Multi-carrier transmission method and device suitable for direct link

Abstract

The invention provides a multi-carrier transmission method and device suitable for a straight-through link. The method comprises the following steps: executing physical straight-through link control channel and / or physical straight-through link shared channel transmission on a carrier set; the carrier set is a set of carriers for carrier aggregation; and determining the first behavior according to the received related hybrid automatic repeat request acknowledgement information. According to the multi-carrier transmission method and device suitable for the straight-through link, physical straight-through link control channel and / or physical straight-through link shared channel transmission is executed on a carrier set used for carrier aggregation, and a first behavior is determined according to received related hybrid automatic repeat request acknowledgement information; the problem that an existing HARQ feedback mechanism cannot be directly multiplexed under the multi-carrier condition is solved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a transmission method and device under multi-carrier applicable to a direct link. Background Art

[0002] The 3rd Generation Partnership Project (3GPP) introduced carrier aggregation (CA) in the sidelink (SL) in the Release 15 (R15) stage, supporting the terminal to transmit on multiple carriers, thereby increasing the data transmission rate and improving the reliability of transmission. In the R16 stage, the sidelink introduced unicast and multicast communication modes on the basis of broadcast, and unicast and multicast support hybrid automatic repeat request (HARQ) feedback. The terminal can determine whether to continue to perform subsequent retransmissions based on the received HARQ feedback information. Compared with blind retransmission, HARQ-based retransmission can further increase the reliability of transmission. In the R18 stage, one of the features proposed by 3GPP for the sidelink is the carrier aggregation mechanism, but the current HARQ feedback mechanism is for a single carrier. The HARQ feedback mechanism working in the case of multiple carriers has not yet been standardized, and the HARQ feedback mechanism under a single carrier cannot be directly multiplexed in the case of multiple carriers. Summary of the invention

[0003] The embodiments of the present application provide a transmission method and device under multi-carrier applicable to a direct link, so as to solve the problem that the existing HARQ feedback mechanism cannot be directly multiplexed under multi-carrier.

[0004] In a first aspect, an embodiment of the present application provides a transmission method under multiple carriers applicable to a direct link, which is applied to a first terminal, including:

[0005] Performing physical direct link control channel PSCCH and / or physical direct link shared channel PSSCH transmission on a carrier set; the carrier set is a set of carriers used for carrier aggregation;

[0006] The first behavior is determined according to the received related hybrid automatic repeat request acknowledgement HARQ-ACK information.

[0007] In some embodiments, the carrier set satisfies one or more of the following conditions:

[0008] The subcarrier spacing of any carrier in the carrier set is the same;

[0009] The through link synchronization signal block S-SSB period of any carrier configuration in the carrier set is the same;

[0010] The number of S-SSB time slots configured for any carrier in the carrier set is the same;

[0011] The S-SSB time slot positions of any carrier configurations in the carrier set are the same;

[0012] The uplink time domain resources configured on any carrier in the carrier set are the same;

[0013] The downlink time domain resources configured on any carrier in the carrier set are the same;

[0014] The physical direct link feedback channel PSFCH resource period in the resource pool on any carrier in the carrier set is the same;

[0015] The bitmap for configuring time domain resources in the resource pool on any carrier in the carrier set is the same;

[0016] The first type of time slots on any carrier in the carrier set are the same, wherein the first type of time slots are all time slots excluding time slots configured with S-SSB, time slots unavailable for direct link transmission, and reserved time slots.

[0017] In some embodiments, determining the first behavior based on the received related HARQ-ACK information includes:

[0018] When the first condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last PSCCH and / or PSSCH transmission on the carrier set;

[0019] The first condition is that a second behavior exists on at least one carrier in the carrier set;

[0020] The second behavior includes at least one of the following:

[0021] When the direct link control information SCI supports NACK-only feedback, no negative NACK feedback is received for the PSCCH and / or PSSCH transmission;

[0022] Positive ACK feedback is received for the PSCCH and / or PSSCH transmission.

[0023] In some embodiments, determining the first behavior based on the received related HARQ-ACK information includes:

[0024] When the second condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last transmission on the first carrier; the first carrier is one or more carriers in the carrier set and the PSCCH and / or PSSCH transmission is on the first carrier;

[0025] The second condition is that a third behavior exists on the first carrier;

[0026] The third behavior includes at least one of the following:

[0027] When the SCI supports NACK-only feedback, no NACK feedback is received for the PSCCH and / or PSSCH transmission;

[0028] An ACK feedback is received for the PSCCH and / or PSSCH transmission.

[0029] In some embodiments, the method further comprises:

[0030] In the case where there is a half-duplex conflict problem between PSFCH reception on the first carrier and PSCCH and / or PSSCH transmission on the second carrier, triggering a fourth behavior, wherein the first carrier and the second carrier are different carriers in the carrier set;

[0031] The fourth behavior includes at least one of the following:

[0032] triggering resource reselection of PSCCH and / or PSSCH on the second carrier;

[0033] Determine a fifth behavior based on a priority of the PSFCH on the first carrier, and a priority of the PSCCH and / or PSSCH on the second carrier;

[0034] The PSCCH and / or PSSCH on the second carrier performs partial transmission.

[0035] In some embodiments, determining a fifth behavior based on a priority of the PSFCH on the first carrier and a priority of the PSCCH and / or PSSCH on the second carrier includes:

[0036] If the priority of the PSFCH on the first carrier is higher than the priority of the PSCCH and / or PSSCH on the second carrier, abandon the sending of the PSCCH and / or PSSCH on the second carrier;

[0037] and / or,

[0038] If the priority of the PSFCH on the first carrier is lower than the priority of the PSCCH and / or PSSCH on the second carrier, the PSFCH reception on the first carrier is abandoned.

[0039] In some embodiments, the method further comprises:

[0040] When performing resource selection for PSCCH and / or PSSCH transmission on the second carrier, excluding all resources on the first time unit in the resource pool;

[0041] The first time unit satisfies one or more of the following conditions:

[0042] The resource pool is not configured with PSFCH resources in the first time unit;

[0043] The third carrier configures PSFCH resources in the first time unit, and the first terminal performs PSFCH reception in the first time unit on the third carrier;

[0044] The second carrier and the third carrier belong to different carriers in the carrier set.

[0045] In a second aspect, an embodiment of the present application provides a transmission method under multiple carriers applicable to a direct link, which is applied to a second terminal, including:

[0046] Perform PSCCH and / or PSSCH reception on a carrier set; the carrier set is a set of carriers used for carrier aggregation;

[0047] HARQ-ACK information is determined based on the received PSCCH and / or PSSCH, and PSFCH transmission is performed, where the PSFCH transmission is used to carry the HARQ-ACK information.

[0048] In some embodiments, the method further comprises:

[0049] The total number of PSFCH transmissions on all carriers in the carrier set within a time unit does not exceed a first threshold value, and / or the total PSFCH transmission power on all carriers in the carrier set within a time unit does not exceed a second threshold value;

[0050] The first threshold value represents the maximum number of PSFCH transmissions supported by all carriers in the carrier set within a time unit; the second threshold value represents the maximum PSFCH transmission power supported by all carriers in the carrier set within a time unit.

[0051] In some embodiments, the method further comprises:

[0052] The PSFCH transmission number and the PSFCH transmission power are determined based on at least one of the total number of scheduled PSFCH transmissions, a first power value, the first threshold value, and the second threshold value.

[0053] In a third aspect, an embodiment of the present application provides a first terminal, including a memory, a transceiver, and a processor;

[0054] A memory for storing a computer program; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer program in the memory and executing the transmission method under multiple carriers applicable to a direct link as described in the first aspect above.

[0055] In a fourth aspect, an embodiment of the present application provides a second terminal, including a memory, a transceiver, and a processor;

[0056] A memory for storing a computer program; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer program in the memory and executing the transmission method under multiple carriers applicable to a direct link as described in the first aspect above.

[0057] In a fifth aspect, an embodiment of the present application provides a transmission device under multi-carriers applicable to a direct link, including:

[0058] A sending module, used to perform physical direct link control channel PSCCH and / or physical direct link shared channel PSSCH transmission on a carrier set; the carrier set is a carrier used for carrier aggregation;

[0059] A determination module is used to determine a first behavior according to the received related HARQ-ACK information.

