WO2021175067A1 - 信关站切换方法及装置 - Google Patents

信关站切换方法及装置 Download PDF

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Publication number
WO2021175067A1
WO2021175067A1 PCT/CN2021/074849 CN2021074849W WO2021175067A1 WO 2021175067 A1 WO2021175067 A1 WO 2021175067A1 CN 2021074849 W CN2021074849 W CN 2021074849W WO 2021175067 A1 WO2021175067 A1 WO 2021175067A1
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WIPO (PCT)
Prior art keywords
channel quality
gateway station
satellite
terminal device
quality
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Application number
PCT/CN2021/074849
Other languages
English (en)
French (fr)
Inventor
王晓鲁
罗禾佳
汪宇
陈莹
施学良
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21765235.3A priority Critical patent/EP4102886A4/en
Publication of WO2021175067A1 publication Critical patent/WO2021175067A1/zh
Priority to US17/898,952 priority patent/US20220417817A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0058Transmission of hand-off measurement information, e.g. measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/06Airborne or Satellite Networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/12Reselecting a serving backbone network switching or routing node
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/16Performing reselection for specific purposes
    • H04W36/18Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection

Definitions

  • the embodiments of the present application relate to the technical field of satellite communication, and in particular, to a method and device for handover of a gateway station.
  • the 5th generation mobile communication (5G) technology introduces non-terrestrial network (NTN), which is a user equipment (user equipment, UE) provides coverage, with features such as large coverage and flexible networking.
  • NTN non-terrestrial network
  • UE user equipment
  • the link between the terminal equipment and the gateway includes two parts: the service link between the terminal equipment and the satellite, and the feeder link between the satellite and the gateway.
  • the main functions of the satellite include transparent transmission, etc. . Therefore, if the overall link between the terminal equipment and the customs station has quality problems, it may be that the service link is of poor quality, the feeder link is of poor quality, and both the service link and the feeder link are of poor quality. When there is a problem with the feeder link, the common solution is to switch the gateway.
  • the terminal device sends an uplink reference signal to the base station, and the base station judges the quality of the link between the terminal device and the base station based on the quality of the uplink reference signal.
  • the gateway station determines that the quality of the link between the terminal device via satellite and the gateway station is poor, it cannot be further determined: Whether the quality of the electrical link is poor or the quality of the service link is poor, and then it is impossible to determine whether the gateway should be switched, resulting in poor communication quality.
  • the embodiment of the application provides a gateway switching method and device. By comparing the quality of the link from the source gateway to the terminal device via the satellite and the quality of the link from the target gateway to the terminal device via the satellite, it is determined whether the switching signal is required. Close stations and improve communication quality.
  • the embodiments of the present application provide a gateway switching method, which can be applied to terminal equipment, and can also be applied to the chip in the terminal equipment.
  • the method is described below by taking the application to the terminal equipment as an example.
  • the method includes: the terminal device detects that the quality of the downlink signal from the source gateway station and forwarded via the satellite is lower than a first threshold, and sends first indication information to the source gateway station, the first indication information is used to indicate that the first channel quality is low At the first threshold, the first channel quality is used to characterize the quality of the link between the terminal device and the source gateway via the satellite. This kind of scheme is adopted to realize the purpose of triggering the switch of the gateway station by the terminal equipment.
  • the terminal device after sending the first indication information to the source gateway, the terminal device also sends an uplink reference signal to the satellite.
  • the uplink reference signal is used for the source gateway to detect the first channel quality and the target
  • the gateway station detects the second channel quality, and the second channel quality is used to characterize the quality of the link between the terminal device and the target gateway station via the satellite.
  • the above-mentioned first indication information is an uplink reference signal
  • the uplink reference signal is used for the source gateway station to detect the first channel quality
  • the target gateway station to detect the second channel quality
  • the second channel quality It is used to characterize the quality of the link between the terminal device and the target gateway via the satellite.
  • the terminal device before the terminal device detects that the quality of the downlink signal from the source gateway station and forwarded by the satellite is lower than the first threshold, it also receives the first threshold, activation instruction, and target from the source gateway station and forwarded by the satellite. At least one of the number of times N and the interval duration T, where the activation instruction is used to instruct the terminal device to send the uplink reference signal when the quality of the downlink signal is lower than the first threshold, and the target number of times N is used to indicate the number of times the terminal device sends the uplink reference signal ,
  • the interval duration T is used to indicate the duration between when the terminal device transmits the uplink reference signal N times and then detects the quality of the downlink signal again, and N ⁇ 1 and is an integer. This kind of scheme is adopted to realize the purpose of the source customs station to control whether the terminal equipment opens the customs station function.
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval time T is carried in the broadcast information; or, the first threshold, the activation instruction, the target number of times N, and the interval time T are included in the broadcast information.
  • At least one is carried in the connected state information, the connected state information includes at least one of RRC information, downlink control information DCI, group DCI, medium access control MAC element, and timing advance command TAC; or, the first threshold, activation instruction, At least one of the target number of times N and the interval duration T is sent through the physical downlink shared data channel.
  • the above method further includes: receiving the second indication information sent by the source gateway via the satellite by the terminal device, and the second indication information is used to indicate the transmission resource of the uplink reference signal.
  • the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword or different transmission resources; or, the transmission resources in the same beam coverage area or cell
  • the transmission resources of different terminal devices are transmission resources with the same time-frequency domain resources and different codewords.
  • the embodiments of the present application provide a gateway switching method.
  • the method can be applied to the source gateway station or the chip in the source gateway station.
  • the method is applied to the source gateway station as an example.
  • the method includes: when the quality of the link between the terminal device and the source gateway via satellite is poor, the source gateway sends the third instruction information to the target gateway, so that the target gateway sends the second information to the source gateway.
  • Channel quality that is, the quality of the link from the terminal device to the target gateway via the satellite.
  • the source gateway station determines whether to switch the terminal device to the target gateway station by using the second channel quality and the first channel quality used to characterize the link quality between the terminal device and the source gateway station via the satellite.
  • the source gateway station determines whether it is time to switch the gateway station by comparing the quality of the link from the source gateway station to the terminal device via the satellite and the link from the target gateway station to the terminal device via the satellite to determine whether the gateway station should be switched to improve communication quality.
  • the source gateway station before the source gateway station sends the third indication information to the target gateway station, it also determines that the quality of the first channel is lower than the first threshold. By adopting this scheme, the source gateway station actively triggers the purpose of gateway switchover.
  • the source gateway station before the source gateway station sends the third instruction information to the target gateway station, it also receives the first instruction information from the terminal device and forwarded via the satellite, and the first instruction information is used to instruct the terminal device to pass through the satellite.
  • the channel quality of the link to the source gateway is lower than the first threshold. This kind of scheme is adopted to realize the purpose of the terminal equipment actively triggering the switch of the gateway station.
  • the uplink reference signal is also used for the source gateway station to detect the first channel quality, and the target gateway station to detect the second channel quality .
  • the terminal device does not need to send the first indication information before sending the uplink reference signal, which reduces the number of times the terminal device sends signals.
  • the source gateway station before the source gateway station receives the first indication information from the terminal device and forwarded via the satellite, it also sends at least one of the first threshold, the activation instruction, the number of targets N, and the interval time T to the terminal device through the satellite.
  • the activation instruction is used to instruct the terminal device to send the uplink reference signal when the quality of the downlink signal is lower than the first threshold
  • the target number of times N is used to indicate the number of times the terminal device sends the uplink reference signal
  • the interval duration T is used to instruct the terminal device to send The length of time between N times of uplink reference signal and detection of downlink signal quality again, N ⁇ 1 and an integer. This kind of scheme is adopted to realize the purpose of the source customs station to control whether the terminal equipment opens the customs station function.
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval time T is carried in the broadcast information; or, the first threshold, the activation instruction, the target number of times N, and the interval time T are included in the broadcast information.
  • At least one is carried in the connected state information, the connected state information includes at least one of RRC information, downlink control information DCI, group DCI, medium access control MAC element, and timing advance command TAC; or, the first threshold, activation instruction, At least one of the target number of times N and the interval duration T is sent through the physical downlink shared data channel.
  • the source gateway station uses the second channel quality and the first channel quality to determine whether to switch the terminal equipment to the target gateway station: when the first channel quality is less than the second threshold and the second channel When the quality is greater than or equal to the second threshold, the source gateway station switches the terminal equipment from the source gateway to the target gateway; or, when the first channel quality is less than the second threshold and the second channel quality is greater than or equal to the second threshold , The source gateway station switches each terminal device in the target area from the source gateway station to the target gateway station.
  • the target area is the cell or beam coverage area where the terminal device is located.
  • the cell includes at least one beam coverage area, and the cell is included in the satellite coverage. Within range. Adopt this kind of scheme, realize the goal of the customs station handover of terminal equipment level, cell level or beam coverage area level.
  • the above method further includes: when the quality of the first channel is less than the second threshold and the quality of the second channel is less than the second threshold, the source gateway station performs satellite handover to the terminal device; or, when the first channel When the quality is less than the second threshold and the second channel quality is less than the second threshold, the source gateway station performs satellite handover for each terminal device in the target area.
  • the target area is the cell or beam coverage area where the terminal device is located, and the cell contains at least one beam Coverage area, the cell is included in the coverage area of the satellite. Adopt this kind of scheme, realize the goal of the satellite handover of terminal equipment level, cell level or beam coverage area level.
  • the source gateway station before the source gateway station receives the second channel quality from the target gateway station, it also sends second indication information to the terminal device via the satellite.
  • the second indication information is used to indicate the transmission resource for transmitting the uplink reference signal.
  • the uplink reference signal is used to detect the quality of the first channel.
  • the above-mentioned third indication information is also used to indicate the transmission resource where the uplink reference signal is located, and the uplink reference signal is used to detect the first channel quality.
  • the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword or different transmission resources; or, the transmission resources in the same beam coverage area or cell
  • the transmission resources of different terminal devices are transmission resources with the same time-frequency domain resources and different codewords.
  • the above method further includes: the source gateway station sends fourth indication information to the satellite, and the fourth indication information is used to instruct the satellite to send the uplink reference signal to the source gateway station and the target gateway station.
  • the source gateway station triggers the satellite to forward the signal from the terminal equipment to multiple gateway stations.
  • the embodiments of the present application provide a gateway switching method.
  • the method can be applied to the target gateway station or the chip in the target gateway station.
  • the following uses the target gateway station as an example.
  • the method is described.
  • the method includes: the target gateway station receives third indication information sent by the source gateway station, the third indication information is used to instruct the target gateway station to feed back the second channel quality to the source gateway station, the second channel Quality is used to characterize the quality of the link from the terminal device to the target gateway via the satellite.
  • the target gateway station determines the second channel quality, and sends the second channel quality to the source gateway station.
  • the target gateway station determines the second channel quality: the target gateway station receives an uplink reference signal from a terminal device and forwarded via a satellite, and determines the second channel quality according to the uplink reference signal.
  • the above-mentioned third indication information is also used to indicate the transmission resource where the uplink reference signal is located, and the uplink reference signal is used to detect the first channel quality.
  • the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword or different transmission resources; or, the transmission resources in the same beam coverage area or cell
  • the transmission resources of different terminal devices are transmission resources with the same time-frequency domain resources and different codewords.
  • an embodiment of the present application provides a communication device, including:
  • a processing unit for detecting that the quality of the downlink signal from the source gateway and forwarded via the satellite is lower than the first threshold
  • a transceiver unit configured to send first indication information to the source gateway, where the first indication information is used to indicate that the first channel quality is lower than the first threshold, and the first channel quality is used to characterize the terminal The quality of the link between the device via the satellite and the source gateway.
  • the transceiver unit after sending the first indication information to the source gateway, is also used to send an uplink reference signal to the satellite, and the uplink reference signal is used for the source gateway.
  • the station detects the first channel quality
  • the target gateway station detects the second channel quality
  • the second channel quality is used to characterize the quality of the link from the terminal device to the target gateway station via satellite.
  • the first indication information is an uplink reference signal
  • the uplink reference signal is used for the source gateway station to detect the first channel quality
  • the target gateway station to detect the second channel quality
  • the second channel quality is used to characterize the quality of the link between the terminal device and the target gateway via the satellite.
  • the transceiving unit is further configured to receive the signal from the source gateway station before the processing unit detects that the quality of the downlink signal forwarded by the satellite from the source gateway station is lower than the first threshold. At least one of the first threshold, the activation instruction, the target number of times N, and the interval time T forwarded via the satellite, wherein the activation instruction is used to instruct the terminal device to have a downlink signal quality lower than the first
  • the uplink reference signal is sent at a threshold
  • the target number of times N is used to indicate the number of times the terminal device sends the uplink reference signal
  • the interval duration T is used to instruct the terminal device to send the uplink reference signal N times
  • the length of time between detecting the quality of the downlink signal again where N ⁇ 1 and is an integer.
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval time T is carried in broadcast information; or,
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval duration T is carried in connected state information, and the connected state information includes RRC information, downlink control information DCI, and group DCI , At least one of the medium access control MAC element and the timing advance command TAC; or, at least one of the first threshold, the activation instruction, the target number of times N, and the interval duration T share data through physical downlink Channel transmission.
  • the transceiver unit is further configured to receive second indication information sent by the source gateway via the satellite, and the second indication information is used to indicate the transmission resource of the uplink reference signal.
  • the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword or different transmission resources; or, the transmission resources in the same beam coverage area or cell
  • the transmission resources of different terminal devices are transmission resources with the same time-frequency domain resources and different codewords.
  • an embodiment of the present application provides a communication device, including:
  • the sending unit is configured to send third indication information to the target gateway station, where the third indication information is used to instruct the target gateway station to feed back the second channel quality to the source gateway station, and the second channel quality is used for To characterize the quality of the link from the terminal device to the target gateway via satellite;
  • a receiving unit configured to receive the second channel quality from the target gateway station
  • the processing unit is configured to use the second channel quality and the first channel quality to determine whether to switch the terminal device to the target gateway, and the first channel quality is used to characterize that the terminal device is connected to the terminal via satellite. The quality of the link between the source gateways.
  • the processing unit is further configured to determine that the quality of the first channel is lower than a first threshold before the sending unit sends the third indication information to the target gateway station.
  • the receiving unit is further configured to receive the first instruction information from the terminal device and forwarded via the satellite before the sending unit sends the third instruction information to the target gateway station,
  • the first indication information is used to indicate that the channel quality of the link from the terminal device to the source gateway via the satellite is lower than a first threshold.
  • the uplink reference signal is also used for the source gateway station to detect the first channel quality and the target signal The gateway station detects the quality of the second channel.
  • the sending unit before the receiving unit receives the first instruction information from the terminal device and forwarded via the satellite, the sending unit is further configured to send the terminal device to the terminal device through the satellite.
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval duration T where the activation instruction is used to instruct the terminal device to send the uplink signal when the quality of the downlink signal is lower than the first threshold.
  • the target number of times N is used to indicate the number of times that the terminal device sends the uplink reference signal
  • the interval duration T is used to instruct the terminal device to send the uplink reference signal N times until the downlink signal quality is detected again.
  • the duration of the interval said N ⁇ 1 and is an integer.
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval time T is carried in broadcast information; or,
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval duration T is carried in connected state information, and the connected state information includes RRC information, downlink control information DCI, and group DCI , At least one of the medium access control MAC element and the timing advance command TAC; or, at least one of the first threshold, the activation instruction, the target number of times N, and the interval duration T share data through physical downlink Channel transmission.
  • the processing unit when the first channel quality is less than a second threshold and the second channel quality is greater than or equal to the second threshold, the processing unit is configured to remove the terminal device from the The source gateway is switched to the target gateway; or, when the first channel quality is less than a second threshold and the second channel quality is greater than or equal to the second threshold, the processing unit uses To switch each terminal device in a target area from the source gateway to the target gateway, the target area is the cell or beam coverage area where the terminal device is located, and the cell includes at least one beam coverage area , The cell is included in the coverage area of the satellite.
  • the processing unit when the first channel quality is less than a second threshold and the second channel quality is less than the second threshold, the processing unit is configured to perform satellite handover on the terminal device; Or, when the first channel quality is less than the second threshold and the second channel quality is less than the second threshold, the processing unit is configured to perform satellite handover for each terminal device in the target area, and
  • the target area is a cell or beam coverage area where the terminal device is located, the cell includes at least one beam coverage area, and the cell is included in the coverage area of the satellite.
  • the sending unit is further configured to send a second instruction to the terminal device via the satellite before the receiving unit receives the second channel quality from the target gateway station Information, the second indication information is used to indicate a transmission resource for transmitting an uplink reference signal, and the uplink reference signal is used to detect the first channel quality.
  • the third indication information is also used to indicate a transmission resource where an uplink reference signal is located, and the uplink reference signal is used to detect the first channel quality.
  • the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword or different transmission resources; or, the transmission resources in the same beam coverage area or cell
  • the transmission resources of different terminal devices are transmission resources with the same time-frequency domain resources and different codewords.
  • the sending unit is further configured to send fourth indication information to the satellite, where the fourth indication information is used to instruct the satellite to send the uplink reference signal to the source gateway Station and the target gateway station.
  • an embodiment of the present application provides a communication device, including:
  • the receiving unit is configured to receive third indication information sent by the source gateway station, where the third indication information is used to instruct the target gateway station to feed back the second channel quality to the source gateway station, and the second channel quality is used for To characterize the quality of the link from the terminal device to the target gateway via satellite;
  • a processing unit configured to determine the second channel quality
  • the sending unit is used to send the second channel quality to the source gateway station.
