Inter-DU CLI Measurement Reuse in IAB Nodes
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively measuring and mitigating inter-distributed unit (inter-DU) crosslink interference (CLI), which can lead to reception issues, reliability problems, and increased retransmissions due to overlapping communications between neighboring base station DUs.
Innovation Solution
The method involves configuring an indication of capability to reuse measurements or transmissions associated with a mobile terminal (MT) of one IAB node as CLI measurements for another IAB node, and transmitting this indication to a central unit (CU) of an IAB donor, allowing for the reuse of MT measurements or transmissions for inter-DU CLI measurement, thereby reducing resource consumption and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate CLI measurements are performed for each DU, then measurement accuracy is improved, but resource consumption and system complexity increase
Solution Approach 1:
The patent enables MT measurements to serve dual purposes: traditional mobility management and inter-DU CLI measurement. By configuring the MT to perform measurements that can be reused by multiple DUs, the system achieves accurate CLI measurement without requiring separate dedicated measurement mechanisms for each DU, thus reducing overall system complexity while maintaining measurement precision.
Solution Approach 2:
The patent combines CLI measurement functionality with existing MT measurement capabilities. Instead of implementing separate measurement systems for each DU, the measurement functions are merged and shared across multiple DUs through the common MT, reducing redundant operations and simplifying the measurement architecture while maintaining accurate inter-DU interference measurement.
2Reliability
If dedicated CLI measurement resources are allocated for each DU, then measurement reliability is improved, but resource consumption increases
Solution Approach 1:
The patent makes radio resources universal by enabling the same MT measurement resources to be shared and reused by multiple DUs for their respective CLI measurements. This eliminates the need for each DU to have dedicated measurement resources, reducing overall resource consumption while maintaining reliable measurement capability through the shared universal resource pool.
Solution Approach 2:
The patent recovers and reuses MT measurement results for multiple DU CLI measurement purposes. Instead of discarding measurement results after a single use, the system recovers and applies the same measurements across multiple DUs, maximizing resource utilization efficiency and reducing the total quantity of radio resources needed for reliable CLI measurement.
3Measurement precision
If independent CLI measurement procedures are used for each DU, then measurement accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements universal measurement procedures where the MT performs measurements once that serve multiple DUs simultaneously. This eliminates redundant measurement operations that would otherwise consume additional power, while still achieving accurate inter-DU CLI measurement through the shared measurement results, thereby reducing overall power consumption without sacrificing measurement precision.
Solution Approach 2:
The patent merges independent DU measurement procedures into a unified shared measurement approach. By combining the measurement operations at the MT level and sharing results across multiple DUs, the system eliminates duplicate power-consuming operations while maintaining the ability to accurately measure inter-DU CLI through the consolidated measurement process.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a distributed unit (DU) of a first integrated access and backhaul (IAB) node may configure an indication of a capability to reuse measurements, associated with a mobile terminal of the first IAB node, as crosslink interference measurements for a DU of a second IAB node. The DU may transmit the indication to a central unit of an IAB donor. Numerous other aspects are provided.