Methods for handling ps and cs communication service

Abstract

Methods for handling PS and CS voice services between a mobile communication device and a service network are provided. The method comprises providing, by the service network, a first type of communication service to the mobile communication device and concurrently receiving, by the service network, a service request message to request for establishment of a second type of communication service, determining, by the service network, whether any type of communication service is an emergency service, and declining, by the service network, the type of communication service that is not the emergency service, wherein the service network only supports one type of communication service to the mobile communication device at one time.

1 . A method, providing a circuit switched (CS) voice service and a packet switched (PS) voice service to a mobile communication device by a service network, comprising:
 transmitting, by the service network, a supportability message indicating concurrent supportability of the CS voice service and the PS voice service from the service network.   
     
     
         2 . The method of  claim 1 , wherein the transmitting step comprises
 broadcasting or sending through dedicated message, by the service network, the supportability message indicating the concurrent supportability of the CS voice service and the PS voice service.   
     
     
         3 . A handover method, handing over a circuit-switched (CS) voice service and a packet switched voice (PS) voice service of a mobile communication device by a service network from a source cellular station to a target cellular station, comprising:
 determining, by the service network, to perform a handover procedure of the CS voice service and the PS voice service from the source cellular station to the target cellular station based on a handover measurement of a radio connection between the source cellular station and the mobile communication device; and   terminating, by the service network, at least one of the CS voice service and the PS voice service when the handover procedure is determined to be performed and the target cellular station only supports one CS voice service.   
     
     
         4 . The handover method of  claim 3 , further comprising determining, by the service network, the CS voice service and the PS voice service are emergency service; and
 the terminating step comprises terminating only one of the CS voice service and the PS voice service when one service is emergency services and other is non-emergency services, and terminating the non-emergency service when only one service thereof is the emergency service.   
     
     
         5 . A method, handing over a circuit-switched (CS) voice service and a packet switched (PS) voice service of a mobile communication device in a service network from a source cellular station to a target cellular station, comprising:
 receiving, by the mobile communication device, a release message from the source cellular station upon determination that a handover procedure of the CS voice service and the PS voice service from the source cellular station to the target cellular station based on a handover measurement of a radio connection between the source cellular station and the mobile communication device is to be performed; and   in response to the release message, releasing, by the mobile communication device, an established resource for the CS voice service and the PS voice service.   
     
     
         6 . A method, establishing a communication service between a mobile communication device and a service network, comprising
 providing, by the service network, a first type of communication service to the mobile communication device and concurrently receiving, by the service network, a service request message to request for establishment of a second type of communication service;   determining, by the service network, whether any type of communication service is an emergency service;   declining, by the service network, the type of communication service that is not the emergency service; and   wherein the service network only supports one type of communication service to the mobile communication device at one time.   
     
     
         7 . The method of  claim 6 , wherein the declination step comprises:
 rejecting, by the service network, the second type of communication service when the second type of communication service is not the emergency service.   
     
     
         8 . The method of  claim 6 , wherein the declining step comprises:
 releasing, by the service network, the first type of communication service when the first type of communication service is not an emergency service; and   establishing, by the service network, the second type of communication service when the second type of communication service is the emergency service.   
     
     
         9 . The method of  claim 6 , wherein the first and second types of communication service comprise a circuit-switched (CS) based voice service and a packet-switched (PS) based voice service. 
     
     
         10 . A method, establishing a communication service between a mobile communication device and a service network, comprising
 receiving, by the mobile communication device, a first type of communication service and concurrently receiving, by the mobile communication device, a request for establishment of a second type of communication service;   determining, by the mobile communication device, whether any type of communication service is an emergency service;   declining, by the mobile communication device, the type of communication service that is not the emergency service; and   wherein the mobile communication device only supports one type of communication service at one time.   
     
     
         11 . The method of  claim 10 , wherein the declination step comprises:
 rejecting, by the mobile communication device, the second type of communication service when the second type of communication service is not the emergency service.   
     
     
         12 . The method of  claim 10 , wherein the declining step comprises:
 releasing, by the mobile communication device, the first type of communication service when the first type of communication service is not an emergency service; and   establishing, by the mobile communication device, the second type of communication service when the second type of communication service is the emergency service.   
     
     
         13 . The method of  claim 12 , wherein the releasing step comprises releasing established resources for the first type of communication service. 
     
     
         14 . The method of  claim 10 , wherein the first and second types of communication service comprise a circuit-switched (CS) based voice service and a packet-switched (PS) based voice service. 
     
     
         15 . A method, establishing a communication service between a mobile communication device and a service network, comprising
 receiving, by the mobile communication device, a first type of communication service and concurrently receiving, by the mobile communication device, a request for establishment of a second type of communication service;   suspending, by the mobile communication device, the first type of communication service that is not an emergency service;   receiving, by the mobile device, the second type of communication service; and   wherein the mobile communication device only supports one type of communication service at one time.