WLAN Priority Mapping for Low-Latency Frame Exchange
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Solution Overview
Problem
Existing WLAN systems lack a method for dynamically assigning user priorities based on traffic identifiers and low latency identifiers, which hampers efficient transmission and reception of low-latency traffic.
Innovation Solution
A method involving a first station transmitting and receiving requests for traffic identifier-to-user priority mapping with a second station, and performing frame exchanges based on the accepted mapping, allowing flexible assignment of priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed TID-to-UP mapping is used in WLAN systems, then system simplicity is maintained, but flexibility in assigning priorities to low-latency traffic is limited
Solution Approach 1:
The patent implements dynamic TID-to-UP mapping that allows stations to negotiate and update mapping relationships in real-time through frame exchanges. The mapping is no longer fixed but can be adjusted based on traffic requirements, enabling flexible priority assignment for low-latency traffic while maintaining system operability through standardized negotiation procedures.
Solution Approach 2:
The patent changes the mapping parameter from fixed to variable by introducing negotiation mechanisms where stations can propose and accept different TID-to-UP mapping configurations. This allows the mapping parameters to be dynamically adjusted according to traffic characteristics, particularly for low-latency requirements, without changing the fundamental system architecture.
2Adaptability or versatility
If dynamic TID-to-UP mapping negotiation is implemented, then flexibility for low-latency traffic is improved, but communication overhead increases
Solution Approach 1:
The patent applies partial action by implementing dynamic mapping negotiation only when needed, rather than continuously updating all mappings. Stations can maintain existing mappings and only initiate negotiation when traffic patterns change or low-latency requirements arise, reducing unnecessary frame exchanges while preserving dynamic adaptability when required.
3Reliability
If standardized fixed mapping is used, then system compatibility is maintained, but ability to support low-latency traffic requirements is insufficient
Solution Approach 1:
The patent makes the mapping mechanism universal by designing it to handle both fixed and dynamic scenarios within the same framework. The negotiation mechanism can accommodate standard traffic patterns using conventional mappings while also supporting low-latency traffic through dynamic mapping adjustments, making the system multi-functional without requiring separate mechanisms.
Data Source
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AI summary
Disclosed are a method and device for transmission/reception based on dynamic user priority assignment in a wireless LAN system. A method performed by a first station (STA) in a wireless LAN system according to an embodiment disclosed herein may comprise the steps of: transmitting, to a second STA, a request including information related to first traffic identifier (TID)-to-user priority (UP) (TID-to-UP) mapping; receiving, from the second STA, a response including at least one of the acceptance/rejection of the information related to the first TID-to-UP mapping or information related to second TID-to-UP mapping; and performing frame exchange with the second STA on the basis of the information related to the first TID-to-UP mapping or the information related to the second TID-to-UP mapping.