Terminal Device Discarding Inconsistent DMRS Control Information
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Solution Overview
Problem
In the 5G NR wireless communications system, the complex resource scheduling introduces inconsistencies in processing multiple reference signals, leading to errors and reduced demodulation performance when terminal devices receive conflicting information about time-frequency resources for DMRS, causing behavior errors and demodulation issues.
Innovation Solution
The method involves discarding secondary information when it is inconsistent with primary information, ensuring that the terminal device complies with the primary information's indications, thereby using a single DMRS for demodulation across channels and improving demodulation performance by avoiding simultaneous transmission of overlapping DMRSs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device processes multiple pieces of information indicating reference signals in 5G NR, then resource scheduling flexibility is improved, but processing complexity and error risk increase due to information inconsistency
Solution Approach 1:
The terminal device discards the second information (second DCI or second configuration information) when it detects inconsistency with the first information, specifically when bandwidth part indication, antenna port information, or DMRS sequence initialization information differs. This prevents processing errors while maintaining the ability to use consistent information for DMRS transmission.
Solution Approach 2:
Instead of attempting to process and reconcile multiple conflicting pieces of information, the invention inverts the approach by selectively discarding the secondary information source when inconsistency is detected, making the primary information source the authoritative reference for DMRS transmission parameters.
2Productivity
If the terminal device transmits multiple overlapping DMRS based on inconsistent information, then resource utilization is improved, but demodulation performance deteriorates due to behavior errors
Solution Approach 1:
The invention treats the second information as a disposable element that can be discarded when it conflicts with the first information. This prevents the propagation of erroneous parameters that would compromise demodulation performance, while the primary information source remains the reliable foundation for DMRS transmission.
Solution Approach 2:
When inconsistency is detected between the first and second information, the terminal device discards the second information and recovers by using only the first information for DMRS transmission. This ensures that demodulation performance is maintained by avoiding behavior errors from conflicting parameters.
3Reliability
If the terminal device uses a single DMRS for multiple channels, then demodulation performance is improved, but information consistency becomes more critical
Solution Approach 1:
The first information (first DCI or first configuration information) serves as a universal source for DMRS transmission parameters across multiple channels. By discarding the second information when inconsistent, the system ensures that a single consistent set of parameters is used, allowing one DMRS to effectively serve multiple channels without contradiction.
Data Source
AI summary
This application provides an information processing method and a communications apparatus. In embodiments of this application, when a time-frequency resource, for a first DMRS, indicated by first information overlaps a time-frequency resource, for a second DMRS, indicated by second information, but another parameter indicated by the first information is different from that indicated by the second information, a terminal device may discard the second information, to avoid a behavior error or behavior unpredictability of the terminal device. A parameter indicated by each of the first information and the second information includes at least one of the following parameters: bandwidth part indication information, antenna port information, and DMRS sequence initialization information.