Chapter_5_-_Wireless_WAN.pdf - Wireless WANs Cellular Networks NES440 Wireless Networks NES440 Wireless Networks Copyright \u00a9 Dr Fahed H Awad 1 Cellular

Chapter_5_-_Wireless_WAN.pdf - Wireless WANs Cellular...

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NES440: Wireless Networks Copyright © Dr. Fahed H. Awad 1 Wireless WANs: Cellular Networks NES440 Wireless Networks
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Cellular Telephone Systems Cellular telephone systems were originally designed to provide voice communications services to/from mobile stations (MS) A MS can communicate to another MS or to a landline stationary station The cellular structure is designed such that: The service area is divided into small regions called “cells” Each cell has a base station (BS) that provides the first hop access for the MS Each BS is connected to a call switching office called the Mobile Switching Center (MSC) The MSC connects the BS with other BS’s and to the Public Switched Telephone Network (PSTN) The cellular service provider must be able to: Track and locate the MS within its coverage (or service) area Assign a channel to each call from or to the MS Maintain the call as the MS moves around Copyright © Dr. Fahed H. Awad 2 NES440: Wireless Networks
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Mobile Switching Center (MSC) Public Switched Telephone Network (PSTN), and the Internet Mobile Switching Center (MSC) Components of the Cellular Network Architecture Connects the cells to the wide area network Manages call setup (more later!) Handles mobility (more later!) MSC Wired Network Cell Covers a geographical region Base Station (BS) : analogous to the IEEE 802.11 AP Mobile Station (MS) : attaches to the network through the BS Air-interface : the physical and link layer protocols between the MS and the BS Copyright © Dr. Fahed H. Awad 3 NES440: Wireless Networks
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