WO2008089675A1 - Procédé, système, commutateur et point de commande de service pour mettre en oeuvre un renvoi d'appel - Google Patents

Procédé, système, commutateur et point de commande de service pour mettre en oeuvre un renvoi d'appel Download PDF

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Publication number
WO2008089675A1
WO2008089675A1 PCT/CN2008/070085 CN2008070085W WO2008089675A1 WO 2008089675 A1 WO2008089675 A1 WO 2008089675A1 CN 2008070085 W CN2008070085 W CN 2008070085W WO 2008089675 A1 WO2008089675 A1 WO 2008089675A1
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WO
WIPO (PCT)
Prior art keywords
call
called party
party
calling
called
Prior art date
Application number
PCT/CN2008/070085
Other languages
English (en)
French (fr)
Inventor
Qian Yu
Shi Miao
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.
Priority to EP08706544A priority Critical patent/EP2046008A4/en
Publication of WO2008089675A1 publication Critical patent/WO2008089675A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/54—Arrangements for diverting calls for one subscriber to another predetermined subscriber
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/07—Split billing, i.e. both A-party and B-party charged for the communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/08—Metering calls to called party, i.e. B-party charged for the communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/09—Third party charged communications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0029—Provisions for intelligent networking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/62—Called party billing, e.g. reverse billing, freephone, collect call, 0800 or 0900
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/64—Split billing, sharing the cost of calls, e.g. between calling and called parties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/66—Third party billing, i.e. third party can also be the predetermined telephone line of the caller if he is calling from another telephone set
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
    • H04M3/53—Centralised arrangements for recording incoming messages, i.e. mailbox systems
    • H04M3/533—Voice mail systems
    • H04M3/53366—Message disposing or creating aspects
    • H04M3/53383—Message registering commands or announcements; Greetings

Definitions

  • the present invention relates to the field of communication network technologies, and in particular, to an intelligent network technology, and in particular, to a call forwarding implementation method, a call forwarding service processing system, a switching device thereof, and a service control point. Background technique
  • the call forwarding service is currently a relatively common service, and the call forwarding service usually includes three types: unconditional forward, no answer forward, and busy forward.
  • the implementation principle of the call forwarding service means that the user transfers the call to one number to another number in some special cases, for example, when the user's home phone calls for a long time, the call is transferred to the user's mobile phone. Answering is performed to achieve call forwarding.
  • Call forwarding occurs on the called side, which is transparent to the calling side, that is, the calling user still thinks that the called user is answering based on the number of the call, and the charging system on the network side charges the calling user. It is also charged based on the number actually called by the calling user, and the additional call forwarding fee needs to be charged for the called user. For example, when user B goes abroad, the domestic communication is not interrupted, and the new number is usually purchased at the current time. After user B customizes the call forwarding service, the call to the domestic number can be transferred to the foreign number.
  • the calling user usually does not know that the user B is answered by using the foreign number, and the charging system on the network side only performs the calling of the calling party to the domestic number of the user B.
  • Billing, and the communication fee for a domestic number call to a foreign number is usually borne by the called user B.
  • the embodiment of the invention provides a method for implementing call forwarding, so as to implement the communication cost of the forwarded call by the calling user, and expand the flexibility of the call forwarding service.
  • a method for implementing call forwarding provided by the present invention includes:
  • the called party When the first called party has a call forwarding, the called party notifies the calling party of the information of the called call forwarding;
  • the calling side After receiving the information, the calling side connects the call to the second called party after forwarding.
  • the invention provides a call forwarding service processing system, which includes a called side switching device, a calling side switching device and a charging device.
  • the called side switching device notifies the calling side switching device of the information of the called call forwarding in the case that the first called party has a call forwarding;
  • the calling side switching device connects the call to the second called party after forwarding according to the received information.
  • Another call forwarding service processing system includes a called side switching device, a calling side switching device, and a calling side charging device.
  • the called side switching device is configured to notify the calling side charging device of the message that the called party has forwarded the call when the called party forwards the call;
  • the charging device is configured to: when receiving the message that the call is forwarded by the called party, instruct the calling side switching device to connect the call to the called party after the forwarding, and after the calling side switching device connects the call to the forwarding
  • the calling party performs charging based on the communication process after forwarding
  • the calling side switching device is configured to connect the call to the called party after forwarding according to the indication of the calling side charging device.
  • the invention also provides a switching device, comprising:
  • a message notification unit configured to notify a service control point to which the caller belongs when the call forwarding of the called party is known to be connected;
  • the connection unit is configured to: when receiving the indication of the called party that is sent by the service control point of the calling party to the forwarded call, the call is connected to the called party after the forwarding.
  • the switching device further comprises:
  • the message reporting unit is configured to: when the calling call that is controlled by the switching device is called, if the notification message of the call forwarding is sent by the called device to which the called party belongs, the message is sent to the caller The service control point to which the caller belongs.
  • a service control point provided by the present invention includes: a connection instructing unit, configured to: according to the received call forwarding message of the called party, instructing the switching device to which the calling party belongs to connect the call to the called party after forwarding;
  • the charging unit is configured to charge the calling party based on the forwarded communication process.
  • the invention also provides a charging method, comprising:
  • the called party When the first called party has a call forwarding, the called party notifies the calling party of the information of the called call forwarding;
  • the calling side After receiving the information, the calling side connects the call to the second called party after forwarding; and charges the communication process of the calling party to the second called party.
  • the forwarding message is notified to the communication control device where the calling user is located, so that the communication control device where the calling user is located is
  • the calling user performs charging based on the communication process of the called party after forwarding, thereby realizing the call forwarding service in the case where the calling user agrees to bear and communicate the communication fee of the called user after forwarding. Therefore, in the call forwarding service, the calling user bears the communication fee of the called forward, further expands the flexibility of the call forwarding service, and enhances the transparency of the call forwarding process to the calling user.
  • FIG. 1 is a schematic diagram of an intelligent network network architecture implemented by the present invention
  • FIG. 2 is a flowchart of processing according to a first embodiment of the present invention
  • FIG. 3 is a flowchart of processing according to a second embodiment of the present invention.
