US 7,813,734 B2 *Oct. 12, 2010
6,055,427 A * 4/2000 Ojaniemi 455/436
6,266,530 Bl * 7/2001 Stalo 455/436
6,430,412 Bl* 8/2002 Hoggetal 455/436
6,507,567 Bl * 1/2003 Willars 370/321
FOREIGN PATENT DOCUMENTS
DE 19922177 Al 12/2001
Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems—Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands, Dec. 9, 2003.
Sungjin Lee et al., IEEE 802.16e HO Options for Forcing and Suggesting HO, Sep. 4, 2003.
Primary Examiner—George Eng
Assistant Examiner—Christopher M Brandt
(74) Attorney, Agent, or Firm—The Farrell Law Firm, LLP
U.S. PATENT DOCUMENTS 5,267,261 A 11/1993 Blakeney, II et al.
Disclosed is a method for recognizing by a Mobile Subscriber Station (MSS) whether a serving Base Station (BS) retains connection information in a mobile communication system including the serving BS for providing a service to the MSS and a target BS adjacent to the serving BS. The method includes the steps of receiving a handover request message from the serving BS, the handover request message including a resource remain type field representing whether the connection information having been set with the serving BS is retained, and a resource retain time field representing a connection information-retaining time by the serving BS, and recognizing that the serving BS retains the connection information during a time determined by a value of the resource retain time field.
11 Claims, 11 Drawing Sheets
BASE STATION LIST |