Waveform Switching Mechanism for Digital MMWAVE Repeaters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in optimizing waveform switching at repeater nodes to enhance link performance and adapt to varying conditions such as UE capabilities and channel conditions, which affects energy efficiency and spectral usage.
Innovation Solution
Implementing a method and apparatus for waveform switching between orthogonal frequency division multiplexing (OFDM) and single carrier (SC) waveforms at repeater nodes, allowing for dynamic switching based on link conditions, triggered by either the base station or user equipment, to improve link performance and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If OFDM waveform is used, then spectral efficiency is improved, but energy efficiency deteriorates
Solution Approach 1:
The system dynamically switches between OFDM and SC waveforms based on real-time link conditions, UE capabilities, and channel characteristics. The waveform switching is controlled by receiving indications from the base station and adjusting the waveform type accordingly, allowing the system to optimize between spectral efficiency (OFDM) and energy efficiency (SC) depending on current operational requirements.
2Use of energy by moving object
If SC waveform is used, then energy efficiency is improved, but spectral usage deteriorates
Solution Approach 1:
The system dynamically switches between OFDM and SC waveforms based on real-time link conditions, UE capabilities, and channel characteristics. The waveform switching is controlled by receiving indications from the base station and adjusting the waveform type accordingly, allowing the system to optimize between spectral efficiency (OFDM) and energy efficiency (SC) depending on current operational requirements.
3Adaptability or versatility
If waveform switching is implemented, then adaptability to varying conditions is improved, but device complexity increases
Solution Approach 1:
The base station acts as an intermediary that controls the waveform switching at the repeater node. The base station sends waveform switch indications to the repeater node, which then executes the waveform changes. This intermediary control approach enables adaptability while distributing the complexity burden to the base station, which has greater processing capabilities.
4Reliability
If dynamic waveform switching is implemented, then link performance is improved, but loss of time for switching increases
Solution Approach 1:
The system receives waveform switch indications in advance from the base station, allowing the repeater node to prepare for waveform transitions before they are needed. This preliminary action enables smoother transitions and reduces the actual switching time by having the necessary waveform configurations ready beforehand based on predicted link conditions.
Data Source
AI summary
A (repeater) node may identify a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a UE. A waveform switch associated with the first link may be triggered by the base station or the node. A waveform switch associated with the second link may be triggered by the node or the UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. The base station may transmit, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. The node may execute the waveform switch associated with the first link or the second link.