D2D Resource Transfer Between Network Coverage Boundaries

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Solution Overview

Problem

In wireless communication systems, Device-to-Device (D2D) operations face challenges when terminals move out of network coverage, leading to resource configuration mismatches and interference between different D2D groups, resulting in loss and inefficiency in D2D communication.

Innovation Solution

A method where a terminal in network coverage transfers D2D resource information to terminals outside the coverage, allowing them to use the same resource configuration, reducing interference and ensuring seamless D2D operations across coverage boundaries.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If terminals use preset configured resources for D2D operation when separated from network coverage, then D2D operation can be maintained, but resource configuration mismatches occur and interference is caused between different D2D groups

Engineering Contradiction:

ImproveD2D operation continuityVSAvoidinterference between D2D groups

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements feedback mechanisms where terminals in network coverage report their D2D resource configuration to terminals outside coverage. This feedback loop ensures that terminals outside coverage receive updated resource allocation information, preventing resource conflicts and interference while maintaining D2D operation continuity.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent introduces an intermediary role played by terminals in network coverage that act as mediators to transfer resource configuration information to terminals outside coverage. This intermediary mechanism resolves the resource configuration mismatch problem by bridging the information gap between covered and uncovered terminals.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If terminals outside network coverage use preset configured resources, then D2D operation can proceed, but resource loss occurs due to configuration mismatches

Engineering Contradiction:

ImproveD2D communication efficiencyVSAvoidresource configuration loss

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent applies preliminary action by having terminals in network coverage prepare and store D2D resource configuration information before terminals outside coverage need it. This advance preparation ensures that when terminals outside coverage require D2D resources, they can immediately obtain the correct configuration without loss or delay.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying mechanisms where terminals in network coverage create copies of their D2D resource configuration information and transmit these copies to terminals outside coverage. This copying approach ensures accurate resource allocation information is replicated and transferred, preventing configuration loss and maintaining communication efficiency.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS10212742B2D2D operation method performed by terminal in wireless communication system and terminal using same

Publication Date: 2019.02.19 LG ELECTRONICS INC

AI summary

Provided are a device-to-device (D2D) operation method performed by a terminal in a wireless communication system and a terminal using the method. The method comprises: receiving D2D configuration information from a network, the D2D configuration information indicating a resource that can be used in the D2D operation within coverage of the network; and when a transmitting condition is satisfied, transmitting a D2D message to a second terminal, the D2D message including resource information indicating a resource that can be used in the D2D operation.