STR AP Multi-Link Scheduling Under Self-Interference Constraints
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Solution Overview
Problem
Constrained STR AP MLDs face challenges in efficient scheduling and parameter selection due to in-device interference, limiting simultaneous transmit and receive operations, especially in multi-link devices with non-collocated STAs.
Innovation Solution
The AP MLD intelligently selects non-affiliated non-AP STAs and corresponding communication parameters for joint DL/UL scheduling, considering path loss, self-interference, and modulation schemes to optimize simultaneous transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constrained STR AP MLD performs simultaneous transmit and receive operations on multiple links, then spectrum utilization and productivity are improved, but in-device interference increases causing transmission reliability to deteriorate
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting communication parameters (such as modulation schemes, power levels, and resource allocation) based on channel conditions and interference levels. The AP MLD selects appropriate parameter combinations from predefined sets to optimize simultaneous TX/RX operations while maintaining transmission reliability despite in-device interference.
2Productivity
If constrained STR AP MLD schedules concurrent DL and UL transmissions on STR constrained links, then productivity increases, but the complexity of scheduling algorithms and parameter selection increases
Solution Approach 1:
The patent applies segmentation by dividing the scheduling problem into separate downlink and uplink scheduling components that can be independently optimized. The AP MLD maintains separate parameter sets and scheduling decisions for DL and UL transmissions, reducing the overall complexity compared to joint optimization while still achieving efficient concurrent operations.
Solution Approach 2:
The patent applies dynamics by implementing flexible scheduling that adapts to changing channel conditions and traffic demands. The system dynamically selects from multiple parameter sets and adjusts resource allocation based on real-time conditions, allowing the scheduling algorithm to remain manageable while achieving high productivity through adaptive behavior.
3Productivity
If constrained STR AP MLD enables simultaneous TX/RX on multiple links, then productivity improves, but self-interference and harmful factors increase
Solution Approach 1:
The patent applies the blessing in disguise principle by selecting non-affiliated non-AP STAs for simultaneous TX/RX operations. This strategy converts the potential harm of in-device interference into a benefit by ensuring that interfering signals originate from different physical devices rather than the same device, thereby reducing the severity of self-interference while maintaining high multi-link operation efficiency.
Data Source
AI summary
Apparatuses and methods are disclosed for joint downlink/uplink (DL/UL) scheduling and parameter selection for constrained simultaneous transmit and receive (STR) access point (AP) multi-link devices (MLDs). In one embodiment, a STR capable MLD includes an AP STA. The MLD is configured to jointly schedule an uplink communication on a first link and a simultaneous downlink communication on a second link by selecting a first non-access point (non-AP) station (STA) for the uplink communication and a second non-AP STA for the simultaneous downlink communication out of a plurality of non-AP STAs, the first and second links being a STR constrained pair of links, the first link being associated with the first non-AP STA, the second link being associated with the second non-AP STA, and the first and second non-AP STAs not being affiliated with a same MLD.