WO2009067912A1 - Procédé et dispositif de commutation pour mettre en œuvre une commutation - Google Patents

Procédé et dispositif de commutation pour mettre en œuvre une commutation Download PDF

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Publication number
WO2009067912A1
WO2009067912A1 PCT/CN2008/072995 CN2008072995W WO2009067912A1 WO 2009067912 A1 WO2009067912 A1 WO 2009067912A1 CN 2008072995 W CN2008072995 W CN 2008072995W WO 2009067912 A1 WO2009067912 A1 WO 2009067912A1
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WIPO (PCT)
Prior art keywords
local exchange
access network
service end
service
information
Prior art date
Application number
PCT/CN2008/072995
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English (en)
French (fr)
Inventor
Wulin Weng
Jun Qin
Original Assignee
Huawei Technologies Co., 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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009067912A1 publication Critical patent/WO2009067912A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00Packet switching elements
    • H04L49/10Packet switching elements characterised by the switching fabric construction

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and a switching device for implementing switching.
  • a local switching communication method is proposed, that is, when the base station subsystem supports local switching, the same base station Within the subsystem coverage area, information exchange between different users can be done within the base station subsystem.
  • the base station subsystem cannot encode and decode the information of the mobile station (MS), and therefore, local exchange can only be implemented between two MSs of the same codec type.
  • the local exchange is implemented inside the base station subsystem.
  • the Mobile Switching Centre (MSC) cannot know whether the call between the two MSs is locally exchanged in the base station subsystem.
  • An embodiment of the present invention provides a method for implementing an exchange, where the method includes:
  • the local exchange is triggered according to the location information, and the indication information is sent to the access network, where the indication information is used to indicate that the access network performs local exchange.
  • the embodiment of the invention further provides a method for implementing exchange, the method comprising:
  • An embodiment of the present invention further provides a switching device, where the switching device includes:
  • An information unit configured to obtain location information of the service end
  • a determining unit configured to determine, according to the location information acquired by the information unit, whether to trigger a local exchange
  • an indication unit configured to send, by the determining unit, when the local exchange is triggered, the indication information is sent to the access network, where the indication information is used to indicate that the access network performs local exchange.
  • the present invention also provides a switching device, the switching device comprising:
  • a receiving unit configured to receive indication information for performing local exchange of the service end, where the indication information includes information of the service end;
  • a negotiation unit configured to negotiate a codec type of the service end according to the information of the service end
  • an execution unit configured to determine whether to perform local exchange according to the result of the negotiation.
  • Local exchange in the background art is implemented internally by each base station subsystem, and each base station subsystem may be provided by different equipment vendors, and local exchange according to its local policy is difficult to standardize.
  • the method and the switching device implemented by the embodiment of the present invention determine that the local exchange can be triggered, send indication information to the access network, instruct the access network to perform local exchange, and separate the control function for performing local exchange from the access network.
  • Centralized control of the local exchange of the access network so that the local exchange no longer depends on the local policy of the access network, making the application of the local exchange more flexible, easy to promote as a standard, and reducing the cost of promotion and application.
  • Embodiment 1 is a schematic flowchart of Embodiment 1 of a method for implementing switching
  • Embodiment 2 is a schematic flowchart of Embodiment 2 of a method for implementing switching
  • Embodiment 3 is a schematic flowchart of Embodiment 3 of a method for implementing switching
  • FIG. 4 is a schematic structural diagram of an embodiment of a switching device
  • FIG. 5 is a schematic structural diagram of another embodiment of a switching device
  • FIG. 6 is a schematic structural diagram of still another embodiment of a switching device.
  • Embodiment 1 A method for implementing switching, see FIG. 1, the method includes:
  • the location information is used to provide a location of the service end within the access network, and the location information may be cell information.
  • One or more kinds of information such as routing area information, location area information, and IP address.
  • the service includes a voice service or a data service.
  • the data service may be one or more of an image service, a fax service, and a text service.
  • the service end refers to a terminal that implements a service, and the terminal may include an MS, a fixed terminal, or a multimedia terminal.
  • the service end is different according to the type of service, and generally includes two or more.
  • the service end is two; when the service involves multiple terminals, for example, Multi-party conferences, mass mailings, group texting, etc., the business side can be multiple.
  • An access network refers to a network that provides access services for terminals, such as a base station subsystem in 2G (Base).
  • BSS BSS
  • GSM/EDGE Radio Access Network GERAN
  • UTRAN UMTS Terrestrial Radio Access Network
  • the calling MS is obtained according to the information carried by the calling MS's call request process or the call setup process.
  • the cell information acquires the cell information of the called MS according to the paging response message of the called MS.
  • the cell information of the corresponding service end can also be obtained directly according to the request message of the service end.
  • the indication information is sent to the access network, where the indication information is used to instruct the access network to perform local exchange.
  • the coverage area of the same access network may refer to an area controlled by the same controller unit in the access network, or may be an area controlled by different controller units, and signaling and/or service chains may be established between these controller units. road.
  • the indication information may be directly sent to the access network, and is generally sent to the controller unit in the access network, and the access network controller unit (such as a base station controller (BSC)) is prepared to prepare for local exchange, and will need to The information about the local exchange is communicated to the controller unit; the indication information may also be carried in the message sent to the access network, for example, for the voice call service, an Assignment Request message may be sent to the access network. Carry the indication information.
  • the indication information may include information capable of identifying a service terminal that needs to be locally exchanged, and may include information of all or part of the service terminals that need to be locally exchanged, such as a terminal identifier IMSI/TMSI, a circuit identification code (CIC), and the like.
  • the local exchange in the background art is implemented internally by the network.
  • the intrusion network may be provided by different equipment vendors, and the local exchange is implemented according to the local policy of the network, and no standardized method is provided.
  • the method for implementing the exchange in this embodiment determines that when the local exchange needs to be triggered, the indication information is sent to the access network, the access network is instructed to perform local exchange, and the control function for performing local exchange is separated from the access network, and the access is performed.
  • the local exchange of the network is centrally controlled, so that the local exchange no longer depends on the local policy of the access network.
  • the standard interface signaling makes the application of the local exchange more flexible, and is easy to promote as a standard, which reduces the promotion and application. cost.
  • the access network may perform the coding and decoding type negotiation of the service end.
  • the access network knows the codec type of each service and the supported codec types. Codec type negotiation is generally performed by the access network controller unit, such as BSC. For the access network area controlled by the same controller unit, the codec can complete the negotiation without signaling interaction. For the access network area controlled by different controller units, the signaling connection needs to be established through the established link. To complete the negotiation.
  • the first type when the codec type of the service end is the same, that is, the codec mode and rate of the service end are the same, the access network controller unit replies to the accept message, accepts and starts the local exchange, and the local exchange can be performed without the code converter ( Transcoder, TC or Transcoder & Rate Adaptation Unit (TRAU) directly loops back inside the access network, which can reduce the configuration of TC/TRAU resources and transmission resources between the access network and the core network. cost.
