dual priority scheduling based on power adjustment context switching for ubiquitous sensor network
DESCRIPTION
Dual Priority Scheduling Based on Power Adjustment Context Switching for Ubiquitous Sensor Network. 基于能量管理前后转换的双重优先级调度的传感器网络. SUMMARY. Ubiquitous Sensor Network （ USN ） 无所不在的传感器网络的节点通常需要运行数个月，但却只有有限的系统资源比如存储器和能量。一个典型的传感器网络节点在长达几月的寿命中往往只有少于 1% 的时间是处于活跃状态，而 99% 的时候都是处于停止的等待状态。. SUMMARY. - PowerPoint PPT PresentationTRANSCRIPT
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Dual Priority Scheduling Based on Power Adjustment Context Switching for Ubiquitous Sensor Network
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SUMMARY Ubiquitous Sensor NetworkUSN1%99%
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SUMMARYPower Adjustment Dual Priority Scheduler(PA-DPS)USNPA-DPSPA-DPS1%40%
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Key words:Ubiquitous sensor networks, dual priority schedule, operating system
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1.Introduction QoS.
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TinyOSUSNOSOSMANTIS
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USN1%USN99%95%uAMCU
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USNRFUSN
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2.USN(DPS)DPSworst case execution time(WCET)(WCET)USNUSN 1%
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power_adjust()power_adjust()MCUDPSlower run queue(LRQ)upper run queue(URO)
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periodic ready ready(PRQ),sporadic ready queue(SRQ)PRQSRQ FIFO(context-switching free)PRQ
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PRQPRQsporadic tasksPOWER IDLEpower_adjust()
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2ijWAITPRQT(j)T(i)1us32bit16us6016bitT(i,k-2)2Ci
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SRQT(1)T(1)T(j,k-1)CjT(1)SRQPRQPRQ
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power_adjust()
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KE_ADC_COMPLETEDADpa_temp_detecttemp_detectpower_adjust()ADCtemp_detect
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48-bitMAC6-bitdigital to analog converter(DAC)4-bit8051128kMAC24MHz416-bitMACcyclic redundancy check(CRC)MAC
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5PA-DPSpower controllable hardware component(PCHC)power management unit(PMU)PCHChardware definition files(HDF)hardware abstractin library (HAL)HDFHALapplication programming interface(API)PA-DPSHALCMAC
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4.Experimental Results(I)(t)USNUSN
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1RFFIFOMCUsleep()
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USN720.25%
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0.25%99.751011uAAA(3000mAhr)117
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30%PA-DPS7871%
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5.Conclusion PA-DPS1%PA-DPS30~40%PA-DPS