Information transmission method and terminal equipment

Abstract

To provide an information transmission method and a terminal apparatus that improve the reliability of transmission between UE and UE corresponding to side link communication.SOLUTION: In a communication system, an information transmission method is applied to a first terminal apparatus. When a periodic reporting condition or a predetermined trigger condition is met in the case where side link transmission is performed between the first terminal apparatus and each of one or more second terminal apparatuses, the information transmission method causes auxiliary information that can be used by each second terminal apparatus to perform side link transmission to be transmitted to the one or more the second terminal apparatuses.SELECTED DRAWING: Figure 1

Description

Cross-reference to Related Applications

[0001] This invention claims the priority of a Chinese patent application with application number 202010231316.7 and title of invention "Information Transmission Method and Terminal Device", which was filed with the Chinese Patent Office on March 27, 2020, and all of it is incorporated herein by reference.

Technical Field

[0002] The present invention relates to the field of communications, and in particular, to an information transmission method and a terminal device.

Background Art

[0003] Currently, the Long Term Evolution (LTE) system supports Sidelink (SL) transmission (also called side link, secondary link or lateral link, etc.). As shown in FIG. 1, SL is used to directly transmit data between User Equipment (UE) without passing through a network device.

[0004] In some scenarios of SL communication, for example, (1) when the receiving (RX) UE and transmitting (TX) UE in a sidelink perform session communication in half-duplex mode, the RX UE cannot transmit or receive simultaneously due to the limitations of the half-duplex communication mode; (2) when the RX UE in a sidelink receives physical sidelink share channels (PSSCH) from multiple TX UEs and feeds back a physical sidelink feedback channel (PSFCH) through these multiple PSSCH transmissions, if the PSFCHs corresponding to different PSSCH transmissions fall on the same PSFCH occasion, the RX UE may not be able to transmit multiple PSFCHs simultaneously due to limitations in UE capabilities or power control. In these scenarios, the reliability of sidelink transmission may be reduced due to the limitations present in the scenario or the constraints of certain hardware conditions. [Overview of the project] [Problems that the invention aims to solve]

[0005] One of the technical problems that the embodiments of the present invention aim to solve is the low reliability of transmission between UEs corresponding to sidelink communication. [Means for solving the problem]

[0006] In a first aspect, embodiments of the present invention provide an information transmission method applied to a first terminal device, comprising the step of transmitting auxiliary information to at least one second terminal device when periodic reporting conditions or predetermined trigger conditions are met, wherein the auxiliary information is used by the at least one second terminal device to perform sidelink transmission.

[0007] In a second aspect, embodiments of the present invention provide a first terminal device comprising a transmission module for transmitting auxiliary information to at least one second terminal device when periodic reporting conditions or predetermined trigger conditions are met, wherein the auxiliary information is used by the at least one second terminal device for sidelink transmission.

[0008] In a third aspect, embodiments of the present invention provide an information transmission method applied to a second terminal device, which includes the step of receiving auxiliary information transmitted by a first terminal device when periodic reporting conditions or predetermined trigger conditions are met, and the auxiliary information is used for sidelink transmission.

[0009] In a fourth aspect, an embodiment of the present invention provides a second terminal device comprising a receiving module for receiving auxiliary information transmitted by a first terminal device when periodic reporting conditions or predetermined trigger conditions are met, wherein the auxiliary information is used for sidelink transmission.

[0010] In the fifth aspect, an embodiment of the present invention provides a terminal device comprising a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, the steps of the method described in the embodiment of the first aspect are realized, or when the computer program is executed by the processor, the steps of the method described in the embodiment of the third aspect are realized.

[0011] In the sixth aspect, embodiments of the present invention provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in the embodiment of the first aspect are realized, or when the computer program is executed by a processor, the steps of the method described in the embodiment of the third aspect are realized. [Effects of the Invention]

[0012] In embodiments of the present invention, when sidelink transmission is performed between a first terminal device and at least one second terminal device, the reliability of the sidelink transmission can be improved by transmitting auxiliary information that each second terminal device can use to perform sidelink transmission to the at least one second terminal device when the conditions for periodic reporting or predetermined trigger conditions are met. [Brief explanation of the drawing]

[0013] The drawings described herein are intended to further illustrate the present invention and to constitute a part of it, and the exemplary embodiments and descriptions thereof are for interpretation purposes only and are not intended to improperly limit the present invention. The drawings are described below. [Figure 1] This is a schematic diagram illustrating the procedure of an information transmission method according to an embodiment of the present invention. [Figure 2] This is a schematic diagram of a resource set instruction according to an embodiment of the present invention. [Figure 3] This is a schematic diagram of another resource set instruction according to an embodiment of the present invention. [Figure 4] This is a schematic diagram of one scenario in which a first terminal device according to an embodiment of the present invention spontaneously triggers the transmission of auxiliary information. [Figure 5] This is a schematic diagram of a second scenario in which a first terminal device according to an embodiment of the present invention spontaneously triggers the transmission of auxiliary information. [Figure 6] This is a schematic diagram of a third scenario in which the first terminal device according to an embodiment of the present invention spontaneously triggers the transmission of auxiliary information. [Figure 7] This is a schematic diagram illustrating the procedure of a second information transmission method according to an embodiment of the present invention. [Figure 8] This is a schematic diagram of the structure of a first terminal device according to an embodiment of the present invention. [Figure 9] This is a schematic diagram of the structure of a second terminal device according to an embodiment of the present invention. [Figure 10] This is a schematic diagram of the structure of a terminal device according to an embodiment of the present invention. [Modes for carrying out the invention]

[0014] In the following, the technical solutions in embodiments of the present invention will be clearly and completely described with reference to the drawings of the embodiments. Naturally, the embodiments described are only a part of the embodiments of the present invention, not all of them. All other embodiments that a person skilled in the art could obtain based on the embodiments of the present invention without requiring any creative effort are all within the scope of the protection of the present invention.

[0015] The technical solutions of the present invention can be applied to various communication systems, such as the Global System of Mobile communication (GSM), Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), Long Term Evolution / Long Term Evolution Advanced (LTE-A), and NR.

[0016] User equipment (UE), also known as mobile terminal or mobile user equipment, is capable of communicating with one or more core networks via a radio access network (RAN). User equipment may include mobile phones (also called "cellular" phones) and terminal equipment such as computers with terminal devices. For example, it may be a portable, handheld, computer-integrated, or in-vehicle mobile device that exchanges language and / or data with the radio access network.

[0017] The network device is also called a base station, which may be a Base Transceiver Station (BTS) in GSM or CDMA, a NodeB in WCDMA, or further an evolutional Node B (eNB or e-NodeB) in LTE and a gNB in 5G.

[0018] In the following, with reference to the drawings, the technical solutions provided in each embodiment of the present invention will be described in detail.

[0019] As shown in FIG. 1, an embodiment of the present invention provides an information transmission method executed by a first terminal device that performs sidelink transmission with each of at least one second terminal device, and the method includes the following process steps.

[0020] In step 101, when the condition of periodic reporting or a predetermined trigger condition is satisfied, auxiliary information is transmitted to at least one second terminal device, where the auxiliary information is used for at least one second terminal device to perform sidelink transmission.

[0021] In an embodiment of the present invention, when sidelink transmission is performed between the first terminal device and each of at least one second terminal device, when the condition of periodic reporting or a predetermined trigger condition is satisfied, by transmitting the auxiliary information that can be used for each second terminal device to perform sidelink transmission to the at least one second terminal device, the purpose of improving the reliability of sidelink transmission can be achieved.

