Base Station Cell ID Auto-Setting via DHCP IP Extraction
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Solution Overview
Problem
General users lack the expertise to easily set cell IDs for base station apparatuses, particularly when installing femto cells, which can lead to inter-cell interference with macro cells, requiring parameter resets.
Innovation Solution
A base station apparatus configuration that includes a receiving section for messages from a server, an extraction section to extract parameters, and a setting section to set a specific cell ID based on these parameters, allowing for autonomous cell ID setting using IP addresses, time information, or other dynamic parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a general user installs a femto cell in an arbitrary place, then the installation flexibility and ease of deployment are improved, but inter-cell interference with macro cells or other femto cells may occur due to arbitrary cell ID assignment
Solution Approach 1:
The patent introduces a server as an intermediary between the femto cell and the network. The server receives cell ID information from the femto cell, determines an appropriate cell ID that avoids interference with macro cells and other femto cells, and returns the determined cell ID to the femto cell. This intermediary mechanism resolves the conflict between installation flexibility and interference prevention by centralizing the cell ID assignment decision-making process.
Solution Approach 2:
The system implements a feedback mechanism where the femto cell transmits its current cell ID to the server, the server evaluates potential interference based on this information and the locations of other cells, and returns a corrected cell ID recommendation. This feedback loop enables dynamic adjustment of cell IDs to prevent interference while maintaining installation flexibility.
2Productivity
If a cell ID is randomly assigned to a femto cell before shipment, then the ease of deployment is improved, but the possibility of high correlation with neighboring macro cells or femto cells increases, requiring parameter resets
Solution Approach 1:
The system performs preliminary interference checking and cell ID determination through the server before the femto cell becomes operational. The server proactively identifies suitable cell IDs that avoid interference with macro cells and other femto cells based on their known locations and assigned cell IDs. This preliminary action ensures reliable interference avoidance while maintaining fast deployment, as the femto cell can be installed immediately without waiting for manual cell ID configuration or encountering interference issues that would require parameter resets.
3Object-affected harmful factors
If experts conduct field investigation and manually optimize cell ID assignment, then inter-cell interference is minimized, but the complexity and time required for deployment increases
Solution Approach 1:
The system enables self-service cell ID optimization through automated server-based determination. Instead of requiring experts to conduct field investigations and manually optimize cell ID assignments, the server automatically receives cell ID information from femto cells, evaluates potential interference using stored information about macro cells and other femto cells, and determines appropriate cell IDs. This self-service mechanism maintains effective interference minimization while eliminating the need for expert intervention and complex manual deployment processes.
Data Source
AI summary
A base station apparatus installed by a general user, wherein a cell ID can be easily set in cases when setting of a cell ID is necessary. In this apparatus, a DHCP message reception unit (105) receives a DHCPACK message from a DHCP server. An IP address extraction unit (107) extracts an IP address stored in the IP address field of the DHCPACK message. A cell ID determining unit (108) sets a unique cell ID for this base station apparatus based on the IP address extracted by the IP address extraction unit (107).