The mesh networking solution, which is part of the Cisco unified wireless network solution, enables two or more Cisco Aironet lightweight mesh access points (hereafter called mesh access points) to communicate with each other over one or more wireless hops to join multiple LANs or to extend 802.11b wireless coverage. Cisco mesh access points are configured, monitored, and operated from and through any Cisco wireless LAN controller that is deployed in the mesh networking solution.
Supported mesh networking solution deployments are of one of three general types:
Point-to-point deployment
Point-to-multipoint deployment
Mesh deployment
Following URL for Mesh Networking Solution Deployments may help you for detailed information on each of these deployment types
http://www.cisco.com/en/US/docs/wireless/access_point/mesh/4.0/deployment/guide/overview.html#wp1041408