Coordinated Multi-Cell Transmission for Edge User Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE systems, edge users experience poor communication quality due to strong inter-cell interference, and existing static and semi-static Inter-Cell Interference Coordination (ICIC) technologies have limited interference coordination capabilities, which affect spectrum efficiency and scheduling gains.
Innovation Solution
A method and system for coordinated multi-cell transmission, where UEs report signal measurement results to the network, allowing for coordinated scheduling of time-frequency resources among multiple cells, enabling joint signal processing and interference elimination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If static partial frequency multiplex or semi-static interference coordination is employed, then inter-cell interference is reduced, but the interference coordination capability is limited and scheduling gain is influenced
Solution Approach 1:
The patent transitions from static/semi-static ICIC to dynamic CoMP by enabling real-time coordination between multiple cells. The network side device dynamically adjusts transmission parameters including time-frequency resource allocation, precoding matrices, and modulation schemes based on current channel conditions and interference levels, allowing the system to adapt to changing environmental conditions and maximize scheduling gain.
Solution Approach 2:
The patent combines multiple cells into a coordinated transmission system where multiple network side devices work together as a unified entity. By merging the transmission resources and signal processing capabilities of multiple cells, the system achieves enhanced interference coordination and improved edge user performance that cannot be accomplished by individual cells operating independently.
2Reliability
If multiple cells simultaneously transmit data for one user, then signal quality is improved and interference is eliminated, but scheduling information interaction between cells is required which increases system complexity
Solution Approach 1:
The patent introduces a standardized interface mechanism as an intermediary between network side devices for scheduling information exchange. This interface defines standardized message formats and protocols that simplify the interaction complexity, allowing cells to share necessary scheduling information (resource allocations, user identifiers, transmission parameters) without requiring complex custom communication protocols between each pair of cells.
3Ease of operation
If independent scheduling is used in LTE system, then each cell operates autonomously, but edge users experience strong interference from neighboring cells resulting in poor performance
Solution Approach 1:
The patent implements dynamic coordination mechanisms that allow cells to transition between independent and coordinated operation modes. For edge users experiencing strong interference, the system dynamically activates CoMP coordination involving neighboring cells, while maintaining independent operation for users not affected by inter-cell interference, thus optimizing both ease of operation and edge user performance.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
Disclosed are a method and a system for coordinated transmission, and a mobile terminal and network side device. The method for coordinated transmission includes: reposing by the terminal of a signal measurement result (201); determining the coordinated transmission state of the terminal according to said signal measurement result (202); providing transmission service for the terminal according to said determined transmission state (203). Compared with the prior art, application of the present invention can effectively accomplish coordinated transmission among multiple and improve throughput of edge users.