WO2000016565A1 - Vorfeldeinrichtung und verfahren zur steuerung derselben - Google Patents
Vorfeldeinrichtung und verfahren zur steuerung derselben Download PDFInfo
- Publication number
- WO2000016565A1 WO2000016565A1 PCT/DE1999/002762 DE9902762W WO0016565A1 WO 2000016565 A1 WO2000016565 A1 WO 2000016565A1 DE 9902762 W DE9902762 W DE 9902762W WO 0016565 A1 WO0016565 A1 WO 0016565A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signaling
- vfr
- exchange
- lps
- apron
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
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
Definitions
- the invention relates to an apron device which can be connected via a connection to a mother switch of a telecommunications network as an upstream device for connecting end connections of the network and can be controlled from there, and which can be connected to at least one local switch via at least one cross-link.
- the invention also relates to a method for controlling an apron device which, at least in the case of trouble-free operation, is connected via a connection to a motherboard of a telecommunications network as an upstream device for connecting end connections to the network and which is connected to at least one local exchange via at least one cross-section.
- Apron devices are used as a connection group for the end users of a local catchment area of a telecommunications network, in particular a telephone network, and take over the functions of the small or end exchanges previously used, the switching functions of which were brought together in central exchanges in the course of the changeover to digital telecommunications networks were.
- a front-end facility is connected to the central exchange assigned to it, which serves, among other things, as the parent exchange (* host switch ') for controlling the front-end facility, via a connection (remote switch trunk').
- the connections for the subscribers connected via the apron device and the control of the switching tasks of the apron device are established by the mother exchange via the connection.
- an apron facility is connected to other local exchanges via one or more so-called x back door trunks or cross routes; these local exchanges mostly belong to another telecommunications network, for example the network of another operator.
- the purpose of these routes is to allow certain services, such as an emergency number or an information service, to be established even in the event of a breakdown of the connection or the parent office; this is done via bypass routes using the cross sections.
- the cross sections are in the idle or standby mode during normal operation of the apron facility and mother exchange; the cross sections are only activated in the event that the apron device is cut off from the connection and / or control of the parent station. When signaling over the cross section, the apron device behaves in the manner of a switching center in relation to the local exchanges.
- the exchanges of a telecommunications network or network of telecommunications networks communicate with one another by means of specific intermediate office signals for control and Monitoring of the switching processes and the services performed and for managing the connections and connecting lines.
- interoffice signals in the form of signaling messages which are exchanged between the switching centers via so-called central channels, that is to say separate channels different from the user channels, and the form of which depends on the protocol used in each case.
- CCS7 Central Channel Signaling system No. 7
- ITU International Telecommunications Union
- the signaling messages are exchanged via signaling paths specially provided for this purpose.
- a switching center is equipped with a so-called signaling point to carry out the signaling tasks in the CCS7 system.
- the signaling points are networked via the signaling links to form a so-called central channel network, with each signaling point being assigned a position code (SPC, 'Signaling Point Code') for unique identification and addressing within the central channel network.
- SPC position code
- a signaling path is usually part of a useful path between two switching centers or at least runs in parallel with one useful path, i.e. connects the same exchanges.
- the signaling messages can not only be exchanged in the so-called associated signaling between an origin and a destination signaling points that are directly connected via a signaling link, but the signaling as so-called quasi-associated signaling can also be carried out via others that function as intermediate nodes Signaling points take place.
- the signaling functions are based on a so-called straightening transmission device on the one hand and distributed to user parts based on it on the other.
- a message transmission device such as the so-called MTP ('Message Transfer Part') of the CCS7 system, is a user-independent transport system which serves to exchange messages in the central channel system. As such, it offers a uniform transport frame for all types of signaling that can be used in the central channel system, in which the actual useful information of the interim signaling is embedded.
- the application parts contain the application-related functions of the central channel system, which are used to process the useful information for inter-office signaling and which are at least partially specific to the telecommunications network or telecommunications service under consideration;
- Examples in the CCS7 system are, for example, the telephone user part (TUP, 'Telephone User Part') and the ISDN user part (ISUP, 'ISDN User Part').
- the existing central channel protocol especially CCS7-. Protocol that would have to be changed via a local exchange connected via a cross-link.
