6G in Dalian: What the Latest 3GPP Meetings Reveal About the Future Radio and Network

Key Takeaways

• TDD lower‑tier 6G devices get a firm 20 MHz bandwidth recommendation.
• FDD uplink bandwidth remains open, tied to SAW‑less UE feasibility.
• 6G will retain NR waveforms, adding multi‑layer DFT‑s‑OFDM uplink.
• New LDPC base graph (BG3) targets 3‑14 Gbps per carrier for peak rates.
• RAN‑CN interface decision (point‑to‑point vs. service‑based) slated for June plenary.

Pulse Analysis

The Dalian session marked a turning point for 6G’s physical layer, where the 3GPP community moved from exploratory drafts to concrete specifications. By locking in a 20 MHz bandwidth for TDD low‑tier devices, the standard sets a clear baseline for cost‑sensitive IoT and wearable markets. Meanwhile, the unresolved FDD uplink bandwidth hinges on the feasibility of SAW‑less front‑ends, a factor that could slash modem complexity by up to 60 % for multi‑band devices. This split underscores how hardware realities continue to drive protocol choices, even as the industry eyes ultra‑high‑speed use cases.

Beyond the PHY, the meetings highlighted a strategic shift toward simplification. Retaining the proven NR waveforms while extending DFT‑s‑OFDM to support two‑layer MIMO reflects a desire to boost uplink capacity without reinventing the stack. The proposal of a new LDPC base graph (BG3) aims to push per‑carrier data rates into the multi‑gigabit realm, aligning with visions of terahertz‑band operation and massive antenna arrays. These moves suggest that 6G will prioritize backward compatibility and incremental enhancements over radical redesigns, easing the transition for equipment vendors.

The most consequential outcome, however, lies in the upcoming June plenary where the RAN‑CN interface and CU‑DU split will be decided. A point‑to‑point architecture promises lower latency and tighter integration, appealing to traditional operators, while a service‑based interface aligns with cloud‑native, AI‑driven network models championed by newer entrants. The choice will dictate not only the technical roadmap but also the business models for future deployments, influencing everything from capex allocation to ecosystem partnerships. Stakeholders should monitor the evaluation criteria being refined now, as they will ultimately tip the balance in this pivotal architectural vote.