WO2021204169A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2021204169A1
WO2021204169A1 PCT/CN2021/085849 CN2021085849W WO2021204169A1 WO 2021204169 A1 WO2021204169 A1 WO 2021204169A1 CN 2021085849 W CN2021085849 W CN 2021085849W WO 2021204169 A1 WO2021204169 A1 WO 2021204169A1
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WIPO (PCT)
Prior art keywords
time
time period
length
period
network device
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PCT/CN2021/085849
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English (en)
Chinese (zh)
Inventor
谢信乾
龙毅
郭志恒
高翔
戴喜增
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华为技术有限公司
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Publication of WO2021204169A1 publication Critical patent/WO2021204169A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies

Definitions

  • the present invention relates to the field of mobile communication, in particular to a communication method and device.
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRA NR Dual Connectivity EN-DC
  • EN-DC EN-DC
  • NR E-UTRA Dual Connectivity that is, NR network equipment is the main network equipment, and LTE network equipment is the auxiliary network equipment. Since both EN-DC and NE-DC terminals are connected to network devices with two different wireless access technologies, these DC modes can also be collectively referred to as Multi-RAT Dual Connectivity (MR-Dual Connectivity). DC).
  • MR-Dual Connectivity Multi-RAT Dual Connectivity
  • DC Multi-RAT Dual Connectivity
  • CA Carrier Aggregation
  • one carrier is the primary carrier and the other is the secondary carrier.
  • the primary carrier and the secondary carrier can use the same duplex mode or different duplex modes.
  • the primary carrier uses the TDD mode
  • the secondary carrier uses the FDD mode.
  • the downlink carrier and uplink carrier of the system are carriers of the same carrier frequency.
  • the uplink and downlink decoupling technology can be applied.
  • an additional uplink carrier may also be used for uplink communication.
  • the additional uplink carrier is usually called an uplink supplementary carrier (SUL, Supplementary UL), and the carrier frequency F2 of the SUL is smaller than F1.
  • the NR terminal device may have two uplink carriers for uplink communication with the network device, and the two uplink carriers correspond to one downlink carrier.
  • a typical scenario is that the NR TDD carrier frequency is in the 3.5 GHz frequency band, and the SUL frequency is in the 1.8 GHz frequency band.
  • each antenna of a terminal device is shared by two different frequencies, and each antenna can only be set to one operating frequency within a period of time, when the terminal device switches between the two frequency bands, such as when the terminal device switches from frequency
  • the terminal device needs a certain length of time to adjust the working frequency of the antenna from F1 to F2, and this process usually takes 20 microseconds.
  • the terminal when the time interval between the terminal device sending an uplink signal on the F1 carrier and switching to the F2 carrier to send the uplink signal is greater than the length of its antenna, the terminal can arbitrarily 20 times within this time interval. Antenna switching takes place in microseconds. Therefore, the network device cannot determine when the terminal device completes the antenna switching. Taking into account that the terminal equipment will affect the performance of receiving the downlink signal on the downlink carrier during the antenna switching process, causing the downlink to be interrupted. This makes it impossible for the network equipment to schedule the terminal equipment to receive the downlink signal within the time interval of the antenna switching, so as to avoid the interruption of the downlink signal reception caused by the antenna switching, which will lead to a waste of communication resources.
  • the network device schedules the terminal device to receive the downlink signal, it needs to avoid the time unit that may be interrupted due to antenna switching. It can be seen that in the prior art, due to the uncertainty of the time length position of the terminal device antenna, the network device cannot accurately avoid the time unit that may be interrupted due to antenna switching, so it does not perform downlink to the terminal device during the entire time interval. Communication, resulting in a waste of downlink communication resources.
  • This article describes a method and device for sending or receiving data to improve the utilization of downlink communication resources in a scenario where multiple uplink carriers perform uplink communication.
  • a communication method provided by an embodiment of the present invention includes:
  • the terminal device receives first downlink control information from the network device, where the first downlink control information instructs the terminal device to receive the first downlink signal from the network device in the first time period of the first downlink carrier,
  • the start time of the first time period is before the start time of the second time period and after the end time of the third time period
  • the second time period is used for the terminal equipment to be on the second uplink carrier Sending a first uplink signal to the network device
  • the third time period is used by the terminal device to send a second uplink signal to the network device on the first uplink carrier
  • the above communication method can also be replaced with:
  • the terminal device receives first downlink control information from the network device, where the first downlink control information instructs the terminal device to receive the first downlink signal from the network device in the first time period of the first downlink carrier,
  • the start time of the first time period is before the start time of the second time period and after the end time of the third time period
  • the second time period is used for the terminal equipment to be on the second uplink carrier Sending a first uplink signal to the network device
  • the third time period is used by the terminal device to send a second uplink signal to the network device on the first uplink carrier
  • the terminal device determines to receive from the network device at least one symbol corresponding to the time that the switching time of the terminal device does not overlap in time in the first downlink signal.
