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Software-Based Implementation of LTE/Wi-Fi Aggregation and Its Impact on Higher Layer Protocols
Publication Type:
Conference/Workshop Paper
Venue:
IEEE International Conference on Communications
Abstract
Due to the fast growing of data consumed in mobile
devices through cellular networks, solutions that provide higher
data rates are an important target for the mobile networking
community. One such solution is the aggregation of mobile
technologies (most commonly LTE) with wireless LAN solutions
(most commonly Wi-Fi). Seeing its potential impact, 3GPP has
devised the LTE/Wi-Fi Aggregation (LWA) specification, which
defines a tight coupling between eNBs and Wi-Fi Access Points
(APs). In this paper, we implement and evaluate an LWA solution,
and compare its performance to the one for full offloading
(only Wi-Fi) and no offloading (only LTE) through physical
experimentation. The developed prototype LWA solution is based
on open source and commodity hardware, which promises a
low-cost and easily implementable LWA solution. Aggregation
and offloading process are managed by the eNB, therefore, the
core network remains intact without any modification. Physical
experiments are done to detail the network performances for
all these three policies for TCP and UDP traffic and both for
uplink and downlink connections. In TCP transmissions with
LWA policy, the different delays between Wi-Fi and LTE links
causes the performance degradation because of the out-of-order
arrivals of the segments. For this, we evaluate a solution where
an artificial delay is added to reduce the number of out-of-order
packets.
Bibtex
@inproceedings{Ibarra5841,
author = {Diego Ibarra and Nitin Desai and Ilker Demirkol},
title = {Software-Based Implementation of LTE/Wi-Fi Aggregation and Its Impact on Higher Layer Protocols},
editor = {IEEE},
month = {June},
year = {2018},
booktitle = {IEEE International Conference on Communications},
url = {http://www.es.mdu.se/publications/5841-}
}