Lateral communication method and device

Abstract

The invention relates to a sidewalk communication method and sidewalk communication equipment. The sidelink transmission method comprises: a first communication device receiving first indication information sent by a second communication device, the first indication information being used for activating or deactivating one or more first carriers, or the first indication information being used for indicating that the one or more first carriers are dormant carriers or activated carriers, or the first indication information being used for indicating that the one or more first carriers are non-dormant carriers or activated carriers; the first indication information is used for indicating that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier for sideward transmission. According to the embodiment of the invention, the sideline carrier is activated or deactivated based on the indication information or the timer, and the number of carriers for sideline transmission can be flexibly configured.

Description

Sideline communication method and device Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a sideline communication method and device. Background Art

[0002] In a sidelink multi-carrier system, since sidelink transmission supports multiple carriers, the receiver does not know which carrier or carriers the transmitter will use for sidelink transmission. Therefore, the receiver needs to detect on multiple carriers, such as sidelink control information (SCI) monitoring or SCI detection. However, the transmitter may only transmit data on one carrier, which may result in energy waste.

[0003] Summary of the Invention

[0004] An embodiment of the present application provides a sideline communication method that can flexibly configure a carrier for sideline transmission.

[0005] The present invention provides a sideline communication method, including:

[0006] The first communication device receives first indication information sent by the second communication device, where the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for sidelink transmission.

[0007] The present invention provides a sideline communication method, including:

[0008] The second communication device sends first indication information to the first communication device, where the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for sidelink transmission.

[0009] The present invention provides a sideline communication method, including:

[0010] The first communications device determines whether the first carrier is an activated carrier or a dormant carrier based on a timer.

[0011] An embodiment of the present application provides a first communication device, including:

[0012] A receiving unit is used to receive first indication information sent by a second communication device, where the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

[0013] An embodiment of the present application provides a second communication device, including:

[0014] A sending unit is used to send first indication information to a first communication device, where the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

[0015] An embodiment of the present application provides a first communication device, including:

[0016] The processing unit is configured to determine, based on the timer, whether the first carrier is an activated carrier or a dormant carrier.

[0017] An embodiment of the present application provides a communication device, comprising: a transceiver, a processor, and a memory. The memory is used to store a computer program, the transceiver is used to communicate with other devices, and the processor is used to call and execute the computer program stored in the memory, so that the communication device performs the above-mentioned sideline communication method.

[0018] An embodiment of the present application provides a chip for implementing the above-mentioned side communication method.

[0019] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned sideline communication method.

[0020] An embodiment of the present application provides a computer-readable storage medium for storing a computer program. When the computer program is executed by a device, the device executes the above-mentioned sideline communication method.

[0021] An embodiment of the present application provides a computer program product, including computer program instructions, which enable a computer to execute the above-mentioned sideline communication method.

[0022] An embodiment of the present application provides a computer program, which, when executed on a computer, enables the computer to execute the above-mentioned sideline communication method.

[0023] In the embodiment of the present application, the carrier used for sidelink transmission can be flexibly configured based on indication information or a timer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic diagram of sideline communication within network coverage according to an embodiment of the present application.

[0025] FIG2 is a schematic diagram of partial network coverage sideline communication according to an embodiment of the present application.

[0026] FIG3 is a schematic diagram of network coverage outer line communication according to an embodiment of the present application.

[0027] FIG4 is a schematic diagram of a central control node according to an embodiment of the present application.

[0028] FIG5 is a schematic diagram of unicast according to an embodiment of the present application.

[0029] FIG6 is a schematic diagram of multicast according to an embodiment of the present application.

[0030] FIG7 is a schematic diagram of broadcasting according to an embodiment of the present application.

[0031] Figures 8a, 8b, and 8c are schematic diagrams of the time slot structure in NR-V2X.

[0032] FIG9 is a schematic flowchart of a sideline communication method according to an embodiment of the present application.

[0033] FIG10 is a schematic flowchart of a sideline communication method according to another embodiment of the present application.

[0034] FIG11 is a schematic flowchart of a sideline communication method according to an embodiment of the present application.

[0035] FIG12 is a schematic flowchart of a sideline communication method according to another embodiment of the present application.

[0036] FIG13 is a schematic flowchart of a sideline communication method according to an embodiment of the present application.

[0037] FIG14 is a schematic flowchart of a sideline communication method according to another embodiment of the present application.

[0038] FIG15 is a schematic flowchart of a sideline communication method according to another embodiment of the present application.

[0039] FIG16 is a schematic flowchart of a sideline communication method according to another embodiment of the present application.

[0040] FIG. 17 a and FIG. 17 b are flowcharts of examples based on indication information.

[0041] FIG17c is a schematic diagram of a process for controlling multi-carrier transmission based on indication information in a unicast communication scenario.

[0042] FIG17 d is a flow chart of an example based on a timer and a counter.

[0043] FIG17e is a schematic diagram of controlling multi-carrier transmission based on a timer and a counter in a unicast communication scenario.

[0044] FIG18 is a schematic block diagram of a first communication device according to an embodiment of the present application.

[0045] FIG19 is a schematic block diagram of a first communication device according to another embodiment of the present application.

[0046] FIG20 is a schematic block diagram of a second communication device according to an embodiment of the present application.

[0047] FIG21 is a schematic block diagram of a second communication device according to another embodiment of the present application.

[0048] Figure 22 is a schematic block diagram of a first communication device according to an embodiment of the present application.

[0049] FIG23 is a schematic block diagram of a first communication device according to another embodiment of the present application.

[0050] Figure 24 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0051] Figure 25 is a schematic block diagram of a chip according to an embodiment of the present application.

[0052] Figure 26 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0054] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Sidelink on unlicensed spectrum (SL-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), Fifth Generation (5G) system or other communication systems.

[0055] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0056] In one embodiment, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0057] In one embodiment, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.

[0058] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0059] The terminal device can be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0060] In an embodiment of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0061] In an embodiment of the present application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0062] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0063] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in a WLAN, an evolved base station (eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network or a network device in an NTN network, etc.

[0064] As an example and not a limitation, in an embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Alternatively, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0065] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0066] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0067] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0068] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0069] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0070] Sideline communication in different network coverage environments:

[0071] In sideline communication, according to the network coverage of the communicating terminals, it can be divided into sideline communication within network coverage, sideline communication with partial network coverage, and sideline communication outside network coverage, as shown in Figures 1, 2, 3 and 4 respectively.

[0072] Figure 1: In sideline communications within network coverage, all terminals performing sideline communications are within the coverage of the same base station. Thus, all of the above terminals can perform sideline communications based on the same sideline configuration by receiving configuration signaling from the base station.

[0073] Figure 2: In the case of partial network coverage and sidelink communication, some terminals performing sidelink communication are within the base station's coverage area. These terminals can receive configuration signaling from the base station and perform sidelink communication according to the base station's configuration. However, terminals outside the network coverage area cannot receive configuration signaling from the base station. In this case, terminals outside the network coverage area determine the sidelink configuration and perform sidelink communication based on pre-configuration information and information carried in the Physical Sidelink Broadcast Channel (PSBCH) sent by terminals within the network coverage area.

[0074] Figure 3: For sideline communications outside the network coverage, all terminals performing sideline communications are located outside the network coverage, and all terminals determine the sideline configuration according to pre-configured information for sideline communications.

[0075] Figure 4: For sideline communications with a central control node, multiple terminals form a communication group, which has a central control node, also known as the cluster header (CH). This central control node has at least one of the following functions: establishing the communication group; managing the joining and leaving of group members; coordinating resources, allocating sideline transmission resources to other terminals, receiving sideline feedback from other terminals, and coordinating resources with other communication groups.

[0076] D2D / V2X:

[0077] Device-to-device (D2D) communication is a sidelink (SL) transmission technology that uses direct device-to-device communication, unlike traditional cellular systems where data is sent or received via a base station. This allows for higher spectral efficiency and lower transmission latency. Sidelinks can also be called direct links. Some communication protocols define two transmission modes: mode 1 and mode 2.

[0078] Mode 1: The terminal's transmission resources are allocated by the base station, and the terminal transmits data on the sidelink based on the allocated resources. The base station can dynamically allocate sidelink transmission resources to the terminal, or semi-statically allocate them. As shown in Figure 1, when the terminal is within network coverage, the network allocates transmission resources for sidelink transmission.

[0079] Mode 2: The terminal selects a resource from the resource pool for data transmission. As shown in Figure 3, if the terminal is outside the cell coverage area, it autonomously selects a transmission resource from the pre-configured resource pool for sidelink transmission. Alternatively, as shown in Figure 1, the terminal autonomously selects a transmission resource from the network-configured resource pool for sidelink transmission.

[0080] NR-V2X:

[0081] NR-V2X can adopt the NR-based SL transmission method. In NR-V2X, autonomous driving needs to be supported, which puts forward higher requirements for data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, and more flexible resource allocation.

[0082] NR-V2X supports unicast, multicast, and broadcast transmission modes. For unicast transmission, there is only one receiving terminal. For example, in Figure 5, unicast transmission is performed between UE1 and UE2. For multicast transmission, the receiving terminal is all terminals in a communication group, or all terminals within a certain transmission distance. For example, in Figure 6, UE1, UE2, UE3, and UE4 form a communication group, where UE1 sends data and the other terminal devices in the group are all receiving terminals. For broadcast transmission, the receiving terminal is any terminal around the sending terminal. For example, in Figure 7, UE1 is the sending terminal, and the other terminals around it, UE2-UE6, are all receiving terminals.

[0083] NR SL system frame structure:

[0084] The time slot structure of the NR-based sidelink system is shown in Figures 8a and 8b. Figure 8a shows the time slot structure excluding the Physical Sidelink Feedback Channel (PSFCH) in the time slot, while Figure 8b shows the time slot structure including the PSFCH.

[0085] The Physical Sidelink Control Channel (PSCCH) in the NR SL system starts from the second sidelink symbol of the time slot in the time domain, occupies 2 or 3 Orthogonal Frequency Division Multiplexing (OFDM) symbols, and can occupy {10, 1215, 20, 25} Physical Resource Blocks (PRBs) in the frequency domain. In order to reduce the complexity of the UE's blind detection of the PSCCH, only one number of PSCCH symbols and PRBs are allowed to be configured in a resource pool. In addition, because the sub-channel is the minimum granularity of the Physical Sidelink Shared Channel (PSSCH) resource allocation in the NR SL system, the number of PRBs occupied by the PSCCH must be less than or equal to the number of PRBs contained in a sub-channel in the resource pool, so as to avoid additional restrictions on PSSCH resource selection or allocation. In the time domain, the PSSCH also begins with the second sidelink symbol of the timeslot. The last time domain symbol in the timeslot is the guard period (GP) symbol, and the remaining symbols are mapped to the PSSCH. The first sidelink symbol in the timeslot is a repetition of the second sidelink symbol. The receiving terminal typically uses the first sidelink symbol as an automatic gain control (AGC) symbol; the data on this symbol is not typically used for data demodulation. In the frequency domain, the PSSCH occupies K subchannels, each consisting of N consecutive PRBs. This is shown in Figure 8a below.

[0086] When the time slot contains the PSFCH channel, the PSFCH occupies two symbols in the time domain, corresponding to the second to last and third to last symbols in the time slot. The data on the two symbols is the same. The first PSFCH symbol is usually used as AGC, and the time domain symbol before the PSFCH channel is used as the GP symbol, as shown in Figure 8b.

[0087] When a time slot contains a PSFCH channel, the second to last and third to last symbols in the time slot are used for PSFCH channel transmission, and a time domain symbol before the PSFCH channel is used as a GP symbol, as shown in FIG8c.

[0088] Sidelink multi-carrier mechanism

[0089] In order to improve the throughput of the sidelink transmission system, multi-carrier transmission can be supported on the sidelink link. In the LTE-based sidelink system (LTE SL), the use of multiple carriers for sidelink transmission is supported to increase the system transmission rate or improve transmission reliability. When performing sidelink transmission, the terminal needs to select a carrier. The terminal determines the carrier corresponding to the data to be transmitted based on the correspondence between the service type and the carrier configured by the high-level layer. In the sidelink multi-carrier, carrier aggregation and packet duplication are supported.

[0090] FIG9 is a schematic flow chart of a sideline communication method 900 according to an embodiment of the present application. The method can optionally be applied to the systems shown in FIG1 to FIG7 , but is not limited thereto. The method includes at least part of the following contents.

[0091] S910. The first communication device receives first indication information sent by the second communication device, where the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

[0092] In an embodiment of the present application, the first communication device may be a terminal device in a sideline communication system. The second communication device may be another terminal device in the sideline communication system, or may be a network device. For example, in a sideline multi-carrier system, sideline transmission may support multiple carriers. By activating or deactivating the carrier through the first indication information, the first communication device, such as the terminal device, can flexibly monitor the required carrier. For example, when the sideline transmission does not need to be performed on many carriers, deactivating the carrier through the first indication information can enable the terminal device to only monitor or monitor a few carriers, thereby achieving energy saving. When the sideline transmission needs to be performed on more carriers, activating the carrier through the first indication information allows the terminal device to monitor or monitor more carriers, thereby improving the sideline transmission throughput or reliability.

