Supplementary Uplink Carrier Activation Detection for 5G Coverage
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently providing services, particularly in achieving effective uplink data transmission in 5G communication systems, especially in ultra-high frequency bands where path loss and coverage issues are significant.
Innovation Solution
The proposed solution involves user equipment (UE) that can determine, based on downlink control information (DCI) received from a base station, whether a supplementary uplink (SUL) carrier is activated or inactivated. This determination allows the UE to select the appropriate carrier for uplink data transmission, thereby improving coverage and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If uplink data transmission is performed in ultra-high frequency bands (mmWave) to achieve high data rates, then data rate is improved, but path loss increases and coverage distance decreases
Solution Approach 1:
The patent combines multiple frequency bands by configuring both a first uplink carrier and a supplementary uplink (SUL) carrier. The SUL carrier operates in a lower frequency band with better propagation characteristics, while the first carrier operates in ultra-high frequency band for high data rates. This merging of different frequency band characteristics allows the system to simultaneously achieve high data rates and extended coverage by transmitting uplink data through both carriers.
2Length of stationary object
If a supplementary uplink (SUL) carrier is configured to extend coverage, then coverage distance is improved, but device complexity increases due to multi-carrier management
Solution Approach 1:
The user equipment automatically determines which carrier to use for uplink data transmission based on pre-configured information about the first uplink carrier and SUL carrier. The UE autonomously selects the appropriate carrier without requiring complex real-time network control or manual configuration, thereby reducing the operational complexity of multi-carrier management while still achieving extended coverage through the SUL carrier.
3Productivity
If dynamic carrier selection is implemented to optimize transmission, then transmission efficiency is improved, but processing overhead increases due to DCI analysis
Solution Approach 1:
The network pre-configures information about both the first uplink carrier and the SUL carrier before uplink data transmission occurs. This preliminary configuration includes carrier characteristics and selection criteria. When uplink data needs to be transmitted, the user equipment can quickly determine the appropriate carrier by analyzing downlink control information (DCI) against these pre-configured parameters, thereby reducing real-time processing overhead while maintaining transmission efficiency.
Data Source
AI summary
A user equipment for transmitting and receiving a signal in a wireless communication system may include a transceiver configured to receive, from a base station, downlink control information (DCI), and at least one processor configured to, based on a configuration state of a supplementary uplink (SUL) carrier indicated to the user equipment by the base station, determine whether information indicating activation or inactivation of the SUL carrier is present in the DCI, and based on a result of the determining of whether the information indicating activation or inactivation of the SUL carrier is present, determine a carrier to transmit uplink data scheduled by using the DCI.