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Efficiency Maximization through Cross-Layer Innovation in Future Wireless Systems

Addressing cost constraints in wireless technology, this program explores innovative radio techniques and spectrum utilization, aiming to enhance efficiency and performance. Researchers focus on physical layer advances and cross-layer operations, with dynamic spectrum use and cognitive radio key components. The program aims to optimize system performance and link-level operations across various system topologies, ensuring cost-effective, high-quality service delivery. With a holistic approach, it explores multiple access methods, modulation techniques, and adaptive resource management. The collaborative effort involves academia and industry experts, aiming to revolutionize wireless technologies and drive system efficiencies beyond current limits.

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Efficiency Maximization through Cross-Layer Innovation in Future Wireless Systems

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  1. Reducing Cost-per-Bit: Future Wireless Tim Moulsley Philips Research Chair of Core 4 Efficiency Industry Steering Group

  2. Introduction • The reverse side of the coin to new revenue generation is cost constraint • Drivers are: • ‘New radio’ • Innovative use of radio spectrum • Deregulation trend • This element of the Core 4 programme applies: • Combination of physical layer techniques • Cognitive radio • Cross-layer operation ……………To secure new Delivery Efficiencies Acknowledgement: Is the main source of funding for the 22 researchers

  3. Portable Media MP3 PDA Smart Phone Convergent devices CellularPhones DSC Gaming MobileImaging Video Context: Mobile Convergence

  4. Context: Capability Evolution Driving performance beyond today’s limits 30 10 Typical range (km) GPRS “4G” EGPRS 1 UMTS UMTS LTE HSDPA 802.16 802.11x 0.1 10 1 0.1 100 Typical user rate (Mbps)

  5. Programme Objective • Highest Performance and Efficiency Approach • Joint optimisation of link-level & system level • Dynamic spectrum use • Cross-layer adaptation and auto-planning ………. Applied to different system topologies Assumptions • Starting point: 3GPP UMTS Long Term Evolution • Multiple Antennas • Multi-Carrier vs. Single-Carrier • Bandwidth: 1.25 MHz - 100 MHz • Operating Frequency: 450 MHz - 5 GHz

  6. Holistic Approach to Efficiency Objectives Service Quality Cost System Capacity Efficiency: Cost/bit/sec/Hz/area ??? Spectrum Usage System Architecture Air-Interface Options Sub-System Features • Multiple Access • Link Adaptation • Modulation/Coding • Multiple Antennas • Beamforming • Interference Suppression • Advanced Receivers • Fixed vs Dynamic • Spectrum Allocation vs. Spectrum Selection • Cognitive Radio • (Spectrum Sensing, Technology • Identification) • Cellular • Multihop • Full Mesh • Cooperative Relaying • Resource Management • Multi-Layer Operation Technologies

  7. FRS FRS freq. 1 FRS FRS FRS FRS freq. 2 MS MS MS MS MS MS MS MS BS BS BS freq. 1 freq. 1 System Topologies Multihop freq. 1 Mesh freq. 1 A3 An A2 BS Distributed Antennas Co-located A1

  8. Work Programme Structure • WP1: Optimum Combination of Air-Interface Techniques (Prof Lajos Hanzo, University of Southampton) • Advanced MTMR Techniques • Performance Evaluation of Air Interface Techniques • RF Requirements in Co-operative Terminals • WP2: Spectrum Sharing & Enabling Techniques through Cognitive Radio (Prof Mark Beach, University of Bristol) • Spectrum Sharing • Impact on System Requirements • Spectrum Sharing Efficiency Gains • WP3: Joint Link & System Resource Management(Prof Hamid Aghvami, Kings College London) • Cross-layer Resource Management • Adaptive & Self-Organising Networks • Overall System Efficiency

  9. Research Output • Wireless solutions offering leading-edge performance and efficiency • Enhancements to physical layer for efficient delivery • Design rules for dynamic spectrum management • Theoretical and achievable gains from spectrum sharing • How to do joint link and system optimisation • Scalable and modular cross-layer operation • Documented in Internal Reports, Patents, Journal Publications

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