CN111436127A

CN111436127A - Reference signal sending method and device

Info

Publication number: CN111436127A
Application number: CN201910028234.XA
Authority: CN
Inventors: 黎超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2020-07-21
Also published as: WO2020143724A1

Abstract

The application provides a reference signal sending method and device. According to the method, the first terminal device may generate a reference signal according to a first parameter, wherein the first parameter is used for generating the sequence of the reference signal, the first parameter may be determined according to a second parameter, and the second parameter comprises information for identifying the transmission link and/or transmission resource information. Thereafter, the first terminal device may transmit the reference signal. By adopting the method, the first terminal equipment can generate the reference signal according to the information for identifying the transmission link and/or the transmission resource information so as to reduce the signal interference when the reference signal is transmitted.

Description

Reference signal sending method and device

Technical Field

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

Background

Low-latency and highly reliable transmission technology in New Radio (NR) communication technology is being researched by 3GPP for New application scenarios and brick carving, such as autopilot, 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 latency, the requirement that the end-to-end transmission latency does not exceed 3ms, or the end-to-end latency requirement of maximally not exceeding 10ms is to be achieved. In terms of reliability, it is required to achieve 99.999% or 99.9999% transmission. Therefore, how to realize low-latency and highly reliable transmission is a key technology in 5G. To realize highly reliable and low-implementation wireless transmission, a problem of reference signal transmission in an interference environment needs to be solved. 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, thereby affecting the delay and reliability of the whole system.

Therefore, in low-latency and high-reliability transmission, how NR realizes high-reliability transmission of a reference signal is an issue to be solved.

Disclosure of Invention

The application provides a reference signal sending method and device, which are used for reducing interference of reference signals and improving reliability when the reference signals are sent.

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

By adopting the method, the first terminal equipment can generate the reference signal according to the information for identifying the transmission link and/or the transmission resource information so as to reduce the signal interference when the reference signal is transmitted.

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

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

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

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

In one possible design, the information identifying the transmission link may include at least one of: an identity of the first terminal device; or, an identity of the second terminal device; or, a source identification; alternatively, the 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 device is an RNTI configured for the first terminal device; or, the network device is an RNTI configured for the second terminal device; or, the network device is an RNTI configured for the first terminal device and the second terminal device; or, HARQ process number; wherein the transmission link is due to a transmission between the first terminal device and the second terminal device.

In one possible design, the reference signal may include at least one of a demodulation reference signal (DM-RS), a channel state information reference signal (CSI-RS), a reference signal for carrying control information, a phase tracking reference signal (PT-RS), a synchronization reference signal, or a Radio link tracking reference signal (Radio L ink Monitoring (R L M) R L M-RS).

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

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

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

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

By adopting the design, the network equipment can indicate a pair of UE performing unicast transmission to generate the reference signal according to the same first parameter, and the first parameter is distributed for the pair of UE and is different from the first parameter distributed for other UE pairs by the network equipment, so that the resource for sending the reference signal by different UE can be coordinated, the interference when the reference signal is sent is further reduced, and better management and coordination effects of the network equipment are realized. In addition, the network device may instruct a group of UEs performing multicast transmission to generate the reference signal according to the same first parameter, and the first parameter is allocated to the group of UEs, and is different from the first parameter allocated to another group of UEs by the network device, so that interference when the reference signal is transmitted can be further reduced.

In one possible design, if the first parameter includes a 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；

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.

In a possible design, if the first parameter includes a 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 group hop according to the second parameter, and determine the first parameter according to the group hop.

In one possible design, if the first parameter includes a cyclic shift of the sequence, the first terminal device may determine 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.

In one possible design, where the first parameter includes orthogonal cover code bits of the sequence, then the first terminal device determines an 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.

In one possible design, if the sequence includes a random sequence and the first parameter includes a 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*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)；

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.

In one possible design, if the sequence includes a random sequence and the first parameter includes an 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 one possible design, the first terminal device may transmit the reference signal on two symbols adjacent in a time domain when transmitting the reference signal.

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

In a second aspect, the present application provides a resource determination method, which may be implemented by a second terminal device. According to the method, the second terminal device may determine a first parameter for generating a sequence of reference signals, said first parameter being determined from a second parameter, which may comprise information for identifying the transmission link and/or transmission resource information. The second terminal device may detect the reference signal from the received signal according to the first parameter.

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

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

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

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

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

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

In one possible design, if the first parameter includes a 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)x represents the second parameter, mod M represents modulo M, M being a positive integer, as a function of the second parameter.

In a possible design, if the first parameter includes a 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 a group hop according to the second parameter, and determine the first parameter according to the group hop.

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

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

n_occ＝q(x)mod K；

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

c_init＝(2^m*N₁*N₂+N₃+f(x))mod(2³¹)；

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹)；

c_init＝(2^m*N₁*(N₂+f(x))+N₃)mod(2³¹)；

In one possible design, if the sequence includes a random sequence and the first parameter includes an 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)；

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

In one possible design, the architecture 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 transmitting or receiving the reference signal. The memory is coupled to the processor for storing program instructions and data necessary for the communication device. The processor is configured to enable the communication device to perform corresponding functions in the method provided by the first aspect described above and/or to enable the communication device to perform corresponding functions in the method provided by the second aspect described above, which functions may be implemented by invoking program instructions stored by the memory.

In implementing the functionality of the first terminal device, the processor may be configured to generate a reference signal according to a first parameter, wherein the first parameter is used to generate a sequence of the reference signal, and the first parameter may be determined according to a second parameter, and the second parameter includes information for identifying a 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 based on the second parameter.

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

In one possible design, the transceiver may also transmit the first parameter and/or the second parameter to the second terminal device to cause the second terminal device to determine the sequence of reference signals according to the first parameter.

In one possible design, if the first parameter includes a 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；

In one possible design, if the first parameter includes a 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 a group hop according to the second parameter, and determine the first parameter according to the group hop.

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

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

n_occ＝q(x)mod K；

In one possible design, if the sequence includes a random sequence and the first parameter includes a 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*N₁*N₂+N₃+f(x))mod(2³¹)；

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹)；

c_init＝(2^m*N₁*(N₂+f(x))+N₃)mod(2³¹)；

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

Δ＝f(x)；

In one possible design, the transceiver may transmit the reference signal on two symbols adjacent in the time domain when transmitting the reference signal.

