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Sink deployment in Wireless Surveillance Systems

In this paper, we investigate the Access Point (AP) deployment problem in Wireless Surveillance Systems (WSSs). Cameras in a WSS could have various demanding upload streaming rates to the AP (usually deemed as a sink or data collector) according to their surveillance requirements, e.g. object detection frequency, video resolution, or the successful ratio of object tracking. Therefore, a suitable AP location must be determined in order to satisfy each camera's demand. We first provide a mathematical formulation that defines the best location of the AP, and then propose a novel mechanism, called Spring-Cam, to exploit the concept of mass-spring systems in Physics to locate the suitable AP location with consideration of camera demands as well as transmission quality of the link between each camera and the AP. Simulation results show that Spring-Cam can use only a limited measurement overhead to find an AP location that achieves a performance comparable with exhausted searching the best location.