Terminal Device Decoding Overlapping PDSCH via RNTI Priority
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Solution Overview
Problem
Terminal devices face challenges in decoding downlink data channels when symbols of transmission time units corresponding to different radio network temporary identifiers (RNTIs) overlap, leading to poor reception performance.
Innovation Solution
A method where a terminal device receives first and second downlink authorization information, determining which Physical Downlink Shared Channel (PDSCH) to preferentially decode based on the RNTI used for scrambling, ensuring effective decoding even when transmission time units overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device attempts to decode all overlapping downlink data channels corresponding to different RNTIs, then the decoding completeness is improved, but the processing complexity and time consumption increase significantly
Solution Approach 1:
The patent segments the decoding process by dividing overlapping downlink data channels into different priority groups based on their corresponding RNTI types. The terminal device performs segmented decoding: first decoding high-priority channels (system information, paging), then decoding other channels based on remaining resources. This segmentation resolves the contradiction by making the complex decoding process manageable while ensuring critical channels are decoded reliably.
Solution Approach 2:
The patent changes the parameter of decoding priority by introducing RNTI-type-based priority levels. Different RNTI types (SI-RNTI, P-RNTI, RA-RNTI, TC-RNTI) are assigned different priority parameters. The terminal device dynamically adjusts decoding behavior based on these priority parameters, resolving the contradiction between decoding completeness and processing complexity by focusing computational resources on high-priority channels first.
2Productivity
If the terminal device prioritizes decoding certain downlink data channels based on RNTI types, then the processing efficiency is improved, but the risk of missing important information increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing priority rules for different RNTI types before the actual decoding process. The terminal device is configured with knowledge of which RNTI types correspond to high-priority channels (system information, paging). When overlapping channels are detected, the terminal device immediately applies these pre-established rules to determine decoding order, improving efficiency while ensuring critical information is not missed.
Solution Approach 2:
The patent incorporates feedback mechanisms where the terminal device monitors the decoding results and resource availability. If high-priority channels are successfully decoded, the terminal device adjusts subsequent decoding decisions based on this feedback. This feedback loop ensures that processing efficiency is maintained while information completeness is preserved through adaptive decision-making.
3Reliability
If the terminal device decodes downlink data channels in overlapping time units, then the reception performance is improved, but the time consumption and resource usage increase
Solution Approach 1:
The patent applies dynamics by making the decoding process adaptive and flexible rather than static. The terminal device dynamically determines decoding priorities based on the specific RNTI types involved in the overlap and the current system state. This dynamic approach allows the terminal device to optimize time consumption by focusing on high-priority channels while still achieving reliable reception of critical information, resolving the contradiction between reception performance and time consumption.
Data Source
AI summary
The present application discloses a downlink channel receiving method and a terminal device, including: receiving, by a terminal device, first downlink authorization information and second downlink authorization information that are sent by a network device, where the first downlink authorization information is used to indicate that the terminal device receives a first physical downlink shared channel PDSCH in a first time unit, the second downlink authorization information is used to indicate that the terminal device receives a second PDSCH in a second time unit, and at least one symbol of the first time unit and at least one symbol of the second time unit overlap in a time domain; determining, by the terminal device, according to a RNTI used to scramble the first downlink authorization information and the second downlink authorization information, a PDSCH that is preferentially decoded from the first PDSCH and the second PDSCH.