PHR and CSI Reporting With Multiplexed Energy Status
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Solution Overview
Problem
Existing wireless communication systems face limitations in reporting energy information for energy harvesting devices, particularly in power headroom reports (PHR) and channel state information (CSI), which hinders efficient energy management and resource utilization.
Innovation Solution
Energy harvesting devices detect triggers such as rapid energy changes or explicit signaling to transmit PHR or CSI messages, with energy status information multiplexed within these reports, using reserved bits to indicate energy information and requests, improving resource utilization and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If energy information is reported separately from PHR and CSI, then energy status can be communicated, but resource utilization decreases and energy efficiency worsens
Solution Approach 1:
The patent combines energy information reporting with existing PHR and CSI reporting mechanisms by multiplexing energy status bits within the same uplink messages. This merging approach allows energy information to be communicated without requiring separate dedicated reporting resources, thereby improving resource utilization while maintaining complete energy status reporting.
Solution Approach 2:
The patent enables PHR and CSI messages to serve multiple functions simultaneously - traditional channel quality reporting plus energy status reporting. By making these existing messages universal carriers for both types of information, the system avoids creating separate specialized reporting channels, thus improving overall resource efficiency.
2Loss of information
If separate energy reporting mechanisms are implemented, then energy status can be tracked, but device complexity and signaling overhead increase
Solution Approach 1:
The patent merges energy status tracking into existing PHR and CSI reporting frameworks rather than creating separate mechanisms. This integration reduces device complexity by reusing existing reporting infrastructure and signaling pathways, while still achieving comprehensive energy status tracking through multiplexed information fields.
3Productivity
If energy information is multiplexed with PHR and CSI, then resource utilization improves, but measurement precision and reporting accuracy may be compromised
Solution Approach 1:
The patent applies local quality by allocating specific bit fields within the PHR and CSI messages dedicated to energy information. This localized allocation ensures that energy status data receives appropriate representation quality within the multiplexed structure, preventing degradation despite the combined reporting approach.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. An energy harvesting wireless device may accumulate energy during an energy harvesting state for use in subsequent operation. In some cases, the energy harvesting wireless device may detect a trigger, such as a change in an energy status of the energy harvesting wireless device or explicit control signaling from a network, for transmitting a power headroom report (PHR), channel state information (CSI), or both. The energy harvesting wireless device may transmit the message including one or more of the PHR or the CSI and indicating that energy information (e.g., an energy report, an energy request, or both) is multiplexed with the PHR, the CSI, or both. In some cases, the message may include control information such as a medium access control (MAC) control element (MAC-CE).