[0060] In a sixth aspect, an embodiment of the present application provides a transmission device under multiple carriers applicable to a direct link, including:

[0061] A receiving module, configured to perform PSCCH and / or PSSCH reception on a carrier set; the carrier set is a set of carriers used for carrier aggregation;

[0062] A transmission module is used to determine HARQ-ACK information according to the received PSCCH and / or PSSCH, and perform PSFCH transmission, where the PSFCH transmission is used to carry the HARQ-ACK information.

[0063] In the seventh aspect, an embodiment of the present application also provides a non-transitory readable storage medium, which stores a computer program, and the computer program is used to enable a processor to execute the transmission method under multiple carriers applicable to a direct link as described in the first aspect or the second aspect above.

[0064] In an eighth aspect, an embodiment of the present application further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the transmission method under multiple carriers applicable to a direct link as described in the first aspect or the second aspect above.

[0065] In the ninth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is used to enable a computer to execute the transmission method under multiple carriers applicable to a direct link as described in the first aspect or the second aspect above.

[0066] In the tenth aspect, an embodiment of the present application further provides a communication device, in which a computer program is stored, and the computer program is used to enable the communication device to execute the transmission method under multiple carriers applicable to a direct link as described in the first aspect or the second aspect above.

[0067] In the eleventh aspect, an embodiment of the present application further provides a chip product, in which a computer program is stored, and the computer program is used to enable the chip product to execute the transmission method under multiple carriers applicable to a direct link as described in the first aspect or the second aspect above.

[0068] The present application provides a transmission method and device for multiple carriers in a direct link, which performs PSCCH and / or PSSCH transmission on a set of carriers used for carrier aggregation, and determines a first behavior based on the received related HARQ ACK information, thereby avoiding the problem that the existing HARQ feedback mechanism cannot be directly multiplexed in the case of multiple carriers. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technical descriptions. Obviously, the drawings described below are 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.

[0070] Figure 1 It is a schematic diagram of PSFCH resource configuration;

[0071] Figure 2 is a schematic diagram of half-duplex transmission of carrier aggregation;

[0072] Figure 3 This is one of the flow diagrams of the transmission method under multi-carrier applicable to a direct link provided in an embodiment of the present application;

[0073] Figure 4It is a schematic diagram of indicating a logical time slot by means of a Bitmap provided in an embodiment of the present application;

[0074] Figure 5 is a schematic diagram of the first behavior provided in an embodiment of the present application;

[0075] Figure 6 It is a schematic diagram of inconsistent PSFCH time domain resources of different carriers provided in an embodiment of the present application;

[0076] Figure 7 This is a second flow chart of a transmission method under multiple carriers applicable to a direct link provided in an embodiment of the present application;

[0077] Figure 8 is a structural diagram of a first terminal provided in an embodiment of the present application;

[0078] Fig. 9 is a structural schematic diagram of a second terminal provided in an embodiment of the present application;

[0079] Fig.10 This is one of the structural schematic diagrams of a transmission device under multi-carriers applicable to a direct link provided in an embodiment of the present application;

[0080] Fig.11 This is the second structural schematic diagram of a transmission device under multi-carrier applicable to a direct link provided in an embodiment of the present application. DETAILED DESCRIPTION

[0081] The through link (Sidelink, SL) involved in the embodiments of the present application is also called a side link or a side link.

[0082] R16 New Radio (NR)-Internet of Vehicles / Vehicle-to-everything (V2X) resource pool configuration:

[0083] The embodiment of the present application relates to the time domain configuration of a resource pool. A time slot is the minimum granularity of the time domain configuration of a resource pool. The time slots in a resource pool are periodically configured in a bitmap manner.

[0084] For the time slot set configured in the resource pool, the following description applies:

[0085] 1. The period is 10240ms, and the Bitmap length can be {10, 11, 12, ..., 160};

[0086] 2. If the reference timing of the serving cell is available, the time slot index is relative to the time slot 0 (Slot#0) in the system frame number 0 (System Frame Number 0, SFN0), otherwise it is relative to the direct frame number 0 (Direct Frame Number 0, DFN0);

[0087] 3. When configuring time slots (logical time slots) in the resource pool, the following time slots need to be excluded:

[0088] Configure the time slot of the sidelink synchronization signal block (S-SSB);

[0089] timeslots in which the number of consecutive available uplink symbols (UL symbols) is less than X, where X is determined by the higher layer parameter sl-LengthSymbols;

[0090] Book a time slot.

[0091] R16 NR-V2X HARQ feedback mechanism:

[0092] 1. Feedback method based on HARQ NACK

[0093] In this way, all receiving terminals (Rx UE) share the same physical sidelink feedback channel (PSFCH) resources. If any terminal / user equipment (UE) fails to correctly receive the physical sidelink shared channel (PSSCH), HARQ NACK information is sent on the shared PSFCH resources. After receiving the NACK information, the UE will retransmit the PSSCH.

[0094] 2. Feedback method based on HARQ ACK / NACK

[0095] In this way, each Rx UE has its own independent PSFCH resource. Each Rx UE sends HARQ ACK / NACK information on the corresponding PSFCH resource based on whether it correctly receives PSSCH. The UE can cancel subsequent retransmissions after receiving ACK, and retransmit PSSCH after receiving NACK.

[0096] PSFCH resource determination method:

[0097] Figure 1 It is a schematic diagram of PSFCH resource configuration, such as Figure 1As shown, PSFCH resources are parameters based on resource pool configuration. In the time domain, PSFCH resources are configured once every N logical time slots, where N can be {1, 2, 4}. In the frequency domain, a bitmap is used to indicate the set of physical resource blocks (PRBs) that can be used for PSFCH transmission and reception.

[0098] The minimum delay K for HARQ feedback processing is a resource pool-based configuration, K = {2, 3}.

[0099] Carrier Aggregation:

[0100] 3GPP R15 introduces carrier aggregation in direct links. Figure 2 This is a schematic diagram of half-duplex transmission of carrier aggregation, such as Figure 2 As shown, on the one hand, carrier aggregation can support segmented transmission of larger service packets on different carriers, thereby improving the peak transmission rate; carrier aggregation should also consider sending independent service packets on multiple carriers, and improving reliability by repeatedly sending the same service packet on multiple carriers.

[0101] However, multi-carrier transmission and reception are subject to the limitation of half-duplex, that is, if transmission is performed on one carrier, reception cannot be performed on other carriers; similarly, if reception is performed on one carrier, transmission cannot be performed on other carriers.

[0102] Currently, the resource pool configuration in the direct link considers the single-carrier situation. For the multi-carrier situation such as carrier aggregation, if the resource pool configuration is not restricted, it may cause more serious problems, such as half-duplex problems.

[0103] Currently, in direct links, the HARQ feedback mechanism is aimed at single-carrier situations. For multi-carrier situations such as intra-band carrier aggregation, the original HARQ feedback mechanism is no longer applicable, because the full multiplexing HARQ feedback mechanism may cause the UE to retransmit too many PSSCHs on different carriers, thereby causing more serious half-duplex problems or reduced transmission power problems.

[0104] Based on the above technical problems, an embodiment of the present application proposes a transmission method and device under multiple carriers suitable for a direct link, performs PSCCH and / or PSSCH transmission on a set of carriers used for carrier aggregation, and determines a first behavior based on the received related HARQ ACK information, thereby avoiding the problem that the existing HARQ feedback mechanism cannot be directly multiplexed in the case of multiple carriers.

[0105] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0106] Figure 3 This is one of the flow charts of the transmission method under multi-carrier applicable to the direct link provided in the embodiment of the present application, such as Figure 3 As shown, the embodiment of the present application provides a transmission method under multi-carrier applicable to a direct link, and the execution subject may be a first terminal, such as a vehicle-mounted terminal, a mobile phone, etc. The method includes:

[0107] Step 301: Perform physical direct link control channel PSCCH and / or physical direct link shared channel PSSCH transmission on a carrier set; the carrier set is a set of carriers used for carrier aggregation.

[0108] Specifically, in an embodiment of the present application, the first terminal performs PSCCH and / or PSSCH transmission on a carrier set, and the second terminal performs PSCCH and / or PSSCH reception on a carrier set, where the carrier set is a set of carriers used for carrier aggregation.

