D2D Communication Resource Configuration Across Heterogeneous Networks
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Solution Overview
Problem
In device-to-device (D2D) communication, when terminals from different carrier networks need to exchange safety information, the existing methods result in significant signaling overheads due to frequent reporting of resource location and time domain calibration information across networks.
Innovation Solution
A method where a base station in one network sends a resource request to a specific terminal to obtain the necessary information for configuring a D2D communication timeslot, reducing the need for terminals to frequently report information from another network, and optionally includes proactive notifications from the second network when resource pool or time domain calibration information changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals frequently report resource location information and time domain calibration information from another network, then the D2D communication configuration can be maintained, but signaling overheads increase significantly
Solution Approach 1:
The patent implements periodic reporting where the terminal reports resource location information and time domain calibration information only at specific intervals or when changes occur, rather than continuously. The base station triggers reporting based on predefined conditions, reducing unnecessary signaling while maintaining configuration accuracy.
Solution Approach 2:
The terminal autonomously monitors changes in resource pool information and time domain calibration information from the second network, and self-initiates reporting only when actual changes are detected. This eliminates redundant reporting of unchanged parameters, significantly reducing signaling overheads.
2Measurement precision
If terminals report information frequently to maintain accurate D2D communication configuration, then configuration accuracy is improved, but communication delays increase
Solution Approach 1:
The base station provides feedback to the terminal about whether the reported information is sufficient for configuration. The terminal adjusts its reporting behavior based on this feedback, reporting only when necessary changes occur in the second network's resource pool or calibration information, thereby reducing delays while maintaining accuracy.
Solution Approach 2:
The terminal performs preliminary monitoring of the second network's resource pool information and calibration data, preparing the information in advance but only reporting when actual changes are detected. This preliminary preparation reduces the processing time when reporting is actually needed, decreasing communication delays.
Data Source
AI summary
A D2D communication method includes: determining, by a base station in a first network, that a D2D communication timeslot in the first network needs to be configured, where the D2D communication timeslot is used for D2D communication between a first terminal in the first network and a second terminal in a second network, and the first network and the second network are different home networks; sending, by the base station, a resource request to a third terminal in the first network, where the resource request is used to instruct the third terminal to report, to the base station, information used to configure the D2D communication timeslot; and receiving, by the base station, a resource request response sent by the third terminal, where the resource request response includes the information used to configure the D2D communication timeslot and obtained by the third terminal from the second network.