WO2020155168A1 - Procédé de communication sans fil pour spectre sans licence, dispositif réseau et dispositif terminal - Google Patents

Procédé de communication sans fil pour spectre sans licence, dispositif réseau et dispositif terminal Download PDF

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Publication number
WO2020155168A1
WO2020155168A1 PCT/CN2019/074662 CN2019074662W WO2020155168A1 WO 2020155168 A1 WO2020155168 A1 WO 2020155168A1 CN 2019074662 W CN2019074662 W CN 2019074662W WO 2020155168 A1 WO2020155168 A1 WO 2020155168A1
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WIPO (PCT)
Prior art keywords
channel
downlink data
downlink control
control channel
symbols
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PCT/CN2019/074662
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English (en)
Chinese (zh)
Inventor
石聪
吴作敏
贺传峰
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Oppo广东移动通信有限公司
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Priority to PCT/CN2019/074662 priority Critical patent/WO2020155168A1/fr
Priority to CN201980074072.1A priority patent/CN113170324B/zh
Publication of WO2020155168A1 publication Critical patent/WO2020155168A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and specifically relate to a wireless communication method, network equipment, and terminal equipment.
  • Unlicensed spectrum is a spectrum that can be used for radio equipment communications divided by countries and regions. This spectrum is usually considered to be a shared spectrum, that is, communication equipment in different communication systems meets the regulatory requirements set by the country or region on the spectrum, and can use the spectrum. For spectrum, there is no need to apply for a proprietary spectrum authorization from the government.
  • the embodiments of the application provide a wireless communication method, network equipment, and terminal equipment for unlicensed spectrum, which can realize the transmission of downlink channels on the unlicensed spectrum, and can reduce the processing burden of network equipment and reduce the blindness of terminal equipment. Detection overhead.
  • a wireless communication method for unlicensed spectrum including: performing channel monitoring according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot; when the channel is detected to be idle To send the first downlink control channel and the first downlink data channel that schedule the first downlink data channel.
  • a wireless communication method for unlicensed spectrum including: detecting a first downlink control channel in a time slot; wherein, detecting the first downlink control channel in the time slot The position of is determined according to: the number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot; in the case of detecting the first downlink control channel, In the time slot, obtain the first downlink data channel scheduled by the first downlink control channel.
  • a wireless communication method for unlicensed spectrum which includes: based on at least one candidate time domain position configured to a terminal device in a time slot, channel detection is performed sequentially until the channel is detected to be idle; In the case where the channel is detected to be idle at the first candidate time domain position, starting from the first candidate time domain position, the first downlink control channel and the first downlink data channel scheduled by the first downlink control channel are sent.
  • a wireless communication method for unlicensed spectrum includes: sequentially detecting a first downlink control channel at at least one candidate time domain position configured by a network device in a time slot until The first downlink control channel is detected; if the first downlink control channel is detected, the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot .
  • a network device for executing the method in the first or third aspect.
  • the network device includes a functional module for executing the method in the first or third aspect.
  • a terminal device for executing the method in the above second or fourth aspect.
  • the terminal device includes a functional module for executing the method in the second or fourth aspect.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the first or third aspect.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second or fourth aspect.
  • a chip is provided for implementing the method in the first or third aspect.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the first or third aspect.
  • a chip is provided for implementing the method in the second or fourth aspect.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the second or fourth aspect.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the first or third aspect.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the second or fourth aspect.
  • a computer program product including computer program instructions that cause a computer to execute the method in the first or third aspect.
  • a computer program product including computer program instructions, which cause a computer to execute the method in the second or fourth aspect.
  • a computer program which when running on a computer, causes the computer to execute the method in the first or third aspect.
  • a computer program which, when run on a computer, causes the computer to execute the method in the second or fourth aspect.
  • the control channel and the first downlink data channel can prevent the network equipment from performing channel monitoring operations on all symbols in the time slot, and because the position of the channel monitoring is related to the number of symbols occupied by the transmitted downlink data channel Therefore, it can avoid that the network equipment needs to prepare more downlink data due to the uncertainty of the location where the channel listening is successful, and it can avoid the uncertainty of the location occupied by the first downlink control channel, which requires the terminal device to respond to the
  • the first downlink control channel performs more times of blind detection, thereby reducing the processing burden of the network device and reducing the overhead of the blind detection of the terminal device.
  • the network device may be configured to blindly detect the candidate time domain position of the downlink control channel, thereby making the blind detection of the downlink control channel more flexible. If more candidate time domain positions are needed, more candidate time domain positions can be configured, which enables the terminal device to blindly detect the downlink control channel at more candidate time domain positions, thereby increasing the probability of channel use.
  • Fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a partial time slot provided by an embodiment of the present application.
  • Fig. 3 is a schematic flowchart of a wireless communication method for unlicensed spectrum provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of sending a physical downlink shared channel (PDSCH) on an unlicensed spectrum according to an embodiment of the present application.
  • PDSCH physical downlink shared channel
  • Fig. 5 is a schematic diagram of transmitting PDSCH and occupying signals on an unlicensed spectrum provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a wireless communication method for unlicensed spectrum provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of candidate time domain positions in a time slot provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of transmitting a PDSCH on an unlicensed spectrum provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of transmitting PDSCH and reference signals on an unlicensed spectrum provided by an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a network device provided by an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a communication system provided by an embodiment of the present application.
  • 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
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • LTE-A Advanced long term evolution
  • NR New Radio
  • NR NR system evolution system
  • LTE on unlicensed frequency bands LTE-based access to unlicensed spectrum, LTE-U
  • NR NR-based access to unlicensed spectrum, NR-U
  • UMTS Universal Mobile Telecommunication System
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • WiMAX Wireless Local Area Networks
  • WLAN Wireless Fidelity
  • WiFi next-generation communication systems or other communication systems, etc.
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC machine type communication
  • V2V vehicle to vehicle
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or a terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network side devices in 5G networks, or network devices in the future evolution of Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNB evolved base station
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridge
  • the communication system 100 further includes at least one terminal device 120 located within the coverage area of the network device 110.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device set to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Line
  • WLAN wireless local area networks
  • IoT Internet of Things
  • a terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellites or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio phone transceivers Electronic device.
  • PCS Personal Communications System
  • GPS Global Positioning System
  • Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device.
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • Figure 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 having a communication function and a terminal device 120.
  • the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities, and other network entities, which are not limited in the embodiment of the present application.
  • the method of the embodiment of the present application can be applied to communication of unlicensed spectrum.
  • Unlicensed spectrum is the spectrum that can be used for radio equipment communication divided by the country and region. This spectrum can be considered as a shared spectrum, that is, communication devices in different communication systems can meet the regulatory requirements set by the country or region on the spectrum. To use this spectrum, it is not necessary to apply for a proprietary spectrum authorization from the government.
  • LBT Listen Before Talk
  • communication devices can follow the principle of Listen Before Talk (LBT) when communicating on unlicensed spectrum, that is, Before the communication device transmits signals on the channel of the unlicensed spectrum, it needs to perform channel detection (or called channel detection).
  • LBT Listen Before Talk
  • the communication device can Signal transmission; if the communication device performs channel sensing on the unlicensed spectrum and the result is that the channel is busy (for example, LBT fails or fails), signal transmission cannot be performed.
  • the bandwidth of the LBT is 20 MHz, or an integer multiple of 20 MHz.
  • the maximum channel occupation time can refer to the maximum length of time allowed to use unlicensed spectrum channels for signal transmission after successful LBT. There are different MCOTs under different channel access schemes. The maximum value of MCOT may be 10 ms, for example. It should be understood that the MCOT is the time occupied by signal transmission.
  • Channel Occupancy Time may refer to the length of time for signal transmission using a channel of an unlicensed spectrum after the LBT is successful, and the signal occupation of the channel may be discontinuous within this time length.
  • one COT may optionally not exceed, for example, 20 ms at the longest, and the length of time occupied by signal transmission in the COT does not exceed MCOT.
  • the working scenario in which NR works on an unlicensed frequency band may include the following working scenarios:
  • Scenario 1 Carrier aggregation scenario, where, in this scenario, the primary cell (Primary Cell, PCell) works on the licensed spectrum, and the secondary cell (Secondary Cell, SCell) aggregates and works on the unlicensed spectrum through carrier aggregation;
  • Primary Cell Primary Cell
  • Secondary Cell Secondary Cell
  • Scenario 2 Dual-connection working scenario, in which, in this scenario, the PCell works on the LTE licensed spectrum, and the primary and secondary cells (Primary Scell, PScell) work on the NR unlicensed spectrum;
  • Scenario 3 independent work scenario, in which, in this scenario, NR works as an independent cell in unlicensed spectrum
  • the working frequency band (Band) of NR-U can usually be 5GHz unlicensed spectrum and 6GHz unlicensed spectrum, (for example, 5925-7125MHz in the United States, or 5925-6425MHz in Europe, or part of it); on the unlicensed spectrum, NR can be guaranteed -The fairness between the U system and other systems already working on these unlicensed spectrums, such as wireless fidelity (WiFi), etc.
  • WiFi wireless fidelity
  • the principle of fairness is that the impact of NR-U on systems that have been deployed on unlicensed spectrum (for example, WiFi) does not exceed the impact between these systems.
