OSS NAS Tools - URSP Support

 The OSS NAS Tools now support encoding/decoding of URSP (UE Route Selection Policy) information within a NAS message (3GPP TS 24.526 Release 16.8.0). URSP is a network slice feature that provides a way to manage network slice information for the UE.

The URSP messages are transported in the UE Policy Container of the Uplink/Downlink NAS Transport, RegistrationRequest, or ContainerEntryUL message type. In earlier versions of the NAS Tools, the container value was decoded as an octet string. The UE policy message can now be fully decoded into a UE Policy Management message structure/object.

The UE Policy Container contains a UE Policy Management message that can be one of the following types: 

• Manage UE Policy Command

• Manage UE Policy Complete 

• Manage UE Policy Command Reject 

• UE State Indication 

• UE Policy Provisioning Request 

• UE Policy Provisioning Response

The decoding of the URSP message is done in two steps. In the first step, the top-level NAS message is decoded. In the next step, the UE Policy Container is decoded to a UE Policy Management message structure/object from its octet string value that was obtained from the first decoding step of the top-level message.

For more technical details, please review the URSP sample (nas_ursp) located under the samples/ directory of the OSS NAS Tools.

What's New in 2023

OSS Nokalva is ready to support our customers in 2023 with tools that work in diverse, often complex, environments that require flexibility and reliability. For those working in rapidly evolving sectors, such as 5G and ITS (Intelligent Transportation Systems), OSS is equipped to deliver solid, dependable solutions.

As ITS standardization continues at a rapid pace, milestones in this generational technology happen regularly. Now that 3GPP Release 17 has been finalized, development and deployment activities can progress in earnest. Moving forward, 3GPP will be working on Release 18 in 2023 and 2024. The OSS ASN.1 and NAS tools will continue to support new 3GPP and ITS standards.

OSS ASN.1 Tools

In 2023, OSS has released new versions of the OSS ASN.1 Tools that include the following new features and enhancements:

• 3GPP Release 17 support and samples

• ASN.1 Value Notation (AVN) encoding/decoding support in the ASN.1/C, ASN.1/C++, ASN./Java, and ASN.1/C# TOED runtimes

• Convert ASN.1 binary encodings to AVN and vice versa

• Memory Handling API support in the ASN.1/C RTOED runtime

• Detect unknown extensions in SEQUENCE, SET, CHOICE (available in the ASN.1/C, ASN.1/C++, and ASN.1/Java Tools)

• Convert ASN.1 binary messages to CSV and vice versa in the ASN.1/C, ASN.1/C++, and ASN.1/Java SOED runtimes

• Convert binary data that represents Binary-Coded Decimal (BCD) numbers and IP addresses to standard text format and vice versa

OSS NAS Tools

The OSS NAS/C, NAS/C++, NAS/Java, NAS/C# Tools and NAS-1Step Tools will be upgraded to the latest versions of LTE and 5G Release 17. Support for 3GPP Release 18 will be added when it is available.

NEW Web App Subscription Plans

OSS Nokalva now offers subscription plans for our expanding suite of web apps, ASN.1 IO. These helpful apps complement your current ASN.1 or NAS Tools and we encourage you to give them a try. 

ASN.1 Playground	Compile, Encode, Decode	Provide your schema or use a standard one to encode or decode your data.
ASN1DOC	Document your schema	Create an HTML document from your schema with a few clicks.
Schema Analyzer	Improve your schema	Multiple rules across multiple categories can be used to improve your schema.
NAS Playground	Decode NAS Messages	Troubleshoot your NAS messages by converting them from binary to text.
PKI/DER Inspector	Inspect crypto data	Troubleshoot certificates, keys and other PKI data.
CDR Inspector	Call Data Records Decoder	Troubleshoot your CDR, detect BER encoding errors, find issues with schema, etc.
ASN.1 Python	Python all-source	Get the data bindings for your schema, encode, decode, validate your data.
JSON/Schema2ASN	Have JSON? Get ASN.1	Infer an ASN.1 schema from JSON with a few clicks.
Proto2ASN	Migrate Proto schema into ASN.1 schema	Try an international standard alternative for Google Protocol Buffers.
ASN1VSIX	Microsoft Visual Studio extensions	Install this ASN.1 extension for your Visual Studio family of products to add an ASN.1 schema syntax highlighter and validator, with IntelliSense.

Please contact us at info@oss.com with any questions about the OSS ASN.1 Tools, OSS NAS Tools, and the new Web App subscription plans.