  • FIG. 4 is a block diagram showing the structure of an embodiment of a forwarding service processing system of the present invention.
  • FIG. 5 is a block diagram showing the structure of a first embodiment of a switching device according to the present invention.
  • FIG. 6 is a block diagram showing the structure of a second embodiment of a switching device according to the present invention.
  • FIG. 7 is a block diagram showing the structure of an embodiment of an SCP according to the present invention. detailed description
  • the idea of the technical solution of the present invention is that, in the process of the calling user calling the called user, if the called user has a call forwarding, the called party notifies the calling party of the forwarding information, and the calling party further connects the call to the caller. The called party after forwarding, and communicates with the calling user based on the callee after forwarding The process is charged.
  • FIG. 1 it is a schematic diagram of an intelligent network network architecture implemented by the present invention, wherein a gsmSCF is a core part of a mobile intelligent network, and generally includes a service control point (SCP), on which a service logic and a user are loaded. Data; gsmSSF cooperates with the MSC to handle the connection processing of the call.
  • SCP service control point
  • gsmSSF cooperates with the MSC to handle the connection processing of the call.
  • the MSC/SSP the SSP is in the gsmSSF part
  • IDP Initial Detection Point
  • the call process will be controlled by the SCP.
  • the SCP After the call is triggered to the SCP, the SCP starts the intelligent service logic, performs basic call processing (such as analyzing the calling and called numbers, etc.), and finds the corresponding user data for call authentication processing, and determines the validity of the user account. After the call is valid, the MSC/SSP is required to connect to the call and charge the user. Finally, when the user hangs up, the control process of the SCP ends, thereby completing a call control.
  • basic call processing such as analyzing the calling and called numbers, etc.
  • FIG. 2 it is a processing flowchart of the first embodiment of the present invention.
  • This embodiment can realize that when user A dials a call to the directory station, and the directory checker finds the phone number desired by user A, it can directly notify
  • the network switching device transfers the call of the user A to the queried telephone number, and enables the charging device on the network side to directly charge the user A based on the process of communicating with the queried telephone number.
  • the specific processing procedure on the network side is as follows:
  • Step 1 When user A initiates a call to the directory, the MSCa/SSP of the network where the A user is located reports the IDP message to the SCP of the network where the A user is located.
  • Step 2 After the SCP authenticates the user A, the SCP sends a connection (CONNECT) message to the SCP.
  • CONNECT connection
  • MSCa/SSP to instruct MSCa/SSP to connect User A's call to the network where the directory is located.
  • Step 3 The MSCa/SSP sends an initial address message (IAM) to the MSCb/SSP to connect the call to the directory station, where the sent IAM message carries the mobile subscriber roaming number (MSRN, Mobile Station Roaming Number) of the user A;
  • IAM initial address message
  • Step 4 The MSCb/SSP feeds back a response message (ANM) to the MSCa/SSP, so as to connect the call between the user A and the directory station;
  • NAM response message
  • Step 5 The directory station makes a call with the user A, asks the user A for the phone number that the user wants to query, and finds the corresponding phone number according to the needs of the user A, and then asks the user A to No need to check the number directly to transfer the call to the queried phone number;
  • Step 6 If the user A requests the directory to transfer the call directly to the found phone number, the user is notified of the MSCa/SSP of the network where the user A is located according to a predetermined protocol, and the notification message carries the found phone number. C, to inform the MSCa / SSP to transfer the call to the found phone number C;
  • Step 7 After receiving the notification message sent by the directory station, the MSCa/SSP sends a BCSM event report message (ERB, Event Report BCSM) to the SCP of the network where the user A is located, to notify the SCP that the called number has been forwarded.
  • ERB Event Report BCSM
  • the ERB message carries the forwarded telephone number C (ie, the telephone number queried by the directory);
  • Step 8 9. The SCP learns that the called number has been forwarded to the number according to the received ERB message.
  • the user A is budgeted according to the communication rate of the call from the user A to the phone number C, and sends a CONNECT message to the MSCa/SSP according to the budget result, instructing the MSCa/SSP to continue the call of the user A to the forward.
  • the AC (Application Charging) message is sent to the MSCa/SSP to initiate charging for the user A to communicate with the forwarded telephone number C.
  • the SCP does not support the user in the budget result.
  • the RealeaseCall message can be sent directly to the MSCa/SSP to indicate that the MSCa/SSP does not allow the call of User A to be directly connected to the forwarded telephone number C;
  • Step 10 The MSCa/SSP sends an initial address message (IAM) according to the MSCc/SSP where the number C forwarded by the SCP is forwarded to connect the call to the number C, where the sent IAM message carries the user A.
  • IAM initial address message
  • Step 11 The MSCc/SSP feeds back a response message (ANM) to the MSCa/SSP, thereby connecting the call between the user A and the found phone number C;
  • NAM response message
  • Step 12 User A and the called party using the telephone number C make a call, and the SCP performs charging processing on the user A according to the call rate of A to C;
  • Step 13 At the end of the call, the MSCa/SSP reports the charging report request message to the SCP.
  • Step 14 After receiving the ACR message, the SCP performs a fee settlement process on the user A, and issues a bill to deliver a RealeaseCall (RC) message to the MSCa/SSP to instruct the MSCa/SSP to release the call processing.
  • RC RealeaseCall
  • FIG. 3 it is a processing flowchart of the second embodiment of the present invention.
  • the calling user can be prompted to call the called party. If you are going abroad, you are willing to forward the call to the foreign number of the called user to make a call, and the caller will bear the communication fee to the foreign number of the called party.
  • the specific implementation process is as follows:
  • Step a when user A initiates a call to call the called user, the network where the A user is located
  • the MSC/SSP reports the IDP message to the SCP of the network where the A user is located.
  • Step b After the SCP authenticates the user A, the SCP sends an AC message to the MSCa/SSP to initiate charging processing for the user A.
  • Step c the SCP sends a connection (CONNECT) message to the MSCa/SSP to instruct the MSCa/SSP to connect the call of the user A to the MSCb/SSP of the network where the called user is located;
  • CONNECT connection
  • Step d the MSCa/SSP sends an IAM message to the MSCb/SSP to connect the call to the called user, where the sent IAM message carries the MSRN number of the user A;
  • Steps e, f because the called user goes abroad, he has purchased a new local number abroad, and has handled the call forwarding service in the country, and all the calls on the domestic number are transferred to the local number purchased abroad.
