Status Quo of Mobile IPv6 Routing Protocol

In the network protocol, we have started to use the IPv6 protocol. Especially for mobile communication, IPv6 is also studied. Now we will describe the IPv6 Routing Protocol in mobile communication, hoping to help you understand this knowledge, in this way, we can have a deep understanding of our networks and communication protocols.

I. IPv6 business application development status and Existing Problems

For IPv6 and next-generation Internet, business is the key to success. The advantage of IPv6 routing protocol is that it can better support various end-to-end and multimedia services, such as video conferencing, VoIP, file sharing, information appliance, timely communication, and mobile data services mentioned above. At present, some foreign manufacturers have also carried out some forward-looking development in this field to implement the corresponding prototype products. However, these application products focus on the initial development of functions, there is a lack of complete architecture and good scalability, and there is no supporting management system. 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. For carriers, it is necessary to clarify the actual business needs of users on the next-generation Internet, study and develop the architecture of the next-generation business platform, and solve the key technologies required for implementing the next-generation business, and formulate new business specifications, and strive to take a favorable position in the value chain of the Next Generation Internet. Device manufacturers can develop business products that meet market requirements as soon as possible based on the operator's business needs and network business conditions, so that these services can fully utilize the new features of IPv6 routing protocols. In addition, although IPv6 and IPv4 protocols are both network layer technologies, IPv6 also needs to solve some key problems in terms of service support, 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.

Ii. IPv6 Mobile Data capabilities

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. The mobile data business is the product of the combination of mobile communication and data communication. Compared with the fixed network data business, it can better reflect the personalized and diversified characteristics of the business, it is an important driving force behind the rapid development of mobile networks. Currently, mobile networks use IPv4 to support data services, but IPv4 is not ideal in many aspects. Taking the address as an example, due to the limited IPv4 address, the APNIC (Asia-Pacific Network Information Center, Asia Pacific Network Information Center) is responsible for IP Address Allocation in the Asia Pacific region, when assigning an IPv4 address to a mobile terminal, a mobile operator tries its best to use a private IPv4 address. Private IPv4 addresses can be used to support traditional Internet access and WAP services, but there are many difficulties for end-to-end services, such as encrypted, multi-party communication, and multimedia communication. IPv6 Routing Protocols fully consider mobile requirements during design and use mobile IPv6 as a basic part of IPv6 routing protocols. Therefore, IPv6 has become a major candidate protocol for Mobile Data businesses. The 3GPP organization has taken the IPv6 Routing Protocol as an important part of the third-generation mobile communication 3G system, and stipulates that IPv6 routing protocol should be used in the 3GPP R5 version 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, thus increasing the diversity of mobile communication forms and functions.

Currently, IETF and 3GPP have done a lot of work on how to deploy IPv6 routing protocols in mobile networks, such as developing a scheme to allocate IPv6 addresses to 3G terminals. Due to the huge number of global mobile 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 the 3GPP, IETF has formulated relevant suggestions for carrying data services based on the IPv6 routing protocol, and formed RFC3314 and RFC3316, some of which are under discussion and are in the draft stage. 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, you need to maintain the existing communication session connections (such as TCP connections) to the maximum extent ). 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. They are also used to span different mobile networks (between different GGSN domains) the implementation of the mobile function. Compared with mobile IPv4, mobile IPv6 has improved in many aspects, such as canceling the foreign proxy (FA) in mobile IPv4 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. Mobile IPv6 has been integrated into IPv6, therefore, routing optimization can be implemented between any two terminals (including fixed and mobile terminals) in the world. The IPv6 address space is large to facilitate the allocation of forwarding addresses for mobile terminals. in Mobile IPv6, A large amount of data sent to a mobile node can be transmitted using the IPv6 Routing header, while the tunnel mode in mobile IPv4 has a high overhead. Mobile IPv6 can effectively solve the mobile problem of hosts 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) that was just passed by IETF in June this year ).