Multi-Hop IAB Multicast Forwarding for Poor Link Conditions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multi-hop IAB scenarios, service transmission performance is limited by the link with the worst signal quality, and moving IAB nodes exacerbate signal attenuation, leading to inefficient data packet transmission.
Innovation Solution
Implementing multicast transmission in IAB networks by a first IAB node to send data packets to multiple next-hop nodes, ensuring transmission even if one link quality is poor, and switching to unicast when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unicast transmission is used in multi-hop IAB scenarios, then transmission path is simple, but transmission reliability deteriorates when link quality is poor
Solution Approach 1:
The patent implements dynamic transmission mode selection that adapts between unicast and multicast based on real-time link quality assessment. The IAB node evaluates signal conditions and automatically switches transmission modes to optimize reliability while managing complexity through adaptive control mechanisms.
Solution Approach 2:
The patent changes the transmission parameter from unicast to multicast mode based on link quality conditions. When link quality falls below a threshold, the system transitions to multicast transmission to improve reliability, demonstrating parameter adaptation based on environmental conditions.
2Reliability
If multicast transmission is used to improve reliability, then transmission reliability improves, but device complexity increases
Solution Approach 1:
The system employs dynamic mode selection that activates multicast only when necessary based on link quality assessment. This reduces average complexity by maintaining simple unicast operation during good conditions while providing reliable multicast transmission only when quality degradation is detected.
Solution Approach 2:
The transmission mode parameter is dynamically changed from unicast to multicast based on link quality thresholds. This selective parameter change ensures reliability improvement is achieved only when needed, avoiding unnecessary complexity during normal operating conditions.
3Productivity
If single path forwarding is used, then device complexity is low, but transmission efficiency deteriorates when intermediate links have poor signal quality
Solution Approach 1:
The patent implements dynamic path selection that switches between single-path and multi-path forwarding based on link quality monitoring. When intermediate link quality deteriorates, the system dynamically activates alternative paths through multicast, improving efficiency while maintaining simple operation during good conditions.
4Adaptability or versatility
If IAB node moves, then network flexibility improves, but signal attenuation increases severely
Solution Approach 1:
The system dynamically adapts transmission mode in response to IAB node movement and resulting signal changes. When movement causes signal attenuation below thresholds, the system automatically switches to multicast mode to maintain reliability, enabling flexible node deployment without sacrificing communication quality.
Data Source
AI summary
Embodiments of this application provide a data transmission method, which may be applied to a multi-hop IAB scenario. The method includes: A first IAB node receives a first data packet; and the first IAB node sends a second data packet to a plurality of second IAB nodes through multicast, where the second data packet is determined based on the first data packet, and the plurality of second IAB nodes are next-hop nodes of the first IAB node. According to this application, after the first IAB node receives a data packet, if a next node of the first IAB node includes a plurality of second IAB nodes, the first IAB node may send a data packet to the plurality of second IAB nodes through multicast, to implement multicast transmission in a multi-hop IAB scenario.