Bandwidth Part Activation for Inactive State Data Transmission
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Solution Overview
Problem
Current user equipment (UE) systems face challenges in determining and applying a suitable Downlink Bandwidth Part (DL BWP) for receiving response information during inactive state data transmission, which is essential for efficient communication in high-frequency band networks.
Innovation Solution
The method involves configuring and activating a UL BWP for inactive state data transmission, and subsequently determining and applying a DL BWP associated with the UL BWP or using a common DL BWP provided by system information to receive response information, ensuring efficient data transmission and reduced energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the system operates in high frequency bands with operation bandwidth greater than 400 MHz, then the transmission rate is improved, but the device complexity increases because UE cannot support the full system bandwidth
Solution Approach 1:
The system bandwidth is divided into multiple Bandwidth Parts (BWPs), each with a narrower bandwidth that individual UEs can support. The gNB configures multiple BWPs for each UE, allowing the UE to operate on segmented portions of the total system bandwidth rather than requiring support for the full 400+ MHz bandwidth, thus resolving the contradiction between high transmission rate and limited UE bandwidth capability
Solution Approach 2:
The patent introduces a new dimension of operation by allowing UEs to activate multiple BWPs simultaneously across different frequency resources. This multi-dimensional bandwidth utilization enables UEs to achieve higher effective transmission rates by aggregating multiple narrower BWPs without requiring the UE to support the entire system bandwidth at once
2Productivity
If the UE monitors multiple BWPs simultaneously, then the transmission rate is improved, but the energy consumption increases
Solution Approach 1:
The UE dynamically activates and deactivates BWPs based on data transmission requirements. When data needs to be transmitted, the UE activates multiple BWPs to achieve high transmission rates. When no data transmission is needed, the UE deactivates BWPs and monitors only one BWP, thereby dynamically adjusting energy consumption to match actual productivity needs
Solution Approach 2:
The UE periodically evaluates whether data transmission is needed and adjusts its BWP activation state accordingly. This periodic switching between active and inactive states allows the system to achieve high transmission rates only when necessary, while reducing energy consumption during idle periods
3Use of energy by moving object
If the UE enters inactive state to reduce energy consumption, then the energy efficiency is improved, but the ability to receive response information becomes problematic
Solution Approach 1:
The gNB pre-configures multiple DL BWPs for the UE before the UE enters inactive state. These pre-configured BWPs include specific indicators that allow the UE to identify which DL BWP to monitor for response information. This preliminary configuration ensures that even in inactive state, the UE can reliably receive response information on the pre-designated DL BWP
Solution Approach 2:
The patent introduces BWP indicators as an intermediary mechanism that links the UL BWP used for data transmission to the corresponding DL BWP for receiving response information. These indicators act as mediators that allow the UE to determine the correct DL BWP for monitoring without requiring continuous active connection, thus maintaining reliability while in energy-saving inactive state
Data Source
AI summary
Provided in the present disclosure are a bandwidth configuration method and user equipment. The bandwidth configuration method is performed by user equipment (UE), and the UE is configured to support or allow inactive state data transmission. The method includes the following steps: after the UE enters an inactive state, if a required condition for inactive state data transmission thereof is fulfilled, the UE activating an uplink bandwidth part (UL BWP) for inactive state data transmission (IDT); and after transmitting uplink data, the UE receiving response information transmitted by a base station side.