By Harvey Lehpamer
This functional new source offers a entire figuring out of the layout and deployment of transmission networks for instant purposes. From rules and layout, to apparatus procurement, undertaking administration, trying out, and operation, it's a pragmatic, hands-on engineering advisor with a number of real-life examples of turn-key operations within the instant networking undefined. This publication, written for either technical and non-technical pros, is helping you take care of the prices and problems fascinated with constructing the neighborhood entry with applied sciences which are nonetheless within the evolutionary degree.
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Additional info for Transmission Systems Design Handbook for Wireless Networks
Example text
Typical cellular reuse (pre-CDMA, that is) is easily rationalized by considering an idealized system. Assuming that propagation is uniform and that cell boundaries are at the equisignal points, then a planar service area is optimally covered by the classical hexagonal array of cells. Using seven sets of channels, one set in each cell, this unit is then replicated over the service area. While real systems do not ever look like these idealized hexagonal tilings of a plane, the seven-way reuse is typical of that achieved in practice.
In addition, 3G radio access must provide full-area coverage (same as 2G voice service), high-peak bit-rate services (384-Kbps full-area coverage, 2-Mbps local coverage) and any kind of service mix. Finally, 3G radio access must use the radio spectrum and network resources in a cost-effective fashion. To succeed, the 3G standards must facilitate efficient migration from 2G radio access. The introduction of multimedia into mobile communication will proceed gradually over time. Thus, a step-by-step migration plan must be developed that begins with the state of present-day 2G systems.
So, the subscriber potentially has an option of either SIM card mobility or terminal mobility across multiple networks. Today, using General Packet Radio Services (GPRS), packet access can also be integrated into GSM. GPRS is a new nonvoice value-added service that allows information to be sent and received across a mobile telephone network. 25 and Internet Protocol (IP) networks. GPRS involves overlaying a packet-based air interface on the existing circuit-switched GSM network. This gives the user an option to use a packet-based data service.