Control and quality-of-service provisioning in high-speed microcellular networks
Anthony S. Acampora, M. Naghshineh · IEEE Personal Communications · 1994
this article, we propose and study distributed control methodologies for high-speed microcellular networks based on a hierarchical grouping of backbone and wireless network resources. With our approach, a number of adjacent cells are grouped into a cell-cluster that is used for call setup and control of the radio links, and all access points in a cell-cluster belong to the same backbone network connection tree, to be used for call setup and control of the backbone portion of wireless connections. Distributed Control of The Backbone Network Since, in a micro/picocellular network, the interface of a wireless connection to its backbone changes frequently as a result of hand-off events, network routing functions must frequently be invoked. The virtual connection tree concept as described in [10-12] reduces the call setup and routing load on the network call processor in such a way that a large number of mobile/wireless connections can be supported. A virtual connection tree is a collection of cellular base stations and wired network switching nodes and links. The root of the tree is a fixed switching node of the wired network and the leaves of the tree are mobile access points or base stations. For each mobile connection, the connection tree provides a set of virtual connections (in each direction), each providing a path from the root to one leaf. To complete a mobile connection in the backbone network, a fixed virtual connection is created for that connection from the tree's root node back to either a wired network port (if the connection is to a fixed port) or to the root of some other connection tree (if the connection is to another mobile user). Figure 1 illustrates a virtual connection tree in a high-speed packet-switched network that supports mobile cellular radio c...