Communication method, device, and storage medium

Abstract

A communication method, apparatus, and storage medium. The communication method applied to a first communication node includes: obtaining a carrier frequency configuration message, where the carrier frequency configuration message indicates a frequency domain resource mapping mode (S110); and determining, based on the frequency domain resource mapping mode, frequency domain resources used for a sidelink signal or channel (S120).

Description

Technical Field

[0001] This application relates to the field of communication technologies, for example, to communication methods, devices, and storage media.

Background Art

[0002] SideLink (SL) communication includes vehicle-to-everything (V2X) communication, direct communication between user equipments (UEs) (Device to Device, D2D), etc., and can operate in licensed spectra such as the Intelligent Traffic Systems (ITS) spectrum, or in unlicensed spectra. SL communication includes a synchronization process, a discovery process, a data transmission / reception process, an acknowledgement message (ACK) / negative acknowledgement message (NACK) feedback process, etc. In New Radio (NR) SL communication, the resources used for the Sidelink Synchronization Signal Block (S-SSB) are composed of 11 consecutive resource blocks (RBs) in the frequency domain and 14 symbols in the time domain. Each resource block contains 12 resource elements (REs) in the frequency domain. The resources used for the Physical Sidelink Control Channel (PSCCH) / Physical Sidelink Shared Channel (PSSCH) are composed of one or more sub-channels in the frequency domain and multiple symbols in the time domain. Usually, in order to access the system, a UE needs to blindly detect the S-SSB to know information such as the frame structure. However, due to the design of the single frame structure, the flexibility of the operation in the unlicensed carrier of SL is limited. How to design a flexible frequency domain resource mapping mode and the corresponding frame structure applied to the unlicensed Sidelink (SL-Unlicense, SL-U) so that SL-U can be easily and flexibly deployed in each area has become an urgent problem to be solved. Summary of the Invention Problems to be Solved by the Invention

[0003] Embodiments of the present application provide a communication method, device, and storage medium, realize a flexible frequency domain resource mapping mode applicable to SL-U, and make it easy for SL-U to be flexibly deployed in each region.

Means for Solving the Problem

[0004] Embodiments of the present application are communication methods applicable to a first communication node, acquire a carrier frequency configuration message, where the carrier frequency configuration message indicates a frequency domain resource mapping mode, and determine frequency domain resources used for sidelink signals or channels based on the frequency domain resource mapping mode, and provide a communication method.

[0005] Embodiments of the present application are communication methods applicable to a second communication node, including transmitting the dedicated system message or system broadcast message to the first communication node so that the first communication node acquires a corresponding carrier frequency configuration message based on the dedicated system message or system broadcast message, where the carrier frequency configuration message includes a frequency domain resource mapping mode for determining frequency domain resources used for sidelink signals or channels, and provide a communication method.

[0006] Embodiments of the present application are communication devices applicable to a first communication node, comprising an acquisition module configured to acquire a carrier frequency configuration message, where the carrier frequency configuration message is configured to indicate a frequency domain resource mapping mode, and a determination module configured to determine frequency domain resources used for sidelink signals or channels based on the frequency domain resource mapping mode, and provide a communication device.

[0007] Examples of the present application A communication device applied to a second communication node, a transmitter configured to transmit the dedicated system message or the system broadcast message to a first communication node so as to cause the first communication node to obtain a corresponding carrier frequency configuration message based on the dedicated system message or the system broadcast message, wherein the carrier frequency configuration message includes a frequency domain resource mapping mode for determining frequency domain resource used for a sidelink signal or a channel provide a communication device.

[0008] Examples of the present application comprising a memory and one or more processors, the memory is configured to store one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the communication method according to any of the above embodiments provide a communication device.

[0009] Examples of the present application store a computer program that, when executed by a processor, implements the communication method according to any of the above embodiments provide a storage medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0010]

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Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present application will be described with reference to the drawings. Hereinafter, the present application will be described in connection with the drawings of the embodiments, and the listed embodiments are only for interpreting the present application.

[0012] In one embodiment, FIG. 1 is a flowchart of a communication method according to an embodiment of the present application. This embodiment is applicable when setting a flexible frequency domain resource mapping mode applied to SL-U. This embodiment can be executed by a first communication node. As shown in FIG. 1, this embodiment includes S110 to S120.

[0013] In S110, obtain a carrier frequency configuration message.

[0014] The carrier frequency configuration message indicates a frequency domain resource mapping mode. Here, the carrier frequency configuration message means a configuration message for one carrier frequency used in SL communication, and is used to set the frequency domain resources of the SL signal or channel in the SL communication process. The frequency domain resource mapping mode is used to represent the mapping relationship between the frequency domain resources of the SL signal or channel and the frame structure.

[0015] In S120, based on the frequency domain resource mapping mode, determine the frequency domain resources used for the sidelink signal or channel.

[0016] A sidelink signal or channel means various signals or channels related to the SL communication process. In one embodiment, the sidelink signal or channel may include, but is not limited to, a sidelink side synchronization signal block (SideLink Synchronization Signal Block, S-SSB), a physical sidelink side control channel (Physical Sidelink Control Channel, PSCCH) / physical side sidelink side shared channel (Physical Sidelink Shared Channel, PSSCH), a physical sidelink side feedback channel (Physical Sidelink Feedback Channel, PSFCH), a sidelink channel state information-reference signal (SideLink Channel State Information-Reference Signal, SL CSI-RS), and a sidelink positioning reference signal (SideLink Positioning Reference Signal, SL PRS). Here, the S-SSB includes a SL primary synchronization signal (Primary Synchronization Signal, PSS), a SL secondary synchronization signal (Secondary Synchronization Signal, SSS), and a physical sidelink side broadcast channel (Physical Sidelink Broadcast Channel, PSBCH). In an embodiment, the PSCCH is used to bear SL control information (SCI), the PSSCH is used to bear the transmission of SL data, the PSFCH is used to bear hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) feedback information, the SL PRS is used to bear the SL positioning signal, and the SL CSI-RS is used to bear the SL channel measurement signal.

[0017] In an embodiment, the frequency-domain resource mapping mode may be a discrete mapping mode for frequency-domain resources or a continuous mapping mode for frequency-domain resources. In an embodiment, the first communication node determines the frequency-domain resources used for the SL signal or channel based on the frequency-domain resource mapping mode, and realizes flexible mapping of the frequency-domain resources to the SL-U.