- apron device with a message transmission device of a central channel system for exchanging signaling messages with the at least one local exchange via at least one signaling link, which is provided in each case in a transverse link, in the event of a fault in the parent switch and / or the connection connection, the message transmission device can be put into operation and, by means of the message transmission device, switching tasks for the end connections of the apron device can be controlled.
- the solution according to the invention enables the use of central channel signaling, in particular according to the CCS7 system, for the realization of cross sections without having to set up an entire signaling point in the apron device.
- the protocol of the message transmission device e.g. the CCS7 protocol without any expansion and can easily take over the signaling exchange with the local exchanges.
- the local exchanges can both network nodes of their own network, e.g. another apron device, as well as another telecommunications network.
- one or more local exchanges can be connected and one or more transverse links or one or more signaling links can be provided by the apron device. If, for the sake of brevity, and also in the claims, we speak of "local exchanges", “signaling links” or “cross links”, the case should always be the same included that there is only one local exchange, one signaling link or one cross link.
- the message transmission device is in the undisturbed operation of the parent exchange or the connection in the standby or idle state, since in this case the entire interim signaling takes place via the parent station anyway.
- the apron device is expediently set up to - due to the malfunction of the mother exchange and / or the
- the apron device can be connected to local exchanges outside the telecommunications network, namely to another telecommunications network, in order to offer the network subscribers at least some of the offered telecommunications services via a partner network.
- a reduced set of functions of the signaling network level for carrying out associated signaling is advantageously provided in the message transmission device. Since only the signaling to the local exchanges connected via the cross links is required to implement the telecommunications service in the event of a control fault. is necessary, a reduction in effort in the implementation and maintenance of the message transmission device can be achieved in this way.
- the above object is achieved by a method of the type described at the outset, in which, in the event of a fault in the mother exchange and / or the connection, a communication device of a central channel system is put into operation by the apron device and with the aid thereof
- Signaling messages are exchanged with the at least one local exchange via at least one signaling link, which is provided in each case in a transverse link, and switching tasks for the end connections of the apron device are controlled.
- a preferred variant of this method according to the invention achieves a "smooth" transition to operation independent of the mother position in the event of a malfunction in that the apron device
- the message transmission device is started up independently due to the fault in the mother exchange and / or the connection,
- the signaling links assigned to the cross links are activated for the exchange of signaling messages in accordance with the protocol of the central channel system, and - for their end connections, the tasks of a switching with their own job code are carried out compared to the local switches connected via the associated cross links.
- the local exchange due to the activation of a signaling route between the apron device and a local exchange, the local exchange the position code of the apron device signaling is switched over to the transverse route. This is conveniently done by giving top priority to the local exchange for the cross route.
- the message transmission device uses a reduced set of functions at the signaling network level to carry out associated signaling.
- a central channel system is understood here to mean a signaling system which has intermediate office signaling which is at least logically separated from user channels. It is of minor importance for the invention whether the signaling routes provided for the inter-office signaling are different from the useful connection routes or even form a separate signaling network. It is also irrelevant whether the signaling links are implemented, for example, by means of their own physical connections or, for example, as part of an intermediate interface with user channels, of which certain channels are used permanently or temporarily as signaling channels.
- a mother exchange HST of a telephone network TKN is shown, to which an apron device VFR is connected via a connection connection RST.
- the apron switch VFR may have replaced an earlier local switch and now supplies the end connections EAS of this local dialing circuit.
- Other telephone subscribers in the TKN network are connected to the parent exchange HST, for example via direct end connections DES.
- exemplary position codes SPC assigned to the network nodes are shown in the figure.
- the mother exchange HST is assigned a job code 11.
- the mother exchange HST is networked with other exchanges HST 'of the TKN network. Furthermore, there is access to a partner network via a gateway GTW, e.g. another operator's telephone network.
- a gateway GTW e.g. another operator's telephone network.
- an exchange LPS is shown in the figure, which serves the connections PES of the subscribers of a dialing circuit of the partner network. It is assumed that this "local dialing circuit" of the partner network is geographically overlapping or adjacent to the local circuit of the apron facility VFR.
- the local exchange LPS is assigned its own job code, e.g. job code 13 as in the figure.
- a call connection to a subscriber PES of the partner network dialing circuit is desired by one of the “local loop subscriber” EAS
- the PTN is established and connected to the local loop participant via the apron facility VFR.
