Inter-Cluster Coordination Cell Set Assignment for Edge Cells
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Solution Overview
Problem
Current CoMP technologies face limitations in implementing coordinated scheduling across an entire network, leading to poor coordinated transmission effects for user terminals at cell edges due to limited inter-cell coordination and interference from adjacent cells outside the CoMP cluster.
Innovation Solution
An inter-cell coordinated scheduling method that allows network control devices to assign edge cells from different CoMP clusters into the same coordination cell set based on pre-scheduling requests and radio environment information, enabling coordinated transmission services across multiple clusters and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If CoMP cluster is used as a unit for coordination cell set assigning and coordinated scheduling, then device complexity is reduced and ease of operation is improved, but coordinated transmission effect deteriorates due to limited inter-cell coordination and interference from adjacent cells outside the CoMP cluster
Solution Approach 1:
The patent segments the coordination scope into intra-cluster and inter-cluster levels. Within each CoMP cluster, cells are grouped into coordination cell sets for local coordinated scheduling. Simultaneously, the system enables selective inter-cluster coordination where edge cells can be assigned to coordination cell sets that span multiple clusters, allowing terminals to benefit from both local and broader coordinated transmission without requiring full network-wide coordination.
2Device complexity
If CoMP cluster is used as a unit for coordinated scheduling, then device complexity is reduced, but spectral efficiency deteriorates due to poor coordinated transmission effect at cell edges
Solution Approach 1:
The patent divides the coordination mechanism into hierarchical levels: simple intra-cluster coordination for most cells, and selective inter-cluster coordination for edge cells. This segmentation allows the system to maintain low device complexity for the majority of cells while improving spectral efficiency specifically at cell edges through expanded coordination cell sets that include cells from adjacent clusters.
Solution Approach 2:
The patent applies local quality by differentiating coordination strategies for different cell types. Edge cells, which experience stronger interference and have higher spectral efficiency potential through coordination, are selectively assigned to inter-cluster coordination cell sets. Interior cells continue to use standard intra-cluster coordination, optimizing overall system spectral efficiency without uniformly increasing complexity across all cells.
3Ease of operation
If coordination cell set is assigned only within CoMP cluster, then ease of operation is improved, but coordinated transmission effect deteriorates due to interference from adjacent cells outside the CoMP cluster
Solution Approach 1:
The patent introduces a coordination cell set assignment mechanism that acts as an intermediary between intra-cluster and inter-cluster coordination. The network device selectively assigns edge cells to coordination cell sets that may include cells from other CoMP clusters, creating a buffer zone that reduces interference from adjacent clusters. This intermediary mechanism maintains ease of operation through automated assignment while mitigating harmful interference effects.
Data Source
AI summary
A method includes: receiving, by a first network control device, CoMP pre-scheduling requests respectively corresponding to at least one edge cell and a first edge cell that is adjacent to the at least one edge cell and that belongs to another CoMP cluster; when determining, based on the CoMP pre-scheduling requests, that the at least one edge cell has a second edge cell meeting a preset condition with the first edge cell, sending an inter-cluster pre-scheduling request to a second network control device; and instructing the second network control device to assign a first coordination cell set including the first edge cell and the second edge cell.