NB-IoT Device Channel Scanning via Predefined Lists
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Solution Overview
Problem
NarrowBand (NB) IoT devices face battery drain and prolonged search times due to intensive scanning across entire spectrum bands to find available NB-IoT cells, which reduces their battery life and operational efficiency.
Innovation Solution
Providing NB-IoT devices with a predefined and updatable channel list containing a limited set of channel numbers associated with available NB-IoT carriers, allowing them to search within a restricted frequency range rather than scanning the entire spectrum band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NB-IoT devices scan entire spectrum bands to find available NB-IoT cells, then they can ensure comprehensive network coverage detection, but battery life is drained and search time is prolonged
Solution Approach 1:
The patent segments the entire spectrum band into multiple frequency ranges, and further segments each frequency range into specific channel numbers. Instead of scanning all frequencies continuously, the device divides the search space into manageable segments (frequency ranges with specific channel numbers) that can be scanned systematically, reducing overall scanning time and energy consumption while maintaining coverage detection capability.
Solution Approach 2:
The patent applies preliminary action by pre-configuring frequency ranges and their associated specific channel numbers before the actual network search. The device receives and stores information about which channel numbers correspond to which frequency ranges in advance, so that during operation it only needs to scan predetermined channels rather than searching the entire spectrum from scratch, significantly reducing search time and energy usage.
2Reliability
If NB-IoT devices scan entire spectrum bands to find available NB-IoT cells, then they can ensure comprehensive network coverage detection, but search time is prolonged
Solution Approach 1:
The patent segments the entire spectrum band into multiple frequency ranges, and further segments each frequency range into specific channel numbers. Instead of scanning all frequencies continuously, the device divides the search space into manageable segments (frequency ranges with specific channel numbers) that can be scanned systematically, reducing overall scanning time while maintaining coverage detection capability.
Solution Approach 2:
The patent applies preliminary action by pre-configuring frequency ranges and their associated specific channel numbers before the actual network search. The device receives and stores information about which channel numbers correspond to which frequency ranges in advance, so that during operation it only needs to scan predetermined channels rather than searching the entire spectrum from scratch, significantly reducing search time.
3Use of energy by moving object
If NB-IoT devices use narrow spectrum frequencies for long-distance communication, then energy consumption is reduced, but the ability to adapt to different network conditions is limited
Solution Approach 1:
The patent applies dynamics by making the channel selection adaptive rather than fixed. The device can receive updated frequency range information and specific channel number assignments from the network, allowing it to dynamically adjust its scanning behavior based on current network conditions, location, and availability. This enables the low-power narrowband device to adapt to different network environments while maintaining energy efficiency.
Data Source
AI summary
A NarrowBand Internet of Things (NB-IoT) device can find a connection to an NB-IoT cell by searching for an available NB-IoT carrier. An available NB-IoT carrier can be found by scanning through frequencies associated with a plurality of channel numbers on a predefined NB-IoT channel list, the plurality of channel numbers being associated with a plurality of NB-IoT carriers offered by one or more base stations. The NB-IoT carriers are frequency bands within a larger spectrum band associated with a telecommunications provider. The NB-IoT device can camp on a particular NB-IoT carrier when the particular NB-IoT carrier has an available physical resource block (PRB).