SPIZ: An Effective Service Discovery Protocol for Mobile Ad Hoc Networks

The characteristics of mobile ad hoc networks (MANETs) require special care in the handling of service advertisement and discovery (Ad/D). In this paper, we propose a noble service Ad/D technique for MANETs. Our scheme avoids redundant flooding and reduces the system overhead by integrating Ad/D with routing layer. It also tracks changing conditions, such as traffic and service popularity levels. Based on a variable zone radius, we have combined push-based Ad/D with a pull-based Ad/D strategy

On the Capacity of Hybrid Wireless Networks with Opportunistic Routing

This paper studies the capacity of hybrid wireless networks with opportunistic routing (OR). We first extend the opportunistic routing algorithm to exploit high-speed data transmissions in infrastructure network through base stations. We then develop linear programming models to calculate the end-to-end throughput bounds from multiple source nodes to single as well as multiple destination nodes. The developed models are applied to study several hybrid wireless network examples. Through case studies, we investigate several factors that have significant impacts on the hybrid wireless network capacity under opportunistic routing, such as node transmission range, density and distribution pattern of base stations (BTs), and number of wireless channels on wireless nodes and base stations. Our numerical results demonstrate that opportunistic routing could achieve much higher throughput on both ad hoc and hybrid networks than traditional unicast routing (UR). Moreover, opportunistic routing can efficiently utilize base stations and achieve significantly higher throughput gains in hybrid wireless networks than in pure ad hoc networks especially with multiple-channel base stations

A Survey on Quality of Service Metrics Using Cross Layer Optimization Technique

Wireless Sensor Network (WSN) is group of sensor nodes connected in a network to monitor the physical situations and collect the information to communicate to sink node. The low-cost feature of WSN is a significant advantage over the conventional networks. The successful implementation of WSN requires to adapt a strict QoS metrics. Each application demands a specific QoS such as throughput, latency, reliability bandwidth etc. The cross-layer algorithm optimizes the overall performance. The efficient design of routing algorithm and cross layer optimization technique improves the performance of WSNs. This paper depicts the comparison of various optimization techniques on WSNs with their strengths and limitations. The cross-layer optimization techniques of previously proposed methods highlighting its merits and demerits to develop optimized cross layer technique