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Yoo, Jong-Sun;Kim, Byung-Kon;Choi, Byoung-Kyu;Heu, Shin
- The KIPS Transactions:PartA
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- v.18A no.6
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- pp.255-264
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- 2011
A sensor network is a special network that makes physical data sensed by sensor nodes and manages the data. The sensor network is a technology that can apply to many parts of field. It is very important to transmit the data to a user at real-time. The core of the sensor network is a sensor node and small operating system that works in the node. TinyOS developed by UC Berkeley is a sensor network operating system that used many parts of field. It is event-driven and component-based operating system. Basically, it uses non-preemptive scheduler. If an urgent task needs to be executed right away while another task is running, the urgent one must wait until another one is finished. Because of that property, it is hard to guarantee real-time requirement in TinyOS. According to recent study, Priority Level Scheduler, which can let one task preempt another task, was proposed in order to have fast response in TinyOS. It has restrictively 5 priorities, so a higher priority task can preempt a lower priority task. Therefore, this paper suggests Preemptive EDF(Earliest Deadline First) Scheduler that guarantees a real-time requirement and reduces average respond time of user tasks in TinyOS.
https://doi.org/10.3745/KIPSTA.2011.18A.6.255 인용 PDF KSCI

Korea Electronics Association
- Journal of Korean Electronics
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- v.26 no.5
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- pp.10-16
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- 2006
기술개발과 표준선점으로 블루오션을 창출하고 새로운 성장 동력으로 자리매김을 목표로 하는 우리나라 홈 네트워크 산업의 현재와 미래를 조명해 본다.
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