Patent ID: 7970906

Claim:
A method for allocating resources by a Base Station (BS) in a wireless communication system, the method comprising: transmitting a resource allocation message including a resource move indicator indicating whether it is possible to shift at least one persistently allocated resource slot of one or more persistently allocated resource slots to persistently allocate at least one resource slot among a plurality of resource slots to corresponding one or more Mobile Stations (MSs); when at least one persistently allocated resource slot of the one or more persistently allocated resource slots is de-allocated, transmitting a message including information on the at least one de-allocated resource slot and the resource move indicator, to at least one MS; and when the resource move indicator is enabled, determining whether to shift a location of at least one of the one or more of persistently allocated resource slots, wherein the determining of whether to shift the location of the at least one of the one or more persistently allocated resource slots comprises: determining whether a hole is created due to the de-allocation among the one or more persistently allocated resource slots not de-allocated; and when the hole is created, determining to shift the location of at least one of the one or more non-de-allocated persistently allocated resource slots.