IAB Node Dual Connectivity Resource Allocation
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Solution Overview
Problem
In 5G communication systems, integrated access and backhaul (IAB) nodes face challenges in satisfying the half-duplex constraint during data transmission and reception, particularly when configured for dual connectivity with multiple parent nodes, leading to difficulties in managing resource allocation and scheduling effectively.
Innovation Solution
The method involves configuring IAB nodes to perform frequency division multiplexing (FDM) and/or space division multiplexing (SDM) on backhaul and access data, allowing for simultaneous data transmission and reception while adhering to the half-duplex constraint by allocating specific time and frequency resources, and using flexible resource types to manage conflicts between parent and child nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If IAB node performs dual connectivity with multiple parent nodes, then data transmission capacity is improved, but half-duplex constraint satisfaction becomes difficult
Solution Approach 1:
The patent segments the backhaul and access data transmissions into separate time slots and frequency resources. By dividing the resource allocation into distinct segments for different data types and directions, the IAB node can manage dual connectivity with multiple parent nodes while maintaining half-duplex operation through structured resource separation.
Solution Approach 2:
The patent introduces frequency division multiplexing as an additional dimension for resource allocation. By allocating specific frequency resources for backhaul data and access data, the system resolves the half-duplex conflict without limiting the dual connectivity capability, effectively adding a frequency dimension to the resource management space.
2Productivity
If frequency division multiplexing is used for backhaul and access data, then simultaneous transmission and reception is enabled, but resource allocation complexity increases
Solution Approach 1:
The patent creates a universal resource allocation framework that handles multiple data types (backhaul and access) and multiple directions (transmission and reception) through a unified frequency-division approach. This multi-functional resource management system can accommodate dual connectivity with different parent nodes while maintaining systematic control through standardized allocation procedures.
3Speed
If dual connectivity is configured with multiple parent nodes, then data transmission rate is improved, but resource scheduling management becomes difficult
Solution Approach 1:
The patent applies local quality by assigning specific frequency resources and time slots tailored to each parent node connection and data type. Rather than uniform resource allocation, the system customizes resource characteristics for different backhaul and access data flows, enabling efficient dual connectivity management while maintaining operational simplicity through localized resource optimization.
Data Source
AI summary
The present disclosure provides a method, performed by an integrated access and backhaul (IAB) node, of transmitting and receiving data in a wireless communication system. The method may include: receiving resource allocation information from an IAB donor node, receiving first resource scheduling information from a first parent IAB node, receiving second resource scheduling information from a second parent IAB node, transmitting and receiving data to and from at least one of the first parent IAB node, the second parent IAB node, a child IAB node, or a user equipment (UE), based on the resource allocation information, the first resource scheduling information and the second resource scheduling information.