access icon free Coalition-based sleep mode and power allocation for energy efficiency in dense small cell networks

In this study, the authors focus on energy efficiency (EE) optimisation via the cooperation of small cell base stations (SBSs) in dense small cell networks (DSCNs) where the control plane (C-plane) and data plane (D-plane) are decoupled. They propose a coalition-based sleep mode and power allocation (CSMPA) scheme to improve the DSCN EE while guaranteeing the target rates of users and maintaining the system capacity. In the CSMPA scheme, the cooperation of SBSs is formulated as a coalitional game in partition form and a centralised heuristic coalition formation algorithm without power cost is developed to achieve the final stable coalition structure. Each SBS can serve users in the active subframes and sleep in those subframes without data transmission. Afterwards, since the interference between coalitions affects EE, a distributed price-based power allocation algorithm is presented to optimise the transmit power of active SBSs per subframe. System-level simulation results show that the proposed CSMPA scheme can yield less number of outage users and significant EE performance gain without jeopardising system capacity.

Inspec keywords: telecommunication power management; game theory; cooperative communication; energy conservation; radiofrequency interference; cellular radio

Other keywords: distributed price-based power allocation algorithm; transmit power optimization; coalition-based sleep mode-and-power allocation scheme; interference; heuristic coalition formation algorithm; D-plane; DSCN EE; CSMPA scheme; C-plane; energy efficiency optimisation; coalitional game; control plane; data plane; small cell base stations cooperation; dense small cell networks; SBS cooperation

Subjects: Electromagnetic compatibility and interference; Mobile radio systems; Probability theory, stochastic processes, and statistics; Telecommunication systems (energy utilisation); Energy conservation; Game theory

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