Conditional D2D Resource Utilization for Interference Control

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Solution Overview

Problem

In wireless communication networks, especially with LTE technology, managing device-to-device (D2D) communication becomes challenging as the increasing demand for resources conflicts with downlink (DL) and uplink (UL) transmissions, leading to interference issues.

Innovation Solution

A method where wireless communication devices receive resource allocation information with conditions for utilizing shared resources for D2D communication, allowing them to decide on resource usage based on radio channel characteristics and interference levels, thereby reducing load on base stations and minimizing interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If resources are allocated for D2D communication, then D2D communication capability is improved, but interference with DL and UL transmissions increases

Engineering Contradiction:

ImproveD2D communication capabilityVSAvoidinterference with DL and UL transmissions

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements dynamic resource allocation where the D2D UE adapts its resource utilization based on real-time channel conditions and base station proximity. The condition-based approach allows the system to dynamically switch between allowing and disallowing D2D resource usage depending on whether the UE is close to or far from the base station, thereby optimizing the balance between D2D communication capability and interference prevention

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of resource allocation by introducing conditional rules based on UE distance from the base station. When the UE is far from the base station, resources are allocated for D2D communication; when close, resources are protected for DL/UL transmissions. This parameter-based conditional allocation resolves the contradiction by adapting resource assignment to spatial conditions

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If base station controls every D2D transmission decision, then interference control is improved, but network load and signaling overhead increase

Engineering Contradiction:

Improveinterference controlVSAvoidnetwork load and signaling overhead

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent introduces an intermediary condition-based rule system that translates base station interference control policies into autonomous UE decision-making capabilities. Instead of direct continuous control, the base station establishes conditional rules (intermediary mechanisms) that enable UEs to independently make resource utilization decisions, thereby reducing signaling overhead while maintaining interference control

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent enables the D2D UE to self-determine resource utilization decisions based on pre-configured conditions and current channel state information. The UE autonomously evaluates whether it meets the distance/condition criteria and independently decides whether to use allocated resources, eliminating the need for continuous base station intervention and reducing network load

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11665669B2Conditional resource utilization for device-to-device communication

Publication Date: 2023.05.30 SONY GROUP CORP

AI summary

A wireless communication device (100, 100′) receives resource allocation information from a wireless communication network. The resource allocation information indicates at least one condition for utilization of a set of resources allocated to device-to-device communication. Depending on the at least one condition, the wireless communication device (100, 100′) controls utilization of the set of resources for device-to-device communication between the wireless communication device (100, 100′) and a further wireless communication device (100, 100′).