Coordinated Scheduling for Multi-Frequency Ultra-Dense Networks
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Solution Overview
Problem
In multi-frequency ultra-dense networking, severe co-channel interference leads to poor signal quality and reduced average transmission rates for terminals, especially in heavily loaded networks.
Innovation Solution
The proposed solution involves dividing the network into a coverage layer and a capacity layer, where the coverage layer combines cells with co-channel interference to reduce interference, and the capacity layer maintains non-combined cells to ensure overall network capacity. A coordinated scheduling method is used to optimize network performance based on terminal network information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cells with co-channel interference are combined to reduce interference, then signal quality is improved, but frequency resource usage is limited and average transmission rate is reduced
Solution Approach 1:
The network is segmented into multiple frequency layers, where some frequencies form coverage layers (with cell combination for interference reduction) and others form capacity layers (without cell combination for resource efficiency). This segmentation allows different frequencies to serve different purposes simultaneously, resolving the contradiction between interference reduction and resource utilization.
Solution Approach 2:
The solution introduces a new dimension - frequency layering - to resolve the two-dimensional contradiction. By organizing frequencies into hierarchical layers (coverage layer and capacity layer), the system can achieve both interference reduction and high resource utilization through coordinated scheduling across layers.
2Object-affected harmful factors
If cell combination is used to resolve co-channel interference, then interference is reduced, but frequency resource usage efficiency decreases
Solution Approach 1:
Multiple frequencies are merged into layered structures where coverage layer frequencies are combined for interference reduction, while capacity layer frequencies remain separate for efficient resource usage. The coordinated scheduling mechanism merges the benefits of both approaches.
Solution Approach 2:
The system changes the parameter of cell combination status differently across frequency layers. Coverage layer frequencies have cell combination enabled (changing the combination parameter from false to true), while capacity layer frequencies maintain cell combination disabled, optimizing both interference reduction and resource efficiency.
Data Source
AI summary
A coordinated scheduling method and a related apparatus are disclosed. The embodiments of this application may be applied to multi-frequency ultra-dense networking. The method includes: A base station first determines one or more frequencies corresponding to cells at a capacity layer and one or more frequencies corresponding to cells at a coverage layer. Some cells at the coverage layer are obtained by combining at least two cells having co-channel interference, and cells at the capacity layer are all cells that are not combined. In addition, the base station further obtains network information of the first terminal on at least one carrier set, and optimizes the current network based on the network information.