Patent ID: 7493087

Claim:
An apparatus for a radio communication system comprising: means for receiving an access message transmitted from a subscriber unit to a base station; means for determining a distance characteristic between the subscriber unit and the base station using a propagation delay of the access message; means for receiving a measured signal to interference ratio of a signal of the base station data from the subscriber unit; means for determining an interference characteristic including an intra-cell interference factor and an inter-cell interference factor associated with the subscriber unit in response to the measured signal to interference ratio and the distance characteristic between the subscriber unit and the base station; and means for determining a resource requirement for achieving a desired signal to interference ratio in response to the interference characteristic; wherein the resource requirement of the means for determining a resource requirement is a relative downlink transmit power requirement given by: UserAdm = α ⁢ ( E b / N o ) PG ⁡ [ ( 1 - β ) + f ] wherein β is the intra-cell interference factor, ƒ is the inter-cell interference factor, E b /N o is the desired signal to noise ratio, α is the voice activity factor and PG is the processing gain given by PG = W UserBitRate where W is carrier chip rate and the UserBitRate is proportional to the spreading factor.