Dynamic Physical Cell ID Allocation in Wireless Small Cells
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Solution Overview
Problem
Conventional methods for allocating Physical Cell IDs (PCIs) in wireless communication systems are inflexible and costly, particularly in ultra-dense small cell deployments, leading to increased interference and high maintenance burdens, as they require manual configuration and are not adaptable to automatic or unplanned deployment scenarios.
Innovation Solution
A device and method for dynamically managing PCIs by grouping them based on predetermined criteria such as PCI values mod 3 or mod 6, allowing reallocation based on the on/off state of small cells, enabling PCI reuse and flexible allocation within small cell clusters to reduce interference and maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed PCI allocation method is used in conventional technology, then PCI assignment is simple and stable, but maintenance cost increases and flexibility decreases in ultra-dense small cell deployments
Solution Approach 1:
The patent implements dynamic PCI allocation where the PCI management entity continuously monitors the operational states of small cells and automatically reallocates PCIs based on current network conditions. When small cells are turned on or off, the system dynamically adjusts PCI assignments without requiring manual intervention, transforming the static PCI allocation into a dynamic adaptive process that reduces maintenance burden while improving flexibility
Solution Approach 2:
The system enables self-service through automated PCI reallocation mechanisms. The PCI management entity autonomously detects changes in small cell states and performs PCI reassignment without human intervention. This self-service capability allows the network to automatically adapt to deployment changes, eliminating the need for manual planning and configuration while maintaining optimal PCI distribution
2Extent of automation
If manual PCI configuration is required, then PCI allocation is straightforward, but it cannot adapt to automatic configuration mechanisms like plug-and-play
Solution Approach 1:
The patent implements feedback mechanisms where the PCI management entity continuously monitors the operational states of small cells and uses this information to make real-time PCI allocation decisions. The system receives feedback about cell on/off states and automatically adjusts PCI assignments accordingly, enabling seamless adaptation to plug-and-play deployment scenarios while maintaining optimal interference management
Solution Approach 2:
The system performs preliminary actions by pre-establishing PCI management rules and monitoring mechanisms that are ready to automatically respond to deployment changes. The PCI management entity is pre-configured to detect state changes and execute reallocation algorithms, enabling immediate automatic configuration when new small cells are deployed without requiring manual planning
3Object-affected harmful factors
If PCIs are not dynamically reallocated when small cells turn on/off, then configuration is simple, but interference between small cells increases
Solution Approach 1:
The patent implements feedback mechanisms where the PCI management entity continuously monitors the operational states of small cells and uses this information to make real-time PCI allocation decisions. The system receives feedback about cell on/off states and automatically adjusts PCI assignments accordingly, enabling seamless adaptation to plug-and-play deployment scenarios while maintaining optimal interference management
Solution Approach 2:
The system performs preliminary actions by pre-establishing PCI management rules and monitoring mechanisms that are ready to automatically respond to deployment changes. The PCI management entity is pre-configured to detect state changes and execute reallocation algorithms, enabling immediate automatic configuration when new small cells are deployed without requiring manual planning
Data Source
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AI summary
Disclosed are a device and method in a wireless communication system, the device comprising an access determination unit configured to determine an access requirement of a user equipment (UE); and a control unit configured to switch a target small cell of the device from a closed state to an open state based on the access requirement of the UE, and reallocate to the target small cell a new physical cell identifier different from the physical cell identifier used in the closed state. According to the embodiment of the present invention, a physical cell identifier can be dynamically allocated in accordance with the open/closed state of the small cell, reducing the burden of cell planning and maintenance cost, and having greater flexibility.