  • the terminal device determines whether to receive the downlink signal according to the time period of the downlink signal to be received, so that the network device can schedule the terminal device to receive the downlink signal at a time position not used for antenna switching, which improves the utilization of communication resources. .
  • determining to receive at least one symbol of the first downlink signal from a network device according to the first time period includes:
  • the second time difference between the start time of the first time period and the end time of the third time period is not less than the time length, it is determined to receive the first downlink from the network device Signal;
  • the first time difference between the end time of the first time period and the start time of the second time period, and the difference between the start time of the first time period and the end time of the third time period If at least one of the second time differences between the two is not less than the time length, determine to receive the first downlink signal from the network device;
  • the length of time includes the time of antenna switching of the terminal device.
  • An alternative design of this design is: determining whether to receive the first downlink signal from the network device according to the first time period, including:
  • the terminal device determines to receive the first downlink signal from the network device, and the time length includes the time of antenna switching of the terminal device.
  • determining to receive at least one symbol of the first downlink signal from a network device according to the first time period includes:
  • the first time difference between the end time of the first time period and the start time of the second time period is less than the length of time, it is determined to receive the first downlink signal from the network device In the first symbol, the end time of the time period occupied by the first symbol is before the start time of the second time period, and the end time of the time period occupied by the first symbol is the same as the end time of the second time period.
  • the time difference between the start time of the time period is not less than the time length; or
  • the second time difference between the start time of the first time period and the end time of the third time period is less than the length of time, it is determined to receive the first downlink signal from the network device Wherein the start time of the time period occupied by the second symbol is after the end time of the third time period, and the start time of the time period occupied by the second symbol is in the After the end of the third time period; or
  • the first time difference between the end time of the first time period and the start time of the second time period, and the difference between the start time of the first time period and the end time of the third time period In the case where the second time difference is less than the first time difference, it is determined to receive the third symbol in the first downlink signal from the network device, where the end time of the time period occupied by the third symbol Before the start time of the second time period, and the time difference between the end time of the time period occupied by the first symbol and the start time of the second time period is not less than the time length, or the first time period
  • the start time of the time period occupied by the three symbols is after the end time of the third time period
  • the start time of the time period occupied by the second symbol is after the end time of the third time period;
  • the length of time includes the time of antenna switching of the terminal device.
  • An alternative design of this design is: determining whether to receive the first downlink signal from the network device according to the first time period, including:
  • the terminal device determines to receive at least one symbol of the first downlink signal in a time other than the overlap time in the first time period.
  • the method also includes:
  • the first time difference between the end time of the first time period and the start time of the second time period is less than the time length, it is determined not to receive the first downlink signal;
  • the second time difference between the start time of the first time period and the end time of the third time period is less than the time length, it is determined not to receive the first downlink signal;
  • the length of time includes the time of antenna switching of the terminal device.
  • An alternative design of this design is: determining whether to receive the first downlink signal from the network device according to the first time period, including:
  • the terminal device determines not to receive the first downlink signal.
  • the terminal device can determine whether to receive the downlink signal according to the time position of the uplink signal to be sent and the downlink signal to be received, so that the network device can schedule the terminal device to receive the downlink signal at a time position that is not used for antenna switching. So as to ensure downstream transmission
  • the method also includes:
  • the terminal device receives first indication information from the network device, where the first indication information indicates a first downlink resource, and the first downlink resource is used to carry the first type of downlink signal sent by the network device;
  • the terminal device determines a time length according to the first downlink resource, the time period corresponding to the first downlink resource does not overlap in time, and the start time of the time length is later than the second time
  • the end time of the period, the end time of the time length is earlier than the start time of the third time period
  • the length of time includes the time of antenna switching of the terminal device.
  • the terminal equipment determines the length of time for uplink antenna switching.
  • the time length does not overlap with the first downlink resource in time.
  • the time length determined by the terminal equipment can avoid important downlink signals such as SSB to ensure Normal reception of important downlink signals.
  • the method also includes:
  • the terminal device receives second downlink control information from the network device, where the second downlink control information instructs the terminal device to send a third uplink signal to the network device in a fourth time period on the first uplink carrier or the second uplink carrier;
  • the terminal device determines whether to send the third uplink signal to the network device according to the fourth time period and time length.
  • the terminal device determines whether to send the uplink signal according to the time period of the uplink signal to be sent and the length of time for antenna switching, so that the network device can schedule the terminal device to send the uplink signal at a time position that is not used for antenna switching. Improve the utilization of communication resources.
  • this application also provides a communication device, which can implement the communication method described in the first aspect.
  • the device may be a terminal device, or may be another device capable of implementing the foregoing communication method, which may implement the foregoing method by software, hardware, or by hardware executing corresponding software.
  • the device may include a processor and a memory.
  • the processor is configured to support the device to perform a corresponding function in the method described in any one of the foregoing aspects.
  • the memory is used for coupling with the processor, and it stores the program instructions and data necessary for the device.
  • the device may also include a communication interface to support communication between the device and other devices.
