Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The communication method comprises: a terminal device receiving a low power wake up signal (LP-WUS); and on the basis of the LP-WUS, the terminal device switching to a main link of the terminal device and setting the state of a first resource. The method can reduce the time delay of setting the state of a first resource after a terminal device switches to a main link in the scenario where the terminal device operates in an auxiliary link.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 27, 2023, with application number 202311835267.8 and application name “Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and in particular to a communication method and a communication device. Background Art

[0003] Currently, in a scenario where the receiver of a terminal device operates in an auxiliary link, if the base station wants the terminal device to activate the deactivated resources, the base station needs to first send a low power wake up signal (LP-WUS) to the terminal device to wake up the main link that is closed in the terminal device, and then send downlink control information (DCI) to the terminal device to instruct the deactivated resources to be switched to the activated state. Accordingly, when the terminal device detects the DCI, the terminal device sets the deactivated resources to the activated state.

[0004] However, there is a problem of long delay in switching the state of the first resource after the terminal device switches to the main link, which further leads to relatively long service delay. Summary of the Invention

[0005] The present application provides a communication method to reduce the delay in setting the state of a first resource after a terminal device switches to a main link in a scenario where the terminal device operates in an auxiliary link.

[0006] On the first aspect, the present application provides a communication method, which can be executed by a terminal device, or by a component configured in the terminal device (such as a chip, a chip system, etc.), or it can also be a logic module or software that can realize all or part of the terminal functions. The present application does not limit this.

[0007] Exemplarily, the method includes: receiving an LP-WUS; and according to the LP-WUS, switching to a primary link of the terminal device and setting a state of a first resource.

[0008] In this technical solution, after receiving the LP-WUS for waking up the main link, the terminal device will not only switch to the main link operation, but also set the state of the first resource. That is to say, in this embodiment, after the access network device sends the LP-WUS to the terminal device, there is no need to send the DCI specifically used to instruct the terminal device to set the state of the first resource to the terminal device. Accordingly, after the terminal device wakes up the main link (that is, after switching to the main link operation), it directly sets the state of the first resource based on the LP-WUS, and no longer needs to set the state of the first resource based on the detection of the DCI sent by the access network device. Therefore, when the terminal device is working in the auxiliary link scenario, the delay in setting the state of the first resource after switching to the main link can be reduced.

[0009] In combination with the first aspect, in one implementation, the state of the first resource is in a deactivated state while the terminal device is operating in an auxiliary link; according to the LP-WUS, switching to the main link of the terminal device and setting the state of the first resource includes: if the LP-WUS is received, switching to the main link of the terminal device and setting the state of the first resource to an activated state.

[0010] In this technical solution, after receiving the LP-WUS for waking up the main link, the terminal device will not only switch to the main link operation, but also activate the first resource in the deactivated state, so that the state of the first resource becomes the activated state, that is, it can be considered that the state of the first resource is switched. It can be understood that under this technical solution, since the terminal device no longer needs to continue to detect the DCI sent by the access network device for activating the first resource after the main link is awakened, the delay of the terminal device in activating the first resource can be reduced. In addition, it can be understood that for the access network device, this method also reduces the signaling overhead of the access network device indicating the activation of the first resource through DCI.

[0011] In conjunction with the first aspect, in one implementation, the LP-WUS carries first information, where the first information is used to indicate a state of the first resource;

[0012] According to the LP-WUS, switching to the main link of the terminal device and setting the state of the first resource includes: when receiving the LP-WUS, switching to the main link of the terminal device and setting the state of the first resource according to the first information.

[0013] In this technical solution, the LP-WUS sent by the access network device to the terminal device, in addition to indicating whether to wake up the main link of the terminal device, also indicates the status of the first resource after the terminal device switches to the main link. That is, the access network device simultaneously indicates the status of switching to the main link and the first resource to the terminal device through an LP-WUS, so that the terminal device no longer needs to detect the DCI used to indicate the status of switching the first resource after switching to the main link, thereby improving the delay in setting the status of the first resource after the terminal device switches to the main link.

[0014] In combination with the first aspect, in one implementation, the first resource is a resource in a first resource group, the first information is used to indicate a state of at least one resource in the first resource group, and the at least one resource includes the first resource.

[0015] In combination with the first aspect, in one implementation, the state of the first resource is in a deactivated state during the period when the terminal device operates in the auxiliary link; the first information is used to indicate the state of the first resource, including: the first information is used to indicate whether the first resource is activated; according to LP-WUS, switching to the main link of the terminal device and setting the state of the first resource, including: if the first information indicates to activate the first resource, when LP-WUS is received, switching to the main link of the terminal device and activating the first resource.

[0016] In this implementation, LP-WUS is used to indicate whether to wake up the main link of the terminal device and whether to activate the first resource.

[0017] In combination with the first aspect, in a possible implementation, the first resource is a first part of the bandwidth BWP included in the first secondary cell Scell, and the first Scell ​​also includes a dormant BWP; wherein, when the terminal device operates in the secondary link, the dormant BWP is in an activated state and the first BWP is in a deactivated state.

[0018] The first BWP is one of the other BWPs except the sleep BWP in the at least one BWP included in the first Scell, that is, the first BWP is a normal BWP or a non-sleep BWP included in the first Scell.

[0019] In this technical solution, after receiving the LP-WUS for waking up the primary link, the terminal device not only switches to the primary link, but also activates the first BWP on the first Scell, which was in a deactivated state, so that the first BWP on the first Scell ​​becomes activated. Understandably, in this technical solution, since the terminal device no longer needs to detect the DCI sent by the access network device for activating the first BWP on the first Scell ​​after the primary link is awakened, the latency of the terminal device activating the first BWP on the first Scell ​​can be reduced.

[0020] In combination with the first aspect, in a possible implementation, the method further includes: when the terminal device is operating in the main link, receiving second information, the second information being used to instruct the terminal device to sleep on the first Scell; in response to the second information, sleeping on the first Scell; wherein, when sleeping on the first Scell, the sleep BWP is in an activated state and the first BWP is in a deactivated state.

[0021] In combination with the first aspect, in a possible implementation, the method further includes: when the terminal device is operating in the main link, receiving third information, the third information is used to indicate a first CSI measurement period when the terminal device performs channel state information (CSI) measurement; performing CSI measurement based on a second CSI measurement period, the second CSI measurement period being greater than the first CSI measurement period.

[0022] Optionally, in a possible implementation, the access network device sends fourth information to the terminal device, where the fourth information is used to indicate the second CSI measurement period; accordingly, the terminal device obtains the second CSI measurement period through the fourth information.

[0023] In this technical solution, the terminal device can relax the measurement of CSI during the period when it operates in the auxiliary link, thereby further reducing the power consumption of the terminal device during the period when it operates in the auxiliary link.

[0024] With reference to the first aspect, in a possible implementation, the first resource is a first semi-persistent scheduling (SPS) resource.

[0025] In this technical solution, after receiving the LP-WUS for waking up the main link, the terminal device not only switches to the main link, but also activates the deactivated first SPS, so that the state of the first SPS resource on the first Scell ​​becomes activated. It can be understood that under this technical solution, since the terminal device no longer needs to continue to detect the DCI sent by the access network device for activating the first SPS resource after the main link is awakened, the delay of the terminal device in activating the first SPS resource can be reduced.

[0026] In combination with the first aspect, in a possible implementation, when the first resource is a first SPS resource, the method further includes: when the terminal device is operating in the main link, receiving fifth information, the fifth information is used to instruct the terminal device to deactivate the first SPS resource; in response to the fifth information, setting the state of the first SPS resource to a deactivated state.

[0027] In combination with the first aspect, in one possible implementation, the first information is used to indicate the status of the first resource, including: the first information is used to indicate whether to deactivate the first resource; according to the LP-WUS, switching to the main link of the terminal device and setting the status of the first resource, including: if the first information indicates to deactivate the first resource, when the LP-WUS is received, switching to the main link of the terminal device and not performing signal detection on the first resource.

[0028] Optionally, under this technical solution, the first resource may be, for example, a WUS resource (also called a DCP resource).

