Beam Failure Recovery Signaling for Multi-Carrier Cell Identification
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Solution Overview
Problem
The existing beam failure recovery mechanism in multi-carrier systems fails to effectively recover from beam failures due to the network-side device's inability to determine the correct carrier when a beam failure event occurs, leading to ineffective communication recovery.
Innovation Solution
A method where the UE sends a beam failure recovery request message with indication information to the network-side device, allowing the device to identify the specific cell or bandwidth part (BWP) where the failure occurred, enabling targeted response signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing beam failure recovery mechanism is used in multi-carrier systems, then the mechanism can handle single-carrier beam failures, but it cannot determine the correct carrier when beam failure occurs in multi-carrier systems
Solution Approach 1:
The patent segments the beam failure recovery process by introducing cell-specific indication information that identifies which specific cell or carrier experienced beam failure. This segmentation allows the network side device to distinguish between multiple carriers and target the correct one for recovery, resolving the information loss problem in multi-carrier systems.
Solution Approach 2:
The patent introduces an intermediary element - the indication information field within the beam failure recovery request message - that carries cell identification data. This intermediary enables the transmission of carrier identification information from the terminal to the network side device, solving the problem of lost carrier identification in multi-carrier scenarios.
2Device complexity
If beam failure recovery request is sent without indication information, then the message structure remains simple, but the network-side device cannot determine the specific cell where failure occurred
Solution Approach 1:
The patent applies local quality by adding indication information specifically to the beam failure recovery request message only when needed for multi-carrier identification. This targeted addition improves failure location identification accuracy without unnecessarily complicating the overall message structure for all scenarios.
Solution Approach 2:
The patent implements partial action by adding only the necessary indication information field to convey cell identification, rather than redesigning the entire message structure. This minimal modification achieves precise failure location identification while maintaining relatively simple message structure.
Data Source
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AI summary
Embodiments of this disclosure provide a beam failure recovery method in a multi-carrier system and an apparatus, and relate to the field of communications technologies. The method is applied to UE and includes: when determining that a beam failure event occurs on a carrier corresponding to a first cell and a condition for triggering sending of a beam failure recovery request is met, sending a first beam failure recovery request message to a network-side device by using a first resource, where the first beam failure recovery request message includes first indication information, and the first indication information is used to indicate the first cell; and receiving a beam failure recovery request response message from the network-side device.