WO2023279865A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2023279865A1
WO2023279865A1 PCT/CN2022/094210 CN2022094210W WO2023279865A1 WO 2023279865 A1 WO2023279865 A1 WO 2023279865A1 CN 2022094210 W CN2022094210 W CN 2022094210W WO 2023279865 A1 WO2023279865 A1 WO 2023279865A1
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WO
WIPO (PCT)
Prior art keywords
information
time window
pdcch
data
time
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PCT/CN2022/094210
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English (en)
French (fr)
Inventor
黄雯雯
铁晓磊
周涵
张战战
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华为技术有限公司
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Publication of WO2023279865A1 publication Critical patent/WO2023279865A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the technical field of mobile communication, and in particular to a communication method and device.
  • Extended reality (extended reality, XR) and cloud gaming (cloud gaming, CG) are important application scenarios of 5G.
  • XR is a general term for different types of reality, which refers to the combination of reality and virtual environment and human-computer interaction generated by computers or wearable devices.
  • the types of XR include augmented reality (AR), mixed reality (mixed reality, MR), virtual reality (virtual reality, VR) and so on.
  • One of the characteristics of the XR service and the CG service is that there is a time domain jitter within a certain range when the video frame (video frame) (or called the picture frame (scene frame), or called the slice (slice)) arrives at the base station, that is On the basis of periodic arrival, the video frame may arrive at the base station in advance, or it may arrive at the base station later.
  • the base station sends video frames of XR service and CG service to user equipment (UE) through the air interface
  • UE user equipment
  • Connected mode-discontinuous reception is a current solution for reducing UE power consumption in the connected state.
  • the UE normally monitors the PDCCH according to the candidate position of the physical downlink control channel (PDCCH) during the activation time, and stops monitoring the PDCCH used for certain functions during the inactive time.
  • the PDCCH includes the PDCCH used to schedule data, so the UE reduces power consumption by reducing PDCCH monitoring during inactive time.
  • the activation time includes at least the running time of the active period timer (drx-onDurationTimer).
  • the UE starts the drx-onDurationTimer after several timeslot offsets in the subframe at the beginning of the C-DRX cycle. So the start time of drx-onDurationTimer is fixed. Due to time-domain jitter in the arrival time of video frames for XR services and CG services, if the UE monitors the PDCCH according to the fixed drx-onDurationTimer, the activation time of C-DRX will not match the arrival time of video frames, which will affect service transmission. delay and terminal power consumption.
  • the existing C-DRX mechanism is not suitable for XR and CG services. It is necessary to provide a suitable power saving solution for XR and CG services, and minimize the impact on service transmission delay. .
  • the present application provides a communication method and device, which provide a partial monitoring method suitable for XR/CG services, so as to reduce UE power consumption during XR/CG service data transmission and ensure high transmission reliability.
  • a communication method can be implemented by a terminal device, which can be a terminal device or a component in a terminal device.
  • a terminal device is, for example, a UE.
  • the terminal device can be used to receive data from the base station, and the data can be data of XR service or CG service.
  • the communication method includes: the terminal device determines location information of a first time window.
  • the terminal device monitors first information within the first time window.
  • the terminal device monitors the first PDCCH at the first PDCCH candidate position, the first PDCCH candidate position is a PDCCH candidate position after at least the Nth symbol after the terminal device monitors the first information, the The first information is used to determine that there is first data to be transmitted to the terminal device, the first PDCCH is used to schedule the first data, and N is a non-negative number.
  • the terminal device determines the location information of the second time window, the location information of the second time window is carried on the first PDCCH, the PDSCH carrying the first data or the first information, and the second time window
  • the window is used for the terminal device to receive second information, and the second information is used for determining that there is second data to be transmitted to the terminal device.
  • the reduction method reduces the number of times the UE blindly detects the PDCCH, which can reduce the impact on the transmission delay of the service as much as possible while reducing the power consumption of the UE.
  • the terminal device if the terminal device does not hear the first information within the first time window, the terminal device The first PDCCH is monitored within the time window.
  • the terminal device may further receive first time information, where the first time information is used to indicate the value of N.
  • the terminal device may receive the location information of the first time window, and the location information of the first time window includes the period of the first time window, the period of the first time window At least one of an offset in one cycle, a starting position of the first time window, and a length of the first time window.
  • the terminal device can monitor the first information according to the received configuration information of the first time window, thereby avoiding the waste of power consumption caused by the continuous monitoring of the first information by the UE.
  • the terminal device may further send third information, where the third information is used to request location information of the first time window.
  • the terminal device may further send fourth information, where the fourth information is used to request location information of the second time window.
  • the terminal device may determine the position information of the first time window according to a first parameter, where the first parameter includes the frame rate of the first data and/or the time domain jitter of the first data scope.
  • the terminal device can determine the location information of the first time window to monitor the first information without receiving the configuration information of the first time window.
  • the terminal device uses the location information of the time window carried in the RRC signaling as the location information of the second time window; or,
  • the terminal device If the terminal device does not detect the location information of the second time window in the first PDCCH, the PDSCH carrying the first data, and the first information, the terminal device will The frame rate is used to determine the position information of the second time window.
  • a communication method can be implemented by network equipment, and the network equipment can be a base station or components in the base station.
  • the network device can be used to send data to the UE, and the data can be XR service or CG service data.
  • the communication method includes: the network device determines the location information of the first time window.
  • the network device sends the first information within the first time window, and sends the first PDCCH at a first PDCCH candidate position, where the first PDCCH candidate position is at least one time after the network device sends the first information
  • the first information is used to determine that there is first data to be transmitted to the terminal device
  • the first PDCCH is used to schedule the first data
  • N is a non-negative number.
  • the first PDCCH, the PDSCH carrying the first data, or the first information is also used to carry position information of a second time window, and the second time window is used for the network device to send the second information , the second information is used to determine that there is second data to be transmitted to the terminal device.
  • the network device may further send first time information, where the first time information is used to indicate the value of N.
  • the network device may also send the location information of the first time window to the terminal device, where the location information of the first time window includes the period of the first time window, the at least one of an offset of the first time window in one cycle, a starting position of the first time window, and a length of the first time window.
  • the network device may further receive third information, where the third information is used to request location information of the first time window.
  • the network device may further receive fourth information, where the fourth information is used to request location information of the second time window.
  • the network device may determine the position information of the first time window according to a first parameter, where the first parameter includes the frame rate of the first data and/or the frame rate of the first data time-domain jitter range.
  • the network device uses the location information of the time window carried in the RRC signaling as the location information of the second time window; or, the network device , determining the location information of the second time window.
  • an embodiment of the present application provides a communications device that can implement the method implemented by a terminal device in the first aspect or any possible design thereof.
  • the apparatus comprises corresponding units or components for performing the method described above.
  • the units included in the device may be implemented by software and/or hardware.
  • the device may be, for example, a terminal device, or a chip, a chip system, a vehicle communication module, or a processor that can support the implementation of the above method in the terminal device.
  • the communication device may include modular components such as a transceiver unit (or a communication module, a transceiver module) and a processing unit (or a processing module), and these modules may implement the above-mentioned first aspect or any possible design thereof The corresponding function of the terminal device.
  • the transceiver unit may be a sending unit when performing the sending step
  • the transceiver unit may be a receiving unit when performing the receiving step
  • the transceiver unit may be replaced by a transceiver
  • the sending unit may be replaced by a transmitter
  • the receiving unit may be replaced by a transmitter.
  • Units can be replaced by receivers.
  • the transceiver unit may include an antenna and a radio frequency circuit, etc., and the processing unit may be a processor, such as a baseband chip.
  • the transceiver unit may be a radio frequency unit, and the processing unit may be a processor.
  • the transceiver unit may be an input-output interface of the system-on-a-chip, and the processing unit may be a processor of the system-on-a-chip, such as a central processing unit (CPU).
  • CPU central processing unit
  • the transceiver unit may be used to perform the receiving and/or sending actions performed by the terminal device in the first aspect or any possible design thereof.
  • the processing unit may be used to perform actions other than reception and transmission performed by the terminal device in the first aspect or any possible design thereof.
  • the communication device may include a transceiver module and/or a communication module.
  • the communication device may include a processor and/or a transceiver.
  • the communications device may also include memory.
  • the embodiment of the present application provides a communication device that can implement the method implemented by the network device in the second aspect or any possible design thereof.
  • the apparatus comprises corresponding units or components for performing the method described above.
  • the units included in the device may be implemented by software and/or hardware.
  • the apparatus may be, for example, a network device, or a chip, a chip system, or a processor that can support the implementation of the foregoing method in the network device.
  • the communication device may include modular components such as a transceiver unit (or communication module, transceiver module) and a processing unit (or processing module), and these modules may implement the above second aspect or any possible design thereof The corresponding function of the first terminal device in .
  • the transceiver unit may be a sending unit when performing the sending step
  • the transceiver unit may be a receiving unit when performing the receiving step
  • the transceiver unit may be replaced by a transceiver
  • the sending unit may be replaced by a transmitter
  • the receiving unit may be replaced by a transmitter.
  • Units can be replaced by receivers.
  • the transceiver unit may include an antenna and a radio frequency circuit, etc., and the processing unit may be a processor, such as a baseband chip.
  • the transceiver unit may be a radio frequency unit, and the processing unit may be a processor.
  • the transceiver unit may be an input-output interface of the system-on-a-chip, and the processing unit may be a processor of the system-on-a-chip, such as a CPU.
  • the transceiver unit may be used to perform the actions of receiving and/or sending performed by the network device in the second aspect or any possible design thereof.
  • the processing unit may be used to perform actions other than reception and transmission performed by the network device in the second aspect or any possible design thereof.
  • the communication device may include a transceiver module and/or a communication module.
  • the communication device may include a processor and/or a transceiver.
  • the communications device may also include memory.
  • a communication system in a fifth aspect, includes the communication devices shown in the third aspect and the fourth aspect.
  • a computer-readable storage medium which is used for storing computer instructions or programs, and when the computer instructions or programs are run on a computer, the computer is made to perform the above-mentioned first to second aspects.
  • a computer program product which, when running on a computer, causes the computer to execute the method described in the first aspect to the second aspect or any possible design thereof.
  • a circuit is provided, the circuit is coupled to a memory, and the circuit is used to execute the method described in the first aspect to the second aspect or any possible implementation manner thereof.
  • the circuit may include a circuit on a chip, a chip or a system on a chip, and the like.
  • beneficial effects of the above second to eighth aspects and their possible designs can refer to the beneficial effects of the first aspect and their possible designs.
  • Fig. 1 is a schematic diagram of a data packet cycle provided by the present application
  • FIG. 2 is a schematic diagram of a data packet jitter range provided by the present application.
  • FIG. 3 is a schematic diagram of a C-DRX mechanism provided by the present application.
  • FIG. 4A is a schematic diagram of another C-DRX mechanism provided by the present application.
  • FIG. 4B is a schematic diagram of another C-DRX mechanism provided by the present application.
  • FIG. 5 is a schematic diagram of another C-DRX mechanism provided by the present application.
  • FIG. 6 is a schematic structural diagram of a communication system provided by the present application.
  • FIG. 7 is a schematic structural diagram of a communication device provided by the present application.
  • FIG. 8 is a schematic structural diagram of another communication device provided by the present application.
  • FIG. 9 is a schematic flowchart of a communication method provided by the present application.
  • FIG. 10 is a schematic diagram of a time-domain position of a first time window provided by the present application.
  • FIG. 11 is a time-domain schematic diagram of a first PDCCH candidate position provided by the present application.
  • FIG. 12 is a schematic diagram of power consumption in a process of a UE monitoring first data and second data provided in the present application.
  • a terminal device such as a terminal device, or a module for implementing functions of the terminal device, such as a system-on-a-chip, and the system-on-a-chip may be set in the terminal device.
  • Terminal equipment includes equipment that provides data connectivity to users, specifically, includes equipment that provides data connectivity to users, or includes equipment that provides data connectivity to users. Examples may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a radio access network (radio access network, RAN), exchange data with the RAN, or exchange data with the RAN.
  • radio access network radio access network
  • the terminal equipment may include user equipment, wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, V2X terminal equipment, machine-to-machine/machine-type communication (machine-to-machine/ machine-type communications, M2M/MTC) terminal equipment, and Internet of Things (IoT) terminal equipment.
  • device-to-device communication device-to-device, D2D
  • V2X terminal equipment machine-to-machine/machine-type communication
  • machine-to-machine/machine/ machine-type communications machine-to-machine/ machine-type communications
  • IoT Internet of Things
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc., which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the various terminal devices described above if located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as vehicle-mounted terminal devices, and the vehicle-mounted terminal devices are also called on-board units (onBoard unit, OBU).
  • the terminal device may further include a relay (relay).
  • relay relay
  • a terminal device may be described by taking UE as an example.
  • the UE in this application may also be replaced with a terminal device, a terminal device, or the like.
  • Access network equipment may include but not limited to: next generation base station (gNB) in 5G, evolved node B (evolved node B) in LTE, eNB), baseband unit (baseBand unit, BBU), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center, and can also be an evolutionary (evolutional) NB (eNB in LTE) or eNodeB), it can also be a base station device in a future 5G network or an access network device in a future evolved PLMN network, or it can be a wearable device or a vehicle-mounted device.
  • gNB next generation base station
  • eNB evolved node B
  • baseband unit baseband unit
  • TRP transmission point
  • TP transmission point
  • mobile switching center and can also be an evolutionary (evolutional) NB (eNB in LTE) or eNodeB)
  • eNB evolved node B
  • baseband unit baseband unit
  • TRP transmission point
  • the communication between the terminal device and the network equipment can be performed through the air interface.
  • radio resource control radio resource control
  • DCI downlink control information
  • other air interface signaling and data are transmitted between the terminal device and the network equipment through the air interface.
  • the access network device may also communicate with other network devices through the interface.
  • the access network device can communicate with other access network devices through the interface between the access network devices; and/or, the access network device can communicate with the core network through the interface between the access network device and the core network device Devices communicate, for example, receive data from the core network.
  • the present application does not specifically limit the communication manner between the access network device and other network devices.
  • network equipment refers to access network equipment.
  • network equipment and/or access network equipment may be represented by a base station.
  • the network device may include a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU).
  • CU and DU can be deployed as a network node, which is called centralized deployment; or they can be deployed as independent network nodes, which is called distributed deployment.
  • CU and DU can be connected through the F1 interface between CU and DU. to communicate.
  • the interface between CU and DU includes F1 interface and other interfaces between CU and DU.
  • the access network device may also include an active antenna unit (active antenna unit, AAU).
  • the CU can realize some functions of the network equipment, and the DU can realize some functions of the network equipment.
  • the CU is responsible for processing non-real-time protocols and services, and realizes the functions of the RRC layer or the packet data convergence protocol (PDCP) layer.
  • the CU may include a control panel (control plane, CP) and a user panel (user plane, UP).
  • the CP and UP communicate through the E1 interface.
  • the DU can be responsible for processing physical layer protocols and real-time services, realizing the functions of the radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer and physical (physical, PHY) layer.
  • AAU can be used to implement some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer messages, can also be considered to be sent by the DU , or, sent by DU and AAU.
  • the access network device may be a device including one or more items of CU, DU or AAU.
  • the CU can be divided into devices in the access network, or the CU can be regarded as an access network device.
  • the CU can also be divided into devices in a core network (core network, CN), or the CU can be used as a core network device, which is not limited in this application.
  • core network CN
  • the device for realizing the function of the network device may be a network device, or a device capable of supporting the network device to realize the function, such as a chip system, and the device may be installed in the network device.
  • a network device may be described by using a base station as an example.
  • XR services and CG services are one of the important application scenarios of 5G.
  • the XR service and CG service have higher user experience requirements, and have the characteristics of high speed and low delay.
  • the transmission process of the downlink video frames of the XR service and the CG service will be described below.
  • the server processing the XR service or CG service can generate video frames through content rendering or encoding processes, and send the video frames to the base station.
  • the base station caches the data of the video frames and transmits them to the UE through the air interface. After receiving the data, the UE performs Decoding and other operations.
  • a video frame can be divided into one or more Internet protocol (internet protocol, IP) packets (IP packet).
  • IP Internet protocol
  • a data packet can be understood as data composed of a video frame of an XR service or a CG service, that is, a data packet can be understood as a general term for one or more IP packets, and the size of a data packet can represent the number of bits of a video frame .
  • the average rate of the application layer can reach 45 megabits per second (Mbps) or higher, and the time between when a data packet arrives at the base station and when the UE successfully receives the data packet does not exceed 10 milliseconds (ms).
  • the average rate of the application layer of the CG downlink service can reach 30Mbps or higher, and the time between when a data packet arrives at the base station and when the UE successfully receives the data packet does not exceed 15ms.
  • an IP packet may be divided into multiple transport blocks (transport block, TB) and transmitted to the UE through the air interface.
  • transport block, TB transport block
  • one TB occupies one time slot (slot) or several symbols (symbols) in one time slot, and one TB can also be sent repeatedly in multiple time slots or different symbols.
  • the reciprocal of the frame rate usually the frame rate can be 60 frames per second (frame per second, FPS) or 30FPS, 90FPS, or 120FPS.
  • FPS frame per second
  • the frame rate is the frequency at which data packets arrive at the base station.
  • 60FPS means that there are 60 data packets within 1 second, and the period is 1/60, which is approximately equal to 16.67 milliseconds, that is, a data packet arrives at the base station every 16.67 milliseconds on average, and is to be transmitted to the UE.
  • data packets of XR services and CG services have time-domain jitter within a certain range, that is, data packets may arrive at the base station before the arrival time determined according to the period, or may It will arrive at the base station after the arrival time determined according to the period.
  • the base station also has time-domain jitter when sending the data packets of the XR service and the CG service to the UE through the air interface, so the data packets of the XR service and the CG service are not strictly in accordance with the period.
  • the arrival time of the data packet is jittered within a certain range.
  • the data packet may arrive at the base station before or after the arrival time domain position determined according to the period (that is, the scheduled arrival time in Figure 2), for example, the kth data packet in Figure 2 Arriving early, the k+1th packet arrives late, causing time domain jitter.
  • the base station scheduler strategy In addition, due to factors of the base station scheduler strategy, after the base station receives the data packet, there is also a certain time range of jitter when scheduling the UE.
  • the present invention mainly takes the downlink business as an example.
  • the base station For uplink services, the base station also needs to send the PDCCH carrying uplink scheduling information to the UE, and the UE also needs to monitor the PDCCH, so the embodiments of the present invention are also applicable to the transmission of uplink services.
  • each data packet follows a probability distribution
  • the time domain jitter of each data packet follows a probability distribution
  • the time domain position where the data packet is scheduled to arrive is determined according to the period of the data packet. Taking the scheduled arrival time domain position as the reference point, the data packet may arrive at any time within the range of [-P, Q] ms.
