WO2022247831A1

WO2022247831A1 - Terminal device communication method, apparatus and system

Info

Publication number: WO2022247831A1
Application number: PCT/CN2022/094743
Authority: WO
Inventors: 许胜锋
Original assignee: 华为技术有限公司
Priority date: 2021-05-25
Filing date: 2022-05-24
Publication date: 2022-12-01
Also published as: CN115396853A

Abstract

Embodiments of the present application provide a communication method, apparatus and system. The method comprises: a first terminal device sends a first message to a first area, the first area satisfying at least one of the following: the first area is located in a first direction of the first terminal device, or the distance between the first area and the first terminal device is within a first distance range; the first terminal device receives one or more response messages, the one or more response messages comprising identification information of one or more second terminal devices and the one or more second terminal devices being located in the first area; and the first terminal device determines a first response message in the one or more response messages to be a response message of a target terminal device, the first response message comprising identification information of the target terminal device. By means of the method, the first terminal device may identify a specific target terminal device without knowing the identifier of the target terminal device, and eventually discover the target terminal device.

Description

Communication method, device and system for terminal equipment

This application claims the priority of the Chinese patent application with the application number 202110573372.3 and the application title "Communication method, device and system for terminal equipment" submitted to the State Intellectual Property Office of China on May 25, 2021, the entire contents of which are incorporated by reference in this application.

technical field

The present application relates to the communication field, and in particular to a communication method, device and system for terminal equipment.

Background technique

Device-to-Device (Device-to-Device, D2D) communication is a method that allows multiple terminal devices to communicate directly. This communication technology allows the multiple user equipments to share spectrum resources under the control of the cell network, so that the spectrum The utilization rate of resources has been effectively improved. This communication technology supports one-to-one communication and one-to-many communication between terminal devices. In the one-to-one communication technology, when the distance between the source terminal device and the target terminal device is within the distance range supporting D2D communication (the distance range may depend on practical applications), the two can communicate directly after discovering each other.

The discovery between the source terminal device and the target terminal device can be realized through D2D discovery parameters. When the source terminal device wants to discover the target terminal device, the discovery parameter is included in the message sent by the source terminal device for discovering the target terminal device. For example, the discovery parameters are application-based discovery parameters. At least one terminal device other than the source terminal device and the target terminal device also holds the application-based discovery parameter. The source terminal device can thus discover one or more terminal devices including the target terminal device. However, with the above method, the source terminal device cannot identify the target terminal device from the one or more terminal devices without specifying the identity of the target terminal device.

Contents of the invention

This application describes a communication method, device and system for terminal equipment.

In a first aspect, embodiments of the present application provide a communication method for a terminal device, where the method is executed by a first terminal device. The method includes: the first terminal device sends a first message to a first area, and the first area satisfies at least one of the following: the first area is located in a first direction of the first terminal device, or the first area The distance from the first terminal device is within a first distance range; the first terminal device receives one or more response messages, and the one or more response messages include identification information of one or more second terminal devices, The one or more second terminal devices are located in the first area; the first terminal device determines that the first response message among the one or more response messages is a response message of the target terminal device, and the first response message includes the Identification information of the target terminal device. Through the above solution, the first terminal device sends a first message to one or more second terminal devices in the first area that meet certain conditions, and the first terminal device receives one or more responses from one or more second terminal devices The message determines that the first response message is the response message of the target terminal device, and obtains the identification information of the target terminal device from the response message of the target terminal device, so that when the first terminal device does not know the identification information of the target terminal device In this case, the discovery of the target terminal device is realized.

For example, "the one or more response messages include identification information of one or more second terminal devices" may be understood as "each of the one or more response messages includes identification information of a second terminal device" , that is, each second terminal device among the one or more second terminal devices sends a response message, and the response message sent by each second terminal device includes the identification information of the second terminal device. The above description is also applicable to the methods provided in other aspects of the present application, and will not be repeated here.

For example, sending the first message to the first area can be understood as sending the first message to one or more second terminal devices in the first area, and can also be understood as sending the first message to one or more second terminal devices in the first direction Sending the first message may also be understood as sending the first message to one or more second terminal devices whose distance from the first terminal device is within a first distance range.

In a possible implementation manner, the first terminal device determining that the first response message in the one or more response messages is a response message of the target terminal device includes: determining, by a neighbor-based service layer of the first terminal device, that the The first response message in the one or more response messages is a response message of the target terminal device.

In a possible implementation manner, the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device, including: the first terminal device The service layer based on the neighbor of the first terminal device receives the distance between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; the service layer based on the neighbor of the first terminal device according to the The first distance range and the distance between the one or more second terminal devices and the first terminal device determine that the first response message among the one or more response messages is a response message of the target terminal device. It can be understood that "the distance between the one or more second terminal devices and the first terminal device" in this embodiment can be understood as "the distance between each of the one or more second terminal devices The distance between the terminal device and the first terminal device", that is to say, the distance may be different with the second terminal device. The above description is also applicable to the methods provided by this aspect and other aspects of this application, and no longer repeat. Specifically, the neighbor-based service layer of the first terminal device compares the first distance range with, and the distance between one or more second terminal devices and the first terminal device, and obtains from the one or more response messages The response message of the target terminal device is selected, that is, the first response message. Wherein, the distance between the target terminal device and the first terminal device satisfies the first distance range, in other words, if the distance between a terminal device and the first terminal device satisfies the first distance range, then the terminal device is the target For a terminal device, if the distance between the terminal device and the first terminal device does not meet the first distance range, then the terminal device is not the target terminal device, and the response message of the terminal device is also not the response message of the target terminal device. This specific implementation method is also applicable to this aspect or other aspects of this application regarding how to "determine the one or more second terminal devices based on the first distance range and the distance between the first terminal device and the or the first response message among the multiple response messages is the response message of the target terminal device", which will not be repeated here.

In a possible implementation manner, the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device, including: the first terminal device The neighbor-based service layer of the first terminal device receives the time-of-flight between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; the neighbor-based service layer of the first terminal device according to The time-of-flight between the one or more second terminal devices and the first terminal device determines the distance between the one or more second terminal devices and the first terminal device; The service layer determines that the first response message among the one or more response messages is the target terminal device according to the first distance range and the distance between the one or more second terminal devices and the first terminal device Respond to the message. Specifically, the neighbor-based service layer of the first terminal device is based on the aforementioned formula in the specification, and the flight time between one or more second terminal devices and the first terminal device is multiplied by the speed of light to obtain one or more second terminal devices The distance between the device and the first terminal device. This specific implementation method is also applicable to this aspect or other aspects of this application regarding how to "determine the one or more second terminal devices according to the flight time between the one or more second terminal devices and the first terminal device The description of the distance between the device and the first terminal device". Likewise, the flight time in this embodiment is the flight time between one or more second terminal devices and the first terminal device. It can be understood that each second terminal device has a flight time with the first terminal device. Time, that is to say, the flight time is one or more, depending on the number of second terminal devices, and will not be described in detail below.

In a possible implementation manner, the first terminal device determining that the first response message in the one or more response messages is a response message of the target terminal device includes: the access layer of the first terminal device determining that the The first response message in the one or more response messages is a response message of the target terminal device. This implementation manner can reduce the interaction between the access layer of the first terminal device and the neighbor-based service layer of the first terminal device, and reduce the complexity of internal processing of the terminal device.

In a possible implementation manner, the access layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device, including: the access layer of the first terminal device The entry layer receives the first distance range from the neighbor-based service layer of the first terminal device; the access layer of the first terminal device determines the distance between the one or more second terminal devices and the first terminal device ; The access layer of the first terminal device determines the first in the one or more response messages according to the first distance range and the distance between the one or more second terminal devices and the first terminal device. The response message is a response message of the target terminal device.

In a possible implementation manner, the access layer of the first terminal device determines the distance between the one or more second terminal devices and the first terminal device, including: the access layer of the first terminal device according to The time point corresponding to the source layer 2 identification information used to send the first message, and the time point corresponding to the destination layer 2 identification information used to receive the one or more response messages to determine the flight time; the first terminal device The access layer determines the distance between the one or more second terminal devices and the first terminal device according to the flight time. Specifically, when the access layer of the first terminal device uses the source layer 2 identification information to send the first message, record the first time point, and when the access layer of the first terminal device receives the one or more response messages, Respectively record the destination layer 2 identification information corresponding to each response message and the corresponding second time point when the response message is received, and when the source layer 2 identification information is the same as the destination layer 2 identification information, calculate the first time point and the second time point The time difference at the time point, that is, the second time information, subtract the second time information from the first time information carried in the response message to obtain the third time information, and divide the third time information by 2 to obtain the first time information The flight time between the second terminal device and the first terminal device is the same as for other second terminal devices.

In a possible implementation manner, the first terminal device sending the first message to the first area includes: the access layer of the first terminal device receiving the first message from the neighbor-based service layer of the first terminal device and demand information; the access layer of the first terminal device sends the first message to the first area according to the demand information. It can be understood that the access layer of the first terminal device sends the first message to the first area according to the requirement information, so that the first area in this aspect meets the above conditions, in other words, the target terminal device The location of the first terminal device is consistent with the demand information. Through the method of this embodiment, the first terminal device sends a message to the area where the target terminal device is located, which prevents more terminal devices that are not the target terminal device from receiving and feeding back response messages, and reduces the number of response messages for subsequent determination of the target terminal device. of complexity.

In a second aspect, the embodiments of the present application provide a communication method for a terminal device, where the method is executed by a first terminal device. The method includes: the first terminal device sends a first message; the first terminal device receives one or more response messages; the first terminal device determines that the first response message in the one or more response messages is the target terminal device A response message, where the first response message includes the identification information of the target terminal device, where the first response message satisfies at least one of the following: the first response message comes from a first direction, or, according to the first The distance between the target terminal device and the first terminal device obtained from the response message is within a first distance range. Through the above solution, the first terminal device sends a first message to one or more second terminal devices, the first message is an omnidirectional message, and the first terminal device receives one or more responses from one or more second terminal devices The message determines that the first response message is the response message of the target terminal device, and obtains the identification information of the target terminal device from the response message of the target terminal device, so that when the first terminal device does not know the identification information of the target terminal device In this case, the discovery of the target terminal device is realized.

In a possible implementation manner, the method further includes: the one or more response messages include identifiers of one or more second terminal devices, and the target terminal device is one of the one or more second terminal devices .

