Group scheduling method, method for selectively receiving information elements according to group scheduling, and mobile communication terminal

A method of a base station of group scheduling for scheduling allocation of resources to a plurality of mobile stations by dividing the plurality of mobile stations (MSs) into groups, the method comprising:

• transmitting a Downlink Channel Descriptor (DCD) message including a total number of groups for the group scheduling;
• receiving ranging requests from the plurality of MSs;
• calculating a group identifier (ID) for each of the plurality of MSs using the total number of groups for the group scheduling and Media Access Control (MAC) addresses extracted from the received ranging requests;
• determining whether each of the plurality of MSs is to transmit real-time traffic data or non-real-time traffic data;
• selecting a first set of MSs comprising the MSs that are to transmit real-time traffic data for the group scheduling;
• enabling one or more index elements in a first group index corresponding to one or more groups to which the first set of MSs belong;
• selecting one or more groups for a remaining group scheduling if available resources are present after completing a resource allocation to the one or more groups to which the first set of MSs data belong;
• selecting a second set of MSs comprising one or more MSs that are to transmit non-real-time traffic data for the group scheduling;
• enabling one or more index elements in a second group index corresponding to the one or more groups to which the second set of MSs belong,
• wherein the second group index comprises a plurality of index elements, each of the plurality of index elements having a length of 1 bit and corresponding to one of the groups;
• and
• transmitting a MAP comprising:
• a group allocation information element including a group index having enabled index elements together with one or more not enabled index elements;
• and
• one more connection IDs (CIDs) of the selected MSs,
• wherein enabling the one or more index elements in the first group index corresponding to the one or more groups to which the first set of MSs belong comprises setting an index element having a length of 1 bit in the first group index corresponding to a group indicated by at least one of the calculated group IDs.