WO2017117811A1

WO2017117811A1 - Signal transmission method and terminal device

Info

Publication number: WO2017117811A1
Application number: PCT/CN2016/070508
Authority: WO
Inventors: 赵振山; 刘德平
Original assignee: 华为技术有限公司
Priority date: 2016-01-08
Filing date: 2016-01-08
Publication date: 2017-07-13

Abstract

Embodiments of the present invention provide a signal transmission method and a terminal device. The method comprises: obtaining first parameter information of a sidelink synchronization signal of a first system and second parameter information of a sidelink synchronization signal of a second system; determining whether a resource of the sidelink synchronization signal of the first system is identical to that of the sidelink synchronization signal of the second system; if not, generating a first signal according to a first pilot structure, wherein each sub-frame of the first signal comprises two demodulation reference signals (DMRSs), one DMRS is spaced apart from a primary sidelink synchronization signal by two orthogonal frequency division multiplexing (OFDM) symbols, and the other DMRS is spaced apart from a secondary sidelink synchronization signal by two OFDM symbols; and transmitting the first signal to a second terminal device in the first system. By reducing the number of symbols existing between the DMRSs, the time interval between the DMRSs is shorten and kept within a channel coherence time range of the first system, thereby effectively reducing the bit error ratio of a receiving end.

Description

Signal transmission method and terminal device

Technical field

The embodiments of the present invention relate to data transmission technologies, and in particular, to a signal transmission method and a terminal device.

Background technique

At present, Device-to-Device (D2D) is a technology for end-to-end direct communication. Communication between terminal devices no longer requires the relay of the base station to directly communicate. The base station can perform resource configuration. Scheduling and coordination, etc., to facilitate direct communication between terminal devices.

In recent years, automobile networks have attracted more and more people's attention. Through the communication between vehicles and vehicles or the communication between vehicles and roadside units, the safety and reliability of road traffic are improved, and the traffic efficiency is improved. In the Internet of Vehicles, in order to ensure safe driving of vehicles, periodic interaction status information is required between vehicles and vehicles. Vehicles usually broadcast their own status information to other vehicles around them. This communication method and long-term evolution (Long) The D2D system of Term Evolution, LTE) is similar, so the vehicle networking technology based on D2D system has been established in the 3rd Generation Partnership Project (3GPP). 1 is a subframe structure of a synchronization signal transmitted by a Physical Sidelink Broadcast Channel (PSBCH) in an LTE D2D system. As shown in FIG. 1, each subframe includes 14 orthogonal frequency division multiplexing (Orthogonal Frequency). Division Multiplexing (OFDM) symbol, the second and third symbols from left to right represent the Primary Sidelink Synchronization Signal (PSSS), and the fourth and eleventh symbols represent the demodulation reference signal (DeModulation Reference) Signal, DMRS), the twelfth and thirteenth symbols indicate the Side Side Synchronization Signal (SSSS), the fourteenth symbol indicates the gap (GAP), and is not used to transmit data. Other symbols are used. Transmit PSBCH data.

However, compared with ordinary D2D, the terminal network is moving at a high speed, and the highest relative moving speed between each two vehicles can reach 280 km/h, and the interval between two pilots in the PSBCH pilot structure of the D2D system. Far exceeds the channel coherence time required by the Internet of Vehicles system, so that channel estimation and realism on other symbols obtained by interpolation using channel estimates of two pilot symbols The channels vary greatly, resulting in an increase in the bit error rate at the receiving end and a failure in data transmission.

Summary of the invention

The embodiment of the invention provides a signal transmission method and a terminal device, so as to solve the time interval of two pilot signals in the PSBCH pilot structure of the D2D system, which far exceeds the channel coherence time required by the vehicle network system, so that two guides are utilized. The channel estimation on the other symbols obtained by interpolating the channel estimation of the frequency symbol is greatly different from the real channel, thereby causing an increase in the bit error rate at the receiving end and a problem of data transmission failure.

A first aspect of the present invention provides a signal transmission method, including:

Acquiring first parameter information of the side line synchronization signal of the first system and second parameter information of the side line synchronization signal of the second system;

Determining, according to the first parameter information and the second parameter information, whether resources of a side line synchronization signal of the first system and resources of a side line synchronization signal of the second system are the same;

If not, generating a first signal according to the first pilot structure; the first signal includes a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system; wherein the side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two positive Interleaving the OFDM symbol by frequency division, and another DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols;

Transmitting the first signal to a second terminal device in the first system.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the method further includes:

If the same, generating a second signal according to the second pilot structure; the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system;

Transmitting the second signal to the second terminal device of the first system;

The structure of each subframe of the second signal adopting the second pilot structure is any one of the following four structures:

The first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , fifth, seventh, eighth and tenth symbols represent transmitted data signals, twelfth and Thirteen symbols represent the side line sync signal, and the fourteenth symbol acts as a gap;

The second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

The third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth The symbol indicates the transmitted data signal, the fifth, eighth and eleventh symbols represent the transmitted DMRS, the twelfth and thirteenth symbols represent the side line sync signal, and the fourteenth symbol acts as the gap;

The fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the first pilot structure includes a pilot scheme of a normal CP or a guide of an extended CP Frequency scheme

Wherein, in the pilot scheme of the normal CP, each subframe includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization signals, first, fourth, fifth, and seventh. , eighth, tenth and eleventh symbols represent transmitted data signals, sixth and ninth symbols represent DMRS, and twelfth and thirteenth symbols represent side-slot sync signals, Fourteen symbols as gaps;

Each of the pilot schemes of the extended CP includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, fourth, sixth, eighth, and The ninth symbol represents the transmitted data signal, the fifth and seventh symbols represent the DMRS, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.

