WO2022104531A1 - 连接方法及相关装置 - Google Patents

连接方法及相关装置 Download PDF

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Publication number
WO2022104531A1
WO2022104531A1 PCT/CN2020/129413 CN2020129413W WO2022104531A1 WO 2022104531 A1 WO2022104531 A1 WO 2022104531A1 CN 2020129413 W CN2020129413 W CN 2020129413W WO 2022104531 A1 WO2022104531 A1 WO 2022104531A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
connection
interface
access network
connection mode
Prior art date
Application number
PCT/CN2020/129413
Other languages
English (en)
French (fr)
Inventor
杨明月
周润泽
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20961823.0A priority Critical patent/EP4236472A4/en
Priority to PCT/CN2020/129413 priority patent/WO2022104531A1/zh
Priority to CN202080106017.9A priority patent/CN116368859A/zh
Publication of WO2022104531A1 publication Critical patent/WO2022104531A1/zh
Priority to US18/318,509 priority patent/US20230292208A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H04W36/033—Reselecting a link using a direct mode connection in pre-organised networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • 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

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a connection method and related devices.
  • D2D (device to device) technology refers to the technology of direct communication between two terminal devices. That is, the direct communication between two terminal devices bypasses the access network device.
  • FIG. 1A is a schematic diagram of the network architecture, in this network architecture, a terminal device 1 (which may be called a remote device) that is not within the coverage of the wireless network can utilize the D2D technology to connect to another within the coverage of the network by connecting
  • the terminal device 2 (which may be called a relay device) accesses the wireless network. That is, the remote device can access the network through the relay device.
  • the relay device is connected to the access network device in the wireless network through the Uu interface, and the remote device is connected to the relay device through the PC5 interface.
  • the terminal device During the movement of the terminal device 1, it will move from within the coverage of the wireless network to outside the coverage of the wireless network, and may also move from outside the coverage of the wireless network to within the coverage of the wireless network. During the moving process, the terminal device will switch the connection mode with the access network device.
  • the solution for switching the connection mode between the terminal equipment and the access network equipment is that the terminal equipment 1 moves from the coverage of the wireless network to the coverage of the wireless network When outside the range, the connection mode between the terminal device 1 and the access network device is switched to that the terminal device 1 is directly connected to the access network device in the wireless network through the Uu interface. Further, when the terminal device 1 moves from within the coverage of the wireless network to outside the coverage of the wireless network, the connection mode between the terminal device 1 and the access network device will be switched to: the terminal device 1 communicates with the terminal through the PC5 interface. The device 2 is connected, and then the terminal device 2 is connected to the access network device.
  • the terminal device has different connection requirements in different scenarios.
  • the solution of switching the connection mode between the terminal device and the access network device cannot meet the connection requirements of the terminal device well.
  • the present application provides a connection method and a related device, which help to better meet the connection requirements of terminal equipment.
  • the present application provides a connection method, comprising: an access network device acquiring connection mode preference information of a first terminal device, the connection mode preference information indicating the connection mode preference of the first terminal device; The network access device sends path switching information to the first terminal device according to the connection mode preference information, where the path switching information is used to switch the connection mode between the first terminal device and the access network device.
  • the access network device sends path switching information to the first terminal device according to the connection mode preference information of the first terminal device, and the first terminal device switches paths according to the path switching information. In this way, the connection mode switched by the first terminal device can better meet the connection requirements of the first terminal device.
  • connection method preference also known as connection path preference.
  • the connection mode preference can be understood as the preference of the connection mode for connecting the first terminal device to the access network; or it can be understood as the preference of the connection mode for connecting the first terminal device and the access network device; or it can also be understood as the first terminal device and the access network device.
  • connection method preference includes: dual connection of the Uu interface and the PC5 interface; or, single connection of the Uu interface; or single connection of the PC5 interface. In this way, an appropriate connection mode preference can be determined according to the actual connection requirement of the first terminal device.
  • the single connection of the Uu interface means that the first terminal device and the access network device are connected in a connection manner of a single connection of the Uu interface.
  • the single connection of the PC5 interface means that the first terminal device and the relay device are connected in a single connection mode of the PC5 interface, and the relay device is connected to the access network device.
  • a Uu interface connection can be established between the relay device and the access network device.
  • the dual connection of the Uu interface and the PC5 interface means that the first terminal device and the access network device are connected in the connection mode of the Uu interface, and the first terminal device and the access network device are connected in the connection mode of the PC5 interface.
  • the access network device sends path switching information to the first terminal device according to the connection mode preference information, including:
  • connection mode preference is dual connection of the Uu interface and the PC5 interface
  • connection mode currently used between the first terminal device and the access network device is the single connection of the PC5 interface
  • the access network device determines to switch the connection mode between the first terminal device and the access network device to the dual connection of the Uu interface and the PC5 interface
  • the access network device sends the path switching information to the first terminal device, where the path switching information includes first indication information, where the first indication information is used to indicate that the first terminal device establishes a connection with the first terminal device.
  • the Uu interface connection between the access network devices is maintained, and the PC5 interface connection between the first terminal device and the relay device is maintained.
  • the first preset condition may be based on at least one of the following: signal strength, signal quality, or signal-to-noise ratio.
  • the first preset condition may be one of the following:
  • the signal strength of the Uu interface is greater than or equal to the first strength threshold; or the signal strength of the Uu interface is greater than the first strength threshold; or the signal quality of the Uu interface is greater than or equal to the first quality threshold; or the signal quality of the Uu interface is greater than the first quality threshold , or the SNR of the Uu interface is greater than or equal to the first SNR threshold; or the SNR of the Uu interface is greater than the first SNR threshold.
  • the above-mentioned first preset condition may be based on two or three of signal quality, signal strength and signal-to-noise ratio at the same time, which is not limited.
  • the first terminal device when it moves from outside the coverage area of the wireless network to within the coverage area of the wireless network, it can switch to the dual connection of the Uu interface and the PC5 interface according to the first indication information, and can continue the transmission through the PC5 interface.
  • the transmitted service data can also be transmitted by using the Uu interface, which can ensure service continuity. Such a connection mode can meet the needs of services that require high continuity.
  • the access network device determines the connection mode preference information, and sending the path switching information to the first terminal device further includes: the access network device determining, according to the path support capability information of the first terminal device, that the first terminal device supports the Uu interface and PC5 Interface dual connection.
  • the access network device can first determine the dual connection between the Uu interface and the PC5 interface of the first terminal device before instructing the first terminal device to perform dual connection between the Uu interface and the PC5 interface, which can avoid the need for the access network device to communicate with the first terminal device. After sending the first indication information, the first terminal device cannot perform dual connection of the Uu interface and the PC5 interface according to the first indication message.
  • the access network device sends path switching information to the first terminal device according to the connection mode preference information, including:
  • the preferred connection mode is the dual connection of the Uu interface and the PC5 interface
  • the connection mode currently used between the first terminal device and the access network device is the dual connection of the Uu interface and the PC5 interface, and the The signal of the Uu interface of a terminal device satisfies the second preset condition, then the access network device determines to switch the connection mode between the first terminal device and the access network device to PC5 interface single connection;
  • the access network device sends the path switching information to the first terminal equipment, where the path switching information includes second indication information, and the second indication information is used to instruct: the first terminal equipment releases The Uu interface connection between the access network devices is maintained, and the PC5 interface connection between the first terminal device and the relay device is maintained.
  • the second preset condition may be based on at least one of the following: signal strength, signal quality, or signal-to-noise ratio.
  • the second preset condition may be one of the following:
  • the signal strength of the Uu interface is less than or equal to the first strength threshold; or the signal strength of the Uu interface is less than the first strength threshold; or the signal quality of the Uu interface is less than or equal to the first quality threshold; or the signal quality of the Uu interface is less than the first quality threshold , or the SNR of the Uu interface is less than or equal to the first SNR threshold; or the SNR of the Uu interface is less than the first SNR threshold.
  • the second preset condition may be that the signal strength of the Uu interface is less than the first strength threshold; if the first preset condition is that the Uu interface If the signal strength of the interface is greater than the first strength threshold, the second preset condition may be that the signal strength of the Uu interface is less than or equal to the first strength threshold.
  • the second preset condition may be that the signal quality of the Uu interface is less than the first quality threshold; if the first preset condition is that the signal quality of the Uu interface If the quality is greater than the first quality threshold, the second preset condition may be that the signal quality of the Uu interface is less than or equal to the first quality threshold.
  • the second preset condition may be that the SNR of the Uu interface is less than the first SNR threshold; if the preset condition is that the Uu interface The SNR is greater than the first SNR threshold, then the second preset condition may be that the SNR of the Uu interface is less than or equal to the first SNR threshold.
  • the above-mentioned second preset condition may be based on two or three of signal quality, signal strength and signal-to-noise ratio at the same time, and is not limited.
  • the first terminal device when it moves from within the coverage area of the wireless network to outside the coverage area of the wireless network, it can switch the single connection of the PC5 interface according to the second instruction information, which can avoid the weak signal strength of the Uu interface. Data transmission is interrupted, thereby increasing the probability of successful data transmission.
  • the access network device sending the path switching information to the first terminal device according to the connection mode preference information includes:
  • connection mode preference is Uu interface single connection
  • the connection mode currently used between the first terminal device and the access network device is PC5 interface single connection
  • the Uu interface of the first terminal device If the signal meets the first preset condition, the access network device determines to switch the connection mode between the first terminal device and the access network device to Uu interface single connection;
  • the access network device sends the path switching information to the first terminal device, where the path switching information includes third indication information, where the third indication information is used to indicate that the first terminal device establishes a connection with the first terminal device.
  • the Uu interface connection between the access network devices is released, and the PC5 interface connection between the first terminal device and the relay device is released.
  • the first terminal device when it moves from outside the coverage area of the wireless network to the coverage area of the wireless network, it can switch to the Uu interface single connection according to the third indication information, which can improve the data transmission efficiency.
  • Such a connection mode can meet the demand for services with high data transmission efficiency.
  • the access network device sending the path switching information to the first terminal device according to the connection mode preference information includes:
  • connection mode currently used between the first terminal device and the access network device is Uu interface single connection, and the Uu interface of the first terminal device The signal satisfies the second preset condition, then the access network device determines that the connection mode of switching the first terminal device and the access network device is PC5 interface single connection;
  • the access network device sends the path switching information to the first terminal device, where the path switching information includes fourth indication information, where the fourth indication information is used to indicate that the first terminal device establishes a connection with the first terminal device.
  • the PC5 interface connection between the relay devices is released, and the Uu interface connection between the first terminal device and the access network device is released.
  • the first terminal device when it moves from within the coverage area of the wireless network to outside the coverage area of the wireless network, it can switch the single connection of the PC5 interface according to the fourth instruction information, which can avoid the weak signal strength of the Uu interface. Data transmission is interrupted, thereby increasing the probability of successful data transmission.
  • the access network device acquiring the connection mode preference information of the first terminal device includes:
  • the access network device receives the connection mode preference information from a first network device, where the first network device is an access and mobility management function device or a session management device. In this way, the access network device can obtain the connection mode preference information from the first network device.
  • the obtaining, by the access network device, the connection mode preference information of the first terminal device includes: the access network device receiving the connection mode preference information from the first terminal device. In this way, the access network device can obtain the connection mode preference information from the first terminal device.
  • connection mode preference information is carried in the measurement report.
  • the first terminal device sends the connection mode preference information to the access network device by carrying the connection mode preference information in the measurement report, which can save signaling overhead.
  • the first terminal device may send a measurement report to the access network device, where the measurement report includes connection mode preference information.
  • an embodiment of the present application further provides a connection method, including: a first network device acquiring connection mode preference information of a first terminal device, where the connection mode preference information indicates a connection mode preference of the first terminal device; The first network device sends the connection mode preference information to the access network device.
  • the access network device can instruct the first terminal device to switch the connection mode according to the connection mode preference information, so that the connection mode switched by the first terminal device is more in line with the connection requirements of the first terminal.
  • the first network device obtains connection mode preference information of the first terminal device, including:
  • the first network device obtains the connection mode preference information according to the subscription data of the first terminal device.
  • the first network device can obtain the connection mode preference information of the first terminal device from the subscription data of the first terminal device, and send the connection mode preference information to the access device, so that the access network device can The connection mode preference information of the device is sent to the terminal device to send the path switching information.
  • the first network device is an access and mobility management function device, and before the first network device acquires the connection mode preference information of the first terminal device, the method further includes:
  • the access and mobility management function device receives a registration request from the first terminal device, where the registration request includes path support capability information of the first terminal device;
  • the path support capability information indicates that the first terminal device supports one or more of the following: dual connection of the Uu interface and the PC5 interface, single connection of the Uu interface, or single connection of the PC5 interface.
  • the access and mobility management function device can obtain the path support capability information of the first terminal device, and provide the access network device with the path support capability information, so that the access network device can determine the first terminal device according to the path support capability information.
  • the connection capability of a terminal device, and according to the connection capability and connection mode preference of the first terminal device, the first terminal device is instructed to switch the connection mode.
  • an embodiment of the present application also provides a connection method, including:
  • the first terminal device determines the connection method preference
  • the first terminal device sends the connection mode preference information to the access network device, where the connection mode preference information indicates the connection mode preference of the first terminal device.
  • the first terminal device determines the connection mode preference by itself, and sends the connection mode preference information indicating the connection mode preference to the access network device, so that the access network device can indicate the first terminal device according to the connection mode preference determined by the first terminal device.
  • a terminal device switches the connection mode, so that the connection mode of the first terminal device can better meet its own connection requirements.
  • connection mode preference information is carried in the measurement report. This helps reduce signaling overhead.
  • the method further comprises: the first terminal device sending a registration request to the access and mobility management function device, the registration request including the path support capability information of the first terminal device;
  • the path support capability information indicates that the first terminal device supports one or more of the following: dual connection of the Uu interface and the PC5 interface, single connection of the Uu interface, or single connection of the PC5 interface.
  • the access and mobility management function device can obtain the path support capability information of the first terminal device, and provide the access network device with the path support capability information, so that the access network device can determine the first terminal device according to the path support capability information.
  • the connection capability of a terminal device, and according to the connection capability and connection mode preference of the first terminal device, the first terminal device is instructed to switch the connection mode.
  • the determining, by the first terminal device, the connection mode preference information includes: the first terminal device determining the connection mode preference information according to one or more of a business scenario and an expected movement trajectory.
  • the method further includes:
  • the first terminal device switches the connection mode between the first terminal device and the access network device according to the path switching information
  • the path switching information includes first indication information, and the first indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and keeps the first PC5 interface connection between the terminal device and the relay device; or
  • the path switching information includes second indication information, where the second indication information is used to instruct: the first terminal device releases the Uu interface connection with the access network device and keeps the first terminal device connected to the PC5 interface between the relay device; or
  • the path switching information includes third indication information, where the third indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and releases the first terminal device connected to the PC5 interface between the relay device; or
  • the path switching information includes fourth indication information, and the fourth indication information is used to indicate that: the first terminal device establishes a PC5 interface connection with the relay device, and releases the first terminal device from connecting with the relay device. Uu interface connection between the access network devices.
  • an embodiment of the present application provides a connection apparatus, where the connection apparatus may be an access network device, or be deployed in an access network device.
  • the connection device includes a receiving unit and a sending unit;
  • the receiving unit is configured to obtain connection mode preference information of the first terminal device, where the connection mode preference information indicates the connection mode preference of the first terminal device;
  • the sending unit is configured to send path switching information to the first terminal device according to the connection mode preference information, where the path switching information is used to switch the connection mode between the first terminal device and the access network device.
  • the connection device sends path switching information to the first terminal equipment according to the connection mode preference information of the first terminal equipment, and the first terminal equipment switches paths according to the path switching information. In this way, the connection mode switched by the first terminal device can better meet the connection requirements of the first terminal device.
  • connection preference includes: dual connection of Uu interface and PC5 interface; or single connection of Uu interface; or single connection of PC5 interface.
  • the sending unit 802 is specifically configured to: when the connection mode preference is Uu interface and When the PC5 interface is dual-connected, if the connection mode currently used between the first terminal device and the access network device is the PC5 interface single connection, and the signal of the Uu interface of the first terminal device satisfies the first preset condition, then determine to switch the connection mode between the first terminal device and the access network device to the dual connection of the Uu interface and the PC5 interface; and
  • the path switching information includes first indication information
  • the first indication information is used to instruct: the first terminal equipment establishes a connection with the access network equipment.
  • the Uu interface connection between the first terminal device and the relay device is maintained, and the PC5 interface connection between the first terminal device and the relay device is maintained.
  • the connecting apparatus further includes a processor, and the processor is configured to determine, according to the path support capability information of the first terminal device, that the first terminal device supports dual connection of the Uu interface and the PC5 interface.
  • the sending unit is specifically configured to:
  • connection mode is the dual connection of the Uu interface and the PC5 interface
  • connection mode currently used between the first terminal device and the access network device is the dual connection of the Uu interface and the PC5 interface
  • the signal of the Uu interface of a terminal device satisfies the second preset condition, it is determined to switch the connection mode between the first terminal device and the access network device to the single connection of the PC5 interface
  • the path switching information includes second indication information
  • the second indication information is used to instruct: the first terminal equipment releases the connection with the access network equipment.
  • the Uu interface connection between the first terminal device and the relay device is maintained, and the PC5 interface connection between the first terminal device and the relay device is maintained.
  • the sending unit is specifically configured to:
  • connection mode preference is Uu interface single connection
  • the connection mode currently used between the first terminal device and the access network device is PC5 interface single connection
  • the Uu interface of the first terminal device If the signal meets the first preset condition, it is determined to switch the connection mode between the first terminal device and the access network device to the Uu interface single connection
  • the path switching information includes third indication information
  • the third indication information is used to instruct: the first terminal equipment establishes a connection with the access network equipment.
  • the Uu interface connection between the first terminal device and the relay device is released, and the PC5 interface connection between the first terminal device and the relay device is released.
  • the sending unit is specifically configured to:
  • connection mode currently used between the first terminal device and the access network device is Uu interface single connection
  • the Uu interface of the first terminal device The signal satisfies the second preset condition, then it is determined that the connection mode of switching the first terminal device and the access network device is PC5 interface single connection
  • the path switching information includes fourth indication information, where the fourth indication information is used to instruct: the first terminal device establishes a connection between the first terminal device and the relay device connected to the PC5 interface, and release the Uu interface connection between the first terminal device and the access network device.
  • the receiving unit is specifically configured to: receive the connection mode preference information from a first network device, the first network device Device or session management device for access and mobility management functions.
  • the receiving unit is specifically configured to: receive the connection mode preference information from the first terminal device.
  • connection mode preference information is carried in the measurement report.
  • connection method of the embodiment of the present application also use the connection device of the embodiment of the present application, and in order to avoid redundancy, details are not repeated here.
  • connection apparatus may be the first network device, or be deployed in the first network device.
  • the first network device may be, but is not limited to, an access and mobility management device or a session management device.
  • the connection device includes: a receiving unit and a sending unit;
  • the receiving unit is configured to obtain connection mode preference information of the first terminal device, where the connection mode preference information indicates the connection mode preference of the first terminal device;
  • a sending unit configured to send the connection mode preference information to the access network device.
  • the access network device can instruct the first terminal device to switch the connection mode according to the connection mode preference information, so that the connection mode switched by the first terminal device is more in line with the connection requirements of the first terminal.
  • the receiving unit 901 is specifically configured to:
  • the subscription data of the first terminal device is acquired, and the connection mode preference information is obtained according to the subscription data of the first terminal device.
  • the receiving unit is further configured to:
  • the path support capability information indicates that the first terminal device supports one or more of the following: dual connection of the Uu interface and the PC5 interface, single connection of the Uu interface, or single connection of the PC5 interface.
  • connection method of the embodiment of the present application also use the connection device of the embodiment of the present application, and in order to avoid redundancy, details are not repeated here.
  • an embodiment of the present application further provides a connection device.
  • the connection apparatus may be the first terminal device, or be deployed in the first terminal device.
  • the connection device includes a processing unit and a sending unit,
  • the processing unit is used to determine the connection method preference
  • the sending unit is configured to send the connection mode preference information to the access network device, where the connection mode preference information indicates the connection mode preference of the first terminal device.
  • the first terminal device determines the connection mode preference by itself, and sends the connection mode preference information indicating the connection mode preference to the access network device, so that the access network device can indicate the first terminal device according to the connection mode preference determined by the first terminal device.
  • a terminal device switches the connection mode, so that the connection mode of the first terminal device can better meet its own connection requirements.
  • connection mode preference information is carried in a measurement report or a registration request.
  • the sending unit is also used for:
  • the path support capability information indicates that the first terminal device supports one or more of the following: dual connection of the Uu interface and the PC5 interface, single connection of the Uu interface, or single connection of the PC5 interface.
  • the processing unit 1001 is specifically configured to: determine the connection mode preference information according to one or more of a business scenario and an expected movement trajectory.
  • connection device further comprises:
  • a receiving unit configured to receive path switching information from the access network device
  • the processing unit is further configured to switch the connection mode between the first terminal device and the access network device according to the path switching information
  • the path switching information includes first indication information, where the first indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and keeps the first terminal device connected to the PC5 interface between the relay device; or
  • the path switching information includes second indication information, where the second indication information is used to instruct: the first terminal device releases the Uu interface connection with the access network device and keeps the first terminal device connected to the PC5 interface between the relay device; or
  • the path switching information includes third indication information, where the third indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and releases the first terminal device connected to the PC5 interface between the relay device; or
  • the path switching information includes fourth indication information, and the fourth indication information is used to indicate that: the first terminal device establishes a PC5 interface connection with the relay device, and releases the first terminal device from connecting with the relay device. Uu interface connection between the access network devices.
  • connection method of the embodiment of the present application also use the connection device of the embodiment of the present application, and in order to avoid redundancy, details are not repeated here.
  • the present application provides a communication device, the communication device includes a processor, the processor is coupled to a memory, and when the processor executes a computer program or an instruction in the memory, the method of any one of the embodiments of the first aspect is executed. .
  • the apparatus further includes a memory.
  • the apparatus further includes a communication interface to which the processor is coupled.
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • the transceiver may include a transmitter (transmitter) and a receiver (receiver).
