European Wireless Conference 

About: European Wireless Conference is an academic conference. The conference publishes majorly in the area(s): MIMO & Wireless network. Over the lifetime, 928 publications have been published by the conference receiving 11149 citations.

LTE-Advanced: Heterogeneous networks

Abstract: Long-Term Evolution (LTE) allows operators to use new and wider spectrum and complements 3G networks with higher data rates, lower latency and a flat IP-based architecture. To further improve broadband user experience in a ubiquitous and cost effective manner, 3GPP has been working on various aspects in the framework of LTE Advanced. Since radio link performance is approaching theoretical limits with 3G enhancements and LTE, the next performance leap in wireless networks will come from the network topology. LTE Advanced is about improving spectral efficiency per unit area. Using a mix of macro, pico, femto and relay base-stations, heterogeneous networks enable flexible and low-cost deployments and provide a uniform broadband experience to users anywhere in the network. This paper discusses the need for an alternative deployment model or topology using heterogeneous networks. To enhance the performance of these networks, advanced techniques are described which are needed to manage and control interference and deliver the full benefits of such networks. Range extension allows more user terminals to benefit directly from low-power base-stations such as picos, femtos, and relays. Adaptive inter-cell interference coordination provides smart resource allocation amongst interfering cells and improves inter-cell fairness in a heterogeneous network. In addition, the performance gains with heterogeneous networks using an example macro/pico network are shown.

Analysis of Capacity and Scalability of the LoRa Low Power Wide Area Network Technology

Abstract: In this paper we discuss and analyze the recently proposed LoRa low power wide area network (LPWAN) technology when used under the European frequency regulations First of all, we derive the performance metrics of a single LoRaWAN end device, namely uplink throughput and data transmission time Then we analyze for several illustrative application scenarios the maximum number of end devices which can be served by a single LoRaWAN base station and discuss the spatial distribution of these devices It is shown that subject to the channel composition and application requirements, a single cell may include several millions of devices Also, we show that the capacity of the uplink channel available to a LoRaWAN node strongly depends on the distance from the base station and does not exceed 2 kbit/s In the concluding section we summarize and discuss the obtained results, and point out few issues which need to be taken into account when making an application using LoRa or deploying a LoRa network

Analysis and performance evaluation of the OFDM-based metropolitan area network IEEE 802.16

Abstract: Wireless last mile technology is becoming a challenging competitor to conventional wired last mile access systems like DSL and cable modems or even fiber-optic cables. The Institute of Electrical and Electronics Engineers has developed a standard for fixed broadband wireless access systems namely IEEE 802.16. Its OFDM mode targets frequency bands below 11GHz. This paper gives an overview of the OFDM-based transmission mode of the IEEE 802.16 standard. The medium access control (MAC) and the physical layer are described in detail. Especially the MAC frame structure is elaborated. An analytical performance evaluation of an example scenario is performed which results in overall system performance measures. Especially the interaction of fragmentation and padding of OFDM symbols and its effect on the system capacity is evaluated. Furthermore, different MAC layer configurations with different levels of robustness are analyzed. Optional features to resist challenging channel conditions are outlined. Their trade off, i.e., a reduced MAC layer capacity is pointed out. It is shown that the system can be optimized while maintaining the necessary robustness against environmental challenges. A prototypical IEEE 802.16 protocol stack including a sophisticated channel model has been implemented. By means of this stochastic event-driven computer simulator, downlink and uplink delay as well as throughput evaluation is performed. Thus, performance results based on meaningful MAC configuration examples are provided. Simulative and analytical results are compared.

Network slicing management & prioritization in 5G mobile systems

Abstract: 5G mobile network is expected to serve flexible requirements hence dynamically allocate network resources according to the demands. Network slicing, where network resources are packaged and assigned in an isolated manner to set of users according to their specific requirements, is considered as a key paradigm to fulfil diversity of requirements. There will clearly be conflicting demands in allocation of such slices, and the effective provisioning of network slicing poses several challenges. Indeed, network slicing has a twofold impact in terms of user/traffic prioritization as it dictates for the simultaneous management of the priority among different slices (i.e., interslice) and the priority among the users belonging to the same slice (i.e., intra-slice). In this paper, we propose a novel heuristicbased admission control mechanism able to dynamically allocate network resources to different slices in order to maximize the satisfaction of the users while guaranteeing to meet the requirements of the slices they belong to. Through simulations, we demonstrate how our proposal provides (i) higher user experience in individual slices, (ii) increased utilization of network resources and (iii) higher scalability when the number of users in each slice increases.

Does BTLE measure up against WiFi? A comparison of indoor location performance

Abstract: Bluetooth low energy(BTLE) is an emerging lowpower wireless communication technology which is expected to be of great potential in the next few years. In this paper, we propose several empirical propagation models for BTLE in different conditions: indoor/outdoor, line-of-sight (LOS) / non-line-of-sight (NLOS). Then we compare the propagation characteristics between BTLE and WiFi. It is demonstrated in our experiments that BTLE propagation model can better relate RSSI to range than WiFi, which indicates that BTLE can be more accurate when used in localization scenarios. Extensive experiments in indoor environments have been conducted to explicitly compare the localization accuracy between BTLE and WiFi with nearly identical external environments and conditions. BTLE is proved to be more accurate than WiFi by around 27 percent. We also discuss various underlying reasons why BTLE outperforms WiFi in localization scenarios. We believe that such an accurate and low-cost technique will enable practical and ubiquitous indoor localization.