UE Processing Time for Repeated PDCCH and PDSCH Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in effectively determining and managing the processing time for downlink control channels, particularly in 5G networks, which impact the efficiency and reliability of services such as eMBB, mMTC, and URLLC.
Innovation Solution
A method and apparatus are provided to determine the processing time of a UE by considering repetitive transmission of downlink control channels, specifically identifying a larger d1,1 value for PDSCH processing time based on a PDCCH, and transmitting HARQ-ACK messages after the PDSCH processing time, enhancing the UE and base station's processing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the processing time for PDSCH is determined based on the first PDCCH, then the processing time may be insufficient when the first PDCCH is transmitted earlier than the second PDCCH, but if the processing time is determined based on the second PDCCH, then the processing time may be excessive when the first PDCCH is transmitted later than the second PDCCH
Solution Approach 1:
The patent applies dynamics by making the PDSCH processing time determination adaptive based on the actual transmission timing of PDCCHs. Instead of using a fixed rule, the system dynamically selects which PDCCH (first or second) to reference for processing time calculation, depending on their relative transmission times. This ensures the processing time is always appropriate for the actual scenario, resolving the contradiction between reliability and time loss.
Solution Approach 2:
The patent changes the parameter used for processing time determination based on the transmission timing relationship between PDCCHs. When the first PDCCH is transmitted earlier, the processing time is determined based on the second PDCCH; when the first PDCCH is transmitted later, the processing time is determined based on the first PDCCH. This parameter change approach ensures optimal processing time in all scenarios, resolving the contradiction between reliability and time efficiency.
2Reliability
If repetitive transmission of downlink control channels is implemented, then the coverage and reliability are improved, but the complexity of processing time management increases
Solution Approach 1:
The patent applies preliminary action by having the UE store and remember the processing time determination rule established in the first PDCCH before receiving the second PDCCH. This preliminary setup allows the system to handle repetitive transmissions without increasing complexity, as the UE is already prepared with the necessary processing logic. The rule is applied consistently across both PDCCH transmissions, simplifying management while maintaining reliability.
Solution Approach 2:
The patent uses copying by having the UE apply the same processing time determination rule from the first PDCCH to the second PDCCH in repetitive transmissions. Instead of creating new complex management mechanisms for each transmission, the system copies the established rule and applies it consistently. This reduces complexity while maintaining the reliability benefits of repetitive transmissions.
Data Source
AI summary
The disclosure relates to converging a 5G communication system for supporting higher data rates beyond a 4G system with a technology for IoT, and may be applied to intelligent services based on the 5G communication technology and IoT-related technology. A method is provided, which improves coverage of a PDCCH in a wireless communication system and a method of repeatedly transmitting the PDCCH. When a PDCCH is repeatedly transmitted, a method is provided for determining a PDSCH processing time and a PUSCH preparation time considered by a UE is provided, and thus, a more efficient communication system can be implemented.