Master UE Radio Resource Configuration for D2D Communication

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Solution Overview

Problem

In 3GPP LTE-A systems, device-to-device (D2D) communication integration with cellular systems leads to coexistence issues such as control overhead and complexity, particularly when user equipment (UEs) are involved in both D2D and cellular communications, risking radio capability violations and potential performance degradation.

Innovation Solution

The proposed solution involves a master UE obtaining radio resource information from a slave UE during cellular communication to configure radio resources for D2D communication, ensuring that the configuration does not exceed the slave UE's radio capability, thereby preventing performance degradation and resource waste.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If autonomous D2D radio resource control is implemented without coordination, then D2D communication flexibility and autonomy are improved, but radio capability violations and performance degradation occur

Engineering Contradiction:

ImproveD2D radio resource control autonomyVSAvoidradio capability compliance

Core Design Contradiction:

Extent of automationVSReliability

Solution Approach 1:

The master UE obtains radio resource information from the slave UE and uses this feedback to adjust D2D radio resource configuration, ensuring that the configured resources do not exceed the slave UE's radio capability while maintaining autonomous control

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The master UE acquires the slave UE's radio resource information before performing D2D radio resource configuration, allowing preliminary assessment of available radio capabilities to prevent capability violations

Inventive Principle:

Principle #10Preliminary action

2Reliability

If D2D communication is integrated into cellular system, then network control and QoS management are improved, but control overhead and system complexity increase

Engineering Contradiction:

Improvenetwork control capabilityVSAvoidcontrol overhead

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system divides control functions into two segments: C-plane functionality remains under network control for QoS management, while U-plane functionality is autonomously controlled by the master UE for direct radio resource management, reducing overall control overhead

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The master UE acts as an intermediary between the network and the slave UE for D2D radio resource control, obtaining necessary information from the network and making autonomous decisions without requiring direct network involvement in every control action

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11452152B2Radio resource control for D2D communication

Publication Date: 2022.09.20 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

This disclosure generally relates to radio resource control for D2D communication. In one embodiment, a master UE of the D2D communication may obtain radio resource information of a slave UE before performing radio resource configuration for the D2D communication between the master UE and the slave UE. Based on the radio resource information, the master UE may configure radio resource for the D2D communication. In this way, radio resource configuration may be performed for both the D2D communication and cellular communication without violating the slave UE's radio capability.