NR Beam Reciprocity for Reliable Random Access

The patent performs beam correspondence determination in advance before random access procedures. The WTRU determines whether TRP TX and RX beams are reciprocal beforehand, allowing it to pre-select appropriate TX beams for uplink transmission. This preliminary action eliminates the need for complex real-time beam management during random access, as the beam selection is already optimized based on pre-determined correspondence relationships.

The WTRU autonomously determines its own TX beam selection based on beam correspondence information and downlink beam measurements. The device self-manages the beam reciprocity determination and uses this information to independently select optimal TX beams for random access preamble transmission, reducing the need for network-controlled beam management and thereby simplifying overall system complexity.

The patent determines beam correspondence information and selects appropriate TX beams before the random access procedure begins. By pre-determining which TX beams are suitable based on downlink beam measurements and beam correspondence status, the WTRU avoids time-consuming beam searching and evaluation during the actual random access process, thus maintaining high access reliability while minimizing processing time.

The patent changes the operational parameters based on beam correspondence determination. When beam correspondence is established, the WTRU uses specific TX beam selection strategies (e.g., using the same beam direction for TX as for DL reception). This parameter adaptation allows the system to efficiently select from multiple beams without exhaustive processing, balancing reliability with reduced computational overhead and time consumption.