Patent ID: 9749923
Date: 2017-08-29
CPC Classifications: H04W

Claim:
1. A method for re-selecting a second communication network, comprising: establishing a session between a first communication network and a communication device; receiving by a Policy and Charging Rules Function (PCRF) server, a network access request from the communication device, the network access request indicating a request to modify a parameter of the session established with the first communication network by the communication device; based on the network access request, determining by the PCRF server, a policy decision on the modified parameter of the session; sending by the PCRF server, an Access Reselection Request to an Access Network Discovery and Selection Function (ANDSF) server with information on the modified parameter for the session; determining by the ANDSF server according to the Access Reselection Request from the PCRF, whether communication resources of the first communication network are available for modifying the parameter of the session established with the communication device; in response to determining by the ANDSF server that communication resources are not available, sending by the ANDSF server, a handover command to the communication device; and re-selecting by the communication device, the second communication network according to the received handover command.