WLAN Antenna Pattern Switching During Single-PPDU Reception
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Solution Overview
Problem
Current antenna pattern switching in WLAN systems relies on RTS/CTS mechanisms, limiting flexibility and applicability, especially in scenarios where these mechanisms are not used, and causing high training overheads.
Innovation Solution
An antenna pattern switching method that allows switching during the reception of a single PPDU without relying on RTS/CTS, enabling the use of multiple patterns for improved signal quality and reduced training overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antenna pattern switching depends on RTS/CTS mechanism, then the switching can be coordinated between sender and receiver, but the flexibility and applicability are limited and training overheads increase
Solution Approach 1:
The patent extracts the antenna pattern switching function from the RTS/CTS mechanism dependency. The receiver performs antenna pattern switching independently based on received signal quality assessment, removing the requirement for RTS/CTS coordination while maintaining effective pattern selection.
Solution Approach 2:
The receiver autonomously performs antenna pattern switching by self-assessing the signal quality of received frames. This self-service approach eliminates the need for external RTS/CTS coordination, reducing training overhead and increasing flexibility in various communication scenarios.
2Reliability
If antenna pattern switching is performed during PPDU reception, then receiving performance is improved through real-time adaptation, but the system complexity increases
Solution Approach 1:
The patent implements dynamic antenna pattern switching during PPDU reception by allowing the receiver to adaptively change patterns based on real-time signal quality assessment. This dynamic approach improves receiving performance while maintaining manageable system complexity through practical implementation constraints.
Data Source
AI summary
An antenna pattern switching method and an apparatus may be applied to the field of wireless local area network (WLAN) technologies, for example, a WLAN communication system supporting 802.11 series protocols. In the method, before a first moment, an access point (AP) receives a physical layer protocol data unit (PPDU) by using a first antenna pattern; and after the first moment, receives the PPDU by using a second antenna pattern. Based on the solution, during receiving of a single PPDU, the AP may sequentially use two antenna patterns to receive a same PPDU, in other words, the AP may perform antenna pattern switching during receiving of the single PPDU.