WO2011079788A1 - Procédé d'établissement et de libération de commutateur local inter-centraux et centre de commutation mobile associé - Google Patents

Procédé d'établissement et de libération de commutateur local inter-centraux et centre de commutation mobile associé Download PDF

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Publication number
WO2011079788A1
WO2011079788A1 PCT/CN2010/080420 CN2010080420W WO2011079788A1 WO 2011079788 A1 WO2011079788 A1 WO 2011079788A1 CN 2010080420 W CN2010080420 W CN 2010080420W WO 2011079788 A1 WO2011079788 A1 WO 2011079788A1
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WIPO (PCT)
Prior art keywords
mobile terminal
bss
bsc
local exchange
message
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PCT/CN2010/080420
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English (en)
Chinese (zh)
Inventor
王宝义
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华为技术有限公司
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Publication of WO2011079788A1 publication Critical patent/WO2011079788A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • 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
    • H04W88/12—Access point controller devices
    • 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
    • H04W88/14—Backbone network devices
    • 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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for establishing local exchange between offices, a method for canceling local exchange between offices, and a mobile switching center. Background technique
  • the transmission network is an important part of the wireless communication network. At present, in many countries and regions, the bottleneck of transmission resources connecting the radio access network and the core network affects the deployment, operation and service development of the wireless network by the operator.
  • a mobile switching center performs signaling connection with at least one gateway, and a gateway is wiredly connected to at least one base station subsystem, and each base station subsystem includes a base station controller and a plurality of base stations.
  • the local exchange includes a local exchange within a BTS (Base Transceiver Station) and a local exchange within a BSC (Base Station Controller).
  • the two sides of the session are located in the same BTS, or in the same BTS cluster (for the case of BTS cascading), the loopback of the voice link occurs in the corresponding BTS.
  • the transmission resources of the Abis interface (the interface between the BTS and the BSC in the GSM system) and the A interface (the interface between the BSS and the MSC in the GSM system) can be realized.
  • both parties are located in the same BSC, but in different BTSs (BTS clusters), the voice link loopback occurs in the corresponding BSC.
  • BTS clusters BTS clusters
  • the inventor has found that at least the following problems exist in the prior art: In the prior art, only the intra-office (that is, the master and the called party are all controlled by the same mobile switching center MSC) to establish and release the local exchange scheme is defined. There is no inter-office (that is, the master and the called are controlled by different MSCs) to establish and release the local exchange scheme, which will result in the call of the same BSC across the MSC but in the scenario of MSC Pool, Forwarding and Roaming. The local exchange cannot be used, resulting in a large occupation of the A interface and the Ab is interface of the wired resource. Summary of the invention
  • the purpose of the embodiments of the present invention is to provide a method for establishing and releasing local exchanges and a mobile switching center to reduce the occupation of the A interface and the Abis interface by the interoffice session.
  • the embodiment of the invention provides a method for establishing local exchange between offices, including:
  • the BSC is the same BSC, where the second BSS is a target for performing handover by the first mobile terminal
  • the embodiment of the invention further provides a method for inter-office release local exchange, including:
  • the embodiment of the invention further provides a mobile switching center, including:
  • a determining module configured to determine whether the base station controller BSC in the second base station subsystem BSS and the BSC in which the second mobile terminal is located is the same BSC, wherein the second BSS is a target BSS for performing handover of the first mobile terminal;
  • an indication module configured to: when the BSC in the second BSS is the same as the BSC where the second mobile terminal is located, instruct the second BSS to establish a local exchange between the first mobile terminal and the second mobile terminal;
  • a sending module configured to send an inter-office message to the peer mobile switching center MSC where the second mobile terminal is located, so that the peer MSC determines that the local exchange has been established and instructs the second gateway and the target BSS to release the A established by the second mobile terminal.
  • Port bearer configured to send an inter-office message to the peer mobile switching center MSC where the second mobile terminal is located, so that the peer MSC determines that the local exchange has been established and instructs the second gateway and the target BSS to release the A established by the second mobile terminal. Port bearer.
  • the embodiment of the invention further provides a mobile switching center, including:
  • a receiving module configured to receive an inter-office message sent by the peer mobile switching center MSC, and a determining module, configured to determine, according to the inter-office message, a base station controller BSC in the second base station subsystem BSS and a BSC where the second mobile terminal is located Whether it is the same BSC, wherein the second BSS performs a handover target BSS for the first mobile terminal;
  • an indication module configured to: when the BSC in the second BSS is different from the BSC in which the second mobile terminal is located, instruct the second BSS to cancel the local exchange established for the first mobile terminal and the second mobile terminal, and establish a relationship related to the fourth mobile terminal The A port is carried.
