Method and system for soft handoff of mobile terminals in IP wireless networks.
US6611510B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2001 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Aug 18, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W80/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multicast address method for facilitating communication between nodes in “all IP” architectures that support CDMA soft handoff via IP multicasting wherein a multicast DHCP server allocates IP multicast addresses to mobile terminals from administratively scoped IP multicast addresses. IP multicast addresses are allocated to mobile terminals by offering, assigning, and distributing IP multicast addresses to the mobile terminals in response to IP multicast address requests from the mobile terminals to the multicast DHCP servers, which use unique mobile terminal identifiers to correlate mobile terminals with their prior and current IP multicast addresses. A multicast agent generates unicast IP address tables that map each of the unicast IP addresses, and edge routers use the unicast IP address tables to replace unicast IP addresses with their corresponding IP multicast address.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.