Full-Duplex IAB Data Transfer for Self-Interference-Aware Allocation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing concurrent transmission and reception in integrated access and backhaul (IAB) systems, particularly with dynamic traffic changes, leading to issues with latency, reliability, and throughput.
Innovation Solution
Implementing full-duplex (FD) technology in IAB nodes to enable concurrent transmission and reception, with techniques for determining optimal resource allocations and transmit power management to handle dynamic traffic, including self-interference control and modulation schemes based on feedback information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If half-duplex mode is used in IAB nodes, then self-interference is avoided, but system capacity and throughput are limited due to inability to transmit and receive concurrently
Solution Approach 1:
The patent converts the harmful self-interference signal into a beneficial resource by implementing full-duplex operation. The IAB node transmits and receives signals simultaneously on the same frequency resource, using the received signal to estimate channel state information for precoding, thereby transforming the previously harmful self-interference into a useful feedback mechanism for improving transmission quality.
Solution Approach 2:
The patent changes the operational parameter from half-duplex to full-duplex mode, enabling simultaneous transmission and reception. This parameter change allows the system to double the effective capacity by utilizing both time slots for productive communication rather than alternating between transmit and receive modes.
2Productivity
If full-duplex mode is implemented without precise power control, then system capacity increases, but interference with parent node reception deteriorates reliability
Solution Approach 1:
The patent implements a feedback mechanism where the IAB node reports its transmit power level to the parent node. Based on this feedback, the parent node adjusts its reception parameters and scheduling decisions. This closed-loop feedback system enables the system to maintain high throughput from full-duplex operation while ensuring reception quality remains acceptable through adaptive power management.
Solution Approach 2:
The patent introduces dynamic power adjustment capabilities where transmit power levels can be changed based on real-time channel conditions and traffic requirements. The system dynamically allocates power resources to balance between maximizing throughput and minimizing interference to the parent node, adapting to varying network conditions rather than using fixed power levels.
3Adaptability or versatility
If resources are allocated without considering FD mode, then allocation simplicity is maintained, but adaptability to dynamic traffic changes is reduced
Solution Approach 1:
The patent segments the resource allocation process into separate handling for FD and non-FD modes. The gNodeB maintains separate allocation logic that identifies which resources should be allocated in FD mode based on traffic characteristics and channel conditions. This segmentation allows the system to handle the complexity of FD allocation systematically rather than attempting to manage all resources uniformly.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an integrated access and backhaul (IAB) node may transmit, to a parent node of the IAB node, full-duplex (FD) information based at least in part on a transmit power value for an FD mode. The IAB node may receive an FD resource allocation for the IAB node, wherein the FD resource allocation identifies a resource to be used for a first communication link with the parent node and a second communication link in the FD mode, and wherein the FD resource allocation is based at least in part on the FD information. The IAB node may communicate on the first communication link and the second communication link in accordance with the FD resource allocation. Numerous other aspects are provided.