Publications

Books

Journal Articles

2015 -

2014 - 2011

2010 - 2008

      2005-2007

        2002-2004

          1999-2001

            Letters

              Patents

                • J. Thornton, D. Grace, M. H. Capstick, T.C. Tozer, Antennas for Cellular Communications, UK patent 0113192.9, 31 May 2001.
                • P D Mitchell, D Grace, T C Tozer, Bandwidth Assignment, UK patent EP01306979, 2001 .

                Invited Conference Papers

                • Q. Zhao, D. Grace, Transfer Learning for QoS Aware Topology Management in Energy Efficient 5G Cognitive Radio Networks, 5GU 14, November 2014
                • N. Morozs, T. Clarke, D. Grace, Distributed Q-Learning Based Dynamic Spectrum Access in High Capacity Density Cognitive Cellular Systems Using Secondary LTE Spectrum Sharing, International Symposium on Wireless Personal Multimedia Communications (WPMC'2014), September 2014
                • S. Rehan, D. Grace, Energy-Aware Topology Management for High Capacity Density Temporary Event Networks, ATC'13 - Special Section on Green Communications, Vietnam, 16 – 18 October 2013
                • N. Morozs, T. Clarke, D. Grace, Case-Based Reinforcement Learning for Cognitive Spectrum Assignment in Cellular Networks with Dynamic Topologies, Military Communications and Information Systems Conference 2013, Saint Malo, France, 7-9 October 2013
                • Q. Zhao, T. Jiang, N. Morozs, D. Grace, T. Clarke, Transfer Learning: A Paradigm for Dynamic Spectrum and Topology Management in Flexible Architectures, IEEE VTC-Fall 2013 Workshop, September 2013
                • A. Oloyede and D. Grace, Energy Efficient Soft Real-time Spectrum Auction for Dynamic Spectrum Access, IEEE ICT-2013, Casablanca, Morocco, May 2013
                • A. Ramli and D. Grace, Reducing Energy Consumption in Future Broadband Wireless Networks through a Hierarchical Architecture, Mobile VCE Green Communications Workshop, Brussels, 23 June 2011
                • D. Grace, J. Chen, T. Jiang, P.D. Mitchell, Using Cognitive Radio to Deliver ‘Green’ Communications, CROWNCOM’09, Hannover, Germany, June 2009
                • D. Grace, Overview of Cognitive Radio and Cognitive Networks Research at University of York, IET Event on Cognitive Radios and Software Defined Radios, September 2008.
                • D. Grace and P. Likitthanasate, A Business Modelling Approach for Broadband Services from High Altitude Platforms, International Conference on Telecommunications (ICT'06), Madeira, Portugal, May 2006.
                • D. Grace, M. Mohorcic, M. Oodo, J. Horwath, M.H. Capstick, M. Bobbio Pallavicini, M. Lalovic, An Overview of the European CAPANINA Project - Broadband for All from High Altitude Platforms, 5th Stratospheric Platforms Systems Workshop, Tokyo, Japan, 23-24 February 2005.
                • P. D. Mitchell, T. C. Tozer, D. Grace, Improved quality of service in future satellite systems through effective medium access control, IEE Seminar on: The end-to-end challenges of broadband via satellite, London, UK, January 2005.
                • D. Grace, M. Mohorcic, J. Horwath, M. H. Capstick, M. Bobbio Pallavicini, M. Fitch, Communications from Aerial Platform Networks delivering Broadband for All - An Overview of the CAPANINA Project, International HAPS Workshop, Soeul, Korea, November 2004.
                • D. Grace, J. Thornton, G.P. White, C.L. Spillard, D.A.J.Pearce et al, The European HeliNet Broadband Communications Application - An Update on Progress, Japanese Stratospheric Platforms Systems Workshop, Japan, February 2003.
                • T. C. Tozer & D. Grace, HeliNet: The European solar-powered HAP Project, Unmanned Vehicle Systems Technology Conference 2001, 6-7 December 2001.
                • D. Grace, J. Thornton, T. Konefal, C. Spillard and T.C. Tozer, Broadband communications from High Altitude Platforms - The Helinet solution, 4th International Symposium on Wireless Personal Multimedia Communications (WPMC '01), Aalborg, Denmark, September 2001, pp. 75-80.
                • D. Grace, T. C. Tozer, & N. E. Daly, Communications from High Altitude Platforms - A European Perspective, 2nd Stratospheric Platforms System Workshop, Tokyo, Japan, September 2000.
                • T. C. Tozer & D. Grace, Broadband Service Delivery from High Altitude Platforms, Communicate 2000 (Online conference), 2-13 Oct 2000.

                Conference Papers

                2016

                • J. Lun, D.Grace, Y. Han, A.G. Burr, K. Leppanen, T. Cai, Millimetre Wave Backhaul/Fronthaul Deployments for Ultra-dense Outdoor Small Cells, IEEE WCNC 2016-Workshops, April 2016
                • S. Costanzo, R. Shrivastava, K. Samdanis, D. Xenakis, X. Costa-Perez, D. Grace, Service-oriented Resource Virtualization for Evolving TDD Networks Towards 5G, IEEE WCNC 2016, April 2016
                • A. Oloyede, D. Grace, Economic Modeling With Green Resource Management for Future Wireless Broadband Networks, WONS 2016, January 2016

