A traffic model for GSM/GPRS, the hybrid radio resource allocation (HRRA) algorithm is evaluated. A dedicated number of GPRS channels plus idle periods between GSM voice calls are used for GPRS data packet transfers. A simulator was developed in order to evaluate the HRRA algorithm, which provides a reasonable forecast on the voice blocking probability and on packet delay for a single cell system. Since the major issue is the correct resource allocation, results are shown for the influence of some choices and assumptions on the overall performance. As expected, blocking probability can reach very high values if the number of dedicated channels increases too much. For the specific case of 4 carries and traffic of 20 Erl, 4 channels dedicated to GPRS still enable an affordable blocking probability, leading to a mean packet delay of 15 s. The results can be used to illustrate the fundamental options that need to be taken by an operator, when implementing GPRS.
[1]
Michel Daoud Yacoub,et al.
Foundations of Mobile Radio Engineering
,
1993
.
[2]
B. Achiriloaie,et al.
VI REFERENCES
,
1961
.
[3]
Michael Meyer,et al.
Wireless Internet access based on GPRS
,
2000,
IEEE Wirel. Commun..
[4]
Stephen S. Rappaport,et al.
Traffic Model and Performance Analysis for Cellular Mobile Radio Telephone Systems with Prioritized and Nonprioritized Handoff Procedures - Version 2a
,
2000
.
[5]
Stephen S. Rappaport,et al.
Traffic model and performance analysis for cellular mobile radio telephone systems with prioritized and nonprioritized handoff procedures
,
1986,
IEEE Transactions on Vehicular Technology.