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WO2025139660A1 - Procédé et appareil de communication, et système - Google Patents

Procédé et appareil de communication, et système Download PDF

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Publication number
WO2025139660A1
WO2025139660A1 PCT/CN2024/136773 CN2024136773W WO2025139660A1 WO 2025139660 A1 WO2025139660 A1 WO 2025139660A1 CN 2024136773 W CN2024136773 W CN 2024136773W WO 2025139660 A1 WO2025139660 A1 WO 2025139660A1
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WO
WIPO (PCT)
Prior art keywords
information
network device
access network
cell
service
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2024/136773
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English (en)
Chinese (zh)
Inventor
盛敏
白卫岗
孟贤
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of WO2025139660A1 publication Critical patent/WO2025139660A1/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • the present application relates to the field of communication technology, and in particular to a communication method, device and system.
  • the terrestrial mobile communication network provides convenient services, but in areas such as mountainous areas, deserts or oceans, the coverage of the terrestrial mobile communication network is affected due to the difficulty in setting up ground base stations.
  • non-terrestrial networks have become a supplement to the terrestrial mobile communication system.
  • NTN includes scenarios such as satellite networks, high-altitude platforms or drones. It has significant advantages such as global coverage, long-distance transmission, flexible networking, convenient deployment and no geographical restrictions. It has been widely used in many fields such as maritime communications, positioning navigation, disaster relief, scientific experiments, video broadcasting or earth observation.
  • the fifth generation (5th generation, 5G) mobile communication network and satellite networks are integrated with each other, learning from each other's strengths and weaknesses, and jointly forming a global seamless coverage of sea, land, air, space and ground integrated integrated communication network to meet users' ubiquitous and diverse business needs.
  • the next generation satellite network generally presents a trend of ultra-dense network (UDN).
  • UDN ultra-dense network
  • the scale of satellite network has developed from 66 satellites in Iridium constellation to 720 satellites in OneWeb constellation, and finally extended to 12000+ satellites in Starlink ultra-dense low earth orbit (LEO) satellite constellation, where satellite constellation is a collection of satellites that can work normally after being launched into orbit.
  • LEO Starlink ultra-dense low earth orbit
  • LEO satellite network is a kind of satellite network that is more suitable for realizing personal mobile communication, but due to the large number of satellites included in LEO satellite network and the high-speed movement characteristics of LEO satellites in general, when a LEO satellite 1 leaves the ground cell 1 covered by it due to movement and the new LEO satellite 2 takes over the coverage of the cell 1, it is equivalent to executing the handover on the network side (for example, the base station covering the cell 1 is switched from the base station of LEO satellite 1 to the base station of LEO satellite 2), and the terminal equipment in the cell 1 needs to establish a communication connection with the new LEO satellite 2. If the terminal device performs a certain service under the coverage of LEO satellite 1, in order to ensure the service continuity of the service, LEO satellite 2 needs to continue to provide resources for the service of the switched terminal device, so that the terminal device can continue to perform the service through the resources.
  • the resources provided by the LEO satellite for this service may be limited. When all the resources provided by the LEO satellite for this service are occupied, the terminal device that is switched over will not be able to provide service resources, resulting in service interruption of the terminal device. Alternatively, the LEO satellite may provide more resources for executing the service, but if the LEO satellite provides too many resources, there may be a waste of resources, reducing resource utilization.
  • Embodiments of the present application provide a communication method, device, and system for dynamically adjusting a threshold of resources for executing a first service.
  • a communication method which can be executed by a first access network device, the first access network device is located in a mobile device, and the mobile device includes, for example, a satellite, a vehicle, a ship, or an airplane.
  • the first access network device can be a satellite, or can be other devices including a satellite, or can also be a chip system (or, chip) or other functional modules, the chip system or functional module can realize the function of the satellite, and the chip system or functional module is, for example, set in a satellite.
  • the success rate related to the first service for example, includes a success rate of establishing a session for transmitting the first service and/or includes a success rate of executing the first service.
  • the resources related to the first service for example, include resources for establishing a session for transmitting the first service and/or include resources for executing the first service.
  • the first information represents the success rate of the terminal device related to the first service under the coverage of the first access network device or the second access network device, and the success rate related to the first service reflects the demand for resources of the first service to a certain extent. For example, if the success rate is low, it may be caused by insufficient resources. In order to improve the success rate, more resources can be allocated to the first service; and if the success rate is high, it indicates that the resources are relatively sufficient, then the resources related to the first service can be appropriately reduced, so as to ensure the success rate related to the first service and use more resources for other purposes. Therefore, the first access network device can adjust the first threshold of the first resource according to the success rate, so that the first threshold can meet the current demand of the first cell for the first resource.
  • the embodiment of the present application can set the threshold according to the actual resource demand, thereby reducing the failure of the first service caused by insufficient first resources, which is conducive to improving the quality of communication services, and can also reduce the waste of resources caused by unreasonable resource threshold settings, so as to improve resource utilization.
  • the terminal device is located within the coverage of the first cell before and after establishing a communication connection with the first access network device, or the terminal device is located within the coverage of the second cell before establishing a communication connection with the first access network device. If the terminal device is located within the coverage of the first cell before and after establishing a communication connection with the first access network device, it indicates that the terminal device establishes a communication connection with the first access network device due to the switching of the access network device covering the first cell (switching from the second access network device to the first access network device). In this case, the terminal device may or may not have moved, but the terminal device has not moved out of the coverage of the first cell.
  • a way for the first access network device to obtain the first information of the first cell includes, for example, receiving the first information, and the first information is used to characterize the success rate of the terminal device related to the first service when it is covered by the second access network device. For example, when the access network device covering the first cell is switched (from the second access network device to the first access network device), the second access network device can send the first information to the first access network device.
  • the first information characterizes the success rate of the terminal device related to the first service when it is covered by the second access network device before the first access network device covers the first cell, it also reflects the demand for resources for executing the first service before the first access network device covers the first cell, and this demand usually does not suddenly change before and after the first access network device covers the first cell, so the first threshold determined by the first access network device based on this demand can meet the current demand of the first cell for the first resources.
  • the first access network device may receive the first information in a variety of implementation manners.
  • one implementation manner in which the first access network device receives the first information includes that the first information is included in the second information, and the second information also includes information used to indicate that the first access network device covers the first cell.
  • the second information comes from the core network device, and is information for the core network device to notify the first access network device that it covers the first cell.
  • another implementation manner in which the first access network device receives the first information includes that the first information is included in the third information, and the third information is also used to configure the transmit beam and/or receive beam of the first cell.
  • the third information comes from the second access network device, and is information for the second access network device to send the beam configuration of the first cell to the first access network device.
  • the first information of the first cell before the access network device switches can be delivered to the first access network device. Since the first information represents the success rate of the terminal device related to the first service when covered by the second access network device before the first access network device covers the first cell, it also reflects the demand for resources for executing the first service before the first access network device covers the first cell, and this demand usually does not suddenly change before and after the first access network device covers the first cell.
  • the first access network device can determine the first threshold based on the first information before the first access network device covers the first cell to meet the current demand of the first cell for the first resource.
  • the first information may include a first parameter and/or a second parameter.
  • the first parameter is used to characterize the success rate of the terminal device continuing the first service when it is covered by the first access network device or the second access network device.
  • continuing the first service means that before the terminal device performs the first service-related process under the coverage of the first access network device, it performs the first service-related process under the coverage of the second access network device.
  • the first parameter is the success rate of the terminal device continuing to perform the first service-related process under the coverage of the first access network device after switching from the second access network device to the first access network device.
  • the sending unit and the receiving unit may be the same functional module, which is called a transceiver unit, and the functional module can realize the sending function and the receiving function; or, the sending unit and the receiving unit may be different functional modules, and the transceiver unit is a general term for these functional modules.
  • the transceiver unit (or, sending unit) is used to send first information
  • the first information is used to configure first resources
  • the first resources include resources related to the first service for the terminal device when it is covered by the first access network device
  • the number of first resources is less than or equal to the first threshold
  • the first threshold is used to indicate the upper limit of the number of first resources in the first cell
  • the first threshold is determined based on the first information.
  • the first cell Before being covered by the first access network device, the first cell is covered by the second access network device.
  • the first information is used to characterize the success rate of the terminal device related to the first service when it is covered by the first access network device or the second access network device.
  • a communication device may be the core network device described in any one of the first to fourth aspects.
  • the communication device has the functions of the core network device.
  • the core network device is, for example, a core network device, or other devices including the functions of a core network device, or a chip system (or, chip) or other functional modules, which can implement the functions of the core network device, and the chip system or functional module is, for example, arranged in the core network device.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication device includes a processing unit (sometimes also referred to as a processing module) and a transceiver unit (sometimes also referred to as a transceiver module).
