Coordinator Node for Inter-CRAN Resource Allocation
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Solution Overview
Problem
Conventional cloud radio access network (CRAN) solutions fail to effectively address interference between neighboring CRANs, despite addressing interference within individual CRANs, by limiting information exchange and not allowing fine-grained resource allocation decisions across spatial areas.
Innovation Solution
A coordinator network node that receives radio measurements from multiple network access nodes, determines joint resource allocation areas where interference occurs, and transmits area specifications to each node to optimize resource allocation, using machine learning algorithms to harmonize resource allocations across neighboring CRANs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional CRAN resource allocation algorithms are used, then interference within individual CRANs is addressed, but interference between neighboring CRANs is not addressed
Solution Approach 1:
The patent merges the resource allocation decisions of multiple CRANs into a unified joint resource allocation area. The coordinator network node combines measurement messages from multiple CRANs and determines a joint resource allocation area that spans multiple service areas, enabling coordinated resource allocation across CRAN boundaries to address inter-CRAN interference.
Solution Approach 2:
The coordinator network node acts as an intermediary between multiple CRANs. It receives measurement messages from CRANs, processes the information to identify joint resource allocation areas, and transmits area specification messages back to the CRANs, facilitating coordinated resource allocation without requiring direct peer-to-peer communication between CRANs.
2Device complexity
If statistical information exchange between neighboring cells is limited, then system complexity is reduced, but resource allocation optimization is hindered
Solution Approach 1:
The patent segments the service area into distinct regions: a joint resource allocation area where interference coordination is needed, and separate service areas where conventional resource allocation applies. This segmentation allows the system to exchange only the necessary measurement information (first and second measurement messages) rather than all statistical information, reducing complexity while enabling optimization in the joint area.
3Object-affected harmful factors
If fine-grained resource allocation decisions are made across spatial areas, then interference is minimized, but information processing requirements increase
Solution Approach 1:
The patent applies different resource allocation strategies to different spatial regions. In the joint resource allocation area, fine-grained coordinated allocation is implemented to minimize interference. In other service areas, conventional resource allocation methods are used. This local differentiation allows fine-grained optimization where needed without increasing overall system complexity.
Data Source
AI summary
Embodiments of the disclosure relate to a coordinator network node and one or more network access nodes interworking in a wireless communication system. The coordinator network node determines a joint resource allocation area (ΩUE) based on measurement messages from network access nodes. The determined joint resource allocation area (ΩUE) is thereafter transmitted to the network access nodes. Thereby, the coordinator network node enables to determine the portion of the first or the second service areas that are free from interference from neighbouring network access nodes where each network access node can perform resource allocations independently. It further enables to determine/identify the joint resource allocation area where neighbouring network access nodes significantly interfere each other. Therefore, e.g. resource allocation in the system can be improved. Furthermore, the disclosure also relates to corresponding methods and a computer program.