WO2019183961A1

WO2019183961A1 - Communication method and terminal device

Info

Publication number: WO2019183961A1
Application number: PCT/CN2018/081450
Authority: WO
Inventors: 黄斌
Original assignee: 华为技术有限公司
Priority date: 2018-03-30
Filing date: 2018-03-30
Publication date: 2019-10-03
Also published as: CN111903146B; CN111903146A

Abstract

A communication method and a terminal device, for solving the problem of increased power consumption caused by the fact that a Remote terminal needs to receive and decode a mass of unnecessary data during the communication of the Remote terminal and a target Relay terminal. The method specifically comprises: a first terminal receives side-link control information (SCI) sent by a second terminal, the second terminal is a Relay terminal or a Remote terminal, the Relay terminal scrambles, by using a second parameter, the SCI by using a first parameter, and the Remote terminal scrambles the SCI. The first terminal descrambles the SCI sent by the second terminal by using the first parameter. After the descrambling is successful, the first terminal receives data information sent by the second terminal. The method and apparatus provided by embodiments of the present application improve the network coverage capacity, and can be applied to the Internet of Things, such as MTC, loT, LTE-M, and M2M.

Description

Communication method and terminal device

Technical field

The present application relates to the field of communications technologies, and in particular, to a communication method and a terminal device.

Background technique

In order to improve the coverage of the base station, the user equipment in the coverage of the base station can be authorized by the base station to serve as a relay user equipment (UE) to provide a remote UE that is outside the coverage of the base station. The relay service enables the Remote UE to access the base station through the Relay UE. The Relay UE and the Remote UE can communicate directly through the device-to-device (D2D) technology on the side link (Sidelink). UEs supporting D2D technology are configured with 24-bit address information, and the UE transmits side-line control information (SCI) in the form of broadcast when communicating based on D2D technology, so each UE can Receive and decode SCIs sent by other UEs.

The communication system shown in FIG. 1 is taken as an example to describe a process in which the Remote UE and the target Relay UE perform communication based on the D2D technology, where the target Relay UE is a Relay UE that provides a relay service for the Remote UE. The communication system includes a base station and five UEs, wherein the UE1 is within the coverage of the base station, and provides relay services for the UE2 as a Relay UE, and UE2, UE3, UE4, and UE5 are both Remote UEs, and UE2, UE3, and UE4 Both UE5 are outside the coverage of the base station. The process of the UE2 communicating with the UE1 is: before the UE2 communicates with the UE1, the UE2 determines the 24-bit address information of the target Relay UE, that is, the 24-bit address information of the UE1. The UE2 receives the SCIs broadcasted by the UE1, the UE3, the UE4, and the UE5, respectively, where each SCI carries the lower 8-bit address information of the 24-bit address information corresponding to the receiving-side UE, that is, the group identifier corresponding to the receiving-side UE (Group ID) ), as well as channel resource identification, code modulation and other information. For each SCI, the UE2 determines whether the Group ID carried in the SCI is in the Group ID list saved by itself, and if so, the physical sidelink shared channel corresponding to the channel resource identifier carried in the SCI (pysical sidelink share channel) In the PSSCH, the data information is received, and the data information carries information such as 24-bit address information of the transmitting side UE that transmits the SCI. It is assumed that the Group ID carried in the SCIs sent by the UE1, the UE3, and the UE5 is in the Group ID list saved by the UE2, and the UE2 receives the data information sent by the UE1 in the PSSCH corresponding to the channel resource identifier carried by the SCI sent by the UE1, and sends the data information sent by the UE1. The PSSCH corresponding to the channel resource identifier carried by the SCI receives the data information sent by the UE3, and receives the data information sent by the UE5 in the PSSCH corresponding to the channel resource identifier carried by the SCI. Each of the data information carries the 24-bit address information of the transmitting side UE that sends the data information. Then, the UE 2 compares the 24-bit address information of the transmitting-side UE carried in the data information with the target Relay UE, that is, the 24-bit address information of the UE1, so as to filter the data information sent by the UE1 from the received data information.

The transmitting side UE adds the 24-bit address information of the transmitting side UE to the data to be transmitted at the MAC layer, obtains the MAC data packet, and then processes the MAC data packet through the physical layer to obtain the data information to be sent, so the receiving side After receiving the data information, the UE needs to process the data information at the MAC layer to process the 24 bit address information of the transmitting side UE, so as to compare the 24-bit address information of the transmitting side UE with the 24-bit address information of the target Relay UE. Therefore, the data information sent by the target Relay UE is filtered out. It can be seen that during the communication between the Remote UE and the target Relay UE, the Remote UE needs to receive and decode a large amount of data that is not needed by itself, resulting in an increase in power consumption.

Summary of the invention

The embodiment of the present application provides a communication method and a terminal device, which are used to solve the problem that the Remote UE needs to receive and decode a large amount of data that is not needed by itself when the Remote UE communicates with the target Relay UE, resulting in an increase in power consumption.

