Wireless Backhaul Node Identification for IAB Routing Efficiency
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Solution Overview
Problem
In IAB networks, existing methods fail to effectively manage identifiers for IAB nodes, leading to inefficiencies in routing and data transmission due to the inability of C-RNTI to uniquely identify nodes across the service range of a donor node.
Innovation Solution
A donor node allocates a unique identifier, such as an adaptation layer identifier, to IAB nodes to ensure they can be uniquely identified on wireless backhaul links within its service range, and this identifier is managed and updated during topology changes or handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If C-RNTI is used to identify IAB node, then identification is simple within cell, but identification cannot be used on wireless backhaul link within donor node service range
Solution Approach 1:
The identifier is segmented into two parts: donor node identifier and IAB node identifier. This segmentation allows the identifier to function both within the cell (using IAB node identifier) and on the wireless backhaul link (using combined donor node + IAB node identifier), resolving the contradiction between simplicity and versatility.
Solution Approach 2:
The IAB node identifier is nested within the combined identifier structure along with the donor node identifier. This nesting allows the identifier to maintain hierarchy while expanding its适用范围 from cell-level to network-level identification, solving the versatility problem while keeping the structure organized.
2Productivity
If route selection is performed based on routing information in data packet, then data transmission can be forwarded, but routing overheads increase
Solution Approach 1:
The routing function is extracted from the data packet payload and embedded into the identifier structure itself. The identifier carries routing information inherently, eliminating the need for separate routing headers or extensive routing tables, thus reducing routing overhead while maintaining transmission efficiency.
Solution Approach 2:
The identifier is designed to serve multiple functions: node identification, routing information carrier, and path determination. This multi-functionality eliminates the need for separate routing mechanisms, reducing overall routing overhead while maintaining data transmission efficiency.
Data Source
AI summary
Examples in this application provide an identifier management method and apparatus. One example method includes receiving, by a first donor node, first indication information sent by a first node, where the first indication information indicates that the first node can be configured to provide a wireless backhaul service, and sending, by the first donor node to the first node, a first identifier, where the first identifier uniquely identifies the first node on a wireless backhaul link within a service range of the first donor node.