Hong Kong Network Services Co.,Limited-Abstract Wireless Mesh Networks

(The following information provided by Hong Kong Network Services Co.,Limited) Abstract Wireless Mesh Networks is a new type of wireless broadband access networks, it has wireless LAN network and the advantages of Adhoc, a self network, self-healing, Multi-hop cascade, such as intelligent nodes advantages of self-management, and mobile broadband, wireless positioning characteristics of wireless broadband access become an effective tool. This paper introduced the concept of Wireless Mesh Networks and system features elaborate Motorola Mesh technology system structure, frequency allocation and key technologies.

     0 Introduction

     Wireless Mesh Network (WMN) technology has been a military technology, mobile networks on the battlefield need for high data rate, low probability of being detected and the ability to prevent human interference, and with the Mesh technology on these capabilities. As a people 802.11, 802.11b and 802.11 g, and other local area network (LAN) technology understanding of the depth, Mesh technology business and only gradually become the focus of attention of consumers, and follow the evolution of different branches.

     At present, the industry's most discussed "wireless mesh" technology is a flexible wide-area wireless local area network (WLAN) solutions, it broke through the Wi-Fi technology for each access points wired requirements, multiple access Point wirelessly connected, the need for wiring can create a wireless network or "hot zone", thus providing a broad indoor and outdoor wireless coverage. At present, many well-known companies (such as Motorola, Cisco, Strix, Tropos, etc.) are already mature products come out, various industry organizations to promote the development of standards to promote mesh technology operable.

     At present, based on the Wireless Mesh Network technology integrates robust security and comprehensive manageability, and can provide flexible mobile broadband since Netcom Group letter, and a pair of local area reliability and security coverage has become, in line with international ITU (ITU) public protection and disaster relief (PPDR) operational requirements of a good solution. Mesh Networks not only help to improve the urban environment of information technology applications, and to enhance the city's comprehensive service capability also has a very prominent role.

     1, the concept of Wireless Mesh Networks

     Wireless Mesh Network is based on the IP protocol wireless broadband access technology, it combines WLAN and Adhoc network advantages, support multi-point-to-multipoint network structure, with the network, self-healing, Multi-hop cascade, node self-management Intelligent advantages, such as broadband and mobile, wireless location, and other characteristics, is a high-capacity, high-speed, wide coverage of the network, broadband access become an effective tool. In a sense, but more importantly Mesh Networks is a network architecture thinking, the main function in the absence of centre, since network, multi-level access and routing judgement jump choice.

     Wireless Mesh technology is a traditional wireless network completely different from the new wireless network technology. In the traditional WLAN, each client and have passed an access point (AP) connected to the wireless access to the network for users to communicate with each other, we must first visit to a fixed AP, the network structure known as single jump networks. Wireless Mesh Network in, any wireless device node can be at the same time as a router, each node in the network can send and receive signals, and each node can be of one or more nodes, such as direct communication.

     The greatest advantage of such a structure is: If recent AP-As a result of excessive congestion, data can be automatically re-routed to a smaller flow of communication nodes adjacent to the transfer. And so on, data packets can also network, routing to continue with the recent transfer of a node, until you reach the final destination so far. This is the form of multi-hop visit.

     In fact, we know the Internet is a typical example of Mesh Networks. When we sent an Email, e-mail is not directly to the recipient's mailbox, but through routers transmitted from a server to another server, and only after several routing transmitted to the user's mailbox. Transmitted in the process of router will usually choose the most efficient transmission path, so that e-mail to the user's mailbox as soon as possible. Therefore, the Wireless Mesh Network can be seen as "wireless Internet edition."

Hong Kong Network Services Co.,Limited