  • the receiving unit is further configured to receive an uplink reference signal from the terminal device and forwarded via the satellite;
  • the processing unit is configured to determine the second channel quality according to the uplink reference signal.
  • the third indication information is also used to indicate a transmission resource where an uplink reference signal is located, and the uplink reference signal is used to detect the first channel quality.
  • the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword or different transmission resources; or, the transmission resources in the same beam coverage area or cell
  • the transmission resources of different terminal devices are transmission resources with the same time-frequency domain resources and different codewords.
  • an embodiment of the present application provides a communication device, including a processor, a memory, and a computer program stored on the memory and capable of running on the processor.
  • the communication device realizes The method in the above first aspect or various possible implementations of the first aspect.
  • an embodiment of the present application provides a communication device, including a processor, a memory, and a computer program stored on the memory and capable of running on the processor.
  • the communication device realizes The method in the above second aspect or various possible implementations of the second aspect.
  • an embodiment of the present application provides a communication device, including a processor, a memory, and a computer program stored on the memory and capable of running on the processor.
  • the communication device realizes The method in the above third aspect or various possible implementation manners of the third aspect.
  • an embodiment of the present application provides a communication device, including: a logic circuit and an input interface, wherein the input interface is used to obtain the data to be processed, and the logic circuit is used to execute the data to be processed as in the first
  • the method according to any one of the aspects obtains the processed data.
  • the communication device further includes: an output interface for outputting the processed data.
  • an embodiment of the present application provides a communication device, including: a logic circuit and an input interface, wherein the input interface is used to obtain data to be processed, and the logic circuit is used to execute the data to be processed as described in the first
  • the method described in any one of the two aspects obtains processed data.
  • the communication device further includes: an output interface for outputting the processed data.
  • an embodiment of the present application provides a communication device, including: a logic circuit and an input interface, wherein the input interface is used to obtain data to be processed, and the logic circuit is used to execute the data to be processed as described in the first
  • the method described in any one of the three aspects obtains the processed data.
  • the communication device further includes: an output interface for outputting the processed data.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium is used to store a program, and when the program is executed by a processor, it is used to execute any of the items described in the first aspect Methods.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium is used to store a program, and when the program is executed by a processor, it is used to execute any of the items described in the second aspect.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium is used to store a program, and when the program is executed by a processor, the Methods.
  • embodiments of the present application provide a computer program product, which when the computer program product runs on a communication device, causes the communication device to execute the method described in any one of the first aspect.
  • an embodiment of the present application provides a computer program product, which when the computer program product runs on a communication device, causes the communication device to execute the method described in any one of the second aspect.
  • embodiments of the present application provide a computer program product, which when the computer program product runs on a communication device, causes the communication device to execute the method described in any one of the third aspect.
  • the source gateway when the quality of the link between the terminal device and the source gateway via satellite is poor, the source gateway sends the third instruction information to the target gateway, so that the target gateway sends
  • the source gateway station feeds back the second channel quality, that is, the quality of the link from the terminal device to the target gateway station via the satellite.
  • the source gateway station determines whether to switch the terminal device to the target gateway station by using the second channel quality and the first channel quality used to characterize the link quality between the terminal device and the source gateway station via the satellite. In this process, the source gateway station determines whether to switch the gateway station by comparing the quality of the link from the source gateway station to the terminal device via the satellite and the target gateway station to the terminal device via the satellite to determine whether the gateway station should be switched to improve communication quality.
  • Figure 1A is a schematic diagram of poor quality of the feeder link
  • Figure 1B is a schematic diagram of poor service link quality
  • Figure 1C is a schematic diagram of poor quality of the service link and the feeder link
  • FIG. 2 is a schematic diagram of a network architecture to which the gateway switching method provided by an embodiment of the present application is applicable;
  • Fig. 3 is a flowchart of a gateway switching method provided by an embodiment of the present application.
  • FIG. 4 is a flowchart of another gateway switching method provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 6 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • the first type periodically sending uplink reference signals.
  • the network device configures the terminal device with resources for periodically sending the uplink reference signal, and the terminal device periodically sends the uplink reference signal.
  • the second type semi-static transmission of the uplink reference signal.
  • the network device configures a semi-static resource for the terminal device. After receiving the resource, the terminal device does not immediately send the uplink reference signal, but waits for the activation instruction sent by the network device to send the uplink reference periodically. Signal.
  • the third type sending uplink reference signals non-periodically.
  • the network device configures a non-periodic resource for the terminal device, and the terminal device sends the uplink reference signal on the aperiodic resource only after receiving the instruction sent by the network device.
  • NTN communications include satellite communications and high-altitude platform communications. Because this type of network equipment is at an altitude of several hundred kilometers to tens of thousands of kilometers from the ground, NTN has the characteristics of large coverage and flexible networking. NTN is developing towards the goal of T-bit magnitude.
  • the gateway station uses the uplink reference signal from the terminal equipment and transmitted via satellite to detect the link quality.
  • the gateway station determines that the link quality is poor, it cannot It is further judged whether the feeder link or the service link has severe propagation loss. For example, refer to Figures 1A-1C.
  • Figure 1A is a schematic diagram of the poor quality of the feeder link. Please refer to Figure 1A, the terminal equipment is located in a certain beam coverage area of the satellite. A service link is established between the terminal equipment and the satellite, and a feeder link is established between the satellite and the gateway. The feeder link is affected by the weather. low quality.
  • Figure 1B is a schematic diagram of poor service link quality. Please refer to Figure 1B, the terminal equipment is located in a certain beam coverage area of the satellite, the service link is established between the terminal equipment and the satellite, and the feeder link is established between the satellite and the gateway. The quality of the service link is affected by the weather. Difference.
  • Figure 1C is a schematic diagram of poor quality of the service link and the feeder link.
  • the terminal equipment is located in a certain beam coverage area of the satellite.
  • the terminal equipment and the satellite establish a service link
  • the satellite and the customs station establish a feeder link.
  • the service link is affected by the weather.
  • the quality of the feeder links is poor.
  • the service link and feeder link will be affected by weather, etc.
  • the working mode of the satellite is transparent forwarding (transparent), and the terminal equipment passes the downlink reference from the gateway and forwarded via the satellite.
  • the detected channel quality includes the feeder link and the service link channel quality, and it is impossible to separate the two channel qualities.
  • the channel quality detected by the gateway station through the uplink reference signal also includes the channel quality of the feeder link and the service link, and the gateway station cannot separate the channel quality of the two parts.
  • the terminal device uses the above-mentioned first or second method to transmit the uplink reference signal, the power of the terminal device will be wasted; if the terminal device uses the above-mentioned third method to transmit the uplink reference signal, that is, the terminal device irregularly transmits the uplink reference signal.
  • the uplink reference signal is sent multiple times, the aperiodic sending of the uplink reference signal will cause greater signaling interaction, which affects the efficiency of uplink and downlink data transmission.
  • the embodiments of the present application provide a gateway switching method and communication device. By comparing the quality of the link from the source gateway to the terminal device via the satellite and the link from the target gateway to the terminal device via the satellite, it is determined Tell whether the gateway should be switched to improve communication quality.
  • the gateway switching method provided by the embodiments of this application mainly involves three executive bodies of the source gateway, the target gateway, and the terminal device, and can be applied to the NTN communication system, which is based on the 4th generation (4G) Cellular systems related to mobile communication systems (for example, long term evolution (LTE), advanced long term evolution (LTE-A)), and 3rd generation partnership project (3GPP) related cells System, the 5th generation (5G) mobile communication system, and the subsequent evolution of the communication system are established.
  • 4G 4th generation
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • 3GPP 3rd generation partnership project
  • 5G 5th generation
  • 5G can also be called new radio (NR).
  • the gateway station may also be referred to as a gateway station, gateway, etc., which can be set separately from network equipment, such as gNB in 5G and eNB in LTE, or integrated with gNB, eNB, etc.
  • the gateway station including the source gateway station and the target gateway station, is a gateway station that integrates network equipment functions.
  • the source gateway refers to the gateway that currently provides communication services for the terminal equipment in the beam coverage area of the satellite
  • the target gateway is the gateway that provides services for the terminal equipment after the gateway is switched, that is, the target gateway
  • a customs station is a customs station that has the ability to provide communication services to terminal equipment, but has not yet provided services to terminal equipment.
  • the source gateway station and the target gateway station are set separately from the network equipment, in this embodiment of the application, the source gateway station sends the first channel quality and the target gateway station sends the second channel quality to the network equipment. , It is up to the network equipment to decide whether to implement the gateway switch.
  • the satellite is a satellite working in a transparent forwarding mode, which can determine to send an uplink reference signal from a terminal device to one or more gateway stations according to the control of an earth station (not shown in the figure).
  • the satellite can also be pre-configured to forward uplink reference signals from terminal equipment to multiple gateways, or the source gateway can trigger the satellite to forward uplink reference signals from terminal equipment to multiple gateways.
  • the application examples are not limited.
  • the gateway station can have the function of an earth station, that is, the earth station and the gateway station can be combined into one. At this time, the gateway station has both the function of wireless communication management and the function of controlling satellites.
  • Terminal equipment includes, but is not limited to, connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and/or another data Connection/network; and/or via wireless interfaces, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters; and/ Or another terminal device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • 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".
  • Examples of the terminal equipment include, but are not limited to, satellite phones 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, and the Internet /Intranet access, Web browser, memo pad, calendar, and/or PDA with Global Positioning System (GPS) receiver; and conventional laptop and/or palm-type receiver or including radio phone transceiver Other electronic devices. It can refer to an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device.
  • PCS Personal Communications System
  • It can also 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), and a wireless communication function.
  • Fig. 2 is a schematic diagram of a network architecture to which the gateway switching method provided in an embodiment of the present application is applicable.
  • the network architecture includes: terminal equipment, satellite 1, satellite 2, source gateway, target gateway, and core network.
  • a service link is established between the terminal equipment and the satellite 1, and a feeder link is established between the satellite 1 and the source gateway.
  • the beam coverage area of the satellite includes beam coverage area 1 to beam coverage area 4 and other beam coverage areas (not shown in the figure). (Shown), the source gateway station provides communication services for the beam coverage area 1 where the terminal device is located.
  • the source gateway station can also provide communication services for the terminal devices in the beam coverage area 2 to the beam coverage area 4, and the target gateway station is A backup gateway, which can establish a feeder link with satellite 1, and if it performs gateway switching for terminal equipment, it will provide communication services for the terminal equipment.
  • the distance between satellite 2 and satellite 1 is relatively long. If satellite switching is performed for terminal equipment, satellite 2 can provide services for the terminal equipment.
  • Each ellipse in the figure represents a beam coverage area. Service links and feeder circuits will suffer severe degradation of channel quality due to weather, obstruction, etc.
  • Fig. 2 there is at least one target gateway station. If no special instructions are given below, the following target gateway station is any one of the two target gateway stations in Fig. 2.
  • the first channel quality the quality of the link from the terminal device to the source gateway via satellite 1;
  • the second channel quality the quality of the link from the terminal equipment to the target gateway via satellite 1;
  • First indication information indication information sent by the terminal device to the source gateway through the satellite 1 and used to indicate that the quality of the first channel is lower than the first threshold;
  • the second indication information the indication information that the source gateway sends to the terminal device via the satellite and is used to indicate the transmission resource of the uplink reference signal;
  • Third indication information indication information sent by the source gateway station to the target gateway station and used to instruct the target gateway station to feed back the quality of the second channel to the source gateway station;
  • Fourth instruction information instruction information sent by the source gateway station to satellite 1 for instructing satellite 1 to send uplink reference signals to multiple gateway stations.
  • the fourth instruction information may also be sent by the source gateway station to the earth station, so that The earth station triggers satellite 1 to send uplink reference signals to multiple gateways.
  • the fourth indication information may not be required.
  • the earth station triggers satellite 1 to send uplink reference signals to multiple gateway stations from 3 to 6 pm; at the same time, the source gateway station also operates according to weather conditions. Interact with the target gateway from 3 to 6 in the afternoon.
  • energy saving and interference are not considered, it can also be that the satellite always forwards the signals it receives from the terminal equipment to multiple gateways.
  • FIG. 3 is a flowchart of a gateway switching method provided by an embodiment of the present application.
  • This embodiment provides a detailed description of the embodiment of the present application from the perspective of switching between the source gateway station and the target gateway station. illustrate.
  • This embodiment includes:
  • the source gateway station sends third instruction information to the target gateway station.
  • the target gateway station receives third indication information from the source gateway station, and the third indication information is used to instruct the target gateway station to feed back the second channel quality to the source gateway station, and the second channel quality It is used to characterize the quality of the link from the terminal device to the target gateway via the satellite.
  • the third instruction information is sent to the target gateway station.
  • the third indication information may be carried in measurement and report (measurement and report) signaling and sent to the target gateway station.
  • the source gateway station finds the uplink signal from the terminal equipment and transmitted via satellite, such as the quality of the uplink reference signal or the uplink data signal is lower than the first threshold, then the terminal equipment is considered to be transmitted via the satellite. 1
  • the link quality to the source gateway is poor, and the first channel quality is obtained, and the first channel quality is used to characterize the quality of the link between the terminal device and the source gateway via the satellite.
  • the source gateway station actively sends the third instruction information to the target gateway station. This scheme is adopted to realize the purpose of the source gateway station actively triggering the gateway station handover.
  • the quality of the uplink reference signal or the uplink data signal is equal to the first threshold, it can be considered that the link quality between the terminal device and the source gateway via the satellite 1 is poor. That is to say, when the value is exactly equal to the threshold value, it can be combined into a situation that is less than the threshold value, or into a situation that is greater than the threshold value, and even specifically designed for the situation that is equal to the threshold value.
  • This application does not limit it.
  • the situations involving thresholds in the embodiments are also similar, and will not be repeated here.
  • the terminal device when the terminal device detects that the quality of the downlink signal from the source gateway station and transmitted via the satellite is lower than the first threshold, it sends the first indication information to the source gateway station via the satellite, thereby triggering the source gateway station to send to the target gateway station The third instruction information.
  • the first indication information is used to indicate to the source gateway station that the quality of the first channel is lower than the first threshold.
  • the first indication information may explicitly indicate to the source gateway station that the first channel quality is lower than the first threshold, for example, 0 indicates that the first channel quality is lower than the first threshold, and 1 indicates that the first channel quality is higher than or equal to the first threshold.
  • the first indication information can also implicitly indicate to the source gateway station that the quality of the first channel is lower than the first threshold, for example, pre-appoint a special structure of the uplink reference signal, if the source gateway station receives the terminal equipment sent via satellite For an uplink reference signal with a special structure, it is considered that the quality of the first channel is lower than the first threshold.
  • This kind of scheme is adopted to realize the purpose of the terminal equipment actively triggering the switch of the gateway station.
  • the third indication information may also indicate to the target gateway station the transmission resource carrying the uplink reference signal, the scrambling code used when the terminal device sends the uplink reference signal, the modulation and coding scheme (modulation and coding scheme, MCS), The round-trip delay of the feeder link between the source gateway station and the satellite, or the round-trip delay difference between the source gateway station and the target gateway station and the satellite.
  • MCS modulation and coding scheme
  • the target gateway station sends the second channel quality to the source gateway station.
  • the source gateway station receives the second channel quality from the target gateway station.
  • the source gateway station uses the second channel quality and the first channel quality to determine whether to switch the terminal device to the target gateway station.
  • the first channel quality is used to characterize the quality of the link between the terminal device and the source gateway via a satellite.
  • the first channel quality may be that the source gateway station uses the downlink signal by itself.
  • the first channel quality may be obtained by the source gateway station serving the terminal device by using the uplink signal forwarded by the terminal device via satellite, or it may be obtained by the terminal device using the source gateway station and transmitted via satellite.
  • the downlink signal is obtained and notified to the source gateway station through the first indication information; or, after the source gateway station receives the first indication information from the terminal equipment and forwarded via the satellite, it then forwards the uplink reference signal to the terminal equipment via the satellite Measured.
  • the first channel quality includes the quality of the service link from the terminal equipment to the satellite 1 and the quality of the feeder link from the satellite 1 to the source gateway.
  • the second channel quality includes the quality of the service link from the terminal equipment to the satellite 1 and the quality of the feeder link from the satellite 1 to the target gateway.
  • the reason for the difference between the quality of the first channel and the quality of the second channel is that the feeder links are different.
  • the quality of the second channel is greater than the quality of the first channel, it is because the quality of the feeder link between satellite 1 and the target gateway is better than the quality of the feeder link between satellite 1 and the source gateway. . At this time, switching the gateway can improve the quality of the feeder link.
  • the source gateway when the quality of the link between the terminal device and the source gateway via satellite is poor, the source gateway sends the third instruction information to the target gateway, so that the target gateway sends
  • the source gateway station feeds back the second channel quality, that is, the quality of the link from the terminal device to the target gateway station via the satellite.
  • the source gateway station determines whether to switch the terminal device to the target gateway station by using the second channel quality and the first channel quality used to characterize the link quality between the terminal device and the source gateway station via the satellite. In this process, the source gateway station determines whether to switch the gateway station by comparing the quality of the link from the source gateway station to the terminal device via the satellite and the target gateway station to the terminal device via the satellite to determine whether the gateway station should be switched to improve communication quality.
  • the first channel quality and the second channel quality are compared with the second threshold.
  • the first threshold may be 12dB
  • the second threshold may be 10dB
  • the second threshold is a threshold used by the source gateway station to determine whether to perform gateway station handover or satellite handover.