In a possible implementation manner, the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device, including: the first terminal device The service layer based on the neighbor of the first terminal device receives the distance between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; the service layer based on the neighbor of the first terminal device according to the The first distance range and the distance between the one or more second terminal devices and the first terminal device determine that the first response message among the one or more response messages is a response message of the target terminal device.

In a possible implementation manner, the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device, including: the first terminal device The neighbor-based service layer of the first terminal device receives the time-of-flight between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; the neighbor-based service layer of the first terminal device according to The time-of-flight between the one or more second terminal devices and the first terminal device determines the distance between the one or more second terminal devices and the first terminal device; The service layer determines that the first response message among the one or more response messages is the target terminal device according to the first distance range and the distance between the one or more second terminal devices and the first terminal device Respond to the message.

In a possible implementation manner, the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device, including: the first terminal device The neighbor-based service layer receives the direction between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; the neighbor-based service layer of the first terminal device according to the The first direction and the direction between the one or more second terminal devices and the first terminal device determine that the first response message among the one or more response messages is a response message of the target terminal device. It can be understood that "the direction between the one or more second terminal devices and the first terminal device" in this embodiment can be understood as "the direction between each of the one or more second terminal devices The direction between the terminal device and the first terminal device", that is to say, the direction may be different depending on the second terminal device. The above description is also applicable to the methods provided by this aspect and other aspects of this application, and no longer repeat. Specifically, the neighbor-based service layer of the first terminal device compares the first direction and the directions between one or more second terminal devices and the first terminal device, and when one or more second terminal devices and the The direction between the first terminal devices is the same as the first direction, or within the allowable error range deviating from the first direction, the service layer based on the neighbors of the first terminal device selects the second terminal device that satisfies the above conditions (i.e. target terminal device), that is, determine that the first response message in the one or more response messages is the response message of the target terminal device. This specific implementation manner is also applicable to this aspect or other aspects of this application regarding how "the neighbor-based service layer of the first terminal device is based on the first direction and the relationship between the one or more second terminal devices and the first The direction between the terminal devices, the first response message among the one or more response messages is determined to be the response message of the target terminal device" and will not be repeated here.

In a possible implementation manner, the first terminal device determining that the first response message in the one or more response messages is a response message of the target terminal device includes: the access layer of the first terminal device determining that the The first response message in the one or more response messages is a response message of the target terminal device.

In a possible implementation manner, the access layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device, including: the access layer of the first terminal device The entry layer receives the first direction from the neighbor-based service layer of the first terminal device; the access layer of the first terminal device determines the direction between the one or more second terminal devices and the first terminal device; The access layer of the first terminal device determines the first response message among the one or more response messages according to the first direction and the direction between the one or more second terminal devices and the first terminal device It is the response message of the target terminal device.

In a possible implementation manner, the one or more response messages include time information, and the time information is used to determine a distance between the one or more second terminal devices and the first terminal device. For example, the time information may be the time difference between the time point when the second terminal device receives the first message and the time point when the response message is sent.

In a possible implementation manner, the method further includes: the first terminal device acquires demand information, where the demand information includes at least one of the following: direction demand information used to determine the first direction, or used to determine The distance requirement information of the first distance range.

In a possible implementation manner, the obtaining the demand information by the first terminal device includes: obtaining the demand information by a neighbor-based service layer of the first terminal device. For example, in an optional implementation manner, the neighbor-based service layer of the first terminal device generates the requirement information according to instruction information from the terminal device.

In a possible implementation manner, the neighbor-based service layer of the first terminal device acquires the demand information, including:

The neighbor-based service layer of the first terminal device acquires the demand information from the application layer of the first terminal device.

In a possible implementation manner, the distance requirement information includes at least one of the following: a first distance range, or a first power, and the first power is used to determine the first distance range. For example, the first power is the sending power of the first terminal device, and the sending power may determine the first distance range.

In a third aspect, the embodiments of the present application provide a communication device, including a processor; the processor is used to read and run a program from a memory, so as to implement the method in the first aspect or any possible implementation mode above, Or, to implement the method in the second aspect or any possible implementation manner.

In the fourth aspect, the embodiments of the present application provide a communication system, including a first terminal device, and the first terminal device can execute the method in the first aspect or any possible implementation manner, or, to implement the above-mentioned second Aspect or method of any possible embodiment.

In the fifth aspect, the embodiments of the present application provide a computer program product containing instructions, which, when run on a computer, cause the computer to execute the method of the first aspect or any possible implementation, or the second aspect or method of any possible implementation.

In the sixth aspect, the embodiments of the present application provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, the processor is made to perform the first aspect or any possible The method of the first embodiment, or the method of the second aspect or any possible embodiment.

Description of drawings

FIG. 1 is a schematic diagram of a network architecture of a ProSe communication system applicable to an embodiment of the present application;

FIG. 2A is a schematic diagram of a mode of discovering a target terminal device applicable to an embodiment of the present application;

FIG. 2B is a schematic diagram of another mode of discovering a target terminal device applicable to the embodiment of the present application;

FIG. 2C is a schematic diagram of an application scenario applicable to the embodiment of the present application;

FIG. 2D is a schematic diagram of a ranging method applicable to the embodiment of the present application;

FIG. 2E is a schematic diagram of an angle of arrival and angle of departure applicable to the embodiment of the present application;

FIG. 3 is a flowchart interaction diagram of a method for discovering a target terminal device according to an embodiment of the present application;

FIG. 4 is a flowchart interaction schematic diagram of another method for discovering a target terminal device according to an embodiment of the present application;

FIG. 5 is a flowchart interaction diagram of another method for discovering a target terminal device according to an embodiment of the present application;

FIG. 6 is a flowchart interaction diagram of another method for discovering a target terminal device according to an embodiment of the present application;

FIG. 7 is a flowchart interaction diagram of another method for discovering a target terminal device according to an embodiment of the present application;

FIG. 8 is a flowchart interaction diagram of another method for discovering a target terminal device according to an embodiment of the present application;

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

Fig. 10 is a schematic diagram of another communication device provided according to an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. The technical solutions of the embodiments of the present application can be applied to various communication systems, such as long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), fifth generation (5th generation, 5G) mobile communication system or new radio (new radio, NR) system, or applied to future communication systems or other similar communication systems, etc. The network architecture and business scenarios described in this application are to illustrate the technical solution of this application more clearly, and do not constitute a limitation to the technical solution provided by this application. Those of ordinary skill in the art know that with the evolution of network architecture and new business scenarios The technical solutions provided by this application are also applicable to similar technical problems.

Device-to-device communication is a method that allows multiple terminal devices to communicate directly. This communication technology allows the multiple user devices to share spectrum resources under the control of the cell network, which effectively improves the utilization of spectrum resources. . The 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) standards organization has formulated a device-to-device communication standard, and the device-to-device communication service may also be called a proximity-based service (Proximity-based Services, ProSe). ProSe includes ProSe discovery, which can be called the discovery of terminal equipment, that is, the discovery of target terminal equipment. Its purpose is to realize that the source terminal equipment supporting ProSe discovers another adjacent terminal equipment (target terminal equipment) that also supports ProSe. . Through the discovery of the target terminal device, the source terminal device and the target terminal device can communicate through the PC5 (ProSe Communication 5) interface.

Taking the fifth generation mobile communication system as an example, ProSe is implemented based on the network architecture of the communication system shown in FIG. 1 . FIG. 1 is a schematic diagram of a network architecture of a ProSe communication system. The communication system includes a ProSe application server, a core network network, a radio access network (Radio Access Network, RAN) and a terminal device.

The ProSe Application Server (ProSe Application Server) is a server used to provide application services for ProSe, and the server and the terminal device realize data intercommunication through a protocol data unit (PDU) session.

The core network network may include one or more of the following network elements: access and mobility management function (access and mobility management function, AMF) network element, session management function (session management function, SMF) network element, user plane function (user plane function, UPF) network element and 5G Direct Discovery Name Management Function (5G DDNMF, 5G Direct Discovery Name Management Function) network element, etc. Each of the above-mentioned network elements may also be called a device, equipment or entity, and this application is not limited here. For example, a 5G direct connection discovery name management function network element may also be called a 5G DDNMF device, a 5G DDNMF device or a 5G DDNMF entity. For the convenience of the following description, the method of abbreviation will be used. For example, "5G direct connection discovery name management function network element" is referred to as "5G DDNMF" for short, and the same applies to other network elements.

AMF is used to be responsible for the mobility management of terminal equipment. For example, mobility management includes mobility status management, assigning temporary user IDs, authenticating and authorizing users, and so on.

SMF is used to be responsible for UPF selection, reselection, network protocol (internet protocol, IP) address allocation, PDU session establishment, modification or release, quality of service (quality of service, QoS) control, etc.

UPF is used for detection, routing and forwarding of packet data packets. For example, UPF can be used as an uplink classifier (uplink classifier, ULCL) to support the distribution of traffic before forwarding to the data network, or, UPF can be used as a branching point (branching point, BP) to support multi-homed (multi-homed) PDUs session.

5G DDNMF is used for ProSe discovery and assigns discovery parameters for ProSe-supporting terminal devices. Usually, operators will deploy a 5G DDNMF in a public land mobile network (PLMN). The 5G DDNMF interacts with the ProSe application server through the PC2 (ProSe Communication 2) interface, which is used for the 5G DDNMF to obtain the ProSe discovery authorization information from the ProSe application server. 5G DDNMF interacts with terminal equipment through the PC3 (ProSe Communication 3) interface, which is used for terminal equipment to obtain ProSe discovery parameters from 5G DDNMF.

Each of the above-mentioned network elements may be realized by specified hardware, or may also be realized by a software instance on specified hardware, or may also be realized by a virtual function instantiated on a suitable platform, and the above-mentioned network elements are both They can be combined or set separately, and the present invention is not limited here.

