Lateral communication method, terminal device and network device

Abstract

The invention provides a sidewalk communication method, terminal equipment and network equipment. The method comprises the following steps: according to a target candidate starting symbol, the terminal equipment determines a symbol used for measuring a sideward received signal field intensity indicator (SL) RSSI in a first time slot; the symbols used to measure the SL RSSI in the first time slot may be determined based on the situation of the candidate starting symbol. Therefore, SL RSSI measurement abnormity caused by setting of the candidate starting symbol can be avoided, and thus side transmission is prevented from being influenced by a candidate starting symbol mechanism.

Description

Method, terminal device and network device for sideline communication Technical Field

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

[0002] In some communication systems, the candidate start symbol mechanism can increase the success rate of terminal devices accessing channels in unlicensed spectrum, or improve the terminal device's ability to compete for channels with terminals of other systems. Under the candidate start symbol mechanism, sideline communications may be affected to a certain extent.

[0003] Summary of the Invention

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

[0005] In a first aspect, a method for sidelink communication is provided, comprising: based on a target candidate starting symbol, a terminal device determines a symbol for measuring a sidelink received signal strength indicator (SL RSSI) in a first time slot.

[0006] In a second aspect, a method for sideline communication is provided, comprising: a network device sending a first parameter; wherein the first parameter is used to determine a target candidate starting symbol, and the target candidate starting symbol is used to determine a symbol for measuring SL RSSI in a first time slot.

[0007] According to a third aspect, a terminal device is provided, including: a determining unit, configured to determine a symbol for measuring SL RSSI in a first time slot according to a target candidate starting symbol.

[0008] In a fourth aspect, a network device is provided, including: a first sending unit, configured to send a first parameter; wherein the first parameter is used to determine a target candidate starting symbol, and the target candidate starting symbol is used to determine a symbol for measuring SL RSSI in a first time slot.

[0009] In a fifth aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0010] In a sixth aspect, a network device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided in the embodiment of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program enables a terminal to execute part or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a terminal to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0014] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] The symbol used to measure the SL RSSI in the first time slot can be determined based on the candidate start symbol. Therefore, the present application can avoid SL RSSI measurement anomalies caused by setting the candidate start symbol, thereby preventing side transmission from being affected by the candidate start symbol mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0017] FIG2 is a diagram illustrating an application scenario of the sideline communication in the first mode.

[0018] FIG3 is a diagram illustrating an application scenario of the sideline communication in the second mode.

[0019] FIG4 is a diagram showing an example of a time slot structure for sideline communication.

[0020] FIG5 is an example diagram of a terminal device measuring a channel busy ratio (CBR).

[0021] FIG6 is another example diagram of a time slot structure for sideline communication.

[0022] FIG7 is a schematic flowchart of a method for sideline communication provided in an embodiment of the present application.

[0023] FIG8 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0024] FIG9 is a schematic structural diagram of a network device provided in an embodiment of the present application.

[0025] FIG10 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solution of this application will be described below in conjunction with the accompanying drawings. For ease of understanding, the following first introduces the terms and communication processes involved in this application.

[0027] Communication System

[0028] Figure 1 is an example diagram of a wireless communication system 100 to which an embodiment of the present application is applicable. The wireless communication system 100 may include one or more communication devices. The one or more communication devices may include, for example, a network device 110 and terminals 121 to 129. The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminals within the coverage area.

[0029] In some implementations, terminal devices can communicate with each other via sidelinks (SLs). Sidelink communication may also be referred to as proximity services (ProSe) communication, unilateral communication, sidelink communication, device-to-device (D2D) communication, or direct link communication. Vehicle-to-everything (V2X) systems can also be implemented using direct terminal-to-terminal communication (i.e., sidelink communication).

[0030] In some implementations, sidelink data may be 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), a sidelink synchronization signal block (S-SSB), etc., wherein the S-SSB includes a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), and a physical sidelink broadcast channel (PSBCH).

[0031] Unlike traditional cellular systems, where data is sent and received via network devices, sideline communication systems (such as the Internet of Vehicles) use direct device-to-device communication. As a result, sideline communication offers higher spectral efficiency and lower transmission latency.

[0032] The following describes several common sidelink communication scenarios using Figure 1. Sidelink communication can be categorized into three scenarios, depending on whether the terminal in the sidelink is within the coverage of the network device. Scenario 1: The terminal conducts sidelink communication within the coverage of the network device. Scenario 2: Some terminals conduct sidelink communication within the coverage of the network device. Scenario 3: The terminal conducts sidelink communication outside the coverage of the network device.

[0033] As shown in Figure 1, in scenario 1, terminals 121-122 can communicate via a sidelink, and terminals 121-122 are all within the coverage of network device 110, or in other words, terminals 121-122 are all within the coverage of the same network device 110. In this scenario, network device 110 can send configuration signaling to terminals 121-122, and accordingly, terminals 121-122 communicate via the sidelink based on the configuration signaling.