In conjunction with any one of the preceding implementations, in a third possible implementation manner of the first aspect, the acquiring the first parameter information of the side line synchronization signal of the first system and the side line synchronization signal of the second system Two parameter information, including:

Receiving, by the base station, first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;

or,

Acquiring first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.

In conjunction with any of the foregoing real-time modes, in a fourth possible implementation of the first aspect, the first system is a vehicle networking communication system; and the second system is a device-to-device D2D communication system.

A second aspect of the present invention provides a data signal transmission method, including:

If not, receiving the first signal according to the first pilot structure; the first signal is a side line synchronization signal that is generated by the first terminal device in the first system according to the first pilot structure and includes the first system Demodulating a reference signal DMRS and a transmission signal of the data signal; wherein the side line synchronization signal comprises a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure Two DMRSs are included in one subframe, and one of the DMRSs is separated from the side-line primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is separated from the side-line secondary synchronization signal by two OFDM symbols.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes:

If the same, receiving the second signal according to the second pilot structure; the second signal is a side of the first system that is generated by the first terminal device in the first system according to the second pilot structure, including the first system a transmission signal of a line sync signal, a DMRS, and a data signal;

The first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , the fifth, seventh, eighth and tenth symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

A third aspect of the present invention provides a terminal device, including:

An acquiring module, configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;

a determining module, configured to determine, according to the first parameter information and the second parameter information, whether resources of a side line synchronization signal of the first system and resources of a side line synchronization signal of the second system are the same;

a processing module, configured to generate, according to the first pilot structure, a first signal, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system; The side line synchronization signal, the demodulation reference signal DMRS, and the data signal of the first system are included; wherein the side line synchronization signal comprises a side line main synchronization signal and a side line secondary synchronization signal; and the first pilot structure is adopted The first signal includes two DMRSs in each subframe, and one of the DMRSs is separated from the side-line primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is spaced apart from the side-line secondary synchronization signal by two. OFDM symbol;

And a sending module, configured to send the first signal to a second terminal device in the first system.

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the processing module is further configured to: if a resource of a side line synchronization signal of the first system and a side line synchronization signal of the second system Generating the second signal according to the second pilot structure; the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system;

The sending module is further configured to send the second signal to the second terminal device of the first system;

With reference to any of the foregoing implementation manners, in a second implementation manner of the foregoing aspect, the first pilot structure includes a pilot scheme of a normal CP or a pilot scheme of an extended CP;

In combination with any of the foregoing implementation manners, in a third implementation manner of the third aspect, the acquiring module The block includes:

a receiving unit, configured to receive first parameter information of a side line synchronization signal of the first system and a second parameter information of a side line synchronization signal of the second system that are broadcast by the base station;

or,

a processing unit, configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.

A fourth aspect of the present invention provides a terminal device, including:

a receiving module, configured to receive, according to the first pilot structure, a first signal, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system; a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line synchronization The signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two The OFDM symbols are orthogonally frequency division multiplexed, and the other DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving module is further configured to: if a resource of a side line synchronization signal of the first system and a side line synchronization signal of the second system Receiving a second signal according to the second pilot structure; the second signal is generated by the first terminal device in the first system according to the second pilot structure, including the first system a side line sync signal, a DMRS, and a data signal transmission signal;

A fifth aspect of the present invention provides a terminal device, including: a processor for controlling execution of executable instructions, a memory for storing executable instructions of the processor, and a transmitter;

The processor is used to:

The transmitter is configured to send the first signal to a second terminal device in the first system.

A sixth aspect of the present invention provides a terminal device, including: a processor for controlling execution of executable instructions, a memory for storing processor-executable instructions, and a receiver;

The processor is used to:

The receiver is configured to receive a first signal according to a first pilot structure if a resource of a side line synchronization signal of the first system and a resource of a side line synchronization signal of the second system are different; the first signal a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line synchronization The signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two The OFDM symbols are orthogonally frequency division multiplexed, and the other DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.

