Joint coding bit‐rate and activity rate optimisation in wireless visual sensor networks

Distributed Joint Source-Channel Coding in Wireless Sensor Networks

Considering the fact that sensors are energy-limited and the wireless channel conditions in wireless sensor networks, there is an urgent need for a low-complexity coding method with high compression ratio and noise-resisted features. This paper reviews the progress made in distributed joint source-channel coding which can address this issue. The main existing deployments, from the theory to pra...

Optimal power allocation and joint source-channel coding for wireless DS-CDMA visual sensor networks

In this paper, we propose a scheme for the optimal allocation of power, source coding rate, and channel coding rate for each of the nodes of a wireless Direct Sequence Code Division Multiple Access (DS-CDMA) visual sensor network. The optimization is quality-driven, i.e. the received quality of the video that is transmitted by the nodes is optimized. The scheme takes into account the fact that ...

Coverage Quality in Visual Sensor Networks

Joint Power/Rate Optimization for CDMA-Based Wireless Sensor Networks

In this paper, we address the problem of minimizing energy consumption in a CDMA wireless sensor network (WSN), where multiple sensor nodes transmit data simultaneously to a common remote sink. A comprehensive energy consumption model is proposed, which accounts for both the transmit and circuit energy. Energy consumption is minimized by jointly optimizing the transmit power and transmission ti...

A Fuzzy Based Approach for Rate Control in Wireless Multimedia Sensor Networks

Wireless Multimedia Sensor Networks (WMSNs) undergo congestion when a link (or a node) becomes overpopulated in terms of incoming packets. In WMSNs this happens especially in upstream nodes where all incoming packets meet and directed to the sink node. Congestion in networks, if not handled properly, might lead to congestion collapse which deteriorates the quality of service (QoS). Therefore, i...