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

In implementing the functionality of the first terminal device, the processor may determine a first parameter for generating a sequence of reference signals, the first parameter being determined in dependence of a second parameter, which may comprise information for 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 one possible design, the transceiver may receive the first parameter from a network device and/or a first terminal device, and the reference signal is transmitted by the first terminal device.

In one possible design, the transceiver may further receive the second parameter from a network device and/or a first terminal device, the reference signal being transmitted by the first terminal device, and the processor may determine the first parameter based on the second parameter.

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

u＝f(x)modM；

n_occ＝q(x)mod K；

c_init＝(2^m*N₁*N₂+N₃+f(x))mod(2³¹)；

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹)；

c_init＝(2^m*N₁*(N₂+f(x))+N₃)mod(2³¹)；

Δ＝f(x)；

In a fourth aspect, the present application provides a computer storage medium having code stored thereon, where the code, when executed by a computer, may cause the computer to implement the functions of 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 fifth aspect, the present application provides a computer program product. The computer program product may, when called by a computer, cause the computer to implement the functionality of the first terminal device in the method provided by the first aspect and/or the second terminal device in the method provided by 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, where the chip is couplable with a transceiver, and is configured to implement the functions of 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. The chip system may comprise a chip as described above.

Drawings

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

fig. 2 is a block diagram of another wireless communication system provided herein;

fig. 3 is a schematic flow chart of a reference signal generation method provided in the present application;

fig. 4 is a schematic flow chart of another reference signal generation method provided in the present application;

fig. 5 is a block diagram of another wireless communication system provided herein;

fig. 6 is a schematic flow chart of another reference signal generation method provided in the present application;

FIG. 7 is a schematic diagram of a random sequence provided herein;

fig. 8 is a schematic structural diagram of a communication device provided in the present application;

fig. 9 is a schematic structural diagram of another communication device provided in the present application.

Detailed Description

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

The following explains terms related to the embodiments of the present application:

1. at least one means one, or more than one, i.e., including one, two, three, and more than one.

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

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

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

5. Unicast refers to transmission information from one terminal device to another terminal device; multicast means that one terminal device transmits information to a plurality of terminal devices; broadcast means that one terminal device transmits information to all terminal devices in its coverage, and the broadcast is not limited to a specific reception object.

6. ZC sequences, which may also be referred to as Zadoff-Chu sequences, or Frank-Zadoff-Chu (fzc) sequences or Chu sequences, are one of the perfect sequences. This sequence has ideal periodic autocorrelation properties. The main parameters for generating this sequence are the root sequence number of the sequence, the cyclic shift value.

The ZC sequence may be defined by the following formula:

wherein the content of the first and second substances,

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

Can be generated as follows:

wherein the content of the first and second substances,

7. the Physical Sidelink Feedback Channel (PSFCH) is a channel in which a terminal device carries Sidelink Feedback Control Information (SFCI) on a sidelink in a scenario where feedback is required.

8. A reference signal and a sequence of reference signals. The reference signal is generated from a sequence of reference signals. Specifically, the sequence of the reference signal that is usually generated directly may be a real sequence or a complex sequence. When the sequence is a real number sequence, the sequence can be a binary string with a certain length composed of {0, 1}, or a symbol string composed of { -1, 1}, and can also be a symbol string with a certain length composed of other real numerical values. In the case of a complex sequence, only the corresponding sequence symbols are complex. And according to the determined sequence of the reference signals, obtaining mapping symbols of the reference signals directly mapped to specific time frequency resources, and then mapping the mapping symbols of the reference signals to the time frequency resources where the reference signals are located to form the reference signals.

Hereinafter, embodiments of the present application will be described in detail with reference to the drawings. First, a wireless communication system provided in an embodiment of the present application is introduced, a reference signal transmission method provided in the present application is applicable to the system, then a signal transmission method provided in the embodiment of the present application is introduced, and finally a communication apparatus provided in the embodiment of the present application is introduced.

As shown in fig. 1, the wireless communication System provided in the embodiment of the present invention may include a UE101 and a UE 102. optionally, the wireless communication System may further include a network device 103. it should be understood that the application scenarios of the wireless communication System provided in the embodiment of the present invention include, but are not limited to, a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General packet Radio Service (General packet Radio Service, GPRS), a long Term Evolution (L ong Term Evolution, L TE) System, a L TE Frequency Division Duplex (Frequency Division Duplex, FDD) System, a L TE Time Division Duplex (Time Division Duplex, TDD), a Universal Mobile communication System (Universal Mobile telecommunications System, UMTS, Microwave networking, etc.), a future Radio network Access (NR 5) System, a wireless network Access (wireless network Access) System, a future Radio network Access (Microwave Access network) System, a future Radio network Access (NR 5) System, a wireless network Access (Microwave Access network) System, a wireless network Access network (wireless network Access network) System, a future Radio network Access (wlan) System, a wireless network Access network (wireless network) System, a wireless network Access network System, a wireless network Access network (wireless network Access network) System, a wireless network Access network System, a wireless network Access network System, a wireless network Access network.

For example, the UE101, 102 can be a terminal (terminal), a Mobile Station (MS), a mobile terminal (mobile terminal), etc., and the UE101 can communicate with one or more network devices of one or more communication systems and can receive network services provided by the network devices, which can include, but are not limited to, the illustrated network device 103. For example, the

UEs

101 and 102 in the embodiments of the present application may be mobile phones (or "cellular" phones), computers with mobile terminals, and the like, and the

UEs

101 and 102 may also be portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices. The UE101 and the UE102 may be communication chips having a communication function. In the embodiment of the present application, the

UEs

101 and 102 may be configured to support sidelink transmission.

The network device 103 may include a Base Station (BS), or include a Base station and a Radio resource management device for controlling the Base station, where the Base station may be a Base Transceiver Station (BTS) in a GSM or CDMA system, or a Base station (NodeB, NB) in a WCDMA system, or may be an evolved node b (eNB or eNodeB) in an L TE system, a small Base station (micro/pico eNB) or a transceiver node (TRP), or may be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the Base station 200 may 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 Base station in a future evolved P L MN network, for example, an NR Base station.