[0022] It should be understood that the first terminal device can transmit the auxiliary information to one, a plurality, a set or a plurality of sets of second terminal devices. For example, it can be transmitted to the at least one second terminal device by reporting or broadcasting. The auxiliary information can be used for the at least one second terminal device to perform resource selection or parameter adjustment for sidelink transmission.

[0023] What needs to be explained is that if the second terminal device uses a Mode 2 resource allocation scheme, that is, if it uses a resource allocation scheme that the UE autonomously selects, resource selection conflicts may occur between different TX UEs, and the above auxiliary information can be used to partially resolve the resource conflict problem.

[0024] Selectively, in the information transmission method of the embodiment of the present invention, the auxiliary information includes, but is not limited to, at least one of a resource set instruction, a resource reselection instruction, a demodulation reference signal (DMRS) pattern instruction, a DMRS port number instruction, a DMRS port number instruction, a transmit power instruction, a modulation and coding scheme (MCS) instruction, a hybrid automatic repeat request (HARQ) feedback activation instruction, and a HARQ feedback type instruction.

[0025] It should be noted that the above auxiliary information must include at least a time-domain resource corresponding to the resource set, a frequency-domain resource corresponding to the resource set, and a resource set instruction for indicating at least one of several sub-resource sets divided in relation to the resource set. In this way, each second terminal device can assist in resource selection when performing sidelink transmission, thereby improving the reliability of transmission between UEs where sidelink transmission is performed. Furthermore, in addition to the resource set instruction, the above auxiliary information may further include at least one of the following: a resource reselection instruction, a DMRS pattern instruction, a DMRS port number instruction, a DMRS port number instruction, a transmit power instruction, an MCS instruction, a HARQ feedback activation instruction, and a HARQ feedback type instruction.

[0026] The first terminal device may, by DMRS pattern instruction, restrict at least one second terminal device to transmit high-density DMRS in order to reduce the complexity of channel estimation performed by the first terminal device, or it may restrict at least one second terminal device to transmit low-density DMRS in order to reduce overhead.

[0027] When a HARQ feedback type instruction is used to specify a HARQ feedback type to be broadcast, it includes, but is not limited to, two types of feedback forms: 1) all RX UEs share a PSFCH resource and the UEs only provide negative acknowledgments (NACKs); and 2) RX UEs occupy different PSFCH resources and the RX UEs provide either acknowledgments (ACKs) or NACKs on their respective resources. Selectively, in the information transmission method of the embodiment of the present invention, if the auxiliary information includes a resource set instruction, the resource set instruction includes at least one of a time-domain resource instruction and a frequency-domain resource instruction.

[0028] The above time-domain resource specification is used to specify at least one of the following for a time-domain resource within a resource set: period, offset, length, granularity, and resource specification method.

[0029] Selectively, the granularity of the above time-domain resource instruction may include, but is not limited to, at least one of slot(s), sub-slot(s), PSFCH occasion length, PSFCH period, or absolute time duration. The offset of the above time-domain resource instruction may include, but is not limited to, at least one of system frame number (SFN)#0, Direct Frame Number (DFN)#0, or the starting position of the resource pool. The above time-domain resource instruction method may be specified in a fine form such as period, offset, length, or granularity, and specifically, as shown in Figure 2, slot granularity is taken as an example. The time-domain resource instruction method may further be in the form of a bitmap, that is, it may specify, but is not limited to, the length of the bitmap, the starting position, and at least one of the time-domain granularity indicated by the bitmap in a simple and flexible form.

[0030] The above frequency domain resource specification is used to specify at least one of the following for a frequency domain resource within a resource set: offset, length, granularity, and resource specification method.

[0031] Selectively, the granularity of the above frequency domain resource instruction may include, but is not limited to, at least one of the following: physical resource block (PRB), subcarrier, resource pool length (pool length), subchannel, component carrier (CC), bandwidth (band), and absolute frequency domain width. The offset of the above frequency domain resource instruction may include, but is not limited to, at least one of the following: PRB0, common resource block (CRB)0, point A, pool start position, and bandwidth part (BWP) start position. The above frequency domain resource instruction method may be specified in a fine form such as offset, length, and granularity, specifically, as shown in Figure 2, subchannel granularity is taken as an example. The frequency domain resource instruction method may further be in the form of a bitmap, that is, it may specify, but is not limited to, the length of the bitmap, the start position, and at least one of the frequency domain granularity indicated by the bitmap in a simple and flexible form.

[0032] Selectively, the parameters for the above-mentioned time-domain resource instruction and frequency-domain resource instruction can be obtained by one of the following: pre-configuration, protocol specification, configuration by control nodes (e.g., configured by upper-layer signaling such as Radio Resource Control (RRC), PC5-RRC, PC5-S, etc.), dynamic instruction by control nodes (e.g., instructed by Downlink Control Information (DCI), Sidelink Control Information (SCI), Medium Access Control-Control Element (MAC CE), etc.), dynamic instruction by auxiliary nodes, or by predetermined rules.

[0033] Selectively, in the information transmission method of the embodiment of the present invention, if the auxiliary information includes a resource set instruction and the resource set is divided into a plurality of sub-resource sets, the resource set instruction includes a sub-resource set instruction.

[0034] A subresource set instruction is used to specify at least one of the following: time-domain granularity, frequency-domain granularity, time-domain start position, frequency-domain start position, time-domain length, frequency-domain length, time-domain period, frequency-domain period, and subresource set instruction method, corresponding to a subresource set. The time-domain length may refer to the number of subresource sets or the number of time domains of a subresource set, and the frequency-domain length may refer to the number of subresource sets or the number of frequency domains of a subresource set.

[0035] Selectively, the division of time-frequency resources in a sub-resource set can be achieved by one of the following: pre-configuration, protocol-based specification, configuration by a control node, dynamic instruction by a control node, or by predetermined rules.

[0036] Selectively, in the information transmission method of the embodiment of the present invention, resource instructions based on a subset may be made in the form of a bitmap. Bitmap encoding may be performed first in the time domain and then in the frequency domain, or first in the frequency domain and then in the time domain. As shown in Figure 3, if the resource set is divided into four sub-resource sets and the resources to be instructed are contained within sub-resource sets #1 and #4, the bitmap may be encoded as 1001 first in the time domain and then in the frequency domain, where 1 represents the inclusion of a resource and 0 represents the exclusion of a resource. Of course, in other embodiments of the present invention, 1 may represent the exclusion of a resource and 0 may represent the inclusion of a resource.

[0037] Selectively, in the information transmission method of the embodiment of the present invention, step 101 may be performed to transmit auxiliary information to at least one second terminal device when the conditions for periodic reporting are met. That is, the first terminal device may periodically and spontaneously transmit the auxiliary information to at least one second terminal device. Periodic reporting by the first terminal device can be realized by one of the following methods (1) to (3). (1) Pre-configuration. (2) Configuration using control nodes. The control node may include, for example, network equipment such as base stations, and terminal equipment having scheduling functions such as packet header UEs, relay UEs, and roadside units (RSUs) within a given UE packet. (3) Specified by protocol.

[0038] Furthermore, selectively, the period and / or resources for achieving periodic reporting of supplementary information may be determined by one of the above methods.

