CN119054377A

CN119054377A - SL communication method, device, apparatus, storage medium, and program product

Info

Publication number: CN119054377A
Application number: CN202280095208.9A
Authority: CN
Inventors: 马腾; 赵振山; 张世昌
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2024-11-29
Also published as: WO2024031463A1

Abstract

The application relates to the technical field of communication. The application discloses a side link SL communication method, a device, equipment, a storage medium and a program product. The communication method comprises the steps that a first terminal sends first information on a first carrier, the first information is used for indicating SL sending conditions on at least one second carrier, and the first carrier and the second carrier are different carriers. The sending end sends the first information on a certain carrier, the first information is used for indicating SL sending conditions on other carriers except the carrier, the receiving end does not need to perform sensing/decoding/blind detection on each carrier, and the SL sending conditions on other carriers can be clarified only by receiving the carrier and the first information, so that the complexity of receiving SL data when the receiving end operates in multiple carriers is greatly reduced, sensing steps are reduced, blind detection complexity is reduced, and electric energy is further saved.

Description

SL communication method, device, apparatus, storage medium, and program product

Technical Field

Embodiments of the present application relate to the field of communications technologies, and in particular, to a SL (Sidelink, side uplink) communication method, apparatus, device, storage medium, and program product.

Background

Carrier aggregation supported by SL communication requires that the UE (User Equipment) perform SL sensing and resource selection on each carrier component independently.

In the related art, for multi-carrier SL communication, the UE needs to receive SL data on all supported carrier components before determining the association therein.

Disclosure of Invention

The embodiment of the application provides a SL communication method, a device, equipment, a storage medium and a program product. The technical scheme is as follows:

according to an aspect of an embodiment of the present application, there is provided a SL communication method, the method including:

the first terminal transmits first information on a first carrier, wherein the first information is used for indicating SL transmission conditions on at least one second carrier, and the first carrier and the second carrier are different carriers.

The second terminal receives first information sent by the first terminal on a first carrier, wherein the first information is used for indicating SL sending conditions on at least one second carrier, and the first carrier and the second carrier are different carriers.

According to an aspect of an embodiment of the present application, there is provided an SL communication apparatus, the apparatus including:

And the sending module is used for sending first information on a first carrier, wherein the first information is used for indicating SL sending conditions on at least one second carrier, and the first carrier and the second carrier are different carriers.

And the receiving module is used for receiving first information sent by the first terminal on a first carrier, wherein the first information is used for indicating SL sending conditions on at least one second carrier, and the first carrier and the second carrier are different carriers.

According to an aspect of the embodiments of the present application, there is provided a terminal device including a processor and a memory, the memory storing a computer program, the processor executing the computer program to implement the SL communication method at the first terminal side or the SL communication method at the second terminal side.

According to an aspect of the embodiments of the present application, there is provided a computer-readable storage medium having stored therein a computer program for execution by a processor to implement the SL communication method at the first terminal side or the SL communication method at the second terminal side.

According to an aspect of an embodiment of the present application, there is provided a chip including a programmable logic circuit and/or program instructions for implementing the SL communication method at the first terminal side or the SL communication method at the second terminal side when the chip is running.

According to an aspect of the embodiments of the present application, there is provided a computer program product including computer instructions stored in a computer-readable storage medium, from which a processor reads and executes the computer instructions to implement the SL communication method at the first terminal side or the SL communication method at the second terminal side.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

The sending end sends the first information on a certain carrier, and the first information is used for indicating SL sending conditions on other carriers except the carrier, so that the receiving end can acquire the SL sending conditions on the other carriers without receiving the information on the other carriers, the complexity of receiving the SL sending information by the receiving end in multi-carrier operation is greatly reduced, the receiving end does not need to perform sensing/decoding/blind detection on each carrier, the SL sending conditions on the other carriers can be clarified only by receiving the carrier and the first information, sensing steps are reduced, the blind detection complexity is reduced, and electric energy is further saved.

Drawings

FIG. 1 is a schematic diagram of a network architecture provided by one embodiment of the present application;

FIG. 2 is a schematic diagram of network coverage inside line communications provided by one embodiment of the present application;

FIG. 3 is a schematic diagram of partial network coverage sidestream communications provided by one embodiment of the present application;

FIG. 4 is a schematic diagram of network coverage outside line communications provided by one embodiment of the present application;

FIG. 5 is a schematic diagram of side-by-side communication with a central control node provided in accordance with one embodiment of the present application;

fig. 6 is a schematic diagram of unicast transmission provided by an embodiment of the present application;

Fig. 7 is a schematic diagram of multicast transmission provided in one embodiment of the present application;

fig. 8 is a schematic diagram of broadcast transmission provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of resource selection provided by one embodiment of the present application;

FIG. 10 is a timing diagram of interception-based resource selection, resource reservation, provided by one embodiment of the present application;

FIG. 11 is a schematic diagram of a slot structure in NR-V2X provided by one embodiment of the present application;

fig. 12 is a schematic diagram of PSSCH transmission provided in one embodiment of the present application;

FIG. 13 is a diagram illustrating a second order SCI mapping scheme provided by one embodiment of the present application;

fig. 14 is a flow chart of a SL communication method according to an embodiment of the present application;

fig. 15 is a schematic diagram of a multi-carrier SL transmission case according to an embodiment of the present application;

fig. 16 is a flowchart of a SL communication method according to another embodiment of the present application;

fig. 17 is a block diagram of a SL communication apparatus provided according to an embodiment of the present application;

Fig. 18 is a block diagram of a SL communication apparatus according to another embodiment of the present application;

fig. 19 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided by the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided by the embodiments of the present application is applicable to similar technical problems.

Referring to fig. 1, a schematic diagram of a network architecture according to an embodiment of the application is shown. The network architecture may comprise a core network 11, an access network 12 and a terminal device 13.

The core network 11 includes a plurality of core network devices. The core network device mainly has the functions of providing user connection, managing users and carrying out service, and is used as an interface for providing a bearing network to an external network. For example, the core network of the 5G (5 th Generation, fifth Generation mobile communication technology) NR (New Radio) system may include an AMF (ACCESS AND Mobility Management Function ) entity, a UPF (User Plane Function, user plane function) entity, an SMF (Session Management Function ) entity, and other devices.

Access network 12 includes a number of access network devices 14 therein. The access network in the 5G NR system may be referred to as NG-RAN (New Generation-Radio Access Network, new Generation radio access network). Access network device 14 is a means deployed in access network 12 to provide wireless communication functionality for terminal device 13. The access network devices 14 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. The names of access network device-capable devices may vary in systems employing different radio access technologies, such as in 5G NR systems, referred to as gNodeB or gNB. As communication technology evolves, the name "access network device" may change. For convenience of description, in the embodiment of the present application, the above-mentioned devices for providing the terminal device 13 with a wireless communication function are collectively referred to as an access network device.

The number of terminal devices 13 is typically a plurality, and one or more terminal devices 13 may be distributed within the cell managed by each access network device 14. The terminal device 13 may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of User Equipment (UE), mobile Station (MS), and the like, having wireless communication functions. For convenience of description, the above-mentioned devices are collectively referred to as terminal devices. The access network device 14 and the core network device communicate with each other via some over-the-air technology, such as the NG interface in a 5G NR system. The access network device 14 and the terminal device 13 communicate with each other via some over-the-air technology, e.g. the Uu interface. In the present application, "terminal device" and "UE" are generally mixed, but it will be understood by those skilled in the art that both generally express the same meaning.

The terminal device 13 and the terminal device 13 (for example, the vehicle-mounted device and other devices (for example, other vehicle-mounted devices, mobile phones, RSUs (Road Side units), etc.) may communicate with each other through a direct communication interface (for example, a PC5 interface), and accordingly, the communication link established based on the direct communication interface may be referred to as a direct link or SL. The SL transmission is that communication data transmission is directly performed between terminal devices through a side uplink, and is different from the traditional cellular system that communication data is received or transmitted through an access network device, and the SL transmission has the characteristics of short time delay, low cost and the like, and is suitable for communication between two terminal devices with geographic positions being close (such as a vehicle-mounted device and other peripheral devices with geographic positions being close). In fig. 1, only vehicle-to-vehicle communication in a V2X (vehicle to everything, internet of vehicles) scene is taken as an example, and the SL technology can be applied to a scene in which communication is directly performed between various terminal devices. Or, the terminal device in the present application refers to any device that communicates using SL technology.

