The Optimal Cross-layer Based Scheduling For IEEE 802.15.3 High-Rate Wireless PAN

With the features to support faster rate, provide more comprehensive services with QoS requirement and need less time to connect than Bluetooth, the upcoming high rate wireless personal area networks (WPAN) is attracting more and more attention worldwide. In June, 2003, IEEE 802.15.3 work group finished the standard of this high-rate WPAN and after that the UWB-based IEEE 802.15.3a was proposed which increased the transmission rate up to 480Mbps (MBOA) or 1320Mbps (DS-UWB). However, the increase of the transmission rate does not mean the improved capability of the networks. The optimal networks need an integrated and effective method to utilize the wireless link and coordinate the communications between any two devices in the networks. So an optimal scheduling scheme is necessary to improve the performance of the whole network. Nevertheless, up to now, there is not an integrated and efficient scheduling scheme in the standard. The existing scheduling schemes are either centralized or distributed, but none of them will work well in 802.15.3 on account of the different applied environments. Therefore, we proposed a cross-layer based scheduling scheme on accounting to improve the system capacity, utilize the limited resource effectively, save the energy and guarantee the fairness. Through simulation, we draw the conclusion that the higher the transmitting rate is, the more the energy will be consumed, so the more resources will be saved. However, the higher transmission data rate needs less channel time (CT) with the equal length of the transmission data. Thus by adjusting the transmission rate of the better link, the saved CT can allow more devices to access until the access number reach the maximum. Furthermore, by selecting the minimal difference of the consumed energy values caused by changing the rate in each link, the saved CT is at the cost of the minimal energy expenditure. As the...