Sidelink Bandwidth Part Switching for Consistent 5G NR Activation
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Solution Overview
Problem
Current 5G NR systems lack a unified method for activating or deactivating sidelink bandwidth parts (BWPs) between terminals, leading to inconsistent understanding and increased packet loss due to inefficient data transmission.
Innovation Solution
A method for activating or deactivating sidelink BWPs based on configuration information or indications from the network side device or peer terminal, ensuring consistent understanding and efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic and flexible bandwidth allocation is implemented by dividing system bandwidth into multiple BWPs, then access of narrow band terminals and power saving mode are supported, but device complexity increases due to the need to manage and switch between multiple BWPs
Solution Approach 1:
The patent implements dynamic BWP switching where the terminal can activate and deactivate SL BWPs based on communication needs. The network device sends activation/deactivation indications to dynamically control which SL BWP is active, allowing the system to adapt bandwidth allocation in real-time while managing complexity through centralized control signaling.
Solution Approach 2:
The patent changes the state parameter of SL BWP from static to dynamic by introducing activation and deactivation states. The terminal switches between different SL BWPs by receiving indication information that changes the active BWP parameter, enabling flexible bandwidth adaptation without permanently configuring all possible BWPs.
2Reliability
If SL BWP activation/deactivation is not unified, then terminal and network device understanding becomes inconsistent, but implementing unified activation/deactivation methods increases system complexity
Solution Approach 1:
The patent implements a feedback mechanism where the terminal sends activation confirmation information back to the network device after receiving an activation indication. This feedback loop ensures that both the terminal and network device have consistent understanding of the SL BWP activation state, resolving the inconsistency problem through verified state synchronization.
Solution Approach 2:
The patent uses indication information as an intermediary signaling mechanism between the network device and terminal. This intermediary carries the activation/deactivation commands and ensures that both parties operate based on the same state information, achieving unified control without requiring complex direct coordination protocols.
3Adaptability or versatility
If multiple SL BWPs are configured with different numerologies and bandwidths, then support for diverse communication requirements is improved, but the difficulty of configuring and managing these BWPs increases
Solution Approach 1:
The patent segments the sidelink bandwidth into multiple independent SL BWPs, each with its own numerology and bandwidth characteristics. This segmentation allows different portions of the spectrum to be configured with different parameters optimized for specific communication requirements, while the network device manages each segment independently through separate indication information.
Data Source
AI summary
A bandwidth part activation or deactivation method includes: determining to activate or deactivate an SL BWP according to one of following: configuration information of a Uu BWP and configuration information of the SL BWP; or receipt of an activation or deactivation indication sent by a network side device or a peer terminal, or receipt of activation or deactivation confirmation information sent by the network side device or the peer terminal, where the activation or deactivation confirmation information is feedback information of an activation or deactivation request sent by the network side device or the peer terminal for the terminal.