Concurrency Control in Mobile Environments: Issues &amp; Challenges

Moiz, Salman Abdul; Pal, Supriya N.; Kumar, Jitendra; Lavanya,; Joshi, Deepak Chandra; Venkataswamy,

doi:10.5121/ijdms.2011.3411

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…Several works [1,3,[4][5][6][7][8] implemented the concurrency control strategies in mobile environment but because of the complexities of the issues to be considered such as mobility, low-bandwidth, frequent disconnection, low battery etc., most of the approaches were characterized by problems like deadlock, starvation, time lag between local and global commit, higher rate of abort, unnecessary restart.…”

Section: Introductionmentioning

confidence: 99%

“…It is one of the important components of transaction management, where its main requirement is to ensure correctness of shared data item when updated by multiple transactions at the same time [1,2]. In order to preserve data consistency, concurrency control is used in Database Management Systems (DBMS) so as to ensure transactions isolation whenever there are concurrent operations requesting access to the same object; which must be coordinated in order to prevent inconsistencies [3].…”

Section: Introductionmentioning

confidence: 99%

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Lock-free hybrid concurrency control strategy for mobile environment

Bakura

Mohammed

2014

2014 IEEE 6th International Conference on Adaptive Science &Amp; Technology (ICAST)

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Concurrency control is one of the most important components of transaction management, which ensures the correctness of shared data items. Most of the existing concurrency control techniques use locking mechanism to achieve concurrency control, which leads to transaction starvation and deadlock. On the other hand, the non-locking techniques (i.e. optimistic and timestamp ordering) are associated with high abortion rate and excessive transaction restart. This paper presents a lock-free hybrid concurrency control strategy that combines the features of optimistic and timestamp-ordering strategies. The technique allows mobile devices to freely read data items and allowed to pre-commit while in disconnection mode, and latter propagate the pre-committed data during reconnection for global commitment. A designed hybrid concurrency simulator (HCsim) was used to evaluate the performance of the new scheme using transaction abortion rate and response time as performance metrics. Simulation results have shown that lock-free hybrid strategy outperform both optimistic and timestamp strategies in terms of minimizing the transaction abortion rate and response time.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lock-free hybrid concurrency control strategy for mobile environment

Bakura

Mohammed

2014

2014 IEEE 6th International Conference on Adaptive Science &Amp; Technology (ICAST)

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Concurrency control for real‐time and mobile transactions: Historical view, challenges, and evolution of practices

Chaudhry

Yousaf

2021

Concurrency and Computation

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Recently, mobile computing has changed the way that spatial data and GIS are processed. Unlike wired and stand-alone GIS, now the trend has been switched from offline to real-time data processing using location aware services, such as GPS technology. The increased usage of location aware services in multiuser real-time environment has made transaction management incredibly significant. If the simultaneous query operations on the same data item are not handled intelligently then this results in data inconsistency issue. Concurrency control protocol is one of the primary aspects that helps in overcoming this issue a in multiuser environment. To the best of our knowledge, the impact of technological advancements on concurrency control has not been thoroughly studied in the literature. In this article, we explored the literature on concurrency control algorithms in depth with respect to real-time applications and the applications with moving objects. We defined a taxonomy of concurrency control solutions and assessed the maturity of these solutions in the light of characteristics of real-time and mobile environment. We compared the most recent developments made in the literature and presented meaningful insights. Challenges are also identified and discussed, which can assist in doing research in this domain in future. K E Y W O R D S concurrency control, mobile, real time 1 INTRODUCTION IoT (Internet of Things) emerged as a promising technology that has revolutionized the way of living. GPS-based devices and sensors are commonly used in majority of the applications. The convergence of multiple domains such as real-time GIS, mobile computing, and IoT has made it necessary to solve the computing problem considering the requirements of each domain. Mobile GIS domain integrates several technologies: GPS, mobile computing, and GIS. In recent times, the data processing environment deals with varying kinds of sensors. The real-time data collected by sensors need to be processed in timely manner to ensure efficient data management. The sensors can be categorized into two types depending on their mobility: fixed and agile/mobile sensors. Fixed sensors are spatially fixed, whereas mobile sensors change their location with respect to time. Mobile sensors collect data on geographical grounds and this data can be referred to as spatiotemporal data. This has given rise to a new research domain of real-time mobile data processing and management. Thus, real-time processing domain emerged with respect to time depending on the nature of sensor technology and evolution of IoT. The future processing systems are expected to meet the requirements of spatiotemporal and real-time data, leading toward a new domain of real-time GIS. Real-time data can be used for both static and dynamic processing. For example, in the first aspect, mobile sensors can process and analyze the real-time spatiotemporal data for dynamic processing. On the other hand, real-time data can be collected and saved in a log for future offline analysis (static processing).

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