Multi-Link WLAN Contention Coordination
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Solution Overview
Problem
Traditional techniques for fragmentation and retransmission in wireless communication systems are inadequate for multi-link operation, leading to inefficiencies in throughput and reliability.
Innovation Solution
A method and apparatus for coordinating contention between multiple wireless communication links in a WLAN device, allowing simultaneous transmission and reception across multiple links by synchronizing the operations of different WLAN interfaces via an inter-interface communication link, including sharing information about transmission duration and using counters to manage access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional fragmentation and retransmission techniques are used in multi-link operation, then device complexity is reduced, but throughput and reliability deteriorate
Solution Approach 1:
The patent merges the contention coordination of multiple WLAN interfaces by having the first interface contend for the first link while the second interface contends for the second link, with both interfaces coordinated to win contention simultaneously. This combining of coordination efforts enables synchronized transmissions across multiple links, improving throughput while managing complexity through structured coordination protocols.
Solution Approach 2:
The patent applies preliminary action by having the first WLAN interface determine the transmission duration before the second interface begins its contention process. The second interface is then notified to abort or continue contention based on this predetermined information, allowing synchronized transmissions to be prepared in advance and executed simultaneously, thereby improving reliability and throughput.
2Reliability
If multiple WLAN interfaces contend independently for multiple wireless links, then device complexity is reduced, but transmission synchronization deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the first WLAN interface determines transmission duration and notifies the second interface accordingly. The second interface uses this feedback to decide whether to abort or continue its contention process, ensuring that both interfaces are synchronized and transmissions occur simultaneously. This feedback loop maintains transmission synchronization while managing interface coordination through structured notification and response protocols.
3Productivity
If transmissions occur simultaneously across multiple links, then throughput is improved, but contention coordination complexity increases
Solution Approach 1:
The patent segments the contention coordination process into distinct phases: the first interface determines transmission duration, notifies the second interface, and the second interface decides whether to abort or continue contention based on this information. This segmentation of the coordination process into manageable steps enables simultaneous transmissions across multiple links while controlling complexity through structured, phased coordination rather than monolithic management.
Data Source
AI summary
This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for multi-link operation. In some aspects, a first WLAN device (such as a non-AP STA) may establish with a second WLAN device (such as an AP) a multi-link association by which the first WLAN device can simultaneously transmit information to the second WLAN device via a first wireless communication link and a second wireless communication link. The first WLAN device may coordinate contention for the first wireless communication link by a first WLAN interface of the first WLAN device to be concurrent with contention for the second wireless communication link by a second WLAN interface of the first WLAN device.