Real-Time Application Interface for Low Latency WLAN Traffic
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Solution Overview
Problem
Current IEEE 802.11 wireless communication systems fail to identify and distinguish between Real-Time Application (RTA) packets and non-RTA packets, leading to inadequate low latency control, which is essential for RTA packets requiring timely delivery.
Innovation Solution
An RTA interface is introduced between the Medium Access Control (MAC) and Application (APP) layers to manage RTA sessions, allowing the APP layer to control and monitor MAC layer functions, prioritize RTA traffic, and measure Key Performance Indicators (KPIs) to ensure low latency communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If IEEE 802.11 protocols treat all packets uniformly without distinction, then device complexity is reduced and ease of operation is improved, but latency control for RTA packets deteriorates
Solution Approach 1:
The patent segments packet handling by introducing distinct processing paths for RTA packets and non-RTA packets. The MAC layer identifies RTA packets through specific signaling and routes them through dedicated queueing and transmission mechanisms, while non-RTA packets follow the conventional best-effort path. This segmentation enables differentiated latency control without requiring complete redesign of the protocol stack.
Solution Approach 2:
The patent applies local quality by implementing RTA-specific handling only where necessary in the protocol stack. The APP layer generates RTA packets with special identification, the MAC layer provides dedicated queueing and transmission opportunities, but higher layers continue to use standard protocols. This localized enhancement maintains simplicity in non-critical areas while providing targeted latency control.
2Loss of time
If RTA packets are prioritized with dedicated queueing and transmission opportunities, then latency control is improved, but device complexity and protocol overhead increase
Solution Approach 1:
The patent implements multi-functionality by designing the RTA interface to serve multiple purposes within the existing 802.11 framework. The same MAC layer infrastructure that handles conventional traffic is extended to support RTA packets through additional identification fields and queueing mechanisms. This allows the system to maintain backward compatibility while providing enhanced latency control for time-sensitive applications.
Solution Approach 2:
The patent applies preliminary action by establishing RTA session parameters and queueing configurations in advance through APP layer to MAC layer signaling. Before RTA packet transmission begins, the system pre-configures dedicated queues, transmission opportunities, and identification markers. This preliminary setup reduces the processing burden during actual RTA packet transmission, as the MAC layer simply needs to recognize and forward packets according to pre-established rules.
3Measurement precision
If RTA sessions are established with APP layer control over MAC layer functions, then latency measurement and control capability is improved, but interworking communication complexity increases
Solution Approach 1:
The patent introduces an RTA interface as an intermediary mechanism between the APP layer and MAC layer. This interface provides standardized functions for session establishment, latency measurement, and control parameter exchange. By defining a clear interface specification, the patent enables precise latency control while managing the complexity of cross-layer interactions through well-defined protocols and message formats.
Data Source
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AI summary
A Real-Time Application (RTA) interface between the Medium Access Control (MAC) and Application (APP) layers of interworking communications in the OSI model for use in wireless local area networks (WLANs). The interface between MAC and APP layers can be utilized for RTA packets, while non-RTA packets can still use the regular OSI model. In initializing a new RTA session the APP layer communicates a set of requirements to the MAC layer. The MAC layer monitors the channel and measures key performance indicators (KPIs) and either accepts or rejects the request. The interoperability between the APP and MAC layers provide enhanced abilities to reduce RTA packet latencies, as well as other benefits.