Data management in real-time systems: a case of on-demand updates in vehicle control systems

Gustafsson, Thomas; Hansson, Jörgen

doi:10.1109/rttas.2004.1317263

Cited by 43 publications

(45 citation statements)

References 17 publications

(16 reference statements)

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“…There have been extensive research works in the literatures on maintaining temporal validity and freshness of real-time data objects (Labrinidis and Roussopoulos, 2001;Xiong and Ramamritham, 2004;Xiong et al, 2005Xiong et al, , 2006aHan et al, 2009Han et al, , 2008Xiong et al, 2008aXiong et al, , 2010Lam et al, 2004;Ahmed and Vrbsky, 2000;Gustafsson and Hansson, 2004;Jun et al, 2008). Many of them use periodic update transactions to provide a guarantee in data validity, i.e., the data objects are valid throughout the whole operation period of a system.…”

Section: Related Workmentioning

confidence: 99%

“…With the rapid advancements in wireless communication and sensor technologies in recent years, real-time database technologies are gaining increasing interests for applications into various time-critical surveillance systems. Some example applications are robot control (Dertouzos, 1974), health monitoring systems (Ko et al, 2010), industrial plant management (Li and Liu, 2009;Song et al, 2008) and vehicular control (Gustafsson and Hansson, 2004). With the use of database technologies, various sophisticated database operations and functions can be supported to enhance the surveillance functions.…”

Section: Introductionmentioning

confidence: 99%

“…To perform effective surveillance functions on an operation environment with the use of a real-time database system, a common method is to use periodic application transactions which are defined according to the application and surveillance requirements Gustafsson and Hansson, 2004). Each invocation of an application transaction (called an application job in this paper) has a hard or firm deadline on its completion time.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adaptive co-scheduling for periodic application and update transactions in real-time database systems

Han

Lam

Wang

et al. 2012

Journal of Systems and Software

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adaptive co-scheduling for periodic application and update transactions in real-time database systems

Han

Lam

Wang

et al. 2012

Journal of Systems and Software

View full text Add to dashboard Cite

“…Extensive research works have been done on maintaining temporal validity and freshness of real-time data objects [1,7,9,19,32,33,35]. The basic method is to use periodic update transactions.…”

Section: Related Workmentioning

confidence: 99%

An effective fixed priority co-scheduling algorithm for periodic update and application transactions

et al. 2012

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An important function of many Cyber-Physical Systems (CPS) is to provide a close monitoring of the operation environment to be able to adapt to changing situations effectively. One of the commonly applied techniques for that is to invoke time-constrained periodic application transactions to check the status of the operation environment. The status of the environment is represented by the values of the physical entities in the operation environment which are maintained as real-time data objects in a real-time database. Unfortunately, meeting the deadlines of application transactions and maintaining the quality of real-time data objects are conflicting with each other, because they compete for the same computation resources. To address this problem of update and application transactions co-scheduling problem, in this paper, we propose a fixed priority co-scheduling algorithm called Periodic Co-Scheduling ( PCS). PCS uses periodic update transactions to maintain the temporal validity of real-time data objects. It judiciously decides the priority orders among all the update and application transactions so that the constructed schedule can satisfy the deadline constraints of all the application transactions and at the same time maximize the qualities of the real-time data objects to ensure the correct execution of application transactions. The effectiveness of the algorithm is validated through extensive simulation experiments.

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“…There has been extensive research work on maintaining validity and freshness of real-time data objects [6,[12][13][14][15][16][17]. The basic method is to use periodic update transactions to maintain data validity, i.e., update jobs are generated from an update transaction periodically to maintain the validity of a data object [6,7].…”

Section: Related Workmentioning

confidence: 99%

On Co-scheduling of Periodic Update and Application Transactions with Fixed Priority Assignment for Real-Time Monitoring

Wang

Lam

Han

et al. 2012

2012 IEEE 26th International Conference on Advanced Information Networking and Applications

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Abstract-In a real-time database system for detection of critical events, meeting the deadlines of the application transactions and maintaining the quality of the real-time data objects are two critical issues in ensuring the effectiveness of performing the real-time monitoring tasks. Unfortunately, these two goals conflict with each other and are difficult to be achieved at the same time. To address this update and application transaction co-scheduling problem, in this paper, we propose a fixed priority scheduling algorithm called Periodic Co-Scheduling (PCS). PCS uses periodic update transactions to maintain the temporal validity of real-time data objects. It judiciously decides the priority order among all the update and application transactions so that the constructed co-schedule can satisfy the deadline constraints of all the application transactions while maximizing the qualities of the real-time data objects. The effectiveness of the PCS algorithm is validated through our extensive simulation experiments.

show abstract

Data management in real-time systems: a case of on-demand updates in vehicle control systems

Abstract: Abstract

Cited by 43 publications

References 17 publications

Adaptive co-scheduling for periodic application and update transactions in real-time database systems

Adaptive co-scheduling for periodic application and update transactions in real-time database systems

An effective fixed priority co-scheduling algorithm for periodic update and application transactions

On Co-scheduling of Periodic Update and Application Transactions with Fixed Priority Assignment for Real-Time Monitoring

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