Energy-Level Collision Arbitration for Passive IoT Response Slots
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Solution Overview
Problem
Existing collision arbitration mechanisms in energy harvesting enabled communication systems do not account for the varying energy levels of passive IoT devices, leading to inefficient power consumption and potential waste of high-energy signals due to far devices needing to respond immediately.
Innovation Solution
Implement a collision arbitration scheme based on energy levels, where passive IoT devices determine their energy levels based on measurements like RSRP or SSB index, allowing them to respond in slots assigned to their energy level, minimizing power consumption by enabling near devices to respond first and far devices to respond later after harvesting energy from multiple signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If far devices respond immediately using high-energy signals, then response time is reduced, but power consumption increases and energy is wasted
Solution Approach 1:
The system segments the response process into multiple stages based on energy levels. Devices are divided into different energy level groups (first energy level with more slots, second energy level with fewer slots), allowing far devices to accumulate energy across multiple slots before responding, while near devices can respond immediately in earlier slots.
Solution Approach 2:
Far devices perform preliminary energy accumulation by harvesting energy from multiple query messages across different slots before responding. This preliminary action allows them to build sufficient energy reserves to respond later without requiring high-energy immediate transmission.
2Device complexity
If all devices respond in the same time slot, then arbitration is simplified, but signal collisions occur and efficiency decreases
Solution Approach 1:
The arbitration mechanism is segmented into multiple energy levels with different slot assignments. First energy level devices use a first set of slots while second energy level devices use a second set of slots, preventing collisions by spatially separating responses in the time domain based on energy characteristics.
Solution Approach 2:
The system adds an energy level dimension to the traditional single-slot arbitration. By mapping devices to different energy levels and assigning different slot sets to each level, the patent transforms a one-dimensional collision problem into a multi-dimensional solution space where collisions are avoided through energy-level-based slot allocation.
Data Source
AI summary
Embodiments of the present disclosure relate to collision arbitration based on energy levels. A terminal device is provided comprising at least one processor and at least one memory storing instructions. The instructions, when executed by the at least one processor, cause the terminal device at least to: receive, from a second device, configuration information of a plurality of energy levels; determine, based on the configuration information, an energy level to which the first device corresponds from the plurality of energy levels; receive a query message from the second device; and based on the query message, provide a response message to the second device in a slot selected by the first device from a set of slots associated with the energy level. As such, the power consumption of system is minimized and arbitration time is reduced.