[0034] As shown in Figure 1, in scenario 2, terminals 123 and 124 can communicate via a sidelink, and terminal 123 is within the coverage of network device 110, while terminal 124 is outside the coverage of network device 110. In this scenario, terminal 123 receives configuration information from network device 110 and communicates via a sidelink based on the configuration of the configuration signaling. However, for terminal 124, since terminal 124 is outside the coverage of network device 110, it cannot receive the configuration information of network device 110. In this case, terminal 124 can obtain the configuration of the sidelink communication based on the configuration information according to pre-configuration and / or the configuration information sent by terminal 123 within the coverage area, so as to communicate with terminal 123 via the sidelink based on the obtained configuration.

[0035] In some cases, terminal 123 may send the above configuration information to terminal 124 via a physical sidelink broadcast channel (PSBCH) to configure terminal 124 to communicate via the sidelink.

[0036] As shown in Figure 1, in scenario 3, terminals 125-129 are all outside the coverage of network device 110 and cannot communicate with network device 110. In this case, the terminals can configure sidelink communication based on pre-configuration information.

[0037] In some cases, terminals 127-129 located outside the coverage area of ​​the network device can form a communication group, and the terminals 127-129 in the communication group can communicate with each other. In addition, terminal 127 in the communication group can serve as a central control node, also known as a cluster header (CH), and correspondingly, the terminals in other communication groups can be called "group members."

[0038] Terminal 127 as a CH may 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, receiving side transmission feedback information from group members; coordinating resources with other communication groups, etc.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The terminal 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 device, 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 terminal device can be used to act as a base station. For example, the terminal device can act as a scheduling entity that provides side data between terminal devices in V2X or D2D. For example, a cellular phone and a car communicate with each other using side data. The cellular phone and smart home devices communicate without relaying the communication signal through a base station.

[0043] 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, modem or 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), 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 device.

[0044] 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.

[0045] 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.

[0046] 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).

[0047] Sideline communication mode

[0048] Some standards or protocols (such as the 3rd Generation Partnership Project (3GPP)) define two sideline communication modes (or transmission modes): a first mode (mode-1) and a second mode (mode-2).

[0049] In the first mode, the resources of the terminal device (the resources mentioned in this application may also be referred to as transmission resources, such as time-frequency resources) are allocated by the network device. The terminal device can send data on the side link according to the resources allocated by the network device. The network device can allocate resources for single transmission to the terminal device, or allocate resources for semi-static transmission to the terminal device. This first mode can be applied to scenarios covered by network devices, such as the scenario shown in Figure 2. In the scenario shown in Figure 2, terminal device 221 and terminal device 222 are located within the network coverage of network device 210. Network device 210 can allocate resources used in the side transmission process to terminal device 221 and terminal device 222. As shown in Figure 2, the network device can grant (grant) via a downlink (DL) to allocate resources used in the side transmission process to terminal device 221 and terminal device 222, so that terminal device 221 and terminal device 222 can use the resources in the side link.

[0050] In some embodiments, the first mode may also be referred to as mode A.

[0051] In the second mode, the terminal device can autonomously select one or more resources in the resource pool (RP). Specifically, the terminal device can select transmission resources in the resource pool by listening, or select transmission resources in the resource pool by random selection. For example, in the scenario shown in Figure 3, the terminal device 321 is located within the network coverage. The terminal device 321 can autonomously select resources from the pre-configured resource pool for side transmission. Alternatively, the terminal device 321 can autonomously select one or more resources from the resource pool configured by the network device 310 for side transmission. It should be noted that if the terminal device 321 is outside the network coverage, the terminal device 321 can also use the second mode for resource selection. In some embodiments, the second mode may also be referred to as mode B.

[0052] Physical layer structure of sideline communication system

[0053] FIG4 is a diagram showing an example of a slot structure for some side-by-side communication systems (e.g., an NR-V2X system).

[0054] As shown in Figure 4, the first symbol in the time slot (for example, an orthogonal frequency division multiplexing (OFDM) symbol) is an automatic gain control (AGC) symbol. When the terminal device receives data, the receiving power can be adjusted in the AGC symbol, for example, to a power suitable for demodulation. When the terminal device sends data, the content of a symbol after the symbol can be repeatedly sent on the AGC symbol. PSCCH can be used to carry the first side control information. The first side control information mainly includes a domain related to resource listening. PSSCH can be used to carry data and second side control information. The second side control information mainly includes a domain related to data demodulation. In some embodiments, the time slot may also be configured with PSFCH resources. For example, the time slot may be configured with a PSFCH symbol as shown in Figure 4. Depending on the resource pool configuration, the PSFCH symbol may appear once every 1, 2 or 4 time slots. In some embodiments, when a time slot is not configured with PSFCH resources, the guard period (GP) symbol (also called gap (GAP) symbol) between PSSCH and PSFCH, the AGC symbol used to receive PSFCH, and the PSFCH symbol can all be used to carry PSSCH. Normally, the last symbol in a time slot is a GP symbol. In other words, the next symbol after the last symbol carrying PSSCH or PSFCH can be a GP symbol. The terminal device can perform transceiver conversion within the GP symbol without transmitting. When there are PSFCH resources in the time slot, there may also be GP symbols between the PSSCH symbol and the PSFCH symbol. This is because the terminal device may transmit on PSSCH and receive on PSFCH, which requires GP symbols for transceiver conversion.