  • energy detection can be used as a basic coexistence mechanism, and the energy detection mechanism can be the aforementioned LBT mechanism.
  • LBT may pass any symbol in a time slot
  • some time slots may appear (at least when the channel is preempted for the first time).
  • Part of the time slot means that the number of symbols available in the time slot is small.
  • the general network equipment Since it takes a certain amount of time for the network equipment to prepare the downlink data, the general network equipment has already prepared the data before LBT.
  • the network device does not know which Orthogonal Frequency Division Multiplexing (OFDM) symbol the channel obtains the channel in, it does not know how many OFDM is available in some time slots when preparing the data. Symbols, so it is often possible to prepare multiple copies of different data to apply different possibilities.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the worst case for network equipment is to prepare 7 PDSCHs with a length of 2 OFDM symbols. If the channel is obtained at symbol #6, 4 data can be transmitted (this It is assumed that the Physical Downlink Control Channel (PDCCH) and the PDSCH are frequency division multiplexed). This method requires the network equipment to prepare more data, and the blind detection overhead of the UE is also relatively large.
  • PDCH Physical Downlink Control Channel
  • the embodiments of the present application provide the following methods, which can prevent the network device from preparing more data, reduce the processing burden of the network device, and can reduce the blind detection overhead of the terminal device.
  • FIG. 3 is a schematic flowchart of a wireless communication method 200 for unlicensed spectrum according to an embodiment of the present application.
  • the method 200 includes at least part of the following content.
  • the network device performs channel monitoring according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot.
  • the downlink data channel mentioned in the embodiment of this application may be PDSCH
  • the downlink control channel mentioned in the embodiment of this application may be PDSCH
  • the time slot occupied by one downlink data channel is one time slot, that is, one downlink data channel does not cross the time slot.
  • the time slot occupied by one downlink control channel is one time slot, that is, one downlink control channel does not cross the time slot.
  • the time slot occupied by a downlink control channel and its scheduled downlink data channel is a time slot, that is, a downlink control channel and its scheduled downlink data channel do not cross time slots .
  • the first downlink data channel in the embodiment of the present application may be prepared in advance, for example, it may be prepared in the process of performing LBT, or prepared before performing LBT.
  • the number of symbols occupied by the downlink data channel can be fixed.
  • the number of symbols occupied by the downlink data channel can be fixed according to the service currently transmitted by the terminal device, the processing capability of the terminal device, and the current network conditions. Number of symbols.
  • the number of symbols occupied by the downlink data channel may be configured by the network device to the terminal device, for example, it may be configured through RRC signaling, or may also be configured through other signaling.
  • the number of symbols occupied by the downlink data channel may be semi-statically configured, that is, may be changed.
  • the number of symbols occupied by the downlink data channel may be 7; for example, the number of symbols occupied by the downlink data channel may be 2, 4 or 7, etc.
  • the allocation method of the downlink data channel in the time domain in the embodiment of the present application may be a type A (typeA) allocation method (also called a scheduling method), or a type B (typeB) allocation method .
  • typeA type A
  • typeB type B allocation method
  • the start symbol S of the PDSCH of TypeA can be ⁇ 0, 1, 2, 3 ⁇ , and the length L can be ⁇ 3,..., 14 ⁇ symbols.
  • the PDSCH start symbol S can be ⁇ 0,...,12 ⁇ , and the length L can be ⁇ 2,4,7 ⁇ .
  • the PDSCH scheduling mode of TypeA can be understood as a slot-based scheduling mode, because there is only one PDSCH transmission in a slot.
  • the scheduling method of TypeB PDSCH can be understood as a scheduling method based on mini-slots, because there can be multiple PDSCH scheduling in one time slot.
  • the network device when it schedules the downlink data transmission of the terminal device, it may carry a Time Domain Resource Allocation (TDRA) field in the Downlink Control Information (DCI), and the TDRA field may be 4 bits can indicate 16 different rows in a resource allocation table, and each row can contain different resource allocation combinations, such as the starting position S of the PDSCH, the length L, and different scheduling types (typeA or typeB).
  • TDRA Time Domain Resource Allocation
  • DCI Downlink Control Information
  • the resource allocation table may also be different.
  • this table can be configured by RRC.
  • the terminal device can obtain a PDSCH-TimeDomainResourceAllocation in the table of the RRC configuration according to the indication of the TDRA domain in the DCI, and this information includes K0 (that is, the time slot between the PDCCH and the PDSCH), the mapping type ( That is, TypeA and TypeB mentioned above) and start symbol and length (startSymbolAndLength) (S and L can be calculated based on this parameter, so that the position of PDSCH in the time domain can be known).
