Beam Pair Selection for 5G Carrier Aggregation
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Solution Overview
Problem
In 5G wireless communication systems, selecting an adequate beam is challenging due to directivity variations with terminal-base station positions and obstacles, leading to potential beamforming gain loss and communication quality degradation, especially when considering channel quality differences between primary and secondary carriers.
Innovation Solution
A method and apparatus for measuring beam pairs using signals from multiple carriers, determining optimal beam pairs based on measurement values for both primary and secondary carriers, and transmitting information to select a common beam that ensures primary carrier performance and prevents secondary carrier performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used to increase transmission distance and data rate, then communication quality improves, but beam selection becomes more complex due to directivity variations and obstacles
Solution Approach 1:
The patent performs beam pair measurement and evaluation before actual data transmission. The base station measures downlink beam pairs and evaluates their quality in advance, then selects the optimal beam pair for transmission. This preliminary action avoids the complexity of real-time beam selection during data transmission.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal reports beam measurement results back to the base station. The base station uses this feedback information to determine the optimal beam pair for transmission, enabling adaptive beam selection based on actual channel conditions.
2Productivity
If carrier aggregation is used to increase data rate, then productivity improves, but beam selection becomes more difficult due to channel quality differences between primary and secondary carriers
Solution Approach 1:
The patent merges the beam selection process for primary and secondary carriers into a unified approach. The base station evaluates beam pairs for both carriers simultaneously and selects a common beam pair that optimizes performance for both, rather than selecting beams independently for each carrier.
Solution Approach 2:
The patent applies different evaluation criteria for primary and secondary carriers based on their specific channel conditions. The base station evaluates beam pairs considering the individual quality characteristics of each carrier, allowing optimized beam selection that accounts for local quality differences between carriers.
3Reliability
If beamforming gain is not provided due to inadequate beam selection, then device complexity is reduced, but communication quality degrades
Solution Approach 1:
The patent implements self-service beam selection where the base station autonomously measures and evaluates beam pairs without requiring complex external assistance. The base station uses its own measurement capabilities to determine optimal beams, reducing the need for additional complex coordination mechanisms.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure relates to an apparatus and a method for wireless communication. The method may include: measuring beam pairs using signals transmitted from another apparatus using a plurality of carriers; determining a beam pair for the plurality of carriers based on measurement values for the beam pairs; and transmitting information indicating a transmit beam of the beam pair, to the other apparatus.