WO2022165752A1 - 状态转换方法、装置、设备及存储介质 - Google Patents

状态转换方法、装置、设备及存储介质 Download PDF

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Publication number
WO2022165752A1
WO2022165752A1 PCT/CN2021/075519 CN2021075519W WO2022165752A1 WO 2022165752 A1 WO2022165752 A1 WO 2022165752A1 CN 2021075519 W CN2021075519 W CN 2021075519W WO 2022165752 A1 WO2022165752 A1 WO 2022165752A1
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WO
WIPO (PCT)
Prior art keywords
access network
relay terminal
network device
connection
state
Prior art date
Application number
PCT/CN2021/075519
Other languages
English (en)
French (fr)
Inventor
郭雅莉
卢前溪
杨皓睿
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2021/075519 priority Critical patent/WO2022165752A1/zh
Priority to CN202311333646.7A priority patent/CN117222054A/zh
Priority to EP21923769.0A priority patent/EP4243509A4/en
Priority to CN202180075025.6A priority patent/CN116349402A/zh
Priority to JP2023540609A priority patent/JP2024510071A/ja
Priority to KR1020237021778A priority patent/KR20230140558A/ko
Publication of WO2022165752A1 publication Critical patent/WO2022165752A1/zh
Priority to US18/206,199 priority patent/US11997743B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of mobile communications, and in particular, to a state transition method, apparatus, device, and storage medium.
  • Any terminal can use another terminal as a medium to connect to the core network to communicate with the core network.
  • the communication terminal establishes a connection with the relay terminal, and the relay terminal establishes a connection with the core network to which the relay terminal belongs through the access network equipment.
  • the relay terminal is converted into a CM ( Connection Management, connection management)-connected (connected) state.
  • the communication terminal is connected to the access network device by using the relay terminal as the medium, and then connected to the core network to which the communication terminal belongs through the access network device. communication.
  • the communication terminal does not need to communicate anymore, it will switch to the CM-idle (idle) state or the radio resource control inactive state, while the state of the relay terminal remains unchanged and remains in the CM-connected state, resulting in the resources of the relay terminal being in the CM-connected state. In a consumption state, resource utilization is low.
  • Embodiments of the present application provide a state transition method, apparatus, device, and storage medium, which prevent the relay terminal from being still in the connection state of the access network device when the communication terminal connected to the access network device through the relay terminal leaves the connection state of the access network device.
  • the connection state with the access network device saves the resource consumption of the relay terminal, thereby improving the communication quality of the relay terminal.
  • a state transition method is provided, which is applied to an access network device, a relay terminal is connected to the access network device, and the relay terminal is connected to at least one communication terminal, and the communication The terminal is connected to the access network device through the relay terminal, and the method includes:
  • a state transition method is provided, which is applied to a relay terminal, the relay terminal is connected to an access network device, and the relay terminal is connected to at least one communication terminal, and the communication terminal Connecting to the access network device through the relay terminal, the method includes:
  • the first control message is determined by the access network device when all communication terminals connected to the access network device through the relay terminal leave Sent in the case of the connection state of the access network device;
  • a state transition apparatus which is applied to an access network device, a relay terminal is connected to the access network device, and the relay terminal is connected to at least one communication terminal, and the communication The terminal is connected to the access network device through the relay terminal, and the apparatus includes:
  • control module configured to control the at least one communication terminal to leave the connection state with the access network device
  • a sending module configured to send a first control to the relay terminal when it is determined that all communication terminals connected to the access network device through the relay terminal leave the connection state with the access network device message, the first control message is used to instruct the relay terminal to leave the connection state with the access network device.
  • a state transition apparatus which is applied to a relay terminal, the relay terminal is connected to an access network device, and the relay terminal is connected to at least one communication terminal, and the communication The terminal is connected to the access network device through the relay terminal, and the apparatus includes:
  • control module configured to control the at least one communication terminal to leave the connection state with the access network device
  • a sending module configured to send a first control to the relay terminal when it is determined that all communication terminals connected to the access network device through the relay terminal leave the connection state with the access network device message, the first control message is used to instruct the relay terminal to leave the connection state with the access network device.
  • an access network device comprising: a processor; a transceiver connected to the processor; a transceiver for storing executable program codes of the processor a memory; wherein the processor is configured to load and execute the executable program code to implement the state transition method according to the above aspect.
  • a relay terminal comprising: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein , the processor is configured to load and execute the executable instructions to implement the state transition method as described in the above aspects.
  • a computer-readable storage medium is provided, and executable program code is stored in the readable storage medium, and the executable program code is loaded and executed by the processor to implement the above-mentioned aspect The described state transition method.
  • a chip includes a programmable logic circuit and/or program instructions, and when the chip runs on an access network device or a relay terminal, it is used to implement the above aspect The described state transition method.
  • an embodiment of the present application provides a computer program product, which is used to implement the state described in the above aspect when the computer program product is executed by a processor of an access network device or a relay terminal conversion method.
  • the access network device can control the relay terminal to leave the connection state when it is determined that at least one communication terminal connected to the relay terminal has left the connection state with the access network device.
  • the connection state with the access network device prevents the relay terminal from being still in the connection state with the access network device when the communication terminal connected to the access network device through the relay terminal leaves the connection state of the access network device , the resource consumption of the relay terminal is saved, and the communication quality of the relay terminal is improved.
  • FIG. 1 shows a schematic structural diagram of a network structure provided by an exemplary embodiment of the present application.
  • FIG. 2 shows a block diagram of a communication terminal performing communication through a relay terminal according to an exemplary embodiment of the present application.
  • FIG. 3 shows a block diagram of a communication system provided by an exemplary embodiment of the present application.
  • FIG. 4 shows a flowchart of a communication method provided by an exemplary embodiment of the present application.
  • FIG. 5 shows a flowchart of a state transition method provided by an exemplary embodiment of the present application.
  • FIG. 6 shows a flowchart of a state transition method provided by an exemplary embodiment of the present application.
  • FIG. 7 shows a flowchart of a state transition method provided by an exemplary embodiment of the present application.
  • FIG. 8 shows a block diagram of a state transition apparatus provided by an exemplary embodiment of the present application.
  • FIG. 9 shows a block diagram of a state transition apparatus provided by another exemplary embodiment of the present application.
  • FIG. 10 shows a block diagram of a state transition apparatus provided by an exemplary embodiment of the present application.
  • FIG. 11 shows a block diagram of a state transition apparatus provided by another exemplary embodiment of the present application.
  • FIG. 12 shows a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.
  • the network system architecture includes a terminal, an access network, a UPF (User Plane Function, user plane function) network element, an external data network, AMFAccess Management Function, access management function) network element, SMF (Session Management Function, session management function) network element, PCF (Policy Control function, policy control function) network element, AF (Application Function, application layer function) network element, NSSF (Network SliceSelection Function, network slice selection function) network element, AUSF (Authentication Server Function, authentication service function) network element and UDM (Unified Data Management, unified data management function) network element, the terminal through Uu (a communication interface) The interface is connected with the access network at the access layer, and then the access layer messages and wireless data transmission are exchanged.
  • UPF User Plane Function, user plane function
  • SMF Session Management Function, session management function
  • PCF Policy Control function, policy control function
  • AF Application Function, application layer function
  • NSSF Network SliceSelection Function, network slice selection function
  • AUSF
  • the AMF network element has the mobility management function in the core network, and the SMF has the session management function in the core network. In addition to the mobility management of the terminal, the AMF network element is also responsible for sending session management messages from the terminal to the SMF network. forwarding between elements, and the AMF network element exchanges data with the SMF network element through the N11 (a communication interface) interface.
  • the PCF network element has a policy management function in the core network, and is responsible for formulating policies related to the mobility management, session management, and charging of the terminal, and exchanges data with the SMF network element through the N7 (a communication interface) interface. The PCF network element exchanges data with the AMF through the N15 (a communication interface) interface.
  • the UPF network element has the user plane function in the core network, and performs data transmission with the external data network through the N6 (a communication interface) interface, and performs data transmission with the access network through the N3 (a communication interface) interface.
  • a PDU session is established for data transmission under the control of the SMF network element.
  • the NSSF network element exchanges data with the AMF network element through the N22 (a communication interface) interface.
