Ambient IoT Random Access via Ax Interface and Backscatter Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting ambient Internet of Things (IoT) devices with low power consumption and limited mobility, particularly in environments where conventional Uu interfaces are not feasible, necessitating improved random access procedures.
Innovation Solution
A method and apparatus for defining a contention-based random access procedure involving a new interface (Ax) that allows ambient IoT devices to communicate directly with A-IoT readers or UEs, utilizing energy harvesting and backscattering techniques, without requiring an RRC state or HARQ/ARQ support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional Uu interface random access procedure is used, then existing wireless communication systems can maintain standard compatibility, but ambient IoT devices with low power consumption and limited mobility cannot be effectively supported
Solution Approach 1:
The patent segments the random access procedure into two distinct types: Type-1 for conventional Uu interface and Type-2 for ambient IoT devices via Ax interface. This segmentation allows each type to have optimized parameters suitable for their specific requirements, enabling ambient IoT support without compromising existing standard compatibility.
Solution Approach 2:
The patent introduces dynamic configuration of random access parameters including variable timing windows (T1, T2, T3), power control adjustments, and flexible message transmission schedules. This dynamic adaptation enables the system to optimize performance for ambient IoT devices with low power consumption and limited mobility while maintaining compatibility with conventional devices.
2Use of energy by moving object
If ambient IoT devices use energy harvesting and backscattering techniques, then power consumption is reduced, but communication reliability and power control become more challenging
Solution Approach 1:
The patent implements feedback mechanisms where the network side station transmits downlink control information indicating received power levels and signal quality. The ambient IoT device uses this feedback to adjust its backscattering signal strength and transmission timing, ensuring reliable communication while maintaining low power consumption through energy harvesting.
Solution Approach 2:
The patent employs parameter changes including variable power control levels, adjustable timing windows (T1, T2, T3), and flexible message transmission schedules. These parameter adjustments enable the system to adapt to varying channel conditions and power availability, maintaining communication reliability while optimizing energy efficiency for ambient IoT devices.
3Ease of operation
If contention-based random access procedure is implemented for ambient IoT devices, then device integration is simplified, but collision probability increases in dense environments
Solution Approach 1:
The patent implements preliminary actions where the network side station transmits downlink control information in advance, indicating allocated resources and expected reception timing. Ambient IoT devices use this advance information to prepare their transmissions, selecting appropriate timing windows and power levels before actual transmission occurs, thereby reducing collision probability in dense environments.
Solution Approach 2:
The patent employs periodic action through structured timing windows (T1, T2, T3) and repeated transmission opportunities. The contention-based procedure allows devices to transmit in periodic slots with controlled access intervals, reducing simultaneous transmission collisions while maintaining simple device integration. The periodic structure enables multiple devices to share the channel efficiently.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. According to various embodiments of the disclosure, a method for processing a control signal in a wireless communication system may include: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting a second control signal generated based on the processing to the base station.