[0018] In one embodiment, the bearer message of the carrier frequency configuration message includes one of a dedicated system message, a system broadcast message, and a pre-configuration message. Here, the dedicated system message means a system message that the second communication node specifically sends to one first communication node, and the system broadcast message means a system message that the second communication node broadcasts to a plurality of first communication nodes. In an example, the second communication node may send a dedicated system message or a system broadcast message to the first communication node and carry the carrier frequency configuration message in the dedicated system message or the system broadcast message. In an example, the carrier frequency configuration message may be obtained based directly on the pre-configuration message. Here, the pre-configuration message may be pre-stored by the device, set by upper-layer signaling, or obtained through negotiation between the first communication node and the second communication node, and is not limited thereto.

[0019] In one embodiment, obtaining the carrier frequency configuration message includes receiving a dedicated system message or a system broadcast message sent by the second communication node and obtaining the corresponding carrier frequency configuration message from the dedicated system message or the system broadcast message.

[0020] In an embodiment, when a carrier frequency configuration message is carried by a dedicated system message or a system broadcast message, the first communication node receives the dedicated system message or the system broadcast message transmitted by the second communication node, obtains a corresponding carrier frequency configuration message based on the dedicated system message or the system broadcast message, then determines a frequency domain resource mapping mode based on the carrier frequency configuration message, and determines frequency domain resources used for an SL signal or a channel based on the frequency domain resource mapping mode.

[0021] In one embodiment, the carrier frequency configuration message includes at least one of the frequency domain position of the sidelink synchronization signal block, the subcarrier spacing (SCS), the frequency domain resource mapping mode of the sidelink synchronization signal block, the frequency domain resource mapping mode of the sidelink signal or channel, the frequency domain resource mapping mode of the sidelink control channel and shared channel, the frequency domain resource mapping mode of the sidelink feedback channel, and the frequency domain resource mapping mode of the sidelink pilot signal. Here, the frequency domain position of the S-SSB means the position in the frequency domain resource of the S-SSB. In one example, only the frequency domain resource mapping mode of one or more of the SL signals or channels may be limited. In one example, the frequency domain resource mapping modes of all the SL signals or channels may be directly limited. In one example, when limiting the frequency domain resource mapping mode of one or more of the SL signals or channels (that is, setting the frequency domain resource mapping mode of the SL signal or channel individually), the carrier frequency configuration message may include at least one of the frequency domain resource mapping mode of the sidelink synchronization signal block, the frequency domain resource mapping mode of the sidelink control channel and shared channel, the frequency domain resource mapping mode of the sidelink feedback channel, and the frequency domain resource mapping mode of the sidelink pilot signal. In one example, when limiting the frequency domain resource mapping modes of all the SL signals or channels, the carrier frequency configuration message may include the frequency domain resource mapping mode of the SL signal or channel.

[0022] In one embodiment, the frequency domain resource mapping mode includes at least one of a frequency domain discrete resource mapping mode, a frequency domain continuous resource mapping mode, a mapping mode in which the sidelink synchronization signal block overlaps in the frequency domain with continuous frequency domain resources, and a frequency domain resource mapping mode that satisfies the requirement of the occupied channel bandwidth. Here, the frequency domain discrete resource mapping mode means that the frequency domain resources adopted by the SL signal or channel are discrete. The frequency domain continuous resource mapping mode means that the frequency domain resources adopted by the SL signal or channel are continuous. The mapping mode in which the S-SSB overlaps in the frequency domain with continuous frequency domain resources means that the frequency domain resources adopted by the SL signal or channel are discrete, but the frequency domain resources adopted by the S-SSB are continuous, and it means occupying a larger frequency domain bandwidth by means of overlapping mapping in the frequency domain. The frequency domain resource mapping mode that satisfies the requirement of the occupied channel bandwidth (OCB) means that the occupied frequency domain resources achieve the requirement of the OCB. For example, it occupies 80% of the bandwidth of one channel, but it means that the used frequency domain resources may be discrete. In one example, the frequency domain resource mapping mode may further include a frequency domain resource mapping mode that does not consider the requirement of the OCB. Here, the frequency domain resource mapping mode that does not consider the requirement of the OCB means a frequency domain resource mapping mode that does not consider whether the occupied frequency domain resources satisfy the requirement of the OCB. For example, it uses continuous frequency domain resources in the bandwidth part.

[0023] In one example, the frequency domain resource mapping mode of the sidelink synchronization signal block may include at least one of a frequency domain discrete resource mapping mode, a frequency domain continuous resource mapping mode, a mapping mode in which the sidelink synchronization signal block overlaps in the frequency domain with continuous frequency domain resources, and a frequency domain resource mapping mode that satisfies the requirement of the occupied channel bandwidth.

[0024] In one embodiment, the frequency domain resource mapping mode is indicated by the indication domain of the frequency domain resource mapping mode. In an embodiment, the frequency domain resource mapping mode of the SL signal or channel can be indicated by the indication domain of the frequency domain resource mapping mode. In one example, when the indication domain of the frequency domain resource mapping mode is empty or not set, the default frequency domain resource mapping mode can be directly adopted.

[0025] In one embodiment, the configuration granularity of the bearer message corresponding to the carrier frequency configuration message includes one of a carrier frequency, a carrier frequency list, a bandwidth part, a channel in a shared spectrum, a resource pool, and a resource block set. In one example, when the configuration granularity of the bearer message corresponding to the carrier frequency configuration message is a carrier frequency, the frequency domain resource mapping mode of the SL signal or channel in the current carrier is determined based on the carrier frequency configuration message at the current one carrier frequency. In one example, when the configuration granularity of the bearer message corresponding to the carrier frequency configuration message is a carrier frequency list, the frequency domain resource mapping mode of the SL signal or channel is determined based on the carrier frequency configuration messages at all carrier frequencies within the current one carrier frequency list. In one example, when the configuration granularity of the bearer message corresponding to the carrier frequency configuration message is a bandwidth part (BWP), the frequency domain resource mapping mode of the SL signal or channel in the current BWP is determined based on the carrier frequency configuration message in the BWP. In one example, when the configuration granularity of the bearer message corresponding to the carrier frequency configuration message is a channel in a shared spectrum, the frequency domain resource mapping mode of the SL signal or channel is determined based on the carrier frequency configuration message in the channel of the shared spectrum. In one example, when the configuration granularity of the bearer message corresponding to the carrier frequency configuration message is a resource pool, the frequency domain resource mapping mode of the SL signal or channel within the current resource pool is determined based on the carrier frequency configuration message corresponding to one resource pool. In one example, when the configuration granularity of the bearer message corresponding to the carrier frequency configuration message is a resource block set (RB Set), the frequency domain resource mapping mode of the SL signal or channel is determined based on the carrier frequency configuration message of the RB Set.