The "5G NR system" in the embodiment of the present application may also be referred to as a 5G system or an NR system, but the meaning thereof will be understood by those skilled in the art. The technical scheme described by the embodiment of the application can be applied to a 5G NR system and also can be applied to a subsequent evolution system of the 5G NR system.

Before describing the technical scheme of the application, a few background technical knowledge related to the application is described. The following related technologies may be optionally combined with the technical solutions of the embodiments of the present application, which all belong to the protection scope of the embodiments of the present application. Embodiments of the present application include at least some of the following.

1. Sidestream communication in different network coverage environments

In the side line communication, according to the network coverage condition of the terminal device for communication, the side line communication can be classified into the network coverage inner line communication, the partial network coverage side line communication and the network coverage outer line communication.

For network coverage inside line communication, as shown in fig. 2, all terminal devices performing side line communication are in the coverage of the same access network device (such as a base station), so that the terminal devices can perform side line communication based on the same side line configuration by receiving configuration signaling of the access network device.

For partial network coverage side-line communication, as shown in fig. 3, a part of terminal equipment for side-line communication is located in the coverage area of access network equipment (such as a base station), and the part of terminal equipment can receive the configuration signaling of the access network equipment and perform side-line communication according to the configuration of the access network equipment. And the terminal device outside the network coverage area cannot receive the Configuration signaling of the access network device, in this case, the terminal device outside the network coverage area determines the sidestream Configuration according to the pre-Configuration information and the information carried in the PSBCH (PHYSICAL SIDELINK Broadcast Channel, physical sidestream broadcast channel) sent by the terminal device inside the network coverage area, so as to perform sidestream communication.

For network coverage outside line communication, as shown in fig. 4, all terminal devices performing side line communication are located outside the network coverage, and all terminal devices determine side line configuration according to pre-configuration information to perform side line communication.

For sidelink communication with a central control node, as shown in fig. 5, a plurality of terminal devices (e.g., UE1, UE2, UE 3) form a communication group, and the communication group is provided with the central control node (e.g., UE 1), which may also be called CH UE (Cluster Header UE, group head user equipment), and the central control node (e.g., UE 1) has at least one of the functions of being responsible for establishment of the communication group, joining/leaving of group members, performing resource coordination, allocating sidelink transmission resources for other terminals, receiving sidelink feedback information of other terminals, performing resource coordination with other communication groups, and the like.

2.D2D/V2X

Unlike conventional cellular systems in which communication data is received or transmitted via access network devices (e.g., base stations), device-to-device communication is a D2D-based side-uplink transmission technique and therefore has higher spectral efficiency and lower transmission delay. The internet of vehicles system adopts a mode of direct communication from terminal device to terminal device, and two transmission modes, namely a mode A and a mode B, are defined in 3GPP (3 rd Generation Partnership Project ).

The mode A is that the transmission resource of the terminal equipment is allocated by the access network equipment, and the terminal equipment transmits communication data on the side link according to the transmission resource allocated by the access network equipment, wherein the access network equipment can allocate the transmission resource of single transmission for the terminal equipment and also can allocate the transmission resource of semi-static transmission for the terminal equipment. As shown in fig. 2, the terminal device is located in the coverage area of the network, and the access network device allocates transmission resources used for side transmission to the terminal device.

And B, the terminal equipment selects transmission resources from the resource pool by itself to transmit communication data. Specifically, the terminal device may select transmission resources from the resource pool by listening, or select transmission resources from the resource pool by randomly selecting. The terminal device is located outside the network coverage area as shown in fig. 4, and autonomously selects transmission resources in a pre-configured resource pool to perform side transmission, or is located within the network coverage area as shown in fig. 2, and autonomously selects transmission resources in the resource pool configured by the network to perform side transmission.

The mode A is referred to as mode 3 in LTE-V2X, mode 1 in NR-V2X, mode 4 in LTE-V2X, and mode 2 in NR-V2X.

3.NR-V2X

In NR-V2X, the terminal devices need to support the function of autopilot, so higher requirements are put on data interaction between the terminal devices, such as higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc.

Broadcast transmission modes are supported in LTE-V2X, and unicast and multicast transmission modes are introduced in NR-V2X. For unicast transmission, the receiving end has only one terminal device, as shown in fig. 6, and unicast transmission is performed between UE1 and UE 2. For multicast transmission, the receiving end is all terminal devices in a communication group, or all terminal devices in a certain transmission distance, as shown in fig. 7, UE1, UE2, UE3 and UE4 form a communication group, where UE1 sends data, and other terminal devices UE2, UE3 and UE4 in the communication group are all terminal devices of the receiving end. For the broadcast transmission mode, the receiving end is any one of the terminal devices around the terminal device of the transmitting end, as shown in fig. 8, UE1 is the terminal device of the transmitting end, and the other terminal devices UE2 to UE6 around it are all the terminal devices of the receiving end.

LTE-V2X interception (SL SENSING) based resource selection

In LTE-V2X, full interception, i.e. the terminal device can intercept data transmitted by other terminal devices in all time slots (or subframes) except for the time slot in which the data is transmitted, or partial interception (PARTIAL SENSING) is for the purpose of terminal device energy saving, the terminal device only needs to intercept part of the time slots (or subframes), and performs resource selection according to the result of partial interception.

When a new data packet arrives at the time n and resource selection is required, the terminal device performs resource selection within [ n+t ₁,n+T ₂ ] milliseconds according to the interception result in the past 1 second, wherein T ₁<＝4;T _2min(prio _TX)≤T ₂ is less than or equal to 100, the selection of T ₁ should be greater than the processing delay of the terminal, and the selection of T ₂ needs to be within the delay requirement range of the service, for example, if the delay requirement of the service is 50ms, 20< = T ₂ < = 50, and the delay requirement of the service is 100ms, 20< = T ₂ < = 100.

As shown in fig. 9, the process of selecting resources in the selection window by the terminal device is as follows:

(1) The terminal device takes all available resources in the selection window as a set a.

(2) If the terminal equipment does not sense the result in some subframes in the sensing window, the resources of the subframes corresponding to the subframes in the selection window are eliminated;

(3) If the terminal device detects PSCCH (PHYSICAL SIDELINK Control Channel) in the listening window, measuring RSRP (REFERENCE SIGNAL RECEIVED Power ) of PSSCH (PHYSICAL SIDELINK SHARED CHANNEL, physical side-line shared Channel) scheduled by the PSCCH, if the measured PSSCH-RSRP is higher than the PSSCH-RSRP threshold, determining whether the reserved transmission resource and data to be transmitted have resource conflict according to the reserved information in the Control information, and if so, removing the resource in the set A. The PSSCH-RSRP threshold is selected according to the priority information carried in the detected PSCCH and the priority of the data to be transmitted by the terminal equipment.

(4) If the number of the remaining resources in the set A is less than 20% of the total number of resources, the terminal device can raise the threshold of PSSCH-RSRP by 3dB, and repeat the steps (1) - (3) until the number of the remaining resources in the set A is greater than 20% of the total number of resources.

(5) The terminal equipment detects the S-RSSI (SIDELINK RECEIVED SIGNAL STRENGTH Indicator of received signal field intensity) of the rest resources in the set A, sorts the resources according to the energy level, and puts the resources with the lowest energy (relative to the number of the resources in the set A) into the set B.

(6) The terminal device selects a resource from the set B with medium probability for data transmission.

Side-link multicarrier transmission in LTE-V2X

In resource selection modes 3 and 4 of LTE V2X, when there is time domain overlapping between transmission of a side uplink of a terminal device on one carrier and transmission of other carriers, and the total transmission power of these carriers exceeds p_cmax (the maximum transmission power predefined by the terminal), the terminal device should adjust the transmission power, and in transmission of multiple side uplinks of multiple carriers, SCI (Sidelink Control Information, side control information) of each transmission includes an information field of priority, the higher the value of the priority information field, the lower the value, the higher the priority, and the terminal device adjusts the transmission power of the side uplink of the lowest priority (the priority value is the maximum), so as to ensure that the total transmission power of multiple carriers does not exceed p_cmax. If the total power of the transmission of the terminal device on the multi-carrier is still higher than the p_cmax, the terminal device should discard the side-link transmission on the carrier with the lowest priority (the highest priority value), and if the total power of the transmission is still higher than the p_cmax, the operation is repeated according to the above steps on the remaining carriers. When there are side-link transmissions on two or more carriers, with the same priority, the protocol is not canonical and the terminal device implements itself the decision of which carrier to adjust the side-link transmission.

