US9271331B2 - Conditional execution of commands - Google Patents

Conditional execution of commands Download PDF

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Publication number
US9271331B2
US9271331B2 US13/127,586 US200813127586A US9271331B2 US 9271331 B2 US9271331 B2 US 9271331B2 US 200813127586 A US200813127586 A US 200813127586A US 9271331 B2 US9271331 B2 US 9271331B2
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command
termination
condition
terminations
media gateway
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US20110228790A1 (en
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Arturo Martin de Nicolas
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Telefonaktiebolaget LM Ericsson AB
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/24—Interfaces between hierarchically similar devices between backbone network devices
    • H04L12/24—
    • H04L29/06027—
    • H04L29/06183—
    • H04L29/06224—
    • H04L29/06231—
    • H04L29/06238—
    • H04L29/06244—
    • H04L29/06272—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1003—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1013—Network architectures, gateways, control or user entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1023—Media gateways
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1023—Media gateways
    • H04L65/1026—Media gateways at the edge
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1023—Media gateways
    • H04L65/103—Media gateways in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1033—Signalling gateways
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1033—Signalling gateways
    • H04L65/1036—Signalling gateways at the edge
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1033—Signalling gateways
    • H04L65/104—Signalling gateways in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/80—Responding to QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/085—Fault locating arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/125—Details of gateway equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
    • H04M3/247—Knowledge-based maintenance systems