  • the XR service and the CG service are quasi-periodic, there is not always data transmission. If the UE is in the state of monitoring the PDCCH for a long time, the power consumption of the UE will be too high. This is because the UE needs to blindly detect the PDCCH to obtain the scheduling information of uplink/downlink data. If the base station has no data to transmit to the UE and does not need to send the PDCCH to the UE, the blind detection of the PDCCH will cause waste of power consumption for the UE.
  • the monitoring mechanism of the PDCCH and the existing power consumption reduction mechanism are introduced below.
  • One of the functions of the PDCCH is to carry the scheduling information of uplink or downlink data.
  • the UE needs to monitor the PDCCH periodically to obtain the scheduling information, and the period may be 1 time slot. If it is detected that the PDCCH has scheduling information, for the downlink scheduling information, the UE can receive data through the physical downlink shared channel (PDSCH) according to the scheduling information, and for the uplink scheduling information, the UE can receive data through the physical uplink shared channel (physical downlink shared channel) according to the scheduling information uplink shared channel, PUSCH) to send data.
  • the PDCCH can also be used to carry information such as an uplink power control command word and a time slot format.
  • the PDCCH carrying different control information may use different radio network temporary identifiers (radio network temporary identifier, RNTI) for scrambling.
  • the base station can configure at least one search space set (search space set, SS set) for the UE.
  • UE monitors PDCCH based on SS set. Specifically, the UE monitors the PDCCH according to the parameters of the SS set.
  • the configuration information of each SS set includes at least one of the following parameters:
  • the control resource set (CORESET) identifier associated with the SS set wherein, CORESET represents a time-frequency resource set for carrying PDCCH, and a CORESET consists of several continuous or discontinuous
  • the resource block (resource block, RB) consists of 1 or more consecutive symbols in the time domain.
  • the UE can monitor the PDCCH on the CORESET associated with the SS set according to the parameters of the SS set, such as the monitoring period, offset or monitoring pattern.
  • the PDCCH monitoring period Ks and the offset Os, the value unit of Ks and Os may be a time slot (slot).
  • In-slot PDCCH monitoring pattern (pattern), or called in-slot PDCCH monitoring symbol, is used to instruct the CORESET associated with the SS set to monitor the start symbol of PDCCH in a time slot.
  • Ts is used to indicate the number of continuous time slots in the SS set.
  • Ts is smaller than Ks, and the value of Ts may be 1 time slot.
  • SS set type indication used to indicate that the SS set is a common search space set (common search space set, CSS set), which can be referred to as CSS, or a user-specific search space set (UE-specific search space set, USS set), which can be referred to as USS for short.
  • the base station will also configure the DCI format (format) monitored at the PDCCH candidate position, for example, it can be DCI format 0_0, DCI format 1_0, DCI format 2_0, DCI format 2_1, DCI format 2_2 , DCI format 2_3, DCI format 2_4, DCI format 2_5 or DCI format 2_6, etc.
  • the base station will also configure the DCI format monitored at the PDCCH candidate position, for example, DCI format 0_0, DCI format 1_0, DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2 , DCI format 3_0, or DCI format 3_1, etc.
  • the UE determines a PDCCH monitoring occasion (monitoring occasion, MO) (or called a PDCCH candidate position) according to the PDCCH monitoring cycle, offset, and PDCCH monitoring pattern in the time slot in the above parameters.
  • a PDCCH monitoring occasion monitoring occasion, MO
  • the UE monitors the PDCCH means that the UE monitors the PDCCH at a PDCCH candidate position.
  • a commonly used method for saving UE power consumption is the C-DRX mechanism.
  • the UE can periodically turn on the receiver to monitor the PDCCH according to the DRX cycle (DRX cycle) configured by the network device, as shown in Figure 3.
  • DRX cycle DRX cycle
  • a DRX cycle includes two time periods: active time and non-active time.
  • the UE monitors the PDCCH at the PDCCH candidate position (or monitoring opportunity) during the active time, and may be in a dormant state during the inactive time without monitoring the PDCCH.
  • the PDCCH that the UE does not monitor includes at least the following RNTI scrambled PDCCH: cell-RNTI (cell-RNTI, C-RNTI), cancellation indication-RNTI (cancellation indication-RNTI, CI-RNTI), configuration scheduling -RNTI (configured scheduling-RNTI, CS-RNTI), interrupt-RNTI (interruption-RNTI, INT-RNT), slot format indication-RNTI (slot format indication-RNTI, SFI-RNTI), semi-persistent-channel state information -RNTI (semi-persistent-channel state information-RNTI, SP-CSI-RNTI), physical uplink control channel transmit power control-RNTI (transmit power control-physical uplink control channel-RNTI, TPC-PUCCH-RNTI), physical uplink Shared channel transmit power control-RNTI (transmit power control-physical uplink
  • the UE does not monitor the PDCCH scrambled by the RNTI.
  • system information-RNTI system information-RNTI, SI-RNTI
  • random access-RNTI random access-RNTI
  • RA-RNTI random access-RNTI
  • message B-RNTI messages B-RNTI
  • MsgB-RNTI temporary cell-
  • the PDCCH scrambled by RNTI temporary cell-RNTI, TC-RNTI
  • the activation time includes at least the duration corresponding to the DRX on-duration timer (drx-onDurationTimer).
  • the base station can configure the length of drx-onDurationTimer (abbreviated as onDurationTimer hereinafter) to the UE through radio resource control (radio resource control, RRC) signaling.
  • RRC radio resource control
  • the base station will configure to the UE a parameter indicating the length of the long DRX cycle (defined as DRX long cycle (drx-LongCycle)), used to determine the subframe of the start of the DRX cycle Parameters (defined as DRX start offset (drx-StartOffset)), and the subframe slot offset at the beginning of the DRX cycle (defined as DRX slot offset (drx-SlotOffset)), for the convenience of description, can be These parameters configured by the base station are called C-DRX parameters.
  • the UE starts onDurationTimer in the time slot corresponding to drx-SlotOffset within the subframe number:
  • SFN is the system frame number
  • modulo means the modulo operation
  • the onDurationTimer is started after the subframe at the beginning of the DRX cycle passes through the time slot offset corresponding to drx-SlotOffset, as shown in Figure 4A.
  • the start time of the activation time is the moment when the onDurationTimer starts counting, and the activation time includes at least the duration corresponding to the onDurationTimer.
  • the activation time may also include DRX inactivity timer (drx-InactivityTimer) (hereinafter referred to as InactivityTimer), DRX downlink retransmission timer (drx-RetransmissionTimerDL) (hereinafter referred to as RetransmissionTimerDL) or DRX uplink retransmission timer (drx-RetransmisionTimerUL) (hereinafter referred to as RetransmisionTimerUL for short) is the running time of at least one waiting timer.
  • the inactive time is the time other than the active time in the DRX cycle.
  • the timers here include onDurationTimer, InactivityTimer, RetransmissionTimerDL, and RetransmissionTimerUL.
  • Table 1 illustrates the trigger timing of each timer.
  • the time position for the UE to periodically turn on the onDurationTimer is also fixed, and the start time of the activation time of each DRX cycle is also fixed. That is, the opening time of onDurationTimer is periodic.
  • the opening time of onDurationTimer is periodic.
  • the base station For data packets that arrive early, the base station needs to wait until the activation time to schedule the UE, which will increase the transmission delay and reduce the user experience; if the data packets arrive at the network after a delay, the UE will monitor the PDCCH for a period of time during the activation time. But actually there is no scheduling of data packets, which will lead to waste of power consumption.
  • the early arrival here as shown in FIG. 4B means that the data packet arrives at the base station before the start time of the activation time (that is, the time when the onDurationTimer is turned on); the delayed arrival means that the data packet arrives at the base station at the start time of the activation time. Then reach the base station.
  • the transmission delay here may refer to the time between when the data packet arrives at the base station and when the base station sends the data packet to the UE.
  • a method to reduce the transmission delay is to configure a longer onDurationTimer or a smaller DRX cycle, so that the activation time can cover the range of data packet jitter, but it will reduce the benefit of the C-DRX mechanism to save UE power consumption.
  • the cycle of XR service and CG service is generally a non-integer number, for example, 16.67ms, 8.33ms, and the length of the C-DRX cycle is generally an integer or the granularity of the time slot length, such as 16ms, 16.5ms, so the period of XR service and CG service is difficult to match with the length of C-DRX period.
  • the arrival time of the data packet of XR service or CG service determined according to the period will also be in time with the onDurationTimer of C-DRX stagger.
  • the current C-DRX mechanism is not well suited for XR and CG services, and it is necessary to provide a new UE power consumption reduction solution for XR and CG services and reduce transmission delay.
  • the embodiment of the present application provides a communication method, which is used to provide a solution for reducing power consumption of UE applicable to XR service and CG service.
  • the method can be implemented by a base station and a UE in a communication system.
  • the base station can be used to receive the data packets processed by the XR service or CG service server, and send the data packets to the UE through the air interface.
  • the communication system may also include a core network device (not shown in FIG.
  • the core network device may include an access and mobility management function (access and mobility management function, AMF) network element, a session management function (session management function, SMF) network element, user plane function (UPF) network element, policy control function (PCF) network element, unified data management (unified data management, UDM) network element, and application function (application function) , AF) network element, etc.
  • AMF access and mobility management function
  • SMF session management function
  • UPF user plane function
  • PCF policy control function
  • UDM unified data management
  • application function application function
  • AF application function network element
  • FIG. 7 and FIG. 8 are schematic structural diagrams of a communication device provided in the embodiment of the present application, and are used to implement the communication method provided in the embodiment of the present application. It should be understood that the communication device may be used to implement actions performed by the base station and/or the UE in the embodiments of the present application.
  • FIG. 7 shows a schematic structural diagram of a possible communication device, and the structure may include a processing module (or processing unit) 710 and a transceiver module (or transceiver unit) 720 .
  • the structure shown in FIG. 7 may be a base station or a UE, or a chip applied in a base station or UE, or other combined devices, components (or components), etc. having functions of the base station or UE shown in this application.
  • the transceiving module 720 may be a transceiver, and the transceiver may include a communication interface, an antenna, or a radio frequency circuit, etc., for supporting the communication device to communicate in a wired and/or wireless manner.
  • the processing module 710 may be a processor, for example, including one or more central processing units (central processing unit, CPU).
  • the transceiver module 720 may be an interface circuit, and the processing module 710 may be a processor.
  • the transceiver module 720 may be an input and output interface of a chip (such as a baseband chip), and the processing module 710 may be a processor of the chip system, and may include one or more central processing units.
  • processing module 710 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component
  • transceiver module 720 may be implemented by a transceiver or a transceiver-related circuit component.
  • the processing module 710 may be used to perform all operations performed by the base station or UE in any embodiment of the present application except the transceiving operation, such as processing operations, and/or other processes for supporting the technology described herein , such as generating messages, information and/or signaling sent by the transceiver module 720, and processing messages, information and/or signaling received by the transceiver module 720.
  • the transceiver module 720 may be used to perform all receiving and sending operations performed by the base station or UE in any embodiment of the present application, and/or to support other processes of the technologies described herein, such as sending and/or receiving data .
  • the transceiver module 720 may be a functional module, and this functional module can complete both sending and receiving operations.
  • the transceiver module 720 can be used to perform all sending and receiving operations performed by the base station or UE, for example, in When performing a sending operation, the transceiver module 720 can be considered as a sending module, and when performing a receiving operation, the transceiver module 720 can be considered as a receiving module; or, the transceiver module 720 can also be two functional modules, and the transceiver module 720 can be regarded as this
  • the two functional modules are the sending module and the receiving module, the sending module is used to complete the sending operation, for example, the sending module can be used to perform all sending operations performed by the base station or the UE, and the receiving module is used for After completing the receiving operation, the receiving module can be used to perform all receiving operations performed by the base station or UE.
  • FIG. 8 shows a schematic structural diagram of another communication device, which is used to perform the actions performed by the base station or UE provided in the embodiment of the present application.
  • a communication device may include a processor and a memory.
  • the processor is mainly used to process communication protocols and communication data, control communication devices, execute software programs, process data of software programs, and the like.
  • Memory is primarily used to store software programs and data.
  • the communication interface is mainly used for communication between the base station and the UE.
  • the communication device above may further include an antenna and a radio frequency circuit for communicating through wireless communication.
  • the base station may send downlink data through the antenna and the radio frequency circuit
  • the UE may receive downlink data through the antenna and the radio frequency circuit.
  • the processor of the communication device can also perform baseband processing on the data to be sent, and output the baseband signal to the radio frequency circuit. form to send out.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and Do something with that data.
  • the antenna and/or radio frequency circuit having a transceiver function may be regarded as a transceiver unit of the communication device.
  • the transceiver unit may also include a communication interface and the like.
  • the transceiver unit may be a functional unit capable of transmitting and receiving functions; or, the transceiver unit may also include two functional units, namely a receiving unit capable of receiving and a transmitting unit capable of transmitting.
  • a processor having processing functions may also be considered as a processing unit of a communication device.
  • the communication device may include a transceiver unit 810 and a processing unit 820 .
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like.
  • a processing unit may also be called a processor, a processing board, a processing module, a processing device, and the like.
  • the device in the transceiver unit 810 for realizing the receiving function may be regarded as a receiving unit
  • the device in the transceiver unit 810 for realizing the sending function may be regarded as a sending unit, that is, the transceiver unit 810 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes also be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit, etc.
  • the sending unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the transceiver unit 810 may correspond to the transceiver module 720 , or in other words, the transceiver module 720 may be implemented by the transceiver unit 810 .
  • the transceiver unit 810 is configured to perform the transmitting operation and receiving operation of the base station and/or UE in the embodiments shown in this application, and/or other processes for supporting the technologies described herein.
  • the processing unit 820 may correspond to the processing module 710 , or in other words, the processing module 710 may be implemented by the processing unit 820 .
  • the processing unit 820 is configured to perform other operations of the base station and/or UE in the embodiment shown in this application except for the transceiving operation, for example, to perform operations other than receiving and sending performed by the base station and/or UE in the embodiment shown in this application. All other operations, and/or other processes used to support the techniques described herein.
  • FIG. 8 For ease of illustration, only one memory and processor are shown in FIG. 8 .
  • processors there may be one or more processors and one or more memories.
  • a memory may also be called a storage medium or a storage device.
  • the memory may be configured independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the communication method may include the following steps:
  • the UE determines location information of a first time window.
  • the location information of the first time window may be used to determine the time location of the first time window.
  • the base station may also determine the location information of the first time window.
  • the first time window may be a time window agreed between the base station and the UE, the base station may send the first information within the first time window, and the UE may monitor the first information within the first time window.
  • the first information in this application is used to determine that there is data to be transmitted to the UE, and it can also be described as used to determine that a data packet arrives at the base station, and the base station will schedule the UE, or directly described as used to instruct the UE to start monitoring the PDCCH, then The UE may start monitoring the PDCCH based on the first information.
  • the information used to determine that there is data to be transmitted to the UE may also be described as information used to determine that the base station will schedule the UE, or may be described as information used to instruct the UE to start monitoring the PDCCH.
  • the information used to determine that there is data to be transmitted to the UE may also be called activation information, that is, the information may be used to trigger the UE to monitor the PDCCH, or to determine that the base station will schedule the UE.
  • the information for determining that there is data to be transmitted to the UE includes but not limited to the first information and the second information in this application.
  • the first information may be DCI carried by the PDCCH, or the first information may be a signal generated through a sequence, for example, the first information is a reference signal or a synchronization signal sent at a specific time-frequency domain position.
  • the reference signal is, for example, a channel state information-reference signal (channel state information-reference signal, CSI-RS). It should be understood that monitoring in this application can also be replaced by detection.
  • the first information is carried on the PDCCH, it can be said that the UE monitors the first information.
  • the first information is a signal generated by a sequence, it can be called that the UE detects the first information. a message.
  • the first time window can be understood as a time window in a plurality of time windows periodically distributed in the time domain, or the position of the first time window can be passed through DCI, MAC control element (MAC control element, MAC CE) Or a dynamic indication of the activation information before the first time window.
  • the multiple time windows can be used to monitor activation information.
  • the setting manner of the location information of the first time window is described by way of example.
  • the base station sends the location information of the first time window to the UE.
  • the base station may send first configuration information to the UE, where the first configuration information carries location information of the first time window.
  • the position information of the first time window here may include the cycle of the above-mentioned periodically distributed time window, the offset of the first time window in one cycle, the starting position of the first time window and the length of the first time window at least one of the .
  • the UE may determine the position of the first time window according to the first configuration information.
  • the offset of the first time window in one period is offset, and the offset may be 0.
  • the starting position of the first time window in a cycle is determined as the time slot in the radio frame n f by the following formula
  • a radio frame may also be called a system frame, and a radio frame is 10 ms, and a radio frame may be composed of multiple subframes, and each subframe is composed of multiple time slots.
  • the position information of the first time window may also include a start symbol position of the first time window.
  • drx-LongCycle or drx-ShortCycle can be used as the cycle of the periodically distributed time window configured by the first configuration information above, and drx-SlotOffset is used as the offset of the first time window in one cycle, then the first time The starting position of the window is, when the subframe number (subframe number) satisfies the following formula, the time slot corresponding to the offset drx-SlotOffset within the subframe number:
  • the starting position of the first time window is, when the subframe number satisfies the following formula, the subframe number is offset from the time slot corresponding to drx-SlotOffset:
  • the starting position of the first time window is the starting time of onDurationTimer determined by the C-DRX parameter.
  • the length of the first time window may be equal to the length of onDurationTimer.
  • the above first configuration information may be carried in RRC signaling, so the base station may configure the location information of the first time window to the UE through RRC signaling.
  • the RRC signaling may carry at least one of the period of the periodically distributed time window, the offset offset, the start position of the time window, or the length of the time window, and the UE may determine multiple time intervals of the periodic distribution according to the RRC signaling. window.
  • the UE may use each time window as the first time window, and thus may monitor the first information in each time window.
  • the first configuration information may be notified to the UE through the PDCCH or PDSCH before the first time window.
  • the base station may send activation information to the UE in one of the periodically distributed time windows (the time window starts before the first time window), and the activation information may be used to trigger the UE to monitor the PDCCH.
  • the UE starts to monitor the PDCCH according to the activation information.
  • the PDCCH includes at least a PDCCH for scheduling data, and receives data through the PDSCH according to the scheduling information carried by the monitored PDCCH, and is used to monitor the position information of the first time window of the first information It can be carried in the above-mentioned PDCCH or PDSCH.
  • the UE can monitor multiple PDCCHs for scheduling data and receive data through multiple PDSCHs. Therefore, the location information of the first time window can carry In at least one PDCCH among the above-mentioned multiple PDCCHs or at least one PDSCH among the above-mentioned multiple PDSCHs.
  • the UE can also monitor other types of PDCCHs, such as the PDCCH carrying group common DCI, and the position information of the first time window can also be carried in the group common DCI.
