Gateway update information notification method, and controller

Patent metadata

Field	Value
Publication number	US-2016295476-A1
Application number	US-201415037812-A
Country	US
Kind code	A1
Filing date	Jun 4, 2014
Priority date	Nov 22, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A method and system for notifying information when a gateway in a software-defined network is changed, comprising: after reselecting a gateway, a controller transmits the user plane information of the reselected gateway to a corresponding front-end network element.

First claim

1 . A method for notifying gateway update information, comprising:
reselecting, by a controller, a gateway to obtain a new gateway; sending, by the controller, user plane information of the new gateway to a corresponding front-end network element, wherein the user plane information comprises user plane address information of the new gateway.

2 . The method for notifying gateway update information according to claim 1 , wherein the gateway at least comprises one of a Serving Gateway (SGW) and a PDN Gateway (PGW).

3 . The method for notifying gateway update information according to claim 1 , wherein sending, by the controller, the user plane information of the new gateway to the corresponding front-end network element comprises:
sending a GPRS Tunnel Protocol (GTP) notification message or GTP Update Bearer Request message carrying the user plane information of the new gateway to the front-end network element; or sending a GTP Update Bearer Request message carrying an update indication to the front-end network element, sending, by the front-end network element, a GTP Modify Bearer Request message to the controller according to the update indication, and sending, by the controller, a bearer response message carrying the user plane information of the new gateway to the front-end network element through a GTP Modify Bearer Response.

4 . The method for notifying gateway update information according to claim 2 , further comprising: when the gateway comprises a PGW, after sending, by the controller, the user plane information of the new gateway to the corresponding front-end network element, sending, by the front-end network element through an S1 interface application protocol message or an Iu message, user plane information of a new SGW to a radio access network communicating with an original SGW.

5 . The method for notifying gateway update information according to claim 4 , wherein the front-end network element sends, through the S1 interface application protocol message or the Iu message, the user plane information of the new SGW to a radio network controller or an evolved Node B in the radio access network communicating with the original SGW.

6 . The method for notifying gateway update information according to claim 5 , further comprising: before the front-end network element sends the user plane information of the new SGW to the radio access network communicating with the original SGW, sending, by the controller, user plane information of a PGW communicating with the original SGW to the new SGW.

7 . The method for notifying gateway update information according to claim 2 , wherein the front-end network element is a mobility management entity or a Serving GPRS Support Node (SGSN) supporting S4 interface.

8 . The method for notifying gateway update information according to claim 1 , further comprises: reselecting, by the controller, a Serving GPRS Support Node (SGSN), and sending user plane information, including user plane address information, of a new SGSN to a radio network controller communicating with an original SGSN.

9 . The method for notifying gateway update information according to claim 1 , wherein the user plane information further comprises a tunnel endpoint identifier.

10 . A controller for notifying gateway update information, comprising a reselecting module and a sending module,
wherein the reselecting module is configured to reselect a gateway to obtain a new gateway; and wherein the sending module is configured to send user plane information of the gateway reselected by the reselecting module to a corresponding front-end network element, the user plane information comprising user plane address information of a new Serving Gateway (SGW).

11 . The controller according to claim 10 , wherein the sending module is configured to: send a GPRS Tunnel Protocol (GTP) notification message or a GTP Update Bearer Request message carrying user plane information of the new gateway to the front-end network element; or
send a GTP Update Bearer Request message carrying an update indication to the front-end network element, and send a bearer response message carrying the user plane information of the new gateway to the front-end network element after the front-end network element sends a GTP Modify Bearer Request message according to the update indication

12 . The controller according to claim 10 , wherein the gateway comprises at least one of an SGW and a packet data network gateway.

13 . The controller according to claim 10 , wherein the reselecting module is further configured to reselect a Serving GPRS Support Node (SGSN); and
the sending module is further configured to send user plane information, including user plane address information, of the SGSN reselected by the reselecting module to a radio access network communicating with an original SGSN.

14 . The method for notifying gateway update information according to claim 8 , wherein the user plane information further comprises a tunnel endpoint identifier.

Assignees

• Zte Corp

Inventors

• Bi Yifeng
• Wang Jing
• Tian Tian

Classifications

• H04W36/10 Primary

  Reselecting an access point controller · CPC title

• H04W68/00

  User notification, e.g. alerting and paging, for incoming communication, change of service or the like · CPC title

• H04W88/16 Primary

  Gateway arrangements · CPC title

• H04W76/22

  Manipulation of transport tunnels · CPC title

• H04W36/0055

  Transmission or use of information for re-establishing the radio link · CPC title