Hello and sorry for my english. Please help me. I need to decode the message D-NWRK-BROADCAST (chapter 18.4.1.4.1 from ETSI EN 300 392-2 V2.3.2). The fact is that I want to receive information of neighboring cells, but do not know how to do it. Standard called following about this message: “Upon receipt from the SwMI, the message shall inform the MS-MLE about parameters for the serving cell…” How to modify the source code in order to decode this message. Thank you.
With best regards Zaytcev Andrey.
On 04/06/2011 04:45 PM, Зайцев Андрей wrote:
Hello and sorry for my english. Please help me. I need to decode the message D-NWRK-BROADCAST (chapter 18.4.1.4.1 from ETSI EN 300 392-2 V2.3.2). The fact is that I want to receive information of neighboring cells, but do not know how to do it. Standard called following about this message: “Upon receipt from the SwMI, the message shall inform the MS-MLE about parameters for the serving cell…” How to modify the source code in order to decode this message. Thank you.
Do you have a pcap file containing this message? Did you check if wireshark with tetra support is capable of decoding this?
06.04.2011 19:59, Holger Hans Peter Freyther пишет:
On 04/06/2011 04:45 PM, Зайцев Андрей wrote:
Hello and sorry for my english. Please help me. I need to decode the message D-NWRK-BROADCAST (chapter 18.4.1.4.1 from ETSI EN 300 392-2 V2.3.2). The fact is that I want to receive information of neighboring cells, but do not know how to do it. Standard called following about this message: “Upon receipt from the SwMI, the message shall inform the MS-MLE about parameters for the serving cell…” How to modify the source code in order to decode this message. Thank you.
Do you have a pcap file containing this message? Did you check if wireshark with tetra support is capable of decoding this?
I have no pcap file and i didn`t check in wireshark. I have a file with time sampling, i demodulated it and got the unpacked bits. Then I processed the bit stream with Receiver Program form this http://tetra.osmocom.org/trac/wiki/WikiStart#MailingList. But I exactly assured that there is the message D-NWRK-BROADCAST in the bit stream.
On 04/06/2011 06:29 PM, Зайцев Андрей wrote:
I have no pcap file and i didn`t check in wireshark. I have a file with time sampling, i demodulated it and got the unpacked bits. Then I processed the bit stream with Receiver Program form thishttp://tetra.osmocom.org/trac/wiki/WikiStart#MailingList. But I exactly assured that there is the message D-NWRK-BROADCASTin the bit stream.
You can ask the decoding program to send messages to the GSMTAP port, you can use tcpdump to record a trace and then look at it with wireshark (1.5.x from svn). The people of the Beijing-Institute-of-Technology were so kind to donate their dissector.
This link[1] points to the ASN1 file for the messages, it also provides the D-NWRK-BRDCAST sequence (if you refer for that one).
[1] http://anonsvn.wireshark.org/viewvc/trunk/asn1/tetra/tetra.asn?revision=3575...
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Holger Hans Peter Freyther -
Зайцев Андрей