Syniverse Communications, Inc.

Aicent, Inc.

Xiaohua Yuan

Huiyue Xu

David Zhang

Zhihai Zhang

An interworking solution only requires that Greenfield LTE deploy the IWF and IMS AS, and set up the connections between their MME and IWF for the IMSI attach procedure. The solution uses an IMS client that can be installed on the roamer's devices. Thus once the roamer is attached to the LTE network together with IMSI attach via IWF function, and registered into the IMS system, the roamer can receive voice call and SMS by the original phone number, even though the LTE operator network does not support CSFB.

Circuit switch voice roaming to LTE network

A method and apparatus provide access to communication services using dynamically assigned user credentials. The method includes establishing a communication connection with a first communication network (such as GSM, UMTS, CDMA, or LTE networks) using a real user credential (e.g., a SIM, a USIM, or an R-UIM card or certificates) in a first communication module, utilizing the first communication connection to request the dynamically assigned user credential from a remote management system, and registering a second communication module into the second communication network. The second communication connection is then tethered to allow other devices to access the Internet or other network.

Method for data access using a dynamic SIM credential

Method of and system for data access over dual data channels with dynamic SIM credential

Method of and system for data access over dual data channels with dynamic sim credential

Growing community of inventors

Beijing, China

Xiaohua Yuan