[0029] The communication method provided in this embodiment adds indication information to the LP-WUS to instruct the terminal device whether to deactivate the first resource after switching to the primary link. As can be seen, in the scenario where the state of the first resource changes from a deactivated state to an activated state, this technical solution does not require the access network device to send a DCI to the terminal device after the terminal device wakes up the primary link to instruct it to deactivate the first resource. Accordingly, the terminal device does not need to continue detecting the DCI indicating the deactivation of the first resource, thereby reducing the power consumption of the terminal device.

[0030] In combination with the first aspect, in a possible implementation, the above method also includes: when the first information indicates that the first resource is not deactivated and the terminal device has not detected a signal on the first resource within a first time period, switching from the main link of the terminal device to the auxiliary link of the terminal device.

[0031] On the second aspect, the present application provides a communication method, which can be executed by an access network device, or by a component configured in the access network device (such as a chip, a chip system, etc.), or it can also be a logical module or software that can realize all or part of the functions of the access network device. The present application does not limit this.

[0032] Exemplarily, the method includes: sending a low power consumption wake-up signal LP-WUS, where the LP-WUS carries first information, and the first information is used to indicate a state of a first resource.

[0033] In combination with the second aspect, in a possible implementation, the first resource is a resource in a first resource group, the first information is used to indicate a state of at least one resource in the first resource group, and the at least one resource includes the first resource.

[0034] In combination with the second aspect, in a possible implementation, the state of the first resource is in a deactivated state when the terminal device operates in the auxiliary link; the first information is used to indicate the state of the first resource, including: the first information is used to indicate whether the first resource is activated.

[0035] With reference to the second aspect, in a possible implementation, the first resource is a first portion of a bandwidth BWP included in a first secondary cell Scell, and the first Scell ​​further includes a dormant BWP;

[0036] Wherein, while the terminal device is operating in the auxiliary link, the dormant BWP is in an activated state and the first BWP is in a deactivated state.

[0037] In conjunction with the second aspect, in a possible implementation, the method further includes: when the terminal device operates in the primary link, sending second information, where the second information is used to instruct the terminal device to sleep on the first Scell.

[0038] In combination with the second aspect, in a possible implementation, the method further includes: when the terminal device operates in the main link, sending third information and fourth information, the third information is used to indicate the first CSI measurement period when the terminal device performs CSI measurement, and the fourth information is used to indicate the second CSI measurement period when the terminal device performs CSI measurement.

[0039] In combination with the second aspect, in a possible implementation, the first resource is a first SPS resource.

[0040] In combination with the second aspect, in a possible implementation, the method further includes: when the terminal device operates in the primary link, sending fifth information, where the fifth information is used to instruct the terminal device to deactivate the first SPS resource.

[0041] In combination with the second aspect, in a possible implementation manner, the first information is used to indicate the state of the first resource, including: the first information is used to indicate whether to deactivate the first resource.

[0042] With reference to the second aspect, in a possible implementation, the signal on the first resource is a wake-up signal WUS.

[0043] In combination with the second aspect, in a possible implementation, the method further includes: if the first information indicates that there is no need to deactivate the first resource and the terminal device does not detect a signal on the first resource within a first time period, switching from the main link of the terminal device to the auxiliary link of the terminal device.

[0044] In a third aspect, the present application provides a communication method, applied to a terminal device, comprising: when the terminal device operates in a main link, receiving sixth information, the sixth information indicating deactivation of M SPS resources among N activated SPS resources, M and N are positive integers, and M is less than N; switching to an auxiliary link to operate; when at the target SPS resource, switching to the main link and detecting the signal on the target SPS resource, the target SPS resource being included in the NM SPS resources among the N SPS resources excluding the M SPS resources.

[0045] In combination with the third aspect, in a possible implementation manner, the SPS period corresponding to the M SPS resources is smaller than the SPS period corresponding to any SPS resource among the N SPS resources except the M SPS resources.

[0046] In a fourth aspect, the present application provides a communication method applied to an access network device, including: sending sixth information, the sixth information instructing the terminal device to deactivate M SPS resources among N activated SPS resources, where M and N are positive integers and M is less than N.

[0047] In a fifth aspect, the present application provides a communication method, applied to a terminal device, including: when the terminal device operates in a main link, receiving seventh information, the seventh information indicating K activated SPS resources; switching to an auxiliary link operation, and deactivating P SPS resources among the K SPS resources, the SPS periods corresponding to the P SPS resources being smaller than the SPS periods corresponding to any one of the K SPS resources except the P SPS resources.

[0048] In a sixth aspect, the present application provides a communications device that can implement the methods described in aspects 1 to 5 and any possible implementation of aspects 1 to 5. The device includes corresponding modules for executing the aforementioned methods. The modules included in the device can be implemented in software and / or hardware.

[0049] In a seventh aspect, the present application provides a communication device comprising a processor, which can be used to execute a computer program in a memory to implement the method described in the first to fifth aspects and any possible implementation method of the first to fifth aspects.

[0050] Optionally, the device further includes a communication interface, and the processor is coupled to the communication interface. The communication interface is configured to receive signals from other communication devices outside the device and transmit them to the processor, or to transmit signals from the processor to other communication devices outside the device. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.

[0051] Optionally, the apparatus further comprises a memory, the processor being coupled to the memory. The memory is configured to store program instructions and data. The memory is coupled to the processor, and when the processor executes instructions stored in the memory, the methods described in the above aspects can be implemented.

[0052] In an eighth aspect, the present application provides a communication device comprising a processor and a communication interface, wherein the communication interface is configured to receive signals from other communication devices outside the communication device and transmit them to the processor, or to send signals from the processor to other communication devices outside the communication device, wherein the processor implements the method described in any possible implementation of aspects 1 to 5 and aspects 1 to 5 through a logic circuit or by executing code instructions. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.

[0053] Optionally, the device further includes a memory for storing instructions and data. The memory may be coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in any possible implementation of the first to fifth aspects and the first to fifty-fourth aspects is implemented.

[0054] In the ninth aspect, the present application provides a communication device comprising a processor and a memory, wherein the memory is used to store instructions and data. When the processor executes the instructions stored in the memory, it can implement the methods described in the first to fifth aspects and any possible implementation methods of the first to fifth aspects.

[0055] Optionally, the device further includes a communication interface, which is used for the device to communicate with other communication devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin or other types of communication interfaces.

[0056] In the tenth aspect, the present application provides a computer-readable storage medium, which stores a computer program or instructions. When the computer program or instructions are executed, the method described in the first to fifth aspects and any possible implementation method of the first to fifth aspects is implemented.

[0057] In a tenth aspect, the present application provides a computer program product comprising instructions, which, when executed, implement the method described in the first to fifth aspects and any possible implementation of the first to fifth aspects.

[0058] In the eleventh aspect, the present application provides a chip system comprising at least one processor for supporting the functions involved in implementing the first to fifth aspects and any possible implementation of the first to fifth aspects, such as receiving or processing the data involved in the above method.

[0059] In one possible design, the chip system further includes a memory, which is used to store program instructions and data, and the memory is located inside or outside the processor.

[0060] The chip system can be composed of chips, or can include chips and other discrete devices.

[0061] Among them, the effects that can be obtained from the second to eleventh aspects can be referred to the description in the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] FIG1 exemplarily shows a communication system used in an embodiment of the present application;

[0063] FIG2 exemplarily shows another communication system used in an embodiment of the present application;

[0064] FIG3 is a schematic diagram of a basic DRX model provided in this application;

[0065] FIG4 is a schematic diagram of improving throughput of an Scell ​​provided by the present application;

[0066] FIG5 is a schematic diagram of Scell ​​dormancy provided by this application;

[0067] FIG6 is a schematic diagram of a terminal device including LP-WUR provided in this application;

[0068] FIG7 is a flow chart of a communication method provided in one embodiment of the present application;

[0069] FIG8 is a flow chart of a communication method provided in one embodiment of the present application;

[0070] FIG9 is a flow chart of a communication method provided in another embodiment of the present application;

[0071] FIG10 is a structural diagram of a communication device provided in one embodiment of the present application;

[0072] FIG11 is a structural diagram of a communication device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0073] To facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. For example, the first information and the second information are used to distinguish different information and do not limit their order. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity or execution order, and words such as "first" and "second" do not necessarily mean that they are different.

[0074] It should be noted that, in this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.

[0075] The embodiments of the present application provide a communication method and device, wherein the method and device are based on the same technical concept. Since the principles of solving problems by the method and device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0076] The embodiments of the present application do not limit the communication system to which the technical solution provided by the present application can be applied, as long as the communication system includes a terminal under the LP-WUS configuration.

