PUCCH/PUSCH Signaling for Secondary-Cell Beam Failure Recovery
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Solution Overview
Problem
The communication standard lacks a defined beam failure recovery (BFR) procedure for secondary cells (SCells), leading to inefficiencies and potential delays in wireless communication systems.
Innovation Solution
A method for executing a BFR procedure for SCells, where a terminal device generates a request message to a network device using either a scheduling request configuration associated with a logical channel or a configuration not associated with a logical channel, allowing for efficient beam failure information transmission through allocated resources, thereby reducing delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a beam failure recovery procedure is implemented for SCells, then beam failure recovery capability is improved, but system complexity increases
Solution Approach 1:
The patent applies universality by reusing the existing scheduling request mechanism and PUCCH resources for beam failure recovery in SCells. The terminal device uses the same SR configuration and PUCCH resources that were originally designed for other purposes, thereby achieving beam failure recovery functionality without introducing entirely new complex procedures. This multi-functional approach reduces the increase in system complexity while still providing the desired reliability improvement.
2Loss of time
If beam failure information transmission is prioritized, then recovery time is reduced, but resource allocation complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the terminal device with multiple scheduling request configurations and associated PUCCH resources before beam failure occurs. These configurations are prepared in advance and stored in the terminal device, so when beam failure is detected, the terminal can immediately use the pre-configured resources to transmit beam failure information without undergoing complex real-time resource allocation procedures. This significantly reduces recovery time while keeping the complexity of resource allocation manageable.
3Reliability
If multiple PUCCH resources are configured for beam failure recovery, then transmission reliability is improved, but configuration complexity increases
Solution Approach 1:
The patent applies merging by combining the beam failure recovery function with the existing scheduling request function. The terminal device uses the same PUCCH resources and configuration mechanisms that were originally designed for scheduling requests to also handle beam failure information transmission. This merging of functions allows multiple PUCCH resources to be configured for beam failure recovery without creating entirely separate complex configuration systems, thereby improving transmission reliability while controlling configuration complexity.
Data Source
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AI summary
Provided is a wireless communication method, a terminal device and a network device. The method includes: receiving (410), by a terminal device, configuration information, wherein the configuration information is used to configure a physical uplink control channel, PUCCH, resource; in response to a beam failure occurred in a secondary cell, transmitting (430), by the terminal device, a reporting message through the PUCCH resource and/or transmitting a media access control, MAC, control element, CE, through a physical uplink shared channel, PUSCH, resource.