SYSTEMS AND METHODS FOR EFFICIENT TRAFFIC OFFLOAD WITHOUT SERVICE DISRUPTION

摘要

Methods, systems, and devices for offloading traffic flows without service disruption are disclosed herein. User equipment (UE) is configured to receive an indication that a current packet data network (PDN) connection can be optimized. The current PDN connection is established over a first PDN gateway (PGW). The UE requests connection over a new PDN connection to a same type of service as the current PDN connection without releasing the connection over the first PGW. The UE routes new traffic flows over a second PGW corresponding to the new PDN connection and routes old traffic flows over the first PGW.

主权项

1. Apparatus for user equipment (UE) to facilitate coordinated selected internet protocol (IP) traffic offload (CSIPTO) in an evolved packet core (EPC) network, the apparatus comprising circuitry configured to:
establish, through a radio access network (RAN), a first packet data network (PDN) connection between the UE and a first PDN gateway (PGW) in the EPC network for wireless communication of a first IP flow requiring IP address preservation; and request, while maintaining the first PDN connection for the first IP flow, a second PDN connection between the UE and a second PDN gateway in the EPC network for wireless communication of a second IP flow having a same communication service type as that of the first IP flow so as to cause a mobility management entity (MME) of the EPC network to invoke CSIPTO establishing, while preserving the IP address associated with the first IP flow, the second PDN connection to the second PGW that is geographically separated from the first PGW.