Wireless Multimedia Sensor Networks (WMSNs), is a network of sensors, which are limited in terms\nof memory, computing, bandwidth, and battery lifetime. Multimedia transmission over WSN requires\ncertain QoS guarantees such as huge amount of bandwidth, strict delay and lower loss ratio\nthat makes transmitting multimedia is a complicated task. However, adopting cross-layer approach\nin WMSNs improves quality of service of WSN under different environmental conditions. In this\nwork, an energy efficient and QoS aware framework for transmitting multimedia content over\nWSN (EQWSN) is presented, where packet, queue and path scheduling were introduced. It adapts\nthe application layer parameter of video encoder to current wireless channel state, and drops less\nimportant packets in case of network congestion according to packet type. Finally, the path scheduling\ndifferentiates packets types/priority and route them through different paths with different\nQoS considering network lifetime. Simulation results show that the new scheme EQWSN transmits\nvideo quality with QoS guarantees in addition to prolonging network lifetime.
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