By Andrzej Jajszczyk
The final reference on instant technology?now up-to-date and revised
Fully up-to-date to include the newest advancements and criteria within the box, A consultant to the instant Engineering physique of data, moment Edition offers execs with a one-stop connection with every thing they should layout, enforce, function, safe, and troubleshoot instant networks.
Written through a bunch of overseas specialists, the publication deals an unrivaled breadth of insurance and a different concentrate on real-world engineering matters. The authors draw upon vast adventure in all components of the expertise to discover issues with confirmed useful purposes, highlighting rising components corresponding to long-term Evolution (LTE) in instant networks. the recent version is carefully revised for readability, studies instant engineering basics, and contours a variety of references for additional examine.
Based at the components of workmanship coated within the IEEE instant communique Engineering applied sciences (WCET) examination, this publication explains:
- Wireless entry applied sciences, together with the newest in cellular mobile technology
- Core community and repair structure, together with very important protocols and solutions
- Network administration and defense, from operations approach versions to key protection issues
- Radio engineering and antennas, with specifics on radio frequency propagation and instant hyperlink design
- Facilities infrastructure, from lightning safeguard to surveillance systems
With this relied on reference at their facet, instant practitioners gets in control on advances and top practices within the box and obtain the typical technical language and instruments wanted for operating in several components of the world.Content:
Chapter 1 instant entry applied sciences (pages 1–74):
Chapter 2 community and repair structure (pages 75–134):
Chapter three community administration and defense (pages 135–172):
Chapter four Radio Engineering and Antennas (pages 173–217):
Chapter five amenities Infrastructure (pages 219–245):
Chapter 6 Agreements, criteria, guidelines, and laws (pages 247–264):
Chapter 7 basic wisdom (pages 265–282):
Read or Download A Guide to the Wireless Engineering Body of Knowledge (WEBOK), Second Edition PDF
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Additional info for A Guide to the Wireless Engineering Body of Knowledge (WEBOK), Second Edition
There are commonly two types of hand-off; soft hand-off and hard hand-off. Soft hand-off is also referred to as a "make before break" hand-off and hard hand-off is known as a "break before make" hand-off. CDMA based technologies use a soft hand-off, which indicates that the MS is in communication with multiple base stations simultaneously, all with identical frequency assignments. This type of hand-off provides diversity on both the forward and reverse links at the boundaries between base stations.
To achieve this, it uses methods known from GSM/EDGE standards, including link adaptation and the HARQ (Hybrid Automatic Repeat reQuest) retransmission algorithm. In addition, HSDPA exploits a new dimension of diversity that has not been exploited by other 3GPP systems: the multi-user diversity that takes advantage of the multiplicity of users to optimize the use of radio resources. This multi-user diversity is extracted using a fast scheduling algorithm, built in Node B. This scheduler selects (every 2 ms) the most appropriate MS (or user equipment, UE) to which data should be sent.
Recent years have seen explosive growth in wireless traffic, particularly given the increasingly mobile world, and have witnessed a proliferation of global deployments to provide highspeed wireless connectivity, communication, and content. 2 Design Goals and Technology Elements It is intuitively appealing to think of a wireless access technology standard as one that has certain design attributes, in terms of: • Connectivity, access; • Mobility, coverage, roaming; • Throughput, latency, performance, data symmetry; • Efficiency; and • Universality (technology availability, global ecosystem, user roaming).