  • the embodiment of the present application does not limit the magnitude relationship and value between the first threshold and the second threshold.
  • the source gateway station switches the terminal equipment from the source gateway station to the target gateway station.
  • the handover can be at the terminal equipment level, cell level, or beam coverage area level. Among them, the terminal equipment level refers to switching only one terminal equipment from the source gateway to the target gateway.
  • cell-level handover refers to switching all terminal equipment in the cell where the terminal equipment is located to the target gateway.
  • Coverage level handover refers to handover all terminal equipment in the beam coverage area where the terminal equipment is located to the target gateway station, and the cell or beam coverage area that needs to be handed over is called the target area. Adopt this kind of scheme, realize the goal of the customs station handover of terminal equipment level, cell level or beam coverage area level.
  • the gateway When the quality of the first channel is less than the second threshold and the quality of the second channel is less than the second threshold, it indicates that the quality of the two feeder links is very poor. At this time, if the gateway is switched, the overall link cannot be improved (terminal Equipment-satellite-customs station) quality. Therefore, it is necessary to perform satellite handover for the terminal equipment.
  • the handover can be at the terminal equipment level, cell level, or beam coverage area level. Among them, the terminal equipment level means that only one terminal equipment is switched from satellite 1 to satellite 2.
  • Cell-level handover refers to switching all terminal equipment in the cell where the terminal equipment is located from satellite 1 to 2
  • beam coverage level handover refers to switching all terminal equipment in the beam coverage area where the terminal equipment is located from satellite 1 to Satellite 2
  • the cell or beam coverage area that needs to be switched is called the target area.
  • Adopt this kind of scheme realize the goal of the satellite handover of terminal equipment level, cell level or beam coverage area level.
  • different beam coverage areas can be distinguished according to bandwidth part (BWP), transmission configuration indicator (TCI), or synchronization signal block (SSB). That is to say, when satellite handover or gateway handover is a beam coverage area handover, the beam coverage area can be indicated according to BWP, TCI or SSB.
  • BWP bandwidth part
  • TCI transmission configuration indicator
  • SSB synchronization signal block
  • the BWP, TCI, or SSB can be switched between the terminal equipment and the source gateway to instruct the switching of the beam coverage area, so for the terminal equipment or the source gateway, what is actually done may be BWP, TCT or SSB. Switch.
  • the beams in the embodiments of the present application can also be replaced with BWP, TCI, SSB, or the like.
  • the satellite will not always forward the signals of all cells/beam coverage areas to all gateway stations. In general, only the signal of the beam coverage area/cell served by the gateway station will be forwarded. That is to say, for the source gateway station, the satellite will only forward the terminals in the beam coverage area/cell served by the source gateway station. The signal of the equipment will not be forwarded to the target gateway at the same time; in the same way, the satellite will not forward the signal of the terminal equipment in the beam coverage area/cell served by the target gateway to the source gateway.
  • the satellite is required to forward the uplink reference signal or uplink signal from the terminal device to the target gateway station, so that the target gateway station can use the uplink reference signal or uplink signal to obtain The quality of the second channel is fed back to the source gateway.
  • the following describes in detail how the target gateway station detects the quality of the second channel.
  • the earth station works cooperatively to send instructions to the satellite 1 so that the satellite 1 sends the uplink reference signal from the terminal equipment to the target gateway station and the source gateway station.
  • the satellite 1 is caused to send the uplink reference signal from other terminal equipment in the cell or beam coverage area where the terminal equipment device is located to the target gateway station and the source gateway station.
  • the delay caused by the earth station sending instructions to the satellite when the source gateway station configures the transmission resources for the terminal equipment to send uplink reference signals, the delay caused by the earth station sending instructions to the satellite needs to be considered. So as to reserve the most time for the satellite to receive the relevant instructions.
  • the earth station controls the satellite to send uplink reference signals to multiple gateway stations, which can be easily understood from the perspective of ports.
  • the satellite receives the uplink reference signal from the terminal equipment from port 1, and forwards it from port 10 to the source gateway, and from port 11 to the target gateway.
  • the source gateway station can trigger the satellite to send instructions to the earth station, so that the satellite sends the uplink reference signal to multiple gateway stations.
  • the source gateway station may directly send the fourth instruction information to the satellite to instruct the satellite to send uplink reference signals to multiple gateway stations.
  • the earth station can also be pre-configured according to the weather, etc., so that the earth station sends instructions to the satellite according to the pre-configuration. For example, according to the weather forecast, there will be heavy rain from 3 pm to 6 pm on a certain day of a certain year. Therefore, the earth station is pre-configured to send instructions to the satellite from 3 pm to 6 pm on a certain day of a certain year. , The pre-configured source gateway will also interact with the target gateway at 3-6 pm on a certain day of a certain year and month.
  • the source gateway station may pre-configure transmission resources, that is, the source gateway station sends the second indication information to the terminal device via the satellite.
  • the second indication information is used to indicate the transmission resource for transmitting the uplink reference signal.
  • the second indication information can be configured in a bandwidth part (Bandwidth Part, BWP), for example, a new signaling is added to the BWP-uplink dedicated signaling (BWP-uplink dedicated), namely DGWS-config, use this new signaling to configure transmission resources.
  • BWP bandwidth part
  • transmission resources can also be configured through RRC signaling.
  • the source gateway station When the source gateway station pre-configures transmission resources, it can configure the transmission resources used to transmit uplink reference signals at the level of terminal equipment, beam coverage, or cell.
  • the transmission resources are configured at the terminal device level, the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword, or different transmission resources. That is to say, the time domain resources and/or frequency domain resources of the transmission resources of different terminal devices are different, but the codewords may be the same or different.
  • the source gateway station and the target gateway station will not receive the uplink reference signals sent by different terminal devices on the same transmission resource. Using this kind of scheme, realize the goal that the source gateway station uses the terminal equipment as the unit to configure the transmission resource.
  • the transmission resources of different terminal devices in the same beam coverage area or cell are transmission resources with the same time-frequency domain resources and different codewords.
  • the transmission resources of the terminal devices in the same beam coverage area or cell have the same time domain resources and the same frequency domain resources, but the codewords of each terminal device are different, and the source gateway can configure each terminal device Different codewords can also be configured with a codeword candidate pool, and the terminal device randomly selects codewords in the candidate pool. In this way, diversity gain can be avoided.
  • different terminal devices have different transmission resources, and may also be different in polarization mode, multi-antenna transmission mode, time domain, frequency domain, codeword, beam, etc.
  • the source gateway station when the source gateway station actively triggers the gateway station handover, the source gateway station sends the third indication information to the target gateway station, and at the same time triggers the terminal device to send the uplink reference signal to the satellite, and the uplink reference signal is forwarded by the satellite
  • the source gateway station uses the uplink reference signal to determine the first channel quality
  • the target gateway station uses the uplink reference signal to determine the second channel quality.
  • the source gateway station can use the uplink signal, such as the uplink data signal or the uplink reference signal, to determine the first channel quality before the terminal device sends the uplink reference signal.
  • the satellite After the satellite receives the uplink reference signal sent by the terminal device, it can also send the uplink reference signal only to the target gateway station instead of the source gateway station. If it is sent to the source gateway station and the target gateway station at the same time, the source gateway station uses the uplink reference signal to determine the first channel quality again, and subsequently uses the new first channel quality and second channel quality to determine whether to switch the gateway station, Alternatively, the source gateway station uses the average value of the first channel quality obtained by two measurements and the second channel quality to determine whether to switch the gateway station, etc., which is not limited in the embodiment of the present application.
  • the satellite forwards the uplink reference signal to the source gateway and the target gateway. There are two situations:
  • the terminal device explicitly indicates to the source gateway that the quality of the first channel is lower than the first threshold.
  • the first indication information is 1-bit information, and 0 means that the quality of the first channel is lower than the first threshold. 1 indicates that the quality of the first channel is higher than the first threshold, and only when the first indication information is 0, the terminal device sends the first indication information to the source gateway station through the satellite.
  • the terminal device after the terminal device sends the first indication information, it sends the uplink reference signal under the trigger of the source gateway; or the terminal device waits for a certain period of time and actively sends the uplink reference signal to the satellite on the pre-configured transmission resources,
  • the transmission resource is the resource configured by the source gateway station for the terminal device to send the uplink reference signal.
  • the second case the terminal device implicitly indicates to the source gateway station that the quality of the first channel is lower than the first threshold.
  • the terminal device and the source gateway station pre-appoint an uplink reference signal of a special format.
  • the uplink reference signal of the special format is sent to the satellite on the transmission resource.
  • the satellite forwards the uplink reference signal of the special format to the source gateway station and the target gateway station.
  • the source gateway station uses the uplink reference signal to determine the first channel quality
  • the target gateway station uses the uplink reference signal to determine the second channel quality.
  • the terminal device does not need to send the uplink reference signal after sending the first indication information, which reduces the number of times the terminal device sends signals.
  • a commonly used uplink reference signal can also be used to replace the uplink reference signal of the special format.
  • the uplink sounding reference signal sounding reference signal, SRS
  • the dedicated modulation reference signal demodulation reference signal, DMRS
  • the above-mentioned function of triggering the gateway switch by the terminal device does not need to be turned on all the time, but only when the weather is bad. . That is to say, when the weather is abnormal, the source gateway station sends an activation instruction to the terminal device. The activation instruction is used to activate the terminal device to trigger the gateway switch function. After that, the terminal device detects the quality of the downlink signal. When the value is lower than the first threshold, the first indication information is sent to the source gateway through the satellite.
  • a third situation can also be derived: after the source gateway station sends an activation instruction to the terminal device through the satellite, regardless of whether the terminal device sends the first instruction information, the satellite will send the source gateway station and the target gateway station on the transmission resource. Forward the uplink signal from the terminal equipment, such as the uplink reference signal or the uplink data signal, so that the source gateway station uses the uplink signal to determine the first channel quality, and the target gateway station uses the uplink signal to determine the second channel quality.
  • the satellite forwards the uplink reference signal sent by the terminal device only on the premise that the terminal device sends the first indication information.
  • the transmission resource is the resource configured by the source gateway station for the terminal device to send the uplink reference signal.
  • the satellite since the source gateway station sends the activation instruction to the terminal device through the satellite, even if the terminal device has not sent the first indication information, the satellite will forward the source gateway station and the target gateway station on the transmission resources from the terminal device. Uplink signal of the device.
  • the transmission resource can be used to send an uplink data signal. If the source gateway station and the target gateway station detect the uplink data signal on the transmission resource, there is no need to measure the channel quality; if the source gateway station and the target gateway station detect the uplink reference signal on the transmission resource, the channel is executed Quality measurement.
  • FIG. 4 is a flowchart of another gateway switching method provided by an embodiment of the present application, including:
  • the source gateway station sends at least one of a first threshold, an activation instruction, a target number of times N, and an interval duration T to a terminal device through a satellite.
  • the activation instruction is used to instruct the terminal device to send the uplink reference signal when the quality of the downlink signal is lower than the first threshold, and the target number of times N is used to instruct the terminal device to send the uplink reference The number of times of the signal, the interval duration T is used to indicate the duration between when the terminal device sends the uplink reference signal N times and then detects the quality of the downlink signal again, where N ⁇ 1 and is an integer.
  • the source gateway station sends an activation instruction to the terminal device via satellite in a broadcast, multicast, or unicast manner according to the weather forecast or actual weather conditions.
  • the activation instruction is used to instruct the terminal device to activate the gateway switch function, that is, once The terminal device sends the uplink reference signal when detecting that the quality of the downlink signal is lower than the first threshold.
  • DGS dynamic gateway switch
  • the source gateway station When the source gateway station sends an activation instruction to the terminal device, it can also send the target number of times N, the first threshold (threshold1), the target number of times N, or the interval duration, etc., to the terminal device.
  • the source gateway station carries at least one of the first threshold, the activation instruction, the target number of times N, and the interval time T in the broadcast information, and sends it to the terminal device via satellite.
  • the broadcast information may be a system information block (SIB). ), other system information (other system information, OSI), main system information block (mater information block, MIB), etc.
  • the source gateway station can also carry at least one of the first threshold, the activation instruction, the target number of times N, and the interval time T in the connection state.
  • State information is sent to the terminal device.
  • the connected state information includes RRC information, downlink control information (DCI), group DCI, media access control (MAC) element, and timing advance command ( At least one of timing advance command, TAC).
  • the source gateway station sends at least one of the first threshold, the activation instruction, the target number of times N, and the interval time T to the terminal device through a physical downlink shared data channel (Physical Downlink Shared Channel, PDSCH).
  • PDSCH Physical Downlink Shared Channel
  • the source gateway station may send a new first threshold value, etc. to update the first threshold value to change the trigger frequency of the terminal device sending the uplink reference signal, which can prevent false triggering and save the energy of the terminal device.
  • the source gateway station sends the second instruction information to the terminal device via the satellite.
  • the terminal device receives second indication information from the source gateway station and forwarded via satellite, the second indication information is used to indicate the transmission resource for transmitting the uplink reference signal, and the uplink reference signal is used to detect the quality of the first channel .
  • step 204 is executed; if the terminal device does not enable the trigger gateway switching function, then step 212 is executed.
  • the terminal device determines whether the quality of the downlink signal is lower than the first threshold. If the quality of the downlink signal is lower than the first threshold, step 205 is executed; if the quality of the downlink signal is equal to or higher than the first threshold, step 203 is executed.
  • the downlink signal quality may be the signal to noise ratio (SNR), the bit energy to noise power spectral density ratio (Eb/N0), and the reference signal obtained based on the downlink reference signal or the downlink data signal.
  • Received power reference signal received power, RSRP
  • channel quality indicator channel quality indicator, CQI
  • signal to interference plus noise power ratio SINR
  • reference signal received quality RSRQ
  • decoding performance such as packet loss rate, etc.
  • the downlink reference signal may be a demodulation reference signal (DMRS), a phase tracking reference signal (PTRS), a channel state information reference signal (Channel State Information-Reference Signal, CSI-RS), etc. .
  • the terminal device sends an uplink reference signal to the satellite.
  • the uplink reference signal may be an uplink sounding reference signal (sounding reference signal, SRS), a demodulation reference signal (demodulation reference signal, DMRS), a phase tracking reference signal (phase tracking reference signal, PTRS), etc.
  • SRS sounding reference signal
  • DMRS demodulation reference signal
  • PTRS phase tracking reference signal
  • the satellite forwards the uplink reference signal to the source gateway.
  • the satellite forwards the uplink reference signal to the target gateway.
  • step 206 there is no strict sequence between step 206 and step 207.
  • the source gateway station uses the uplink reference signal to determine the first channel quality.
  • the target gateway station uses the uplink reference signal to determine the second channel quality.
  • the target gateway station sends the second channel quality to the source gateway station.
  • the source gateway station uses the first channel quality and the second channel quality to determine whether to switch the terminal device to the target gateway station.
  • the first channel quality is greater than or equal to the second threshold, it means that there is no problem with the link between the terminal device and the source gateway via the satellite, and no gateway switching or satellite switching is performed. If the quality of the first channel is less than the second threshold, it means that the link between the terminal device and the source gateway via the satellite has a quality problem, and satellite switching or gateway switching is required.
  • the terminal device is switched from the source gateway to the target gateway, or each terminal device in the cell or beam coverage area where the terminal device is located is removed from the source gateway Switch to the target gateway; if the second channel quality is less than the second threshold, perform satellite handover to the terminal device, or perform satellite handover to the terminal device in the cell or beam coverage area where the terminal device is located.
  • the terminal device does not detect the quality of the downlink signal.
  • FIG. 5 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • the communication device involved in this embodiment may be a terminal device or a chip applied to the terminal device.
  • the communication device can be used to perform the functions of the terminal device in the above-mentioned embodiments.
  • the communication device 100 may include:
  • the processing unit 11 is configured to detect that the quality of the downlink signal from the source gateway and forwarded via the satellite is lower than the first threshold
  • the transceiver unit 12 is configured to send first indication information to the source gateway, where the first indication information is used to indicate that the first channel quality is lower than the first threshold, and the first channel quality is used to characterize the The quality of the link between the terminal equipment via the satellite and the source gateway.
  • the transceiver unit 12 after sending the first indication information to the source gateway, is also used to send an uplink reference signal to the satellite, and the uplink reference signal is used for the source signal
  • the gateway detects the first channel quality
  • the target gateway detects the second channel quality
  • the second channel quality is used to characterize the quality of the link between the terminal device and the target gateway via satellite .
  • the first indication information is an uplink reference signal
  • the uplink reference signal is used for the source gateway station to detect the first channel quality
  • the target gateway station to detect the second channel quality
  • the second channel quality is used to characterize the quality of the link between the terminal device and the target gateway via the satellite.
  • the transceiver unit 12 is also used to receive signals from the source gateway before the processing unit 11 detects that the quality of the downlink signal from the source gateway station and forwarded by the satellite is lower than the first threshold. At least one of the first threshold, the activation instruction, the target number of times N, and the interval time T that are forwarded via the satellite, wherein the activation instruction is used to indicate that the quality of the downlink signal of the terminal device is lower than that of the terminal device.
  • the uplink reference signal is sent at the first threshold, the target number of times N is used to indicate the number of times the terminal device sends the uplink reference signal, and the interval duration T is used to instruct the terminal device to send N uplink references
  • the length of time between after the signal is sent and the quality of the downlink signal is detected again, where N ⁇ 1 and is an integer.
