CN106550347B - Method for realizing called number completion, Vo L TE terminal, base station and system - Google Patents
Method for realizing called number completion, Vo L TE terminal, base station and system Download PDFInfo
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- CN106550347B CN106550347B CN201510606375.7A CN201510606375A CN106550347B CN 106550347 B CN106550347 B CN 106550347B CN 201510606375 A CN201510606375 A CN 201510606375A CN 106550347 B CN106550347 B CN 106550347B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
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Abstract
The invention discloses a method for realizing called number completion, a Vo L TE terminal, a base station and a system, wherein the method comprises the following steps of acquiring the country code and the area number of the current access cell of the Vo L TE terminal through broadcasted system information, completing the called number into a global number format according to the country code and the area number of the current access cell when the Vo L TE terminal dials, and sending a call request to the called number by the Vo L TE terminal in the global number format to enable the called number to be routed to a home network.
Description
Technical Field
The invention relates to the technical field of IMS (IP multimedia subsystem) and IMS-based L TE voice service (Vo L TE), in particular to a method for realizing called number completion, a Vo L TE terminal, a base station and a system.
Background
Vo L TE is a standard scheme of L TE voice determined in 2010 by GSMA (global system for Mobile operator alliance). in the Vo L TE scheme, a native terminal with a built-in Vo L TE chip is attached to a L TE wireless network and an EPC core network and then is accessed to an IMS network of a telecom operator, and the IMS network is used as a core control network of Vo L TE to complete call control, traffic routing and service triggering of Vo L TE voice.
In IMS networks, calls are routed based on called Global format e.164 numbers (Global Number). For mobile numbers, the format of global number is (country code) + (net number) + (H0H1H2H3) + (ABCD); for fixed numbers, the global number format is (country code) + (area code) + (local number).
In order to keep consistency of user dialing habits and service experiences, the Vo L TE terminal will continue the dialing rules of the existing 2/3G mobile phone terminal, wherein the dialing mode of calling a fixed number is local number/(long distance prefix) + (area code) + (local number), and the dialing mode of calling a mobile number is network number) + (H)0H1H2H3) + (ABCD), not a global number. At this time, the country code and area code in the called number must be complemented for proper routing in the IMS.
In the process of implementing the present invention, the inventor finds that the called area code completion technology in the existing IMS at least has the following problems:
the IMS network follows the separation of call control and service control, the modified number belongs to a service function, and cannot be implemented on the call control network element CSCF, and in addition to the home control attribute of the IMS, 3GPP proposes a scheme of setting a called number completion Application Server (AS) in the home IMS network: the service edge access control (BAC) accessed by the user adds the phone-context field carrying the country code and the area number information in the Request-URI of the user call Request INVITE message, and completes the called number completion according to the phone-context by the home IMS network number completion AS. For example, a Beijing user roams to Shanghai, dials 50440045 number, and issues a Request-URI of "Tel: 50440045 ", and the shanghai BAC, after receiving the message, adds a phone-context parameter carrying the country code and shanghai area number +8621, where the Request-URI of the INVITE message is" Tel: 50440045, respectively; phone-context ═ 8621 ". The IMS network routes the INVITE message, returns to the home location for service triggering, and completes the called number by a number completion AS of the home location according to the phone-context parameter to form a Request-URI of' Tel: +862150440045 "to route the INVITE message to the shanghai 50440000 user. The specific implementation is shown in figure 1.
In the actual networking of the IMS, the BAC device usually adopts a provincial centralized deployment mode, and one BAC corresponds to the access of a plurality of local networks, in this case, the BAC cannot distinguish which local network the terminal accesses from, and cannot fill the corresponding area number in a phone-context.
In the prior 2/3G technology, when a mobile terminal makes a roaming call, if a dialed fixed number is in a local number format without an area number, a roaming Mobile Switching Center (MSC) supplements the area number of a roaming area before a called number according to the office direction of a Base Station Controller (BSC) (the BSC is locally deployed), and then routes and continues the roaming area number, the dialing method and the service experience are continued to Vo L TE service based on the continuity of the use habits of the user, if the called number is supplemented according to calling information based on the number completion method of the fixed access IMS, the called number can be supplemented correctly in a non-roaming scene, but when the user dials the local number in a roaming scene, the IMS network supplements the called number to the area number of a calling home area and continues to the home area number regardless of the IMS, and the roaming area number which the user originally wants to continue is the roaming area number, so that the routing error of the roaming call occurs, for example, the roaming user has no calling number L TE, dials a number in Shanghai, and continues to the Beijing area number 56, but if the called number is supplemented by Beijing number based on Beijing 861050440045, the Beijing H + 4625, the Beijing number which the calling error occurs.
