[go: up one dir, main page]

WO2002009449A1 - Unite de commande de noyau de commutation pour equipement de sous-repartition numerique, et modes de fonctionnement du noyau de commutation - Google Patents

Unite de commande de noyau de commutation pour equipement de sous-repartition numerique, et modes de fonctionnement du noyau de commutation Download PDF

Info

Publication number
WO2002009449A1
WO2002009449A1 PCT/IL2000/000445 IL0000445W WO0209449A1 WO 2002009449 A1 WO2002009449 A1 WO 2002009449A1 IL 0000445 W IL0000445 W IL 0000445W WO 0209449 A1 WO0209449 A1 WO 0209449A1
Authority
WO
WIPO (PCT)
Prior art keywords
controller according
incoming call
allocation scheme
switching core
communication path
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
Application number
PCT/IL2000/000445
Other languages
English (en)
Inventor
Zvi Rubinstein
Simon Galler
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.)
BERHOLTZ YORAM
ECI Telecom Ltd
Original Assignee
BERHOLTZ YORAM
ECI Telecom Ltd
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 BERHOLTZ YORAM, ECI Telecom Ltd filed Critical BERHOLTZ YORAM
Priority to PCT/IL2000/000445 priority Critical patent/WO2002009449A1/fr
Priority to AU2000261790A priority patent/AU2000261790A1/en
Publication of WO2002009449A1 publication Critical patent/WO2002009449A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H04Q3/0062—Provisions for network management