The method for transmitting a signal and the terminal device provided by the embodiment of the present invention determine whether the resources of the side line synchronization signals of the first system and the second system are the same through the first parameter information of the first system and the second parameter information of the second system. If the same, the time domain density of the demodulation reference signal is increased, that is, the number of symbols of the interval between the demodulation reference signals is reduced, and when the synchronization resources of the first system and the second system side are different, the pilot overhead is not maintained. Changing the position of the demodulation reference signal can overcome the influence of high Doppler spread in the first system, shorten the time interval between demodulation reference signals, and maintain the channel coherence time range of the first system, effectively reducing reception. The bit error rate of the terminal.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a subframe structure of a synchronization signal transmitted by a Physical Sidelink Broadcast Channel (PSBCH) in an LTE D2D system;

2 is a flowchart of Embodiment 1 of a method for transmitting a signal according to the present invention;

FIG. 3a is a schematic diagram of a frame structure of a normal cyclic prefix (Cyclic Prefix, CP) in a first pilot structure. Figure

FIG. 3b is a schematic diagram of a frame structure of an extended CP in a first pilot structure; FIG.

4 is a flowchart of Embodiment 2 of a method for transmitting a signal according to the present invention;

5a is a schematic diagram of a first frame structure of a normal CP in a second pilot structure;

FIG. 5b is a schematic diagram of a second frame structure of a normal CP in a second pilot structure; FIG.

5c is a schematic diagram of a third frame structure of a normal CP in a second pilot structure;

FIG. 5d is a schematic diagram of a frame structure of an extended CP in a second pilot structure;

6 is a flowchart of Embodiment 3 of a method for transmitting a signal according to the present invention;

7 is a schematic diagram of time division multiplexing of a D2D system and an LTE-V system;

8 is a schematic diagram of shared resources of a D2D system and an LTE-V system;

FIG. 9 is a schematic structural diagram of Embodiment 1 of a terminal device according to the present invention;

FIG. 10 is a schematic structural diagram of Embodiment 2 of a terminal device according to the present invention;

FIG. 11 is a schematic structural diagram of Embodiment 3 of a terminal device according to the present invention;

12 is a schematic structural diagram of an example of a terminal device provided by the present invention;

FIG. 13 is a schematic structural diagram of still another example of a terminal device according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The signal transmission method provided by the present invention is mainly applied when there are transmission mechanisms of two communication systems, for example, an LTE D2D system and a vehicle networking system (also referred to as an LTE-V system) established based on D2D communication, preferably The application is in the Internet of Vehicles (with or without base station participation). Currently, there is no corresponding scheme for the pilot design on the LTE-V PSBCH. If the LTE D2D system PSBCH channel pilot is used, there is a certain problem, so the present invention Several new pilot schemes are proposed, which can avoid the Doppler spread caused by high carrier frequency and high moving speed, and can also reduce the transmission error rate on the PSBCH. The specific implementation scheme is as follows:

2 is a flowchart of Embodiment 1 of a method for transmitting a signal provided by the present invention, as shown in FIG. 2, The execution entity of the embodiment is a first terminal device of the sending end, for example, a smart terminal device such as a mobile phone or a tablet computer, or a vehicle, and the first terminal device can communicate with the base station or can directly communicate with other terminal devices. The transmission method of the signal specifically includes:

S101: Acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.

In this embodiment, at least the following two ways of obtaining parameter information are included:

In a first mode, the first parameter information of the side line synchronization signal of the first system and the second parameter information of the side line synchronization signal of the second system that are broadcast by the base station are received.

The base station has the function of radio resource management, and can communicate with the first terminal device, or can be used as a central controller to assist communication between the terminal devices. The base station may perform configuration on the transmission resource of the controlled terminal device, and broadcast the configured parameter information, where the first parameter information includes frequency domain information and time domain information of the side line synchronization signal transmission of the first system; The parameter information includes time domain information and frequency domain information of the side line sync signal data transmission of the second system. This refers to some parameters of the side-line sync signal.

In a second manner, the first parameter information of the side line synchronization signal of the first system and the second parameter information of the side line synchronization signal of the second system are obtained. The user can manually configure the required parameter information in the terminal device according to requirements.

Optionally, the resource pool information can also be obtained according to the foregoing two methods.

S102: Determine, according to the first parameter information and the second parameter information, whether resources of the side synchronization signal of the first system and resources of the side synchronization signal of the second system are the same.

In this embodiment, according to the first parameter information and the second parameter information acquired in the foregoing steps, whether the frequency domain information and the time domain information of the side line synchronization signals of the first system and the second system are the same.

For example, comparing the carrier frequency information and the subframe information of the first system and the second system for transmitting the side line synchronization signal, determining that the side channel synchronization signal resources of the first system and the second system are the same when the carrier frequency information and the subframe information are the same. Otherwise, the resources are judged differently.

S103: If different, generate a first signal according to the first pilot structure; the first signal includes a side line synchronization signal, a DMRS, and a data signal of the first system.

The side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs The side row primary synchronization signal is spaced by two orthogonal frequency division multiplexed OFDM symbols, and the other The DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.

Further, in the first pilot structure, one of the DMRSs is located after the side line main synchronization signal, and is separated from the last side line main synchronization signal by two orthogonal frequency division multiplexing OFDM symbols; the other is located in the side line auxiliary Before the synchronization signal, and separated from the first side-line secondary synchronization signal by two OFDM symbols.

S104: Send the first signal to a second terminal device in the first system.

