Terrestrial–Non-Terrestrial Network Mobility Capability Exchange
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing mobility operations between terrestrial networks (TN) and non-terrestrial networks (NTN) due to the lack of effective capability information exchange and handling of mobility operations by network nodes and user equipment (UEs).
Innovation Solution
The proposed solution involves network nodes and UEs obtaining and utilizing capability information to trigger or abort mobility operations between TNs and NTNs, enabling seamless transitions based on the availability and content of this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If capability information exchange mechanisms are implemented between TN and NTN, then mobility operation reliability is improved, but system complexity increases
Solution Approach 1:
The patent introduces capability information as an intermediary element that mediates between TN and NTN networks. This capability information contains UE-specific parameters that enable seamless mobility operations without requiring complex direct coordination protocols between the two network types. The capability information acts as a pre-negotiated understanding that simplifies the handover process while ensuring reliable mobility operations.
Solution Approach 2:
The patent implements preliminary acquisition and storage of capability information before mobility operations occur. By obtaining capability information in advance during initial network access or registration, the system prepares necessary parameters ahead of time, eliminating the need for complex real-time negotiations during actual handover operations. This preliminary action ensures reliable mobility while keeping the system architecture relatively simple.
2Measurement precision
If capability information is obtained and processed, then mobility decision accuracy is improved, but information processing time increases
Solution Approach 1:
The patent obtains capability information in advance during initial network access, registration, or previous handover operations. By having this information readily available in the network node's memory before mobility decisions are required, the system achieves accurate mobility decisions without incurring processing delays during critical handover moments. The capability information is cached and reused across multiple mobility operations.
Solution Approach 2:
The patent extracts only the essential capability parameters needed for mobility decisions from the complete capability information set. By identifying and utilizing only the critical parameters (such as supported frequency ranges, band combinations, and handover capabilities) rather than processing all available capability data, the system achieves accurate mobility decisions with minimized processing time.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may attempt to obtain capability information relating to a mobility operation of a user equipment (UE) transferring from a non-terrestrial network (NTN) to a terrestrial network (TN). The network node may perform at least part of the mobility operation based at least in part on the capability information or attempting to obtain the capability information. Numerous other aspects are described.