Base Station Synchronization Signal Allocation for IoT Power Efficiency
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Solution Overview
Problem
In radio communication systems, IoT devices with small battery capacity face challenges in synchronizing with base station apparatuses, leading to increased power consumption and reduced facility utilization factors, as existing systems struggle to balance synchronization time and power efficiency.
Innovation Solution
A radio communication method that dynamically adjusts synchronization signal allocation time and cycle based on the number of retries and elapsed time for asynchronized terminals, allowing the base station apparatus to increase allocation time or shorten the cycle accordingly, thereby optimizing power consumption and facility utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station apparatus sets a short allocation time for control signal communication to improve facility utilization factor, then the facility utilization factor is improved, but the time required for the terminal to start connection or achieve synchronization is increased
Solution Approach 1:
The base station dynamically adjusts the allocation time for synchronization signals based on the synchronization status of terminals. When asynchronized terminals are detected, the allocation time is extended to allow proper synchronization. When all terminals are synchronized, the allocation time is reduced to improve facility utilization factor. This dynamic adjustment resolves the contradiction between maintaining synchronization and improving productivity.
Solution Approach 2:
The base station monitors the synchronization status of terminals and uses this feedback information to adjust the allocation time for synchronization signals. The system continuously checks whether terminals are synchronized and modifies the communication parameters accordingly, creating a closed-loop control system that balances synchronization requirements with facility utilization.
2Loss of time
If the base station apparatus sets a long allocation time for control signal communication to reduce terminal synchronization time, then the synchronization time is reduced, but the facility utilization factor is reduced
Solution Approach 1:
The system transitions from a static allocation time to a dynamic one that adapts to real-time synchronization needs. When terminals are already synchronized, the allocation time is minimized to maximize facility utilization. When asynchronized terminals are present, the time is extended only as needed, avoiding unnecessary resource occupation and maintaining high productivity.
Solution Approach 2:
The base station changes the time parameter for synchronization signal allocation based on the detected synchronization status. By adjusting this parameter dynamically rather than using a fixed value, the system optimizes both synchronization speed and facility utilization factor under different operating conditions.
3Device complexity
If the base station apparatus uses a fixed allocation time for synchronization signals, then the terminal synchronization is simplified, but power consumption of IoT devices with small battery capacity is increased
Solution Approach 1:
The allocation time for synchronization signals changes dynamically based on whether asynchronized terminals are present. For IoT devices that only need to synchronize once and then communicate infrequently, this means they will experience longer allocation times only during initial or re-synchronization events, but can enter low-power states during the extended periods when the base station occupies the channel for other communications, thereby reducing overall power consumption.
Solution Approach 2:
The base station uses periodic synchronization signals with variable allocation times. During periods when all terminals are synchronized, the synchronization signal allocation is minimized or suspended, allowing the base station to occupy the channel for productive communications. IoT devices wake up periodically to check for synchronization signals and can sleep during occupied periods, reducing their power consumption while maintaining synchronization.
Data Source
AI summary
A radio communication method executed by a control apparatus controlling a base station apparatus performing communication with a terminal in a predetermined region, and includes determining whether there is the terminal that is asynchronized in communication with the base station apparatus transmitting a synchronization signal, and controlling, in a case where it is determined that there is the asynchronized terminal, the base station apparatus to increase an allocation time of the synchronization signal in compliance with a radio scheme used by the asynchronized terminal or to shorten an allocation cycle of the synchronization signal.