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

UEs

101 and 102. Specifically, the Network device 103 and the UE101 may perform transmission through a Universal User to Network interface (Uu air interface) of the Universal User and the Network, and the Network device 103 may also perform transmission with the UE102 through the Uu air interface. In addition, sidelink transmission may be performed between the UE101 and the UE102 through sidelink resources, where the UE101 may be a sending end device of the sidelink transmission, and then the UE102 may be a receiving end device in the sidelink transmission, or the UE102 may be a sending end device in the sidelink transmission, and the UE101 may be a receiving end device in the sidelink transmission.

Optionally, the communication link between the terminal device and the terminal device may be a device-to-device (D2D) link, or an edge link. In the internet of vehicles, the communication link between the end devices and the end devices may also be a vehicle-to-vehicle (V2V) link, a vehicle-to-pedestrian (V2P) link, a vehicle-to-infrastructure (V2I) link, or a vehicle-to-any device (V2X) link. In the following embodiments of the present application, the side link/first link is mainly used to describe communication transmission between the terminal device and the network device, and the cellular link/second link is used to describe communication transmission between the network device and the terminal device. The side link may perform at least one of unicast, multicast, and broadcast communication between the terminal devices.

An application scenario of the wireless communication system provided in the embodiment of the present application is further described below by taking the car networking scenario shown in fig. 2 as an example.

As shown in fig. 2, the wireless communication system in the car networking scenario may include a plurality of car-mounted devices (located in vehicles, such as UE1, UE2, and UE3 shown in fig. 2, which may be located in different vehicles, respectively), and the plurality of car-mounted devices may communicate with each other, such as through sidelink transmission. The wireless communication system may also include one or more base station devices (e.g., enbs and/or gnbs) that may communicate with various vehicle-mounted devices and/or Road Side Units (RSUs). The wireless communication system may further include one or more RSUs, which may communicate with respective vehicle-mounted devices and/or base station devices, and the function of the RSUs may also be implemented by one vehicle-mounted device or one base station device. The RSU can be used for vehicle identification, vehicle violation behavior identification and other functions. The wireless communication system may also 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 a reference signal provided in the embodiment of the present application may be applied to communication between a plurality of vehicle-mounted devices in a wireless communication system as shown in fig. 2.

Specifically, the vehicle-mounted devices move at a high speed along with the vehicle, and when the terminal devices travel in opposite directions, the maximum relative movement speed is achieved, for example, when the vehicle where the UE3 is located and the vehicle where the UE1 is located travel in different travel directions of the same road, respectively, at this time, the relative movement speed between the UE3 and the UE1 is the maximum, in order to ensure the reliability of communication between the terminal devices, communication between the communication devices in the wireless communication system shown in fig. 2 (e.g., between a plurality of vehicle-mounted devices, between a vehicle-mounted device and a base station device, between a vehicle-mounted device and an RSU, and so on) may use a spectrum of a cellular link for communication, or may use an intelligent traffic spectrum around 5.9GHz for communication, and the technology for communication between the communication devices may be enhanced based on L TE protocol or based on D2D technology.

As shown in fig. 3, a method for sending a reference signal according to an embodiment of the present application may include the following steps:

s101: the 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, the first parameter is determined according to a second parameter, and the second parameter can comprise information for identifying a transmission link and/or transmission resource information;

s102: the first terminal device transmits a reference signal. In implementation, the first terminal device may send the reference signal to another terminal device (e.g., a second terminal device) or a network device, which is not limited in this application.

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 apparatus in the wireless communication system provided in the present application, such as the UE101 or the UE102 in the wireless communication system shown in fig. 1, or may be any one of the UE1, the UE2, the UE3, and the RSU in the wireless communication system shown in fig. 2. The second terminal device may be another communication apparatus 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 first terminal device and the second terminal device may transmit through sidelink, or may transmit through Uu air interface or backhaul link (backhaul). Specifically, if the wireless communication system has a network device, for example, one or more of the network device 103 shown in fig. 1, an eNB shown in fig. 2, or a gNB exists, the first terminal device and the second terminal device may respectively implement transmission through a Uu air interface with the network device, but the possibility of performing sidelink transmission between the first terminal device and the second terminal device when the wireless communication system has the network device is not excluded, for example, only one of the first terminal device and the second terminal device is located within a coverage area of a wireless cell signal provided by the network device. If the wireless communication system does not have network equipment, sidelink transmission can be carried out between the first terminal equipment and the second terminal equipment.

In practice, the second parameter to which the present application relates may comprise information for identifying the transmission link. The information may be used to identify a transmission link between the first terminal device and the second terminal device.

Specifically, the second parameter may include part or all of the following information: an identifier of the first terminal device, an identifier of the second terminal device, a destination identifier, information for identifying a unicast link, information for identifying a multicast link, a joint identifier of the first terminal device and the second terminal device, a joint identifier of the source identifier and the destination identifier, a terminal identifier of the first terminal device and the second terminal device, a terminal group identifier of a terminal group in which the first terminal device and the second terminal device are located, a Radio Network Temporary Identifier (RNTI) configured for the first terminal device by the network device, an RNTI configured for the second terminal device by the network device, an RNTI configured for the first terminal device and the second terminal device by the network device, or a hybrid automatic repeat request (HARQ) process number.

The above-described markers will be further described below.

The identifier of the first terminal device may be a Media Access Control (MAC) identifier of the UE, a network identifier, an identifier configured by the base station (e.g., an RNTI of the first terminal device or other numbers that can uniquely identify the first terminal device.

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

Information identifying a unicast link. For example: for uniquely associating or determining the identity of a unicast link.

And the joint identification of the first terminal equipment and the second terminal equipment. 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 identifiers or a combination of some identifiers taken out of each of them. Or a combination of the source identity and the destination identity instead of or indicating the joint identity of the first terminal device and the second terminal device.

And the terminal pair of the first terminal equipment and the second terminal equipment identifies. For example, the identifier may be configured when the network performs unicast communication for the first terminal device and the second terminal device performing unicast communication. For example, the RNTI of the UE pair is used in Downlink Control Information (DCI) transmitted to the first terminal apparatus and the second terminal apparatus pair via the cellular link.