                2015

                • A. Ramli, H. Basrudin, M. Yaakop, D. Grace, Energy Efficiency of a Dual Hop Clustered Networks in a High Data Rate Applications, International Conference on Engineering Technologies and Entrepreneurship 2015 (ICETE-2015), Kuala Lumpur, November 2015
                • A. Ahmed, D. Grace, A Dual-hop Backhaul Network Architecture for 5G Ultra-Small Cells, IEEE ICUWB 2015 WOS 02, October 2015
                • L. Mohammed Bello, P.D. Mitchell, D. Grace, T. Mickus, Q-learning based Random Access with Collision free RACH interactions for Cellular M2M, International Conference on Next Generation Mobile Applications, Services and Technologies (NGMAST) 2015, Cambridge, September 2015
                • S. Rehan, D. Grace, Short Paper: Efficient Joint Operation of Advanced Radio Resource and Topology Management in Energy-Aware 5G Networks, IEEE VTC-Fall 2015, September 2015
                • N. Morozs, T. Clarke, D. Grace, Short Paper: Intelligent Secondary LTE Spectrum Sharing in High Capacity Cognitive Cellular Systems, IEEE VTC-Fall 2015, September 2015
                • N. Morozs, T. Clarke, D. Grace, Short Paper: Intelligent Dynamic Spectrum Access in Cellular Systems with Asymmetric Topologies and Non-Uniform Traffic Loads, IEEE VTC-Fall 2015, September 2015
                • Q. Zhao, D. Grace, Using K-means clustering with Transfer and Q learning for Spectrum, Load and Energy Optimization in Opportunistic Mobile Broadband Networks, IEEE ISWCS 2015, August 2015
                • N. Morozs, T. Clarke, D. Grace, Using Bayesian Networks for Convergence Analysis of Intelligent Dynamic Spectrum Access Algorithms, IEEE ICC 2015 – Workshop, June 2015
                • S. Costanzo, R. Shrivastava, D. Xenakis, K. Samdanis, D. Grace, L. Merakos, An SDN-based virtual cell framework for enhancing the QoE in TD-LTE pico cells, Seventh International Workshop on Quality of Multimedia Experience (QoMEX) 2015, 26-29 May 2015
                • S. Nuuman, D. Grace, T. Clarke, A Quantum Inspired Reinforcement Learning Technique for Beyond Next Generation Wireless Networks, IEEE WCNC 2015 – Workshop – So-HetNets, March 2015
                • J. Lun, D. Grace, Software Defined Network for Multi-tenancy Resource Sharing in Backhaul Networks, IEEE WCNC 2015 – Workshop 5GArch, March 2015


                2014

                • Z. Li, D. Grace, P.D. Mitchell, Cell Division, Migration and Death for Energy Efficient 5G Ultra-small Cell Networks, IEEE Globecom 2014, 5G Workshop, December 2014
                • R. Shrivastava, S. Costanzo, K. Samdanis, N. Passas, D. Grace, An SDN-based Framework for Elastic Resource Sharing in Integrated FDD/TDD LTE-A HetNets, CloudNet 2014, October 2014
                • L.M. Bello, P.D. Mitchell, D. Grace, Frame based Back-off for Q-learning RACH access in LTE networks, ATNAC 2014, September 2014
                • Z. Li, D. Grace, P.D. Mitchell, Traffic Perception Based Topology Management for 5G Green Ultra-small Cell Networks, IEEE Cognitive Cellular Systems 2014, Workshop on 5G, September 2014
                • Q. Zhao, D. Grace, Dynamic Topology Management in Flexible Aerial-Terrestrial Networks for Public Safety, IEEE Cognitive Cellular Systems 2014, Workshop on Public Safety, September 2014
                • J. Lun and D. Grace, Cognitive Green Backhaul Deployments for Future 5G Networks, IEEE Cognitive Cellular Systems 2014, Workshop on Green Radio, September 2014
                • K. Samdanis, R. Shrivastava, A. Prasad, P. Rost, D. Grace, Virtual Cells: Enhancing the Resource Allocation Efficiency for TD-LTE, IEEE VTC-Fall 2014, September 2014
                • N. Morozs, T. Clarke, D. Grace, Q. Zhao, Distributed Q-Learning Based Dynamic Spectrum Management in Cognitive Cellular Systems: Choosing the Right Learning Rate, IEEE ISCC 2014, Madeira, Portugal, 23-26 June 2014
                • Y. Yan, P.D. Mitchell, T. Clarke, D. Grace, Adaptation of the ALOHA-Q protocol to Multi-Hop Wireless Sensor Networks, European Wireless 2014, 14-16 May 2014
                • L. M. Bello, P.D. Mitchell, D. Grace, Application of Q-Learning for RACH Access to Support M2M Traffic over a Cellular Network, European Wireless 2014, 14-16 May 2014
                • A. Oloyede, D. Grace, Energy Efficient Learning Based Auction Process for Cognitive Radio Systems, IEEE CCNC 2014, January 2014