In addition to the above problems, the existing AS-based number completion scheme needs the home IMS network to route all calls initiated by the terminal to the number completion AS in a service-triggered manner, which not only has an extremely high requirement on the performance of the AS and thus causes an increase in equipment cost, but also lengthens the path of call routing. Meanwhile, in order to complete the triggering of the user call to the AS, an iFC for number completion needs to be configured for each user, and the iFC is used to direct the call forwarding to the number completion AS, so that the user data configuration amount is very large, and the overhead of the home subscriber server HSS is also increased.
Namely, the IMS called number completion technology provided by 3GPP can realize that the called number is complemented according to the access location information of the terminal, but the specific BAC device deployment requirement does not conform to the actual networking scheme of the operator; the method for complementing the called number according to the calling information adopted by the operator in the actual networking can only complement the called area number as the home area number, and cannot be applied to the mobile terminal with the roaming characteristic. Meanwhile, the AS-based called number complementing method also brings about the deployment cost of high-performance equipment, complex data configuration and call routing detour.
Disclosure of Invention
The invention aims to solve the problem of called number completion of a mobile terminal in an IMS network.
According to one aspect of the present invention, a method for completing called number completion is provided, including:
acquiring a country code and an area code of a current access cell of the Vo L TE terminal through broadcasted system information;
when the Vo L TE terminal dials, completing the called number into a global number format according to the country code and area code of the current access cell;
the Vo L TE terminal sends a call request to the called number in a global number format to route the called number to the home network.
Further, if the called number is a local number, complementing a country code and an area code in the called number;
if the called number is a mobile number, complementing a country code in the called number;
and if the called number contains the long-distance prefix, deleting the long-distance prefix of the called number and complementing the country code.
Further, after acquiring the country code and area code to which the current access cell belongs, the Vo L TE terminal compares the country code and area code with the country code and area code stored locally;
if the country code and the area code of the current access cell are different from the country code and the area code which are locally stored, updating the information of the country code and the area code;
otherwise, the current country code and area code information is maintained.
According to another aspect of the present invention, a method for completing called number completion is further provided, including:
setting a country code cell and an area code cell in a system information block, and broadcasting the country code and the area code of the current access cell to the Vo L TE terminal;
receiving a request of the Vo L TE terminal to call a called number in a global number format, wherein the global number format comprises a country code and an area code to which a current access cell belongs, and routing the called number to a home network.
Further, after updating the country code cell and the area code cell of the system information block, the updated country code and area code information are broadcasted to the Vo L TE terminal.
According to another aspect of the present invention, a method for completing called number completion is further provided, including:
setting a country code cell and an area code cell in a system information block, and broadcasting the country code and the area code to the Vo L TE terminal;
the Vo L TE terminal acquires the country code and the area code of the current access cell of the Vo L TE terminal through the broadcasted system information;
when the Vo L TE terminal dials, completing the called number into a global number format according to the country code and area code of the current access cell;
the Vo L TE terminal sends a call request to the called number in a global number format to route the called number to the home network.
Further, if the called number is a local number, complementing a country code and an area code in the called number;
if the called number is a mobile number, complementing a country code in the called number;
and if the called number contains the long-distance prefix, deleting the long-distance prefix of the called number and complementing the country code.
Further, after acquiring the country code and area code to which the current access cell belongs, the Vo L TE terminal compares the country code and area code with the country code and area code stored locally;
if the country code and the area code of the current access cell are different from the country code and the area code which are locally stored, updating the information of the country code and the area code;
otherwise, the current country code and area code information is maintained.
According to another aspect of the present invention, there is also provided a Vo L TE terminal for implementing called number completion, including:
the acquisition module is used for acquiring the country code and the area code of the current access cell of the Vo L TE terminal through the broadcasted system information;
a number completion module, configured to complete the called number into a global number format according to the country code and area code of the current access cell when the Vo L TE terminal dials;
and the calling module is used for sending a calling request to the called number in a global number format so as to route the called number to a home network.
Further, the number complementing module is used for complementing a country code and an area code in the called number if the called number is a local number; if the called number is a mobile number, complementing a country code in the called number; and if the called number contains the long-distance prefix, deleting the long-distance prefix of the called number and complementing the country code.