With reference to the above steps, the D2D system (equivalent to the second system) and the LTE-V system (equivalent to the first system) are taken as an example to describe the solution. The first terminal device is configured by the base station broadcast or by pre-configuration. Parameter information of the sideline synchronization signal (SLSS) of the D2D system and LTE-V.

The first terminal device determines whether the side line synchronization signal resource of the D2D system is synchronized with the side line of the LTE-V system according to the received side line synchronization signal parameter information broadcasted by the base station or according to the preconfigured side line synchronization signal parameter information. The signal resources are the same.

If the side-synchronization signal resource of the D2D system and the synchronization signal resource of the LTE-V system are different, that is, the synchronization signals of the D2D system and the LTE-V system have different transmission resources, the pilot structure in the following FIG. 3a or 3b may be adopted. The synchronization signal and the transmission of the PSBCH are performed. FIG. 3a is a schematic diagram of a frame structure of a normal CP in a first pilot structure; FIG. 3b is a schematic diagram of a frame structure of an extended CP in a first pilot structure. That is, the first pilot structure includes a pilot scheme of a normal CP or a pilot scheme of an extended CP.

As shown in FIG. 3a, in a pilot scheme of a normal CP, each subframe includes fourteen OFDM symbols, and the second and third symbols represent a side-line primary synchronization signal (PSSS in the figure), first, first The four, fifth, seventh, eighth, tenth, and eleventh symbols represent transmitted data signals, and the sixth and ninth symbols represent DMRS, twelfth and thirteenth The symbol indicates the side line sync signal (SSSS in the figure), and the fourteenth symbol is used as the gap;

As shown in FIG. 3b, each subframe in the extended CP pilot scheme includes twelve OFDM symbols, and the first and second symbols represent side-line primary synchronization signals (PSSS in the figure), third and fourth. The sixth, eighth, and ninth symbols represent the transmitted data signals, the fifth and seventh symbols represent the DMRS, and the tenth and eleventh symbols represent the side-segment sync signals (in the figure) SSSS), the twelfth symbol as a gap.

The figure shows different signals to be sent on different time-frequency resources. When the first terminal device determines that the synchronization resources used by the D2D system and the LTE-V system are different, the LTE-V system may be used for the LTE-V system. The frame structure shown in FIG. 3a or FIG. 3b is used to generate a transmission signal, that is, the first signal, and then the signal is sent to the second terminal device. For the terminal device at the receiving end, the implementation manner is similar to that of the terminal device at the transmitting end. The parameter information of each system is obtained in advance, and the parameter information is used to determine whether the first system and the second system use the same synchronization resource. If not, the first signal is received according to the first pilot structure.

The method for transmitting a signal provided in this embodiment provides a manner for determining whether the synchronization signal resources are the same according to the parameter information, and provides a new pilot scheme, which reduces the time domain density of the demodulation reference signal, that is, reduces the demodulation. The number of symbols in the interval between reference signals, when the resources are different, the pilot overhead is kept unchanged, and the position of the demodulation reference signal is changed, which can overcome the influence of high Doppler spread in the first system and shorten the time of demodulating the reference signal. The interval is maintained within the channel coherence time range of the first system, effectively reducing the bit error rate at the receiving end.

FIG. 4 is a flowchart of Embodiment 2 of a method for transmitting a signal according to the present invention. As shown in FIG. 4, the execution subject of the embodiment is a first terminal device at a transmitting end, and the specific implementation steps of the signal transmission method include:

S201: Acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.

S202: Determine, according to the first parameter information and the second parameter information, whether resources of the side synchronization signal of the first system and resources of the side synchronization signal of the second system are the same.

The specific implementation of the foregoing two steps is exactly the same as that of the first embodiment. The technical solutions of the present solution and the first embodiment are two branches in parallel. When it is determined that the first system and the second system use different synchronization signal resources, the implementation is performed. In the foregoing steps S103 and S104, when it is determined that the first system and the second system use the same synchronization signal resource, the steps of S203 and S204 are performed.

S203: If they are the same, generate a second signal according to the second pilot structure; the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system.

In this embodiment, on the basis of the first embodiment, the D2D system (equivalent to the second system) and the LTE-V system (equivalent to the first system) are taken as an example, when the first terminal device determines the LTE-V. When the resources of the synchronization signal of the system and the D2D system are the same, the second pilot structure is used to generate the second signal. Here, the resources of the synchronization signal are the same, that the two systems use the proprietary carrier of the LTE-V system, for example, the dedicated carrier configured as the LTE-V system at a frequency of 5.9 GHz, 6 GHz, etc., and the two systems transmit the synchronization signal. The time domain resource and the frequency domain resource are the same.

The structure of each subframe of the generated second signal using the second pilot structure is any one of the following four structures:

FIG. 5a is a schematic diagram of a first frame structure of a normal CP in a second pilot structure. As shown in FIG. 5a, the first seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent a side row master. Synchronization signal (ie PSSS in the figure), the fourth, sixth, ninth and eleventh symbols represent the DMRS, the first, fifth, seventh, eighth and tenth symbols Representing the transmitted data signal, the twelfth and thirteenth symbols represent the side line sync signal (ie SSSS in the figure) and the fourteenth symbol acts as a gap.

