WO2010091634A1 - Procédé, appareil et système d'établissement d'un commutateur local - Google Patents

Procédé, appareil et système d'établissement d'un commutateur local Download PDF

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Publication number
WO2010091634A1
WO2010091634A1 PCT/CN2010/070597 CN2010070597W WO2010091634A1 WO 2010091634 A1 WO2010091634 A1 WO 2010091634A1 CN 2010070597 W CN2010070597 W CN 2010070597W WO 2010091634 A1 WO2010091634 A1 WO 2010091634A1
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WO
WIPO (PCT)
Prior art keywords
network device
local exchange
access network
base station
station subsystem
Prior art date
Application number
PCT/CN2010/070597
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English (en)
Chinese (zh)
Inventor
朱星
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2010091634A1 publication Critical patent/WO2010091634A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/181—Transcoding devices; Rate adaptation devices

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, device, and system for establishing a local exchange. Background technique
  • the transmission network is an important part of the wireless communication network.
  • operators in many countries and regions have affected the deployment, operation and service development of the wireless network because of the bottleneck problem of the transmission resources connecting the wireless access network and the core network.
  • regions such as Africa wireless networks are growing much faster than wired networks.
  • regions represented by Europe due to local laws and regulations, the construction of terrestrial cable transmission networks cannot be built according to the needs of operators.
  • countries with rich terrestrial transmission resources, such as China face the problem of high cost and low return on investment in the construction of transmission networks in remote areas and islands.
  • the operator usually uses microwave, satellite or leased terrestrial transmission lines.
  • the local exchange can be divided into local exchanges in the Base Transceiver Station (BTS) and local exchanges in the Base Station Controller (BSC).
  • BTS Base Transceiver Station
  • BSC Base Station Controller
  • the two sides of the session are located in the same BTS, or in the same BTS cluster (in the case of BTS cascading), the loopback of the voice link occurs in the corresponding BTS.
  • both parties are in the same BSC, but in different BTS (BTS clusters), the voice chain The loopback occurs in the corresponding BSC.
  • BTS BTS clusters
  • the BSC decides whether to establish a local exchange by judging whether the two calls constituting the session use the same codec and whether they belong to the same BTS (cluster) or BSC.
  • Embodiments of the present invention provide a method, device, and system for establishing a local exchange to save an A interface transmission resource.
  • an embodiment of the present invention provides a method for establishing a local exchange, including:
  • the base station subsystem is informed of the resources allocated for the two calls constituting the session by sending an assignment request message to the base station subsystem and asking whether the base station subsystem can perform local exchange;
  • the base station subsystem is instructed to perform local switching.
  • an embodiment of the present invention further provides a core network device, including: a resource allocation unit, configured to notify the access network device of resources allocated for two calls constituting a session and query the access network device by sending an assignment request message to the access network device if the condition for establishing the local exchange is satisfied Whether it is possible to perform local exchange;
  • An information acquiring unit configured to acquire, by receiving an assignment completion message returned by the access network device, information about whether the access network device can perform local exchange
  • a local switching processing unit configured to: if the access network device is capable of local switching, instructing the access network device to perform local switching; if the access network device cannot perform local switching, continuing the assignment process.
  • an embodiment of the present invention further provides an access network device, including:
  • the embodiment of the invention further provides a communication system, including:
  • a core network device configured to notify the access network device of resources allocated for two calls constituting a session and query the access network device by sending an assignment request message to the access network device if a condition for establishing a local exchange is satisfied Whether it is possible to perform local exchange, and obtain information about whether the access network device can perform local exchange by receiving an assignment completion message returned by the access network device, and if the access network device is capable of local exchange, indicating The access network device performs local exchange; if the access network device cannot perform local exchange, the assignment process continues;
  • the access network device is configured to receive an assignment request message sent by the core network device, according to the
  • the assignment request information is allocated to the call constituting the session, and the core network device is notified by the result of whether the local exchange can be performed by sending the assignment completion message, and the local exchange command sent by the core network device is received, according to the local exchange.
  • the command performs a local swap operation.
  • the core network device determines whether the local exchange can be established, and the access network device is consulted whether it has the capability of establishing a local exchange, thereby establishing a local exchange process, which can effectively save A. Interface transmission resources.
  • FIG. 2 is a schematic flowchart 1 of a method for establishing a local exchange according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart 2 of a method for establishing a local exchange according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram 1 of a core network device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram 2 of a core network device according to an embodiment of the present invention.
