Wireless Beamforming for SINR-Based Reception Direction Setting
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Solution Overview
Problem
Existing wireless communication systems struggle with improper reception direction setting in environments with multiple networks, leading to interference and reduced performance, particularly when the distance between communication devices is long.
Innovation Solution
The system employs a beam forming function that sets reception beam directions based on noise-dependent parameters, limiting the beam scanning range to a predetermined range, and uses frequency offsetting to reduce interference between networks sharing the same frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If reception beam direction is set based on intensity of reception wave, then beam direction selection is simplified, but reception direction is improperly set when interference wave intensity is strong
Solution Approach 1:
The patent changes the parameter used for beam direction selection from reception wave intensity to SINR (signal-to-interference-plus-noise ratio). This parameter change resolves the contradiction by making the selection criterion less susceptible to interference, thereby improving reliability while maintaining operational simplicity through automated SINR-based selection.
Solution Approach 2:
The patent introduces SINR as an intermediary metric that mediates between the reception wave and interference wave. Instead of directly responding to raw intensity (which causes improper selection when interference is strong), the system uses SINR as an intermediate evaluation criterion that balances signal strength against interference levels, leading to more reliable beam direction selection.
2Productivity
If frequency offset is set to improve throughput in short-distance networks, then communication efficiency increases, but normal communication cannot be performed in long-distance networks
Solution Approach 1:
The patent applies dynamics by making the frequency offset configuration adaptable to network conditions. Instead of using a fixed offset value, the system dynamically adjusts the frequency offset based on communication distance and network environment, allowing optimal throughput for short distances while maintaining reliable communication for long distances.
Solution Approach 2:
The patent changes the frequency offset parameter from a static value to a dynamic parameter that varies with communication distance. This parameter change enables the system to optimize throughput for nearby devices while ensuring reliable long-distance communication, resolving the contradiction between productivity and reliability.
3Adaptability or versatility
If beam scanning range is not limited, then all possible directions are searched, but reception direction is set in interference wave direction when intensity is strong
Solution Approach 1:
The patent changes the evaluation parameter from raw intensity to SINR, which fundamentally alters how beam directions are evaluated. This parameter change makes the system less susceptible to selecting interference-dominated directions, thereby improving reception direction accuracy while maintaining comprehensive beam scanning coverage.
Solution Approach 2:
The patent implements feedback through the SINR-based evaluation mechanism, where the system continuously monitors the quality of received signals and uses this feedback to guide beam direction selection. This feedback loop ensures that only directions with adequate signal quality (high SINR) are selected, preventing erroneous selection of interference-dominated directions.
Data Source
AI summary
A wireless device that is one of wireless devices in a first network and sets a reception beam direction with respect to an other wireless device in the first network by using a beam forming function, in which the wireless device is wirelessly connected to the other wireless device in the first network such that a center frequency of the first network is offset to a center frequency of a second network adjacent to the first network, and the reception beam direction in which a state of transmission and reception is improved is set by limiting a beam scanning range of the beam forming function to a predetermined range.