NR V2X Sidelink BWP Switching Across Different Numerologies
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Solution Overview
Problem
Existing wireless communication systems face challenges in minimizing latency and delay times during bandwidth part (BWP) switching in sidelink (SL) and Uu communication, particularly in V2X scenarios, which affect the efficiency of UE operations.
Innovation Solution
A method and apparatus for wireless communication that involves transmitting a random access preamble, receiving a response message, and configuring BWPs with different numerologies to ensure seamless SL communication, including handling Uu and SL BWP configurations to minimize latency and delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If BWP switching is performed in SL and Uu communication, then communication flexibility and adaptability are improved, but latency and delay time increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple BWPs with different numerologies before communication needs arise. The UE is provided with a first BWP configuration for SL communication and a second BWP configuration for Uu communication in advance, allowing rapid switching without lengthy configuration delays when communication conditions change.
Solution Approach 2:
The patent implements dynamics by enabling the UE to dynamically switch between different BWP configurations based on communication conditions. The system allows the UE to select and switch between the first BWP (with first numerology) and second BWP (with second numerology) depending on whether SL or Uu communication is needed, providing adaptive flexibility while maintaining low latency through pre-configured options.
2Reliability
If different numerologies are configured for Uu BWP and SL BWP, then communication performance for specific services is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the communication configuration into distinct BWP segments - a first BWP configured for SL communication with specific numerology and a second BWP configured for Uu communication with different numerology. Each BWP is independently configured and optimized for its specific communication type, allowing the UE to handle multiple communication requirements without overwhelming complexity.
Solution Approach 2:
The patent implements local quality by optimizing each BWP configuration for its specific communication purpose. The first BWP is tailored with numerology suitable for SL communication while the second BWP is tailored with numerology optimized for Uu communication, allowing each segment to have the specific properties needed for its function rather than using a uniform configuration.
3Productivity
If BWP switching is performed rapidly, then communication efficiency is improved, but delay time during switching increases
Solution Approach 1:
The patent resolves this contradiction by performing preliminary configuration of multiple BWPs with different numerologies before switching is needed. The UE receives and stores both the first BWP configuration (for SL) and second BWP configuration (for Uu) in advance, enabling instantaneous or near-instantaneous switching between them without requiring time-consuming reconfiguration, thus maintaining high communication efficiency while minimizing switching delay.
Data Source
AI summary
A method by which a first device performs wireless communication and a device for supporting same are provided. The method can comprise the steps of: transmitting a random access preamble to a base station; receiving, from the base station, a random access response message related to the random access preamble; transmitting, to the base station, a radio resource control (RRC) setup request message on the basis of the random access response message; receiving, from the base station, an RRC setup message as a response to the RRC setup request message; and receiving, from the base station, an RRC message including a setup related to a Uu bandwidth part (BWP) and a setup related to a sidelink (SL) BWP, wherein first device cannot perform SL communication through the SL BWP on the basis of the fact that the numerology of the Uu BWP and the numerology of the SL BWP are different.