R1-2600108
discussion
Discussion on channel coding for 6GR
From Spreadtrum
Summary
This document from Spreadtrum/UNISOC presents three proposals on 6G channel coding, focusing on LDPC extension for data channels and Polar code extension for control channels, emphasizing minimal impact on existing hardware/software and prioritizing backward-compatible solutions.
Position
Spreadtrum/UNISOC proposes that LDPC extension for 6G should maintain high consistency with existing NR LDPC, with only minor software or hardware modifications, and argues implementation-based solutions should receive priority consideration if they can meet data rate requirements. They specifically propose prioritizing reduction of the maximum number of iterations without significantly affecting performance for data channel coding. For control channel coding, they propose directly reusing NR Polar code design for control information within NR range, and if DCI payload size must exceed the 164-bit limit, they propose removing the D-CRC interleaver and reusing the existing 1024 sequence for UCI to extend the DCI payload upper bound.
Key proposals
- Proposal 1 (Data channel coding): The LDPC extension should have minimal impact on either software or hardware.
- Proposal 2 (Data channel coding): Implementation based solutions and reduction of the maximum number of iterations should be given priority.
- Proposal 3 (Control channel coding): If the final maximum DCI payload size exceeds 164 bits, the D-CRC interleaver can be removed and then reuse the existing 1024 sequence for UCI to extend DCI payload upper bound.