Abstract
With the advancement of wireless access networks and mmWave New Radio (NR), new applications emerged, which requires a high data rate. The random packet loss due to mobility and channel conditions in a wireless network is not negligible, which degrades the significant performance of the Transmission Control Protocol (TCP). The TCP has been extensively deployed for congestion control in the communication network during the last two decades. Different variants are proposed to improve the performance of TCP in various scenarios, specifically in lossy and high bandwidth-delay product (high-BDP) networks. Implementing a new TCP congestion control algorithm whose performance is applicable over a broad range of network conditions is still a challenge. In this article, we introduce and analyze a Dynamic TCP (D-TCP) congestion control algorithm over mmWave NR and LTE-A networks. The proposed D-TCP algorithm copes up with the mmWave channel fluctuations by estimating the available channel bandwidth. The estimated bandwidth is used to derive the congestion control factor N. The congestion window is increased/decreased adaptively based on the calculated congestion control factor. We evaluated the performance of D-TCP in terms of congestion window growth, goodput, fairness and compared it with legacy and existing TCP algorithms. We performed simulations of mmWave NR during LOS NLOS transitions and showed that D-TCP curtails the impact of under-utilization during mobility. The simulation results and live air experiment points out that D-TCP achieves 32.9% gain in goodput as compared to TCP-Reno and attains 118.9% gain in throughput as compared to TCP-Cubic.
Highlights
Mobile networks have been making significant progress over the last decade and will be performing an important role in access networks
Some recent studies [4], [17]–[19] analyze the performance of Transmission Control Protocol (TCP) in 5G mmWave Networks. They have highlighted that high variability of the signal quality over mmWave links and blockage results in low utilization of resources and degrades the TCP goodput. Motivated from these limitations posed by 5G mmWave, we designed a dynamic congestion control algorithm to achieve the higher goodput as compared to existing algorithms while maintaining friendliness and fairness
We prove the efficiency of Dynamic TCP (D-TCP) in terms of fairness, friendliness and network utilization
Summary
Mobile networks have been making significant progress over the last decade and will be performing an important role in access networks. They have highlighted that high variability of the signal quality over mmWave links and blockage results in low utilization of resources and degrades the TCP goodput Motivated from these limitations posed by 5G mmWave, we designed a dynamic congestion control algorithm to achieve the higher goodput as compared to existing algorithms while maintaining friendliness and fairness. Contributions: In this paper, we propose Dynamic TCP (D-TCP) congestion control algorithm for generation mobile networks, which considers the dynamics of mmWave and adapts the High BDP and low lossy rate conditions.
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