D2D Network Architecture for Cellular Interference Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current proximity-based communication technologies, such as those used in mobile broadband networks, are inefficient for device-to-device interactions due to the need for central coordination, which leads to increased power consumption and bandwidth usage, especially in scenarios where devices are in close proximity and can communicate directly.
Innovation Solution
Implementing a Device-to-Device (D2D) network architecture that allows user equipment (UEs) to communicate directly without relying on traditional cellular network infrastructure, using D2D clusters and coordinators to manage resources and minimize interference, with dynamic resource allocation and proximity sensing mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mobile broadband networks are used for proximity-based communication, then network coverage and connectivity are ensured, but power consumption and bandwidth usage increase due to central coordination requirements
Solution Approach 1:
The patent extracts the coordination function from the central network infrastructure and relocates it to the devices themselves. D2D-capable UEs autonomously discover nearby devices and establish direct communication links without requiring continuous network coordination, thereby reducing power consumption while maintaining connectivity through selective use of network resources for resource allocation and interference management
Solution Approach 2:
The network acts as an intermediary that provides resource allocation and interference management for D2D communications rather than direct coordination of each communication pair. This intermediary approach enables efficient D2D operation by managing spectrum resources and coordinating with the cellular network to minimize interference, while allowing devices to communicate directly without continuous network involvement
2Reliability
If traditional mobile broadband networks are used for proximity-based communication, then network infrastructure support is available, but communication efficiency and bandwidth usage deteriorate due to routing through central nodes
Solution Approach 1:
The patent segments the communication path by creating direct D2D communication channels between proximal devices, separating these short-range communications from the traditional cellular routing path. This segmentation allows efficient local communication for proximity-based applications while the network infrastructure continues to provide broader coverage and resource management for devices that require it
Solution Approach 2:
The patent introduces a new communication dimension by establishing direct device-to-device links that operate parallel to the traditional network routing dimension. This creates a multi-dimensional communication architecture where devices can choose the most efficient path - direct D2D for proximal communications and network-routed for distant communications - thereby improving overall communication efficiency
3Use of energy by moving object
If D2D communication is implemented, then power consumption and bandwidth usage are reduced, but interference with traditional cellular communications may increase
Solution Approach 1:
The patent applies local quality by implementing interference coordination specific to D2D scenarios. The network allocates dedicated resource pools for D2D communications and applies localized interference management strategies, such as power control and resource exclusion, only in the vicinity of D2D transmissions, thereby reducing overall interference while maintaining energy efficiency
Solution Approach 2:
The patent implements feedback mechanisms where the network monitors interference levels from D2D transmissions and dynamically adjusts resource allocation and power control parameters. This feedback loop enables the system to maintain low power consumption for D2D communications while preventing harmful interference to cellular communications through real-time coordination
4Productivity
If direct D2D communication is established, then communication efficiency improves, but device complexity increases due to autonomous discovery and resource management requirements
Solution Approach 1:
The patent applies universality by designing D2D functionality that leverages existing cellular infrastructure and protocols. The same network infrastructure that provides cellular service also provides resource allocation and interference management for D2D communications, and existing UE capabilities are extended to support both traditional and D2D modes, thereby improving communication efficiency without proportionally increasing device complexity
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An apparatus and method of allowing user equipment to transmit information directly with other user equipment, using a device-to-device mode is disclosed herein. A device-to-device blank subregion is defined where device-to-device information can be transmitted without interference from other user equipment. The device-to-device blank subregion may be set up such that it is only used in an exclusive mode if a device-to-device cluster is considered highly interfering. A device may join a device-to-device network through the use of a beacon transmission interval, a control transmission interval, and a data transmission interval.