High Reliable Relay Selection Approach for QoS Provisioning in Wireless Distributed Sensor Networks

Yong Jin

doi:10.1155/2013/216478

Abstract

In wireless distributed sensor networks, one open problem is how to guarantee the reliable relay selection based on the quality of services diversity. To address this problem, we focus on the reliable adaptive relay selection approach and adaptive QoS supported algorithm, based on which we present a Markov chain model, in consideration of different packet states and error control algorithm assignment. The mathematical analyses and NS-2 simulation results show that the proposed relay selection approach could perform better in terms of saturation throughput, reliability, and energy efficiency, compared with the traditional approaches. More importantly, the quality of real-time multimedia streaming is improved significantly, in terms of decodable frame ratio and delay.

Highlights

It is well known that delivering and transmitting various data over wireless distributed and dynamic networks is a very challenging task
There is an open problem in the relay selection approach design: how to take advantage of the requirements information of QoS diversity in the wireless distributed sensor networks to find out the optimal relay for forwarding data packets from the potential relays
In our previous research achievements [18], the performance of automatic repeat request (ARQ) or hybrid ARQ (HARQ) scheme has a close relationship with distance and d0 at first

Summary

Introduction

It is well known that delivering and transmitting various data over wireless distributed and dynamic networks is a very challenging task. Data transmission over wireless channel suffers from the limited bandwidth, high packet loss rate, dynamic changes of channel state, sensor nodes mobility, channel competition, and so forth [1]. These constraints and challenges, in combination with the delay and loss of sensitive nature of multimedia applications [2], make QoS provisioning over wireless sensor networks a challenging proposition. There is an open problem in the relay selection approach design: how to take advantage of the requirements information of QoS diversity in the wireless distributed sensor networks to find out the optimal relay for forwarding data packets from the potential relays

Objectives

Results

Conclusion