Active Beam Management Signaling for 5G UE Capability Compliance
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and 5G technologies, face challenges in managing and configuring active beams effectively across user equipment (UEs) with varying capabilities, leading to potential violations of UE capabilities and suboptimal communication quality when switching beams.
Innovation Solution
The implementation of methods and apparatuses within UEs and base stations to signal and manage active beam capabilities, apply rules to ensure valid operations, and perform beam management procedures to maintain sufficient beam quality, allowing UEs to determine and signal their uplink capabilities and perform beam reselections to prevent capability violations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beamforming is implemented to improve spectral efficiency and communication quality, then communication performance is improved, but device complexity and processing requirements increase
Solution Approach 1:
The patent changes the parameter of beam management by introducing a set of candidate beams that the UE can select from, rather than requiring continuous complex beamforming adjustments. The UE determines a candidate beam based on reference signals and reports beam quality metrics to the network, allowing beam management through discrete parameter selection rather than continuous complex processing.
Solution Approach 2:
The UE autonomously determines candidate beams from a set of reference signals and performs self-evaluation of beam quality. The UE independently manages its own beam selection and reporting without requiring complex network-side beamforming processing, thereby reducing overall system complexity while maintaining communication performance.
2Reliability
If the number of active beams is increased to improve communication reliability, then communication quality is improved, but UE capability violations occur
Solution Approach 1:
The UE measures reference signals for multiple candidate beams and provides feedback to the network about beam quality metrics. The network uses this feedback to determine the appropriate number of active beams to configure for the UE, ensuring that the configuration does not exceed UE capabilities while maintaining sufficient communication reliability through multiple candidate options.
Solution Approach 2:
The system dynamically adjusts the number of active beams based on UE capability reporting and network determination. The UE can indicate its capability regarding the number of active beams it can handle, and the network adapts the beam configuration accordingly, allowing flexible optimization of reliability without violating UE capabilities.
3Adaptability or versatility
If beam switching is performed frequently to adapt to channel changes, then communication adaptability is improved, but beam quality degradation occurs due to capability violations
Solution Approach 1:
The network pre-configures a set of candidate beams for the UE based on reported UE capabilities and network determination. This preliminary configuration ensures that when beam switching is needed, the UE can immediately select from pre-approved candidate beams that are guaranteed not to violate capability constraints, avoiding quality degradation from improper beam selection.
Solution Approach 2:
The candidate beam set serves multiple functions: it provides adaptability for channel changes, ensures capability compliance, and maintains beam quality. The same mechanism of candidate beam configuration and selection handles both adaptability requirements and capability constraints simultaneously, making the system universally applicable to different UE capabilities and channel conditions.
Data Source
AI summary
Some techniques and apparatuses described herein permit a user equipment (UE) to signal a capability corresponding to a number of active beams (e.g., active uplink beams) to a base station so that the UE may be appropriately configured, and so that the UE may communicate with the base station accordingly. Furthermore, some techniques and apparatuses described herein permit a UE and/or a base station to apply one or more rules and/or conditions to assist with ensuring that a UE capability, corresponding to a number of active beams (e.g., active uplink beams), is not violated, or to prevent the UE from communicating on a beam that is invalid due to a violated UE capability. Furthermore, some techniques and apparatuses described herein permit a UE and a base station to perform a beam management procedure upon beam activation to ensure that a beam is of sufficient quality for communications.