Signal transmission method and device, equipment and storage medium

Abstract

The invention discloses a signal transmission method and device, equipment and a medium, and belongs to the field of communication. The method is executed by first UE, and the method comprises the following steps: in the case of LBT failure in a first shared frequency domain resource, not sending a reference signal, or sending the reference signal in a second shared frequency domain resource; wherein the first shared frequency domain resource comprises a shared frequency domain resource which needs to be occupied by the reference signal, and the second shared frequency domain resource is a shared frequency domain resource with successful LBT in the first shared frequency domain resource. A feasible signal transmission scheme is provided for the condition that LBT happens to the shared frequency domain resources, and guarantees in the aspects of quality, time delay, efficiency and the like are provided for communication services and non-communication services on the shared frequency spectrum.

Description

Signal transmission method, device, equipment and storage medium Technical Field The present application relates to the field of communications, and in particular to a signal transmission method, device, equipment and storage medium. Background Art Before transmitting a signal in a shared spectrum or unlicensed frequency band, the signal sender needs to perform Listen Before Talk (LBT). If LBT fails, the signal cannot be transmitted. However, when the bandwidth required by the signal is large, the possibility of LBT failure is greater, and the signal sender is likely to enter an infinite loop of LBT failure and fail to successfully transmit the signal. Therefore, there is no feasible solution for the sender's signal transmission behavior when facing LBT failure in shared spectrum or unlicensed bands. Summary of the invention The present application provides a signal transmission method, apparatus, device and storage medium, and the technical solution at least includes: According to one aspect of an embodiment of the present application, a signal transmission method is provided, the method being performed by a first terminal device (User Equipment, UE), the method comprising: In the case where an LBT failure occurs in the first shared frequency domain resource, not sending the first signal, or sending the first signal in the second shared frequency domain resource; The first shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy, and the second shared frequency domain resources are the shared frequency domain resources in which LBT succeeds in the first shared frequency domain resources. According to another aspect of an embodiment of the present application, a signal transmission method is provided, the method being performed by a network device, the method comprising: First configuration information is sent to a first UE, where the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource, and the parameters are related to the transmission behavior of the first UE when an LBT failure occurs in the first shared frequency domain resource. According to another aspect of an embodiment of the present application, a signal transmission method is provided, the method being performed by a second UE or a network device, the method including: Receiving and / or measuring a first signal sent by a first UE in a second shared frequency domain resource, where the first signal is sent by the first UE when an LBT failure occurs in the first shared frequency domain resource; The second shared frequency domain resources are shared frequency domain resources where LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include shared frequency domain resources that the first signal needs to occupy. According to another aspect of an embodiment of the present application, a signal transmission device is provided, the device comprising: A sending module, configured to, when an LBT failure occurs in a first shared frequency domain resource, not send a first signal, or send the first signal in a second shared frequency domain resource; The first shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy, and the second shared frequency domain resources are the shared frequency domain resources in which LBT succeeds in the first shared frequency domain resources. According to another aspect of an embodiment of the present application, a signal transmission device is provided, the device comprising: A sending module is used to send first configuration information to a first UE, where the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource, and the parameters are related to the transmission behavior of the first UE when an LBT failure occurs in the first shared frequency domain resource. According to another aspect of an embodiment of the present application, a signal transmission device is provided, the device comprising: a receiving module and / or a processing module, the receiving module being configured to receive a first signal sent by a first UE in a second shared frequency domain resource, the processing module being configured to measure the first signal sent by the first UE in the second shared frequency domain resource, the first signal being sent by the first UE when an LBT failure occurs in the first shared frequency domain resource; The second shared frequency domain resources are shared frequency domain resources where LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include shared frequency domain resources that the first signal needs to occupy. According to one aspect of an embodiment of the present application, a communication device is provided, the communication device comprising: processor; a receiver and / or transmitter connected to the processor; a memory for storing executable instructions for the processor; Wherein, the communication device is used to implement the signal transmission method as described above. According to one aspect of the present application, a computer-readable storage medium is provided, in which executable instructions are stored. The executable instructions are loaded and executed by the processor to implement the signal transmission method as described in the above aspect. According to one aspect of the present application, a computer program product is provided, wherein the computer program product comprises computer instructions. The computer instructions are stored in a computer-readable storage medium, and the processor of the computer device reads the computer instructions from the computer-readable storage medium. The processor executes the computer instructions, so that the computer device executes to implement the signal transmission method as described in the above aspects. According to one aspect of the present application, a chip is provided, which includes a programmable logic circuit and / or program instructions, and when the chip is running, it is used to implement the signal transmission method described in the above aspects. According to one aspect of the present application, a computer program is provided, wherein the computer program includes computer instructions, and a processor of a computer device executes the computer instructions so that the computer device executes the signal transmission method as described in the above aspect. The technical solution provided by the embodiments of the present application may have the following beneficial effects: It supports the first UE not to send the first signal when LBT fails in the shared frequency domain resources, or to send the first signal in the shared frequency domain resources where LBT succeeds, provides a feasible signal transmission solution when LBT occurs in the shared frequency domain resources, and provides quality, latency, efficiency and other aspects of communication services and non-communication services on the shared spectrum. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work. FIG1 is a schematic diagram showing a LBT failure provided by an exemplary embodiment of the present application; FIG2 is a schematic diagram showing a continuous LBT failure provided by an exemplary embodiment of the present application; FIG3 shows a schematic diagram of NR shared frequency domain resources provided by an exemplary embodiment of the present application; FIG4 shows a schematic diagram of NR shared frequency domain resources provided by an exemplary embodiment of the present application; FIG5 shows a schematic diagram of side-travel shared frequency domain resources provided by an exemplary embodiment of the present application; FIG6 shows a schematic diagram of a reference signal measurement / configuration process provided by an exemplary embodiment of the present application; FIG7 shows a schematic diagram of a network architecture provided by an exemplary embodiment of the present application; FIG8 shows a schematic diagram of a wireless sensing mode provided by an exemplary embodiment of the present application; FIG9 shows a schematic diagram of a wireless communication system provided by an exemplary embodiment of the present application; FIG10 is a schematic diagram showing a terminal device and a network coverage provided by an exemplary embodiment of the present application; FIG11 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG12 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG13 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG14 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG15 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG16 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG17 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG18 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG19 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG20 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG21 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG22 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG23 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application; FIG24 shows a structural block diagram of a signal transmission device provided by an exemplary embodiment of the present application; FIG25 shows a structural block diagram of a signal transmission device provided by an exemplary embodiment of the present application; FIG26 shows a structural block diagram of a signal transmission device provided by an exemplary embodiment of the present application; FIG. 27 shows a schematic diagram of the structure of a communication device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION In order to make the purpose, technical scheme and advantages of the present application clearer, the implementation mode of the present application will be further described in detail below in conjunction with the accompanying drawings. The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation modes described in the following exemplary embodiments do not represent all implementation modes consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items. It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, these information should not be limited to these terms. These terms are used only to distinguish information of the same type from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining". First, the communication technology involved in the embodiments of the present application is introduced: 1. Unlicensed spectrum / shared spectrum Unlicensed spectrum is a spectrum that can be used for radio equipment communications, which is divided by countries and regions. This spectrum is generally considered to be a shared spectrum. As long as the communication equipment meets the regulatory requirements set by the country or region on this spectrum, it can use this spectrum without applying for exclusive spectrum authorization from the country or region's exclusive spectrum management agency. In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist in a friendly manner on the spectrum, some countries or regions have stipulated regulatory requirements that must be met when using unlicensed spectrum. For example, when using unlicensed spectrum for communication, the communication device follows the "Listen Before Talk (LBT)" principle, that is, before the communication device uses the channel on the unlicensed spectrum to send a signal, it needs to perform LBT, or channel monitoring. Only when the channel monitoring result is that the channel is idle or LBT is successful, can the communication device send a signal through the channel. If the channel monitoring result of the communication device on the channel is that the channel is busy or LBT fails, then the communication device cannot send a signal through the channel. In addition, in order to ensure the fairness of the use of shared spectrum resources, if the communication device succeeds in LBT on the channel of the unlicensed spectrum, the duration that the communication device can use the channel for communication transmission cannot exceed a certain duration. This mechanism limits the maximum duration that can be used for communication after a successful LBT, so that different communication devices have the opportunity to access the channel on the shared spectrum, and realize the friendly coexistence of different communication systems on the shared spectrum. 2. Uplink LBT failure detection and recovery mechanism for New Radio Unlicensed (NR-U) spectrum In the NR-U spectrum, a common problem is how to deal with the impact of LBT on various uplink transmissions. In particular, when the terminal equipment (UE) faces continuous LBT failures, how to deal with the problem that the UE cannot seize the channel due to LBT failure, resulting in a "dead loop". In other words, when LBT fails, the UE will continue to attempt uplink transmissions, but these attempts will not succeed due to continuous LBT failures. As shown in Figure 1, when the UE transmits a random access preamble (Random Access Preamble) or a scheduling request (Scheduling Request, SR) transmission, due to the continuous LBT failure, the counter corresponding to the preamble transmission or the counter related to the SR transmission will not count, so the UE will continue to attempt the preamble transmission or SR transmission, causing the Media Access Control (Media Access Control, MAC) layer process to enter an "infinite loop" of uplink transmission. When a persistent LBT failure occurs during any uplink transmission of the UE, a mechanism is needed to resolve the persistent LBT failure problem. Therefore, a persistent uplink LBT failure detection and recovery mechanism is introduced. How to detect persistent upstream LBT failure? In NR-U, all LBT failures caused by uplink transmissions are taken into account in the continuous uplink LBT failure detection, including not only uplink transmissions triggered by the MAC layer, such as SR transmissions, random access-related transmissions, physical uplink shared channel (PUSCH) transmissions based on dynamic scheduling or semi-static scheduling, but also uplink transmissions triggered by the physical layer, such as channel state information (CSI) transmissions, hybrid automatic repeat request (HARQ) feedback, sounding reference signal (SRS), etc. Therefore, the physical layer is required to indicate the result of the corresponding uplink LBT failure to the MAC layer. The physical layer's indication of uplink LBT failure is for each transmission (Per Transmission), that is, the physical layer indicates the LBT failure of each uplink transmission, and an uplink transmission may span different resource block sets (RB-sets). In NR-U, the MAC layer uses a timer to decide whether to trigger a persistent uplink LBT failure. In other words, "persistence" should be limited to a certain time period, rather than any accumulated LBT failures at any time triggering a persistent LBT failure. Specifically, an LBT detection timer can be configured for the UE, and a detection count threshold can be configured. When the number of uplink LBT failures encountered by the UE reaches the configured detection count threshold, a persistent uplink LBT failure is triggered. Otherwise, when the timer times out, the UE needs to reset the LBT failure count. In other words, within a certain period of time, if the number of LBT failures indicated by the physical layer received by the MAC layer does not reach the detection count threshold, the persistent LBT failure will not be triggered, and the LBT failure counter will be reset, that is, the LBT failure count will be cleared to zero and the count will start again. As shown in Figure 2, when the UE fails LBT during uplink transmission, the physical layer indicates to the MAC layer that the LBT corresponding to this transmission has failed. After the MAC layer receives an LBT failure indicated by the physical layer, the LBT failure counter value is incremented by 1. If the number of LBT failures indicated by the physical layer received by the MAC layer during the timing of the LBT detection timer is greater than the configured detection number threshold (for example, 3 times), then a persistent LBT failure is triggered. If the LBT detection timer times out, the LBT failure counter is reset. In addition, in NR-U, the MAC layer counts the number of LBT failures based on the granularity of the uplink bandwidth part (BWP). The UE independently counts the number of LBT failures for each LBT subband on the uplink BWP. Considering that only one BWP can be activated at the same time on each carrier, it can be considered that the number of LBT failures is counted independently for each carrier. Therefore, when counting continuous uplink LBT failures, each carrier can be considered independent, that is, a counter and timer for counting LBT failures can be independently maintained for each uplink carrier. How to recover from a continuous uplink LBT failure? After the continuous uplink LBT failure detection mechanism, the remaining thing is to perform continuous uplink LBT failure recovery. For the design of the recovery mechanism, considering that the continuous uplink LBT failure of different UL BWPs is triggered independently, the recovery mechanism is different for different carriers. First, the UE may attempt to perform a UL BWP switch and attempt to initiate access to a random access channel (RACH) on the new UL BWP. For the primary cell (PCell), when the continuous uplink LBT failure is triggered, the UE can directly trigger the radio link failure (RLF) process, and finally recover the continuous uplink LBT failure problem through the radio resource control (RRC) reestablishment (RRC Reestablishment) process. For the Primary Secondary Cell (PSCell) in dual connectivity, that is, the primary cell of the secondary cell group, when a continuous uplink LBT failure is triggered, considering that the link of the primary cell group is normal, the UE can report the continuous uplink LBT failure event to the network through the PCell of the primary cell group. Generally speaking, the network can solve the continuous uplink LBT failure problem on the PSCell through reconfiguration. For a secondary cell (SCell), when triggering a continuous uplink LBT failure, the UE may report the continuous uplink LBT failure problem by triggering a MAC control element (CE). The above content can be found in English as follows: The lower layer may perform an LBT procedure,see TS 37.213

