tric to reflect the benefit achieved if an eNodeB would follow the suggested allocation given by (((c)(3)()) X2AP: RSRP and CoMP Hypothesis Serving eNodeB Interfering eNodeB Finetune downlink scheduler CSI/CQI and RSRP resource allocations Measurement report Empty PRBs Figure 3.4 Scheduler coordination with enhanced CoMP in Release 12 LTE-Advanced Evolution in Releases 12-13 Impact of cell coordination to average capacity Result 1 Result 2 Result 3 Result 4 Result 5 Result 6 Figure 3.5 Cell average capacity performance with scheduler coordination from different companies as given in [5] with high resource utilization and nine cells coordinated the hypotheses. The eNodeB is not mandated to follow the suggestion (and it may receive signalling from multiple eNodeBs suggesting conflicting allocations) but it is left for the eNodeB scheduler implementation how to reflect the hypothesis in the eNodeB scheduling and other radio resource management functionality. Reference Signal Receiver Power (RSRP) measurements as reported by the UE. The RSRP measurement result obtained from the UEs can be used similar to aid the scheduler and RRM operation and also to validate some of the hypothesis information. Further the enhancements in Release 13 are expected to include, as described in [6], and work to be finalized by the end of 2015 in 3GPP: Sending UE CSI/CQI information over X2 interface between the eNodeBs. This allows the scheduler coordination operation to see also the frequency domain feedback as provided by the UEs in the neighbouring cell. Release 12 CoMP hypotheses can of course reflect this as desired to be taken into account by the actual serving eNodeB. If UE CSI/CQI information would be provided with frequent interval for large number of UEs over X2 interface, then care must be taken in order not to overload the X2 interface. Enhanced Relative Narrow-Band Transmit Power (RNTP), which in Release 8 provides more limited information of the transmitter power per each 180 kHz wide Physical Resource Blocks. 3.4 FDD-TDD C