Definitions

  • the invention relates to switching core controllers for controlling switching cores, and modes of operation therefor.
  • DCSs Digital Cross-connect Systems
  • T::DAXTM DCS Digital Cross-connect Systems
  • DCSs are typically employed for slow switching purposes, for example, bandwidth management purposes, grooming, conversion between transmission standards, and the like.
  • Dial up internet connection often requires several attempts before a successful connection is made, particularly during the internet call busy period between about 9 pm to midnight.
  • a subscriber may re-dial the same access number or try another dial up internet access telephone number of his ISP which is awkward and time consuming.
  • PMO Present Mode of Operation
  • One Present Mode of Operation (PMO) for "automatic" congestion control as opposed to the "manual" approach congestion involves rerouting of an internet call at one tandem switch and destined for an RAS pool connected to one of its egress switches to another RAS pool of the same ISP connected to an egress switch connected to another tandem switch (see Figure 2).
  • congestion control requires Advanced Intelligent Network (AIN) and Signaling Control Point (SCP) capabilities which may not be supported by some PSTN Class 4/5 switches.
  • AIN Advanced Intelligent Network
  • SCP Signaling Control Point
  • congestion control typically only occurs when the originally destined RAS pool has reached saturation level i.e. no more transmission ports are available.
  • automated congestion control often causes a snowballing effect in the signaling network generated by AIN queries.
  • a switching core controller for controlling at least one Digital Cross-connect System (DCS) each having a switching core, the controller comprising:
  • At least one resource manager each interfacing with a router of said at least one router for providing instructions for communication path establishment and tear down in the switching core of an DCS of said at least one DCS in response to said signaling information.
  • the Switching Core Controller (SCC) of the first aspect of the present invention enables an DCS to be employed for certain service applications including inter alia offloading internet calls from the PSTN, call tapping, and the like, in place of higher switching rate switches.
  • the SCC can be operated in accordance with several modes of operation, for example, a pre-provisioning mode of operation in accordance with a second aspect of the present invention, a load balancing mode of operation in accordance with a third aspect of the present invention, amongst other.
  • the operation of the SCC can be managed in accordance with different management allocation schemes to cater for different loading, for example, the voice call business busy hour at about midday, the voice call residential busy hour at about 5pm, the internet call residential busy hour between about 9pm and midnight, weekends as opposed to weekdays, and the like. Management allocation schemes can also reflect different Service Level Agreements (SLAs) between a subscriber and a carrier, desired Grades of Service (GoSs), and the like.
  • SLAs Service Level Agreements
  • the SCC can be implemented for interfacing the DCS with any one of a number of signaling networks including inter alia Q.2931, MGCP/H.248, Q.SIG, and the like.
  • a method for operating a switching core with at least three interfaces including at least two I/O interfaces with each interface having at least one transmission port, and a switching fabric capable of connecting a pair of transmission ports of two different interfaces of the at least three interfaces for provisioning an end-to-end communication path for passing a particular class of calls of at least two classes of calls through the switching core, the method comprising the steps of:
  • the method in accordance with the second aspect of the present invention is based on the notion that the switching activity of a switching core can be reduced by pre-provisioning communication paths in anticipation of incoming calls which would otherwise effect their establishment, thereby enhancing its switching capability as perceived by a calling party in terms of
  • pairs of transmission ports of are preferably continuously being matched as they become available after the tear down of new communication paths such that the number of available communication paths in the absence of any calls passing through the switching core equals the number of pre-provisioned communication paths under a prevailing management allocation scheme.
  • a hitherto employed Tandem Replacement Switch in a post-ingress switch internet call off-loading architecture can be replaced by a less expensive Digital Cross-connect System (DCS), such as the above-mentioned T::DAXTM DCS, without severely impairing the GoS as perceived by a calling party, if at all.
  • DCS Digital Cross-connect System
  • a switch can be operated in accordance with the proposed FMO in accordance with the second aspect of the present invention, thereby rendering a greater utilization of its inherent high switching rate capability.
  • a method for routing a call to a transmission port of a mediation device of a pool of at least one mediation device of a logical entity of at least one pool where each of the at least one mediation device of a pool is connected to the same switching core and a logical entity includes at least two mediation devices comprising the steps of: (a) upon arrival of an incoming call, determining the transmission ports available for handling the incoming call at each of the mediation devices of the logical entity to which the incoming call is directed; and
  • the method in accordance with the third aspect of the present invention takes advantage of the fact that the occupancy level of the transmission ports of an interface of a switching core having a signaling network interface is known by the signaling gateway, thereby enabling load balancing between mediation devices logically grouped into logical entities for improving their utilization.
  • the term "load balancing allocation scheme" should be interpreted broadly and not necessarily that the loads are equally balanced between two or more mediation devices.
  • a load balancing allocation scheme can restrict the routing of an incoming call to a sub-set of the available transmission ports of a logical entity.
  • Other allocation schemes can be dependent on the availability of transmission ports of a logical entity, the time of day, SLAs between a subscriber and an ASP, and the like.
  • the division of mediation devices into logical entities can take into consideration several factors including inter alia the geographical spread of the mediation devices, the geographical spread of the switching cores, the trunks connecting the mediation devices and/or the switching cores, network planning considerations, and the like.
  • one or more network resource management layers are effectively created to manage mediation devices in a fully transparent manner from the point of view of calling parties and/or the carriers including inter alia ILECs, CLECs, ISPs, and the like.
  • a mediation devices can be a RAS pool, a voice switch, an ATM switch, a multi-service switch, and the like.
  • a particular implementation of the third aspect of the present invention is for load balancing between an ISP's RAS pools located in business areas and residential areas since an RAS pool is more heavily employed either during office hours or after office hours depending on whether its dial-up connection telephone number belongs to an egress switch located in a business area or a residential area.
  • a natural development of such load balancing is that an ISP can allocate a single internet dial up connection telephone number to all its subscriber's irrespective of their geographical location.
