Method, apparatus, and communication system for transmitting signals

Abstract

In an embodiment of the present invention, a signal transmission device is provided, which is applied to a terminal device, wherein the first terminal device performs sidelink communication, and the signal transmission device includes a first transmission unit, which is configured to determine information of a cyclic prefix extension (CPE) based on information of data to be transmitted; and to perform sidelink signal transmission based on the CPE.

Description

Technical Field

[0001] The present invention relates to the technical field of communications.

Background Art

[0002] In non-authorized frequency band new radio (NR-U) technology, a part of the continuous occupancy time (COT) obtained by access initiated by a network device (e.g., gNB) can be shared with a terminal device for uplink (UL) transmission (i.e., COT sharing). Among them, the network device gNB can control the method by which the terminal device (e.g., UE) performs LBT (listen before talk) (i.e., LBT type) and the time when the terminal device UE accesses by setting a cyclic prefix extension (CPE).

[0003] CPE is the CP extension of the first uplink data signal after downlink transmission within the continuous occupancy time (COT) obtained by access initiated by a network device (e.g., gNB), and it does not need to carry valid information. FIG. 1 is a diagram showing CPE setting in NR-U. As shown in FIG. 1, by setting CPE, the network device can make the interval between downlink (DL) transmission and uplink (UL) transmission be 25 μs + TA, where TA represents Timing Advance. In FIG. 1, the length of CPE is gap - (25 μs + TA). Among them, gap represents the interval between DL transmission and actual UL transmission.

[0004] Regarding the configured grant (CG) to be set, the network device can also set the start time of UL transmission, i.e., the length of the CPE, through upper-layer signaling. The upper layer can set the length of the Δ parameter in the following four cases of the CG of the terminal device: {occupying all of the LBT bandwidth and within the COT}, {occupying all of the LBT bandwidth and outside the COT}, {occupying some of the LBT bandwidth and within the COT}, and {occupying some of the LBT bandwidth and within the COT}, and the terminal device can calculate the CPE length T corresponding to its CG UL transmission according to the following formula (1). ext can be obtained by calculation.

[0005]

Number

[0006]

Table 1

[0007]

Number

[0008] As can be seen from the above formulas and descriptions, the smaller the value of the parameter Δ, the larger the value of the CPE, which indicates that the terminal device can start UL transmission earlier so as to achieve the purpose of pre-empting the channel faster. In an actual system, the network device can realize the effect of allowing some transmissions to preferentially access the channel by setting different CPE values for the UL transmissions of different terminal devices. At this time, for the transmissions regarded as having a relatively high priority by the network device, relatively large CPE values are set. Also, the same CPE value can be set for two transmissions to which FDM resources are allocated, so that the channel access time between them is the same, they do not affect each other's LBT results, and the effect of performing transmissions using UL resources frequency-division multiplexed (Frequency Division Multiplexing, FDM) from the same time can be realized.

[0009] Figure 2 is a diagram showing the priority access of CG and the FCM transmission access. As shown in Figure 2, in the scenario shown at 201, since the CPE value of UL#2 is larger than the CPE value of UL#1, UL#2 can access transmission preferentially over UL#1. In the scenario shown at 202, since the CPE value of UL#2 is the same as the CPE value of UL#1, UL#2 and UL#1 can perform transmissions using UL resources frequency-division multiplexed at the same time.

[0010] It should be noted that the introduction of the above background technology is for clearly and completely explaining the technical solution of the present invention and for facilitating understanding by those skilled in the art. These technical solutions should not be construed as well-known to those skilled in the art just because they are described in the background technology of the present invention.

Summary of the Invention

Problems to be Solved by the Invention

[0011] In order to enhance data throughput in sidelink and improve system capacity, as one feasible method, there is a method of increasing the available frequency band of sidelink. For example, there is a technology of deploying sidelink in an unlicensed band, that is, unlicensed band sidelink (SL-U) technology.

[0012] In SL-U technology, the resource selection and collision avoidance mechanism of the terminal device (e.g., UE) is only based on LBT. That is, when the sensing / selection process in sidelink is not performed, UEs cannot know the values of CPE adopted by each other, and also cannot know the frequency domain resource used by each other. Therefore, it becomes difficult for UEs to perform SL transmission in the FDM manner. Thus, a better method is the LBT + sensing / selection scheme. At least, LBT and sensing / selection can coexist.

[0013] The inventor of the present invention has discovered the following. That is, similar to NR-U, the occupancy of its COT is initiated by the UE. In SL-U, especially for UEs working in mode 2, since there is no participation of the network device, the occupancy of the COT also needs to be initiated by the UE. Then, when there is no participation of the base station, how to control the channel access order among different UEs, or how to improve the system frequency spectrum efficiency by FDM of SL transmissions of different UEs is a problem to be solved.

[0014] In view of at least one of the above problems, embodiments of the present invention provide a method and apparatus for transmitting signals and a communication system. Thereby, a terminal device performing sidelink (SL) communication can control the order in which the terminal device accesses the channel in the sidelink communication scenario by determining the information of the cyclic prefix extension (CPE) based on the information of the data waiting to be transmitted.

Means for Solving the Problem

[0015] According to one aspect of an embodiment of the present invention, a device for transmitting a signal is provided, which is applied to a first terminal device, the first terminal device performs sidelink communication, the device includes a first transmission unit, and the first transmission unit is configured as follows, that is, Based on information of data waiting to be transmitted, determine information of cyclic prefix extension (CPE); and Perform sidelink signal transmission based on the CPE.

[0016] According to another aspect of an embodiment of the present invention, a device for transmitting a signal is provided, which is applied to a first terminal device, the first terminal device performs sidelink communication, the device includes a second transmission unit, and the second transmission unit is set as follows, that is, Based on the value or priority of the cyclic prefix extension (CPE) corresponding to other transmission data in the same time unit as the resource used by the current transmission data, and the value of the first CPE, set the value of the CPE corresponding to the current transmission data of the first terminal device; and Perform sidelink signal transmission based on the CPE, wherein the other transmission data is data transmitted by a second terminal device.

Advantageous Effects of the Invention

[0017] The advantageous effects according to the embodiments of the present invention are at least as follows, that is, a terminal device performing sidelink (SL) communication can control the order in which the terminal device accesses the channel in a sidelink communication scenario by determining information of cyclic prefix extension (CPE) based on information of data waiting to be transmitted.

[0018] Specific embodiments of the present invention are disclosed in detail by referring to the following description and drawings, showing aspects in which the principles of the present invention can be adopted. It should be noted that the embodiments of the present invention are not limited thereto in scope. Within the scope of the appended claims, the embodiments of the present invention may include various changes, modifications, and alternatives.

[0019] Also, the features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with the features in other embodiments, or replace the features in other embodiments.

[0020] It should be noted that terms such as "comprising / including" when used in this specification refer to the presence of features, elements, steps, or assemblies, but also refer to not excluding the presence or addition of one or more other features, elements, steps, or assemblies.

