Impact of Offloading on the Efficiency of Wireless Access Networks
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Impact of Offloading on the Efficiency of Wireless Access Networks Adel Agamy1 · Ahmed M. Mohamed1 Received: 6 February 2020 / Revised: 26 August 2020 / Accepted: 26 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Wireless access networks need to deliver a satisfactory level of Quality of Service (QoS) to their subscribers. The service quality can be measured through various metrics, for example the mean packet delay, average throughput, the jitter and bandwidth. Based on the type of network application, one or the other can be more important. Mobile data offloading has a crucial effect on the efficiency of wireless access networks. Offloading decreases the load on mobile networks (LTE) which frees the band to other users and consequently improves the QoS level. Also data offloading reduces the cost of the downloaded information. In this paper we assess the impact of data offloading on the efficiency of wireless access networks. We employ two popular scheduler algorithms to measure the effect of resource allocation among users. In particular, an analytical model for mixed LTE and WiFi access networks is developed. The model takes into account the role and the effect of various application demands. The model evaluates the wireless access networks behavior when some portions of network service zones are tenanted by different application types. Using the real network simulation NS3, the network performance metrics (the average throughput, delay and packet loss) are investigated to evaluate the network performance under diverse traffic loads. Keywords Wireless Access Networks · LTE · WiFi Networks · Traffic Modeling · Performance modeling · Offloading
1 Introduction Networks with diverse access technologies which can deliver a service using a cellular access network and capable of keeping the service when switching to another WiFi access network is called a wireless access networks [40]. The rapid increase in the use of wireless devices results in numerous challenges for wireless access networks design and implementation. Also, the various types of network applications produce different traffic types. Each application generates traffic with different characteristics which leads to different types of traffic in the network. Some applications generate traffic with fixed rate like voice calls; others like video streaming and web browsing generate traffic with variable rate. Applications like files transferring generate traffic with different burst size. These challenges should be considered in the design of the new generation of wireless access networks * Adel Agamy [email protected] Ahmed M. Mohamed [email protected] 1
Electrical Engineering Department, Faculty of Engineering, Aswan University, Aswan, Egypt
due to the constraints on the delay and bandwidth requirements for different network applications [7, 11, 13, 30]. The third Generation Partnership Project (3GPP) presented the LTE characteristics [29], the novel optimized architecture for the radio access
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