Adaptive Channel Coding for Vehicle-to-X Communication
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Solution Overview
Problem
Existing channel coding methods in mobile communication environments, such as those used in vehicle-to-X communication, often require excessive redundancy, leading to increased channel load and reduced transmission efficiency, as they rely on feedback from receivers to adapt coding configurations, which is not feasible in real-time, especially when interference is unpredictable.
Innovation Solution
A method that uses environment data and relative orientation information to predict the success of data packet decoding before transmission, allowing the transmitter to switch between coding configurations without receiver feedback, using a radio link model and potentially an artificial neural network to determine the necessity for increased redundancy, thereby optimizing channel coding on the fly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional redundancy is added to data packets through channel coding to protect against interference, then the probability of successful decoding is improved, but the transmission rate decreases and channel load increases
Solution Approach 1:
The patent applies dynamics by making the channel coding configuration adaptive rather than static. The transmitter dynamically adjusts the coding configuration based on real-time radio link quality assessments and environmental conditions, allowing the system to optimize between reliability and transmission rate according to current channel conditions
Solution Approach 2:
The patent changes parameters by adjusting coding configuration parameters (such as redundancy level, coding rate) based on assessed radio link quality and environmental data. This allows the system to modify the degree of redundancy added to packets, thereby balancing error protection needs against transmission efficiency
2Loss of time
If blind HARQ is used to add redundancy without receiver feedback, then the response time is improved, but unnecessary redundancy increases channel load and causes packet collisions
Solution Approach 1:
The patent applies preliminary action by assessing radio link quality and environmental conditions before transmitting data packets. This pre-transmission assessment allows the transmitter to determine the appropriate coding configuration in advance, avoiding the need for reactive retransmissions while preventing unnecessary redundancy from being added to packets that don't need it
Solution Approach 2:
The system applies self-service by using locally available environmental data and radio link quality assessments to make autonomous coding configuration decisions without requiring external feedback. The transmitter independently determines optimal redundancy levels based on its own measurements and stored environmental information
3Adaptability or versatility
If area survey is conducted to select appropriate coding configurations, then the adaptability is improved, but the complexity and time required for configuration increases
Solution Approach 1:
The patent applies local quality by using location-specific environmental data stored in databases to determine appropriate coding configurations. Instead of conducting comprehensive area surveys, the system retrieves pre-stored environmental characteristics for the specific current location, enabling rapid adaptation to local conditions without complex global analysis
Solution Approach 2:
The patent applies preliminary action by pre-storing environmental data and coding configuration recommendations in databases before actual transmission occurs. This allows the system to quickly retrieve and apply appropriate configurations based on current location without performing complex real-time analysis, thereby reducing configuration complexity and time
Data Source
AI summary
The present disclosure relates to a method for configuring a channel coding during a transmission of data packets from a transmitter to a receiver, which are both located in a traffic environment, wherein a control apparatus of the transmitter ascertains environment data, describing the traffic environment, and orientation data, describing a relative orientation of the transmitter and the receiver, and the environment data and the orientation data are taken as a basis for using a radio link model to forecast, by means of a forecast, whether a currently selected coding configuration of the channel coding can be used to successfully decode and/or reconstruct a data packet currently needing to be sent in the receiver, and if the forecast signals a lack of success, then a switch is effected to an extended coding configuration that produces greater redundancy than the current coding configuration, and the data packet to be sent is sent using the extended coding configuration.