  • the MSCb/SSP receives the IAM message, it finds that the called user has customized the call forwarding service, and then the called forwarded message and the forwarded called number are called according to a contract agreement.
  • C that is, the local number purchased by the called user abroad
  • Step g After receiving the notification message sent by the MSCb/SSP, the MSCa/SSP sends an ERB message to the SCP of the network where the user A is located, to notify the SCP that the called number has been forwarded, and the ERB message carries the forwarding.
  • the phone number C After the phone number C;
  • Step h the SCP, according to the received ERB message, knows that the called number has been forwarded to the number C, and then broadcasts a special prompt tone to the calling user A through the PA message to prompt the user A that the called number has been forwarded.
  • the user A can be promptly prompted to change the call cost, and further can also broadcast the call rate to be applied to the user A, and then provide the selection to the user A;
  • Step i, j after user A hears the voice prompt, if he decides that he is willing to continue talking with the called user after forwarding, he may not need to use any action to indicate that the communication continues, if the user disagrees and is forwarded after being forwarded If you want to continue communication, you can use the direct hang up, or enter a menu prompt to tell the SCP to interrupt the communication. The SCP chooses to continue the communication when the user A chooses to continue the communication.
  • the communication rate of the user A to the telephone number C is budgeted, and a CONNECT message is sent to the MSCa/SSP according to the budget result, to instruct the MSCa/SSP to connect the call of the user A to the number C after the forwarding, and to the MSCa/
  • the SSP sends an AC (Apply Charging) message to initiate charging for the user A to communicate with the forwarded telephone number C.
  • the SCP does not support the user A and the forwarded number C in the budget result.
  • the RealeaseCall message may be sent directly to the MSCa/SSP to indicate that the MSCa/SSP does not allow the call of the user A to be directly connected to the forwarded telephone number C;
  • Step q The MSCa/SSP sends an IAM message to the MSCc/SSP where the forwarded number C is forwarded according to the instruction sent by the SCP to connect the call to the number C, where the sent IAM message carries the MSRN number of the user A;
  • Step m the MSCc/SSP feeds back the ANM message to the MSCa/SSP, thereby connecting the call between the user A and the called party using the foreign number C;
  • Step n user A and the called party using the telephone number C make a call, and the SCP performs charging processing on the user A according to the call rate of A to C;
  • Step r the MSCa/SSP reports the ACR message to the SCP at the end of the call;
  • Step s after receiving the ACR message, the SCP performs fee settlement processing on the call of the user A, and issues a bill, and finally sends a RealeaseCall (RC) message to the MSCa/SSP to instruct the MSCa/SSP to release the call processing.
  • RC RealeaseCall
  • the MSCa/SSP can use the ERB message to report the call to the SCP, and can also use the IDP message and the ACR message.
  • the extension unit is sent to report the forwarding message to the SCP, and the implementation principle is the same as the implementation process of using the REB message, and no further description is given here.
  • the MSC/SSP where the call is forwarded before the call is forwarded to the MSC/SSP where the calling user is located, and then the MSC/SSP where the calling user is located.
  • the SSP reports to the SCP that the call has been forwarded by the ERB message, IDP message or ACR message.
  • the MSC/SSP where the call is forwarded may notify the called party that the call forwarding occurs by the ERB message, the IDP message or the ACR message directly to the SCP where the calling user is located.
  • the SCP where the calling user is located cannot determine the location of the called party before the call is forwarded because the MSC/SSP where the called party forwarded notified the calling party's SCP.
  • the MSC/SSP informs the call of which call is in the end, so it is necessary to pass a call ID in the ERB message, IDP message or ACR message, so that the calling party's SCP knows which call is notified by the calling party, so that the SCP can find the call. Go to the original call related information.
  • FIG. 4 it is a structural block diagram of an embodiment of a forwarding service processing system according to the present invention, wherein the called side switching device 10 is configured to perform call forwarding when the called party has a call forwarding.
  • the message is notified to the calling side switching device 20, and the called side switching device 10 can pre-agreed a protocol with the calling side switching device 20 to send the called party call forwarding to the calling side switching device 20 through the agreement protocol.
  • the message of the calling side switching device 20 is used to report the received call forwarding of the called party to the calling side charging device 30, and connect the call to the front according to the instruction of the calling side charging device 30.
  • the called party wherein the calling side switching device 20 can report the received message to the calling side charging device 30 through the extended BCSM event report message (ERB), IDP message or ACR message;
  • the device 30 is configured to instruct the calling side switching device 20 to connect the call to the called party after forwarding, and perform charging processing on the calling party based on the forwarded communication process, and further, the calling side charging device 30 can When the calling party agrees and forwards the called party communication, the calling side switching device 20 is instructed to connect the call to the called party after the forwarding, and performs charging processing on the calling party based on the forwarded communication process.
  • the called side switching device 10 is configured to notify the calling side charging device 30 of the called party forward charging device in the case that the called party forwards the call, wherein the called side switching device 10 can be extended.
  • the ERB message, the IDP message, the ACR message, and the like are reported to the calling side charging device 30, and the calling side charging device 30 is configured to instruct the calling side switching device 20 to connect the call to the front.
  • the transferred called party, and after the calling side switching device 20 connects the call to the called party after the forwarding, performs charging processing on the calling party based on the forwarded communication process, and further calls the calling side charging device 30.
  • the caller-side switching device 20 may be instructed to connect the call to the called party after the forward call, and the caller-side switching device 20 connects the call to the forwarded call.
  • the charging process is performed on the calling party based on the forwarded communication process; the calling side switching device 20 is configured to connect the call to the forwarded call according to the connection instruction of the calling side charging device 30.
  • the switching device in the above system is usually the MSC/SSP functional part, and the function of the charging device is usually completed by the SCP.