  • the communication interface can be a transceiver or a transceiver circuit.
  • an embodiment of the present invention provides a communication system, which includes the communication device described in the foregoing aspect.
  • Another aspect of the present application provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the methods described in the foregoing aspects.
  • Another aspect of the present application provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the methods described in the above aspects.
  • the present application also provides a chip system, which includes a processor and may also include a memory, for implementing the method described in any one of the above aspects.
  • any device or computer storage medium or computer program product or chip system or communication system provided above is used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can be referred to the corresponding method provided above. The beneficial effects of the corresponding solutions in the method are not repeated here.
  • Figure 1 is a schematic diagram of an uplink supplementary carrier scenario
  • FIG. 2 is a schematic diagram of terminal equipment antenna switching
  • 3(a) and 3(b) are schematic diagrams of an embodiment of the wireless communication system provided by the present invention.
  • 4(a) and 4(b) are schematic diagrams of another embodiment of the wireless communication system provided by the present invention.
  • 5(a) and 5(b) are schematic diagrams of another embodiment of the wireless communication system provided by the present invention.
  • FIG. 6 is a schematic flowchart of an embodiment of a communication method provided by the present invention.
  • FIG. 7 is a schematic diagram of whether there is an overlap between the first time period and the time length in an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an embodiment of whether a terminal device receives a first downlink signal from a network device in this application;
  • FIG. 9 is a schematic diagram of another embodiment of whether a terminal device receives a first downlink signal from a network device in this application.
  • FIG. 10 is a schematic diagram of another embodiment of whether a terminal device receives a first downlink signal from a network device in this application;
  • FIG. 11 is a schematic diagram of an embodiment of a method for determining a time length by a terminal device according to the present invention.
  • FIG. 12 is a schematic diagram of a terminal device provided by the present invention for determining the time length
  • FIG. 13 is a schematic diagram of an embodiment of an uplink signal sending method provided by the present invention.
  • FIG. 14 is a schematic structural diagram of an embodiment of a communication device provided by the present invention.
  • FIG. 15 is a schematic structural diagram of an embodiment of a communication device provided by the present invention.
  • component used in this specification are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution.
  • the component may be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program, and/or a computer running on a processor.
  • the application running on the computing device and the computing device can be components.
  • One or more components may reside in processes and/or threads of execution, and components may be located on one computer and/or distributed among two or more computers.
  • these components can be executed from various computer readable media having various data structures stored thereon.
  • the component can be based on, for example, a signal having one or more data packets (e.g. data from two components interacting with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through a signal) Communicate through local and/or remote processes.
  • a signal having one or more data packets (e.g. data from two components interacting with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through a signal) Communicate through local and/or remote processes.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile Communication
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • NR New Radio
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC machine type communication
  • V2V vehicle to vehicle
  • the embodiments of the present invention describe various embodiments in conjunction with access network equipment and terminal equipment, in which:
  • Terminal equipment can also be called User Equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, user Agent or user device.
  • the terminal device can be a station (STAION, ST) in the WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, and personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, and next-generation communication systems, such as fifth-generation communication (fifth- generation, 5G) network terminal equipment or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) network terminal equipment, etc.
  • 5G fifth-generation communication
  • PLMN Public Land Mobile Network
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices. It is a general term for using wearable technology to intelligently design everyday wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • the access network device may be a device used to communicate with a mobile device, such as a network device, and the access network device may be used to provide a wireless communication function for a terminal device.
  • the access network equipment may include various forms of macro base stations, micro base stations (also called small stations), relay stations, access points, and so on.
  • the access network equipment can be an Access Point (AP) in WLAN, a Base Transceiver Station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, or an NR system
  • the gNB in LTE can also be an evolved base station (Evolutional Node B, eNB or eNodeB), or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device in the future 5G network or an evolved PLMN in the future Network equipment in the network, etc.
  • the above-mentioned devices for providing wireless communication functions for terminal devices are collectively referred to as access network devices. In this application, if there is no special description, network equipment and access network equipment are equivalent terms.
  • the network equipment provides services for the cell, and the terminal equipment communicates with the network equipment through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell.
  • the cell may be a network equipment. (E.g. base station) the corresponding cell, the cell can belong to the macro base station or the base station corresponding to the small cell.
  • the small cell here can include: Metro cell, Micro cell, Pico cell (Pico cell), femto cell (Femto cell), etc., these small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.
  • the carrier in the LTE system or the 5G system can have multiple cells working at the same frequency at the same time.
  • the concept of the above-mentioned carrier and the cell can also be regarded as equivalent.
  • CA Carrier Aggregation
  • the concept of carrier and cell can be regarded as equivalent.
  • the UE accessing a carrier and accessing a cell are equivalent.
  • Sub-carrier In the OFDM system, frequency domain resources are divided into several sub-resources, and each sub-resource in the frequency domain can be called a sub-carrier. Subcarriers can also be understood as the smallest granularity of frequency domain resources.
