Space Versus Time Separation for Wireless Virtualization on an Indoor Grid

The decreasing cost of wireless hardware and ever increasing number of wireless testbeds has led to a shift in the protocol evaluation paradigm from simulations towards emulation. In addition, with a large number of users demanding experimental resources and lack of space and time for deploying more hardware, fair resource sharing among independent co-existing experiments is important. The paper studies the proposed approaches to wireless virtualization with a focus on schemes conserving wireless channels rather than nodes. The detailed comparison reveals that while experiments sharing a channel by space separation achieve better efficiency than those relying on time separation of a channel, the isolation between experiments in both cases is comparable.