LTE SMS Duplication Prevention via Acknowledgment Feedback
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Solution Overview
Problem
Existing SMS message transmission systems often result in duplicate messages due to communication link disruptions between user equipment and mobile communications networks, leading to inefficiencies and user experience issues.
Innovation Solution
Implementing a mechanism where user equipment (UE) sends an SMS message and waits for a confirmation (RP-ACK) from the mobile communications network, and upon receiving it, sends a confirmation (CP-ACK) to prevent retransmission, with the option to maintain communication links using supplementary information elements to ensure message delivery without duplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the communication link is severed between user equipment and mobile communications network, then message transmission may be interrupted, but duplicate messages are generated when the link is reestablished
Solution Approach 1:
The patent implements an acknowledgment feedback mechanism where the mobile communications network sends an RP-ACK message to the user equipment confirming successful receipt of the SMS. The user equipment then sends a CP-ACK confirmation message back to indicate it has received the RP-ACK. This feedback loop allows the user equipment to track message transmission status and suppress duplicate transmissions when the communication link is reestablished after being severed.
Solution Approach 2:
The patent applies preliminary action by maintaining the message transmission state information in the user equipment's transmission buffer even when the communication link is severed. The user equipment preserves knowledge of which messages have been sent and are awaiting acknowledgment, allowing it to prevent duplicate transmissions before they can occur when the link is reestablished.
2Object-generated harmful factors
If the user equipment waits for confirmation before sending the next message, then duplicate messages are prevented, but transmission time increases
Solution Approach 1:
The patent applies partial action by implementing selective waiting - the user equipment waits for RP-ACK confirmation only for messages that are in the transmission buffer awaiting acknowledgment. For other messages that have already been confirmed or are not in the buffer, normal transmission proceeds without delay. This selective approach prevents duplicates where needed while minimizing overall transmission time.
3Reliability
If communication links are maintained established, then message delivery is ensured, but network resources are consumed
Solution Approach 1:
The patent applies preliminary action by including supplementary information elements in the initial message transmission that indicate the user equipment's willingness to maintain the communicative connection for a predetermined time period. This allows the network to proactively maintain the connection without requiring continuous resource allocation, balancing reliability with resource efficiency.
Solution Approach 2:
The patent implements dynamic connection management where the connection maintenance status changes over time. The connection is maintained established for a predetermined time period after message transmission to ensure reliable delivery, then allowed to be severed to conserve network resources. This dynamic approach adapts the connection state to the actual needs of message delivery.
Data Source
AI summary
Sending short message service (SMS) messages and receiving a response report based at least in part on the sent SMS message, even if a communicative connection with the mobile communications network had been severed, so that duplication of the SMS message is avoided is disclosed. In this case, a communicative connection may be re-established and used to receive an acknowledgment from the mobile communications network and subsequently send another acknowledgement to the mobile communications network. The UE may also be configured to send an information element to the one or more elements of the mobile communications network to indicate that a communicative connection with the network is to remain established so that acknowledgements may be reconciled between the UE and the network. Additionally, the mobile communications network may be configured to transmit the SMS message only after receiving the acknowledgement from the UE, to avoid sending duplicate SMS messages.