[0109] In some embodiments, in carrier aggregation, the time slots that may belong to the resource pool on different carriers are exactly the same, and the time slots (or logical time slots) configured by the resource pools on different carriers are exactly the same. This condition is the premise to ensure that the PSFCH resources on different carriers can be kept consistent. The PSFCH resources mentioned here are kept consistent, which means that the resource pools on different carriers are configured with the same time slots of PSFCH resources. The consistency of PSFCH resources on different carriers can reduce the impact of half-duplex. Therefore, in carrier aggregation, the carrier set satisfies one or more of the following conditions:

[0110] The subcarrier spacing of any carrier in the carrier set is the same;

[0111] The through link synchronization signal block S-SSB period of any carrier configuration in the carrier set is the same;

[0112] The number of S-SSB time slots configured for any carrier in the carrier set is the same;

[0113] The S-SSB time slot position of any carrier configuration in the carrier set is the same;

[0114] The uplink time domain resources configured on any carrier in the carrier set are the same;

[0115] The downlink time domain resources configured on any carrier in the carrier set are the same;

[0116] The physical direct link feedback channel PSFCH resource period in the resource pool on any carrier in the carrier set is the same;

[0117] The bitmap for configuring time domain resources in the resource pool on any carrier in the carrier set is the same;

[0118] The first type of time slots on any carrier in the carrier set are the same, wherein the first type of time slots are all time slots excluding time slots configured with S-SSB, time slots unavailable for direct link transmission, and reserved time slots.

[0119] In an embodiment of the present application, the bitmap for configuring time domain resources in the resource pool on any carrier in the carrier set is the same, including that the bitmap length for configuring time domain resources in the resource pool on any carrier in the carrier set is the same and the bitmap value for configuring time domain resources in the resource pool on any carrier in the carrier set is the same, and the same first-class time slots means that the number and position of the first-class time slots are the same.

[0120] By excluding three special time slots, namely, time slots configured with S-SSB, time slots with less than X consecutive available UL symbols (i.e., time slots unavailable for direct link transmission), and reserved time slots, the time slots that may belong to the resource pool (i.e., the first type of time slots) are determined. The first type of time slots represent time slots that may be configured for the resource pool, but whether they specifically belong to the resource pool depends on the Bitmap configuration. Then, the time slots that belong to the resource pool (i.e., logical time slots) are determined by Bitmap indication, where the Bitmap period is repeated according to the logical time slot period, and the time slots with a Bitmap of 1 represent available time slots in the resource pool (time slots that belong to the resource pool), and the Bitmap of 0 represent unavailable time slots in the resource pool (time slots that do not belong to the resource pool).

[0121] Figure 4 is a schematic diagram of indicating logical time slots by means of Bitmap provided in an embodiment of the present application, such as Figure 4 As shown, it is assumed that only the S-SSB time slots need to be excluded when determining the time slots that may belong to the resource pool. After excluding the S-SSB time slots, the first type of time slots can be determined. Then the time slots with a bitmap of 0 in the first type of time slots represent unavailable time slots in the current resource pool. When configuring the resource pool on the two carriers, the length of the bitmap is 16 and the bitmap value is the same, so the available time slots corresponding to the resource pools on the two carriers are exactly the same.

[0122] Then the PSFCH resources in the resource pools on the two carriers are configured with the same period (the unit of the period is the time slot in the resource pool, i.e., the logical time slot), so that the PSFCH resources corresponding to the two resource pools can be guaranteed to be consistent in the time domain. The starting time slot for configuring the PSFCH resources in each resource pool is the first time slot in the resource pool. For example, the time slots for configuring the PSFCH resources are Slot#0, Slot#N, Slot#2N, etc. in the resource pool, where N represents the PSFCH resource configuration period.

[0123] The resource pool is used at least for PSCCH and / or PSSCH transmission and reception, and / or for sending and receiving HARQ-ACK information.

[0124] Step 302: Determine a first action according to the received related hybrid automatic repeat request acknowledgment HARQ-ACK information.

[0125] Specifically, in an embodiment of the present application, the second terminal determines HARQ-ACK information based on the decoding of the PSCCH and / or PSSCH sent by the first terminal and performs PSFCH transmission, which is used to carry HARQ-ACK information, and then the first terminal receives the HARQ-ACK information sent by the second terminal and determines the first behavior of the first terminal based on the received HARQ-ACK information. Receiving the HARQ-ACK information sent by the second terminal here includes receiving the ACK information sent by the second terminal, receiving the NACK information sent by the second terminal, or supporting HARQ feedback but not receiving any HARQ-ACK (ACK or NACK) information sent by the second terminal.

[0126] The second terminal determines different HARQ-ACK information according to different decoding conditions of the PSCCH and / or PSSCH sent by different first terminals, and the first terminal determines the first behavior according to the (corresponding) HARQ-ACK information related to the received PSCCH and / or PSSCH. For example, the related (corresponding) HARQ-ACK information 1 is determined according to PSCCH1 and / or PSSCH1, and the related (corresponding) HARQ-ACK information 2 is determined according to PSCCH2 and / or PSSCH2.

[0127] The first behavior is used to indicate the transmission mode of the related (corresponding) PSCCH and / or PSSCH. For example, the first behavior may be whether the PSCCH and / or PSSCH transmission is the last transmission on the first carrier; the first behavior may also be whether the PSCCH and / or PSSCH transmission is the last PSCCH and / or PSSCH transmission on the carrier set.

[0128] The transmission method under multi-carrier applicable to a direct link provided in an embodiment of the present application performs PSCCH and / or PSSCH transmission on a set of carriers used for carrier aggregation, and determines a first behavior based on the received related HARQ-ACK information, thereby avoiding the problem that the existing HARQ feedback mechanism cannot be applied to multi-carrier situations.

[0129] In some embodiments, determining the first behavior based on the received related HARQ-ACK information includes:

[0130] When the first condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last PSCCH and / or PSSCH transmission on the carrier set;

[0131] The first condition is that a second behavior exists on at least one carrier in the carrier set;

[0132] The second behavior includes at least one of the following:

[0133] When the direct link control information SCI supports NACK-only feedback, no negative NACK feedback is received for the PSCCH and / or PSSCH transmission;

[0134] Positive ACK feedback is received for the PSCCH and / or PSSCH transmission.

[0135] Specifically, in the embodiment of the present application, the PSSCH on any carrier in the carrier set transmits the same MAC PDU / data.

[0136] When the first condition is met, subsequent retransmission of the same TB on any carrier in the carrier set may be canceled.

[0137] Figure 5 is a schematic diagram of the first behavior provided in the embodiment of the present application, such as Figure 5 As shown in the figure, the UE transmits the same MAC PDU on carrier 1 and carrier 2. After the initial transmission of carrier 1 is completed, the UE receives ACK feedback on the PSFCH resource corresponding to the initial transmission, indicating that the receiving end has successfully received it. And considering that the data transmitted on carrier 1 and carrier 2 are the same, it is considered that the initial transmission on carrier 1 is the last transmission of the MAC PDU on all carriers, that is, the retransmission of carrier 1 and the initial transmission on carrier 2 can be canceled.

[0138] The transmission method under multi-carrier applicable to a direct link provided in an embodiment of the present application, when the same MAC PDU / data is transmitted on any carrier in a carrier set, when the first condition is met, the MAC PDU transmission is determined to be the last transmission on the carrier set, thereby avoiding the problem that the existing HARQ feedback mechanism cannot be directly applied to the multi-carrier situation.

[0139] In some embodiments, determining the first behavior based on the received related HARQ-ACK information includes:

[0140] When the second condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last transmission on the first carrier; the first carrier is one or more carriers in the carrier set and the PSCCH and / or PSSCH transmission is on the first carrier;

[0141] The second condition is that a third behavior exists on the first carrier;

[0142] The third behavior includes at least one of the following:

[0143] When the SCI supports NACK-only feedback, no NACK feedback is received for the PSCCH and / or PSSCH transmission;

[0144] An ACK feedback is received for the PSCCH and / or PSSCH transmission.

