Det-5G Resource Allocation for Closed-Loop Control
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Solution Overview
Problem
Current wireless communication technologies struggle to provide deterministic latency and high reliability for closed-loop control applications, which are critical for industrial use, especially in real-time scenarios like remote control of mobile platforms and field-level communication in industrial automation, due to limitations in radio resource allocation techniques.
Innovation Solution
The implementation of a Deterministic 5G (Det-5G) radio resource allocation framework that enables joint allocation of time and frequency resources for bi-directional communication between a controller and a device, using a flexible time-slotted structure with adjustable sub-carrier spacing and bundle length parameters to ensure cyclic and reliable information exchange, supporting both control-plane and user-plane transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication technologies are used for closed-loop control, then flexibility and mobility are improved, but latency and reliability deteriorate
Solution Approach 1:
The time domain is segmented into discrete timeslots that are further divided into symbols, with each symbol carrying specific control information. This segmentation enables precise timing control and deterministic latency by allocating specific time intervals for downlink control, uplink feedback, and data transmission, ensuring that closed-loop control requirements are met while maintaining wireless flexibility.
Solution Approach 2:
Resource allocation is performed in advance through pre-configured timeslot structures and symbol arrangements. The base station prepares and transmits control information in predetermined timeslots before the actual data transmission occurs, enabling the device to anticipate and prepare for incoming data, thereby reducing latency and improving reliability for closed-loop control applications.
2Productivity
If joint allocation of time and frequency resources is implemented, then resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The timeslot structure serves multiple functions simultaneously: it allocates time for downlink control information, uplink feedback, and data transmission; it defines symbol boundaries for modulation and demodulation; and it provides timing references for synchronization. This multi-functionality improves resource utilization efficiency while avoiding the need for separate complex allocation mechanisms for each function.
Solution Approach 2:
The resource allocation framework is dynamic and flexible, allowing the base station to adjust timeslot durations, symbol counts, and frequency allocations based on actual traffic conditions and control requirements. This dynamic adaptation enables efficient resource utilization for different closed-loop control scenarios without requiring overly complex static allocation configurations.
3Ease of manufacture
If fixed number of symbols per timeslot is used, then processing simplicity is improved, but adaptability to different data rates deteriorates
Solution Approach 1:
While maintaining a fixed number of symbols per timeslot for processing simplicity, the system achieves data rate adaptability by varying the sub-carrier spacing and modulation schemes. The base station can dynamically adjust these parameters within the same timeslot structure to support different data rates, combining processing simplicity with rate adaptability for efficient closed-loop control communication.
Data Source
AI summary
Network resource allocation takes place within a wireless communication channel in which resource is defined with respect to time and frequency; a resource allocation process involves joint allocation of resource for communication to and from a controlled device, to enable a cyclic exchange of information and thus to enable wireless closed loop control of the device.