  • the communication device is a first terminal device, an access network network device, or a first network device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the communication device is a chip or a system of chips.
  • the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, etc. on the chip or a chip system.
  • a processor may also be embodied as a processing circuit or a logic circuit.
  • the present application provides a communication system, where the communication system includes the connection device of the fourth aspect, the connection device of the fifth aspect, and the connection device of the sixth aspect; or, the communication system includes the above-mentioned first terminal device, An access network network device, and a first network device.
  • the present application provides a computer program product.
  • the computer program product includes: a computer program (also referred to as code, or instruction), which, when the computer program is executed, causes the computer to execute the above-mentioned first aspect and the above-mentioned second aspect. Aspect or the method in any of the possible implementations of the third aspect above.
  • the present application provides a computer-readable storage medium, where the computer-readable medium stores a computer program (also referred to as code, or instruction) when it runs on a computer, so that the computer executes the above-mentioned first aspect,
  • a computer program also referred to as code, or instruction
  • the present application further provides a chip, including: a processor and an interface, configured to execute a computer program or instruction stored in a memory, to execute any of the possible implementations of the first aspect to the third aspect. method.
  • 1A is a schematic diagram of a network architecture
  • 1B is a schematic diagram of another network architecture
  • 2A is an architecture diagram of a communication system
  • 2B is an architecture diagram of another communication system
  • 3A is a schematic flowchart of a connection method according to an embodiment of the present application.
  • 3B is another schematic flowchart of a connection method according to an embodiment of the present application.
  • FIG. 3C is another schematic flowchart of the connection method according to an embodiment of the present application.
  • 3D is another schematic flowchart of a connection method according to an embodiment of the present application.
  • 3E is another schematic flowchart of a connection method according to an embodiment of the present application.
  • 3F is another schematic flowchart of the connection method according to the embodiment of the present application.
  • 3G is another schematic flowchart of a connection method according to an embodiment of the present application.
  • 4A is a schematic diagram of a scenario involved in a connection method according to an embodiment of the present application.
  • 4B is a schematic diagram of another scenario involved in the connection method according to the embodiment of the present application.
  • 4C is a schematic diagram of another scenario involved in the connection method according to the embodiment of the present application.
  • FIG. 4D is a schematic diagram of another scenario involved in the connection method according to the embodiment of the present application.
  • 4E is a schematic diagram of another scenario involved in the connection method according to the embodiment of the present application.
  • 5A is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 5B is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 5C is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 6A is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 6B is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 6C is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 6D is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 6E is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 6F is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 6G is a schematic flowchart of a connection method according to another embodiment of the present application.
  • FIG. 7A is a schematic flowchart of a connection method according to another embodiment of the present application.
  • FIG. 7B is a schematic flowchart of a connection method according to another embodiment of the present application.
  • FIG. 7C is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 7D is a schematic flowchart of a connection method according to another embodiment of the present application.
  • 7E is a schematic flowchart of a connection method according to another embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a connection method according to another embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a connection method according to another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a connecting device according to an embodiment of the present application.
  • connection device 11 is a schematic structural diagram of another connection device according to an embodiment of the present application.
  • connection device 12 is a schematic structural diagram of another connection device according to an embodiment of the application.
  • FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the application.
  • FIG. 14 is a schematic structural diagram of a chip according to an embodiment of the application.
  • 15 is a schematic structural diagram of a communication system according to an embodiment of the application.
  • FIG. 16 is another schematic structural diagram of a communication system according to an embodiment of the present application.
  • first and second are only used for descriptive purposes, and should not be construed as implying or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature.
  • plural means two or more.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems. For example: enhanced long term evolution (enhanced-long term evolution, eLTE) system, fifth generation (5th generation, 5G) system or new radio (new radio, NR), etc.
  • the 5G mobile communication system involved in this application includes non-standalone A 5G mobile communication system of a non-standalone (NSA) network or a 5G mobile communication system of an independent network (standalone, SA).
  • the technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system.
  • the communication system may also be a public land mobile network (PLMN) network, a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an object Internet of Things (IoT) communication system or other communication system.
  • PLMN public land mobile network
  • D2D device-to-device
  • M2M machine-to-machine
  • IoT object Internet of Things
  • FIG. 2A is an architecture diagram of a communication system.
  • the communication system includes an access network device, a first terminal device (which may be referred to as a remote device) and a relay device.
  • the communication system may further include an access and mobility management function (access and mobility management function, AMF) device, and a session management function (session management function, SMF) device.
  • AMF access and mobility management function
  • SMF session management function
  • the AMF device is abbreviated as AMF
  • the SMF device is abbreviated as SMF.
  • FIG. 2B is an architecture diagram of another communication system, and the communication system may be a reference point-based non-roaming architecture of a fifth-generation mobile communication network.
  • the communication system of the embodiment of the present application can be used in, but not limited to, the reference point-based non-roaming architecture of the fifth-generation mobile communication network as shown in FIG. 2B .
  • the communication network mainly includes AMF, SMF, user plane function (user plane function, UPF) equipment and unified data management (unified data management, UDM) equipment.
  • the communication network may further include a policy control function (policy control function, PCF) device and a data network (data network, DN).
  • policy control function policy control function
  • PCF policy control function
  • the UPF device is abbreviated as UPF
  • the PCF device is abbreviated as PCF
  • the UDM device is abbreviated as UDM.
  • the foregoing devices and network elements may communicate directly, or may communicate through forwarding by other devices or network elements, which is not specifically limited in this embodiment of the present application.
  • the communication system may further include other network elements, which are not specifically limited in this embodiment of the present application.
  • the first terminal device and/or the relay device in this embodiment of the present application is a terminal device.
  • the first terminal device and/or relay device in this embodiment of the present application may refer to an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a relay station, a remote station, a remote terminal, a mobile device, or a user terminal (user terminal) ), user equipment (UE), terminal (terminal), wireless communication equipment, user agent, user equipment, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (wireless) local loop, WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, in future 5G networks
  • the terminal or the terminal in the future evolved PLMN or the terminal in the future Internet of Vehicles, etc. are not limited in this embodiment of the present application.
  • the first terminal device and/or the relay device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality terminal, an augmented reality terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, and a remote operation.
  • the first terminal device and the relay device may be the same type of terminal device, or may be different terminal devices.
  • the first terminal device may be a mobile phone
  • the relay device may be a wireless terminal in an unmanned driving.
  • both the first terminal device and/or the relay device may be wireless terminals in unmanned driving.
  • a wearable device may also be referred to as a wearable smart device, which is a general term for intelligently designing daily wearable devices and developing wearable devices using wearable technology, such as glasses, Gloves, watches, clothing and shoes, etc.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • the first terminal device and/or the relay device may also be a terminal in an Internet of things (Internet of things, IoT) system.
  • IoT Internet of things
  • IoT is an important part of future information technology development, and its main technology It is characterized by connecting items to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and interconnection of things.
  • the IOT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, a narrow band (narrow band, NB) technology.
  • NB narrow band
  • the first terminal device and/or the relay device may also include sensors such as smart printers, train detectors, and gas stations, and the main functions include collecting data (part of terminals), receiving Control information and downlink data, and send electromagnetic waves to transmit uplink data to access network equipment.
  • sensors such as smart printers, train detectors, and gas stations
  • the main functions include collecting data (part of terminals), receiving Control information and downlink data, and send electromagnetic waves to transmit uplink data to access network equipment.
  • the relay device is a terminal device within the service range of the access network device, and the relay device can be connected to the access network device through a Uu interface.
  • the first terminal device may be a terminal device within the service range of the access network device, or may be a terminal device not within the service range of the access network device.
  • the access network device in this embodiment of the present application is any communication device with a wireless transceiver function that is used to communicate with a terminal.
  • the access network equipment includes but is not limited to: evolved node B (evolved node B, eNB), baseband unit (baseband unit, BBU), access point (access point, wireless fidelity, WIFI) system AP), wireless relay node, wireless backhaul node, transmission point (TP) or transmission reception point (TRP), etc.
  • the access network device may also be a gNB or TRP or TP in the 5G system, or one or a group (including multiple antenna panels) antenna panels of a base station in the 5G system.
  • the access network device may also be a network node that constitutes a gNB or a TP, such as a BBU, or a distributed unit (distributed unit, DU).
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (active antenna unit, AAU).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and implementing functions of radio resource control (RRC) and packet data convergence protocol (PDCP) layers.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical layer (PHY).
  • RLC radio link control
  • MAC media access control
  • PHY physical layer
  • AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas.
  • the access network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the access network device and the terminal device in the embodiment of the present application may communicate through licensed spectrum, may also communicate through unlicensed spectrum, or may communicate through licensed spectrum and unlicensed spectrum at the same time.
  • the access network equipment and the terminal can communicate through the frequency spectrum below 6 GHz (gigahertz, GHz), can also communicate through the frequency spectrum above 6 GHz, and can also use the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz for communication at the same time.
  • the embodiments of the present application do not limit the spectrum resources used between the access network device and the terminal device.
  • the first terminal device, relay device, or access network device mentioned in the embodiments of this application may be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it may also be deployed on water; it may also be deployed On planes, balloons and satellites in the air.
  • the embodiments of the present application do not limit the application scenarios of the first terminal device, the relay device, or the access network device.
  • the first terminal device, the relay device or the access network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • This hardware layer includes hardware such as central processing unit (CPU), memory management unit (MMU), and memory (also called main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the present application do not specifically limit the specific structure of the execution body of the methods provided by the embodiments of the present application, as long as the program that records the codes of the methods provided by the embodiments of the present application can be executed to provide the methods provided by the embodiments of the present application.
  • the execution subject of the method provided in this embodiment of the present application may be a first terminal device, a relay device, or an access network device, or, a first terminal device, a relay device, or an access network device.
  • the related functions of the first terminal device, the relay device, or the access network device in this embodiment of the present application may be implemented by one device, or jointly implemented by multiple devices, or may be implemented by one or more devices in one device.
  • Each functional module is implemented, which is not specifically limited in this embodiment of the present application. It is to be understood that the above-mentioned functions can be either network elements in hardware devices, or software functions running on dedicated hardware, or a combination of hardware and software, or instantiated on a platform (eg, a cloud platform). Virtualization capabilities.
  • the AMF is mainly responsible for the processing of signaling, such as: access control, mobility management, attach and detach, and gateway selection.
  • the AMF entity provides services for the session in the terminal, it provides storage resources of the control plane for the session to store the session ID, the SMF entity ID associated with the session ID, and the like.
  • SMF is mainly responsible for session management, selection of user plane functional entities, redirection of user plane functional entities, Internet Protocol (IP) address allocation, bearer establishment, modification and release, and quality of service (QoS) control etc.
  • IP Internet Protocol
  • QoS quality of service
  • UDM is mainly used to manage user subscription data.
  • UPF is used to process user packets, such as forwarding and accounting.
  • PCF is used to provide policies to AMF and SMF, such as QoS policy, slice selection policy, etc.
  • a DN is an operator network that provides data transmission services to users.
  • connection method As shown in the schematic flowchart of FIG. 3A , the present application provides a connection method, as described below.
  • the access network device acquires connection mode preference information of the first terminal device.
  • the first terminal device may be called a remote device, that is, a device that can communicate with an access network device through a relay device.
  • the relay device can be, but is not limited to, a relay terminal device.
  • the relay device is connected to the access network device.
  • the connection mode preference information may indicate the connection mode preference of the first terminal device.
  • connection method preference may also be referred to as the connection path preference.
  • the connection method preference can be understood as the connection method or the connection path preference or preference for connecting the first terminal device to the access network; or it can be understood as the preferred connection method for the connection between the first terminal device and the access network device; or it can also be understood Therefore, the first terminal device is allowed to connect to the connection mode of the access network device.
  • connection method preference may include one or more of: dual connection of the Uu interface and the PC5 interface, single connection of the Uu interface, or single connection of the PC5 interface.
  • the single connection of the Uu interface may mean that the first terminal device is only connected to the access network device through the connection mode of the Uu interface.
  • the single connection of the PC5 interface may mean that the first terminal device is only connected to the access network device through the relay device in the connection mode of the PC5 interface. That is, the first terminal device is connected with the relay device in the connection mode of the PC5 interface, and the relay device is connected with the access network device, thereby realizing the connection between the first terminal device and the access network device.
  • a Uu interface connection can be established between the relay device and the access network device.
  • the dual connection of the Uu interface and the PC5 interface may mean that the first terminal device is connected to the access network device in the connection mode of the Uu interface, and the first terminal device is also connected to the access network device in the connection mode of the PC5 interface.
  • the preference for the connection mode to be the dual connection of the Uu interface and the PC5 interface may mean that when the signal of the Uu interface of the first terminal device satisfies the first preset condition, the first terminal device prefers to: communicate with the access network device through the Uu interface Connect and maintain the PC5 interface with the relay device that is connected to the access network device. Furthermore, it is realized that the first terminal device is not only connected to the access network device through the relay device, but also connected to the access network device through the Uu interface.
  • the preference for the connection mode to be Uu interface single connection may refer to: when the signal of the Uu interface of the first terminal device satisfies the first preset condition, the first terminal device prefers: the connection mode and access through the Uu interface single connection network device connection.
  • the preference for the connection mode to be PC5 interface single connection may mean: no matter whether the signal strength of the Uu interface of the first terminal device meets the signal strength requirements of the Uu interface, the first terminal device prefers (or maintains, or preferentially uses): only It is connected to the relay device through the PC5 interface, wherein the relay device is connected to the access network device. Further, it is realized that the first terminal device is connected to the access network device through the relay device.
  • the first preset condition may be based on at least one of the following: signal strength, signal quality, or signal-to-noise ratio.
  • the first preset condition may be one of the following:
  • the signal strength of the Uu interface is greater than or equal to the first strength threshold; or the signal strength of the Uu interface is greater than the first strength threshold; or the signal quality of the Uu interface is greater than or equal to the first quality threshold; or the signal quality of the Uu interface is greater than the first quality threshold , or the SNR of the Uu interface is greater than or equal to the first SNR threshold; or the SNR of the Uu interface is greater than the first SNR threshold.
  • the above-mentioned first preset condition may be based on two or three of signal quality, signal strength and signal-to-noise ratio at the same time, which is not limited.
  • the access network device sends path switching information to the first terminal device according to the connection mode preference information.
  • the path switching information may be used to switch the connection mode between the first terminal device and the access network device.
  • the path switching information in this application may be the target connection mode between the first terminal device and the access network device, that is, the connection mode between the first terminal device and the access network device to be switched to.
  • the target connection mode may be, for example, one of Uu interface and PC5 interface dual connection, Uu interface single connection or PC5 interface single connection.
  • the path switching information in this application may also be instruction information used to instruct the first terminal device to perform a specific action. For example, releasing a connection, maintaining a connection, establishing a connection, etc., the connection may vary according to different connection methods, and may specifically be a PC5 interface connection and a Uu interface connection.
  • the access network device sends path switching information to the first terminal device according to the connection mode preference indicated by the connection mode preference information and the current connection mode of the first terminal device.
  • the access network device may send the path switching information to the first terminal device , to instruct the first terminal device to connect with the access network device through the connection mode corresponding to the connection mode preference, or instruct the first terminal to switch the connection mode between it and the access network device to the connection mode corresponding to the connection mode preference.
  • the access network device may send the path switching information to the first terminal device , to instruct the first terminal device to connect with the access network device through the connection mode corresponding to the connection mode preference, or instruct the first terminal to switch the connection mode between it and the access network device to the connection mode corresponding to the connection mode preference.
  • the access network device may also send the first terminal device a Path switching information to instruct the first terminal device to switch to connect with the access network device through other connection methods.
  • the other connection manner may refer to a connection manner different from the connection manner corresponding to the connection manner preference. In this way, the stability of the connection between the first terminal device and the access network device can be ensured, and the probability of successful data transmission can be ensured.
  • the access network device may not send the path switch to the first terminal device. information.
  • the connection mode preference is different from the current connection mode of the first terminal device, but the signal strength of the interface corresponding to the connection mode preference does not meet the corresponding signal strength requirements, the access network device may not send the path to the first terminal device. Toggle information. In this way, the connection mode of the first terminal device is kept unchanged, thereby ensuring the continuity of data transmission between the first terminal device and the access network device, thereby helping to ensure service continuity.
  • connection mode of the first terminal device mentioned in the embodiments of this application can be understood as the connection mode of the connection between the first terminal device and the access network device.
  • the access network device sends path switching information to the first terminal device according to the connection mode preference information of the first terminal device, and the first terminal device switches paths according to the path switching information. In this way, the connection mode switched by the first terminal device can better meet the connection requirements of the first terminal device.
  • the access network device obtains the connection mode preference information of the first terminal device from the first network device, and may also obtain the connection mode of the first terminal device from the first terminal device Mode preference information.
  • the first network device may be AMF or SMF.
  • step 301 includes:
  • the access network device receives the connection mode preference information of the first terminal device from the first network device.
  • the first network device may be AMF, SMF or other network devices.
  • the access network device may receive the connection mode preference information of the first terminal device from the AMF.
  • the AMF can obtain the subscription data of the first terminal device from the UDM, and obtain the connection mode preference information of the first terminal device from the subscription data of the first terminal device, and then the AMF sends the first terminal device's subscription data to the access network device. Connection method preference information.
  • the access network device may receive the connection mode preference information of the first terminal device from the SMF.
  • the SMF may obtain the subscription data of the first terminal device from the UDM, and obtain the connection mode preference information of the first terminal device from the subscription data of the first terminal device, and then the SMF sends the first terminal device's subscription data to the access network device. Connection method preference information.
  • the subscription data of the first terminal device may include a connection indicator (connectivity indicator), which is used to indicate the connection mode preference of the first terminal device.
  • the first network device may send the connection mode preference information of the first terminal device to the access network device according to the connection indication in the subscription data of the first terminal device.
  • connection indication in the subscription data of the first terminal device is a dual connectivity indicator (dual connectivity indicator).
  • the dual connection indication is used to indicate that the connection mode preference of the first terminal device is dual connection of the Uu interface and the PC5 interface.
  • the first network device may send the connection mode preference information of the first terminal device to the access network device according to the dual connection instruction, where the connection mode preference information is used to indicate dual connection of the Uu interface and the PC5 interface.
  • connection indication in the subscription data of the first terminal device is a PC5 preference indicator (PC5 preference indicator).
  • the PC5 preference indication is used to indicate that the connection mode preference of the first terminal device is PC5 interface single connection.
  • the first network device may send connection mode preference information of the first terminal device to the access network device according to the PC5 preference indication, where the connection mode preference information indicates that the PC5 interface is single-connected.
  • connection indication in the subscription data of the first terminal device is a Uu preference indicator (Uu preference indicator).
  • Uu preference indication is used to indicate that the connection mode preference of the first terminal device is Uu interface single connection.
  • the first network device may send the connection mode preference information of the first terminal device to the access network device according to the Uu preference indication, where the connection mode preference information indicates that the Uu interface is single-connected.
  • the access network device acquires connection mode preference information from the first terminal device.
  • step 301 includes:
  • the access network device receives the connection mode preference information from the first terminal device.
  • the first terminal device reports the connection mode preference information to the access network device, so that the access network device can instruct the first terminal device to switch the connection mode according to the connection mode preference information reported by the first terminal device, so that the first terminal device can switch the connection mode.
  • the switching connection mode is more in line with the connection requirements of the first terminal device.
  • connection mode preference information is carried in the measurement report.
  • the first terminal device sends the connection mode preference information to the access network device by carrying the connection mode preference information in the measurement report, which can save signaling overhead.
  • the first terminal device may send a measurement report to the access network device, where the measurement report includes connection mode preference information.
  • step 302 the embodiments of the present application provide the following possible implementation manners.
  • connection mode preference indicated by the connection mode preference information is the dual connection of the Uu interface and the PC5 interface.
  • step 302 may include:
  • connection mode preference is dual connection of the Uu interface and the PC5 interface
  • the connection mode currently used between the first terminal device and the access network device is the single connection of the PC5 interface
  • the signal of the Uu interface of the first terminal device satisfies In the first preset condition
  • the access network device determines to switch the connection mode between the first terminal device and the access network device to dual connection of the Uu interface and the PC5 interface.
  • the access network device sends path switching information to the first terminal device.
  • the path switching information may include first indication information; the first indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and maintains the connection between the first terminal device and the relay device Alternatively, the path information may also be the target connection mode between the first terminal device and the access network device, and the target connection mode is the dual connection of the Uu interface and the PC5 interface.
  • the retention mentioned in this application may also refer to not releasing, which is not limited.
  • maintaining the PC5 interface connection between the first terminal device and the relay device can be understood as not releasing the PC5 interface connection between the first terminal device and the relay device.
  • the first terminal device may send the first indication information to the first terminal device.
  • the first terminal device switches the connection mode to the dual connection of the Uu interface and the PC5 interface according to the first indication information, so that the first terminal device can not only continue to transmit the uncompleted transmission service data through the PC5 interface, but also use the PC5 interface.
  • the Uu interface transmits data to ensure business continuity. Such a connection mode can meet the needs of services that require high continuity.
  • the access network device sends path switching information to the first terminal device.
  • step 302 further includes:
  • the access network device determines, according to the path support capability information of the first terminal device, that the first terminal device supports dual connection of the Uu interface and the PC5 interface.
  • the path support capability information of the first terminal device may indicate a connection mode supported by the first terminal device.
  • the access network device first determines whether the first terminal device supports the dual connection between the Uu interface and the PC5 interface. After the terminal device sends the first indication information, the first terminal device cannot perform dual connection of the Uu interface and the PC5 interface according to the first indication message.
  • connection mode preference information includes path support capability information, or the connection mode preference information and the path support capability information may be the same information. That is, the connection mode preference information indicates the connection mode preference of the first terminal device, and also indicates the connection mode supported by the first terminal device. In other words, the connection mode preference refers to the connection capability supported by the first terminal device.
  • the connection mode preference information does not include path support capability information.
  • the access network device may acquire the path support capability information of the first terminal device.
  • the access network device may acquire the path support capability information from the first terminal device or the first network device.
  • the access network device acquires the path support capability information from the first terminal device.
  • the path support capability information may be carried in a measurement report sent by the first terminal device to the access network device. This can save signaling overhead.
  • the access network device acquires path support capability information from the first network device.
