Sidelink communication method and terminal device

Abstract

Provided are a sidelink communication method and a terminal device. The method comprises: a first terminal device sends a first discovery message, the first discovery message comprising first information, wherein the first information is associated with one or more of the following: positioning quality of service (QoS) and a positioning method. In embodiments of the present application, information associated with positioning QoS and / or a positioning method is introduced into a discovery message, thereby facilitating discovery of a suitable sidelink positioning server terminal device.

Description

Sideline communication method and terminal equipment Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a sideline communication method and terminal equipment. Background Art

[0002] In traditional ranging / sidelink positioning solutions, the target terminal device to be positioned can discover or select an anchor terminal device and a sidelink positioning server terminal device through a discovery process. The target terminal device can then locate the target terminal device based on the discovered or selected anchor terminal device and the sidelink positioning server terminal device. However, how to discover and select an appropriate sidelink positioning server terminal device is not yet clear.

[0003] Summary of the Invention

[0004] The present application provides a sideline communication method and terminal device. The following introduces various aspects involved in the present application.

[0005] In a first aspect, a sideline communication method is provided, comprising: a first terminal device sends a first discovery message, wherein the first discovery message contains first information; wherein the first information is associated with one or more of the following: positioning QoS; and a positioning method.

[0006] In a second aspect, a sideline communication method is provided, including: a second terminal device receives a first discovery message, the first discovery message containing first information; wherein the first information is associated with one or more of the following: positioning QoS; and positioning method.

[0007] According to a third aspect, a terminal device is provided, which is a first terminal device and includes: a communication unit for sending a first discovery message, wherein the first discovery message includes first information; wherein the first information is associated with one or more of the following: positioning QoS; and positioning the terminal device.

[0008] In a fourth aspect, a terminal device is provided, which is a second terminal device, comprising: a communication unit for receiving a first discovery message, wherein the first discovery message contains first information; wherein the first information is associated with one or more of the following: positioning QoS; and positioning the terminal device.

[0009] In a fifth aspect, a terminal device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the annotation processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal executes a method as described in any one of the first aspect or the second aspect.

[0010] In a sixth aspect, a device is provided, comprising a processor for calling a program from a memory so that the device executes a method as described in any one of the first aspect or the second aspect.

[0011] In a seventh aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes a method as described in any one of the first aspect or the second aspect.

[0012] In an eighth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method as described in any one of the first aspect or the second aspect.

[0013] In a ninth aspect, a computer program product is provided, comprising a program, wherein the program enables a computer to execute the method as described in any one of the first aspect or the second aspect.

[0014] In a tenth aspect, a computer program is provided, wherein the computer program enables a computer to execute the method as described in any one of the first aspect or the second aspect.

[0015] The embodiment of the present application introduces information associated with positioning QoS and / or positioning method into the discovery message, which helps to discover a suitable side positioning server terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a system architecture diagram of a wireless communication system to which an embodiment of the present application may be applied.

[0017] FIG2 is a schematic diagram of the ranging / sidelink positioning process.

[0018] FIG3 is a schematic diagram of the discovery process of mode A. FIG.

[0019] FIG4 is a schematic diagram of the discovery process of mode B.

[0020] FIG5 is a flow chart of the sideline communication method according to an embodiment of the present application.

[0021] FIG6 is a flow chart of a possible implementation of the method shown in FIG5 .

[0022] FIG7 is a flowchart of another possible implementation of the method shown in FIG5 .

[0023] FIG8 is a flowchart of another possible implementation of the method shown in FIG5 .

[0024] FIG9 is a flowchart of another possible implementation of the method shown in FIG5 .

[0025] FIG10 is a flowchart of another possible implementation of the method shown in FIG5 .

[0026] FIG11 is a flowchart of another possible implementation of the method shown in FIG5 .

[0027] FIG12 is a schematic structural diagram of a terminal device provided in one embodiment of the present application.

[0028] FIG13 is a schematic structural diagram of a terminal device provided in another embodiment of the present application.

[0029] FIG14 is a schematic structural diagram of a device according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present application, the following first introduces the communication system and communication process applicable to the embodiments of the present application in conjunction with the accompanying drawings.

[0031] Figure 1 shows a wireless communication system 100 to which embodiments of the present application may be applied. The wireless communication system 100 may include a network device 110 and terminal devices 121 to 129. The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices within the coverage area.

[0032] In some implementations, terminal devices may communicate with each other via a sidelink (SL). Sidelink communication may also be referred to as proximity services (ProSe) communication, unilateral communication, sidelink communication, or device-to-device (D2D) communication.

[0033] In other words, sidelink data is transmitted between terminal devices via a sidelink. The sidelink data may include data and / or control signaling. In some implementations, the sidelink data may be, for example, a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), a PSCCH demodulation reference signal (DMRS), a PSSCH DMRS, a physical sidelink feedback channel (PSFCH), etc.

[0034] The following describes several common sidelink communication scenarios with reference to Figure 1. Sidelink communication can be categorized into four scenarios, depending on whether the terminal device in the sidelink is within the coverage of the network device. Scenario 1: The terminal device conducts sidelink communication within the coverage of the network device. Scenario 2: Some terminal devices conduct sidelink communication within the coverage of the network device. Scenario 3: The terminal device conducts sidelink communication outside the coverage of the network device.

[0035] As shown in Figure 1, in scenario 1, terminal devices 121-122 can communicate via a sidelink, and terminal devices 121-122 are all within the coverage of network device 110, or in other words, terminal devices 121-122 are all within the coverage of the same network device 110. In this scenario, network device 110 can send configuration signaling to terminal devices 121-122, and accordingly, terminal devices 121-122 communicate via the sidelink based on the configuration signaling.

[0036] As shown in Figure 1, in scenario 2, terminal devices 123 to 124 can communicate via a side link, and terminal device 123 is within the coverage of network device 110, while terminal device 124 is outside the coverage of network device 110. In this scenario, terminal device 123 receives configuration information from network device 110 and communicates via a side link based on the configuration of the configuration signaling. However, for terminal device 124, since terminal device 124 is outside the coverage of network device 110, it cannot receive the configuration information of network device 110. At this time, terminal device 124 can obtain the configuration of the side link communication based on the configuration information according to pre-configuration and / or the configuration information sent by terminal device 123 within the coverage area, so as to communicate with terminal device 123 via the side link based on the obtained configuration.

[0037] In some cases, the terminal device 123 may send the above configuration information to the terminal device 124 via the sidelink broadcast channel PSBCH to configure the terminal device 124 to communicate via the sidelink.

[0038] As shown in Figure 1, in scenario 3, terminal devices 125-129 are all outside the coverage of network device 110 and cannot communicate with network device 110. In this case, the terminal devices can configure sidelink communication based on pre-configuration information.

[0039] In some cases, terminal devices 127-129 located outside the coverage area of ​​the network device can form a communication group, and the terminal devices 127-129 in the communication group can communicate with each other. In addition, the terminal device 127 in the communication group can serve as a central control node, also known as a cluster header (CH), and correspondingly, the terminal devices in other communication groups can be referred to as "group members."

[0040] The terminal device 127 as a CH can have one or more of the following functions: responsible for establishing a communication group; joining and leaving group members; coordinating resources, allocating side transmission resources to group members, and receiving side feedback information from group members; coordinating resources with other communication groups, etc.

[0041] It should be noted that Figure 1 exemplarily shows a network device and multiple terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and the coverage range of each network device may include other numbers of terminal devices. This embodiment of the present application does not limit this.

[0042] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0043] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0044] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects, and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides side traffic data between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using side traffic data. The cellular phone and smart home devices communicate with each other without relaying the communication signal through a base station.

[0045] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0046] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0047] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0048] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0049] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0050] Sidelink-based positioning

[0051] Some protocols (for example, in 3GPP R-17) have conducted research on sidelink-based positioning. For example, studies have been conducted on "NR positioning enhancement" and "Scenarios and requirements for NR positioning use cases in coverage, partial coverage and out of coverage". Among them, the study on "Scenarios and requirements for NR positioning use cases in coverage, partial coverage and out of coverage" focuses on V2X and public safety use cases. In addition, some organizations (such as the 3GPP SA1 working group) have also developed requirements for "ranging-based services" and positioning accuracy requirements for IoT use cases in out-of-coverage scenarios. 3GPP needs to study and develop sidelink-based positioning solutions to support the use cases, scenarios and requirements identified in these activities.

