QoS aware geographic routing protocol for multimedia transmission in wireless sensor network

摘要

Wireless sensor network (WSN) is a network of small, low power, resource constrained devices distributed in a large area. The principle focus of such network is to monitor some well-defined phenomenon in the sensor field. Availability of low power CMOS camera has offered wings to WSN applications. Broadening the range of applications from monitoring to multimedia surveillance. Multimedia transmission brings newer challenges primarily provisioning of the quality of service. Realtime video surveillance is one class of application which expects timely delivery of the packets. QoS aware routing protocols are required to cater to this demand. Geographic routing protocols are most suited WSN due to its scalability. GPSR, SPEED, and MMSPEED are the protocols which explore 1-hop neighborhood information in packet forwarding. Most of these protocols stations their routing decision on the location of sink and ignoring energy reserves of a node, which is crucial in each WSN application. A geographic routing protocol is proposed in this paper, which is energy aware. Also rather than sticking to maintaining 1-hop neighborhood information, it maintains n-hop neighborhood which helps early detection of void.