D2D Control Channel Resource Allocation for Interference Reduction

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Solution Overview

Problem

Current D2D communication technologies face challenges in efficiently configuring and allocating resources for the D2D control channel, particularly in reducing signaling overhead and managing interference with cellular channels, while ensuring effective resource usage and coexistence with cellular communications.

Innovation Solution

The method involves generating and transmitting configuration messages that include resource pool information for the D2D control channel, specifically allocating frequency and time domain locations to avoid interference and achieve diversity gain, and using mapping functions to establish relationships between user equipment identifiers and control channel resources, allowing for dynamic adjustment based on traffic load.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If D2D communication uses cellular uplink resources for control channels, then resource reuse is achieved, but interference with cellular channels increases

Engineering Contradiction:

Improveresource reuseVSAvoidinterference with cellular channels

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The resource pool is segmented into multiple sub-pools with different configurations. UEs can be assigned to different sub-pools based on their service requirements and channel conditions, allowing fine-grained resource allocation that reduces interference while maintaining reuse efficiency

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The control channel resource allocation is made dynamic through configured grants that can be activated or deactivated based on traffic load. The network can dynamically adjust the resource pool configuration to balance D2D communication needs with cellular channel protection

Inventive Principle:

Principle #15Dynamics

2Productivity

If network-controlled scheduling is used for D2D communication, then resource allocation is optimized, but signaling overhead increases

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidsignaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

Resource allocations are prepared in advance through configured grants that pre-define resource pools, time-frequency locations, and transmission parameters. This preliminary configuration reduces the need for real-time signaling during actual D2D communication

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

UEs autonomously select resources from their configured grant pools based on local channel conditions and traffic requirements, eliminating the need for continuous network scheduling requests and responses

Inventive Principle:

Principle #25Self-service

3Loss of information

If autonomous resource selection by UEs is implemented, then signaling overhead is reduced, but resource allocation efficiency decreases

Engineering Contradiction:

Improvesignaling overheadVSAvoidresource allocation efficiency

Core Design Contradiction:

Loss of informationVSProductivity

Solution Approach 1:

Each UE is provided with a customized configured grant configuration tailored to its specific service requirements, channel conditions, and QoS parameters. This localized optimization allows autonomous selection while maintaining high allocation efficiency for each UE's specific context

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10624101B2Methods and apparatuses for device-to-device communication

Publication Date: 2020.04.14 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Methods and apparatuses for device-to-device (D2D) communication are provided. In a method, configuration messages including configuration information with respect to a control channel for the D2D communication is generated and the configuration messages are transmitted to user equipments that support D2D communication. With the methods and apparatuses, resources used for D2D control channel are reasonably allocated to explore diversity gain or reduce interference.