5b is a schematic diagram of a second frame structure of a normal CP in a second pilot structure. As shown in FIG. 5b, the second seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization. The signal (ie PSSS in the figure), the fourth, seventh and tenth symbols represent the DMRS, the first, fifth, sixth, eighth, ninth and eleventh symbolic representations The transmitted data signal, the twelfth and thirteenth symbols represent the side-segment sync signal (ie SSSS in the figure), and the fourteenth symbol acts as a gap.

5c is a schematic diagram of a third frame structure of a normal CP in a second pilot structure. As shown in FIG. 5c, the third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization. The signal (ie PSSS in the figure), the first, fourth, sixth, seventh, ninth and tenth symbols represent the transmitted data signal, fifth, eighth and eleventh The symbols represent the transmitted DMRS, the twelfth and thirteenth symbols represent the side line sync signal (ie SSSS in the figure), and the fourteenth symbol acts as a gap.

FIG. 5d is a schematic diagram of a frame structure of an extended CP in a second pilot structure. As shown in FIG. 5d, the frame structure is a fourth frame structure in a second pilot structure, and the fourth seed frame structure includes twelve OFDM symbol, the first and second symbols represent the side-line primary synchronization signal (ie PSSS in the figure), the third, sixth and ninth symbols represent the DMRS, the fourth, fifth, seventh The eighth and eighth symbols represent the transmitted data signals, the tenth and eleventh symbols represent the side-wave sync signal (ie SSSS in the figure), and the twelfth symbol acts as a gap.

S204: Send the second signal to the second terminal device of the first system.

That is, after determining that the first system and the second system use the same synchronization signal resource, the first terminal device may generate a transmission signal, that is, the foregoing second signal, according to any one of the second pilot structures. Send it. That is, using any of the frame structures of Figures 5a-5d for synchronizing signals and PSBCH For the terminal device of the receiving end, the implementation manner is similar to that of the transmitting end, and the parameter information of the side line synchronization signal of the first system and the second system is obtained in advance, and whether the synchronization signals of the first system and the second system use the same If the resources are different, the first pilot structure is used for receiving, and if they are the same, the second pilot structure is used for receiving.

Specifically, the first terminal device of the sending end specifically selects which one of the foregoing frame structures may be configured in advance or is specified by a protocol, and may also be determined by a message broadcasted by the base station, and the application does not do this. limit.

The signal transmission method provided by this embodiment designs a pilot scheme of a new PSBCH channel by using parameter information of resources of different systems, which can overcome the influence of Doppler spread in a high-speed system such as an LTE-V system, and reduce the system. The bit error rate of signal transmission can also reduce the pilot overhead.

FIG. 6 is a flowchart of Embodiment 3 of a method for transmitting a signal according to the present invention. As shown in FIG. 6, the execution entity of this embodiment is a second terminal device at a receiving end, and the second terminal device may be a mobile phone or a tablet computer. , vehicles and other equipment, the specific implementation steps of the signal transmission method include:

S301: Acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.

S302: Determine, according to the first parameter information and the second parameter information, whether resources of the side line synchronization signal of the first system and resources of the side line synchronization signal of the second system are the same.

S303: If not, receiving the first signal according to the first pilot structure; the first signal is a side line that is generated by the first terminal device in the first system according to the first pilot structure, including the first system The transmission signal of the synchronization signal, DMRS and data signal.

In this embodiment, the side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the subframes adopting the first pilot structure includes two DMRSs, and One of the DMRSs is separated from the side-line primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is spaced apart from the side-line secondary synchronization signal by two OFDM symbols.

S304: if yes, receiving a second signal according to the second pilot structure; the second signal is generated by the first terminal device in the first system according to the second pilot structure, including the first system The side line sync signal, the DMRS and the data signal transmission signal.

In this step, the structure of each subframe of the second signal adopting the second pilot structure is any one of the following four structures:

The first seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side lines The primary synchronization signal, the fourth, sixth, ninth and eleventh symbols represent the DMRS, and the first, fifth, seventh, eighth and tenth symbols represent the transmitted data signals, The twelfth and thirteenth symbols represent side line sync signals, and the fourteenth symbol acts as a gap;

In this embodiment, the terminal device for the receiving end is similar to the terminal device at the transmitting end, and also acquires parameter information of the first system and the second system in advance, and determines resources used by the synchronization signals of the first system and the second system according to the parameter information. If the information is different, the first pilot structure is used to receive the signal. If the information is the same, the second pilot structure is used for receiving the signal. The specific pilot scheme is described in the foregoing Embodiment 1 and Embodiment 2. Similar to the terminal device on the transmitting end, the frame structure of the above-mentioned ones may be pre-configured or specified by the protocol, or may be determined by the indication of the notification message sent by the base station, which is not limited in this application.

