Sidelink Bandwidth Part Reconfiguration for 5G V2X
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Solution Overview
Problem
Current 5G communication systems lack methods for reconfiguring bandwidth parts (BWP) for sidelink communication, which is essential for efficient V2X communications, as existing BWP configurations are not adaptable to varying terminal capabilities and communication requirements.
Innovation Solution
A method where a terminal requests configuration or reconfiguration of sidelink BWPs from a base station, which configures and transmits the necessary BWP information, allowing for one or more BWPs to be activated based on terminal capabilities and communication needs, enabling flexible sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If BWP configuration is fixed for sidelink communication, then device complexity is reduced, but adaptability to varying terminal capabilities and communication requirements deteriorates
Solution Approach 1:
The patent implements dynamic BWP configuration for sidelink communication, where the base station configures multiple BWPs and the terminal can switch between them based on communication requirements. This dynamic approach allows the system to adapt to varying terminal capabilities and service types (eMBB, URLLC, mMTC) while maintaining manageable complexity through base station control.
Solution Approach 2:
The patent changes key BWP parameters including bandwidth, subcarrier spacing, and cyclic prefix length according to different service requirements and terminal capabilities. By allowing parameter changes within configured BWPs, the system achieves adaptability without requiring complete reconfiguration, thus balancing versatility and complexity.
2Productivity
If multiple BWPs are activated simultaneously, then communication performance is improved, but resource overhead increases
Solution Approach 1:
The patent implements dynamic activation of BWPs based on service type and communication requirements. The terminal activates one or more BWPs from the configured set according to the active service type (eMBB, URLLC, or mMTC), allowing flexible resource utilization without permanently maintaining multiple active BWPs, thus balancing efficiency with resource overhead.
3Adaptability or versatility
If BWP reconfiguration is implemented for sidelink, then adaptability to service types is improved, but control signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by having the base station pre-configure multiple BWPs with different parameters (bandwidth, subcarrier spacing, cyclic prefix) before sidelink communication begins. The terminal stores these pre-configured BWPs and can quickly activate them based on service type without requiring extensive real-time reconfiguration signaling, thus reducing control overhead while maintaining adaptability.
Solution Approach 2:
The patent enables parameter changes within pre-configured BWPs based on service type requirements. The terminal adjusts parameters such as bandwidth and subcarrier spacing by activating different pre-configured BWPs rather than requesting full reconfiguration, thereby achieving service type adaptability with minimal additional signaling overhead.
Data Source
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AI summary
An operation method of a first terminal in a communication system is provided. The method includes transmitting, to a base station, a configuration request message requesting configuration of a sidelink (SL) bandwidth part (BWP) used for sidelink communication between the first terminal and a second terminal. A configuration information message is received including configuration information of the SL BWP from the base station. The sidelink communication is performed with the second terminal using one or more SL BWPs indicated by the configuration information and in response to determining that reconfiguration of the one or more SL BWPs is necessary, a reconfiguration request message is transmitted to the base station.