9.1.3 Control Format Indicator (CFI) assignment procedure

36.2133GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Physical layer proceduresRelease 17TS

For a serving cell, if a UE is configured with higher layer parameter cfi-SlotSubslotNonMBSFN, the UE shall assume the CFI is equal to the value of the higher layer parameter cfi-SlotSubslotNonMBSFN for non-MBSFN subframes for receiving physical downlink shared channel with slot/subslot duration.

For a serving cell, if a UE is configured with higher layer parameter cfi-SlotSubslotMBSFN, the UE shall assume the CFI is equal to the value of the higher layer parameter cfi-SlotSubslotMBSFN for MBSFN subframes for receiving physical downlink shared channel with slot/subslot duration.

For a serving cell using frame structure 2, if a UE is configured with higher layer parameter cfi-PatternSlotSubslot, the UE shall assume the CFI is equal to the value of the higher layer parameter cfi-PatternSlotSubslot for the subframes for receiving physical downlink shared channel with slot duration.

For a serving cell, if a UE is configured with higher layer parameter cfi-SubframeNonMBSFN, the UE shall assume the CFI is equal to the value of the higher layer parameter cfi-SubframeNonMBSFN for non-MBSFN subframes for receiving physical downlink shared channel with subframe duration.

For a serving cell, if a UE is configured with higher layer parameter cfi-SubframeMBSFN, the UE shall assume the CFI is equal to the value of the higher layer parameter cfi-SubframeMBSFN for MBSFN subframes for receiving physical downlink shared channel with subframe duration.

For a serving cell using frame structure 2, if a UE is configured with higher layer parameter cfi-PatternSubframe, the UE shall assume the CFI is equal to the value of the higher layer parameter cfi-PatternSubframe for the subframes for receiving physical downlink shared channel with subframe duration.

For a serving cell, if a UE is configured with higher layer parameters cfi-SubframeNonMBSFN and cfi-SlotSubslotNonMBSFN, the UE is not expected to be configured with different values of cfi-SlotSubslotNonMBSFN and cfi-SubframeNonMBSFN.

For a serving cell, if a UE is configured with higher layer parameters cfi-SubframeMBSFN and cfi-SlotSubslotMBSFN, the UE is not expected to be configured with different values of cfi-SlotSubslotMBSFN and cfi-SubframeMBSFN.

For a serving cell using frame structure 2, if a UE is configured with higher layer parameters cfi-PatternSlotSubslot and cfi-PatternSubframe, the UE is not expected to be configured with different values of cfi-PatternSlotSubslot and cfi-PatternSubframe.

PHICH duration is signalled by higher layers according to Table 6.9.3-1 in [3]. The duration signalled puts a lower limit on the size of the control region determined from the control format indicator (CFI). When , if extended PHICH duration is indicated by higher layers then the UE shall assume that CFI is equal to PHICH duration.

In subframes indicated by higher layers to decode PMCH, when , a UE may assume that CFI is equal to the value of the higher layer parameter non-MBSFNregionLength [11].

For a MBMS-dedicated cell, if a UE is configured with higher layer parameter semiStaticCFI-MBMS included in MasterInformationBlock-MBMS, the UE shall assume the CFI is equal to the value of the higher layer parameter semiStaticCFI-MBMS for non-MBSFN subframes if a non-zero value is indicated by semiStaticCFI-MBMS.