Pathloss-Aware Beam Updates for Multi-TRP Failure Recovery
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beam failures and updating beams for multi-transmission reception point operations, particularly in asymmetric uplink and downlink channels, leading to inefficiencies and reduced transmission/reception success.
Innovation Solution
A wireless device is configured to receive messages indicating candidate beams for communication, with beam updates dependent on the computing device, using a value in the transmission configuration indicator state to determine if the candidate beam is applicable for communication, thereby optimizing beam usage based on the specific computing device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a candidate beam is updated for communication with multiple computing devices, then beam coverage is improved, but beam accuracy deteriorates due to different pathloss characteristics of each device
Solution Approach 1:
The patent segments the beam management process by device type. The network device separately determines first pathloss information for downlink-only devices and second pathloss information for uplink-capable devices. This segmentation allows each device group to receive appropriately tailored beam configurations, resolving the contradiction between broad coverage and precise accuracy.
Solution Approach 2:
The patent applies local quality by providing different pathloss offset values to different computing devices based on their communication capabilities. Downlink-only devices receive one pathloss offset while uplink-capable devices receive another, ensuring each device operates with locally optimized beam parameters suited to its specific functional requirements.
2Ease of operation
If pathloss offset is applied for all computing devices, then beam update simplicity is maintained, but transmission efficiency deteriorates due to incorrect pathloss compensation for certain devices
Solution Approach 1:
The patent introduces dynamic pathloss offset configuration where the network device adapts the pathloss offset value based on the computing device's capabilities. The system dynamically selects between different pathloss offset values (first for downlink-only, second for uplink-capable devices), transforming a static uniform approach into a dynamic adaptive one that maintains simplicity while improving efficiency.
Solution Approach 2:
The patent changes the pathloss offset parameter based on device type. By modifying this critical parameter according to whether a computing device supports uplink or only downlink, the system optimizes transmission efficiency without significantly complicating the beam update process, as the parameter change is driven by device capability classification.
3Reliability
If beam update is performed for all computing devices, then communication reliability is improved, but resource waste occurs for devices that do not require beam updates
Solution Approach 1:
The patent applies partial action by performing beam updates only for computing devices that require them. The network device determines which computing devices need beam updates based on their capabilities and current beam status, applying beam updates selectively rather than universally. This avoids wasting resources on devices that don't require updates while maintaining reliability for those that do.
Data Source
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AI summary
A wireless device may be configured to communicate with multiple computing devices, such as transmission/reception points. A message from a first computing device may be configured to cause the wireless device to determine whether to use a beam update, such as after a beam failure detection. The determination may be based on information in the message, such as a transmission configuration indicator state and/or a pathloss offset.