IAB BAP Header Rewriting for Multi-Hop 5G Routing Reliability
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Solution Overview
Problem
The challenge of extending coverage and improving reliability in high-frequency wireless communication systems, particularly in 5G networks, is exacerbated by the limited coverage and poor propagation characteristics of high-frequency carriers, necessitating efficient multi-hop relaying solutions in integrated access and backhaul (IAB) networks.
Innovation Solution
Implementing a network node with a transceiver configured to perform BAP header rewriting based on a header rewriting configuration, and base stations capable of rerouting and rerouting BAP routing IDs, along with inter-topology routing and BAP header rewriting procedures to manage multi-hop connections and ensure reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multi-hop relaying is implemented in IAB networks, then coverage extension is improved, but network complexity increases
Solution Approach 1:
The patent segments the network into IAB nodes that can independently perform BAP header rewriting operations. Each node is divided into functional components (receiver, processor, transmitter) that handle specific tasks in the multi-hop relay process, enabling distributed intelligence that reduces overall network complexity while extending coverage.
Solution Approach 2:
The BAP header rewriting mechanism acts as an intermediary process between different network segments. The header rewriting configuration and processing enable seamless data transmission across multiple hops by mediating the routing decisions and protocol conversions at each IAB node, thereby simplifying the multi-hop relay operation.
2Reliability
If header rewriting configuration is implemented, then routing reliability is improved, but processing complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring header rewriting rules and routing information at IAB nodes before actual data transmission occurs. The header rewriting configuration is established in advance, allowing nodes to simply match and rewrite headers during operation without complex real-time decision-making, thus improving routing reliability while limiting processing complexity to configuration management.
3Reliability
If backup BAP routing IDs are used, then network reliability is improved, but control signaling complexity increases
Solution Approach 1:
The patent uses copying by creating backup BAP routing IDs as copies of the primary routing configuration. These backup routing IDs are pre-established and stored at IAB nodes, allowing for rapid switching to alternative routes during failures without complex control signaling. The backup routing information is copied and cached, enabling simple retrieval and application when needed.
Data Source
AI summary
Embodiments of the present disclosure relate to wireless communication in an integrated access and backhaul (IAB) network. According to some embodiments of the disclosure, a method performed by a network node may include: receiving a header rewriting configuration, wherein each entry of the header rewriting configuration indicates an ingress BAP routing ID, an egress BAP routing ID, and a next hop BAP address for the egress BAP routing ID; and performing a BAP header rewriting procedure based on the header rewriting configuration.