PDSCH Rate Matching Using CORESET-CRS Association
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Solution Overview
Problem
In communication systems, terminal devices at cell edges face signal interference from neighboring cells, leading to poor signal sending and receiving capabilities and channel states, and conventional CoMP technologies struggle with determining time-frequency resources for rate matching to resolve this issue.
Innovation Solution
A method and apparatus that utilize predefined or signaled association relationships between downlink parameters and CRS rate matching parameters to guide network devices and terminal devices in performing rate matching on specific time-frequency resources, ensuring interference avoidance and accurate data exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coordinated multipoint transmission/reception is used to resolve signal interference at cell edges, then signal sending and receiving capability is improved, but the complexity of determining time-frequency resources for rate matching increases
Solution Approach 1:
The patent introduces downlink parameters as intermediaries that carry rate matching indication information. These parameters serve as mediators between the CoMP transmission mechanism and the terminal device, enabling the terminal to determine time-frequency resources without complex direct calculations. The downlink parameters translate the complex CoMP coordination information into actionable rate matching instructions that the terminal can process efficiently.
Solution Approach 2:
The patent utilizes changes in downlink parameter values and configurations to convey rate matching information. By modifying existing downlink parameters to include rate matching indication information, the system avoids introducing entirely new complex signaling mechanisms. The terminal device determines time-frequency resources by monitoring changes in these parameters, simplifying the determination process while maintaining CoMP benefits.
2Object-affected harmful factors
If rate matching is performed on time-frequency resources in coordinated multipoint transmission, then interference from neighboring cells is avoided, but the difficulty of determining which resources to apply rate matching increases
Solution Approach 1:
Downlink parameters act as intermediaries that encode rate matching indication information. Instead of requiring the terminal to directly analyze complex CoMP coordination data to determine which time-frequency resources need rate matching, the downlink parameters provide a simplified interface. The terminal monitors these parameters to identify resources requiring rate matching, reducing the detection and measurement difficulty while maintaining interference avoidance.
Solution Approach 2:
The system implements feedback mechanisms where downlink parameters convey rate matching decisions from the network to the terminal. This feedback loop allows the terminal to accurately identify time-frequency resources requiring rate matching based on network-determined information, rather than independently analyzing interference conditions. The feedback simplifies the detection process by providing direct instructions on resource allocation and rate matching requirements.
Data Source
AI summary
Example communication processing methods and apparatus are described. One method includes receiving M groups of first parameters and N groups of second parameters that are sent by a network device, where each first parameter is a a control resource set (CORESET) group, each second parameter is a cell-specific reference signal (CRS) rate matching parameter, M is equal to N, and both M and N are positive integer greater than or equal to 2. There is an association relationship between each group of first parameters and each group of second parameters. Terminal devices may determine a punctured time-frequency resource on a physical downlink shared channel (PDSCH) based on CRS rate matching parameters determined by the terminal devices to obtain downlink data.