Advanced Receiver Interference Cancellation via Restricted Transmission
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Solution Overview
Problem
Wireless communication networks face interference issues due to shared resources among multiple users, leading to degraded performance in both downlink and uplink transmissions, especially as demand for mobile broadband access increases and more devices access long-range wireless networks.
Innovation Solution
Implementing an advanced interference cancellation procedure at transmitter nodes, which involves determining enablement of restricted transmission configurations to reduce interference, and at receiver nodes, obtaining transmission information, determining reference signals, estimating channels, decoding interfering waveforms, and subtracting them from received communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple users share available network resources in wireless communication networks, then network capacity and user access increase, but interference between transmissions increases and performance degrades
Solution Approach 1:
The patent applies interference cancellation technology that converts harmful interference signals into beneficial information. The receiver obtains transmission information about interfering waveforms, determines reference signals, estimates channels, decodes the interfering waveforms, and subtracts them from received communications. This process transforms the harmful interference into a manageable signal that can be removed, thereby improving network capacity without sacrificing communication quality.
2Reliability
If advanced interference cancellation procedures are implemented, then communication quality and signal clarity improve, but device complexity and processing requirements increase
Solution Approach 1:
The patent implements preliminary action by obtaining transmission information about interfering waveforms before attempting to cancel the interference. The receiver proactively gathers information including reference signals, channel estimates, and waveform parameters in advance. This preliminary information collection enables more efficient interference cancellation processing, reducing the computational burden during actual communication while maintaining high communication quality.
Data Source
AI summary
Signaling strategies for an advanced receiver with interference cancellation (IC) and suppression is discussed. Upon enablement of an advanced interference cancellation procedure according to the disclosure, transmitters within the enabled area transmit according to transmission restriction configurations that provide transmission limits based on either frequency, time, or scheduling. The restrictions on the transmitters reduces the complexity of processing by neighboring advanced receivers for cancellation of interference from the restricted transmitters. At the advanced receiver, transmission information, such as scheduling, reference signal (RS), resource block (RB) allocation, and the like, may either be determined through blind detection or received directly through signaling. The advanced receiver may use this transmission information associated with each interfering signal to detect, decode, and subtract the interfering signals from the received transmissions.