Network Device Wake-Up Identifier for 5G DRX Power Saving
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Solution Overview
Problem
The 5G New Radio (NR) system faces challenges in reducing terminal power consumption due to its high bandwidth and complex processing requirements, as existing power-saving methods from Narrow Band Internet of Things (NB-IoT) are not applicable, and there is a lack of effective solutions for optimizing Discontinuous Reception (DRX) cycles to minimize power consumption.
Innovation Solution
A method involving a network device that determines and transmits a wake-up identifier to terminals, generating a power saving instruction signal to instruct them to monitor the Physical Downlink Control Channel (PDCCH) during DRX cycles, allowing flexible configuration of time and frequency resources, and managing wake-up indication modes to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal performs blind detection of PDCCH at every PO position in NR system, then the terminal can reliably detect paging signals, but the terminal power consumption increases significantly
Solution Approach 1:
The network device performs preliminary action by determining in advance which terminals need to be awakened and generates power saving instruction signals before the DRX cycle begins. This allows terminals to receive advance notification and avoid unnecessary blind detection of PDCCH, thereby reducing power consumption while maintaining reliable paging signal detection.
Solution Approach 2:
The power saving instruction signal acts as an intermediary between the network device and the terminal. Instead of directly requiring the terminal to perform blind PDCCH detection at every PO position, the intermediary signal provides wake-up indication, allowing the terminal to selectively activate PDCCH monitoring only when necessary, thus resolving the contradiction between detection reliability and power consumption.
2Productivity
If the NR system uses complex processing technologies to support larger bandwidth and higher throughput, then the system capacity increases, but the terminal processing complexity and power consumption increase
Solution Approach 1:
The invention extracts the wake-up indication function from the complex PDCCH blind detection process. By separating the power saving instruction signal transmission from the main data transmission, the terminal only needs to process the simple wake-up indication before engaging in complex NR processing, thereby reducing overall processing complexity while maintaining high system throughput capability.
3Reliability
If the terminal wakes up periodically to detect paging signal at PO position, then the terminal can receive downlink data timely, but the battery life decreases due to frequent wake-ups
Solution Approach 1:
The network device performs preliminary determination of which terminals need awakening before the DRX cycle. By generating and transmitting power saving instruction signals in advance, the terminal can avoid unnecessary wake-ups and extend battery life while still ensuring timely data reception when actually needed.
Solution Approach 2:
The invention modifies the periodic wake-up behavior by introducing conditional wake-up indication. Instead of the terminal waking up at every fixed PO position periodically, the terminal now wakes up selectively based on the periodic power saving instruction signals received from the network, thereby extending battery life while maintaining data reception timeliness.
Data Source
AI summary
The present application discloses a signal transmitting and receiving method, a network apparatus, and a terminal, for reducing power consumption of terminals. The signal transmitting method comprises: a network apparatus determining a wake-up identifier of a terminal to be awakened, wherein the terminal is a terminal that needs to be awakened during a discontinuous reception (DRX) period, the wake-up identifier is a wake-up identifier configured by the network apparatus for at least one terminal to be awakened; and the network apparatus generating, according to the wake-up identifier, an energy saving instruction signal and transmitting the same, the energy saving instruction signal instructing the terminal to monitor a physical downlink control channel (PDCCH) during the DRX period.