1 Virtualization for Support of Multiple Experiments on the ORBIT Radio Grid Testbed Ivan Seskar WINLAB, Rutgers University

2 GRID Virtualization Support concurrent experiments Support both short-term and long-term service experiments Allow fine-grained control over radio parameters and topology Combination of methods  Partitioning a node in Frequency domain (FDMA)  Partitioning a node in Time domain (TDMA)  Partitioning nodes by using “spatial” separation (SDMA?)  Combination of the above

3 Spatial Virtualization Virtual console support (Xen with 4 instances) Full isolation on wired side (VLAN) New resource allocation/management service needed for propper isolation on wireless side Console 1 Console 4Console 3 Console 2 Slice 1 Slice 4Slice 3 Slice 2

4 “Logical Virtualization” - VMAC Virtual Access Point 1 Essid:1 Exp. 1 Exp. 2 Essid:2 Ch. y Access Point Essid:1 Exp. 1 Exp. 2 Ch. y Access Point Essid:2 Ch. x Virtual Access Point 2 AP is shared among experiments Fixed topology Clients can’t be shared

5 Logical Virtualization – VMAC (contd.)

6 “Frequency Division” Two (multiple) concurrent experiments by using two (multiple) interfaces UML for node virtualization Frequency coordination service needed Exp. 1 Exp. 2 Exp. 1

7 “Frequency Division” (contd.)

8

9 Planet Lab Integration PlanetLab (VICI) Node Orbit Nodes sliver GRE PL-Orbit Proxy

10 Planet Lab Integration (contd.) PlanetLab (VINI) Nodes Orbit Nodes GRE Orbit Gateway GRE AP1 AP2

11 Conclusions “Bulletproof” solution need to address: Resource management issues  Local (on the node)  Global (across the grid)  Network wide Resource availability Access control (for all support services) Internetwork/Gateway/Proxy functions for both data and control paths Similarities with cognitive radio challenges