By William Webb
That includes constructing applied sciences, up to date marketplace forecasts, and present regulatory projects, this article goals to maintain the reader on the vanguard of rising items, companies and concerns affecting the sphere of instant neighborhood loop (WLL) expertise. the second one variation comprises new chapters on WLL deployment, the WLL marketplace, and a considerable evaluation of broadband applied sciences, in addition to new sections on prediction of consumer standards and the rising UMTS common.
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Extra info for Introduction to Wireless Local Loop: Broadband and Narrowband Systems (2nd Edition)
Sample text
The same is true for cable operators, who have particular problems with the return path due to their original network design, which will be The converging world of telephony, TV, and computers 19 expensive to overcome. A WLL operator providing relatively good voice and Internet access on a relatively low-cost base might provide a welltargeted service for many customers. Even better, in any particular country, not all types of operators will be present, and there may not be a demand for all services.
World GDP for the region where the prediction was made. If the analysts are right, the number of ADSL lines should rise to nearly 20 million by 2003. 5, by this period there is expected to be around 50 million WLL lines. Hence, the current predictions are that in terms of lines, WLL will have a higher penetration than ADSL. 3 Access via coax Cable operators have implemented what often is known as a tree-andbranch architecture. 4 is a schematic representation of such an architecture. 4 Fiber-optic core Tree-and-branch architecture.
In that case, the copper run to the subscribers premises is very short, typically less than 500m; hence, higher data rates can be supported. Using the most advanced technology proposed yet, it is suggested that VDSL could achieve data rates of up to around 50 Mbps, although that is still far from being proved. Current plans suggest 10 Mbps downstream and 64 Kbps on the return path. VDSL cannot be used in networks in which FTTC has not been implemented. xDSL will be expensive to implement, even though the local loop will stay relatively unchanged.