In combination with the foregoing descriptions of the first to third embodiments, a specific implementation is provided below:

For example, on the basis of the working carrier of the existing LTE system, a dedicated carrier is allocated for the LTE-V system to transmit the vehicle network, for example, the LTE system adopts a carrier of 2.6 GHz, and the LTE-V system adopts a carrier of 5.9 GHz on the carrier of 5.9 GHz. There is only a car network service, and there are both LTE normal uplink and downlink services and D2D systems on the 2.6G carrier. At this time, the D2D system and the LTE-V system work on different carriers. Therefore, the pilot of the PSBCH subframe of the LTE-V system can adopt the subframe structure in the foregoing first pilot structure.

In addition, FIG. 7 is a schematic diagram of time division multiplexing of a D2D system and an LTE-V system, if the base station is configured The D2D system and the LTE-V system work on one carrier, and the transmission resources of the two are time-division, as shown in FIG. 7. At this time, the PSBCH subframe of the LTE-V system can adopt the pilot structure of the first pilot structure. .

8 is a schematic diagram of shared resources of a D2D system and an LTE-V system. If the base station configures the D2D system and the LTE-V system to work on one carrier, and the synchronization signal transmission resources of the two overlap in time, as shown in FIG. At this time, the PSBCH subframe of the LTE-V system adopts the pilot structure shown in FIG. 5a to FIG. 5d, and the specific pilot structure may be configured by the base station, and the protocol specifies or is pre-configured.

In FIGS. 7 and 8, the horizontal axis t represents time, the vertical axis f represents frequency, D represents a D2D system, and V represents an LTE-V system.

The signal transmission method provided by the present invention designs a new PSBCH channel pilot structure. Compared to the Rel-12PSBCH pilot structure, this scheme increases the pilot density to overcome the effects of Doppler spread when the D2D and LTE-V synchronization resources are the same. When the D2D and LTE-V synchronization resources are different, the pilot overhead is kept unchanged, the pilot position is changed, the time interval between the pilot signals is shortened, the bit error rate at the receiving end is reduced, and the data transmission efficiency is improved.

FIG. 9 is a schematic structural diagram of Embodiment 1 of a terminal device according to the present invention. As shown in FIG. 9, the terminal device 10 includes:

The obtaining module 11 is configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;

The determining module 12 is configured to determine, according to the first parameter information and the second parameter information, whether resources of the side synchronization signal of the first system and resources of the side synchronization signal of the second system are the same;

The processing module 13 is configured to generate a first signal according to the first pilot structure, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system; The signal includes a side line sync signal, a demodulation reference signal DMRS, and a data signal of the first system; wherein the side line sync signal includes a side line main sync signal and a side line sub sync signal; using the first pilot The first signal of the structure includes two DMRSs in each subframe, and one of the DMRSs is separated from the side row primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is spaced apart from the side line secondary synchronization signal by two. OFDM symbols;

a sending module 14 configured to send the first signal to a second terminal in the first system Ready.

Optionally, the processing module 13 is further configured to: if the resources of the side line synchronization signal of the first system and the resources of the side line synchronization signal of the second system are the same, generate a second according to the second pilot structure. a signal; the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system;

The sending module 14 is further configured to send the second signal to the second terminal device of the first system;

Specifically, the first pilot structure includes a pilot scheme of a normal CP or a pilot scheme of an extended CP;

Wherein, in the pilot scheme of the normal CP, each subframe includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization signals, first, fourth, fifth, and seventh. , eighth, tenth and eleventh symbols represent transmitted data signals, sixth and ninth symbols represent DMRS, and twelfth and thirteenth symbols represent side-slot sync signals, Fourteen symbols As a gap;

FIG. 10 is a schematic structural diagram of Embodiment 2 of a terminal device according to the present invention. As shown in FIG. 10, the acquiring module 11 includes:

The receiving unit 111 is configured to receive first parameter information of a side line synchronization signal of the first system and a second parameter information of a side line synchronization signal of the second system that are broadcast by the base station;

Alternatively, the processing unit 112 is configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.

The terminal device provided in this embodiment is used to perform the technical solution of the method embodiment shown in FIG. 1 to FIG. 5d, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 11 is a schematic structural diagram of Embodiment 3 of a terminal device according to the present invention. As shown in FIG. 11, the terminal device 20 includes:

The obtaining module 21 is configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;

The determining module 22 is configured to determine, according to the first parameter information and the second parameter information, whether resources of the side synchronization signal of the first system and resources of the side synchronization signal of the second system are the same;

The receiving module 23 is configured to receive, according to the first pilot structure, a first signal, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system; The signal is a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line The synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal. Two orthogonal frequency division multiplexed OFDM symbols, and the other DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.

Optionally, the receiving module 23 is further configured to: if the resource of the side line synchronization signal of the first system and the resource of the side line synchronization signal of the second system are the same, receive the second according to the second pilot structure. a signal that is generated by the first terminal device in the first system according to the second pilot structure, including a side line synchronization signal, a DMRS, and a data signal of the first system;

The terminal device provided in this embodiment is used to perform the technical solution of the method embodiment shown in FIG. 6. The implementation principle and technical effects are similar, and details are not described herein again.

The modules described as separate components may or may not be physically separated. The components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of hardware plus software function modules.

