APPARATUS AND METHOD FOR ALLOCATING SUB-CHANNEL IN A ORTHOGONAL FREQUENCY DIVISION MULTIPLEXINGACCESS SYSTEM

摘要

A subchannel allocation apparatus and a method thereof for reducing the collision selecting an identical subchannel between users when assigning the subchannel in an orthogonal frequency division multiple access system are provided to allocate the resource of the subchannel according to the channel characteristics of the user. A base station confirms whether a user requests the allocation of the channel resource(300). If there is a user assigning the channel resource, the base station selects the user of the highest priority(302). The base station selects optimum subchannel of users(304). The base station confirms whether the contention occurs(306). The channel resource is allocated to the selected user(308).