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首页> 外文期刊>The Journal of Systems and Software >Efficient validation of mobile transactions in wireless environments
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Efficient validation of mobile transactions in wireless environments

机译:在无线环境中有效验证移动交易

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摘要

In broadcast environments, the limited bandwidth of the upstream communication channel from the mobile clients to the server bars the application of conventional concurrency control protocols. In this paper, we propose a new variant of the optimistic concurrency control (OCC) protocol that is suitable for broadcast environments. At the server, forward validation of a transaction is done against currently running transactions, including mobile transactions and server transactions. At the mobile clients, partial backward validation of a transaction is done against committed transactions at the beginning of every broadcast cycle. Upon completion of execution, read-only mobile transactions can be validated and committed locally and update mobile transactions are sent to the server for final validation. These update transactions have a better chance of commitment because they have gone through the partial backward validation. In addition to the nice properties of conventional OCC protocols, this protocol provides autonomy between the mobile clients and the server with minimum upstream communication, which is a desirable feature to the scalability of applications running in broadcast environments. This protocol is able to process both update transactions and read-only transactions at the mobile clients at low space and processing overheads. (C) 2003 Elsevier Inc. All rights reserved. [References: 33]
机译:在广播环境中,从移动客户端到服务器的上游通信通道的有限带宽阻碍了常规并发控制协议的应用。在本文中,我们提出了一种适用于广播环境的乐观并发控制(OCC)协议的新变体。在服务器上,针对当前正在运行的事务(包括移动事务和服务器事务)进行事务的正向验证。在移动客户端,在每个广播周期开始时,针对已提交的事务对事务进行部分向后验证。执行完成后,可以在本地验证和提交只读移动事务,并将更新的移动事务发送到服务器以进行最终验证。这些更新事务具有更好的承诺机会,因为它们已通过部分向后验证。除了常规OCC协议的优良特性外,该协议还通过最少的上游通信在移动客户端和服务器之间提供了自治权,这对于在广播环境中运行的应用程序的可伸缩性而言是理想的功能。该协议能够以较低的空间和处理开销在移动客户端上处理更新事务和只读事务。 (C)2003 Elsevier Inc.保留所有权利。 [参考:33]

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