[0093] In the embodiment of the present application, activating the first carrier can also be described as: the first carrier is activated, the first carrier is an activated carrier, the first carrier is awakened, the first carrier is a non-dormant carrier, and the first carrier exits the dormant state. In this case, the first communication device does not need to perform sidelink control information (SCI) monitoring or physical sidelink control channel (PSCCH) monitoring on the first carrier, or the first communication device does not need to detect sidelink transmission on the first carrier.

[0094] In the embodiment of the present application, deactivating the first carrier may also be described as: the first carrier is deactivated, the first carrier is a deactivated carrier, the first carrier is dormant, the first carrier is a dormant carrier, and the first carrier enters a dormant state. In this case, the first communication device needs to perform sidelink control information (SCI) monitoring or physical sidelink control channel (PSCCH) monitoring on the first carrier, or the first communication device needs to detect sidelink transmission on the first carrier.

[0095] FIG10 is a schematic flow chart of a sideline communication method 1000 according to another embodiment of the present application. The method may include one or more features of the above method. In one embodiment, the method further includes:

[0096] S1010. A first communication device sends second indication information to a second communication device, where the second indication information is used to request the second communication device to activate or deactivate one or more first carriers.

[0097] In an embodiment of the present application, after a first communication device sends second indication information to a second communication device, the second communication device may send first indication information to the first communication device. The first indication information may be ACK or NACK information for the second indication information, used to confirm or deny the request of the first communication device. Based on the ACK / NACK of the first indication information, the first communication device may determine whether the first carrier is activated or deactivated.

[0098] In an embodiment of the present application, the second indication information is used to request the second communication device to activate or deactivate one or more first carriers. It can also be described as the second indication information being used to determine the carrier information to be activated or deactivated in the second communication device, such as the second terminal device. The second communication device can determine the carrier to be activated or deactivated based on the second indication information, and send the first indication information to the first communication device to indicate the carrier information that needs to be activated or deactivated; it can also be described as the second indication information being used to indicate the carrier information (such as the first carrier information) that needs to be activated or deactivated to the second communication device, such as the second terminal device, etc. The second communication device sends the first indication information (such as the first indication information includes ACK or NACK information) to the first communication device based on the second indication information. Further, the first communication device determines whether the first carrier is activated or deactivated based on the first indication information.

[0099] In an embodiment of the present application, the second indication information is used to request the second communication device to activate or deactivate one or more first carriers, and the second communication device can reply whether it agrees to activate or deactivate the one or more first carriers through the first indication information.

[0100] For example, the activated carrier information includes the use of carrier CC1, carrier CC2, carrier CC3 and carrier CC4. If the second indication information sent by the first communication device requests the second communication device to deactivate carrier CC1 and carrier CC2, the first indication information received by the first communication device may include reply confirmation (Acknowledgement, ACK) information or negative acknowledgement (Negative Acknowledgement, NACK) information. If the first indication information indicates ACK information, the first communication device can deactivate carrier CC1 and carrier CC2, and can use carrier CC3 and carrier CC4 to continue side transmission. If the first indication information indicates NACK information, the first communication device cannot deactivate carrier CC1 and carrier CC2, and can still use carrier CC1, carrier CC2, carrier CC3 and carrier CC4 to continue side transmission.

[0101] In one embodiment, the second indication information is used to indicate at least one of the following:

[0102] Instruction information for activating or deactivating the one or more first carriers;

[0103] Carrier information of the one or more first carriers.

[0104] In an embodiment of the present application, the second indication information may explicitly or implicitly indicate activation or deactivation of one or more first carriers. For example, the second indication information includes indication information for activating one or more first carriers, and / or includes carrier information of one or more first carriers. In this case, the second indication information may explicitly activate one or more first carriers, or the second indication information may implicitly deactivate other carriers except the one or more first carriers. For another example, the second indication information includes indication information for deactivating one or more first carriers, and / or includes carrier information of one or more first carriers. In this case, the second indication information may explicitly deactivate one or more first carriers, or the second indication information may implicitly activate other carriers except the one or more first carriers.

[0105] For example, if carriers CC1, CC2, CC3, and CC4 are in a dormant state, the first communication device sends second indication information to the second communication device to instruct it to activate CC1 and CC2, and the second communication device replies with the first indication information to activate CC1 but not CC2, then the first communication device may activate CC1 but not CC2. For another example, if carriers CC1, CC2, CC3, and CC4 are in an active state, the first communication device sends second indication information to the second communication device to instruct it to deactivate CC1 and CC2, and if the second communication device replies with the first indication information to activate CC3 and CC4, then the first communication device may deactivate CC1 and CC2; if the second communication device replies with the first indication information to activate CC1, CC3, and CC4, then the first communication device may deactivate CC2.

[0106] For another example, the activated carrier information includes the use of carrier CC1, carrier CC2, carrier CC3 and carrier CC4. If the second indication information sent by the first communication device requests the second communication device to deactivate carrier CC1 and carrier CC2, the first indication information received by the first communication device may include the deactivated carrier information. If the first indication information indicates to deactivate carrier CC1 and carrier CC2, the first communication device can deactivate carrier CC1 and carrier CC2, and can use carrier CC3 and carrier CC4 to continue side transmission. If the first indication information indicates to deactivate carrier CC1, the first communication device can deactivate carrier CC1, cannot deactivate carrier CC2, and can use carrier CC2, carrier CC3 and carrier CC4 to continue side transmission. If the first indication information indicates to deactivate carrier CC3, the first communication device can deactivate carrier CC3, cannot deactivate carrier CC1 and carrier CC2, and can use carrier CC1, carrier CC2 and carrier CC4 to continue side transmission.

[0107] In one embodiment, the first communication device is a first terminal device, and the second communication device is a second terminal device. This embodiment of the present application can be used in a sideline communication system. If the first communication device is a first terminal device, and the second communication device is a second terminal device, the first terminal device can send second indication information to the second terminal device. The first terminal device can also receive first indication information from the second terminal device.

[0108] In one embodiment, the first indication information is carried in sidelink control information SCI (e.g., first-order SCI or second-order SCI), sidelink reference signal, sidelink feedback control channel (PSFCH), media access control element (MAC CE), or direct communication radio resource control (PC5-RRC) signaling. The sidelink reference signal carrying the first indication information may include a demodulation reference signal (DMRS), a channel state information reference signal (CSI-RS), or a synchronization signal.

[0109] In one embodiment, the second indication information is carried in sidelink control information SCI (e.g., first-order SCI or second-order SCI), sidelink reference signal, PSFCH, MAC CE, or PC5-RRC signaling. The sidelink reference signal carrying the second indication information may include DMRS, CSI-RS, or synchronization signal.

[0110] In one embodiment, the method further comprises:

[0111] S1020: The first communication device receives first indication information sent by the second communication device. For this step, refer to the relevant description of S910.

[0112] In one embodiment, the method further comprises:

[0113] S1030: The first communications device activates or deactivates one or more first carriers based on the first indication information, or determines whether one or more first carriers are activated or deactivated, or determines whether one or more first carriers are dormant carriers. S1030 may be performed directly after S910, or after S1010 and S1020.

[0114] For example, the first communication device can currently perform side transmission on M first carriers. If the first indication information indicates to deactivate N first carriers, N first carriers are deactivated, or N first carriers are dormant carriers, wherein the N first carriers are all or part of the M first carriers, after the first communication device receives the first indication information, it can deactivate N first carriers among the above-mentioned M first carriers, the first communication device can deactivate N first carriers, determine that N carriers are deactivated, or determine that N carriers are dormant carriers, and subsequently be able to perform side transmission on MN first carriers. If the first indication information indicates to activate N first carriers, N first carriers are activated, or N first carriers are activated carriers, wherein the N first carriers are carriers other than the M first carriers, after the first communication device receives the first indication information, it can activate N first carriers, determine that N carriers are activated, determine that N carriers are awakened, or determine that N carriers exit dormancy, and subsequently be able to perform side transmission on M+N first carriers.

[0115] In one embodiment, the first communications device deactivates one or more first carriers based on the first indication information, or determines that one or more first carriers are deactivated, or determines that one or more first carriers are dormant carriers, including at least one of the following:

[0116] The first communication device does not expect to receive sidelink information sent by the second communication device on the first carrier after the first moment; wherein the sidelink information may include PSCCH, PSSCH, PSFCH, sidelink synchronization signal block (Sidelink-Synchronization Signal Block, S-SSB) or SCI, etc.

[0117] The first communication device does not expect to monitor the sideline control information sent by the second communication device on the first carrier after the first moment;

[0118] The first moment is determined based on the second moment and the first duration, and the second moment is determined based on the moment when the first communication device receives the first indication information. In one implementation, the second moment is determined based on the start moment or end moment of the time slot in which the first indication information is located. For example, the second moment is equal to the start moment or end moment of the time slot in which the first indication information is located.

[0119] In an embodiment of the present application, after the first communication device receives the first indication information, after a certain period of time, one or more first carriers are deactivated, or one or more first carriers are determined to be deactivated, or one or more first carriers are determined to be dormant carriers. For example, the moment when the first communication device receives the first indication information is T0, and the second moment obtained based on T0 is T2. T2 can be equal to T0, or can be calculated based on T0. For example, T2=T0+a, where a is a preset value or a value determined according to pre-configuration information or network configuration information. The first moment to deactivate one or more first carriers can be determined based on the second moment and the first duration. For example, the first duration can be Td1, and the first moment T1=T2+Td1. For another example, the first moment T1=T2+Td1+b, where b is a preset value or a value determined according to pre-configuration information or network configuration information.

[0120] For example, after a first communication device, such as a first terminal device, receives the first indication information for deactivating the first carrier, it determines the first time based on the time when the first indication information is received, and does not expect to receive side information sent by a second communication device, such as a second terminal device, on the first carrier after the first time T1, or monitor the side control information sent by the second terminal device on the first carrier.

[0121] In one embodiment, the first communications device activates one or more first carriers based on the first indication information, or determines that one or more first carriers are activated, or determines that one or more first carriers are not dormant carriers, or wakes up one or more first carriers, including at least one of the following:

[0122] The first communication device receives, on the first carrier, sideline information sent by the second communication device after the third moment; wherein the sideline information may include PSCCH, PSSCH, PSFCH, S-SSB or SCI, etc.;

[0123] The first communication device monitors the sideline control information sent by the second communication device on the first carrier after the third moment;

[0124] The first communication device does not expect to receive the side information sent by the second communication device on the first carrier before the third time; wherein the side information may include PSCCH, PSSCH, PSFCH, S-SSB or SCI, etc.;

[0125] The first communication device does not expect to monitor the sideline control information sent by the second communication device on the first carrier before the third time;

[0126] The third moment is determined based on the fourth moment and the second duration, and the fourth moment is determined based on the moment when the first communication device receives the first indication information. In one implementation, the fourth moment is determined based on the start moment or end moment of the time slot in which the first indication information is located. For example, the fourth moment is equal to the start moment or end moment of the time slot in which the first indication information is located.

[0127] In an embodiment of the present application, after the first communication device receives the first indication information, after a certain period of time, one or more first carriers are activated, or it is determined that one or more first carriers are activated, or it is determined that one or more first carriers are not dormant carriers, or one or more first carriers are awakened. For example, the moment when the first communication device receives the first indication information is T5, and the fourth moment obtained based on T5 is T4. T4 can be equal to T5, or it can be calculated based on T5. For example, T4=T5+c, where c is a preset value or a value determined according to pre-configuration information or network configuration information. Based on the fourth moment and the second duration, a third moment for activating one or more first carriers can be determined. For example, the second duration can be Td2, and the third moment T3=T4+Td2. For another example, the third moment T3=T4+Td2+d, where d is a preset value or a value determined according to pre-configuration information or network configuration information.

[0128] For example, after receiving first indication information for activating a first carrier, a first communications device, such as a first terminal device, determines a third time based on the time of receiving the first indication information, and may begin receiving sidelink information sent by the second communications device on the first carrier from the third time T3, or begin monitoring the first carrier for sidelink control information sent by the second communications device. Furthermore, before the third time T3, the first communications device does not receive sidelink information sent by the second communications device on the first carrier, or does not monitor the first carrier for sidelink control information sent by the second communications device.

[0129] In one embodiment, the method for determining the first duration and / or the second duration includes at least one of the following: protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, indication information of the second communication device, and processing time of the terminal device. For example, the first communication device may receive indication information, configuration information, etc. for indicating the first duration and / or the second duration from the second communication device. The first duration and the second duration may be indicated by the same information or may be indicated independently. For another example, if the first communication device is a terminal device, the terminal device may obtain a first moment T1=T0+Tp for starting to deactivate one or more first carriers based on its own processing time Tp and the moment T0 of receiving the first indication information; or, obtain a third moment T3=T5+Tp for starting to activate one or more first carriers based on its own processing time Tp and the moment T3 of receiving the first indication information.

[0130] In one embodiment, when the first indication information is carried in an SCI or a MAC CE, the method further includes:

[0131] S1040. The first communication device sends sideline feedback information to the second communication device, where the sideline feedback information is used to indicate whether the first communication device correctly receives the first indication information and / or whether the one or more first carriers are activated or deactivated.

