公开(公告)号：US09654964B1

公开(公告)日：2017-05-16

申请号：US15075843

申请日：2016-03-21

申请人： Verizon Patent and Licensing Inc.

发明人： Miguel Angel Carames ,  Jignesh Patel

IPC分类号： H04W4/00 ,  H04W8/06 ,  H04L29/06 ,  H04W12/06 ,  H04W4/22

CPC分类号： H04W4/90 ,  H04L65/1006 ,  H04L65/1016 ,  H04L65/1046 ,  H04L65/1069 ,  H04L65/1073 ,  H04W8/12 ,  H04W12/06

摘要： A method including receiving, at a CSCF (Call Session Control Function) portion of a home network in which a mobile station is subscribed, an IMS (IP Multimedia Subsystem) registration request from the mobile station via a visited network to which the mobile station is attached; establishing an SIP (Session Initiation Protocol) session between the mobile station and the CSCF server in response to the received IMS registration request; receiving, at the CSCF server, a SIP INVITE message from the mobile station during the SIP session, wherein the SIP INVITE requests use of a service; obtaining an identifier for the visited network; obtaining, in response to receiving the SIP INVITE message, a first roaming policy based on the identifier for the visited network; determining whether the SIP INVITE message is acceptable based on the obtained first roaming policy and the service requested by the SIP INVITE message; and sending a response for the SIP INVITE message to the mobile station, wherein the response is based on the determination whether the SIP INVITE message is acceptable.