Brief Description of Drawings

[0021] The elements and features described in one drawing or one embodiment of the present invention can be combined with the elements and features shown in one or more other drawings or embodiments. Also, in the drawings, similar reference numerals indicate corresponding parts in several drawings and are also used to indicate corresponding parts used in multiple embodiments.

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Best Mode for Carrying Out the Invention

[0022] By referring to the accompanying drawings and the following description, the foregoing and other features of the present invention will become apparent. Although specific embodiments of the present invention are disclosed in the specification and drawings, they are only examples that can adopt the principles of the present invention. It should be understood that the present invention is not limited to the described embodiments, that is, the present invention also includes all changes, modifications, and alternatives within the scope of the appended claims.

[0023] In an embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network conforming to any of the following communication standards, for example, New Radio (NR), Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA (registered trademark)), High-Speed Packet Access (HSPA), and the like.

[0024] In addition, the communication between devices in the communication system may be performed according to the communication protocol at any stage, and may include, for example, the following communication protocols, but is not limited thereto, that is, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, New Radio (NR), etc., and / or other conventional or future-developed communication protocols.

[0025] In the embodiments of the present invention, the term "network device" refers to, for example, a device that connects a terminal device to a communication network and provides services to the terminal device in a communication system. The network device may include, but is not limited to, the following, that is, "Node" and / or "donar" in the IAB architecture, Base Station (BS), Access Point (AP), Transmission Reception Point (TRP), broadcast transmitter, Mobile Management Entity (MME), network gateway, server, Radio Network Controller (RNC), Base Station Controller (BSC), etc.

[0026] Among them, the base station may include, but is not limited to, the following, that is, Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may further include Remote Radio Head (RRH), Remote Radio Unit (RRU), relay or low-power node (for example, femto, pico, etc.). In addition, the term "base station" may include some or all of their functions, and each base station can provide communication coverage for a specific geographical area. The term "cell" may refer to a base station and / or the area it covers, which depends on the context of the term.

[0027] In an embodiment of the present invention, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network by a network device and receives services from the network. The user equipment may be fixed or mobile, and is also referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, etc. For example, it is a terminal device served by an IAB node or an IAB donor in an IAB architecture.

[0028] Among them, the user equipment may include, but is not limited to, for example, a cellular phone, a PDA (Personal Digital Assistant), a wireless modem, a wireless communication device, a portable device, a machine type communication device, a laptop computer, a cordless telephone, a smartphone, a smartwatch, a digital camera, etc.

[0029] Also, for example, in a scenario such as IoT (Internet of Things), the user equipment may further be a device or apparatus that performs monitoring or measurement. For example, it may include, but is not limited to, the following, that is, a machine type communication (MTC) terminal, a vehicle-mounted communication terminal, a D2D (Device to Device) terminal, an M2M (Machine to Machine) terminal, etc.

[0030] Also, the term "network side" or "network device side" refers to the side of the network, or may be a base station, or one or more network devices as described above. The terms "user side" or "terminal side" or "terminal device side" refer to the side of the user or the terminal, or may be a UE, or one or more terminal devices as described above.

[0031] Unless it causes confusion, the term "uplink control signal" can be interchanged with "uplink control information (UCI)" or "physical uplink control channel (PUCCH)", the term "uplink data signal" can be interchanged with "uplink data information" or "physical uplink shared channel (PUSCH)", the term "downlink control signal" can be interchanged with "downlink control information (DCI)" or "physical downlink control channel (PDCCH)", and the term "downlink data signal" can be interchanged with "downlink data information" or "physical downlink shared channel (PDSCH)".

[0032] Also, the transmission or reception of PUSCH may be understood as transmitting or receiving uplink data carried by PUSCH, the transmission or reception of PUCCH may be understood as transmitting or receiving uplink information carried by PUCCH, the transmission or reception of PRACH may be understood as transmitting or receiving a preamble carried by PRACH. The uplink signal may include an uplink data signal and / or an uplink control signal, etc. Also, it may be referred to as "UL transmission" or "uplink information" or "uplink channel". Transmitting an UL transmission on an uplink resource may be understood as transmitting the UL transmission using the uplink resource. Similarly, downlink data / signal / channel / information can be understood correspondingly.

[0033] In an embodiment of the present invention, the upper layer signaling may be, for example, radio resource control (RRC) signaling, which is called, for example, an RRC message and includes, for example, a master information block (MIB), system information, and dedicated RRC messages, or is called an RRC information element (RRC IE). The upper layer signaling may be, for example, further medium access control (MAC) signaling, or is referred to as a MAC control element (MAC CE). Note that the present invention is not limited thereto.

[0034] <Embodiment of the first aspect> In an embodiment of the first aspect of the present invention, a method for transmitting a signal is provided, which is applied to a first terminal device that performs sidelink (SL) communication. For example, the method for transmitting the signal is applied to the SL-U scenario.

[0035] FIG. 3 is a diagram showing the signal transmission method in the embodiment of the first aspect of the present invention. As shown in FIG. 3, the method includes the following operations (steps).

[0036] Operation 301: Based on the information of the data waiting to be transmitted, the first terminal device determines the information of cyclic prefix extension (CPE); and Operation 302: The first terminal device performs sidelink signal transmission based on the determined CPE.

[0037] According to the embodiment of the first aspect of the present invention, the first terminal device performing sidelink (SL) communication can control the order in which the terminal device accesses the channel in the sidelink communication scenario by determining the information of cyclic prefix extension (CPE) based on the information of the data waiting to be transmitted.

[0038] The information of the CPE includes the value of the CPE (CPE value) or the value of the first parameter, and the value of the first parameter is used to calculate the value of the CPE. For example, the value of the first parameter may be a Δ parameter.

[0039] FIG. 4 is a diagram showing the CPE in an embodiment of the first aspect. As shown in FIG. 4, in the scenario of SL communication, the CPE is the CP extension of the sidelink data signal SL#n.

[0040] In the embodiment of the first aspect, the information of the data waiting to be transmitted includes the priority of the data waiting to be transmitted and / or the PDB (PDB, package delay budget) of the data waiting to be transmitted. Among them, the priority can be represented by the value of the priority. For example, the lower the value of the priority of the data waiting to be transmitted, the larger the value of the CPE. Also, for example, the smaller the PDB of the data waiting to be transmitted, the larger the value of the CPE.

[0041] Hereinafter, the embodiment of the first aspect will be described in detail.

[0042] (Embodiment A) In Embodiment A of the signal transmission method in the embodiment of the first aspect of the present invention, there is a mapping relationship between the information of the data waiting to be transmitted and the value of the CPE or the value of the first parameter.