  • K0 that is, the time slot between the PDCCH and the PDSCH
  • the mapping type That is, TypeA and TypeB mentioned above
  • start symbol and length startSymbolAndLength
  • the network device may determine the symbol position for performing the channel monitoring according to the number of symbols occupied by the first downlink data channel; according to the determined symbol position, perform the Channel monitoring.
  • the first downlink data channel and the first downlink control channel for scheduling the first downlink data channel are frequency division multiplexed, it may be based on the occupation of the first downlink data channel.
  • the number of symbols occupied by the first downlink control channel does not need to be considered (it is assumed that the number of symbols occupied by the first downlink control channel is less than the number of symbols occupied by the first downlink data channel).
  • the index of the symbols in a time slot is from 0 to 13
  • the downlink data channel with the number of symbols of 7 needs to be sent out in a time slot .
  • At least the symbol at index 7 needs to be idle, that is, frame listening needs to be performed before the symbol with index 7, for example, channel listening can be performed in sequence based on symbols #0-7, which is the result of listening It is expected that one of the symbols indexed #0-7 is the start symbol of the idle channel.
  • the first downlink data channel and the first downlink control channel for scheduling the first downlink data channel are time-division multiplexed, it can be based on the occupation of the first downlink data channel.
  • the number of symbols and the number of symbols occupied by the first downlink control channel perform channel sensing.
  • the number of symbols occupied by the first downlink data channel is 7
  • the number of symbols occupied by the first downlink control channel is 2
  • the index of the symbols in a slot is 0-13
  • the first downlink control channel of the first downlink data channel when performing channel sensing, not only the number of symbols occupied by the first downlink data channel, but also the first downlink control channel of the first downlink data channel may be considered.
  • the number of symbols occupied, and the positional relationship between the first downlink data channel and the first downlink control channel for example, whether there are symbols between the two
  • the multiplexing relationship for example, frequency division multiplexing or time division multiplexing) Multiplexing
  • the first downlink data channel may be the first downlink data channel that is sent after the channel detection is successful in the current time slot.
  • the network device may expect to send more than one downlink data channel in a time slot after the channel listening is successful (that is, the second mentioned second channel is also sent in the time slot).
  • Downlink data channel at this time, when performing channel sensing, the number of symbols occupied by the first downlink data channel may be based on, and the number of symbols occupied by the second downlink data channel may be further considered.
  • the number of symbols that can be occupied by the PDSCH can be 2, 4, and 7, assuming that the network device expects to transmit at least one PDSCH occupying 7 symbols, and the PDSCH and PDCCH can be frequency division multiplexed Yes, you can start sending PDCCH and/or PDSCH at any of symbols #0, 3, 5, and 7, so the network equipment expects to detect that the channel is idle in any of symbols #0, 3, 5, and 7, therefore, As shown in FIG. 4, the network device can perform channel sensing in sequence based on symbols #0, 3, 5, and 7 until it hears that the channel is free.
  • Figure 4 illustrates the frequency division multiplexing of PDSCH and PDCCH as an example. If it is assumed that PDSCH and PDCCH are time-division multiplexed, and the symbols of PDSCH and PDCCH are continuous, the above type B scheduling method is still used as an example.
  • the number of symbols that can be occupied by the PDSCH can be 2, 4, and 7. Assuming that the network device expects to transmit at least one PDSCH occupying 7 symbols, and the PDSCH and PDCCH can be frequency division multiplexed, the symbols can be used in symbols #1 and 5.
  • the PDCCH starts to be sent at one point, so the network device expects to detect that the channel is idle at any of the symbols #1 and 5.
  • the PDCCH that occupies 2 symbols for scheduling 7-symbol PDSCH and the PDSCH of 7 symbols can be sent, and the occupancy 2 symbols are sent for scheduling 2 symbols.
  • a PDCCH for scheduling a 7-symbol PDSCH and a 7-symbol PDSCH occupying 2 symbols can be transmitted.
  • the network device in addition to the position where the network device performs channel sensing based on the number of symbols occupied by the first downlink data channel, etc., it may further determine to perform channel sensing based on the number of symbols remaining in the current time slot. That is, it is necessary to ensure that the remaining number of symbols is sufficient to send a downlink data channel and its corresponding downlink control channel.
  • the number of symbols occupied by the first downlink data channel and the first downlink control channel is 7, and the number of remaining symbols is currently 10, it is necessary to perform channel sensing based on symbol 5 and symbol 7.
  • the symbol that the channel is monitored to be idle may be equal to the symbol that the channel is to be monitored to be idle is equal to the start of the symbols of the first downlink control channel and the first downlink data channel.
