Beam Correspondence Failure Detection in Wireless Devices
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Solution Overview
Problem
In wireless communication systems, the separation between transmit (Tx) and receive (Rx) antenna arrays can cause a mismatch between the directions of transmit and receive beams, leading to beam correspondence failures, which affect channel reciprocity and require separate beam training procedures.
Innovation Solution
A method where a first wireless communication device with separate Tx and Rx antenna arrays dynamically monitors the difference between the directions of the transmit and receive beams and compares it to a beam correspondence threshold, allowing it to indicate beam correspondence failures and perform separate beam training procedures as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate Tx and Rx antenna arrays are used, then device functionality is improved, but beam correspondence fails due to direction mismatch
Solution Approach 1:
The patent implements a feedback mechanism where the wireless communication device monitors the difference between transmit beam direction and receive beam direction, compares it to a threshold, and generates a beam correspondence failure indication when the threshold is exceeded. This feedback loop enables the device to detect and report beam correspondence issues dynamically.
Solution Approach 2:
The device performs self-monitoring of beam correspondence by comparing its own transmit and receive beam directions. The device autonomously determines when beam correspondence fails without requiring external assistance, enabling self-service detection and indication of beam correspondence failures.
2Reliability
If separate beam training procedures are performed, then beam correspondence failure is resolved, but communication overhead and power consumption increase
Solution Approach 1:
Instead of always performing full separate beam training procedures, the patent applies partial action by only initiating beam training when beam correspondence failure is detected through monitoring. This selective approach performs the necessary beam training only when needed, avoiding unnecessary power consumption during normal operation.
Solution Approach 2:
The patent implements periodic monitoring of beam correspondence by continuously or periodically comparing transmit and receive beam directions. This periodic check allows the system to detect beam correspondence failures at appropriate intervals and trigger beam training procedures only when necessary, rather than performing continuous training.
3Measurement precision
If beam direction difference is monitored continuously, then beam correspondence failures are detected accurately, but processing complexity increases
Solution Approach 1:
The patent introduces an intermediary threshold value that simplifies the comparison process. Instead of complex continuous analysis, the system compares the beam direction difference against a predefined threshold to determine beam correspondence failure. This intermediary threshold acts as a mediator that simplifies the detection logic while maintaining detection accuracy.
Data Source
AI summary
A first wireless communication device, such as a base station, may include separate transmit and receive antenna arrays. The separation between the transmit and receive antenna arrays may cause a direction of a transmit beam formed at the transmit antenna array to be different from a direction of a receive beam formed at the receive antenna array. The transmit and receive beams may be formed for communication with a second wireless communication device, such as a user equipment (UE). The described aspects enable the first wireless communication device to monitor a difference between a first direction of the transmit beam and a second direction of the receive beam. The first wireless communication device may transmit an indication of a beam correspondence failure to the second wireless communication device when the difference between the first and second directions is greater than or equal to a beam correspondence threshold.