# US 2014/0153544 A1 · Method and system for notifying attribute of IP address and SGW > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153544 A1 - Document ID: US20140153544A1 - Status: Published application - Kind: A1 - Application number: 14/233,808 - Filed: 2012-06-13 - Published: 2014-06-05 - Earliest claimed: 2011-07-21 - Assignees: Zte Corporation - Inventors: Fei Lu; Gang Chen - Web page: https://patentgrep.com/patent/US20140153544A1 ## CPC - H04W 8/26: Network addressing or numbering for mobility support - H04L 12/1407: {Policy-and-charging control [PCC] architecture} - H04L 61/5076: Update or notification mechanisms, e.g. DynDNS - H04M 15/83: {Notification aspects} - H04M 15/84: {Types of notifications} - H04M 15/85: {characterised by the type of condition triggering a notification} - H04W 4/24: Accounting or billing - H04W 36/0019: {adapted for mobile IP [MIP]} - H04L 12/1425: {involving dedicated fields in the data packet for billing purposes} - H04L 61/5007: Internet protocol [IP] addresses - H04W 36/12: Reselecting a serving backbone network switching or routing node - H04W 88/16: Gateway arrangements - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract A method and a system for notifying an attribute of an Internet Protocol (IP) address and a Serving Gateway (SGW) are disclosed. When an SGW is taken as a User Equipment's (UE's) SGW, the new SGW can be notified of an attribute of the UE's IP address. The technology of notifying an attribute of an IP address in the disclosure can ensure that the new SGW can learn the attribute of the UE's IP address in time when the new SGW is taken as the UE's SGW. Therefore, a charging gateway function entity connected with the new SGW can accurately charge the UE according to the attribute of the IP address. ## Claims ### Claim 1 A method for notifying an attribute of an Internet Protocol (IP) address, comprising: when a new Serving Gateway (SGW) is taken as a User Equipment's (UE's) SGW, notifying the new SGW of an attribute of the UE's IP address. ### Claim 2 (depends on 1) The method according to claim 1, wherein the notifying comprises at least one of the following: passing, by a mobility management unit, the attribute of the UE's IP address to the new SGW in a session establishment request message; or passing, by a Packet Data Network Gateway (PGW), the attribute of the UE's IP address to the new SGW, after the UE moves and the new SGW is taken as the UE's SGW. ### Claim 3 (depends on 2) The method according to claim 2, wherein in the case that the attribute of the UE's IP address is passed to the new SGW by the mobility management unit in the session establishment request message, the method further comprises: acquiring, by the mobility management unit, the attribute of the IP address during at least one of an attach procedure, a UE-requested Packet Data Network (PDN) connection establishment procedure, and a Packet Data Protocol (PDP) context activation procedure; and in the case that the attribute of the UE's IP address is passed to the new SGW by the PGW, the PGW passes the attribute of the IP address in a bearer modification response message. ### Claim 4 (depends on 2) The method according to claim 2, wherein in the case that the attribute of the UE's IP address is passed to the new SGW by the mobility management unit in the session establishment request message, the method further comprises: passing, by the PGW, the attribute of the IP address to the mobility management unit via the new SGW in a session establishment response message; and when the UE moves to a coverage area of a new mobility management unit, passing, by the UE's original mobility management unit, the attribute of the IP address to the new mobility management unit during a context pass procedure; and in the case that the attribute of the UE's IP address is passed to the new SGW by the PGW, the method further comprises: storing, by the PGW, the attribute of the IP address in a PGW context during at least one of an attach procedure, a UE-requested PDN connection establishment procedure, and a PDP context activation procedure. ### Claim 5 (depends on 1) The method according to claim 1, wherein the attribute of the UE's IP address comprises a dynamic-IP-address attribute and a static-IP-address attribute. ### Claim 6 (depends on 2) The method according to claim 2, wherein the mobility management unit is a Mobility Management Entity (MME) or a Serving General Packet Radio Service (GPRS) Support Node (SGSN). ### Claim 7 (depends on 1) The method according to claim 1, further comprising: charging, by a Charging Gateway Function (CGF) entity connected with the SGW, the UE according to the attribute of the IP address. ### Claim 8 A system for notifying an attribute of an Internet Protocol (IP) address, comprising an Serving Gateway (SGW) confirmation unit and an IP address attribute notification unit, wherein the SGW confirmation unit is configured to confirm that a new SGW is taken as a UE's SGW, and notify the IP address attribute notification unit of the confirmed result; and the IP address attribute notification unit is configured to notify a new SGW of an attribute of the User Equipment's (UE's) IP address according to the notification of the SGW confirmation unit. ### Claim 9 (depends on 8) The system according to claim 8, wherein the IP address attribute notification unit is configured to notify the new SGW of the attribute of the UE's IP address by at least one of the following: controlling a mobility management unit to pass the attribute of the UE's IP