  • Subcarrier spacing In the OFDM system, the spacing value between the center positions or peak positions of two adjacent subcarriers in the frequency domain.
  • the subcarrier spacing in the LTE system is 15kHz
  • the subcarrier spacing in the NR system in 5G can be 15kHz, or 30kHz, or 60kHz, or 120kHz, etc.
  • Resource block N consecutive subcarriers in the frequency domain can be referred to as a resource block.
  • one resource block in the LTE system includes 12 subcarriers
  • one resource block in the NR system in 5G also includes 12 subcarriers.
  • the number of subcarriers included in a resource block may also be other values.
  • Time slot a time unit of a certain length.
  • a time slot in the 5G NR system includes 14 OFDM symbols.
  • the length of the time slot corresponding to the 15kHz subcarrier interval is 1ms, and the time slot corresponding to the 30kHz subcarrier interval is 0.5ms.
  • Subframe a time unit of a certain length.
  • the time length of a subframe in a 5G NR system is 1ms.
  • OFDM symbol the smallest time unit in the time domain in the OFDM system.
  • Time-frequency resource unit the smallest resource granularity in the OFDM system, with one OFDM symbol in the time domain and one subcarrier in the frequency domain.
  • the method and apparatus provided by the embodiments of the present invention can be applied to a terminal device or a network device.
  • the terminal device or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer .
  • the hardware layer includes hardware such as central processing unit (CPU), memory management unit (Memory Management Unit, MMU), and memory (also called main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiment of the present invention does not specifically limit the specific structure of the execution body of the method provided by the embodiment of the present invention, as long as it can be provided according to the embodiment of the present invention by running a program that records the code of the method provided by the embodiment of the present invention.
  • the execution subject of the method provided in the embodiment of the present invention may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.
  • various aspects or features of the embodiments of the present invention may be implemented as methods, devices, or products using standard programming and/or engineering techniques.
  • article of manufacture used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium.
  • computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks or tapes, etc.), optical disks (for example, compact discs (Compact Disc, CD), digital versatile discs (Digital Versatile Disc, DVD)) Etc.), smart cards and flash memory devices (for example, Erasable Programmable Read-Only Memory (EPROM), cards, sticks or key drives, etc.).
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • FIGs 3a, 3b, 4a, 4b, 5a and Figure 5b are schematic diagrams of a wireless communication system according to an embodiment of the present invention.
  • the wireless communication system includes a network device and a terminal device. There are downlink data transmission and uplink data transmission between the network device and the terminal device, and the network device can communicate with multiple terminal devices.
  • the terminal device and the network device may use two or more uplink carriers for uplink communication.
  • the terminal equipment can use the SUL carrier and the TDD carrier for uplink communication with the network equipment.
  • the network device includes a processor and a receiver, and the terminal device includes a transmitter and a processor.
  • the terminal device sends uplink data to the network device through the transmitter, and the network device receives the uplink data through the receiver.
  • the transmitter and receiver here can also be referred to as transceivers, and can be one antenna or multiple antennas.
  • the terminal device works in a dual connection mode of LTE and NR, that is, the terminal device is simultaneously connected to the LTE network device and the NR network device.
  • Network equipment includes LTE network equipment and NR network equipment.
  • LTE network equipment and NR network equipment can be deployed on the same site.
  • LTE network equipment and NR network equipment can share the same set of hardware equipment or use different hardware equipment.
  • the network equipment includes: an LTE processor, an NR processor, and a transceiver.
  • the terminal equipment includes: LTE processor, NR processor and transceiver.
  • LTE network equipment and NR network equipment can also be deployed on different sites.
  • the network equipment may include an LTE network equipment and an NR network equipment, where the LTE network equipment includes a processor and a transceiver.
  • NR network equipment includes: processor and transceiver.
  • the terminal equipment includes: LTE processor, NR processor and transceiver.
  • the network device transmits information to the terminal device through the forward link (also referred to as the downlink), and receives information from the terminal device through the reverse link (also referred to as the uplink).
  • the forward link and the reverse link may use different frequency bands.
  • TDD Time Division Duplex
  • Full Duplex Full Duplex
  • a physical channel is specifically used for the transmission of data information and/or control information.
  • the physical channel includes one or a combination of the following: PUSCH (physical uplink shared channel, PUSCH, physical uplink shared channel) , PUCCH (physical uplink control channel), PDCCH (Physical Downlink Control Channel, physical downlink control channel), EPDCCH (Enhanced-Physical Downlink Control Channel, enhanced physical downlink control channel), PCFICH (Physical Control Format Indicator) Channel, physical control format indicator channel), PHICH (Physical hybrid ARQ indicator channel, physical hybrid retransmission indicator channel), PDSCH (Physical Downlink Shared Channel, physical downlink shared channel), etc., or the newly introduced functions in the standard are the same, but Channels with different names, such as control channels or data channels introduced in short TTI transmission.
