I've worked a good deal on 802.11/WiFi networks, mainly related to MAC analysis and design. My current work is focussed around small cell networks more generally, especially Femtocell, mixed LTE/WiFi networks and unlicensed LTE. This includes algorithms for collision-free decentralised scheduling, scrambling code allocation, antenna tilt angle adjustment, energy management and scheduling/routing in mixed LTE/WiFi networks.
Optimisation and Constraint Satisfaction
My interest is in lightweight/highly-scalable distributed algorithms. I've worked for some time now on fully decentralised (no message-passing) algorithms for constraint satisfaction, which we have applied to collision-free scheduling, scrambling code allocation and channel allocation in wireless networks. I'm also working on generalised max-weight algorithms for optimisation and on privacy-enhanced algorithms.
This a relatively new area of interest. Current projects include methods for privacy verification e.g in online search, private recommender systems, network privacy as a service, traffic analysis attacks and defences for encrypted packet streams, fast search algorithms for detecting quasi-identifiers in large-scale data-sets and mathematical frameworks for privacy e.g. differential privacy. See also SCSS Privacy Page.
- Green Transport and Communication Networks (co-PI with Robert Shorten, Science Foundation Ireland grant € 3M, 2012-2017).
- Telecommunications Graduate Initiative, HEA PRLTI Cycle 5 funding for extending the Network Maths (co-PI, TGI is co-ordinated by Trinity College Dublin, 2011-2015)
- CONNECT Centre for Future Networks (co-Applicant, Science Foundation Ireland centre co-ordinated by TCD, 2015-2021)
- Royal Society Research Fellowship, 1995-2005
- An Investigation of the Benefits of Nonlinear Control for Variable Speed Wind Turbines (EPSRC Grant no. GR/L/36659, co-PI with W.E.Leithead, UK£114,000, 1997-2000).
- MAC - Multi-Agent Control: Probabilistic reasoning, optimal co-ordination, stability analysis and controller design for intelligent hybrid systems. A four year Research Training Network within the European Commission's 5th Framework (EU HPRN-CT-1999-00107, PI on € 200k share of overall € 1.2M grant, 2000-2004).
- Off-equilibrium: A new paradigm for divide & conquer identification of nonlinear systems (PI, UK EPSRC grant GR/R15863, £ 310000, 2001-2004)
- SFI Principal Investigator (co-PI with Robert Shorten, Science Foundation Ireland grant 00/PI.1/C067, € 7.5M, 2001-2007)
- CEmACS: Complex Embedded Automotive Control Systems (with Robert Shorten as PI, EU STREP Project, €220k, 2004-2007).
- Resource allocation in WLAN's (PI, Science Foundation Ireland grant 03/IN3/I396, € 1.9M 2004-2008. Lead partner in € 5.9M Investigator cluster with University of Limerick, Dublin Institute of Technology and Intel Ireland.)
- FutureComm (PRLTI grant with WIT, co-PI with David Malone on € 699K share of € 3.2M overall grant, 2007-2010)
- Network Mathematics (PRLTI grant € 1.5M share of € 2.2M HI structural grant joint with CTVR at Trinity College Dublin, 2007-2010)
- Next Generation Communication Networks (co-PI with Robert Shorten, Science Foundation Ireland grant € 4.1M, 2007-2011).
- Flexible Architecture for Virtualizable future wireless Internet Access (FLAVIA), EU STREP project (co-PI with David Malone, project co-ordinated by University of Rome Tor Vergata, 2010-2013).
- FAME (SFI-funded Strategic Research Cluster involving TSSG, TCD, UCD, UCC and the Hamilton Institute, co-PI with David Malone, 2009-2014).