In a first aspect, the present application provides a communication method, including: the second terminal scrambles the SCI, obtains the scrambled SCI, and sends the scrambled SCI to the first terminal. Specifically, when the second terminal is a Relay terminal, the SCI is scrambled by using the first parameter. When the second terminal is a Remote terminal, the second parameter is used to scramble the SCI. The first terminal receives the SCI sent by the second terminal, and uses the first parameter to descramble the SCI sent by the second terminal. After the descrambling is successful, the first terminal receives the data information sent by the second terminal. In the embodiment of the present application, the SCI is scrambled by using the different scrambling parameters by the Relay terminal and the Remote terminal, so that the first terminal can determine whether the received SCI can be successfully descrambled based on the scrambling parameters corresponding to the Relay terminal. Determining whether the received SCI is sent by the Relay terminal, so that the SCI sent by the Remote terminal can be filtered out, and the first terminal can receive and process only the data sent by the Relay terminal, thereby greatly reducing the information received by the first terminal. The number of power consumption is reduced by the first terminal.

In one possible design, the descrambling fails, and the first terminal does not receive the data information sent by the second terminal when it does not need to communicate with any of the Remote terminals. Or, when the descrambling fails, and the first terminal needs to communicate with the at least one Remote UE, the second parameter is used to descramble the SCI sent by the second terminal, and the second terminal sends the second terminal to send Data information. In the above design, the first terminal determines whether to receive the data information sent by the second terminal by determining whether it needs to communicate with the Remote terminal, so that the first terminal can continue to receive the data information sent by the second terminal according to actual needs.

In a possible design, the SCI sent by the second terminal carries a Group ID of the receiving side terminal, and before the first terminal receives the data information sent by the second terminal, the first terminal may further determine The Group ID is in the list of Group IDs saved by itself. In the above design, by determining whether the Group ID carried by the SCI is in the Group ID list saved by the first terminal, it can be determined whether the data information sent by the second terminal is of interest to itself. If the group ID carried by the SCI is in the group ID list saved by the first terminal, the data information sent by the second terminal is interested in the first terminal, so the first terminal can continue to receive the data information sent by the second terminal. If the group ID carried by the SCI is not in the group ID list saved by the first terminal, it indicates that the data information sent by the second terminal is not of interest to the first terminal, so the first terminal may no longer receive the data information sent by the second terminal. .

In one possible design, the first parameter is a Gold sequence or an M sequence generated using a first initial value, and the second parameter is a Gold sequence or an M sequence generated using a second initial value. Alternatively, the first parameter and the second parameter may also be other types of sequences, and the sequence types adopted by the first parameter and the second parameter are not specifically limited herein.

In a second aspect, the application provides a communication method, including: the second terminal sends an SCI to the first terminal, where the SCI carries the indication information, where the indication information is used to identify the second terminal as a Relay terminal or a Remote terminal. The first terminal receives the SCI sent by the second terminal, and when the indication information identifies that the second terminal is the Relay terminal, the first terminal receives the data information sent by the second terminal. The embodiment of the present application adds the indication information for identifying the second terminal to the Relay terminal or the Remote terminal in the SCI, so that after receiving the SCI, the first terminal may determine, according to the indication information, whether the SCI is sent by the Relay terminal, such that The SCI sent by the remote terminal can be filtered out, and the first terminal can receive and process only the data sent by the relay terminal, thereby greatly reducing the number of processing data information received by the first terminal and reducing the power consumption of the first terminal.

In a possible design, when the indication information identifies that the second terminal is the Remote terminal, and the first terminal does not need to communicate with any of the Remote terminals, the first terminal does not receive Data information sent by the second terminal. Or, when the indication information identifies that the second terminal is the remote terminal, and the first terminal needs to communicate with at least one of the Remote UEs, the first terminal receives the data information sent by the second terminal. . In the above design, the first terminal determines whether to receive the data information sent by the second terminal by determining whether it needs to communicate with the Remote terminal, so that the first terminal can continue to receive the data information sent by the second terminal according to actual needs.

In a possible design, the SCI carries a Group ID of the receiving side terminal, and before the first terminal receives the data information sent by the second terminal, the first terminal may further determine that the Group ID is In the list of Group IDs saved by itself. In the above design, by determining whether the Group ID carried by the SCI is in the Group ID list saved by the first terminal, it can be determined whether the data information sent by the second terminal is of interest to itself.

In one possible design, the indication information occupies one bit. The value of the bit is 1. The indication information identifies that the second terminal is the Relay terminal, the value of the bit is 0, and the indication information identifies that the second terminal is the Remote terminal. Or the value of the bit is 1, the indication information that the second terminal is the remote terminal, the value of the bit is 0, and the indication information identifies that the second terminal is the Relay terminal.

In a third aspect, the present application provides a first terminal, including: a receiving unit, configured to receive an SCI sent by a second terminal, where the second terminal is a Relay terminal or a Remote terminal, where the Relay terminal adopts a first parameter pair. The SCI performs scrambling, and the Remote terminal scrambles the SCI with the second parameter. And a processing unit, configured to perform descrambling on the SCI sent by the second terminal received by the receiving unit by using the first parameter. The receiving unit is further configured to: after the descrambling of the processing unit is successful, receive data information sent by the second terminal.

In a possible design, the receiving unit is further configured to: when the processing unit fails to descramble, and the first terminal does not receive the second when it is not required to communicate with any Remote terminal. The data information sent by the terminal.

In a possible design, the processing unit is further configured to: when the descrambling fails, and the first terminal uses the second parameter to the second terminal when it needs to communicate with the at least one Remote UE The sent SCI is descrambled. The receiving unit is further configured to: receive data information sent by the second terminal.

