Network-Aided Power Savings for Wireless Communication Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face inefficiencies in power management, as user equipment (UE) independently adjusts power levels without timely network feedback, leading to unnecessary high power usage and shortened battery life, and potential mismatches in downlink channel transmissions and receiving rank.
Innovation Solution
Implementing network-aided power savings techniques where a base station transmits capability indicators to UEs, allowing them to adjust power levels and receiving ranks in advance of transmissions based on anticipated downlink throughput, thereby optimizing power usage dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If UE independently adjusts power levels without network feedback, then power savings may be achieved, but delays occur in power adjustments and mismatches in downlink channel transmissions and receiving rank
Solution Approach 1:
The base station transmits capability indicators to the UE, providing network feedback about downlink channel conditions and anticipated throughput. This feedback enables the UE to adjust its power level and receiving rank in advance of actual transmissions, eliminating delays associated with independent monitoring while maintaining optimal power consumption.
Solution Approach 2:
The base station sends capability indicators that allow the UE to perform preliminary power and rank adjustments before actual downlink transmissions occur. This preliminary action based on network-provided capability information ensures that power savings are achieved without waiting for independent UE monitoring, resolving the time delay issue.
2Productivity
If UE operates at high power levels in connected mode, then downlink throughput may be maximized, but battery life is shortened
Solution Approach 1:
The UE dynamically adjusts its power level based on received capability indicators from the base station. Instead of operating at fixed high power levels, the UE modulates its power consumption according to actual downlink channel conditions and anticipated throughput, maintaining productivity when needed while conserving battery life during low-activity periods.
Solution Approach 2:
The capability indicator transmitted by the base station contains information about downlink channel quality and anticipated throughput. The UE uses this information to change its operating parameters (power level, receiving rank) to match actual network conditions, ensuring optimal throughput is achieved only when channel conditions warrant high power operation.
3Productivity
If UE uses more receive paths, then downlink throughput capacity increases, but power consumption increases
Solution Approach 1:
The base station transmits capability indicators that include information about the maximum scheduled rank (receiving rank). The UE adjusts its receiving rank parameter based on this information, using more receive paths only when the network indicates high downlink throughput capacity is available, thereby matching resource usage to actual network capabilities.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Methods, systems, and devices for wireless communications are described. One method may include an eNB estimating a downlink data volume on a communication channel based on downlink data throughput indicators, generating a capability indicator based on the estimated downlink data volume, and communicating the capability indicator to the UE to trigger a power saving mode. Another method may include a UE receiving a capability indicator and adjusting at least one UE power saving parameter in advance of an expected receive transmission based on the capability indicator. Yet another method may include an eNB receiving an indication of a UE state and modifying a downlink scheduled rank based on the received indication.