The RAN is used to implement radio-related functions. Nodes in the RAN can also be called access network devices or base stations, and are used to connect terminal devices to wireless networks. The access network device may be a base station (base station), an evolved base station (evolved NodeB, eNodeB) in an LTE system or an evolved LTE system (LTE-Advanced, LTE-A), or a next-generation base station in a 5G communication system (next generation NodeB, gNB), transmission reception point (transmission reception point, TRP), base band unit (base band unit, BBU), WiFi access point (access point, AP), base station or WiFi system in the future mobile communication system Access nodes in etc. The radio access network device may also be a module or unit that completes some functions of the base station, for example, it may be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU). The embodiment of the present application does not limit the specific technology and specific equipment form adopted by the radio access network equipment. For example, in a network structure, the radio access network device may be a CU node, or a DU node, or an access network device including a CU node and a DU node. Specifically, the CU node is used to support radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP), service data adaptation protocol (service data adaptation protocol, SDAP) and other protocols; the DU node It is used to support radio link control (radio link control, RLC) layer protocol, medium access control (medium access control, MAC) layer protocol and physical layer protocol.

A terminal device is a device with a wireless transceiver function. The terminal device is connected to the access network device in a wireless manner, so as to be connected to the communication system. A terminal device may also be called a terminal, a user equipment (user equipment, UE), a mobile station, a mobile terminal, and the like. Terminal devices can be mobile phones, tablet computers, computers with wireless transceiver functions, virtual reality terminal devices, augmented reality terminal devices, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in remote surgery, smart grids wireless terminals in transportation security, wireless terminals in smart cities, or wireless terminals in smart homes, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device. As an example but not a limitation, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc., which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring. The terminal device can also be an on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units, and the vehicle can A unit may implement the methods of the present application.

Currently, the method for discovering a target terminal device can be implemented using the modes shown in FIG. 2A and FIG. 2B .

FIG. 2A is a schematic diagram of a mode for discovering a target terminal device. As shown in FIG. 2A, the mode includes the following steps:

In step 201a, terminal device 1 (Discoverer UE) sends a discovery message. For example, the discovery message is a Solicitation message. Correspondingly, terminal device 2 and terminal device 3 (Discoveree UE) monitor and receive discovery messages.

The discovery message is a broadcast message, and the message is an omnidirectional message, that is, terminal devices in all directions around the terminal device 1 can receive the discovery message.

The discovery message may include a message type (for example, Solicitation), a destination layer 2 identifier (Destination Layer 2 ID), a source layer 2 identifier (Source Layer 2 ID), a user information identifier (User Info ID), and discovery parameters. In the discovery message, the destination layer 2 identifier is the broadcast address, the source layer 2 identifier is the layer 2 identifier of the terminal device 1, the user information identifier is the identifier of the terminal device 1, and the identifier of the terminal device 1 may be the identifier of the terminal device 1. Application layer identification, the discovery parameter includes ProSe application identification (ProSe Application ID) or ProSe query code word (ProSe Query Code). It should be noted that the ProSe query codeword is the ProSe query codeword corresponding to the target terminal device, and before step 201a, the terminal device 1 obtains the ProSe query codeword corresponding to the target terminal device from the 5G DDNMF.

In step 202a, terminal device 2 and terminal device 3 send a response message to terminal device 1, where the response message is used to respond to the discovery message. The response message may include message type (for example, Response), destination layer 2 identifier, source layer 2 identifier, user information identifier, and discovery parameters. In the response message, the destination layer 2 identifier is the source layer 2 identifier in the discovery message in step 201, the source layer 2 identifier is the destination layer 2 identifier in the discovery message in step 201, and the user information identifier is the terminal device sending the response message identification, such as the application layer identification of the terminal device 3, the discovery parameter includes a ProSe application identification (ProSe Application ID) or a ProSe response codeword (ProSe

Response Code).

It should be noted that when the discovery parameter in the discovery message is the ProSe application identifier, any terminal device interested in the ProSe application identifier in the discovery parameter can send a response message through step 202 . And when the discovery parameter in the discovery message is a ProSe query codeword, only a specific terminal device will send a response message to terminal device 1 because only a specific terminal device has a ProSe response code corresponding to the same ProSe query codeword. The response message includes the ProSe response codeword corresponding to the ProSe query codeword. In other words, when the discovery parameter is the ProSe query codeword, only a specific terminal device can discover each other with terminal device 1 and perform subsequent ProSe communication.

The method shown in FIG. 2A can be understood as that terminal device 1 actively sends a discovery message to find a target terminal device. When the parameter is discovered, a response message is sent to terminal device 1.

FIG. 2B is a schematic diagram of another mode for discovering a target terminal device. As shown in FIG. 2B, this mode includes the following steps:

In step 201b, terminal device 1 (Announcing UE) sends a discovery message. For example, the discovery message is an announcement message (Announcement message). Correspondingly, at least one of the terminal device 2 or the terminal device 3 (Monitoring UE) monitors and receives the discovery message.

The discovery message may include message type (ie Announcement), destination layer 2 identifier, source layer 2 identifier, user information identifier and discovery parameters. For example, the discovery parameter may include a ProSe application identifier or a ProSe restricted codeword (ProSe Restricted Code). Similarly, the ProSe restricted codeword is a codeword corresponding to the terminal device 1, and before step 201b, the terminal device 1 obtains the ProSe restricted codeword from the 5G DDNMF.

Subsequently, when at least one of the terminal device 2 or the terminal device 3 is interested in the discovery parameter in the discovery message (can be matched with the discovery parameter, such as the ProSe application identifier), it can initiate a connection establishment request to the terminal device 1.

The method shown in FIG. 2B can be understood as that the terminal device 1 sends a discovery message to at least one of the surrounding terminal devices 2 or 3, and informs at least one of the terminal device 2 or the terminal device 3 that the terminal device 1 wants to initiate For a discovery request, a terminal device that can match the discovery parameter in the discovery message is requested to initiate a connection establishment request to terminal device 1 in a subsequent time.

Taking the method shown in FIG. 2A above as an example, in the actual implementation process, the discovery message is generated by the ProSe layer (ProSe layer) of the terminal device 1 and sent to the access layer (Access Stratum layer, AS layer) of the terminal device 1. ), the ProSe layer of the terminal device 1 also sends the source layer 2 identifier and the destination layer 2 identifier for sending the discovery message to the AS layer of the terminal device 1. The respective AS layers of the terminal device 2 and the terminal device 3 receive the discovery message, and send the discovery message to the ProSe layer of the respective terminal devices. Similarly, the response messages are also generated by the respective ProSe layers of the terminal device 2 and the terminal device 3 and sent to the respective AS layers, and the respective AS layers send the response messages to the terminal device 1 .

However, in the above process, when the parameter is found to be the ProSe application identifier, terminal device 1 may receive at least two response messages. If terminal device 1 has specific requirements, take the museum scene as an example, as shown in Figure 2C , when terminal device 1 wants to discover the terminal device attached to a specific exhibit, but terminal device 1 does not know the identification information of the terminal device attached to the specific exhibit, if terminal device 2 is attached to a specific exhibit , terminal device 1 does not know that terminal device 2 is attached to a specific exhibit, that is, terminal device 1 does not know the identification information of terminal device 2, and terminal device 2 sends the discovery parameter ( The discovery parameter is interested in the ProSe application identifier), and the terminal device 1 and the terminal device 2 can realize the discovery of the target terminal device by means of the discovery parameter, that is, according to the mode of FIG. 2A, the terminal device 2 sends a response message to the terminal device 1, or According to the mode in FIG. 2B , terminal device 2 initiates a connection establishment request to terminal device 1 . However, terminal device 3 and terminal device 4 are also interested in the discovery parameters in the discovery message sent by terminal device 1, and terminal device 1 can also receive messages from terminal device 3 and terminal device 4. At this time, terminal device 1 cannot distinguish the terminal Which terminal device among device 2, terminal device 3, and terminal device 4 is the terminal device attached to a specific exhibit, that is, the target terminal device cannot be identified as terminal device 2, and the target terminal device cannot be discovered, so it cannot Meet the needs of users.

The problem to be solved in this application is how to realize the discovery of a specific target terminal device when the terminal device cannot obtain the identification information of the target terminal device in advance. Taking the above example as an example, the present application aims to provide a solution so that the terminal device 1 can discover the target terminal device (terminal device 2) in a scenario similar to the above.

In order to make the solution of the present application clearer and easier to understand, before introducing the embodiments provided in the present application, first introduce the two methods involved in the present application.

1. How to measure distance

Measuring the distance may also be referred to as ranging, and for convenience, the measuring distance will be simply referred to as ranging in the following.

The principle of the communication-based ranging method is to calculate the transmission time of electromagnetic waves of two terminal devices, that is, Time of Flight (TOF), and multiply the TOF by the propagation speed of electromagnetic waves in the medium to obtain two Distance between end devices. In actual operation, since the medium is air or vacuum, the speed is generally calculated according to the speed of light.

As shown in FIG. 2D , the terminal device 1 is an initiating terminal device, and the terminal device 1 sends the ranging information, and records the time T1 at which the ranging information is sent. The terminal device 2 is a feedback terminal device, and the terminal device 2 receives the ranging information, and records the time T3 of receiving the ranging information. After receiving the ranging information, terminal device 2 starts sending feedback information to terminal device 1, and records the start time T4, and the terminal device calculates the time difference between T4 and T3, which is Treply in the figure, and the time difference is used as feedback part of the information. Wherein, the time difference between the initiated action and the sent action is negligible. Terminal device 1 records time T2 when receiving feedback information from terminal device 2, and calculates the time difference between T2 and T1, that is, Tround in the figure, then the terminal device can calculate TOF by the following formula:

TOF＝(Tround-Treply)/2

Then terminal device 1 can calculate the distance between terminal device 1 and terminal device 2 according to the TOF by the following formula:

Distance=TOF*V, where V can be the speed of light

From another perspective, the TOF can be regarded as the average time for one-way transmission of messages between two terminal devices.

2. Method of measuring angle

The communication-based method for measuring an angle between terminal devices may include a method for measuring an angle of arrival (Angle of Arrival, AoA) and a method for measuring an angle of departure (Angel of Departure, AoD).

As shown in FIG. 2E , the left figure (a) in FIG. 2E is a schematic diagram of a departure angle, which is the angle between the direction in which terminal device 1 sends a message to terminal device 2 and the reference direction of terminal device 1 .

The right figure (b) in FIG. 2E is a schematic diagram of the angle of arrival, which is the angle between the direction in which the terminal device 1 receives the message from the terminal device 2 and the reference direction of the terminal device 1 .

Through the angle of departure or angle of arrival, the terminal device 1 can determine the direction of the terminal device 2 relative to the terminal device 1, so the method of measuring angles can help the terminal device 1 determine the relative angle of the terminal device 2 relative to the terminal device 1.

