Communication system
US7577141B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2006 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Feb 6, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L61/251
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An IPv4-IPv6 multicast address translation table is dynamically created, so that it is unnecessary to register multicast servers in advance. When an IPv4 MC group address exists as a response of a DNS server to a DNS request of an IPv6 MC client or when an IPv6 MC group address exists as a response of the DNS server to a DNS request of the IPv4 MC client H1 to H4, DNS Proxy D3 requests an MC adaptive translator T1 to generate a virtual IPv6 MC group address or a virtual IPv4 MC group address, and the MC adaptive translator T1 generates a virtual IPv6 MC group address or a virtual IPv4 MC group address from an address pool, and also creates an MC address translation table, whereby the MC address translation of IPv4-IPv6 can be dynamically performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.