[0132] In an embodiment of the present application, after the first communication device receives the first indication information carried in the SCI or MAC CE, it can send the first sideline feedback information to the second communication device. The first sideline feedback information can be carried in the PSFCH. The first sideline feedback information can be used to indicate whether the first indication information is correctly received by the first communication device. For example, if the indicator bit used to indicate the reception result in the first sideline feedback information is 1, it means that the first indication information is correctly received, and if it is 0, it means that the first indication information is not correctly received. The values ​​of the above-mentioned indicator bits are only examples and not limitations, and can also be indicated by other values. For example, if the indicator bit is 0, 01 or 11, it means that the first indication information is correctly received, and if it is 1, 10 or 00, it means that the first indication information is not correctly received. For another example, if the first sideline feedback information is ACK, it means that the first indication information is correctly received, and if it is NACK, it means that the first indication information is not correctly received.

[0133] In an embodiment of the present application, after the first communication device receives the first indication information carried in the SCI or MAC CE, it can send second sidelink feedback information to the second communication device. The second sidelink feedback information can be carried in the PSFCH, SCI or MAC CE. The second sidelink feedback information can be used to indicate whether the N first carriers indicated by the first indication information are activated or deactivated by the first communication device. For example, the first indication information sent by the second communication device indicates the activation of N first carriers. The first communication device receives the first indication information and sends the second sidelink feedback information to the second communication device. If the indicator bit in the second sidelink feedback information is 1, it indicates that the above-mentioned N first carriers are activated, and if it is 0, it indicates that the above-mentioned N first carriers are not activated. The value of the above-mentioned indicator bit is only an example, not a limitation, and can also be indicated by other values. For example, the indicator bit is 0, which indicates that the above-mentioned N first carriers are activated, and 1, which indicates that the above-mentioned N first carriers are not activated. For another example, the N first carriers that need to be activated include CC1 and CC2. The indicator bit 01 indicates that CC1 is activated but CC2 is not activated, the indicator bit 11 indicates that CC1 and CC2 are activated, and the indicator bit 10 indicates that CC2 is activated but CC1 is not activated.

[0134] In one embodiment, the first communication device receiving the first indication information sent by the second communication device includes:

[0135] The first communication device receives the first indication information sent by the second communication device on a second carrier, where the second carrier is different from the first carrier, or the second carrier is one of the one or more first carriers.

[0136] For example, the one or more first carriers that need to be activated or deactivated indicated by the first indication information include CC1 and CC2. The second communication device may send the first indication information on CC1 and / or CC2. The first communication device may receive the first indication information on CC1 and / or CC2.

[0137] For another example, the one or more first carriers that need to be activated or deactivated indicated by the first indication information include CC1 and CC2. The second communication device may send the first indication information on CC3. The first communication device may receive the first indication information on CC3.

[0138] In one implementation, the second carrier includes at least one of the following:

[0139] A carrier used when the first communication device and the second communication device utilize one carrier for sidelink transmission;

[0140] PC5-carrier used for RRC signaling transmission;

[0141] The carrier on which the Direct Communication Request (DCR) information is located.

[0142] For example, carrier CC3 is the carrier used when the first communication device and the second communication device use only one carrier for sidelink transmission. The second communication device can send the first indication information via carrier CC3. If the first indication information indicates activation of carriers CC1 and CC2, after the first communication device successfully activates CC1 and CC2, the first communication device and the second communication device can use CC1, CC2, and CC3 for sidelink transmission.

[0143] For another example, if the carrier used for PC5-RRC signaling transmission includes CC4, the first indication information can be transmitted on CC4. If the first indication information indicates activation of carriers CC1 and CC2, then after the first communication device successfully activates CC1 and CC2, CC1, CC2, and CC4 can be used for sideline transmission between the first communication device and the second communication device. Furthermore, if the first indication information transmitted on CC4 indicates deactivation of CC2, then after the first communication device successfully deactivates CC2, CC1 and CC4 can be used for sideline transmission between the first communication device and the second communication device.

[0144] For another example, if the carrier where the DCR information is located includes CC6, the first indication information can be transmitted on CC6. If the first indication information indicates activation of carriers CC1 and CC2, then after the first communication device successfully activates CC1 and CC2, sideline transmission between the first communication device and the second communication device can be performed using CC1, CC2, and CC6. If the first indication information indicates activation of carriers CC1 and CC2 and deactivation of CC6, then after the first communication device successfully activates CC1 and CC2 and deactivates CC6, sideline transmission between the first communication device and the second communication device can be performed using CC1 and CC2.

[0145] In one implementation, the second carrier is determined in at least one of the following ways:

[0146] The carrier where the DCR information and / or DCA information is located during unicast link establishment;

[0147] The carrier where PC5-S is located;

[0148] Main carrier;

[0149] The third indication information sent by the first communication device or the second communication device is used to indicate the second carrier.

[0150] For example, if the carrier on which the DCR information is located during unicast link establishment is CC1, the first indication information can be transmitted on CC1. For another example, if the carrier on which the DCA information is located during unicast link establishment is CC2, the first indication information can be transmitted on CC2. For another example, if the carrier on which PC5-S is located is CC3, the first indication information can be transmitted on CC3. For another example, if the carriers used for sidelink communication between the first communication device and the second communication device include CC1, CC2, and CC3, where the primary carrier is CC3, the first indication information can be transmitted on CC3.

[0151] For another example, if the third indication information sent by the first communication device to the second communication device indicates that CC4 is the second carrier, the second communication device may send the first indication information on CC4, and the first communication device may monitor and receive the first indication information on CC4.

[0152] For another example, if the third indication information sent by the second communication device to the first communication device indicates that CC5 is the second carrier, the second communication device may send the first indication information on CC5, and the first communication device may monitor and receive the first indication information on CC5.

[0153] In one implementation, the primary carrier is determined in at least one of the following ways:

[0154] fourth indication information sent by the first communication device or the second communication device, where the fourth indication information is used to indicate the primary carrier;

[0155] The carrier on which the Direct Communication Request (DCR) information and / or Direct Communication Accept (DCA) information is sent during the unicast link establishment process;

[0156] The carrier where PC5 signaling (PC5-S) is located;

[0157] Preconfiguration information;

[0158] Network configuration information;

[0159] Carrier index information.

[0160] For example, the primary carrier can be first determined based on the fourth indication information sent by the first communication device or the second communication device. For another example, if the carrier where the DCR information is located during the unicast link establishment process is CC1, CC1 can be determined as the primary carrier. For another example, if the carrier where the DCA information is located during the unicast link establishment process is CC2, CC2 can be determined as the primary carrier. For another example, if the carrier where PC5-S is located is CC3, CC3 can be determined as the primary carrier. For another example, if the carrier index information includes CC4, CC4 can be determined as the primary carrier. For another example, if the primary carrier indicated in the pre-configuration information or network configuration information is CC5, CC5 is determined as the primary carrier.

[0161] In one embodiment, the second communication device is a network device, and the first communication device is a first terminal device. In this embodiment, the first indication information is carried in DCI, MAC CE, or RRC signaling; the second indication information is carried in RRC signaling. For example, after the first terminal device sends the second indication information to the network device via RRC signaling, it can receive the first indication information from the network device via DCI, MAC CE, or RRC signaling. After receiving the first indication information, the first terminal device can activate or deactivate one or more first carriers, and then use the activated carriers to communicate with the second terminal device.

[0162] In one embodiment, the first carrier includes at least one of the following:

[0163] Carriers supported by sideline transmission;

[0164] a carrier corresponding to the first service type;

[0165] Carrier corresponding to the signaling type;

[0166] The first service type is a service type corresponding to the sideline transmission between the first communication device and the second communication device, and the signaling type includes PC5-RRC signaling, PC5-S signaling, DCR information or DCA information.

[0167] For example, the carriers supported by the sidelink transmission between the first communication device and the second communication device are CC1, CC2 and CC3, and the first indication information may indicate that one or more of CC1, CC2 and CC3 are activated or deactivated.

[0168] For another example, the sidelink transmission between the first communication device and the second communication device corresponds to a first service type, and the carriers corresponding to the service type are CC4 and CC5. The first indication information can indicate that CC4 and / or CC5 are activated or deactivated.

[0169] For another example, the carriers corresponding to the signaling type between the first communications device and the second communications device include at least one of the following: PC5-RRC signaling corresponding to carrier CC6, PC5-S signaling corresponding to carrier CC7, DCR information corresponding to carrier CC8, and DCA information corresponding to carrier CC9. If the first indication information indicates that CC7 is activated, the second communications device may transmit PC5-S signaling via CC7, and the first communications device may monitor the PC5-S signaling on CC7. If the first indication information indicates that CC8 is activated, the second communications device may transmit DCR information via CC8, and the first communications device may monitor the DCR information on CC8.

[0170] In one embodiment, the first indication information includes at least one of the following:

[0171] Indication bit, used to indicate activation or deactivation;

[0172] A bitmap used to indicate the carrier or carrier set that needs to be activated or deactivated;

[0173] One or more carrier indexes, used to indicate one or more carriers that need to be activated or deactivated.

[0174] In the embodiment of the present application, the indicator bit is used to indicate activation or deactivation, and can also be understood as indicating sleep or wake-up, indicating activation or sleep, etc. The meanings of activation, wake-up, and exit from sleep in the embodiment of the present application are similar; the meanings of deactivation, sleep, and non-wake-up are similar. For example, if the value of the indicator bit used to indicate activation or deactivation in the first indication information is 1, it indicates activation of one or more side carriers; the value is 0, which indicates deactivation of one or more side carriers. Conversely, the value of the indicator bit can also be 1, which indicates deactivation of one or more side carriers; the value is 0, which indicates activation of one or more side carriers.

[0175] In an embodiment of the present application, the indicator bit, the bitmap, and the carrier index can individually indicate that one or more sidecarriers are activated or deactivated, or can be combined to indicate that one or more sidecarriers are activated or deactivated. For example, sidecar transmission supports four carriers CC1, CC2, CC3, and CC4. The first indication information only includes a bitmap. The bitmap includes four bits, which correspond to the four carriers respectively. If the bitmap takes a value of 1110, the first three bits 111 indicate that carriers CC1, CC2, and CC3 are in an activated state, and the last bit 0 indicates that the corresponding carrier CC4 is in a dormant state. For another example, sidecar transmission supports five carriers CC1, CC2, CC3, CC4, and CC5. The first indication information includes an indicator bit and a bitmap. The bitmap includes five bits, which correspond to the five carriers respectively. If the indicator bit is 1, the bitmap is 11101, which indicates that carriers CC1, CC2, CC3, and CC5 are activated. For another example, sidecar transmission supports four carriers CC1, CC2, CC3, and CC4. The first indication information includes an indicator bit and carrier index information. If the indicator bit is 0, the carrier index information includes the index corresponding to CC1, indicating that the carrier CC1 is deactivated; if the indicator bit is 0, the carrier index information includes the indexes corresponding to carriers CC1, CC2 and CC3, indicating that the carriers CC1, CC2 and CC3 are deactivated.

[0176] In one embodiment, the carrier or carrier set corresponding to each bit of the bitmap does not include a second carrier, wherein the second carrier is the carrier where the first indication information is located. In an embodiment of the present application, each bit of the bitmap may correspond to a carrier. For example, in the bitmap 1110, the four bits correspond to CC1, CC2, CC3, and CC4, respectively. Each bit of the bitmap may also correspond to a carrier set. These four carriers may not carry the first indication information. For another example, the first bit in the bitmap 1110 corresponds to CC1 and CC2, the second bit corresponds to CC3 and CC4, the third bit corresponds to C5, and the third bit corresponds to C6. These six carriers may not carry the first indication information.

[0177] In one embodiment, the correspondence between the bitmap and the carrier or carrier set is determined based on pre-configuration information, network configuration information, and indication information from the first communication device or the second communication device. For example, the first terminal device determines the correspondence between the bitmap and the carrier or carrier set based on pre-configuration information or network configuration information from the network device. For another example, the first terminal device determines the correspondence between the bitmap and the carrier or carrier set based on indication information from the network device or the second terminal device.

[0178] In one embodiment, whether one or more carriers corresponding to the one or more carrier indices are activated or deactivated is determined based on the value of the indicator bit. For example, if the value of the indicator bit is 1, the carrier corresponding to the carrier index is activated. If the value of the indicator bit is 0, the carrier corresponding to the carrier index is deactivated.

[0179] In one embodiment, the transmission resource of the first indication information is determined based on at least one of protocol predefined information, preconfigured information, network configuration information, indication information from the first communications device, and indication information from the second communications device. For example, the first terminal device determines the transmission resource of the first indication information based on network configuration information from the network device. For another example, the first terminal device determines the transmission resource of the first indication information based on indication information from the network device or the second terminal device.

[0180] In one embodiment, the transmission resource of the first indication information is determined according to at least one of the following information:

[0181] identification information of the first communication device;

[0182] identification information of the second communication device;

[0183] Carrier identification information;

[0184] activation or deactivation information included in the first indication information;

[0185] The carrier identification information includes identification information of the first carrier and / or identification information corresponding to the carrier where the transmission resource of the first indication information is located.