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval time T is carried in broadcast information
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval duration T is carried in connected state information, and the connected state information includes RRC information, downlink control information DCI, and group DCI , At least one of media access control MAC element and timing advance command TAC;
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval duration T is sent through a physical downlink shared data channel.
  • the transceiver unit 12 is further configured to receive second indication information sent by the source gateway station via the satellite, and the second indication information is used to indicate the transmission resource of the uplink reference signal .
  • the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword or different transmission resources;
  • the transmission resources of different terminal devices in the same beam coverage area or cell are transmission resources with the same time-frequency domain resources and different codewords.
  • the communication device provided in the embodiment of the present application can perform the actions of the terminal device in the foregoing embodiment, and its implementation principles and technical effects are similar, and details are not described herein again.
  • FIG. 6 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • the communication device involved in this embodiment may be a source gateway or a chip applied to a source gateway.
  • the communication device can be used to perform the functions of the source gateway in the above-mentioned embodiment.
  • the communication device 200 may include:
  • the sending unit 21 is configured to send third indication information to a target gateway station, where the third indication information is used to instruct the target gateway station to feed back a second channel quality to the source gateway station, and the second channel quality It is used to characterize the quality of the link from the terminal device to the target gateway via satellite;
  • the receiving unit 22 is configured to receive the second channel quality from the target gateway station
  • the processing unit 23 is configured to use the second channel quality and the first channel quality to determine whether to switch the terminal device to the target gateway station, and the first channel quality is used to characterize the terminal device via satellite The quality of the link to the source gateway.
  • the processing unit 23 is further configured to determine that the quality of the first channel is lower than a first threshold before the sending unit 21 sends the third indication information to the target gateway station.
  • the receiving unit 22 is further configured to receive the first instruction from the terminal device and forwarded via the satellite before the sending unit 21 sends the third instruction information to the target gateway.
  • Information, the first indication information is used to indicate that the channel quality of the link from the terminal device to the source gateway via the satellite is lower than a first threshold.
  • the uplink reference signal is also used for the source gateway station to detect the first channel quality and the target signal The gateway station detects the quality of the second channel.
  • the sending unit 21 before the receiving unit 22 receives the first indication information from the terminal device and forwarded via the satellite, the sending unit 21 is also configured to send the terminal device to the terminal device through the satellite. Send at least one of the first threshold, the activation instruction, the target number of times N, and the interval time T, where the activation instruction is used to instruct the terminal device to send the terminal device when the quality of the downlink signal is lower than the first threshold.
  • the target number of times N is used to indicate the number of times the terminal device sends the uplink reference signal
  • the interval duration T is used to instruct the terminal device to send the uplink reference signal N times until the downlink signal is detected again
  • the length of time between masses, said N ⁇ 1 and is an integer.
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval time T is carried in broadcast information
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval duration T is carried in connected state information, and the connected state information includes RRC information, downlink control information DCI, and group DCI , At least one of media access control MAC element and timing advance command TAC;
  • At least one of the first threshold, the activation instruction, the target number of times N, and the interval duration T is sent through a physical downlink shared data channel.
  • the processing unit 23 when the first channel quality is less than a second threshold and the second channel quality is greater than or equal to the second threshold, the processing unit 23 is configured to remove the terminal device from The source gateway is switched to the target gateway; or, when the first channel quality is less than a second threshold and the second channel quality is greater than or equal to the second threshold, the processing unit 23 , For switching each terminal device in a target area from the source gateway to the target gateway, the target area is the cell or beam coverage area where the terminal device is located, and the cell includes at least one beam Coverage area, the cell is included in the coverage area of the satellite.
  • the processing unit 23 when the first channel quality is less than a second threshold and the second channel quality is less than the second threshold, the processing unit 23 is configured to perform satellite handover on the terminal device Or, when the first channel quality is less than the second threshold and the second channel quality is less than the second threshold, the processing unit 23 is configured to perform satellite handover for each terminal device in the target area,
  • the target area is a cell or a beam coverage area where the terminal device is located, the cell includes at least one beam coverage area, and the cell is included in the coverage area of the satellite.
  • the sending unit 21 is further configured to send the second channel quality to the terminal device via the satellite before the receiving unit 22 receives the second channel quality from the target gateway.
  • Two indication information where the second indication information is used to indicate a transmission resource for transmitting an uplink reference signal, and the uplink reference signal is used to detect the first channel quality.
  • the third indication information is also used to indicate a transmission resource where an uplink reference signal is located, and the uplink reference signal is used to detect the first channel quality.
  • the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword or different transmission resources; or, the transmission resources in the same beam coverage area or cell
  • the transmission resources of different terminal devices are transmission resources with the same time-frequency domain resources and different codewords.
  • the sending unit 21 is further configured to send fourth indication information to the satellite, and the fourth indication information is used to instruct the satellite to send the uplink reference signal to the source signal.
  • the communication device provided in the embodiment of the present application can perform the actions of the source gateway in the foregoing embodiment, and its implementation principles and technical effects are similar, and will not be repeated here.
  • FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • the communication device involved in this embodiment may be a target gateway station or a chip applied to the target gateway station.
  • the communication device can be used to perform the function of the target gateway in the above-mentioned embodiment.
  • the communication device 300 may include:
  • the receiving unit 31 is configured to receive third indication information sent by the source gateway station, where the third indication information is used to instruct the target gateway station to feed back a second channel quality to the source gateway station, and the second channel quality It is used to characterize the quality of the link from the terminal device to the target gateway via satellite;
  • the processing unit 32 is configured to determine the second channel quality
  • the sending unit 33 is configured to send the second channel quality to the source gateway station.
  • the receiving unit 31 is further configured to receive an uplink reference signal from the terminal device and forwarded via the satellite;
  • the processing unit 32 is configured to determine the second channel quality according to the uplink reference signal.
  • the third indication information is also used to indicate a transmission resource where an uplink reference signal is located, and the uplink reference signal is used to detect the first channel quality.
  • the transmission resources of different terminal devices in the same beam coverage area or cell are mutually different time-frequency domain resources, the same codeword or different transmission resources; or, the transmission resources in the same beam coverage area or cell
  • the transmission resources of different terminal devices are transmission resources with the same time-frequency domain resources and different codewords.
  • the communication device provided in the embodiment of the present application can perform the actions of the target gateway in the foregoing embodiment, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the above receiving unit may be a receiver when actually implemented, the sending unit may be a transmitter when actually implemented, and the transceiver unit may be a transceiver.
  • the processing unit can be implemented in the form of software called by processing elements; it can also be implemented in the form of hardware.
  • the processing unit may be a separate processing element, or it may be integrated in a chip of the above-mentioned device for implementation.
  • it may also be stored in the memory of the above-mentioned device in the form of program code, and a certain processing element of the above-mentioned device Call and execute the functions of the above processing unit.