In a possible design, the SCI sent by the second terminal carries a Group ID of the receiving side terminal, and the processing unit is further configured to: before the receiving unit receives the data information sent by the second terminal, determine The Group ID is in the list of Group IDs saved by itself.

In one possible design, the first parameter is a Gold sequence or an M sequence generated using a first initial value, and the second parameter is a Gold sequence or an M sequence generated using a second initial value.

In a fourth aspect, the present application provides a second terminal, including: a processing unit, configured to perform scrambling on an SCI by using a set parameter, to obtain a scrambled SCI, where the second terminal is a Relay terminal, The set parameter is a first parameter, and when the second terminal is a Remote terminal, the set parameter is a second parameter. And a sending unit, configured to send, to the first terminal, the scrambled SCI obtained by the processing unit.

In a fifth aspect, the application provides a first terminal, including: a receiving unit, configured to receive an SCI sent by a second terminal, where the SCI carries indication information, where the indication information is used to identify that the second terminal is Relay terminal or Remote terminal. The processing unit is configured to determine that the indication information identifies the second terminal as the Relay terminal. The receiving unit is further configured to: when the processing unit determines that the indication information identifies that the second terminal is the Relay terminal, receive data information sent by the second terminal.

In a possible design, the processing unit is further configured to determine that the indication information identifies the second terminal as the Remote terminal, and the first terminal does not need to perform with any of the Remote terminals. Communication. The receiving unit is further configured to: when the processing unit determines that the indication information identifies the second terminal as the Remote terminal, and the first terminal does not need to communicate with any of the Remote terminals, The data information sent by the second terminal is not received.

In a possible design, the processing unit is further configured to determine that the indication information identifies the second terminal as the Remote terminal, and the first terminal needs to communicate with at least one of the Remote UEs. The receiving unit is further configured to: when the processing unit determines that the indication information identifies the second terminal as the Remote terminal, and the first terminal receives, when it needs to communicate with at least one of the Remote terminals, Data information sent by the second terminal.

In a possible design, the SCI carries a Group ID of the receiving side terminal, and the processing unit is further configured to determine the Group ID before the first terminal receives the data information sent by the second terminal. In the list of Group IDs saved by itself.

In a sixth aspect, the application provides a second terminal, including: a processing unit, configured to configure an SCI, where the SCI carries indication information, where the indication information is used to identify that the second terminal is a Relay terminal or a Remote terminal. . And a sending unit, configured to send, to the first terminal, an SCI configured by the processing unit.

In a seventh aspect, the embodiment of the present application further provides a first terminal, where the terminal includes a processor and a memory, where the memory is used to store a software program, and the processor is configured to read a software program stored in the memory and A method provided by the first aspect or any one of the above first aspect, the second aspect, or any one of the above second aspects. The electronic device can be a mobile terminal, a computer, or the like.

In an eighth aspect, the embodiment of the present application further provides a second terminal, where the terminal includes a processor and a memory, where the memory is used to store a software program, and the processor is configured to read a software program stored in the memory and A method provided by the first aspect or any one of the above first aspect, the second aspect, or any one of the above second aspects. The electronic device can be a mobile terminal, a computer, or the like.

In a ninth aspect, the embodiment of the present application further provides a computer storage medium, where the software program stores a software program, where the software program can implement the first aspect or the first one when being read and executed by one or more processors Any of the aspects of the design, the second aspect, or any one of the above second aspects of the design.

In a tenth aspect, the embodiment of the present application provides a computer program product comprising instructions, when executed on a computer, causing a computer to perform any one of the first aspect or the first aspect, the second aspect or the foregoing Any of the two aspects of the method described.

In an eleventh aspect, an embodiment of the present application provides a chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, so as to implement the foregoing aspect or the first aspect. Any of the designs, the second aspect, or any one of the above second aspects of the design provides a method.

DRAWINGS

1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

2 is a schematic structural diagram of an LTE-A D2D system according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an application scenario according to an embodiment of the present disclosure;

4 is a schematic flowchart of a communication method according to an embodiment of the present application;

FIG. 5 is a schematic flowchart diagram of another communication method according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a first terminal according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a first terminal according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a first terminal according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a second terminal according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a second terminal according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a second terminal according to an embodiment of the present application.

detailed description

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

Providing seamless coverage is one of the main design goals of a long term evolution (LTE) system. The Long Term Evolution (LTE-Advanced) (LTE-A) based on frequency division duplexing (FDD) technology is an interference-limited system, which is blocked by tall buildings and user equipment (UE). For UEs located at the edge of the coverage of the base station, the performance of the radio link drops sharply due to interference. In particular, more and more meter reading UEs need to access the network through wireless links, and these meter reading UEs are often located in hidden underground pipelines, basements, etc., which puts higher requirements on the coverage capability of the base stations. In order to solve the coverage problem, a relay node is introduced in the Release 10 LTE protocol, and the relay node can provide access functions to UEs outside the coverage of the base station, which can solve the problem of insufficient coverage capability of the base station to a certain extent. However, the deployment of relay nodes is inconvenient, and the high cost and other defects limit its application range. In the LTE-A Release 13 version of the protocol, the narrow band internet of things (NB-IoT) is introduced. The targeted design of the NB-IoT can increase the coverage of the base station by 20 dB, but still cannot satisfy some of the deep underground. The wireless link performance requirements of the UE.

