Uplink Transmitter Switching Timelines for Multi-Band Continuity
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing uplink transmitter switching across multiple bands, particularly in 5G networks, as current schemes do not support dynamic carrier switching and simultaneous transmission with more than two transmitters, limiting data rate and spectrum utilization.
Innovation Solution
Implementing methods for uplink transmitter switching that allow for dynamic selection of carriers and simultaneous transmission across up to three or more bands, with restrictions on the number of simultaneous transmitters, using modified switching timelines and DCI triggers to facilitate efficient UL transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink transmitter switching is implemented between two bands, then data rate and spectrum utilization are improved, but transmission reliability deteriorates due to switching gaps and timing constraints
Solution Approach 1:
The patent applies preliminary action by receiving the second DCI before the switching gap starts, allowing the UE to prepare and configure the third band transmission in advance. This ensures the UE is ready to maintain transmission on the third band during the switching period without interruption, thus improving reliability while enabling dynamic switching for higher data rates.
Solution Approach 2:
The patent uses the third band as an intermediary carrier that allows continuous transmission during the switching period between first and second bands. The third band acts as a buffer or bridge, enabling the UE to maintain connectivity while transitioning transmitters, thereby resolving the contradiction between switching capability and transmission reliability.
2Productivity
If dynamic carrier switching is enabled across multiple bands, then spectrum utilization and UL capacity are enhanced, but device complexity increases due to multiple transmitters and switching management
Solution Approach 1:
The patent segments the transmission function by maintaining separate transmitter chains for different bands (first band, second band, and third band). Each transmitter can be independently controlled and switched, allowing the system to manage complexity through modular segmentation while achieving high UL capacity through parallel operations on multiple bands.
Solution Approach 2:
The patent implements dynamics by enabling the UE to dynamically switch between different band configurations based on real-time scheduling decisions. The UE can transition from one band to another or activate additional bands (up to three simultaneous transmissions) depending on network conditions, maximizing UL capacity while managing complexity through adaptive, on-demand configuration.
3Productivity
If simultaneous transmission on multiple bands is supported, then spectrum utilization is improved, but switching timeline constraints become more complex
Solution Approach 1:
The patent applies preliminary action by receiving the second DCI before the switching gap, giving the UE advance knowledge of the switching timeline. This allows the UE to pre-configure the third band transmission parameters and ensure proper timing alignment, simplifying the management of simultaneous transmission constraints while maximizing spectrum utilization across multiple bands.
Data Source
AI summary
Wireless communications with uplink transmitter (Tx) switching may include an optional user equipment (UE) capability that allows uplink (UL) transmission on a band with the number of Tx chains unchanged during the switching. One Tx chain may be maintained on the band during UL switching. The optional UE capability may include modifications to the switching timeline. For example, an UL transmission on a third band may be made during UL Tx switching between two other bands.