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In Wireless Sensor Networks (WSNs), because sensor nodes do not equip with tamper resistance hardwares, they are vulnerable to the capture and compromise performed by the adversary. By launching the node replication attack, the adversary can place the replicas of captured sensor nodes back into the sensor networks so as to eavesdrop the transmitted messages or compromise the functionality of the network...
Proximity awareness, the ability to actively (or passively) and continuously search for relevant value in one's physical proximity, is at the core of mobile revolution that is changing the way we interact with people and things around us. Especially, Device-to-Device (D2D) (peer-to-peer (P2P)) solutions support infrastructure-free and self-organized proximity services, and have great commercial potential...
The Ubiquitous computing, such as cloud computing, is now more and more popular in the world and there are more and more related applications, especially for Android system, that are developing. The Android system, based on the Linux, is developed by Open Handset Alliance (OHA), organized by Google. The advantage of the Android system is that different corporations, such as hardware and software corporations,...
This article introduces the implementation of serial communication link reuse, between the Internet of the Things devices and wireless communication module, and presents a new implementation. Through the pseudo-terminal functions of Linux system, the new method implies a serial communication link multiplexing layer between the Internet of the Things devices and wireless communication module. Compared...
Cardiovascular diseases are the most popular cause of death in the world recently. For postoperatives, cardiac rehabilitation is still asked to maintain at home (phase II) to improve cardiac function. However, only one third of outpatients do the exercise regularly, reflecting the difficulty for home-based healthcare: lacking of monitoring and motivation. Hence, a cardio-pulmonary rehabilitation system...
In most mobile-assisted localization schemes, mobile anchors follow predefined or random trajectories to send beacon messages around. Although working well in regular and uniform networks, predefined or random trajectories lead to wasted efforts in irregular and non-uniform deployment. We propose a novel scheme of trajectory design by utilizing the topology information of the network. Based on rigidity...
In accordance with systematic structure and function, this thesis analyzes the factors causing electromagnetic interference and the principal transmitting ways of EMI. Based on which, together with a combination of the shielding skill and ESD protection skill, detailed hardware design and anti-interference measures are given.
In order to improve the system performance, the cooperative diversity technology only needs a few changes in system hardware which has been adopted to obtain the diversity gains in mobile satellite communication system. First, the feasibility of cooperative diversity in mobile satellite communication system was analyzed. Second, a simple model of cooperative diversity in mobile satellite communication...
We propose a new framework called dynamic adaptive quality of service (DAQoS) to guarantee the quality of service (QoS) of multimedia traffic generally classified as Constant Bandwidth Service (CBS) and variable Bandwidth Service (VBS). DAQos implements a traffic-based admission control, bandwidth reallocation and reservation schemes to support multimedia traffics. The objectives that DAQoS framework...
A high-speed and dynamic reconfigurable hardware architecture of A5 algorithm is presented, which can satisfy the different characteristic of A5/1 and A5/2 algorithm. To save the hardware cost and get shorter critical path, we proposed reconfigurable clock controlling unit and output function, which can be reconfigured to realize the critical function of two algorithms. As to the different high-speed...
A novel broadband omnidirectional antenna is presented in this paper. The antenna is proposed for operating at mobile telephone bands. To achieve simple structure, the proposed antenna is composed of three monopoles in a plane. The impedance matching and bandwidth for the presented antenna are mainly affected by length and separation of the three monopoles. The theory of basic three monopoles antenna...
There are many incompatible wireless systems. How to integrate them has become an important issue. The integration should be done in both radio access networks (RANs) and core networks. As that in reconfigurable radio, in this paper we propose a reconfigurable architecture in which different protocols can be used in core networks dynamically. More specifically, we consider reconfigurable mobility...
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