Through the above two different methods, the terminal device 1 can determine the position information of the terminal device 2 relative to the terminal device 1 through at least one of distance information or angle information.

Fig. 3 is a schematic flow diagram of a method for discovering a target terminal device according to an embodiment of the present application. Terminal device 1 in the above example may be the source terminal device in FIG. 3 , and terminal device 2 may be the target terminal device in FIG. 3 .

For example, this method includes the following steps:

Step 301, the application layer (application layer, APP layer) of the source terminal device sends demand information to the ProSe layer of the source terminal device.

The requirement information includes direction information, and the requirement information is used to discover the target terminal device.

For example, the direction information may be angle information, wherein the angle information may be a departure angle. The direction information is used to instruct the source terminal device to send a message to a specific angle based on the reference direction. From another perspective, the direction information is used to indicate the direction of the target terminal device relative to the source terminal device. When the source terminal device follows the If the direction information sends a message, only the terminal device in the direction indicated by the direction information can receive the message.

Optionally, in another possible implementation manner, the requirement information may be generated for the ProSe layer of the source terminal device. For example, the ProSe layer of the source terminal device can generate the demand information according to the user's settings.

Step 302, the ProSe layer of the source terminal device sends a discovery message and requirement information to the AS layer of the source terminal device.

For example, the ProSe layer of the source terminal device generates a discovery message, which may include a message type (for example, Solicitation) and a discovery parameter. The discovery parameter includes a ProSe application ID (ProSe Application ID). The ProSe application identifier can be obtained from the 5G DDNMF network element, or it can be obtained from the application layer of the source terminal device. Optionally, the discovery message may also include identification information of the source terminal device, where the identification information of the source terminal device may be application layer identification information of the source terminal device, and the application layer identification information is the ProSe application identification identified In a certain type of application, identify the identification information of a certain terminal device. For example, the ProSe application identification is used to identify a certain type of chat software, and the application identification information is used to identify the identification of the terminal device in this type of chat software.

The ProSe layer of the source terminal device also determines the destination layer 2 identifier (Destination Layer 2 ID) and the source layer 2 identifier (Source Layer 2 ID) for sending the discovery message. The destination layer 2 identifier is the broadcast address, and the source layer 2 identifier is the layer 2 identifier of the source terminal device. For example, the ProSe layer of the source terminal device determines the target layer 2 identifier used for sending the discovery message according to the network configuration information. For example, the source terminal device obtains the network configuration information from the policy control function network element (not shown in the figure), the network configuration information includes the correspondence between the ProSe application identifier and the destination layer 2 identifier, and may also include the application identifier information and the destination layer 2 identifier. 2 identification, or the corresponding relationship between the message type and the destination layer 2 identification. The message type may be a directional discovery message, a ranging message, or other types of discovery messages, which are not limited in this document. . For example, the ProSe layer of the source terminal device sends the destination layer 2 identifier and the source layer 2 identifier used for sending the discovery message to the AS layer of the source terminal device.

In a possible implementation, the discovery message can be replaced by a ranging message or a directional discovery message, that is, the ProSe layer of the source terminal device sends a ranging message to the AS layer of the source terminal device or directed discovery messages. The information included in the ranging message or the orientation discovery message may be the same as the information included in the above discovery message.

Step 303, the AS layer of the source terminal device sets angle information.

For example, the AS layer of the source terminal device determines the angle (for example, the departure angle) used to send the discovery message in step 302 according to the direction information in the demand information, that is, the AS layer of the source terminal device sets the source terminal device for subsequent message sending angle information. Specifically, the angle is an angle at which the transmitting antenna of the source terminal device transmits signals.

Step 304, the source terminal device sends a discovery message. Correspondingly, the target terminal device receives the discovery message.

For example, the AS layer of the source terminal device uses the destination layer 2 identifier and the source layer 2 identifier received from the ProSe layer of the source terminal device to send a discovery message.

For example, the AS layer of the source terminal device sends the discovery message according to the settings in step 303 . In other words, only the terminal devices in the direction indicated by the angle information can receive the discovery message.

If the message sent by the ProSe layer of the source terminal device to the AS layer of the source terminal device in step 302 is a ranging message, then the AS layer of the source terminal device sends the ranging message in this step. Similarly, if the message sent by the ProSe layer of the source terminal device to the AS layer of the source terminal device in step 302 is a directed discovery message, then in this step the AS layer of the source terminal device sends a directed discovery message.

Step 305, the target terminal device sends a response message. Correspondingly, the source terminal device receives the response message.

For example, the AS layer of the source terminal device receives the response message.

For example, the ProSe layer of the target terminal device sends a response message to the AS layer of the target terminal device, and the AS layer of the target terminal device sends a response message.

For example, the target terminal device also determines a destination layer 2 identity and a source layer 2 identity for sending the response message. The destination layer 2 identifier is the source layer 2 identifier of the received discovery message, and the source layer 2 identifier is the identifier information assigned by the target terminal device itself.

The response message is the response message of the discovery message in step 304 or the PC5 connection establishment request message for the target terminal device. When there is a terminal device in the direction corresponding to the angle information, there may be one response message. If there are multiple terminals device, the response message may be multiple. The foregoing description is also applicable to other embodiments in the present application, and details are not repeated here.

In addition, the response message also includes other information, for example, identification information of the target terminal device, where the identification information of the target terminal device may be application layer identification information of the target terminal device.

Step 306, the AS layer of the source terminal device sends a response message to the ProSe layer of the source terminal device.

The response message is the response message received in step 305 .

Step 307, the ProSe layer of the source terminal device determines the response message of the target terminal device.

It should be understood that the response message received by the ProSe layer of the source terminal device through step 306 is the response message of the target terminal device.

Finally, the source terminal device obtains the identification information of the target terminal device according to the response message of the target terminal device.

In step 308, the source terminal device establishes a PC5 connection with the target terminal device.

It should be noted that if there is only one target terminal device, when the response message of the target terminal device determined by the ProSe layer of the source terminal device is the response message of multiple target terminal devices through the above steps, the source terminal device can The information of each target terminal device is provided to the user through a visual interface, and the source terminal device determines the target terminal device according to the user's selection.

It should be noted that in this embodiment, in a possible implementation manner, the source terminal device can calculate the arrival angle of the received response message, and compare the arrival angle with the angle information. When the arrival angle of the response message The error with the angle information is within a certain range, which depends on the specific implementation and is not limited in this application, then in step 306, the AS layer of the source terminal device sends the response message to the ProSe layer of the source terminal device. This implementation manner serves as a check, and is used to further ensure that the response message received by the ProSe layer of the source terminal device is the response message of the target terminal device. For this implementation, reference may be made to the description of step 605 in FIG. 6 .

In addition, the ProSe layer of the source terminal device in this embodiment can be replaced by a ranging layer (Ranging layer), or a discovery layer (Discovery layer), or a layer with another name with the same or similar function. When the source terminal When the ProSe layer of the device is a layer with a different name, some message names in this embodiment may be changed accordingly. For example, the discovery message may be a directional discovery message or a ranging message. It is not limited in this application, and the other embodiments are the same, and will not be repeated here.

Through the method shown in the embodiment shown in Fig. 3, the source terminal device can obtain the demand information without knowing the identity of the target terminal, set the direction (angle) for sending the discovery message according to the demand information, and follow the direction Send the discovery message. The terminal device that receives the discovery message is the target terminal device. The target terminal device sends a response message to the source terminal device, and the source terminal device then obtains the response message of the target terminal device, and finally obtains the identity of the target terminal device from the response message of the target terminal device, thereby realizing the discovery of the target terminal device .

Fig. 4 is a schematic flow diagram of a method for discovering a target terminal device according to an embodiment of the present application. Terminal device 1 in the above example may be the source terminal device in FIG. 4 , and terminal device 2 may be the target terminal device in FIG. 4 .

For example, this method includes the following steps:

Step 401, the application layer of the source terminal device sends requirement information to the ProSe layer of the source terminal device.

The requirement information includes power information, and the requirement information is used to discover the target terminal device.

For example, the power information is used to indicate the transmit power of the transmit antenna of the source terminal device, that is, the target terminal device is within the signal coverage of the source terminal device. Alternatively, the power information may also be used to limit the number of terminal devices that receive the message sent by the source terminal device, so as to reduce the cost of subsequently screening out target terminal devices.

Optionally, in another possible implementation manner, the requirement information may be generated for the ProSe layer of the source terminal device. For example, the ProSe layer of the source terminal device can generate the demand information according to the user's setting.

Step 402, the ProSe layer of the source terminal device sends a discovery message and requirement information to the AS layer of the source terminal device.

For this step, reference may be made to the description of step 302 .

Step 403, the AS layer of the source terminal device sets the transmission power.

For example, the AS layer of the source terminal device determines the transmission power of the transmitting antenna used to send the discovery message in step 402 according to the power information in the demand information, that is, the AS layer of the source terminal device sets the transmission power of the source terminal device for subsequent sending messages. power.

Step 404, the source terminal device sends a discovery message. Correspondingly, the target terminal device receives the discovery message.

For example, the AS layer of the source terminal device sends the discovery message according to the settings in step 403 . In other words, only the terminal devices within the signal coverage indicated by the transmission power of the source terminal device can receive the discovery message.

If the discovery message sent by the ProSe layer of the source terminal device to the AS layer of the source terminal device in step 402 is a ranging message, then the AS layer of the source terminal device sends the ranging message in this step. Similarly, if the discovery message sent by the ProSe layer of the source terminal device to the AS layer of the source terminal device in step 402 is a directional discovery message, then in this step the AS layer of the source terminal device sends a directional discovery message.

Step 405, the target terminal device sends a response message. Correspondingly, the source terminal device receives the response message.

Step 406, the AS layer of the source terminal device sends a response message to the ProSe layer of the source terminal device.

Step 407, the ProSe layer of the source terminal device determines the response message of the target terminal device.

In step 408, the source terminal device establishes a PC5 connection with the target terminal device.

For steps 405 to 408, reference may be made to the description of steps 305 to 308 in FIG. 3 .

