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In recent years, interest in Vehicular Ad Hoc Networks (VANETs) research has increased dramatically. This paper investigates the network performance for information dissemination for advertising applications in VANETs. To take on challenges of using broadcasting scheme to disseminate messages at intersection, this paper proposes an Intersection-based Handover (IHO) protocol to increase the message...
Shared-memory multithreaded programs running on chip multiprocessors (CMPs) tend to be nondeterministic. Two-phase deterministic record-replay is an effective approach to solve this nondeterminism. This paper proposes an efficient deterministic record-replay named Fly Replay. During recording, Fly Replay logs not only the right dependencies of memory races but also the pseudo dependencies constituted...
A hospital's mobile nursing cart can collect clinical data via Wi-Fi networks and save data in the server side. This service not only provides better medical care, but also enhances staff productivity. However, the coverage of Wi-Fi is limited and signal dead ends will result in wireless disconnection. This problem can be solved by switching between Wi-Fi and 3G. The physical connection must be disconnected...
Spatial data is a main carrier and media of social information. But the structure and environment also have some interoperability problems. In this paper, we present a framework for integrating heterogeneous spatial information and applications based on multi-agent and web services. A Contract-First agent model is proposed to interact with the data interfaces of different spatial data providers, which...
This paper proposes a network Coding based RETransmission (CoRET) scheme for supporting multicast service in mobile communication networks. CoRET introduces network coding and employs a Hamming distance based packet selection algorithm to select packets for encoding in order to improve the retransmission performance in terms of efficiency and reliability. Simulation results show that CoRET can achieve...
Cooperative diversity is a transmission technique, where multiple users pool their resources to form a virtual antenna array that obtain spatial diversity. We evaluate the performance of coded cooperation with multiple relays in Reyleigh fading channels. The closed-form expressions with multiple relays are derived in this work. Our numerical results show that the new coded cooperation method can achieve...
Resource discovery is one of the key issues in mobile P2P studies. Nonetheless, in existing schemes thereare still some deficiencies, such as the lake of flexibility, proportionality and adaptability. In this paper, we present a resource discovery model Mobile-Tapestry (M-Tapestry) for mobile P2P networks based on the P2P Tapestry strategy. The philosophy of this model is to make the network architecture...
Slow and regular breathing can make beneficial effects on cardiovascular system and autonomic nerve system. Many researches studied the cardiovascular variabilities under paced breathing rate of 0.25 Hz and 0.1 Hz, but few quantitative data are available describing the relationships between the cardiovascular variables during the slow and regular breathing procedure, and mechanism of the beneficial...
Voice restoration techniques for voice communication software are among the most popular for voice communication applications. Previous researches are mainly based on network package analysis, due to the diversity of voice communication software, these methods are just effective for certain kinds of voice communication software and have difficulty in dealing with encrypted voice communication especially...
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