Home NB Cell Wake-Up via Proximity Indication
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Solution Overview
Problem
Current methods fail to efficiently wake up Home NB cells or macro NB cells in time to provide service to user equipment in an idle state, leading to network coverage issues due to energy-saving cell sleeping states.
Innovation Solution
A method and system utilizing a specific Tracking Area Update (TAU) process where User Equipment (UE) reports Proximity Indication (PI) information to the network, which determines and initiates an energy-saving wake-up request to wake up the target NB cell using footprint information such as E-UTRAN Cell Global Identifier, Tracking Area Identifier, and CSG Identity, ensuring timely service restoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If Home NB cell enters energy-saving sleeping state, then energy consumption is reduced, but network coverage availability deteriorates
Solution Approach 1:
The patent applies preliminary action by having the UE report PI information before actually needing service from the sleeping cell. The network receives the proximity indication in advance and proactively wakes up the target NB cell before the UE needs to access it, ensuring the cell is ready for service while maintaining energy-saving benefits during idle periods
Solution Approach 2:
The patent implements feedback through the PI reporting mechanism where the UE provides feedback information about its proximity to the target NB cell. The network uses this feedback to intelligently decide when to wake up the cell, creating a closed-loop system that balances energy saving with service availability based on actual UE location and needs
2Loss of energy
If Home NB cell remains in sleeping state to save energy, then energy consumption is reduced, but service availability for idle UE deteriorates
Solution Approach 1:
The system performs preliminary wake-up action based on UE proximity indication before the UE actually needs to access the cell. This ensures the cell is activated in advance, maintaining service availability for idle UEs while keeping the cell sleeping during periods when no UEs are nearby, thus balancing energy consumption with service productivity
Solution Approach 2:
The patent enables self-service by allowing the UE to autonomously detect its proximity to the target NB cell and report this information to the network. The UE monitors its own location and triggers the wake-up process based on its own state, reducing the need for continuous network monitoring and enabling more efficient energy-saving operation
3Reliability
If conventional wake-up method is used, then cell can be woken up, but response time deteriorates
Solution Approach 1:
The patent applies preliminary action by receiving the PI report in advance and initiating the wake-up process before the UE actually needs to access the cell. This advance notification mechanism allows the network to prepare the cell for service in advance, significantly reducing the response time compared to conventional methods where the cell is woken up only after service is requested
Solution Approach 2:
The system uses feedback from the UE's proximity indication to trigger immediate wake-up action. The feedback loop creates a direct cause-effect relationship where the UE's location report instantly initiates the cell wake-up sequence, eliminating delays associated with periodic checks or reactive wake-up mechanisms
Data Source
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AI summary
The disclosure provides a method and a system for waking up a Node B (NB) cell. When a User Equipment (UE) in an idle state arrives in an area of a Home NB cell in which the UE ever resided, but does not search out signals of the Home cell, or when the UE in an idle state finds that signals of a cell in which the UE currently resides get worse, and does not find other better cells, the UE reports Proximity Indication (PI) information to a network side through a specific Tracking Area Update (TAU) process; when determining that there is need to wake up the NB cell according to footprint information which is reported by the UE and obtained in the specific TAU process, the network side wakes up the NB cell. By means of the specific TAU process of the disclosure, it is ensured that the UE in an idle state wakes up the sleeping Home NB cell (or macro cell) in time, so that the UE can get service from the Home NB cell (or macro cell) in time and thus a network coverage problem caused by cell sleeping for saving energy is avoided.