Base Station Dynamic Bandwidth Switching for TD-LTE Coexistence
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Solution Overview
Problem
In the common frequency band used by TD-LTE and other wireless communication systems, wide bandwidths used by TD-LTE can interfere with other systems, necessitating a solution to minimize interference while maintaining high throughput.
Innovation Solution
A base station that dynamically switches between carriers of different frequency widths (1.4 MHz, 3 MHz, and 5 MHz) based on the status of use by other wireless communication systems, using narrower bandwidths when interference is detected and wider bandwidths when the band is unused to optimize coexistence and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If TD-LTE uses wide bandwidth (5 MHz or more) to provide high-speed communication services, then communication speed is improved, but interference to other wireless communication systems in the shared frequency band increases
Solution Approach 1:
The base station dynamically switches between wide bandwidth (5 MHz or more) and narrow bandwidth (1.4 MHz) modes based on real-time detection of other wireless communication systems in the shared frequency band. When other systems are detected, the base station switches to narrow bandwidth to reduce interference; when no other systems are present, it uses wide bandwidth to maximize communication speed.
Solution Approach 2:
The base station changes the bandwidth parameter adaptively between wide (5 MHz or more) and narrow (1.4 MHz) configurations. This parameter change allows the system to optimize communication speed when the frequency band is clear, while minimizing interference to other systems when they are detected in the shared band.
2Object-generated harmful factors
If TD-LTE uses narrow bandwidth (1.4 MHz) to reduce interference to other wireless communication systems, then coexistence with other systems is improved, but communication speed decreases
Solution Approach 1:
The base station dynamically adjusts bandwidth based on environmental conditions. When other wireless communication systems are detected in the shared frequency band, the base station switches to narrow bandwidth (1.4 MHz) to minimize interference. When the band is clear, it transitions to wide bandwidth (5 MHz or more) to maximize communication speed, thus adaptively optimizing both coexistence and performance.
Solution Approach 2:
The system changes the bandwidth parameter between narrow (1.4 MHz) and wide (5 MHz or more) configurations based on detection results. This dynamic parameter adjustment enables the base station to reduce interference to other systems when necessary while maintaining high communication speed when the frequency band is available.
3Object-generated harmful factors
If the base station continuously monitors the frequency band to dynamically switch bandwidth, then interference management is improved, but system complexity increases
Solution Approach 1:
The base station implements a feedback mechanism where it continuously monitors the shared frequency band for other wireless communication systems and adjusts its bandwidth accordingly. The detection unit detects the presence of other systems, and the control unit responds by switching between wide and narrow bandwidth modes, creating a closed-loop control system that automatically manages interference.
Solution Approach 2:
The base station performs self-service by autonomously detecting other wireless communication systems and adjusting its own bandwidth without external intervention. The system independently manages its frequency usage by switching between wide and narrow bandwidth modes based on its own detection results, reducing the need for complex external coordination.
Data Source
AI summary
In a base station, wireless communication method, and wireless communication system, a base station belonging to a first communication system shares the same frequency band with a second wireless communication system. The bandwidth of the first system has at least 5 MHz and 1.4 MHz, a plurality of carriers is available for the 1.4 MHz and a single carrier is available for the 5 MHz in the first system, and a communication scheme of the first system uses a time division duplex long term evolution (TD-LTE). A communication scheme of the second system is different from the TD-LTE, and the base station enables a wireless communication using either 1.4 MHz bandwidth or 5 MHz bandwidth of the first system according to a status of use of the shared frequency band by the second system.