                2013

                • A. Fisusi, D. Grace, P.D. Mitchell, Interference Aware, Energy Efficient Resource Allocation for Beyond Next Generation Mobile Networks, IEEE PIMRC 2013, September 2013
                • S. Konsunalp, D. Grace, T. Clarke, Practical Implementation Issues of Reinforcement Learning Based ALOHA for Wireless Sensor Networks, IEEE ISWCS 2013, August 2013
                • Y. Yan, P.D. Mitchell, D. Grace, T. Clarke, Distributed Frame Size Selection Algorithm for Q Learning based Slotted ALOHA, IEEE ISWCS 2013, August 2013
                • N. Morozs, T. Clarke, D. Grace, A Novel Adaptive Call Admission Control Scheme for Distributed Reinforcement Learning Based Dynamic Spectrum Access in Cellular Networks, IEEE ISWCS 2013, August 2013
                • S. Rehan and D. Grace, Macro-Cell Overlaid Topology Management for Beyond Next Generation Mobile Broadband Systems, FuNeMs 2013, July 2013
                • Q. Zhao and D. Grace, Agent Transfer Learning for Cognitive Resource Management on Multi-hop Backhaul Networks, FuNeMs 2013, July 2013
                • A. Fisusi, D. Grace, P.D. Mitchell, Energy Efficient Cluster-Based Resource Allocation and Topology Management for Beyond Next Generation Mobile Broadband Networks, IEEE ICC 2013 Workshop on GBA, June 2013
                • X. Chen, Z. Zhao, D. Grace, H. Zhang, Reciprocal Learning for Cognitive Medium Access, IEEE Wireless Communications and Networking Conference (WCNC), April 2013
                • M. Baz, P.D. Mitchell, D. Grace, D.A.J. Pearce, Gamma Distribution Based CSMA-CA Back-off Scheme for Multi-hop Wireless Networks, IEEE SIECPC-2013, April 2013
                • S. Rehan and D. Grace, Combined Green Resource and Topology Management for Beyond Next Generation Mobile Broadband Systems, IEEE International Conference on Computing, Networking and Communications 2013, January 2013

                2012

                • Q. Zhao, D. Grace, Application of Cognition based Resource Allocation Strategies on a Multi-hop Backhaul Network, IEEE International Conference on Communications Systems (ICCS’12), November 2012
                • N. Khan, T. Jiang, D. Grace, A.G. Burr, C. Oestges, Impact of Multi-beam Antenna Amplitude Tapering on Co-Channel Interference and Backhaul Throughput Density, Wireless Personal Multimedia Communications, (WPMC’12), September 2012
                • Y. Han, D. Grace, P.D. Mitchell, Energy Efficient Topology Management for Beyond Next Generation Mobile Broadband Systems, IEEE ISWCS'12, August 2012
                • Y. Chu, P.D. Mitchell, D. Grace, ALOHA and Q-Learning Based Medium Access Control for Wireless Sensor Networks, IEEE ISWCS’12, August 2012
                • Y. Tang, L. Wang, D. Grace, J. Wei, Utility based cooperative spectrum leasing in cognitive radio networks, IEEE ISWCS’12, August 2012
                • Y. Chu, P.D. Mitchell, D. Grace, Reinforcement Learning based ALOHA for Multi-Hop Wireless Sensor Networks with Informed Receiving, IET Wireless Sensors Systems (WSS), July 2012
                • K. Lee, P.D. Mitchell, D. Grace, DRMA-CR: Distributed Reservation Multiple Access with Consecutive Requests for Wireless Sensor Networks, IET Wireless Sensor Systems (WSS), July 2012

                2011

                • H. Li, D. Grace, P.D. Mitchell, Multiple Access with Multi-Dimensional Learning for Cognitive Radio in Open Spectrum, IEEE ISCIT 2011, October 2011 
                • Y. Tang, D. Grace, T. Clarke, J. Wei, Multichannel Non-persistent CSMA MAC Schemes with Reinforcement Learning for Cognitive Radio Networks, IEEE ISCIT 2011, October 2011 
                • R. Jin, D. Grace, P.D. Mitchell, Cognitive UWB Spectrum Sharing and Power Allocation in a Multipath Fading Channel, IEEE ISCIT 2011, October 2011
                • K. Lee, P.D. Mitchell, D. Grace, DRMA-AR: Distributed Reservation Multiple Access with Adaptive Requests for Wireless Networks, IEEE ISWCS 2011, September 2011

                2010

                • Y. Xi, S. Liu, J. Wei, A.G. Burr, D. Grace, Asymptotic Performance Analysis of Uncoded Packet Cooperative Relaying System over Quasi-Static Fading Channels, PIMRC 2010, September 2010
                • Y. Xi, S. Liu, A.G. Burr, D. Grace, Performance Analysis and Power Allocation for Packet Decode-and-Forward Cooperative Relaying System, IEEE VTC-Fall, September 2010
                • S. Li, D. Grace, J. Wei, D. Ma, A Novel Guaranteed Handover Scheme for HAP Communications Systems with Adaptive Modulation and Coding, IEEE VTC-Fall, September 2010
                • A. Ramli, D. Grace, RF Signal Strength based Clustering Protocols for a Self-Organizing Cognitive Radio Network, IEEE International Symposium on Wireless Communication Systems (ISWCS) 2010, York, UK, September 2010
                • R. Jin, D. Grace, P.D. Mitchell, Cognitive Radio for UWB Spectrum Sharing and Power Allocation, WUN COGCOM 2010 Workshop part of IEEE International Symposium on Wireless Communication Systems (ISWCS) 2010, York, UK, September 2010
                • J. Qiu, P.D. Mitchell, D. Grace, Receiver based Interference Protection for MAC Protocols in WSNs, IEEE International Symposium on Wireless Communication Systems (ISWCS) 2010, York, UK, September 2010
                • S. Li, D. Grace, J. Wei, D. Ma, Guaranteed Handover Schemes for a Multilayer Cellular System, IEEE International Symposium on Wireless Communication Systems (ISWCS) 2010, York, UK, September 2010
                • H. Li, D. Grace, P.D. Mitchell, Cognitive Radio Multiple Access Control for Unlicensed and Open Spectrum Sensing Requirements, WUN COGCOM 2010 Workshop part of IEEE International Symposium on Wireless Communication Systems (ISWCS) 2010, York, UK, September 2010
                • J. Qiu, P.D. Mitchell, D. Grace, Traffic-oriented Scheduling Algorithm for Aerial Platform based Routing and MAC for WSNs, IWCMC 2010, Crete, Greece, August 2010
                • M.M. Elsokkary, D. Grace, M.M. Riad, Cognitive Multicast Routing with QoS Constraints for Multimedia Applications in Integrated Satellite-HAP System Structures, ICCSIT 2010, July 2010
                • H. Li, D. Grace, P.D. Mitchell, Collision Reduction in Cognitive Radio using Multichannel 1-persistent CSMA combined with Reinforcement Learning, CROWNCOM 2010, Cannes, France, June 2010
                • B. Han, D. Grace, P.D. Mitchell, Cognitive Greedy-Backhaul Routing Metric Exploiting Cross-layer Design for Wireless Ad Hoc and Mesh Networks, CROWNCOM 2010, Cannes, France, June 2010
                • M.M. Elsokkary, D. Grace, M.M. Riad, Oscillation Suppression Cognitive Multicast Routing in Integrated Satellite- HAP System Structures, 2010 International Conference on Networking and Information Technology (ICNIT 2010), Manila, Philippines, June 2010
                • B. Han, D. Grace, P.D. Mitchell, Using Bottleneck-aware Routing to Improve End-to-End Bottleneck Capacity for Heterogeneous Ad Hoc Networks, Karlsruhe Workshop on Software Radios, March 2010