  • the first The location information of the time window may also be carried in the activation information.
  • the above-mentioned PDCCH used for scheduling data may also be used for scheduling PUSCH.
  • the position information of the first time window may be carried in the DCI, MAC CE or the activation information before the first time window, and is used to indicate the position of the first time window relative to the previous time window for UE to monitor the activation information Offset.
  • the position information of the first time window carried in the DCI may indicate the position of the first time window relative to the previous most recent time window for the UE to monitor the activation information (that is, the last time window for the UE to monitor the activation information) Offset.
  • the position information of the first time window may indicate a position offset of the first time window relative to the periodically distributed time windows.
  • the position information of the first time window carried by the DCI may include at least one of a start position of the first time window and a length of the first time window.
  • a possible implementation includes, at the MAC layer, the base station carrying the location information of the first time window in the MAC CE, and The MAC CE is transmitted to the physical layer, and the base station sends the MAC CE to the UE through the PDSCH on the physical layer.
  • the UE receives the PDSCH, and parses out the location information of the first time window carried in the MAC CE.
  • the base station and/or the UE determine the location information of the first time window according to the first parameter, where the first parameter includes the frame rate of the first data and/or the time domain jitter range of the first data.
  • the frame rate and time-domain jitter range of data packets in this application may be related to the service to which the data packet belongs, that is, for a specific service, the frame rate and time-domain jitter range of different data packets may be the same.
  • the base station and/or the UE may first determine the frame rate and/or the time domain jitter range.
  • the base station and/or UE can round up or down the cycle to determine 16ms or 17ms is the period of the periodically distributed time window.
  • the period of the periodically distributed time window is determined with the time slot length as the granularity and the period of the data packet. Taking the time slot length as 0.5 ms as an example, the period of the periodically distributed time window may be 16.5 ms or 17 ms.
  • the base station and/or UE may determine the starting position of the first time window according to Formula 1 in Mode 1, and at this time, it may be considered that the offset is 0.
  • the window length of the first time window is determined to be (P+Q)ms.
  • the base station and/or the UE may respectively determine the position information of the first time window according to the frame rate of the data packet and/or the jitter range in the time domain.
  • the base station and the UE determine the window length of the first time window, or the start position and end position of the first time window according to the first parameter.
  • the base station and the UE determine the period of the first time window according to the first parameter, and the base station configures the window length of the first time window to the UE.
  • the UE may determine the location information of the first time window according to the method 2.
  • the base station and the UE may also determine the location information of the first time window through pre-configuration, protocol definition or other negotiation modes between the base station and the UE.
  • the first time window determined according to the cycle in the above method 1 or the first time window determined according to the method 2 may be regarded as a default time window for monitoring the first information.
  • the default time window may appear periodically.
  • the UE may send request information (which may be referred to as third information in this application) to the base station for requesting the location information of the first time window.
  • the third information can be used to request the location information of the first time window, or to request the first time window relative to a previous time window (the time window refers to the time window used to monitor the activation information, for example, the first time window
  • the position offset of the previous time window used to listen to activation information) of a time window, or, used to request the position offset of the first time window relative to the periodically distributed time window, or, can be used to request to obtain first parameter.
  • the third information may also be used to indicate the location information of the first time window suggested by the UE and/or the suggested location offset.
  • the third information may be sent to the base station through RRC signaling, for example, the RRC signaling may be UE assistance information.
  • S102 The base station sends first information within a first time window.
  • the first information may be downlink control information (downlink control information, DCI) carried by the PDCCH, that is, the first information may be carried on the PDCCH.
  • DCI downlink control information
  • the first information is generated through a sequence, which may be a pseudo-random sequence, a ZC (Zadoff-Chu) sequence, or the like.
  • a reference signal or a synchronization signal may be used as the first information, and the reference signal or the synchronization signal may be referred to as a first signal.
  • the CSI-RS may be generated through a pseudo-random sequence.
  • the sequence generation formula of CSI-RS can satisfy:
  • c(i) represents the pseudo-random sequence used to generate the sequence
  • the initial value c init of c(i) can satisfy:
  • n ID can be configured through RRC parameters, indicating the identity of the cell or the identity of the UE.
  • the pseudo-random sequence is a non-orthogonal sequence, and the sequence r(d) generated by the pseudo-random sequence is also a non-orthogonal sequence.
  • the first signal is generated in a ZC sequence.
  • the ZC root sequence generation formula can satisfy:
  • r(n) represents the ZC sequence
  • n 0, 1, 2... ⁇ N-1
  • N is the signal transmission width, in resource block (resource block, RB) as the unit
  • ⁇ is the signal transmission density, representing each How many REs are there in the RB
  • q represents the rooting of the ZC root sequence, 1 ⁇ q ⁇ N ZC .
  • m nmodN ZC
  • m 0, 1, 2...N ZC -1
  • mod represents the remainder.
  • the ZC root sequence can be used as the ZC sequence, and the ZC sequence can also be generated according to the ZC root sequence and cyclic shift information. Then generate the first signal according to the ZC sequence.
  • the base station after obtaining the data packet to be sent to the UE from the server of the XR service or the CG service, the base station sends the first information to the UE within the first time window, so as to trigger the UE to monitor the PDCCH.
  • S103 The UE monitors first information within a first time window.
  • the UE monitors the first information in a low power consumption state within the first time window.
  • the low power consumption mode for example, in the first time window, the UE may only monitor the first information.
  • the first information is the DCI carried by the PDCCH
  • the UE monitors the PDCCH used to carry the first information within the first time window, and does not need to monitor the PDCCH carrying other functions within the first time window, for example, does not monitor the C-RNTI , CS-RNTI, MCS-RNTI and other RNTI scrambled PDCCHs to reduce PDCCH blind detection.
  • the power consumption is lower.
  • the UE only needs to perform sequence detection at the time-frequency domain position of the first information, and the UE also does not need to monitor the PDCCH, and the base station is determined to schedule the UE through the sequence detection result. Because the complexity of the sequence detection is low, the effect of low power consumption is also achieved.
  • the reference signal generated by the sequence is used as the activation signal, which not only saves power consumption required for detecting the activation signal, but also can be used for functions such as time-frequency synchronization and beam measurement.
  • the present application does not limit the execution order of S102 and S103.
  • the UE in S103, the UE can monitor the first information from the start time of the first time window, and in S102, the base station can send the first information at any time in the first time window, so S102 may actually be in S103 Execute afterwards.
  • the base station sends a first PDCCH at a first PDCCH candidate position, where the first PDCCH can be used to schedule first data.
  • the first PDCCH candidate position may be a PDCCH candidate position at least N symbols after the base station sends the first information (or the symbol or time slot occupied by the first information), where N is a non-negative number.
  • the base station also sends the first data scheduled by the first PDCCH to the UE. That is, after the base station sends the first information, it can send the PDCCH to the UE after at least N symbols.
  • the first PDCCH candidate position may be located within a certain period of time, so as to reduce UE blind detection and save UE power consumption.
  • the first PDCCH may be a PDCCH scrambled by C-RNTI, modulation and coding scheme-cell-RNTI (modulation and coding scheme-C-RNTI, MCS-C-RNTI) or CS-RNTI. It should be understood that, after the base station sends the first information, in addition to sending the first PDCCH for scheduling the first data, the base station may also send a PDCCH with other functions, which is not specifically limited in this application.
  • the first PDCCH candidate position here may be some PDCCH candidate positions among multiple PDCCH candidate positions, that is, the PDCCH candidate positions at least N symbols after the base station sends the first information.
  • each block represents a PDCCH candidate position, and the base station can send the PDCCH at the PDCCH candidate positions after the first information.
  • the base station may also send value information (which may be referred to as first time information in this application) for indicating the value of N to the UE, or, the value of N may be pre-configured, defined by a protocol, or communicated between the UE and the base station.
  • the signaling negotiation is determined. For example, when the base station sends the first time information to the UE, the first time information may be carried in the first information.
  • the base station starts a timer at or after the Nth symbol after sending the first information within the first time window, for example, the base station starts the timer at the Nth symbol after sending the first information, Or start a timer after the N+1th symbol after sending the first message, or start the timer at the beginning of the first time slot after the Nth symbol after sending the first message, or start the timer at The timer is started at the starting position of the first time slot after the N+1th symbol after sending the first information.
  • the base station can send the PDCCH through the PDCCH candidate position. That is to say, the base station can trigger the timer to run through the first information.
  • the first PDCCH can also be used to schedule the PUSCH, and the base station will also receive the PUSCH sent by the UE.
  • S105 After the UE monitors the first information within the first time window, monitors the first PDCCH at the first PDCCH candidate position.
  • the UE may receive the PDSCH carrying the first data according to the scheduling information carried on the first PDCCH.
  • the UE may start a timer, and monitor the first PDCCH during the timing period of the timer.
  • the duration of the timer can be understood as a time period, that is, the UE can monitor the first PDCCH at a PDCCH candidate position within a time period.
  • the UE may start timing of the timer after an interval of N symbols.
  • the UE may stop monitoring the PDCCH to reduce power consumption.
  • the base station can configure the duration of the timer or the length of the time period for monitoring the PDCCH to the UE.
  • the solution of monitoring the first information according to the first time window shown in this embodiment can be used as an enhanced solution of the existing C-DRX mechanism, or can be used as an independent solution.
  • the base station needs to configure C-DRX parameters to the UE before step S104, the onDurationTimer or drx-InactivityTimer in the C-DRX mechanism or other timers in the C-DRX mechanism can be used as the timer. For example, if onDurationTimer is used as the timer, then onDurationTimer can no longer be used as the first time window, and the first time window can be determined according to other methods of mode 1 and mode 2 in S101.
  • the onDurationTimer is started according to the arrival time of the video frame of the XR service or the CG service.
  • the onDurationTimer can only be started at a fixed time position, which lacks flexibility.
  • drx-InactivityTimer is used as the timer.
  • the UE has not detected the first information, and the onDurationTimer does not monitor the PDCCH or does not enable onDurationTimer. Once the first information is detected, the drx-InactivityTimer is enabled according to the above method , and in the existing C-DRX mechanism, the onDurationTimer always needs to monitor the PDCCH.
  • step S101 the onDurationTimer is used as the first time window, and the drx-InactivityTimer is used as the timer for monitoring the first PDCCH.
  • the UE monitors the activation information within the onDurationTimer without monitoring the first PDCCH.
  • the UE starts drx-InactivityTimer and monitors the first PDCCH.
  • the timer may be a newly defined timer, and the timer may be defined as an activation time.
  • using onDurationTimer as the first time window means that the starting position of onDurationTimer is used as the starting position of the first time window, and the length of onDurationTimer is used as the length of the first time window.
  • Not using onDurationTimer as the first time window means that the starting position of onDurationTimer is not used as the starting position of the first time window.
  • Using the drx-InactivityTimer as the timer for monitoring the first PDCCH refers to using the length of the drx-InactivityTimer as the length of the timer for monitoring the first PDCCH.
  • the present invention does not limit the time unit of N, and the unit of N may be symbols, time slots, or milliseconds, or a combination of time units including symbols, time slots, or milliseconds.
  • the N symbols may also be replaced by a time domain offset value, that is, the first PDCCH candidate position is a PDCCH candidate position separated by at least one time domain offset value after the first information is sent.
  • the UE may start the timing of the timer after the duration of the time domain offset value, and monitor the PDCCH at the PDCCH candidate position during the running of the timer.
  • the first time information may be used to indicate the time domain offset value to the UE, or the time domain offset value may be determined through pre-configuration, protocol definition, or signaling negotiation between the UE and the base station.
  • the time domain offset value is less than or equal to the duration corresponding to one time slot.
  • the UE may start to monitor the first PDCCH after the end symbol or time slot of the first time window.
  • the first PDCCH is monitored in the third time window after the end symbol or time slot. This is because, based on the quasi-periodic characteristics of the XR service and the CG service, within the time position where the data packet is scheduled to arrive and within the range of time domain jitter, the base station has a high probability of sending data to the UE, so the base station has a high probability of sending data in the first time window.
  • the UE does not hear the first information within the first time window, it means that the UE may have missed the detection of the first information.
  • the UE can The PDCCH is monitored after the end symbol or time slot of the first time window.
  • the onDurationTimer, drx-InactivityTimer or other timers in the C-DRX mechanism can be used as the third time window, and the third time window can also be the timing period of the newly defined timer.
  • the UE may start the timer after a duration of M symbols after the end symbol or time slot of the first time window, and during the running of the timer, the UE monitors the PDCCH. When the timer expires, the UE may stop monitoring the PDCCH to reduce power consumption.
  • the base station can configure the duration of the timer to the UE.
  • the unit of M may also be replaced by time slot or millisecond, etc., or a combination of time units including symbol, time slot or millisecond.
  • the M symbols here can also be replaced by time domain offset values.
  • M and N may or may not be equal.
  • the manner of determining M may refer to the manner of determining N, which will not be repeated here.
  • the present application does not limit the execution order of S104 and S105.
  • the UE may monitor the first PDCCH from the first PDCCH candidate position among the first PDCCH candidate positions, and in S104, the base station may transmit the first PDCCH at any one of the first PDCCH candidate positions. A PDCCH, therefore S104 may actually be performed after S105.
  • the UE will send the PUSCH to the base station.
  • S106 The UE determines location information of the second time window.
  • the location information of the second time window may be carried in the first PDCCH, the PDSCH carrying the first data, or the first information. It should be understood that the present application does not limit the execution sequence of S106. For example, after receiving the first information, the UE obtains the location information of the second time window from the first information, then S106 may be located after S103, and located at S104 and/or Before S105. For another example, after receiving the first PDCCH, the UE obtains the location information of the second time window from the first PDCCH, then S106 may be located after S105. For another example, after receiving the PDSCH carrying the first data, the UE acquires the location information of the second time window from the PDSCH, then S106 may be located after S105.
  • the base station may also determine the location information of the second time window.
  • the base station may determine the location information of the second time window through configuration information.
  • the position information of the second time window may include at least one of the cycle of the periodically distributed time window, the offset of the second time window in one cycle, the starting position of the second time window and the length of the second time window One.
  • the base station may determine the location information of the second time window according to the second parameter, where the second parameter includes a frame rate of the second data and/or a time domain jitter range of the second data.
  • the second time window is used for the base station to send the second information, or in other words, the second time window is used for the UE to receive the second information.
  • the second information is used to determine that there is second data to be transmitted to the UE. That is to say, the second information is used to trigger the UE to monitor the PDCCH.
  • the expression of the second information may refer to the expression of the first information in S101.
  • the second data here is XR service or CG service data.
  • the first data and the second data are data packets arriving at the base station at different times, which can be understood as two video frames of the XR service or two video frames of the CG service.
  • the base station may send first information to the UE within the first time window, and the UE starts to monitor the first PDCCH according to the first information, and the first The PDCCH includes at least the PDCCH used to schedule data.
  • the first data can be received through the first PDSCH, and the location information of the second time window can be carried on the first PDCCH or the first PDSCH. middle. Since a data packet can be divided into multiple TBs, after the UE detects the first information, the UE can monitor multiple first PDCCHs and multiple PDSCHs.
  • the position information of the second time window can be carried in multiple first PDCCHs. In at least one PDCCH in the PDCCH or at least one PDSCH in the plurality of first PDSCHs.
  • the UE can also monitor other types of PDCCHs, such as the PDCCH carrying group common DCI, and the location information of the second time window can also be carried in the group common DCI.
  • the location information of the second time window may also be carried in the first information, that is, the base station may indicate the location information of the second time window through the first information in the first time window.
  • the position information of the second time window may indicate a position offset of the second time window relative to the first time window, or an offset relative to periodically distributed time windows.
  • the position information carried on the first PDCCH, the PDSCH carrying the first data, or the second time window of the first information may also include at least one of the start position of the second time window and the length of the second time window.
  • the location information of the second time window may include: at the MAC layer, the base station carries the location information of the second time window in the MAC CE, and the MAC The CE is transmitted to the physical layer, and the base station sends the MAC CE to the UE through the first PDSCH on the physical layer.
  • the UE receives the first PDSCH, and parses out the location information of the second time window carried in the MAC CE.
  • the UE may monitor the second information from the start time of the second time window, and the base station may send the second information at any time in the second time window.
  • the base station may not indicate the position information of the second time window in the first PDCCH, the PDSCH carrying the first data, and the first information, that is, the base station does not pass the first PDCCH, the PDSCH carrying the first data, and the first information Adjust the time window for the UE to monitor the activation information, or the base station indicates the location information of the second time window in the first PDCCH, the PDSCH carrying the first data, or the first information, but the UE is on the first PDCCH, the PDSCH carrying the first data If the location information of the second time window is not detected in the PDSCH and the first information, the UE may determine the location information of the second time window according to the third configuration information.
  • the third configuration information may be set with reference to the first configuration information.
  • the third configuration information may be carried in the RRC signaling and used to configure a periodical time window for monitoring activation information.
  • the first configuration information and the third configuration information are the same configuration information (for example, configuration information carried in RRC signaling), and this configuration information can be used to determine multiple time windows distributed periodically, so it can be considered that according to The RRC signaling determines the next time window after the first time window in the periodically distributed time windows as the second time window.
  • the base station and/or the UE determine the location information of the second time window according to the frame rate of the second data and/or the jitter range in the time domain.
  • the base station may not indicate the position information of the second time window in the first PDCCH, the PDSCH carrying the first data, and the first information, that is, the base station does not adjust the UE through the first PDCCH, the PDSCH carrying the first data, and the first information.
  • the time window for monitoring the activation information, or the base station indicates the position information of the second time window in the first PDCCH, the PDSCH carrying the first data and/or the first information, but the UE is in the first PDCCH, the PDSCH carrying the first data
  • the UE may determine the location information of the second time window according to the time domain location of the first information, the frame rate of the second data, and the time domain jitter range, for example , assuming that the time domain position of the first information is t0, the frame rate is A, and the time domain jitter range is [-P, Q]ms, then the range of the second time window is t0+1/A shifted forward by P ms, The range between Q ms is shifted backward; or, the position information of the second time window can be determined according to the frame rate of the second data and the time-domain jitter range, and the method of determining the first time window in mode 2 can
  • the frame rate of the second data is the same as the frame rate of the first data
  • the time domain jitter range of the second data is the same as the time domain jitter range of the first data Can be the same.
  • the base station and/or the UE may also determine the location information of the second time window according to the location of the first time window or the location of the timer monitoring the first PDCCH in steps S104 and S105.
  • the starting position of the second time window is offset by a time length from the starting position of the first time window, or the starting position of the timer in steps S104 and S105 is offset by a time length, and the time length can be It is equal to or approximately equal to the reciprocal of the second data frame rate.
  • the base station may further send the second PDCCH and the PDSCH carrying the second data
  • the UE may monitor the second PDCCH and receive the PDSCH carrying the second data after monitoring the second information.
