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Digital ecosystems (DEs) are based on a large amount of distributed data, and these data are gathered from physical devices, particularly from wireless sensor networks (WSNs). Due to the inherent stringent bandwidth and energy constraints, energy-efficient mechanisms of performance measurement are the key to the proper operation of WSNs and thereby important for the data reliability of DEs. This paper...
A novel range-free localization approach, smallest enclosing Circle based Localization (SECL), has been proposed. This approach uses the center of smallest enclosing circle of neighboring anchor nodes to estimate the position of target. Comparing to centroid, SECL considers the geometrical coverage of anchors rather than the mass center of them. Consequently, SECL is robust to imperfect topology,...
This paper presents the item-missing error model. It stems from the analysis of real bugs that are collected in two market-oriented projects: (1) the AMBA interface of a general-purpose microprocessor IP core; (2) a wireless sensor network oriented embedded processor. The bugs are analyzed via code structure comparison, and it is found that item-missing errors merit attention. The test generation...
The wireless video network (WVN) is a special wireless sensor network (WSN), which acquires, aggregates and delivers image data. Besides the design challenges of WSNs, there are more difficulties in building WVNs. In this paper, the hardware and software architectures of WVNs are discussed. An enhanced version of S-MAC, High Throughput Sensor MAC (HTSMAC), is proposed to maximize the network throughput...
While a lot of research has been done on some important aspects of WSN such as architecture and protocol design, supporting quality of service in WSN is still a largely unexplored research field. An application-specific QoS has been defined as the sensor network resolution. The mathematical Gur game algorithm is used to achieve optimal active sensor number. In this paper, we design a novel energy-aware...
This paper extends the conditions of the cluster-based routing protocols in terms of general algorithm complexity of data fusion, general compressing ratio of data fusion, and network area with long distance. Corresponding three general evaluation methods to evaluate the energy efficiency of the cluster-based routing protocols such as LEACH, PEGASIS, and BCDCP are provided. Moreover, three facts are...
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