WO2006102834A1

WO2006102834A1 - A call connection method

Info

Publication number: WO2006102834A1
Application number: PCT/CN2006/000510
Authority: WO
Inventors: Yi Zhang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-04-01
Filing date: 2006-03-27
Publication date: 2006-10-05
Also published as: CN1842171A; CN100558174C

Abstract

A call connection method, which sets logical number and physical number for the user, and establishes mapping list for logical number and physical number. When the caller dials the number of the called to initiate a call, the caller side office decides whether the called has set a physical number, and takes said called number as a logical number to obtain a corresponding physical number from the mapping list when a physical number is set, then connects the caller with the called by routing the call according to the physical number of the called. The method of the present invention increases the utility ratio of the number resource while the user moves from one telecom offices to another without changing his telephone number.

Description

Call connection method

Technical field

The present invention relates to the field of communications, and more particularly to a call connection method. Background technique

Traditional telephone users will have to cancel the original telephone number when they move across the office and re-apply for a new telephone number to make a call or call connection based on the new telephone number. This brings a lot of change to the user. To this end, the industry has introduced a new technology for changing the number of mobile phones, which satisfies the need for users to cross-office transfer, without having to re-apply for new numbers, and still use the original telephone number.

The Number Portability (NP) scheme implements the flow of user numbers, as shown in the figure.

As shown in Figure 1, after the user crosses the office to change the number, a new phone number is applied, and the original phone number is also occupied. There is a corresponding relationship between the old and new numbers. If the calling user dials the number before the change number, the system determines whether the called user has changed the number, if the number is translated into its new number, and continues; otherwise, the previous number is connected. Thus, the indirect implementation of the user's cross-office transfer does not change the number.

However, the NP solution only does not change the number of other users who call the NP user. However, for the NP user applying for the service, it is still necessary to change the number, and the user is inconvenient to use.

The NP scheme requires the user to still occupy the original number after the number is changed. That is, the user who applied for the NP service must occupy two number resources at the same time, which reduces the utilization of the number resource and improves the maintenance cost of the operator, thereby limiting the NP service. Massive promotion. Summary of the invention

In view of this, the main object of the present invention is to provide a call connection method for improving the utilization of number resources, and at the same time, when the user moves across the office, the original telephone number may not be changed.

To achieve the object, the present invention provides the following technical solutions:

A call connection method, which sets a logical number and a physical number for a user, and establishes a logical number and physical number mapping table. When the calling user calls the called user, the method includes the following steps:

When the calling client station detects the call signal sent by the calling user, accepts the corresponding call request; Determining whether the called user has a physical number, and when the called user sets a physical number, obtaining a physical number of the called user corresponding to the logical number of the called user from the mapping table; routing according to the physical number of the called user , connect the calling user to the called user. It is determined whether the called user has a physical number by searching whether the number of the called user is a logical number of the mapping table; or determining whether the called user has a physical number by analyzing the called user number field.

After accepting the call request, determining whether the calling user has a physical number set; if a physical number is set, determining a logical number corresponding to the calling user physical number lookup mapping table, and placing the logical number under Send to the called user end office. The physical number is composed of a local prefix and an internal number of the end office. When the calling user end office determines that the calling user has a physical number, the local prefix is added to the internal number corresponding to the calling user as a physical number and sent. . The physical number is formed by the office prefix and the internal number of the end office. When the calling user end office routes the call, it determines whether the local prefix of the physical number of the called user is the local prefix. If it is the local prefix, the local prefix is deleted and the internal prefix is deleted. Continuation; otherwise, the office prefix is used to route to the called user end office for connection. The physical number is composed of a route prefix prefix and an internal number of the end office. When the calling user end office determines that the calling user has a physical number, the calling party is added before the internal number corresponding to the calling user. The prefix of the route prefix corresponding to the user station constitutes the physical number of the calling party, and the physical number is sent out. The physical number is composed of a route prefix prefix and an internal number of the end office, and the calling user end office is connected to the called user end office according to the trunk line corresponding to the prefix, and is connected according to the internal number of the called user end office. . The physical number corresponds to a port or a telephone line of the switch. The logical number and physical number mapping table is stored on the end office switch to which the user belongs, and the calling user end office determines whether the called user has a physical number. The logical number and physical number mapping table are set on a service control point (SCP), The call is triggered to the service control point, and the service control point searches the mapping table to determine whether the called user has a physical number. When it is determined that the physical number is set, the physical number is carried in the delivered connection command.

