|Call for Papers|
Games Ad Hoc Networks Play
This talk takes a critical look at the role of game theory in ad hoc networking. We consider game-theoretic formulations for modeling contention resolution, rate and power control, network formation, and network security. Results on the existence of equilibria, the complexity of finding them, and their structural properties will be covered. We discuss shortcomings of existing models, including assumptions on computational capability of the network nodes, the information available to each node, and the choice of utility functions. The talk will conclude with ideas to address these shortcomings, and open problems in the area.
Networking Devices over TV White Spaces
On November 4th, 2008 the FCC made a historic decision to allow unlicensed devices (similar to Wi-Fi devices) to operate in the white spaces. These are portions of the spectrum which are unoccupied by their licensed incumbents, such as TV transmitter. Compared to the ISM bands where Wi-Fi operates, this portion of the spectrum has several desirable properties for robust data communications. However, to make efficient use of this spectrum in a way that is non-disruptive to incumbents, there are a number of challenges that must be handled. For example, an unused portion of the spectrum must be found, and it is likely that its availability will vary over time and location. To address such challenges, we have developed a hardware-software platform that includes a spectrum-aware Medium Access Control (MAC) protocol and algorithms to deal with spectrum fragmentation. In this talk, I will describe these solutions and present some open challenges in enabling high speed wireless connectivity in the TV bands.