  • data packets are encoded and modulated and then mapped to physical resources in the order of frequency first; in the uplink data transmission in the prior art, data packets are encoded and modulated and then Arrange the virtual resources in the order of time and frequency, and then perform DFT modulation on a symbol corresponding to each virtual resource and map it to the physical resource corresponding to the symbol.
  • the specific scheduling process in the wireless communication system is that the terminal device receives the control channel (such as PDCCH or other control channel) sent by the network device, and the control channel can carry the scheduling of the transmission block in the data channel (such as PDSCH or PUSCH or other data channel) Information, the scheduling information includes, for example, control information such as resource allocation information of the data channel carrying the transport block, and modulation and coding mode.
  • the terminal device receives or transmits the data channel according to the above-mentioned control information carried in the detected control channel.
  • the time period in this application refers to a continuous period of time, which may include one or more time slots, or one or more symbols.
  • an embodiment of the communication method provided by the present application is used to receive a downlink signal, and the method includes:
  • the network device sends first downlink control information to the terminal device, where the first downlink control information instructs the terminal device to receive the first downlink control information from the network device during the first time period on the first downlink carrier or the second downlink carrier. Line signal.
  • the terminal device may receive the first downlink control information at the first moment.
  • the start time of the first time period is before the start time of the second time period and after the end time of the third time period
  • the second time period is used for the terminal equipment to be on the second uplink carrier Sending a first uplink signal to the network device
  • the third time period is used by the terminal device to send a second uplink signal to the network device on the first uplink carrier. That is, before sending the first downlink control information, the network device has scheduled the terminal device to send the first uplink signal and the second uplink signal.
  • the first time period may be one or more time slots, or one or more symbols.
  • the first uplink signal or the second uplink signal may be PUSCH (Physical uplink shared channel), PUCCH (Physical uplink control channel, uplink control channel), SRS (Sounding reference signal, sounding reference signal) ) And PRACH (Physical Random Access Channel).
  • PUSCH Physical uplink shared channel
  • PUCCH Physical uplink control channel, uplink control channel
  • SRS Sounding reference signal, sounding reference signal
  • PRACH Physical Random Access Channel
  • the first downlink signal may be PDSCH (physical downlink shared channel) or CSI-RS (channel state information-reference signal, channel state information reference signal).
  • the first downlink control information is control information used for downlink data scheduling.
  • the first downlink control information may be control information used for downlink data scheduling or uplink data scheduling, and the control information includes information used to trigger terminal equipment to receive CSI-RS. Indicates the field.
  • the first downlink carrier is a downlink carrier in FDD carriers. It should be understood that if the first downlink control information indicates that the terminal device receives the first downlink signal from the network device in the first time period on the second downlink carrier, it can always receive the first downlink signal.
  • the terminal device determines whether to receive the first downlink signal from the network device according to the first time period.
  • the terminal device may determine whether to determine whether to receive the first downlink signal from the network device according to the length of time and the first time period.
  • the time length includes the time for the antenna switching of the terminal device, which may include one or more time slots, or one or more symbols. It should be noted that the time length in this application is not limited to the time for the terminal device to perform antenna switching, and the time length may also be a time period greater than the specific time for the terminal device to perform antenna switching. For example, the specific time for the terminal device to switch antennas is 35 us, and the time length can be 35 us, or a time period greater than 35 us, such as one symbol or multiple symbols.
  • this application does not limit the name of the time length, which can be represented by other names, such as switching time, switching time, processing time, frequency adjustment time, etc., or abstractly expressed as a time period.
  • the length of time includes the time for antenna switching of the terminal device, and can be replaced by the length of time including the processing time of the terminal device, or the length of time includes the switching time of the terminal device, etc. .
  • the antenna switching in this application includes adjusting the antenna of the terminal device from working at the first frequency to working at the second frequency.
  • Determining whether to receive the first downlink signal from the network device may include: determining to receive the first downlink signal from the network device, or determining to receive part of the first downlink signal from the network device, or determining not to receive the first downlink signal. The first downlink signal.
  • step S602 can be replaced by the following steps:
  • the terminal device determines, according to the first time period, to receive at least one symbol corresponding to a time that does not overlap the time length in the first downlink signal from the network device.
  • the terminal device does not receive a part of the signal corresponding to the time that overlaps the time length in the first downlink signal.
  • the terminal device determines whether to receive the downlink signal according to the downlink signal to be received, so that the network device can schedule the terminal device to receive the downlink signal at a time position not used for antenna switching, which improves the utilization of communication resources.
  • the terminal device determining whether to receive the first downlink signal from the network device may include:
  • the terminal device determines to receive the first downlink signal from the network device, and the time length includes the time when the terminal device antenna is switched; or
  • the terminal device determines not to receive the first downlink signal.
  • the terminal device determines to receive at least one symbol of the first downlink signal in a time other than the overlap time in the first time period.
  • the overlap between the first time period and the time length means that the first time period and the time length include at least one same time unit in the time domain.
  • the absence of overlap between the first time period and the time length means that the first time period and the time length do not include the same time unit in the time domain.
