Candidate Beam Recovery for Secondary-Cell Uplink Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communications face inefficiencies due to beam failures, leading to communication problems between base stations and wireless devices, which current control mechanisms fail to address effectively.
Innovation Solution
A wireless device performs a beam failure recovery (BFR) procedure by selecting a suitable candidate beam for secondary cells based on a candidate beam reference signal, ensuring efficient uplink channel transmission until a new configuration is received, and using a default set of candidate beams if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a beam failure recovery procedure is performed using existing beam controls, then beam failure can be detected and recovered, but communication problems arise due to inefficient controls and unsuitable beam selection for secondary cells
Solution Approach 1:
The patent applies local quality by selecting beams specifically suited for secondary cell uplink transmissions rather than using generic beam controls. The wireless device determines candidate beams based on downlink reference signals and selects beams that are locally optimized for each secondary cell's channel conditions, ensuring the beam is appropriate for that specific cell's requirements rather than applying a one-size-fits-all approach
Solution Approach 2:
The patent implements preliminary action by pre-determining candidate beams and their associated reference signals before actual uplink transmission occurs. The wireless device measures downlink reference signals (such as CSI-RS or SSB) and pre-identifies suitable candidate beams, storing this information in advance so that when beam failure recovery is needed, the selection process is accelerated and more efficient
2Ease of operation
If the wireless device waits for new uplink channel configuration activation, then optimal beam selection can be achieved, but communication delays occur during the configuration transition period
Solution Approach 1:
The patent applies preliminary action by pre-configuring and storing candidate beam information before actual transmission needs arise. The wireless device measures and records downlink reference signal characteristics in advance, creating a ready-to-use beam candidate list that eliminates the need to wait for network configuration activation when beam failure occurs
Solution Approach 2:
The patent implements self-service by enabling the wireless device to autonomously select appropriate beams for uplink transmissions without requiring continuous network coordination or configuration activation. The device uses locally measured downlink reference signals to independently determine suitable candidate beams, reducing dependency on network-side configuration timing
3Productivity
If a default set of candidate beams is used, then beam selection can proceed without network indications, but the selected beam may not be optimal for the specific secondary cell
Solution Approach 1:
The patent applies local quality by measuring downlink reference signals specific to each secondary cell and using those local measurements to determine candidate beams. Rather than using a generic default beam set, the device adapts the beam selection to the specific channel conditions of each secondary cell, ensuring both speed and suitability
Data Source
AI summary
Wireless communications are described. Failure recovery associated with resource(s) may be used. A wireless device may select, based on a determined failure, a suitable candidate resource for cell(s), such as secondary cell(s). The wireless device may use the suitable candidate resource, such as a candidate beam, for an uplink channel transmission via a secondary cell, for example, until a new uplink channel configuration/activation is received.