  • the AUSF network element exchanges data with the AMF network element through the N12 (a communication interface) interface, and exchanges data with the UDM network element through the N13 (a communication interface) interface.
  • the UDM network element performs data interaction with the AMF network element through the N8 (a communication interface) interface, and performs data interaction with the SMF network element through the N10 (a communication interface) interface.
  • connection management states between the terminal that has been registered to the network and the AMF There are two connection management states between the terminal that has been registered to the network and the AMF: idle state or connected state. If the connection between the terminal and the access network device is established, the access network device establishes a connection with the AMF, so that the terminal can exchange NAS messages with the AMF. At this time, the terminal is in the CM-connected state, and the AMF also marks the state of the terminal as CM-connected state. If the connection between the terminal and the access network device is released, the terminal enters the CM-idle state, the connection between the access network device and the AMF is also released, and the AMF also marks the state of the terminal as the CM-idle state.
  • the connection between the terminal and the access network device is suspended, and the terminal is in the inactive state of the wireless connection in the CM-connected state, the connection between the access network device and the AMF continues to be maintained, and the AMF still marks the UE state as CM -connected state.
  • the relay terminal and the communication terminal are terminals with Prose (Proximity Services, close-range service) capability, and the relay terminal and the communication terminal can establish a connection and communicate through the PC5 interface .
  • the relay terminal can not only connect to the access network equipment through the mobile communication network, but also can be used as a relay (relay) terminal.
  • the relay terminal uses the Uu
  • the interface establishes a connection with the access network device, and then the communication terminal uses the relay terminal as the medium to connect with the access network device, and then conducts data interaction with the core network to which the communication terminal belongs.
  • the interface exchanges messages with the access layer.
  • FIG. 3 shows a block diagram of a communication system provided by an exemplary embodiment of the present application.
  • the communication system may include: an access network 12 , a relay terminal 13 and a communication terminal 14 .
  • the access network 12 includes several network devices 120 .
  • the network device 120 may be a base station, which is a device deployed in an access network to provide a wireless communication function for a terminal.
  • the base station may include various forms of macro base station, micro base station, relay station, access point and so on.
  • the names of devices with base station functions may be different.
  • eNodeBs or eNBs In LTE systems, they are called eNodeBs or eNBs; in 5G NR-U systems, they are called gNodeBs or gNBs.
  • the description of "base station” may change.
  • the above-mentioned apparatuses for providing wireless communication functions for the relay terminal 13 are collectively referred to as access network equipment.
  • Relay terminal 13, communication terminal 14 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems with wireless communication capabilities, as well as various forms of user equipment, mobile stations (Mobile Station, MS), terminal (terminal device) and so on.
  • the access network device 120 and the relay terminal 13 communicate with each other through a certain air interface technology, such as a Uu interface, and the relay terminal 13 and the communication terminal 14 are connected through short-range communication.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • LTE-A Advanced long term evolution
  • NR New Radio
  • evolution systems of NR systems LTE on unlicensed frequency bands (LTE-based access to unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • LTE-A Long term evolution
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to Everything
  • FIG. 4 shows a flowchart of a communication method provided by an exemplary embodiment of the present application, which is applied to the communication terminal, relay terminal, and access network device described in FIG. 1 , and the method includes the following contents: At least part of it:
  • the communication terminal establishes a connection with the relay terminal.
  • both the communication terminal and the relay terminal have short-range communication capabilities. If the communication terminal and the relay terminal are located within the short-range communication range, the communication terminal and the relay terminal establish a short-range communication connection.
  • the relay terminal has a short-range communication capability, and continuously sends a broadcast message, where the broadcast message is used to indicate that the relay terminal can provide a relay service for other terminals to connect to.
  • the communication terminal needs to perform data transmission, but the communication terminal cannot currently connect to the access network device, and scans and obtains the broadcast message sent by the relay terminal, the communication terminal sends a connection request message to the relay terminal, and the relay terminal based on the The connection request message establishes a short-range communication connection with the communication terminal.
  • the communication terminal establishes a short-range communication connection with the relay terminal through a PC5 (a kind of communication interface) interface.
  • the relay terminal establishes a connection with the access network device, and establishes a connection with the core network to which the relay terminal belongs through the connection with the access network device.
  • the communication terminal can trigger the establishment of a connection between the relay terminal and the access network device, and then establish a connection with the access network device based on the connection between the relay terminal and the access network device.
  • the relay terminal is located in the broadcast range of the access network device, and the relay terminal has established a short-range communication connection with the communication terminal, the relay terminal sends a connection establishment request to the access network device, and then the access network device establishes a connection based on the connection. Request to establish a connection with the relay terminal. Moreover, after the relay terminal establishes the connection with the access network device, the relay terminal can also establish a connection with the core network to which the relay terminal belongs through the connection with the access network device.
  • the core network is an AMF network element, or other network elements, which are not limited in the embodiments of the present application.
  • the relay terminal After the relay terminal establishes a connection with the core network to which the relay terminal belongs, the relay terminal enters the CM-connected state.
  • the relay terminal performs NAS message interaction with the core network to which the relay terminal belongs through the connected access network device.
  • the communication terminal establishes a connection with the access network device through the relay terminal.
  • the relay terminal can perform the forwarding service, and the communication terminal establishes and accesses the communication terminal through the short-range communication connection with the relay terminal. connections between network devices.
  • the relay device is a forwarding device. After receiving the communication message sent by the communication terminal, the relay terminal directly sends the communication message to the connected access network device. In fact, the relay terminal is used for transparent transmission. equipment, and the connection between the communication terminal and the access network equipment is realized by using the relay terminal as a medium.
  • 401 is executed before 402-403, and 402-403 is executed before step 404 as an example for description.
  • 401 can also be executed after 402-403, and 404 can be executed before 402-403, or can also be executed in other order.
  • the present application does not limit the sequential execution of 401, 402-403, and 404. order.
  • the communication terminal performs NAS message interaction with the core network to which the communication terminal belongs through the connected access network device.
  • the communication terminal after the communication terminal is connected to the access network device through the relay terminal, the communication terminal can establish a connection with the core network to which the communication terminal belongs based on the connection with the access network device, and then communicate with The terminal can perform NAS message interaction with the core network to which the communication terminal belongs.
  • the core network to which the communication terminal belongs is an AMF network element, or other network elements, which are not limited in this embodiment of the present application.
  • the relay terminal After the relay terminal establishes a connection with the core network to which the relay terminal belongs, the relay terminal enters the CM-connected state.
  • the relay terminal is used as a medium, so that the communication terminal is connected to the access network device by connecting with the relay terminal, and then the communication terminal is connected with the access network device based on the connection with the access network device.
  • the core network performs NAS message exchange, and the relay terminal expands the coverage of the access network equipment, and improves the efficiency of the communication between the communication terminal and the access network equipment to realize communication.
  • FIG. 4 shows a process in which a communication terminal establishes a connection with a core network to which the communication terminal belongs through a relay terminal, thereby implementing communication.
  • the communication terminal may leave the connection state with the access network device, and the access network device will control the state of the relay terminal based on the state of the communication terminal.
  • FIG. 5 shows a flowchart of a state transition method provided by an exemplary embodiment of the present application, which is applied to a communication terminal, a relay terminal, and an access network device as shown in FIG. 1 , wherein the relay terminal and the The access network equipment is connected, and the relay terminal is connected with at least one communication terminal, and the communication terminal is connected with the access network equipment through the relay terminal, and the method includes at least part of the following contents:
  • the access network device controls at least one communication terminal to leave a connection state with the access network device.
  • the access network device is connected to at least one communication terminal, and each communication terminal can communicate with the core network to which the communication terminal belongs based on the access network device.
  • the communication terminal needs to leave the connection state with the access network device, and the access network device controls the communication terminal to leave the connection state with the access network device.
  • the communication terminal is currently in a connection state with the access network device, and the connection state is a CM-connected state.
  • the communication terminal leaves the connection state with the access network device, including two cases: the first is that the communication terminal releases the wireless connection with the access network device and transitions to the CM-idle state.
  • the second type is that the communication terminal suspends the wireless connection with the access network device, and switches to the inactive state of the radio resource control.
  • the access network device sends a second wireless connection release message to at least one communication terminal.
  • the second wireless connection release message is used to instruct the communication terminal to transition to the CM-idle state.
