Comparison of QoS-aware single-path vs. multi-path routing protocols for image transmission in wireless multimedia sensor networks
Özet
Wireless multimedia sensor network (WMSN) applications require strong multimedia
communication competence. Therefore, in WMSN applications, it is necessary to use specific mechanisms in order to handle multimedia communication challenges and address
desired energy efficiency and reliability goals. Nevertheless, the existing communication
protocols are not suitable for the communication challenges and the desired goals. In this
respect, specific mechanisms for prioritization, link-quality estimation and multi-path
selection can be employed by quality of service (QoS)-aware routing protocols to meet
the reliability and delay requirements of WMSN applications.
In this study a novel approach is proposed to set different reliability values for image
packets for image transmission in WMSNs. Using this prioritization, important parts of
an image are assigned high priority and take priority during data transmission. In order
to evaluate the proposed approach, the performance of single-path and multi-path
QoS-aware routing protocols has been investigated for WMSN-based image transmission
applications. Specifically, comparative performance analysis of single-path routing and
multi-path routing in image transmission have been conducted in terms of peak
signal-to-noise ratio (PSNR), average delay, reachability, and control overhead. As proven
by the results of the performance evaluations in this study, multi-path routing is better
than single-path routing in terms of reliability. On the other hand, at high traffic loads,
multi-path routing may perform worse in terms of delay due to its associated overhead.
