Group Data Acknowledgement via Synchronization Patterns
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in confirming the successful delivery of group data to multiple subscriber units in talk groups, particularly in large-scale operations, due to high bandwidth and time requirements for individual confirmation messages.
Innovation Solution
Implementing a bandwidth-efficient and time-efficient method where subscriber units receive a set of data blocks, determine successful receipt, and transmit a receive status message during a designated uplink time interval using synchronization patterns to indicate successful or unsuccessful receipt, allowing for simultaneous confirmation across multiple units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each SU sends individual confirmation messages to the base radio, then delivery confirmation reliability is improved, but bandwidth consumption increases and transmission time increases
Solution Approach 1:
Multiple SUs transmit their confirmation status messages simultaneously within a single designated uplink time interval, merging individual confirmations into a consolidated transmission window. This reduces the total number of sequential transmissions and decreases bandwidth consumption while maintaining reliable delivery confirmation for all SUs in the talk group.
Solution Approach 2:
The designated uplink time interval serves multiple functions: it acts as both a data transmission channel and a confirmation status reporting channel. By making the uplink resource universal, the system eliminates the need for separate dedicated confirmation messages, thereby reducing bandwidth consumption while maintaining confirmation reliability.
2Reliability
If each SU sends individual confirmation messages to the base radio, then delivery confirmation reliability is improved, but transmission time increases
Solution Approach 1:
The system implements periodic confirmation transmissions where all SUs are scheduled to transmit their status messages within periodic uplink time intervals. This structured periodic approach allows simultaneous confirmations from multiple SUs, significantly reducing the total transmission time compared to sequential individual confirmations while maintaining reliable delivery confirmation.
Solution Approach 2:
Multiple individual confirmation transmissions are merged into a single consolidated transmission window. By combining the confirmation actions of all SUs into one time interval, the system reduces the cumulative transmission time while ensuring that each SU's delivery status is reliably confirmed to the base radio.
3Quantity of substance
If unconfirmed delivery is used, then bandwidth consumption is reduced, but delivery confirmation capability is lost
Solution Approach 1:
Each SU autonomously determines its own reception status (successfully received or not) and self-transmits this status information during the designated uplink time interval. This self-service approach allows the system to maintain delivery confirmation capability without requiring complex centralized acknowledgment management, thereby minimizing bandwidth consumption while preventing loss of confirmation information.
Solution Approach 2:
The system implements a feedback mechanism where SUs transmit their reception status back to the base radio during designated uplink intervals. This feedback provides the base radio with delivery confirmation information without requiring continuous two-way communication, thus maintaining confirmation capability while keeping bandwidth consumption low through efficient use of uplink resources.
Data Source
AI summary
A method and apparatus for time-efficient confirmed group data acknowledgement includes a radio subscriber unit (SU) configured to (i) generate a receive status message comprising a first synchronization pattern indicating successful receipt of a set of data blocks when the SU has successfully received the set of data blocks from a base radio, (ii) generate a receive status message comprising a second synchronization pattern indicating unsuccessful receipt of a set of data blocks when the SU has not successfully received the set of data blocks from the base radio, and (iii) transmit the generated receive status message from the SU to the base radio during an uplink transmit time interval assigned by the base radio.