Transmitter Data Rate Adaptation for Fast Interference Recovery
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Solution Overview
Problem
High bandwidth communication systems face difficulties in rapidly recovering from serious interferences, as existing systems rely on large retransmission buffers that are inefficient and costly, and current transceivers take too long to adapt and recover.
Innovation Solution
A transceiver configuration that includes a receiver, transmitter, and buffer, where the transmitter reduces data rate upon detecting interference, improves signal-to-noise ratio, and quickly resumes transmission at the original rate to assist another transceiver in recovering from interference within less than 1 millisecond, using a fast-adaptive mode-conversion canceller and known data for error correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large retransmission buffers are used to store erred packets for delayed transmission, then system reliability is improved, but device complexity and cost increase
Solution Approach 1:
The transmitter performs preliminary actions by proactively reducing the data rate before the receiver experiences severe interference effects. By detecting interference conditions and preemptively adjusting the transmission rate, the system prevents packet errors from occurring in the first place, eliminating the need for large retransmission buffers to store and retransmit erred packets.
Solution Approach 2:
The system implements feedback mechanisms where the receiver monitors interference conditions and sends indications back to the transmitter. The transmitter then adjusts its data rate based on this feedback, creating a closed-loop control system that dynamically adapts to channel conditions, improving reliability without requiring large buffers.
2Reliability
If data rate is reduced to improve signal-to-noise ratio during interference, then reliability is improved, but productivity decreases
Solution Approach 1:
The data rate is made dynamic rather than fixed. The transmitter continuously adjusts the data rate based on real-time interference conditions detected by the receiver. When interference is present, the rate is reduced to maintain reliability; when the channel is clear, the rate is increased to maximize productivity. This dynamic adaptation resolves the contradiction between reliability and productivity.
Solution Approach 2:
The system changes the transmission parameter (data rate) in response to interference conditions. By adjusting this key parameter dynamically, the system maintains optimal signal-to-noise ratio and reliability during interference while minimizing the impact on overall productivity through rapid adaptation and resumption of higher rates when conditions improve.
3Reliability
If fast recovery from interference is achieved by reducing data rate, then reliability is improved, but loss of time occurs during rate adjustment
Solution Approach 1:
The transmitter performs preliminary rate adjustment as soon as interference is detected, before significant packet errors accumulate. This preliminary action minimizes the time window during which packets must be retransmitted, reducing the overall loss of time while maintaining reliability during the interference event.
Solution Approach 2:
The system rushes through the rate adjustment process by immediately responding to interference indications and quickly transitioning to the appropriate data rate. This rapid response minimizes the duration of the transition period and gets the system back to optimal transmission conditions as quickly as possible, reducing time loss.
Data Source
AI summary
Methods and systems for rapidly recovering from a serious interference. One method includes the following steps: transmitting, by a transmitter to a transceiver over a communication channel, ongoing data at a fixed data rate above 100. Mbps; receiving, by a receiver from the transceiver, an indication indicating that the transceiver is experiencing a serious interference; responsive to the indication, reducing data rate at which the transmitter transmits; storing excess data that cannot be sent during the period of the reduced data rate; and increasing the data rate, at which the transmitter transmits, to a level that enables it to transmit, within less than 1 millisecond from the moment of reducing the data rate, both the stored excess data and the ongoing data at the fixed data rate.