[0077] Exemplarily, the communication system applied to the technical solution provided in the present application can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband radio service (GPRS), a long term evolution (LTE) system, an advanced long term evolution (LTE-A), a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, a universal mobile telecommunication system (UMTS), a fifth generation mobile communication system, and some future communication systems (such as a sixth generation mobile communication system).

[0078] Exemplarily, the technical solutions provided in the embodiments of the present application can also be applied to device-to-device (D2D) communication systems, vehicle-to-everything (V2X) communication systems, machine-to-machine (M2M) communication systems, machine type communication (MTC) communication systems, and Internet of Things (IoT) communication systems.

[0079] In conjunction with Figure 1 , a communication system used in an embodiment of the present application is exemplarily provided. As shown in Figure 1 , the communication system includes a network device and a terminal device.

[0080] The network device may be any device with wireless transceiver function. The device includes but is not limited to: an evolved NodeB (eNB or eNodeB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a base band unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc. It can also be a gNB in ​​a 5G, such as NR, system, or a transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or it can also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), etc.

[0081] In some deployments, a gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). The CU implements some gNB functions, while the DU implements some gNB functions. For example, the CU implements the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers, while the DU implements the functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers. Because RRC layer information ultimately becomes physical layer information, or is converted from physical layer information, in this architecture, higher-layer signaling, such as RRC layer signaling, can also be considered to be sent by the DU, or by both the DU and the CU. It is understood that a network device can be a CU node, a DU node, or a device that includes both a CU node and a DU node. In addition, the CU can be divided into a network device in an access network (radio access network, RAN), and the CU can also be divided into a network device in a core network (core network, CN), which is not limited in this application.

[0082] A terminal device may be a device that provides voice and / or data connectivity to a user, for example, a handheld device with wireless connection capabilities, a vehicle-mounted device, etc. A terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile, remote station, remote terminal, mobile equipment, user terminal, wireless telecom equipment, user agent, user equipment, or user device. The terminal device can be a station (STA) in a wireless local area network (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 function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a terminal in a next-generation communication system (for example, a fifth-generation (5G) communication network) or a terminal device in a future-evolved public land mobile network (PLMN) network. Among them, 5G can also be referred to as a new radio (NR). In one possible application scenario of the present application, the terminal device can also be a terminal device that often works on the ground, such as a vehicle-mounted device. In this application, for the sake of convenience, the chip deployed in the above-mentioned device, or the chip can also be referred to as a terminal device.

[0083] In this application, the network device and the terminal device may communicate through the authorized spectrum, the unlicensed spectrum, or both. The network device and the terminal device may communicate through the spectrum below 6 gigahertz (GHZ), the spectrum above 6 GHZ, or both. The network device and the terminal device may communicate through the spectrum below 6 GHZ and the spectrum above 6 GHZ simultaneously. The embodiments of this application do not limit the spectrum resources used between the network device and the terminal device.

[0084] It will be understood that the number of terminal devices shown in FIG1 is merely an example, and the specific number of terminal devices does not constitute a limitation of the present application.

[0085] In conjunction with Figure 2, another communication system applied in an embodiment of the present application is exemplified. As shown in Figure 2, the communication system 2000 includes a terminal device 210 and a terminal device 220, and the terminal device 210 and the terminal device 220 can communicate with each other through wireless communication technology. Among them, the communication link between the terminal device 210 and the terminal device 220 can be called a side link or other names; the air interface for direct communication between the terminal device 210 and the terminal device 220 is called PC5 or other names, and this embodiment of the application is not limited to this. It should be understood that Figure 2 is only a simplified schematic diagram shown for ease of understanding. For example, the communication system 2000 may also include other devices, which are not drawn in Figure 2. For example, the communication system 2000 may also include access network equipment.

[0086] It should be noted that, whether it is the communication system shown in Figure 1 or the communication system shown in Figure 2, in the embodiment of the present application, the terminal device or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU) and a memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system or a Windows operating system. The application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software. In addition, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application, as long as it can communicate according to the method provided in the embodiment of the present application by running a program that records the code of the method provided in the embodiment of the present application. For example, the execution subject of the method provided in the embodiment of the present application can be a terminal device or a network device, or a functional module in a terminal device or a network device that can call a program and execute the program.

[0087] In addition, the methods of various aspects of the present application can be implemented using programming and form a computer program accessed by a computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memories (EPROMs), cards, sticks, or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0088] Currently, for the communication systems shown in Figures 1 or 2, discontinuous reception (DRX), Discontinuous Response (DCP), and Secondary Cell (Scell) sleep mechanisms are introduced to save power consumption in terminal devices. The following describes the DRX, Scell, and LP-WUS mechanisms, respectively.

[0089] 1. DRX Mechanism

[0090] The DRX mechanism configures a DRX cycle for a terminal device in a radio resource control (RRC) connected state. The DRX cycle consists of an "on duration" and an "opportunity for DRX." During the "on duration," the terminal device detects and receives the physical downlink control channel (PDCCH); during the "DRX opportunity" period, the terminal device does not detect the PDCCH to save power.

[0091] Among them, in this application, the "duration" time period is also referred to as the activation time period, and the "DRX opportunity" time period is also referred to as the deactivation time period. By way of example, Figure 3 is a schematic diagram of the DRX basic model provided by this application. As shown in Figure 3, a terminal device in an RRC connection state periodically enters an activation time period and a deactivation time period. When the terminal device enters the activation time period, the terminal device performs PDCCH detection, that is, the terminal device can be considered to be in a non-sleep state. When the terminal device enters the deactivation time period, the terminal device no longer performs PDCCH detection, that is, the terminal device can be considered to be in a sleep state, thereby achieving the purpose of reducing terminal power consumption.

[0092] Currently, a base station sends DRX configuration information to a terminal device so that the terminal device enters an activation mode within a specified time period based on the DRX configuration information, and enters a deactivation mode during the rest of the time, thereby achieving dormancy under the DRX mechanism.

[0093] 2. DCP Mechanism

[0094] DCP (DCI with CRC scrambled by PS-RNTI), also known as a wake-up signal (WUS), is sent by the network before the duration to indicate whether the terminal device should wake up for the next DRX opportunity. In CDRX, the terminal device periodically wakes up to check for scheduling. DCP, based on CDRX (i.e., DCP must be used in conjunction with CDRX), adds a WUS to indicate whether the terminal device should wake up for the next periodic check.

[0095] 3. Scell ​​dormancy mechanism

[0096] To improve peak rates and meet the requirements of enhanced mobile broadband (eMBB) scenarios, increasing cell bandwidth is a viable option. However, the maximum bandwidth of a single cell is fixed. Therefore, multiple cells can be used to provide services to terminal devices. This is the principle behind carrier aggregation (CA). Specifically, the bandwidth of multiple cells can be aggregated for use by terminal devices, essentially aggregating multiple component carriers (CCs). This results in a terminal device's bandwidth being the sum of the bandwidths of multiple carriers, thereby increasing both peak rates and system capacity to meet the increasingly demanding network speeds required by terminals.

[0097] There are two important concepts in CA: primary cell (Pcell) and secondary cell (Scell).

[0098] When the terminal device is configured with CA, when the terminal device has business data transmission, the network device can instruct the terminal device to transmit data on the SCell to provide higher throughput. For example, as shown in Figure 4, the cell of the terminal device includes Pcell, Scell1 and Scell2. When the terminal device transmits data in a non-sleep state, it transmits on Pcell, Scell1 and Scell2 at the same time, so a higher throughput can be obtained. However, since the business volume of Scell ​​is sparser than that of Pcell, in order to further reduce the power consumption of terminal devices, a Scell ​​sleep mechanism is introduced: when there is no data transmission on a certain SCell, the terminal device can enter a sleep state on the Scell. In this application, the Scell ​​that needs to be dormant is also referred to as a dormant Scell.

[0099] Specifically, under the Scell ​​dormancy mechanism, at least two downlink bandwidth parts (BWPs) are configured for each SCell of the terminal device, one of which is a dormant BWP (i.e., dormant BWP) and the others are non-dormant BWPs (also described as normal BWPs). When the terminal device activates the dormant BWP of the Scell, the corresponding terminal device enters a dormant state on the Scell. At this time, the terminal device only performs channel state information (CSI) measurements and does not detect the PDCCH. When the terminal device activates the normal BWP of the Scell, the corresponding terminal device enters a non-dormant state (or normal state) on the Scell. At this time, the terminal performs normal data transmission and needs to detect the PDCCH.