[0186] The transmission resources of the first indication information may include time domain resources, frequency domain resources and / or code domain resources.

[0187] For example, the resource set that can be used to transmit the first indication information includes K transmission resources, which can be obtained based on the identification information ID1 of the first communication device, the identification information ID2 of the second communication device, the carrier index CC where the transmission resource of the first indication information is located, and the carrier index CC where the transmission resource of the first indication information is located. Index , and the value v corresponding to the indicator bit of the first indication information determines the index I corresponding to the transmission resource of the first indication information, for example, I=(ID1+ID2+CC Index +v) mod K. According to the index I, a specific transmission resource can be determined in the resource set that can be used to transmit the first indication information.

[0188] In one embodiment, the first indication information is carried by a sequence; wherein the first indication information carried by the first sequence indicates activation of the first carrier; or the first indication information carried by the second sequence indicates deactivation of the first carrier. For example, a first communications device receives a first sequence from a second communications device and can parse the first sequence to obtain the first indication information. For another example, the first communications device can send a second sequence to the second communications device, and the second communications device can parse the second sequence to obtain the second indication information. The first communications device can send the first sequence to the first communications device based on the second indication information. The first communications device can parse the first sequence to obtain the first indication information.

[0189] FIG11 is a schematic flow chart of a sideline communication method 1100 according to an embodiment of the present application. The method can optionally be applied to the systems shown in FIG1 to FIG7 , but is not limited thereto. The method includes at least part of the following contents.

[0190] S1110. The second communication device sends first indication information to the first communication device, where the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

[0191] FIG12 is a schematic flow chart of a sideline communication method 1200 according to another embodiment of the present application. The method may include one or more features of the above method. In one embodiment, the method further includes:

[0192] S1210. The second communication device receives second indication information from the first communication device, where the second indication information is used to request the second communication device to activate or deactivate one or more first carriers.

[0193] In one embodiment, the second indication information is used to indicate at least one of the following:

[0194] Instruction information for activating or deactivating the one or more first carriers;

[0195] Carrier information of the one or more first carriers.

[0196] In one implementation, the first communication device is a first terminal device, and the second communication device is a second terminal device.

[0197] In one embodiment, the first indication information is carried in SCI, sidelink reference signal, sidelink feedback control channel PSFCH, MAC CE or PC5-RRC signaling; wherein, the sidelink reference signal carrying the first indication information includes DMRS, CSI-RS or synchronization signal.

[0198] In one embodiment, S1110, the second communication device sending first indication information to the first communication device includes:

[0199] S1220: The second communication device sends the first indication information to the first communication device on a second carrier, where the second carrier is different from the first carrier, or the second carrier is one of the one or more first carriers.

[0200] In one embodiment, when the first indication information is carried in an SCI or a MAC CE, the method further includes:

[0201] S1230. The second communication device receives side feedback information from the first communication device.

[0202] S1240: The second communication device determines, based on the sidelink feedback information, whether the first communication device has correctly received the first indication information, and / or whether the one or more first carriers are activated or deactivated.

[0203] In one implementation, the second carrier includes at least one of the following:

[0204] A carrier used when the first communication device and the second communication device utilize one carrier for sidelink transmission;

[0205] PC5-carrier used for RRC signaling transmission;

[0206] The carrier where the DCR information is located.

[0207] In one implementation, the second carrier is determined in at least one of the following ways:

[0208] The carrier where the DCR information and / or DCA information is located during unicast link establishment;

[0209] The carrier where PC5-S is located;

[0210] Main carrier;

[0211] The third indication information sent by the first communication device and the second communication device is used to indicate the second carrier.

[0212] In one implementation, the primary carrier is determined in at least one of the following ways:

[0213] fourth indication information sent by the first terminal or the second terminal, where the fourth indication information is used to indicate the primary carrier;

[0214] The carrier where the DCR information and / or DCA information is located during unicast link establishment;

[0215] The carrier where PC5-S is located;

[0216] Preconfiguration information;

[0217] Network configuration information;

[0218] Carrier index information.

[0219] In one implementation, the second communication device is a network device, and the first communication device is a first terminal device.

[0220] In one implementation, the first indication information is carried in DCI, MAC CE or RRC signaling; the second indication information is carried in RRC signaling.

[0221] In one embodiment, the carriers allowed to be activated or deactivated include at least one of the following:

[0222] Carriers supported by sideline transmission;

[0223] a carrier corresponding to the first service type;

[0224] Carrier corresponding to the signaling type;

[0225] The first service type is a service type corresponding to the sideline transmission between the first communication device and the second communication device, and the signaling type includes PC5-RRC signaling, PC5-S signaling, DCR information or DCA information.

[0226] In one embodiment, the first indication information includes at least one of the following:

[0227] Indication bit, used to indicate activation or deactivation;

[0228] A bitmap used to indicate the carrier or carrier set that needs to be activated or deactivated;

[0229] One or more carrier indexes, used to indicate one or more carriers that need to be activated or deactivated.

[0230] In one implementation, the carrier or carrier set corresponding to each bit of the bitmap does not include the second carrier.

[0231] In one implementation, the correspondence between the bitmap and the carrier or carrier set is determined according to pre-configuration information, network configuration information, and indication information of the first terminal or the second communication device.

[0232] In one implementation, whether one or more carriers corresponding to the one or more carrier indexes are activated or deactivated is determined according to the value of the indicator bit.

[0233] In one embodiment, the transmission resource of the first indication information is determined based on at least one of protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, and indication information of the second communication device.

[0234] In one embodiment, the transmission resource of the first indication information is determined according to at least one of the following information:

[0235] identification information of the first communication device;

[0236] identification information of the second communication device;

[0237] Carrier identification information;

[0238] activation or deactivation information included in the first indication information;

[0239] The carrier identification information includes identification information of the first carrier and / or identification information corresponding to the carrier where the transmission resource of the first indication information is located.

[0240] In one embodiment, the first indication information is carried by a sequence; wherein the first indication information carried by the first sequence indicates activation of the first carrier; or the first indication information carried by the second sequence indicates deactivation of the first carrier.

[0241] For specific examples of the sideline communication methods 1100 and 1200 executed by the second communication device in this embodiment, reference can be made to the relevant descriptions of the second communication device in the above methods 900 and 1000 , which will not be repeated here for the sake of brevity.

[0242] FIG13 is a schematic flow chart of a sideline communication method 1300 according to an embodiment of the present application. The method can optionally be applied to the systems shown in FIG1 to FIG7 , but is not limited thereto. The method includes at least part of the following contents.

[0243] S1310: The first communications device determines, based on a timer, whether the first carrier is an activated carrier or a dormant carrier.

[0244] In an embodiment of the present application, a first communication device may be a terminal device in a sidecar communication system. A timer may be preconfigured in the terminal device or configured via the network to determine whether a first carrier is an active carrier or a dormant carrier. Determining whether a first carrier is an active carrier or a dormant carrier can also be understood as activating or deactivating one or more first carriers, or determining whether one or more first carriers are activated or deactivated, or waking up one or more first carriers, or determining whether one or more first carriers are dormant carriers. There may be one or more timers, and the timer duration may be set based on specific needs. For example, the timer duration may be determined based on a preset value, protocol predefined information, preconfigured information, network configuration information, or instructions from the first or second communication device. For example, in a sidecar multi-carrier system, sidecar transmission may support multiple carriers. Timer-based carrier activation or deactivation allows a first communication device, such as a terminal device, to flexibly monitor the required carriers. For example, when sidecar transmission does not require multiple carriers, timer-based carrier deactivation allows the terminal device to monitor only a few carriers, achieving energy savings. When sideline transmission needs to be performed on more carriers, the carriers can be activated based on a timer, and the terminal device can listen to or monitor more carriers to improve the sideline transmission throughput or reliability.

[0245] FIG14 is a schematic flow chart of a sideline communication method 1400 according to another embodiment of the present application. The method may include one or more features of the above-mentioned method 1300. In one embodiment, the method 1400 further includes:

[0246] S1410: Start or restart a first timer.

[0247] In one implementation, S1310, the first communications device determining, based on a timer, whether the first carrier is an activated carrier or a dormant carrier, includes:

[0248] S1420: Before the first timer expires, the first communication device does not receive or successfully detect the sidelink information sent by the second communication device on the first carrier. The first communication device determines that the first carrier is a dormant carrier, or deactivates the first carrier.

[0249] In one embodiment, the method further comprises:

[0250] S1430: Start or restart the second timer.

[0251] In one implementation, S1310, the first communications device determines, based on a timer, whether the first carrier is an activated carrier or a dormant carrier, further comprising:

[0252] S1440: When the second timer expires, the first communications device determines that the first carrier is in an active state, activates the first carrier, wakes up the first carrier, or exits the dormant state of the first carrier. The first communications device begins monitoring the sidelink control information sent by the second communications device or detecting the sidelink information sent by the second communications device on the first carrier. If the sidelink communication process is not completed, the process returns to S1410 to begin a new cycle.

[0253] Figure 15 is a schematic flow chart of a sideline communication method 1500 according to another embodiment of the present application. This method may include one or more features of the aforementioned method 1300. In one embodiment, S1310, a first communication device determining, based on a timer, whether a first carrier is an activated carrier or a dormant carrier, includes: the first communication device determining, based on a timer and a counter, whether the first carrier is an activated carrier or a dormant carrier. In this embodiment of the present application, a counter may be used to extend the timing duration.

[0254] In one embodiment, the method 1500 further includes:

[0255] S1510: Start or restart a first timer. The first timer in this embodiment and the first timer in the previous embodiment may be the same timer or different timers. For example, the durations of the first timer in this embodiment may be different, and the duration of the first timer in the previous embodiment may be smaller than the duration of the first timer in the previous embodiment.

[0256] In one embodiment, the method 1500 further includes:

[0257] S1520: Before the first timer expires, the first communications device receives or successfully detects sidelink information sent by the second communications device on the first carrier, and resets the value of the first counter. The process then returns to S1510 and restarts the first timer. The first counter may be used to indicate the number of consecutive expiration times of the first timer.

[0258] In one embodiment, the method 1500 further includes:

[0259] S1530: Before the first timer expires, if the first communication device does not receive or successfully detect the sidelink information sent by the second communication device on the first carrier, the first counter is increased, and then the process returns to S1510 to restart the first timer.

[0260] In one embodiment, the first communications device determines, based on a timer and a counter, whether the first carrier is an activated carrier or a dormant carrier, further comprising:

[0261] S1540: If the value of the first counter is greater than or equal to the first threshold, the first communications device determines that the first carrier is a dormant carrier or deactivates the first carrier. In this step, it may be determined whether the value of the first counter is greater than or equal to the first threshold. If so, S1540 is executed and then S1550 is executed. Otherwise, the process returns to determine whether the first timer has expired and then executes S1520 or S1530.

[0262] For example, if the duration of the first timer is T1 and the first threshold value of the first counter is n, if the first communication device fails to successfully detect the sidelink information sent by the second communication device within the duration of T1×n, it can be determined that the first carrier is a dormant carrier, or the first carrier is deactivated.

[0263] In one implementation, the first threshold is determined according to protocol predefined information, preconfigured information, network configuration information, indication information of the first communication device, or indication information of the second communication device.

[0264] In one embodiment, the method 1500 further includes:

[0265] S1550: Start or restart the second timer.

[0266] In one embodiment, the first communications device determines, based on a timer, whether the first carrier is an activated carrier or a dormant carrier, further comprising:

[0267] S1560: When the second timer expires, the first communication device determines that the first carrier is in an activated state, or activates the first carrier, or wakes up the first carrier, or the first carrier exits a dormant state. The first communication device begins to monitor the sideline control information sent by the second communication device or detects the sideline information sent by the second communication device on the first carrier. If the sideline communication process is not completed, the process may return to S1510 to restart the first timer, and may also reset the first counter to start a new cycle.

[0268] FIG16 is a schematic flow chart of a sideline communication method 1600 according to another embodiment of the present application. The method may include one or more features of the above methods 1300, 1400, and 1500. In combination with method 1400 or 1500, in one embodiment, the method further includes:

[0269] S1610. The first communication device receives first indication information sent by the second communication device, where the first indication information is used to indicate that the first carrier is in an activated state, or to activate the first carrier, or to wake up the first carrier, or to exit a dormant state. This step may be performed after S1410 and before S1440 ends. This step may be performed after S1510 and before S1560 ends.

[0270] In one embodiment, the method further includes: S1620, starting or restarting the first timer. If the first communication device receives the first indication information during the execution of method 1400 or 1500, it may execute S1620 (similar to S1410 or S1510) to restart the first timer and then execute S1420, or restart the first timer and reset the first counter and then execute S1520 or execute S1530 to restart a new cycle.

[0271] In one implementation, the first indication information is transmitted on the second carrier.

[0272] In one embodiment, the first indication information is carried by at least one of the following: SCI (e.g., first-order SCI or second-order SCI), sidelink reference signal, and PSFCH. The sidelink reference signal carrying the first indication information may include DMRS, CSI-RS, or synchronization signal.

[0273] In one embodiment, the transmission resource of the first indication information is determined based on at least one of protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, and indication information of the second communication device.