  • the access network device Since the access network device needs to control at least one connected communication terminal to leave the connection state with the access network device, the access network device sends a second wireless connection release message to the at least one communication terminal, and the communication terminal receives the access network device After the second wireless connection release message is sent, it is converted to the CM-idle state based on the second wireless connection release message, and the communication terminal no longer communicates with the access network device at this time.
  • the second radio connection suspension message is used to instruct the communication terminal to switch to the radio resource control inactive state.
  • the access network device needs to control at least one connected communication terminal to leave the connection state with the access network device, the access network device sends a second wireless connection suspension message to the at least one communication terminal, and the communication terminal receives the access network device. After the second wireless connection suspending message sent by the device, based on the second wireless connection releasing message, it is converted to the radio resource control inactive state, and at this time, the communication terminal no longer communicates with the access network device.
  • the embodiments of the present application are described by taking the relay terminal and the access network device in a connected state as an example for description.
  • the relay terminal needs to connect with the access network device first, the relay terminal determines that it needs to establish a connection with the access network device through the wireless connection with the communication terminal, and sends the connection to the access network device
  • the access network device accesses the connection establishment request sent by the relay terminal through the connection with the communication terminal, and then establishes a wireless connection with the relay terminal.
  • the access network device sends a first control message to the relay terminal.
  • the first control message is used to instruct the relay terminal to leave the connection state with the access network device.
  • the access network device since the access network device controls at least one communication terminal connected to the access network device to leave the connection state with the access network device, and the access network device also records the connection to the connection through the relay terminal
  • the access network device For a communication terminal of a network access device, if, for a relay terminal, all communication terminals with the access network device are separated from the connection state with the access network device through the relay terminal, it means that the relay terminal does not need to maintain In the connection state with the access network device, the access network device sends a first control message to the relay terminal to control the relay terminal to leave the connection state with the access network device.
  • the relay terminal receives the first control message sent by the access network device.
  • the relay terminal leaves the connection state with the access network device.
  • the relay terminal After receiving the first control message sent by the access network device, the relay terminal determines that all communication terminals connected to the access network device through the relay terminal have left the connection state with the access network device. The terminal leaves the connection state with the access network device based on the received first control message.
  • connection state between the relay terminal leaving and the access network device includes two situations:
  • the first is that the relay terminal enters the CM-idle state and/or the RRC (Radio Resource Control, Radio Resource Control)-idle state.
  • RRC Radio Resource Control, Radio Resource Control
  • the first control message sent by the access network device to the relay terminal is the first radio connection release message, and the relay terminal will enter the CM-idle state and/or the RRC-idle state after receiving the first radio connection release message. state.
  • the relay terminal may perform a state transition operation based on the first radio connection release message, and the state transition operation performed includes three cases:
  • the relay terminal enters the CM-idle state.
  • the relay terminal enters the CM-idle state and the RRC-idle state.
  • the relay terminal After the relay terminal receives the first radio connection release message, the relay terminal enters the CM-idle state and the RRC-idle state at the same time. Or, after the relay terminal receives the first radio connection release message, the relay terminal first enters the RRC-idle state, and then transitions to the CM-idle state based on the RRC-idle state.
  • the access network device not only sends the first radio connection release message to the relay terminal, but also sends a context release message to the core network to which the relay terminal is connected.
  • the context release message is used to instruct the core network to which the relay terminal is connected to release the context information of the relay terminal.
  • the context information of the relay terminal is used for data exchange between the relay terminal and the core network to which the relay terminal is connected.
  • the access network device Since the access network device controls the relay terminal to release the wireless connection of the relay terminal, and controls the relay terminal to enter the CM-idle state and/or the RRC-idle state, at this time, the relay terminal does not need to communicate with the core network to which the relay terminal belongs. At this time, the access network device sends a context release message to the core network connected to the relay terminal, and the core network connected to the relay terminal releases the context information of the relay terminal based on the context release message.
  • the access network device when the access network device sends a second wireless connection release message to at least one communication terminal, or when the access network device sends a second wireless connection suspend message to at least one communication terminal, The access network device performs the step of sending the first wireless connection release message to the relay terminal.
  • FIG. 6 shows a flowchart of a state transition method provided by an exemplary embodiment of the present application.
  • a communication terminal establishes a short-range communication connection with a relay terminal, and the relay terminal uses the connected access network
  • the device establishes a connection with the core network to which the relay terminal belongs, and then performs NAS message interaction with the core network to which the relay terminal belongs.
  • the communication terminal establishes a connection with the access network device through the relay terminal, and then establishes a connection with the core network to which the communication terminal belongs. , and perform NAS message interaction with the core network to which the communication terminal belongs.
  • the access network device sends a wireless connection release message to the communication terminal. When it is determined that all communication terminals connected to the access network device through the relay terminal have left the connection state with the access network device, the access network device sends the relay terminal to the relay terminal. Send a wireless connection release message or a wireless connection suspend message.
  • the second is that the relay terminal enters the radio resource control inactive state.
  • the first control message sent by the access network device to the relay terminal is the first radio connection suspension message, and the relay terminal will enter the radio resource control inactive state after receiving the first radio connection suspension message. In addition, the relay terminal transitions to the radio resource control inactive state in the CM-connected state at this time.
  • the access network device when the access network device sends the second wireless connection suspension message to some of the multiple communication terminals, and sends the second wireless connection release message to other communication terminals among the multiple communication terminals Next, the access network device performs the step of sending the first wireless connection suspension message to the relay terminal.
  • FIG. 7 shows a flowchart of a state transition method provided by an exemplary embodiment of the present application.
  • a communication terminal establishes a short-range communication connection with a relay terminal, and the relay terminal passes through the connected access network
  • the device establishes a connection with the core network to which the relay terminal belongs, and then performs NAS message interaction with the core network to which the relay terminal belongs.
  • the communication terminal establishes a connection with the access network device through the relay terminal, and then establishes a connection with the core network to which the communication terminal belongs. , and perform NAS message interaction with the core network to which the communication terminal belongs.
  • the access network device sends a wireless connection suspension message to the communication terminal, and when it is determined that all communication terminals connected to the access network device through the relay terminal have left the connection state with the access network device, the access network device sends a message to the relay The terminal sends a wireless connection suspended message.
  • FIG. 6 and the embodiment in FIG. 7 are only exemplary descriptions of the present application, and the process of establishing a connection between the communication terminal and the access network device through the relay terminal in FIG. 6 and FIG. 7 is only an exemplary description, not limiting Steps 501-504 in this application must be performed on the basis of the process of establishing a connection between the communication terminal and the access network device through the relay terminal.
  • the access network device determines that all communication terminals connected to the access network device through the relay terminal leave the connection state with the access network device as an example.
  • the access network device not only determines that all communication terminals connected to the relay terminal and the access network device leave the connection state with the access network device, but also determines that the relay terminal itself does not have any connection with the access network device.
  • the access network device sends the first control information to the relay terminal, so that the relay terminal leaves the connection state with the access network device, which improves the efficiency of the relay terminal leaving the access network device. The accuracy of the connection status.
  • the embodiments of the present application only take the connection state in which the relay terminal leaves the access network device as an example for description.
  • the relay terminal switches to the CM-connected state, and at this time, it can continue to perform data transmission with the core network to which the relay terminal belongs.
  • the access network device determines that all communication terminals connected to the access network device through the relay terminal have left the connection state with the access network device, it means that the relay terminal does not need to In the connection state with the access network device again, the access network device controls the relay terminal to leave the connection state with the access network device, so as to prevent the situation that the relay terminal is still in the connection state with the access network device and continues to consume resources, The resource consumption of the relay terminal is saved, thereby improving the communication quality of the relay terminal.
  • FIG. 8 shows a block diagram of a state transition apparatus provided by an exemplary embodiment of the present application, which is applied to an access network device, where a relay terminal is connected to the access network device, and the relay terminal is connected to at least one communication terminal, and the communication The terminal is connected to the access network equipment through the relay terminal, and the device includes:
  • a control module 801, configured to control at least one communication terminal to leave a connection state with an access network device
  • the sending module 802 is configured to send a first control message to the relay terminal when it is determined that all communication terminals connected to the access network device through the relay terminal have left the connection state with the access network device. It is used to instruct the relay terminal to leave the connection state with the access network device.
