Research on switching management based on WiMAX network (1)

The WiMAX network based on the IEEE 802.16 protocol family will develop according to the trend of fixed, nomadic, and mobile. The 802.16e protocol is designed for comprehensive mobility. 802.16e makes significant improvements to the interface physical media control layer (PHY), and adds new features such as the switching process to the media access control layer (MAC. The structure of the WiMAX network system is given in this paper. The two main switching modes in the WiMAX network system structure are described in detail, and the switching mechanism is introduced, the switching flowchart and main switching steps are provided.

1. Introduction

With the formal adoption of the IEEE 802.16e standard [1], Wireless MAN has entered a new stage, that is, full support for mobility. To support up to 120 Mbit/s of movement speed below 6 GHz, 802.16e has made significant improvements to the physical layer PHY and added new features such as the switching process in the media access control layer MAC. From the progress of the protocol, we can see that the development trend of WiMAX networks is fixed → nomadic → Mobile [2], and will eventually become a network that fully supports mobility. WiMAX networks support roaming and mobile services. Its mobility management has a great impact on the network structure, mobility Management is mainly used to effectively support terminal roaming and mobility throughout the service network, involving location management and switch management. Switch Management ensures the service quality of activation services when the terminal is moved. It will have an important impact on the WiMAX network structure and Networking Mode [3].

2. WiMAX network system structure

As a reference architecture for WiMAX networks, the entire network is divided into two parts: the access network WiMAX_AN) and the core network WiMAX_CSN), as shown in WiMAX network system structure 1.

Figure 1 WiMAX network system structure

The WiMAX network system structure mainly includes WiMAX access network WiMAX_AN) and WiMAX core network WiMAX_CSN ). WiMAX_AN provides wireless access for WiMAX users, including base stations, base station controllers, access gateways, and other functional entities. WiMAX_CSN provides IP connection services for WiMAX users, including many functional entities, such as routers, AAA proxies/servers, user databases, and interconnected gateways.