Improvement of TCP Congestion Window over LTE-Advanced Networks

Abstract: Long Term Evolution Advanced (LTE-Advanced) network is the continuation of 3GPP-LTE (3GPP: 3rd Generation Partnership Project) and it targets to advanced develop of the requirements of LTE in terms of throughput and coverage. Then, LTE- Advanced is not new as a radio access technology, but it’s an evolution of LTE to enhance the performance. The direct employment of the existing protocols cannot achieve the requirements of LTE-Advanced due to the large-bandwidth and low-latency links used in this network. Therefore, an enhanced congestion control mechanism is proposed in this article to improve the performance of Transmission Control Protocol (TCP) over LTE-Advanced. The proposed algorithm used a new mechanism based on the available bandwidth of the connection to detect the capacity of network path in order to improve the congestion avoidance mechanism. The work in this paper based on using Network Simulator 2 (NS-2) to model the traffics of LTE-Advanced and tests the proposed mechanism.

Keywords: TCP;congestion avoidance, congestion control; LTE; LTE-Advanced; NS-2