  • the relay terminal leaving the connection state with the access network device includes the relay terminal entering the connection management idle CM-idle state and/or the radio resource control idle RRC-idle state, and the first control message is the first control message.
  • a radio connection release message, the first radio connection release message is used to instruct the relay terminal to transition to the CM-idle state and/or the RRC-idle state.
  • the sending module 802 is further configured to send a context release message to the core network connected to the relay terminal, where the context release message is used to instruct the core network connected to the relay terminal to release the context information of the relay terminal.
  • the relay terminal leaving the connection state with the access network device includes the relay terminal entering the radio resource control inactive state, the first control message is a first radio connection suspension message, and the first radio connection suspension The start message is used to instruct the relay terminal to switch to the RRC inactive state.
  • control module 801 is configured to send a second wireless connection release message to at least one communication terminal, where the second wireless connection release message is used to instruct the communication terminal to transition to the CM-idle state.
  • control module 801 is configured to send a second wireless connection suspension message to at least one communication terminal, where the second wireless connection suspension message is used to instruct the communication terminal to switch to a radio resource control inactive state.
  • the apparatus further includes:
  • the connection establishment module 804 is configured to establish a wireless connection with the relay terminal.
  • FIG. 10 shows a block diagram of a state transition apparatus provided by an exemplary embodiment of the present application, which is applied to a relay terminal.
  • the relay terminal is connected to an access network device, and the relay terminal is connected to at least one communication terminal.
  • the communication terminal passes through The relay terminal is connected to the access network equipment, and the device includes:
  • the receiving module 1001 is configured to receive a first control message sent by the access network device, where the first control message is determined by the access network device when all communication terminals connected to the access network device through the relay terminal leave the communication terminal with the access network device. Sent when connected;
  • the leaving module 1002 is configured to leave the connection state with the access network device based on the first control message.
  • leaving the connection state with the access network device includes entering the CM-idle state and/or the RRC-idle state, the first control message is a first radio connection release message, and the first radio connection release message uses To instruct the relay terminal to transition to the CM-idle state and/or the RRC-idle state.
  • leaving the connection state with the access network device includes entering the radio resource control inactive state, the first control message is a first radio connection suspension message, and the first radio connection suspension message is used for indicating Then the terminal transitions to the radio resource control inactive state.
  • the apparatus further includes:
  • the sending module 1003 is configured to send a connection establishment request to the access network device through the wireless connection with the communication terminal;
  • the connection establishment module 1004 is configured to establish a wireless connection with the access network device.
  • FIG. 12 shows a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.
  • the communication device includes: a processor 1201 , a receiver 1202 , a transmitter 1203 , a memory 1204 , and a bus 1205 .
  • the processor 1201 includes one or more processing cores, and the processor 1201 executes various functional applications and information processing by running software programs and modules.
  • the receiver 1202 and the transmitter 1203 may be implemented as a communication component, which may be a communication chip.
  • the memory 1204 is connected to the processor 1201 through the bus 1205 .
  • the memory 1204 may be configured to store at least one instruction, and the processor 1201 may be configured to execute the at least one instruction to implement various steps in the above method embodiments.