address to the new SGW in a session establishment request message; or controlling a Packet Data Network Gateway (PGW) to pass the attribute of the UE's IP address to the new SGW, after the UE moves and the new SGW is taken as the UE's SGW. ### Claim 10 (depends on 9) The system according to claim 9, wherein in the case that the attribute of the UE's IP address is passed to the new SGW by the mobility management unit in the session establishment request message, the mobility management unit is further configured to: acquire the attribute of the IP address during at least one of an attach procedure, a UE-requested Packet Data Network (PDN) connection establishment procedure, and a Packet Data Protocol (PDP) context activation procedure; and in the case that the attribute of the UE's IP address is passed to the new SGW by the PGW, the PGW is configured to pass the attribute of the IP address in a bearer modification response message. ### Claim 11 (depends on 9) The system according to claim 9, wherein in the case that the attribute of the UE's IP address is passed to the new SGW by the mobility management unit in the session establishment request message, the PGW is further configured to pass the attribute of the IP address to the mobility management unit via the new SGW in a session establishment response message; and when the UE moves to a coverage area of a new mobility management unit, the UE's original mobility management unit is configured to pass the attribute of the IP address to the new mobility management unit during a context pass procedure; and in the case that the attribute of the UE's IP address is passed to the new SGW by the PGW, the PGW is further configured to store the attribute of the IP address in a PGW context during at least one of an attach procedure, a UE-requested PDN connection establishment procedure, and a PDP context activation procedure. ### Claim 12 (depends on 8) The system according to claim 8, further comprising a Charging Gateway Function (CGF) entity connected with the SGW, wherein the CGF entity is configured to charge the UE according to the attribute of the IP address. ### Claim 13 (depends on 8) The system according to claim 8, wherein the attribute of the UE's IP address comprises a dynamic-IP-address attribute and a static-IP-address attribute. ### Claim 14 (depends on 9) The system according to claim 9, wherein the mobility management unit is a Mobility Management Entity (MME) or a Serving General Packet Radio Service (GPRS) Support Node (SGSN). ### Claim 15 A Serving Gateway (SGW), which is configured to receive an attribute of a User Equipment's (UE's) Internet Protocol (IP) address, wherein the SGW is one which is newly taken as the UE's SGW. ### Claim 16 (depends on 15) The SGW according to claim 15, wherein the attribute of the IP address is passed by an IP address attribute notification unit; and the IP address attribute notification unit is configured to notify the new SGW of the attribute of the IP address by at least one of the following: controlling a mobility management unit to pass the attribute of the UE's IP address to the new SGW in a session establishment request message; or controlling a Packet Data Network Gateway (PGW) to pass the attribute of the UE's IP address to the new SGW, after the UE moves and the new SGW is taken as the UE's SGW. ### Claim 17 (depends on 16) The SGW according to claim 16, wherein in the case that the attribute of the UE's IP address is passed to the new SGW by the mobility management unit in the session establishment request message, the mobility management unit is further configured to: acquire the attribute of the IP address during at least one of an attach procedure, a UE-requested Packet Data Network (PDN) connection establishment procedure, and a Packet Data Protocol (PDP) context activation procedure; and in the case that the attribute of the UE's IP address is passed to the new SGW by the PGW, the PGW is configured to pass the attribute of the IP address in a bearer modification response message. ### Claim 18 (depends on 16) The SGW according to claim 16, wherein in the case that the attribute of the UE's IP address is passed to the new SGW by the mobility management unit in the session establishment request message, the PGW is further configured to pass the attribute of the IP address to the mobility management unit via the new SGW in a session establishment response message; and when the UE moves to a coverage area of a new mobility management unit, the UE's original mobility management unit is configured to pass the attribute of the IP address to the new mobility management unit during a context pass procedure; and in the case that the attribute of the UE's IP address is passed to the new SGW by the PGW, the PGW is further configured to store the attribute of the IP address in a PGW context during at least one of an attach procedure, a UE-requested PDN connection establishment procedure, and a PDP context activation procedure. ### Claim 19 (depends on 15) The SGW according to claim 15, wherein the SGW is connected with a Charging Gateway Function (CGF) entity, and the CGF entity is configured to charge the UE according to the attribute of the IP address wherein the attribute of the UE's IP address comprises a dynamic-IP-address attribute and a static-IP-address attribute. ### Claim 20 (canceled) ### Claim 21 (depends on 16) The SGW according to claim 16, wherein the mobility management unit is a Mobility Management Entity (MME) or a Serving General Packet Radio Service (GPRS) Support Node (SGSN).