Flexible UP-to-AC Mapping for Low-Latency WLAN Traffic
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Solution Overview
Problem
Existing WLAN systems lack flexibility in user priority-to-access category (UP-to-AC) mapping, which hinders efficient handling of low latency (LL) traffic and rapid transmission/reception.
Innovation Solution
A method and device for supporting flexible UP-to-AC mapping in WLAN systems, enabling stations (STAs) and access points (APs) to exchange information for dynamic mapping and frame exchange based on accepted UP-to-AC configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed UP-to-AC mapping is used in WLAN systems, then system stability and standard compliance are maintained, but flexibility in handling low latency traffic is reduced
Solution Approach 1:
The patent implements dynamic UP-to-AC mapping where the mapping relationship can be changed based on traffic requirements. The AP receives capability information from STAs indicating support for flexible mapping, then dynamically configures and notifies STAs of the mapping relationships through management frames, allowing the system to adapt mapping configurations in real-time rather than using fixed mappings.
Solution Approach 2:
The patent changes the mapping parameter from fixed to flexible by introducing a capability indication mechanism. STAs indicate their support for flexible mapping through capability information, and the AP uses this to determine whether to apply flexible or fixed mapping, thereby changing the system parameter based on device capabilities and traffic needs.
2Loss of time
If dynamic UP-to-AC mapping is implemented, then low latency traffic handling is improved, but signaling overhead between STA and AP increases
Solution Approach 1:
The patent performs preliminary action by having STAs indicate their flexible mapping support capability in advance through capability information exchanged during association or reassociation. This preliminary indication allows the AP to prepare and configure appropriate mapping relationships before low latency traffic arrives, reducing actual transmission latency while managing signaling overhead efficiently.
Solution Approach 2:
The patent implements feedback mechanisms where the AP receives capability information from STAs about flexible mapping support, processes this information, and then provides feedback by notifying STAs of the configured mapping relationships through management frames. This feedback loop enables adaptive configuration that balances latency performance with signaling overhead.
3Productivity
If flexible UP-to-AC mapping is supported, then rapid transmission of low latency traffic is enabled, but protocol complexity increases
Solution Approach 1:
The patent achieves universality by designing a flexible mapping mechanism that can accommodate both flexible and fixed mapping scenarios within the same protocol framework. The capability indication field allows the system to universally support multiple mapping modes, enabling rapid low latency traffic transmission when needed while maintaining compatibility with standard fixed mapping operations, thus managing protocol complexity through multi-functionality.
Data Source
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AI summary
Disclosed are a method and a device for transmission or reception based on flexible user priority (UP)-to-access category (AC) mapping in a wireless LAN system. A method performed by a station (STA) in a wireless LAN system according to an embodiment of the present disclosure may comprise the steps of: transmitting, to an access point (AP), a request including information associated with first user priority-to-access category (UP-to-AC) mapping; receiving, from the AP, a response including one or more of information associated with second UP-to-AC mapping and whether the information associated with the first UP-to-AC mapping is accepted; and performing frame exchange with the AP on the basis of the information associated with the first UP-to-AC mapping or the information associated with the second UP-to-AC mapping.