Satellite Receiver Sleep Cycle Management for Power and Latency

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Solution Overview

Problem

Current satellite-based broadcast data services face challenges in achieving an optimal balance between latency and receiver power consumption, particularly when multiple broadcast originators and receivers are involved, leading to inefficiencies in power usage and potential waste due to imprecision in transmission timing.

Innovation Solution

A satellite system controller with a receiving module, interval selector, and scheduler is introduced to manage sleep cycles for satellite receivers, allowing for precise control over transmission intervals and epoch times, ensuring receivers are powered down during non-transmission periods and awakened only for relevant broadcasts, thereby optimizing power usage and latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If receivers are kept powered on continuously to achieve low-latency delivery, then latency is reduced, but power consumption increases

Engineering Contradiction:

ImprovelatencyVSAvoidpower consumption

Core Design Contradiction:

Loss of timeVSUse of energy by moving object

Solution Approach 1:

The receiver device operates in periodic cycles, alternating between active listening states and low-power sleep states. The receiver wakes up at specific intervals to check for messages and then returns to sleep mode, achieving periodic action that balances power consumption with message delivery responsiveness

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system pre-configures sleep cycle parameters and message filtering criteria before the receiver enters low-power mode. The receiver device pre-establishes which messages are relevant to filter for later processing, performing preliminary actions that enable efficient wake-up decisions without continuous monitoring

Inventive Principle:

Principle #10Preliminary action

2Use of energy by moving object

If receivers enter low-power sleep cycles to conserve battery, then power consumption is reduced, but message delivery precision deteriorates

Engineering Contradiction:

Improvepower consumptionVSAvoidmessage delivery precision

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The system implements feedback mechanisms where the receiver device reports its sleep cycle status and message reception state back to the network. This feedback enables the network to adjust message transmission timing and ensures that important messages are delivered during active periods or properly buffered for wake-up processing

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

A message filtering and buffering mechanism acts as an intermediary between incoming messages and the receiver device. Relevant messages are filtered, buffered, and marked for processing during wake-up periods, while non-critical messages are discarded or deferred, maintaining precision without requiring continuous receiver activity

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If multiple broadcast originators use different transmission intervals, then system adaptability is improved, but receiver power management complexity increases

Engineering Contradiction:

Improvesystem adaptabilityVSAvoidreceiver power management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The receiver device merges multiple sleep cycle requirements from different broadcast originators into a unified power management schedule. By combining and coordinating wake-up times for multiple services, the receiver can synchronize its low-power cycles across all monitored broadcast channels, reducing complexity while maintaining adaptability to different transmission intervals

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS10425890B2Low power mode in a satellite-based broadcast data service

Publication Date: 2019.09.24 HARRIS CORP

AI summary

A satellite system controller for a satellite system can comprise a receiving module, an interval selector, an epoch selector, and a scheduler. The receiving module can receive, from a transmission originator device, a set interval request message requesting the satellite system controller set a transmission interval and an epoch time for a satellite receiver, the transmission interval being an amount of time the satellite receiver is to remain in a sleep mode between expected transmissions and the epoch time being an instant at which the satellite receiver is to expect a satellite transmission. The interval selector can determine, based on the transmission interval, a sleep mode cycle for the satellite receiver. The epoch selector can select the epoch time according to the sleep mode cycle and the scheduler can schedule the satellite transmission with the satellite system at approximately the epoch time and according to the sleep mode cycle.