  • the communication device is an access network device or a relay terminal.
  • memory 1204 may be implemented by any type or combination of volatile or non-volatile storage devices including, but not limited to, magnetic or optical disks, electrically erasable and programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Anytime Access Memory (SRAM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Programmable Read Only Memory (PROM) .
  • EEPROM electrically erasable and programmable Read Only Memory
  • EPROM Erasable Programmable Read Only Memory
  • SRAM Static Anytime Access Memory
  • ROM Read Only Memory
  • Magnetic Memory Magnetic Memory
  • Flash Memory Programmable Read Only Memory
  • a computer-readable storage medium in which executable program code is stored, and the executable program code is loaded and executed by the processor to implement the above
  • the method embodiment provides a state transition method performed by a communication device.
  • a chip is also provided, the chip includes programmable logic circuits and/or program instructions, and when the chip runs on an access network device or a relay terminal, it is used to implement such as The above state transition method.
  • a computer program product is also provided, which is used to implement the above state transition method when the computer program product is executed by an access network device or a processor of a relay terminal.

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Abstract

本申请公开了一种状态转换方法、装置、设备及存储介质，涉及移动通信领域。该方法包括：中继终端与接入网设备连接，且中继终端与至少一个通信终端连接，通信终端通过中继终端与接入网设备连接，方法包括：控制至少一个通信终端离开与接入网设备之间的连接状态；在确定通过中继终端与接入网设备连接的所有通信终端离开与接入网设备的连接状态的情况下，向中继终端发送第一控制消息，第一控制消息用于指示中继终端离开与接入网设备之间的连接状态，防止出现中继终端仍然处于与接入网设备的连接状态继续消耗资源的情况，节省了中继终端的资源消耗，进而提高了中继终端的通信质量。

Description

状态转换方法、装置、设备及存储介质 技术领域
本申请涉及移动通信领域，特别涉及一种状态转换方法、装置、设备及存储介质。
背景技术
随着移动通信技术的快速发展以及终端的广泛应用，目前提出了一种以终端为媒介的通信方式，任一终端可以以另一终端为媒介，与核心网连接，从而与核心网进行通信。
以通信终端和中继终端为例，通信终端与中继终端建立连接，中继终端通过接入网设备建立与中继终端所属的核心网之间的连接，此时中继终端转换为CM(Connection Management，连接管理)-connected(已连接)状态。然后通信终端以中继终端为媒介与接入网设备连接，进而通过接入网设备与通信终端所属的核心网连接，通信终端也转换为CM-connected状态，进而与通信终端所属的核心网进行通信。
但是，若通信终端无需再进行通信，会转换为CM-idle(空闲)状态或者无线资源控制非激活状态，而中继终端的状态不变，仍然处于CM-connected状态，导致中继终端的资源处于消耗状态，资源利用率低。
发明内容
本申请实施例提供了一种状态转换方法、装置、设备及存储介质，防止通过中继终端与接入网设备连接的通信终端离开接入网设备的连接状态的情况下，中继终端仍然处于与接入网设备的连接状态的情况，节省了中继终端的资源消耗，进而提高了中继终端的通信质量。所述技术方案如下：
根据本申请的一个方面，提供了一种状态转换方法，应用于接入网设备，中继终端与所述接入网设备连接，且所述中继终端与至少一个通信终端连接，所述通信终端通过所述中继终端与所述接入网设备连接，所述方法包括：
控制所述至少一个通信终端离开与所述接入网设备之间的连接状态；
在确定通过所述中继终端与所述接入网设备连接的所有通信终端离开与所述接入网设备的连接状态的情况下，向所述中继终端发送第一控制消息，所述第一控制消息用于指示所述中继终端离开与所述接入网设备之间的连接状态。
根据本申请的一个方面，提供了一种状态转换方法，应用于中继终端，所述中继终端与接入网设备连接，且所述中继终端与至少一个通信终端连接，所述通信终端通过所述中继终端与所述接入网设备连接，所述方法包括：
接收所述接入网设备发送的第一控制消息，所述第一控制消息由所述接入网设备在确定通过所述中继终端与所述接入网设备连接的所有通信终端离开与所述接入网设备的连接状态的情况下发送；
基于所述第一控制消息，离开与所述接入网设备之间的连接状态。
根据本申请的一个方面，提供了一种状态转换装置，应用于接入网设备，中继终端与所述接入网设备连接，且所述中继终端与至少一个通信终端连接，所述通信终端通过所述中继终端与所述接入网设备连接，所述装置包括：
控制模块，用于控制所述至少一个通信终端离开与所述接入网设备之间的连接状态；
发送模块，用于在确定通过所述中继终端与所述接入网设备连接的所有通信终端离开与所述接入网设备的连接状态的情况下，向所述中继终端发送第一控制消息，所述第一控制消息用于指示所述中继终端离开与所述接入网设备之间的连接状态。
根据本申请的一个方面，提供了一种状态转换装置，应用于中继终端中，所述中继终端与接入网设备连接，且所述中继终端与至少一个通信终端连接，所述通信终端通过所述中继终端与所述接入网设备连接，所述装置包括：
控制模块，用于控制所述至少一个通信终端离开与所述接入网设备之间的连接状态；
发送模块，用于在确定通过所述中继终端与所述接入网设备连接的所有通信终端离开与所述接入网设备的连接状态的情况下，向所述中继终端发送第一控制消息，所述第一控制消息用于指示所述中继终端离开与所述接入网设备之间的连接状态。
根据本申请的一个方面，提供了一种接入网设备，所述接入网设备包括：处理器；与所述处理器相连的收发器；用于存储所述处理器的可执行程序代码的存储器；其中，所述处理器被配置为加载并执行所述可执行程序代码以实现 如上述方面所述的状态转换方法。
根据本申请的一个方面，提供了一种中继终端，所述中继终端包括：处理器；与所述处理器相连的收发器；用于存储所述处理器的可执行指令的存储器；其中，所述处理器被配置为加载并执行所述可执行指令以实现如上述方面所述的状态转换方法。
根据本申请的一个方面，提供了一种计算机可读存储介质，所述可读存储介质中存储有可执行程序代码，所述可执行程序代码由所述处理器加载并执行以实现如上述方面所述的状态转换方法。
根据本申请的一个方面，提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在接入网设备或中继终端上运行时，用于实现如上述方面所述的状态转换方法。
根据本申请的一个方面，本申请实施例提供了一种计算机程序产品，当所述计算机程序产品被接入网设备或中继终端的处理器执行时，其用于实现上述方面所述的状态转换方法。
本申请实施例提供的技术方案至少包括如下有益效果：
本申请实施例提供的方法、装置、设备及存储介质，接入网设备在确定中继终端连接的至少一个通信终端均离开与接入网设备的连接状态的情况下，可以控制中继终端离开与接入网设备的连接状态，防止通过中继终端与接入网设备连接的通信终端离开接入网设备的连接状态的情况下，中继终端仍然处于与接入网设备的连接状态的情况，节省了中继终端的资源消耗，进而提高了中继终端的通信质量。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1示出了本申请一个示例性实施例提供的网络结构的结构示意图。
图2示出了本申请一个示例性实施例提供的通信终端通过中继终端进行通信的框图。
图3示出了本申请一个示例性实施例提供的通信系统的框图。
图4示出了本申请一个示例性实施例提供的通信方法的流程图。
图5示出了本申请一个示例性实施例提供的状态转换方法的流程图。
图6示出了本申请一个示例性实施例提供的状态转换方法的流程图。
图7示出了本申请一个示例性实施例提供的状态转换方法的流程图。
图8示出了本申请一个示例性实施例提供的状态转换装置的框图。
图9示出了本申请另一个示例性实施例提供的状态转换装置的框图。
图10示出了本申请一个示例性实施例提供的状态转换装置的框图。
图11示出了本申请另一个示例性实施例提供的状态转换装置的框图。
图12示出了本申请一个示例性实施例提供的通信设备的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
首先，对本申请实施例所涉及的名词进行解释：
