5G NR BWP Switching Timing for Sidelink Communication
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Solution Overview
Problem
In 5G NR communication systems, the transition between different bandwidth parts (BWPs) for sidelink and uplink/downlink operations causes time delays, degrading system performance due to the need for BWP switching, which involves resetting parameters like bandwidth and subcarrier spacing.
Innovation Solution
A method and system for managing BWP switching by providing timing information from a base station to user equipment, allowing for optimized BWP transitions based on traffic load and service requirements, thereby minimizing delays and improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If BWP switching is performed to enable sidelink communication, then communication flexibility is improved, but time delay increases
Solution Approach 1:
The base station pre-configures multiple BWPs for the UE, including dedicated sidelink BWP and uplink/downlink BWP. The UE maintains these BWPs in advance, so when sidelink communication needs to be activated, the UE can quickly switch to the pre-configured sidelink BWP without performing full parameter reconfiguration, thereby reducing switching delay while maintaining communication flexibility
Solution Approach 2:
The patent implements dynamic BWP switching where the UE can flexibly transition between different BWPs based on communication needs. The base station provides BWP switching timing information that allows the UE to dynamically adjust its operating bandwidth part, enabling adaptive switching between sidelink and uplink/downlink modes while optimizing the timing of transitions to minimize disruption
2Productivity
If BWP switching timing is optimized for sidelink activation, then sidelink communication efficiency is improved, but uplink/downlink communication may be delayed
Solution Approach 1:
The base station monitors the communication status and traffic requirements, then provides appropriate BWP switching timing information to the UE. This feedback mechanism allows the base station to optimize switching timing based on current network conditions, balancing sidelink activation needs with uplink/downlink communication requirements to prevent delays in either direction
Solution Approach 2:
The patent employs periodic BWP switching patterns where the UE alternates between sidelink BWP and uplink/downlink BWP according to predetermined timing information provided by the base station. This periodic switching ensures that sidelink communication gets dedicated time slots while uplink/downlink communication is restored in subsequent periods, preventing permanent delays in either communication type
Data Source
AI summary
A disclosure of the present specification provides a method for switching a bandwidth part (BWP) for sidelink communication. The method may comprise the steps of: receiving information on BWP switching timing from a base station; and performing BWP switching on the basis of the information on BWP switching timing. The information on BWP switching timing may include first BWP switching information or second BWP switching information. The first BWP switching information may be time information about BWP switching from a sidelink (SL) to an uplink (UL) or a downlink (DL) with the base station. The second BWP switching information may be time information about BWP switching to the sidelink (SL) from the uplink (UL) or the downlink (DL) with the base station.