[0274] In one embodiment, the transmission resource of the first indication information is determined according to at least one of the following information:

[0275] identification information of the first communication device;

[0276] identification information of the second communication device;

[0277] Carrier identification information;

[0278] activation or deactivation information included in the first indication information;

[0279] The carrier identification information includes identification information of the first carrier and / or identification information corresponding to the carrier where the transmission resource of the first indication information is located.

[0280] The transmission resources of the first indication information may include time domain resources, frequency domain resources and / or code domain resources.

[0281] In one embodiment, the first indication information is carried by a sequence; wherein the first indication information carried by the first sequence indicates activation of the first carrier; or the first indication information carried by the second sequence indicates deactivation of the first carrier.

[0282] In the embodiment of the present application, the specific explanation and examples of the first indication information can be found in the relevant description of the above method embodiment, which will not be repeated here.

[0283] In an application scenario such as a sidelink multi-carrier system, when sidelink transmission does not need to be performed on multiple carriers, the carriers can be activated or deactivated so that the terminal only needs to monitor a few carriers, thereby achieving energy saving.

[0284] Optionally, the sidecarrier activation or deactivation is applicable to a unicast or multicast transmission mode.

[0285] Example 1: Activating or deactivating a sidecar carrier based on signaling instructions

[0286] In this example, the sidecarrier being deactivated may indicate that the carrier is a dormant carrier, or that the terminal does not need to perform SCI monitoring or PSCCH monitoring on the carrier, or that the terminal does not need to detect sidecar transmissions on the carrier. Optionally, a carrier may be deactivated by indicating that the carrier is a dormant carrier. The sidecarrier being activated may indicate that the carrier is an activated carrier, or that the carrier is woken up, or that the terminal needs to perform SCI monitoring or PSCCH monitoring on the carrier, or that the terminal needs to detect sidecar transmissions on the carrier. Optionally, a carrier may be deactivated or woken up by indicating that the carrier is an activated carrier.

[0287] For example, the first terminal and the second terminal are two terminals that perform sideline transmission.

[0288] Optionally, the first terminal obtains first indication information, and determines, according to the first indication information, that the first carrier is a dormant carrier, or determines, according to the first indication information, that the first carrier is deactivated.

[0289] Optionally, the first terminal obtains the first indication information in one or more of the following ways: network indication information, indication information of the second terminal.

[0290] Method 1: If the first terminal obtains the first indication information through the network, the first terminal may send second indication information to the network, where the second indication information includes at least one of the following information:

[0291] Instruction information for activating or deactivating a sidecar carrier: for example, the instruction information includes activation instruction information or deactivation instruction information;

[0292] Carrier information for activating or deactivating a carrier: For example, the indication information includes third carrier information, and further, the indication information includes index information of the third carrier. The third carrier and the first carrier may be the same carrier or different carriers. If the third carrier and the first carrier are the same carrier, that is, the first terminal sends a second indication information to the network device, requesting activation or deactivation of a certain carrier. The network device determines to activate or deactivate the carrier based on the second indication information, and sends a first indication information to the first terminal, instructing activation or deactivation of the carrier. If the third carrier and the first carrier are different carriers, that is, the first terminal sends a second indication information to the network device, requesting activation or deactivation of a certain carrier. The network device obtains the second indication information, but the network device decides to activate or deactivate another carrier, and sends a first indication information to the first terminal device, instructing activation or deactivation of the other carrier.

[0293] In this manner, the first indication information may be carried in DCI, MAC CE or RRC signaling; the second indication information may be carried in RRC signaling.

[0294] Method 2: If the first terminal obtains the first indication information through the second terminal, the first terminal may also send second indication information to the second terminal. The second indication information may include at least one of the following information:

[0295] Instruction information for activating or deactivating a sidecar carrier: for example, the instruction information includes activation instruction information or deactivation instruction information;

[0296] Carrier information for activating or deactivating a carrier: For example, the indication information includes third carrier information, and further, the indication information includes index information of the third carrier. The third carrier and the first carrier may be the same carrier or different carriers. If the third carrier and the first carrier are the same carrier, that is, the first terminal sends second indication information to the second terminal, requesting activation or deactivation of a certain carrier. The second terminal determines to activate or deactivate the carrier based on the second indication information, and sends first indication information to the first terminal, instructing activation or deactivation of the carrier. If the third carrier and the first carrier are different carriers, that is, the first terminal sends second indication information to the second terminal, requesting activation or deactivation of a certain carrier, the second terminal obtains the second indication information, but the second terminal decides to activate or deactivate another carrier, and sends first indication information to the first terminal device, instructing activation or deactivation of the other carrier.

[0297] In this manner, the first indication information can be carried in SCI (first-order SCI or second-order SCI), MAC CE or PC5-RRC signaling. When the first indication information is carried in SCI or MAC CE, side feedback can be activated. For example, when the second terminal sends the first indication information to the first terminal, the side feedback is activated. When the first terminal receives the first indication information, it needs to send feedback information (ACK or NACK) to the second terminal. The second terminal can determine whether the first terminal correctly receives the first indication information based on the feedback information, and then determine whether the first carrier is activated or deactivated.

[0298] In this manner, the first terminal obtains the first indication information sent by the second terminal on a second carrier. The second carrier and the first carrier may be the same or different carriers. For example, the second carrier is a primary carrier (Pcarrier), the first carrier is a secondary carrier (Scarrier), and the second terminal sends the first indication information on the primary carrier to activate or deactivate the secondary carrier.

[0299] Optionally, the second carrier may be a carrier used when the first terminal and the second terminal use only one carrier for sidelink transmission, or a carrier used for PC5-RRC signaling transmission, or a carrier where direct communication request (DCR) signaling is located;

[0300] Optionally, the second carrier may be determined by one or more of the following methods:

[0301] The carrier where the DCR information and / or DCA (direct communication accept, DCA) information is located during the unicast link establishment process;

[0302] The carrier where PC5 signaling (PC5-S) is located;

[0303] Main carrier;

[0304] The indication information sent by the first terminal or the second terminal is used to indicate the second carrier information. For example, the sideline transmission system supports four carriers, including CC1, CC2, CC3 and CC4. The first terminal and the second terminal are two terminals performing unicast communication. After the unicast link is established, the first terminal sends indication information to the second terminal (or the second terminal sends indication information to the first terminal), such as PC5-RRC signaling, in which CC1 is indicated as the second carrier, or CC1 is indicated as the primary carrier, and the primary carrier is the second carrier.

[0305] Optionally, the first terminal and the second terminal determine a primary carrier among the multiple carriers by one or more of the following methods:

[0306] Indication information sent by the first terminal or the second terminal, where the indication information is used to indicate primary carrier information;

[0307] The carrier where the DCR information and / or DCA information is located during unicast link establishment;

[0308] The carrier where PC5-S is located;

[0309] Pre-configuration information or network configuration information;

[0310] Carrier index information.

[0311] Optionally, the multiple carriers used by the first terminal and the second terminal for side transmission can be determined in the following manner: the service type or signaling type corresponding to the side transmission: for example, if the side transmission is the first service type, the carriers corresponding to the side transmission include carrier 1 and carrier 2; if the side transmission is the second service type, the carriers corresponding to the side transmission include carrier 1 and carrier 3; if the side transmission is PC5-RRC signaling, the carriers corresponding to the side transmission include carrier 1; if the side transmission is PC5-S signaling, the carriers corresponding to the side transmission include carrier 2 and carrier 3.

[0312] Optionally, an example of an action performed by the first terminal after receiving the first indication information is as follows:

[0313] Example 1: If the first terminal obtains the first indication information at time T0, and the first indication information indicates that the first carrier is a dormant carrier (or, the first indication information indicates deactivation of the first carrier), then the first terminal does not expect to receive the SCI or PSSCH sent by the second terminal on the first carrier after time T0+Td1.

[0314] If the first terminal obtains the first indication information at time T1, and the first indication information indicates that the first carrier exits the sleep state (or, the first indication information indicates the activation of the first carrier), the first terminal does not expect to receive the SCI or PSSCH sent by the second terminal on the first carrier before time T1+Td2; or, the first terminal expects to receive the SCI or PSSCH sent by the second terminal on the first carrier after time T1+Td2; or, the first terminal starts to monitor the SCI or PSCCH sent by the second terminal on the first carrier, or receive the PSSCH sent by the second terminal after time T1+Td2.

[0315] The time moments T0 and T1 may be determined according to the starting position or the ending position of the time slot where the first indication information is located.

[0316] As shown in Figure 17a, the second terminal sends first indication information to instruct the deactivation of the first carrier. If the first terminal receives the first indication information to instruct the deactivation of the first carrier at time T0, it deactivates the first carrier after Td1. When the first carrier is deactivated, the second terminal may send first indication information to instruct the activation of the first carrier. If the first terminal receives the first indication information to instruct the activation of the first carrier at time T1, it activates the first carrier after Td2. Then, the second terminal may transmit SCI on the first carrier.

[0317] Example 2: If the first terminal obtains the first indication information at time T0, and the first indication information indicates that the first carrier is a dormant carrier (or, the first indication information indicates to deactivate the first carrier), the first terminal does not expect to receive the SCI or PSSCH sent by the second terminal on the first carrier after the first time T1. The first time T1 = T2 + Td1 or T1 = T2 + Td1 + b. The second time T2 can be equal to T0, or it can be calculated based on T0, for example, T2 = T0 + a. Among them, a, b, and Td1 can be preset values ​​or values ​​determined according to pre-configuration information and network configuration information.

[0318] If the first terminal obtains the first indication information at time T5, and the first indication information indicates that the first carrier exits the dormant state (or the first indication information indicates that the first carrier is activated), then the first terminal does not expect to receive the SCI or PSSCH sent by the second terminal on the first carrier before the third time T3; or, the first terminal expects to receive the SCI or PSSCH sent by the second terminal on the first carrier after the third time T3; or, the first terminal begins to monitor the SCI or PSCCH sent by the second terminal, or receive the PSSCH sent by the second terminal, on the first carrier after the third time T3. The third time T3 = T4 + Td2, or T3 = T4 + Td2 + d. T4 can be equal to T5 or calculated based on T5. For example, T4 = T5 + c. c, d, and Td2 can be preset values ​​or values ​​determined based on pre-configured information or network configuration information. The time points T0 and T5 can be determined based on the start or end position of the timeslot in which the first indication information is located.

[0319] As shown in Figure 17b, the second terminal sends a first indication message to instruct the deactivation of the first carrier. If the first terminal receives the first indication message to instruct the deactivation of the first carrier at time T0, it can deactivate the first carrier at time T1 = T2 + Td1 + b = T0 + a + Td1 + b. When the first carrier is in the deactivated state, the second terminal may send a first indication message to instruct the activation of the first carrier. If the first terminal receives the first indication message to instruct the activation of the first carrier at time T5, it can activate the first carrier at time T3 = T4 + Td2 + d = T5 + c + Td2 + d. Then, the second terminal can transmit the SCI on the first carrier.

[0320] Td1 or Td2 in the above example can be determined by one or more of the following methods: protocol predefined information, preconfigured information, network configuration information, indication information of the first terminal, indication information of the second terminal, and processing time of the terminal.

[0321] Optionally, the following are several examples of the content of the first indication information.

[0322] For example, the first indication information may include:

[0323] (1) First bit:

[0324] When the value is 1, it indicates activation (active) or wake-up (wake-up); when the value is 0, it indicates deactivation (deactive) or dormant (dormant);

[0325] (2) First bitmap:

[0326] Each bit corresponds to a carrier or a carrier set; optionally, the carrier or the carrier set corresponding to each bit does not include a second carrier; optionally, the correspondence between the bit map and the carrier or the carrier set is determined according to pre-configuration information, network configuration information, and indication information of the first terminal or the second terminal.

[0327] For another example, the first indication information includes N information fields, each of which includes:

[0328] (1) First bit:

[0329] When the value is 1, it indicates activation (active) or wake-up (wake-up); when the value is 0, it indicates deactivation (deactive) or dormant (dormant);

[0330] (2) Carrier index information: Whether the carrier corresponding to the carrier index is activated or deactivated is determined by the value of the first bit. For example, if there are 8 carriers in total, 000 indicates carrier 1, 0001 indicates activated carrier 1, or 1000 indicates activated carrier 1.

[0331] For another example, the first indication information includes:

[0332] (1) First bit:

[0333] When the value is 1, it indicates activation (active) or wake-up (wake-up); when the value is 0, it indicates deactivation (deactive) or dormant (dormant);

[0334] (2) One or more carrier index information: Whether one or more carriers corresponding to the one or more carrier indexes are activated or deactivated is determined according to the value of the first bit.