  • the first terminal device may carry path support capability information in the registration request, and the path support capability information is forwarded to a database storing user subscription data via the access network device.
  • the first network device may be a core network device, for example, AMF or SMF, which is not limited.
  • the first network device may obtain the path support capability information from subscription data of the first terminal device.
  • the first network device may acquire the subscription data of the first terminal device from a database storing user subscription data.
  • the subscription data includes path support capability information of the first terminal device.
  • the first network device obtains the path support capability information from the subscription data.
  • the database for storing user subscription data may be UDM or a home subscription server (home subscribe server, HSS), which is not limited.
  • the access network device sends the path switching information in step 3022 to the first terminal device.
  • connection mode preference indicated by the connection mode preference information is the dual connection of the Uu interface and the PC5 interface.
  • step 302 may include:
  • connection mode preference is dual connection of the Uu interface and the PC5 interface
  • connection mode currently used between the first terminal device and the access network device is the dual connection of the Uu interface and the PC5 interface, and the Uu interface of the first terminal device If the signal satisfies the second preset condition, the access network device determines to switch the connection mode between the first terminal device and the access network device to PC5 interface single connection.
  • the second preset condition may be based on at least one of the following: signal strength, signal quality, or signal-to-noise ratio.
  • the second preset condition may be one of the following:
  • the signal strength of the Uu interface is less than or equal to the first strength threshold; or the signal strength of the Uu interface is less than the first strength threshold; or the signal quality of the Uu interface is less than or equal to the first quality threshold; or the signal quality of the Uu interface is less than the first quality threshold , or the SNR of the Uu interface is less than or equal to the first SNR threshold; or the SNR of the Uu interface is less than the first SNR threshold.
  • the second preset condition may be that the signal strength of the Uu interface is less than the first strength threshold; if the first preset condition is that the Uu interface If the signal strength of the interface is greater than the first strength threshold, the second preset condition may be that the signal strength of the Uu interface is less than or equal to the first strength threshold.
  • the second preset condition may be that the signal quality of the Uu interface is less than the first quality threshold; if the first preset condition is that the signal quality of the Uu interface If the quality is greater than the first quality threshold, the second preset condition may be that the signal quality of the Uu interface is less than or equal to the first quality threshold.
  • the second preset condition may be that the SNR of the Uu interface is less than the first SNR threshold; if the preset condition is that the Uu interface The SNR is greater than the first SNR threshold, then the second preset condition may be that the SNR of the Uu interface is less than or equal to the first SNR threshold.
  • the above-mentioned second preset condition may be based on two or three of signal quality, signal strength and signal-to-noise ratio at the same time, and is not limited.
  • the access network device sends path switching information to the first terminal device.
  • the path switching information may include second indication information.
  • the second indication information is used to instruct: the first terminal device releases the Uu interface connection with the access network device, and maintains the PC5 interface connection between the first terminal device and the relay device.
  • the path information may also be a target connection mode between the first terminal device and the access network device, and the target connection mode is a PC5 interface single connection.
  • the access network device may send the second indication information to the first terminal device.
  • the first terminal device switches to the single connection of the PC5 interface according to the second indication information (specifically, the first terminal device releases the Uu interface connection with the access network device, and keeps the first terminal device and the relay
  • the PC5 interface connection between the devices can avoid the interruption of data transmission due to the weak signal strength of the Uu interface, thereby improving the probability of successful data transmission.
  • steps 3021-3023 and steps 3024-3025 may be implemented in the same embodiment, or only steps 3021-3023 may be implemented in one embodiment, or only steps 3024-3025 may be implemented in one embodiment.
  • steps 3024 and 3035 can be combined as:
  • connection mode preference is dual connection of Uu interface and PC5 interface
  • connection mode currently used between the first terminal device and the access network device is dual connection of Uu interface and PC5 interface
  • signal of the Uu interface of the first terminal device If the second preset condition is satisfied, the access network device sends the path switching information in step 3025 to the first terminal device.
  • the path support capability information of the first terminal device may also be combined, and reference may be made to the relevant description of the above step 3023.
  • the preferred connection method is the dual connection of the Uu interface and the PC5 interface
  • the first terminal device supports the single connection of the PC5 interface
  • the connection method currently used between the first terminal device and the access network device is the Uu interface and the PC5 interface Dual connection
  • the signal of the Uu interface of the first terminal device satisfies the second preset condition
  • the access network device sends the path switching information in step 3025 to the first terminal device.
  • step 302 may include:
  • connection mode preference is Uu interface single connection
  • the connection mode currently used between the first terminal device and the access network device is PC5 interface single connection
  • the signal of the Uu interface of the first terminal device satisfies the first preset. If the conditions are set, the access network device determines to switch the connection mode between the first terminal device and the access network device to Uu interface single connection.
  • the access network device sends path switching information to the first terminal device.
  • the path switching information may include third indication information; the third indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and releases the connection between the first terminal device and the relay device Alternatively, the path information may also be a target connection mode between the first terminal device and the access network device, and the target connection mode is a Uu interface single connection.
  • the access network device sends the third indication information to the first terminal device.
  • the first terminal device switches to the Uu interface single connection according to the third indication information (specifically, the first terminal device establishes a Uu interface connection with the access network device, and releases the first terminal device and the relay PC5 interface connection between devices), which can improve the data transmission efficiency.
  • the connection mode can meet the demand for services with high data transmission efficiency.
  • step 3026 and step 3027 can be combined into:
  • connection mode preference is Uu interface single connection
  • the access network device sends the path switching information in step 3207 to the first terminal device.
  • the path support capability information of the first terminal device may also be combined, and reference may be made to the relevant description of the above step 3023.
  • the connection mode preference is Uu interface single connection
  • the first terminal device supports Uu interface single connection
  • the connection mode currently used between the first terminal device and the access network device is PC5 interface single connection
  • the access network device sends the path switching information in step 3027 to the first terminal device.
  • connection mode preference indicated by the connection mode preference information is the Uu interface single connection.
  • step 302 may include:
  • connection mode preference is Uu interface single connection
  • the connection mode currently used between the first terminal device and the access network device is Uu interface single connection
  • the signal of the Uu interface of the first terminal device satisfies the second preset. If the conditions are set, the access network device determines that the connection mode of switching the first terminal device and the access network device is PC5 interface single connection.
  • the access network device sends path switching information to the first terminal device.
  • the path switching information may include fourth indication information; the fourth indication information is used to indicate that: the first terminal device establishes a PC5 interface connection with the relay device, and releases the connection between the first terminal device and the access network device Uu interface connection.
  • the path switching information may also be a target connection mode between the first terminal device and the access network device, and the target connection mode is a PC5 interface single connection.
  • the access network device sends fourth indication information to the first terminal device.
  • the first terminal device switches to the PC5 interface single connection according to the fourth indication information (specifically, the first terminal device releases the Uu interface connection with the access network device, and establishes a connection with the relay device.
  • PC5 interface connection which can avoid the interruption of data transmission due to the weak signal strength of the Uu interface, and improve the probability of successful data transmission.
  • step 3028 and step 3029 may be combined into:
  • connection mode preference is Uu interface single connection
  • the access network device sends the path switching information in step 3029 to the first terminal device.
  • the path support capability information of the first terminal device may also be combined, and reference may be made to the relevant description of the above step 3023.
  • the access network device sends the path switching information in step 3029 to the first terminal device.
  • FIG. 3B to FIG. 3G may be implemented separately; the embodiment corresponding to FIG. 3B or one of the embodiments corresponding to FIG. 3C may also be the same as the embodiment of FIG. 3D to FIG. 3G Any one of the corresponding embodiments is implemented in combination.
  • connection mode preference indicated by the connection mode preference information is PC5 interface single connection
  • the access network device determines that the first terminal device maintains the PC5 interface connection and does not need to switch the connection mode, and the access network device does not send path switching information.
  • the connection mode of the first terminal device and the network device is the single connection of the PC5 interface.
  • the single connection of the PC5 interface is maintained, and the service data can always be transmitted through the PC5 interface during the movement of the first terminal device.
  • an embodiment of the present application further provides a connection method, as follows.
  • the first network device acquires connection mode preference information of the first terminal device.
  • connection mode preference information indicates the connection mode preference of the first terminal device.
  • connection mode preference information indicates that the connection mode preference of the first terminal device is Uu interface and PC5 interface dual connection; or the connection mode preference of the first terminal device is Uu interface single connection, or the connection mode preference of the first terminal device is indicated Single connection for PC5 interface.
  • connection mode preference in the foregoing embodiment are also applicable to this embodiment, and are not repeated here.
  • the first network device may be a core network device, such as AMF or SMF, which is not limited.
  • the first network device may obtain the connection mode preference information from the subscription data of the first terminal device.
  • the first network device obtains the subscription data of the first terminal device.
  • the first network device sends connection mode preference information to the access network device.
  • connection mode preference information may be carried in a context transfer message.
  • the first network device may send a context transfer message to the access network device, where the context transfer message includes connection mode preference information. Helps to save signaling overhead.
  • the access network device can instruct the first terminal device to switch the connection mode according to the connection mode preference information sent by the first network device, so that the connection mode switched by the first terminal device is more in line with the connection requirements of the first terminal .
  • step 501 includes:
  • the first network device acquires subscription data of the first terminal device.
  • the first network device obtains connection mode preference information according to the subscription data of the first terminal device.
  • connection mode preference information by the first network device according to the subscription data of the first terminal device may refer to the foregoing embodiments, which will not be repeated here.
  • the first network device can obtain the connection mode preference information of the first terminal device, and send the connection mode preference information to the access network device, so that the access network device can send the connection mode preference information to the first terminal device according to the connection mode preference information.
  • Send path switching information
  • the first network device is an AMF
  • the connection method may further include:
  • the AMF receives a registration request from the first terminal device.
  • the registration request includes path support capability information of the first terminal device, and the path support capability information indicates that the first terminal device supports one or more of the following: dual connection of Uu interface and PC5 interface, single connection of Uu interface, or single connection of PC5 interface .
  • the registration request may be sent by the first terminal device to the access network device, and then forwarded to the AMF by the access network device.
  • the first terminal device carries the path support capability information in the registration request, so as to report the path support capability information to the AMF, so that the access network device can obtain the path support capability information from the AMF.
  • FIG. 5B and the embodiment corresponding to FIG. 5C may be implemented in combination, or may be implemented independently, which is not limited in this application.
  • an embodiment of the present application further provides a connection method, as follows.
  • the first terminal device determines a connection mode preference.
  • the first terminal device may determine the connection mode preference according to one or more of the service scenario and the expected movement trajectory.
  • the first terminal device may determine that the connection mode preference is dual connection of the Uu interface and the PC5 interface.
  • the first terminal device may determine that the connection mode preference is Uu interface single connection.
  • the first terminal device may determine that the connection mode preference is PC5 interface single connection.
  • the first terminal device sends connection mode preference information to the access network device, where the connection mode preference information indicates the connection mode preference of the first terminal device.
  • connection mode preference information indicates that the connection mode preference of the first terminal device is dual connection of Uu interface and PC5 interface; or indicates that the connection mode preference of the first terminal device is Uu interface single connection, or the connection mode preference of the first terminal device is PC5 Interface single connection.
  • connection method preference information can be carried in the measurement report.
  • the first terminal device sends a measurement report to the access network device, where the measurement report includes connection mode preference information.
  • the measurement report further includes the signal strength of the Uu interface of the first terminal device.
  • the first terminal device determines the connection mode preference by itself, and carries the connection mode preference information in the measurement report, so that the access network device can instruct the first terminal device to switch the connection mode according to the connection mode preference determined by the first terminal device. Therefore, the connection mode of the first terminal device can better meet its own connection requirements.
  • connection method further includes:
  • the first terminal device receives path switching information from the access network device.
  • the path switching information may be used to switch the connection mode between the first terminal device and the access network device.
  • the first terminal device switches the connection mode between the first terminal device and the access network device according to the path switching information
  • the path switching information includes indication information.
  • the path switching information includes first indication information, and the first indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and maintains the connection between the first terminal device and the relay device. PC5 interface connection; or
  • the path switching information includes second indication information, where the second indication information is used to instruct: the first terminal device releases the Uu interface connection with the access network device, and maintains the PC5 interface connection between the first terminal device and the relay device ;or
  • the path switching information includes third indication information, where the third indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and releases the PC5 interface connection between the first terminal device and the relay device ;or
  • the path switching information includes fourth indication information, and the fourth indication information is used to indicate that: the first terminal device establishes a PC5 interface connection with the relay device, and releases the Uu interface connection between the first terminal device and the access network device .
  • the first indication information For the first indication information, the second indication information, the third indication information, and the fourth indication reference information, reference may be made to the relevant descriptions in the foregoing embodiments, and details are not repeated here.
  • the path switching information may be the target connection mode between the first terminal device and the access network device, that is, the connection mode between the first terminal device and the access network device to be switched to .
  • the target connection mode may be, for example, one of Uu interface and PC5 interface dual connection, Uu interface single connection or PC5 interface single connection.
  • the path switching information received by the first terminal device is determined by the access network device according to the connection mode preference reported by the first terminal device, and the first terminal device switches between the first terminal device and the access network according to the path switching information.
  • the connection method between network devices can better meet its own connection needs.
  • step 604 the embodiments of the present application provide the following several possible implementation manners.
  • the path switching information includes first indication information.
  • step 604 may include:
  • the first terminal device establishes a Uu interface connection with the access network device according to the first indication information in the path switching information, and maintains the PC5 interface connection between the first terminal device and the relay device.
  • the first terminal device can connect the connection according to the first indication information in the path switching information.
  • the mode is switched to the dual connection of the Uu interface and the PC5 interface, so that the first terminal device can not only continue to transmit the uncompleted service data through the PC5 interface, but also use the Uu interface to transmit data to ensure service continuity.
  • Such a connection mode can meet the needs of services that require high continuity.
  • the path switching information includes second indication information, as shown in the schematic diagram of the scenario shown in FIG. 6D , step 604 may include:
  • the first terminal device releases the Uu interface connection with the access network device according to the second indication information in the path switching information, and maintains the PC5 interface connection between the first terminal device and the relay device.
  • the access network device may send the second indication information to the first terminal device.
  • the first terminal device switches to the single connection of the PC5 interface according to the second indication information (specifically, the first terminal device releases the Uu interface connection with the access network device, and keeps the first terminal device and the relay
  • the PC5 interface connection between the devices can avoid the interruption of data transmission due to the weak signal strength of the Uu interface, thereby improving the probability of successful data transmission.
  • the path switching information includes third indication information.
  • step 604 may include:
  • the first terminal device establishes a Uu interface connection with the access network device according to the third indication information in the path switching information, and releases the PC5 interface connection with the relay device.
  • the access network device sends the third indication information to the first terminal device.
  • the first terminal device switches to the Uu interface single connection according to the third indication information (specifically, the first terminal device establishes a Uu interface connection with the access network device, and releases the first terminal device and the relay PC5 interface connection between devices), which can improve the data transmission efficiency.
  • the connection mode can meet the demand for services with high data transmission efficiency.
  • the path switching information includes fourth indication information, as shown in the schematic diagram of the scenario shown in FIG. 6F , step 604 may include:
  • the first terminal device releases the Uu interface connection between the access network devices according to the fourth indication information in the path switching information, and establishes the PC5 interface connection with the relay device.
  • the access network device sends fourth indication information to the first terminal device.
  • the first terminal device switches to the PC5 interface single connection according to the fourth indication information (specifically, the first terminal device releases the Uu interface connection with the access network device, and establishes a connection with the relay device.
  • PC5 interface connection which can avoid the interruption of data transmission due to the weak signal strength of the Uu interface, and improve the probability of successful data transmission.
  • the path switching information may be the target connection mode between the first terminal device and the access network device.
  • the first terminal device may switch the connection mode to the target connection mode.
  • the target connection mode between the first terminal device and the access network device is the dual connection of the Uu interface and the PC5 interface, then the first terminal device connects the connection between the first terminal device and the access network device according to the path switching information mode, switch to Uu interface and PC5 interface dual connection.
  • the target connection mode between the first terminal device and the access network device is a single connection of the Uu interface
  • the first terminal device changes the connection mode between the first terminal device and the access network device according to the path switching information, Switch to Uu interface single connection.
  • the target connection mode between the first terminal device and the access network device is the single connection of the PC5 interface, then the first terminal device changes the connection mode between the first terminal device and the access network device according to the path switching information, Switch to PC5 interface single connection.
  • connection method further includes:
  • the first terminal device sends a registration request to the AMF.
  • the registration request includes path support capability information of the first terminal device, wherein the path support capability information indicates that the first terminal device supports one or more of the following: dual connection between Uu interface and PC5 interface, Uu interface connection, or PC5 interface connection.
  • the first terminal device may send a registration request to the access network device, and the access network device forwards the registration request to the AMF.
  • Step 605 is performed before step 602 . Specifically, step 605 may be performed before step 601 , may be performed after step 601 and before step 602 , or may be performed simultaneously with step 601 .
  • the AMF can obtain the path support capability information, and send the path support capability information to the access network device, so that the access network device determines that the first terminal device has the path switch information before sending the path switch information to the first terminal device.
  • the capability of the indicated target connection mode can avoid connection mode switching failure caused by the fact that the first terminal device does not have the capability of the target connection mode indicated by the path switching information.
  • FIG. 6G may be implemented independently, or may be implemented in combination with any of the embodiments corresponding to the above-mentioned FIG. 6A-FIG. 6F .
  • connection method may include the following steps:
  • the first terminal device sends a registration request to the access network device.
  • the access network device sends the registration request to the AMF.
  • the access network device may select an appropriate AMF for the first terminal device, and send the registration request to the AMF.
  • the access network device may not read or parse the registration request.
  • step 701 and step 702 are optional steps in this embodiment of the present application.
  • the AMF acquires the connection mode preference information of the first terminal device.
  • connection mode preference information of the first terminal device For the connection mode preference information of the first terminal device, reference may be made to the relevant descriptions in the foregoing embodiments, and details are not repeated here.
  • the AMF may acquire the subscription data of the first terminal device from the UDM by means of subscription retrieval, and obtain the connection mode preference information from the subscription data.
  • the AMF can obtain the connection mode preference information of the first terminal device from the subscription data of the UDM, and send the connection mode preference information to the access device, so that the access network device can according to the connection mode preference information of the first terminal device , and send path switching information to the terminal device.
  • the AMF sends the connection mode preference information to the access network device
  • connection mode preference information may be carried in a context transfer message.
  • the AMF may send a context transfer message to the access network device, where the context transfer message includes connection mode preference information.
  • the connection mode preference information is carried in the context transfer message, which helps to save signaling overhead.
  • the access network device can instruct the first terminal device to switch the connection mode according to the connection mode preference information sent by the AMF, so that the connection mode switched by the first terminal device is more in line with the connection requirements of the first terminal.
  • the first terminal device sends a measurement report to the access network device.
  • the measurement report may include the signal strength of the PC5 interface and/or the signal strength of the Uu interface.
  • the access network device sends path switching information to the first terminal device according to the connection mode preference information and the measurement report.
  • the path switching information may be used to switch the connection mode between the first terminal device and the access network device.
  • the path switching information may be the target connection mode of the first terminal device, and reference is made to the relevant descriptions in the foregoing embodiments, and details are not repeated here.
  • the path switching information may also be indication information used to instruct the first terminal device to perform a specific action. For the specific indication information, refer to the relevant descriptions in the foregoing embodiments, and details are not repeated here.
  • the first terminal device switches the connection mode between the first terminal device and the access network device according to the path switching information.
  • the measurement report includes the signal strength of the Uu interface.
  • step 706 may include:
  • connection mode preference is dual connection of the Uu interface and the PC5 interface
  • the connection mode currently used between the first terminal device and the access network device is the single connection of the PC5 interface
  • the signal of the Uu interface of the first terminal device satisfies In the first preset condition
  • the access network device determines to switch the connection mode between the first terminal device and the access network device to dual connection of the Uu interface and the PC5 interface.
  • the access network device sends path switching information to the first terminal device, where the path switching information includes the first indication information.
  • steps 3021 and 3022 in the above embodiment are also applicable to steps 7061 and 7062 in this embodiment, and are not repeated here.
  • Step 707 may include:
  • the first terminal device establishes a Uu interface connection with the access network device according to the first indication information in the path switching information, and maintains the PC5 interface connection between the first terminal device and the relay device.
  • step 6041 in the above embodiment are also applicable to step 7071 in this embodiment, and are not repeated here.
  • the registration request includes path support capability information.
  • the path support capability information indicates that the first terminal device supports dual connection of the Uu interface and the PC5 interface.
  • step 706 may further include:
  • the access network device determines, according to the path support capability information of the first terminal device, that the first terminal device supports dual connection of the Uu interface and the PC5 interface.
  • step 3023 in the above embodiment are also applicable to step 7063 in this embodiment, and are not repeated here.
  • step 706 may include:
  • connection mode preference is dual connection of the Uu interface and the PC5 interface
  • connection mode currently used between the first terminal device and the access network device is the dual connection of the Uu interface and the PC5 interface, and the Uu interface of the first terminal device If the signal satisfies the second preset condition, the access network device determines to switch the connection mode between the first terminal device and the access network device to PC5 interface single connection.
  • the access network device sends path switching information to the first terminal device, where the path switching information may include second indication information.
  • steps 3024 and 3025 in the above embodiment are also applicable to steps 7064 and 7065 in this embodiment, and are not repeated here.
  • Step 707 may include:
  • the first terminal device releases the Uu interface connection with the access network device according to the second indication information in the path switching information, and maintains the PC5 interface connection between the first terminal device and the relay device.
  • step 6042 in the above embodiment are also applicable to step 7072 in this embodiment, and are not repeated here.
  • connection mode preference indicated by the connection mode preference information is the Uu interface single connection.
  • step 706 may include:
  • connection mode preference is Uu interface single connection
  • the connection mode currently used between the first terminal device and the access network device is PC5 interface single connection
  • the signal of the Uu interface of the first terminal device satisfies the first preset. If the conditions are set, the access network device determines to switch the connection mode between the first terminal device and the access network device to Uu interface single connection.
  • the access network device sends path switching information to the first terminal device, where the path switching information may include third indication information.
