Merge remote-tracking branch 'arora-sagar/roadmap' into integration_2026_w25

RAN and UE Roadmap (#206)

Reviewed-by: Robert Schmidt <robert.schmidt@openairinterface.org>

ROADMAP.md

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+# Duranta-OpenAirInterface Roadmap
+
+## RAN Roadmap
+
+### Q2 2026
+
+- GPU LDPC Accelerator
+- NR-DC Support
+- CN Paging procedures
+- Support for 64 UEs with E2E throughput validation
+- Basic Cat-A OAI O-RU (simulated radio)
+
+### Q3 2026
+
+- QoS-enforcing scheduler
+- Xn Handover Support
+- UL MU-MIMO
+- Aperiodic UL channels (SRS/CSI reporting)
+- NR user plane protocol
+- Multi-cell support in L2
+- Support for 128 UEs with E2E throughput validation
+
+### Q4 2026
+
+- Cat-B Support for FHI 7.2 at RU/DU
+- RAN Paging
+- Support of 5G RAN Slicing
+- Multi-cell performance evaluation (with at-least 3 cells)
+
+### Q1 2027
+
+- Digital Beamforming Support
+- DL MU-MIMO at L1
+
+---
+
+## UE Roadmap
+
+### Q2 2026
+
+- Support for Handover Procedures
+- Basic Sidelink Procedures (PSSCH, PSCCH)
+- PUCCH formats 1&3
+
+### Q3 2026
+
+- Support for 2 UL layers
+- Support for 2 DL layers
+- RU sharing
+
+### Q4 2026
+
+- Reduce feedback time
+- AT command interface
+- DL KPI Improvements
+- UL KPI Improvements
+
+### Q1 2027
+
+- Scan carrier
+- Power control procedures for outdoor operation