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Device-to-Device Communication Networks

We are investigating key cross-layer resource allocation problems for Device-to-Device (D2D) communications at the Physical, Network and Application Layers

  • Network Transmission mode selection, Transmit Power Control and User-Behavior Control

Device-to-Device (D2D) – Two users in proximity in cell in a mobile network transmit signal directly to each other without going through base-station

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                                      D2D communications in Heterogeneous Networks and its applications                                           [from Feng, Daquan, et al. “Device-to-device communications in cellular networks.”IEEE Communications Magazine 52.4 (2014): 49-55.]

D2D Communications

  • Can Increase Spectral Efficiency and Energy Efficiency
    • Physical Proximity, and potential reuse gain and hop gain
  • Reduce Transmission Delay
  • As with other short-range wireless transmission methods
    • Offload Base-Station traffic
    • Alleviate congestion in the core network
  • Part of Heterogeneous networks
    • At simplest level two-tier networks

Presented by Data61 Networks Student Nicole Sawyer, and Published, at IEEE ICC 2016 “Pareto-efficient cross-layer repeated game for Device-to-Device (D2D) communications” (2nd author D. Smith):

  • Non-cooperative cross-layer repeated game with D2D underlay
    • Jointly optimises mode selection at the network layer and power control at the PHY layer for a distributed wireless network with D2D communications
    • Aims to minimise transmit power, and select optimal transmission mode, while achieving acceptable packet delivery ratio (PDR).
  • Underlay and reuse mode, D2D devices move from reuse mode to cellular mode sharing the cellular user’s spectral resource
  • Two-part game, transmit-power control game at PHY and network-mode game at Network layer
    • PHY game used as input into Network layer game, two-armed bandit game
    • Unique Nash equilibria at both layers, Pareto efficient across both layer