  • An embodiment of the present invention provides a method for determining, by a core network, for example, an MSC, whether a local exchange can be established in an assignment process, and whether the base station subsystem is queried by an access network device, such as a base station subsystem (BSS). It has the technical solution of establishing local exchange to establish the capability of local exchange, thereby effectively saving the transmission resources of the A interface.
  • a core network for example, an MSC
  • BSS base station subsystem
  • the embodiment of the present invention provides a method for establishing a local exchange, which specifically includes: Step 201: If the condition for establishing a local exchange is met, the base station subsystem is notified by sending an assignment request message to a base station subsystem. The resources allocated for the two calls constituting the session and the query whether the base station subsystem is capable of local exchange, the two calls constituting the session, one is called, one Is the caller;
  • Step 202 Obtain information about whether the base station subsystem can perform local exchange by receiving an assignment complete message returned by the base station subsystem.
  • Step 203 Instruct the base station subsystem to perform local exchange according to the acquired information, if the base station subsystem is capable of local switching.
  • the method for establishing a local exchange can be determined by the core network, for example, the MSC, whether the local exchange can be established, and the base station subsystem is queried whether the base station subsystem has the capability of establishing a local exchange, thereby better supporting.
  • Supplementary services such as call waiting, call hold, multi-party call and lawful interception, etc.; and can release A-interface related resources after establishing local exchange, effectively saving A interface transmission resources.
  • the current assignment process is continued.
  • the method may further include: receiving layer 3 information reported by the base station subsystem during the call setup process, and determining, according to the layer 3 information Whether the conditions for establishing a local exchange are met.
  • the MSC can determine which calls can establish a local exchange. For example, the MSC can determine whether to allow two calls of the session by recording the cell identity (Cell-ID) of the cell in which the two calls constituting the session are located, combining the codec used by the two calls and the current request for supplementary services. Establish a local exchange. For example, the MSC can determine whether a two call can establish a local exchange according to the following aspects:
  • the attributes of the service cannot conflict with the local exchange, for example, for call waiting,
  • the attributes of the supplementary service such as call hold and multi-party call conflict with the local exchange, and local exchange cannot be performed.
  • it can be uniquely identified by some means of identification.
  • the cell of the call identifier (Call-ID) can be used for identification.
  • Call-ID other methods may be used, and the manner in which this document is filed does not limit it.
  • the base station subsystem may be instructed to perform local exchange after receiving the connection message sent by the called party constituting the session.
  • the local exchange procedure After setting the local exchange procedure after the MSC receives the connected connection message, it can avoid the voice quality loss caused by the loss of the voice frame caused by the introduction of the local exchange.
  • the resource allocated by the base station subsystem to the associated call in the step 201 may include: a resource allocated for the local exchange, or a resource allocated for the local exchange and a core network user plane resource allocated for the call.
  • the assignment request message, the assignment completion message, or the local exchange command message indicating that the base station subsystem performs local exchange may be transmitted on the signaling connection control protocol SCCP connection of the calling or called party that constitutes the session.
  • the MSC sends and receives an assignment message, such as an assignment request message, on the SCCP connection of a call, so that the assignment message is sent on both the primary and the called, thereby reducing the A-interface signaling message and shortening the duration of the call setup.
  • the embodiment of the present invention further provides a method for establishing a local exchange.
  • the mobile terminal 1 (MS1) is called as the calling party, and the mobile terminal 2 (MS2) is called.
  • MS1 mobile terminal 1
  • MS2 mobile terminal 2
  • the base station subsystem BSS sends a full layer three message (COMPLETE LAYER 3 MESSAGE) related to the calling party to the MSC, where the layer three message includes layer three information related to the calling party.
  • a full layer three message (COMPLETE LAYER 3 MESSAGE) related to the calling party to the MSC, where the layer three message includes layer three information related to the calling party.
  • the MS1 sends a call setup message (SETUP) to the MSC through the BSS.
  • SETUP call setup message
  • the BSS sends a complete layer three message related to the called party to the MSC, where the layer three message includes There are layer three information related to the called party;
  • the MSC can determine whether the two calls constituting the session meet the conditions for establishing the local exchange according to the layer 3 information related to the primary and the called party reported by the BSS.
  • the specific determination process is similar to the determination process described in the foregoing embodiment, and details are not described herein again.
  • S304 The MSC receives a call confirmation message (CALL CONFIRMED) after the MS2 completes the test of the call capability of all compatible devices, and notifies the MSC that all the messages required for establishing the call connection have been received.
  • CALL CONFIRMED a call confirmation message
  • the local exchange assignment request is sent by the calling or called signaling connection control protocol (SCCP).
  • SCCP signaling connection control protocol
  • An ASSIGNMENT REQUEST message by which the BSS is informed of the resources allocated for the two calls, and whether the BSS is capable of performing a local exchange.
  • the allocated resource may be a resource allocated for performing local exchange, or may be a resource allocated for performing local exchange and a core network user plane resource allocated for the call, in case the local exchange cannot be performed,
