Reference Signal Positioning in Rate Matching Resource Conflicts
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Solution Overview
Problem
Current communication protocols face challenges in transmitting reference signals due to conflicts with configured time-frequency resources used for downlink control channels, leading to potential transmission failures, especially when the control resource set has a large quantity of time-frequency resources.
Innovation Solution
A method for determining the position of a reference signal within a time-frequency resource based on received configuration information and indication signals, allowing the terminal device to accurately receive the reference signal by identifying suitable resource blocks within the data channel's time-frequency resource, even when there is an intersection with the control channel's resource blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reference signal transmission avoids all time-frequency resources of the configured control resource set, then the reliability of reference signal transmission is improved, but the productivity of resource utilization deteriorates
Solution Approach 1:
The control resource set time-frequency resources are segmented into two categories: resources that must be avoided and resources that can be used. The patent divides the N resource blocks into N1 resource blocks (in rate matching pattern groups) that can be used for reference signal transmission and other resource blocks that should be avoided, enabling selective resource utilization rather than complete avoidance
Solution Approach 2:
Different quality attributes are assigned to different portions of the control resource set. Specifically, certain resource blocks (N1 blocks in rate matching pattern groups) are marked with a different quality attribute (usable) compared to other resource blocks (avoidable), allowing the reference signal transmission to locally adapt to resource availability while maintaining overall reliability
2Reliability
If the reference signal transmission avoids a large quantity of time-frequency resources of the configured control resource set, then the reliability of reference signal transmission is improved, but the device complexity increases
Solution Approach 1:
The network side performs preliminary action by pre-configuring rate matching pattern groups and pre-identifying which resource blocks (N1 blocks) can be used for reference signal transmission. This preliminary classification of resources eliminates the need for complex real-time analysis at the terminal device, reducing device complexity while ensuring reliable transmission through pre-determined safe resources
Data Source
AI summary
This application provides a reference signal transmission method, a terminal device, and an access network device. By receiving first indication information from the access network device, the terminal device can determine, based on the first indication information, whether N1 resource blocks that are in a rate matching pattern group and that have an intersection with a time-frequency resource for transmitting a downlink data channel can be used to transmit the downlink data channel, and further determine a position of a reference signal of downlink data channel, to implement reference signal transmission.