Positioning sensor nodes and smart devices for multimedia data transmission in wireless sensor and mobile P2P networks

In recent, studies on multimedia data transmission have been progressing in a wireless sensor network that consist of a large number of sensor nodes and a mobile P2P network that consists of a large of number of smart devices such as smart phones and wearable devices. When multimedia data such as image, audio, and video are transmitted, it is important to figure out the positions of a sensor nodes and a smart device in the networks. However, existing positioning schemes do not consider network holes that can occur in real application areas, thereby causing many errors during positioning. In this paper, we propose a new positioning scheme considering holes in wireless sensor and mobile P2P network environments. In the proposed scheme, holes are detected based on neighboring node density when holes exist in a network, and the position of a sensor node or a smart device is estimated by conducting distance correction based on the cumulative number of hole-boundary nodes. Through the proposed scheme, highly accurate sensor positioning can be performed even in circumstances where holes are present over a network. To verify the good performance of the proposed scheme, a performance evaluation is conducted by comparing it with existing schemes. It is shown through experiments that the proposed positioning scheme transmits multimedia data to the destination node without data loss when the holes in the network exist.