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Proceedings Paper

Adaptive streaming protocol for mobile-augmented-reality-based concurrent engineering
Author(s): Tino Pyssysalo
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Paper Abstract

In this paper we describe a new adaptive streaming protocol for mobile augmented reality applications. Mobile augmented reality is typically a multi-user environment, where users interact with each other using shared computer-generated virtual objects. One application area of mobile augmented reality is concurrent design and engineering, where the consistency of shared objects is maintained with a real-time streaming protocol. The protocol adapts the stream of update messages according to the wireless link quality. Adaptation means the adjusting of transmission speed to maximize reliability and to minimize packet delivery latencies and their variation, jitter. Conventional streaming protocols use an end-to-end feedback channel to transmit network quality parameters used in adaptation. However, this causes unnecessary delays and decrease the reliability, because feedback messages have to be transmitted over a wireless media. We present a new approach, in which the adaptation is based on the link quality parameters, stored in a base station. No high protocol layer wireless feedback channel is required, which makes the adaptation fast. We justify the feasibility of our protocol by comparing its performance with the most common transport-layer streaming protocols and show that faster adaptation reduces the number of lost packets and jitter in the network.

Paper Details

Date Published: 3 May 2000
PDF: 11 pages
Proc. SPIE 3957, Stereoscopic Displays and Virtual Reality Systems VII, (3 May 2000); doi: 10.1117/12.384468
Show Author Affiliations
Tino Pyssysalo, Univ. of Oulu (Finland)

Published in SPIE Proceedings Vol. 3957:
Stereoscopic Displays and Virtual Reality Systems VII
John O. Merritt; Mark T. Bolas; Stephen A. Benton; Andrew J. Woods; Mark T. Bolas, Editor(s)

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