Dynamic RAU Configuration via Segmented Cell Identifiers
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Solution Overview
Problem
In distributed antenna systems (DAS) for wireless communication, configuring remote antenna units (RAUs) with unique communication properties is challenging due to potential identity and interference issues caused by reused physical layer cell identifiers, especially when introducing new cells or base stations, which affects network reliability and data throughput, particularly in high-data-rate environments like indoor spaces.
Innovation Solution
A method and apparatus for dynamically configuring RAUs with remote-antenna-unit-specific communication properties, including assigning sub-cell identifiers and managing maximum allowed transmission power, allowing for adaptive control of cell coverage by activating or deactivating RAUs based on user distribution and demand, thereby ensuring efficient and reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If physical layer cell identifiers are reused in different RAU locations, then the number of unique identifiers is limited and configuration is simplified, but identity and interference problems occur that disturb network operation
Solution Approach 1:
The patent segments the cell identifier into two parts: a global cell identifier (GCID) that is unique to each RAU location, and a physical layer cell identifier (PLCID) that can be reused. This segmentation allows the system to maintain unique identification at the network level while enabling identifier reuse at the physical layer, thus resolving the contradiction between configuration simplicity and network reliability.
Solution Approach 2:
The patent introduces a base station as an intermediary between the network controller and RAUs. The base station receives the GCID from the network controller and distributes it to appropriate RAUs, while also managing the PLCID allocation. This intermediary structure enables coordinated identifier management that prevents conflicts while maintaining system simplicity.
2Reliability
If multiple RAUs are deployed to improve coverage and reliability, then network capacity and reliability increase, but the risk of identifier conflicts and interference increases
Solution Approach 1:
The patent applies local quality by allowing different RAUs to use the same PLCID locally within their specific coverage areas, while the GCID ensures global uniqueness. This means that identifier reuse is permitted in different spatial locations (local quality) without causing interference, as each RAU's signal is uniquely identified by its GCID at the network level.
Solution Approach 2:
The patent adds a new dimension to the identifier system by introducing the GCID as a higher-level identifier that operates above the traditional PLCID. This dimensional addition allows the system to reuse PLCIDs in different locations without conflict, as the GCID provides the necessary global distinction, thus enabling multiple RAUs to operate simultaneously without interference.
3Adaptability or versatility
If dynamic configuration of RAUs is implemented, then adaptability to user distribution improves, but configuration management complexity increases
Solution Approach 1:
The patent implements dynamics by enabling the network controller to dynamically assign and reassign GCIDs to RAUs based on real-time user distribution and network conditions. This dynamic configuration allows the system to adapt to changing traffic patterns and user locations, optimizing network performance while maintaining centralized control to manage complexity.
Solution Approach 2:
The patent incorporates feedback mechanisms where the network controller monitors user distribution and network performance, then adjusts RAU configurations accordingly. This feedback loop enables adaptive configuration management, where the system automatically optimizes RAU placement and identifier assignment based on observed network conditions, reducing the burden on manual configuration management.
Data Source
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AI summary
A method, an apparatus and a computer program product for configuring remote antenna units with communication properties in a radio access communication system employing a distributed antenna system (DAS) are provided. The method comprising: configuring each of the one or more remote antenna units with remote-antenna-unit-specific communication properties dynamically during communication.