Dynamic Context-Aware Service Composition, Brokerage and Monitoring in Service-Oriented Computing

面向服务计算中的动态上下文感知服务组合、代理和监控

• 批准号: RGPIN-2018-05014
• 负责人: Paquet, Joey
• 金额: $ 1.68万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=679223
• 关键词: Dynamic; Context; Aware; Service; Composition

Service composition has long been an active research domain that enables a service broker to generate a composite service adapted to the complex needs of their clients. Well-known individual problems such as constraint satisfaction, context-awareness, data integration, and data privacy have all found various independent solutions in the literature. However, a broader look at the situation reveals that these problems are in fact interwoven and their interaction creates other problems that individual solutions cannot solve. Our solution proposes a sound theoretical basis to an integrated solution to all these problems as a whole. ******An article from the Financial Post reported in March 2017 that the Government of Canada is potentially losing up to 1.3B$ yearly in taxation revenue due to international e-commerce failing to charge taxes. This problem stems from the fact that service providers involved in international e-commerce cannot be expected to be aware, nor have authority to apply all international constraints/policies/regulations that apply to the specific context of every customer to which they provide a service. ******Furthermore, e-commerce has a tendency to create more business volume to larger companies that can afford investments in online service collaboration with other companies. Automated service composition augmented with context/constraint-awareness can help more specialized and commercially unconnected service providers to reach for their clientele. For example, a transaction with a local service may prove to be more appropriate compared with a transaction with a foreign service provider after international policies are applied to a transaction. Having an integrated solution for constraint/policy/context management would thus potentially foster the economic viability of contextually specialized (e.g. local) service providers.******The problems stated above are all related, from various perspectives, to the automated manipulation of an integrated data model over the composite service. Despite this common denominator, these problems have not met with an appropriately integrated solution. More specifically, various solutions were provided to the problem of constraint-awareness in composite services. However, they all consider constraints as being inherent to the whole composite service without consideration which part of the composite service they may apply. Also, none of the existing solutions provide an integrated solution considering different sources of constraints, especially externally-defined constraints. ******This project aims at the development of a new integrated constraint/contextual-aware model for the service composition process, as well as for the execution of composite services. This model is based on the notion of possible-worlds semantics, where the computational context and the constraints are modeled over a multidimensional context space.

长期以来，服务组成一直是一个活跃的研究领域，它使服务经纪人能够生成适合其客户复杂需求的复合服务。 众所周知的个人问题，例如约束满意度，上下文意识，数据集成和数据隐私，都发现了文献中各种独立的解决方案。但是，更广泛地了解情况表明，这些问题实际上是交织在一起的，它们的相互作用会带来其他解决方案无法解决的其他问题。我们的解决方案向整个所有这些问题提出了一个合理的理论基础。 ******《金融邮政》（The Financial Pott）的一篇文章在2017年3月报道说，由于国际电子商务未能收取税款，加拿大政府可能会损失高达1.3B美元的税收收入。这个问题源于这样一个事实，即不能期望参与国际电子商务的服务提供商会意识到，也没有权力将适用于他们提供服务的每个客户的特定环境应用所有国际限制/政策/法规。 ******此外，电子商务倾向于为能够负担与其他公司在线服务合作的大型公司创造更多的业务量。具有上下文/约束意识增强的自动化服务组成可以帮助更专业和商业上未连接的服务提供商达到其客户端。例如，与与外交服务提供商的交易相比，在将国际政策应用于交易之后，与本地服务的交易可能更合适。因此，拥有对约束/政策/背景管理的集成解决方案，因此有可能促进上下文专业化（例如本地）服务提供商的经济可行性。尽管有这种共同的分母，但这些问题尚未遇到适当集成的解决方案。更具体地说，为复合服务的约束意识提供了各种解决方案。但是，他们都认为约束是整个复合服务固有的，而无需考虑它们可以应用的复合服务的哪一部分。同样，考虑到不同的约束来源，尤其是外部定义的约束，现有的解决方案都没有提供集成的解决方案。 ******该项目旨在开发服务组成过程的新的集成约束/上下文感知模型，以及复合服务的执行。该模型基于可能世界语义的概念，在该语义上，计算上下文和约束是通过多维上下文空间建模的。