D2D Signal Interference Elimination via Base Station Parameter Assistance
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Solution Overview
Problem
Current D2D communication systems face inefficiencies in signal transmission and reception, particularly in managing inter-signal interference, especially when involving base stations and user equipment in wireless communication networks.
Innovation Solution
A method for a user equipment in a wireless communication system that involves receiving information on both a second signal for D2D communication and an interference signal from a base station, and using this information to eliminate interference by identifying format and parameter differences, particularly in 3GPP LTE systems, to enhance signal quality and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D communication is implemented in wireless communication systems, then direct device-to-device communication capability is improved, but inter-signal interference between D2D signals and base station signals deteriorates
Solution Approach 1:
The base station performs preliminary actions by predicting D2D signal parameters and proactively transmitting interference signal information to the UE before the interference occurs. This allows the UE to prepare interference elimination in advance, resolving the contradiction between enabling D2D communication and preventing inter-signal interference.
Solution Approach 2:
The patent converts the harmful interference signal into a beneficial element by using the predicted D2D signal parameters to reconstruct and eliminate the interference at the UE side. The interference information, when properly utilized, becomes a tool for improving signal quality rather than degrading it.
2Reliability
If interference signal information is transmitted from base station to user equipment, then signal quality is improved, but communication overhead increases
Solution Approach 1:
The patent transmits interference signal information in the form of parameters (such as D2D signal parameters, resource allocation information, and reference signal information) rather than complete signal data. This parameter-based approach significantly reduces the amount of information that needs to be transmitted while still enabling effective interference elimination at the UE side.
Solution Approach 2:
Instead of transmitting the actual interference signal, the base station transmits parameter information that allows the UE to reconstruct or identify the interference signal locally. This copying approach using parameters rather than full signal data reduces overhead while maintaining signal quality improvement.
3Device complexity
If D2D communication is enabled without base station involvement, then system simplicity is improved, but interference management capability deteriorates
Solution Approach 1:
The base station acts as an intermediary that provides interference management support without taking control of the D2D communication. It predicts D2D signal parameters and provides interference information to UEs, enabling UEs to perform autonomous interference elimination while the base station maintains a supportive role, thus balancing simplicity and interference management capability.
Data Source
AI summary
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method by which a terminal receives a signal in a wireless communication system which supports device-to-device (D2D) communication and an apparatus therefor, the method comprising the steps of: receiving, from a base station, information about a second signal for D2D communication; receiving from the base station, information about a first signal which acts as an interference signal; receiving the second signal along with the first signal from a second terminal; and removing the first signal from the second signal by using the information about the first and the second signal, wherein the information about the second signal includes an indicator for indicating whether the second signal has the same format used in a 3GPP LTE system, and the information about the second signal further includes information about a parameter different from the one that is used in the 3GPP LTE system, if the second signal does not have the same format as used in the 3GPP LTE system.