Mobile Station Tune-Away Suppression via Inter-Network Interface
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Solution Overview
Problem
In cellular wireless networks, mobile stations engaging in voice communication over EV-DO networks experience delays when tuning away to check for queued voice-related page messages on other networks, leading to degraded communication quality due to queuing of data, which is not instantaneously delivered.
Innovation Solution
A wireless-communication system determines if a mobile station is engaged in a voice call and configures the secondary network to send page messages via an inter-network connection interface, such as IMS, preventing the mobile station from establishing an air-interface link with the secondary network, thus avoiding the need to tune away and ensuring continuous data delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile station tunes away from the EV-DO network to check for voice-related page messages on another network, then the mobile station can receive queued voice messages, but the data communication on the EV-DO network experiences delays and degradation
Solution Approach 1:
The patent introduces an intermediary mechanism where the mobile station sends a suppression indication message to the EV-DO network entity before tuning away to check for voice messages. This intermediary communication allows the EV-DO network to aware of the mobile station's intent to tune away, enabling the network to suppress or queue data transmissions appropriately, thus preventing data delivery failures while allowing the mobile station to check for voice messages on other networks
2Reliability
If the mobile station continuously monitors the forward paging channel for voice messages, then the mobile station can receive voice-related page messages promptly, but the mobile station cannot maintain continuous data communication on the EV-DO network
Solution Approach 1:
The patent applies preliminary action by having the mobile station send a suppression indication message to the EV-DO network entity before actually tuning away to monitor other networks for voice messages. This advance notification allows the EV-DO network to prepare for the upcoming tune-away event by suppressing data transmissions or queuing them for later delivery, thereby preventing data loss and ensuring continuous data communication despite the mobile station's temporary absence from the EV-DO forward paging channel
Data Source
AI summary
A wireless-communication system includes a first network and a second network (e.g., an EV-DO network and a 1xRTT network, respectively). A wireless-communication-system entity determines that a mobile station is engaged in a first type of communication (e.g., a voice call) via the first network. In response to making the determination, the entity configures the second network to send second-network data (e.g., 1xRTT page messages) to the mobile station via an inter-network connection interface.