The obtaining module is further used for comparing the country code and the area code which the Vo L TE terminal belongs to with the country code and the area code which are locally stored after the Vo L TE terminal obtains the country code and the area code which the current access cell belongs to, updating the information of the country code and the area code if the country code and the area code which the current access cell belongs to are different from the country code and the area code which are locally stored, and otherwise, keeping the information of the current country code and the area code.
According to another aspect of the present invention, there is also provided a base station for implementing called number completion, including:
the setting module is used for setting a country code cell and an area code cell in a system information block;
the broadcasting module is used for broadcasting the country code and the area code of the current access cell to the Vo L TE terminal;
and the routing module is used for receiving a request that the Vo L TE terminal calls a called number in a global number format, wherein the global number format comprises a country code and an area code to which a current access cell belongs, and routing the called number to a home network.
Further, the broadcasting module is configured to broadcast the updated country code and area code information to the Vo L TE terminal after updating the country code cell and the area code cell of the system information block.
According to another aspect of the present invention, a system for implementing called number completion is also provided, which includes any of the Vo L TE terminals and any of the base stations.
Compared with the prior art, the invention transmits the country code and the area code of the current access cell of the Vo L TE terminal to the Vo L TE terminal through the expanded system broadcast information, completes the called number to the global number format according to the country code and the area code of the current access cell when the Vo L TE terminal dials, and transmits the call request to the called number in the global number format by the Vo L TE terminal so as to lead the called number to be routed to the home network, thereby ensuring the correct connection of the Vo L TE terminal call, especially the roaming call on the premise of not changing the IMS networking mode of an operator.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
The invention will be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram of a 3GPP AS-based called number completion implementation flow.
Fig. 2 is a flowchart illustrating a method for completing called number completion according to an embodiment of the present invention.
Fig. 3 is a flowchart illustrating a method for completing called number completion according to another embodiment of the present invention.
Fig. 4 is a flowchart illustrating a method for completing called number completion according to another embodiment of the present invention.
Fig. 5 is a flowchart illustrating a method for completing called number completion according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an embodiment of the Vo L TE terminal for implementing called number completion according to the present invention.
Fig. 7 is a schematic structural diagram of a base station for implementing called number completion according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a system for implementing called number completion according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Fig. 2 is a flowchart illustrating a method for completing called number completion according to an embodiment of the present invention. The method comprises the following steps:
in step 210, the country code and area code to which the Vo L TE terminal currently accesses the cell are obtained through the broadcasted system information.
For example, after the Vo L TE terminal is turned on/regains coverage/handover, it completes cell search, gets downlink synchronization, and then receives the system information broadcasted by E-UTRAN, Vo L TE receives the system information block SIB1 information, extracts Country Code and Area Code from the Country Code (Country Code) cell and Area Code (Area Code) cell, and compares the received Country Code and Area Code with the original Country Code and Area Code stored locally, and updates when there is a change, and does not change when there is no change.
Among them, system information broadcasting is an important function in L TE system, and is to broadcast system messages of E-UTRAN to terminals in a cell, so that the terminals can establish radio connection with a network by obtaining enough incoming information.
The system information is information at a cell level, which indicates some characteristics of a current cell or network and some common characteristics of users, regardless of a specific user. The system can identify the coverage area of the cell and give information of a specific channel by broadcasting corresponding system information in the cell, and the terminal can obtain some basic characteristics of the current network and the cell by receiving the cell system information. The system information is organized in system information blocks, SIBs, each SIB containing a set of parameters related to a certain function. The types of the SIB include 1 Master Information Block (MIB) and multiple SIBs, where MIB messages are broadcast on a Physical Broadcast Channel (PBCH), and the SIBs are issued by Radio Resource Control (RRC) messages of a Physical Downlink Shared Channel (PDSCH). The SIB1 is carried by a "SystemInformation Block Type 1" message, and the SIB2 and other SIBs are carried by a "SystemInformation (SI)" message.
The SIB1 carried in the System Information Block Type1 message is the most important System message except for the MIB, and includes Information required for UE cell access and scheduling Information of other SIBs. Main Information Elements (IE) of SIB1 include:
(1) a Cell access related information (Cell access related information) class, including:
public land Mobile Network (Public L and Mobile Network, P L MN) identification number P L MNIdentity of a Network, comprising a Mobile Country Code (MCC) and a Mobile Network Code (MNC), wherein resources of the MCC are uniformly distributed and managed by International Telecommunication Union (ITU), uniquely identify a country to which a Mobile subscriber belongs, 3 digits in total, and 460 in china.
