LTE-MTC Downlink Control Region Mapping for MTC Terminals

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Solution Overview

Problem

In LTE-MTC systems, the need to maintain backward compatibility with legacy LTE terminals results in weak downlink transmission performance due to data being transmitted in non-LTE PDCCH control regions, which are not optimized for MTC devices.

Innovation Solution

Mapping data from non-LTE downlink control regions to LTE downlink control regions within the same subframe, allowing for enhanced data transmission by utilizing the LTE downlink control region that is no longer required for legacy terminals, thereby improving peak rates and transmission performance for MTC devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If data is transmitted in non-LTE PDCCH control region to support MTC independently deployed, then MTC data transmission is enabled, but downlink transmission performance becomes weak

Engineering Contradiction:

ImproveMTC independent deployment capabilityVSAvoiddownlink transmission performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent merges data transmission from non-LTE downlink control region with LTE downlink control region by mapping the non-LTE data to LTE PDCCH resources. This combining approach allows MTC independent deployment while utilizing the more robust LTE control region for actual data transmission, thereby resolving the contradiction between MTC adaptability and downlink transmission performance.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If LTE PDCCH control region is retained for backward compatibility with legacy LTE terminal, then legacy terminal compatibility is maintained, but downlink transmission performance for MTC becomes weak

Engineering Contradiction:

Improvebackward compatibilityVSAvoiddownlink transmission performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The LTE PDCCH control region is designed to serve dual purposes: maintaining backward compatibility with legacy LTE terminals while simultaneously providing enhanced data transmission capability for MTC devices. The mapping mechanism allows the same LTE control region to fulfill both legacy compatibility requirements and MTC performance requirements.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If data is transmitted in non-LTE downlink control region, then MTC independent deployment is achieved, but transmission efficiency decreases

Engineering Contradiction:

ImproveMTC independent deploymentVSAvoidtransmission efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The LTE PDCCH control region acts as an intermediary that bridges the gap between non-LTE data sources and MTC terminal reception. By mapping non-LTE downlink control region data to LTE PDCCH resources, the system achieves MTC independent deployment while leveraging the more efficient LTE transmission mechanisms for actual data delivery.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12010694B2Data sending and receiving method, device, system, terminal, base station, and storage medium

Publication Date: 2024.06.11 ZTE CORP

AI summary

Provided are a data sending and receiving method, an apparatus, a system, a terminal, a base station and a storage medium. Data carried in a non-Long-Term Evolution (non-LTE) downlink control region of a subframe is mapped to an LTE downlink control region of the subframe, and data carried in the non-LTE downlink control region and the LTE downlink control region of the subframe is sent to an MTC terminal.