[0026] In one embodiment, the carrier frequency configuration message indicating the frequency domain resource mapping mode means that the carrier frequency configuration message includes indicating the frequency domain resource mapping mode of the sidelink synchronization signal block.

[0027] In one example, when the carrier frequency configuration message includes the frequency domain resource mapping mode of the SL signal or channel or S-SSB, the frequency domain resource mapping mode of the S-SSB can be directly identified and obtained from the carrier frequency configuration message.

[0028] In one embodiment, the carrier frequency configuration message indicating the frequency domain resource mapping mode means that the carrier frequency configuration message includes indicating the frequency domain resource mapping mode of the sidelink synchronization signal block, and determining the frequency domain resource mapping mode of other sidelink signals or channels based on the frequency domain resource mapping mode of the sidelink synchronization signal block. In one example, after determining the frequency domain resource mapping mode of the S-SSB, the frequency domain resource mapping mode of other SL signals or channels can be determined based on the frequency domain resource mapping mode of the S-SSB. In one example, other SL signals or channels include at least one of PSCCH, PSSCH, PSFCH, SL CSI-RS, and SL PRS.

[0029] In one embodiment, the frequency domain resource mapping mode of the sidelink synchronization signal block includes one of the frequency domain discrete resource mapping mode and the frequency domain resource mapping mode that satisfies the occupied channel bandwidth requirement, where some resource elements (REs) of the sidelink synchronization signal block are reserved resource elements, and the reserved resource elements are not mapped to any signal.

[0030] In an embodiment, when the frequency-domain resource mapping mode of the S-SSB is the frequency-domain discrete resource mapping mode or the frequency-domain resource mapping mode that satisfies the requirements of the OCB, some of the REs in the S-SSB are reserved REs, that is, some of the REs are not mapped to any signal for performing interval protection between the frequency-domain resources carrying data.

[0031] In one embodiment, the reserved resource element is one of each N resource elements at the highest frequency-domain position and / or the lowest frequency-domain position of each resource block in the synchronization signal block and each N resource elements at the highest frequency-domain position and / or the lowest frequency-domain position of each adjacent resource block group in the synchronization signal block, where N is a positive integer greater than or equal to 1.

[0032] The resource block group is composed of resource blocks that are continuous in at least two or more frequency domains. In an example, each N resource elements at the highest frequency-domain position and / or the lowest frequency-domain position of each resource block can be used as the reserved resource elements, that is, N resource elements are selected as the reserved REs at the highest frequency-domain position and / or the lowest frequency-domain position in each RB. In an example, each N resource elements at the highest frequency-domain position and / or the lowest frequency-domain position of each adjacent resource block group can also be used as the reserved resource elements, that is, N resource elements are selected as the reserved resource elements at the highest frequency-domain position and / or the lowest frequency-domain position of one resource block group.

[0033] In one embodiment, the carrier frequency configuration message indicating the frequency-domain resource mapping mode means that the carrier frequency configuration message includes indicating the frequency-domain resource mapping mode of the sidelink signal or channel.

[0034] In one example, when the SL signal or the frequency domain resource mapping mode of the channel is included in the carrier frequency configuration message, the frequency domain resource mapping mode of the SL signal or the channel can be obtained directly based on the carrier frequency configuration message.

[0035] In one embodiment, when the frequency domain resource mapping mode of the sidelink signal or channel at one carrier frequency is not indicated in the carrier frequency configuration message, the default frequency domain resource mapping mode of the sidelink signal or channel is used. For example, the default frequency domain resource mapping mode of the SL signal or channel is the frequency domain continuous resource mapping mode.

[0036] In one embodiment, FIG. 2 is a flowchart of another communication method according to an embodiment of the present application. This embodiment is applicable when setting a flexible frequency domain resource mapping mode applied to SL-U. This embodiment can be executed by a second communication node. As shown in FIG. 2, this embodiment includes S210.

[0037] In S210, a dedicated system message or a system broadcast message is transmitted to the first communication node so that the first communication node obtains a corresponding carrier frequency configuration message based on the dedicated system message or the system broadcast message.

[0038] The carrier frequency configuration message includes a frequency domain resource mapping mode, and the frequency domain resource mapping mode is used to determine the frequency domain resources used for sidelink signals or channels. In one embodiment, the carrier frequency configuration message further includes one of the frequency domain position of the sidelink synchronization signal block, the subcarrier spacing, the frequency domain resource mapping mode of the sidelink synchronization signal block, the frequency domain resource mapping mode of the sidelink signal or channel, the frequency domain resource mapping mode of the sidelink control channel and the shared channel, the frequency domain resource mapping mode of the sidelink feedback channel, and the frequency domain resource mapping mode of the sidelink pilot signal.

[0039] In one embodiment, the frequency domain resource mapping mode includes at least one of a frequency domain discrete resource mapping mode, a frequency domain continuous resource mapping mode, a mapping mode in which the sidelink synchronization signal block overlaps in the frequency domain with continuous frequency domain resources, and a frequency domain resource mapping mode that satisfies the requirement of the occupied channel bandwidth.

[0040] In one embodiment, the frequency domain resource mapping mode is indicated by an indication domain of the frequency domain resource mapping mode.

[0041] In one embodiment, the configuration granularity of the bearer message corresponding to the carrier frequency configuration message includes one of a carrier frequency, a carrier frequency list, a bandwidth part, a channel of the shared spectrum, a resource pool, and a resource block set.

[0042] In one embodiment, the frequency domain resource mapping mode of the sidelink synchronization signal block includes one of the frequency domain discrete resource mapping mode and the frequency domain resource mapping mode that satisfies the occupied channel bandwidth requirement. Here, some resource elements of the sidelink synchronization signal block are reserved resource elements, and the reserved resource elements are not mapped to any signal.

