UE PDCP Duplication Preference Signaling for Battery Conservation
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Solution Overview
Problem
PDCP duplication in NR technology enhances data throughput and reliability but increases power consumption, particularly in scenarios where battery power is low or packet processing is inefficient, leading to unnecessary resource waste.
Innovation Solution
User Equipment (UE) is enabled to indicate preferences for activating or deactivating PDCP duplication to the base station using RRC signaling, MAC CE, or power headroom reporting, based on device conditions such as battery level or packet validity, allowing the base station to adjust transmission parameters for power conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication is enabled to improve data throughput and reliability, then service continuity and reliability are improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic activation and deactivation of PDCP duplication based on real-time network conditions and device state. The network entity receives indication information from the terminal about whether to activate PDCP duplication, and dynamically adjusts the duplication state accordingly. This dynamic approach allows the system to maintain high reliability when needed while reducing power consumption when duplication is not necessary, resolving the contradiction between reliability and energy usage.
2Reliability
If PDCP duplication is activated to send packets over two bearers, then reliability is enhanced, but processing overhead and power consumption increase
Solution Approach 1:
The patent applies partial action by selectively enabling PDCP duplication only when the terminal indicates it is needed and when network conditions warrant it. Instead of continuously activating duplication for all traffic, the system partially activates it based on specific conditions such as network reliability requirements and terminal battery status. This reduces the processing overhead while maintaining sufficient reliability for critical communications.
3Duration of action of stationary object
If PDCP duplication is continuously active to maintain service continuity, then service continuity is improved, but battery power is drained faster
Solution Approach 1:
The patent implements a feedback mechanism where the terminal monitors its battery status and network conditions, then sends indication information to the network entity about whether to activate PDCP duplication. The network entity uses this feedback to dynamically adjust the duplication state. When battery power is low, the terminal can indicate to deactivate duplication, preserving battery life while maintaining service continuity through single-bearer transmission when appropriate.
4Extent of automation
If the network entity entirely controls PDCP duplication activation, then network control is simplified, but terminal autonomy and power management capability are reduced
Solution Approach 1:
The patent enables the terminal to autonomously assess its own state (battery level, processing capability, network conditions) and make decisions about PDCP duplication activation by sending indication information to the network. This self-service approach allows the terminal to manage its own power resources and adapt to its specific conditions, while the network entity respects these decisions and configures duplication accordingly, enhancing terminal autonomy without compromising network control.
Data Source
AI summary
Embodiments herein provide a method performed by a user equipment (UE) for handling packet data convergence protocol (PDCP) duplication. In one embodiment, the method includes determining that a first criteria to deactivate the PDCP duplication is met based on a first device condition; and sending, to a base station, a first message indicating a first preference to deactivate the PDCP duplication. In other embodiment, the method also includes determining that a second criteria to activate the PDCP duplication is met based on a second device condition; and sending, to the base station, a second message indicating a second preference to activate the PDCP duplication.