Patent ID: 8300631

Claim:
A network system for realizing mobile IP management, comprising: a control function entity and a forwarding function entity of a transmission layer, the forwarding function entity performing service forwarding under the control of the control function entity; the control function entity of the transmission layer comprises a mobility control entity and the forwarding function entity comprises a mobility forwarding entity; wherein the mobility control entity is configured to process signal sent from a mobile node and transmit a processing result to the mobility forwarding entity; and the mobility forwarding entity is configured to encapsulate/decapsulate and forward mobile service related packets under the control of the mobility control entity; wherein a registration signal is directly transmitted to a home mobility control entity when the mobile node is in a foreign network, or the sent registration signal is transmitted to the home mobility control entity via a foreign mobility control entity of a foreign network where the mobile node resides when the mobile node is in the foreign network; when the mobile node is in the foreign network, a route optimization request is transmitted to the home mobility control entity by the mobile node after the mobile node completes the switching and the route optimization request is transmitted to a mobility control entity in which the correspondent node resides after the route optimization request is approved; and an optimized communication channel is established after the mobile node receives a route optimization response, and packets are forwarded by a mobility forwarding entity in which the correspondent node resides, and the mobile node acquires a care-of address from the foreign network prior to sending a mobility registration signal when the mobile node switches registration, and carries the care-of address in the mobility registration signal; the mobility control entity is further configured to acquire information on quality of service of the mobile node and applies the information to service control during the switching.