OCF Intermediary for Contention-Free TSCH Scheduling
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Solution Overview
Problem
Current technologies for IoT deployments, specifically those using IEEE 802.15.4e networks, face challenges in efficiently scheduling communications to support dense sensor networks and reduce network traffic and power consumption, particularly in integrating with application layer protocols like OCF for seamless data exchange and security.
Innovation Solution
Implementing an OCF intermediary that acts as a gateway, optimizing TSCH schedules to enable contention-free communication, aggregating data, and modifying network parameters to prioritize power efficiency, while leveraging OCF's observe pattern for subscription-based data reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If IEEE 802.15.4e networks are used for IoT deployments, then device deployment density is improved, but network traffic and power consumption increase
Solution Approach 1:
The system performs preliminary scheduling of time slots and channels for IEEE 802.15.4e networks before actual data transmission occurs. By pre-establishing transmission schedules through the OCF intermediary, devices can communicate efficiently without contention, reducing the need for repeated transmission attempts and thereby lowering power consumption while supporting high device density
Solution Approach 2:
An OCF intermediary is introduced as a mediator between IoT devices and the network. This intermediary manages the scheduling and coordination of communications, aggregating data from multiple devices and handling transmission logistics. This mediation layer reduces direct device-to-device contention and optimizes power usage by coordinating transmissions more efficiently
2Productivity
If contention-free communication is implemented, then network efficiency is improved, but scheduling complexity increases
Solution Approach 1:
The OCF intermediary acts as a centralized scheduler that handles the complexity of creating contention-free schedules. Rather than requiring each device to manage its own scheduling, the intermediary aggregates data from multiple devices and creates coordinated transmission schedules, simplifying the overall system while maintaining high network efficiency
Solution Approach 2:
The scheduling function is segmented and centralized in the OCF intermediary rather than being distributed across all devices. This segmentation allows the complex scheduling logic to be managed by a dedicated component that has overview knowledge of all devices and channels, while individual devices simply follow their assigned schedules
3Loss of substance
If data aggregation is implemented, then network overhead is reduced, but data processing requirements increase
Solution Approach 1:
The OCF intermediary serves as a data aggregation point, collecting data from multiple IoT devices and processing it before transmission to the network. This intermediary approach reduces the total amount of data that needs to be transmitted across the network by consolidating information, thereby reducing network overhead while the intermediary handles the data processing requirements
Data Source
AI summary
System and techniques for radio resource scheduling are described herein. A network request may be received at a first network interface of a gateway device. Here, the network request includes an information request to multiple devices connected to the gateway device via a second network interface. A transmission schedule may be created for the multiple devices that is contention free. The transmission schedule may be propagated to the multiple devices. Information responsive to the information request may be received from the multiple devices according to the transmission schedule. The network request may be fulfilled with the information.