Method and nodes for providing handover management
The embodiments herein relate to a method in a Gn/Gp SGSN for providing handover management. The Gn/Gp SGSN provides a handover for a UE to and from a non-3GPP and 3GPP by utilizing a PDP context that was previously created for the UE during an attach procedure. The previously created PDP context is for a previously serving PGW.
1. A method, in a Home Location Register, HLR, for providing handover management, the method comprising:
receiving, from a Gn/Gp Serving General Packet Radio Service Support Node, SGSN, an identification of a Packet Data Network Gateway, PGW, at a Packet Data Network, PDN, connection establishment;
storing the identification of the PGW; and
sending the identification of the PGW to a Home Subscriber Server, HSS.
2. The method of claim 1 , further comprising:
sending, to the Gn/Gp SGSN, the identification of the PGW serving the UE upon an establishment of a handover procedure.
3. The method of claim 1 , further comprising:
transmitting an acknowledgement of the received identification of the PGW to the Gn/Gp SGSN.
4. The method of claim 1 , further comprising:
when the UE has decided to handover from non-3GPP to 3GPP, retrieving the identification of an already allocated PGW from a Home Subscriber Server, HSS.
5. The method of claim 1 , wherein the identification of the PGW is at least one of a PGW Fully Qualified Domain Name, FQDN, a PGW Internet Protocol, IP, address, an Access Point Name, APN, and a Public Land Mobile Network, PLMN, identification.
6. The method of claim 1 , wherein the handover is from one of:
Global System for Mobile Communications, GSM, Enhanced Data Rates for GSM Evolution, EDGE, Radio Access Network/Universal Terrestrial Radio Access Network, GERAN/UTRAN, to WiFi;
WiFi to GERAN/UTRAN; and
GERAN/UTRAN to Evolved-Universal Terrestrial Access Network, E-UTRAN, and then to WiFi.
7. A Home Location Register, HLR, for providing handover management, the HLR being configured to:
receive, from a Gn/Gp Serving General Packet Radio Service Support Node, SGSN, an identification of a Packet Data Network Gateway, PGW, at a Packet Data Network, PDN, connection establishment;
store the identification of the PGW; and
send the identification of the PGW to a Home Subscriber Server, HSS.
8. The HLR of claim 7 , being further configured to:
send, to the Gn/Gp SGSN, the identification of the PGW serving the UE upon an establishment of a handover procedure.
9. The HLR of claim 7 , being further configured to:
transmit an acknowledgement of the received identification of the PGW to the Gn/Gp SGSN.
10. The HLR of claim 7 , being further configured to:
retrieve, when the UE has decided to handover from non-3GPP to 3GPP, the identification of an already allocated PGW from a Home Subscriber Server, HSS.
11. The HLR of claim 7 , wherein the identification of the PGW is at least one of a PGW Fully Qualified Domain Name, FQDN, a PGW Internet Protocol, IP, address, an Access Point Name, APN, and a Public Land Mobile Network, PLMN, identification.
12. The HLR of claim 7 , wherein the handover is from one of:
Global System for Mobile Communications, GSM, Enhanced Data Rates for GSM Evolution, EDGE, Radio Access Network/Universal Terrestrial Radio Access Network, GERAN/UTRAN, to WiFi;
WiFi to GERAN/UTRAN; and
GERAN/UTRAN to Evolved-Universal Terrestrial Access Network, E-UTRAN, and then to WiFi.
13. A computer storage medium storing a computer program comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out a method, in a Home Location Register, HLR, for providing handover management, the method comprising:
receiving, from a Gn/Gp Serving General Packet Radio Service Support Node, SGSN, an identification of a Packet Data Network Gateway, PGW, at a Packet Data Network, PDN, connection establishment;
storing the identification of the PGW; and
sending the identification of the PGW to a Home Subscriber Server, HSS.