Through the method shown in the embodiment shown in Figure 4, the source terminal device can obtain the demand information without knowing the identity of the target terminal, set the transmission power for sending the discovery message according to the demand information, and send the message according to the transmission power. The discovery message. The terminal device that receives the discovery message is the target terminal device. The target terminal device sends a response message to the source terminal device, and the source terminal device then obtains the response message of the target terminal device, and finally obtains the identity of the target terminal device from the response message of the target terminal device, thereby realizing the discovery of the target terminal device .

FIG. 5 is a flowchart interaction diagram of another method for discovering a target terminal device according to an embodiment of the present application. Terminal device 1 in the above example may be the source terminal device in FIG. 5 , and terminal device 2 may be the target terminal device in FIG. 5 .

For example, this method includes the following steps:

Step 501, the application layer of the source terminal device sends requirement information to the ProSe layer of the source terminal device.

The requirement information includes distance information, and the requirement information is used to discover the target terminal device.

The distance information is used to indicate the distance between the source terminal device and the target terminal device. For example, the distance information includes a distance requirement, which can be a specific value or a range of values, which is not limited in this application . For example, the distance requirement is 5 meters. In addition, the distance information is also used to instruct the source terminal device to perform distance calculation.

Optionally, in another possible implementation manner, the requirement information may be generated by the ProSe layer of the source terminal device. For example, the ProSe layer of the source terminal device can generate the demand information according to the user's setting.

Step 502, the ProSe layer of the source terminal device sends a discovery message and requirement information to the AS layer of the source terminal device.

For the discovery message, reference may be made to the description in step 302, which will not be repeated here.

The demand information is the demand information in step 501 .

In a possible implementation manner, the distance requirement may not be included in this step, but the ProSe layer of the source terminal device also sends information indicating to acquire distance measurement information to the AS layer of the source terminal device.

In a possible implementation manner, the discovery message may be replaced by a ranging message or a directional discovery message, that is, the ProSe layer of the source terminal device sends a ranging message or a directional discovery message to the AS layer of the source terminal device. The information included in the ranging message or the directional discovery message may be the same as that included in the discovery message. Since the distance measurement information or the orientation discovery message can implicitly indicate the measurement of the distance, if the requirement information in step 501 includes the distance requirement, the distance requirement of the requirement information in this step or the information used to indicate the acquisition of the distance measurement information is available. select.

Step 503, the source terminal device sends a discovery message.

Correspondingly, the target terminal device or other terminal devices receive the discovery message. It should be noted that the "target terminal device or other terminal devices" is intended to indicate that there may be one terminal device or multiple terminal devices receiving the discovery message.

For example, the AS layer of the source terminal device sends a discovery message. The discovery message is an omni message.

Since the AS layer of the source terminal device has learned from the ProSe layer of the source terminal device that it needs to obtain measurement information, for example, the AS layer of the source terminal device receives the distance information in the demand information from the ProSe layer of the source terminal device, or is used to indicate the acquisition For distance measurement information, the AS layer of the source terminal device records the time point at which the discovery message is sent. For example, the AS layer of the source terminal device records the source layer 2 identifier in the discovery message and the corresponding time point when the discovery message is sent.

If the message sent by the ProSe layer of the source terminal device to the AS layer of the source terminal device in step 502 is a ranging message, then the AS layer of the source terminal device sends the ranging message in this step. Similarly, if the message sent by the ProSe layer of the source terminal device to the AS layer of the source terminal device in step 502 is a directional discovery message, then in this step the AS layer of the source terminal device sends a directional discovery message.

Optionally, the AS layer of the source terminal device determines the AS layer configuration information used for sending the discovery message. The AS layer configuration information includes logical channel (logical channel) information or physical layer resource pool information. For example, the source terminal device acquires the AS layer configuration information used for sending the discovery message from the policy control function network element, or the source terminal device receives the AS layer configuration information used for sending the message from the RAN.

Optionally, the AS layer of the source terminal device also sends indication information in this step, and the indication information is used to instruct the target terminal device or other terminal devices to carry the time information of Treply in the response message fed back subsequently.

Step 504, the target terminal device or other terminal devices send a response message. Correspondingly, the source terminal device receives the response message.

The response message is a response message to the discovery message in step 503 .

The target terminal device or other terminal devices are terminal devices that are interested in the discovery parameters in the discovery message. For example, taking the target terminal device as an example, the ProSe layer of the target terminal device sends a response message to the AS layer of the target terminal device, and the AS layer of the target terminal device sends a response message.

Optionally, taking the target terminal device as an example, the target terminal device also determines the destination layer 2 identifier and the source layer 2 identifier for sending the response message. The destination layer 2 identifier is the source layer 2 identifier of the received discovery message, and the source layer 2 identifier is the identification information assigned by the target terminal device or other terminal devices. The same applies to other terminal devices.

The response message may be a response message to the discovery message in step 503 or a PC5 connection establishment request message.

Wherein, the response message carries Treply, and Treply indicates the time difference between the terminal device receiving the discovery message and sending the response message of the discovery message, or indicates that the AS layer of the terminal device receives the discovery message and sends the AS layer of the terminal device. The time difference of the response message of this discovery message. For example, the terminal device that receives the discovery message, that is, the target terminal device or other terminal devices, calculates the Treply according to the method shown in Figure 2D, and sends the Treply to the AS layer of the source terminal device, so that the AS layer of the source terminal device The Treply can be obtained while receiving the response message. Specifically, taking the target terminal device as an example, the AS layer of the target terminal device records the first time point of receiving the discovery message, stores the correspondence between the source layer 2 identifier in the discovery message and the first time point, and the AS layer of the target terminal device Receive the source layer 2 identifier in the discovery message from the ProSe layer of the target terminal device as the destination layer 2 identifier of the response message, determine the second time point for sending the response message, and use the difference between the second time point and the first time point as Treply.

Optionally, the target terminal device or other terminal devices that receive the discovery message determine that Treply needs to be calculated according to at least one of the following information: the destination layer 2 identifier used to send the discovery message, the logical channel information used to send the discovery message, and the Information about the physical resource pool used by the discovery message. For example, the destination layer 2 identifier used for sending the discovery message is a layer 2 identifier obtained by the source terminal device from the core network. Correspondingly, the terminal device (target terminal device or other terminal device) obtains the same The layer 2 identifier of , where the layer 2 identifier can be used to instruct the terminal device (the target terminal device or other terminal devices) to calculate the Treply.

For example, taking the target terminal device as an example, the target terminal device obtains the network configuration information from the policy control function network element, and the network configuration information may include the correspondence between the message type and the destination layer 2 identifier of the received message, and the message type may be It may be a directional discovery message, a ranging message, or other types of discovery messages, which are not limited herein. For example, the target terminal device receives the ranging message, and the target terminal device determines that it needs to calculate Treply according to the corresponding relationship.

Similar to the source terminal device, the target terminal device may also receive at least one of logical channel information and physical resource pool information for receiving a directional discovery message or a ranging message from the RAN. Taking the target terminal device as an example, when the target terminal device records the received The time point of the discovery message in step 503, that is, the first time point, is used to calculate Treply.

In addition, the response message may also include other information, for example, identification information of the target terminal device, such as application layer identification information of the target terminal device.

Step 505, the AS layer of the source terminal device calculates the distance value or TOF.

For example, the AS layer of the source terminal device records the time point of receiving the response message. For example, the AS layer of the source terminal device records the time point of receiving the response message according to the destination layer 2 identifier in the response message, and records the source layer 2 identifier recorded in step 503 and the corresponding sender of the discovery message. At the time point, Tround is calculated, and then the value of TOF is calculated according to the aforementioned method. It can be understood that the terminal device identified by the destination layer 2 identifier in the response message and the source layer 2 identifier in the discovery message is both the source terminal device, so the AS layer of the source terminal device 2. Identify and establish the relationship between the discovery message and the response message, so as to calculate the value of TOF according to the aforementioned method.

The AS layer of the source terminal device can further obtain the distance value according to the TOF value, and the distance value is the actual distance between the terminal device (the target terminal device and one of other terminal devices) that sends the response message and the source terminal device, which will not be discussed below repeat.

It can be understood that if the response message is multiple messages, that is, response messages fed back by multiple terminal devices, the distance value or TOF is obtained for different terminal device response messages corresponding to the message.

Step 506, the source terminal device determines the response message of the target terminal device.

In a possible implementation, the AS layer of the source terminal device sends a response message and the distance measurement information (distance value or TOF) corresponding to the response message to the ProSe layer of the source terminal device, that is, if the AS layer of the source terminal device calculates distance value, then the measurement information is the distance value, otherwise it is TOF). In the case of multiple response messages, the AS layer of the source terminal device sends each message and its corresponding distance measurement information to the ProSe layer of the source terminal device. The ProSe layer of the source terminal device determines the response message of the target terminal device. It should be understood that the ProSe layer of the source terminal device screens out the response message of the target terminal device from one or more response messages. For example, the response message sent by the AS layer of the source terminal device to the ProSe layer of the source terminal device is the response message received in step 505, or the response message is a message in which Treply is removed from the response message received in step 505. For example, when the ProSe layer of the source terminal device does not send distance requirements to the AS layer of the source terminal device in step 502, but the ProSe layer of the source terminal device sends information indicating to obtain distance measurement information to the AS layer of the source terminal device, this step can be Take this possible implementation.

Specifically, for example, if the ProSe layer of the source terminal device receives the distance value corresponding to the response message, the ProSe layer of the source terminal device compares the distance value with the distance requirement, and filters out the response message of the target terminal device from the response message . For example, if the distance requirement is 5 meters, the ProSe layer of the source terminal device screens out the response messages of the terminal devices whose distance measurement information is 5 meters ± the allowable error range, and the screened out response messages are the response messages of the target terminal device. The allowable error range depends on the actual implementation. The allowable error range can be set by the user, built in the source terminal device, or obtained by the source terminal device through other channels, which is not limited in this article. For another example, the ProSe layer of the source terminal device receives the TOF corresponding to the response message, the ProSe layer of the source terminal device calculates the distance value according to the TOF, and then screens out the response message of the target terminal device according to the above method.

In a possible implementation manner, the AS layer of the source terminal device determines the response message of the target terminal device.

Specifically, if the AS layer of the source terminal device calculates the TOF corresponding to the corresponding message in step 505, then the AS layer of the source terminal device calculates the distance value according to the TOF. The AS layer of the source terminal device compares the distance value with the distance requirement, and screens out the response message of the target terminal device from the response message. For the screening method, reference may be made to the description of the ProSe layer screening method of the source terminal device above. This implementation manner can reduce the content of interaction between the AS layer of the source terminal device and the ProSe layer of the source terminal device.

