TD-BWP Switching in Carrier Aggregation for Power-Latency Balance
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Solution Overview
Problem
Existing UE power management mechanisms in carrier aggregation networks fail to balance power consumption and latency effectively, particularly when UE is in a low-data activity state, leading to increased delays and retransmissions.
Innovation Solution
Implementing a TD-BWP switch mechanism for each component carrier based on UE traffic conditions, such as block error rate, number of retransmissions, and traffic type, using padding bits or predetermined messages to adjust bandwidth parts dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE stays in BWP #2 for sparse PDCCH monitoring to save energy, then power consumption is reduced, but latency increases due to delays and retransmissions
Solution Approach 1:
The patent implements dynamic BWP switching that adapts the monitoring behavior based on real-time traffic conditions. The UE transitions between BWP #1 (dense monitoring) and BWP #2 (sparse monitoring) depending on whether data activity is detected, allowing the system to optimize between power saving and latency performance based on actual network conditions rather than using a fixed configuration
Solution Approach 2:
The patent changes the monitoring parameters by switching between different BWP configurations. BWP #1 is configured with dense PDCCH monitoring occasions for low latency, while BWP #2 uses sparse monitoring for power saving. The system dynamically adjusts which BWP is active based on traffic conditions, effectively changing the monitoring density parameter to resolve the contradiction
2Productivity
If the UE switches between TD-BWPs dynamically based on traffic conditions, then data transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the UE monitors traffic conditions and uses this information to trigger BWP switching decisions. The system continuously evaluates data activity levels and adjusts the BWP configuration accordingly, creating a closed-loop control system that optimizes transmission efficiency while keeping the complexity manageable through rule-based decision logic
Solution Approach 2:
The patent segments the monitoring behavior into distinct BWP configurations, each optimized for specific traffic conditions. BWP #1 handles high data activity with dense monitoring, while BWP #2 handles low or no data activity with sparse monitoring. This segmentation allows the UE to switch between pre-defined behaviors rather than implementing complex continuous optimization, reducing overall device complexity
Data Source
AI summary
Some aspects of this disclosure relate to apparatuses and methods for implementing time domain bandwidth part (TD-BWP) switch for carrier aggregation (CA) for balancing between the UE power consumption and a latency of the UE. For example, the UE includes one or more transceivers configured to wirelessly communicate with a base station on a plurality of component carriers (CCs) in a carrier aggregated (CA) network. The UE also includes a processor communicatively coupled to the one or more transceivers. The processor is configured to perform a time domain bandwidth part (TD-BWP) switch on a first CC of the plurality of CCs when the UE and the base station are communicating on the first CC. The processor is further configured to perform the TD-BWP switch on a second CC of the plurality of CCs when the UE and the base station are communicating on the second CC.