D2D Communications Device Interference Detection
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Solution Overview
Problem
Current LTE networks face limitations in network capacity and geographical coverage, especially during high load conditions or when devices are outside coverage areas, due to the need for centralized resource allocation and interference management in device-to-device (D2D) communications.
Innovation Solution
A communications device equipped with a transmitter and receiver for D2D communications, featuring interference detection and reporting capabilities, allowing devices to adjust resource usage and operate independently of LTE coverage areas without a central coordinating entity, using a wireless access interface with control and data resources for scheduling and interference indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized resource allocation and interference management is used in D2D communications, then network control and coordination are improved, but device complexity and network load increase
Solution Approach 1:
The patent enables D2D devices to autonomously detect interference and select resources without centralized coordination. Each device monitors the wireless medium, identifies available resources, and makes independent transmission decisions, eliminating the need for complex central coordination while maintaining reliable communication
Solution Approach 2:
The patent implements feedback mechanisms where devices report interference conditions and resource availability to peers. This distributed feedback system allows devices to adapt their transmissions based on real-time channel conditions without requiring centralized control, resolving the contradiction between reliability and complexity
2Device complexity
If D2D communications operate within LTE coverage areas, then network coordination is simplified, but geographical coverage and autonomy are limited
Solution Approach 1:
The patent segments the D2D communication system into autonomous devices that can operate independently of LTE network coverage. By dividing the coordination function across multiple devices rather than requiring central network control, the system extends coverage to areas outside LTE infrastructure while maintaining simplified operational protocols
Solution Approach 2:
The patent changes the operational parameters of D2D devices to enable autonomous resource selection and interference detection. Devices transition from network-controlled operation to autonomous operation, adjusting transmission parameters based on local channel conditions, thereby extending geographical coverage without increasing coordination complexity
3Productivity
If interference detection and reporting is implemented in D2D communications, then resource allocation efficiency is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent implements self-service interference detection where each D2D device autonomously monitors the wireless medium for interference and independently selects resources based on detected conditions. This eliminates the need for complex centralized interference management while improving resource allocation efficiency through distributed decision-making
Solution Approach 2:
The patent applies partial interference detection by having devices monitor only relevant frequency resources and time slots for interference. Rather than comprehensive monitoring of all possible resources, devices perform selective detection based on their transmission needs, improving resource allocation efficiency while minimizing device complexity and signaling overhead
Data Source
AI summary
A communications device comprising a transmitter for transmitting signals representing device-to-device communications to a second communications device across a wireless access interface, a receiver for receiving signals representing device-to-device communication from the second communications device across the wireless access interface, the wireless access interface including a control resource for communicating control data between communications devices and a data resource for communicating user data between communications devices, the control data providing scheduling assignments for the allocation of resources of the data resource, and a controller for controlling the transmitter and the receiver to perform interference detection in one or more of the control resource and the data resource, and to transmit in the control resources, in response to detecting interference in one or more of the control resource and the data resource, signals representing an indication of the detected interference to the second communications device.