Multi-Link WLAN Beacon Handling Without STR Conflicts
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Solution Overview
Problem
Existing wireless LAN systems face challenges in performing transmission and reception operations when simultaneous transmission and reception (STR) is unavailable between multi-link devices (MLDs), necessitating a detailed operation method for multi-link operations.
Innovation Solution
A multi-link device (MLD) with a communication module and processor controls the transmission and reception of frames, establishing one basic link and at least one extended link, with specific frames being transmitted or received only through the basic link, and link information is signaled to optimize resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link operations are performed without STR availability, then wireless LAN system performance is improved, but device complexity increases due to the need for detailed operation methods and link management
Solution Approach 1:
The patent segments the multi-link operation into distinct phases: beacon frame transmission phase and data frame transmission phase. During the beacon frame phase, all links are available for reception. During the data frame phase, only non-STR links are used for reception while STR links are suspended. This segmentation resolves the contradiction by providing a structured, manageable approach to multi-link operations that improves system performance without overwhelming device complexity.
Solution Approach 2:
The patent implements dynamic link management where the availability of links for reception changes based on the transmission phase. Links are dynamically switched between available and unavailable states according to whether the device is transmitting beacon frames or data frames. This dynamic approach enables efficient resource utilization across multiple links while maintaining manageable operational complexity through automated phase-based control.
2Area of stationary object
If beacon frames are transmitted through all links, then communication coverage is improved, but resource efficiency deteriorates due to simultaneous transmission and reception conflicts
Solution Approach 1:
The patent implements periodic action by alternating between beacon frame transmission periods and data frame transmission periods. During beacon frame periods, all links are activated for reception to maximize coverage. During data frame periods, only non-STR links are activated while STR links are suspended to avoid conflicts. This periodic switching resolves the contradiction by providing comprehensive coverage when needed while conserving resources during data transmission.
Solution Approach 2:
The patent applies preliminary action by designating specific links as STR-available and STR-unavailable links in advance. This pre-characterization of links allows the system to automatically select appropriate links for data frame reception without real-time decision complexity, thereby maintaining resource efficiency while ensuring beacon frames reach all necessary devices across all links.
3Productivity
If data frames are transmitted through STR-available links during beacon transmission, then resource utilization is improved, but transmission reliability deteriorates due to simultaneous transmission and reception interference
Solution Approach 1:
The patent segments the transmission function by link type: STR-unavailable links are dedicated to data frame reception during beacon periods, ensuring high reliability on these links. STR-available links are suspended for reception during data frame transmission periods, eliminating interference. This segmentation resolves the contradiction by ensuring that data frames are reliably received on links where simultaneous transmission cannot occur, while STR links are temporarily idle but available for other purposes.
Data Source
AI summary
Disclosed is a method by which a multi-link device (MLD) transmits a frame in a wireless communication system. A non-AP MLD can transmit, to an AP MLD, a probe request frame for association, and receive a beacon frame for the association from the AP MLD. Here, a plurality of links are configured for the AP MLD, and the plurality of links are composed of one basic link and at least one extended link and the beacon frame can be transmitted/received through the basic link.