  • the transceiver unit can implement a sending function and a receiving function.
  • a sending unit sometimes also referred to as a sending module
  • a receiving unit sometimes also referred to as a receiving module
  • the sending unit and the receiving unit may be the same functional module, which is called a transceiver unit, and the functional module can realize the sending function and the receiving function; or, the sending unit and the receiving unit may be different functional modules, and the transceiver unit is a general term for these functional modules.
  • the communication device also includes a storage unit (sometimes also referred to as a storage module), and the processing unit is used to couple with the storage unit and execute the program or instructions in the storage unit, so that the communication device can perform the functions of the core network device described in any one of the first to fourth aspects above.
  • a storage unit sometimes also referred to as a storage module
  • a communication device may be an access network device, or a chip or chip system used in an access network device.
  • the communication device includes a communication interface and a processor, and optionally, also includes a memory.
  • the memory is used to store a computer program, and the processor is coupled to the memory and the communication interface.
  • the communication device executes the method performed by the access network device (such as the first access network device or the second access network device) in the above aspects.
  • a chip system comprising a processor and an interface, wherein the processor is used to call and execute instructions from the interface so that the chip system implements the above-mentioned methods.
  • FIG. 9 is a schematic diagram of another device provided in an embodiment of the present application.
  • the number of nouns means “singular noun or plural noun", that is, “one or more”.
  • At least one means one or more, and “plural” means more than two (including two).
  • “And/or” describes the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.
  • the character “/” generally indicates that the previous and next associated objects are in an “or” relationship.
  • A/B means: A or B.
  • At least one of the following items” or similar expressions refers to any combination of these items, including any combination of single items or plural items.
  • At least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.
  • the technology provided in the embodiments of the present application can be applied to various communication systems, such as satellite communication systems, high altitude platform (HAPS) communication systems, drones and other non-terrestrial network (NTN) systems; for example, integrated communication and navigation (IcaN) systems, global navigation satellite systems (GNSS) and ultra-dense low-orbit satellite communication systems.
  • the communication system used in the embodiments of the present application can be integrated with the ground communication system.
  • the ground communication system can be a fourth generation (4th generation, 4G) communication system (for example, long term evolution (LTE) system), a worldwide interoperability for microwave access (WiMAX) communication system, a fifth generation (5G) communication system (for example, a new radio (NR) system), or a future communication system.
  • 4G fourth generation
  • LTE long term evolution
  • WiMAX worldwide interoperability for microwave access
  • 5G fifth generation
  • NR new radio
  • the base station can be: a macro base station (such as 110a in Figure 1A), a micro base station, a pico base station, an indoor station (such as 110b in Figure 1A), a small station, a relay station, etc. Multiple base stations can support networks with the same access technology or networks with different access technologies.
  • the base station may include one or more co-sited or non-co-sited transmission and receiving points.
  • the access network device may also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario.
  • the access network device may also be a server, etc.
  • the network device in the V2X technology may be a road side unit (RSU).
  • the base station can communicate with the terminal device, or it can communicate with the terminal device through a relay station.
  • the terminal device can communicate with multiple base stations in different access technologies.
  • the core network device is used to implement functions such as mobility management, data processing, session management, policy and billing.
  • the names of the devices that implement the core network functions in systems with different access technologies may be different, and the embodiments of the present application do not limit this.
  • the core network equipment includes: access and mobility management function (access and mobility management function, AMF), session management function (session management function, SMF), policy control function (policy control function, PCF) or user plane function (user plane function, UPF), etc.
  • the access network equipment may include one or more logical network elements such as a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU).
  • the CU and DU may be set separately, or may be included in the same network element, such as a baseband unit (BBU).
  • BBU baseband unit
  • the RU may be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).
  • RRU remote radio unit
  • AAU active antenna unit
  • RRH remote radio head
  • CU or CU-CP and CU-UP
  • DU or RU may also have different names, but those skilled in the art can understand their meanings.
  • CU may also be called an open CU (O-CU)
  • DU may also be called O-DU
  • CU-CP may also be called O-CU-CP
  • CU-UP may also be called O-CU-UP
  • RU may also be called O-RU.
  • O-CU open CU
  • CU-CP may also be called O-CU-CP
  • CU-UP may also be called O-CU-UP
  • RU may also be called O-RU.
  • Any unit of CU (or CU-CP, CU-UP), DU and RU in the embodiments of the present application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.
  • the network device is a distributed architecture, for example, the network device includes a CU and a DU, or includes a CU-CP, a CU-UP and a DU
  • the network device sends information to the UE, specifically, the DU included in the network device sends information to the UE; the network device receives information from the UE, specifically, the DU included in the network device receives information from the UE.
  • the form of the access network device is not limited.
  • the device for realizing the function of the access network device may be the access network device; or it may be a device capable of supporting the access network device to realize the function, such as a chip system.
  • the device may be installed in the access network device or used in combination with the access network device.
  • a terminal device is a device with wireless transceiver capabilities. It can be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device built into the above devices (for example, a communication module, a modem, or a chip system, etc.).
  • V2X device When the terminal device is applied to V2X, it can also be called V2X device, for example, smart car (or intelligent car), digital car, unmanned car (or driverless car or pilotless car or automobile), self-driving car (or autonomous car), pure electric vehicle (or battery EV), hybrid electric vehicle (HEV), range extended EV (REEV), plug-in hybrid electric vehicle (PHEV), new energy vehicle (new energy vehicle), roadside unit (road site unit, RSU).
  • the terminal device can also be a device in D2D communication, for example, an electric meter, a water meter, etc.
  • the terminal device can also be a terminal device in an IoT system.
  • IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things.
  • the various terminal devices introduced above if located on a vehicle (for example, placed in a vehicle or installed in a vehicle), can be considered as vehicle-mounted terminal devices, which are also called on-board units (OBU).
  • the terminal device of the present application can also be an on-board module, on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units.
  • the vehicle can implement the method of the present application through the built-in on-board module, on-board module, on-board component, on-board chip or on-board unit.
  • the terminal device may sometimes be referred to as user equipment (UE), terminal, access station, UE station, remote station, wireless communication device, terminal device, or user device, etc.
  • UE user equipment
  • the embodiment of the present application does not limit the device form of the terminal.
  • the device used to implement the function of the terminal may be a terminal; it may also be a device that can support the terminal to implement the function, such as a chip system.
  • the device can be installed in the terminal or used in combination with the terminal.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the access network equipment and terminal equipment can be fixed or movable.
  • the access network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons, and artificial satellites.
  • the embodiments of the present application do not limit the application scenarios of the access network equipment and terminal equipment.
  • the helicopter or drone 120i in Figure 1A can be configured as a mobile base station.
  • UE 120j that access the wireless access network 100 through 120i
  • UE 120i is a base station; but for the base station 110a, 120i is a UE, that is, 110a and 120i communicate through the wireless air interface protocol.
  • 110a and 120i can also communicate through the interface protocol between base stations.
  • relative to 110a, 120i is also a base station.
  • base stations and UEs can be collectively referred to as communication devices, 110a and 110b in Figure 1A can be referred to as communication devices with base station functions, and 120a-120j in Figure 1A can be referred to as communication devices with UE functions.
  • Core network equipment refers to equipment in the core network that provides service support for terminals.
  • core network equipment are: access and mobility management function (AMF) entity, session management function (SMF) entity, user plane function (UPF) entity, etc., which are not listed here one by one.
  • AMF access and mobility management function
  • SMF session management function
  • UPF user plane function
  • the AMF entity can be responsible for terminal access management and mobility management
  • the SMF entity can be responsible for session management, such as user session establishment, etc.
  • the UPF entity can be a functional entity of the user plane, mainly responsible for connecting to the external network.
  • the entity in this application can also be referred to as a network element or a functional entity.
  • the AMF entity can also be referred to as an AMF network element or an AMF functional entity.
  • SMF entity can also be referred to as an SMF network element or an SMF functional entity, etc.
  • the form of the core network device is not limited, and the device for implementing the function of the core network device can be the core network device; or it can be a device that can support the core network device to implement the function, such as a chip system.
  • the device can be installed in the core network device or used in conjunction with the core network device.
  • the access network device for realizing the access network device function is located in a movable device
  • the movable device includes, for example, a movable device on land or a non-terrestrial device
  • the movable device on land includes, for example, a vehicle-mounted device or a handheld device
  • the non-terrestrial movable device includes, for example, a device on the water surface or a device in the air.
  • the communication system can also be called a non-terrestrial network (NTN) communication system.