[0055] SL RSSI measurement

[0056] SL RSSI can be defined as the linear average value of the received power on one or more subchannels within the symbols starting from the second symbol in the time slot. In some embodiments, the second symbol may be the second one of the symbols included in the time slot. Taking a time slot shown in Figure 4 as an example, in which 14 OFDM symbols are included, the 14 OFDM symbols are symbol 0 to symbol 13 in sequence, then the second symbol may be symbol 1. In some embodiments, the second symbol may be the second one of the symbols used for side transmission in the time slot. The side transmission may be, for example, PSCCH and / or PSSCH transmission. For example, according to the configuration of the network, symbols 3 to 13 in a time slot are used for side transmission, then the second symbol is symbol 4.

[0057] In some embodiments, within a time slot, the terminal device may measure the received power on one or more subchannels within each symbol starting from the second symbol, and average the received power corresponding to each symbol to obtain the SL RSSI. It is understood that the SL RSSI is the measurement result of one or more subchannels in the time domain corresponding to a time slot and in the frequency domain, or the SL RSSI is the measurement result of one or more subchannels within a time slot. Averaging is required between symbols within the time slot.

[0058] Continuing with Figure 4 as an example, assuming that all OFDM symbols in a time slot are used for sidelink transmission and that the frequency domain in Figure 4 corresponds to a subchannel, the SL RSSI can be the linear average of the received power measured on the subchannels from Symbols 1 to 12. Specifically, the SL RSSI is obtained by measuring the received power on the subchannels from Symbols 1 to 12 and taking the linear average of the received power corresponding to each symbol.

[0059] It should be noted that one subchannel may correspond to multiple physical resource blocks (PRBs) in the frequency domain. For example, one subchannel may correspond to multiple consecutive PRBs.

[0060] SL RSSI can be applied to various technologies. For example, SL RSSI can be applied to channel busy ratio (CBR) measurement.

[0061] CBR measurement

[0062] CBR is a basic measurement indicator used to support congestion control and is also one of the main applications of SL RSSI measurement.

[0063] The definition of CBR can be: the ratio of sub-channels with SL RSSI higher than the configured threshold to the total number of sub-channels in the resource pool within the CBR measurement window [nc,n-1]. Where c is equal to 100 or 100·2 μ time slots, μ is related to the subcarrier spacing. For example, the subcarrier spacings of 15kHz, 30kHz, 60kHz, and 120kHz may correspond to μ of 0, 1, 2, and 3, respectively.

[0064] It should be noted that the smallest scheduling unit in the time domain of the resource pool can be a time slot, and the smallest scheduling unit in the frequency domain can be a subchannel. For example, the frequency domain width of a subchannel may be 10, 12, 15, 20, 25, 50, 75, or 100 PRBs.

[0065] Figure 5 shows an example of a terminal device measuring CBR. In Figure 5, it is assumed that the resource pool used by the terminal device includes only two subchannels (subchannel 1 and subchannel 2). All time slots in Figure 5 belong to the resource pool used by the terminal device. The terminal device is about to transmit in time slot n and measures or counts the CBR in time slot nN. For CBR, if the SL RSSI measured by the terminal device on the four subchannels x, z, y, and u in time slot [nNc, nN-1] is greater than the configured threshold, then the CBR is 4 divided by the total number of subchannels in the resource pool used by the terminal device in time slot [nNc, nN-1]. N can be related to the processing capability of the terminal device.

[0066] Unlicensed spectrum communications

[0067] Sidelink communication technology can operate on unlicensed spectrum. In unlicensed spectrum, terminal devices can perform listen before talk (LBT) and can only access the channel for transmission after LBT is successful.

[0068] The specific classification of LBT can include type 1 and type 2. The following describes them separately.

[0069] In Type 1 LBT, the terminal device generates a random counter. If the monitored time slot is idle, the counter is decremented by 1; if it is busy, the counter remains unchanged. When the counter reaches 0, the terminal device can access the channel and transmit. If the counter reaches 0 and the communication device has no data to transmit, the terminal device does not need to regenerate the counter when it needs to send data. Instead, it performs a fixed-length LBT. If the fixed-length LBT succeeds, meaning the channel is idle for the specified duration, the terminal device can access the channel.

[0070] Type 2 LBT may include type 2A and type 2B.

[0071] In Type 2A LBT, a terminal device can monitor a channel for 25 microseconds (Tshort). If all the monitoring time slots within Tshort are idle, the terminal device can directly access the channel.

[0072] In Type 2B LBT, a communication device can monitor a channel for 16 microseconds (denoted as Tf). If all the monitoring time slots within Tf are idle, the terminal device can directly access the channel.

