TSN Wireless Transmission Scheduling for Changing RF Conditions
Solution Overview
Problem
Existing Time Sensitive Networking (TSN) systems face challenges in wireless environments due to varying Radio Frequency (RF) conditions, leading to issues such as wasted bandwidth from early data transmission and lost data from interference, particularly in mobile devices like mining haul trucks.
Innovation Solution
A process where a wireless network controller negotiates with a TSN controller for an acceptable schedule, allowing the wireless network to adapt transmission schedules by adjusting Modulation Coding Schemes (MCS) and prioritizing clients to meet negotiated schedules, using predictive models like the Lyapunov characteristic exponent to anticipate RF changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission is performed in wireless environments with varying RF conditions, then network connectivity and data exchange are enabled, but bandwidth is wasted due to early transmission and data is lost due to interference
Solution Approach 1:
The patent implements dynamic transmission scheduling that adapts to changing RF conditions. The system continuously monitors channel quality and adjusts transmission parameters including MCS selection, resource allocation, and timing schedules in real-time, transforming the static transmission approach into a dynamic one that responds to environmental changes.
Solution Approach 2:
The system employs feedback mechanisms where transmission outcomes are monitored and used to adjust future transmissions. The controller receives acknowledgments and channel state information, then modifies subsequent transmission schedules and MCS selections based on this feedback, creating a closed-loop control system that optimizes bandwidth utilization.
2Productivity
If data transmission is performed in wireless environments with varying RF conditions, then network connectivity is maintained, but data is lost due to interference
Solution Approach 1:
The system performs preliminary assessment of RF conditions before initiating data transmission. By evaluating channel quality indicators and predicting interference patterns in advance, the system selects appropriate MCS levels and transmission parameters beforehand, preventing data loss before it occurs rather than reacting after interference happens.
Solution Approach 2:
The patent dynamically changes transmission parameters including Modulation Coding Scheme (MCS) selection, resource block allocation, and transmission timing based on RF conditions. When interference is detected or predicted, the system adjusts these parameters to more robust configurations that resist interference, maintaining data integrity despite varying channel conditions.
3Reliability
If fixed transmission schedules are used in TSN systems, then deterministic latency requirements can be met in wired environments, but the system cannot adapt to varying RF conditions in wireless environments
Solution Approach 1:
The patent transforms the static fixed schedule approach into a dynamic scheduling system that maintains deterministic latency guarantees while adapting to RF conditions. The controller adjusts transmission timing, resource allocation, and MCS selection in real-time based on channel quality, ensuring that latency requirements are met regardless of wireless environment variations.
Solution Approach 2:
The system introduces an intelligent controller as an intermediary between the TSN scheduling requirements and the wireless transmission medium. This controller translates deterministic latency requirements into adaptive transmission schedules that account for RF conditions, acting as a mediator that reconciles the conflicting requirements of determinism and adaptability.
Data Source
AI summary
Adapting transmission schedules in a Radio Frequency (RF) environment may be provided. A Central Network Controller (CNC) of a Time Sensitive Network (TSN) may determine that a data path to a client device comprises a wireless link. The CNC of the TSN may generate a proposed transmission schedule for the time sensitive traffic to the client device through the wireless link in response to determining that the data path to the client device comprises the wireless link. The CNC may provide the proposed transmission schedule to a Wireless Network Controller (WLC) of the wireless link. The CNC may receive a confirmation from the WLC that the proposed transmission schedule can be met. The proposed transmission schedule may be configured in response to receiving the confirmation.