Learn more about wireless ATM LAN

The combination of ATM technology and wireless network is the wireless ATM technology. This asynchronous transmission method has become invisible and opened up a broader technical space. However, it also has its own shortcomings and will not be introduced for the time being. This article focuses on the wireless atm lan derived from the wireless ATM technology.

A wireless atm lan is a network system that extends the standard ATM technology to wireless transmission media. Compared with other wireless technologies, it has the advantages of fast transmission rate and QoS guarantee.

Broadband Wireless ATM LAN

In a wireless atm lan, there is a broadband adaptive belonging ATM network, short for broadband atm lan. The network consists of two network elements: Portable Base Station (PBS) and mobile terminal. The Base Stations in the network are movable and can be re-assembled and established at any time. Each PBS is combined with the ATM switching function in the wireless access port. Mobile terminals are assumed to be portable computers with wireless ATM functions.

In a broadband atm lan, network utilization is reduced by providing pre-calculated routes. To solve this problem, the virtual tree and related dynamic tree management algorithms are used.

Wireless atm lan Structure

ATM is a highly scalable technology. In wireless ATM, the same end-to-end network can be created to simplify the system design of the entire network.

A wireless ATM network consists of a core network and a wireless access network. The core network not only inherits the network structure of the GSM digital public network, but also has the ability of circuit and group switching. The Wireless Access Network is an extension of the core GSM network. It not only includes broadband code division multiple access (WCDMA) base stations and wireless network controllers, but also has all broadband wireless network functions. Because the wireless access network is connected to the core network through the ATM Transmission link, it can more effectively control data services based on group switching. Its network structure.

In a LAN, users exchange data through ATM and communicate data in a wireless manner. This network is flexible and convenient.

Remote switchover and location management of a wireless ATM LAN

The wireless atm lan over-the-zone switching solution can be divided into three types: anchor rerouting (commonly used in IS-41 and GSM cells), Dynamic Route Allocation and connection tree routing. The connection Tree Routing avoids partial disassembly and creation, minimizing the time of over-region switchover. However, this method does not indicate how to maintain the order of the code element during the over-the-zone switch. In order to maintain the sending feature of the code element during the switchover, the Group sent by the mobile terminal host should be first sent to the old switch, and the old switch should be forwarded to the remote host. Both upstream and downstream data must be forwarded.

Because the location of the mobile station is tracked by the Location Register of the ownership zone, in addition to sending incoming calls to the mobile terminal, the mobile station's location query should also be answered. Based on the frequency of tracking the location of the mobile station, if you only need to track the region where the mobile station is located, rather than the specific base station, you need to have a record on the wireless interface. The Location Management Solution of the wireless atm lan is to make every PBS know the identity of the mobile station covered by it, instead of using the server in the zone to track the location of the mobile terminal.

The wireless atm lan technology is an extension of the standard ATM and a developing technology. At present, the wireless atm lan technology has moved from concept to research and development, and is gradually productized and standardized.

Figure wireless atm lan Structure