[0043] [Embodiment 1] In one example, the priority value and / or PDB of the data waiting to be transmitted may have a direct mapping relationship with the value of the CPE. The mapping relationship may be set by a radio resource control information element (RRC IE) in a sidelink resource pool, may be pre-set or pre-defined, or may be set by a secondary information block (SIB) or an RRC message of a network device (for example, applied to a terminal device within coverage, i.e., an in-coverage UE). The mapping between the priority value and / or PDB and the CPE may be a one-to-one mapping or a many-to-one mapping. Table 2 shows the mapping relationship between the priority value and the CPE value. Since the smaller the priority value of the data waiting to be transmitted, the higher the priority, the smaller the priority value of the data waiting to be transmitted, the larger the corresponding CPE value, and thus, the more preferentially the channel can be accessed.

[0044]

Table 2

[0045] In another example, the priority value and / or PDB of the data waiting to be transmitted may have a mapping relationship with the value of a first parameter (for example, a Δ parameter). The mapping relationship may be set, defined, pre-set, or pre-defined. Table 3 shows the mapping relationship between the priority value and the value of the Δ parameter (Δ value).

[0046]

Table 3

[0047]

Number

[0048] In Embodiment 1, when the first terminal device starts a continuous occupancy time (COT) (i.e., in the case of OutsideCOT), the first terminal device determines the value of the CPE based on the above-mentioned mapping relationship (for example, the mapping relationship shown in Table 2 or Table 3). When the first terminal device shares a continuous occupancy time (COT) started by another terminal device (the second terminal device) different from the first terminal device (i.e., in the case of InsideCOT), the first terminal device determines the value of the CPE based on the indication information transmitted by the other device. Among them, the indication information can be carried by the sidelink control information (SCI).

[0049] For example, for each priority value or PDB, the corresponding CPE value or the value of the Δ parameter only corresponds to the case of OutsideCOT. That is, the above-mentioned mapping relationship represents the mapping relationship between the priority value or PDB and the CPE value or the value of the Δ parameter in the case of OutsideCOT. Also, in the case of InsideCOT (i.e., when the continuous occupancy time (COT) is started by another terminal device and the first terminal device shares this COT), the value of the CPE corresponding to the data waiting to be transmitted by the first terminal device is not determined by the priority value or PDB of the data waiting to be transmitted. For example, the other terminal device that starts COT sharing instructs (for example, instructs by SCI) both the first terminal device and the other terminal device to perform COT sharing, and also instructs the magnitude and related information of the CPE value (or Δ value) (for example, instructs by SCI).

[0050] Among them, the mapping relationship between the priority value and the CPE value in the case of OutsideCOT or the value of the Δ parameter may be represented, for example, in the forms shown in Table 4 and Table 5 below.

[0051] [Table 4]

[0052] [Table 5] [Example 2] In Example 2, the mapping relationship between the information of the data waiting to be transmitted and the value of the CPE or the value of the first parameter is the mapping relationship between the information of the data waiting to be transmitted and the value of the CPE when the first terminal device starts COT (i.e., in the case of OUTsideCOT) and the value of the CPE when the first terminal device shares the COT started by another terminal device different from the first terminal device (i.e., in the case of INsideCOT); or the mapping relationship between the information of the data waiting to be transmitted and the value of the first parameter when the first terminal device starts COT (i.e., in the case of OUTsideCOT) and the value of the first parameter when the first terminal device shares the COT started by another terminal device different from the first terminal device (i.e., in the case of INsideCOT) is included.

[0053] For example, for each priority value or PDB, it may correspond to two different CPE values or Δ parameter values respectively. The two values correspond to the cases of InsideCOT and OutsideCOT respectively. The CPE values for InsideCOT and OutsideCOT corresponding to each priority value or PDB may be the same or different.

[0054] Table 6 shows the mapping relationship between the priority value, the CPE value in the case of InsideCOT, and the CPE value in the case of OutsideCOT.

[0055]

Table 6

[0056]

Table 7

[0057] In at least one embodiment, as shown in FIG. 3, the method for transmitting the signal further includes the following operations.

[0058] Operation 303: The first terminal device indicates the value of the CPE or the value of the first parameter determined in Operation 301.

[0059] For example, in the sidelink control information (SCI) transmitted by the first terminal device, it is possible to indicate the value of the CPE or the Δ value determined in operation 301, which corresponds to subsequent transmissions. Specifically, the value of the CPE or the Δ value can be indicated by an existing reserved bit or a single new field in the existing sidelink control information format (SCI format). Among them, the corresponding SCI format may be the existing SCI format 1-A, SCI format 2-A, or SCI format 2-B in the standard, or it can also be indicated by a field in the SCI format newly added in Release 18 (R-18) of 3GPP (registered trademark). Also, in the SCI, this information does not necessarily have to be indicated. The first terminal device can indirectly (implicitly) obtain the value of the CPE or the value of the first parameter by using the value indicated by the existing "Priority" field in the SCI and obtaining the priority value of its SL transmission by the above method.

[0060] FIG. 5 is a diagram showing that the first terminal device indicates the value of the CPE. As shown in 501 of FIG. 5, the first terminal device directly indicates the value of the CPE (CPE value) for subsequent transmissions. As shown in 502 of FIG. 5, the first terminal device indicates a value related to the priority for subsequent transmissions, and the subsequent transmission determines the value of the CPE based on the value related to this priority.

[0061] (Embodiment B) In Embodiment B, there is a mapping relationship between the information of the data waiting to be transmitted and the first set of CPE values or the second set of values of the first parameter. Among them, in operation 301, the first terminal device determines the first set or the second set based on the information of the data waiting to be transmitted and the above mapping relationship, and then selects the CPE value from the first set, or selects the value of the first parameter from the second set, and can calculate the value of the CPE based on the value of the first parameter.

[0062] For example, the first terminal device selects a CPE value from the first set as the determined CPE value (for example, selects randomly or by other methods), or the first terminal device calculates the CPE value using the value of the first parameter selected from the second set (for example, selects randomly or by other methods) as the determined CPE value.

[0063] In one embodiment, the mapping relationship only includes the mapping relationship between the information of the data waiting to be transmitted and the first set of CPE values or the second set of values of the first parameter in the case of OUTside COT. For example, when the first terminal device starts a continuous occupancy time (COT) (that is, in the case of OUTside COT), the first terminal device determines the first set based on the mapping relationship (that is, there is a mapping relationship between the information of the data waiting to be transmitted and the first set of CPE values or the second set of values of the first parameter). Also, for example, when the first terminal device shares a continuous occupancy time (COT) started by another terminal device different from the first terminal device (that is, in the case of INside COT), the first terminal device determines the first set based on the instruction information transmitted by the other terminal device. For example, the instruction information can be transmitted by SCI.

[0064] In another embodiment, there is a mapping relationship between the information of the data waiting to be transmitted and the first set of CPE values or the second set of values of the first parameters in the case of OUTside COT or Inside COT. For example, the mapping relationship is the mapping relationship between the information of the data waiting to be transmitted and the first set when the first terminal device starts COT (i.e., in the case of OUTside COT) and the first set when the first terminal device shares the COT started by another terminal device different from the first terminal device (i.e., in the case of INside COT); or, the mapping relationship between the information of the data waiting to be transmitted and the second set when the first terminal device starts COT (i.e., in the case of OUTside COT) and the second set when the first terminal device shares the COT started by another terminal device different from the first terminal device (i.e., in the case of INside COT). Thereby, whether in the case of OUTside COT or Inside COT, the first set or the second set can be obtained based on the corresponding mapping relationship.

