The channel assignment problem in wireless mobile network is consist of the assignment of appropriate frequency spectrum channels to requested calls while satisfying the electromagnetic compatibility (EMC) constraint. However with the limited capacity of wireless mobile frequency spectrum, an effective channel assignment technique is important for resource management and to reduce the effect of...

Many appealing multicast services such as on-demand TV, teleconference, online games and etc. can benefit from high available bandwidth in multi-radio multi-channel wireless mesh networks. When multiple simultaneous transmissions use a similar channel to transmit data packets, network performance degrades to a large extant. Designing a good multicast tree to route data packets could enhance the...

The increasing demand for large and low cost wireless coverage, ranging from campus to city wide areas, has motivated a high interest in multihop communications with Wireless Mesh Networks (WMN) based on IEEE 802.11s as the most recent and significant standard. Channel Assignment (CA) is a mechanism which selects the best channels for an individual wireless node or the entire network aiming to ...

Channel assignment mechanisms in multi-channel wireless networks are often designed without accounting for adjacent-channel interference (ACI). To prevent such interference between different users in a network, guard-bands (GBs) are needed. Introducing GBs has significant impact on spectrum efficiency. In this paper, we present channel assignment mechanisms that aim at maximizing the spectrum e...

The present paper puts forward an efficient ‘First decompose, then Solve’ solution strategy for Channel Assignment Problems (CAP) in Cellular Communications System. The underlying objective of the decomposition technique presented in this paper is that the Interference Graph (IG) developed for intractable CAP be broken down into sub-graphs (Channel Assignment Sub-Problems, CASP’s) of lower comp...

We study high-throughput multicast solutions for wireless mesh networks (WMN). Two techniques in WMN design are considered for combating wireless bandwidth limitations and wireless interference, respectively: introducing multiple mesh gateways and exploiting the diversity of wireless channels. We target a cross-layer solution that jointly (a) selects appropriate channels for each mesh node to u...

Wireless local area network (WLAN’s) using single channel have limited bandwidth. Channel interference between Access Points (APs) of WLAN also decreases the network throughput. The solution of this problem is to transmit data simultaneously on multiple channels is considered as an alternative. In this paper, we propose a channel assignment algorithm for wireless local area network (WLAN) to an...

In modern VLSI design, interconnection delay dominates the circuit delay due to its heavy downstream capacitance. Buffer insertion is a widely used technique for splitting a long wire into several buffered wire segments for circuit performance improvement. In this paper, we investigate buffer insertion issues in structured ASIC design style. We design the layout for two dedicated buffers and ex...

In modern VLSI design, interconnection delay dominates the circuit delay due to its heavy downstream capacitance. Buffer insertion is a widely used technique for splitting a long wire into several buffered wire segments for circuit performance improvement. In this paper, we investigate buffer insertion issues in structured ASIC design style. We design the layout for two dedicated buffers and ex...