5G NR Receiver Bandwidth Adaptation for Power and Retuning Control
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in receiver bandwidth adaptation, leading to increased power consumption and potential data loss due to unnecessary wide bandwidth reception and retuning delays, particularly in 5G and New Radio (NR) technologies.
Innovation Solution
Implementing adaptive receiver bandwidth mechanisms in wireless transmit/receive units (WTRUs) that allow for dynamic changes in bandwidth based on activity levels, using explicit acknowledgments and channel quality indicators, and incorporating retuning gaps to minimize power consumption and data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the receiver bandwidth is increased to improve data reception capability, then the data throughput is improved, but the power consumption increases
Solution Approach 1:
The receiver bandwidth is made dynamic rather than fixed, allowing the WTRU to adaptively change the bandwidth based on current activity conditions. The receiver can switch between wide bandwidth modes (for high throughput when needed) and narrow bandwidth modes (for power saving during idle periods), resolving the contradiction between maintaining high data throughput capability and reducing power consumption.
Solution Approach 2:
The bandwidth parameter of the receiver is changed based on activity conditions. The system monitors activity indicators and adjusts the receiver bandwidth parameter accordingly - using wider bandwidth when activity is detected and narrower bandwidth when idle, thereby optimizing the trade-off between throughput and power consumption.
2Use of energy by moving object
If the receiver bandwidth is changed dynamically to reduce power consumption, then the power consumption is reduced, but retuning delays occur causing data loss
Solution Approach 1:
The system performs preliminary actions by monitoring activity indicators and predicting when bandwidth changes will be needed. By anticipating activity patterns and preparing for bandwidth transitions in advance, the system minimizes the impact of retuning delays on actual data transmission, reducing both power consumption and data loss.
Solution Approach 2:
The system uses feedback from activity indicators to dynamically adjust bandwidth and monitor the effects of retuning operations. By continuously monitoring whether retuning causes data loss and adjusting the timing and frequency of bandwidth changes based on this feedback, the system optimizes the balance between power saving and maintaining data reception integrity.
Data Source
AI summary
A receiver bandwidth adaptation for radio access technologies (RATs) may be for a New Radio (NR) or 5G flexible RAT. A WTRU control channel (e.g., receiver) bandwidth may change, for example, based on monitoring a downlink channel for an indication using a bandwidth (BW) associated with a first BW configuration. The indication may include a signal to change the receiver BW. The WTRU may change the receiver BW associated with the first BW configuration to a second BW configuration when the WTRU receives the indication on a downlink (DL) channel. The WTRU may perform one or more measurements associated with the second BW configuration in response to the change of the receiver BW to the second BW configuration. The WTRU may transmit measurement information to a network entity. The WTRU may receive a DL transmission from the network using the second BW configuration.