Radio Communication System Dynamic Resource Allocation
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Solution Overview
Problem
Industrial automation systems face issues with communication link interruptions leading to repeated service requests and incomplete message transmission, which can prevent systems from entering a safe operating state, resulting in costly production downtime, especially due to high message traffic with numerous but short messages.
Innovation Solution
A radio communication system for industrial automation with a mobile radio base station and subscriber stations that dynamically allocate radio resources based on distance and group membership, using measured signal strength or position data to optimize carrier frequencies, bandwidth, transmission time windows, and transmission power, and allowing for adaptive resource allocation and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio resources are allocated statically without considering device position, then resource allocation is simple, but communication reliability deteriorates due to interference and signal strength variations
Solution Approach 1:
The patent implements dynamic radio resource allocation where the base station continuously determines the position of subscriber stations and adjusts resource allocation (carrier frequencies, bandwidth, transmission power) based on real-time distance and signal strength measurements. This dynamic adaptation resolves the contradiction by maintaining high communication reliability through position-aware resource management while accepting the necessary complexity for tracking and allocation adjustments.
Solution Approach 2:
The system employs feedback mechanisms where subscriber stations transmit position information and signal strength measurements back to the base station, which then adjusts radio resource allocation accordingly. This closed-loop feedback ensures communication reliability is maintained by continuously adapting to changing channel conditions, while the feedback infrastructure manages the complexity of dynamic resource management.
2Reliability
If radio resources are allocated dynamically based on position data, then communication reliability improves, but system complexity increases due to continuous position tracking and resource management
Solution Approach 1:
The patent segments the radio resource allocation process into distinct functional modules: position determination module, distance calculation module, and resource allocation module. Each module handles a specific aspect of the complex task, making the overall system more manageable. The base station determines positions of individual subscriber stations, calculates distances separately, and then allocates resources based on these calculated parameters, thereby reducing system complexity through functional segmentation while maintaining high reliability.
3Reliability
If multiple communication devices share the same radio resources without grouping, then resource utilization is high, but interference increases and communication reliability decreases
Solution Approach 1:
The patent segments the subscriber stations into different communication device groups based on their positions and service requirements. Each group is allocated specific radio resources (carrier frequencies, bandwidth, time windows), creating spatial and spectral separation that reduces interference between groups. This segmentation improves communication reliability by isolating interfering transmissions while maintaining efficient resource utilization through group-based allocation rather than individual device allocation.
Data Source
AI summary
The invention relates to a radio communication system for an industrial automation system, comprising at least one first communication device (201) operated as a radio base station, and several second radio communication devices (202-204) operated as radio subscriber stations. The first communication device is arranged or movable on a vehicle. The first communication device and the second communication devices can be assigned to a group of communication devices and can only be connected to one another in a wireless manner within the same group of communication devices. The first communication device and the second communication devices detect within their assigned communication device group distances between the first communication device and the respective second communication device, on the basis of signal strength measurement values or position data. Depending on the detected distances, the first communication device allocates radio resources for a radio communication with the respective second communication device.