EXPLORING THE USE OF LOCAL CONSISTENCY MEASURES AS THRESHOLDS FOR DEAD RECKONING UPDATE PACKET GENERATION

Authors:
Dave Roberts;Damien Marshall;Rob Aspin;Seamus McLoone;Declan Delaney;Tomas Ward
Affiliations:
Centre for Virtual Environments Business House, University of Salford, Salford, M5 4WT, UK;Centre for Virtual Environments Business House, University of Salford, Salford, M5 4WT, UK;Centre for Virtual Environments Business House, University of Salford, Salford, M5 4WT, UK;National University of Ireland Maynooth Maynooth, Co. Kildare, Ireland;National University of Ireland Maynooth Maynooth, Co. Kildare, Ireland;National University of Ireland Maynooth Maynooth, Co. Kildare, Ireland
Venue:
DS-RT '05 Proceedings of the 9th IEEE International Symposium on Distributed Simulation and Real-Time Applications
Year:
2005

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Abstract

Human-to-human interaction across distributed applications requires that sufficient consistency be maintained among participants in the face of network characteristics such as latency and limited bandwidth. Techniques and approaches for reducing bandwidth usage can minimise network delays by reducing the network traffic and therefore better exploiting available bandwidth. However, these approaches induce inconsistencies within the level of human perception. Dead reckoning is a well-known technique for reducing the number of update packets transmitted between participating nodes. It employs a distance threshold for deciding when to generate update packets. This paper questions the use of such a distance threshold in the context of absolute consistency and it highlights a major drawback with such a technique. An alternative threshold criterion based on time and distance is examined and it is compared to the distance only threshold. A drawback with this proposed technique is also identified and a hybrid threshold criterion is then proposed. However, the trade-off between spatial and temporal inconsistency remains.