  • the method of monitoring the second PDCCH and receiving the PDSCH carrying the second data can refer to the description of the UE monitoring the first PDCCH and receiving the PDSCH carrying the first data in S104 and S105, for example, the UE monitors the second PDCCH at the candidate position of the second PDCCH
  • the monitoring range of the second PDCCH can be determined with reference to the monitoring range of the first PDCCH.
  • the signal type of the second information is the same as that of the first information, that is, the second information may be DCI carried by the PDCCH, or the second information may be a signal generated through a sequence, such as a reference signal.
  • the second PDCCH may also be used to schedule the PUSCH or to carry non-scheduled DCI with other functions.
  • the UE sends the PUSCH to the base station.
  • the base station may also use the second information, the second PDCCH or the PDSCH carrying the second data to carry the location information of the next time window for monitoring the activation information.
  • the UE may send request information (which may be referred to as fourth information in this application) to the base station, for requesting location information of the second time window.
  • the fourth information may also be used to indicate the location information of the second time window suggested by the UE and/or the suggested location offset. For details, refer to the description of the third information.
  • the receiving and sending actions of the base station can be realized by the transceiver module 720 and/or the transceiver unit 810, and the receiving and sending actions of the UE can be realized by the transceiver module 720 and/or the transceiver unit 810.
  • the sending action of the base station can be implemented by the transceiver module 720 and/or the transceiver unit 810
  • the receiving action of the UE can be implemented by the transceiver module 720 and/or the transceiver unit 810 .
  • the UE may determine the position of the second time window according to the first information from the base station, the PDSCH carrying the first data, or the first PDCCH, and monitor the second information according to the second time window, wherein the first The first information and the second information have the same function, and both are used to trigger the UE to start monitoring the PDCCH, just to distinguish between sending and receiving in different time windows. Therefore, for the quasi-periodicity and time-domain jitter of XR business and CG business, it is possible to indicate the monitoring time window of the activation information corresponding to the next data packet through DCI, MAC CE or previous activation information, and to correspond to the next data packet through the next data packet.
  • the activation information dynamically triggers the UE to monitor the PDCCH, and provides a method for reducing UE power consumption applicable to XR and CG services, which can minimize the impact on service transmission delay while reducing UE power consumption.
  • the UE may refer to FIG. 12 for the process of monitoring the activation information and monitoring the PDCCH.
  • the UE may monitor the first information with lower power consumption within the first time window.
  • the UE monitors the first PDCCH at the first PDCCH candidate position, and receives the PDSCH carrying the first data according to the first PDCCH, wherein, for the determination method of the first PDCCH candidate position, refer to the above-mentioned method embodiment part illustrate.
  • the base station indicates the location information of the second time window through the first PDCCH, and the UE may also monitor the second information within the second time window with lower power consumption.
  • the second PDCCH is monitored at the second PDCCH candidate position, and the second data is received according to the second PDCCH.
  • the method of determining the second PDCCH candidate position refer to the description of the foregoing method embodiments.
  • the UE may also start a timer, and the UE monitors the PDCCH within the timing range of the timer.
  • the UE when the UE detects the first information at a certain moment within the first time window, the UE may stop listening to the first information during the remaining time of the first time window.
  • the second time window is the same as the second information.
  • the UE may also receive second configuration information from the base station, where the second configuration information may be used to configure at least time-frequency resources of the first information.
  • the second configuration information can include the configuration information of the SS set.
  • the configuration information of the SS set can be used to configure the time-frequency resources and the DCI format of the first information.
  • the UE can configure the SS set according to the configuration information of the SS set The information monitors the first information within the first time window.
  • the base station in order to reduce the power consumption of the UE monitoring the first information, can indicate a small bandwidth (such as a smaller frequency domain resource) to the UE through the second configuration information, so the UE can monitor the first information on a smaller bandwidth, Compared with monitoring with a large bandwidth, the power consumption of the UE can be further saved.
  • the base station limits the size of the CORESET used to monitor the first information.
  • the base station may also indicate to the UE the DCI format used to carry the first information through the second configuration information, and the UE may only monitor the DCI format within the first time window; or, only monitor the PDCCH scrambled by a specific RNTI, Therefore, the number of times of blind detection of the PDCCH by the UE is reduced, and the power consumption of the UE is reduced.
  • the base station may use the second configuration information to instruct the UE to monitor the maximum number of PDCCH blind detection times in the first time window, so as to reduce the number of PDCCH blind detection times.
  • the present invention does not limit the method for reducing the number of PDCCH blind detection times.
  • the second configuration information may indicate the time-frequency resource of the first information, for example, symbol position, bandwidth, density or frequency domain position bearing the first information.
  • the second configuration information may multiplex a CSI-RS resource set (resource set) and resource configuration.
  • the UE may also receive fourth configuration information from the base station, where the fourth configuration information may at least be used to configure the time-frequency resource of the second information.
  • the fourth configuration information may also be used to configure the number of times of blind detection and/or DCI format of the second information.
  • the implementation of the fourth configuration information can refer to the description of the second configuration information.
  • the fourth configuration information can include the configuration information of the SS set.
  • the fourth configuration information may include information for indicating the time-frequency resource of the second information.
  • the second configuration information and the fourth configuration information are the same configuration information (eg, configuration information carried in RRC signaling).
  • an embodiment of the present application further provides a communication device, which is used to realize the above functions realized by the terminal device and/or the network device.
  • the device may include the structure shown in FIG. 7 and/or FIG. 8 .
  • the processing module 710 is configured to determine the location information of the first time window.
  • the transceiver module 720 is configured to monitor first information within the first time window, and monitor a first PDCCH at a first PDCCH candidate position, where the first PDCCH candidate position is the first PDCCH candidate position monitored by the terminal device.
  • PDCCH candidate positions after at least the Nth symbol after the first information the first information is used to determine that there is first data to be transmitted to the terminal device, and the first PDCCH is used to schedule the first data, N is a non-negative number.
  • the processing module 710 is further configured to determine location information of a second time window, where the location information of the second time window is carried on the first PDCCH, the PDSCH carrying the first data, or the first information,
  • the second time window is used for the terminal device to receive second information, and the second information is used for determining that there is second data to be transmitted to the terminal device.
  • the transceiver module 720 is further configured to: if the terminal device does not hear the first information within the first time window, at the end symbol or time of the first time window monitor the first PDCCH in a third time window after the slot.
  • the transceiver module 720 is also used for:
  • the transceiver module 720 is also used for:
  • position information of the first time window where the position information of the first time window includes the cycle of the first time window, the offset of the first time window in one cycle, the first time window at least one of the starting position and the length of the first time window.
  • the transceiver module 720 is also used for:
  • the transceiver module 720 is also used for:
  • processing module 710 is specifically configured to:
  • the first parameter includes a frame rate of the first data and/or a time domain jitter range of the first data.
  • processing module 710 is also configured to:
  • the terminal device does not detect the position information of the second time window in the first PDCCH, the PDSCH carrying the first data, and the first information, the time window carried in the RRC signaling as the location information of the second time window; or, if the terminal device does not detect the second time window in the first PDCCH, the PDSCH carrying the first data, and the first information
  • the position information of the time window determine the position information of the second time window according to the frame rate of the second data.
  • the actions performed by the processing module 710 in the above example may be performed by the processing unit 820 shown in FIG. 8 , and details are not repeated here.
