Advanced Mobile Phone Service: Control Architecture

Abstract

The cellular concept used in the Advanced Mobile Phone Service (amps) system to achieve spectrum efficiency requires a complex and flexible distributed system control architecture. Three major subsystems serve as the control elements: the mobile unit, the cell site, and the switching office. System control functions are partitioned among these subsystems to handle the following amps control challenges: interfacing with the nationwide switched telephone network, dialing from mobile units, supervising calls from mobile subscribers in the presence of noise and co‐channel interference, performing call setup functions including paging and access, and locating and handing off mobiles between cell sites. This paper explains the techniques used to achieve the control functions of the three major subsystems and the ways they in turn participate in control of the total amps system.

Performance modeling of multihop network subject to uniform and nonuniform geometric traffic

“…Each packet within is assigned the state probability . After sorting the packets in by descending age order, we combine them with Tx buffer states (buffers of size ranging from 0 to , where each size represents a possible outcome) and update the buffer and packet probabilities following (14) and (15). While repeating this procedure for each combination , we update .…”

“…if else (15) where the summation over represents the summation over all (combination of incoming packets) and (subset of incoming packets switched to ) that contains packets of age , of destination , and of position in the ordered set (decreasing age order). Note that if .…”

ARIadne – An Explanation Model for Digital Artefacts

“…The relevant basic principles of this technological architecture established in the late 1970s (e.g. described by Young (1979) and Fluhr and Porter (1979)) 20 still apply in the modern mobile phone networks using GSM, UMTS, LTE or 5G.…”