Mobile Transaction Models

1
Mobile Transaction Models

• John Cunningham
• CS 6400
• 4/28/05

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Mobile Environment
Figure from 4
3
Kangaroo Transactions

• 3 Layers source system, data access agent, and
  the mobile transaction
• Handoff between base stations
• 2 Processing Modes compensating and split
• Data access agent maintains transaction info

Hop
Hop
Figure modified from 1
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PRO-MOTION Transactions

• Data issued as compacts
• Disconnections seen as main problem
• Mobile hosts can do offline processing
• Can implement different concurrency schemes
  check-in/check-out, leases

Figure from 3
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Moflex Transactions

• Each Moflex transaction is made of
  subtransactions, dependencies, rules, and
  acceptable states
• Subtransactions are compensable or
  non-compensable
• Dependencies success, failure, external
• User defines success state of Moflex transaction
• Handoff rules restart, continue, split_resume,
  split_restart
• Behavior depends on rules and dependencies
• Each transaction is customizable

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References

• 1 Margaret H. Dunham, Abdelsalam Helal, and
  Santosh Balakrishnan. A mobile transaction
  model that captures both the data and movement
  behavior. Mobile Networks and Applications,
  Vol. 2, 1997, pages 149-162.
• 2 M. M. Gore and R. K. Ghosh. Recovery of
  Mobile Transactions. Proceedings of the DEXA
  Conference, 2000, pages 23-27.
• 3 Gary D. Walborn and Panos K. Chrysanthis.
  Pro-motion Management of Mobile Transactions.
  Proceedings of the 11th ACM Symposium on Applied
  Computing, 1997, pages 101-108.
• 4 Kyong-I Ku and Yoo-Sung Kim. Moflex
  Transaction Model for Mobile Heterogeneous
  Multidatabase Systems. Proceedings of the 10th
  International Workshop on Research Issues in Data
  Engineering Middleware for Mobile Business
  Applications and E-Commerce, February 2000, pages
  39-46.
• 5 J. Sairamesh, S. Goh, I. Stanoi, S.
  Padmanabhan and C.S. Li. Disconnected
  Processes, Mechanisms, and Architecture for
  Mobile E-Business. Mobile Networks and
  Applications, Vol. 9, 2004, pages 651-662.