  • the loopback can be configured by configuring the internal switch chip or switch module of the access network to set the entry and exit of the service data inside the access network.
  • the access network controller unit replies to the accept message, accepts and starts the local After the exchange, the local exchange is implemented in the access network through the TC/TRAU. In this way, the link resources through the TC/TRAU need to be established.
  • the reply indicates that the message is not accepted, indicating that the local exchange is not started.
  • the terrestrial channel resource established for the service between the access network and the access network is released. The link can be maintained, thereby saving ground link resources between the access network and reducing transmission costs.
  • one or more signaling links and terrestrial links may have been established between the access network and the core network for one or more of the parties in the caller, and then the access network After accepting the local exchange, the ground link resource is released.
  • the above-mentioned terrestrial link resource is the service channel in the embodiment, and the service channel is used to transmit data of the service, and cooperates with the signaling link to implement the corresponding service.
  • the service channel can also be an Internet Protocol (IP) link, an Asynchronous Transfer Mode (ATM) link, and the like.
  • the information of the service channel can be saved to provide operational parameters for subsequent operations, such as re-establishing a service channel, thereby improving the efficiency of subsequent operations.
  • the service channels may not be allocated for some of the service terminals, but the service channel information needs to be established for these service terminals, and the operation parameters are provided for subsequent operations, such as identifying the service end when starting the local exchange.
  • the local exchange can be interrupted for the needs of other functions.
  • the MSC can interrupt the local exchange and send a release command to the access network. Instructing the access network to release the local exchange. After the local exchange is released and the ground link resources between the access network and the core network are restored, the MSC forwards the service data to the monitoring center.
  • the method for implementing the exchange in this embodiment can release or restore the local exchange on the access network side during the service progress, thereby improving the flexibility of the local switching application.
  • the function of the method for implementing the exchange in the first embodiment can be set independently, or can be integrated in the MSC, or integrated in other network devices. In this embodiment, the function of the method for controlling the local exchange is integrated in the embodiment.
  • the MSC the method for implementing the exchange in the first embodiment is applied to the voice call service, and after the MSC obtains the location of the MSs to be called, it is determined whether the local exchange can be initiated on the BSS side, that is, whether the local exchange on the access network side can be initiated. Referring to FIG. 2, the specific process is as follows: After the call setup process is completed, the MSC requests the calling party to establish the air interface channel and the A interface ground link resource after receiving the call setup process. Side allocation After the Assignment Complete message, the MSC pages the called MS.
  • the MSC receives the paging response (Paging Response) message of the called MS, the cell information of the called MS is obtained. If both parties of the call are located in the coverage of the same BSS, it may decide to trigger the local exchange on the access network side.
  • Paging Response paging response
  • the cell location of the calling MS can be obtained before receiving the paging response of the called MS, such as the cell information carried in the layer 3 signaling (COMPLETE LAYER 3 INFORMATION message) during the call setup process.
  • the cell information carried in the layer 3 signaling such as the cell information carried in the layer 3 signaling (COMPLETE LAYER 3 INFORMATION message) during the call setup process.
  • the access network's support capability for local exchange can be considered.
  • the access network can notify the MSC of the local exchange capability on the A-port signaling, such as the channel request. If the MSC does not obtain the support information of the multi-local exchange of the access network on the A-port signaling sent by the BSS, according to the configuration, the BSS does not support the local exchange by default, or the BSS supports the local exchange by default.
  • the MSC carries the local exchange related information through the signaling, and the BSC is required to prepare the local exchange.
  • the new signaling may be used to carry the local exchange related information, or may carry the local signaling in the original signaling.
  • Exchange related information such as: Carry a new "Speech with Local Switching" indication value in the "Channel Type IE" in the Assignment Request message of the called MS.
  • the calling MS has established the ground link resource of the A port, and the MSC and the BSC may use the Circuit Identification Code (CIC) to identify the ground chain. Road resources.
  • the MSC needs to send the local exchange related information and the service information related to the local exchange to the BSC, such as carrying the newly added indication in the allocation request message, and notifying the BSC of the CIC identifying the calling ground link resource to inform the BSC of the local exchange.
  • the new Pairing Circuit Identity Code IE the format is the same as the existing Circuit Identity Code IE).
  • the BSS receives the Assignment Request message, and if the BSS can support the local exchange, the local exchange starts judgment.
  • the BSS supporting the local exchange needs to configure the correspondence between the CIC and the MS, so that when the new Assignment Request message of the called MS is received, the MSs of the calling parties can be associated to determine the two MSs that initiate the local exchange.
  • the codec type negotiation is performed, because the BSS knows the voice codec class of the MS of the call. Speech Codec Types and Supported Codec List, so codec negotiation can be performed inside the BSS.
  • the negotiation results are divided into three types:
  • the first one find the codec type (Codec) that is consistent with both parties.
  • the BSS replies to the Assignment Complete message of the MSC-Called MS, and the Assignment Complete message contains new indication information, informing the MSC to accept the local exchange and the local exchange is successfully initiated, for example, the Local Switching Indicator can be used.
  • the BSS needs to perform local exchange preparation to adjust the link established internally for the call, such as reconfiguring the internal switch chip or switching unit, so that the voice can directly loop back without going through the TC/TRAU. And not sent outside the access network;
  • the indication of the Local Switching Indicator contained in the Assignment Complete message has two values, one of which indicates that the current local exchange is accepted and successfully established, such as a non-all zero value can be used; the other represents that the current local exchange does not accept or fails to establish, Correspondingly, all zero values can be used. If the Local Switching Indicator indication is not included in the Assignment Complete message, the local exchange is not supported or the startup fails.
  • the Assignment Complete message of the Indicator notifies the MSC of the local exchange acceptance, and indicates that the local exchange establishment is successful. Also, before replying to the Assignment Complete message, the BSS needs to perform local exchange preparation, such as adjusting the link established internally for the call, such as reconfiguring the internal switch chip or switching unit, so that the voice needs to pass through the TC/TRAU loopback. , but not sent outside the access network.
  • the codec is not compatible or the BSS does not support local exchange and cannot initiate local exchange.
  • the BSS reply does not carry a Local Switching Indicator or an Assignment Complete message that carries a local exchange that does not accept or establish a failure indication. This service is handled in the traditional normal voice connection mode.
  • the local exchange start judgment will not be made, and the allocation request message containing "Speech with Local Switching" will be ignored.
  • the Local Switching Indicator cell can contain two parts: Local switching startup identifier and local switching mode, as defined below:
  • the local exchange startup identifier can take different values to indicate: 1. Codec is not compatible;
  • the codec is the same, that is, the two sides of the call use exactly the same codec, including full rate, half rate and AMR codec;
  • codec compatible that is, the caller uses a compatible codec.
  • the local exchange mode can take different values to represent:
  • a BTS group refers to a set of one or more BTSs, which can be exchanged locally, without going through the BSC;
  • the local exchange within the BSC covers local switching within the BTS and local switching within the BTS group.