  • the method for establishing the local exchange, the local exchange, and the mobile switching center after switching the B SC by one of the parties performing the call, and determining that the B SCs of the two parties are the same,
  • the MSC sends the target BSC identity of the party that has the handover to the peer MSC, so that the two MSCs indicate that the corresponding gateway and the BSS release the A port bearer corresponding to the two parties, and reduce the interoffice session to the A interface and the Abis interface. Occupation; After one of the parties performing the local session switches the BSC, the local session is released, and the local exchange is established between the offices, and the continuity of the local exchange is achieved.
  • Figure 1 is a schematic diagram of local exchange in an intra-office session
  • FIG. 2 is a schematic flowchart of an embodiment of a method for establishing local exchange between offices according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a specific embodiment of a method for establishing local exchange between offices according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of an embodiment of a method for canceling local exchange in the embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a specific embodiment of a method for canceling local exchange between offices according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a framework of an embodiment of a mobile switching center according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of another embodiment of a mobile switching center according to an embodiment of the present invention.
  • An embodiment of the present invention provides a method for establishing a local exchange between offices, as shown in FIG. 2, including:
  • the second BSS is a target BSS that performs handover by the first mobile terminal.
  • the method further includes: the first MSC instructing the second BSS to prepare the radio bearer for the first mobile terminal.
  • the method further includes: the first MSC instructing the first gateway and the second BSS to establish an A port bearer for the first mobile terminal.
  • the first gateway After the handover, the first gateway provides an A interface for the first mobile terminal, and the second gateway provides an A interface for the second mobile terminal before and after the handover.
  • the first MSC indicates that the second BSS establishes a local bearer for the first mobile terminal and the second mobile terminal
  • the first MSC instructs the first gateway and the second BSS to release the bearer established for the first mobile terminal.
  • the first MSC After the first mobile terminal switches from the first BSS to the second BSS, the first MSC sends an interoffice message to the second MSC, and the second MSC determines, according to the interoffice message, that the local exchange has been established, indicating the second BSS and the second The gateway releases the A port bearer established for the second mobile terminal.
  • the interoffice message is a local call local exchange LCLS message or an INF information message, and may include a B SC identifier of the second B SS, and may further include an indication that the local exchange has been established.
  • the second MSC determines, according to the received BSC identifier, that the BSC where the first mobile terminal and the second mobile terminal are located is the same, and sends a local exchange establishment request to the second BSS, according to the received second
  • the local exchange setup response sent by the BSS determines that a local exchange between the first mobile terminal and the second mobile terminal has been established.
  • the MSC to which the handover party belongs After one of the parties performing the interoffice call switches the BSC, if it is determined that the BSCs of the two parties are the same, the MSC to which the handover party belongs sends the target BSC identity of the handover party to the opposite MSC, so that The two MSCs indicate that the corresponding gateway and the BSS release the A-port bearer corresponding to the two parties, which reduces the occupation of the A-interface and the Abis interface by the inter-office session.
  • the first mobile terminal is performing an inter-office call with the second mobile terminal.
  • the step S101 may specifically include the following steps:
  • the first MSC receives the handover request handover required message sent by the first BSS where the first mobile terminal is located, where the handover request carries the identifier of the target cell, and the first MSC according to the correspondence between the pre-stored cell identifier and the BSS
  • the target side BSS to be switched by the first mobile terminal is found, and the target side BSS is the second BSS in this embodiment;
  • the first MSC sends a bearer ADD REQ message to the first gateway, and applies for the switched A port bearer for the first mobile terminal.
  • the first MSC also applies for the A interface to the second BSS at the same time, so that The first gateway can establish an A port with the second BSS; the first gateway provides the A port for the first mobile terminal after the handover;
  • the first gateway returns a setup bearer response ADD Reply message to the first MSC, indicating that the A port is successfully established.
  • the first MSC determines that the BSC where the first mobile terminal is switched and the BSC where the second mobile terminal is located is the same BSC, and sends a handover request handover request message carrying the local exchange indication to the second BSS, indicating the second
  • the BSS establishes a local exchange for the first mobile terminal and the second mobile terminal, and prepares a radio bearer for the first mobile terminal;
  • Step S103 may specifically include the following steps: SI 16, the first MSC sends a handover command handover command message to the first BSS, instructing the first BSS to switch the first mobile terminal;
  • the second BSS After completing the handover to the first mobile terminal, the second BSS sends a handover completed complete message to the first MSC, and notifies the first MSC that the handover of the first mobile terminal is completed.
