Fairness enhancement in IEEE 802.11s multi-hop wireless mesh networks

Abstract

Wireless mesh network (WMN) is a practical and cost effective solution for home and business networks. However, in multi-hop wireless mesh networks, the throughput decays significantly with an increase in hop counts. This is primarily due to the increase in successive spatial contentions. As a result, flows with longer hops from the gateway suffer from bandwidth starvation and fair link access disparities. In this paper, we show that the packet size and the minimum contention window size (CW ) play an essential role in improving fairness in multi-hop WMNs. Based on their location in the network and their traffic load; nodes may adapt different packet sizes and various CW s to improve their throughput. We present a Fair Share Algorithm (FSA) that assists each node in computing a fair packet size and a fair CW . We demonstrate that the FSA accomplishes considerably better fairness with minimal negative affect on the overall system throughput. The algorithm results are evaluated and compared with the performance of the default IEEE 802.11 MAC protocol used in wireless mesh networks.

Static characterized hybrid wireless mesh protocol for Smart Grid neighbourhood area networks

“…All the users in the Smart Grid should be serviced with guaranteed QoS. In [7], the author improved the fairless problem in the 802.11s mesh network by proposing a fair share algorithm (FSA) which allows node to adapt different packet sizes and various contention windows according to the location and traffic load. Nevertheless, the scenario used in the work does not show the impact of the routing protocol upon the network performance.…”

Achieving Transmission Fairness in Distributed Medium Access Wireless Mesh Networks: Design Challenges, Guidelines and Future Directions

“…Applying this model to the concurrent transmission scenario as shown in Figure 3 for a contention based shared medium access scheme where Tp is unbounded, indicating that constrains in concurrent transmission between multi-hops could limit the per user throughput when multiple user consume network bandwidth [14] …”

A dynamic adjustable contention period mechanism and adaptive backoff process to improve the performance for multichannel mesh deterministic access in wireless mesh LAN

“…Because the MMDA algorithm uses the contention mechanism to reserve MDAOPs, an MP may reserve more MDAOPs than the other MPs and result in unfairness problem. The contention window (CW) size may play an essential role in improving fairness [32]; therefore, ABP is to adjust the backoff time parameters according to the number of MDAOPs owned by an MP, which allows the MP having less MDAOPs may have higher probability to reserve MDAOPs.…”