Base Station Coordination for Building Automation Radio Links
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Solution Overview
Problem
Existing methods for controlling bidirectional radio links in closed living spaces, such as apartments or buildings, fail to optimally utilize radio resources while avoiding interference, especially when transmitters are dependent on each other due to their proximity, leading to potential dominating transmissions that disrupt communication.
Innovation Solution
A method where a higher-level base station manages a group of transmitters, allocating a joint transmission contingent and coordinating their activities to prevent simultaneous transmissions on the same frequency, allowing for optimized use of radio resources and avoiding interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transmitters are allowed to transmit independently within their individual transmission contingents, then each transmitter can operate autonomously, but overlapping transmissions on the same frequency cannot be completely avoided, leading to potential communication disruptions
Solution Approach 1:
The patent introduces a base station as an intermediary that coordinates transmission contingents among multiple transmitters. The base station receives transmission requests, determines available contingents, and grants transmission permissions to prevent overlapping transmissions on the same frequency, thereby resolving the conflict between autonomous operation and communication reliability
Solution Approach 2:
The system implements a feedback mechanism where transmitters report their transmission status and contingent usage to the base station, which then adjusts contingent allocation dynamically. This feedback loop ensures that transmission contingents are optimized in real-time to prevent overlaps while maintaining operational flexibility
2Reliability
If a strict transmission contingent system is implemented to avoid overlapping transmissions, then communication reliability improves, but the system complexity increases due to the need for centralized coordination
Solution Approach 1:
The patent merges the coordination function of multiple transmitters into a single base station, which centralizes the management of transmission contingents. This consolidation reduces overall system complexity by eliminating the need for complex peer-to-peer coordination protocols among transmitters while maintaining reliable communication through centralized control
3Object-affected harmful factors
If transmission contingents are allocated to prevent overlapping transmissions, then interference is reduced, but the utilization of radio resources may not be optimized under certain conditions
Solution Approach 1:
The patent implements dynamic transmission contingent allocation where the base station adjusts contingent sizes and assignments based on real-time network conditions, traffic patterns, and transmitter priorities. This dynamic approach allows the system to optimize radio resource utilization while maintaining interference prevention, adapting to changing conditions rather than using static allocation
Data Source
Figure 1~2
AI summary
Method for controlling multiple radio links 1 within an automation system in an enclosed living space, such as a building or building complex, wherein a radio link is established between a transmitter pair 2 comprising a room-side transmitter 3 and a device transmitter 4, wherein all radio links 1 are handled in a coordinated manner on the same radio frequency and in a common transmission range, wherein a predetermined individual transmission quota is assigned to a transmitter pair 2, wherein one radio frequency is released by a regulatory authority for the purpose of building automation within the framework of the individual transmission quotas, wherein the room-side transmitters 3 are grouped into a transmitter group 5, which is managed by a common base station 6.wherein all room-side transmitters 3 grouped in transmitter group 5 are allocated a common transmission quota, and wherein the base station 6 coordinates the transmission activities of transmitter group 5 within the framework of this common transmission quota. The base station 6 thus coordinates all radio links operating on the same radio frequency and within the transmission range of the common room, allowing a prioritized transmitter pair to benefit from a larger transmission quota than it would otherwise be entitled to. Coordination is achieved by organizing the temporal sequence of transmission activities, thereby preventing the simultaneous use of the same radio resource. Preferably, the radio links are operated on the frequency 868 MHz, with a limited transmission power of 25 mW and a duty cycle of less than 1%.