[0065] In Embodiment B, as shown in FIG. 3, the method for transmitting the signal further includes the following operations.

[0066] Operation 304: Instruct the first set or the second set determined by the first terminal device, or instruct the value of one CPE in the first set determined by the first terminal device or the value of one first parameter in the second set.

[0067] In Operation 304, the value of one CPE in the first set determined and instructed by the first terminal device (e.g., instructed by SCI) includes the maximum value or the minimum value in the first set, or a value selected based on the implementation. The value of one first parameter in the second set determined and instructed by the first terminal device (e.g., instructed by SCI) includes the maximum value or the minimum value in the second set, or a value selected based on the implementation.

[0068] According to an embodiment of the first aspect of the present invention, a first terminal device performing sidelink (SL) communication determines cyclic prefix extension (CPE) information based on information of data waiting to be transmitted, thereby controlling the order in which terminal devices access a channel in a sidelink communication scenario.

[0069] <Embodiment of the second aspect> In an embodiment of the second aspect of the present invention, a method for transmitting a signal is provided, which is applied to a first terminal device that performs sidelink (SL) communication. For example, the method for transmitting the signal is applicable to the SL-U scenario.

[0070] FIG. 6 is a diagram showing a signal transmission method in an embodiment of the second aspect of the present invention. As shown in FIG. 6, the method includes the following operations.

[0071] Operation 601: The first terminal device sets the value or priority of the cyclic prefix extension (CPE) corresponding to the current transmission data of the first terminal device based on the value of the CPE corresponding to other transmission data in the same time unit as the resource used by the current transmission data, and the value of the first CPE, where the other transmission data is data transmitted by a second terminal device; and Operation 602: The first terminal device performs sidelink signal transmission based on the CPE.

[0072] According to an embodiment of the second aspect of the present invention, by setting the value of the CPE of the current transmission data in consideration of information of other transmission data that is frequency division multiplexed (FDM), it is advantageous for different terminal devices to perform SL transmission in the FDM manner, which can lead to an improvement in frequency spectrum efficiency.

[0073] In the embodiment of the second aspect, since the other transmission data and the resource used by the current transmission data are in the same time unit, the other transmission data and the current transmission data are transmitted in a frequency division multiplexing (FDM) manner.

[0074] In the embodiment of the second aspect, the value of the first CPE refers to the value of the CPE determined by the first terminal device, or the CPE value selected from the set of CPE values determined by the first terminal device. For example, the first terminal can determine the value of the CPE or determine the set of CPE values by the method described in the embodiment of the first aspect.

[0075] Among them, the CPE value selected from the set of determined CPE values includes a value selected from the set of CPE values based on implementation (for example, randomly selected), or the maximum value or the minimum value in the set of CPE values.

[0076] In the SL-U scenario, the first terminal device can perform the sensing + resource selection process defined in 3GPP Release 16 (R16) NR V2X, and when transmitting or before transmitting using the resources selected by this process, obtain the resource reservation status of other terminal devices based on the previous sensing result, so as to determine whether the resource is frequency division multiplexed (FDM) with the resources reserved by other terminal devices (for example, UEs). In the case of no, the value of the CPE of the transmission-waiting data corresponding to the current resource can be determined by the method in the embodiment of the first aspect (or other methods), and LBT can be performed before transmission. When access is successful, side-link (SL) transmission is performed using the resource and the corresponding CPE value. Otherwise (that is, in the case of yes), the value of the CPE of the current transmission-waiting data is set by the signal transmission method provided in the embodiment of the second aspect, and then SL transmission can be performed.

[0077] For example, the operation of the first terminal is The first terminal device determines the value of the CPE (that is, the value of the first CPE) adopted by the current transmission data (that is, the transmission-waiting data). Among them, the first terminal can determine the value of the CPE by the method of operation 301 in the embodiment of the first aspect or other methods; The first terminal device determines the value of the CPE corresponding to other transmission data that is in the same time unit (e.g., the same slot or the same symbol) as the resource used by the current transmission data. Among them, the resource information used by the other transmission data may be obtained by the first terminal device decoding the corresponding resource reservation SCI before these other transmission data in the sensing process. The reservation may be a reservation for the retransmission resource, or may be a reservation for the resource for the subsequent period of periodic transmission, etc.; and The first terminal device adopts the above operation 601 to set the value of the CPE corresponding to the current transmission data.

[0078] In the first implementation manner of operation 601, when the value of the CPE corresponding to at least one other transmission data is greater than the value of the first CPE, the first terminal device sets the value of the CPE corresponding to the current transmission data as the maximum value among the values of the CPEs corresponding to at least one other transmission data. When the values of the CPEs corresponding to the other transmission data are all less than or equal to the value of the first CPE, the first terminal device sets the value of the first CPE as the value of the CPE corresponding to the current transmission data.

[0079] For example, when one or more of the values of the CPEs corresponding to the other transmission data are greater than the value of the first CPE, the first terminal device adjusts / sets / modifies the value of the CPE of the current transmission data to the maximum value among the values of the CPEs corresponding to the other transmission data FDM with the current transmission data. When there is no other transmission that is FDM with the current transmission and the corresponding CPE value is greater than the current transmission, the first terminal device sets the value of the first CPE as the value of the CPE adopted by the current transmission data.

[0080] FIG. 7 is a diagram showing that the first terminal device causes the value of the CPE corresponding to the current transmission data to be set in operation 601. As shown in FIG. 7, the current transmission data of the first terminal device is SL#2, the value of the corresponding first CPE is CPE#2, the other transmission data are SL#1 and SL#3, and the corresponding CPE values are CPE#1 and CPE#3. Among them, the terminal devices transmitting SL#1 and SL#3 are, for example, the second terminal device #1 and the second terminal device #3, respectively. The resources used by SL#1, SL#2, and SL#3 are in the same time unit, and CPE#1 < CPE#2 < CPE#3. Therefore, the first terminal device adjusts the value of the CPE corresponding to the current transmission data from the value CPE#2 of the first CPE to the maximum value among the values of the CPEs corresponding to the other transmission data, that is, CPE#3. Also, the terminal device (for example, the second terminal device #1) transmitting the other transmission data SL#1 can also adjust the value of the CPE corresponding to the other transmission data SL#1 from CPE#1 to CPE#3 by adopting operation 601.

[0081] In the second implementation manner of operation 601, the first terminal device may set the value of the CPE corresponding to the current transmission data to the maximum value among the values of the CPEs corresponding to the transmission data having the first identifier (ID) among the other transmission data. Among them, the first identifier is used to indicate that the second terminal device performs data transmission when sharing the continuous occupancy time (COT) of the start of the third terminal device, that is, the first identifier is used to indicate that the second terminal device is in the INside COT.