[0018] ,according to which a transmission is not performed by lower layers if the channel is identified as being occupied.When lower layer performs an LBT procedure before a transmission and the transmission is not performed,an LBT failure indication is sent to the MAC entity from lower layers.Unless otherwise specified,when LBT procedure is performed for a transmission,actions as specified in this specification are performed regardless of if an LBT failure indication is received from lower layers.When LBT is not performed by the lower layers,LBT failure indication is not received from lower layers. LBT failure detection and recovery procedure: The MAC entity may be configured by RRC with a consistent LBT failure recovery procedure.Consistent LBT failure is detected per UL BWP by counting LBT failure indications,for all UL transmissions,from the lower layers to the MAC entity. RRC configures the following parameters in the lbt-FailureRecoveryConfig: -lbt-FailureInstanceMaxCount for the consistent LBT failure detection; -lbt-FailureDetectionTimer for the consistent LBT failure detection; The following UE variable is used for the consistent LBT failure detection procedure: -LBT_COUNTER(per Serving Cell):counter for LBT failure indication which is initially set to 0. For each activated Serving Cell configured with lbt-FailureRecoveryConfig,the MAC entity shall: 1>if LBT failure indication has been received from lower layers: 2>start or restart the lbt-FailureDetectionTimer; 2>increment LBT_COUNTER by 1; 2>if LBT_COUNTER>=lbt-FailureInstanceMaxCount: 3>trigger consistent LBT failure for the active UL BWP in this Serving Cell; 3>if this Serving Cell is the SpCell: 4>if consistent LBT failure has been triggered in all UL BWPs configured with PRACH occasions on same carrier in this Serving Cell: 5>indicate consistent LBT failure to upper layers. 4>else: 5>stop any ongoing Random Access procedure in this Serving Cell; 5>switch the active UL BWP to a UL BWP,on same carrier in this Serving Cell,configured with PRACH occasion and for which consistent LBT failure has not been triggered; 5>initiate a Random Access Procedure(as specified in clause 5.1.1). 1>if all triggered consistent LBT failures are cancelled in this Serving Cell;or 1>if the lbt-FailureDetectionTimer expires;or 1>if lbt-FailureDetectionTimer or lbt-FailureInstanceMaxCount is reconfigured by upper layers: 2>set LBT_COUNTER to 0. The MAC entity shall: 1>if consistent LBT failure has been triggered,and not cancelled,in the SpCell;and 1>if UL-SCH resources are available for a new transmission in the SpCell and these UL-SCH resources can accommodate the LBT failure MAC CE plus its subheader as a result of logical channel prioritization: 2>instruct the Multiplexing and Assembly procedure to generate the LBT failure MAC CE. 1>else if consistent LBT failure has been triggered,and not cancelled,in at least one SCell: 2>if UL-SCH resources are available for a new transmission in a Serving Cell for which consistent LBT failure has not been triggered and these UL-SCH resources can accommodate the LBT failure MAC CE plus its subheader as a result of logical channel prioritization: 3>instruct the Multiplexing and Assembly procedure to generate the LBT failure MAC CE. 2>else: 3>trigger a Scheduling Request for LBT failure MAC CE. 1>if a MAC PDU is transmitted and LBT failure indication is not received from lower layers and this PDU includes the LBT failure MAC CE: 2>cancel all the triggered consistent LBT failure(s)in SCell(s)for which consistent LBT failure was indicated in the transmitted LBT failure MAC CE. 1>if consistent LBT failure is triggered and not canceled in the SpCell; and 1>if the Random Access procedure is considered successfully completed (see clause 5.1) in the SpCell: 2>cancel all the triggered consistent LBT failure(s)in the SpCell. 1>if lbt-FailureRecoveryConfig is reconfigured by upper layers for a Serving Cell: 2>cancel all the triggered consistent LBT failure(s)in this Serving Cell. 3. RB-set of NR-U system Generally speaking, the transmission on the unlicensed spectrum is based on a bandwidth granularity of 20MHz. However, the design of NR has taken into account the needs of large bandwidth and high throughput, so the transmission in the NR-U spectrum should not be limited to a bandwidth granularity of 20MHz. Therefore, the NR-U system supports a larger bandwidth transmission granularity, where the larger bandwidth refers to a bandwidth several times greater than 20MHz. Specifically, in the NR-U system, the UE can be configured with a large bandwidth BWP, which includes multiple 20MHz channel bandwidths. Each 20MHz bandwidth is called an LBT subband in NR-U, and a guard band is provided between the subbands, as shown in Figure 3. Among them, the role of the guard band is to prevent inter-subband interference, which is caused by out-of-band power leakage (Out-of-Band Power Leakage), that is, the energy sent by the terminal on a subband will leak to the adjacent subband, thereby interfering with the transmission on the adjacent subband, where the transmission on the adjacent subband may come from other UEs in the same system or even communication devices in other systems. Each LBT subband includes M interlaced resource blocks (IRB), where M is an integer greater than or equal to 1. The LBT subband is also called RB-set. The configuration method of RB-set and protection band in the NR-U system is shown in Figure 4. The network side first configures a carrier bandwidth based on the common resource block (CRB) benchmark, and configures one or more intra-cell protection bands within the carrier bandwidth. The configuration of the intra-cell protection band includes the CRB position corresponding to the starting point and the length of the protection band. When the configuration is completed, the entire carrier bandwidth is divided into multiple RB-sets. Finally, the network side configures BWP and maps the RB-set to BWP. The BWP configured by the network in the NR-U side must include an integer number of RB-sets. 4. Relationship between RB-set, BWP and resource pool in the sidelink unlicensed (SL-U) system If the SL-U system also needs to support large bandwidth, when configuring the BWP of the SL-U system, the RB-set-based configuration method in the NR-U system can be reused: one RB-set corresponds to a channel in the unlicensed spectrum, or one RB-set corresponds to an LBT subband. If the configuration of the sidelink BWP or resource pool includes some RB-sets, when the terminal performs LBT in the resource pool, the LBT result will be inaccurate because only some RB-sets have sidelink transmissions. Therefore, similar to the configuration of the BWP in the NR-U system, the sidelink BWP configured in the SL-U system also needs to include an integer number of RB-sets, and the resource pool configured in the BWP also includes an integer number of RB-sets. The frequency domain starting position of the resource pool is the same as the frequency domain starting position of the first RB-set among the multiple RB-sets included in the resource pool, and the frequency domain ending position of the resource pool is the same as the frequency domain ending position of the last RB-set among the multiple RB-sets included in the resource pool. For example, as shown in FIG5 , three guard bands are configured in the sideline BWP, corresponding to guard band 0, guard band 1 and guard band 2, respectively, and these three guard bands separate four RB-sets. According to the frequency domain starting position of the sideline BWP (i.e., the starting point of the sideline BWP shown in the figure), the frequency domain starting position of each guard band (i.e., the starting point of the guard band shown in the figure) and the frequency domain size of the guard band (i.e., the length of the guard band shown in the figure), the frequency domain starting position and ending position of each RB-set can be determined. A sideline resource pool is configured in the sideline BWP, and the sideline resource pool includes three RB-sets, i.e., RB-set 0, RB-set 1 and RB-set 2. Therefore, the frequency domain starting position of the resource pool (i.e., the starting point of the resource pool shown in the figure) corresponds to the frequency domain starting position of resource block set 0, and the frequency domain ending position of the resource pool (i.e., the end point of the resource pool shown in the figure) corresponds to the frequency domain ending position of resource block set 2. 5. SL-U continuous uplink LBT failure detection and recovery mechanism Similar to the enhancements to NR-U, in order to support the normal operation of UE on unlicensed spectrum, enhanced considerations for continuous LBT failure are introduced in SL-U. The UE performs the judgment of continuous LBT failure and the recovery function of continuous LBT failure at the MAC layer. Specifically, the SL-U UE will be configured with the maximum number of LBT failure indications and the timer to determine whether to trigger continuous LBT failure. Each time the physical layer reports an LBT failure indication to the MAC layer, the MAC entity needs to reset and trigger the timer to start. When the number of consecutive LBT failure indications reported by the physical layer exceeds the configured maximum number, the MAC entity needs to trigger the LBT continuous failure process. On the other hand, if the MAC fails subsequently until the timer expires, If the physical layer does not receive the LBT failure indication reported by the physical layer, it is necessary to reset the counter and timer when the timer times out. The difference from NR-U is that the SL-U continuous uplink LBT failure detection mechanism of the MAC layer is for each RB-set (Per RB-set) (SL C-LBT failure is declared per RB-set), so the LBT failure indication given by the physical layer to the MAC layer is also per RB-set. The UE uses the MAC CE to report consistent LBT failure to the gNB. The MAC CE transmitted over the Uu interface indicates the RB set(s) where C-LBT failure happens. When the UE triggers SL-U continuous LBT failure in all RB sets, the UE triggers SL RLF for all unicast connections (UE triggers SL RLF for all UC connections when UE has triggered consistent SL LBT failure in all RB sets). For the recovery mechanism: When the MAC entity triggers a continuous LBT failure, since the Uu carrier is an authorized carrier, the terminal can immediately report to the network device through the Uu carrier that the continuous LBT failure has been triggered on a certain RB-set of the PC5 interface. In addition, the transmitting UE can send a frequency domain resource switching indication MAC CE to the receiving end, and the indication information can at least be applied to unicast and multicast services. Specifically, when the number of LBT failure indications reported by the physical layer received by the transmitting UE reaches the configured domain value, the sending of the frequency domain resource switching indication MAC CE can be triggered. In the frequency domain resource switching indication MAC CE, at least the reselected resource pool ID, channel ID, partial bandwidth ID or carrier ID can be considered to be carried. Considering that the UE is still in a state of continuous LBT failure at this time, the following two methods can be considered to allow the terminal to select resources for the frequency domain resource switching indication MAC CE: The network device can configure an abnormal resource pool on the licensed carrier for the UE, and the receiving UE needs to continuously monitor the abnormal resource pool, that is, the receiving UE needs to receive on both the unlicensed carrier and the licensed carrier. On the other hand, when the LBT failure of the transmitting UE causes the resource pool on the unlicensed carrier to be unavailable, a random resource selection can be performed in the abnormal resource pool to obtain a MAC CE for sending a frequency domain resource switching indication. The transmitting UE still needs to continue to perform LBT. When LBT is successful and the packet delay budget (PDB) corresponding to the frequency domain resource switching indication MAC CE has not timed out, the transmitting UE can send this MAC CE. On the contrary, if the PDB corresponding to this MAC CE times out and the transmitting UE is in a state of continuous LBT failure during this period, the transmitting UE discards this MAC CE. 6. Uu positioning Uu positioning can be understood as positioning achieved through the Uu interface. The communication architecture using Uu positioning includes one or more of UE, Next Generation Node B (gNB), Access and Mobility Management Function (AMF), and Location Management Function (LMF). Exemplarily, the positioning process is as follows: First, the UE and / or gNB sends a reference signal according to a known configuration pattern, and the reference signal includes, for example, a sounding reference signal (SRS) and / or a positioning reference signal (PRS). After that, the gNB and / or UE measures the reference signal according to the known configuration pattern to obtain the measurement quantities related to positioning, such as the departure angle, arrival angle, distance, and distance difference. Finally, these measurement quantities are aggregated to the UE or LMF to perform positioning and obtain the final positioning result. The reference signals sent by different UEs and gNBs should maintain orthogonality, so that it can be guaranteed that the signals measured by all parties in the system are fixed from a certain location. This guarantee is fundamental for positioning estimation. In addition, orthogonality can be maintained in one or more of the time domain, frequency domain, and code domain. As shown in FIG. 6 , a configuration and measurement process of SRS / PRS for positioning is shown, which includes one or more of the following steps: Step 0: The LMF exchanges NR Positioning Protocol A (NRPPa) DL PRS Configuration Information with the gNB / Transmission Reception Point (TRP) serving the UE and the neighboring gNB / TRP. Step 0 is optional. Step 1: The UE and LMF exchange LTE Positioning Protocol (LPP) capability information (LPP Capability Transfer). Step 1 is an optional step. Step 2: LMF sends an NRPPa Positioning Information Request to gNB / TRP. Step 3: gNB Determines UL SRS Resources Step 3a: Configure uplink SRS resources for the UE (UE SRS Configuration). Step 4: gNB / TRP sends NRPPa Positioning Information Response to LMF. Step 5a: LMF sends NRPPa Positioning Activation Request to gNB / TRP. It can also be understood that LMF and gNB / TRP activate UE to transmit SRS. Step 5b: gNB / TRP activates UE SRS transmission (Activate UE SRS Transmission). Step 5c: gNB / TRP sends NRPPa Positioning Activation Response to LMF. Step 6: LMF sends an NRPPa Measurement Request to the gNB / TRP serving the UE and the adjacent gNB / TRP. It can also be understood that LMF informs each adjacent gNB / TRP through NRPPa Measurement Request. The UE's SRS resource configuration requires each gNB / TRP to measure the SRS sent by the UE. Step 7: LMF sends LPP Provide Assistance Data to UE. It can also be understood that LMF sends the unique downlink PRS configuration information of each gNB / TRP to the UE. Step 8: LMF sends LPP Request Location Information to UE. It can also be understood that LMF activates UE to perform downlink measurement. Step 9a: The UE performs DL-PRS measurements (DL-PRS Measurements). Step 9b: gNB / TRP performs uplink SRS measurements (UL SRS Measurements). Step 10: UE sends LPP Provide Location Information to LMF. It can also be understood that UE sends the measurement result to LMF via LPP ProvideLocationInformation msg. Step 11: gNB / TRP sends NRPPa measurement response (NRPPa Measurement Response) to LMF. It can also be understood that each gNB / TRP reports the measurement results they collect to LMF. Step 12: LMF sends NRPPa POSITIONING DEACTIVATION to gNB / TRP. It can also be understood that LMF deactivates the information related to gNB / TRP positioning. 7. Downlink PRS Configuration The configuration information of DL PRS is provided to UE by LMF through LTE Positioning Protocol (LPP) signaling. The parameter configuration of DL PRS adopts a four-layer signaling structure, which is represented from the top layer to the bottom layer as follows: Positioning Frequency Layer (PFL), which has up to 4 layers; TRP: A positioning frequency layer can be configured with a maximum of 64 TRPs; DL PRS resource set: a TRP or a positioning frequency layer can be configured with up to 2 DL PRS resource sets; DL PRS resource: a DL PRS resource set, a TRP or a positioning frequency layer may be configured with up to 64 DL PRS resources. In each positioning frequency layer, the UE is configured with DL PRS signals sent by multiple TRPs at the same frequency point. Each TRP can be configured with one or two DL PRS resource sets, which configure all DL PRS resources sent by this TRP at a certain frequency point. Each DL PRS resource set can be configured with multiple DL PRS resources, each DL PRS resource can represent a transmit beam of a TRP and different DL PRS resources can represent different transmit beams of this TRP. A maximum of four DL PRS configurations for positioning frequency layers can be provided for a UE. The parameter structure of each positioning frequency layer provides one or more of the following PRS signal configuration parameters: The subcarrier spacing of the PRS signal. The cyclic prefix (CP) length of the PRS signal. PRS frequency domain resource bandwidth: This parameter is the number of physical resource blocks (PRBs) allocated to the PRS signal. The minimum PRS resource bandwidth is 24 PRBs, the granularity is 4 PRBs, and the maximum is 272 PRBs. · Frequency domain starting frequency position of PRS resource: This parameter defines the index of the starting PRB of the PRS signal in the frequency domain. The PRB index is defined relative to PointA of the PRS. The frequency domain reference point of the PRS signal (Point A). The comb size of the PRS signal (Comb-N). The above PRS parameters configured in each positioning frequency layer will be applied to all PRS resources contained in this positioning frequency layer PFL. That is to say, in a positioning frequency layer, all PRS signals from multiple different TRPs will use the same subcarrier spacing and CP length, the same comb size, be sent on the same frequency subband, and occupy exactly the same bandwidth. Such a design can support UE to simultaneously receive and measure PRS signals from multiple different TRPs sent on the same frequency point. The parameters of the TRP layer include an ID parameter for uniquely identifying the positioning TRP, the physical cell ID of the TRP, the NR Cell Global Identifier (NCGI) of the TRP, and the Absolute Radio-Frequency Channel Number (ARFCN) of the TRP. Up to two DL PRS resource sets can be configured in each TRP layer. The DL PRS resource set layer is configured with one or more of the following parameters, which are applied to all DL PRS resources contained in this resource set. DL PRS resource set identification ID (nr-DL-PRS-ResourceSetID). ·DL PRS transmission period and time slot offset (dl-PRS-Periodicity-and-ResourceSetSlotOffset). This parameter defines the time domain transmission behavior of all DL PRS resources contained in this DL PRS resource set. The minimum value of the configurable DL PRS transmission period is 4 milliseconds, and the maximum value is 10240 milliseconds. The configuration of DL PRS supports flexible subcarrier spacing, such as subcarrier spacing of 15KHz, 30KHz, 60KHz or 120KHz. Under different subcarrier spacing conditions, the range of configurable DL PRS transmission period values ​​is the same. DL PRS resource repetition factor (dl-PRS-ResourceRepetitionFactor): This parameter defines the number of repetitions of a PRS resource in each PRS period. The repetition of the same DL PRS resource can be used by the UE to aggregate the energy of the DL PRS signal transmitted multiple times to increase the coverage distance of the DL PRS and increase the positioning accuracy. In the system, the repeated transmission of DL PRS resources can be used by the UE to perform receive beam scanning operations. The UE can use different receive beams to receive the repeated transmission of the same DL PRS resource to find the best match between the TRP transmit beam and the UE receive beam. On the other hand, the repeated transmission of DL PRS resources will increase the PRS overhead. Generally speaking, the repetition factor of DL PRS resources is 1, 2, 4, 6, 8, 16 or 32. DL-PRS-ResourceTimeGap: This parameter defines the number of time slots between two consecutive repetitions of the same PRS resource. · DL PRS muting configuration: This parameter is used to define that the DL PRS signal is not sent on certain allocated time-frequency resources (called Muting). Muting means that the DL PRS signal is not sent on all allocated time-frequency resources, but is intentionally not sent on certain designated time-frequency resources. The purpose of doing so is, on the one hand, to avoid conflicts with other signals such as SSB, and on the other hand, to avoid interference between signals sent by different TRPs. For example, intentionally turning off the DL PRS transmission of a certain TRP at certain times allows the UE to receive the DL PRS signal from a farther TRP. The number of OFDM symbols occupied by a DL PRS resource (dl-PRS-NumSymbols): This parameter defines the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols allocated to a DL PRS resource within a time slot. As mentioned above, all parameters configured in a DL PRS resource set configuration layer will be applied to all DL PRS resources contained in this resource set. Therefore, all DL PRS resources in the same DL PRS resource set will be sent with the same period, the same number of repetitions, and occupy the same number of OFDM symbols. Each DL PRS resource is configured with one or more of the following parameters: A DL PRS resource identification ID (nr-DL-PRS-ResourceID). ·DL PRS sequence ID (dl-PRS-SequenceID). ·DL PRS starting frequency domain resource unit offset (dl-PRS-CombSizeN-AndReOffset): This parameter defines the frequency domain resource unit offset used for resource mapping on the first allocated OFDM symbol of the DL PRS resource in a time slot. Based on this parameter and the relative offset value specified in TS38.211, the UE can determine the frequency domain resource unit offset used for resource mapping on each OFDM symbol. DL PRS resource slot offset (dl-PRS-ResourceSlotOffset): This parameter defines the slot offset relative to the DL PRS resource set. This parameter can determine the time slot position of each DL PRS resource. DL PRS OFDM symbol offset (dl-PRS-ResourceSymbolOffset): This parameter defines the time-frequency resource allocation position of a DL PRS resource in a time slot. It indicates the starting OFDM symbol index in a time slot. DL PRS QCL information (dl-PRS-QCL-Info): This parameter provides the quasi co-location information (Quasi Co-Location, QCL) of the DL PRS signal. So how do you distinguish different DL PRS resources in a DL PRS resource set? Each DL PRS resource is configured with one or more of the following parameters: A DL PRS resource identification ID (nr-DL-PRS-ResourceID). ·DL PRS sequence ID (dl-PRS-SequenceID). ·DL PRS starting frequency domain resource unit offset (dl-PRS-CombSizeN-AndReOffset): This parameter defines the frequency domain resource unit offset used for resource mapping on the first allocated OFDM symbol of the DL PRS resource in a time slot. Based on this parameter and the relative offset value specified in TS38.211, the UE can determine the frequency domain resource unit offset used for resource mapping on each OFDM symbol. DL PRS resource slot offset (dl-PRS-ResourceSlotOffset): This parameter defines the slot offset relative to the DL PRS resource set. This parameter can determine the time slot position of each DL PRS resource. DL PRS OFDM symbol offset (dl-PRS-ResourceSymbolOffset): This parameter defines the time-frequency resource allocation position of a DL PRS resource in a time slot. It indicates the starting OFDM symbol index in a time slot. DL PRS QCL information (dl-PRS-QCL-Info): This parameter provides the QCL information of the DL PRS signal. 8. Positioning SRS Configuration The configuration information of the positioning SRS signal is provided to the UE by the gNB of the serving cell through RRC signaling. The system configures the positioning SRS signal in the same way as the Multi Input Multi Output (MIMO) SRS signal. A UE can be configured with one or more positioning SRS signal resource sets. And a positioning SRS signal resource set can contain one or more positioning SRS signal resources. Compared with the MIMO SRS signal, the biggest difference between the positioning SRS signal and the MIMO SRS signal is that the positioning SRS signal needs to be sent to the TRP of the non-serving cell so that multiple TRPs can measure the uplink positioning measurement value of the same UE and calculate the position of the UE. In terms of time domain transmission, the positioning SRS signal inherits all time domain transmission behaviors supported by the MIMO SRS signal. In other words, the positioning SRS signal supports periodic transmission, semi-continuous transmission, and aperiodic transmission. Semi-continuous transmission is activated or deactivated by MAC CE. The aperiodic positioning SRS signal is triggered by downlink control information (DCI). These are the same as the existing transmission mechanism of the SRS signal for MIMO. The above content can be found in English as follows: The IE SRS-Config is used to configure sounding reference signal transmissions.The configuration defines a list of SRS-Resources,a list of SRS-PosResources,a list of SRS-PosResourceSets and a list of SRS-ResourceSets.Each resource set defines a set of SRS-Resources or SRS-PosResources.The network triggers the transmission of the set of SRS-Resources or SRS-PosResources using a configured aperiodicSRS-ResourceTrigger(L1 DCI).The network does not configure SRS specific power control parameters,alpha(without suffix),p0(without suffix)or pathlossReferenceRS if unifiedTCI-StateType is configured for the serving cell. SRS-Config information element 9. SL Positioning In the Out-of-Coverage (OOC) scenario of SL positioning, the anchor UE (Anchor UE) and the positioning target UE (Target UE), which play a role similar to that of gNB (TRP), are both disconnected from the network equipment. In this case, their reference signals (such as SL-PRS) are not controlled by LMF or gNB. In the OOC scenario, the target UE needs to discover and select a UE as a SL positioning service UE (Server UE), and perform measurements on the SL-PRS sent by the positioning target UE through the anchor UE, or the target UE performs measurements on the SL-PRS sent by the anchor UE. The location information of the anchor UE, and / or the measurement results of the target UE, and / or the measurement results of the anchor UE are transmitted to the SL positioning service UE. The SL positioning service UE summarizes and calculates the results to achieve positioning. In the in-Coverage (IC) scenario of SL positioning, both the anchor UE and the positioning target UE are connected to the network device. In this case, the configuration of SL-PRS can be controlled by LMF and / or gNB. The anchor UE performs measurements on the SL-PRS sent by the positioning target UE, or the target UE performs measurements on the SL-PRS sent by the anchor UE. The location information of the anchor UE, and / or the measurement results of the target UE, and / or the measurement results of the anchor UE can be transmitted to the LMF, and the LMF will summarize and calculate the results to achieve positioning. The target UE can also complete the position calculation based on its own SL-PRS measurement results. In this case, the LMF is required to provide the target UE with positioning assistance information, such as the location information of the anchor UE. In the partial coverage (PC) scenario of SL positioning, at least one of the anchor UE and the target UE is within the coverage of the network device, and at least one is outside the coverage of the network device. The SL positioning process in this case can refer to the positioning process in the IC scenario, and positioning can be achieved through LMF; it can also refer to the positioning process in the OOC scenario, and positioning can be achieved by the SL positioning service UE. The target UE refers to the UE whose distance, direction and / or position is measured with the support of one or more anchor UEs of the SL in a ranging / SL positioning-based service. Anchor UE refers to a UE that supports the positioning of the target UE. For example, by using SL to send and / or receive reference signals for SL positioning, provide positioning related information, etc. In some embodiments, the anchor UE is also called SL Reference UE. In some embodiments, the anchor UE whose position is known or can obtain its own position using Uu positioning is also called Located UE. SL positioning service UE: A UE with auxiliary data distribution and / or position calculation functions determined based on ranging / SL positioning service requests. In some embodiments, the SL positioning service UE interacts with the target UE, anchor UE, or other UEs other than the anchor UE and the target UE through PC5 when necessary to determine the ranging / SL positioning method, distribute auxiliary data, and calculate the position of the target UE. In some embodiments, the SL positioning service UE can be at least one of the following UEs: target UE; anchor UE; other UEs other than the anchor UE and the target UE. 10. Sensing Figure 7 shows a schematic diagram of a network architecture, wherein the UE is connected to the access network (AN) via the Uu port at the access layer, exchanging access layer messages and wireless data transmission, and the UE is connected to the access and mobility management function (AMF) via the N1 port at the non-access layer (NAS), exchanging NAS messages. SMF is the session management function in the core network. In addition to managing the mobility of the UE, AMF is also responsible for forwarding session management related messages between the UE and SMF. PCF is the policy control function in the core network, responsible for formulating policies related to UE mobility management, session management, and billing. UPF is the user plane function in the core network, which transmits data with the external data network (DN) through the N6 interface and with the AN through the N3 interface. Radio electromagnetic wave signals can not only be used for wireless data transmission and communication purposes, but also have environmental perception capabilities, such as user action or gesture recognition, breathing monitoring, terminal movement speed measurement, environmental imaging, weather monitoring, etc. Therefore, the communication system can be used not only for communication and data transmission, but also for the acquisition of perception information. Table 1 below lists some perception information at different levels. Table 1 Perception information Infinite perception refers to the perception capability focusing on wireless signal perception in the integration of communication perception, that is, by analyzing the direct, reflected, and scattered signals of radio waves, the information of the environment and / or the target objects in the environment (such as attributes and status, etc.) is perceived, and the functions of positioning, ranging, speed measurement, imaging, detection, identification, and environmental reconstruction are completed to realize the perception and exploration of the physical world. This includes passive perception and active perception. Passive perception: The sensing node (network side or UE) senses by acquiring electromagnetic waves (such as terahertz waves) emitted by the target object or reflecting electromagnetic waves from outside the sensing node and the target object, such as China's passive imaging sensing technology in radio astronomy. Active sensing: The sensing sending node (network side or UE) sends electromagnetic waves, which are reflected by the target object, and the sensing receiving node receives the echo for sensing, such as the active radar sensing technology that transmits the detection signal. The node that receives the reflected wave is not necessarily the node that sends the detection signal, that is, multiple nodes of the sensing party can achieve active sensing through some form of joint processing. The sensing function can be supported in the wireless communication network through the sensing control network element (Sensing Function) and the corresponding process. The application entity sends the sensing request for the sensing target to the core network. The core network selects the correct access network device or auxiliary UE (collectively referred to as the sensing node) through the sensing control network element or AMF, and triggers the ability to perform sensing-related wireless measurements, starts the measurement of sensing information and generates sensing results. As shown in Figure 8, the main wireless sensing modes of synaesthesia integration include one or more of the following: a) Base station echo sensing (gNB autonomous sensing): The base station sends a sensing signal and receives an echo signal; b) Inter-base station sensing (gNB-2-gNB sensing): Base station B receives the sensing signal sent by base station A; c) Air interface uplink perception (UE-2-gNB perception): The base station receives the perception signal sent by the terminal; d) Air interface downlink perception (gNB-2-UE perception): The terminal receives the perception signal sent by the base station; e) Terminal echo perception (UE spontaneous transmission and reception perception): The terminal sends a perception signal and receives an echo signal; f) Inter-terminal perception (UE-2-UE perception): Terminal B receives the perception signal sent by terminal A. Whether it is a signal used for positioning or a signal used for perception, generally speaking, the larger the equivalent bandwidth occupied by the transmission, the higher the resolution or accuracy of the positioning and perception results. Therefore, if the accuracy requirements of the positioning service or the perception service are relatively high, a larger bandwidth is required to send the reference signals mentioned above, such as DL-PRS, positioning SRS, SL-PRS, perception signals, etc. However, spectrum resources in licensed frequency bands are very scarce and tight, and usually give priority to communication services, but cannot provide sufficient bandwidth for positioning or perception. Therefore, it is possible to consider using frequency offset resources in unlicensed frequency bands to meet positioning or perception needs. However, when the reference signal is sent in an unlicensed frequency band, LBT needs to be performed, just like the communication in the unlicensed frequency band. Then, the problem of LBT failure or even continuous LBT failure is inevitably faced. Furthermore, the bandwidth of the reference signal used for positioning or sensing services is usually larger or even much larger than the bandwidth required by the communication signal due to the accuracy requirements of the service, resulting in a more serious continuous LBT failure problem than the communication signal. As mentioned above, each transmission or LBT failure detection on the unlicensed frequency band is performed with RB-set (i.e., 20MHz) as the bandwidth granularity. Therefore, when the reference signal used for positioning or sensing services is sent on the unlicensed frequency band, it will encounter more frequent continuous LBT failures due to the large bandwidth, resulting in a more serious and obvious continuous LBT failure problem. Therefore, if one wants to transmit a signal with a larger bandwidth in a shared frequency band, such as a reference signal for positioning or sensing services, the more serious LBT failure problem faced by signal transmission needs to be solved urgently. Based on the above problems, the present application provides a signal transmission method, which helps to provide a feasible signal transmission solution for the UE when LBT fails in the shared frequency band. Fig. 9 shows a schematic diagram of a wireless communication system provided by an exemplary embodiment of the present application. The wireless communication system includes a network device 110 and a terminal device 120, and / or a terminal device 120 and a terminal device 130, which is not limited in the present application. The network device 110 in the present application provides a wireless communication function, and the network device 110 includes but is not limited to: Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved Node B, or Home Node B, HNB), Baseband Unit (BBU), Wireless Fidelity (Wi-Fi) The access point (AP), wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP) in the system can also be the next generation node B (gNB) or transmission point (TRP or TP) in the fifth generation (5G) mobile communication system, or one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), or a base station in a Beyond Fifth Generation (B5G) mobile communication system or a sixth generation (6G) mobile communication system, or a core network (CN), fronthaul, backhaul, radio access network (RAN), network slicing, or a reader / writer of a radio frequency identification (RFID) system. The terminal device 120 and / or terminal device 130 in the present application are also called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, and user device. The terminal includes but is not limited to: handheld devices, wearable devices, vehicle-mounted devices and Internet of Things devices, such as: electronic tags, controllers, mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, mobile Internet devices (Mobile Internet Device, MID), augmented reality (Augmented Reality, AR) terminals, virtual reality (Virtual Reality, VR) terminals and mixed reality (Mixed Reality, MR) terminals, wearable devices, handles, wireless terminals in industrial control (Industrial Control), wireless terminals in self-driving (Self Driving), wireless terminals in remote medical care (Remote Medical), wireless terminals in smart grid (Smart Grid), wireless terminals in transportation safety (Transportation Safety), wireless terminals in smart cities (Smart City), wireless terminals in smart homes (Smart Home), wireless terminals in remote medical surgery (Remote Medical Surgery), cellular phones, cordless phones, Session Initiation Protocol (Session Initiation Protocol, SIP) phones, Wireless Local Loop (Wireless Local Loop (WLL) stations, personal digital assistants (PDA), TV set top boxes (STB), customer premises equipment (CPE), etc. The network device 110 and the terminal device 120 communicate with each other via some air interface technology, such as a Uu interface. Exemplarily, there are two communication scenarios between the network device 110 and the terminal device 120: an uplink communication scenario and a downlink communication scenario. Uplink communication refers to sending signals to the network device 110; downlink communication refers to sending signals to the terminal device 120. The terminal device 120 and the terminal device 130 communicate with each other via some direct communication interface, such as a PC5 interface. In some embodiments, there are two communication scenarios between the terminal device 120 and the terminal device 130: a first side communication scenario and a second side communication scenario. The first side communication refers to sending a signal to the terminal device 130; the second side communication refers to sending a signal to the terminal device 120. Terminal device 120 and terminal device 130 are both within the network coverage and located in the same cell, or terminal device 120 and terminal device 130 are both within the network coverage but located in different cells, or terminal device 120 is within the network coverage but terminal device 130 is outside the network coverage. The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5G mobile communication system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, terrestrial communication network (Terrestrial Networks, TN) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, Wi-Fi), cellular Internet of Things system, cellular passive Internet of Things system, can also be applied to the subsequent evolution system of 5G NR system, and can also be applied to B5G, 6G and subsequent evolution systems. In some embodiments of the present application, "NR" may also be referred to as 5G NR system or 5G system. Among them, the 5G mobile communication system may include non-standalone networking (Non-Standalone, NSA) and / or standalone networking (Standalone, SA). The technical solutions provided in the embodiments of the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device to device (D2D) network, machine to machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, IoT network can include vehicle networking, for example. Among them, the communication mode in the vehicle networking system is collectively referred to as vehicle to other devices (Vehicle to X, V2X, X can represent anything), for example, the V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc. The wireless communication system provided in this embodiment can be applied to at least one of the following communication scenarios, but is not limited to: uplink communication scenario, downlink communication scenario Line communication scenario and side line communication scenario. FIG. 10 shows the network coverage of the terminal device 120 and the terminal device 130 shown in FIG. 9 . As shown in Fig. 10(a), the terminal device 120 and the terminal device 130 are within the coverage of the same network device 110, which is the IC scenario described above. In this case, the communication between the terminal device 120 and the terminal device 130 can also be called SL communication within the network coverage. Optionally, the terminal device 120 and the terminal device 130 receive configuration signaling from the network device 110, and the configuration signaling received by the terminal device 120 and the terminal device 130 are the same or different. The terminal device 120 and the terminal device 130 respectively perform one or more of uplink communication, downlink communication, and side communication based on the configuration signaling. As shown in Figure 10(b), the terminal device 120 is within the network coverage, while the terminal device 130 is outside the network coverage. This situation is the PC scenario mentioned above. In this case, the communication between the terminal