The shadow cluster concept for resource allocation and call admission in ATM-based wireless networks
David A. Levine, Ian Fuat Akyildiz, M. Naghshineh · 1995
This paper describes the Shadow Cluster concept, a novel idea that can be used to improve the resource allocation and the call admission procedures in wire less networks.Shadow clusters can be used to allocate resources that need to be reserved for call hand-offs, and to determine if a new call should be admitted to a wireless network based on the call's requirements and local traffic conditions.The shadow cluster concept is targeted for ATM-based wireless networks with a micro/n.ano-cellulararchitecture, where service will be provided to users with very diverse requirements.In these n.etworks, and as a consequence of the small cell sizes, mobile users will typically experience a high number of cell hand-offs during their connections' lifetime.'With shadow clust.ers, the quality of service of mobile calls can be improved by reducing the number of dropped calls during hand-offs, and by disallowing the establishment of new calls that are highly likely to later result in a dropped call.The framework of a shadow cluster system is completely distributed, and can be viewed as a message system where a mobile terminal informs the base stations in the neighborhood about i.ts requirements, position, and movement parameters, so that the base stations project future demands, reserve resources accordingly, and admit onlv