Satellite Transponder Handover Packet Synchronization
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Solution Overview
Problem
Existing satellite communication systems face challenges in maintaining continuous real-time wireless coverage during handover periods between satellites, leading to packet loss and duplication due to synchronization issues.
Innovation Solution
A system and method for synchronizing communication protocol packet transfer between two satellite transponders, involving a transmitter, demodulator, and arbitrator to delay or buffer packets, ensuring seamless handover by maintaining correct packet order and preventing loss or duplication, with packet tagging and elastic buffering to adjust packet rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite handover is performed without packet synchronization, then switching between satellites can be done quickly, but packet loss and duplication occur during handover period
Solution Approach 1:
The system performs preliminary synchronization of packet sequences from setting and rising satellites before completing the handover. Packet tags are prepared and matched in advance, ensuring that packets are synchronized and ordered before the handover finalizes, preventing loss and duplication while maintaining continuous service.
Solution Approach 2:
The patent introduces an intermediary synchronization mechanism that mediates between the setting satellite's outgoing packets and the rising satellite's incoming packets. This intermediary process matches packet tags and sequences, ensuring seamless transition without packet loss or duplication during the handover period.
2Stability of the object's composition
If packets from rising satellite are delayed to synchronize with setting satellite, then packet order is maintained, but transmission delay increases
Solution Approach 1:
The system performs preliminary synchronization of packet sequences from setting and rising satellites before completing the handover. Packet tags are prepared and matched in advance, ensuring that packets are synchronized and ordered before the handover finalizes, preventing loss and duplication while maintaining continuous service.
3Reliability
If elastic buffering is used to adjust packet rates, then packet loss is prevented, but system complexity increases
Solution Approach 1:
The patent introduces an intermediary synchronization mechanism that mediates between the setting satellite's outgoing packets and the rising satellite's incoming packets. This intermediary process matches packet tags and sequences, ensuring seamless transition without packet loss or duplication during the handover period.
Data Source
AI summary
The present invention provides a system for handling handover of communication protocol data between two satellite transponder, wherein the satellite transponders are moving in orbit around the earth, enabling to transmit communication protocol data between at least one gateway and terminal. The system is comprised of: at least one transmitter associated with a gateway, at least one de-modulator associated with the terminal a for controlling the packet transmission during handover period, wherein the system is programmed to achieve a seamless hand over process between the two satellites transponders by controlling the transfer and reception of the communication protocol packets during the handover period, by synchronizing the last received packets from the setting satellite packets with first received packets from the rising satellite, wherein seamless handover include maintaining the correct packet order, avoiding packet loss and preventing packet duplication and wherein in case the rising satellite having shorter path, the receipt or transmission of the communication protocol packets from the rising satellite is delayed.