Node selection in virtual evolved packet core

• US 10,341,947 B2
• Filed: 04/26/2017
• Issued: 07/02/2019
• Est. Priority Date: 10/23/2013
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Mathai, Stinson, Guntupalli, Ravi, Dodd-Noble, Aeneas
• Primary Examiner(s): Gidado, Rasheed
• Application Number:
  US15/497,955
• Publication Number:
  US 20170238245A1
• Time in Patent Office: 797 Days
• CPC Class Codes: H04L 12/4641 Virtual LANs, VLANs, e.g. virtual private networks [VPN] LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272
• CPC Class Codes: H04L 2101/35 containing special prefixes
• CPC Class Codes: H04L 2101/654 International mobile subscriber identity [IMSI] numbers
• CPC Class Codes: H04L 61/301 Name conversion
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 61/4588 containing mobile subscriber information, e.g. home subscriber server [HSS]
• CPC Class Codes: H04L 67/141 Setup of application sessions admission control or resource allocation in data switching networks H04L47/70
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 8/08 Mobility data transfer
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

The present disclosure includes gateways and methods for node selection of virtual network nodes in virtual evolved packet core networks. The methods include receiving, at a gateway from an evolved Node B (eNodeB), an attach request for a user equipment (UE), and determining a network selection hint corresponding to the received attach request, where the network selection hint is used for determining a virtual network node for selection in a mobile cloud network. The methods further include determining a domain name for establishing a network connection based at least in part on the network selection hint, where the selected domain name is associated with a virtual network node in the mobile cloud network. The methods also include selecting a virtual network node associated with the determined domain name, and establishing a network session to the selected virtual network node.

Claims

1. A network element comprising a virtual mobility management entity (MME) to implement virtual network node selection for establishing a long term evolution (LTE) session in a virtual evolved packet core (EPC) network, the virtual MME comprising:

a memory;

an interface; and

one or more computer processors coupled to the memory and the interface;

the virtual MME configured to perform an operation comprising;

receiving, from an evolved Node B (eNodeB), an attach request for a user equipment;

receiving, from at least one of a home subscriber server and a home location register, subscriber information including a network selection hint of a desired attribute type other than geographic location;

determining that the network selection hint corresponds to the received attach request;

determining a domain name for establishing the LTE session, based at least in part on the network selection hint, wherein the determined domain name is associated with a virtual network node in the virtual EPC network, wherein the virtual network node is at least one of a virtual serving gateway and a virtual packet data network gateway;

receiving an address of the virtual network node, wherein the address was identified based on the domain name; and

establishing the LTE session with the virtual network node associated with the determined domain name, thereby implementing, via the virtual MME and for establishing the LTE session in the virtual EPC network, virtual network node selection that disregards where the eNobeB is geographically located relative to at least one of the virtual MME, the virtual serving gateway, and the virtual packet data network gateway.

2. The network element of claim 1, wherein the domain name is a fully-qualified domain name.

3. The network element of claim 1, wherein the domain name is a fully-qualified domain name for the virtual serving gateway or the virtual packet data network gateway.

4. The network element of claim 1, wherein the network selection hint is an attribute-value pair contained in an Update-Location Answer (ULA) message from the home subscriber server.

5. A computer-implemented method of implementing, via a network element comprising a virtual mobility management entity (MME), virtual network node selection for establishing a long term evolution (LTE) session in a virtual evolved packet core (EPC) network, the computer-implemented method comprising:

receiving, from an evolved Node B (eNodeB), an attach request for a user equipment;

receiving, from at least one of a home subscriber server and a home location register, subscriber information including a network selection hint of a desired attribute type other than geographic location;

determining that the network selection hint corresponds to the received attach request;

determining a domain name for establishing the LTE session, by operation of one or more computer processors and based at least in part on the network selection hint, wherein the determined domain name is associated with a virtual network node in the virtual EPC network, wherein the virtual network node is at least one of a virtual serving gateway and a virtual packet data network gateway;

receiving an address of the virtual network node, wherein the address was identified based on the domain name; and

establishing the LTE session with the virtual network node associated with the determined domain name, thereby implementing, via the virtual MME and for establishing the LTE session in the virtual EPC network, virtual network node selection that disregards where the eNobeB is geographically located relative to at least one of the virtual MME, the virtual serving gateway, and the virtual packet data network gateway.