  • Symbols, where the symbols occupied by the first downlink data channel and the first downlink control channel mentioned here may be the symbols occupied by the two in total, and the first downlink data channel and the first downlink control channel may be frequency division Multiplexing can also be time division multiplexing.
  • the symbol #0, 3, 5 or 7 is any One can be a symbol where the channel is detected to be free, that is, from any symbol #0, 3, 5, or 7, the channel is determined to be free.
  • the symbol for which the channel is detected to be idle may be earlier than the start symbol of the symbols for transmitting the first downlink control channel and the first downlink data channel.
  • the symbol where the channel is detected to be idle may be earlier than the symbol #3, for example, the symbol #2.
  • the network in the case where it is detected that the symbol of the channel idle is earlier than the start symbol in the symbols of the first downlink data channel and the first downlink control channel, the network can monitor The idle symbol of the channel starts to the last symbol before the start symbol, and the occupying signal or reference signal is sent.
  • symbol #3 is the starting symbol for transmitting 7 symbols of PDSCH and 4 symbols of PDSCH, and when the channel is detected to be idle at symbol #2, the occupying signal can be sent at symbol 3.
  • the location where the channel detection is performed can be made more flexible. Since the channel detection is more flexible, the probability that the network device can seize the channel can be improved.
  • the reference signal mentioned in the embodiment of the present application may be a demodulation reference signal (De Modulation Reference Signal, DMRS) or a channel state information reference signal (Channel State Information Reference Signal, CSI-RS).
  • DMRS De Modulation Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • the first downlink data channel and the first downlink control channel are transmitted in the time slot, there may be a certain number of symbols remaining, and then the remaining symbols may be transmitted.
  • the second downlink control channel and the second downlink data channel and/or send reference signals and/or occupying signals.
  • the network device may determine the type and number of channels or signals to be transmitted on the remaining symbols and/or the number of symbols occupied according to the number of remaining symbols in the time slot, where the remaining symbols are After sending the remaining symbols of the first downlink control channel and the first downlink data channel in the time slot; perform downlink transmission according to the determined type, number, and/or number of symbols occupied.
  • a reference signal or a placeholder signal may be sent.
  • the number of remaining symbols can send at least one downlink data channel and its corresponding downlink control channel
  • at least one downlink data channel and its corresponding downlink control channel can be sent.
  • the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
  • At least one downlink data channel (for example, may include a first downlink data channel, and further include a second downlink data channel) and its corresponding downlink control channel are sent, the remaining symbols in the time slot If the number is not enough to send a complete downlink control channel and its scheduled downlink data channel, the reference signal can be sent.
  • the second downlink data channel is the downlink data channel that occupies the largest number of symbols among the downlink data channels that can be sent among the remaining symbols.
  • the downlink data channel with the largest number of symbols is transmitted as much as possible, that is, the PDSCH is transmitted as little as possible.
  • the first 7 symbols are used to transmit the pre-prepared PDSCH and the PDCCH frequency division multiplexed with it, then for the remaining 4 symbols, try to send one occupied Instead of sending two PDSCHs occupying 2 symbols, a 4-symbol PDSCH is not sent, thereby reducing the number of times that the terminal device blindly detects the PDCCH corresponding to the PDSCH.
  • a channel or signal to be sent on the remaining symbols is prepared.
  • the network device may prepare data for the next PDSCH in the process of transmitting the PDSCH occupying 7 symbols. For example, when the channel is obtained at symbol #3, the network device can prepare a PDSCH that occupies 4 symbols when transmitting the PDSCH that occupies 7 symbols.
  • the network device when it is detected that the channel is idle, the network device sends the first downlink control channel for scheduling the first downlink data channel and the first downlink data channel.
  • the terminal device detects the first downlink control channel in the time slot; wherein the position of the first downlink control channel in the time slot is determined according to at least one of the following: The number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot, and the current number of remaining symbols in the time slot.
  • the terminal device may perform blind detection of the first downlink control channel according to the number of symbols occupied by the first downlink data channel.
  • the terminal device can perform blind detection in sequence at symbols #0-6. And once the PDCCH is detected, the position of the next blind detection is the symbol of the previous PDCCH detected + 7 symbols.
  • the location of the terminal device blindly detecting the PDCCH may also consider at least one of the following:
  • the number of symbols occupied by the second downlink data channel the position relationship and/or multiplexing relationship between the downlink data channel and its corresponding downlink control channel, and the number of symbols remaining in the current time slot.
  • the number of symbols occupied by the first downlink data channel is 7.
  • the number of symbols occupied by the second downlink data channel is 2 or 7, where the first downlink data channel can be transmitted or not, then the terminal equipment blindly detects the PDCCH positions as symbol #0, symbol #3, symbol #5 and symbol # 7. Once the PDCCH is blindly detected at the above position, the blind detection position of the next PDCCH is at the above position + 7 symbols.