  • steps 3026 and 3027 in the above embodiment are also applicable to steps 7066 and 7067 in this embodiment, and are not repeated here.
  • Step 707 may include:
  • the first terminal device establishes a Uu interface connection with the access network device according to the third indication information in the path switching information, and releases the PC5 interface connection with the relay device.
  • step 6043 in the above embodiment is also applicable to step 7073 in this embodiment, and details are not repeated here.
  • connection mode preference indicated by the connection mode preference information is the Uu interface single connection.
  • step 706 may include:
  • connection mode preference is Uu interface single connection
  • the connection mode currently used between the first terminal device and the access network device is Uu interface single connection
  • the signal of the Uu interface of the first terminal device satisfies the second preset. If the conditions are set, the access network device determines that the connection mode of switching the first terminal device and the access network device is PC5 interface single connection.
  • the access network device sends path switching information to the first terminal device, where the path switching information may include fourth indication information.
  • steps 3028 and 3029 in the above embodiment are also applicable to steps 7068 and 7069 in this embodiment, and are not repeated here.
  • Step 707 may include:
  • the first terminal device releases the Uu interface connection between the access network devices according to the fourth indication information in the path switching information, and establishes the PC5 interface connection with the relay device.
  • step 6044 in the above embodiment are also applicable to step 7074 in this embodiment, and are not repeated here.
  • the path switching information may also be the target connection mode between the first terminal device and the access network device.
  • the first terminal device may switch the connection mode to the target connection mode.
  • the target connection mode between the first terminal device and the access network device is the dual connection of the Uu interface and the PC5 interface, then the first terminal device connects the connection between the first terminal device and the access network device according to the path switching information mode, switch to Uu interface and PC5 interface dual connection.
  • the target connection mode between the first terminal device and the access network device is a single connection of the Uu interface
  • the first terminal device changes the connection mode between the first terminal device and the access network device according to the path switching information, Switch to Uu interface single connection.
  • the target connection mode between the first terminal device and the access network device is the single connection of the PC5 interface, then the first terminal device changes the connection mode between the first terminal device and the access network device according to the path switching information, Switch to PC5 interface single connection.
  • connection method may include the following steps:
  • the SMF acquires connection mode preference information of the first terminal device.
  • the SMF may acquire the connection mode preference information of the first terminal device from the UDM.
  • the SMF recognizes that the first terminal device is connecting with the access network device through the relay device. Then, the SMF may acquire the connection mode preference information of the first terminal device from the UDM.
  • the SMF sends the connection mode preference information to the access network device.
  • connection mode preference information indicates that the connection mode preference of the first terminal device is Uu interface and PC5 interface dual connection; or the connection mode preference information indicates that the connection mode of the first terminal device is Uu interface single connection, or the connection mode preference information indicates The connection mode of the first terminal device is PC5 interface single connection.
  • connection method further includes:
  • the first terminal device sends a measurement report to the access network device.
  • the measurement report may include the signal strength of the PC5 interface and/or the signal strength of the Uu interface.
  • the access network device sends path switching information to the first terminal device according to the connection preference information and the measurement report.
  • the first terminal device switches the connection mode between the first terminal device and the access network device according to the path switching information.
  • step 804 and step 805 reference may be made to the implementation manner of step 706 and step 707 in the foregoing embodiment, which will not be repeated here.
  • the SMF can obtain the connection mode preference information of the first terminal device from the UDM, and send the connection mode preference information to the access device, so that the access network device can prefer the connection mode of the first terminal device according to the connection mode preference information of the first terminal device. information, and send path switching information to the first terminal device.
  • connection method may include the following steps:
  • the first terminal device determines a connection mode preference.
  • the preferred connection method is the dual connection of the Uu interface and the PC5 interface, or the single connection of the Uu interface, or the single connection of the PC5 interface.
  • the first terminal device may determine a connection mode preference according to one or more of a business scenario and an expected movement trajectory.
  • the first terminal device may determine that the connection mode preference is dual connection of the Uu interface and the PC5 interface.
  • the first terminal device may determine that the connection mode preference is Uu interface single connection.
  • the first terminal device may determine that the connection mode preference is PC5 interface single connection.
  • the first terminal device sends a measurement report to the access network device.
  • the measurement report includes connection method preference information
  • connection mode preference information indicates that the connection mode preference of the first terminal device is dual connection of Uu interface and PC5 interface; or indicates that the connection mode preference of the first terminal device is Uu interface single connection, or the connection mode preference of the first terminal device is PC5 Interface single connection.
  • the measurement report also includes the signal strength of the Uu interface and/or the signal strength of the PC5 interface.
  • the measurement report includes the signal strength of the Uu interface.
  • the connection method may also include the steps of:
  • the access network device sends path switching information to the first terminal device according to the connection preference information in the measurement report and the signal strength of the Uu interface.
  • the first terminal device switches the connection mode between the first terminal device and the access network device according to the path switching information.
  • step 903 and step 904 reference may be made to the possible implementation manners of step 706 and step 707 in the foregoing embodiment, and details are not described herein again.
  • the first terminal device determines the connection mode preference by itself, and carries the connection mode preference information in the measurement report, so that the access network device can indicate the connection mode preference according to the connection mode preference determined by the first terminal device.
  • the first terminal device switches the connection mode, so that the connection mode of the first terminal device can better meet its own connection requirements.
  • connection apparatus 1000 is a schematic structural diagram of a connection apparatus, an embodiment of the present application further provides a connection apparatus 1000, and the connection apparatus 1000 may be an access network device or be deployed in an access network device.
  • the connection device 1000 includes a receiving unit 1001 and a sending unit 1002;
  • the receiving unit 1001 is configured to acquire connection mode preference information of the first terminal device, where the connection mode preference information indicates the connection mode preference of the first terminal device;
  • the sending unit 1002 is configured to send path switching information to the first terminal device according to the connection mode preference information, where the path switching information is used to switch the connection mode between the first terminal device and the access network device.
  • the connection device sends path switching information to the first terminal equipment according to the connection mode preference information of the first terminal equipment, and the first terminal equipment switches paths according to the path switching information. In this way, the connection mode switched by the first terminal device can better meet the connection requirements of the first terminal device.
  • connection preference includes: dual connection of Uu interface and PC5 interface; or single connection of Uu interface; or single connection of PC5 interface.
  • the sending unit 1002 is specifically configured to:
  • connection mode preference is dual connection of the Uu interface and the PC5 interface
  • connection mode currently used between the first terminal device and the access network device is the single connection of the PC5 interface
  • the first terminal device If the signal of the Uu interface meets the first preset condition, it is determined to switch the connection mode between the first terminal device and the access network device to the dual connection of the Uu interface and the PC5 interface;
  • the path switching information includes first indication information
  • the first indication information is used to instruct: the first terminal equipment establishes a connection with the access network equipment.
  • the Uu interface connection between the first terminal device and the relay device is maintained, and the PC5 interface connection between the first terminal device and the relay device is maintained.
  • the shown connection apparatus further includes a processing unit 1003, and the processing unit 1003 is configured to determine, according to the path support capability information of the first terminal device, that the first terminal device supports the dual connection of the Uu interface and the PC5 interface .
  • the sending unit 1002 is specifically configured to:
  • connection mode is the dual connection of the Uu interface and the PC5 interface
  • connection mode currently used between the first terminal device and the access network device is the dual connection of the Uu interface and the PC5 interface
  • the signal of the Uu interface of a terminal device satisfies the second preset condition, it is determined to switch the connection mode between the first terminal device and the access network device to the single connection of the PC5 interface
  • the path switching information includes second indication information
  • the second indication information is used to instruct: the first terminal equipment releases the connection with the access network equipment.
  • the Uu interface connection between the first terminal device and the relay device is maintained, and the PC5 interface connection between the first terminal device and the relay device is maintained.
  • the sending unit 1002 is specifically configured to:
  • connection mode preference is Uu interface single connection
  • the connection mode currently used between the first terminal device and the access network device is PC5 interface single connection
  • the Uu interface of the first terminal device If the signal meets the first preset condition, it is determined to switch the connection mode between the first terminal device and the access network device to the Uu interface single connection
  • the path switching information includes third indication information
  • the third indication information is used to instruct: the first terminal equipment establishes a connection with the access network equipment.
  • the Uu interface connection between the first terminal device and the relay device is released, and the PC5 interface connection between the first terminal device and the relay device is released.
  • the sending unit 1002 is specifically configured to:
  • connection mode currently used between the first terminal device and the access network device is Uu interface single connection
  • the Uu interface of the first terminal device The signal satisfies the second preset condition, then it is determined that the connection mode of switching the first terminal device and the access network device is PC5 interface single connection
  • the path switching information includes fourth indication information, where the fourth indication information is used to instruct: the first terminal device establishes a connection between the first terminal device and the relay device connected to the PC5 interface, and release the Uu interface connection between the first terminal device and the access network device.
  • the receiving unit 1001 is specifically configured to: receive the connection mode preference information from a first network device, the first network device
  • the device is an access and mobility management function device or a session management device.
  • the receiving unit 1001 is specifically configured to: receive the connection mode preference information from the first terminal device.
  • connection mode preference information is carried in the measurement report.
  • connection device 1000 of the embodiment of the present application It should be understood that the related supplementary descriptions and beneficial effects in the connection method of the embodiment of the present application are also used in the connection device 1000 of the embodiment of the present application, and to avoid redundancy, details are not repeated here.
  • connection apparatus 1100 may be a first network device, or be deployed on the first network device.
  • the first network device may be a core network device, for example, AMF or SMF, which is not limited.
  • the connection device 1100 includes: a receiving unit 1101 and a sending unit 1102;
  • the receiving unit 1101 is configured to acquire connection mode preference information of the first terminal device, where the connection mode preference information indicates the connection mode preference of the first terminal device;
  • the sending unit 1102 is configured to send the connection mode preference information to the access network device.
  • the access network device can instruct the first terminal device to switch the connection mode according to the connection mode preference information, so that the connection mode switched by the first terminal device is more in line with the connection requirements of the first terminal.
  • the receiving unit 1101 is specifically configured to:
  • the subscription data of the first terminal device is acquired, and the connection mode preference information is obtained according to the subscription data of the first terminal device.
  • the receiving unit 1101 is further configured to:
  • the path support capability information indicates that the first terminal device supports one or more of the following: dual connection of the Uu interface and the PC5 interface, single connection of the Uu interface, or single connection of the PC5 interface.
  • connection method of the embodiment of the present application also use the connection device 1100 of the embodiment of the present application, and to avoid redundancy, details are not repeated here.
  • connection apparatus 1200 may be the first terminal device, or be deployed in the first terminal device.
  • the connection device 1200 includes a processing unit 1201 and a sending unit 1202,
  • the processing unit 1201 is used to determine the connection method preference
  • the sending unit 1202 is configured to send the connection mode preference information to the access network device, where the connection mode preference information indicates the connection mode preference of the first terminal device.
  • the first terminal device can determine the connection mode preference by itself, and send the connection mode preference information indicating the connection mode preference to the access network device, so that the access network device can indicate the first terminal device according to the connection mode preference determined by the first terminal device.
  • a terminal device switches the connection mode, so that the connection mode of the first terminal device can better meet its own connection requirements.
  • connection mode preference information is carried in a measurement report or a registration request.
  • the sending unit 1202 is further configured to:
  • the path support capability information indicates that the first terminal device supports one or more of the following: dual connection of the Uu interface and the PC5 interface, single connection of the Uu interface, or single connection of the PC5 interface.
  • the processing unit 1201 is specifically configured to: determine the connection mode preference information according to one or more of a business scenario and an expected movement trajectory.
  • the connecting device 1200 further includes:
  • a receiving unit 1203, configured to receive path switching information from the access network device
  • the processing unit 1201 is further configured to switch the connection mode between the first terminal device and the access network device according to the path switching information
  • the path switching information includes first indication information, where the first indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and keeps the first terminal device connected to the PC5 interface between the relay device; or
  • the path switching information includes second indication information, where the second indication information is used to instruct: the first terminal device releases the Uu interface connection with the access network device and keeps the first terminal device connected to the PC5 interface between the relay device; or
  • the path switching information includes third indication information, where the third indication information is used to instruct: the first terminal device establishes a Uu interface connection with the access network device, and releases the first terminal device connected to the PC5 interface between the relay device; or
  • the path switching information includes fourth indication information, and the fourth indication information is used to indicate that: the first terminal device establishes a PC5 interface connection with the relay device, and releases the first terminal device from connecting with the relay device. Uu interface connection between the access network devices.
  • connection device 1200 of the embodiment of the present application also use the connection device 1200 of the embodiment of the present application, and to avoid redundancy, details are not repeated here.
  • FIG. 13 is a schematic structural diagram of a communication device 1300 according to an embodiment of the present application.
  • the communication device 1300 may include: a processor 1301 , a transceiver 1305 , and optionally a memory 1302 .
  • the transceiver 1305 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing a transceiver function.
  • the transceiver 1305 may include a receiver and a transmitter, the receiver may be called a receiver, a receiving circuit or a receiving unit, etc., for implementing a receiving function; the transmitter may be called a transmitter, a transmitting circuit or a transmitting unit, and the like.
  • the processor 1301 Stored in the memory 1302 may be a computer program or software code or instructions 1304, which may also be referred to as firmware.
  • the processor 1301 can control the MAC layer and the PHY layer by running the computer program or software code or instruction 1303 therein, or by calling the computer program or software code or instruction 1304 stored in the memory 1302, so as to realize the following aspects of the present application.
  • the processor 1301 can be a central processing unit (central processing unit, CPU), and the memory 1302 can be, for example, a read-only memory (read-only memory, ROM), or a random access memory (random access memory, RAM).
  • the processor 1301 and transceiver 1305 described in this application may be implemented in integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application specific integrated circuits (ASICs), printed circuits board (printed circuit board, PCB), electronic equipment, etc.
  • ICs integrated circuits
  • RFICs radio frequency integrated circuits
  • ASICs application specific integrated circuits
  • PCB printed circuits board
  • electronic equipment etc.
  • the above-mentioned communication device 1300 may further include an antenna 1306, and each module included in the communication device 1300 is for illustration only, and is not limited in this application.
  • the communication device 1300 in the description of the above embodiments may be the first terminal device, the access network network device or the first network device, but the scope of the communication device described in this application is not limited to this, and the communication device The structure may not be limited by FIG. 11 .
  • the communication device may be a stand-alone device or may be part of a larger device.
  • the implementation form of the communication device may be:
  • Independent integrated circuit IC or chip, or, chip system or subsystem
  • a set of one or more ICs, optionally, the IC set may also include storage for storing data and instructions components; (3) modules that can be embedded in other devices; (4) receivers, smart terminals, wireless devices, handsets, mobile units, in-vehicle devices, cloud devices, artificial intelligence devices, etc.; (5) others, etc. .
  • the chip shown in Figure 14 includes a processor and an interface.
  • the number of processors may be one or more, and the number of interfaces may be multiple. Interfaces are used for signal reception and transmission.
  • the chip or chip system may include memory.
  • the memory is used to store the necessary program instructions and data of the chip or chip system.
  • the communication device 1300 is the access network device in the above method embodiments, and the communication device 1300 can implement any one of the methods performed by the access network device in the embodiments of the present application through a processor and a transceiver some or all of the steps, such as:
  • the transceiver 1305 may be configured to obtain connection mode preference information of the first terminal device, where the connection mode preference information indicates the connection mode preference of the first terminal device; Sending path switching information, where the path switching information is used to switch the connection mode between the first terminal device and the access network device.
  • the communication device 1300 is the first terminal device in the above method embodiments, and the communication device 1300 can implement any one of the first terminal device executed in the embodiments of the present application through the processor and the transceiver. Some or all steps of a method, such as:
  • the processor 1301 is used to determine the connection method preference
  • the transceiver 1305 may be configured to send the connection mode preference information to the access network device, where the connection mode preference information indicates the connection mode preference of the first terminal device.
  • the communication device 1300 is the first network device in the foregoing method embodiments, and the communication device 1300 may implement any one of the first network devices in the embodiments of the present application to be executed by the processor and the transceiver. Some or all steps of a method, such as:
  • the transceiver 1305 is configured to acquire connection mode preference information of the first terminal device, where the connection mode preference information indicates the connection mode preference of the first terminal device, and is configured to send the connection mode preference information to the access network device.
  • the present application further provides a communication system, such as a schematic diagram of the architecture of the communication system as shown in FIG. 15 .
  • the communication system includes the first terminal device and the access network device in any of the foregoing embodiments.
  • the communication system may also Including the relay device in any of the above embodiments, the relay device is connected to the access network device.
  • the relay device may be, for example, a relay terminal device.
  • the communication system may further include the first network device in any of the foregoing embodiments.
  • the first network device may be a core network device, for example, AMF or SMF, which is not limited.
  • the present application further provides another communication system, such as a schematic diagram of the architecture of the communication system shown in FIG. 16 , where the communication system includes the connection apparatus 1000 in the foregoing embodiment and the connection apparatus 1200 in the foregoing embodiment.
  • the communication system may further include the relay device in any of the foregoing embodiments, where the relay device is connected to the access network device or the connection apparatus 1000 .
  • the relay device may be, for example, a relay terminal device.
  • the communication system may further include the connection device 1100 in the foregoing embodiment.
  • the present application provides a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium, and the computer instructions instruct a user equipment to execute the connection method in any of the foregoing embodiments.
  • processors mentioned in the embodiments of the present application may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application-specific integrated circuits ( Application Specific Integrated Circuit, ASIC), off-the-shelf Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be Random Access Memory (RAM), which is used as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the device embodiments described above are only illustrative.
  • the division of units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .
  • the modules in the apparatus of the embodiment of the present application may be combined, divided and deleted according to actual needs.

