NDLI: Traffic adaptation and energy saving potential of centralized radio access networks with coordinated resource allocation and consolidation

Content Provider	IEEE Xplore Digital Library
Author	Dalin Zhu Ming Lei
Copyright Year	2013
Description	Author affiliation: Dept. of Wireless Commun., NEC Labs. China (NLC), Beijing, China (Dalin Zhu; Ming Lei)
Abstract	In this paper, we investigate traffic adaptation and energy saving potential of centralized radio access networks (C-RAN) with coordinated resource allocation and consolidation (CoRAC). The proposed CoRAC scheme comprises dynamic base-band unit-remote radio unit (BBU-RRU) mapping and cooperative dynamic downlink/uplink (DL/UL) reconfiguration. Specifically, in our proposed scheme, the logical connections between BBUs and RRUs are adaptively adjusted according the the traffic condition and interference patterns. Cell clusters are correspondingly formed, on which the developed cooperative reconfiguration method is conducted. With this setup,, the DL/UL configurations are no longer determined with respect to an individual cell, but are chosen in form of the cluster-specific configuration patterns (CPs) with optimized performance metrics. Our proposed CoRAC scheme is custom designed for time-division duplex (TDD) systems aiming at (1) asymmetric traffic adaptation with load balancing; and (2) cross-subframe co-channel interference (CCI) management. In addition to (1) and (2), the CoRAC is beneficial from the perspective of network energy savings. This is because by shutting down under-utilized BBUs and selecting appropriate DL/UL configurations for traffic adaptation, the power consumption of both BBUs and RRUs (in terms of per-subframe radiated transmission power) can be reduced. System level evaluation results are provided, which show that by employing our proposed scheme, remarkable performance improvements can be obtained relative to the existing methods, in terms of the packet throughput, traffic adaptation and power consumption.
Starting Page	587
Ending Page	593
File Size	1913251
Page Count	7
File Format	PDF
ISBN	9781479914067
DOI	10.1109/ChinaCom.2013.6694662
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-08-14
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fluctuations Clustering algorithms Optical fiber networks Bismuth NIST Throughput Radio access networks
Content Type	Text
Resource Type	Article

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