Paging Reception in Multimode Wireless Networks
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Solution Overview
Problem
Class B mobile devices operating in non-DTM NMO-2 networks often miss CS voice calls and experience issues with packet-switched data services, particularly in GSM/GPRS/EDGE networks, due to the 'blind spot' in prior art solutions that fail to effectively combine CS and PS domain operations, leading to missed paging notifications.
Innovation Solution
The implementation of a method and apparatus that prioritize services on a mobile device to receive paging messages from one network while maintaining communication with another, allowing for simultaneous circuit-switched and packet-switched operations by scheduling evaluation events and assigning priorities to applications, enabling preferential paging reception over error-tolerant applications without suspending primary network interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Class B mobile devices operate in non-DTM NMO-2 networks to maintain packet-switched data services, then data connectivity is improved, but circuit-switched voice call reception deteriorates due to missed paging notifications
Solution Approach 1:
The system dynamically adjusts the operation mode of the wireless interface between circuit-switched and packet-switched modes based on incoming signal types. The interface can flexibly transition between NMO-2 (PS-only) and NMO-3 (both CS and PS) modes, allowing the device to maintain PS data services while periodically monitoring CS paging channels for voice calls, thus resolving the contradiction between data connectivity and voice call reception reliability
Solution Approach 2:
The device implements periodic evaluation events where it temporarily suspends packet-switched data reception to monitor circuit-switched paging channels. This periodic switching allows the device to maintain PS data services during normal operation while periodically checking for CS voice pages, ensuring both data connectivity and voice call reception without requiring continuous dual-mode operation
2Reliability
If the wireless interface continuously monitors both circuit-switched and packet-switched networks, then paging reception reliability is improved, but device complexity increases
Solution Approach 1:
Instead of continuously monitoring both CS and PS networks simultaneously, the device performs partial monitoring by temporarily suspending PS data reception only during specific evaluation events to check for CS paging messages. This partial action approach achieves adequate paging reception reliability without requiring full continuous dual-mode operation, thereby reducing device complexity and power consumption
3Reliability
If the device suspends packet-switched data reception to receive circuit-switched paging messages, then paging notification reception is improved, but data service continuity deteriorates
Solution Approach 1:
The device implements periodic evaluation events where PS data reception is temporarily suspended only for brief intervals to monitor CS paging channels. After checking for paging messages, the device resumes PS data services. This periodic interruption approach ensures reliable paging message reception while minimizing impact on data service continuity, as the suspensions are temporary and infrequent
Solution Approach 2:
The system performs preliminary checks during evaluation events to determine whether CS paging messages are present before fully suspending PS data services. By anticipating the need for CS monitoring at predetermined intervals, the device can proactively check for pages and quickly resume data services, thereby maintaining data service continuity while ensuring paging message reception
Data Source
AI summary
Methods and apparatus enabling a mobile device to receive paging notifications from multiple networks. In one embodiment of the present invention, a first device connected to a first network momentarily ignores the first network, to monitor a second network instead. The first device identifies and prioritizes a list of applications of the first network; the prioritized listing allows the first device to preempt one of its lower priority tasks to monitor the second network for paging messages instead. The described methods and apparatus enable e.g., GSM paging for Class B cellular devices which are connected to GPRS NMO-2 type networks. The Class B cellular device can ignore certain GPRS data (which is tolerant to error), to decode GSM paging channels, which would otherwise be missed.