And the terminal group identifier of the terminal device group where the first terminal device and the second terminal device are located. For example, the identifier may be configured by the network for a plurality of devices performing multicast communication. For example, the RNTI used in the DCI information transmitted to the terminal group where the first terminal device and the second terminal device are located through the cellular link.

And the network equipment configures the identifier for the first terminal equipment. E.g., an RNTI used in DCI information sent over a cellular link to the first terminal device.

And the network equipment is configured for the second terminal equipment. E.g., an RNTI used in DCI information sent over a cellular link to the second terminal device.

The network device is configured with HARQ process numbers for the first terminal device and the second terminal device.

In the above manner, the first terminal device may 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 may be used as the second parameter, and the first terminal device and the second terminal device may generate the reference signal according to the second parameter, so that interference between the reference signal sent between the first terminal device and the second terminal device and other reference signals may be reduced, and the communication reliability of the first terminal device and the second terminal device in the unicast mode is improved. When the first terminal device transmits to a plurality of 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 and the plurality of terminal devices can both generate the reference signal according to the second parameter, so that the interference between the reference signal sent between the first terminal device and the plurality of terminal devices and other reference signals can be reduced, and the communication reliability of the first terminal device and the plurality of terminal devices in the multicast mode can be improved.

In addition, in an implementation, the second parameter referred to in the present application may include transmission resource information. In particular, when the first terminal device transmits the first data to the second terminal device, the second parameter may include a resource (hereinafter referred to as a first resource) for the first terminal device to transmit the first data, which may include a time domain and/or a frequency domain resource. For example, the second parameter may include a number of a first sub-channel or Physical Resource Block (PRB) where a physical sidelink shared channel (pscch) carrying the first data is located; alternatively, the second parameter may include the number of the PRB or the middle sub-channel where the psch is located; or the second parameter may include the number of the last sub-channel or PRB on which the psch is located; alternatively, the second parameter may include the number of the sub-channel or PRB on which the PSSCH is configured or indicated through signaling. 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 signal (PT-RS) transmitted in the same slot as the psch.

When the first terminal device transmits the first control information to the second terminal device, the second parameter may include a resource (hereinafter, referred to as a second resource, the first resource may include the second resource) in which the first terminal device transmits the first control information, and the resource may include a time domain and/or a frequency domain resource. For example, the second parameter may include a number of a first sub-channel or PRB on which a Physical Sidelink Control Channel (PSCCH) carrying the first control information is located; alternatively, the second parameter may include the number of the intermediate sub-channel or PRB where the PSCCH is located; or the second parameter may comprise the number of the last sub-channel or PRB in which the PSCCH is located; alternatively, the second parameter may include the number of the sub-channel or PRB on which the PSCCH is configured or indicated through signaling. At this time, the reference signal may be a DM-RS of the first control information or a pilot signal (RS) carrying the first control information. The first control information may be used to indicate 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 an SFCI, the second parameter may further include a number of a first sub-channel or a PRB where the PSFCH carrying the SFCI is located; alternatively, the second parameter may include the number of the intermediate sub-channel or PRB where the PSFCH is located; or the second parameter may include the number of the last sub-channel or PRB where the PSFCH is located; alternatively, the second parameter may include the number of the sub-channel or PRB on which the PSFCH is configured or indicated through signaling.

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

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 position field indicated by the SCI, so that the first terminal device and/or the second terminal device may use a value of the MCS field, a value of the resource allocation field, or a value of the time domain position 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) in which the second terminal device transmits the second data, and the resource may include a time domain and/or a frequency domain resource. For example, the second parameter may include the number of the first sub-channel or PRB on which the PSSCH carrying the second data is located; alternatively, the second parameter may include the number of the PRB or the middle sub-channel where the psch is located; or the second parameter may include the number of the last sub-channel or PRB on which the psch is located; or the second parameter may include the number of the sub-channel or PRB on which the PSSCH is configured or indicated through signaling.

When the first terminal device receives the second control information from the second terminal device, the second parameter may include a resource (hereinafter, referred to as a fourth resource, and the third resource may include the fourth resource) in which the second terminal device transmits the second control information, and the resource may include a time domain and/or a frequency domain resource. For example, the second parameter may include the number of the first sub-channel or PRB where the PSCCH carrying the second control information is located; alternatively, the second parameter may include the number of the middle sub-channel or PRB where the PSCCH is located, or the second parameter may include the number of the last sub-channel or PRB where the PSCCH is located; or the second parameter may include the number of the sub-channel or PRB on which the PSCCH is configured or indicated through signaling. In addition, if the second control information is an SFCI, the second parameter may further include a number of a first sub-channel or a PRB where the PSFCH carrying the SFCI is located, or the second parameter may include a number of a middle sub-channel or a PRB where the PSFCH is located, or the second parameter may include a number of a last sub-channel or a PRB where the PSFCH is located.

By adopting the above design, the first terminal device may 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, and may mitigate interference generated between the reference signal generated according to the sequence and the reference signal sent by the other communication apparatus.

In addition, the second parameter may further include indication information or a value of a certain field in the above second control information. For example, the second control information is the 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 may use a value of the MCS field, a value of the resource allocation field, or a value of the time domain location field in the SCI as the second parameter.

In addition, the second parameter may further include some or all of geographical location information, indication information in DCI for a sidelink link received from a network device, an identifier of sidelink HARQ for unicasting, an identifier of sidelink HARQ for multicasting, information indicating whether retransmission is currently performed, information indicating the number of transmissions currently performed, a currently used resource region identifier (ZoneID), a subcarrier interval for transmitting a reference signal, and transmission mode information. Thus, the reference signal generated according to the above second parameter can be further distinguished from other reference signals, reducing interference between the reference signals.

Optionally, the geographical location information may include GNSS coordinates of the first terminal device and/or the second terminal device, or location information determined based on GNSS standards.

Optionally, the indication information in the DCI for the sidelink link, which is received by the first terminal device and/or the second terminal device from the network 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, the first terminal device and/or the second terminal device may use 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.

Optionally, the information for indicating 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.

Alternatively, the information for indicating the transmission number of the current transmission may include the transmission number of times when one transmission is performed, such as 1 time, 2 times, 4 times, and the like.

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

Alternatively, the subcarrier spacing for transmitting the reference signal may be 15kHz, 30kHz, 60kHz, 120kHz, or the like.

