Inter-Terminal Communication Power Control Through Dynamic Role Assignment

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Solution Overview

Problem

Existing inter-terminal communication systems, such as those complying with 3GPP standards like LTE and 5G, face challenges in performing highly accurate transmission power control due to fixed transmission power settings, which can result in power being too large or too small based on terminal positioning.

Innovation Solution

A communication apparatus is configured to operate as a control terminal or controlled terminal, dynamically deciding transmission power control by measuring reception power and issuing commands to adjust transmission power accurately.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If transmission power is fixed to a predetermined value, then the communication system is simple to implement, but transmission power becomes too large or too small according to terminal positioning

Engineering Contradiction:

Improvesimplicity of transmission power settingVSAvoidtransmission power accuracy

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent implements dynamic transmission power control where the control terminal adjusts the transmission power of the controlled terminal based on real-time reception power measurements. The transmission power is no longer fixed but dynamically adjusted according to the actual communication conditions and positional relationships between terminals, resolving the contradiction between simplicity and accuracy.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent establishes a feedback mechanism where the controlled terminal reports its transmission power to the control terminal, and the control terminal measures the reception power of signals from the controlled terminal. Based on this feedback information, the control terminal adjusts the transmission power to achieve optimal communication quality, thereby improving transmission power accuracy while maintaining system simplicity through automated control.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If all terminals share flags indicating receive capability, then transmission power control can be implemented, but highly accurate transmission power control cannot be achieved

Engineering Contradiction:

Improvetransmission power control capabilityVSAvoidtransmission power control accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent segments the transmission power control function by designating one terminal as the control terminal and another as the controlled terminal. This segmentation allows the control terminal to perform precise measurements and adjustments specifically for the controlled terminal, enabling highly accurate transmission power control while maintaining the adaptability of the system through role assignment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent replaces the simple flag-sharing mechanism with a more sophisticated control system where the control terminal actively measures reception power and calculates appropriate transmission power values. This substitution of the control mechanism enables highly accurate transmission power control by using actual measurement data rather than binary flags.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If transmission power is increased to ensure signal reception, then communication reliability improves, but power consumption increases

Engineering Contradiction:

Improvesignal reception reliabilityVSAvoidtransmission power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent dynamically changes the transmission power parameter based on actual communication conditions. The control terminal adjusts the transmission power of the controlled terminal according to the measured reception power and positional relationships, increasing power only when necessary for reliable communication and reducing power when conditions permit, thereby optimizing the balance between reliability and energy consumption.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250287317A1Communication apparatus, control method, and computer-readable storage medium

Publication Date: 2025.09.11 CANON KK

AI summary

A communication apparatus that executes inter-terminal communication complying with a cellular communication standard, decides which of the communication apparatus and a partner apparatus in the inter-terminal communication operates as a control terminal configured to control transmission power, and transmits, in a case where it is decided that the communication apparatus operates as the control terminal, a command to the partner apparatus, and controls transmission power of the partner apparatus by the command.