5G • RAN
RLC TM
Radio Link Control Transparent Mode
Stateless RLC mode adding zero header overhead, used for broadcast control channels (BCCH, PCCH).
Technical Explanation
In Transparent Mode (TM), the RLC layer performs no segmentation, concatenation, or sequence numbering. Data passes through completely transparently with zero header overhead. It is used exclusively for broadcast control channels: BCCH (MIB/SIBs) and PCCH (Paging).
Key Functions
- Introduces zero protocol header overhead
- No segmentation, reassembly, or error correction
- Used strictly for broadcast system information (BCCH) and paging (PCCH)
Specifications
3GPP TS 38.322
Interfaces
Uu
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