IAB Soft Resource Availability in M-TRP Backhaul Coordination
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Solution Overview
Problem
In multi-DCI based multi-TRP operations, there are conflicts in soft resource availability indications at the IAB-DU due to independent DCI from multiple TRPs, leading to collisions and scheduling issues for IAB-MT.
Innovation Solution
Implement conflict resolution measures and predefined time offsets to coordinate soft resource availability indications across multiple TRPs, ensuring consistent and non-conflicting usage of resources at the IAB-DU, using methods like dynamic coordination and search space associations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If independent DCI from multiple TRPs are used for scheduling, then scheduling flexibility and resource utilization are improved, but conflicts in soft resource availability indications occur leading to collisions and scheduling issues
Solution Approach 1:
The patent segments the soft resource availability indication process by introducing TRP-specific indication fields in DCI formats. Each TRP can independently indicate soft resource availability for its scheduled resources, allowing separate control and avoiding conflicts between multiple TRPs. This segmentation enables each TRP to manage its own resource indications without interfering with other TRPs, thus maintaining scheduling flexibility while ensuring resource availability consistency.
Solution Approach 2:
The patent introduces an intermediary mechanism through higher-layer configuration parameters that mediate between multiple TRPs' scheduling decisions. The network configures TRP-specific indication fields and association rules that act as intermediaries to coordinate resource availability indications across multiple TRPs, preventing collisions while preserving the independence of each TRP's scheduling flexibility.
2Adaptability or versatility
If soft resource availability indications are monitored from multiple parents, then resource allocation flexibility is improved, but conflict resolution complexity increases
Solution Approach 1:
The patent applies local quality by making soft resource availability indications TRP-specific rather than global. Each TRP's DCI includes indication fields that are locally valid for that TRP's scheduled resources. This allows the IAB-MT to handle multiple parent indications independently for each TRP, maintaining resource allocation flexibility while reducing conflict resolution complexity by localizing the indication scope to each TRP.
Solution Approach 2:
The patent adds a new dimension to resource availability indication by introducing TRP-specific indication fields within the DCI structure. This dimensional change allows the system to track soft resource availability separately for each TRP, enabling flexible resource allocation across multiple parents while simplifying conflict resolution through structured, dimension-separated indication management.
3Productivity
If dynamic coordination between TRPs is implemented, then resource utilization efficiency is improved, but signaling overhead and coordination latency increase
Solution Approach 1:
The patent implements preliminary action by pre-configuring TRP-specific indication field structures and association rules through higher-layer signaling before dynamic coordination is needed. This preliminary setup establishes the framework for efficient TRP coordination, allowing dynamic resource availability indication to proceed with minimal real-time processing delay, thus improving resource utilization efficiency while minimizing coordination latency.
Data Source
AI summary
In accordance with example embodiments of the disclosure there is at least a method and apparatus to perform receiving from a network node, by a network device of a communication network, information including a configuration for monitoring an indication of soft symbol availability from a communication network that uses at least one parent node to support the network device; based on the configuration, determining by the network device to monitor the indication of soft symbol availability from the at least one parent, wherein the determining is based on the indication of soft symbol availability being from one parent or more than one parent of the at least one parent; and based on the determining, performing measures by the network device before applying indicated changes for a usage of the soft symbol at the network device. Further, to perform determining, by a network node of a communication network, information for a network device including a configuration for monitoring an indication of soft symbol availability from a communication network that uses at least one parent node to support the network device; and based on the determining, sending the information towards the network device, wherein the information is to cause network device to perform measures comprising monitoring the indication of soft symbol availability from the at least one parent and applying indicated changes for a usage of the soft symbol based on the indication of soft symbol availability being from one parent or more than one parent.