                2009

                  • T. Jiang, D. Grace, P.D. Mitchell, Improvement of Pre-Partitioning on Reinforcement Learning Based Spectrum Sharing, IET International Communication Conference on Wireless Mobile & Computing (CCWMC09), Dec 2009 (Best Paper Award)
                  • X. Chen, Z. Zhao, H. Zhang, T. Jiang, D. Grace, Inter-Cluster Connection in Cognitive Wireless Mesh Networks Based on Intelligent Network Coding, IEEE PIMRC 2009, September 2009
                  • B. Han and D. Grace, Using Cognitive Interference Routing to Avoid Congested Areas in Wireless Ad Hoc Networks, International Workshop on Cognitive Networks and Communications (COGCOM2009), San Francisco, USA, August 2009
                  • M. Yang and D. Grace, Cognitive Radio with Reinforcement Learning Applied to Multicast Downlink Transmission and Distributed Occupancy Detection, International Workshop on Cognitive Networks and Communications (COGCOM2009), San Francisco, USA, August 2009
                  • M. Yang and D. Grace, Cognitive Radio with Reinforcement Learning Applied to Heterogeneous Multicast Terrestrial Communication Systems, CROWNCOM’09, Hannover, Germany, June 2009
                  • L. Stefanutti, R.A. MacKenzie, D. Grace, R. Guzzi, Future of HAPS for Global change monitoring, for surveillance of the territory, meteorology and broad band telecommunications, 33rd International Symposium on Remote Sensing of Environment, to be convened in Stresa, Italy, 4-8 May 2009
                  • M. Smolnikar, M. Mohorcic, T. Javornik, D. Grace, Propagation Impairment Countermeasures in Mobile Stratospheric Operating Environment, IEEE VTC-Spring, April 2009

                  2008

                  • P. Likitthanasate, D. Grace, P.D. Mitchell, Performance of Game-based Spectrum Assignment for a Mixed HAP and Multi-terrestrial Base Station System, HAPCOS Workshop 2008, October 2008
                  • P. Likitthanasate, D. Grace, P. D. Mitchell, Performance of a spectrum sharing game with path gain ratio based cost parameter, IET Seminar on Cognitive Radio and Software Defined Radios: Technologies and Techniques, London, UK, September 2008.
                  • Y. Liu and D. Grace, Cognitive Routing Metrics with Adaptive Weight for Heterogeneous Ad Hoc Networks, IET Seminar on Cognitive Radio and Software Defined Radios: Technologies and Techniques, September 2008.
                  • T. Jiang, D. Grace, Y. Liu, Cognitive Radio Spectrum Sharing Schemes with Reduced Spectrum Sensing Requirements, IET Seminar on Cognitive Radio and Software Defined Radios: Technologies and Techniques, September 2008.
                  • M. Yang and D. Grace, Cognitive Radio based Spectrum Assignment for Heterogeneous Multicast Terrestrial Communication Systems with Different Transmission Rate Requirements, IET Seminar on Cognitive Radio and Software Defined Radios: Technologies and Techniques, September 2008.
                  • J. Chen, D. Grace, P. D. Mitchell, System performance enhancement using path gain ratio for cognitive radio systems with diverse transmission ranges, IET Seminar on Cognitive Radio and Software Defined Radios: Technologies and Techniques, London, UK, September 2008.
                  • M. Yang and D. Grace, Interaction and Coexistence of Multicast Terrestrial Communication Systems with Area Optimized Channel Assignments, 2008 International Workshop on Cognitive Networks and Communications (COGCOM2008) in conjunction with CHINACOM'08, Hangzhou, China, August 2008.
                  • T. Jiang, D. Grace, Y. Liu, Performance of Cognitive Radio Reinforcement Spectrum Sharing Using Different Weighting Factors, 2008 International Workshop on Cognitive Networks and Communications (COGCOM2008) in conjunction with CHINACOM'08,, Hangzhou, China, August 2008.
                  • Y. Liu, D. Grace, P.D. Mitchell, Comparison of CINR-based Cognitive Radio Schemes for Multiple High Altitude Platforms, 2008 International Workshop on Cognitive Networks and Communications (COGCOM2008) in conjunction with CHINACOM'08, Hangzhou, China, August 2008.
                  • T.C. Tozer, D. Grace, A.C. Smith, High Altitude Platforms for VHDR in-theatre Communications, The IET seminar on military satellite communications systems 2008, June 2008
                  • Y. Liu and D. Grace, Improving Capacity for Wireless Ad Hoc Communications Using Cognitive Routing, CROWNCOM 2008, Singapore, May 2008.
                  • J. Chen, D. Grace, P. D. Mitchell, Improving system performance in cognitive radio based wireless systems by using path gain ratio, Karlsruhe Workshop on Software Radios (WSR), Karlsruhe, Germany, March 2008.
                  • D. Grace, P. D. Mitchell, T. Clarke, A. G. Burr, D. A. J. Pearce, Cognitive routing for tactical ad hoc communications, Karlsruhe Workshop on Software Radios (WSR), Karlsruhe, Germany, March 2008.
                  • P. Likitthanasate, D. Grace, P. D. Mitchell, Interaction in cognitive radio based systems, Karlsruhe Workshop on Software Radios (WSR), Karlsruhe, Germany, March 2008.
                  • Yu Deng, Alister G. Burr, Dave Pearce and David Grace, Distributed Beamforming for Cognitive Radio Networks, 2008 International Workshop on Cognitive Networks and Communications (COGCOM2008) in conjunction with CHINACOM'08, Hangzhou, China, 28 Aug. 2008.

