Access Network Device Paging Area Determination
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Solution Overview
Problem
In 5G systems, there is a need for an efficient method for the Radio Access Network (RAN) to initiate paging to a terminal device within a suitable paging area, reducing signaling overhead and ensuring effective communication when downlink data is available.
Innovation Solution
The method involves an access network device obtaining a tracking area list of a terminal device, determining a target paging area, and initiating paging within that area when the terminal is in an RRC inactive state, with the option to request or receive the tracking area list from the core network, and sending information to the terminal to reconfigure the paging area if it moves out of the target area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the RAN initiates paging to the terminal without using a tracking area list, then the paging can be performed quickly, but the signaling overhead increases and the paging area cannot be optimized
Solution Approach 1:
The terminal device pre-obtains and stores a tracking area list before paging is needed. When the RAN needs to page the terminal, it retrieves the pre-stored tracking area list to determine the paging area, avoiding the need for real-time signaling exchange and reducing signaling overhead while maintaining efficient paging.
Solution Approach 2:
The tracking area list serves as an intermediary data structure that bridges the terminal device and the RAN. It contains pre-configured tracking area information that enables the RAN to determine the appropriate paging area without direct real-time communication with the core network, thereby reducing signaling overhead.
2Loss of information
If the RAN uses the tracking area list to determine the paging area, then the signaling overhead is reduced, but the RAN needs to obtain and manage the tracking area list information
Solution Approach 1:
The terminal device maintains and manages its own tracking area list locally. When the RAN needs paging information, the terminal provides its stored tracking area list to the RAN. This self-service approach allows the terminal to manage the complexity of tracking area information while enabling the RAN to perform efficient paging with reduced signaling overhead.
3Adaptability or versatility
If the terminal moves out of the target paging area, then the terminal can access new areas, but the paging area needs to be reconfigured requiring network interaction
Solution Approach 1:
The terminal device monitors its own location and determines when it has moved out of the target paging area. Upon detecting such movement, the terminal actively triggers a reconfiguration of the paging area by interacting with the network. This feedback mechanism ensures that the paging area remains accurate for efficient paging while allowing the terminal to move freely within the network coverage.
Data Source
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AI summary
Disclosed are a method for paging, and an access network device, a terminal device and a core network device. The method comprises: a first access network device acquiring a tracking area list of a terminal device; and the first access network device determining, according to the tracking area list, a target paging area of the first access network device initiating paging to the terminal device. The method, and the access network device, the terminal device and the core network device in the embodiments of the present application are beneficial to the reasonable configuration of a paging area by means of the access network device, thereby reducing the signaling overhead.