[0082] FIG. 8 is a diagram showing that the first terminal device, the second terminal device, and the third terminal device share the COT.

[0083] As shown in FIG. 8, the second terminal device 802 performs data transmission when sharing the COT started by the third terminal device 803, that is, the second terminal device is in the INside COT.

[0084] As shown in FIG. 8, when the first terminal device 801 shares the COT started by the second terminal device 802, the first terminal device can transmit the current data, that is, the first terminal device can transmit the current data when it is inside the COT. When the first terminal device 801 also starts the COT, the first terminal device can transmit the current data, that is, the first terminal device can transmit the current data when it is outside the COT.

[0085] In the second embodiment, by setting the maximum value among the CPE values corresponding to a certain transmission data in the case of Inside COT as the CPE value corresponding to the current transmission data, the priority of transmission in Inside COT can be made higher than that of transmission in Outside COT. In the second embodiment, the current transmission data is the transmission data when the first terminal device starts the continuous occupancy time (COT) (that is, the first terminal device is in the case of OUTside COT), or the current transmission data is the transmission data when the first terminal device shares the COT started by the second terminal device (that is, the first terminal device is in the case of INside COT).

[0086] For example, in the second embodiment, among other transmission data, the first terminal device selects the CPE value of the resource corresponding to the transmission data that has the first identifier (e.g., INside COT) and has the maximum CPE value (even if there is other transmission data with a larger CPE value, when the identifier of the other transmission data is OUTtside COT, the CPE value of the other transmission data is not selected), and sets it as the CPE value corresponding to the current transmission data of the first terminal device. Specifically, the CPE values of other transmission data may be obtained by the method in the example of the first aspect, and the identifier of INside COT or OUTside COT may be indicated by the SCI, and the SCI is the corresponding SCI for providing reserved resources for the other transmission data before the other transmission data. Further, even if the CPE value of the current transmission data is larger than the maximum CPE value (or the maximum CPE value of the corresponding transmission data labeled as INside COT) of the other transmission data multiplexed with it, when the current transmission data is transmission data in the case of OUTside COT, the CPE value is decreased, and it is set as the CPE value of the resource corresponding to the transmission data whose label is INside COT and whose CPE value is the largest among the transmissions multiplexed with it.

[0087] In the third embodiment of operation 601, when the current transmission data is transmission data that shares the continuous occupancy time (COT) started by the second terminal device by the first terminal device (that is, when the current transmission data is transmission data in the case of Inside COT), the first terminal device sets the CPE value corresponding to the current transmission data to the CPE value determined by the instruction information of the second terminal device transmission. The instruction information is carried by, for example, the SCI.

[0088] For example, when the current transmission data is the transmission data in the case of OUTside COT, the first terminal device performs adjustment / setting / change of the CPE corresponding to the current transmission data according to the above-described first embodiment or second embodiment. Also, when the current transmission data is the transmission data in the case of INside COT, the first terminal device does not perform adjustment / setting / change of the CPE. For example, a terminal device (e.g., the second terminal device) that starts COT sharing indicates that the second terminal device performs COT sharing with the first terminal device and indicates the magnitude of the CPE value and related information (e.g., by SCI).

[0089] In the fourth embodiment of operation 601, the first terminal device can perform adjustment / setting / change of the CPE according to the priority value indicated in the sidelink control information (SCI). For example, among all other transmission data that is frequency-division multiplexed (FDM) with the current transmission data, the first terminal device can perform adjustment / setting / change of the CPE value only according to the transmission data with the lowest priority value (the corresponding highest priority). For example, the value of the first CPE of the current transmission data can be adjusted / set / changed to the CPE value corresponding to the other transmission data with the lowest priority value.

[0090] According to an embodiment of the second aspect of the present invention, by setting the CPE value of the current transmission data in consideration of information on other transmission data that is frequency-division multiplexed (FDM), it is advantageous for different terminal devices to perform sidelink (SL) transmission in the FDM manner, which can lead to an improvement in the frequency spectrum efficiency in the sidelink communication scenario.

[0091] <Embodiment of the Third Aspect> Regarding at least the same problem as in the embodiment of the first aspect or the embodiment of the second aspect, an embodiment of the third aspect of the present invention provides a method of transmitting a signal, which is applied to a first terminal device. The first terminal device performs sidelink (SL) communication. For example, the method of transmitting the signal is applied to the SL-U scenario.

[0092] The embodiments of the third aspect are extensions to the embodiments of the first aspect and the embodiments of the second aspect.

[0093] In the embodiments of the third aspect, the value of the CPE determined by the first terminal device does not have to be one, and can be the set or subset of all selectable CPE values, that is, the set of CPE values. When the set of CPE values is determined, the first terminal device can select one CPE value from the set for the transmission of current transmission data (i.e., data waiting to be transmitted) (for example, randomly select or select in other ways).

[0094] For example, in the following cases, the value of the CPE determined by the first terminal device does not have to be one, that is, the first terminal device occupies the frequency domain resources of the entire LBT bandwidth; and / or the first terminal device does not discover through the sensing process that the resource reservation of other UEs is FDM in the same slot as the current transmission; and / or the current transmission of the first terminal device is periodic transmission, and the UE makes a random selection once from the set determined in each periodic transmission; and / or the first terminal device works in the manner of transmission resource random selection + LBT, that is, the first terminal device does not perform the operation of obtaining sidelink resources by "sensing + selection".

[0095] FIG. 9 is a diagram showing that in the case of periodic transmission, the first terminal device selects a CPE value from the set of CPE values for each periodic transmission.

[0096] As shown in FIG. 9, SL#1 is the data periodically transmitted by the first terminal device #1. For each transmission of SL#1, the first terminal device #1 randomly selects CPE#1 or CPE#2 from the first set of CPE values Value set #1 = {CPE#1, CPE#2} to perform the transmission of SL#1.

[0097] SL#12 is the data periodically transmitted by the first terminal device #2. For each transmission of SL#2, the first terminal device #2 randomly selects CPE#2 or CPE#3 from the set of second CPE values Value set #2 = {CPE#2, CPE#3} to perform the transmission of SL#2.

[0098] As shown in FIG. 9, the transmission resources of SL#1 and SL#2 are within the same slot. CPE#1 is smaller than CPE#2, and CPE#2 is smaller than CPE#3. In the first transmission in FIG. 9, since the CPE values of SL#1 and SL#2 are CPE#1 and CPE#2 respectively, SL#2 is transmitted and SL#1 is not transmitted. In the second transmission in FIG. 9, since the CPE values of SL#1 and SL#2 are CPE#2 and CPE#3 respectively, SL#2 is transmitted and SL#1 is not transmitted. In the third transmission in FIG. 9, since the CPE values of SL#1 and SL#2 are both CPE#2, both SL#2 and SL#1 are transmitted, that is, SL#2 and SL#1 are FDM. Thereby, the system frequency spectrum efficiency can be improved.

