MIMO Calibration Timing in Wireless Communication Apparatus
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Solution Overview
Problem
Existing wireless communication systems using MIMO transmission methods, such as SVD-MIMO, require calibration processes to form transmission channels, but the timing of these processes is not well-defined, leading to potential inefficiencies and reduced communication capacity due to unsynchronized channel formation.
Innovation Solution
A wireless communication method and apparatus that determine whether a second wireless communication apparatus supports MIMO transmission and execute a calibration process based on this determination, ensuring proper timing for channel formation and maintaining optimal spatial streams during data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a calibration process is executed before data communication to form transmission channels, then the communication capacity and reliability are improved, but the time required for channel formation and system readiness increases
Solution Approach 1:
The calibration process is executed in advance during the association phase between wireless communication apparatuses, forming transmission channels before actual data communication begins. This preliminary action ensures that channels are ready when needed, improving reliability without adding delay to the data transmission phase
Solution Approach 2:
The system dynamically determines whether to execute the calibration process based on capability determination results. If the second apparatus is determined to support MIMO transmission, calibration is performed; otherwise, it is skipped. This dynamic approach optimizes the balance between reliability improvement and time consumption
2Productivity
If the calibration process is executed at an improper timing, then the communication efficiency decreases, but the system complexity increases due to timing coordination requirements
Solution Approach 1:
The calibration process is performed as a preliminary action during the association phase, which is a standard phase in wireless communication protocols. By embedding calibration in this existing phase, the system avoids adding complex timing coordination while ensuring proper execution timing
Solution Approach 2:
The system includes a determination unit that assesses the capability of the second wireless communication apparatus and provides feedback to control whether calibration is executed. This feedback mechanism ensures calibration is performed at appropriate timing based on actual system capabilities, maintaining efficiency without excessive complexity
Data Source
AI summary
When performing data communication with a second wireless communication apparatus having a plurality of antennas by using a plurality of transmission channels formed by spatial multiplexing, a first wireless communication apparatus having a plurality of antennas determines whether the second wireless communication apparatus is capable of data communication using the plurality of transmission channels, and, on the basis of the determination result, executes a calibration process of forming the plurality of transmission channels with respect to the second wireless communication apparatus.