tion Equal allocation Larger allocation interference. interferer Figure 11.2 Frequency frequency domain allocation allocations as of NAICS NAICS UE. UE (b) and Multiple dominant interferers with frequency overlap smaller equal allocations as NAICS UE situation when a single dominant interferer 11.2a. allocation A more is complex larger, situation equal or have smaller the than simpler the NAICS UE allocation, with as the shown allocation in Figure of one NAICS UE, if, for example, selective is when multiple interferers wideband overlap while the interferers are scheduled however, frequency this is not a the NAICS UE is scheduled have same or different point of origins; is that inter-eNodeB (Figure 11.2b). from the The eNodeB-to-UE interferers can signalling perspective same if time. the assumption problem signalling is available at operation the serving modes eNodeB are at depicted the in Figure 11.3. network Based assistance on the indicated for The basics of NAICS UE, the serving eNodeB is providing formed by two parts: the up RSRP from the NAICS NAICS semi-static signalling is information of cell to eight interfering cells. The eNodeB-to-UE signalling. The NAICS implemented TMs is inter-eNodeB of signalling CRS ports, and MBSFN the configuration, PA subset, to PB the and UE via RRC. In addition ID, transferred number via X2 between the eNodeBs and contain further information signalled on the resource allocation and the to precoding these parameters, granularity the utilized RRC message by the dominant may interferer. The NAICS UE further utilizes LTE Small Cell Optimization Maximum eight cells for interference signalling Cell ID no. CRS ports (1, 2, 4) Inter-eNB MBSFN config Interfering P PA subset of at eNB A signalling most 3 values backhaul Used TMs in eNB (TM1, 2, 3, 4, 6, 8, 9, 10) Int. 1 NAICS Serving eNB B Int. 2 Cell ID no. CRS ports (1,2,4) eNB2UE MBSFN config signalling by RRC P PA subset of at most 3 values Used TMs in eNB Cell ID (TM1, 2, 3, 4, 6, 8, 9, 10) no. CRS ports (1, 2, 4) Interfering Param