Proceedings ArticleDOI
Network function placement on virtualized cellular cores
David Dietrich,Chrysa Papagianni,Panagiotis Papadimitriou,John S. Baras +3 more
- pp 259-266
TLDR
A linear programming (LP) formulation for the computation of NF placements that strikes a balance between optimality and time complexity is presented and results show that the LP achieves significantly better load balancing, request acceptance rate, and resource utilization compared to a greedy algorithm that performs NF placement inline with carriers' common practice today.Abstract:
The proliferation of mobiles devices, application sprawl, and the ever-increasing data volume generates significant stress on cellular networks and particularly on the cellular core, also known as the Evolved Packet Core (EPC). This is further exacerbated by the deployment of hardware appliances for the implementation of a wide range of network functions (e.g., gateways, mobility management, firewalls, network address translation), hindering any opportunity for elastic provisioning, and eventually leading to high operational costs and a significant degree of load imbalance across the EPC. Network Function Virtualization (NFV) has been seen a promising solution in order to enable elasticity in the cellular core. Applying NFV to the EPC raises the need for network function (NF) placement, which in turn entails significant challenges, due to the stringent delay budgets among cellular core components and the coexistence of communicating data and control plane elements. To address these challenges, we present a linear programming (LP) formulation for the computation of NF placements that strikes a balance between optimality and time complexity. Our evaluation results show that the LP achieves significantly better load balancing, request acceptance rate, and resource utilization compared to a greedy algorithm that performs NF placement inline with carriers' common practice today.read more
Citations
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Journal ArticleDOI
A Survey on the Placement of Virtual Resources and Virtual Network Functions
TL;DR: A classification of V NF placement approaches is proposed, first, regarding the general placement and management issues of VNFs, and second, based on the target VNF type.
Proceedings ArticleDOI
Joint VNF Placement and CPU Allocation in 5G
TL;DR: A queuing-based system model is presented, accounting for all the entities involved in 5G networks, and it is found to consistently outperform state-of-the-art alternatives and closely match the optimum.
Journal ArticleDOI
VNF Placement and Resource Allocation for the Support of Vertical Services in 5G Networks
TL;DR: In this paper, the authors propose a queuing-based model and use it at the network orchestrator to optimally match the vertical's requirements to the available system resources, which allows to reduce the solution complexity.
Proceedings ArticleDOI
Towards Secure Slicing: Using Slice Isolation to Mitigate DDoS Attacks on 5G Core Network Slices
Danish Sattar,Ashraf Matrawy +1 more
TL;DR: The use of a mathematical model that can provide on-demand slice isolation as well as guarantee end-to-end delay for 5G core network slices is proposed to mitigate Distributed Denial-of-Service attacks in 5G network slicing.
Journal ArticleDOI
Delay-Aware Virtual Network Function Placement and Routing in Edge Clouds
TL;DR: This paper studies the problem of how to place VNFs on edge and public clouds and route the traffic among adjacent VNF pairs, such that the maximum link load ratio is minimized and each user's requested delay is satisfied and an efficient randomized rounding approximation algorithm is proposed.
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Proceedings ArticleDOI
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