Discontinuous Reception Wakeup with Multiple Component Carriers
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in discontinuous reception mode with carrier aggregation, as all component carriers are often configured with the same settings, leading to unnecessary power consumption and latency due to simultaneous monitoring and activation of all carriers.
Innovation Solution
A user equipment (UE) receives a wakeup signal that provides a carrier aggregation wakeup configuration, allowing it to selectively activate secondary cells only when necessary, reducing power consumption and latency by monitoring a control channel based on the configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all component carriers are configured with the same settings in discontinuous reception mode, then the system maintains simplicity in configuration management, but power consumption increases and latency occurs due to simultaneous monitoring and activation of all carriers
Solution Approach 1:
The patent segments the component carriers into different groups (first set and second set of component carriers) with different discontinuous reception configurations. This allows selective monitoring where only certain carriers are monitored during DRX on-duration while others remain in sleep mode, thereby reducing power consumption without requiring complete reconfiguration of all carriers.
Solution Approach 2:
The patent introduces dynamic configuration where the network can indicate different DRX parameters for different component carriers based on traffic conditions. The UE can dynamically adjust which carriers to monitor and for how long, transitioning between active and sleep states selectively for each carrier group, optimizing power consumption in real-time.
2Reliability
If all component carriers are monitored simultaneously in discontinuous reception mode, then the system ensures no data is missed, but latency increases due to simultaneous activation of all carriers
Solution Approach 1:
The patent divides component carriers into separate groups with different monitoring schedules. The first set of component carriers is monitored during the DRX on-duration while the second set is monitored after a delay or in a different time window. This segmentation reduces activation latency for urgent data while maintaining reliability through staggered monitoring of all carriers.
Solution Approach 2:
The patent implements preliminary monitoring of high-priority component carriers during the DRX on-duration before activating other carriers. This allows the UE to detect and process time-sensitive control information or data early, reducing latency for critical communications while other carriers are activated subsequently.
3Productivity
If all component carriers are activated simultaneously, then the system achieves maximum throughput, but power consumption increases unnecessarily when transmission may not occur on all carriers
Solution Approach 1:
The patent implements dynamic carrier activation where the UE activates only the necessary set of component carriers based on network indications and traffic conditions. The network can signal which carriers should be active, allowing the UE to dynamically adjust its active carrier set to match actual transmission needs, achieving near-maximum throughput when required while conserving power when full carrier activation is unnecessary.
Solution Approach 2:
The patent applies different operational characteristics to different component carriers based on their specific roles and traffic patterns. High-priority carriers with frequent traffic maintain higher activity levels, while lower-priority carriers use more aggressive sleep modes. This local optimization allows the system to achieve high throughput on critical carriers while reducing overall power consumption.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may operate in a discontinuous reception mode, receive configuration signaling configuring the UE with a quantity of carrier aggregation wakeup configurations, as well as receive, while operating in a discontinuous reception mode, a wakeup signal using at least one component carrier. The UE may identify a configuration indicator indicating a first carrier aggregation wakeup configuration of the quantity of carrier aggregation wakeup configurations based on the wakeup signal, and identify a second component carrier based on the first carrier aggregation wakeup configuration. Upon identifying the second component carrier, the UE may monitor a control channel of the second component carrier based on the first carrier aggregation wakeup configuration.