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Aerial wireless sensor and actor networks are composed of multiple unmanned aerial vehicles. An actor node in the network has the capabilities of both acting on the environment and also performing networking functionalities for sensor nodes. Thus, positioning of actors is critical for the efficient data collection. In this paper, we propose an actor positioning strategy, which utilizes a hybrid antenna...
An AWSN composed of bird-sized Unmanned Aerial Vehicles (UAVs) equipped with sensors and wireless radio, enables low cost high granularity three-dimensional sensing of the physical world. The sensed data is relayed in real-time over a multi-hop wireless communication network to ground stations. The following characteristics of an AWSN make effective multi-hop communication challenging - (i) frequent...
This paper proposes the protocol of Quantum Secure Direct Communization (QSDC) based on the secret initial Bell states which are shared by two legitimate communicators. Then, we analyze the security of the protocol against the intercept-and-resend attack and individual attack. It is unnecessary for the scheme to make odd particles especially which is used for detection of eavesdropping. Instead, it...
In the application of target tracking based on dynamic convey tree-based collaboration (DCTC) in wireless sensor networks, collisions and interferences among nodes pose a challenge for data aggregation. In this paper, we refine slot allocation to the nodes in dynamic convey tree and design an energy efficient MAC protocol called D-TDMA, which avoids collisions and interferences and allocates contiguous...
In real-time database system, the same data through the read and write operations, the implementation of concurrent real-time transaction could undermine the consistency of the database. Concurrency control algorithm must be used to ensure serializability of transaction scheduling, and real-time database system to maintain data consistency. In light of the traditional real-time database concurrency...
With the continuous development of technology in electronics products field, an increasing number of media devices emerge into the family-use range, which intensifies the demand of inter-sharing of digital data among different types of devices. A media Server is a platform to supply the sharing of equipment and media resources for home network with a focus on network media content management. This...
It is a traditional method that using serial port or JTAG port to download application programmes with complex multi-layer protocol or operation system core into the target evaluation board. However it has become harder to satisfy the needs of the increasing extended development requirement because of the speed limit. The paper proposes a scheme that can complete the downloading operation to the evaluation...
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