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In this paper, we consider an application-driven beamforming control for video streaming in multi-antenna interference networks. The optimization objectives for video streaming are the application level performance metrics, namely the playback interruption cost and buffer overflow cost. Using heavy traffic approximation technique, we first derive the diffusion limit for the discrete time queueing...
A wireless sub-mm3 FBAR-based mass sensor fully integrated in a hermetic package is demonstrated. We propose a wafer-scale commercially viable manufacturing process for the integration of the sensor and the interface circuitry. The drift in frequency of the FBAR sensor due to temperature, aging and stress is reduced by a factor of 10 through an integrated differential measurement. The sensor achieves...
Recent advances in ultra-low power chip design techniques, many originally targeting wireless sensor networks, will enable a new generation of body-worn devices for health monitoring. We utilize the state-of-the-art in low power RF transmitters, low voltage boost circuits, subthreshold processing, biosignal front-ends, dynamic power management, and energy harvesting to realize an integrated reconfigurable...
This paper considers the joint power allocation and subcarrier pairing problem in decode-and-forward (DF) relaying orthogonal-frequency-division multiplexing (OFDM) system, and proposes a strategy, called MW-RA, to maximize the weighted sum rate with total power constraint. MW-RA is formulated as a mixed integer programming problem and then transformed to a convex optimization problem by continuous...
In this paper, we present a novel error resiliency approach for short-range point-to-point wireless video transmission systems that have particularly stringent delay constraints. We propose to utilize per-packet feedback information that can be generated and transmitted instantaneously from the receiver to the transmitter in such systems to help control the transmission errors. A framework for error...
Network coding has been designed for wireless networks to improve the capabilities of throughput, reliability, and routing by mixing information from different flows and conveying more information in each transmission. If packets are coded by blocks with large sizes, time-sensitive applications in wireless network will suffer from high latency between blocks caused by intrasession coding scheme. In...
Network coding has been designed for wireless networks to improve the capabilities of throughput, reliability, and routing by mixing information from different flows and conveying more information in each transmission. If packets are coded by blocks with large sizes, time-sensitive applications in wireless network will suffer from high delay between blocks caused by intra-session coding scheme. In...
Wireless sensor and actuator networks (WSAN) are increasingly popular due to their abilities to detect and react to interesting events in the physical world. In this paper, a new indoor WSAN system in the context of pursuit evasion games (PEGs) is designed and implemented. Our goal is to take advantage of the WSAN capabilities to perform target tracking and capture. We design the system control model,...
A kind of environmental monitoring system based on wireless mesh network with the core of embedded system ARM9 S3C2410 microprocessor is presented in the paper. The flexible and self-organizing wireless mesh network is used to achieve the real time acquisition and multi-hop wireless communication of parameters of the monitoring atmospheric environment such as SO2, NO2, NO, temperature, humidity and...
Dissolved oxygen (DO) is an important indicator of the water quality in the modern sewage treatment It reflects the degree of self-purification capacity of the water. In this paper, we proposed a kind of wireless sensor network-based dissolved oxygen online collection terminal. The terminal, with the core of ARM (Advanced RISC Machines) microprocessor, combines of multi-sensor data fusion technology...
Traditional data collection terminals mainly utilize the method of wire, but on the occasion of scattered collection points and the scene complex environment, it is very difficult to wire. Based on wireless sensor network technology, a kind of data collection terminal with ARM9 as a core processor is proposed in this paper, which replaces the traditional actual wiring with wireless sensor network...
In public places such as banks, hospitals and schools which require higher safety, when the emergent circumstances of serious natural disasters or terrorist attacks are happened, the traditional means of communication rely on the base station were often restricted seriously by the environment and lots of difficulties are created to the rescue work. To counter this limitation, an emergency response...
Considering a series of problems including the oil wells are distributed dispersedly in oil field and the field data being not returned in time which resulting in the fault in oil production wells cannot be forecasted and dealt with timeliness. In this paper a remote monitoring system of pumping unit based on ZigBee wireless mesh network is proposed. The system adopts the ZigBee technology as the...
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