Multi-Stream Rate Adaptation in MIMO Wireless Systems
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Solution Overview
Problem
Existing wireless communication devices capable of multiple input multiple output (MIMO) transmission systems can only perform rate adaptation for single or dual stream configurations, failing to adapt effectively for both configurations simultaneously, leading to suboptimal performance in varying channel conditions.
Innovation Solution
A wireless communication system that maintains data structures for different stream configurations, dynamically determines channel characteristics, and adjusts stream configuration and data rate to optimize communication based on current channel conditions, enabling dynamic rate adaptation for both single and multiple stream transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless device performs rate adaptation for single stream configuration, then single stream transmission rate is optimized, but multiple stream transmission cannot be adapted simultaneously
Solution Approach 1:
The patent segments the rate adaptation function into separate data structures for different stream configurations. A first data structure stores rate information for single stream transmissions, while a second data structure stores rate information for multiple stream transmissions. This segmentation allows independent optimization and adaptation for each stream type without interference, resolving the contradiction between single-stream rate optimization and multi-stream adaptability.
Solution Approach 2:
The patent implements a universal rate adaptation mechanism that can handle both single stream and multiple stream configurations through a common control structure. The system maintains multiple data structures but uses a unified adaptation logic that selects the appropriate data structure based on the current stream configuration, enabling the same device to optimally adapt to both single-stream and multi-stream scenarios.
2Productivity
If the wireless device performs rate adaptation for dual stream configuration, then dual stream transmission rate is optimized, but single stream transmission cannot be adapted simultaneously
Solution Approach 1:
The patent segments the rate adaptation function into separate data structures for different stream configurations. A first data structure stores rate information for single stream transmissions, while a second data structure stores rate information for multiple stream transmissions. This segmentation allows independent optimization and adaptation for each stream type without interference, resolving the contradiction between dual-stream rate optimization and single-stream adaptability.
Solution Approach 2:
The patent implements a universal rate adaptation mechanism that can handle both single stream and multiple stream configurations through a common control structure. The system maintains multiple data structures but uses a unified adaptation logic that selects the appropriate data structure based on the current stream configuration, enabling the same device to optimally adapt to both single-stream and multi-stream scenarios.
3Device complexity
If the wireless device uses fixed stream configuration, then implementation is simpler, but cannot adapt to varying channel conditions across different stream types
Solution Approach 1:
The patent segments the adaptation data into separate data structures for single stream and multiple stream configurations. Each data structure contains channel characteristic information specific to its stream type, allowing the system to maintain relatively simple, dedicated adaptation logic for each configuration while still achieving comprehensive adaptability across varying channel conditions.
Solution Approach 2:
The patent implements dynamic selection between different data structures based on the current stream configuration and channel conditions. The system can switch between the first data structure (for single stream) and the second data structure (for multiple streams) dynamically, allowing adaptation to varying channel conditions while maintaining manageable complexity through context-dependent data structure selection.
Data Source
AI summary
Performing wireless transmission of data over a wireless communication medium. A first data structure may be maintained which includes data rate information for transmission using a first number of streams. A second data structure may be maintained which includes data rate information for transmission using a second number of streams. Channel characteristics of the wireless communication medium may be determined. Channel characteristic information may be maintained based on the determined channel characteristics. Accordingly, a stream configuration and data rate may be determined based on the current channel characteristic information. Wireless transmission may be performed using the determined stream configuration and data rate. Determining channel characteristics, maintaining current channel characteristic information, determining a stream configuration and data rate, and performing wireless transmission may be dynamically performed a plurality of times during wireless data transmission.