PDCCH Association Signaling for Multi-TRP Joint Decoding
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Solution Overview
Problem
In multi-transmission receiving point communication scenarios, terminal devices struggle to determine which physical downlink control channels (PDCCHs) are the same, leading to a low success rate for joint decoding and reception.
Innovation Solution
A network device sends first information to indicate the association relationship of PDCCHs sent by multiple transmission receiving points, allowing the terminal device to receive and jointly decode these channels based on the indicated relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmission receiving points send the same PDCCH to the terminal device, then the probability of successfully receiving the PDCCH is improved, but the terminal device cannot determine which PDCCHs are the same, resulting in low joint decoding success rate
Solution Approach 1:
The patent introduces a first information indicator as an intermediary element that mediates between the multiple PDCCHs sent by different transmission receiving points and the terminal device. This indicator explicitly identifies the association relationship between PDCCHs, enabling the terminal device to correctly identify which PDCCHs are the same and perform joint decoding, thereby resolving the identification difficulty without compromising the reliability improvement gained from multi-point transmission
2Reliability
If the terminal device receives multiple PDCCHs from different transmission receiving points, then the robustness of control information delivery is improved, but the complexity of determining and processing associated PDCCHs increases
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure and indicate the association relationship between PDCCHs through first information before the terminal device needs to perform joint decoding. This advance indication simplifies the terminal device's processing by providing clear identification rules upfront, reducing the computational complexity and processing burden while maintaining the robustness benefits of receiving multiple PDCCHs
Data Source
AI summary
Embodiments of the present disclosure provide a communication method. The method includes: receiving, by a terminal device, first information sent by a network device, where the first information is used to indicate an association relationship of physical downlink control channels PDCCH sent by N transmission receiving points, and N is an integer greater than or equal to 2; receiving, by the terminal device, the PDCCHs according to the first information.