Statistical multiplexing and traffic shaping games for network slicing

Jiaxiao Zheng, Pablo Caballero, Gustavo De Veciana, Seung Jun Baek, Albert Banchs

    Research output: Contribution to journalArticlepeer-review

    36 Citations (Scopus)

    Abstract

    Next-generation wireless architectures are expected to enable slices of shared wireless infrastructure, which are customized to specific mobile operators/services. Given infrastructure costs and the stochastic nature of mobile services' spatial loads, it is highly desirable to achieve efficient statistical multiplexing among such slices. We study a simple dynamic resource sharing policy, which allocates a 'share' of a pool of (distributed) resources to each slice-share constrained proportionally fair (SCPF). We give a characterization of SCPF's performance gains over static slicing and general processor sharing. We show that higher gains are obtained when a slice's spatial load is more 'imbalanced' than, and/or 'orthogonal' to, the aggregate network load, and that the overall gain across slices is positive. We then address the associated dimensioning problem. Under SCPF, traditional network dimensioning translates to a coupled share dimensioning problem, which characterizes the existence of a feasible share allocation, given slices' expected loads and performance requirements. We provide a solution to robust share dimensioning for SCPF-based network slicing. Slices may wish to unilaterally manage their users' performance via admission control, which maximizes their carried loads subject to performance requirements. We show that this can be modeled as a 'traffic shaping' game with an achievable Nash equilibrium. Under high loads, the equilibrium is explicitly characterized, as are the gains in the carried load under SCPF versus static slicing. Detailed simulations of a wireless infrastructure supporting multiple slices with heterogeneous mobile loads show the fidelity of our models and the range of validity of our high-load equilibrium analysis.

    Original languageEnglish
    Article number8478215
    Pages (from-to)2528-2541
    Number of pages14
    JournalIEEE/ACM Transactions on Networking
    Volume26
    Issue number6
    DOIs
    Publication statusPublished - 2018 Dec

    Bibliographical note

    Publisher Copyright:
    © 1993-2012 IEEE.

    Keywords

    • RAN-sharing
    • Wireless networks
    • multiplexing
    • network slicing
    • resource allocation
    • traffic shaping

    ASJC Scopus subject areas

    • Software
    • Computer Science Applications
    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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