PhD in Congestion Control in WSN

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PhD in Congestion Control in WSN

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.  

Fig: Work process of BCTCP protocol

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.

PhD in Congestion Control in WSN

Problem Statement

  • The existing system occupies more buffer
  • Causes high delay and variation
  • Existing systems such as Active Queue Management (AQM) and Explicit Congestion Control (ECN) may cause low utilization
  • The existing system such as TCP cubic do not maintain a steady state and delivers poor result.
  • The fairness convergence of TCP BBR is not favourable.

Proposed Solution

  • Lowers the variation of throughput and delay
  • Achieves proper balance between the delay and utilization
  • Buffer size of the router is controlled in the proposed BCTCP protocol.
  • Achieves better results in link utilization, delay and fairness.
  • It can compete with the burst traffic
  • It is suitable for the networks which has high throughput and delay needs.
  • The throughput is much higher than the traditional TCP in a network with random packet loss.

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