The device-to-device (D2D) specification is introduced for the first time in the Release 12 LTE protocol, that is, the UE and the UE can directly communicate through a side link. In the Release 13 LTE protocol, a relay user equipment (Relay UE) is defined. The relay UE is located in the coverage of the base station, and provides a relay service for the UE located outside the coverage of the base station, so that the UE located outside the coverage of the base station can access the base station. In the embodiment of the present application, a UE located outside the coverage of the base station may be referred to as a remote user equipment (Remote UE), and the Relay UE and the Remote UE may directly communicate through the Sidelink based on the D2D technology. The base station can authorize a UE that is in the coverage of the base station to serve as a Relay UE, and provide a relay service to the Remote UE, so that the Remote UE can access the base station, thereby improving the coverage capability of the base station.

The communication method provided by the present application can be applied to an LTE-A D2D system. The architecture of the LTE-A D2D system can be as shown in FIG. 2, wherein the LTE-A D2D system includes the terminal 201 to the terminal 203 and the network device 204, wherein the terminal 201 to the terminal 202 are Remote UEs, and the terminal 203 is a Relay UE. 201 to 202 access the network device 204 through the terminal 203. The LTE-A D2D system in the embodiment of the present application may include one or more network devices, and the number of the relay UEs may be one or multiple, and the number of the remote UEs may be one or multiple. The number of network devices included in the LTE-A D2D system, the number of Relay UEs, and the number of Remote UEs are not specifically limited herein. The Remote UEs included in the LTE-A D2D system involved in the embodiments of the present application may also communicate based on the D2D technology. The LTE-A D2D system involved in the embodiments of the present application may be various types of communication systems, for example, may be LTE, may be a fifth generation (5G) communication system, or may be a hybrid architecture of LTE and 5G. The Relay UE and the network device communicate on the uplink and the downlink through the Un port, and the Relay UE and the Remote UE communicate on the side link through the PC5 port.

The network device 204 may be a common base station (such as a Node B or an eNB), a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized network unit, or a centralized network unit. The present invention is implemented by a new wireless base station, a radio remote module, a micro base station, a distributed network unit, a transmission reception point (TRP), or a transmission point (TP) or any other wireless access device. The example is not limited to this.

The terminal 201 to the terminal 204 may be a UE, which is a device that provides voice and/or data connectivity to a user, for example, a handheld device having a wireless connection function, an in-vehicle device, or the like. Common terminals include, for example, mobile phones, tablets, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and the like. The terminal device involved in the embodiment of the present application can communicate with other terminal devices based on the D2D technology.

The network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application. The technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

Before the remote UE communicates with the network device, it establishes a layer 2 connection of the pair of side links with the target relay UE, and then accesses the network device through the target Relay UE, and the target relay UE provides the relay for the remote UE. Service Relay UE. The process of establishing the layer 2 connection between the remote UE and the target relay UE is as follows: the terminal supporting the D2D technology is configured with a 24 bit layer 2 user equipment address (UE identification), and when the Remote UE establishes a layer 2 connection with the Relay UE, the first is Remote. The UE performs a Relay UE discovery process to determine the 24-bit ID of the target Relay UE. In the subsequent communication process, by comparing the 24-bit ID carried by the received data with the 24-bit ID of the target Relay UE, it can be identified whether the received data is the data transmitted by the target Relay UE.

The Relay UE discovery process is currently implemented in two ways. The first method is that the relay UE selects a resource in the Discovery resource pool and broadcasts a Discovery message. The broadcasted Discovery message includes information such as the 24-bit ID of the Relay UE and the type of the relay service provided by itself. The Remote UE determines the target Relay UE according to the received Discovery message and records the 24-bit ID of the target Relay UE. The second method is that the Remote UE sends a relay request Discovery message, and after receiving the message, the target Relay UE sends a response to the Discovery message. The Remote UE determines the 24-bit ID of the target Relay UE according to the received response Discovery message. In either of the above two manners, the Remote UE can know the 24-bit ID of the target Relay UE.

After the Remote UE establishes a layer 2 connection with the target Relay UE, it can communicate based on the D2D technology. The process in which the remote UE communicates with the target relay UE based on the D2D technology is: when the UE performs communication based on the D2D technology, the sidelink control information (SCI) is transmitted in the form of a broadcast, and the fixed scrambling code sequence pair is adopted. The SCI performs scrambling, so each UE can receive and decode SCIs sent by other UEs. When the remote UE communicates with the target relay UE based on the D2D technology, the remote UE receives the SCIs broadcast by the multiple UEs, where each SCI carries the lower 8 bits of the address information of the corresponding 24-UE ID of the receiving side UE, that is, the corresponding receiving side. The group ID of the UE, and the channel resource identifier, code modulation mode, and the like corresponding to the channel resource used for transmitting the data information. For each SCI, the Remote UE determines whether the Group ID carried in the SCI is in the Group ID list saved by itself, and if so, the physical side shared channel corresponding to the channel resource identifier carried by the SCI (pysical sidelink share channel, In the PSSCH, the data information is received, and the data information carries information such as a 24-bit ID of the UE that sends the data information, and then the received data information is decoded to determine a 24-bit ID of the UE that sends the data information, and the data information is sent. The 24 bit ID of the UE is compared with the 24 bit ID of the target Relay UE to determine whether the data information is sent by the target Relay UE, so that the data information sent by the target Relay UE is filtered out from the received data information.