[0100] Specifically, the network device sends DCI to the terminal device on the PCell to instruct the terminal device whether to activate the dormant BWP or the normal BWP on the Scell. Alternatively, the network device sends DCI to the terminal device on the PCell to instruct the terminal device to switch between the dormant BWP and the normal BWP on the Scell. Alternatively, the dormant BWP and the normal BWP configured on the SCell are switched based on the DCI received on the PCell.

[0101] When the DCI instructs the terminal device to activate the dormant BWP (or is described as the DCI indicating switching to the dormant BWP), the terminal device activates the dormant BWP and then enters the dormant state on the Scell; when the DCI instructs to activate the normal BWP (or is described as the DCI indicating switching to the normal BWP), the terminal device activates the normal BWP and enters the non-dormant state on the Scell.

[0102] For example, as shown in FIG5 , when a Pcell, Scell ​​1, and Scell ​​2 are simultaneously serving a terminal device, if it is found that the terminal device has no data transmission on Scell ​​1 and Scell ​​2 for a period of time, the network device instructs the terminal device to activate the dormant BWPs of Scell ​​1 and Scell ​​2 to enter a dormant state on Scell ​​1 and Scell ​​2. In other words, the network device instructs the terminal device to switch the BWPs of Scell ​​1 and Scell ​​2 to the dormant BWP to enter a dormant state on Scell ​​1 and Scell ​​2.

[0103] The above describes three technologies that can be used to reduce terminal power consumption. Next, we will introduce another technology for reducing terminal device power consumption. This technology is also called LP-WUS technology. The following describes LP-WUS technology in detail.

[0104] It is understandable that, whether the current terminal device is receiving paging in the idle / inactive state or receiving data in the connected state, these functions are completed by the main receiver (or main circuit) in the terminal device. The main receiver mainly includes a radio frequency processing module and a baseband processing module. It is understandable that the main circuit (or main receiver) is only named for distinction, and its specific naming does not limit the scope of protection of this application. For ease of explanation, the following description is uniformly referred to as the main receiver.

[0105] In this application, the terminal device using the primary receiver to receive signals is also referred to as the terminal device working on the primary link. In other words, when the terminal device uses the primary receiver to receive signals, it can be considered that the primary link of the terminal device is in an operating state.

[0106] Under the LP-WUS technology, in order to reduce the power consumption of the terminal device, the terminal device can receive signals by using a separate low-power small circuit. Compared with the main receiver, the low-power small circuit is implemented by using a separate small circuit or chip with a simple structure, that is, the low-power small circuit has lower complexity, lower power consumption, and lower processing power (such as demodulation and calculation). The low-power small circuit can be called an auxiliary receiver, or a low-power wake-up signal receiver (lower power wake up receiver, LP-WUR), or a low-power wake-up circuit, or a low-power circuit, etc. Regarding its naming, this application is not limited. For the sake of convenience, the low-power small circuit will be uniformly described as an auxiliary receiver below. It can be understood that the auxiliary receiver is only named for distinction, and its specific naming does not limit the scope of protection of this application.

[0107] In this application, the terminal device using the auxiliary receiver to receive signals is also referred to as the terminal device working on the auxiliary link. In other words, when the terminal device uses the auxiliary receiver to receive signals, it can be considered that the auxiliary link of the terminal device is in an operating state.

[0108] Specifically, as shown in Figure 6, when the terminal device is working on the auxiliary link, the terminal device will detect the low power wake up signal (LP-WUS) sent by the network device. LP-WUS is used to indicate whether to wake up the main receiver that is turned off (or in a dormant state) in the terminal device, or it is also called LP-WUS for indicating whether to wake up the main link that is turned off (or in a dormant state) in the terminal device. When LP-WUS indicates to wake up the main link that is turned off (or in a dormant state) in the terminal device, the terminal device wakes up the main link. Waking up the main link means that the terminal device switches from the auxiliary link to the main link, or the terminal device switches from the auxiliary receiver to the main receiver.

[0109] It should be noted that this embodiment does not limit the specific form of the main receiver before waking up the turned-off (or sleeping) main receiver through LP-WUS. For example, the main receiver is in ultra-deep sleep, deep sleep, light sleep, or micro-sleep before being awakened. The difference between the different states is the different wake-up time (ramp up), and the wake-up time mainly refers to the time it takes for the related hardware of the main receiver to turn on. For example, the wake-up time of the ultra-deep sleep main receiver is 400ms.

[0110] Network devices usually configure various resources for terminal devices.

[0111] Currently, in a scenario where the receiver of a terminal device operates in an auxiliary link, if the base station wants the terminal device to activate the deactivated resources, the base station needs to first send a low power wake up signal (LP-WUS) to the terminal device to wake up the main link that is closed in the terminal device, and then send downlink control information (DCI) to the terminal device to instruct the deactivated resources to be set to the activated state. Accordingly, when the terminal device detects the DCI, the terminal device switches the deactivated resources to the activated state.

[0112] Alternatively, in a scenario where the receiver of the terminal device operates in an auxiliary link, if the base station wants the terminal device to deactivate the activated resources, the base station needs to first send a low power wake up signal (LP-WUS) to the terminal device to wake up the main link that is turned off in the terminal device, and then send downlink control information (DCI) to the terminal device to instruct the activated resources to be set to a deactivated state. Accordingly, when the terminal device detects the DCI, the terminal device switches the deactivated resources to an activated state.

[0113] For example, before the terminal device enters the auxiliary link operation, the network device instructs the terminal device to enter the dormant state on Scell1. This means that the network device instructs the terminal device to deactivate the normal BWP of Scell1 and then instructs the terminal device to enter the auxiliary link operation. Afterwards, if the network device wants to instruct the terminal device to activate the normal BWP of Scell1, or in other words, if the network device wants to instruct the terminal device to switch to the normal BWP on Scell1, the network device needs to first send an LP-WUS to the terminal device to wake up the main receiver, and then send a DCI to the terminal device to instruct the activation of the normal BWP of Scell1. Accordingly, the terminal device wakes up the main receiver based on the LP-WUS, and then continues to detect the DCI to activate the normal BWP of Scell1 after waking up the main receiver.

[0114] For example, before a terminal device enters auxiliary link operation, the network device instructs the terminal device to deactivate SPS resource 1, and then instructs the terminal device to enter auxiliary link operation. Later, if the network device wishes to instruct the terminal device to activate SPS resource 1, it first sends an LP-WUS message to the terminal device to wake up the primary receiver, and then sends a DCI message to the terminal device to instruct it to activate SPS resource 1. Accordingly, the terminal device wakes up the primary receiver based on the LP-WUS message, and then continues to detect DCI to activate SPS resource 1 after waking up the primary receiver. Here's an introduction to the concept of SPS resources: Dynamic scheduling is the commonly used scheduling method, where one DCI indicates one PDSCH or PUSCH. The terminal device first detects a DCI, then receives a PDSCH or transmits a PUSCH based on the DCI, before detecting the next DCI. Semi-persistent scheduling, as the name suggests, means that a single DCI or RRC reconfiguration message can indicate multiple (persistent) PDSCHs or PUSCHs. Once the terminal device receives a specific DCI or RRCreconfiguration message, it begins to periodically receive PDSCH or transmit PUSCH until this continuous scheduling stops. During this period of continuous scheduling, the terminal device no longer needs to detect DCI, which is the so-called semi-continuous scheduling. Compared with dynamic scheduling, it undoubtedly reduces the number of blind detections of DCI, so it reduces latency and power consumption for the terminal device. SPS is divided into two types: Type 1 and Type 2, and the activation method is related to the type: UL SPS can be either Type 1 or Type 2. Type 1 is activated through the RRCreconfiguration message, that is, it is activated at the same time as the UE receives the RRC configuration. Type 2 is configured first and then activated through PDCCH; DL SPS only has Type 2, that is, it can only be activated by RRC configuration first and then PDCCH activation.

[0115] It can be seen that in the above method, there is a problem of long delay in setting the resource status after the terminal device wakes up the main link.

