LTE Receiver Interruption for Aircraft Transponder Interference
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Solution Overview
Problem
The reception capacity of LTE telecommunications systems on board aircraft is heavily impacted by the transmission of blinding pulse trains from aircraft transponders, leading to loss of throughput and increased communication latency due to adaptive gain mechanisms and long resensitization times, rendering LTE communications non-operational during frequent transponder transmissions.
Innovation Solution
A processing method that estimates the duration of data transmission by the first wireless telecommunications module and temporarily interrupts the reception and/or transmission of second sets of data by a second module, allowing for resumption once the estimated duration has elapsed, thereby minimizing the impact of the first set of data transmission on the second set.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the LTE receiver continuously monitors the wireless channel for LTE signals, then it can maintain ready state for immediate communication, but the adaptive gain mechanism gets heavily impacted by transponder pulse trains causing long resensitization time and loss of throughput
Solution Approach 1:
The system performs preliminary action by predicting transponder transmission events before they occur. The prediction unit analyzes historical transponder behavior patterns to anticipate when pulse trains will be transmitted, allowing the LTE receiver to proactively suspend reception or adjust gain settings in advance, avoiding the need for long resensitization periods while maintaining throughput
2Measurement precision
If the LTE receiver maintains adaptive gain for optimal signal reception, then it can correctly process weak LTE signals, but transponder pulse trains cause blinding effect and require long resensitization time
Solution Approach 1:
The system applies preliminary anti-action by using the prediction unit to forecast transponder pulse train transmissions. When a transmission event is predicted, the control unit preemptively adjusts the receiver gain or suspends reception before the pulse train arrives, preventing the blinding effect from occurring in the first place. This eliminates the need for time-consuming resensitization while preserving the ability to correctly process weak LTE signals during normal operation
3Reliability
If the system suspends LTE reception during transponder transmission, then interference is reduced, but communication latency increases due to frequent interruptions
Solution Approach 1:
By using the prediction unit to anticipate transponder transmission events before they occur, the system can suspend LTE reception proactively at optimally timed moments. This preliminary action ensures that suspensions occur only when absolutely necessary, minimizing the total suspension time and reducing communication latency while still maintaining reliability by avoiding reception during actual pulse train transmissions
Data Source
Figure 1~2
AI summary
A processing method in a telecommunications system (2) comprising a first wireless telecommunications module (3) adapted to transmit first sets of data according to a first telecommunications protocol on a wireless transmission channel, the method being characterized in that the telecommunications system comprising a second telecommunications module (5) for receiving second sets of data on said channel according to a second telecommunications protocol, and comprising the following steps when a first set of data is to be transmitted: - estimating the time required for the transmission by the first module (3) of said first set of data; - triggering an interruption, of a duration equal to said estimated duration, of the reception by the second module (5) of second sets of data on said channel; - when the estimated duration has elapsed, triggering a resumption of the reception by the second module on said channel.