  • the first MSC sends a local call local exchange LCLS message carrying the identifier of the target BSC where the first mobile terminal is located to the second MSC where the second mobile terminal is located.
  • the first MSC may also send the bearer to the second MSC.
  • the information INF message of the identifier of the target BSC, after receiving the INF message, the second MSC needs to return an information request INR message; the LCLS message and the INF message may also carry an indication that the local exchange has been established.
  • the LCLS message in the embodiment of the present invention may be a new MAP (Mobile Application Part) message, as shown in Table 1, and includes the following fields:
  • the value of the Access Network Signaling Point Code is the target BSC ID of the first mobile terminal after the handover.
  • the LCLS ind value can be: LCLS establishment request, LCLS establishment permission, LCLS establishment rejection, LCLS release request, LCLS release permission, LCLS Decommission, LCLS Restriction, or Local Exchange has been established.
  • the INF message in the embodiment of the present invention may be an extended ISUP (ISDN User Part) message, as shown in Table 2, including the following fields:
  • ISUP ISDN User Part
  • the field Information indicators (national use) is used to indicate the validity of the field behind it. If it is 0, it means the following field is invalid. If it is 1, it means the following field is valid.
  • the value of the newly added Access Network Signaling Point Code is The target BSC ID of the first mobile terminal is switched.
  • the value of the added LCLS ind can be: LCLS establishment request, LCLS establishment permission, LCLS establishment rejection, LCLS release request, LCLS release permission, LCLS release rejection, LCLS restriction, or local.
  • the exchange has been established.
  • the INR message is also modified, as shown in Table 3, including the following fields:
  • the information request indicators are used to indicate the validity of the following fields.
  • the value of the added LCLS Ind can be: LCLS establishment request, LCLS establishment permission, LCLS establishment rejection, LCLS release request, LCLS release permission. , LCLS release rejection or LCLS restrictions.
  • step S120 the first MSC sends a clear command Clear command to the first BSS, indicating that the first B S S is released as a radio bearer established by the first mobile terminal;
  • Step S102 may include steps S122 and S123:
  • the first MSC sends a delete request SUB REQ message to the first gateway, indicating that the first gateway releases the A port bearer established for the first mobile terminal;
  • step S122 the first MSC further instructs the second BSS to release the A interface allocated to the first mobile terminal, so that the second BSS and the first gateway release the A port bearer established by the first mobile terminal.
  • the first gateway returns a delete response SUB REPLY message to the first MSC.
  • the second MSC determines that the first mobile terminal and the second mobile terminal have established local exchange by using the foregoing two manners, and sends a local exchange command Local Switch Command message to the second B SS. Instructing the second BSS to establish a local exchange;
  • the second BSS returns a local exchange complete Local Switch Complete message to the second MSC. Because the local exchange has been established by the first MSC, where the second BSS returns a response to the second MSC, there is no actual action.
  • the second MSC sends a delete request SUB REQ message to the second gateway, instructing the second gateway to release the bearer established for the second mobile terminal;
  • the second MSC also instructs the second BSS to release the A interface allocated for the second mobile terminal, so that the second BSS and the second gateway release the A port bearer established for the second mobile terminal.
  • the second gateway MGW returns a delete response SUB REPLY message to the second MSC.
  • the interoffice local exchange establishment between the first mobile terminal and the second mobile terminal is completed.
  • the first gateway and the second gateway may also be the same one; and some steps related to the handover process are omitted in the foregoing process, for example, the first BSS is automatically released as the first after the first mobile terminal switches.
  • the A interface allocated by the mobile terminal, the first MSC indicates that the gateway where the first mobile terminal is located before the handover is released as the A interface and the like allocated by the first mobile terminal, but does not affect the understanding of the technical solution disclosed in this embodiment.
  • the embodiment provides a method for canceling the local exchange between the parties. As shown in FIG. 4, the method includes: S201, establishing an A port bearer associated with the third mobile terminal;
  • the third MSC indicates that the third gateway and the third BSS are the first
  • the third mobile terminal establishes an A port bearer
  • the method further includes: the third MSC instructing the third BSS to prepare a radio bearer for the third mobile terminal.
