This work focuses on Buffer controllable TCP which is a congestion control protocol based on explicit feedback from routers. It controls the queue length of bottleneck that leads to excellent delay and utilization which makes it applicable to Wireless Sensor Networks (WSN). This project uses the congestion control algorithm and achieves the balance between the delay, throughput and fairness. Also, BCTCP based on link feedback is designed and implemented in this work.
BCTCP brings the maximum load factor of the present network from the router and transfers the data to the end host. Before accomplishing forwarding action, the router has to write the load factor of the router into the packets. The router will compare the load factor with the maximum load factor that is recorded previously. The recorded value is updated regularly. The load factor is passed through the ACK packet. Ip option is used to store the load factor and the TCP option is used to return the load factor. BCTCP uses a congestion control mechanism that depends upon the pacing rate and congestion window. The maximum transmission rate is updated according to the load factor of the network.
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