- the routing via the parent exchange HST takes place because the functions necessary for setting up, receiving, dismantling and monitoring, including charging, are located there, while the apron facility VFR - at least in normal operation - primarily as Connection node for the local district participant EAS serves. This is also the reason why, as mentioned above, the position code of the apron device VFR is transmitted to the parent position HST.
- local dialing circuit or "local exchange” are selected only with regard to the exemplary embodiment and do not relate to the catchment area of the LPS exchange of the partner network; Rather, “local” here denotes the special relationship to the apron facility VFR, to which the local exchanges have moved into an at least imaginary neighborhood relationship due to the cross routes explained below. This can be seen regardless of the fact that, for reasons of economy, cross links are often precisely between neighboring network nodes are pulled with regard to their location or catchment area.
- the apron device VFR In the event of a control fault in which, as in the figure, symbolized by a wavy line, the apron device VFR is cut off from the control by the parent station HST, e.g. in the event of a cable break in the connection connection RST, the apron device VFR should now maintain emergency operation for its subscribers EAS.
- the purpose of this emergency operation is, in particular, special services SDD such as continue to offer an emergency call to the fire brigade or an information service to the local district participants EAS. In normal operation, these services would be accessible via the mother station or another network node of the own network TKN; this way is not possible due to the fault situation.
- special services SDD such as continue to offer an emergency call to the fire brigade or an information service to the local district participants EAS. In normal operation, these services would be accessible via the mother station or another network node of the own network TKN; this way is not possible due to the fault situation.
- “Alternative route” is a cross-section BDT to the local exchange LPS, via which the apron device VFR has access to at least the special services SDD of the partner network in the event of a control fault.
- a message transmission device MTE is on the side of the Apron device VFR is provided, which is in a standby state during normal operation and is only activated when the fault situation occurs.
- the fault is recognized in a known manner as soon as the exchange of control messages breaks down with the parent station HST via the connection connection RST;
- the apron device VFR automatically and automatically activates the message transmission device MTE, ie without signaling to other exchanges.
- the local exchange LPS After commissioning, it carries out the exchange of signaling messages with the local exchange LPS.
- a so-called F-Link FLN is set up in the cross link BDT, which serves as a signaling link for the associated signaling between the apron device VFR and the local exchange LPS.
- the number of cross sections consisting of the apron device VFR under consideration can assume any value from one upwards.
- a network node of another telecommunication network such as the switching LPS of a partner telephone network PTN
- another exchange of the own network TKN can also be connected as a local exchange to the apron device VFR under consideration as a local exchange.
- a further possibility is not least that in which another apron device VFR 'is connected via a transverse link BDT'; this can belong to your own or a foreign network.
- An apron device VFR connected via a transverse link BDT 'and thus serving as local exchange LPS' is advantageously assigned to another exchange HST 'than the parent HST, as indicated in the figure.
- the apron device VFR thus activates the message transmission device MTE and likewise the F-links FLN of the cross sections BDT, BDT 'for the exchange of signaling messages of the CCS7 system.
- the front-end facility VFR now performs the tasks of a switch for the local circuit end connections EAS with a separate job code SPC with respect to the local switches LPS '.
- the apron device VFR receives its own job code, e.g. in the figure, a job code 12. In normal operation, the interim signaling for this job code is routed to the parent job HST.
- the mother switching HST is also assigned the job code 12 of the apron device VFR, so that the mother site can be addressed by its own job code 11 and that of the apron device VFR.
- LPS the cross links BDT, BDT' e.g. given the highest priority, but in any case a higher priority than that of the signaling connections that lead to the parent exchange HST.
- LPS Mother switchboard HST and the prioritization of the cross links on the part of the local switches LPS, LPS 'make it possible to automatically transfer the control of the useful links in the event of a control fault to the apron device VFR and to return them to the mother station HST when normal operation is restored.
- the signaling paths to the parent station HST are no longer “covered” with the location code 12, and the corresponding signaling of the local exchanges LPS, LPS 'is again passed to the parent exchange HST, which, in the sense of normal operation, carries out the corresponding switching tasks with the apron device VFR via the connection connection RST carries out.
