Mobility management system by distributed mobile IP
US7321577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2003 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Aug 4, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/005
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In the Mobile IPv4 network in the present invention, FA control servers (7a, 7b) that process only Mobile IP signaling, and IP tunnel routers (8a, 8c), being an IP tunnel endpoint, which also function as a default router with respect to a mobile node MN, form an FA function (referred to as a virtual FA). Further, an HA control server (9) that processes only Mobile IP signaling, and an IP tunnel router (8b), being an IP tunnel endpoint, form an HA function (referred to as a virtual HA). Here, the relation between the FA control servers (7a, 7b) and the IP tunnel routers (8a, 8c), and the relation between the HA control server (9) and the IP tunnel router (8b) are such that the former is a Media Gateway Controller (MGC) and the latter is a Media Gateway (MG). The FA control server (7a) notifies a mobile node MN (2) of the own address as an FA care-of address, in the form of a regular broadcast or query response. The IP tunnel router (8a) constituting the virtual FA notifies the mobile node MN (2) of an address, being a default router, in the form of a regular broadcast or query response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.