网络系统架构：在本申请实施例中，网络系统架构如图1所示，该网络系统架构中包括终端、接入网、UPF(User Plane Function，用户平面功能)网元、外部数据网络、AMFAccess Management Function，接入管理功能)网元、SMF(Session Management Function，会话管理功能)网元、PCF(Policy Control function，策略控制功能)网元、AF(Application Function，应用层功能)网元、NSSF(Network SliceSelection Function，网络切片选择功能)网元、AUSF(Authentication Server Function，鉴权服务功能)网元和UDM(Unified Data Management，统一数据管理功能)网元，终端通过Uu(一种通信接口)接口与接入网进行接入层连接，进而交互接入层消息和无线数据传输，终端通过N1(一种通信接口)接口与AMF网元进行非接入层连接，交互NAS(None Access Stratum，非接入层)消息。其中，AMF网元具有核心网中的移动性管理功能，SMF具有核心网中的会话管理功能，AMF网元除了对终端进行移动性管理之外，还负责将从会话管理消息在终端和SMF网元之间的转发，且AMF网元通过N11(一种通信接口)接口与SMF网元进行数据交互。PCF网元是核心网中具有策略管理功能，负责制定对终端的移动性管理、会话管理、计费等相关的策略，且通过N7(一种通信接口)接口与SMF网元进行数据交互，另外PCF网元通过N15(一种通信接口)接口与AMF进行数据交互。UPF网元在核心网中的具 有用户面功能，通过N6(一种通信接口)接口与外部数据网络进行数据传输，通过N3(一种通信接口)接口与接入网进行数据传输。终端通过Uu口接入移动通信网络后，在SMF网元的控制下建立PDU会话进行数据传输。NSSF网元通过N22(一种通信接口)接口与AMF网元进行数据交互。AUSF网元通过N12(一种通信接口)接口与AMF网元进行数据交互，通过N13(一种通信接口)接口与UDM网元进行数据交互。UDM网元通过N8(一种通信接口)接口与AMF网元进行数据交互，通过N10(一种通信接口)接口与SMF网元进行数据交互。
终端所处的状态：已经注册到网络的终端与AMF之间具有两种连接管理状态：空闲态或者连接态。若终端与接入网设备之间建立连接之后，接入网设备与AMF建立连接，从而终端可以与AMF进行NAS消息的交互，此时终端处于CM-connected状态，AMF也将终端的状态标记为CM-connected状态。若终端与接入网设备之间的连接释放，终端进入CM-idle状态，接入网设备与AMF之间的连接也会释放，AMF也将终端的状态标记为CM-idle状态。当终端与接入网设备之间的连接挂起，终端处于CM-connected状态的无线连接非激活状态，此时接入网设备与AMF之间的连接继续保持，AMF仍然将UE状态标记为CM-connected状态。
中继终端和通信终端：在本申请实施例中，中继终端和通信终端为具有Prose(Proximity Services，近距离服务)能力的终端，中继终端和通信终端能够通过PC5接口建立连接并进行通信。并且，如图2所示，中继终端不仅可以通过移动通信网络连接接入网设备，还可以作为relay(中转)终端，通信终端通过PC5接口与中继终端建立连接后，中继终端通过Uu接口与接入网设备建立连接，进而通信终端以该中继终端为媒介与接入网设备进行连接，进而与通信终端所属的核心网进行数据交互，另外还能够通过NG(一种通信接口)接口与接入层进行消息交互。
图3示出了本申请一个示例性实施例提供的通信系统的框图，该通信系统可以包括：接入网12、中继终端13和通信终端14。
接入网12中包括若干个网络设备120。网络设备120可以是基站，所述基 站是一种部署在接入网中用以为终端提供无线通信功能的装置。基站可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如在LTE系统中，称为eNodeB或者eNB；在5G NR-U系统中，称为gNodeB或者gNB。随着通信技术的演进，“基站”这一描述可能会变化。为方便本申请实施例中，上述为中继终端13提供无线通信功能的装置统称为接入网设备。
中继终端13、通信终端14和可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其他处理设备，以及各种形式的用户设备，移动台(Mobile Station，MS)，终端(terminal device)等等。为方便描述，上面提到的设备统称为终端。接入网设备120与中继终端13之间通过某种空口技术互相通信，例如Uu接口，并且，中继终端13和通信终端14通过近距离通信连接。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、新无线(New Radio，NR)系统、NR系统的演进系统、非授权频段上的LTE(LTE-based access to unlicensed spectrum，LTE-U)系统、NR-U系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统、无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、下一代通信系统或其他通信系统等。
通常来说，传统的通信系统支持的连接数有限，也易于实现，然而，随着通信技术的发展，移动通信系统将不仅支持传统的通信，还将支持例如，设备到设备(Device to Device，D2D)通信，机器到机器(Machine to Machine，M2M)通信，机器类型通信(Machine Type Communication，MTC)，车辆间(Vehicle to Vehicle，V2V)通信以及车联网(Vehicle to everything，V2X)系统等。本申请实施例也可以应用于这些通信系统。
首先，先对通信终端通过中继终端与接入网设备连接的过程进行说明。例如，图4示出了本申请一个示例性实施例提供的通信方法的流程图，应用于如图1所述的通信终端、中继终端和接入网设备中，该方法包括以下内容中的至少部分内容：
401、通信终端与中继终端建立连接。
在本申请实施例中，通信终端和中继终端均具有近距离通信能力，若通信终端与中继终端位于近距离通信范围内，则通信终端与中继终端建立近距离通信连接。
在一些实施例中，该中继终端具有近距离通信能力，持续发送广播消息，该广播消息用于指示该中继终端可以提供中继业务，供其他终端连接。而若通信终端需要进行数据传输，而通信终端当前无法连接接入网设备，且扫描获取到中继终端发送的广播消息，则通信终端向该中继终端发送连接请求消息，中继终端基于该连接请求消息与通信终端建立近距离通信连接。
其中，通信终端通过PC5(一种通信接口)接口与中继终端建立近距离通信连接。
402、中继终端与接入网设备建立连接，通过与接入网设备之间的连接与中继终端所属的核心网建立连接。
在本申请实施例中，中继终端与通信终端建立近距离通信连接后，通信终端可以触发中继终端与接入网设备之间建立连接，进而基于与接入网设备之间的连接建立与中继终端所属的核心网之间的连接。
其中，中继终端位于接入网设备的广播范围，且中继终端已与通信终端建立近距离通信连接，则中继终端向接入网设备发送连接建立请求，进而接入网设备基于连接建立请求建立与中继终端之间的连接。并且，中继终端与接入网设备建立连接后，中继终端还可以通过与接入网设备之间的连接建立与中继终端所属的核心网之间的连接。
在一些实施例中，该核心网为AMF网元，或者为其他网元，本申请实施例不做限定。
需要说明的是，中继终端与该中继终端所属的核心网建立连接后，该中继终端进入CM-connected状态。
403、中继终端通过连接的接入网设备与中继终端所属的核心网进行NAS 消息交互。
404、通信终端通过中继终端与接入网设备建立连接。
在本申请实施例中，通信终端与中继终端通过步骤201建立近距离通信连接后，则中继终端可以执行转发业务，通信终端通过与中继终端之间的近距离通信连接建立与接入网设备之间的连接。
其中，该中继设备为转发设备，中继终端接收到通信终端发送的通信消息后，直接将该通信消息发送给连接的接入网设备，实际上该中继终端为用于进行透传的设备，以该中继终端为媒介实现了通信终端与接入网设备之间的连接。
需要说明的是，本申请实施例仅是以401在402-403之前执行，402-403在步骤404之前执行为例进行说明。在另一实施例中，401还可以在402-403之后执行，404在402-403之前执行，或者还可以按照其他顺序执行，本申请并不限定401、402-403、404之间的先后执行顺序。
405、通信终端通过连接的接入网设备与通信终端所属的核心网进行NAS消息交互。
在本申请实施例中，通信终端通过中继终端与接入网设备连接后，该通信终端能够基于与接入网设备之间的连接建立与通信终端所属的核心网之间的连接，进而通信终端能够与通信终端所属的核心网进行NAS消息的交互。
其中，通信终端所属的核心网为AMF网元，或者为其他网元，本申请实施例不做限定。
需要说明的是，中继终端与该中继终端所属的核心网建立连接后，该中继终端进入CM-connected状态。
本申请实施例提供的通信方法，将中继终端作为媒介，以使通信终端通过与中继终端与接入网设备连接，进而通信终端基于与接入网设备之间的连接与通信终端所属的核心网进行NAS消息交互，该中继终端扩展了接入网设备的覆盖范围，提高了通信终端与接入网设备连接以实现通信的效率。
图4实施例示出了通信终端通过中继终端建立与通信终端所属的核心网之间的连接，进而实现通信的过程。而通信终端可能会离开与接入网设备的连接状态，接入网设备会基于通信终端的状态控制中继终端所处的状态，具体过程请参见图5。另外，本申请中的图4实施例与图5实施例可以为相互独立的实施例，也可以将图4实施例和图5实施例结合。其中，图5示出了本申请一个示 例性实施例提供的状态转换方法的流程图，应用于如图1所示的通信终端、中继终端和接入网设备中，其中，中继终端与接入网设备连接，且中继终端与至少一个通信终端连接，通信终端通过中继终端与接入网设备连接，该方法包括以下内容中的至少部分内容：
501、接入网设备控制至少一个通信终端离开与接入网设备之间的连接状态。
在本申请实施例中，接入网设备连接有至少一个通信终端，每个通信终端均可以基于该接入网设备与通信终端所属的核心网进行通信，而若通信终端没有正在进行的业务，此时通信终端需要离开与接入网设备之间的连接状态，接入网设备控制该通信终端离开与接入网设备之间的连接状态。