  • NTN non-terrestrial network
  • NTN non-terrestrial network
  • NTN includes nodes such as satellite networks, high-altitude platforms and drones, and has significant advantages such as global coverage, long-distance transmission, flexible networking, convenient deployment and no geographical restrictions. It has been widely used in multiple fields such as maritime communications, positioning navigation, disaster relief, scientific experiments, video broadcasting and earth observation.
  • Ground 5G networks and satellite networks are mutually integrated, complementing each other's strengths and weaknesses, and jointly constitute a global seamless coverage of sea, land, air, space and ground integrated integrated communication network to meet the user's ubiquitous multiple business needs.
  • NTN communication takes satellite communication as an example, or the NTN communication system takes a satellite system as an example.
  • the NTN communication system includes a satellite 201 and a terminal device 202.
  • the explanation of the terminal device 202 can refer to the above-mentioned description of the terminal device.
  • Satellite 201 can also be called a high-altitude platform, a high-altitude aircraft, or a satellite base station.
  • the satellite 201 can be regarded as one or more network devices in the terrestrial network communication system architecture.
  • the satellite 201 provides communication services to the terminal device 202, and the satellite 201 can also be connected to the core network device.
  • the structure and function of the satellite 201 can also refer to the above description of the network device.
  • the communication method between the satellite 201 and the terminal device 202 can also refer to the description in the above FIG. 1A. It will not be repeated here.
  • the scheme in the embodiment of the present application can also be applied to the terrestrial communication network directly or after being slightly modified in a method that can be thought of by those skilled in the art, and it will not be repeated here.
  • FIG. 1C is a schematic diagram of the architecture of a satellite mobile communication system that can be applied to an embodiment of the present application.
  • the satellite mobile communication system includes: 2 terminal devices (which can be referred to as terminals), 2 satellite base stations (5G base stations 1-2 as shown in Figure 1C), a ground station and a 5G core network.
  • Satellite base station also known as satellite base station (satellite gNB, S-gNB).
  • the satellite base station and the terminal device can communicate through the 5G new air interface.
  • the two satellite base stations can communicate through the Xn interface.
  • the satellite base station is connected to the ground station through the NG interface.
  • the ground station is connected to the core network through the NG interface, and the NG interface can be either wired or wireless.
  • Satellites can usually form multiple beams, each beam similar to a cell/sector in a terrestrial mobile communication system (such as LTE/NR).
  • 5G base station mainly used to provide wireless access services, dispatch wireless resources to access terminal devices, provide reliable wireless transmission protocols and data encryption protocols, etc.
  • the core network consists of multiple functional units, which can be divided into control plane functional units and user plane processing units.
  • the functional units of the control plane include access and mobility management function (AMF) and session management function network elements (SMF).
  • AMF is responsible for user access management, security authentication, and mobility management.
  • SMF is responsible for session management of terminal devices (including session establishment, modification and release), selection and reselection of user plane function network elements, allocation of Internet protocol (IP) addresses of terminal devices, quality of service (QoS) control, selection of UPF network elements that provide message forwarding functions, etc.
  • the user plane processing unit includes: user plane function (UPF) unit, UPF is responsible for managing the transmission of user plane data, traffic statistics and other functions.
  • UPF user plane function
  • Ground station mainly responsible for forwarding signaling and business data between satellite and base station, or between satellite and core network.
  • 5G New Radio refers to the wireless link between terminal devices and base stations.
  • Xn interface represents the interface between 5G satellite base stations, mainly used for signaling interaction such as switching.
  • NG interface refers to the interface between the 5G base station and the 5G core network, or the interface between the ground station and the core network, or the interface between the satellite base station and the ground station (in this case, the interface is a wireless link), which mainly interacts with the core network's non-access stratum (NAS) and other signaling, as well as user business data.
  • NAS non-access stratum
  • the working modes of payloads can be divided into staring (earth-fixed or quasi-earth fixed) mode and non-staring (earth-moving) mode.
  • the satellite's beam coverage will move with the satellite.
  • the satellite will dynamically adjust its own beam pointing through technologies such as satellite air attitude adjustment and phased array parameter adjustment, so that the beam approximately covers the same area on the ground.
  • the staring mode can increase the length of time the satellite provides services to the terminal equipment and reduce the frequency of inter-satellite switching.
  • LEO satellite 1 moves away from the current ground cell 1 and LEO satellite 2 takes over the coverage of the ground cell, it is equivalent to performing a handover on the network side (for example, the base station covering the cell 1 is switched from the base station of LEO satellite 1 to the base station of LEO satellite 2), and the terminal device in the cell 1 needs to establish a communication connection with LEO satellite 2.
  • the terminal device moves at high speed from the ground cell 1 covered by LEO satellite 1 to the ground cell 2 covered by LEO satellite 2
  • the terminal device side will perform mobility handover, and the terminal device needs a new LEO satellite 2 to establish a communication connection.
  • the process of the terminal device switching from LEO satellite 1 to establishing a communication connection with LEO satellite 2 can be called inter-satellite handover.
  • the present application provides a communication method, in which the inter-satellite switching process of the terminal device is implemented, thereby improving the service continuity of the terminal device during the inter-satellite switching triggered by the movement of the satellite or the terminal device.
  • LEO satellite 2 needs to continue to provide resources for the service of the switched terminal device, so that the terminal device can continue to perform the service through the resources.
  • the resources provided by the LEO satellite for the service may be limited. When all the resources provided by the LEO satellite for the service are occupied, the service resources cannot be provided to the switched terminal device, resulting in the interruption of the terminal device's service.
  • the LEO satellite may also provide more resources for executing the service, but if the LEO satellite provides too many resources, some of the resources may never be used, resulting in the waste of these resources and reducing resource utilization.
  • Resource management refers to the planning and scheduling of resources of mobile communication systems. Reasonable resource management helps to improve resource utilization, thereby improving the service quality of mobile communication systems.
  • Resource management can include channel resource management and device resource management.
  • Channel resource management refers to the planning and scheduling of air interface resources of mobile communication systems. The goal of channel resource management is to efficiently use limited channel resources and ensure the service quality of mobile communication systems.
  • Device resource management can also be understood as the management of on-board capabilities, which is used to manage one or more resources of satellite computing resources or storage resources.
  • the first threshold of the first resource can be adjusted according to the success rate, so that the first threshold can meet the current demand of the first cell for the first resource.
  • the embodiment of the present application can set the threshold according to the actual resource demand, thereby reducing the failure of the first service caused by insufficient first resources, which is conducive to improving the quality of communication services, and can also reduce the waste of resources caused by unreasonable resource threshold settings, so as to improve resource utilization.
  • the communication method provided in the embodiment of the present application is further described in detail below in conjunction with the accompanying drawings.
  • the various embodiments of the present application can be performed by an access network device, a core network device, and a terminal device.
  • the access network device is, for example, an access network device, or, for example, a functional module capable of executing the method provided in the embodiment of the present application, which can be set in the access network device, such as a chip system in the access network device; or the functional module can also be set independently of the access network device.
  • the access network device being a RAN device.
  • the core network device is, for example, a core network device, or, for example, a functional module capable of executing the method provided in the embodiment of the present application, which can be set in the core network device, such as a chip system in the core network device; or the functional module can also be set independently of the core network device.
  • the terminal device is, for example, a terminal device, or, for example, a functional module capable of executing the method provided in the embodiment of the present application, which can be set in the terminal device, such as a chip system in the terminal device; or the functional module can also be set independently of the terminal device.
  • the terminal device being a UE.
  • the access network device is an access network device
  • the core network device is a core network device
  • the terminal device is a terminal device.
  • the methods provided in each embodiment of the present application can be applied to the network architecture shown in Figures 1A to 1C.
  • the core network device involved in each embodiment of the present application may be the core network device in Figures 1A to 1C
  • the access network device involved in each embodiment of the present application may be the access network device in Figures 1A to 1C
  • the terminal device involved in each embodiment of the present application may be the terminal device in Figures 1A to 1C.
  • the steps represented by dotted lines in the accompanying drawings corresponding to the various embodiments of the present application are all optional steps.
  • Figure 3 shows the process of the method.
  • Step 301 The first RAN device obtains first information of the first cell covered by it, where the first information is used to characterize the success rate of the UE related to the first service when the UE is covered by the first RAN device or the second RAN device.
  • the first information may be replaced by the first information used to characterize the success rate of the UE related to the first service when the UE is covered by the first RAN device or the second RAN device.
  • the first cell is covered by the second access network device before being covered by the first access network device.
  • the first cell being covered by the second RAN device may also be replaced by the first cell being provided by the second RAN device, or replaced by the first cell being served by the second RAN device, or replaced by the first cell being served by the second RAN device, or replaced by the first cell being watched by the second RAN device.
