Device-to-device (D2D) communication that enables direct communication between nearby mobiles is an exciting and innovative feature of next-generation cellular networks. It will facilitate the interoperability between critical public safety networks and ubiquitous commercial networks based on e.g. LTE. How should we analyze and design such hybrid networks consisting of both cellular and ad hoc links? WNCG Profs.
When studying Social Networks, the public mind does not often consider the enormous impact the field of Electrical Engineering has on the development of these networks.
“Many tools that traditionally belonged to applied mathematics and electrical engineering have proven to be very useful in social networks,” WNCG Prof. Constantine Caramanis states.
Recent years have radically changed the way people socialize; in parts of the developed world that have good broadband and cellular penetration, the average person now spends more time on online social networks than on physical meetings with acquaintances outside their immediate family.
“We were socializing before social networks,” Prof. Sujay Sanghavi states. “But now we can automatically capture fine details of social interaction, such as when someone views a photo and how they share and interact with the image.”
The problem now is the issue of information overload.
Video has many applications in the battlefield environment. Different than consumer networks, in tactical video networks, data must be delivered within a strict time interval because it is being used for decision making. Consequently, mobile ad hoc networks require capabilities to support the combined control and communication features of tactical video networks. These capabilities can be incorporated into the concept of a network of systems (NoS).
Base station (BS) coordination is regarded as an effective approach to mitigate intercell interference. The idea is to allow multiple BSs to coordinate their transmit and receive strategies (e.g., beamforming, power control, and scheduling) by utilizing channel state information (CSI). A central concept in the implementation of BS coordination with low overheads is to form a cluster, defined as the set of BSs that a given user coordinates with. From the vantage of a user, only those BSs outside the cluster are sources of interference.
Due to the superposition and broadcast nature of the wireless medium, unmanaged interference results in diminishing data rates in wireless networks. With a recently developed network coding strategy, however, it was demonstrated that interference is no longer adverse in communication networks, provided that it can sagaciously be harnessed. This approach of exploiting interference has opened the possibility of better performance in the interference-limited communication regime than traditionally thought possible.
With advances in RF circuits, the era of operating cellular networks in millimeter wave (mmWave) bands is coming. The lightly licensed mmWave band offers the potential to solve the spectrum gridlock in current cellular networks. It is not clear, however, whether both high data rates and coverage in signal-to-noise-and-interference ratio (SINR) can be achieved in mmWave cellular networks; as the propagation conditions and hardware constraints become different, and prior microwave network models do not directly apply to mmWave systems.
Student Harpreet Dhillon and former visiting researcher Ralph Tanbourgi receive Best Student Paper Award in the 20th European Wireless Conference in Barcelona, Spain. Their paper was chosen from among 180 papers presented at the conference. Dhillon, advisded by Prof. Jeffrey Andrews, will join Virginia Tech this fall as an Assistant Professor.
The Defense Threat Reduction Agency (DTRA) recently awarded four UT Austin faculty $1 million for a study regarding effects and reparation efforts following WMD attacks on interdependent networks.