The vision of future 5G networks encompasses a heterogeneous communication landscape in which existing Radio Access Technologies (RATs) will be integrated with evolving wireless technologies and systems, software-design network architectures and cloud-enabled services. Effectively harnessing the potential of all these innovative and heterogeneous features and providing a programmable multi-tenant network architectural framework will be the key to the success of 5G, and will be the main objective of the 5G-AURA project. Instead of focusing separately on the optimization of the diverse technological and architectural components, our efforts will be concentrated on providing a unifying framework that will sustain the coexistence and coordination of networking, software and cloud technologies, ensure network programmability and efficient resource orchestration, minimize control and signalling overhead, support multi-tenancy and scalability, and promote the development of new business models for emerging services. To efficiently achieve these objectives, 5G-AURA has identified 12 specific research challenges which have been mapped to 14 individual projects that will be carried out by 14 recruited ESRs. The project’s consortium, formed by four academic institutions and four industrial partners, has the necessary expertise and available infrastructures to form a high quality training network across multiple disciplines, sectors and countries. Considering that 5G is currently in an early development state and there are multiple open issues on 5G protocols, network architectures and technologies and standardization efforts, the timing of 5G-AURA is perfect, and the project has a strong potential to have significant impact on academia and industry and enhance the European innovation capacity in terms of technical contributions, intersectoral training of scientists and professional and novel business opportunities.
Today, the vast majority of personal communication devices, such as laptops, smartphones, and logically wireless fidelity (Wi-Fi) access points feature IEEE 802.11 chipsets. In turn, wake-up radio (WuR) systems are used to reduce the significant energy waste that wireless devices cause during their idle communication mode. A novel WuR system is introduced that enables any IEEE 802.11-enabled device to be used as a WuR transmitter without requiring any hardware modification. The corresponding developed WuR receiver achieves a remarkably low power consumption of 10.8 µW and operates in the Wi-Fi 2.4 GHz band. By means of thorough physical tests, it is shown that the proposed IEEE 802.11-based WuR system enables important energy savings.
Wireless Local Area Networks have been increasingly deployed and become very popular. They offer important advantages such as the higher flexibility and user mobility, however, this kind of networks also present some security concerns due to its broadcast nature. Security mechanisms can be classified into two groups: user authentication and data confidentiality.; The IEEE 802.11i specification presents RSNA authentication mechanism, which allows user authentication employing IEEE 802.1x protocol and EAP methods. Authentication mechanisms consist in an important step of the handoff process, which occurs when a mobile node leaves the coverage area of an access point and performs association with another. Handoff results in a critical function for IEEE 802.11 MAC operation due to important delay restrictions. Thus, pre-authentication and IEEE 802.11r mechanisms have been presented to allow important latency reduction, which provide interesting results in real time communications.; Besides, usually, WLAN users employ mobile devices, which provide limited capabilities in terms of energy management.; In this way, in this paper, we evaluate authentication latency and battery consumption by means of an analytical model that we have developed for this purpose. The analysis also includes the influence of transmission errors, which allows the evaluation of authentication mechanisms in error-prone scenarios. (C) 2014 Elsevier B.V. All rights reserved.
Garcia-Villegas, E.; Gomez, M.; Lopez-Aguilera, E.; Casademont, J. International Wireless Communications and Mobile Computing Conference p. 57-61 DOI: 10.1145/1815396.1815410 Presentation of work at congresses
IEEE 802.11 Wireless LANs (WLANs) are highly sensitive to Denial of Service (DoS) attacks carried out with jamming devices. In this paper we focus on 2.4GHz wideband constant jammers. The interest in the wideband jammer lies in the fact that it beats all
possible channels at the same time, leaving no possible escape following traditional channel-switching defenses. After studying
and developing an effective detection mechanism, we propose the implementation of a load balancing technique based on cell
breathing for mitigating the harmful effects of the jammer over an IEEE 802.11 WLAN. Cell breathing is achieved by dynamically tuning the transmission power to adjust the size of a WLAN cell.
Lopez-Aguilera, E.; Heusse, M.; Grunenberger, Y.; Rousseau, F.; Duda, A.; Casademont, J. IEEE transactions on mobile computing Vol. 7, num. 10, p. 1213-1227 Date of publication: 2008-10 Journal article
Since the advent of the first IEEE 802.11 standard, several papers have proposed means of providing QoS to IEEE 802.11 networks and evaluate various traffic-prioritization mechanisms. Nevertheless, studies on the assignment of AIFS times defined in IEEE 802.11e reveal that the various priority levels work in a synchronized manner. The studies show that, under large loads of high-priority traffic, EDCA starves low-priority frames, which is undesirable. We argue that QoS traffic needs to be prioritized, but users sending best-effort frames should also obtain the expected service. High-priority traffic can also suffer performance degradation when using EDCA because of heavy loads of low-priority frames. Thus, we have proposed a mechanism based on desynchronizing the IEEE 802.11e working procedure. It prevents stations that belong to different priority classes from attempting simultaneous transmission, prioritizes independent collision groups and achieves better short-term and long-term channel access fairness. We have evaluated the proposal based on extensive analytical and simulation results. It prevents the strangulation of low-priority traffic, and, moreover, reduces the degradation of high-priority traffic with the increased presence of low-priority frames.
Garcia-Villegas, E.; Lopez-Aguilera, E.; Vidal, R.; Paradells, J. Second International Conference on Cognitive Radio Oriented Wireless Networks and Communications p. 1-8 Presentation of work at congresses
Lopez-Aguilera, E.; Casademont, J.; Cotrina, J.; Rojas, A. IEEE International Symposium on Personal Indoor and Mobile Radio Communications p. 1463-1467 Presentation's date: 2005-09-01 Presentation of work at congresses
Lopez-Aguilera, E.; Casademont, J.; Rojas, A.; Cotrina, J. The IASTED International Conference on Wireless Networks and Emerging Technologies Presentation's date: 2005-07-01 Presentation of work at congresses
At present, there is a growing interest in wireless applications, due to the fact that the technology begins to support them at reasonable costs. In this paper, we present the technology currently available for use in wireless environments, focusing on Geographic Information Systems. As an example, we present a newly developed platform for the commercialization of advanced geographical information services for use in portable devices. This platform uses available mobile telephone networks and wireless local area networks, but it is completely scalable to new technologies such as third generation mobile networks. Users access the service using a vector map player that runs on a Personal Digital Assistant with wireless access facilities and a Global Positioning System receiver. Before accessing the information, the player will request authorization from the server and download the requested map from it, if necessary. The platform also includes a system for improving Global Positioning System localization with the Real Time Differential Global Positioning System, which uses short GSM messages as the transmission medium.