Alternatively, the transmission mode information may include any one of unicast, multicast, broadcast, and the like.

When the above information is used, a value indicating all fields or all of the information may be used, or a value indicating a part of the information may be used. The invention is not limited in this regard.

In this embodiment of the present application, the reference signal related to the method shown in fig. 3 may be further configured to use a feedback channel to carry feedback information, where the feedback information may be carried by a sequence of the reference signal or may be carried by control information coding bits in the feedback channel, and the RS or DM-RS. reference signal, where the feedback channel may carry the feedback information, may further include a DM-RS used by a data channel physical downlink shared channel (psch), a DM-RS used by a physical downlink control channel (PSCCH), an RS used for Channel State Information (CSI) measurement or radio resource management (radio resource management, or radio link tracking (radio link monitoring, R L M) measurement, such as a sounding reference signal (sounding reference, PT), a tracking-RS, a radio link tracking-RS (RRM-RS), or a radio link synchronization RS (SRS-broadcast channel) used for the above-mentioned synchronization scheme, or the invention is not limited to the above-RS or the SRS-8652.

In addition, in implementation, the reference signal described herein may be replaced with a scrambling sequence. Specifically, the first terminal device may determine a 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, the scrambling sequence may be used to scramble the data or control information to be transmitted, and the receiving end device of the data or control information may descramble according to the scrambling sequence to obtain the data or control information. Specifically, the first terminal device may scramble bits of data or control information to be transmitted according to the following method:

wherein

Is the bits after scrambling, b (i) is the bits before scrambling, c (i) is the scrambling sequence generated according to the embodiments of the present application, mod denotes the modulo operation.

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

s103: a first terminal device generates a scrambling sequence according to a first parameter, wherein the first parameter is determined according to a second parameter, the second parameter can include information for identifying a transmission link and/or transmission resource information, and the scrambling sequence is used for scrambling data or control information to be transmitted in the first terminal device;

s104: the first terminal device transmits the scrambling sequence. In implementation, the first terminal device may send the scrambling sequence to another terminal device (e.g., a second terminal device) or a network device, which is not 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 based on the second parameter, and the first terminal apparatus may generate a sequence of reference signals based on the first parameter and then generate the reference signals based on the sequence. In addition, the first terminal device may also receive the second parameter from the network device, generate the first parameter according to the second parameter, generate a sequence of reference signals according to the first parameter, and generate the reference signals according to the sequence.

In further implementations, the first terminal device may also receive the first parameter from the second terminal device prior to the step shown in S101. The first parameter may be determined by the second terminal device based on the second parameter, and the first terminal device may generate a sequence of reference signals based on the first parameter and then generate the reference signals based on the sequence. Alternatively, the first terminal device may receive the second parameter from the second terminal device, generate the first parameter based on the second parameter, generate a sequence of reference signals based on the first parameter, and generate the reference signals based on 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 Block (SIB) signaling. Specifically, the second parameter may be indicated by a value of a certain field in DCI or RRC signaling, where the DCI or RRC signaling may be used to indicate a transmission resource allocated by the network device to the first terminal device and/or the second terminal device, and the transmission resource may 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, where the DCI may carry UE-paged RNTI of the first terminal device and the second terminal device, and at this time, the UE-paged RNTI may also be used as the second parameter; if the first terminal device and the plurality of terminal devices including the second terminal device perform multicast transmission, the network device may send DCI to the first terminal device and the second terminal device, where the DCI may carry the UE-group RNTI of the terminal device group in which the first terminal device and the plurality of terminal devices are located, and at this time, the UE-group RNTI may also be used as the second parameter. In the multicast mode, the network device may also send the DCI to a management device (group head) in a group of end devices, and the DCI is distributed to the first end device and/or the second end device by the manager device.

The reference signal transmission method provided in the present application is further described below with reference to the accompanying drawings.

Taking fig. 1 as an example, if the UE101 sends data to the UE102 in a unicast mode, the network device 103 may allocate a transmission resource, where the transmission resource is used for the UE101 to send data to the UE102, the network device 103 may indicate the transmission resource through DCI, after the UE101 receives the DCI from the network device 103, the UE may use a UE-scheduled RNTI, a value of an MCS field, a value of a resource allocation field, a value of a time domain location field, or other information in the DCI as a second parameter, and then the UE101 may generate a reference signal according to the second parameter, and send the reference signal to the UE102, where the reference signal may be used to indicate the data sent by the UE101 to the UE 102.

In addition, in the above example, the network device 103 may further indicate the transmission resource to the UE102 through the DCI, and the UE102 may use a UE-scheduled RNTI, a value of an MCS field, a value of a resource allocation field, a value of a time domain location field, or other information in the DCI as the second parameter. The UE101 may further indicate the second parameter to the UE102 after generating the reference signal according to the second parameter, for example, the UE101 may indicate the second parameter to the UE102 through indication information or a value of a certain field in the SCI sent to the UE 102. The UE102 may thus determine the second parameter from transmission resource information used when the UE101 transmits data to the UE 102.

In this embodiment of the application, in the unicast mode, after determining the second parameter, the UE102 may determine the first parameter according to the second parameter, and detect the reference signal sent by the UE101 according to the first parameter. The UE102 may also determine a reference signal according to the first parameter, the reference signal being usable to indicate data transmitted by the UE102 to the UE 101; alternatively, the UE102 may determine the first parameter according to the second parameter and send feedback information to the UE101 according to the first parameter. Specifically, the UE102 may determine a 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, where the reference signal may be used to carry feedback information sent by the UE102 to the UE101, and the feedback information may be carried in the PSFCH.

As shown in fig. 4, when the UE101 transmits a reference signal to the UE102 in a unicast manner, the method for transmitting a reference signal according to the embodiment of the present application may include the following steps:

s201: the UE101 determines a first parameter.

S202: the UE101 generates a reference signal according to the first parameter.

S203: the UE101 transmits the reference signal to the UE102 in a unicast manner.

S204: the UE102 detects a reference signal transmitted by the UE101 in the received signal according to the first parameter. Prior to S204, UE102 may determine a first parameter according to the methods provided herein.