[0335] Example 1: As shown in Figure 17c, UE1 and UE2 are two terminals performing unicast communication, and UE1 and UE2 support multi-carrier transmission. First, UE1 and UE2 establish a unicast communication link, and UE1 and UE2 determine to use 4 carriers (i.e., CC1 to CC4) for side transmission, where CC1 is the main carrier. In subsequent side transmissions, UE1 and UE2 use CC1 to CC4 for side transmission. When there is no side data to be transmitted between UE1 and UE2, UE1 sends a first indication message to UE2, indicating that CC2, CC3, and CC4 are dormant carriers, that is, UE1 and UE2 will not use CC2, CC3, and CC4 for side transmission, and UE1 activates side feedback when sending the first indication message. If UE2 receives the first indication message and sends an ACK message to UE1, UE1 and UE2 will only use CC1 for side transmission, such as using CC1 to transmit a heartbeat (keep-alive) signal to determine whether a radio link failure (RLF) occurs in the current unicast link. When sidelink data needs to be transmitted between UE1 and UE2, UE1 sends a first indication message to UE2, instructing CC3 to exit the dormant carrier, or activate CC3, and activate sidelink feedback. If UE2 receives the first indication message and sends an ACK message to UE1, UE1 and UE2 can use CC1 and CC3 for sidelink transmission.

[0336] Example 2: Activating or deactivating a sidecar carrier based on a timer

[0337] The first terminal determines whether the first carrier is an activated carrier or a dormant carrier according to the timer and the counter.

[0338] As shown in FIG17 d , for the first carrier, the first timer may be started first.

[0339] 1. Before the first timer expires (or times out), if the first terminal does not receive or successfully detect the SCI sent by the second terminal on the first carrier, the value of the first counter is increased by 1 and the first timer is restarted.

[0340] If the value of the first counter is greater than or equal to the first threshold, the first terminal may determine that the first carrier is a dormant carrier or deactivate the first carrier. Optionally, a second timer is started or restarted.

[0341] The first threshold is determined according to protocol predefined information, preconfigured information, network configuration information, indication information of the second terminal, or indication information of the first terminal.

[0342] 2. Before the first timer expires (or times out), if the first terminal receives or successfully detects the SCI sent by the second terminal on the first carrier, the value of the first counter is reset. Optionally, the first timer is restarted.

[0343] 3. Optionally, if the second timer fails (or times out), the first terminal may determine that the first carrier exits the dormant state or activates the first carrier. The first terminal may also restart the first timer.

[0344] 4. Optionally, if the first terminal receives the first indication information before the second timer expires (or times out), the first terminal may determine that the first carrier exits the dormant state or activates the first carrier. Then, the first terminal may also restart the first timer.

[0345] Optionally, the first terminal receives the first indication information on the second carrier.

[0346] The first indication information is carried by SCI, MAC CE, PC5-RRC signaling, a sidelink reference signal, or a PSFCH channel; wherein the sidelink reference signal includes a demodulation reference signal DMRS or a channel state information reference signal CSI-RS or a synchronization signal;

[0347] The transmission resource of the first indication information is determined according to protocol predefined information, preconfigured information, network configuration information, indication information of the first terminal or indication information of the second terminal;

[0348] The transmission resources (including time domain resources, frequency domain resources, and code domain resources) of the first indication information are determined according to one or more of the following information:

[0349] Identification information of the first terminal: the identification information of the first terminal is determined, for example, according to a source identifier in the SCI sent by the first terminal to the second terminal;

[0350] Identification information of the second terminal: the identification information of the second terminal is determined, for example, according to the destination identifier in the SCI sent by the first terminal to the second terminal;

[0351] Carrier identification information: such as carrier index information;

[0352] Indication content of the first indication information: for example, the first indication information indicates activation or deactivation of the first carrier, and the first indication information is carried by a sequence. When the first indication information indicates activation of the first carrier, it corresponds to the first sequence; when the first indication information indicates deactivation of the first carrier, it corresponds to the second sequence.

[0353] Example 2: As shown in Figure 17e, UE1 and UE2 perform unicast communication. UE1 and UE2 utilize one or more carriers for sidelink transmission, with the first carrier being one of the carriers. Timer1 and Timer2 represent the first timer and the second timer, respectively. Cnt represents the first counter, and the first threshold value is 2. At time a, the first terminal starts the first timer Timer1 and initializes the first counter to 0. At time b, before the first timer expires, the first terminal receives an SCI sent by the second terminal. The first terminal restarts the first timer Timer1 and resets the first counter value to 0. Timer1 expires at time c. Before this, the first terminal has not received an SCI sent by the second terminal. The first counter value is incremented by 1, and Timer1 is restarted. Timer1 expires at time d. Before this, the first terminal has not received an SCI sent by the second terminal. The first counter value is incremented by 1. At this time, the first counter value is 2, which is equal to the first threshold value. The first terminal determines that the first carrier is a dormant carrier or deactivates the first carrier and starts the second timer Timer2. Timer2 expires at time e. When Timer2 expires, the first terminal determines that the first carrier exits the dormant state or enters the active state, and restarts the first timer Timer1, resetting the first counter to 0.

[0354] The embodiment of the present application activates or deactivates the sidecarrier based on indication information or a timer, and can flexibly configure the number of carriers used for sidecar transmission, thereby reducing power consumption or improving communication throughput or reliability.

[0355] FIG18 is a schematic block diagram of a first communication device 1800 according to an embodiment of the present application. The first communication device 1800 may include:

[0356] Receiving unit 1801 is used to receive first indication information sent by a second communication device, where the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

[0357] FIG19 is a schematic block diagram of a first communication device 1900 according to another embodiment of the present application. The device may include one or more features of the above-mentioned device. In one embodiment, the device further includes:

[0358] The processing unit 1901 is configured to activate or deactivate one or more first carriers based on the first indication information, or determine whether one or more first carriers are activated or deactivated, or determine whether one or more first carriers are dormant carriers.

[0359] In one embodiment, the first communications device deactivates one or more first carriers based on the first indication information, or determines that one or more first carriers are deactivated, or determines that one or more first carriers are dormant carriers, including at least one of the following:

[0360] The first communication device does not expect to receive the sidelink information sent by the second communication device on the first carrier after the first moment;

[0361] The first communication device does not expect to monitor the sideline control information sent by the second communication device on the first carrier after the first moment;

[0362] The first moment is determined based on the second moment and the first duration, and the second moment is determined based on the moment when the first communication device receives the first indication information.

[0363] In one embodiment, the first communications device activates one or more first carriers based on the first indication information, or determines that one or more first carriers are not dormant carriers, including at least one of the following:

[0364] The first communication device receives the sidelink information sent by the second communication device on the first carrier after the third moment;

[0365] The first communication device monitors the sideline control information sent by the second communication device on the first carrier after the third moment;

[0366] The first communication device does not expect to receive the sidelink information sent by the second communication device on the first carrier before the third time;

[0367] The first communication device does not expect to monitor the sideline control information sent by the second communication device on the first carrier before the third time;

[0368] The third moment is determined based on the fourth moment and the second duration, and the fourth moment is determined based on the moment when the first communication device receives the first indication information.

[0369] In one embodiment, the method for determining the first duration and / or the second duration includes at least one of the following: protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, indication information of the second communication device, and processing time of the terminal device.

[0370] In one embodiment, as shown in FIG19 , the device further includes:

[0371] The sending unit 1902 is configured to send second indication information to the second communication device, where the second indication information is used to request the second communication device to activate or deactivate one or more first carriers.

[0372] In one embodiment, the second indication information is used to indicate at least one of the following:

[0373] Instruction information for activating or deactivating the one or more first carriers;

[0374] Carrier information of the one or more first carriers.

[0375] In one implementation, the first communication device is a first terminal device, and the second communication device is a second terminal device.

[0376] In one embodiment, the first indication information is carried in sidelink control information SCI, sidelink reference signal, sidelink feedback control channel PSFCH, media access control MAC control element CE or direct communication radio resource control PC5-RRC signaling; wherein, the sidelink reference signal carrying the first indication information includes DMRS, CSI-RS or synchronization signal.

[0377] In one embodiment, when the first indication information is carried in the SCI or the MAC CE, the sending unit is further configured to:

[0378] Sidelink feedback information is sent to the second communication device, where the sidelink feedback information is used to indicate whether the first communication device has correctly received the first indication information and / or whether the one or more first carriers are activated or deactivated.

[0379] In one embodiment, the receiving unit is further configured to receive the first indication information sent by the second communication device on a second carrier, where the second carrier is different from the first carrier, or the second carrier is one of the one or more first carriers.

[0380] In one implementation, the second carrier includes at least one of the following:

[0381] A carrier used when the first communication device and the second communication device utilize one carrier for sidelink transmission;

[0382] PC5-carrier used for RRC signaling transmission;

[0383] The carrier where the DCR information is located.

[0384] In one implementation, the second carrier is determined in at least one of the following ways:

[0385] The carrier where the DCR information and / or DCA information is located during unicast link establishment;

[0386] The carrier where PC5-S is located;

[0387] Main carrier;

[0388] The third indication information sent by the first communication device or the second communication device is used to indicate the second carrier.

[0389] In one implementation, the primary carrier is determined in at least one of the following ways:

[0390] fourth indication information sent by the first communication device or the second communication device, where the fourth indication information is used to indicate the primary carrier;

[0391] The carrier where the direct communication request DCR information and / or direct communication acceptance DCA information are located during the unicast link establishment process;

[0392] PC5 signaling PC5-S carrier;

[0393] Preconfiguration information;

[0394] Network configuration information;

[0395] Carrier index information.

[0396] In one implementation, the second communication device is a network device, and the first communication device is a first terminal device.

[0397] In one implementation, the first indication information is carried in DCI, MAC CE or RRC signaling; the second indication information is carried in RRC signaling.

[0398] In one embodiment, the first carrier includes at least one of the following:

[0399] Carriers supported by sideline transmission;

[0400] a carrier corresponding to the first service type;

[0401] Carrier corresponding to the signaling type;

[0402] The first service type is a service type corresponding to the sideline transmission between the first communication device and the second communication device, and the signaling type includes PC5-RRC signaling, PC5-S signaling, DCR information or DCA information.

[0403] In one embodiment, the first indication information includes at least one of the following:

[0404] Indication bit, used to indicate activation or deactivation;

[0405] A bitmap used to indicate the carrier or carrier set that needs to be activated or deactivated;

[0406] One or more carrier indexes, used to indicate one or more carriers that need to be activated or deactivated.

[0407] In one implementation, the carrier or carrier set corresponding to each bit of the bitmap does not include the second carrier.

[0408] In one implementation, the correspondence between the bitmap and the carrier or carrier set is determined according to pre-configuration information, network configuration information, and indication information of the first communication device or the second communication device.

[0409] In one implementation, whether one or more carriers corresponding to the one or more carrier indexes are activated or deactivated is determined according to the value of the indicator bit.

[0410] In one embodiment, the transmission resource of the first indication information is determined based on at least one of protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, and indication information of the second communication device.

[0411] In one embodiment, the transmission resource of the first indication information is determined according to at least one of the following information:

[0412] identification information of the first communication device;

[0413] identification information of the second communication device;

[0414] Carrier identification information;

[0415] activation or deactivation information included in the first indication information;

[0416] The carrier identification information includes identification information of the first carrier and / or identification information corresponding to the carrier where the transmission resource of the first indication information is located.

[0417] In one embodiment, the first indication information is carried by a sequence; wherein the first indication information carried by the first sequence indicates activation of the first carrier; or, the first indication information carried by the second sequence indicates deactivation of the first carrier. The first communication devices 1800 and 1900 of the embodiment of the present application can implement the corresponding functions of the first communication device in the aforementioned method embodiment. The corresponding processes, functions, implementation methods and beneficial effects of each module (sub-module, unit or component, etc.) in the first communication devices 1800 and 1900 can be found in the corresponding description in the above-mentioned method embodiment, and will not be repeated here. It should be noted that the functions described in the various modules (sub-module, unit or component, etc.) in the first communication devices 1800 and 1900 of the application embodiment can be implemented by different modules (sub-module, unit or component, etc.) or by the same module (sub-module, unit or component, etc.).

[0418] FIG20 is a schematic block diagram of a second communication device 2000 according to an embodiment of the present application. The second communication device 2000 may include:

[0419] The sending unit 2001 is used to send first indication information to the first communication device, where the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

[0420] Figure 21 is a schematic block diagram of a second communication device 2100 according to another embodiment of the present application. The device may include one or more features of the above-mentioned device. In one embodiment, the second communication device further includes:

[0421] The receiving unit 2101 is configured to receive second indication information from the first communication device, where the second indication information is used to request the second communication device to activate or deactivate one or more first carriers.

[0422] In one embodiment, the second indication information is used to indicate at least one of the following:

[0423] Instruction information for activating or deactivating the one or more first carriers;

[0424] Carrier information of the one or more first carriers.

[0425] In one implementation, the first communication device is a first terminal device, and the second communication device is a second terminal device.

[0426] In one embodiment, the first indication information is carried in SCI, sidelink reference signal, sidelink feedback control channel PSFCH, MAC CE or PC5-RRC signaling; wherein, the sidelink reference signal carrying the first indication information includes DMRS, CSI-RS or synchronization signal.

[0427] In one embodiment, when the first indication information is carried in an SCI or a MAC CE, the device includes:

[0428] The receiving unit 2101 is further configured to receive side feedback information of the first communication device;

[0429] The processing unit 2102 is configured to determine, based on the sidelink feedback information, whether the first communication device has correctly received the first indication information, and / or whether the one or more first carriers are activated or deactivated.

[0430] In one implementation, the sending unit 2001 is further configured to send the first indication information to the first communication device on a second carrier, where the second carrier is different from the first carrier, or the second carrier is one of the one or more first carriers.