  • the third mobile terminal is switched from the fourth BSS to the third BSS.
  • the interoffice message is defined in the first embodiment, and the interoffice message includes the BSC identifier of the third BSS.
  • the method for releasing the local exchange provided by the embodiment can be well coordinated with the first embodiment, and the local exchange between the local exchange and the local exchange can be further implemented.
  • the third mobile terminal is in the process of making a call with the fourth mobile terminal by using the local exchange.
  • the step S201 may specifically include the following steps:
  • the third M S C receives the handover request handover required message sent by the fourth B S S where the third mobile terminal is located;
  • the third MSC sends a bearer ADD REQ message to the third gateway, and applies for the bearer after the handover to the third mobile terminal.
  • the third MSC also applies for the A interface to the fourth BSS to enable the third gateway.
  • the A port can be established with the fourth B SS; the third gateway provides the A port bearer for the third mobile terminal after the handover;
  • the third gateway returns an ADD Reply message to the third MSC, indicating that the A port is successfully established.
  • the third MSC sends a handover request handover request message to the third BSS, instructing the third BS S to prepare a radio bearer for the third mobile terminal.
  • Step S202 may specifically include the following steps:
  • the third MSC sends a handover command handover command message to the fourth BSS, instructing the fourth BSS to switch to the third mobile terminal. After the third BSS detects the access of the third mobile terminal, the third BSS sends a handover detection handover detect message to the third MSC.
  • the third BSS After the third BSS completes the handover to the third mobile terminal, the third BSS sends a handover completion complete message to the third MSC, and notifies the third MSC that the handover of the third mobile terminal is completed.
  • the third MS C sends an LCLS message carrying the identifier of the target BSC where the third mobile terminal is located to the fourth MSC where the fourth mobile terminal is located.
  • the third MSC may also send the fourth MSC with the target BSC.
  • the identified information INF message after receiving the INF, the fourth MSC needs to return an information request INR message;
  • step S220 the third MSC sends a clear command Clear command to the fourth BSS, indicating that the fourth B S S is released as a radio bearer established by the third mobile terminal;
  • Step S203 may specifically include the following steps:
  • the fourth MSC After receiving the target BSC identifier sent by the third MSC, the fourth MSC determines that the BSC where the third mobile terminal and the fourth mobile terminal are located are not the same BSC, and needs to release the local exchange, and then send the local exchange to the fourth BSS. Release the Local Switch Release message, instructing the fourth BSS to release the local exchange;
  • the fourth BSS returns a local exchange release completion message to the fourth MSC.
  • Step S204 may specifically include the following steps:
  • the fourth MSC sends a bearer ADD REQ message to the fourth gateway, and instructs the fourth gateway to establish an A port bearer for the fourth mobile terminal.
  • step S224 the fourth MSC further instructs the fourth BSS to allocate an A interface to the fourth mobile terminal, so that the fourth BSS and the fourth gateway establish an A port bearer for the fourth mobile terminal.
  • the fourth gateway returns an ADD Reply message to the fourth MSC, indicating that the A port is successfully established.
  • the fourth MSC sends an assignment request to the fourth BSS, and the fourth BSS is configured to prepare a radio bearer for the fourth mobile terminal.
  • the fourth BSS returns an assignment to the fourth MSC to complete the Assignment Complete message. Because the fourth mobile terminal can continue to use the radio bearer before the handover, the fourth BSS does not prepare the radio bearer for the fourth mobile terminal, and only returns one. response.
  • the inter-office local exchange between the third mobile terminal and the fourth mobile terminal is released.
  • the third gateway and the fourth gateway may also be the same one; and some steps related to the handover process are omitted in the foregoing process, for example, the fourth BSS is automatically released as the third after the third mobile terminal switches.
  • the A interface is allocated by the mobile terminal, and the third MSC indicates that the gateway where the third mobile terminal is located before the switchover releases the A interface assigned to the third mobile terminal, but does not affect the understanding of the technical solution disclosed in this embodiment.
  • the method for canceling the local exchange in the inter-office manner of the present embodiment provides a scheme for canceling the local exchange between the inter-offices, and can cooperate well with the first embodiment to further implement the local exchange between the inter-office and the coherence of the local exchange.
  • Embodiment 3
  • This embodiment provides a mobile switching center. As shown in FIG. 6, the method includes: a determining module 10, an indicating module 20, and a sending module 30.
