Final specification of the Smart AP solutions

This deliverable presents the final version of the specification for the mechanisms included in the Wi-5 Access Points (APs), which have been developed within WP3 of the Wi-5 project. Coordinated by a controller, these APs are able to run the Smart Access Point Solutions including resource management algorithms such as dynamic channel allocation, load balancing and power control. The seamless handover is also an important functionality to support this and the integration with the coordination entities of the Wi-5 architecture (i.e., the Wi-5 controller) and the interface with performance monitoring mechanisms are also defined. The document also includes a series of simulations aimed at studying the possibility of performing a centrally controlled coordination of the frame aggregation functionalities available in 802.11n and 802.11ac. The main section of this deliverable (section 4) is devoted to explaining the final version of the functionalities enabling all the Wi-5 features, with detailed information about their implementation, and the advances with respect to previous versions reported in Deliverables D3.2 and D3.3. These functions rely on the monitoring mechanisms defined in Deliverable D3.1. This section includes a) The framework used for the implementation based on the use of Light Virtual APs (LVAPs). b) The horizontal handover scheme, integrating multi-channel APs with the LVAPs approach, which includes extensive tests of the handover latency illustrating that they can really be seamless. c) Different applications including Channel Assignment, Mobility Management (in a reactive and a proactive way), and Load Balancing based on Received Signal (RSSI), Fittingness Factor and also considering the services being run in the terminals. Another section (section 5) details the results of a battery of measurements of the delays incurred by the system. Finally, a simulation environment is used in order to test different ways of performing a coordinated control of the frame aggregation mechanisms of 802.11. A Conclusions section surveys the work that has been carried out. The most innovative aspects are: a) The development of a method able to proactively manage the mobility of the users, also combining this with load balancing in real time. b) The proposal of central coordination for frame aggregation, which can provide a significant improvement in efficiency while still respecting the real-time requirements

Wi-5: A Programming Architecture for Unlicensed Frequency Bands

We present Wi-5, a spectrum programming architecture for radio resource management in unlicensed frequency bands. It introduces a spectrum control plane that offers fine grained allocation of radio resources, flexible configuration of radio and wireless networking parameters, and continuous monitoring of the wireless network status. These features, along with the centralized nature of this architecture, can effectively address spectrum congestion which often occurs in unlicensed frequency bands. To demonstrate Wi-5’s capabilities, we show results obtained from emulating various use case scenarios on our open source proof-of-concept

Validation platform implementation description - D5.2

This deliverable describes different test-beds for the validation of the architecture, algorithms and protocols for the operator governed opportunistic networking as defined in the OneFIT Project. Further on, this deliverable provides a description of the implementation of the OneFIT cognitive management systems CSCI and CMON as well as the C4MS protocol. Also, implementation of the blocks supporting the OneFIT system (JRRM, CCM, DSONPM, and DSM) is described. This document also describes the implementation of the OneFIT scenarios for opportunistic coverage extension, opportunistic capacity extension, infrastructure supported ad-hoc networking and device-to-device communication as well as opportunistic resource aggregation in the backhaul network

Results analysis and validation - D5.3

This deliverable describes the validation processes followed to assess the performance of the algorithms and protocols for the operator governed opportunistic networking as defined in the OneFIT Project. Therefore, this document includes the description of the set-up of the different validation platforms, the design of the test plans for each one of them, and the analysis of the results obtained from the tests. A per-scenario approach rather than a per-platform approach has been followed, so an additional analysis has been performed, gathering the results related to each scenario, in order to validate the premises stated to each one of them. The OneFIT concept has been therefore validated for all foreseen business scenarios

Chromophore aggregation and photoinduced dichroism in sol-gel films

Photoinduced dichroism (PID) and UV-visible spectroscopic studies have been performed in silica-based thin films prepared by the sol-gel technique, containing Disperse Red 1 (DR1) as trans-cis photoisomerizable chromophore and carbazole as a plasticizer. The absorbances parallel and perpendicular to the induced anisotropy axis, A∥ and A⊥, have been monitored during illumination. Some of the samples show an increase of the average absorbance T0 = (A∥ + 2A⊥)/3 over the initial value. This effect can be interpreted by the presence of aggregates of DR1 molecules, breaking down during illumination and increasing the absorption at the probe wavelength. The formation of the aggregates is evidenced by a blue-shift in the absorption spectra. The carbazole apolar group acts as spacers between the DR1 molecules, effectively avoiding the formation of aggregates. Model equations have been proposed to describe the kinetics of the system and the initial PID data have been fitted by using a simple phenomenological model. © 2007 Elsevier B.V. All rights reserved

Desferrioxamine inhibits induced erythroid differentiation of human leukemic K-562 cells

The iron chelator desferrioxamine reversibly inhibits heme accumulation and globin synthesis in human leukemic K-562 cells induced to express erythroid genes by butyric acid. These results suggest that iron metabolism can modulate globin gene expression. In addition we describe experimental conditions (6.25 μg/ml desferrioxamine) which do not suppress transcription of globin genes and translation of globin mRNA but prevent heme synthesis. Therefore expression of globin genes in butyric acid induced K-562 cells does not require accumulation of heme molecules. Human leukemic K-562 cells cultured with different inducers and treated with desferrioxamine should be used as a useful model system to further analyse the relationship between expression of erythroid genes, iron metabolism and heme accumulation. © 1983