7.2.7 Zero Power CSI-RS Resource definition

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

For a serving cell and UE configured in transmission mode 1-9 and UE not configured with csi-SubframePatternConfig-r12 for the serving cell, the UE can be configured with one zero-power CSI-RS resource configuration. For a serving cell and UE configured in transmission mode 1-9 and UE configured with csi-SubframePatternConfig-r12 for the serving cell, the UE can be configured with up to two zero-power CSI-RS resource configurations. For a serving cell and UE configured in transmission mode 10, the UE can be configured with one or more zero-power CSI-RS resource configuration(s).

For a serving cell, the UE can be configured with up to 5 additional zero-power CSI-RS resource configurations according to the higher layer parameter ds-ZeroTxPowerCSI-RS-r12.

The following parameters are configured via higher layer signaling for each zero-power CSI-RS resource configuration:

– Zero-power CSI RS Configuration list (16-bit bitmap ZeroPowerCSI-RS in [3])

– Zero-power CSI RS subframe configuration except for aperiodic zero-power CSI-RS resource configuration. The allowable values are given in Clause 6.10.5.3 of [3].

A UE should not expect the configuration of zero-power CSI-RS and PMCH in the same subframe of a serving cell.

For frame structure type 1 serving cell, the UE is not expected to receive the 16-bit bitmap ZeroPowerCSI-RS with any one of the 6 LSB bits set to 1 for the normal CP case, or with any one of the 8 LSB bits set to 1 for the extended CP case.

For frame structure type 2 serving cell and 4 CRS ports, the UE is not expected to receive the 16-bit bitmap ZeroPowerCSI-RS with any one of the 6 LSB bits set to 1 for the normal CP case, or with any one of the 8 LSB bits set to 1 for the extended CP case.

A BL/CE UE configured with CEModeA or CEModeB is not expected to be configured with zero-power CSI-RS.