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Bell Labs Ireland research on small cells [Davide Cherubini]
 

Bell Labs Ireland research on small cells [Davide Cherubini]

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Davide Cherubini from Alcatel-Lucent Bell Labs Ireland (BLI) talks about their work on increasing energy efficiency in cellular networks through 'green radio' solutions.

Davide Cherubini from Alcatel-Lucent Bell Labs Ireland (BLI) talks about their work on increasing energy efficiency in cellular networks through 'green radio' solutions.

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    Bell Labs Ireland research on small cells [Davide Cherubini] Bell Labs Ireland research on small cells [Davide Cherubini] Presentation Transcript

    • BLI Research on Small Cells
      Imran Ashraf
      April 2010
      Davide CherubiniBell Labs Ireland
      Networks & Networking Group
    • Spectrally Efficient Cellular Networks
      • Heterogeneous network deployment
      Femtocell overlay on the GSM macrocell network
      Localized coverage through femtocells – high data rates
      • Partial re-use of macrocell GSM frequencies
      Femtocells perform sensing for unused GSM spectrum by macrocells
      The vacant spectrum is opportunistically used by femtocells with tight interference constraints on the macrocell network
      Capacity increase for femtocells with minor impact on the macrocell network
      2| July 2010
      Mbps
    • Green Cellular Networks
      Total Consumption = 12 W
      Total Consumption = 7.3 W
      Power Amplifier(2 Watts)
      Power Amplifier(0 Watt)
      Power Source (85 % efficiency)
      Power Source (85 % efficiency)
      Microprocessor
      (RF On)(3.7 Watts)
      Microprocessor (RF Off)(2.7 Watts)
      FPGA/Other Circuitry(4.5 Watts)
      FPGA/Other Circuitry(3.5 Watts)
      SLEEP Mode
      ACTIVE Mode
      • Use of low-power small cells to off-load macrocell traffic
      • Network energy consumption increases in dependency of the scale of small cell deployment
      • Energy-Efficient algorithms for small cells
      Coverage-aware Switch-offs
      Detect existing spatial coverage and switch-off base stations
      Traffic-aware Sleep modes
      Detect UE activity via carrier sniffing and temporarily switch-off idle small cells
      Energy consumption follows the traffic
      3| July 2010
    • Network Power Savings using Sleep Modes
      Network energy consumptionfor operator with 40% market share (Future improved Technologies)
      Network energy consumption for operator with 40% market share (Today)
      Higher macrocell efficiency
      97% of energy costs paid by end user
      Higher picocell efficiency
      Picocell contribution increases linearly
      Picocell contribution does not increase linearly anymore
      100% of energy costs paid by operator
      75% reduction in network power consumption
      4| July 2010
    • Future - Autonomous Networks
      UE
      UE
      UE
      Network
      Network
      Network
      Now
      Future
      Past
      Ongoing research is in here
      Objective
      Objective
      Model
      Objective
      Model
      Objective
      Model
      Automated Program Generation (offline)
      Algorithm
      Algorithm
      Network Planners
      Design stage
      measurements
      measurements
      measurements
      Model
      Automated Program Generation
      (online)
      Algorithm
      measurements
      drive testing
      BS
      BS
      BS
      BS
      The algorithm generation process is now distributed and performed locally and continuously by the network nodes themselves. Nodes now have ability to autonomously specialise their individual behaviour according to environment.
      Algorithms are generated using automated means, (Genetic Programming). Design process is done offline, and resulting algorithm is implemented in the network.
      Algorithms for auto-configuration and self-optimisation are developed manually, and used to automate the network configuration and optimisation.
      Planning and optimisation is performed manually through network planning engineers and drive testing.
      5| July 2010
    • Wilson Street Project
      Scope
      Development of a series of small cell demos
      http://www.wilson-street.com
      @Bell Labs Ireland
      First permanent small cells platform for research
      • validation on real devices
      • indoor open service cells
      • open platform
      • looking at the future!
      6| July 2010
    • WirelessLab SIG Events
      Join WirelessLab’s Energy-Efficient Wireless Access NetworksSpecial Interest Group!
      For further information:
      www.wirelesslab.ie
      Interested in further discussions onenergy-efficient wireless communications?
      7| July 2010
    • Any Questions?
      Thank You