User Speed Estimation and Dynamic Channel Allocation

The huge amount of handoffs generated b y microcells c r ea t e s a problem for the future PCN. To alleviate the problem, we p ropose a hierarchical cellular s y s t e m which comprises cells of different sizes. Ideally, one would like t o use large cells to serve high-mobili ty users. A challenging issue is to obtain a good estimate of the user speed. In this paper, a simple speed est imation is p roposed and based on th i s estimate one can implement a number of dynamic channel allocat ion algorithms on such a hierarchical network. A comparative s t u d y of these algori thms will be presented based on a detailed simulation model .