Adaptive NB-IoT Measurement Procedure for Operational Modes
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Solution Overview
Problem
Existing measurement procedures for Narrowband Internet of Things (NB-IoT) devices face challenges due to reduced UE bandwidth, impacting measurement accuracy and time/rate, especially in varying operational modes such as stand-alone, guard-band, and in-band operations.
Innovation Solution
Adapting measurement procedures based on the operational mode of the cell, including adjusting measurement time, sampling frequency, and cell selection/reselection parameters to optimize performance in different signal transmission configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If measurement procedures are performed using reduced UE bandwidth in NB-IoT, then device complexity and power consumption are reduced, but measurement accuracy and measurement time are degraded
Solution Approach 1:
The patent applies dynamics by making the measurement procedure adaptive to different operational modes (stand-alone, guard-band, in-band). The UE dynamically selects measurement parameters including bandwidth, time resources, and reference signals based on the detected operational mode, allowing the measurement system to optimize between complexity and accuracy for each specific deployment scenario
Solution Approach 2:
The patent changes measurement parameters based on operational mode. Different bandwidth configurations, time resource allocations, and reference signal types are applied depending on whether the cell operates in stand-alone, guard-band, or in-band mode. This parameter adaptation resolves the contradiction by tailoring measurement resources to the specific operational context
2Device complexity
If measurement procedures are performed using reduced UE bandwidth in NB-IoT, then device complexity and power consumption are reduced, but measurement time is increased
Solution Approach 1:
The patent makes measurement time dynamic by adapting it to the operational mode. In stand-alone mode with dedicated resources, measurement time can be shorter. In guard-band and in-band modes where resources are shared or more limited, the UE adjusts measurement time accordingly. This dynamic adaptation resolves the time-complexity trade-off
Solution Approach 2:
The patent applies preliminary action by having the UE first determine the operational mode of the target cell before initiating measurements. This preliminary identification allows the UE to pre-configure appropriate measurement parameters including time resources, avoiding wasted measurement attempts with suboptimal parameters and reducing overall measurement time
3Measurement precision
If adaptive measurement procedures are implemented for different operational modes, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the measurement procedure into distinct paths for different operational modes. Instead of a single complex adaptive algorithm, the UE follows mode-specific measurement procedures: stand-alone mode uses dedicated NB-IoT resources, guard-band mode uses LTE carrier resources, and in-band mode uses shared resources. This segmentation reduces complexity by providing clear, mode-specific guidance rather than requiring complex real-time adaptation logic
Solution Approach 2:
The patent applies self-service by having the UE autonomously determine its own operational mode and select appropriate measurement parameters without requiring complex network configuration or external assistance. The UE uses pre-defined rules and measurements of reference signals to self-identify the operational mode and self-configure measurement procedures, reducing the complexity burden on both UE and network
Data Source
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AI summary
A method in a node (405A, 410A) is disclosed. The method comprises obtaining (504) information related to an operational mode of a first cell (415B) to be measured by the node. The method comprises selecting (508) a measurement procedure from a plurality of possible measurement procedures based on the obtained information related to the operational mode of the first cell, wherein one or more measurement parameters of the selected measurement procedure are adapted to the operational mode of the first cell. The method comprises performing (512) one or more measurements in the first cell using the selected measurement procedure.