EP1216582A1 - Liberation forcee de canaux de priorite inferieure en cas de surcharge de reseau - Google Patents

Liberation forcee de canaux de priorite inferieure en cas de surcharge de reseau

Info

Publication number
EP1216582A1
EP1216582A1 EP00963989A EP00963989A EP1216582A1 EP 1216582 A1 EP1216582 A1 EP 1216582A1 EP 00963989 A EP00963989 A EP 00963989A EP 00963989 A EP00963989 A EP 00963989A EP 1216582 A1 EP1216582 A1 EP 1216582A1
Authority
EP
European Patent Office
Prior art keywords
transmission
information
transmission resources
access
switching device
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.)
Withdrawn
Application number
EP00963989A
Other languages
German (de)
English (en)
Inventor
Wilhelm Aures
Friedrich Stippel
Axel Kreten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Siemens AG
Nokia Siemens Networks GmbH and Co KG
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 AG, Nokia Siemens Networks GmbH and Co KG filed Critical Siemens AG
Publication of EP1216582A1 publication Critical patent/EP1216582A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/002—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
    • H04Q3/545—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised using a stored programme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2242/00—Special services or facilities
    • H04M2242/04—Special services or facilities for emergency applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13103—Memory
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13104—Central control, computer control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13176—Common channel signaling, CCS7
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1325—Priority service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13271—Forced release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13342—Arrangement of switches in the network

