Contract-based interference coordination in heterogeneous cloud radio access networks

Mugen Peng, Xinqian Xie, Qiang Hu, Jie Zhang, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

Heterogeneous cloud radio access networks (H-CRANs) are potential solutions for improving both spectral and energy efficiencies by embedding cloud computing into heterogeneous networks. The interference among remote radio heads (RRHs) can be suppressed with centralized cooperative processing in the base band unit (BBU) pool, while the inter-tier interference between RRHs and macro base stations (MBSs) is still challenging in H-CRANs. In this paper, to mitigate this inter-tier interference, a contract-based interference coordination framework is proposed, in which three scheduling schemes are involved, and the downlink transmission interval is divided into three phases accordingly. The core idea of the proposed framework is that the BBU pool covering all RRHs is selected as the principal that would offer a contract to the MBS, and the MBS as the agent decides whether to accept the contract or not according to an individual rational constraint. An optimal contract design that maximizes the rate-based utility is derived when perfect channel state information (CSI) is acquired at both principal and agent. Furthermore, contract optimization under the situation in which only partial CSI can be obtained from practical channel estimation is addressed as well. Monte Carlo simulations are provided to confirm the analysis, and simulation results show that the proposed framework can significantly increase the transmission data rates over baselines, thus demonstrating the effectiveness of the proposed contract-based solution.

Original languageEnglish (US)
Pages (from-to)1140-1153
Number of pages14
JournalIEEE Journal on Selected Areas in Communications
Volume33
Issue number6
DOIs
StatePublished - Jun 1 2015

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Keywords

  • Base stations
  • Cloud computing
  • Contracts
  • Game theory
  • Games
  • Heterogeneous cloud radio access networks
  • Interference
  • Radio access networks
  • contract-based game theory
  • interference coordination

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