  • the time unit can be a time slot, a symbol, or a subframe.
  • the first time period and time length contain at least one same time unit in the time domain, which means that the two overlap. If the first time period and time length do not contain the same time unit in the time domain, it means that the two do not overlap.
  • the method further includes: the terminal device sends capability information to the network device, where the capability information is used to indicate whether the terminal device can send the first downlink signal when the first time period overlaps with the time length. Part of the signal that does not overlap with the length of time.
  • the network device will receive the capability information sent by the terminal device, so as to determine whether the terminal device can send the part of the first downlink signal that does not overlap the time length when the first time period overlaps the time length according to the capability information .
  • the terminal device may have multiple implementation manners for determining whether to receive the first downlink signal from the network device.
  • Manner 1 The terminal device determines whether to receive the first downlink signal according to whether the time difference between the end time of the first time period and the start time of the second time period is less than the length of time.
  • the The terminal device receives the first downlink signal from the network device; if the first time difference between the end time of the first time period and the start time of the second time period is less than the length of time, the terminal device The first downlink signal is not received.
  • the terminal device receives from the network device First downlink signal; if the first time difference between the end time of the first time period and the start time of the second time period is less than the length of time, the terminal device does not receive the first downlink signal The part of the signal corresponding to the time that overlaps with the time length is received, but the part of the signal that corresponds to the time that does not overlap the time length in the first downlink signal is received.
  • the terminal device determines whether to receive the first downlink signal according to whether the time difference between the start time of the first time period and the end time of the third time period is less than the length of time.
  • the The terminal device receives the first downlink signal from the network device; if the second time difference between the start time of the first time period and the end time of the third time period is less than the length of time, the terminal device The first downlink signal is not received.
  • the terminal device receives from the network device First downlink signal; if the second time difference between the start time of the first time period and the end time of the third time period is less than the length of time, the terminal device does not receive the first downlink signal The part of the signal corresponding to the time that overlaps with the time length is received, but the part of the signal that corresponds to the time that does not overlap the time length in the first downlink signal is received.
  • Manner 3 The terminal device according to whether the first time difference between the end time of the first time period and the start time of the second time period is less than a predetermined time length, and whether the start time of the first time period is compared with the first time period Whether the second time difference between the ending moments of the three time periods is less than the predetermined time length is used to determine whether to receive the first downlink signal.
  • the terminal device receives the first downlink signal from the network device; if both the first time difference and the second time difference are less than the time length, the terminal device does not receive the first downlink signal.
  • the terminal device receives the first downlink signal from the network device; if the first time difference and the second time difference are both Is less than the time length, the terminal device does not receive the part of the signal corresponding to the time that overlaps the time length in the first downlink signal, but receives the part of the signal that corresponds to the time that does not overlap the time length in the first downlink signal .
  • the terminal device can determine whether to receive the downlink signal according to the time position of the uplink signal to be sent and the downlink signal to be received, so that the network device can schedule the terminal device to receive the downlink signal at a time position that is not used for antenna switching. So as to ensure the downlink transmission.
  • the terminal device When determining whether to receive the first downlink signal from the network device, the terminal device needs to consider the time domain position of the time length, the time length length, and the first time period. Among them, the position of the time length may refer to the start time or the end time of the time length.
  • the time domain position of the time length and the time length length are pre-configured, for example, it can be pre-defined through a protocol or statically configured.
  • the end time of the time length is before the start time of the second time period, it is determined whether to receive the first downlink signal according to the above-mentioned method 1.
  • the start time of the time length is after the end time of the third time period, it is determined whether the tube receives the first downlink signal according to the second method.
  • the start time of the time length is located at any time between the second time period and the third time period, it is determined whether to receive the first downlink signal according to the third manner.
  • the terminal device can confirm whether to receive the first downlink signal according to the pre-configured time length.
  • the time domain position and the time length of the time length may be determined by the terminal device according to some information.
  • the network device may notify the terminal device of the length of time in an explicit or invisible manner.
  • an embodiment of the terminal device determining the time length includes:
  • the network device sends first indication information to the terminal device, where the first indication information indicates a first downlink resource, and the first downlink resource is used to carry the first type of downlink signal sent by the network device .
  • the terminal device successfully receives the first indication information at the second time.
  • the first type of downlink signal includes one or more of synchronization signal and PBCH block (SSB), CSI-RS, and PDSCH.
  • SSB PBCH block
  • CSI-RS CSI-RS
  • PDSCH PDSCH
  • the first indication information is DCI used to schedule the PDSCH.
  • Step S1101 can be replaced by the following steps:
  • the terminal device determines a first downlink resource, where the first downlink resource is used to carry the first type of downlink signal sent by the network device.
  • the first type of downlink signal includes one or more of synchronization signal and PBCH block (SSB), CSI-RS, and PDSCH.
  • SSB PBCH block
  • CSI-RS CSI-RS
  • PDSCH PDSCH
  • the terminal device determines the time length according to the first downlink resource.
