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It is very important to provide a parameterized quality of service (QoS) using traffic specification (TSPEC), such as mean data rate, maximum burst size, and peak data rate, when packets from the application layer need to be transmitted with guaranteed services in a high-rate wireless personal area network (HR-WPAN). As medium resources are limited, the optimal medium time required for each device needs to be estimated to share the resources efficiently among devices. This paper proposes a variable-service interval-based resource allocation algorithm to efficiently make a reservation of medium resources based on a parameterized QoS. In other words, the proposed algorithm calculates the number of medium access slots (MASs) based on TSPEC, local resources, and local conditions and determines suitable locations for the MASs within a superframe to accommodate more devices. The simulation results show that the proposed algorithm can accommodate more devices and has greater than 10% resource allocation efficiency in an HR-WPAN compared to existing schemes. [ABSTRACT FROM AUTHOR]

In this article, the intelligent home care system based on context-awareness consists of a sensor platform, a context-aware framework and an intelligent agent, where a sensor platform collects raw data and sends them to a context-aware framework, where perceives residents' and a home's context An intelligent agent triggers intelligent and automatic services according to the information based on situation of the context-aware framework. We design and implement an intelligent home care system based on the context-awareness technology, which minimizes residents' interventions and maximizes functional autonomy of systems. Also we suggest system architecture and its flows for the proposed system. In this article we discuss interaction issue about conflict and interference between various context information and service in the ubiquitous home environment Context information conflict arises in deciding service through various sensing information. Service interaction generated when service is applied in different controls at the same time for the same device. We focused on context-aware based service mechanism. [ABSTRACT FROM AUTHOR]