Energy Harvesting Uplink Scheduling with Adaptive Offset Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems often fail to consider the energy harvesting capabilities of energy harvesting (EH) devices when scheduling communications, leading to inadequate timing allocation and potential failure in transmitting scheduled signals due to insufficient energy.
Innovation Solution
EH devices inform the communication device of their EH capabilities by transmitting a second offset signal, allowing for adaptive allocation of communication timing based on their energy status, ensuring sufficient energy is harvested before transmitting scheduled signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the communication device schedules an EH device without considering its energy harvesting capability, then the scheduling process is simple and fast, but the EH device may fail to transmit the scheduled signal due to insufficient energy
Solution Approach 1:
The EH device transmits the second offset value to the communication device in advance, before the actual signal transmission. This preliminary action allows the communication device to know the energy harvesting status beforehand and adjust the scheduling accordingly, ensuring the EH device will have sufficient energy when the signal needs to be transmitted.
Solution Approach 2:
The EH device provides feedback to the communication device about its energy harvesting capability by transmitting the second offset value. This feedback mechanism enables the communication device to adapt its scheduling decisions based on the actual energy status of the EH device, improving transmission reliability without excessive complexity.
2Productivity
If the EH device transmits a second signal indicating the second offset, then the energy allocation timing is optimized, but the signaling overhead increases
Solution Approach 1:
Instead of transmitting detailed energy status information or multiple parameters, the EH device transmits only the essential second offset value that directly indicates the timing adjustment needed. This localized information approach provides just enough quality of information to optimize communication efficiency without excessive signaling overhead.
3Reliability
If the communication device allocates sufficient time for energy harvesting, then the EH device can transmit signals reliably, but the overall communication productivity decreases
Solution Approach 1:
The offset value is made dynamic and adaptive rather than fixed. The EH device determines the second offset based on its actual energy harvesting status, and the communication device adjusts the scheduling accordingly. This dynamic approach allows the system to allocate just the right amount of time for energy harvesting in each case, ensuring reliability while maximizing overall communication productivity.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. The method may include an energy harvesting (EH) device receiving a first control signal that includes scheduling information for the EH device. The scheduling information may indicate a first set of resources for communicating a first signal and a first offset between receiving the first control signal and communicating the first signal. Further, the method may include transmitting, via a second set of resources, a second signal indicating a second offset between receiving the first control signal and communicating the first signal and communicating the first signal via the first set of resources based on the second offset.