  • the time length includes the time period used by the terminal device for antenna switching.
  • the time length and the time period corresponding to the first downlink resource do not overlap in time, and the end time of the time length is earlier than the start time of the second time period, and the start time of the time length is later
  • the second time period is used for the terminal device to send the first uplink signal to the network device on the second uplink carrier
  • the third time period is used for the terminal The device sends a second uplink signal on the first uplink carrier to the network device.
  • the network device before sending the first indication information, the network device has scheduled the terminal device to send the first uplink signal and the second uplink signal.
  • the time length determined by the terminal device has no overlapping time unit with the first uplink signal, the second uplink signal, and the first downlink resource that have been scheduled.
  • the downlink reception will be interrupted during the time length, so that the terminal device can determine the time length according to the location of the first downlink resource, so that the time length does not overlap with the first downlink resource in time, so as to avoid affecting the reception of the terminal equipment.
  • the downlink signal carried on the first downlink resource.
  • the terminal device determines the time length for uplink antenna switching.
  • the time length does not overlap with the first downlink resource in time, and the time length determined by the terminal device can avoid important downlink signals such as SSB. Ensure the normal reception of important downlink signals.
  • an embodiment of an uplink signal sending method includes:
  • the network device sends second downlink control information to the terminal device, where the second downlink control information instructs the terminal device to send a third uplink signal to the network device in a fourth time period on the first uplink carrier or the second uplink carrier;
  • the terminal device receives the second downlink control information.
  • the terminal device determines whether to send the third uplink signal to the network device according to the fourth time period.
  • the terminal device may determine whether to receive the first downlink signal from the network device according to the length of time and the length of time.
  • Determining whether to receive the first downlink signal from the network device may include: determining to send the third uplink signal to the network device, or determining to send a part of the third uplink signal to the network device, or determining not to send the first downlink signal. Three upstream signals.
  • the terminal device sends the third uplink signal. If the fourth time period and the time length overlap in time, the terminal device does not send the third uplink signal, or does not send the third uplink signal in time with the first time period. There are overlapping partial signals.
  • the fourth time period and the time length overlap in time, which means that the end time of the fourth time period is later than the start time of the time length, or the start time of the fourth time period is earlier than the end time of the time length.
  • the third uplink signal may correspond to the first uplink carrier or the second uplink carrier.
  • the terminal device determines whether to send the uplink signal according to the time period of the uplink signal to be sent and the length of time for antenna switching, so that the network device can schedule the terminal device to send the uplink signal at a time position that is not used for antenna switching. , Improve the utilization of communication resources.
  • embodiments provided in this application further include:
  • the network device determines the first time period for sending the first downlink signal to the terminal device;
  • the network device jointly determines the first time period for sending the first downlink signal to the terminal device according to the communication requirements of all the terminal devices in the cell and all the communication resources of the cell.
  • the network device may determine the first time period based on the time length of the terminal device and the scheduled uplink signal transmission time.
  • the determination principle of the first time period is similar to the determination method of the terminal device described above.
  • the present application also provides a communication device, and the specific implementation of the communication device can refer to the foregoing method flow.
  • a communication device 1400 includes:
  • the receiving unit (1401) is configured to receive first downlink control information from a network device, where the first downlink control information instructs the terminal device to receive the first downlink control information from the network device in the first time period of the first downlink carrier A downlink signal, the start time of the first time period is before the start time of the second time period, and after the end time of the third time period, the second time period is used by the terminal device Sending a first uplink signal to the network device on a second uplink carrier, and the third time period is used by the terminal device to send a second uplink signal to the network device on the first uplink carrier;
  • the processing unit (1402) determines whether to receive the first downlink signal from the network device according to the first time period.
  • the processor is used to:
  • the second time difference between the start time of the first time period and the end time of the third time period is not less than the time length, it is determined to receive the first downlink from the network device Signal;
  • the first time difference between the end time of the first time period and the start time of the second time period, and the difference between the start time of the first time period and the end time of the third time period If at least one of the second time differences between the two is not less than the time length, determine to receive the first downlink signal from the network device;
  • the length of time includes the time of antenna switching of the terminal device.
  • the processor is used to:
  • the first time difference between the end time of the first time period and the start time of the second time period is less than the length of time, it is determined to receive the first downlink signal from the network device In the first symbol, the end time of the time period occupied by the first symbol is before the start time of the second time period, and the end time of the time period occupied by the first symbol is the same as the end time of the second time period.
  • the time difference between the start time of the time period is not less than the time length; or
  • the second time difference between the start time of the first time period and the end time of the third time period is less than the length of time, it is determined to receive the first downlink signal from the network device Wherein the start time of the time period occupied by the second symbol is after the end time of the third time period, and the start time of the time period occupied by the second symbol is in the After the end of the third time period; or
  • the first time difference between the end time of the first time period and the start time of the second time period, and the difference between the start time of the first time period and the end time of the third time period In the case where the second time difference is less than the first time difference, it is determined to receive the third symbol in the first downlink signal from the network device, where the end time of the time period occupied by the third symbol Before the start time of the second time period, and the time difference between the end time of the time period occupied by the first symbol and the start time of the second time period is not less than the time length, or the first time period
  • the start time of the time period occupied by the three symbols is after the end time of the third time period
  • the start time of the time period occupied by the second symbol is after the end time of the third time period;
  • the length of time includes the time of antenna switching of the terminal device.