When transmitting data by using the D2D technology, the transmitting side UE first adds the 24 bit ID of the transmitting side UE to the to-be-sent data at the MAC layer to obtain a MAC data packet, and then processes the MAC data packet through the physical layer to obtain a to-be-sent. The data. After receiving the data information, the receiving side UE needs to process the data information at the MAC layer to process the 24 bit ID of the transmitting side UE, so as to compare the 24 bit ID of the transmitting side UE with the 24 bit ID of the target Relay UE. Thereby, the data information sent by the target Relay UE is filtered out.

For the application scenario of the extended coverage of the Internet of Things, the Remote UE that is outside the coverage of the network device mainly needs to communicate with the Relay UE to access the network device. However, when there are a large number of UEs in the same group, then many UEs have the same Group ID, and the receiving side Remote UE will receive and decode the data sent by other Remote UEs carrying the same Group ID as the Relay UE. Until the MAC layer, the 24-bit ID of the transmitting side UE is decoded, and the data that is not sent by the Relay UE can be filtered out. For example, as shown in FIG. 3, the group IDs of UE1 to UE4 are the same, and the Relay UE sends the SCI to the UE1. At the same time, the UE2, the UE3, and the UE4 send the SCI to the Relay UE, and the SCIs that they send carry the same 8-bit group. ID. UE1 will consider that the data sent by UE2, UE3 and UE4 are all sent by the Relay UE. As a result, all the data sent by UE2, UE3, UE4 and Relay UE will be received and decoded until the MAC layer can distinguish which data is sent by Relay UE. of. Therefore, in the whole process, the receiving side Remote UE cannot distinguish between the data sent by the Relay UE and the data sent by the Remote UE at the physical layer, so that the physical layer needs to receive and decode a large amount of data that is not needed by itself, resulting in an increase in power consumption, which is limited in power. The low-power IoT device is a serious flaw.

During the communication between the Remote UE and the target Relay UE, the Remote UE needs to receive and decode a large amount of data that is not needed by itself, resulting in an increase in power consumption. The present application provides a communication method and a terminal device. The method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.

Hereinafter, some of the terms in the present application will be explained to be understood by those skilled in the art.

Multiple means two or more.

In addition, it should be understood that in the description of the present application, the terms "first", "second" and the like are used only to distinguish the purpose of description, and are not to be understood as indicating or implying relative importance, nor as an indication. Or suggest the order.

Referring to FIG. 4, a flow chart of a communication method provided by the present application is provided. The method can be applied to the LTE-A D2D system shown in FIG. 2, the method comprising:

S401. The second terminal scrambles the SCI to obtain the scrambled SCI. Specifically, when the second terminal is a Relay terminal, the SCI is scrambled by using the first parameter. When the second terminal is a Remote terminal, the second parameter is used to scramble the SCI. The SCI sent by the second terminal carries information such as a group ID corresponding to the receiving side terminal, a channel resource identifier corresponding to the channel resource for transmitting the data information, and a code modulation mode. Step S402 is performed.

The first parameter is a Gold sequence or an M sequence generated by using a first initial value, and the second parameter is a Gold sequence or an M sequence generated by using a second initial value. Of course, the first parameter and the second parameter may also be For other types of sequences, the sequence types adopted by the first parameter and the second parameter are not specifically limited in the embodiment of the present application. The second parameter may be a fixed sequence used by the terminal supporting the D2D technology in the prior art to scramble the SCI.

S402. The second terminal sends the scrambled SCI to the first terminal. Step S403 is performed.

S403. The first terminal uses the first parameter to descramble the SCI sent by the second terminal. Step S404 is performed.

S404. The first terminal determines whether the SCI sent by the second terminal is successfully descrambled. If yes, step S405 may be performed; if not, step S407 may be performed.

By determining whether the SCI sent by the second terminal is successfully descrambled by using the first parameter, it can be identified whether the SCI is sent by the Relay terminal. If the descrambling is successful, the SCI is sent by the Relay terminal, that is, the second terminal is a Relay terminal. If the descrambling fails, the SCI is sent by the Remote terminal, that is, the second terminal is a Remote terminal.

S405. The first terminal determines whether the group ID carried by the SCI is in a group ID list saved by the first terminal. If yes, step S406 is performed. If not, the data information sent by the second terminal is no longer received.

By determining whether the Group ID carried by the SCI is in the Group ID list saved by the first terminal, it can be determined whether the data information sent by the second terminal is interested in itself. If the group ID carried by the SCI is in the group ID list saved by the first terminal, the data information sent by the second terminal is interested in the first terminal, so the first terminal can continue to receive the data information sent by the second terminal. If the group ID carried by the SCI is not in the group ID list saved by the first terminal, it indicates that the data information sent by the second terminal is not of interest to the first terminal, so the first terminal may no longer receive the data information sent by the second terminal. .

S406. The first terminal receives the data information sent by the second terminal on the channel resource corresponding to the channel resource identifier carried in the SCI sent by the second terminal.

In the embodiment of the present application, the SCI is scrambled by using the different scrambling parameters by the Relay terminal and the Remote terminal, so that the first terminal can determine whether the received SCI can be successfully descrambled based on the scrambling parameters corresponding to the Relay terminal. Determining whether the received SCI is sent by the Relay terminal, so that the SCI sent by the Remote terminal can be filtered out, and the first terminal can receive and process only the data sent by the Relay terminal, thereby greatly reducing the information received by the first terminal. The number of power consumption is reduced by the first terminal.