  • FIG. 5 it is a structural block diagram of a first embodiment of a switching device according to the present invention, wherein a message notification unit 110 is configured to: when a call forwarding is initiated for a called party that is ready to connect, a call forwarding event is generated. Notifying the switching device to which the calling party belongs; the message reporting unit 120 is configured to notify the called party that the called party belongs to the calling device when the called party called by the switching device is called The message is reported to the SCP to which the calling party belongs, and the message reporting unit 120 may report the call forwarding call to the SCP to which the calling party belongs by using the extended ERB message, the IDP message, or the ACR message; 130.
  • the call is connected to the called party after forwarding.
  • FIG. 6 it is a block diagram of a second embodiment of the switching device of the present invention, wherein the message notification unit 210 is configured to: when the call forwarding for the called party is ready to be connected, the called call forwarding message is generated. Notifying the SCP to which the caller belongs, the message notification unit 210 may report the call forwarding call to the SCP to which the caller belongs by using the extended ERB message, the IDP message, or the ACR message; the connection unit 220 is configured to receive the SCP. When the call sent by the SCP to which the caller belongs is connected to the callee's connection indication after the forward call, the call is connected to the called party after the forward call.
  • the message notification unit 210 is configured to: when the call forwarding for the called party is ready to be connected, the called call forwarding message is generated. Notifying the SCP to which the caller belongs, the message notification unit 210 may report the call forwarding call to the SCP to which the caller belongs by using the extended ERB message, the IDP message, or
  • FIG. 7 it is a structural block diagram of an embodiment of an SCP according to the present invention, wherein a prompting unit 310 is configured to prompt the calling party to agree and forward the called party according to the received call forwarding message of the called party.
  • the communication indication unit 320 is configured to: when the calling party agrees to forward and forward the called party communication, instruct the switching device to which the calling party belongs to connect the call to the forwarded call; the charging unit 330 is configured to Calling is based on the communication process after forwarding.
  • the technical solution of the present invention cooperates with the MSC and the SCP in the network to notify the called user of the calling user of the call forwarding when the called user calls the call forward, and the calling user is notified by the calling user.
