Downlink DMRS Port Detection Across Uneven Interference Blocks
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Solution Overview
Problem
In wireless communication systems, terminal devices face limitations in channel estimation capability due to hardware constraints, leading to suboptimal DMRS port detection and interference suppression, which degrades channel estimation performance and increases unnecessary calculation overheads.
Innovation Solution
A method where a network device indicates resource block groups with varying interference levels to the terminal device, allowing it to dynamically adjust DMRS port detection based on interference, increasing detection in high-interference blocks and reducing it in low-interference blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional downlink signal processing is used, then the basic signal reception function is maintained, but the system cannot adapt to diverse 5G service requirements and has limited coverage enhancement capability
Solution Approach 1:
The downlink signal is segmented into multiple copies that are transmitted through different transmission reception points (TRPs). Each TRP transmits a separate copy of the downlink signal, allowing the system to serve multiple 5G services simultaneously through diversified signal paths while maintaining manageable processing complexity at each individual TRP.
Solution Approach 2:
The same downlink signal template is universally applied across multiple TRPs, with each TRP performing similar signal generation and transmission functions. This multi-functionality approach enables the system to handle diverse 5G services using a standardized signal processing framework, improving adaptability without proportionally increasing complexity.
2Reliability
If single TRP transmission is used, then the transmission structure is simple, but the coverage area and signal reliability are limited
Solution Approach 1:
The transmission function is segmented across multiple independent TRPs, where each TRP transmits a copy of the downlink signal. This segmentation provides spatial diversity and redundancy, significantly improving signal reception reliability and coverage area while keeping each individual TRP's transmission structure relatively simple.
Solution Approach 2:
Multiple downlink signal copies from different TRPs are merged at the user equipment through combined processing. This combining approach enhances signal reliability and extends coverage area by leveraging multiple transmission paths, while the overall system complexity is distributed across multiple TRPs rather than concentrated in a single complex transmitter.
3Adaptability or versatility
If multiple different downlink signals are transmitted for different services, then service diversity is supported, but terminal processing complexity increases
Solution Approach 1:
Instead of transmitting fundamentally different downlink signals for various services, the system transmits multiple copies of the same downlink signal template through different TRPs. The user equipment receives these copies and processes them using unified processing logic, supporting diverse 5G services without increasing terminal processing complexity.
Solution Approach 2:
Conventional approach transmits different signals for different services, increasing terminal complexity. This invention inverts the approach by transmitting the same signal through multiple TRPs and handling service differentiation through resource allocation and signal configuration rather than signal content differentiation, thereby reducing terminal processing complexity.
Data Source
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AI summary
This application provides a downlink signal processing method and apparatus. The method includes: A terminal device receives first indication information from a network device; determines at least one first resource block group and at least one second resource block group based on the first indication information, where the first indication information indicates the at least one first resource block group and/or the at least one second resource block group; and performs DMRS port detection, where a quantity of times of DMRS port detection on each of the at least one first resource block group is greater than or equal to a first preset value, and a quantity of times of DMRS port detection on each of the at least one second resource block group is less than the first preset value. The quantity of times of DMRS port detection on the first resource block group is increased, to fully utilize a capability of the terminal device to suppress interference. The quantity of times of DMRS port detection on the second resource block group is reduced, to reduce unnecessary calculation overheads.