ithin a URA area and only sends an update if a URA area changes or it has data to transfer. In both Cell PCH and URA PCH the network indicates that it has something to transfer by sending paging to make UEs move to the Cell_FACH state. Load and Admission Control Load control functionality in every Node B measures the existing load. In the Nokia system the load measurements are total received UL interference on the uplink and total transmitted power in the downlink. The load control functionality in the WBTS transmits the load information about the UL and DL loads the RNC. The frequency of how often the load information is sent by the BTS is controlled by the radio resource indication (RRI) period. The UL load is the total received power and the DL load is the total transmitted power. Admission control (AC) functionality is designed to guarantee the quality for existing users at the expense of new users entering the cell. In the case of resource limitation AC prevents new CS users entering the cell. Admission control works independently, both in the uplink and downlink directions. In Radio Network Planning and Optimisation addition to the load radio interface, admission control is based on the available code, hardware channel and transmission resources. If any resource has a shortage the admission control takes preventive action. The most important parameters related to load and admission control functionality are the load thresh- olds, which determine when the admission control actions take place. The wideband power based load approach defines the received uplink interference as the uplink load; the corresponding downlink load measurement is the total transmission power of the base station. The load target in the uplink direction is defined as the offset from the noise floor. The uplink noise floor is the measured uplink interference when the system is considered to be unloaded. The noise rise is the amount of interference generated by the load. For example, if the uplink load target is set to be 4 dB the uplink 