IP multicast distribution system, streaming data distribution system and program therefor
US7561570B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2004 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | May 21, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L61/2591
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is an IP multicast distribution system that can convert IP multicast data into packets for individual unicast addresses and can transmit the data to a recipient host in a private address space. According to the present invention, before accepting streaming distribution from the distribution server, a recipient host transmits, to an NAPT gateway, a distribution request for which the IP address of an MU conversion gateway is designated as a destination address, a source port number is designated a port number, determined in advance by the distribution server, in order to enable the reception of data by a reception application provided for the recipient host, and a destination port number is designated as an acceptance port number for the MU conversion gateway. Upon receiving the distribution request, the NAPT gateway designates a source IP address as the global IP address for the NAPT gateway and the source port number as the predetermined port number, and transfers data to the MU conversion gateway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.