Paper Info
Title
Data-Driven C-RAN Optimization Exploiting Traffic and Mobility Dynamics of Mobile Users
Abstract
The surging traffic volumes and dynamic user mobility patterns pose great challenges for cellular network operators to reduce operational costs and ensure service quality. Cloud-radio access network (C-RAN) aims to address these issues by handling traffic and mobility in a centralized manner, separating baseband units (BBUs) from base stations (RRHs) and sharing BBUs in a pool. The key problem in C-RAN optimization is to dynamically allocate BBUs and map them to RRHs under cost and quality constraints, since real-world traffic and mobility are difficult to predict, and there are enormous numbers of candidate RRH-BBU mapping schemes. In this work, we propose a data-driven framework for C-RAN optimization. First, we propose a deep-learning-based Multivariate long short term memory (MuLSTM) model to capture the spatiotemporal patterns of traffic and mobility for accurate prediction. Second, we formulate RRH-BBU mapping with cost and quality objectives as a set partitioning problem, and propose a resource-constrained label-propagation (RCLP) algorithm to solve it. We show that the greedy RCLP algorithm is monotone suboptimal with worst-case approximation guarantee to optimal. Evaluations with real-world datasets from Ivory Coast and Senegal show that our framework achieves a BBU utilization above 85.2 percent, with over 82.3 percent of mobility events handled with high quality, outperforming the traditional and the state-of-the-art baselines.
Year
DOI
Venue
2021
10.1109/TMC.2020.2971470
IEEE Transactions on Mobile Computing
Keywords
DocType
Volume
Handover,Optimization,Cellular networks,Computer architecture,Mobile computing,Base stations
Journal
20
Issue
ISSN
Citations 
5
1536-1233
1
PageRank 
References 
Authors
0.35
0
6
Name
Order
Citations
PageRank
Longbiao Chen112310.60
Thi Mai Trang Nguyen213919.47
Dingqi Yang354228.79
Michele Nogueira413123.46
Cheng Wang521832.63
Daqing Zhang63619217.31