Unified Slave Trigger Frames for Flexible Multi-AP Scheduling
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Solution Overview
Problem
In wireless communications systems with multiple access points, the complexity of signaling design and inflexible scheduling in coordinated transmission scenarios lead to high receiving complexity for slave access points due to varying transmission requirements.
Innovation Solution
A slave trigger frame is introduced that includes trigger type information and AP indication information, allowing flexible scheduling of slave access points in a unified frame format, reducing signaling complexity by enabling unified parsing and interaction between access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different frame formats are used to schedule slave APs for different transmission requirements, then transmission flexibility is improved, but signaling complexity and receiving complexity increase
Solution Approach 1:
The patent applies universality by designing a unified trigger frame format that can schedule multiple slave APs for different transmission requirements (data transmission, channel sounding, beamforming report poll, etc.) within a single frame structure. This eliminates the need for multiple different frame formats while maintaining transmission flexibility, thereby reducing signaling complexity and receiving complexity at slave APs.
2Adaptability or versatility
If multiple different frame formats are used for scheduling, then scheduling flexibility is improved, but receiving complexity of slave APs increases
Solution Approach 1:
The unified trigger frame format enables a single frame structure to convey multiple types of scheduling information for different transmission scenarios. Slave APs only need to parse this one frame format to understand their scheduling requirements, eliminating the complexity of detecting and parsing multiple different frame formats while maintaining full scheduling flexibility.
3Device complexity
If a unified frame format is used for scheduling slave APs, then signaling complexity is reduced, but scheduling flexibility may be compromised
Solution Approach 1:
The unified trigger frame format employs segmentation by dividing the frame into distinct fields (Common Info Field, User Info Fields, etc.) that can independently carry different types of information. This allows the frame to maintain a simple, unified structure while providing flexible scheduling capabilities through the configurable content of its segments, resolving the contradiction between simplicity and flexibility.
Solution Approach 2:
The trigger frame format incorporates dynamic elements where fields such as the User Info Fields can be selectively included or excluded based on the specific scheduling requirements. This dynamic structure allows the unified frame to adapt to different transmission scenarios without requiring multiple static frame formats, maintaining both simplicity and flexibility.
Data Source
AI summary
Flexible scheduling of a slave AP in a unified frame format in a multi-AP coordinated transmission scenario provides an information transmission method. A first access point (AP) generates a slave trigger frame, where the slave trigger frame includes trigger type information and AP indication information. The trigger type information is used to indicate a type of the slave trigger frame. The AP indication information includes an identifier of a second AP. The identifier of the second AP is used to indicate the second AP. The slave trigger frame is used to trigger the second AP to send a physical protocol data unit (PPDU). The PPDU carries a frame corresponding to a type of the slave trigger frame. The first AP sends the slave trigger frame to the second AP.