[0043] In one embodiment, the reserved resource elements include each N resource elements at the highest frequency domain position and / or the lowest frequency domain position of each resource block in the synchronization signal block, and each N resource elements at the highest frequency domain position and / or the lowest frequency domain position of each adjacent resource block group in the synchronization signal block, where N is a positive integer greater than or equal to 1.

[0044] In one embodiment, when the frequency domain resource mapping mode of the sidelink signal or channel at one carrier frequency is not indicated in the carrier frequency configuration message, the default frequency domain resource mapping mode of the sidelink signal or channel is used. For example, the default frequency domain resource mapping mode of the SL signal or channel is the frequency domain continuous resource mapping mode.

[0045] In the communication method applied to the second communication node, the interpretation of each parameter such as the carrier frequency configuration message and the frequency domain resource mapping mode can refer to the description of the corresponding parameter in the communication method applied to the first communication node in the above embodiment, and the description is omitted here.

[0046] In one embodiment, taking as an example the scenario where the first communication node is a User Equipment (UE), the second communication node is a base station, and the UE is within the coverage of the base station, the process of determining the frequency-domain resource mapping mode of the S-SSB will be described.

[0047] In the embodiment, the UE receives a system broadcast message or a dedicated system message sent from the base station, and obtains a carrier frequency configuration message used for SL communication. Here, the carrier frequency configuration message includes at least the frequency-domain position of the S-SSB at one carrier frequency, the subcarrier spacing, and the frequency-domain resource mapping mode of the S-SSB.

[0048] The configuration granularity of the resource configuration message may be one carrier frequency, one BWP, or one channel of the shared spectrum.

[0049] The UE determines the frequency domain resource mapping mode based on the carrier frequency configuration message in the current carrier. When the frequency domain resource mapping mode of the S-SSB is a resource mapping mode that is discrete in the frequency domain, the UE determines to use M discrete resource blocks (Interlace Resouce Block, IRB) where the S-SSB is discrete in the frequency domain. Here, the value of M is related to the SCS. For example, when the SCS is 15 KHz, 2 IRBs are used, and when the SCS is 30 KHz, 4 IRBs are used. Fig. 3 is a schematic configuration diagram of the S-SSB in the frequency domain discrete resource mapping mode according to the embodiment of the present application. As shown in Fig. 3, the left diagram in Fig. 3 shows the resource mapping mode that is discrete in the frequency domain, that is, the IRB1, IRB2, IRB3, and IRB4 are arranged in an interleaved format. The first RB position of the S-SSB is indicated by the frequency domain position of the S-SSB, and the transmission bandwidth of the S-SSB needs to be within one RB set. Also, in the frequency domain discrete resource mapping mode, the SSB corresponds to 2 IRBs, as shown in the right diagram of Fig. 3.

[0050] The UE determines the resource mapping mode based on the carrier frequency configuration message in the current carrier. When the frequency domain resource mapping mode of the S-SSB is a resource mapping mode that is continuous in the frequency domain, the UE determines to use 11 consecutive physical resource blocks (Physical Resource Blocks, PRBs) where the S-SSB is continuous in the frequency domain. Here, the first RB position of the S-SSB is indicated by the frequency domain position of the S-SSB. The transmission bandwidth of the S-SSB needs to be within one RB set. Fig. 4 is a schematic configuration diagram of the resource mapping mode that is continuous in the frequency domain according to the embodiment of the present application. As shown in the left diagram in Fig. 4.

[0051] The UE determines the resource mapping mode based on the carrier frequency configuration message in the current carrier, and when the frequency domain resource mapping mode of the S-SSB is a resource mapping mode where the frequency domain is continuous and the S-SSB overlaps in the frequency domain, it is determined that one S-SSB is mapped overlappingly in the frequency domain using 11 consecutive PRBs in the frequency domain and M S-SSBs. Here, the position of the first RB of the middle or the first S-SSB is indicated by the frequency domain position of the S-SSB. The transmission bandwidth of all S-SSBs needs to be within one RB set. This is as shown in the right figure in Figure 4.

[0052] In one example, based on the frequency domain resource mapping mode of the S-SSB, it is determined that the frequency domain resource mapping mode of other SL signals / channels coincides with the frequency domain resource mapping mode of the S-SSB.

[0053] In an embodiment, other SL signals / channels include at least one of a physical sidelink control channel PSCCH for bearing sidelink control information SCI, a physical sidelink shared channel PSSCH for bearing sidelink data transmission, a physical sidelink discovery channel PSDCH for bearing a discovery signal, a physical sidelink feedback channel PSFCH for bearing HARQ feedback information, a sidelink positioning signal SL-PRS for bearing a sidelink positioning signal, and a sidelink channel measurement signal SL-CSI-RS for bearing a sidelink CSI-RS signal.

[0054] As an example, when the frequency-domain resource mapping mode of S-SSB is the frequency-domain discrete resource mapping mode, it is determined that the frequency-domain resource mapping mode of PSCCH / PSCCH is also the frequency-domain discrete resource mapping mode, that is, it is determined that the subchannel of the frequency-domain resources used for PSCCH / PSCCH is composed of a plurality of discrete RBs (IRBs). As another example, when the frequency-domain resource mapping mode of S-SSB is the frequency-domain continuous resource mapping mode, it is determined that the frequency-domain resource mapping mode of PSCCH / PSCCH is also the frequency-domain continuous resource mapping mode, that is, it is determined that the subchannel of the frequency-domain resources used for PSCCH / PSCCH is composed of a plurality of continuous RBs.

[0055] In one embodiment, taking the scenario where the first communication node is a UE, the second communication node is a base station, and the UE is outside the coverage of the base station as an example, the process of determining the frequency-domain resource mapping mode of S-SSB will be described.

[0056] In the embodiment, the UE obtains a pre-set carrier frequency configuration message for SL communication. The carrier frequency configuration message at least includes the frequency-domain position of S-SSB at one carrier frequency, the subcarrier spacing, and the frequency-domain resource mapping mode of S-SSB. Based on the carrier frequency configuration message at the current carrier, the frequency-domain resource mapping mode of S-SSB is determined.