  • Fig. 1 is a schematic representation showing a conventional post ingress switch internet call offloading architecture
  • Fig. 2 is a schematic representation showing a conventional internet call congestion control architecture
  • Fig. 3 is a schematic representation showing a signaling gateway for interfacing a Digital Cross-connect System (DCS) with a signaling network;
  • DCS Digital Cross-connect System
  • Fig. 4 is a schematic representation showing an DCS operative in accordance with the second aspect of the present invention.
  • Fig. 5 is a flow diagram showing the operation of the DCS of Figure 4.
  • Fig. 6 is a schematic representation showing an DCS operative in accordance with the third aspect of the present invention.
  • Fig. 7 is a flow diagram showing the operation of Figure 6.
  • FIG. 3 shows a signaling gateway 1 interfacing with the Signaling System 7 (SS7) network 2 (constituting a signaling network) for controlling five Digital Cross-connect Systems (DCSs) 3A, 3B, 3C, 3D, and 3E, for example, the T::DAXTM DCS commercially available from the proprietor of the present application.
  • the signaling gateway 1 can be functionally considered as having four functional entities as follows Signaling Interface Unit (SIU) 4, a call controller 6, a Switching Core Controller (SCC) 7 including at least one router 8 each interfacing with one or more Resource Managers (RMs) 9, and a Switching Core Interface Unit (SCIU) 11.
  • SIU Signaling Interface Unit
  • SCC Switching Core Controller
  • RMs Resource Managers
  • SCIU Switching Core Interface Unit
  • Each SCC 7 includes a library of modes of operation 12 for operating an DCS 3, for example, pre-provisioning of communication paths in accordance with a management allocation scheme, a load balancing between mediation devices in accordance with a load balancing allocation scheme, amongst others.
  • An SCC 7 also includes a library of management/load balancing allocation schemes 13, for example, one exemplary management allocation scheme suitable for one or both voice call busy hours stipulates the pre-provisioning of the maximum possible number of voice call communication paths, another exemplary management allocation scheme suitable for internet call residential busy hour stipulates the pre-provisioning of the maximum possible number of internet call communication paths IC1, IC2, and IC3, amongst others.
  • the SIU 4 has the same functionality as the TSU commercially available from Hewlett Packard, namely, interfacing with the SS7 network 2.
  • the call controllers 6A and 6B have similar functionality as the Generic Call Control (GCC) module of the ICC software module commercially available from Trillium, namely, providing instructions for communication path establishment and tear down to a pair of SCCs 7A and 7B.
  • GCC Generic Call Control
  • Each SCC's router 8 determines call communication paths through its associated DCSs in response to the signaling information from the SS7 network 2.
  • Each SCC's resource manager 9 provides instructions for communication path establishment and tear down in the switching core of its associated DCSs in response to the signaling information from the SS7 network 2.
  • Each SCIU 11 translates the instructions for communication path establishment and tear down for transfer to its respective DCS 3.
  • FIG. 4 shows the deployment of the signaling gateway 1 and an DCS 3 for offloading internet calls from the PSTN, the DCS 3 being interdisposed between a Class 5 PSTN ingress switch 14, a Class 4 PSTN tandem switch 16, and an RAS 17 connected to a data network 18.
  • the DSC 3 has an I/O interface 19 connected to the PSTN ingress switch 14, an I/O interface 21 connected to the PSTN tandem switch 16, and an I/O interface 22 connected to the RAS 17, and a switching fabric 23.
  • the I/O interface 19 has five line side transmission ports numbered ⁇ l, ⁇ 2, ⁇ 3, ⁇ 4, and ⁇ 5, the I/O interface 21 has four trunk side transmission ports numbered ⁇ lO, ⁇ l 1, ⁇ l2, and ⁇ l3, and the I/O interface 21 has three transmission ports numbered ⁇ 20, ⁇ 21, and ⁇ 22.
  • the SCC 7 controls the provisioning of communication paths through the switching fabric 23 between pairs of transmission ports of the interfaces 19, 21 and 22 for passing voice calls (constituting one class of call) from the PSTN ingress switch 14 to the PSTN tandem switch 16 and internet calls (constituting another class of call) from the PSTN ingress switch 14 to the RAS 17 in accordance with signaling messages passing through the SS7 network 2.
  • the maximum possible number of voice call communication paths between the interfaces 19 and 21 is four, four exemplary communication paths VC1, VC2, VC3, and VC4 being shown in dashed lines.
  • the maximum possible number of internet call communication paths between the interfaces 19 and 22 is three, three exemplary communication paths ICl, IC2, and IC3 being shown in dotted lines.
  • the SCC 7 sets up the four communication paths VC1, VC2, VC3, and VC4 in anticipation of incoming voice calls arriving at either the line side transmission ports ⁇ l, ⁇ 2, ⁇ 3, and ⁇ 4 from the PSTN ingress switch 14, or the trunk side transmission ports ⁇ lO, ⁇ l l, ⁇ l2, and ⁇ l3 from the PSTN tandem switch 16 which, on their actual arrival, would pass through the switching fabric 23 without any additional switching activity.
  • an internet call arriving at any one of the line side transmission ports ⁇ l, ⁇ 2, ⁇ 3, and ⁇ 4 or alternatively at any one of the trunk side transmission ports ⁇ lO, ⁇ l l, ⁇ l2, and ⁇ l3, causes the SCC 7 to tear down the voice call communication path VCx and to establish an internet call communication path IC in its place employing the transmission port ⁇ x upon which the internet call arrived and one of the transmission ports ⁇ 20, ⁇ 21, and ⁇ 22.
  • the SCC 7 attempts to pre-provision another voice call communication path such that the number of voice call communication paths when there are no calls passing through the DCS 3 equals the number of voice call communication paths stipulated by the prevailing management allocation scheme.
  • Figure 6 shows a telecommunication network 24 including a pair of signaling gateways 1A and IB interfacing with the SS7 network and respectively having SCCs 7A and 7B, and operative to effective load balancing.
  • the signaling gateway 1A controls two DCSs 3A and 3B whilst the signaling gateway IB controls a single DCS 3C.
  • the DCS 3A is connected to a pool 26 of a single RAS 27 and a pool 28 of a pair of RASs 29 and 31.
  • the DCS 3B is connected to a pool 32 of a pair of RASs 33 and 34.
  • the DCS 3C is connected to a pool 36 of a single RAS 37 and a pool 38 of a pair of RASs 39 and 41.
  • the RASs are connected to a data network 42 such as an IP network, and are logically divided into two logical entities 43A and 43B as follows: the logical entity 43 A includes three pools 26, 32 and 36 whilst the logical entity 43B includes two pools 28 and 29.
  • Each signaling gateway 1 maintains a logical entity database 44 including a list of the logical entities in the telecommunication network 24, and the signaling gateway 1 responsible for the load balancing in each logical entity 43.
  • a signaling gateway's logical entity database 44 also includes for each logical entity under its control, a list of the RASs in each pool of a particular logical entity, a list of the transmission ports of each RAS, and status of each of the transmission ports 46.
  • the signaling gateway responsible for the load balancing of the logical entity to which the incoming call is directed is determined. Thereafter, the signaling gateway's SCC 7 determines the transmission ports available for handling the incoming call at each of the mediation devices of the logical entity, and routes the incoming call to one of the available transmission ports in accordance with a prevailing load balancing allocation scheme.