6. The computer-implemented method of claim 5, wherein the domain name is a fully-qualified domain name.

7. The computer-implemented method of claim 5, wherein the domain name is a fully-qualified domain name for the virtual serving gateway or the virtual packet data network gateway.

8. The computer-implemented method of claim 5, wherein the address of the virtual network node is identified by and received from a domain name server (DNS) responsive to providing the domain name to the DNS.

9. The computer-implemented method of claim 8, wherein the network selection hint is an attribute-value pair contained in an Update-Location Answer (ULA) from the at least one of the home subscriber server and the home location register, wherein the network element is configured to determine, based on the attribute-value pair, whether to select a virtual network node or a macro network node in response to the attach request.

10. The computer-implemented method of claim 9, wherein the network selection hint corresponds to a domain name of a related virtual network node, wherein the determining the domain name further comprises determining the domain name for the virtual network node based on the domain name of the related virtual network node.

11. The computer-implemented method of claim 10, wherein the domain name is a fully-qualified domain name for the virtual serving gateway and virtual packet data network gateway in respective instances, in order to permit selection of a pool of virtual network nodes, wherein the network selection hint includes at least a portion of the fully-qualified domain name.

12. The computer-implemented method of claim 11, further comprising:

determining whether the user equipment should select nodes in at least one of a mobile cloud network (MCN) and a macro network, based at least in part on the network selection hint, wherein the network selection hint is contained in service parameters from subscription records for MCN domains, wherein the network selection hint is stored in an MIP6-Agent-Info parameter.

13. The computer-implemented method of claim 12, wherein in a given instance, the network selection hint corresponds to a domain name of a second virtual network node related to the virtual network node, wherein the network element is further to determine the domain name for the virtual network node based on the domain name of the second virtual network node.

14. The computer-implemented method of claim 13, wherein the DNS is part of an MCN domain of the MCN domains, the MCN domain including an MCN service domain, an MCN management domain, and an MCN service point of delivery (POD).

15. The computer-implemented method of claim 14, wherein the MCN service domain includes a service container and a customer container, each of the service and customer containers including one or more virtual service elements.

16. The computer-implemented method of claim 15, wherein the MCN management domain includes an authentication, authorization, and accounting (AAA) server, the DNS, a service provisioning module, an orchestration module, a service assurance module, an analytics module, a topology manager, and an MCN creator.

17. The computer-implemented method of claim 16, wherein the MCN service POD includes a plurality of components including a hypervisor component, a compute component, a network component, and a storage component.

18. At least one non-transitory computer-readable media comprising logic executable to perform an operation to implement, via a virtual mobility management entity (MME), virtual network node selection for establishing a long term evolution (LTE) session in a virtual evolved packet core (EPC) network, the operation comprising:

receiving, from an evolved Node B (eNodeB), an attach request for a user equipment;

receiving, from at least one of a home subscriber server and a home location register, subscriber information including a network selection hint of a desired attribute type other than geographic location;

determining that the network selection hint corresponds to the received attach request;

determining a domain name for establishing the LTE session, based at least in part on the network selection hint, wherein the determined domain name is associated with a virtual network node in the virtual EPC network, wherein the virtual network node is at least one of a virtual serving gateway and a virtual packet data network gateway;

receiving an address of the virtual network node, wherein the address was identified based on the domain name; and

establishing the LTE session with the virtual network node associated with the determined domain name, thereby implementing, via the virtual MME and for establishing the LTE session in the virtual EPC network, virtual network node selection that disregards where the eNobeB is geographically located relative to at least one of the virtual MME, the virtual serving gateway, and the virtual packet data network gateway.

19. The at least one non-transitory computer-readable media of claim 18, wherein the domain name is a fully-qualified domain name.

20. The at least one non-transitory computer-readable media of claim 18, wherein the domain name is a fully-qualified domain name for the virtual serving gateway or the virtual packet data network gateway.