NR-V2X snoop-based resource selection

Similar to LTE-V2X mode 4, the resource selection algorithm of NR-V2X mode 2 is also divided into two main steps, namely, the terminal device first determines a candidate resource set, and then selects resources from the candidate resource set to transmit data. A timing diagram of the listening-based resource selection, resource reservation in NR V2X is given in fig. 10. NR-V2X mode 2 is similar to the resource selection mechanism of LTE-V2X mode 4, but differs in several points:

The periodic reservation between TBs (Transport blocks) in NR-V2X may be activated or deactivated in units of resource pools, where both cases determine whether there is a reserved time domain for resources in the first-order SCI received by the terminal device, and whether the terminal device is to periodically reserve the selected time-frequency resources. These enable the design of NR-V2X mode 2 to cover both active and inactive periodic reservations.

NR-V2X needs to support a large number of aperiodic services, and the average SL-RSSI is calculated by taking the average after periodic measurement at a certain time interval, so NR-V2X mode 2 cancels the step of ordering the resources according to the average SL-RSSI after the resource exclusion in LTE-V2X.

NR-V2X mode 2 is more flexible than LTE-V2X mode 4, for example, according to the comparison of SL-RSRP of PSSCH and/or PSCCH and RSRP threshold value, X in X-M _total can be one of {20,35,50}, possible values of resource reservation time domain comprise 1-99 ms, length of resource listening window can be 100 or 1100 ms, etc.

Due to the increase of retransmission times in NR-V2X and the introduction of HARQ (Hybrid Automatic Repeat Request ) feedback, in step 2 of NR-V2X mode 2, the terminal device needs to satisfy some time-domain restrictions when determining several transmission resources in the candidate resource set.

The NR-V2X supports the terminal equipment to use at most two antenna ports to transmit data, and when PSSCH adopts two-port transmission, the SL-RSRP is the sum of SL-RSRP measured by each port.

NR-V2X system frame structure

The slot structure in NR-V2X is shown in FIG. 11.

Fig. 11 (a) shows a slot structure excluding PSFCH (PHYSICAL SIDELINK Feedback Channel) in a slot, and fig. 11 (b) shows a slot structure including PSFCH.

As shown in fig. 11 (a), when PSFCH is not included in the slot, PSCCH in NR-V2X occupies 2 or 3 OFDM (Orthogonal Frequency Division Multiplexing ) symbols from the second sidelink symbol of the slot in the time domain, and {10,12, 15,20,25} PRBs (Physical Resource Block, physical resource blocks) may be occupied in the frequency domain. In order to reduce the complexity of blind detection of the PSCCH by the terminal device, only one PSCCH symbol number and PRB number are allowed to be configured in one resource pool. In addition, because the sub-channel is the minimum granularity of PSSCH resource allocation in NR-V2X, the number of PRBs occupied by the PSCCH must be less than or equal to the number of PRBs contained in one sub-channel in the resource pool, so as not to cause additional limitation on PSSCH resource selection or allocation. The PSSCH also starts in the time domain from the second side symbol of the slot, the last time domain symbol in the slot being a GP (Guard period) symbol, the remaining symbols mapping the PSSCH. The first side symbol in the slot is a repetition of the second side symbol, and typically the receiving end terminal uses the first side symbol as an AGC (Automatic Gain Control ) symbol, the data on which is not typically used for data demodulation. The PSSCH occupies K subchannels in the frequency domain, each comprising N consecutive PRBs.

As shown in fig. 11 (b), when PSFCH channels are included in a slot, the penultimate and penultimate symbols in the slot are used as PSFCH channel transmission, and one time domain symbol before PSFCH channel is used as GP symbol.

8.Sidelink PSSCH

In NR-V2X PSSCH is used to carry second order SCI and data information. The second-order SCI adopts Polar coding mode, and the second-order SCI is fixedly modulated by QPSK (Quadrature PHASE SHIFT KEYING). The data portion of the PSSCH employs LDPC (Low DENSITY PARITY CHECK, low density parity check code) with a supported highest modulation order of 256QAM (Quadrature Amplitude Modulation ).

In NR-V2X, PSSCH supports at most two streams transmission, and data on two layers is mapped to two antenna ports using a unit precoding matrix, and only one TB can be transmitted at most in one PSSCH. However, unlike the transmission mode of the PSSCH data portion, when the PSSCH adopts the dual-stream transmission mode, modulation symbols transmitted by the second-stage SCI on the two streams are identical, and thus the design can ensure the reception performance of the second-stage SCI under the high correlation channel.

Since the maximum number of retransmissions of one PSSCH in NR-V2X is 32, if PSFCH resources exist in the resource pool and the configuration period of PSFCH resources is 2 or 4, the available OFDM symbols in the slot where different transmissions of one PSSCH are located may change, as shown in fig. 12. If calculated according to the real OFDM symbol number in a time slotQ '_SCI2 may be different due to the different number of symbols available for PSSCH transmission in one slot, while a change in Q' _SCI2 may result in a change in the size of the TB carried by the PSSCH, as described below. In order to ensure that TBS remains unchanged in PSSCH multiple transmissions, the method comprises the steps ofThe actual PSFCH symbols are not used, and are calculatedAt this time, PSSCH DMRS (Demodulation REFERENCE SIGNAL) of the number of REs (Resource elements) occupied by the Demodulation Reference Signal (RS) that may change during the retransmission process and the number of REs occupied by the PT-RS (Phase-TRACKING REFERENCE SIGNAL) are not taken into consideration.

As shown in fig. 13, the code rate of the second-order SCI can be dynamically adjusted within a certain range, and the specifically adopted code rate is indicated by the first-order SCI, so that the receiving end does not need to perform blind detection on the second-order SCI even after the code rate is changed. The modulation symbol of the second-order SCI is mapped from the symbol where the first PSSCH DMRS is located in a mode of frequency-first domain and time-last domain, and the second-order SCI is mapped to REs not occupied by the DMRS on the OFDM symbol where the DMRS is located.

The data portion of the PSSCH in one resource pool can employ a plurality of different MCS (Modulation and Coding Scheme, modulation and coding strategy) tables, including a conventional 64QAM MCS table, a 256QAM MCS table, and a low spectral efficiency 64QAM MCS table, with the MCS table specifically employed in a transmission being indicated by the "MCS table indication" field in the first order SCI. In order to control the PAPR (Peak-to-Average Power Ratio, peak-to-average ratio), the PSSCH must be transmitted using consecutive PRBs, which requires that the PSSCH must occupy consecutive subchannels since the subchannels are the minimum frequency domain resource granularity of the PSSCH.

In the related art, carrier aggregation supported by SL requires that the terminal device perform SL sensing on each carrier component independently, which requires that the terminal device must include multiple carrier components and even all carrier components that may be supported when sensing and receiving SL, which is a very high requirement for sensing capability and receiving capability of the terminal device, not only increases sensing/receiving complexity, but also consumes electricity. And meanwhile, the half duplex problem of the terminal equipment (the terminal equipment cannot receive when transmitting and cannot transmit when receiving) is considered, so that the perception/receiving effect is greatly influenced. In addition, the terminal device independently performs resource selection on each carrier component, and the time difference between the selected resources on each carrier component is different, but the time delay cannot be guaranteed although the system capacity and the peak rate can be improved. Finally, SL transmissions on multiple carrier components are not associated with each other with explicit indication information, which presents a great inconvenience for the perception or reception of the terminal device, since the terminal device needs to receive all the SL data on all supported carrier components, decode them before knowing the association therein, and then combine them. Therefore, the application provides a SL communication method, wherein a transmitting end transmits SL transmission information on at least one other carrier on a certain carrier, so that a receiving end can acquire SL transmission conditions on other carriers without sensing/receiving SL data on other carriers.

