Abstract
Future public transportation systems will provide broadband access to passengers, carrying legacy terminals with 802.11 connectivity. Passengers will be able to communicate with the Internet and with each other, while connected to 802.11 Access Points deployed in vehicles and bus stops/metro stations, and without requiring special mobility or routing protocols to run in their terminals. Existing solutions, such as 802.11s and OLSR, are not efficient and do not scale to large networks, thereby requiring the network to be segmented in many small areas, causing the terminals to change IP address when moving between areas. This paper presents WiMetroNet, a large mesh network of mobile routers (Rbridges) operating at layer 2.5 over heterogeneous wireless technologies. This architecture contains an efficient user plane that optimizes the transport of DHCP and ARP traffic, and provides a transparent terminal mobility solution using techniques that minimize the routing overhead for large networks. We offer two techniques to reduce routing overhead associated with terminal mobility. One approach is based on TTL-limited flooding of a routing message and on the concept of forwarding packets only to the vicinity of the last known location of the terminal, and then forward the packets to a new location of the terminal. The other technique lets the network remain unaware for a very long time that the terminal has moved; only when packets arrive at the old PoA does the PoA send back a "binding update" message to the correspondent node, to correct the route for future packets for the same terminal. Simulation and analytical results are presented, and the routing protocol is shown to scale to large networks with good user plane results, namely packet delivery rate, delay, and handover interruption time.

Abstract
Interconnection of different access network technologies is an important research topic in mobile telecommunications systems. In this paper, we propose an ns-3 architecture for simulating the interconnection of wireless local area network (WLAN) and Universal Mobile Telecommunications System (UMTS). This architecture is based on the architecture proposed by the Third Generation Partnership Project, being the use of virtual interfaces as its main innovation. In order to demonstrate the value of the proposed simulation framework, we implemented the UMTS and WLAN interconnection considering three joint radio resource management strategies for distributing arriving calls. From the simulations results, we can conclude that the proposed simulation architecture is suitable to test and evaluate performance aspects related to the interconnection and joint management of UMTS and WLAN technologies. Copyright (c) 2012 John Wiley & Sons, Ltd.

Abstract
Nowadays it's common to find the same place covered by multiple access networks. For that reason, mobile terminals are normally equipped with multiple network interfaces, which allow users to take advantage of the heterogeneity of those networks. This paper presents an architecture capable of using, in a simultaneous way, the multiple network interfaces existent in the mobile terminal for accessing a video streaming service. With this goal in mind, a solution on the session layer was developed, allowing the creation of an abstraction layer for the intervening applications. The purposed solution is composed by two modules, responsible for the division and aggregation of the transmitted data through multiple interfaces. The obtained results show that the developed architecture is not only capable of interconnecting two machines through multiple interfaces in a simultaneous way, but it is also capable of processing a video stream division in an intelligent way, accordingly to the network conditions. © 2012 University of Split.

Abstract
A Biomedical Wireless Sensor Network (BWSN) is a special Wireless Sensor Network (WSN) with a small number of nodes designed for medical applications. These networks must ensure that medical data is delivered reliably and efficiently, M order to fulfil a sel of pre-established Quality of Service (QoS) requirements, In this way, the research community have been proposing new solutions to improve QoS in WSN, namely in routing protocols and power consumption efficiency. However, there slid a need for appropriate QoS guaranties ha BWSN. In this paper, possible QoS requirements of BWSN are discussed, together with a framework to automatically evaluate the performance of such QoS techniques. That framework was used together with simulators and operating systems appropriate for WSN, COOJA and Contiki OS, and proved to be a valuable tool for a proper evaluation of QoS parameters and metrics.

Abstract
Endoleaks are one of the major concerns in the long-term follow-up of endovascular aneurysm repair treatment (EVAR). Therefore, periodic monitoring is required to detect eventual damages in an implanted stent-graft. A monitoring system for post EVAR procedure based on inductive-coupling which avoids the need to resorting to more complex biomedical imaging systems is presented here. Endoleaks are detected with capacitive pressure sensors placed in the stent-graft and monitored externally after the measure of the oscillation frequency provided by the LC circuit created by sensors and inductive coupling.

Abstract
The use of textile yarns as data transmission media enables the design of non-obtrusive well-fitting garments as wearable systems. However, textile conductive yarns show impedances higher than those presented by common metal conductors and these values can change with the textile condition and level of stretching, affecting the integrity of the transmitted signal. This work proposes a built-in self-test methodology to test textile yarn interconnections for conventional stuck-at, open and short faults, as well as to verify signal integrity. The test procedure being proposed relies on sampling to generate a digital signal that results from comparing the received signal with pre-defined voltage levels. The obtained signature allows to verify signal integrity parameters: VLmax, VHmin and rise and fall times. Simulation results confirm the validity of the methodology being proposed. © 2012 IEEE.