Energy-Harvesting HARQ Feedback for Wireless Resource Allocation
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Solution Overview
Problem
Existing wireless communication systems do not effectively utilize energy harvesting information for optimizing feedback mechanisms, such as hybrid automatic repeat request (HARQ) acknowledgments, leading to inefficiencies in resource allocation and energy management.
Innovation Solution
Wireless communication devices transmit energy harvesting (EH) information to select configurations for periodic feedback, including HARQ-ACK, based on energy harvesting conditions, enabling more efficient resource utilization and energy management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional feedback mechanisms are used without energy harvesting information, then feedback transmission is performed regularly, but energy consumption increases and resource allocation becomes inefficient
Solution Approach 1:
The feedback mechanism transitions from static periodic transmission to dynamic transmission based on energy harvesting conditions. The WCD adjusts feedback transmission timing and resource allocation dynamically according to real-time energy availability, allowing the system to adapt its behavior to changing energy states rather than following a fixed schedule.
Solution Approach 2:
The system changes key parameters of feedback transmission including timing, frequency, and resource allocation based on energy harvesting information. By modifying these transmission parameters according to energy availability, the system optimizes the balance between energy consumption and communication effectiveness.
2Reliability
If feedback is transmitted frequently to maintain communication reliability, then communication quality improves, but energy consumption increases
Solution Approach 1:
The system introduces energy harvesting information as a feedback parameter that influences subsequent feedback transmission decisions. The WCD monitors its energy state and uses this information to modulate feedback transmission behavior, creating a closed-loop control mechanism that balances reliability requirements with energy conservation.
Solution Approach 2:
Instead of maintaining constant full-rate feedback transmission, the system applies partial action by transmitting feedback only when necessary based on energy availability. This allows the system to maintain adequate communication reliability while consuming less energy by avoiding redundant or unnecessary feedback transmissions.
3Productivity
If energy harvesting information is integrated into feedback mechanisms, then resource allocation efficiency improves, but system complexity increases
Solution Approach 1:
The feedback mechanism serves multiple functions simultaneously: it maintains communication reliability, reports energy harvesting status, and enables dynamic resource allocation. By combining these functions into a unified feedback framework, the system achieves improved resource allocation without requiring entirely separate mechanisms for each function.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device (WCD) may transmit an indication of energy harvesting (EH) information of the WCD. The WCD may transmit feedback on periodic resources, including one or more of a hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK) or an indication associated with a configuration, selected from a plurality of candidate configurations, the configuration selected based at least in part on the energy harvesting information. Numerous other aspects are described.