  • the terminal device may determine the position for blind detection of the first downlink control channel according to the number of remaining symbols.
  • blind detection needs to be performed based on symbol 7.
  • the terminal device may also perform blind detection based on the number of remaining symbols instead of the number occupied by the first downlink data channel.
  • the terminal device acquires the first downlink data channel scheduled by the first downlink control channel in the time slot.
  • the terminal device after acquiring the first downlink control channel and the first downlink data channel, the terminal device detects other channels or channels within the remaining symbols of the time slot. signal.
  • the other channels or signals include:
  • a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel and/or, a reference signal.
  • channel monitoring is performed according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot, and when the channel is detected to be idle, the first downlink data channel
  • the first downlink control channel and the first downlink data channel can avoid performing channel monitoring operations on all symbols in the time slot, and the position of the channel monitoring and the number of symbols occupied by the transmitted downlink data channel are Associated, it can avoid the need to prepare more copies of downlink data due to the uncertainty of the location where the channel listening is successful, and can avoid the uncertainty of the location occupied by the first downlink control channel, which requires the terminal device to respond to the
  • the first downlink control channel performs more times of blind detection, thereby reducing the processing burden of the network device and reducing the overhead of the blind detection of the terminal device.
  • the downlink data channel in the embodiment of the present application may be a downlink data channel based on the type B scheduling mode, and the transmission format of the type B PDSCH may not be modified.
  • performing channel detection or downlink control channel detection based on the number of symbols occupied by the downlink data channel can eliminate the need to configure the position of the terminal device for blind detection, which can save signaling overhead.
  • FIG. 6 is a schematic block diagram of a wireless communication method 300 for unlicensed spectrum according to an embodiment of the present application.
  • the method 300 includes at least part of the following content.
  • channel detection is sequentially performed until the channel is detected to be idle.
  • the candidate time domain position in the embodiment of the present application may be the starting position of the terminal device for blind detection of the downlink control channel, and each candidate time domain position corresponds to one symbol.
  • the candidate time-domain position in the embodiment of the present application may be referred to as the PDCCH blind detection start position.
  • the network device can configure the terminal device which symbols in the time slot are the symbols for blind detection of the downlink control channel, and the terminal device can perform blind detection on these positions in turn until the PDCCH is detected.
  • the network device may configure the at least one candidate time domain position through RRC signaling.
  • the potential starting position of the UE for blind PDCCH detection is configured by the gNB.
  • every two OSs can be used as a potential position for blind PDCCH detection.
  • the gNB configures 7 potential PDCCH blind detection start positions.
  • the network device in the case of detecting that the channel is idle based on the first candidate time domain position, the network device sends the first downlink control channel and the first downlink control channel schedule from the first candidate time domain position The first downlink data channel.
  • the gNB obtains the channel at any potential PDCCH blind detection start position, and transmits the PDSCH according to the pre-prepared data. For example, as shown in FIG. 8, the gNB preempts the channel at the 4th symbol, and then sends a PDSCH with a length of 7 symbols starting from the 4th symbol, which is a PDSCH prepared in advance.
  • the network device when the network device detects that the symbol of the channel idle is earlier than the first candidate time domain position, it starts from the symbol of the detected channel idle to the first candidate time domain. On the last symbol before the position, a placeholder signal or reference signal is sent.
  • the network device determines the type and number of channels or signals to be transmitted on the remaining symbols and/or the number of symbols occupied according to the number of remaining symbols in the time slot, wherein, the remaining symbols are the remaining symbols after transmitting the first downlink control channel and the first downlink data channel in the time slot; according to the determined type, number, and/or number of symbols occupied , For downlink transmission.
  • the channel or signal sent on the remaining symbols includes: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, reference signal.
  • the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
  • the second downlink data channel is the downlink data channel that occupies the largest number of symbols among the downlink data channels that can be sent among the remaining symbols.
  • a channel or signal to be sent on the remaining symbols is prepared.
  • the remaining number of symbols may not be able to transmit any length of PDSCH.
  • gNB transmits the longest PDSCH that can be supported on the remaining symbols. If there is remaining OS, then Transmit some reference signals, such as DM-RS or CSI-RS.
  • the gNB obtains the channel at the 4th symbol, and transmits a PDSCH with a length of 7 symbols, which is a pre-prepared PDSCH.
  • a PDSCH with a length of 2 symbols can be transmitted.
  • reference signals such as DMRS or CSI- RS.
  • At least one candidate time domain position configured by the network device in the time slot the detection of the first downlink control channel is sequentially performed until the first downlink control channel is detected.
