Patent ID: 7391750

Claim:
A method for dynamically allocating a frame cell (FC)/subchannel in a mobile communication system that divides an entire frequency band into a plurality of sub-frequency bands and includes a plurality of FCs having a frequency domain and a time domain, occupied by a plurality of subchannels each of which is a set of a number of sub-frequency bands, the method comprising the steps of: receiving, by an access point, on an FC-by-FC basis, channel quality information (CQIs) fed back from a plurality of access terminals, and storing the CQIs according to a reception order of the CQIs; transmitting, by the access point, an FC/subchannel change request including the stored CQIs at least one access terminal to an access router when FCs/subchannels currently in use by at least one access terminal need to be reallocated based on the CQIs; allocating, by the access router, an FC/subchannel set by selecting a number of FCs/subchannels according to a predetermined method for the at least one access terminal after receiving the FC/subchannel channel change request, and transmitting information related to the allocated FC/subchannel set to the access point; ordering, by the access router, the at least one access terminal according to the reception order of the CQIs in the received FC/subchannel change requests after receiving the FC/subchannel channel change request; sequentially allocating, by the access router, a number of the FCs/subchannels as a FCs/subchannels set according to the ordering result; transmitting information related to the allocated FCs/subchannels set to the access point; and selecting and allocating, by the access point, a particular FC/subchannel from among FCs/subchannels in the FC/subchannel set information received from the access router for the at least one access terminal based on CQIs last received from the at least one access terminal.