Rapid Paging via Last-Call Sector and Channel Occupancy
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Solution Overview
Problem
In cellular wireless communication systems, existing zone-based paging schemes often unnecessarily occupy paging channels by sending page messages to all sectors in a mobile station's last registration zone, which can delay call setup and increase channel congestion, despite the potential for identifying the specific sector where the mobile station is likely located.
Innovation Solution
Implement a method that determines whether to make a 'rapid page attempt' in the sector where the mobile station's last call ended, based on elapsed time since the last call and paging-channel occupancy levels in other sectors within the zone, opting for zone-based paging if the rapid attempt is likely to fail or if channel occupancy is not high enough to justify the attempt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zone-based paging is used to page a mobile station, then the page message can be sent to all sectors in the mobile station's last registration zone, but this unnecessarily occupies paging channels and delays call setup
Solution Approach 1:
The patent applies local quality by differentiating paging behavior across different sectors. Instead of uniformly paging all sectors in a zone, the system identifies the specific sector where the mobile station is most likely located (based on last call location, time elapsed, and paging channel occupancy) and concentrates paging efforts there. This localized approach reduces unnecessary paging channel usage in other sectors while maintaining reliable page delivery to the target mobile station.
2Quantity of substance
If rapid page attempt is made in the last-call sector only, then paging-channel occupancy is reduced, but page delivery may be delayed if the mobile station has moved to a different sector
Solution Approach 1:
The patent implements dynamics by making the paging strategy adaptive rather than static. The system dynamically evaluates multiple factors including the time elapsed since the last call, current paging channel occupancy levels in different sectors, and the mobile station's last known location. Based on this dynamic assessment, the system determines whether to concentrate paging in the last-call sector or expand to multiple sectors, allowing flexible adjustment between reducing channel occupancy and ensuring reliable page delivery.
3Loss of energy
If paging channel occupancy is high in other sectors, then rapid page attempt becomes more beneficial, but requires additional monitoring and decision complexity
Solution Approach 1:
The patent applies preliminary action by pre-establishing monitoring mechanisms for paging channel occupancy across different sectors and pre-defining decision criteria for when to use rapid page attempts versus traditional zone-based paging. The system continuously monitors occupancy levels and maintains information about mobile station call patterns, enabling rapid decision-making without complex real-time analysis when a page is needed.
Data Source
AI summary
Exemplary methods and systems involve a determination of when a rapid page attempt should be made in the sector where a mobile station's last call ended, before zone-based paging is initiated. An exemplary method may involve a radio access network: (a) determining that a mobile station should be paged; (b) before sending the page, the RAN determining whether or not both: (i) a rapid page attempt to the mobile station is likely to succeed, wherein a last call of the mobile station ended in a sector within a first paging zone, and (ii) the rapid page attempt to the mobile station is likely to reduce paging-channel occupancy in the first paging zone; (c) if it is determined that both: (i) the rapid page attempt to the mobile station is likely to succeed and (ii) the paging-channel occupancy is above the threshold level in at least one other sector in the first paging zone, then the RAN making a rapid page attempt in the sector of the radio access network in which the last call ended; and (d) otherwise, the RAN using a zone-based paging scheme to page the mobile station.