devices 120 and 130 can also be called partial network coverage SL communication. As shown in Fig. 10(c), both the terminal device 120 and the terminal device 130 are outside the network coverage, which is the OOC scenario mentioned above. In this case, the communication between the terminal device 120 and the terminal device 130 can also be called SL communication outside the network coverage. FIG11 is a schematic flow chart of a signal transmission method provided by an exemplary embodiment of the present application. The method is performed by a first UE. The first UE may be implemented as a terminal device as shown in FIG9 or FIG10. The method includes at least some of the following steps: Step 320: When an LBT failure occurs in the first shared frequency domain resource, the first signal is not sent, or the first signal is sent in the second shared frequency domain resource. The first shared frequency domain resource includes the shared frequency domain resource that the first signal needs to occupy. It can also be understood that the first shared frequency domain resource is the shared frequency domain resource that the first UE performs LBT on before sending the first signal. It can also be understood that the first shared frequency domain resource is the shared frequency domain resource that the first UE expects to use to transmit the first signal. The second shared frequency domain resource is a shared frequency domain resource in which LBT succeeds in the first shared frequency domain resource. It can also be understood that the second shared frequency domain resource belongs to the first shared frequency domain resource, and the second shared frequency domain resource does not fail in LBT. In the embodiment of the present application, the shared frequency domain resources refer to the frequency domain resources in the shared spectrum. The shared spectrum is also called a shared frequency band, or an unlicensed spectrum, or an unlicensed frequency band. In the embodiment of the present application, LBT can be understood as channel monitoring. LBT failure can be understood as the channel monitoring result being a busy channel or a channel unavailable channel. LBT success, i.e., no LBT failure occurs, can be understood as the channel monitoring result being a idle channel or a channel available channel. The sender of the first signal is the first UE, and the receiver of the first signal is a network device or other UE. The other UE includes UEs other than the first UE. That is, in the embodiment of the present application, the first UE can perform uplink transmission and / or sidelink transmission of the first signal. In some embodiments, the first signal includes a signal used for a communication service. For example, the first signal carries one or more of data information, control information, and system information. In some embodiments, the first signal includes a signal for non-communication services, such as at least one of positioning services, sensing services, etc. The first signal includes one or more of reference signals, auxiliary signals, synchronization signals, and data information. In some embodiments, the first signal includes a signal for communication traffic and a signal for non-communication traffic. To summarize, the method provided in the embodiment of the present application supports the first UE to not send the first signal when LBT fails in the shared frequency domain resources, or to send the first signal in the shared frequency domain resources where LBT succeeds, thereby providing a feasible signal transmission solution for the situation where LBT occurs in the shared frequency domain resources, and providing quality, latency and efficiency guarantees for communication services and non-communication services on the shared spectrum. In some embodiments, step 320 may be implemented as step 440a or 440b. Optionally, in addition to step 440a or 440b, the signal transmission method may further include one or more of step 410, step 420, and step 430, as shown in FIG12. FIG12 shows a flow chart of a signal transmission method provided by an exemplary embodiment of the present application, the method is performed by the first UE shown in FIG11, and the method includes at least some of the following steps: Step 410: Send first capability information, where the first capability information is used to indicate whether the first UE supports sending a first signal in discontinuous and / or incomplete shared frequency domain resources. In some embodiments, the first capability information is used to indicate that: the first UE supports sending the first signal in discontinuous shared frequency domain resources, and / or the first UE supports sending the first signal in incomplete shared frequency domain resources. In some embodiments, the first capability information is used to indicate that: the first UE supports sending the first signal in discontinuous shared frequency domain resources, and / or the first UE does not support sending the first signal in incomplete shared frequency domain resources. In some embodiments, the first capability information is used to indicate that: the first UE does not support sending the first signal in discontinuous shared frequency domain resources, and / or the first UE supports sending the first signal in incomplete shared frequency domain resources. In some embodiments, the first capability information is used to indicate that: the first UE does not support sending the first signal in discontinuous shared frequency domain resources, and / or the first UE does not support sending the first signal in incomplete shared frequency domain resources. In some embodiments, the first capability information is further used to indicate shared frequency domain resources supported or desired by the first UE. In some embodiments, the first capability information includes at least one of the following information: ·A maximum number of segments of the second shared frequency domain resource supported by the first UE; ·a minimum bandwidth of the second shared frequency domain resource supported by the first UE; The minimum number of second shared frequency domain resources supported by the first UE; a minimum value of the first ratio supported by the first UE, where the first ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the first shared frequency domain resource; a minimum value of a second ratio supported by the first UE, where the second ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the shared frequency domain resource where the LBT failure occurs; The maximum number of segments of the second shared frequency domain resource expected by the first UE; A minimum bandwidth of the second shared frequency domain resource expected by the first UE; a minimum number of the second shared frequency domain resources desired by the first UE; A minimum value of the first ratio expected by the first UE; The minimum value of the second ratio expected by the first UE. The second shared frequency domain resource is a shared frequency domain resource in which LBT succeeds in the first shared frequency domain resource. The first shared frequency domain resource includes a shared frequency domain resource that needs to be occupied by the first signal. In some embodiments, the first capability information can indicate, through limitations in at least one of the aspects such as the number of segments, bandwidth, quantity, ratio, etc., that when an LBT failure occurs on the first shared frequency domain resource, the first UE supports or expects to send the first signal on what kind of shared frequency domain resource with successful LBT. In some embodiments, the first capability information is used to indicate whether the first UE supports sending the first signal in the shared frequency domain resources where LBT succeeds when LBT fails on the first shared frequency domain resource, and / or whether the first UE supports sending the first signal in discontinuous shared frequency domain resources, and / or the first UE supports a second shared frequency domain resource for sending the first signal, and / or the first UE expects to send the first signal on a second shared frequency domain resource. In some embodiments, the first capability information is frequency band level capability information, or the first capability information is UE level capability information. It can also be understood that the first capability information is for each frequency band (Per-Frequency Band), or the first capability information is for each first UE (Per-UE). The shared frequency domain resources in this application include: the shared frequency domain resources of the NR system (that is, the frequency domain resources of the NR-U band), and / or, the shared frequency domain resources of the SL (that is, the frequency domain resources of the SL-U band). Step 420: Receive first configuration information, where the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource. Among them, this parameter is related to the transmission behavior of the first UE when LBT fails in the first shared frequency domain resource. In some embodiments, the first configuration information is used to indicate at least one of the following: The first UE is not allowed to send an incomplete first signal; Allowing the first UE to send an incomplete first signal; Not allowing the first UE to send the first signal on discontinuous shared frequency domain resources; Allowing the first UE to send a first signal on discontinuous shared frequency domain resources; Allowing the first UE to send an incomplete first signal on continuous shared frequency domain resources; Allowing the first UE to send an incomplete first signal on discontinuous shared frequency domain resources; The first UE is not allowed to send the first signal on the incomplete shared frequency domain resources; Allowing the first UE to send a first signal on an incomplete shared frequency domain resource; Allowing the first UE to send an incomplete first signal on a complete shared frequency domain resource; Allowing the first UE to send an incomplete first signal on an incomplete shared frequency domain resource. The incomplete first signal refers to a first signal sent in an incomplete shared frequency domain resource. The design of the first configuration information enables the network device to configure different first signal sending behaviors for first UEs with different capabilities when encountering LBT failure on one or more RB-sets based on the capabilities of the first UE. A first UE with better capabilities can still send the first signal on time even if it encounters LBT failure on one or more RB-sets, so as to ensure the transmission delay of the first signal and the delay when using the first signal to meet communication requirements, and / or positioning requirements, and / or perception requirements. In some embodiments, the shared frequency domain resources include a BWP, the BWP includes x RB-sets, and the incomplete shared frequency domain resources refer to a portion of RBs in the BWP. Optionally, this portion of RBs forms an integer number of RB-sets, or forms a non-integer number of RB-sets. Optionally, the BWP may also include a number of guard bands, and the guard bands are located between RB-sets. Optionally, this portion of RBs is continuous or discontinuous. x is an integer greater than or equal to 1. In some embodiments, the shared frequency domain resources include a side BWP, which includes x RB-sets, and the incomplete shared frequency domain resources refer to a portion of RBs in the side BWP. Optionally, this portion of RBs forms an integer number of RB-sets, or forms a non-integer number of RB-sets. Optionally, the side BWP may also include a number of guard bands, which are located between RB-sets. Optionally, this portion of RBs is continuous or discontinuous. x is an integer greater than or equal to 1. In some embodiments, the shared frequency domain resource includes a resource pool, the resource pool includes x RB-sets, and the incomplete shared frequency domain resource refers to A portion of RBs in the resource pool. Optionally, this portion of RBs forms an integer number of RB-sets, or forms a non-integer number of RB-sets. Optionally, the resource pool may also include a plurality of guard bands, and the guard bands are located between RB-sets. Optionally, this portion of RBs is continuous or discontinuous. x is an integer greater than or equal to 1. In some embodiments, if a portion of the RBs included in the incomplete shared frequency domain resources are continuous, it indicates that there are no RBs with LBT failure and protection bands between the portion of RBs. Conversely, if the portion of RBs is discontinuous, it indicates that there are RBs with LBT failure and / or protection bands between the portion of RBs. In some embodiments, if a portion of RBs included in the incomplete shared frequency domain resource is continuous, it indicates that there are no RBs with LBT failures between the portion of RBs. Conversely, if the portion of RBs is discontinuous, it indicates that there are RBs with LBT failures between the portion of RBs. In some embodiments, the first configuration information is used to instruct the first UE to send a first signal in the second shared frequency domain resources. In some embodiments, the first configuration information is used to instruct the first UE to send a first signal on a second shared frequency domain resource when a first condition is met. The first condition is related to one or more of business requirements, resource requirements of the first signal, and accuracy requirements of the first signal. In some embodiments, the first condition includes at least one of the following: The first ratio is greater than a first threshold, and the first ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the first shared frequency domain resource; The second ratio is greater than the second threshold, and the second ratio is a ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the shared frequency domain resource where the LBT failure occurs; The number of the second shared frequency domain resources is greater than a third threshold; The bandwidth of the second shared frequency domain resource is greater than a fourth threshold; The maximum number of segments of the second shared frequency domain resource is greater than a fifth threshold. In some embodiments, the first threshold is determined by the network device, or by a core network element, or by a communication protocol agreement, or by negotiation between the network device and the first UE, or by negotiation between the network device and the second UE. The determination of the second threshold, the third threshold, the fourth threshold, and the fifth threshold is similar to that of the first threshold, and will not be repeated herein. In some embodiments, the first shared frequency domain resources include one or more of BWP, resource pool, side BWP, LBT, channel, RB-set, and RB, and the second shared frequency domain resources include one or more of BWP, resource pool, side BWP, LBT, channel, RB-set, and RB. The number of the second shared frequency domain resources refers to the number of BWPs included in the second shared frequency domain resources, and / or the number of resource pools, and / or the number of side BWPs, and / or the number of LBTs, and / or the number of channels, and / or the number of RB-sets, and / or the number of RBs. The first condition is designed so that when the bandwidth / number available for sending the first signal is lower than the threshold, the first UE does not send the first signal to save overhead. The threshold is set to limit the sending of the first signal for the following two reasons: 1. In some cases, when the first signal is used to implement the positioning service and / or the perception service, if the bandwidth / number of the first signal is lower than the threshold, even if the first signal is sent, the accuracy and resolution requirements of the positioning service and / or the perception service cannot be met. In other words, when the first condition is not met, the sending of the first signal will result in a meaningless waste of resources. 2. In some cases, when the first signal is used to implement positioning services and / or perception services, if the bandwidth / number of the first signal is lower than the threshold, and / or the bandwidth occupied by the first signal is discontinuous, and / or the bandwidth occupied by the first signal is incomplete, the receiver of the first signal will not be able to accurately measure the first signal, which will have a negative impact on the measurement accuracy and measurement results of the first signal. In other words, when the first condition is not met, the transmission of the first signal is not conducive to the results of the positioning service and / or perception service. In some embodiments, the first configuration information includes at least one of the following parameters: ·Time domain resources of the first signal; Frequency domain resources of the first signal; The resource type of the first signal; The comb size of the first signal (Comb-Number, Comb-N); A sequence identifier (Identity, ID) of the first signal; A power control parameter of the first signal (Power Control Parameter); Spatial relationship information of the first signal. The resource type of the first signal includes one or more of a periodic resource type, a non-periodic resource type, and a semi-persistent resource type. The Comb-N of the first signal includes one or more of Comb-2, Comb-3, Comb-4, Comb-6, Comb-12, etc. Optionally, the first configuration information also includes a comb type (Comb-Type) of the first signal. The power control parameter of the first signal includes an open-loop power control parameter and / or a closed-loop power control parameter. In some embodiments, the first configuration information may be configured with reference to the relevant contents in the previous texts “7. Configuration of downlink PRS”, “8. Configuration of positioning SRS”, and “9. SL positioning”, which will not be repeated here. Step 430: Receive second capability information, where the second capability information is used to indicate whether the second UE supports receiving and / or measuring the first signal on discontinuous and / or incomplete shared frequency domain resources. In some embodiments, the second capability information is used to indicate at least one of the following: Whether the second UE supports receiving the first signal in discontinuous shared frequency domain resources; Whether the second UE supports measuring the first signal in discontinuous shared frequency domain resources; Whether the second UE supports receiving the first signal in an incomplete shared frequency domain resource; Whether the second UE supports measuring the first signal on an incomplete shared frequency domain resource. In some embodiments, the second capability information is used to indicate at least one of the following: The second UE supports receiving an incomplete first signal; The second UE does not support receiving the incomplete first signal; The second UE supports measuring the incomplete first signal; The second UE does not support measuring the incomplete first signal; The second UE supports receiving the first signal in an incomplete shared frequency domain resource; The second UE does not support receiving the first signal in the incomplete shared frequency domain resources; The second UE supports measuring the first signal in an incomplete shared frequency domain resource; The second UE does not support measuring the first signal on the incomplete shared frequency domain resources; The second UE supports receiving the first signal in discontinuous shared frequency domain resources; The second UE does not support receiving the first signal in discontinuous shared frequency domain resources; The second UE supports measuring the first signal in discontinuous shared frequency domain resources; The second UE does not support measuring the first signal in discontinuous shared frequency domain resources. In some embodiments, the second capability information is further used to indicate the shared frequency domain resources supported or desired by the second UE. In some embodiments, the second capability information includes at least one of the following information: ·A maximum number of segments of the second shared frequency domain resource supported by the second UE; ·a minimum bandwidth of the second shared frequency domain resource supported by the second UE; The minimum number of second shared frequency domain resources supported by the second UE; a minimum value of the first ratio supported by the second UE, where the first ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the first shared frequency domain resource; a minimum value of the second ratio supported by the second UE, where the second ratio is the minimum ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the shared frequency domain resource where the LBT failure occurs; The maximum number of segments of the second shared frequency domain resource desired by the second UE; A minimum bandwidth of the second shared frequency domain resource expected by the second UE; The minimum number of second shared frequency domain resources expected by the second UE; A minimum value of the first ratio expected by the second UE; • A minimum value of the second ratio expected by the second UE. The second shared frequency domain resource is a shared frequency domain resource in which LBT succeeds in the first shared frequency domain resource. The second shared frequency domain resource includes the shared frequency domain resource that the first signal needs to occupy. In some embodiments, the second capability information can indicate, through limitations in at least one of the number of segments, bandwidth, quantity, ratio, etc., that when an LBT failure occurs on the first shared frequency domain resource, the second UE supports or expects to receive and / or measure the first signal on what kind of shared frequency domain resource with successful LBT. In some embodiments, the second capability information is used to indicate whether the second UE supports receiving the first signal in the shared frequency domain resources where LBT succeeds when LBT fails on the first shared frequency domain resource, and / or whether the second UE supports receiving the first signal in discontinuous shared frequency domain resources, and / or the second UE supports receiving the second shared frequency domain resources for the first signal, and / or the second UE expects to receive the second shared frequency domain resources for the first signal, whether the second UE supports measuring the first signal in the shared frequency domain resources where LBT succeeds, and / or whether the second UE supports measuring the first signal in discontinuous shared frequency domain resources, and / or the second UE supports measuring the first signal in the second shared frequency domain resources, and / or the second UE expects to measure the first signal on the second shared frequency domain resources. In some embodiments, the second capability information is frequency band level capability information, or the second capability information is UE level capability information. It can also be understood that the second capability information is for each frequency band (Per-Frequency Band), or the second capability information is for each second UE (Per-UE). Step 440a: Based on the first information, when an LBT failure occurs in the first shared frequency domain resource, the first signal is not sent. The first information is related to shared spectrum channel access (Shared Spectrum Channel Access), that is, the first information is related to unlicensed frequency band access. In some embodiments, the first information includes at least one of first capability information, first configuration information, and second capability information. In some embodiments, based on the parameters of the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, the first UE does not send the first signal. In some embodiments, based on the first capability information, when an LBT failure occurs in the first shared frequency domain resource, the first UE does not send the first signal. In some embodiments, the first capability information indicates that the first UE does not support sending the first signal on discontinuous and / or incomplete shared frequency domain resources, and when an LBT failure occurs in the first shared frequency domain resources, the first UE does not send the first signal. In some embodiments, based on the second capability information, when an LBT failure occurs in the first shared frequency domain resource, the first UE does not send the first signal. In some embodiments, the second capability information indicates that the second UE does not support receiving the first signal on discontinuous and / or incomplete shared frequency domain resources, and the first UE does not send the first signal when LBT failure occurs in the first shared frequency domain resources. In some embodiments, the second capability information indicates that the second UE does not support measuring the first signal on discontinuous and / or incomplete shared frequency domain resources, and the first UE does not send the first signal when LBT failure occurs in the first shared frequency domain resources. In some embodiments, based on the first capability information and the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, the first UE does not send the first signal. In some embodiments, the first capability information indicates that the first UE does not support sending the first signal on discontinuous and / or incomplete shared frequency domain resources, and the first configuration information indicates that the first UE does not send the first signal. In the event of an LBT failure in the first shared frequency domain resource, the first UE does not send the first signal. In some embodiments, based on the first capability information and the second capability information, when an LBT failure occurs in the first shared frequency domain resource, the first UE does not send the first signal. In some embodiments, the first capability information indicates that the first UE does not support sending the first signal on discontinuous and / or incomplete shared frequency domain resources, and the second capability information indicates that the second UE does not support receiving the first signal on discontinuous and / or incomplete shared frequency domain resources. In the event of an LBT failure in the first shared frequency domain resource, the first UE does not send the first signal. In some embodiments, the first capability information indicates that the first UE does not support sending the first signal on discontinuous and / or incomplete shared frequency domain resources, and the second capability information indicates that the second UE does not support measuring the first signal on discontinuous and / or incomplete shared frequency domain resources. In the event of an LBT failure in the first shared frequency domain resource, the first UE does not send the first signal. In some embodiments, based on the first capability information, the second capability information, and the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, the first UE does not send the first signal. Step 440b: Based on the first information, when an LBT failure occurs in the first shared frequency domain resource, a first signal is sent in the second shared frequency domain resource. The first information is related to shared spectrum access, that is, the first information is related to unlicensed frequency band access. In some embodiments, the first information includes at least one of first capability information, first configuration information, and second capability information. In some embodiments, based on the parameters of the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, the first UE sends a first signal in the second shared frequency domain resource. In some embodiments, based on the first capability information, when an LBT failure occurs in the first shared frequency domain resource, the first UE sends a first signal in the second shared frequency domain resource. In some embodiments, the first capability information indicates that the first UE supports sending a first signal on discontinuous and / or incomplete shared frequency domain resources, and when an LBT failure occurs in the first shared frequency domain resources, the first UE sends the first signal on a second shared frequency domain resource. In some embodiments, based on the second capability information, when an LBT failure occurs in the first shared frequency domain resource, the first UE sends a first signal in the second shared frequency domain resource. In some embodiments, the second capability information indicates that the second UE supports receiving the first signal on discontinuous and / or incomplete shared frequency domain resources, and when LBT failure occurs in the first shared frequency domain resources, the first UE sends the first signal on the second shared frequency domain resources. In some embodiments, the second capability information indicates that the second UE supports measuring the first signal on discontinuous and / or incomplete shared frequency domain resources, and when LBT failure occurs in the first shared frequency domain resources, the first UE sends the first signal on the second shared frequency domain resources. In some embodiments, based on the first capability information and the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, the first UE sends a first signal in the second shared frequency domain resource. In some embodiments, based on the first capability information and the second capability information, when an LBT failure occurs in the first shared frequency domain resource, the first UE sends a first signal in the second shared frequency domain resource. In some embodiments, based on the first capability information, the second capability information, and the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, the first UE sends a first signal in the second shared frequency domain resource. In some embodiments, the first UE does not send the first signal on the shared frequency domain resource where an LBT failure occurs in the first shared frequency domain resource. In some embodiments, the first UE does not send the first signal in the shared frequency domain resources where the LBT failure occurs, which can also be understood as the first UE muting the shared frequency domain resources where the LBT failure occurs. In some embodiments, the shared frequency domain resources muted by the first UE may be at the RB level or the RB-set level. For example, the first UE mutes on the RB where the LBT fails, that is, if there is an RB where the LBT fails in an RB-set, only the RB where the LBT fails is muted, and the RB where the LBT succeeds can still transmit signals. For another example, the first UE mutes on the RB-set where the LBT fails, that is, if there is an RB where the LBT fails in an RB-set, the entire RB-set is muted. In some embodiments, as described in the above “2. New Radio Unlicensed (NR-U) spectrum uplink LBT failure detection and recovery mechanism” and “5. SL-U continuous uplink LBT failure detection and recovery mechanism”, when an LBT failure occurs in the first shared frequency domain resource, the first UE may also perform steps such as LBT failure indication, RRC reconstruction, RRC reconfiguration, BWP switching, and continuous LBT failure indication. For example, when an LBT failure occurs in the first shared frequency domain resource, the first UE indicates the LBT failure to the MAC layer. For example, when an LBT failure occurs in the first shared frequency domain resource, the first UE receives a reconfiguration of the first signal. For example, when an LBT failure occurs in the first shared frequency domain resource, the first UE initiates the RRC reconstruction process. In some embodiments, the first UE further performs at least one of the following steps: Indicate to network devices the shared frequency domain resources where LBT failed; Indicate to network devices the shared frequency domain resources of successful LBT; Indicate the desired shared frequency domain resources to network devices; Indicating undesired shared frequency domain resources to network devices; Indicates the occupied shared frequency domain resources to network devices; Indicate to network devices the shared frequency domain resources that are not occupied; Indicate to other UEs the shared frequency domain resources where LBT failed; Indicate to other UEs the shared frequency domain resources of successful LBT; Indicate the desired shared frequency domain resources to other UEs; Indicate to other UEs the undesired shared frequency domain resources; Indicate the occupied shared frequency domain resources to other UEs; Indicate to other UEs the shared frequency domain resources that are not occupied. Among them, the shared frequency domain resources with LBT failure, the unexpected shared frequency domain resources, and the unoccupied shared frequency domain resources are shared frequency domain resources that cannot be used for the first signal transmission, and are referred to as unavailable shared frequency domain resources for short. The shared frequency domain resources successfully obtained by LBT, the expected shared frequency domain resources, and the occupied shared frequency domain resources belong to the shared frequency domain resources that can be used for the first signal transmission, and are referred to as available shared frequency domain resources for short. In some embodiments, one or more of shared frequency domain resources with LBT failure, unexpected shared frequency domain resources, unoccupied shared frequency domain resources, shared frequency domain resources with LBT success, expected shared frequency domain resources, and occupied shared frequency domain resources can be represented by a muting pattern. In some embodiments, the muting pattern is represented by a bitmap. In some embodiments, one or more of the shared frequency domain resources with LBT failure, the unexpected shared frequency domain resources, the unoccupied shared frequency domain resources, the shared frequency domain resources with LBT success, the expected shared frequency domain resources, and the occupied shared frequency domain resources may be sent via a MAC control element (MAC Control Element, MAC CE), and / or uplink control information (Uplink Control Information, UCI), and / or sidelink control information (Sidelink Control Information, SCI). In some embodiments, LBT failure may trigger a persistent LBT failure. In some embodiments, in the event of a persistent LBT failure, the first UE indicates the persistent LBT failure to a network device, and / or indicates the persistent LBT failure to other UEs. In some embodiments, in case of persistent LBT failure, the first UE starts a first timer. In some embodiments, during the activation of the first timer, the first UE stops sending the first signal; and / or after the first timer expires, the first UE resumes sending the first signal. In some embodiments, continuous LBT failure is determined based on an LBT detection timer (referred to as a second timer for ease of distinction) and a threshold of LBT failures. For details about continuous LBT failure, please refer to the previous text "2. New Radio Unlicensed (NR-U) spectrum uplink LBT failure detection and recovery mechanism" and "5. SL-U continuous uplink LBT failure detection and recovery mechanism", which will not be repeated here. In some embodiments, the first UE sends the first indication information and / or the second indication information. Optionally, the first UE sends the first indication information and / or the second indication information to the second UE. Optionally, the first UE sends the first indication information and / or the second indication information to the network device. Optionally, the first UE sends the first indication information and / or the second indication information to the core network element. In some embodiments, the first indication information is used to indicate that the measurement result of the first signal is determined based on incomplete shared frequency domain resources, and / or, based on discontinuous shared frequency domain resources, and / or, based on an incomplete first signal. In some embodiments, the first indication information is used to indicate that the transmission resource of the first signal is an incomplete shared frequency domain resource and / or a discontinuous shared frequency domain resource. In some embodiments, the first indication information is used to indicate that the first signal is an incomplete first signal. In some embodiments, the second indication information is used to indicate the shared frequency domain resources occupied by the first signal and / or the shared frequency domain resources not occupied by the first signal. In some embodiments, the second indication information is used to indicate a silence pattern and / or a non-silence pattern related to the first signal. In some embodiments, the second indication information is used to indicate information about shared frequency domain resources where LBT failed, and / or unexpected shared frequency domain resources, and / or unoccupied shared frequency domain resources. In some embodiments, the second indication information is used to indicate information about shared frequency domain resources for which LBT is successful, and / or expected shared frequency domain resources, and / or occupied shared frequency domain resources. In some embodiments, the second indication information is sent via MAC CE or UCI. In some embodiments, the second indication information is indicated in the form of a bitmap. In some embodiments, the first signal includes at least one of the following: Positioning Reference Signal (PRS); Perception of signals; Sidelink Positioning Reference Signal (SL-PRS); Sounding Reference Signal (SRS); Demodulation Reference Signal (DMRS); Enhanced-SRS (E-SRS); Synchronization signal; Tracking Reference Signal (TRS); Carrier Phase Reference Signal (CPRS); Channel State Information Reference Signal (CSI-RS) Among them, the perception signal refers to a signal used for perception, or a signal used to perform perception services, or a signal used to perform perception operations, or a signal used to achieve perception goals, or a signal used to obtain perception results, or a signal designed in the future for performing perception services, or a signal designed in the future for performing perception operations, or a signal designed in the future for achieving perception goals, or a signal designed in the future for obtaining perception results. It should be noted that the above steps 410, 420 and 430 are optional steps. Each of the above steps can be implemented separately, for example, step 410 is implemented separately as a capability reporting method, or step 420 is implemented separately as a configuration method, or step 430 is implemented separately as a capability interaction method, or step 440a is implemented separately as a signal transmission method, or step 440b is implemented separately as a signal transmission method. The above steps can be freely combined, for example, step 410 and step 420 are combined to implement a configuration method, or step 410 and step 430 are combined to implement a capability interaction method, or step 410 and step 440a are combined to implement a signal transmission method, or step 420 and step 440a are combined to implement a signal transmission method, or step 430 and step 440a are combined to implement a signal transmission method, or step 410 and step 440b are combined to implement a signal transmission method, or step 420 and step 440b are combined to implement a signal transmission method, or step 430 and step 440b are combined to implement a signal transmission method, or step 410, step 420 and step 440a are combined to implement a signal Transmission method, or step 410, step 430 and step 440a are combined to be implemented as a signal transmission method, or step 420, step 430 and step 440a are combined to be implemented as a signal transmission method, or step 410, step 420, step 430 and step 440a are combined to be implemented as a signal transmission method, or step 410, step 420 and step 440b are combined to be implemented as a signal transmission method, or step 410, step 430 and step 440b are combined to be implemented as a signal transmission method, or step 420, step 430 and step 440b are combined to be implemented as a signal transmission method, or step 410, step 420, step 430 and step 440b are combined to be implemented as a signal transmission method, etc. The execution order of the above steps can be adjusted according to actual conditions, for example, step 430 is before step 410, or step 430 is before step 420, or step 440a is before step 410, or step 440a is before step 420, etc. In summary, the method provided in the embodiment of the present application supports the first UE not to send the first signal when LBT fails in the shared frequency domain resources, or to send the first signal in the shared frequency domain resources where LBT succeeds, providing a feasible signal transmission solution for the situation where LBT occurs in the shared frequency domain resources, and ensuring the quality, latency and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent by the first UE is large, the LBT failure problem faced will be more serious. The method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, and provides a feasible solution for using shared spectrum to achieve high-precision positioning services and perception services. In addition, the first UE is supported to access information related to the interactive shared spectrum, so that the first signal sent is more in line with the first UE's own capabilities, and / or the configuration of the network device, and / or the capabilities / expectations of the receiver of the first signal. The introduction of the first information improves the transmission quality of the first signal and ensures the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. FIG. 13 is a flow chart of a signal transmission method provided by an exemplary embodiment of the present application. The method is executed by a network device, and the network device may be implemented as a network device as shown in FIG. 9 or FIG. 10 . The method includes at least some of the following steps: Step 520: Send first configuration information to the first UE, where the first configuration information is used to configure the first UE to send the first Parameters of the signal. The first