  • the SCP is located to charge the calling user based on the communication process of the called party after forwarding, thereby realizing the call forwarding in the case that the calling user agrees to bear the communication fee of the called user after the forwarding.
  • the service in turn, expands the flexibility of the call forwarding service and enhances the transparency of the call forwarding process to the calling user.
  • signaling for interaction between devices in the network is extended based on standard signaling, and thus compatibility with existing networks. Better. The spirit and scope of the invention. Thus, it is intended that the present invention covers such modifications and variations as the modifications and variations of the invention are within the scope of the appended claims and their equivalents.

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

Description

呼叫前转实现方法、 系统及其交换设备和业务控制点 本申请要求于 2007 年 01 月 23 日提交中国专利局、 申请号为 200710073027.3、 发明名称为"呼叫前转实现方法、 系统及其交换设备和业 务控制点"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
本发明涉及通信网络技术领域， 尤其涉及智能网技术， 具体地说， 涉 及一种呼叫前转的实现方法、 呼叫前转业务处理系统及其交换设备和业务 控制点。 背景技术
在智能网 （IN, Intelligence Network ) 系统中， 呼叫前转业务是目前比 较常见的业务， 呼叫前转业务通常包括无条件前转、 无应答前转和遇忙前 转三种类型。 呼叫前转业务的实现原理是指用户在某些特殊情况下， 将呼 叫到一个号码的呼叫转移到另外一个号码上去接听， 如在用户家里电话久 叫无应答时将呼叫转移到用户的手机上进行接听， 从而实现呼叫前转。
被叫侧发生呼叫前转， 对于主叫侧而言是透明的， 即主叫用户仍以为 被叫用户正在基于自身呼叫的号码进行接听， 而网络侧的计费系统对主叫 用户的计费也是基于主叫用户实际呼叫的号码进行计费的， 额外的呼叫前 转费用需要针对被叫用户进行计费。 例如用户 B 出国时为不中断国内的通 信， 通常会在当前地购买新的号码， 这样在用户 B定制了呼叫前转业务后， 就可以实现将呼叫到国内号码的呼叫转移到国外号码上接听， 针对这种情 况， 目前在现有技术中主叫用户通常是不知道用户 B是使用国外号码进行 接听的， 并且网络侧的计费系统也是仅仅对主叫用户呼叫到用户 B的国内 号码进行计费， 而由国内号码呼转到国外号码的通信费用通常是由被叫用 户 B来承担的。 发明内容
本发明实施例提供一种呼叫前转的实现方法， 以实现由主叫用户来承 担被叫前转的通信费用， 扩展呼叫前转业务的灵活性。 本发明提供的一种呼叫前转的实现方法， 包括：
当第一被叫发生呼叫前转， 被叫侧将被叫发生呼叫前转的信息通知给 主叫侧；
主叫侧接收到所述信息后， 将呼叫接续到前转后的第二被叫。
本发明提供的一种呼叫前转业务处理系统， 包括被叫侧交换设备、 主 叫侧交换设备和计费设备，
被叫侧交换设备， 在第一被叫发生呼叫前转的情况下， 将被叫发生呼 叫前转的信息通知给主叫侧交换设备；
主叫侧交换设备， 根据接收到的所述信息将呼叫接续到前转后的第二 被叫。
本发明提供的另一种呼叫前转业务处理系统， 包括被叫侧交换设备、 主叫侧交换设备和主叫侧计费设备，
被叫侧交换设备， 用于在被叫发生呼叫前转的情况下， 将被叫发生呼 叫前转的消息通知给主叫侧计费设备；
计费设备， 用于在接收到被叫发生呼叫前转的消息时， 指示主叫侧交 换设备将呼叫接续到前转后的被叫， 并在主叫侧交换设备将呼叫接续到前 转后的被叫时， 对主叫基于前转后的通信过程进行计费；
主叫侧交换设备， 用于根据主叫侧计费设备的指示将呼叫接续到前转 后的被叫。
本发明还提供一种交换设备， 包括：
消息通知单元， 用于在获知准备接续的被叫发生呼叫前转时， 将被叫 发生呼叫前转的消息通知给主叫所属的业务控制点；
接续单元， 用于在接收到主叫所属业务控制点下发的将呼叫接续到前 转后的被叫的指示时， 将呼叫接续到前转后的被叫。
更适宜地， 该交换设备还包括：
消息上报单元， 用于在交换设备所管辖的主叫呼叫被叫时， 若接收到 该被叫所属的交换设备发来的被叫发生呼叫前转的通知消息， 则将该消息 上才艮给主叫所属的业务控制点。
本发明提供的一种业务控制点， 包括： 接续指示单元， 用于根据接收到的被叫发生呼叫前转的消息， 指示主 叫所属的交换设备将呼叫接续到前转后的被叫；
计费单元， 用于对主叫基于前转后的通信过程进行计费。
本发明还提供一种计费方法， 包括：
当第一被叫发生呼叫前转， 被叫侧将被叫发生呼叫前转的信息通知给 主叫侧；
主叫侧接收到所述信息后， 将呼叫接续到前转后的第二被叫； 对主叫到所述第二被叫的通信过程进行计费。
本发明提供的技术方案中， 在主叫用户呼叫的被叫用户发生呼叫前转 时， 将前转消息通知给主叫用户所在的通信控制装置， 以由主叫用户所在 的通信控制装置对主叫用户基于和前转后的被叫的通信过程进行计费， 从 而实现在主叫用户同意承担和前转后的被叫用户的通信费用的情况下， 实 现呼叫前转业务。 从而实现了在呼叫前转业务中由主叫用户来承担被叫前 转的通信费用， 进一步扩展了呼叫前转业务的灵活性， 增强了呼叫前转过 程对主叫用户的透明性。 附图说明
下面将结合各个附图对本发明的具体实施过程及其具体能够达到的有 益效果进行详细的阐述， 在各附图中：
图 1为本发明所实施在的智能网网络架构示意图；
图 2为本发明第一实施例的处理流程图；
图 3为本发明第二实施例的处理流程图；
图 4为本发明前转业务处理系统的实施例组成结构框图；
