Wireless Mesh Network (WMN) is emerging as key
technology for the next generation network due to its features
like providing broadband access with low cost and
applicability to versatile areas. WMN's are basically multi-hop
networks, in which data is forwarded to backbone through a
gateway from the client nodes and vice versa. The client nodes
may be wired or wireless and may be mobile with varying
client network architecture. Gateway has fixed bandwidth to
be shared by all the clients for communication. It causes
reduction in per client throughput as the number of clients is
increasing and thus may lead to overall performance
degradation. Associating clients to gateway is a crucial point in
deciding performance as is gateway placement, routing and
scheduling at the gateway. Associating nodes to a single
nearest gateway causes reduction in capacity of WMN and
unfairness amongst the nodes. Clients can be associated to
multiple gateways. WMN are dynamically self-organizing and
self-healing and this imposes even more responsibility on
gateways. Having multiple gateways in clustered WMN can
improve performance significantly