Hi Reza,
As Michael said above, the Ruckus terminology for this kind of wirelessly extended network is "SmartMesh". It is very simple to set up and you can find an overview of the technology here:
http://www.ruckuswireless.com/technology/smartmeshAnd a nice feature sheet here:
http://c541678.r78.cf2.rackcdn.com/feature-sheets/fs-smartmesh.pdfSince you are deploying a large meshed network, it might be useful to consult the Best Practices guide:
http://c541678.r78.cf2.rackcdn.com/appnotes/bpg-wireless-mesh.pdfFurther info on specifically how to set it up can be found in the ZoneDirector user guide, but you might not even need to read it. Basically, all 200 AP's should be initially set up by connecting it to a wired network with the ZD. This allows the ZD to provision the AP's.
After that, SmartMesh simply happens
automatically. If a provisioned AP boots and cannot talk to the ZD via the wired network (e.g. no Ethernet plugged in), it will automatically search for nearby AP's to mesh with.
Some of the Ruckus documentation has not been updated to reflect the newer supported meshing configurations. Of notable interest is Ruckus now supports a notion of "eMesh AP", which allow a group of meshed AP's to be connected together with ethernet. When you do this, the AP's will use ethernet to backhaul between them, and allows most of the AP's in the eMesh to broadcast on different channels. This would increase the capacity of your meshed network.
@Michael: As feedback, it'd be great if the mesh best practices guide could be updated to reflect eMesh AP's and how to intelligently leverage this feature. This seems like a very useful way for an island of meshed AP's to work around the capacity decrease inherent with pure wireless meshing, but there doesn't seem like there's an official guide of how best to utilize this architecture.