Mobile Station Idle Mode Paging Optimization
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Solution Overview
Problem
In wireless communication systems based on the IEEE 802.16m standard, the existing methods for idle mode operation result in significant paging overhead and increased power consumption due to the transmission of paging group identifier information even when there are no targets to page, leading to inefficient resource utilization.
Innovation Solution
A method and apparatus are introduced to support idle-mode operations in superframe-based wireless communication systems by determining whether the current paging group is identical to the previous one, allowing the Mobile Station (MS) to selectively receive or ignore paging advertisement messages, and performing location updates only when necessary, thereby reducing unnecessary message transmissions and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the MOB_PAG-ADV message is always transmitted in the paging listening interval to notify paging group identifier information, then the paging group identifier information is reliably delivered to MSs, but the transmission overhead increases and power consumption rises
Solution Approach 1:
The patent implements periodic paging advertisement message transmission only when necessary. The BS determines whether to transmit the MOB_PAG-ADV message based on whether there are paging targets and whether paging group identifier information needs to be notified. This periodic transmission approach replaces the continuous transmission, reducing power consumption while maintaining reliability when needed.
Solution Approach 2:
The patent extracts the paging group identifier notification function from the MOB_PAG-ADV message. When there are no paging targets, the BS can notify paging group identifier information through other means (such as system broadcast information) without transmitting the full MOB_PAG-ADV message, thereby reducing transmission overhead and power consumption while maintaining notification reliability.
2Loss of information
If the MOB_PAG-ADV message is transmitted even when there are no paging targets, then paging group identifier information is notified to MSs, but the transmission overhead increases
Solution Approach 1:
The patent separates the paging group identifier notification function from the MOB_PAG-ADV message structure. When there are no paging targets, only the essential paging group identifier information is transmitted through streamlined mechanisms rather than the complete MOB_PAG-ADV message, reducing transmission overhead while ensuring information delivery.
Solution Approach 2:
The patent implements conditional transmission of paging advertisement messages. The BS periodically assesses whether paging group identifier notification is needed and only transmits messages when necessary, reducing the quantity of transmitted data while maintaining information delivery reliability.
3Reliability
If the MS continuously monitors paging messages to ensure it doesn't miss any paging targets, then paging reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic paging listening intervals for the MS. Instead of continuous monitoring, the MS wakes up at predetermined intervals to check for paging messages and then returns to idle state. This periodic monitoring approach maintains paging reception reliability while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The patent uses feedback mechanisms where the MS checks paging indicators and only processes full paging messages when indicated. This feedback-based approach allows the MS to maintain reliability by detecting when paging information is present while minimizing energy consumption by avoiding continuous message processing.
Data Source
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AI summary
A method and apparatus for supporting an idle mode of a Mobile Station (MS) in a superframe-based wireless communication system are provided. In a method for operating an MS to support an idle mode in a superframe-based wireless communication system, a paging listening interval is determined based on a Broadcast CHannel (BCH) information Transmit (TX) interval. BCH information including paging information is received during the paging listening interval. The inclusion/non-inclusion of a paging advertisement (MOB_PAG-ADV) message is detected based on the BCH information.