[0039] Selectively, in the information transmission method of the embodiment of the present invention, step 101 may also be performed to transmit auxiliary information to at least one second terminal device when a predetermined trigger condition is met. In other words, the first terminal device may be passively triggered to transmit the auxiliary information to at least one second terminal device, thereby avoiding unnecessary signaling overhead. It is possible to determine whether a predetermined trigger condition for transmitting auxiliary information has been met by a different method. The following specific embodiments are included, but are not limited to, a method for determining whether a trigger condition is met.

[0040] Specific Example 1 In this specific embodiment 1, upon receiving a first trigger signaling transmitted from the control node, it is determined that a predetermined trigger condition is met, and the first trigger signaling is used to instruct the first terminal device to transmit auxiliary information to at least one second terminal device. In other words, the transmission of auxiliary information may be triggered by the control node.

[0041] The first trigger signaling described above may be a physical layer signaling or a higher layer signaling, and may include, but is not limited to, DCI signaling, MAC CE signaling, or RRC signaling. Selectively, if the first trigger signaling is an RRC signaling, the RRC signaling may further be used to configure the transmission period of the auxiliary information so as to clarify when the auxiliary information is transmitted.

[0042] More selectively, the first trigger signaling includes a target instruction domain, which is used to instruct the first terminal device to transmit auxiliary information to at least one second terminal device. The target instruction domain may be a fixed domain in the first trigger signaling, for example, an independent domain in the first trigger signaling, or a domain that is jointly coded with other instruction domains.

[0043] If the first trigger signaling described above is a DCI signaling, the first trigger signaling may include one of the following (1) or (2). (1) DCI signaling using target downlink control information DCI format. In other words, the first trigger signaling may be a signaling having a new DCI format. (2) DCI signaling scrambled using the Radio Network Temporary Identifier (RNTI). In other words, the first trigger signaling may be DCI signaling scrambled using a specific RNTI.

[0044] Specific Example 2 In this specific embodiment 2, upon receiving a second trigger signaling transmitted from at least one second terminal device, it is determined that a predetermined trigger condition is met, and the second trigger signaling is used to instruct the first terminal device to transmit auxiliary information to at least one second terminal device. In other words, the transmission of auxiliary information may also be triggered by a terminal device that performs sidelink transmission with the first terminal device, thus avoiding unnecessary signaling overhead.

[0045] The second trigger signaling described above may be MAC CE signaling, SCI signaling, or RRC signaling. In the case of SCI signaling, it may be triggered, for example, by a specific domain or reuse domain in the 2nd stage SCI. In the case of RRC signaling, it may be triggered, for example, by the Sidelink link interface (also called the PC5 interface) RRC.

[0046] More selectively, based on the specific embodiment 2, the step of transmitting auxiliary information to at least one second terminal device may be performed to transmit the auxiliary information to at least one second terminal device within a target transmission period. Methods for determining the target transmission period include one of instruction by second trigger signaling, specification by protocol, configuration by a control node, and pre-configuration.

[0047] Furthermore, regarding the method triggered by the first terminal device and the terminal device performing sidelink transmission, it is understood that the period for transmitting the auxiliary information may be further limited in order to provide the corresponding auxiliary information to at least one second terminal device in a timely manner and to ensure the efficiency of sidelink transmission. Selectively, the above target transmission period may be within one or more time units after receiving the second trigger signaling, where the time unit may be, but is not limited to, at least one of slot(s), sub-slot(s), logical slot(s), logical sub-slot(s), PSFCH period, PSFCH occasion, or absolute time.

[0048] Selectively, in the information transmission method of the embodiment of the present invention, the second trigger signaling is transmitted by at least one second terminal device when at least one of the following conditions (1) to (3) is met. (1) At least one of NACK messages and / or discontinuous transmissions (DTX) is continuously detected. For example, if the number of detected NACK messages and / or DTX exceeds a threshold, auxiliary information can be transmitted, which may be a value defined by the protocol, a pre-configured value, or a value configured by the control node. (2) Before transmitting a transport block (TB) whose priority is higher than the priority threshold or whose quality of service (QoS) is higher than the QoS threshold. The priority threshold or QoS threshold may be pre-configured, defined by the protocol, or configured by the control node. The QoS threshold may include a reliability threshold or a latency threshold. (3) A first measurement with respect to a first terminal device is less than a first measurement threshold, where the first measurement includes at least one of a Reference Signal Received Power (RSRP) measurement and a distance measurement. The first measurement threshold may be pre-configured, defined by a protocol, or configured by a control node.

[0049] Selectively, the second trigger signaling is transmitted by at least one second terminal device at predetermined time intervals, and the predetermined time interval is smaller than a time interval threshold. In this way, it can be ensured that the first terminal device does not frequently receive trigger signaling initiated by the corresponding second terminal device for requesting auxiliary information, that is, it is undesirable for the frequency of trigger signaling transmitted by the second terminal device within a unit time to be too high.

[0050] The above frequency thresholds may be pre-configured, defined by a protocol, or configured by a control node. More selectively, the frequency thresholds may be associated with a target channel busy ratio (CBR) or target occupancy ratio (CR), that is, corresponding frequency thresholds may be configured separately for different CBR ranges or CR ranges.

[0051] Specific Example 3 In the specific embodiment 3, when a predetermined trigger condition is met, the first terminal device may determine whether the predetermined trigger condition is met before the step of transmitting auxiliary information to at least one second terminal device, and the predetermined trigger condition includes, but is not limited to, at least one of the following (1) to (5).

[0052] (1) A second measurement with each of at least one second terminal device is less than a second measurement threshold, where the second measurement includes at least one of the RSRP measurement and the distance measurement. The second measurement threshold may be pre-configured, defined by a protocol, or configured by a control node.

[0053] (2) Having at least one radio resource control RRC connection based on the PC5 interface. That is, a first terminal device can transmit auxiliary information to at least one second terminal device with which a PC5-RRC connection has been established, and as shown in Figure 4, if UE-A has established a PC5-RRC connection with UE-B and UE-C respectively, UE-A can transmit auxiliary information to UE-B and UE-C respectively.

[0054] Selectively, the first terminal device may transmit auxiliary information to at least one second terminal device with which a PC5-RRC connection has been established, including the case where the auxiliary information is transmitted to a second terminal device with which a PC5-RRC connection has been established for the first time. In other words, among the second terminal devices with which a PC5-RRC connection has been established with the first terminal device, some may be second terminal devices with which a connection has been established for the first time, while others may not be second terminal devices with which a connection has been established for the first time. In this case, the auxiliary information may be transmitted only to the second terminal device with which a PC5-RRC connection has been established for the first time, or the auxiliary information may be transmitted periodically to each second terminal device with which a PC5-RRC connection has been established, or the first terminal device may decide when to transmit the auxiliary information to each second terminal device.

[0055] (3) The number of occupied resources, the number of pre-occupied resources, or the number of reserved resources is greater than the resource threshold, and the resources may include time-domain resources and / or frequency-domain resources. In one example, as shown in Figure 5, UE-A is triggered to transmit auxiliary information to UE-B each time the number of occupied time-domain resources reaches a predetermined number (i.e., the resource threshold).

[0056] The resource threshold is the occupancy ratio within a time window, the length of which may be pre-configured, defined by a protocol, or configured by a control node. Auxiliary information may also be transmitted within one or more time units prior to the arrival of the time window.

