Yuji Tajima

Title: Yuji Tajima: Inventor in Mobile Network Systems

Introduction

Yuji Tajima is an inventor associated with Kawasaki, Japan. His patent work includes mobile network systems and methods for providing guidance messages. He is credited with 4 patents.

Latest Patents

Tajima’s listed patents address how mobile networks deliver guidance messages to users, including when calls are restricted or routed between access gateways.

- **Mobile network system and guidance message providing method.** This invention describes a system with a guidance message control server, a call control server, and multiple access gateways. The call control server identifies an access gateway subject to call restriction and instructs the guidance message control server to send a message. The control server then multicasts the guidance message data to a specified group, while participating access gateways forward it to mobile terminals.

- **Mobile network system and guidance message providing method.** This patent describes a call-handling process in which the call control server receives a notification from an access gateway, checks whether another gateway is connected to a second mobile terminal, and coordinates delivery of guidance message data. The guidance message control server multicasts the data to a group identified in the call response, and the relevant access gateway joins that group and transmits the message.

Career Highlights

Tajima’s listed professional affiliations include Fujitsu Corporation and Fujitsu Semiconductor Limited. His patent work reflects an emphasis on mobile-network call control and the delivery of guidance messages through multicast communication.

Collaborations

His listed coworkers include Takashi Mitsuhashi and Kazuyuki Ohtsu.

Conclusion

Yuji Tajima’s patents focus on coordinating call restrictions, access gateways, and multicast delivery to provide guidance messages in mobile networks.