Dynamic Paging Occasion Adjustment for Unlicensed Spectrum Delays
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Solution Overview
Problem
In mobile communications, the indeterminacy of paging message sending periodicity due to unsuccessful Listen Before Talk (LBT) monitoring in unlicensed spectra leads to delays and increased power consumption in terminal devices, as they cannot receive paging messages effectively.
Innovation Solution
A method where terminal devices and network devices adjust the correspondence between paging occasions and groups based on paging indication information, allowing flexible determination of paging occasions for message receipt and transmission, reducing delays and power consumption by optimizing message delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device cyclically receives paging messages at fixed paging occasions determined by protocol, then the terminal device can reliably receive paging messages, but when LBT monitoring fails in unlicensed spectrum, the paging message cannot be sent and the terminal device experiences delays and increased power consumption
Solution Approach 1:
The patent makes the paging occasion dynamic by allowing the network device to indicate a first paging occasion for a first paging group that differs from the second paging occasion determined by protocol for the second paging group. This dynamic adjustment enables flexible paging message delivery when LBT monitoring succeeds or fails, resolving the contradiction between reliable reception and delivery delay.
Solution Approach 2:
The patent changes the paging occasion parameter based on LBT monitoring results. When LBT fails, the network can indicate an alternative first paging occasion for certain paging groups, allowing paging messages to be sent at different times than protocol-specified occasions, thus maintaining reliability while reducing delays.
2Reliability
If the terminal device performs blind detection at multiple paging occasions to increase successful paging message reception opportunities, then paging message reception reliability improves, but power consumption increases due to multiple detection attempts
Solution Approach 1:
The patent applies local quality by differentiating treatment for different paging groups. The first paging group receives paging messages at a network-indicated first paging occasion, while the second paging group uses the protocol-determined second paging occasion. This localized differentiation allows the terminal device to avoid blind detection at unnecessary occasions, reducing power consumption while maintaining reliability.
Solution Approach 2:
The network device provides feedback to the terminal device about which paging occasion to monitor by indicating the first paging occasion for the first paging group. This feedback mechanism eliminates the need for the terminal device to perform blind detection at multiple occasions, reducing power consumption while ensuring reliable paging message reception.
3Ease of manufacture
If the network device sends paging messages at protocol-determined paging occasions, then the system maintains standardized operation, but when LBT monitoring is unsuccessful, the paging message cannot be effectively sent to terminal devices
Solution Approach 1:
The patent segments paging groups into a first paging group and a second paging group with different paging occasion determination methods. The first paging group uses network-indicated occasions while the second uses protocol-determined occasions. This segmentation allows the system to maintain standardized operation for some groups while improving reliability for others through flexible occasion indication.
Solution Approach 2:
The patent creates a universal paging system that can operate in both standardized mode (protocol-determined occasions) and flexible mode (network-indicated occasions). The network device can selectively apply different paging occasion determination methods based on LBT monitoring results, providing multi-functionality that maintains ease of implementation while improving delivery reliability.
Data Source
AI summary
A paging message sending and receiving method and apparatus, the method including receiving, by a terminal device, paging indication information from a network device, where the paging indication information indicates whether at least one paging group needs to receive a paging message, and determining, by the terminal device based on the paging indication information, a paging occasion on which a paging group in which the terminal device is located receives the paging message.