IAB Node Transmission Timing Control for Half-Duplex Efficiency
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Solution Overview
Problem
The low transmission efficiency in Integrated Access and Backhaul (IAB) networks due to half-duplex limitations, where nodes cannot simultaneously transmit and receive data, leading to increased delay and wastage of resources.
Innovation Solution
A method for transmission timing alignment using timing control information to synchronize the reception and transmission of uplink and downlink data across nodes, employing frequency division multiplexing or space division multiplexing to enable simultaneous data reception and transmission, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If half-duplex transmission is used in IAB nodes, then transmission operation and reception operation are separated in time, but transmission efficiency is greatly reduced and resource utilization rate is low
Solution Approach 1:
The patent transitions from time-division multiplexing (1D time separation) to frequency-division multiplexing or spatial-division multiplexing (adding frequency and space dimensions). By using different frequency resources or spatial beams for uplink and downlink transmissions, the IAB node can simultaneously perform transmission and reception operations, resolving the half-duplex limitation and improving transmission efficiency while maintaining control reliability.
2Reliability
If time division duplexing mode is used, then simultaneous transmission and reception are prevented, but transmission delay is greatly increased
Solution Approach 1:
The patent introduces frequency and spatial dimensions to resolve the time-conflict between transmission and reception. By allocating different frequency resources or spatial beams for uplink and downlink, the system enables simultaneous transmission and reception operations, dramatically reducing transmission delay while maintaining control reliability through proper resource management.
3Reliability
If slots are used to stagger transmission and reception, then half-duplex constraint is satisfied, but resources are wasted and utilization rate is low
Solution Approach 1:
The patent moves from time-division resource allocation to frequency-division or spatial-division resource allocation. By using different frequency bands or spatial beams for simultaneous uplink and downlink transmissions, the system eliminates the need for time-staggered slot arrangements, thereby eliminating wasted time resources and improving overall resource utilization while maintaining control reliability.
Data Source
AI summary
Provided are a transmission timing method and apparatus, a base station, and a computer readable storage medium. In the method, a second node issues timing control information to a first node and/or a third node to control alignment of data transmission received by the second node and sent by the first node and data transmission received by the second node and sent by the third node, or to control alignment of data transmission sent by the second node to the first node and data transmission sent by the second node to the third node.