[0116] To this end, the present application provides a communication method to reduce the delay in setting the resource status after waking up the main link when the terminal device operates in a secondary link.

[0117] The communication method provided by the present application is described below with reference to the accompanying drawings. The communication method may also be referred to as a resource status setting method or a resource status switching method.

[0118] Figure 7 is a schematic flow chart of the communication method provided by an embodiment of the present application. Figure 7 only describes the method from the perspective of the interaction between the terminal device and the access network device, and should not constitute any limitation to the present application. For example, the terminal device in Figure 7 can be replaced by a component configured in the terminal device (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions of the terminal device; the first access network device can be replaced by a component configured in the first access network device (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions or software of the first access network device; the second access network device can be replaced by a component configured in the second access network device (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions of the second access network device; the core network device can be replaced by a component configured in the core network device (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions of the core network device.

[0119] The method shown in Figure 7 includes steps 710 to 730. The following describes each step in the method shown in Figure 7 in detail.

[0120] Step 710: The terminal device enters the auxiliary link operation.

[0121] The terminal device enters the auxiliary link operation, that is, the terminal device enters the state of using the auxiliary receiver to receive signals.

[0122] It can be understood that if the terminal device works on the main link (i.e., the terminal device uses the main receiver to receive signals) before entering the auxiliary link, then when the terminal device enters the auxiliary link, it can also be considered that the terminal device switches from the main link to the auxiliary link.

[0123] Step 720: The access network device sends an LP-WUS to the terminal device; correspondingly, the terminal device receives the LP-WUS.

[0124] In this embodiment, the LP-WUS sent by the access network device to the terminal device includes information for instructing the terminal device to wake up the main link.

[0125] For example, the LP-WUS sent by the access network device includes information about one or more terminal devices that need to be awakened (such as UE ID). The one or more terminal devices may also be in the form of a terminal device group (UE group), and accordingly, the wake-up information may include the group identifier of the terminal device group. For a detailed description of the LP-WUS, please refer to the description in the related art and will not be repeated here.

[0126] Step 730: The terminal device switches to the main link of the terminal device based on LP-WUS and sets the state of the first resource.

[0127] In this embodiment, upon receiving the LP-WUS for waking up the primary link, the terminal device not only switches to the primary link but also sets the state of the first resource. That is, in this embodiment, the LP-WUS received by the terminal device can be considered a sufficient condition for setting the state of the first resource.

[0128] That is to say, in this embodiment, after the access network device sends LP-WUS to the terminal device, there is no need to send DCI specifically used to instruct the terminal device to switch the state of the first resource to the terminal device. Accordingly, after the terminal device wakes up the main link (that is, after switching to the main link), it directly sets the state of the first resource based on LP-WUS, without the need to detect the DCI sent by the access network device. Therefore, when the terminal device works in the auxiliary link scenario, the delay in setting the state of the first resource after switching to the main link can be reduced.

[0129] It should be noted that this embodiment does not limit the specific manner in which the terminal device sets the state of the first resource based on the LP-WUS.

[0130] Implementation Plan (1)

[0131] It can be understood that when the terminal device receives LP-WUS, it means that there is a high probability that there is a service scheduling terminal on the network side at this time. Therefore, in implementation scheme (1), if the first resource is a resource that is in a deactivated state when the terminal device operates in the auxiliary link, then the terminal device switches to the main link of the terminal device and sets the state of the first resource according to the LP-WUS, including: if LP-WUS is received, switching to the main link of the terminal device and switching the state of the first resource to an activated state.

[0132] Exemplarily, this embodiment does not limit the specific form of the resource in the deactivated state when the terminal device operates in the auxiliary link. Exemplarily, it can be any one of the following: the normal BWP (also called non-dormant BWP) of the Scell ​​of the terminal device in the deactivated state when the terminal device operates in the auxiliary link, or it can be the SPS resource / CG resource in the deactivated state when the terminal device operates in the auxiliary link, or, or it can be other uplink resources in the deactivated state when the terminal device operates in the auxiliary link.

[0133] In this solution (1), after receiving the LP-WUS for waking up the main link, the terminal device will not only switch to the main link operation, but also activate the first resource in the deactivated state, so that the state of the first resource becomes the activated state. It can be understood that under this technical solution, since the terminal device no longer needs to continue to detect the DCI sent by the access network device for activating the first resource after the main link is awakened, the delay of the terminal device in activating the first resource can be reduced, further reducing the service delay. In addition, it can be understood that for the access network device, this method also reduces the signaling overhead of the access network device indicating the activation of the first resource through DCI.

[0134] Implementation Plan (2)

[0135] When the access network device sends an LP-WUS to the terminal device, the LP-WUS carries first information, where the first information is used to indicate the state of the first resource after switching to the primary link. Accordingly, the terminal device switches to the primary link of the terminal device and sets the state of the first resource based on the LP-WUS, including: upon receiving the LP-WUS, switching to the primary link of the terminal device and setting the state of the first resource based on the first information.

[0136] That is, in this implementation, the LP-WUS sent by the access network device to the terminal device, in addition to indicating whether to wake up the main link of the terminal device, also indicates the status of the first resource. That is, the access network device simultaneously indicates to the terminal device the status of the first resource after switching to the main link through an LP-WUS. In this way, the access network device side does not need to send DCI to the terminal device to indicate the status of the first resource after instructing the terminal device to switch to the main link. For the terminal device side, after switching to the main link, there is no need to detect the DCI used to indicate the status of the first resource. Therefore, the delay of setting the status of the first resource after the terminal device switches to the main link is also improved.

[0137] It should be noted here that the specific form of the state of the first resource in implementation scheme 2) of this embodiment before and after the switching is not limited.

[0138] For example, the state of the first resource is a deactivated state before the switch and an activated state after the switch. In this scenario, in this embodiment, the first information is used to indicate the state of the first resource, that is, the first information is used to indicate whether the first resource is activated. Furthermore, if the first information indicates to activate the first resource, when LP-WUS is received, the main link of the terminal device is switched to and the first resource is activated, that is, the state of the first resource is switched from a deactivated state to an activated state. It can be understood that in this scenario, reducing the switching delay of the first resource can also be considered as reducing the delay in activating the first resource. Exemplarily, in this scenario, the first resource can be, for example, a normal BWP on a Scell ​​of the terminal device. Alternatively, the first resource can be, for example, an SPS / CG resource of the terminal device.

[0139] For another example, the state of the first resource is an activated state before the switch and a deactivated state after the switch. In this scenario, in this embodiment, the first information is used to indicate the state of the first resource, that is, the first information is used to indicate whether to deactivate the first resource. Furthermore, if the first information indicates to deactivate the first resource, when LP-WUS is received, the main link of the terminal device is switched to and the first resource is deactivated, that is, the state of the first resource is switched from an activated state to a deactivated state. It can be understood that in this scenario, reducing the switching delay of the first resource can also be considered to reduce the delay in deactivating the first resource.

[0140] Optionally, the first resource is a resource in the first resource group. Further, the first information carried by the access network device in the LP-WUS is used to indicate whether to switch the state of at least one resource in the first resource group, where the at least one resource includes the first resource.

[0141] For example, assume that a terminal device is configured with multiple Scells, each Scell ​​includes a dormant BWP and a normal BWP. The multiple Scells are in a dormant state when the terminal device operates in an auxiliary link, that is, when the terminal device operates in the auxiliary link, the normal BWPs in the multiple Scells are all deactivated. In this case, when the access network device sends an LP-WUS, it can include multiple bits in the LP-WUS, and the multiple bits correspond one-to-one to multiple Scells. Each bit is used to indicate whether the corresponding Scell ​​has activated a normal BWP (that is, each bit can also be considered to indicate whether the corresponding Scell ​​has deactivated the dormant BWP). For example, when each bit is 1, it is considered to indicate that the corresponding Scell ​​has activated a normal BWP. For the terminal device, after receiving the LP-WUS, if the bit corresponding to a certain Scell ​​indicates activation of the normal BWP, the terminal device switches to the primary link and activates the normal BWP of the certain Scell. For example, the certain Scell ​​leaves the dormant BWP and moves to the downlink BWP corresponding to firstOutsideActiveTimeBWP-Id or firstWithinActiveTimeBWP-Id. It can be understood that, in this example, the multiple bits can be considered as the content included in the above-mentioned first information; correspondingly, the normal BWP of a certain Scell ​​can be considered as the first resource.