For example, after the AS layer of the source terminal device determines the response message of the target terminal device, the response message of the target terminal device is sent to the ProSe layer of the source terminal device.

Finally, the source terminal device obtains the identification information of the target terminal device according to the response message of the target terminal device. For example, the ProSe layer of the source terminal device obtains the identification information of the target terminal device according to the response message of the target terminal device.

In step 507, the source terminal device establishes a PC5 connection with the target terminal device.

Subsequently, the source terminal device can obtain other information of the target terminal device.

Through the method shown in the embodiment shown in Figure 5, the source terminal device can obtain distance requirement information without knowing the identity of the target terminal, and by comparing the distance requirement information and the received terminal device with the source terminal The distance value between the devices screens out the response message of the target terminal device, and finally obtains the identification information of the target terminal device from the response message of the target terminal device, thereby realizing the discovery of the target terminal device.

FIG. 6 is a flowchart interaction diagram of another method for discovering a target terminal device according to an embodiment of the present application. Terminal device 1 in the above example may be the source terminal device in FIG. 6 , and terminal device 2 may be the target terminal device in FIG. 6 .

For example, this method includes the following steps:

In step 601, the application layer of the source terminal device sends requirement information to the ProSe layer of the source terminal device.

The demand information includes direction information, and the direction information includes angle information. The angle information is used to indicate an angle value of an arrival angle of a message received from a target terminal device. The direction information is used to indicate the direction between the source terminal device and the target terminal device.

Optionally, the requirement information may be generated by the ProSe layer of the source terminal device. In an optional implementation manner, the ProSe layer of the source terminal device may generate the requirement information according to user settings.

Step 602, the ProSe layer of the source terminal device sends a discovery message and requirement information to the AS layer of the source terminal device.

Wherein, for the discovery message, reference may be made to the description of step 302 in FIG. 3 . The demand information is the demand information in step 601 .

Step 603, the source terminal device sends a discovery message.

Step 604, the target terminal device or other terminal devices send a response message. Correspondingly, the source terminal device receives the response message.

The response message is a response message to the discovery message in step 603 .

The target terminal device or other terminal devices are terminal devices interested in the discovery parameters in the discovery message. For example, taking the target terminal device as an example, the ProSe layer of the target terminal device sends a response message to the AS layer of the target terminal device, and the AS layer of the target terminal device sends a response message.

Step 605, the AS layer of the source terminal device calculates the angle of arrival.

The AS layer of the source terminal device calculates the angle of arrival corresponding to the response message in step 604 . It can be understood that when there are multiple response messages, there are multiple angles of arrival.

Step 606, the source terminal device determines the response message of the target terminal device.

In a possible implementation manner, the AS layer of the source terminal device sends a response message and the angle of arrival corresponding to the response message to the ProSe layer of the source terminal device. The ProSe layer of the source terminal device determines the response message of the target terminal device according to the angle of arrival and the direction information in the demand information.

In a possible implementation manner, the AS layer of the source terminal device determines the response message of the target terminal device. This implementation manner can reduce the content of interaction between the AS layer of the source terminal device and the ProSe layer of the source terminal device.

For a specific implementation manner of this step, reference may be made to the description in step 506 in FIG. 5 .

Finally, the source terminal device obtains the identification information of the target terminal device according to the response message of the target terminal device. For example, the ProSe layer of the source terminal device obtains the response message of the target terminal device, and the response message of the target terminal device includes the identity of the target terminal device, and the ProSe layer of the source terminal device can obtain the target terminal device's logo.

In step 608, the source terminal device completes the PC5 connection establishment with the target terminal device.

Through the method shown in the embodiment shown in FIG. 6, the source terminal device can obtain direction information without knowing the identity of the target terminal, and compare the direction information with the received terminal device and the source terminal device. The angle (arrival angle) between them, screen out the response message of the target terminal device, and finally obtain the identification information of the target terminal device from the response message of the target terminal device, thereby realizing the discovery of the target terminal device.

It should be noted that in different application scenarios, the methods shown in FIG. 3 to FIG. 6 can be used in combination.

For example, when the demand information is direction information and power information, the methods shown in Figure 3 and Figure 4 can be used in combination, that is, the AS layer of the source terminal device in Figure 3 and Figure 4 sets the angle information and transmission power according to the demand information, and the source The response message received by the terminal device is the response message of the target terminal device, and finally the identification information of the target terminal device is obtained from the response message of the target terminal device.

For example, when the demand information is direction information and distance information, a possible combination method, the methods shown in Figure 3 and Figure 5 can be used in combination, the AS layer of the source terminal device sets the angle information according to the demand information, and according to the setting Send a discovery message, the AS layer of the source terminal device calculates the TOF or distance value, and finally through the method of step 506, the source terminal device filters out the response message of the target terminal device, and finally obtains the target terminal from the response message of the target terminal device Identification information for the device. Another possible combination, the methods shown in Figure 5 and Figure 6 can be used in combination, the AS layer of the source terminal device calculates the TOF or distance value, and calculates the angle of arrival, by comparing the direction information in the demand information with the angle of arrival , and, comparing the distance information with the TOF, or comparing the distance information with the distance value, the source terminal device filters out the response message of the target terminal device, and finally obtains the identification information of the target terminal device from the response message of the target terminal device.

For example, when the demand information is power information and distance information, the methods shown in Figure 4 and Figure 5 can be used in combination, the AS layer of the source terminal device sets the transmission power according to the demand information, and sends a discovery message according to the setting, the source terminal device The AS layer calculates the TOF or distance value, finally through the method of step 506, the source terminal device screens out the response message of the target terminal device, and finally obtains the identification information of the target terminal device from the response message of the target terminal device.

FIG. 7 is a schematic flowchart of another method for discovering a target terminal device according to an embodiment of the present application. The schematic diagram will be described in conjunction with FIGS. 3 to 6 . The first terminal device in this embodiment may be the source terminal device in Figures 3 to 6, the access layer of the first terminal device may be the AS layer of the source terminal device in Figures 3 to 6, and the first terminal device The service layer based on the neighbor in Figure 3 to Figure 6 may be the ProSe layer of the source terminal device in Figure 3 to Figure 6, and one or more second terminal devices in this embodiment may be the target terminal device or other terminals in Figure 3 to Figure 6 A collective name for the device.

For example, the method includes the steps of:

Step 701, the first terminal device sends a first message to the first area.

For this step, reference may be made to the description of step 303 and step 304 in FIG. 3 , or the description of step 403 and step 404 in FIG. 4 .

The first area satisfies at least one of the following: the first area is located in a first direction of the first terminal device, or, the distance between the first area and the first terminal device is th within a distance. The first direction may be the direction information in FIG. 3 , and the first distance range may be the distance requirement in FIG. 5 .

In a possible implementation manner, the first message includes a discovery message or a ranging message. The first message may be the discovery message in FIG. 3 to FIG. 6 , or a ranging message, or a directional discovery message.

In a possible implementation manner, this step further includes: the first terminal device acquires demand information, and the demand information includes at least one of the following: direction demand information used to determine the first direction, or used to determine Distance requirement information of the first distance range. For this implementation, reference may be made to the description of step 301 in FIG. 3 , step 401 in FIG. 4 , step 501 in FIG. 5 , or step 601 in FIG. 6 . The direction requirement information is the direction information in FIG. 3 or the direction information in FIG. 6 , and the distance requirement information is the power information in FIG. 4 or the distance information in FIG. 5 . It can be understood that if the power information is set as the distance requirement information according to the method in FIG. a message. That is to say, the power information indirectly reflects the distance between the terminal device that can receive the first message and the source terminal device, so it can be understood as a kind of distance requirement information.

Wherein, in a possible situation, the neighbor-based service layer of the first terminal device acquires the requirement information.

In another possible situation, the neighbor-based service layer of the first terminal device obtains the requirement information from the application layer of the first terminal device.

In a possible implementation manner, the distance requirement information includes at least one of the following: a first distance range, or a first power, where the first power is used to determine the first distance range. The first power is the power information in FIG. 4 .

In a possible implementation manner, the access layer of the first terminal device receives the first message and demand information from the neighbor-based service layer of the first terminal device; the access layer of the first terminal device sends The first area sends the first message.

Step 702, the first terminal device receives one or more response messages.

For this step, reference may be made to the description of step 305 in FIG. 3 , step 405 in FIG. 4 , step 504 in FIG. 5 , or step 604 in FIG. 6 . The one or more response messages may be the response messages in FIG. 3 to FIG. 6 .

In a possible implementation manner, the one or more response messages include time information, and the time information is used to determine a distance between the one or more second terminal devices and the first terminal device. The distance is the distance value in FIG. 5 , and the time information is Treply in FIG. 5 . The above description is also applicable to other implementations in this embodiment, and details are not repeated here.

Step 703, the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device. For this step, reference may be made to the description of step 505 and step 506 in FIG. 5 .

In a possible implementation manner, the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device.

This implementation may include the following situations:

In a possible situation, the neighbor-based service layer of the first terminal device receives the distance between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; the first terminal device The service layer based on the neighbor of the first distance range and the distance between the one or more second terminal devices and the first terminal device, determine the first in the one or more response messages A response message is a response message of the target terminal device.

In another possible situation, the neighbor-based service layer of the first terminal device receives the time-of-flight between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; The neighbor-based service layer of the terminal device determines the distance between the one or more second terminal devices and the first terminal device based on the time-of-flight between the one or more second terminal devices and the first terminal device; The neighbor-based service layer of the first terminal device determines all of the one or more response messages based on the first distance range and the distance between the one or more second terminal devices and the first terminal device. The first response message is a response message of the target terminal device. The time-of-flight is TOF in FIG. 5 , and the above description is also applicable to other implementations in this embodiment, so details are not repeated here.

In a possible implementation manner, the access layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device.

A possible situation of this implementation: the access layer of the first terminal device receives the first distance range from the neighbor-based service layer of the first terminal device; the access layer of the first terminal device determines the one or The distance between multiple second terminal devices and the first terminal device; the access layer of the first terminal device is based on the first distance range and the distance between the one or more second terminal devices and the first terminal device and determining the first response message in the one or more response messages as the response message of the target terminal device.

