A distributed SON-based user-centric backhaul provisioning scheme

Jaber, M., Imran, M. A. , Tafazolli, R. and Tukmanov, A. (2016) A distributed SON-based user-centric backhaul provisioning scheme. IEEE Access, 4, pp. 2314-2330. (doi:10.1109/ACCESS.2016.2566958)

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Abstract

5G definition and standardization projects are well underway, and governing characteristics and major challenges have been identified. A critical network element impacting the potential performance of 5G networks is the backhaul, which is expected to expand in length and breadth to cater to the exponential growth of small cells while offering high throughput in the order of gigabit per second and less than 1 ms latency with high resilience and energy efficiency. Such performance may only be possible with direct optical fiber connections that are often not available country-wide and are cumbersome and expensive to deploy. On the other hand, a prime 5G characteristic is diversity, which describes the radio access network, the backhaul, and also the types of user applications and devices. Thus, we propose a novel, distributed, self-optimized, end-to-end user-cell-backhaul association scheme that intelligently associates users with candidate cells based on corresponding dynamic radio and backhaul conditions while abiding by users' requirements. Radio cells broadcast multiple bias factors, each reflecting a dynamic performance indicator (DPI) of the end-to-end network performance such as capacity, latency, resilience, energy consumption, and so on. A given user would employ these factors to derive a user-centric cell ranking that motivates it to select the cell with radio and backhaul performance that conforms to the user requirements. Reinforcement learning is used at the radio cells to optimise the bias factors for each DPI in a way that maximise the system throughput while minimising the gap between the users' achievable and required end-to-end quality of experience (QoE). Preliminary results show considerable improvement in users' QoE and cumulative system throughput when compared with the state-of-the-art user-cell association schemes.

Item Type:Articles
Additional Information:This work was supported by the U.K. Engineering and Physical Science Research Council and the BT Research and Innovation through the Industrial Cooperative Awards in Science and Technology Studentship.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Jaber, M., Imran, M. A., Tafazolli, R., and Tukmanov, A.
College/School:College of Science and Engineering > School of Engineering
Journal Name:IEEE Access
Publisher:IEEE
ISSN:2169-3536
ISSN (Online):2169-3536
Copyright Holders:Copyright © 2016 IEEE
First Published:First published in IEEE Access 4: 2314-2330
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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