Cisco Technology, Inc.

Mukesh Yadav

Sandeep Dasgupta

Shivakumar Nithiyanantham

Raghunadha Reddy Pocha

Jis Abraham

Ravi Shankar Mantha

Navneet Priya

Mantha Ravi Shankar

Vimal Srivastava

Ravi Shekhar

Aditya Prakash

Ravi Sankar Mantha

Somaraju Kaki

Dishant Mukesh Parikh

Siddeshi R

The present technology is generally directed to optimizing a non-3GPP untrusted Wi-Fi to 5G system handover followed by Evolved Packet System (EPS) fallback, more specifically, to delaying removal of the Wi-Fi session resources and creating a voice flow as part of the EPS fallback. The present technology can receive a request for an EPS fallback from a mobile device for a handover to a 5G network while the mobile device is in communication over non-3GPP access network, maintain one or more resources of the non-3GPP access network during data path switching from the non-3GPP access network to the 5G network, generate a list of EPS bearer identifiers to transmit to an access and mobility management function (AMF), wherein the list of EPS bearer identifiers is associated with a voice flow to transfer the one or more resources of the non-3GPP access network as part of the handover from the non-3GPP access network to the 5G network, and transmit the list of EPS bearer identifiers to a mobility management entity (MME).

Systems and methods to optimize non-3GPP untrusted WI-FI to new radio evolved packet system fallback handover

Presented herein are efficient techniques in which an application function (AF) session is established between a first policy control function (PCF) in a standalone non-public network (SNPN) domain and a second PCF in a Public Land Mobile Network (PLMN) domain, wherein a user equipment has a first session with the SNPN domain, the AF session is established for a second session of the user equipment with the PLMN domain, and the AF session is bound to the first session. The second PCF obtains an indication of a data flow initiated for the user equipment for the second session within the PLMN domain and determines flow information associated with the data flow. The second PCF transmits to the first PCF the flow information associated with the data flow for creating the data flow in the SNPN domain.

Integration of a standalone non-public network and a public land mobile network using an application function session

Systems and methods to optimize non-3GPP untrusted Wi-Fi to new radio evolved packet system fallback handover

A control plane function node may be used in a Fifth Generation (5G) Non-Standalone (NSA) architecture having Radio Access Network (RAN) level interworking between a Long-Term Evolution (LTE) RAN and a 5G New Radio (NR). The node obtains usage report data which are based on traffic of a user equipment (UE) via primary and secondary Radio Access Technologies (RATs). The node also obtains secondary RAT usage report data which are based on traffic of the UE via the secondary RAT. The node constructs a message which indicates a request for charging based on the usage report data and the secondary RAT usage report data. In constructing the message, the node populates, in association with a corresponding rating group and usage data of the UE, an identifier of a flow or bearer associated with secondary RAT usage, together with the secondary RAT usage report data.

Radio access technology (RAT) type usage differentiation for differential charging in 5G non-standalone (5G NSA) architecture deployments

Systems and methods are provided for utilizing an asynchronous report feature when a time or volume reporting trigger is unavailable. The systems and method can include receiving node level capabilities from at least one of a plurality of user plane functions, receiving an asynchronous report from the at least one of the plurality of user plane functions, determining an absence of a reporting trigger based on charging information associated with a policy control function and trigger information associated with a charging function, selecting a user plane function from the plurality of user plane functions based on the asynchronous report, and generating a usage reporting rule without the reporting trigger to be provided to the user plane function from the plurality of user plane functions.

System and mechanism to report usage for offline services with specific trigger requirements

A network element configured to support charging for a service in a network accesses policy rules defining a rating group to be used for offline charging. While a protocol data unit (PDU) session for user equipment is being established in the network, the network element sends, to a charging function configured to send charging data records related to service usage to a billing domain, a charging data request that establishes offline charging for the PDU session and indicates the rating group. The network element also receives, from the charging function, a charging data response including one or more triggers and thresholds for the rating group for the offline charging.

Split control and data plane architecture to enable rating group-level thresholds and triggers from charging function for offline charging

In one example, a session management function entity is configured to obtain an indication of a backup resource usage quota associated with a rating group of a user session for a user equipment configured to communicate via a mobile core network. The rating group is subject to online charging. The session management function entity determines that a charging function entity configured to provide an indication of a primary resource usage quota associated with the rating group is unreachable. In response to determining that the charging function entity is unreachable, the session management function entity allocates the backup resource usage quota associated with the rating group while the charging function entity is unreachable.

Achieving seamless service during unreachability of charging function entity

Techniques that provide optimal packet data network gateway selection upon initial attachment of a upon an initial user equipment (UE) attachment via a WiFi Evolved Packet Data Gateway (ePDG) are described herein. In at least one embodiment, a method may include determining, by an ePDG, whether a UE is capable to connect to at least one of a 5G standalone mobile core network and a 5G non-standalone mobile core network; determining, by the ePDG, whether the UE is subscribed to connect to at least one of the 5G standalone mobile core network and the 5G non-standalone mobile core network; and selecting, by the ePDG, a packet data network gateway to support the UE connection based, at least in part, on determining that the UE is capable and is subscribed to connect to at least one of the 5G standalone mobile core network and the 5G non-standalone mobile core network.

Providing optimal packet data network gateway selection for 5G network environments upon initial user equipment attachment via a WiFi evolved packet data gateway

At least one offline usage reporting rule is instantiated at a user plane element of the telecommunications network, wherein the usage reporting rule indicates at least one trigger condition. The user plane element detects an occurrence of the at least one trigger condition in traffic processed by the user plane element and, in response, generates and temporarily stores a first usage report. Subsequently, the user plane element detects an occurrence of an immediate reporting condition and, in response to detecting of the occurrence of the immediate reporting condition, sends the first usage report to a control plane element.

Optimized usage reporting in 4G/5G telecommunication networks

A computing device receives one or more messages in a secure communication session with a peer device. Security information for the secure communication session includes a first network address associated with the peer device. The computing device detects that a new message in the secure communication session includes a second network address different from the first network address. The computing device validates the new message as part of the secure communication session and sends an informational request to the peer device. The informational request is sent to the peer device at a destination address of the second network address. The computing device receives an update message from the peer device.

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Bengaluru, India

Mukesh Yadav