It should be appreciated that, in the above example, the UE101 may also determine the first parameter based on the second parameter and use the sequence determined based on the first parameter as a scrambling sequence that may be used to scramble data transmitted by the UE101 to the UE102, which the UE101 may transmit to the UE 102.

As shown in fig. 5, if UE501 sends data to UE 502, UE503, and UE504 in multicast mode, the network device may allocate transmission resources, the transmission resource is used for the UE501 to send data to the UE 502, the UE503, and the UE504, the network device may carry a group identifier of a terminal device group where the UE501, the UE 502, the UE503, and the UE504 are located in DCI, the network device may indicate the transmission resource through the DCI, after the UE501 receives the DCI from the network device, the UE501 may generate a reference signal according to a second parameter, which may be a value of the UE-groupRNTI, the MCS field, the resource allocation field, the time domain location field, or other information in the DCI, and transmits the reference signal to UE 502, UE503 and UE504, the reference signal may be used to indicate data that UE501 transmits to UE 502, UE503, and UE 504.

In addition, in the above example, the network device may further indicate the transmission resource to the UE 502, the UE503 and the UE504 through the DCI, and the UE 502, the UE503 and the UE504 may respectively use a value of the UE-group RNTI, the MCS field, a value of the resource allocation field, a value of the time domain location field or other information in the DCI as the second parameter.

The UE501 may further indicate the second parameter to the UE 502, the UE503, and the UE504 after generating the reference signal according to the second parameter, for example, the UE501 may indicate the second parameter to the UE 502, the UE503, and the UE504 through indication information or a value of a certain field in the SCI. Thus, the UE 502, the UE503, and the UE504 may determine the second parameter according to the indication information or the value of a certain field in the SCI.

In this embodiment of the application, in the multicast mode, after determining the second parameter, the UE 502, the UE503, and the UE504 may determine the first parameter according to the second parameter, and detect the reference signal sent by the UE501 according to the first parameter.

The UE 502, the UE503, and the UE504 may further determine a first parameter according to the second parameter, and generate a reference signal according to the first parameter, where the reference signal may be used to indicate data that the UE 502, the UE503, and the UE504 respectively send to the UE 501; alternatively, after determining the second parameter, the UE 502, the UE503, and the UE504 may determine the first parameter according to the second parameter, and generate a reference signal according to the first parameter, where the reference signal may be used for the UE 502, the UE503, and the UE504 to send feedback information to the UE501 respectively. Specifically, the UE 502 may determine a 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, where the reference signal may be used to carry feedback information sent by the UE 502 to the UE501, and the feedback information may be carried in the PSFCH. The UE503 may also 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, where the reference signal may be used to carry feedback information sent by the UE503 to the UE501, and the feedback information may be carried in the PSFCH. The UE504 may also 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, where the reference signal may be used to carry feedback information sent by the UE504 to the UE501, and the feedback information may be carried in the PSFCH.

As shown in fig. 6, when the UE501 in fig. 5 transmits the reference signal to the UE 502, the UE503 and the UE504 in a multicast manner, the method for transmitting the reference signal according to the embodiment of the present application may include the following steps:

s301: the UE501 determines the first parameter.

S302: the UE501 generates a reference signal according to the first parameter.

S303: the UE501 transmits the reference signal to the UE 502, the UE503, and the UE504 in a multicast manner.

S304: the UE 502, the UE503, and the UE504 detect the reference signal transmitted by the UE501 from the received signal according to the first parameter. Prior to S304, UE 502, UE503, and UE504 may determine the first parameter according to the methods provided herein, respectively.

Optionally, in the present invention, feedback information carried in the signal may be obtained by detecting a reference signal sent by the UE501 in the received signal, or data carried in data or control channel corresponding to the reference signal or data transmitted in the control channel may be obtained. The data or control channel corresponding to the reference signal comprises a demodulation reference signal of the data or control channel; or the reference signal is a reference signal transmitted simultaneously in the same time slot as the data or control channel. Alternatively, the reference signals may be: CSI-RS, PT-RS, RS carrying feedback or control information, etc.

It should be appreciated that, in the above example, the UE501 may also determine the first parameter according to the second parameter, and use a sequence determined according to the first parameter as a scrambling sequence, which may be used to scramble data transmitted by the UE501 to the UE 502, the UE503, and the UE504, and the UE501 may transmit the scrambling sequence to the UE 402, the UE503, and the UE 504.

In the implementation of the step shown in S102, the first terminal device may transmit the reference signal on two symbols adjacent in the time domain. Further, the first terminal device may transmit the same reference signal at the same frequency domain position on two symbols adjacent in the time domain. It is also possible that the first terminal device transmits the same reference signal at different frequency domain positions on two symbols adjacent in the time domain. Alternatively, the first terminal device may transmit 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 signals transmitted when the reference signal and data are not transmitted along with the channel, so that a receiver can use the first symbol with reference signal to perform Automatic Gain Control (AGC). This ensures that the symbols of at least one parameter signal are received completely by the receiver, thereby ensuring reception performance.

In the reference signal transmitting method provided by the present application, a method for determining a first parameter by a first terminal device and/or a second terminal device is described below.

In an 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 (OCC) of the sequence. The sequence may be a ZC sequence or another sequence with a length of not more than 36. It will be appreciated that each of the first parameters may be determined separately based on one or a combination of the second parameters described above.

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

u＝f(x)modM。

where u is the root sequence number of the sequence, f (x) is a function of a second parameter, x represents the second parameter, mod M represents modulo M, and M is a positive integer. Illustratively, M may take the maximum number of root sequences of the sequence, e.g., M may take the length of the sequence. In implementation, x may be a value of a certain second parameter, or x may be a value corresponding to the value of the certain second parameter, and a mapping relationship between the value of the second parameter and the value may be preset in advance. Alternatively, x may be one or more parameters, and when there are multiple parameters, x may be regarded as a variable of the multiple parameters.

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

u ═ a + f (x)) modM; or

u＝(a+b+f(x))modM。

Where u is the root sequence number of the sequence, a and b are integers, f (x) is a function of a second parameter, x represents the second parameter, mod M represents modulo M, and M is a positive integer. Illustratively, M may take the maximum number of root sequences of the sequence.

