Radio Device Group Call Switching via Secondary Cipher Key
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Solution Overview
Problem
Conventional radio devices require complex procedures and increased time and effort to switch between group calls, necessitating temporary disconnection from the current group call to perform individual or group calls with different radio devices or groups.
Innovation Solution
A radio device equipped with a storage unit, group call control unit, and cipher key generation unit that stores primary cipher keys and generates secondary cipher keys for temporary group calls with selected radio devices or groups, allowing seamless switching without disconnecting from the original group call.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If switching of group calls is performed with a switching device, then group call switching is enabled, but the operation becomes complicated and requires increased time and effort
Solution Approach 1:
The radio device performs group call switching autonomously by generating a secondary cipher key and establishing a temporary group call with selected radio devices directly, without requiring external switching device intervention. This self-service capability simplifies operations while maintaining switching functionality.
Solution Approach 2:
The system pre-generates secondary cipher keys that are stored in the radio device, enabling rapid switching to temporary group calls without complex real-time computations. This preliminary preparation reduces operational complexity and switching time.
2Productivity
If temporary group call is performed by making individual calls to each desired radio device, then group call switching is achieved, but procedures become complicated and time-consuming
Solution Approach 1:
The invention merges multiple individual call procedures into a single temporary group call establishment process. By using a secondary cipher key, the system can simultaneously communicate with multiple selected radio devices through one group call channel, dramatically reducing switching time and procedural complexity.
Solution Approach 2:
The system changes the cipher key parameter from the primary key (used for original group call) to a secondary key (used for temporary group call). This parameter change enables rapid switching between different group call configurations without requiring complex reconfiguration procedures or individual call setups.
3Adaptability or versatility
If individual calls are made to switch group calls, then different radio devices can be reached, but the procedure complexity increases significantly
Solution Approach 1:
The temporary group call function serves multiple purposes: it enables communication with individually selected radio devices, maintains connection with the original group, and provides a simplified switching mechanism. This multi-functionality achieves high adaptability without increasing procedure complexity.
Data Source
AI summary
A radio device includes a storage unit, a group call control unit, and a cipher key generation unit. The storage unit is configured to store therein a plurality of primary cipher keys, a plurality of pieces of device information, and a plurality of pieces of group information. The group call control unit is configured to perform a group call with radio devices belonging to a first group using a primary cipher key. The cipher key generation unit is configured to generate a secondary cipher key that is different from the primary cipher key when one or more radio devices belonging to the first group are selected during the group call. The group call control unit performs a temporary group call with the selected radio devices by switching the primary cipher key to the secondary cipher key.