VM Migration in Mobile Edge Computing for QoS Improvement with Wireless Multi-Hop Access Networks
VM Migration in Mobile Edge Computing for QoS Improvement with Wireless Multi-Hop Access Networks
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DOI：
10.1145/3164541.3164552
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发表时间：
2018-01
期刊：
影响因子：
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通讯作者：
Jun Kikuchi;Celimuge Wu;Yusheng Ji;T. Murase
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文献类型：
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作者：
Jun Kikuchi;Celimuge Wu;Yusheng Ji;T. Murase
在移动的边缘计算（MEC）的边缘节点中运行的服务质量（QoS）应用可能由于无线接入的拥塞或移动的边缘计算资源的短缺而降级。为了提高服务质量，如TCP吞吐量，我们提出了一种虚拟机（VM）迁移方法，它需要一个虚拟机从一个拥塞的节点到另一个节点在一个移动的边缘。我们还提出了一种方法，其中无线局域网接入点（AP）被用作MEC的边缘，以获得高吞吐量的VM迁移方法。更具体地，取决于估计的吞吐量，VM被迁移到蜂窝基站（BS）站点处或无线LAN AP站点处的边缘节点。当用户设备和新的边缘节点之间的物理距离较大时，在它们之间利用多跳自组织网络。在这种情况下，吞吐量受到中继设备产生的后台业务的影响。将使用具有大量TCP连接作为后台流量的评估模型来调查VM迁移前后的吞吐量。用户可以选择是继续与附近但拥塞的节点通信，还是将VM迁移到较远但不那么拥塞的节点。评估结果表明，虚拟机迁移到边缘服务器在BS站点可以提高TCP吞吐量超过60%，即使当中继设备发出一些TCP连接。此外，VM迁移到AP站点可以将TCP吞吐量提高80%以上，即使中继设备发出2个TCP连接。
Quality of Service (QoS) applications running in an edge node of mobile edge computing (MEC) could degrade due to congestion of wireless access or shortage of mobile edge computing resources. To improve QoS, such as TCP throughput, we propose a virtual machine (VM) migration method, which takes a VM from a congested node to another node in a mobile edge. We also propose an approach in which a wireless LAN access point (AP) is employed as an edge of the MEC to obtain high throughput in the VM migration method. More specifically, a VM is migrated to an edge node either at a cellular base station (BS) site or at a wireless LAN AP site depending on the estimated throughput. When the physical distance between a user device and a new edge node is large, a multi-hop ad hoc network is utilized between them. In this case, throughput is affected by background traffic yielded by relay devices. Evaluation models that have a number of TCP connections as background traffic will be used to investigate the throughput before and after the VM migration. Users can choose whether to continue communications with a near but congested node or to conduct a VM migration to a far but less congested node. The evaluation results show that a VM migration to an edge server at a BS site could improve TCP throughput by more than 60%, even when the relay devices emit a few TCP connections. Moreover, a VM migration to an AP site can improve TCP throughput by more than 80%, even when the relay devices emit 2 TCP connections.