FIG. 12 is a schematic structural diagram of an example of a terminal device according to the present invention. As shown in FIG. 12, the terminal device may be specifically implemented as: a processor for controlling execution of executable instructions, and a processor for storing processor executable instructions. Memory and transmitter;

The processor is used to:

FIG. 13 is a schematic structural diagram of still another example of a terminal device according to the present invention. As shown in FIG. 13, the terminal device may be specifically implemented as: a processor for controlling execution of executable instructions, and a processor executable instruction. Memory and receiver;

The processor is used to:

The receiver is configured to receive a first signal according to a first pilot structure if a resource of a side line synchronization signal of the first system and a resource of a side line synchronization signal of the second system are different; the first signal a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line synchronization The signal includes a side row primary synchronization signal and a side line secondary synchronization signal; each of the subframes adopting the first pilot structure includes two DMRSs, and one of the DMRSs The side row primary synchronization signal is spaced by two orthogonal frequency division multiplexed OFDM symbols, and the other DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.

In the embodiment of the foregoing terminal device, it should be understood that the processor may be a central processing unit (English: Central Processing Unit, CPU for short), or may be other general-purpose processors, digital signal processors (English: Digital Signal Processor) , referred to as: DSP), ASIC (English: Application Specific Integrated Circuit, referred to as: ASIC). The general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the foregoing memory may be a read-only memory (English: read-only memory, abbreviation: ROM), a random access memory (English) :random access memory (abbreviation: RAM), flash memory, hard disk or solid state disk. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A method for transmitting a signal, comprising:

Acquiring first parameter information of the side line synchronization signal of the first system and second parameter information of the side line synchronization signal of the second system;

Determining, according to the first parameter information and the second parameter information, whether resources of a side line synchronization signal of the first system and resources of a side line synchronization signal of the second system are the same;

If not, generating a first signal according to the first pilot structure; the first signal includes a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system; wherein the side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two positive Interleaving the OFDM symbol by frequency division, and another DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols;

Transmitting the first signal to a second terminal device in the first system.
The method of claim 1 further comprising:

If the same, generating a second signal according to the second pilot structure; the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system;

Transmitting the second signal to the second terminal device of the first system;

The structure of each subframe of the second signal adopting the second pilot structure is any one of the following four structures:

The first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , the fifth, seventh, eighth and tenth symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

The second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

The third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth The symbol indicates the transmitted data signal, and the fifth, eighth and eleventh symbols indicate the transmitted DMRS, tenth Two and thirteenth symbols represent side line sync signals, and the fourteenth symbol acts as a gap;

The fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
The method according to claim 1 or 2, wherein the first pilot structure comprises a pilot scheme of a normal cyclic prefix CP or a pilot scheme of an extended CP;

Wherein, in the pilot scheme of the normal CP, each subframe includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization signals, first, fourth, fifth, and seventh. , eighth, tenth and eleventh symbols represent transmitted data signals, sixth and ninth symbols represent DMRS, and twelfth and thirteenth symbols represent side-slot sync signals, Fourteen symbols as gaps;

Each of the pilot schemes of the extended CP includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, fourth, sixth, eighth, and The ninth symbol represents the transmitted data signal, the fifth and seventh symbols represent the DMRS, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
The method according to any one of claims 1 to 3, wherein the acquiring first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system, including :

Receiving, by the base station, first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;

or,

Acquiring first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.
The method according to any one of claims 1 to 4, wherein the first system is a car-network communication system; and the second system is a device-to-device D2D communication system.
A method for transmitting a data signal, comprising:

Acquiring first parameter information of the side line synchronization signal of the first system and second parameter information of the side line synchronization signal of the second system;

Determining a side line of the first system according to the first parameter information and the second parameter information Whether the resource of the synchronization signal and the resource of the side synchronization signal of the second system are the same;

If not, receiving the first signal according to the first pilot structure; the first signal is a side line synchronization signal that is generated by the first terminal device in the first system according to the first pilot structure and includes the first system Demodulating a reference signal DMRS and a transmission signal of the data signal; wherein the side line synchronization signal comprises a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure Two DMRSs are included in one subframe, and one of the DMRSs is separated from the side-line primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is separated from the side-line secondary synchronization signal by two OFDM symbols.
The method of claim 6 wherein the method further comprises:

If the same, receiving the second signal according to the second pilot structure; the second signal is a side of the first system that is generated by the first terminal device in the first system according to the second pilot structure, including the first system a transmission signal of a line sync signal, a DMRS, and a data signal;

The structure of each subframe of the second signal adopting the second pilot structure is any one of the following four structures:

The first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , the fifth, seventh, eighth and tenth symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

The second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

The third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth The symbol indicates the transmitted data signal, the fifth, eighth and eleventh symbols represent the transmitted DMRS, the twelfth and thirteenth symbols represent the side line sync signal, and the fourteenth symbol acts as the gap;

The fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
A terminal device, comprising:

