IAB Measurement Report Grouping for Lower Signaling Overhead
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Solution Overview
Problem
The periodic measurement reporting in integrated access and backhaul (IAB) networks leads to increased signaling overhead, particularly when multiple terminals and IAB nodes are connected through multiple hops, which is exacerbated by the mobility of mobile-type IAB nodes installed in vehicles, leading to unnecessary battery consumption and signaling overhead.
Innovation Solution
A method and apparatus for controlling measurement reports by grouping measurement report messages from multiple terminals into a single transmission message based on the IAB type (fixed or mobile), using a dedicated signaling radio bearer (SRB) and adjusting the reporting periodicity accordingly, thereby reducing unnecessary measurements and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic measurement reporting is performed in IAB networks, then measurement accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent combines measurement report messages from multiple terminals into a single grouped message that is transmitted together. This merging approach maintains measurement accuracy by collecting data from all terminals while reducing signaling overhead by transmitting consolidated reports rather than individual terminal reports separately.
Solution Approach 2:
The patent implements periodic grouped measurement reporting where measurements are collected and reported at predetermined intervals. This periodic action ensures continuous monitoring and accurate measurement while managing signaling overhead through scheduled consolidation rather than continuous individual reporting.
2Reliability
If periodic measurement reporting is performed with multiple terminals and IAB nodes, then network monitoring is improved, but battery consumption increases
Solution Approach 1:
By merging measurement reports from multiple terminals into a single grouped message, the system reduces the total number of transmissions required. This decreases the cumulative energy consumption for terminals and IAB nodes while maintaining comprehensive network monitoring through the consolidated report structure.
Solution Approach 2:
The IAB node autonomously groups and consolidates measurement reports from its connected terminals before transmitting to the base station. This self-service mechanism reduces the individual energy burden on each terminal while ensuring complete network monitoring through the IAB node's aggregation function.
3Measurement precision
If measurement reporting is performed in mobile-type IAB networks, then handover decision accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent groups measurement reports from multiple terminals into a single consolidated message that includes all necessary information for handover decisions. This merging approach provides the base station with comprehensive data for accurate handover decisions while reducing the signaling overhead that would result from transmitting separate reports for each terminal.
Data Source
AI summary
A method of an IAB node may comprise: receiving an RRC message including measurement control information from a base station; transmitting RRC reconfiguration information including the measurement control information to each of a plurality of terminals; receiving a measurement report message including a measurement report generated by each of the plurality of terminals based on the measurement control information from each of the plurality of terminals; and grouping the measurement report messages received from the plurality of terminals into a grouped message report message, and transmitting the grouped measurement report message to the base station according to a grouped measurement reporting periodicity.