(2) Tracking Area code tac (tracking Area code) class, which includes Cell id (Cell identity) and Cell Barred status (Cell Barred), indicates whether a user can camp on a Cell.
(3) Cell Selection information class (Cell Selection Info) indicating the minimum received power RSRP value that the Cell Selection accepts.
(4) The Scheduling Information class (Scheduling Information) indicates the transmission time and period of other SIBs.
The invention expands IE in SIB1, adds Country Code cell and Area Code cell in the relative information of cell access, wherein Country Code cell represents the Country Code of the current access cell, and Area Code cell represents the Area Code of the current access cell, thus obtaining the information of Country Code and Area Code in real time by system information broadcast when Vo L TE terminal is started to access, re-enters coverage or switches.
Under the condition that the country code and the area code are changed due to bit increasing or adjustment, the E-UTRAN initiates area code information updating through system information broadcasting, so that a user can obtain the updated country code and area code information in time.
In step 220, when the Vo L TE terminal dials, the called number is complemented to a global number format according to the country code and area code of the current access cell.
And the called number is complemented into a global number format according to the country code and the area code of the current access cell. The specific rule is as follows:
1) the called number in the Request URI is a local number, and the Vo L TE terminal complements the country code and area code.
2) The called number in the Request URI is net number + H0H1H2H3+ ABCD, VO L TE terminal complements the country code.
3) The called number in the Request URI is the domestic long distance prefix (0) + area code + local number or the domestic long distance prefix (0) + network number + H0H1H2H3+ ABCD, VO L TE terminal removes domestic long distance prefix and complements the country code.
At step 230, the Vo L TE terminal sends a call request to the called number in a global number format to route the called number to the home network.
In the embodiment, the country code and the area code of the current access cell of the Vo L TE terminal are transmitted to the terminal through the expanded system broadcast information, when the Vo L TE terminal dials, the called number is complemented into a global number format according to the country code and the area code of the current access cell, and the Vo L TE terminal sends a call request to the called number in the global number format so as to route the called number to the home network, thereby ensuring the correct connection of the Vo L TE terminal call, especially the roaming call, on the premise of not changing the IMS networking mode of an operator.
In addition, the invention does not need to deploy new network elements, saves equipment cost, reduces data configuration, shortens a call routing path, reduces the whole call delay of the Vo L TE terminal, ensures that the terminal can obtain the country code and the area code of an access place, particularly a roaming place in real time, thereby realizing the correct completion of the called number in the local number format under the roaming call scene, and has no special requirements on the equipment networking mode of an operator, particularly the access network elements such as BAC, P-CSCF and the like.
Fig. 3 is a flowchart illustrating a method for completing called number completion according to another embodiment of the present invention. The method comprises the following steps:
in step 310, a country code cell and an area code cell are set in the system information block, and the country code and the area code to which the current access cell belongs are broadcast to the Vo L TE terminal.
The eNodeB configures the information of Country Code and Area Code corresponding to the local cell, and broadcasts the information of Country Code and Area Code to the Vo L TE terminal in the cell in the expanded system message broadcast SIB1, so that the terminal can establish wireless connection with the network by obtaining enough entering information, when the Area Code changes due to the rise or adjustment, the eNodeB updates the Area Code information and informs the terminal by updating the system message, for example, after the Vo L TE terminal is turned on/reacquires coverage/handover, the cell search is completed, downlink synchronization is obtained, then the system information broadcasted by E-UTRAN is received, the Vo L TE receives the SIB1 information, the Country Code and the Area Code are extracted from the cell of the Country Code and the cell of the Area Code, and the currently received Country Code and Area Code are compared with the original Country Code and Area Code stored locally, and are updated when the cell is changed, and the cell of the Area Code is not changed.
Among them, system information broadcasting is an important function in L TE system, and is to broadcast system messages of E-UTRAN to terminals in a cell, so that the terminals can establish radio connection with a network by obtaining enough incoming information.
The system information is information at a cell level, which indicates some characteristics of a current cell or network and some common characteristics of users, regardless of a specific user. The system can identify the coverage area of the cell and give information of a specific channel by broadcasting corresponding system information in the cell, and the terminal can obtain some basic characteristics of the current network and the cell by receiving the cell system information. The System Information is organized in System Information Blocks (SIBs), each SIB containing a set of parameters related to a certain function. The types of the SIB include 1 Master Information Block (MIB) and multiple SIBs, where MIB messages are broadcast on a Physical Broadcast Channel (PBCH), and the SIBs are issued by Radio Resource Control (RRC) messages of a Physical Downlink Shared Channel (PDSCH). The SIB1 is carried by a "SystemInformationBlock Type 1" message, and the SIB2 and other SIBs are carried by a "SystemInformationBlockType 1" message.