  • the above actions of the first communication device performed by the transceiving module 720 may be performed by the transceiving unit 810 shown in FIG. 8 .
  • the processing module 710 is configured to determine the location information of the first time window.
  • the transceiving module 720 is configured to send the first information within the first time window, and send the first PDCCH at the first PDCCH candidate position, and the first PDCCH candidate position is for the network device to send the first information
  • the PDCCH candidate position after at least the Nth symbol, the first information is used to determine that there is first data to be transmitted to the terminal device, the first PDCCH is used to schedule the first data, and N is not negative number.
  • the first PDCCH, the PDSCH carrying the first data, or the first information is also used to carry position information of a second time window, and the second time window is used for the network device to send the second information , the second information is used to determine that there is second data to be transmitted to the terminal device.
  • the transceiver module 720 is also used for:
  • the transceiver module 720 is also used for:
  • the position information of the first time window includes the cycle of the first time window, the offset of the first time window in one cycle, the At least one of the starting position of the first time window and the length of the first time window.
  • the transceiver module 720 is also used for:
  • the transceiver module 720 is also used for:
  • processing module 710 is specifically configured to:
  • the first parameter includes a frame rate of the first data and/or a time domain jitter range of the first data.
  • processing module 710 can also be used for:
  • the actions performed by the processing module 710 in the above example may be performed by the processing unit 820 shown in FIG. 8 , which will not be repeated here.
  • the above actions of the second communication device performed by the transceiving module 720 may be performed by the transceiving unit 810 shown in FIG. 8 .
  • the communication system may include the first terminal device and/or the second terminal device involved in the above embodiments.
  • the communication system may include any structure shown in FIG. 1 to FIG. 2 .
  • the communication device may be used to implement the steps implemented by the first terminal device and/or the second terminal device in the communication method shown in FIG. 8 .
  • the embodiment of the present application also provides a computer-readable storage medium.
  • the computer-readable storage medium is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 8 provided by the above-mentioned method embodiment. Processes related to the first terminal device and/or the second terminal device.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the first terminal in the embodiment shown in FIG. 8 provided in the above method embodiment. device and/or the process related to the second terminal device.
  • the embodiment of the present application also provides a chip or a chip system (or circuit), the chip may include a processor, and the processor may be used to call programs or instructions in the memory to execute the implementation shown in Figure 8 provided by the above method embodiment In the example, the process related to the first terminal device and/or the second terminal device.
  • the system-on-a-chip may include the chip, and other components such as a memory or a transceiver.
  • the communication device in the foregoing embodiments may be a terminal device, or may be a chip applied in the terminal device, or other combined devices, components, etc. that can realize the functions of the above-mentioned terminal device.
  • the transceiver unit may be a transmitter and a receiver, or an integrated transceiver, which may include an antenna and a radio frequency circuit, etc.
  • the processing unit may be a processor, such as a baseband chip.
  • the transceiver unit may be a radio frequency unit
  • the processing unit may be a processor.
  • the transceiver unit may be an input-output interface of the system-on-a-chip
  • the processing unit may be a processor of the system-on-a-chip, such as a central processing unit (CPU).
  • CPU central processing unit
  • the processor in the embodiment of the present application may be a CPU, or other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), Field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC can be located in the first terminal and/or in the second terminal.
  • the processor and the storage medium may also exist in the network device or the terminal device as discrete components.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; and it may also be a semiconductor medium, such as a solid state disk.
  • At least one item (unit) of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c Can be single or multiple.

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Abstract

本申请提供一种通信方法及装置，该方法包括终端装置确定第一时间窗的位置信息，并在第一时间窗内监听第一信息，在监听到所述第一信息之后的第一PDCCH候选位置监听第一PDCCH，第一信息用于确定有第一数据待传输给终端装置，第一PDCCH用于调度第一数据，N为非负数。终端装置确定第二时间窗的位置信息，第二时间窗的位置信息承载于第一PDCCH、承载第一数据的PDSCH或第一信息，第二时间窗用于终端装置接收第二信息，第二信息用于确定有第二数据待传输给终端装置。能够在降低UE功耗的同时尽量减少对业务的传输时延的影响。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2021年07月09日提交中国专利局、申请号为202110778718.3、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及移动通信技术领域，尤其涉及一种通信方法及装置。
背景技术
扩展现实(extended reality，XR)和云游戏(cloud gaming，CG)是5G的重要应用场景。XR是不同类型的现实(reality)的总称，指通过计算机或者穿戴设备产生的现实和虚拟结合的环境以及人机交互，XR的类型包括增强现实(augmented reality，AR)、混合现实(mixed reality，MR)，虚拟现实(virtual reality，VR)等。
XR业务和CG业务的特点之一，是视频帧(video frame)(或者称为画面帧(scene frame)，或者称为切片(slice))到达基站的时间存在一定范围内的时域抖动，即在周期性到达的基础上，视频帧有可能会提前到达基站，也可能会推迟到达基站，相应地，基站在通过空口向用户设备(user equipment，UE)发送XR业务和CG业务的视频帧时存在时域抖动，因此，在基站与UE之间，XR业务和CG业务的视频帧不是严格按照周期进行传输的。
连接态不连续接收(connected mode-discontinuous reception，C-DRX)是目前的一种在连接态下用于降低UE功耗的方案。在C-DRX机制中，UE在激活时间根据物理下行控制信道(physical downlink control channel，PDCCH)的候选位置正常的监听PDCCH，而在非激活时间则停止监听用于某些功能的PDCCH，停止监听的PDCCH包括用于调度数据的PDCCH，因此在非激活时间UE通过减少PDCCH监听达到降低功耗的目的。其中，激活时间至少包括激活期定时器(drx-onDurationTimer)运行的时间，按照目前的C-DRX机制，UE在C-DRX周期开始的子帧经过若干个时隙偏移之后开启drx-onDurationTimer，因此drx-onDurationTimer的起始时间是固定的。由于XR业务和CG业务的视频帧的到达时间存在时域抖动，如果UE按照固定的drx-onDurationTimer进行PDCCH监听，会导致C-DRX的激活时间和视频帧的到达时间不匹配，影响业务传输时延和终端功耗。
综上所述，已有的C-DRX机制不能很好地适用于XR业务和CG业务，需要针对XR业务和CG业务提供适宜的功耗节省方案，并尽量减少对业务的传输时延的影响。
发明内容
本申请提供一种通信方法及装置，提供适用于XR/CG业务的部分监听方式，用以降低XR/CG业务数据传输中UE功耗，并确保较高的传输可靠性。
第一方面，提供一种通信方法。该通信方法可由终端装置实施，终端装置可以是终端设备或终端设备中的部件。终端设备例如是UE。该终端装置可用于接收来自基站的数据， 该数据可以是XR业务或CG业务的数据。
该通信方法包括：终端装置确定第一时间窗的位置信息。所述终端装置在所述第一时间窗内监听第一信息。所述终端装置在第一PDCCH候选位置上监听第一PDCCH，所述第一PDCCH候选位置为所述终端装置监听到所述第一信息之后的至少第N个符号之后的PDCCH候选位置，所述第一信息用于确定有第一数据待传输给所述终端装置，所述第一PDCCH用于调度所述第一数据，N为非负数。所述终端装置确定第二时间窗的位置信息，所述第二时间窗的位置信息承载于所述第一PDCCH、承载所述第一数据的PDSCH或所述第一信息，所述第二时间窗用于所述终端装置接收第二信息，所述第二信息用于确定有第二数据待传输给所述终端装置。
采用以上方法，能够基于动态方式指示下一个数据包对应的激活信息(包括第二信息)的监听时间窗，以及动态触发UE进行PDCCH的监听，提供了适用于XR业务和CG业务的UE功耗降低方法，减少UE盲检PDCCH的次数，能够在降低UE功耗的同时尽量减少对业务的传输时延的影响。
在一种可能的设计中，如果所述终端装置在所述第一时间窗内未监听到第一信息，则所述终端装置在所述第一时间窗的结束符号或时隙之后的第三时间窗内监听所述第一PDCCH。
采用该设计，可降低终端装置第一信息的漏检对业务的传输时延影响。
在一种可能的设计中，所述终端装置还可接收第一时间信息，所述第一时间信息用于指示所述N的取值。
在一种可能的设计中，所述终端装置可接收所述第一时间窗的位置信息，所述第一时间窗的位置信息包括所述第一时间窗的周期、所述第一时间窗在一个周期中的偏移、所述第一时间窗的起始位置和所述第一时间窗的长度中的至少一个。
采用该设计，终端装置可以根据接收到的第一时间窗的配置信息监听第一信息，避免由于UE持续的监听第一信息带来的功耗浪费。
在一种可能的设计中，所述终端装置还可发送第三信息，所述第三信息用于请求所述第一时间窗的位置信息。
在一种可能的设计中，所述终端装置还可发送第四信息，所述第四信息用于请求所述第二时间窗的位置信息。
在一种可能的设计中，所述终端装置可根据第一参数确定所述第一时间窗的位置信息，所述第一参数包括第一数据的帧率和/或第一数据的时域抖动范围。
采用该设计，终端装置可以在未接收到第一时间窗的配置信息的情况下，确定第一时间窗的位置信息以监听第一信息。
在一种可能的设计中，如果所述终端装置在第一PDCCH、所述承载所述第一数据的PDSCH和所述第一信息中未检测到所述第二时间窗的位置信息，则所述终端装置将承载于RRC信令的时间窗的位置信息作为所述第二时间窗的位置信息；或者，
如果所述终端装置在第一PDCCH、所述承载所述第一数据的PDSCH和所述第一信息中未检测到所述第二时间窗的位置信息，则所述终端装置根据第二数据的帧率，确定所述第二时间窗的位置信息。
第二方面，提供一种通信方法。该通信方法可由网络设备实施，网络设备可以是基站或基站中的部件。该网络设备可用于向UE发送数据，该数据可以是XR业务或CG业务 的数据。
该通信方法包括：网络设备确定第一时间窗的位置信息。所述网络设备在所述第一时间窗内发送第一信息，以及在第一PDCCH候选位置发送第一PDCCH，所述第一PDCCH候选位置为所述网络设备发送所述第一信息之后的至少第N个符号之后的PDCCH候选位置，所述第一信息用于确定有第一数据待传输给所述终端装置，所述第一PDCCH用于调度所述第一数据，N为非负数。其中，所述第一PDCCH、承载所述第一数据的PDSCH或所述第一信息还用于承载第二时间窗的位置信息，所述第二时间窗用于所述网络设备发送第二信息，所述第二信息用于确定有第二数据待传输给所述终端装置。
在一种可能的设计中，所述网络设备还可发送第一时间信息，所述第一时间信息用于指示所述N的取值。
在一种可能的设计中，所述网络设备还可向所述终端装置发送所述第一时间窗的位置信息，所述第一时间窗的位置信息包括所述第一时间窗的周期、所述第一时间窗在一个周期中的偏移、所述第一时间窗的起始位置和所述第一时间窗的长度中的至少一个。
在一种可能的设计中，所述网络设备还可接收第三信息，所述第三信息用于请求所述第一时间窗的位置信息。
在一种可能的设计中，所述网络设备还可接收第四信息，所述第四信息用于请求所述第二时间窗的位置信息。
在一种可能的设计中，所述网络设备可根据第一参数确定所述第一时间窗的位置信息，所述第一参数包括所述第一数据的帧率和/或所述第一数据的时域抖动范围。
在一种可能的设计中，所述网络设备将承载于RRC信令的时间窗的位置信息作为所述第二时间窗的位置信息；或者，所述网络设备根据所述第二数据的帧率，确定所述第二时间窗的位置信息。
第三方面，本申请实施例提供一种通信装置，可以实现上述第一方面或其任一可能的设计中由终端装置实现的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为终端装置、或者为可支持终端装置中实现上述方法的芯片、芯片系统、车载通信模组、或处理器等。
示例性的，该通信装置可包括收发单元(或称通信模块、收发模块)和处理单元(或称处理模块)等等模块化组件，这些模块可以执行上述第一方面或其任一可能的设计中终端装置的相应功能。当通信装置是终端装置时，收发单元在执行发送步骤时可以是发送单元，收发单元在执行接收步骤时可以是接收单元，而收发单元可以由收发器代替，发送单元可以由发送器代替，接收单元可以由接收器代替。收发单元可以包括天线和射频电路等，处理单元可以是处理器，例如基带芯片等。当通信装置是具有上述终端装置功能的部件时，收发单元可以是射频单元，处理单元可以是处理器。当通信装置是芯片系统时，收发单元可以是芯片系统的输入输出接口、处理单元可以是芯片系统的处理器，例如：中央处理单元(central processing unit，CPU)。
收发单元可用于执行第一方面或其任一可能的设计中由终端装置执行的接收和/或发送的动作。处理单元可用于执行第一方面或其任一可能的设计中由终端装置执行的接收和发送以外的动作。
可选的，该通信装置可包括收发模块和/或通信模块。
可选的，该通信装置可包括处理器和/或收发器。该通信装置还可包括存储器。
第四方面，本申请实施例提供一种通信装置，可以实现上述第二方面或其任一可能的设计中由网络设备实现的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为网络设备、或者为可支持网络设备中实现上述方法的芯片、芯片系统或处理器等。
示例性的，该通信装置可包括收发单元(或称通信模块、收发模块)和处理单元(或称处理模块)等等模块化组件，这些模块可以执行上述第二方面或其任一可能的设计中第一终端装置的相应功能。当通信装置是网络设备时，收发单元在执行发送步骤时可以是发送单元，收发单元在执行接收步骤时可以是接收单元，而收发单元可以由收发器代替，发送单元可以由发送器代替，接收单元可以由接收器代替。收发单元可以包括天线和射频电路等，处理单元可以是处理器，例如基带芯片等。当通信装置是具有上述网络设备功能的部件时，收发单元可以是射频单元，处理单元可以是处理器。当通信装置是芯片系统时，收发单元可以是芯片系统的输入输出接口、处理单元可以是芯片系统的处理器，例如：CPU。
收发单元可用于执行第二方面或其任一可能的设计中由网络设备执行的接收和/或发送的动作。处理单元可用于执行第二方面或其任一可能的设计中由网络设备执行的接收和发送以外的动作。
可选的，该通信装置可包括收发模块和/或通信模块。
可选的，该通信装置可包括处理器和/或收发器。该通信装置还可包括存储器。
第五方面，提供一种通信系统，该通信系统包括第三方面以及第四方面所示的通信装置。
第六方面，提供一种计算机可读存储介质，该计算机可读存储介质用于存储计算机指令或程序，当该计算机指令或程序在计算机上运行时，使得该计算机执行上述第一方面至第二方面或其任意一种可能的实施方式中所述的方法。
第七方面，提供一种计算机程序产品，当其在计算机上运行时，使得该计算机执行上述第一方面至第二方面或其任意一种可能的设计中所述的方法。
第八方面，提供一种电路，该电路与存储器耦合，该电路被用于执行上述第一方面至第二方面或其任意一种可能的实施方式中所述的方法。该电路可包括芯片电路、芯片或芯片系统等。
以上第二方面至第八方面及其可能的设计的有益效果可参照第一方面及其可能的设计中的有益效果。
附图说明
图1为本申请提供的一种数据包周期的示意图；
图2为本申请提供的一种数据包抖动范围的示意图；
图3为本申请提供的一种C-DRX机制示意图；
图4A为本申请提供的另一种C-DRX机制示意图；
图4B为本申请提供的另一种C-DRX机制示意图；
图5为本申请提供的另一种C-DRX机制示意图；
图6为本申请提供的一种通信系统的架构示意图；
图7为本申请提供的一种通信装置的结构示意图；
图8为本申请提供的另一种通信装置的结构示意图；
图9为本申请提供的一种通信方法的流程示意图；
图10为本申请提供的一种第一时间窗的时域位置示意图；
图11为本申请提供的一种第一PDCCH候选位置的时域示意图；
图12为本申请提供的一种UE监听第一数据和第二数据的过程中的功耗示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。
下面对本申请涉及术语进行解释：