  • Signaling link include, but are not limited to, SCCP connections.
  • the release process may be initiated by the MSC to indicate the ground link to be released by signaling.
  • the method for identifying the CIC is used to release the ground link corresponding to the CIC, but the CIC identifier is not released, that is, the MS of the calling party needs to be reserved.
  • both the MSC and the BSC need to maintain the correspondence between the MS and the CIC for local exchange release and recovery, and release the terrestrial link resources to enable use by other calls.
  • the reason for the need to increase the release in the release process is that the circuit is released due to the local exchange and does not affect the normal operation of the signaling link and the call. If the blocking circuit can be used to release the ground circuit, a new cause value is added to the blocking message (Block) to release the A port resource. After completion, the BSC sends a Block Acknowledge to the MSC.
  • the MSC can use the RESET CIRCUIT process to deactivate the local exchange. You can then re-use the Block process to enter the local exchange state and release the ground circuit.
  • the release process can also be initiated by the BSC. After the local exchange is successful, you can choose to send it. The release process is initiated before or after the Assignment Complete message.
  • the third embodiment is similar to the second embodiment.
  • the MSC starts the local exchange judgment
  • the ground link resource is not established for the calling MS or the called MS.
  • the MSC obtains the location of the MSs to be called, it can determine whether the local exchange can be initiated on the BSS side, that is, whether the local exchange on the access network can be initiated. Referring to FIG. 3, the specific process is as follows:
  • the MSC will page the called MS before establishing the air interface and the A interface ground link resources on the calling side.
  • the MSC receives the paging response (Paging Response) message of the called MS, and obtains the cell information of the called MS, it can decide whether to trigger the local exchange on the access network side. If both parties of the call are in the coverage of the same BSS, it may be decided to trigger the local exchange on the access network side.
  • Paging Response paging response
  • the cell location of the calling MS can be obtained before receiving the paging response of the called MS, such as the cell information carried in the layer 3 signaling (COMPLETE LAYER 3 INFORMATION message) during the call setup process.
  • the cell information carried in the layer 3 signaling such as the cell information carried in the layer 3 signaling (COMPLETE LAYER 3 INFORMATION message) during the call setup process.
  • the ground link resource of the A port has not been established for the calling MS.
  • the method for triggering the local exchange has the following two situations:
  • the MSC first establishes an A-port ground link for the calling MS.
  • Sending an allocation request to the BSS request establishes an air interface and an A port transmission for the calling MS, and triggers the local exchange after receiving the Assignment Complete message of the calling MS;
  • the MSC does not establish an A-port ground link for the calling MS, but needs to assign corresponding identification information, such as CIC, to the calling MS to enable identification of the calling MS when the local switching starts.
  • the MSC sends a signaling indicating that the BSS needs to initiate a local exchange, and the signaling includes the identifier of the MS of the calling party, such as using TMSI or IMSI for identification.
  • the message can extend the Assignment Request message or use a new message.
  • the BSS After the BSS receives the indication message, if the BSS can support the local exchange, the local exchange is initiated. If the local exchange condition is met, the BSS needs to perform local exchange preparation to adjust the link established for the call internally, so that the voice is looped back locally, not sent to the access network, and the MSC is notified.
  • the starting method is the same as the second embodiment
  • step 301 2 For the trigger condition in step 301 2), after the codec type negotiation is successful, the same is found. Or compatible codec type, and after completing the local exchange preparation, send an acknowledgement message to the MSC to inform the local exchange to start successfully.
  • the local exchange start determination will not be performed.
  • the coverage area of the access network in this embodiment may include different BSSs in the same MSC or different BSSs in different MSCs.
  • different BSSs in the same MSC when using an IP link as a traffic channel, local switching can occur between different BSSs.
  • the MSC starts the local exchange judgment, it determines whether the access network side local exchange can be started after the MSC obtains the location of all the MSs to be called:
  • the MSC obtains the location of all the MSs involved in the call, it is determined whether the local exchange is triggered. If the following conditions are met, the local exchange may be triggered: the BSSs of the MSs involved in the call may reach each other, for example, the BSS may be established.
  • the service link through the direct communication of the core network the BSC can establish a service link that does not pass through the direct communication of the core network, and the BTS can establish a service link that does not communicate directly through the core network.
  • the BSS or MSC tries to negotiate the same or compatible codec type for all MSs.
  • the MSC sends an indication to each BSS to initiate a local exchange.
  • each BSS needs to know the transmission information of the current call in other BSS, such as the IP address assigned by the BSS or MSC for this call, UDP.
  • the port number, etc. requires the MSC to transfer the transmission information of the call between the BSSs.
  • the BSS involved in the call can use the same call identifier to identify the call, such as CIC, etc., and the call identifier is specified by the MSC or BSS; different call identifiers can also be used.
  • the BSS After receiving the indication message, the BSS performs a local exchange start determination if the BSS can support the local exchange. If the local exchange condition is met, the BSS needs to perform local exchange preparation, for example, changing the destination IP address and UDP port number of the call, so that the voice data of the call can be directly transmitted to another BSS without passing through the core network, and can receive from another BSS voice data; if the BSS does not support local exchange, the local exchange start judgment will not be performed. After completion, the voice data of this call is transmitted directly between the BSSs without going through the core network.
  • the local exchange trigger judgment is performed by each MSC or one of the MSCs, and when it is judged that the local exchange can be triggered, the local exchange is initiated. Can pass The signaling is interacted so that all the involved MSCs can uniformly recognize whether the local exchange is started. By transmitting signaling between the MSCs, the BSSs mutually obtain transmission information of the current call of another BSS.
  • the method for implementing the switching in the foregoing embodiment is such that the local switching is no longer dependent on the local policy of the access network, and different BSSs in the same MSC or different BSSs in different MSCs can be locally exchanged, so that the local switching application is more Flexible, easy to promote as a standard, reducing the cost of promotion and application.
  • Embodiment a switching device, see FIG. 4, includes:
  • the information unit 401 is configured to obtain location information of the service end, such as cell information.
  • the determining unit 402 is configured to determine, according to the location information, whether the local exchange can be triggered;
  • the indicating unit 403 is configured to: when it is determined that the local exchange needs to be triggered, send indication information to the access network, where the indication information is used to instruct the access network to initiate local exchange.
  • the switching device of this embodiment When the switching device of this embodiment is used to determine that the local exchange can be triggered, the indication information is sent to the access network, and the access network is instructed to initiate local exchange, and a standardized method for centralized control of the local exchange of the access network is provided, so that the local exchange is performed. It no longer relies on the local policy of the access network, making the application of local exchange more flexible and easy to promote.
  • the determining unit may include: a module for determining whether the service end that is performing the same service can trigger the local exchange.
  • the indicating unit may include: means for carrying the indication information in signaling (such as an allocation request message) sent to the access network.
  • the indication unit also receives local exchange initiation acknowledgment signaling for the access network.
