Zero-Power Wireless Communication Scheduling Using Harvesting Feedback
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Solution Overview
Problem
Zero-power communication devices experience intermittent communication due to slow power harvesting at distances from network stations, leading to interrupted connections when stored power is depleted.
Innovation Solution
A method where a terminal device sends indication information about its power harvesting efficiency or time interval to a network device, allowing the network device to adjust communication parameters for reduced invalid transmissions, resource savings, and improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If zero-power terminal communicates at edge distance from network station, then communication coverage is extended, but power harvesting speed becomes too slow to sustain communication
Solution Approach 1:
The terminal device performs power harvesting in advance during periods when communication is not required or during idle time slots, accumulating energy reserves before communication events occur. This allows the terminal to have sufficient power stored for communication without requiring high instantaneous power harvesting speed at the time of communication.
2Reliability
If terminal device transmits data continuously, then communication reliability is maintained, but stored power is depleted quickly causing interruption
Solution Approach 1:
The terminal device transmits data in periodic intervals rather than continuously, allowing time for power harvesting between transmission events. The communication follows a periodic pattern where transmission occurs when power is sufficient, followed by idle periods for power accumulation, thus maintaining communication over extended durations without complete power depletion.
Solution Approach 2:
The terminal device dynamically adjusts its transmission behavior based on available power levels. When stored power is sufficient, communication occurs at normal frequency; when power becomes low, the device automatically reduces transmission frequency or enters sleep mode, optimizing the balance between communication reliability and power conservation.
3Productivity
If network device performs frequent scheduling and transmission, then communication performance is improved, but invalid transmissions increase when terminal lacks power
Solution Approach 1:
The terminal device provides feedback information to the network device about its power status and communication capability. Based on this feedback, the network device intelligently adjusts its scheduling decisions, reducing or canceling transmissions when the terminal lacks sufficient power, thereby eliminating invalid transmissions and conserving network resources while maintaining optimal communication performance when power is available.
Data Source
AI summary
A method for wireless communication, including: first indication information is sent, where the first indication information indicates a first parameter, and the first parameter is used to represent at least one of first power harvesting efficiency of a terminal device or a first time interval.