[0431] In one implementation, the second carrier includes at least one of the following:

[0432] A carrier used when the first communication device and the second communication device utilize one carrier for sidelink transmission;

[0433] PC5-carrier used for RRC signaling transmission;

[0434] The carrier where the DCR information is located.

[0435] In one implementation, the second carrier is determined in at least one of the following ways:

[0436] The carrier where the DCR information and / or DCA information is located during unicast link establishment;

[0437] The carrier where PC5-S is located;

[0438] Main carrier;

[0439] The third indication information sent by the first communication device and the second communication device is used to indicate the second carrier.

[0440] In one implementation, the primary carrier is determined in at least one of the following ways:

[0441] fourth indication information sent by the first terminal or the second terminal, where the fourth indication information is used to indicate the primary carrier;

[0442] The carrier where the DCR information and / or DCA information is located during unicast link establishment;

[0443] The carrier where PC5-S is located;

[0444] Preconfiguration information;

[0445] Network configuration information;

[0446] Carrier index information.

[0447] In one implementation, the second communication device is a network device, and the first communication device is a first terminal device.

[0448] In one implementation, the first indication information is carried in DCI, MAC CE or RRC signaling; the second indication information is carried in RRC signaling.

[0449] In one embodiment, the carriers allowed to be activated or deactivated include at least one of the following:

[0450] Carriers supported by sideline transmission;

[0451] a carrier corresponding to the first service type;

[0452] Carrier corresponding to the signaling type;

[0453] The first service type is a service type corresponding to the sideline transmission between the first communication device and the second communication device, and the signaling type includes PC5-RRC signaling, PC5-S signaling, DCR information or DCA information.

[0454] In one embodiment, the first indication information includes at least one of the following:

[0455] Indication bit, used to indicate activation or deactivation;

[0456] A bitmap used to indicate the carrier or carrier set that needs to be activated or deactivated;

[0457] One or more carrier indexes, used to indicate one or more carriers that need to be activated or deactivated.

[0458] In one implementation, the carrier or carrier set corresponding to each bit of the bitmap does not include the second carrier.

[0459] In one implementation, the correspondence between the bitmap and the carrier or carrier set is determined according to pre-configuration information, network configuration information, and indication information of the first terminal or the second communication device.

[0460] In one implementation, whether one or more carriers corresponding to the one or more carrier indexes are activated or deactivated is determined according to the value of the indicator bit.

[0461] In one embodiment, the transmission resource of the first indication information is determined based on at least one of protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, and indication information of the second communication device.

[0462] In one embodiment, the transmission resource of the first indication information is determined according to at least one of the following information:

[0463] identification information of the first communication device;

[0464] identification information of the second communication device;

[0465] Carrier identification information;

[0466] activation or deactivation information included in the first indication information;

[0467] The carrier identification information includes identification information of the first carrier and / or identification information corresponding to the carrier where the transmission resource of the first indication information is located.

[0468] In one embodiment, the first indication information is carried by a sequence; wherein the first indication information carried by the first sequence indicates activation of the first carrier; or the first indication information carried by the second sequence indicates deactivation of the first carrier.

[0469] The second communication devices 2000 and 2100 of the embodiments of the present application can implement the corresponding functions of the second communication devices in the aforementioned method embodiments. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the second communication devices 2000 and 2100 can be found in the corresponding descriptions in the aforementioned method embodiments and will not be repeated here. It should be noted that the functions described in the various modules (sub-modules, units or components, etc.) in the second communication devices 2000 and 2100 of the application embodiments can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0470] FIG22 is a schematic block diagram of a first communication device 2200 according to an embodiment of the present application. The first communication device 2200 may include:

[0471] The processing unit 2201 is configured to determine, based on a timer, whether the first carrier is an activated carrier or a dormant carrier.

[0472] In one embodiment, the processing unit 2201 is further configured to, before the first timer expires, fail to receive or successfully detect side information sent by the second communication device on the first carrier, and the first communication device determines that the first carrier is a dormant carrier, or deactivates the first carrier.

[0473] In one embodiment, the device further includes: a processing unit 2201, further configured to start or restart the second timer. For example, after determining that the first carrier is a dormant carrier or deactivating the first carrier, start or restart the second timer.

[0474] In one implementation, the processing unit 2201 is further configured to, when the second timer expires, determine that the first carrier is in an activated state, or activate the first carrier, or cause the first carrier to exit a dormant state.

[0475] Figure 23 is a schematic block diagram of a first communication device 2300 according to another embodiment of the present application. The device may include one or more features of the above-mentioned device. In one embodiment, the processing unit 2201 is further configured to determine whether the first carrier is an activated carrier or a dormant carrier based on a timer and a counter.

[0476] In one embodiment, the processing unit 2201 is further configured to increase the value of the first counter if the sidelink information sent by the second communication device is not received or is not successfully detected on the first carrier before the first timer expires.

[0477] In one embodiment, the processing unit 2201 is further configured to start or restart the first timer, for example, after increasing the value of the first counter, start or restart the first timer.

[0478] In one embodiment, the processing unit 2201 is further configured to, before the first timer expires, receive or successfully detect sidelink information sent by the second communication device on the first carrier, and reset the value of the first counter.

[0479] In one implementation, the processing unit 2201 is further configured to, when the value of the first counter is greater than or equal to a first threshold, determine that the first carrier is a dormant carrier, or deactivate the first carrier.

[0480] In one implementation, the first threshold is determined according to protocol predefined information, preconfigured information, network configuration information, indication information of the first communication device, or indication information of the second communication device.

[0481] In one embodiment, the processing unit 2201 is further configured to start or restart a second timer. For example, after determining that the first carrier is a dormant carrier or deactivating the first carrier, start or restart the second timer.

[0482] In one implementation, the processing unit 2201 is further configured to, when the second timer expires, determine that the first carrier is in an activated state, or activate the first carrier, or cause the first carrier to exit a dormant state.

[0483] In one embodiment, the processing unit 2201 is further configured to start or restart the first timer after determining that the first carrier is in an activated state, activating the first carrier, or exiting a dormant state.

[0484] In one embodiment, the second communication device further includes:

[0485] The receiving unit 2301 is configured to receive first indication information sent by a second communication device, where the first indication information is used to indicate that the first carrier is in an activated state, or to activate the first carrier, or to exit a dormant state.

[0486] In one implementation, the processing unit 2201 is further configured to start or restart the first timer.

[0487] In one implementation, the first indication information is transmitted on the second carrier.

[0488] In one embodiment, the first indication information is carried by at least one of the following: sidelink control information SCI, a sidelink reference signal, and PSFCH; wherein the sidelink reference signal carrying the first indication information includes DMRS, CSI-RS, or a synchronization signal.

[0489] In one embodiment, the transmission resource of the first indication information is determined based on at least one of protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, and indication information of the second communication device.

[0490] In one embodiment, the transmission resource of the first indication information is determined according to at least one of the following information:

[0491] identification information of the first communication device;

[0492] identification information of the second communication device;

[0493] Carrier identification information;

[0494] activation or deactivation information included in the first indication information;

[0495] The carrier identification information includes identification information of the first carrier and / or identification information corresponding to the carrier where the transmission resource of the first indication information is located.

[0496] In one embodiment, the first indication information is carried by a sequence; wherein the first indication information carried by the first sequence indicates activation of the first carrier; or the first indication information carried by the second sequence indicates deactivation of the first carrier.

[0497] The first communication devices 2200 and 2300 of the embodiments of the present application can implement the corresponding functions of the first communication devices in the aforementioned method embodiments. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the first communication devices 2200 and 2300 can be found in the corresponding descriptions in the above-mentioned method embodiments and will not be repeated here. It should be noted that the functions described in the various modules (sub-modules, units or components, etc.) in the first communication devices 2200 and 2300 of the application embodiments can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0498] Figure 24 is a schematic structural diagram of a communication device 2400 according to an embodiment of the present application. The communication device 2400 includes a processor 2410, which can call and run a computer program from a memory to enable the communication device 2400 to implement the method in the embodiment of the present application.

[0499] In one embodiment, the communication device 2400 may further include a memory 2420. The processor 2410 may call and execute a computer program from the memory 2420 to enable the communication device 2400 to implement the method in the embodiment of the present application.

[0500] The memory 2420 may be a separate device independent of the processor 2410 , or may be integrated into the processor 2410 .

[0501] In one embodiment, the communication device 2400 may further include a transceiver 2430 , and the processor 2410 may control the transceiver 2430 to communicate with other devices. Specifically, the transceiver 2430 may send information or data to other devices, or receive information or data sent by other devices.

[0502] The transceiver 2430 may include a transmitter and a receiver. The transceiver 2430 may further include an antenna, and the number of antennas may be one or more.

[0503] In one embodiment, the communication device 2400 may be the first communication device of the embodiment of the present application, and the communication device 2400 may implement the corresponding processes implemented by the first communication device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0504] In one embodiment, the communication device 2400 may be the second communication device of the embodiment of the present application, and the communication device 2400 may implement the corresponding processes implemented by the second communication device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0505] 25 is a schematic structural diagram of a chip 2500 according to an embodiment of the present application. The chip 2500 includes a processor 2510, which can call and execute a computer program from a memory to implement the method according to the embodiment of the present application.

[0506] In one embodiment, the chip 2500 may further include a memory 2520. The processor 2510 may call and execute a computer program from the memory 2520 to implement the method executed by the first communication device or the second communication device in the embodiment of the present application.

[0507] The memory 2520 may be a separate device independent of the processor 2510 or may be integrated into the processor 2510 .

[0508] In one embodiment, the chip 2500 may further include an input interface 2530. The processor 2510 may control the input interface 2530 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0509] In one embodiment, the chip 2500 may further include an output interface 2540. The processor 2510 may control the output interface 2540 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0510] In one embodiment, the chip can be applied to the first communication device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first communication device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0511] In one embodiment, the chip can be applied to the second communication device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the second communication device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0512] The chips used in the first communication device and the second communication device may be the same chip or different chips.

[0513] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0514] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0515] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM).

[0516] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0517] FIG26 is a schematic block diagram of a communication system 2600 according to an embodiment of the present application. The communication system 2600 includes a first communication device 2610 and a second communication device 2620 .

[0518] In one embodiment, the first communication device 2610 is used to receive first indication information sent by the second communication device, where the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

[0519] In one implementation, the second communication device 2620 is configured to send first indication information to the first communication device.

[0520] In one embodiment, the first communications device determines whether the first carrier is an activated carrier or a dormant carrier based on a timer.

[0521] The first communication device 2610 can be used to implement the corresponding functions implemented by the first communication device in the above method, and the second communication device 2620 can be used to implement the corresponding functions implemented by the second communication device in the above method. For the sake of brevity, they are not described here in detail.

[0522] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function in accordance with the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0523] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0524] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0525] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A sideline communication method, comprising: A first communication device receives first indication information sent by a second communication device, wherein the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

2. The method according to claim 1, wherein: The method further comprises: The first communication device activates or deactivates one or more first carriers based on the first indication information, or determines that one or more first carriers are activated or deactivated, or determines whether one or more first carriers are dormant carriers.

3. The method according to claim 2, wherein: The first communications device deactivates one or more first carriers based on the first indication information, or determines that one or more first carriers are deactivated, or determines that one or more first carriers are dormant carriers, including at least one of the following: The first communication device does not expect to receive the sideline information sent by the second communication device on the first carrier after the first moment; The first communication device does not expect to monitor the side control information sent by the second communication device on the first carrier after the first moment; The first moment is determined based on the second moment and the first duration, and the second moment is determined based on the moment when the first communication device receives the first indication information.

4. The method according to claim 2, wherein: The first communications device activates one or more first carriers based on the first indication information, or determines that one or more first carriers are activated, or determines that one or more first carriers are not dormant carriers, including at least one of the following: The first communication device receives the sideline information sent by the second communication device on the first carrier after the third moment; The first communication device monitors the side control information sent by the second communication device on the first carrier after the third moment; The first communication device does not expect to receive the sideline information sent by the second communication device on the first carrier before the third time; The first communication device does not expect to monitor the side control information sent by the second communication device on the first carrier before the third time; The third moment is determined based on a fourth moment and a second duration, and the fourth moment is determined based on a moment when the first communication device receives the first indication information.

5. The method according to claim 3 or 4, wherein: The method for determining the first duration and / or the second duration includes at least one of the following: protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, indication information of the second communication device, and processing time of the terminal device.

6. The method according to any one of claims 1 to 5, wherein: The method further comprises: The first communication device sends second indication information to the second communication device, where the second indication information is used to request the second communication device to activate or deactivate one or more first carriers.

7. The method according to claim 6, wherein: The second indication information is used to indicate at least one of the following: indication information for activating or deactivating the one or more first carriers; Carrier information of the one or more first carriers.

8. The method according to any one of claims 1 to 7, wherein: The first communication device is a first terminal device, and the second communication device is a second terminal device.

9. The method according to claim 8, wherein: The first indication information is carried in the sidelink control information SCI, the sidelink reference signal, the sidelink feedback control channel PSFCH, the media access control MAC control element CE or the direct communication radio resource control PC5-RRC signaling; wherein, the sidelink reference signal carrying the first indication information includes DMRS, CSI-RS or a synchronization signal.