[0057] When the frequency-domain resource mapping mode of S-SSB is the frequency-domain discrete resource mapping mode, based on the frequency-domain resource mapping mode, it is determined to use M IRBs where S-SSB is discrete in the frequency domain, where the value of M is related to SCS. For example, when SCS is 15 KHz, 2 IRBs are used, and when SCS is 30 KHz, 4 IRBs are used. As shown in the left figure of Figure 3, a resource mapping mode where it is discrete in the frequency domain is adopted, that is, IRB1, IRB2, IRB3, and IRB4 are arranged in an interleaved format. As shown in the right figure of Figure 3, the first RB position of S-SSB is indicated by the frequency-domain position of S-SSB, and the transmission bandwidth of S-SSB needs to be within one RB set.

[0058] In one example, based on the frequency-domain resource mapping mode of S-SSB, it is determined that the frequency-domain resource mapping mode of other SL signals / channels is the same as that of S-SSB. Here, other SL signals / channels include at least one of an SL control channel PSCCH for bearing SL control information SCI, an SL shared channel PSSCH for bearing SL data transmission, an SL discovery channel PSDCH for bearing a discovery signal, an SL feedback channel PSFCH for bearing HARQ feedback information, an SL positioning signal SL-PRS for bearing an SL positioning signal, and an SL channel measurement signal SL-CSI-RS for bearing an SL CSI-RS signal.

[0059] In one embodiment, taking the first communication node as a UE and the second communication node as a base station as an example, the process of indicating the frequency-domain resource mapping mode of an SL signal or channel using the indication domain of the frequency-domain resource mapping mode will be described.

[0060] In an embodiment, the UE receives a system broadcast message or a dedicated system message, or obtains a configuration message of a carrier frequency used for SL communication based on a preconfigured message, where the configuration message includes at least a frequency domain resource mapping mode of an SL signal / channel at one carrier frequency.

[0061] When it is indicated that the frequency domain resource mapping mode of the SL signal / channel is the frequency domain discrete resource mapping mode, it is determined that the frequency domain resources used for S-SSB are discrete M IRBs (interlace RBs), where the value of M is related to the SCS. For example, when the SCS is 15 KHz, 2 IRBs are used, and when the SCS is 30 KHz, 4 IRBs are used. The left diagram in Figure 3 shows the resource mapping mode that is discrete in the frequency domain, that is, they are arranged in an interleaved form between IRB1, IRB2, IRB3, and IRB4. The first RB position of the S-SSB is indicated by the frequency domain position of the S-SSB, and the transmission bandwidth of the S-SSB needs to be within one RB set. Also, in the frequency domain discrete resource mapping mode, the SSB corresponds to 2 IRBs, as shown in the right diagram of Figure 3.

[0062] Also, it is determined that the frequency domain resource mapping mode of the PSCCH / PSSCH and / or PSFCH channel is the frequency domain discrete resource mapping mode, that is, the used frequency domain resources use the IRB as the basic unit of resource mapping, that is, one subchannel is composed of one or more IRBs. Figure 5 is a schematic diagram of the subchannel configuration in the frequency domain discrete resource mapping mode according to an embodiment of the present application. As shown in Figure 5, the IRB is within one or more RB sets, and each subchannel is composed of one or more IRBs.

[0063] When it is indicated that the frequency domain resource mapping mode of the SL signal / channel is the frequency domain continuous resource mapping mode, it is determined that the S-SSB uses 11 consecutive PRBs in the frequency domain. Here, the first RB position of the S-SSB is indicated by the frequency domain position of the S-SSB. The transmission bandwidth of the S-SSB needs to be within one RB set. It is also determined that the frequency domain resource mapping mode of the PSCCH / PSSCH and / or PSFCH channel is a continuous mapping mode in the frequency domain, or one sub-channel is composed of consecutive PRBs. FIG. 6 is a schematic diagram of the sub-channel configuration in the frequency domain continuous resource mapping mode according to the embodiment of the present application. As shown in FIG. 6, one sub-channel is composed of consecutive PRBs.

[0064] In one example, the SL signal / channel includes at least one of the SL synchronization signal S-SSB for bearing the synchronization signal and the SL broadcast information PSBCH, the SL control channel PSCCH for bearing the SL control information SCI, the SL shared channel PSSCH for bearing the SL data transmission, the SL discovery channel PSDCH for bearing the discovery signal, the SL feedback channel PSFCH for bearing the HARQ feedback information, the SL positioning signal SL-PRS for bearing the SL positioning signal, and the SL channel measurement signal SL-CSI-RS for bearing the SL CSI-RS signal.

[0065] In one embodiment, taking the example that the first communication node is a UE and the second communication node is a base station, a process of not indicating the frequency domain resource mapping mode of the SL signal or channel using the indication domain of the frequency domain resource mapping mode, that is, the default frequency domain resource mapping mode of the SL signal or channel is described.

[0066] In an embodiment, the UE receives a system broadcast message or a proprietary system message, or obtains a configuration message of a carrier frequency used for SL communication based on a preconfigured message.

[0067] If the frequency domain resource mapping mode of the SL signal / channel at one carrier frequency is not indicated in the carrier frequency configuration message, by default, the frequency domain resource mapping mode of the SL signal / channel is the frequency domain continuous resource mapping mode.

[0068] Alternatively, by default, the frequency domain resource mapping mode of the SL signal / channel is the frequency domain discrete resource mapping mode. As shown in Figure 3.

[0069] The SL signal / channel includes at least one of an SL synchronization signal S-SSB for bearing a synchronization signal and SL broadcast information PSBCH, an SL control channel PSCCH for bearing SL control information SCI, an SL shared channel PSSCH for bearing SL data transmission, an SL discovery channel PSDCH for bearing a discovery signal, an SL feedback channel PSFCH for bearing HARQ feedback information, an SL positioning signal SL-PRS for bearing an SL positioning signal, and an SL channel measurement signal SL-CSI-RS for bearing an SL CSI-RS signal.

