Inter-system handover and multi-connectivity via an integrated small cell and WiFi gateway
A system comprises an integrated small cell and WiFi (ISW) gateway (GW). The ISW GW is integrated with a mobility management entity (MME) and serving gateway (SGW) and has interfaces with both a 3 GPP access network and a TWAN. The ISW GW operates as a common control gateway and a common user gateway for both LTE networks and TWANs. User equipment (UE) by means of the ISW GW is able to access the capabilities of a packet data network (PDN) through either the LTE network or TWAN. Further, the ISW GW provides for an existing communication connection between a UE and a PDN to be handed over from one of the LTE network or TWAN to the other. Still further, the ISW GW supports simultaneously maintaining two communication paths, one via the LTE network and one via the TWAN, between a UE and a packet network.
1. A network apparatus comprising a processor and a memory, the memory storing computer executable instructions which, when executed by the processor, implement an integrated small cell and WiFi (ISW) gateway in a communications network, the ISW gateway being configured to perform operations comprising:
receiving, over a first interface and from a wireless local area network (WLAN) access node, a create session request message comprising an indication of a handover of a user equipment (UE) session from a home evolved node B (HeNB) to a trusted WLAN, an access point name (APN), a multi-connection indication, an identifier of the UE, and a radio access technology (RAT) type;
sending, over a second interface and to a control plane entity, the create session request message comprising the handover indication, the APN, the multi-connection indication, the identifier of the UE, and the RAT type;
receiving, over the second interface and from the control plane entity, a create session response message, wherein the create session response message comprises general packet radio service (GPRS) tunneling protocol (GTP) tunnel information and bearer parameters, wherein the bearer parameters comprise an indication of the tunnel established between the WLAN and the ISW gateway; and
sending, over the first interface and to the WLAN access node, the create session response message including the GTP tunnel information and the bearer parameters, wherein at least one of the create session request message and the create session response message comprises an indication of a multi-connection access routing policy.
2. The apparatus of claim 1 , wherein:
the first interface is configured to support communications between the trusted WLAN and the ISW gateway; and
the second interface is configured to support communications between the ISW gateway and the control plane entity.
3. The apparatus of claim 1 , wherein the create session request message further comprises at least one of a service set identifier (SSID) or a basic service set identifier (BSSID).
4. The apparatus of claim 1 , wherein the handover is initiated by the UE determining to handover an existing connection from the HeNB to the trusted WLAN.
5. The apparatus of claim 4 , wherein the trusted WLAN sends to the UE an indication that the handover was successful.
6. The apparatus of claim 1 , wherein the create session request message is sent to one of a 5G-GUTI or a 5G-S-TMSI.
7. A method performed by an integrated small cell and WiFi (ISW) gateway in a communications network, the method comprising:
receiving, over a first interface and from a wireless local area network (W LAN) access node, a create session request message comprising an indication of a handover of a user equipment (UE) session from a home evolved node B (HeNB) to a trusted WLAN, an access point name (APN), a multi-connection indication, an identifier of the UE, and a radio access technology (RAT) type;
sending, over a second interface and to a control plane entity, the create session request message comprising the handover indication, the APN, the multi-connection indication, the identifier of the UE, and the RAT type;
receiving, over the second interface and from the control plane entity, a create session response message, wherein the create session response message comprises general packet radio service (GPRS) tunneling protocol (GTP) tunnel information and bearer parameters, wherein the bearer parameters comprise an indication of the tunnel established between the WLAN and the ISW gateway; and
sending, over the first interface and to the WLAN access node, the create session response message including the GTP tunnel information and the bearer parameters, wherein at least one of the create session request message and the create session response message comprises an indication of a multi-connection access routing policy.
8. The method of claim 7 , wherein:
the first interface is configured to support communications between the trusted WLAN and the ISW gateway; and
the second interface is configured to support communications between the ISW gateway and the control plane entity.
9. The method of claim 7 , wherein the create session request message further comprises at least one of a service set identifier (SSID) or a basic service set identifier (BSSID).
10. The method of claim 7 , wherein the handover is initiated by the UE determining to handover an existing connection from the HeNB to the trusted WLAN.
11. The method of claim 10 , wherein the trusted WLAN sends to the UE an indication that the handover was successful.
12. The method of claim 7 , wherein the create session request message is sent to one of a 5G-GUTI or a 5G-S-TMSI.
13. A computer-readable storage medium storing computer-executable instructions which, when executed by a processor of an integrated small cell and WiFi (ISW) gateway in a communications network, cause the ISW gateway to perform operations comprising:
receiving, over a first interface and from a wireless local area network (W LAN) access node, a create session request message comprising an indication of a handover of a user equipment (UE) session from a home evolved node B (HeNB) to a trusted WLAN, an access point name (APN), a multi-connection indication, an identifier of the UE, and a radio access technology (RAT) type;
sending, over a second interface and to a control plane entity, the create session request message comprising the handover indication, the APN, the multi-connection indication, the identifier of the UE, and the RAT type;
receiving, over the second interface and from the control plane entity, a create session response message, wherein the create session response message comprises general packet radio service (GPRS) tunneling protocol (GTP) tunnel information and bearer parameters, wherein the bearer parameters comprise an indication of the tunnel established between the WLAN and the ISW gateway; and
sending, over the first interface and to the WLAN access node, the create session response message including the GTP tunnel information and the bearer parameters, wherein at least one of the create session request message and the create session response message comprises an indication of a multi-connection access routing policy.
14. The computer-readable storage medium of claim 13 , wherein:
the first interface is configured to support communications between the trusted WLAN and the ISW gateway; and
the second interface is configured to support communications between the ISW gateway and the control plane entity.
15. The computer-readable storage medium of claim 13 , wherein the create session request message further comprises at least one of a service set identifier (SSID) or a basic service set identifier (BSSID).
16. The computer-readable storage medium of claim 13 , wherein the handover is initiated by the UE determining to handover an existing connection from the HeNB to the trusted WLAN.
17. The computer-readable storage medium of claim 16 , wherein the trusted WLAN sends to the UE an indication that the handover was successful.