Wireless Data Transmission via Frequency Sampling and Adaptive Backoff
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Solution Overview
Problem
Wireless networks face challenges in reliable and timely data transmission due to errors caused by noise, interference, and collisions, particularly in high-priority message delivery scenarios where latency increases due to collisions.
Innovation Solution
The method combines the use of multiple frequencies, acknowledgments, Carrier Sense Multiple Access (CSMA) protocol, Time Division Multiple Access (TDMA) protocol, and exponential backoff to ensure reliable and quick data transmission by sampling main and backup frequencies, performing protocol exchanges, and adjusting transmission slots based on acknowledgement receipt and failed attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple nodes transmit simultaneously in wireless networks, then network utilization increases, but collisions occur causing increased latency and transmission failures
Solution Approach 1:
The patent implements carrier sensing before transmission, where nodes detect channel occupancy in advance and defer transmission until the channel is clear. This preliminary detection prevents collisions before they occur, allowing higher network utilization without proportional latency increases.
Solution Approach 2:
The patent employs dynamic backoff mechanisms where transmission delays are adjusted based on current network conditions and collision history. Nodes adapt their waiting times dynamically rather than using fixed intervals, optimizing the balance between network utilization and latency under varying load conditions.
2Reliability
If acknowledgements are used to confirm message delivery, then transmission reliability improves, but transmission delay increases due to additional protocol exchanges
Solution Approach 1:
The patent implements periodic acknowledgment mechanisms where acknowledgements are sent at predetermined intervals or after specific numbers of transmissions rather than after every single message. This periodic approach maintains reliability through feedback while reducing the overall number of acknowledgment exchanges and associated delays.
Solution Approach 2:
The patent uses redundant transmission copies where the same message is transmitted multiple times across different time slots or frequency channels. If one transmission fails, another copy may succeed, providing reliability without requiring complex acknowledgment protocols for every transmission attempt.
3Reliability
If exponential backoff is used to reduce collision chances, then collision probability decreases, but transmission latency increases due to extended wait intervals
Solution Approach 1:
The patent implements dynamic backoff adjustment where wait intervals are adapted based on current network conditions, collision history, and traffic priority. Instead of always using maximum exponential backoff intervals, the system adjusts wait times dynamically to minimize latency while maintaining collision avoidance effectiveness.
Solution Approach 2:
The patent changes backoff parameters such as wait interval duration and retry limits based on message priority, network load, and observed collision rates. High-priority messages may use shorter backoff intervals while low-priority traffic uses longer intervals, optimizing the trade-off between collision avoidance and latency for different traffic types.
4Reliability
If multiple frequencies are used for transmission, then interference avoidance improves, but system complexity increases due to frequency management
Solution Approach 1:
The patent divides the wireless spectrum into multiple frequency channels or bands, allowing simultaneous transmissions on different frequencies. This segmentation enables parallel communication paths that avoid interference while maintaining relatively simple frequency management through structured channel allocation and switching protocols.
Data Source
AI summary
A method for transmitting data from a sender node to a receiver node in a wireless network including (a) sampling a main network frequency and at least one backup frequency, (b) transmitting a message on the main network frequency without using a multiple access protocol, (c) transmitting the message on the main network frequency, using the multiple access protocol exchange, if an acknowledgement is not received, (d) transmitting the message on at least one backup frequency, using a multiple access protocol, if the main network frequency is busy after (c), (e) repeating (c) and (d) for a predefined number of time slots, until an acknowledgement is received, (f) transmitting the message on each backup frequency, using the multiple access protocol, until an acknowledgment is received, and (g) performing an exponential backoff and subsequent transmission of the message if an acknowledgement is still not received after (a) through (f).