configuration information is related to shared spectrum access. Further, the first configuration information is related to the transmission behavior of the first UE when LBT fails in the shared frequency domain resource. It can also be understood that the parameters configured by the first configuration information are related to the transmission behavior of the first UE when LBT fails in the first shared frequency domain resource. In the embodiment of the present application, the shared frequency domain resources refer to the frequency domain resources in the shared spectrum. The shared spectrum is also called a shared frequency band, or an unlicensed spectrum, or an unlicensed frequency band. The shared frequency domain resources in this application include: the shared frequency domain resources of the NR system (that is, the frequency domain resources of the NR-U band), and / or, the shared frequency domain resources of the SL (that is, the frequency domain resources of the SL-U band). For the relevant content of the first configuration information, please refer to step 420, which will not be repeated here. The sender of the first signal is the first UE, and the receiver of the first signal is a network device or other UE. The other UE includes UEs other than the first UE. That is, in the embodiment of the present application, the first UE can perform uplink transmission and / or sidelink transmission of the first signal. In some embodiments, the first signal includes a signal used for a communication service. For example, the first signal carries one or more of data information, control information, and system information. In some embodiments, the first signal includes a signal for non-communication services, such as at least one of positioning services, sensing services, etc. The first signal includes one or more of reference signals, auxiliary signals, synchronization signals, and data information. In some embodiments, the first signal includes a signal for communication traffic and a signal for non-communication traffic. In summary, the method provided in the embodiment of the present application supports the network device to send the first configuration information to the first UE to affect the transmission behavior of the first UE on the shared frequency domain resources. In particular, in the case of LBT failure in the shared frequency domain resources, the first configuration information provides a feasible solution for the reliable transmission of the first signal to ensure the delay of the first signal. Alternatively, in the case of LBT failure in the shared frequency domain resources, the first configuration information limits the transmission of the first signal to ensure resource utilization, positioning accuracy, perception accuracy, etc. The design of the first configuration information enables the network device to configure different first signal sending behaviors for first UEs with different capabilities when encountering LBT failure on one or more RB-sets based on the capabilities of the first UE. A first UE with better capabilities can still send the first signal on time even if it encounters LBT failure on one or more RB-sets, so as to ensure the transmission delay of the first signal and the delay when using the first signal to meet communication requirements, and / or positioning requirements, and / or perception requirements. The first condition is designed so that when the bandwidth / number available for sending the first signal is lower than a threshold, the first signal is not sent to save overhead. FIG14 is a flow chart of a signal transmission method provided by an exemplary embodiment of the present application, the method is performed by a second UE or a network device, the second UE may be implemented as a terminal device as shown in FIG9 or FIG10, the network device may be implemented as a network device as shown in FIG9 or FIG10, and the method includes at least some of the following steps: Step 620: Receive and / or measure a first signal sent by the first UE in the second shared frequency domain resource, where the first signal is sent when an LBT failure occurs in the first shared frequency domain resource. In the embodiment of the present application, the shared frequency domain resources refer to the frequency domain resources in the shared spectrum. The shared spectrum is also called a shared frequency band, or an unlicensed spectrum, or an unlicensed frequency band. The shared frequency domain resources in this application include: the shared frequency domain resources of the NR system (that is, the frequency domain resources of the NR-U band), and / or, the shared frequency domain resources of the SL (that is, the frequency domain resources of the SL-U band). For the relevant content of the first signal, refer to step 320. For the relevant content of the first shared frequency domain resource and the second shared frequency domain resource, refer to the embodiments shown in Figures 11, 12, and 13. No further details will be given here. In summary, the method provided in the embodiment of the present application supports the second UE or network device to receive the first signal sent by the first UE when an LBT failure occurs in the first shared frequency domain resource, and supports the second UE or network device to obtain one or more of data information, positioning results, perception results, etc. by measuring the first signal. In the event of an LBT failure in the shared frequency domain resource, the second UE or network device is still supported to implement communication services and non-communication services in the SL-U frequency band, ensuring the positioning requirements and perception requirements that need to be met by using the shared frequency domain resources. As mentioned above, the shared frequency domain resources in this application include: the shared frequency domain resources of the NR system, and / or the shared frequency domain resources of the SL. Considering that the receiving parties of these two types of shared frequency domain resources are different, the following will introduce the situation where the LBT failure occurs in the shared frequency domain resources of the NR system, and the situation where the LBT failure occurs in the shared frequency domain resources of the SL. 1. Shared frequency domain resources of NR system, namely NR-U band In this case, the receiver of the first signal is the network device. It can also be understood that the first signal can be an uplink transmission signal, and the LBT failure discussed below occurs in the NR-U frequency band. FIG. 15 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application. The method is performed by the first UE shown in FIG. 11 , and the method includes at least some of the following steps: Step 710: Send first capability information to a network device, where the first capability information is used to indicate whether the first UE supports sending a first signal on discontinuous and / or incomplete shared frequency domain resources. For related content, please refer to step 410, which will not be repeated here. In some embodiments, the first capability information is carried by SharedSpectrumChAccessParamsPerBand IE, or by Carried by Phy-ParametersSharedSpectrumChAccess IE in UE-NR-Capability. Step 720: Receive first configuration information from a network device, where the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource. For related content, please refer to step 420, which will not be repeated here. In some embodiments, the first configuration information is a BWP-level configuration, which can also be understood as the first configuration information is for each BWP (Per BWP). A BWP includes one or more RB-sets. In some embodiments, the first configuration information includes configuration information about the first signal corresponding to one or more BWPs respectively. In some embodiments, the network device configures a resource set list and / or a resource list of the first signal for the first UE in the BWP-UplinkDedicated corresponding to each BWP, wherein each resource set list includes one or more resources. Taking the first signal including the positioning SRS as an example, the network device configures the SRS-PosResourceSet list and SRS-PosResource list of the positioning SRS for the UE in the SRS-config in the BWP-UplinkDedicated corresponding to each BWP, where each SRS-PosResourceSet resource set contains one or more SRS-PosResource resources. Step 730a: Based on the first capability information and / or the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, a first signal is not sent to the network device. For related content, please refer to step 440a, which will not be repeated here. In some embodiments, when the configuration of the first capability information and / or the first configuration information is not satisfied, the first UE does not send the first signal to the network device. In some embodiments, the physical layer of the first UE also indicates the LBT failure to the MAC layer. When the MAC layer triggers a persistent LBT failure, the first UE reports the persistent LBT failure associated with the first signal to the network device, and / or expects the reconfiguration of the first signal. For details, please refer to the relevant content described in the previous "2. New Radio Unlicensed (NR-U) spectrum uplink LBT failure detection and recovery mechanism". Step 730b: Based on the first capability information and / or the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, a first signal is sent to the network device in the second shared frequency domain resource. For related content, please refer to step 440b, which will not be repeated here. In some embodiments, when the configuration of the first capability information and / or the first configuration information is met, the first UE sends a first signal to the network device in the shared frequency domain resources (i.e., the second shared frequency domain resources) where LBT succeeds, and does not send the first signal in the shared frequency domain resources where LBT fails, i.e., the shared frequency domain resources where LBT fails are muted. In some embodiments, the physical layer of the first UE also indicates the LBT failure to the MAC layer. When the MAC layer triggers a persistent LBT failure, the first UE reports the persistent LBT failure associated with the first signal to the network device. For details, please refer to the relevant content described in the previous "2. New Radio Unlicensed (NR-U) spectrum uplink LBT failure detection and recovery mechanism". In some embodiments, the first UE sends a MAC CE or UCI to the network device, and the MAC CE or UCI indicates a silence pattern and / or a non-silence pattern to the network device in the form of a bitmap. In some embodiments, the first UE sends a MAC CE or UCI to the network device, which carries information indicating shared frequency domain resources that failed LBT, and / or unexpected shared frequency domain resources, and / or unoccupied shared frequency domain resources. In some embodiments, the first UE sends a MAC CE or UCI to the network device, which carries information indicating shared frequency domain resources for successful LBT, and / or expected shared frequency domain resources, and / or occupied shared frequency domain resources. In some embodiments, in case of persistent LBT failure, the first UE starts a first timer. In some embodiments, during the activation of the first timer, the first UE stops sending the first signal; and / or after the first timer expires, the first UE resumes sending the first signal. In some embodiments, the first UE sends the first indication information and / or the second indication information to the network device. In some embodiments, the first UE sends first indication information and / or second indication information to a core network element. For the relevant contents of the first indication information and the second indication information, reference may be made to the embodiment, step 850 and step 860 shown in FIG. 12 , and will not be described in detail here. It should be noted that step 710 and step 720 are optional steps. Each of the above steps may be implemented separately, for example, step 710 may be implemented separately as a capability reporting method, or step 720 may be implemented separately as a configuration method, or step 730a may be implemented separately as a signal transmission method, or step 730b may be implemented separately as a signal transmission method. The above steps can be freely combined, for example, step 710 and step 720 are combined to implement a configuration method, or step 710 and step 730a are combined to implement a signal transmission method, or step 720 and step 730a are combined to implement a signal transmission method, or step 710, step 720, and step 730a are combined to implement a signal transmission method, or step 710, step 720, and step 730b are combined to implement a signal transmission method, etc. In summary, the method provided in the embodiment of the present application enables the first UE to perform the first signal-related actions in accordance with its own capabilities and / or the configuration of the network equipment when LBT failure occurs in the shared frequency domain resources within the NR system, thereby ensuring the quality and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent by the first UE is large, the LBT failure problem faced In more serious cases, the method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, thereby improving the transmission quality of the first signal to meet the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. FIG. 16 is a flow chart of a signal transmission method provided by an exemplary embodiment of the present application. The method is executed by the network device shown in FIG. 9 , FIG. 10 , or FIG. 13 . The method includes at least some of the following steps: Step 810: Receive first capability information sent by a first UE, where the first capability information is used to indicate whether the first UE supports sending a first signal on discontinuous and / or incomplete shared frequency domain resources. For related content, please refer to step 410, which will not be repeated here. In some embodiments, the first capability information is carried by SharedSpectrumChAccessParamsPerBand IE, or by Phy-ParametersSharedSpectrumChAccess IE in UE-NR-Capability. Step 820: Send first configuration information to the first UE, where the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource. For related content, please refer to step 420, which will not be repeated here. In some embodiments, the first configuration information is a BWP-level configuration, which can also be understood as the first configuration information is for each BWP (Per BWP). A BWP includes one or more RB-sets. In some embodiments, the first configuration information includes configuration information about the first signal corresponding to one or more BWPs respectively. In some embodiments, the network device configures a resource set list and / or a resource list of the first signal for the first UE in the BWP-UplinkDedicated corresponding to each BWP, wherein each resource set list includes one or more resources. Taking the first signal including the positioning SRS as an example, the network device configures the SRS-PosResourceSet list and SRS-PosResource list of the positioning SRS for the UE in the SRS-config in the BWP-UplinkDedicated corresponding to each BWP, where each SRS-PosResourceSet resource set contains one or more SRS-PosResource resources. Step 830: Receive and / or measure a first signal sent by a first UE. In some embodiments, no LBT failure occurs on the first shared frequency domain resource, or the LBT on the first shared frequency domain resource succeeds, and the first UE sends a first signal through the first shared frequency domain resource. In some embodiments, LBT failure occurs in the first shared frequency domain resource, and the first UE sends the first signal through the second shared frequency domain resource, or the first UE does not send the first signal. In which, when the first UE does not send the first signal, the network device does not receive and / or does not measure the first signal sent by the first UE. In some embodiments, the network device receives and / or measures the first signal to obtain a measurement result of the first signal. If the first signal carries data information, the network device receives and / or measures the first signal to obtain the data information carried by the first signal. If the first signal is used for positioning services / or perception services, the network device receives and / or measures the first signal to obtain a measurement result related to the positioning services / or perception services corresponding to the first signal. For the reception and measurement of the first signal, please refer to the relevant content in "6. Uu Positioning (Positioning)" above. In short, the network device can measure the first signal based on one or more of the first capability information, the first configuration information, the first indication information, and the second indication information to obtain a measurement quantity related to the positioning service and / or the perception service, and the measurement quantity includes at least one of the following: departure angle, arrival angle, distance, distance difference, signal quality of the first signal, delay, moving speed, phase, etc. Among them, the signal quality of the first signal can be expressed by at least one of the following: a reference signal received power (Reference Signal Receiving Power, RSRP) value, a reference signal strength indication (Reference Signal Strength Indicator, RSSI) value, a reference signal received quality (Reference Signal Receiving Quality, RSRQ) value, a signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) value, a cross link interference (Cross Link Interference, CLI) value, and a channel state information (Channel State Information, CSI) value. In the present application, perception can be equivalent to or replaced by at least one of the following: positioning, ranging, speed measurement, angle measurement, target imaging, target detection, target tracking, and target recognition. Step 840: Receive information sent by the first UE to indicate LBT failure and / or continuous LBT failure. In some embodiments, an LBT failure occurs in the first shared frequency domain resource, and the network device receives indication information from the first UE, where the indication information is used to indicate an LBT failure associated with the first signal. For details, please refer to the relevant content described in the previous "2. New Radio Unlicensed (NR-U) spectrum uplink LBT failure detection and recovery mechanism". In some embodiments, a continuous LBT failure occurs in the first shared frequency domain resource, and the network device receives indication information from the first UE, where the indication information is used to indicate a continuous LBT failure associated with the first signal. For details, please refer to the relevant content described in the previous "2. New Radio Unlicensed (NR-U) spectrum uplink LBT failure detection and recovery mechanism". In some embodiments, the network device performs one or more steps of the RRC reconstruction process, the RLF process, the reconfiguration of the first signal, etc. For details, please refer to the relevant content described in the previous "2. New Radio Unlicensed (NR-U) spectrum uplink LBT failure detection and recovery mechanism". Step 850: Receive first indication information sent by the first UE. In some embodiments, the first indication information is used to indicate that the measurement result of the first signal is determined based on incomplete shared frequency domain resources, and / or, based on discontinuous shared frequency domain resources, and / or, based on an incomplete first signal. In some embodiments, the first indication information is used to indicate that the transmission resource of the first signal is an incomplete shared frequency domain resource and / or a discontinuous shared frequency domain resource. In some embodiments, the first indication information is used to indicate that the first signal is an incomplete first signal. The first indication information helps the network device to determine whether the first signal and the transmission resource of the first signal are complete and continuous, and whether the measurement result of the first signal meets the accuracy and resolution requirements; or, whether the measurement result of the first signal is available; or, whether the network device adopts a reasonable measurement method to reduce the negative impact of incomplete and discontinuous transmission resources. The first indication information helps to ensure the accuracy of positioning results and perception results. Step 860: Receive second indication information sent by the first UE. In some embodiments, the second indication information is used to indicate the shared frequency domain resources occupied by the first signal and / or the shared frequency domain resources not occupied by the first signal. In some embodiments, the second indication information is used to indicate a silence pattern and / or a non-silence pattern related to the first signal. In some embodiments, the second indication information is used to indicate information about shared frequency domain resources where LBT failed, and / or unexpected shared frequency domain resources, and / or unoccupied shared frequency domain resources. In some embodiments, the second indication information is used to indicate information about shared frequency domain resources for which LBT is successful, and / or expected shared frequency domain resources, and / or occupied shared frequency domain resources. In some embodiments, the second indication information is sent via MAC CE or UCI. In some embodiments, the second indication information is indicated in the form of a bitmap. Step 870: Send the measurement result of the first signal to the core network element. If the first signal is used for positioning services and / or sensing services, the core network element at least includes LMF and / or sensing network element (Sensing Function). For the interaction between the core network element and the first UE and the network device, please refer to the relevant content in "6. Uu Positioning (Positioning)" above. In short, the core network element aggregates, calculates, and processes the measurement results of the first signal to determine the positioning result and / or the perception result, which will not be repeated here. In some embodiments, the network device further sends first indication information to the core network element, and / or sends second indication information to the core network element. The first indication information helps the core network element to determine whether the first signal and the transmission resource of the first signal are complete and continuous, and whether the measurement result of the first signal meets the accuracy requirement and the resolution requirement; or, whether the measurement result of the first signal is available; or, whether the core network element adopts a reasonable calculation method to reduce the negative impact of incomplete and discontinuous transmission resources. The network device sends the first indication information to the core network element, which helps to ensure the accuracy of the positioning result and the perception result. The second indication information helps the core network element to clarify one or more of the following information: whether the first UE faces LBT failure, whether the first UE faces continuous LBT failure, the shared frequency domain resources where the LBT failure occurs, and the shared frequency domain resources expected by the first UE, so that the core network element can configure more reasonable shared frequency domain resources for the first UE, and / or parameter configuration related to shared spectrum access. It should be noted that step 810, step 830, step 840, step 850, step 860, and step 870 are optional steps. Each of the above steps can be implemented separately, for example, step 810 is implemented separately as a capability reporting method, or step 820 is implemented separately as a configuration method, or step 830 is implemented separately as a signal transmission method, or step 840 is implemented separately as an information indication method, or step 850 is implemented separately as an information indication method, or step 860 is implemented separately as an information indication method, or step 870 is implemented separately as a measurement reporting method. The above steps can be freely combined, for example, step 810 and step 820 are combined to implement a configuration method, or step 810 and step 830 are combined to implement a signal transmission method, or step 820 and step 830 are combined to implement a signal transmission method, or step 810, step 820, step 830 are combined to implement a signal transmission method, or step 810, step 820, step 830 are combined to implement a signal transmission method, or step 810, step 820, step 840 are combined to implement an information transmission method, or step 840, step 850, step 860 are combined to implement an information indication method, or step 830, step 870 are implemented as a measurement reporting method, or step 810, step 820, step 830, step 870 are implemented as a measurement reporting method, or step 810, step 820, step 830, step 850, step 860, step 870 are implemented as a measurement reporting method, and the like. The above steps can be combined or split. For example, step 840 can be split into a step of performing a step of receiving information indicating a LBT failure and a step of performing a step of receiving information indicating a continuous LBT failure. For example, step 850 and step 860 can be combined into one step, or step 840, step 850 and step 860 can be combined into one step, etc. The execution order of the above steps can be adjusted according to actual conditions. For example, step 860 is before step 840, or step 860 is before step 850, or step 850 is before step 840, or step 840 is before step 830, or step 850 is before step 830, or step 860 is before step 830, etc. In summary, the method provided in the embodiment of the present application enables the first UE to perform a first signal-related behavior in accordance with its own capabilities and / or the configuration of the network device when an LBT failure occurs in the shared frequency domain resources within the NR system, and provides a communication service on the shared spectrum, Non-communication services guarantee quality and efficiency. Especially when the bandwidth of the first signal to be sent by the first UE is large and the LBT failure problem is more serious, the method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, thereby improving the transmission quality of the first signal to meet the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. In addition, it supports the exchange of first indication information and second indication information between the first UE and the network device, and between the network device and the core network element, which helps to ensure the accuracy of positioning results and perception results when the first signal is incomplete or the transmission resources of the first signal are incomplete or discontinuous. The behavior of the core network element side corresponding to the embodiments shown in Figures 15 and 16 can refer to the relevant content in "6. Uu Positioning (Positioning)" above. In short, the core network element receives the measurement result of the first signal and obtains the positioning result and / or perception result related to the first signal. 2. SL’s shared frequency domain resources, namely the SL-U band In this case, the receiver of the first signal is the second UE. It can also be understood that the first signal can be a sideline transmission signal, and the LBT failure discussed below occurs in the SL-U frequency band. The first UE and the second UE may be in an OOC scenario, an IC scenario, or a PC scenario. Therefore, the first signal may be transmitted between the first UE and the second UE with the help of a network device or a third UE. Alternatively, the first UE and the second UE may transmit the first signal without the help of other devices. Next, the situations related to the first signal transmission in the IC scenario, OOC scenario, and PC scenario are introduced respectively. 1. The receiver of the first signal is the second UE, and the first UE and the second UE are in an IC scenario In this case, the network device receives the first capability information of the first UE and / or the second capability information of the second UE, and the network device sends the first configuration information to the first UE and / or sends the second configuration information to the second UE. The first capability information and the first configuration information are related to the signal transmission of the first UE on the SL shared spectrum, and the second capability information and the second configuration information are related to the signal reception and / or measurement of the second UE on the SL shared spectrum. Optionally, the second capability information and the second configuration information are related to the reception and / or measurement behavior of the second UE in the event of LBT failure in the first shared frequency domain resources. FIG. 17 is a schematic flow chart of a signal transmission method provided by an exemplary embodiment of the present application. The method is executed by the first UE shown in FIG. 11 . The method includes at least some of the following steps: Step 910: Send first capability information to a network device, where the first capability information is used to indicate whether the first UE supports sending a first signal on discontinuous and / or incomplete shared frequency domain resources. For related content, please refer to step 410, which will not be repeated here. In some embodiments, the first capability information is carried by SharedSpectrumChAccessParamsPerBand IE, or by Phy-ParametersSharedSpectrumChAccess IE in UE-NR-Capability. It should be noted that the first capability information in step 610 and the first capability information in step 510 may be the same or different. That is to say, the first capability information corresponding to the case where the recipient of the first signal is a network device is the same as or different from the first capability information corresponding to the case where the recipient of the first signal is a second UE. That is to say, when the first signal is an uplink signal, the capabilities supported by the first UE itself are the same as or different from those when the first signal is a sidelink signal. Although the first capability information in step 610 and the first capability information in step 510 are both sent by the first UE to the network device, the two first capability information can adopt the same indication method, or the two first capability information can be indicated by the same signal, or the two first capability information can be indicated separately. Step 920: Receive first configuration information from a network device, where the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource. For related content, please refer to step 420 and step 520, which will not be repeated here. In some embodiments, the first configuration information is a BWP-level configuration, which can also be understood as the first configuration information is for each BWP (Per BWP). A BWP includes one or more RB-sets. In some embodiments, the first configuration information includes configuration information about the first signal corresponding to one or more BWPs respectively. In some embodiments, the network device configures a resource set list and / or a resource list of the first signal for the first UE in the BWP-UplinkDedicated corresponding to each BWP, wherein each resource set list includes one or more resources. Taking the first signal including the positioning SRS as an example, the network device configures the SRS-PosResourceSet list and SRS-PosResource list of the positioning SRS for the UE in the SRS-config in the BWP-UplinkDedicated corresponding to each BWP, where each SRS-PosResourceSet resource set contains one or more SRS-PosResource resources. In some embodiments, the first configuration information is determined based on the first capability information and / or the second capability information. It can also be understood that the first configuration information configured by the network device may only consider the capability / expectation of the first UE side, may only consider the capability / expectation of the second UE side, or may comprehensively consider the capability / expectation of the first UE side and the second UE side. Step 930a: Based on the first capability information and / or the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, The first signal is not sent to the second UE. For related content, please refer to step 440a, which will not be repeated here. In some embodiments, when the first capability information and / or the first configuration information is not satisfied, the first UE does not send the first signal to the second UE. In some embodiments, the physical layer of the first UE also indicates the LBT failure to the MAC layer. When the MAC layer triggers a persistent LBT failure, the first UE reports the persistent LBT failure associated with the first signal to the network device, and / or expects the reconfiguration of the first signal. For details, please refer to the relevant content described in "5. SL-U persistent uplink LBT failure detection and recovery mechanism" above. Step 930b: Based on the first capability information and / or the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, send a first signal to the second UE in the second shared frequency domain resource. For related content, please refer to step 440b, which will not be repeated here. In some embodiments, when the first capability information and / or the first configuration information are met, the first UE sends a first signal to the second UE in the shared frequency domain resources where LBT succeeds (i.e., the second shared frequency domain resources), and does not send the first signal in the shared frequency domain resources where LBT fails, i.e., the shared frequency domain resources where LBT fails are muted. In some embodiments, the physical layer of the first UE also indicates the LBT failure to the MAC layer. When the MAC layer triggers a persistent LBT failure, the first UE reports the persistent LBT failure associated with the first signal to the network device. For details, please refer to the relevant content described in "5. SL-U persistent uplink LBT failure detection and recovery mechanism" above. In some embodiments, the first UE sends a MAC CE or UCI to the network device, and the MAC CE or UCI indicates a silence pattern and / or a non-silence pattern to the network device in the form of a bitmap. In some embodiments, the first UE sends a MAC CE or UCI to the network device, which carries information indicating shared frequency domain resources that failed LBT, and / or unexpected shared frequency domain resources, and / or unoccupied shared frequency domain resources. In some embodiments, the first UE sends a MAC CE or UCI to the network device, which carries information indicating shared frequency domain resources for successful LBT, and / or expected shared frequency domain resources, and / or occupied shared frequency domain resources. In some embodiments, the first UE sends first indication information and / or second indication information to the second UE. In some embodiments, the first UE sends the first indication information and / or the second indication information to the network device. In some embodiments, the first UE sends first indication information and / or second indication information to a core network element. For the relevant contents of the first indication information and the second indication information, please refer to the embodiment shown in FIG. 12 , step 1040 , step 1050 , and step 1160 , which will not be described in detail here. In some embodiments, in case of persistent LBT failure, the first UE starts a first timer. In some embodiments, during the activation of the first timer, the first UE stops sending the first signal; and / or after the first timer expires, the first UE resumes sending the first signal. It should be noted that step 910 and step 920 are optional steps. Each of the above steps may be implemented separately, for example, step 910 may be implemented separately as a capability reporting method, or step 920 may be implemented separately as a configuration method, or step 930a may be implemented separately as a signal transmission method, or step 930b may be implemented separately as a signal transmission method. The above steps can be freely combined, for example, step 910 and step 920 are combined to implement a configuration method, or step 910 and step 930a are combined to implement a signal transmission method, or step 920 and step 930a are combined to implement a signal transmission method, or step 910, step 920, and step 930a are combined to implement a signal transmission method, or step 910, step 920, and step 930b are combined to implement a signal transmission method, etc. In summary, the method provided in the embodiment of the present application enables the first UE to perform the first signal-related actions in accordance with the first UE capabilities and / or the second UE capabilities and / or the configuration of the network device when an LBT failure occurs in the side-by-side shared frequency domain resources, thereby ensuring the quality and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent by the first UE is large and the LBT failure problem faced is more serious, the method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, thereby improving the transmission quality of the first signal to meet the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. FIG. 18 is a schematic flow chart of a signal transmission method provided by an exemplary embodiment of the present application. The method is performed by a second UE. The second UE may be implemented as a terminal device as shown in FIG. 9 or FIG. 10. The method includes at least some of the following steps: Step 1010: Send second capability information to the network device, where the second capability information is used to indicate whether the second UE supports receiving and / or measuring the first signal in discontinuous and / or incomplete shared frequency domain resources. For the relevant content of the second capability information, please refer to step 430, which will not be repeated here. The shared frequency domain resources in the embodiment of the present application include: shared frequency domain resources of SL (ie, frequency domain resources of the SL-U frequency band). In some embodiments, the second capability information is carried by SharedSpectrumChAccessParamsPerBand IE, or by Phy-ParametersSharedSpectrumChAccess IE in UE-NR-Capability. Step 1020: Receive second configuration information from the network device, where the second configuration information is used to configure the second UE to receive and / or measure parameters of the first signal in the shared frequency domain resources. In some embodiments, the parameters configured by the second configuration information are related to the reception and / or measurement behavior of the second UE when LBT failure occurs in the first shared frequency domain resource. In some embodiments, the second configuration information is a BWP-level configuration, which can also be understood as the second configuration information is for each BWP (Per BWP). A BWP includes one or more RB-sets. In some embodiments, the second configuration information includes configuration information about the first signal corresponding to one or more BWPs respectively. In some embodiments, the second configuration information includes at least one of the following parameters: time domain resources of the first signal; frequency domain resources of the first signal; resource type of the first signal; comb tooth size of the first signal; sequence ID of the first signal; power control parameters of the first signal; and spatial relationship information of the first signal. For related content, please refer to step 420, which will not be repeated here. In some embodiments, the second configuration information is determined based on the first capability information and / or the second capability information. It can also be understood that the second configuration information configured by the network device may only consider the capability / expectation of the first UE side, or only consider the capability / expectation of the second UE side, or may comprehensively consider the capability / expectation of the first UE side and the second UE side. Step 1030: Receive and / or measure a first signal sent by a first UE. In the embodiment of the present application, the shared frequency domain resources refer to the frequency domain resources in the shared spectrum. The shared spectrum is also called a shared frequency band, or an unlicensed spectrum, or an unlicensed frequency band. The shared frequency domain resources in the embodiment of the present application include the shared frequency domain resources of SL (ie, the frequency domain resources of the SL-U frequency band). In some embodiments, no LBT failure occurs on the first shared frequency domain resource, or the LBT on the first shared frequency domain resource succeeds, and the first UE sends a first signal through the first shared frequency domain resource. In some embodiments, LBT failure occurs in the first shared frequency domain resource, and the first UE sends the first signal through the second shared frequency domain resource, or the first UE does not send the first signal. In which, when the first UE does not send the first signal, the second UE does not receive and / or does not measure the first signal sent by the first UE. In some embodiments, the second UE receives and / or measures the first signal based on one or more of the first capability information, the first configuration information, the second capability information, and the second configuration information. In some embodiments, the second UE receives and / or measures the first signal to obtain a measurement result of the first signal. If the first signal carries data information, the second UE receives and / or measures the first signal to obtain the