Remote SIM Interface Circuit for Wireless Node Signal Integrity
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving good cellular network reception without moving the communication apparatus or using long antenna cables, which are costly and prone to signal loss, especially when different frequency bands require different cables.
Innovation Solution
A wireless communication system comprising a first and second network node with SIM card interfaces and ports, connected via a CAT-5 cable with a data interface circuit, allowing for the exchange of SIM card information over a distance, using a bi-directional level shifter to maintain signal integrity and reduce signal degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a long antenna cable is used to connect the wireless communication apparatus to the external antenna, then the reception quality is improved, but the cost increases and signal loss occurs
Solution Approach 1:
The patent introduces an intermediary device (SIM card emulator or remote SIM reader) that acts as a mediator between the wireless communication apparatus and the SIM card. This intermediary is placed close to the apparatus and communicates with it via short cables, eliminating the need for long antenna cables while maintaining system functionality. The intermediary handles SIM card operations locally and establishes remote connections through alternative means.
Solution Approach 2:
The patent replaces the mechanical/electrical connection system (long physical antenna cables) with an alternative communication approach. Instead of using long cable connections for SIM card operations, the system uses short local cable connections combined with wireless or alternative communication protocols to achieve the same functional goals without the drawbacks of long cable runs.
2Reliability
If different antenna cables are used for different frequency bands, then the reception quality is improved, but the device complexity and operational cost increase
Solution Approach 1:
The patent applies universality by making the intermediary device capable of handling multiple frequency bands and communication protocols through software or configuration rather than requiring different physical cables for each band. The SIM card emulator or remote SIM reader can be programmed to support various frequency bands, eliminating the need for multiple specialized cable types and simplifying cable management.
Solution Approach 2:
The patent changes the approach from physically different cables for different parameters (frequency bands) to a single cable system where the parameters are changed through software configuration or electronic settings. The intermediary device can adapt its operation to different frequency bands without requiring physical cable changes, thus reducing device complexity.
3Reliability
If the wireless communication apparatus is moved to achieve good reception, then the reception quality is improved, but the operational flexibility is reduced
Solution Approach 1:
The patent introduces an intermediary device that separates the wireless communication apparatus from the SIM card physically while maintaining logical connection. This allows the apparatus to remain in fixed locations with good reception while the intermediary can be positioned optimally or remotely accessed, providing operational flexibility without compromising reception quality.
Data Source
AI summary
A circuitry and a wireless communication system for carrying SIM card data over a distance. The wireless communication system comprises a first network node and a second network node. A SIM card can be placed in the first network node. SIM card data can be retrieved from or written to the SIM card by a second node via a cable. Other data communications between the first network node and the second network node is carried by another cable. In one variant, the other capable also carry electricity from one of the network node to the other network node. In one variant, the circuitry for carrying SIM card data comprises a plurality of buffers, resistors, capacitors and bi-directional level shifters.