Bandwidth Switching Method for 5G User Equipment
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Solution Overview
Problem
In 5G systems, User Equipment (UE) faces challenges in performing bandwidth switching consistently with network-side configurations during random access processes, leading to potential data loss due to inconsistent BWP activation or deactivation.
Innovation Solution
A bandwidth switching method for UE that determines whether to perform BWP switching based on the receipt of a BWP switching command alongside a random access completion message, ensuring the BWP switching process aligns with network-side configurations by discarding or utilizing timing advance and uplink grants as necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE performs BWP switching upon receiving a BWP switching command during random access process, then the BWP switching capability is improved, but data loss occurs due to inconsistent BWP activation between UE and network side
Solution Approach 1:
The patent applies preliminary action by checking whether the BWP switching command is received during an ongoing random access process before executing BWP switching. The UE determines the reception status of the random access completion message in advance, and based on this preliminary assessment, decides whether to perform BWP switching. This prevents the BWP switching operation that would cause data loss while maintaining the capability to switch BWPs when appropriate, thus resolving the contradiction between adaptability and reliability.
2Productivity
If the UE activates a new BWP according to BWP switching command during random access, then bandwidth utilization is improved, but communication failure occurs due to inconsistency with network side configuration
Solution Approach 1:
The patent implements feedback by continuously monitoring the reception status of random access completion messages and using this feedback to control BWP switching operations. The UE receives feedback information through the random access completion message and adjusts its BWP switching behavior accordingly. When the feedback indicates that random access is ongoing, the UE suppresses BWP switching to maintain consistency with the network side, thereby ensuring communication reliability while still enabling bandwidth utilization when conditions permit.
Data Source
AI summary
The embodiments of the disclosure provide a bandwidth switching method and a user equipment. The method includes: when a BWP switching command is received while successfully receiving the random access completion message of the non-contention-based random access process, determine the non-contention-based random access process has been completed successfully in accordance with random access completion message, and determine not to perform the BWP switching process, or perform the BWP switching process in accordance with the random access completion message and the BWP switching command.