  • all or part of these units can be integrated together or implemented independently.
  • the processing element described here may be an integrated circuit with signal processing capability. In the implementation process, each step of the above method or each of the above units can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software.
  • the above units may be one or more integrated circuits configured to implement the above methods, such as: one or more application specific integrated circuits (ASIC), or one or more microprocessors (digital signal processor, DSP), or, one or more field programmable gate arrays (FPGA), etc.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • FPGA field programmable gate arrays
  • the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program codes.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of this application. As shown in FIG. 8, the communication device 400 includes:
  • the memory 42 stores computer execution instructions
  • the processor 41 executes the computer-executable instructions stored in the memory 42, so that the processor 41 executes the gateway switching method executed by the above terminal device; or causes the processor 41 to execute the information executed by the above source gateway.
  • a gateway switching method; or, the processor 41 is caused to execute the gateway switching method performed by the target gateway station as described above.
  • the communication device 400 further includes a communication interface 43.
  • the processor 41, the memory 42 and the communication interface 43 may be connected through a bus 44.
  • the memory and the processor are directly or indirectly electrically connected to realize data transmission or interaction, that is, the memory and the processor can be connected through an interface or integrated.
  • these elements may be electrically connected to each other through one or more communication buses or signal lines, for example, they may be connected through a bus.
  • the memory stores computer execution instructions for implementing the data access control method, including at least one software function module that can be stored in the memory in the form of software or firmware.
  • the processor executes various software programs and modules by running the software programs and modules stored in the memory. Functional application and data processing.
  • the memory can be, but not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM) ), Erasable Programmable Read-Only Memory (EPROM), Electrical Erasable Programmable Read-Only Memory (EEPROM), etc.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrical Erasable Programmable Read-Only Memory
  • the memory is used to store the program, and the processor executes the program after receiving the execution instruction.
  • the software programs and modules in the aforementioned memory may also include an operating system, which may include various software components and/or drivers for managing system tasks (such as memory management, storage device control, power management, etc.), and may Communicate with various hardware or software components to provide an operating environment for other software components.
  • the processor can be an integrated circuit chip with signal processing capabilities.
  • the foregoing processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), and so on.
  • 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 present application also provides a chip including: a logic circuit and an input interface, wherein: the input interface is used to obtain the data to be processed; the logic circuit is used to execute the foregoing method embodiment on the data to be processed In the technical solution on the terminal device side, the processed data is obtained.
  • the chip may further include: an output interface for outputting processed data.
  • the data to be processed obtained by the input interface includes downlink signals, second indication information, etc.
  • the processed data output by the output interface includes first indication information, uplink reference signals, and so on.
  • the present application also provides a chip, including: a logic circuit and an output interface, wherein: the logic circuit is used to execute the technical solution at the source gateway side in the foregoing method embodiment for the data to be processed to obtain the processed data; and, The output interface is used to output processed data.
  • the chip further includes: an input interface, which is used to obtain the data to be processed.
  • the data to be processed obtained by the input interface includes uplink data signals, uplink reference signals, and so on.
  • the processed data output by the output interface includes second instruction information, third instruction information, and so on.
  • the present application also provides a chip, including: a logic circuit and an output interface, wherein: the logic circuit is used to execute the technical solution at the target gateway side in the foregoing method embodiment for the data to be processed to obtain the processed data; and , The output interface is used to output processed data.
  • the chip further includes: an input interface, which is used to obtain the data to be processed.
  • the data to be processed obtained by the input interface includes uplink reference signals and so on.
  • the processed data output by the output interface includes the second channel quality and so on.
  • the present application also provides a computer-readable storage medium, where the computer-readable storage medium is used to store a program, and the program is used to execute the technical solution on the terminal device side in the foregoing embodiment when the program is executed by the processor.
  • the present application also provides a computer-readable storage medium for storing a program, and when the program is executed by a processor, it is used to execute the technical solution on the source gateway side in the foregoing embodiment.
  • the present application also provides a computer-readable storage medium, where the computer-readable storage medium is used to store a program, and when the program is executed by a processor, it is used to execute the technical solution on the target gateway side in the foregoing embodiment.
  • the embodiments of the present application also provide a computer program product, which when the computer program product runs on a communication device, causes the communication device to execute the technical solutions on the terminal device side in the foregoing embodiments; or, causes the communication device to execute The technical solution of the source gateway in the foregoing embodiment; or, the communication device is caused to execute the technical solution of the target gateway in the foregoing embodiment
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program executes the steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program code.
  • the specific medium type is not limited in this application. .

Abstract

本申请实施例提供一种信关站切换方法及装置,当终端设备经由卫星至源信关站之间的链路质量差时,源信关站向目标信关站发送第三指示信息,使得目标信关站向源信关站反馈第二信道质量,即终端设备经由所述卫星至所述目标信关站的链路的质量。源信关站利用该第二信道质量和用于表征终端设备经由卫星至源信关站之间的链路质量的第一信道质量,确定是否将所述终端设备切换至所述目标信关站。该过程中,源信关站通过对比源信关站经由卫星到终端设备的链路、目标信关站经由卫星至终端设备的链路的质量,确定出是否该切换信关站,提高通信质量。

Description

信关站切换方法及装置
本申请要求申请于2020年03月03日提交中国专利局、申请号为202010140332.5、申请名称为《信关站切换方法及装置》的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及卫星通信技术领域,尤其涉及一种信关站切换方法及装置。
背景技术
第五代移动通信(the 5th generation mobile communication,5G)技术引入非陆地网络(non terrestrial network,NTN),通过将基站或基站的部分功能部署在高空平台或卫星上,为终端设备(user equipment,UE)提供覆盖,具有覆盖范围大、组网灵活等特点。
NTN通信中,终端设备与信关站之间的链路包括两部分:终端设备与卫星之间的服务链路,以及卫星与信关站之间的馈电链路,卫星的主要功能包括透传等。由此,若终端设备与信关站之间的整体链路出现质量问题,则有可能是服务链路质量差、馈电链路质量差、服务链路和馈电链路均质量差。当馈电链路出现问题时,常见的解决方法是切换信关站。
传统陆地网络的链路质量检测方法中,终端设备向基站发送上行参考信号,基站基于该上行参考信号的质量,判断终端设备与基站之间链路的质量。显然,若NTN通信继续沿用该传统的链路质量检测方法,则当信关站确定出终端设备经由卫星至信关站之间的链路质量差时,则无法进一步的确定出:究竟是馈电链路质量差还是服务链路质量差,进而无法确定是否该切换信关站,导致通信质量差。
发明内容
本申请实施例提供一种信关站切换方法及装置,通过对比源信关站经由卫星到终端设备的链路、目标信关站经由卫星至终端设备的链路的质量,确定出是否该切换信关站,提高通信质量。
第一方面,本申请实施例提供一种信关站切换方法,该方法可以应用于终端设备、也可以应用于终端设备中的芯片,下面以应用于终端设备为例对该方法进行描述,该方法包括:终端设备检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值,则向源信关站发送第一指示信息,该第一指示信息用于指示第一信道质量低于第一阈值,该第一信道质量用于表征该终端设备经由卫星至该源信关站之间的链路的质量。采用该种方案,实现由终端设备触发信关站切换的目的。
一种可行的设计中,终端设备向该源信关站发送第一指示信息之后,还向该卫星发送上行参考信号,该上行参考信号用于供该源信关站检测该第一信道质量,以及目 标信关站检测第二信道质量,该第二信道质量用于表征该终端设备经由卫星至该目标信关站之间的链路的质量。采用该种方案,通过向卫星发送上行参考信号并由卫星转发给相应的信关站,实现信关站确定出信道质量的目的。
一种可行的设计中,上述的第一指示信息为上行参考信号,该上行参考信号用于供源信关站检测第一信道质量,以及所目标信关站检测第二信道质量,第二信道质量用于表征该终端设备经由该卫星至该目标信关站之间的链路的质量。采用该种方案,无需终端设备发送第一指示信息后再发送上行参考信号,减少终端设备发送信号的次数。
一种可行的设计中,终端设备检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值之前,还接收来自源信关站且经由卫星转发的第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,其中,激活指令用于指示终端设备在下行信号的质量低于第一阈值时发送上行参考信号,目标次数N用于指示终端设备发送上行参考信号的次数,间隔时长T用于指示终端设备发送N次上行参考信号后至再次检测下行信号质量之间的时长,N≥1且为整数。采用该种方案,实现源信关站控制终端设备是否开启信关站功能的目的。
一种可行的设计中,第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,携带在广播信息中;或者,第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,携带在连接态信息中,连接态信息包括RRC信息、下行控制信息DCI、组DCI、介质访问控制MAC元素、定时提前命令TAC中的至少一个种;或者,第一阈值、激活指令、目标次数N、间隔时长T中的至少一个通过物理下行共享数据信道发送。采用该种方法,实现灵活发送激活指令、目标次数N或间隔时长T的目的。
一种可行的设计中,上述的方法还包括:终端设备接该源信关站经由卫星发送的第二指示信息,该第二指示信息用于指示上行参考信号的传输资源。采用该种方案,实现灵活向终端设备配置传输资源的目的。
一种可行的设计中,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源;或者,同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。采用该种方案,实现源信关站识别出不同终端设备发送的上行参考信号的目的。
第二方面,本申请实施例提供一种信关站切换方法,该方法可以应用于源信关站、也可以应用于源信关站中的芯片,下面以应用于源信关站为例对该方法进行描述,该方法包括:当终端设备经由卫星至源信关站之间的链路质量差时,源信关站向目标信关站发送第三指示信息,使得目标信关站向源信关站反馈第二信道质量,即终端设备经由所述卫星至所述目标信关站的链路的质量。源信关站利用该第二信道质量和用于表征终端设备经由卫星至源信关站之间的链路质量的第一信道质量,确定是否将所述终端设备切换至所述目标信关站。采用该种方案,源信关站通过对比源信关站经由卫星到终端设备的链路、目标信关站经由卫星至终端设备的链路的质量,确定出是否该切换信关站,提高通信质量。
一种可行的设计中,源信关站向目标信关站发送第三指示信息之前,还确定出该第一信道质量低于第一阈值。采用该种方案,实现源信关站主动触发信关站切换的目 的。
一种可行的设计中,源信关站向目标信关站发送第三指示信息之前,还接收来自该终端设备且经由卫星转发的第一指示信息,该第一指示信息用于指示终端设备经由卫星至源信关站的链路的信道质量低于第一阈值。采用该种方案,实现终端设备主动触发信关站切换的目的。
一种可行的设计中,当第一指示信息为预设结构的上行参考信号时,该上行参考信号还用于供源信关站检测第一信道质量,以及所目标信关站检测第二信道质量。采用该种方案,无需终端设备发送第一指示信息后再发送上行参考信号,减少终端设备发送信号的次数。
一种可行的设计中,源信关站接收来自终端设备且经由卫星转发的第一指示信息之前,还通过卫星向终端设备发送第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,其中,激活指令用于指示终端设备在下行信号的质量低于第一阈值时发送上行参考信号,目标次数N用于指示终端设备发送上行参考信号的次数,间隔时长T用于指示终端设备发送N次上行参考信号后至再次检测下行信号质量之间的时长,N≥1且为整数。采用该种方案,实现源信关站控制终端设备是否开启信关站功能的目的。
