IoT Terminal Device Sub-Bandwidth Operation for Power Saving
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Solution Overview
Problem
Current radio systems for Machine Type Communication (MTC) devices, such as those used in IoT, face challenges in achieving low power consumption and latency while maintaining battery life, as they require millisecond-level reaction times and can sleep for extended periods, necessitating efficient power management and radio frequency retuning.
Innovation Solution
Implementing a sub-bandwidth part based operation that determines the need for radio frequency retuning and switches to a bandwidth part based operation, optimizing power consumption and latency by configuring subcarrier spacing and bandwidth to minimize overhead and support diverse data applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If sub-bandwidth part based operation is used, then power consumption is reduced, but radio frequency retuning is required which increases latency
Solution Approach 1:
The system dynamically switches between sub-bandwidth part based operation (for low power consumption) and bandwidth part based operation (for reduced latency). The switching decision is based on determining whether radio frequency retuning is required, allowing the system to adapt its operation mode according to current needs.
Solution Approach 2:
The system changes the operational parameter from sub-bandwidth part based operation to bandwidth part based operation by adjusting the bandwidth configuration. This parameter change enables the system to reduce latency when needed while maintaining low power consumption during normal operation.
2Loss of time
If bandwidth part based operation is used, then latency is reduced, but power consumption increases
Solution Approach 1:
The system dynamically selects the appropriate operation mode based on whether radio frequency retuning is required. When retuning is not needed, sub-bandwidth part based operation is used for power saving. When retuning is required, the system switches to bandwidth part based operation to reduce latency.
Solution Approach 2:
The system changes the operational parameter between sub-bandwidth part based and bandwidth part based modes. This parameter change allows the system to optimize between power consumption and latency based on the specific operational requirements and radio frequency state.
3Use of energy by moving object
If sub-bandwidth part based operation is used, then power saving is enhanced, but system complexity increases due to retuning requirements
Solution Approach 1:
The system automatically determines whether radio frequency retuning is required and switches operation modes accordingly. This self-service mechanism reduces the need for manual intervention and simplifies the overall system operation while maintaining power saving benefits.
Solution Approach 2:
The system manages complexity by dynamically changing operational parameters. The decision to switch between sub-bandwidth part based and bandwidth part based operations is based on clear criteria (radio frequency retuning requirements), which simplifies the control logic despite the presence of multiple operation modes.
Data Source
AI summary
A method includes performing, by a terminal device, a sub-bandwidth part based operation. The method includes determining a requirement for radio frequency retuning, and switching from the sub-bandwidth part based operation to a bandwidth part based operation. The method also includes performing the bandwidth part based operation.