Landscapes

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

Abstract

L'invention concerne une unité de commande de noyau de commutation permettant de commander au moins un équipement de sous-répartition numérique (DCS). L'invention concerne également le fonctionnement d'un noyau de commutation permettant la fourniture anticipée de chemins de communication afin d'anticiper un appel entrant. L'invention concerne enfin un procédé permettant d'acheminer un appel afin d'équilibrer une charge entre des dispositifs de médiation d'une entité logique d'au moins deux dispositifs de médiation.
PCT/IL2000/000445 2000-07-26 2000-07-26 Unite de commande de noyau de commutation pour equipement de sous-repartition numerique, et modes de fonctionnement du noyau de commutation Ceased WO2002009449A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/IL2000/000445 WO2002009449A1 (fr) 2000-07-26 2000-07-26 Unite de commande de noyau de commutation pour equipement de sous-repartition numerique, et modes de fonctionnement du noyau de commutation
AU2000261790A AU2000261790A1 (en) 2000-07-26 2000-07-26 Switching core controller for digital cross-connect system, and modes of operating a switching core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IL2000/000445 WO2002009449A1 (fr) 2000-07-26 2000-07-26 Unite de commande de noyau de commutation pour equipement de sous-repartition numerique, et modes de fonctionnement du noyau de commutation

Publications (1)

Publication Number Publication Date
WO2002009449A1 true WO2002009449A1 (fr) 2002-01-31