The calling user end office determines whether the calling user has a physical number. If the calling user sets a physical number, the physical number is carried to the service control point, and the service control point obtains the corresponding information from the mapping table. After the number is delayed, the logical number is carried in the subsequent connection instruction. Otherwise, the calling number is determined according to the normal procedure.

The calling client station reports the call request to the service switching point (SSP), and the IAM signaling carries the calling number and the called user number; the service switching point (SSP) triggers the call to the service control point (SCP). The IDP signaling includes the calling physical number and the called user number.

The present invention sets a logical number and a physical number for the user, and the logical number is separated from the physical number, that is, the telephone number (logical number) used by the user can still maintain the existing numbering scheme, and the user is assigned a number corresponding to the internal of the switch. Physical number. Therefore, the user can truly cross-office transfer without changing the number. DRAWINGS

1 is a schematic flow chart of an NP solution in the prior art;

2 is a schematic diagram showing the separation of a physical number and a logical number according to the present invention;

FIG. 3 is a schematic diagram of an embodiment of the present invention. detailed description

In the present invention, a scheme in which a physical number and a logical number are separated is used, that is, a logical number and a physical number are set for one user. The logical number refers to the unique number assigned by the operator to the user, and is also the number published by the user. When the user sets the logical number and the physical number, when the user makes the calling party, the logical number is the calling number displayed by the called party; when the user acts as the called party, it is the number dialed by the calling party; The number that identifies the user and bills between carriers. If you do not want to change the existing user usage number, the logical number can be consistent with the existing user usage number. That is, when the user applies for the physical number, the user's existing number is used as the logical number; or according to the new number. The rule assigns a new logical number to it. If the number of the first number segment is 123, the number is a logical number. Thus, when determining whether the user has applied for a physical number, the system can determine based on the first number segment of the called subscriber number. The physical number of the user (that is, the routing number: LRN) refers to the routing number assigned by the operator to the user. The number is not advertised outside and is the internal number of the network. The number corresponds to a port or subscriber line in the fixed switch, and the physical number information of the user is stored in a fixed switch or a database connected to the switch. The local network switching device can address the physical port where the user is located according to the number. When the local network switching device detects that a port or subscriber line has a call, it can retrieve the physical number information stored on the fixed switch according to the hardware address of the call, and determine whether the port or the subscriber line is set with a physical number. For example, according to the coding rule of the hardware address corresponding to the physical number, it is determined whether the physical number corresponding to the hardware address of the call is in the physical number information on the fixed switch. If yes, it is determined that the user has a physical number. If the physical number is a hardware address, the physical number information can also be directly retrieved according to the hardware address for judgment. The way to set the physical number for the user based on the switch port or subscriber line ^[艮多. For example, the number of the physical number can be in the form of "office prefix + internal number". When the calling user calls out, the switch detects that a certain port or subscriber line has a call, accepts the call, and determines the port or subscriber line. The corresponding physical number is sent by inserting the local prefix method before the internal number. When the user calls in, the called number received by the switch is "office prefix + internal number". The calling user end office analyzes whether the current prefix is the local prefix. If yes, the prefix is deleted and the connection is continued according to the internal number; if not, then The board prefix is used to route to the called user end office, and the connection is continued according to the internal number. The prefix of the office can be numbered according to the level of the office. For example, the prefix number is the long distance office, the tandem office, and the end office. Since many services in the intelligent network, such as 200 and 201, are routed through the routing prefix, the physical number can also be numbered in the form of "route prefix prefix + internal number". At this time, when the user calls in, the called number received by the switch is " prefix prefix + internal number", and the calling user end office analyzes the prefix of the prefix to determine the corresponding trunk, and then performs corresponding routing and call connection.

