MIHBS: A Mobile Interface of High Bandwidth for Wireless Sensor Networks

In modern days, wireless sensor networks and smart phones have been widely used in various application domains including healthcare, environment, and intelligent building monitoring. Although the existing smart phones, such as iPhone, SAMSUNG, and Lumia, have in-built sensors of location, camera, and accelerometer, their sensing capabilities are limited. Besides, the transmission rate of ZigBee can reach 250 kbps, which is much higher than that of smart phones’ headset port. It is necessary to keep the balance between them. In this paper, we propose an enhanced Lempel-Ziv-Welch coding scheme which is introduced to help transmit data faster, called LZW-Huffmam. Further, we apply it in a self-designed mobile extension, mobile interface of high bandwidth for sensor network (MIHBS), which is a universal interface that can transfer data to and from sensors using standard headset port of high bandwidth. LZW-Huffman can help increase the bandwidth of MIHBS by 52%.