Dynamic path selection
The present disclosure relates to a communication method and system for converging a 5 th -Generation (5G) communication system for supporting higher data rates beyond a 4 th -Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Disclosed is a method of path selection in a system where a first User Equipment, UE, is operable to communicate with a second UE via either a first direct path or a second path via a telecommunication network and wherein the active path is selected to be the first path or second path in response to a trigger derived from: a) either one of the first and second UEs; b) the telecommunication network; or c) an application function in the network miming in coordination with one of the first or second UEs.
1. A method by a policy control function (PCF) entity for a proximity services (ProSe) in a wireless communication system, comprising:
determining a path selection policy for a terminal indicating which path is preferred for a ProSe service in a direct communication, the preferred path for the ProSe service including a PC5 path or an Uu path; and
transmitting, to the terminal via an access and mobility management function (AMF) entity, the path selection policy,
wherein a path for the ProSe service is selected by the terminal based on the path selection policy before a connection with another terminal or a network is established.
2. The method of claim 1 ,
wherein the PC5 path is selected by the terminal, in case that the path selection policy indicates the PC5 path for the ProSe service, and
wherein the Uu path is selected by the terminal, in case that the path selection policy indicates the Uu path for the ProSe service.
3. The method of claim 1 , further comprising:
receiving, from a unified data repository (UDR) a notification of a data change,
wherein the determination of the path selection policy is initiated based on the notification.
4. The method of claim 3 ,
wherein the notification is generated based on information on a path preference for the ProSe service transmitted from an application function (AF) entity to the UDR, and
wherein the path preference is determined based on quality of service (QOS) sustainability analytics provided from a network data analytics function (NWDAF) entity.
5. The method of claim 4 ,
wherein a notification of a data change is transmitted from a unified data repository (UDR) to the PCF entity, and
wherein the path selection policy is determined by the PCF entity based on the notification.
6. The method of claim 5 ,
wherein the notification is generated based on information on a path preference for the ProSe service transmitted from an application function (AF) entity to the UDR, and
wherein the path preference is determined based on quality of service (QOS) sustainability analytics provided from a network data analytics function (NWDAF) entity.
7. A method performed by a terminal for a proximity services (ProSe) in a wireless communication system, the method comprising:
receiving, from a policy control function (PCF) entity via an access and mobility management function (AMF) entity, a path selection policy for the terminal indicating which path is preferred for a ProSe service in a direct communication, the preferred path for the ProSe service including a PC5 path or an Uu path-;
selecting a path for the ProSe service based on the path selection policy; and
establishing a connection with another terminal or a network based on the selected path.
8. The method of claim 7 , wherein the selecting of the path for the ProSe service comprises:
selecting the PC5 path, in case that the path selection policy indicates the PC5 path for the ProSe service; and
selecting the Uu path, in case that the path selection policy indicates the Uu path for the ProSe service.
9. A policy control function (PCF) entity for a proximity services (ProSe) in a wireless communication system, the PCF entity comprising:
a transceiver; and
a controller configured to:
determine a path selection policy for a terminal indicating which path is preferred for a ProSe service in a direct communication, the preferred path for the ProSe service including a PC5 path or an Uu path, and
control the transceiver to transmit, to the terminal via an access and mobility management function (AMF) entity, the path selection policy,
wherein a path for the ProSe service is selected by the terminal based on the path selection policy before a connection with another terminal or a network is established.
10. The PCF entity of claim 9 ,
wherein the PC5 path is selected by the terminal, in case that the path selection policy indicates the PC5 path for the ProSe service, and
wherein the Uu path is selected by the terminal, in case that the path selection policy indicates the Uu path for the ProSe service.
11. The PCF entity of claim 9 , wherein the controller is further configured to:
control the transceiver to receive, from a unified data repository (UDR) a notification of a data change, and
determine the path selection policy based on the notification.
12. The PCF entity of claim 11 ,
wherein the notification is generated based on information on a path preference for the ProSe service transmitted from an application function (AF) entity to the UDR, and
wherein the path preference is determined based on quality of service (QOS) sustainability analytics provided from a network data analytics function (NWDAF) entity.
13. A terminal for a proximity services (ProSe) in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
control the transceiver to receive, from a policy control function (PCF) entity via an access and mobility management function (AMF) entity, a path selection policy for the terminal indicating which path is preferred for a ProSe service in a direct communication, the preferred path for the ProSe service including a PC5 path or an Uu path,
select a path for the ProSe service based on the path selection policy, and
establish a connection with another terminal or a network based on the selected path.
14. The terminal of claim 13 ,
wherein a notification of a data change is transmitted from a unified data repository (UDR) to the PCF entity, and
wherein the path selection policy is determined by the PCF entity based on the notification.
15. The terminal of claim 14 ,
wherein the notification is generated based on information on a path preference for the ProSe service transmitted from an application function (AF) entity to the UDR, and
wherein the path preference is determined based on quality of service (QOS) sustainability analytics provided from a network data analytics function (NWDAF) entity.
16. The terminal of claim 13 , wherein the controller is further configured to:
select the PC5 path, in case that the path selection policy indicates the PC5 path for the ProSe service, and
select the Uu path, in case that the path selection policy indicates the Uu path for the ProSe service.