5G • RAN
t-Reassembly
RLC Reassembly Timer
Timer preventing the RLC receiver from waiting indefinitely for missing out-of-order sequence numbers.
Technical Explanation
When an RLC AM/UM receiver detects a gap in sequence numbers, it starts t-Reassembly. While running, the receiver holds out-of-order PDUs in memory awaiting the missing packets. If the timer expires, the receiver stops waiting, delivers complete SDUs to upper layers, and in AM mode, sends an RLC Status PDU requesting retransmission.
Key Functions
- Limits receiver buffering time for missing out-of-order packets
- Prevents receiver buffer bloat and excessive reordering delays
- Triggers RLC Status PDU generation in Acknowledged Mode
Specifications
3GPP TS 38.322
Interfaces
Uu
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