Hi William,
Thanks for the advice.
This is for a R&D project. We plan to
look at the feasibility of using Erlang/OTP platform for development. Currently
doing investigation on ASN.1 compiler on Erlang. I’m very new to ASN.1,
so find it difficult to capture some parts of the specification. The GSM/UMTS
MAP ASN.1 spec is alright. But I couldn’t still figure out how to use TCAP
ASN.1 spec can generate the TCAP Begin, Continue, End, etc message
encoding/decoding functions.
With help from some generous people out
there, I could understand that I will have to create the ASN.1 spec of mine or
find a standard spec, which will Instantiate the Parameterized Type specified
in the TCAP. If you could point me to a standard spec like that or give me a
sample how I could write something like that, would be very helpful. How to
blend the MAP and TCAP ASN.1 specs?
Thanks!
Eranga
From: William H.
Skelton [mailto:[EMAIL PROTECTED]
Sent: Friday, October 01, 2004
3:12 AM
To: [EMAIL PROTECTED]
Subject: Fwd: [OSS_ASN1] [ASN1]
ASN.1 Parameterized Types... pls help
Hi Eranga,
We found you can avoid some of the problems by using earlier TCAP
specifications, which are fully compatible (I think), but simpler.
Just as a matter of interest, is this a commercial or university project you
are working on? Are you building your own tools?
William
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Date: Wed, 29 Sep 2004 18:07:45 +0600
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Subject: [OSS_ASN1] [ASN1] ASN.1 Parameterized Types... pls help
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Hi All,
I'm finding difficult in absorbing "How to use ASN.1 TCAPMessage to
transport GSM MAP". The problem is how to generate TCAP Begin, Continue,
End, etc messages.
I read about the ASN.1 Parameterized Type, but still I could find the match of
ASN.1 specs for MAP and TCAP. I thought below might be the way, but still that
gives some compilation errors.
mapSpecificAS ABSTRACT-SYNTAX ::= {
MapSpecificPDUs
IDENTIFIED BY gsm-MessagingId
}
MapSpecificPDUs ::=
TCMessage{{ MAPOperations-Invokable}, { MAPOperations-Returnable}}
MAPOperations-Invokable OPERATION ::=
{sendRoutingInfoForSM | mo-ForwardSM |
mt-ForwardSM}
MAPOperations-Returnable OPERATION ::=
{reportSM-DeliveryStatus | alertServiceCentre |
informServiceCentre | readyForSM}
The error is as below (Erlang ASN.1 compiler),
{error,{asn1,[{error,{type,57,
'TCAPMessages',
'MapSpecificPDUs',
{asn1,{duplicates_of_the_tags,
[{'UNIVERSAL','INTEGER'}]}}}}]}}
For your information, I have attached TCAPMessages.asn and
MAP-ShortMessageServiceOperations.asn.
I appreciate if anybody out there can give me some clue to solve this problem.
Thanks in advance!
Eranga
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