[0052] To improve positioning accuracy, especially for UEs outside cellular network coverage, 3GPP completed feasibility and performance studies of positioning technology based on sidestream positioning reference signals in the early stages of Release 18. Next, 3GPP will standardize solutions for sidestream positioning (including ranging and direction finding) in NR systems. This sidestream positioning solution primarily includes the following standardization work.

[0053] Standardization Work 1: Standardization of the Side Positioning Reference Signal (SL PRS). The SL PRS can use a frequency-domain structure based on a comb pattern (including full RE mapping mode) and a pseudo-random sequence format. The SL PRS can be designed based on the existing DL-PRS sequence and support a maximum SL PRS bandwidth of 100 MHz in FR1.

[0054] Standardization work 2: Standardization of measurements used for sideways positioning. For example, standardization supports measurements of SL round trip time (RTT), SL angle of arrival (AOA), and SL time difference of arrival (TDOA) positioning methods.

[0055] Standardization work three: Standardize the resource allocation scheme of SL PRS. For example, the resource allocation scheme of SL PRS includes resource allocation scheme 1 and scheme 2, where scheme 1 corresponds to the network allocating SL PRS resources, and scheme 2 corresponds to the UE autonomously selecting SL PRS resources. In some implementations, the system supports SL PRS and Rel-16 / 17 / 18 sideline communication shared resource pool and SL PRS dedicated resource pool. In some implementations, for scheme 2, it is necessary to study and standardize one or more of the following: resource selection based on channel sensing, random resource selection, congestion control, and resource selection based on UE coordination.

[0056] Standardization work 4: Standardize the open-loop power control mechanism for SL PRS transmission.

[0057] Out-of-coverage sidelink-based positioning

[0058] Some protocols (for example, 3GPP TS 23.586) provide a ranging / sidelink positioning solution outside the network coverage range, which is applicable to ranging / sidelink positioning scenarios where the terminal device is not within the network coverage range. In this scenario, ranging / sidelink positioning of the terminal device can be performed through the PC5 interface. Ranging refers to determining the distance between two or more terminal devices and / or the direction of one terminal device to another terminal device. Sidelink-based positioning refers to obtaining the absolute position or relative position of the terminal device based on the sidelink.

[0059] In the side-moving positioning solution, terminal devices can be divided into side-moving positioning client terminal devices, target terminal devices, side-moving reference terminal devices and side-moving positioning server terminal devices according to different roles.

[0060] The target terminal device may also be referred to as a target UE (target UE). The target terminal device generally refers to the terminal device to be located.

[0061] The sidewalk positioning client terminal device may also be referred to as a sidewalk positioning client UE (SL positioning client UE). The sidewalk positioning client terminal device may be used to send a ranging / sidewalk positioning service request to a target terminal device.

[0062] A sidewalk reference terminal device may also be referred to as a sidewalk located terminal device, a sidewalk located UE (SL located UE), an anchor terminal device, or an anchor UE. Generally speaking, the location of the sidewalk reference terminal device is known. The location of the sidewalk reference terminal device can be used as reference information for locating the target terminal device.

[0063] A sidewalk positioning server terminal device may also be referred to as a sidewalk positioning server UE (SL positioning server UE). This sidewalk positioning server terminal device may be used to provide functions such as assistive data distribution and / or position calculation for sidewalk positioning of a target terminal device. It should be understood that a target terminal device or a sidewalk reference positioning terminal device may also function as a sidewalk positioning server terminal device.

[0064] Two terminal devices among the side-travel positioning client terminal device, the target terminal device, the side-travel reference terminal device and the side-travel positioning server terminal device can communicate through the PC5 interface.

[0065] The ranging / sidelink positioning scheme outside the network coverage range can be understood as a ranging / sidelink positioning scheme for terminal device operation only (UE-only operation). That is to say, in this scheme, the processing of service requests and the calculation of results are performed by the terminal device without the participation of network equipment. For ease of understanding, the positioning process applicable to the embodiment of the present application is described below in conjunction with Figure 2. As shown in Figure 2, the scheme includes steps S210 to S290.

[0066] In step S210, the target terminal device receives a ranging / sidelink positioning service request, which may be used to request ranging / sidelink positioning for the target terminal device.

[0067] For example, the service request may be a service request sent by a side-tracking positioning client terminal device to a target terminal device (see step S210a in FIG2 ). If the side-tracking positioning client terminal device wishes to obtain the absolute positioning of the target terminal device, the service request may include one or more of the following: user information of the side-tracking positioning client terminal device, user information of the target terminal device, and required positioning service quality (QoS). If the side-tracking positioning client terminal device wishes to obtain the relative positioning of the target terminal device, the service request may include one or more of the following: user information of the side-tracking positioning client terminal device, user information of the target terminal device, user information of the side-tracking reference terminal device, and required positioning service quality, etc.

[0068] For another example, the service request may be a service request sent by the sidelink positioning protocol / ranging and sidelink positioning protocol (SLPP / RSPP) application layer of the target terminal device (see step S210b in Figure 2). In some implementations, the service request may include one or more of the following: the type of positioning result (such as absolute position, relative position, or ranging information) and the required QoS.

[0069] In step S220, the target terminal device discovers other terminal devices through a discovery process. The other terminal devices mentioned here may include, for example, anchor terminal devices and / or side positioning server terminal devices.

[0070] In step S230 , if there is no terminal device served by the wireless access network within the network coverage, or the serving network does not support ranging / sidelink positioning, the target terminal device performs terminal device-only operation.

[0071] In step S240 , capability interaction is performed between the target terminal device and other terminal devices.

[0072] In step S250, if the target terminal device does not support the sidelink positioning server function and no sidelink positioning server terminal device is found in step S220, the target terminal device finds the sidelink positioning server terminal device and requires it to participate in ranging / sidelink positioning.

[0073] In step S260, auxiliary data for sideways positioning is transmitted between the target terminal device, the anchor terminal device, and the sideways positioning server terminal device.

[0074] It should be noted that the above step S240 can also be performed before steps S250 and S260, and can be coordinated by the side positioning server terminal device.

[0075] In step S270 , the target terminal device and the anchor terminal device measure the SL-PRS.

[0076] For example, the target terminal device and the anchor terminal device may measure the SL-PRS between the target terminal device and the anchor terminal device. Optionally, the anchor terminal device may also measure the SL-PRS transmitted between each anchor terminal device.

[0077] In step S280, the target terminal device and the anchor terminal device send the SL-PRS measurement data to the sidewalk positioning server terminal device, and the sidewalk positioning server terminal device calculates the positioning result based on the measurement data.

[0078] It should be noted that if the target terminal device supports the sidewalk positioning server function, the SL-PRS measurement data can also be transmitted to the target terminal device. Accordingly, the sidewalk positioning server terminal device or the target terminal device can calculate the absolute position, relative position, or ranging information of the target terminal device based on the SL-PRS measurement data according to the result type received in step S210.

[0079] In step S290a, if the ranging / sidelink positioning service request is sent by the sidelink positioning client terminal device, the target terminal device sends the positioning result of the target terminal device to the sidelink positioning client terminal device.

[0080] In step S290b, if the ranging / sidelink positioning service request is sent by the RSPP application layer, the target terminal device sends the positioning result of the target terminal device to the RSPP application layer.

[0081] Positioning QoS

[0082] The QoS for the location service (LCS), also known as "positioning QoS," is specified in some protocols (e.g., TS 23.273) to characterize location requests. It can be determined by the operator or through negotiation with the LCS client or application function (AF). It should be understood that the LCS QoS provided by the LCS client or AF in a location request is optional.

[0083] In some implementations, the characteristics of the LCS QoS information may include three key attributes, which are described below.

[0084] The first attribute is the LCS QoS class. The LCS QoS class defines the degree to which an LCS service adheres to another QoS parameter, such as accuracy, if that parameter is required. Currently, there are three main LCS QoS classes: best effort class, multiple QoS class, and assured class.

