Investigators at Swinburne University publish new data on vehicle technology.(Report)

"The IEEE 802.16 standard is a promising technology for the fourth-generation mobile networks and is being actively promoted by the Worldwide Interoperability for Microwave Access (WiMAX) Forum: an industry-led consortium. Among the various service classes supported in the standard, best-effort service is expected to be the major service class subscribed to by users due to its operational simplicity and lower charging rate compared with other service classes," researchers in Hawthorn, Australia report.

"In this paper, we investigate the throughput and packet-access-delay performance of best-effort service using the contention-based bandwidth request mechanism in a saturated IEEE 802.16 network. In particular, we develop a simple fixed-point analysis to approximate the failure probability of a bandwidth request and derive analytical expressions for network throughput and packet access delay. Furthermore, the uniqueness of the fixed point is established. The accuracy of the analytical model is validated by comparison with simulation over a wide range of operating conditions. The implications of various different parameter configurations on the system performance are investigated using the analytical model," wrote H.L. Vu and colleagues, Swinburne University.

The researchers concluded: "The utility of the model is further demonstrated by finding the maximum achievable throughput and obtaining its corresponding optimal initial contention window."

Vu and colleagues published their study in IEEE Transactions on Vehicular Technology (Performance Analysis of Best-Effort Service in Saturated IEEE 802.16 Networks. IEEE Transactions on Vehicular Technology, 2010;59(1):460-472).

For additional information, contact H.L. Vu, Swinburne University Technol, Fac Informat & Commun Technol, Center Adv Internet Architectures, Hawthorn, Vic 3122, Australia.

Publisher contact information for the journal IEEE Transactions on Vehicular Technology is: IEEE-Institute Electrical Electronics Engineers Inc., 445 Hoes Lane, Piscataway, NJ 08855-4141, USA.

Keywords: City:Hawthorn, Country:Australia, Bandwidth, Electronics, Microwaves, Mobile Network, Networks, Technology, Vehicular Technology

This article was prepared by Journal of Transportation editors from staff and other reports. Copyright 2010, Journal of Transportation via VerticalNews.com.