NDLI: A Dynamic Flow Control Algorithm for LTE-Advanced Relay Networks

Content Provider	IEEE Xplore Digital Library
Author	Ping-Chen Lin Ray-Guang Cheng Yu-Jen Chang
Copyright Year	1967
Abstract	Relay technology is a candidate for extending the coverage or enhancing the throughput of next-generation cellular systems. In the downlink of a Long Term Evolution Advanced (LTE-A) relay network, a relay node (RN) normally reserves a small buffer for each user equipment (UE) such that the RN can minimize the number of forwarding packets during UE handover. The small buffer and a mismatch of the data rates between the access link and the relay link may result in buffer overflow for some UE and in buffer underflow for the other UE served by the same RN. This paper presents a simple analytical model to illustrate the buffer-overflow and buffer-underflow problems in the downlink of an LTE-A relay network. A dynamic flow control algorithm (DFCA) is then proposed to minimize the buffer-overflow and buffer-underflow probabilities. The proposed DFCA is designed to minimize the feedback signaling overhead by dynamically adjusting the window size and the feedback frequency based on the relevant measures obtained from individual UE. Simulation results showed that most of the flow control schemes can effectively prevent the buffer-overflow problem. However, only DFCA can provide lower buffer-underflow probabilities and higher throughput for most UEs versus what the other flow control schemes can do.
Sponsorship	IEEE Vehicular Technology Society
Starting Page	334
Ending Page	343
Page Count	10
File Size	1341986
File Format	PDF
ISSN	00189545
Volume Number	63
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Signal to noise ratio Bandwidth Heuristic algorithms Downlink Throughput Uplink Long Term Evolution-Advanced (LTE-A) relay networks Buffer-underflow/-overflow probability dynamic flow control algorithm (DFCA)
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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