Inter-Cluster Cooperative Communication for Mobile Systems
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Solution Overview
Problem
In mobile communication systems, inter-cluster interference significantly affects terminals near cell boundaries, leading to reduced data rates and increased interference, as existing technologies are limited in controlling interference across multiple clusters.
Innovation Solution
A method and device for inter-cluster cooperative communication, where a central unit receives channel information and utility change data from neighboring clusters to determine optimal blank patterns, minimizing interference by scheduling data transmission based on total target function changes across clusters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If neighboring cells use different subcarriers to mitigate inter-cell interference, then interference is reduced, but radio resources usable by one base station decrease
Solution Approach 1:
The patent merges scheduling decisions across multiple clusters by having the central unit determine blank patterns for both the first cluster and second cluster simultaneously. This coordination allows neighboring cells to use the same subcarriers without causing interference, thereby combining radio resources across clusters while maintaining interference mitigation.
2Object-affected harmful factors
If the number of cells controlled by one central unit is increased to improve coordination, then inter-cell interference control improves, but system complexity and control overhead increase
Solution Approach 1:
The patent segments the system into multiple central units, each controlling a specific cluster of cells. This segmentation allows each central unit to manage interference within its own cluster independently, reducing the complexity that would arise from a single central unit managing all cells system-wide.
Solution Approach 2:
The patent introduces an intermediary mechanism where central units exchange blank pattern information between clusters. This intermediary communication allows coordination between clusters without requiring a single centralized controller, thereby managing complexity while achieving inter-cluster interference mitigation.
3Reliability
If multi-cell cooperative schemes are implemented within one cluster, then communication performance of terminals near cell boundary improves, but inter-cluster interference remains uncontrolled
Solution Approach 1:
The patent extends the coordination from a single cluster dimension to multiple clusters by having the central unit determine blank patterns across first and second clusters. This dimensional expansion from intra-cluster to inter-cluster coordination enables interference control across cluster boundaries while maintaining the cooperative benefits within each cluster.
Data Source
AI summary
The present invention relates to a method and device for inter-cluster cooperative communication in a mobile communication system. A central unit operating method for inter-cluster cooperative communication in a mobile communication system comprises processes comprising: a process of receiving channel data from serving sectors in a serving cluster; a process of respectively receiving the magnitude of change of a target function for scheduling depending on whether the serving sector is blank, from neighboring sectors in neighboring clusters of the serving cluster; and a process of determining the blank pattern of the serving cluster, by using the channel data received from the serving sectors, and the magnitude of change of the target function received from the neighboring sectors in neighboring clusters.