Rate-Matching Overlapping SS/PBCH and PDSCH Resources
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and receiving signals, particularly in scenarios where control channel and data channel resource allocations overlap with synchronization signal/broadcast channel transmission resources.
Innovation Solution
A method and apparatus for wireless communication systems that involve receiving information related to the time domain position of synchronization signal/physical broadcast channel (SS/PBCH) blocks and obtaining physical downlink shared channels (PDSCH) based on this information, while performing rate-matching in resource regions where PDSCH resource allocations overlap with SS/PBCH transmission resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PDSCH resource allocation overlaps with SS/PBCH transmission resources, then resource usage efficiency is improved, but signal transmission reliability deteriorates
Solution Approach 1:
The patent segments the resource allocation by identifying specific resource regions where PDSCH and SS/PBCH overlap, and applies rate-matching only to those specific overlapping regions rather than the entire resource allocation. This selective segmentation allows non-overlapping resources to be used efficiently while protecting overlapping resources from interference.
Solution Approach 2:
The patent applies different quality treatments to different resource regions: rate-matching is applied locally only to the overlapping resource regions between PDSCH and SS/PBCH, while non-overlapping regions maintain their original transmission quality. This local quality adjustment optimizes overall system performance by protecting only where necessary.
2Reliability
If rate-matching is performed in overlapping resource regions, then signal transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent simplifies device complexity by segmenting the rate-matching operation to apply only to overlapping resource regions identified through specific criteria (SS/PBCH candidate blocks), rather than requiring complex rate-matching across all possible resource allocations. This reduces computational burden while maintaining reliability.
Solution Approach 2:
The patent performs preliminary identification of SS/PBCH candidate blocks and their resource regions before executing rate-matching operations. By pre-determining which resource regions require rate-matching based on SS/PBCH candidate information, the system avoids complex real-time analysis during transmission, thereby reducing device complexity.
3Productivity
If PDSCH is obtained in overlapping resource regions, then resource usage efficiency is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent applies local quality differentiation by allowing PDSCH transmission in non-overlapping resource regions with full precision, while applying rate-matching in overlapping regions to maintain acceptable precision. This selective approach preserves resource usage efficiency by transmitting PDSCH wherever possible while maintaining precision where it matters most.
Solution Approach 2:
The patent converts the potential harm of resource overlap into a benefit by using the overlap information to guide rate-matching decisions. Instead of avoiding overlapping regions entirely (which would reduce resource efficiency), the system utilizes the overlap identification to apply targeted rate-matching, thereby converting the problematic overlap into an opportunity for optimized resource allocation.
Data Source
AI summary
The various embodiments relate to a method carried out by a terminal in a wireless communication system, and a device supporting same, where first and second information is received, and the first information relates to a time domain position of a transmitted synchronization signal/physical broadcast channel (SS/PBCH) block among a plurality of candidate SS/PBCH blocks and the second information relates to a quasi co-location (QCL) relationship for the transmitted SS/PBCH block. A physical downlink shared channel (PDSCH) based on the first information and the second information is obtained; however, it is specifically obtained in a resource region in which the resource for the PDSCH and a resource for a candidate SS/PBCH block which does not have a QCL relationship with the transmitted SS/PBCH block overlap with each other.