[0085] The second attribute is accuracy, such as horizontal accuracy as specified in clause 4.3.1 of TS 22.071, or vertical accuracy as specified in clause 4.3.2 of TS 22.071.

[0086] The third attribute is response time, which refers to the maximum tolerated time between receiving an LCS request and sending an LCS response containing the positioning result. Response delay can be, for example, no delay, low delay, or delay tolerant as specified in clause 4.3.3 of TS 22.071.

[0087] Positioning method

[0088] Existing positioning methods include enhanced cell ID-based positioning methods, round-trip time-based (RTT-based) positioning methods, time difference of arrival-based (TDOA-based) positioning methods, and angle-of-arrival-based (AOA-based) positioning methods.

[0089] Different positioning methods may be able to meet different positioning QoS. In other words, different positioning methods may be associated with different positioning QoS. In some implementations, different positioning methods may be able to meet different positioning accuracy. For example, the positioning accuracy of the positioning method based on the enhanced cell ID is the worst, the positioning accuracy of the positioning method based on the angle of arrival is the second worst, the positioning accuracy of the positioning method based on the time difference of arrival is medium, and the positioning accuracy of the positioning method based on the round-trip delay is the best. In other words, the positioning accuracy of the positioning method based on the enhanced cell ID is lower than the positioning accuracy of the positioning method based on the angle of arrival, the positioning accuracy of the positioning method based on the angle of arrival is lower than the positioning accuracy of the positioning method based on the time difference of arrival, and the positioning accuracy of the positioning method based on the time difference of arrival is lower than the positioning accuracy of the positioning method based on the round-trip delay.

[0090] In other implementations, different positioning methods require different processing times, which may result in different response delays. For example, because a positioning method based on round-trip delay requires two transmissions of a reference signal, the response delay corresponding to this positioning method is longer than that of other positioning methods.

[0091] Provide Capabilities information

[0092] In some implementations, the target terminal device may indicate the LPP capability of the target terminal device by providing capability information (also referred to as "capability information") in an LPP message.

[0093] For ease of understanding, a code for capability information is shown below. Referring to the code for capability information, the information elements (IE) included in the capability information may include one or more of the following: common IE capabilities (expressed as "commonIEsProvideCapabilities"); assisting-gnss (A-GNSS) capability information (expressed as "a-gnss-ProvideCapabilities"); observed time difference of arrival (OTDOA) capability information (expressed as "otdoa-ProvideCapabilities"); enhanced positioning technology based on Cell ID (enhanced Cell-ID, E-CID) capability information (expressed as "ecid-ProvideCapabilities"); enhanced protocol data unit (E-PDU) capability information (expressed as "epdu-ProvideCapabilities"); sensor capability information (expressed as "sensor-ProvideCapabilities"); transport block size (transport block size, TBS) capability information (expressed as "tbs-ProvideCapabilities"); wireless local area network (WLAN) capability information (expressed as "wlan-ProvideCapabilities"); Bluetooth (BT) capability information (expressed as "bt-ProvideCapabilities"); new radio-ECID-based enhanced positioning technology for Cell ID (new radio-ECID, NR-ECID) capability information (expressed as "nr-ECID-ProvideCapabilities"); new radio-multiplr-rtt-based multi-round-trip time (NR-Multi-RTT) capability information (expressed as "nr-Multi-RTT-ProvideCapabilities"); nr-DL-AoD capability information (expressed as "nr-DL-AoD-ProvideCapabilities");New radio time difference of arrival based positioning technology (NR-DL-TDOA) capability information (expressed as "nr-DL-TDOA-ProvideCapabilities"); New radio uplink (NR-UL) capability information (expressed as "nr-UL-ProvideCapabilities");

[0094] Discovery Process

[0095] Currently, the discovery procedure is divided into two models: model A and model B.

[0096] Mode A defines two roles for prose-enabled UEs participating in prose direct discovery: the announcing UE and the monitoring UE. The announcing UE can use announcement messages (also known as "discovery announcement messages") to announce information related to the announcing UE, which can be used by adjacent UEs with discovery permissions. The monitoring UE can monitor nearby announcing UEs for information of interest. The monitoring UE has discovery permissions and can discover announcing UEs that meet its needs.

[0097] Figure 3 shows the discovery process for Mode A. The broadcasting terminal device broadcasts notification messages at predefined discovery intervals. Interested listening terminals can then read and process these messages. This mode can be understood as the broadcasting terminal device broadcasting "I'm here." For example, the notification message can include a ProSe application code.

[0098] Mode B defines two roles for proximity-enabled UEs participating in proximity direct discovery when using restricted discovery types: the discoverer UE and the discoveree UE. A discoverer UE can send a solicitation message (also known as a "discovery request message") containing information it is interested in discovering, thereby discovering UEs that meet its needs. A discovered UE can receive the solicitation message and respond with a response message (also known as a "discovery response message") containing information related to the request message.

[0099] The discovery process of mode B is shown in Figure 4, which is equivalent to the discovery terminal device sending "Who is there / Where are you" through the discovery request message. That is, the discovery terminal device can send information about other terminal devices that hope to receive a response through the discovery terminal device. For example, the information can be a ProSe application identifier corresponding to the group, and members of the group can respond.

[0100] In the above-mentioned ranging / sidelink positioning scheme, the target terminal device can discover or select an anchor terminal device and a sidelink positioning server terminal device by performing a discovery process, and locate the target terminal device based on the discovered or selected anchor terminal device and the sidelink positioning server terminal device. However, how to discover and select an appropriate sidelink positioning server terminal device is not yet clear.

[0101] In the ranging / sidelink positioning solution shown in Figure 2, the target terminal device to be positioned needs to discover or select a sidelink positioning server terminal device. However, how to discover and select a suitable sidelink positioning server terminal device is not yet clear.

[0102] In response to the above problems, the embodiments of the present application are described in detail.

[0103] It can be seen from the positioning process described in Figure 2 above that the service request for ranging / sidelink positioning received by the target terminal device carries positioning QoS information (or positioning QoS requirements), and thus the positioning method that can meet the positioning QoS information can be determined. Therefore, before the sidelink positioning server terminal device is finally selected, only the target terminal device can obtain the positioning QoS information. Taking this into account, the embodiment of the present application chooses to carry information related to positioning QoS and / or positioning method in the discovery message related to the discovery process of the anchor terminal device and / or the discovery message related to the discovery process of the sidelink positioning server terminal device, so as to select a suitable sidelink positioning server terminal device. The embodiment of the present application is described in detail below in conjunction with Figure 5.

[0104] Figure 5 is a schematic flow chart of a sideline communication method provided by an embodiment of the present application. The method of Figure 5 can be executed by a first terminal device and a second terminal device.

[0105] In some embodiments, the first terminal device is a target terminal device, that is, a terminal device to be located. Accordingly, the second terminal device may be an anchor terminal device or a side positioning server terminal device.

[0106] In some embodiments, the first terminal device is an anchor terminal device or a sidewalk positioning server terminal device. Correspondingly, the second terminal device may be a target terminal device.

[0107] Referring to Figure 5, in step S510, a first terminal device sends a first discovery message. Correspondingly, a second terminal device receives the first discovery message. The first discovery message may include first information associated with one or more of: positioning QoS (or positioning QoS requirement) and positioning method.

[0108] In some embodiments, the first information may be used to discover or select a sidewalk positioning server terminal device.

[0109] In some embodiments, the first discovery message is a discovery message sent during the discovery or selection process of the anchor terminal device.

[0110] In some embodiments, the first discovery message is a discovery message sent during a discovery or selection process of a sideline positioning server terminal device.

[0111] In some embodiments, the first discovery message may be a discovery announcement message. That is, the first information may be carried in the discovery announcement message.

[0112] In some embodiments, the first discovery message may be a discovery solicitation message. That is, the discovery solicitation message may carry the first information.

[0113] In some embodiments, the first discovery message may be a discovery response message. That is, the first information may be carried in the discovery request message.

[0114] For ease of understanding, the method shown in FIG5 is illustrated in more detail below in combination with Example 1, Example 2, and Example 3, taking the first discovery message as a discovery notification message, a discovery request message, and a discovery response message as examples respectively.

