IEEE 802.16 protocol allows for creation
of such wireless Mesh networks, as illustrated in Figure 15.1. With these capabilities,
Mesh networks offer several benefits that cannot be easily realized by PMP networks.
?– Cost-effective network expansion With each SS capable of communicating
with and relaying the traffic of other SSs, expansion of a network beyond the range
of a BS could be done by just deploying more SSs beyond the range. As long as such
an SS can communicate directly or indirectly (through other SSs) with another SS
within the range of the BS, the network can be expanded without having to deploy
additional costly BSs.
?– Increased network capacity/spectral efficiency Two or more pairs of nodes
not sharing the same channel are allowed to communicate with each other simultaneously.
This results in an increased network capacity. Additionally, increased
spectral efficiency can be achieved when traffic between a BS and distant SS is
routed through an intermediate SS instead of by means of direct communication.
?– Redundancy and resiliency Mesh networks allow for multiple redundant
paths to route traffic between two nodes, which in turn provide resiliency against
failures.
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