Browsing by Author "Ratsimor, Olga"
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ItemCombining Infrastructure and Ad hoc Collaboration For Data Management in Mobile Wireless Networks(2002-11-20) Ratsimor, Olga; Kodeswaran, Sethuram Balaji; Joshi, Anupam; Finin, Tim; Yesha, YelenaA mobile ad-hoc network is an autonomous system of mobile routers that are self-organizing and completely decentralized with no requirements for dedicated infrastructure support. However, such infrastructure in terms of base stations is available in many popular areas already. These base stations often offer high-speed data connectivity to a wired network. In this paper, we describe an approach where a combination of infrastructure and ad hoc communication can be used to better manage the data needs of a mobile wireless device. In our approach, base stations track user mobility and determine data usage patterns of users passing by. Based on this, future data needs of a mobile device can be predicted. Base stations can collaborate (over the wired network) to identify other mobile devices with spare capacity whose routes intersect that of a needy device and use these carriers to transport data. When such a carrier meets the needy device, they can form ad hoc peer-to-peer communities to transfer the carried data. We also present the motivation, architecture and design of NUMI, our framework for supporting combined infrastructure and ad hoc peer-to-peer computing and a prototype application built on top of this framework. ItemeNcentive: a framework for intelligent marketing in mobile peer-to-peer environments(ACM, 2003-10-03) Ratsimor, Olga; Finin, Tim; Joshi, Anupam; Yesha, YelenaIn recent years, the growth of Mobile Computing, Electronic Commerce and Mobile Electronic Commerce has created a new concept of Mobile Electronic Marketing. New marketing models are being developed and used to target mobile users. Mobile environments introduces new challenges that need to be overcome by these marketing models in order to be successful and effective. This paper proposes a framework, called eNcentive, which addresses many of the issues that are characteristic of mobile environments. eNcentive facilitates peer-to-peer electronic marketing in mobile ad hoc environments. Our framework employs a intelligent marketing scheme, by providing users the capability to collect information like sales promotions and discounts. Users can propagate this marketing information to other users in the network. Participating users benefit from such circulation since businesses that originally created the promotions reward the active distributors with additional promotions and other compensations. ItemInformation agents for mobile and embedded devices(World Scientific Publishing Co Pte Ltd, 2002-09-01) Finin, Tim; Joshi, Anupam; Kagal, Lalana; Ratsimor, Olga; Avancha, SasikanthThe pervasive computing environments of the near future will involve the interactions, coordination and cooperation of numerous, casually accessible, and often invisible computing devices. These devices, whether carried on our person or embedded in our homes, businesses and classrooms, will connect via wireless and wired links to one another and to the global networking infrastructure. The result will be a networking milieu with a new level of openness. The localized and dynamic nature of their interactions raises many new issues that draw on and challenge the disciplines of agents, distributed systems, and security. This paper describes recent work by the UMBC Ebiquity research group which addresses some of these issues. ItemService Discovery in Agent-Based Pervasive Computing Environments(Springer Nature Switzerland AG., 2003-11-30) Ratsimor, Olga; Chakraborty, Dipanjan; Joshi, Anupam; Finin, Timothy; Yesha, YelenaDirectory based service discovery mechanisms are unsuitable for ad-hoc m-commerce environments. Working towards finding an alternate mechanism, we developed Allia: a peer-to-peer caching based and policy-driven agent-service discovery framework that facilitates cross-platform service discovery in ad-hoc environments. Our approach achieves a high degree of flexibility in adapting itself to changes in ad-hoc environments and is devoid of common problems associated with structured compound formation in mobile commerce environments. Device capabilities and limitations, user preferences regarding device usage, application specifics with respect to mobile commerce are factors that our framework adapts to. We have described our initial implementation of Allia over ThinkPads and iPAQs by extending the LEAP Agent Platform and using Bluetooth as the underlying network protocol. In addition, we evaluated Allia's performance by running simulations of our protocol in Glomosim simulator. We also compared our framework against a structured compound-based architecture.