  • the first RAN device is located in a removable device.
  • the first RAN device is located in a satellite.
  • the first RAN device is a removable device.
  • the first RAN device is a satellite.
  • the satellite is, for example, a LEO satellite.
  • the first RAN device may also be located in other removable devices, which is not limited.
  • the second RAN device is located in a removable device.
  • the second RAN device is located in a satellite.
  • the second RAN device is a removable device.
  • the second RAN device is a satellite.
  • the satellite is, for example, a LEO satellite.
  • the second RAN device may also be located in other removable devices, which is not limited.
  • the first RAN device and/or the second RAN device operates in a staring mode, or the first RAN device and/or the second RAN device adopts a staring mode, that is, during the period when the first RAN device or the second RAN device covers the first cell, the first RAN device or the second RAN device dynamically adjusts its own beam pointing through technologies such as satellite air attitude adjustment and phased array parameter adjustment, so that the beam approximately covers the same area on the ground, that is, the first cell, thereby increasing the coverage time of the first cell.
  • technologies such as satellite air attitude adjustment and phased array parameter adjustment
  • the first cell covered by the first RAN device includes that the first RAN device currently covers the first cell. That is, the first RAN device is currently providing network services for UEs in the first cell. Alternatively, the first cell covered by the first RAN device includes that the first RAN device is about to cover the first cell. For example, the first RAN device receives second information, and the second information includes information used to indicate that the first RAN device covers the first cell. The information can also be described as switching information, that is, the switching information is used to indicate that the RAN device covering the first cell is switched from the second RAN device to the first RAN device.
  • the second information can be switching signaling, or the second information is included in the switching signaling, and the switching signaling can also be described as a switching message or a switching request, etc. Then, the first RAN device determines that the first cell is about to be covered based on the second information. The second information is sent by the second RAN device or the core network device, for example.
  • the core network device may be a device responsible for access management and mobility management of the terminal device.
  • the core network device is an AMF.
  • the AMF may be deployed on the ground.
  • the ground communication system is a 5G communication system
  • the AMF may be an AMF in the 5G communication system.
  • the AMF may also be deployed in a mobile device.
  • the AMF may be deployed on a satellite.
  • the first information is used to characterize the success rate of the UE related to the first service when the UE is covered by the first RAN device or the second RAN device, or can also be described as the success rate of the UE related to the first service in the first cell.
  • the first information is used to characterize the success rate of the UE related to the first service in the first cell within a first duration. If the first cell is covered by the first RAN device within the first duration, the first information is used to characterize the success rate of the UE related to the first service when the UE is covered by the first RAN device within the first duration. If the first cell is covered by the second RAN device within the first duration, the first information is used to characterize the success rate of the UE related to the first service when the UE is covered by the second RAN device within the first duration.
  • the first service can be any service, for example, the first service includes one or more of a voice call (or voice call) service, a video service or a data service, without limitation.
  • the relevant process of the first service includes establishing a session for transmitting the first service (or can also be described as establishing a connection for transmitting the first service), and/or executing the first service (for example, carrying service data on a newly established session), and the session is, for example, a protocol data unit (PDU) session or a voice bearer, or other types of sessions, without limitation.
  • the success of the first service includes, and may include the successful execution of each stage of the first service. For example, the establishment of a session for transmitting the first service is successful, and/or the execution of the first service is successful. Alternatively, the success of the first service includes that the entire process of the UE executing the first service is completed or ended.
  • the success rate related to the first service includes: the success rate of establishing a session for transmitting the first service, and/or the success rate of executing the first service.
  • the successful execution of the first service may mean that the data packet of the first service is transmitted, or the packet loss rate of the first service is less than a certain value, or there is a data packet transmission success of the first service, which is not limited.
  • the first RAN device obtains the first information of the first cell, including the first RAN device determining the first information according to the relevant data of the first service when the first RAN device covers the first cell. For example, if the first RAN device has covered the first cell, the first RAN device may determine the first information according to the relevant data of the first service when the first RAN device covers the first cell, and the first information determined by the first RAN device is used to represent the success rate related to the first service when the UE is covered by the first RAN device.
  • the first RAN device obtains the first information of the first cell, further comprising: the first RAN device receives the first information.
  • the first information may come from, for example, a core network device or a second RAN device.
  • the first information represents the success rate of the terminal device related to the first service when the terminal device is covered by the second access network device before the first access network device covers the first cell, which also reflects the demand for resources for executing the first service-related process before the first access network device covers the first cell.
  • the first threshold determined by the first access network device according to the demand can meet the current demand of the first cell for the first resource, thereby facilitating the first RAN device to determine the first threshold in combination with the first information.
  • the first RAN device receives the first information and may adopt any one of the following implementation methods:
  • Implementation method 1 When the core network device determines that the RAN device of the first cell is switched from the second RAN device to the first RAN device, the core network device may send the first information to the first RAN device.
  • the first information may be included in the second information, and the second information also includes information used to indicate that the first AN device covers the first cell, which may also be described as switching information, that is, the switching information is used to indicate that the RAN device covering the first cell is switched from the second RAN device to the first RAN device.
  • the second information may be switching signaling, or the second information is included in the switching signaling, and the switching signaling may also be described as a switching message or a switching request, etc.
  • Implementation method 2 When the second RAN device determines that the RAN device of the first cell is switched from the second RAN device to the first RAN device, the second RAN device may send the first information to the first RAN device. For example, the second RAN device determines that the RAN device of the first cell is switched from the second RAN device to the first RAN device according to the fourth information sent by the core network device, and the second RAN device sends the third information to the first RAN device, and the third information is used to configure the transmit beam and/or receive beam of the first cell, and the first information may be included in the third information.
  • the third information includes the beam configuration information of the first cell, such as one or more of the position, power, frequency or bandwidth of the beam of the first cell, and the third information may also be called service configuration information or beam configuration information.
  • the second RAN device may request the first RAN device to cover the first cell, and the second RAN device may send a handover request to the first RAN device to indicate that the first RAN device covers the first cell, and the first information may be included in the handover request.
  • the UE is located within the coverage of the first cell of the RAN device before establishing a communication connection with the first RAN device and after establishing a communication connection with the first RAN device.
  • the UE is located within the coverage of the second cell before establishing a communication connection with the first RAN device. If the UE is located within the coverage of the first cell before establishing a communication connection with the first RAN device and after establishing a communication connection with the first RAN device, it indicates that the UE establishes a communication connection with the first RAN device due to the switching of the RAN device covering the first cell (switching from the second RAN device to the first RAN device).
  • the UE may or may not have moved, but the UE has not moved out of the coverage of the first cell. If the UE is located within the coverage of the second cell before establishing a communication connection with the first RAN device, it indicates that the UE establishes a communication connection with the first RAN device due to the movement of the UE. At this time, the RAN device covering the first cell may not have switched or may have switched, and there is no restriction on this.
  • the embodiments of the present application can be applied to a variety of communication scenarios and have a wide range of applications.
  • the UE establishes a communication connection with the first RAN device because the UE switches the RAN device to which it is connected, and the first resource is used for the UE to perform the first service-related process under the coverage of the first RAN device, which is equivalent to the first resource being a resource that needs to continue to perform the first service-related process due to the UE switching the RAN device to which it is connected (for example, the first resource can also be called a switching resource, etc.). Therefore, the first RAN device can flexibly adjust the threshold of the switching resource so that the first threshold can meet the demand of the first cell for the switching resource.
  • the UE when the second RAN device covers the first cell, the UE establishes a communication connection with the second RAN device, and when the UE is performing the first service, the RAN device covering the first cell switches from the second RAN device to the first RAN device, then the UE needs to establish a communication connection with the first RAN device, and needs to obtain the resources related to the first service from the first RAN device to continue to perform the related processes of the first service of the UE.
  • the first information may be determined based on a ratio of a first value to a second value, wherein the first value is the number of UEs that successfully perform the first service when covered by the second RAN device, and the second value is the number of UEs that initiate the first service when covered by the second RAN device.
  • a first parameter is used to characterize the success rate of the UE continuing the first service when it is covered by the first RAN device or the second RAN device.
  • continuing the first service means that before the UE performs the first service-related process under the coverage of the first RAN device, it performs the first service-related process under the coverage of the second RAN device.
  • the first parameter is the success rate of the UE continuing to perform the first service-related process after switching to the first RAN device. After the UE switches from the second RAN device to the first RAN device, it needs to use the resources allocated by the first RAN device for performing the first service to perform the related process of the first service.
  • the process of the UE switching to the first RAN device to continue to perform the related process of the first service can also be called switching. Therefore, the first parameter can also be called the switching success rate or the connection success rate.