图 5为本发明交换设备的第一实施例组成结构框图；
图 6为本发明交换设备的第二实施例组成结构框图；
图 7为本发明 SCP的实施例组成结构框图。 具体实施方式
本发明技术方案的思想是在主叫用户呼叫被叫用户过程中， 若被叫用 户发生呼叫前转， 则被叫侧将该前转信息通知给主叫侧， 主叫侧进而将呼 叫接续到前转后的被叫， 并对主叫用户基于和前转后的被叫进行通信的过 程进行计费处理。
如图 1所示，为本发明所实施在的智能网网络架构示意图，其中 gsmSCF 是移动智能网的核心部分， 通常包括业务控制点 （SCP , Service Control Point )，其上加载有业务逻辑和用户数据； gsmSSF与 MSC配合负责呼叫的 接续处理。 当一个移动智能网用户发起呼叫或被呼叫时， MSC/SSP ( SSP 处于 gsmSSF部分中） 向 SCP上 ^艮初始检测点 （ IDP, Initinal Detect Point) 信令， 以触发 SCP上的移动智能业务， 其呼叫过程将由 SCP进行控制。 呼 叫触发到 SCP后， SCP启动智能业务逻辑， 进行基本的呼叫处理（如分析 出主被叫号码等）， 并查找到对应的用户数据进行呼叫鉴权处理， 通过分析 用户账户有效性在判断出本次呼叫有效后， 要求 MSC/SSP接续呼叫， 并对 用户进行计费； 最后当用户挂机后 SCP的控制过程结束， 从而完成一次呼 叫控制。
如图 2 所示， 为本发明第一实施例的处理流程图， 该实施例可以实现 当用户 A拨打电话到查号台， 查号台查到用户 A想要的电话号码后， 可以 直接通知网络交换设备将用户 A的呼叫转接到查询到的电话号码， 并使网 络侧的计费设备能够直接对用户 A基于和查询到的电话号码进行通信的过 程进行计费。 其中网络侧的具体处理过程为：
步骤 1 , 当用户 A发起呼叫到查号台时， A用户所在网络的 MSCa/SSP 上报 IDP消息给 A用户所在网络的 SCP;
步骤 2, SCP对用户 A鉴权通过后， 下发连接 ( CONNECT ) 消息给
MSCa/SSP, 以指示 MSCa/SSP将用户 A的呼叫接续到查号台所在网络的
MSCb/SSP;
步骤 3 , MSCa/SSP向 MSCb/SSP发送初始地址消息（IAM ) 以将呼叫 接续到查号台，其中发送的 IAM消息中携带有用户 A的移动用户漫游号码 ( MSRN, Mobile Station Roaming Number );
步骤 4, MSCb/SSP向 MSCa/SSP反馈应答消息 （ANM ), 从而接通用 户 A和查号台的通话；
步骤 5 , 查号台通过和用户 A进行通话， 询问用户 A想要查询的电话 号码， 并根据用户 A的需求查找到对应的电话号码， 并进而询问用户 A是 否需要查号台直接将呼叫转接到查询到的电话号码；
步骤 6, 如果用户 A要求查号台进而将呼叫直接转接到查找到的电话 号码， 则按照一个预定的协议通知用户 A所在网络的 MSCa/SSP, 该通知 消息中携带有查找到的电话号码 C,以通知 MSCa/SSP将呼叫继而转接到查 找到的电话号码 C;
步骤 7, MSCa/SSP接收到查号台发来的通知消息后， 向用户 A所在网 络的 SCP发送 BCSM事件报告消息 （ERB, Event Report BCSM ), 以通知 SCP被叫号码已发生了前转， 同时此 ERB消息中携带有前转后的电话号码 C (即查号台查询到的电话号码）；
步骤 8、 9, SCP根据接收到的 ERB消息， 得知被叫号码已前转到号码
C, 则对用户 A按照呼叫从用户 A到电话号码 C的通信费率进行预算， 并 根据预算结果下发 CONNECT消息给 MSCa/SSP, 以指示 MSCa/SSP将用 户 A的呼叫进而接续到前转后的号码 C,并向 MSCa/SSP下发计费请求（ AC, Apply Charging )消息， 以启动对用户 A基于和前转后的电话号码 C进行通 信进行计费， SCP在预算结果不支持用户 A和前转后的号码 C进行通信时， 可以直接向 MSCa/SSP下发 RealeaseCall消息，以指示 MSCa/SSP不允许将 用户 A的呼叫直接接续到前转后的电话号码 C;
步骤 10, MSCa/SSP根据 SCP下发的指示向前转后的号码 C所在的 MSCc/SSP发送初始地址消息（IAM )以将呼叫接续到号码 C, 其中发送的 IAM消息中携带有用户 A的 MSRN号码；
步骤 11 , MSCc/SSP向 MSCa/SSP反馈应答消息（ANM ), 从而接通用 户 A和查找到的电话号码 C的通话；
步骤 12, 用户 A和使用电话号码 C的被叫进行通话， SCP按照 A到 C 的通话费率对用户 A进行计费处理；
步骤 13 , 在通话结束时 MSCa/SSP 向 SCP 上报计费报告请求消息
( ACR, Apply Charging Report );
步骤 14, SCP接收到 ACR消息后， 对用户 A的此次通话进行费用结 算处理， 并出具话单， 向 MSCa/SSP下发 RealeaseCall ( RC )消息， 以指示 MSCa/SSP释放此次通话处理。 如图 3 所示， 为本发明第二实施例的处理流程图， 该实施例可以实现 在被叫用户出国时， 国内的主叫用户呼叫该被叫时， 可以提示主叫用户该 被叫已经出国， 是否愿意将呼叫前转到被叫用户的国外号码进行通话， 并 由主叫承担到被叫国外号码的通信费用。 其具体的实现过程如下：
步骤 a, 当用户 A发起呼叫以呼叫被叫用户时， A用户所在网络的
MSCa/SSP上报 IDP消息给 A用户所在网络的 SCP;
步骤 b, SCP对用户 A鉴权通过后， 下发 AC消息给 MSCa/SSP, 以启 动对用户 A的计费处理； 并在
步骤 c , SCP 下发连接 （CONNECT ) 消息给 MSCa/SSP , 以指示 MSCa/SSP将用户 A的呼叫接续到被叫用户所在网络的 MSCb/SSP;
步骤 d, MSCa/SSP向 MSCb/SSP发送 IAM消息以将呼叫接续到被叫 用户， 其中发送的 IAM消息中携带有用户 A的 MSRN号码；
步骤 e, f, 由于被叫用户出国， 其在国外购买了新的本地号码， 并在 国内办理了呼叫前转业务， 即将所有呼叫到国内号码上的呼叫全部转接到 在国外购买的当地号码上进行接听， 则 MSCb/SSP接收到 IAM消息时， 发 现该被叫用户已经定制了呼叫前转业务， 就按照一个约定协议将被叫发生 呼叫前转的消息及其前转后的被叫号码 C(即被叫用户在国外购买的当地号 码）通知给 MSCa/SSP;
步骤 g, MSCa/SSP接收到 MSCb/SSP发来的通知消息后， 向用户 A所 在网络的 SCP发送 ERB消息， 以通知 SCP被叫号码已发生了前转， 同时 此 ERB消息中携带有前转后的电话号码 C;