[0142] For another example, the terminal device is configured with multiple SPS resources, and the multiple SPS resources are all in a deactivated state when the terminal device operates in an auxiliary link. Afterwards, when the access network device wakes up the terminal device through LP-WUS, it can include multiple bits in LP-WUS, and the multiple bits correspond one-to-one to the multiple SPS resources. For example, in this scenario, the multiple bits included in LP-WUS are bits included in the hybrid automatic repeat request (HARQ) process number field, and the bit corresponds to the SPS sps-ConfigIndex, and each bit is used to indicate whether the corresponding SPS resource is activated.

[0143] It can be seen that in the technical solution shown in the embodiment of Figure 7, after the access network device sends LP-WUS to the terminal device, there is no need to send DCI specifically used to indicate the status of the first resource of the terminal device to the terminal device. Accordingly, after the terminal device wakes up the main link (that is, after switching to the main link), the status of the first resource is directly set based on LP-WUS, without the need to detect the DCI sent by the access network device. Therefore, when the terminal device works in the auxiliary link scenario, the delay in switching the status of the first resource after switching to the main link can be reduced.

[0144] The embodiment shown in FIG7 is described in detail below in conjunction with FIG8 and FIG9. In the embodiment shown in FIG8, the switching of deactivated resource 1 to activated resource 1 is described, and in the embodiment shown in FIG9, the switching of activated WUS resource to deactivated WUS resource is described.

[0145] The method shown in Figure 8 includes steps 810 to 830. The following describes each step in the method shown in Figure 8 in detail.

[0146] Step 810: When the terminal device operates in the main link, the access network device instructs the terminal device to deactivate the activated resource 1; accordingly, the terminal device deactivates the resource 1.

[0147] It can be understood that the terminal device deactivates resource 1, that is, switches the state of resource 1 from an activated state to a deactivated state.

[0148] For example, if resource 1 is a normal BWP other than the dormant BWP on the first Scell ​​included in a terminal device, and this normal BWP is also referred to as the first BWP, then when the terminal device is operating in the primary link, the access network device may send second information to the terminal device, the second information being used to instruct the terminal device to go dormant on the first Scell. Accordingly, the terminal device goes dormant on the first Scell. It is understood that when the terminal device goes dormant on the first Scell, the terminal device activates the dormant BWP on the first Scell ​​and deactivates the first BWP. Therefore, the second information can be considered as instructing the terminal device to deactivate the first BWP.

[0149] For example, resource 1 is one SPS resource among at least one SPS resources included in the terminal device. This SPS resource is also called the first SPS resource. At this time, when the terminal device is working in the main link, the access network device sends the fifth information to the terminal device, and the fifth information is used to instruct the terminal device to deactivate the first SPS resource; accordingly, the terminal device deactivates the first SPS resource.

[0150] It should be noted that the normal BWP and SPS resources are merely used as examples here, but do not constitute a limitation of this application.

[0151] Step 820: The terminal device enters the auxiliary link operation.

[0152] It can be understood that when the terminal device enters the auxiliary link working period, resource 1 is in a deactivated state.

[0153] Step 830: The access network device sends an LP-WUS to the terminal device.

[0154] Step 840: After receiving the LP-WUS, the terminal device switches to the main link and switches the state of resource 1 from the deactivated state to the activated state according to the LP-WUS.

[0155] For example, upon receiving the LP-WUS, the terminal device switches to the primary link of the terminal device and sets the state of resource 1 to the active state. For example, if resource 1 is the first BWP described in step 800, then upon receiving the LP-WUS, the terminal device switches to the primary link and activates the normal BWP of the first Scell. In other words, the dormant BWP of the first Scell ​​is switched to a normal BWP, such as the BWP corresponding to the existing firstOutsideActiveTimeBWP-Id or firstWithinActiveTimeBWP-Id.

[0156] For another example, the access network device carries information 1 in the LP-WUS sent to the terminal device, and information 1 is used to indicate whether to activate resource 1; accordingly, if information 1 indicates to activate resource 1, when the terminal device receives the LP-WUS, it switches to the main link and switches the state of resource 1 from a deactivated state to an activated state.

[0157] It can be seen that in the communication method provided by this embodiment, after receiving the LP-WUS for waking up the main link, the terminal device will not only switch to the main link operation, but also activate the deactivated resource 1. It is understandable that under this technical solution, since the terminal device no longer needs to continue to detect the DCI sent by the access network device for activating resource 1 after the main link is awakened, the terminal device can reduce the delay in activating resource 1, further reducing the service delay. In addition, it is understandable that for the access network device, this method can also reduce the signaling overhead of the access network device indicating the activation of resource 1 through DCI.

[0158] Optionally, if the access network device instructs the terminal device to sleep on the first Scell, the terminal device still needs to perform some periodic CSI measurements. In this case, after the terminal device executes 810 to enter the auxiliary link, the terminal device needs to switch to the primary link to perform CSI measurements.

[0159] Optionally, in this embodiment, if the dormant BWP of the first Scell ​​included in the terminal device is in a deactivated state when the terminal device is operating in the auxiliary link, the CSI measurement in this scenario can be relaxed. For example, the access network device can send a third information to the terminal device when the terminal device is operating in the main link, and the third information is used to indicate the first CSI measurement period when the terminal device performs CSI measurement when the terminal device is dormant on the first Scell; then, the terminal device performs CSI measurement based on the second CSI measurement period, and the second CSI measurement period is greater than the first CSI measurement period. Optionally, the second CSI measurement period can be indicated by the access network device sending a fourth information to the terminal device, so the fourth information can also be called new period parameter information, for example, the fourth information is carried in the RRC message. It can be understood that through this implementation method, since the CSI measurement period becomes larger, the power consumption of the terminal device can be further reduced.

[0160] Optionally, in this embodiment, if the dormant BWP of the first Scell ​​included in the terminal device is in a deactivated state when the terminal device operates in the auxiliary link, the auxiliary link of the terminal device can assume measurement behavior equivalent to the periodic CSI measurement of the main link (this solution may have corresponding requirements for the auxiliary link hardware).

[0161] Figure 9 shows an embodiment of the transition from an activated state to a deactivated state. In the embodiment of Figure 9 , description is given assuming that both end devices are configured with LP-WUS and DCP resources (ie, first resources, also called WUS resources).

[0162] The method shown in Figure 9 includes steps 910 to 930. The following describes each step in the method shown in Figure 9 in detail.

[0163] Step 910: Terminal device 1 enters auxiliary link operation.

[0164] In step 920 , the access network device sends an LP-WUS to the terminal device 1 . The LP-WUS carries information for instructing to deactivate WUS resources.

[0165] In step 930 , the terminal device switches to the main link based on LP-WUS and does not detect signals on WUS resources.

[0166] That is, after the terminal device receives the LP-WUS, the terminal device switches to the main link and no longer detects the signal on the WUS resource.

[0167] Exemplarily, the signal on the WUS resource is called a WUS signal or a DCP signal.

[0168] Optionally, the access network device also instructs the terminal device 2 through the LP-WUS to detect signals on the WUS resources; accordingly, the terminal device 2 also performs the operation of detecting signals on the WUS resources after switching to the main link based on the LP-WUS. Optionally, after the terminal device 2 switches to the main link, if the terminal device does not detect a signal on the WUS resource within a period of time, it switches to the auxiliary link. The period of time mentioned here can be predefined by the protocol or configured by the network device. For example, the network device indicates to the terminal device through an RRC message or indicates to the terminal device through an SIB broadcast message.

[0169] Optionally, when the access network device instructs the terminal device to detect the WUS signal, if the WUS signal or DCP signal received by the terminal device indicates not to detect the PDCCH, the access network device can add 1 bit in the WUS signal or DCP signal to instruct the terminal device to enter the main link operation, or return to the auxiliary link operation.

[0170] The communication method provided in this embodiment uses LP-WUS to instruct the terminal device whether to continue detection on WUS after switching to the primary link. In addition, it can be understood that this technical solution allows the access network device to provide more flexible instructions to different terminal devices at the same time.

