Wireless Transceiver Coordination for Vehicular Network Interference
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Solution Overview
Problem
In vehicular communication networks, adjacent and near channel interference between wireless transceivers operating on different electromagnetic channels leads to spurious carrier sense issues and hidden node problems, particularly in ad hoc networks where transceivers are not stationary and available channels are adjacent or near, causing interference that affects transmission and reception reliability.
Innovation Solution
A method that prevents overlapping packet transmissions by checking for ongoing and scheduled activities on other channels, deferring transmissions until completion, and implementing a pipelined transmission schedule to ensure low latency and minimize interference, utilizing interaction between the physical and MAC layers without requiring static system parameters or external node interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wireless transceivers operate simultaneously on adjacent or near electromagnetic channels, then communication versatility and throughput are improved, but adjacent channel interference occurs causing spurious carrier sense and hidden node problems
Solution Approach 1:
The patent applies preliminary action by checking for ongoing transmissions on interfering channels before initiating a new transmission. The transceiver queries the status of other channels and defers transmission until no interference is detected, preventing adjacent channel interference before it occurs. This is implemented through the method steps of checking ongoing transmissions and deferring packet transmission when interference is detected.
Solution Approach 2:
The patent implements feedback by continuously monitoring the status of electromagnetic channels and using this information to control transmission timing. The transceiver receives feedback about ongoing transmissions on adjacent or near channels and adjusts its transmission schedule accordingly, creating a closed-loop system that adapts to real-time channel conditions.
2Reliability
If transceivers defer transmissions to avoid interference, then transmission reliability is improved, but transmission latency increases
Solution Approach 1:
The patent applies dynamics by implementing a dynamic transmission scheduling system that adapts to real-time channel conditions. Rather than using fixed time slots or static channel assignments, the system continuously monitors channel status and dynamically adjusts transmission timing, allowing transmissions to proceed as soon as interference conditions clear, thus minimizing latency while maintaining reliability.
Solution Approach 2:
The patent uses preliminary action by checking channel status before transmission and only deferring when necessary. This selective deferral approach minimizes unnecessary delays while ensuring that transmissions only occur when interference-free conditions are confirmed, balancing reliability requirements with latency optimization.
3Adaptability or versatility
If a dual transceiver system is used for vehicular communication, then communication capability on multiple channels is improved, but device complexity and coordination requirements increase
Solution Approach 1:
The patent applies merging by combining the control functions of multiple transceivers under a single coordination mechanism. The system merges channel status monitoring, transmission scheduling, and interference detection into one unified control process, reducing the complexity that would arise from independent control of each transceiver while maintaining multi-channel communication capability.
Solution Approach 2:
The patent implements universality by creating a general-purpose coordination mechanism that can manage multiple transceivers on different channels through a single standardized process. The coordination system performs multiple functions including interference detection, transmission scheduling, and channel status monitoring, reducing overall system complexity through functional consolidation.
Data Source
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AI summary
A method for coordination of wireless transceivers of a network node, in particular for application in communication nodes of a vehicular network, wherein said network node is equipped with one or more wireless transceivers that are capable of simultaneously generating and/or receiving electromagnetic signals on different electromagnetic channels, said electromagnetic signals being potentially able to interfere with each other, is characterized in the steps of, for each pending packet transmission on a particular of said electromagnetic channels, checking the presence of ongoing and/or scheduled activity on one or more of the other of said electromagnetic channels, and deferring said pending packet transmission in case ongoing and/or scheduled activity is detected on one or more of the other of said electromagnetic channels, at least until said detected ongoing and/or scheduled activity on one or more of the other of said electromagnetic channels is completed. Furthermore, a corresponding network node is disclosed.