Analog Network Coding Router Feedback Mechanism
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Solution Overview
Problem
Existing wireless communication networks face issues with transmission capacity due to sequential signal transmission and lack of effective feedback mechanisms in analog network coding, making it difficult for destination nodes to determine if decoding is possible and successful.
Innovation Solution
A method that includes router nodes sending analog acknowledgment signals with information about the hearing duration of mixed signals, allowing receiving nodes to check decodability before receiving the mixed signal and providing feedback through final acknowledgment signals, enabling optimized analog network coding and reducing error rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If analog network coding is used to allow concurrent transmissions, then transmission capacity is improved, but feedback and acknowledgment mechanisms become unavailable
Solution Approach 1:
The patent introduces analog acknowledgment signals transmitted from the router node to the transmitting nodes after signal mixing. These acknowledgment signals carry information about the hearing duration and enable the transmitting nodes to determine whether successful decoding occurred, thus establishing a feedback mechanism that works with analog network coding while maintaining reliability.
Solution Approach 2:
The patent performs the mixing operation at the router node before the acknowledgment signal is transmitted back to the transmitting nodes. This preliminary action of mixing occurs in advance of the feedback transmission, allowing the system to prepare the mixed signal for delivery while the acknowledgment mechanism is already in place to provide feedback about the mixing process.
2Reliability
If sequential transmission is used to prevent interference, then transmission reliability is maintained, but transmission capacity is reduced
Solution Approach 1:
The patent merges multiple data signals into a single mixed signal at the router node through analog mixing. Instead of transmitting signals sequentially as in conventional systems, the router combines multiple concurrent transmissions into one mixed signal that is then forwarded to destination nodes, thereby increasing transmission capacity while maintaining reliability through proper mixing and acknowledgment mechanisms.
3Productivity
If destination nodes receive interfered signals without feedback, then concurrent transmissions are enabled, but decoding success cannot be determined
Solution Approach 1:
The patent establishes a feedback loop where the router node transmits analog acknowledgment signals to the transmitting nodes after performing the mixing operation. These acknowledgment signals provide information about whether the mixed signal was successfully received and decoded, enabling the system to detect decoding success while maintaining concurrent transmissions.
Solution Approach 2:
The router node acts as an intermediary that performs the mixing operation and then uses analog acknowledgment signals to communicate the outcome to the transmitting nodes. This intermediary role allows the system to enable concurrent transmissions while providing a mechanism to detect whether the mixing and decoding were successful.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method optimizes analog network coding by allowing nodes to determine if interfered signals can be decoded early in the process, reducing errors and improving transmission efficiency by enabling fallback to non-interfered transmission modes and facilitating adjustments for unsuccessful packet recovery.
Implementation Method 1
the router node receive a mixed signal resulting from interference of the first and second data signals
Data Source
AI summary
The invention relates to a method for communication between nodes in a wireless network further comprising a router node (2), comprising :a first (1) and second (3) transmitting nodes sending a first (a(t)) and second (b(t))data signals to be respectively transmitted to a first (4) and second (5) receiving nodes,the router node (2) receiving a mixed signal (MDATA[a,b](t)) resulting from interference of the first (a(t)) and second (b(t)) data signals, and sending respectively to the first (4) and second (5) receiving nodes a first and second router analog acknowledgment signals comprising information representative of the hearing duration during which the mixed signal has been received by the router node,the router node (2) sending the mixed signal(MDATA[a,b](t)) to the first (4) and the second (5) receiving nodes,the first (4) and second (5) receiving nodes decoding the mixed signal, based on the respective router analog acknowledgment signals.The invention also relates to a communication device and a network therefor.