Uplink Signal Transmission Dynamic Scheme Switching
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Solution Overview
Problem
In next-generation radio communication systems, there is a need to support high-speed communication and large capacity, particularly in fifth-generation systems, where uplink signals cannot be appropriately received by base stations unless a suitable scheme between single carrier and multicarrier schemes is set for uplink communication.
Innovation Solution
Implementing a radio communication system that allows dynamic or semi-static switching between single carrier and multicarrier schemes for uplink communication, with the base station determining the appropriate scheme and notifying user equipment, enabling the use of OFDM or DFT-s-OFDM techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If OFDM is used for uplink communication to achieve high data rates, then communication speed and capacity are improved, but signal reception reliability deteriorates due to mismatched generation and decoding techniques between base station and user equipment
Solution Approach 1:
The patent implements dynamic switching between single carrier and multicarrier schemes for uplink communication. The base station determines the appropriate scheme based on user equipment capabilities and location, and notifies the user equipment to switch accordingly. This dynamic adaptation allows the system to achieve high data rates when conditions permit while maintaining signal reception reliability through proper scheme matching.
Solution Approach 2:
The patent changes the transmission scheme parameter between single carrier and multicarrier modes. By switching the modulation and multiple access scheme parameters based on channel conditions and user equipment capabilities, the system optimizes both communication performance and reception reliability without requiring separate hardware systems.
2Use of energy by moving object
If DFT-s-OFDM is used for uplink communication to suppress PAPR, then power efficiency is improved, but communication capacity is limited compared to OFDM
Solution Approach 1:
The patent enables dynamic switching between DFT-s-OFDM for power efficiency and OFDM for high capacity scenarios. The base station determines the optimal scheme based on user equipment location, capability, and channel conditions, allowing the system to achieve high data rates when conditions permit while maintaining power efficiency through proper scheme selection.
Solution Approach 2:
The patent changes the multiple access scheme parameter between single carrier and multicarrier modes. By switching the transmission scheme based on system requirements and channel conditions, the system can optimize power efficiency when using DFT-s-OFDM while achieving high communication capacity when using OFDM, without being constrained to a single mode.
3Device complexity
If a fixed single carrier scheme is used for uplink communication, then implementation complexity is reduced, but adaptability to different communication scenarios deteriorates
Solution Approach 1:
The patent implements a dynamic scheme switching mechanism where the base station determines the appropriate uplink communication scheme and notifies user equipment to switch between single carrier and multicarrier modes. This dynamic adaptation allows the system to handle diverse communication scenarios including different user locations, mobility conditions, and service requirements while maintaining manageable implementation complexity through centralized control.
Solution Approach 2:
The patent creates a universal uplink communication framework that can operate in both single carrier and multicarrier modes. The base station serves multiple functions by determining the optimal scheme, notifying user equipment, and managing the switching process, thereby providing adaptability across different communication scenarios without requiring separate dedicated systems for each mode.
Data Source
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AI summary
A user equipment according to one embodiment of the present invention includes a reception unit that receives signal waveform configuration information related to either or both of a multicarrier scheme and a single carrier scheme to be applicable in uplink communication from a base station, a setting unit that sets the received signal waveform configuration information, and a transmission unit that transmits an uplink signal in accordance with the set signal waveform configuration information.