Search results for: Soamsiri Chantaraskul
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The increasing demand on the limited spectrum of unlicensed 2.4 GHz ISM band leads to the coexistence problems, which are one of the major challenges especially for Wireless Sensor Networks (WSNs). The coexistence issue does not only affect the service quality, but also shorten the battery lifetime of the WSN devices. Most works focus on system internal processes without the concern on environmental...
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Wireless Personal Communications > 2017 > 94 > 1 > 83-98
Dedicated short-range communication technology has been proposed for wireless access in vehicular environment (WAVE) standard. With this technology, road users can benefit from utilizing inter-vehicle and infrastructure to vehicle communication services, which are crucial for enhancing road safety and facilitating efficient transportation. WAVE standard provides different channel assignment patterns...
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Growing number of vehicles on the road unavoidably leads to increasing amount of accidents. As a result, Vehicular Ad-hoc Network (VANET) has been proposed with the aim of preventing accidents and increasing road safety. Based on the currently proposed Dedicated Short-Range Communication (DSRC) technology for Wireless Access in Vehicular Environment (WAVE) standard, in the scenario with high vehicle...
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With the increasing number of devices sharing the 2.4 GHz ISM band, coexistence problem becomes one of the major issues experienced by Wireless Sensor Networks (WSN). Cognitive Wireless Sensor Networks (CWSNs) has been proposed in order to achieve reliable and efficient communication via spectrum awareness and intelligent adaption. The learning and decision making technique is one of the core competences...
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One of the crucial challenges experienced by Wireless Sensor Networks (WSNs) is the increasing number of devices sharing the limited spectrum of the ISM band. As a result, a new concept of Cognitive Wireless Sensor Networks (CWSNs) has been proposed in order to achieve reliable and efficient communication via spectrum awareness and intelligent adaption. Based on such concept, this paper proposes novel...
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Interference is one of the major problems in Wireless Sensor Networks (WSNs). Since WSNs are typically operating on the shared and unlicensed spectrum band, interference may not be controllable especially under the coexistence of devices in different wireless networking standards operating in the same area. Collection Tree Protocol (CTP) is a routing protocol that is able to support large scale WSNs...
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Interference is one of the major factors influencing system performance of Wireless Sensor Networks (WSNs). This issue needs a serious attention, since WSNs are typically operating on the shared and unlicensed spectrum band. In other words, interference may not be controllable especially under the coexistence of devices operating with different standards within the same area. Collection Tree Protocol...
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Spectrum sensing is one of the crucial aspects in Cognitive Radio (CR). Fast and accurate spectrum opportunity detection provides interference avoidance to other/licensed users. At the same time, it offers more efficient spectrum utilization by providing accurate sensing information as an input to the intelligent dynamic resource allocation process. Wideband spectrum sensing has been introduced due...
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Cognitive Radio (CR) introduces the idea of system awareness and intelligent adaptability in order to provide more efficient spectrum utilization especially in spectrum scarcity environment, which is happening in wireless communications. One of the key CR functionalities is the spectrum sensing, which allows CRs to monitor radio environment and detect unused spectrum. A fast and accurate detection...
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Engineering Applications of Artificial Intelligence > 2008 > 21 > 4 > 619-632
The exploitation of wideband code division multiple access (W-CDMA) technology in third generation (3G) networks gives an inherent flexibility in managing the system capacity, although radio resource management (RRM), including congestion management, is more complicated. To guarantee the quality of service (QoS) provided to customers, the concept of a “service level agreement” (SLA) is introduced...
