Selective Packet Duplication in Multi-Hop Backhaul Networks
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Solution Overview
Problem
Existing methods for packet duplication in multi-hop networks, such as IAB networks, lead to inefficiencies in radio resource usage, increased latency, and waste of processing and energy resources, as IAB nodes cannot directly benefit from split bearer and duplication features due to lack of PDCP termination.
Innovation Solution
A method for handling packet transmission in a communications network that involves determining whether to duplicate packets between nodes, including intermediate nodes, and sending packets based on this determination to optimize resource use and enable reliable, low-latency delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication is performed across all hops in multi-hop networks, then reliability of packet delivery is improved, but radio resources are wasted and energy is consumed unnecessarily
Solution Approach 1:
The patent applies local quality by enabling packet duplication only at specific intermediate nodes where link quality degrades or where problematic links are detected, rather than uniformly across all hops. Each node assesses local link conditions and applies duplication selectively based on quality metrics, thus improving reliability only where needed while conserving energy in segments with good link quality.
Solution Approach 2:
The patent implements dynamic packet duplication where intermediate nodes continuously monitor link quality and adaptively adjust duplication behavior in real-time. When link quality deteriorates below thresholds or problems are detected, duplication is activated; when quality improves, duplication is reduced or stopped. This dynamic approach ensures reliability is maintained during degraded conditions while avoiding energy waste during normal operation.
2Reliability
If packet duplication is performed across all hops in multi-hop networks, then reliability of packet delivery is improved, but radio resources are wasted
Solution Approach 1:
The patent applies local quality by enabling packet duplication only at specific intermediate nodes where link quality degrades or where problematic links are detected, rather than uniformly across all hops. Each node assesses local link conditions and applies duplication selectively based on quality metrics, thus improving reliability only where needed while conserving radio resources in segments with good link quality.
Solution Approach 2:
The patent implements dynamic packet duplication where intermediate nodes continuously monitor link quality and adaptively adjust duplication behavior in real-time. When link quality deteriorates below thresholds or problems are detected, duplication is activated; when quality improves, duplication is reduced or stopped. This dynamic approach ensures reliability is maintained during degraded conditions while avoiding radio resource waste during normal operation.
3Reliability
If packet duplication is performed across all hops in multi-hop networks, then reliability of packet delivery is improved, but latency is increased
Solution Approach 1:
The patent applies local quality by enabling packet duplication only at specific intermediate nodes where link quality degrades or where problematic links are detected, rather than uniformly across all hops. Each node assesses local link conditions and applies duplication selectively based on quality metrics, thus improving reliability only where needed while minimizing additional latency in segments with good link quality.
Solution Approach 2:
The patent implements dynamic packet duplication where intermediate nodes continuously monitor link quality and adaptively adjust duplication behavior in real-time. When link quality deteriorates below thresholds or problems are detected, duplication is activated; when quality improves, duplication is reduced or stopped. This dynamic approach ensures reliability is maintained during degraded conditions while minimizing latency during normal operation.
4Reliability
If packet duplication is performed across all hops in multi-hop networks, then reliability of packet delivery is improved, but processing resources are wasted
Solution Approach 1:
The patent applies local quality by enabling packet duplication only at specific intermediate nodes where link quality degrades or where problematic links are detected, rather than uniformly across all hops. Each node assesses local link conditions and applies duplication selectively based on quality metrics, thus improving reliability only where needed while reducing processing overhead in segments with good link quality.
Solution Approach 2:
The patent implements dynamic packet duplication where intermediate nodes continuously monitor link quality and adaptively adjust duplication behavior in real-time. When link quality deteriorates below thresholds or problems are detected, duplication is activated; when quality improves, duplication is reduced or stopped. This dynamic approach ensures reliability is maintained during degraded conditions while minimizing processing resource consumption during normal operation.
Data Source
AI summary
A method performed by a first node, for handling transmission of one or more packets from a sending node to a receiving node. The first node operates in a communications network. The communications network comprises at least one intermediate node between the sending node and the receiving node. The first node determines whether or not to duplicate the one or more packets between the first node and a second node comprised in the communications network. The first node then sends, based on a result of the determination, at least one of the one or more packets and the one or more duplicates, over a Backhaul Adaptation Protocol, BAP, layer, or one or more Backhaul Radio Link Channels between the first node and the second node.