Narrowband MTC UE Downlink Reception via Preset Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LTE-based Machine Type Communication (MTC) User Equipment (UE) faces challenges in correctly receiving downlink information due to narrowband conditions, with existing solutions failing to effectively determine time-frequency domain positions, leading to issues in coexistence with conventional UEs and limiting the application range of the system.
Innovation Solution
The proposed method involves transmitting downlink data within the preset receiving bandwidth of the UE, using predetermined radio frames, subframes, and time-frequency resources, allowing for correct reception of downlink information even under narrowband conditions, enabling the coexistence of different types of UEs and expanding the system's application range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the receiving bandwidth of MTC UE is reduced to lower cost, then the cost of MTC UE is reduced, but the ability to receive downlink information correctly deteriorates under narrowband conditions
Solution Approach 1:
The patent segments the downlink transmission by allocating specific subframes and time-frequency resources dedicated to narrowband MTC UEs. The base station divides the system bandwidth into narrowband regions and assigns specific resource blocks within these regions to MTC UEs, enabling them to receive downlink information correctly despite having reduced receiving bandwidth capability.
2Ease of manufacture
If the receiving bandwidth of MTC UE is reduced to lower cost, then the cost of MTC UE is reduced, but the coexistence with conventional UEs becomes problematic
Solution Approach 1:
The patent applies local quality by creating distinct transmission characteristics for different UE types. Conventional UEs receive wideband transmissions across the full system bandwidth, while MTC UEs receive narrowband transmissions within specific frequency regions. The base station adapts the transmission quality and resource allocation locally according to the UE type, enabling both types to coexist without interference.
3Productivity
If downlink data is transmitted using conventional LTE frame structures, then spectral efficiency is maintained, but narrowband UEs cannot correctly receive the information
Solution Approach 1:
The patent introduces dynamic resource allocation where the base station flexibly assigns time-frequency resources to MTC UEs based on their specific needs and the current system conditions. The narrowband resource allocation is dynamically adjusted within the conventional LTE frame structure, allowing the system to maintain overall spectral efficiency while ensuring reliable reception for narrowband UEs through adaptive resource distribution.
Data Source
Figure 1~3
Figure 4~6
Figure 7~8
AI summary
Provided are an information transmission method and device. The method includes that: a base station determines that a receiving bandwidth of first User Equipment (UE) is smaller than a system bandwidth or a component carrier accessed by the first UE is of a New Carrier Type (NCT); and the base station transmits downlink data to the first UE within the receiving bandwidth of the first UE according to a preset Radio Frame (RF), preset subframes and/or preset time-domain and frequency-domain resources. By the present invention, the problem of how to correctly receive downlink information under a downlink narrowband condition in a related art is solved, UE of different types can coexist in a system, and an application range of the system is widened.