Abstract: A method for providing for optimized service based interface (SBI) communications by performing network function (NF) fully qualified domain name (FQDN) resolution at an NF repository function (NRF) includes, at an NRF including at least one processor, receiving NF register requests including NF profiles and/or NF service profiles, at least some of which include FQDNs and do not include Internet protocol (IP) addresses. The method further includes storing the NF profiles and/or NF service profiles in an NF profiles database. The method further includes resolving the FQDNs in NF profiles and/or NF service profiles into IP addresses. The method further includes receiving NF discovery requests. The method further includes generating lists of NF profiles and/or NF service profiles that match query parameters in the NF discovery requests. The method further includes providing the lists of NF profiles and/or NF service profiles including the IP addresses to consumer NFs in NF discovery responses.

Abstract: A method, apparatus, and computer program product for trickplay in HTTP live streaming (HLS), includes: establishing a connection to a content source; receiving a piece of content from a content source as a multimedia stream, wherein the multimedia stream comprises a digital living network alliance stream; converting the multimedia stream into a client stream that comprises a HLS stream, the HLS stream including a manifest file containing a plurality of transport stream packets; storing a pre-determined number of the plurality of transport stream packets in a temporary storage; outputting the client stream to a media player; receiving a first trickplay request from the media player, the first trickplay request being a pause request; in response to the first trickplay request: pausing the client stream; transmitting a signal keeping the connection to the content source alive and the multimedia stream active; and storing the multimedia stream in the temporary storage.

Abstract: A method for optimized routing of service based interface (SBI) request messages to remote network function (NF) repository functions (NRFs) using indirect communications via a service communication proxy (SCP) includes, at an SCP including at least one processor, receiving an SBI request message. The method further includes forwarding the SBI request message to a remote NRF. The method further includes determining that the remote NRF is unable to process the SBI request message, and, in response to determining that the remote NRF is unable, identifying a georedundant mate of the remote NRF. The method further includes forwarding the SBI request message to the georedundant mate NRF of the remote NRF that is unable to process the SBI request message.

Abstract: Methods and set-top boxes are disclosed for automated error detection. The method includes detecting, on an electronic device, a display device connected to the electronic device via a cable; identifying, on the electronic device, a type of display device connected to the electronic device via the cable; classifying, on the electronic device, the type of display device connected to the electronic device via the cable as one of a specific television model or a regular television model; and executing, on the electronic device, a fix for the specific television model. The method can include detecting, on an electronic device, a HDMI cable-related error from a HDMI transmitter of the electronic device; classifying, on the electronic device, a cause of the HDMI cable-related error from the HDMI transmitter; and communicating, by the electronic device, a recommendation to a user to remedy the HDMI cable-related error detected by the HDMI transmitter.

Abstract: A method for automatic configuration and use of Category 1 message filtering rules includes, at a network function (NF), subscribing, with an NF repository function (NRF), to receive notification of NF profile changes. The method further includes receiving, from the NRF and as a result of the subscribing, notification of an NF profile change. The method further includes automatically configuring, based on the notification of the NF profile change, at least one Category 1 message filtering rule implemented. The method further includes using the at least one Category 1 message filtering rule to filter service based interface (SBI) messages.

Abstract: The customer premises equipment apparatus includes a communication component, a determining component and a filtering component. The communication component pulls a first chunk of headend guide data from a headend guide data provider using HTTP streaming. The first chunk of headend guide data contains a plurality of frames, some of which may be filler frames. The determining component determines whether at least one of the frames within the first chunk of headend guide data includes filler frames. The filtering component removes the frames that correspond to filler frames.

Abstract: A method for resolution of inter-network domain names between telecommunications networks includes storing, at a security edge protection proxy (SEPP) of a home network, a mapping between a domain name and a network address of a producer network function of the home network. The method includes receiving, at the SEPP of the home network, a request message from a consumer network function of a visitor network. The method includes resolving, at the SEPP of the home network, a request message domain name of the request message using the mapping between the domain name and the network address of the producer network function of the home network.

Abstract: A method for mitigating network function (NF) update and deregister attacks includes, at an NF repository function (NRF) implemented by at least one processor, receiving, from an NF, an NFRegister request including a hash of a first authentication string, an NF instance identifier, and an NF profile. The method further includes storing the hash of the first authentication string. The method further includes registering the NF by storing the NF profile in an NF profile database. The method further includes receiving a first NFUpdate or NFDeregister request including the NF instance identifier. The method further includes using the stored hash of the first authentication string to validate or reject the first NFUpdate or NFDeregister request.

Abstract: Methods, systems, and computer readable media for network function (NF) discovery using preferred-locality information are disclosed. One example method for NF discovery using preferred-locality information comprises: at a first NF comprising at least one processor: receiving a message relating to a transaction involving a consumer NF; identifying, from the message, an NF instance identifier (ID) corresponding to the consumer NF; determining, using the NF instance ID and a data store including NF related information and corresponding preferred-locality information, a preferred-locality value; including the preferred-locality value in a preferred-locality information element (IE) of an NF discovery request; and transmitting the NF discovery request toward a second NF.

Abstract: A method for communicating delegated NF discovery results between SCPs and using the delegated NF discovery results for alternate SBI service request routing includes receiving, at a first SCP and from a consumer NF instance, an SBI service request. The method further includes determining that delegated NF discovery is required, and, in response, performing delegated NF discovery on behalf of the consumer NF instance. The method further includes receiving an NF discovery response including delegated NF discovery results. The method further includes sending the SBI service request including the delegated NF discovery results to a second SCP.

