Ambient IoT Resource Allocation for Backscatter Reception Conflicts
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Solution Overview
Problem
Interference occurs in wireless communication systems due to unclear allocation of radio resources for Carrier Wave (CW) transmission and Backscattering (BS) reception in ambient IoT devices, leading to communication failures between network nodes and wireless tags.
Innovation Solution
A communication control method is implemented where a network node requests specific radio resources for CW transmission and BS reception, including information on cell ID, time, frequency, and tag identifier, to avoid resource conflicts and ensure seamless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If radio resources are not clearly allocated for CW transmission and BS reception, then device complexity is reduced, but interference occurs leading to communication failures
Solution Approach 1:
The network node performs preliminary allocation of radio resources for both CW transmission and BS reception before actual communication occurs. The communication node receives advance notification about which resources will be used for BS reception, allowing it to proactively avoid transmitting CW signals on those resources, thereby preventing interference before it happens.
Solution Approach 2:
The system implements a feedback mechanism where the network node informs the communication node about the allocated resources for BS reception. This feedback loop ensures that the communication node has accurate, up-to-date information about resource usage, enabling it to adjust its CW transmission accordingly and avoid conflicts.
2Reliability
If radio resources are clearly allocated for CW transmission and BS reception, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The communication node autonomously manages its own resource allocation based on notifications received from the network node. Instead of requiring complex centralized coordination or continuous control signaling, the communication node uses the provided resource allocation information to independently determine when to avoid CW transmission, simplifying the overall system architecture.
Solution Approach 2:
The resource allocation is segmented into specific time-frequency resources that are clearly designated for BS reception. By dividing the radio resources into distinct segments with defined purposes, the system avoids the need for complex dynamic arbitration and allows each node to independently manage its transmissions based on clear resource boundaries.
3Productivity
If CW transmission is performed without considering BS reception resources, then productivity is improved, but interference occurs causing communication failures
Solution Approach 1:
The system applies preliminary anti-action by having the communication node proactively refrain from CW transmission on resources allocated for BS reception. Rather than reacting to interference after it occurs, the communication node anticipates potential conflicts by checking the allocated resources before transmitting, thereby preventing communication failures before they happen.
4Device complexity
If BS reception resources are not notified to communication nodes, then network node complexity is reduced, but resource allocation accuracy deteriorates
Solution Approach 1:
The system uses a standardized notification mechanism as an intermediary between the network node and communication nodes. This intermediary structure allows the network node to efficiently communicate resource allocation information without requiring complex individualized interactions with each communication node, maintaining both low complexity and high accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively allocates resources to prevent interference, ensuring reliable communication between network nodes and wireless tags, enhancing the efficiency and reliability of ambient IoT systems.
Implementation Method 1
requesting, by a communication node, a network node to perform backscattering (BS) reception of a signal reflected from a wireless tag
Data Source
AI summary
A communication control method according to the disclosure is a communication control method in a wireless communication system. The communication control method includes requesting, by a communication node, a base station to perform backscattering (BS) reception of a signal reflected from a wireless tag. The request includes information indicating at least one selected from the group consisting of a radio resource used for the BS reception, a cell ID indicating a cell operated by the base station that performs the BS reception, and identifier information indicating an identifier identifying the wireless tag.