  • the call can be imported into the core network.
  • the supplementary service such as call waiting, call hold, multi-party call, and lawful interception, can be better supported; It can effectively save the A interface transmission resources.
  • the MSC avoids sending an assignment message on both the primary and the called, thereby reducing the A-interface signaling message and shortening the duration of the call setup.
  • the BSS After receiving the local exchange assignment request message, the BSS allocates the required resources to the call according to the indication of the local exchange assignment request message, and sends the local exchange assignment complete (LS).
  • the ASSIGNMENT COMPLETE message informs the MSC that its resource allocation is complete, and sends the LS ASSIGNMENT COMPLETE message to the MSC whether it can perform the local exchange. Whether the BSS can perform the result information of the local exchange It can be carried in the local exchange judgment (LOCAL SWITCH JUDGMENT) cell of the local exchange assignment completion message. Of course, it can also be carried in other cells, which is not limited in the embodiment of the present invention.
  • the local exchange assignment complete message may also be sent only on the SCCP connection of the calling or called party, and may be saved by half of the message sent on the SCCP connection of the calling party, thereby reducing the A interface signaling. Message, shorten the length of call setup.
  • MS2 sends an alert message (ALERTING) to the MSC.
  • the MSC sends an alert message (ALERTING) to the MSI.
  • ALERTING alert message
  • the MSC receives the connection message (CONNECT) sent by the MS2, and starts the call charging.
  • CONNECT connection message
  • the local exchange command message may also be sent only on the SCCP connection of the calling or called party, and may be saved by half of the message sent on the SCCP connection of the calling party, thereby reducing the A interface signaling message. , shorten the length of call setup.
  • the BSS performs a local exchange related operation according to the local exchange command. If the execution succeeds, the local exchange completion (LOCAL SWITCH COMPLETE) message is sent to the MSC to notify the local exchange establishment. If the local exchange cannot be established, the local exchange failure can be sent to the MSC.
  • the local exchange completion (LOCAL SWITCH COMPLETE) message is sent to the MSC to notify the local exchange establishment. If the local exchange cannot be established, the local exchange failure can be sent to the MSC.
  • the (LOCAL SWITCH FAILURE) message informs the MSC that the local exchange establishment fails, and the MSC reserves the core network user plane resources allocated for the two calls to perform the subsequent call setup procedure.
  • the local exchange completion message or the local exchange failure message may also be sent only on the SCCP connection of the calling or called party, and may be saved by half of the message sent on the SCCP connection of the calling party, thereby reducing the amount of messages.
  • A-interface signaling message shortening the duration of call setup. S312.
  • the MSC After receiving the local exchange complete message, the MSC sends a connection (CONNECT) message to the MS1, indicating that the connection has been established through the network.
  • the local exchange establishment process is performed by setting the CONNECT message of the MS2 to the MSC before the MSC sends the CONNECT message to the MS1, so as to avoid the loss of the voice frame caused by the introduction of the local exchange and affect the voice quality.
  • this is only a preferred embodiment of the present invention, and the embodiment of the present invention is not intended to limit the specific location of the above-mentioned local exchange procedure.
  • the MS1 sends a connection confirmation (CONNECT ACK) message to the MSC.
  • CONNECT ACK connection confirmation
  • the MSC clears the core network user plane resource allocated for the two calls, and sends a connection confirmation (CONNECT ACK) message to the MS2.
  • CONNECT ACK connection confirmation
  • an embodiment of the present invention further provides a core network device, which specifically includes: a resource allocation unit 410, configured to notify an office by sending an assignment request message to an access network device if a condition for establishing a local exchange is satisfied. Determining, by the access network device, resources allocated for two calls constituting a session and inquiring whether the access network device is capable of local exchange;
  • the information obtaining unit 420 is configured to obtain, by receiving an assignment completion message returned by the access network device, information about whether the access network device can perform local exchange;
  • the local switching processing unit 430 is configured to: if the access network device is capable of local switching, instruct the access network device to perform local switching; if the access network device cannot perform local switching, continue to complete the assignment process.
  • the embodiment of the present invention further provides a core network device, which specifically includes: a resource allocation unit 410, configured to set to an access network if a condition for establishing a local exchange is satisfied
  • the standby send assignment request message informs the access network device of the resources allocated for the two calls constituting the session and queries whether the access network device can perform local exchange;
  • the information obtaining unit 420 is configured to obtain, by receiving an assignment completion message returned by the access network device, information about whether the access network device can perform local exchange;
  • the local switching processing unit 430 is configured to: if the access network device is capable of local switching, instruct the access network device to perform local switching; if the access network device cannot perform local switching, continue to complete the assignment process.
  • the local exchange processing unit 430 can include:
  • the indicating module 4301 is configured to: after the access network device is capable of performing local exchange, instructing the access network device to perform local exchange after receiving the connected connection message;
  • the assignment module 4302 is configured to continue the assignment process if the access network device is unable to perform local exchange.