  • the indicating unit generally performs signaling interaction with a controller unit in the access network, such as BSC in GSM.
  • the switching device can also include:
  • a link unit configured to establish a signaling link and/or a service channel with the access network.
  • the switching device can also include:
  • a release unit configured to release a service channel between the access network and the access network.
  • a service channel may also be established with the access network. After the access network accepts the local exchange, the service channel between the access network and the access network may be released.
  • the switching device can also include:
  • the release unit sends a release command to the access network when the local exchange needs to be released, and the release command is used to instruct the access network to cancel the local exchange.
  • the release unit also receives a deassert message replied from the access network.
  • the local exchange can be interrupted for the needs of other functions.
  • the MSC can interrupt the local exchange and send a release command to the access network.
  • the access network cancels the local exchange.
  • the MSC forwards the service data to the monitoring center.
  • the local switching on the access network side can be released or restored during the service progress, and the local switching application scenario is extended.
  • the switching device in this embodiment can be set independently or in the MSC to implement local BSS local switching control.
  • Embodiment a switching device, see FIG. 5, includes:
  • the receiving unit 501 is configured to receive indication information for performing local exchange of the service end.
  • the control unit 502 is configured to prepare a local exchange according to the indication information.
  • the control unit may include:
  • a negotiation subunit configured to negotiate a codec of the service end
  • the adjustment subunit is used to adjust the link of the service end.
  • the switching device can also include:
  • the reply unit is configured to reply to the acceptance information when the preparation for the local exchange is successful, and the acceptance information is used to indicate acceptance and the local exchange has been initiated; otherwise, the reply does not accept the information, and the information is not accepted to indicate that the local exchange is not initiated.
  • the switching device in this embodiment can be set independently, or can be set in the BSS, and cooperates with the MSC to implement local exchange of the BSS.
  • Embodiment a switching device, see FIG. 6, includes:
  • the receiving unit 601 is configured to receive indication information for performing local exchange of the service end, where the indication information includes information about the service end;
  • the negotiating unit 602 is configured to negotiate, according to the information of the service end, a codec type of the service end;
  • the executing unit 603 is configured to determine whether to perform local exchange according to the result of the negotiation.
  • the execution unit 603 can include:
  • a first execution unit configured to accept and start the local exchange when the codec type of the service end is the same;
  • a second execution unit configured to: accept and start the local exchange when the codec type of the service end is compatible, and the codec of the service end can be converted;
