WO2000049814A1 - Point semaphore - Google Patents

Point semaphore Download PDF

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Publication number
WO2000049814A1
WO2000049814A1 PCT/DE2000/000450 DE0000450W WO0049814A1 WO 2000049814 A1 WO2000049814 A1 WO 2000049814A1 DE 0000450 W DE0000450 W DE 0000450W WO 0049814 A1 WO0049814 A1 WO 0049814A1
Authority
WO
WIPO (PCT)
Prior art keywords
sls
bits
signaling
signaling point
messages
Prior art date
Application number
PCT/DE2000/000450
Other languages
German (de)
English (en)
Inventor
Klaus David Gradischnig
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to DE10080390T priority Critical patent/DE10080390D2/de
Publication of WO2000049814A1 publication Critical patent/WO2000049814A1/fr

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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

Definitions

  • the present invention provides an advantageous solution to the problem b)
  • One solution to the second problem (b) is to find such a distribution of the SLS values on the links of a link set that the distribution is as uniform as possible, regardless of whether the SLS values used are now 5 or 8 bits long. Distributions with such property can be found, but it is unclear whether they can also be produced after link failures or link restorations without actually causing unnecessary shifts in traffic flows defined by SLS values. Methods for calculating such special distributions are also likely to be relatively complex.
  • Another solution to the second problem (b) is to define two distributions of the SLS values, one for messages with 5-bit SLS values, another for messages with 8-bit SLS values.
  • the problem arises, as the signaling point can see, that these messages only use a 5-bit SLS value, because between such a message and one in which the 8 bits can be used, but the three extra bits are zero, cannot be distinguished. If these messages come from directly adjacent signaling points, this can still be determined by simple administrative measures. However, if these messages can come from anywhere in the ZGS7 network, administration of this information becomes complex.
  • the present invention now solves the second problem in that it now applies to messages which have only 5-bit SLS Use values, expand the SLS value to 8 bits by adding the missing 3 bits.
  • additional information contained in the messages is used (e.g. address fields (OPC originating point code or DPC - destination point code - see appendix), for example, by a function generating three additional bits from the OPC and / or DPC, which are used for expansion of the SLS field can be used (see Fig.2).
  • Functions based on OPC and / or DPC have the advantage that they can be applied to all MTP messages independently of the respective MTP user.
  • the function used can e.g. depend on the location of the respective node in the MTP network, on the numbering strategy used by the MTP network operator or on the granularity of the load distribution desired by him.
  • An inventive step is that it is possible to extend received messages with only 5-bit SLS values to 8-bit SLS values in signaling points with STP functions.
  • a possible execution of the function is e.g. the exclusive OR combination of the three least significant bits of OPC and DPC and the insertion of the result into the SLS field of the relevant messages (see Fig. 3).
  • the exclusive OR combination makes the variability of the function independent of whether it is target-oriented (greater variability of the OPC) or close to origin (greater variability of the DPC).
  • the 3 bits generated from OPC and DPC are still with the possibly not set 3 bits of the received SLS field
  • the present invention also uses the address fields (OPC originating point code or DPC - destination point code) of the MTP messages for load distribution, in that a function generates a number of additional bits from the OPC and / or DPC, which can be used together with the SLS field for load distribution.
  • the function used can depend on the location of the respective node in the MTP network, on the numbering strategy used by the MTP network operator or on the granularity of the load distribution desired by him.
  • An essential inventive step is that an improvement of the load distribution locally where necessary (ie for example in a single node, for example in an STP - Signaling Transfer Point) without interworking or compatibility problems and without any change effort for the MTP users by using existing ones Information (ie the address information) which, with the exception of purely associated traffic relationships, has the necessary variability can be achieved.
  • Another essential step is the (possible) combination of OPC and DPC to increase the variability of the assumed values.
  • a possible execution of the function is e.g. the exclusive OR combination of the two lowest bits of OPC and DPC. Ideally, this results in a granularity of the load distribution of 64ths.
  • the exclusive OR combination makes the variability of the function independent of whether it is target-oriented (greater variability of the OPC) or close to origin (greater variability of the DPC).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

Comment se comporte un point sémaphore qui utilise des valeurs SLS de 8 bits lorsqu'il reçoit un message d'une valeur SLS de 5 bits? Dans le cas de messages n'utilisant que des valeurs SLS de 5 bits, on élargit selon l'invention la valeur SLS à 8 bits. En effet, une fonction (p.ex. à partir du code du point d'origine OPC- et/ou du code du point de destination DPC 3) génère des bits supplémentaires pouvant être utilisés pour l'extension du champ SLS.
PCT/DE2000/000450 1999-02-18 2000-02-17 Point semaphore WO2000049814A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10080390T DE10080390D2 (de) 1999-02-18 2000-02-17 Signalisierungspunkt

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19906812.7 1999-02-18
DE19906812 1999-02-18

Publications (1)

Publication Number Publication Date
WO2000049814A1 true WO2000049814A1 (fr) 2000-08-24

Family

ID=7897916

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/000450 WO2000049814A1 (fr) 1999-02-18 2000-02-17 Point semaphore

Country Status (2)

Country Link
DE (1) DE10080390D2 (fr)
WO (1) WO2000049814A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BIJAN JABBARI: "ROUTING AND CONGESTION CONTROL IN COMMON CHANNEL SIGNALING SYSTEM NO. 7", PROCEEDINGS OF THE IEEE,US,IEEE. NEW YORK, vol. 80, no. 4, 1 April 1992 (1992-04-01), pages 607 - 617, XP000304351, ISSN: 0018-9219 *

Also Published As

Publication number Publication date
DE10080390D2 (de) 2002-04-11

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