Referring to fig. 14, a flowchart of a SL communication method according to an embodiment of the present application is shown. The method can be applied to the network architecture shown in fig. 1, and the method can comprise the following steps:

In step 1410, the first terminal sends first information on a first carrier, where the first information is used to indicate a SL transmission situation on at least one second carrier, and the first carrier and the second carrier are different carriers.

The first carrier may be any carrier, and the first carrier is used to carry the first information. The second carrier is a carrier different from the first carrier, and the number of the second carriers may be one or plural (i.e., two or more).

In some embodiments, the first terminal transmits first information on a first carrier, the first information indicating SL transmission on a second carrier. Illustratively, as shown in fig. 15, assuming that cc#1 is a first carrier and cc#2 is a second carrier, the first terminal transmits first information on cc#1, the first information being used to indicate a SL transmission case on cc#2.

In some embodiments, the first terminal transmits first information on a first carrier, the first information indicating SL transmissions on at least two second carriers. Illustratively, as shown in fig. 15, assuming that cc#1 is a first carrier, cc#2, cc#3, and cc#4 are all second carriers, the first terminal transmits first information on cc#1, the first information being used to indicate SL transmission cases on cc#2, cc#3, and cc#4.

In some embodiments, the first information includes at least one of a list of indexes of the second carriers in an active state, a BWP (bandwidth WIDTH PART, partial bandwidth) index corresponding to at least one second carrier, a resource pool index corresponding to at least one second carrier, a time domain offset corresponding to at least one second carrier, a frequency domain offset corresponding to at least one second carrier, a SL transmission resource reservation period corresponding to at least one second carrier, a parameter set corresponding to at least one second carrier, and resource pool information available on at least one second carrier. The above index may also be referred to as an ID (Identifier), and both have the same meaning.

The first terminal may send first information on a first carrier, the first information indicating an index list of a second carrier in an active state.

The first terminal may send first information on a first carrier, where the first information is used to indicate a BWP index corresponding to at least one second carrier. The BWP is a subset over the entire bandwidth, and each BWP is a set of consecutive PRBs (Physical Resource Block, physical resource blocks) under given carrier and given Numerology (proposition) conditions.

The first terminal sends first information on a first carrier, where the first information is used to indicate a resource pool index corresponding to at least one second carrier. The resource pool is a set of resources, and the resource pool of the side link is a set of time-frequency resources for side transmission.

The first terminal may send first information on a first carrier, where the first information is used to indicate a time domain offset corresponding to at least one second carrier. As shown in fig. 15, let cc#1 be the first carrier, and cc#2, cc#3, and cc#4 be the second carrier. The time domain offset corresponding to the second carrier refers to an offset between a time domain start position corresponding to the second carrier and a time domain start position corresponding to the first carrier.

The first terminal may send first information on a first carrier, where the first information is used to indicate a frequency domain offset corresponding to at least one second carrier. As shown in fig. 15, let cc#1 be the first carrier, and cc#2, cc#3, and cc#4 be the second carrier. The frequency domain offset corresponding to the second carrier refers to an offset between a frequency domain start position corresponding to the second carrier and a frequency domain start position corresponding to the first carrier.

The first terminal may send first information on a first carrier, where the first information is used to indicate a SL transmission resource reservation period corresponding to at least one second carrier. The above-mentioned transmission resource reservation period may be set according to a TB (Transport Block) transmission interval.

The first terminal may send first information on a first carrier, where the first information is used to indicate a parameter set corresponding to at least one second carrier. Optionally, the above parameter set comprises a subcarrier spacing (Sub-CARRIER SPACE, SCS).

The first terminal may send first information on a first carrier, the first information indicating resource pool information available on at least one second carrier.

In some embodiments, the first information is further used to indicate a transmission on the first carrier. Illustratively, the first information includes at least one of an index of the first carrier, a BWP index corresponding to the first carrier, a resource pool index corresponding to the first carrier, a SL transmission resource reservation period corresponding to the first carrier, a parameter set corresponding to the first carrier, and resource pool information available on the first carrier.

The index list of the second carrier in the active state may be an index list of the carrier in the active state. The index list of carriers in the active state includes an index of a second carrier in the active state and an index of a first carrier.

In some embodiments, the first information further includes an index list of all carriers. The index list of all carriers includes the index of the carrier in the active state and the index of the carrier in the inactive state.

In some embodiments, the number of first carriers is one or more.

Illustratively, the number of the first carriers is one, and as shown in fig. 15, there are four carriers of cc#1, cc#2, cc#3, and cc#4 in SL communication, where the first carrier is cc#1, and the second carrier is one carrier of cc#2, cc#3, and cc#4. The first terminal transmits first information on CC #1, the first information indicating a SL transmission status on at least one carrier of CC #2, CC #3, and CC # 4.

As shown in fig. 15, four carriers of cc#1, cc#2, cc#3, and cc#4 exist in SL communication, wherein the first carrier is cc#1 and cc#2, and the second carrier is one carrier of cc#3 and cc#4. The first terminal transmits first information on CC #1 and also transmits first information on CC #2, the first information indicating SL transmission on at least one of CC #3 and CC # 4.

In some embodiments, the first carrier is preconfigured, or configured by a network device or anchor terminal.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, and cc#1 is preconfigured as the first carrier. The pre-configuration refers to pre-configuring the first carrier in the first terminal.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, and the network device or anchor terminal configures cc#1 as the first carrier.

In some embodiments, the first carrier supports semi-static changes, or supports dynamic changes.

The first carrier supports semi-static change, for example, as shown in fig. 15, the first terminal determines that the first carrier is cc#1 according to the first configuration information, the first terminal determines that the first carrier is cc#2 according to the second configuration information, and uses cc#1 as the first carrier until the first terminal receives the second configuration information. After receiving the second configuration information, the first terminal changes the first carrier from cc#1 to cc#2.

The first carrier supports dynamic changes, and illustratively, as shown in fig. 15, in SL communication, the first carrier dynamically changes in cc#1, cc#2, cc#3, and cc#4. For example, the first terminal may determine the first carrier by itself, and the first carrier determined by the first terminal may be dynamically changed.

In some embodiments, the first carrier is a primary carrier. In some embodiments, the primary carrier may also be referred to as an anchor carrier.

The first terminal may send first information on a primary carrier, the first information indicating SL transmission on at least one secondary carrier, the primary carrier and the secondary carrier being different carriers.

In some embodiments, the number of primary carriers is one or more.

As shown in fig. 15, four carriers of cc#1, cc#2, cc#3, and cc#4 exist in SL communication, wherein the second carrier is one carrier of cc#2, cc#3, and cc#4 if the primary carrier is cc#1. The first terminal transmits first information on CC #1, the first information indicating a SL transmission status on at least one carrier of CC #2, CC #3, and CC # 4.

As shown in fig. 15, four carriers of cc#1, cc#2, cc#3, and cc#4 exist in SL communication, wherein the primary carriers are cc#1 and cc#2, and the second carrier is one carrier of cc#3 and cc#4. The first terminal transmits first information on cc#1 and cc#2, respectively, the first information indicating a SL transmission situation on at least one carrier of cc#3 and cc#4.

In some embodiments, the primary carrier is preconfigured, or configured by the network device or anchor terminal.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, and cc#1 is preconfigured as a primary carrier.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, and the network device or anchor terminal configures cc#1 as a primary carrier.

In some embodiments, the primary carrier supports semi-static changes, or supports dynamic changes.

The primary carrier supports semi-static change, and illustratively, as shown in fig. 15, the first terminal determines that the primary carrier is cc#1 according to the first configuration information, the first terminal determines that the primary carrier is cc#2 according to the second configuration information, and uses cc#1 as the primary carrier until the first terminal receives the second configuration information. After receiving the second configuration information, the first terminal changes the primary carrier from cc#1 to cc#2.

The primary carrier supports dynamic changes, and illustratively, as shown in fig. 15, in SL communication, the primary carrier dynamically changes in cc#1, cc#2, cc#3, and cc#4. For example, the first terminal may determine the primary carrier itself, and the primary carrier determined by the first terminal may be dynamically changing.