[0070] In one embodiment, the first communication node is a UE, the second communication node is a base station, and one S-SSB uses discrete frequency domain resources. For example, taking the case where three RB groups are used and N is 2 (i.e., each RB group contains two RBs), a configuration process in which some REs of the S-SSB are reserved REs will be described. The value of N is predefined by the network configuration or system. When it is indicated that the frequency domain resource mapping mode of the SL signal / channel is the frequency domain discrete resource mapping mode, it is determined that the S-SSB uses M interlace RBs (IRBs) that are discrete in the frequency domain. Here, the value of M is related to the SCS. For example, when the SCS is 15 KHz, two IRBs are used, and when the SCS is 30 KHz, four IRBs are used. The left diagram in FIG. 3 shows the resource mapping mode that is discrete in the frequency domain, that is, IRB1, IRB2, IRB3, and IRB4 are arranged in an interleaved format. The first RB position of the S-SSB is indicated by the frequency domain position of the S-SSB, and the transmission bandwidth of the S-SSB needs to be within one RB set. Also, in the frequency domain discrete resource mapping mode, the SSB corresponds to two IRBs, as shown in the right diagram of FIG. 3.

[0071] FIG. 7 is a schematic diagram of the RE configuration in the resource block according to an embodiment of the present application. FIG. 8 is a schematic diagram of the RE configuration in the resource block group according to an embodiment of the present application. FIG. 9 is a schematic diagram of the RE configuration in another resource block according to an embodiment of the present application. FIG. 10 is a schematic diagram of the RE configuration in another resource block group according to an embodiment of the present application. When the frequency domain resource mapping mode of S-SSB is the frequency domain discrete resource mapping mode or the frequency domain resource mapping mode that meets the requirement of the occupied channel bandwidth, some REs of S-SSB are reserved REs, and the reserved REs are not mapped to any signal. The reserved REs may be the N REs with the highest frequency in each RB in S-SSB, or the N REs with the lowest frequency, or the N REs with the highest and lowest frequencies. They may also be the N REs with the highest frequency in each RB group in S-SSB, or the N REs with the lowest frequency, or the N REs with the highest and lowest frequencies.

[0072] As shown in FIG. 7, S-SSB uses discrete frequency domain resources. For example, it uses three RB groups, and each two REs at the highest frequency domain position of each RB in S-SSB are set as reserved REs.

[0073] As shown in FIG. 8, S-SSB uses discrete frequency domain resources. For example, it uses three RB groups, and one RB group contains two RBs. Each two REs at the lowest frequency domain position of each RB group in S-SSB are set as reserved REs.

[0074] As shown in FIG. 9, S-SSB uses discrete frequency domain resources. For example, it uses three RB groups, and each two REs at the highest frequency domain position and the lowest frequency domain position of each RB in S-SSB are set as reserved REs, that is, two REs at the highest frequency domain position and two REs at the lowest frequency domain position of each RB are selected as reserved REs.

[0075] As shown in FIG. 10, S-SSB uses discrete frequency domain resources. For example, three RB groups are used, and each RB group contains two RBs. Two REs at the highest frequency domain position and the lowest frequency domain position of each RB group in S-SSB are reserved REs, that is, two REs at the highest frequency domain position and two REs at the lowest frequency domain position of each RB group are selected as reserved REs.

[0076] The FIGS. 3 and 4 in the above embodiments merely exemplarily illustrate the number of RBs included in each S-SSB, and do not represent that each S-SSB contains four PRBs. In an actual communication process, when S-SSB adopts a resource mapping mode continuous in the frequency domain, each S-SSB correspondingly adopts 11 PRBs.

[0077] The FIGS. 5 and 6 in the above embodiments merely exemplarily describe that each subchannel contains three PRBs, and do not represent that each subchannel contains only three PRBs. In an actual communication process, each subchannel may contain more than three PRBs. For example, one subchannel contains 10 or more PRBs, and it may be limited according to the actual communication situation.

[0078] In one embodiment, FIG. 11 is a block diagram of the structure of a communication device according to an embodiment of the present application. This embodiment is applied to a first communication node. As shown in FIG. 11, the communication device in this embodiment includes an acquisition module 1110 and a determination module 1120.

[0079] The acquisition module 1110 is configured to acquire a carrier frequency configuration message, and the carrier frequency configuration message is configured to indicate a frequency domain resource mapping mode. The determination module 1120 is configured to determine the frequency domain resources used for sidelink signals or channels based on the frequency domain resource mapping mode.

[0080] In one embodiment, the sidelink signal or channel includes at least one of a sidelink synchronization signal block, a physical sidelink control channel / physical sidelink shared channel, a physical sidelink feedback channel, a sidelink channel state information reference signal, and a sidelink positioning reference signal.

[0081] In one embodiment, the bearer message of the carrier frequency configuration message includes one of a dedicated system message, a system broadcast message, and a pre-configured message.

[0082] In one embodiment, the acquisition module 1110 includes a receiving unit configured to receive a dedicated system message or a system broadcast message transmitted by a second communication node, and an acquisition unit configured to acquire a corresponding carrier frequency configuration message from the dedicated system message or the system broadcast message.

[0083] In one embodiment, the carrier frequency configuration message further includes at least one of a frequency domain position of a sidelink synchronization signal block, a subcarrier spacing, a frequency domain resource mapping mode of the sidelink synchronization signal block, a frequency domain resource mapping mode of a sidelink signal or channel, a frequency domain resource mapping mode of a sidelink control channel and a shared channel, a frequency domain resource mapping mode of a sidelink feedback channel, and a frequency domain resource mapping mode of a sidelink pilot signal.

[0084] In one embodiment, the frequency domain resource mapping mode includes at least one of a frequency domain discrete resource mapping mode, a frequency domain continuous resource mapping mode, a mapping mode in which the sidelink synchronization signal block overlaps in the frequency domain with continuous frequency domain resources, and a frequency domain resource mapping mode that satisfies the requirement of the occupied channel bandwidth.

[0085] In one embodiment, the frequency domain resource mapping mode is indicated by an indication domain of the frequency domain resource mapping mode.

[0086] In one embodiment, the configuration granularity of the bearer message corresponding to the carrier frequency configuration message includes one of a carrier frequency, a carrier frequency list, a bandwidth part, a channel of a shared spectrum, a resource pool, and a resource block set.

[0087] In one embodiment, the carrier frequency configuration message indicating the frequency domain resource mapping mode includes the carrier frequency configuration message indicating the frequency domain resource mapping mode of the sidelink synchronization signal block.