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

(x) x; or

f (x) c x; or

f(x)＝c*x+d。

Wherein f (x) is a function of the second parameter, x represents the second parameter, and c and d are integers. Alternatively, x may be one or more parameters, and when there are multiple parameters, x may be regarded as a variable of the multiple parameters.

In addition, when the second parameter includes multiple types of parameters (e.g., the second parameter includes UE-ordered RNTI of the first terminal device and the second terminal device in addition to the information including the first resource), f (x) may be expressed as:

(x) xi + xj; or

f (x) ═ c1 xi + c2 xj; or

f(x)＝c1*xi+d1+c2*xj+d2。

Wherein f (x) is a function of the second parameter, x represents the second parameter, xi represents the second parameter of the first class, xj represents the second parameter of the second class, and c1, c2, d1, and d2 are integers. Alternatively, x may be one or more parameters, and when there are multiple parameters, x may be regarded as a variable of the multiple parameters.

In the above embodiments, the values of a, b, c, d, c1, c2, d1 and d2 may be determined according to one or more parameters of a cell identifier, an alternative cell identifier configured by the network device, indication information of a slot in which the reference signal is located, indication information of a symbol in which the reference signal is located, indication information of a subcarrier interval in which the reference signal is transmitted, and an RNTI. In a feasible manner, the parameters a, b, c, d, c1, c2, d1 and d2 may be taken from the parameters (e.g., cell identifier, indication information of a slot where the reference signal is located, indication information of a symbol where the reference signal is located, indication information of a subcarrier interval where the reference signal is transmitted, and RNTI of the first terminal device and/or the second terminal device). Optionally, the values of these parameters may be the same or different.

Illustratively, the root sequence number of a sequence may also be calculated from sequence hops and/or sequence group hops.

u＝(f_gh+f_ss+g₁(x) Mod 30; or

u＝(f_gh+g₁(x) Mod 30; or

u＝(f_ss+g₁(x))mod30。

Wherein u is the root sequence number of the sequence, f_ghFor sequence group hopping, f_ssIs a sequence hop, g₁(x) X represents the second parameter and mod represents the modulo operation as a function of the second parameter.

In practice, f can be determined according to the following formula_ghAnd f_ss：

f_ss＝(n_ID+g₃(x))mod 30

v＝0

Wherein n is_IDA randomized identity representing the configuration of the network,

representing the number of slots in a radio frame at a particular subcarrier spacing μ, m being an integer and representing an intermediate variable, n_hopC () is a random sequence as a parameter indicating whether to frequency hop. g₂(x) And g₃(x) Is a function of x, which represents the second parameter.

Alternatively, f can be determined according to the following formula_ghAnd f_ss：

f_ss＝(n_ID+g₃(x))mod 30

v＝0

representing the number of slots in a radio frame at a particular subcarrier spacing μ, m being an integer and representing an intermediate variable, n_hopC () is a random sequence as a parameter indicating whether to frequency hop. g₂(x) And g₃(x) Is a function of x, which represents the second parameter. Alternatively, x may be one or more parameters, and when there are multiple parameters, x may be regarded as a variable of the multiple parameters.

In the above example, g₁(x)、g₂(x) And g₃(x) The setting of (f), (x) may be referred to. Wherein, g₁(x)、g₂(x) And g₃(x) Different functions of x may be represented, respectively.

Alternatively, the cyclic shift of the sequence may be determined according to the following formula:

In the above example, the setting of h (x) refers to the setting of f (x).

Alternatively, the index of the orthogonal cover code of the sequence may be determined 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. Illustratively, K may be the number of OCC sequences. After n _ occ is determined, the orthogonal cover code can be obtained by searching according to the index of the orthogonal cover code and the corresponding table of the orthogonal cover code.

In the above example, the arrangement of q (x) refers to the arrangement of f (x).

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

Illustratively, taking the gold sequence of which the random sequence is 31 bits long as an example, the sequence initial value of the sequence may be determined according to the following formula:

c_init＝(2^m*N₁*N₂+N₃+f(x))mod(2³¹) (ii) a Or

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹) (ii) a Or

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. For example, the cell identity, the alternative cell identity configured by the base station, the indication information of the slot where the reference signal is located, and the indication of the symbol where the reference signal is locatedAny one or more of information, indication information of subcarrier intervals for transmitting reference signals, CP types, RNTIs and the like. Optionally, the values of these parameters may be the same or different.

For example, the initial position of the sequence may be determined according to the following formula:

Δ＝f(x)。

where Δ is the initial position of the sequence, f (x) is a function of the second parameter, and x represents the second parameter. Alternatively, x may be one or more parameters, and when there are multiple parameters, x may be regarded as a variable of the multiple parameters. The arrangement of f (x) can be referred to the previous description of the embodiments of the present application.

After determining Δ, a new random sequence (hereinafter referred to as a sequence to be used) can be determined or obtained based on the random sequence (hereinafter referred to as an original sequence) according to Δ, and a reference signal is generated according to the sequence to be used, so that the interference resistance of the reference signal is further improved.

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

c(n)＝c0(n+Δ)。

where c is the sequence to be used, c0 represents the original sequence, Δ is an offset value f (x) as a function of the second parameter, x represents the second parameter, n is 0,1, …, M-1, and M is the length of the sequence to be used.

In the above equation, the relationship between the sequence to be used and the original sequence is shown in fig. 7, where Nc denotes an initial offset amount for determining the sequence to be used from the original sequence, where Nc is a positive integer. Alternatively, Nc 1600, for example.

It will be appreciated that after determining the first parameter from the second parameter, a sequence may be generated from the first parameter and a reference signal generated from the sequence. The method for generating the sequence according to the first parameter and generating the reference signal according to the sequence is not particularly limited in the present application.

Based on the same inventive concept as the above method embodiment, the present application embodiment further provides a communication apparatus, which may be used to implement the functions performed by the first terminal device and/or the second terminal device in the above method embodiment. The functions can be realized by hardware, and can also be realized by software or hardware to execute corresponding software. The hardware or software may include one or more modules corresponding to the functions described above.