The SIB1 carried in the System Information Block Type1 message is the most important System message except for the MIB, and includes Information required for UE cell access and scheduling Information of other SIBs. Main Information Elements (IE) of SIB1 include:
(1) a Cell access related information (Cell access related information) class, including:
public land Mobile Network (Public L and Mobile Network, P L MN) identification number P L MNIdentity of a Network, comprising a Mobile Country Code (MCC) and a Mobile Network Code (MNC), wherein resources of the MCC are uniformly distributed and managed by International Telecommunication Union (ITU), uniquely identify a country to which a Mobile subscriber belongs, 3 digits in total, and 460 in china.
(2) Tracking Area code tac (tracking Area code) class, which includes Cell id (Cell identity) and Cell Barred status (Cell Barred), indicates whether a user can camp on a Cell.
(3) Cell Selection information class (Cell Selection Info) indicating the minimum received power RSRP value that the Cell Selection accepts.
(4) The Scheduling Information class (Scheduling Information) indicates the transmission time and period of other SIBs.
The invention expands IE in SIB1, adds Country Code CountryCode cell and Area Code cell in the relative information of cell access, wherein CountryCode cell represents the Country Code of the current access cell, Area Code cell represents the Area Code of the current access cell, thereby obtaining the information of Country Code and Area Code through system information broadcast when Vo L TE terminal is started to access, re-enters coverage or switches.
At step 320, a request is received for the Vo L TE terminal to call the called number in a global number format that includes the country code and area number to which the current access cell belongs, and route the called number to the home network.
And the called number is complemented into a global number format according to the country code and the area code of the current access cell. The specific rule is as follows:
1) the called number in the Request URI is a local number, and the Vo L TE terminal complements the country code and area code.
2) The called number in the Request URI is net number + H0H1H2H3+ ABCD, VO L TE terminal complements the country code.
3) The called number in the Request URI is the domestic long distance prefix (0) + area code + local number or the domestic long distance prefix (0) + network number + H0H1H2H3+ ABCD, VO L TE terminal removes domestic long distance prefix and complements the country code.
In the embodiment, a country code cell and an area code cell are set in a system information block, a country code and an area code which a current access cell belongs to are broadcasted to a Vo L TE terminal, a request that the Vo L TE terminal calls a called number in a global number format is received, the global number format comprises the country code and the area code which the current access cell belongs to, and the called number is routed to a home network.
In addition, the invention does not need to deploy new network elements, saves equipment cost, reduces data configuration, shortens a call routing path, reduces the whole call delay of the Vo L TE terminal, ensures that the terminal can obtain the country code and the area code of an access place, particularly a roaming place in real time, thereby realizing the correct completion of the called number in the local number format under the roaming call scene, and has no special requirements on the equipment networking mode of an operator, particularly the access network elements such as BAC, P-CSCF and the like.
Fig. 4 is a flowchart illustrating a method for completing called number completion according to another embodiment of the present invention. The method comprises the following steps:
in step 410, a country code cell and an area code cell are set in the system information block and broadcast to the Vo L TE terminal.
The eNodeB configures the information of the country code and the area code corresponding to the cell, carries the information of the country code and the area code in the expanded system message broadcast SIB1, and broadcasts the information to the Vo L TE terminal in the cell, so that the terminal establishes wireless connection with the network by obtaining enough incoming information.
In step 420, the Vo L TE terminal obtains the country code and area code to which the Vo L TE terminal currently accesses the cell through the broadcasted system information.
When Vo L TE terminal receives SIB1 information, it extracts Country Code and Area Code from Country Code cell and Area Code cell respectively.
In step 430, it is determined whether the obtained country code and area code of the current access cell are the same as the country code and area code that have been locally stored, if so, step 440 is executed, otherwise, step 450 is executed.
At step 440, the current country code and area code information is maintained.
At step 450, the country code and area code information is updated.
When the Vo L TE terminal dials, the called number is complemented to a global number format according to the country code and area code to which the current access cell belongs, step 460.
The specific rule is as follows:
1) the called number in the Request URI is a local number, and the Vo L TE terminal complements the country code and area code.
2) If the called number in the Request URI is net number + H0H1H2H3+ ABCD, the VO L TE terminal complements the country code.