[0115] Example 1: The first discovery message is a discovery notification message

[0116] In the first embodiment, the first terminal device may be an anchor terminal device, and the second terminal device may be a target terminal device. The discovery process between the first terminal device and the second terminal device may be a discovery process based on mode A.

[0117] In some implementations, the discovery advertisement message may be used to discover an anchor terminal device.

[0118] In some implementations, the discovery notification message may be used to discover a sidewalk positioning server terminal device.

[0119] In some implementations, the first information may be used to indicate some or all of the positioning QoS information supported by the first terminal device.

[0120] In some implementations, the first information may be used to indicate the most affordable supported positioning QoS information that the first terminal device can provide.

[0121] In some implementations, the positioning QoS information may include or be replaced by a positioning QoS requirement.

[0122] In some implementations, the first information may be used to indicate a positioning method supported by the first terminal device.

[0123] In some implementations, the first information may be used to indicate positioning QoS information and / or positioning methods supported by the first terminal device as a sideline positioning server terminal device.

[0124] In some implementations, if the first discovery message is used to discover an anchor terminal device, the first discovery message may further include information indicating that an anchor terminal device needs to be discovered or selected. This information may be referred to as an anchor terminal device role indication, or an anchor UE role indication.

[0125] In some implementations, if the first discovery message is used to discover a side positioning server terminal device, the first discovery message may further include information indicating that a side positioning server terminal device needs to be discovered or selected. This information may be referred to as a side positioning server terminal device role indication, or a side positioning server UE role indication (SL positioning server UE role indication).

[0126] 6 and 7 , two more specific examples of the first embodiment are given below, taking the discovery process of the anchor terminal device and the side positioning server terminal device as examples.

[0127] The example shown in Figure 6 describes the process of discovering an anchor terminal device. In the example of Figure 6, the first terminal device mentioned above is a candidate anchor terminal device, and the second terminal device mentioned above is a target terminal device.

[0128] 6 , in step S610 , the candidate anchor terminal device sends a discovery notification message. The discovery notification message includes an indication of the anchor terminal device role, the highest QoS information that the candidate anchor terminal device can support, and the positioning methods supported by the candidate anchor terminal device (or the positioning methods supported by the candidate anchor terminal device as a sideline positioning server terminal device).

[0129] In step S620, the target terminal device records the highest QoS information that the candidate anchor terminal device can support and the positioning method supported by the candidate anchor terminal device.

[0130] In step S630, the target terminal device sends a direct communication request to the candidate anchor terminal device. The direct communication request may be used to request to establish a direct link (or PC5 link) with the candidate anchor terminal device.

[0131] In step S640, a direct link is established between the target terminal device and the candidate anchor terminal device.

[0132] In step S650, the target terminal device uses the candidate anchor terminal device as the sidewalk positioning server terminal device, and sends the QoS information of the positioning LCS and / or the list of anchor terminal devices participating in the positioning of the target terminal device to the candidate anchor terminal device.

[0133] In step S660, the candidate anchor terminal device is determined to become the sidewalk positioning server terminal device.

[0134] The example shown in Figure 7 describes the discovery process of the sideways positioning server terminal device. In the example of Figure 7, the first terminal device mentioned above is the candidate sideways positioning server terminal device, and the second terminal device mentioned above is the target terminal device.

[0135] 7 , in step S710 , the candidate sidewalk positioning server terminal device sends a discovery notification message. The discovery notification message includes an optional sidewalk positioning server terminal device role indication, the highest QoS information that the candidate sidewalk positioning server terminal device can support, and the positioning methods supported by the candidate sidewalk positioning server terminal device.

[0136] In step S720, the target terminal device records the highest QoS information that the candidate sideline positioning server terminal device can support and the positioning method supported by the candidate sideline positioning server terminal device.

[0137] In step S730, the target terminal device sends a direct communication request to the candidate sideways positioning server terminal device. The direct communication request may be used to request to establish a direct link (or PC5 link) with the candidate sideways positioning server terminal device.

[0138] In step S740, a direct link is established between the target terminal device and the candidate sideline positioning server terminal device.

[0139] In step S750, the target terminal device uses the candidate side positioning server terminal device as the side positioning server terminal device, and sends the QoS information of the positioning LCS and / or the list of anchor terminal devices participating in the positioning of the target terminal device to the candidate side positioning server terminal device.

[0140] In step S770, the candidate side travel positioning server terminal device is determined to become the side travel positioning server terminal device.

[0141] Example 2: The first discovery message is a discovery request message

[0142] In the second embodiment, the first terminal device may be a target terminal device, and the second terminal device may be a candidate anchor terminal device. The discovery process between the first terminal device and the second terminal device may be a discovery process based on mode B.

[0143] In some implementations, the discovery request message may be used to discover an anchor terminal device.

[0144] In some implementations, the discovery request message may be used to discover a sideline positioning server terminal device.

[0145] In some implementations, the first information may be used to indicate positioning QoS information required by the first terminal device. Alternatively, the first information may be used to indicate positioning QoS information required by a terminal device serving as a sideline positioning server.

[0146] In some implementations, the first information may be used to indicate a positioning method required by the first terminal device. Alternatively, the first information may be used to indicate a positioning method required to be adopted by the sideline positioning server terminal device.

[0147] In some implementations, the discovery request message may further include second information. The second information may be used to indicate that a sideline positioning server terminal device needs to be discovered or selected.

[0148] In some implementations, the discovery request message may further include information indicating that an anchor terminal device needs to be discovered or selected.

[0149] In some implementations, a first terminal device may receive a discovery response message sent by a second terminal device. The discovery response message may include third information. The third information may be used to indicate one or more of the following: that the second terminal device supports the positioning QoS information and / or positioning method required by the first terminal device; and that the second terminal device can serve as a sideline positioning server terminal device. The third information may be, for example, a flag.

[0150] In some implementations, the third information may include a first bit (the first bit may include one bit or multiple bits). If the value of the first bit is a first value, the first bit may be used to indicate that the second terminal device can serve as a sideline positioning server terminal device; and / or, if the value of the first bit is a second value (different from the first value), the first bit may be used to indicate that the second terminal device cannot serve as a sideline positioning server terminal device.

[0151] It should be noted that the embodiments of the present application do not limit the timing of transmitting the above-mentioned discovery response message. In some implementations, if the second terminal device can serve as an anchor terminal device and / or a sideline positioning service terminal device, the second terminal device can send a discovery response message. Conversely, if the second terminal device cannot serve as an anchor terminal device and / or a sideline positioning service terminal device, the second terminal device may not send a discovery response message, which helps reduce the overhead of transmitting the discovery response message.

[0152] In some implementations, the discovery response message may include information indicating that the second terminal device can serve as an anchor terminal device. This information may be, for example, identification information (flag).

[0153] 8 and 9 , two more specific examples of the second embodiment are given below, taking the discovery process of the anchor terminal device and the side positioning server terminal device as examples.

[0154] The example shown in Figure 8 describes the process of discovering an anchor terminal device. In the example of Figure 8, the first terminal device mentioned above is the target terminal device, and the second terminal device mentioned above is the candidate anchor terminal device.

[0155] Referring to Figure 8, in step S810, the target terminal device sends a discovery request message. The discovery request message may include: information indicating the need to discover or select a sideline positioning server terminal device (optional); information indicating the need to discover or select an anchor terminal device; required positioning QoS information; and required positioning method.

[0156] In step S820, the candidate anchor terminal device sends a discovery response message to the target terminal device. The discovery response message may include first identification information (corresponding to the third information mentioned above) and second identification information. The first identification information may be used to indicate that the candidate anchor terminal device supports the positioning QoS information and / or positioning method required by the target terminal device, or that the candidate anchor terminal device can serve as a sideline positioning server terminal device. The second identification information may be used to indicate that the candidate anchor terminal device can serve as an anchor terminal device.

[0157] In step S830, the target terminal device records the first identification information.

[0158] In step S840, the target terminal device sends a direct communication request to the candidate anchor terminal device. The direct communication request may be used to request to establish a direct link (or PC5 link) with the candidate anchor terminal device.

[0159] In step S850, a direct link is established between the target terminal device and the candidate anchor terminal device.

