Deferred Acknowledgment for Application Data Over Discontinuous Connectivity
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Solution Overview
Problem
Transmission of application data between terminal devices and application servers is hindered by discontinuous connectivity, leading to inefficient and resource-consuming redundant retransmissions due to delayed acknowledgments.
Innovation Solution
A terminal device receives an indication from an access network device that an acknowledgment for application data is to be deferred, prompting it to avoid retransmission, thereby reducing redundant data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device waits for acknowledgment and retransmits application data when connectivity is lost, then data reliability is improved, but transmission time and network resources are consumed
Solution Approach 1:
The access network device performs preliminary action by deferring the acknowledgment to a later time when connectivity is restored, rather than immediately failing when connectivity is lost. This allows the terminal device to avoid unnecessary retransmission attempts during disconnected periods, resolving the contradiction between reliability and time loss.
Solution Approach 2:
The system implements feedback through the deferred acknowledgment mechanism, where the access network device informs the terminal device of successful data reception at a later time. This feedback loop allows the terminal to stop retransmission attempts once it receives the deferred acknowledgment, optimizing both reliability and time efficiency.
2Reliability
If the terminal device continuously monitors for acknowledgment and attempts retransmission, then data delivery is ensured, but network resources are wasted
Solution Approach 1:
The access network device performs preliminary action by preparing to defer the acknowledgment rather than immediately processing retransmission requests. This preliminary decision prevents the terminal from wasting network resources on futile retransmission attempts during disconnected periods, while still ensuring data delivery when connectivity is restored.
Solution Approach 2:
The deferred acknowledgment acts as an intermediary mechanism between the terminal device and the application server. It mediates the communication by temporarily suspending the acknowledgment delivery until connectivity is restored, preventing the terminal from wasting resources on retransmission while maintaining data delivery assurance.
3Speed
If the access network device immediately processes retransmission requests, then response speed is improved, but discontinuous connectivity causes unnecessary retransmission
Solution Approach 1:
The access network device performs preliminary action by deferring the acknowledgment processing to a later time when connectivity is confirmed. This preliminary decision prevents the generation of harmful redundant retransmission, while still maintaining fast response by processing the acknowledgment as soon as connectivity is restored.
Solution Approach 2:
The system converts the harmful effect of discontinuous connectivity into a benefit by using the connectivity interruption as a trigger to defer the acknowledgment. This transforms the problematic discontinuous connectivity into a mechanism that prevents redundant retransmission, turning a harmful factor into a beneficial control signal.
Data Source
AI summary
Embodiments of the present disclosure relate to data transmission for discontinuous connectivity. A terminal device receives, from an access network device, an indication that an acknowledgement for application data from the terminal device is to be deferred. The terminal device avoids retransmitting the application data based on the indication. As such, redundant retransmissions of the application data can be avoided.