and x represents the second parameter.

21. A communication device comprising a transceiver, a memory, and a processor;

the transceiver is used for the communication device to communicate;

the memory for storing a computer program;

the processor is configured to invoke and execute the computer program from the memory, so that the communication apparatus performs the communication method according to any one of claims 1 to 10, and/or performs the communication method according to any one of claims 11 to 20, based on the transceiver.

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