A possible implementation manner, the access layer of the first terminal device is based on the time point corresponding to the source layer 2 identification information used to send the first message, and the destination layer used to receive the one or more response messages 2 Identify the time point corresponding to the information, and determine the flight time; the access layer of the first terminal device determines the distance between the one or more second terminal devices and the first terminal device according to the flight time.

The beneficial effects of the method shown in FIG. 7 can be described with reference to the beneficial effects of the methods shown in FIGS. 3 to 6 , and will not be repeated here.

FIG. 8 is a schematic flowchart of another method for discovering a target terminal device according to an embodiment of the present application. The schematic diagram will be described in conjunction with FIG. 5 or FIG. 6 . The first terminal device in this embodiment may be the source terminal device in Figure 5 or Figure 6, the access layer of the first terminal device may be the AS layer of the source terminal device in Figure 5 or Figure 6, and the first terminal device The service layer based on the neighbor can be the ProSe layer of the source terminal device in FIG. 5 or FIG. 6 .

For example, the method includes the steps of:

Step 801, the first terminal device sends a first message.

For this step, reference may be made to the description in step 503 in FIG. 5 or step 603 in FIG. 6 .

In a possible implementation manner, the first message includes a discovery message or a ranging message.

In a possible implementation manner, this step further includes: the first terminal device acquires demand information, and the demand information includes at least one of the following: direction demand information used to determine the first direction, or used to determine Distance requirement information of the first distance range. For this implementation, refer to the description of step 501 in FIG. 5 or step 601 in FIG. 6 . The distance requirement information or the first distance range is the distance information in FIG. 5 , and the direction requirement information or the first direction is the direction information in FIG. 6 .

In a possible implementation manner, the distance requirement information includes a first distance range.

Step 802, the first terminal device receives one or more response messages.

For this step, refer to the description of step 504 in FIG. 5 or step 604 in FIG. 6 . The one or more response messages may be the response messages in FIG. 5 or FIG. 6 .

In a possible implementation manner, the one or more response messages include time information, and the time information is used to determine a distance between the one or more second terminal devices and the first terminal device. The distance is the distance value in FIG. 5 , and the foregoing description is also applicable to other implementation manners in this embodiment, so details are not repeated here. The time information is Treply in FIG. 5 , and the foregoing description is also applicable to other implementation manners in this embodiment, so details are not repeated here.

Step 803, the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device.

The first response message includes identification information of the target terminal device, where the first response message satisfies at least one of the following: the first response message comes from a first direction, or, according to the The distance between the target terminal device and the first terminal device obtained from the first response message is within a first distance range.

In a possible implementation manner, the one or more response messages include identifiers of one or more second terminal devices, and the target terminal device is one of the one or more second terminal devices.

This implementation also includes the following possible situations:

In a possible situation, the neighbor-based service layer of the first terminal device receives the distance between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; the first terminal device The neighbor-based service layer determines the first response in the one or more response messages according to the first distance range and the distance between the one or more second terminal devices and the first terminal device The message is a response message of the target terminal device. For this step, reference may be made to the description of step 505 and step 506 in FIG. 5 .

In another possible situation, the neighbor-based service layer of the first terminal device receives the time-of-flight between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; The neighbor-based service layer of the terminal device determines the distance between the one or more second terminal devices and the first terminal device based on the time-of-flight between the one or more second terminal devices and the first terminal device; The neighbor-based service layer of the first terminal device determines all of the one or more response messages based on the first distance range and the distance between the one or more second terminal devices and the first terminal device. The first response message is a response message of the target terminal device. The time-of-flight is the TOF in FIG. 5 , and the above description is also applicable to other implementations in this embodiment, so details are not repeated here. For this step, reference may be made to the description of step 505 and step 506 in FIG. 5 .

In another possible situation, the neighbor-based service layer of the first terminal device receives directions between the one or more second terminal devices and the first terminal device from the access layer of the first terminal device; The neighbor-based service layer of the device determines said first response in said one or more response messages based on said first direction and a direction between said one or more second terminal devices and the first terminal device The message is a response message of the target terminal device. The above description of the angle of arrival in the direction diagram 6 is also applicable to other implementations in this embodiment, so details are not repeated here. For this step, reference may be made to the description of step 605 and step 606 in FIG. 6 .

This implementation also includes the following possible situations:

In a possible situation, the access layer of the first terminal device receives the first direction from the neighbor-based service layer of the first terminal device; the access layer of the first terminal device determines that the one or more second terminal devices The direction between the device and the first terminal device; the access layer of the first terminal device determines the one or more directions between the second terminal device and the first terminal device according to the first direction and the direction between the one or more second terminal devices The first response message in the or multiple response messages is a response message of the target terminal device. For this step, reference may be made to the description of step 605 and step 606 in FIG. 6 .

In another possible situation, the access layer of the first terminal device receives the first distance range from the neighbor-based service layer of the first terminal device; the access layer of the first terminal device determines the one or more first distance ranges The distance between the second terminal device and the first terminal device; the access layer of the first terminal device determines according to the first distance range and the distance between the one or more second terminal devices and the first terminal device The first response message in the one or more response messages is a response message of the target terminal device. For this step, reference may be made to the description of step 505 and step 506 in FIG. 5 .

For the beneficial effects of the method shown in FIG. 8 , reference may be made to the description of the beneficial effects of the method shown in FIG. 5 or FIG. 6 , and details are not repeated here.

Correspondingly, this embodiment of the present application also provides a communication device. The communication device may be the source terminal device in the foregoing method embodiments, or an apparatus including the functions of the source terminal device, or a component with similar functions to the source terminal device. It can be understood that, in order to realize the above functions, the communication device includes hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Fig. 9 is a schematic diagram of a communication device provided according to an embodiment of the present application.

The communication device includes a processing module 901 , a receiving module 902 and a sending module 903 . The processing module 901 is configured to realize processing of data by the communication device. The receiving module 902 is used for receiving the content of the communication device and other units or network elements, and the sending module 903 is used for receiving the content of the communication device and other units or network elements. It should be understood that the processing module 901 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component (or called a processing circuit), and the receiving module 902 may be implemented by a receiver or a receiver-related circuit component. The sending module 903 may be implemented by a transmitter or transmitter-related circuit components.

Exemplarily, the communication device may be a communication device device, and may also be a chip applied in the communication device device or other combined devices, components, etc. having the functions of the above communication device device.

Exemplarily, the communication apparatus may be the source terminal device or the first terminal device in any one of FIG. 3 to FIG. 8 .

When the communication device is the source terminal device or the first terminal device, the sending module 903 is configured to send the first message to the first area through the processing module 901 (such as step 304 in FIG. 3, step 404 in FIG. In step 701), the first area satisfies at least one of the following: the first area is located in the first direction of the first terminal device, or the first area and the first terminal device The distance between is within the first distance range. The receiving module 902 is used to receive one or more response messages (such as step 305 in FIG. 3, step 405 in FIG. 4, step 504 in FIG. 5, step 604 in FIG. 6 and step 702 in FIG. 7), The one or more response messages include identification information of one or more second terminal devices, and the one or more second terminal devices are located in the first area. The processing module 901 is configured to determine that the first response message in the one or more response messages is the response message of the target terminal device (for example, step 307 in FIG. 3, step 407 in FIG. 4, step 505 and Step 506, step 605 and step 606 in FIG. 6, and step 703 in FIG. 7), the first response message includes the identification information of the target terminal device.

In addition, the various modules described above may also be used in other processes that support the techniques described herein. For the beneficial effect, reference may be made to the foregoing description, and details are not repeated here.

When the communication device is the source terminal device or the first terminal device, the sending module 903 is used to send the first message (such as steps 501 to 503 in FIG. 5, steps 601 to 603 in FIG. 6, and step 801). The receiving module 902 is configured to receive one or more response messages (such as step 504 in FIG. 5 , step 604 in FIG. 6 and step 802 in FIG. 8 ). The processing module 901 is configured to determine that the first response message in the one or more response messages is a response message of the target terminal device (for example, steps 505 and 506 in FIG. 5, steps 605 and 606 in FIG. 6, and Step 803 in FIG. 8 ), the first response message includes the identification information of the target terminal device, wherein the first response message satisfies at least one of the following: the first response message is from the first One direction, or, the distance between the target terminal device and the first terminal device obtained according to the first response message is within a first distance range.

FIG. 10 is a schematic diagram of another communication device provided according to an embodiment of the present application. The communication device includes: a processor 1001 , a communication interface 1002 , and a memory 1003 . Wherein, the processor 1001, the communication interface 1002, and the memory 1003 can be connected to each other through a bus 1004; the bus 1004 can be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus etc. The above-mentioned bus 1004 can be divided into address bus, data bus, control bus and so on. For ease of representation, only one line is used in FIG. 10 , but it does not mean that there is only one bus or one type of bus. The processor 1001 may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP. The processor may further include hardware chips. The aforementioned hardware chip may be an application-specific integrated circuit (application-specific integrated circuit, ASIC), a programmable logic device (programmable logic device, PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), a general array logic (Generic Array Logic, GAL) or any combination thereof. Memory 1003 may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory.

Wherein, the processor 1001 is used to realize the data processing operation of the communication device, and the communication interface 1002 is used to realize the receiving operation and the sending operation of the communication device.

When the communication device is the source terminal device or the first terminal device, the communication interface 1002 is used to send the first message to the first area (such as steps 301 to 304 in FIG. 3, steps 401 to 404 in FIG. 4, and step 701 in FIG. 7 ), the first area satisfies at least one of the following: the first area is located in the first direction of the first terminal device, or the first area and the first The distance between a terminal device is within the first distance range, and is used to receive one or more response messages (such as step 305 in FIG. 3, step 405 in FIG. 4, step 504 in FIG. 5, and and step 702 in FIG. 7 ), the one or more response messages include identification information of one or more second terminal devices, and the one or more second terminal devices are located in the first area. The processor 1001 is configured to determine that the first response message in the one or more response messages is the response message of the target terminal device (for example, step 307 in FIG. 3, step 407 in FIG. 4, step 505 and Step 506, Step 605 and Step 606 in FIG. 6, and Step 703 in FIG. 7). In addition, the various modules described above may also be used in other processes that support the techniques described herein. For the beneficial effect, reference may be made to the foregoing description, and details are not repeated here.

