IoT Terminal Reference Signal Reception for LTE Coexistence
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently operating IoT devices, particularly in using resources and improving communication reliability for IoT communication systems, especially when transitioning from GSM/GPRS to LTE networks, where resource allocation and interference management are inefficient.
Innovation Solution
A method and device that enable IoT devices to receive and transmit reference signals, antenna port information, and transmission power information, allowing for efficient channel estimation and resource utilization by reusing LTE system components, such as waveforms and subcarrier spacing, to ensure seamless integration and coexistence with existing LTE systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IoT devices operate independently without reusing existing communication system components, then device functionality and adaptability are improved, but system complexity and resource consumption increase
Solution Approach 1:
The patent enables IoT devices to function as both traditional communication devices and machine type communication devices by allowing them to receive and process both dedicated MTC reference signals and legacy LTE reference signals. The device can operate in different modes (first mode for MTC-specific signals, second mode for legacy signals) without requiring separate hardware architectures, thus achieving multi-functionality while maintaining simplicity.
2Reliability
If separate reference signals are designed for MTC devices, then communication reliability for IoT is improved, but resource efficiency and spectrum utilization deteriorate
Solution Approach 1:
The patent merges MTC-specific reference signal requirements with legacy LTE reference signal structures by allowing IoT devices to utilize existing CRS (Cell-specific Reference Signals) and PSS/SSS (Synchronization Signals) from the legacy system. This combining approach enables reliable channel estimation and device identification for MTC devices while reusing already-allocated radio resources, thereby improving resource efficiency without sacrificing communication reliability.
3Productivity
If legacy LTE infrastructure is reused for IoT communication, then resource efficiency and deployment cost are improved, but compatibility and integration complexity worsen
Solution Approach 1:
The patent introduces dynamic mode switching capability where IoT devices can adaptively switch between different operational modes depending on the available reference signals. In the first mode, devices use MTC-dedicated reference signals; in the second mode, they leverage legacy LTE reference signals. This dynamic adaptability allows the system to efficiently reuse existing LTE infrastructure while managing integration complexity through flexible, context-dependent operation.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method by a terminal for transmitting and receiving a signal in a mobile communication system according to an embodiment of the present disclosure includes receiving at least one of information related to a sequence corresponding to a first reference signal, information related to an antenna port corresponding to the first reference signal, and information related to transmission power corresponding to the first reference signal; and receiving the first reference signal based on at least one of the received information.