[0057] (4) A collision in the hybrid automatic retransmission request HARQ feedback is detected. As shown in Figure 6, if UE-A detects that it has received PSSCH from UE-B and UE-C, and the PSFCHs corresponding to the PSSCHs of UE-B and UE-C fall under the same PSFCH occasion, but UE-A is unable to transmit multiple PSFCHs simultaneously due to limitations in its capabilities or transmit power, then the transmission of auxiliary information may be triggered.

[0058] (5) Resource collision is detected in physical sidelink shared channel PSSCH transmission.

[0059] Selectively, a determination is made based on the results of channel sounding to determine whether or not a resource collision has occurred. This includes, but is not limited to, the following two determination methods.

[0060] As Method 1, the first terminal device can determine whether or not there is a resource collision in the resources of the second terminal device based on the resource reservation signaling of the second terminal device.

[0061] In this method, the first terminal device receives resource reservation signaling transmitted from N second terminal devices and can determine whether or not there is a resource collision in the resources of the first target terminal device among the N second terminal devices based on the resource reservation signaling from the N second terminal devices, where N is 1 or greater.

[0062] moreover, The resource reservation signaling for the first target terminal device is subject to the condition that it includes duplicate resources. The condition is that the energy of the resource reservation signaling of the first target terminal device is higher than the first threshold. The condition is that the energy difference between the resource reservation signaling of the first target terminal device and the resource reservation signaling of the second target terminal device among the N second terminal devices is higher than the second threshold. A resource collision can be determined to exist in the resources of the first target terminal device if at least one of the following conditions is met: the energy ratio between the resource reservation signaling of the first target terminal device and the resource reservation signaling of the third target terminal device among the N second terminal devices is higher than the third threshold.

[0063] Any one of the first to third thresholds described above may be defined by the protocol, configured by the control node, or pre-configured. The energy may be expressed as parameters such as RSRP, Received Signal Strength Indication (RSSI), or Reference Signal Received Quality (RSRQ).

[0064] Method 2 involves determining whether or not there is a resource collision in the resources of the second terminal device based on the channel detection results (or brand detection results).

[0065] In this method, the first terminal device can determine whether or not there is a resource collision in the resources of the second terminal device based on the detection results on the first channel. The first channel may include a Physical Sidelink Control Channel (PSCCH) or PSSCH.

[0066] moreover, The condition that no control information or data information is detected on the first channel, The condition is that the energy of the first resource corresponding to the second terminal device on the first channel is higher than the fourth threshold. A resource collision can be determined to exist in the resource of the second terminal device if at least one of the following conditions is met: the signal-to-noise and interference ratio (SINR) or signal-to-noise ratio (SNR) of the second resource corresponding to the second terminal device on the first channel is detected to be higher than the fifth threshold.

[0067] Either the fourth or fifth threshold described above may be defined by the protocol, configured by the control node, or pre-configured. The energy described above may be expressed as parameters such as RSRP, RSSI, RSRQ, etc.

[0068] It should be noted that the receiving terminal may combine methods 1 and 2 above to determine whether or not there is a resource collision in the transmitting terminal's resources. To avoid redundancy, a detailed explanation is omitted here.

[0069] Furthermore, it is understood that the behavior of transmitting auxiliary information to at least one second terminal device may be performed by the first terminal device when it determines that the corresponding predetermined trigger condition is met.

[0070] In any of the above specific embodiments in which a predetermined trigger condition is met, step 101 may be specifically performed such that, when the predetermined trigger condition is met, auxiliary information is transmitted semi-continuously or aperiodicly to at least one second terminal device.

[0071] Furthermore, when the transmission of auxiliary information is triggered by predetermined trigger conditions, it is understood that the periodic transmission of the auxiliary information may be semi-persistent (SP) transmission.

[0072] Selectively, in the information transmission method of the embodiment of the present invention, step 101 may be specifically carried out to transmit auxiliary information to at least one second terminal device by first signaling. In other words, auxiliary information may be carried and transmitted to at least one second terminal device in the form of signaling.

[0073] The first signaling may be an RRC signaling, a DCI signaling, a PC5-RRC signaling, a MAC CE signaling, or an SCI signaling. Selectively, if the first signaling is an SL signaling (e.g., a PC5-RRC signaling or an SCI signaling), the first signaling may be transmitted by a standalone PSCCH or by a PSSCH or PSCCH corresponding to a subchannel or a subslot.

[0074] Furthermore, in order to enable the second terminal equipment to efficiently and accurately receive auxiliary information for enhancing the reliability of the sidelink transmission, the first signaling may also carry at least one of the following (1) to (4) in addition to the auxiliary information. (1) A method for issuing resource set instructions when auxiliary information includes resource set instructions. Furthermore, it is understood that the instruction domain in the signaling allows for specifying which instruction method to adopt when multiple resource set instruction methods are supported. (2) A signaling identifier for indicating that the first signaling is to be used for the transmission of auxiliary information. (3) Identifier (ID) of the first terminal device. (4) The ID of at least one second terminal device.

[0075] Selectively, an information transmission method in an embodiment of the present invention may include the step of transmitting a second signaling to at least one second terminal device, the second signaling being used to indicate the validity period of the auxiliary information. In other words, the validity period of the auxiliary information is communicated to at least one second terminal device.

[0076] Furthermore, selectively, the validity period of the above supplementary information includes one of the following (1) or (2):

[0077] (1) The first number of time units from the first time the target transmitting terminal device received the auxiliary information. In other words, the auxiliary information becomes valid within a certain period from the time the second terminal device receives the auxiliary information, and the first number of time units from the first time include the time unit in which the first time exists.

[0078] Selectively, the first number may be set to infinity, meaning it may remain valid from the time the auxiliary information is received. Alternatively, the value of the first number may be determined autonomously by the first terminal device.

[0079] (2) A second time unit from a second time unit that is separated by a third time unit from the time when the target transmitting terminal equipment received the auxiliary information. In other words, the auxiliary information becomes valid within a certain period of time that is a certain time interval from the time the second terminal device receives the auxiliary information.

[0080] Selectively, the above time unit may be a slot, a subslot, or a symbol. Furthermore, the subcarrier spacing (SCS) referenced by the time unit may be limited. The SCS may be an SCS corresponding to a BWP where a resource exists that allows the second terminal device to receive the auxiliary information, or it may be a pre-configured SCS, an SCS defined by a protocol, an SCS configured by a control node, or an SCS indicated by signaling.

[0081] As shown in Figure 7, an embodiment of the present invention provides an information transmission method performed by a first terminal device and a second terminal device that performs sidelink transmission, the method comprising the following process steps.

[0082] In step 201, if the conditions for periodic reporting or predetermined trigger conditions are met, auxiliary information transmitted by the first terminal device is received and used for sidelink transmission.

[0083] In an embodiment of the present invention, when a second terminal device and a first terminal device perform sidelink transmission, sidelink transmission can be realized based on auxiliary information transmitted by the first terminal device when the conditions for periodic reporting or predetermined trigger conditions are met, thereby achieving the objective of improving the reliability of sidelink transmission.

[0084] Selectively, the above auxiliary information can be used by the second terminal device to select resources or adjust parameters for sidelink transmission.

[0085] What needs to be explained is that if the second terminal device uses the Mode 2 resource allocation method, that is, if the UE uses a resource allocation method that is autonomously selected, resource selection conflicts may occur between different TX UEs, and the above auxiliary information can be used to partially resolve the resource conflict problem.