[0073] Candidate start symbol

[0074] As mentioned above, when sidelink communication technology operates on unlicensed spectrum, terminal devices need to perform LBT. Only when LBT is successful can they access the channel; otherwise, they cannot access the channel. In some communication systems (such as sidelink unlicensed (SL-U) systems), it is possible to consider improving the time slot structure by setting candidate start symbols, thereby increasing the success rate of terminal devices accessing the channel on the unlicensed spectrum or enhancing the terminal device's ability to compete for the channel with terminals of other systems (such as Wi-Fi terminals).

[0075] The mechanism of candidate start symbols can give terminal devices additional channel access opportunities. Some communication standards have adopted a mechanism for configuring up to two candidate start symbols in one time slot. For example, the terminal device can perform LBT before the first candidate start symbol (such as symbol 0). If the LBT is unsuccessful, the terminal device can still try LBT again before the second candidate start symbol (such as symbol 6). It can be seen that the terminal device can access and transmit from the first candidate start symbol to the end of the time slot, or it can access and transmit from the second candidate start symbol to the end of the time slot. Exemplarily, the structure of the time slot can be shown in Figure 6. Since the second candidate start symbol is set, compared with Figure 4, the second candidate start symbol in Figure 6 can correspond to an additional AGC symbol, that is, symbol 6 in Figure 6.

[0076] The applicant has discovered that the above-mentioned candidate start symbol mechanism may affect sideline communications. Specifically, the candidate start symbol mechanism may affect the measurement of SL RSSI. For example, the related art starts measuring from the second symbol and takes the average value to obtain the SL RSSI, that is, the measurement and calculation of the SL RSSI does not include the measurement within the AGC symbol corresponding to the first symbol. For the candidate start symbol mechanism, more AGC symbols may be introduced, which may lead to inaccurate S-RRSI measurement. For another example, under the candidate start symbol mechanism, the terminal device may start transmitting sideline data from the first candidate start symbol in the time slot, or it may start transmitting data from subsequent candidate start symbols. When the terminal device starts transmitting data from a candidate start symbol after the first candidate start symbol, if the terminal device performing the measurement still measures the SL RSSI from the second symbol, the measurement result will be low. Figure 6 is used as an example for explanation below. In Figure 6, some terminal devices start transmitting from symbol 0, and some terminal devices start transmitting from symbol 6. In this case, because some terminal devices do not transmit data on symbols 0-5, the terminal device performing the measurement cannot measure the received power on these symbols. This means that if the terminal device performing the measurement still calculates the SL RSSI based on the average value of symbols 1-12, the SL RSSI measurement result will be low.

[0077] This application proposes a method for sideline communication to address the above-mentioned issues. Figure 7 is a schematic flowchart of a method for sideline communication provided in an embodiment of this application. The method shown in Figure 7 can be performed by a terminal device and / or a network device. The method shown in Figure 7 can include step S710.

[0078] Step S710: Based on the target candidate starting symbol, the terminal device may determine a symbol for measuring the SL RSSI in the first time slot.

[0079] The symbol used to measure the SL RSSI can be determined based on the target candidate starting symbol. In other words, among the symbols in the first time slot, which or which symbols can be used to measure the SL RSSI can be determined based on the target candidate starting symbol. The target candidate starting symbol can be one of multiple candidate starting symbols in the first time slot. For example, the target candidate starting symbol can include the second candidate starting symbol in the first time slot.

[0080] Therefore, it can be seen that the symbol used to measure SL RSSI in the first time slot can be determined according to different situations of the candidate start symbol. Therefore, the present application can avoid the SL RSSI measurement anomaly caused by setting the candidate start symbol in the related art.

[0081] Some embodiments are provided below to illustrate a method in which a terminal device determines a symbol for measuring SL RSSI based on a target candidate starting symbol.

[0082] As an implementation method, the symbol used to measure the SL RSSI may not include the target candidate starting symbol. In other words, at least one symbol in the first time slot can be used to measure the SL RSSI, and the at least one symbol may not include the target candidate starting symbol. That is, one or some candidate starting symbols in the first time slot may not participate in the measurement of the SL RSSI. Continuing to illustrate with Figure 6 as an example. In Figure 6, the target candidate starting symbol may be the second candidate starting symbol, that is, symbol 6. The symbols used to measure the SL RSSI may not include symbol 6.

[0083] As mentioned above, the definition of SL RSSI is to measure and average from the second symbol in the time slot, that is, the symbol used to measure SL RSSI does not include the AGC symbol (the first symbol). For example, in Figure 4, the symbol used to measure SL RSSI does not include symbol 0 (the first symbol of the time slot). In the candidate starting symbol mechanism, an additional AGC symbol is introduced, that is, the AGC symbol corresponding to the candidate starting symbol. The present application proposes that when measuring SL RSSI, the measurement results within the additional AGC symbol are not counted, so that the measurement results of SL RSSI are more in line with communication requirements.

