Terminal PDSCH Reception Method for 5G Reliability
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Solution Overview
Problem
Current radio communication systems for next-generation mobile networks, such as 5G, lack a definitive method to relate the physical downlink control channel (PDCCH) reception method to the physical downlink shared channel (PDSCH) reception, leading to potential degradation in communication quality and throughput.
Innovation Solution
A terminal and radio communication method that determines whether to apply a single-DCI based multi-transmission/reception point (TRP) or high speed train (HST)-single frequency network (SFN) scheme to PDSCH reception based on the configured PDCCH reception method, including PDCCH repetition, SFN-PDCCH repetition, and HST-SFN, to ensure appropriate PDSCH reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a PDCCH reception method (PDCCH repetition, SFN-PDCCH repetition, or HST-SFN) is configured for higher reliability and higher-speed movement, then communication reliability is improved, but the relationship with PDSCH reception method is insufficiently defined leading to potential degradation in communication quality
Solution Approach 1:
The patent dynamically adjusts the PDSCH reception method based on the configured PDCCH reception method. When PDCCH repetition or SFN-PDCCH repetition is configured, the terminal applies single-DCI based multi-TRP reception for PDSCH. When HST-SFN is configured, the terminal applies HST-SFN reception for PDSCH. This dynamic adaptation ensures communication quality is maintained while achieving higher reliability through repetition schemes.
Solution Approach 2:
The patent changes the reception parameters based on the PDCCH configuration type. For repetition-based PDCCH methods, it switches to multi-TRP reception parameters; for HST-SFN PDCCH methods, it switches to HST-SFN reception parameters. This parameter change ensures that the PDSCH reception is optimized according to the specific PDCCH reception scenario, preventing communication quality degradation.
2Adaptability or versatility
If different PDCCH reception methods are configured for higher reliability, then system adaptability is improved, but device complexity increases due to multiple reception method determinations
Solution Approach 1:
The patent performs preliminary determination of the PDSCH reception method based on the PDCCH reception method configuration. The terminal section determines whether single-DCI based multi-TRP or HST-SFN reception should be applied before actual PDSCH reception. This preliminary action simplifies the overall process by establishing the reception method in advance, reducing runtime complexity despite supporting multiple adaptability scenarios.
3Ease of operation
If PDSCH reception method is not definitively determined based on PDCCH reception method, then ease of operation is improved, but productivity decreases due to throughput reduction
Solution Approach 1:
The patent implements dynamic selection of PDSCH reception methods based on PDCCH configuration. The terminal section automatically determines whether to apply single-DCI based multi-TRP or HST-SFN reception according to the configured PDCCH method. This dynamic operation maintains ease of use while optimizing throughput by selecting the appropriate reception method for each scenario, preventing productivity loss.
Data Source
AI summary
A terminal according to an aspect of the present disclosure includes: a receiving section that receives downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) in a control resource set associated with a default quasi co-location (QCL) assumption for the PDSCH; and a control section that determines whether to apply, to the PDSCH, a PDSCH reception method being either of single-DCI based multi-transmission/reception point (TRP) or a high speed train (HST)-single frequency network (SFN) scheme, on the basis of whether a physical downlink control channel (PDCCH) reception method being any one of PDCCH repetition, SFN-PDCCH repetition, and an HST-SFN is configured for the control resource set. According to an aspect of the present disclosure, a PDSCH can be appropriately received, depending on a PDCCH reception method configured.