By IEEE Communications Society
The final reference publication for execs within the instant undefined
the data offered during this booklet displays the evolution of instant applied sciences, their effect at the career, and the industry's regularly approved top practices. geared up into seven major components of workmanship, A advisor to the instant Engineering physique of data (WEBOK) complements readers' knowing of:
- instant entry applied sciences
- community and repair structure
- community administration and protection
- Radio frequency engineering, propagation,and antennas
- amenities infrastructure
- Agreements, criteria, guidelines, and rules
- instant engineering basics
Complemented with numerous references and recommendations for extra analyzing, the WEBOK is an crucial source for someone operating within the instant undefined.
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Additional info for A Guide to the Wireless Engineering Body of Knowledge (WEBOK)
2 3GPP2 Radio Access Standards Evolution Figure 1-17 shows a high-level view of the evolution of 3GPP2 radio-access technology. 1 cdmaOne and cdma2000-1X cdmaOne was the first commercial CDMA network based on ANSI-95 standards. The cdma2000-1X doubled the spectral efficiency, as shown in Figure 1-18. The spectral efficiency here is defined by the sector capacity (in Mb/s) for both forward link (FL, base-to-mobile station) and reverse link (FU, mobileto-base station) divided by the total required bandwidth (in MHz).
To address the concern for efficiency, another service was designed-GPRS (General Packet Radio Services). The GPRS is a set of GSM bearer services that provides packet-mode transmission and interworking with external packet data networks. The GPRS allows a subscriber to send and receive data in an end-to-end packet-transfer mode without utilizing network resources in circuit-switched mode. 60. To accommodate sporadic transfers of large amounts of data, GPRS encompasses allocation and release mechanisms that optimize use of the radio resources.
24 A Guide to the Wireless Engineering Body of Knowledge Introduction of Packet Mode in GSM Data services were already defined in the first phase of GSM. These were circuit-switched data services that yielded the allocation of a TCH (one TDMA time slot). 6 kb/s. Therefore, it was highly desirable to increase the throughput on the radio interface. One way to achieve this for a given call is to utilize more than one TDMA time slot on the radio interface. Such a feature has been standardized as HSCSD (high-speed circuit-switched data).
A Guide to the Wireless Engineering Body of Knowledge (WEBOK) by IEEE Communications Society