[0099] In the embodiment of the third aspect, for the extension of the embodiment of the first aspect, the implementation method B in the embodiment of the first aspect can be referred to. For example, based on the mapping relationship between the information of the data waiting to be transmitted (such as priority and / or PDB) and the set of CPE values, the corresponding set is determined. Among them, the lower the priority value (that is, the higher the priority), the larger the CPE value in the corresponding CPE value set. Also, for example, a (pre-)definition / (pre-)setting can be performed by referring to the method of indirect mapping according to the Δ value in the embodiment of the first aspect, or the implementation method for the case where {InsideCOT, OutsideCOT} is different in the embodiment of the first aspect can also be referred to.

[0100] In the embodiment of the third aspect, regarding the extension of the embodiment of the second aspect, in a certain transmission by the terminal device (for example, the first terminal device #1), one CPE value is selected from the set, and in the corresponding SCI of the reserved next transmission, one CPE value in the set is selected and indicated based on the implementation (for example, indicated by the SCI), or the maximum value or the minimum value in the set may be indicated (for example, indicated by the SCI). The terminal device that detects that the reserved resource is transmitted by FDM is, for example, the first terminal device #2. Among them, regarding the first terminal device #2, the first terminal device #1 corresponds to the second terminal device in the embodiment of the second aspect. The first terminal device #2 can adjust / set / change the value of the first CPE of the first terminal device #2 by using the indicated CPE value according to the method in the second aspect of the embodiment, whereby the first terminal device #2 can perform FDM with the first terminal device #1.

[0101] In the embodiment of the third aspect, regarding the extension of the embodiment of the second aspect, in a certain transmission by the terminal device (for example, the first terminal device #1), one CPE value is selected from the set, and what is indicated in the corresponding SCI of the reserved next transmission (for example, indicated by the SCI) is the set of CPE values selected by the terminal device. The terminal device that detects that the reserved resource is transmitted by FDM is, for example, the first terminal device #2. Among them, regarding the first terminal device #2, the first terminal device #1 corresponds to the second terminal device in the embodiment of the second aspect. The first terminal device #2 can adjust / set / change the value of the first CPE of the first terminal device #2 to the minimum value of the CPE values in the set of CPE values, or the value determined based on the implementation, or the maximum value, whereby the probability that the first terminal device #2 performs FDM with the first terminal device #1 can be improved.

[0102] <Embodiment of the Fourth Aspect> In the embodiment of the present invention, a device for transmitting a signal is provided, which is applied to a first terminal device, and the first terminal device performs sidelink communication.

[0103] FIG. 10 is a diagram showing a signal transmission device in an embodiment of a fourth side surface. As shown in FIG. 10, the device 1000 for transmitting the signal includes a first transmission unit 1001, and the first transmission unit 1001 determines information on cyclic prefix extension (CPE) based on information on data waiting to be transmitted; and is configured to perform sidelink signal transmission based on the CPE.

[0104] In at least one embodiment, the information on the data waiting to be transmitted includes the priority of the data waiting to be transmitted and / or the PDB (PDB, package delay budget) of the data waiting to be transmitted, the information on the CPE includes the value of the CPE or the value of a first parameter, and the value of the first parameter is used for calculating the value of the CPE.

[0105] In at least one embodiment, the lower the value of the priority of the data waiting to be transmitted, the larger the value of the CPE, and the smaller the PDB of the data waiting to be transmitted, the larger the value of the CPE.

[0106] In at least one embodiment, there is a mapping relationship between the information on the data waiting to be transmitted and the value of the CPE or the value of the first parameter.

[0107] In at least one embodiment, when the first terminal device starts a continuous occupancy time (COT), the first transmission unit determines the value of the CPE based on the mapping relationship.

[0108] In at least one embodiment, when the first terminal device shares a continuous occupancy time (COT) started by another terminal device different from the first terminal device, the first transmission unit determines the value of the CPE based on the instruction information of the other terminal device transmission. The instruction information is carried in, for example, sidelink control information (SCI).

[0109] In at least one embodiment, the mapping relationship is The mapping relationship between the information of the data to be transmitted and the CPE value when the first terminal device starts a COT, and the CPE value when the first terminal device shares a COT started by another terminal device different from the first terminal device; or The mapping relationship between the information of the data to be transmitted and the value of the first parameter when the first terminal device starts a COT, and the value of the first parameter when the first terminal device shares a COT started by another terminal device different from the first terminal device is included.

[0110] In at least one embodiment, the determination of the CPE value has a mapping relationship between the information of the data to be transmitted and the first set of CPE values or the second set of values of the first parameter. The first transmission unit selects a CPE value from the first set as the determined CPE value, or calculates the determined CPE value using the value of the first parameter selected by the first transmission unit from the second set.

[0111] In at least one embodiment, when the first terminal device starts a continuous occupancy time (COT), the first transmission unit determines the first set based on the mapping relationship.

[0112] In at least one embodiment, when the first terminal device shares a continuous occupancy time (COT) started by another terminal device different from the first terminal device, the first transmission unit determines the first set based on the indication information transmitted by the other terminal device. Among them, the indication information is carried by, for example, sidelink control information (SCI).

[0113] In at least one embodiment, the mapping relationship is The mapping relationship between the information of the data to be transmitted and the first set when the first terminal device starts a COT and the first set when the first terminal device shares a COT started by another terminal device different from the first terminal device; or The mapping relationship between the information of the data to be transmitted and the second set when the first terminal device starts a COT and the second set when the first terminal device shares a COT started by another terminal device different from the first terminal device is included.

[0114] In at least one embodiment, the determined value of the CPE or the value of the first parameter may be indicated by sidelink control information (SCI).

[0115] In at least one embodiment, the determined first set or second set, or the value of one CPE in the determined first set or the value of one first parameter in the determined second set may be indicated by sidelink control information (SCI).

[0116] In at least one embodiment, the value of the one CPE includes the maximum value or the minimum value in the first set, or a value selected based on implementation.

[0117] <Embodiment of the fifth aspect> In an embodiment of the present invention, a device for transmitting a signal is provided, which is applied to a first terminal device, and the first terminal device performs sidelink communication.

[0118] FIG. 11 is a diagram showing a signal transmission device in an embodiment of the fifth aspect. As shown in FIG. 11, the device 1100 for transmitting a signal includes a second transmission unit 1101. The second transmission unit 1101 is based on the value or priority of a cyclic prefix extension (CPE) corresponding to other transmission data in the same time unit as the resource used by the current transmission data, and the value of the first CPE, and sets the value of the CPE corresponding to the current transmission data of the first terminal device; and is configured to perform sidelink signal transmission based on the CPE, wherein the other transmission data is data transmitted by a second terminal device.