[0145] Specifically, in the embodiment of the present application, different MAC PDU / data are transmitted on any carrier in the carrier set.

[0146] like Figure 5 As shown in the figure, the UE transmits different MAC PDUs on carrier 1 and carrier 2. After the initial transmission of carrier 1 is completed, the UE receives ACK feedback on the PSFCH resource corresponding to the initial transmission, indicating that the receiving end has successfully received it. And considering that the data transmitted on carrier 1 and carrier 2 are different, it is considered that the initial transmission on carrier 1 is the last transmission of the MAC PDU on carrier 1, that is, the subsequent retransmission of the same TB on carrier 1 can be canceled, and the initial transmission on carrier 2 is transmitted normally.

[0147] The transmission method under multi-carrier applicable to a direct link provided in an embodiment of the present application, when different MAC PDU / data are transmitted on any carrier in a carrier set, when the second condition is met, the transmission of the MAC PDU is determined to be the last transmission on the first carrier, thereby avoiding the problem that the existing HARQ feedback mechanism cannot be directly applied to the multi-carrier situation.

[0148] In some embodiments, the method further comprises:

[0149] In the case where there is a half-duplex conflict problem between PSFCH reception on the first carrier and PSCCH and / or PSSCH transmission on the second carrier, triggering a fourth behavior, wherein the first carrier and the second carrier are different carriers in the carrier set;

[0150] The fourth behavior includes at least one of the following:

[0151] triggering resource reselection of PSCCH and / or PSSCH on the second carrier;

[0152] Determine a fifth behavior based on a priority of the PSFCH on the first carrier, and a priority of the PSCCH and / or PSSCH on the second carrier;

[0153] The PSCCH and / or PSSCH on the second carrier performs partial transmission.

[0154] In some embodiments, determining a fifth behavior based on a priority of the PSFCH on the first carrier and a priority of the PSCCH and / or PSSCH on the second carrier includes:

[0155] If the priority of the PSFCH on the first carrier is higher than the priority of the PSCCH and / or PSSCH on the second carrier, abandon the sending of the PSCCH and / or PSSCH on the second carrier;

[0156] and / or,

[0157] If the priority of the PSFCH on the first carrier is lower than the priority of the PSCCH and / or PSSCH on the second carrier, the PSFCH reception on the first carrier is abandoned.

[0158] Specifically, in the embodiments of the present application, taking into account the different PSFCH periods or inconsistent SCS on different carriers, that is, when the carrier set does not meet the conditions in the above embodiments, it will lead to the PSFCH resources on different carriers being misaligned (that is, inconsistent in the time domain). Therefore, receiving PSFCH and sending PSCCH and / or PSSCH at the same time, or sending PSFCH and receiving PSCCH and / or PSSCH at the same time, there will be a half-duplex problem (PSFCH and PSCCH and / or PSSCH are located on different carriers).

[0159] For example, when there is a half-duplex conflict problem between PSFCH reception on the first carrier and PSCCH and / or PSSCH transmission on the second carrier, resource reselection of PSCCH and / or PSSCH on the second carrier is triggered.

[0160] Optionally, until the reselected resources and reception of PSFCH no longer have half-duplex issues.

[0161] For another example, in the case where there is a half-duplex conflict problem between PSFCH reception on the first carrier and PSCCH and / or PSSCH transmission on the second carrier, the behavior of the terminal is determined based on the comparison result between the priority of PSSCH corresponding to PSFCH and the priority corresponding to PSSCH:

[0162] If the priority value of the PSSCH corresponding to the PSFCH is smaller (ie, the priority is larger), the sending of the PSCCH and / or PSSCH is abandoned.

[0163] If the priority value of the PSSCH is smaller (ie, the priority is larger), the PSFCH reception is abandoned.

[0164] If the priority value of the PSSCH corresponding to the PSFCH is smaller (ie, the priority is larger), the reception of the PSCCH and / or PSSCH is abandoned.

[0165] If the priority value of the PSSCH is smaller (ie, the priority is larger), the PSFCH transmission is abandoned.

[0166] For another example, when there is a half-duplex conflict problem between the PSFCH reception on the first carrier and the PSCCH and / or PSSCH transmission on the second carrier, the PSCCH and / or PSSCH on the second carrier performs partial transmission (transmission and / or reception) to ensure that there is no half-duplex problem between the partial transmission of the PSCCH and / or PSSCH and the PSFCH reception.

[0167] Figure 6 Schematic diagram of the inconsistency of PSFCH time domain resources of different carriers provided in the embodiment of the present application, such as Figure 6 As shown in the figure, due to different configurations of resource pools (different SCS, different PSFCH periods, different logical time slots, etc.), the PSFCH periods on different carriers are inconsistent. After the UE performs PSCCH / PSSCH transmission in time slot 1 of carrier 1, it needs to receive HARQ feedback information in time slot 3. At the same time, the UE also needs to perform PSCCH / PSSCH transmission in time slot 3 on carrier 2. Therefore, there will be a half-duplex problem in time slot 3. To solve this problem:

[0168] Solution 1: The UE can perform resource reselection for PSCCH / PSSCH on carrier 2 to avoid the half-duplex problem on different carriers. The reselected resource is located in time slot 4.

[0169] Solution 2: The priority value corresponding to PSSCH on carrier 1 is "1", and the priority value corresponding to PSSCH on carrier 2 is "8", so the priority corresponding to transmission on carrier 1 is higher. That is, it is considered that the priority of PSFCH transmission on carrier 1 in time slot 3 is higher, so the PSCCH / PSSCH transmission on carrier 2 in time slot 3 is cancelled.

[0170] Solution 3: The PSFCH on carrier 1 time slot 3 occupies symbols 11 and 12, and symbol 13 is a GP symbol. At the same time, in order to ensure the time for the transmission and reception conversion, symbol 10 should also be a GP symbol. Therefore, the symbols that can be used for the transmission of PSCCH / PSSCH on carrier 2 time slot 3 are symbols 0 to 9.

[0171] The transmission method under multi-carrier applicable to a direct link provided in an embodiment of the present application performs PSCCH and / or PSSCH transmission on a set of carriers used for carrier aggregation, and determines the first behavior based on the received related HARQ ACK information, thereby avoiding the problem that the existing HARQ feedback mechanism cannot be directly multiplexed in the case of multiple carriers.

[0172] In some embodiments, the method further comprises:

[0173] When performing resource selection for PSCCH and / or PSSCH transmission on the second carrier, excluding all resources on the first time unit in the resource pool;

[0174] The first time unit satisfies one or more of the following conditions:

[0175] The resource pool is not configured with PSFCH resources in the first time unit;

[0176] The third carrier configures PSFCH resources in the first time unit, and the first terminal performs PSFCH reception in the first time unit on the third carrier;

[0177] The second carrier and the third carrier belong to different carriers in the carrier set.

[0178] Specifically, in the embodiment of the present application, the first time unit may be a time slot, a subframe, a symbol, a symbol set, etc.

[0179] The third carrier belongs to the carrier set.

[0180] The transmission method under multi-carrier applicable to a direct link provided in an embodiment of the present application performs PSCCH and / or PSSCH transmission on a set of carriers used for carrier aggregation, and determines the first behavior based on the received related HARQ ACK information, thereby avoiding the problem that the existing HARQ feedback mechanism cannot be directly multiplexed in the case of multiple carriers.

[0181] In some embodiments, the second terminal performs PSFCH transmissions on multiple carriers, including power controlling the PSFCH transmissions.

[0182] The total number of actual PSFCH transmissions on all carriers in the carrier set within a time unit does not exceed a first threshold value, and / or the total actual PSFCH transmission power on all carriers in the carrier set within a time unit does not exceed a second threshold value.

[0183] The first threshold value indicates the maximum number of PSFCH transmissions supported by all carriers in the carrier set within a time unit; the second threshold value indicates the maximum PSFCH transmission power supported by all carriers in the carrier set within a time unit.

[0184] Specifically, the total number of actual PSFCH transmissions on all carriers in the carrier set within a time unit does not exceed the first threshold value, which can be understood as: the total number of PSFCH transmissions simultaneously performed on all carriers in the carrier set does not exceed the first threshold value.

