Paging Message Absolute Time for Access Terminal Wake-Up
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Solution Overview
Problem
In existing paging technologies, the inability to determine the absolute time when an access terminal shifts from a connected state to an idle state leads to missed paging messages, particularly in scenarios where a Connection Close message is not sent or the radio link is exceptionally disconnected, causing target access networks to fail in calculating the correct wake-up time for monitoring paging messages.
Innovation Solution
Incorporating the absolute time when the access terminal shifts from a connected state to an idle state into the paging message, allowing target access networks to calculate and send the paging message at the correct time, ensuring that the access terminal is not missed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the paging message does not carry the absolute time when the AT shifts from connected state to idle state, then the paging message structure remains simple, but the target AN cannot calculate the correct wake-up time in special scenarios, leading to missed paging
Solution Approach 1:
The patent applies preliminary action by having the network entity determine and carry the absolute time when the AT shifts from connected state to idle state in the paging message before the AT actually wakes up. This ensures that the target AN has all necessary information (absolute time, period, wake-up offset) already available to calculate the correct wake-up time without needing to rely on the AT sending a Connection Close message or other subsequent communications. The absolute time is determined in advance and embedded in the paging message structure.
2Reliability
If the target AN relies on the AT sending a Connection Close message with absolute time, then the information can be obtained in normal disconnection scenarios, but the system fails in exceptional disconnection scenarios where the radio link is lost and no Connection Close message is sent
Solution Approach 1:
The patent introduces an intermediary mechanism where the network entity (source AN or network controller) acts as a mediator that determines the absolute time when the AT shifts from connected to idle state and carries this information directly in the paging message. This intermediary approach eliminates the need for the AT to send a Connection Close message with the absolute time, thereby solving the problem of information loss in exceptional disconnection scenarios where the radio link is lost and no such message can be transmitted.
3Loss of information
If the paging message carries all available periods of the AT but not the absolute time, then the message size remains controlled, but the target AN cannot calculate the wake-up time in scenarios where the AT does not send Connection Close or exceptional disconnection occurs
Solution Approach 1:
The patent applies preliminary action by having the network entity determine and embed the absolute time when the AT shifts from connected state to idle state directly in the paging message before transmission. This ensures that the paging message contains all necessary information (absolute time, period, wake-up offset) for the target AN to calculate the correct wake-up time without needing additional messages or assumptions, thereby achieving information completeness while keeping the message size controlled through efficient encoding.
Data Source
AI summary
A method for paging access terminals. The method includes: a network entity sends a paging message to a target AN. The paging message carries the information required for calculating the time when the AT wakes to monitor the paging message. The information includes the absolute time that is determined according to the time when the AT previously shifts from the connected state to the idle state. Upon receipt of the paging message, the target AN determines when to send the paging message to the AT according to the information carried in the paging message. The present embodiments also disclose a system and apparatus for paging access terminals. The apparatus is a network entity that sends the paging message. The method, system and apparatus can be used to determine the time when the AT wakes to monitor the paging message, thus ensuring that the AT paging is not missed.