Dynamic Perfromance of an Enhanced Cooperative Strategy for Qos Improvement in Wlan

In Wireless Local Area Network, wireless node will suffer due to the hidden terminal node. This hidden terminal node leads to high collision, high drop rate of packets and high delay. To avoid this hidden terminal node, wireless nodes use the control messages to know the status of the destination nodes. Another issue in the WLAN is less coverage range with lesser number of nodes. To increase the more number of users as well as the Quality of Services in the Wireless Local Area Network, a new scheme as an Enhanced Cooperative Strategy for QoS Improvement (ECQI) is proposed. This proposed Enhanced Cooperative Strategy for QoS Improvement scheme uses the cooperative nodes between the source and destination node. Source node selects the Least Hop Count (LHC) path to transmit the data. Each cooperative node will amplify and forward the data. After every data transmission, transmitter node will wait for the acknowledgment. If the acknowledgment is not received within a particular threshold time interval, cooperative node will selects an alternate path based on the Least Hop Count path. Experimental results analyze the overall network performance using the Quality of Service parameters such as throughput, delay, drop rate, delivery rate, collision probability and network efficiency. The proposed Enhanced Cooperative Strategy for QoS Improvement scheme will increase the delivery rate, throughput, network efficiency and decreases the delay, drop rate and collision probability. KeywordsQoS ; Least Hop Count; throughput ; collision ; ECQI