Dynamic Bandwidth Part Allocation for Wireless Battery Conservation
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Solution Overview
Problem
The increasing demand for higher bandwidth in wireless networks while maintaining battery life of mobile devices poses a challenge, as power usage increases with multiple carrier aggregation, leading to potential network overload and reduced battery runtime.
Innovation Solution
A method and system for managing Bandwidth Parts (BWP) in wireless networks based on the remaining battery life of wireless devices, where different thresholds trigger the assignment of full, intermediate, or lowest supported BWPs for Primary and Secondary Cells to balance bandwidth usage and conserve battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple carriers are used for carrier aggregation to increase data transmission, then bandwidth and data throughput are improved, but power consumption increases and battery runtime decreases
Solution Approach 1:
The patent applies dynamics by making the bandwidth allocation dynamic based on battery status. The system continuously monitors battery charge levels and adjusts the number of active carriers and bandwidth parts accordingly. When battery charge is high, more carriers are activated for higher throughput; when battery charge is low, fewer carriers are active to conserve power. This dynamic adaptation resolves the contradiction by allowing the system to optimize between throughput and power consumption in real-time based on energy availability.
Solution Approach 2:
The patent changes the parameter of bandwidth allocation (number of carriers and bandwidth parts) based on battery charge parameters. By establishing threshold-based rules that map battery charge levels to specific carrier aggregation configurations, the system adjusts bandwidth utilization as a function of energy state. This parameter change strategy allows the system to maintain high throughput when energy is abundant while reducing power consumption when energy is scarce, effectively resolving the technical contradiction.
2Productivity
If full Bandwidth Part is assigned to Primary and Secondary Cells for high bandwidth, then data transmission capacity is improved, but battery life is reduced
Solution Approach 1:
The patent applies partial action by assigning only the necessary bandwidth parts rather than always using full bandwidth. Based on battery charge thresholds, the system selectively activates full BWP, partial BWP, or minimal BWP configurations. This partial activation strategy ensures that the device uses only the bandwidth needed for current data requirements while preserving battery life, resolving the contradiction between maximizing bandwidth utilization and extending battery operation duration.
Solution Approach 2:
The system dynamically adjusts bandwidth part allocation in response to changing battery charge levels. As the device operates and battery charge depletes, the system transitions from full BWP assignment to partial BWP and eventually to minimal BWP or single-carrier mode. This dynamic bandwidth adjustment ensures that bandwidth capacity is optimized at each stage of battery discharge, allowing high throughput when battery life remains and reducing bandwidth to conserve energy when battery life is critical.
3Productivity
If multiple carriers are aggregated to handle high network load, then network capacity is improved, but network overload risk increases
Solution Approach 1:
The patent implements feedback mechanisms where the system continuously monitors both network conditions and device battery status to adjust carrier aggregation configurations. This feedback loop allows the network to respond to changing conditions by activating or deactivating carriers appropriately, preventing network overload while maintaining adequate capacity. The system uses threshold-based decision rules that automatically adjust network resource allocation based on real-time conditions, resolving the contradiction between maximizing network capacity and maintaining network stability.
Data Source
AI summary
Systems and methods are provided for managing bandwidth while conserving battery in a wireless network. The methods include manipulating BWPs for the PCell and the one or more SCells based on the remaining battery life of the wireless device. With high remaining battery life, BWP sizes do not need to be restricted. With lower remaining battery life, the BWP sizes are restricted in an incremental way depending on the remaining battery life.