D2MD Precoding for Interference Suppression
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Solution Overview
Problem
Current wireless communication networks face inefficiencies in device-to-device (D2D) communication, particularly in managing interference between D2D and cellular user equipment (UEs) sharing the same frequency band, which degrades Quality of Service (QoS) and requires centralized control, leading to high latency and power consumption.
Innovation Solution
The implementation of device-to-multidevice (D2MD) communication using multiple antennas for simultaneous transmission to multiple receivers, with precoding matrices determined based on channel state information (CSI) to minimize interference and power consumption, allowing for autonomous operation without centralized resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If device-to-device communication is performed on the same frequency band as cellular user equipment, then spectral efficiency is improved, but interference to cellular user equipment increases
Solution Approach 1:
The patent changes the parameter of transmission by using precoding matrices that are determined based on channel state information. This transforms the transmission signal in a way that adapts to the channel conditions and suppresses interference to cellular user equipment while maintaining spectral efficiency.
Solution Approach 2:
The patent converts the harmful interference into a beneficial effect by using the channel state information to design precoding matrices that actively suppress interference. The same frequency band that causes interference is utilized, but the interference is converted into directed signal transmission that benefits the device-to-device communication while protecting cellular users.
2Reliability
If centralized control is used for resource allocation, then interference management is improved, but latency and power consumption increase
Solution Approach 1:
The patent enables device-to-device communication systems to perform autonomous resource allocation and interference suppression without centralized control. The receiving devices determine precoding matrices using channel state information, allowing the system to self-manage interference while reducing latency and power consumption associated with centralized coordination.
3Productivity
If multiple data streams are transmitted simultaneously, then throughput is improved, but interference management complexity increases
Solution Approach 1:
The patent manages the complexity of multiple data streams by changing the transmission parameters through precoding matrices. These matrices are determined based on channel state information and are designed to suppress interference, allowing multiple data streams to be transmitted simultaneously with reduced complexity compared to traditional methods.
Data Source
AI summary
A method for performing device-to-multidevice communication with interference suppression is provided. The method may include selecting at least one receiving user equipment for D2MD transmission, and receiving requested data rates from the selected at least one receiving user equipment. The method may further include acquiring CSI matrices and identifying interference constraints to the C-UEs sharing the same frequency band as the at least one receiving user equipment. The method then includes determining precoding matrices using the acquired CSI matrices and the identified interference constraints to the C-UEs, and performing D2MD transmission to the at least one receiving user equipment using the determined precoding matrices.