NEC · 10.8.2

NEC proposes studying all six sensing modes (TRP-TRP bistatic, TRP monostatic, TRP-UE bistatic, UE-TRP bistatic, UE-UE bistatic, UE monostatic) plus multi-static sensing for comprehensive integration requirement analysis. They propose reusing PRS and SRS with enhancements (expanded symbol counts to values of 1 or 8, new comb sizes {1,3,8}) as a starting point, and include DMRS as a sensing signal option citing its dense allocation, Doppler robustness, and multi-antenna support for high-mobility use cases like V2X, UAV tracking, and high-speed rail monitoring. They prioritize TDM-based resource allocation via a dedicated sensing resource pool, analogous to sidelink resource pool design within UL communication resources. For mono-static sensing, they propose a gap design after the sensing signal where gap length and sensing symbol length are determined by the maximum sensing range of the sensing node. They identify that ISAC path loss must be calculated on a per-path or per-path-group basis associated with the sensing target/object, distinguishing valid echo paths reflected by the target from invalid environment reflections, and propose a new sensing-specific PHR procedure fused with the existing communication PHR.