[0084] The symbols used to measure SL RSSI may begin with the second symbol in the first time slot. In some embodiments, the second symbol may be the second symbol in the first time slot. For example, if the first time slot includes 14 symbols, symbol 0 through symbol 13, the second symbol may be symbol 1. In some embodiments, the second symbol may be the second symbol in the first time slot used for sideline transmission. For example, if, based on network configuration, symbols 3 through 13 in the first time slot are used for sideline transmission, the second symbol may be symbol 4.

[0085] In some embodiments, whether the symbol used to measure the SL RSSI starts at the second symbol of the first time slot can be determined based on the sideline transmission situation. For example, when the terminal device detects the sideline transmission at the first candidate start symbol of the first time slot, the symbol used to measure the SL RSSI may start at the second symbol in the first time slot. Alternatively, when the terminal device does not detect the sideline transmission at the first candidate start symbol of the first time slot, the symbol used to measure the SL RSSI may not start at the second symbol in the first time slot.

[0086] It is understandable that the embodiments disclosed in the present application can be implemented separately or in combination. For example, the symbol used to measure the SL RSSI does not include the target candidate start symbol, and the symbol used to measure the SL RSSI starts at the second symbol of the first time slot. These two embodiments can be implemented in combination. As an implementation method, the SL RSSI can be defined as the linear average value of the received power on one or more subchannels starting from the second symbol in the first time slot, excluding the second candidate start symbol. For example, the terminal device measures the received power on one or more subchannels in each symbol except the second candidate start symbol starting from the above-mentioned second OFDM symbol, and takes the average of the received power corresponding to each symbol to obtain the SL RSSI.

[0087] The following description continues with the time slot shown in Figure 6 as the first time slot as an example. The target candidate starting symbol may be symbol 6 shown in Figure 6. In some embodiments, the second symbol in the first time slot may be symbol 1, and the symbols used for measuring SL RSSI in the first time slot may include symbols 1-5 and symbols 7-12. In some embodiments, the network configures symbols 3-13 in the first time slot for sidelink transmission, and the second symbol in the first time slot may be symbol 4. In this case, the symbols used for measuring SL RSSI in the first time slot may include symbol 4, symbol 5, and symbols 7-12.

[0088] The starting symbol for measuring SL RSSI may also be determined based on the target candidate starting symbol. For example, the first symbol may be the next symbol of the target candidate starting symbol. The symbols for measuring SL RSSI may start from the first symbol.

[0089] As an implementation method, SL RSSI can be defined as the linear average of the received power on one or more subchannels starting from the symbol following the target candidate start symbol in the first time slot. For example, the terminal device can determine the target candidate start symbol and measure the received power on one or more subchannels on each symbol starting from the symbol following the target candidate start symbol, and average the received power corresponding to each symbol.

[0090] The following description continues with the time slot shown in Figure 6 as the first time slot. In Figure 6, all OFDM symbols in the first time slot are used for sidelink transmission, and the example frequency domain in Figure 6 corresponds to one subchannel. The target candidate starting symbol is the second candidate starting symbol of the first time slot, that is, symbol 6. The SL RSSI is the linear average of the received power measured on the subchannels of symbols 7 to 12, that is, the received power is measured on the subchannels of symbols 7 to 12, and the linear average of the received power corresponding to each symbol is taken.

[0091] In some embodiments, if a first condition is met, the symbols used to measure the SL RSSI may begin at the first symbol. The first condition may include: no sideline transmission is detected at the first candidate start symbol of the first time slot, and / or sideline transmission is detected at the target candidate start symbol. It is understood that the SL RSSI measurement may begin at the candidate start symbol at which the terminal device begins sideline transmission.

[0092] Based on the present application, the symbols used to measure the SL RSSI may not include the symbols before the target candidate start symbol. Therefore, if the terminal device does not transmit data before the target candidate start symbol, the symbols before the target candidate start symbol may not be used to determine the SL RSSI, thereby avoiding the problem of low SL RSSI measurement results.

[0093] The target candidate start symbol is described in detail below.

[0094] As described above, the target candidate start symbol may include any candidate start symbol in the first time slot. In other words, any symbol that can be a candidate start symbol may be a target candidate start symbol.

[0095] As an implementation, the target candidate starting symbol may include the Nth symbol among the symbols included in the first time slot. The value of N may be 4, 5, 6, 7, or 8. For example, if the symbols included in the first time slot are symbol 0 to symbol 13, the target candidate starting symbol may be symbol 3, symbol 4, symbol 5, symbol 6, or symbol 7.

[0096] As another implementation, the target candidate starting symbol may include the Mth symbol among the symbols used for sidelink transmission in the first time slot. The value of M may be 4, 5, 6, 7, or 8. For example, the symbols included in the first time slot are symbol 0 through symbol 13. Among symbols 0 through 13, the symbols available for sidelink transmission are symbol 1 through symbol 13. The target candidate starting symbol may then be symbol 4, symbol 5, symbol 6, symbol 7, or symbol 8. It should be noted that the sidelink transmission may be PSCCH and / or PSSCH transmission.

