Energy Saving Cell Access Control for Wireless Networks
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Solution Overview
Problem
The installation of a large number of small cells in communication systems leads to increased interference and power consumption, with existing techniques like semi-static cell on and cell off methods failing to prevent unnecessary energy saving cell wake-ups and degrade MBMS quality.
Innovation Solution
A communication system that includes an energy saving cell switchable between normal and energy saving states, with access restriction control to prevent unnecessary wake-ups by judging the terminal device's access rights, thereby restricting wake-up processes attributed to unauthorized devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If semi-static cell on and cell off methods are used, then power consumption is reduced, but unnecessary energy saving cell wake-ups occur and MBMS quality degrades
Solution Approach 1:
The base station performs preliminary actions by transmitting wake-up indications to the energy saving cell before actual data transmission. This allows the energy saving cell to wake up in advance and perform necessary channel estimations and signal processing, ensuring MBMS quality is maintained while still achieving power savings during idle periods.
Solution Approach 2:
The system dynamically adjusts the wake-up timing and frequency of energy saving cells based on actual traffic demands and MBMS service requirements. The base station can flexibly control when energy saving cells transition between sleep and active states, optimizing the balance between power consumption and service quality in real-time.
2Reliability
If energy saving cells are switched on frequently, then MBMS quality is maintained, but power consumption increases
Solution Approach 1:
The energy saving cell operates in periodic cycles, alternating between sleep mode and active mode. During sleep mode, the cell remains inactive to save power; during active mode, it serves MBMS and data transmission requests. The base station coordinates these periodic wake-ups to ensure quality of service while minimizing overall power consumption.
Solution Approach 2:
The system implements feedback mechanisms where the base station monitors traffic demands and MBMS service quality, then adjusts the wake-up schedule of energy saving cells accordingly. When traffic is low or MBMS quality is sufficient, wake-up frequency is reduced to save power; when demand increases, wake-up frequency increases to maintain service quality.
3Loss of energy
If access restriction control is implemented, then unnecessary wake-ups are prevented, but system complexity increases
Solution Approach 1:
The base station acts as an intermediary that manages access restriction control. It receives data transmission requests, determines whether the energy saving cell should be woken up based on access rights and service type, and coordinates the wake-up process. This centralizes the complexity in the base station rather than distributing it to multiple cells, simplifying overall system architecture.
Data Source
AI summary
A communication system capable of preventing unnecessary switching of an energy saving cell between a normal operation state and an energy saving state. An energy saving cell (ES cell) is in a dormant state that is the energy saving state. In this case, when being notified of a wake-up request message from a communication terminal device (UE), the ES cell executes access restriction control to judge whether the UE can access its own cell. If judging that the UE can access its own cell, the ES cell switches on its own cell and shifts from the dormant state to an active state that is the normal operation state.