  • the core network device may further include:
  • the determining unit 440 is configured to: before the resource allocation unit 410 sends the assignment request message to the access network device, receive the layer 3 information reported by the access network device during the call setup process, and determine whether the layer 3 information is used according to the layer 3 information. Meet the conditions for establishing a local exchange.
  • the specific determination process is similar to the determination process described in the foregoing embodiment, and details are not described herein again.
  • the resource allocation unit instructing the access network device to allocate resources for the two calls constituting the session includes: resources allocated for the local exchange, or resources allocated for the local exchange and a core allocated for the call Network user resources.
  • the assignment request message, the assignment completion message, or a local exchange command message indicating that the access network device performs local exchange may be transmitted on the calling or called SCCP connection.
  • the core network device may be an MSC; the access network device, for example, So is the base station subsystem.
  • the core network device provided by the embodiment of the present invention can determine whether the local exchange can be established in the process of the assignment, and ask the access network device whether it has the capability of establishing a local exchange, so as to better support the supplementary service. For example, call waiting, call hold, multi-party call and lawful interception, etc.; and effectively save the A interface transmission resources; further, by setting the local exchange process after the core network device receives the connection message sent by the called party, it can be avoided
  • the voice quality is affected by the loss of the voice frame caused by the introduction of the local exchange; further, by sending a message on the SCCP connection of a call, such as an assignment request message, an assignment completion message, or a local handover command message, etc., Messages are sent on the SCCP connection, which can reduce the A-interface signaling message and shorten the duration of call setup.
  • An embodiment of the present invention further provides an access network device, including:
  • the access network device may further include, after receiving the assignment request message sent by the core network device, reporting layer 3 information to the core network device, where the layer 3 information is used by the The core network device determines whether the call satisfies a unit that establishes a condition for local exchange.
  • the access network device may be a base station subsystem; the core network device, for example, So MSC.
  • the access network device provided by the embodiment of the present invention can notify the core network whether the access network device has the capability of establishing a local exchange during the assignment process, so as to better support supplementary services, such as call waiting, call hold, and multiple parties. Calling, lawful interception, etc.; further, by receiving the local exchange command sent by the core network after receiving the connected connection message constituting the session, the loss of the voice frame caused by the introduction of the local exchange may be avoided. Voice quality; further, by sending a message on the SCCP connection of a call, for example, assigning a completion message, the assignment completion message is avoided on the SCCP connection of the calling party, thereby reducing the A interface signaling message and shortening the call. The length of time established.
  • the embodiment of the invention further provides a communication system, including:
  • the core network device for example, the MSC, is configured to notify the access network device of the two calls constituting the session by sending an assignment request message to the access network device, such as the base station subsystem, if the condition for establishing the local exchange is satisfied. And the information about whether the access network device can perform local exchange, and obtains information about whether the access network device can perform local exchange by receiving an assignment complete message returned by the access network device, if the access network device The local exchange can be performed, and the access network device is instructed to perform local exchange; if the access network device cannot perform local exchange, the assignment process is continued;
  • the access network device is configured to receive an assignment request message sent by the core network device, allocate a resource for a call constituting a session according to the assignment request information, and notify a result of whether the local exchange can be performed by sending an assignment completion message
  • the core network device receives a local exchange command sent by the core network device, and performs a local exchange operation according to the local exchange command.
  • the core network device is similar to the foregoing core network device embodiment, and the access network device is similar to the foregoing access network device embodiment, and details are not described herein again.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention portent sur un procédé, un appareil et un système d'établissement d'un commutateur local. Le procédé comprend : si les conditions d'établissement d'un commutateur local sont satisfaites, l'indication, par envoi d'un message de requête d'attribution à un sous-système de station de base, au sous-système de station de base de ressources attribuées aux deux appels qui constituent une session, et l'interrogation quant à la capacité du sous-système de station de base à commuter localement; l'acquisition des informations indiquant si le sous-système de station de base est capable de commuter localement par réception d'un message d'achèvement d'attribution renvoyé par le sous-système de station de base; si le sous-système de station de base est capable de commuter localement, l'envoi d'instruction au sous-système de station de base pour commuter localement. Avec les techniques des modes de réalisation de la présente invention, les ressources de transmission de l'interface A sont économisées.
PCT/CN2010/070597 2009-02-11 2010-02-10 Procédé, appareil et système d'établissement d'un commutateur local WO2010091634A1 (fr)

