R1-2601765
LS in
LS on early indication via RACH partitioning
From Qualcomm
Summary
RAN2 has identified excessive RACH resource partitioning in 5G NR due to early indication of features via Msg1, leading to inefficiency and complex configurations. They request RAN1 to consider studying which RACH features truly need Msg1 indication versus those that can wait for Msg3 or later in 6G design, proposing that RACH partitioning should be used only when truly necessary. The document contains 1 action requested of RAN1.
Position
Qualcomm (as RAN2 source) identifies excessive partitioning of RACH resources in 5G NR due to early indication of RACH features and their combinations via Msg1 as a design pitfall to avoid in 6G. They propose studying which RACH features absolutely need Msg1 indication versus which can wait for Msg3 or later. They require that RACH partitioning be used only when it is truly necessary.
Key proposals
- Proposal 1 (Section 2): RAN2 asks RAN1 to take into its design considerations that RACH partitioning should be used only when it is truly necessary.
- Proposal 2 (Section 1): RAN2 has agreed to study which RACH features absolutely need Msg1 indication and which can wait for Msg3 or later.