LTE RLC Sub Layer Functions (Work of the RLC protocol in LTE): Main task of LTE RLC sub layer is transfer PDUs in three modes of LTE upper layer.
RLC Sub Layer Functions
- Protocol Data Units (PDUs) Transfer in upper layer any of three modes: Acknowledged Mode (AM), Unacknowledged Mode (UM) and Transparent Mode (TM)
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- For AM data transfer correction of Error through ARQ (automatic repeat request )
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- In Unacknowledged Mode – UM and Acknowledged Mode – AM : RLC SDUs Concatenation, segmentation and reassembly.
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- RLC data PDUs AM – Acknowledged Mode for Re-segmentation
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- Reordering of RLC data PDUs in Unacknowledged Mode and Acknowledged Mode
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- Duplicate detection in Unacknowledged Mode and Acknowledged Mode.
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- RLC SDU discards in both Unacknowledged Mode and Acknowledged Mode.
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- RLC re-establishment in LTE
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- Protocol error detection and recovery in LTE
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