Rate Matching Parameter Configuration for Wireless Interference
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Solution Overview
Problem
In the downlink non-coherent joint transmission of the new radio (NR) system, terminal devices face challenges in performing effective rate de-matching due to interference from different signals, which affects system performance.
Innovation Solution
The solution involves configuring terminal devices to determine and apply specific rate matching parameter configurations based on received downlink control information (DCI) and associated configuration information, allowing for targeted rate de-matching of data from multiple transmission points, thereby reducing interference and improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a unified rate matching parameter configuration is used for all TRPs, then the terminal device can perform rate de-matching on PDSCHs from multiple TRPs, but system performance deteriorates when TRPs are interfered by different signals
Solution Approach 1:
The patent segments the unified rate matching parameter configuration into multiple TRP-specific rate matching parameter configurations. Each TRP is associated with a specific rate matching parameter configuration, allowing the terminal device to selectively apply the appropriate configuration for each TRP based on interference conditions, thereby resolving the contradiction between adaptability and reliability
Solution Approach 2:
The patent applies local quality by making rate matching parameters TRP-specific rather than uniform across all TRPs. Each TRP can have customized rate matching parameters adapted to its specific interference environment, enabling optimized performance for each local transmission point while maintaining overall system coordination
2Productivity
If TRPs use the same control channel to schedule PDSCH transmission, then scheduling efficiency is improved, but interference management becomes more difficult
Solution Approach 1:
The patent introduces an intermediary mechanism where the control channel carries not only scheduling information but also indicators that identify which TRP-specific rate matching parameter configuration should be applied. This intermediary information enables the terminal to distinguish and manage interference from different TRPs while maintaining efficient unified scheduling
3Object-affected harmful factors
If TRPs use different control channels to schedule PDSCH transmission, then interference management is simplified, but scheduling complexity increases
Solution Approach 1:
The patent merges the functions of multiple control channels by allowing them to use a unified control channel structure while incorporating TRP identification information within the control messages. This combining approach simplifies the control channel architecture while maintaining the ability to manage TRP-specific interference through embedded identifiers
Data Source
AI summary
A wireless communication method, a terminal device and a network device, the method comprising: a terminal device receiving first downlink control information (DCI), the first DCI being used to schedule the transmission of first data; the terminal device receiving the first data; according to the first DCI and first configuration information, the terminal device determining the target rate matching parameter configuration used by the first data, the first configuration information being used to indicate the association between a rate matching parameter configuration and a first control resource set (CORESET), and the first CORESET containing a CORESET that carries the first DCI; and the terminal device performing rate de-matching on the first data according to the target rate matching parameter configuration.