US 7,587,212 B2
System and method for allocating ranging slots in a broadband wireless access communication system
Hyun-Jeong Kang, Seoul (Korea, Republic of); Chang-Hoi Koo, Seongnam-si (Korea, Republic of); Jung-Je Son, Seongnam-si (Korea, Republic of); and Bongseog Jang, Jeollanam-do (Korea, Republic of)
Assigned to Samsung Electronics Co., Ltd, (Korea, Republic of)
Filed on Jan. 09, 2006, as Appl. No. 11/328,383.
Claims priority of application No. 10-2005-0001968 (KR), filed on Jan. 08, 2005.
Prior Publication US 2006/0153131 A1, Jul. 13, 2006
Int. Cl. H04Q 7/00 (2006.01)
U.S. Cl. 455—510  [455/509; 455/512; 455/513; 455/500; 455/403; 370/208; 370/210; 370/329; 370/462; 370/330] 25 Claims
OG exemplary drawing
 
20. A system for performing ranging according to a ranging slot allocation period in a broadband wireless access (BWA) communication system including a base station (BS) and a mobile station (MS), the system comprising:
the BS for counting a number of MSs that succeeded in ranging in a current frame, determining a ranging slot occupation ratio in the current frame, determining an average slot occupation ratio up to the current frame depending on an average slot occupation ratio up to a previous frame and the slot occupation ratio of the current frame, comparing the average slot occupation ratio up to the current frame with a threshold, and decreasing a ranging slot allocation period if the average slot occupation ratio up to the current frame is greater than the threshold; and
the MS for receiving an uplink MAP (UL-MAP) of the current frame being broadcasted from the BS, analyzing ranging information including the ranging slot allocation period, and performing ranging depending on the analyzed ranging information.