  • a third execution unit configured to: when the codec type of the service end is different, and the codec of the service end cannot be converted, the local exchange is not started.
  • the switching device can also include:
  • a releasing unit configured to release a service channel established for the service end when the codec type of the service end is the same, or the codec type of the service end is compatible.
  • the device in this embodiment can be set independently, or can be set in the BSS, and cooperates with the MSC to implement local exchange of the BSS.

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Description

实现交换的方法及交换设备
本申请要求于 2007 年 11 月 9 日提交中国专利局、 申请号为 200710188125. K 发明名称为"实现交换的方法及交换设备 "的中国专利申请的 优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域, 特别涉及实现交换的方法及交换设备。
背景技术
移动交换技术发展越来越迅猛, 网络的覆盖也相应地不断扩张, 随着网络 扩张, 为了降低传输成本, 提出了本地交换的通信方式, 即在基站子系统支持 本地交换时,在同一个基站子系统覆盖区内, 不同用户之间的信息交换可以在 该基站子系统内部完成。
但是, 这种本地交换存在着以下问题:
由于语音业务通道数据不经过编解码器, 基站子系统不能对移动台 ( Mobile Station , MS )的信息进行编解码, 因此, 只能在两个编解码类型一 致的 MS之间实现本地交换。
本地交换在基站子系统内部实现,移动交换中心( Mobile Switching Centre , MSC )无法知道两个 MS之间的通话在基站子系统是否进行了本地交换。
发明内容 应用灵活。
本发明实施例提供了一种实现交换的方法, 该方法包括:
获取业务端的位置信息;
根据所述位置信息触发本地交换, 向接入网发送指示信息, 所述指示信息 用于指示所述接入网进行本地交换。
本发明实施例还提供了一种实现交换的方法, 该方法包括:
接收进行业务端本地交换的指示信息,所述指示信息中包含所述业务端的 信息;
才艮据所述业务端的信息协商所述业务端的编解码类型;
根据所述协商的结果确定是否进行本地交换。 本发明实施例还提供了一种交换设备, 该交换设备包括:
信息单元, 用于获取业务端的位置信息;
判断单元,用于根据所述信息单元获取的所述位置信息判断是否触发本地 交换;
指示单元, 用于所述判断单元判定触发本地交换时, 向接入网发送指示信 息, 所述指示信息用于指示所述接入网进行本地交换。
本发明还提供了一种交换设备, 该交换设备包括:
接收单元, 用于接收进行业务端本地交换的指示信息, 所述指示信息中包 含所述业务端的信息;
协商单元, 用于^ ^据所述业务端的信息协商所述业务端的编解码类型; 执行单元, 用于根据所述协商的结果确定是否进行本地交换。
背景技术中的本地交换由各基站子系统内部实现,各基站子系统可能是由 不同设备商提供, 根据其本地策略实现本地交换, 难以标准化。 采用本发明实 施例实现交换的方法及交换设备, 判断可以触发本地交换时, 向接入网发送指 示信息,指示接入网进行本地交换,将是否进行本地交换的控制功能从接入网 分离出来,对接入网的本地交换进行集中控制,使得本地交换不再依赖于接入 网的本地策略, 使得本地交换的应用更为灵活, 易于作为标准进行推广, 降低 了推广、 应用的成本。
附图说明
图 1是实现交换的方法实施例一的流程示意图;
图 2是实现交换的方法实施例二的流程示意图;
图 3是实现交换的方法实施例三的流程示意图;
图 4是一种交换设备实施例的结构示意图;
图 5是另一种交换设备实施例的结构示意图;
图 6是又一种交换设备实施例的结构示意图。
具体实施方式
实施例一, 一种实现交换的方法, 参见图 1, 该方法包括:
101、 获取业务端的接入网位置信息;
位置信息用于提供业务端在接入网内的位置, 位置信息可以是小区信息, 路由区信息, 位置区信息, IP地址等信息中的一种信息或多种信息。 下面以 小区信息作为位置信息为例进行描述。
业务包括语音业务或数据业务, 进一步的, 数据业务可以是图像业务, 传 真业务, 文本业务等业务中的一种或多种。
业务端是指实现业务的终端, 该终端可以包括是 MS, 固定终端或者多媒 体终端。
业务端根据业务类型不同, 数量也不同, 一般包括两个或两个以上, 当业 务涉及两个终端时, 例如语音通话、 传真等, 业务端为两个; 当业务涉及多个 终端时, 例如多方会议、 群发邮件、 群发短信等, 业务端可以为多个。
接入网是指为终端提供接入服务的网络, 例如 2G中的基站子系统(Base
Station Subsystem, BSS )或者 GSM/EDGE无线接入网 (GSM EDGE Radio Access Network, GERAN ), 或者 3G 中的 UMTS 陆地无线接入网 (UMTS Terrestrial Radio Access Network , UTRAN)等。
根据各业务端的相关信令获取该业务端的位置信息, 例如, 对于两个 MS 之间的语音通话业务,根据主叫 MS的呼叫请求过程或呼叫建立过程的信令携 带的信息获取主叫 MS的小区信息, 根据被叫 MS的寻呼响应消息获取被叫 MS的小区信息。 还可以直接根据业务端的请求消息获取相应业务端的小区信
102、 当根据位置信息判断需要触发本地交换时, 向接入网发送指示信息, 指示信息用于指示接入网进行本地交换。
当同一业务的各业务端都位于同一接入网的覆盖区内时,判断需要触发本 地交换, 否则判断无需触发本地交换。 同一接入网的覆盖区可以指接入网内同 一个控制器单元所控制的区域,也可以指不同控制器单元间所控制的区域,这 些控制器单元间可以建立信令和 /或业务链路。
可以直接向接入网发送指示信息,一般发送给接入网中的控制器单元,告 知接入网控制器单元(如: 基站控制器(Base Station Controller, BSC ) )准备 本地交换, 并将需要进行本地交换的业务端信息告知控制器单元; 也可以在向 接入网发送的消息中携带该指示信息, 例如, 对于语音通话业务, 可以在向接 入网发送的分配请求( Assignment Request ) 消息中携带指示信息。 指示信息可以包括能够标识需要本地交换的业务端的信息,可以包括全部 或者部分需要本地交换的业务端的信息,如终端标识 IMSI/TMSI, 电路识别码 ( Circuit Identification Code , CIC )等。
背景技术中的本地交换由^ 矣入网内部实现, 矣入网可能是由不同设备 商提供, 根据^ 矣入网的本地策略实现本地交换, 没有提供标准化的方法。 采 用本实施例实现交换的方法, 判断需要触发本地交换时, 向接入网发送指示信 息,指示接入网进行本地交换,将是否进行本地交换的控制功能从接入网分离 出来,对接入网的本地交换进行集中控制,使得本地交换不再依赖于接入网的 本地策略, 通过标准的接口信令, 使得本地交换的应用更为灵活, 易于作为标 准进行推广, 降低了推广、 应用的成本。
进一步的,接入网接收到指示信息后,可以进行业务端的编解码类型协商。 接入网内部知道各业务端的编解码类型以及支持的编解码类型。编解码类型协 商一般由接入网控制器单元执行, 如 BSC。 编解码对于同一个控制器单元所 控制的接入网区域, 不需要信令交互就可以完成协商;对于不同控制器单元间 所控制的接入网区域, 需要通过建立的链路进行信令交互以完成协商。
对业务端的编解码类型协商结果可以分为三种:
