2026-04-17T05:15:32Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1232262026-02-06T02:44:46Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Ibarra Gómez, David author Desai, Nitin Pradeep author Demirkol, Ilker Seyfettin author 2018 ©2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. 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. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils Open source software Mobile communication systems Wireless communication systems 4G mobile networks LTE LTE Wi-Fi Aggregation mobile telecommunication systems Open source software Open systems Transmission control protocol Wi-Fi Wireless local area networks (WLAN) 4G mobile networks Higher-layer protocols Out-of-order arrival Out-of-order packets Performance degradation Physical experimentations Physical experiments Wi-fi access points Wireless telecommunication systems Programari lliure Comunicacions mòbils, sistemes de Comunicació sense fil, Sistemes de Software-based implementation of LTE/Wi-Fi aggregation and its impact on higher layer protocols