WO2001031873A2 - Method for extending protocol fields - Google Patents
Method for extending protocol fields Download PDFInfo
- Publication number
- WO2001031873A2 WO2001031873A2 PCT/EP2000/010602 EP0010602W WO0131873A2 WO 2001031873 A2 WO2001031873 A2 WO 2001031873A2 EP 0010602 W EP0010602 W EP 0010602W WO 0131873 A2 WO0131873 A2 WO 0131873A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- extension
- mtp
- fields
- message
- protocol fields
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
- H04Q3/0025—Provisions for signalling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
Definitions
- SI Service indicator
- a solution that requires at most a change in the MTP in those nodes in which the new users of the MTP are actually located is therefore preferable.
- SIO Service Indicator Octet
- these two bits are already used for other purposes in national signaling networks (e.g. those according to ANSI Tl.111-1996). This internationally backward compatible approach would therefore be rejected in many countries and is therefore not suitable for a general solution to the problem.
- the invention shows how protocol fields for which there is no possibility of expansion can be expanded without this format change having to be implemented and interpreted in nodes which have to handle messages with protocol fields which have been expanded in this way.
- the present invention proposes to expand the SI field in such a way that this extension is not placed immediately after the existing SI field. Rather, according to the invention, it is only placed behind the end of the previously defined fields with protocol information, which are also evaluated in nodes which the new MTP users do not contain, that is to say, for example, immediately before the user data (see FIG. 1). This means that a simple modification of the MTP is only necessary in nodes that contain the new MTP users.
- the method disclosed by the invention is always possible if the said log fields only have to be interpreted in certain or a few nodes and there are still free values in the old log format which can be used to indicate that this expansion has been carried out.
- Such extensions are e.g. an advantageous extension of the SLS field or a future enlargement of the addresses (OPC and DPC).
- the described invention is not only applicable to the MTP but can of course be used to introduce extensions to protocol fields of other protocols, especially when these protocol fields only have to be interpreted in certain or a few nodes. This can also be done with or without the introduction of possibilities for a further, future expansion of the protocol formats. 4.
- a possible embodiment of the invention can be seen in FIGS. 1 and 2 for the SI field of the MTP at level 3:
- Figure 1 shows the value '1111', which is currently No MTP user identifies that there is an extended format message (shaded fields).
- the user data offset is set to '0010' to indicate that the format extension is 2 octets. Extensions up to a total of 15 ('1111') octets are e.g. possible.
- Another field is e.g. already planned for an expansion of the SLS value.
- the extended SI will identify a new MTP user. If the "SI extension” field is zero, then the "SI Basis” field contains the (only) 4-digit identification of a possibly already defined MTP user who applies the new message format, e.g. to use the extended SLS value or any other future extension.
- a User Part ID of '1111' indicates that an extended User Part ID (shaded) is used.
- the meaning of the fields of the extended user part ID also corresponds to that of the fields of the extended SI in FIG. 1.
- the more detailed meaning of the other fields, which is not important for the disclosed invention, is FIG. 1 or 3999ITU-T recommendation Q. 704.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Communication Control (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00975944A EP1224814A2 (en) | 1999-10-28 | 2000-10-27 | Method for extending protocol fields |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19952035 | 1999-10-28 | ||
DE19952035.6 | 1999-10-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001031873A2 true WO2001031873A2 (en) | 2001-05-03 |
WO2001031873A3 WO2001031873A3 (en) | 2001-11-15 |
Family
ID=7927233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/010602 WO2001031873A2 (en) | 1999-10-28 | 2000-10-27 | Method for extending protocol fields |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1224814A2 (en) |
WO (1) | WO2001031873A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8189620B2 (en) | 2005-02-25 | 2012-05-29 | Somfy Sas | Communication system with cross-compatibility and associated communication frame |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0411677A2 (en) * | 1984-12-31 | 1991-02-06 | Motorola, Inc. | Dispatch trunked radio system |
US5724515A (en) * | 1996-03-06 | 1998-03-03 | E. F. Johnson Company | Packet radio communication system |
US6002693A (en) * | 1997-06-04 | 1999-12-14 | Nortel Networks Corporation | Method and system for routing messages in a telecommunication network using an expanded signalling link selector field |
-
2000
- 2000-10-27 EP EP00975944A patent/EP1224814A2/en not_active Withdrawn
- 2000-10-27 WO PCT/EP2000/010602 patent/WO2001031873A2/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0411677A2 (en) * | 1984-12-31 | 1991-02-06 | Motorola, Inc. | Dispatch trunked radio system |
US5724515A (en) * | 1996-03-06 | 1998-03-03 | E. F. Johnson Company | Packet radio communication system |
US6002693A (en) * | 1997-06-04 | 1999-12-14 | Nortel Networks Corporation | Method and system for routing messages in a telecommunication network using an expanded signalling link selector field |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8189620B2 (en) | 2005-02-25 | 2012-05-29 | Somfy Sas | Communication system with cross-compatibility and associated communication frame |
Also Published As
Publication number | Publication date |
---|---|
WO2001031873A3 (en) | 2001-11-15 |
EP1224814A2 (en) | 2002-07-24 |
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