Abstract

本申请提供一种连接方法及相关装置。连接方法包括：接入网设备获取第一终端设备的连接方式偏好信息，连接方式偏好信息指示第一终端设备的连接方式偏好；接入网设备根据连接方式偏好信息，向第一终端设备发送路径切换信息，路径切换信息用于切换第一终端设备与接入网设备的连接方式。这样第一终端设备切换的连接方式，能够更好的符合第一终端设备的连接需求。

Description

连接方法及相关装置 技术领域
本申请涉及无线通信技术领域，尤其涉及一种连接方法及相关装置。
背景技术
D2D(device to device)技术，是指两个终端设备之间直接通信的技术。即，两个终端设备之间的直连通信，绕开接入网设备。
现有通信协议支持终端设备通过中继设备接入网络的网络架构。如图1A所示的网络架构示意图，在该网络架构中，未处于无线网络的覆盖范围的终端设备1(可称作远端设备)可利用D2D技术，通过连接另一个处于网络的覆盖范围内的终端设备2(可称作中继设备)，接入无线网络。也即，远端设备可通过中继设备接入网络。其中，中继设备通过Uu接口与无线网络中的接入网设备连接，远端设备通过PC5接口与中继设备连接。
在终端设备1的移动过程中，会从无线网络的覆盖范围内，移动至无线网络的覆盖范围之外，也有可能从无线网络的覆盖范围之外移动至无线网络的覆盖范围内，在这样的移动过程中，终端设备会切换与接入网设备之间的连接方式。
请参考图1B所示的网络架构示意图，现有技术中，终端设备切换与接入网设备之间的连接方式的方案是，终端设备1从无线网络的覆盖范围内，移动至无线网络的覆盖范围之外时，该终端设备1与接入网设备之间的连接方式切换为终端设备1通过Uu接口直接与无线网络中的接入网设备连接。进一步地，该终端设备1从无线网络的覆盖范围之内移动至无线网络的覆盖范围之外时，该终端设备1与接入网设备的连接方式会切换为：终端设备1通过PC5接口与终端设备2连接，再通过终端设备2与接入网设备连接。
然而，终端设备在不同的场景下，有不同的连接需求，现有技术中，终端设备切换与接入网设备之间的连接方式的方案，无法较好地满足终端设备的连接需求。
发明内容
本申请提供了一种连接方法及相关装置，有助于较好地满足终端设备的连接需求。
第一方面，本申请提供一种连接方法，包括：接入网设备获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息，所述路径切换信息用于切换所述第一终端设备与所述接入网设备的连接方式。
本申请实施方式的技术方案中，接入网设备根据第一终端设备的连接方式偏好信息，向第一终端设备发送路径切换信息，第一终端设备根据路径切换信息切换路径。这样第一终端设备切换的连接方式，能够更好的符合第一终端设备的连接需求。
连接方式偏好，又可以称为连接路径偏好。连接方式偏好可以理解为第一终端设备与接入网连接的连接方式的偏好；或者可以理解为，第一终端设备与接入网设备连接的连接方式的偏好；或者还可以理解为，第一终端设备允许连接接入网设备的连接方式。
具体地，连接方式偏好包括：Uu接口和PC5接口双连接；或者，Uu接口单连接；或者PC5接口单连接。这样，能够根据第一终端设备实际的连接需求，确定合适的连接方式 偏好。
具体地，Uu接口单连接是指，第一终端设备与接入网设备以Uu接口单连接的连接方式连接。
PC5接口单连接是指，第一终端设备与中继设备以PC5接口单连接的连接方式连接，中继设备与接入网设备连接。中继设备与接入网设备可建立有Uu接口连接。
Uu接口和PC5接口双连接，是指第一终端设备与接入网设备以Uu接口的连接方式连接，第一终端设备与接入网设备以PC5接口的连接方式连接。
在某些实施方式中，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息，包括：
当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则所述接入网设备确定将所述第一终端设备与所述接入网设备之间的连接方式切换为Uu接口和PC5接口双连接；
所述接入网设备向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
本申请实施例中，该第一预设条件可以依据以下至少一种：信号强度，信号质量，或信噪比。
例如，第一预设条件可以是以下一种：
Uu接口的信号强度大于或等于第一强度阈值；或者Uu接口的信号强度大于第一强度阈值；或者Uu接口的信号质量大于或等于第一质量阈值；或者Uu接口的信号质量大于第一质量阈值，或者Uu接口的信噪比大于或等于第一信噪比阈值；或者Uu接口的信噪比大于第一信噪比阈值。
显然，上述第一预设条件可以同时依据信号质量、信号强度以及信噪比中的2种或3种，不予限制。
这样，在第一终端设备从无线网络的覆盖区域之外，移动至无线网络的覆盖区域内时，能够根据第一指示信息切换为Uu接口和PC5接口双连接，能够通过PC5接口继续传输未完成传输的业务数据，也能够利用Uu接口传输数据，能够保证业务连续性。这样的连接方式能够满足对连续性要求较高的业务的需求。
可选的，所述接入网设备确定将所述第一终端设备与所述接入网设备之间的连接方式切换为Uu接口和PC5接口双连接之前，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息还包括：所述接入网设备根据所述第一终端设备的路径支持能力信息，确定所述第一终端设备支持Uu接口和PC5接口双连接。
这样，接入网设备能够在指示第一终端设备进行Uu接口和PC5接口双连接之前，先确定第一终端设备Uu接口和PC5接口双连接，这样能够避免在接入网设备向第一终端设备发送第一指示信息之后，第一终端设备无法根据第一指示消息进行Uu接口和PC5接口双连接。
在某些实施方式中，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设 备发送路径切换信息，包括：
当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，且所述第一终端设备的Uu接口的信号满足第二预设条件，则所述接入网设备确定将所述第一终端设备与所述接入网设备之间的连接方式切换为PC5接口单连接；
所述接入网设备向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
该第二预设条件可以依据以下至少一种：信号强度，信号质量，或信噪比。
例如，第二预设条件可以是以下一种：
Uu接口的信号强度小于或等于第一强度阈值；或者Uu接口的信号强度小于第一强度阈值；或者Uu接口的信号质量小于或等于第一质量阈值；或者Uu接口的信号质量小于第一质量阈值，或者Uu接口的信噪比小于或等于第一信噪比阈值；或者Uu接口的信噪比小于第一信噪比阈值。
具体地，若第一预设条件是Uu接口的信号强度大于或等于第一强度阈值，那么第二预设条件可以是Uu接口的信号强度小于第一强度阈值；若第一预设条件是Uu接口的信号强度大于第一强度阈值，那么第二预设条件可以是Uu接口的信号强度小于或等于第一强度阈值。
若第一预设条件是Uu接口的信号质量大于或等于第一质量阈值，那么第二预设条件可以是Uu接口的信号质量小于第一质量阈值；若第一预设条件是Uu接口的信号质量大于第一质量阈值，那么第二预设条件可以是Uu接口的信号质量小于或等于第一质量阈值。
若预设条件是Uu接口的信噪比大于或等于第一信噪比阈值，那么第二预设条件可以是Uu接口的信噪比小于第一信噪比阈值；若预设条件是Uu接口的信噪比大于第一信噪比阈值，那么第二预设条件可以是Uu接口的信噪比小于或等于第一信噪比阈值。
显然，上述第二预设条件可以同时依据信号质量、信号强度以及信噪比中的2种或3种，不予限制。
这样，当第一终端设备从无线网络的覆盖区域内，移动至无线网络的覆盖区域之外时，能够根据第二指示信息切换PC5接口单连接，能够避免因Uu接口信号强度较弱，而导致数据传输中断，从而能够提升数据传输成功的几率。
在某些实施方式中，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息包括：
当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则所述接入网设备确定将所述第一终端设备与所述接入网设备的连接方式切换为Uu接口单连接；
所述接入网设备向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备之间的PC5接口连接。
这样，当第一终端设备从无线网络的覆盖区域之外，移动至无线网络的覆盖区域内时，能够根据第三指示信息切换为Uu接口单连接，能够提升数据传输效率。这样的连接方式能够满足对数据传输效率较高的业务的需求。
在某些实施方式中，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息包括：
当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口单连接，且所述第一终端设备的Uu接口的信号满足第二预设条件，则所述接入网设备确定切换所述第一终端设备与所述接入网设备的连接方式为PC5接口单连接；
所述接入网设备向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
这样，当第一终端设备从无线网络的覆盖区域内，移动至无线网络的覆盖区域之外时，能够根据第四指示信息切换PC5接口单连接，能够避免因Uu接口信号强度较弱，而导致数据传输中断，从而能够提升数据传输成功的几率。
在某些实施方式中，所述接入网设备获取第一终端设备的连接方式偏好信息包括：
所述接入网设备接收来自第一网络设备的所述连接方式偏好信息，所述第一网络设备为接入和移动管理功能设备或会话管理设备。这样，接入网设备能够从第一网络设备获得连接方式偏好信息。
在某些实施方式中，所述接入网设备获取第一终端设备的连接方式偏好信息包括：所述接入网设备接收来自所述第一终端设备的所述连接方式偏好信息。这样，接入网设备能够从第一终端设备获得连接方式偏好信息。
可选的，所述连接方式偏好信息携带在测量报告中。这样，第一终端设备通过在测量报告中携带连接方式偏好信息的方式，向接入网设备发送连接方式偏好信息，能够节省信令开销。例如，第一终端设备可向接入网设备发送测量报告，测量报告中包括连接方式偏好信息。
第二方面，本申请实施方式还提供一种连接方法，包括：第一网络设备获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；所述第一网络设备向接入网设备发送所述连接方式偏好信息。
这样，接入网设备能够根据该连接方式偏好信息，指示第一终端设备切连接方式，从而使得第一终端设备切换的连接方式更加符合第一终端的连接需求。
在某些实施方式中，所述第一网络设备获取第一终端设备的连接方式偏好信息，包括：
所述第一网络设备获取第一终端设备的签约数据；
所述第一网络设备根据所述第一终端设备的签约数据，得到所述连接方式偏好信息。
这样，第一网络设备能够从第一终端设备的签约数据中，获得第一终端设备的连接方式偏好信息，并向接入设备发送该连接方式偏好信息，使得接入网设备能够根据第一终端设备的连接方式偏好信息，向终端设备发送路径切换信息。
在某些实施方式中，所述第一网络设备为接入和移动管理功能设备，所述第一网络设备获取第一终端设备的连接方式偏好信息之前，所述方法还包括：
所述接入和移动管理功能设备接收来自所述第一终端设备的注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息；
其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口单连接，或PC5接口单连接。
这样，接入和移动管理功能设备能够获得第一终端设备的路径支持能力信息，并向接入网设备提供该路径支持能力信息，以使得接入网设备能够根据该路径支持能力信息，确定第一终端设备的连接能力，并根据第一终端设备的连接能力以及连接方式偏好，指示第一终端设备切换连接方式。
第三方面，本申请实施方式还提供有一种连接方法，包括：
第一终端设备确定连接方式偏好；
所述第一终端设备向接入网设备发送所述连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好。
这样，第一终端设备自行确定连接方式偏好，并向接入网设备发送指示该连接方式偏好的连接方式偏好信息，能够使得接入网设备根据第一终端设备自行确定的连接方式偏好，指示第一终端设备切换连接方式，从而能够使得第一终端设备的连接方式能够更好地符合自身的连接需求。
可选的，所述连接方式偏好信息携带在测量报告中。这样有助于减少信令开销。
在某些实施方式中，所述方法还包括：所述第一终端设备向接入和移动管理功能设备发送注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息；
其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口单连接，或PC5接口单连接。
这样，接入和移动管理功能设备能够获得第一终端设备的路径支持能力信息，并向接入网设备提供该路径支持能力信息，以使得接入网设备能够根据该路径支持能力信息，确定第一终端设备的连接能力，并根据第一终端设备的连接能力以及连接方式偏好，指示第一终端设备切换连接方式。
在某些实施方式中，所述第一终端设备确定连接方式偏好信息，包括：所述第一终端设备根据业务场景和预期移动轨迹中的一种或多种，确定所述连接方式偏好信息。
在某些实施方式中，所述方法还包括：
所述第一终端设备接收来自所述接入网设备的路径切换信息；
所述第一终端设备根据所述路径切换信息，切换所述第一终端设备与所述接入网设备之间的连接方式；
其中，所述路径切换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接；或
所述路径切换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备 之间的PC5接口连接；或
所述路径切换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备之间的PC5接口连接；或
所述路径切换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
第四方面，本申请实施方式提供一种连接装置，该连接装置可以为接入网设备，或者部署在接入网设备。连接装置包括接收单元和发送单元；
接收单元用于获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；
发送单元用于根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息，所述路径切换信息用于切换所述第一终端设备与所述接入网设备的连接方式。
本申请实施方式的技术方案中，连接装置根据第一终端设备的连接方式偏好信息，向第一终端设备发送路径切换信息，第一终端设备根据路径切换信息切换路径。这样第一终端设备切换的连接方式，能够更好的符合第一终端设备的连接需求。
在某些实施方式中，所述连接方式偏好包括：Uu接口和PC5接口双连接；或者，Uu接口单连接；或者PC5接口单连接。
在某些实施方式中，在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元802具体用于：当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则确定将所述第一终端设备与所述接入网设备之间的连接方式切换为Uu接口和PC5接口双连接；和
向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
在某些实施方式中，所示连接装置还包括处理器，处理器用于根据所述第一终端设备的路径支持能力信息，确定所述第一终端设备支持Uu接口和PC5接口双连接。
在某些实施方式中，在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元具体用于：
当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，且所述第一终端设备的Uu接口的信号满足第二预设条件，则确定将所述第一终端设备与所述接入网设备之间的连接方式切换为PC5接口单连接；和
向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
在某些实施方式中，在所述根据所述连接方式偏好信息，向所述第一终端设备发送路 径切换信息方面，所述发送单元具体用于：
当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则确定将所述第一终端设备与所述接入网设备的连接方式切换为Uu接口单连接；和
向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备之间的PC5接口连接。
在某些实施方式中，在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元具体用于：
当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口单连接，且所述第一终端设备的Uu接口的信号满足第二预设条件，则确定切换所述第一终端设备与所述接入网设备的连接方式为PC5接口单连接；和
向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
在某些实施方式中，在所述获取第一终端设备的连接方式偏好信息方面，所述接收单元具体用于：接收来自第一网络设备的所述连接方式偏好信息，所述第一网络设备为接入和移动管理功能设备或会话管理设备。
在某些实施方式中，在所述获取第一终端设备的连接方式偏好信息方面，所述接收单元具体用于：接收来自所述第一终端设备的所述连接方式偏好信息。
可选的，所述连接方式偏好信息携带在测量报告中。
应理解，本申请实施方式的连接方法中的相关补充说明及有益效果也使用与本申请实施方式的连接装置，为避免冗余，此处不再赘述。
第五方面，本申请实施方式还提供一种连接装置。该连接装置可以为第一网络设备，或者部署在第一网络设备。该第一网络设备可以是但不限于是接入和移动管理设备或会话管理设备。连接装置包括：接收单元和发送单元；
接收单元用于获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；
发送单元，用于向接入网设备发送所述连接方式偏好信息。
这样，接入网设备能够根据该连接方式偏好信息，指示第一终端设备切连接方式，从而使得第一终端设备切换的连接方式更加符合第一终端的连接需求。
在某些实施方式中，在所述获取第一终端设备的连接方式偏好信息方面，所述接收单元901具体用于：
获取第一终端设备的签约数据，以及根据所述第一终端设备的签约数据，得到所述连接方式偏好信息。
在某些实施方式中，所述接收单元还用于：
接收来自所述第一终端设备的注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息；
其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口单连接，或PC5接口单连接。
应理解，本申请实施方式的连接方法中的相关补充说明及有益效果也使用与本申请实施方式的连接装置，为避免冗余，此处不再赘述。
第六方面，本申请实施方式还提供一种连接装置。该连接装置可以为第一终端设备，或者部署在第一终端设备。连接装置包括处理单元和发送单元，
处理单元用于确定连接方式偏好；
发送单元用于向接入网设备发送所述连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好。
这样，第一终端设备自行确定连接方式偏好，并向接入网设备发送指示该连接方式偏好的连接方式偏好信息，能够使得接入网设备根据第一终端设备自行确定的连接方式偏好，指示第一终端设备切换连接方式，从而能够使得第一终端设备的连接方式能够更好地符合自身的连接需求。
可选的，所述连接方式偏好信息携带在测量报告或注册请求中。
在某些实施方式中，所述发送单元还用于：
向接入和移动管理功能设备发送注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息；
其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口单连接，或PC5接口单连接。
在某些实施方式中，在所述确定连接方式偏好信息方面，所述处理单元1001具体用于：根据业务场景和预期移动轨迹中的一种或多种，确定所述连接方式偏好信息。
在某些实施方式中，所述连接装置还包括：
接收单元，用于接收来自所述接入网设备的路径切换信息；
所述处理单元还用于根据所述路径切换信息，切换所述第一终端设备与所述接入网设备之间的连接方式；
所述路径切换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接；或
所述路径切换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接；或
所述路径切换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备之间的PC5接口连接；或
所述路径切换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
应理解，本申请实施方式的连接方法中的相关补充说明及有益效果也使用与本申请实施方式的连接装置，为避免冗余，此处不再赘述。
第七方面，本申请提供一种通信设备，通信设备包括处理器，处理器与存储器耦合，当处理器执行存储器中的计算机程序或指令时，使得上述第一方面任一实施方式的方法被执行。
可选地，该装置还包括存储器。
可选地，该装置还包括通信接口，处理器与通信接口耦合。
可选的，处理器为一个或多个，存储器为一个或多个。
可选的，存储器可以与处理器集成在一起，或者存储器与处理器分离设置。
可选的，收发器中可以包括，发射机(发射器)和接收机(接收器)。
在一种实现方式中，该通信设备为第一终端设备、接入网网络设备或第一网络设备。当该通信设备为第一终端设备、接入网网络设备或第一网络设备时，通信接口可以是收发器，或，输入/输出接口。可选地，收发器可以为收发电路。可选地，输入/输出接口可以为输入/输出电路。
在另一种实现方式中，该通信设备为芯片或芯片系统。当该装置为芯片或芯片系统时，通信接口可以是该芯片或芯片系统上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。处理器也可以体现为处理电路或逻辑电路。
第八方面，本申请提供了一种通信系统，通信系统包括第第四方面的连接装置、第五方面的连接装置和第六方面的连接装置；或者，通信系统包括上述的第一终端设备、接入网网络设备、以及第一网络设备。
第九方面，本申请提供了一种计算机程序产品，计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当计算机程序被运行时，使得计算机执行上述第一方面、上述第二方面或上述第三方面中任一种可能实现方式中的方法。
第十方面，本申请提供了一种计算机可读存储介质，计算机可读介质存储有计算机程序(也可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述第一方面、上述第二方面或上述第三方面中任一种可能实现方式中的方法。
第十一方面，本申请还提供一种芯片，包括：处理器和接口，用于执行存储器中存储的计算机程序或指令，执行上述第一方面至第三方面中任一种可能实现方式中的方法。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍。
图1A为一种网络架构的示意图；
图1B为另一种网络架构的示意图；
图2A为一种通信系统的架构图；
图2B为另一种通信系统的架构图；
图3A为本申请实施例的连接方法的流程示意图；
图3B为本申请实施例的连接方法的另一流程示意图；
图3C为本申请实施例的连接方法的另一流程示意图；
图3D为本申请实施例的连接方法的另一流程示意图；
图3E为本申请实施例的连接方法的另一流程示意图；
图3F为本申请实施例的连接方法的另一流程示意图；
图3G为本申请实施例的连接方法的另一流程示意图；
图4A为本申请实施例的连接方法涉及的场景示意图；
图4B为本申请实施例的连接方法涉及的另一场景示意图；
图4C为本申请实施例的连接方法涉及的另一场景示意图；
图4D为本申请实施例的连接方法涉及的另一场景示意图；
图4E为本申请实施例的连接方法涉及的另一场景示意图；
图5A为本申请另一实施例的连接方法的流程示意图；
图5B为本申请另一实施例的连接方法的流程示意图；
图5C为本申请另一实施例的连接方法的流程示意图；
图6A为本申请另一实施例的连接方法的流程示意图；
图6B为本申请另一实施例的连接方法的流程示意图；
图6C为本申请另一实施例的连接方法的流程示意图；
图6D为本申请另一实施例的连接方法的流程示意图；
图6E为本申请另一实施例的连接方法的流程示意图；
图6F为本申请另一实施例的连接方法的流程示意图；
图6G为本申请另一实施例的连接方法的流程示意图；
图7A为本申请另一实施例的连接方法的流程示意图；
图7B为本申请另一实施例的连接方法的流程示意图；
图7C为本申请另一实施例的连接方法的流程示意图；
图7D为本申请另一实施例的连接方法的流程示意图；
图7E为本申请另一实施例的连接方法的流程示意图；
图8为本申请另一实施例的连接方法的流程示意图；
图9为本申请另一实施例的连接方法的流程示意图；
图10为本申请实施例的连接装置的结构示意图；
图11为本申请实施例的另一连接装置的结构示意图；
图12为本申请实施例的另一连接装置的结构示意图；
图13为本申请实施例的通信设备的结构示意图；
图14为本申请实施例的芯片的结构示意图；
图15为本申请实施例的通信系统的架构示意图；
图16为本申请实施例的通信系统的另一架构示意图。
具体实施方式
下面将结合附图对本申请实施例中的技术方案进行清楚、详尽地描述。其中，在本申请实施例的描述中，除非另有说明，“/”表示或的意思，例如，A/B可以表示A或B；文本中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，在本申请实施例的描述中，“多个”是指两个或多于两个。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为暗示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
本申请实施例的技术方案可以应用于各种通信系统。例如：增强的长期演进(enhanced-long term evolution，eLTE)系统、第五代(5th generation，5G)系统或新无线(new radio，NR)等，本申请中涉及的5G移动通信系统包括非独立组网(non-standalone，NSA)的5G移动通信系统或独立组网(standalone，SA)的5G移动通信系统。本申请提供的技术方案还可以应用于未来的通信系统，如第六代移动通信系统。通信系统还可以是陆上公用移动通信网(public land mobile network，PLMN)网络、设备到设备(device-to-device，D2D)通信系统、机器到机器(machine to machine，M2M)通信系统、物联网(Internet of Things，IoT)通信系统或者其他通信系统。