[0185] The sum of actual PSFCH transmission powers on all carriers in the carrier set within a time unit does not exceed the second threshold value, which can be understood as: the total power of PSFCH transmissions performed simultaneously on all carriers in the carrier set does not exceed the second threshold value.

[0186] The first threshold value indicates the maximum number of PSFCH transmissions supported on all carriers in the carrier set within a time unit, which can be understood as follows: the first threshold value indicates the maximum number of PSFCH transmissions performed simultaneously on all carriers in the carrier set.

[0187] The second threshold value indicates the maximum PSFCH transmission power supported by all carriers in the carrier set within a time unit, which can be understood as follows: the second threshold value indicates the maximum power of PSFCH transmission performed simultaneously on all carriers in the carrier set.

[0188] In some embodiments, the performing power control on the PSFCH transmission includes:

[0189] The actual number of PSFCH transmissions and the actual power of each PSFCH transmission are determined based on at least one of the total number of scheduled PSFCH transmissions, the first power value, the first threshold value, and the second threshold value. The first power value represents a theoretical single PSFCH transmission power value determined, and the specific reference may be made to P defined in Section 16.2.3 of 3GPP TS 38.214. PSFCH,one .

[0190] If the total number of scheduled PSFCH transmissions is less than or equal to the first threshold value, and if the first power value is used as the single PSFCH transmission power, the calculated sum of the scheduled PSFCH transmission powers (equal to the total number of scheduled PSFCH transmissions multiplied by the first power value) is less than or equal to the second threshold value, then the second terminal determines that the actual number of PSFCH transmissions is equal to the total number of scheduled PSFCH transmissions, and the actual power of each PSFCH transmission is equal to the first power value.

[0191] For example, the maximum total number of PSFCH transmissions supported on all carriers of carrier aggregation is: 4.

[0192] Maximum total PSFCH transmission power supported on all carriers of carrier aggregation: 23dBm.

[0193] Theoretical single PSFCH transmission power: 17dBm.

[0194] Number of PSFCH transmissions scheduled on all carriers of carrier aggregation: 3.

[0195] Because 3 is less than 4 and 17+10*log10(3)=21.77dBm<23dBm, the number of PSFCH transmissions that can actually be supported is 3, and the actual single PSFCH transmission power is 17dBm.

[0196] If the total number of scheduled PSFCH transmissions is less than or equal to the first threshold value, and if the first power value is used as the single PSFCH transmission power, the sum of the scheduled PSFCH transmission powers calculated (equal to the total number of scheduled PSFCH transmissions multiplied by the first power value) is greater than the second threshold value, then the second terminal can determine M transmissions from the scheduled PSFCH transmissions in order from high to low priority based on the PSFCH transmission priority, where M is the number of PSFCH transmissions with a priority in the first priority interval, and the following conditions need to be met: the total power of the M PSFCH transmissions calculated using the first power value as the single PSFCH transmission power is less than or equal to the second threshold value. The actual number of PSFCH transmissions supported by the second terminal is the maximum value of all M determined above, and the actual PSFCH transmission power is the smaller value between the average single PSFCH transmission power determined by the actual number of PSFCH transmissions determined and the second threshold value (equal to the second threshold value divided by the actual number of PSFCH transmissions supported by the second terminal), and the first power value.

[0197] For example, the maximum total number of PSFCH transmissions supported on all carriers of carrier aggregation is: 4.

[0198] Maximum total PSFCH transmission power supported on all carriers of carrier aggregation: 23dBm.

[0199] Theoretical single PSFCH transmission power: 20dBm.

[0200] Number of PSFCH transmissions scheduled on all carriers of carrier aggregation: 3.

[0201] Because 3 is less than 4 but 20+10*log10(3)=24.77dBm>23dBm, then the number of PSFCH transmissions corresponding to the priority value 1 is 1, the number of PSFCH transmissions corresponding to the priority value 2 is 1, and the number of PSFCH transmissions corresponding to the priority value 3 is 3. According to the priorities 1 and 2, 2 transmissions can be determined, but 20+10*log10(2)=23.01dBm>23dBm, according to the priority 1, 1 transmission can be determined, and 20+10*log10(1)=20dBm<23dBm, the single PSFCH transmission power determined according to 1 transmission and the maximum PSFCH transmission power is 23dBm. Therefore, the actual number of PSFCH transmissions supported is 1, and the actual PSFCH transmission power is min{23dBm,20dBm}=20dBm.

[0202] If the total number of scheduled PSFCH transmissions is greater than the first threshold value, the second terminal selects the first threshold value PSFCH transmissions with higher priority from the scheduled PSFCH transmissions. If the first power value is used as the single PSFCH transmission power, and the calculated total power of the first threshold value PSFCH transmissions is less than or equal to the second threshold value, the second terminal determines that the actual number of PSFCH transmissions is equal to the first threshold value, and the actual power of each PSFCH transmission is equal to the first power value.

[0203] For example, the maximum total number of PSFCH transmissions supported on all carriers of carrier aggregation is: 3.

[0204] Maximum total PSFCH transmission power supported on all carriers of carrier aggregation: 23dBm.

[0205] Theoretical single PSFCH transmission power: 17dBm.

[0206] Number of PSFCH transmissions scheduled on all carriers of carrier aggregation: 5.

[0207] Because 5 is greater than 3 but 17+10*log10(3)=21.77dBm<23dBm, the number of PSFCH transmissions that can actually be supported is 3, and the actual single PSFCH transmission power is 17dBm.

[0208] If the total number of scheduled PSFCH transmissions is greater than the first threshold value, the second terminal selects the first threshold value PSFCH transmissions with higher priority from the scheduled PSFCH transmissions. If the first power value is used as the single PSFCH transmission power, and the total power of the first threshold value PSFCH transmissions calculated is greater than the second threshold value, the second terminal determines based on the PSFCH transmission priority, and determines M transmissions from the scheduled PSFCH transmissions in order from high to low priority, where M is the number of PSFCH transmissions with priority in the first priority interval, and the following conditions need to be met: the first power value is used as the single PSFCH transmission power, and the total power of the M transmissions calculated is less than or equal to the second threshold value. The actual number of PSFCH transmissions supported by the second terminal is the maximum value of all M determined above, and the actual PSFCH transmission power is the smaller value between the average single PSFCH transmission power determined by the actual number of PSFCH transmissions determined and the second threshold value (equal to the second threshold value divided by the actual number of PSFCH transmissions supported by the second terminal), and the first power value.

[0209] For example, the maximum total number of PSFCH transmissions supported on all carriers of carrier aggregation is: 3.

[0210] Maximum total PSFCH transmission power supported on all carriers of carrier aggregation: 23dBm.

[0211] Theoretical single PSFCH transmission power: 20dBm.

[0212] Number of PSFCH transmissions scheduled on all carriers of carrier aggregation: 4.

[0213] Because 4 is greater than 3 but 20+10*log10(3)=24.77dBm>23dBm, then the number of PSFCH transmissions corresponding to the priority value 1 is 1, the number of PSFCH transmissions corresponding to the priority value 2 is 2, and the number of PSFCH transmissions corresponding to the priority value 3 is 3. According to the priorities 1 and 2, 3 transmissions can be determined, but 20+10*log10(3)=24.77dBm>23dBm, according to the priority 1, 1 transmission can be determined, and 20+10*log10(1)=20dBm<23dBm, the single PSFCH transmission power determined according to 1 transmission and the maximum PSFCH transmission power is 23dBm. Therefore, the actual number of PSFCH transmissions supported is 1, and the actual PSFCH transmission power is min{23dBm,20dBm}=20dBm.

[0214] The embodiments of the present application provide a HARQ feedback mechanism applicable to multi-carrier situations, including the configuration of a resource pool, a method for processing received HARQ feedback information, and PSFCH transmission power control in multi-carrier situations, which can effectively reduce problems such as half-duplex and effectively improve transmission efficiency and reliability.

[0215] Figure 7 This is a second flow chart of a transmission method under multi-carriers applicable to a direct link provided in an embodiment of the present application, such as Figure 7 As shown, the embodiment of the present application provides a transmission method under multi-carrier applicable to a direct link, and the execution subject thereof may be a second terminal, such as a vehicle-mounted terminal, a mobile phone, etc. The method includes:

[0216] Step 701: Perform PSCCH and / or PSSCH reception on a carrier set; the carrier set is a set of carriers used for carrier aggregation;

[0217] Step 702: Determine HARQ-ACK information according to the received PSCCH and / or PSSCH, and perform PSFCH transmission, where the PSFCH transmission is used to carry the HARQ-ACK information.

