Demonstration of Real-Time Motion Control Method for Access Edge Computing in PONs

Abstract

In the remote motion control of IoT devices, the delay adversely affects control performance. In our access edge concept, in which motion control is performed from a central office, the delay becomes large due to Dynamic Bandwidth Allocation (DBA) when the Passive Optical Network (PON) is adopted as the access system. No existing motion control method considers the delay changes of the DBA algorithm. We rectify this omission by proposing a novel real-time and high-precision motion control method that links the PON device and the controller. The proposed method can improve the control performance while maintaining the bandwidth utilization efficiency without changing the DBA delay specified to meet the requirements. In the proposed method, the delay in the PON system is calculated by using a delay model based on the setting parameter received from the communication device, and is used for delay compensation control. An experiment shows that, unlike the conventional method which becomes unstable and fails to realize control, the proposed method achieves high resolution control within 4 s, which demonstrates the feasibility of motion control for factory automation using edge computing in PON systems.

Novel Micro-Burst Detection Method in Access/Edge Networks Using Periodic IoT Messages

“…We assume some of IoT devices each of which sends a message every T second, while other devices send messages at random. We further define the number of these periodic devices as a variable N, and assume T is a few tens of milliseconds, according to the previous study [1], for realizing the real-time control.…”

“…Recently, researchers have proposed fixed access network architectures for access edge computing, where applications on edge servers control IoT devices (e.g. industrial robots and sensors) in a real-time manner [1] (Fig. 1).…”

Survey Paper Artificial and Computational Intelligence in the Internet of Things and Wireless Sensor Network

“…This layer also deals with the identification and collection of objects specific information by the sensor or by the reader device. Depending on the sensors type, the information can vary such as location [57], temperature [58], orientation [59], motion [60], vibration [61], acceleration [62], humidity [63], etc. The information that has been collected is then passed to the Network layer for its secure transmission line to the information processing system.…”

“…Location [57], temperature [58], orientation [59], motion [60], vibration [61], acceleration [62], humidity [63] Network Layer…”