SSB-to-Energy Resource Mapping for UE Energy Harvesting
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently supporting energy harvesting for user equipment (UE) due to the lack of mechanisms for determining which resources to use for energy transfer signals.
Innovation Solution
The implementation of a mapping between synchronization signal block (SSB) indices and energy transfer resources, allowing UEs to identify and monitor specific energy transfer resources for energy harvesting signals, and enabling the network to provide parameters for the waveforms of these signals to facilitate energy harvesting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a mapping mechanism between SSB indices and energy transfer resources is implemented, then UEs can efficiently identify and monitor energy transfer resources for energy harvesting, but the device complexity and system configuration overhead increase
Solution Approach 1:
The network pre-configures the mapping between SSB indices and energy transfer resources before the UE needs to harvest energy. This mapping relationship is established in advance through system information or RRC signaling, allowing the UE to directly utilize the pre-defined correspondence without performing complex real-time identification, thus resolving the contradiction between harvesting efficiency and device complexity
Solution Approach 2:
The SSB index serves as an intermediary that links the UE to specific energy transfer resources. Instead of requiring the UE to directly identify and monitor all possible energy transfer resources, the SSB index acts as a reference pointer that simplifies the resource identification process, reducing the computational burden on the UE while maintaining efficient energy harvesting capability
2Adaptability or versatility
If the network provides waveform parameters for energy transfer signals, then the UE can cancel signals to receive data on the same resources, but the loss of information increases due to potential interference
Solution Approach 1:
The network provides waveform parameters of energy transfer signals in advance to the UE. Using these parameters, the UE can generate a replica of the energy transfer signal and subtract it from the received composite signal before decoding the data. This preliminary anti-action removes the interfering energy transfer signal components, preventing information loss while enabling the UE to adaptively receive data on the same resources
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify common or UE-specific energy transfer resources that the UE may monitor for energy transfer signals. The UE may identify such energy transfer resources based on a mapping between synchronization signal block (SSB) indices and the energy transfer resources. The mapping may be a one-to-one mapping, or a one-to-many mapping. In a one-to-many mapping, subsets of each mapped set of energy transfer resources may correspond to different energy harvesting types, different energy charging rates, or different periodicities or power settings, among other examples. The mapping may be included in one or more standards documents, or may be configured at the UE via system information, control signaling, random access messages, or a combination thereof.