Multi-Band UL Switching Gaps for 5G NR Throughput
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Solution Overview
Problem
The mechanism for performing UL Tx switching across three or more bands is not clear, necessitating a specific mechanism to enhance UL throughput in 5G NR.
Innovation Solution
A terminal device with a wireless transceiver and processor that transmits UE capability information for dynamic UL transmission switching across three or more bands, setting a switching gap period, and performs UL transmission based on received setting information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic UL transmission switching across three or more bands is implemented, then UL throughput is improved, but transmission reliability deteriorates due to switching gaps
Solution Approach 1:
The terminal device reports UE capability information indicating the switching gap period in advance to the base station. The base station uses this pre-provided information to configure scheduling parameters and establish switching timing, ensuring that the reliability requirement is met before actual switching occurs. This preliminary action allows the system to prepare appropriate scheduling margins and avoid conflicts during the switching transition.
2Productivity
If switching gap period is reduced, then UL throughput is improved, but device complexity increases due to stricter timing control requirements
Solution Approach 1:
The system changes the parameter of switching gap period based on UE capability and network conditions. The terminal device provides capability information with indicated switching gap periods, and the base station selects appropriate gap lengths from predefined options (e.g., 35 µs, 140 µs, 210 µs). This parameter adaptation allows the system to optimize throughput while managing complexity by using discrete, manageable gap values rather than continuously adjusting timing.
3Adaptability or versatility
If multi-band UL Tx switching is implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The terminal device is designed to support multiple band combinations (e.g., FDD-NR and TDD-NR) through a unified switching mechanism. The UE capability information structure and base station scheduling procedures are designed to handle various band configurations universally, allowing the same basic switching framework to accommodate different band pairs without requiring separate complex control logic for each combination.
Data Source
AI summary
A terminal device of the present disclosure includes a wireless transceiver and a processor that transmits and receives a signal via the wireless transceiver. The processor transmits UE capability information including a capability indicating a period of a switching gap of dynamic uplink (UL) transmission switching across three or more bands. The processor receives setting information regarding the dynamic UL transmission switching. The processor performs the dynamic UL transmission switching on the basis of the setting information. The capability is set for each of band groups including three or more bands. When the processor performs the dynamic UL transmission switching, the processor does not perform UL transmission on any carrier in the period indicated by the capability.