  • the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot.
  • the terminal device after acquiring the first downlink control channel and the first downlink data channel, the terminal device detects other channels or channels within the remaining symbols of the time slot. signal.
  • the other channels or signals optionally include: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or a reference signal.
  • the network device performs channel detection in sequence based on at least one candidate time domain position configured to the terminal device in the time slot, until the channel is detected to be idle; when the channel is detected based on the first candidate time domain position
  • the first downlink control channel and the first downlink data channel scheduled by the first downlink control channel are sent, so that the network device can be configured for blind
  • the candidate time-domain position of the downlink control channel is detected, thereby making the blind detection of the downlink control channel more flexible. If more candidate time domain positions are needed, more candidate time domain positions can be configured, which enables the terminal device to blindly detect the downlink control channel at more candidate time domain positions, thereby increasing the probability of channel use.
  • FIG. 10 is a schematic block diagram of a network device 400 for unlicensed spectrum according to an embodiment of the present application.
  • the network device 400 includes a communication unit 410 and optionally a processing unit 420.
  • the communication unit 410 is configured to: perform channel monitoring according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot; when it is detected that the channel is idle, send the first downlink data channel scheduling A downlink control channel and the first downlink data channel.
  • the processing unit 420 is configured to: determine the symbol position for performing the channel monitoring in the time slot according to the number of symbols occupied by the first downlink data channel;
  • the communication unit 410 is further configured to perform the channel monitoring according to the determined symbol position.
  • the symbol for which the channel is detected to be idle is equal to the start symbol in the symbols for transmitting the first downlink control channel and the first downlink data channel; or, it is detected that the channel is idle.
  • the symbol of is earlier than the start symbol in the symbols of the first downlink control channel and the first downlink data channel.
  • the communication unit 410 is further configured to: On the last symbol before the start symbol, a placeholder signal and/or reference signal are sent.
  • the processing unit 420 is configured to: determine the type, number, and/or occupancy of channels or signals to be transmitted on the remaining symbols according to the number of remaining symbols in the time slot The remaining symbols are the remaining symbols after sending the first downlink control channel and the first downlink data channel in the time slot; the communication unit 410 is further configured to: determine according to The type, number, and/or number of symbols occupied are used for downlink transmission.
  • the channel or signal sent on the remaining symbols includes:
  • the second downlink control channel and the second downlink data channel scheduled by the second downlink control channel and/or, a reference signal; and/or, an occupant signal.
  • the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
  • the second downlink data channel is the downlink data channel that occupies the largest number of symbols among the downlink data channels that can be sent among the remaining symbols.
  • the processing unit 420 is configured to: prepare a channel to be sent on the remaining symbols during the process of sending the first downlink data channel and the first downlink control channel Or signal.
  • the network device 400 can implement the operations implemented by the network device in the foregoing method 200, and details are not repeated here for brevity.
  • the communication unit 410 is configured to: based on at least one candidate time domain position configured to the terminal device in the time slot, perform channel detection in sequence until the channel is detected to be idle; When the time domain position detects that the channel is idle, starting from the first candidate time domain position, the first downlink control channel and the first downlink data channel scheduled by the first downlink control channel are sent.
  • the communication unit 410 is further configured to: On the last symbol before the first candidate time domain position, a reference signal and/or a placeholder signal is sent.
  • the processing unit 420 is configured to: determine the type, number, and/or occupancy of channels or signals to be transmitted on the remaining symbols according to the number of remaining symbols in the time slot The remaining symbols are the remaining symbols after sending the first downlink control channel and the first downlink data channel in the time slot; the communication unit 410 is further configured to: determine according to The type, number, and/or number of symbols occupied are used for downlink transmission.
  • the channel or signal sent on the remaining symbols includes: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, reference Signal; and/or occupancy signal.
  • the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
  • the second downlink data channel is the downlink data channel that occupies the largest number of symbols among the downlink data channels that can be sent among the remaining symbols.
  • the processing unit 420 is configured to: prepare a channel to be sent on the remaining symbols during the process of sending the first downlink data channel and the first downlink control channel Or signal.
  • the network device 400 can implement the operations implemented by the network device in the foregoing method 300, and details are not repeated here for brevity.
  • FIG. 11 is a schematic block diagram of a terminal device 500 for unlicensed spectrum according to an embodiment of the present application.
  • the terminal device 500 includes a communication unit 510.
  • the communication unit 510 is configured to: detect the first downlink control channel in a time slot; wherein, the position of the first downlink control channel in the time slot is Determined according to the following: the number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot; when the first downlink control channel is detected, the In the time slot, the first downlink data channel scheduled by the first downlink control channel is acquired.
