Dynamic Data Transmission Adjustment for Wireless Interference
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Solution Overview
Problem
The deployment of TD-LTE and WiMAX networks in close frequency bands leads to severe interference due to unsynchronized framing structures and the near-far effect, resulting in reduced throughput and increased costs for alignment or hardware filtering solutions.
Innovation Solution
A dynamic data transmission adjustment method that calculates and monitors specific error rates in wireless communication systems, adjusting the transmission scheme when error rates exceed a threshold to restrict usage of interfering regions and reschedule traffic, thereby mitigating interference without significant throughput reduction or hardware costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If frame structures are aligned between WiMAX and LTE to reduce interference, then interference is reduced, but throughput is dramatically limited and user experience is degraded
Solution Approach 1:
The patent applies dynamics by making the transmission scheme adaptive rather than static. The base station dynamically adjusts the transmission scheme based on real-time error rate measurements in specific regions, allowing the system to respond to changing interference conditions without permanently limiting throughput. This resolves the contradiction by enabling interference mitigation only when and where needed, rather than through constant frame alignment that would always reduce throughput.
Solution Approach 2:
The patent applies local quality by focusing error rate measurement and adjustment on specific regions of the frame rather than the entire transmission. By identifying and adjusting only the problematic regions where interference occurs, the system maintains high throughput in non-affected regions while mitigating interference locally, thus resolving the contradiction between interference reduction and throughput maintenance.
2Object-affected harmful factors
If hardware filters are added to user equipment to cope with interference, then interference rejection is improved, but device cost increases significantly
Solution Approach 1:
The patent replaces the mechanical hardware filtering approach with a signal processing software-based solution. Instead of adding physical filters to user equipment, the base station uses error rate measurement and transmission scheme adjustment to mitigate interference. This substitution eliminates the need for expensive hardware filters while achieving the same interference rejection goal, thus resolving the contradiction between interference rejection and device cost.
Solution Approach 2:
The patent applies self-service by enabling the base station to autonomously detect and compensate for interference effects through error rate measurement and adaptive transmission scheme adjustment. This eliminates the need for additional hardware in user equipment, as the interference mitigation is performed centrally at the base station, thereby resolving the contradiction by achieving interference rejection without increasing device complexity or cost.
3Object-affected harmful factors
If frame structures are aligned to ensure coexistence, then coexistence is improved, but all devices and networks must pay the cost, even when interference does not occur
Solution Approach 1:
The patent applies dynamics by implementing adaptive transmission scheme adjustment based on real-time error rate measurement. The system dynamically switches between regular and adjusted transmission schemes depending on whether interference is detected, allowing the network to maintain full capacity during normal operation while ensuring coexistence only when interference actually occurs, thus resolving the contradiction between coexistence and capacity.
Solution Approach 2:
The patent applies parameter changes by modifying transmission parameters (such as resource allocation, modulation, or coding) in response to measured error rates. This allows the system to maintain optimal parameters for high capacity during normal conditions while adjusting parameters only when interference is detected, thereby resolving the contradiction between ensuring coexistence and maintaining network capacity.
Data Source
AI summary
A dynamic data transmission adjustment method in a wireless communication system. The system includes a base station and a user equipment. The base station and the user equipment communicate amongst themselves by using a first transmission technique. The method includes transmitting a plurality of frames between the base station and the user equipment using a regular transmission scheme according to the first transmission technique, and at least one iteration of the following steps: calculating a specific error rate in at least one specific region of the transmitted frames; and adjusting the regular transmission scheme when a value representative of the specific error rate associated to the specific region exceeds a predetermined threshold.