# US 12,192,288 B2 · Proactive indication of network session disruption > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,288 B2 - Document ID: US12192288B2 - Status: Granted - Kind: B2 - Application number: 17/490,154 - Filed: 2021-09-30 - Published: 2023-03-30 - Granted: 2025-01-07 - Earliest claimed: 2021-09-30 - Assignees: Cisco Technology, Inc. - Applicants: Cisco Technology, Inc. - Inventors: Ather Sayeed Kanak; Renhua Wen; Vaibhav Lade - Web page: https://patentgrep.com/patent/US12192288B2 ## CPC - H04L 67/141: Setup of application sessions (admission control or resource allocation in data switching networks H04L47/70) - G06F 3/0604: {Improving or facilitating administration, e.g. storage management} - G06F 3/0655: {Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices} - G06F 3/067: {Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Techniques are described for providing a proactive indication of a disruption of a network session. In one example, a network session is established between a first endpoint and a second endpoint based on a connection-oriented protocol. One or more network attributes associated with the network session are stored in a persistent storage. The one or more network attributes may be obtained from the persistent storage when the network session is disrupted. A proactive indication that the network session has been disrupted may be provided to the second endpoint based on the one or more network attributes. ## Claims ### Claim 1 A method comprising: establishing a network session between a first endpoint and a second endpoint based on a connection-oriented protocol; storing, in a persistent storage, one or more network attributes associated with the network session, wherein the one or more network attributes include a verification tag; when the network session is disrupted as a result of a failure of the first endpoint, obtaining the one or more network attributes from the persistent storage; and based on the one or more network attributes, providing, to the second endpoint, a proactive indication that the network session has been disrupted, wherein the proactive indication is an abort chunk that includes the verification tag in which the verification tag is configured to enable the second endpoint to verify one or more network communications of the network session. ### Claim 2 (depends on 1) The method of claim 1, wherein the obtaining and the providing occur at the first endpoint after a restart of the first endpoint, wherein the first endpoint is a packet core gateway. ### Claim 3 (depends on 1) The method of claim 1, wherein the obtaining and the providing occur at a third endpoint, wherein the third endpoint is a packet core gateway. ### Claim 4 (depends on 1) The method of claim 1, further comprising: obtaining, from the second endpoint in response to the proactive indication, a request to establish a subsequent network session with the second endpoint based on the connection-oriented protocol; and in response to the request, establishing the subsequent network session based on the connection-oriented protocol. ### Claim 5 (depends on 1) The method of claim 1, wherein the verification tag obtained from the second endpoint for inclusion in the one or more network communications. ### Claim 6 (depends on 1) The method of claim 1, wherein the one or more network attributes further include at least one of an address of the second endpoint or a port of the second endpoint. ### Claim 7 (depends on 1) The method of claim 1, wherein the connection-oriented protocol is a stream control transmission protocol. ### Claim 8 (depends on 1) The method of claim 1, wherein the first endpoint is a packet core gateway. ### Claim 9 (depends on 8) The method of claim 8, wherein the packet core gateway includes an access and mobility management function and a session management function. ### Claim 10 An apparatus comprising: a network interface configured to obtain or provide network communications; and one or more processors coupled to the network interface, wherein the one or more processors are configured to: establish a network session between the apparatus and an endpoint based on a connection-oriented protocol; and store, in a persistent storage, one or more network attributes associated with the network session, wherein the one or more network attributes include a verification tag and wherein: when the network session is disrupted as a result of a failure of the apparatus, the one or more network attributes are obtained from the persistent storage; and based on the one or more network attributes, a proactive indication that the network session has been disrupted is provided to the endpoint, wherein the proactive indication is an abort chunk that includes the verification tag in which the verification tag is configured to enable the endpoint to verify one or more network communications of the network session. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the one or more processors are configured to: obtain the one or more network attributes after a restart of the apparatus, wherein the apparatus is a packet core gateway; and provide the proactive indication to the endpoint. ### Claim 12 (depends on 10) A system comprising the apparatus of claim 10 and another apparatus, wherein the another apparatus is a packet core gateway configured to: obtain the one or more network attributes; and provide the proactive indication to the endpoint. ### Claim 13 (depends on 10) The apparatus of claim 10, wherein the one or more network attributes further include at least one of an address of the endpoint and a port of the endpoint. ### Claim 14 One or more non-transitory computer readable storage media encoded with instructions that, when executed by one or more processors, cause the one or more processors to: establish a network session between a first endpoint and a second endpoint based on a connection-oriented protocol; store, in a persistent storage, one or more network attributes associated with the network session, wherein the one or more network attributes include a verification tag; when the network session is disrupted as a result of a failure of the first endpoint, obtain the one or more network attributes from the persistent storage; and based on the one or more network attributes, provide, to the second endpoint, a proactive indication that the network session has been disrupted, wherein the proactive indication is an abort chunk that includes the verification tag in which the verification tag is configured to enable the second endpoint to verify one or more network communications of the network session. ### Claim 15 (depends on 14) The one or more non-transitory computer readable storage media of claim 14, wherein the first endpoint is configured to obtain the one or more network attributes and provide the proactive indication to the second endpoint after a restart of the first endpoint and the first endpoint is a packet core gateway. ### Claim 16 (depends on 14) The one or more non-transitory computer readable storage media of claim 14, wherein a third endpoint is configured to obtain the one or more network attributes and provide the proactive indication to the second endpoint and the third endpoint is a packet core gateway. ### Claim 17 (depends on 14) The one or more non-transitory computer readable storage media of claim 14, wherein the one or more network attributes further include at least one of an address of the second endpoint and a port of the second endpoint. ### Claim 18 (depends on 1) The method of claim 1, wherein the verification tag being included in the abort chunk causes the second endpoint to not disregard the abort chunk and to request a subsequent network session based on the connection-oriented protocol. ### Claim 19 (depends on 18) The method of claim 18, wherein a subsequent verification tag is obtained from the second endpoint for the subsequent network session. ### Claim 20 (depends on 14) The one or more non-transitory computer readable storage media of claim 14, wherein the verification tag is obtained from the second endpoint.