Systems and methods for control of a radio resource for packet data services are provided to facilitate radio resource management. One embodiment comprises a radio network element of a Packet-Switched (PS) network that serves User Equipment (UE). The radio network element determines a value for a summation of load contribution from one or more UEs, the load contribution for respective ones of the one or more UEs based on a minimum grant for the respective ones of the one or more UEs; and manages a radio resource based on the value of the summation. The minimum grant may be a grant required to transport a minimum transport block size. An example method may determine a color status based on the value of the summation with respect to a scale of virtual loading, and make a radio resource management decision concerning the radio resource based on the color status.