AIoT Intermediate Node Scheduling for Cross-Link Interference Control
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Solution Overview
Problem
Ambient Internet of Things (AIoT) devices experience significant cross-link interference due to sharing carrier frequencies with conventional cellular networks, which is exacerbated by their lower transmission power, leading to detrimental communication issues.
Innovation Solution
Implementing scheduling restrictions in the time and frequency domains to mitigate cross-link interference by separating AIoT communication from access link communication, using resource pools and dynamic scheduling to allocate non-overlapping time resources for AIoT data transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If AIoT devices share carrier frequencies with conventional cellular networks, then frequency spectrum utilization is improved, but cross-link interference increases
Solution Approach 1:
The patent segments the time domain by introducing a time gap between AIoT communication slots and conventional cellular network transmissions. This temporal segmentation allows both AIoT devices and cellular networks to share the same frequency spectrum without simultaneous transmission, thereby reducing cross-link interference while maintaining frequency spectrum utilization efficiency.
Solution Approach 2:
The patent implements preliminary action by establishing a time gap before AIoT transmissions occur, during which conventional cellular networks can complete their transmissions. This advance preparation prevents overlapping transmissions and reduces interference before it can occur, allowing efficient spectrum sharing without harmful cross-link interference.
2Use of energy by moving object
If AIoT devices use lower transmission power, then power consumption is reduced, but signal strength decreases
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a time gap that mediates between AIoT low-power transmissions and conventional cellular network transmissions. This time gap acts as a buffer that protects AIoT devices from interference during their low-power operation, allowing them to maintain energy efficiency while ensuring sufficient signal strength for reliable communication.
3Productivity
If time resources are allocated for AIoT communication, then AIoT data transmission is enabled, but resource contention with cellular networks increases
Solution Approach 1:
The patent segments the time domain by introducing a time gap that separates AIoT communication slots from cellular network transmission slots. This segmentation enables AIoT data transmission to proceed independently without contending for the same time resources as cellular networks, thereby reducing resource contention while maintaining AIoT transmission productivity.
Solution Approach 2:
The patent implements periodic action through the repeated use of time gaps between AIoT transmissions and cellular network transmissions. This periodic separation creates a rhythm where AIoT devices can transmit data at regular intervals without interfering with cellular network operations, enabling sustained productivity while minimizing resource contention through systematic temporal alternation.
Data Source
AI summary
In one aspect, an intermediate node connects an Ambient Internet of Things (AIoT) device and a base station. When executing instructions stored in a memory, a baseband processor of the intermediate node is configured to: decode control information received from the base station to schedule a first set of time resources for AIoT data, and encode or decode the AIoT data for communicating with the AIoT device using the first set of time resources. The first set of time resources is not scheduled for uplink transmission to the base station.