D2D Resource Pool Reconfiguration for Load Balancing

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Solution Overview

Problem

In D2D communication systems, autonomously allocated resources by devices without central scheduling lead to inefficient usage, resulting in uneven resource loading, interference, and waste due to lack of resource utilization awareness.

Innovation Solution

A D2D communication method where devices determine resource usage parameters, such as occupation and collision rates, to report to network devices, enabling dynamic reconfiguration of resource pools to balance load and reduce interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If D2D devices autonomously allocate resources without central scheduling, then device autonomy and operation simplicity are improved, but resource utilization efficiency deteriorates due to lack of coordination

Engineering Contradiction:

Improvedevice autonomyVSAvoidresource utilization efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent implements a feedback mechanism where D2D devices report resource usage information (such as resource occupation rate and collision rate) to the network device. The network device uses this feedback to dynamically adjust and reconfigure resource pools, thereby improving resource utilization efficiency while maintaining device autonomy through autonomous selection from reconfigured pools.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The network device acts as an intermediary that receives resource usage reports from D2D devices, processes this information, and generates reconfiguration indications. This intermediary role enables coordinated resource management without requiring continuous central scheduling, resolving the contradiction between device autonomy and resource efficiency.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If D2D devices autonomously select resources from resource pools, then allocation flexibility is improved, but resource distribution uniformity deteriorates leading to heavy loading on some resources

Engineering Contradiction:

Improveallocation flexibilityVSAvoidresource distribution uniformity

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent implements dynamic resource pool reconfiguration where the network device adjusts resource pools based on real-time usage patterns. Resources are dynamically reallocated from heavily loaded sub-pools to lightly loaded sub-pools, maintaining allocation flexibility while achieving uniform distribution through continuous adaptation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The network device changes resource allocation parameters by reconfiguring resource pools based on reported usage metrics. This includes adjusting the composition of resource pools, changing which resources are included in each pool, and modifying pool sizes to achieve uniform distribution while preserving flexibility.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If D2D devices cannot learn about usage of D2D resources, then device complexity is reduced, but interference increases due to simultaneous transmission on overlapped resources

Engineering Contradiction:

Improvedevice complexityVSAvoidinterference

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Inventive Principle:

Principle #24Intermediary (Mediator)

4Adaptability or versatility

If resource pools are independently allocated to D2D devices, then device independence is improved, but resource waste increases when distribution density is low

Engineering Contradiction:

Improvedevice independenceVSAvoidresource waste

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent implements resource pool reconfiguration that merges or combines resource pools when distribution density is low. The network device consolidates resources from multiple devices into shared pools, reducing waste while maintaining device independence through autonomous selection mechanisms. Devices can still independently select from the shared pool without direct coordination.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11647547B2D2D communication method and D2D device

Publication Date: 2023.05.09 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided are a method for D2D communication, and a D2D device. The method comprises: a D2D device determining a target resource of a resource pool, wherein the resource pool is used for D2D communication, and the target resource is an occupied resource in the resource pool or a conflict resource in the resource pool, with the conflict resource being a resource simultaneously occupied by a plurality of D2D signals in the resource pool; and the D2D device determining a resource usage parameter of the resource pool according to the target resource, wherein the resource usage parameter is used for indicating a ratio of the occupied resource to the total resources of the resource pool, or the resource usage parameter is used for indicating a ratio of the conflict resource to the total resources of the resource pool.