[0086] Selectively, in the information transmission method of the embodiment of the present invention, the auxiliary information includes at least one of a resource set instruction, a resource reselection instruction, a demodulation reference signal DMRS pattern instruction, a DMRS port number instruction, a DMRS port number instruction, a transmit power instruction, a modulation coding scheme MCS instruction, a HARQ feedback activation instruction, and a HARQ feedback type instruction.

[0087] It should be noted that the above auxiliary information must include at least a time-domain resource corresponding to the resource set, a frequency-domain resource corresponding to the resource set, and a resource set instruction for indicating at least one of several sub-resource sets divided in relation to the resource set. In this way, the second terminal device can assist in resource selection when performing sidelink transmission, thereby improving the reliability of transmission between UEs where sidelink transmission is performed. Furthermore, in addition to the resource set instruction, the above auxiliary information may further include at least one of the following: a resource reselection instruction, a DMRS pattern instruction, a DMRS port number instruction, a DMRS port number instruction, a transmit power instruction, an MCS instruction, a HARQ feedback activation instruction, and a HARQ feedback type instruction.

[0088] Based on the above DMRS pattern instruction, the first terminal device may transmit a high-density DMRS to reduce the complexity of channel estimation, or it may transmit a low-density DMRS to reduce overhead. If the above HARQ feedback type instruction is used to specify a broadcast-transmitted HARQ feedback type, the second terminal device may share PSFCH resources with other terminal devices and only feed back NACKs, or it may occupy different PSFCH resources separately from other terminal devices and feed back ACKs or NACKs based on the occupied PSFCH resources.

[0089] Selectively, in the information transmission method of the embodiment of the present invention, if the auxiliary information includes a resource set instruction, the resource set instruction includes at least one of a time-domain resource instruction and a frequency-domain resource instruction.

[0090] The above time-domain resource instruction is used to specify at least one of the period, offset, length, granularity, and resource instruction method of a time-domain resource within a resource set.

[0091] Selectively, the granularity of the above time-domain resource instruction may include, but is not limited to, at least one of Slot(s), sub-slot(s), PSFCH occasion length, PSFCH period, or absolute time interval. The offset of the above time-domain resource instruction may include, but is not limited to, at least one of SFN#0, DFN#0, or the starting position of the resource pool pool. The above time-domain resource instruction method may be specified in a fine-grained form such as period, offset, length, and granularity, or it may be in the form of a bitmap, that is, the bitmap length, starting position, and at least one of the time-domain granularity indicated by the bitmap may be specified in a simple and flexible form, but is not limited to these.

[0092] The above frequency domain resource specification is used to specify at least one of the following for a frequency domain resource within a resource set: offset, length, granularity, and resource specification method.

[0093] Selectively, the granularity of the above frequency domain resource instruction may include, but is not limited to, at least one of a physical resource block, subcarrier, resource pool length, subchannel, component carrier, bandwidth, and absolute frequency domain width. The offset of the above frequency domain resource instruction may include, but is not limited to, at least one of PRB0, common resource block 0, point A, pool start position, and bandwidth part start position. The above frequency domain resource instruction scheme may be in the form of a fine-grained format such as offset, length, and granularity, or it may be in the form of a bitmap, that is, it may be in a simple and flexible format in which the length, start position, and at least one of the frequency domain granularity indicated by the bitmap are indicated.

[0094] Selectively, the parameters for the above-mentioned time-domain resource directives and frequency-domain resource directives can be obtained by one of the following: pre-configuration, protocol-based specification, configuration by control nodes (e.g., configured by upper-layer signaling RRC, PC5-RRC, PC5-S, etc.), dynamic instruction by control nodes (e.g., indicated by DCI, SCI, MAC CE, etc.), dynamic instruction by auxiliary nodes, or by predetermined rules.

[0095] Selectively, in the information transmission method of the embodiment of the present invention, resource instructions based on a subset may be made in bitmap format. Bitmap encoding may be performed first in the time domain and then in the frequency domain, or first in the frequency domain and then in the time domain.

[0096] Selectively, an information transmission method in an embodiment of the present invention may further include, prior to step 201, a step of transmitting a trigger signaling to a first terminal device, the trigger signaling being used to instruct the first terminal device to transmit auxiliary information to a second terminal device.

[0097] Furthermore, it is understood that triggering the transmission of auxiliary information by sending a trigger signaling to the first terminal device can avoid unnecessary signaling overhead. The trigger signaling may be a MAC CE signaling or a sidelink control information SCI signaling. In the case of sidelink control information SCI signaling, it may be triggered, for example, by a specific domain or reuse domain in the 2nd stage SCI. In the case of RRC signaling, it may be triggered, for example, by the Sidelink link interface (also called the PC5 interface) RRC.

[0098] Selectively, the trigger signaling may also be used to instruct the first terminal device to transmit auxiliary information to the second terminal device within a target transmission period. The target transmission period may be one or more time units after the first terminal device receives the trigger signaling, and the time unit may be, but is not limited to, at least one of a slot(s), sub-slot(s), logical slot(s), logical sub-slot(s), PSFCH period, PSFCH occasion, or absolute time.

[0099] Selectively, in the information transmission method of the embodiment of the present invention, the above step of transmitting a trigger signaling to a first terminal device may be carried out as follows.

[0100] A trigger signaling is sent to the first terminal device if at least one of the following conditions (1) to (3) is met. (1) At least one of NACK messages and DTX is continuously detected. For example, if the number of detected NACK messages and / or DTX exceeds a threshold, auxiliary information can be transmitted, which may be a value defined by the protocol, a pre-configured value, or a value configured by the control node. (2) Before transmitting a transmission block TB whose priority is higher than the priority threshold or whose quality of service (QoS) is higher than the QoS threshold. The priority threshold or QoS threshold may be pre-configured, defined by the protocol, or configured by the control node. The QoS threshold may include a reliability threshold or a latency threshold. (3) A first measurement with respect to a first terminal device is less than a first measurement threshold, where the first measurement includes at least one of a reference signal received power RSRP measurement and a distance measurement. The first measurement threshold may be pre-configured, defined by a protocol, or configured by a control node.

[0101] Selectively, in the information transmission method of the embodiment of the present invention, the step of transmitting a trigger signaling to a first terminal device may be performed so as to transmit the trigger signaling to the first terminal device at predetermined time intervals, where the predetermined time interval is smaller than the time interval threshold. In other words, it is undesirable for the frequency of trigger signaling transmitted within a unit time to be too high. In this way, it is possible to ensure that the initiation of trigger signaling to request auxiliary information to the first terminal device is not frequent.

[0102] The frequency thresholds described above may be pre-configured, defined by a protocol, or configured by a control node. More selectively, the frequency thresholds may be associated with a target channel busy rate (CBR) or target occupancy rate (CR), that is, corresponding frequency thresholds may be configured separately for different CBR ranges or CR ranges.

[0103] It should be explained that the first terminal device may transmit the above-mentioned auxiliary information not only by the second terminal device but also by a control node, or the first terminal device may transmit the auxiliary information periodically, or the first terminal device may transmit the auxiliary information when it determines that a predetermined trigger condition has been met. For specific details, please refer to the relevant details of the embodiment of the information transmission method performed by the first terminal device described above, and a detailed explanation will be omitted here.

[0104] Selectively, in the information transmission method of the embodiment of the present invention, step 201 may be specifically performed to receive a first signaling on which auxiliary information is carried. In other words, the auxiliary information can be received in the form of a signaling on which the auxiliary information is carried.

