Single Interference Cancellation Receiver for LTE NAICS and MUST Operations
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Solution Overview
Problem
Existing LTE systems face challenges in efficiently managing inter-cell and multi-user interference due to the lack of coordination between evolved Node-Bs, particularly affecting cell-edge User Equipment (UE) and cell-center UEs, where standard techniques like NAICS and MUST operate differently and require separate implementations.
Innovation Solution
A mobile communication device and cellular station configuration that utilizes a single interference cancellation and suppression receiver, with a controller to determine whether to perform NAICS or MUST operations based on signaling information, ensuring these operations are not executed simultaneously, thereby optimizing the receiver's usage and reducing implementation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate receivers are implemented for NAICS and MUST operations, then interference cancellation performance is improved, but device complexity increases
Solution Approach 1:
The patent combines NAICS and MUST operations into a single interference cancellation and suppression receiver. The controller selectively executes either NAICS or MUST based on signaling information from the eNB, merging what would traditionally require separate receivers into one unified implementation, thereby reducing device complexity while maintaining interference cancellation performance.
Solution Approach 2:
The single interference cancellation and suppression receiver is designed to perform multiple functions by supporting both NAICS and MUST operations. The controller determines which operation to execute based on signaling information, making the receiver universal and capable of handling different interference scenarios (inter-cell interference via NAICS and multi-user interference via MUST) without requiring separate dedicated receivers.
2Reliability
If both NAICS and MUST operations are performed simultaneously, then comprehensive interference suppression is achieved, but processing time increases
Solution Approach 1:
The controller performs NAICS and MUST operations in periodic alternation based on signaling information from the eNB, rather than attempting simultaneous execution. This periodic selection allows the single receiver to handle different interference scenarios at different times, achieving comprehensive interference suppression while maintaining efficient processing time by avoiding the overhead of simultaneous dual operations.
Data Source
AI summary
A mobile communication device including a wireless transceiver and a controller is provided. The wireless transceiver includes a single interference cancellation or suppression receiver and is configured to perform wireless transmission and reception to and from a cellular station. The controller is configured to receive signaling information of a Multi-User Superposition Transmission (MUST) operation from the cellular station via the wireless transceiver, determine whether to perform a Network-Assisted Interference Cancellation and Suppression (NAICS) operation or the MUST operation according to the signaling information, and not perform both the NAICS operation and the MUST operation simultaneously.