其中，通信终端当前处于与接入网设备的连接状态，且该连接状态为CM-connected状态。
在本申请实施例中，通信终端离开与接入网设备的连接状态包括两种情况：第一种、通信终端释放与接入网设备之间的无线连接，转换为CM-idle状态。第二种、通信终端挂起与接入网设备之间的无线连接，转换为无线资源控制非激活态。
对于第一种情况：接入网设备向至少一个通信终端发送第二无线连接释放消息。
其中，第二无线连接释放消息用于指示通信终端转换为CM-idle状态。
由于接入网设备需要控制连接的至少一个通信终端离开与接入网设备之间的连接状态，接入网设备向至少一个通信终端发送第二无线连接释放消息，通信终端接收到接入网设备发送的第二无线连接释放消息后，基于该第二无线连接释放消息转换为CM-idle状态，此时该通信终端不再与接入网设备进行通信。
对于第二种情况：向至少一个通信终端发送第二无线连接挂起消息。
其中，第二无线连接挂起消息用于指示通信终端转换为无线资源控制非激活态。
由于接入网设备需要控制连接的至少一个通信终端离开与接入网设备之间的连接状态，接入网设备向至少一个通信终端发送第二无线连接挂起消息，通信终端接收到接入网设备发送的第二无线连接挂起消息后，基于该第二无线连接释放消息转换为无线资源控制非激活态，此时该通信终端不再与接入网设备进行通信。
需要说明的是，本申请实施例是以中继终端与接入网设备处于连接状态为 例进行说明。在另一实施例中，中继终端需要先与接入网设备进行连接，中继终端通过与通信终端之间的无线连接，确定需要与接入网设备建立连接，向接入网设备发送连接建立请求，接入网设备通过与通信终端之间的连接，接入中继终端发送的连接建立请求，进而与中继终端建立无线连接。
502、在确定通过中继终端与接入网设备连接的所有通信终端离开与接入网设备的连接状态的情况下，接入网设备向中继终端发送第一控制消息。
其中，第一控制消息用于指示中继终端离开与接入网设备之间的连接状态。
在本申请实施例中，由于接入网设备控制与该接入网设备连接的至少一个通信终端离开与接入网设备的连接状态，并且接入网设备还会记录通过中继终端连接到接入网设备的通信终端，若对于一个中继终端来说，通过该中继终端实现与接入网设备的所有通信终端均离开与接入网设备的连接状态，说明该中继终端无需再保持与接入网设备之间的连接状态，则接入网设备向该中继终端发送第一控制消息，控制该中继终端离开与接入网设备之间的连接状态。
503、中继终端接收接入网设备发送的第一控制消息。
504、中继终端基于第一控制消息，离开与接入网设备之间的连接状态。
中继终端接收到接入网设备发送的第一控制消息后，确定通过该中继终端与接入网设备连接的所用通信终端均离开与接入网设备之间的连接状态，因此该中继终端基于接收到的第一控制消息，离开与接入网设备之间的连接状态。
在一些实施例中，中继终端离开与接入网设备之间的连接状态包括两种情况：
第一种、中继终端进入CM-idle状态和/或RRC(Radio Resource Control，无线资源控制)-idle状态。
其中，接入网设备向中继终端发送的第一控制消息为第一无线连接释放消息，中继终端接收到该第一无线连接释放消息后，会进入CM-idle状态和/或RRC-idle状态。
在一些实施例中，中继终端接收到第一无线连接释放消息后，可以基于该第一无线连接释放消息，执行状态转换的操作，且执行的状态转换操作包括三种情况：
(1)中继终端进入CM-idle状态。
(2)中级终端进入RRC-idle状态。
(3)中继终端进入CM-idle状态和RRC-idle状态。
其中，中继终端接收到第一无线连接释放消息后，中继终端同时进入CM-idle状态和RRC-idle状态。或者，中继终端接收到第一无线连接释放消息后，中继终端先进入RRC-idle状态，再基于该RRC-idle状态转换为CM-idle状态。
在另一些实施例中，接入网设备不仅向中继终端发送第一无线连接释放消息，还会向中继终端连接的核心网发送上下文释放消息。
其中，上下文释放消息用于指示中继终端连接的核心网释放中继终端的上下文信息。中继终端的上下文信息用于供中继终端与中继终端连接的核心网进行数据交互。
由于接入网设备控制中继终端释放中继终端的无线连接，控制中继终端进入CM-idle状态和/或RRC-idle状态，此时中继终端不需要再与中继终端所属的核心网进行通信，此时接入网设备向中继终端连接的核心网发送上下文释放消息，则中继终端连接的核心网基于上下文释放消息释放中继终端的上下文信息。
在一些实施例中，在接入网设备向至少一个通信终端发送第二无线连接释放消息的情况下，或者在接入网设备向至少一个通信终端发送第二无线连接挂起消息的情况下，接入网设备执行向中继终端发送第一无线连接释放消息的步骤。
例如，图6示出了本申请一个示例性实施例提供的状态转换方法的流程图，如图6所示，通信终端与中继终端建立近距离通信连接，中继终端通过连接的接入网设备与中继终端所属的核心网建立连接，进而与中继终端所属的核心网进行NAS消息交互，通信终端通过中继终端与接入网设备建立连接，进而与通信终端所属的核心网建立连接，与通信终端所属的核心网进行NAS消息交互。接入网设备向通信终端发送无线连接释放消息，在确定通过中继终端与接入网设备连接的所有通信终端离开与接入网设备的连接状态的情况下，接入网设备向中继终端发送无线连接释放消息或无线连接挂起消息。
第二种、中继终端进入无线资源控制非激活态。
其中，接入网设备向中继终端发送的第一控制消息为第一无线连接挂起消息，中继终端接收到该第一无线连接挂起消息后，会进入无线资源控制非激活态。另外，中继终端此时转换为CM-connected状态的无线资源控制非激活态。
杂一些实施例中，在接入网设备向至少一个通信终端发送第二无线连接挂起消息的情况下，接入网设备执行向中继终端发送第一无线连接挂起消息的步 骤。
在另一些实施例中，在接入网设备向多个通信终端中的部分通信终端发送第二无线连接挂起消息，向多个通信终端中的其他通信终端发送第二无线连接释放消息的情况下，接入网设备执行向中继终端发送第一无线连接挂起消息的步骤。
例如，图7示出了本申请一个示例性实施例提供的状态转换方法的流程图，如图7所示，通信终端与中继终端建立近距离通信连接，中继终端通过连接的接入网设备与中继终端所属的核心网建立连接，进而与中继终端所属的核心网进行NAS消息交互，通信终端通过中继终端与接入网设备建立连接，进而与通信终端所属的核心网建立连接，与通信终端所属的核心网进行NAS消息交互。接入网设备向通信终端发送无线连接挂起消息，在确定通过中继终端与接入网设备连接的所有通信终端离开与接入网设备的连接状态的情况下，接入网设备向中继终端发送无线连接挂起消息。
其中，图6实施例和图7实施例仅是本申请的示例性说明，图6和图7中通信终端通过中继终端与接入网设备建立连接的过程仅是示例性说明，并不限定本申请中的步骤501-504必须在通信终端通过中继终端与接入网设备建立连接的过程的基础上执行。
需要说明的第二点是，本申请实施例仅是以接入网设备确定通过中继终端与接入网设备连接的所有通信终端离开与接入网设备的连接状态为例进行说明。在另一实施例中，接入网设备不仅在确定中继终端与接入网设备连接的所有通信终端离开与接入网设备的连接状态，而且还要在确定中继终端自身也不存在与连接的核心网之间存在业务传输时，接入网设备向中继终端发送第一控制信息，以使中继终端离开与接入网设备的连接状态，提高了中继终端离开接入网设备的连接状态的准确性。
需要说明的第三点是，本申请实施例仅是以中继终端离开接入网设备的连接状态为例进行说明。在另一实施例中，若中继终端需要业务传输，则中继终端转换为CM-connected状态，此时可以继续与中继终端所属的核心网继续进行数据传输。
本申请实施例提供的方法，在接入网设备确定通过中继终端与接入网设备连接的所有通信终端均离开了与接入网设备的连接状态的情况下，说明此时中继终端无需再处于与接入网设备的连接状态，接入网设备控制中继终端离开与 接入网设备的连接状态，防止出现中继终端仍然处于与接入网设备的连接状态继续消耗资源的情况，节省了中继终端的资源消耗，进而提高了中继终端的通信质量。
图8示出了本申请一个示例性实施例提供的状态转换装置的框图，应用于接入网设备中，中继终端与接入网设备连接，且中继终端与至少一个通信终端连接，通信终端通过中继终端与接入网设备连接，装置包括：
控制模块801，用于控制至少一个通信终端离开与接入网设备之间的连接状态；
发送模块802，用于在确定通过中继终端与接入网设备连接的所有通信终端离开与接入网设备的连接状态的情况下，向中继终端发送第一控制消息，第一控制消息用于指示中继终端离开与接入网设备之间的连接状态。
在一些实施例中，中继终端离开与接入网设备之间的连接状态包括中继终端进入连接管理空闲CM-idle状态和/或无线资源控制空闲RRC-idle状态，第一控制消息为第一无线连接释放消息，第一无线连接释放消息用于指示中继终端转换为CM-idle状态和/或RRC-idle状态。
在一些实施例中，发送模块802，还用于向中继终端连接的核心网发送上下文释放消息，上下文释放消息用于指示中继终端连接的核心网释放中继终端的上下文信息。
在一些实施例中，中继终端离开与接入网设备之间的连接状态包括中继终端进入无线资源控制非激活态，第一控制消息为第一无线连接挂起消息，第一无线连接挂起消息用于指示中继终端转换为无线资源控制非激活态。
在一些实施例中，控制模块801，用于向至少一个通信终端发送第二无线连接释放消息，第二无线连接释放消息用于指示通信终端转换为CM-idle状态。
在一些实施例中，控制模块801，用于向至少一个通信终端发送第二无线连接挂起消息，第二无线连接挂起消息用于指示通信终端转换为无线资源控制非激活态。
在一些实施例中，参见图9，装置还包括：
接收模块803，用于接收中继终端发送的连接建立请求；
连接建立模块804，用于与中继终端建立无线连接。
图10示出了本申请一个示例性实施例提供的状态转换装置的框图，应用于中继终端，中继终端与接入网设备连接，且中继终端与至少一个通信终端连接，通信终端通过中继终端与接入网设备连接，装置包括：
接收模块1001，用于接收接入网设备发送的第一控制消息，第一控制消息由接入网设备在确定通过中继终端与接入网设备连接的所有通信终端离开与接入网设备的连接状态的情况下发送；
离开模块1002，用于基于第一控制消息，离开与接入网设备之间的连接状态。
在一些实施例中，离开与接入网设备之间的连接状态包括进入CM-idle状态和/或RRC-idle状态，第一控制消息为第一无线连接释放消息，第一无线连接释放消息用于指示中继终端转换为CM-idle状态和/或RRC-idle状态。
