Home eNB Power Management via MME Subscriber Detection
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Solution Overview
Problem
Conventional Home eNBs continue to transmit broadcast information unnecessarily when no subscribers are present in their coverage area, leading to power consumption and interference issues, and lack automatic detection of subscriber presence for seamless connection.
Innovation Solution
A wireless communication system that uses a Mobility Management Entity (MME) to manage the presence or absence of user equipment, allowing the Home eNB to automatically control its power state and broadcast information transmission based on 'outing' and 'return home' messages from user equipment, ensuring efficient power usage and seamless connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the Home eNB continuously transmits broadcast information, then subscribers can be instantly detected and connected when they enter the coverage area, but power consumption increases and unnecessary interference occurs when no subscribers are present
Solution Approach 1:
The Home eNB dynamically adjusts its transmission state based on subscriber presence. When a subscriber enters the coverage area, the system transitions from a low-power state to an active transmission state, ensuring broadcast information is available for immediate connection. When no subscribers are present, the system transitions to a low-power state, reducing energy consumption while maintaining connection reliability when needed.
Solution Approach 2:
The system implements feedback mechanisms where the Home eNB monitors subscriber presence and adjusts its broadcast transmission accordingly. The base station receives information about subscriber entry into the coverage area and responds by activating or deactivating broadcast information transmission, creating a closed-loop control system that balances reliability and power consumption.
2Use of energy by moving object
If the Home eNB stops transmitting broadcast information to save power, then energy consumption is reduced, but the Home eNB cannot detect the approach of subscribers requiring manual reconnection
Solution Approach 1:
The system dynamically switches between transmission and non-transmission states based on real-time subscriber presence detection. When subscribers are detected in the coverage area, the Home eNB immediately resumes broadcast information transmission, ensuring seamless connection without requiring manual intervention. This dynamic adjustment maintains ease of operation while reducing power consumption during idle periods.
Solution Approach 2:
The Home eNB system automatically detects subscriber presence and manages its own transmission state without requiring manual configuration or intervention. The system self-adjusts between active and idle modes, providing seamless service restoration when subscribers return while maintaining power-saving operation during absence.
3Reliability
If the Home eNB continuously transmits broadcast information, then seamless connectivity is maintained, but peripheral cells experience unnecessary interference
Solution Approach 1:
The Home eNB dynamically controls its broadcast transmission based on subscriber presence. When subscribers are present in the coverage area, full-strength broadcast transmission is maintained to ensure reliable connectivity. When no subscribers are present, the transmission is reduced or stopped, eliminating unnecessary interference to peripheral cells while maintaining connection reliability when needed.
Solution Approach 2:
The system uses feedback from subscriber presence detection to control broadcast transmission levels. The Home eNB monitors whether subscribers are in the coverage area and adjusts its transmission accordingly, reducing or stopping broadcast information when no subscribers are present to minimize interference with peripheral cells while maintaining reliability when subscribers are active.
Data Source
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AI summary
A wireless communication system having a first wireless base station or BS (11a) such as a macro eNB, and a second wireless base station or BS (15) such as a Home eNB defining a cell within a cell of the first wireless BS (11a) and usable by a specified mobile station. The wireless communication system includes means registering first identifiers as identifiers of the first BS (11a) and a second identifier as an identifier of the second BS (15) in the specified mobile station in advance. The wireless communication system further includes means for transmitting first information to the second BS (15) when an identifier of a present cell is other than the first and second identifiers, and transmitting second information to the second BS (15) when the identifier of the present cell is the first or second identifier, and controlling an operation of the second BS (15) based on the received first or second information. The system may be used to reduce power consumption of a Home eNB when no mobile station capable of using it is present.