When the communication device is the source terminal device or the first terminal device, the communication interface 1002 is used to send the first message (such as steps 501 to 503 in FIG. 5, steps 601 to 603 in FIG. 6, and Step 801), and for receiving one or more response messages (such as step 504 in FIG. 5, step 604 in FIG. 6 and step 802 in FIG. 8). The processor 1001 is configured to determine that the first response message in the one or more response messages is a response message of the target terminal device (for example, steps 505 and 506 in FIG. 5, steps 605 and 606 in FIG. 6, and Step 803 in FIG. 8 ), the first response message includes the identification information of the target terminal device, wherein the first response message satisfies at least one of the following: the first response message is from the first One direction, or, the distance between the target terminal device and the first terminal device obtained according to the first response message is within a first distance range. In addition, the various modules described above may also be used in other processes that support the techniques described herein. For the beneficial effect, reference may be made to the foregoing description, and details are not repeated here.

An embodiment of the present application provides a communication system, which includes the aforementioned first terminal device or source terminal device, wherein the first terminal device executes the first terminal device or source terminal in any of the embodiments shown in FIG. 3 to FIG. 8 In the method performed by the device, the source terminal device performs the method performed by the first terminal device or the source terminal device in any of the embodiments shown in FIG. 3 to FIG. 8 .

An embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer can implement the Figures 3 to 8 provided by the above-mentioned method embodiments. The processes related to the first terminal device or the source terminal device in any one of the shown embodiments, or, the computer can implement the second terminal device in any of the embodiments shown in Figure 3 to Figure 8 provided in the above method embodiment or target end-device or other end-device related processes.

An embodiment of the present application also provides a computer program product, the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement any one of Figures 3 to 8 provided in the above method embodiments. The processes related to the first terminal device or the source terminal device in the illustrated embodiment, or, the computer can implement the second terminal device or the target terminal in any of the embodiments shown in Figure 3 to Figure 8 provided in the above method embodiment Device or other end-device related processes.

The present application also provides a chip, including a processor. The processor is configured to read and execute the computer program stored in the memory, so as to execute the corresponding operations and/or processes in the source terminal device or the first terminal device in the charging method provided in this application. Optionally, the chip further includes a memory, the memory is connected to the processor through a circuit or wires, and the processor is used to read and execute the computer program in the memory. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is used to receive processed data and/or information, and the processor obtains the data and/or information from the communication interface, and processes the data and/or information. The communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip. The processor may also be embodied as a processing circuit or logic circuit.

The above-mentioned chip can also be replaced by a system-on-a-chip, which will not be repeated here.

The terms "comprising" and "having" and any variations thereof in this application are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units need not be limited to the ones explicitly listed Instead, other steps or elements not explicitly listed or inherent to the process, method, product or apparatus may be included.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to the actual situation to realize the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

In addition, the terms "first" and "second" in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

Although the application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely illustrative of the application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of this application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims

A communication method for a terminal device, characterized in that the method comprises:

The first terminal device sends a first message to a first area, and the first area satisfies at least one of the following: the first area is located in a first direction of the first terminal device, or, the first area The distance from the first terminal device is within a first distance range;

The first terminal device receives one or more response messages, where the one or more response messages include identification information of one or more second terminal devices, and the one or more second terminal devices are located at the first area;

The first terminal device determines that a first response message among the one or more response messages is a response message of the target terminal device, and the first response message includes identification information of the target terminal device.
According to the method according to claim 1, the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device, comprising:

The neighbor-based service layer of the first terminal device determines that the first response message among the one or more response messages is a response message of the target terminal device.
According to the method according to claim 2, the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device, comprising:

The neighbor-based service layer of the first terminal device receives distances between the one or more second terminal devices and the first terminal device from an access layer of the first terminal device;

The neighbor-based service layer of the first terminal device determines the one or more responses based on the first distance range and the distance between the one or more second terminal devices and the first terminal device The first response message in the message is a response message of the target terminal device.
According to the method according to claim 2, the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device, comprising:

The neighbor-based service layer of the first terminal device receives time-of-flight between the one or more second terminal devices and the first terminal device from an access layer of the first terminal device;

The neighbor-based service layer of the first terminal device determines the connection between the one or more second terminal devices and the first terminal device based on a time-of-flight between the one or more second terminal devices and the first terminal device. a distance between terminal equipment;

The neighbor-based service layer of the first terminal device determines the one or more responses based on the first distance range and the distance between the one or more second terminal devices and the first terminal device The first response message in the message is a response message of the target terminal device.
According to the method according to claim 1, the first terminal device determining that the first response message in the one or more response messages is the response message of the target terminal device comprises:

The access layer of the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device.
According to the method according to claim 5, the access layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device, comprising:

The access layer of the first terminal device receives the first distance range from a neighbor-based service layer of the first terminal device;

The access layer of the first terminal device determines the distance between the one or more second terminal devices and the first terminal device;

The access layer of the first terminal device determines, according to the first distance range and the distance between the one or more second terminal devices and the first terminal device, in the one or more response messages The first response message is a response message of the target terminal device.
According to the method of claim 6, the access layer of the first terminal device determines the distance between the one or more second terminal devices and the first terminal device, comprising:

The access layer of the first terminal device corresponds to the time point corresponding to the source layer 2 identification information used to send the first message, and the time point corresponding to the destination layer 2 identification information used to receive the one or more response messages. time point, to determine the flight time;

The access layer of the first terminal device determines the distance between the one or more second terminal devices and the first terminal device according to the time-of-flight.
According to the method according to any one of claims 1-7, the sending of the first message to the first area by the first terminal device includes:

The access layer of the first terminal device receives the first message and demand information from the neighbor-based service layer of the first terminal device;

The access layer of the first terminal device sends the first message to the first area according to the demand information.
A communication method for a terminal device, characterized in that the method comprises:

the first terminal device sends a first message;

The first terminal device receives one or more response messages;

The first terminal device determines that a first response message among the one or more response messages is a response message of the target terminal device, and the first response message includes identification information of the target terminal device, wherein the The first response message satisfies at least one of the following: the first response message is from a first direction, or the target terminal device and the first terminal device are obtained according to the first response message The distance is within the first distance range.
The method of claim 9, further comprising:

The one or more response messages include identifiers of one or more second terminal devices, and the target terminal device is one of the one or more second terminal devices.
According to the method according to claim 10, the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device, comprising:

The neighbor-based service layer of the first terminal device determines that the first response message among the one or more response messages is a response message of the target terminal device.
The method according to claim 11, wherein the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device, comprising:

The neighbor-based service layer of the first terminal device receives distances between the one or more second terminal devices and the first terminal device from an access layer of the first terminal device;

The neighbor-based service layer of the first terminal device determines the one or more responses based on the first distance range and the distance between the one or more second terminal devices and the first terminal device The first response message in the message is a response message of the target terminal device.
The method according to claim 11, wherein the neighbor-based service layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device, comprising:

The neighbor-based service layer of the first terminal device receives time-of-flight between the one or more second terminal devices and the first terminal device from an access layer of the first terminal device;

The neighbor-based service layer of the first terminal device determines the connection between the one or more second terminal devices and the first terminal device based on a time-of-flight between the one or more second terminal devices and the first terminal device. a distance between terminal equipment;

The neighbor-based service layer of the first terminal device determines the one or more responses based on the first distance range and the distance between the one or more second terminal devices and the first terminal device The first response message in the message is a response message of the target terminal device.
The method according to any one of claims 11 to 13, wherein the neighbor-based service layer of the first terminal device determines that the first response message among the one or more response messages is the target terminal device's Response message, including:

The neighbor-based service layer of the first terminal device receives directions between the one or more second terminal devices and the first terminal device from an access layer of the first terminal device;

The neighbor-based service layer of the first terminal device determines the one or more response messages based on the first direction and the direction between the one or more second terminal devices and the first terminal device The first response message in is the response message of the target terminal device.
According to the method according to claim 10, the first terminal device determining that the first response message in the one or more response messages is the response message of the target terminal device comprises:

The access layer of the first terminal device determines that the first response message in the one or more response messages is a response message of the target terminal device.
According to the method according to claim 15, the access layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device, comprising:

The access layer of the first terminal device receives the first direction from a neighbor-based service layer of the first terminal device;

The access layer of the first terminal device determines a direction between the one or more second terminal devices and the first terminal device;

The access layer of the first terminal device determines, according to the first direction and the directions between the one or more second terminal devices and the first terminal device, the The first response message is a response message of the target terminal device.
According to the method according to claim 15 or 16, the access layer of the first terminal device determines that the first response message in the one or more response messages is the response message of the target terminal device, comprising:

The access layer of the first terminal device receives the first distance range from a neighbor-based service layer of the first terminal device;

The access layer of the first terminal device determines the distance between the one or more second terminal devices and the first terminal device;

The access layer of the first terminal device determines, according to the first distance range and the distance between the one or more second terminal devices and the first terminal device, in the one or more response messages The first response message is a response message of the target terminal device.
According to the method according to any one of claims 1-8 or 10-17, the one or more response messages include time information, and the time information is used to determine the relationship between the one or more second terminal devices and the The distance between the first terminal devices.
The method according to any one of claims 1-18, further comprising:

The first terminal device acquires requirement information, and the requirement information includes at least one of the following: direction requirement information for determining the first direction, or distance requirement information for determining the first distance range .
According to the method according to claim 19, the acquisition of demand information by the first terminal device comprises:

The neighbor-based service layer of the first terminal device acquires the requirement information.
According to the method according to claim 20, the neighbor-based service layer of the first terminal device acquires the demand information, comprising:

The neighbor-based service layer of the first terminal device acquires the demand information from the application layer of the first terminal device.
According to the method according to any one of claims 19-21, the distance requirement information includes at least one of the following: a first distance range, or a first power, and the first power is used to determine the first distance range.
A communication device, characterized by comprising a processor;

The processor is used to read and execute a program from the memory, so as to realize the method according to any one of claims 1-8.
A communication device, characterized by comprising a processor;

The processor is used to read and execute a program from the memory, so as to realize the method according to any one of claims 9-22.
A computer program product comprising instructions, characterized in that, when it is run on a computer, it causes the computer to execute the method as claimed in any one of claims 1 to 22.
A computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, the processor is made to execute the method according to any one of claims 1 to 22.