  • the determining module 10 is configured to determine whether the BSC in the second BSS and the BSC in which the second mobile terminal is located are the same BSC, where the second BSS is a target BSS in which the first mobile terminal performs handover.
  • the indication module 20 is configured to: when the BSC in the second BSS is the same as the BSC where the second mobile terminal is located, instruct the second BSS to establish a local exchange between the first mobile terminal and the second mobile terminal.
  • the sending module 30 is configured to send an inter-office message to the opposite MSC where the second mobile terminal is located, so that the peer MSC determines that the local exchange has been established and instructs the second gateway and the target BSS to release the A established by the second mobile terminal. Port bearer.
  • the inter-office message sent by the sending module is a local call local exchange LCLS message or an INF information message; the inter-office message includes a B SC identifier of the second B SS, and may further include an indication that the local exchange has been established.
  • the gateway and the base station subsystem release the corresponding A port bearer by establishing a local connection, thereby reducing the interoffice session. Occupancy of the A interface and the Abis interface.
  • the receiving module 11 includes a receiving module 11, a determining module 22, and an indicating module 33.
  • the receiving module 11 is configured to receive an inter-office message sent by the peer mobile switching center MSC;
  • the determining module 22 is configured to determine, according to the inter-office message, whether the BSC in the second BSS and the BSC in which the second mobile terminal is located are the same BSC, where the second BSS performs the handover target for the first mobile terminal. BSS;
  • the indication module 33 is configured to: when the BSC in the second BSS is different from the BSC where the second mobile terminal is located, instruct the second BSS to release the local exchange established for the first mobile terminal and the second mobile terminal, establishing and fourth The A port bearer associated with the mobile terminal.
  • the interoffice message received by the receiving module 11 is a local call local exchange LCLS message or an INF information message; the interoffice message includes a B SC identifier of the second B SS.
  • the local connection is instructed, and the gateway and the base station subsystem are instructed to establish a corresponding A-port bearer, thereby ensuring the establishment of the local exchange. , to remove the consistency of local exchanges.
  • the method includes the following steps: determining whether the BSC in the second BSS and the BSC in which the second mobile terminal is located is the same BSC, where the second BSS is a target BSS for performing handover of the first mobile terminal; if yes, indicating the second BSS Establishing a local exchange for the first mobile terminal and the second mobile terminal; releasing an A-port bearer associated with the first mobile terminal; and transmitting an inter-office message to the second mobile switching center MSC where the second mobile terminal is located, so that the second MSC determines The local exchange establishes and instructs the second gateway and the target BSS to release the A-port bearer established for the second mobile terminal.
  • the storage medium such as: OM / RAM, disk, optical disk, and the like.

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

Abstract

Le mode de réalisation de la présente invention porte sur un procédé d'établissement et de libération d'un commutateur local inter-centraux et sur un centre de commutation mobile associé, le procédé d'établissement de commutateur local inter-centraux comprenant les étapes consistant à : déterminer si un centre de station de base (BSC) dans un second sous-système de station de base (BSS) est ou non le même qu'un BSC sur lequel se trouve un second terminal mobile, le second BSS étant un BSS cible vers lequel un premier terminal mobile se transfère ; si c'est le cas, donner alors au second BSS l'instruction d'établir un commutateur local pour le premier terminal mobile et le second terminal mobile ; libérer un porteur d'interface A relatif au premier terminal mobile ; et adresser un message d'échange à un second centre de commutation mobile (MSC) sur lequel se trouve le second terminal mobile, de manière à ce que le second MSC détermine qu'un commutateur local a été établi et donne l'instruction à une seconde passerelle et au BSS cible de libérer la porteuse d'interface A établie pour le second terminal mobile. Au moyen du procédé d'établissement d'un commutateur local inter-centraux, on peut réduire l'occupation de l'interface A.
PCT/CN2010/080420 2009-12-31 2010-12-29 Procédé d'établissement et de libération de commutateur local inter-centraux et centre de commutation mobile associé WO2011079788A1 (fr)

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CN101754416B (zh) * 2009-12-31 2012-01-25 华为技术有限公司 局间建立、解除本地交换的方法和移动交换中心
WO2012000175A1 (fr) * 2010-06-29 2012-01-05 中兴通讯股份有限公司 Procédé et système de libération d'un central local
ES2657617T3 (es) * 2011-03-04 2018-03-06 Telefonaktiebolaget Lm Ericsson (Publ) Conmutación local de llamada local en traspaso

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