Method for establishing HRPD network packet data service in 1x network

A method for establishing a High Rate Packet Data (HRPD) network packet data service in a 1x network, comprising:

• receiving, by a target Access Network/Packet Control Function (AN/PCF) of an HRPD network, a session establishment request from an Access Terminal (AT) through a channel on an air interface of the 1x network, wherein the AT is in a service in the 1x network and has an existing dormant session with the HRPD network;
• establishing, by the target AN/PCF, an HRPD session with the AT after obtaining session information of the existing dormant HRPD session;
• performing, by the target AN/PCF and the AT, a session configuration based on the obtained session information, and establishing a data connection for an HRPD network packet data service,
• wherein the channel is newly created on the air interface of the 1x network, and before the step of receiving a session establishment request from the AT, the method further comprises:
• creating, by the AT, the channel on the air interface of the 1x network to bear an information flow between the AT and the HRPD network,
• wherein the step of creating the channel on the air interface of the 1x network to bear the information flow between the AT and the HRPD network comprises:
• sending, by the AT, an enhanced origination message to the BS;
• sending, by the BS, an adding service request to a Mobile Switching Center (MSC) after returning a BS acknowledgement instruction to the AT;
• returning, by the MSC, an assignment request;
• sending, by the AT, to the BS a service request which comprises a service configuration information record comprising a multiplex option, a traffic channel request and a service ID;
• and
• returning, by the BS, a service connection response which comprises a valid starting time of the service configuration and a service configuration information record comprising a multiplex option, a traffic channel assignment and a service ID.