Dynamic Call-Based User ID for Shared Subscriber Units
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Solution Overview
Problem
Current wireless communication systems for public safety agencies face challenges in user ID provisioning and talkgroup allocation, making it difficult to share subscriber units and allow users to assume different roles, especially when there are more users than radios or when users change roles or channels.
Innovation Solution
The system uses a spoken call sign as a subscriber ID, dynamically associating it with a unique subscriber unit ID, allowing shared use of subscriber units and role changes without reprovisioning, by detecting and recognizing voice patterns to establish and manage calls within the communication system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional user ID provisioning is used, then each user requires a unique radio, but it becomes difficult to share subscriber units among multiple users and allow users to assume different roles
Solution Approach 1:
The patent implements dynamic user ID assignment where the radio automatically retrieves and switches between user IDs based on voice-recognized call signs. The system transitions from static one-to-one user-radio mapping to dynamic many-to-many mapping, enabling a single radio to serve multiple users and roles through automated ID retrieval from the infrastructure database.
Solution Approach 2:
The infrastructure database acts as an intermediary between the voice call sign and the subscriber unit ID. When a user speaks a call sign, the system queries the infrastructure database to resolve the call sign to the corresponding SUID, enabling indirect addressing without manual provisioning. This intermediary layer decouples the user interface from the radio identification system.
2Measurement precision
If targeted group calls are used to address specific users, then communication precision is improved, but there is no means to ensure the targeted radio received the call or to detect if the user is on the wrong channel
Solution Approach 1:
The system implements feedback mechanisms where the targeted radio acknowledges receipt of calls by responding to the voice prompt. The infrastructure tracks call delivery status and can notify the calling party whether the target radio received and acknowledged the call. This closed-loop feedback system provides both precision in targeting and reliability in delivery confirmation.
3Reliability
If manual user ID provisioning is required for each user, then unique identification is ensured, but provisioning becomes challenging when users change subscriber units or roles
Solution Approach 1:
The system performs preliminary actions by pre-populating the infrastructure database with call sign to SUID mappings before communication occurs. User profiles, call signs, and associated subscriber unit IDs are stored in advance in the infrastructure database, enabling rapid retrieval and switching without real-time provisioning delays.
Solution Approach 2:
The radio performs self-service by automatically retrieving the appropriate user ID from the infrastructure database based on voice-recognized call signs. The system eliminates manual provisioning operations by enabling the radio to autonomously resolve call signs to SUIDs and switch identities without user intervention or administrator involvement.
Data Source
AI summary
A dynamic call based user ID allows subscriber units to be shared amongst a plurality of users or used for a plurality of roles/uses. A voiced call sign is transmitted by a calling subscriber unit to a targeted subscriber unit. A pattern in the voice transmission of the calling unit is detected, and the voiced call sign is compared to a list of pre-stored call signs. When a match between stored calls signs and the current call sign occurs, the calling subscriber unit saves the current call sign. Fixed network equipment (FNE) then associates the saved current call sign with a subscriber unit ID (SUID) of the calling unit. The dynamic association between the call sign and the SUID allows the subscriber unit to be shared amongst different users and for different uses/roles.