Multi-PDSCH Scheduling Validity Check for High-Frequency Overlap
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Solution Overview
Problem
Current wireless communication systems face challenges in determining valid physical downlink shared channels (PDSCHs) and physical uplink shared channels (PUSCHs) with multiple scheduling, particularly at carrier frequencies above 52.6 GHz, where subcarrier spacing increases and slot duration decreases, leading to overlapping issues with downlink and uplink symbols.
Innovation Solution
The proposed solution involves using a Downlink Control Information (DCI) that schedules multiple PDSCHs or PUSCHs with a time domain resource allocation (TDRA) field, including start and length indicator values (SLIVs), and ensuring a minimum scheduling delay and preparation time to differentiate between valid and invalid channels, while also determining the transmission configuration indicator (TCI) state and quasi co-location (QCL) for multi-PDSCH and multi-PUSCH scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subcarrier spacing is increased for carrier frequencies above 52.6 GHz, then data transmission capacity is improved, but slot duration decreases causing overlapping issues with downlink and uplink symbols
Solution Approach 1:
The patent segments the time domain resources by introducing a validity check mechanism that divides the scheduling process into distinct phases: initial scheduling decision, validity verification against TDD configuration, and conditional execution. This segmentation allows the system to handle multiple PDSCH/PUSCH schedules while ensuring each individual channel meets the timing requirements, thus resolving the overlap issue caused by reduced slot duration at high frequencies
Solution Approach 2:
The patent applies preliminary action by performing validity checks before actual channel allocation. The device预先 determines whether scheduled PDSCH or PUSCH channels are valid by checking against TDD UL-DL configuration prior to resource assignment. This preliminary validation prevents invalid channel allocations that would cause overlapping issues, maintaining reliability while supporting increased subcarrier spacing for higher data capacity
2Productivity
If multiple PDSCH or PUSCH are scheduled simultaneously, then resource utilization is improved, but determining valid channels becomes complex due to overlapping symbols
Solution Approach 1:
The patent applies local quality by making the validation criteria specific to each individual PDSCH or PUSCH channel rather than applying a uniform complex validation to all channels. Each channel is validated against the TDD UL-DL configuration independently, checking local timing relationships (K2 offset, timing advance) specific to that channel's allocation. This localized validation approach simplifies the overall process while enabling multiple simultaneous schedules
Solution Approach 2:
The patent introduces an intermediary validation mechanism that acts as a mediator between the multiple scheduled channels and the TDD configuration. The validity check process serves as an intermediary layer that filters and validates each channel allocation against timing requirements before final resource assignment. This intermediary validation simplifies the complexity by providing a standardized checking process rather than requiring complex inter-channel coordination
3Reliability
If minimum scheduling delay and preparation time are enforced, then channel validity is improved, but scheduling flexibility is reduced
Solution Approach 1:
The patent applies dynamics by making the scheduling parameters (K2 offset, timing advance) adjustable and configurable rather than fixed. The system dynamically determines the appropriate minimum scheduling delay and preparation time based on the specific channel conditions, frequency range, and TDD configuration. This dynamic approach allows the system to maintain reliability through enforced minimum delays while adapting to different scenarios to preserve scheduling flexibility
Solution Approach 2:
The patent utilizes parameter changes by allowing the minimum scheduling delay and preparation time values to be configured based on different operating conditions. The system can adjust these parameters according to the carrier frequency, subcarrier spacing, and specific service requirements. This parameter flexibility enables the system to enforce validity requirements while adapting to various scheduling scenarios, maintaining both reliability and versatility
Data Source
AI summary
Various embodiments herein provide techniques to determine valid and invalid physical downlink shared channels (PDSCHs) and/or physical uplink shared channels (PUSCHs) with multi-PDSCH and/or PUSCH scheduling. Embodiments further relate to determination of transmission configuration indicator (TCI) state and/or quasi co-location (QCL) for multi-PDSCH and/or PUSCH scheduling. Other embodiments may be described and claimed.