[0218] In some embodiments, the method further comprises:

[0219] The total number of PSFCH transmissions on all carriers in the carrier set within a time unit does not exceed a first threshold value, and / or the total PSFCH transmission power on all carriers in the carrier set within a time unit does not exceed a second threshold value;

[0220] The first threshold value represents the maximum number of PSFCH transmissions supported by all carriers in the carrier set within a time unit; the second threshold value represents the maximum PSFCH transmission power supported by all carriers in the carrier set within a time unit.

[0221] In some embodiments, the method further comprises:

[0222] The PSFCH transmission number and the PSFCH transmission power are determined based on at least one of the total number of scheduled PSFCH transmissions, a first power value, the first threshold value, and the second threshold value.

[0223] Specifically, the transmission method under multi-carrier applicable to a direct link provided in an embodiment of the present application can refer to the above-mentioned transmission embodiment under multi-carrier applicable to a direct link in which the execution subject is the first terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the above-mentioned corresponding method embodiments will not be described in detail here.

[0224] Figure 8 is a schematic diagram of the structure of a first terminal provided in an embodiment of the present application, such as Figure 8 As shown, the first terminal includes a memory 820, a transceiver 800, and a processor 810, wherein:

[0225] The memory 820 is used to store computer programs; the transceiver 800 is used to send and receive data under the control of the processor 810; the processor 810 is used to read the computer program in the memory 820 and perform the following operations:

[0226] Performing physical direct link control channel PSCCH and / or physical direct link shared channel PSSCH transmission on a carrier set; the carrier set is a set of carriers used for carrier aggregation;

[0227] The first behavior is determined according to the received related hybrid automatic repeat request acknowledgement HARQ-ACK information.

[0228] Among them, Figure 8 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 810 and various circuits of memory represented by memory 820 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 800 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium includes a wireless channel, a wired channel, an optical cable, and other transmission media. For different user devices, the user interface 830 may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0229] The processor 810 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 810 when performing operations.

[0230] In some embodiments, the processor 810 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD), and the processor may also adopt a multi-core architecture.

[0231] The processor calls the computer program stored in the memory to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0232] In some embodiments, the carrier set satisfies one or more of the following conditions:

[0233] The subcarrier spacing of any carrier in the carrier set is the same;

[0234] The through link synchronization signal block S-SSB period of any carrier configuration in the carrier set is the same;

[0235] The number of S-SSB time slots configured for any carrier in the carrier set is the same;

[0236] The S-SSB time slot positions of any carrier configurations in the carrier set are the same;

[0237] The uplink time domain resources configured on any carrier in the carrier set are the same;

[0238] The downlink time domain resources configured on any carrier in the carrier set are the same;

[0239] The physical direct link feedback channel PSFCH resource period in the resource pool on any carrier in the carrier set is the same;

[0240] The bitmap for configuring time domain resources in the resource pool on any carrier in the carrier set is the same;

[0241] The first type of time slots on any carrier in the carrier set are the same, wherein the first type of time slots are all time slots excluding time slots configured with S-SSB, time slots unavailable for direct link transmission, and reserved time slots.

[0242] In some embodiments, determining the first behavior based on the received related HARQ-ACK information includes:

[0243] When the first condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last PSCCH and / or PSSCH transmission on the carrier set;

[0244] The first condition is that a second behavior exists on at least one carrier in the carrier set;

[0245] The second behavior includes at least one of the following:

[0246] When the direct link control information SCI supports NACK-only feedback, no negative NACK feedback is received for the PSCCH and / or PSSCH transmission;

[0247] Positive ACK feedback is received for the PSCCH and / or PSSCH transmission.

[0248] In some embodiments, determining the first behavior based on the received related HARQ-ACK information includes:

[0249] When the second condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last transmission on the first carrier; the first carrier is one or more carriers in the carrier set and the PSCCH and / or PSSCH transmission is on the first carrier;

[0250] The second condition is that a third behavior exists on the first carrier;

[0251] The third behavior includes at least one of the following:

[0252] When the SCI supports NACK-only feedback, no NACK feedback is received for the PSCCH and / or PSSCH transmission;

[0253] An ACK feedback is received for the PSCCH and / or PSSCH transmission.

[0254] In some embodiments, the processor is further configured to read the computer program in the memory 820 and perform the following operations:

[0255] In the case where there is a half-duplex conflict problem between PSFCH reception on the first carrier and PSCCH and / or PSSCH transmission on the second carrier, triggering a fourth behavior, wherein the first carrier and the second carrier are different carriers in the carrier set;

[0256] The fourth behavior includes at least one of the following:

[0257] triggering resource reselection of PSCCH and / or PSSCH on the second carrier;

[0258] Determine a fifth behavior based on a priority of the PSFCH on the first carrier, and a priority of the PSCCH and / or PSSCH on the second carrier;

[0259] The PSCCH and / or PSSCH on the second carrier performs partial transmission.

[0260] In some embodiments, determining a fifth behavior based on a priority of the PSFCH on the first carrier and a priority of the PSCCH and / or PSSCH on the second carrier includes:

[0261] If the priority of the PSFCH on the first carrier is higher than the priority of the PSCCH and / or PSSCH on the second carrier, abandon the sending of the PSCCH and / or PSSCH on the second carrier;

[0262] and / or,

[0263] If the priority of the PSFCH on the first carrier is lower than the priority of the PSCCH and / or PSSCH on the second carrier, the PSFCH reception on the first carrier is abandoned.

[0264] In some embodiments, the processor is further configured to read the computer program in the memory and perform the following operations:

[0265] When performing resource selection for PSCCH and / or PSSCH transmission on the second carrier, excluding all resources on the first time unit in the resource pool;

[0266] The first time unit satisfies one or more of the following conditions:

[0267] The resource pool is not configured with PSFCH resources in the first time unit;

[0268] The third carrier configures PSFCH resources in the first time unit, and the first terminal performs PSFCH reception in the first time unit on the third carrier;

[0269] The second carrier and the third carrier belong to different carriers in the carrier set.

[0270] It should be noted here that the above-mentioned first terminal provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is the first terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0271] Fig. 9 is a schematic diagram of the structure of a second terminal provided in an embodiment of the present application, such as Fig. 9 As shown, the second terminal includes a memory 920, a transceiver 900, and a processor 910, wherein:

[0272] The memory 920 is used to store computer programs; the transceiver 900 is used to send and receive data under the control of the processor 910; the processor 910 is used to read the computer program in the memory 920 and perform the following operations:

[0273] Perform PSCCH and / or PSSCH reception on a carrier set; the carrier set is a set of carriers used for carrier aggregation;

[0274] HARQ-ACK information is determined based on the received PSCCH and / or PSSCH, and PSFCH transmission is performed, where the PSFCH transmission is used to carry the HARQ-ACK information.

[0275] Among them, Fig. 9 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 910 and various circuits of memory represented by memory 920 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 900 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium includes a wireless channel, a wired channel, an optical cable, and other transmission media. For different user devices, the user interface 930 may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0276] The processor 910 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 910 when performing operations.

[0277] In some embodiments, the processor 910 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD), and the processor may also adopt a multi-core architecture.

[0278] The processor calls the computer program stored in the memory to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0279] In some embodiments, the method further comprises:

[0280] The total number of PSFCH transmissions on all carriers in the carrier set within a time unit does not exceed a first threshold value, and / or the total PSFCH transmission power on all carriers in the carrier set within a time unit does not exceed a second threshold value;

[0281] The first threshold value represents the maximum number of PSFCH transmissions supported by all carriers in the carrier set within a time unit; the second threshold value represents the maximum PSFCH transmission power supported by all carriers in the carrier set within a time unit.

[0282] In some embodiments, the method further comprises:

[0283] The PSFCH transmission number and the PSFCH transmission power are determined based on at least one of the total number of scheduled PSFCH transmissions, a first power value, the first threshold value, and the second threshold value.