请参见图2A，图2A为一种通信系统的架构图。如图2A，该通信系统包括接入网设备、第一终端设备(可以称为远端设备)和中继设备。可选的，通信系统还可以包括接入和移动管理功能(access and mobility management function，AMF)设备、会话管理(session management function，SMF)设备。
本申请中，将AMF设备简称为AMF，将SMF设备简称为SMF。
请参见图2B，图2B为另一种通信系统的架构图，该通信系统可以为第五代移动通信网络的基于参考点的非漫游架构。本申请实施例的通信系统可用于但不限于用于如图2B所示的第五代移动通信网络的基于参考点的非漫游架构。该通信网络主要包括AMF、SMF、用户面功能(user plane function，UPF)设备以及，统一数据管理(unified data management，UDM)设备。可选的，该通信网络还可以包括策略控制功能(policy control function，PCF)设备、数据网络(data network，DN)。
本申请中将UPF设备简称为UPF，将PCF设备简称为PCF，将UDM设备简称为UDM。
上述各设备、网元之间可以直接通信，也可以通过其他设备或网元的转发进行通信，本申请实施例对此不作具体限定。虽然未示出，该通信系统还可以包括其他网元，本申请实施例对此不做具体限定。
可选的，本申请实施例中的第一终端设备和/或中继设备为终端设备。本申请实施例中的第一终端设备和/或中继设备可以指接入终端、用户单元、用户站、移动站、移动台、中继站、远方站、远程终端、移动设备、用户终端(user terminal)、用户设备(user equipment，UE)、终端(terminal)、无线通信设备、用户代理、用户装置、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop， WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端或者未来演进的PLMN中的终端或者未来车联网中的终端等，本申请实施例对此并不限定。
第一终端设备和/或中继设备可以是手机、平板电脑、带无线收发功能的电脑、虚拟现实终端、增强现实终端、工业控制中的无线终端、无人驾驶中的无线终端、远程手术中的无线终端、智能电网中的无线终端、运输安全中的无线终端、智慧城市中的无线终端、智慧家庭中的无线终端等。第一终端设备与中继设备可以是同一种终端设备，也可以是不同的终端设备。例如，第一终端设备可以是手机，中继设备可以是无人驾驶中的无线终端。又例如，第一终端设备和/或中继设备均为可以是无人驾驶中的无线终端。
作为示例而非限定，在本申请实施例中，可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
此外，在本申请实施例中，第一终端设备和/或中继设备还可以是物联网(internet of things，IoT)系统中的终端，IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。在本申请实施例中，IOT技术可以通过例如窄带(narrow band，NB)技术，做到海量连接，深度覆盖，终端省电。
此外，在本申请实施例中，第一终端设备和/或中继设备还可以包括智能打印机、火车探测器、加油站等传感器，主要功能包括收集数据(部分终端)、接收接入网设备的控制信息与下行数据，并发送电磁波，向接入网设备传输上行数据。
中继设备为在接入网设备的服务范围内的终端设备，中继设备可通过Uu接口与接入网设备连接。第一终端设备可以是在接入网设备的服务范围内的终端设备，也可以是不在接入网设备的服务范围内的终端设备。
可选的，本申请实施例中的接入网设备是用于与终端通信的任意一种具有无线收发功能的通信设备。该接入网设备包括但不限于：演进型节点B(evolved node B,eNB)，基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者传输接收点(transmission reception point，TRP)等。该接入网设备还可以为5G系统中的gNB或TRP或TP，或者5G系统中的基站的一个或一组(包括多个天线面板)天线面板。此外，该接入网设备还可以为构成gNB或TP的网络节点，如BBU，或分布式单元(distributed unit，DU)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。此外，gNB还可以包括有源天线单元(active antenna unit，AAU)。CU实现gNB的部分功能，DU实 现gNB的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理层(physical layer，PHY)的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，接入网设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。
可选的，本申请实施例中的接入网设备和终端设备之间可以通过授权频谱进行通信，也可以通过免授权频谱进行通信，也可以同时通过授权频谱和免授权频谱进行通信。接入网设备和终端之间可以通过6千兆赫(gigahertz，GHz)以下的频谱进行通信，也可以通过6GHz以上的频谱进行通信，还可以同时使用6GHz以下的频谱和6GHz以上的频谱进行通信。本申请的实施例对接入网设备和终端设备之间所使用的频谱资源不做限定。
可选的，本申请实施例中提及的第一终端设备，中继设备或接入网设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和人造卫星上。本申请的实施例对第一终端设备，中继设备或接入网设备的应用场景不做限定。
可选的，在本申请实施例中，第一终端设备，中继设备或接入网设备包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且，本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是第一终端设备，中继设备或接入网设备，或者，是第一终端设备，中继设备或接入网设备中能够调用程序并执行程序的功能模块。
换言之，本申请实施例中的第一终端设备，中继设备或接入网设备的相关功能可以由一个设备实现，也可以由多个设备共同实现，还可以是由一个设备内的一个或多个功能模块实现，本申请实施例对此不作具体限定。可以理解的是，上述功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行的软件功能，或者是硬件与软件的结合，或者是平台(例如，云平台)上实例化的虚拟化功能。
本申请中，AMF主要负责信令的处理，例如：接入控制、移动性管理、附着与去附着以及网关选择等功能。AMF实体为终端中的会话提供服务的情况下，会为该会话提供控制面的存储资源，以存储会话标识、与会话标识关联的SMF实体标识等。
SMF主要负责会话管理，用户面功能实体的选择，用户面功能实体的重定向，因特网 协议(internet protocol，IP)地址分配，承载的建立、修改和释放，以及服务质量(quality of service，QoS)的控制等。
UDM主要用于管理用户签约数据。
UPF用于对用户报文进行处理，如转发、计费等。
PCF用于向AMF、SMF提供策略，如QoS策略、切片选择策略等。
DN是为用户提供数据传输服务的运营商网络。
下面结合实施例以及附图详细阐述本申请的技术方案。
如图3A的流程示意图，本申请提供一种连接方法，如下所述。
301、接入网设备获取第一终端设备的连接方式偏好信息。
其中，第一终端设备可以称为远端设备，即可以通过中继设备与接入网设备进行通信的设备。中继设备可以是但不限于是中继终端设备。中继设备与接入网设备连接。
其中，连接方式偏好信息可以指示第一终端设备的连接方式偏好。
其中，连接方式偏好，又可以称为连接路径偏好。连接方式偏好可以理解为第一终端设备与接入网连接的连接方式或连接路径的偏好或喜好；或者可以理解为，第一终端设备与接入网设备连接的优选连接方式；或者还可以理解为，第一终端设备允许连接接入网设备的连接方式。
具体地，连接方式偏好可以包括：Uu接口和PC5接口双连接，Uu接口单连接，或者PC5接口单连接中的一种或多种。
Uu接口单连接可以是指：第一终端设备仅通过Uu接口的连接方式与接入网设备连接。
PC5接口单连接可以是指：第一终端设备仅以PC5接口的连接方式通过中继设备与接入网设备连接。即，第一终端设备以PC5接口的连接方式与中继设备连接，且该中继设备与接入网设备连接，进而实现了第一终端设备与接入网设备的连接。中继设备与接入网设备可建立有Uu接口连接。
Uu接口和PC5接口双连接可以是指：第一终端设备以Uu接口的连接方式与接入网设备连接，并且第一终端设备还以PC5接口的连接方式与接入网设备连接。
例如，连接方式偏好为Uu接口和PC5接口双连接可以是指：当第一终端设备的Uu接口的信号满足第一预设条件时，第一终端设备偏好于：与接入网设备通过Uu接口连接，并保持与中继设备的PC5接口，其中，该中继设备与接入网设备连接。进而，实现第一终端设备既通过该中继设备与接入网设备连接，也通过Uu接口与接入网设备连接。
例如，连接方式偏好为Uu接口单连接可以是指：当第一终端设备的Uu接口的信号满足第一预设条件时，第一终端设备偏好于：通过Uu接口单连接的连接方式与接入网设备连接。
例如，连接方式偏好为PC5接口单连接可以是指：无论第一终端设备的Uu接口的信号强度是否符合Uu接口的信号强度要求，第一终端设备偏好于(或者保持，或者优先使用)：仅通过PC5接口与中继设备连接，其中，该中继设备与接入网设备连接。进而，实现第一终端设备通过该中继设备与接入网设备连接。
本申请实施例中，该第一预设条件可以依据以下至少一种：信号强度，信号质量，或 信噪比。
例如，第一预设条件可以是以下一种：
Uu接口的信号强度大于或等于第一强度阈值；或者Uu接口的信号强度大于第一强度阈值；或者Uu接口的信号质量大于或等于第一质量阈值；或者Uu接口的信号质量大于第一质量阈值，或者Uu接口的信噪比大于或等于第一信噪比阈值；或者Uu接口的信噪比大于第一信噪比阈值。
显然，上述第一预设条件可以同时依据信号质量、信号强度以及信噪比中的2种或3种，不予限制。
302、接入网设备根据连接方式偏好信息，向第一终端设备发送路径切换信息。
其中，路径切换信息可以用于切换第一终端设备与接入网设备之间的连接方式。
具体地，本申请中的路径切换信息可以为第一终端设备与接入网设备之间的目标连接方式，即第一终端设备即将切换到的与接入网设备之间的连接方式。目标连接方式例如可以是Uu接口和PC5接口双连接，Uu接口单连接或PC5接口单连接中的一种。本申请中的路径切换信息也可以为用于指示第一终端设备执行特定动作的指示信息。例如，释放连接，保持连接，建立连接等，该连接可以依据不同的连接方式有所不同，具体可以为PC5接口连接，Uu接口连接。
可选的，在步骤302中，接入网设备根据连接方式偏好信息所指示的连接方式偏好与第一终端设备当前的连接方式，向第一终端设备发送路径切换信息。
例如，当连接方式偏好与第一终端设备当前的连接方式不同时，若连接方式偏好对应的接口的信号强度符合相应的信号强度要求，则接入网设备可以向第一终端设备发送路径切换信息，以指示第一终端设备通过连接方式偏好对应的连接方式与接入网设备连接，或者指示第一终端将其与接入网设备之间的连接方式切换为连接方式偏好对应的连接方式。这样能够优先保证第一终端设备通过连接方式偏好对应的连接方式与接入网设备连接。
再例如，当连接方式偏好与第一终端设备当前的连接方式相同时，若连接方式偏好对应的接口的信号强度不符合相应的信号强度要求，则接入网设备也可以向第一终端设备发送路径切换信息，以指示第一终端设备切换为通过其他连接方式与接入网设备连接。具体地，该其他连接方式可以是指与连接方式偏好对应的连接方式不同的连接方式。这样能够保证第一终端设备与接入网设备之间连接的稳定性，保证数据传输成功的几率。
又例如，若连接方式偏好与第一终端设备当前的连接方式相同，且连接方式偏好对应的接口的信号强度符合相应的信号强度要求，则接入网设备可以不向第一终端设备发送路径切换信息。或者，若连接方式偏好与第一终端设备当前的连接方式不同，但是连接方式偏好对应的接口的信号强度不符合相应的信号强度要求，则接入网设备也可以不向第一终端设备发送路径切换信息。这样，保持第一终端设备的连接方式不变，进而能够保证第一终端设备与接入网设备数据传输的连续性，从而有助于保证业务连续性。
需要指出的是，本申请实施例中所提及的第一终端设备的连接方式，可理解为第一终端设备与接入网设备之间连接的连接方式。
本申请实施例的技术方案中，接入网设备根据第一终端设备的连接方式偏好信息，向第一终端设备发送路径切换信息，第一终端设备根据路径切换信息切换路径。这样第一终 端设备切换的连接方式，能够更好的符合第一终端设备的连接需求。
在一些可选的实施例中，在步骤301中，接入网设备从第一网络设备获取该第一终端设备的连接方式偏好信息，也可以从第一终端设备获取该第一终端设备的连接方式偏好信息。
其中，第一网络设备可以为AMF或SMF。
在一种可能的实现方式中，如图3B所示的流程示意图，步骤301包括：
3011、接入网设备接收来自第一网络设备的第一终端设备的连接方式偏好信息。
其中，第一网络设备可为AMF、SMF或其他网络设备。
具体地，当第一网络设备为AMF时，接入网设备可接收来自AMF的第一终端设备的连接方式偏好信息。例如，AMF可从UDM中获取第一终端设备的签约数据，并从第一终端设备的签约数据中获得第一终端设备的连接方式偏好信息，然后AMF向接入网设备发送第一终端设备的连接方式偏好信息。
具体地，当第一网络设备为SMF时，接入网设备可接收来自SMF的第一终端设备的连接方式偏好信息。例如，SMF可从UDM中获取第一终端设备的签约数据，并从第一终端设备的签约数据中获得第一终端设备的连接方式偏好信息，然后SMF向接入网设备发送第一终端设备的连接方式偏好信息。
需要说明的是，第一终端设备的签约数据可包括连接指示(connectivity indicator)，用于指示第一终端设备的连接方式偏好。进一步地，第一网络设备可根据第一终端设备的签约数据中的连接指示向接入网设备发送第一终端设备的连接方式偏好信息。
例如，该第一终端设备的签约数据中的连接指示双连接指示(dual connectivity indicator)。该双连接指示用于指示第一终端设备的连接方式偏好为Uu接口和PC5接口双连接。第一网络设备可根据该双连接指示，向接入网设备发送第一终端设备的连接方式偏好信息，该连接方式偏好信息用于指示Uu接口和PC5接口双连接。
又例如，该第一终端设备的签约数据中的连接指示为PC5偏好指示(PC5preference indicator)。该PC5偏好指示用于指示第一终端设备的连接方式偏好为PC5接口单连接。第一网络设备可根据该PC5偏好指示，向接入网设备发送第一终端设备的连接方式偏好信息，该连接方式偏好信息指示PC5接口单连接。
再例如，该第一终端设备的签约数据中的连接指示为Uu偏好指示(Uu preference indicator)。该Uu偏好指示用于指示第一终端设备的连接方式偏好为Uu接口单连接。第一网络设备可根据该Uu偏好指示，向接入网设备发送第一终端设备的连接方式偏好信息，该连接方式偏好信息指示Uu接口单连接。
在另一些可选的实施例中，步骤301中，接入网设备从第一终端设备获取连接方式偏好信息。
具体地，如图3C所示的流程示意图，步骤301包括：
3012、接入网设备接收来自第一终端设备的连接方式偏好信息。
这样，第一终端设备向接入网设备上报连接方式偏好信息，能够使得接入网设备根据 第一终端设备上报的连接方式偏好信息，指示第一终端设备切换连接方式，从而使得第一终端设备切换的连接方式更加符合第一终端设备的连接需求。
可选的，该连接方式偏好信息携带在测量报告中。这样，第一终端设备通过在测量报告中携带连接方式偏好信息的方式，向接入网设备发送连接方式偏好信息，能够节省信令开销。
例如，第一终端设备可向接入网设备发送测量报告，测量报告中包括连接方式偏好信息。
关于步骤302，本申请实施例提供以下几种可能的实现方式。
方式一：
连接方式偏好信息所指示的连接方式偏好为Uu接口和PC5接口双连接。如图3D所示的流程示意图，步骤302可包括：
3021、当连接方式偏好为Uu接口和PC5接口双连接时，若第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，且第一终端设备的Uu接口的信号满足第一预设条件，则接入网设备确定将第一终端设备与接入网设备之间的连接方式切换为Uu接口和PC5接口双连接。
第一预设条件的相关补充说明请参考上述实施例，此处不再赘述。
3022、接入网设备向第一终端设备发送路径切换信息。
其中，该路径切换信息可以包括第一指示信息；第一指示信息用于指示：第一终端设备建立与接入网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接；或者，该路径信息也可以为第一终端设备与接入网设备之间的目标连接方式，该目标连接方式为Uu接口和PC5接口双连接。
需要指出的是，本申请中提及的保持也可以指的是不释放，不予限制。例如，保持第一终端设备与中继设备之间的PC5接口连接，可理解为不释放第一终端设备与中继设备之间的PC5接口连接。
例如，如图4A的场景示意图，假设第一终端设备位于无线网络的覆盖区域之外，且第一终端设备通过中继设备与接入网设备连接，那么当第一终端设备从无线网络的覆盖区域之外移动至无线网络的覆盖区域内，且第一终端设备的Uu接口的信号满足第一预设条件时，若第一终端设备的连接方式偏好为Uu接口和PC5接口双连接，接入网设备可向第一终端设备发送该第一指示信息。相应地，第一终端设备根据该第一指示信息，将连接方式切换为Uu接口和PC5接口双连接，从而使得第一终端设备不但能够通过PC5接口继续传输未完成传输的业务数据，还能够利用Uu接口传输数据，保证业务连续性。这样的连接方式能够满足对连续性要求较高的业务的需求。
应理解，在一些可选的实施例中，上述步骤3021和步骤3022也可以合并为：
当第一终端设备的连接方式偏好为Uu接口和PC5接口双连接时，若第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，且第一终端设备的Uu接口的信号满足第一预设条件，则接入网设备向第一终端设备发送路径切换信息。
可选的，请继续参阅图3D，在步骤3022之前，步骤302还包括：
3023、接入网设备根据第一终端设备的路径支持能力信息，确定第一终端设备支持Uu接口和PC5接口双连接。
其中，第一终端设备的路径支持能力信息可以指示第一终端设备支持的连接方式。
这样，接入网设备在指示第一终端设备切换到Uu接口和PC5接口双连接之前，先确定第一终端设备是否支持Uu接口和PC5接口双连接，这样能够避免在接入网设备向第一终端设备发送第一指示信息之后，第一终端设备无法根据第一指示消息进行Uu接口和PC5接口双连接。
在一种可能的实现方式中，连接方式偏好信息包括路径支持能力信息，或者连接方式偏好信息与路径支持能力信息可以为同一种信息。也即，连接方式偏好信息指示第一终端设备的连接方式偏好，还指示第一终端设备支持的连接方式。或者说，连接方式偏好是指第一终端设备支持的连接能力。
在另一种可能的实现方式中，连接方式偏好信息不包括路径支持能力信息。在步骤3023之前，接入网设备可以获取第一终端设备的路径支持能力信息。接入网设备可以从第一终端设备或第一网络设备获取该路径支持能力信息。
可选的，接入网设备从第一终端设备获取路径支持能力信息。该路径支持能力信息可以携带在第一终端设备向接入网设备发送的测量报告中。这样能够节省信令开销。
可选的，接入网设备从第一网络设备获取路径支持能力信息。第一终端设备可以在注册请求中携带路径支持能力信息，该路径支持能力信息经接入网设备转发至存储用户签约数据的数据库。其中，第一网络设备可以为核心网设备，例如，AMF或SMF等，不予限制。
具体地，第一网络设备可从第一终端设备的签约数据中获得该路径支持能力信息。例如，第一网络设备可以从存储用户签约数据的数据库中获取第一终端设备的签约数据。该签约数据包括该第一终端设备的路径支持能力信息。第一网络设备从签约数据中获得该路径支持能力信息。
其中，存储用户签约数据的数据库可以为UDM，或者归属订阅服务器(home subscribe server，HSS)，不予限制。
应理解，在一些可选的实施例中，上述步骤3021-3023也可以合并为：
当第一终端设备的连接方式偏好为Uu接口和PC5接口双连接，且第一终端设备支持Uu接口和PC5接口双连接时，若第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，且第一终端设备的Uu接口的信号满足第一预设条件，则接入网设备向第一终端设备发送步骤3022中的路径切换信息。
方式二：
连接方式偏好信息所指示的连接方式偏好为Uu接口和PC5接口双连接。如图3E所示的流程示意图，步骤302可包括：
3024、当连接方式偏好为Uu接口和PC5接口双连接时，若第一终端设备与接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，且第一终端设备的Uu接口的信号满足第二预设条件，则接入网设备确定将第一终端设备与接入网设备之间的连接方式切 换为PC5接口单连接。
该第二预设条件可以依据以下至少一种：信号强度，信号质量，或信噪比。
例如，第二预设条件可以是以下一种：
Uu接口的信号强度小于或等于第一强度阈值；或者Uu接口的信号强度小于第一强度阈值；或者Uu接口的信号质量小于或等于第一质量阈值；或者Uu接口的信号质量小于第一质量阈值，或者Uu接口的信噪比小于或等于第一信噪比阈值；或者Uu接口的信噪比小于第一信噪比阈值。
具体地，若第一预设条件是Uu接口的信号强度大于或等于第一强度阈值，那么第二预设条件可以是Uu接口的信号强度小于第一强度阈值；若第一预设条件是Uu接口的信号强度大于第一强度阈值，那么第二预设条件可以是Uu接口的信号强度小于或等于第一强度阈值。
若第一预设条件是Uu接口的信号质量大于或等于第一质量阈值，那么第二预设条件可以是Uu接口的信号质量小于第一质量阈值；若第一预设条件是Uu接口的信号质量大于第一质量阈值，那么第二预设条件可以是Uu接口的信号质量小于或等于第一质量阈值。
若预设条件是Uu接口的信噪比大于或等于第一信噪比阈值，那么第二预设条件可以是Uu接口的信噪比小于第一信噪比阈值；若预设条件是Uu接口的信噪比大于第一信噪比阈值，那么第二预设条件可以是Uu接口的信噪比小于或等于第一信噪比阈值。
显然，上述第二预设条件可以同时依据信号质量、信号强度以及信噪比中的2种或3种，不予限制。
3025、接入网设备向第一终端设备发送路径切换信息。
其中，该路径换信息可以包括第二指示信息。第二指示信息用于指示：第一终端设备释放与接入网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接。或者，该路径信息也可以为第一终端设备与接入网设备之间的目标连接方式，该目标连接方式为PC5接口单连接。
例如，如图4B的场景示意图，假设第一终端设备位于无线网络的覆盖区域内，且第一终端设备与接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，那么当第一终端设备从无线网络的覆盖区域内移动至无线网络的覆盖区域之外时，第一终端设备的Uu接口的信号强度可能会不符合Uu接口的信号强度要求。这种场景下，若第一终端设备的连接方式偏好为Uu接口和PC5接口双连接，接入网设备可向第一终端设备发送该第二指示信息。相应地，第一终端设备根据该第二指示信息，切换为PC5接口单连接(具体地，第一终端设备释放与接入网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接)，能够避免因Uu接口信号强度较弱，而导致数据传输中断，从而能够提升数据传输成功的几率。
应理解，上述步骤3021-3023，与步骤3024-3025可以在同一个实施例中实施，或者一个实施例中可以仅实施步骤3021-3023，或者一个实施例中可以仅实施步骤3024-3025。
可选的，步骤3024和3035可以合并为：
当连接方式偏好为Uu接口和PC5接口双连接时，若第一终端设备与接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，且第一终端设备的Uu接口的信号满足 第二预设条件，则接入网设备向第一终端设备发送步骤3025中的路径切换信息。
显然，在上述步骤3024-3025的基础上，还可以结合第一终端设备的路径支持能力信息，可以参考上述步骤3023的相关描述。例如，当连接方式偏好为Uu接口和PC5接口双连接，且第一终端设备支持PC5接口单连接时，若第一终端设备与接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，且第一终端设备的Uu接口的信号满足第二预设条件，则接入网设备向第一终端设备发送步骤3025中的路径切换信息。
方式三：
连接方式偏好信息所指示的连接方式偏好为Uu接口单连接。如图3F所示的流程示意图，步骤302可包括：
3026、当连接方式偏好为Uu接口单连接时，若第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，且第一终端设备的Uu接口的信号满足第一预设条件，则接入网设备确定将第一终端设备与接入网设备的连接方式切换为Uu接口单连接。
第一预设条件的相关补充说明请参考上述实施例，此处不再赘述。
3027、接入网设备向第一终端设备发送路径切换信息。
其中，该路径换信息可以包括第三指示信息；第三指示信息用于指示：第一终端设备建立与接入网设备之间的Uu接口连接，并释放第一终端设备与中继设备之间的PC5接口连接；或者，该路径信息也可以为第一终端设备与接入网设备之间的目标连接方式，该目标连接方式为Uu接口单连接。
例如，如图4C的场景示意图，假设第一终端设备位于无线网络的覆盖区域之外，且第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，那么当第一终端设备从无线网络的覆盖区域之外移动至无线网络的覆盖区域内时，第一终端设备的Uu接口的信号强度可能会符合Uu接口的信号强度要求。这种场景下，若第一终端设备的连接方式偏好为Uu接口单连接，接入网设备向第一终端设备发送该第三指示信息。相应地，第一终端设备根据该第三指示信息，切换为Uu接口单连接(具体地，第一终端设备建立与接入网设备之间的Uu接口连接，并释放第一终端设备与中继设备之间的PC5接口连接)，从而能够提升数据传输效率。这样的连接方式能够满足对数据传输效率较高的业务的需求。
可选的，步骤3026和步骤3027可以合并为：
当连接方式偏好为Uu接口单连接时，若第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，且第一终端设备的Uu接口的信号满足第一预设条件，则接入网设备向第一终端设备发送步骤3207中的路径切换信息。
显然，在上述步骤3026-3027的基础上，还可以结合第一终端设备的路径支持能力信息，可以参考上述步骤3023的相关描述。例如，当连接方式偏好为Uu接口单连接，且第一终端设备支持Uu接口单连接时，若第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，且第一终端设备的Uu接口的信号满足第一预设条件，则接入网设备向第一终端设备发送步骤3027中的路径切换信息。
