Scrambling Initialization for MIMO Interference Reduction

The patent applies local quality by making the scrambling sequence specific to each TRP through TRP-specific initialization information. Different TRPs use different scrambling sequences generated with their own unique initialization values, which allows each TRP's data stream to have distinct local characteristics while maintaining overall system coherence. This resolves the interference issue by differentiating the scrambling sequences at the local TRP level without requiring complex system-wide changes.

The patent changes the initialization information parameters for scrambling in the two-step random access process. Specifically, it uses preamble-specific initialization information that is derived from the preamble sequence or preamble index, rather than using traditional UE-ID-based initialization. This parameter change allows the terminal to generate distinct scrambling sequences for different preambles, improving detection performance under collisions while maintaining operational simplicity through standardized parameter derivation rules.

The patent applies preliminary action by pre-defining the relationship between preambles and initialization information. The network configures preamble-specific initialization information in advance through RRC signaling or system information, and the terminal stores this mapping information locally. This preliminary setup eliminates the need for complex real-time calculations during the random access process, as the terminal can directly use the pre-configured initialization information corresponding to its selected preamble, thereby reducing processing complexity while maintaining improved detection performance.