Satellite UE Paging Using Fine-Grained Access Network Identity
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Solution Overview
Problem
In the context of Space-Air-Ground integrated networks, 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 onto a satellite.
Innovation Solution
A communication method and apparatus that enables a satellite base station to send a request to a core network device with access network identities, allowing the core network to determine and page the UE accurately by considering orbital altitude, frequency band, and polarization mode, thereby enhancing the precision of UE paging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a base station is deployed onto a satellite in a low earth orbit system, then wide beam coverage is achieved, but the precision of UE paging deteriorates due to coarse orbital layer distinctions
Solution Approach 1:
The patent segments the access network identity into multiple fine-grained dimensions including orbital altitude, frequency band, and polarization mode. This segmentation allows the system to distinguish between different satellite beams and access networks with high precision, enabling accurate UE paging while maintaining wide beam coverage.
Solution Approach 2:
The patent introduces multiple dimensional parameters (orbital altitude, frequency band, polarization mode) to describe the access network identity. By adding these dimensions, the system transforms the coarse single-dimensional orbital layer distinction into a multi-dimensional fine-grained identification system, resolving the contradiction between wide coverage and paging precision.
2Productivity
If satellite base stations use high mobility speed for orbital operation, then network coverage is expanded, but paging efficiency deteriorates due to long transmission delay
Solution Approach 1:
The patent implements preliminary action by having satellite base stations send first requests to the core network device in advance, including their access network identities. The core network device stores this information and uses it to directly determine the target satellite base station for paging, eliminating the need for real-time location tracking and reducing transmission delay.
Solution Approach 2:
The patent introduces the core network device as an intermediary that stores the mapping relationship between access network identities and satellite base stations. This intermediary enables efficient paging by allowing the network to directly identify the target base station without complex real-time calculations, reducing paging delay while maintaining expanded coverage.
3Measurement precision
If access network identity includes multiple fine-grained parameters, then paging accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple fine-grained parameters (orbital altitude, frequency band, polarization mode) into a unified access network identity that is carried in standard signaling messages. This merging approach maintains high paging accuracy while avoiding the complexity of processing multiple separate parameters, as the combined identity is handled as a single information element in the protocol.
Data Source
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AI summary
The present disclosure provides a communication method and device, an apparatus and a medium, configured to page a UE. In the embodiments of the present disclosure, 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.