[0171] Above, Figures 7 to 9 introduce a method for setting the resource status after the terminal device switches to the main link based on LP-WUS. Optionally, in the present application, in a scenario where activated SPS resources / CG resources are configured in the terminal device, it is also possible to retain a portion of the activated SPS resources / CG resources and deactivate a portion of the SPS resources / CG resources, so that during the detection of LP-WUS by the terminal device, the terminal device switches to the main link at the corresponding retained activated resource position to perform actions such as receiving or sending signals. It is understandable that in this case, there is no need for the access network device to send LP-WUS to wake up the main link of the terminal device and then instruct the terminal device to detect PDCCH, thereby saving signaling overhead. Below, two implementation methods are explained by taking SPS resources as an example. However, it should be understood that this example does not constitute a limitation of the present application. For example, SPS resources can be replaced with CG resources, or replaced with other resources that can appear periodically.

[0172] Exemplarily, in implementation method a), before the terminal device enters the auxiliary link operation, the sixth information can be sent to the terminal device through the access network device, and the sixth information indicates the deactivation of M SPS resources among the N activated SPS resources, that is, the access network device allows the terminal device to deactivate a part of the SPS resources (M SPS resources are deactivated) and retain a part of the activated SPS resources (NM SPS resources remain activated) through the sixth information, where M and N are positive integers, and M is less than N.

[0173] Optionally, in implementation a), the SPS period of the deactivated M SPS resources is smaller than the SPS period of the retained NM SPS resources in the activated state. In other words, the SPS period corresponding to the M SPS resources is smaller than the SPS period corresponding to any SPS resource among the N SPS resources except the M SPS resources.

[0174] Exemplarily, in implementation b), new SPS resource period parameters applicable to LP-WUS terminals can be defined in the SPS configuration information (SPS-Config) (the corresponding SPS period is larger), for example, by adding a new ID sps-ConfigIndex. Accordingly, when the terminal device activates the LP-WUS, it deactivates the existing SPS resources, and activates the new SPS resources under the LP-WUS corresponding to the main link based on the added new sps-ConfigIndex. Optionally, the added new ID sps-ConfigIndex can be multiple, and accordingly, when the terminal device operates on the auxiliary link, there are multiple SPS resources in the activated state. For example, the SPS configuration information (SPS-Config) sent by the access network device defines K SPS resources, wherein P of the K SPS resources are existing SPS resources, and the remaining KP are newly added, and the SPS period corresponding to the newly added KP SPS resources is greater than the SPS period corresponding to the P SPS resources. Accordingly, when the terminal device operates on the auxiliary link, there are multiple SPS resources in the activated state.

[0175] The communication method of the embodiment of the present application is described in detail above in conjunction with Figures 7 to 9. The communication device provided in the present application will be described in detail below in conjunction with Figures 10 and 11.

[0176] FIG10 is a schematic structural diagram of a communication device provided by an embodiment of the present application. Specifically, as shown in FIG10 , the device 1000 includes: a transceiver module 1001 and a processing module 1002 .

[0177] In the first embodiment, the apparatus 1000 may be applied to a terminal device.

[0178] Specifically, the transceiver module 1001 is configured to receive an LP-WUS; the processing module 1002 is configured to switch to a main link of the terminal device and set a state of the first resource according to the LP-WUS.

[0179] In one possible implementation, the state of the first resource is in a deactivated state while the terminal device operates in the auxiliary link; the processing module 1002 is further used to: if LP-WUS is received, switch to the main link of the terminal device and set the state of the first resource to an activated state.

[0180] In one possible implementation, the LP-WUS carries first information, where the first information is used to indicate the status of the first resource. The processing module 1002 is further used to: upon receiving the LP-WUS, switch to the main link of the terminal device and set the status of the first resource according to the first information.

[0181] In a possible implementation, the first resource is a resource in a first resource group, the first information is used to indicate a state of at least one resource in the first resource group, and the at least one resource includes the first resource.

[0182] In one possible implementation, the state of the first resource is in a deactivated state while the terminal device operates in the auxiliary link; the first information is used to indicate the state of the first resource, including: the first information is used to indicate whether the first resource is activated; and the switching to the primary link of the terminal device and setting the state of the first resource according to the LP-WUS includes:

[0183] If the first information indicates activation of the first resource, upon receiving the LP-WUS, switching to the main link of the terminal device and activating the first resource.

[0184] In a possible implementation, the first resource is a first portion of bandwidth BWP included in a first secondary cell Scell, and the first Scell ​​further includes a dormant BWP; wherein, when the terminal device operates in the secondary link, the dormant BWP is activated and the first BWP is deactivated.

[0185] In one possible implementation, the transceiver module 1001 is further used to: receive second information when the terminal device operates in the main link, where the second information is used to instruct the terminal device to sleep on the first Scell; the processing module 1002 is further used to: sleep on the first Scell ​​in response to the second information; wherein, when sleeping on the first Scell, the sleep BWP is in an activated state and the first BWP is in a deactivated state.

[0186] In one possible implementation, the transceiver module 1001 is further used to: receive third information when the terminal device operates in the main link, where the third information is used to indicate the first CSI measurement period when the terminal device performs CSI measurement; the processing module 1002 is further used to: perform CSI measurement based on the second CSI measurement period, where the second CSI measurement period is greater than the first CSI measurement period.

[0187] In a possible implementation, the transceiver module 1001 is further configured to: receive fourth information, where the fourth information is used to indicate a second CSI measurement period.

[0188] In a possible implementation, the first resource is a first SPS resource.

[0189] In one possible implementation, the transceiver module 1001 is further used to: receive fifth information when the terminal device operates in the main link, and the fifth information is used to instruct the terminal device to deactivate the first SPS resource; the processing module 1002 is further used to: set the state of the first SPS resource to a deactivated state in response to the fifth information.

[0190] In one possible implementation, the first information is used to indicate the status of the first resource, including: the first information is used to indicate whether to deactivate the first resource; the processing module 1002 is further used to: if the first information indicates to deactivate the first resource, when LP-WUS is received, switch to the main link of the terminal device and do not detect the signal on the first resource.

[0191] In a possible implementation manner, the signal on the first resource is a wake-up signal WUS.

[0192] In one possible implementation, the processing module 1002 is further used to: switch from the main link of the terminal device to the auxiliary link of the terminal device if the first information indicates that the first resource is not deactivated and the terminal device does not detect a signal on the first resource within a first time period.

[0193] In the second embodiment, the apparatus 1000 may be applied to an access network device.

[0194] Specifically, the transceiver module 1001 is configured to send a low power consumption wake-up signal LP-WUS, where the LP-WUS carries first information, and the first information is used to indicate a state of a first resource.

[0195] In a possible implementation, the first resource is a resource in a first resource group, the first information is used to indicate a state of at least one resource in the first resource group, and the at least one resource includes the first resource.

[0196] In one possible implementation, the state of the first resource is in a deactivated state during the period when the terminal device operates in the auxiliary link; the first information is used to indicate the state of the first resource, including: the first information is used to indicate whether to activate the first resource.

[0197] In a possible implementation, the first resource is a first portion of bandwidth BWP included in a first secondary cell Scell, and the first Scell ​​further includes a dormant BWP; wherein, when the terminal device operates in the secondary link, the dormant BWP is activated and the first BWP is deactivated.

[0198] In a possible implementation, the transceiver module 1001 is configured to send second information when the terminal device operates in the primary link, where the second information is used to instruct the terminal device to sleep in the first Scell.

[0199] In one possible implementation, the transceiver module 1001 is used to send third information and fourth information when the terminal device operates in the main link, the third information is used to indicate the first CSI measurement period when the terminal device performs CSI measurement, and the fourth information is used to indicate the second CSI measurement period when the terminal device performs CSI measurement.

[0200] In a possible implementation, the first resource is a first SPS resource.

[0201] In a possible implementation, the transceiver module 1001 is configured to send fifth information when the terminal device operates in the primary link, where the fifth information is used to instruct the terminal device to deactivate the first SPS resource.

[0202] In a possible implementation manner, the first information is used to indicate a state of a first resource, including: the first information is used to indicate whether to deactivate the first resource.

[0203] In a possible implementation, the signal on the first resource is a wake-up signal WUS.

[0204] Figure 11 is a schematic structural diagram of a communication device provided in another embodiment of the present application. The device shown in Figure 11 can be used to execute the method described in any of the above embodiments.