[0105] The first signaling may be an RRC signaling, a DCI signaling, a PC5-RRC signaling, a MAC CE signaling, or an SCI signaling. Selectively, if the first signaling is an SL signaling (e.g., a PC5-RRC signaling or an SCI signaling), the first signaling may be transmitted by a standalone PSCCH or by a PSSCH or PSCCH corresponding to a subchannel or a subslot.

[0106] Furthermore, to enable the second terminal device to efficiently and accurately receive auxiliary information for enhancing the reliability of the sidelink transmission, the first signaling also carries at least one of the following (1) to (4). (1) A method for issuing resource set instructions when auxiliary information includes resource set instructions. Furthermore, it is understood that the instruction domain in the signaling allows for specifying which instruction method to adopt when multiple resource set instruction methods are supported. (2) A signaling identifier for indicating that the first signaling is to be used for the transmission of auxiliary information. (3) Identifier ID of the first terminal device. (4) Identifier ID of at least one second terminal device.

[0107] Selectively, in the information transmission method of the embodiment of the present invention, the validity period of auxiliary information for sidelink transmission can be obtained by a different method. The following specific embodiments are included, but are not limited to, the method for obtaining the validity period of auxiliary information.

[0108] Specific Example 1 In this specific embodiment 1, the information transmission method of the embodiment of the present invention may further include the step of receiving a second signaling from a first terminal device, the second signaling being used to indicate the validity period of the auxiliary information. In other words, the validity period of the auxiliary information can be obtained by the signaling transmitted from the first terminal device.

[0109] Specific Example 2 In the specific embodiment 2, the method for determining the validity period of the above-mentioned auxiliary information includes pre-configuration, specification by protocol, or configuration by a control node.

[0110] Selectively, the validity period of the auxiliary information in any of the above specific embodiments may include one of the following (1) or (2).

[0111] (1) The first number of time units from the first time the target transmitting terminal device received the auxiliary information. In other words, the auxiliary information becomes valid within a certain period from the time the second terminal device receives the auxiliary information, and the first number of time units from the first time include the time unit in which the first time exists.

[0112] Selectively, the first number may be set to infinity, meaning it may remain valid from the time the auxiliary information is received. Alternatively, the value of the first number may be determined autonomously by the first terminal device.

[0113] (2) A second time unit from a second time unit that is separated by a third time unit from the time when the target transmitting terminal equipment received the auxiliary information. In other words, the auxiliary information becomes valid within a certain period of time that is a certain time interval from the time the second terminal device receives the auxiliary information.

[0114] Selectively, the above time unit may be a slot, a subslot, or a symbol. Furthermore, the subcarrier interval SCS that the time unit refers to may be limited. The SCS may be an SCS corresponding to a BWP where a resource exists that allows the second terminal device to receive the auxiliary information, or it may be a pre-configured SCS, an SCS defined by a protocol, an SCS configured by a control node, or an SCS indicated by signaling.

[0115] As shown in Figure 8, an embodiment of the present invention provides a first terminal device 300. The first terminal device 300 includes a transmission module 301 for transmitting auxiliary information to at least one second terminal device when periodic reporting conditions or predetermined trigger conditions are met, and the auxiliary information is used by at least one second terminal device to perform sidelink transmission.

[0116] Selectively, the first terminal device 300 of an embodiment of the present invention may further include a determination module for determining whether a predetermined trigger condition is met when it receives a first trigger signaling transmitted from a control node before transmitting auxiliary information to at least one second terminal device, the first trigger signaling being used to instruct the first terminal device to transmit auxiliary information to at least one second terminal device.

[0117] Selectively, in the first terminal device 300 of an embodiment of the present invention, the first trigger signaling includes a target designation domain, which is used to instruct the first terminal device to transmit auxiliary information to at least one second terminal device.

[0118] Selectively, in the first terminal device 300 of an embodiment of the present invention, the first trigger signaling includes one of the following: DCI signaling using the target downlink control information DCI format, or DCI signaling scrambled using the target radio network temporary identifier RNTI.

[0119] Selectively, in the first terminal device 300 of an embodiment of the present invention, the determination module may further be used to determine that a predetermined trigger condition is met when it receives a second trigger signaling transmitted from at least one second terminal device before transmitting auxiliary information to at least one second terminal device, the second trigger signaling being used to instruct the first terminal device to transmit auxiliary information to at least one second terminal device.

[0120] Selectively, in the first terminal device 300 of an embodiment of the present invention, the transmission module 301 may be specifically used to transmit auxiliary information to at least one second terminal device within a target transmission period, the method for determining the target transmission period includes one of instruction by second trigger signaling, definition by protocol, configuration by a control node, or pre-configuration.

[0121] Selectively, in the first terminal device 300 of an embodiment of the present invention, the second trigger signaling is transmitted by at least one second terminal device if at least one of the following conditions is met: at least one of a negative response NACK message and an intermittent transmission DTX is continuously detected; before transmitting a transmission block TB whose priority is higher than the priority threshold or whose quality of service QoS is higher than the QoS threshold; and a first measurement with the first terminal device is less than the first measurement threshold, and the first measurement includes at least one of the reference signal received power RSRP measurement and a distance measurement.

[0122] Selectively, in the first terminal device 300 of the embodiment of the present invention, the second trigger signaling is transmitted at predetermined time intervals by at least one second terminal device, and the predetermined time interval is smaller than a time interval threshold.

[0123] Selectively, in the first terminal device 300 of an embodiment of the present invention, the predetermined trigger conditions include at least one of the following: a second measurement with each of at least one second terminal device is less than a second measurement threshold and the second measurement includes at least one of an RSRP measurement and a distance measurement; having at least one radio resource control RRC connection based on a PC5 interface; a number of occupied resources, a number of pre-occupied resources, or a number of reserved resources is greater than a resource number threshold; a collision of hybrid auto retransmission request HARQ feedback is detected; and a resource collision of physical sidelink shared channel PSSCH transmission is detected.

[0124] Selectively, in the first terminal device 300 of an embodiment of the present invention, the transmission module 301 may be used to transmit auxiliary information semi-continuously or aperiodically to at least one second terminal device when a predetermined trigger condition is met.

[0125] Selectively, in the first terminal device 300 of the embodiment of the present invention, the auxiliary information includes at least one of a resource set instruction, a resource reselection instruction, a demodulation reference signal DMRS pattern instruction, a DMRS port number instruction, a DMRS port number instruction, a transmit power instruction, a modulation coding scheme MCS instruction, a HARQ feedback activation instruction, and a HARQ feedback type instruction.

[0126] Selectively, in the first terminal device 300 of an embodiment of the present invention, if the auxiliary information includes a resource set instruction, the resource set instruction includes at least one of a time-domain resource instruction and a frequency-domain resource instruction, the time-domain resource instruction is used to specify at least one of the period, offset, length, granularity, and resource instruction scheme of a time-domain resource in the resource set, and the frequency-domain resource instruction is used to specify at least one of the offset, length, granularity, and resource instruction scheme of a frequency-domain resource in the resource set.

[0127] Selectively, in the first terminal device 300 of an embodiment of the present invention, if the auxiliary information includes a resource set instruction and the resource set is divided into a plurality of sub-resource sets, the resource set instruction includes a sub-resource set instruction, and the sub-resource set instruction is used to specify at least one of the following: time domain granularity, frequency domain granularity, time domain start position, frequency domain start position, time domain length, frequency domain length, time domain period, frequency domain period, and sub-resource set instruction method corresponding to the sub-resource set.

