Abstract
Multimedia applications are routed from source nodes via neighboring nodes to a sink in Wireless Multimedia Sensor Networks (WMSNs). However, the existing routing protocols in the WMSNs do not fulfill the quality of service (QoS) constraint yet for multimedia transmission. The WMSNs have specific characteristics such as multi-hop way, limited node capability and varying bandwidth, which can affect the quality of service of multimedia applications during the routing process. The best quality of service (QoS) is required by the multimedia applications consisting of high throughput, low end-to-end delay and low packet drop rate. A routing optimization based on the cross-layer design is proposed for multimedia transmission in the WMSNs. The cross-layer design utilizes H.264/Scalable Video Coding (SVC) and IEEE 802.11e Enhanced Distributed Channel Access (EDCA) and has been implemented in Network Simulator 2 (NS2) simulation. The NS2 simulation indicates that the H.264/SVC video application has an average delay of 0.02 sec. Thus, the routing optimization has accomplished to deliver multimedia application successfully via Wireless Multimedia Sensor Network (WMSN).
Highlights
Nodes must be able to work together to transmit data from the source node via neighboring nodes to the sink in the Wireless Multimedia Sensor Networks (WMSNs)
The routing optimization based on crosslayer design provides better throughput for the first important data stream when Destination-Sequenced Distance Vector Routing (DSDV) and Enhanced Distributed Channel Access (EDCA) protocols are utilized in the proposed cross-layer design
Dynamic Source Routing (DSR) has a better ability to obtain routing information than Ad hoc On-Demand Distance Vector (AODV). It indicates that the routing optimization based on crosslayer design provides lower delay results for the "Foreman" H.264/Scalable Video Coding (SVC) video when DSR and EDCA protocols are utilized in the model of cross-layer design
Summary
A multi-level network of different sensor nodes divides and processes audio, videos and scalar data from the environment into different layers. Completion of optimization problems using dynamic programming approach to the method of Cross-Layer Design is carried forward (forward recursive equation) and consists of four stages of the decision. To optimize the routing process for multimedia transmission in the WMSN, the procedure of cross-layer design of the Open Systems Interconnection (OSI) layers is conducted. The process of decisions distribution is conducted to deliver the results of the data optimization back into the application, network and data link layer. The proposed cross-layer design utilized the Ad hoc On-Demand Distance Vector (AODV), the Destination-Sequenced Distance Vector Routing (DSDV) and the Dynamic Source Routing (DSR) as routing protocols at the network layer. These priorities of EDCA represent P1, P2 and P3 in dynamic programming approach
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