Wireless Communication

S. Deepu ¹, Vishnu Rajan ², Kiran K. Varghese ², Lilli Malarvizhi ¹

Affiliations
1 Karunya Institute of Technology and Science, Coimbatore, IN
2 Department of Electronics and Communication, Karunya University, Coimbatore, Tamil Nadu, IN

Abstract

In order to improve network performances in WMN, a reliable and efficient channel allocation is needed. This paper focus on solving the channel allocation problem with a Rate-Based Channel Assignment (RB-CA) protocol to alleviate performance anomaly by using multiple channels in WMNs. RB-CA exploits a new metric, called Prioritized Transmission Time (PTT) and Load Traffic Count (LTC) , in order to form High-rate Multi-channel Paths (HMPs). Extensive NS-2 simulations and experiments in a real test-bed can be used to evaluate the performance of RB-CA. The simulation and experimental results can show that RB-CA achieves improved performance in terms of aggregate throughput, end-to-end delay, and energy.

Keywords

Wireless Mesh Networks (WMN),Rate-Based Channel Assignment, Prioritized Transmission Time, Load Traffic Count, High-Rate Multi-Channel Paths.

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Kiran K. Varghese ¹, Lilli Malarvizhi ², Vishnu Rajan ², S. Deepu ²

Affiliations
1 Department of Electronics and Communication Engineering, Karunya University, Karunya Nagar, Coimbatore, IN
2 Department of Electronics and Communication Engineering, Karunya University, Karunya Nagar, Coimbatore, IN

Abstract

Wireless mesh networks (WMNs) have been attracting significant attention due to their promising technology. The WMN technology is becoming a major avenue for the fourth generation of wireless mobility. In a Wireless Mesh Network, Mesh Routers (MRs) are interconnected by wireless links and constitute a wireless backbone to provide ubiquitous high-speed Internet connectivity for mobile clients (MCs). The wireless backbone is tightly integrated with the Internet by some selected nodes called as Gateways. The gateway has more capabilities than a simple MR and is more expensive. In this paper, the performance of WMN is improved by an energy aware gateway selection mechanism where the gateway is selected based on the threshold energy. Here the gateway to which the mesh routers are connected keeps on changing depending on the energy level of the current gateway. The performance of WMN using the single gateway is compared with the energy aware gateway selection scheme using ns2 simulator and the energy aware gateway selection scheme is found to exhibit more performance than the normal single gateway WMN architecture.

Keywords

Wireless Mesh Networks (WMN), Gateways, Mesh Router, Mobile Client, Energy, Threshold.

Full Text

     

Lilli Malarvizhi ¹, Vishnu Rajan ¹, S. Deepu ¹, Kiran K. Varghese ²

Affiliations
1 Department of Electronics and Communication Engineering, Karunya University, Karunya Nagar, Coimbatore 641114, IN
2 Department of Electronics and Communication Engineering, Karunya University, Karunya Nagar, Coimbatore 641114, IN

Abstract

Mesh networks are considered to be the future of internet, with an extra potential offering high transmission speed and low cost. But the common single gateway architecture is inadequate for clubbing this high speed network with the outer networks. In the future, the WMN technology may get extended to such a level that the effective usage of constrain based scheduling of the gateways used in WMNs will pave a new opening towards high speed networks. In this paper, the performance of WMN is increased by implementing multiple gateways for coupling the WMN with the external networks and the gateways are selected based on the load threshold method. The performance of WMN using both the single gateway scheme and the load threshold based multiple gateway scheme are compared using ns2 simulator and the load threshold based multiple gateway method is found to exhibit more performance than the single gateway based one.

Keywords

Wireless Mesh Networks (WMN), Gateways, Load, Threshold.

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