一种可行的设计中,第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,携带在广播信息中;或者,第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,携带在连接态信息中,连接态信息包括RRC信息、下行控制信息DCI、组DCI、介质访问控制MAC元素、定时提前命令TAC中的至少一个种;或者,第一阈值、激活指令、目标次数N、间隔时长T中的至少一个通过物理下行共享数据信道发送。采用该种方法,实现灵活发送激活指令、目标次数N或间隔时长T的目的。
一种可行的设计中,源信关站利用第二信道质量和第一信道质量,确定是否将终端设备切换至目标信关站的过程中:当第一信道质量小于第二阈值、且第二信道质量大于或等于第二阈值时,源信关站将终端设备从源信关站切换至目标信关站;或者,当第一信道质量小于第二阈值、且第二信道质量大于或等于第二阈值时,源信关站将目标区域内的各终端设备从源信关站切换至目标信关站,目标区域为终端设备所在的小区或波束覆盖区,小区包含至少一个波束覆盖区,小区包含于卫星的覆盖范围内。采用该种方案,实现终端设备级别、小区级别或波束覆盖区级别的信关站切换的目的。
一种可行的设计中,上述的方法还包括:当第一信道质量小于第二阈值、且第二信道质量小于第二阈值时,源信关站对终端设备执行卫星切换;或者,当第一信道质量小于第二阈值、且第二信道质量小于第二阈值时,源信关站对目标区域内的各终端设备执行卫星切换,目标区域为终端设备所在的小区或波束覆盖区,小区包含至少一个波束覆盖区,小区包含于卫星的覆盖范围内。采用该种方案,实现终端设备级别、小区级别或波束覆盖区级别的卫星切换的目的。
一种可行的设计中,源信关站接收来自目标信关站的第二信道质量之前,还经由该卫星向终端设备发送第二指示信息,第二指示信息用于指示传输上行参考信号的传输资源,上行参考信号用于检测第一信道质量。采用该种方案,实现源信关站灵活向终端设备配置传输资源的目的。
一种可行的设计中,上述的第三指示信息还用于指示上行参考信号所在的传输资源,该上行参考信号用于检测第一信道质量。采用该种方案,实现源信关站向目标信关站指示上行参考信号的传输资源的目的。
一种可行的设计中,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源;或者,同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。采用该种方案,实现源信关站识别出不同终端设备发送的上行参考信号的目的。
一种可行的设计中,上述的方法还包括:源信关站向卫星发送第四指示信息,该第四指示信息用于指示卫星将上行参考信号发送给源信关站和目标信关站。采用该种方案,实现源信关站触发卫星向多个信关站转发来自终端设备的信号的目的。
第三方面,本申请实施例提供一种信关站切换方法,该方法可以应用于目标信关站、也可以应用于目标信关站中的芯片,下面以应用于目标信关站为例对该方法进行描述,该方法包括:目标信关站接收源信关站发送的第三指示信息,该第三指示信息用于指示目标信关站向源信关站反馈第二信道质量,该第二信道质量用于表征终端设备经由卫星至目标信关站的链路的质量。之后,目标信关站确定第二信道质量,向该源信关站发送所第二信道质量。采用该种方案,实现目标信关站向源信关站反馈第二信道质量的目的。
一种可行的设计中,目标信关站确定第二信道质量时:目标信关站接收来自终端设备且经由卫星转发的上行参考信号,根据该上行参考信号,确定该第二信道质量。采用该种方案,实现目标信关站确定出第二信道质量的目的。
一种可行的设计中,上述的第三指示信息还用于指示上行参考信号所在的传输资源,该上行参考信号用于检测第一信道质量。采用该种方案,实现源信关站向目标信关站指示上行参考信号的传输资源的目的。
一种可行的设计中,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源;或者,同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。采用该种方案,实现目标信关站识别出不同终端设备发送的上行参考信号的目的。
第四方面,本申请实施例提供一种通信装置,包括:
处理单元,用于检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值;
收发单元,用于向所述源信关站发送第一指示信息,所述第一指示信息用于指示第一信道质量低于所述第一阈值,所述第一信道质量用于表征所述终端设备经由卫星至所述源信关站之间的链路的质量。
一种可行的设计中,所述收发单元,在向所述源信关站发送第一指示信息之后,还用于向所述卫星发送上行参考信号,所述上行参考信号用于供所述源信关站检测所述第一信道质量,以及目标信关站检测第二信道质量,所述第二信道质量用于表征所述终端设备经由卫星至所述目标信关站之间的链路的质量。
一种可行的设计中,所述第一指示信息为上行参考信号,所述上行参考信号用于供所述源信关站检测所述第一信道质量,以及所目标信关站检测第二信道质量,所述 第二信道质量用于表征所述终端设备经由所述卫星至所述目标信关站之间的链路的质量。
一种可行的设计中,所述收发单元,在所述处理单元检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值之前,还用于接收来自所述源信关站且经由所述卫星转发的所述第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,其中,所述激活指令用于指示所述终端设备在下行信号的质量低于所述第一阈值时发送所述上行参考信号,所述目标次数N用于指示所述终端设备发送所述上行参考信号的次数,所述间隔时长T用于指示所述终端设备发送N次上行参考信号后至再次检测下行信号质量之间的时长,所述N≥1且为整数。
一种可行的设计中,所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个,携带在广播信息中;或者,
所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个,携带在连接态信息中,所述连接态信息包括RRC信息、下行控制信息DCI、组DCI、介质访问控制MAC元素、定时提前命令TAC中的至少一个种;或者,所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个通过物理下行共享数据信道发送。
一种可行的设计中,所述收发单元,还用于接收所述源信关站经由所述卫星发送的第二指示信息,所述第二指示信息用于指示所述上行参考信号的传输资源。
一种可行的设计中,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源;或者,同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。
第五方面,本申请实施例提供一种通信装置,包括:
发送单元,用于向目标信关站发送第三指示信息,所述第三指示信息用于指示所述目标信关站向所述源信关站反馈第二信道质量,所述第二信道质量用于表征终端设备经由卫星至所述目标信关站的链路的质量;
接收单元,用于接收来自所述目标信关站的所述第二信道质量;
处理单元,用于利用所述第二信道质量和第一信道质量,确定是否将所述终端设备切换至所述目标信关站,所述第一信道质量用于表征所述终端设备经由卫星至所述源信关站之间的链路的质量。
一种可行的设计中,所述处理单元,在所述发送单元向目标信关站发送第三指示信息之前,还用于确定出所述第一信道质量低于第一阈值。
一种可行的设计中,所述接收单元,在所述发送单元向目标信关站发送第三指示信息之前,还用于接收来自所述终端设备且经由所述卫星转发的第一指示信息,所述第一指示信息用于指示所述终端设备经由所述卫星至所述源信关站的链路的信道质量低于第一阈值。
一种可行的设计中,当所述第一指示信息为预设结构的上行参考信号时,所述上行参考信号还用于供所述源信关站检测所述第一信道质量,以及所目标信关站检测所述第二信道质量。
一种可行的设计中,所述发送单元,在所述接收单元接收来自所述终端设备且经 由所述卫星转发的第一指示信息之前,还用于通过所述卫星向所述终端设备发送所述第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,其中,所述激活指令用于指示所述终端设备在下行信号的质量低于所述第一阈值时发送所述上行参考信号,所述目标次数N用于指示所述终端设备发送所述上行参考信号的次数,所述间隔时长T用于指示所述终端设备发送N次上行参考信号后至再次检测下行信号质量之间的时长,所述N≥1且为整数。
一种可行的设计中,所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个,携带在广播信息中;或者,
所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个,携带在连接态信息中,所述连接态信息包括RRC信息、下行控制信息DCI、组DCI、介质访问控制MAC元素、定时提前命令TAC中的至少一个种;或者,所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个通过物理下行共享数据信道发送。
一种可行的设计中,当所述第一信道质量小于第二阈值、且所述第二信道质量大于或等于所述第二阈值时,所述处理单元,用于将所述终端设备从所述源信关站切换至所述目标信关站;或者,当所述第一信道质量小于第二阈值、且所述第二信道质量大于或等于所述第二阈值时,所述处理单元,用于将目标区域内的各终端设备从所述源信关站切换至所述目标信关站,所述目标区域为所述终端设备所在的小区或波束覆盖区,所述小区包含至少一个波束覆盖区,所述小区包含于所述卫星的覆盖范围内。
一种可行的设计中,当所述第一信道质量小于第二阈值、且所述第二信道质量小于所述第二阈值时,所述处理单元,用于对所述终端设备执行卫星切换;或者,当所述第一信道质量小于第二阈值、且所述第二信道质量小于所述第二阈值时,所述处理单元,用于对目标区域内的各终端设备执行卫星切换,所述目标区域为所述终端设备所在的小区或波束覆盖区,所述小区包含至少一个波束覆盖区,所述小区包含于所述卫星的覆盖范围内。
一种可行的设计中,所述发送单元,在所述接收单元接收来自所述目标信关站的所述第二信道质量之前,还用于经由所述卫星向所述终端设备发送第二指示信息,所述第二指示信息用于指示传输上行参考信号的传输资源,所述上行参考信号用于检测所述第一信道质量。
一种可行的设计中,所述第三指示信息还用于指示上行参考信号所在的传输资源,所述上行参考信号用于检测所述第一信道质量。
一种可行的设计中,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源;或者,同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。
一种可行的设计中,所述发送单元,还用于向向所述卫星发送第四指示信息,所述第四指示信息用于指示所述卫星将所述上行参考信号发送给所述源信关站和所述目标信关站。
第六方面,本申请实施例提供一种通信装置,包括:
接收单元,用于接收源信关站发送的第三指示信息,所述第三指示信息用于指示 所述目标信关站向所述源信关站反馈第二信道质量,所述第二信道质量用于表征终端设备经由卫星至所述目标信关站的链路的质量;
处理单元,用于确定所述第二信道质量;
发送单元,用于向所述源信关站发送所第二信道质量。
一种可行的设计中,所述接收单元,还用于接收来自所述终端设备且经由所述卫星转发的上行参考信号;
所述处理单元,用于根据所述上行参考信号,确定所述第二信道质量。
一种可行的设计中,所述第三指示信息还用于指示上行参考信号所在的传输资源,所述上行参考信号用于检测所述第一信道质量。
一种可行的设计中,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源;或者,同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。
第七方面,本申请实施例提供一种通信装置,包括处理器、存储器及存储在所述存储器上并可在处理器上运行的计算机程序,所述处理器执行所述程序时使得通信装置实现如上第一方面或第一个方面的各种可能的实现方式中的方法。
第八方面,本申请实施例提供一种通信装置,包括处理器、存储器及存储在所述存储器上并可在处理器上运行的计算机程序,所述处理器执行所述程序时使得通信装置实现如上第二方面或第二个方面的各种可能的实现方式中的方法。
第九方面,本申请实施例提供一种通信装置,包括处理器、存储器及存储在所述存储器上并可在处理器上运行的计算机程序,所述处理器执行所述程序时使得通信装置实现如上第三方面或第三个方面的各种可能的实现方式中的方法。
第十方面,本申请实施例提供一种通信装置,包括:逻辑电路和输入接口,其中,所述输入接口用于获取待处理的数据,所述逻辑电路用于对待处理的数据执行如第一方面任一项所述的方法,得到处理后的数据。
一种可行的设计中,该通信装置还包括:输出接口,该输出接口用于输出所述处理后的数据。
第十一方面,本申请实施例提供一种通信装置,包括:逻辑电路和输入接口,其中,所述输入接口用于获取待处理的数据,所述逻辑电路用于对待处理的数据执行如第二方面任一项所述的方法,得到处理后的数据。
一种可行的设计中,该通信装置还包括:输出接口,该输出接口用于输出所述处理后的数据。
第十二方面,本申请实施例提供一种通信装置,包括:逻辑电路和输入接口,其中,所述输入接口用于获取待处理的数据,所述逻辑电路用于对待处理的数据执行如第三方面任一项所述的方法,得到处理后的数据。
一种可行的设计中,该通信装置还包括:输出接口,该输出接口用于输出所述处理后的数据。
第十三方面,本申请实施例提供一种计算机可读存储介质,所述计算机可读存储介质用于存储程序,所述程序在被处理器执行时用于执行第一方面任一项所述的方法。
第十四方面,本申请实施例提供一种计算机可读存储介质,所述计算机可读存储 介质用于存储程序,所述程序在被处理器执行时用于执行第二方面任一项所述的方法。
第十五方面,本申请实施例提供一种计算机可读存储介质,所述计算机可读存储介质用于存储程序,所述程序在被处理器执行时用于执行第三方面任一项所述的方法。
第十六方面,本申请实施例提供一种计算机程序产品,当所述计算机程序产品在通信装置上运行时,使得所述通信装置执行第一方面任一项所述的方法。
第十七方面,本申请实施例提供一种计算机程序产品,当所述计算机程序产品在通信装置上运行时,使得所述通信装置执行第二方面任一项所述的方法。
第十八方面,本申请实施例提供一种计算机程序产品,当所述计算机程序产品在通信装置上运行时,使得所述通信装置执行第三方面任一项所述的方法。
本申请实施例提供的信关站切换方法,当终端设备经由卫星至源信关站之间的链路质量差时,源信关站向目标信关站发送第三指示信息,使得目标信关站向源信关站反馈第二信道质量,即终端设备经由所述卫星至所述目标信关站的链路的质量。源信关站利用该第二信道质量和用于表征终端设备经由卫星至源信关站之间的链路质量的第一信道质量,确定是否将所述终端设备切换至所述目标信关站。该过程中,源信关站通过对比源信关站经由卫星到终端设备的链路、目标信关站经由卫星至终端设备的链路的质量,确定出是否该切换信关站,提高通信质量。
附图说明
图1A是馈电链路质量差的示意图;
图1B是服务链路质量差的示意图;
图1C是服务链路和馈电链路质量均差的示意图;
图2是本申请实施例提供的信关站切换方法所适用的网络架构示意图;
图3是本申请实施例提供的信关站切换方法的流程图;
图4是本申请实施例提供的另一种信关站切换方法的流程图;
图5为本申请实施例提供的一种通信装置的结构示意图;
图6为本申请实施例提供的另一种通信装置的结构示意图;
图7为本申请实施例提供的又一种通信装置的结构示意图;
图8为本申请实施例提供的又一种通信装置的结构示意图。
具体实施方式
常见的陆地网络中,终端设备和网络设备之间的链路上不存在卫星等中继,网络设备利用终端设备发送的上行参考信号检测链路质量。上行参考信号的发送方式有三种:
第一种:周期性发送上行参考信号。该种方式中,网络设备给终端设备配置用于周期性发送上行参考信号的资源,终端设备周期性的发送上行参考信号。
第二种:半静态发送上行参考信号。该种方式中,网络设备给终端设备配置半静态的资源,终端设备接收到该资源后,不会立即发送上行参考信号,而是等到网络设备发送的激活指令后才会周期性的发送上行参考信号。
第三种:非周期性发送上行参考信号。该种方式中,网络设备给终端设备配置非 周期性的资源,终端设备接收到网络设备发送的指令后,才在该非周期性的资源上发送上行参考信号。
NTN通信包括卫星通信、高空平台通信等。由于该类型的网络设备在离地面几百公里至几万公里高度,因此,NTN具有覆盖范围大、组网灵活等特点。NTN在向着T比特量级的目标发展。终端设备经由卫星至信关站(gateway)的链路,包括终端设备与卫星之间的服务链路(service link),以及卫星与信关站之间的馈电链路(feeder link),卫星的主要功能是透传。
根据上述可知:若继续沿用陆地网络中的链路检测方法,信关站利用来自终端设备且经由卫星转发的上行参考信号检测链路质量,当信关站确定出链路质量差时,则无法进一步的判断出是馈电链路还是服务链路出现严重的传播损耗。示例性的,可参见图1A-图1C。
图1A是馈电链路质量差的示意图。请参照图1A,终端设备位于卫星的某个波束覆盖区内,该终端设备与卫星之间建立服务链路,卫星与信关站之间建立馈电链路,受天气的影响,馈电链路质量差。
图1B是服务链路质量差的示意图。请参照图1B,终端设备位于卫星的某个波束覆盖区内,该终端设备与卫星之间建立服务链路,卫星与信关站之间建立馈电链路,受天气的影响,服务链路质量差。
图1C是服务链路和馈电链路质量均差的示意图。请参照图1C,终端设备位于卫星的某个波束覆盖区内,该终端设备与卫星之间建立服务链路,卫星与信关站之间建立馈电链路,受天气的影响,服务链路和馈电链路的质量都差。
如图1A-图1C所示,服务链路、馈电链路均会受到天气等的影响,卫星的工作模式为透明转发(transparent),终端设备通过来自信关站且经由卫星转发的下行参考信号,检测到的信道质量包括了馈电链路和服务链路信道质量,无法分离出这个两个信道质量。同理,信关站通过上行参考信号检测到的信道质量同样包含了馈电链路和服务链路信道质量,信关站无法分离出这两部分的信道质量。
而且,若终端设备利用上述的第一种或第二种方式发送上行参考信号,则会浪费终端设备的功率;若终端设备利用上述的第三种方式发送上行参考信号,即终端设备不定期的多次发送上行参考信号时,非周期性的发送上行参考信号会造成较大的信令交互,影响上行和下行数据传输效率。
通常情况下,当某个卫星与信关站间的馈电链路受到天气等的严重影响时,需要进行信关站切换以防止终端设备与网络设备间的通信中断;而当某个卫星与终端设备间的服务链路质量差时,需要进行卫星切换。显然,若信关站无法判断出是馈电链路还是服务链路质量差,则无法确定出是否要进行信关站的切换。
有鉴于此,本申请实施例提供一种信关站切换方法及通信装置,通过对比源信关站经由卫星到终端设备的链路、目标信关站经由卫星至终端设备的链路的质量,确定出是否该切换信关站,提高通信质量。
本申请实施例提供的信关站切换方法主要涉及源信关站、目标信关站、终端设备三个执行主体,可应用于NTN通信系统,该NTN通信系统基于第四代(4th generation,4G)移动通信系统(例如,长期演进(long term evolution,LTE)、先进的长期演进 系统(advanced long term evolution,LTE-A))、第三代合作伙伴计划(3rd generation partnership project,3GPP)相关的蜂窝系统、第五代(5th generation,5G)移动通信系统以及后续演进的通信系统建立。其中,5G还可以被称为新无线(new radio,NR)。
本申请实施例中,信关站也可以称之为关口站、gateway等,其可以和网络设备,如5G中的gNB、LTE中的eNB分开设置,也可以与gNB、eNB等集成设置。以下若未做特殊说明,信关站,包括源信关站和目标信关站均是集成了网络设备功能的信关站。源信关站指当前为卫星的波束覆盖区内的终端设备提供通信服务的信关站,目标信关站为执行信关站切换后为终端设备提供服务的信关站,也就是说,目标信关站为具备向终端设备提供通信服务能力、但当前还未向终端设备提供服务的信关站。可以理解的是,若源信关站、目标信关站均与网络设备分开设置,则本申请实施例中,源信关站将第一信道质量、目标信关站将第二信道质量发送给网络设备,由网络设备决定是否执行信关站切换。
卫星为工作在透明转发模式的卫星,其可根据地球站(图中未示出)的控制,确定将来自终端设备的上行参考信号发送给一个或多个信关站。另外,也可以预先配置卫星向多个信关站转发来自终端设备的上行参考信号等,或者,也可以是源信关站触发卫星向多个信关站转发来自终端设备的上行参考信号等,本申请实施例并不限制。信关站可以具有地球站的功能,即地球站与信关站可以合为一个,此时,信关站既具有无线通信管理功能也具有控制卫星的功能。
终端设备包括但不限于经由有线线路连接,如经由公共交换电话网络(Public Switched Telephone Networks,PSTN)、数字用户线路(Digital Subscriber Line,DSL)、数字电缆、直接电缆连接;和/或另一数据连接/网络;和/或经由无线接口,如,针对蜂窝网络、无线局域网(Wireless Local Area Network,WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器;和/或另一终端设备的被设置成接收/发送通信信号的装置;和/或物联网(Internet of Things,IoT)设备。被设置成通过无线接口通信的终端设备可以被称为“无线通信终端”、“无线终端”或“移动终端”。该终端设备的示例包括但不限于卫星电话或蜂窝电话;可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(Personal Communications System,PCS)终端;可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(Global Positioning System,GPS)接收器的PDA;以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。可以指接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。还可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字处理(Personal Digital Assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、5G网络中的UE或者未来演进的终端等。
图2是本申请实施例提供的信关站切换方法所适用的网络架构示意图。请参照图2,该网络架构包括:终端设备、卫星1、卫星2、源信关站、目标信关站以及核心网等。终端设备与卫星1之间建立服务链路,卫星1与源信关站之间建立馈电链路,卫 星的波束覆盖区包括波束覆盖区1~波束覆盖区4以及其他波束覆盖区(图中未示出),源信关站为终端设备所在的波束覆盖区1提供通信服务,另外,源信关站也可以为波束覆盖区2~波束覆盖区4内的终端设备提供通信服务,目标信关站为一个备份的gateway,它与卫星1之间可以建立馈电链路,若针对终端设备执行信关站切换,则为终端设备提供通信服务。卫星2与卫星1的距离较远,若针对终端设备执行卫星切换,则卫星2可以为终端设备提供服务。图中每一个椭圆表示一个波束覆盖区。服务链路和馈电电路会由于天气、被遮挡等原因,信道质量会发生严重衰减。
图2中,目标信关站至少为一个,以下若未做特殊说明,下述的目标信关站为图2中的两个目标信关站中的任意一个。
基于图2,为清楚起见,术语定义如下:
第一信道质量:终端设备经由卫星1至源信关站的链路的质量;
第二信道质量:终端设备经由卫星1至目标信关站的链路的质量;
第一指示信息:终端设备通过卫星1向源信关站发送的、用于指示第一信道质量低于第一阈值的指示信息;
第二指示信息:源信关站通过卫星向终端设备发送的、用于指示上行参考信号的传输资源的指示信息;
第三指示信息:源信关站向目标信关站发送的、用于指示所述目标信关站向所述源信关站反馈第二信道质量的指示信息;
