【正文】 transmission environment from the point of view, the only remaining technology requires lineofsight transmission environment。s network of optical fiber in this way, in the event of natural disasters will be the normal operation of the fiber optic cable poses a serious threat, it is likely the large area of ??interruption of the fiber optic cable, fiber optic cable repair but also in conditions are met, the time required, which will bring about the safe operation of the grid a serious impact onWireless munications networking technologyWireless munications are generally posed by the wireless base stations, wireless terminal and management server, wireless munications technology based on the technology are: WLAN, WiMax, of WMN, 3G technology. technology is the use of wireless munication technology within a certain scope of local network, is the product of the bination of puter networks and wireless munication technology, wireless multiple access channel as a transmission medium to provide the functionality of the traditional wired LAN, enabling users to achieve real anytime, anywhere, free broadband network access. WLAN technology is also known as wiFi technology, there are currently three IEEE standards. WiFi coverage up to 90m or so, the transmission speed, bandwidth can reach 11 Mbit / s , and up to 54Mbit / s. This technology can form a wireless local area network, especially in the office of the same layer of the building can use a wireless office, and its transmission rate can effectively meet the needs of broadband networking. networking solutions, namely the AC (access control point) + AP (access point) + Wireless LAN + of network management. Although the WiFi technology has been in the application of a very wide range, but it is still on the security there is a certain security risk, the WiFi is a radio frequency (RF) technology to send and receive data. Since wireless networks use radio waves to transmit data signals, so are very vulnerable to attack from outside. technology technology profileThe standards used by WiMax and standards, wireless signal transmission distances of up to 50 km. WiMax is an emerging wireless munications technology, can provide highspeed Internet connection to access the network, applies to stationary and half stationary state, its transfer rate up to 10M70M or so, can fully meet the demand for broadband Internet access. The standard defines the air, the physical layer and MAC layer, access the IP core network can also provide VIP services to support a pointtomultipoint structure.WiMax is to provide last mile wireless broadband access technology that can replace the existing cable and DSL connections to. WiMax will provide fixed, mobile and portable form of wireless broadband connection, and finally be able to provide wireless broadband connectivity does not require direct lineofsight base stations. networking programThe network structure of the WiMax system including WiMax terminal, Part 3, WiMax, wireless access networks and WiMax core network shown in Figure 1. According to the standards adopted by different scenarios, the WiMax terminal, including three types of fixed (), portable and mobile (). WiMax access network mainly refers to the base station, need the support of radio resource management functions, and sometimes for the convenience and other network interconnection interoperability, but also need to include certification and business authorization server (ASA). The core network is mainly used to resolve user authentication, roaming and other functions as the interface with other networks. advantages and disadvantagesSecurity, WiMax provides encryption mechanism, which in the medium access (MAC) layer defines an encrypted sublayer support 128, 192 and 256bit encryption system, by using a digital certificate authentication method to ensure that the wireless The transmission of information within the network security.Maturity, WiMax is a stateoftheart technology, introduced relatively late, there are small frequency reuse, the use of the problem of low, but only recently standardized, largescale promotion of the technology also need to practice the test.From the application prospects of the technology can meet online in a wide range of requirements, coverage can include outdoor and indoor, can be a large area of ??coverage, or even a small number of base stations can be achieved throughout the city coverage. WiMax due to its advanced technology and ultralong transmission distance, has been the industry is optimistic about the future direction of development of mobile technology, providing excellent last mile Internet access services. technical analysis Technical DescriptionWMN, namely the wireless mesh network technology, is a special form of mobile AdHoc networks, early studies from the research and development of mobile AdHoc networks. It is a highcapacity highspeed distributed network, unlike a traditional wireless network, can be seen as the integration of a WLAN and AdHoc network, and play to the best of both worlds as a way to solve the last mile bottleneck problem, a new network structure. WMN with broadband wireless convergence connectivity, routing and fault detection features a unique advantage, no wired network resources. Actual network development, it can be a variety of broadband wireless access technologies such as , and 3G mobile munications, bining to form a multihop wireless links, wireless mesh networks. The wireless mesh network can effectively reduce the fault interference, reduce the transmitter power, extend battery life, and greatly improve the frequency reuse, in order to improve network capacity, wireless network coverage, and effectively improve the reliability of munication. networking programIn the wireless mesh network technology to build the network, its topology was grilllike, the entire network consists of the following ponents: th