Wireless Terminal Activation Control for Epidemic Routing Power Savings
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Solution Overview
Problem
In mobile wireless communication terminals using Epidemic Routing, continuous power-on is required for data relay and synchronization, leading to increased power consumption and reduced battery life, as terminals must constantly check for short-range wireless connectivity and exchange Summary Vector Messages.
Innovation Solution
A wireless communication terminal with a short-range wireless communication unit, data storage unit, and an activation control unit that synchronizes data by transmitting/receiving data with other terminals and activates the data synchronization unit at the same time as the target terminal, allowing for periodic activation and reduced power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication terminals continuously check for short-range wireless connectivity and monitor SVM exchanges to enable data relay transmission, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic activation of the data synchronization unit at predetermined intervals instead of continuous operation. The activation control unit wakes up the terminal from sleep mode at scheduled times to perform SVM exchange and data synchronization, then returns to sleep mode. This periodic action maintains data transmission capability while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The terminal stores data locally in the data storage unit before activation, and during each activation period, it proactively exchanges SVMs and synchronizes data with other terminals in advance. This preliminary data preparation and synchronization approach ensures data is ready for relay transmission when needed, eliminating the need for continuous connectivity checks.
2Reliability
If wireless communication terminals are kept power-on to relay and transmit data in ad-hoc mode, then data relay transmission capability is improved, but battery life decreases
Solution Approach 1:
The terminal operates in alternating sleep and activation cycles, remaining in low-power sleep mode for extended periods and only activating briefly at predetermined intervals to perform data synchronization and relay transmission. This periodic operation pattern maintains data relay capability while extending battery life by minimizing the duration of high-power consumption states.
Solution Approach 2:
The activation control unit autonomously manages the terminal's power state, automatically waking up at scheduled intervals to perform necessary data synchronization tasks and then returning to sleep mode without requiring continuous user intervention or external power management. This self-service approach optimizes battery usage while maintaining operational capability.
Data Source
AI summary
This wireless communication terminal is provided with: a short-range wireless communication unit; a data storage unit; a data synchronization unit that synchronizes data by using short-range wireless communications to transmit/receive to/from another wireless communication terminal data that is stored in the data storage unit; and an activation control unit that, at the same time as an activation target structure that is provided to the other wireless communication terminal is activated, activates an activation target structure that includes at least the data synchronization unit and causes the activation target structure to operate so as to synchronize data.