The March 2005 issue of Business Communications Review, pp. 20–21 has an interesting article entitled Which NGN? that debates different visions of the future of the Internet:
- But this all could change. Major moves are afoot to radically alter the way the Internet operates. If certain organizations and people have their way, the Internet will evolve to look considerably more like the public switched telephone network (PSTN) or today’s mobile/cellular networks. And this could happen much sooner than you might think.
- To facilitate this migration, many carriers started participating in a major international standards development effort. Working through an International Telecommunication Union (ITU) Study Group, the carriers (with vendor and government assistance) are developing their own blueprint that they call the “Next Generation Network” (NGN). Intense standards work is under way at the ITU and other groups such as the Alliance for Telecommunications Industry Solutions (ATIS) to further the integration and interoperability of IP networks with the PSTN and mobile networks.
Architecturally, the ITU’s NGN relies heavily on the IP Multimedia Subsystem (IMS) framework, developed by the 3rd Generation Partnership Project (3GPP)/3GPP2 for 3G/UMTS and CDMA mobile networks. The IMS has been extended to cover wireline facilities, to create a converged, seamless mobile user experience. The ITU NGN also mandates IPv6, and uses traffic prioritization end-to-end to deliver service quality. It requires reservation and commitment of network resources before connections are established.
Although the article suggest a conflict of vision on NGN standards, this post also notes that the ITU and IETF are exploring ways of cooperating on NGN standardization. Both ITU's FGNGN (Focus Group on Next Generation Networks) and Study Group 13 (Next Generation Networks) are meeting in the coming weeks at ITU to advance NGN standardization.