data information carried by the first signal. If the first signal is used for positioning services / or perception services, the second UE receives and / or measures the first signal to obtain a measurement result related to the positioning services / or perception services corresponding to the first signal. For the reception and measurement of the first signal, please refer to the relevant content in "9. SL positioning" above. In short, the second UE can measure the first signal based on one or more of the first capability information, the first configuration information, the first indication information, and the second indication information, and obtain the measurement quantity related to the positioning service and / or the perception service, and the measurement quantity includes at least one of the following: departure angle, arrival angle, distance, distance difference, signal quality of the first signal, delay, moving speed, phase, etc. The signal quality of the first signal may be represented by at least one of the following: RSRP value, RSSI value, RSRQ value, SINR value, CLI value, and CSI value. In the present application, perception can be equivalent to or replaced by at least one of the following: positioning, ranging, speed measurement, angle measurement, target imaging, target detection, target tracking, and target recognition. Step 1040: Receive first indication information sent by the first UE. In some embodiments, the first indication information is used to indicate that the measurement result of the first signal is determined based on incomplete shared frequency domain resources, and / or, based on discontinuous shared frequency domain resources, and / or, based on an incomplete first signal. In some embodiments, the first indication information is used to indicate that the transmission resource of the first signal is an incomplete shared frequency domain resource and / or a discontinuous shared frequency domain resource. In some embodiments, the first indication information is used to indicate that the first signal is an incomplete first signal. The first indication information helps the second UE to determine whether the first signal and the transmission resource of the first signal are complete and continuous, and whether the measurement result of the first signal meets the accuracy and resolution requirements; or, whether the measurement result of the first signal is available; or, the second UE can take a reasonable measurement method to reduce the negative impact of incomplete and discontinuous transmission resources. The first indication information helps to ensure the accuracy of positioning results and perception results. Step 1050: Receive second indication information sent by the first UE. In some embodiments, the second indication information is used to indicate the shared frequency domain resources occupied by the first signal and / or the shared frequency domain resources not occupied by the first signal. In some embodiments, the second indication information is used to indicate a silence pattern and / or a non-silence pattern related to the first signal. In some embodiments, the second indication information is used to indicate information about shared frequency domain resources where LBT failed, and / or unexpected shared frequency domain resources, and / or unoccupied shared frequency domain resources. In some embodiments, the second indication information is used to indicate information about shared frequency domain resources for which LBT is successful, and / or expected shared frequency domain resources, and / or occupied shared frequency domain resources. In some embodiments, the second indication information is sent via MAC CE or SCI. In some embodiments, the second indication information is indicated in the form of a bitmap. Step 1060: Send the measurement result of the first signal. In some embodiments, the second UE sends the measurement result of the first signal to the network device, and the network device sends the measurement result of the first signal to the core network element. If the first signal is used for positioning services and / or sensing services, the core network element at least includes LMF and / or sensing network element (Sensing Function). The interaction between the core network element and the first UE, the second UE, and the network device can refer to the embodiment shown in Figure 6. The core network element summarizes, calculates, and processes the measurement results of the first signal to determine the positioning results and / or perception results, which will not be repeated here. In some embodiments, the second UE further sends the first indication information and / or the second indication information to the network device. The network device sends the first indication information and / or the second indication information to the core network element. In some embodiments, the second UE also sends first indication information and / or second indication information to the core network element. The first indication information helps the core network element to determine whether the first signal and the transmission resource of the first signal are complete and continuous, and whether the measurement result of the first signal meets the accuracy requirement and the resolution requirement; or, it helps the core network element to determine whether the measurement result of the first signal is available; or, it helps the core network element to adopt a reasonable calculation method to reduce the negative impact caused by incomplete and discontinuous transmission resources. The second UE sends the first indication information, which helps to ensure the accuracy of the positioning result and the perception result. The second indication information helps the core network element to clarify one or more of the following information: whether the first UE faces LBT failure, whether the first UE faces continuous LBT failure, the shared frequency domain resources where the LBT failure occurs, and the shared frequency domain resources expected by the first UE, so that the core network element can configure more reasonable shared frequency domain resources for the first UE, and / or parameter configuration related to shared spectrum access. It should be noted that step 1010, step 1020, step 1040, step 1050, and step 1060 are optional steps. Each of the above steps may be implemented separately, for example, step 1010 may be implemented separately as a capability reporting method, or step 1020 may be implemented separately as a configuration method, or step 1040 may be implemented separately as an information indication method, or step 1050 may be implemented separately as an information indication method, or step 1060 may be implemented separately as a measurement reporting method. The above steps can be freely combined, for example, step 1010 and step 1020 are combined to implement a configuration method, or step 1010 and step 1030 are combined to implement a measurement method, or step 1020 and step 1030 are combined to implement a measurement method, or step 1010, step 1020, and step 1030 are combined to implement a measurement method, or step 1040 and step 1050 are combined to implement an information indication method, or step 1030, step 1040, and step 1050 are combined to implement a measurement method, or step 1010, step 1020, step 1030, step 1040, and step 1050 are combined to implement a measurement method, or step 1030 and step 1060 are combined to implement a measurement reporting method, or step 1030, step 1040, step 1050, and step 1060 are combined to implement a measurement method, and the like. In summary, the method provided in the embodiment of the present application enables, in the event of an LBT failure in the side-link shared frequency domain resources, the behavior related to the first signal performed by the first UE to comply with the first UE's own capabilities and / or the second UE's capabilities and / or the configuration of the network equipment, thereby ensuring the quality and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent by the first UE is large and the LBT failure problem faced is more serious, the method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, thereby improving the transmission quality of the first signal to meet the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. In the event of an LBT failure in the side-link shared frequency domain resources, the communication transmission, positioning services, and perception services on the side-link shared frequency domain resources are guaranteed. In addition, it supports the exchange of first indication information and second indication information between the second UE and the network device, and between the network device and the core network element, which helps to ensure the accuracy of positioning results and perception results when the first signal is incomplete or the transmission resources of the first signal are incomplete or discontinuous. FIG. 19 is a flow chart of a signal transmission method provided by an exemplary embodiment of the present application. The method is performed by the network device shown in FIG. 9 , FIG. 10 , or FIG. 13 . The method includes at least some of the following steps: Step 1110: Receive first capability information sent by the first UE. For related content, please refer to step 410 and step 910, which will not be repeated here. Step 1120: Send first configuration information to the first UE. For related content, please refer to step 420, step 520, and step 920, which will not be repeated here. Step 1130: Receive second capability information sent by the second UE. For related content, please refer to step 1010, which will not be repeated here. Step 1140: Send second configuration information to the second UE. For related content, please refer to step 1020, which will not be repeated here. Step 1150: Receive a measurement result of the first signal sent by the second UE. For related content, please refer to step 1060, which will not be repeated here. Step 1160: Receive first indication information and / or first indication information. In some embodiments, the network device receives the first indication information and / or the first indication information sent by the first UE. Step 440b and step 930b are not described in detail here. In some embodiments, the network device receives the first indication information and / or the first indication information sent by the second UE. For related contents, please refer to step 1040, step 1050, and step 1060, which will not be repeated here. FIG19 takes the first indication information received by the network device and / or the first indication information coming from the second UE as an example, but it does not mean denying the situation where the first indication information and / or the first indication information comes from the first UE. Step 1170: Send the first indication information and / or the second indication information. In some embodiments, the network device sends the first indication information and / or the second indication information to the core network element. For related content, please refer to step 870 and step 1060, which will not be repeated here. Step 1180: Send the measurement result of the first signal. In some embodiments, the network device sends the measurement result of the first signal to the core network element. For related content, please refer to step 870 and step 1060, which will not be repeated here. It should be noted that step 1110, step 1130, step 1140, step 1150, step 1160, step 1170, and step 1180 are optional steps. Each of the above steps can be implemented individually, for example, step 1110 is implemented individually as a capability reporting method, or step 1120 is implemented individually as a configuration method, or step 1130 is implemented individually as a capability reporting method, or step 1140 is implemented individually as a configuration method, or step 1150 is implemented individually as a measurement reporting method, or step 1160 is implemented individually as an information indication method, or step 1170 is implemented individually as an information indication method, or step 1180 is implemented individually as a measurement reporting method. The above steps can be freely combined, for example, step 1110 and step 1120 are combined to implement a configuration method, or step 1110 and step 1130 are combined to implement a capability reporting method, or step 1130 and step 1140 are combined to implement a configuration method, or step 1120 and step 1140 are combined to implement a configuration method, or step 1160 and step 1170 are combined to implement an information indication method, or step 1160, step 1160, and step 1170 are combined to implement an information transmission method. , or step 1160, step 1170, and step 1180 are combined to be implemented as a measurement reporting method, or step 1150 and step 1180 are implemented as a measurement reporting method, or step 1110, step 1120, step 1130, step 1140, step 1150, and step 1180 are implemented as a measurement reporting method, or step 1110, step 1120, step 1130, step 1140, step 1150, step 1170, and step 1180 are implemented as a measurement reporting method, etc. The above steps can be combined or split. For example, step 1160 can be split into a step of receiving the first indication information and a step of receiving the second indication information. For example, step 1170 can be split into a step of sending the first indication information and a step of sending the second indication information. For example, step 1150 and step 1160 can be combined into one step. For example, step 1170 and step 1180 can be combined into one step, and so on. The execution order of the above steps can be adjusted according to actual conditions, for example, step 1130 is before step 1110, or step 1140 is before step 1120, or step 1160 is before step 1150, or step 1180 is before step 1170, etc. In summary, the method provided in the embodiment of the present application enables, in the event of an LBT failure in the side-link shared frequency domain resources, the actions related to the first signal performed by the first UE and the second UE to comply with their own capabilities and / or the capabilities of the other end and / or the configuration of the network equipment, thereby ensuring the quality and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent by the first UE is large and the LBT failure problem faced is more serious, the method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, improves the transmission quality of the first signal, and meets the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. In the event of an LBT failure in the side-link shared frequency domain resources, the communication transmission, positioning services, and perception services on the side-link shared frequency domain resources are guaranteed. In addition, it supports the exchange of first indication information and second indication information between the second UE and the network device, and between the network device and the core network element, which helps to ensure the accuracy of positioning results and perception results when the first signal is incomplete or the transmission resources of the first signal are incomplete or discontinuous. The behavior of the core network element side corresponding to the embodiments shown in Figures 17, 18, and 19 can refer to the relevant content in "9. SL positioning" above. In short, the core network element receives the measurement result of the first signal and obtains the positioning result and / or perception result related to the first signal. 2. The receiver of the first signal is the second UE, and the first UE and the second UE are in an OOC scenario In this case, both the first UE and the second UE are out of network coverage. The first UE and the second UE perform signal transmission through the third UE, or the first UE and the second UE perform signal transmission without the aid of other UEs. The third UE or service UE may play a role similar to that of a network device and / or a core network element. (1) The first UE and the second UE transmit signals through the third UE In this case, the behavior of the first UE can refer to the embodiment shown in Figure 17, but there are the following differences: Difference 1, the behavior of the first UE exchanging the first capability information and the first configuration information with the network device occurs when the first UE is within the coverage of the network; or, the first UE and the network device do not exchange the first capability information and the first configuration information. Difference 2, the behavior of the first UE sending the first signal or not sending the first signal may not be based on the first capability information and / or the first configuration information. In this case, the behavior of the second UE can refer to the embodiment shown in FIG. 18, but there are the following differences: Difference 1, the behavior of exchanging the second capability information and the second configuration information between the second UE and the network device occurs during the period when the second UE is within the coverage of the network; or, The second capability information and the second configuration information are not exchanged between the second UE and the network device. Distinction 2: The second UE may not receive and / or measure the first signal based on the second capability information and the second configuration information. Distinction 3: The second UE sends one or more of the measurement result of the first signal, the first indication information, and the second indication information to the third UE instead of to the network device. FIG. 20 is a schematic diagram showing a flow chart of a signal transmission method provided by an exemplary embodiment of the present application. The method is performed by the first UE shown in FIG. 11 , and the method includes at least some of the following steps: Step 1210a: When an LBT failure occurs in the first shared frequency domain resource, the first signal is not sent to the second UE. For related content, please refer to step 440a, which will not be repeated here. In some embodiments, the physical layer of the first UE also indicates the LBT failure to the MAC layer. In some embodiments, when the first UE is within the coverage of the network and the MAC layer triggers a continuous LBT failure, the first UE reports the continuous LBT failure associated with the first signal to the network device, and / or expects the reconfiguration of the first signal. For details, please refer to the relevant content described in the previous "2. New Radio Unlicensed (NR-U) spectrum uplink LBT failure detection and recovery mechanism". Step 1210b: When an LBT failure occurs in the first shared frequency domain resource, a first signal is sent to the second UE in the second shared frequency domain resource. For related content, please refer to step 440b, which will not be repeated here. In some embodiments, the first UE sends a first signal to the second UE in the shared frequency domain resources where LBT succeeds (ie, the second shared frequency domain resources), and does not send the first signal in the shared frequency domain resources where LBT fails, i.e., the shared frequency domain resources where LBT fails are muted. In some embodiments, the physical layer of the first UE also indicates the LBT failure to the MAC layer. In some embodiments, when the first UE is within the network coverage and the MAC layer triggers a continuous LBT failure, the first UE reports the continuous LBT failure associated with the first signal to the network device. For details, please refer to the relevant content described in "5. SL-U continuous uplink LBT failure detection and recovery mechanism" above. In some embodiments, the first UE sends a MAC CE or UCI to the network device, and the MAC CE or UCI indicates a silence pattern and / or a non-silence pattern to the network device in the form of a bitmap. In some embodiments, the first UE sends a MAC CE or UCI to the network device, which carries information indicating shared frequency domain resources that failed LBT, and / or unexpected shared frequency domain resources, and / or unoccupied shared frequency domain resources. In some embodiments, the first UE sends a MAC CE or UCI to the network device, which carries information indicating shared frequency domain resources for successful LBT, and / or expected shared frequency domain resources, and / or occupied shared frequency domain resources. In some embodiments, in case of persistent LBT failure, the first UE starts a first timer. In some embodiments, during the activation of the first timer, the first UE stops sending the first signal; and / or after the first timer expires, the first UE resumes sending the first signal. In some embodiments, before executing step 1210a or 1210b, the first UE sends first capability information to the network device, and the first capability information is used to indicate whether the first UE supports sending the first signal on discontinuous and / or incomplete shared frequency domain resources. For related content, please refer to step 410 and step 910, which will not be repeated here. In some embodiments, the first UE sends the first capability information to the network device when it is within the network coverage. Exemplarily, after the first UE sends the first capability information to the network device within the network coverage, it moves out of the network coverage and executes step 1210a or step 1210b. In some embodiments, before executing step 1210a or 1210b, the first UE receives first configuration information from the network device, and the first configuration information is used to configure parameters for the first UE to send the first signal in the shared frequency domain resource. For related content, please refer to step 420, step 520, and step 920, which will not be repeated here. In some embodiments, the first UE receives the first configuration information from the network device when it is within the network coverage. Exemplarily, after receiving the first configuration information from the network device within the network coverage, the first UE moves out of the network coverage and executes step 1210a or step 1210b. In some embodiments, the first UE sends first indication information and / or second indication information to the second UE. In some embodiments, the first UE sends the first indication information and / or the second indication information to the third UE. For the relevant contents of the first indication information and the second indication information, please refer to the embodiment shown in FIG. 12 , step 1320 , and step 1330 , which will not be described in detail here. In summary, the method provided in the embodiment of the present application enables the first UE to perform actions related to the first signal in accordance with its own capabilities and / or the configuration of the network equipment when an LBT failure occurs in the side-by-side shared frequency domain resources, thereby ensuring the quality and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent by the first UE is large and the LBT failure problem faced is more serious, the method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, improves the transmission quality of the first signal, and meets the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. In addition, the introduction of the third UE enables the first UE to perform actions related to the first signal in a timely manner even in the OOC scenario, thereby ensuring the transmission delay of the first signal and expanding the application scenarios of the signal transmission method provided in the present application. FIG. 21 shows a schematic flow chart of a signal transmission method provided by an exemplary embodiment of the present application, the method being executed by the second UE, The second UE may be implemented as a terminal device as shown in FIG. 9 or FIG. 10 , and the method includes at least some of the following steps: Step 1310: Receive and / or measure a first signal sent by a first UE. For related content, please refer to step 1030, which will not be repeated here. In some embodiments, the second UE receives and / or measures the first signal based on one or more of the first capability information, the first configuration information, the second capability information, and the second configuration information. In some embodiments, the reception and / or measurement of the first signal is not performed based on the first capability information, the first configuration information, the second capability information, and the second configuration information. In some embodiments, before executing step 1310, the second UE sends second capability information to the network device, and the second capability information is used to indicate whether the second UE supports receiving and / or measuring the first signal in discontinuous and / or incomplete shared frequency domain resources. For related content, please refer to step 430 and step 1010, which will not be repeated here. In some embodiments, the second UE sends the second capability information to the network device when the second UE is within the network coverage. In some embodiments, before executing step 1310, the second UE receives second configuration information from the network device, and the second configuration information is used to configure the second UE to receive and / or measure parameters of the first signal in the shared frequency domain resource. For related content, please refer to step 420 and step 1020, which will not be repeated here. In some embodiments, the second UE receives the second configuration information from the network device when the second UE is within the network coverage. Step 1320: Receive first indication information sent by the first UE. For related content, please refer to step 1040, which will not be repeated here. Step 1330: Receive second indication information sent by the first UE. For related content, please refer to step 1050, which will not be repeated here. Step 1340: Send the measurement result of the first signal. In some embodiments, the second UE sends the measurement result of the first signal to the third UE. The third UE aggregates, calculates, and processes the measurement result of the first signal to determine the positioning result and / or the perception result. The third UE may play a role similar to that of a network device and / or a core network element. In some embodiments, the second UE also sends the first indication information and / or the second indication information to the third UE. The first indication information helps the third UE to know whether the first signal and the transmission resource of the first signal are complete and continuous, and whether the measurement result of the first signal meets the accuracy and resolution requirements; or, whether the measurement result of the first signal is available; or, whether the third UE adopts a reasonable calculation method to reduce the negative impact of incomplete and discontinuous transmission resources. The first indication information helps to ensure the accuracy of positioning results and perception results. The second indication information helps the third UE to clarify one or more of the following information: whether the first UE faces LBT failure, whether the first UE faces continuous LBT failure, the shared frequency domain resources where the LBT failure occurs, and the shared frequency domain resources expected by the first UE. The second indication information helps to ensure the accuracy of the positioning results and the perception results. It should be noted that step 1310, step 1320, step 1340, step 1350, and step 1360 are optional steps. Each of the above steps may be implemented separately, for example, step 1310 may be implemented separately as a capability reporting method, or step 1320 may be implemented separately as a configuration method, or step 1340 may be implemented separately as an information indication method, or step 1350 may be implemented separately as an information indication method, or step 1360 may be implemented separately as a measurement reporting method. The above steps can be freely combined, for example, step 1310 and step 1320 are combined to implement a configuration method, or step 1310 and step 1330 are combined to implement a measurement method, or step 1320 and step 1330 are combined to implement a measurement method, or step 1310, step 1320, and step 1330 are combined to implement a measurement method, or step 1340 and step 1350 are combined to implement an information indication method, or step 1330, step 1340, and step 1350 are combined to implement a measurement method, or step 1310, step 1320, step 1330, step 1340, and step 1350 are combined to implement a measurement method, or step 1330 and step 1360 are combined to implement a measurement reporting method, or step 1330, step 1340, step 1350, and step 1360 are combined to implement a measurement method, and the like. In summary, the method provided in the embodiment of the present application enables, in the event of an LBT failure in the side-link shared frequency domain resources, the behavior related to the first signal performed by the first UE to comply with the first UE's own capabilities and / or the second UE's capabilities and / or the configuration of the network equipment, thereby ensuring the quality and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent by the first UE is large and the LBT failure problem faced is more serious, the method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, thereby improving the transmission quality of the first signal to meet the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. In the event of an LBT failure in the side-link shared frequency domain resources, the communication transmission, positioning services, and perception services on the side-link shared frequency domain resources are guaranteed. In addition, it supports the exchange of indication information related to the first signal and the transmission resources of the first signal between the second UE and the third UE, which helps to ensure the accuracy of the positioning results and perception results when the first signal is incomplete or the transmission resources of the first signal are incomplete or discontinuous. Moreover, the introduction of the third UE enables the first UE to promptly execute actions related to the first signal even in the OOC scenario, thereby ensuring the transmission delay of the first signal and expanding the application scenarios of the signal transmission method provided in the present application. The behavior of the third UE side corresponding to the embodiments shown in Figures 20 and 21 can refer to the relevant content in "9. SL positioning" above. In short, the third UE receives the measurement result of the first signal and obtains the positioning result and / or perception result related to the first signal. (2) The first UE and the second UE transmit signals without the help of other UEs FIG. 22 is a schematic flow chart of a signal transmission method provided by an exemplary embodiment of the present application, the method is performed by the first UE shown in FIG. 11 , and the method includes at least some of the following steps: Step 1410: Send first capability information to the second UE, where the first capability information is used to indicate whether the first UE supports or does not support sending a first signal on discontinuous shared frequency domain resources. For the relevant content of the first capability information, please refer to step 410 and step 910, which will not be repeated here. In some embodiments, the first capability information is sent by the first UE via SL unicast. In some embodiments, the first capability information is carried in the request information and sent. In some embodiments, the first capability information is carried in a UECapabilityEnquirySidelink message. Step 1420: Receive second capability information sent by the second UE, where the second capability information is used to indicate whether the second UE supports receiving and / or measuring the first signal in discontinuous shared frequency domain resources. For the relevant content of the second capability information, please refer to step 430 and step 1010, which will not be repeated here. In some embodiments, the second capability information is sent by the second UE via SL unicast. In some embodiments, the second capability information is carried in a response message and sent. Alternatively, the second capability information sent by the second UE is used to respond to the first capability information sent by the first UE. In some embodiments, the second capability information is carried in a UECapabilityInformationSidelink message. Step 1430a: When an LBT failure occurs in the first shared frequency domain resource, the first signal is not sent to the second UE. For related content, please refer to step 440a, which will not be repeated here. In some embodiments, based on the first capability information and / or the second capability information, when an LBT failure occurs in the first shared frequency domain resource, the first UE does not send the first signal to the second UE. In some embodiments, when the first capability information and the second capability information are not satisfied, the first UE does not send the first signal to the second UE. In some embodiments, the physical layer of the first UE also indicates the LBT failure to the MAC layer. When the MAC layer triggers a persistent LBT failure, the first UE reports the persistent LBT failure associated with the first signal to the network device and / or the second UE and / or the third UE. For details, please refer to the relevant content described in "5. SL-U persistent uplink LBT failure detection and recovery mechanism" above. Step 1430b: When an LBT failure occurs in the first shared frequency domain resource, a first signal is sent to the second UE in the second shared frequency domain resource. For related content, please refer to step 440b, which will not be repeated here. In some embodiments, based on the first capability information and / or the second capability information, when an LBT failure occurs in the first shared frequency domain resource, the first UE sends a first signal to the second UE in the second shared frequency domain resource. In some embodiments, the first UE sends a first signal to the second UE in the shared frequency domain resources where LBT succeeds (ie, the second shared frequency domain resources), and does not send the first signal in the shared frequency domain resources where LBT fails, i.e., the shared frequency domain resources where LBT fails are muted. In some embodiments, the physical layer of the first UE also indicates the LBT failure to the MAC layer. When the MAC layer triggers a persistent LBT failure, the first UE reports the persistent LBT failure associated with the first signal to the network device and / or the second UE and / or the third UE. For details, please refer to the relevant content described in "5. SL-U persistent uplink LBT failure detection and recovery mechanism" above. In some embodiments, the first UE sends a MAC CE or SCI to the second UE, and the MAC CE or SCI indicates a mute pattern and / or a non-mute pattern to the second UE in the form of a bitmap. In some embodiments, the first UE sends a MAC CE or SCI to the second UE, which carries information indicating shared frequency domain resources that failed LBT, and / or unexpected shared frequency domain resources, and / or unoccupied shared frequency domain resources. In some embodiments, the first UE sends a MAC CE or SCI to the second UE, which carries information indicating shared frequency domain resources for successful LBT, and / or expected shared frequency domain resources, and / or occupied shared frequency domain resources. In some embodiments, the first UE sends first indication information and / or second indication information to the second UE. For the relevant contents of the first indication information and the second indication information, please refer to the embodiment shown in FIG. 12 , step 1540 , and step 1550 , which will not be described in detail here. In some embodiments, in case of persistent LBT failure, the first UE starts a first timer. In some embodiments, during the activation of the first timer, the first UE stops sending the first signal; and / or after the first timer expires, the first UE resumes sending the first signal. Each of the above steps may be implemented separately, for example, step 1410 may be implemented separately as a capability reporting method, or step 1420 may be implemented separately as a configuration method, or step 1430a may be implemented separately as a signal transmission method, or step 1430b may be implemented separately as a signal transmission method. The above steps can be freely combined, for example, step 1410 and step 1420 are combined to implement a configuration method, or step 1410 and step 1430a are combined to implement a signal transmission method, or step 1420 and step 1430a are combined to implement a signal transmission method, or step 1410, step 1420 and step 1430a are combined to implement a signal transmission method, or step 1410, step 1420 and step 1430a are combined to implement a signal transmission method. Step 1420 and step 1430a are combined to be implemented as a signal transmission method, or step 1410, step 1420, and step 1430b are combined to be implemented as a signal transmission method, etc. In summary, the method provided in the embodiment of the present application enables the first UE to perform actions related to the first signal in accordance with the capabilities of the first UE and / or the second UE in the event of an LBT failure in the side-by-side shared frequency domain resources, thereby ensuring the quality and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent by the first UE is large and the LBT failure problem faced is more serious, the method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, thereby improving the transmission quality of the first signal to meet the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. Moreover, even if the first UE and the second UE are both outside the network coverage, the first signal can be directly transmitted between the two, thereby ensuring the delay of the first signal and supporting the timely acquisition of positioning results and / or perception results. FIG. 23 is a schematic flow chart of a signal transmission method provided by an exemplary embodiment of the present application. The method is performed by a second UE. The second UE may be implemented as a terminal device as shown in FIG. 9 or FIG. 10. The method includes at least some of the following steps: Step 1510: Receive first capability information sent by a first UE, where the first capability information is used to indicate whether the first UE supports or does not support sending a first signal on discontinuous shared frequency domain resources. For the relevant content of the first capability information, please refer to step 410 and step 910, which will not be repeated here. In some embodiments, the first capability information is sent by the first UE via SL unicast. In some embodiments, the first capability information is carried in the request information and sent. In some embodiments, the first capability information is carried in a UECapabilityEnquirySidelink message. Step 1520: Send second capability information to the first UE, where the second capability information is used to indicate whether the second UE supports receiving and / or measuring the first signal in discontinuous shared frequency domain resources. For the relevant content of the second capability information, please refer to step 430 and step 1010, which will not be repeated here. In some embodiments, the second capability information is sent by the second UE via SL unicast. In some embodiments, the second capability information is carried in a response message and sent. Alternatively, the second capability information sent by the second UE is used to respond to the first capability information sent by the first UE. In some embodiments, the second capability information is carried in a UECapabilityInformationSidelink message. Step 1530: Receive and / or measure a first signal sent by a first UE. For related content, please refer to step 1030, which will not be repeated here. In some embodiments, the second UE receives and / or measures the first signal based on the first capability information and / or the second capability information. For the reception and measurement of the first signal, please refer to the relevant content in "9. SL positioning" above. In short, the second UE can measure the first signal based on one or more of the first capability information, the first configuration information, the first indication information, and the second indication information, and obtain the measurement quantity related to the positioning service and / or the perception service, and the measurement quantity includes at least one of the following: departure angle, arrival angle, distance, distance difference, signal quality of the first signal, delay, moving speed, phase, etc. The signal quality of the first signal may be represented by at least one of the following: RSRP value, RSSI value, RSRQ value, SINR value, CLI value, and CSI value. In the present application, perception can be equivalent to or replaced by at least one of the following: positioning, ranging, speed measurement, angle measurement, target imaging, target detection, target tracking, and target recognition. In some embodiments, the second UE determines a positioning result and / or a perception result based on a measurement result of the first signal. Step 1540: Receive first indication information sent by the first UE. For related content, please refer to step 1040, which will not be repeated here. Step 1550: Receive second indication information sent by the first UE. For related content, please refer to step 1050, which will not be repeated here. It should be noted that step 1510, step 1520, step 1540, and step 1550 are optional steps. Each of the above steps may be implemented separately, for example, step 1510 may be implemented separately as a capability reporting method, or step 1520 may be implemented separately as a configuration method, or step 1540 may be implemented separately as an information indication method, or step 1550 may be implemented separately as an information indication method. The above steps can be freely combined, for example, step 1510 and step 1520 are combined to implement a configuration method, or step 1510 and step 1530 are combined to implement a measurement method, or step 1520 and step 1530 are combined to implement a measurement method, or step 1510, step 1520, and step 1530 are combined to implement a measurement method, or step 1540 and step 1550 are combined to implement an information indication method, or step 1530, step 1540, and step 1550 are combined to implement a measurement method, or step 1510, step 1520, step 1530, step 1540, and step 1550 are combined to implement a measurement method, etc. In summary, the method provided in the embodiment of the present application ensures that, in the event of an LBT failure in the side-by-side shared frequency domain resources, the behavior related to the first signal performed by the first UE complies with the capabilities of the first UE and / or the second UE, thereby ensuring the quality and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent by the first UE is large and the LBT failure problem is more serious, the method provided in the embodiment of the present application helps to provide a transmission solution for signal transmission with large bandwidth requirements, thereby improving the transmission quality of the first signal. The amount can meet the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. Moreover, even if the first UE and the second UE are both out of network coverage, the first signal can be directly transmitted between the two, which ensures the delay of the first signal and supports timely acquisition of positioning results and / or perception results. 