Patent ID: 8139484
Filing Date: 2012-03-20
Classification: H04W

Abstract:
1. An unsolicited grant service (UGS) scheduling method with regard to a subscriber station (SS) and a base station (BS) that are disposed in a network in which an IEEE 802.16/Wibro system is realized, the method comprising: when the SS requires 1 through M (wherein M is a positive integer) UGS flows, and the BS serves 1 through N (wherein N is a positive integer) frames, the BS storing grant periods and guaranteed sizes that are granted to the M UGS flows in each N frame; the BS comparing service capacity of a frame and a sum of guaranteed sizes of each flow belonging to the N frames, and determining if an overload has occurred; after the comparing, a new flow of the SS transmitting a DSA-REQ message to the BS; after the comparing, excluding a frame in which the overload has occurred from a group of service frames; and calculating a least common multiple (LCM) period between the new flow of the SS and other flows belonging to a frame at a time the DSA-REQ message arrives at the BS, with regard to frames that are not excluded.