Illustratively, 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 may be used for communication by a communication device, such as for transmitting or receiving the reference signals described above. The memory 802 is coupled to the processor 803 for storing program instructions and data necessary for the communication device. The processor 803 is configured to enable the communication device to perform the corresponding functions of the method provided by the first aspect described above, which functions may be implemented by invoking program instructions stored by the memory 802. Specifically, the transceiver 801 may be a wireless transceiver, and may be configured to support a communication device to receive and transmit signaling and data over a wireless air interface. The above transceivers 701, processors 702, and memory 703 may be connected by a bus (bus) structure or other connection medium.

Next, functions of the respective components of the communication apparatus shown in fig. 8 will be described in detail.

In implementing the functionality of the first terminal device, the processor 803 may be configured to generate a reference signal according to a first parameter, wherein the first parameter is used for generating a sequence of the reference signal, and the first parameter may be determined according to a second parameter, which 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 based on the second parameter. Alternatively, the transceiver 801 may further receive the second parameter from a network device, and the processor 803 may further be configured to determine the first parameter according to the second parameter.

The transceiver 801 may also illustratively transmit the first parameter and/or the second parameter to the second terminal device to cause the second terminal device to determine the sequence of reference signals according to the first parameter.

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

In implementations, the information identifying the transmission link may include at least one of: an identity of the first terminal device; or, an identity of the second terminal device; or, a source identification; alternatively, the 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 device is an RNTI configured for the first terminal device; or, the network device is an RNTI configured for the second terminal device; or, the network device is an RNTI configured for the first terminal device and the second terminal device; or, HARQ process number; wherein the transmission link is due to a transmission between the first terminal device and the second terminal device.

The reference signal may include at least one of a DM-RS, a CSI-RS, a PT-RS, or a R L M-RS.

The transmission resource information may include at least one of the following information: information of a first resource, wherein the first resource is a resource for transmitting first data to a second terminal device by the first terminal device; or, information of a second resource, where the second resource is a resource for the first terminal device to send the first control information to the second terminal device; or, information of a third resource, where the third resource is a resource for transmitting second data, and the second data is data received by the first terminal device from a second terminal device; or, information of a fourth resource, where the fourth resource is a resource for transmitting second control information, and the second control information is 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, the number of retransmissions; or, a subcarrier spacing; or, the transmission mode may include unicast, multicast or broadcast; or, indication information of a specific field in first control information, where the first control information is control information sent by the first terminal device to a second terminal device; or, indication information of a specific field in second control information, where the second control information is control information received by the first terminal device from a second terminal device; or receiving indication information of downlink control information DCI for the sidelink from the network equipment.

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

Illustratively, the first resource may comprise the second resource. And/or the third resource may comprise 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；

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 a first parameter according to the sequence hop; and/or the processor 803 may determine a group hop according to the second parameter, and determine the first parameter according to the group hop.

If the first parameter comprises a cyclic shift of the sequence, the processor 803 may determine the cyclic shift of the sequence according to the following formula:

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

n_occ＝q(x)mod K；

If the sequence comprises a random sequence and the first parameter comprises a 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*N₁*N₂+N₃+f(x))mod(2³¹)；

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹)；

c_init＝(2^m*N₁*(N₂+f(x))+N₃)mod(2³¹)；

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

Δ＝f(x)；

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

In implementing the functionality of the first terminal device, the processor 803 may determine a first parameter for generating a sequence of reference signals, the first parameter being determined in dependence of a second parameter, which may comprise information for identifying the transmission link and/or transmission resource information. The transceiver 801 may also detect the reference signal from the received signal based on 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 transmitted by the first terminal device. In addition, the transceiver 801 may further receive the second parameter from a network device and/or a first terminal device, and the reference signal is transmitted by the first terminal device, and thereafter, the processor may determine the first parameter according to the second parameter.

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

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

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

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

u＝f(x)modM；

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 a first parameter according to the sequence hop; and/or the processor may determine a group hop according to the second parameter, and determine the first parameter according to the group hop.

If the first parameter comprises an orthogonal cover code bit of the sequence, the processor 803 may determine an index of the orthogonal cover code of the sequence according to the following formula:

n_occ＝q(x)mod K；

c_init＝(2^m*N₁*N₂+N₃+f(x))mod(2³¹)；

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹)；

c_init＝(2^m*N₁*(N₂+f(x))+N₃)mod(2³¹)；

Δ＝f(x)；

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

When the functions of the first terminal device and/or the second terminal device provided in the embodiment of the present application are implemented by the structure shown in fig. 9, reference may be made to the above description of the steps executed by the transceiver 801 and the processor 803 in the communication apparatus shown in fig. 8 for the steps executed by the transceiver 901 and the processor 902, which are not described again here. Specifically, the transceiver unit 901 may be used to perform the steps performed by the transceiver 801 in the communication apparatus shown in fig. 8, and the processing unit 902 may be used to perform the steps performed by the processor 803 in the communication apparatus shown in fig. 8.

Based on the same concept as the method embodiments, embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, causes the computer to perform the operations performed by the first terminal device and/or the second terminal device in any one of the possible implementations of the method embodiments and the method embodiments.

Based on the same concept as the method embodiments, the present application further provides a computer program product, which when called by a computer, can enable the computer to implement the operations performed by the first terminal device and/or the second terminal device in any one of the possible implementations of the method embodiments and the method embodiments.

Based on the same concept as the method embodiments, the present application further provides a chip or a chip system, where the chip is coupled to a transceiver and is used to implement the operations performed by the first terminal device and/or the second terminal device in any possible implementation manner of the method embodiments and method embodiments. Where "coupled" means that two components are joined to one another, either directly or indirectly, which can be fixed or movable, and which can allow a flowing liquid, electrical, or other type of signal to be communicated between the two components. The chip system may include the chip.

Based on the same concept as the method embodiment, the present application further provides a communication system, which may be used to implement the operations performed by the first terminal device and/or the second terminal device in any one of the possible implementations of the method embodiment and the method embodiment. Illustratively, the communication system has a structure as shown in fig. 1 and/or fig. 2.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, and computer program products according to embodiments. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Claims

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；

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)；

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹)；

c_init＝(2^m*N₁*(N₂+f(x))+N₃)mod(2³¹)；

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)；

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 source identifier and the destination identifier; or

The network equipment is an RNTI configured for the first 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；

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:

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；

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)；

c_init＝(2^m*(N₁+f(x))*N₂+N₃)mod(2³¹)；

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)；

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.