Wireless Backhaul Node Data Packet Duplication and Splitting
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Solution Overview
Problem
In 5G wireless communications, especially in IAB scenarios with multi-hop and multi-connection networks, the duplication of data packets and subsequent duplicate detection at the PDCP layer lead to inefficient use of transmission resources due to common links between paths, resulting in wasted resources and limited improvement in data packet transmission reliability and delay reduction.
Innovation Solution
A data transmission method where data packets are duplicated and transmitted through multiple paths, with duplicate detection performed at aggregation nodes, optimizing resource utilization by avoiding redundant transmissions over common links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data packets are duplicated and transmitted through multiple paths in IAB scenario, then transmission reliability is improved, but transmission resources are wasted due to common links between paths
Solution Approach 1:
The patent segments the data transmission process by introducing a first node that divides data packets into first data packets and second data packets. The first data packets are transmitted through a first path while the second data packets are transmitted through a second path. This segmentation allows the system to maintain multiple paths for reliability while avoiding redundant transmissions over common links by strategically dividing the data flow at the first node.
Solution Approach 2:
The patent introduces a first node as an intermediary between the data source and the terminal. This first node performs the critical function of dividing data packets into different sets that can be transmitted through different paths. The first node acts as a mediator that coordinates the transmission process, ensuring that data packets are distributed efficiently across multiple paths without causing resource waste on common links.
2Reliability
If duplicate detection is performed at PDCP layer, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the duplicate detection function by introducing a second node that performs duplicate detection separately for first data packets and second data packets. Instead of a single complex PDCP layer handling all packets, the system divides the detection process into separate instances at the second node, reducing the complexity burden on any single node while maintaining comprehensive duplicate detection capability.
Solution Approach 2:
The patent introduces a second node as an intermediary that handles duplicate detection for data packets received from multiple paths. This second node acts as a mediator that consolidates the duplicate detection function, making it more manageable and less complex than having every node perform full PDCP layer duplicate detection independently.
3Reliability
If data packets are transmitted through multiple paths, then transmission reliability is improved, but transmission delay increases
Solution Approach 1:
The patent segments the data packets into first data packets and second data packets that can be transmitted through different paths simultaneously. By dividing the data flow at the first node, the system enables parallel transmission across multiple paths, which reduces overall transmission delay while maintaining reliability through duplicate detection at the second node.
Solution Approach 2:
The patent ensures continuous and efficient data transmission by having the first node continuously divide data packets and the second node continuously detect duplicates. This continuous operation across multiple paths prevents transmission delays that would occur with sequential transmission, while the duplicate detection mechanism ensures that only necessary packets are transmitted through each path.
Data Source
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AI summary
This application provides a data transmission method and apparatus, to reduce wastes of transmission resources. The method includes: receiving, by a first node, a data packet from an air interface, where the first node is a wireless backhaul node, and the wireless backhaul node is configured to provide a wireless backhaul service for a node that wirelessly accesses the wireless backhaul node; duplicating, by the first node, the data packet to obtain M data packets, where M is an integer greater than 1; and splitting, by the first node, the M data packets, and sending the M data packets to a second node through at least two paths. This application relates to the field of communications technologies.