Application Prospects of Mobile IPv6

IPv6, as the foundation of the Next Generation Network Protocol to replace IPv4, has a wide range of applications. It will bring unlimited development space for mobile communication, as shown in the following aspects.

1. IPv6 has a huge address space. IPv6 provides enough addresses for billions of users around the world, especially in the mobile market. After IPv6 is adopted, enough IP addresses are available) this will make the deployment of mobile IPv6 easier and more direct, because it is no longer necessary to manage the Network Address Translation and address ing between the internal address and the public address, to deploy a network, you only need to manage network elements and protocols less than IPv4.

2. Provides end-to-end peer communication. Today, Internet NAT is widely used, and most applications are based on clients/servers. This situation cannot meet people's requirements for future mobile networks, because the vast majority of communications between mobile phones and other network devices require peer-to-peer communication, global addresses rather than internal addresses are required, removing NAT will truly enable global communication, connections from any point to any point, network-initiated IP services, etc, this will be the most beneficial for interworking between cellular networks and the Internet in the future, and will be crucial for the continuous and successful development of these networks.

3. embedded security mechanisms. The complete composition of IPv6 standards is the definition of security mechanisms, and security issues in IPv4 standards are complementary optional. IPv6 regards security as an integral part of the standard. The Global addressing mode of IPv6 requires that the security deployment should be at a more coordinated and unified level, instead of implementing security through a stack solution like IPv4. Through IPsec in IPv6, You can encrypt/authorize communications on the IP layer (that is, all applications running on the IP layer. Through mobile IPv6, you can achieve seamless access to the remote enterprise intranet (such as the enterprise VPN Network) and achieve permanent connection.

4. convenient automatic configuration. The methods for configuring host addresses in IPv6 include stateless automatic configuration, full-state automatic configuration (DHCPv6), and static addresses. This means that addressing in IPv6 can achieve more efficient self-management, this makes it easier to move, add, and change, and significantly reduces the cost of network management. Stateless automatic configuration is an important method for mobile nodes to obtain addresses. nodes use the Neighbor Discovery Mechanism to automatically obtain unique globally routable addresses, this plug-and-play address configuration method does not require manual intervention by the user or operator, which is in line with the Internet access requirements of mobile devices. If it is configured in full state, a server is required for DHCP, at the same time, the operation and maintenance work has also been added.

5. QoS Assurance. The IPv6 Header adds a stream marking domain. A 20-bit long stream marking domain allows any network's intermediate point to determine and treat data streams of a specific IP address differently, although the actual usage of stream tag is not standardized yet, it is certain that it can be used to support new billing systems based on service levels and other standards in the future. IPv6 also improves service quality through several other methods, such as providing permanent connections, preventing service interruptions, and improving network performance.

6. IPv6 uses static hometown addresses to identify each node. When a mobile node leaves the home subnet, it sends information about its current location to its home agent on the home link, the home site proxy intercepts the data packets sent to the mobile node address and sends the data to the current location of the mobile node through a tunnel. This mechanism is completely transparent to all network layers (such as TCP, UDP, and all applications) above the IP address. Therefore, the DNS record of a mobile node directs to the home address of the node, when a mobile node changes its Internet access point, it does not need to change its DNS records. In fact, mobile IPv6 only affects packet routing and is independent of the routing protocol itself (such as RIP and OSPF ).

7. Mobile IPv6 also creates a care-of-address ). When a node changes its network access point, the forwarding address of the node can be generated in two ways, one is obtained by receiving a notification from the router (the Stateless Address is automatically configured ), one is allocated by the DHCP server (the full-state address is automatically configured ). The mobile node must be able to ensure that the end-to-end connection is not interrupted when one vro moves to another vro. Therefore, each mobile node needs a home address to maintain the connection, A large number of forwarding addresses are required to maintain the routing of mobile nodes. Therefore, billions of forwarding addresses will be required in the future.

According to the relationship between 3G and IPv6, 3GPP and PP2 of the 3G International Standards Organization hold that: GSM and CDMA Cellular Phones will require high-speed value-added applications, seamless wireless mobility, portability, location information, and other services in the future. Therefore, 3GPP's Internet Multimedia Subsystem (IMS) and UMTS's TerrestrialRemoteAccessNetwork (UTRAN) IPv6 is supported.