5G Terminal Link Quality Determination for Beam Failure Recovery
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Solution Overview
Problem
In 5G wireless communication, beamforming technologies face challenges in link reconfiguration when link quality is poor, leading to detection conflicts and potential missed or incorrect responses between search spaces.
Innovation Solution
A wireless communication method where a terminal sends a message indicating good signal quality to a network device, detects responses in a specific search space based on a quasi-co-location hypothesis, and stops detecting in another search space after the message is sent, avoiding detection conflicts and ensuring accurate message reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal continues to detect messages in both search spaces after sending the first message, then the terminal may receive responses from the network device, but detection conflicts occur and messages may be missed or incorrectly received
Solution Approach 1:
The patent extracts the detection process into two separate search spaces: a first search space for detecting the first message (beam failure indication) and a second search space for detecting the second message (response message). By separating the detection processes spatially and functionally, the patent eliminates detection conflicts that would occur if both messages were detected in the same search space, thereby improving message reception reliability while maintaining manageable detection complexity.
Solution Approach 2:
The patent segments the message detection process into distinct phases: (1) detecting beam failure indication in the first search space, (2) sending first message to indicate alternative beam, and (3) detecting response message in the second search space. This segmentation allows each detection process to be optimized independently and avoids interference between different message types, resolving the contradiction between reliable reception and process complexity.
2Device complexity
If the terminal uses the same search space for both beam failure indication and response message detection, then the detection process is simpler, but detection conflicts arise leading to missed or wrong message reception
Solution Approach 1:
The patent introduces an intermediary mechanism - the first message (beam failure recovery indication) that mediates between the beam failure detection in the first search space and the response message detection in the second search space. This intermediary message carries information about the alternative beam, allowing the terminal to switch detection parameters appropriately between search spaces, thereby maintaining detection accuracy without excessive complexity.
3Reliability
If the terminal sends a message indicating good signal quality when link quality is poor, then link reconfiguration can be triggered, but detection conflicts between search spaces may occur
Solution Approach 1:
The patent applies preliminary action by having the terminal prepare and send the first message (beam failure recovery indication) before the actual link reconfiguration is complete. This first message proactively indicates the alternative beam to the network device, allowing the network to prepare the appropriate response message in the second search space. This preliminary action ensures that when the response is received, the terminal is already configured to detect it correctly, preventing information loss despite the poor link conditions.
Data Source
AI summary
Embodiments of the present disclosure provide a wireless communication method and terminal, and provide message processing methods in the process of non-link reconfiguration, which include: the terminal sends a first message to a network device when determining that link quality is poor enough to satisfy a first condition, the first message being used to indicate a first signal whose signal quality is good enough to satisfy a second condition; detects a second message in a first search space of a control resources set according to a first quasi-co-location QCL hypothesis determined based on the first signal, the second message being a response message sent by the network device for the first message; and stops detecting message from a network side in a second search space of the control resource set from a first moment; wherein the first moment is a moment when the first message is sent or thereafter.