[0088] In one embodiment, the carrier frequency configuration message indicating the frequency domain resource mapping mode is including the carrier frequency configuration message indicating the frequency domain resource mapping mode of the sidelink synchronization signal block and determining the frequency domain resource mapping mode of other sidelink signals or channels based on the frequency domain resource mapping mode of the sidelink synchronization signal block.

[0089] In one embodiment, the frequency domain resource mapping mode of the sidelink synchronization signal block includes one of a frequency domain discrete resource mapping mode and a frequency domain resource mapping mode that satisfies the requirement of the occupied channel bandwidth, where some resource elements of the sidelink synchronization signal block are reserved resource elements, and the reserved resource elements are not mapped to any signal.

[0090] In one embodiment, the reserved resource elements are Each of N resource elements at the highest frequency region position and / or the lowest frequency region position of each resource block in the synchronization signal block, and one of each N resource elements at the highest frequency region position and / or the lowest frequency region position of each adjacent resource block group in the synchronization signal block, where N is a positive integer greater than or equal to 1.

[0091] In one embodiment, the carrier frequency configuration message indicating the frequency domain resource mapping mode includes the carrier frequency configuration message indicating the frequency domain resource mapping mode of the sidelink signal or channel.

[0092] In one embodiment, when the frequency domain resource mapping mode of the sidelink signal or channel at one carrier frequency is not indicated in the carrier frequency configuration message, the default frequency domain resource mapping mode of the sidelink signal or channel is used.

[0093] The communication device according to this embodiment is configured to implement the communication method applied to the first communication node in the embodiment shown in FIG. 1. The implementation principle and technical effects of the communication device according to this embodiment are similar and will not be described here.

[0094] In one embodiment, FIG. 12 is a block diagram of the structure of another communication device according to the embodiment of the present application. This embodiment is applied to the second communication node. As shown in FIG. 12, the communication device in this embodiment includes a transmitter 1210.

[0095] The transmitter 1210 is configured to transmit a dedicated system message or a system broadcast message to the first communication node so as to cause the first communication node to obtain a corresponding carrier frequency configuration message, and the carrier frequency configuration message includes a frequency domain resource mapping mode for determining frequency domain resource used for a sidelink signal or a channel.

[0096] In one embodiment, the carrier frequency configuration message includes at least one of a frequency domain position of a sidelink synchronization signal block, a subcarrier spacing, a frequency domain resource mapping mode of the sidelink synchronization signal block, a frequency domain resource mapping mode of a sidelink signal or a channel, a frequency domain resource mapping mode of a sidelink control channel and a shared channel, a frequency domain resource mapping mode of a sidelink feedback channel, and a frequency domain resource mapping mode of a sidelink pilot signal.

[0097] In one embodiment, the frequency domain resource mapping mode includes at least one of a frequency domain discrete resource mapping mode, a frequency domain continuous resource mapping mode, a mapping mode in which the sidelink synchronization signal block overlaps in the frequency domain with continuous frequency domain resources, and a frequency domain resource mapping mode that satisfies a requirement for an occupied channel bandwidth.

[0098] In one embodiment, the frequency domain resource mapping mode is indicated by an indication domain of the frequency domain resource mapping mode.

[0099] In one embodiment, the configuration granularity of the bearer message corresponding to the carrier frequency configuration message includes one of a carrier frequency, a carrier frequency list, a bandwidth part, a channel of a shared spectrum, a resource pool, and a resource block set.

[0100] In one embodiment, the frequency-domain resource mapping mode of the sidelink synchronization signal block includes one of the frequency-domain discrete resource mapping mode and the frequency-domain resource mapping mode that meets the requirements of the occupied channel bandwidth. Here, some resource elements of the sidelink synchronization signal block are reserved resource elements, and the reserved resource elements are not mapped to any signal.

[0101] In one embodiment, the reserved resource elements are each N resource elements at the highest frequency-domain position and / or the lowest frequency-domain position of each resource block in the synchronization signal block, and each N resource elements at the highest frequency-domain position and / or the lowest frequency-domain position of each adjacent resource block group in the synchronization signal block, where N is a positive integer greater than or equal to 1.

[0102] In one embodiment, when the frequency-domain resource mapping mode of the sidelink signal or channel at one carrier frequency is not indicated in the carrier frequency configuration message, the default frequency-domain resource mapping mode of the sidelink signal or channel is used.

[0103] The communication device according to this embodiment is configured to implement the communication method applied to the second communication node in the embodiment shown in FIG. 2. The implementation principle and technical effects of the communication device according to this embodiment are similar and will not be described here.

[0104] In one embodiment, FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in FIG. 13, the device according to the present application includes a processor 1310 and a memory 1320. The number of processors 1310 in the device may be one or more. In FIG. 13, one processor 1310 is taken as an example. The number of memories 1320 in the device may be one or more. In FIG. 13, one memory 1320 is taken as an example. The processor 1310 and the memory 1320 of the device can be connected by a bus or other means. In FIG. 13, connection via a bus is taken as an example.

[0105] The memory 1320, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, for example, program instructions / modules corresponding to the devices in any embodiment of the present application (for example, the acquisition module 1110 and the determination module 1120 in the communication device). The memory 1320 may include a program storage area and a data storage area. Here, the program storage area can store an operating system and at least one application program required for a function, and the data storage area can store data created based on the use of the device and the like. In addition, the memory 1320 may include a high-speed random access memory, and may further include a non-volatile memory such as at least one magnetic disk storage device, a flash memory, or other non-volatile solid storage devices. In some embodiments, the memory 1320 can include a memory provided remotely with respect to the processor 1310, and these remote memories can be connected to the device via a network. Examples of the above network may include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0106] When the communication device is the first communication node, the device described above can be configured to execute the communication method applicable to the first communication node according to any of the above embodiments, and has corresponding functions and effects.

[0107] When the communication device is the second communication node, the device described above can be configured to execute the communication method applicable to the second communication node according to any of the above embodiments, and has corresponding functions and effects.

[0108] The embodiments of the present application further provide a storage medium including computer-executable instructions, which, when executed by a computer processor, are used to execute the communication method applicable to the first communication node. The method includes obtaining a carrier frequency configuration message, and when the carrier frequency configuration message indicates a frequency domain resource mapping mode, determining the frequency domain resources used for sidelink signals or channels based on the frequency domain resource mapping mode.