                  2007

                    • T. Hult, D. Grace and A. Mohammed, WCDMA Capacity and Coverage Enhancement from Multiple High Altitude Platform Configurations, European Union Conference on Antennas and Propagation, EUCAP2007, Edinburgh, UK, November 2007.
                    • P. Likitthanasate, D. Grace, P. D. Mitchell, Multivariable payoff function design for game theoretic treatment of combined terrestrial and HAP broadband networks, COST 297 Workshop, Wroclaw, Poland, October 2007.
                    • Z. Yang, A. Mohammed, T. Hult, D. Grace, Assessment of Coexistence Performance for WiMAX Broadband in High Altitude Platform Cellular System and Multiple-Operator Terrestrial Deployments, IEEE International Symposium on Wireless Communication Systems (ISWCS) 2007, Trondheim, Norway, October 2007.
                    • J. Chen, D. Grace, P.D. Mitchell, Capacity Analysis of Coexisting TD-SCDMA / WCDMA Systems, IEEE Personal, Indoor and Mobile Radio Communications Conference (PIMRC), Athens, Greece, September 2007.
                    • Z. Yang, A. Mohammed, T. Hult and D. Grace, Optimizing Downlink Coexistence Performance of WiMAX Services in HAP and Terrestrial Deployments in Shared Frequency Bands, 2007 International Waveform Diversity & Design Conference (WDD 2007), Pisa, Italy, June 2007.
                    • Z. Peng and D. Grace, Gigabit Communication Links from a High Altitude Platform to Serve Specialist Users, PGNET 2007, Liverpool, UK, June 2007.
                    • M. Yang and D. Grace, Coexistence Performance of Terrestrial Communication Systems with Area Optimized Channel Assignments, PGNET 2007, Liverpool, UK, June 2007.
                    • P. Likitthanasate, D. Grace, P. D. Mitchell, Game theoretic behaviour of terrestrial and HAP WiMAX systems sharing common spectrum, COST297 Workshop, Prague, Czech Republic, April 2007.

                    2006

                      • Y. Liu, D. Grace, P.D. Mitchell, Dynamic Spectrum Charging Mechanism for a Multiple High Altitude Platform System with Incremental Deployment, First HAPCOS-COST297 Workshop, York, UK, October 2006.
                      • Z. Yang, A. Mohammed, D. Grace, T. Hult, Optimizing Downlink Coexistence Performance of WiMax Services in HAP and Terrestrial Deployments, First HAPCOS-COST297 Workshop, York, UK, October 2006.
                      • P. Likitthanasate, D. Grace, P.D. Mitchell, A Spectrum Etiquette for Future Mixed HAP-terrestrial Cognitive Radio Systems with Minimum Transmit Power Guarantees,, First HAPCOS-COST297 Workshop, York, UK, October 2006.
                      • J. Holis, D. Grace, P. Pechac, The Optimization of Antenna Power Roll-off for High Altitude Platform WCDMA Systems, First HAPCOS-COST297 Workshop, York, UK, October 2006.
                      • G. Chen, D. Grace, T.C. Tozer, Capacity Enhancement through Efficient Constellation Planning for Multiple HAPs, First HAPCOS-COST297 Workshop, York, UK, October 2006.
                      • T. Hult, A. Mohammed, Z. Yang, D. Grace, Performance of a Multiple HAP System Employing Multiple Polarization, Wireless Personal Multimedia Conference '06, September 2006.
                      • Y.-M Lu, D. Grace, and P. D. Mitchell, Capacity evaluation of a multi-hop wireless ad hoc network using minimum impact routing, International Conference on Wireless Communications Networking and Mobile Computing (WiCOM), Wuhan, China, September 2006.
                      • Z. Yang, D. Grace, A. Mohammed, Optimizing Antenna Performance for Improving Coexistence Performance of Providing WiMAX Service from High Altitude Platforms and Terrestrial WiMAX Deployments, Antenn 06, Nordic Antenna Symposium 2006, June 2006.
                      • P. Likitthanasate, D. Grace, P. D. Mitchell, Performance of HAP and terrestrial WiMAX systems using an interference to noise ratio based spectrum etiquette with interference margin, COST297 Workshop - High Altitude Platforms for Communications and Other Services, Oberpfaffenhofen, April 2006.
                      • D. Grace, P. Likitthanasate, A Business Model for Broadband Services from High Altitude Platforms, HAPCOS-COST297 Meeting,, Oberpfaffenhofen, Germany, April 2006.

