Abstract
Fourth Generation (4G) wireless networking may involve gigabit per second transmission based on a mesh network architecture. These networks may use Extremely High frequency or optical bands. The network is formed in an ad hoc manner. For this directional mesh network, we present a new restoration algorithm for broadband wireless optical networks. A special restoration strategy, called local recovery for local failure is applied in the proposed algorithm. Specifically, each node initializes the recovery process independently of other nodes in the network when the failed link is local to the node. This algorithm is a hybrid restoration scheme, consisting of a route pre-planning phase and a real-time rerouting phase. Transient link/node failure, lasting only a short duration is typical in wireless communications and specially handled in our algorithm. We explore the response times of the proposed restoration algorithm. Simulation results over typical network structures show that we could achieve a full recovery of single-link failure, nearly 100% recovery of single-node failure, as well as around 99.5% recovery of double-link failure.
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