Kengo Ijima

Title: Kengo Ijima: Innovator in Multicast Technology

Introduction

Kengo Ijima is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of multicast technology, holding a total of 4 patents. His work focuses on enhancing the efficiency and functionality of broadband access systems.

Latest Patents

Kengo Ijima's latest patents include a multicast accounting control system and a broadband access server. The multicast accounting control system differentiates listening or viewing charges based on bit rates depending on distributed programs. It features a broadband access server that holds user channels by PPP and replicates and transfers multicast packets. This system includes a counter that tracks the number of distributed multicast packets and the number of distributed bytes for each multicast group address. When a user joins or leaves a multicast group, the counter values, along with a multicast session ID containing a PPP user ID and a multicast group address, are sent to a multicast accounting radius server. The multicast accounting server then provides accounting based on the byte counts, packet counts, or bit rate.

Another significant patent is the multicast packet relay device adapted for virtual routers. This invention addresses the issue of increased traffic in relay networks when multicast is utilized in networks configured with virtual routers. By performing multicast packet transfers across virtual routers within the same router, the number of multicast packets via the relay network is reduced. Each virtual router can register a line interface identifier of another virtual router as outgoing line interface information, facilitating multicast packet transfer between virtual routers.

Career Highlights

Kengo Ijima has worked with prominent companies such as Hitachi Communication Technologies, Ltd. and Hitachi, Ltd. His experience in these organizations has contributed to his expertise in multicast technology and network systems.

Collaborations

Throughout his career, Kengo Ijima has collaborated with notable colleagues, including Hiroaki Miyata and Masanori Kamata. These collaborations have further enriched his work and innovations in the field.

Conclusion

Kengo Ijima's contributions to multicast technology demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to improving broadband access systems and enhancing network efficiency.