PDCCH-SSB Mapping for MBMS Beam Sweeping Reliability

The patent applies preliminary action by pre-configuring the correspondence between PDCCH monitor occasions and SSBs before actual MBMS transmission. The terminal device determines this mapping relationship in advance, allowing it to know exactly when and where to monitor for scheduling information corresponding to each beam. This pre-establishment of the mapping eliminates the need for complex real-time scheduling decisions during beam sweeping, thereby maintaining high transmission reliability while reducing scheduling complexity.

The patent applies local quality by establishing the PDCCH monitor occasion correspondence specifically and only for SSBs used in MBMS beam sweeping transmission, rather than for all system SSBs. The mapping is localized to the MBMS service context, creating a dedicated monitoring structure that ensures scheduling accuracy for MBMS traffic without unnecessarily increasing the overall number of monitor occasions system-wide. This targeted approach maintains precision where needed while controlling overhead.

The patent applies preliminary action by pre-determining the exact mapping between PDCCH monitor occasions and SSBs before MBMS transmission begins. The terminal device knows in advance which monitor occasion corresponds to which SSB, allowing it to efficiently jump to the correct monitoring positions without unnecessary searches or delays. This pre-established knowledge enables the device to monitor multiple occasions for reliability while minimizing the total time required, as it doesn't need to perform complex real-time mapping calculations.