5G NR BWP Configuration Alignment for Service Continuity
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Solution Overview
Problem
In 5G NR systems, inappropriate BWP configuration by the access network device can lead to service interruptions due to switching or changing of active BWPs, which is particularly problematic for mMTC terminals with limited capabilities and high power consumption.
Innovation Solution
A second access network device configures appropriate first configuration information for a terminal device based on first indication information from a first access network device, ensuring that the BWP configuration matches the terminal's current active BWP and transmission rate, thereby reducing service interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the access network device configures a BWP with a large bandwidth to support high data transmission rates, then the data transmission efficiency is improved, but the power consumption of the terminal device increases
Solution Approach 1:
The patent implements dynamic BWP configuration where the access network device can switch between different BWP configurations based on current service requirements. The terminal device receives BWP configuration information that includes multiple BWPs with different bandwidths, and the active BWP can be dynamically changed through indication information, allowing the system to adapt bandwidth usage to actual data transmission needs rather than using a fixed large bandwidth continuously.
Solution Approach 2:
The patent changes the bandwidth parameter of the BWP configuration based on service requirements. The access network device configures multiple BWPs with different bandwidth parameters (e.g., first BWP with larger bandwidth for high-rate services, second BWP with smaller bandwidth for low-rate services) and switches between them by changing the active BWP indication, thereby optimizing the balance between data transmission efficiency and power consumption.
2Adaptability or versatility
If the access network device frequently switches or changes the active BWP configuration, then the adaptability to different service requirements is improved, but service interruptions occur
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple BWP configurations including a first BWP and a second BWP with different bandwidth characteristics before service transitions are needed. When service requirements change, the access network device can immediately switch to the pre-configured appropriate BWP using indication information, avoiding service interruptions that would occur if BWPs had to be configured from scratch during transitions.
Solution Approach 2:
The patent provides beforehand cushioning by maintaining multiple BWP configurations in advance, including backup configurations. When the current active BWP needs to be changed, the terminal device already has alternative BWP configurations ready, which cushions against service interruptions during the transition process.
3Adaptability or versatility
If the terminal device supports the maximum cell bandwidth of 400 MHz to meet future service requirements, then the future adaptability is improved, but the device cost increases
Solution Approach 1:
The patent enables dynamic BWP configuration where the terminal device can adapt its operating bandwidth according to actual service needs. Instead of requiring the terminal to permanently support the full 400 MHz maximum bandwidth, the system dynamically configures appropriate BWP sizes (from smaller to larger bandwidths) based on current service requirements, allowing cost-effective terminals to achieve high bandwidth performance only when needed.
Solution Approach 2:
The patent makes the BWP configuration system universal by designing a flexible configuration mechanism that can accommodate various bandwidth requirements. The access network device can configure multiple BWPs with different bandwidths, and the terminal device can operate on different BWP configurations as needed, making a single terminal design capable of serving multiple service types with different bandwidth requirements.
Data Source
AI summary
A method includes a first access network device that sends first indication information to a second access network device. The first indication information indicates information about a current active BWP and/or transmission rate information of a terminal device on the first access network device. The second access network device determines information about a first-time active BWP and/or BWP configuration information of the terminal device on the second access network device based on the first indication information. The method may be used to enable the second access network device to determine the appropriate information about the first-time active BWP and/or the appropriate BWP configuration information of the terminal device on the second access network device. In this way, service interruption caused by switching of an active BWP is reduced, and/or service interruption caused by changing of a BWP configuration is reduced.