Method and apparatus for data transmission

摘要

Embodiments of the present invention relate to communications technologies and disclose a method and a system for establishing a data transmission channel, a SIP server, and a session border controller. A first authentication request message is sent by a first terminal. The first authentication request message includes identifier information of the first terminal and identity information of a second terminal. It is determined that the identifier information of the first terminal matches pre-stored authentication information of the first terminal. According to the identity information of the second terminal, a second authentication request message that carries authentication information of the second terminal is sent to the second terminal. After receiving an authentication success response message from the second terminal, a data transmission channel is established between the first terminal and the second terminal.

主权项

1. A method for establishing a data transmission channel, the method comprising:
receiving a first authentication request message sent by a first terminal, wherein the first authentication request message comprises a terminal identifier of the first terminal and routing information of a second terminal; determining that the terminal identifier of the first terminal matches pre-stored authentication information of the first terminal; obtaining stored authentication information of the second terminal according to the routing information of the second terminal; sending, according to the routing information of the second terminal, a second authentication request message that carries the authentication information of the second terminal to the second terminal; receiving an authentication success response message from the second terminal that confirms that the authentication information of the second terminal in the second authentication request message matches a terminal identifier of the second terminal, wherein the authentication information of the second terminal and the terminal identifier of the second terminal meet a preset mapping relationship; and after receiving the authentication success response message, establishing a data transmission channel between the first terminal and the second terminal; wherein the first authentication request message further comprises a first authentication code generated by the first terminal at random and wherein, before the sending the second authentication request message to the second terminal, the method further comprises:
sending a first authentication field to the first terminal, wherein the first authentication field is calculated by using the first authentication code and a first random number that is self-generated and by using a preset first algorithm;receiving an authentication request message sent by the first terminal, wherein the authentication request message carries the first random number obtained by the first terminal from the first authentication field by using a stored first authentication code and the preset first algorithm; anddetermining that the first random number obtained by the first terminal from the first authentication field and carried in the authentication request message is the same as the first random number that is self-generated.