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By Daniel Collins, Clint Smith
Real-world guideline within the layout and deployment of 3G networks Pin down the technical information that make 3G instant networking really paintings. In 3G instant Networks, specialists Clint Smith and Daniel Collins dissect severe problems with compatibility, internetworking, and voice/data convergence, giving you in-depth causes of the way key criteria and protocols intersect and interconnect. This consultant digs into the gritty info of daily community operations, supplying you with an opportunity to appreciate the problems provider services will event in making the changeover from second iteration structures (CDMS etc.) to 2.5 iteration structures like WAP and aspect and at last to complete throttle 3G networks. It describes key criteria, digs deep into the center of suitable community protocols, and info the complete diversity of compatibility matters among the USA (CDMA 2000) and ecu (WCDMA) models of the normal. lots of name circulate diagrams convey you precisely how the applied sciences paintings.
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Table 2-1 represents the popular 1G wireless mobility service offerings that have been deployed. As mentioned previously, the two most prolific 1G systems deployed in the world are AMPS and TACS. All of the 1G systems shown in the table utilize a Frequency Division Multiple Access (FDMA) scheme for radio system access. However, the specific channel bandwidth that each use is slightly different, as is the typical spectrum allocations for each of the services. The channel bandwidths are as follows: ■ AMPS is the cellular standard that was developed for use in North America.
These systems have been extremely successful and many of them are still in service offering 1G services only. 1G systems, however, suffer from a number of difficulties. Some of those difficulties were addressed by additional technology added to the network Chapter 2 30 and some of the difficulties have required the implementation of 2G technology. The biggest problem that led to the introduction of 2G technology was the fact that the 1G systems had limited system capacity. This became a serious issue as the popularity of mobile communications grew to a level that far exceeded anyone’s expectations.
The increased radio traffic enables more users in a geographic service area than with the MTS or IMTS systems. Cellular radio was a logical progression in the quest to provide additional radio capacity for a geographic area. The cellular system, as it is known today, has its primary roots in the MTS and the IMTS. Both MTS and IMTS are similar to cellular with the exception that no handoff takes place with these networks. Cellular systems operate on the principal of frequency reuse. Frequency reuse in a cellular market enables a cellular operator the ability to offer higher radio traffic capacity.