Alternately, each access point may be served
by multiple E-LAN services, with each E-LAN service dedicated to a specific purpose.
For example, each E-LAN service may be dedicated to a particular WISP provider,
enabling multiple providers to share the same wireless infrastructure. In a different
deployment scenario, each E-LAN may serve only a subset of access points, enabling
segmentation of the network.
Optical Wireless Mesh Networks 259
Ongoing Developments
The ongoing evolution of free space optics can be grouped in two fronts, those driven by
prevailing commercial interests and those that are at the forefront of the cutting edge
of the technology, driven by military interests.
The commercial front of FSO technology is primarily limited to a set of vendors introducing
slightly higher-capacity and lower-cost products, each trying to differentiate
from the other. Since commercially available technology already achieves gigabit per
second and more bandwidth, meeting or exceeding bandwidth needs of most of the applications,
developments in the commercial front have mostly been on cost reduction
rather than performance enhancements.
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