UE Downlink-Only State Switching for Uplink Resource Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing uplink and downlink communications, particularly in dynamic spectrum sharing scenarios, leading to increased computing resources, latency, and power consumption.
Innovation Solution
Implementing dynamic waveform switching in user equipment (UE) and network units to transition between different waveform types for uplink communications, using common DCI sizes for blind decoding and indicator-based switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If dynamic waveform switching is implemented in UE and network units, then computing resources are reduced and power consumption decreases, but device complexity increases due to switching mechanisms
Solution Approach 1:
The patent implements dynamic waveform switching where the UE can switch between different waveform types (e.g., DFT-s-OFDM and CP-OFDM) based on received indicators from the network unit. This dynamic adaptation allows the system to optimize power consumption by selecting appropriate waveforms for different transmission conditions, directly resolving the contradiction between power efficiency and operational flexibility
Solution Approach 2:
The patent changes the waveform parameter dynamically through indicator-based switching. The network unit transmits indicators that trigger waveform type changes in the UE, allowing parameter optimization without permanent structural changes. This resolves the contradiction by enabling power-efficient operation through parameter adaptation rather than fixed complex hardware
2Device complexity
If blind decoding is performed with common DCI sizes, then computing resources are reduced, but measurement precision may be affected
Solution Approach 1:
The patent employs common DCI sizes for multiple waveform types, making the DCI structure universal across different waveform configurations. This allows the UE to perform blind decoding with a single DCI format regardless of the active waveform type, significantly reducing computing resources while maintaining decoding accuracy through the standardized structure
Solution Approach 2:
The network unit pre-configures DCI formats with common sizes before waveform switching occurs. This preliminary standardization ensures that when blind decoding is performed, the UE can use predetermined DCI structures, reducing real-time computing requirements while maintaining measurement precision through pre-validated formats
3Adaptability or versatility
If indicator-based waveform switching is implemented, then adaptability improves, but device complexity increases due to switching control mechanisms
Solution Approach 1:
The patent introduces indicators as intermediary signals from the network unit to control waveform switching in the UE. These indicators act as mediators that convey switching decisions without requiring complex direct control mechanisms, enabling adaptable waveform selection while keeping the switching control architecture relatively simple
Solution Approach 2:
The UE autonomously switches waveforms based on received indicators without requiring complex external control mechanisms. The indicator-based system enables the UE to self-adjust its waveform configuration, improving adaptability while minimizing the complexity of switching control infrastructure
Data Source
AI summary
Wireless communications systems, apparatuses, and methods are provided. A method of wireless communication performed by a user equipment (UE) includes transmitting, to a network unit, a scheduling request associated with uplink resources, receiving, from the network unit, an indicator indicating the UE to enter a downlink only state, monitoring for first downlink control information (DCI) without entering the downlink only state, wherein the DCI comprises an indicator of the uplink resources, and transmitting, to the network unit after the receiving the indicator indicating the UE to enter the downlink only state, one or more transport blocks (TBs) via the uplink resources.