An acquiring module, configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;

a determining module, configured to determine, according to the first parameter information and the second parameter information, whether resources of a side line synchronization signal of the first system and resources of a side line synchronization signal of the second system are the same;

a processing module, configured to generate, according to the first pilot structure, a first signal, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system; The side line synchronization signal, the demodulation reference signal DMRS, and the data signal of the first system are included; wherein the side line synchronization signal comprises a side line main synchronization signal and a side line secondary synchronization signal; and the first pilot structure is adopted The first signal includes two DMRSs in each subframe, and one of the DMRSs is separated from the side-line primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is spaced apart from the side-line secondary synchronization signal by two. OFDM symbol;

And a sending module, configured to send the first signal to a second terminal device in the first system.
The terminal device according to claim 8, wherein the processing module is further configured to: if a resource of a side line synchronization signal of the first system and a resource of a side line synchronization signal of the second system are the same, Generating a second signal according to the second pilot structure; the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system;

The sending module is further configured to send the second signal to the second terminal device of the first system;

The structure of each subframe of the second signal adopting the second pilot structure is any one of the following four structures:

The first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , the fifth, seventh, eighth and tenth symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

The second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

The third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth The symbol indicates the transmitted data signal, the fifth, eighth and eleventh symbols represent the transmitted DMRS, the twelfth and thirteenth symbols represent the side line sync signal, and the fourteenth symbol acts as the gap;

The fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
The terminal device according to claim 8 or 9, wherein the first pilot structure comprises a pilot scheme of a normal CP or a pilot scheme of an extended CP;

Wherein, in the pilot scheme of the normal CP, each subframe includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization signals, first, fourth, fifth, and seventh. , eighth, tenth and eleventh symbols represent transmitted data signals, sixth and ninth symbols represent DMRS, and twelfth and thirteenth symbols represent side-slot sync signals, Fourteen symbols as gaps;

Each of the pilot schemes of the extended CP includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, fourth, sixth, eighth, and The ninth symbol represents the transmitted data signal, the fifth and seventh symbols represent the DMRS, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
The terminal device according to any one of claims 8 to 10, wherein the obtaining module comprises:

a receiving unit, configured to receive first parameter information of a side line synchronization signal of the first system and a second parameter information of a side line synchronization signal of the second system that are broadcast by the base station;

or,

a processing unit, configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.
A terminal device, comprising:

An acquiring module, configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;

a determining module, configured to determine, according to the first parameter information and the second parameter information, Whether the resource of the side line synchronization signal of the first system and the resource of the side line synchronization signal of the second system are the same;

a receiving module, configured to receive, according to the first pilot structure, a first signal, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system; a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line synchronization The signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two The OFDM symbols are orthogonally frequency division multiplexed, and the other DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.
The terminal device according to claim 12, wherein the receiving module is further configured to: if a resource of a side line synchronization signal of the first system and a resource of a side line synchronization signal of the second system are the same, Receiving a second signal according to the second pilot structure; the second signal is a side line synchronization signal that is generated by the first terminal device in the first system according to the second pilot structure, including the first system, Transmission signals of DMRS and data signals;

The structure of each subframe of the second signal adopting the second pilot structure is any one of the following four structures:

The first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , the fifth, seventh, eighth and tenth symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

The second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;

The third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth The symbol indicates the transmitted data signal, the fifth, eighth and eleventh symbols represent the transmitted DMRS, the twelfth and thirteenth symbols represent the side line sync signal, and the fourteenth symbol acts as the gap;

The fourth seed frame structure includes twelve OFDM symbols, and the first and second symbols represent side lines Primary sync signal, third, sixth and ninth symbols represent DMRS, fourth, fifth, seventh and eighth symbols represent transmitted data signals, tenth and eleventh symbols Indicates the side line sync signal, and the twelfth symbol acts as a gap.
A terminal device, comprising: a processor for controlling execution of executable instructions, a memory for storing processor-executable instructions, and a transmitter;

The processor is used to:

Acquiring first parameter information of the side line synchronization signal of the first system and second parameter information of the side line synchronization signal of the second system;

Determining, according to the first parameter information and the second parameter information, whether resources of a side line synchronization signal of the first system and resources of a side line synchronization signal of the second system are the same;

If not, generating a first signal according to the first pilot structure; the first signal includes a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system; wherein the side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two positive Interleaving the OFDM symbol by frequency division, and another DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols;

The transmitter is configured to send the first signal to a second terminal device in the first system.
A terminal device, comprising: a processor for controlling execution of executable instructions, a memory for storing processor-executable instructions, and a receiver;

The processor is used to:

Acquiring first parameter information of the side line synchronization signal of the first system and second parameter information of the side line synchronization signal of the second system;

Determining, according to the first parameter information and the second parameter information, whether resources of a side line synchronization signal of the first system and resources of a side line synchronization signal of the second system are the same;

The receiver is configured to receive a first signal according to a first pilot structure if a resource of a side line synchronization signal of the first system and a resource of a side line synchronization signal of the second system are different; the first signal a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line synchronization The signal includes a side line primary synchronization signal and a side line secondary synchronization signal; using the first guide The first signal of the frequency structure includes two DMRSs in each subframe, and one of the DMRSs is separated from the side-line primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is spaced apart from the side-by-side secondary synchronization signal. Two OFDM symbols.