3. The receiver of the first signal is the second UE, and the first UE and the second UE are in a PC scenario In this case, among the first UE and the second UE, at least one UE is within the network coverage, and at least one UE is outside the network coverage. If the positioning result and / or the perception result is determined by the core network element, that is, the second UE is within the network coverage, the behavior of the first UE may refer to the embodiment shown in FIG17, the behavior of the second UE may refer to the embodiment shown in FIG18, and the behavior of the network device may refer to the embodiment shown in FIG19. The second UE sends one or more of the measurement result of the first signal, the first indication information, and the second indication information to the network device and / or the core network element. If the positioning result and / or the perception result is determined by the third UE, that is, the second UE is out of network coverage, the behavior of the first UE may refer to the embodiment shown in FIG. 20, and the behavior of the second UE may refer to the embodiment shown in FIG. 21. The second UE sends one or more of the measurement result of the first signal, the first indication information, and the second indication information to the third UE. Optionally, the first UE sends the first indication information and / or the second indication information to the third UE. FIG24 shows a block diagram of a signal transmission device provided by an exemplary embodiment of the present application, and the device can be implemented as a first UE as shown in FIG11 or FIG12 or FIG15 or FIG17 or FIG20 or FIG22, or implemented as a part of a first UE as shown in FIG11 or FIG12 or FIG15 or FIG17 or FIG20 or FIG22. The first UE can be a terminal device as shown in FIG9 or FIG10. The device includes a sending module 2410. Optionally, the device also includes a receiving module 2430 and / or a processing module 2450. The sending module 2410 is configured to, when an LBT failure occurs in the first shared frequency domain resource, not send the first signal, or send the first signal in the second shared frequency domain resource; The first shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy, and the second shared frequency domain resources are the shared frequency domain resources in which LBT succeeds in the first shared frequency domain resources. In some embodiments, the sending module 2410 is further used to, based on first information, not send the first signal when an LBT failure occurs in the first shared frequency domain resource; wherein the first information is related to shared spectrum access. In some embodiments, the sending module 2410 is further configured to send the first signal in the second shared frequency domain resource based on the first information when an LBT failure occurs in the first shared frequency domain resource; The first information is related to shared spectrum access. In some embodiments, the first information includes at least one of the following information: first capability information of the device; first configuration information for configuring parameters of the device for sending a first signal in a shared frequency domain resource; and second capability information of a second UE. In some embodiments, the sending module 2410 is further used to not send the first signal on the shared frequency domain resource where an LBT failure occurs in the first shared frequency domain resource. In some embodiments, the sending module 2410 is further used to indicate LBT failure to the medium access control MAC layer. In some embodiments, the apparatus further comprises a receiving module 2430 for receiving a reconfiguration of the first signal. In some embodiments, the device further includes a processing module 2450, and the sending module 2410 and / or the processing module 2450 is used to start the RRC reconstruction process. In some embodiments, the sending module 2410 is also used to perform at least one of the following steps: indicating the shared frequency domain resources where LBT fails to the network device; indicating the shared frequency domain resources where LBT succeeds to the network device; indicating the desired shared frequency domain resources to the network device; indicating the undesired shared frequency domain resources to the network device; indicating the occupied shared frequency domain resources to the network device; indicating the unoccupied shared frequency domain resources to the network device; indicating the shared frequency domain resources where LBT fails to other UEs; indicating the shared frequency domain resources where LBT succeeds to other UEs; indicating the desired shared frequency domain resources to other UEs; indicating the undesired shared frequency domain resources to other UEs; indicating the occupied shared frequency domain resources to other UEs; indicating the unoccupied shared frequency domain resources to other UEs; wherein the other UEs include UEs other than the device. In some embodiments, the sending module 2410 is further used to send first capability information to a network device or other UE, where the first capability information is used to indicate whether the device supports sending a first signal on discontinuous and / or incomplete shared frequency domain resources. In some embodiments, the first capability information is also used to indicate at least one of the following: the maximum number of segments of the second shared frequency domain resources supported by the device; the minimum bandwidth of the second shared frequency domain resources supported by the device; the minimum number of the second shared frequency domain resources supported by the device; the minimum value of the first ratio supported by the device, the first ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the first shared frequency domain resources; the minimum value of the second ratio supported by the device, the second ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the shared frequency domain resources where LBT failure occurs. In some embodiments, the first capability information is capability information at a frequency band level, or the first capability information is capability information at a UE level. In some embodiments, the receiving module 2430 is also used to receive first configuration information sent by a network device or a third UE, wherein the first configuration information is used to configure parameters for the device to send a first signal in a shared frequency domain resource; wherein the third UE belongs to other UEs. In some embodiments, the first configuration information is used to indicate at least one of the following: the device is not allowed to send an incomplete first signal; the device is allowed to send an incomplete first signal; the device is not allowed to send a first signal on discontinuous shared frequency domain resources; the device is allowed to send a first signal on discontinuous shared frequency domain resources; the device is allowed to send an incomplete first signal on continuous shared frequency domain resources; the device is allowed to send an incomplete first signal on discontinuous shared frequency domain resources; the device is not allowed to send a first signal on incomplete shared frequency domain resources; the device is allowed to send a first signal on incomplete shared frequency domain resources; the device is allowed to send an incomplete first signal on complete shared frequency domain resources; the device is allowed to send an incomplete first signal on incomplete shared frequency domain resources. In some embodiments, the first configuration information is used to instruct the device to send the first signal on the second shared frequency domain resources. In some embodiments, the first configuration information is used to instruct the device to send the first signal in the second shared frequency domain resources when a first condition is met; wherein the first condition is related to one or more of business requirements, resource requirements of the first signal, and accuracy requirements of the first signal. In some embodiments, the first condition includes at least one of the following: a first ratio is greater than a first threshold, the first ratio being the ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the first shared frequency domain resource; a second ratio is greater than a second threshold, the second ratio being the ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the shared frequency domain resource in which LBT failure occurs; the number of the second shared frequency domain resources is greater than a third threshold; the bandwidth of the second shared frequency domain resources is greater than a fourth threshold; the maximum number of segments of the second shared frequency domain resources is greater than a fifth threshold. In some embodiments, the first configuration information includes at least one of the following parameters: time domain resources of the first signal; frequency domain resources of the first signal; resource type of the first signal; comb tooth size of the first signal; sequence identifier of the first signal; power control parameters of the first signal; and spatial relationship information of the first signal. In some embodiments, the receiving module 2430 is further used to: receive second capability information sent by a second UE. In some embodiments, the second capability information is used to indicate at least one of the following: whether the second UE supports receiving the first signal in discontinuous shared frequency domain resources; whether the second UE supports measuring the first signal in discontinuous shared frequency domain resources; whether the second UE supports receiving the first signal in incomplete shared frequency domain resources; whether the second UE supports measuring the first signal in incomplete shared frequency domain resources. In some embodiments, the second capability information is used to indicate at least one of the following: the second UE supports receiving an incomplete first signal; the second UE does not support receiving an incomplete first signal; the second UE supports measuring an incomplete first signal; the second UE does not support measuring an incomplete first signal; the second UE supports receiving the first signal in incomplete shared frequency domain resources; the second UE does not support receiving the first signal in incomplete shared frequency domain resources; the second UE supports measuring the first signal in incomplete shared frequency domain resources; the second UE does not support measuring the first signal in incomplete shared frequency domain resources; the second UE supports receiving the first signal in discontinuous shared frequency domain resources; the second UE does not support receiving the first signal in discontinuous shared frequency domain resources; the second UE supports measuring the first signal in discontinuous shared frequency domain resources; the second UE does not support measuring the first signal in discontinuous shared frequency domain resources. In some embodiments, the second capability information includes at least one of the following parameters: the maximum number of segments of the second shared frequency domain resources supported by the second UE; the minimum bandwidth of the second shared frequency domain resources supported by the second UE; the minimum number of the second shared frequency domain resources supported by the second UE; the minimum value of a first ratio supported by the second UE, the first ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the first shared frequency domain resources; the minimum value of a second ratio supported by the second UE, the second ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the shared frequency domain resources where LBT failure occurs. In some embodiments, the second capability information is capability information at a frequency band level, or the second capability information is capability information at a UE level. In some embodiments, the sending module 2410 is further configured to indicate a continuous LBT failure to the network device in the event of a continuous LBT failure; In some embodiments, the sending module 2410 is further used to indicate the continued LBT failure to other UEs in the event of a continued LBT failure, wherein the other UEs include UEs other than the device. In some embodiments, the processing module 2450 is further configured to start a first timer. In some embodiments, the sending module 2410 is further configured to stop sending the first signal during the start-up of the first timer. In some embodiments, the sending module 2410 is further configured to resume sending the first signal after the first timer times out. In some embodiments, the continuous LBT failure situation is determined based on a second timer and a LBT failure number threshold. In some embodiments, the first signal includes at least one of the following: PRS; perception signal; SL-PRS; SRS; DMRS; synchronization signal; TRS; CSI-RS. In some embodiments, the shared frequency domain resources include at least one of the following: shared frequency domain resources of the NR system; shared frequency domain resources of the SL. In summary, the device provided in the embodiment of the present application supports not sending the first signal when LBT fails in the shared frequency domain resources, or sending the first signal in the shared frequency domain resources where LBT succeeds, providing feasible signal transmission for the situation where LBT occurs in the shared frequency domain resources. The scheme guarantees the quality, latency and efficiency of communication services and non-communication services on the shared spectrum. In particular, when the bandwidth of the first signal to be sent is large, the LBT failure problem will be more serious. The method provided in the embodiment of the present application helps to provide a transmission scheme for signal transmission with large bandwidth requirements, and provides a feasible solution for using shared spectrum to realize high-precision positioning services and perception services. In addition, it also supports information related to interactively sharing spectrum access, so that the first signal sent is more in line with the capabilities of the device itself, and / or the configuration of the network device, and / or the capabilities / expectations of the receiver of the first signal. The introduction of the first information improves the transmission quality of the first signal and ensures the accuracy and resolution requirements of the positioning results and perception results obtained based on the first signal. FIG25 shows a block diagram of a signal transmission device provided by an exemplary embodiment of the present application, and the device can be implemented as a network device as shown in FIG13, FIG16, or FIG19, or implemented as a part of a network device as shown in FIG13, FIG16, or FIG19. The network device can be a network device as shown in FIG9 or FIG10. The device includes a sending module 2510. Optionally, the device also includes a receiving module 2530 and / or a processing module 2550. The sending module 2510 is used to send first configuration information to the first UE, where the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource. In some embodiments, the device also includes a receiving module 2530, which is used to receive first capability information sent by the first UE, where the first capability information is used to indicate whether the first UE supports sending the first signal on discontinuous and / or incomplete shared frequency domain resources. In some embodiments, the first capability information is also used to indicate at least one of the following: the maximum number of segments of the second shared frequency domain resources supported by the first UE; the minimum bandwidth width of the second shared frequency domain resources supported by the first UE; the minimum number of second shared frequency domain resources supported by the first UE; the minimum ratio of the second shared frequency domain resources supported by the first UE to the first shared frequency domain resources; the minimum ratio of the second shared frequency domain resources supported by the first UE to the shared frequency domain resources in which LBT fails; wherein the second shared frequency domain resources are the shared frequency domain resources in which LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy. In some embodiments, the first capability information is capability information at a frequency band level, or the first capability information is capability information at a UE level. In some embodiments, the receiving module 2530 is also used for at least one of the following: receiving information from the first UE on shared frequency domain resources indicating LBT failure; receiving information from the first UE on shared frequency domain resources indicating LBT success; receiving information from the first UE on desired shared frequency domain resources; receiving information from the first UE on unexpected shared frequency domain resources; receiving information from the first UE on occupied shared frequency domain resources; receiving information from the first UE on unoccupied shared frequency domain resources. In some embodiments, the first configuration information is used to indicate at least one of the following: not allowing the first UE to send an incomplete first signal; allowing the first UE to send an incomplete first signal; not allowing the first UE to send a first signal on discontinuous shared frequency domain resources; allowing the first UE to send a first signal on discontinuous shared frequency domain resources; allowing the first UE to send an incomplete first signal on continuous shared frequency domain resources; allowing the first UE to send an incomplete first signal on discontinuous shared frequency domain resources; not allowing the first UE to send a first signal on incomplete shared frequency domain resources; allowing the first UE to send a first signal on incomplete shared frequency domain resources; allowing the first UE to send an incomplete first signal on complete shared frequency domain resources; allowing the first UE to send an incomplete first signal on incomplete shared frequency domain resources. In some embodiments, the first configuration information is used to instruct the first UE to send a first signal on a second shared frequency domain resource; wherein the second shared frequency domain resource is a shared frequency domain resource where LBT succeeds in the first shared frequency domain resource, and the first shared frequency domain resource includes the shared frequency domain resource that the first signal needs to occupy. In some embodiments, the first configuration information is used to instruct the first UE to send the first signal on the second shared frequency domain resources when a first condition is met; wherein the first condition is related to one or more of service requirements, resource requirements of the first signal, and accuracy requirements of the first signal. In some embodiments, the first condition includes at least one of the following: a first ratio is greater than a first threshold, the first ratio being the ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the first shared frequency domain resource; a second ratio is greater than a second threshold, the second ratio being the ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the shared frequency domain resource in which LBT failure occurs; the number of the second shared frequency domain resources is greater than a third threshold; the bandwidth of the second shared frequency domain resources is greater than a fourth threshold; the maximum number of segments of the second shared frequency domain resources is greater than a fifth threshold. In some embodiments, the first configuration information includes at least one of the following parameters: time domain resources of the first signal; frequency domain resources of the first signal; resource type of the first signal; comb tooth size of the first signal; sequence identifier of the first signal; power control parameters of the first signal; and spatial relationship information of the first signal. In some embodiments, the receiving module 2530 is further used to receive information sent by the first UE to indicate LBT failure and / or continuous LBT failure. In some embodiments, the receiving module 2530 is further used to receive a first signal sent by the first UE in a second shared frequency domain resource, where the first signal is sent when an LBT failure occurs in the first shared frequency domain resource; wherein the second shared frequency domain resource is The shared frequency domain resources in which LBT succeeds in the first shared frequency domain resources, wherein the first shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy. In some embodiments, the apparatus further includes a processing module 2550 for measuring a first signal sent by the first UE in the second shared frequency domain resource, where the first signal is sent when an LBT failure occurs in the first shared frequency domain resource. In some embodiments, the receiving module 2530 is further used to receive second capability information sent by a second UE. In some embodiments, the second capability information is used to indicate at least one of the following: whether the second UE supports receiving the first signal in discontinuous shared frequency domain resources; whether the second UE supports measuring the first signal in discontinuous shared frequency domain resources; whether the second UE supports receiving the first signal in incomplete shared frequency domain resources; whether the second UE supports measuring the first signal in incomplete shared frequency domain resources. In some embodiments, the second capability information is used to indicate at least one of the following: the second UE supports receiving an incomplete first signal; the second UE does not support receiving an incomplete first signal; the second UE supports measuring an incomplete first signal; the second UE does not support measuring an incomplete first signal; the second UE supports receiving the first signal in incomplete shared frequency domain resources; the second UE does not support receiving the first signal in incomplete shared frequency domain resources; the second UE supports measuring the first signal in incomplete shared frequency domain resources; the second UE does not support measuring the first signal in incomplete shared frequency domain resources; the second UE supports receiving the first signal in discontinuous shared frequency domain resources; the second UE does not support receiving the first signal in discontinuous shared frequency domain resources; the second UE supports measuring the first signal in discontinuous shared frequency domain resources; the second UE does not support measuring the first signal in discontinuous shared frequency domain resources. In some embodiments, the second capability information includes at least one of the following parameters: the maximum number of segments of the second shared frequency domain resources supported by the second UE; the minimum bandwidth of the second shared frequency domain resources supported by the second UE; the minimum number of second shared frequency domain resources supported by the second UE; the minimum value of the first ratio supported by the second UE, the first ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the first shared frequency domain resources; the minimum value of the second ratio supported by the second UE, the second ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the shared frequency domain resources where LBT fails; wherein the second shared frequency domain resources are the shared frequency domain resources in which LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy. In some embodiments, the sending module 2510 is further used to send second configuration information to the second UE, where the second configuration information is used to configure the second UE to receive and / or measure parameters of the first signal in the shared frequency domain resources. In some embodiments, the second configuration information includes at least one of the following information: time domain resources of the first signal; frequency domain resources of the first signal; resource type of the first signal; comb tooth size of the first signal; sequence identifier of the first signal; power control parameters of the first signal; spatial relationship information of the first signal; measurement quantity configuration of the second UE; and reporting configuration of the second UE. In some embodiments, the processing module 2550 is further used to obtain a measurement result of the first signal, where the first signal is sent by the first UE in the shared frequency domain resources. In some embodiments, the receiving module 2530 is further used to receive a measurement result of the first signal, where the first signal is sent by the first UE in the shared frequency domain resources. In some embodiments, the measurement result of the first signal is determined by the device, or by the second UE. In some embodiments, the receiving module 2530 is also used to receive first indication information, wherein the first indication information is used to indicate that the measurement result of the first signal is determined based on incomplete shared frequency domain resources, and / or based on discontinuous shared frequency domain resources, and / or based on an incomplete first signal. In some embodiments, the receiving module 2530 is further used to receive second indication information, where the second indication information is used to indicate the shared frequency domain resources occupied by the first signal and / or the shared frequency domain resources not occupied by the first signal. In some embodiments, the first signal includes at least one of the following: PRS; perception signal; SL-PRS; SRS; DMRS; synchronization signal; TRS; CSI-RS. In some embodiments, the shared frequency domain resources include at least one of the following: shared frequency domain resources of the NR system; shared frequency domain resources of the SL. In summary, the device provided in the embodiment of the present application affects the transmission behavior of the first UE on the shared frequency domain resources through the first configuration information. In particular, in the case of LBT failure in the shared frequency domain resources, the first configuration information provides a feasible solution for the reliable transmission of the first signal to ensure the delay of the first signal. Alternatively, in the case of LBT failure in the shared frequency domain resources, the first configuration information limits the transmission of the first signal to ensure resource utilization, positioning accuracy, perception accuracy, etc. The design of the first configuration information enables the device to configure different first signal sending behaviors for first UEs with different capabilities when encountering LBT failure on one or more RB-sets based on the capabilities of the first UE. A first UE with better capabilities can still send the first signal on time even if it encounters LBT failure on one or more RB-sets to ensure the transmission delay of the first signal and the delay when the first signal is used to meet communication requirements, and / or positioning requirements, and / or perception requirements. The design of the first condition enables the first signal to be not sent to save overhead when the bandwidth / number available for sending the first signal is lower than the threshold. FIG. 26 shows a structural block diagram of a signal transmission device provided by an exemplary embodiment of the present application. The device can be implemented as shown in FIG. 14 Or the second UE shown in FIG. 18 or FIG. 21 or FIG. 23, or is implemented as a part of the second UE shown in FIG. 14 or FIG. 18 or FIG. 21 or FIG. 23. The second UE may be a terminal device as shown in FIG. 9 or FIG. 10. The apparatus includes a receiving module 2610 and / or a processing module 2630. Optionally, the apparatus also includes a sending module 2650. A receiving module 2610 and / or a processing module 2630, wherein the receiving module 2610 is used to receive a first signal sent by the first UE in the second shared frequency domain resource, and the processing module 2630 is used to measure the first signal sent by the first UE in the second shared frequency domain resource, where the first signal is sent by the first UE when an LBT failure occurs in the first shared frequency domain resource; The second shared frequency domain resources are shared frequency domain resources where LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include shared frequency domain resources that the first signal needs to occupy. In some embodiments, the apparatus further comprises a sending module 2650 for sending second capability information. In some embodiments, the second capability information is used to indicate at least one of the following: whether the device supports receiving a first signal in discontinuous shared frequency domain resources; whether the device supports measuring a first signal in discontinuous shared frequency domain resources; whether the device supports receiving a first signal in incomplete shared frequency domain resources; whether the device supports measuring a first signal in incomplete shared frequency domain resources. In some embodiments, the second capability information is used to indicate at least one of the following: the device supports receiving an incomplete first signal; the device does not support receiving an incomplete first signal; the device supports measuring an incomplete first signal; the device does not support measuring an incomplete first signal; the device supports receiving a first signal in incomplete shared frequency domain resources; the device does not support receiving a first signal in incomplete shared frequency domain resources; the device supports measuring a first signal in incomplete shared frequency domain resources; the device does not support measuring a first signal in incomplete shared frequency domain resources; the device supports receiving a first signal in discontinuous shared frequency domain resources; the device does not support receiving a first signal in discontinuous shared frequency domain resources; the device supports measuring a first signal in discontinuous shared frequency domain resources; the device does not support measuring a first signal in discontinuous shared frequency domain resources. In some embodiments, the second capability information includes at least one of the following parameters: the maximum number of segments of the second shared frequency domain resources supported by the device; the minimum bandwidth of the second shared frequency domain resources supported by the device; the minimum number of the second shared frequency domain resources supported by the device; the minimum value of the first ratio supported by the device, the first ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the first shared frequency domain resources; the minimum value of the second ratio supported by the device, the second ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the shared frequency domain resources where LBT failure occurs. In some embodiments, the second capability information is capability information at a frequency band level, or the second capability information is capability information at a UE level. In some embodiments, the receiving module 2610 is further used to receive second configuration information, where the second configuration information is used to configure the device to receive and / or measure parameters of the first signal in a shared frequency domain resource. In some embodiments, the second configuration information includes at least one of the following information: time domain resources of the first signal; frequency domain resources of the first signal; resource type of the first signal; comb tooth size of the first signal; sequence identifier of the first signal; power control parameters of the first signal; spatial relationship information of the first signal; measurement quantity configuration of the device; and reporting configuration of the device. In some embodiments, the receiving module 2610 is further used to receive first capability information sent by the first UE, where the first capability information is used to indicate whether the first UE supports sending the first signal on discontinuous and / or incomplete shared frequency domain resources. In some embodiments, the first capability information is also used to indicate at least one of the following: the maximum number of segments of the second shared frequency domain resources supported by the first UE; the minimum bandwidth of the second shared frequency domain resources supported by the first UE; the minimum number of the second shared frequency domain resources supported by the first UE; the minimum value of a first ratio supported by the first UE, the first ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the first shared frequency domain resources; the minimum value of a second ratio supported by the first UE, the second ratio being the ratio of the bandwidth of the second shared frequency domain resources to the bandwidth of the shared frequency domain resources where LBT failure occurs. In some embodiments, the receiving module 2610 is also used to perform at least one of the following steps: receiving information from the first UE on shared frequency domain resources indicating LBT failure; receiving information from the first UE on shared frequency domain resources indicating LBT success; receiving information from the first UE on desired shared frequency domain resources; receiving information from the first UE on unexpected shared frequency domain resources; receiving information from the first UE on occupied shared frequency domain resources; receiving information from the first UE on unoccupied shared frequency domain resources. In some embodiments, the receiving module 2610 is further used to receive information sent by the first UE to indicate LBT failure and / or continuous LBT failure. In some embodiments, the sending module 2650 is further used to send the measurement result of the first signal to a network device or a third UE. In some embodiments, the sending module 2650 is also used to send first indication information to the network device or the third UE, and the first indication information is used to indicate that the measurement result is determined based on incomplete shared frequency domain resources, and / or based on discontinuous shared frequency domain resources, and / or based on an incomplete first signal. In some embodiments, the sending module 2650 is further used to send second indication information to the network device or the third UE, where the second indication information is used to indicate the shared frequency domain resources occupied by the first signal and / or the shared frequency domain resources not occupied by the first signal. and / or, shared frequency domain resources where LBT fails, and / or, shared frequency domain resources where LBT succeeds. In some embodiments, the first signal includes at least one of the following: PRS; perception signal; SL-PRS; SRS; DMRS; synchronization signal; TRS; CSI-RS. In some embodiments, the shared frequency domain resources include at least one of the following: shared frequency domain resources of the NR system; shared frequency domain resources of the SL. In summary, the device provided in the embodiment of the present application supports receiving a first signal sent by a first UE when an LBT failure occurs in a first shared frequency domain resource, and supports obtaining one or more of data information, positioning results, perception results, etc. by measuring the first signal. In the event of an LBT failure in a shared frequency domain resource, communication services and non-communication services in the SL-U frequency band are still supported, and in particular, the use of side-by-side shared frequency domain resources can be ensured to meet positioning requirements and perception requirements. In addition, it supports interacting with the first UE through capability information so that the first signal is more in line with the capabilities of the first UE and / or the capabilities of the device. FIG27 shows a schematic diagram of the structure of a communication device 2700 provided by an exemplary embodiment of the present application, including: a processor 2701, a receiver 2702, a transmitter 2703, a memory 2704, and at least one of a bus 2705. The communication device 2700 may be used to execute at least part of the steps executed by the first UE shown in FIG11 or FIG12 or FIG15 or FIG17 or FIG20 or FIG22, or may be used to execute at least part of the steps executed by the network device shown in FIG13 or FIG16 or FIG19, or may be used to execute at least part of the steps executed by the second UE shown in FIG14 or FIG18 or FIG21 or FIG23. The processor 2701 includes one or more processing cores, and the processor 2701 executes various functional applications and information processing by running software programs and modules. In some embodiments, the processor 2701 can be used to implement the functions and steps of the above-mentioned processing module 2450 and / or processing module 2550 and / or processing module 2630. The receiver 2702 and the transmitter 2703 may be implemented as a communication component, which may be a communication chip, and the communication component may be referred to as a transceiver. In some embodiments, the receiver 2702 may be used to implement the functions and steps of the above-mentioned receiving module 2430 and / or receiving module 2530 and / or receiving module 2610, and the transmitter 2703 may be used to implement the functions and steps of the above-mentioned sending module 2410 and / or sending module 2510 and / or sending module 2650. In some embodiments, the receiver 2702 includes a backscatter transmitter. The memory 2704 is connected to the processor 2701 via a bus 2705 . The memory 2704 may be used to store at least one instruction, and the processor 2701 may be used to execute the at least one instruction to implement each step in the above method embodiment. In addition, memory 2704 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. Volatile or non-volatile storage devices include but are not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, and programmable read-only memory (PROM). In some embodiments, the receiver 2702 receives signals / data independently, or the processor 2701 controls the receiver 2702 to receive signals / data, or the processor 2701 requests the receiver 2702 to receive signals / data, or the processor 2701 cooperates with the receiver 2702 to receive signals / data. In some embodiments, the transmitter 2703 independently sends signals / data, or the processor 2701 controls the transmitter 2703 to send signals / data, or the processor 2701 requests the transmitter 2703 to send signals / data, or the processor 2701 cooperates with the transmitter 2703 to send signals / data. In an exemplary embodiment of the present application, a computer-readable storage medium is further provided, wherein at least one program is stored in the computer-readable storage medium, and the at least one program is loaded and executed by the processor to implement the signal transmission method provided by the above-mentioned various method embodiments. In an exemplary embodiment of the present application, a chip is also provided, which includes a programmable logic circuit and / or program instructions. When the chip runs on a communication device, it is used to implement the signal transmission methods provided by the above-mentioned various method embodiments. In an exemplary embodiment of the present application, a computer program product is further provided. When the computer program product is executed on a processor of a computer device, the computer device executes the above signal transmission method. In an exemplary embodiment of the present application, a computer program is further provided. The computer program includes computer instructions. A processor of a computer device executes the computer instructions, so that the computer device executes the above-mentioned signal transmission method. A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc. The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A signal transmission method, characterized in that: The method is performed by a first terminal device UE, and the method includes: In the case where a listen-before-talk (LBT) failure occurs in the first shared frequency domain resource, not sending the first signal, or sending the first signal in the second shared frequency domain resource; The first shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy, and the second shared frequency domain resources are the shared frequency domain resources in which LBT succeeds in the first shared frequency domain resources.

