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Mobile networks are being evolved from 3.5G to 3.9G/4G, integrated into IP core network based on IMS (IP Multimedia Sub-system). In this environment, it is essential to provide sufficient QoS(Quality of Service) mechanism which enables different services to provide enhanced user satisfaction. In this paper, we propose a new QoS mechanism providing adaptive resource allocation based on each user's...
The wireless ubiquitous network and various communication services are expected to be realized. The wireless ubiquitous network is defined as the converged network to integrate the mobile network with the fixed IP based network. First, the concept of wireless ubiquitous network architecture is shown which is based on IMS standardized by 3GPP. Next, Parlay is described as the solution of Open API approach...
Field data collection system to be described in this paper is an application example of the wireless sensor network. The purpose of the system is to provide more accurate analyzing method with the researchers in the remote sensing area by matching appropriate field data with the satellite data, which means to realize the ground truth in the area of remote sensing.
Mobile network has been tremendously increased in the number of users, diversity of applications and of interface technologies. Also mobile network need to provide sufficient adaptive End-to-End QoS management mechanism to provide enhanced user satisfaction. In this paper, we propose a new adaptive End-to-End QoS management mechanism based on the concept of utility function which we have borrowed...
In this paper, first, the wireless ubiquitous network architecture is described based on IMS which has been standardized by 3GPP (3rd Generation Partnership Program). Next, Parlay is described as one of the solution of the service creation issue. Then the vehicle dispatcher service is described as an example of service.
In this paper, the concept of the wireless ubiquitous network is described based on IMS (IP multimedia subsystem) which has been standardized by 3GPP (3rd Generation Partnership Program). Next, the outline and field data result of the local network developed for Tokyo University of Information Sciences is described which is based on the proposed concept of the wireless ubiquitous network.
IMS provides a mean that integrates heterogeneous networks into an IP based network enabling ubiquitous network. In this paper, we describe the experiment of IMS core network inevitable before the system deployment to the current network, in terms of system architecture, experiment configuration and switching mode conversion
The ubiquitous network and various applications are expected to be realized rapidly. In this paper, the ubiquitous network is defined as the unified network to integrate the mobile wireless network with the fixed IP based network including W-LAN. First, the ubiquitous network architecture is shown which is based on IMS (IP multimedia subsystem) standardized by 3GPP as Release 5. Next, Parlay is described...
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