SSB-ToMeasure

RRC IE · TS 38.331 v19.4.0 (2026-09) · clause 6.3.2

SSB-ToMeasure is an RRC information element of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.

First seen v15.1.0 (2018-04) · Not changed since

Definition

The IE SSB-ToMeasure is used to configure a pattern of SSBs. For operation with shared spectrum channel access in FR1, only mediumBitmap is used, and for FR2-2, longBitmap is used.

SSB-ToMeasure ::=                   CHOICE {
    shortBitmap                         BIT STRING (SIZE (4)),
    mediumBitmap                        BIT STRING (SIZE (8)),
    longBitmap                          BIT STRING (SIZE (64))
}

Fields (3)

Field	Description
shortBitmap BIT STRING (SIZE (4))	Bitmap when maximum number of SS/PBCH blocks per half frame equals to 4 as defined in TS 38.213 [13], clause 4.1.
mediumBitmap BIT STRING (SIZE (8))	Bitmap when maximum number of SS/PBCH blocks per half frame equals to 8 as defined in TS 38.213 [13], clause 4.1. For operation with shared spectrum channel access, if the k-th bit is set to 1, the UE assumes that one or more SS/PBCH blocks within the SMTC measurement duration with candidate SS/PBCH block indexes corresponding to SS/PBCH block index equal to k – 1 may be transmitted; if the kt-th bit is set to 0, the UE assumes that the corresponding SS/PBCH block(s) are not transmitted. The k-th bit is set to 0, where k > ssb-PositionQCL-Common and the number of actually transmitted SS/PBCH blocks is not larger than the number of 1's in the bitmap. If ssb-PositionQCL is configured with a value smaller than ssb-PositionQCL-Common , only the leftmost K bits (K = ssb-PositionQCL ) are applicable for the corresponding cell.
longBitmap BIT STRING (SIZE (64))	Bitmap when maximum number of SS/PBCH blocks per half frame equals to 64 as defined in TS 38.213 [13], clause 4.1. For operation with shared spectrum channel access in FR2-2, if the k-th bit is set to 1, the UE assumes that one or more SS/PBCH blocks within the SMTC measurement duration with candidate SS/PBCH block indexes corresponding to SS/PBCH block index equal to (k– 1) may be transmitted; if the k-th bit is set to 0, the UE assumes that the corresponding SS/PBCH block(s) are not transmitted.

SSB-ToMeasure

Definition

Fields (3)

Used by (7)

In the viewer