Interference Cancellation in Wireless Network Cooperative Communication
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently distributing traffic and managing interference signals, which affect data transmission rates and power consumption, particularly in multi-user scenarios where UEs share the same frequency-time resources.
Innovation Solution
A method and apparatus for a user equipment (UE) to receive power multiplexing information from a base station (BS), calculate interference signal power using a reference signal, and isolate the data signal by eliminating interference from the downlink signal, enabling efficient signal transmission and reception through network cooperation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UEs share the same frequency-time resources in multi-user scenarios, then resource utilization efficiency is improved, but interference signal power increases and data transmission reliability deteriorates
Solution Approach 1:
The patent converts the harmful interference signal into a beneficial component by having the UE receive and measure the interference signal from another UE sharing the same resources. The interference signal power is calculated and used to subtract the interference component from the received signal, transforming the harmful interference into useful information for interference cancellation and improving data transmission reliability.
2Device complexity
If interference signals are not mitigated in multi-user scenarios, then device complexity is reduced, but data transmission rate deteriorates
Solution Approach 1:
The patent applies preliminary action by having the UE receive power multiplexing information and calculate interference signal power before decoding the data signal. The UE uses the reference signal and power multiplexing information to pre-calculate the interference component, which is then subtracted from the received signal. This preliminary interference cancellation enables higher data transmission rates by removing the interference barrier before data extraction.
Data Source
AI summary
A method for receiving a downlink signal from a base station (BS) by a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving power multiplexing information from the BS, receiving a reference signal and the downlink signal from the BS, calculating reception power of an interference signal from reception power of the downlink signal, using the reference signal and the power multiplexing information, and acquiring a data signal of the UE by eliminating the reception power of the interference signal from the reception power of the downlink signal.