Method and apparatus for scheduling uplink data transmission using UE-ID in a mobile communication system supporting uplink packet data service

An apparatus for scheduling uplink data transmission for user equipment (UE) in a mobile communication system supporting an uplink packet data service, comprising:

• an absolute grant (AG) receiver for receiving from a Node B, an AG indicating the absolute value of an allowed maximum data rate for uplink data transmission;
• a controller for managing a pre-assigned first and second UE-IDs, setting a relative grant (RG) reception mode to ON if the AG has the first UE-ID and the RG reception mode to OFF if the AG has the second UE-ID, and determining the allowed maximum data rate for uplink data transmission according to the one of AG and RG;
• and
• an RG receiver for receiving an RG from the Node B, when the RG reception mode is set to ON.

A method of scheduling uplink data transmission for user equipment (UE) in a Node B of a mobile communication system supporting an uplink packet data service, comprising the steps of:

• allocating a first UE-ID and a second UE-ID for scheduling uplink data transmission;
• determining an allowed maximum data rate for the UE, selecting one of the first or second UE-IDs to notify the UE of the allowed maximum data rate, the first UE-ID indicating reception of a relative grant (RG) indicating a change in the allowed maximum data rate and the second UE-ID indicating non-reception of the RG;
• generating an absolute grant (AG) indicating the allowed maximum data rate and adding the selected UE-ID to the AG;
• and
• transmitting the AG with the selected UE-ID to the UE.

An apparatus for scheduling uplink data transmission for user equipment (UE) in a Node B of a mobile communication system supporting an uplink packet data service, comprising:

• a scheduler for managing first and second UE-IDs allocated for scheduling of uplink data transmission, determining an allowed maximum data rate for the UE and selecting one of the first or second UE-IDs to notify the UE of the allowed maximum data rate, the first UE-ID indicating reception of a relative grant (RG) indicating a change in the allowed maximum data rate and the second UE-ID indicating non-reception of the RG;
• a rate information generator for generating an absolute grant (AG) indicating the allowed maximum data rate;
• an adder for adding the selected UE-ID to the AG;
• and
• a transmitter for transmitting the AG with the selected UE-ID to the UE.