TCP-WBQ: a backlog-queue-based congestion control mechanism for heterogeneous wireless networks

Abstract

In heterogeneous wireless networks, random packet loss and high latency lead to conventional TCP variants performing unsatisfactorily in the case of competing communications. Especially on high-latency wireless links, conventional TCP variants are unable to estimate congestion degrees accurately for fine-grained congestion control because of the effects of random packet loss and delay oscillations. This paper proposes a TCP variant at the sender side to identify congestion degrees, namely TCP-WBQ, which quickly responses to the real congestion and effectively shields against random packet loss and oscillations of latency time. The proposed algorithm of congestion control firstly constructs a backlog-queue model based on the dynamics of the congestion window, and deduces the two bounds of the model which delimit oscillations of the backlog queue for non-congestion and random packet loss respectively. TCP-WBQ detects congestion degrees more accurately and thus implements the corresponding schemes of adjusting the congestion window, maintaining a tradeoff between high throughputs and congestion avoidance. The comprehensive simulations show that TCP-WBQ works efficiently in bandwidth utilization with single and multiple bottleneck scenarios, and achieves high performance and competitive fairness in heterogeneous wireless networks.

Adaptive Congestion Control Mechanism to Enhance TCP Performance in Cooperative IoV

“…In [25], the authors proposed (TCP-WBQ) another active queue management based congestion control approach which identifies the congestion based packet drop and random packet drop in the network. It maintains a backlog queue in the intermediate router for each TCP and based on the length of the backlog queue with respect to the outgoing packets, it updates congestion window.…”

HERA: High-Efficiency Resource Allocation Scheme for Newly Joined Mobile Terminal in Heterogeneous Wireless Network

“…As the future wireless communication network is expected to coexist with different standard and multi-bands, the differentwireless access point (WAP) with different radio standards is expected to coexist and other operates in non-overlapping frequency (9) ; thus, shared and the non-shared standard is expected to coexist in future HWNs. As a result, spectrum allocation is very challenging in HWNs (10) . For the general HWNs, as shown in Figure 1, it is necessary to study and analyze different spectrum allocation techniques and design an ideal spectrum allocation design for HWNs.…”