Dynamic Uplink Carrier Switching for 5G Bandwidth Optimization
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently managing bandwidth and carrier aggregation for 5G wireless devices, particularly in scenarios where devices need to switch between different bandwidth parts and carriers to optimize data transmission, leading to suboptimal performance and increased power consumption.
Innovation Solution
The implementation of dynamic uplink transmission switching mechanisms that allow wireless devices to dynamically switch between configured carrier pairs and bandwidth parts based on real-time traffic conditions and network configurations, optimizing the use of available bandwidth and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless devices use fixed carrier aggregation configurations, then device complexity is reduced, but adaptability to changing traffic conditions deteriorates
Solution Approach 1:
The patent implements dynamic carrier aggregation where the network can switch between different carrier aggregation configurations based on real-time traffic conditions. The UE is configured with multiple carrier aggregation setups including primary cell (PCell) with secondary cells (SCells), and can dynamically activate/deactivate specific SCells. This dynamic reconfiguration allows the system to adapt to varying traffic demands while managing device complexity through network-controlled automation.
Solution Approach 2:
The system changes key parameters such as carrier frequency, bandwidth part (BWP), and SCell activation state based on traffic conditions. The network can switch between different carrier aggregation configurations by modifying these parameters, enabling adaptability to different traffic scenarios (e.g., high data rate vs. low latency requirements) without requiring complete reconfiguration of the device.
2Productivity
If wireless devices dynamically switch between carriers, then data transmission efficiency is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) and periodic activation/deactivation of SCells based on traffic patterns. Instead of continuously monitoring all configured carriers, the UE can enter sleep mode during periods with no or low traffic and only activate carriers when needed. This periodic action maintains high data transmission efficiency during active periods while significantly reducing power consumption during idle periods.
Solution Approach 2:
The system extracts and activates only the necessary SCells based on current traffic requirements, rather than keeping all configured carriers active. When traffic conditions change, the network can deactivate less critical SCells while maintaining essential connections, thereby reducing power consumption while preserving adequate data transmission capability.
3Measurement precision
If wireless devices monitor multiple bandwidth parts, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The patent implements bandwidth part (BWP) configuration where different BWPs are optimized for specific functions. One BWP can be configured for wide bandwidth to capture strong signals and improve measurement precision, while another BWP can be configured for power-saving operation. The UE switches between these locally optimized BWPs based on traffic conditions and signal quality, achieving accurate measurements when needed while conserving energy during normal operation.
Data Source
AI summary
A wireless device comprises one or more processors and memory storing instructions. When executed by the one or more processors, the instructions cause the wireless device to receive one or more radio resource control, RRC, messages indicating: a plurality of band pairs for uplink switching; and whether each band pair, of the plurality of band pairs, is configured with uplink switching based on dual uplink or configured with uplink switching based on switched uplink. The instructions cause the wireless device to transmit, based on a first band pair, of the plurality of band pairs, being configured with dual uplink: a first uplink transmission via a first band of the first band pair; and a second uplink transmission via a second band of the first band pair.