Applications Claiming Priority (2)

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CN200910105352.2 2009-02-11
CN 200910105352 CN101801047B (zh) 2009-02-11 2009-02-11 建立本地交换的方法和核心网设备

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CN102469516A (zh) * 2010-11-04 2012-05-23 中国移动通信集团公司 网络负载控制方法、装置及系统
CN103780579B (zh) * 2012-10-22 2017-02-08 中兴通讯股份有限公司 用于电路交换基站的本地交换控制方法及系统

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US20070287390A1 (en) * 2006-06-09 2007-12-13 Trapeze Networks, Inc. Untethered access point mesh system and method
CN101159905A (zh) * 2007-11-07 2008-04-09 华为技术有限公司 基站控制器内实现本地交换方法、核心网设备及网络系统
CN101272626A (zh) * 2008-04-16 2008-09-24 华为技术有限公司 实现本地交换的方法、装置及系统

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Publication number Priority date Publication date Assignee Title
US20070287390A1 (en) * 2006-06-09 2007-12-13 Trapeze Networks, Inc. Untethered access point mesh system and method
CN101159905A (zh) * 2007-11-07 2008-04-09 华为技术有限公司 基站控制器内实现本地交换方法、核心网设备及网络系统
CN101272626A (zh) * 2008-04-16 2008-09-24 华为技术有限公司 实现本地交换的方法、装置及系统

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