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)终端装置，例如是终端设备，或者是用于实现终端设备的功能的模块，例如芯片系统，该芯片系统可以设置在终端设备中。终端设备包括向用户提供数据连通性的设备，具体的，包括向用户提供数据连通性的设备，或包括向用户提供数据连通性的设备。例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换数据，或与RAN交互数据。该终端设备可以包括用户设备、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、V2X终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端设备，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是车载终端设备，车载终端设备例如也称为车载单元(onBoard unit，OBU)。本申请实施例中，终端设备还可以包括中继(relay)。或者理解为，能够与基站进行数据通信的都可以看作终端设备。
下文中，可通过UE为例对终端装置进行说明。本申请中的UE也可替换为终端装置、终端设备等。
2)网络设备，例如包括接入网(access network，AN)设备，接入网设备可包括但不限于：5G中的下一代基站(gNB)、LTE中的演进型节点B(evolved node B，eNB)、基带单元(baseBand unit，BBU)、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、移动交换中心、还可以是LTE中的演进型(evolutional)NB(eNB或eNodeB)，还可以是未来5G网络中的基站设备或者未来演进的PLMN网络中的接入网设备，还可以是可穿戴设备或车载设备。
其中，终端装置与网络设备之间的通信可通过空口进行。比如，终端装置与网络设备 之间通过空口传输无线资源控制(radio resource control，RRC)消息、下行控制信息(downlink control information，DCI)等空口信令和数据。
应理解，接入网设备还可通过接口与其他网络设备进行通信。其中，接入网设备可通过接入网设备之间的接口与其他接入网设备进行通信；和/或，接入网设备可通过接入网设备与核心网设备之间的接口与核心网设备进行通信，比如，接收来自于核心网的数据。其中，本申请对于接入网设备与其他网络设备之间进行通信的方式不具体限定。
因为本申请实施例主要涉及接入网设备，因此在下文中，如无特殊说明，则所述的网络设备均是指接入网设备。下文中，可通过基站来代表网络设备和/或接入网设备。
在一些部署方式中，网络设备可以包括集中单元(centralized unit，CU)和分布单元(distributed unit，DU)。CU和DU可被部署为一个网络节点，称为集中式部署；或者分别被部署为独立的网络节点，称为分布式部署，此时CU与DU之间可通过CU与DU之间的F1接口进行通信。CU与DU之间的接口包括F1接口和其他的CU与DU之间的接口。接入网设备还可以包括有源天线单元(active antenna unit，AAU)。
其中，CU可实现网络设备的部分功能，DU可实现网络设备的部分功能。比如，CU，负责处理非实时协议和服务，实现RRC层或分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。一种可能的结构中，CU可包括控制面板(control plane，CP)和用户面板(user plane，UP)。CP与UP之间通过E1接口进行通信。
DU可负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU可用于实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层消息，也可以认为是由DU发送的，或者，由DU和AAU发送的。可以理解的是，接入网设备可以为包括CU、DU或者AAU中一项或多项的设备。此外，可以将CU划分为接入网中的设备，或者说将CU作为接入网设备。也可以将CU划分为核心网(core network，CN)中的设备，或者说将CU作为核心网设备，本申请对此不做限定。
本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统，该装置可以被安装在网络设备中。下文中，可通过基站为例对网络设备进行说明。
正如背景部分所介绍的，XR业务和CG业务是5G的重要应用场景之一。其中，XR业务和CG业务有较高的用户体验要求，具有高速率和低时延的特点。下面对XR业务和CG业务的下行视频帧的传输过程进行说明。可由处理XR业务或CG业务的服务器经过内容渲染或编码等处理过程生成视频帧，并将视频帧发送至基站，基站缓存该视频帧的数据，并通过空口传输给UE，UE接收到数据后进行解码等操作。在实际应用中，一个视频帧可以分割为一个或多个网际协议(internet protocol，IP)包(IP packet)。本申请中，数据包可理解为XR业务或CG业务的一个视频帧组成的数据，即数据包可理解为一个或多个IP包的总称，一个数据包的大小可表示一个视频帧的比特数。以VR或AR的下行业务为例，应用层平均速率可以达到45兆比特每秒(Mbps)或者更高，从一个数据包到达基站，到UE成功接收该数据包之间的时间不超过10毫秒(ms)。CG下行业务的应用层平均速率可以达到30Mbps或者更高，一个数据包到达基站，到UE成功接收数据包之间的时间不超过15ms。根据不同IP包的大小，一个IP包可能会分割为多个传输块(transport block，TB) 通过空口传输给UE。通常，一个TB占用一个时隙(slot)或者一个时隙内的几个符号(symbol)，一个TB还可以在多个时隙或者不同符号上重复发送。
XR业务和CG业务的另一个特点是准周期的，它的周期为帧率的倒数，也就是说，XR业务和CG业务第k个数据包与第k+1个数据包之间的间隔为帧率的倒数，通常帧率可以为60帧每秒(frame per second，FPS)或者30FPS、90FPS或120FPS等。以下行业务为例，应理解，帧率为数据包到达基站的频率。如图1所示，60FPS表示1秒时间内有60个数据包，则周期为1/60，约等于16.67毫秒，即平均每16.67毫秒出现一个数据包到达基站，待传输给UE。然而由于渲染、信源编码，核心网拥堵等因素，XR业务和CG业务的数据包存在一定范围内的时域抖动，即数据包有可能会在按照周期确定的到达时刻之前到达基站，也可能会在按照周期确定的到达时刻之后到达基站，相应地，基站在通过空口向UE发送XR业务和CG业务的数据包时也存在时域抖动，因此XR业务和CG业务的数据包不是严格按照周期进行传输的，数据包的到达时间在一定范围内抖动。如图2所示，以60FPS为例，数据包可能会在根据周期确定的到达时域位置(即图2中的预定到达时间)之前或之后到达基站，例如，图2中第k个数据包提前到达，第k+1个数据包延迟到达，造成时域抖动。此外，由于基站调度器策略的因素，基站接收到数据包后，向UE进行调度也存在一定时间范围的抖动。本发明主要以下行业务为例。对于上行业务，基站也需要向UE发送承载上行调度信息的PDCCH，UE同样需要监听PDCCH，因此本发明的实施例也适用于上行业务的传输。
应理解，本申请中每个数据包的大小遵循概率分布，和/或，每个数据包的时域抖动遵循概率分布。
这里结合图2说明数据包的时域抖动范围。假设抖动的范围为-P ms～Q ms，例如，P＝4，Q＝4，则-4ms表示图2中的数据包最多在预定到达(expected traffic arrival)的时域位置之前4ms到达，4ms表示图2中的数据包最多在预定到达的时域位置之后4ms到达。数据包预定到达的时域位置是根据数据包的周期确定的。以预定到达的时域位置为参考点，数据包可能在[-P，Q]ms范围内的任一时刻到达。
由于XR业务和CG业务是准周期的，并不是总是有数据传输的，如果UE长期处于监听PDCCH的状态，会造成UE功耗过高。这是因为UE需要盲检PDCCH获取上/下行数据的调度信息，如果基站没有数据需要向UE传输，不需要向UE发送PDCCH，那么对于UE而言，盲检PDCCH就带来功耗浪费。
下面介绍PDCCH的监听机制和已有的功耗降低机制。
一、PDCCH的监听
PDCCH的作用之一就是用于承载上行或下行数据的调度信息，UE需要周期性的监听PDCCH来获取调度信息，周期可以为1个时隙。如果检测到PDCCH有调度信息，针对下行调度信息，UE可以根据调度信息通过物理下行共享信道(physical downlink shared channel，PDSCH)接收数据，针对上行调度信息，UE根据调度信息通过物理上行共享信道(physical uplink shared channel，PUSCH)发送数据。PDCCH还可以用于承载上行功率控制命令字、时隙格式等信息。承载不同控制信息的PDCCH可以采用不同的无线网络临时标识(radio network temporary identifier，RNTI)进行加扰。
基站可以为UE配置至少一个搜索空间集(search space set，SS set)。UE基于SS set进行PDCCH监听。具体的，UE根据SS set的参数，进行PDCCH监听。例如，每个SS set 的配置信息包括以下至少一项参数：
(1)SS set标识，用于标识SS set；
(2)与该SS set关联的控制资源集(control resource set，CORESET)标识；其中，CORESET表示一个用于承载PDCCH的时频资源集，一个CORESET在频域上由若干个连续的或非连续的资源块(resource block，RB)组成，时域上由连续的1或多个符号组成。具体的，UE可以根据SS set的参数，例如监听周期、偏移或监听图案等，在该SS set关联的CORESET上进行PDCCH监听。
(3)PDCCH监听周期Ks和偏移Os，Ks和Os的取值单位可以为时隙(slot)。
(4)时隙内PDCCH监听图案(pattern)，或者称为时隙内PDCCH监听符号，用于指示该SS set关联的CORESET在时隙内监听PDCCH的起始符号。
(5)持续时间Ts，用于指示该SS set存在的连续的时隙的个数。其中，Ts小于Ks，Ts的取值可以为1个时隙。
(6)聚合等级以及各聚合等级对应的候选PDCCH(PDCCH candidate)的个数。
(7)SS set类型指示，用于指示该SS set是公共搜索空间集(common search space set，CSS set)，可以简称为CSS，或者是用户专用搜索空间集(UE-specific search space set，USS set)，可以简称为USS。其中，若该SS set的类型为CSS，基站还会配置在PDCCH候选位置监听的DCI格式(format)，例如，可以为DCI格式0_0、DCI格式1_0、DCI格式2_0、DCI格式2_1、DCI格式2_2、DCI格式2_3、DCI格式2_4、DCI格式2_5或DCI格式2_6等。若该SS set的类型为USS，则基站也会配置在PDCCH候选位置监听的DCI格式，例如，可以为DCI格式0_0、DCI格式1_0、DCI格式0_1、DCI格式1_1、DCI格式0_2、DCI格式1_2、DCI格式3_0、或DCI格式3_1等。
在一种实现方式中，UE根据上述参数中的PDCCH监听周期、偏移，以及时隙内PDCCH监听图案等，确定PDCCH监听时机(monitoring occasion，MO)(或者称为PDCCH候选位置)。在本发明中，UE监听PDCCH是指UE在PDCCH候选位置监听PDCCH。
二、节省UE功耗的方法
一种常用的节省UE功耗的方法是C-DRX机制。在C-DRX机制中，UE可以根据网络设备配置的DRX周期(DRX cycle)，根据DRX cycle周期性打开接收机监听PDCCH，参阅图3所示。通常，如图3所示，一个DRX周期包含两个时间段：激活时间(active time)和非激活时间(non-active time)。UE在激活时间内的PDCCH候选位置(或称监听时机)进行PDCCH监听，而在非激活时间内可以处于休眠状态，不监听PDCCH。
需要说明的是，在C-DRX机制的非激活时间内，UE并不是所有的PDCCH都不监听的。在非激活时间内，UE不监听的PDCCH至少包括以下RNTI加扰的PDCCH：小区-RNTI(cell-RNTI，C-RNTI)、取消指示-RNTI(cancellation indication-RNTI，CI-RNTI)、配置调度-RNTI(configured scheduling-RNTI，CS-RNTI)、中断-RNTI(interruption-RNTI，INT-RNT)、时隙格式指示-RNTI(slot format indication-RNTI，SFI-RNTI)、半持续-信道状态信息-RNTI(semi-persistent-channel state information-RNTI，SP-CSI-RNTI)、物理上行控制信道发送功率控制-RNTI(transmit power control-physical uplink control channel-RNTI，TPC-PUCCH-RNTI)、物理上行共享信道发送功率控制-RNTI(transmit power control-physical uplink shared channel-RNTI，TPC-PUSCH-RNTI)、探测参考信号发送功率控制-RNTI(transmit power control-sounding reference signal-RNTI，TPC-SRS-RNTI)和可用性 指示-RNTI(availability indication-RNTI，AI-RNTI)。
换句话说，在非激活时间，UE不监听上述RNTI加扰的PDCCH。对于系统消息-RNTI(system information-RNTI，SI-RNTI)、随机接入-RNTI(random access-RNTI，RA-RNTI)、消息B-RNTI(message B-RNTI，MsgB-RNTI)、临时小区-RNTI(temporary cell-RNTI，TC-RNTI)加扰的PDCCH则不受C-DRX机制约束。
可选的，激活时间至少包括DRX激活期定时器(drx-onDurationTimer)对应的时长。基站可通过无线资源控制(radio resource control，RRC)信令向UE配置drx-onDurationTimer(后文简写为onDurationTimer)的长度。以长DRX周期(long DRX cycle)为例，基站会向UE配置用于指示长DRX周期的长度的参数(定义为DRX长周期(drx-LongCycle))、用于确定DRX周期开始的子帧的参数(定义为DRX开始偏移(drx-StartOffset))，以及DRX周期开始的子帧内时隙偏移量(定义为DRX时隙偏移(drx-SlotOffset))，后续为了方便说明，可将基站配置的这些参数称为C-DRX参数。
如果使用长DRX周期，当子帧号(subframe number)满足如下公式，则UE在该子帧号内偏移drx-SlotOffset对应的时隙开启onDurationTimer：
[(SFN×10)+subframe number]modulo(drx-LongCycle)＝drx-StartOffset；
其中，SFN为系统帧号，modulo表示取模运算。
即在DRX cycle开始的子帧经过drx-SlotOffset对应的时隙偏移之后开启onDurationTimer，如图4A所示。图4A中，激活时间的起始时间为onDurationTimer计时开始的时刻，激活时间至少包括onDurationTimer对应的时长。
可选的，激活时间还可能包括DRX非激活定时器(drx-InactivityTimer)(以下简称为InactivityTimer)、DRX下行重传定时器(drx-RetransmissionTimerDL)(以下简称为RetransmissionTimerDL)或者DRX上行重传定时器(drx-RetransmisionTimerUL)(以下简称为RetransmisionTimerUL)中的至少一个等定时器的运行时间。非激活时间则为DRX周期中除激活时间以外的时间。
如表1所示C-DRX机制中的定时器和参数的说明，这里的定时器包括onDurationTimer、InactivityTimer、RetransmissionTimerDL以及RetransmisionTimerUL等。表1中说明了各定时器的触发时机。
Figure PCTCN2022094210-appb-000001
Figure PCTCN2022094210-appb-000002
表1
根据C-DRX机制的上述描述可知，当基站配置了C-DRX参数以后，UE周期性打开onDurationTimer的时间位置也就固定了，则每个DRX cycle的激活时间的起始时间也就是固定的，也就是onDurationTimer的开启时间是周期性的。在应用于XR业务或CG业务的传输时，由于XR业务和CG业务的数据包存在时域抖动，会有一些数据包提前或延后到达网络。对于提前到达的数据包，基站需要等到激活时间才能向UE进行调度，会增加传输时延，降低了用户体验；如果数据包延后到达网络，则UE在激活时间的一段时间内监听了PDCCH，但实际没有数据包的调度，会带来功耗浪费。应理解，如图4B所示这里的提前到达，是指数据包在激活时间的起始时间(即打开onDurationTimer的时间)之前达到基站；延后到达是指，数据包在激活时间的起始时间之后达到基站。这里的传输时延可以是指从数据包到达基站，到基站将数据包发送给UE之间的时间。
一种减少传输时延的方法是配置较长的onDurationTimer或者较小的DRX cycle，使得激活时间能覆盖数据包抖动的范围，但是会导致C-DRX机制节省UE功耗的好处降低。
另外，如图5所示，XR业务和CG业务的周期一般为非整数，例如为，16.67ms，8.33ms，而C-DRX周期的长度一般为整数或者以时隙长度为粒度，如16ms，16.5ms，因此XR业务和CG业务的周期很难和C-DRX周期长度匹配，经过一段时间以后XR业务或CG业务的数据包按照周期确定的到达时刻也会和C-DRX的onDurationTimer在时间上错开。
因此，目前的C-DRX机制不能很好地适用于XR业务和CG业务，需要针对XR业务和CG业务等提供新的UE功耗降低方案，并减少传输时延。
本申请实施例提供一种通信方法，用以提供适用于XR业务和CG业务的UE功耗降低方案。如图6所示，该方法可由通信系统中的基站和UE实施。该基站可用于接收经过XR业务或CG业务服务器处理的数据包，并将数据包通过空口发送至UE。该通信系统还可包括核心网设备(图6中未示出)，核心网设备可以包括接入和移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、用户面功能(user plane function，UPF)网元、策略控制功能(policy control function，PCF)网元、统一数据管理(unified data management，UDM)网元、和应用功能(application function，AF)网元等。可选的，核心网设备可以接收XR业务或CG业务的服务器处理的数据包，并将数据包发送至基站。应理解，图6所示的通信系统中各个设备的数量仅作为示意，本申请实施例并不限于此，实际应用中在通信系统中还可以包括更多的UE、更多的网络设备，还可以包括其它设备。
如图7和图8所示，为本申请实施例提供的通信装置的结构示意图，用于实施本申请实施例提供的通信方法。应理解，该通信装置可用于实现本申请实施例中由基站和/或UE执行的动作。
示例性的，图7示出了一种可能的通信装置的结构示意图，该结构可包括处理模块(或处理单元)710和收发模块(或收发单元)720。示例性地，图7所示结构可以是基站或UE，也可以是应用于基站或UE中的芯片或者其他具有本申请所示基站或UE功能的组合器件、部件(或称组件)等。当该结构是基站或UE时，收发模块720可以是收发器，收发器可以包括通信接口、天线或射频电路等，用于支持通信装置通过有线和/或无线方式进行通信。处理模块710可以是处理器，例如包括一个或多个中央处理单元(central processing unit，CPU)。当该结构是具有本申请所示基站或UE功能的部件时，收发模块720可以是接口电路，处理模块710可以是处理器。当该结构是芯片系统时，收发模块720可以是芯片(例如基带芯片)的输入输出接口、处理模块710可以是芯片系统的处理器，可以包括一个或多个中央处理单元。应理解，本申请实施例中的处理模块710可以由处理器或处理器相关电路组件实现，收发模块720可以由收发器或收发器相关电路组件实现。
例如，处理模块710可以用于执行本申请任一实施例中由基站或UE所执行的除了收发操作之外的全部操作，例如处理操作，和/或用于支持本文所描述的技术的其它过程，比如生成由收发模块720发送的消息、信息和/或信令，和对由收发模块720接收的消息、信息和/或信令进行处理。收发模块720可以用于执行本申请任一实施例中由基站或UE所执行的全部接收和发送操作，和/或用于支持本文所描述的技术的其它过程，例如数据的发送和/或接收。
另外，收发模块720可以是一个功能模块，该功能模块既能完成发送操作也能完成接收操作，例如收发模块720可以用于执行由基站或UE所执行的全部发送操作和接收操作，例如，在执行发送操作时，可以认为收发模块720是发送模块，而在执行接收操作时，可以认为收发模块720是接收模块；或者，收发模块720也可以是两个功能模块，收发模块720可以视为这两个功能模块的统称，这两个功能模块分别为发送模块和接收模块，发送模块用于完成发送操作，例如发送模块可以用于执行由基站或UE所执行的全部发送操作，接收模块用于完成接收操作，接收模块可以用于执行由基站或UE所执行的全部接收操作。
图8示出了另一种通信装置的结构示意图，用于执行本申请实施例提供的由基站或UE执行的动作。如图8所示，通信装置可包括处理器和存储器。处理器主要用于对通信协议以及通信数据进行处理，以及对通信装置进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。通信接口主要用于基站与UE之间的通信。
以上通信装置还可包括天线和射频电路，用于通过无线通信方式进行通信，例如，基站可通过天线和射频电路发送下行数据，UE可通过天线和射频电路接收下行数据。当需要发送数据(或信息、信号)时，通信装置的处理器还可对待发送的数据进行基带处理，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据(或信息、信号)发送到通信装置时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
在本申请实施例中，可以将具有收发功能的天线和/或射频电路视为通信装置的收发单元。收发单元还可包括通信接口等。收发单元可以是一个功能单元，该功能单元能够实现发送功能和接收功能；或者，收发单元也可以包括两个功能单元，分别为能够实现接收功能的接收单元和能够实现发送功能的发送单元。还可将具有处理功能的处理器视为通信装置的处理单元。如图8所示，通信装置可包括收发单元810和处理单元820。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元810中用于实现接收功能的器件视为接收单元，将收发单元810中用于实现发送功能的器件视为发送单元，即收发单元810包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
应理解，收发单元810可与收发模块720对应，或者说，收发模块720可由收发单元810实现。收发单元810用于执行本申请所示实施例中的基站和/或UE的发送操作和接收操作，和/或用于支持本文所描述的技术的其它过程。处理单元820可与处理模块710对应，或者说，处理模块710可由处理单元820实现。处理单元820用于执行本申请所示实施例基站和/或UE除了收发操作之外的其他操作，例如用于执行本申请所示实施例中由基站和/或UE所执行的除接收和发送以外的全部操作，和/或用于支持本文所描述的技术的其它过程。
为便于说明，图8中仅示出了一个存储器和处理器。在实际的通信装置中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
下面结合图9对本申请实施例提供的通信方法中基站和UE执行的动作进行说明。如图9所示，该通信方法可包括以下步骤：
S101：UE确定第一时间窗的位置信息。第一时间窗的位置信息可用于确定第一时间窗的时间位置。
相应地，基站也可以确定第一时间窗的位置信息。
