Channel Parameter Feedback via Acknowledgment Packets
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Solution Overview
Problem
Existing communication systems face challenges in dynamically adapting transmission channel parameters to fluctuating conditions without increasing signaling effort, especially in mobile communication systems where channel symmetry is not guaranteed, leading to suboptimal data rates and error rates.
Innovation Solution
A method and device that utilize a closed-loop feedback system to efficiently determine and retransmit channel parameters via acknowledgment packets, ensuring timely and optimal configuration of the transmission channel without additional signaling overhead, by leveraging existing acknowledgment traffic to convey channel information from the receiver to the transmitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel parameters are transmitted back to the transmitter using a closed-loop feedback method, then the precision of channel parameter determination is improved, but the signaling effort and transmission resource consumption increase
Solution Approach 1:
The patent combines the transmission of channel parameters with existing acknowledgment packets that are already being sent from receiver to transmitter. Instead of sending separate dedicated feedback packets, the channel parameters are merged into the acknowledgment packet structure, utilizing existing transmission resources to carry additional information without increasing overall signaling overhead.
Solution Approach 2:
The acknowledgment packet is given multiple functions: it continues to serve its original purpose of confirming successful data reception while simultaneously carrying channel parameter feedback information. This multi-functionality allows the same transmission resource to accomplish both acknowledgment and channel state feedback without requiring additional dedicated feedback channels.
2Productivity
If channel parameters are determined dynamically to adapt to channel fluctuations, then the data transmission rate is improved, but the complexity of the transmission system increases
Solution Approach 1:
The system performs preliminary determination of channel parameters at the receiver before transmission to the transmitter. By pre-calculating and preparing the channel parameters at the receiver end using available signal information, the system avoids the need for complex real-time joint processing at both ends, simplifying the overall system architecture while enabling dynamic adaptation.
Solution Approach 2:
The patent implements a feedback mechanism where the receiver determines channel parameters based on received signals and feeds this information back to the transmitter through acknowledgment packets. This feedback loop enables the transmitter to adapt its transmission parameters (modulation, coding, power) to current channel conditions, achieving dynamic optimization without requiring complex centralized control.
3Loss of information
If acknowledgment packets are used to transmit channel parameters, then the signaling effort is reduced, but the amount of information that can be transmitted is limited
Solution Approach 1:
The patent extracts and utilizes the unused or underutilized capacity within existing acknowledgment packet structures. By identifying and leveraging available space in the acknowledgment packet format, the system can embed channel parameter information without requiring complete redesign of the packet structure or significant increases in packet size.
Solution Approach 2:
The system employs parameter changes in the acknowledgment packet format to accommodate channel parameter transmission. This may involve using reserved fields, adjusting packet length dynamically, or modifying existing field interpretations to encode channel state information, thereby increasing information capacity while maintaining compatibility with the acknowledgment protocol framework.
Data Source
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AI summary
The invention relates to a device and a method for determining parameters of a transmission channel (3) in a communication system comprising at least one transmitter (1) and at least one receiver (2), the channel parameters being determined in the receiver (2). The channel parameters are transmitted back to the transmitter (1) via a closed signaling loop encompassing the transmission channel (3), a confirmation mode being provided for operating the communication system. The confirmation mode is implemented in the closed signaling loop by means of confirmation packets (5) that are to be transmitted. The confirmation packets (5) that are to be transmitted back from the transmitter (1) to the receiver (2) also contain the channel parameters or channel quality values of the signaling loop.