Non-Terrestrial Network Handover Timer Adaptation
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Solution Overview
Problem
5G non-terrestrial networks face significant transmission delays, making existing terrestrial communication protocols and methods inadequate for efficient communication.
Innovation Solution
The method involves user equipment and base stations exchanging system information with parameters that differentiate between terrestrial and non-terrestrial networks, enabling the user equipment to determine the type of network and perform handovers based on timers and mobility information, optimizing communication procedures for non-terrestrial environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terrestrial communication protocols are used in non-terrestrial networks, then existing infrastructure can be utilized, but transmission delays increase significantly
Solution Approach 1:
The patent modifies communication parameters including timer values, handover thresholds, and random access parameters to adapt terrestrial protocols for non-terrestrial networks. These parameter changes enable the system to compensate for increased transmission delays while maintaining protocol functionality.
Solution Approach 2:
The patent introduces dynamic handover mechanisms with timers that allow user equipment to switch between terrestrial and non-terrestrial networks based on real-time conditions. This dynamic adaptation enables the system to respond to varying network conditions and minimize transmission delays.
2Area of stationary object
If non-terrestrial networks are deployed to meet 5G requirements, then coverage is extended, but transmission delays increase
Solution Approach 1:
The patent implements preliminary handover preparation by setting timers and thresholds before network switching is needed. This allows the system to pre-configure handover parameters and identify suitable target networks in advance, reducing the impact of transmission delays during actual handover operations.
Solution Approach 2:
The patent incorporates feedback mechanisms where user equipment reports network conditions and handover status to the network side. This feedback loop enables continuous optimization of communication parameters and timely adjustment of handover decisions to minimize transmission delays in non-terrestrial networks.
3Reliability
If handover mechanisms are implemented for network switching, then connectivity is maintained, but power consumption increases
Solution Approach 1:
The patent enables user equipment to autonomously manage handover decisions by evaluating local network conditions and making self-determined switching choices. This self-service approach reduces the need for continuous network control and signaling, thereby lowering power consumption while maintaining reliable connectivity.
Solution Approach 2:
The patent implements periodic handover monitoring with timers that trigger handover evaluations at scheduled intervals rather than continuously. This periodic action reduces the frequency of handover operations and associated power consumption while still maintaining adequate connectivity through timely network switching.
Data Source
AI summary
The present application relates to a user equipment, a base station and method for communication in non-terrestrial network. The base station broadcasts a system information which includes a parameter related with a non-terrestrial network. The user equipment receives the system information and determines whether the base station is a non-terrestrial base station based on the parameter. Further, for initializing handover procedure, the base station generates a timer and transmits a message of handover command with the timer to the user equipment. The user equipment receives the message and handovers from the base station to another base station when the timer expires.