Shou-Chih Lo

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To expand the support for applications with QoS requirements in Wireless Local Area Networks (WLANs), the 802.11E task group was formed to enhance the current IEEE 802.11 Medium Access Control (MAC) protocol. The multipolling mechanism was discussed in the task group, but some problems remain unsolved. In this paper, we show a novel design of the(More)
Mobility management and quality-of-service (QoS) provisioning are the important tasks on the future development of wireless networks. The high host mobility makes these tasks more challenging. In this paper, we propose an architecture which supports both mobility and QoS management in Internet protocol (IP)-based wireless networks. In mobility management,(More)
The issue of data broadcast has received much attention in mobile computing. A periodic broadcast of frequently requested data can reduce the workload of the up-link channel and facilitate data access for the mobile user. Many approaches have been proposed to schedule data items for broadcasting. However, the issues of accessing multiple data items on the(More)
Data broadcast is an excellent method for efficient data dissemination in the mobile computing environment. The application domain of data broadcast will be widely expanded in the near future, where the client is expected to perform complex queries or transactions on the broadcast data. To reduce the access latency for processing the complex query, it is(More)
Many approaches have been proposed to schedule data items for broadcasting in a mobile environment. However, the issues of accessing multiple data items on the broadcast channel are less discussed. In this paper, an efficient strategy for accessing multiple data items in mobile environments is proposed. Two issues are investigated in this paper, that is,(More)
Vehicular Ad Hoc Network (VANET) is an emerging new technology and a promising platform for the Intelligent Transportation System (ITS). The most important application of VANET is disseminating emergency messages to warn drivers in case of dangerous events. The core technique relies on the design of a broadcast scheme. In this paper, we propose a(More)
Vehicular Ad Hoc Network (VANET) is an emerging new technology and a promising platform for the intelligent transportation system. The most important application of VANET is disseminating emergency messages to drivers in case of dangerous events. The effectiveness depends on the design of a broadcast scheme. A simple broadcast scheme encounters many(More)