UMTS LTE Same-Frequency Networking Interference Reduction
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Solution Overview
Problem
Current technologies do not effectively implement heterogeneous-system same-frequency networking between UMTS and LTE systems, leading to interference and suboptimal system performance.
Innovation Solution
The method involves compressing the frequency bandwidth used by UMTS in same-frequency neighbor cells and staggering the frequency bands of UMTS and LTE systems to create a non-overlapping spectrum, allowing LTE to transmit data through this spectrum and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UMTS and LTE systems use the same frequency for networking, then spectrum utilization is improved, but interference between the two systems increases
Solution Approach 1:
The patent segments the frequency spectrum into distinct allocation regions for UMTS and LTE systems. By dividing the available spectrum and assigning specific frequency ranges to each system, the patent enables coexistence on the same carrier frequency while minimizing mutual interference through structured spectral separation.
Solution Approach 2:
The patent applies local quality by allowing different frequency allocation strategies for different systems within the same carrier frequency. UMTS and LTE systems are assigned different spectral characteristics and allocation patterns in specific frequency regions, enabling optimized performance for each system while maintaining same-frequency operation.
2Object-affected harmful factors
If frequency bandwidth is compressed to create non-overlapping spectrum, then interference is reduced, but available bandwidth for data transmission decreases
Solution Approach 1:
The patent implements dynamic frequency allocation where the non-overlapping spectrum regions are not fixed but can be flexibly adjusted based on traffic demands and system conditions. This dynamic approach allows the network to optimize the balance between interference reduction and bandwidth utilization in real-time, allocating more resources to high-traffic regions while maintaining spectral separation.
Solution Approach 2:
The patent changes spectral parameters by compressing frequency bandwidths and adjusting frequency offsets dynamically. By modifying these spectral parameters, the system creates adaptive non-overlapping regions that reduce interference while preserving maximum usable bandwidth through intelligent parameter optimization.
Data Source
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AI summary
The present invention discloses a method and device for realizing a heterogeneous-system same-frequency networking. The method includes: compressing a frequency bandwidth used actually by a first system in same-frequency neighbor cells to make the frequency bandwidth smaller than a preset bandwidth demand value (400); and staggering frequency bands used by the first system and a second system of the same-frequency neighbor cells (401).