Phased Array Beam Selection for 5G Millimeter Wave
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Solution Overview
Problem
In 5G communication systems, the use of millimeter wave bands for high-speed data transmission faces challenges due to large path loss, reducing service area and requiring efficient beamforming techniques to align transmission and receiving beams quickly to meet low latency requirements.
Innovation Solution
A wireless communication device with a phased array using multiple antenna groups to form beams in different directions, measuring signal power, and estimating power for alternative beam patterns to rapidly select an optimal receiving beam pattern aligned with a desired cell, reducing the time required for beam sweeping and minimizing performance loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam sweeping is performed to select optimal transmission and receiving beams in 5G millimeter wave communication, then communication reliability is improved, but time consumption increases due to the need to sweep through multiple beam patterns
Solution Approach 1:
The patent applies preliminary action by measuring and storing channel state information for multiple beam patterns in advance before actual communication occurs. The wireless communication device performs beam sweeping and channel measurement during idle periods or setup phases, so that when data transmission is needed, the pre-measured beam patterns can be quickly selected without performing full beam sweeping again, thus reducing time consumption while maintaining reliable beam selection
Solution Approach 2:
The patent implements dynamics by adaptively adjusting beam selection based on changing channel conditions. The system dynamically switches between pre-measured beam patterns according to real-time channel state feedback, allowing it to optimize beam selection for current conditions without repeating the entire beam sweeping process, thereby balancing reliability and time efficiency
2Measurement precision
If all beam patterns are swept to ensure optimal beam selection, then beam selection accuracy is improved, but productivity decreases due to extended beam sweeping time
Solution Approach 1:
The patent applies partial action by measuring channel state information for a selected subset of beam patterns rather than all possible patterns. The system identifies and measures only the most promising beam patterns based on initial rough measurements or historical data, achieving sufficient beam selection accuracy without the need to exhaustively sweep through every possible beam pattern, thus improving productivity while maintaining adequate measurement precision
Solution Approach 2:
The system performs preliminary rough beam measurements to identify candidate beam patterns before conducting detailed channel state measurements. This two-stage approach allows the system to focus detailed measurement resources on only the most promising beams, achieving high beam selection accuracy for the final choice while reducing overall measurement time and improving productivity
3Loss of time
If beam sweeping is skipped to reduce time consumption, then time loss is reduced, but performance loss increases due to suboptimal beam selection
Solution Approach 1:
The patent resolves this contradiction by performing beam sweeping and channel measurement in advance during setup or idle periods. When actual data transmission occurs, the system can skip the time-consuming beam sweeping process and directly use the pre-measured beam patterns, thereby reducing time loss during critical communication phases while maintaining performance through accurate pre-selected beams
Solution Approach 2:
The system dynamically adapts by using pre-measured beam patterns for rapid connection establishment but retains the capability to perform beam sweeping when channel conditions change significantly or when connection quality degrades, thus balancing time loss reduction with performance maintenance through conditional beam selection
Data Source
AI summary
Provided is a method of operating a wireless communication device including a phased array including a first antenna group and a second antenna group to form a beam for transmitting and receiving signals polarized in different directions, which includes receiving first signals polarized in a first direction; receiving second signals polarized in a second direction; measuring power of the first signals and power of the second signals; analyzing a relationship between a channel corresponding to the first receiving beam and a channel corresponding to the second receiving beam; estimating power of third signals that are expected to be received through the first antenna group and power of fourth signals that are expected to be received through the second antenna group; and selecting a receiving beam pattern for wireless communication.