Communication method and apparatus for realizing service continuity

1. A communication method for realizing service continuity, the method being for a remote user equipment to reselect a communication link after a communication operation fails or to initially select a communication link, and comprising:

autonomously selecting, by the remote user equipment, a communication path communicating with the access network; and

communicating with the access network by the remote user equipment using the communication path,

wherein the communication path comprises at least one of:

communicating with the access network via a first interface, wherein the first interface is configured to directly connect the remote user equipment to the access network; and

communicating with the access network via a second interface, wherein the second interface is configured to connect the remote user equipment to the access network via a relay user equipment;

wherein the autonomously selecting, by the remote user equipment, a communication path communicating with the access network means that the remote user equipment selects the first interface or the second interface based on a pre-configured rule to communicate with the access network;

wherein the pre-configured rule is stored in a universal integrated circuit card (UICC) or a mobility equipment (ME) of the remote user equipment, or is received from the access network via a system broadcast message; and

wherein in a case that the communication path comprises communicating with the access network via the second interface, the method further comprises:

autonomously selecting or determining based on a second indication of the access network, by the remote user equipment, a communication technology used for communicating between the remote user equipment and the relay user equipment.

2. The method according to claim 1 , wherein the communication technology comprises at least one of:

a 3GPP-based transmission technology; and

a non-3GPP-based transmission technology.

3. The method according to claim 2 , wherein

the 3GPP-based transmission technology comprises: a device-to-device (D2D) technology; and/or

the non-3GPP-based transmission technology comprises at least one of: a Bluetooth technology, a WLAN/WiFi technology, an IrDA technology, a ZigBee technology, and other wireless communication technologies using an unlicensed frequency spectrum.

4. The method according to claim 1 , wherein the autonomously selecting or determining based on a second indication of the access network, by the remote user equipment, a communication technology used for communicating between the remote user equipment and the relay user equipment comprises at least one of:

transferring, by the remote user equipment, a 3GPP technology originally used by the second interface into a non-3GPP technology for transmission;

transferring, by the remote user equipment, a non-3GPP technology originally used by the second interface into a 3GPP technology for transmission;

transferring, by the remote user equipment, a 3GPP technology originally used by the second interface into another 3GPP technology for transmission; and

transferring, by the remote user equipment, a non-3GPP technology originally used by the second interface into another non-3GPP technology for transmission.

5. The method according to claim 1 , wherein the autonomously selecting, by the remote user equipment, a communication path communicating with the access network comprises at least one of:

transferring, by the remote user equipment, all or a part of services transmitted originally via the first interface, into the second interface for transmission;

transferring, by the remote user equipment, all or a part of services transmitted originally via the second interface, into the first interface for transmission;

transferring, by the remote user equipment, all or a part of services transmitted originally via the first interface, into an interface directly connected to a target base station for transmission; and

transferring, by the remote user equipment, all or a part of services transmitted originally via the second interface, into an air interface connected to a target relay user equipment for transmission.

6. The method according to claim 1 , wherein the relay user equipment comprises at least one of:

a layer 2 UE-to-network relay or a layer 3 UE-to-network relay.

7. The method according to claim 1 , wherein

the first interface is a Uu interface; and/or

the second interface is an air interface between a remote user equipment and a relay user equipment.

8. The method according to claim 1 , wherein the autonomously selecting, by the remote user equipment, a communication path communicating with the access network further comprises:

determining, by the remote user equipment, the communication path communicating with the access network based on at least one of:

link quality, quality of service (QoS) demand, power consumption demand, and access network indication information.

9. The method according to claim 8 , wherein the pre-configured rule comprises at least one of:

priority of a communication path; link quality threshold of the communication path; and a resource configuration rule.

10. The method according to claim 8 , wherein the access network indication information is indicative of at least one of:

communicating with the access network by simultaneously using a first interface and a second interface, wherein the first interface is configured to directly connect the remote user equipment to the access network, and the second interface is configured to connect the remote user equipment to the access network via a relay user equipment;

a service type of communication on the first interface and the second interface, wherein the service type comprises one of: QoS of a service, a control plane service, a user plane service, and an uplink or downlink service;

priority of the first interface and priority of the second interface;

detection resource and/or communication resource of the second interface; and

a 3GPP or non-3GPP technology used by the second interface.

11. The method according to claim 1 , wherein the communicating with the access network by the remote user equipment using the communication path comprises at least one of:

uplink control plane (CP) communication;

uplink user plane (UP) communication;

downlink CP communication; and

downlink UP communication.

12. The method according to claim 1 , wherein the second indication is a system message or a specific instruction indicative of a communications technology, and wherein the specific instruction comprises at least one of: layer 1 signaling, layer 2 signaling, and layer 3 signaling.

13. The method according to claim 1 , wherein

the first interface and the second interface are of intra-frequency or inter-frequency; and/or

the second interface uses a licensed frequency spectrum or an unlicensed frequency spectrum.

14. The method according to claim 1 , wherein the remote user equipment is positioned within or beyond a coverage range of the access network, or the remote user equipment is positioned within an enhanced coverage range of the access network; and the relay user equipment is positioned within the coverage range of the access network.

15. A communication apparatus for realizing service continuity, the communication apparatus being for a remote user equipment to reselect a communication link after a communication operation fails or to initially select a communication link, being positioned in the remote user equipment, and comprising:

a processor; and

a memory configured to store instructions executable by the processor; wherein the processor is configured to perform:

autonomously selecting, by the remote user equipment, a communication path communicating with the access network; and

communicating with the access network by the remote user equipment using the communication path,

wherein the communication path comprises at least one of:

communicating with the access network via a first interface, wherein the first interface is configured to directly connect the remote user equipment to the access network; and

communicating with the access network via a second interface, wherein the second interface is configured to connect the remote user equipment to the access network via a relay user equipment;

wherein the autonomously selecting, by the remote user equipment, a communication path communicating with the access network means that the remote user equipment selects the first interface or the second interface based on a pre-configured rule to communicate with the access network;

wherein the pre-configured rule is stored in a universal integrated circuit card (UICC) or a mobility equipment (ME) of the remote user equipment, or is received from the access network via a system broadcast message; and

wherein in a case that the communication path comprises communicating with the access network via the second interface, the processor is further configured to perform:

autonomously selecting or determining based on a second indication of the access network, by the remote user equipment, a communication technology used for communicating between the remote user equipment and the relay user equipment.

16. A non-transitory computer-readable storage medium storing a computer-executable instruction, wherein the computer-executable instruction is configured to execute a communication method for realizing service continuity, the method being for a remote user equipment to reselect a communication link after a communication operation fails or to initially select a communication link, and comprising:

autonomously selecting, by the remote user equipment, a communication path communicating with the access network; and

communicating with the access network by the remote user equipment using the communication path,

wherein the communication path comprises at least one of:

communicating with the access network via a first interface, wherein the first interface is configured to directly connect the remote user equipment to the access network; and

communicating with the access network via a second interface, wherein the second interface is configured to connect the remote user equipment to the access network via a relay user equipment;

wherein the autonomously selecting, by the remote user equipment, a communication path communicating with the access network means that the remote user equipment selects the first interface or the second interface based on a pre-configured rule to communicate with the access network;

wherein the pre-configured rule is stored in a universal integrated circuit card (UICC) or a mobility equipment (ME) of the remote user equipment, or is received from the access network via a system broadcast message;

wherein in a case that the communication path comprises communicating with the access network via the second interface, the method further comprises:

autonomously selecting or determining based on a second indication of the access network, by the remote user equipment, a communication technology used for communicating between the remote user equipment and the relay user equipment.