Definitions

  • V ent and communication arrangement for controlling access to transmission resources of a communication network.
  • Current telecommunication networks are formed from communication devices, switching devices and wired or line-bound and wireless connections connecting these devices, the switching devices - also referred to as network nodes - at the switching devices - the communication devices assigned to individual subscribers, e.g. Telephone devices or personal computers - are connected.
  • the switching devices - also referred to as network nodes - at the switching devices - the communication devices assigned to individual subscribers, e.g. Telephone devices or personal computers - are connected.
  • connections can be made directly via the shared network node.
  • the individual network nodes need to be networked.
  • the networking can be designed in such a way that the telecommunications network is divided into hierarchical levels in several stages.
  • a route through the telecommunications network to the selected destination ie to the corresponding network node of the destination connected to it, must be made Participant or B participant can be determined.
  • the aim of this route search is to determine the shortest possible route within the telecommunications network, with as few network nodes as possible being traversed in the course of the connection to the selected destination.
  • Another goal of the route search is the optimal use of the connecting lines of the telecommunication network.
  • the method for the optimal route search by a tele- Communication network is also referred to as traffic control or routing.
  • connection of each two in the telecommunications network reasonable associated network node is equivalent on a limited number of under ⁇ each other, realized wired or wireless lines or transmission channels.
  • Several equivalent lines or transmission channels directed to the same destination are also referred to as “bundles” or “line bundles”.
  • serial technologies to transfer ⁇ based telecommunications networks Kraftsbundel are formed by a certain number of time-multiplexed transmission channels o ⁇ ent Being - also referred to as PCM highways.
  • Digital switching devices arranged in current telecommunication networks - for example a "EWSD" digital switching system from Siemens AG - are based on a digital switching network and a coordinating control system which is supported by peripheral processors.
  • the switching system has a modular structure, ie around a central core of coordination processor, switching matrix and clock generator, the connection groups for the external lines - such as subscriber lines and connecting lines - are connected as required. All useful connections are switched via the switching network, the route search through the switching network being carried out by the coordination processor.
  • the connection group forms the interface for connecting the external lines.
  • the line trunk groups each comprise several line units - also referred to as subscriber line units in the following - for adapting the external lines, including the PCM coding, to an internal system interface.
  • the subscriber line unit assigned to a line group concentrates the subscriber traffic from connected analog and digital subscriber lines and from connected connection lines for private branch exchanges.
  • Subscriber line units can be arranged locally as part of the network node in a switching facility or remote therefrom in the vicinity of subscriber groups. Remote subscriber line units are also referred to as apron facilities.
  • the short subscriber lines achieved with the aid of apron devices and the concentration of the subscriber traffic in the direction of the network node on digital and optical transmission links result in an economical configuration of the subscriber access network with an optimal transmission frequency.
  • a number of destinations in the form of emergency call stations are set up, e.g.
  • Police or fire brigade units - which can be reached by any subscriber in the telephone network by transmitting generally uniform destination or dialing information or telephone numbers nationwide.
  • Current telephone networks are designed in such a way that a requested emergency call connection to the respective emergency call point assigned to the subscriber, for example the emergency call point closest to the calling subscriber, is forwarded or routed. Since emergency calls always arise from an acute emergency situation of a subscriber or multiple subscribers - apart from misuse or error - such emergency calls within the telephone networks are to be given the highest priority to the corresponding emergency call center. This requirement applies to normally used telephone networks, but it applies in particular if the telephone network is fully utilized by normal telephone traffic due to certain events or appointments.
  • a typical one An event of this kind is represented, for example, by the turn of the year, in which the transmission of a large number of "congratulations calls" means that the transmission resources provided by the telephone network are fully utilized, but at the same time there is an increased need for high-pored emergency call connections to be switched - for example reporting personal injury or property damage caused by fireworks.
  • Telephone networks are known to reserve a portion of the transmission resources provided by the telephone network.
  • the "Selective Circuit Reservation Control" feature implemented in the switching facilities or switching centers achieves a targeted treatment of emergency call connections to be switched to emergency call points, with a number of lines or connection channels being kept free in certain line bundles, so that only connections with certain traffic criteria - e.g. Emergency call connections - the entire line bundle is available.
  • the permanent reservation of transmission resources achieved explicitly for emergency call connections has the disadvantage that the transmission resources provided overall for the transmission of information within the telecommunications network are restricted, in particular if the reserved transmission resources are currently not being used for the transmission of emergency calls. As a result, optimal use of the transmission resources provided is not possible. Furthermore, when the telecommunications network is fully utilized - ie all transmission resources provided for non-high-pore connections are occupied - only the reserved transmission resources are available for the high-pore-emergency calls to be switched, which in turn means a restriction.
  • the invention is based on the object of improving the switching of emergency call connections within telecommunications networks and, in particular, of guaranteeing the switching of high-priority connections, such as emergency call connections to corresponding emergency call points, independently of the respective utilization of the transmission resources provided by the communication network.
  • the problem is solved on the basis of a method and a communication arrangement according to the preamble of claims 1 and 12 by their characterizing features.
  • the method according to the invention for controlling access to transmission resources of a communication network for the transmission of information when the communication network is accessed, a check is carried out to determine whether the amount of transmission resources required for the information transmission is currently available in the communication network.