在一些实施例中，离开与接入网设备之间的连接状态包括进入无线资源控制非激活态，第一控制消息为第一无线连接挂起消息，第一无线连接挂起消息用于指示中继终端转换为无线资源控制非激活态。
在一些实施例中，参见图11，装置还包括：
发送模块1003，用于通过与通信终端之间的无线连接，向接入网设备发送连接建立请求；
连接建立模块1004，用于与接入网设备建立无线连接。
图12示出了本申请一个示例性实施例提供的通信设备的结构示意图，该通信设备包括：处理器1201、接收器1202、发射器1203、存储器1204和总线1205。
处理器1201包括一个或者一个以上处理核心，处理器1201通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器1202和发射器1203可以实现为一个通信组件，该通信组件可以是一块通信芯片。
存储器1204通过总线1205与处理器1201相连。
存储器1204可用于存储至少一个指令，处理器1201用于执行该至少一个指令，以实现上述方法实施例中的各个步骤。
其中，该通信设备为接入网设备或者为中继终端。
此外，存储器1204可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：磁盘或光盘，电可擦 除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，静态随时存取存储器(SRAM)，只读存储器(ROM)，磁存储器，快闪存储器，可编程只读存储器(PROM)。
在示例性实施例中，还提供了一种计算机可读存储介质，所述可读存储介质中存储有可执行程序代码，所述可执行程序代码由所述处理器加载并执行以实现上述各个方法实施例提供的由通信设备执行的状态转换方法。
在示例性实施例中，还提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在接入网设备或者为中继终端上运行时，用于实现如上述状态转换方法。
在示例性实施例中，还提供了一种计算机程序产品，当所述计算机程序产品被接入网设备或者为中继终端的处理器执行时，其用于实现上述状态转换方法。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (25)

  1. 一种状态转换方法，其特征在于，应用于接入网设备，中继终端与所述接入网设备连接，且所述中继终端与至少一个通信终端连接，所述通信终端通过所述中继终端与所述接入网设备连接，所述方法包括：
    控制所述至少一个通信终端离开与所述接入网设备之间的连接状态；
    在确定通过所述中继终端与所述接入网设备连接的所有通信终端离开与所述接入网设备的连接状态的情况下，向所述中继终端发送第一控制消息，所述第一控制消息用于指示所述中继终端离开与所述接入网设备之间的连接状态。
  2. 根据权利要求1所述的方法，其特征在于，所述中继终端离开与所述接入网设备之间的连接状态包括所述中继终端进入连接管理空闲CM-idle状态和/或无线资源控制空闲RRC-idle状态，所述第一控制消息为第一无线连接释放消息，所述第一无线连接释放消息用于指示所述中继终端转换为所述CM-idle状态和/或RRC-idle状态。
  3. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    向所述中继终端连接的核心网发送上下文释放消息，所述上下文释放消息用于指示所述中继终端连接的核心网释放所述中继终端的上下文信息。
  4. 根据权利要求1所述的方法，其特征在于，所述中继终端离开与所述接入网设备之间的连接状态包括所述中继终端进入无线资源控制非激活态，所述第一控制消息为第一无线连接挂起消息，所述第一无线连接挂起消息用于指示所述中继终端转换为所述无线资源控制非激活态。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述控制所述至少一个通信终端离开与所述接入网设备之间的连接状态，包括：
    向所述至少一个通信终端发送第二无线连接释放消息，所述第二无线连接释放消息用于指示所述通信终端转换为CM-idle状态。
  6. 根据权利要求1或4所述的方法，其特征在于，所述控制所述至少一个通信终端离开与所述接入网设备之间的连接状态，包括：
    向所述至少一个通信终端发送第二无线连接挂起消息，所述第二无线连接挂起消息用于指示所述通信终端转换为所述无线资源控制非激活态。
  7. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    接收所述中继终端发送的连接建立请求；
    与所述中继终端建立无线连接。
  8. 一种状态转换方法，其特征在于，应用于中继终端，所述中继终端与接入网设备连接，且所述中继终端与至少一个通信终端连接，所述通信终端通过所述中继终端与所述接入网设备连接，所述方法包括：
    接收所述接入网设备发送的第一控制消息，所述第一控制消息由所述接入网设备在确定通过所述中继终端与所述接入网设备连接的所有通信终端离开与所述接入网设备的连接状态的情况下发送；
    基于所述第一控制消息，离开与所述接入网设备之间的连接状态。
  9. 根据权利要求8所述的方法，其特征在于，所述离开与所述接入网设备之间的连接状态包括进入CM-idle状态和/或空闲RRC-idle状态，所述第一控制消息为第一无线连接释放消息，所述第一无线连接释放消息用于指示所述中继终端转换为所述CM-idle状态和/或RRC-idle状态。
  10. 根据权利要求8所述的方法，其特征在于，所述离开与所述接入网设备之间的连接状态包括进入无线资源控制非激活态，所述第一控制消息为第一无线连接挂起消息，所述第一无线连接挂起消息用于指示所述中继终端转换为所述无线资源控制非激活态。
  11. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    通过与所述通信终端之间的无线连接，向所述接入网设备发送连接建立请求；
    与所述接入网设备建立无线连接。
  12. 一种状态转换装置，其特征在于，应用于接入网设备，中继终端与所述接入网设备连接，且所述中继终端与至少一个通信终端连接，所述通信终端通过所述中继终端与所述接入网设备连接，所述装置包括：
    控制模块，用于控制所述至少一个通信终端离开与所述接入网设备之间的连接状态；
    发送模块，用于在确定通过所述中继终端与所述接入网设备连接的所有通信终端离开与所述接入网设备的连接状态的情况下，向所述中继终端发送第一控制消息，所述第一控制消息用于指示所述中继终端离开与所述接入网设备之间的连接状态。
  13. 根据权利要求12所述的装置，其特征在于，所述中继终端离开与所述接入网设备之间的连接状态包括所述中继终端进入连接管理空闲CM-idle状态和/或无线资源控制空闲RRC-idle状态，所述第一控制消息为第一无线连接释放消息，所述第一无线连接释放消息用于指示所述中继终端转换为所述CM-idle状态和/或RRC-idle状态。
  14. 根据权利要求13所述的装置，其特征在于，所述发送模块，还用于向所述中继终端连接的核心网发送上下文释放消息，所述上下文释放消息用于指示所述中继终端连接的核心网释放所述中继终端的上下文信息。
  15. 根据权利要求12所述的装置，其特征在于，所述中继终端离开与所述接入网设备之间的连接状态包括所述中继终端进入无线资源控制非激活态，所述第一控制消息为第一无线连接挂起消息，所述第一无线连接挂起消息用于指示所述中继终端转换为所述无线资源控制非激活态。
  16. 根据权利要求12至15任一项所述的装置，其特征在于，所述控制模块，用于向所述至少一个通信终端发送第二无线连接释放消息，所述第二无线连接释放消息用于指示所述通信终端转换为CM-idle状态。
  17. 根据权利要求12或15所述的装置，其特征在于，所述控制模块，用于向所述至少一个通信终端发送第二无线连接挂起消息，所述第二无线连接挂起消息用于指示所述通信终端转换为所述无线资源控制非激活态。
  18. 根据权利要求12所述的装置，其特征在于，所述装置还包括：
    接收模块，用于接收所述中继终端发送的连接建立请求；
    连接建立模块，用于与所述中继终端建立无线连接。
  19. 一种状态转换装置，其特征在于，应用于中继终端，所述中继终端与接入网设备连接，且所述中继终端与至少一个通信终端连接，所述通信终端通过所述中继终端与所述接入网设备连接，所述装置包括：
    接收模块，用于接收所述接入网设备发送的第一控制消息，所述第一控制消息由所述接入网设备在确定通过所述中继终端与所述接入网设备连接的所有通信终端离开与所述接入网设备的连接状态的情况下发送；
    离开模块，用于基于所述第一控制消息，离开与所述接入网设备之间的连接状态。
  20. 根据权利要求19所述的装置，其特征在于，所述离开与所述接入网设备之间的连接状态包括进入CM-idle状态和/或空闲RRC-idle状态，所述第一控制消息为第一无线连接释放消息，所述第一无线连接释放消息用于指示所述中继终端转换为所述CM-idle状态和/或RRC-idle状态。
  21. 根据权利要求19所述的装置，其特征在于，所述离开与所述接入网设备之间的连接状态包括进入无线资源控制非激活态，所述第一控制消息为第一无线连接挂起消息，所述第一无线连接挂起消息用于指示所述中继终端转换为所述无线资源控制非激活态。
  22. 根据权利要求19所述的装置，其特征在于，所述装置还包括：
    发送模块，用于通过与所述通信终端之间的无线连接，向所述接入网设备 发送连接建立请求；
    连接建立模块，用于与所述接入网设备建立无线连接。
  23. 一种接入网设备，其特征在于，所述接入网设备包括：
    处理器；
    与所述处理器相连的收发器；
    用于存储所述处理器的可执行程序代码的存储器；
    其中，所述处理器被配置为加载并执行所述可执行程序代码以实现如权利要求1-7任一所述的状态转换方法。
  24. 一种中继终端，其特征在于，所述中继终端包括：
    处理器；
    与所述处理器相连的收发器；
    用于存储所述处理器的可执行程序代码的存储器；
    其中，所述处理器被配置为加载并执行所述可执行程序代码以实现如权利要求8-11任一所述的状态转换方法。
  25. 一种计算机可读存储介质，其特征在于，所述可读存储介质中存储有可执行程序代码，所述可执行程序代码由所述处理器加载并执行以实现如权利要求1至11任一所述的状态转换方法。
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