[0160] In step S860, the target terminal device uses the candidate anchor terminal device as the sideline positioning server terminal device, and sends the QoS information of the positioning LCS and / or the list of anchor terminal devices participating in the positioning of the target terminal device to the candidate anchor terminal device.

[0161] In step S870, the candidate anchor terminal device is determined to become the sidewalk positioning server terminal device.

[0162] The example shown in Figure 9 describes the discovery process of the sideways positioning server terminal device. In the example of Figure 9, the first terminal device mentioned above is the target terminal device, and the second terminal device mentioned above is the candidate sideways positioning server terminal device.

[0163] 9 , in step S910 , the target terminal device sends a discovery request message, which may include: information indicating the need to discover or select a sideline positioning server terminal device; required positioning QoS information; and required positioning method.

[0164] In step S920, the candidate sidewalk positioning server terminal device sends a discovery response message to the target terminal device, wherein the discovery response message indicates that the candidate sidewalk positioning server terminal device can serve as the sidewalk positioning server terminal device.

[0165] In step S930, the target terminal device records candidate sidewalk positioning server terminal devices that can serve as the sidewalk positioning server terminal device.

[0166] In step S940, the target terminal device sends a direct communication request to the candidate sideways positioning server terminal device. The direct communication request may be used to request to establish a direct link (or PC5 link) with the candidate sideways positioning server terminal device.

[0167] In step S950, a direct link is established between the target terminal device and the candidate sideline positioning server terminal device.

[0168] In step S960, the target terminal device uses the candidate side positioning server terminal device as the side positioning server terminal device, and sends the QoS information of the positioning LCS and / or the list of anchor terminal devices participating in the positioning of the target terminal device to the candidate side positioning server terminal device.

[0169] In step S970, the candidate side travel positioning server terminal device is determined to become the side travel positioning server terminal device.

[0170] Example 3: The first discovery message is a discovery response message

[0171] In the third embodiment, the first terminal device may be a candidate anchor terminal device, and the second terminal device may be a target terminal device. The discovery process between the first terminal device and the second terminal device may be a discovery process based on mode B.

[0172] In some implementations, the discovery response message may be used to discover an anchor terminal device.

[0173] In some implementations, the discovery response message may be used to discover the sideline positioning server terminal device.

[0174] In some implementations, the first information may be used to indicate positioning QoS information supported by the first terminal device.

[0175] In some implementations, the first information may be used to indicate some or all of the positioning QoS information supported by the first terminal device.

[0176] In some implementations, the first information may be used to indicate the highest positioning QoS information that the first terminal device can provide.

[0177] In some implementations, positioning QoS information may include or be replaced by positioning QoS requirements.

[0178] In some implementations, the first information may be used to indicate a positioning method supported by the first terminal device.

[0179] In some implementations, before the first terminal device sends the first discovery message, the first terminal device receives a discovery request message sent by the second terminal device. The discovery request message may include fourth information, which may be used to indicate the need to discover or select a sideline positioning server terminal device.

[0180] In some implementations, the discovery request message may include information indicating that an anchor terminal device needs to be discovered or selected.

[0181] 10 and 11 , two more specific examples of the third embodiment are given below, taking the discovery process of the anchor terminal device and the side positioning server terminal device as examples.

[0182] The example shown in Figure 10 describes the process of discovering an anchor terminal device. In the example of Figure 10, the first terminal device mentioned above is a candidate anchor terminal device, and the second terminal device mentioned above is a target terminal device.

[0183] 10 , in step S1010 , the target terminal device sends a discovery request message. The discovery request message may include the following information: information indicating that a sideline positioning server terminal device needs to be discovered or selected, and information indicating that an anchor terminal device needs to be discovered or selected.

[0184] In step S1020, the candidate anchor terminal device sends a discovery response message to the target terminal device, wherein the discovery response message includes the highest positioning QoS information that the candidate anchor terminal device can provide and / or the positioning method supported by the candidate anchor terminal device.

[0185] In step S1030, the target terminal device records the highest QoS information that the candidate anchor terminal device can support and the positioning method supported by the candidate anchor terminal device.

[0186] In step S1040, the target terminal device sends a direct communication request to the candidate anchor terminal device. The direct communication request may be used to request to establish a direct link (or PC5 link) with the candidate anchor terminal device.

[0187] In step S1050, a direct link is established between the target terminal device and the candidate anchor terminal device.

[0188] In step S1060, the target terminal device uses the candidate anchor terminal device as the sideline positioning server terminal device, and sends the QoS information of the positioning LCS and / or the list of anchor terminal devices participating in the positioning of the target terminal device to the candidate anchor terminal device.

[0189] In step S1070, the candidate anchor terminal device is determined to become the sidewalk positioning server terminal device.

[0190] The example shown in Figure 11 describes the discovery process of the sideways positioning server terminal device. In the example of Figure 11, the first terminal device mentioned above is the candidate sideways positioning server terminal device, and the second terminal device mentioned above is the target terminal device.

[0191] 11 , in step S1110 , the target terminal device sends a discovery request message, which may include information indicating the need to discover or select a sideline positioning server terminal device.

[0192] In step S1120, the candidate sideways positioning server terminal device sends a discovery response message to the target terminal device, wherein the discovery response message includes the highest positioning QoS information that the candidate sideways positioning server terminal device can provide and / or the positioning methods supported by the candidate sideways positioning server terminal device.

[0193] In step S1130, the target terminal device records the highest QoS information that the candidate sideline positioning server terminal device can support and the positioning method supported by the candidate sideline positioning server terminal device.

[0194] In step S1140, the target terminal device sends a direct communication request to the candidate sideways positioning server terminal device. The direct communication request may be used to request to establish a direct link (or PC5 link) with the candidate sideways positioning server terminal device.

[0195] In step S1150, a direct link is established between the target terminal device and the candidate sidewalk positioning server terminal device.

[0196] In step S1160, the target terminal device uses the candidate side positioning server terminal device as the side positioning server terminal device, and sends the QoS information of the positioning LCS and / or the list of anchor terminal devices participating in the positioning of the target terminal device to the candidate side positioning server terminal device.

[0197] In step S1170, the candidate sidewalk positioning server terminal device is determined to become the sidewalk positioning server terminal device.

[0198] In some implementations, if the first information associated with positioning QoS is carried in the first discovery message, the positioning QoS associated with the first information may include one or more positioning QoS supported by the first terminal device. For example, taking positioning QoS index 1 and positioning QoS index 2 shown in Table 1 as an example, the first information may be associated with the positioning QoS corresponding to positioning QoS index 1 and the positioning QoS corresponding to positioning QoS index 2. Of course, the first information may only be associated with the positioning QoS corresponding to positioning QoS index 1.

[0199] In some embodiments, the first discovery message may be a discovery solicitation message. That is, the discovery solicitation message may carry the first information.

[0200] In some implementations, if the first discovery message carries first information associated with positioning QoS, the positioning QoS associated with the first information may include a positioning QoS requested by the first terminal device. For example, taking positioning QoS index 1 and positioning QoS index 2 shown in Table 1 as an example, the first information may be associated only with the positioning QoS corresponding to positioning QoS index 1.

[0201] In some scenarios, after the first terminal device sends the first information through a discovery request message, it may not be able to discover or select a suitable side positioning server terminal device. At this time, in order to increase the possibility of locating the target terminal device (for example, the first terminal device), the first terminal device can lower the positioning QoS parameters and resend the discovery request message.

[0202] It should be noted that the embodiments of the present application do not limit the above-mentioned deadline conditions for resending the discovery request message. For example, after a preset number of resendings, if a suitable side positioning server terminal device still cannot be found or selected, the discovery request message can be stopped. For another example, after a preset time period of resendings, if a suitable side positioning server terminal device still cannot be found or selected, the discovery request message can be stopped. For another example, after the first terminal device keeps resending until it finds or selects a suitable side positioning server terminal device, the discovery request message can be stopped.

[0203] In some implementations, the positioning QoS includes a first association between a positioning QoS index and a positioning QoS parameter. The present embodiment does not specifically limit the type of positioning QoS parameter. For example, the positioning QoS parameter may include one or more of the following: horizontal accuracy; vertical accuracy; and response latency.

