LTE Network Device Segmentation for Interference Cancellation

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Solution Overview

Problem

Conventional LTE network devices face bottlenecks due to increased computing demands from growing numbers of cells, leading to heat, power, memory, and bus limitations, particularly in signal processing and interference cancellation tasks.

Innovation Solution

The implementation of an LTE network device that calculates and transmits pre-calculated metrics to a signal processing center, distributing equalization and interference cancellation across multiple digital signal processors or system-on-chip setups, and utilizing a hierarchical architecture to address the challenges of large-scale cooperative cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the number of cells is increased to expand network coverage and capacity, then the overall system capacity and user data rate improve, but the computing capacity requirements of the signal processing center increase geometrically, leading to heat, power, memory, and bus limitations

Engineering Contradiction:

Improvesystem capacityVSAvoidcomputing capacity requirements

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the signal processing function by introducing a new network device between the base station and the signal processing center. This network device performs equalization and interference cancellation locally, dividing the processing load and preventing the signal processing center from being overwhelmed by geometrically increasing computational demands as cells are added to the network.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a network device as an intermediary component that mediates between the base station and the signal processing center. This intermediary performs critical signal processing tasks (equalization and interference cancellation) locally, reducing the bandwidth and computational load requirements on the signal processing center while maintaining system capacity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If conventional signal processing is used in LTE network devices, then the processing is centralized in a signal processing center, but this centralized approach reaches bottlenecks due to heat, power, memory, and bus limitations as cells increase

Engineering Contradiction:

Improvecentralized processingVSAvoidpower consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The patent segments the centralized processing function by introducing a distributed network device that performs equalization and interference cancellation locally. This segmentation reduces the power consumption of the signal processing center by offloading computationally intensive tasks to the network device, while maintaining ease of operation through automated processing.

Inventive Principle:

Principle #1Segmentation

3Productivity

If the bandwidth between function blocks is increased geometrically to handle more cells, then the system can support more cells, but this increases memory requirements and creates bottlenecks

Engineering Contradiction:

Improvenumber of cells supportedVSAvoidmemory requirements

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The network device acts as an intermediary that processes signals locally, reducing the amount of data that needs to be transmitted to the signal processing center. This decreases the bandwidth requirements between function blocks and reduces memory requirements at the signal processing center, enabling support for more cells without geometrically increasing resources.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Measurement precision

If repeated channel estimation and equalization are performed, then signal processing is thorough, but this increases processing time and computational load

Engineering Contradiction:

Improvechannel estimation accuracyVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The network device performs equalization and interference cancellation as preliminary actions before signals reach the signal processing center. By performing these operations in advance at the network device, the system avoids repeated channel estimation and equalization, reducing processing time while maintaining accuracy through the preliminary processing of channel characteristics.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9231667B2Systems and methods for a long-term evolution network

Publication Date: 2016.01.05 HUAWEI TECH CO LTD

AI summary

A system and method for a LTE network device is provided. The system includes a first signal processing center configured to obtain a plurality of metrics from an LTE network device. The first signal processing center includes a plurality of processors configured to calculate interference based on the plurality of metrics. The signal processing system further includes a second signal processing center configured to receive the calculated interference from the first signal processing center.