ODE (Object Database and Environment): the language and the data model
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Asynchronous transfer mode: solution for broadband ISDN
Asynchronous transfer mode: solution for broadband ISDN
Integrated Services Digital Networks
Integrated Services Digital Networks
Mobile Cellular Telecommunications Systems
Mobile Cellular Telecommunications Systems
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In a wireless system the network logically rearranges itselfrapidly whenever terminals move from cell to cell.This ability to adapt itself to changing locations of its terminals adds a new layer of complexity to wireless control software.With ever increasing demand for more capacity and theaddition of new service features, many limitations and bottlenecks in the underlying network infrastructure are uncovered.While distributed architectures provide a method for increasingprocessing capacity, they also introduce concerns regardingreliability, communication latency and cost.In this paper we have attempted to combine the significantcharacteristics of both fixed and distributed architectures in a single system. Specifically, we present the design of a wireless hubprocessor, based on a communications oriented active memory technology, and illustrate how the procedures for mobility management, resource management and call processing map on to such a parallel architecture.A key attribute of the architecture is that it scales in processing capacity and size, while maintaining a common locusof control for administration, maintenance and reliability.Finally, we present an example of a navigation application to validate the architecture. This example shows how a roving computer or PDA connected to a global positioning system and having a wireless communication link can deal with a low bandwidth link to a server. The server provides user-tailored map data. An active memory architecture not only provides the server with a scalable architecturebut also aids the client.