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One of the toughest, challenging and interesting recent trends in the computer and communications industries is the integration of mobile communications and computing. The resulting distributed network, referred to as mobile computing system, is in, more than one way fundamentally different from conventional wired computer networks.
With the advent of small portable computers and technological advances in wireless communications, mobile wireless computing is likely to become very popular in the near future. Wireless links are slower and less reliable compared to wired links are prone to losses of signal due to noise and fading. Furthermore, host mobility can give rise to periods of disconnection frown the fixed network. The use of existing network protocol which were developed mainly for the high bandwidth and faster wired links, with mobile computers thus give rise to unique performance problems arising from lost mobility and due to the characteristics of wireless medium.
The popularity and usefulness of the Internet seem to grow exponentially every day. As a result of this rapid growth, mobile users expect to access the Internetís information resources and to communicate with other Internet users. However, providing efficient and reliable stream transmissions in mobile computing environments presents a significant obstacle to the development of mobile computing systems over the Internet. This paper presents three approaches-known as Fast Retransmissions, Data Interceptions, and Packet Interceptions-that can be used to improve the performance and reliability of transmission protocols in mobile computing environments. The paper also discusses how packet interception has become the most effective approach of the three and describes its, implementation.
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Mobile computing has fast become an important new paradigm in enabled PDAs to wireless sensor networks, mobile computing has become ubiquitous in its impact on our daily lives. The debut if iPhones and the proliferation of other handheld devices has spurred excitement and interest in this evolving field. In this seminar, we will study the state-of-the-art in both the research and commercial communities with respect to mobile computing. We will investigate standard protocols and platforms, the capabilities of today's commercial devices, and proposed next-generation solutions. In the process, we will seek to gain an improved understanding about where the field is headed, and what are the important remaining unanswered technical questions and challenges.
Mobile computing is a new style of computer access emerging at the intersection of the two currently dominant trends: producing portable computers in computer industry and wireless communications in telecommunication industry. This paper discusses some key issues involved in realizing a mobile wireless computing environment by examining the characteristics required of each main component: mobile computer, wireless communications network, and coordination software.
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