Serving gprs support node and signaling transmission method

The present invention provides a Serving GPRS Support Node (SGSN), comprising: a receiving module, for receiving an Activate Signaling Request from an MS and a Create Signaling Response from a GGSN; a message recognizing module, for recognizing, according to whether the receiving module receives the Create Signaling Response, whether a Create Signaling Request is an initial request or a retransmitted request; a weight setting module, for increasing a DSCP weight value of the retransmitted Create Signaling Request when the message recognizing module determines that the Create Signaling Request is a retransmitted request; and a sending module, for receiving the Create Signaling Request from the weight setting module, and sending the Create Signaling Request to the GGSN. The present invention also provides a signaling transmission method. The present invention can increase the DSCP weight value of the Create Signaling Request when the SGSN retransmits the Create Signaling Request to the GGSN, thereby reducing the probability that the Create Signaling Request is discarded in the case of network congestion.