  • the first parameter characterizes the success rate of establishing a connection session for the first service, and/or the success rate of the UE performing the first service after the connection session is established.
  • the UE is located within the coverage of the first cell before and after establishing a communication connection with the second RAN device, that is, due to the switching on the network side, the resources provided by the RAN device originally covering the first cell for executing the first service-related process will no longer be available, and the UE needs to execute the first service-related process under the coverage of the second RAN device, and therefore needs to obtain new resources from the second RAN device to continue executing the first service-related process.
  • the first UE is located within the coverage of the second cell before establishing a communication connection with the second RAN device. That is, the first UE is due to mobility switching, that is, it moves from the coverage of the second cell to the coverage of the first cell, and can no longer use the resources provided by the second cell for executing the first service-related process. The first UE needs to continue to execute the first service-related process in the first cell, and therefore needs to obtain new resources from the second RAN device to continue to execute the first service-related process.
  • both the satellite and the UE may be in constant motion.
  • the UE will enter the cell 2 covered by satellite 2 from the cell 1 covered by satellite 1, or the satellite 1 will leave the covered cell 1 and the cell 2 will continue to be covered by satellite 2.
  • satellite 2 is required to allocate new service resources to the UE to complete the switch to ensure the continuity of the service.
  • the service resources originally allocated by satellite 1 to the UE can no longer be used because of the removal of the UE.
  • the service resources can be recycled, and satellite 2 is required to allocate new service resources to the UE to achieve the purpose of resource switching for executing the first service without interrupting the first service.
  • the satellite communication system uses a reserved channel strategy to ensure that the voice call service is not interrupted when the UE switches from satellite 1 to satellite 2. That is, when satellite 1 determines that the UE will switch to the new satellite 2, it requests reserved channel resources for the UE in the channel resources of the satellite 2 to be connected through the intersatellite link, and the reserved channel resources are only for the UE to switch. For satellite 2, when a new reserved channel request arrives, if the number of channel resources reserved by satellite 2 is less than the reserved channel threshold, the reservation request is accepted; otherwise, the request is rejected.
  • satellite 1 obtains information such as the UE's location information, movement direction, speed, and access time, estimates the time when the UE leaves the cell covered by satellite 1 and the cell covered by satellite 2 to be connected, and requests reserved channel resources for the UE in the channel resources of satellite 2 to be connected through the intersatellite link, and the reserved channel resources are only for the UE to switch.
  • satellite 1 determines that it will leave the covered cell based on its own position information, direction of movement, speed and other information, or when the core network equipment notifies that the cell covered by satellite 1 will be switched to satellite 2
  • satellite 1 requests reserved channel resources for the UE in the channel resources of satellite 2 for the UE in the call through the inter-satellite link.
  • the reserved channel resources are only for UE switching.
  • the switching success rate can be determined according to the ratio of the third value to the fourth value.
  • the third value is the number of UEs that have successfully switched, and the UE that has successfully switched refers to a UE that successfully continues to execute the first service-related process when it is covered by the second RAN device after the switching is triggered, or a UE that successfully obtains resources allocated by the second RAN device for continuing to execute the first service-related process.
  • the fourth value is the number of UEs requesting switching, and the UE requesting switching refers to a UE that requests to continue to execute the first service-related process when it is covered by the second RAN device after the switching is triggered.
  • the switching success rate is the ratio of the third value to the fourth value, that is, p switch represents the switching success rate (that is, the first parameter), which can be calculated as follows:
  • NS success is the number of UEs that have successfully switched
  • NS request is the number of UEs that have requested switching.
  • a second parameter is used to characterize the success rate of the newly created first service when the UE is covered by the first RAN device or the second RAN device.
  • the newly created first service means that the UE has not been performing the first service before (it may be that the process related to the first service has not been performed at all, or the process related to the last execution of the first service has ended), and the UE initiates a service request to the first RAN device or the second RAN device, and creates a session for the first service based on the service request, and executes the first service after the session is created.
  • the newly created first service is the first service when the UE directly initiates a service request to the first RAN device or the second RAN device, and is distinguished from the first service switched from other RAN devices.
  • the process related to the newly created first service can also be called access, and the second parameter can also be called the access success rate.
  • the second parameter characterizes the success rate of establishing a new session for the first service, and/or the success rate of the UE executing the first service after the new session is established.
  • the access success rate can be determined based on the ratio of the fifth value to the sixth value.
  • the fifth value is the number of UEs that have successfully accessed, that is, the number of UEs that initiate access requests (or are called creation requests for the first service) and successfully implement the first service-related process when covered by the second RAN device, or the number of UEs that initiate access requests and successfully obtain resources allocated by the second RAN device for executing the first service-related process.
  • the fourth value is the number of UEs that request access (or are called requests to create the first service), that is, the number of UEs that initiate access requests (or are called creation requests for the first service).
  • the access success rate is the ratio of the fifth value to the sixth value, that is, p access represents the access success rate, which can be calculated as follows:
  • Na success is the number of UEs that successfully access
  • Na request is the number of UEs requesting access.
  • the RAN device (the first RAN device or the second RAN device) can obtain the number of UEs requesting access by obtaining the total number of UEs within its coverage area and the first activation factor.
  • the first activation factor represents the probability that the UE initiates the first service.
  • the first activation factor is a call activation factor, which is used to represent the proportion of UEs that are on calls at the same time or time period, or the probability that the UE initiates a call at the same time or time period.
  • the access success rate can be calculated as follows:
  • the second RAN device can calculate the handover success rate and access success rate of the first cell.
  • the second RAN device can transmit the handover success rate and access success rate to the first RAN device, or transmit the handover success rate and access success rate to the first RAN device via the core network device, for use in subsequent resource management strategies.
  • the handover success rate and access success rate of the first cell can also be calculated for use in subsequent resource management strategies.
  • the threshold of the first resource is used to indicate the upper limit of the number of handover resources in the first cell.
  • the first resource can be understood as a resource configured for implementing the UE handover process, or a resource reserved for implementing the UE handover, or a resource used after the UE is switched. The resource is only used for UE switching.
  • the threshold of the first resource can also be called a reserved resource threshold. If the resource is a channel resource, the threshold of the first resource can also be called a reserved channel resource threshold or a reserved channel threshold.
  • the resources related to the first service under the coverage of the RAN device may include one or more of channel resources or device resources.
  • Channel resources refer to air interface resources.
  • wireless interfaces usually use a combination of frequency division multiple access (FDMA) and time division multiple access (TDMA) technologies, so channel resources can usually be understood as time-frequency resources.
  • Device resources characterize the capabilities of RAN devices, including one or more of the storage resources or computing resources of RAN devices.
  • the first resource as a switching channel resource as an example, in a satellite communication system
  • the cell range illuminated by the satellite is fixed
  • the threshold of the first resource indicates the upper limit of the number of channel resources allowed to be reserved by the satellite
  • the reserved channel resources are only used for UE switching.
  • the channel resources of the satellite are divided into access channel resources and switching channel resources
  • channel resources 1 to K-1 are access channel resources
  • channel resources K to M are switching channel resources
  • the upper limit of the number of switching channel resources is the reserved channel threshold ⁇ , that is, the threshold of the first resource.
  • the satellite communication system uses a reserved channel strategy to ensure that the call is not interrupted when the UE moves from the current satellite service area to the new satellite service area.
  • the satellite obtains the UE's location information, movement direction, speed, access time and other information, estimates the time when the UE leaves the current satellite service area and the satellite service area to be accessed, and requests reserved channel resources for the UE in the channel resources of the satellite service area to be accessed through the intersatellite link.
  • the reserved channel resources are only for UE switching.
  • the reservation request is accepted; otherwise, the request is rejected.
  • the current satellite moves away from the first cell currently covered, it will cause a handover on the network side, and the UE needs to switch to establish a connection with the new satellite, and the reserved channel strategy can also be used to request reserved channel resources.
  • the resource management strategy of the embodiment of the present application takes the first information as input, is used to dynamically adjust the threshold of the first resource according to the first information, and outputs the adjusted first threshold.
  • the first RAN device determines the first threshold of the first resource according to the first information, it can determine the first adjustment factor according to the first information, and the first adjustment factor is used to adjust the second threshold, and the second threshold is the original threshold of the first resource of the first cell, and then the first threshold is determined according to the first adjustment factor and the second threshold.
  • the adjustment factor can also be called an adjustment amount, an adjustment value, or an adjustment parameter.
  • the first RAN device may determine the first adjustment factor according to a comparison result between the first parameter and the second parameter. If the comparison result indicates that the difference between the first parameter and the second parameter is greater than or equal to a first threshold, the first adjustment factor is zero. Alternatively, if the difference is less than the first threshold, the difference is determined to be the first adjustment factor.
