Abstract
The next generation network (NGN) should be a new type established on the basis of the next generation of telecommunication network that is highly performable, expandable, operational, administrable and securer, in order to realize the features and functions such as high-quality streaming media, wireless and mobile capacity, diversification of terminal equipments, quality control of on-demand transmission, higher safety and security. IPv6 is commonly agreed to be one of the key technological supports to NGN. IPv6 network has the greatest chance to become the primary type of NGN after it fulfills all the necessary characteristics of NGN. At present it is just thought to be the next generation of IP network. IPv6 and NGN are proposed and developed for the response to the difficulties faced by the current network. Since the early 1990s, IPv6 and NGN have already made considerable progresses. Although there are many issues relating to the development of IPv6 and NGN need to be deeply explored and disputes exist sometimes, the inherent technical advantages and the growing size of the Matthew Effect is now further accelerating the developments. Up to now, the technology system of IPv6 and NGN is basically mature. Therefore, the actualization of more realistic and characteristic applications has gradually become a significant task nowadays (Market Intelligence Center of CCIDnet, 2007). It is just in this environment that CNGI (China Next Generation Internet) sponsored the initial experiment of IPv6 network construction and application in the field of Earthquake Preparedness and Disaster Mitigation (EPDM), which is known as seismic sensors network experiment based on IPv6. The network of EPDM has gone through a booming growth in recent years. The quality of network applications is growing to be the most critical issue when the network has been colossal. And the congenital deficiency of the current IPv4 network has been turning into a major obstruction in the future development. However, the adoption of IPv6 and NGN can be connected to further various projects, business and information islands, to comply with a unified standard specification, to integrate the resources, to expand the share, to improve the efficiency and effectiveness of information network technology, to broaden the scope of application and to further open up new business, which all lead to forming a more powerful network, establishing a scientific and technological supporting platform and providing service capabilities for the purposes of EPDM.
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