[0097] In some embodiments, the target candidate starting symbol can be determined by one or more of the following methods: network device configuration, pre-configuration, terminal device self-determination, and protocol pre-definition. The following description takes the target candidate starting symbol as the second candidate starting symbol as an example. In some implementations, the protocol can predefine that the second candidate starting symbol is symbol 6 in the time slot, and the target candidate starting symbol can be symbol 6. In some implementations, the second candidate starting symbol can be symbol a (a can be an integer greater than 0), and the value of a can be determined based on network configuration or pre-configuration. For example, the network can configure a=6.

[0098] If the target candidate start symbol is determined by configuration, the method shown in FIG7 may include step S701.

[0099] In step S701, a terminal device receives a first parameter. The first parameter may be sent by a network device. That is, step S701 may include the network device sending the first parameter.

[0100] The first parameter can be used to configure the target candidate starting symbol. If the first parameter is sent by the network device, the network device can configure the target candidate starting symbol using the first parameter, or in other words, the network device can indicate the target candidate starting symbol using the first parameter. Optionally, the first parameter can be included in the following information: bandwidth part (BWP) configuration information and / or resource pool configuration information.

[0101] In some embodiments, the SL RSSI measurement method may be determined by one or more of the following methods: network device configuration, pre-configuration, terminal device self-determination, and protocol pre-definition. The SL RSSI measurement method may include the method for determining the symbol used to measure the SL RSSI described above. For example, the SL RSSI measurement method may include one or more of the following methods: the symbol used to measure the SL RSSI may not include the target candidate starting symbol, and the symbol used to measure the SL RSSI may start at the first symbol.

[0102] In some implementations, when the target candidate starting symbol is configured, the method for determining the symbol for measuring SL RSSI provided in the present application may be used. The following is an example of configuring the target candidate starting symbol through the first parameter. In some embodiments, when the first parameter is configured, the symbol used to measure SL RSSI may not include the target candidate starting symbol, and / or the symbol used to measure SL RSSI may start from the second symbol in the first time slot. In some embodiments, when the first parameter is configured, the symbol used to measure SL RSSI may start from the first symbol.

[0103] In some implementations, the SL RSSI measurement method can be configured using a second parameter. For example, the terminal device can receive the second parameter. The second parameter can be sent by a network device, i.e., the network device can send the second parameter. The terminal device can determine the SL RSSI measurement method based on the second parameter. Optionally, the second parameter can be included in the following information: BWP configuration information and / or resource pool configuration information.

[0104] In some embodiments, the measurement method of configuring SL RSSI based on the second parameter can be implemented in one or more of the following ways: when the second parameter is configured or not configured, the symbol used to measure SL RSSI may not include the target candidate starting symbol; when the second parameter is configured or not configured, the symbol used to measure SL RSSI may start from the second symbol in the first time slot; when the second parameter is configured or not configured, the symbol used to measure SL RSSI may start from the first symbol; when the second parameter is used to indicate the first symbol or the second symbol in the first time slot, the symbol used to measure SL RSSI may not include the target candidate starting symbol, and / or, the symbol used to measure SL RSSI starts from the second symbol in the first time slot; when the second parameter is used to indicate the target candidate starting symbol or the first symbol, the symbol used to measure SL RSSI may start from the first symbol; when the second parameter is the first value, the symbol used to measure SL RSSI may not include the target candidate starting symbol, and / or, the symbol used to measure SL RSSI may start from the second symbol in the first time slot; when the second parameter is the second value, the symbol used to measure SL RSSI may start from the first symbol.

[0105] It should be noted that the first time slot may be used for sideline transmission. For example, the first time slot may be used for transmitting PSCCH and / or PSSCH.

[0106] It should be noted that the embodiments provided in this application can be applied to scenarios where multiple candidate start symbols are configured in the first time slot. In some embodiments, when a candidate start symbol is configured in the first time slot or the candidate start symbol is enabled, multiple candidate start symbols can be configured in the first time slot, and the communication device can measure the SL RSSI according to the embodiments provided in this application. In some embodiments, when no PSFCH resource is configured in the first time slot, multiple candidate start symbols can be configured in the first time slot, and the communication device can measure the SL RSSI according to the embodiments provided in this application.

[0107] It should be noted that in this application, a subchannel can correspond to multiple PRBs in the frequency domain. For example, a subchannel can correspond to one or more comb resources, each of which contains multiple PRBs. The frequency domain spacing between multiple PRBs can be the same. As an implementation method, PRBs 1, 6, 11, and 16 can be used as a comb resource.

[0108] It should be noted that the symbols used to measure the SL RSSI may not include the GP symbol.

[0109] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 7 . The device embodiment of the present application is described in detail below in conjunction with Figures 8 to 10 . 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.

[0110] FIG8 is a schematic structural diagram of a terminal device 800 provided in an embodiment of the present application. The terminal device 800 may include a determining unit 810 .