  • the first resource as a switching channel resource as an example, if the first information includes a first parameter and a second parameter, namely, a switching success rate and an access success rate, when the switching success rate p switch is too small, it means that the demand for reserved channels is large, but the channel resources allowed to be reserved are small, so the threshold of the first resource should be increased.
  • the access success rate p access is too small, it means that the number of reserved channel resources is too large, thereby occupying too much access channel resources, so the threshold of the first resource should be reduced.
  • the difference value is used to characterize the degree of difference between the first parameter and the second parameter.
  • the difference value may be the difference between the first parameter and the second parameter.
  • the difference value may be determined based on the first parameter and the second parameter, such as the weighted difference between the first parameter and the second parameter.
  • the first threshold value can be set according to an abnormal situation.
  • a suitable first threshold value can be configured to avoid threshold adjustment in such sudden situations, that is, the first threshold value can be used to reduce the impact of sudden changes on threshold adjustment.
  • the first adjustment factor is zero and no adjustment is made to reduce the situation where the threshold setting is inaccurate due to sudden situations. For example, if the first threshold value is 1, then when the difference between the first parameter and the second parameter is less than 1, the difference is determined to be the first adjustment factor, and when the difference between the first parameter and the second parameter is greater than 1, the first adjustment factor is zero.
  • the first threshold of the first resource when the first RAN device determines the first threshold of the first resource according to the first capability parameter, the first threshold of the first resource may also be determined according to the first information and the first weight, where the first weight is the weight corresponding to the first wave position, and the first wave position is the wave position where the first cell is located.
  • the service area of the satellite network is divided into multiple small geographical areas according to geographical location, and each geographical area is called a wave position.
  • the wave position can be represented by different shapes.
  • the first cell can correspond to one or more wave positions.
  • the first resource as a switching channel resource as an example, if the first information includes a first parameter and a second parameter, namely, a switching success rate and an access success rate, when the switching success rate p switch is too small, it means that the demand for reserved channels is large, while the channel resources allowed for reservation are small, so the threshold of the first resource should be increased.
  • the access success rate p access is too small, it means that the number of reserved channel resources is too large, thereby occupying too many access channel resources, so the threshold of the first resource should be reduced.
  • the two parameters should be weighted and compared, and different weights can be configured for the first parameter and the second parameter.
  • the first weight includes a first sub-weight corresponding to the first parameter and a second sub-weight corresponding to the second parameter.
  • A is the second sub-weight
  • B is the first sub-weight
  • ⁇ is the first adjustment factor
  • the first RAN device determines the first threshold according to the first adjustment factor and the second threshold.
  • the formula indicates that the adjusted first threshold is the sum of the original second threshold and the product of the second threshold and the first adjustment factor.
  • FIG5 shows a flowchart of a resource management strategy.
  • Step 501 input the second threshold ⁇ old , the switching success rate p switch and the access success rate p access .
  • Step 502 Determine a target value of a first adjustment factor ⁇ according to the switching success rate p switch and the access success rate p access .
  • Step 503 Determine whether the absolute value of the target value is less than the first threshold value. If yes, execute step 504; if no, execute step 505.
  • Step 506 Output the adjusted first threshold.
  • the first RAN device may obtain the first weight corresponding to the first wave position through the following implementation methods:
  • the core network device may send the parameter table to the first RAN device in advance.
  • the parameter table may be included in the second information, that is, when notifying the first RAN device of the handover, the parameter table is sent to the first RAN device.
  • the parameter table may include a first weight corresponding to a first wave position, such as the aforementioned first sub-weight and second sub-weight.
  • the parameter table may include weights corresponding to multiple wave positions, and the multiple wave positions include the first wave position. That is to say, the core network device can send the parameter table containing all parameters to the RAN device in advance, and the RAN device can subsequently use the corresponding parameters to perform the resource management process according to the wave position number of its own service. Then the first RAN device can obtain the corresponding first weight from the parameter table according to the wave position number of the first wave position. See Table 1, which is an example of a parameter table, wherein the parameter table contains the values corresponding to the second sub-weight A and the first sub-weight B corresponding to different wave position identifiers (IDs).
  • IDs wave position identifiers
  • the core network device may only send the first weight of the first wave position to the second RAN device, and when switching, the second RAN device may send the first weight to the first RAN device.
  • the second RAN device may include the first weight in the third information and send it to the first RAN device.
  • the first weight may also be carried in other information and sent to the first RAN device, and there is no limitation to this.
  • the original covered RAN device can transmit the first information to the new RAN device, and the first information includes one or more of the second threshold, the first parameter or the second parameter of the first resource. Then the newly covered RAN device can determine whether the second threshold setting is reasonable through the aforementioned resource management strategy. If it is reasonable, the second threshold will continue to be used, that is, the new first threshold and the second threshold have the same value. Otherwise, the second threshold can be adjusted through the resource management strategy, that is, the new first threshold is the sum of the second threshold and the adjustment amount. In this way, after the RAN device switching occurs, the new RAN device can obtain the previous statistical data, so that the threshold setting is more accurate, so that the resource allocation is more in line with the current resource requirements, and the resource utilization rate is improved.
  • FIG6 shows a schematic flow chart of a communication method provided in an embodiment of the present application.
  • Step 601 The first RAN device sends fifth information to the UE. Correspondingly, the UE receives the fifth information.
  • the fifth information is used to configure the first resource
  • the first resource includes resources related to the first service for the UE when the UE is covered by the first RAN device, the number of the first resources is less than or equal to the first threshold, the first threshold is used to indicate the upper limit of the number of the first resources in the first cell, and the first threshold is determined according to the first information.
  • the determination process of the first threshold can refer to the introduction in the embodiment shown in Figure 3 or Figure 5, and will not be repeated here.
  • the first RAN device can configure the first resource for the UE for switching use.
  • the first RAN device may send the fifth information to the UE via the original RAN device of the UE (eg, the second RAN device).
  • FIG6 specifically takes the first RAN device as an example, but in actual scenarios, the method is also applicable to other RAN devices covering the first cell, such as the second RAN device.
  • the communication method provided in the embodiment of the present application is introduced mainly by taking the RAN device as a satellite and the core network device as an AMF as an example. See Figure 7, which is a flow chart of an inter-satellite switching process.
  • the first RAN device is the first S-gNB
  • the second RAN device is the second S-gNB
  • the core network device is the AMF as an example.
  • the satellite involved in the inter-satellite switching process can operate in a staring mode to increase the length of time the satellite provides services to the UE.
  • the RAN device is other removable devices or operates in other modes, the following switching process or its adaptive variants can also be used.
  • Step 701 AMF determines that the first cell is covered by the first S-gNB.
  • the AMF may record the relevant information of each S-gNB to determine whether the S-gNB needs to be switched, and determine the time when the switch occurs and the S-gNBs involved in the switch based on the relevant information of each S-gNB.
  • the relevant information of each S-gNB may include one or more of the cell currently covered by the S-gNB, the duration of the S-gNB covering the cell, or the motion law information of the S-gNB.
  • the motion law information can be described by the satellite ephemeris.
  • the AMF determines that the second S-gNB will not be able to cover the first cell, or the coverage quality of the second S-gNB is poor when it continues to cover the first cell, based on the duration of the second S-gNB covering the first cell or the movement law information of the second S-gNB. In this case, the AMF determines to switch the S-gNB for the first cell and can determine the new S-gNB for the first cell, namely, the first S-gNB.
  • the second S-gNB may determine that it will not be able to cover the first cell, or that the coverage quality when it continues to cover the first cell is poor. Then the second S-gNB determines that the first cell will perform S-gNB switching, and the second S-gNB may send an indication message to the AMF, which indicates that the first cell needs to perform S-gNB switching. After the AMF receives the indication message, it can determine the new S-gNB for the first cell, that is, the first S-gNB. Alternatively, the indication message may also include the new S-gNB determined by the second S-gNB, and the AMF may determine the new S-gNB for the first cell based on the indication message.
  • Step 702 The AMF sends the second information to the first S-gNB.
  • the first S-gNB receives the second information.
  • the second information includes information for indicating that the first S-gNB covers the first cell, which can also be described as handover information, that is, the handover information is used to indicate that the S-gNB covering the first cell is switched from the second S-gNB to the first S-gNB.
  • the second information can be handover signaling, or the second information is included in the handover signaling, which can also be described as a handover message or a handover request, etc.
  • the AMF may send second information to the first S-gNB via a control channel link, where the second information may include an identifier of the first S-gNB, an identifier of the AMF, and a requested switching time.