- the switching tasks for the end connections EAS of the apron device VFR can be controlled in an independent operation of the apron device VFR, the connection to other switching centers now via the cross sections and the local switches that they connect to the apron device VFR LPS takes place.
- the switchover succeeds on the basis of the invention regardless of whether the local exchange LPS is an independent exchange or a front-end facility.
- reliable emergency operation also takes place in the special case that a transverse link BDT 'is drawn between two apron devices VFR, VFR' according to the invention and both apron devices, which serve as local exchanges in the sense of the invention, the connection to their respective parent exchange HST, HST 'have lost.
- the top level of the functional architecture namely the level of the so-called signaling network functions (“level 3”) according to the above-mentioned ITU standards, can be equipped with a reduced set of functions in the message transmission device MTE.
- the intended function set is the associated one Signaling via the F-Links FLN of the cross sections guaranteed.
- the levels below the signaling network level are not affected by the invention and are also used to carry out the associated signaling in its entirety. In the case of the MTP of the CCS7 system, these levels are known to be the levels of the so-called signaling link functions ("level 2") and signaling transmission functions ("signaling data link functions";"level1").
- the functions of the signaling network level can, for example, be reduced to the following functions:
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephonic Communication Services (AREA)
- Exchange Systems With Centralized Control (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59914438T DE59914438D1 (de) | 1998-09-16 | 1999-09-01 | Verfahren zur steuerung einer vorfeldeinrichtung |
| EP99953675A EP1114559B1 (de) | 1998-09-16 | 1999-09-01 | Verfahren zur steuerung einer vorfeldeinrichtung |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19842448.5 | 1998-09-16 | ||
| DE19842448 | 1998-09-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000016565A1 true WO2000016565A1 (de) | 2000-03-23 |
Family
ID=7881187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1999/002762 Ceased WO2000016565A1 (de) | 1998-09-16 | 1999-09-01 | Vorfeldeinrichtung und verfahren zur steuerung derselben |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1114559B1 (de) |
| CN (1) | CN1174639C (de) |
| DE (1) | DE59914438D1 (de) |
| ES (1) | ES2292256T3 (de) |
| WO (1) | WO2000016565A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6950509B2 (en) | 2001-10-22 | 2005-09-27 | Siemens Aktiengesellschaft | Method for determining a free connecting line in a switching center having a number of subscriber access units |
| US7321586B2 (en) | 2001-02-01 | 2008-01-22 | Siemens Ag | Method for establishing communication links in an exchange in a switching system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0592153A2 (de) * | 1992-10-09 | 1994-04-13 | AT&T Corp. | Fernmeldenetz mit redundanten SS7 Signalisierungsschnittstellen |
| EP0840530A2 (de) * | 1996-10-29 | 1998-05-06 | Nortel Networks Corporation | Anrufbearbeitung in einem Fernmeldenetz |
-
1999
- 1999-09-01 EP EP99953675A patent/EP1114559B1/de not_active Expired - Lifetime
- 1999-09-01 DE DE59914438T patent/DE59914438D1/de not_active Expired - Lifetime
- 1999-09-01 WO PCT/DE1999/002762 patent/WO2000016565A1/de not_active Ceased
- 1999-09-01 ES ES99953675T patent/ES2292256T3/es not_active Expired - Lifetime
- 1999-09-01 CN CNB998109924A patent/CN1174639C/zh not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0592153A2 (de) * | 1992-10-09 | 1994-04-13 | AT&T Corp. | Fernmeldenetz mit redundanten SS7 Signalisierungsschnittstellen |
| EP0840530A2 (de) * | 1996-10-29 | 1998-05-06 | Nortel Networks Corporation | Anrufbearbeitung in einem Fernmeldenetz |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7321586B2 (en) | 2001-02-01 | 2008-01-22 | Siemens Ag | Method for establishing communication links in an exchange in a switching system |
| US6950509B2 (en) | 2001-10-22 | 2005-09-27 | Siemens Aktiengesellschaft | Method for determining a free connecting line in a switching center having a number of subscriber access units |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2292256T3 (es) | 2008-03-01 |
| CN1318259A (zh) | 2001-10-17 |
| DE59914438D1 (de) | 2007-09-13 |
| CN1174639C (zh) | 2004-11-03 |
| EP1114559B1 (de) | 2007-08-01 |
| EP1114559A1 (de) | 2001-07-11 |
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