5G Network Side Location Management for Inactive UE Data Delivery
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Solution Overview
Problem
In 5G wireless communication systems, the high signaling and data overhead occurs when transmitting downlink data to user equipment (UE) in an inactive state, as the network side must broadcast data to all cells within the UE's notification area, leading to inefficient data transmission and increased power consumption.
Innovation Solution
Implementing a location management method where the network side stores and updates the UE's location information in real-time, allowing downlink data to be transmitted directly to the UE's current cell, reducing the need for broad network notifications and optimizing data delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network side transmits downlink data to all cells in the RNA area, then the UE can receive downlink data, but signaling and data overhead increases significantly
Solution Approach 1:
The patent extracts the UE's specific location information (cell ID) from the general RNA area and stores it at the network side. This allows the network to target downlink data transmission to the specific cell where the UE is located, rather than broadcasting to all cells in the RNA area, thereby reducing signaling and data overhead while maintaining reliable data delivery.
Solution Approach 2:
The patent performs preliminary action by having the UE report its cell location information to the network side in advance (when transitioning to inactive state or during cell reselection). This pre-stored location information enables the network to efficiently route downlink data without needing to broadcast across the entire RNA area, reducing overhead while ensuring reliable delivery.
2Reliability
If the network side broadcasts downlink data to all cells in the RNA area, then data can be delivered to the UE, but power consumption increases
Solution Approach 1:
The patent extracts and utilizes the UE's specific cell location information to target downlink data transmission only to the cell where the UE is currently located. This eliminates the need for the UE to monitor and process broadcasts from all cells in the RNA area, significantly reducing power consumption while ensuring reliable data transmission.
Solution Approach 2:
The network side performs preliminary action by storing the UE's cell location information in advance. When downlink data needs to be transmitted, the network can directly route it to the specific cell, avoiding unnecessary broadcasts and reducing the UE's power consumption for monitoring and processing.
3Device complexity
If the network side manages UE location only at RNA level, then the system is simple, but data transmission efficiency decreases
Solution Approach 1:
The patent segments the location management into two levels: RNA-level management for general area identification and cell-level management for precise location tracking. This segmentation allows the network to maintain simple RNA-level management while adding cell-level precision only when needed for efficient data transmission, balancing system complexity with transmission efficiency.
Data Source
AI summary
A location management method and a location management device are provided by the present disclosure. The location management method includes: storing, by a network side, location information of User Equipment (UE), when the UE transmits uplink data; or updating, by the network side, the location information of the UE, when the UE reselects another cell and issues a cell update report to an accessed base station.