TRAFFIC MODEL AND PERFORMANCE ANALYSIS FOR CELLULAR MOBILE RADIO TELEPHONE SYSTEMS WITH PRIORITIZED AND NON-PRIORITIZED HANDOFF PROCEDURES

摘要

A traffic model and analysis for cellular mobile radio telephone systems with handoff is described. Three schemes for call traffic handling are considered. One is non-prioritized and two are priority oriented. Fixed channel assignment is considered. In the non-prioritized scheme the base stations make no distinction between new call attempts and handoff attempts. Attempts which find all channels occupied are cleared. In the first priority scheme considered, a fixed number of channels in each cell are reserved exclusively for handoff calls. The second priority scheme employs a similar channel assignment strategy but additionally, queueing of handoff attempts is allowed. Appropriate analytical models and criteria are developed and used to derive performance characteristics. These show, for example, blocking probability, forced termination probability, and fraction of new calls not completed, as functions of pertinent system parameters. General formulas are given and specific numerical results for nominal system parameters are presented.