A multibeam medium access scheme for multiple services in wireless cellular communications

Multibeam cellular communication systems in which multiple services are of interest are considered. An architecture of channel sharing and medium access which can support multiple services with different CIR requirements is proposed. Dynamic channel assignment (DCA) is used to improve channel reuse and to allocate different CIR quality channels within a channel layout which incorporates several frequency reuse patterns. Channels with higher CIR levels are primarily for services that require higher quality communication links, such as data calls, and channels with lower CIR levels are only for services that require lower quality links, such as voice calls. Services that require lower quality links can also access channels with higher CIR levels if channels of lower quality groups are not available. We develop a tractable analytical model for the system using multidimensional birth-death processes with an appropriate state characterization. Theoretical traffic performance characteristics such as blocking probability, forced termination probability and carried traffic are determined.