  • the communication unit 510 is further configured to: after acquiring the first downlink control channel and the first downlink data channel, set the remaining symbols in the time slot Inside, detect other channels or signals.
  • the other channels or signals include: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or a reference signal; and/ Or, placeholder signal.
  • the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
  • the second downlink data channel is: among the remaining symbols after the first downlink control channel and the first downlink data channel are sent, the downlink data channel that can be sent.
  • terminal device 500 can implement the corresponding operations implemented by the terminal device in the foregoing method 200, which is not repeated here for brevity.
  • the communication unit 510 is configured to: in the time slot at least one candidate time-domain position configured by the network device, perform the detection of the first downlink control channel in sequence until all the positions are detected.
  • the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot.
  • the communication unit 510 is further configured to:
  • the other channels or signals include: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or a reference signal; and/ Or, placeholder signal.
  • the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.
  • the second downlink data channel is: among the remaining symbols after the first downlink control channel and the first downlink data channel are sent, the downlink data channel that can be sent.
  • terminal device 500 can implement the corresponding operations implemented by the terminal device in the above method 300, and for the sake of brevity, details are not described here.
  • FIG. 12 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application.
  • the communication device 600 shown in FIG. 12 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 600 may further include a memory 620.
  • the processor 610 can call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.
  • the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
  • the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 600 may specifically be a network device in an embodiment of the present application, and the communication device 600 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here. .
  • the communication device 600 may specifically be a mobile terminal/terminal device of an embodiment of the present application, and the communication device 600 may implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For simplicity , I won’t repeat it here.
  • FIG. 13 is a schematic structural diagram of a chip of an embodiment of the present application.
  • the chip 700 shown in FIG. 13 includes a processor 710, and the processor 710 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the chip 700 may further include a memory 720.
  • the processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiment of the present application.
  • the memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.
  • the chip 700 may further include an input interface 730.
  • the processor 710 can control the input interface 730 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the chip 700 may further include an output interface 740.
  • the processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • chips mentioned in the embodiments of the present application may also be referred to as system-level chips, system-on-chips, system-on-chips, or system-on-chips.
  • FIG. 14 is a schematic block diagram of a communication system 14 provided by an embodiment of the present application.
  • the communication system 800 includes a terminal device 810 and a network device 820.
  • the terminal device 810 can be used to implement the corresponding function implemented by the terminal device in the above method
  • the network device 820 can be used to implement the corresponding function implemented by the network device in the above method. For brevity, it will not be repeated here. .
  • the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA ready-made programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be Read-Only Memory (ROM), Programmable Read-Only Memory (Programmable ROM, PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), and Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM, ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.
  • the embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application For the sake of brevity, I won’t repeat it here.
  • the embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • it is not here. Repeat it again.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, For the sake of brevity, I will not repeat them here.
  • the embodiment of the application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program is run on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiments of the present application.
  • the computer program runs on the computer, the computer can execute each method in the embodiments of the present application. For the sake of brevity, the corresponding process will not be repeated here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Abstract

Les modes de réalisation de la présente invention concernent un procédé de communication sans fil pour un spectre sans licence, un dispositif réseau et un dispositif terminal, qui peut réaliser la transmission d'un canal de liaison descendante sur le spectre sans licence et peut réduire la charge de traitement du dispositif réseau, réduisant ainsi le surdébit de détection aveugle du dispositif terminal. Le procédé consiste à : exécuter une surveillance de canal en fonction du nombre de symboles occupés par un premier canal de données de liaison descendante à transmettre dans un créneau temporel ; et lorsqu'il est détecté qu'un canal est inactif, envoyer un premier canal de commande de liaison descendante qui planifie le premier canal de données de liaison descendante et le premier canal de données de liaison descendante.
PCT/CN2019/074662 2019-02-02 2019-02-02 Procédé de communication sans fil pour spectre sans licence, dispositif réseau et dispositif terminal WO2020155168A1 (fr)

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CN201980074072.1A CN113170324B (zh) 2019-02-02 2019-02-02 用于非授权频谱的无线通信方法、网络设备和终端设备

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CN108282875A (zh) * 2017-01-06 2018-07-13 华为技术有限公司 一种数据收发方法及设备
CN109121198A (zh) * 2017-06-23 2019-01-01 维沃移动通信有限公司 一种非授权频段下的信息传输方法及网络设备

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CN114025378A (zh) * 2021-10-13 2022-02-08 北京邮电大学 一种基于跨信道扫描的LoRa信道占用检测方法及系统
CN114025378B (zh) * 2021-10-13 2023-08-25 北京邮电大学 一种基于跨信道扫描的LoRa信道占用检测方法及系统

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