Communication system, communication controlling method, communication node, communication mediator node, communication mediating program, session moving method, and session moving program
US7388850B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2003 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Dec 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W80/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An object is to ensure reachability of data even with movement of a session between communication nodes. A home node HN-1 generates a home session address HSA-1 and establishes a session with communication correspondent 90. On the occasion of movement of the session, the home node HN-1 notifies a foreign node FN-1 that it desires to move the session to the foreign node FN-1. The foreign node FN-1 internally generates an IP address HSA-1, copies a state of the session in the home node HN-1, and thereafter notifies a communication mediator node 1 of correspondence update information “HSA-1→HNA-2” in order to let the communication mediator node 1 pass data addressed to HSA-1 to a home node identification address HNA-2 by tunneling. The communication mediator node 1 passes the data to HNA-2 by tunneling on the basis of the correspondence update information and another communication mediator node 2 again passes the data to a care-of address CoA-2 by tunneling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.