第一种、 当业务端的编解码类型相同时, 即业务端的编解码方式及速率相 同, 接入网控制器单元回复接受消息, 接受并启动本地交换, 之后的本地交换 可以不经过码变换器(Transcoder, TC )或速率适配单元( Transcoder & Rate Adaptation Unit, TRAU ), 直接在接入网内部环回, 从而可以减少 TC/TRAU 资源和接入网与核心网间的传输资源的配置, 降低成本。环回可以通过对接入 网内部交换芯片或交换模块进行配置,将业务数据的入口和出口都设置在接入 网内部。
第二种、 当业务端的编解码类型兼容时, 即业务端的编解码方式或速率不 相同, 但是可以通过 TC/TRAU进行编解码转换, 则接入网控制器单元回复接 受消息, 接受并启动本地交换, 之后的本地交换经过 TC/TRAU后在接入网内 部实现环回, 采用此种方式, 需要建立经过 TC/TRAU的链路资源。
第三种、当业务端的编解码类型不同,且 TC/TRAU不能进行编解码转换, 则回复表示不接受的消息, 表示不启动本地交换。 对于第一种和第二种结果, 当接入网接受本地交换后,释放与接入网之间 为业务端建立的地面链路 ( terrestrial channel ) 资源, 而与接入网之间的信令 链路可以保持, 从而节省与接入网之间的地面链路资源, 降低传输成本。 在接 入网接受本地交换之前,在接入网和核心网间可能已经为通话方中的一个或多 个业务端建立了一条或多条信令链路和地面链路,则当接入网接受本地交换之 后, 释放该地面链路资源。
以上的地面链路资源为本实施例中的业务通道,业务通道用于传输业务的 数据,与信令链路配合实现相应的业务。业务通道还可以为互联网协议( Internet Protocol , IP )链路、 异步传输模式 ( Asynchronous Transfer Mode , ATM ) 链路等。
释放与接入网之间的业务通道后,可以保存该业务通道的信息, 为后续操 作, 例如重新建立业务通道等提供操作参数, 从而提高后续操作的效率。
在本地交换前后,可能一直都未为一部分业务端分配业务通道,但需要为 这些业务端建立业务通道信息, 为后续操作, 例如启动本地交换时标识业务端 等提供操作参数。
在本地交换进行过程中, 可以为了其他功能的需要而中断本地交换, 以 GSM的合法监听为例, 当 MSC接收到监听中心的监听指示后,可以中断本地 交换, 向接入网发送解除指令, 指示接入网解除本地交换, 在解除本地交换并 恢复建立接入网与核心网间的地面链路资源后, MSC将业务数据复制转发给 监听中心。
采用本实施例实现交换的方法,可以在业务进行过程中,解除或恢复接入 网侧的本地交换, 提高本地交换应用的灵活性。
实施例二, 实施例一中实现交换的方法的功能可以独立设置,也可以集成 在 MSC中, 或者集成在其他的网络设备中, 在本实施例中, 实现控制本地交 换的方法的功能集成在 MSC中, 将实施例一实现交换的方法应用到语音通话 业务中,在 MSC获得将要通话的双方 MS的位置后判断是否可以启动 BSS侧 本地交换, 即判断是否可以启动接入网侧本地交换,参见图 2,具体流程如下: 在呼叫建立过程中, 在主叫侧完成呼叫建立 (Call Setup )流程后, MSC 将为主叫侧请求建立空口信道和 A接口地面链路资源, 在收到主叫侧的分配 完成( Assignment Complete ) 消息后, MSC寻呼被叫 MS。
201、 当 MSC收到被叫 MS的寻呼响应( Paging Response )消息, 获知被 叫 MS的小区信息, 如果通话双方都位于相同 BSS的覆盖范围, 则可以决定 触发接入网侧本地交换。
主叫 MS的小区位置可以在收到被叫 MS的寻呼响应之前获得,如在呼叫 建立过程中的层三信令( COMPLETE LAYER 3 INFORMATION消息)中携带 的小区信息获得。
对于决定是否触发接入网侧本地交换时,可以考虑接入网对本地交换的支 持能力。 接入网对本地交换能力情况可以在 A口信令上通知 MSC, 如信道请 求等。如果 MSC没有在 BSS发送来的 A口信令上获得接入网多本地交换的支 持信息, 按照配置, 可以默认 BSS不支持本地交换, 也可以默认 BSS支持本 地交换。
如果要触发接入网侧本地交换,则 MSC通过信令携带本地交换相关信息, 告知 BSC需要准备本地交换, 可以使用新的信令携带本地交换相关信息, 也 可以在原有的信令中携带本地交换相关信息, 如: 在为被叫 MS 的分配请求 ( Assignment Request ) 消息中的" Channel Type IE"中携带新的" Speech with Local Switching"指示值。
本实例中,在发送被叫 MS的寻呼消息之前,主叫 MS已经建立了 A口的 地面链路资源, 并且 MSC和 BSC可以使用电路识别码( Circuit Identification Code, CIC )来标识该地面链路资源。 MSC 需要将本地交换相关信息以及本 地交换涉及的业务端信息发送给 BSC, 如在分配请求消息中携带新增加的指 示, 将标识主叫地面链路资源的 CIC通知 BSC, 以告知 BSC本地交换的另一 个业务端点的标识,可以使用新的 Pairing Circuit Identity Code IE (格式与已有 的 Circuit Identity Code IE的一致)。
202、 BSS收到 Assignment Request消息, 如果 BSS能够支持本地交换, 进行本地交换的启动判断。 支持本地交换的 BSS需要配置 CIC和 MS间的对 应关系, 使得在收到被叫 MS的新的 Assignment Request消息时能够将呼叫双 方的 MS进行关联, 从而判断出启动本地交换的两个 MS。
首先进行编解码类型协商, 因为 BSS知道通话双方 MS的语音编解码类 型 ( Speech Codec Types )和支持的编解码列表 ( Supported Codec List ), 因此 可以在 BSS内部进行编解码协商。 协商结果分为三种:
第一种、 找到双方一致的编解码类型 ( Codec )。 BSS回复 MSC—条被叫 MS的 Assignment Complete 消息 , 该 Assignment Complete消息包含新的指示 信息, 通知 MSC接受本地交换且本地交换启动成功, 如可以使用本地交换启 动指示 ( Local Switching Indicator )。 在回复 Assignment Complete 消息之前, BSS需要进行本地交换准备,将内部为此次呼叫建立的链路进行调整,如对内 部交换芯片或交换单元进行重新配置 , 使得语音可以不经过 TC/TRAU直接环 回, 且不发送到接入网外;
Assignment Complete消息中包含的指示 Local Switching Indicator,有两种 取值, 一种标识当前本地交换被接受且建立成功, 如可以用非全零值; 另一种 代表当前本地交换不接受或建立失败,相应地可以用全零值。如果 Assignment Complete消息中未包含 Local Switching Indicator指示 ,表示本地交换不支持或 启动失败。
第二种、找到双方兼容的 Codec。 BSS同样回复 MSC包含 Local Switching
Indicator的 Assignment Complete 消息, 通知 MSC本地交换接受, 且指示本 次本地交换建立成功。 同样在回复 Assignment Complete 消息之前, BSS需要 进行本地交换准备,如将内部为此次呼叫建立的链路进行调整,如对内部交换 芯片或交换单元进行重新配置, 使得语音需要经过 TC/TRAU环回, 但不发送 到接入网外。
第三种、 编解码不兼容或 BSS不支持本地交换, 不能够启动本地交换。 BSS回复不带有 Local Switching Indicator或者携带本地交换不接受或建立失败 指示的 Assignment Complete 消息。 本次业务按照传统正常话音接续方式进行 处理。
如果 BSS不支持本地交换,将不进行本地交换启动判断,忽略含有" Speech with Local Switching"的分配请求消息。