[0119] In at least one embodiment, when the value of the CPE corresponding to at least one other transmission data is greater than the value of the first CPE, the second transmission unit sets the value of the CPE corresponding to the current transmission data to the maximum value among the values of the CPE corresponding to the at least one other transmission data.

[0120] In at least one embodiment, when all the values of the CPE corresponding to the other transmission data are less than or equal to the value of the first CPE, the second transmission unit sets the value of the first CPE as the value of the CPE corresponding to the current transmission data.

[0121] In at least one embodiment, the second transmission unit sets the value of the CPE corresponding to the current transmission data as the maximum value among the values of the CPE corresponding to the transmission data having the first identifier among the other transmission data, and the first identifier is used to indicate that data transmission is performed when the second terminal device shares the continuous occupancy time (COT) of the third terminal device start.

[0122] In at least one embodiment, the current transmission data is the transmission data when the first terminal device starts the continuous occupancy time (COT), or the current transmission data is the transmission data when the first terminal device shares the COT started by the second terminal device.

[0123] In at least one embodiment, when the current transmission data is the transmission data when the first terminal device shares the continuous occupancy time (COT) started by the second terminal device, the second transmission unit sets the value of the CPE corresponding to the current transmission data as the value of the CPE determined based on the indication information of the second terminal device transmission. The indication information may be carried in the SCI.

[0124] In at least one embodiment, the value of the first CPE refers to the value of the CPE determined by the first terminal device, or the value of the CPE selected from the set of CPE values determined for the first terminal device.

[0125] In at least one embodiment, the value of the CPE selected from the set of determined CPE values includes a value selected from the set based on the implementation, or the maximum value in the set, or the minimum value in the set.

[0126] <Embodiment of the sixth aspect> In an embodiment of the present invention, a communication system is further provided, which may include a terminal device at the transmitting end and a terminal device at the receiving end for performing sidelink communication. Among them, the terminal device at the transmitting end and the terminal device at the receiving end may adopt the configuration of the same terminal device. The terminal device at the transmitting end is, for example, the first terminal device.

[0127] FIG. 12 is a diagram showing a terminal device in an embodiment of the sixth aspect. The terminal device shown in FIG. 12 may be used for the terminal device at the transmitting end or may be used for the terminal device at the receiving end.

[0128] FIG. 12 is a diagram showing a terminal device in an embodiment of the sixth aspect. As shown in FIG. 12, the terminal device 1200 may include a processor 1210 (for example, a central processing unit CPU) and a memory 1220, and the memory 1220 is connected to the processor 1210. Among them, the memory 1220 can store various data, and can further store a program 1230 for information processing, and can execute the program 1230 under the control of the processor 1210.

[0129] For example, the processor 1210 may be configured to execute a program to implement the methods described in the embodiments of the first aspect, the second aspect, or the third aspect.

[0130] Also, as shown in FIG. 12, the terminal 1200 may further include a transceiver 1240, an antenna 1250, etc. Among them, since the functions of these components are similar to those of the prior art, the detailed description thereof is omitted here. Note that the terminal device 1200 does not necessarily include all the components shown in FIG. 12. Also, the terminal device 1200 may further include components not shown in FIG. 12, and for this, reference can be made to the prior art.

[0131] In an embodiment of the present invention, a computer program is further provided. When the program is executed on a terminal device, the program causes the terminal device to execute the methods described in the embodiments of the first, second, and third aspects.

[0132] In an embodiment of the present invention, a storage medium storing a computer program is further provided. The computer program causes a terminal device to execute the methods described in the embodiments of the first, second, and third aspects when executed.

[0133] Also, the above-described apparatus and method may be implemented by software or hardware, or may be implemented by a combination of hardware and software. The present invention further relates to a computer-readable program as follows, that is, when the program is executed by a logic component, the logic component implements the above-described apparatus or component, or the logic component implements the various methods or steps described above. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, a processor used in a computer, or the like. The present invention further relates to a storage medium storing the above-described program, such as a hard disk, a magnetic disk, an optical hard disk, a DVD, a flash memory, or the like.

[0134] Furthermore, one or more combinations of the functional blocks described in the drawings and / or one or more combinations of the functional blocks may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic component, discrete gate or transistor logic component, discrete hardware assembly or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks described in the drawings and / or one or more combinations of the functional blocks may further be configured as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors connected communicatively to a DSP or any other combination of configurations.

[0135] As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to such embodiments, and any changes to the present invention belong to the technical scope of the present invention as long as they do not depart from the spirit of the present invention.

[0136] Also, regarding the above-described embodiments and the like, the following additional remarks are disclosed.

[0137] (Appendix 1) A method for transmitting a signal, applied to a first terminal device, the first terminal device performing sidelink communication, the method comprising: the first terminal device determining cyclic prefix extension (CPE) information based on information of data waiting to be transmitted; and the first terminal device performing sidelink signal transmission based on the CPE.

[0138] (Appendix 2) The method according to Appendix 1, wherein the information of the data waiting to be transmitted includes the priority of the data waiting to be transmitted and / or the PDB (package delay budget) of the data waiting to be transmitted. The information of the CPE includes the value of the CPE or the value of the first parameter, and the value of the first parameter is used to calculate the value of the CPE, method.

[0139] (Appendix 3) The method according to Appendix 2, wherein the lower the value of the priority of the data waiting to be transmitted, the larger the value of the CPE, the smaller the PDB of the data waiting to be transmitted, the larger the value of the CPE, method.

[0140] (Appendix 4) The method according to any one of Appendices 1 to 3, wherein there is a mapping relationship between the information of the data waiting to be transmitted and the value of the CPE or the value of the first parameter, method.

[0141] (Appendix 5) The method according to Appendix 4, wherein when the first terminal device starts a continuous occupancy time (COT), the first terminal device determines the value of the CPE based on the mapping relationship, method.

[0142] (Appendix 6) The method according to Appendix 5, wherein when the first terminal device shares a continuous occupancy time (COT) started by another terminal device different from the first terminal device, the first terminal device determines the value of the CPE based on the instruction information carried by the sidelink control information (SCI) transmitted by the other terminal device, method.

[0143] (Appendix 7) The method according to Appendix 4, wherein the mapping relationship is the mapping relationship between the information of the data waiting to be transmitted and the value of the CPE when the first terminal device starts a COT and the value of the CPE when the first terminal device shares a COT started by another terminal device different from the first terminal device; or The mapping relationship between the information of the data waiting to be transmitted, the value of the first parameter when the first terminal device starts a COT, and the value of the first parameter when the first terminal device shares a COT started by another terminal device different from the first terminal device A method including the above.

[0144] (Appendix 8) The method according to any one of Appendices 1 to 3, wherein The determination of the CPE value There is a mapping relationship between the information of the data waiting to be transmitted and the first set of CPE values or the second set of values of the first parameter, and the first terminal device selects a CPE value from the first set as the determined CPE value, or the first terminal device uses a value of a parameter selected from the second set to calculate the determined CPE value. A method including this.

