Sabtu, 19 Februari 2011

Wireless LAN Topology

1. Centralized
Another name is star or hub-based network. This topology composed from a server and some user terminals, where communication between user terminals must go through the terminal server first. The benefit is enough large coverage area, transmission relative efficient and relatively simple design of the terminal because of the complexity there is not on the server. The weakness is delay of wireless LAN large and if the network broken then the network could is work

2. Distributed
Could be called with peer to peer, where
all terminals could communicate with each other without requiring a controller (server). Here server is required to connect the wireless LAN to other LAN. This topology could support mobile operations and is the ideal solution for ad hoc networks. Advantages if one broken then the network terminals remain functional, less delay of and complexity of the planning was minimal. The weakness is there is not a network control unit (power control, access and timing).

3. Cellular network
This network is suitable to serving large coverage area and mobile operations. This network
utilizes the concept of microcell frequency technique. The benefit is could combine the advantages and remove weaknesses from both of topologies above. The weakness to have a high design complexity.

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