S407. The first terminal determines whether communication with at least one Remote terminal is required. If yes, step S408 can be performed. If no, step S409 can be performed.

S408: The first terminal uses the second parameter to descramble the SCI sent by the second terminal, and receives the data information sent by the second terminal on the channel resource corresponding to the channel resource identifier carried in the SCI sent by the second terminal.

S409. The first terminal does not receive the data information sent by the second terminal.

If the first terminal fails to descramble the SCI sent by the second terminal by using the first parameter, it indicates that the SCI is sent by the Remote terminal, that is, the second terminal is a Remote terminal. If the first terminal does not need to communicate with any Remote terminal, that is, the first terminal does not need to receive data sent by the Remote terminal, the first terminal may no longer receive the data information sent by the second terminal. If the first terminal needs to communicate with the remote terminal, that is, the first terminal also needs to receive the data sent by the remote terminal, the first terminal may continue to receive the data information sent by the second terminal according to actual needs.

Referring to FIG. 5, a flow chart of another communication method provided by the present application is provided. The method can be applied to the LTE-A D2D system shown in FIG. 2, the method comprising:

S501: The second terminal sends an SCI to the first terminal, where the SCI carries the indication information, where the indication information is used to identify that the second terminal is a Relay terminal or a Remote terminal. The SCI sent by the second terminal carries information such as a group ID corresponding to the receiving side terminal, a channel resource identifier corresponding to the channel resource for transmitting the data information, a coding and modulation mode, and the like. The SCI sent by the second terminal may add at least one bit of indication information in addition to the information specified in the protocol LTE D2D. For example, the indication information occupies one bit, and the value of the bit is 1. The indication information may identify that the second terminal is a Relay terminal, and the value of the bit is 0, and the indication information identifies that the second terminal is a Remote terminal. Alternatively, the value of the bit is 1, and the indication information may also identify that the second terminal is a Remote terminal, and the value of the bit is 0, indicating that the second terminal is a Relay terminal. The second terminal may continue to scramble the SCI by using a fixed sequence used by the terminal supporting the D2D technology in the prior art to scramble the SCI. Step S502 can be performed.

S502. The first terminal performs descrambling on the SCI sent by the second terminal. The first terminal may continue to descramble the SCI sent by the second terminal by using a fixed sequence used by the terminal supporting the D2D technology in the prior art to scramble the SCI. Step S503 can be performed.

S503. The first terminal determines whether the group ID carried by the SCI is in a group ID list saved by the first terminal. If yes, step S504 is performed. If not, the data information sent by the second terminal is no longer received.

S504: The first terminal determines whether the indication identifier carried by the SCI identifies that the second terminal is a Relay terminal. If yes, step S505 is performed. If not, step S506 can be performed.

S505: The first terminal receives the data information sent by the second terminal on the channel resource corresponding to the channel resource identifier carried in the SCI sent by the second terminal.

In the embodiment of the present application, by adding the indication information of 1 bit in the SCI, the first terminal may determine, according to the indication information, whether the SCI is sent by the Relay terminal after receiving the SCI, so that the SCI sent by the Remote terminal may be filtered out. A terminal can receive and process only the data sent by the relay terminal, thereby greatly reducing the number of processing data information received by the first terminal and reducing the power consumption of the first terminal.

S506. The first terminal determines whether communication with at least one Remote terminal is required. If yes, step S507 can be performed. If not, step S508 can be performed.

S507. The first terminal receives the data information sent by the second terminal on the channel resource corresponding to the channel resource identifier carried in the SCI sent by the second terminal.

S508. The first terminal does not receive the data information sent by the second terminal.

If the first terminal determines that the second terminal is a Remote terminal according to the indication information carried in the SCI, and the first terminal does not need to communicate with any Remote terminal, that is, the first terminal does not need to receive data sent by the Remote terminal, first. The terminal can no longer receive the data information sent by the second terminal. If the first terminal determines that the second terminal is a remote terminal according to the indication information carried in the SCI, and the first terminal needs to communicate with the remote terminal, that is, the first terminal also needs to receive data sent by the remote terminal, the first terminal may The data information sent by the second terminal is continuously received according to actual needs.

Based on the same inventive concept as the method embodiment, the embodiment of the present application provides a first terminal, specifically for implementing the method described in the embodiment of FIG. 4, the structure of the device is as shown in FIG. 6, and includes: a receiving unit. 601. The SCI is used to receive the SCI sent by the second terminal, where the second terminal is a Relay terminal or a Remote terminal, the Relay terminal uses the first parameter to scramble the SCI, and the Remote terminal uses the second parameter to add the SCI. Disturb. The processing unit 602 is configured to perform descrambling on the SCI sent by the second terminal received by the receiving unit 601 by using the first parameter. The receiving unit 601 is further configured to: after the descrambling of the processing unit 602 is successful, receive data information sent by the second terminal.

The receiving unit 601 is further configured to: when the processing unit 602 fails to descramble, and the first terminal does not receive the data information sent by the second terminal when it is not required to communicate with any Remote terminal. .

The processing unit 602 may be further configured to: when the processing unit 602 fails to descramble, and the first terminal sends the second parameter to the second terminal by using the second parameter when it needs to communicate with the at least one Remote UE. The SCI is descrambled. The receiving unit 601 is further configured to: receive data information sent by the second terminal.

