IoT Reader Trigger Grouping for Collision-Limited Initial Access
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Solution Overview
Problem
Existing 3GPP communication systems face challenges in efficiently integrating Ambient Internet of Things (IoT) devices, particularly in 5G NR systems, due to issues such as power limitations, complexity, and interference during initial access procedures, which affect the deployment and communication efficiency of these devices.
Innovation Solution
The proposed solution involves an improved IoT communication procedure that includes increasing the size of random IDs used in initial access messages to reduce contention and implementing mechanisms to handle potential collisions, specifically for 4-step and 2-step initial access procedures, enhancing the IoT devices' ability to communicate effectively within 5G and future communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple IoT devices perform initial access procedures simultaneously, then communication efficiency is improved, but message collisions and interference increase
Solution Approach 1:
The patent divides IoT devices into multiple groups and uses group-specific trigger messages to segment the initial access procedure into time-division slots. Each group transmits its messages in a dedicated time window, preventing collisions between devices while maintaining parallel processing across groups, thus improving overall communication efficiency.
Solution Approach 2:
The patent implements preliminary grouping of IoT devices before the initial access procedure. Devices are pre-assigned to groups and configured with group-specific parameters, enabling the system to manage simultaneous access attempts by organizing them in advance according to their group memberships, thereby reducing collisions.
2Reliability
If random ID size is increased to reduce contention, then collision probability decreases, but message overhead increases
Solution Approach 1:
Instead of using a single large random ID for all devices, the patent segments the identification into group-specific IDs. Each group has its own smaller ID space, reducing the ID length required while maintaining uniqueness within the active group. This segmentation approach reduces message overhead compared to using a comprehensive large ID for all devices.
3Object-generated harmful factors
If group-based triggering is implemented, then interference is reduced, but system complexity increases
Solution Approach 1:
The patent implements a universal grouping mechanism that can accommodate multiple group configurations and triggering scenarios within a single framework. The group-based triggering system can handle various cases including single-group and multi-group configurations, as well as different triggering patterns, without requiring separate complex mechanisms for each scenario.
Data Source
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AI summary
The present disclosure relates to an Internet of Things, loT, device comprising the following. A transceiver of the loT device receives an initial trigger message from a reader, indicating a group of loT devices to be triggered for transmission. Circuitry of the loT device determines whether the loT device is triggered by the initial trigger message, based on the indicated group of loT devices and one or more groups to which the loT device is assigned. In case the circuitry determines that the loT device is triggered by the initial trigger message, the loT device performs an initial access procedure with the reader.