  • the second information may also be described as an S-gNB switching request or a satellite switching request, or the second information is included in the S-gNB switching request or the satellite switching request.
  • the AMF may send information to the first S-gNB via an NG interface.
  • the second information further includes first information of the first cell, and the first information includes one or more of a second threshold of the first resource, a first parameter, or a second parameter.
  • the second information further includes a first weight corresponding to a first wavelength, where the first wavelength is a wavelength where the first cell is located.
  • the first weight is used to adjust a first threshold of a first resource of the first cell.
  • the AMF may adopt any of the following implementation methods:
  • the first information can be determined by the S-gNB, and the S-gNB reports the determined first information to the AMF.
  • the satellite can send the first information of the currently covered cell to the AMF in real time, and the AMF will record and store it uniformly.
  • the AMF determines the resource management method parameters based on the above collected information while making a switching decision, and sends it to the corresponding satellite, that is, the AMF can include the first information in the second information and send it to the switched satellite.
  • the S-gNB may report the original data used to calculate the first information to the AMF, and the first information may be determined by the AMF based on the original data.
  • the AMF when the AMF determines to switch the S-gNB, it can obtain the first information from the currently covered S-gNB. For example, the AMF sends an information acquisition request to the S-gNB to obtain the first information returned by the S-gNB.
  • Step 703 The first S-GNB feeds back first response information to the AMF.
  • the AMF receives the first response information.
  • the first S-GNB may determine the switching time allowed by itself according to its current information, and include the switching time allowed by itself in the first response information and return it to the AMF. For example, the first S-GNB may determine the appropriate switching time according to its own resources and business conditions.
  • the AMF After receiving the first response information, the AMF records the allowed switching time of the first S-GNB and prepares to switch the S-gNB of the first cell.
  • Step 704 The AMF sends a first handover signaling to the first S-gNB.
  • the first S-gNB receives the first handover signaling.
  • the first switching signaling includes the identifier of the original S-gNB, that is, the second S-gNB.
  • Step 705 The AMF sends a second handover signaling to the second S-gNB.
  • the second S-gNB receives the second handover signaling.
  • the second switching signaling includes the identifier of the new S-gNB, namely the first S-gNB.
  • the second switching signaling may include fourth information, the fourth information indicating that the first S-gNB covers the first cell, and the second S-gNB determines that the first S-gNB covers the first cell according to the fourth information.
  • fourth information may also be carried in other messages or signaling, which is not limited.
  • Step 706 After receiving the second switching signaling, the second S-gNB sends the third information to the first S-gNB. Correspondingly, the first S-gNB receives the third information.
  • the third information is used to configure the transmit beam and/or receive beam of the first cell.
  • the third information includes beam configuration information of the first cell, and the beam configuration information includes, for example, one or more of the position, power, frequency or bandwidth of each beam.
  • the third information further includes first information of the first cell, and the first information includes one or more of the second threshold of the first resource, the first parameter, or the second parameter.
  • the third information further includes a first weight corresponding to a first wavelength, where the first wavelength is a wavelength where the first cell is located.
  • the first weight is used to adjust a first threshold of a first resource of the first cell.
  • the second S-gNB may send third information to the first S-gNB via the Xn interface.
  • the method of including the first information through the second information in step 702 and the method of including the first information through the third information in step 706 can be implemented either one or at the same time.
  • Step 707 After receiving the third information, the first S-gNB may record the beam configuration indicated by the third information, or the transmit beam and/or receive beam of the first cell according to the third information. After completion, the first S-gNB sends a second response message to the second S-gNB, and the second response message is used to notify that the configuration has been recorded or completed. Correspondingly, the second S-gNB receives the second response message.
  • Step 708 After receiving the second response information, the second S-gNB sends a synchronization request to the first S-gNB.
  • the first S-gNB receives the synchronization request.
  • the synchronization request is used to instruct the first S-gNB to synchronize with the UE in the first cell.
  • Step 709 The first S-gNB sends a third response message to the second S-gNB.
  • the second S-gNB receives the third response message.
  • the third response message includes response information for the synchronization request.
  • the first S-gNB performs synchronization measurement with the UE according to the synchronization request, for example, including measuring time and frequency offset errors with the UE.
  • the first S-gNB sends a third response message to the second S-gNB according to the measurement result, and the measurement result includes the synchronization data of the first S-gNB itself.
  • the synchronization between S-gNB and UE can include two processes: synchronization and access (here it refers to accessing S-gNB, that is, establishing a communication connection with S-gNB). After S-gNB and UE perform synchronization, it will determine whether the UE is accessed and send the information to the second S-gNB.
  • Step 710 The second S-gNB notifies the first S-gNB that the switching is complete.
  • Step 711 The second S-gNB notifies the UE that the switching is complete.
  • the second S-gNB After the second S-gNB receives the third response information, if it is determined based on the third response information that the first S-gNB has completed synchronization with most UEs, it notifies the first S-gNB and UE of the switching information.
  • the first S-gNB uses the beam configuration of the second S-gNB and controls the antenna to illuminate the first cell, provides services for the first cell, and records relevant entries.
  • the second S-gNB deletes relevant entries and releases resources. For example, the second S-gNB deletes beam configuration information and UE connection information.
  • the UE deletes relevant entries and updates the access satellite number to the first S-gNB. The handover is now complete.
  • these UEs adjust the time and frequency again and resend the synchronization information, for example, the UE re-initiates access. If synchronization is still not possible after multiple retransmissions, the UE resends the acquisition request after waiting for several time slots, and the acquisition request can also be replaced by an access request.
  • the second information in step 702 may include the first information
  • the third information in step 707 may include the first information
  • the first information includes one or more of the second threshold, the first parameter or the second parameter of the first resource.
  • the first S-gNB can determine whether the second threshold setting is reasonable based on the first information combined with the aforementioned resource management strategy. If it is reasonable, the second threshold will continue to be used, that is, the new first threshold and the second threshold have the same value. Otherwise, the second threshold can be adjusted through the resource management strategy, that is, the new first threshold is the sum of the second threshold and the adjustment amount.
  • the first S-gNB can also calculate the first information in the first cell when it is covered by itself, and dynamically adjust the threshold of the first resource based on the first information combined with the aforementioned resource management strategy, so that the threshold can be set according to the actual resource demand, which can reduce the waste of resources caused by unreasonable resource threshold setting, improve resource utilization, and reduce the failure of services (or service switching) caused by insufficient first resources, thereby improving the quality of communication services.
  • the first resource is a handover channel resource
  • the threshold of the first resource is a reserved channel threshold
  • the first parameter is a handover success rate
  • the second parameter is an access success rate.
  • the first S-gNB can calculate the access success rate, handover success rate, and reserved channel threshold of the UE under the staring cell at the current moment.
  • the reservation request is accepted; otherwise, the request is rejected.
  • the adjustment target parameter of the reserved channel threshold is calculated according to the access success rate and the handover success rate, and the reserved channel threshold is adjusted according to the value of the adjustment target parameter.
  • the handover success rate is too small, it means that the demand for reserved channels is large, while the number of channels allowed to be reserved is small, and the reserved channel threshold should be increased; when the access success rate is too small, it means that the number of reserved channel resources is too large, thereby occupying too much access channel resources, and the reserved channel threshold should be reduced.
  • the original coverage satellite can pass the reserved channel threshold, handover success rate, and access success rate of the current coverage cell to the new coverage satellite, and the new coverage satellite continues to execute the channel resource management strategy based on this information.
  • FIG 8 shows a schematic diagram of the structure of a communication device provided in an embodiment of the present application.
  • the communication device 800 may be a circuit system of the RAN device (or S-gNB) described in the embodiment shown in Figures 3, 5 or 7, and is used to implement the method corresponding to the RAN device (or S-gNB) in the above method embodiment, for example, the RAN device is a first RAN device or a second RAN device.
  • the communication device 800 may be a circuit system of the core network device (or AMF) described in the embodiment shown in Figures 3, 5 or 7, and is used to implement the method corresponding to the core network device (or AMF) in the above method embodiment.
  • a circuit system is a chip system.
  • the communication device 800 includes at least one processor 801.
  • the processor 801 can be used for internal processing of the device to implement certain control processing functions.
  • the processor 801 includes instructions.
  • the processor 801 can store data.
  • different processors can be independent devices, can be located in different physical locations, and can be located on different integrated circuits.
  • different processors can be integrated into one or more processors, for example, integrated on one or more integrated circuits.
  • the communication device 800 includes one or more memories 803 for storing instructions.
  • data may also be stored in the memory 803.
  • the processor and the memory may be provided separately or integrated together.
