Reduced Physical Layer Procedures for UE Power Saving
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Solution Overview
Problem
Current LTE user equipment (UE) does not optimize physical layer operations during power saving mode, leading to continued high energy consumption, as it performs full blind decoding and maximum MIMO layers for downlink and uplink transmissions, even when battery charge is low.
Innovation Solution
Implementing reduced physical layer procedures when a UE enters power saving mode, including reduced blind decoding, transport block size, MIMO layers, and channel state information feedback, which are negotiated between the UE and the network node through RRC signaling to conserve battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If full physical layer procedures are performed in power saving mode, then communication reliability is maintained, but energy consumption remains high
Solution Approach 1:
The patent implements dynamic adaptation of physical layer procedures based on power saving mode status. The UE and network node negotiate and switch between full and reduced physical layer procedures according to battery charge levels, making the system flexible and adaptive to changing power conditions while maintaining communication functionality
Solution Approach 2:
The patent changes physical layer parameters such as blind decoding count, MIMO layers, and transport block size based on power saving mode. By adjusting these parameters dynamically, the system reduces energy consumption while maintaining adequate communication reliability through negotiated parameter sets
2Use of energy by moving object
If reduced physical layer procedures are implemented, then energy consumption is reduced, but communication performance deteriorates
Solution Approach 1:
The patent applies partial action by implementing reduced physical layer procedures that perform only necessary functions at reduced levels. Instead of full blind decoding and maximum MIMO layers, the system performs reduced versions that consume less energy while maintaining basic communication functionality through negotiation between UE and network node
Solution Approach 2:
The system dynamically switches between full and reduced physical layer procedures based on power saving mode status. This dynamic adaptation allows the communication performance to be optimized for current power conditions while maintaining the ability to switch back to full performance when needed
3Productivity
If full blind decoding and maximum MIMO layers are performed, then data transmission rate is maximized, but battery life is reduced
Solution Approach 1:
The patent changes physical layer parameters including blind decoding count and MIMO layers based on power saving mode status. By adjusting these parameters dynamically, the system reduces energy consumption while maintaining adequate communication functionality through negotiation between UE and network node
Solution Approach 2:
The system periodically evaluates battery charge levels and transitions between full and reduced physical layer procedures. This periodic assessment allows the device to maximize data transmission rate when battery is充足 and switch to energy-saving mode when battery charge drops, thereby extending overall battery life
Data Source
AI summary
A user equipment can send a notification to a network node indicating that the user equipment is entering a battery saving mode of operation. Reduced physical layer procedures can be implemented based on reduced capabilities indicated by the user equipment. Reduced physical layer procedures can also be implemented based on the network node's reconfiguration of parameters to facilitate the activation of the reduced physical layer procedures. The user equipment can also send to the network node recommendations of reduced physical layer procedures.