其中，第一时间窗可以是基站和UE之间达成一致的时间窗，基站可在第一时间窗内 发送第一信息，UE可在第一时间窗内监听第一信息。本申请中的第一信息用于确定有数据待传输给UE，也可以描述为用于确定有数据包到达基站，基站将向UE进行调度，或者直接描述为用于指示UE开始监听PDCCH，则UE可基于该第一信息开始进行PDCCH的监听。本申请中，用于确定有数据待传输给UE的信息也可描述为用于确定基站将向UE进行调度的信息，或者，可描述为用于指示UE开始监听PDCCH的信息。用于确定有数据待传输给UE的信息也可被称为激活信息，也就是，该信息可用于触发UE进行PDCCH的监听，或者用于确定基站将向UE进行调度。其中，用于确定有数据待传输给UE的信息包括但不限于本申请中的第一信息和第二信息。
其中，第一信息可以为PDCCH承载的DCI，或者，第一信息可以为通过序列生成的信号，例如，第一信息是在特定时频域位置发送的参考信号或同步信号。其中，参考信号例如是信道状态信息参考信号(channel state information-reference signal，CSI-RS)。应理解，本申请中的监听也可替换为检测，其中，当第一信息承载于PDCCH时，可称UE监听第一信息，当第一信息为通过序列生成的信号时，可称UE检测第一信息。
可选的，第一时间窗可理解为时域上周期性分布的多个时间窗中的一个时间窗，或者第一时间窗的位置可以通过DCI、MAC控制元素(MAC control element，MAC CE)或第一时间窗之前的激活信息动态指示。本申请中该多个时间窗可用于监听激活信息。
这里通过举例的方式对第一时间窗的位置信息的设置方式进行说明。
方式1、基站向UE发送第一时间窗的位置信息。例如，基站可向UE发送第一配置信息，第一配置信息携带第一时间窗的位置信息。
其中，这里第一时间窗的位置信息可包括上述周期性分布的时间窗的周期、第一时间窗在一个周期中的偏移、第一时间窗的起始位置和第一时间窗的长度中的至少一个。UE可根据第一配置信息确定第一时间窗的位置。
假设周期性分布的时间窗的周期为T，第一时间窗在一个周期中的偏移为offset，offset可以为0。例如，通过以下公式确定第一时间窗在一个周期中的起始位置为无线帧n f中的时隙
Figure PCTCN2022094210-appb-000003
Figure PCTCN2022094210-appb-000004
其中
Figure PCTCN2022094210-appb-000005
表示对于参数集(numerology)μ，每个无线帧包含的时隙数，modulo表示取模运算。无线帧也可以称作系统帧，一个无线帧为10ms，一个无线帧可由多个子帧(subframe)组成，每个子帧由多个时隙组成。
可选的，第一时间窗的位置信息还可以包括第一时间窗的起始符号位置。
可选的，可以将drx-LongCycle或者drx-ShortCycle作为上述第一配置信息配置的周期性分布的时间窗的周期，drx-SlotOffset作为第一时间窗在一个周期中的偏移，则第一时间窗的起始位置为，当子帧号(subframe number)满足如下公式时，该子帧号内偏移drx-SlotOffset对应的时隙：
[(SFN×10)+subframe number]modulo(drx-LongCycle)＝drx-StartOffset。
或者，第一时间窗的起始位置为，当子帧号满足如下公式时，该子帧号内偏移drx-SlotOffset对应的时隙：
[(SFN×10)+subframe number]modulo(drx-ShortCycle)＝(drx-StartOffset)modulo(drx-ShortCycle)；
此时第一时间窗的起始位置为通过C-DRX参数确定的onDurationTimer起始时刻。
可选的，第一时间窗的长度可以等于onDurationTimer的长度。
在一种可能的实现方式中，以上第一配置信息可携带在RRC信令中，因此基站可通过RRC信令向UE配置第一时间窗的位置信息。比如，RRC信令可携带周期性分布的时间窗的周期、偏移offset、时间窗的起始位置或时间窗的长度中的至少一个，UE可根据RRC信令确定周期性分布的多个时间窗。可选的，UE可将每个时间窗作为第一时间窗，因此可在每个时间窗内监听第一信息。
在另一种可能的实现方式中，第一配置信息可以通过第一时间窗之前的PDCCH或者PDSCH通知给UE。具体地，基站可以在周期性分布的时间窗中的一个时间窗(该时间窗在该第一时间窗开始之前)内向UE发送激活信息，该激活信息可用于触发UE进行PDCCH的监听。UE根据该激活信息开始监听PDCCH，该PDCCH至少包括用于调度数据的PDCCH，根据监听到的PDCCH携带的调度信息，通过PDSCH接收数据，则用于监听第一信息的第一时间窗的位置信息可携带在上述PDCCH或PDSCH中。由于一个数据包可以分为多个TB，当UE检测到激活信息以后，UE可以监听到多个用于调度数据的PDCCH以及通过多个PDSCH接收数据，因此，第一时间窗的位置信息可携带在上述多个PDCCH中的至少一个PDCCH或者上述多个PDSCH中的至少一个PDSCH中。UE除了监听用于调度数据的PDCCH，还可以监听其他类型的PDCCH，例如承载组公共DCI的PDCCH，则第一时间窗的位置信息也可以携带在组公共DCI中另外，可选的，第一时间窗的位置信息还可以携带在该激活信息中。上述用于调度数据的PDCCH还可以用于调度PUSCH，当UE检测到承载上行调度信息的PDCCH，则UE根据上行调度信息向基站发送PUSCH。
此时，第一时间窗的位置信息可携带在DCI、MAC CE或者第一时间窗之前的激活信息中，用于指示第一时间窗相对于之前的用于UE监听激活信息的时间窗的位置偏移量。例如，承载于DCI的第一时间窗的位置信息可指示第一时间窗相对于之前最近的一个用于UE监听激活信息的时间窗(即上一个用于UE监听激活信息的时间窗)的位置偏移量。或者，第一时间窗的位置信息可指示第一时间窗相对于周期性分布的时间窗的位置偏移量。该DCI携带的第一时间窗的位置信息可以包括第一时间窗的起始位置和第一时间窗的长度中的至少一个。
当第一时间窗的位置信息携带在上述多个PDSCH中的至少一个PDSCH中时，一种可能的实现方式包括，在MAC层，基站将第一时间窗的位置信息承载在MAC CE中，并将该MAC CE传输到物理层，基站在物理层通过PDSCH将MAC CE发送给UE。相应地，UE接收PDSCH，解析出MAC CE中携带的第一时间窗的位置信息。
方式2、基站和/或UE根据第一参数确定第一时间窗的位置信息，第一参数包括第一数据的帧率和/或第一数据的时域抖动范围。本申请中的数据包的帧率和时域抖动范围可以是与数据包所属业务相关的，也就是说，对于一个特定的业务，不同数据包的帧率和时域抖动范围可以相同。在确定第一时间窗的位置信息之前，基站和/或UE还可以先确定帧率和/或时域抖动范围。
示例性的，以XR或CG的下行业务为例，假设数据包的帧率是60FPS，数据包对应的周期约为16.67ms，基站和/或UE可以对该周期向上或者向下取整，确定16ms或者17ms为周期性分布的时间窗的周期。或者，以时隙长度为粒度和数据包的周期确定周期性分布的时间窗的周期，以时隙长度为0.5ms为例，周期性分布的时间窗的周期可以为16.5ms或者17ms。可选的，基于周期性分布的时间窗的周期，例如16ms，基站和/或UE可以根 据方式1中的公式1确定第一时间窗的起始位置，此时可认为offset取0。
基站和/或UE还可以根据抖动的范围确定第一时间窗的窗长，或者，确定第一时间窗起始位置和结束位置。如图10所示，假设抖动的范围为-P ms至Q ms，例如P＝4且Q＝4，则基站和/或UE可以以一个数据包预定到达的时域位置向前推移4ms，得到边界X，以及以该数据包预定到达的时域位置向后推移4ms，得到边界Y，X和Y分别为第一时间窗的起始位置和结束位置。或者，确定第一时间窗的窗长为(P+Q)ms。
据此，基站和/或UE可分别根据数据包的帧率和/或时域抖动范围确定第一时间窗的位置信息。
以上方式1和方式2仅仅是示例性的说明，在实际应用中也可根据需要结合使用，例如，基站向UE配置第一时间窗的周期(该周期可以是上述第一配置信息配置的周期性分布的时间窗的周期)，基站和UE根据第一参数确定第一时间窗的窗长，或者，第一时间窗起始位置和结束位置。还可以，基站和UE根据第一参数确定第一时间窗的周期，基站向UE配置第一时间窗的窗长。此外，也可在UE没有按照方式1获得第一时间窗的位置信息情况下，由UE按照方式2确定第一时间窗的位置信息。
另外，除方式1和方式2外，也可以通过预配置、协议定义或其他的基站与UE之间的协商方式，使得基站与UE确定第一时间窗的位置信息。
通过上述方式1中根据周期确定的第一时间窗或者根据方式2确定的第一时间窗可以认为是默认的时间窗，用于监听第一信息。该默认的时间窗可以是周期性出现的。
可选的，在UE确定第一时间窗的位置信息之前，UE可向基站发送请求信息(本申请中可称为第三信息)，用于请求第一时间窗的位置信息。其中，该第三信息可用于请求第一时间窗的位置信息，或者用于请求第一时间窗相对于之前的一个时间窗(该时间窗是指用于监听激活信息的时间窗，例如，第一时间窗的前一个用于监听激活信息的时间窗)的位置偏移量，或者，用于请求第一时间窗相对于周期性分布的时间窗的位置偏移量，或者，可用于请求获得第一参数。第三信息也可以用于指示UE建议的第一时间窗的位置信息和/或建议的位置偏移量。作为一种可选的发送方式，该第三信息可以通过RRC信令发送给基站，例如，该RRC信令可以为UE辅助信息。
S102：基站在第一时间窗内发送第一信息。
本申请中，第一信息可以为PDCCH承载的下行控制信息(downlink control information，DCI)，即第一信息可承载于PDCCH。或者，通过序列生成第一信息，序列可以是伪随机序列，ZC(Zadoff-Chu)序列等。可选的，可以采用参考信号或者同步信号作为第一信息，可将参考信号或者同步信号称为第一信号。
以CSI-RS作为第一信号为例，可以通过伪随机序列生成CSI-RS。CSI-RS的序列生成公式可满足：
Figure PCTCN2022094210-appb-000006
其中，c(i)表示生成序列使用的伪随机序列，c(i)的初始值c init可满足：
Figure PCTCN2022094210-appb-000007
Figure PCTCN2022094210-appb-000008
表示一个时隙中的符号数量，
Figure PCTCN2022094210-appb-000009
表示一个无线帧中的时隙号，l表示一个时隙中的OFDM符号编号，n ID可以通过RRC参数配置，表示小区的标识或UE的标识。伪随 机序列是一种非正交序列，伪随机序列生成得到的序列r(d)也是非正交序列。
再例如，以ZC序列生成第一信号。其中ZC根序列生成公式可满足：
Figure PCTCN2022094210-appb-000010
其中，r(n)表示ZC序列，n＝0、1、2……ρN-1，N为信号发送宽度，以资源块(resource block，RB)为单位，ρ为信号发送密度，表示每个RB中有多少个RE，q表示ZC根序列的根植，1＜q＜N ZC。在只根据ZC根序列生成ZC序列的情况下，m＝nmodN ZC，m＝0、1、2……N ZC-1，mod表示取余。可以将ZC根序列作为ZC序列，还可以根据ZC根序列和循环移位信息生成ZC序列。再根据ZC序列生成第一信号。
可选的，基站在从XR业务或CG业务的服务器获得待发送至UE的数据包后，在第一时间窗内向UE发送第一信息，以触发UE进行PDCCH的监听。
S103：UE在第一时间窗内监听第一信息。
可选的，UE在第一时间窗内采用低功耗的状态监听第一信息。这里的低功耗的方式例如，在第一时间窗内，UE可以只监听第一信息。假如第一信息是PDCCH承载的DCI，则UE在第一时间窗内监听用于承载第一信息的PDCCH，不需要在第一时间窗内监听承载其他功能的PDCCH，例如，不监听C-RNTI、CS-RNTI，MCS-RNTI等RNTI加扰的PDCCH，以减少PDCCH盲检，相比UE盲检多种RNTI加扰的PDCCH，功耗要低。假如第一信息为通过序列生成的参考信号或同步信号，UE只需要在第一信息的时频域位置进行序列检测，UE同样不需要监听PDCCH，通过序列检测结果确定基站将向UE进行调度，由于序列检测的复杂度较低，同样达到低功耗的效果。可选的，采用序列生成的参考信号作为激活信号，不仅可以节省检测激活信号所需的功耗，该激活信号还可以用于进行时频同步、波束测量等功能。
应理解，本申请不限定S102和S103的执行顺序。例如，S103中，UE可从第一时间窗的起始时间开始监听第一信息，而在S102中，基站可在第一时间窗中的任意时间发送第一信息，因此S102实际上可能在S103之后执行。
S104：基站在第一PDCCH候选位置发送第一PDCCH，其中，第一PDCCH可用于调度第一数据。该第一PDCCH候选位置可以是基站发送第一信息(或第一信息占用的符号或时隙)之后，至少间隔N个符号之后的PDCCH候选位置，N为非负数。基站还向UE发送第一PDCCH调度的第一数据。即基站发送第一信息以后，至少间隔N个符号之后可以向UE发送PDCCH。
可选的，第一PDCCH候选位置可位于一定的时间段内，以减少UE盲检，节省UE功耗。
其中，第一PDCCH可以为C-RNTI，调制和编码方式-小区-RNTI(modulation and coding scheme-C-RNTI，MCS-C-RNTI)或CS-RNTI加扰的PDCCH。应理解，基站发送第一信息以后，除了发送用于调度第一数据的第一PDCCH，基站还可以发送其他功能的PDCCH，本申请不具体限定。
PDCCH候选位置参考前文描述。应理解，如图11所示，这里的第一PDCCH候选位置可能是多个PDCCH候选位置中部分的PDCCH候选位置，即基站发送第一信息以后，至少间隔N个符号之后的PDCCH候选位置。图11中，每一个方块表示一个PDCCH候选 位置，基站可以在第一信息以后的PDCCH候选位置发送PDCCH。
可选的，基站还可向UE发送用于指示N的取值信息(本申请中可称为第一时间信息)，或者，N的取值可通过预配置、协议定义或UE与基站之间的信令协商确定。例如，在由基站向UE发送第一时间信息时，第一时间信息可携带在第一信息中。
可选的，基站在第一时间窗内发送第一信息后的第N个符号或第N个符号之后开启一个定时器，例如，基站发送第一信息后的第N个符号开启该定时器，或在发送第一信息后的第N+1个符号之后开启一个定时器，或在发送第一信息后的第N个符号之后的第一个时隙的起始位置开启该定时器，或在发送第一信息后的第N+1个符号之后的第一个时隙的起始位置开启该定时器。在定时器的时长内，基站可以通过PDCCH候选位置发送PDCCH。也就是说，基站可以通过第一信息触发定时器运行。通过该方法，可以减少UE盲检PDCCH，从而节省UE功耗。
可选的，第一PDCCH还可以用于调度PUSCH，则基站还将接收UE发送的PUSCH。
S105：UE在第一时间窗内监听到第一信息后，在第一PDCCH候选位置监听第一PDCCH。UE可根据承载于第一PDCCH的调度信息接收承载第一数据的PDSCH。
第一PDCCH候选位置参见S104中的描述。
可选的，UE可以开启定时器，在该定时器的计时期间内监听第一PDCCH。定时器的时长可以理解为一个时间段，也就是说，UE可以在一个时间段内的PDCCH候选位置监听第一PDCCH。其中，UE可在监听到第一信息后，间隔N个符号的时长后开启该定时器的计时。当该定时器的计时结束，UE可以停止监听PDCCH，以降低功耗。基站可以向UE配置定时器的时长或者监听PDCCH的时间段长度。
其中，本实施例所示的根据第一时间窗监听第一信息的方案，可以作为现有C-DRX机制的增强方案，也可以作为一种独立方案。如果作为增强方案，在步骤S104之前，基站还需要向UE配置C-DRX参数，可以将C-DRX机制中的onDurationTimer或者drx-InactivityTimer或C-DRX机制中的其他定时器作为该定时器。例如，使用onDurationTimer作为该定时器，此时onDurationTimer将不能再作为第一时间窗，第一时间窗可以根据S101中方式1和方式2的其他方式确定。本实施例中onDurationTimer是根据XR业务或CG业务的视频帧到达时间开启的，现有C-DRX机制中onDurationTimer只能在固定的时间位置开启，缺少灵活性。再例如，使用drx-InactivityTimer作为该定时器，本实施例中UE尚未检测到第一信息，可以在onDurationTimer不监听PDCCH或者不开启onDurationTimer，一旦检测到第一信息，则按照上述方法开启drx-InactivityTimer，而现有C-DRX机制中onDurationTimer内总是需要监听PDCCH。再例如，步骤S101中将onDurationTimer作为第一时间窗，将drx-InactivityTimer作为监听第一PDCCH的定时器，UE在onDurationTimer内监听激活信息，而不需要监听第一PDCCH，当UE监听到激活信息，则UE开启drx-InactivityTimer并监听第一PDCCH。如果作为一种独立方案，基站不需要向UE配置C-DRX参数，该定时器可以是新定义的定时器，该定时器可以定义为激活时间。本申请中，onDurationTimer作为第一时间窗是指，将onDurationTimer的起始位置作为第一时间窗的起始位置，以及将onDurationTimer长度作为第一时间窗的长度。onDurationTimer不作为第一时间窗是指，不将onDurationTimer的起始位置作为第一时间窗的起始位置。将drx-InactivityTimer作为监听第一PDCCH的定时器是指，将drx-InactivityTimer的长度作为监听第一PDCCH的定时器的长度。
应理解，本发明不限制N的时间单位，N的单位可以为符号、时隙或毫秒等，也可以是包括符号、时隙或毫秒的时间单元组合。在S104和S105中，N个符号也可替换为时域偏移值，即第一PDCCH候选位置是在发送第一信息之后，至少间隔一个时域偏移值之后的PDCCH候选位置。UE可在监听到第一信息后，经过该时域偏移值的时长后开启定时器的计时，在定时器运行期间的PDCCH候选位置监听PDCCH。此时，第一时间信息可用于向UE指示该时域偏移值，或者，时域偏移值可通过预配置、协议定义或UE与基站之间的信令协商确定。示例性的，该时域偏移值小于或等于1个时隙对应的时长。
可选的，如果UE在第一时间窗内未监听到第一信息，则UE可在第一时间窗的结束符号或时隙之后开始监听第一PDCCH。例如，在该结束符号或时隙之后的第三时间窗内监听第一PDCCH。这是因为，基于XR业务和CG业务准周期的特征，在数据包预定到达的时间位置和时域抖动范围内，基站大概率有数据向UE发送，因此基站较大概率会在第一时间窗内发送第一信息，UE如果未在第一时间窗内监听到第一信息，说明UE可能漏检了第一信息，为了降低第一信息的漏检对业务的传输时延影响，UE可在第一时间窗的结束符号或时隙之后监听PDCCH。
举例来说，可以将onDurationTimer、drx-InactivityTimer或C-DRX机制中的其他定时器作为第三时间窗，第三时间窗也可以是新定义的定时器的计时期间。
可选的，UE可在第一时间窗的结束符号或时隙后，经过M个符号的时长后开启定时器，在定时器运行期间，UE监听PDCCH。当该定时器的计时结束，UE可以停止监听PDCCH，以降低功耗。基站可以向UE配置定时器的时长。M的单位也可以替换为时隙或毫秒等，或者是包括符号、时隙或毫秒的时间单元组合。这里的M个符号也可以替换为时域偏移值。M与N可以相等或不相等。M的确定方式可参照N的确定方式，这里不再赘述。
应理解，本申请不限定S104和S105的执行顺序。例如，在S105中，UE可以从第一PDCCH候选位置中的第一个PDCCH候选位置开始监听第一PDCCH，而在S104中，基站可以在第一PDCCH候选位置中的任意一个PDCCH候选位置发送第一PDCCH，因此S104实际上可能在S105之后执行。
可选的，如果第一PDCCH用于承载PUSCH的调度信息，则UE将向基站发送PUSCH。
S106：UE确定第二时间窗的位置信息。
其中，第二时间窗的位置信息可承载于第一PDCCH、承载第一数据的PDSCH或第一信息。应理解，本申请不限定S106的执行时序，比如，UE在接收到第一信息后就从第一信息中获取第二时间窗的位置信息，则S106可位于S103之后，且位于S104和/或S105之前。又如，UE在接收到第一PDCCH后就从第一PDCCH中获取第二时间窗的位置信息，则S106可位于S105之后。又如，UE在接收到承载第一数据的PDSCH后从该PDSCH中获取第二时间窗的位置信息，则S106可位于S105之后。
相应地，基站也可以确定第二时间窗的位置信息。基站和/或UE确定第二时间窗的位置信息的确定方式参考S101中的方式1和方式2。例如对应于方式1，基站可通过配置信息确定第二时间窗的位置信息。其中，第二时间窗的位置信息可包括周期性分布的时间窗的周期、第二时间窗在一个周期中的偏移、第二时间窗的起始位置和第二时间窗的长度中的至少一个。又如，对应于方式2，基站可根据第二参数确定第二时间窗的位置信息，第二参数包括第二数据的帧率和/或第二数据的时域抖动范围。
其中，第二时间窗用于基站发送第二信息，或者说，第二时间窗用于UE接收第二信 息。该第二信息用于确定有第二数据待传输给UE。也就是说，第二信息用于触发UE进行PDCCH的监听。第二信息的表述可以参考S101中第一信息的表述。这里的第二数据为XR业务或CG业务数据。第一数据与第二数据为不同时刻到达基站的数据包，可以理解为XR业务的两个视频帧或者CG业务的两个视频帧。
本申请中基站向UE指示第二时间窗的位置信息的一种实现方式中，基站可以在第一时间窗内向UE发送第一信息，UE根据该第一信息开始监听第一PDCCH，该第一PDCCH至少包括用于调度数据的PDCCH，可根据监听到的第一PDCCH携带的调度信息，通过第一PDSCH接收第一数据，则第二时间窗的位置信息可携带在第一PDCCH或第一PDSCH中。由于一个数据包可以分为多个TB，当UE检测到第一信息以后，UE可以监听到多个第一PDCCH以及多个PDSCH，因此，第二时间窗的位置信息可携带在多个第一PDCCH中的至少一个PDCCH或者多个第一PDSCH中的至少一个PDSCH中。UE除了监听用于调度数据的PDCCH，还可以监听其他类型的PDCCH，例如承载组公共DCI的PDCCH，第二时间窗的位置信息也可以携带在组公共DCI中。另外第二时间窗的位置信息还可以携带在第一信息中，即，基站可以通过第一时间窗中的第一信息指示第二时间窗的位置信息。此时，第二时间窗的位置信息可指示第二时间窗相对于第一时间窗的位置偏移量，或者相对于周期性分布的时间窗的偏移量。承载于第一PDCCH、承载第一数据的PDSCH或第一信息第二时间窗的位置信息也可以包括第二时间窗的起始位置和第二时间窗的长度中的至少一个。
当第二时间窗的位置信息携带在多个第一PDSCH中的一个PDSCH中，具体地，可包括：在MAC层，基站将第二时间窗的位置信息承载在MAC CE中，并将该MAC CE传输到物理层，基站在物理层通过第一PDSCH将MAC CE发送给UE。相应地，UE接收第一PDSCH，并解析出MAC CE中携带的第二时间窗的位置信息。
应理解，UE可从第二时间窗的起始时间开始监听第二信息，基站可在第二时间窗中的任意时间发送第二信息。
可选的，基站可以在第一PDCCH、承载第一数据的PDSCH和第一信息中不指示第二时间窗的位置信息，即基站没有通过第一PDCCH、承载第一数据的PDSCH和第一信息调整UE监听激活信息的时间窗，或者，基站在第一PDCCH、承载第一数据的PDSCH或第一信息中指示了第二时间窗的位置信息，但UE在第一PDCCH、承载第一数据的PDSCH和第一信息中未检测到第二时间窗的位置信息，则UE可根据第三配置信息确定第二时间窗的位置信息。第三配置信息可参照第一配置信息设置，比如，第三配置信息可携带在RRC信令中，用于通过配置周期性的用于监听激活信息的时间窗。
可选的，第一配置信息和第三配置信息为同一个配置信息(例如，为RRC信令携带的配置信息)，该配置信息可用于确定周期性分布的多个时间窗，因此可认为根据RRC信令确定周期性分布的时间窗中的位于第一时间窗的之后的下一个时间窗作为第二时间窗。
或者，基站和/或UE根据第二数据的帧率和/或时域抖动范围确定第二时间窗的位置信息。例如，基站可以在第一PDCCH、承载第一数据的PDSCH和第一信息中不指示第二时间窗的位置信息，即基站没有通过第一PDCCH、承载第一数据的PDSCH和第一信息调整UE监听激活信息的时间窗，或者，基站在第一PDCCH、承载第一数据的PDSCH和/或第一信息中指示了第二时间窗的位置信息，但UE在第一PDCCH、承载第一数据的PDSCH和第一信息中未检测到第二时间窗的位置信息，则UE可根据第一信息的时域位置、第二 数据的帧率和时域抖动范围确定第二时间窗的位置信息，例如，假设第一信息的时域位置为t0，帧率为A，时域抖动范围为[-P,Q]ms，则第二时间窗的范围为t0+1/A向前偏移P ms，向后偏移Q ms之间的范围；或者，可根据第二数据的帧率和时域抖动范围确定第二时间窗的位置信息，可参考方式2确定第一时间窗的方法；或者，可根据第二数据的时域抖动范围和第一信息的时域位置确定第二时间窗的位置信息，或者，可根据第二数据的帧率和第一信息的时域位置确定第二时间窗的位置信息。可选的，在第一数据与第二数据所属业务相同时，第二数据的帧率与第一数据的帧率相同，且第二数据的时域抖动范围与第一数据的时域抖动范围可以相同。
