Device for providing hand-off quality of service of inter-access systems and ...

inn iiiiiii Hi mi mi iiiiijjiijii iiijiii im inn mi mi mi

(12) United States Patent

Baek et al.

(io) Patent No.: (45) Date of Patent:

US 7,894,815 B2 Feb.22, 2011

(54) DEVICE FOR PROVIDING HAND-OFF

QUALITY OF SERVICE OF INTER-ACCESS
SYSTEMS AND METHOD THEREOF

(75)

Inventors:

Seung-Kwon Baek, Daejeon (KR);
Bong-Ju Lee, Jeonju (KR); Jae-Su
Song, Daejeon (KR); Won-Ik Kim,
Seoul (KR); Ji-Soo Park, Daejeon (KR);
Soo-Chang Kim, Daejeon (KR);
Sung-gu Choi, Daejeon (KR);
Hyung-Sub Kim, Seoul (KR);
Yeon-Seung Shin, Daejeon (KR)

(73) Assignees: Electronics and Telecommunications
Research Institute, Daejeon (KR); SK
Telecom Co., Ltd., Seoul (KR); KT
Corporation, Seongnam (KR)

( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 930 days.

(21) Appl.No.: 11/544,831

(22) Filed: Oct. 5, 2006

(65) Prior Publication Data

US 2007/0115887 Al May 24, 2007

The present invention relates to a device for providing a quality of service (QoS) of a hand-off between heterogeneous networks, and a method thereof. According to the present invention, the device includes a device for performing a QoS management function for each access system and a device for performing a QoS management function between heterogeneous access systems in a network including a plurality of interlocked access systems. The device for performing the QoS management function for each access system manages a user service session, a local QoS of the access system, and a QoS context of the service session. The device for performing the QoS management function between the heterogeneous access systems negotiates the QoS of the service session and manages the QoS context when the hand-off is performed between the heterogeneous access systems, and performs a QoS mapping operation.

27 Claims, 7 Drawing Sheets