In some embodiments, the first information is carried in SCI, or in MAC CE (MAC Control Element, medium access control unit) signaling, or in PC5-RRC (Radio Resource Control ) signaling over a PC5 interface.

The SCI may be a first-stage SCI (1 st-stage-SCI) or a second-stage SCI (2 st-stage-SCI), which is not limited in the present application.

The first information is illustratively carried in SCI carried in PSCCH channel, or in MAC CE signaling carried in PSCCH channel, or in PC5-RRC signaling based on PC5 interface.

In some embodiments, the SL transmission on the second carrier includes the SL transmission on the second carrier by the first terminal and/or the SL transmission on the second carrier by at least one other terminal other than the first terminal.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, taking cc#1 as a first carrier and cc#2 as a second carrier as an example.

In some embodiments, the SL transmission on the second carrier comprises the SL transmission of the first terminal on the second carrier, and the SL transmission on the second carrier comprises the SL transmission of the first terminal on CC # 2.

In some embodiments, the SL transmission on the second carrier includes an SL transmission on the second carrier of at least one other terminal than the first terminal, and the SL transmission on the second carrier may include an SL transmission on CC #2 of a third terminal, which is a terminal device different from the first terminal.

In some embodiments, the SL transmission on the second carrier includes a SL transmission on the second carrier by the first terminal and a SL transmission on the second carrier by at least one other terminal other than the first terminal. The SL transmission case on the second carrier includes a SL transmission case of the first terminal on CC #2 and a SL transmission case of the third terminal on CC #2, where time-frequency resources occupied by the first terminal and the third terminal for transmitting SL data on CC #2 do not overlap.

In some embodiments, the first terminal and the third terminal do not transmit SL data on the same carrier, as shown in FIG. 15, the first terminal transmits SL data on CC#1 and CC#2, the third terminal transmits SL data on CC#3, wherein the first carrier is CC#1, and the SL transmission case on the second carrier includes the SL transmission case of the first terminal on CC#2 and the SL transmission case of the third terminal on CC#3.

In some embodiments, the plurality of second carriers, the SL transmission situation on the second carrier comprises the SL transmission situation of the first terminal on at least one second carrier, and/or the SL transmission situation of at least one other terminal except the first terminal on at least one second carrier.

Illustratively, as shown in fig. 15, four carriers of cc#1, cc#2, cc#3, and cc#4 exist in SL communication, and the first terminal and the third terminal each transmit SL data on the four carriers, taking cc#1 as the first carrier as an example.

In some embodiments, the SL transmission on the second carrier includes the SL transmission of the first terminal on at least one second carrier, and the SL transmission on the second carrier includes the SL transmission of the first terminal on at least one of cc#2, cc#3, and cc#4.

In some embodiments, the SL transmission on the second carrier includes an SL transmission on at least one second carrier of at least one other terminal other than the first terminal, and the SL transmission on the second carrier includes an SL transmission on at least one of cc#2, cc#3, and cc#4 of the third terminal.

In some embodiments, the SL transmission situation on the second carrier comprises the SL transmission situation of the first terminal on at least one second carrier, and the SL transmission situation of at least one other terminal except the first terminal on at least one second carrier, and the SL transmission situation on the second carrier comprises the SL transmission situation of the first terminal on at least one carrier of CC#2, CC#3 and CC#4, and the SL transmission situation of the third terminal on at least one carrier of CC#2, CC#3 and CC#4.

It should be noted that, the first terminal may obtain, through sensing, the SL transmission situation of at least one other terminal except the first terminal on the second carrier, or may configure the SL transmission situation of at least one other terminal except the first terminal on the second carrier in the first terminal, which is not limited in this application.

According to the technical scheme provided by the embodiment of the application, the transmitting end transmits the first information on a certain carrier, the first information is used for indicating the SL transmission conditions on other carriers except the carrier, the receiving end does not need to perform sensing/decoding/blind detection on each carrier, and the SL transmission conditions on other carriers can be clarified only by receiving the carrier and the first information, so that the complexity of receiving SL data when the receiving end operates in multiple carriers is greatly reduced, the sensing step is reduced, the blind detection complexity is reduced, and the electric energy is further saved.

Referring to fig. 16, a flowchart of a SL communication method according to another embodiment of the present application is shown. The method may be applied to the network architecture shown in fig. 1, and the method may include at least one of the following steps 1410 to 1430:

In some embodiments, for each of the n carriers, the carrier is taken as a first carrier, the second carrier is one carrier of the n carriers except for the first carrier, and n is an integer greater than 1.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, n=4, and for each of the four carriers, each carrier is taken as a first carrier, and for each first carrier, the second carrier is one carrier other than the first carrier among the four carriers. The first terminal takes a CC#1 as a first carrier, takes a second carrier as one carrier of the CC#2, the CC#3 and the CC#4, the first terminal transmits first information on the CC#1, the first information is used for indicating SL transmission conditions on at least one carrier of the CC#2, the CC#3 and the CC#4, the first terminal takes the CC#2 as the first carrier, takes the second carrier as one carrier of the CC#1, the CC#3 and the CC#4, the first terminal transmits first information on the CC#2, the first information is used for indicating SL transmission conditions on at least one carrier of the CC#1, the CC#3 and the CC#4, the first terminal takes the CC#3 as the first carrier, the second carrier is one carrier of the CC#1, the CC#2 and the CC#4, the first terminal transmits the first information on the CC#3, the first information is used for indicating SL transmission conditions on at least one carrier of the CC#1, the CC#2 and the CC#4, and the first terminal transmits the first information on the first carrier of the CC#1, the CC#3 and the first carrier of the CC#2 and the first carrier of the CC#4.

In some embodiments, for each of the n carriers, the carrier is taken as a first carrier, the second carrier is one carrier of the n carriers except for the first carrier, and n is an integer greater than 1. The first terminal transmits first information on a first carrier, where the first information is used to indicate SL transmission conditions on the n carriers (including the first carrier and at least one second carrier).

Illustratively, as shown in fig. 15, four carriers of cc#1, cc#2, cc#3 and cc#4 exist in SL communication, n=4, and for each of the four carriers, each carrier is taken as a first carrier, and for each first carrier, the first terminal transmits first information on the first carrier, the first information being used to indicate SL transmission conditions on the four carriers. That is, the first terminal takes the CC#1 as the first carrier, the first terminal transmits first information on the CC#1, the first information indicating SL transmission cases on the CC#1, the CC#2, the CC#3 and the CC#4, and the first terminal takes the CC#2 as the first carrier, the first terminal transmits first information on the CC#1, the first information indicating SL transmission cases on the CC#1, the CC#2, the CC#3 and the CC#4, and the first terminal takes the CC#3 as the first carrier, the first terminal transmits first information on the CC#1, the first information indicating SL transmission cases on the CC#1, the CC#2, the CC#3 and the CC#4, and the first terminal transmits first information on the CC#1, the first information indicating SL transmission cases on the CC#1, the CC#2, the CC#3 and the CC#4.

By the method, all carriers are used as the first carrier to send the first information, and the receiving end receives the first information sent by any carrier, so that SL sending conditions on other carriers can be obtained without limiting a certain carrier to be the first carrier.

In some embodiments, one carrier of the n carriers is taken as a first carrier, the second carrier is one carrier of the n carriers except for the first carrier, and n is an integer greater than 1.

Illustratively, as shown in fig. 15, four carriers cc#1, cc#2, cc#3, and cc#4 exist in SL communication, n=4, and one of the four carriers is taken as a first carrier, and the second carrier is taken as one carrier other than the first carrier among the four carriers. That is, the first terminal uses the CC#1 as a first carrier, the second carrier is one carrier of the CC#2, the CC#3 and the CC#4, the first terminal transmits first information on the CC#1, the first information is used for indicating a SL transmission condition on at least one carrier of the CC#2, the CC#3 and the CC#4, or the first terminal uses the CC#2 as the first carrier, the second carrier is one carrier of the CC#1, the CC#3 and the CC#4, the first terminal transmits first information on the CC#2, the first information is used for indicating a SL transmission condition on at least one carrier of the CC#1, the CC#3 and the CC#4, or the first terminal uses the CC#3 as the first carrier, the second carrier is one carrier of the CC#1, the CC#2 and the CC#4, the first terminal transmits first information on the CC#3, the first information is used for indicating a transmission condition on at least one carrier of the CC#1, the CC#2 and the CC#4, or the first terminal transmits the first information on the CC#3 and the first carrier of the CC#1, the first carrier is used for indicating a SL transmission condition on at least one carrier of the CC#1, the CC#2 and the CC#4.

