Distributed Resource Allocation for Network Slicing Over Licensed and Unlicensed Bands
Distributed Resource Allocation for Network Slicing Over Licensed and Unlicensed Bands
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DOI：
10.1109/jsac.2018.2869964
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发表时间：
2018-10-01
影响因子：
16.4
通讯作者：
Krunz, Marwan
中科院分区：
文献类型：
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作者：
Xiao, Yong;Hirzallah, Mohammed;Krunz, Marwan
网络切片是5G的关键技术之一，因为它能够定制和“切片”公共资源，以支持各种服务和垂直领域。本文介绍了一种新的运营商间网络切片框架，其中多个移动的网络运营商（MNO）可以协调和联合切片授权和未授权频段中的可接入频谱资源。对于授权频带切片，我们提出了一种运营商间频谱聚合方法，该方法允许两个或更多个MNO合作并共享其授权频带以支持一组共同的服务类型。然后，我们考虑共享未授权频段。由于所有的移动网络运营商都享有平等的权利来访问这些频段，我们引入了权利共享的概念，让移动网络运营商共享和交易他们的频谱访问权。我们开发了一个修改后的信封的方法，移动网络运营商评估其价值的权利时，与其他无线技术共存。提出了一种基于重叠联盟形成博弈的网络切片博弈模型，研究了移动网络运营商之间可能的合作。我们证明，我们提出的游戏总是有至少一个稳定的切片结构，最大限度地提高社会福利。为了实现我们提出的框架，而不需要移动网络运营商透露私人信息给其他移动网络运营商，我们开发了一种分布式算法，称为分布式交替方向方法的乘数与部分变量分裂。我们提出的框架的性能评估提供了使用离散事件模拟器，该模拟器是由真实的MNO部署方案的基础上部署的两个主要的蜂窝运营商在城市的都柏林超过400个基站位置。数值结果表明，我们提出的框架几乎可以增加一倍的能力，为每个移动网络运营商在城市环境中的所有支持服务。
Network slicing is one of the key enabling technologies for 5G due to its ability to customize and "slice" a common resource to support diverse services and verticals. This paper introduces a novel inter-operator network slicing framework in which multiple mobile network operators (MNOs) can coordinate and jointly slice their accessible spectrum resources in both licensed and unlicensed bands. For licensed band slicing, we propose an inter-operator spectrum aggregation method that allows two or more MNOs to cooperate and share their licensed bands to support a common set of service types. We then consider the sharing of unlicensed bands. Because all MNOs enjoy equal rights to access these bands, we introduce the concept of right sharing for MNOs to share and trade their spectrum access rights. We develop a modified back-of-the-envelope method for MNOs to evaluate their Value-of-Rights when coexisting with other wireless technologies. A network slicing game based on the overlapping coalition formation game is formulated to investigate the possible cooperation among MNOs. We prove that our proposed game always has at least one stable slicing structure that maximizes the social welfare. To implement our proposed framework without requiring MNOs to reveal private information to other MNOs, we develop a distributed algorithm called distributed alternating direction method of multipliers with partially variable splitting. Performance evaluation of our proposed framework is provided using a discrete-event simulator that is driven by real MNO deployment scenarios based on over 400 base station locations deployed by two primary cellular operators in the city of Dublin. Numerical results show that our proposed frameworks can almost double the capacity for all supported services for each MNO in an urban setting.