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Dynamic resource allocation for virtualized wireless networks in massive-MIMO-aided and Front-haul-Limited C-RAN

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posted on 27.06.2017, 09:08 by Saeedeh Parsaeefard, Rajesh Dawadi, Mahsa DerakhshaniMahsa Derakhshani, Tho Le-Ngoc, Mina Baghani
This work considers the uplink dynamic resource allocation in a cloud radio access network (C-RAN) serving users belonging to different service providers (called slices) to form virtualized wireless networks (VWN). In particular, the C-RAN supports a pool of base-station (BS) baseband units (BBUs), which are connected to BS radio remote heads (RRHs) equipped with massive MIMO, via fronthaul links with limited capacity. Assuming that each user can be assigned to a single RRH-BBU pair, we formulate a resource allocation problem aiming to maximize the total system rate, constrained on the minimum rates required by the slices and the maximum number of antennas and power allocated to each user. The effects of pilot contamination error on the VWN performance are investigated and pilot duration is considered as a new optimization variable in resource allocation. This problem is inherently non-convex, NP-hard and thus computationally inefficient. By applying the successive convex approximation (SCA) and complementary geometric programming (CGP) approach, we propose a twostep iterative algorithm: one to adjust the RRH, BBU, and fronthaul parameters, and the other for power and antenna allocation to users. Simulation results illustrate the performance of the developed algorithm for VWNs in a massive-MIMO-aided and fronthaul-limited C-RAN, and demonstrate the effects of imperfect CSI estimation due to pilot contamination error, and the optimal pilot duration.

Funding

This work was supported in part by a Natural Sciences and Engineering Research Council of Canada (NSERC) Collaborative RD Grant with Huawei Technologies Canada, and by Project 907950200 in ITRC.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Transactions on Vehicular Technology

Volume

66

Issue

10

Citation

PARSAEEFARD, S. ...et al., 2017. Dynamic resource allocation for virtualized wireless networks in massive-MIMO-aided and Front-haul-Limited C-RAN. IEEE Transactions on Vehicular Technology, 66 (10), pp. 9512-9520.

Publisher

© IEEE

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

22/05/2017

Publication date

2017-06-06

Notes

(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

ISSN

0018-9545

Language

en