  • the essential aspect of the method according to the invention is that if an insufficient amount of currently available transmission resources is found for the transmission of information, the priority of the access is determined and that the transmission resources required for the transmission of information are made available in the communication network if the access priority is determined to be high become.
  • the main advantage of the method according to the invention is that, for example, emerge from an acute emergency situation of one or more participants high-priority connection requests - e.g. emergency calls - are guaranteed to be conveyed to the appropriate destination - e.g. an emergency call center - within the technical possibilities and regardless of the current load on the transmission resources of the communication network.
  • Availability checked ⁇ standing transmission resources all communicable transmission resources are treated within the communication network similarly.
  • the emergency call connections are switched independently, ie without administrative intervention - for example by setting an identifier representing the disaster condition in the switching devices - with the highest priority to the destination or to the emergency call point.
  • no reservation of transmission-technical resources for emergency call connections is necessary, so that no restriction of transmission resources is caused by the method according to the invention.
  • the priority of the access is advantageously determined with the aid of target information transmitted as part of the current access and / or as part of the current access and representing the type of information to be transmitted.
  • the priority of the allocated transmission resources can be determined by the type of the transmitted information - claim 3.
  • This advantageous embodiment of the method according to the invention enables the priority of access to the transmission resources, for example, from signaling or dialing information transmitted when a connection is set up be derived.
  • the priority of the access can be derived from an identifier, for example representing the type of traffic of the information to be transmitted.
  • the transmission resources are between switching devices arranged in the communication network and / or between a switching lungseinnchtung of the communication network and at least one in the subscriber access area of the switching device ⁇ arranged run-up device being arranged - to claim 8.
  • the Verfugbarmachung represents my ⁇ Rende identifier for the corresponding apron device is formed and stored in the corresponding switching device.
  • a reduced extent of the transmission resources arranged between the at least one switching device and the at least one apron device can be used or allocated for the transmission of information having a low priority.
  • Claim 9. This advantageous embodiment makes the probability reduces the fact that low-pore connections via apron facilities must be compulsorily drawn in the course of switching high-pore connections - for example emergency calls.
  • the block diagram shows two functionally identical switching devices LEI, 2 which are arranged in a communication network KN configured as a telephone network.
  • the switching facilities LEI, 2 shown can each be implemented, for example, by a digital, electronic voting system "EWSD" from Siemens AG.
  • An incoming time division multiplexed transmission directed to a line trunk group LTG arranged in the first switching device LEI is directed to a plurality of directions of the first switching device LEI.
  • supply ducts VKE1 ... Z comprehensive Bundel LB1 introduced via which the first switching direction LEI is connected to the übergeord ⁇ Neten communication network or telephone network KN.
  • the block diagram shows a communication terminal KE assigned to a subscriber A TLNA - for example an ISDN telephone terminal - which is connected to the first switching device LEI via the digital subscriber line unit DLU.
  • the first switching device LEI is connected to a connecting group LTG arranged in the second switching device LE2 via a further line trunk group LTG and via an outgoing bundle LBA connected to it.
  • the bundle LBA outgoing from the first switching device LEI comprises a plurality of time-multiplex-oriented transmission channels VKA1 ... Z directed in the direction of the second switching device LE2, the outgoing bundle LBA being the first route of connections established between the first and the second switching device LEI, 2 represents.
  • the first switching device LEI can be connected to the second switching device LE2 via further outgoing bundles each representing an overflow path - not shown - and via additional switching devices - also referred to as transit switching devices, not shown.
  • An emergency call point NOT for example a police or fire department, is connected to the second switching center LE2 via k connecting lines or transmission channels VLl ... k, the k connecting lines VLl ... k being connected via an apron device, for example a digital one Subscriber line unit DLU with an m of the second switching ⁇ chtung LE2 arranged connection group LTG are connected.
  • an apron device for example a digital one Subscriber line unit DLU with an m of the second switching ⁇ chtung LE2 arranged connection group LTG are connected.
  • 2 is in each case a LTG nschluß phenomenon with the respective A connected, central switching network SN to V determination of the respective switching devices LEI, mono- 2 and located outbound connections and connection requests.
  • the central switching network SN is each connected to a centrally arranged, coordinating control unit CP, to which a database DB is assigned.
  • the respective control unit CP in a functional connection with the respective assigned database DB, evaluates the signaling or dialing information transmitted as part of the connection set-up, and controls the switching or switching through of the switching device LEI, 2 incoming and outgoing transmission channels VKE1 ... Z, VKA1 ... Z depending on the particular choice or destination information determined - this evaluation and switching process is also referred to as "digit evaluation and routing".
  • each data base DB assigned to a switching device LEI, 2 and intended for digit evaluation the destinations each representing an emergency call point NOT are identified with a corresponding identifier, a connection arriving at a switching device LEI, 2 and to be switched to an emergency call point NOT indicating the type of traffic emergency call representative identifier is assigned.
  • this identifier which represents the type of traffic transmitted via the respective connection, is stored in the corresponding switching device LEI, 2, for example in a further database assigned to the central control unit CP - not shown.
  • the subscriber A TLNA requests an emergency call connection (vn) via the communication terminal KE to transmit an emergency call to the nearest emergency call point NOT.
  • all the bundles LBA i.e., the bundles LBA originating from the first switching device LEI in the direction of the second switching device LE2.
  • all transmission channels VKA1 ... Z directed towards the first route and possibly via overflowed transmission channels directed towards the second switching device LE2 are occupied.
  • a normal call connection vtel from the telephone network KN is brought to the first switching device LEI.
  • the call connection vtel is switched through or forwarded via the coupling network SN arranged in the first switching device LEI to the xth transmission channel VKAx (vtel) within the outgoing bundle ice LBA of the first route m in the direction of the second switching device LE2.