[0111] The determining unit 810 is configured to determine a symbol for measuring the SL RSSI in the first time slot according to the target candidate starting symbol.

[0112] In some embodiments, the symbols used to measure the SL RSSI do not include the target candidate starting symbol.

[0113] In some embodiments, the next symbol of the target candidate starting symbol is the first symbol, and the symbols used to measure the SL RSSI start from the first symbol.

[0114] In some embodiments, the symbol used to measure SL RSSI starts from the first symbol when a first condition is met, and the first condition includes: no side transmission is detected in the first candidate starting symbol of the first time slot; and / or side transmission is detected in the target candidate starting symbol.

[0115] In some embodiments, if sideline transmission is detected at the first candidate start symbol of the first time slot, the symbol used to measure the SL RSSI starts at the second symbol in the first time slot.

[0116] In some embodiments, the target candidate starting symbol comprises a second candidate starting symbol of the first time slot.

[0117] In some embodiments, the target candidate start symbol is determined by one or more of the following ways: network device configuration, pre-configuration, self-determination by the terminal device, and protocol pre-definition.

[0118] In some embodiments, the terminal device 800 further includes: a first receiving unit for receiving a first parameter; wherein the first parameter is used to configure the target candidate starting symbol, and the first parameter is included in the following information: BWP configuration information and / or resource pool configuration information.

[0119] In some embodiments, the terminal device 800 further includes: a second receiving unit for receiving a second parameter; wherein the second parameter is used to configure the measurement method of the SL RSSI, and the second parameter is included in the following information: BWP configuration information and / or resource pool configuration information.

[0120] In some embodiments, the target candidate starting symbol includes the Nth symbol among the symbols included in the first time slot, and the value of N is: 4, 5, 6, 7 or 8.

[0121] In some embodiments, the target candidate starting symbol includes the Mth symbol among the symbols used for sideline transmission in the first time slot, and the value of M is: 4, 5, 6, 7 or 8.

[0122] In some embodiments, no physical sidelink feedback channel PSFCH resources are configured in the first time slot.

[0123] FIG9 is a schematic structural diagram of a network device 900 provided in an embodiment of the present application. The network device 900 may include a first sending unit 910 .

[0124] The first sending unit 910 is used to send a first parameter; wherein the first parameter is used to determine a target candidate starting symbol, and the target candidate starting symbol is used to determine a symbol for measuring SL RSSI in the first time slot.

[0125] In some embodiments, the network device 900 further includes: a second sending unit, configured to send a second parameter; wherein the second parameter is used to indicate a measurement method of the SL RSSI.

[0126] In an optional embodiment, the first sending unit 910, the second sending unit, the first receiving unit, and the second receiving unit may be a transceiver 1020, and the determining unit 810 may be a processor 1010, as shown in FIG10 .

[0127] Figure 10 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 10 indicate that the unit or module is optional. The device 1000 may be used to implement the method described in the above method embodiment. The device 1000 may be a chip, a terminal device, or a network device.

[0128] The device 1000 may include one or more processors 1010. The processor 1010 may support the device 1000 to implement the method described in the method embodiment above. The processor 1010 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.

[0129] The apparatus 1000 may further include one or more memories 1020. The memories 1020 store programs that can be executed by the processor 1010, causing the processor 1010 to perform the methods described in the above method embodiments. The memories 1020 may be independent of the processor 1010 or integrated into the processor 1010.

[0130] The apparatus 1000 may further include a transceiver 1030. The processor 1010 may communicate with other devices or chips via the transceiver 1030. For example, the processor 1010 may transmit and receive data with other devices or chips via the transceiver 1030.

[0131] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0132] 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 or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0133] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0134] 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.

[0135] 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.

[0136] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0137] In the embodiment of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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)).

[0146] 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 method for sideline communication, characterized in that include: Based on the target candidate starting symbol, the terminal device determines the symbol used to measure the sideline received signal strength indication SLRSSI in the first time slot.

2. The method according to claim 1, characterized in that The symbols used to measure the SL RSSI do not include the target candidate starting symbol.

3. The method according to claim 1, characterized in that The next symbol of the target candidate starting symbol is the first symbol, and the symbols used to measure the SL RSSI start from the first symbol.

4. The method according to claim 3, characterized in that When a first condition is met, the symbol for measuring the SL RSSI starts with the first symbol, where the first condition includes: No side transmission is detected at the first candidate start symbol of the first time slot; and / or A side transmission is detected at the target candidate start symbol.

5. The method according to claim 1 or 2, characterized in that If sideline transmission is detected at the first candidate start symbol of the first time slot, the symbol for measuring the SL RSSI starts at the second symbol in the first time slot.

6. The method according to any one of claims 1 to 5, characterized in that The target candidate start symbol includes the second candidate start symbol of the first time slot.

7. The method according to any one of claims 1 to 6, characterized in that The target candidate start symbol is determined by one or more of the following ways: network device configuration, pre-configuration, self-determination by the terminal device, and protocol pre-definition.