[0109] The embodiments of the present application further provide a storage medium including computer-executable instructions, which, when executed by a computer processor, are used to execute the communication method applicable to the second communication node. The method includes sending a dedicated system message or a system broadcast message to the first communication node so as to obtain a corresponding carrier frequency configuration message based on the dedicated system message or the system broadcast message of the first communication node. The carrier frequency configuration message includes a frequency domain resource mapping mode for determining the frequency domain resources used for sidelink signals or channels.

[0110] The term "user terminal" includes any suitable type of wireless user equipment, for example, including mobile phones, portable data processing devices, portable network browsers or in-vehicle mobile stations.

[0111] Generally, various embodiments of the present application can be implemented in hardware or application-specific circuits, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, and other aspects can be implemented in firmware or software executable by a controller, a microprocessor, or other computing devices, and the present application is not limited thereto.

[0112] Embodiments of the present application can be implemented by executing computer program instructions by a data processor of a mobile device. For example, in the entity of the processor, it can be implemented by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or target code described in any combination of one or more programming languages.

[0113] The block diagrams of any logical flow in the figures of the present application may represent program steps, may represent logical circuits, modules, and functions connected to each other, or may represent a combination of program steps and logical circuits, modules, and functions. A computer program may be stored in a memory. The memory may have any type suitable for the local technical environment and may be implemented with any suitable data storage technology. For example, it may include, but is not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (such as digital versatile disc (DVD) or compact disc (CD)), etc. The computer-readable medium may include a non-transitory storage medium. The data processor may be of any type suitable for the local technical environment, and for example, may be a general-purpose computer, a dedicated computer, a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), and a processor based on a multi-core processor architecture, but is not limited to these.

Claims

1. A communication method applied to a first communication node, comprising: obtaining a carrier frequency configuration message, wherein the carrier frequency configuration message indicates a frequency domain resource mapping mode; and determining a frequency domain resource used for a sidelink signal or channel based on the frequency domain resource mapping mode. The communication method.

2. The sidelink signal or channel includes at least one of a sidelink synchronization signal block, a physical sidelink control channel / physical sidelink shared channel, a physical sidelink feedback channel, a sidelink channel state information reference signal, and a sidelink positioning reference signal. The communication method according to Claim 1.

3. The bearer message of the carrier frequency configuration message includes one of a dedicated system message, a system broadcast message, and a pre-configured message. The communication method according to Claim 1.

4. Obtaining the carrier frequency configuration message includes: receiving a dedicated system message or a system broadcast message transmitted by a second communication node; and obtaining a corresponding carrier frequency configuration message from the dedicated system message or the system broadcast message. The communication method according to Claim 1.

5. The carrier frequency configuration message includes at least one of a frequency domain position of a sidelink synchronization signal block, a subcarrier spacing, a frequency domain resource mapping mode of the sidelink synchronization signal block, a frequency domain resource mapping mode of a sidelink signal or channel, a frequency domain resource mapping mode of a sidelink control channel and a shared channel, a frequency domain resource mapping mode of a sidelink feedback channel, and a frequency domain resource mapping mode of a sidelink pilot signal. The communication method according to Claim 1.

6. The frequency domain resource mapping mode includes at least one of a frequency domain discrete resource mapping mode, a frequency domain continuous resource mapping mode, a frequency domain continuous resource mapping mode in which the sidelink synchronization signal block overlaps in the frequency domain, and a frequency domain resource mapping mode that satisfies a requirement for an occupied channel bandwidth. The communication method according to claim 1 or 5.

7. The frequency domain resource mapping mode is indicated by an indication domain of the frequency domain resource mapping mode. The communication method according to claim 6.

8. The configuration granularity of the bearer message corresponding to the carrier frequency configuration message includes one of a carrier frequency, a carrier frequency list, a bandwidth part, a channel in a shared spectrum, a resource pool, and a resource block set. The communication method according to claim 1.

9. That the carrier frequency configuration message indicates a frequency domain resource mapping mode includes that the carrier frequency configuration message indicates a frequency domain resource mapping mode of a sidelink synchronization signal block. The communication method according to claim 1.

10. That the carrier frequency configuration message indicates a frequency domain resource mapping mode includes that the carrier frequency configuration message indicates a frequency domain resource mapping mode of a sidelink synchronization signal block, and determining a frequency domain resource mapping mode of another sidelink signal or channel based on the frequency domain resource mapping mode of the sidelink synchronization signal block. The communication method according to claim 1.

11. The frequency domain resource mapping mode of the sidelink synchronization signal block is one of a frequency domain discrete resource mapping mode and a frequency domain resource mapping mode that satisfies a requirement of an occupied channel bandwidth, and some resource elements of the sidelink synchronization signal block are reserved resource elements, and the reserved resource elements are not mapped to any signal. The communication method according to claim 9 or 10.

12. The reserved resource elements are at least one of N resource elements at the highest frequency domain position and N resource elements at the lowest frequency domain position of each resource block in the synchronization signal block, and at least one of N resource elements at the highest frequency domain position and N resource elements at the lowest frequency domain position of each adjacent resource block group in the synchronization signal block, and N is a positive integer of 1 or more. The communication method according to claim 11.

13. The fact that the carrier frequency configuration message indicates a frequency domain resource mapping mode means that the carrier frequency configuration message includes indicating a frequency domain resource mapping mode of a sidelink signal or channel, The communication method according to claim 1.

14. When the frequency domain resource mapping mode of the sidelink signal or channel at one carrier frequency is not indicated in the carrier frequency configuration message, use the default frequency domain resource mapping mode of the sidelink signal or channel. The communication method according to claim 1.

15. A communication method applied to a second communication node, including transmitting the dedicated system message or system broadcast message to the first communication node so that the first communication node obtains a corresponding carrier frequency configuration message based on the dedicated system message or system broadcast message, wherein the carrier frequency configuration message includes a frequency domain resource mapping mode for determining a frequency domain resource used for a sidelink signal or channel, Communication method.

16. Comprising a memory and at least one processor, the memory is configured to store at least one program, when the at least one program is executed by the at least one processor, the at least one processor implements the communication method according to any one of claims 1 to 14 or the communication method according to claim 15, Communication device.

17. When executed by a processor, a computer program that implements the communication method according to any one of claims 1 to 14 or the communication method according to claim 15 is stored, Storage medium.

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