Dynamic bandwidth reservation in cellular networks using road topology based mobility predictions

In cellular networks, an important call-level quality-of-service (QoS) issue is how to limit the probability of forced termination during handoffs. One solution is to predict the trajectory of mobile terminals so as to perform bandwidth reservation in advance. With the vision that future mobile devices are likely equipped with reasonably accurate positioning capability, we propose a novel mobility prediction technique that incorporates both mobile positioning information and road topology knowledge. We then develop an adaptive bandwidth reservation scheme that dynamically adjusts the reservation at each base station according to both incoming and outgoing hand-off predictions generated using our mobility prediction technique. We evaluate the performance of the scheme via simulations, along with six other schemes for comparison purposes. Results agree with intuition that schemes which incorporate more knowledge are able to achieve better reservation efficiency. Our scheme is shown to achieve the best efficiency among all realizable schemes simulated.