IAB Node Resource Allocation via DU-MT Segmentation
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Solution Overview
Problem
In integrated access and backhaul (IAB) nodes, the transmission and reception directions of the distributed unit (DU) and mobile termination (MT) often do not coincide, leading to operational challenges due to unidirectional transmission and reception characteristics, which can result in delays and inefficiencies.
Innovation Solution
A method and apparatus for IAB nodes that include a DU and an MT, where the DU receives resource allocation messages from a central unit (CU) and identifies whether transmission or reception is scheduled, allowing it to perform the corresponding operation using allocated resources, thereby aligning operations with unidirectional characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the DU and MT operate with bidirectional transmission and reception simultaneously, then resource utilization efficiency is improved, but transmission reliability deteriorates due to unidirectional characteristics constraints
Solution Approach 1:
The IAB node is segmented into two functional entities: the Distributed Unit (DU) for access network functions and the Mobile Termination (MT) for backhaul network functions. This segmentation allows independent control and operation of each function, enabling the DU to operate in one direction (e.g., transmission) while the MT operates in the opposite direction (e.g., reception), thus resolving the contradiction between resource utilization and transmission reliability by accommodating unidirectional characteristics.
2Adaptability or versatility
If resource allocation does not consider unidirectional transmission characteristics, then resource allocation flexibility is improved, but operational conflicts increase between DU and MT
Solution Approach 1:
The CU receives feedback information from the IAB node about the operational states of both DU and MT, including their transmission/reception directions. Based on this feedback, the CU dynamically adjusts resource allocation to ensure that when DU is transmitting, MT is receiving, and vice versa. This feedback mechanism maintains resource allocation flexibility while preventing operational conflicts by adapting to the unidirectional characteristics of each function.
Data Source
AI summary
The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation system with a technology for Internet of Things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure discloses a method and an apparatus for allocating resources of an IAB node.