Paging Frame Grouping and Adaptive SSB Periodicity for Deep Sleep
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Solution Overview
Problem
The challenge of high power consumption in network nodes due to frequent paging operations, even when user equipment is not in the coverage area, is exacerbated by denser networks and larger bandwidths, leading to inefficiencies in energy usage and increased operational expenses.
Innovation Solution
Grouping of paging frames and occasions within a cycle, along with adaptive Synchronization Signal Block (SSB) periodicity, allows network nodes to enter deep sleep mode more frequently, reducing unnecessary wake-ups and conserving energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network node performs paging periodically throughout a time interval, then the paging capacity and coverage are maintained, but the power consumption of the network node increases significantly
Solution Approach 1:
The patent implements discontinuous reception (DRX) cycles where the network node alternates between active paging periods and sleep periods. During active periods, paging frames and occasions are transmitted; during sleep periods, the node conserves energy. This periodic on-off operation maintains paging capacity while significantly reducing average power consumption compared to continuous paging.
Solution Approach 2:
The patent segments the paging cycle into multiple paging frames (PF0, PF1, PF2, PF3) within a DRX cycle, where not all frames need to be transmitted every cycle. By dividing the paging capacity across multiple segmented frames and allowing some to be skipped during sleep periods, the system maintains overall paging capability while reducing instantaneous and average power consumption.
2Reliability
If the network node wakes up periodically to perform paging, then user equipment can be paged reliably, but the network node cannot enter deep sleep mode to save energy
Solution Approach 1:
The patent employs DRX cycles with configurable lengths where the network node periodically wakes up to transmit paging frames and then enters deep sleep mode. The periodic wake-up schedule is optimized to maintain paging reliability for all UEs while maximizing sleep duration to minimize energy loss. This creates a rhythm of active-sleep operations that balances reliability and energy efficiency.
Solution Approach 2:
The patent dynamically adjusts the number of paging frames transmitted within each DRX cycle based on network conditions and UE distribution. The system can adaptively determine whether to transmit all paging frames (PF0-PF3) or skip some frames to extend sleep periods, making the paging operation flexible and dynamic rather than fixed, thereby optimizing the trade-off between reliability and energy loss in real-time.
3Area of stationary object
If paging frames are distributed throughout the time interval, then paging coverage is maintained, but the network node must remain active longer preventing deep sleep mode
Solution Approach 1:
The patent merges multiple paging frames (PF0, PF1, PF2, PF3) into concentrated transmission bursts at the beginning of DRX cycles rather than distributing them evenly throughout the entire time interval. By combining paging transmissions into early-cycle bursts, the network node completes its paging coverage obligation quickly and can enter deep sleep mode for the remainder of the cycle, thereby extending the sleep duration while maintaining full paging coverage capability.
Solution Approach 2:
The patent uses periodic DRX cycles where paging frames are transmitted in concentrated bursts at specific periodic intervals (at the start of each cycle) rather than continuously distributed. This periodic concentration of paging activity allows the network node to achieve full paging coverage during the active burst and then immediately transition to deep sleep mode, optimizing the balance between coverage area and active duration.
4Reliability
If the network node transmits paging in every frame, then no paging messages are lost, but power consumption increases due to inability to enter sleep mode
Solution Approach 1:
The patent implements periodic DRX cycles with multiple paging frames per cycle, where the network node transmits paging messages during active periods and remains in sleep mode during inactive periods. This periodic transmission pattern ensures that paging messages are delivered reliably during active cycles while allowing the node to conserve significant energy during sleep cycles, reducing overall power consumption compared to continuous transmission.
Solution Approach 2:
The patent segments paging transmission into discrete paging frames (PF0, PF1, PF2, PF3) within DRX cycles, allowing selective transmission of these segments based on network conditions. By segmenting the paging capability across multiple frames and cycles rather than requiring every frame to transmit, the system can skip certain segments during sleep periods while maintaining overall reliable delivery, thereby reducing power consumption while preserving message delivery reliability.
Data Source
AI summary
A method is disclosed for reducing power consumption during paging reception. The method includes identifying, by a UE, one paging frame of a plurality of paging frames or one paging occasion of a plurality of paging occasions in a paging frame, the plurality of paging frames being continuous in time instances in a beginning of a paging cycle, and the plurality of paging occasions being continuous in time instances in a beginning of the paging frame, and receiving, from a network node by the UE, a paging message in at least one paging frame of the plurality of paging frames or at least one paging occasion of the plurality of paging occasions. The plurality of paging frames includes a legacy paging frame and a non-legacy paging frame, and the plurality of paging occasions includes a legacy paging occasion and a non-legacy paging occasion.