Method and system for processing handover in heterogeneous mobility protocol mixed networks and mip client device

Abstract

Provided are a method for processing handover to provide IP mobility for mobile user equipment, a system thereof, and a Mobile IP (MIP) client device. The method processing handover at a home agent in a heterogeneous protocol mixed network includes: at a home agent, creating a Proxy Mobile IP (PMIP) tunnel when user equipment accesses a PMIP network; at the home agent, creating a Client Mobile IP (CMIP) tunnel when a CMIP network is accessed due to handover of the user equipment; and at the home agent, severing the PMIP tunnel when the user equipment completes performing handover.

1 . A method for processing handover at a home agent in a heterogeneous protocol mixed network, comprising:
 creating a Proxy Mobile Internet Protocol (PMIP) tunnel to an access gateway of a PMIP network when user equipment accesses a PMIP network;   creating a Client Mobile Internet Protocol (CMIP) tunnel to the user equipment when the user equipment decides to handover to the CMIP network; and   severing the PMIP tunnel when the user equipment completes performing the handover.   
     
     
         2 . The method of  claim 1 , wherein said creating the CMIP tunnel includes:
 allowing simultaneous binding to the PMIP network and the CMIP network by receiving a Registration ReQuest (RRQ) message from the user equipment when the user equipment accesses the CMIP network; and   transferring a Registration RePly (RRP) message to the user equipment.   
     
     
         3 . The method of  claim 1 , wherein said creating the PMIP tunnel includes:
 receiving a Proxy Registration ReQuest (PRRQ) message from the access gateway of the PMIP network when the user equipment accesses the PMIP network; and   allocating a home IP address for the user equipment and transferring a Proxy Registration RePly (PRRP) message including the home IP address to the access gateway of the PMIP network.   
     
     
         4 . The method of  claim 1 , wherein said severing the PMIP tunnel includes:
 receiving a PRRQ message with a light time setup as “0” from the access gateway of the PMIP network when the user equipment completes performing handover; and   severing the PMIP tunnel.   
     
     
         5 . A method for processing handover at a home agent in a heterogeneous protocol mixed network, comprising:
 creating a Client Mobile Internet Protocol (CMIP) tunnel between user equipment and the home agent when the user equipment accesses a CMIP network;   creating a Proxy Mobile Internet Protocol (PMIP) tunnel between the home agent and an access gateway of a PMIP network when the user equipment decides to perform handover to the PMIP network; and   severing the CMIP tunnel when the user equipment completes performing handover.   
     
     
         6 . The method of  claim 5 , wherein said creating the PMIP tunnel includes:
 receiving a Proxy Registration ReQuest (PRRQ) message from the access gateway of the PMIP network when the user equipment accesses the PMIP network;   allowing simultaneous binding (simultaneous registration) to the CMIP network and the PMIP network; and   transferring a Proxy Registration ReQuest (PRRQ) message to the access gateway of the PMIP network.   
     
     
         7 . The method of  claim 5 , wherein said creating the CMIP tunnel includes:
 receiving a Registration ReQuest (RRQ) message from the user equipment when the user equipment accesses the CMIP network; and   allocating a home IP address for the user equipment and transferring a Registration RePly (RRP) message including the home IP address to the user equipment.   
     
     
         8 . The method of  claim 5 , wherein said severing the CMIP tunnel includes:
 receiving a RRQ message having a life time setup as “0” from the user equipment when the user equipment completes performing handover; and   severing the CMIP tunnel.   
     
     
         9 . A method for processing handover at user equipment in a heterogeneous mobility protocol mixed network, comprising:
 being allocated with a home Internet Protocol (IP) address for the user equipment by accessing a Proxy Mobile IP (PMIP) network; and   forming a Client Mobile IP (CMIP) tunnel to a home agent by accessing the CMIP network when the user equipment decides to perform handover to the CMIP network;   wherein the home agent severs a PMIP tunnel to an access gateway of the PMIP network when the home agent completes performing handover to the user equipment.   
     
     
         10 . The method of  claim 9 , wherein said forming a CMIP tunnel includes:
 transmitting a Registration ReQuest (RRQ) message to the home agent; and   receiving a Registration RePly (RRP) message from the home agent.   wherein the home agent allows simultaneous binding to the CMIP network and the PMIP network according to the RRQ message.   
     
     
         11 . The method of  claim 9 , wherein in said being allocated with a home IP address, the home IP address allocated by the home agent is transferred to an access gateway of the PMIP network. 
     
     
         12 . A method for processing handover at user equipment in a heterogeneous mobility protocol mixed network, comprising:
 forming a Client Mobile Internet Protocol (CMIP) tunnel to a home agent by accessing a CMIP network; and   accessing a Proxy Mobile Internet Protocol (PMIP) network when the user equipment decides to perform handover to a Proxy,   wherein the home agent severs the CMIP tunnel to the user equipment when the user equipment completes performing the handover.   
     
     
         13 . The method of  claim 12 , wherein said forming a CMIP tunnel includes:
 transmitting a Registration ReQuest (RRQ) message to the home agent; and   receiving a Registration RePly (RRP) message from the home agent.   wherein the home agent allocates a home IP address for the user equipment according to the RRQ message.   
     
     
         14 - 18 . (canceled)