Dual Mobile Radio Module Antenna Switching for Vehicle Telephony
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Solution Overview
Problem
The challenge is to provide robust voice telephony in motor vehicles with minimal circuit complexity, especially when dealing with new telecommunication standards like LTE, which may not be reliably supported by mobile radio networks, necessitating a redundant fallback solution.
Innovation Solution
A mobile radio apparatus with two modules, one for LTE/UMTS/GSM and another for GSM, sharing two antennas with a switching device to optimize signal transmission and reception by switching between antennas based on signal quality and usage scenarios, ensuring reliable voice and data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two mobile radio modules are provided for different standards (LTE, UMTS, GSM), then reliability is improved through redundant fallback solutions, but device complexity increases
Solution Approach 1:
The patent merges two mobile radio modules (first for LTE/UMTS/GSM, second for GSM) into a single apparatus that shares common resources including two antennas and a switching device. The modules are integrated to work cooperatively, with the switching device dynamically allocating antenna resources between them based on operational needs, thereby reducing overall circuit complexity while maintaining reliability through redundant standards support
Solution Approach 2:
The switching device serves multiple functions: it switches between different mobile radio modules, allocates antennas dynamically, and enables both modules to share the same antenna resources. This multi-functional approach allows the system to maintain multiple communication standards (LTE, UMTS, GSM) without requiring separate dedicated antenna circuits for each module, thus improving reliability while controlling complexity
2Quantity of substance
If two antennas are shared between two mobile radio modules, then bandwidth is preserved, but signal interference may occur
Solution Approach 1:
The switching device dynamically allocates antenna resources between the two mobile radio modules based on real-time operational conditions. When the first module is actively transmitting or receiving signals, the switching device connects it to the appropriate antenna while isolating the second module. This dynamic switching prevents signal interference between modules while preserving bandwidth by ensuring continuous antenna utilization across different communication standards
Data Source
AI summary
A mobile radio apparatus for a motor vehicle has a first mobile radio module and a second mobile radio module. Furthermore, a first antenna and a second antenna are provided for transmitting mobile radio signals. To provide robust voice telephony for the motor vehicle that can be implemented with little circuit complexity, a switching device is connected to the antennas and to a respective signal connection of the mobile radio modules and that is designed to take a switching signal as a basis for changing over between a first switching state, in which the first signal connection is coupled to the first antenna and the second signal connection is coupled to the second antenna, and a second switching state, in which the first signal connection is coupled to the second antenna and the second signal connection is coupled to the first antenna.