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Dynamic application placement in the Mobile Cloud Network
Umeå University, Faculty of Science and Technology, Department of Computing Science. (Distributed Systems)
Umeå University, Faculty of Science and Technology, Department of Computing Science.
Umeå University, Faculty of Science and Technology, Department of Computing Science. (Distributed Systems)
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2017 (English)In: Future generations computer systems, ISSN 0167-739X, E-ISSN 1872-7115, Vol. 70, p. 163-177Article in journal (Refereed) Published
Abstract [en]

To meet the challenges of consistent performance, low communication latency, and a high degree of user mobility, cloud and Telecom infrastructure vendors and operators foresee a Mobile Cloud Network that incorporates public cloud infrastructures with cloud augmented Telecom nodes in forthcoming mobile access networks. A Mobile Cloud Network is composed of distributed cost- and capacityheterogeneous resources that host applications that in turn are subject to a spatially and quantitatively rapidly changing demand. Such an infrastructure requires a holistic management approach that ensures that the resident applications’ performance requirements are met while sustainably supported by the underlying infrastructure. The contribution of this paper is three-fold. Firstly, this paper contributes with a model that captures the cost- and capacity-heterogeneity of a Mobile Cloud Network infrastructure. The model bridges the Mobile Edge Computing and Distributed Cloud paradigms by modelling multiple tiers of resources across the network and serves not just mobile devices but any client beyond and within the network. A set of resource management challenges is presented based on this model. Secondly, an algorithm that holistically and optimally solves these challenges is proposed. The algorithm is formulated as an application placement method that incorporates aspects of network link capacity, desired user latency and user mobility, as well as data centre resource utilisation and server provisioning costs. Thirdly, to address scalability, a tractable locally optimal algorithm is presented. The evaluation demonstrates that the placement algorithm significantly improves latency, resource utilisation skewness while minimising the operational cost of the system. Additionally, the proposed model and evaluation method demonstrate the viability of dynamic resource management of the Mobile Cloud Network and the need for accommodating rapidly mobile demand in a holistic manner.

Place, publisher, year, edition, pages
2017. Vol. 70, p. 163-177
Keywords [en]
Cloud computing, Distributed, Edge, Graph, Infrastructure, Mobile, Mobile Cloud, Modelling, Networks, Optimisation, Placement, Telco-cloud
National Category
Communication Systems Computer Engineering
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:umu:diva-129247DOI: 10.1016/j.future.2016.06.021ISI: 000394401800015Scopus ID: 2-s2.0-85006970632OAI: oai:DiVA.org:umu-129247DiVA, id: diva2:1058775
Available from: 2016-12-21 Created: 2016-12-21 Last updated: 2018-09-04Bibliographically approved
In thesis
1. Resource allocation for Mobile Edge Clouds
Open this publication in new window or tab >>Resource allocation for Mobile Edge Clouds
2018 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Recent advances in Internet technologies have led to the proliferation of new distributed applications in the transportation, healthcare, mining, security, and entertainment sectors. The emerging applications have characteristics such as being bandwidth-hungry, latency-critical, and applications with a user population contained within a limited geographical area, and require high availability, low jitter, and security.

One way of addressing the challenges arising because of these emerging applications, is to move the computing capabilities closer to the end-users, at the logical edge of a network, in order to improve the performance, operating cost, and reliability of applications and services. These distributed new resources and software stacks, situated on the path between today's centralized data centers and devices in close proximity to the last mile network, are known as Mobile Edge Clouds (MECs). The distributed MECs provides new opportunities for the management of compute resources and the allocation of applications to those resources in order to minimize the overall cost of application deployment while satisfying end-user demands in terms of application performance.

However, these opportunities also present three significant challenges. The first challenge is where and how much computing resources to deploy along the path between today's centralized data centers and devices for cost-optimal operations. The second challenge is where and how much resources should be allocated to which applications to meet the applications' performance requirements while minimizing operational costs. The third challenge is how to provide a framework for application deployment on resource-constrained IoT devices in heterogeneous environments. 

This thesis addresses the above challenges by proposing several models, algorithms, and simulation and software frameworks. In the first part, we investigate methods for early detection of short-lived and significant increase in demand for computing resources (also called spikes) which may cause significant degradation in the performance of a distributed application. We make use of adaptive signal processing techniques for early detection of spikes. We then consider trade-offs between parameters such as the time taken to detect a spike and the number of false spikes that are detected. In the second part, we study the resource planning problem where we study the cost benefits of adding new compute resources based on performance requirements for emerging applications. In the third part, we study the problem of allocating resources to applications by formulating as an optimization problem, where the objective is to minimize overall operational cost while meeting the performance targets of applications. We also propose a hierarchical scheduling framework and policies for allocating resources to applications based on performance metrics of both applications and compute resources. In the last part, we propose a framework, Calvin Constrained, for resource-constrained devices, which is an extension of the Calvin framework and supports a limited but essential subset of the features of the reference framework taking into account the limited memory and processing power of the resource-constrained IoT devices.

Place, publisher, year, edition, pages
Umeå: Umeå University, 2018. p. 30
Series
Report / UMINF, ISSN 0348-0542 ; 18.10
Keywords
Mobile Edge Clouds, Edge/Fog Computing, IoTs, Distributed Resource Allocation
National Category
Computer Systems
Research subject
Computer Science; Computer Systems
Identifiers
urn:nbn:se:umu:diva-151480 (URN)978-91-7601-925-2 (ISBN)
Public defence
2018-10-01, MA121, MIT-huset, Umeå, 13:30 (English)
Opponent
Supervisors
Available from: 2018-09-10 Created: 2018-09-04 Last updated: 2018-09-07Bibliographically approved

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Mehta, AmardeepWadbro, EddieTordsson, JohanElmroth, Erik

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