PDSCH Reference Signal Puncturing for Resource Overlap
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Solution Overview
Problem
Wireless communication systems face challenges in handling collisions between demodulation reference signals and resource elements not allocated for the physical downlink shared channel, leading to inefficient frequency bandwidth resource allocation and restricted scheduling of physical downlink shared channels.
Innovation Solution
User equipment (UE) identifies overlaps between allocated and unavailable frequency resources, determines remaining resources, and processes them based on a reference signal processing configuration to handle collisions and optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE processes all allocated frequency resources for the reference signal, then the reference signal processing is complete and accurate, but resources are wasted when some frequency resources are unavailable for scheduling
Solution Approach 1:
The patent segments the frequency resources allocated for the reference signal into two distinct sets: a first set of frequency resources that are available for scheduling, and a second set of frequency resources that are unavailable for scheduling. This segmentation allows the UE to selectively process only the relevant first set of frequency resources, avoiding waste of processing energy on unavailable resources while maintaining complete and accurate reference signal processing on the available resources.
2Reliability
If the system restricts scheduling to avoid collisions between reference signals and unavailable resources, then reference signal processing reliability is maintained, but scheduling flexibility and resource utilization are reduced
Solution Approach 1:
The patent implements a dynamic resource allocation mechanism where the network can flexibly indicate to the UE which frequency resources are available for scheduling versus unavailable for scheduling. This dynamic configuration allows the system to adapt scheduling flexibility to different scenarios while maintaining reference signal processing reliability, as the UE processes reference signals only on the dynamically indicated available frequency resources.
3Productivity
If the UE identifies and processes only the remaining set of frequency resources, then resource allocation efficiency is improved, but the complexity of resource identification and processing increases
Solution Approach 1:
The patent employs preliminary action by having the network pre-configure and indicate to the UE which frequency resources are available for scheduling and which are unavailable before the UE performs reference signal processing. This preliminary indication simplifies the UE's task, as it does not need to independently identify and analyze all frequency resources to determine availability. Instead, the UE receives ready-made information about the first set of frequency resources to process, reducing computational complexity while maintaining high resource allocation efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. According to one or more aspects, a user equipment (UE) may identify, for a set of time periods associated with a reference signal associated with a physical downlink shared channel, an overlap between a first set of frequency resources allocated for the reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and that are unavailable for scheduling on the physical downlink shared channel. The UE may determine a remaining set of frequency resources from the first set of frequency resources based on the overlap, and a subset of frequency resources from the remaining set of frequency resources based on a reference signal processing configuration. The UE may then process the reference signal in the subset of frequency resources based on the reference signal processing configuration.