Advances in mobile devices, sensors and wireless networks have motivated the development of location based services(LBS) applications. However, most of the positioning methods specifically designed for either indoor o...
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Advances in mobile devices, sensors and wireless networks have motivated the development of location based services(LBS) applications. However, most of the positioning methods specifically designed for either indoor or outdoor and their accuracy and precision differs greatly, so it’s difficult using only one positioning method to meet all people’s demands. This paper proposes a new architecture for ubiquitous location based services in TD-SCDMA. In this architecture the proper positioning methods are determined by the uses’ surroundings and the demands of accuracy and precision, and the problem that the user’s environments change has been also resolved commendably. And this architecture solves the problem that environment changes while positioning. The simulation shows that everyone can use the location based services anywhere and anytime with the mobile terminal through this architecture.
With the development of location technologies, advanced LBS-based ITS increasingly requires the capability of database technologies to manage the continuously arrived vehicles’ location, traffic jam and other interre...
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With the development of location technologies, advanced LBS-based ITS increasingly requires the capability of database technologies to manage the continuously arrived vehicles’ location, traffic jam and other interrelated information of large amounts of traffic in the following years. And some burst arrival stream data will challenge the real-time performance and the allocation of limited resource. However, choosing a desirable database operator scheduling strategy can significantly improve the performance of the system. The path capability strategy was chosen and improved as ITS’ operator scheduling strategy to meet the real-time response and the minimal memory requirement of the system.
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