TDD Resource Scheduling for Wireless Energy and Information Transfer
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transferring both energy and information between energy transmitter and receiver devices, particularly in scenarios where energy signals and information signals collide or interfere.
Innovation Solution
A Time Division Duplex (TDD) framework is implemented for wireless energy and information transfer, where a TDD configuration is indicated to both energy transmitter and receiver devices, specifying a temporal arrangement of energy resources and information resources, including flexible resources that can be used for either energy or information transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If energy signals and information signals are transmitted in the same time interval, then transmission efficiency is improved, but signal collision and interference occur
Solution Approach 1:
The transmission time is segmented into distinct time intervals: energy transmission slots and information transmission slots. This temporal segmentation prevents signal collision by ensuring that energy signals and information signals are transmitted at different times, thereby resolving the contradiction between transmission efficiency and signal reliability
Solution Approach 2:
The system employs periodic time division duplex (TDD) configuration where energy transmission and information transmission occur in alternating periodic intervals. This periodic structure allows the system to achieve both efficient resource utilization and reliable signal transmission by systematically switching between energy and information modes
2Adaptability or versatility
If TDD configuration is dynamically adjusted based on energy storage requirements, then adaptability is improved, but system complexity increases
Solution Approach 1:
The system implements feedback mechanisms where the energy receiver reports its energy storage status to the energy transmitter. Based on this feedback, the TDD configuration is dynamically adjusted to allocate more energy transmission slots when energy storage is low and more information transmission slots when energy storage is sufficient. This feedback-driven approach achieves high adaptability while keeping the control mechanism relatively simple
Solution Approach 2:
The TDD configuration transitions from static to dynamic, allowing the system to adapt transmission slot allocation based on real-time energy storage conditions. This dynamic adjustment enables the system to optimize performance under varying energy availability while maintaining manageable complexity through standardized adjustment rules
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. An energy receiver may receive a first message that includes information indicative of a time division duplex (TDD) configuration for wireless energy and information transfer, the TDD configuration indicating a temporal arrangement of energy and information resources. In some examples, an energy transmitter may configure the TDD configuration as cell-specific, energy receiver-specific, or using a slot format indication (SFI). In addition, the TDD configuration may include flexible resources able to be used for energy or information transfer. The energy receiver may receive one or more energy signals during the energy resources in accordance with the TDD configuration, the one or more energy signals providing energy to the energy receiver. Accordingly, the energy receiver may transmit one or more information signals during the information resources in accordance with the TDD configuration.