Definitions

  • This invention relates to a method for controlling a media gateway, to a method for transmitting a command from a media gateway controller to a media gateway, and to the media gateway.
  • a typical architecture for such a system is a blade cluster structure with a plurality of blades. Transmission lines that carry payload are terminated in media gateways and the switching of these resources is controlled by the MSC server. Furthermore, a pool of terminations is provided at the media gateway, the pool of terminations being controlled by the different blades of the MSC. In case one blade of the MSC server fails, the terminations controlled by said blade have to be released in order to make them available for other calls. In this context, the terminations controlled by a failed blade need to be released in an efficient way. One possibility to release the terminations controlled by the failed blade would be to subtract the different terminations one by one by sending a subtract command to each termination. However, this represents an unacceptable amount of signalling and recovery time.
  • H.248 is for a control of elements in a multimedia gateway and is used as a control protocol between the media gateway and the media gateway controller.
  • a wildcard mechanism is known using two types of wildcards with termination IDs. These two wildcards are “ALL” and “CHOSE”.
  • ALL is used to address multiple terminations at once while the latter is used to indicate to the media gateway that it should select a termination satisfying a partially specified termination ID.
  • a termination for a media gateway is a logical entity which is the source and/or the sink of media and/or control streams. Each termination has a unique entity, the termination ID.
  • a context is an association between a number of terminations, the context describing the topology (who hears/sees whom) and the media mixing and/or switching parameters if more than two terminations are involved in the association.
  • a context is created by adding the first termination and it is released by removing/ subtracting the last termination.
  • Either the context ID or the termination ID or both may be wildcarded.
  • the wildcarding of context or terminations represents a rudimentary tool for conditional execution: the receiver of the commands scans all existing contexts and/or terminations. Only if the context ID matches the received context ID wildcard, or if the termination ID matches the received termination ID wildcard, the commands can be executed.
  • a method for controlling a media gateway in which the media gateway receives a command from the media gateway controller, the command containing a condition under which the command is to be executed.
  • the command is executed. Accordingly, the command will only be executed if the condition is met, and if the condition is not met, then the command will not be executed in the media gateway to which the command is transmitted. If the condition is not met, no action will be taken except that a reply message may be sent to the transmitter of the command, the reply message eventually containing an error message, such as “condition not met” or “condition not fulfilled”.
  • the command is a command for controlling terminations of a media gateway, the command addressing at least one termination of the media gateway.
  • the termination to which the command is addressed is identified and the command is executed for said at least one termination when the condition is met.
  • the command is executed for the identified terminations.
  • the condition contains a property parameter and a property value, wherein for determining whether the condition is met by a predetermined termination it is determined whether said property parameter is set to a given property value for said termination.
  • the property parameter and the given property value may be set during the seizure of a termination. However, it is also possible that the property parameter and the given property value will be provided to the termination at a later stage, e.g. with a modify or move command. Preferably, the property parameter and the property value will be set until the termination is released.
  • the command is addressed to a plurality of terminations.
  • the condition is then used to determine to which termination or terminations among the plurality of terminations the command is addressed.
  • the provision of the condition in the command provides the possibility to address a command to a plurality of terminations, the condition specifying to which of the terminations the command is addressed.
  • the condition may contain a first condition and a second condition combined by a compound condition rule, such as “AND”, “OR” or “NOT”.
  • a compound condition rule such as “AND”, “OR” or “NOT”.
  • the command is then executed when the first and the second condition is met.
  • the compound condition rule “AND” both conditions have to be met.
  • the compound condition rule “OR” either the first or the second condition has to be met for the execution of the command.
  • the media gateway controller may further comprise a plurality of processors, e.g. in a multi-blade architecture, and the property parameter in the command contains a group indicator identifying the processor to which the command relates to.
  • the command may be a command to subtract the terminations controlled by a predetermined processor of the media gateway controller, e.g. in case the processor fails. In this situation the terminations controlled by said predetermined processor can be identified by the group indicator contained in the condition.
  • the processor affected by a failure e.g. due to a re-start, can effectively remove all terminations which were controlled by the failed processor with a single command.
  • the command can be a H.248 command as the H.248 protocol or media gateway control protocol is used for exchanging commands between the media gateway and the media gateway controller.
  • the command containing the condition is not restricted to the subtract command.
  • the command containing the condition could be any command used in the H.248 control protocol.
  • Another example for the command can be the modify command, the command being a command to modify all terminations in the media gateway meeting a predetermined requirement.
  • the condition contains the predetermined requirement.
  • the predetermined requirement may be all terminations belonging to a predetermined IP domain.
  • Another example of a command containing a condition may be a notify command as will be explained in further detail below.
  • the invention furthermore relates to a media gateway receiving the command, the media gateway comprising a receiving unit receiving the command from the media gateway controller, the command containing the condition under which the command is to be executed. Furthermore, a verification unit is provided verifying whether the condition contained in the command is met. A controller of the media gateway provided in a media gateway may then execute the command when the condition contained in the command is met.
  • the media gateway comprises an identification unit to identify said at least one termination addressed by the command as the command is addressing at least one termination of the terminations provided in the media gateway.
  • a method transmitting the command from the media gateway controller to the media gateway. Before the command can be transmitted to the media gateway, the condition under which the command is to be executed at the media gateway is determined and the command message is generated including said condition.
  • the command is transmitted from the media gateway controller to the media gateway.
  • the receiving media gateway receiving the command processes the command as discussed above.
  • the condition may contain the group indicator identifying the processor to which the command is related to in case the media gateway controller is a multi-processor controller.
  • FIG. 1 shows a schematic view of a media gateway controller having a multi-blade architecture, the media gateway controller controlling a media gateway containing a pool of terminations,