The core idea of the present invention is to provide a call connection method, set a logical number and a physical number for a user, and establish a logical number and physical number mapping table. When the calling user dials the called user number to initiate a call, the connection method Including the following steps:

A. When the calling client station detects that the port corresponding to the calling user or the telephone line has a call, accepts the call request.

B. determining whether the called user has a physical number, and if yes, searching the mapping table with the called user number as a logical number, and obtaining the physical number of the called user; C. According to the physical number routing of the called user, the calling user is connected to the called user.

The logical number and physical number mapping table is searched. When the called user number appears in the logical number entry of the mapping table, it is determined that the called user has a physical number set; or the logical number field is used for judgment.

It is determined whether the calling user has a physical number, and if so, the corresponding physical number is determined according to the calling user physical number lookup mapping table, and the logical number is delivered to the called user end office.

If neither the calling user nor the called user has a physical number, they are processed according to the normal process of the industry.

For telecommunication systems with intelligent networks, logical number information can be stored at the service control point.

On the SCP (service control point), the physical number information is stored on the SCP and the switch, as shown in Figure 2. When the SCP and the switch perform signaling interaction, they must first perform number translation and translate the logical number into a physical number. A user logical number and a physical number mapping table may be established on the SCP, and the number translation may be performed according to the mapping table. However, for ordinary users, all that is known is the logical number, the physical number is not visible, and the operator uses logical numbers for maintenance in daily operations. The logical number, the physical number, and the correspondence between the two may also be stored on the switch, such as the Home Location Register (HLR) stored in the switch.

Therefore, it is necessary to subdivide the original two levels and subdivide a business level in the SCP layer, as shown in Figure 2.

As a first embodiment of the present invention, the logical number and physical number mapping table is stored on the SCP, and the physical number is stored on the switch. When the calling party is a user who sets a physical number and a logical number, the call connection according to the present invention is used. The process is as follows:

1. The calling user dials the called number and initiates a call to the called user. The calling user end office detects that the port corresponding to the calling user or the telephone line has a call, accepts the call request, and determines the calling according to the port and the telephone line. Whether the user has a physical number, and if so, the physical number of the calling user is determined, and the request is reported to the Service Switching Point (SSP), and the initial address message carries the calling physics. Number and called user number;

Wherein, if the physical number of the calling user is in the form of a local prefix + an internal number, the calling party uses The account office sends the prefix according to the calling party's internal number corresponding to the calling party end office.

2. The SSP triggers the call to the SCP, where the initial detection point IDP (Initial Detect Point) signaling includes the physical number of the calling user and the called user number.

3. The SCP determines, according to the called user number, that the called user does not have a physical number, and then searches the physical number and logical number mapping table of the user according to the physical number of the calling user to obtain the logical number of the calling user.

4. The SCP sends a connection instruction to the SSP, and carries the logical number of the calling user and the called user number in the connection instruction CONNECT signaling;

5. The SSP connects the calling user to the called user and displays the logical number of the calling user to the called user terminal.

If the calling user does not set a physical number, the caller number is determined according to the current normal process in the industry, the request is sent to the SSP by the calling user end office, the trigger signaling of the SSP to the SCP, and the SCP are sent to the SSP. The calling subscriber number is carried in the connection signaling.