                      2005

                        • M. Oodo, R. Miura, D. Grace, Spectrum Sharing between High Altitude Platforms and Other Services in Ka-band, Workshop organised by Technical Group of Satellite Communications of IEICE, Nagoya, Japan, October 2005.
                        • K. Katzis, D. Grace, D.A.J. Pearce, Impact of High Altitude Platform Movements on Cellular Handover, International Workshop on High Altitude Platforms (WHAPS), Athens, Greece, September 2005.
                        • Y. Zhang, D. Grace, G.P. White, Exploiting Multiple HAP Constellations in frequency bands below 11GHz, Wireless Personal Multimedia Communications (WPMC) Conference, Aalborg, Denmark, 17 September 2005.
                        • P. Likitthanasate, D. Grace, and P. D. Mitchell, Dynamic spectrum sharing for high altitude platform and terrestrial WiMAX systems sharing a common downlink frequency band, International Workshop on High Altitude Platform Systems (WHAPS), Athens, Greece, September 2005.
                        • K. Akalestos, T.C. Tozer, D. Grace, Emergency Communications from High Altitude Platforms, International Workshop on High Altitude Platforms (WHAPS), Athens, Greece, September 2005.
                        • L. Dong, P. D. Mitchell, and D. Grace, On-board buffering for tunnel outage mitigation in broadband service delivery from high altitude platforms, International Workshop on High Altitude Platform Systems (WHAPS), Athens, Greece, September 2005.
                        • Y. Liu, D. Grace, and P. D. Mitchell, Bandwidth broker based architecture for a multi-hap system with overlapping coverage area, International Workshop on High Altitude Platform Systems (WHAPS), Athens, Greece, September 2005.
                        • E. Falletti, F. Sellone, C. Spillard, D. Grace, A HAP Channel Simulator with Complete Spatial Information for On-board and Ground Smart Antennas, International Workshop on High Altitude Platforms (WHAPS), Athens, Greece, September 2005.
                        • Z. Yang, D. Grace, and P. D. Mitchell, Coexistence Performance of WiMAX in HAP and Multiple-Operator Terrestrial Deployments in Shared Frequency Bands, Wireless Personal Multimedia Communications (WPMC) Conference, Aalborg, Denmark, September 2005.
                        • Z. Yang, D. Grace, P. D. Mitchell, Downlink performance of WiMAX broadband from high altitude platform and terrestrial deployments sharing a common 3.5GHz band, IST Mobile Communications Summit, Dresden, Germany, June 2005.
                        • D. Grace, M. Mohorcic, M. Oodo, M.H. Capstick, M. Bobbio Pallavicini, M. Lalovic,, CAPANINA – Communications from Aerial Platform Networks Delivering Broadband Information for All, IST Mobile and Wireless Summit, Dresden, Germany, June 2005.
                        • C. L. Spillard, P. D. Mitchell, D. Grace, T. C. Tozer, The effectiveness of link outage tolerance as a fade mitigation technique, European Wireless, Nicosia, Cyprus, April 2005.
                        • L. Dong, P. D. Mitchell, D. Grace, Potential of on-board buffering to eliminate outages caused by tunnels in communications service delivery to trains from high altitude platforms, Postgraduate Research Conference in Electronics, Photonics, Communications and Networks, and Computing Science (PREP), Lancaster, UK, March 2005.

                        2004

                          • Y.-M. Lu, D. Grace, P. D. Mitchell, and D. A. J. Pearce, Performance evaluation of minimum impact routing for multi-hop wireless ad hoc network, Wireless Personal Multimedia Communications Conference, Padova, Italy, September 2004.
                          • Y. Liu, D. Grace, and P. D. Mitchell, Interference-based radio resource management for multiple high altitude platforms, Wireless Personal Multimedia Communications Conference, Padova, Italy, September 2004.
                          • P. D. Mitchell, D. Grace, and T. C. Tozer, Adaptive burst targeted demand assignment multiple access (BTDAMA) for geostationary satellite systems, IEEE Personal, Indoor and Mobile Radio Communications Conference, Barcelona, Spain, September 2004.
                          • D. Grace, P. D. Mitchell, and A. G. Burr, Performance of multi-hop ad hoc networks with MIMO, Wireless Personal Multimedia Communications Conference, Padova, Italy, September 2004.
                          • P. D. Mitchell, D. Grace, and A. G. Burr, Improving the performance of IEEE 802.11 in a multi-hop environment, Wireless Personal Multimedia Communications Conference, Padova, Italy, September 2004.
                          • K. Katzis, D.A.J. Pearce, D. Grace,, Fairness in Channel Allocation in a High Altitude Platform Communication System exploiting Cellular Overlap, Wireless Personal Multimedia Communications (WPMC'04) Conference, Abano Terme, Italy, September 2004.
                          • G. Chen, D. Grace, T.C. Tozer, Controlling the Capacity and QoS of Multiple HAP Configurations, Wireless and Personal Multimedia Communications (WPMC'04) Conference, September 2004.
                          • M. Mohorcic, D. Grace, G. Kandus, T.C. Tozer,, Broadband Communications from Aerial Platform Networks, IST Mobile Summit, Lyon, France, June 2004.
                          • P. D. Mitchell, D. Grace, and A. G. Burr, Multi-Standard approach for enhanced communications service provision to rail commuters, IST Mobile Communications Summit, Lyon, France, June 2004, pp. 448-452.
                          • J. Horwath, H. Henniger, M. Knapek and N. Perlot, D. Grace, D. Giggenbach,, Optical communication from HAPs - Overview of the Stratospheric Optical Payload Experiment (STROPEX), AIAA International Communications Satellite Systems Conference, Monterey, USA, May 2004.
                          • C.L. Spillard, B. Gremont, D. Grace, T.C. Tozer,, The Performance of High Altitude Platform Networks in Rainy Conditions, AIAA International Communications Satellite Systems Conference, Monterey, USA, May 2004.
                          • C. L. Spillard, D. Grace, J. Thornton, G. P. White and T.C. Tozer, High Altitude Platforms at York: HeliNet and Beyond, NEW2AN Conference, St Petersburg, February 2004.
                          • K. Katzis, D.A.J. Pearce, D. Grace, Fixed Channel Allocation Techniques Exploiting Cell Overlap for High Altitude Platforms, European Wireless 2004, Barcelona, February 2004.

