IAB Node Signaling Mapping for Backhaul Reliability
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Solution Overview
Problem
Current 5G mobile communications technologies do not effectively distinguish and prioritize different types of signaling messages on backhaul links, leading to potential errors and network performance issues due to low-priority signaling being processed before high-priority signaling.
Innovation Solution
A method that maps different types of signaling messages to specific transmission channels based on their priority, using indication information to differentiate between signaling types such as F1AP messages related to access terminals or not, ensuring higher-priority messages are transmitted preferentially.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different signaling messages are transmitted on the same backhaul link without distinction, then the backhaul link can support multiple signaling types, but low-priority signaling may be processed before high-priority signaling causing errors and network performance degradation
Solution Approach 1:
The patent segments the backhaul link transmission by creating separate logical channels (first logical channel and second logical channel) for different signaling message types. The IAB donor DU divides the transmission task by routing F1AP messages through one logical channel and RRC messages through another, ensuring that high-priority and low-priority signaling are handled separately to prevent processing errors.
2Reliability
If signaling messages are mapped to different transmission channels based on priority, then high-priority signaling can be transmitted preferentially, but the system requires additional indication information and mapping mechanisms
Solution Approach 1:
The patent applies preliminary action by establishing the mapping relationship between signaling message types and logical channels in advance. The IAB donor CU sends indication information to the IAB donor DU beforehand, specifying which logical channel should be used for each signaling message type. This pre-configuration allows the system to prioritize high-priority signaling without requiring complex real-time decision-making mechanisms.
Data Source
AI summary
Example mapping methods and apparatus are described. One example method includes determining a message type of an uplink signaling message by an integrated access and backhaul node. The integrated access and backhaul node maps the uplink signaling message to a corresponding backhaul radio link control (BH RLC) based on an uplink mapping relationship from an integrated access and backhaul donor centralized unit and the message type. The uplink signaling message is sent to a parent node of the integrated access and backhaul node.