SMS Re-Transmission Timer Segmentation for Mobile Reliability
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Solution Overview
Problem
Current mobile communication systems face challenges in ensuring successful short message service re-transmission due to temporary channel conditions between user equipment and network apparatus, leading to high failure rates when timer values for re-transmissions are not compatible, causing issues in GSM, GPRS, LTE, and 5G networks.
Innovation Solution
Implementing a method where the user equipment determines a first and second timer value for re-transmitting control plane-data messages, with the second timer value being smaller than the first, allowing for multiple re-transmissions before the initial timer expires, ensuring compatibility and reducing failure rates by aligning timer values for successful message delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single timer value is used for SMS re-transmission, then the re-transmission mechanism is simple, but the channel condition variations cause high failure rates
Solution Approach 1:
The patent segments the re-transmission process into multiple phases with different timer values. A first timer value is used for initial re-transmission attempts, and a second timer value is used for subsequent re-transmission attempts. This segmentation allows the system to adapt to varying channel conditions at different stages of re-transmission, thereby improving reliability without requiring a single complex timer management mechanism.
Solution Approach 2:
The patent implements dynamic timer value adjustment based on re-transmission stage. The system transitions from a first timer value to a second timer value depending on whether the message requires re-transmission. This dynamic approach enables the system to respond flexibly to channel conditions, improving SMS delivery reliability while maintaining manageable complexity through stage-based timer selection.
2Reliability
If the timer value for re-transmission is extended to allow more re-transmission attempts, then the reliability improves, but the time required for message delivery increases
Solution Approach 1:
The patent segments the total re-transmission time into two distinct phases with different timer values. The first timer value covers initial re-transmission attempts, and the second timer value covers subsequent attempts. This segmentation allows the system to achieve high reliability through multiple re-transmission opportunities while managing time consumption by using shorter first timer values and only extending to second timer values when necessary, thus balancing reliability and time loss.
Solution Approach 2:
The patent employs dynamic timer value selection based on the re-transmission stage. The system uses a first timer value for initial attempts and switches to a second timer value only when needed for subsequent re-transmission. This dynamic adjustment allows the system to maintain fast message delivery under good channel conditions while providing extended time for re-transmission only when failures occur, thereby improving reliability without consistently increasing time loss.
Data Source
AI summary
Various solutions for short message service re-transmission with respect to user equipment and network apparatus in mobile communications are described. An apparatus may transmit a control plane-data (CP-DATA) message for initiating mobile originated short message service (MO SMS). The apparatus may determine a first timer value for first transmission of the CP-DATA message. The apparatus may further re-transmit the CP-DATA message in response to expiration of the first timer value. The apparatus may further determine a second timer value for re-transmission of the CP-DATA message. The second timer value may be smaller than the first timer value.