2. The method according to claim 1, characterized in that The step of not sending the first signal when an LBT failure occurs in the first shared frequency domain resource includes: Based on the first information, in a case where an LBT failure occurs in the first shared frequency domain resource, not sending the first signal; The first information is related to shared spectrum access.

3. The method according to claim 1, characterized in that When an LBT failure occurs in the first shared frequency domain resource, sending the first signal in the second shared frequency domain resource includes: Based on the first information, in case an LBT failure occurs in the first shared frequency domain resource, sending the first signal in the second shared frequency domain resource; The first information is related to shared spectrum access.

4. The method according to claim 2 or 3, characterized in that: The first information includes at least one of the following information: first capability information of the first UE, where the first capability information is used to indicate whether the first UE supports sending the first signal on discontinuous and / or incomplete shared frequency domain resources; first configuration information, used to configure parameters for the first UE to send a first signal in a shared frequency domain resource, where the parameters are related to a transmission behavior of the first UE when an LBT failure occurs in the first shared frequency domain resource; Second capability information of the second UE, where the second capability information is used to indicate whether the second UE supports receiving and / or measuring the first signal on discontinuous and / or incomplete shared frequency domain resources.

5. The method according to claim 4, characterized in that In the case where an LBT failure occurs in the first shared frequency domain resource, not sending the first signal includes at least one of the following: When the first capability information indicates that the first UE does not support sending the first signal on discontinuous and / or incomplete shared frequency domain resources, and when an LBT failure occurs in the first shared frequency domain resources, not sending the first signal; Based on the parameters configured by the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, not sending the first signal; When the second capability information indicates that the second UE does not support receiving the first signal on discontinuous and / or incomplete shared frequency domain resources, and when an LBT failure occurs in the first shared frequency domain resources, the first signal is not sent; When the second capability information indicates that the second UE does not support measuring the first signal on discontinuous and / or incomplete shared frequency domain resources, and when an LBT failure occurs in the first shared frequency domain resources, the first signal is not sent.

