Beam Indication for Multiple Component Carriers Following MPE Events
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beam switching for multiple component carriers during maximum permissible exposure (MPE) events, which can lead to interruptions in uplink communications.
Innovation Solution
The method involves a user equipment (UE) transmitting a report to a base station indicating candidate beams for affected component carriers following an MPE event, and the base station responding with DCI messages to schedule uplink communications using the indicated candidate beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station sends separate DCI messages for each component carrier to indicate beam switching, then the beam switching reliability is improved, but the signaling overhead increases and beam switching latency increases
Solution Approach 1:
The patent combines multiple DCI messages into a single DCI message that schedules uplink communications across multiple component carriers simultaneously. This single DCI message includes beam indication information that applies to multiple component carriers, reducing the number of separate signaling operations and decreasing beam switching latency while maintaining reliability through unified scheduling control.
Solution Approach 2:
The DCI message is designed to serve multiple functions: it schedules uplink communications on multiple component carriers and simultaneously provides beam switching indications for those carriers. This multi-functional approach eliminates the need for separate DCI messages for each carrier, reducing signaling overhead and latency while ensuring consistent beam management across all affected carriers.
2Measurement precision
If the base station sends separate DCI messages for each component carrier, then the beam indication precision is improved, but the signaling overhead increases
Solution Approach 1:
The patent merges beam indication information for multiple component carriers into a single DCI message structure. The message contains consolidated scheduling and beam indication data that applies to multiple carriers, reducing the total volume of signaling information transmitted while preserving precise beam indication through unified control parameters that maintain carrier-specific accuracy.
3Speed
If the UE prepares beam switching in advance by reporting candidate beams, then the beam switching speed is improved, but the device complexity increases
Solution Approach 1:
The UE performs preliminary beam assessment and reports candidate beams to the base station before actual beam switching is needed. This advance preparation allows the base station to have pre-evaluated beam options ready, enabling faster beam switching when MPE events occur. The UE's complexity is managed by limiting the candidate beam reporting to essential parameters that the base station can use for quick decision-making.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, a report associated with a maximum permissible exposure event that has occurred for one or more component carriers. The report may indicate one or more candidate beams for each of the one or more component carriers. The UE may receive, from the base station, at least one downlink control information message scheduling an uplink communication on the one or more component carriers. The UE may transmit, to the base station, the uplink communication on the one or more component carriers using at least one transmit beam that corresponds to a candidate beam of the one or more candidate beams for a component carrier of the one or more component carriers. Numerous other aspects are described.