US Patent No. 9,401,888


Patent No. 9,401,888
Issue Date July 26, 2016
Title Internet Protocol Mapping Resolution In Fixed Mobile Convergence Networks
Inventorship Tricci So, San Diego, CA (US)
Zaifeng Zong, Nanjing (CN)
Xiaoyun Zhou, Nanjing (CN)
Yifeng Bi, Nanjing (CN)
Assignee ZTE Corporation, Shenzhen (CN) ZTE (USA) Inc., Austin, TX (US)

Claim of US Patent No. 9,401,888

1. A method of facilitating operation of a communication device in Fixed Mobile Convergence (FMC) architecture having a first
internet protocol (IP) address in a first network and a second IP address in a second network, comprising:
detecting a presence of a network address translation (NAT) table;
implementing, when the NAT table is present, a message exchange protocol on a femto base station or a security gateway to
obtain a mapping between the first IP address and the second IP address, wherein the message exchange protocol comprises:

obtaining the mapping via an encryption key exchange, wherein IP addresses and associated port numbers are included in a message
exchanged in the encryption key exchange, and

selectively notifying the mapping to a femto base station management server based on presence of the femto base station management
server; and

reporting, in a communication message, the mapping between the first IP address and the second IP address to a mobility management
entity (MME).