[0284] It should be noted here that the above-mentioned second terminal provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the above-mentioned execution subject is the second terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0285] Fig.10 is one of the structural schematic diagrams of a transmission device under multi-carriers applicable to a direct link provided in an embodiment of the present application, such as Fig.10 As shown, the embodiment of the present application provides a transmission device under multi-carrier applicable to a direct link, including a sending module 1001 and a determining module 1002, wherein:

[0286] The sending module 1001 is used to perform physical direct link control channel PSCCH and / or physical direct link shared channel PSSCH transmission on a carrier set; the carrier set is a carrier used for carrier aggregation; the determining module 1002 is used to determine the first behavior according to the received related HARQ-ACK information.

[0287] In some embodiments, the carrier set satisfies one or more of the following conditions:

[0288] The subcarrier spacing of any carrier in the carrier set is the same;

[0289] The through link synchronization signal block S-SSB period of any carrier configuration in the carrier set is the same;

[0290] The number of S-SSB time slots configured for any carrier in the carrier set is the same;

[0291] The S-SSB time slot positions of any carrier configurations in the carrier set are the same;

[0292] The uplink time domain resources configured on any carrier in the carrier set are the same;

[0293] The downlink time domain resources configured on any carrier in the carrier set are the same;

[0294] The physical direct link feedback channel PSFCH resource period in the resource pool on any carrier in the carrier set is the same;

[0295] The bitmap for configuring time domain resources in the resource pool on any carrier in the carrier set is the same;

[0296] The first type of time slots on any carrier in the carrier set are the same, wherein the first type of time slots are all time slots excluding time slots configured with S-SSB, time slots unavailable for direct link transmission, and reserved time slots.

[0297] In some embodiments, determining the first behavior based on the received related HARQ-ACK information includes:

[0298] When the first condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last PSCCH and / or PSSCH transmission on the carrier set;

[0299] The first condition is that a second behavior exists on at least one carrier in the carrier set;

[0300] The second behavior includes at least one of the following:

[0301] When the direct link control information SCI supports NACK-only feedback, no negative NACK feedback is received for the PSCCH and / or PSSCH transmission;

[0302] Positive ACK feedback is received for the PSCCH and / or PSSCH transmission.

[0303] In some embodiments, determining the first behavior based on the received related HARQ-ACK information includes:

[0304] When the second condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last transmission on the first carrier; the first carrier is one or more carriers in the carrier set and the PSCCH and / or PSSCH transmission is on the first carrier;

[0305] The second condition is that a third behavior exists on the first carrier;

[0306] The third behavior includes at least one of the following:

[0307] When the SCI supports NACK-only feedback, no NACK feedback is received for the PSCCH and / or PSSCH transmission;

[0308] An ACK feedback is received for the PSCCH and / or PSSCH transmission.

[0309] In some embodiments, the method further comprises:

[0310] In the case where there is a half-duplex conflict problem between PSFCH reception on the first carrier and PSCCH and / or PSSCH transmission on the second carrier, triggering a fourth behavior, wherein the first carrier and the second carrier are different carriers in the carrier set;

[0311] The fourth behavior includes at least one of the following:

[0312] triggering resource reselection of PSCCH and / or PSSCH on the second carrier;

[0313] Determine a fifth behavior based on a priority of the PSFCH on the first carrier, and a priority of the PSCCH and / or PSSCH on the second carrier;

[0314] The PSCCH and / or PSSCH on the second carrier performs partial transmission.

[0315] In some embodiments, determining a fifth behavior based on a priority of the PSFCH on the first carrier and a priority of the PSCCH and / or PSSCH on the second carrier includes:

[0316] If the priority of the PSFCH on the first carrier is higher than the priority of the PSCCH and / or PSSCH on the second carrier, abandon the sending of the PSCCH and / or PSSCH on the second carrier;

[0317] and / or,

[0318] If the priority of the PSFCH on the first carrier is lower than the priority of the PSCCH and / or PSSCH on the second carrier, the PSFCH reception on the first carrier is abandoned.

[0319] In some embodiments, the method further comprises:

[0320] When performing resource selection for PSCCH and / or PSSCH transmission on the second carrier, excluding all resources on the first time unit in the resource pool;

[0321] The first time unit satisfies one or more of the following conditions:

[0322] The resource pool is not configured with PSFCH resources in the first time unit;

[0323] The third carrier configures PSFCH resources in the first time unit, and the first terminal performs PSFCH reception in the first time unit on the third carrier;

[0324] The second carrier and the third carrier belong to different carriers in the carrier set.

[0325] Specifically, the above-mentioned transmission device under multi-carrier suitable for a direct link provided in an embodiment of the present application can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the first terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0326] Fig.11 This is a second structural diagram of a transmission device under multi-carriers applicable to a direct link provided in an embodiment of the present application, such as Fig.11 As shown, the embodiment of the present application provides a transmission device under multi-carrier applicable to a direct link, including a receiving module 1101 and a transmission module 1102, wherein:

[0327] The receiving module 1101 is used to perform PSCCH and / or PSSCH reception on a carrier set; the carrier set is a set of carriers used for carrier aggregation; the transmission module 1102 is used to determine HARQ-ACK information based on the received PSCCH and / or PSSCH, and perform PSFCH transmission, and the PSFCH transmission is used to carry HARQ-ACK information.

[0328] In some embodiments, the apparatus further comprises:

[0329] A first control module, configured to control the total number of PSFCH transmissions on all carriers in the carrier set within a time unit not to exceed a first threshold value, and / or the total PSFCH transmission power on all carriers in the carrier set within a time unit not to exceed a second threshold value;

[0330] The first threshold value represents the maximum number of PSFCH transmissions supported by all carriers in the carrier set within a time unit; the second threshold value represents the maximum PSFCH transmission power supported by all carriers in the carrier set within a time unit.

[0331] In some embodiments, the apparatus further comprises:

[0332] The second control module is used to determine the number of PSFCH transmissions and the PSFCH transmission power based on the total number of scheduled PSFCH transmissions, the first power value, the first threshold value, and at least one of the second threshold value.

[0333] Specifically, the above-mentioned transmission device under multi-carrier suitable for a direct link provided in an embodiment of the present application can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the second terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0334] It should be noted that the division of units / modules in the above embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, the functional units in the various embodiments of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated units may be implemented in the form of hardware or in the form of software functional units.

[0335] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the relevant technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program code.

[0336] In some embodiments, a non-transitory readable storage medium is also provided, wherein the non-transitory readable storage medium stores a computer program, wherein the computer program is used to enable a processor to execute the transmission method under multiple carriers applicable to a direct link provided by the above-mentioned method embodiments.

[0337] Specifically, the above-mentioned non-transitory readable storage medium provided in the embodiment of the present application can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects that are the same as the method embodiments in this embodiment will not be described in detail here.

[0338] It should be noted that the non-transitory readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0339] In some embodiments, a processor-readable storage medium is also provided, wherein the processor-readable storage medium stores a computer program, wherein the computer program is used to enable a processor to execute the transmission method under multiple carriers applicable to a direct link provided by the above-mentioned method embodiments.

[0340] Specifically, the processor-readable storage medium provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects that are the same as those in the method embodiments will not be described in detail herein.

[0341] In some embodiments, a computer-readable storage medium is further provided, wherein the computer-readable storage medium stores a computer program, wherein the computer program is used to enable a computer to execute the transmission method under multiple carriers applicable to a direct link provided by the above-mentioned method embodiments.

[0342] Specifically, the above-mentioned computer-readable storage medium provided in the embodiment of the present application can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0343] In some embodiments, a communication device is further provided, in which a computer program is stored, and the computer program is used to enable the communication device to execute the transmission method under multiple carriers applicable to a direct link provided by the above-mentioned method embodiments.

[0344] Specifically, the above-mentioned communication device provided in the embodiment of the present application can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects that are the same as the method embodiments in this embodiment will not be described in detail here.

[0345] In some embodiments, a chip product is further provided, in which a computer program is stored, and the computer program is used to enable the chip product to execute the transmission method under multiple carriers applicable to a direct link provided by the above-mentioned method embodiments.

