Transceiver Data Rate Transition Signal Retransmission
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Solution Overview
Problem
Transceivers face challenges in maintaining low Bit Error Rate (BER) during data rate changes, as existing methods require significant time for convergence, leading to degraded BER performance during transition phases.
Innovation Solution
A method where the transmitter retransmits signal parts multiple times during a transition phase, allowing the receiver to combine and output them with an auxiliary data rate, thereby reducing the transition time and maintaining BER performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the transceiver adapts DSP blocks during a data rate change, then the data rate switching capability is improved, but the BER performance degrades during the transition phase due to convergence time requirements
Solution Approach 1:
The transmitter and receiver are informed in advance of the upcoming data rate change, allowing them to prepare for the transition phase before it occurs. This preliminary notification enables the system to initiate convergence procedures and manage the transition more effectively, reducing BER degradation.
Solution Approach 2:
The patent introduces an intermediary mechanism where the transmitter retransmits signal parts multiple times during the transition phase, and the receiver combines these retransmissions. This intermediary approach bridges the gap during DSP convergence, maintaining signal integrity and BER performance despite the ongoing adaptation.
2Productivity
If the transceiver updates DSP blocks during signal transmission, then the productivity is improved by enabling seamless data rate changes, but the transition time increases due to convergence requirements
Solution Approach 1:
The patent ensures continuous useful action by having the transmitter retransmit signal parts throughout the transition phase and the receiver continuously combining these retransmissions. This continuous process maintains productivity during the transition, allowing seamless data rate changes without interrupting the overall signal transmission flow.
Solution Approach 2:
The transmitter retransmits signal parts in periodic intervals during the transition phase, with each retransmission providing additional information for the receiver to combine. This periodic retransmission strategy accelerates the convergence process by providing multiple opportunities for the receiver to achieve stable BER performance.
3Reliability
If the transmitter retransmits signal parts multiple times during transition, then the BER performance is improved, but the use of energy increases due to additional transmissions
Solution Approach 1:
The patent changes the parameter of signal part length to optimize the trade-off between BER performance and energy consumption. By carefully selecting the length of each signal part, the system achieves sufficient convergence for stable BER performance while minimizing the number of retransmissions required, thereby reducing overall energy consumption during the transition phase.
Data Source
AI summary
The present invention provides a method for controlling transmission of a signal between a transmitter and a receiver during a phase of change of a signal data rate. The method comprises, when the change is requested, informing the transmitter and receiver of a start of a transition phase. The transmitter retransmits the signal N times, with N≥1, in identical signal parts having a chosen length. The receiver stores the N retransmitted identical signal parts successively received to combine them together to produce a combined signal part, and to temporarily output these combined signal parts with an auxiliary data rate depending on N and on this signal part length. The transmitter and the receiver are informed of the end of the transition phase when the signal data rate change is finished.