IAB Hop Multiplexing Scheduling With Pre-Scheduling Coordination
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Solution Overview
Problem
In IAB networks, multiplexing across hops results in unpredictable transmission interference, power distribution, and time-sequence adjustments due to schedulers of different nodes being unaware of each other's scheduling parameters, degrading transmission performance.
Innovation Solution
A multiplexing scheduling method where a first IAB node determines pre-scheduling information with a parent IAB node, using activation signaling to perform multiplexing scheduling between hops, thereby accurately determining interference and power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiplexing scheduling is implemented across hops in IAB network, then spectrum efficiency is improved, but transmission interference becomes unpredictable and scheduling performance degrades
Solution Approach 1:
The patent implements pre-scheduling information determination between hops before actual data transmission. The first IAB node determines pre-scheduling information with its parent IAB node in advance, including resource allocation and multiplexing parameters. This preliminary action allows the scheduler to predict and prepare for potential interference patterns, enabling more reliable transmission while maintaining spectrum efficiency through coordinated resource usage across hops.
2Adaptability or versatility
If different nodes schedule data transmission independently, then node autonomy is maintained, but schedulers cannot predict each other's scheduling parameters leading to degraded performance
Solution Approach 1:
The patent establishes a feedback mechanism where the first IAB node receives activation signaling from its parent IAB node regarding multiplexing scheduling decisions. The scheduler at the first IAB node uses this feedback information to determine pre-scheduling information for subsequent transmissions. This feedback loop enables each node to maintain autonomy while simultaneously improving prediction accuracy of scheduling parameters across hops, resolving the contradiction between node independence and coordinated performance.
3Adaptability or versatility
If multiplexing scheduling is activated based on activation signaling, then adaptive performance of backhaul links is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic activation of multiplexing scheduling through activation signaling between IAB nodes. Rather than permanently configuring complex multiplexing schedules, the system dynamically activates or deactivates multiplexing modes based on current network conditions and traffic requirements. The first IAB node receives activation signaling from its parent node and adapts its pre-scheduling information determination accordingly. This dynamic approach improves adaptive performance while avoiding the overhead of permanently complex scheduling systems.
Data Source
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AI summary
Embodiments of the present invention disclose a multiplexing scheduling method for IAB network and an IAB node. The method includes: determining pre-scheduling information between a first hop and a second hop; receiving activation signaling sent by a second IAB node; and after activating multiplexing scheduling between the first hop and the second hop based on the activation signaling, performing multiplexing scheduling based on the pre-scheduling information, where a first IAB node is used to schedule data transmission on the first hop, and the second IAB node is a parent IAB node of the first IAB node and is used to schedule data transmission on the second hop.