AP Link Recommendation for QoS in Multi-Link Devices
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Solution Overview
Problem
Current IEEE 802.11 specifications are unclear about how to resolve issues related to link recommendation for meeting quality of service (QoS) requirements, particularly in multi-link devices (MLDs) operating in enhanced multi-link single-radio (EMLSR) and enhanced multi-link multi-radio (EMLMR) modes.
Innovation Solution
The proposed solution involves a mechanism where an access point (AP) associated with an AP multi-link device (MLD) receives QoS requirements from a non-AP MLD and determines if existing target wake time (TWT) or links are sufficient. If not, the AP transmits a message to the non-AP MLD to negotiate additional TWT service periods or transition additional links to an active mode, or enable additional links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the AP uses existing TWT or links to meet QoS requirements, then the system maintains simplicity and avoids additional negotiation overhead, but the QoS requirements may not be met if existing resources are insufficient
Solution Approach 1:
The AP performs preliminary assessment of existing TWT and link resources before QoS negotiation to determine sufficiency in advance, avoiding unnecessary complex negotiations when existing resources are adequate
Solution Approach 2:
The system implements feedback mechanisms where the AP communicates the sufficiency or insufficiency of existing resources to the non-AP MLD, enabling dynamic adjustment of negotiation procedures based on real-time resource assessment
2Reliability
If the AP negotiates additional TWT service periods or transitions additional links to active mode, then the QoS requirements are met, but the negotiation overhead and processing complexity increase
Solution Approach 1:
The system dynamically adjusts the negotiation process based on the assessment results - when existing resources are insufficient, the AP initiates dynamic TWT negotiation or link activation procedures; when resources are sufficient, the system maintains static configurations without additional negotiation overhead
3Reliability
If the AP enables additional links, then the QoS requirements are met through increased capacity, but the system complexity and configuration overhead increase
Solution Approach 1:
The AP performs preliminary assessment of link capacity and QoS requirements before enabling additional links, determining the minimum necessary link activation to meet requirements and avoiding unnecessary system complexity
Solution Approach 2:
The system applies local quality principles by selectively enabling only the specific links and TWT service periods needed to meet QoS requirements, rather than activating all available resources, thereby reducing overall system complexity
Data Source
AI summary
Methods and apparatuses for link recommendation for meeting QoS requirements. A method of wireless communication performed by an AP associated with an AP MLD, the method comprising: receiving an indication of quality of service (QoS) requirements from a non-AP MLD; determining whether an existing target wake time (TWT) or existing links are sufficient to meet QoS requirements; when the existing TWT or existing links are not sufficient to meet the QoS requirements, transmitting a message to the non-AP MLD indicating a need to negotiate additional TWT service periods (SPs) or to transition additional enabled links to an active mode or enable additional links with the AP MLD; and when the existing TWT or existing links are sufficient to meet the QoS requirements, scheduling uplink or downlink resources to meet the QoS requirements.