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Green Virtualization for Multiple Collaborative Cellular Operators

机译：多个协作蜂窝运营商的绿色虚拟化

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摘要

This paper proposes and investigates a green virtualization framework for infrastructure sharing among multiple cellular operators whose networks are powered by a combination of conventional and renewable sources of energy. Under the proposed framework, the virtual network formed by unifying radio access infrastructures of all operators is optimized for minimum energy consumption by deactivating base stations (BSs) with low traffic loads. The users initially associated to those BSs are off-loaded to neighboring active ones. A fairness criterion for collaboration based on roaming prices is introduced to cover the additional energy costs incurred by host operators. The framework also ensures that any collaborating operator is not negatively affected by its participation in the proposed virtualization. A multi-objective linear programming problem is formulated to achieve energy and cost efficiency of the networks’ operation by identifying the set of inter-operator roaming prices. For the case when collaboration among all operators is infeasible due to profitability, capacity, or power constraints, an iterative algorithm is proposed to determine the groups of operators that can viably collaborate. Results show significant energy savings using the proposed virtualization as compared to the standalone case. Moreover, collaborative operators exploiting locally generated renewable energy are rewarded more than traditional ones.
机译：本文提出并研究了一种绿色虚拟化框架，用于在多个蜂窝运营商之间共享基础架构，这些蜂窝运营商的网络由常规能源和可再生能源的组合提供支持。在提出的框架下，通过取消激活低流量负载的基站（BS），优化了统一所有运营商的无线接入基础架构而形成的虚拟网络，以实现最低能耗。最初与那些BS关联的用户被卸载到相邻的活动BS。引入了基于漫游价格的合作公平性标准，以弥补主机运营商产生的额外能源成本。该框架还确保任何合作运营商都不会因其参与提议的虚拟化而受到负面影响。提出了一个多目标线性规划问题，以通过识别运营商之间的漫游价格来实现网络运营的能源和成本效率。对于由于盈利能力，容量或功率限制而无法在所有运营商之间进行协作的情况，提出了一种迭代算法来确定可以切实协作的运营商组。结果表明，与独立案例相比，使用建议的虚拟化技术可节省大量能源。此外，利用本地产生的可再生能源的合作运营商比传统运营商获得的回报更多。

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