Frequency Domain Position Determination for MTC Terminals
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Solution Overview
Problem
Low-cost Machine-to-Machine (M2M) devices with limited reception bandwidth in LTE systems face challenges in determining the frequency domain position for data transmission, leading to incorrect data reception and low resource utilization.
Innovation Solution
Divide the available system bandwidth into pre-defined candidate positions and determine a frequency domain position for data transmission based on these positions, using criteria such as cell ID, UE ID, and types of information to ensure accurate data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an additional system message is used to indicate the frequency domain position for low-cost MTC UE, then the terminal can determine its reception bandwidth position, but data transmission accuracy deteriorates and resource utilization rate decreases
Solution Approach 1:
The system bandwidth is segmented into multiple candidate positions, and different types of information (system common information vs. UE specific information) are assigned to different frequency domain regions. This segmentation prevents mixing of information types and ensures accurate reception by low-cost MTC UE with limited bandwidth.
Solution Approach 2:
Different frequency domain positions are allocated for different types of information based on their specific requirements. System common information is placed in one region while UE specific information is placed in another region, optimizing the local quality of each information type's transmission.
2Device complexity
If system common information and UE specific information are transmitted in the same frequency domain position, then resource utilization is simplified, but data transmission accuracy deteriorates due to potential collisions
Solution Approach 1:
The frequency domain is segmented into distinct regions for system common information and UE specific information. This segmentation eliminates collisions between different information types while maintaining clear and manageable resource allocation rules.
3Ease of manufacture
If low-cost MTC UE with limited reception bandwidth is deployed, then device cost is reduced, but resource utilization rate deteriorates due to incorrect data reception
Solution Approach 1:
The frequency domain positions for different information types are pre-configured and predetermined. Low-cost MTC UE can directly use these pre-configured positions without complex calculations or additional signaling, ensuring correct data reception and optimizing resource utilization while maintaining low device cost.
Data Source
AI summary
Disclosed is a method for transmitting data. The method comprises: dividing an available system bandwidth into a plurality of pre-defined candidate positions, and determining a frequency domain position of data transmission based on the pre-defined candidate positions; and transmitting data in the determined frequency domain position. Also disclosed is a device for transmitting data, comprising: a dividing module configured to divide an available system bandwidth into a plurality of pre-defined candidate positions; a determination module configured to determine a frequency domain position of data transmission based on the pre-defined candidate positions; and a transmission module configured to transmit data in the determined frequency domain position.