8. The method according to any one of claims 1 to 7, characterized in that Also includes: The terminal device receives a first parameter; The first parameter is used to configure the target candidate starting symbol, and the first parameter is included in the following information: configuration information of the bandwidth part BWP and / or configuration information of the resource pool.

9. The method according to any one of claims 1 to 8, characterized in that Also includes: The terminal device receives a second parameter; The second parameter is used to configure the measurement method of the SL RSSI, and the second parameter is included in the following information: BWP configuration information and / or resource pool configuration information.

10. The method according to any one of claims 1 to 9, characterized in that The target candidate starting symbol includes the Nth symbol among the symbols included in the first time slot, and the value of N is: 4, 5, 6, 7 or 8.

11. The method according to any one of claims 1 to 10, characterized in that The target candidate starting symbol includes the Mth symbol among the symbols used for sideline transmission in the first time slot, and the value of M is: 4, 5, 6, 7 or 8.

12. The method according to any one of claims 1 to 11, characterized in that No physical sidelink feedback channel PSFCH resource is configured in the first time slot.

13. A method for sideline communication, characterized in that include: The network device sends a first parameter; The first parameter is used to determine a target candidate starting symbol, and the target candidate starting symbol is used to determine a symbol used to measure a sideline received signal strength indication SL RSSI in the first time slot.

14. The method according to claim 13, characterized in that Also includes: The network device sends a second parameter; The second parameter is used to indicate a measurement method of the SL RSSI.

15. A terminal device, characterized in that: include: The determination unit is configured to determine, according to the target candidate starting symbol, a symbol for measuring a sideline received signal strength indication SL RSSI in the first time slot.

16. The terminal device according to claim 15, characterized in that The symbols used to measure the SL RSSI do not include the target candidate starting symbol.

17. The terminal device according to claim 15, characterized in that The next symbol of the target candidate starting symbol is the first symbol, and the symbols used to measure the SL RSSI start from the first symbol.

18. The terminal device according to claim 17, characterized in that When a first condition is met, the symbol for measuring the SL RSSI starts with the first symbol, where the first condition includes: No side transmission is detected at the first candidate start symbol of the first time slot; and / or A side transmission is detected at the target candidate start symbol.

19. The terminal device according to claim 15 or 16, characterized in that: If sideline transmission is detected at the first candidate start symbol of the first time slot, the symbol for measuring the SL RSSI starts at the second symbol in the first time slot.

20. The terminal device according to any one of claims 15 to 19, characterized in that: The target candidate start symbol includes the second candidate start symbol of the first time slot.

21. The terminal device according to any one of claims 15 to 20, characterized in that: The target candidate start symbol is determined by one or more of the following ways: network device configuration, pre-configuration, self-determination by the terminal device, and protocol pre-definition.

22. The terminal device according to any one of claims 15 to 21, characterized in that: Also includes: A first receiving unit, configured to receive a first parameter; The first parameter is used to configure the target candidate starting symbol, and the first parameter is included in the following information: configuration information of the bandwidth part BWP and / or configuration information of the resource pool.

23. The terminal device according to any one of claims 15 to 22, characterized in that: Also includes: A second receiving unit, configured to receive a second parameter; The second parameter is used to configure the measurement method of the SL RSSI, and the second parameter is included in the following information: BWP configuration information and / or resource pool configuration information.

24. The terminal device according to any one of claims 15 to 23, characterized in that: The target candidate starting symbol includes the Nth symbol among the symbols included in the first time slot, and the value of N is: 4, 5, 6, 7 or 8.

25. The terminal device according to any one of claims 15 to 24, characterized in that: The target candidate starting symbol includes the Mth symbol among the symbols used for sideline transmission in the first time slot, and the value of M is: 4, 5, 6, 7 or 8.

26. The terminal device according to any one of claims 15 to 25, characterized in that: No physical sidelink feedback channel PSFCH resource is configured in the first time slot.

27. A network device, characterized in that: include: A first sending unit, configured to send a first parameter; The first parameter is used to determine a target candidate starting symbol, and the target candidate starting symbol is used to determine a symbol used to measure a sideline received signal strength indication SL RSSI in the first time slot.

28. The network device according to claim 27, wherein: Also includes: A second sending unit, configured to send a second parameter; The second parameter is used to indicate a measurement method of the SL RSSI.

29. A terminal device, characterized in that: The terminal device comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so that the terminal device executes the method according to any one of claims 1 to 12.

30. A network device, characterized in that: The network device comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so as to enable the network device to execute the method according to claim 13 or 14.

31. A device, characterized in that The device comprises a processor configured to call a program from a memory so as to enable the device to execute the method according to any one of claims 1 to 14.

32. 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 the method according to any one of claims 1 to 14.

33. A computer-readable storage medium, characterized in that A program is stored thereon, and the program causes a computer to execute the method according to any one of claims 1 to 14.

34. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 14.

35. A computer program, characterized in that The computer program enables a computer to execute the method according to any one of claims 1 to 14.

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