Family

ID=11042989

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2000/000445 Ceased WO2002009449A1 (fr) 2000-07-26 2000-07-26 Unite de commande de noyau de commutation pour equipement de sous-repartition numerique, et modes de fonctionnement du noyau de commutation

Country Status (2)

Country Link
AU (1) AU2000261790A1 (fr)
WO (1) WO2002009449A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102703787A (zh) * 2012-05-18 2012-10-03 国家钽铌特种金属材料工程技术研究中心 一种添加有微量硼的铌钛铝合金及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995035633A2 (fr) * 1994-06-06 1995-12-28 Bellsouth Corporation Passerelle d'echange de paquets de donnees pour reseaux evolues intelligents
WO1998037730A1 (fr) * 1997-02-20 1998-08-27 Telefonaktiebolaget Lm Ericsson (Publ) Reservation de ressources dans des reseaux mta
US5862334A (en) * 1994-07-08 1999-01-19 Northern Telecom Limited Mediated access to an intelligent network

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995035633A2 (fr) * 1994-06-06 1995-12-28 Bellsouth Corporation Passerelle d'echange de paquets de donnees pour reseaux evolues intelligents
US5862334A (en) * 1994-07-08 1999-01-19 Northern Telecom Limited Mediated access to an intelligent network
WO1998037730A1 (fr) * 1997-02-20 1998-08-27 Telefonaktiebolaget Lm Ericsson (Publ) Reservation de ressources dans des reseaux mta

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102703787A (zh) * 2012-05-18 2012-10-03 国家钽铌特种金属材料工程技术研究中心 一种添加有微量硼的铌钛铝合金及其制备方法

Also Published As

Publication number Publication date
AU2000261790A1 (en) 2002-02-05

Similar Documents

Publication Publication Date Title
US5956334A (en) Method for interfacing a telephony and an ATM network to establish voice communication
US6081591A (en) Signaling network gateway device and method for use in a signaling network
CA2255971C (fr) Systeme et methode de contournement de donnees provenant d'installations de sortie
US6278707B1 (en) Platform for coupling a circuit-switched network to a data network
EP1196741B1 (fr) Methode et systeme pour la prestation de services telephoniques via dsl
US20030078962A1 (en) Integrated communications system
US7072331B2 (en) Configurable digital subscriber loop access and end-to-end data and analog voice connection system
EP1111859B1 (fr) Qualité de service à la demande pour des communications vocales sur un reseau de données par paquets
US5809129A (en) Resource separation in a call and connection separated network
US8559614B2 (en) Systems and methods of providing multi-homed tandem access
US6496508B1 (en) Communication system architecture and method of establishing a communication connection therein
HU221400B1 (en) Telecommunications system and method for operating thereof, as well as, synchronous data transmission multipexer
WO2002033863A1 (fr) Gestionnaire de trafic, service de signalisation passerelle et de fourniture conçu pour tous les reseaux a commutation de paquets a normes globales a travers tout le systeme pour applications a large bande incluant tous les services existants
JP2000196664A (ja) インタ―ネット網上を伝送される遅延に敏感なトラヒックに対してサ―ビスの品質を提供するための方法
CA2132363A1 (fr) Gestion de reseaux a technologies differentes utilisant l'acheminement hierarchique et la gestion des services multireseau
JPH10271136A (ja) 非同期転送モード統合アクセスサービスのための方法およびシステム
US20110026515A1 (en) Communication network with line-and packet-switching control
KR100395580B1 (ko) 서비스등급자동루팅
EP0798942A2 (fr) Acheminement et allocation de bande passant
US6895088B1 (en) System and method for controlling a call processing system
US6757373B1 (en) Switching core controller for digital cross-connect system, and modes of operating a switching core
US7254228B2 (en) Method and system for effective utilizing the switching capacity of local exchanges
US20070280268A1 (en) ATM Telecommunications Systems and Method for Routingg Narrow Band Traffic
WO2002009449A1 (fr) Unite de commande de noyau de commutation pour equipement de sous-repartition numerique, et modes de fonctionnement du noyau de commutation
US7688836B1 (en) Method and system for establishing a cross-carrier, multilayer communications path

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP