Beam Failure Reporting via Relay UE for Redundant Wireless Paths
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in beam failure detection and recovery due to time and power-consuming beam failure reports, limited reporting capabilities, and potential loss of reports leading to connectivity latency.
Innovation Solution
Implementing a first UE to relay beam condition reports to a network entity via a sidelink using a relay UE, providing a redundant path for beam condition reporting through control signaling configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure reports are transmitted directly from UE to network entity, then reporting capability is maintained, but latency and power consumption increase
Solution Approach 1:
The patent introduces a relay UE as an intermediary node between the source UE and the network entity. The relay UE receives beam condition reports from the source UE via sidelink and forwards them to the network entity via uplink, creating an indirect reporting path that reduces latency and power consumption while maintaining reporting reliability.
Solution Approach 2:
The beam failure reporting process is segmented into two distinct paths: a direct path (UE to network entity) and a relayed path (UE to relay UE to network entity). This segmentation allows the system to choose the optimal path based on conditions, improving overall efficiency by distributing the reporting function across multiple nodes.
2Use of energy by moving object
If beam failure reports are transmitted via relay UE, then latency and power consumption are reduced, but reporting path complexity increases
Solution Approach 1:
The relay UE acts as a mediator that simplifies the reporting process for the source UE. Instead of the source UE directly communicating with the network entity (which consumes more power), the relay UE intermediates the communication, reducing the source UE's power consumption while managing the additional path complexity.
Solution Approach 2:
The relay UE performs multiple functions: it receives sidelink communications from source UEs, processes beam condition reports, and transmits them to the network entity via uplink. This multi-functionality consolidates complexity into a single node rather than requiring complex multi-path routing logic at each UE.
3Device complexity
If direct beam failure reporting is used, then reporting path is simple, but connectivity reliability decreases during beam failure
Solution Approach 1:
The reporting system is divided into direct and relayed paths, allowing the source UE to select the appropriate path based on beam conditions. During beam failure, the relayed path provides an alternative route to the network entity, maintaining connectivity reliability while keeping the direct path simple when conditions are good.
Solution Approach 2:
The system dynamically selects between direct and relayed reporting paths based on beam conditions. When the access link is healthy, the simple direct path is used. When beam failure occurs, the system dynamically switches to the relayed path through the relay UE, maintaining reliability while preserving simplicity under normal conditions.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a network entity via an access link, control signaling indicating a beam condition reporting configuration for reporting an access link beam condition to the network entity via a relay UE. The UE may detect the access link beam condition for the access link in accordance with the beam condition reporting configuration. The UE may transmit via a sidelink to the relay UE, a beam condition report to the relay UE that indicates to relay the beam condition report to the network entity. Additionally, the UE may transmit the beam condition report to the network entity.