UE PUSCH Transmission Scheduling with Non-Serving Cell SSB
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Solution Overview
Problem
In wireless communication systems, particularly in 5G and 6G networks, there is a need for a procedure to repeatedly perform uplink transmission to expand cell coverage in the ultra-high frequency (mmWave) band.
Innovation Solution
A method for a user equipment (UE) to transmit a physical uplink shared channel (PUSCH) involves receiving synchronization signal block (SSB) configurations for both serving and non-serving cells, determining available slots for repeated PUSCH transmission, and identifying overlaps between SSBs and the resource mapped to the PUSCH. The UE then drops the PUSCH transmission during the overlapping slot and receives the SSBs from the serving and non-serving cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the UE performs repeated PUSCH transmission to expand uplink coverage, then uplink coverage is improved, but resource conflicts with SSB reception occur
Solution Approach 1:
The UE performs preliminary identification of resource overlaps between PUSCH transmission slots and SSB reception slots before actual transmission. By determining in advance which slots contain SSB transmissions from serving and non-serving cells, the UE can proactively drop PUSCH transmissions in those slots, preventing resource conflicts and ensuring successful SSB reception while maintaining coverage enhancement through repeated transmissions in non-conflicting slots.
2Adaptability or versatility
If the UE receives SSB from non-serving cell, then cell reselection capability is improved, but transmission reliability deteriorates due to resource overlap
Solution Approach 1:
The UE identifies in advance the time-frequency resources occupied by SSB transmissions from both serving and non-serving cells. By performing this preliminary resource identification, the UE can make informed decisions to drop PUSCH transmissions only in slots where SSB reception is required, thereby maintaining reliable uplink transmission in other slots while still enabling cell reselection through non-serving cell SSB reception.
Solution Approach 2:
The UE dynamically adjusts its PUSCH transmission strategy based on the detected SSB schedule from non-serving cells. Rather than using a static transmission pattern, the UE adapts its transmission behavior slot-by-slot, dropping transmissions only when SSB reception is required and maintaining transmissions otherwise, thus achieving both reliable transmission and enhanced cell reselection capability.
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The method for a terminal may comprise the operations of: receiving SSB configurations related to first and second SSBs, which correspond to a serving cell and a non-serving cell, respectively, and have different PCIs; determining valid slots for repeated PUSCH transmissions by considering both the first SSB corresponding to the serving cell and the second SSB corresponding to the non-serving cell according to the SSB configurations; identifying that the first SSB and/or the second SSB overlaps, in the first slot of the valid slots, with the resource to which PUSCH is mapped; dropping the transmission of the PUSCH in the first slot in response to the identification, and receiving the first SSB and/or the second SSB through the serving cell and/or the non-serving cell.