Kari Virtanen

Title: Kari Virtanen: Innovator in Telecommunications

Introduction

Kari Virtanen is a notable inventor in the field of telecommunications, hailing from Tampere, Finland. With a focus on enhancing mobile communication systems, he has made significant contributions through his innovative patents. His work has been instrumental in improving the efficiency and security of telecommunications networks.

Latest Patents

Kari Virtanen holds 4 patents that showcase his expertise in telecommunications. One of his latest patents is titled "Radio network access mechanism." This invention describes a method of registration in a telecommunications system by a mobile station, which includes a home location register for maintaining subscriber data. The system supports both a first network, such as GSM, and a second network, such as GPRS. The home location register maintains mobile subscriber data and sends a message to request this data. It also maintains an access parameter indicating whether the mobile subscriber can use one or both networks. This access parameter is crucial for restricting access to either a circuit-switched network or a packet-switched network.

Another significant patent is "Arranging authentication and ciphering in mobile communication system." This method focuses on data protection in a telecommunication system that includes multiple mobile communication networks. It involves ciphering traffic between the mobile station and the first mobile communication network using a first cipher key. The method also includes calculating a second cipher key for traffic between the mobile station and the second mobile communication network, ensuring secure communication across different networks.

Career Highlights

Throughout his career, Kari Virtanen has worked with prominent companies in the telecommunications industry, including Nokia Networks Oy and Nokia Mobile Phones Limited. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in mobile technology.

Collaborations

Kari has collaborated with notable professionals in the field, including Jukka Immonen and Juha Ala-Laurila. These collaborations have further enriched his work and have led to the development of groundbreaking technologies in telecommunications.

Conclusion

Kari Virtanen's contributions to telecommunications through his patents and collaborations highlight his role as an innovator in the industry. His work continues to influence the way mobile communication systems operate today.