Satellite Uplink Pause Timing for Feeder Link Interruptions
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Solution Overview
Problem
The challenge of providing continuous coverage in satellite communication systems is exacerbated by discontinuous coverage due to insufficient satellite deployment and limited coverage range, leading to interruptions in service links and feeder links, which complicates the deployment of services, especially for latency-tolerant services.
Innovation Solution
A communication method involving a core network element that sets a first timer based on feeder link information to manage the connection between a satellite and a ground station, instructing a terminal device to stop sending uplink information before the timer expires, allowing for the transition to an idle state and resuming communication when the connection is restored.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite deployment is increased to provide continuous coverage, then coverage continuity is improved, but system complexity and deployment cost increase
Solution Approach 1:
The patent applies preliminary action by having the network side proactively determine feeder link interruption information before the interruption actually occurs, and notify the terminal in advance. The terminal then preemptively stops uplink transmission and enters idle state before the connection is disrupted, avoiding data loss and unnecessary retransmissions. This resolves the contradiction by maintaining reliable communication during interruptions without requiring increased satellite deployment.
2Productivity
If the terminal continues sending uplink information during connection interruption, then data transmission priority is maintained, but data loss and communication failure occur
Solution Approach 1:
The patent implements feedback by having the network side determine and notify the terminal about feeder link interruption information. The terminal uses this feedback to adjust its uplink transmission behavior - stopping transmission during interruptions and resuming when connections are restored. This feedback mechanism ensures both data transmission priority and communication reliability by preventing data loss during interruptions while maintaining active transmission during stable connections.
3Reliability
If the terminal enters idle state during connection interruption, then uplink data loss is prevented, but service response time increases
Solution Approach 1:
The patent applies dynamics by making the terminal's state flexible rather than fixed - the terminal dynamically transitions between connected state and idle state based on real-time feeder link conditions. When interruptions are detected, the terminal enters idle state to prevent data loss; when connections are restored, it returns to connected state to resume transmission. This dynamic adaptation resolves the contradiction between preventing data loss and maintaining fast response times.
Data Source
AI summary
A communication method is performed by a first core network element and includes: receiving feeder link information sent by an access network device, wherein the feeder link information is for determining information of a connection between a satellite and a ground station; setting a first timer according to the feeder link information, wherein a timing duration of the first timer is not less than an interruption duration of the connection; and sending information of the first timer to a terminal device associated with the connection, wherein the first timer is for instructing the terminal device to stop sending uplink information before expiration of the first timer.