Wireless AP QoS Context Propagation Before STA Roaming
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Solution Overview
Problem
Existing wireless communication systems face challenges in maintaining quality of service (QoS) contexts during wireless station (STA) mobility, leading to increased latency and signaling overhead when STAs roam between service areas, as neighboring access points (APs) re-establish QoS contexts for each communication flow.
Innovation Solution
Implementing techniques for propagating QoS contexts by having a first wireless AP transmit control signaling to a second wireless AP indicating the established QoS contexts for communication flows, allowing the second AP to apply corresponding policies, thereby reducing latency and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second wireless AP re-establishes QoS contexts for each communication flow after STA roaming, then the QoS contexts can be properly configured for the new connection, but this leads to increased latency and signaling overhead
Solution Approach 1:
The first wireless AP transmits the QoS context information to the second wireless AP before the STA completes the roaming process. This preliminary action allows the second AP to have the QoS context information ready in advance, eliminating the need to re-establish it after roaming, thus reducing latency while ensuring proper QoS configuration.
Solution Approach 2:
The first wireless AP acts as an intermediary by forwarding the QoS context information to the second wireless AP. This mediator approach allows the QoS context to be transferred through the existing connection before disconnection, avoiding the time-consuming re-establishment process at the second AP while maintaining configuration reliability.
2Reliability
If the second wireless AP re-establishes QoS contexts for each communication flow after STA roaming, then the QoS policies can be properly applied, but this results in increased signaling overhead
Solution Approach 1:
The QoS context information is transmitted from the first wireless AP to the second wireless AP before roaming completion. This preliminary transmission ensures that all necessary QoS policy information is already available at the second AP, eliminating the need for additional signaling exchanges after roaming to re-establish these contexts.
Solution Approach 2:
The first wireless AP serves as an intermediary that captures and forwards the complete QoS context information to the second AP. This approach consolidates the information transfer into a single signaling event before roaming, preventing multiple subsequent signaling exchanges that would otherwise be needed for QoS re-establishment.
Data Source
AI summary
This disclosure provides methods, components, devices, and systems for quality of service (QoS) context propagation in wireless communication systems. Some aspects more specifically relate to a first wireless access point (AP), transmitting to a second wireless AP, a QoS context for a first communication flow established between the first wireless AP and a wireless station (STA). The first wireless AP may transmit the QoS context to the second wireless AP in response to an intent of the wireless STA to roam from a coverage area associated with the first wireless AP to a coverage area associated with the second wireless AP. According to the received QoS context, the second wireless AP may determine various QoS policies of a second communication flow associated with the wireless STA and the second wireless AP and begin communicating with the wireless STA according to the QoS policies after association with the wireless STA.