Wireless Message Retransmission Timing for Power Saving Devices
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Solution Overview
Problem
Wireless communication networks struggle to effectively and efficiently select message retransmission times when user devices are in power saving mode, leading to message delivery failures.
Innovation Solution
A method and system that involve a network control plane determining an adjustment time based on the elapsed time between a power saving mode timer expiration and an update message, calculating a retransmission time based on the remaining timer duration, and directing messaging servers to resend messages during designated paging windows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the messaging server retransmits the message before the user device notifies the network that it is reachable, then message delivery can be attempted earlier, but message delivery fails
Solution Approach 1:
The network control plane determines an adjustment time based on the elapsed time between the power saving mode timer expiration and the update message, then uses this adjustment time to calculate the optimal retransmission time. This preliminary calculation ensures the message is retransmitted at the right moment when the device is reachable, rather than attempting premature delivery.
Solution Approach 2:
The system uses feedback from the device's power saving mode behavior (the time between timer expiration and update message) to learn and adjust future retransmission timing. By analyzing the device's actual wake-up patterns, the network adapts its retransmission strategy to match device availability, improving delivery reliability.
2Reliability
If the network waits for the device to notify reachability before retransmitting, then message delivery succeeds, but message delivery is delayed
Solution Approach 1:
The network control plane performs preliminary calculations to determine the adjustment time and optimal retransmission time in advance, using the device's power saving mode parameters and observed behavior patterns. This allows the network to proactively schedule retransmission at the optimal moment rather than reactively waiting for device notifications.
Solution Approach 2:
The retransmission timing is dynamically adjusted based on the device's actual power saving mode behavior and wake-up patterns. The system learns from each power saving cycle and adapts the retransmission time calculation to match the specific device's availability patterns, optimizing both reliability and timing.
Data Source
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AI summary
Various embodiments include a wireless communication network that comprises a control plane. The control plane receives a power saving mode entry message from a wireless user device. The control plane indicates a current power saving mode timer to the wireless user device. The control plane determines an adjustment time based on an amount of time elapsed between an initial power saving mode timer and a power saving mode exit message associated with the wireless user device. The control plane receives a message forwarding request for the wireless user device from a messaging server before the current power saving mode timer has expired. The control plane determines a retransmission time based on an amount of time remaining on the current power saving mode timer and the adjustment time. The control plane directs the messaging server to retransmit the message forwarding request at the retransmission time.