IAB Node Routing Table Updates for mmWave Blocking and Interference
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing routing table updates in integrated access and backhaul (IAB) nodes, particularly in mmWave spectrum, due to severe short-term blocking and interference, which traditional RRC-based handover mechanisms cannot effectively mitigate.
Innovation Solution
A method and apparatus for updating routing tables in IAB nodes, where a first node transmits messages to a second node for modifying routing paths, utilizing hop-by-hop and end-to-end signaling mechanisms to reduce signaling overhead and improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional RRC-based handover mechanisms are used for routing table updates in IAB nodes, then the routing management can be maintained with existing protocols, but severe short-term blocking and interference in mmWave spectrum cannot be effectively mitigated
Solution Approach 1:
The patent changes the signaling mechanism from traditional RRC-based handover to a simplified routing update procedure using F1AP messages. This parameter change in the communication protocol enables faster routing table updates that can respond to short-term blocking and interference in mmWave spectrum, improving reliability without being constrained by legacy protocol limitations
2Productivity
If hop-by-hop and end-to-end signaling mechanisms are implemented for routing table updates, then signaling overhead is reduced and efficiency is improved, but the system complexity increases
Solution Approach 1:
The patent segments the routing update signaling into two distinct mechanisms: hop-by-hop signaling for immediate local routing updates and end-to-end signaling for coordinated network-wide updates. This segmentation allows the system to choose the appropriate signaling mode based on the update scenario, improving efficiency while managing complexity through modular design
Solution Approach 2:
The patent implements partial signaling by allowing routing updates to be performed selectively - hop-by-hop when local changes are needed, or end-to-end when coordinated updates are required. This partial action approach reduces overall signaling overhead compared to requiring full end-to-end signaling for all updates, thereby improving productivity without unnecessarily increasing system complexity
Data Source
AI summary
A method and apparatus are disclosed from the perspective of a first node supporting wireless access and wireless backhaul. In one embodiment, the method includes the first node transmitting a first message to a second node, for updating a second routing path maintained by the second node.