By Harvey Lehpamer
This sensible new source grants a complete figuring out of the layout and deployment of transmission networks for instant purposes. From rules and layout, to gear procurement, undertaking administration, checking out, and operation, it's a pragmatic, hands-on engineering consultant with quite a few real-life examples of turn-key operations within the instant networking undefined. This e-book, written for either technical and non-technical execs, is helping you take care of the prices and problems considering establishing the neighborhood entry with applied sciences which are nonetheless within the evolutionary degree.
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Additional resources for Transmission Systems Design Handbook for Wireless Networks
Example text
This opens up the potential for one or some of those packets to be lost or corrupted during the data transmission over the radio link. The GPRS standards recognize this inherent feature of wireless packet technologies and incorporate data integrity and retransmission strategies. However, the result is that potential transit delays can occur. Because of this, applications requiring broadcast-quality video may well be implemented using high-speed circuit-switched data (HSCSD). HSCSD is simply a circuit-switched data call in which a single user can take over up to four separate channels at the same time.
The enormous growth, experienced by todays mobile operators and service providers, has been achieved predominantly by voice services. With the arrival of 3G, initially in the form of packet data capabilities for existing networks, and subsequently by full 3G capabilities over new broadband wireless systems, this is set to change. Looking at the mass market in this way, it is possible to visualize discrete market sectors evolving out of a once undifferentiated whole in the following ways: • Basic voice services for the majority of the population will continue to be the basic communications requirement, and voice is continuing to grow at a rate of approximately 5% a year.
The idea of CDMA2000 3x (3xRTT) was recently abandoned in favor of the new and different approach. The first phase of CDMA2000 next-generation technology, called 1xRTT, has a data-only option, called 1xRTT Evolution-Data Only, for example. Called 1xEV-DO for short, this is the recently standardized CDMA technology based on Qualcomms high data rate (HDR) and adopted by top-tier equipment manufacturers at the end of 2000. 25 Mbps for downloading data and 300 Kbps for uploads when users are mobile and moving at vehicular speeds.