为了更好地支持本地交换, Local Switching Indicator信元可以包含两部分 内容: 本地交换启动标识和本地交换模式, 定义如下:
本地交换启动标识可以取不同值以表示: 1、 编解码不兼容;
2、 编解码相同, 即通话双方使用完全一样的 codec, 包括全速率、 半速率 及 AMR编解码;
3、 编解码兼容, 即通话双方使用兼容的 codec。
在扩展应用的时候还可以取其他值。
本地交换模式可以取不同值以表示:
1、 未启动本地交换;
2、 BTS 内本地交换, 即在同一 BTS 内进行语音返回, 不需要经过 Abis 3、 BTS群内本地交换。 BTS群指的是一个或多个 BTS组成的集合, 在其 内部可以进行本地交换, 不需要经过 BSC;
4、 BSC内部本地交换, 即在同一 BSC内部进行语音返回。 BSC内部本 地交换涵盖了 BTS内本地交换和 BTS群内本地交换。
在扩展应用的时候还可以取其他值。
203、 在收到带有指示的 Assignment Complete 消息后, MSC判断 BSS已 经在本地对语音进行交换, 如果当前在 A 口上为通话双方中的任意一方建立 了地面链路资源, 需要进行释放, 但保留信令链路。 信令链路包括但不限于 SCCP连接。
释放过程可以由 MSC发起, 通过信令指示需要释放的地面链路, 如使用 上述 CIC进行标识的方法,将 CIC对应的地面链路释放,但不释放 CIC标识, 即需要为通话双方的 MS保留对应的 CIC。 因此 MSC和 BSC都需要维护 MS 和 CIC 的对应关系, 以用于本地交换解除和恢复, 并且释放该地面链路资源 使得能够被其他呼叫所使用。释放流程中需要增加释放的原因,指示是因为本 地交换引起的电路释放, 不影响信令链路和通话的正常进行。如可以使用阻塞 流程释放地面电路, 在阻塞消息(Block )中增加新的原因值以释放 A口资源, 完成后 BSC发送阻塞确认消息 (Block Acknowledge )给 MSC。
MSC可以使用 RESET CIRCUIT流程解除本地交换。 之后可以重新使用 Block流程进入本地交换状态, 并释放地面电路。
释放过程也可以由 BSC发起, 在启动本地交换成功后, 可以选择在发送 Assignment Complete 消息之前或之后, 发起释放流程。
实施例三, 相对实施例二, 本实施例在 MSC开始进行本地交换判断时, 未曾为主叫 MS或被叫 MS建立地面链路资源。 在 MSC获得将要通话的双方 MS的位置后判断是否可以启动 BSS侧本地交换,即判断是否可以启动接入网 侧本地交换, 参见图 3, 具体流程如下:
在呼叫建立过程中,在主叫侧完成呼叫建立流程后,在为主叫侧建立空口 和 A接口地面链路资源之前, MSC将寻呼被叫 MS。
301、 当 MSC收到被叫 MS的寻呼响应( Paging Response )消息, 获知被 叫 MS的小区信息, 就可以决定是否触发接入网侧本地交换。 如果通话双方都 位于相同 BSS的覆盖范围, 则可以决定触发接入网侧本地交换。
主叫 MS的小区位置可以在收到被叫 MS的寻呼响应之前获得,如在呼叫 建立过程中的层三信令( COMPLETE LAYER 3 INFORMATION消息)中携带 的小区信息获得。
本实例中,在发送被叫 MS的寻呼消息之前,还未为主叫 MS建立 A口的 地面链路资源, 触发本地交换的方法有以下两种情况:
1 ) MSC首先为主叫 MS建立 A口地面链路。 发送分配请求给 BSS请求 为主叫 MS建立空口和 A口传输, 在收到主叫 MS的 Assignment Complete 消 息后, 再触发本地交换;
2 ) MSC不为主叫 MS建立 A口地面链路,但需要为主叫 MS分配相应的 标识信息, 如 CIC, 使得能够在本地交换启动时进行标识主叫 MS。 主叫 MS 的标识信息分配完成后, MSC发送一条信令指示 BSS需要启动本地交换, 在 该信令中包含呼叫双方的 MS的标识, 如使用 TMSI或 IMSI进行标识。 该信 令可以扩展 Assignment Request消息或使用一条新的消息。
302、 BSS收到指示消息后, 如果 BSS能够支持本地交换, 则进行本地交 换的启动判断。 如果满足本地交换条件, BSS需要进行本地交换准备, 将内部 为此次呼叫建立的链路进行调整, 使得语音在本地环回, 不发送到接入网外, 并通知 MSC。
对于 301步骤中的触发情况 1 ), 启动方法同实施例二;
对于 301步骤中的触发情况 2 ), 在编解码类型协商成功后, 即找到相同 或兼容的编解码类型, 并完成本地交换准备后, 发送一条确认消息给 MSC, 告知本地交换启动成功。
如果 BSS不支持本地交换, 将不进行本地交换启动判断。
实施例四,相对实施例二和实施例三,本实施例中的接入网的覆盖区可以 包括同一 MSC下的不同 BSS或者不同 MSC下的不同 BSS。 例如, 在使用 IP 链路作为业务信道时, 本地交换可以在不同 BSS间进行。 以同一个 MSC下的 不同 BSS间为例, MSC开始进行本地交换判断时, 在 MSC获得将要通话的 所有 MS的位置后判断是否可以启动接入网侧本地交换:
301,、 当 MSC获取到呼叫涉及的所有 MS的位置, 判断是否触发本地交 换, 如果下述条件满足, 可以触发本地交换: 呼叫涉及的 MS所处的 BSS可 以互达, 例如 BSS间可以建立不经过核心网的直接通信的业务链路、 BSC间 可以建立不经过核心网的直接通信的业 路、 BTS间可以建立不经过核心网 的直接通信的业务链路。 为了能够满足本地交换的条件, BSS或 MSC尽量为 所有 MS协商相同或兼容的编解码类型。
涉及呼叫的 MS可以多于 2个。
302,、 MSC发送指示给各个 BSS, 启动本地交换。为了能够使得不同 BSS 间的呼叫能够实现不经过核心网直接进行语音数据的交换, 需要每一个 BSS 知道当前呼叫在其他 BSS的传输信息, 如 BSS或 MSC为本次呼叫所分配的 IP地址、 UDP端口号等, 这就需要 MSC在 BSS间传递本次呼叫的传输信息。 呼叫涉及的 BSS可以使用同一个呼叫标识用来标识该呼叫, 如 CIC等, 该呼 叫标识由 MSC或 BSS指定; 也可以使用不同的呼叫标识。
303,、 BSS收到指示消息后, 如果 BSS能够支持本地交换, 则进行本地 交换的启动判断。 如果满足本地交换条件, BSS需要进行本地交换准备, 例如 更改本次呼叫的目的 IP地址及 UDP端口号,使得能够将呼叫的语音数据不经 过核心网直接传输到另一个 BSS, 能够接收来自另一 BSS的语音数据; 如果 BSS不支持本地交换, 将不进行本地交换启动判断。 完成后, 此次呼叫的语音 数据直接在 BSS间传输, 不经过核心网。
如果呼叫涉及的 BSS处在不同 MSC下, 本地交换触发判断由各个 MSC 或其中一个 MSC进行, 当判断可以触发本地交换后, 启动本地交换。 可以通 过信令进行交互, 使得所涉及的所有 MSC能够统一认识本地交换是否启动。 通过在 MSC间传递信令, BSS间相互获得另一个 BSS的本次呼叫的传输信息。
采用上述实施例实现交换的方法,使得本地交换不再依赖于接入网的本地 策略, 并且可以实现同一 MSC下的不同 BSS或者不同 MSC下的不同 BSS进 行本地交换, 使得本地交换的应用更为灵活, 易于作为标准进行推广, 降低了 推广、 应用的成本。
实施例, 一种交换设备, 参见图 4, 包括:
信息单元 401 , 用于获取业务端的位置信息, 如小区信息;
判断单元 402, 用于根据位置信息判断是否可以触发本地交换;
指示单元 403,用于当判断需要触发本地交换时,向接入网发送指示信息, 指示信息用于指示接入网启动本地交换。
采用本实施例的交换设备, 判断可以触发本地交换时, 向接入网发送指示 信息,指示接入网启动本地交换,提供了对接入网的本地交换进行集中控制的 标准化方法,使得本地交换不再依赖接入网的本地策略,使得本地交换的应用 更为灵活, 易于推广。
判断单元可以包括:用于对正在进行同一业务的业务端进行判断是否可以 触发本地交换的模块。
指示单元可以包括: 用于在向接入网发送的信令(如: 分配请求消息)中 携带指示信息的模块。 指示单元还接收接入网的本地交换启动确认信令。
指示单元一般和接入网内的控制器单元进行信令交互,如 GSM中的 BSC,