6. The method according to claim 4, characterized in that When an LBT failure occurs in the first shared frequency domain resource, sending the first signal in the second shared frequency domain resource includes at least one of the following: When the first capability information indicates that the first UE supports sending the first signal on discontinuous and / or incomplete shared frequency domain resources, and when an LBT failure occurs in the first shared frequency domain resources, sending the first signal on the second shared frequency domain resources; Based on the parameters configured by the first configuration information, when an LBT failure occurs in the first shared frequency domain resource, sending the first signal in the second shared frequency domain resource; When the second capability information indicates that the second UE supports receiving the first signal on discontinuous and / or incomplete shared frequency domain resources, and when an LBT failure occurs in the first shared frequency domain resources, sending the first signal on the second shared frequency domain resources; The second capability information indicates that the second UE supports measuring the first signal on discontinuous and / or incomplete shared frequency domain resources, and, in the event that an LBT failure occurs in the first shared frequency domain resources, the first signal is sent on the second shared frequency domain resources.

7. The method according to any one of claims 1 to 5, characterized in that: The step of not sending the first signal when an LBT failure occurs in the first shared frequency domain resource includes: The first signal is not sent on the shared frequency domain resource where the LBT failure occurs in the first shared frequency domain resource.

8. The method according to any one of claims 1 to 7, characterized in that: In the case where an LBT failure occurs in the first shared frequency domain resource, the method further includes at least one of the following: Indicate LBT failure to the medium access control MAC layer; receiving a reconfiguration of the first signal; Start the RRC re-establishment process.

9. The method according to any one of claims 1 to 8, characterized in that: The method further comprises at least one of the following: Indicate to the network device the shared frequency domain resources where LBT failed; Indicate to the network device the shared frequency domain resources of the LBT success; indicating a desired shared frequency domain resource to a network device; indicating to a network device an undesired shared frequency domain resource; indicating to the network device the occupied shared frequency domain resources; indicating to the network device the unoccupied shared frequency domain resources; Indicate to other UEs the shared frequency domain resources where LBT failed; Indicate to other UEs the shared frequency domain resources of successful LBT; Indicating desired shared frequency domain resources to other UEs; Indicating undesired shared frequency domain resources to other UEs; Indicate the occupied shared frequency domain resources to other UEs; Indicating unoccupied shared frequency domain resources to other UEs; The other UEs include UEs other than the first UE.

10. The method according to any one of claims 1 to 9, characterized in that: The method further comprises: First capability information is sent to a network device or other UE, where the first capability information is used to indicate whether the first UE supports sending a first signal on discontinuous and / or incomplete shared frequency domain resources.

11. The method according to claim 10, characterized in that The first capability information is further used to indicate at least one of the following: a maximum number of segments of the second shared frequency domain resource supported by the first UE; A minimum bandwidth of the second shared frequency domain resource supported by the first UE; a minimum number of the second shared frequency domain resources supported by the first UE; a minimum value of a first ratio supported by the first UE, where the first ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the first shared frequency domain resource; The minimum value of the second ratio supported by the first UE, where the second ratio is the ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the shared frequency domain resource where the LBT failure occurs.

12. The method according to claim 10 or 11, characterized in that: The first capability information is capability information at a frequency band level, or the first capability information is capability information at a UE level.

13. The method according to any one of claims 1 to 12, characterized in that: The method further comprises: Receive first configuration information sent by a network device or a third UE, where the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource, and the parameters are related to a transmission behavior of the first UE when an LBT failure occurs in the first shared frequency domain resource; The third UE belongs to other UEs.

14. The method according to claim 13, characterized in that The first configuration information is used to indicate at least one of the following: not allowing the first UE to send an incomplete first signal; allowing the first UE to send an incomplete first signal; Not allowing the first UE to send a first signal on discontinuous shared frequency domain resources; Allowing the first UE to send a first signal on discontinuous shared frequency domain resources; Allowing the first UE to send an incomplete first signal on continuous shared frequency domain resources; Allowing the first UE to send an incomplete first signal on discontinuous shared frequency domain resources; not allowing the first UE to send a first signal on an incomplete shared frequency domain resource; Allowing the first UE to send a first signal on an incomplete shared frequency domain resource; Allowing the first UE to send an incomplete first signal on a complete shared frequency domain resource; The first UE is allowed to send an incomplete first signal on incomplete shared frequency domain resources.

15. The method according to claim 13 or 14, characterized in that The first configuration information is used to instruct the first UE to send the first signal in the second shared frequency domain resources.

16. The method according to claim 15, characterized in that The first configuration information is used to instruct the first UE to send the first signal in the second shared frequency domain resources when a first condition is met; The first condition is related to one or more of business requirements, resource requirements of the first signal, and accuracy requirements of the first signal.

17. The method according to claim 16, characterized in that The first condition includes at least one of the following: The first ratio is greater than a first threshold, and the first ratio is the ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the first shared frequency domain resource. Width ratio; The second ratio is greater than a second threshold, where the second ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the shared frequency domain resource where the LBT failure occurs; The number of the second shared frequency domain resources is greater than a third threshold; The bandwidth of the second shared frequency domain resource is greater than a fourth threshold; The maximum number of segments of the second shared frequency domain resource is greater than a fifth threshold.

18. The method according to any one of claims 13 to 17, characterized in that: The first configuration information includes at least one of the following parameters: time domain resources of the first signal; frequency domain resources of the first signal; a resource type of the first signal; a comb tooth size of the first signal; a sequence identifier of the first signal; a power control parameter of the first signal; The spatial relationship information of the first signal.

19. The method according to any one of claims 1 to 18, characterized in that: The method further comprises: receiving second capability information sent by a second UE, where the second capability information is used to indicate at least one of the following: whether the second UE supports receiving the first signal in discontinuous shared frequency domain resources; whether the second UE supports measuring the first signal in discontinuous shared frequency domain resources; whether the second UE supports receiving the first signal in an incomplete shared frequency domain resource; Whether the second UE supports measuring the first signal in incomplete shared frequency domain resources.

20. The method according to claim 19, characterized in that The second capability information is used to indicate at least one of the following: The second UE supports receiving an incomplete first signal; The second UE does not support receiving an incomplete first signal; The second UE supports measuring an incomplete first signal; The second UE does not support measuring the incomplete first signal; The second UE supports receiving the first signal in an incomplete shared frequency domain resource; The second UE does not support receiving the first signal in an incomplete shared frequency domain resource; The second UE supports measuring the first signal in an incomplete shared frequency domain resource; The second UE does not support measuring the first signal in an incomplete shared frequency domain resource; The second UE supports receiving the first signal in discontinuous shared frequency domain resources; The second UE does not support receiving the first signal in discontinuous shared frequency domain resources; The second UE supports measuring the first signal in discontinuous shared frequency domain resources; The second UE does not support measuring the first signal in discontinuous shared frequency domain resources.

21. The method according to claim 19 or 20, characterized in that The second capability information includes at least one of the following parameters: a maximum number of segments of the second shared frequency domain resource supported by the second UE; A minimum bandwidth of the second shared frequency domain resource supported by the second UE; a minimum number of the second shared frequency domain resources supported by the second UE; a minimum value of a first ratio supported by the second UE, where the first ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the first shared frequency domain resource; The minimum value of the second ratio supported by the second UE, where the second ratio is the ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the shared frequency domain resource where the LBT failure occurs.

22. The method according to any one of claims 19 to 21, characterized in that: The second capability information is capability information at a frequency band level, or the second capability information is capability information at a UE level.

23. The method according to any one of claims 1 to 22, characterized in that: In the event of a persistent LBT failure, the method further comprises at least one of the following: Indicates persistent LBT failures to network devices; Indicating a persistent LBT failure to other UEs, the other UEs comprising UEs other than the first UE; Start the first timer.

24. The method according to claim 23, characterized in that The method further comprises at least one of the following: During the start of the first timer, stop sending the first signal; After the first timer times out, the sending of the first signal is resumed.

25. The method according to claim 23 or 24, characterized in that The continuous LBT failure situation is determined based on the second timer and the LBT failure number threshold.

26. The method according to any one of claims 1 to 25, characterized in that: The first signal includes at least one of the following: Positioning reference signal PRS; Perception signals; Sidelink positioning reference signal SL-PRS; Sounding reference signal SRS; Demodulation reference signal DMRS; Synchronous signal; Tracking reference signal TRS; Channel State Information Reference Signal CSI-RS.

27. The method according to any one of claims 1 to 26, characterized in that: The shared frequency domain resource includes at least one of the following: Shared frequency domain resources of the new radio NR system; Shared frequency domain resources of the sidelink SL.

28. A signal transmission method, characterized in that: The method is performed by a network device, and the method includes: First configuration information is sent to a first terminal device UE, where the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource, and the parameters are related to the transmission behavior of the first UE when an LBT failure occurs in the first shared frequency domain resource.

29. The method according to claim 28, characterized in that The method further comprises: Receive first capability information sent by the first UE, where the first capability information is used to indicate whether the first UE supports sending the first signal on discontinuous and / or incomplete shared frequency domain resources.

30. The method according to claim 29, characterized in that The first capability information is further used to indicate at least one of the following: A maximum number of segments of the second shared frequency domain resource supported by the first UE; A minimum bandwidth width of the second shared frequency domain resource supported by the first UE; a minimum number of second shared frequency domain resources supported by the first UE; a minimum ratio of the second shared frequency domain resources to the first shared frequency domain resources supported by the first UE; a minimum ratio of the second shared frequency domain resources supported by the first UE to the shared frequency domain resources in which the LBT failure occurs; The second shared frequency domain resources are the shared frequency domain resources where LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy.

31. The method according to claim 29 or 30, characterized in that The first capability information is capability information at a frequency band level, or the first capability information is capability information at a UE level.

32. The method according to any one of claims 28 to 31, characterized in that The method further comprises at least one of the following: Receiving information on shared frequency domain resources indicating a listen-before-talk (LBT) failure from the first UE; Receiving information about shared frequency domain resources indicating successful LBT from the first UE; receiving information indicating desired shared frequency domain resources from the first UE; receiving information indicating undesired shared frequency domain resources from the first UE; receiving information indicating occupied shared frequency domain resources from the first UE; Receive information from the first UE indicating unoccupied shared frequency domain resources.

33. The method according to any one of claims 28 to 32, characterized in that: The first configuration information is used to indicate at least one of the following: not allowing the first UE to send an incomplete first signal; allowing the first UE to send an incomplete first signal; Not allowing the first UE to send a first signal on discontinuous shared frequency domain resources; Allowing the first UE to send a first signal on discontinuous shared frequency domain resources; Allowing the first UE to send an incomplete first signal on continuous shared frequency domain resources; Allowing the first UE to send an incomplete first signal on discontinuous shared frequency domain resources; not allowing the first UE to send a first signal on an incomplete shared frequency domain resource; Allowing the first UE to send a first signal on an incomplete shared frequency domain resource; Allowing the first UE to send an incomplete first signal on a complete shared frequency domain resource; The first UE is allowed to send an incomplete first signal on incomplete shared frequency domain resources.

34. The method according to any one of claims 28 to 33, characterized in that The first configuration information is used to instruct the first UE to send a first signal on a second shared frequency domain resource; The second shared frequency domain resource is a shared frequency domain resource in which the listen-before-speak (LBT) is successful in the first shared frequency domain resource. The shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy.

35. The method according to claim 34, characterized in that The first configuration information is used to instruct the first UE to send the first signal on the second shared frequency domain resources when a first condition is met; The first condition is related to one or more of business requirements, resource requirements of the first signal, and accuracy requirements of the first signal.

36. The method according to claim 35, characterized in that The first condition includes at least one of the following: The first ratio is greater than a first threshold, and the first ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the first shared frequency domain resource; The second ratio is greater than a second threshold, where the second ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the shared frequency domain resource where the LBT failure occurs; The number of the second shared frequency domain resources is greater than a third threshold; The bandwidth of the second shared frequency domain resource is greater than a fourth threshold; The maximum number of segments of the second shared frequency domain resource is greater than a fifth threshold.

37. The method according to any one of claims 28 to 36, characterized in that The first configuration information includes at least one of the following parameters: time domain resources of the first signal; frequency domain resources of the first signal; a resource type of the first signal; a comb tooth size of the first signal; a sequence identifier of the first signal; a power control parameter of the first signal; The spatial relationship information of the first signal.

38. The method according to any one of claims 28 to 37, characterized in that The method further comprises: Receive information sent by the first UE to indicate LBT failure and / or continuous LBT failure.

39. The method according to any one of claims 28 to 38, characterized in that: The method further comprises: Receiving and / or measuring a first signal sent by the first UE in a second shared frequency domain resource, where the first signal is sent when a listen-before-talk (LBT) failure occurs in the first shared frequency domain resource; The second shared frequency domain resources are shared frequency domain resources where LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include shared frequency domain resources that the first signal needs to occupy.

40. The method according to any one of claims 28 to 39, characterized in that: The method further comprises: receiving second capability information sent by a second UE, where the second capability information is used to indicate at least one of the following: whether the second UE supports receiving the first signal in discontinuous shared frequency domain resources; whether the second UE supports measuring the first signal in discontinuous shared frequency domain resources; whether the second UE supports receiving the first signal in an incomplete shared frequency domain resource; Whether the second UE supports measuring the first signal in incomplete shared frequency domain resources.

41. The method according to claim 40, characterized in that The second capability information is used to indicate at least one of the following: The second UE supports receiving an incomplete first signal; The second UE does not support receiving an incomplete first signal; The second UE supports measuring an incomplete first signal; The second UE does not support measuring the incomplete first signal; The second UE supports receiving the first signal in an incomplete shared frequency domain resource; The second UE does not support receiving the first signal in an incomplete shared frequency domain resource; The second UE supports measuring the first signal in an incomplete shared frequency domain resource; The second UE does not support measuring the first signal in an incomplete shared frequency domain resource; The second UE supports receiving the first signal in discontinuous shared frequency domain resources; The second UE does not support receiving the first signal in discontinuous shared frequency domain resources; The second UE supports measuring the first signal in discontinuous shared frequency domain resources; The second UE does not support measuring the first signal in discontinuous shared frequency domain resources.

42. The method according to claim 40 or 41, characterized in that The second capability information includes at least one of the following parameters: a maximum number of segments of the second shared frequency domain resource supported by the second UE; A minimum bandwidth of the second shared frequency domain resource supported by the second UE; a minimum number of second shared frequency domain resources supported by the second UE; a minimum value of a first ratio supported by the second UE, where the first ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the first shared frequency domain resource; a minimum value of a second ratio supported by the second UE, where the second ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the shared frequency domain resource in which the LBT failure occurs; The second shared frequency domain resources are shared frequency domain resources where LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include shared frequency domain resources that the first signal needs to occupy.

43. The method according to any one of claims 28 to 42, characterized in that The method further comprises: Second configuration information is sent to the second UE, where the second configuration information is used to configure the second UE to receive and / or measure parameters of the first signal in the shared frequency domain resources.

44. The method according to claim 43, characterized in that The second configuration information includes at least one of the following information: time domain resources of the first signal; frequency domain resources of the first signal; a resource type of the first signal; a comb tooth size of the first signal; a sequence identifier of the first signal; a power control parameter of the first signal; spatial relationship information of the first signal; A measurement quantity configuration of the second UE; The reporting configuration of the second UE.

45. The method according to any one of claims 28 to 44, characterized in that The method further comprises: Obtain a measurement result of the first signal, where the first signal is sent by the first UE in the shared frequency domain resources.

46. ​​The method according to claim 45, characterized in that The measurement result of the first signal is determined by the network device, or by the second UE.

47. The method according to claim 45 or 46, characterized in that The method further comprises: Receive first indication information, where the first indication information is used to indicate that a measurement result of the first signal is determined based on incomplete shared frequency domain resources, and / or based on discontinuous shared frequency domain resources, and / or based on an incomplete first signal.

48. The method according to any one of claims 45 to 47, characterized in that The method further comprises: Second indication information is received, where the second indication information is used to indicate shared frequency domain resources occupied by the first signal and / or shared frequency domain resources not occupied by the first signal.

49. The method according to any one of claims 28 to 48, characterized in that The first signal includes at least one of the following: Positioning reference signal PRS; Perception signals; Sidelink positioning reference signal SL-PRS; Sounding reference signal SRS; Demodulation reference signal DMRS; Synchronous signal; Tracking reference signal TRS; Channel State Information Reference Signal CSI-RS.

50. The method according to any one of claims 28 to 49, characterized in that The shared frequency domain resource includes at least one of the following: Shared frequency domain resources of the new radio NR system; Shared frequency domain resources of the sidelink SL.

51. A signal transmission method, characterized in that: The method is performed by a second terminal device UE or a network device, and the method includes: Receiving and / or measuring a first signal sent by a first UE in a second shared frequency domain resource, where the first signal is sent by the first UE when a listen-before-talk (LBT) failure occurs in the first shared frequency domain resource; The second shared frequency domain resources are shared frequency domain resources where LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include shared frequency domain resources that the first signal needs to occupy.

52. The method according to claim 51, characterized in that The method is performed by the second UE, and the method further includes: Sending second capability information, where the second capability information is used to indicate at least one of the following: whether the second UE supports receiving the first signal in discontinuous shared frequency domain resources; whether the second UE supports measuring the first signal in discontinuous shared frequency domain resources; whether the second UE supports receiving the first signal in an incomplete shared frequency domain resource; Whether the second UE supports measuring the first signal in incomplete shared frequency domain resources.

53. The method according to claim 52, characterized in that The second capability information is used to indicate at least one of the following: The second UE supports receiving an incomplete first signal; The second UE does not support receiving an incomplete first signal; The second UE supports measuring an incomplete first signal; The second UE does not support measuring the incomplete first signal; The second UE supports receiving the first signal in an incomplete shared frequency domain resource; The second UE does not support receiving the first signal in an incomplete shared frequency domain resource; The second UE supports measuring the first signal in an incomplete shared frequency domain resource; The second UE does not support measuring the first signal in an incomplete shared frequency domain resource; The second UE supports receiving the first signal in discontinuous shared frequency domain resources; The second UE does not support receiving the first signal in discontinuous shared frequency domain resources; The second UE supports measuring the first signal in discontinuous shared frequency domain resources; The second UE does not support measuring the first signal in discontinuous shared frequency domain resources.

54. The method according to claim 52 or 53, characterized in that The second capability information includes at least one of the following parameters: a maximum number of segments of the second shared frequency domain resource supported by the second UE; A minimum bandwidth of the second shared frequency domain resource supported by the second UE; a minimum number of the second shared frequency domain resources supported by the second UE; a minimum value of a first ratio supported by the second UE, where the first ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the first shared frequency domain resource; The minimum value of the second ratio supported by the second UE, where the second ratio is the ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the shared frequency domain resource where the LBT failure occurs.

55. The method according to any one of claims 52 to 54, characterized in that The second capability information is capability information at a frequency band level, or the second capability information is capability information at a UE level.

56. The method according to any one of claims 51 to 55, characterized in that The method is performed by the second UE, and the method further includes: Receive second configuration information, where the second configuration information is used to configure the second UE to receive and / or measure parameters of the first signal in shared frequency domain resources.

57. The method according to claim 56, characterized in that The second configuration information includes at least one of the following information: time domain resources of the first signal; frequency domain resources of the first signal; a resource type of the first signal; a comb tooth size of the first signal; a sequence identifier of the first signal; a power control parameter of the first signal; spatial relationship information of the first signal; A measurement quantity configuration of the second UE; The reporting configuration of the second UE.

58. The method according to any one of claims 51 to 57, characterized in that: The method further comprises: Receive first capability information sent by the first UE, where the first capability information is used to indicate whether the first UE supports sending the first signal on discontinuous and / or incomplete shared frequency domain resources.

59. The method according to claim 58, characterized in that The first capability information is further used to indicate at least one of the following: a maximum number of segments of the second shared frequency domain resource supported by the first UE; A minimum bandwidth of the second shared frequency domain resource supported by the first UE; a minimum number of the second shared frequency domain resources supported by the first UE; a minimum value of a first ratio supported by the first UE, where the first ratio is a ratio of a bandwidth of the second shared frequency domain resource to a bandwidth of the first shared frequency domain resource; The minimum value of the second ratio supported by the first UE, where the second ratio is the ratio of the bandwidth of the second shared frequency domain resource to the bandwidth of the shared frequency domain resource where the LBT failure occurs.

60. The method according to any one of claims 51 to 59, characterized in that: The method further comprises at least one of the following: Receiving information of shared frequency domain resources indicating LBT failure from the first UE; Receiving information about shared frequency domain resources indicating successful LBT from the first UE; receiving information indicating desired shared frequency domain resources from the first UE; receiving information indicating undesired shared frequency domain resources from the first UE; receiving information indicating occupied shared frequency domain resources from the first UE; Receive information from the first UE indicating unoccupied shared frequency domain resources.

61. The method according to any one of claims 51 to 60, characterized in that The method further comprises: Receive information sent by the first UE to indicate LBT failure and / or continuous LBT failure.

62. The method according to any one of claims 51 to 60, characterized in that The method is performed by the second UE, and the method further includes: Sending a measurement result of the first signal to a network device or a third UE.

63. The method according to claim 62, characterized in that The method further comprises: Sending first indication information to the network device or the third UE, wherein the first indication information is used to indicate that the measurement result is determined based on incomplete shared frequency domain resources, and / or based on discontinuous shared frequency domain resources, and / or based on an incomplete first signal.

64. The method according to claim 62 or 63, characterized in that The method further comprises: Sending second indication information to the network device or the third UE, wherein the second indication information is used to indicate the shared frequency domain resources occupied by the first signal, and / or the shared frequency domain resources not occupied by the first signal, and / or the shared frequency domain resources where LBT fails, and / or the shared frequency domain resources where LBT succeeds.

65. The method according to any one of claims 51 to 64, characterized in that The first signal includes at least one of the following: Positioning reference signal PRS; Perception signals; Sidelink positioning reference signal SL-PRS; Sounding reference signal SRS; Demodulation reference signal DMRS; Synchronous signal; Tracking reference signal TRS; Channel State Information Reference Signal CSI-RS.

66. The method according to any one of claims 51 to 65, characterized in that The shared frequency domain resource includes at least one of the following: Shared frequency domain resources of the new radio NR system; Shared frequency domain resources of the sidelink SL.

67. A signal transmission device, characterized in that: The device comprises: A sending module, configured to, when a listen-before-talk (LBT) failure occurs in a first shared frequency domain resource, not send a first signal, or send the first signal in a second shared frequency domain resource; The first shared frequency domain resources include the shared frequency domain resources that the first signal needs to occupy, and the second shared frequency domain resources are the shared frequency domain resources in which LBT succeeds in the first shared frequency domain resources.

68. A signal transmission device, characterized in that: The device comprises: A sending module is used to send first configuration information to a first terminal device UE, wherein the first configuration information is used to configure parameters for the first UE to send a first signal in a shared frequency domain resource, and the parameters are related to the transmission behavior of the first UE when an LBT failure occurs in the first shared frequency domain resource.

69. A signal transmission device, characterized in that: The device comprises: a receiving module and / or a processing module, the receiving module being used to receive a first signal sent by a first terminal device UE in a second shared frequency domain resource, the processing module being used to measure the first signal sent by the first UE in the second shared frequency domain resource, the first signal being sent by the first UE in the case of a listen-before-talk (LBT) failure in the first shared frequency domain resource; The second shared frequency domain resources are shared frequency domain resources where LBT succeeds in the first shared frequency domain resources, and the first shared frequency domain resources include shared frequency domain resources that the first signal needs to occupy.

70. A communication device, characterized in that: The communication device comprises: processor; a receiver and / or transmitter connected to the processor; a memory for storing executable instructions for the processor; Wherein, the communication device is used to implement the signal transmission method as described in any one of claims 1 to 27, or any one of claims 28 to 50, or any one of claims 51 to 66.

71. A computer-readable storage medium, characterized in that The readable storage medium stores executable instructions, which are loaded and executed by a processor to implement the signal transmission method as described in any one of claims 1 to 27, or any one of claims 28 to 50, or any one of claims 51 to 66.

72. A chip, characterized in that: The chip includes a programmable logic circuit or a program, and the chip is used to implement the signal transmission method as described in any one of claims 1 to 27, or any one of claims 28 to 50, or any one of claims 51 to 66.

73. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the signal transmission method as described in any one of claims 1 to 27, or any one of claims 28 to 50, or any one of claims 51 to 66.

74. A computer program, characterized in that The computer program includes computer instructions, and the processor of the computer device executes the computer instructions, so that the computer device performs the signal transmission method described in any one of claims 1 to 27, or any one of claims 28 to 50, or any one of claims 51 to 66.

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