D2D Communication Control via Signal Intensity Measurement
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Solution Overview
Problem
Current mobile communication systems lack a mechanism for effectively controlling Device-to-Device (D2D) communication, leading to underutilization of this technology.
Innovation Solution
A user terminal and base station system that includes a receiver for measurement requests, a controller for signal intensity measurement, and a transmitter for sending measurement information to the base station, allowing the base station to control D2D communication by determining the suitability of D2D communication based on signal reception intensity and location information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D communication is implemented without control mechanisms, then direct communication between user terminals is enabled, but the D2D communication is not effectively utilized and lacks appropriate control
Solution Approach 1:
The base station acts as an intermediary that coordinates D2D communication between user terminals. The base station receives measurement results from user terminals and determines whether to permit D2D communication, providing centralized control while enabling direct peer-to-peer data transmission. This resolves the contradiction by introducing a controlling intermediary that manages D2D operations without preventing the direct communication capability itself.
2Measurement precision
If measurement information is transmitted frequently to enable accurate D2D control, then control accuracy is improved, but signaling overhead and battery consumption increase
Solution Approach 1:
The user terminal autonomously determines whether to transmit measurement information based on a predetermined criterion comparing the measured reception intensity against a threshold. The terminal only transmits measurement results when the criterion is satisfied, rather than transmitting continuously or on fixed schedules. This self-service approach reduces unnecessary transmissions, lowering battery consumption while maintaining measurement precision when needed.
3Productivity
If D2D communication is permitted without base station control, then communication efficiency is improved, but network coordination and resource management deteriorate
Solution Approach 1:
The system implements a feedback mechanism where user terminals measure reception intensity of D2D signals and report results to the base station. The base station uses this feedback information to determine whether to permit D2D communication and to manage radio resources. This feedback loop enables efficient D2D communication while maintaining network coordination, as the base station makes informed decisions based on actual channel conditions reported by terminals.
Data Source
AI summary
A user terminal receives, from a base station, a measurement request for measurement of a reception intensity of a signal transmitted from another user terminal that performs D2D communication, and a threshold value used to determine whether to transmit measurement information related to the reception intensity. The user terminal measures reception intensity of the signal on the basis of the measurement request, and transmits to the base station, the measurement information enabling the base station to perform controls of the D2D communication in response to the measurement information satisfying the threshold value. The user terminal receives from the base station a location request for transmission of location information indicating geographical location of the user terminal. In response to the location request, the user terminal transmits the location information periodically to the base station, the location information enabling the base station to perform controls of the D2D communication.