Method and system for routing rule transmission, and device

A method for routing rule transmission, comprising:

• receiving, by a gateway device, mode indication information from a policy and charging rules function (PCRF), wherein the mode indication information is used to indicate a mode of a packet data network (PDN) connection of a terminal;
• when the mode indication information indicates that the PDN connection of the terminal is in a network-initiated network based IP flow mobility (NBIFOM) mode, sending, by the gateway device, third indication information to an intermediate network device, wherein the third indication information is used to instruct the intermediate network device to send an NBIFOM container to the terminal using a request message;
• receiving, by the gateway device, an NBIFOM routing rule request;
• and
• sending, by the gateway device according to the NBIFOM routing rule request, an NBIFOM container containing K routing rules to the intermediate network device, wherein K is an integer greater than or equal to 1.

An intermediate network device, comprising a first communications interface, a second communications interface, a processor, and a memory, wherein

• the memory is configured to store program code for performing a method for routing rule transmission;
• and
• the processor is configured to invoke the program code in the memory to perform:
• receiving, via the first communications interface, a network based IP flow mobility (NBIFOM) routing rule request from a terminal, and sending the NBIFOM routing rule request to a gateway device by using the second communications interface;
• receiving, via the second communications interface, an NBIFOM container containing K routing rules from the gateway device, and sending, using the first communications interface, the NBIFOM container containing the K routing rules to the terminal, wherein K is an integer greater than or equal to 1;
• and
• receiving, via the first communications interface, routing rule acknowledgement indication information from the terminal, and sending the routing rule acknowledgement indication information to the gateway device by using the second communications interface, wherein
• the routing rule acknowledgement indication information comprises first indication information or second indication information, wherein the first indication information is used to indicate that the terminal accepts the K routing rules, and wherein the second indication information is used to indicate that the terminal rejects at least one of the K routing rules.

A gateway device, comprising a first communications interface, a second communications interface, a processor, and a memory, wherein

• the memory is configured to store program code for performing a method for routing rule transmission;
• and
• the processor is configured to invoke the program code in the memory to perform:
• receiving, via the first communications interface, mode indication information from a policy and charging rules function (PCRF), wherein the mode indication information is used to indicate a mode of a packet data network (PDN) connection of a terminal;
• when the mode indication information indicates that the PDN connection of the terminal is in a network-initiated network based IP flow mobility (NBIFOM) mode, sending third indication information to an intermediate network device via the second communications interface, wherein the third indication information is used to instruct the intermediate network device to send an NBIFOM container to the terminal using a request message;
• receiving an NBIFOM routing rule request via the second communications interface;
• and
• sending, according to the NBIFOM routing rule request, an NBIFOM container containing K routing rules to the intermediate network device via the second communications interface, wherein K is an integer greater than or equal to 1.