BWP Switching RF Retuning Elimination in 5G Terminals
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Solution Overview
Problem
In 5G NR systems, the switchover between Band Width Parts (BWP) in wireless communications leads to Radio Frequency (RF) retuning, causing delays in data transmission and reduced spectral efficiency due to the assumption that RF retuning is always necessary upon BWP activation or deactivation.
Innovation Solution
A method where a terminal determines whether RF retuning is required based on predetermined rules regarding central frequency point and bandwidth size consistency between the current and target BWP, allowing for direct activation or deactivation without retuning when conditions are met, thereby preventing unnecessary switching intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal performs RF retuning when switching between BWPs, then the frequency tuning accuracy is improved, but the transmission delay increases and spectral efficiency decreases
Solution Approach 1:
The patent changes the parameter of RF retuning from being always performed to being conditionally performed based on comparing frequency parameters. The terminal compares the frequency parameter of the target BWP with the current BWP, and only performs RF retuning when the parameters differ, thus eliminating unnecessary retuning operations and reducing transmission delay while maintaining frequency tuning accuracy when needed.
2Measurement precision
If the terminal assumes RF retuning is always necessary upon BWP switching, then the frequency accuracy is maintained, but the spectral efficiency is reduced due to unnecessary switching intervals
Solution Approach 1:
The patent introduces a conditional parameter change mechanism where the RF retuning operation is modified based on frequency parameter comparison. By changing the state of RF retuning from mandatory to conditional, the system maintains frequency accuracy when switching between different frequency BWPs while eliminating unnecessary retuning intervals, thereby improving spectral efficiency.
3Device complexity
If the terminal deactivates the previous BWP when activating a new BWP, then the BWP management simplicity is improved, but the transmission reliability decreases due to potential data loss during switching
Solution Approach 1:
The patent applies preliminary action by comparing frequency parameters before executing the BWP switching operation. This preliminary comparison allows the terminal to determine whether RF retuning is necessary, and consequently whether to maintain or deactivate the previous BWP. This prevents premature deactivation that could cause data loss, while still maintaining simple BWP management through automated decision-making based on frequency parameter matching.
Data Source
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AI summary
Disclosed in the present invention are a channel transmission method and device, and a computer storage medium. The method comprises: a terminal determining that a transmission time corresponding to a first channel is a first instant, a bandwidth part (BWP) currently activated by the terminal being a first BWP; the terminal receiving first control information sent by a network device, the first control information comprising first indication information, the first indication information indicating that the BWP to be activated is a second BWP; and if the first BWP and the second BWP satisfy a preset rule, the terminal not transmitting the first channel at the first instant.