BWP Adjustment Method for 5G NR Terminal Power Optimization
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Solution Overview
Problem
Conventional bandwidth part (BWP) adjustment methods in 5G NR systems result in unnecessary overheads and power consumption for terminal devices due to inefficient switching between different bandwidths during data transmission.
Innovation Solution
The proposed solution involves a network side device sending indication information to a terminal device to dynamically adjust its operating BWP based on the size of the data volume to be received or sent, thereby reducing unnecessary overheads and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device switches between narrowband BWP and wideband BWP during data transmission, then the bandwidth adaptability is improved, but the switching overheads and power consumption increase
Solution Approach 1:
The network side device sends indication information in advance to notify the terminal device of upcoming BWP switching requirements. The terminal device prepares for the switch by configuring the target BWP parameters before actual data transmission begins, reducing the overhead of mid-transmission switching operations
Solution Approach 2:
The BWP configuration is made dynamic and adjustable based on real-time data transmission requirements. The terminal device can flexibly switch between narrowband and wideband modes depending on the data volume and transmission urgency, optimizing the balance between bandwidth utilization and power consumption
2Productivity
If the terminal device supports maximum 400 MHz bandwidth, then the system capacity is improved, but the terminal device cost and complexity increase
Solution Approach 1:
The total bandwidth is segmented into multiple BWPs of different sizes (narrowband and wideband). The terminal device only activates and processes the BWP size needed for current transmission requirements, rather than continuously supporting the full 400 MHz bandwidth, thus reducing device complexity while maintaining system capacity
Solution Approach 2:
Different parts of the bandwidth spectrum are allocated to different BWPs with different characteristics. The terminal device applies different processing qualities and resources to different BWP segments based on local transmission requirements, optimizing performance while reducing overall device complexity
3Reliability
If the terminal device monitors PDCCH subframe continuously, then the control channel reliability is improved, but the power consumption increases
Solution Approach 1:
The terminal device monitors PDCCH subframes periodically according to DRX cycles rather than continuously. During active periods, monitoring is performed at regular intervals to detect BWP indication information and control channel assignments, while during sleep periods monitoring is reduced or suspended, balancing reliability with power savings
Data Source
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AI summary
This application provides a BWP adjustment method and apparatus. A terminal device receives, in a first BWP, first indication information sent by a network side device, where the first indication information is used to indicate a second BWP to be used by the terminal device to receive and/or send data. The terminal device receives and/or sends the data in the second BWP. An operating BWP of the terminal device is dynamically adjusted, and therefore is more appropriate. In this way, unnecessary overheads and power consumption can be reduced.