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What's New

Applies to: NAS/C++ LTE/EPC r15.5.0 v7.1.1

What's New in NAS/C++ v7.1.1

New Features

  • Support for NAS version 15.5.0 has been added.
  • An MNC value can consist of two or three digits. Previously, it was thought that a two-digit MNC value stored in a PDU was always represented by a string of size 3, where its digits were augmented with the padding space character. Now the encoder accepts MNC strings of size 2. The decoder now decodes a two-digit MNC value into a string of size 2 by default. The new OSSNAS_OLD_MNC_WITH_SPACE runtime flag restores the old decoder behavior (the decoded string is size 3 with a trailing space).
  • The new OSS NAS/C++ API method, binary2JSON(), is added. This method converts a binary NAS message to a JSON document.
  • The OSS NAS/C++ API binary2XML() and print() methods now produce an XML document in accordance with ITU-T Recommendation X.693: "Information technology ASN.1 encoding rules: XML Encoding Rules (XER)".

The following changes were implemented:

  • Each SEQUENCE OF SomeType element, where SomeType is a BOOLEAN type, is now represented as "true" or "false" instead of "<SomeType>true</SomeType>" or "<SomeType>false</SomeType>".
  • A SomeType ASN.1 type field, where SomeType is a NULL type, is now represented as "<SomeType/>". Previously, it could be omitted.
  • Each SEQUENCE OF SomeType element, where SomeType is a CHOICE type, is now represented as the corresponding CHOICE alternative. Previously, the alternative was additionally wrapped by <SomeType> and </SomeType> tags.

The new OSSNAS_OLDXML runtime flag restores the old behavior of the functions.


This documentation applies to the NAS/C++ Encoder Decoder Library for LTE/EPC v7.1.1 for 3GPP Release 15.5.0.

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