| 摘要 |
<p>A carrier grade address translation (CGN) entity based data transmission method, a CGN entity, a gateway, and a system are provided. The CGN entity based data transmission method includes: determining, by a CGN entity, that data is transmitted between a first terminal of a first gateway and a second terminal of a second gateway (11); and sending, by the CGN entity, IP addresses of the first terminal before and after NAT network address translation, IP addresses of the second terminal before and after NAT, and information about a tunnel between the CGN entity and the first gateway to the second gateway, so that the second gateway simulates the CGN entity to forward the data, sent by the second terminal, to the first gateway (12). The CGN entity notifies information about an interworking terminal to a gateway of a peer terminal, and the traffic of interworking terminals is directly transferred between gateways without being forwarded by the CGN entity, thereby reducing resource consumption of the CGN entity and improving transmission efficiency of interworking terminals.</p> |
