IAB Donor Local Routing for Lower-Latency Backhaul
Solution Overview
Problem
Existing wireless backhaul networks face challenges in meeting low-latency service requirements due to data transmission modes that require data to pass through multiple hops, making it difficult to efficiently route data packets.
Innovation Solution
Implementing a communication method that establishes local routes between nodes, allowing data packets to be forwarded locally without passing through upper-layer nodes, using a local routing node selected based on topology relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If data is transmitted through multi-hop wireless backhaul nodes to reach the data network, then the network coverage and connectivity are improved, but the communication latency increases
Solution Approach 1:
The patent introduces a local routing node as an intermediary to establish direct local routes between source and destination nodes. This intermediary enables data packets to bypass upper-layer nodes and transmit directly through the local route, reducing the number of hops and communication latency while maintaining network coverage benefits
2Device complexity
If data packets follow traditional routing paths through upper-layer nodes, then the routing structure is simplified and easier to manage, but the transmission efficiency and speed decrease
Solution Approach 1:
The patent segments the routing function into two parts: traditional upper-layer routing for overall network management and local routing for direct data transmission. This segmentation allows data packets to use optimized local routes for faster transmission while the overall routing structure remains manageable through the donor node's control
3Loss of time
If local routes are established between nodes, then the communication latency is reduced and transmission efficiency is improved, but the network complexity and routing management difficulty increase
Solution Approach 1:
The patent implements a feedback mechanism where the donor node receives route establishment requests, determines appropriate local routing nodes, and configures local routes accordingly. This centralized control with feedback ensures that local routes are properly managed and coordinated, preventing network complexity from becoming unmanageable while still achieving reduced latency
Data Source
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AI summary
A communication method is disclosed, including: An integrated access and backhaul IAB donor node receives a first message from a core network network element, where the first message indicates to establish a local route between a first node and a second node, and the first node is an IAB node; and the IAB donor node determines a local routing node based on the first message, where a data packet between the first node and the second node is locally forwarded by using the local routing node. This method can reduce data bypassing and reduce a communication latency.