第四指示信息:源信关站向卫星1发送的、用于指示卫星1向多个信关站发送上行参考信号的指示信息,该第四指示信息也可以是源信关站发送给地球站,使得地球站触发卫星1向多个信关站发送上行参考信号。或者,也可以不需要第四指示信息,例如,根据天气情况,地球站在下午三点至六点触发卫星1向多个信关站发送上行参考信号;同时,源信关站也根据天气情况在下午三点至六点与目标信关站交互。另外,若不考虑节能和干扰,也可以是卫星一直向多个信关站转发其接收到的来自终端设备的信号。
下面,基于图2所示网络架构,对本申请实施例所述的信关站切换方法进行详细说明。示例性的,可参见图3,图3是本申请实施例提供的信关站切换方法的流程图,本实施例是从源信关站和目标信关站切换的角度,对本申请实施例进行详细说明。本实施例包括:
101、源信关站向目标信关站发送第三指示信息。
相应的,目标信关站接收来自源信关站的第三指示信息,该第三指示信息用于指示所述目标信关站向所述源信关站反馈第二信道质量,所述第二信道质量用于表征终端设备经由卫星至所述目标信关站的链路的质量。
示例性的,当源信关站获知终端设备经由卫星1至源信关站之间的链路质量差时,向目标信关站发送第三指示信息。该第三指示信息可以携带在测量与反馈(measurement and report)等信令中发送给目标信关站。
例如,源信关站在对终端设备提供通信服务的过程中,发现来自终端设备且经由卫星转发的上行信号,如上行参考信号或上行数据信号的质量低于第一阈值,则认为终端设备经由卫星1至源信关站之间的链路质量差,并得到第一信道质量,该第一信 道质量用于表征终端设备经由卫星至源信关站之间的链路的质量。此时,源信关站主动向目标信关站发送第三指示信息。采用该种方案,实现源信关站主动触发信关站切换的目的。需要指出的是,上行参考信号或上行数据信号的质量等于第一阈值时,可以认为是终端设备经由卫星1至源信关站之间的链路质量差。也就是说,取值恰好等于阈值的时候,既可以将之合并入小于阈值的情形,也可以合并入大于阈值的情形,甚至特别针对等于阈值的情况进行设计,本申请不做限制,本申请实施例中涉及阈值的情形也都类似,不再赘述。
再如,终端设备检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值时,经过卫星向源信关站发送第一指示信息,从而触发源信关站向目标信关站发送第三指示信息。其中,该第一指示信息用于向源信关站指示第一信道质量低于第一阈值。该第一指示信息可以显式的向源信关站指示第一信道质量低于第一阈值,比如0表示第一信道质量低于第一阈值,1表示第一信道质量高于或等于第一阈值;或者,第一指示信息也可以隐式的向源信关站指示第一信道质量低于第一阈值,比如,预先约定一个特殊结构的上行参考信号,若源信关站接收到终端设备经由卫星发送的特殊结构的上行参考信号,则认为第一信道质量低于第一阈值。采用该种方案,实现终端设备主动触发信关站切换的目的。
可选的,该第三指示信息还可以向目标信关站指示承载上行参考信号的传输资源、终端设备发送上行参考信号时使用的扰码、调制与编码策略(modulation and coding scheme,MCS)、源信关站与卫星间馈电链路的往返时延或源信关站和目标信关站与卫星之间往返时延差等。
102、目标信关站向源信关站发送第二信道质量。
相应的,源信关站接收来自目标信关站的第二信道质量。
103、源信关站利用所述第二信道质量和第一信道质量,确定是否将所述终端设备切换至所述目标信关站。
其中,所述第一信道质量用于表征所述终端设备经由卫星至所述源信关站之间的链路的质量。该第一信道质量可以是源信关站自己利用下行信号。
示例性的,第一信道质量可以是源信关站在为终端设备服务的过程中,利用终端设备通过卫星转发的上行信号得到,或者,也可以是终端设备利用来自源信关站且经由卫星转发的下行信号得到,并通过第一指示信息告知给源信关站;或者,也可以源信关站接收到来自终端设备且经由卫星转发的第一指示信息后,再对终端设备经由卫星转发的上行参考信号进行测量得到。该第一信道质量包含了终端设备至卫星1的服务链路以及卫星1至源信关站的馈电链路的质量。而第二信道质量包含了终端设备至卫星1的服务链路以及卫星1至目标信关站的馈电链路的质量。由于服务链路相同,因此可以得出导致第一信道质量和第二信道质量不同的原因是:馈电链路不同。显然,若第二信道质量大于第一信道质量,则是由于卫星1与目标信关站之间的馈电链路的质量,优于卫星1与源信关站之间的馈电链路的质量。此时,切换信关站可以提高馈电链路的质量。
本申请实施例提供的信关站切换方法,当终端设备经由卫星至源信关站之间的链路质量差时,源信关站向目标信关站发送第三指示信息,使得目标信关站向源信关站 反馈第二信道质量,即终端设备经由所述卫星至所述目标信关站的链路的质量。源信关站利用该第二信道质量和用于表征终端设备经由卫星至源信关站之间的链路质量的第一信道质量,确定是否将所述终端设备切换至所述目标信关站。该过程中,源信关站通过对比源信关站经由卫星到终端设备的链路、目标信关站经由卫星至终端设备的链路的质量,确定出是否该切换信关站,提高通信质量。
上述实施例中,源信关站利用第二信道质量和第一信道质量,确定是否将终端设备切换至目标信关站时,将第一信道质量和第二信道质量和第二阈值进行比较。例如,第一阈值可以为12dB,而第二阈值可以为10dB,第二阈值是源信关站用来判别执行信关站切换还是卫星切换的阈值。此处,本申请实施例对第一阈值和第二阈值之间的大小关系以及数值不做限定。判别过程中,由于终端设备经由卫星至源信关站的链路,与终端设备经由卫星至目标信关站的链路中的服务链路相同,而馈电链路不同,当第一信道质量小于第二阈值、且第二信道质量大于或等于第二阈值时,说明相较于卫星与源信关站之间的馈电电路,卫星与目标信关站之间的馈电链路的质量更好。因此,源信关站将终端设备从源信关站切换至目标信关站。该切换可以是终端设备级别、小区级别或波束覆盖区级别的。其中,终端设备级别是指仅将一个终端设备从源信关站切换至目标信关站。卫星的整个覆盖范围可以划分为多个小区,每个小区又可以包含多个波束覆盖区,因此,小区级别的切换是指将终端设备所在小区的所有终端设备都切换至目标信关站,波束覆盖区级别的切换是指将终端设备所在波束覆盖区内的所有终端设备都切换至目标信关站,需要切换的小区或波束覆盖区称之为目标区域。采用该种方案,实现终端设备级别、小区级别或波束覆盖区级别的信关站切换的目的。
当第一信道质量小于第二阈值、且第二信道质量小于第二阈值时,说明两个馈电链路的质量都很差,此时若切换信关站,则无法改善整体链路(终端设备-卫星-信关站)质量。因此,需要对终端设备执行卫星切换。该切换可以是终端设备级别、小区级别或波束覆盖区级别的。其中,终端设备级别是指仅将一个终端设备从卫星1切换至卫星2。小区级别的切换是指将终端设备所在小区的所有终端设备都从卫星1切换至为2,波束覆盖区级别的切换是指将终端设备所在波束覆盖区内的所有终端设备都从卫星1切换至卫星2,需要切换的小区或波束覆盖区称之为目标区域。采用该种方案,实现终端设备级别、小区级别或波束覆盖区级别的卫星切换的目的。
可以理解的是,不同的波束覆盖区可以根据部分带宽(bandwidth part,BWP)、传输配置指示(transmission configuration indicator,TCI)或同步信号块(synchronization signal block,SSB)进行区分。也就是说,当卫星切换或信关站切换是波束覆盖区级别的切换时,可以根据BWP、TCI或SSB指示波束覆盖区。例如,终端设备和源信关站之间可以通过BWP、TCI或SSB的切换,来指示波束覆盖区的切换,从而对于终端设备或源信关站而言,实际进行的可能是BWP、TCT或SSB的切换。另外,本申请实施例中的波束也可以替换为BWP、TCI或SSB等。
上述实施例中,从节能和避免干扰的角度而言,卫星不会一直向所有的信关站转发所有小区/波束覆盖区的信号。一般情况下只会转发信关站服务的波束覆盖区/小区的信号,也就是说,对于源信关站而言,卫星只会转发由源信关站提供通信服务的波束覆盖区/小区内的终端设备的信号,而不会同时将该信号转发至目标信关站;同理,卫 星不会把目标信关站服务的波束覆盖区/小区内的终端设备的信号,转发给源信关站。因此,源信关站指示目标信关站反馈第二信道质量时,需要卫星向目标信关站转发来自终端设备的上行参考信号或上行信号,以使得目标信关站利用上行参考信号或上行信号得到第二信道质量并反馈给源信关站。下面,对目标信关站如何检测到第二信道质量进行详细说明。
示例性的,当源信关站与目标信关站交互时,地球站协同工作,向卫星1发送指令,使得卫星1将来自终端设备的上行参考信号发送给目标信关站和源信关站。或者,使得卫星1将来自终端设备设备所在小区或波束覆盖区内的其他终端设备的上行参考信号发送给目标信关站和源信关站。该种情况下,考虑到地球站向卫星发送指令产生的延时,源信关站为终端设备配置的用于发送上行参考信号的传输资源时,需要考虑地球站向卫星发指令产生的时延,从而给卫星预留最够的时间去接收相关指令。
地球站控制卫星向多个信关站发送上行参考信号,可以简单的从端口角度理解。例如,卫星从端口1接收到来自终端设备的上行参考信号,从端口10转发给源信关站,从端口11转发给目标信关站。
上述实施例中,可以通过源信关站触发卫星向地球站发送指令,使得卫星将上行参考信号发送给多个信关站。另外,也可以是源信关站直接向卫星发送第四指示信息,以指示卫星向多个信关站发送上行参考信号。或者,也可以根据天气等在地球站上进行预配置,使得地球站根据预配置向卫星发送指令。例如,根据天气预报可知:某年某月某日下午3点-6点将有暴雨天气,因此,在地球站上预配置某年某月某日下午3点-6点向卫星发送指令,同时,预配置源信关站也在某年某月某日下午3点-6点与目标信关站交互。
上述实施例中,源信关站可以预先配置传输资源,即源信关站经由卫星向终端设备发送第二指示信息,该第二指示信息用于指示传输上行参考信号的传输资源,所述上行参考信号用于检测所述第一信道质量,该第二指示信息可以配置在部分带宽(Bandwidth Part,BWP)中,例如,在BWP上行专用信令(BWP-uplinkdedicated)中增加一个新的信令,即DGWS-config,利用该新的信令配置传输资源。另外,还可以通过RRC信令等配置传输资源。源信关站与目标信关站交互时,通过第一指示信息向目标信关站指示传输资源。之后,终端设备在传输资源上发送上行参考信号时,目标信关站和源信关站就可以在该传输资源上接收上行参考信号。
源信关站预先配置传输资源时,可以以终端设备级别、波束覆盖区或小区的级别配置用于传输上行参考信号的传输资源。当以终端设备级别配置传输资源时,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源。也就是说,不同终端设备的传输资源的时域资源和/或频域资源不同,但码字可以相同或不同。如此一来,源信关站和目标信关站不会在相同的传输资源上接收到不同终端设备发送的上行参考信号。采用该种方案,实现源信关站以终端设备为单位配置传输资源的目的。
当源信关站以波束覆盖区或小区级别配置传输资源时,同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。也就是说,同一个波束覆盖区或小区内的终端设备的传输资源的时域资源相同且频域资源也相同, 但是每个终端设备的码字不同,源信关站可以为每个终端设备配置不同的码字,也可以配置一个码字候选池,终端设备在该候选池内随机选择码字。如此一来,可以避免分集增益。另外,不同终端设备的传输资源不同,也可以是极化方式、多天线传输方式、时域、频域、码字、波束等不同。
上述步骤101中,当源信关站主动触发信关站切换时,源信关站向目标信关站发送第三指示信息的同时,触发终端设备向卫星发送上行参考信号,该上行参考信号被卫星转发给源信关站和目标信关站,源信关站利用该上行参考信号确定第一信道质量,目标信关站利用该上行参考信号确定第二信道质量。另外,由于源信关站主动触发信关站切换时,源信关站在终端设备发送上行参考信号之前,就能够利用上行信号,如上行数据信号或上行参考信号确定出第一信道质量。因此,卫星接收到终端设备发送的上行参考信号后,也可以将该上行参考信号仅发送给目标信关站,而不发送给源信关站。若同时发送给源信关站和目标信关站,则源信关站利用该上行参考信号再次确定第一信道质量,后续利用该新的第一信道质量与第二信道质量确定是否切换信关站,或者,源信关站利用两次测量得到的第一信道质量的平均值和第二信道质量确定是否切换信关站等,本申请实施例并不限制。
当由终端设备触发信关站切换时,卫星向源信关站和目标信关站转发上行参考信号可以分为两种情况:
第一种情况,终端设备显式的向源信关站指示第一信道质量低于第一阈值,例如,第一指示信息是1比特的信息,为0表示第一信道质量低于第一阈值,为1表示第一信道质量高于第一阈值,只有在第一指示信息为0时,终端设备才通过卫星向源信关站发送该第一指示信息。这种情况下,终端设备发送第一指示信息后,在源信关站的触发下发送上行参考信号;或者,终端设备等待一定的时长,在预配置的传输资源上主动向卫星发送上行参考信号,其中,传输资源为源信关站为终端设备配置的用于发送上行参考信号的资源。
第二种情况:终端设备隐式的向源信关站指示第一信道质量低于第一阈值,例如,终端设备和源信关站预先约定一种特殊格式的上行参考信号,当终端设备检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值时,在传输资源上向卫星发送特殊格式的上行参考信号。卫星将该特殊格式的上行参考信号转发给源信关站和目标信关站,源信关站利用该上行参考信号确定第一信道质量,目标信关站利用该上行参考信号确定第二信道质量。此时,无需终端设备发送第一指示信息后再发送上行参考信号,减少终端设备发送信号的次数。可理解的,也可以使用常用的上行参考信号替换所述特殊格式的上行参考信号,例如,可以使用上行探测参考信号(sounding reference signal,SRS)或者专用调制参考信号(demodulation reference signal,DMRS)等。
当终端设备经由卫星至源信关站之间的链路质量差是暴雨等糟糕天气造成时,上述终端设备触发信关站切换的功能无需一直开启,而是仅仅在天气糟糕的时间段开启即可。也就是说,当天气异常时,源信关站向终端设备发送激活指令,该激活指令用于激活终端设备触发信关站切换的功能,之后,终端设备检测下行信号的质量,当下行信号的质量低于第一阈值时,通过卫星向源信关站发送第一指示信息。此时,还可 以衍生出第三种情况:源信关站通过卫星向终端设备发送激活指令后,无论终端设备是否发送第一指示信息,卫星都在传输资源上向源信关站和目标信关站转发来自终端设备的上行信号,如上行参考信号或上行数据信号,使得源信关站利用该上行信号确定第一信道质量,目标信关站利用该上行信号确定第二信道质量。当然,也可以限定只有在终端设备发送第一指示信息的前提下,卫星才转发终端设备发送的上行参考信号。其中,传输资源为源信关站为终端设备配置的用于发送上行参考信号的资源。
上述第三种情况中,由于源信关站通过卫星向终端设备发送激活指令后,即使终端设备还未发送第一指示信息,卫星都会在传输资源上向源信关站和目标信关站转发来自终端设备的上行信号。为了节省资源的开销,终端设备未发送第一指示信息时,该传输资源可以用来发送上行数据信号。若源信关站和目标信关站在传输资源上检测到的上行数据信号,则无需进行信道质量的测量;若源信关站和目标信关站在传输资源上检测到上行参考信号,则执行信道质量的测量。采用该种方案,避免终端设备检测到下行信号的质量差后,还需要上报第一指示信息才触发待源信关站和目标信关站交互,减少信令交互。
下面,以上述的第二种情况为例,对终端设备如何触发源信关站与目标信关站交互进行详细说明。示例性的,可参见图4,图4是本申请实施例提供的另一种信关站切换方法的流程图,包括:
201、源信关站通过卫星向终端设备发送第一阈值、激活指令、目标次数N、间隔时长T中的至少一个。
其中,所述激活指令用于指示所述终端设备在下行信号的质量低于所述第一阈值时发送所述上行参考信号,所述目标次数N用于指示所述终端设备发送所述上行参考信号的次数,所述间隔时长T用于指示所述终端设备发送N次上行参考信号后至再次检测下行信号质量之间的时长,所述N≥1且为整数。
示例性的,源信关站根据天气预报或实际天气情况,以广播、组播或单播方式通过卫星向终端设备发送激活指令,该激活指令用于指示终端设备激活信关站切换功能,即一旦终端设备检测出下行信号的质量低于所述第一阈值时发送所述上行参考信号。该激活指令可以用1比特来表示,如动态信关站切换触发(Dynamic gateway switch,DGS)指示(trigger),当DGS trigger=0表示未激活,DGS trigger=1表示激活。
源信关站向终端设备发送激活指令的同时,可以将目标次数N、第一阈值(threshold1)、目标次数N或间隔时长等一起发送给终端设备。例如,源信关站将第一阈值、激活指令、目标次数N、间隔时长T中的至少一个携带在广播信息中,通过卫星发送给终端设备,广播信息可以是系统信息块(system information block,SIB)、其他系统消息(other system information,OSI)、主系统信息块(mater information block,MIB)等。再如,若终端设备处于无线资源控制(radio resource control,RRC)连接态,则源信关站还以可以将第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,携带在连接态信息中发送给终端设备,该连接态信息包括RRC信息、下行控制信息(downlink control information,DCI)、组DCI、介质访问控制(media access control,MAC)元素(element))、定时提前命令(timing advance command,TAC)中的至少一个种。又如,源信关站将第一阈值、激活指令、目标次数N、间隔时长T中的至 少一个,通过物理下行共享数据信道(Physical Down link Shared Channel,PDSCH)发送给终端设备。后续通信过程中,源信关站可以发送新的第一阈值等,来更新第一阈值,以改变终端设备发送上行参考信号的触发频率,可以防止误触发和节省终端设备的能量。
202、源信关站经由卫星向终端设备发送第二指示信息。
相应的,终端设备接收来自源信关站且经由卫星转发的第二指示信息,该第二指示信息用于指示传输上行参考信号的传输资源,所述上行参考信号用于检测所述第一信道质量。
需要说明的是,上述步骤201和202并无严格的先后顺序。
203、终端设备判断是否开启触发信关站切换功能,若终端设备开启触发信关站切换功能,则执行步骤204;若终端设备未开启触发信关站切换功能,则执行步骤212。
示例性的,终端设备判断是否接收到DGS trigger=1的激活指令,若接收到该激活指令,则说明终端设备开启了触发信关站切换的功能;若未接收到到DGS trigger=1的激活指令,则说明终端设备不用检测下行信号的质量。
204、终端设备判断下行信号的质量低于是否第一阈值,若下行信号的质量低于第一阈值,则执行步骤205;若下行信号的质量等于或高于第一阈值,则执行步骤203。
示例性的,下行信号质量可以是基于下行参考信号或下行数据信号得到的的信号与噪声功率比(signal to noise ratio,SNR)、比特能量与噪声功率谱密度比(Eb/N0)、参考信号接收功率(reference signal received power,RSRP)、信道质量指示(channel quality indicator,CQI)、信号与干扰噪声功率比(signal to interference plus noise power ratio,SINR)、参考信号接收质量(reference signal received quality,RSRQ)或解码性能(例如丢包率等)。其中,下行参考信号可以是解调参考信号(demodulation reference signal,DMRS)、相位追踪参考信号(phase tracking reference signal,PTRS)、信道状态信息参考信号(Channel State Information-Reference Signal,CSI-RS)等。
205、终端设备向卫星发送上行参考信号。
该上行参考信号可以是上行探测参考信号(sounding reference signal,SRS)、解调参考信号(demodulation reference signal,DMRS)、相位追踪参考信号(phase tracking reference signal,PTRS)等。
可选的,若源信关站预先配置了发送次数N,则终端设备向卫星发送N次上行参考信号。之后,激活指令重置为0,即DGS trigger=0。或者,若源信关站预先配置了间隔时长T,则终端设备检查出下行信号的质量低于第一阈值,并发送N次上行参考信号后,间隔一段时间T(T大于0)后,再次检测下行信号的质量,根据再次检测得到的结果判断是否发送上行参考信号。采用该种方案,可以避免终端设备一直发送上行参考信号导致的耗电量增加。
206、卫星向源信关站转发上行参考信号。
207、卫星向目标信关站转发上行参考信号。
需要说明的是,上述步骤206和步骤207并无严格的先后顺序。
208、源信关站利用上行参考信号确定出第一信道质量。
209、目标信关站利用上行参考信号确定出第二信道质量。
210、目标信关站向源信关站发送第二信道质量。
211、源信关站利用第一信道质量和第二信道质量,确定是否将终端设备切换至目标信关站。
示例性的,若第一信道质量大于或等于第二阈值,则表示终端设备经由卫星至源信关站的链路没有问题,不执行信关站切换或卫星切换。若第一信道质量小于第二阈值,则表示终端设备经由卫星至源信关站的链路有质量问题,需要执行卫星切换或信关站切换。进一步的,若第二信道质量大于或等于第二阈值,则将终端设备从源信关站切换至目标信关站,或者,将终端设备所在小区或波束覆盖区内的各终端设备从源信关站切换至目标信关站;若第二信道质量小于第二阈值,则对终端设备执行卫星切换,或者,对终端设备所在小区或波束覆盖区内的终端设备执行卫星切换。
212、终端设备不检测下行信号的质量。
图5为本申请实施例提供的一种通信装置的结构示意图。本实施例所涉及的通信装置可以为终端设备,也可以为应用于终端设备的芯片。该通信装置可以用于执行上述实施例中终端设备的功能。如图5所示,该通信装置100可以包括:
处理单元11,用于检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值;
收发单元12,用于向所述源信关站发送第一指示信息,所述第一指示信息用于指示第一信道质量低于所述第一阈值,所述第一信道质量用于表征所述终端设备经由卫星至所述源信关站之间的链路的质量。
一种可行的设计中,所述收发单元12,在向所述源信关站发送第一指示信息之后,还用于向所述卫星发送上行参考信号,所述上行参考信号用于供所述源信关站检测所述第一信道质量,以及目标信关站检测第二信道质量,所述第二信道质量用于表征所述终端设备经由卫星至所述目标信关站之间的链路的质量。
一种可行的设计中,所述第一指示信息为上行参考信号,所述上行参考信号用于供所述源信关站检测所述第一信道质量,以及所目标信关站检测第二信道质量,所述第二信道质量用于表征所述终端设备经由所述卫星至所述目标信关站之间的链路的质量。
一种可行的设计中,所述收发单元12,在所述处理单元11检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值之前,还用于接收来自所述源信关站且经由所述卫星转发的所述第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,其中,所述激活指令用于指示所述终端设备在下行信号的质量低于所述第一阈值时发送所述上行参考信号,所述目标次数N用于指示所述终端设备发送所述上行参考信号的次数,所述间隔时长T用于指示所述终端设备发送N次上行参考信号后至再次检测下行信号质量之间的时长,所述N≥1且为整数。
一种可行的设计中,所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个,携带在广播信息中;
或者,
所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个,携带在连接态信息中,所述连接态信息包括RRC信息、下行控制信息DCI、组DCI、 介质访问控制MAC元素、定时提前命令TAC中的至少一个种;
或者,
