Congestion Control Protocols for Wireless Multimedia Sensor Networks

Wireless Sensor Network (WSN) are now evolved as Wireless Multimedia Sensor networks (WMSN) which are used to collect audio video data in various applications. Multimedia applications have become an essential part of our daily lives. In WMSN large amount of multimedia data is transmitted over network. The growing interest in WMSN applications increases challenges in congestion control protocols in these networks. To support quality of service (QoS) requirements for multimedia applications having a reliable and fair transport protocol is necessary. Congestion control is one of the main objectives of the transport layer in WMSNs. In event-driven applications, it is critical to report the detected events in the area, resulting in sudden bursts of traffic, causing loss of data. In WMSNs, Congestion control techniques are based on detection of congestion and recovery, but they cannot eliminate or prevent the occurrence of congestion. In this paper different congestion control protocols are discussed for multimedia communication in WMSN. A content aware cross layer congestion control protocol is suggested to avoid and control congestion.