Adaptive Poll Retransmit Timers for Delay-Critical Wireless Packets
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Solution Overview
Problem
Existing wireless network protocols face challenges in efficiently managing retransmissions of delay-critical packets, leading to potential delays and resource wastage, particularly in applications like extended reality (XR) that require timely data delivery.
Innovation Solution
Adaptive selection of poll retransmit timers based on conditions such as packet importance and delay-critical status, allowing for faster retransmissions of delay-critical packets to prevent window stalling and ensure timely delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a fixed poll retransmit timer is used, then the protocol is simple to implement, but delay-critical packets experience unnecessary delays and window stalling
Solution Approach 1:
The poll retransmit timer is transformed from a fixed value to a dynamic value that adapts based on packet characteristics. The timer value changes depending on whether packets are delay-critical or not, allowing the system to optimize retransmission timing for different traffic types without requiring completely separate protocols.
Solution Approach 2:
The timer parameter is modified based on the importance and delay-critical status of packets. By changing the timer value parameter according to packet characteristics, the system achieves faster retransmission for urgent packets while maintaining reasonable timing for non-critical packets, directly addressing the time loss problem.
2Speed
If frequent polling is performed, then retransmission speed improves, but network resources are wasted
Solution Approach 1:
Different polling behaviors are applied to different packet types. Delay-critical packets trigger frequent polling with shorter timers to ensure fast retransmission, while non-critical packets use longer timers and less frequent polling, reducing unnecessary network activity and resource consumption for packets that don't require urgent delivery.
Solution Approach 2:
The polling frequency is made dynamic rather than constant. The system adjusts polling intensity based on the specific needs of transmitted packets, increasing frequency only when necessary for delay-critical traffic and reducing frequency for other traffic, thereby optimizing the balance between speed and resource usage.
3Productivity
If standard retransmission timing is used, then protocol simplicity is maintained, but window stalling occurs and delays increase
Solution Approach 1:
The system performs preliminary classification of packets as delay-critical or non-critical before transmission. This advance identification allows the appropriate timer value to be selected in advance, preventing window stalling before it occurs rather than reacting to it afterward, thus maintaining high throughput without requiring complex real-time decision logic.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor transmission status and packet characteristics to inform timer selection. By using feedback about packet importance and delivery status, the system can dynamically adjust timer values to prevent window stalling and optimize throughput without requiring overly complex predetermined logic.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods for adaptive selection or control of a poll retransmit timer or timer value.