Backscatter Time-Slot Allocation for Dense Zero-Power Terminal Access
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Solution Overview
Problem
In scenarios like logistics warehousing and supermarket shopping, a large number of zero-power consumption terminals need to be accessed simultaneously, leading to conflicts during back scattering communication, which existing solutions address with high latency.
Innovation Solution
The method involves determining time domain resource information for back scattering communication based on identification information of communication devices or serving cells, allowing terminals to transmit back scattering signals in a time-division manner to avoid conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple zero-power consumption terminals transmit back scattering signals simultaneously, then communication coverage and terminal access capacity are improved, but signal collisions and communication conflicts increase
Solution Approach 1:
The patent segments the back scattering communication resources by dividing them into different types (first type and second type) based on terminal mobility characteristics. Stationary terminals use first type resources while moving terminals use second type resources, thereby segmenting the terminal population to reduce collision probability and improve communication reliability while maintaining access capacity.
Solution Approach 2:
The patent introduces a new dimension for resource allocation by considering terminal mobility status as an additional classification criterion. This creates a two-dimensional resource allocation framework (signal type × mobility status) that enables more granular resource management and reduces collisions compared to traditional single-dimension allocation methods.
2Productivity
If time domain resource information is determined based on identification information and serving cell information, then communication efficiency and latency are improved, but device complexity increases
Solution Approach 1:
The patent enables terminals to autonomously determine their own time domain resource information by combining their identification information with serving cell information through a predefined formula. This self-service mechanism eliminates the need for complex network-side resource allocation signaling and reduces device complexity while improving communication efficiency through rapid autonomous resource selection.
Solution Approach 2:
The patent transforms the resource allocation problem from a complex signaling exchange into a simple parameter computation task. By changing the determination parameters to use only terminal ID and cell ID (both already available in the terminal), the system achieves efficient resource allocation without increasing device complexity.
Data Source
AI summary
A method of back scattering communication includes: determining by a first communication device, time domain resource information for the back scattering communication according to first information; where the first information is identification information of the first communication device, or the first information is identification information of the first communication device and identification information of a serving cell.