步骤 h, SCP根据接收到的 ERB消息， 得知被叫号码已前转到号码 C, 则通过 PA消息向主叫用户 A播放特殊提示音， 以提示用户 A被叫号码已 发生前转， 也可以进而友好地提示用户 A通话费用将会发生改变， 更进一 步还可以向用户 A播报将应用的通话费率， 然后提供选择给用户 A;
步骤 i, j , 用户 A听到语音提示后， 如果决定愿意继续和前转后的被 叫用户通话， 则可以不需釆用任何动作以表示继续通信， 如果用户不同意 和前转后的被叫继续通信， 则可以釆用直接挂机、 或者输入菜单提示等方 式告知 SCP中断通信， SCP在用户 A选择继续通信的情况下， 按照呼叫从 用户 A到电话号码 C的通信费率进行预算，并根据预算结果下发 CONNECT 消息给 MSCa/SSP, 以指示 MSCa/SSP将用户 A的呼叫进而接续到前转后 的号码 C, 并向 MSCa/SSP下发计费请求（AC, Apply Charging )消息， 以 启动对用户 A基于和前转后的电话号码 C进行通信进行计费， SCP在预算 结果不支持用户 A和前转后的号码 C进行通信时， 可以直接向 MSCa/SSP 下发 RealeaseCall消息， 以指示 MSCa/SSP不允许将用户 A的呼叫直接接 续到前转后的电话号码 C;
步骤 q, MSCa/SSP根据 SCP 下发的指示向前转后的号码 C 所在的 MSCc/SSP发送 IAM消息以将呼叫接续到号码 C, 其中发送的 IAM消息中 携带有用户 A的 MSRN号码；
步骤 m, MSCc/SSP向 MSCa/SSP反馈 ANM消息，从而接通用户 A和 处于国外的使用号码 C的被叫之间的通话；
步骤 n, 用户 A和使用电话号码 C的被叫进行通话， SCP按照 A到 C 的通话费率对用户 A进行计费处理；
步骤 r, 在通话结束时 MSCa/SSP向 SCP上报 ACR消息；
步骤 s, SCP接收到 ACR消息后， 对用户 A的此次通话进行费用结算 处理， 并出具话单， 最后向 MSCa/SSP下发 RealeaseCall ( RC )消息， 以指 示 MSCa/SSP释放此次通话处理。
在上述第一实施例的步骤 7 中， 及上述第二实施例的步骤 g 中， MSCa/SSP除了可以使用 ERB消息来向 SCP报告被叫发生了前转， 还可以 使用 IDP消息、 ACR消息的传递扩展单元来向 SCP报告该前转消息， 其实 现原理与使用 REB消息的实现过程相同， 在此不再给与过多赘述。
在上述两个实施例中， 都是由被叫前转前所在的 MSC/SSP将被叫发生 呼叫前转的消息通知给主叫用户所在的 MSC/SSP, 进而由主叫用户所在的 MSC/SSP通过 ERB消息、 IDP消息或 ACR消息来向 SCP报告被叫发生了 呼叫前转。 另外一种情况也可以由被叫前转前所在的 MSC/SSP将被叫发生 呼叫前转的消息通过 ERB消息、 IDP消息或 ACR消息直接通知给主叫用户 所在的 SCP, 在这种情况下， 由于被叫前转前所在的 MSC/SSP通知主叫用 户所在的 SCP 时， 主叫用户所在的 SCP 无法确定被叫前转前所在的 MSC/SSP通知上来的呼叫到底是哪一个呼叫， 所以需要在 ERB消息、 IDP 消息或 ACR消息中传递一个呼叫 ID, 使得主叫所在的 SCP知道通知上来 的呼叫具体是哪个呼叫， 使 SCP能够查找到原始的呼叫相关信息。
如图 4 所示， 为本发明前转业务处理系统的实施例组成结构框图， 其 中被叫侧交换设备 10, 用于在被叫发生呼叫前转的情况下， 将被叫发生呼 叫前转的消息通知给主叫侧交换设备 20,被叫侧交换设备 10可以和主叫侧 交换设备 20之间预先约定一个协议， 以通过该约定协议向主叫侧交换设备 20发送被叫发生呼叫前转的消息； 主叫侧交换设备 20, 用于将接收到的被 叫发生呼叫前转的消息上报给主叫侧计费设备 30, 并根据主叫侧计费设备 30的指示将呼叫接续到前转后的被叫，其中主叫侧交换设备 20可以通过扩 展的 BCSM事件报告消息 （ERB )、 IDP消息或 ACR消息将接收到的消息 上报给主叫侧计费设备 30; 主叫侧计费设备 30, 用于指示主叫侧交换设备 20将呼叫接续到前转后的被叫， 并对主叫基于前转后的通信过程进行计费 处理，更进一步主叫侧计费设备 30可以在主叫同意和前转后的被叫通信时， 指示主叫侧交换设备 20将呼叫接续到前转后的被叫， 并对主叫基于前转后 的通信过程进行计费处理。
此外， 被叫侧交换设备 10、 主叫侧交换设备 20和主叫侧计费设备 30 之间还可以有下述交互过程来达到本发明目的：
被叫侧交换设备 10, 用于在被叫发生呼叫前转的情况下， 将被叫发生 呼叫前转的消息通知给主叫侧计费设备 30,其中被叫侧交换设备 10可以通 过扩展的 ERB消息、 IDP消息或 ACR消息等将被叫发生呼叫前转的消息上 报给主叫侧计费设备 30; 主叫侧计费设备 30, 用于指示主叫侧交换设备 20 将呼叫接续到前转后的被叫， 并在主叫侧交换设备 20将呼叫接续到前转后 的被叫时， 对主叫基于前转后的通信过程进行计费处理， 更进一步主叫侧 计费设备 30可以在主叫同意和前转后的被叫通信时， 再指示主叫侧交换设 备 20将呼叫接续到前转后的被叫， 并在主叫侧交换设备 20将呼叫接续到 前转后的被叫时， 对主叫基于前转后的通信过程进行计费处理； 主叫侧交 换设备 20,用于根据主叫侧计费设备 30的接续指示将呼叫接续到前转后的 被叫。 上述系统中的交换设备通常为 MSC/SSP功能部分， 计费设备的功能通 常由 SCP来完成。
如图 5所示， 为本发明交换设备的第一实施例组成结构框图， 其中消 息通知单元 110, 用于在获知准备接续的被叫发生呼叫前转时， 将被叫发生 呼叫前转的消息通知给主叫所属的交换设备； 消息上报单元 120, 用于在交 换设备所管辖的主叫呼叫被叫时， 若接收到该被叫所属的交换设备发来的 被叫发生呼叫前转的通知消息， 则将该消息上报给主叫所属的 SCP, 其中 消息上报单元 120可以通过扩展的 ERB消息、 IDP消息或 ACR消息将被叫 发生呼叫前转的消息上报给主叫所属的 SCP; 接续单元 130, 用于在接收到 主叫所属的 SCP下发的将呼叫接续到前转后的被叫的指示时， 将呼叫接续 到前转后的被叫。
如图 6所示， 为本发明交换设备的第二实施例组成结构框图， 其中消 息通知单元 210, 用于在获知准备接续的被叫发生呼叫前转时， 将被叫发生 呼叫前转的消息通知给主叫所属的 SCP, 消息通知单元 210可以通过扩展 的 ERB消息、 IDP消息或 ACR消息将被叫发生呼叫前转的消息上报给主叫 所属的 SCP; 接续单元 220, 用于在接收到主叫所属的 SCP下发的将呼叫 接续到前转后的被叫的接续指示时， 将呼叫接续到前转后的被叫。
