Dual-Connectivity IAB Node Scheduling Under Half-Duplex Constraints
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Solution Overview
Problem
Existing IAB communication systems face challenges in satisfying half-duplex constraints when an IAB node is set up for dual connectivity to multiple parent nodes, complicating data transmission and reception between distributed units and access user equipment.
Innovation Solution
The method involves an IAB node receiving resource allocation and scheduling information from multiple parent nodes, allowing it to transmit or receive data based on these allocations and schedules, thereby managing half-duplex constraints in mixed data transmission environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an IAB node is set up for dual connectivity to multiple parent nodes, then network service area expansion and service capability are improved, but half-duplex constraint satisfaction becomes difficult and data transmission complexity increases
Solution Approach 1:
The IAB node segments its operation into distinct time resources: first time resources for communicating with the first parent node, and second time resources for communicating with the second parent node. This temporal segmentation allows the node to handle dual connectivity operations without simultaneous transmission conflicts, thereby managing the complexity of multi-parent communication while maintaining service capability.
2Adaptability or versatility
If an IAB node is set up for dual connectivity to multiple parent nodes, then network service area expansion is improved, but half-duplex constraint satisfaction deteriorates
Solution Approach 1:
The IAB node dynamically allocates its transmission and reception operations across different time resources depending on which parent node it is communicating with. The node adapts its operational state (transmitting to first parent, receiving from second parent, or vice versa) based on the scheduled time resources, ensuring half-duplex constraints are satisfied while maintaining dual connectivity for network expansion.
3Adaptability or versatility
If resource allocation information is received from multiple parent nodes, then data transmission flexibility is improved, but scheduling coordination difficulty increases
Solution Approach 1:
The IAB node receives and stores resource allocation information from both parent nodes in advance, before actual data transmission occurs. This preliminary action allows the node to pre-coordinate its transmission and reception schedules, ensuring that it can flexibly allocate resources while avoiding conflicts between dual connectivity operations.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Provided is a method of transmitting or receiving data by an integrated access and backhaul (IAB) node in a wireless communication system. The method includes receiving resource allocation information from at least one of a first parent IAB node or a second parent IAB node, with the IAB node having dual connectivity to the at least one of a first parent IAB node and the second parent IAB node, receiving information about first resource scheduling from the first parent IAB node, receiving information about second resource scheduling from the second parent IAB node, and transmitting or receiving data based on the resource allocation information, the information about the first resource scheduling, the information about the second resource scheduling, and a link over the first resource scheduling and the second resource scheduling.