Interference Coordination for GSM-LTE Spectrum Sharing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Intra-frequency and inter-frequency interference between GSM and LTE networks during spectrum sharing hampers efficient utilization of wireless spectrum resources, leading to high costs and reduced network competitiveness due to frequent re-planning and cell restarts.
Innovation Solution
A method and apparatus for interference coordination in an inter-RAT system that acquires and determines time-frequency resources, allowing the LTE network to schedule resources effectively by sharing information about interference relationships between GSM and LTE cells, thereby eliminating intra-frequency interference and improving spectrum utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spectrum sharing is implemented between GSM and LTE networks, then spectrum utilization efficiency is improved, but intra-frequency and inter-frequency interference increases
Solution Approach 1:
The patent segments the shared spectrum into different frequency channels (first frequency channel and second frequency channel) and assigns them to different networks (GSM and LTE) based on interference relationships. This segmentation allows spectrum sharing while avoiding interference by ensuring that interfering signals are allocated to different segmented frequency resources.
Solution Approach 2:
The patent applies local quality by determining interference relationships specifically for different frequency channels and applying different allocation strategies to different local frequency regions. The base station evaluates interference characteristics locally for each frequency channel and makes allocation decisions tailored to each frequency's specific interference profile.
2Object-affected harmful factors
If carrier resources are allocated separately to different networks to avoid interference, then interference is reduced, but spectrum sharing efficiency deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the base station continuously determines interference relationships and dynamically adjusts the allocation of frequency channels between GSM and LTE networks. This dynamic approach allows the system to adapt to changing interference conditions and maximize spectrum sharing efficiency while maintaining acceptable interference levels.
Solution Approach 2:
The patent changes the allocation parameter of frequency channels based on determined interference relationships. When interference is detected between specific networks on specific frequency channels, the system changes the allocation parameter by assigning different frequency channels to different networks, thereby resolving interference while maintaining overall spectrum sharing efficiency.
3Adaptability or versatility
If spectrum refarming is performed frequently to meet changing capacity requirements, then network adaptability is improved, but operational cost increases
Solution Approach 1:
The patent implements a feedback mechanism where the base station continuously monitors interference relationships between different networks on different frequency channels and adjusts resource allocation accordingly. This feedback loop enables the network to adapt to changing capacity requirements and interference conditions without requiring frequent spectrum refarming operations, thereby reducing operational costs while maintaining network adaptability.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
Embodiments of the present invention provide a method, an apparatus, and a device for interference coordination in an inter-radio access technology system to improve utilization of wireless spectrum resources while eliminating intra-frequency interference. The method includes: acquiring information about a time-frequency resource of a first cell and information about an interference relationship between the first cell and the second cell, where the information about the interference relationship between the first cell and the second cell is used to determine interference imposed on the second cell by the first cell on a time-frequency resource, and the first cell and the second cell are cells of different radio access technologies; and determining information about a time-frequency resource of the second cell according to the information about the time-frequency resource of the first cell and the information about the interference relationship, where the information about the time-frequency resource of the second cell is used by the second cell to schedule a time-frequency resource. The method provided by the embodiments of the present invention may eliminate intra-frequency interference from a GSM system to an LTE system and improve utilization efficiency of wireless spectrum resources, and can achieve an objective of rapid LTE deployment through spectrum refarming.