Date Added: Oct 2012
In telecommunications networks, congestion is the condition that arises when a system or a network experiences a level of offered calling activity or message traffic that exceed its capacity. In data networks, congestion occurs when the number of packets being transmitted through the network approaches the packet handling capacity of the network. In cellular networks, congestion during peak periods and at hot spots is a major problem being faced today almost everywhere especially in urban areas and metropolitan cities. Increase in channel capacity may appear to be a natural solution to this problem. However, it is not economically viable due to the heavy cost of infrastructure involved. Since the traffic demand is increasing on daily basis, the problem of congestion is going to persist.