An efficient traffic control system using dynamic thresholding techniques in wireless mesh networks

Abstract

SUMMARYWireless mesh networks (WMNs) depend on a resilient and high-performance infrastructure to provide users pervasive Internet access. In WMNs, all Internet traffic will be forwarded to the Internet gateways. Hence, these gateways are generally bottleneck nodes. This work proposes a traffic control technique to reduce the bottleneck problem and increase the utilization of network resources. Our approach provides a traffic control strategy that exploits dynamic techniques to adjust the threshold according to the traffic load of each gateway. The base threshold is defined in order to effectively control the traffic. When the current load exceeds the threshold of a gateway, the traffic redirection strategy is implemented by switching border nodes. The service regions can be adjusted for each gateway based on the traffic load. Furthermore, the proposed dynamic thresholding approaches can distribute the workloads of gateways and maintain the thresholds of any two gateways within a level range, making an in-band balance of load. Thus, our proposed scheme can handle the unnecessary traffic redirection and reduce the traffic control overhead for various distributions of traffic. Experimental results demonstrate that our scheme outperforms other schemes in terms of packet delivery ratio and efficiency, especially in bursty traffic environments.

A Hybrid Adaptive Traffic Control Strategy in Wireless Mesh Networks

“…We considered the benefit of gateway-based and path-based traffic control in the proposed scheme. We extend our research [11] to develop the admission control scheme. Meanwhile, the local congestion problem (hot spot) can also be solved by our k-level congestion awareness strategy.…”

“…In our performance evaluation, the proposed method (GW+Path-based) is compared with our previous work (GWbased) [11], shortest-path (SP) scheme, traditional boundarymoving (TBM) schemes [17], and minimum load-index (MLI) schemes [8]. The SP scheme selects a default gateway with a smaller hop count than the other schemes.…”

Joint channel assignment and routing in multiradio multichannel wireless mesh networks with directional antennas

“…Applying directional antennas in MRMC-WMNs may overcome the limitations of traditional single-radio single-channel WMNs and opens a more promising avenue toward interference alleviation. In MRMC-WMNs with directional In addition, our formulation also resolves bottlenecked gateway problems [19] of the internal traffic since congestion has been properly modeled as part of the MILP problem. (4) Efficient interference modeling: The interference considered is not only limited to adjacent links.…”

Cross Layer Based Congestion Control in Wireless Mesh Networks

“…Loss of packets can be detected in two ways, either through a retransmission timeout or when a marginal volume of duplicate acknowledgement is received. A duplicate acknowledgement is a sure indication of out-of-order packet reception by the receiver, meaning a packet drop [25][26][27][28][29][30][31][32][33][34][35].…”