Uplink Beam Selection via Emission and Panel Reporting
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Solution Overview
Problem
Current uplink beam management in wireless communications, particularly in Next Generation Node B (gNB) systems, faces challenges such as unintended emission towards human bodies due to side lobes and lack of information on user equipment (UE) panel usage, leading to potential safety issues and interference control problems, as well as uplink beam failure due to UE movement or rotation.
Innovation Solution
The solution involves user equipment (UE) reporting emission and panel information to the base station, enabling emission-aware and panel-aware beam selection through Radio Resource Control (RRC) signaling, media access control control elements (MAC-CE), or Downlink Control Information (DCI), allowing the base station to indicate suitable uplink beams and reduce interference by specifying antenna port groups and maximum power reduction levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional uplink beam management is used, then beam transmission can be established, but unintended emission towards human bodies occurs due to side lobes
Solution Approach 1:
The UE reports emission information about candidate uplink beams to the gNB in advance before actual uplink transmission. This preliminary reporting allows the gNB to identify and select beams with lower emission towards human bodies, preventing harmful emissions before they occur while maintaining reliable beam transmission.
Solution Approach 2:
The system implements a feedback mechanism where the UE provides emission information about different uplink beams to the gNB. The gNB uses this feedback to make informed beam selection decisions, choosing beams that minimize emission towards human bodies while ensuring transmission reliability.
2Object-affected harmful factors
If conventional beam selection is used, then uplink transmission can proceed, but interference control problems arise due to lack of information on UE panel usage
Solution Approach 1:
The UE reports panel information indicating which antenna panels are used for receiving downlink beams associated with candidate uplink beams. This preliminary information provision enables the gNB to control interference by understanding the UE's panel configuration and making appropriate beam selection decisions.
Solution Approach 2:
The system establishes a feedback loop where the UE provides panel usage information to the gNB. The gNB uses this feedback to adjust beam selection and power control parameters, thereby controlling interference while maintaining effective uplink transmission.
3Reliability
If beam transmission continues without monitoring, then communication can be maintained, but uplink beam failure occurs due to UE movement or rotation
Solution Approach 1:
The UE reports availability of candidate uplink beams and associated emission and panel information in advance. This allows the gNB to prepare alternative beams and perform beam failure recovery by switching to pre-identified candidate beams when the current beam fails, maintaining reliability while adapting to UE movement.
Solution Approach 2:
The system dynamically adapts beam selection based on UE movement and rotation. The gNB monitors beam failure conditions and switches to alternative candidate beams when needed, making the uplink transmission resilient to changes in UE position and orientation while maintaining communication reliability.
Data Source
AI summary
Disclosed herein are system, method, and computer program product embodiments for performing beam selection. An embodiment operates by receiving, from a base station, a request for a report for at least one uplink beam. In response, the embodiment generates the report for the at least one uplink beam. The report for the at least one uplink beam can include an indication that a resource corresponding to the at least one uplink beam is available for uplink beam indication. The resource can be a Synchronization Signal Block (SSB) resource or a Channel State Information Reference Signal (CSI-RS) resource. The embodiment transmits the report for the at least one uplink beam to the base station. The embodiment then receives, from the base station, an indication that the at least one uplink beam is selectable for uplink transmission based on the report for the uplink beam.