Skip Notification and High-Speed Retransmission Timer for XR Traffic
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Solution Overview
Problem
Existing communication control methods in mobile communication systems face challenges in efficiently managing retransmissions for XR traffic, leading to delays and inefficiencies, especially when retransmissions are not necessary.
Innovation Solution
The proposed communication control method involves transmitting a skip notification to the user equipment when a base station or user equipment does not retransmit a packet, and configuring a high-speed retransmission timer with a shorter value than a reference timer when retransmissions are necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a base station or user equipment does not retransmit a packet and transmits a skip notification, then communication efficiency is improved by avoiding unnecessary retransmissions, but delays may occur if the receiving end does not promptly process the skip notification
Solution Approach 1:
The receiving end is pre-configured with a high-speed retransmission timer before receiving the skip notification. When the skip notification is received, if the timer is still running, it is stopped immediately and the packet is processed without waiting for retransmission. This preliminary configuration enables rapid response to skip notifications, preventing processing delays while maintaining communication efficiency.
Solution Approach 2:
The system dynamically adjusts the retransmission behavior based on the skip notification. The high-speed retransmission timer is configured to be shorter than reference timers, creating a dynamic timing mechanism that adapts to the actual retransmission needs. This dynamic approach allows the system to quickly switch between waiting for retransmission and processing packets immediately, optimizing both efficiency and timing.
2Productivity
If a high-speed retransmission timer with a shorter value is configured, then retransmission packets are received earlier improving communication efficiency, but the timer management complexity increases
Solution Approach 1:
Instead of using a single uniform timer for all retransmission scenarios, the system implements a high-speed retransmission timer with a shorter value specifically for cases where skip notifications may be sent. This localized timer optimization allows faster processing in specific scenarios without affecting other communication flows, improving efficiency while keeping the complexity localized to specific timer management logic.
Solution Approach 2:
The system changes the timer parameter (duration) based on the communication scenario. A high-speed retransmission timer with a shorter value is configured specifically for XR traffic or scenarios where skip notifications are expected, while reference timers with longer values are used for other scenarios. This parameter differentiation optimizes performance for specific use cases without unnecessarily complicating the overall timer management system.
3Productivity
If skip notifications are transmitted to indicate skipped retransmissions, then unnecessary retransmissions are avoided improving efficiency, but additional signaling overhead is introduced
Solution Approach 1:
The skip notification function is extracted as a separate, dedicated signaling mechanism rather than being embedded within existing retransmission protocols. This extraction allows the system to send concise skip notifications only when necessary (when retransmission is actually skipped), avoiding the overhead of full retransmission protocols for every packet while maintaining clear communication about retransmission status.
Data Source
AI summary
A communication control method according to one aspect is a communication control method in a mobile communication system. The communication control method includes the steps of, at a base station: transmitting, to a user equipment, a skip notification indicating that transmission of a transmission packet is skipped when the base station does not retransmit the transmission packet; and configuring, for the user equipment, a timer value of a high-speed retransmission timer having a shorter timer value than a reference timer when the base station retransmits the transmission packet.