Institute of Electrical & Electronic Engineers
Sensor network pose a number of challenging problems such as coverage, connectivity and tracking. The authors are considering a typical network consisting two major physical components. First, they have "Station". A station is an endpoint of connection with a wireless interface used to access the network. Typical examples of stations are laptop, mobile etc. Second the "Access Point". An access point has one wireless interface and one wired interface. The wired interface is effective between different access points and the wireless interface is effective between the stations and the access point. It is therefore the access point that connects the wireless LAN to the wired LAN. Also the radio propagation effects limit the range of wireless transmission.