Content-Aware Radio Resource Management for IMT-Advanced Systems
Creators: name: Johal, Muhammad
Publisher: name: Lancaster University
Year: 2017
Subjects: radio resource management
content-aware radio resource management
cross layer optimisation
IMT-Advanced

description: Radio Resource Management (RRM) is crucial to efficiently and correctly
      manage the delivery of quality-of-service (QoS) in IMT-Advanced systems.
      Various methods on radio resource management for LTE/LTE-Advanced traffic
      have been studied by researchers especially regarding QoS handling of
      video packet transmissions. Usually, cross-layer optimisation (CLO)
      involving the PHY and MAC layers, has been used to provide proper resource
      allocation and distribution to the entire system. Further initiatives to
      include the APP layer as part of CLO techniques have gained considerable
      attention by researchers. However, some of these methods did not
      adequately consider the level of compatibility with legacy systems and
      standards. Furthermore, the methods did not wholly address User Equipment
      (UE) mobility or performance metrics for a specific data type or a
      specified period.
      
       Consequently, in this thesis, a content-aware radio RRM model employing a
      cross-layer optimiser focusing on a video conferencing/streaming
      application for a single cell long-term evolution (LTE) system has been
      proposed. Based on two constructed look-up tables, the cross-layer
      optimiser was found to dynamically adjust the transmitted video data rates
      depending on the UE or eNodeB SINR performance. The proposed look-up
      tables were derived from the performance study of the LTE classical
      (baseline) simulation model for various distances at a certain UE
      velocity. Two performance parameters, namely the average throughput and
      measured SINR were matched together to find the most suitable data rates
      for video delivery in both the uplink and downlink transmissions. 
      
       The developed content-aware RRM model was then tested against the LTE
      baseline simulation model, to benchmark its capability to be used as an
      alternative to existing RRM methods in the present LTE system. Based on
      the detailed simulations, the output performance demonstrated that for
      video packet delivery in both uplink and downlink transmissions, the
      content-aware RRM model vastly outperformed the legacy LTE baseline
      simulation model with regard to the packet loss ratio and average
      end-to-end delay for the same amount of throughput.
      
       The baseline simulation model and the newly developed cross-layer
      approach were investigated and compared with practical measurement results
      in which PodNode technology, besides other components and supporting
      simulation software, were used to emulate the LTE communication system.
      The first emulation experiment involving the baseline model was generally
      in sync with the uplink throughput simulation performance. The second test
      which implemented the cross-layer approach employing the look-up table
      derived from the previous emulated results, confirmed the viability of the
      proposed content-aware RRM model to be used in current LTE or LTE-Advanced
      systems for improving the performance in the packet loss ratio and average
      packet delay.