By the method, the first information is only sent on one first carrier, the receiving end can acquire the SL sending condition on other carriers only by the first information on the first carrier, and compared with the method that each carrier is used as the first carrier to send the first information, signaling resources are saved.

In some embodiments, the information sent on the first carrier carries first indication information, where the first indication information is used to indicate that the carrier on which the information is located is the first carrier.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, wherein the first carrier is cc#1, and the second carrier is one carrier of cc#2, cc#3, and cc#4. The information sent on cc#1 carries first indication information, where the first indication information is used to indicate that the carrier cc#1 on which the information is located is a first carrier. In some embodiments, the first carrier is a primary carrier, and the first indication information is used to indicate that the carrier cc#1 where the above information is located is the primary carrier. The first indication information may be represented by 1bit, and illustratively, 0 represents that the carrier cc#1 on which the information is located is not the first carrier, and 1 represents that the carrier cc#1 on which the information is located is the first carrier.

The information sent on the first carrier carries indication information, the carrier is indicated to be the first carrier, the receiving end perceives the carrier, the carrier can be determined to be the first carrier, and then the first information transmitted on the carrier is received, so that the perceiving steps are reduced.

In some embodiments, the information sent on any carrier carries second indication information, where the second indication information is used to determine the first carrier.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, wherein the first carrier is cc#1, and the second carrier is one carrier of cc#2, cc#3, and cc#4. The information transmitted on any one or more carriers of cc#1, cc#2, cc#3, and cc#4 carries second indication information for indicating that carrier cc#1 is the first carrier. The second indication information may be represented by at least one bit, for example, the second indication information may be an index of the first carrier.

The information sent by all the carriers carries indication information to indicate the first carrier, and the receiving end can determine the first carrier by sensing the indication information on any carrier, so that the sensing steps are reduced.

In some embodiments, the first indication information is carried in SCI, or in MAC CE signaling, or in PC5-RRC signaling based on a PC5 interface.

In some embodiments, the second indication information is carried in SCI, or in MAC CE signaling, or in PC5-RRC signaling based on a PC5 interface.

In some embodiments, the first indication information or the second indication information is updated correspondingly when the first carrier changes.

Illustratively, as shown in fig. 15, the first terminal transmits SL data on four carriers of cc#1, cc#2, cc#3, and cc#4, and the first carrier is changed from cc#1 to cc#2, and the first terminal no longer carries the first indication information in the information transmitted on cc#1, but carries the first indication information in the information transmitted on cc#2.

As illustrated in fig. 15, the first terminal transmits SL data on four carriers of cc#1, cc#2, cc#3, and cc#4, and the first carrier is changed from cc#1 to cc#2, and the first terminal carries second indication information in information transmitted on any one or more of the carriers of cc#1, cc#2, cc#3, and cc#4, and the second indication information is changed from indicating carrier cc#1 as the first carrier to indicating carrier cc#2 as the first carrier.

In step 1420, the second terminal receives SL data transmitted on at least one second carrier according to the SL transmission on the at least one second carrier.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, wherein the first carrier is cc#1, and the second carrier is one carrier of cc#2, cc#3, and cc#4. The second terminal receives and decodes the first information transmitted by the first terminal on the CC #1, and learns the SL transmission condition on at least one carrier of the CC #2, the CC #3, and the CC #4 through the first information. The second terminal receives the SL data transmitted on at least one carrier of cc#2, cc#3, and cc#4 according to the SL transmission on at least one carrier of cc#2, cc#3, and cc#4. For example, the second carrier is cc#2. The second terminal receives and decodes the first information transmitted by the first terminal on CC #1, and obtains the SL transmission status on CC #2 according to the first information. The second terminal receives the SL data transmitted on CC #2 according to the SL transmission on CC #2. The SL data on CC #2 may be transmitted by the first terminal, or may be transmitted by at least one other terminal other than the first terminal, or may be transmitted by the first terminal and at least one other terminal other than the first terminal, which is not limited in the present application.

In step 1430, the second terminal performs resource exclusion and/or resource selection associated with the second carrier according to the SL transmission of the first terminal on the second carrier.

Illustratively, as shown in fig. 15, there are four carriers cc#1, cc#2, cc#3, and cc#4 in SL communication, wherein the first carrier is cc#1, and the second carrier is one carrier of cc#2, cc#3, and cc#4. The second terminal receives and decodes the first information transmitted by the first terminal on the CC #1, and learns the SL transmission condition on at least one carrier of the CC #2, the CC #3, and the CC #4 through the first information. The second terminal performs resource exclusion and/or resource selection related to at least one carrier of cc#2, cc#3, and cc#4 according to the SL transmission case on at least one carrier of cc#2, cc#3, and cc#4. For example, when the second terminal performs resource exclusion related to at least one carrier of cc#2, cc#3, and cc#4, the second terminal excludes the reserved/occupied resource on at least one carrier of cc#2, cc#3, and cc#4 from the available candidate resource set corresponding to the second terminal according to the SL transmission situation on at least one carrier of cc#2, cc#3, and cc#4. For example, when the second terminal performs resource selection related to at least one carrier of cc#2, cc#3 and cc#4, according to the SL transmission situation on at least one carrier of cc#2, cc#3 and cc#4, the resources reserved/occupied on at least one carrier of cc#2, cc#3 and cc#4 are excluded from the available candidate resource set corresponding to the second terminal, and then resource selection is performed in the corresponding available candidate resource set.

It should be noted that, the above steps 1420 and 1430 may be alternatively or both executed, and the present application is not limited thereto, and the step 1420 may be executed before the step 1430, after the step 1430, or simultaneously executed, and the present application is not limited thereto.

According to the technical scheme provided by the embodiment of the application, the transmitting end transmits the first information on a certain carrier, the first information is used for indicating the SL transmission conditions on other carriers except the carrier, the receiving end does not need to perform sensing/decoding/blind detection on each carrier, and the SL transmission conditions on other carriers can be clarified only by receiving the carrier and the first information, so that the complexity of receiving SL data when the receiving end operates in multiple carriers is greatly reduced, the sensing step is reduced, the blind detection complexity is reduced, and the electric energy is further saved. And the receiving end can receive the SL data on the carrier wave except the carrier wave according to the SL sending condition on the carrier wave except the carrier wave, or perform resource exclusion/resource selection with the carrier wave except the carrier wave, thereby reducing the sensing step, reducing the blind detection complexity and further saving the electric energy.

The steps performed by the first device may be implemented solely as a SL communication method on the first device side, and the steps performed by the second device may be implemented solely as a SL communication method on the second device side.

The following are examples of the apparatus of the present application that may be used to perform the method embodiments of the present application. For details not disclosed in the embodiments of the apparatus of the present application, please refer to the embodiments of the method of the present application.

Referring to fig. 17, a block diagram of an SL communication device according to an embodiment of the present application is shown. The device has the function of realizing the SL communication method example, and the function can be realized by hardware or can be realized by executing corresponding software by hardware. The device may be the terminal device described above, or may be provided in the terminal device. As shown in fig. 17, the apparatus 1700 may include a transmitting module 1710.

In some embodiments, the apparatus 1700 includes:

A transmitting module 1710, configured to transmit first information on a first carrier, where the first information is used to indicate SL transmission on at least one second carrier, and the first carrier and the second carrier are different carriers.

In some embodiments, the first information includes at least one of:

an index list of at least one second carrier in an active state;

a partial bandwidth BWP index corresponding to the at least one second carrier;

a resource pool index corresponding to the at least one second carrier;

a time domain offset corresponding to the at least one second carrier;

a frequency domain offset corresponding to the at least one second carrier;

A SL transmission resource reservation period corresponding to the at least one second carrier;

a parameter set corresponding to the at least one second carrier;

And resource pool information available on the at least one second carrier.

In some embodiments, the number of first carriers is one or more.

