Partially overlapped channel assignment for multi-channel multi-radio wireless mesh networks

Abstract

Partially overlapped channels (POCs)-based design has been identified recently as an emerging technology to further eliminate interference and improve network capacity. However, there are only few studies of channel assignment algorithms for POCs. In this paper, we research on utilizing POCs to improve network capacity and propose a traffic-irrelevant channel assignment algorithm, which assigns channels for all links in the network while minimizing total network interference. Theoretical calculation approach is utilized to obtain the direct relationship between interference ranges and channel separations, which can be easily applied to mesh networks with various configurations without modification. As traffic between the Internet and clients is considered to be dominant, distance from the gateway, number of neighbors, and interference are used to determine the channel assignment order of links. Simulation results reveal that network throughput and end-to-end delay performance can be dramatically improved by fully exploiting POCs as well as orthogonal channels.

A novel adaptive spectrum allocation scheme for multi-channel multi-radio wireless mesh networks

“…A cross-layer optimization problem combining rate control, NC and link scheduling with wireless broadcast was studied in Cui et al (2010), where the authors demonstrated that in some cases the proposed method with broadcast feature has even lower complexity than the case without broadcast transmission. However, the authors in Wang et al (2015) and Rajawat and Giannakis (2011) only considered the protocol interference, while ignoring the information in the physical layer. Initial works in the scheduling problem mainly employ simplistic channel models, such as the collision channel, where the transmission "range" is chosen arbitrarily and no interference is assumed outside the transmission range.…”

“…Alicherry et al (2005) proposed a joint CA and routing scheme for the purpose of maximizing network capacity subject to fairness constraints in WMNs. Both distributed and centralized load-aware CA algorithms were presented by Wang et al (2015) to make transmission decisions dynamically based on network traffic. The study on CA in MC-MR network has become a hot topic after these pioneer works.…”

Minimization of Information Asymmetry Interference using Partially Overlapping Channel Allocation in Wireless Mesh Networks

“…The experiment based on BFS-MinNICA results in significant performance improvement at varying interference levels. Wang et al, in [9] proposed that the network capacity can be improved by utilizing POCs, which assign channel to all the links while minimizing total network interference. The direct relationship between interference range and channel separation was calculated.…”

Optimal interference range for minimum Bayes risk in binomial and Poisson wireless networks

“…Under the protocol interference model, the transmission between the reference receiver and the reference transmitter is successfully received, when there is no interference transmitter within the interference range of the reference receiver [1]. In the last two decades, interference range is widely used in wireless networks, such as ad hoc networks [2][3][4][5], wireless mesh networks [6][7][8][9][10], sensor networks [11,12], cellular networks [13,14], and WiMAX networks [15]. The setting of interference range has a large effect on the performance of wireless networks [10,11,16,17].…”

“…In wireless networks based on the IEEE 802.11 standard, interference range is usually set to be twice as large as the transmission range [7,8,18,19]. In CSMA-based wireless networks, the interference range is set equal to the carrier sensing range [4,6,9,20]. Several works [2,4,[21][22][23] set the interference range by restricting the signal-to-interference-and-noise ratio (SINR) to a threshold.…”