Analysis of IPv6 Routing Protocol in Mobile Services

How does IPv6 play a role in mobile businesses? First, let's analyze the current development status and existing problems. In the face of the Internet world under IPv4 control, IPv6 and the Next Generation Internet are the key to success. The advantage of IPv6 routing protocol is that it can better support various end-to-end and multimedia services, for example, video conferencing, VoIP, file sharing, information appliances, timely communication, and the aforementioned mobile data services, some foreign manufacturers have also carried out some forward-looking development in this field, the corresponding prototype products are implemented. However, these application products focus on initial functional development, lack of complete architecture and good scalability, and lack of supporting management systems, therefore, there is still a large distance between it and the actual telecom-level business products ｡

With the gradual deployment of next-generation Internet with IPv6 routing protocol as the core, it is very important for manufacturers and operators to develop new businesses and applications, it is necessary to clarify the actual business needs of users in the next-generation Internet, study and develop the architecture of the next-generation business platform, solve the key technologies required for implementing the next-generation business, and formulate new business specifications, it strives to take a favorable position in the value chain of the Next Generation Internet. For equipment manufacturers, according to the operator's business needs and network business status, they can develop business products that meet the market needs as soon as possible, these services can make full use of the new features of IPv6 Routing Protocol. In addition, although both IPv6 and IPv4 protocols are network layer technologies, IPv6 also needs to solve some key problems in supporting services, such: business quality, business security, user identification and authentication, user status and positioning, etc. These problems need to be studied and resolved in the context of the next generation Internet, instead of copying the traditional IPv4 network solution ｡

The mobile data service is a variety of data services on the mobile communication platform, such: apsaravideo for VOD, mobile positioning, remote monitoring, enterprise network access, multimedia text messages, Internet access, WAP, and e-commerce. mobile data services are the product of the combination of mobile communication and data communication, compared with the fixed network data service, the service features more personalized and diversified, it is an important driving force behind mobile voice that may drive the rapid development of mobile networks. Currently, mobile networks use IPv4 protocols to support data services, however, the implementation of the IPv4 protocol in mobile networks is not very satisfactory in many aspects. Taking the address as an example, because the IPv4 address is very limited, the APNIC (Asia-Pacific Network Information Center) responsible for IP Address Allocation in the Asia-Pacific Region stipulates that when mobile operators assign IPv4 addresses to mobile terminals, use private IPv4 addresses as much as possible. use private IPv4 addresses to support traditional Internet access and WAP services, but for end-to-end services, such as encrypted, multi-party communications, and multimedia communications, there will be many difficulties. The IPv6 Routing Protocol fully considers the mobile requirements during design and uses the Mobile IPv6 protocol as the basic component of the IPv6 routing protocol, therefore, it has become a major candidate protocol for Mobile Data businesses. The 3GPP organization has made IPv6 Routing Protocol an important part of the third-generation mobile communication 3G system, it is also stipulated that IPv6 routing protocol should be used in 3GPP R5 to support IMS (IP Multimedia Subsystem, IP-based Multimedia Subsystem) the mobile data network adopts the IPv6 Routing Protocol to implement end-to-end bidirectional communication between mobile terminals, mobile terminals, and fixed network terminals, so that mobile communication forms and functions are more diverse ｡

Currently, IETF and 3GPP have done a lot of work on how to deploy IPv6 routing protocols in mobile networks. For example, they have developed a scheme to allocate IPv6 addresses to 3G terminals, about 1/3 of the remaining IPv4 address space in the world cannot meet the needs of mobile users, while IPv6 address space is huge, each mobile user can be assigned a public IPv6 address. how to configure IPv6 addresses for mobile terminals in the 3G core network is very important, according to requirements of 3GPP, IETF has formulated relevant suggestions for carrying data services based on IPv6 routing protocol, and formed RFC3314 and RFC3316, some of which are under discussion, in the draft phase, mobile networks can configure IPv6 addresses for terminals in two ways: stateful Address Configuration and Stateless Address Configuration. the stateful Address Configuration requires the DHCP server to configure the IPv6 address for the terminal. In the Stateless Address Configuration Mode, no other entity (except the GGSN) is required to participate in the address configuration process ｡

As mobile terminals can access IP networks through multiple access technologies, such as WLAN, GPRS, and 3G cellular systems, when user terminals switch between these different access methods, to maximize the need to maintain existing communication session connections (such as TCP connections). Both mobile IPv4 and mobile IPv6 allow users to span different access media and ensure normal operation of sessions at or above the network layer, it is also used to implement the mobile function across different mobile networks (between different GGSN domains). Compared with mobile IPv4, mobile IPv6 has improved in many aspects, such: the foreign proxy (FA) in mobile IPv4 is canceled to Facilitate the Implementation of Mobile IP addresses. The IPv6 protocol is used to achieve "route optimization" to overcome the "triangle routing" Problem in mobile IPv4; the Mobile IPv6 protocol has been integrated into the IPv6 protocol, so routing optimization can be implemented between any two terminals (including fixed and mobile terminals) in the world. The IPv6 address space is large, it is easy to assign a forwarding address to a mobile terminal. in Mobile IPv6, a large amount of data sent to a mobile node can be transmitted using the IPv6 Routing header, tunnel in mobile IPv4 has a high overhead. Mobile IPv6 can effectively solve the problem of host movement in wireless and wired networks, it is a feasible supplementary solution to enhance terminal Mobility in 3G networks. Currently, the Mobile IPv6 recommendation is the RFC3755 (Mobility support in IPv6) just passed by IETF in June this year )｡