[0346] Specifically, the above-mentioned chip product provided in the embodiment of the present application can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0347] It should also be noted that the terms "first", "second", etc. in the embodiments of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0348] In the embodiments of the present application, the term "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0349] "Determine B based on A" in the embodiments of the present application means that the factor A should be considered when determining B. It is not limited to "B can be determined based on A alone", but should also include: "Determine B based on A and C", "Determine B based on A, C and E", "Determine C based on A, and further determine B based on C", etc. In addition, it can also include taking A as a condition for determining B, for example, "When A meets the first condition, use the first method to determine B"; for another example, "When A meets the second condition, determine B", etc.; for another example, "When A meets the third condition, determine B based on the first parameter", etc. Of course, it can also be a condition that takes A as a factor for determining B, for example, "When A meets the first condition, use the first method to determine C, and further determine B based on C", etc.

[0350] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0351] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new radio (NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0352] The terminal device involved in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs) and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, and a user device, but is not limited in the embodiments of the present application.

[0353] The network device involved in the embodiment of the present application may be a base station, which may include multiple cells providing services for the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, and serve as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (Global System for Mobile communications, GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (Home evolved Node B, HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., which is not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

[0354] Network devices and terminal devices can each use one or more antennas for multi-input multi-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or it can be diversity transmission, precoding transmission or beamforming transmission, etc.

[0355] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0356] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0357] These processor executable instructions may also be stored in a processor readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0358] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0359] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A transmission method under multi-carrier applicable to a direct link, characterized in that: Applied to the first terminal, comprising: Performing physical direct link control channel PSCCH and / or physical direct link shared channel PSSCH transmission on a carrier set; the carrier set is a set of carriers used for carrier aggregation; The first behavior is determined according to the received related hybrid automatic repeat request acknowledgement HARQ-ACK information.

2. The transmission method under multi-carrier applicable to a direct link according to claim 1, characterized in that: The carrier set satisfies one or more of the following conditions: The subcarrier spacing of any carrier in the carrier set is the same; The through link synchronization signal block S-SSB period of any carrier configuration in the carrier set is the same; The number of S-SSB time slots configured for any carrier in the carrier set is the same; The S-SSB time slot positions of any carrier configurations in the carrier set are the same; The uplink time domain resources configured on any carrier in the carrier set are the same; The downlink time domain resources configured on any carrier in the carrier set are the same; The physical direct link feedback channel PSFCH resource period in the resource pool on any carrier in the carrier set is the same; The bitmap for configuring time domain resources in the resource pool on any carrier in the carrier set is the same; The first type of time slots on any carrier in the carrier set are the same, wherein the first type of time slots are all time slots excluding time slots configured with S-SSB, time slots unavailable for direct link transmission, and reserved time slots.

3. The transmission method under multi-carrier applicable to a direct link according to claim 1, characterized in that: Determining a first behavior according to the received related HARQ-ACK information includes: When the first condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last PSCCH and / or PSSCH transmission on the carrier set; The first condition is that a second behavior exists on at least one carrier in the carrier set; The second behavior includes at least one of the following: When the direct link control information SCI supports NACK-only feedback, no negative NACK feedback is received for the PSCCH and / or PSSCH transmission; Positive ACK feedback is received for the PSCCH and / or PSSCH transmission.

4. The transmission method under multi-carrier applicable to a direct link according to claim 1, characterized in that: Determining a first behavior according to the received related HARQ-ACK information includes: When the second condition is met, the first behavior is to determine that the PSCCH and / or PSSCH transmission is the last transmission on the first carrier; the first carrier is one or more carriers in the carrier set and the PSCCH and / or PSSCH transmission is on the first carrier; The second condition is that a third behavior exists on the first carrier; The third behavior includes at least one of the following: When the SCI supports NACK-only feedback, no NACK feedback is received for the PSCCH and / or PSSCH transmission; An ACK feedback is received for the PSCCH and / or PSSCH transmission.

5. The transmission method under multi-carrier applicable to a direct link according to claim 1, characterized in that: The method further comprises: In the case where there is a half-duplex conflict problem between PSFCH reception on the first carrier and PSCCH and / or PSSCH transmission on the second carrier, triggering a fourth behavior, wherein the first carrier and the second carrier are different carriers in the carrier set; The fourth behavior includes at least one of the following: triggering resource reselection of PSCCH and / or PSSCH on the second carrier; Determine a fifth behavior based on a priority of the PSFCH on the first carrier, and a priority of the PSCCH and / or PSSCH on the second carrier; The PSCCH and / or PSSCH on the second carrier performs partial transmission.

6. The transmission method under multi-carrier applicable to a direct link according to claim 5, characterized in that: Determining a fifth behavior based on a priority of the PSFCH on the first carrier and a priority of the PSCCH and / or PSSCH on the second carrier includes: If the priority of the PSFCH on the first carrier is higher than the priority of the PSCCH and / or PSSCH on the second carrier, abandon the sending of the PSCCH and / or PSSCH on the second carrier; and / or, If the priority of the PSFCH on the first carrier is lower than the priority of the PSCCH and / or PSSCH on the second carrier, the PSFCH reception on the first carrier is abandoned.

7. The transmission method under multi-carrier applicable to a direct link according to claim 1, characterized in that: The method further comprises: When performing resource selection for PSCCH and / or PSSCH transmission on the second carrier, excluding all resources on the first time unit in the resource pool; The first time unit satisfies one or more of the following conditions: The resource pool is not configured with PSFCH resources in the first time unit; The third carrier configures PSFCH resources in the first time unit, and the first terminal performs PSFCH reception in the first time unit on the third carrier; The second carrier and the third carrier belong to different carriers in the carrier set.

8. A transmission method under multi-carrier applicable to a direct link, characterized in that: Applied to the second terminal, including: Perform PSCCH and / or PSSCH reception on a carrier set; the carrier set is a set of carriers used for carrier aggregation; HARQ-ACK information is determined based on the received PSCCH and / or PSSCH, and PSFCH transmission is performed, where the PSFCH transmission is used to carry the HARQ-ACK information.

9. The transmission method under multi-carrier applicable to a direct link according to claim 8, characterized in that: The method further comprises: The total number of PSFCH transmissions on all carriers in the carrier set within a time unit does not exceed a first threshold value, and / or the total PSFCH transmission power on all carriers in the carrier set within a time unit does not exceed a second threshold value; The first threshold value represents the maximum number of PSFCH transmissions supported by all carriers in the carrier set within a time unit; the second threshold value represents the maximum PSFCH transmission power supported by all carriers in the carrier set within a time unit.

10. The transmission method under multi-carrier applicable to a direct link according to claim 9, characterized in that: The method further comprises: The PSFCH transmission number and the PSFCH transmission power are determined based on at least one of the total number of scheduled PSFCH transmissions, a first power value, the first threshold value, and the second threshold value.

11. A first terminal, characterized in that: Including memory, transceiver, processor; Memory for storing computer programs; a transceiver, for transmitting and receiving data under the control of the processor; A processor, configured to read the computer program in the memory and execute the transmission method under multiple carriers applicable to a direct link as described in any one of claims 1 to 7.

12. A second terminal, characterized in that: Including memory, transceiver, processor; Memory for storing computer programs; a transceiver, for transmitting and receiving data under the control of the processor; A processor, configured to read the computer program in the memory and execute the transmission method under multiple carriers applicable to a direct link as described in any one of claims 8 to 10.

13. A transmission device under multi-carrier suitable for a direct link, characterized in that: include: A sending module, used to perform physical direct link control channel PSCCH and / or physical direct link shared channel PSSCH transmission on a carrier set; the carrier set is a carrier used for carrier aggregation; A determination module is used to determine a first behavior according to the received related HARQ-ACK information.

14. A transmission device under multi-carrier suitable for a direct link, characterized in that: include: A receiving module, configured to perform PSCCH and / or PSSCH reception on a carrier set; the carrier set is a set of carriers used for carrier aggregation; A transmission module is used to determine HARQ-ACK information according to the received PSCCH and / or PSSCH, and perform PSFCH transmission, where the PSFCH transmission is used to carry the HARQ-ACK information.

15. A non-transitory readable storage medium, characterized in that: The non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the transmission method under multiple carriers applicable to a direct link as claimed in any one of claims 1 to 10.

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