Merge-and-forward: a cooperative multimedia transmissions protocol using RaptorQ codes

2016 ◽  
Vol 10 (15) ◽  
pp. 1884-1895 ◽  
Author(s):  
Muhammad Talha Gul ◽  
Amjad Ali ◽  
Deepak Kumar Singh ◽  
Umera Imtinan ◽  
Imran Raza ◽  
...  
Keyword(s):  
Multimedia Transmissions

scholarly journals Fault Tolerant Mechanism for Multimedia Flows in Wireless Ad Hoc Networks Based on Fast Switching Paths

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Juan R. Diaz ◽  
Jaime Lloret ◽  
Jose M. Jimenez ◽  
Sandra Sendra ◽  
Joel J. P. C. Rodrigues
Keyword(s):  
Fault Tolerance ◽  
Wireless Ad Hoc Networks ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Fault Tolerant ◽  
Research Work ◽  
Convergence Time ◽  
Wireless Ad Hoc Network ◽  
Qos Parameters ◽  
Multimedia Transmissions

Multimedia traffic can be forwarded through a wireless ad hoc network using the available resources of the nodes. Several models and protocols have been designed in order to organize and arrange the nodes to improve transmissions along the network. We use a cluster-based framework, called MWAHCA architecture, which optimizes multimedia transmissions over a wireless ad hoc network. It was proposed by us in a previous research work. This architecture is focused on decreasing quality of service (QoS) parameters like latency, jitter, and packet loss, but other network features were not developed, like load balance or fault tolerance. In this paper, we propose a new fault tolerance mechanism, using as a base the MWAHCA architecture, in order to recover any multimedia flow crossing the wireless ad hoc network when there is a node failure. The algorithm can run independently for each multimedia flow. The main objective is to keep the QoS parameters as low as possible. To achieve this goal, the convergence time must be controlled and reduced. This paper provides the designed protocol, the analytical model of the algorithm, and a software application developed to test its performance in a real laboratory.

scholarly journals Evaluation of Video Quality in Wireless Multimedia Sensor Networks

2016 ◽  
Vol 6 (1) ◽  
pp. 223
Author(s):  
Mustafa Shakir ◽  
Obaid Ur Rehman ◽  
Zeeshan Abbas ◽  
Abdullah Masood ◽  
Wajeeha Shahid
Keyword(s):  
Sensor Networks ◽  
Signal To Noise Ratio ◽  
Video Quality ◽  
Discrete Event ◽  
Wireless Multimedia ◽  
Multimedia Sensor Networks ◽  
Opinion Score ◽  
Different Types ◽  
Multimedia Transmissions

<p class="Default">Simulating wireless sensor networks; there implementation and evaluation, require the use of a discrete event simulator. Omnet++ is quite a powerful simulator which supports concise and easy modeling of wired as well as wireless sensors environment. Scenarios involving multimedia transmissions with characteristics of video quality control and evaluation must be computed on the basis of Quality of Experience which relies on user’s perception to maintain the video quality. For the multimedia growth and awareness of future WMSNs, it is quite necessary that the performance should be tested for different types of radio models. So varying the radio parameters may allow for the optimization and improvement of the video quality. In this paper we have provided a test bench for the easy evaluation and optimization of the performance of WMSNs using different radio models. The performance is evaluated based on the QoE metrics; i.e. PSNR(Peak Signal-to-Noise ratio) and MoS(Mean Opinion Score), which depend on user’s perception to maintain the video quality.</p>

Sign in / Sign up

Export Citation Format

Share Document