Patent ID: 7720483
Filing Date: 2010-05-18
Classification: H04L

Abstract:
1. An apparatus capable of assigning sub-channels in an Orthogonal Frequency Division Multiplexing Access (OFDMA) system with a plurality of sectors, comprising: a plurality of sector channel management parts, each sector channel management part assigning channels having assignable channel indexes in response to requests from users in a sector managed by the respective sector channel management part, and reporting sector load information regarding a total number of the requests from the users in the sector and channel quality information that includes signal to noise ratios for each of the channels currently in use; and a channel assignment scheduler, the channel assignment scheduler using the sector load information and the channel quality information reported from each of the channel management parts to calculate a number of assignable channels per class for each of the sectors, to determine the assignable channel indexes per class for each of the sectors according to the number of assignable channels, and to forward the assignable channel indexes to each of the sector channel management parts. wherein said class is a group consisting of channels to be assigned to a same number of sectors, and wherein each of the sector channel management parts generates and reports the sector load information on every frame, and wherein the channel assignment scheduler generates the assignable channel indexes for each of the sectors for every frame and forwards the assignable channel indexes to each of the sector channel management parts.