  • the processor is used to:
  • the first time difference between the end time of the first time period and the start time of the second time period is less than the time length, it is determined not to receive the first downlink signal;
  • the second time difference between the start time of the first time period and the end time of the third time period is less than the time length, it is determined not to receive the first downlink signal;
  • the length of time includes the time of antenna switching of the terminal device.
  • the receiving unit is further configured to receive first indication information from a network device, where the first indication information indicates a first downlink resource, and the first downlink resource is used to carry the The first type of downlink signal sent by the network device;
  • the processing unit is further configured to determine a time length according to the first downlink resource, the time length and the time period corresponding to the first downlink resource do not overlap in time, and the start of the time length The time is later than the end time of the second time period, and the end time of the time length is earlier than the start time of the third time period;
  • the length of time includes the time of antenna switching of the terminal device.
  • the receiving unit is further configured to receive second downlink control information from the network device, where the second downlink control information indicates the fourth time period of the terminal device on the first uplink carrier or the second uplink carrier Sending a third uplink signal to the network device;
  • the processing unit is further configured to determine whether to send the third uplink signal to the network device according to the fourth time period and time length.
  • the communication device may be a chip system or a terminal device.
  • the hardware element of the foregoing receiving unit may be a receiver or a transceiver
  • the hardware element of the foregoing processing unit may be a processor, for example, the receiver and the processor in FIG. 15.
  • the relevant content of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here.
  • the communication device may be presented in the form of dividing various functional modules in an integrated manner.
  • the "module” here may refer to a specific ASIC, a circuit, a processor and storage device that executes one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • the communication device may include: a memory, a processor, and a communication interface.
  • the memory is used to store instructions.
  • the processor executes the instructions stored in the memory, so that the device executes the information notification method provided in the embodiments of the present application.
  • the memory may also be included in the processor.
  • the communication interface may be a circuit, a device, an interface, a bus, a software module, a transceiver, or any other device that can realize communication.
  • the processor can be a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU) ), network processor (NP), digital signal processing circuit (digital signal processor, DSP), microcontroller (microcontroller unit, MCU), programmable controller (programmable logic device, PLD) or Other integrated chips.
  • the memory 701 includes a volatile memory (volatile memory), such as a random-access memory (random-access memory, RAM); the memory may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory) , Hard disk drive (HDD) or solid-state drive (solid-state drive, SSD); memory can also include a combination of the above types of memory; memory can also include any other device with storage functions, such as circuits, devices, or software Module.
  • volatile memory such as a random-access memory (random-access memory, RAM)
  • non-volatile memory such as a flash memory (flash memory) , Hard disk drive (HDD) or solid-state drive (solid-state drive, SSD)
  • flash memory flash memory
  • HDD Hard disk drive
  • SSD solid-state drive
  • memory can also include a combination of the above types of memory
  • memory can also include any other device with storage functions, such as circuits, devices, or software Module.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • 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 integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de communication. Le procédé comprend : la réception, par un dispositif de terminal, de premières informations de commande de liaison descendante depuis un dispositif de réseau, les premières informations de commande de liaison descendante ordonnant au dispositif de terminal de recevoir, depuis le dispositif de réseau, un premier signal de liaison descendante dans une première période de temps d'une première porteuse de liaison descendante, l'instant de début de la première période de temps étant antérieur à l'instant de début d'une deuxième période de temps et ultérieur à l'instant de fin d'une troisième période de temps, la deuxième période de temps étant utilisée pour que le dispositif de terminal envoie, sur une seconde porteuse de liaison montante, un premier signal de liaison montante au dispositif de réseau, et la troisième période de temps étant utilisée pour que le dispositif de terminal envoie, sur une première porteuse de liaison montante, un second signal de liaison montante au dispositif de réseau ; et le fait de déterminer, selon la première période de temps, s'il faut recevoir le premier signal de liaison descendante depuis le dispositif de réseau.
PCT/CN2021/085849 2020-04-07 2021-04-07 Procédé et appareil de communication WO2021204169A1 (fr)

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CN202010266838.0A CN113498186A (zh) 2020-04-07 2020-04-07 一种通信方法和装置

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Citations (2)

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Publication number Priority date Publication date Assignee Title
WO2013116988A1 (fr) * 2012-02-07 2013-08-15 Nokia Corporation Procédé et appareil destinés à la remise d'un compte rendu sur l'état d'un tampon et à la gestion de l'état de ce tampon pour un équipement utilisateur fonctionnant en mode d'agrégation de porteuses inter-site
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