When called as a user who has set a physical number and a logical number, the call connection method according to the present invention is as follows:

1) The calling user dials the called number, initiates a call to the called user, and the calling user end office accepts the call request, and determines that the calling user does not have a physical number according to the port and the telephone line, and reports the request to the SSP. The IAM signaling carries the calling number and the called user number;

2) The SSP triggers the call to the SCP, where the IDP signaling includes the calling number and the called user logical number;

3) The SCP searches the user's physical number and logical number mapping table according to the called user number, determines that the called party has a physical number, and obtains the physical number of the called user by using the called user number as a logical number;

4) The SCP sends a connection instruction to the SSP, and carries the calling number and the physical number of the called user in the CONNECT signaling;

5) The SSP routes the calling user to the called user according to the physical number of the called user. If the called user's physical number is routed by the prefix + the internal number, the route is selected according to the office prefix to determine the end office to which the called party belongs. At this point, the calling client end office analyzes the current prefix is Whether it is the prefix of the local office. If yes, the prefix is deleted and connected according to the internal number; otherwise, the local prefix is used to select the route to the called user end office, and the connection is continued according to the internal number.

When the calling user and the called user are both users who have set the physical number and the logical number, the call connection method process of the present invention is as shown in FIG. 3:

I. The calling user dials the called number and initiates a call to the called user. The calling user end office detects that the port corresponding to the calling user or the telephone line has a call, accepts the call request, and determines the calling according to the port and the telephone line. The user sets a physical number, determines the physical number, and reports the request to the SSP. The IAM signaling carries the calling physical number and the called user logical number.

If the physical number route of the calling user is the office prefix + the internal number, the calling user station sends the prefix according to the calling party before the internal number corresponding to the calling user end office.

II. The SSP triggers the call to the SCP, where the IDP signaling includes the calling physical number and the called user number.

III. The SCP searches the physical number and logical number mapping table of the user according to the physical number of the calling party, obtains the logical number of the calling user, searches the physical number of the user and the logical number mapping table according to the called user number, and determines that the called user has the physical number set, and Obtaining the physical number of the called user by using the called user number as a logical number;

IV, the CP sends a S connection instruction to the SSP, and carries the logical number of the calling user and the physical number of the called user in the CONNECT signaling;

V and SSP are routed according to the physical number of the called user, and the calling user is connected to the called user, and the logical number of the calling user is displayed to the called user terminal.

If the physical number route of the called user is the office prefix + the internal number, the route is selected according to the office prefix to determine the end office to which the called party belongs. At this time, the calling user end office analyzes whether the current prefix is the local prefix. If yes, the prefix is deleted and the connection is continued according to the internal number; otherwise, the local prefix is used to perform routing to the called user end office, and the connection is performed according to the internal number. .

As a second embodiment of the present invention, the logical number, the physical number, and the corresponding relationship between the two may also be stored on the switch. When the calling party is a user who sets a physical number and a logical number, the present invention The call connection method process is as follows:

The calling user dials the called number and initiates a call to the called user. When the calling user station detects that the calling port corresponds to the port or the telephone line has a call, the calling request is accepted. The port or the telephone line determines the physical number corresponding to the calling user;

The physical number and logical number mapping table of the user are searched according to the physical number of the calling party, and after determining the logical number corresponding to the physical number, the calling user is connected to the called user, and the logical number of the calling user is displayed to the called user terminal.

If the physical number of the calling user is the office prefix + the internal number, the calling user station sends the prefix according to the internal number corresponding to the calling user in the calling user end office.

The calling user dials the called number, initiates a call to the called user, and the calling user end office accepts the call request, and the calling user end office searches the user physical number and the logical number mapping table according to the logical number of the called user to obtain the called The physical number of the called user is routed according to the physical number of the called user, and the calling user is connected to the called user.

When both the calling user and the called user are users with physical numbers and logical numbers, the call connection method according to the present invention is as follows:

The calling user dials the called number and initiates a call to the called user. When the calling user station detects that the calling port corresponds to the port or the telephone line has a call, the calling party accepts the call request according to the calling physical number and the called party. The user logical number searches the user physical number and the logical number mapping table, and obtains the logical number of the calling user and the physical number of the called user.

