PDCCH-Based Processing Time Allocation for PDSCH and PUSCH
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Solution Overview
Problem
In 5G communication, the duration for demodulating physical downlink shared channel (PDSCH) and preparing for physical uplink shared channel (PUSCH) transmissions is not adequately defined for high-frequency scenarios with larger subcarrier spacing, leading to challenges in ensuring sufficient processing time for terminals.
Innovation Solution
Determine a time increment for data processing based on physical downlink control channel (PDCCH) monitoring complexity, using a time unit that can encompass multiple slots to provide sufficient duration for demodulation and preparation, considering the terminal's capabilities and PDCCH monitoring complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a single slot time unit is used to define PDCCH monitoring complexity, then the protocol definition is simple, but terminals do not have sufficient time to complete demodulation and preparation in high-frequency scenarios with larger subcarrier spacing
Solution Approach 1:
The patent introduces dynamic adjustment of the time unit for defining PDCCH monitoring complexity based on subcarrier spacing. When subcarrier spacing is large (e.g., 480 kHz), the time unit is extended from one slot to multiple slots (e.g., 4 slots), allowing terminals sufficient time to complete demodulation and preparation. This dynamic adaptation resolves the contradiction between maintaining simple protocol definitions and providing adequate processing time in high-frequency scenarios.
Solution Approach 2:
The patent changes the parameter of time unit duration based on subcarrier spacing conditions. By adjusting the number of slots included in the time unit (from 1 slot to multiple slots) according to the subcarrier spacing value, the system ensures that terminals have adequate processing time while maintaining protocol simplicity through conditional parameter selection.
2Reliability
If the time unit for PDCCH monitoring complexity is extended to multiple slots, then terminals have sufficient processing time, but the definition becomes more complex and deviates from existing protocols
Solution Approach 1:
The patent conditionally changes the time unit parameter based on subcarrier spacing thresholds. For standard subcarrier spacings (15, 30, 60, 120 kHz), it maintains the existing one-slot definition. For larger spacings (240, 480 kHz), it extends to multiple slots. This parameter-based conditional definition ensures processing time sufficiency while minimizing complexity increase by only adjusting parameters when necessary.
Solution Approach 2:
The patent makes the time unit definition dynamic rather than static, allowing it to adapt to different subcarrier spacing scenarios. This dynamic approach ensures reliability by providing sufficient processing time when needed (large subcarrier spacing) while maintaining simplicity in standard scenarios, thus resolving the contradiction between reliability and complexity.
3Ease of operation
If a fixed time increment is allocated for data processing, then the scheduling is simple, but terminals with different PDCCH monitoring complexities cannot receive adequate processing time
Solution Approach 1:
The patent adjusts the time increment parameter based on PDCCH monitoring complexity and subcarrier spacing conditions. By changing the time unit from one slot to multiple slots according to the subcarrier spacing value, the system maintains scheduling simplicity through clear conditional rules while improving adaptability to different terminal capabilities and frequency scenarios.
Solution Approach 2:
The patent introduces dynamic time increment allocation that adapts to terminal capabilities and channel conditions. The time increment is not fixed but adjusts based on subcarrier spacing and PDCCH monitoring complexity, ensuring that terminals with different capabilities receive appropriate processing time while maintaining operational simplicity through standardized adjustment rules.
Data Source
AI summary
A method, terminal and computer readable medium for improving wireless communication system. The wireless communication systems are improved by determining a data processing duration, includes: acquiring a time increment for performing preset data processing and is determined according to monitoring complexity of a physical downlink control channel (PDCCH), where the preset data processing is: demodulation of physical downlink shared channel (PDSCH) transmission or preparation for physical uplink shared channel (PUSCH) transmission, either of which is scheduled by downlink control information (DCI) monitored on the PDCCH.