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3GPP Decoder is an open source tool to decode LTE, UMTS and GSM messages, and protocols. The decoder uses Wireshark to decode most of the Layer 3 messages (RRC/NAS).
| Download 3GPP Decoder for Windows OS | 3GPP Decoder for Linux OS – Coming Soon |
Supported Protocols and Messages
| RAT | Message/PDU |
|---|---|
| LTE | RRC BCCH.BCH RRC BCCH.DL.SCH RRC DL.CCCH RRC DL.DCCH RRC PCCH RRC UL.CCCH RRC UL.DCCH NAS EPS |
| UMTS | RLC-AM RLC-UM NAS RRC BCCH.BCH RRC BCCH.FACH RRC DL.CCCH RRC DL.DCCH RRC DL.SHCCH RRC MCCH RRC MSCH RRC PCCH RRC UL.CCCH RRC UL.DCCH RRC UL.SHCCH RRC SIs (SIBs and MIB) |
| GSM | GAN TCP GAN UDP GSM CCCH GSM SACCH LLC NAS SNDCP SNDCPXID |
How to Install 3GPP Decoder?
3GPP Decoder is an open source tool to decode LTE, UMTS and GSM messages, and protocols. The decoder uses Wireshark to decode most of the Layer 3 messages (RRC/NAS). Download 3GPP Decoder for Windows OS 3GPP Decoder for Linux OS – Coming Soon Supported Protocols and Messages How to Install 3GPP Decoder? Prerequisite: Before installing 3GPP Decoder you need to (more.).
Prerequisite:
Before installing 3GPP Decoder you need to install Wireshark. Download Wireshark from this location: https://www.wireshark.org/download.html
When installing Wireshark, also install PCAP. (Wireshark will ask during installation if you want PCAP or not).
After installation checks the directory where Wireshark is installed.
Download 3GPP Decoder and then run the Setup.exe.
After installation, you need to check File >> Preference for Wireshark path. If not correct change it.
How to use 3GPP Decoder?
I have tried to keep the user interface simple. To decode a message just follow these steps:
1. Enter the HEX string in the top text box.
2. Select the access technology (LTE, UMTS or GSM). By default when the program starts it is selected as LTE
3. Select the message type from the drop down combo box
4. Press decode.
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Troubleshooting
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If for some reason you can not see any output, you may check the following.
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1. Correctly paste the HEX string and check if the selected message is correct
2. Check Wireshark path. Use the File >> Preference to set the Wireshark path.
3GPP Decoder Source Code
Get the source code from : https://github.com/panigrahip/3GPPDecoder
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Thanks Vincent Helfre for providing the original idea and code of 3GPP Decoder.