Assistant Information Reporting for IAB Link Reestablishment
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Solution Overview
Problem
The backhaul link in wireless communication systems can fail due to various factors such as blockage by objects or foliage, leading to disruptions in data or signal transmission, particularly in multi-hop relay networks where link switching techniques are necessary to maintain connectivity.
Innovation Solution
The method involves transmitting and receiving assistant information for reestablishing links between access nodes and integrated access and backhaul nodes, utilizing F1 signaling to facilitate handover and reestablishment procedures, ensuring seamless data transmission by providing UE context and cell identity information to target base stations during handover processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay nodes are deployed to extend coverage, then network coverage is improved, but link reliability deteriorates due to potential backhaul link failures
Solution Approach 1:
The patent applies preliminary action by having the source base station transmit assistant information about alternative target base stations to the relay node before the backhaul link actually fails. This allows the relay node to have pre-configured backup options ready, enabling faster recovery when link failure occurs, thus maintaining reliability while preserving extended coverage through relay nodes
2Reliability
If link switching is implemented to maintain connectivity, then service continuity is improved, but handover complexity increases
Solution Approach 1:
The patent uses the source base station as an intermediary to facilitate the handover process. Instead of the relay node directly managing complex target base station selection and handover procedures, the source base station acts as a mediator by providing assistant information about suitable target base stations, thereby simplifying the relay node's task while ensuring service continuity through coordinated handover
3Productivity
If assistant information is transmitted via F1 signaling, then handover efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential assistant information needed for handover (such as target base station identifiers and configuration parameters) and transmits it via F1 signaling, rather than transferring complete base station configurations or unnecessary data. This selective extraction approach improves handover efficiency by providing necessary information quickly while minimizing signaling overhead by excluding redundant information
Data Source
AI summary
The present disclosure relates to methods and apparatuses. According to some embodiments of the disclosure, a method includes: receiving at a base station, assistant information for reestablishing a link for at least one access node associated with an integrated access and backhaul node.