IAB Node Uplink Downlink Conflict Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current integrated access and backhaul (IAB) multi-parent uplink-downlink alignment technologies face challenges in coordinating transmission directions between multiple parent nodes, leading to conflicts and inefficiencies in resource utilization, particularly in inter-donor multi-parent scenarios where semi-static and dynamic resource configurations can result in transmission direction collisions.
Innovation Solution
The proposed solution involves a network node that connects to multiple parent IAB nodes, obtaining and coordinating semi-static and dynamic resource indications, prioritizing resource configurations, and communicating with parent nodes to align uplink/downlink directions, ensuring compatible resource configurations are shared among parent nodes to prevent conflicts and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If semi-static and dynamic resource configurations are used in inter-donor multi-parent scenarios, then resource utilization flexibility is improved, but transmission direction collisions and conflicts occur
Solution Approach 1:
The network node obtains semi-static resource configurations from multiple parent nodes in advance before actual transmission occurs. This preliminary configuration allows the node to proactively identify and resolve potential transmission direction conflicts before they manifest, ensuring reliable operation while maintaining resource flexibility.
Solution Approach 2:
The network node continuously monitors and coordinates resource indications from multiple parent nodes, using feedback mechanisms to detect transmission direction conflicts and adjust configurations dynamically. This feedback loop ensures that resource utilization remains flexible while preventing transmission direction collisions through real-time coordination.
2Reliability
If multiple parent nodes are connected to an IAB node, then route redundancy and load balancing capability are improved, but resource coordination complexity increases
Solution Approach 1:
The network node merges and coordinates resource indications from multiple parent nodes through a unified resource coordination mechanism. By consolidating the management of semi-static and dynamic resource configurations in a single node, the system maintains route redundancy and load balancing capability while reducing the overall coordination complexity that would otherwise be distributed across multiple nodes.
Solution Approach 2:
The network node acts as an intermediary between multiple parent nodes, receiving and harmonizing resource configurations from different donors. This intermediary role simplifies the coordination complexity by providing a centralized point of management, while still enabling the route redundancy and load balancing benefits of multi-parent connectivity.
3Reliability
If transmission direction alignment is implemented between multiple parent nodes, then transmission reliability is improved, but resource configuration coordination overhead increases
Solution Approach 1:
Transmission direction alignment is established through preliminary semi-static resource configurations obtained in advance from parent nodes. By pre-coordinating transmission directions before actual data transmission, the system ensures high transmission reliability while minimizing the time and overhead required for coordination during active transmission periods.
Data Source
AI summary
According to some embodiments, a method is performed by an integrated access and backhaul (IAB) node in dual connectivity where an IAB-MT is connected to two IAB parents and two IAB donors. The method comprises: obtaining (1212) a semi-static flexible resource configuration from an IAB donor; obtaining (1214) a first uplink/downlink resource indication for a semi-statically configured flexible resource from a first IAB parent and a second uplink/downlink resource indication from a second IAB parent; obtaining (1216) a priority associated with the first IAB parent and a priority associated with the second IAB parent; determining (1218) the first and second uplink/downlink resource indications conflict; selecting (1220) one of the first and second uplink/downlink resource indications based on the priority associated with the first and second IAB parents; and communicating (1222) with the two IAB parents according to the selected uplink/downlink resource indication.