Dynamic Guard Symbol Allocation in IAB Network Transitions
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Solution Overview
Problem
Current integrated access and backhaul (IAB) networks face challenges in efficiently managing transitions between mobile termination (MT) and distributed unit (DU) resources, particularly in providing guard symbols during these transitions, which can lead to resource conflicts and interference.
Innovation Solution
The implementation of a method where IAB nodes receive parent knowledge messages indicating the receipt of optional signaling messages, allowing them to determine the number of guard symbols to provide based on these messages, thereby optimizing resource usage and minimizing interference during transitions between MT and DU operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guard symbols are provided during transitions between MT and DU resources, then interference is reduced and resource conflicts are minimized, but resource utilization efficiency deteriorates due to additional overhead symbols
Solution Approach 1:
The patent implements dynamic guard symbol adjustment where the number of guard symbols is not fixed but adapts based on transition conditions. The IAB node determines the number of guard symbols to provide based on whether the parent IAB node has received optional signaling messages, making the guard symbol allocation flexible and condition-dependent rather than static
Solution Approach 2:
The patent changes the parameter of guard symbol count based on signaling message reception status. When the parent knowledge message indicates the parent IAB node has received optional signaling messages, a different number of guard symbols is provided compared to when it has not, thereby optimizing the balance between reliability and resource efficiency through parameter adjustment
2Reliability
If the number of guard symbols is increased to ensure proper transition timing, then transition reliability is improved, but available resources for data transmission are reduced
Solution Approach 1:
The patent applies partial action by providing guard symbols only when necessary based on signaling message reception. Instead of always providing maximum guard symbols, the system provides a partial number of guard symbols conditioned on the parent knowledge message status, thereby maintaining sufficient transition reliability while preserving more resources for data transmission
3Measurement precision
If optional signaling messages are implemented to provide transition information, then resource allocation accuracy is improved, but system complexity increases due to additional signaling overhead
Solution Approach 1:
The patent introduces an intermediary mechanism through optional signaling messages and parent knowledge messages that facilitate accurate transition information exchange between IAB nodes. These signaling messages act as intermediaries that carry transition status information, enabling precise resource allocation while maintaining a relatively simple processing framework through standardized message formats
Data Source
AI summary
An integrated access and backhaul (IAB) node may receive a parent knowledge message, the parent knowledge message indicating whether a parent IAB node of the child IAB node has received an optional signaling message, determining to transition between first resources and second resources at a transition time, the first resources being associated with use of a mobile termination of the child IAB node, the second resources being associated with use of the distributed unit of the child IAB node, and determine a number of guard symbols provided by the parent IAB node at the transition time based on whether the parent knowledge message indicates that the parent IAB node has received the optional signaling message.