                          2003

                            • D. Grace, G. Chen, G.P. White, J. Thornton, T.C. Tozer,, Improving the System Capacity of mm-Waveband Broadband Services Using Multiple High Altitude Platforms, IEEE GLOBECOM 2003, San Francisco, December 2003.
                            • P. D. Mitchell, A. G. Burr, and D. Grace, Performance of two-branch route diversity over a highly correlated Rayleigh fading channel, Wireless Personal Multimedia Communications Conference, Yokosuka, Japan, October 2003.
                            • G. Chen, D. Grace, T.C. Tozer,, Exploiting HAP antenna directivity in multiple HAP constellations, Wireless Personal Multimedia Conference 2003, Yokosuka, Japan, October 2003.
                            • D. Grace, C. Spillard, T.C. Tozer,, High Altitude Platform Resource Management Strategies with improved Connection Admission Control, Wireless Personal Multimedia Conference 2003, Yokosuka, Japan, October 2003.
                            • D.A.J. Pearce and D. Grace, Optimising the Downlink Capacity of Broadband Fixed Wireless Access Systems for Packet-Based Communications, IEEE International Communications Conference ICC 2003, Anchorage, 11-15 May 2003.

                            2002

                              • D. Grace, J. Thornton, G. P. White, T. C. Tozer,, Improving spectrum utilisation for broadband services in the mm-Wave bands through the use of multiple high altitude platforms, IEE Conference - Getting the most out of the Radio Spectrum, 24-25 October 2002.
                              • P. D. Mitchell, T. C. Tozer, and D. Grace, Burst targeted demand assignment multiple access (BTDAMA) for ON-OFF type data traffic via satellite, IEEE Personal, Indoor and Mobile Radio Communications Conference, Lisbon, Portugal, September 2002, pp. 1392-1396.
                              • J. Thornton, G. White, C. Spillard, T.C. Tozer and D. Grace., Broadband Communications from The European HeliNet High Altitude Platform - Two Years On, 4th International Airship Convention and Exhibition, Cambridge, UK,, 28-31 July 2002.
                              • C Spillard, D Grace, J Thornton, G P White, T C Tozer, M Mohorcic, E Falletti, Broadband Communications from HeliNet High Altitude Platforms, DASIA 2002, Dublin, 2002 May 2002.
                              • P. D. Mitchell, T. C. Tozer, and D. Grace, Effective medium access control for satellite broadband data traffic, IEE Seminar on Personal Broadband Satellite, London, UK, January 2002, pp. 3/1-7.
                              • D. Grace, C. Spillard, J. Thornton, & T. C. Tozer, Channel Assignment Strategies for a High Altitude Platform Spot-Beam Architecture, PIMRC2002, Lisbon, Sept 2002.

                              2001

                                • P. D. Mitchell, D. Grace, and T. C. Tozer, Comparative performance of the CFDAMA protocol via satellite with various terminal request strategies, IEEE Global Telecommunications Conference, San Antonio, USA, November 2001, pp. 2720-2724.
                                • P. D. Mitchell, D. Grace, and T. C. Tozer, Performance of the combined free/demand assignment multiple access protocol with combined request strategies via satellite, IEEE Personal, Indoor and Mobile Radio Communications Conference, San Diego, USA, September 2001, pp. 90-94.
                                • C. Spillard, J. Thornton, D. Grace & T. C. Tozer, Calculation of Interface Levels Due to Rain Scatter on a High-Altitude Platform Link, Proc. IEEE APS/URSI Symposium, Boston, 9-13 July 2001.
                                • G. De Obaldia-Lee, T. C. Tozer, D. Grace & D. A. J. Pearce, An LMDS Access Protocol for Advanced High-Speed and Bandwidth Intensive Wireless Applications, Proc. VTC Spring 2001 Conference, Rhodes, 6-9 May 2001, pp. 846-850.
                                • C. Spillard, J. Thornton, D. Grace & T.C. Tozer, Calculation of Interference Levels due to rain scatter on High-Altitude Platform links, ICAP '01, Manchester UK, 17-20 April 2001.

