IAB Node Configuration for Downlink Routing and QoS
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Solution Overview
Problem
In Integrated Access and Backhaul (IAB) scenarios, the existing technologies lack clear definitions for nodes participating in data forwarding and adaptation information configuration for downlink data packets, particularly in routing and quality of service (QoS) mapping, which hinders efficient data transmission in 5G mobile communications systems.
Innovation Solution
A configuration method and apparatus that receive and send configuration information, including routing and QoS configurations, between radio access network (RAN) devices and wireless backhaul nodes to ensure correct data forwarding and transmission path management, enabling accurate routing and quality of service management for data packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adaptation information is added by IAB node for uplink data packets, then routing capability is improved, but for downlink data packets the node configuration and information acquisition method is undefined
Solution Approach 1:
The patent applies inversion by reversing the traditional uplink-only adaptation information addition approach. Instead of only the IAB node adding adaptation information for uplink packets, the donor gNodeB now also adds adaptation information for downlink packets, creating a bidirectional symmetric mechanism that resolves the undefined configuration problem for downlink data transmission.
2Productivity
If high frequency carriers are used to meet ultra-high capacity requirement, then capacity is improved, but propagation feature deteriorates and coverage becomes small
Solution Approach 1:
The patent applies segmentation by dividing the network into densely deployed small cells using high frequency carriers to achieve ultra-high capacity in hotspot areas, while using IAB nodes with wireless backhaul to extend coverage to remote areas without requiring fiber deployment, thus segmenting the network into capacity-focused and coverage-focused zones.
Solution Approach 2:
The patent uses IAB nodes as intermediaries that provide wireless backhaul connectivity to remote areas where fiber deployment is difficult and costly. These intermediary nodes enable network extension to coverage-challenged regions while maintaining the high capacity benefits of high frequency carriers in served areas.
3Productivity
If large quantity of small cells are densely deployed to meet ultra-high capacity requirement, then capacity is improved, but deployment cost increases and fiber backhaul becomes difficult
Solution Approach 1:
The patent replaces the mechanical fiber backhaul system with wireless backhaul technology. Instead of physically deploying fiber cables to each densely deployed small cell, the system uses wireless communication links through IAB nodes to provide backhaul connectivity, significantly reducing deployment complexity and cost while maintaining high capacity support.
Data Source
AI summary
This application provides wireless communications configuration methods and apparatuses. One method includes: receiving a routing configuration of a transmission path for a layer of the network device, wherein the routing configuration comprises an identifier of a first wireless backhaul node, the network device is a distributed unit (DU) of the donor node or a second wireless backhaul node connected to the DU, the CU and at least one wireless backhaul node is on the transmission path, and wherein the layer of the network device is capable of mapping, on a backhaul link based on identification information related to quality of service (QoS) requirement comprised in a data packet, the data packet to a radio link control (RLC) channel on a backhaul link for sending the data packet to a next-hop node of the network device on the transmission path; and performing the routing configuration on the layer.