Targeted Paging Signaling Reduction in Mobile Networks
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Solution Overview
Problem
The existing 3GPP mobile communication networks face significant paging signaling load due to the need to send paging requests to all cells within a tracking area where a mobile device is registered, leading to inefficient use of air interface resources and high overhead, especially when the device is in an idle state and its location is only known at a granularity of a tracking area.
Innovation Solution
A communication node that identifies the need for paging a mobile device, obtains information about its previous locations and movement patterns, and dynamically defines sets of cells to send paging messages, allowing for targeted and reduced signaling by initiating transmissions in subsets of cells based on historical and mobility data, with the ability to adjust timing and cancel messages if a response is received.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paging requests are sent to all cells within a tracking area, then the mobile device can be reliably paged regardless of its specific location, but the signaling load and overhead on the air interface increases significantly
Solution Approach 1:
The tracking area is segmented into multiple cell groups based on historical location data and mobility patterns. Instead of paging all cells simultaneously, the system divides the paging task into smaller groups and pages them sequentially or in parallel subsets, reducing the number of active transmissions at any given time while maintaining comprehensive coverage.
Solution Approach 2:
The system performs preliminary analysis of historical location data and mobility patterns before initiating paging. This preliminary action identifies the most probable cell groups where the mobile device is likely to be located, allowing the system to prioritize paging in these areas first and avoid unnecessary paging in less likely areas.
2Reliability
If paging messages are transmitted to multiple cells simultaneously, then the probability of reaching the mobile device increases, but the radio resource usage and interference increases
Solution Approach 1:
The system dynamically adjusts the paging strategy based on real-time conditions including mobility patterns, historical data, and network state. Cell groups are dynamically selected and prioritized based on the likelihood of containing the mobile device, allowing flexible resource allocation that adapts to changing conditions rather than using static simultaneous paging of all cells.
Solution Approach 2:
The system employs periodic paging attempts in different cell groups rather than continuous simultaneous paging. Cell groups are paged in periodic cycles, allowing radio resources to be reused and reducing interference while maintaining the ability to reach the mobile device through repeated attempts across different time periods.
Data Source
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AI summary
The present invention provides a communication node for a communication network. The communication node includes means for identifying that paging is required for a mobile communication device, means for obtaining information identifying at least one cell in which said mobile communication device has been located previously and for obtaining further information relating to at least one of movement of the mobile communication device between cells and a time when said mobile communication device was located in said at least one cell, means for defining a set comprising at least one cell in which to seek said mobile communication device, based on said information and said further information, and means for initiating transmission of a respective paging message for said mobile communication device in each cell of said set.