[0204] The first association relationship can be presented in a table or other manner. Table 1 shows a possible implementation of the first association relationship. As can be seen from Table 1, if the QoS index is 1, the associated QoS parameters include a horizontal accuracy of 5m, a vertical accuracy of 5m, and a response time of 0.5 seconds. If the QoS index is 2, the associated QoS parameters include a horizontal accuracy of 1m, a vertical accuracy of 1m, and a response time of 1 second.

[0205] Table 1

[0206] In some implementations, the positioning QoS index may have a second association with the positioning method. As previously described, the positioning QoS index has a first association with the positioning QoS parameter. Therefore, in this embodiment, the positioning method and positioning QoS parameter are also associated through the positioning QoS index. Furthermore, in some embodiments, the positioning method associated with the positioning QoS index may satisfy the QoS parameter associated with the positioning QoS index.

[0207] As shown in Table 2, if the QoS index is 1, the associated QoS parameters include a horizontal accuracy of 5m, a vertical accuracy of 5m, and a response time of 0.5 seconds. In addition, the positioning method associated with QoS index 1 is an arrival angle-based positioning method, which means that the positioning accuracy of the arrival angle-based positioning method can meet the QoS parameters associated with QoS index 1. If the QoS index is 2, the associated QoS parameters include a horizontal accuracy of 1m, a vertical accuracy of 1m, and a response time of 1 second. In addition, the positioning method associated with QoS index 2 is a round-trip delay-based positioning method, which means that the positioning accuracy of the round-trip delay-based positioning method can meet the QoS parameters associated with QoS index 2.

[0208] Table 2

[0209] It should be noted that the first association relationship and the second association relationship can be represented by a single table (such as Table 2). Alternatively, in other embodiments, the first association relationship and the second association relationship can be represented by multiple tables, and the multiple tables can have the same positioning QoS index, thereby associating the multiple tables together.

[0210] In some implementations, the positioning QoS index may be carried in the first discovery message, thereby simultaneously indicating the QoS parameters associated with the QoS index and the positioning method, which helps reduce the overhead required to transmit the positioning method and QoS parameters.

[0211] As previously mentioned, the QoS parameters may include an LCS QoS class. The LCS QoS class may be used to indicate the degree to which the LCS service adheres to the QoS parameters. In some implementations, the LCS QoS class may include one of the following: best effort class, multiple QoS classes, and assured class.

[0212] For ease of understanding, the following introduces the first association relationship and the second association relationship of another embodiment of the present application in conjunction with Table 3. As shown in Table 3, if the QoS index is 1, the associated QoS parameters include a horizontal accuracy of 5m; a vertical accuracy of 5m and a response time of 0.5 seconds. In addition, the positioning method associated with QoS index 1 is a positioning method based on the angle of arrival, that is, the positioning accuracy of the positioning method based on the angle of arrival can meet the QoS parameters associated with QoS index 1. If the QoS index is 2, the associated QoS parameters include a horizontal accuracy of 1m; a vertical accuracy of 1m and a response time of 1 second. In addition, the positioning method associated with QoS index 2 is a positioning method based on round-trip delay, that is, the positioning accuracy of the positioning method based on round-trip delay can meet the QoS parameters associated with QoS index 2. In addition, the QoS parameters associated with the positioning QoS index can also include an LCS QoS level, which is used to indicate the degree of compliance of the LCS service with the QoS parameters.

[0213] Table 3

[0214] In some implementations, the positioning QoS associated with the above-mentioned first information can be used to discover or select a side positioning server terminal device. In other scenarios, the first terminal device may also send a positioning QoS for discovering or selecting an anchor terminal. For ease of distinction, the positioning QoS used to discover or select a side positioning server terminal device is referred to as "positioning QoS1", and the positioning QoS used to discover or select an anchor terminal device is referred to as "positioning QoS2". In some implementations, the above-mentioned positioning QoS1 may be different from positioning QoS2. For example, positioning QoS1 may include a positioning method in order to discover or select a side positioning server terminal device that supports the positioning algorithm. Accordingly, positioning QoS2 may not include a positioning method, and in this case, the anchor terminal device may not be required to support the positioning algorithm. Of course, in an embodiment of the present application, the above-mentioned positioning QoS1 may be the same as positioning QoS2.

[0215] In some embodiments, the first terminal device may send the fifth information, and correspondingly, the second terminal device receives the fifth information. The fifth information is used for authentication of ranging / side positioning, and the fifth information includes positioning QoS and / or positioning method. By carrying the fifth information, the authentication result can be made more accurate. The transmission process of the fifth information and the transmission process of the first information to the fourth information mentioned above can be independent of each other or combined with each other. For example, in some implementations, the first terminal device and the second terminal device may only exchange the first information to the fourth information mentioned above, without exchanging the fifth information. For another example, in some implementations, the first terminal device and the second terminal device may only exchange the fifth information, without exchanging the first information to the fourth information mentioned above. For another example, in some implementations, the first terminal device and the second terminal device may exchange both the fifth information and the first information to the fourth information mentioned above.

[0216] In the embodiment of the present application, the specific type of the fifth information is not limited. For example, the fifth information may be a non-access stratum (NAS) message.

[0217] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 11. The device embodiment of the present application is described in detail below in conjunction with Figures 12 to 14. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0218] FIG12 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 1200 shown in FIG12 is a first terminal device. The terminal device 1200 includes: a communication unit 1210.

[0219] The communication unit 1210 is configured to send a first discovery message, where the first discovery message includes first information; wherein the first information is associated with one or more of the following: positioning service quality QoS; and positioning terminal equipment.

[0220] In a possible implementation, the first discovery message is a discovery notification message, and the first information is used to indicate positioning QoS information and / or positioning terminal devices supported by the first terminal device.

[0221] In a possible implementation, the first discovery message is a discovery request message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device required by the first terminal device.

[0222] In a possible implementation, the discovery request message further includes second information, where the second information is used to indicate that a sideline positioning server terminal device needs to be discovered or selected.

[0223] In one possible implementation, the communication unit is also used to: receive a discovery response message sent by a second terminal device, the discovery response message including third information, the third information being used to indicate one or more of the following: the second terminal device supports the positioning QoS information and / or positioning terminal device required by the first terminal device; and the second terminal device is capable of serving as a side positioning server terminal device.

[0224] In one possible implementation, the third information includes a first bit, and when the value of the first bit is a first value, the first bit is used to indicate that the second terminal device can serve as a side positioning server terminal device; and / or when the value of the first bit is a second value, the first bit is used to indicate that the second terminal device cannot serve as a side positioning server terminal device, wherein the first value is different from the second value.

[0225] In a possible implementation, the first discovery message is a discovery response message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device supported by the first terminal device.

[0226] In one possible implementation, the communication unit is also used to: receive a discovery request message sent by the second terminal device before the first terminal device sends the first discovery message, and the discovery request message includes fourth information, and the fourth information is used to indicate that a side positioning server terminal device needs to be discovered or selected.

[0227] In a possible implementation, the first discovery message is a discovery message sent during a discovery or selection process of an anchor terminal device.

[0228] In a possible implementation manner, the first discovery message is a discovery message sent during a discovery or selection process of a side positioning server terminal device.

[0229] In one possible implementation, the positioning QoS includes positioning QoS parameters, and the positioning QoS parameters include one or more of the following: vertical accuracy; horizontal accuracy; response delay; positioning service LCS QoS level; and / or the positioning QoS includes: a first association relationship between a positioning QoS index and a positioning QoS parameter.

[0230] In a possible implementation manner, the positioning QoS index has a second association relationship with the positioning method.

[0231] In a possible implementation, the communication unit is further used to: send fifth information, where the fifth information is used for authentication of ranging / sidetrack positioning, and the fifth information includes the positioning QoS and / or the positioning method.

[0232] FIG13 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 1300 shown in FIG13 may be a second terminal device, and the terminal device 1300 includes: a communication unit 1310 .

[0233] The communication unit 1310 is configured to receive a first discovery message, where the first discovery message includes first information; wherein the first information is associated with one or more of the following: positioning service quality QoS; and positioning terminal equipment.

[0234] In a possible implementation, the first discovery message is a discovery notification message, and the first information is used to indicate positioning QoS information and / or positioning terminal devices supported by the first terminal device.

