Resolving PDSCH Transmission Conflicts in Multi-PDSCH SPS Wireless Systems
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Solution Overview
Problem
In wireless communication systems, particularly in multi-PDSCH semi-persistent scheduling (SPS), there is a conflict between physical downlink shared channel (PDSCH) transmissions, leading to overlapping and potential interference, which existing technologies struggle to manage effectively.
Innovation Solution
The implementation of a method where user equipment (UE) detects potential conflicts between PDSCH transmissions associated with multi-PDSCH SPS and other transmissions in a slot, and based on predefined rules, determines which transmission to keep or drop, ensuring seamless operation by prioritizing transmissions with lower SPS configuration indices, start and length indicator values, or dynamically scheduled transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-PDSCH semi-persistent scheduling is implemented to increase transmission efficiency, then productivity is improved, but conflicting transmissions occur leading to interference and reliability degradation
Solution Approach 1:
The UE proactively identifies potential conflicts between multi-PDSCH SPS transmissions and other transmissions before they occur. By detecting overlapping time resources in advance and applying resolution rules (prioritizing lower SPS configuration indices, dynamic scheduling, or longer duration transmissions), the system resolves conflicts preemptively, ensuring reliable transmission without sacrificing the high efficiency benefits of multi-PDSCH SPS
2Productivity
If multiple PDSCH transmissions are scheduled in the same slot to enhance data throughput, then productivity is improved, but transmission conflicts and interference increase
Solution Approach 1:
The system changes the parameter of transmission priority by evaluating multiple factors including SPS configuration indices, dynamic scheduling status, and transmission duration. By dynamically adjusting which transmission is prioritized based on these parameters, the system allows multiple PDSCH transmissions to coexist in the same slot without harmful interference, thereby maintaining high data throughput
3Reliability
If conflict resolution rules are applied to manage overlapping transmissions, then reliability is improved, but device complexity increases
Solution Approach 1:
The conflict resolution mechanism evaluates transmissions based on clearly defined parameters (SPS configuration index, dynamic scheduling status, transmission duration) and applies deterministic rules. This structured approach based on parameter comparison provides a systematic method for resolving conflicts reliably while keeping UE processing complexity manageable through standardized evaluation criteria
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect a physical downlink shared channel (PDSCH) transmission associated with a multi-PDSCH semi-persistent scheduling (SPS) that potentially conflicts with a second transmission in a slot. The UE may determine to keep at least one of the PDSCH transmission associated with the multi-PDSCH SPS or the second transmission in the slot based at least in part on one or more rules. The UE may perform, with a base station in the slot, at least one of the PDSCH transmission associated with the multi-PDSCH SPS or the second transmission that is kept based at least in part on the one or more rules. Numerous other aspects are described.