Abstract: Communication networks and methods are disclosed that provide call delivery to a dual mode wireless device served by a wireless data network (e.g., WiFi/IMS network) and a wireless voice network (e.g., cellular network). A call control function in the wireless data network is adapted to receive a call to the dual mode wireless device. The call control function transmits a ping message to the dual mode wireless device over the wireless data network to determine if the device is available over the wireless data network for the call. If the call control function receives a response to the ping message from the device, then the call control function attempts to set up the call over the wireless data network. If the call control function does not receive a response to the ping message, then the call control function may attempt to set up the call over the wireless voice network.

Abstract: Systems and methods are disclosed for selecting a preferred foreign wireless network from a plurality foreign wireless networks. One embodiment of the invention comprises a home wireless network that includes an HLR and a managed roaming system coupled between the HLR and a plurality of foreign wireless networks. The managed roaming system receives registration messages for roaming subscribers being transmitted from the foreign wireless networks to the HLR. The managed roaming system monitors the number of registration messages received from the foreign wireless networks and forwards the registration messages to the HLR. The managed roaming system selects a preferred foreign wireless network based on the number of registration messages received from the foreign wireless networks over a time period. The managed roaming system then forwards subsequent registration messages from the preferred foreign wireless network to the HLR, and blocks registration messages from non-preferred foreign wireless networks.

Abstract: Systems and methods are disclosed for selecting a preferred foreign wireless network from a plurality foreign wireless networks. One embodiment of the invention comprises a home wireless network that includes an HLR and a managed roaming system coupled between the HLR and a plurality of foreign wireless networks. The managed roaming system receives registration messages for roaming subscribers being transmitted from the foreign wireless networks to the HLR. The managed roaming system monitors the number of registration messages received from the foreign wireless networks and forwards the registration messages to the HLR. The managed roaming system selects a preferred foreign wireless network based on the number of registration messages received from the foreign wireless networks over a time period. The managed roaming system then forwards subsequent registration messages from the preferred foreign wireless network to the HLR, and blocks registration messages from non-preferred foreign wireless networks.

Abstract: Communication networks and methods are disclosed that provide call delivery to a dual mode wireless device served by a wireless data network (e.g., WiFi/IMS network) and a wireless voice network (e.g., cellular network). A call control function in the wireless data network is adapted to receive a call to the dual mode wireless device. The call control function transmits a ping message to the dual mode wireless device over the wireless data network to determine if the device is available over the wireless data network for the call. If the call control function receives a response to the ping message from the device, then the call control function attempts to set up the call over the wireless data network. If the call control function does not receive a response to the ping message, then the call control function may attempt to set up the call over the wireless voice network.