如图 7所示，为本发明 SCP的实施例组成结构框图，其中提示单元 310, 用于根据接收到的被叫发生呼叫前转的消息， 提示主叫是否同意和前转后 的被叫进行通信； 接续指示单元 320, 用于在主叫同意和前转后的被叫通信 时， 指示主叫所属的交换设备将呼叫接续到前转后的被叫； 计费单元 330 , 用于对主叫基于前转后的通信过程进行计费。
本发明技术方案通过由网络中的 MSC和 SCP相互配合，来实现在主叫 用户呼叫的被叫用户发生呼叫前转时， 将前转消息通知给主叫用户所在的 SCP, 以由主叫用户所在的 SCP对主叫用户基于和前转后的被叫的通信过 程进行计费， 从而实现了在主叫用户同意承担和前转后的被叫用户的通信 费用的情况下， 实现呼叫前转业务， 进而扩展了呼叫前转业务的灵活性， 增强了呼叫前转过程对主叫用户的透明性。 此外在本发明中网络中各设备 之间交互的信令都是基于标准信令进行扩展的， 因此和现有网络的兼容性 比较好。 本发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权 利要求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在

Claims

权 利 要 求
1、 一种呼叫前转的实现方法， 其特征在于， 包括：
当第一被叫发生呼叫前转， 被叫侧将被叫发生呼叫前转的信息通知给 主叫侧；
主叫侧接收到所述信息后， 将呼叫接续到前转后的第二被叫。
2、 如权利要求 1所述的方法， 其特征在于， 还包括：
对主叫到所述第二被叫的通信过程进行计费。
3、 如权利要求 1所述的方法， 其特征在于， 还包括：
在主叫侧将呼叫接续到前转后的被叫之前，
主叫侧给出是否同意和前转后的被叫通信的提示，
在主叫同意和前转后的被叫通信时， 执行将呼叫接续到前转后的第二 被叫处理。
4、 如权利要求 3所述的方法， 其特征在于，
所述提示包括从主叫到所述第二被叫的通信费率信息；
在主叫同意并进行与所述第二被叫通信时， 按照所述通信费率进行通 信。
5、 如权利要求 2所述的方法， 其特征在于， 还包括：
在将呼叫接续到前转后的第二被叫之前， 对所述主叫到所述第二被叫 之间的通信进行鉴权；
当通过鉴权后， 将呼叫接续到所述第二被叫。
6、 如权利要求 5所述的方法， 其特征在于， 所述对主叫到所述第二被 叫之间的通信进行鉴权， 具体包括：
对从主叫到所述第二被叫的通信费进行预算， 在预算结果支持主叫到 所述第二被叫的通信时， 接续从所述主叫到所述第二被叫的呼叫。
7、 如权利要求 1所述的方法， 其特征在于， 所述将被叫发生呼叫前转 的信息是通过下述消息通知给主叫侧：
扩展的 BCSM事件报告消息、 初始检测点消息或计费报告消息。
8、 一种呼叫前转业务处理系统， 其特征在于， 包括被叫侧交换设备、 主叫侧交换设备和计费设备， 被叫侧交换设备， 在第一被叫发生呼叫前转的情况下， 将被叫发生呼 叫前转的信息通知给主叫侧交换设备；
主叫侧交换设备， 根据接收到的所述信息将呼叫接续到前转后的第二 被叫。
9、 如权利要求 8所述的系统， 其特征在于， 还包括：
计费单元， 在所述主叫侧交换设备将呼叫接续到前转后的第二被叫， 按照预定费率对主叫到所述第二被叫的通信过程进行计费。
10、 如权利要求 8 所述的系统， 其特征在于， 在主叫侧将呼叫接续到 前转后的被叫之前，
所述主叫侧交换设备给出是否同意和前转后的被叫通信的提示， 在主叫同意和前转后的被叫通信时， 所述主叫侧交换设备执行将呼叫 接续到前转后的第二被叫处理。
11、 如权利要求 8 所述的系统， 其特征在于， 在主叫侧交换设备将呼 叫接续到前转后的第二被叫之前，
所述计费单元对从主叫到所述第二被叫的通信费进行预算， 在预算结 果支持主叫到所述第二被叫的通信时， 接续从所述主叫到所述第二被叫的 呼叫。
12、 一种呼叫前转业务处理系统， 其特征在于， 包括被叫侧交换设备、 主叫侧交换设备和主叫侧计费设备，
被叫侧交换设备， 用于在被叫发生呼叫前转的情况下， 将被叫发生呼 叫前转的消息通知给主叫侧计费设备；
计费设备， 用于在接收到被叫发生呼叫前转的消息时， 指示主叫侧交 换设备将呼叫接续到前转后的被叫， 并在主叫侧交换设备将呼叫接续到前 转后的被叫时， 对主叫基于前转后的通信过程进行计费；
主叫侧交换设备， 用于根据主叫侧计费设备的指示将呼叫接续到前转 后的被叫。
13、 如权利要求 12所述的系统， 其特征在于， 所述计费设备在主叫同 意和前转后的被叫通信时， 向主叫侧交换设备下发所述指示， 以及执行计 费处理。
14、 一种交换设备， 其特征在于， 包括：
消息通知单元， 用于在获知准备接续的被叫发生呼叫前转时， 将被叫 发生呼叫前转的消息通知给主叫所属的业务控制点；
接续单元， 用于在接收到主叫所属业务控制点下发的将呼叫接续到前 转后的被叫的指示时， 将呼叫接续到前转后的被叫。
15、 如权利要求 14所述的交换设备， 其特征在于， 还包括： 消息上报单元， 用于在交换设备所管辖的主叫呼叫被叫时， 若接收到 该被叫所属的交换设备发来的被叫发生呼叫前转的通知消息， 则将该消息 上才艮给主叫所属的业务控制点。
16、 如权利要求 15所述的交换设备， 其特征在于， 所述消息上报单元 通过扩展的 BCSM事件报告消息、 初始检测点消息或计费报告消息将被叫 发生呼叫前转的消息上 给主叫所属的业务控制点。
17、 一种业务控制点， 其特征在于， 包括：
接续指示单元， 用于根据接收到的被叫发生呼叫前转的消息， 指示主 叫所属的交换设备将呼叫接续到前转后的被叫；
计费单元， 用于对主叫基于前转后的通信过程进行计费。
18、 如权利要求 17所述的业务控制点， 其特征在于， 还包括： 提示单元， 用于根据接收到的被叫发生呼叫前转的消息， 提示主叫是 否同意和前转后的被叫进行通信；
所述接续指示单元在主叫同意和前转后的被叫通信时， 指示主叫所属 的交换设备将呼叫接续到前转后的被叫。
19、 一种计费方法， 其特征在于， 包括：
当第一被叫发生呼叫前转， 被叫侧将被叫发生呼叫前转的信息通知给 主叫侧；
主叫侧接收到所述信息后， 将呼叫接续到前转后的第二被叫； 对主叫到所述第二被叫的通信过程进行计费。
20、 如权利要求 19所述的方法， 其特征在于， 还包括：
在主叫侧将呼叫接续到前转后的被叫之前，
主叫侧给出是否同意和前转后的被叫通信的提示， 在主叫同意和前转后的被叫通信时， 执行将呼叫接续到前转后的第二 被叫处理。
21、 如权利要求 20所述的方法， 其特征在于， 还包括：
所述提示包括从主叫到所述第二被叫的通信费率信息；
在主叫同意并进行与所述第二被叫通信时， 按照所述通信费率进行通 信。
22、 如权利要求 19、 20或 21所述的方法， 其特征在于，
在将呼叫接续到前转后的第二被叫之前， 对所述主叫到所述第二被叫 之间的通信进行鉴权；
当通过鉴权后， 将呼叫接续到所述第二被叫。
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