方式四：
连接方式偏好信息所指示的连接方式偏好为Uu接口单连接。如图3G所示的流程示意图，在另一些可能的实现方式中，步骤302可包括：
3028、当连接方式偏好为Uu接口单连接时，若第一终端设备与接入网设备之间当前使用的连接方式为Uu接口单连接，且第一终端设备的Uu接口的信号满足第二预设条件，则接入网设备确定切换第一终端设备与接入网设备的连接方式为PC5接口单连接。
第二预设条件的相关补充说明请参考上述实施例，此处不再赘述。
3029、接入网设备向第一终端设备发送路径切换信息。
其中，该路径换信息可以包括第四指示信息；第四指示信息用于指示：第一终端设备建立与中继设备之间的PC5接口连接，并释放第一终端设备与接入网设备之间的Uu接口连接。或者，该路径切换信息也可以为第一终端设备与接入网设备之间的目标连接方式，该目标连接方式为PC5接口单连接。
例如，如图4D的场景示意图，假设第一终端设备位于无线网络的覆盖区域内，且第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，那么当第一终端设备从无线网络的覆盖区域内，移动至无线网络的覆盖区域之外时，第一终端设备的Uu接口的信号强度可能会符合Uu接口的信号强度要求。这种场景下，若第一终端设备的连接方式偏好为Uu接口单连接，接入网设备向第一终端设备发送第四指示信息。相应地，第一终端设备根据该第四指示信息，切换为PC5接口单连接(具体地，第一终端设备释放与接入网设备之间的Uu接口连接，并建立与中继设备之间的PC5接口连接)，从而能够避免因Uu接口信号强度较弱，而导致数据传输中断，提升数据传输成功的几率。
可选的，步骤3028和步骤3029可以合并为：
当连接方式偏好为Uu接口单连接时，若第一终端设备与接入网设备之间当前使用的连接方式为Uu接口单连接，且第一终端设备的Uu接口的信号满足第二预设条件，则接入网设备向第一终端设备发送步骤3029中的路径切换信息。
显然，在上述步骤3028-3029的基础上，还可以结合第一终端设备的路径支持能力信息，可以参考上述步骤3023的相关描述。例如，当第一终端设备支持PC5接口单连接时，若第一终端设备与接入网设备之间当前使用的连接方式为Uu接口单连接，且第一终端设备的Uu接口的信号满足第二预设条件，则接入网设备向第一终端设备发送步骤3029中的路径切换信息。
应理解，本申请中，图3B-图3G对应的实施例可分别单实施；图3B对应的实施例或图3C对应的实施例中的一个实施例，也可以与图3D-图3G中的任一个对应的实施例结合实施。
若连接方式偏好信息所指示的连接方式偏好为PC5接口单连接，接入网设备确定第一终端设备保持PC5接口连接，不需要切换连接方式，接入网设备不发送路径切换信息。如图4E所示的场景示意图，第一终端设备从无线网络的覆盖区域之外时，第一终端设备与网络设备的连接方式为PC5接口单连接。当第一终端设备从无线网络的覆盖区域之外，移动至无线网络的覆盖区域内时，保持PC5接口单连接，能够在第一终端设备移动的过程中， 始终通过PC5接口传输业务数据，能够较好地保证业务连续性。这样的连接方式能够满足对连续性要求高的业务的需求。
如图5A所示的流程示意图，本申请实施例还提供一种连接方法，如下。
501、第一网络设备获取第一终端设备的连接方式偏好信息。
其中，连接方式偏好信息指示第一终端设备的连接方式偏好。
例如，连接方式偏好信息指示第一终端设备的连接方式偏好为Uu接口和PC5接口双连接；或者指示第一终端设备的连接方式偏好为Uu接口单连接，或者指示第一终端设备的连接方式偏好为PC5接口单连接。
上述实施例中关于连接方式偏好的相关描述也适用于本实施例，此处不再赘述。
第一网络设备可以为核心网设备，例如，AMF或SMF等，不予限制。
第一网络设备可从第一终端设备的签约数据中获得该连接方式偏好信息。第一网络设备获得第一终端设备的签约数据的方式可以参考上述实施例中的相关描述，此处不再赘述。
502、第一网络设备向接入网设备发送连接方式偏好信息。
可选的，连接方式偏好信息可以携带在上下文转移(context transfer)消息中。例如，第一网络设备可向接入网设备发送上下文转移消息，该上下文转移消息包括连接方式偏好信息。有助于节省信令开销。
本申请实施例中，接入网设备能够根据第一网络设备发送的连接方式偏好信息，指示第一终端设备切换连接方式，从而使得第一终端设备切换的连接方式更加符合第一终端的连接需求。
可选的，如图5B所示的流程示意图，步骤501包括：
5011、第一网络设备获取第一终端设备的签约数据。
5012、第一网络设备根据第一终端设备的签约数据，得到连接方式偏好信息。
第一网络设备根据第一终端设备的签约数据，得到连接方式偏好信息的具体实现方式以及举例可参考上述实施例，此处不再赘述。
如此，第一网络设备能够获得第一终端设备的连接方式偏好信息，并向接入网设备发送该连接方式偏好信息，以使得接入网设备能够根据该连接方式偏好信息，向第一终端设备发送路径切换信息。
如图5C所示的流程示意图，在一种可选的实施例中，第一网络设备为AMF，步骤501之前，连接方法还可以包括：
503、AMF接收来自第一终端设备的注册请求。
其中，注册请求包括第一终端设备的路径支持能力信息，路径支持能力信息指示第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口单连接，或PC5接口单连接。
上述实施例中关于路径支持能力信息可以参考的相关描述也适用于本实施例，此处不再赘述。
该注册请求可以是第一终端设备发送给接入网设备，由接入网设备转发给AMF的。
如此，第一终端设备在注册请求中携带路径支持能力信息，以向AMF上报该路径支持能力信息，使得接入网设备能够从AMF获得该路径支持能力信息。
需要说明的是，上述图5B对应的实施例和图5C对应的实施例可以结合实施，也可以各自单独实施，本申请不作限制。
如图6A所示的流程示意图，本申请实施例还提供一种连接方法，如下。
601、第一终端设备确定连接方式偏好。
具体地，第一终端设备可根据业务场景和预期移动轨迹中的一种或多种，确定连接方式偏好。
例如，若第一终端设备的业务场景需要保证数据传输的可靠性，也需要保证较快的传输效率，那么第一终端设备可确定连接方式偏好为Uu接口和PC5接口双连接。
又例如，若业务场景更需要保证数据传输效率，第一终端设备的预期移动轨迹大部分处于无线网络的覆盖范围内，那么第一终端设备可确定连接方式偏好为Uu接口单连接。
再例如，若第一终端设备的业务场景需要优先保证数据传输的可靠性，那么第一终端设备可确定连接方式偏好为PC5接口单连接。
602、第一终端设备向接入网设备发送连接方式偏好信息，连接方式偏好信息指示第一终端设备的连接方式偏好。
连接方式偏好信息指示第一终端设备的连接方式偏好为Uu接口和PC5接口双连接；或者指示第一终端设备的连接方式偏好为Uu接口单连接，或者指示第一终端设备的连接方式偏好为PC5接口单连接。
该连接方式偏好信息可携带在测量报告中。例如，第一终端设备向接入网设备发送测量报告，该测量报告包括连接方式偏好信息。
可选的，测量报告还包括第一终端设备的Uu接口的信号强度。
这样，第一终端设备自行确定连接方式偏好，并在测量报告中携带连接方式偏好信息，使得接入网设备能够根据第一终端设备自行确定的连接方式偏好，指示第一终端设备切换连接方式，从而能够使得第一终端设备的连接方式能够更好地符合自身的连接需求。
如图6B所示的流程示意图，在一些可选的实施例中，连接方法还包括：
603、第一终端设备接收来自接入网设备的路径切换信息。
其中，路径切换信息可以用于切换第一终端设备与接入网设备之间的连接方式。
上述实施例中关于路径切换信息的相关说明也适用于本实施例，本实施例不再赘述。
604、第一终端设备根据路径切换信息，切换第一终端设备与接入网设备之间的连接方式；
在一些可选的实施例中，路径切换信息包括指示信息。
具体地，路径切换信息包括第一指示信息，第一指示信息用于指示：第一终端设备建立与接入网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接；或
路径切换信息包括第二指示信息，第二指示信息用于指示：第一终端设备释放与接入 网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接；或
路径切换信息包括第三指示信息，第三指示信息用于指示：第一终端设备建立与接入网设备之间的Uu接口连接，并释放第一终端设备与中继设备之间的PC5接口连接；或
路径切换信息包括第四指示信息，第四指示信息用于指示：第一终端设备建立与中继设备之间的PC5接口连接，并释放第一终端设备与接入网设备之间的Uu接口连接。
关于第一指示信息、第二指示信息、第三指示信息以及第四指示参考信息可以参考上述实施例中的相关描述，不再赘述。
在另一些可选的实施例中，路径切换信息可以为第一终端设备与接入网设备之间的目标连接方式，即第一终端设备即将切换到的与接入网设备之间的连接方式。目标连接方式例如可以是Uu接口和PC5接口双连接，Uu接口单连接或PC5接口单连接中的一种。
如此，第一终端设备接收到的路径切换信息，是接入网设备根据第一终端设备上报的连接方式偏好方式确定的，第一终端设备根据该路径切换信息，切换第一终端设备与接入网设备之间的连接方式，能够更好地符合自身的连接需求。
具体地，关于步骤604，本申请实施例提供一下几种可能的实现方式。
方式一：
路径切换信息包括第一指示信息，如图6C所示的流程示意图，步骤604可包括：
6041、第一终端设备根据路径切换信息中的第一指示信息，建立与接入网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接。
这样，如图4A所示的场景示意图，假设第一终端设备位于无线网络的覆盖区域之外，且第一终端设备通过中继设备与接入网设备连接，那么当第一终端设备从无线网络的覆盖区域之外移动至无线网络的覆盖区域内，且第一终端设备的Uu接口的信号满足第一预设条件时，第一终端设备能够根据路径切换信息中的第一指示信息，将连接方式切换为Uu接口和PC5接口双连接，从而使得第一终端设备不但能够通过PC5接口继续传输未完成传输的业务数据，还能够利用Uu接口传输数据，保证业务连续性。这样的连接方式能够满足对连续性要求较高的业务的需求。
方式二：
路径切换信息包括第二指示信息，如图6D所示的场景示意图，步骤604可包括：
6042、第一终端设备根据路径切换信息中的第二指示信息，释放与接入网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接。
如图4B的场景示意图，假设第一终端设备位于无线网络的覆盖区域内，且第一终端设备与接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，那么当第一终端设备从无线网络的覆盖区域内移动至无线网络的覆盖区域之外时，第一终端设备的Uu接口的信号强度可能会不符合Uu接口的信号强度要求。这种场景下，若第一终端设备的连接方式偏好为Uu接口和PC5接口双连接，接入网设备可向第一终端设备发送该第二指示信息。相应地，第一终端设备根据该第二指示信息，切换为PC5接口单连接(具体地，第一终端设备释放与接入网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接)，能够避免因Uu接口信号强度较弱，而导致数据传输中断，从而能够 提升数据传输成功的几率。
方式三：
路径切换信息包括第三指示信息，如图6E所示的场景示意图，步骤604可包括：
6043、第一终端设备根据路径切换信息中的第三指示信息，建立与接入网设备之间的Uu接口连接，并释放与中继设备之间的PC5接口连接。
如图4C所示的场景示意图，假设第一终端设备位于无线网络的覆盖区域之外，且第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，那么当第一终端设备从无线网络的覆盖区域之外移动至无线网络的覆盖区域内时，第一终端设备的Uu接口的信号强度可能会符合Uu接口的信号强度要求。这种场景下，若第一终端设备的连接方式偏好为Uu接口单连接，接入网设备向第一终端设备发送该第三指示信息。相应地，第一终端设备根据该第三指示信息，切换为Uu接口单连接(具体地，第一终端设备建立与接入网设备之间的Uu接口连接，并释放第一终端设备与中继设备之间的PC5接口连接)，从而能够提升数据传输效率。这样的连接方式能够满足对数据传输效率较高的业务的需求。
方式四：
路径切换信息包括第四指示信息，如图6F所示的场景示意图，步骤604可包括：
6044、第一终端设备根据路径切换信息中的第四指示信息，释放接入网设备之间的Uu接口连接，并建立与中继设备之间的PC5接口连接。
这样，如图4D的场景示意图，假设第一终端设备位于无线网络的覆盖区域内，且第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，那么当第一终端设备从无线网络的覆盖区域内，移动至无线网络的覆盖区域之外时，第一终端设备的Uu接口的信号强度可能会符合Uu接口的信号强度要求。这种场景下，若第一终端设备的连接方式偏好为Uu接口单连接，接入网设备向第一终端设备发送第四指示信息。相应地，第一终端设备根据该第四指示信息，切换为PC5接口单连接(具体地，第一终端设备释放与接入网设备之间的Uu接口连接，并建立与中继设备之间的PC5接口连接)，从而能够避免因Uu接口信号强度较弱，而导致数据传输中断，提升数据传输成功的几率。
可选的，路径切换信息可为第一终端设备与接入网设备之间的目标连接方式，步骤604中，第一终端设备可将连接方式切换为该目标连接方式。例如，第一终端设备与接入网设备之间的目标连接方式为Uu接口和PC5接口双连接，则第一终端设备根据路径切换信息，将第一终端设备与接入网设备之间的连接方式，切换为Uu接口和PC5接口双连接。又例如，第一终端设备与接入网设备之间的目标连接方式为Uu接口单连接，则第一终端设备根据路径切换信息，将第一终端设备与接入网设备之间的连接方式，切换为Uu接口单连接。再例如，第一终端设备与接入网设备之间的目标连接方式为PC5接口单连接，则第一终端设备根据路径切换信息，将第一终端设备与接入网设备之间的连接方式，切换为PC5接口单连接。
如图6G所示的流程示意图，在一些可选的实施例中，连接方法还包括：
605、第一终端设备向AMF发送注册请求。
注册请求包括所述第一终端设备的路径支持能力信息，其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口连接，或PC5接口连接。
例如，第一终端设备可向接入网设备发送注册请求，接入网设备将该注册请求转发给AMF。
步骤605在步骤602之前执行。具体地，步骤605可以在步骤601之前执行，也可以在步骤601之后、步骤602之前执行，也可以与步骤601同时执行。
这样，AMF能够获得该路径支持能力信息，并向接入网设备发送该路径支持能力信息，使得接入网设向第一终端设备发送路径切换信息之前，先确定第一终端设备具备路径切换信息所指示的目标连接方式的能力，避免因第一终端设备不具备路径切换信息所指示的目标连接方式的能力而导连接方式切换失败。
可以理解，图6G对应的实施例，可与单独实施，也可与上述图6A-图6F对应的实施例中的任一实施例结合实施。
为了更好地阐述本申请的技术方案，下面提供一些更详细的实施例。
如图7A的流程示意图，在一些实施例中，连接方法可包括以下步骤：
701、第一终端设备向接入网设备发送注册请求。
702、接入网设备向AMF发送该注册请求。
具体地，接入网设备可以为第一终端设备选择合适的AMF，并向该AMF发送该注册请求。
接入网设备可以不读取或者不解析该注册请求。
应理解，步骤701和步骤702为本申请实施例的可选步骤。
703、AMF获取第一终端设备的连接方式偏好信息。
其中，第一终端设备的连接方式偏好信息可以参考上述实施例中的相关描述，不再赘述。
具体地，AMF可通过订阅检索的方式，从UDM获取该第一终端设备的签约数据，从签约数据中得到连接方式偏好信息。这样，AMF能够从UDM的签约数据中，获得第一终端设备的连接方式偏好信息，并向接入设备发送该连接方式偏好信息，使得接入网设备能够根据第一终端设备的连接方式偏好信息，向终端设备发送路径切换信息。
其中，连接方式偏好可以参考上述实施例中的相关描述，不再赘述。
704、AMF向接入网设备发送连接方式偏好信息；
其中，该连接方式偏好信息可以携带在上下文转移(context transfer)消息中。例如，AMF可向接入网设备发送上下文转移消息，该上下文转移消息包括连接方式偏好信息。在上下文转移消息携带连接方式偏好信息，有助于节省信令开销。
这样，接入网设备能够根据AMF发送的连接方式偏好信息，指示第一终端设备切连接方式，从而使得第一终端设备切换的连接方式更加符合第一终端的连接需求。
705、第一终端设备向接入网设备发送测量报告。
其中，该测量报告可以包括PC5接口的信号强度和/或Uu接口的信号强度。
706、接入网设备根据连接方式偏好信息和测量报告，向第一终端设备发送路径切换信息。
其中，该路径切换信息可以用于切换所述第一终端设备与所述接入网设备之间的连接方式。
具体地，该路径切换信息可以为第一终端设备的目标连接方式，参见上述实施例中的相关描述，不再赘述。该路径切换信息也可以为用于指示第一终端设备执行特定动作的指示信息，具体的指示信息参见上述实施例中的相关描述，不再赘述。
707、第一终端设备根据路径切换信息，切换第一终端设备与接入网设备之间的连接方式。
在一些可选的实施例中，测量报告包括Uu接口的信号强度。
关于步骤706和707，本申请提供以下几种可能的实现方式。
方式一：
连接方式偏好为Uu接口和PC5接口双连接。基于图7A的流程示意图对应的实施例，如图7B的流程示意图，在一种可能的实现方式中，步骤706可以包括：
7061、当连接方式偏好为Uu接口和PC5接口双连接时，若第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，且第一终端设备的Uu接口的信号满足第一预设条件，则接入网设备确定将第一终端设备与接入网设备之间的连接方式切换为Uu接口和PC5接口双连接。
7062、接入网设备向第一终端设备发送路径切换信息，该路径切换信息包括第一指示信息。
上述实施例中的步骤3021和步骤3022的相关补充说明以及技术效果，也适用于本实施例中的步骤7061和步骤7062，此处不再赘述。
步骤707可包括：
7071、第一终端设备根据路径切换信息中的第一指示信息，建立与接入网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接。
上述实施例中的步骤6041的相关补充说明以及技术效果，也适用于本实施例中的步骤7071，此处不再赘述。
可选的，注册请求中，包括路径支持能力信息。路径支持能力信息指示第一终端设备支持Uu接口和PC5接口双连接。如图7B的流程示意图，步骤7062之前，步骤706还可以包括：
7063、接入网设备根据第一终端设备的路径支持能力信息，确定第一终端设备支持Uu接口和PC5接口双连接。
上述实施例中的步骤3023的相关补充说明以及技术效果，也适用于本实施例中的步骤7063，此处不再赘述。
方式二：
连接方式偏好为Uu接口和PC5接口双连接。基于图7A的流程示意图对应的实施例，如图7C的流程示意图，在一种可能的实现方式中，步骤706可以包括：
7064、当连接方式偏好为Uu接口和PC5接口双连接时，若第一终端设备与接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，且第一终端设备的Uu接口的信号满足第二预设条件，则接入网设备确定将第一终端设备与接入网设备之间的连接方式切换为PC5接口单连接。
7065、接入网设备向第一终端设备发送路径切换信息，该路径换信息可以包括第二指示信息。
上述实施例中的步骤3024和步骤3025的相关补充说明以及技术效果，也适用于本实施例中的步骤7064和步骤7065，此处不再赘述。
步骤707可包括：
7072、第一终端设备根据路径切换信息中的第二指示信息，释放与接入网设备之间的Uu接口连接，并保持第一终端设备与中继设备之间的PC5接口连接。
上述实施例中的步骤6042的相关补充说明以及技术效果，也适用于本实施例中的步骤7072，此处不再赘述。
方式三：
连接方式偏好信息所指示的连接方式偏好为Uu接口单连接。基于图7A的流程示意图对应的实施例，如图7D的流程示意图，在一种可能的实现方式中，步骤706可以包括：
7066、当连接方式偏好为Uu接口单连接时，若第一终端设备与接入网设备之间当前使用的连接方式为PC5接口单连接，且第一终端设备的Uu接口的信号满足第一预设条件，则接入网设备确定将第一终端设备与接入网设备的连接方式切换为Uu接口单连接。
7067、接入网设备向第一终端设备发送路径切换信息，其中，该路径换信息可以包括第三指示信息。
上述实施例中的步骤3026和步骤3027的相关补充说明以及技术效果，也适用于本实施例中的步骤7066和步骤7067，此处不再赘述。
步骤707可包括：
7073、第一终端设备根据路径切换信息中的第三指示信息，建立与接入网设备之间的Uu接口连接，并释放与中继设备之间的PC5接口连接。
上述实施例中的步骤6043的相关补充说明以及技术效果，也适用于本实施例中的步骤7073，此处不再赘述。
方式四：
连接方式偏好信息所指示的连接方式偏好为Uu接口单连接。基于图7A的流程示意图对应的实施例，如图7E的流程示意图，在一种可能的实现方式中，步骤706可以包括：
7068、当连接方式偏好为Uu接口单连接时，若第一终端设备与接入网设备之间当前使用的连接方式为Uu接口单连接，且第一终端设备的Uu接口的信号满足第二预设条件，则接入网设备确定切换第一终端设备与接入网设备的连接方式为PC5接口单连接。
7069、接入网设备向第一终端设备发送路径切换信息，其中，该路径换信息可以包括第四指示信息。
上述实施例中的步骤3028和步骤3029的相关补充说明以及技术效果，也适用于本实施例中的步骤7068和步骤7069，此处不再赘述。
步骤707可包括：
7074、第一终端设备根据路径切换信息中的第四指示信息，释放接入网设备之间的Uu接口连接，并建立与中继设备之间的PC5接口连接。
上述实施例中的步骤6044的相关补充说明以及技术效果，也适用于本实施例中的步骤7074，此处不再赘述。
可选的，路径切换信息也可为第一终端设备与接入网设备之间的目标连接方式，步骤707中，第一终端设备可将连接方式切换为该目标连接方式。例如，第一终端设备与接入网设备之间的目标连接方式为Uu接口和PC5接口双连接，则第一终端设备根据路径切换信息，将第一终端设备与接入网设备之间的连接方式，切换为Uu接口和PC5接口双连接。又例如，第一终端设备与接入网设备之间的目标连接方式为Uu接口单连接，则第一终端设备根据路径切换信息，将第一终端设备与接入网设备之间的连接方式，切换为Uu接口单连接。再例如，第一终端设备与接入网设备之间的目标连接方式为PC5接口单连接，则第一终端设备根据路径切换信息，将第一终端设备与接入网设备之间的连接方式，切换为PC5接口单连接。
如图8的流程示意图，在另一些实施例中，连接方法可包括以下步骤：
801、SMF获取第一终端设备的连接方式偏好信息。
SMF可从UDM获取第一终端设备的连接方式偏好信息。
中继设备与接入网设备建立Uu接口连接的过程中，中继设备与SMF建立PDU会话时，SMF识别出第一终端设备正在通过中继设备，与接入网设备连接。然后，SMF可从UDM获取第一终端设备的连接方式偏好信息。
802、SMF向接入网设备发送连接方式偏好信息。
该连接方式偏好信息指示第一终端设备的连接方式偏好为Uu接口和PC5接口双连接；或该连接方式偏好信息指示第一终端设备的连接方式为Uu接口单连接，或该连接方式偏好信息指示第一终端设备的连接方式为PC5接口单连接。
可选的，连接方法还包括：
803、第一终端设备向接入网设备发送测量报告。
其中，该测量报告可以包括PC5接口的信号强度和/或Uu接口的信号强度。
804、接入网设备根据连接偏好信息和测量报告，向第一终端设备发送路径切换信息。
805、第一终端设备根据路径切换信息，切换第一终端设备与接入网设备之间的连接方式。
关于步骤804和步骤805的实现方式，可参考上述实施例中步骤706和步骤707的实现方式，此处不再赘述。
本实施例的技术方案中，SMF能够从UDM获得第一终端设备的连接方式偏好信息，并向接入设备发送该连接方式偏好信息，使得接入网设备能够根据第一终端设备的连接方式偏好信息，向第一终端设备发送路径切换信息。
如图9的流程示意图，连接方法可包括以下步骤：
901、第一终端设备确定连接方式偏好。
连接方式偏好为Uu接口和PC5接口双连接，或，Uu接口单连接，或PC5接口单连接。
第一终端设备可根据业务场景和预期移动轨迹中的一种或多种，确定连接方式偏好。
例如，若第一终端设备的业务场景需要保证数据传输的可靠性，也需要保证较快的传输效率，那么第一终端设备可确定连接方式偏好为Uu接口和PC5接口双连接。
又例如，若业务场景更需要保证数据传输效率，第一终端设备的预期移动轨迹大部分处于无线网络的覆盖范围内，那么可第一终端设备可确定连接方式偏好为Uu接口单连接。
再例如，若第一终端设备的业务场景需要优先保证数据传输的可靠性，那么第一终端设备可确定连接方式偏好为PC5接口单连接。
902、第一终端设备向接入网设备发送测量报告。
测量报告包括连接方式偏好信息；
连接方式偏好信息指示第一终端设备的连接方式偏好为Uu接口和PC5接口双连接；或者指示第一终端设备的连接方式偏好为Uu接口单连接，或者指示第一终端设备的连接方式偏好为PC5接口单连接。
测量报告还包括Uu接口的信号强度和/或PC5接口的信号强度。
可选的，测量报告包括Uu接口的信号强度。连接方法还可以包括步骤：
903、接入网设备根据测量报告中的连接偏好信息以及Uu接口的信号强度，向第一终端设备发送路径切换信息。
904、第一终端设备根据路径切换信息，切换第一终端设备与接入网设备之间的连接方式。
关于步骤903和步骤904的可能的实现方式，可参考上述实施例中步骤706和步骤707的可能的实现方式，此处不再赘述。
这样，本实施例的技术方案中，第一终端设备自行确定连接方式偏好，并在测量报告中携带连接方式偏好信息，能够使得接入网设备根据第一终端设备自行确定的连接方式偏好，指示第一终端设备切换连接方式，从而能够使得第一终端设备的连接方式能够更好地符合自身的连接需求。
下面提供一些装置实施例。
如图10所示的连接装置的结构示意图，本申请实施例还提供一种连接装置1000，该连接装置1000可以为接入网设备，或者部署在接入网设备。连接装置1000包括接收单元1001和发送单元1002；
接收单元1001用于获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；
发送单元1002用于根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息，所述路径切换信息用于切换所述第一终端设备与所述接入网设备的连接方式。
本申请实施例的技术方案中，连接装置根据第一终端设备的连接方式偏好信息，向第一终端设备发送路径切换信息，第一终端设备根据路径切换信息切换路径。这样第一终端设备切换的连接方式，能够更好的符合第一终端设备的连接需求。
在某些实施例中，所述连接方式偏好包括：Uu接口和PC5接口双连接；或者，Uu接口单连接；或者PC5接口单连接。
在某些实施例中，在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元1002具体用于：
