A Hop-by-hop Cross-layer Congestion Control Scheme for Wireless Sensor Networks

TL;DR

This paper proposes a hop-by-hop cross-layer congestion control scheme for wireless sensor networks that dynamically adjusts channel access and data rates based on MAC-layer information, improving packet loss, throughput, and energy efficiency.

Contribution

The paper introduces a novel cross-layer congestion control scheme (HCCC) that dynamically manages congestion in WSNs using MAC-layer information, outperforming existing schemes.

Findings

HCCC reduces packet loss ratio significantly.

HCCC improves network throughput.

HCCC enhances energy efficiency.

Abstract

Congestions in wireless sensor networks (WSNs) could potentially cause packet loss, throughput impairment and energy waste. To address this issue, a hop-by-hop cross-layer congestion control scheme (HCCC) built on contention-based MAC protocol is proposed in this paper. According to MAC-layer channel information including buffer occupancy ratio and congestion degree of local node, HCCC dynamically adjusts channel access priority in MAC layer and data transmission rate of the node to tackle the problem of congestion. Simulations have been conducted to compare HCCC against closely-related existing schemes. The results show that HCCC exhibits considerable superiority in terms of packets loss ratio, throughput and energy efficiency.