Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8656480 | Method for negotiating security-related functions of subscriber station in wireless portable internet system | Tae Yong Lee, Sun Hwa Lim, Chul Sik Yoon, Jun-Hyuk Song, Ji-Cheol Lee +1 more | 2014-02-18 |
| 8644233 | Method of transmitting control information and terminal thereof | Sung Cheol Chang, Kwang Jae Lim, Sung Kyung Kim, Chul Sik Yoon | 2014-02-04 |
| 8615218 | Method for requesting, generating and distributing service-specific traffic encryption key in wireless portable internet system, apparatus for the same, and protocol configuration method for the same | Ae-Soon Park, Chul Sik Yoon, Kyung Soo Kim, Jee-Hwan Ahn | 2013-12-24 |
| 8479270 | Method for allocating authorization key identifier for wireless portable internet system | Sung Cheol Chang, Chul Sik Yoon | 2013-07-02 |
| 8397071 | Generation method and update method of authorization key for mobile communication | Chul Sik Yoon | 2013-03-12 |
| 8160254 | Method for managing group traffic encryption key in wireless portable internet system | Chul Sik Yoon | 2012-04-17 |
| 8140054 | Method for authenticating subscriber station, method for configuring protocol thereof, and apparatus thereof in wireless portable internet system | Ae-Soon Park, Sun Hwa Lim, Yeong Jin Kim, Jee-Hwan Ahn | 2012-03-20 |
| 7978855 | Method for allocating authorization key identifier for wireless portable internet system | Sung Cheol Chang, Chul Sik Yoon | 2011-07-12 |
| 7907733 | Method for managing traffic encryption key in wireless portable internet system and protocol configuration method thereof, and operation method of traffic encryption key state machine in subscriber station | Sung Cheol Chang, Chul Sik Yoon | 2011-03-15 |