Redundancy in the backhaul connection can be achieved by providing
direct backhaul connections to two or more nodes.
Mesh BS
Figure 15.1 Illustration of a wireless Mesh network
484 Chapter 15
?– Peer-to-peer communication Mesh networks allow for communication, direct
or indirect, between two SSs, without having to send the traffic through the BS.
This results in efficient use of the spectrum.
There are several downsides to Mesh networks. Routing data traffic through multiple
hops can degrade the cumulative latency and jitter experienced by the data traffic.
Additionally, Mesh networks may not be very scalable as the complexity of the control
mechanism and the mesh management traffic may grow significantly as the size of the
network grows. Finally, the controllers of Mesh networks are also significantly more
complex and costly than that of PMP networks.
There are, in general, two categories of Mesh networks: physical and logical mesh.
Physical mesh consists of nodes using highly directional antenna such that physical
links are created between any two nodes. At all times, a physical link connects only
two nodes and a node would use such a physical link to communicate with its neighbor.
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