10. The method according to claim 9, wherein: In the case where the first indication information is carried in the SCI or the MAC CE, the method further includes: The first communication device sends side feedback information to the second communication device, where the side feedback information is used to indicate whether the first communication device correctly receives the first indication information and / or whether the one or more first carriers are activated or deactivated.

11. The method according to any one of claims 1 to 10, wherein: The first communication device receiving the first indication information sent by the second communication device includes: The first communication device receives the first indication information sent by the second communication device on a second carrier, where the second carrier is different from the first carrier, or the second carrier is one of the one or more first carriers.

12. The method according to claim 11, wherein: The second carrier includes at least one of the following: The carrier used when the first communication device and the second communication device use one carrier for sidelink transmission; PC5-Carrier used for RRC signaling transmission; The carrier where the DCR information is located.

13. The method according to claim 11 or 12, wherein: The second carrier is determined in at least one of the following ways: The carrier where the DCR information and / or DCA information is located during the unicast link establishment process; The carrier where PC5-S is located; Main carrier; The third indication information sent by the first communication device or the second communication device, wherein the third indication information is used to indicate the second carrier.

14. The method according to claim 13, wherein: The primary carrier is determined in at least one of the following ways: fourth indication information sent by the first communication device or the second communication device, where the fourth indication information is used to indicate the primary carrier; The carrier where the direct communication request DCR information and / or the direct communication acceptance DCA information are located during the unicast link establishment process; The carrier where PC5 signaling PC5-S is located; Pre-configuration information; Network configuration information; Carrier index information.

15. The method according to any one of claims 1, 2, 6 or 7, wherein: The second communication device is a network device, and the first communication device is a first terminal device.

16. The method according to claim 15, wherein: The first indication information is carried in DCI, MAC CE or RRC signaling; the second indication information is carried in RRC signaling.

17. The method according to any one of claims 1 to 16, wherein: The first carrier includes at least one of the following: Carriers supported by sideline transmission; A carrier corresponding to the first service type; The carrier corresponding to the signaling type; Among them, the first service type is the service type corresponding to the side transmission between the first communication device and the second communication device, and the signaling type includes PC5-RRC signaling, PC5-S signaling, DCR information or DCA information.

18. The method according to any one of claims 1 to 17, wherein: The first indication information includes at least one of the following: An indication bit, used to indicate activation or deactivation; A bitmap is used to indicate the carrier or carrier set that needs to be activated or deactivated; One or more carrier indexes are used to indicate one or more carriers that need to be activated or deactivated.

19. The method according to claim 18, wherein: The carrier or carrier set corresponding to each bit of the bit map does not include the second carrier.

20. The method according to claim 18 or 19, wherein: The correspondence between the bitmap and the carrier or carrier set is determined according to pre-configuration information, network configuration information, and indication information of the first communication device or the second communication device.

21. The method according to any one of claims 18 to 20, wherein: Whether one or more carriers corresponding to the one or more carrier indexes are activated or deactivated is determined according to the value of the indicator bit.

22. The method according to any one of claims 1 to 21, wherein: The transmission resource of the first indication information is determined based on at least one of protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, and indication information of the second communication device.

23. The method according to any one of claims 1 to 22, wherein: The transmission resource of the first indication information is determined according to at least one of the following information: identification information of the first communication device; identification information of the second communication device; Carrier identification information; The first indication information includes activation or deactivation information; The carrier identification information includes identification information of the first carrier and / or identification information corresponding to the carrier where the transmission resource of the first indication information is located.

24. The method according to any one of claims 1 to 23, wherein: The first indication information is carried by a sequence; wherein the first indication information carried by the first sequence indicates activation of the first carrier; or the first indication information carried by the second sequence indicates deactivation of the first carrier.

25. A sideline communication method, comprising: The second communication device sends first indication information to the first communication device, wherein the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

26. The method according to claim 25, wherein: The method further comprises: The second communication device receives second indication information from the first communication device, where the second indication information is used to request the second communication device to activate or deactivate one or more first carriers.

27. The method according to claim 26, wherein: The second indication information is used to indicate at least one of the following: indication information for activating or deactivating the one or more first carriers; Carrier information of the one or more first carriers.

28. A method according to any one of claims 25 to 27, wherein: The first communication device is a first terminal device, and the second communication device is a second terminal device.

29. The method according to claim 28, wherein: The first indication information is carried in SCI, sidelink reference signal, sidelink feedback control channel PSFCH, MAC CE or PC5-RRC signaling; wherein, the sidelink reference signal carrying the first indication information includes DMRS, CSI-RS or synchronization signal.

30. The method of claim 29, wherein: In the case where the first indication information is carried in the SCI or the MAC CE, the method further includes: The second communication device receives the side feedback information of the first communication device; The second communication device determines, according to the sidelink feedback information, whether the first communication device has correctly received the first indication information, and / or whether the one or more first carriers are activated or deactivated.

31. The method according to any one of claims 25 to 30, wherein: The second communication device sending the first indication information to the first communication device includes: The second communication device sends the first indication information to the first communication device on a second carrier, where the second carrier is different from the first carrier, or the second carrier is one of the one or more first carriers.

32. The method according to claim 31, wherein: The second carrier includes at least one of the following: The carrier used when the first communication device and the second communication device use one carrier for sidelink transmission; PC5-Carrier used for RRC signaling transmission; The carrier where the DCR information is located.

33. The method according to claim 31 or 32, wherein: The second carrier is determined in at least one of the following ways: The carrier where the DCR information and / or DCA information is located during the unicast link establishment process; The carrier where PC5-S is located; Main carrier; The third indication information sent by the first communication device and the second communication device, wherein the third indication information is used to indicate the second carrier.

34. The method of claim 33, wherein: The primary carrier is determined in at least one of the following ways: fourth indication information sent by the first terminal or the second terminal, where the fourth indication information is used to indicate the primary carrier; The carrier where the DCR information and / or DCA information is located during the unicast link establishment process; The carrier where PC5-S is located; Pre-configuration information; Network configuration information; Carrier index information.

35. The method according to any one of claims 25 to 27, wherein: The second communication device is a network device, and the first communication device is a first terminal device.

36. The method of claim 35, wherein: The first indication information is carried in DCI, MAC CE or RRC signaling; the second indication information is carried in RRC signaling.

37. The method according to any one of claims 25 to 36, wherein: The carriers that are allowed to be activated or deactivated include at least one of the following: Carriers supported by sideline transmission; A carrier corresponding to the first service type; The carrier corresponding to the signaling type; Among them, the first service type is the service type corresponding to the side transmission between the first communication device and the second communication device, and the signaling type includes PC5-RRC signaling, PC5-S signaling, DCR information or DCA information.

38. The method according to any one of claims 25 to 37, wherein: The first indication information includes at least one of the following: An indication bit, used to indicate activation or deactivation; A bitmap is used to indicate the carrier or carrier set that needs to be activated or deactivated; One or more carrier indexes are used to indicate one or more carriers that need to be activated or deactivated.

39. The method of claim 38, wherein: The carrier or carrier set corresponding to each bit of the bit map does not include the second carrier.

40. The method according to claim 38 or 39, wherein: The correspondence between the bitmap and the carrier or carrier set is determined according to pre-configuration information, network configuration information, and indication information of the first terminal or the second communication device.

41. The method according to any one of claims 38 to 40, wherein: Whether one or more carriers corresponding to the one or more carrier indexes are activated or deactivated is determined according to the value of the indicator bit.

42. The method according to any one of claims 25 to 41, wherein: The transmission resource of the first indication information is determined based on at least one of protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, and indication information of the second communication device.

43. A method according to any one of claims 25 to 42, wherein: The transmission resource of the first indication information is determined according to at least one of the following information: identification information of the first communication device; identification information of the second communication device; Carrier identification information; The first indication information includes activation or deactivation information; The carrier identification information includes identification information of the first carrier and / or identification information corresponding to the carrier where the transmission resource of the first indication information is located.

44. A method according to any one of claims 25 to 43, wherein: The first indication information is carried by a sequence; wherein the first indication information carried by the first sequence indicates activation of the first carrier; or the first indication information carried by the second sequence indicates deactivation of the first carrier.

45. A sideline communication method, comprising: The first communications device determines whether the first carrier is an activated carrier or a dormant carrier based on a timer.

46. ​​The method of claim 45, wherein: The first communication device determines, based on a timer, that the first carrier is an activated carrier or a dormant carrier, including: Before the first timer expires, the first communication device does not receive or successfully detect the sideline information sent by the second communication device on the first carrier, and the first communication device determines that the first carrier is a dormant carrier, or deactivates the first carrier.

47. The method of claim 45, wherein: The first communication device determines, based on a timer, that the first carrier is an activated carrier or a dormant carrier, including: The first communications device determines whether the first carrier is an activated carrier or a dormant carrier based on a timer and a counter.

48. The method of claim 47, wherein: The method further comprises: Before the first timer expires, the first communication device does not receive or successfully detect the sidelink information sent by the second communication device on the first carrier, and increases the value of the first counter.

49. The method of claim 48, wherein: The method further includes: starting or restarting the first timer.

50. The method of claim 48 or 49, wherein: The first communication device determines, based on a timer and a counter, whether the first carrier is an activated carrier or a dormant carrier, further comprising: When the value of the first counter is greater than or equal to a first threshold value, the first communications device determines that the first carrier is a dormant carrier, or deactivates the first carrier.

51. The method of claim 50, wherein: The first threshold is determined according to protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device or indication information of the second communication device.

52. The method of claim 46, 50 or 51, wherein: The method further comprises: Start or restart the second timer.

53. The method of claim 52, wherein: The first communication device determines whether the first carrier is an activated carrier or a dormant carrier based on the timer, further comprising: When the second timer expires, the first communications device determines that the first carrier is in an activated state, or activates the first carrier, or the first carrier exits a dormant state.

54. The method of claim 53, wherein: The method further comprises: Start or restart the first timer.

55. The method of claim 52, wherein: The method further comprises: The first communication device receives first indication information sent by the second communication device, where the first indication information is used to indicate that the first carrier is in an activated state, or activates the first carrier, or the first carrier exits a dormant state.

56. The method of claim 52, wherein: The method further includes: starting or restarting the first timer.

57. The method of claim 55 or 56, wherein: The first indication information is transmitted on a second carrier.

58. A method according to any one of claims 55 to 57, wherein: The first indication information is carried by at least one of the following: sidelink control information SCI, a sidelink reference signal, and PSFCH; wherein the sidelink reference signal carrying the first indication information includes DMRS, CSI-RS, or a synchronization signal.

59. The method according to any one of claims 55 to 58, wherein: The transmission resource of the first indication information is determined based on at least one of protocol predefined information, preconfiguration information, network configuration information, indication information of the first communication device, and indication information of the second communication device.

60. The method according to any one of claims 55 to 59, wherein: The transmission resource of the first indication information is determined according to at least one of the following information: identification information of the first communication device; identification information of the second communication device; Carrier identification information; The first indication information includes activation or deactivation information; The carrier identification information includes identification information of the first carrier and / or identification information corresponding to the carrier where the transmission resource of the first indication information is located.

61. The method according to any one of claims 55 to 60, wherein: The first indication information is carried by a sequence; wherein the first indication information carried by the first sequence indicates activation of the first carrier; or the first indication information carried by the second sequence indicates deactivation of the first carrier.

62. The method according to any one of claims 46, 48 to 61, wherein: The method further comprises: Before the first timer expires, the first communication device receives or successfully detects sidelink information sent by the second communication device on the first carrier, and resets the value of the first counter.

63. A first communication device, comprising: A receiving unit, used to receive first indication information sent by a second communication device, wherein the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

64. A second communication device, comprising: A sending unit, used to send first indication information to a first communication device, wherein the first indication information is used to activate or deactivate one or more first carriers, or the first indication information is used to indicate that one or more first carriers are dormant carriers or activated carriers, or the first indication information is used to indicate that one or more first carriers are activated or deactivated; wherein the first carrier is a carrier used for side transmission.

65. A first communication device, comprising: The processing unit is configured to determine, based on the timer, whether the first carrier is an activated carrier or a dormant carrier.

66. A communication device comprising: A transceiver, a processor and a memory, wherein the memory is used to store a computer program, the transceiver is used to communicate with other devices, and the processor is used to call and run the computer program stored in the memory so that the communication device performs the method as described in any one of claims 1 to 24, any one of claims 25 to 44, or any one of claims 45 to 62.

67. A chip, comprising: A processor, configured to call and run a computer program from a memory so that a device equipped with the chip executes a method as described in any one of claims 1 to 24, any one of 25 to 44, or any one of 45 to 62.

68. A computer-readable storage medium for storing a computer program, which, when executed by a device, causes the device to perform the method of any one of claims 1 to 24, any one of 25 to 44, or any one of 45 to 62.

69. A computer program product comprising computer program instructions which cause a computer to perform the method of any one of claims 1 to 24, any one of 25 to 44 or any one of 45 to 62.

70. A computer program causing a computer to perform the method of any one of claims 1 to 24, any one of 25 to 44 or any one of 45 to 62.

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