Abstract: A method for automatic domain name system (DNS) configuration for 5G core (5GC) network functions (NFs) includes, at an NF repository function (NRF) including at least one processor, receiving a message concerning a 5GC network function. The method further includes determining a first DNS resource record parameter for the 5GC NF. The method further includes determining a second DNS resource record parameter for the 5GC NF. The method further includes automatically configuring a DNS with a mapping between the first and second DNS resource record parameters for the 5GC NF.

Abstract: A method for routing inter-public land mobile network (inter-PLMN) messages relating to existing subscriptions with a network function (NF) repository functions (NRFs) includes, at a security edge protection proxy (SEPP) implemented using at least one processor, automatically populating, by the SEPP, a subscription identifier to target NRF resource identification information mapping database accessible to the SEPP with mappings between subscription identifiers and target NRF resource identification information. The method further includes receiving an inter-PLMN message for modifying or deleting a subscription. The method further includes reading a subscription identifier from the message for modifying or deleting the subscription. The method further includes using the subscription identifier from the message for modifying or deleting the subscription to access the database and obtain an identifier associated with an NRF that created the subscription.

Abstract: A method for automatically managing a platform firewall using a network function (NF) repository function (NRF) or service communication proxy (SCP) includes receiving message relating to registering, updating, or deregistering an NF profile in an NF profiles database separate from a platform firewall. The method further includes determining that the registering, updating, or deregistering of the NF profile requires a change to a firewall rules configuration of the platform firewall. The method further includes, in response to determining that the registering, updating, or deregistering of the NF profile requires a change to the firewall rules configuration of the platform firewall, automatically updating, by the NRF or SCP, the firewall rules configuration of the platform firewall.

Abstract: A method for selective inter-PLMN security handshake validation includes receiving, at a SEPP, a first inter-PLMN security handshake request message. The method further includes performing, by the SEPP and in an SEPP trust relationship database, a lookup to determine whether the first inter-PLMN security handshake request message originates from a trusted SEPP. The method further includes determining that the first inter-PLMN security handshake request message does not originate from a trusted SEPP, and, in response, performing, by the SEPP, an inter-PLMN security handshake validation procedure on the first inter-PLMN security handshake request message. The method further includes determining that the first inter-PLMN security handshake request message fails the inter-PLMN security handshake validation procedure, and, in response, performing a network protective operation.

Abstract: A method for generating, conveying, and using attempted producer network function (NF) instance communication information includes, at a first service communication proxy (SCP), receiving, from a sender, a first service based interface (SBI) request message. The method further includes attempting to obtain a service requested by the first SBI request message from at least one producer NF instance. The method further includes receiving at least one error response or failing to receive a response from the at least one producer NF instance. The method further includes generating, from the at least one error response or the failing to receive a response from the at least one producer NF instance, attempted producer NF instance communication information. The method further includes communicating, to the sender, the attempted producer NF instance communication information.

Abstract: A method for providing for network function (NF) fallback to a recovered network function NF repository function (NRF) includes, at an NF including at least one processor, generating an NF register message including an indication to notify the NF of recovery of a first NRF after a failure of the first NRF. The method further includes transmitting the NF register message to the first NRF. The method further includes communicating with the first NRF and detecting failure of the first NRF. The method further includes, in response to detecting failure of the first NRF, initiating communications with a second NRF that is a geo-redundant mate of the first NRF. The method further includes receiving notification of recovery of the first NRF and falling back to communicating with the first NRF.

Abstract: A method for delegated authorization at a service communications proxy (SCP) includes intercepting, from a consumer network function (NF) that does not support access token based authorization, a service based interface (SBI) request. The method further includes operating as an access token authorization client to obtain a first access token on behalf of the consumer NF. The method further includes using the first access token to enable the consumer NF to access the service provided by a first producer NF that requires access-token-based authorization. The SCP may also function as an access token authorization server on behalf of an NRF that does not support access-token-based authorization.

Abstract: A method for error information propagation from a service communication proxy (SCP) to a consumer network function (NF) to support a circuit breaker design at the consumer NF includes receiving, at the SCP and from the consumer NF, a first service based interface (SBI) service request message. The method further includes attempting, by the SCP, to forward the first SBI service request to N producer NF instances, N being an integer of at least one. The method further includes detecting, by the SCP, an error involving the N producer NF instances. The method further includes performing, by the SCP, successful alternate routing of the first SBI service request message to an (N+1)th producer NF instance. The method further includes receiving, by the SCP, a success response message from the (N+1)th producer NF instance. The method further includes propagating, by the SCP, with the success response message and to the consumer NF, error information regarding the N producer NF instances.

Abstract: This disclosure describes the preparation and use of reactive carbonates containing a metal carbonate bound to a reactive compound, wherein the reactive compound comprises a mineral binding group and a polymer reactive group connected together by a linking group. Such reactive carbonates are useful as reagents in processes for making mineral-bound elastomeric materials, and in methods for reducing cavitation in elastomer materials.

Abstract: A system and method for automatically determining if certain operational states of a plurality of networked media appliances are causally connected with those appliances becoming unstable and/or having a software crash. Once these certain operation states are identified, a command prohibiting each of the networked media appliances from entering the identified state is generated and transmitted to the media appliances. The generated commands effectively insulate the media appliances entering the prohibited state, thereby eliminating a possible cause of a software crash without requiring the appliances to undergo a software update or the installation of a software patch.