SearchSpaceId

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

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

First seen v15.0.0 (2018-01) · Last changed v15.1.0 (2018-04)

Definition

The IE SearchSpaceId is used to identify Search Spaces. The ID space is used across the BWPs of a Serving Cell. The search space with the SearchSpaceId = 0 identifies the search space configured via PBCH (MIB) and in ServingCellConfigCommon ( searchSpaceZero ). The number of Search Spaces per BWP is limited to 10 including the common and UE specific Search Spaces.

SearchSpaceId ::=                   INTEGER (0..maxNrofSearchSpaces-1)

Used by (4)

• BeamFailureRecoveryConfig
• PDCCH-Config
• PDCCH-ConfigCommon
• SearchSpace

Uses (1)

• maxNrofSearchSpaces-1

In the viewer

• Read SearchSpaceId in v19.4.0
• History of SearchSpaceId across versions
• All versions of TS 38.331
• ASN.1 index