                                2000

                                  • N.E. Daly, T.C. Tozer, D. Grace, and D.A.J. Pearce, Frequency Re-use from High Altitude Platforms, Proc. Wireless Personal Multimedia Communications, WPMC 2000, Bangkok, November 2000.
                                  • P. D. Mitchell, T. C. Tozer, and D. Grace, Improved medium access control for data traffic via satellite using the CFDAMA protocol, IEE Seminar on Broadband Satellite: The Critical Success Factors Technology, Services and Markets, London, UK, October 2000, pp. 18/1-7.
                                  • N. E. Daly, T. C. Tozer, D. Grace, C.L. Spillard, D. A. J. Pearce, C. Brown, J. Jones, Frequency Re-use from High Altitude Platforms Using Various Antenna Array Configurations, IST Mobile Communications Summit, Galway, October 2000.
                                  • D. Grace, T. C. Tozer & N. E. Daly, Communications from High Altitude Platforms - A Complementary or Disruptive Technology?, IEE Colloquium on New Access Technologies, London, 31 October 2000.
                                  • G. De Obaldia-Lee, D. Grace, T.C. Tozer, D.A.J. Pearce, Integrated Air Interface Access Schemes for Broadband Wireless Communications, IEEE Vehicular Technology Conference VTC-Fall 2000, Boston, 24-28 September 2000.
                                  • D. Grace, N. E. Daly, T. C. Tozer, D. A. J. Pearce, and A. G. Burr, Communications Performance of High Altitude Platforms Networks operating in the mm-Wave Bands, Airship Convention 2000, Friedrichshafen, July 2000.
                                  • G. De Obaldia-Lee, T. C. Tozer, D. A. J. Pearce, and D. Grace, Broadband Radio Multiple Access Schemes, National URSI Symposium, Abingdon, July 2000.
                                  • G. Olmo, T. C. Tozer, D. Grace, The European HeliNet Project, 3rd International Airship Convention & Exhibition, Friedrichshafen, Germany, 1-5 July 2000.
                                  • G. De Obaldia-Lee, D. A. J. Pearce, D. Grace, and T. C. Tozer, Dynamic Contention Scheme for Broadband Wireless Access, IEEE Wireless 2000, Calgary, July 2000.
                                  • N. E. Daly, D. Grace, T. C. Tozer, D. A. J. Pearce, and A. G. Burr, Prediction of Frequency Reuse Behaviour for High Altitude Platforms, Airship Convention 2000, Friedrichshafen, July 2000.
                                  • T. C. Tozer, D. Grace, J. Thompson & P. Baynham, UAVs and HAPS - Potential Convergence for Military Communications?, IEE Colloquium on Military Satellite Communications, London, 4 July 2000.
                                  • J. F. Adlard, D. Grace & T. C. Tozer, An Improved Null-Steering Algorithm for Polarised VLF, 1st International Workshop on Image & Signal Processing & Analysis, Pula, Croatia, June 2000.
                                  • N. E. Daly, D. Grace, T. C. Tozer, D. A. J. Pearce, and A. G. Burr, Capacity Effects on Terrestrial Broadband Wireless Access Networks Operating in the LMDS Frequency Band during Rainfall Conditions, IEEE Vehicular Technology Conference VTC-Spring 2000, Birmingham, May 2000, pp. 2444-2448.

                                  1995-9

                                    • D. Grace, A G Burr & T. C. Tozer, Performance of a combined Distributed Dynamic Channel Assignment and Power Control Algorithm in a Wireless Environment, IEEE PIMRC '99, Osaka, Japan, 1999.
                                    • D. Grace, T. C. Tozer & A. G. Burr, Modelling the Performance of an All-informed Net which incorporates Distributed Dynamic Channel Assignment, IEEE MILCOM '99, 1999.
                                    • D. Grace, N. E. Daly, T. C. Tozer & A. G. Burr, LMDS from high altitude aeronautical platforms, IEEE GLOBECOM '99, 1999, pp. 2625-2629.
                                    • D. Grace, A.G. Burr, and T.C. Tozer, Performance of a Distributed Dynamic Channel Assignment Algorithm Incorporating Power Control in a Wireless Environment, IEEE GLOBECOM '98, November 1998, pp. 1793-8.
                                    • D. Grace, T.C. Tozer, A.G. Burr, Simulation of a Wireless Communications Network which Employs Distributed Dynamic Channel Assignment, IEE International Conference on SIMULATION, York, UK, September 1998, pp. 432-7.
                                    • D. Grace, A.G. Burr, and T.C. Tozer, The Effects of Interference Threshold and SNR Hysteresis on Distributed Channel Assignment Algorithms for UFDMA, IEEE International Conference on Universal Personal Communications, ICUPC '97, October 1997, pp. 661-5.
                                    • D. Grace, A.G. Burr, and T.C. Tozer, Distributed Channel Assignment for Point-to-Point Links using Unsupervised FDMA for the Terrestrial Radio Environment, Method and Algorithms for Radio Channel Assignment, MATHFIT/EPSRC Conference,, University of Oxford, April 1997.
                                    • D. Grace, A.G. Burr, and T.C. Tozer, Comparison of Different Distributed Channel Assignment Algorithms for UFDMA, 2nd IEE International Conference on Personal, Mobile and Spread Spectrum Communications (ICPMSC'96), December 1996, pp. 38-41.
                                    • D. Grace, A.G. Burr, T.C. Tozer, and S.J. Baines, The Use of Coexistence Etiquettes in the Development of Adaptive Access Mobile Military Communications, IEEE Military Communications Conference (MILCOM '95), November 1995, pp. 508-12.
                                    • D. Grace, A.G. Burr, and T.C. Tozer, The Effects of Building Geometric Displacement Error on Urban Microcellular Ray Based Modelling, IEEE PIMRC '95, September 1995, pp. 542-6.