Optionally, the SCI sent by the second terminal carries the group ID of the receiving terminal, and the processing unit 602 is configured to determine the group before the receiving unit 601 receives the data information sent by the second terminal. The ID is in the list of Group IDs saved by itself.

In a possible implementation manner, the first parameter is a Gold sequence or an M sequence generated by using a first initial value, and the second parameter is a Gold sequence or an M sequence generated by using a second initial value.

Based on the same inventive concept as the method embodiment, the embodiment of the present application provides a first terminal, specifically for implementing the method described in the embodiment of FIG. 5, the structure of the device is as shown in FIG. 7, and includes: a receiving unit. 701. The SCI is configured to receive the SCI sent by the second terminal, where the SCI carries the indication information, where the indication information is used to identify that the second terminal is a Relay terminal or a Remote terminal. The processing unit 702 is configured to determine that the indication information identifies the second terminal as the Relay terminal. The receiving unit 701 is further configured to: when the processing unit 702 determines that the indication information identifies that the second terminal is the Relay terminal, and receives data information sent by the second terminal.

The processing unit 702 is further configured to determine that the indication information identifies the second terminal as the Remote terminal, and the first terminal does not need to communicate with any of the Remote terminals. The receiving unit 701 is further configured to determine, by the processing unit 702, that the indication information identifies the second terminal as the Remote terminal, and the first terminal does not need to communicate with any of the Remote terminals. When the data information sent by the second terminal is not received.

The processing unit 702 is further configured to determine that the indication information identifies that the second terminal is the Remote terminal, and the first terminal needs to communicate with at least one of the Remote UEs. The receiving unit 701 is further configured to: when the processing unit 702 determines that the indication information identifies the second terminal as the Remote terminal, and the first terminal needs to communicate with at least one of the Remote UEs, Receiving data information sent by the second terminal.

In a possible implementation manner, the SCI carries a Group ID of the receiving side terminal, and the processing unit 702 is further configured to determine, before the first terminal receives the data information sent by the second terminal, The Group ID is in the list of Group IDs saved by itself.

Optionally, the indication information occupies one bit. The value of the bit is 1, the indication information identifies that the second terminal is the Relay terminal, the value of the bit is 0, and the indication information identifies that the second terminal is the Remote terminal. Or the value of the bit is 1, the indication information that the second terminal is the remote terminal, the value of the bit is 0, and the indication information identifies that the second terminal is the Relay terminal.

The division of the modules in the embodiment of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner. In addition, each functional module in each embodiment of the present application may be integrated into one processing. In the device, it can also be physically existed alone, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules.

Wherein, when the integrated module can be implemented in the form of hardware, as shown in FIG. 8, the first terminal may include the processor 802. The hardware of the entity corresponding to the above module may be the processor 802. The processor 802 can be a central processing unit (CPU), or a digital processing module or the like. The first terminal may further include a communication interface 801, and the processor 802 performs data transmission and reception through the communication interface 801. The apparatus also includes a memory 803 for storing programs executed by the processor 802. The memory 803 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory such as a random access memory (random). -access memory, RAM). Memory 803 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

The processor 802 is configured to execute the program code stored in the memory 803, specifically for performing any one of the methods described in the embodiment shown in FIG. 4 or FIG. 5. For the method described in the embodiment shown in FIG. 4 or FIG. 5, the application is not described herein again.

The specific connection medium between the communication interface 801, the processor 802, and the memory 803 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 803, the processor 802, and the communication interface 801 are connected by a bus 804 in FIG. 8. The bus is indicated by a thick line in FIG. 8, and the connection manner between other components is only schematically illustrated. , not limited to. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 8, but it does not mean that there is only one bus or one type of bus.

Based on the same inventive concept as the method embodiment, the embodiment of the present application provides a second terminal, specifically for implementing the method described in the embodiment of FIG. 4, the structure of the device is as shown in FIG. 9, and includes: a processing unit 901. The SCI is used to scramble the SCI by using the set parameter to obtain the scrambled SCI. When the second terminal is a Relay terminal, the set parameter is a first parameter, and when the second terminal is a Remote terminal, The parameter set is the second parameter. The sending unit 902 is configured to send, to the first terminal, the scrambled SCI obtained by the processing unit.

Optionally, the first parameter is a Gold sequence or an M sequence generated by using a first initial value, and the second parameter is a Gold sequence or an M sequence generated by using a second initial value.

Based on the same inventive concept as the method embodiment, the embodiment of the present application provides a second terminal, specifically for implementing the method described in the embodiment of FIG. 5, the structure of the device is as shown in FIG. 10, and includes: a processing unit 1001, configured to construct an SCI, where the SCI carries indication information, where the indication information is used to identify that the second terminal is a Relay terminal or a Remote terminal. The sending unit 1002 is configured to send, to the first terminal, the SCI configured by the processing unit 1001.

Optionally, the indication information occupies one bit. The value of the bit is 1. The indication information identifies that the second terminal is the Relay terminal, the value of the bit is 0, and the indication information identifies that the second terminal is the Remote terminal. Or the value of the bit is 1, the indication information that the second terminal is the remote terminal, the value of the bit is 0, and the indication information identifies that the second terminal is the Relay terminal.