[0235] In a possible implementation, the first discovery message is a discovery request message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device required by the first terminal device.

[0236] In a possible implementation, the discovery request message further includes second information, where the second information is used to indicate that a sideline positioning server terminal device needs to be discovered or selected.

[0237] In one possible implementation, the communication unit is also used to: send a discovery response message to the first terminal device, the discovery response message including third information, the third information being used to indicate one or more of the following: the second terminal device supports the positioning QoS information and / or positioning terminal device required by the first terminal device; and the second terminal device is capable of serving as a side positioning server terminal device.

[0238] In one possible implementation, the third information includes a first bit, and when the value of the first bit is a first value, the first bit is used to indicate that the second terminal device can serve as a side positioning server terminal device; and / or when the value of the first bit is a second value, the first bit is used to indicate that the second terminal device cannot serve as a side positioning server terminal device, wherein the first value is different from the second value.

[0239] In a possible implementation, the first discovery message is a discovery response message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device supported by the first terminal device.

[0240] In one possible implementation, the communication unit is also used to: before the second terminal device receives the first discovery message, send a discovery request message to the first terminal device, and the discovery request message includes fourth information, and the fourth information is used to indicate that a side positioning server terminal device needs to be discovered or selected.

[0241] In a possible implementation, the first discovery message is a discovery message sent during a discovery or selection process of an anchor terminal device.

[0242] In a possible implementation manner, the first discovery message is a discovery message sent during a discovery or selection process of a side positioning server terminal device.

[0243] In one possible implementation, the positioning QoS includes positioning QoS parameters, and the positioning QoS parameters include one or more of the following: vertical accuracy; horizontal accuracy; response delay; positioning service LCS QoS level; and / or the positioning QoS includes: a first association relationship between a positioning QoS index and a positioning QoS parameter.

[0244] In a possible implementation manner, the positioning QoS index has a second association relationship with the positioning method.

[0245] In a possible implementation, the communication unit is further used to: receive fifth information, where the fifth information is used for authentication of ranging / sidetrack positioning, and the fifth information includes the positioning QoS and / or the positioning method.

[0246] In an optional embodiment, the communication unit 1210 may be a transceiver 1430. The terminal device 1200 may further include a processor 1410 and a memory 1420, as specifically shown in FIG14 .

[0247] In an optional embodiment, the communication unit 1310 may be a transceiver 1430. The terminal device 1300 may further include a processor 1410 and a memory 1420, as specifically shown in FIG14 .

[0248] Figure 14 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 14 indicate that the unit or module is optional. Device 1400 may be used to implement the method described in the above method embodiment. Device 1400 may be a chip, a terminal device, or a network device.

[0249] The device 1400 may include one or more processors 1410. The processor 1410 may support the device 1400 to implement the method described in the method embodiment above. The processor 1410 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0250] The apparatus 1400 may further include one or more memories 1420. The memories 1420 store programs that can be executed by the processor 1410, causing the processor 1410 to perform the methods described in the above method embodiments. The memories 1420 may be independent of the processor 1410 or integrated into the processor 1410.

[0251] The apparatus 1400 may further include a transceiver 1430. The processor 1410 may communicate with other devices or chips via the transceiver 1430. For example, the processor 1410 may transmit and receive data with other devices or chips via the transceiver 1430.

[0252] The present invention also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device according to the present invention, and the program enables a computer to execute the method executed by the terminal device according to the various embodiments of the present invention.

[0253] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal device according to the present application, and the program causes a computer to execute the method performed by the terminal device according to each embodiment of the present application.

[0254] The embodiments of the present application also provide a computer program that can be applied to the terminal device of the embodiments of the present application, and the computer program enables a computer to execute the method executed by the terminal device in each embodiment of the present application.

[0255] In an embodiment of the present application, any of the information mentioned above can be carried by one or more of unicast messages, multicast messages and broadcast messages.

[0256] Unicast messages can be understood as one-to-one transmissions, meaning they are sent from one sender to one receiver. The source delivers unicast messages over a unicast channel, and only devices or network equipment allocated the corresponding unicast resources can attempt to receive them. Unicast messages are also called dedicated signaling.

[0257] The multicast message described above can be understood as a one-to-many transmission, meaning it's sent from a single sender to multiple receivers. The source transmits the message via a multicast channel. Terminal devices or network devices within the multicast signal's coverage area and that are members of the group can attempt to receive the message. When a terminal device or network device joins a group, it acquires multicast channel resources.

[0258] The broadcast message can be understood as a message transmitted from one sender to any receiver. The source transmits the message via a broadcast channel, and any terminal or network device within the coverage area of ​​the broadcast signal can attempt to receive it.

[0259] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0260] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0261] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0262] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0263] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0264] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0265] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0266] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0267] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0268] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0269] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0270] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0271] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A side communication method, characterized in that: include: The first terminal device sends a first discovery message, where the first discovery message includes first information; The first information is associated with one or more of the following: Positioning Quality of Service (QoS); and Positioning method.

2. The method according to claim 1, characterized in that The first discovery message is a discovery notification message, and the first information is used to indicate the positioning QoS information and / or positioning method supported by the first terminal device.

3. The method according to claim 1, characterized in that The first discovery message is a discovery request message, and the first information is used to indicate the positioning QoS information and / or positioning method required by the first terminal device.

4. The method according to claim 3, characterized in that: The discovery request message also includes second information, where the second information is used to indicate that a sideline positioning server terminal device needs to be discovered or selected.

5. The method according to claim 3 or 4, characterized in that: The method further comprises: The first terminal device receives a discovery response message sent by the second terminal device, where the discovery response message includes third information, where the third information is used to indicate one or more of the following: The second terminal device supports the positioning QoS information and / or positioning method required by the first terminal device; and The second terminal device can serve as a sideline positioning server terminal device.

6. The method according to claim 5, characterized in that The third information includes a first bit, and when the value of the first bit is a first value, the first bit is used to indicate that the second terminal device can serve as a side positioning server terminal device; and / or When the value of the first bit is a second value, the first bit is used to indicate that the second terminal device cannot be used as a side positioning server terminal device, wherein the first value is different from the second value.

7. The method according to claim 1, characterized in that The first discovery message is a discovery response message, and the first information is used to indicate the positioning QoS information and / or positioning method supported by the first terminal device.

8. The method according to claim 7, characterized in that Before the first terminal device sends the first discovery message, the method further includes: The first terminal device receives a discovery request message sent by the second terminal device, where the discovery request message includes fourth information, and the fourth information is used to indicate that a side positioning server terminal device needs to be discovered or selected.

9. The method according to any one of claims 1 to 8, characterized in that The first discovery message is a discovery message sent during the discovery or selection process of the anchor terminal device.

10. The method according to any one of claims 1 to 8, characterized in that The first discovery message is a discovery message sent during the discovery or selection process of the side positioning server terminal device.

11. The method according to any one of claims 1 to 10, characterized in that The positioning QoS includes positioning QoS parameters, and the positioning QoS parameters include one or more of the following: vertical accuracy; Horizontal accuracy; Response delay: Location service LCS QoS level; and / or The positioning QoS includes: a first association relationship between a positioning QoS index and a positioning QoS parameter.

12. The method according to claim 11, characterized in that The positioning QoS index has a second association relationship with the positioning method.

13. The method according to any one of claims 1 to 12, characterized in that The method further comprises: The first terminal device sends fifth information, where the fifth information is used for authentication of ranging / sideline positioning, and the fifth information includes the positioning QoS and / or the positioning method.

14. A side communication method, characterized in that: include: The second terminal device receives a first discovery message, where the first discovery message includes first information; The first information is associated with one or more of the following: Positioning Quality of Service (QoS); and Positioning method.

15. The method according to claim 14, characterized in that The first discovery message is a discovery notification message, and the first information is used to indicate the positioning QoS information and / or positioning method supported by the first terminal device.

16. The method according to claim 14, characterized in that The first discovery message is a discovery request message, and the first information is used to indicate the positioning QoS information and / or positioning method required by the first terminal device.

17. The method according to claim 16, characterized in that The discovery request message also includes second information, where the second information is used to indicate that a sideline positioning server terminal device needs to be discovered or selected.