[0205] As shown in Figure 11, the apparatus 1100 of this embodiment includes a memory 1101 and a processor 1102. In one implementation, the apparatus 1100 further includes a communication interface 1103 and a bus 1104. The memory 1101, the processor 1102, and the communication interface 1103 are communicatively connected to each other via the bus 1104.

[0206] The memory 1101 may be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1101 may store a program. When the program stored in the memory 1101 is executed by the processor 1102, the processor 1102 is configured to perform the steps of the method shown in Figures 7 to 9.

[0207] The processor 1102 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits to execute relevant programs to implement the methods shown in Figures 7 to 9 of the present application.

[0208] The processor 1102 may also be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the method of Figures 7 to 9 of the embodiment of the present application may be completed by an integrated logic circuit of hardware in the processor 1102 or by instructions in the form of software.

[0209] The processor 1102 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The processor 1102 may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or a conventional processor.

[0210] The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1101, and the processor 1102 reads the information in the memory 1101 and, in combination with its hardware, completes the functions required to be performed by the units included in the device of the present application. For example, the various steps / functions of the embodiments shown in Figures 7 to 9 can be executed.

[0211] The communication interface 1103 may use, but is not limited to, a transceiver or other transceiver device to implement communication between the apparatus 1100 and other devices or a communication network.

[0212] The bus 1104 may include a path for transmitting information between various components of the device 1100 (eg, the memory 1101 , the processor 1102 , and the communication interface 1103 ).

[0213] It should be understood that the apparatus 1100 shown in the embodiment of the present application can be an electronic device, or a chip configured in an electronic device. The apparatus 1100 can be deployed in a terminal device, or can also be deployed in a network device.

[0214] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the above embodiments 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 or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in 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 device. 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 one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be an available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0215] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. A and B can be singular or plural. Furthermore, the character " / " as used herein generally indicates an "or" relationship between the associated objects, but it may also indicate an "and / or" relationship. For specific understanding, please refer to the context.

[0216] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0217] 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 a limitation on the implementation process of the embodiments of the present application.

[0218] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0219] 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.

[0220] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0221] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0222] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0223] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

Claims

1. A communication method, characterized in that, Applied to a terminal device, including: Receiving a low-power wake-up signal LP-WUS; According to the LP-WUS, switching to the main link of the terminal device and setting the state of a first resource.

2. The method according to claim 1, wherein The state of the first resource is in a deactivated state during the period when the terminal device operates on the secondary link; The switching to the main link of the terminal device and setting the state of the first resource according to the LP-WUS includes: If the LP-WUS is received, switching to the main link of the terminal device and setting the state of the first resource to an activated state.

3. The method according to claim 1, wherein The LP-WUS carries first information, and the first information is used to indicate the state of the first resource; The switching to the main link of the terminal device and setting the state of the first resource according to the LP-WUS includes: When the LP-WUS is received, switching to the main link of the terminal device and setting the state of the first resource according to the first information.

4. The method according to claim 3, wherein The first resource is a resource in a first resource group, the first information is used to indicate the state of at least one resource in the first resource group, and the at least one resource includes the first resource.

5. The method according to claim 3 or 4, characterized in that, The state of the first resource is in a deactivated state during the period when the terminal device operates on the secondary link; The first information is used to indicate the state of the first resource, including: the first information is used to indicate whether to activate the first resource; The switching to the main link of the terminal device and setting the state of the first resource according to the LP-WUS includes: If the first information indicates to activate the first resource, when the LP-WUS is received, switching to the main link of the terminal device and activating the first resource.

6. The method according to claim 5, wherein The first resource is a first bandwidth part BWP included in a first secondary cell Scell, and the first Scell further includes a dormant BWP; Wherein, during the period when the terminal device operates on the secondary link, the dormant BWP is in an activated state and the first BWP is in a deactivated state.

7. The method according to claim 6, characterized in that, The method further includes: When the terminal device operates on the main link, receiving second information, where the second information is used to indicate that the terminal device goes to sleep on the first Scell; In response to the second information, going to sleep on the first Scell; Wherein, when going to sleep on the first Scell, the dormant BWP is in an activated state and the first BWP is in a deactivated state.

8. The method according to claim 7, wherein The method further includes: When the terminal device operates on the main link, receiving third information, where the third information is used to indicate a first CSI measurement period when the terminal device performs channel state information CSI measurement; Performing CSI measurement based on a second CSI measurement period, and the second CSI measurement period is greater than the first CSI measurement period.

9. The method according to claim 8, wherein The method further includes: Receiving fourth information, where the fourth information is used to indicate the second CSI measurement period.

10. The method according to claim 5, characterized in that The first resource is a first semi-persistent scheduling SPS resource.

11. The method according to claim 10, characterized in that, The method further includes: When the terminal device operates on the main link, receiving fifth information, where the fifth information is used to indicate that the terminal device deactivates the first SPS resource; In response to the fifth piece of information, set the state of the first SPS resource to the deactivated state.

12. The method according to claim 3 or 4, characterized in that, The first piece of information is used to indicate the state of the first resource, including: the first piece of information is used to indicate whether to deactivate the first resource; According to the LP-WUS, switch to the primary link of the terminal device and set the state of the first resource, including: If the first piece of information indicates deactivating the first resource, when receiving the LP-WUS, switch to the primary link of the terminal device and do not perform signal detection on the first resource.

13. The method according to claim 12, characterized in that, The signal on the first resource is the wake-up signal WUS.

14. The method according to claim 12 or 13, characterized in that, The method further includes: If the first piece of information indicates that the first resource is not deactivated and the terminal device does not detect a signal on the first resource within a first duration, switch from the primary link of the terminal device to the secondary link of the terminal device.

15. A communication method, characterized in that, Applied to an access network device, including: Send a low-power wake-up signal LP-WUS, where the LP-WUS carries the first piece of information, and the first piece of information is used to indicate the state of the first resource.

16. The method according to claim 15, characterized in that, The first resource is one resource in the first resource group, and the first piece of information is used to indicate the state of at least one resource in the first resource group, and the at least one resource includes the first resource.

17. The method according to claim 15 or 16, characterized in that, The state of the first resource is the deactivated state during the period when the terminal device operates on the secondary link; The first piece of information is used to indicate the state of the first resource, including: the first piece of information is used to indicate whether to activate the first resource.

18. The method according to claim 17, characterized in that, The first resource is the first bandwidth part BWP included in the first secondary cell Scell, and the first Scell further includes a dormant BWP; Wherein, during the period when the terminal device operates on the secondary link, the dormant BWP is in the activated state and the first BWP is in the deactivated state.

19. The method according to claim 18, wherein The method further includes: When the terminal device operates on the primary link, send the second piece of information, and the second piece of information is used to indicate that the terminal device goes to sleep on the first Scell.

20. The method according to claim 19, wherein The method further includes: When the terminal device operates on the primary link, send the third piece of information and the fourth piece of information, the third piece of information is used to indicate the first CSI measurement period when the terminal device performs channel state information CSI measurement, and the fourth piece of information is used to indicate the second CSI measurement period when the terminal device performs CSI measurement.

21. The method according to claim 15, wherein The first resource is the first semi-persistent scheduling SPS resource.

22. The method according to claim 21, wherein The method further includes: When the terminal device operates on the primary link, send the fifth piece of information, and the fifth piece of information is used to indicate that the terminal device deactivates the first SPS resource.

23. The method according to claim 15 or 16, characterized in that, The first piece of information is used to indicate the state of the first resource, including: the first piece of information is used to indicate whether to deactivate the first resource.

24. The method according to claim 23, wherein The signal on the first resource is the wake-up signal WUS.

25. A communication device, characterized in that, Includes: A processor, The processor is used to make the communication device implement the method according to any one of claims 1 to 14 by executing a computer program and / or through logic circuits.

26. A communication device, characterized in that, Includes: A processor, The processor is configured to cause the communication device to implement the method according to any one of claims 15 to 24 by executing a computer program and / or by means of logic circuitry.

27. A computer-readable medium, characterized in that, The computer-readable medium stores program code for execution by a computer, the program code including instructions for performing the method according to any one of claims 1 to 14 or 15 to 24.

28. A computer program product, characterized in that, The computer program product includes computer program code which, when run on a computer, causes the computer to implement the method according to any one of claims 1 to 14 or 15 to 24.

29. A chip, characterized in that, Comprising at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to run a computer program or instructions to perform the communication method according to any one of claims 1 to 14 or 15 to 24.

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