Seismic Wireless Modules Dynamic Multiplexing Collision Avoidance
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Solution Overview
Problem
Seismic data transmission in wireless seismic surveys often experiences bandwidth reduction due to data collisions among wireless modules using random or pseudo-random multiplexing signatures, leading to increased time and cost, especially as the number of units within a collision domain increases.
Innovation Solution
Assigning a shared multiplexing sequence to seismic data acquisition modules, where each module advances sequentially through a plurality of multiplexing signatures, and ensuring that modules within a collision domain operate out of phase with respect to the shared sequence to minimize data collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If random or pseudo-random multiplexing signatures are used for wireless data transmission, then data transmission can occur simultaneously among multiple modules, but data collisions increase and bandwidth is reduced
Solution Approach 1:
The patent applies dynamics by making the multiplexing signature assignment dynamic rather than static. Modules randomly select multiplexing signatures from an expanded pool of available signatures, and the system dynamically adjusts the number of available signatures based on the number of active modules. This dynamic adaptation reduces data collisions while maintaining simultaneous transmission capability.
Solution Approach 2:
The patent changes the parameter of multiplexing signature pool size. By increasing the number of available multiplexing signatures beyond the number of modules and dynamically adjusting this parameter based on active module count, the system reduces the probability of signature collisions while preserving parallel transmission efficiency.
2Quantity of substance
If more wireless modules are deployed in a seismic array, then survey coverage and data quality improve, but the probability of data collisions increases
Solution Approach 1:
The patent changes the parameter of multiplexing signature availability by dynamically expanding the pool of available signatures as more modules are deployed. This ensures that even with increased module quantity, the probability of data collisions remains low because each module has access to a sufficiently large pool of unique signatures.
Solution Approach 2:
The system dynamically adapts to the number of active modules by adjusting the multiplexing signature pool size. This dynamic parameter adjustment allows the system to scale with the number of sensors while maintaining transmission reliability, preventing the collision probability from increasing linearly with module count.
3Loss of time
If real-time wireless data readout is implemented, then survey verification time is reduced, but bandwidth usage must be carefully managed to avoid slowing the survey
Solution Approach 1:
The patent implements periodic action through time-division multiplexing where modules transmit data in periodic time slots assigned by the coordinator. This structured periodic transmission enables real-time data readout for immediate verification while managing bandwidth usage systematically, preventing congestion that would slow down the survey.
Solution Approach 2:
The system dynamically allocates time slots and multiplexing signatures based on real-time survey conditions and module activity. This dynamic resource allocation enables efficient real-time data retrieval while adapting bandwidth usage to actual survey needs, maintaining overall survey conduct speed.
Data Source
AI summary
Systems and methods for seismic data acquisition utilizing wireless modules to perform real time data read out. The wireless modules may be assigned a shared multiplexing sequence through which each module advances in successive transmission periods. Wireless modules belonging to a shared collision domain may be operated out of phase from one another with respect to the shared multiplexing signature sequence. As such, a dynamic multiplexing regime may be implemented. The shared multiplexing signature sequence may include, among others, a plurality of different frequencies, a plurality of different codes, or a plurality of different discrete time periods.