[0128] Selectively, in the first terminal device 300 of the embodiment of the present invention, the transmission module 301 may be specifically used to transmit auxiliary information to at least one second terminal device by first signaling.

[0129] Selectively, in the first terminal device 300 of an embodiment of the present invention, the first signaling is further used to carry a resource set instruction method when the auxiliary information includes a resource set instruction, a signaling identifier for indicating that the first signaling is used for transmitting the auxiliary information, an identifier for the first terminal device, and an identifier for at least one second terminal device.

[0130] Selectively, the first terminal device 300 of the embodiment of the present invention may further comprise a transmitting module for transmitting a second signaling to at least one second terminal device, the second signaling being used to indicate the validity period of auxiliary information.

[0131] Selectively, in the first terminal device 300 of the embodiment of the present invention, the effective period of the auxiliary information includes one of the following: a first number of time units from a first time when the target transmitting terminal device receives the auxiliary information, and a second number of time units from a second time that is separated by a third number of time units from the time when the target transmitting terminal device receives the auxiliary information.

[0132] Furthermore, the first terminal device 300 provided in the embodiment of the present invention can implement the information transmission method performed by the first terminal device 300 described above, and all the relevant explanations regarding the information transmission method also apply to the first terminal device 300, but it is understood that a detailed explanation is omitted here.

[0133] In embodiments of the present invention, when sidelink transmission is performed between a first terminal device and at least one second terminal device, the reliability of the sidelink transmission can be improved by transmitting auxiliary information that each second terminal device can use to perform sidelink transmission to the at least one second terminal device when the conditions for periodic reporting or predetermined trigger conditions are met.

[0134] As shown in Figure 9, an embodiment of the present invention provides a second terminal device 400. The second terminal device 400 includes a receiving module 401 for receiving auxiliary information transmitted by the first terminal device when periodic reporting conditions or predetermined trigger conditions are met, and the auxiliary information is used for sidelink transmission.

[0135] Selectively, the second terminal device 400 of the embodiment of the present invention may further comprise a transmitting module for transmitting a trigger signaling to the first terminal device, the trigger signaling being used to instruct the first terminal device to transmit auxiliary information to the second terminal device.

[0136] Selectively, in the second terminal device 400 of an embodiment of the present invention, the transmission module may be used to transmit a trigger signaling to the first terminal device if at least one of the following conditions is met: at least one of a negative response NACK message and an intermittent transmission DTX is continuously detected; before transmitting a transmission block TB whose priority is higher than a priority threshold or whose quality of service QoS is higher than a QoS threshold; and a first measurement with the first terminal device is less than a first measurement threshold, and the first measurement includes at least one of a reference signal received power RSRP measurement and a distance measurement.

[0137] Selectively, in the second terminal device 400 of the embodiment of the present invention, the transmission module may be specifically used to transmit trigger signaling to the first terminal device at predetermined time intervals, wherein the predetermined time interval is smaller than a time interval threshold.

[0138] Selectively, in the second terminal device 400 of the embodiment of the present invention, the auxiliary information includes at least one of a resource set instruction, a resource reselection instruction, a demodulation reference signal DMRS pattern instruction, a DMRS port number instruction, a DMRS port number instruction, a transmit power instruction, a modulation coding scheme MCS instruction, a HARQ feedback activation instruction, and a HARQ feedback type instruction.

[0139] Selectively, in the second terminal device 400 of the embodiment of the present invention, if the auxiliary information includes a resource set instruction, the resource set instruction includes at least one of a time-domain resource instruction and a frequency-domain resource instruction, the time-domain resource instruction is used to specify at least one of the period, offset, length, granularity, and resource instruction scheme of a time-domain resource in the resource set, and the frequency-domain resource instruction is used to specify at least one of the offset, length, granularity, and resource instruction scheme of a frequency-domain resource in the resource set.

[0140] Selectively, in the second terminal device 400 of the embodiment of the present invention, if the auxiliary information includes a resource set instruction and the resource set is divided into a plurality of sub-resource sets, the resource set instruction includes a sub-resource set instruction, and the sub-resource set instruction is used to specify at least one of the following: time domain granularity, frequency domain granularity, time domain start position, frequency domain start position, time domain length, frequency domain length, time domain period, frequency domain period, and sub-resource set instruction method corresponding to the sub-resource set.

[0141] Selectively, in the second terminal device 400 of the embodiment of the present invention, the receiving module 401 may be specifically used to receive a first signaling on which auxiliary information is carried.

[0142] Selectively, in the second terminal device 400 of the embodiment of the present invention, the first signaling further carries at least one of a resource set instruction method when the auxiliary information includes a resource set instruction, a signaling identifier for indicating that the first signaling is used for transmitting auxiliary information, an identifier for the first terminal device, and an identifier for the second terminal device.

[0143] Selectively, in the second terminal device 400 of the embodiment of the present invention, the receiving module 401 may further be used to receive a second signaling from the first terminal device, the second signaling being used to indicate the validity period of auxiliary information.

[0144] Selectively, in the second terminal device 400 of the embodiment of the present invention, the method for determining the validity period of the above-mentioned auxiliary information includes pre-configuration, provision by protocol, or configuration by a control node.

[0145] Selectively, in the second terminal device 400 of the embodiment of the present invention, the effective period of the auxiliary information includes one of the following: a first number of time units from a first time when the target transmitting terminal device receives the auxiliary information, and a second number of time units from a second time that is separated by a third number of time units from the time when the target transmitting terminal device receives the auxiliary information.

[0146] Furthermore, the second terminal device 400 provided in the embodiment of the present invention can implement the information transmission method performed by the second terminal device 400 described above, and all the relevant explanations regarding the information transmission method also apply to the second terminal device 400, but it is understood that a detailed explanation is omitted here.

[0147] In an embodiment of the present invention, when a second terminal device and a first terminal device perform sidelink transmission, sidelink transmission can be realized based on auxiliary information transmitted by the first terminal device when the conditions for periodic reporting or predetermined trigger conditions are met, thereby achieving the objective of improving the reliability of sidelink transmission.

[0148] Figure 10 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 500 shown in Figure 10 comprises at least one processor 501, memory 502, at least one network interface 504, and a user interface 503. Each component in the terminal device 500 is connected by a bus system 505. It is understood that the bus system 505 is for enabling connection communication between these components. In addition to the data bus, the bus system 505 further includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, all the various buses in Figure 10 are represented as the bus system 505.

[0149] The user interface 503 may include a display, keyboard, pointing device (e.g., mouse, trackball), touch-sensitive plate, or touchscreen.

[0150] In the embodiments of the present invention, memory 502 may be volatile memory or non-volatile memory, and may include both volatile and non-volatile memory. Non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or flash memory. Volatile memory may be random access memory (RAM) used as external cache memory. As described in this illustrative and non-limiting explanation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous-connected dynamic random access memory (Synchlink DRAM, SLDRAM), and direct Rambus random access memory (Direct Rambus RAM, DRRAM). The memory 502 of the systems and methods described in embodiments of the present invention includes, but is not limited to, these memories and any other suitable memories.

[0151] In some embodiments, the memory 502 stores elements of an operating system 5021 and an application program 5022, which are executable modules or data structures or subsets or extensions thereof.

