Multimode Base Station Joint Admission Control
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Solution Overview
Problem
In dual-mode femtocells, independent radio resource management (RRM) admission control mechanisms lead to inefficient use of resources, as user equipment (UE) may be admitted to the least optimal cell for quality of service (QOS), resulting in suboptimal throughput and QOS for both the admitted UE and neighboring cells.
Innovation Solution
Implementing a joint admission control method that shares information between cells of a multi-mode base station, using past behavior statistics and performance predictions to determine the most suitable cell for UE admission, optimizing resource allocation and QOS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent RRM admission control mechanisms are used for each cell, then each cell can independently manage its own resources, but this leads to inefficient use of base-station resources and suboptimal throughput and QOS
Solution Approach 1:
The patent implements joint admission control by merging the RRM management functions across multiple cells. The base station evaluates admission requests considering the load and characteristics of all cells simultaneously, rather than independently. This unified approach allows optimal resource allocation across the entire base station, resolving the contradiction between independent management flexibility and overall efficiency.
2Ease of operation
If a UE is admitted to a cell based on independent RRM control, then the admission decision is made quickly and independently, but the UE may be admitted to the least optimal cell for its QOS requirements
Solution Approach 1:
The system performs preliminary evaluation of multiple cells before final admission decision. By assessing the load, characteristics, and QOS requirements of all cells in advance, the base station can make informed decisions about which cell is most suitable for the UE, ensuring optimal QOS matching before admission occurs.
Solution Approach 2:
The joint admission control mechanism incorporates feedback about cell load and characteristics into the admission decision process. The base station continuously monitors cell status and uses this information to make adaptive admission decisions, ensuring that UEs are directed to cells that can best meet their QOS requirements.
3Quantity of substance
If one cell is fully loaded while another is lightly loaded, then resource utilization varies across cells, but this creates imbalance and reduces overall system efficiency
Solution Approach 1:
The joint admission control system dynamically balances resource distribution across cells by continuously monitoring load conditions and adapting admission decisions in real-time. When one cell becomes congested, the system can redirect admission requests to less loaded cells, creating dynamic load balancing that maintains overall system efficiency while respecting individual cell capacity constraints.
Data Source
AI summary
A method of controlling admission of a user equipment to a cell of a multi-mode base station, being a base station arranged to operate as a plurality of cells, the plurality of cells comprising at least a first cell and a second cell, and the method comprising: determining information relating to the first cell, and controlling admission of a user equipment to the second cell in dependence on the information relating to the first cell.