Wherein, when the integrated module can be implemented in the form of hardware, as shown in FIG. 11, the second terminal may include the processor 1102. The hardware of the entity corresponding to the above module may be the processor 1102. The processor 1102 can be a CPU, or a digital processing module or the like. The second terminal may further include a communication interface 1101, and the processor 1102 performs data transmission and reception through the communication interface 1101. The apparatus also includes a memory 1103 for storing programs executed by the processor 1102. The memory 1103 may be a non-volatile memory such as an HDD or an SSD or the like, or may be a volatile memory such as a RAM. Memory 1103 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

The processor 1102 is configured to execute the program code stored in the memory 1103, specifically for performing any one of the methods described in the embodiment shown in FIG. 4 or FIG. 5. For the method described in the embodiment shown in FIG. 4 or FIG. 5, the application is not described herein again.

The specific connection medium between the communication interface 1101, the processor 1102, and the memory 1103 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 1103, the processor 1102, and the communication interface 1101 are connected by a bus 1104 in FIG. 11, and the bus is indicated by a thick line in FIG. 11, and the connection manner between other components is only schematically illustrated. , not limited to. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.

The embodiment of the present invention further provides a chip, which includes the above communication interface and the foregoing processor, and is used to support the first terminal to implement any one of the methods described in the embodiments shown in FIG. 4 and FIG. 5.

The embodiment of the present invention further provides another chip, which includes the above communication interface and the foregoing processor, and is used to support the second terminal to implement any one of the methods described in the embodiments shown in FIG. 4 and FIG. 5.

The embodiment of the present application further provides a computer readable storage medium for storing computer software instructions required to execute the foregoing processor, which includes a program for executing the above-mentioned processor.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A communication method, comprising:

The first terminal receives the side frame control information SCI sent by the second terminal, where the second terminal is a relay relay terminal or a remote remote terminal, and the relay terminal uses the first parameter to scramble the SCI, the Remote The terminal uses the second parameter to scramble the SCI;

Decoding the SCI sent by the second terminal by using the first parameter by using the first parameter;

After the descrambling is successful, the first terminal receives the data information sent by the second terminal.
The method of claim 1 wherein the method further comprises:

When the descrambling fails, and the first terminal does not need to communicate with any Remote terminal, does not receive the data information sent by the second terminal; or

When the descrambling fails, and the first terminal needs to communicate with the at least one remote terminal, the second parameter is used to descramble the SCI sent by the second terminal, and the second terminal sends the Data information.
The method according to claim 1 or 2, wherein the SCI sent by the second terminal carries a group address Group ID of the receiving side terminal, and the first terminal receives the data information sent by the second terminal. Previously, the method further includes:

The first terminal determines that the Group ID is in a group ID list saved by itself.
The method according to any one of claims 1 to 3, wherein the first parameter is a Gold sequence or an M sequence generated by using a first initial value, and the second parameter is generated by using a second initial value. Gold sequence or M sequence.
A communication method, comprising:

The second terminal uses the set parameters to scramble the side-line control information SCI to obtain the scrambled SCI, and when the second terminal is the relay relay terminal, the set parameter is the first parameter, When the second terminal is a remote remote terminal, the set parameter is a second parameter;

The second terminal sends the scrambled SCI to the first terminal.
The method according to claim 5, wherein the first parameter is a Gold sequence or an M sequence generated by using a first initial value, and the second parameter is a Gold sequence or an M sequence generated by using a second initial value. .
A first terminal, comprising:

a receiving unit, configured to receive the side-line control information SCI sent by the second terminal, where the second terminal is a relay relay terminal or a remote remote terminal, and the relay terminal uses the first parameter to scramble the SCI. The Remote terminal uses the second parameter to scramble the SCI;

a processing unit, configured to perform descrambling on the SCI sent by the second terminal received by the receiving unit by using the first parameter;

The receiving unit is further configured to: after the descrambling of the processing unit is successful, receive data information sent by the second terminal.
The first terminal according to claim 7, wherein the receiving unit is further configured to: when the processing unit descrambles fails, and the first terminal does not need to communicate with any Remote terminal And not receiving the data information sent by the second terminal.
The first terminal according to claim 7, wherein the processing unit is further configured to: when the descrambling fails, and the first terminal needs to communicate with at least one Remote terminal, adopting the The second parameter descrambles the SCI sent by the second terminal;

The receiving unit is further configured to: receive data information sent by the second terminal.
The first terminal according to any one of claims 7 to 9, wherein the SCI sent by the second terminal carries a group address Group ID of the receiving side terminal, and the processing unit is further configured to: Before receiving the data information sent by the second terminal, the receiving unit determines that the Group ID is in the Group ID list saved by itself.
The first terminal according to any one of claims 7 to 10, wherein the first parameter is a Gold sequence or an M sequence generated by using a first initial value, and the second parameter is a second initial value. The generated Gold sequence or M sequence.
A second terminal, comprising:

a processing unit, configured to perform scrambling on the side-line control information SCI by using the set parameter, to obtain a scrambled SCI, where the set parameter is a first parameter, when the second terminal is a relay relay terminal, When the second terminal is a remote remote terminal, the set parameter is a second parameter;

And a sending unit, configured to send, to the first terminal, the scrambled SCI obtained by the processing unit.
The second terminal according to claim 12, wherein the first parameter is a Gold sequence or an M sequence generated by using a first initial value, and the second parameter is a Gold sequence generated by using a second initial value or M sequence.