Abstract-In a wireless mesh network (WMN) with a number of stationary wireless routers, the aggregate capacity can be increased when each router is equipped with multiple network interface cards (NICs) and each NIC is assigned to a distinct orthogonal frequency channel. In this paper, given the logical topology of the network, we mathematically formulate a crosslayer fair bandwidth sharing problem as a non-linear mixedinteger network utility maximization problem. An optimal joint design, based on exact binary linearization techniques, is proposed which leads to a global maximum. A near-optimal joint design, based on approximate dual decomposition techniques, is also proposed which is practical for deployment. Performance is assessed through several numerical examples in terms of network utility, aggregate network throughput, and fairness index. Results show that our proposed designs can lead to multi-channel WMNs which are more efficient and fair compared to their singlechannel counterparts. The performance gain on both efficiency and fairness increase as the number of available NICs per router or the number of available frequency channels increases. Index Terms-Wireless mesh networks, channel assignment, interface assignment, network utility maximization, exact binary linearization, approximate dual decomposition, fairness.
The authors have shown in REF that the network throughput as well as fairness increases as the number of available radio interfaces per router or the number of available orthogonal frequency channels increases.
Cross-Layer Fair Bandwidth Sharing for Multi-Channel Wireless Mesh Networks
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Computer Science