The calling user end office routes the calling user according to the physical number of the called user, connects the calling user to the called user, and displays the logical number of the calling user to the called user terminal.

The invention sets a logical number and a physical number for the user, and the logical number is the same as the physical number. The phone number (logical number) used by the user can still maintain the existing numbering plan while assigning the user a physical number corresponding to the number inside the switch. Therefore, the user can truly cross-office transfer without changing the number. When the user moves across the office, the system only needs to re-do the comparison between the physical number and the logical number. This process is transparent to the user, and the user's operation is no different from the original, so it is easy to use. Each user only needs to occupy one logical number, and does not need to occupy two number resources, thereby improving the usage rate of the number resources and reducing the maintenance cost.

Claims

Rights request

A call connection method, which is characterized in that a logical number and a physical number are set for a user, and a logical number and a physical number mapping table are established, and when the calling user calls the called user, the method includes:

When the calling client station detects the call signal sent by the calling user, it accepts the corresponding call request;

Determining whether the called user has a physical number, and when the called user sets a physical number, obtaining a physical number of the called user corresponding to the logical number of the called user from the mapping table; routing according to the physical number of the called user , connect the calling user to the called user.

The method according to claim 1, wherein determining whether the called user is set with a physical number is to determine whether the called user is set by searching whether the number of the called user is a logical number of a mapping table. There is a physical number; or, by analyzing the called user number field to determine whether the called user has a physical number.

3. The method of claim 1, further comprising:

After accepting the call request, determining whether the calling user has a physical number set; if a physical number is set, determining a logical number corresponding to the calling user physical number lookup mapping table, and placing the logical number under Send to the called user end office.

The method according to claim 3, wherein the physical number is formed by a local prefix plus an internal number of the end office, and when the calling user end office determines that the calling user has a physical number, the main The internal number corresponding to the user is added to the local prefix as the physical number and sent.

The method according to claim 1, wherein the physical number is formed by a local prefix plus an internal number of the end office, and the calling user end office routes the call to determine whether the local prefix of the physical number of the called user is the local prefix. If the local prefix is used, the prefix of the office is deleted and connected according to the internal number; otherwise, the prefix is selected by the office prefix to the called user end office for connection.

The method according to claim 3, wherein the physical number is formed by a prefix of a routing prefix and an internal number of the end office, and the calling user end office determines that the calling user has a physical number. Before the internal number corresponding to the calling user, the prefix of the routing prefix corresponding to the calling user end office is formed to constitute the physical number of the calling user, and the physical number is sent out.

The method according to claim 1, wherein the physical number is formed by a prefix of a routing prefix and an internal number of the end office, and the calling user end office only according to the trunk line corresponding to the prefix The called user end office is connected according to the internal number of the called user end office.

The method according to any one of claims 1 to 7, wherein the physical number corresponds to a port or a telephone line of the switch.

The method according to claim 8, wherein the logical number and physical number mapping table is stored on an end office switch to which the user belongs, and the calling user end office determines whether the called user has a physical number. .

10. The method according to claim 1, wherein the logical number and physical number mapping table are set on a service control point (SCP), and when the call is triggered to a service control point, the service control point searches for The mapping table is used to determine whether the called user has a physical number. When it is determined that the physical number is set, the physical number is carried in the delivered connection command.

The method of claim 10, further comprising:

The calling user end office determines whether the calling user has a physical number. If the calling user sets a physical number, the physical number is carried to the service control point, and the service control point obtains the corresponding information from the mapping table. After the logical number, the logical number is carried in the delivered connection instruction. Otherwise, the calling number is determined according to the normal procedure.

The method according to claim 10 or 11, further comprising: the calling client station reports the call request to a service switching point (SSP), where the IAM signaling carries the calling number and the called user number. The Service Switching Point (SSP) triggers the call to the Service Control Point (SCP), where the IDP signaling includes the calling physical number and the called subscriber number.