5G • RAN
Search Space
PDCCH Search Space
Set of candidate CCE locations where a UE blindly decodes Downlink Control Information (DCI).
Technical Explanation
A Search Space links to a specific CORESET and defines when (monitoring periodicity, slot offset, symbol duration) and where (aggregation levels 1, 2, 4, 8, 16) a UE monitors PDCCH candidates. Two primary categories exist: Common Search Space (CSS) and UE-Specific Search Space (USS).
Key Functions
- Configures slot periodicity and symbol offsets for PDCCH monitoring
- Specifies number of blind decoding candidates per aggregation level
- Distinguishes Common (CSS) and UE-Specific (USS) control traffic
Specifications
3GPP TS 38.213
Interfaces
Uu
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