Masashi Toyama

Android as a server platform

The number of smartphone users and mobile applications are growing rapidly. Though smartphones are expected to have PC-like functionality, hardware resources such as CPUs, memory and batteries are still limited. To solve this resource problem, many researches have proposed architectures to use server resources in the cloud for mobile devices. We propose a conceptual architecture of Android as a Server Platform, which enables multiple user Android applications on cloud server via network. Though Android is mainly designed for physical smartphone, Androids two other features are useful to construct a server platform. Android is open-source product and runs on an ×86 CPU. We show three types of multi-tenant architecture for an Android server platform and discuss the direction to take to it reality.

Demonstration of Web Contents Collaborative System for Call Parties

We demonstrate a mock-up that enables the sharing of existing Web contents between the caller and receiver in a phone call. Two methods for this sharing are described. One is a mash-up method using APIs that existing Web contents provide. The other is a proxy method that uses existing Web contents as is. Both methods can be used with basic Web browsers.

Demonstration of Call-to-Web Session Linkage System

We demonstrate a prototype of a call-to-Web session linkage system for sharing a Web application between caller and receiver. The system makes a session linkage between Web browsers based on call session information of SIP, which is an application-layer control protocol mainly used for IP telephony systems. After that, the system offers Web servers information for the linkage so that Web servers can provide a shared Web service easily. This system can even be uses by a browser of home appliances, which are difficult to upgrade because those linkage protocols consist of basic browser functions such as HTTP redirect and JavaScript.

Hosting a Server on a Browser Using Wemu Architecture: Secure File Sharing Service Implementation

We propose a system architecture called Wemu that enables file sender to use a browser to host a Hypertext Transfer Protocol Secure (HTTPS) server as a web application. The architecture connects the application to a web-based computer system emulator via a low-layer device emulator. The unique point regarding this architecture is that it avoids the limitations of web applications by using an emulator. We classify devices and clarify conditions for emulating the devices using only a browser. We also propose file sharing service that uses this architecture. Using the Wemu architecture, file sender uses a browser to host an HTTPS server, which is a traditional application. The architecture actualizes the execution of web applications depending on the server. We describe the design of the network interface controller emulator and implementation details of the proposed file sharing service as an example of the proposed architecture.

Implementation of session-based Web linkage system on IMS

VoIP (Voice over IP) using Session Initiation Protocol (SIP) is put to practical use along with Internet Protocol (IP) technology improvement. Moreover, the IP Multimedia Subsystem (IMS) in a Next Generation Network (NGN) has been achieved using the SIP. The attempt to develop new services to make the application servers using cooperate with the functions of IMS. We propose a session-based Web linkage system that enables sharing Web applications between caller and callee of telephone communication based on IMS-managed session information. Using existing standardized network functions and APIs would make the system easy to apply in the IMS. Our prototype system on an open source IMS shows the feasibility and implementation issues of our proposed method in practical use.

Demonstration of synchronized information-sharing method on Web

There is undoubtedly an increase in the number of Web-connected devices, such as home appliances, handheld devices, and smartphones. Though Web applications are intended for information sharing among users, conventional Web technology does not sufficiently support synchronized sharing of information among various devices. We propose a method for synchronized sharing information among various Web-connected devices. We present an online bingo game system as an example of an information-sharing application. Members of the bingo game can shout “Bingo!” at the same time among all members from different environments.

Web Contents Collaborative Method in Call-to-Web Session Linkage System

To increase the Web contents of the call-to-Web session linkage system that we have proposed, we diilcuss a method that enables the use of existing Web contents without any modification for sharing. The proposed method uses a proxy server to detect and convert the transitioning URLs. We evaluated the ability of the proposed method to correspond to the form of the content and considered the correspondence for dynamic contents.