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Network switching strategy for energy conservation in heterogeneous networks
Yujae Song1, Wooyeol Choi2, Seungjae Baek1
1ICT R&D Unit, Korea Institute of Ocean Science and Technology, Gyeonggi-do, Korea.
Plos One
|February 28, 2017
Summary
This study introduces an energy-efficient handover strategy for heterogeneous networks (HetNets) that minimizes base station (BS) energy consumption. The strategy ensures quality of service (QoS) for mobile terminals (MTs) by considering stochastic handover parameters.
Area of Science:
- Wireless communication networks
- Mobile computing
- Network engineering
Background:
- Heterogeneous networks (HetNets) are crucial for managing escalating mobile data traffic.
- Handovers are vital for maintaining connectivity in dense HetNets.
- Existing handover strategies often overlook energy efficiency.
Purpose of the Study:
- To propose an energy-efficient handover strategy for HetNets.
- To minimize base station (BS) energy consumption without compromising mobile terminal (MT) quality of service (QoS).
- To account for the stochastic nature of handover parameters and energy consumption in decision-making.
Main Methods:
- Formulation of the handover problem as a constrained Markov decision process (CMDP).
- Minimization of energy consumption as the objective within the CMDP.
- Guaranteeing MT QoS (transmission delay, call-dropping probability) as constraints.
- Utilizing the Lagrangian method and value iteration to find an optimal policy.
Main Results:
- The proposed strategy effectively minimizes energy consumption in HetNets.
- Quality of Service (QoS) requirements for mobile terminals (MTs) are successfully met.
- Simulation results validate the effectiveness of the developed handover strategy.
Conclusions:
- The proposed handover strategy offers a viable solution for energy efficiency in HetNets.
- The CMDP framework accurately models stochastic handover parameters and energy consumption.
- This approach balances energy savings with essential QoS guarantees for mobile users.
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