  • FIG. 2 shows a flowchart showing the steps carried out at the media gateway using a command containing a condition
  • FIG. 3 shows a flowchart indicating the steps needed to subtract terminations controlled by a failed blade.
  • FIG. 1 a media gateway controller 10 having a multi-blade architecture with a plurality of blades 11 is shown.
  • Each blade 11 has its own processor (not shown) and each processor controls terminations 25 of the media gateway 20 .
  • the terminations 25 are provided as a pool of terminations and each of the blades can control any of the terminations 25 . In the case of a failure of one blade the terminations controlled by said blade have to be released in order to allow other blades to use these terminations for signalling.
  • the media gateway controller 10 is connected to one media gateway. However, it should be understood that the media gateway controller 10 may be connected to several media gateways, but for ease of reading and without limiting the invention in the following description only a single media gateway 20 will be referenced.
  • the media gateway controller sets up and releases end-to-end connections, handles mobility and handover requirements during a call and takes care of charging and accounting.
  • One termination 25 of the media gateway 20 is controlled by a single blade 11 within the media gateway controller.
  • messages are transmitted from the different blades to the termination to which the message is related to.
  • the message may be a message to add a termination, to subtract a termination, or to modify a termination.
  • the media gateway 20 comprises a receiving unit 21 receiving the message containing the command from the media gateway controller.
  • the message contains a condition and the command will only be executed if the condition is met.
  • the command can be enhanced by a condition descriptor to be included in the command.
  • the condition contains a property parameter, such as a blade number, the property parameter indicating a property value, such as the number of the blade from which the command is transmitted or to which the command is related to.
  • the media gateway furthermore comprises an identification unit 22 identifying said at least one termination addressed by the command.
  • the commands are often used with the wildcarding mechanism allowing to address a plurality of terminations or contexts at a time.
  • the condition can now specify in detail to which terminations the command is addressed.
  • a verification unit 23 detects the condition within the command and verifies whether the condition contained in the command is met. When the command is addressed to a plurality of terminations, the condition is used to determine to which of the terminations the command is addressed.
  • the identification of the terminations addressed can be achieved with the property parameter and the property value.
  • the property parameter with the property value can be set during the seizure. However, it is also possible that the property value is set at a later stage with a modify or move command.
  • the property parameter may be used to identify the blade which is controlling the seized termination.
  • the property value indicates the blade number.
  • a controller 24 provided in the media gateway executes the command when the condition is met. In the above-mentioned example of the subtract command the controller 24 will release all terminations controlled by the blade, the number of which is contained in the condition.
  • the property parameter will be set by the media gateway controller and remains until the termination is released.
  • step 200 a termination may be added to a context for a call where two or more terminations are connected together. During the seizure of the termination the property parameter with the property value is set. If the media gateway control protocol H.248 is used for exchanging messages between the media gateway and the media gateway controller, a new H.248 proprietary package may be needed with a property to indicate the blade. This new proprietary package allows to provide additional functions, such as the indication of the blade.
  • step 202 a command from the media gateway controller is received by the media gateway and in step 203 the terminations addressed by the command are identified.
  • step 204 it is asked whether the condition contained in the command is met for the identified terminations. If the condition is met for none of the terminations, the command is not executed and an error message may be transmitted back to the transmitter of the message. If, however, the condition is met in step 204 , the command is executed in step 205 .
  • step 301 the termination is seized with the blade indicator indicating the blade number that is controlling in the seized termination. Now it may happen that a blade failure occurs, by way of example due to a re-start of the blade. If in step 302 a blade failure is detected, the terminations controlled by the failed blade have to be released in order to provide the possibility that these terminations are used for other calls controlled by other blades.
  • step 303 a subtract command is transmitted to the media gateway containing the blade ID of the failed blade as condition.
  • step 304 the terminations to which the command is addressed is identified.
  • the command basically addresses all terminations of the media gateway as the wildcard mechanism “ALL” is used.
  • This step corresponds to step 203 mentioned in FIG. 2 .
  • the blade ID contained in the condition it is possible to more specifically identify the terminations which should be released after the blade failure. As the property of the blade number is already set during the seizure of the termination or at a later stage, it is possible to identify the terminations that were controlled by the failed blade.
  • step 305 the blade indicator contained in the condition is identified (in the above example it is blade 1 ).
  • the terminations affected by the blade failure are determined that were controlled by said blade by checking the blade indicator set for each termination. The terminations having the blade indicator contained in the condition are then subtracted in step 307 .
  • the condition can be used in connection with other commands.
  • One example is the modify command. After a re-start of the media gateway controller the removal of all ATM/IP terminations is ordered, but before that a signal is sent to release the bearer (BNC) release. However, the signal is only applicable to ATM bearers, it is not necessary for IP bearers.
  • the termination ID does not indicate whether it is an IP or an ATM termination.
  • This embodiment relates to the same situation as in the previous case, but the release bearer is only needed for ATM bearers and the core network side, whereas it is not needed for the mobile access side.
  • the 3GPP TS 29.232 threegup/interface indicates whether it is a network or an access interface.
  • an event is sent on all terminations belonging to a specific IP domain as identified by the ITU-T H.248.41 ipcd/realm property.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)
  • Computer And Data Communications (AREA)
  • Mobile Radio Communication Systems (AREA)
US13/127,586 2008-11-05 2008-11-05 Conditional execution of commands Expired - Fee Related US9271331B2 (en)

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PCT/EP2008/064995 WO2010051837A1 (fr) 2008-11-05 2008-11-05 Exécution conditionnelle de commandes

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US9271331B2 true US9271331B2 (en) 2016-02-23

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US13/127,872 Active 2030-08-31 US8879566B2 (en) 2008-11-05 2009-05-04 Method for grouping terminations

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EP (1) EP2351458A1 (fr)
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US20110228790A1 (en) 2011-09-22
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JP5823866B2 (ja) 2015-11-25
EP2351458A1 (fr) 2011-08-03
JP5591814B2 (ja) 2014-09-17
US8879566B2 (en) 2014-11-04
US20110268128A1 (en) 2011-11-03
JP2012507893A (ja) 2012-03-29

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