In some embodiments, the first carrier is preconfigured or configured by a network device or anchor terminal.

In some embodiments, the first carrier is a primary carrier of the first terminal.

In some embodiments, the information sent on the first carrier carries first indication information, where the first indication information is used to indicate that a carrier on which the information is located is the first carrier;

Or alternatively

And carrying second indication information in information sent on any carrier, wherein the second indication information is used for determining the first carrier.

In some embodiments, the first information is carried in the side control information SCI, or in the medium access control unit MAC CE signaling, or in the radio link control PC5-RRC signaling based on the PC5 interface.

In some embodiments, for each of n carriers, the carrier is taken as the first carrier, the second carrier is one carrier of the n carriers other than the first carrier, and n is an integer greater than 1.

In some embodiments, one carrier of n carriers is taken as the first carrier, the second carrier is one carrier of the n carriers except for the first carrier, and n is an integer greater than 1.

In some embodiments, the SL transmission case on the second carrier includes:

The SL transmission condition of the first terminal on the second carrier;

And/or the number of the groups of groups,

SL transmission by at least one other terminal than the first terminal on said second carrier.

In summary, according to the technical scheme provided by the embodiment of the application, the transmitting end transmits the first information on a certain carrier, the first information is used for indicating the SL transmitting conditions on other carriers except the carrier, the receiving end does not need to perform sensing/decoding/blind detection on each carrier, and the SL transmitting conditions on other carriers can be clarified only by receiving the carrier and the first information, so that the complexity of receiving the SL data by the receiving end in multi-carrier operation is greatly reduced, the sensing step is reduced, the blind detection complexity is reduced, and the electric energy is further saved.

Referring to fig. 18, a block diagram of an SL communication device according to another embodiment of the present application is shown. The device has the function of realizing the SL communication method example, and the function can be realized by hardware or can be realized by executing corresponding software by hardware. The device may be the terminal device described above, or may be provided in the terminal device. As shown in fig. 18, the apparatus 1800 may include a first receiving module 1810.

In some embodiments, the apparatus 1800 includes:

a first receiving module 1810, configured to receive first information sent by a first terminal on a first carrier, where the first information is used to indicate SL sending situations on at least one second carrier, and the first carrier and the second carrier are different carriers.

In some embodiments, the first information includes at least one of:

an index list of at least one second carrier in an active state;

a partial bandwidth BWP index corresponding to the at least one second carrier;

a resource pool index corresponding to the at least one second carrier;

a time domain offset corresponding to the at least one second carrier;

a frequency domain offset corresponding to the at least one second carrier;

a parameter set corresponding to the at least one second carrier;

And resource pool information available on the at least one second carrier.

In some embodiments, the number of first carriers is one or more.

Or alternatively

In some embodiments, the SL transmission case on the second carrier includes:

The SL transmission condition of the first terminal on the second carrier;

And/or the number of the groups of groups,

And SL transmission of at least one other terminal than the first terminal on the second carrier.

In some embodiments, the receiving module 1810 is further configured to receive SL data sent on the at least one second carrier according to a SL sending situation on the second carrier;

And/or the number of the groups of groups,

The apparatus 1800 further includes a processing module 1820 that performs resource exclusion and/or resource selection associated with the at least one second carrier based on the SL transmission on the second carrier.

It should be noted that, when the apparatus provided in the foregoing embodiment implements the functions thereof, only the division of the foregoing functional modules is used as an example, in practical application, the foregoing functional allocation may be implemented by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules, so as to implement all or part of the functions described above.

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein. For details not described in detail in the device embodiments, reference is made to the method embodiments described above.

Referring to fig. 19, a schematic structural diagram of a terminal device according to an embodiment of the present application is shown. The terminal device 1900 may include a processor 1901, a transceiver 1902, and a memory 1903. The processor 1901 is configured to implement the functions of the processing modules, and the transceiver 1902 is configured to implement the functions of the transmitting module and the receiving module.

The processor 1901 includes one or more processing cores, and the processor 1901 executes various functional applications and information processing by running software programs and modules.

The transceiver 1902 may include a receiver and a transmitter, which may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna, for example.

A memory 1903 may be coupled to the processor 1901 and to the transceiver 1902.

The memory 1903 may be used to store a computer program for execution by the processor, and the processor 1901 is used to execute the computer program to implement the steps in the method embodiments described above.

In some embodiments, where the terminal device is the first terminal described in the above embodiments, the transceiver 1902 is configured to transmit first information on a first carrier, the first information being indicative of SL transmissions on at least one second carrier, the first carrier and the second carrier being different carriers.

In some embodiments, where the terminal device is a second terminal as described in the above embodiments, the transceiver 1902 is configured to receive first information sent by the first terminal on a first carrier, where the first information is used to indicate SL transmission on at least one second carrier, and the first carrier and the second carrier are different carriers.

For details not described in detail in this embodiment, reference may be made to the above embodiments, which are not described in detail herein.

Furthermore, the memory may be implemented by any type or combination of volatile or nonvolatile memory devices including, but not limited to, magnetic or optical disks, electrically erasable programmable read-only memory, static ready-to-access memory, read-only memory, magnetic memory, flash memory, programmable read-only memory.

The embodiment of the application also provides a computer readable storage medium, wherein the storage medium stores a computer program, and the computer program is used for being executed by a processor to realize the SL communication method executed by the first terminal or the second terminal. Alternatively, the computer-readable storage medium may include a ROM (Read-Only Memory), a RAM (Random-Access Memory), an SSD (Solid State disk STATE DRIVES), an optical disk, or the like. The random access memory may include, among other things, reRAM (RESISTANCE RANDOM ACCESS MEMORY, resistive random access memory) and DRAM (Dynamic Random Access Memory ).

The embodiment of the application also provides a chip, which comprises a programmable logic circuit and/or program instructions and is used for realizing the SL communication method executed by the first terminal or the second terminal when the chip runs.

Embodiments of the present application also provide a computer program product comprising computer instructions stored in a computer-readable storage medium, from which a processor reads and executes the computer instructions to implement a SL communication method performed by the first terminal or the second terminal described above.

It should be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, an indirect indication, or an indication having an association relationship. For example, the indication B may indicate that a directly indicates B, for example, B may be obtained by a, or may indicate that a indirectly indicates B, for example, a indicates C, B may be obtained by C, or may indicate that a and B have an association relationship.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct correspondence or an indirect correspondence between the two, or may indicate that there is an association between the two, or may indicate a relationship between the two and the indicated, configured, etc.

In some embodiments of the present application, the "predefined" may be implemented by pre-storing corresponding codes, tables, or other means that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the present application is not limited to a specific implementation thereof. Such as predefined, may refer to what is defined in the protocol.

In some embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied in future communication systems, which is not limited by the present application.

References herein to "a plurality" means two or more. "and/or" describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate that there are three cases of a alone, a and B together, and B alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Reference herein to "greater than or equal to" may mean greater than or equal to, and "less than or equal to" may mean less than or equal to.

In addition, the step numbers described herein are merely exemplary of one possible execution sequence among steps, and in some other embodiments, the steps may be executed out of the order of numbers, such as two differently numbered steps being executed simultaneously, or two differently numbered steps being executed in an order opposite to that shown, which is not limiting.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The foregoing description of the exemplary embodiments of the application is not intended to limit the application to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the application.

Claims

A sidelink SL communication method, characterized in that the method comprises:

The first terminal sends first information on a first carrier, where the first information is used to indicate a SL sending status on at least one second carrier, and the first carrier and the second carrier are different carriers.

The method according to claim 1, wherein the first information includes at least one of the following:

an index list of second carriers in an activated state;

A partial bandwidth BWP index corresponding to the at least one second carrier;

A resource pool index corresponding to the at least one second carrier;

A time domain offset corresponding to the at least one second carrier;

A frequency domain offset corresponding to the at least one second carrier;

The SL transmission resource reservation period corresponding to the at least one second carrier;

A parameter set corresponding to the at least one second carrier;

The at least one second carrier includes resource pool information available on the at least one second carrier.

The method according to claim 1 or 2 is characterized in that the number of the first carrier is one or more.

The method according to any one of claims 1 to 3 is characterized in that the first carrier is preconfigured or configured by a network device or an anchor terminal.

The method according to any one of claims 1 to 4 is characterized in that the first carrier supports semi-static changes or supports dynamic changes.

The method according to any one of claims 1 to 5 is characterized in that the first carrier is a primary carrier of the first terminal.

The method according to any one of claims 1 to 6, characterized in that

The information sent on the first carrier carries first indication information, where the first indication information is used to indicate that the carrier on which the information is located is the first carrier;

or,

The information sent on any carrier carries second indication information, where the second indication information is used to determine the first carrier.

The method according to any one of claims 1 to 7 is characterized in that the first information is carried in the side control information SCI, or carried in the media access control unit MAC CE signaling, or carried in the radio link control PC5-RRC signaling based on the PC5 interface.

The method according to any one of claims 1 to 8 is characterized in that, for each of n carriers, the carrier is used as the first carrier, the second carrier is a carrier among the n carriers except the first carrier, and n is an integer greater than 1.

The method according to any one of claims 1 to 8 is characterized in that one of n carriers is used as the first carrier, the second carrier is a carrier among the n carriers except the first carrier, and n is an integer greater than 1.

The method according to any one of claims 1 to 10, characterized in that the SL sending condition on the second carrier comprises:

SL sending status of the first terminal on the second carrier;

and/or,

SL sending status of at least one other terminal except the first terminal on the second carrier.

A sidelink SL communication method, characterized in that the method comprises:

The second terminal receives first information sent by the first terminal on a first carrier, where the first information is used to indicate a SL sending status on at least one second carrier, and the first carrier and the second carrier are different carriers.

The method according to claim 12, characterized in that the first information includes at least one of the following:

an index list of second carriers in an activated state;

A partial bandwidth BWP index corresponding to the at least one second carrier;

A resource pool index corresponding to the at least one second carrier;

A time domain offset corresponding to the at least one second carrier;

A frequency domain offset corresponding to the at least one second carrier;

A parameter set corresponding to the at least one second carrier;

The method according to claim 12 or 13 is characterized in that the number of the first carrier is one or more.

The method according to any one of claims 12 to 14, characterized in that the first carrier is preconfigured or configured by a network device or an anchor terminal.

The method according to any one of claims 12 to 15 is characterized in that the first carrier supports semi-static changes or supports dynamic changes.

The method according to any one of claims 12 to 16, characterized in that the first carrier is a primary carrier of the first terminal.

The method according to any one of claims 12 to 17, characterized in that

or,

The method according to any one of claims 12 to 18 is characterized in that the first information is carried in the side control information SCI, or carried in the media access control unit MAC CE signaling, or carried in the radio link control PC5-RRC signaling based on the PC5 interface.

The method according to any one of claims 12 to 19 is characterized in that, for each of n carriers, the carrier is used as the first carrier, the second carrier is a carrier among the n carriers except the first carrier, and n is an integer greater than 1.

The method according to any one of claims 12 to 19 is characterized in that one of n carriers is used as the first carrier, the second carrier is a carrier among the n carriers except the first carrier, and n is an integer greater than 1.

The method according to any one of claims 12 to 21, characterized in that the SL sending condition on the second carrier comprises:

SL sending status of the first terminal on the second carrier;

and/or,

The method according to any one of claims 12 to 22, characterized in that after the second terminal receives the first information sent by the first terminal on the first carrier, it also includes:

The second terminal receives, according to the SL sending condition on the second carrier, the SL data sent on the at least one second carrier;

and/or,

The second terminal performs resource exclusion and/or resource selection related to the at least one second carrier according to the SL sending condition on the second carrier.

A side link (SL) communication device, characterized in that the device comprises:

The sending module is used to send first information on a first carrier, where the first information is used to indicate the SL sending status on at least one second carrier, and the first carrier and the second carrier are different carriers.

The device according to claim 24, characterized in that the first information includes at least one of the following:

an index list of second carriers in an activated state;

A partial bandwidth BWP index corresponding to the at least one second carrier;

A resource pool index corresponding to the at least one second carrier;

A time domain offset corresponding to the at least one second carrier;

A frequency domain offset corresponding to the at least one second carrier;

A parameter set corresponding to the at least one second carrier;

The device according to claim 24 or 25 is characterized in that the number of the first carrier is one or more.

The apparatus according to any one of claims 24 to 26, wherein the first carrier is preconfigured or configured by a network device or an anchor terminal.

The device according to any one of claims 24 to 27 is characterized in that the first carrier supports semi-static changes or supports dynamic changes.

The device according to any one of claims 24 to 28 is characterized in that the first carrier is a main carrier of the first terminal.

The device according to any one of claims 24 to 29, characterized in that

or,

The device according to any one of claims 24 to 30 is characterized in that the first information is carried in the side control information SCI, or carried in the media access control unit MAC CE signaling, or carried in the radio link control PC5-RRC signaling based on the PC5 interface.

The device according to any one of claims 24 to 31 is characterized in that, for each carrier among n carriers, the carrier is used as the first carrier, the second carrier is a carrier among the n carriers except the first carrier, and n is an integer greater than 1.

The device according to any one of claims 24 to 31 is characterized in that one of n carriers is used as the first carrier, the second carrier is a carrier among the n carriers except the first carrier, and n is an integer greater than 1.

The apparatus according to any one of claims 24 to 33, wherein the SL sending condition on the second carrier comprises:

SL sending status of the first terminal on the second carrier;

and/or,

The receiving module is used to receive first information sent by a first terminal on a first carrier, where the first information is used to indicate SL sending status on at least one second carrier, and the first carrier and the second carrier are different carriers.

The device according to claim 35, characterized in that the first information includes at least one of the following:

an index list of second carriers in an activated state;

A partial bandwidth BWP index corresponding to the at least one second carrier;

A resource pool index corresponding to the at least one second carrier;

A time domain offset corresponding to the at least one second carrier;

A frequency domain offset corresponding to the at least one second carrier;

A parameter set corresponding to the at least one second carrier;

The device according to claim 35 or 36 is characterized in that the number of the first carriers is one or more.

The apparatus according to any one of claims 35 to 37, wherein the first carrier is preconfigured or configured by a network device or an anchor terminal.

The device according to any one of claims 35 to 38 is characterized in that the first carrier supports semi-static changes or supports dynamic changes.

The device according to any one of claims 35 to 39 is characterized in that the first carrier is a primary carrier of the first terminal.

The device according to any one of claims 35 to 40, characterized in that

or,

The device according to any one of claims 35 to 41 is characterized in that the first information is carried in the side control information SCI, or carried in the media access control unit MAC CE signaling, or carried in the radio link control PC5-RRC signaling based on the PC5 interface.

The device according to any one of claims 35 to 42 is characterized in that, for each of n carriers, the carrier is used as the first carrier, the second carrier is a carrier among the n carriers except the first carrier, and n is an integer greater than 1.

The device according to any one of claims 35 to 42 is characterized in that one carrier among n carriers is used as the first carrier, the second carrier is a carrier among the n carriers except the first carrier, and n is an integer greater than 1.

The apparatus according to any one of claims 35 to 44, wherein the SL sending condition on the second carrier comprises:

SL sending status of the first terminal on the second carrier;

and/or,

The device according to any one of claims 35 to 45, characterized in that

The receiving module is further configured to receive SL data sent on the at least one second carrier according to the SL sending condition on the second carrier;

and/or,

The apparatus further includes a processing module, configured to perform resource exclusion and/or resource selection related to the at least one second carrier according to a SL transmission condition on the second carrier.

A terminal device, characterized in that the terminal device includes a processor and a memory, the memory stores a computer program, and the processor executes the computer program to implement the method according to any one of claims 1 to 11, or the method according to any one of claims 12 to 23.

A computer-readable storage medium, characterized in that a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to implement the method according to any one of claims 1 to 11, or the method according to any one of claims 12 to 23.

A chip, characterized in that the chip includes a programmable logic circuit and/or program instructions, and when the chip is running, it is used to implement the method according to any one of claims 1 to 11, or the method according to any one of claims 12 to 23.

A computer program product, characterized in that the computer program product includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads and executes the computer instructions from the computer-readable storage medium to implement the method according to any one of claims 1 to 11, or the method according to any one of claims 12 to 23.