[0152] The operating system 5021 includes various system programs, such as a framework layer, core library layer, and driving layer, to implement various basic business and hardware-based tasks. The application program 5022 includes various application programs, such as a media player and browser, to implement various application services. A program that implements the method of the embodiment of the present invention may be included in the application program 5022.

[0153] In an embodiment of the present invention, the terminal device 500 further comprises a computer program stored in memory 502 and executable by processor 501.

[0154] Selectively, when the above computer program is executed by processor 501, When the conditions for periodic reporting or predetermined trigger conditions are met, it is possible to perform the step of transmitting auxiliary information to at least one second terminal device, the auxiliary information being used by at least one second terminal device for sidelink transmission.

[0155] In embodiments of the present invention, when sidelink transmission is performed between a first terminal device and at least one second terminal device, the reliability of the sidelink transmission can be improved by transmitting auxiliary information that each second terminal device can use to perform sidelink transmission to the at least one second terminal device when the conditions for periodic reporting or predetermined trigger conditions are met.

[0156] If the above computer program is selectively executed by processor 501, then, It is possible to implement a step of receiving auxiliary information transmitted by a first terminal device when the conditions for periodic reporting or predetermined trigger conditions are met, and the auxiliary information is used for sidelink transmission.

[0157] In an embodiment of the present invention, when a second terminal device and a first terminal device perform sidelink transmission, sidelink transmission can be realized based on auxiliary information transmitted by the first terminal device when the conditions for periodic reporting or predetermined trigger conditions are met, thereby achieving the objective of improving the reliability of sidelink transmission.

[0158] The methods disclosed in the above embodiments of the present invention can be used in or implemented by a processor 501. The processor 501 may be an integrated circuit chip having signal processing capabilities. In implementation, each step of the above method can be completed by hardware integrated logic circuits or software-based instructions within the processor 501. The processor 501 may be a common processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. Each method, step, and logic block diagram disclosed in the embodiments of the present invention can be implemented or executed. The common processor may be a microprocessor or any general-purpose processor. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented to be executed and completed by a hardware decoding processor, or by a combination of hardware and software modules within the decoding processor. The software module may be located in a computer-readable storage medium commonly used in this field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, or registers. The computer-readable storage medium is located in memory 502, and the processor 501 reads the information in memory 502 and, in cooperation with its hardware, completes the steps of the above method. Specifically, a computer program is stored in the computer-readable storage medium, and when the computer program is executed by the processor 501, each step of the above information transmission method embodiment is realized.

[0159] It is understood that the embodiments described in the embodiments of the present invention can be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processing (DSPs), digital signal processing devices (DSP devices, DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), common processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in the present invention, or a combination thereof.

[0160] Regarding implementation by software, the technology described in the embodiment of the present invention can be realized by a module (e.g., a process, a function, etc.) for executing the functions described in the embodiment of the present invention. The software code can be stored in memory and executed by a processor. Memory can be implemented within or outside the processor.

[0161] The terminal device 500 can implement each of the processes realized by the terminal device in the embodiment described above, but to avoid duplication, a detailed explanation is omitted here.

[0162] Preferably, embodiments of the present invention further provide a first terminal device comprising a processor, memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, each process of the embodiment of the information transmission method corresponding to Figure 1 is realized, and similar technical effects can be achieved. To avoid redundancy, a detailed explanation is omitted here.

[0163] Embodiments of the present invention further provide a computer-readable storage medium. A computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, each process of the embodiment of the information transmission method corresponding to Figure 1 is realized, and similar technical effects can be achieved. To avoid redundancy, a detailed explanation is omitted here. The computer-readable storage medium is, for example, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0164] Preferably, embodiments of the present invention further provide a second terminal device comprising a processor, memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, each process of the embodiment of the information transmission method corresponding to Figure 7 is realized, and similar technical effects can be achieved. To avoid redundancy, a detailed explanation is omitted here.

[0165] Embodiments of the present invention further provide a computer-readable storage medium. A computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, each process of the embodiment of the information transmission method corresponding to Figure 7 is realized, and similar technical effects can be achieved. To avoid redundancy, a detailed explanation is omitted here. The computer-readable storage medium is, for example, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0166] It should be explained that in this specification, the terms “including,” “consisting of,” or any other variation thereof are intended to include non-exclusive inclusion, thereby meaning that a process, method, article, or apparatus containing a set of elements includes not only those elements but also other elements not explicitly stated, or elements specific to such process, method, article, or apparatus. Unless otherwise specified, an element limited by the phrase “including one…” does not preclude the existence of other identical elements in a process, method, article, or apparatus containing that element.

[0167] From the above description of the embodiments, it will be clear to those skilled in the art that the methods of the above embodiments can be implemented in the form of a combination of software and a necessary common hardware platform, and of course, they may also be implemented by hardware, but in many cases the former is a more preferred embodiment. Based on this view, the technical solutions of the present invention can be implemented substantially or in part in the form of a software product, the computer software product being stored on a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and including a plurality of instructions that cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network equipment, etc.) to execute the methods of each embodiment of the present invention.

[0168] Although embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above-described specific embodiments. The above-described specific embodiments are merely illustrative and not limiting. Many forms that a person skilled in the art can make based on the suggestions of the present invention without departing from the spirit of the invention and the scope of protection of the claims are all within the scope of protection of the present invention.

Claims

1. An information transmission method applied to a first terminal device, The process includes the step of transmitting auxiliary information to at least one second terminal device when a predetermined trigger condition is met, wherein the auxiliary information is used by the at least one second terminal device to perform sidelink transmission. If the auxiliary information is a resource reselection instruction, the predetermined trigger condition includes the detection of a resource collision in a physical sidelink shared channel PSSCH transmission. If the auxiliary information is a resource set instruction, when the predetermined trigger condition is met, before the step of transmitting the auxiliary information to at least one second terminal device, An information transmission method further comprising the step of determining that a predetermined trigger condition is met upon receiving a second trigger signaling transmitted from the at least one second terminal device, wherein the second trigger signaling is used to instruct the first terminal device to transmit the auxiliary information to the at least one second terminal device.

2. The step of transmitting auxiliary information to at least one second terminal device is, The method for determining the target transmission period includes the step of transmitting auxiliary information to at least one second terminal device within the target transmission period, and the method for determining the target transmission period is: The method according to claim 1, comprising a configuration with a control node.

3. The second trigger signaling is, The condition is that at least one of the following is continuously detected: a negative response NACK message and an intermittent transmission DTX. The conditions are: before sending a transmission block TB where the priority is higher than the priority threshold or the quality of service (QoS) is higher than the QoS threshold. The method according to claim 1, wherein a first measurement with the first terminal device is less than a first measurement threshold, and the first measurement includes at least one of a reference signal received power RSRP measurement and a distance measurement, and is transmitted by the at least one second terminal device.

4. The method according to claim 1, wherein the second trigger signaling is transmitted by the at least one second terminal device at predetermined time intervals, and the predetermined time interval is smaller than a time interval threshold.

5. The step of transmitting auxiliary information to at least one second terminal device when a predetermined trigger condition is met is as follows: The method according to claim 1, further comprising the step of transmitting the auxiliary information to at least one second terminal device semi-continuously or aperiodically when the predetermined trigger condition is met.

6. The step of transmitting auxiliary information to at least one second terminal device is, The method according to claim 5, comprising the step of transmitting the auxiliary information to at least one second terminal device by first signaling.

7. A terminal device comprising memory, a processor, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 6 are realized.

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