2 results about "NAT traversal" patented technology

This invention provides a method for predicting call quality and a call quality prediction service apparatus. The method predicts the call quality between a first network communication device and a second network communication device. The method includes: when at least one of the following devices exists between the first and second network communication devices: a device for performing NAT traversal, a device for performing media transcoding, and a device for performing topology hiding; dividing the overall interval between the first and second network communication devices into independent intervals defined by the at least one device; and sequentially performing the call quality prediction for each independent interval by independently executing a transmission test, thereby completing the call quality prediction step between the first and second network communication devices.

This invention provides a network address translation (NAT) traversal method and apparatus, applied to a server. The server, responding to an inbound INVITE request from a client, obtains the client's identification information, which carries the client's network access type. The server determines the client's network access type based on the client identification information. When the network access type is determined to be a preset type, a public network dual-address candidate set is established and ice-lite marking is performed. Based on the public network dual-address candidate set and the ice-lite marking, connection information is determined and sent to the client. Correspondingly, the client receives the connection information sent by the server and establishes a connection with the server based on the public network connection address and the server's ice-lite interactive connection establishment protocol, completing the NAT traversal. This method reduces communication maintenance costs, avoids introducing additional media relay delays, reduces increased call latency and bandwidth consumption, and improves communication quality.