Time-Domain Resource Reservation for LTE-NR Spectrum Coexistence

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Solution Overview

Problem

In the context of limited coexistence system bandwidth, LTE-MTC/NB-IoT and NR systems share the same frequency domain resources, leading to performance issues and potential data conflicts due to their long-term coexistence.

Innovation Solution

A resource indication method and apparatus that utilize first and second indication signaling to reserve and indicate time and frequency domain resources that are not allowed for transmission, using bitmaps and offset information to configure reserved resources for target data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If LTE-MTC/NB-IoT and NR systems share the same frequency domain resources in a limited coexistence system bandwidth, then spectrum utilization is improved, but system performance deteriorates and data conflicts occur

Engineering Contradiction:

Improvespectrum utilizationVSAvoidsystem performance

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent segments the time domain resources by introducing a time domain reservation mechanism that divides the shared frequency domain resources into reserved portions and non-reserved portions. The reservation signaling (RRC signaling) allocates specific time resources for NR system transmission, while other time resources remain available for LTE-MTC/NB-IoT systems, thus preventing data conflicts while maintaining spectrum sharing

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by making the resource allocation characteristics different in different time locations. Through time domain reservation, certain time slots are designated with specific properties (reserved for NR) while other time slots maintain their original sharing characteristics, allowing each system to have optimal performance in its designated time regions

Inventive Principle:

Principle #3Local quality

2Reliability

If time domain reservation signaling is introduced to reserve resources for NR system, then data conflict avoidance is improved, but signaling overhead increases

Engineering Contradiction:

Improvedata conflict avoidanceVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent implements partial action by reserving only the necessary time domain resources for NR system transmission rather than allocating all time resources. The reservation signaling indicates specific time slots that need to be reserved, avoiding unnecessary signaling for resources that don't require reservation, thus reducing overall signaling overhead while still preventing data conflicts

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent uses preliminary action by configuring time domain reservation information in advance through RRC signaling before actual data transmission occurs. This pre-configuration allows the terminal to know in advance which time resources are reserved, eliminating the need for dynamic signaling during data transmission and reducing overall signaling overhead

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP4012960B1Resource indication method, data receiving apparatus and data transmitting apparatus

Publication Date: 2025.12.03 ZTE CORP

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AI summary

Provided are a resource indication method, a resource indication apparatus, a data receiving method and a data receiving apparatus. The resource indication method includes transmitting first indication signaling to a terminal; where the first indication signaling includes reserved time domain resource information used for indicating that reserved time domain resource are not allowed to be used for transmission.