  • the communication device 800 includes a communication line 802 and at least one communication interface 804. Since the memory 803, the communication line 802 and the communication interface 804 are all optional, they are all indicated by dotted lines in FIG. 8 .
  • the communication device 800 may further include a transceiver and/or an antenna.
  • the transceiver may be used to send information to other devices or receive information from other devices.
  • the transceiver may be referred to as a transceiver, a transceiver circuit, an input/output interface, etc., and is used to implement the transceiver function of the communication device 800 through an antenna.
  • the transceiver includes a transmitter and a receiver.
  • the transmitter may be used to generate a radio frequency signal from a baseband signal
  • the receiver may be used to convert the radio frequency signal into a baseband signal.
  • Processor 801 may include a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the communication link 802 may include a pathway to transmit information between the above-mentioned components.
  • the communication interface 804 uses any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), wired access networks, etc.
  • RAN radio access network
  • WLAN wireless local area networks
  • wired access networks etc.
  • the memory 803 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the memory 803 may exist independently and be connected to the processor 801 through the communication line 802. Alternatively, the memory 803 may also be integrated with the processor 801.
  • the memory 803 is used to store computer execution instructions for executing the solution of the present application, and the execution is controlled by the processor 801.
  • the processor 801 is used to execute the computer execution instructions stored in the memory 803, so as to implement the steps performed by the core network device (or AMF) or RAN device (or S-gNB) described in the embodiments shown in Figures 3, 5 or 7.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.
  • the processor 801 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 8 .
  • the communication device 800 may include multiple processors, such as the processor 801 and the processor 805 in FIG8 .
  • processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).
  • the chip When the device shown in FIG8 is a chip, such as a chip of a UE or a chip of a network device, the chip includes a processor 801 (may also include a processor 805), a communication line 802 and a communication interface 804, and optionally, may include a memory 803.
  • the communication interface 804 may be an input interface, a pin or a circuit, etc.
  • the memory 803 may be a register, a cache, etc.
  • the processor 801 and the processor 805 may be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the communication method of any of the above embodiments.
  • the embodiment of the present application may divide the functional modules of the device according to the above method example.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above integrated module may be implemented in the form of hardware or in the form of software functional modules.
  • the division of modules in the embodiment of the present application is schematic, which is only a logical function division, and there may be other division methods in actual implementation.
  • Figure 9 is a schematic diagram of a device, and the device 900 may be the UE or network device involved in the above method embodiments, or a chip in the UE or a chip in the network device.
  • the device 900 includes a processing unit 902 and a transceiver unit 901.
  • the device 900 can be used to implement the steps performed by the UE or network device in the communication method of the embodiment of the present application.
  • the relevant features can refer to the embodiments shown in Figures 3, 5 or 7 above, and will not be repeated here.
  • the functions/implementation processes of the transceiver unit 901 and the processing unit 902 in FIG. 9 may be implemented by the processor 801 in FIG. 8 calling a computer-executable instruction stored in the memory 803.
  • the functions/implementation processes of the processing unit 902 in FIG. 9 may be implemented by the processor 801 in FIG. 8 calling a computer-executable instruction stored in the memory 803, and the functions/implementation processes of the transceiver unit 901 in FIG. 9 may be implemented by the communication interface 804 in FIG. 8.
  • the function/implementation process of the transceiver unit 901 can also be implemented by a pin or a circuit.
  • the transceiver unit 901 may include a sending unit and/or a receiving unit, the sending unit is used to implement the sending function, and the receiving unit is used to implement the receiving function; or, the transceiver unit 901 may be an integral module that can implement the sending function and/or the receiving function.
  • the transceiver unit 901 may be implemented by a transceiver.
  • the present application also provides a computer-readable storage medium, which stores a computer program or instruction.
  • the method performed by the core network device (or AMF) or RAN device (or S-gNB) in the aforementioned method embodiment is implemented.
  • the functions described in the above embodiments can be implemented in the form of software functional units and sold or used as independent products.
  • the technical solution of the present application can be essentially or partly embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.
  • Storage media include: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.
  • the present application also provides a computer program product, which includes: a computer program code, which, when executed on a computer, enables the computer to execute the method performed by the core network device (or AMF) or the RAN device (or S-gNB) in any of the aforementioned method embodiments.
  • a computer program product which includes: a computer program code, which, when executed on a computer, enables the computer to execute the method performed by the core network device (or AMF) or the RAN device (or S-gNB) in any of the aforementioned method embodiments.
  • An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is used to execute the method performed by the core network device (or AMF) or RAN device (or S-gNB) involved in any of the above method embodiments.
  • the core network device or AMF
  • RAN device or S-gNB
  • the computer program product includes one or more computer instructions.
  • the process or function described in the embodiment of the present application is generated in whole or in part.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.
  • the computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, data center, etc. that contains one or more available media integrated.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.
  • a magnetic medium e.g., a floppy disk, a hard disk, a magnetic tape
  • an optical medium e.g., a DVD
  • a semiconductor medium e.g., a solid state disk (SSD)
  • the various illustrative logic units and circuits described in the embodiments of the present application can be implemented or operated by a general-purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above.
  • the general-purpose processor can be a microprocessor, and optionally, the general-purpose processor can also be any conventional processor, controller, microcontroller or state machine.
  • the processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration.
  • the steps of the method or algorithm described in the embodiments of the present application can be directly embedded in hardware, a software unit executed by a processor, or a combination of the two.
  • the software unit can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (EPROM), EEPROM, registers, hard disks, removable disks, CD-ROMs, or other storage media in any form in the art.
  • the storage medium can be connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium can also be integrated into the processor.
  • the processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a terminal device.
  • the processor and the storage medium can also be arranged in different components in the terminal device.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.
  • the UE and/or the network device may perform some or all of the steps in the embodiment of the present application, and these steps or operations are only examples. In the embodiment of the present application, other operations or variations of various operations may also be performed. In addition, the various steps may be performed in different orders presented in the embodiment of the present application, and it is possible that not all operations in the embodiment of the present application need to be performed.

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Abstract

La présente demande concerne un procédé et un appareil de communication, ainsi qu'un système. Dans le procédé, des premières informations représentent le taux de réussite d'un appareil terminal qui est associé à un premier service lorsque l'appareil terminal est couvert par un premier appareil de réseau d'accès ou un second appareil de réseau d'accès, et le taux de réussite d'exécution du premier service reflète dans une certaine mesure la demande de ressources pour exécuter le premier service. Par conséquent, le premier appareil de réseau d'accès peut ajuster un premier seuil de premières ressources sur la base du taux de réussite, de façon à amener le premier seuil à satisfaire les demandes d'une première cellule actuelle pour les premières ressources. Par comparaison avec un procédé de réglage d'un seuil de ressource fixe, le procédé dans les modes de réalisation de la présente demande peut régler un seuil sur la base de demandes de ressources réelles, de telle sorte que les échecs d'établissement de connexion provoqués par l'insuffisance des premières ressources sont réduits, ce qui permet l'amélioration de la qualité de communication de service, et le gaspillage de ressources provoqué par un réglage de seuil de ressource irrationnel peut également être réduit, de façon à améliorer un taux d'utilisation de ressources.
PCT/CN2024/136773 2023-12-29 2024-12-04 Procédé et appareil de communication, et système Pending WO2025139660A1 (fr)

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CN111200847A (zh) * 2018-11-16 2020-05-26 华为技术有限公司 通信方法及装置
WO2021056561A1 (fr) * 2019-09-29 2021-04-01 Oppo广东移动通信有限公司 Dispositif et procédé de commutation de cellules
WO2022056707A1 (fr) * 2020-09-16 2022-03-24 华为技术有限公司 Procédé de sélection de réseau et de communication, et appareil de communication
WO2022077375A1 (fr) * 2020-10-15 2022-04-21 华为技术有限公司 Procédé et appareil de communication
US20230361859A1 (en) * 2022-05-09 2023-11-09 Ast & Science, Llc On-demand resource management satellite communication system and method

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Publication number Priority date Publication date Assignee Title
CN111200847A (zh) * 2018-11-16 2020-05-26 华为技术有限公司 通信方法及装置
WO2021056561A1 (fr) * 2019-09-29 2021-04-01 Oppo广东移动通信有限公司 Dispositif et procédé de commutation de cellules
WO2022056707A1 (fr) * 2020-09-16 2022-03-24 华为技术有限公司 Procédé de sélection de réseau et de communication, et appareil de communication
WO2022077375A1 (fr) * 2020-10-15 2022-04-21 华为技术有限公司 Procédé et appareil de communication
US20230361859A1 (en) * 2022-05-09 2023-11-09 Ast & Science, Llc On-demand resource management satellite communication system and method

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