 to get accurate interference measurements to eNodeB, the UE feedback reporting modified with eICIC. The channel state information (CSI) feedback includes CQI, rank indicator (RI) and precoding matrix indicator (PMI). CQI is used for the link adaptation and the packet scheduling. eICIC causes fast changes in the interference levels by switching on and off the macro cell transmission. Release 10 UE can be configured to perform time-domain- restricted measurements. The principle is that small cell UEs are requested to provide two separate CQI reports: one corresponding to the normal subframes and another one corre- sponding to ABS. Similarly, the network can also configure time-domain restrictions for RRM measurements such as reference symbol received quality (RSRQ). The latter can, for instance, be used for macro-UEs to make more accurate handover to pico, such that the RSRQ on the pico is measured only during subframes where the macro is using ABS. The latter offers sim- ple, yet efficient, interference-aware load balancing between the macro and pico cells as also illustrated in [3]. Finally, time-domain measurement restrictions can also be configured for radio link monitoring (RLM). As an example, configuration of RLM measurement restrictions is useful for pico users that are typically able to receive service during subframes where the macro uses ABS. Without configuration of RLM measurement restrictions, such pico users would risk triggering undesirable radio link failures. All of the aforementioned measurement restrictions for Release 10 UEs are configured with radio resource control (RRC) messages as specified and are therefore only applicable for connected mode UEs. We can note that Release 8 and 9 UEs do not support measurement restrictions and the estimated interference is averaged in time domain across non-ABS and ABS subframes. The CQI reported by legacy UEs and by Release 10 UEs is shown in Figure 7.10. CRS is also transmitted from the macro cell during ABS causing some interference to the pico cell UEs