当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则确定将所述第一终端设备与所述接入网设备之间的连接方式切换为Uu接口和PC5接口双连接；和
向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
在某些实施例中，所示连接装置还包括处理单元1003，处理单元1003用于根据所述第一终端设备的路径支持能力信息，确定所述第一终端设备支持Uu接口和PC5接口双连接。
在某些实施例中，在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元1002具体用于：
当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，且所述第一终端设备的Uu接口的信号满足第二预设条件，则确定将所述第一终端设备与所述接入网设备之间的连接方式切换为PC5接口单连接；和
向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
在某些实施例中，在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元1002具体用于：
当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则确定将所述第一终端设备与所述接入网设备的连接方式切换为Uu接口单连接；和
向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备之间的PC5接口连接。
在某些实施例中，在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径 切换信息方面，所述发送单元1002具体用于：
当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口单连接，且所述第一终端设备的Uu接口的信号满足第二预设条件，则确定切换所述第一终端设备与所述接入网设备的连接方式为PC5接口单连接；和
向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
在某些实施例中，在所述获取第一终端设备的连接方式偏好信息方面，所述接收单元1001具体用于：接收来自第一网络设备的所述连接方式偏好信息，所述第一网络设备为接入和移动管理功能设备或会话管理设备。
在某些实施例中，在所述获取第一终端设备的连接方式偏好信息方面，所述接收单元1001具体用于：接收来自所述第一终端设备的所述连接方式偏好信息。
可选的，所述连接方式偏好信息携带在测量报告中。
应理解，本申请实施例的连接方法中的相关补充说明及有益效果也使用与本申请实施例的连接装置1000，为避免冗余，此处不再赘述。
如图11所示的连接装置的结构示意图，本申请实施例还提供一种连接装置1100。该连接装置1100可以为第一网络设备，或者部署在第一网络设备。该第一网络设备可以为核心网设备，例如，AMF或SMF等，不予限制。连接装置1100包括：接收单元1101和发送单元1102；
接收单元1101用于获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；
发送单元1102，用于向接入网设备发送所述连接方式偏好信息。
这样，接入网设备能够根据该连接方式偏好信息，指示第一终端设备切连接方式，从而使得第一终端设备切换的连接方式更加符合第一终端的连接需求。
在某些实施例中，在所述获取第一终端设备的连接方式偏好信息方面，所述接收单元1101具体用于：
获取第一终端设备的签约数据，以及根据所述第一终端设备的签约数据，得到所述连接方式偏好信息。
在某些实施例中，所述接收单元1101还用于：
接收来自所述第一终端设备的注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息；
其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口单连接，或PC5接口单连接。
应理解，本申请实施例的连接方法中的相关补充说明及有益效果也使用与本申请实施例的连接装置1100，为避免冗余，此处不再赘述。
如图12所示的连接装置的结构示意图，本申请实施例还提供一种连接装置1200。该连接装置1200可以为第一终端设备，或者部署在第一终端设备。连接装置1200包括处理单元1201和发送单元1202，
处理单元1201用于确定连接方式偏好；
发送单元1202用于向接入网设备发送所述连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好。
这样，第一终端设备能够自行确定连接方式偏好，并向接入网设备发送指示该连接方式偏好的连接方式偏好信息，使得接入网设备根据第一终端设备自行确定的连接方式偏好，指示第一终端设备切换连接方式，从而能够使得第一终端设备的连接方式能够更好地符合自身的连接需求。
可选的，所述连接方式偏好信息携带在测量报告或注册请求中。
在某些实施例中，所述发送单元1202还用于：
向接入和移动管理功能设备发送注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息；
其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口单连接，或PC5接口单连接。
在某些实施例中，在所述确定连接方式偏好信息方面，所述处理单元1201具体用于：根据业务场景和预期移动轨迹中的一种或多种，确定所述连接方式偏好信息。
在某些实施例中，所述连接装置1200还包括：
接收单元1203，用于接收来自所述接入网设备的路径切换信息；
处理单元1201还用于根据所述路径切换信息，切换所述第一终端设备与所述接入网设备之间的连接方式；
所述路径切换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接；或
所述路径切换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接；或
所述路径切换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备之间的PC5接口连接；或
所述路径切换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
应理解，本申请实施例的连接方法中的相关补充说明及有益效果也使用与本申请实施例的连接装置1200，为避免冗余，此处不再赘述。
本申请实施例中的第一终端设备、接入网设备，或者第一网络设备的相关功能可以通 过图13中的通信设备1300来实现。图13所示为本申请实施例提供的通信设备1300的结构示意图。如图11所示，该通信设备1300可包括：处理器1301、收发器1305，可选的还包括存储器1302。
所述收发器1305可以称为收发单元、收发机、或收发电路等，用于实现收发功能。收发器1305可以包括接收器和发送器，接收器可以称为接收机、接收电路或接收单元等，用于实现接收功能；发送器可以称为发送机、发送电路或发送单元等。
存储器1302中可存储计算机程序或软件代码或指令1304，该计算机程序或软件代码或指令1304还可称为固件。处理器1301可通过运行其中的计算机程序或软件代码或指令1303，或通过调用存储器1302中存储的计算机程序或软件代码或指令1304，对MAC层和PHY层进行控制，以实现本申请下述各实施例提供的信号传输方法。其中，处理器1301可以为中央处理器(central processing unit，CPU)，存储器1302例如可以为只读存储器(read-only memory，ROM)，或为随机存取存储器(random access memory，RAM)。
本申请中描述的处理器1301和收发器1305可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路RFIC、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。
上述通信设备1300还可以包括天线1306，该通信设备1300所包括的各模块仅为示例说明，本申请不对此进行限制。
如前所述，以上实施例描述中的通信设备1300可以是第一终端设备、接入网网络设备或第一网络设备，但本申请中描述的通信设备的范围并不限于此，而且通信设备的结构可以不受图11的限制。通信设备可以是独立的设备或者可以是较大设备的一部分。例如所述通信设备的实现形式可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据，指令的存储部件；(3)可嵌入在其他设备内的模块；(4)接收机、智能终端、无线设备、手持机、移动单元、车载设备、云设备、人工智能设备等等；(5)其他等等。
对于通信设备的实现形式是芯片或芯片系统的情况，可参见图14所示的芯片的结构示意图。图14所示的芯片包括处理器和接口。其中，处理器的数量可以是一个或多个，接口的数量可以是多个。接口用于信号的接收和发送。可选的，该芯片或芯片系统可以包括存储器。存储器中用于保存芯片或芯片系统必要的程序指令和数据。
本申请实施例并且不限制权利要求书的保护范围和适用性。本领域技术人员可以在不脱离本申请实施例范围的情况下对本申请涉及的元件的功能和部署进行适应性更改，或酌情省略、替代或添加各种过程或组件。
在一种实现方式中，通信设备1300为上述方法实施例中的接入网设备，通信设备1300可通过处理器和收发器，实现本申请实施例中由接入网设备执行的任意一种方法的部分或全部步骤，例如：
收发器1305可用于获取第一终端设备的连接方式偏好信息，连接方式偏好信息指示所述第一终端设备的连接方式偏好；以及用于根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息，所述路径切换信息用于切换所述第一终端设备与所述接入网设备 的连接方式。
在另一种实现方式中，通信设备1300为上述方法实施例中的第一终端设备，通信设备1300可通过处理器和收发器，实现本申请实施例中由第一终端设备执行的任意一种方法的部分或全部步骤，例如：
处理器1301用于确定连接方式偏好；
收发器1305可用于向接入网设备发送所述连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好。
在又一种实现方式中，通信设备1300为上述方法实施例中的第一网络设备，通信设备1300可通过处理器和收发器，实现本申请实施例中由第一网络设备执行的任意一种方法的部分或全部步骤，例如：
收发器1305用于获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好，以及用于向接入网设备发送所述连接方式偏好信息。
本申请还提供一种通信系统，如图15所示的通信系统的架构示意图，通信系统包括上述任一实施例中的第一终端设备和接入网设备，可选的，该通信系统还可以包括上述任一实施例中的中继设备，该中继设备与接入网设备连接。该中继设备例如可以是中继终端设备。
可选的，如图15所示，该通信系统还可包括上述任一实施例中的第一网络设备。该第一网络设备可以为核心网设备，例如，AMF或SMF等，不予限制。
本申请还提供另一种通信系统，如图16所示的通信系统的架构示意图，该通信系统包括上述实施例中的连接装置1000和上述实施例中的连接装置1200。可选的，该通信系统还可以包括上述任一实施例中的中继设备，该中继设备与接入网设备或连接装置1000连接。该中继设备例如可以是中继终端设备。
可选的，如图16所示，该通信系统还可包括上述实施例中的连接装置1100。
本申请提供一种计算机可读存储介质，计算机可读存储介质中存储有计算机指令，计算机指令指示用户设备执行上述任一实施例的连接方法。
应理解，本申请实施例中提及的处理器可以是中央处理单元(Central Processing Unit，CPU)，还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)， 其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本申请实施例方法中的步骤可以根据实际需要进行顺序调整、合并和删减。
本申请实施例装置中的模块可以根据实际需要进行合并、划分和删减。
以上所述，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (36)

  1. 一种连接方法，其特征在于，包括：
    接入网设备获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；
    所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息，所述路径切换信息用于切换所述第一终端设备与所述接入网设备之间的连接方式。
  2. 根据权利要求1所述的方法，其特征在于，所述连接方式偏好包括：
    Uu接口和PC5接口双连接；或者，
    Uu接口单连接；或者
    PC5接口单连接。
  3. 根据权利要求1或2所述的方法，其特征在于，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息，包括：
    当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则所述接入网设备确定将所述第一终端设备与所述接入网设备之间的连接方式切换为Uu接口和PC5接口双连接；
    所述接入网设备向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
  4. 根据权利要求3所述的方法，其特征在于，所述接入网设备确定将所述第一终端设备与所述接入网设备之间的连接方式切换为Uu接口和PC5接口双连接之前，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息还包括：
    所述接入网设备根据所述第一终端设备的路径支持能力信息，确定所述第一终端设备支持Uu接口和PC5接口双连接。
  5. 根据权利要求1或2所述的方法，其特征在于，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息，包括：
    当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，且所述第一终端设备的Uu接口的信号满足第二预设条件，则所述接入网设备确定将所述第一终端设备与所述接入网设备之间的连接方式切换为PC5接口单连接；
    所述接入网设备向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
  6. 根据权利要求1或2所述的方法，其特征在于，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息包括：
    当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则所述接入网设备确定将所述第一终端设备与所述接入网设备的连接方式切换为Uu接口单连接；
    所述接入网设备向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备之间的PC5接口连接。
  7. 根据权利要求1或2任一项所述的方法，其特征在于，所述接入网设备根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息包括：
    当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口单连接，且所述第一终端设备的Uu接口的信号不满足第一预设条件，则所述接入网设备确定切换所述第一终端设备与所述接入网设备的连接方式为PC5接口单连接；
    所述接入网设备向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述接入网设备获取第一终端设备的连接方式偏好信息包括：
    所述接入网设备接收来自第一网络设备的所述连接方式偏好信息，所述第一网络设备为接入和移动管理功能设备或会话管理设备；或者，
    所述接入网设备接收来自所述第一终端设备的所述连接方式偏好信息。
  9. 一种连接方法，其特征在于，包括：
    第一网络设备获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；
    所述第一网络设备向接入网设备发送所述连接方式偏好信息。
  10. 根据权利要求9所述的方法，其特征在于，所述第一网络设备获取第一终端设备的连接方式偏好信息，包括：
    所述第一网络设备获取第一终端设备的签约数据；
    所述第一网络设备根据所述第一终端设备的签约数据，得到所述连接方式偏好信息。
  11. 根据权利要求9或10所述的方法，其特征在于，所述第一网络设备为接入和移动 管理功能设备，所述第一网络设备获取第一终端设备的连接方式偏好信息之前，所述方法还包括：
    所述接入和移动管理功能设备接收来自所述第一终端设备的注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息；
    其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口单连接，或PC5接口单连接。
  12. 一种连接方法，其特征在于，包括：
    第一终端设备确定连接方式偏好；
    所述第一终端设备向接入网设备发送所述连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好。
  13. 根据权利要求12所述的方法，其特征在于，所述连接方式偏好信息携带在测量报告中。
  14. 根据权利要求12或13所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备向接入和移动管理功能设备发送注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息；
    其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口连接，或PC5接口连接。
  15. 根据权利要求12-14任一项所述的方法，其特征在于，所述第一终端设备确定连接方式偏好，包括：
    所述第一终端设备根据业务场景和预期移动轨迹中的一种或多种，确定所述连接方式偏好。
  16. 根据权利要求12-15任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备接收来自所述接入网设备的路径切换信息；
    所述第一终端设备根据所述路径切换信息，切换所述第一终端设备与所述接入网设备之间的连接方式；
    其中，所述路径切换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接；或
    所述路径切换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接；或
    所述路径切换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备 之间的PC5接口连接；或
    所述路径切换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
  17. 一种连接装置，其特征在于，包括：
    接收单元，用于获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；
    发送单元，用于根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息，所述路径切换信息用于切换所述第一终端设备与所述接入网设备的连接方式。
  18. 根据权利要求17所示的装置，其特征在于，所述连接方式偏好包括：
    Uu接口和PC5接口双连接；或者，
    Uu接口单连接；或者
    PC5接口单连接。
  19. 根据权利要求17或18所述的装置，其特征在于，
    在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元具体用于：
    当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则确定将所述第一终端设备与所述接入网设备之间的连接方式切换为Uu接口和PC5接口双连接；和
    向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
  20. 根据权利要求19所述的装置，其特征在于，所示连接装置还包括处理器，所述处理器用于根据所述第一终端设备的路径支持能力信息，确定所述第一终端设备支持Uu接口和PC5接口双连接。
  21. 根据权利要求17或18所述的装置，其特征在于，
    在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元具体用于：
    当所述连接方式偏好为Uu接口和PC5接口双连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口和PC5接口双连接，且所述第一终端设备的Uu接口的信号不满足第一预设条件，则确定将所述第一终端设备与所述接入网设备之间的连接方式切换为PC5接口单连接；和
    向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接。
  22. 根据权利要求17或18所述的装置，其特征在于，
    在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元具体用于：
    当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为PC5接口单连接，且所述第一终端设备的Uu接口的信号满足第一预设条件，则确定将所述第一终端设备与所述接入网设备的连接方式切换为Uu接口单连接；和
    向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备之间的PC5接口连接。
  23. 根据权利要求17或18任一项所述的装置，其特征在于，
    在所述根据所述连接方式偏好信息，向所述第一终端设备发送路径切换信息方面，所述发送单元具体用于：
    当所述连接方式偏好为Uu接口单连接时，若所述第一终端设备与所述接入网设备之间当前使用的连接方式为Uu接口单连接，且所述第一终端设备的Uu接口的信号不满足第一预设条件，则确定切换所述第一终端设备与所述接入网设备的连接方式为PC5接口单连接；和
    向所述第一终端设备发送所述路径切换信息，所述路径换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
  24. 根据权利要求17-23任一项所述的装置，其特征在于，在所述获取第一终端设备的连接方式偏好信息方面，所述接收单元具体用于：
    接收来自第一网络设备的所述连接方式偏好信息，所述第一网络设备为接入和移动管理功能设备或会话管理设备；或者
    接收来自所述第一终端设备的所述连接方式偏好信息。
  25. 一种连接装置，其特征在于，包括：
    接收单元，用于获取第一终端设备的连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好；
    发送单元，用于向接入网设备发送所述连接方式偏好信息。
  26. 根据权利要求25所述的装置，其特征在于，在所述获取第一终端设备的连接方式 偏好信息方面，所述接收单元具体用于：
    获取第一终端设备的签约数据；和
    根据所述第一终端设备的签约数据，得到所述连接方式偏好信息。
  27. 根据权利要求25或26所述的装置，其特征在于，所述接收单元还用于：
    接收来自所述第一终端设备的注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息，所述路径支持能力信息指示所述第一终端设备支持Uu接口和PC5接口双连接，或指示所述第一终端设备支持Uu接口单连接或PC5接口单连接中的一种。
  28. 一种连接装置，其特征在于，包括：
    处理单元，用于确定连接方式偏好；
    发送单元，用于向接入网设备发送所述连接方式偏好信息，所述连接方式偏好信息指示所述第一终端设备的连接方式偏好。
  29. 根据权利要求28所述的装置，其特征在于，所述连接方式偏好信息携带在测量报告或注册请求中。
  30. 根据权利要求28或29所述的装置，其特征在于，所述发送单元还用于：
    向接入和移动管理功能设备发送注册请求，所述注册请求包括所述第一终端设备的路径支持能力信息；
    其中，所述路径支持能力信息指示所述第一终端设备支持以下一种或多种：Uu接口和PC5接口双连接，Uu接口单连接，或PC5接口单连接中的一种。
  31. 根据权利要求28-30任一项所述的装置，其特征在于，在所述确定连接方式偏好信息方面，所述处理单元具体用于：
    根据业务场景和预期移动轨迹中的一种或多种，确定所述连接方式偏好信息。
  32. 根据权利要求28-31任一项所述的装置，其特征在于，所述装置还包括：
    接收单元，用于接收来自所述接入网设备的路径切换信息；
    所述处理单元还用于根据所述路径切换信息，切换所述第一终端设备与所述接入网设备之间的连接方式；
    所述路径切换信息包括第一指示信息，所述第一指示信息用于指示：所述第一终端设备建立与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接；或
    所述路径切换信息包括第二指示信息，所述第二指示信息用于指示：所述第一终端设备释放与所述接入网设备之间的Uu接口连接，并保持所述第一终端设备与所述中继设备之间的PC5接口连接；或
    所述路径切换信息包括第三指示信息，所述第三指示信息用于指示：所述第一终端设 备建立与所述接入网设备之间的Uu接口连接，并释放所述第一终端设备与所述中继设备之间的PC5接口连接；或
    所述路径切换信息包括第四指示信息，所述第四指示信息用于指示：所述第一终端设备建立与所述中继设备之间的PC5接口连接，并释放所述第一终端设备与所述接入网设备之间的Uu接口连接。
  33. 一种通信设备，其特征在于，包括处理器，所述处理器与存储器耦合，所述存储器用于存储计算机指令，所述处理器执行该计算机指令，使得所述通信设备执行权利要求1-16任一项所述的方法。
  34. 一种通信系统，其特征在于，所述系统包括权利要求17～24中任一项所述的连接装置、权利要求25～27中任一项所述的连接装置、以及权利要求28～32中任一项所述的连接装置。
  35. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机指令，所述计算机指令指示通信设备执行权权利要求1-18中任一项所述的方法。
  36. 一种芯片，其特征在于，包括：处理器和接口，用于执行存储器中存储的计算机程序或指令，执行权利要求1-16中任一项所述的方法。
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