Wireless Device Packet Data Session Call Notification
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Solution Overview
Problem
CDMA wireless communications devices lack the ability to receive notifications for incoming circuit-switched calls while supporting packet data services, as initial CDMA standards did not facilitate simultaneous use of voice and packet data services, leading to a need for a solution that allows notification during active network connections.
Innovation Solution
A method and system for establishing a packet data session in a wireless communications device to support network connections to a packet-switched network, enabling the receipt of notifications for incoming circuit-switched calls through a voice message server, using techniques such as TCP sessions and SMS messaging, even during active network connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless communications device supports packet data services according to initial CDMA standards, then packet data connectivity is enabled, but the device cannot receive notifications for incoming circuit-switched calls during active packet data sessions
Solution Approach 1:
The patent segments the notification delivery mechanism by creating a separate notification session independent of the packet data session. The notification session uses dedicated control channels (FCCH, SCH, ACCH) to deliver call notifications, while the packet data session continues on data channels. This segmentation allows call notifications to be delivered without interfering with active packet data services, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent introduces a message server as an intermediary component that receives circuit-switched call notifications and forwards them to the wireless device during active packet data sessions. The message server acts as a mediator between the circuit-switched network and the packet-switched network, enabling notification delivery without requiring direct integration between the two network types, thus maintaining device functionality while enabling new capabilities.
2Ease of operation
If the device suspends packet data services to answer incoming voice calls, then voice call connectivity is ensured, but packet data connectivity is interrupted
Solution Approach 1:
The patent implements dynamic service management by allowing the device to flexibly switch between packet data and circuit-switched voice services based on incoming call notifications. Users can dynamically decide whether to suspend packet data services to take calls or continue packet data services and redirect calls to voicemail. This dynamic approach enhances ease of operation while maintaining overall network service productivity through intelligent service selection.
Solution Approach 2:
Instead of suspending packet data services to answer calls (traditional approach), the patent inverts the logic by allowing packet data services to continue running and providing users with the option to redirect calls to voicemail. This inversion enables packet data connectivity to be maintained during voice call events, improving both ease of operation and network service continuity simultaneously.
3Productivity
If the device continues packet data services during incoming calls, then network service continuity is maintained, but call notification delivery becomes complex
Solution Approach 1:
The patent segments notification delivery into distinct phases: pre-call notifications delivered via packet data channels during active sessions, and post-call notifications delivered via circuit-switched channels. This segmentation allows the device to maintain packet data service continuity while implementing a manageable notification delivery mechanism that adapts to the current service state, reducing overall system complexity.
Solution Approach 2:
The patent changes the delivery parameter of call notifications based on the active service state. When packet data services are active, notifications are delivered through packet data channels; when circuit-switched services are active, notifications use circuit-switched channels. This parameter change approach enables service continuity while managing notification delivery complexity through context-aware routing.
Data Source
AI summary
Systems and techniques are disclosed relating to wireless communications. The systems and techniques involve wireless communications wherein a packet data session may be established between a wireless communications device and a packet data serving node to support a network connection to a packet-switched network. The wireless communications device may be configured to receive a notification of an incoming call from a circuit-switched network even when the network connection is active.