[0145] (Appendix 9) The method according to Appendix 8, wherein When the first terminal device starts a continuous occupancy time (COT), the first terminal device determines the first set based on the mapping relationship. A method.

[0146] (Appendix 10) The method according to Appendix 9, wherein When the first terminal device shares a continuous occupancy time (COT) started by another terminal device different from the first terminal device The first terminal device determines the first set based on the instruction information carried by the sidelink control information (SCI) transmitted by the other terminal device. A method.

[0147] (Appendix 11) The method according to Appendix 8, wherein The mapping relationship The mapping relationship between the information of the data waiting to be transmitted, the first set when the first terminal device starts a COT, and the first set when the first terminal device shares a COT started by another terminal device different from the first terminal device; or The mapping relationship between the information of the data waiting to be transmitted, the second set when the first terminal device starts a COT, and the second set when the first terminal device shares a COT started by another terminal device different from the first terminal device A method comprising the above.

[0148] (Appendix 12) The method according to Appendices 1 to 7, wherein the method further comprises the first terminal device instructing the value of the CPE or the value of the first parameter determined by side link control information (SCI). A method comprising the above.

[0149] (Appendix 13) The method according to Appendices 8 to 11, wherein the method further comprises the first terminal device instructing the first set or the second set determined by side link control information (SCI); or the first terminal device instructing the value of one CPE in the first set or the value of one first parameter in the second set determined by side link control information (SCI). A method comprising the above.

[0150] (Appendix 14) The method according to Appendix 13, wherein the value of the one CPE includes the maximum value or the minimum value in the first set, or a value selected based on implementation. A method comprising the above.

[0151] (Appendix 15) A method for transmitting a signal, applied to a first terminal device, the first terminal device performing side link communication, the method comprising setting the value of the CPE corresponding to the current transmission data of the first terminal device based on the value or priority of the cyclic prefix extension (CPE) corresponding to other transmission data in the same time unit as the resource used by the current transmission data of the first terminal device, and the value of the first CPE; and including the first terminal device performing sidelink signal transmission based on the CPE; a method, wherein the other transmission data is data transmitted by a second terminal device.

[0152] (Appendix 16) a method according to Appendix 15, wherein when the value of the CPE corresponding to at least one other transmission data is greater than the value of the first CPE, the first terminal device sets the value of the CPE corresponding to the current transmission data as the maximum value among the values of the CPEs corresponding to the at least one other transmission data.

[0153] (Appendix 17) a method according to Appendix 15, wherein when none of the values of the CPEs corresponding to the other transmission data is greater than the value of the first CPE, the first terminal device sets the value of the first CPE as the value of the CPE corresponding to the current transmission data.

[0154] (Appendix 18) a method according to Appendix 15, wherein the first terminal device sets the value of the CPE corresponding to the current transmission data as the maximum value among the values of the CPEs corresponding to the transmission data having a first identifier among the other transmission data, wherein the first identifier is used to indicate that the second terminal device performs data transmission when sharing the continuous occupancy time (COT) of the start of a third terminal device.

[0155] (Appendix 19) a method according to Appendix 18, wherein the current transmission data is transmission data when the first terminal device starts a continuous occupancy time (COT), or wherein the current transmission data is transmission data when the first terminal device shares the COT started by the second terminal device.

[0156] (Appendix 20) a method according to Appendix 15, When the current transmission data is the transmission data when the first terminal device shares the continuous occupancy time (COT) of the start of the second terminal device, A method in which the first terminal device sets the value of the CPE corresponding to the current transmission data to the value of the CPE determined based on the instruction information carried by the SCI of the second terminal device transmission.

[0157] (Appendix 21) The method according to any one of Appendices 15 to 20, The value of the first CPE refers to the value of the CPE determined by the first terminal device or the value of the CPE selected from the set of CPE values determined by the first terminal device.

[0158] (Appendix 22) The method according to Appendix 21, The value of the CPE selected from the set of determined CPE values includes the value selected from the set based on the implementation, or the maximum value in the set, or the minimum value in the set.

Claims

1. A device for transmitting a signal, applied to a first terminal device, comprising: a processor and a transmitter, wherein the processor is configured to determine cyclic prefix extension (CPE) information based on information of data waiting to be transmitted, the CPE information includes a value of the CPE, there is a mapping relationship between the information of the data waiting to be transmitted and a first set of CPE values, the transmitter is configured to perform sidelink signal transmission based on the CPE, the processor is further configured to randomly select one CPE value from the first set as the determined CPE information, wherein the information of the data waiting to be transmitted includes the priority of the data waiting to be transmitted.

2. The device according to claim 1, wherein the lower the value of the priority of the data waiting to be transmitted, the larger the value of the CPE, and the smaller the PDB (package delay budget) of the data waiting to be transmitted, the larger the value of the CPE.

3. The device according to claim 1, wherein there is a mapping relationship between the information of the data waiting to be transmitted and the value of the CPE.

4. The device according to claim 3, wherein when the first terminal device starts a continuous occupancy time (COT), the processor determines the value of the CPE based on the mapping relationship.

5. The device according to claim 3, wherein the mapping relationship is a mapping relationship between the information of the data waiting to be transmitted and the value of the CPE when the first terminal device starts a COT and the value of the CPE when the first terminal device shares a COT started by a second terminal device different from the first terminal device.

6. The device according to claim 1, wherein when the first terminal device starts a continuous occupancy time (COT), the processor determines the first set based on the mapping relationship.

7. The device according to claim 1, wherein when the first terminal device shares a continuous occupancy time (COT) started by a second terminal device different from the first terminal device, the processor determines the first set based on indication information carried by sidelink control information (SCI) transmitted by the second terminal device.

8. The device according to claim 1, wherein the mapping relationship is An apparatus comprising a mapping relationship between information on the data waiting to be transmitted, a first set when the first terminal device starts a Cycle of Transmission (COT), and a first set when the first terminal device shares a COT started by a second terminal device different from the first terminal device.

9. The apparatus according to claim 1, wherein the determined information on the CPE is indicated by sidelink control information (SCI).

10. An apparatus for transmitting a signal, applied to a first terminal device, comprising a processor and a transmitter, wherein the processor is configured to determine information on Cyclic Prefix Extension (CPE) based on information on the data waiting to be transmitted, the information on the CPE including a value of the CPE, the transmitter being configured to perform sidelink signal transmission based on the CPE, wherein there is a mapping relationship between the information on the data waiting to be transmitted and the value of the CPE, the information on the data waiting to be transmitted including the priority of the data waiting to be transmitted.

11. The apparatus according to claim 10, wherein when the first terminal device starts a Cycle of Transmission (COT), the processor determines the value of the CPE based on the mapping relationship.

12. The apparatus according to claim 10, wherein the mapping relationship includes a mapping relationship between the information on the data waiting to be transmitted, the value of the CPE when the first terminal device starts a COT, and the value of the CPE when the first terminal device shares a COT started by a second terminal device different from the first terminal device.

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