MIMO Signaling Field Dynamic Bandwidth Configuration
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Solution Overview
Problem
Current MIMO communication systems face challenges in dynamic bandwidth configuration, especially in millimeter wave frequency bands, leading to complexity and inefficiency in managing channel resources, particularly in multi-user and multi-spatial stream scenarios.
Innovation Solution
The proposed method configures dynamic bandwidth in a signaling field using multiple subfields, allowing for flexible switching between primary and secondary channels, and defines separate subfields for data length configuration in single-user and multi-user scenarios, enhancing transmission efficiency and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic bandwidth configuration is implemented in IEEE 802.11ac, then bandwidth adaptability is improved, but system complexity and implementation cost increase significantly
Solution Approach 1:
The bandwidth configuration is segmented into multiple independent subfields within the signaling field. Each subfield represents a specific bandwidth option (e.g., 20MHz, 40MHz, 80MHz, 160MHz), allowing the system to select and configure bandwidth dynamically by activating specific subfields rather than implementing a complex continuous adjustment mechanism.
Solution Approach 2:
The patent changes the bandwidth parameter through predefined discrete values represented by different subfield configurations. By modifying the signaling field content to indicate different bandwidth options, the system achieves dynamic bandwidth adaptation without requiring complex real-time calculation and adjustment mechanisms, thus reducing implementation complexity.
2Adaptability or versatility
If service field and MAC address field are commonly used to achieve dynamic bandwidth, then bandwidth flexibility is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent merges the bandwidth configuration information directly into the existing signaling field structure by defining specific subfields for bandwidth indication. This integration eliminates the need for separate service fields and MAC address field manipulations, reducing signaling overhead while maintaining bandwidth flexibility. The bandwidth information is embedded within the standard signaling framework, avoiding additional overhead.
3Reliability
If primary channel is interfered and dynamic bandwidth mechanism determines configuration failure, then channel reliability is maintained, but transmission efficiency decreases
Solution Approach 1:
The patent performs preliminary bandwidth configuration by pre-defining multiple bandwidth options and their corresponding subfield representations in the signaling field. When channel interference occurs, the system can quickly switch to alternative bandwidth configurations that are already prepared and validated, avoiding configuration failure and maintaining transmission efficiency. The preliminary setup of bandwidth options enables rapid adaptation to channel conditions.
Data Source
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AI summary
Disclosed is a signalling field of a wireless MIMO communication system. The signalling field comprises: a scrambling initialization sub-field for configuring a scrambling state; a single carrier/orthogonal frequency division multiplexing subfield for completing single carrier transmission and orthogonal frequency division multiplexing transmission; a dynamic band-width configuration subfield; and a spatial stream configuration subfield and a length subfield for configuring the length of sent data. Also provided are a frame structure based on the signalling field, and a wireless MIMO communication method using the frame structure. The present invention not only makes the achievement of a dynamic bandwidth simpler, but also effectively improves the spectrum efficiency. By means of the present invention, the multi-user multi-stream configuration and the configuration of a plurality of carrier sending manners are achieved more effectively.