  • the call connection vtel brought up to the second switching device LE2 is forwarded via the switching network SN to a communication terminal or subscriber connected to the second switching device LE2 - not shown.
  • dialing digits identifying an emergency call point - by means of the e direction LE arranged control unit CP is determined as the example ⁇ attached to the second switching device LE2 ⁇ connected helpline NOT than nachsttrude emergency. Due to the utilization of the described communication nikationsnetzes CN as part of the call setup can no free line, or no free transmission channel VBA1 ... Z are determined within the within the Clearweges and Overflow ⁇ fene outgoing bundle LBA. This condition is also known as "alley occupied". According to the invention, in the case of a connection requested in the "alley busy" state, the type of traffic of the connection to be switched is determined by evaluating the destination information.
  • connection to be switched is not assigned the identifier "type of traffic: emergency call” or an alternative identifier representing a high priority - not described in more detail in this exemplary embodiment - the requested connection is rejected.
  • the connections that do not have the identifier "type of traffic: emergency call” are also referred to as non-emergency call connections.
  • the rejection of non-emergency call connections in the "alley busy” state is achieved, for example, by creating a "alley busy tone" representing the state "alley busy” and by triggering backwards the initiated connection establishment.
  • a transmission channel - here, for example, the xth VKAx - is determined by chance within the outgoing bundle LBA of the first route, via which a current non-emergency call connection - here the normal call connection vtel - is made.
  • the randomly determined non-emergency call connection vtel or the determined nth transmission channel VKAx is then forcibly activated by the first switching device LEI.
  • the participants can benefit from the forcibly unlocked compound VKAx are averages a entspre ⁇ sponding message or a suitable Signalsmaschineston about ⁇ .
  • the emergency call connection vnot requested by the subscriber A TLNA is then switched through via the activated transmission channel VKAx and identified with the (transient) identifier "type of traffic: emergency call".
  • the identifier "type of traffic: emergency call” is not signaled between the switching devices LEI, 2; In each switching device LEI, 2, the identifier "type of traffic: emergency call” can be derived from the emergency call connections to be switched using the transmitted destination or dialing information from the information stored in the respective database DB.
  • the emergency call connection vnot brought in via the activated transmission channel VKAx is forwarded to the connected emergency call point NOT.
  • the emergency call connection vnot which is switched through by means of the "positive-loss mechanism" is illustrated by a dashed arrow.
  • the emergency call point is connected to the second switching device LE2 via k connecting lines VLl ... k.
  • the k connecting lines VL1 .. k each have an emergency call relevance. In the event that all k connection lines VLl ...
  • G effleß a further connection variant - in the block diagram by dashed lines illustrated - is the emergency location NOT a Konzentratoreigenschaften having apron emcardi RDLÜ - for example via a remote part ⁇ participants line unit - and a terminal group LTG to the switching network SN of the second switching device LE2 connected.
  • Further communication devices or subscribers not assigned to the emergency call point NOT can also be connected to the front-end facility RDLU - not shown.
  • the connection between the second switching device LE2 and the apron device RDLU can be realized, for example, by a bundle comprising several transmission channels, the switching of the emergency call connections arriving at the second switching device LE2 to the emergency call point NOT m being carried out in a manner according to the invention.
  • a transmission channel of a non-emergency call connection currently routed to the apron device RDLU is activated and then the emergency call connection vnot to be conveyed to the apron device RDLU via the activated transmission channel connected emergency call center.
  • an identifier representing a “transient catastrophe state” can be set for the apron device RDLU connected to the second switching device LE2 and stored in the second switching device LE2 - for example in the database DB. If a non-emergency call connection is forcibly triggered as part of the world transfer of emergency calls vnot via the apron device RDLU to the emergency call point NOT, an identifier "transient catastrophe state” is set and stored by the second switching device LE2 for this apron device RDLU.
  • the identifier "transient catastrophe” is achieved such that, controlled by the second switching device LE2, only a certain maximum percentage of the transmission channels led by the second switching device LE2 in the direction of or to the apron device RDLU
  • the identifier "transient disaster condition" set for the second switching unit LE2 for a connected apron device RDLU is reset automatically by the switching device LE2, for example if the specified maximum percentage of occupied transmission channels for transmitting non-emergency calls is undershot for a predeterminable period of time.
  • the predeterminable period of time can comprise 90 seconds, for example, which corresponds to the average occupancy time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Lors d'un accès à des ressources de transmission (VKA1...z) d'un réseau de communication (KN), pour la transmission d'informations (vnot), il est procédé à un contrôle dont le but est de déterminer si la quantité de ressources de transmission nécessaire pour la transmission d'informations (vnot) est disponible à ce moment là dans le réseau de communication (KN). Si la quantité de ressources n'est pas suffisante, la priorité d'accès est déterminée, les ressources de transmission nécessaires (VKAx) étant rendues disponibles lorsque l'accès est d'une grande priorité. De façon avantageuse, les appels d'urgence peuvent être transmis indépendamment de la charge du réseau de communication (KN).
EP00963989A 1999-09-29 2000-09-20 Liberation forcee de canaux de priorite inferieure en cas de surcharge de reseau Withdrawn EP1216582A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1999146761 DE19946761A1 (de) 1999-09-29 1999-09-29 Verfahren und Kommunikationsanordnung zur Steuerung von Zugriffen auf Übertragungsressourcen eines Kommunikationsnetzes
DE19946761 1999-09-29
PCT/DE2000/003274 WO2001024543A1 (fr) 1999-09-29 2000-09-20 Liberation forcee de canaux de priorite inferieure en cas de surcharge de reseau

Publications (1)

Publication Number Publication Date
EP1216582A1 true EP1216582A1 (fr) 2002-06-26

Family

ID=7923770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00963989A Withdrawn EP1216582A1 (fr) 1999-09-29 2000-09-20 Liberation forcee de canaux de priorite inferieure en cas de surcharge de reseau

Country Status (3)

Country Link
EP (1) EP1216582A1 (fr)
DE (1) DE19946761A1 (fr)
WO (1) WO2001024543A1 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19811825B4 (de) * 1998-03-18 2004-09-16 Telefonaktiebolaget Lm Ericsson (Publ) Kommunikationssystem mit einer begrenzten Anzahl von Kommunikationskanälen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0124543A1 *

Also Published As

Publication number Publication date
DE19946761A1 (de) 2001-04-12
WO2001024543A1 (fr) 2001-04-05

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