Shangkun Xiong

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Wireless sensor network (WSN) is expected to have a significant impact on the efficiency of military and civil applications. Routing in WSNs is very challenging due to their inherent characteristics. Currently, many routing protocols have been proposed for WSNs, and energy efficiency is their primary objective. In the paper, a mobile agent diffusion routing(More)
Distributed video sensors usually use fairly low-resolution images due to the limited transmission bandwidth in transmitting images. It is potential to enhance the captured low-resolution images using image resolution enhancement technique that is able to produce a high-resolution image from its low-resolution counterpart. The key challenge of image(More)
Distributed antenna systems (DAS) have been shown to be an efficient scheme to improve coverage and performance of wireless communications system. In this paper, we investigate the energy efficiency of a single-cell DAS. Given the coverage area and user distribution, Firstly we develop a general model for joint optimization of the number and location of the(More)
The 3GPP Long-Term-Evolution system applies pure packet-switch architecture. Meanwhile, the LTE radio access has a short Transmission Time Interval (TTI) of 1ms in order to reduce end-to-end delays. Such burst transmission cause major difficulty in voice transmission over LTE (VoLTE), especially for uplink transmission at the cell edge. TTI bundling has(More)
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