Access Point Control Signaling for Multi-Stream MCS Allocation
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Solution Overview
Problem
Existing methods for controlling signal transmission in radio communication, such as wireless LAN, have not been sufficiently studied to improve efficiency.
Innovation Solution
An access point and terminal system that utilizes control circuitry to include terminal-common and terminal-specific information in a control signal, indicating data transmission using different modulation and coding schemes over different spatial streams, thereby optimizing multi-layer transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple pieces of terminal-specific information are used to indicate multi-layer transmission control, then transmission control capability is improved, but overhead and complexity increase
Solution Approach 1:
The patent combines multiple pieces of terminal-specific information into a single control signal structure. Specifically, it merges spatial stream allocation information, MCS indication, and other transmission parameters into one unified terminal-specific information field, reducing signaling overhead while maintaining full control capability.
Solution Approach 2:
The control signal structure is designed to be universal and multi-functional. A single terminal-specific information field can indicate both spatial stream allocation and MCS information, as well as support both single-layer and multi-layer transmission modes, eliminating the need for separate dedicated signals for each function.
2Productivity
If multi-layer transmission with different MCS is implemented, then throughput is improved, but processing complexity increases
Solution Approach 1:
The patent applies different MCS values to different spatial streams based on their individual channel conditions. Each spatial stream can have its own optimized MCS, allowing the system to adapt to local quality variations in different spatial paths while maintaining overall high throughput.
Solution Approach 2:
The system dynamically adjusts MCS values for each spatial stream based on real-time channel quality feedback. The access point can change the MCS configuration for different spatial streams independently, allowing flexible adaptation to varying channel conditions without requiring complete reconfiguration of the transmission system.
3Productivity
If conventional transmission control methods are used, then system complexity is kept low, but transmission efficiency is insufficient
Solution Approach 1:
The patent extends conventional single-layer transmission control to multi-layer spatial transmission control. By adding the spatial dimension with multiple spatial streams, the system achieves higher transmission efficiency while managing complexity through a unified control signal structure that handles all spatial streams simultaneously rather than sequentially.
Data Source
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AI summary
This access point comprises: a control circuit in which, in a control signal including common information common to a plurality of terminals and terminal-specific information specific to a plurality of terminals, one piece of terminal-specific information includes control information instructing to transmit or receive, using different spatial streams, data equal to or less than a prescribed number to which a different modulation encoding method is applied; and a transmission circuit that transmits the control signal.