Dynamic channel assignment schemes using vehicular mobility information and violation to the reuse pattern for highway microcellular systems

In this work, distributed dynamic channel assignment strategies with violation to the reuse pattern using vehicular mobility information for highway microcellular environments are proposed. It is shows that, when vehicular mobility information is included in the acquisition channel policy, the outage probability degradation because of the use of channels with one violation to the reuse pattern is negligible. Also, it is shown that, using different moving direction strategies it is possible to control the tradeoff between capacity and quality of service. The local packing algorithm (LP), was modified to allow the use of two different moving direction strategies: with violation to the reuse pattern, resulting the VDLP1 and VDLP2 algorithms. The characteristics of user mobility are considered and a free-flowing vehicular traffic is assumed. Simulation results show that the use of vehicular mobility information in the distributed dynamic channel algorithms with violation to the reuse pattern, produce a considerable increase in the system capacity at the expense of an insignificant degradation of the quality of service. For a grade of service (GOS) of 0.1, the VDLP1 and VDLP2 carry 4% and 1.5% more traffic than the maximum packing algorithm, respectively. For the same GOS, the VDLP1 and VDLP2 carry 68% and 64%; more traffic than the Bred channel assignment algorithm, respectively.