所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个通过物理下行共享数据信道发送。
一种可行的设计中,所述收发单元12,还用于接收所述源信关站经由所述卫星发送的第二指示信息,所述第二指示信息用于指示所述上行参考信号的传输资源。
一种可行的设计中,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源;
或者,
同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。
本申请实施例提供的通信装置,可以执行上述实施例中终端设备的动作,其实现原理和技术效果类似,在此不再赘述。
图6为本申请实施例提供的另一种通信装置的结构示意图。本实施例所涉及的通信装置可以为源信关站,也可以为应用于源信关站的芯片。该通信装置可以用于执行上述实施例中源信关站的功能。如图6所示,该通信装置200可以包括:
发送单元21,用于向目标信关站发送第三指示信息,所述第三指示信息用于指示所述目标信关站向所述源信关站反馈第二信道质量,所述第二信道质量用于表征终端设备经由卫星至所述目标信关站的链路的质量;
接收单元22,用于接收来自所述目标信关站的所述第二信道质量;
处理单元23,用于利用所述第二信道质量和第一信道质量,确定是否将所述终端设备切换至所述目标信关站,所述第一信道质量用于表征所述终端设备经由卫星至所述源信关站之间的链路的质量。
一种可行的设计中,所述处理单元23,在所述发送单元21向目标信关站发送第三指示信息之前,还用于确定出所述第一信道质量低于第一阈值。
一种可行的设计中,所述接收单元22,在所述发送单元21向目标信关站发送第三指示信息之前,还用于接收来自所述终端设备且经由所述卫星转发的第一指示信息,所述第一指示信息用于指示所述终端设备经由所述卫星至所述源信关站的链路的信道质量低于第一阈值。
一种可行的设计中,当所述第一指示信息为预设结构的上行参考信号时,所述上行参考信号还用于供所述源信关站检测所述第一信道质量,以及所目标信关站检测所述第二信道质量。
一种可行的设计中,所述发送单元21,在所述接收单元22接收来自所述终端设备且经由所述卫星转发的第一指示信息之前,还用于通过所述卫星向所述终端设备发送所述第一阈值、激活指令、目标次数N、间隔时长T中的至少一个,其中,所述激活指令用于指示所述终端设备在下行信号的质量低于所述第一阈值时发送所述上行参考信号,所述目标次数N用于指示所述终端设备发送所述上行参考信号的次数,所述间隔时长T用于指示所述终端设备发送N次上行参考信号后至再次检测下行信号质量之间的时长,所述N≥1且为整数。
一种可行的设计中,所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个,携带在广播信息中;
或者,
所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个,携带在连接态信息中,所述连接态信息包括RRC信息、下行控制信息DCI、组DCI、介质访问控制MAC元素、定时提前命令TAC中的至少一个种;
或者,
所述第一阈值、所述激活指令、所述目标次数N、所述间隔时长T中的至少一个通过物理下行共享数据信道发送。
一种可行的设计中,当所述第一信道质量小于第二阈值、且所述第二信道质量大于或等于所述第二阈值时,所述处理单元23,用于将所述终端设备从所述源信关站切换至所述目标信关站;或者,当所述第一信道质量小于第二阈值、且所述第二信道质量大于或等于所述第二阈值时,所述处理单元23,用于将目标区域内的各终端设备从所述源信关站切换至所述目标信关站,所述目标区域为所述终端设备所在的小区或波束覆盖区,所述小区包含至少一个波束覆盖区,所述小区包含于所述卫星的覆盖范围内。
一种可行的设计中,当所述第一信道质量小于第二阈值、且所述第二信道质量小于所述第二阈值时,所述处理单元23,用于对所述终端设备执行卫星切换;或者,当所述第一信道质量小于第二阈值、且所述第二信道质量小于所述第二阈值时,所述处理单元23,用于对目标区域内的各终端设备执行卫星切换,所述目标区域为所述终端设备所在的小区或波束覆盖区,所述小区包含至少一个波束覆盖区,所述小区包含于所述卫星的覆盖范围内。
一种可行的设计中,所述发送单元21,在所述接收单元22接收来自所述目标信关站的所述第二信道质量之前,还用于经由所述卫星向所述终端设备发送第二指示信息,所述第二指示信息用于指示传输上行参考信号的传输资源,所述上行参考信号用于检测所述第一信道质量。
一种可行的设计中,所述第三指示信息还用于指示上行参考信号所在的传输资源,所述上行参考信号用于检测所述第一信道质量。
一种可行的设计中,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源;或者,同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。
一种可行的设计中,所述发送单元21,还用于向向所述卫星发送第四指示信息,所述第四指示信息用于指示所述卫星将所述上行参考信号发送给所述源信关站和所述目标信关站。
本申请实施例提供的通信装置,可以执行上述实施例中源信关站的动作,其实现原理和技术效果类似,在此不再赘述。
图7为本申请实施例提供的又一种通信装置的结构示意图。本实施例所涉及的通信装置可以为目标信关站,也可以为应用于目标信关站的芯片。该通信装置可以用于执行上述实施例中目标信关站的功能。如图7所示,该通信装置300可以包括:
接收单元31,用于接收源信关站发送的第三指示信息,所述第三指示信息用于指示所述目标信关站向所述源信关站反馈第二信道质量,所述第二信道质量用于表征终端设备经由卫星至所述目标信关站的链路的质量;
处理单元32,用于确定所述第二信道质量;
发送单元33,用于向所述源信关站发送所第二信道质量。
一种可行的设计中,所述接收单元31,还用于接收来自所述终端设备且经由所述卫星转发的上行参考信号;
所述处理单元32,用于根据所述上行参考信号,确定所述第二信道质量。
一种可行的设计中,所述第三指示信息还用于指示上行参考信号所在的传输资源,所述上行参考信号用于检测所述第一信道质量。
一种可行的设计中,同一个波束覆盖区或小区内不同的终端设备的传输资源互为时频域资源不同、码字相同或不同的传输资源;或者,同一个波束覆盖区或小区内的不同终端设备的传输资源互为时频域资源相同、码字不同的传输资源。
本申请实施例提供的通信装置,可以执行上述实施例中目标信关站的动作,其实现原理和技术效果类似,在此不再赘述。
需要说明的是,应理解以上接收单元实际实现时可以为接收器、发送单元实际实现时可以为发送器,收发单元可以是收发器。而处理单元可以以软件通过处理元件调用的形式实现;也可以以硬件的形式实现。例如,处理单元可以为单独设立的处理元件,也可以集成在上述装置的某一个芯片中实现,此外,也可以以程序代码的形式存储于上述装置的存储器中,由上述装置的某一个处理元件调用并执行以上处理单元的功能。此外这些单元全部或部分可以集成在一起,也可以独立实现。这里所述的处理元件可以是一种集成电路,具有信号的处理能力。在实现过程中,上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如,以上这些单元可以是被配置成实施以上方法的一个或多个集成电路,例如:一个或多个专用集成电路(application specific integrated circuit,ASIC),或,一个或多个微处理器(digital signal processor,DSP),或,一个或者多个现场可编程门阵列(field programmable gate array,FPGA)等。再如,当以上某个单元通过处理元件调度程序代码的形式实现时,该处理元件可以是通用处理器,例如中央处理器(central processing unit,CPU)或其它可以调用程序代码的处理器。再如,这些单元可以集成在一起,以片上系统(system-on-a-chip,SOC)的形式实现。
图8为本申请实施例提供的又一种通信装置的结构示意图。如图8所示,该通信装置400包括:
处理器41和存储器42;
所述存储器42存储计算机执行指令;
所述处理器41执行所述存储器42存储的计算机执行指令,使得所述处理器41执行如上终端设备执行的信关站切换方法;或者,使得所述处理器41执行如上源信关站执行的信关站切换方法;或者,使得所述处理器41执行如上目标信关站执行的信关站切换方法。
处理器41的具体实现过程可参见上述方法实施例,其实现原理和技术效果类似, 本实施例此处不再赘述。
可选地,该通信装置400还包括通信接口43。其中,处理器41、存储器42以及通信接口43可以通过总线44连接。
在上述在通信装置的实现中,存储器和处理器之间直接或间接地电性连接,以实现数据的传输或交互,也就是存储器和处理器可以通过接口连接,也可以集成在一起。例如,这些元件相互之间可以通过一条或者多条通信总线或信号线实现电性连接,如可以通过总线连接。存储器中存储有实现数据访问控制方法的计算机执行指令,包括至少一个可以软件或固件的形式存储于存储器中的软件功能模块,处理器通过运行存储在存储器内的软件程序以及模块,从而执行各种功能应用以及数据处理。
存储器可以是,但不限于,随机存取存储器(Random Access Memory,简称:RAM),只读存储器(Read Only Memory,简称:ROM),可编程只读存储器(Programmable Read-Only Memory,简称:PROM),可擦除只读存储器(Erasable Programmable Read-Only Memory,简称:EPROM),电可擦除只读存储器(Electric Erasable Programmable Read-Only Memory,简称:EEPROM)等。其中,存储器用于存储程序,处理器在接收到执行指令后,执行程序。进一步地,上述存储器内的软件程序以及模块还可包括操作系统,其可包括各种用于管理系统任务(例如内存管理、存储设备控制、电源管理等)的软件组件和/或驱动,并可与各种硬件或软件组件相互通信,从而提供其他软件组件的运行环境。
处理器可以是一种集成电路芯片,具有信号的处理能力。上述的处理器可以是通用处理器,包括中央处理器(Central Processing Unit,简称:CPU)、网络处理器(Network Processor,简称:NP)等。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
在上述基础上,本申请还提供一种芯片,包括:逻辑电路、输入接口,其中:所述输入接口用于获取待处理的数据;所述逻辑电路用于对待处理的数据执行前述方法实施例中终端设备侧的技术方案,得到处理后的数据。
可选的,该芯片还可以包括:输出接口,所述输出接口用于输出处理后的数据。
当该逻辑电路执行终端设备侧的技术方案,该输入接口获取的待处理的数据包括下行信号、第二指示信息等,输出接口输出的处理后的数据包括第一指示信息、上行参考信号等。
本申请还提供一种芯片,包括:逻辑电路和输出接口,其中:所述逻辑电路用于对待处理的数据执行前述方法实施例中源信关站侧的技术方案,得到处理后的数据;以及,所述输出接口用于输出处理后的数据。
可选的,该芯片还包括:输入接口,该输入接口用于获取待处理的数据。
当该逻辑电路执行源信关站侧的技术方案,该输入接口获取的待处理的数据包括上行数据信号、上行参考信号等。输出接口输出的处理后的数据包括第二指示信息、第三指示信息等。
本申请还提供一种芯片,包括:逻辑电路和输出接口,其中:所述逻辑电路用于对待处理的数据执行前述方法实施例中目标信关站侧的技术方案,得到处理后的数据;以及,所述输出接口用于输出处理后的数据。
可选的,该芯片还包括:输入接口,该输入接口用于获取待处理的数据。
当该逻辑电路执行目标信关站侧的技术方案,该输入接口获取的待处理的数据包括上行参考信号等。输出接口输出的处理后的数据包括第二信道质量等。
本申请还提供一种计算机可读存储介质,所述计算机可读存储介质用于存储程序,所述程序在被处理器执行时用于执行前述实施例中终端设备侧的技术方案。
本申请还提供一种计算机可读存储介质,所述计算机可读存储介质用于存储程序,所述程序在被处理器执行时用于执行前述实施例中源信关站侧的技术方案。
本申请还提供一种计算机可读存储介质,所述计算机可读存储介质用于存储程序,所述程序在被处理器执行时用于执行前述实施例中目标信关站侧的技术方案。
本申请实施例还提供一种计算机程序产品,当所述计算机程序产品在通信装置上运行时,使得所述通信装置执行前述实施例中终端设备侧的技术方案;或者,使得所述通信装置执行前述实施例中源信关站的技术方案;或者,使得所述通信装置执行前述实施例中目标信关站的技术方案
本领域普通技术人员应理解:实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时,执行包括上述各方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质,具体的介质类型本申请不做限制。

Claims (34)

  1. 一种信关站切换方法,其特征在于,
    终端设备检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值;
    所述终端设备向所述源信关站发送第一指示信息,所述第一指示信息用于指示第一信道质量低于所述第一阈值,所述第一信道质量用于表征所述终端设备经由卫星至所述源信关站之间的链路的质量。
  2. 根据权利要求1所述的方法,其特征在于,所述终端设备向所述源信关站发送第一指示信息之后,还包括:
    所述终端设备向所述卫星发送上行参考信号,所述上行参考信号用于供所述源信关站检测所述第一信道质量,以及目标信关站检测第二信道质量,所述第二信道质量用于表征所述终端设备经由卫星至所述目标信关站之间的链路的质量。
  3. 根据权利要求1所述的方法,其特征在于,所述第一指示信息为上行参考信号,所述上行参考信号用于供所述源信关站检测所述第一信道质量,以及所目标信关站检测第二信道质量,所述第二信道质量用于表征所述终端设备经由所述卫星至所述目标信关站之间的链路的质量。
  4. 根据权利要求2或3所述的方法,其特征在于,还包括:
    所述终端设备接收所述源信关站经由所述卫星发送的第二指示信息,所述第二指示信息用于指示所述上行参考信号的传输资源。
  5. 一种信关站切换方法,其特征在于,包括:
    源信关站向目标信关站发送第三指示信息,所述第三指示信息用于指示所述目标信关站向所述源信关站反馈第二信道质量,所述第二信道质量用于表征终端设备经由卫星至所述目标信关站的链路的质量;
    所述源信关站接收来自所述目标信关站的所述第二信道质量;
    所述源信关站利用所述第二信道质量和第一信道质量,确定是否将所述终端设备切换至所述目标信关站,所述第一信道质量用于表征所述终端设备经由卫星至所述源信关站之间的链路的质量。
  6. 根据权利要求5所述的方法,其特征在于,所述源信关站向目标信关站发送第三指示信息之前,还包括:
    所述源信关站确定出所述第一信道质量低于第一阈值。
  7. 根据权利要求5所述的方法,其特征在于,所述源信关站向目标信关站发送第三指示信息之前,还包括:
    所述源信关站接收来自所述终端设备且经由所述卫星转发的第一指示信息,所述第一指示信息用于指示所述终端设备经由所述卫星至所述源信关站的链路的信道质量低于第一阈值。
  8. 根据权利要求7所述的方法,其特征在于,当所述第一指示信息为预设结构的上行参考信号时,所述上行参考信号还用于供所述源信关站检测所述第一信道质量,以及所目标信关站检测所述第二信道质量。
  9. 根据权利要求5~8任一项所述的方法,其特征在于,所述源信关站利用所述第二信道质量和第一信道质量,确定是否将所述终端设备切换至所述目标信关站,包括:
    当所述第一信道质量小于第二阈值、且所述第二信道质量大于或等于所述第二阈值时,所述源信关站将所述终端设备从所述源信关站切换至所述目标信关站;
    或者,
    当所述第一信道质量小于第二阈值、且所述第二信道质量大于或等于所述第二阈值时,所述源信关站将目标区域内的各终端设备从所述源信关站切换至所述目标信关站,所述目标区域为所述终端设备所在的小区或波束覆盖区,所述小区包含至少一个波束覆盖区,所述小区包含于所述卫星的覆盖范围内。
  10. 根据权利要求5~8任一项所述的方法,其特征在于,还包括:
    当所述第一信道质量小于第二阈值、且所述第二信道质量小于所述第二阈值时,所述源信关站对所述终端设备执行卫星切换;
    或者,
    当所述第一信道质量小于第二阈值、且所述第二信道质量小于所述第二阈值时,所述源信关站对目标区域内的各终端设备执行卫星切换,所述目标区域为所述终端设备所在的小区或波束覆盖区,所述小区包含至少一个波束覆盖区,所述小区包含于所述卫星的覆盖范围内。
  11. 根据权利要求5~10任一项所述的方法,其特征在于,所述源信关站接收来自所述目标信关站的所述第二信道质量之前,还包括:
    所述源信关站经由所述卫星向所述终端设备发送第二指示信息,所述第二指示信息用于指示传输上行参考信号的传输资源,所述上行参考信号用于检测所述第一信道质量。
  12. 根据权利要求5~11任一项所述的方法,其特征在于,所述第三指示信息还用于指示上行参考信号所在的传输资源,所述上行参考信号用于检测所述第一信道质量。
  13. 一种信关站切换方法,其特征在于,包括:
    目标信关站接收源信关站发送的第三指示信息,所述第三指示信息用于指示所述目标信关站向所述源信关站反馈第二信道质量,所述第二信道质量用于表征终端设备经由卫星至所述目标信关站的链路的质量;
    所述目标信关站确定所述第二信道质量;
    所述目标信关站向所述源信关站发送所第二信道质量。
  14. 根据权利要求13所述的方法,其特征在于,所述目标信关站确定所述第二信道质量,包括:
    所述目标信关站接收来自所述终端设备且经由所述卫星转发的上行参考信号;
    所述目标关口站根据所述上行参考信号,确定所述第二信道质量。
  15. 根据权利要求13或14所述的方法,其特征在于,所述第三指示信息还用于指示上行参考信号所在的传输资源,所述上行参考信号用于检测第一信道质量。
  16. 一种通信装置,其特征在于,包括:
    处理单元,用于检测出来自源信关站且经由卫星转发的下行信号的质量低于第一阈值;
    收发单元,用于向所述源信关站发送第一指示信息,所述第一指示信息用于指示第一信道质量低于所述第一阈值,所述第一信道质量用于表征终端设备经由卫星至所 述源信关站之间的链路的质量。
  17. 根据权利要求16所述的装置,其特征在于,
    所述收发单元,在向所述源信关站发送第一指示信息之后,还用于向所述卫星发送上行参考信号,所述上行参考信号用于供所述源信关站检测所述第一信道质量,以及目标信关站检测第二信道质量,所述第二信道质量用于表征所述终端设备经由卫星至所述目标信关站之间的链路的质量。
  18. 根据权利要求16所述的装置,其特征在于,所述第一指示信息为上行参考信号,所述上行参考信号用于供所述源信关站检测所述第一信道质量,以及所目标信关站检测第二信道质量,所述第二信道质量用于表征所述终端设备经由所述卫星至所述目标信关站之间的链路的质量。
  19. 根据权利要求17或18所述的装置,其特征在于,
    所述收发单元,还用于接收所述源信关站经由所述卫星发送的第二指示信息,所述第二指示信息用于指示所述上行参考信号的传输资源。
  20. 一种通信装置,其特征在于,包括:
    发送单元,用于向目标信关站发送第三指示信息,所述第三指示信息用于指示所述目标信关站向源信关站反馈第二信道质量,所述第二信道质量用于表征终端设备经由卫星至所述目标信关站的链路的质量;
    接收单元,用于接收来自所述目标信关站的所述第二信道质量;
    处理单元,用于利用所述第二信道质量和第一信道质量,确定是否将所述终端设备切换至所述目标信关站,所述第一信道质量用于表征所述终端设备经由卫星至所述源信关站之间的链路的质量。
  21. 根据权利要求20所述的装置,其特征在于,
    所述处理单元,在所述发送单元向目标信关站发送第三指示信息之前,还用于确定出所述第一信道质量低于第一阈值。
  22. 根据权利要求20所述的装置,其特征在于,
    所述接收单元,在所述发送单元向目标信关站发送第三指示信息之前,还用于接收来自所述终端设备且经由所述卫星转发的第一指示信息,所述第一指示信息用于指示所述终端设备经由所述卫星至所述源信关站的链路的信道质量低于第一阈值。
  23. 根据权利要求22所述的装置,其特征在于,当所述第一指示信息为预设结构的上行参考信号时,所述上行参考信号还用于供所述源信关站检测所述第一信道质量,以及所目标信关站检测所述第二信道质量。
  24. 根据权利要求20-23任一项所述的通信装置,其特征在于,
    当所述第一信道质量小于第二阈值、且所述第二信道质量大于或等于所述第二阈值时,所述处理单元,用于将所述终端设备从所述源信关站切换至所述目标信关站;
    或者,
    当所述第一信道质量小于第二阈值、且所述第二信道质量大于或等于所述第二阈值时,所述处理单元,用于将目标区域内的各终端设备从所述源信关站切换至所述目标信关站,所述目标区域为所述终端设备所在的小区或波束覆盖区,所述小区包含至少一个波束覆盖区,所述小区包含于所述卫星的覆盖范围内。
  25. 根据权利要求20-23任一项所述的通信装置,其特征在于,
    当所述第一信道质量小于第二阈值、且所述第二信道质量小于所述第二阈值时,所述处理单元,用于对所述终端设备执行卫星切换;
    或者,
    当所述第一信道质量小于第二阈值、且所述第二信道质量小于所述第二阈值时,所述处理单元,用于对目标区域内的各终端设备执行卫星切换,所述目标区域为所述终端设备所在的小区或波束覆盖区,所述小区包含至少一个波束覆盖区,所述小区包含于所述卫星的覆盖范围内。
  26. 根据权利要求20-25任一项所述的装置,其特征在于,
    所述发送单元,在所述接收单元接收来自所述目标信关站的所述第二信道质量之前,还用于经由所述卫星向所述终端设备发送第二指示信息,所述第二指示信息用于指示传输上行参考信号的传输资源,所述上行参考信号用于检测所述第一信道质量。
  27. 根据权利要求20-26任一项所述的装置,其特征在于,所述第三指示信息还用于指示上行参考信号所在的传输资源,所述上行参考信号用于检测所述第一信道质量。
  28. 一种通信装置,其特征在于,包括:
    接收单元,用于接收源信关站发送的第三指示信息,所述第三指示信息用于指示目标信关站向所述源信关站反馈第二信道质量,所述第二信道质量用于表征终端设备经由卫星至所述目标信关站的链路的质量;
    处理单元,用于确定所述第二信道质量;
    发送单元,用于向所述源信关站发送所第二信道质量。
  29. 根据权利要求28所述的装置,其特征在于,
    所述接收单元,还用于接收来自所述终端设备且经由所述卫星转发的上行参考信号;
    所述处理单元,用于根据所述上行参考信号,确定所述第二信道质量。
  30. 根据权利要求29所述的装置,其特征在于,所述第三指示信息还用于指示上行参考信号所在的传输资源,所述上行参考信号用于检测第一信道质量。
  31. 一种通信装置,其特征在于,包括:处理器、存储器,所述存储器用于存储指令,所述处理器用于执行所述存储器中存储的指令,实现如权利要求1~4任一项所述的方法;或者,实现如权利要求5~12任一项所述的方法;或者,实现如权利要求13~15任一项所述的方法。
  32. 一种计算机可读存储介质,其特征在于,用于存储计算机程序或指令,当所述计算机程序或指令在通信装置上运行时,使得所述通信装置执行如权利要求1~4任一项所述的方法;或者,使得所述通信装置执行如权利要求5~12任一项所述的方法;或者,使得所述通信装置执行如权利要求13~15任一项所述的方法。
  33. 一种芯片,其特征在于,所述芯片包括可编程逻辑电路和输入接口,所述输入接口用于获取待处理的数据,所述逻辑电路用于对待处理的数据执行如权利要求1~4任一项所述的方法;或者,如权利要求5~12任一项所述的方法;或者,如权利要求13~15任一项所述的方法。
  34. 一种计算机程序产品,其特征在于,当所述计算机程序产品在电子设备上运行时,使得所述电子设备执行如权利要求1~15任一项所述的方法。
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