UCLA Wireless Adaptive Mobile Information System (WAMIS)

Computer-Aided Design of High-Performance Wireless Network Systems

( September 1993 - August 1997 )

Principal Investigators: Rajeev Jain and Leonard Kleinrock

OUTLINE:

OVERVIEW:

This project will develop techniques for the design of wireless networks that are adaptable to a variety of application scenarios covering different transmission environments, varying network configurations, and a range of user services-data, voice, and image. The focus is on: a) CAD framework for simulation of all network subsystems such as radios, network control algorithms and multi-media compression algorithms; b) network control algorithms for a variety of functions relevant to wireless multi-media such as power control, bandwidth allocation, and code assignment; c) compression algorithms for image and speech that adapt to channel conditions; and d) software and hardware implementation of various algorithms to build an adaptable and wireless network using spread-spectrum CDMA radios.

A key challenge in this project is to provide the design technology for the implementation of wireless networking system for different application scenarios, rather then developing a point solution.

OBJECTIVE:

The objective is to deliver to the ARPA community design tools, high speed signal processors, network control algorithms and image compression techniques to enable the implementation of dynamically reconfigurable wireless computer networks that demonstrate rapid deployment of wireless multimedia services - data, speech and video. The modulation, compression and network configuration will be dynamically adaptable to the available transmission bandwidth and channel characteristics to maximize the number of users connected to each other and to optimize the information quality they can exchange in the absence of any pre-installed infrastructure of tethered base stations, cellular networks or wireline networks. The CAD system will allow design, development and implementation of customized wireless networks.

APPROACH:

The goal of developing a comprehensive CAD framework, suitable for the design of WAMIS networks, will be achieved by leveraging and expanding our ongoing research efforts in communications CAD, transceiver circuit design, parallel simulation, architecture synthesis, physical design, and system algorithms for network control, image coding and speech coding.

Several tools will be integrated in the framework and applied to efficient analysis and development of the system algorithms for WAMIS as well as to their physical implementation using parallel simulation, DSP synthesis, performance-driven physical design and high speed signal processors. In addition to allowing top-down design for each subsystem in the WAMIS network, the CAD framework will provide tools to address critical system-level issues including signal communication and synchronization between subsystems.

Algorithms will be developed both for power control in a mobile, multihop, multichannel packet radio environment, and for routing, dynamic bandwidth allocation and fault tolerance to provide graceful degradation. Each algorithm will be analyzed, simulated, and deployed in a wireless network demonstrator designed with the CAD system to exercise and test the algorithms.

TECHNOLOGY TRANSITION:

The CAD techniques will be made available for use on other ARPA sponsored projects for hand-held multimedia terminal design. The CAD techniques will also be applied to encapsulate know-how of these terminals so that their application in the proposed wireless computing networks can be evaluated.

REPORTS:

KEY PERSONNEL:

Principal Investigators

Co-Principal Investigators

Administrative Assistants/Analysts

Research Engineers

Programmer Analysts

Research Assistants

SPONSOR:


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ramsey@cs.ucla.edu