eNB Control Channel Beam Assumption via UE Feedback
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Solution Overview
Problem
Next-generation wireless cellular communication systems, such as 5G, face challenges in managing antenna ports for beamforming due to path loss associated with centimeter-wave and millimeter-wave frequencies, requiring efficient methods to determine and establish transmission hypotheses for control channel transmissions.
Innovation Solution
The system employs Beam Reference Signal (BRS) Receiving Power (BRS-RP) and Channel Quality Indicator (CQI) reports from User Equipment (UE) to determine transmission hypotheses, allowing Evolved Node-B (eNB) to adjust beamforming weights and antenna port usage for optimal control channel transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antenna ports are used for beamforming at cmWave and mmWave frequencies, then path loss is compensated and signal quality is improved, but system complexity and difficulty in determining transmission hypotheses increase
Solution Approach 1:
The patent applies preliminary action by having the UE determine transmission hypotheses before control channel transmission. The UE identifies potential antenna port combinations and reports them to the eNB in advance, allowing the system to prepare beamforming configurations proactively rather than reactively, thus reducing real-time decision complexity
Solution Approach 2:
The patent implements feedback mechanisms where the UE measures reference signals from multiple antenna ports, evaluates signal quality metrics, and reports findings back to the eNB. This feedback loop enables the eNB to select optimal antenna port combinations based on actual channel conditions, improving reliability while managing complexity through informed decision-making
2Measurement precision
If transmission hypotheses are determined for multiple antenna port combinations, then beamforming accuracy is improved, but processing time and computational requirements increase
Solution Approach 1:
The patent applies partial action by having the UE evaluate multiple antenna port combinations but report only the most promising candidates (e.g., top 1-3 hypotheses) to the eNB. This approach maintains beamforming accuracy by considering multiple options while reducing processing time and computational overhead by eliminating the need to fully evaluate and report all possible combinations
Solution Approach 2:
The patent implements local quality by having the UE focus evaluation efforts on specific antenna port combinations that are most likely to be optimal based on preliminary measurements. Instead of uniformly evaluating all possible combinations, the system concentrates computational resources on locally optimal candidates, improving efficiency while maintaining overall accuracy
3Adaptability or versatility
If beamforming weights are adjusted dynamically for different transmission hypotheses, then signal quality adapts to channel conditions, but control channel transmission complexity increases
Solution Approach 1:
The patent applies dynamics by enabling the eNB to select from multiple pre-determined transmission hypotheses based on current channel conditions. The system dynamically adjusts which antenna port combination and corresponding beamforming weights are used for control channel transmission, allowing adaptation to varying conditions while maintaining manageable complexity through pre-computed hypotheses
Solution Approach 2:
The patent implements universality by creating a multi-functional framework where the same set of transmission hypotheses and beamforming weights can serve multiple purposes: they work for both data channel and control channel transmissions, and can be applied across different antenna port configurations. This reduces overall system complexity by reusing configurations rather than creating dedicated settings for each function
Data Source
AI summary
Described is an apparatus of an Evolved Node-B (eNB) comprising a first circuitry, a second circuitry, and a third circuitry. The first circuitry may be operable to generate a reference signal transmission for an eNB Transmitting (Tx) beam corresponding with at least a first eNB antenna port having a first polarization and a second eNB antenna port having a second polarization. The second circuitry may be operable to process one or more reporting transmissions carrying at least one of a first signal reception indication for a first UE antenna port and a second signal reception indication for a second UE antenna port. The third circuitry may be operable to determine a transmission hypothesis based upon the one or more reporting transmissions.