18. The method according to claim 16 or 17, characterized in that The method further comprises: The second terminal device sends a discovery response message to the first terminal device, where the discovery response message includes third information, where the third information is used to indicate one or more of the following: The second terminal device supports the positioning QoS information and / or positioning method required by the first terminal device; and The second terminal device can serve as a sideline positioning server terminal device.

19. The method according to claim 18, characterized in that The third information includes a first bit, and when the value of the first bit is a first value, the first bit is used to indicate that the second terminal device can serve as a side positioning server terminal device; and / or When the value of the first bit is a second value, the first bit is used to indicate that the second terminal device cannot be used as a side positioning server terminal device, wherein the first value is different from the second value.

20. The method according to claim 14, characterized in that The first discovery message is a discovery response message, and the first information is used to indicate the positioning QoS information and / or positioning method supported by the first terminal device.

21. The method according to claim 20, characterized in that Before the second terminal device receives the first discovery message, the method further includes: The second terminal device sends a discovery request message to the first terminal device, where the discovery request message includes fourth information, and the fourth information is used to indicate that a side positioning server terminal device needs to be discovered or selected.

22. The method according to any one of claims 14 to 21, characterized in that The first discovery message is a discovery message sent during the discovery or selection process of the anchor terminal device.

23. The method according to any one of claims 14 to 21, characterized in that The first discovery message is a discovery message sent during the discovery or selection process of the side positioning server terminal device.

24. The method according to any one of claims 14 to 23, characterized in that The positioning QoS includes positioning QoS parameters, and the positioning QoS parameters include one or more of the following: vertical accuracy; Horizontal accuracy; Response delay: Location service LCS QoS level; and / or The positioning QoS includes: a first association relationship between a positioning QoS index and a positioning QoS parameter.

25. The method according to claim 24, characterized in that The positioning QoS index has a second association relationship with the positioning method.

26. The method according to any one of claims 14 to 25, characterized in that The method further comprises: The second terminal device receives fifth information, where the fifth information is used for authentication of ranging / sideline positioning, and the fifth information includes the positioning QoS and / or the positioning method.

27. A terminal device, the terminal device being a first terminal device, characterized in that: include: A communication unit, configured to send a first discovery message, wherein the first discovery message includes first information; The first information is associated with one or more of the following: Positioning Quality of Service (QoS); and Locate terminal equipment.

28. The terminal device according to claim 27, characterized in that: The first discovery message is a discovery notification message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device supported by the first terminal device.

29. The terminal device according to claim 27, characterized in that: The first discovery message is a discovery request message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device required by the first terminal device.

30. The terminal device according to claim 29, characterized in that: The discovery request message also includes second information, where the second information is used to indicate that a sideline positioning server terminal device needs to be discovered or selected.

31. The terminal device according to claim 29 or 30, characterized in that: The communication unit is also used for: A discovery response message sent by a second terminal device is received, where the discovery response message includes third information, where the third information is used to indicate one or more of the following: The second terminal device supports the positioning QoS information and / or positioning terminal device required by the first terminal device; and The second terminal device can serve as a sideline positioning server terminal device.

32. The method according to claim 31, characterized in that The third information includes a first bit, and when the value of the first bit is a first value, the first bit is used to indicate that the second terminal device can serve as a side positioning server terminal device; and / or When the value of the first bit is a second value, the first bit is used to indicate that the second terminal device cannot be used as a side positioning server terminal device, wherein the first value is different from the second value.

33. The terminal device according to claim 27, characterized in that: The first discovery message is a discovery response message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device supported by the first terminal device.

34. The terminal device according to claim 33, characterized in that: The communication unit is also used for: Before the first terminal device sends the first discovery message, a discovery request message sent by the second terminal device is received, where the discovery request message includes fourth information, and the fourth information is used to indicate that a side positioning server terminal device needs to be discovered or selected.

35. The terminal device according to any one of claims 27 to 34, characterized in that: The first discovery message is a discovery message sent during the discovery or selection process of the anchor terminal device.

36. The terminal device according to any one of claims 27 to 34, characterized in that: The first discovery message is a discovery message sent during the discovery or selection process of the side positioning server terminal device.

37. The terminal device according to any one of claims 27 to 36, characterized in that: The positioning QoS includes positioning QoS parameters, and the positioning QoS parameters include one or more of the following: vertical accuracy; Horizontal accuracy; Response delay: Location service LCS QoS level; and / or The positioning QoS includes: a first association relationship between a positioning QoS index and a positioning QoS parameter.

38. The terminal device according to claim 37, characterized in that: The positioning QoS index has a second association relationship with the positioning method.

39. The terminal device according to any one of claims 27 to 38, characterized in that: The communication unit is also used for: Send fifth information, where the fifth information is used for authentication of ranging / sideline positioning, and the fifth information includes the positioning QoS and / or the positioning method.

40. A terminal device, the terminal device being a second terminal device, characterized in that: include: A communication unit, configured to receive a first discovery message, wherein the first discovery message includes first information; The first information is associated with one or more of the following: Positioning Quality of Service (QoS); and Locate terminal equipment.

41. The terminal device according to claim 40, characterized in that: The first discovery message is a discovery notification message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device supported by the first terminal device.

42. The terminal device according to claim 40, characterized in that: The first discovery message is a discovery request message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device required by the first terminal device.

43. The terminal device according to claim 42, characterized in that: The discovery request message also includes second information, where the second information is used to indicate that a sideline positioning server terminal device needs to be discovered or selected.

44. The terminal device according to claim 42 or 43, characterized in that: The communication unit is also used for: Send a discovery response message to the first terminal device, where the discovery response message includes third information, where the third information is used to indicate one or more of the following: The second terminal device supports the positioning QoS information and / or positioning terminal device required by the first terminal device; and The second terminal device can serve as a sideline positioning server terminal device.

45. The method according to claim 44, characterized in that The third information includes a first bit, and when the value of the first bit is a first value, the first bit is used to indicate that the second terminal device can serve as a side positioning server terminal device; and / or When the value of the first bit is a second value, the first bit is used to indicate that the second terminal device cannot be used as a side positioning server terminal device, wherein the first value is different from the second value.

46. ​​The terminal device according to claim 40, characterized in that: The first discovery message is a discovery response message, and the first information is used to indicate the positioning QoS information and / or positioning terminal device supported by the first terminal device.

47. The terminal device according to claim 46, characterized in that: The communication unit is also used for: Before the second terminal device receives the first discovery message, a discovery request message is sent to the first terminal device, where the discovery request message includes fourth information, and the fourth information is used to indicate that a side positioning server terminal device needs to be discovered or selected.

48. The terminal device according to any one of claims 40 to 47, characterized in that: The first discovery message is a discovery message sent during the discovery or selection process of the anchor terminal device.

49. The terminal device according to any one of claims 40 to 47, characterized in that: The first discovery message is a discovery message sent during the discovery or selection process of the side positioning server terminal device.

50. The terminal device according to any one of claims 40 to 49, characterized in that: The positioning QoS includes positioning QoS parameters, and the positioning QoS parameters include one or more of the following: vertical accuracy; Horizontal accuracy; Response delay: Location service LCS QoS level; and / or The positioning QoS includes: a first association relationship between a positioning QoS index and a positioning QoS parameter.

51. The terminal device according to claim 50, characterized in that: The positioning QoS index has a second association relationship with the positioning method.

52. The terminal device according to any one of claims 40 to 51, characterized in that: The communication unit is also used for: Receive fifth information, where the fifth information is used for authentication of ranging / sideline positioning, and the fifth information includes the positioning QoS and / or the positioning method.

53. A terminal device, characterized in that: It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal executes the method as described in any one of claims 1 to 13 or 14 to 26.

54. A device, characterized in that The device comprises a processor for calling a program from a memory so as to cause the device to execute the method as claimed in any one of claims 1 to 13 or 14 to 26.

55. A chip, characterized in that: The device comprises a processor, configured to call a program from a memory so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 13 or 14 to 26.

56. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 13 or 14 to 26.

57. A computer program product, characterized in that A program is included, which causes a computer to execute the method as claimed in any one of claims 1 to 13 or 14 to 26.

58. A computer program, characterized in that The computer program causes a computer to execute the method of any one of claims 1 to 13 or 14 to 26.

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