可选地，基站和/或UE还可根据第一时间窗的位置或者步骤S104和S105中监听第一PDCCH的定时器的位置确定第二时间窗的位置信息。例如，第二时间窗的起始位置为第一时间窗的起始位置偏移一个时间长度，或者，为步骤S104和S105中的定时器的起始位置偏移一个时间长度，该时间长度可以等于或约等于第二数据帧率的倒数。
示例性的，在发送第二信息后，基站还可发送第二PDCCH和承载第二数据的PDSCH，UE可在监听到第二信息后，监听第二PDCCH和接收承载第二数据的PDSCH。其中，监听第二PDCCH和接收承载第二数据的PDSCH的方式可以参考S104和S105中对于UE监听第一PDCCH和接收承载第一数据的PDSCH的说明，比如，UE在第二PDCCH候选位置监听第二PDCCH，第二PDCCH的监听范围可参照第一PDCCH的监听范围确定。可选的，第二信息的信号类型与第一信息相同，也就是说，第二信息可以为PDCCH承载的DCI，或者，第二信息可以为通过序列生成的信号，例如参考信号。
可选的，第二PDCCH也可用于调度PUSCH或者为承载其他功能的非调度DCI，当第二PDCCH承载了PUSCH的调度信息，则UE向基站发送PUSCH。
以此类推，基站还可以通过第二信息，第二PDCCH或承载第二数据的PDSCH承载下一个用于监听激活信息的时间窗的位置信息。可选的，在S106之前，UE可向基站发送请求信息(本申请中可称为第四信息)，用于请求第二时间窗的位置信息。第四信息也可以用于指示UE建议的第二时间窗的位置信息和/或建议的位置偏移量。具体的可参考第三信息的描述。
以上S101-S106中，基站的接收和发送动作可由收发模块720和/或收发单元810实现，UE的接收和发送动作可由收发模块720和/或收发单元810实现。基站的发送动作可由收发模块720和/或收发单元810实现，UE的接收动作可由收发模块720和/或收发单元810实现。
基于图9所示方法，UE可根据来自于基站的第一信息、承载第一数据的PDSCH或第一PDCCH确定第二时间窗的位置，并根据第二时间窗监听第二信息，其中，第一信息和第二信息具有相同的功能，都是用于触发UE开始监听PDCCH，只是为了区分在不同的时间窗内发送和接收。因此，针对XR业务和CG业务的准周期性和时域抖动性，能够通过DCI、MAC CE或者之前的激活信息指示下一个数据包对应的激活信息的监听时间窗，以及通过下一个数据包对应的激活信息动态触发UE进行PDCCH的监听，提供了适用于XR业务和CG业务的UE功耗降低方法，能够在降低UE功耗的同时尽量减少对业务的传输时延的影响。
图9所示流程中，UE监听激活信息和监听PDCCH的过程可参照图12所示。如图12所示，UE可在第一时间窗内采用较低的功耗监听第一信息。当监听到第一信息，则UE 在第一PDCCH候选位置监听第一PDCCH，并根据第一PDCCH接收承载第一数据的PDSCH，其中，第一PDCCH候选位置的确定方式参见前述方法实施例部分的说明。图12中，基站通过第一PDCCH指示第二时间窗的位置信息，UE还可采用较低的功耗在第二时间窗内监听第二信息。当监听到第二信息则在第二PDCCH候选位置监听第二PDCCH，并根据第二PDCCH接收第二数据，其中，第二PDCCH候选位置的确定方式参见前述方法实施例部分的说明。图12中，当UE监听到第一信息和第二信息，UE还可以启动定时器，UE在定时器的计时范围内监听PDCCH。
可选的，在上述实施例中，当UE在第一时间窗内的某个时刻检测到第一信息，那么UE在第一时间窗的剩余时间里可以停止监听第一信息。第二时间窗和第二信息同理。
可选的，在UE监听第一信息之前，UE还可接收来自于基站的第二配置信息，该第二配置信息至少可用于配置第一信息的时频资源。当第一信息为PDCCH承载的DCI，此时第二配置信息可包括SS set的配置信息，SS set的配置信息可用于配置第一信息的时频资源以及DCI格式，UE可根据SS set的配置信息在第一时间窗内监听第一信息。
其中，为了减少UE监听第一信息的功耗，基站可以通过第二配置信息向UE指示小带宽(如较小的频域资源)，因此UE可以在一个较小的带宽上监听第一信息，相比用大带宽监听，可以进一步节省UE的功耗。例如，基站限制用于监听第一信息的CORESET大小。
可选的，基站还可以通过第二配置信息向UE指示用于承载第一信息的DCI format，UE在第一时间窗内可以只监听该DCI format；或者，只监听特定RNTI加扰的PDCCH，从而减少了UE盲检PDCCH的次数，降低UE功耗。
再例如，基站可以通过第二配置信息指示UE在第一时间窗内监听PDCCH的最大盲检次数，以降低PDCCH盲检次数，本发明不限制降低PDCCH盲检次数的方法。
当第一信息为通过序列生成的信号时，第二配置信息可指示第一信息的时频资源，例如，承载第一信息的符号位置，带宽，密度或频域位置等。可选的，第二配置信息可以复用CSI-RS的资源集合(resource set)和资源的配置。
同理，在UE监听第二信息之前，UE还可接收来自于基站的第四配置信息，该第四配置信息至少可用于配置第二信息的时频资源。第四配置信息还可用于配置第二信息的盲检次数和/或DCI格式等。第四配置信息的实现方式可参照第二配置信息的说明，例如，当第二信息为PDCCH承载的DCI时，第四配置信息可包括SS set的配置信息，当第二信息为通过序列生成的信号时，第四配置信息可包括用于指示第二信息的时频资源的信息。
可选的，第二配置信息和第四配置信息为同一个配置信息(例如，为RRC信令携带的配置信息)。
基于相同的发明构思，本申请实施例还提供一种通信装置，用于实现以上由终端装置和/或网络设备实现的功能。该装置可包括图7和/或图8所示结构。
在通过图7所示结构实现本申请实施例提供的终端装置时，所述处理模块710，用于确定第一时间窗的位置信息。所述收发模块720，用于在所述第一时间窗内监听第一信息，并在第一PDCCH候选位置上监听第一PDCCH，所述第一PDCCH候选位置为所述终端装置监听到所述第一信息之后的至少第N个符号之后的PDCCH候选位置，所述第一信息用于确定有第一数据待传输给所述终端装置，所述第一PDCCH用于调度所述第一数据，N 为非负数。所述处理模块710还用于，确定第二时间窗的位置信息，所述第二时间窗的位置信息承载于所述第一PDCCH、承载所述第一数据的PDSCH或所述第一信息，所述第二时间窗用于所述终端装置接收第二信息，所述第二信息用于确定有第二数据待传输给所述终端装置。
在一种可能的设计中，所述收发模块720还用于：如果所述终端装置在所述第一时间窗内未监听到第一信息，则在所述第一时间窗的结束符号或时隙之后的第三时间窗内监听所述第一PDCCH。
在一种可能的设计中，所述收发模块720还用于：
接收第一时间信息，所述第一时间信息用于指示所述N的取值。
在一种可能的设计中，所述收发模块720还用于：
接收所述第一时间窗的位置信息，所述第一时间窗的位置信息包括所述第一时间窗的周期、所述第一时间窗在一个周期中的偏移、所述第一时间窗的起始位置和所述第一时间窗的长度中的至少一个。
在一种可能的设计中，所述收发模块720还用于：
发送第三信息，所述第三信息用于请求所述第一时间窗的位置信息。
在一种可能的设计中，所述收发模块720还用于：
发送第四信息，所述第四信息用于请求所述第二时间窗的位置信息。
在一种可能的设计中，所述处理模块710具体用于：
根据第一参数确定所述第一时间窗的位置信息，所述第一参数包括所述第一数据的帧率和/或所述第一数据的时域抖动范围。
在一种可能的设计中，所述处理模块710还用于：
如果所述终端装置在第一PDCCH、所述承载所述第一数据的PDSCH和所述第一信息中未检测到所述第二时间窗的位置信息，则将承载于RRC信令的时间窗的位置信息作为所述第二时间窗的位置信息；或者，如果所述终端装置在第一PDCCH、所述承载所述第一数据的PDSCH和所述第一信息中未检测到所述第二时间窗的位置信息，则根据所述第二数据的帧率，确定所述第二时间窗的位置信息。
在通过图8所示结构实现本申请实施例提供的终端装置时，以上示例中由处理模块710执行的动作可由图8所示的处理单元820执行，不再赘述。同理，以上由收发模块720执行的第一通信装置的动作可由图8所示的收发单元810执行。
在通过图7所示结构实现本申请实施例提供的网络设备时，处理模块710，用于确定第一时间窗的位置信息。所述收发模块720，用于所述第一时间窗内发送第一信息，并在第一PDCCH候选位置发送第一PDCCH，所述第一PDCCH候选位置为所述网络设备发送所述第一信息之后的至少第N个符号之后的PDCCH候选位置，所述第一信息用于确定有第一数据待传输给所述终端装置，所述第一PDCCH用于调度所述第一数据，N为非负数。其中，所述第一PDCCH、承载所述第一数据的PDSCH或所述第一信息还用于承载第二时间窗的位置信息，所述第二时间窗用于所述网络设备发送第二信息，所述第二信息用于确定有第二数据待传输给所述终端装置。
在一种可能的设计中，所述收发模块720还用于：
发送第一时间信息，所述第一时间信息用于指示所述N的取值。
在一种可能的设计中，所述收发模块720还用于：
向所述终端装置发送所述第一时间窗的位置信息，所述第一时间窗的位置信息包括所述第一时间窗的周期、所述第一时间窗在一个周期中的偏移、所述第一时间窗的起始位置和所述第一时间窗的长度中的至少一个。
在一种可能的设计中，所述收发模块720还用于：
接收第三信息，所述第三信息用于请求所述第一时间窗的位置信息。
在一种可能的设计中，所述收发模块720还用于：
接收第四信息，所述第四信息用于请求所述第二时间窗的位置信息。
在一种可能的设计中，所述处理模块710具体用于：
根据第一参数确定所述第一时间窗的位置信息，所述第一参数包括所述第一数据的帧率和/或所述第一数据的时域抖动范围。
在一种可能的设计中，处理模块710还可用于：
将承载于RRC信令的时间窗的位置信息作为所述第二时间窗的位置信息；或者，根据所述第二数据的帧率，确定所述第二时间窗的位置信息。
在通过图8所示结构实现本申请实施例提供的网络设备时，以上示例中由处理模块710执行的动作可由图8所示的处理单元820执行，不再赘述。同理，以上由收发模块720执行的第二通信装置的动作可由图8所示的收发单元810执行。
应理解，装置实施例中出现的各个术语以及各种可能的实现方式的细节可以参考上述方法实施例中的描述或解释，此处不再赘述。
本申请实施例提供一种通信系统。该通信系统可以包括上述实施例所涉及的第一终端装置和/或第二终端装置。可选的，该通信系统可包括图1至图2中任一所示结构。该通信装置可用于实现图8所示的通信方法中由第一终端装置和/或第二终端装置实现的步骤。
本申请实施例还提供一种计算机可读存储介质，计算机可读存储介质用于存储计算机程序，该计算机程序被计算机执行时，计算机可以实现上述方法实施例提供的图8所示的实施例中与第一终端装置和/或第二终端装置相关的流程。
本申请实施例还提供一种计算机程序产品，计算机程序产品用于存储计算机程序，该计算机程序被计算机执行时，计算机可以实现上述方法实施例提供的图8所示的实施例中与第一终端装置和/或第二终端装置相关的流程。
本申请实施例还提供一种芯片或芯片系统(或电路)，该芯片可包括处理器，该处理器可用于调用存储器中的程序或指令，执行上述方法实施例提供的图8所示的实施例中与第一终端装置和/或第二终端装置相关的流程。该芯片系统可包括该芯片，还可存储器或收发器等其他组件。
需要说明的是，上述实施例中的通信装置可以是终端设备，也可以是应用于终端设备中的芯片或者其他可实现上述终端设备功能的组合器件、部件等。当通信装置是终端设备时收发单元可以是发送器和接收器，或整合的收发器，可以包括天线和射频电路等，处理单元可以是处理器，例如基带芯片等。当通信装置是具有上述终端设备功能的部件时，收发单元可以是射频单元，处理单元可以是处理器。当通信装置是芯片系统时，收发单元可以是芯片系统的输入输出接口、处理单元可以是芯片系统的处理器，例如：中央处理单元(central processing unit，CPU)。
可以理解的是，本申请的实施例中的处理器可以是CPU，还可以是其它通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated  circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中的方法步骤可以通过硬件的方式来实现，也可以由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器、闪存、只读存储器、可编程只读存储器、可擦除可编程只读存储器、电可擦除可编程只读存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于第一终端装置和/或第二终端装置中。当然，处理器和存储介质也可以作为分立组件存在于网络设备或终端设备中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序或指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多个可用介质的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，数字视频光盘；还可以是半导体介质，例如，固态硬盘。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。在本申请的文字描述中，字符“/”，一般表示前后关联对象是一种“或”的关系；在本申请的公式中，字符“/”，表示前后关联对象是一种“相除”的关系。
本申请实施例中，“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A、B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一(项)个”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a、b或c中的至少一项(个)，可以表示：a，b，c，a和b，a和c，b和c，或a、b和c，其中a、b、c可以是单个，也可以是多个。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定。

Claims (33)

  1. 一种通信方法，其特征在于，包括：
    终端装置确定第一时间窗的位置信息；
    所述终端装置在所述第一时间窗内监听第一信息；
    所述终端装置在第一PDCCH候选位置上监听第一PDCCH，所述第一PDCCH候选位置为所述终端装置监听到所述第一信息之后的至少第N个符号之后的PDCCH候选位置，所述第一信息用于确定有第一数据待传输给所述终端装置，所述第一PDCCH用于调度所述第一数据，N为非负数；
    所述终端装置确定第二时间窗的位置信息，所述第二时间窗的位置信息承载于所述第一PDCCH、承载所述第一数据的PDSCH或所述第一信息，所述第二时间窗用于所述终端装置接收第二信息，所述第二信息用于确定有第二数据待传输给所述终端装置。
  2. 如权利要求1所述的方法，其特征在于，还包括：
    如果所述终端装置在所述第一时间窗内未监听到第一信息，则所述终端装置在所述第一时间窗的结束符号或时隙之后的第三时间窗内监听所述第一PDCCH。
  3. 如权利要求1或2所述的方法，其特征在于，还包括：
    所述终端装置接收第一时间信息，所述第一时间信息用于指示所述N的取值。
  4. 如权利要求1-3中任一所述的方法，其特征在于，所述终端装置确定第一时间窗的位置信息，包括：
    所述终端装置接收所述第一时间窗的位置信息，所述第一时间窗的位置信息包括所述第一时间窗的周期、所述第一时间窗在一个周期中的偏移、所述第一时间窗的起始位置和所述第一时间窗的长度中的至少一个。
  5. 如权利要求4所述的方法，其特征在于，还包括：
    所述终端装置发送第三信息，所述第三信息用于请求所述第一时间窗的位置信息。
  6. 如权利要求1-5中任一所述的方法，其特征在于，还包括：
    所述终端装置发送第四信息，所述第四信息用于请求所述第二时间窗的位置信息。
  7. 如权利要求1-3中任一所述的方法，其特征在于，所述终端装置确定第一时间窗的位置信息，包括：
    所述终端装置根据第一参数确定所述第一时间窗的位置信息，所述第一参数包括所述第一数据的帧率和/或所述第一数据的时域抖动范围。
  8. 如权利要求1-7中任一所述的方法，其特征在于，所述方法还包括：
    如果所述终端装置在第一PDCCH、所述承载所述第一数据的PDSCH和所述第一信息中未检测到所述第二时间窗的位置信息，则所述终端装置将承载于RRC信令的时间窗的 位置信息作为所述第二时间窗的位置信息；或者，
    如果所述终端装置在第一PDCCH、所述承载所述第一数据的PDSCH和所述第一信息中未检测到所述第二时间窗的位置信息，则所述终端装置根据所述第二数据的帧率，确定所述第二时间窗的位置信息。
  9. 一种通信方法，其特征在于，包括：
    网络设备确定第一时间窗的位置信息；
    所述网络设备在所述第一时间窗内发送第一信息；
    所述网络设备在第一PDCCH候选位置发送第一PDCCH，所述第一PDCCH候选位置为所述网络设备发送所述第一信息之后的至少第N个符号之后的PDCCH候选位置，所述第一信息用于确定有第一数据待传输给所述终端装置，所述第一PDCCH用于调度所述第一数据，N为非负数；
    其中，所述第一PDCCH、承载所述第一数据的PDSCH或所述第一信息还用于承载第二时间窗的位置信息，所述第二时间窗用于所述网络设备发送第二信息，所述第二信息用于确定有第二数据待传输给所述终端装置。
  10. 如权利要求9所述的方法，其特征在于，还包括：
    所述网络设备发送第一时间信息，所述第一时间信息用于指示所述N的取值。
  11. 如权利要求9或10所述的方法，其特征在于，还包括：
    所述网络设备向所述终端装置发送所述第一时间窗的位置信息，所述第一时间窗的位置信息包括所述第一时间窗的周期、所述第一时间窗在一个周期中的偏移、所述第一时间窗的起始位置和所述第一时间窗的长度中的至少一个。
  12. 如权利要求11所述的方法，其特征在于，还包括：
    所述网络设备接收第三信息，所述第三信息用于请求所述第一时间窗的位置信息。
  13. 如权利要求9-12中任一所述的方法，其特征在于，还包括：
    所述网络设备接收第四信息，所述第四信息用于请求所述第二时间窗的位置信息。
  14. 如权利要求9或10所述的方法，其特征在于，所述网络设备确定第一时间窗的位置信息，包括：
    所述网络设备根据第一参数确定所述第一时间窗的位置信息，所述第一参数包括所述第一数据的帧率和/或所述第一数据的时域抖动范围。
  15. 如权利要求9-14中任一所述的方法，其特征在于，所述方法还包括：
    所述网络设备将承载于RRC信令的时间窗的位置信息作为所述第二时间窗的位置信息；或者，
    所述网络设备根据所述第二数据的帧率，确定所述第二时间窗的位置信息。
  16. 一种通信装置，其特征在于，包括收发模块和处理模块；
    所述处理模块，用于确定第一时间窗的位置信息；
    所述收发模块，用于在所述第一时间窗内监听第一信息，并在第一PDCCH候选位置上监听第一PDCCH，所述第一PDCCH候选位置为所述终端装置监听到所述第一信息之后的至少第N个符号之后的PDCCH候选位置，所述第一信息用于确定有第一数据待传输给所述终端装置，所述第一PDCCH用于调度所述第一数据，N为非负数；
    所述处理模块还用于，确定第二时间窗的位置信息，所述第二时间窗的位置信息承载于所述第一PDCCH、承载所述第一数据的PDSCH或所述第一信息，所述第二时间窗用于所述终端装置接收第二信息，所述第二信息用于确定有第二数据待传输给所述终端装置。
  17. 如权利要求16所述的通信装置，其特征在于，所述收发模块还用于：
    如果所述终端装置在所述第一时间窗内未监听到第一信息，则在所述第一时间窗的结束符号或时隙之后的第三时间窗内监听所述第一PDCCH。
  18. 如权利要求16或17所述的通信装置，其特征在于，所述收发模块还用于：
    接收第一时间信息，所述第一时间信息用于指示所述N的取值。
  19. 如权利要求16-18中任一所述的通信装置，其特征在于，所述收发模块还用于：
    接收所述第一时间窗的位置信息，所述第一时间窗的位置信息包括所述第一时间窗的周期、所述第一时间窗在一个周期中的偏移、所述第一时间窗的起始位置和所述第一时间窗的长度中的至少一个。
  20. 如权利要求19所述的通信装置，其特征在于，所述收发模块还用于：
    发送第三信息，所述第三信息用于请求所述第一时间窗的位置信息。
  21. 如权利要求16-20中任一所述的通信装置，其特征在于，所述收发模块还用于：
    发送第四信息，所述第四信息用于请求所述第二时间窗的位置信息。
  22. 如权利要求16-21中任一所述的通信装置，其特征在于，所述处理模块具体用于：
    根据第一参数确定所述第一时间窗的位置信息，所述第一参数包括所述第一数据的帧率和/或所述第一数据的时域抖动范围。
  23. 如权利要求16-22中任一所述的通信装置，其特征在于，所述处理模块还用于：
    如果所述终端装置在第一PDCCH、所述承载所述第一数据的PDSCH和所述第一信息中未检测到所述第二时间窗的位置信息，则将承载于RRC信令的时间窗的位置信息作为所述第二时间窗的位置信息；或者，
    如果所述终端装置在第一PDCCH、所述承载所述第一数据的PDSCH和所述第一信息中未检测到所述第二时间窗的位置信息，则根据所述第二数据的帧率，确定所述第二时间窗的位置信息。
  24. 一种通信装置，其特征在于，包括收发模块和处理模块；
    所述处理模块，用于确定第一时间窗的位置信息；
    所述收发模块，用于所述第一时间窗内发送第一信息，并在第一PDCCH候选位置发送第一PDCCH，所述第一PDCCH候选位置为所述网络设备发送所述第一信息之后的至少第N个符号之后的PDCCH候选位置，所述第一信息用于确定有第一数据待传输给所述终端装置，所述第一PDCCH用于调度所述第一数据，N为非负数；
    其中，所述第一PDCCH、承载所述第一数据的PDSCH或所述第一信息还用于承载第二时间窗的位置信息，所述第二时间窗用于所述网络设备发送第二信息，所述第二信息用于确定有第二数据待传输给所述终端装置。
  25. 如权利要求24所述的通信装置，其特征在于，所述收发模块还用于：
    发送第一时间信息，所述第一时间信息用于指示所述N的取值。
  26. 如权利要求24或25所述的通信装置，其特征在于，所述收发模块还用于：
    向所述终端装置发送所述第一时间窗的位置信息，所述第一时间窗的位置信息包括所述第一时间窗的周期、所述第一时间窗在一个周期中的偏移、所述第一时间窗的起始位置和所述第一时间窗的长度中的至少一个。
  27. 如权利要求26所述的通信装置，其特征在于，所述收发模块还用于：
    接收第三信息，所述第三信息用于请求所述第一时间窗的位置信息。
  28. 如权利要求24-27中任一所述的通信装置，其特征在于，所述收发模块还用于：
    接收第四信息，所述第四信息用于请求所述第二时间窗的位置信息。
  29. 如权利要求24或25所述的通信装置，其特征在于，所述处理模块具体用于：
    根据第一参数确定所述第一时间窗的位置信息，所述第一参数包括所述第一数据的帧率和/或所述第一数据的时域抖动范围。
  30. 如权利要求24-29中任一所述的通信装置，其特征在于，所述处理模块还用于：
    将承载于RRC信令的时间窗的位置信息作为所述第二时间窗的位置信息；或者，
    根据所述第二数据的帧率，确定所述第二时间窗的位置信息。
  31. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1-8中任一项所述的方法，或者使得所述计算机执行如权利要求9-15中任意一项所述的方法。
  32. 一种通信系统，其特征在于，包括如权利要求16-23中任一项所述的通信装置，以及包括如权利要求24-30中任一项所述的通信装置。
  33. 一种计算机程序产品，其特征在于，所述计算机程序产品包括指令，当处理器执行所述指令时，实现如权利要求1-8中任意一项所述的方法，或者，实现如权利要求9-15中任意一项所述的方法。
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