UMTS中的 RNC。
该交换设备还可以包括:
链路单元, 用于建立与接入网之间的信令链路和 /或业务通道。
可以只建立与接入网之间的信令链路, 不建立与接入网之间的业务通道, 从而节省与接入网之间的业务通道资源, 降低传输成本。
该交换设备还可以包括:
释放单元, 用于释放与接入网之间的业务通道。
在接入网接受本地交换之前, 也可能已经与接入网之间建立了业务通道, 则当接入网接受本地交换之后, 可以释放与接入网之间的业务通道。 该交换设备还可以包括:
解除单元, 当需要解除本地交换时, 向接入网发送解除指令, 解除指令用 于指示接入网取消本地交换。 解除单元还接收从接入网回复的解除确认消息。
当业务进行过程中, 可以为了其他功能的需要, 中断本地交换, 例如, 对 于 GSM的合法监听, 当 MSC接收到监听中心的监听指示后, 可以中断本地 交换, 向接入网发送解除指令, 指示接入网解除本地交换, 在取消除本地交换 并恢复建立接入网与核心网间的地面链路资源后, MSC将业务数据复制转发 给监听中心。
采用本实施例的交换设备,可以在业务进行过程中,解除或恢复接入网侧 的本地交换, 扩展本地交换应用场景。
本实施例中的交换设备可以独立设置,也可以设置在 MSC中,实现对 BSS 本地交换的控制。
实施例, 一种交换设备, 参见图 5, 包括:
接收单元 501 , 用于接收进行业务端本地交换的指示信息;
控制单元 502, 用于根据指示信息, 准备本地交换。
其中, 控制单元可以包括:
协商子单元, 用于协商业务端的编解码;
调整子单元, 用于调整业务端的链路。
该交换设备还可以包括:
回复单元, 用于当准备本地交换成功时, 回复接受信息, 接受信息用于表 示接受并已启动本地交换; 否则, 回复不接受信息, 不接受信息用于表示不启 动本地交换。
本实施例中的交换设备可以独立设置, 也可以设置在 BSS中, 与 MSC相 配合, 实现 BSS的本地交换。
实施例, 一种交换设备, 参见图 6, 包括:
接收单元 601, 用于接收进行业务端本地交换的指示信息, 所述指示信息 中包含所述业务端的信息;
协商单元 602 , 用于^^据所述业务端的信息协商所述业务端的编解码类 型; 执行单元 603 , 用于根据所述协商的结果确定是否进行本地交换。
其中, 执行单元 603可以包括:
第一执行单元, 用于当所述业务端的编解码类型相同时,接受并启动所述 本地交换; 和 /或
第二执行单元, 用于当所述业务端的编解码类型兼容,且所述业务端的编 解码能够转换时, 接受并启动所述本地交换; 和 /或
第三执行单元, 用于当所述业务端的编解码类型不同,且所述业务端的编 解码不能转换时, 不启动所述本地交换。
该交换设备还可以包括:
释放单元, 用于当所述业务端的编解码类型相同,或所述业务端的编解码 类型兼容时, 释放为所述业务端建立的业务通道。
本实施例中的设备可以独立设置,也可以设置在 BSS中,与 MSC相配合, 实现 BSS的本地交换。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到本发明 可借助软件加必需的硬件平台的方式来实现, 当然也可以全部通过硬件来实 施, 但很多情况下前者是更佳的实施方式。 基于这样的理解, 本发明的技术方 案对背景技术做出贡献的全部或者部分可以以软件产品的形式体现出来,该计 算机软件产品可以存储在存储介质中, 如 ROM/RAM、磁碟、 光盘等, 包括若 干指令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备 以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通 技术人员来说, 在不脱离本发明原理的前提下, 还可以作出若干改进和润饰, 这些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求
1、 一种实现交换的方法, 其特征在于, 该方法包括:
获取业务端的位置信息;
根据所述位置信息触发本地交换, 向接入网发送指示信息, 所述指示信息 用于指示所述接入网进行本地交换。
2、 根据权利要求 1所述的方法, 其特征在于, 所述根据位置信息触发本 地交换包括:
当所述位置信息指示同一业务的各业务端位于同一接入网的覆盖区内时, 触发本地交换。
3、 根据权利要求 1所述的方法, 其特征在于, 所述获取业务端的位置信 息之前, 所述方法还包括: 建立与所述接入网之间的信令链路和 /或业务通道。
4、 根据权利要求 1所述的方法, 其特征在于, 还包括:
接收接入网根据所述业务端的编解码类型协商结果做出的接受本地交换 的通知后, 释放为所述业务端建立的业务通道。
5、 根据权利要求 1所述的方法, 其特征在于, 该方法还包括:
在本地交换进行过程中, 当需要解除本地交换时, 向所述接入网发送解除 指令, 所述解除指令用于指示所述接入网取消本地交换。
6、 一种实现交换的方法, 其特征在于, 该方法包括:
接收进行业务端本地交换的指示信息,所述指示信息中包含所述业务端的 信息;
才艮据所述业务端的信息协商所述业务端的编解码类型;
根据所述协商的结果确定是否进行本地交换。
7、 根据权利要求 6所述的方法, 其特征在于, 所述根据协商结果确定是 否启动本地交换包括:
当所述业务端的编解码类型相同时, 接受并启动所述本地交换; 或者 当所述业务端的编解码类型兼容时, 接受并启动所述本地交换; 或者 当所述业务端的编解码类型不同, 且所述业务端的编解码不能转换时, 不 启动所述本地交换。
8、 根据权利要求 7所述的方法, 其特征在于, 还包括: 当所述业务端的编解码类型相同,或所述业务端的编解码类型兼容时,释 放为所述业务端建立的业务通道。
9、 一种交换设备, 其特征在于, 该设备包括:
信息单元, 用于获取业务端的位置信息;
判断单元,用于根据所述信息单元获取的所述位置信息判断是否触发本地 交换;
指示单元, 用于当所述判断单元判定触发本地交换时, 向接入网发送指示 信息, 所述指示信息用于指示所述接入网进行本地交换。
10、 根据权利要求 9所述的交换设备, 其特征在于, 所述判断单元包括: 用于当所述位置信息指示同一业务的各业务端都位于同一接入网的覆盖区内 时, 触发本地交换的模块。
11、 根据权利要求 9所述的交换设备, 其特征在于, 该设备还包括: 链路 单元, 用于所述信息单元获取业务端的位置信息前, 建立与所述接入网之间的 信令链路和 /或业务通道。
12、 根据权利要求 9所述的交换设备, 其特征在于, 该设备还包括: 解除单元, 用于在本地交换进行过程中, 当需要解除本地交换时, 向所述 接入网发送解除指令, 所述解除指令用于指示所述接入网取消本地交换。
13、 根据权利要求 9所述的交换设备, 其特征在于, 该设备还包括: 释放单元, 用于在接入网接受本地交换之后,释放为所述业务端建立的业 务通道。
14、 一种交换设备, 其特征在于, 包括:
接收单元, 用于接收进行业务端本地交换的指示信息, 所述指示信息中包 含所述业务端的信息;
协商单元, 用于^^据所述业务端的信息协商所述业务端的编解码类型; 执行单元, 用于根据所述协商的结果确定是否进行本地交换。
15、根据权利要求 14所述的交换设备, 其特征在于, 所述执行单元包括: 第一执行单元, 用于当所述业务端的编解码类型相同时,接受并启动所述 本地交换; 和 /或
第二执行单元, 用于当所述业务端的编解码类型兼容时,接受并启动所述 本地交换; 和 /或
第三执行单元, 用于当所述业务端的编解码类型不同,且所述业务端的编 解码不能转换时, 不启动所述本地交换。
16、 根据权利要求 15所述的交换设备, 其特征在于, 还包括: 释放单元, 用于当所述业务端的编解码类型相同,或所述业务端的编解码 类型兼容时, 释放为所述业务端建立的业务通道。
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CN101932053B (zh) * 2009-06-25 2013-09-11 华为技术有限公司 建立本地交换的方法、装置和通信系统
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