Advanced Mobile Phone Service: Development Support Systems
01 January 1979
The Advanced Mobile Phone Service (AMPS) system is composed of four major elements: the Electronic Switching System, the data link, the cell site, and the mobile unit. In the Chicago Developmental System, the switching functions are performed by a No. 1 Electronic Switching System (ESS)1 in conjunction with a programmable controller (PROCON) residing in each of the cell sites. The data link equipment is an adjunct to ESS. It has its own processor and memory and runs autonomously. The mobile unit is controlled by a resident microprocessor. Thus, processing a mobile call involves four separate processors. Each of these must be tested individually and then as a system. Several laboratory test systems have been built to support the A M P S development. This paper describes those that have been or are being used for simulation, software debugging, integration testing, and data gathering. They are: (i) A Mobile Office Simulated Environment System (MOSES) that simulates the cell sites and mobile units for testing the ESS and data link software. (ii) A Maintenance and Traffic Simulator (MATS) that simulates cell site peripherals, mobile units, and mobile telephone users 201