Satellite UE Paging Using Access Network Identity Mapping
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Solution Overview
Problem
In a Space-Air-Ground integrated network, the challenge of efficiently paging User Equipment (UE) in a low earth orbit satellite communication system is exacerbated by high mobility speed, wide beam coverage, and long transmission delay, particularly when a base station is deployed on a satellite.
Innovation Solution
A communication method and apparatus that involves sending a request from a satellite base station to a core network device with access network identities, enabling the core network to determine and page the UE accurately by considering orbital altitude, frequency band, and polarization mode, and storing relevant information for precise targeting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional paging methods are used in satellite communication systems, then the system can maintain simplicity in paging procedures, but paging efficiency deteriorates due to high mobility speed, wide beam coverage, and long transmission delay
Solution Approach 1:
The satellite base station pre-processes and sends access network identity information to the core network device in advance. When paging is needed, the core network device can immediately use this pre-sent information to determine the target satellite base station, eliminating the need for real-time query and reducing paging delay
Solution Approach 2:
The access network identity information acts as an intermediary that bridges the satellite base station and the core network device. This intermediary enables the core network device to quickly identify and page the correct satellite base station without complex real-time communication, thus reducing transmission delay
2Measurement precision
If access network identity information is sent from satellite base station to core network device, then paging accuracy is improved by distinguishing access networks in fine granularity, but device complexity increases
Solution Approach 1:
The access network identity information is segmented into multiple distinct parameters including orbital altitude, frequency band, and polarization mode. Each parameter represents a specific dimension of the access network characteristics, enabling precise identification of satellite base stations through combination of these segmented parameters
Solution Approach 2:
The system uses changes in physical parameters (orbital altitude, frequency band, polarization mode) to differentiate and identify satellite base stations. By monitoring and utilizing these parameter variations, the system achieves fine-grained discrimination of access networks without requiring complex structural modifications
Data Source
AI summary
Provided are a communication method and device, an apparatus and a medium, configured to page a UE. A first satellite base station may send a first request to a core network device, wherein the first request may include first information, the first information may include at least one access network identity each corresponding to an access network type supported by the first satellite base station, such that the core network device may determine, based on the first information, a target satellite base station configured to page a UE, and may send a paging request for the UE to the target satellite base station, and the target satellite base station may page the UE after receiving the paging request.