ZTE · 10.5.3.2

ZTE proposes a lean and streamlined 6GR SRS design where one SRS resource or transmission can be dynamically reused for multiple usages, including UL CSI acquisition, DL CSI acquisition, and beam management, to avoid the inefficiency of 5G NR's separate configurations per usage. ZTE requires explicit antenna port mapping mechanisms between SRS ports and PUSCH, PUCCH, and DL Rx ports to ensure UL Tx coherency, port selection, and accurate DL CSI acquisition. ZTE argues that the 5G NR nested tree-like frequency hopping pattern is infeasible for wide-band CSI acquisition due to phase discontinuity and channel aging, and proposes introducing a successive frequency hopping pattern as a supplement, supported by BLER and SE simulation gains. ZTE questions the necessity of SRS carrier switching in 6G to avoid redundant features and requires that SRS carrier switching mechanisms not be considered for the non-CA single CC operation of DL CBW 400MHz around 7GHz. ZTE presents simulation results showing AI/ML-based SRS with comb-12 achieves comparable performance to legacy comb-4 SRS but proposes a feasibility study focusing on labeled data construction, model scalability/generalization, and computational complexity.