3) The called number in the Request URI is the domestic long distance prefix (0) + area code + local number or the domestic long distance prefix (0) + network number + H0H1H2H3+ ABCD, VO L TE terminal removes domestic long distance prefix and complements the country code.
At step 470, the Vo L TE terminal sends a call request to the called number in a global number format to route the called number to the home network.
When a user dials to initiate a call, the called number is completed according to different rules and the number format dialed by the user based on the locally stored country code and area code information, and the called number is routed to the home network.
Fig. 5 is a flowchart illustrating a method for completing called number completion according to an embodiment of the present invention.
When the Shanghai Vo L TE terminal roams into a junior:
in step 501, after the Vo L TE terminal is powered on, the cell search is completed, and downlink synchronization is obtained with the cell.
In step 502, the E-UTRAN sends a Master information Block MIB.
In step 503, the E-UTRAN transmits a system information block SIB1, wherein the information element IE of SIB1 carries the Country Code and the Area Code.
At step 504, the Vo L TE terminal extracts the country code and area code and stores it locally.
In step 505, the E-UTRAN transmits a system information block SIB.
At step 506, the RRC establishes a connection and the Vo L TE terminal initiates and completes L TE network attachment.
In step 507, the Vo L TE terminal initiates IMS APN bearer establishment.
The Vo L TE terminal completes authentication and registration in the IMS network in step 508.
In step 509 plus 510, the user dials 38080018 to initiate a call, and the Vo L TE terminal completes the called number by complementing the country code and area code, and then sends a call request with the called number in the format of global number after completing the complementing.
And 511-513, the call is routed to the home network, the home S-CSCF directly queries call number mapping (ENUM) to carry out called addressing routing, and the call is routed to a Chengdu (028)38080018 user.
When Vo L TE terminal moves from Chengdu to Deyang:
and 514-516, in the process of boundary switching, receiving a system message broadcast issued by the E-UTRAN in Germany, analyzing and comparing by the terminal, and updating the locally stored country code and area code.
517 ~ 518, the user dials 38080018 and initiates the call, Vo L TE terminal completes the called number, the completion method is to complement the country code and area code, and after completion, the call request of the called party in the format of global number is sent.
Step 519 ~ 521, the call is routed to the home network, the home S-CSCF directly queries the electric ENUM to perform the called addressing routing, and the call is routed to the Deyang (0838)38080018 user.
Fig. 6 is a schematic structural diagram of an embodiment of a Vo L TE terminal for implementing called number completion according to the present invention, the Vo L TE terminal includes an obtaining module 610, a number completion module 620 and a calling module 630, wherein:
the obtaining module 610 is configured to obtain, through the broadcasted system information, a country code and an area code to which the Vo L TE terminal currently accesses the cell.
For example, Vo L TE terminal boots up/reacquires coverage/handover, completes cell search, acquires downlink synchronization, and then the acquisition module 610 receives system information broadcasted by E-UTRAN, Vo L TE receives system information block SIB1 information, extracts Country Code and Area Code from Country Code (Country Code) cell and Area Code (Area Code) cell, respectively, and compares the received Country Code and Area Code with the original Country Code and Area Code stored locally, updates when there is a change, and does not change when there is no change.
Among them, system information broadcasting is an important function in L TE system, and is to broadcast system messages of E-UTRAN to terminals in a cell, so that the terminals can establish radio connection with a network by obtaining enough incoming information.
The system information is information at a cell level, which indicates some characteristics of a current cell or network and some common characteristics of users, regardless of a specific user. The system can identify the coverage area of the cell and give information of a specific channel by broadcasting corresponding system information in the cell, and the terminal can obtain some basic characteristics of the current network and the cell by receiving the cell system information. The system information is organized in system information blocks, SIBs, each SIB containing a set of parameters related to a certain function. The types of the SIB include 1 Master Information Block (MIB) and multiple SIBs, where MIB messages are broadcast on a Physical Broadcast Channel (PBCH), and the SIBs are issued by Radio Resource Control (RRC) messages of a Physical Downlink Shared Channel (PDSCH). The SIB1 is carried by a "SystemInformation Block Type 1" message, and the SIB2 and other SIBs are carried by a "SystemInformation (SI)" message.
The SIB1 carried in the System Information Block Type1 message is the most important System message except for the MIB, and includes Information required for UE cell access and scheduling Information of other SIBs. Main Information Elements (IE) of SIB1 include:
(1) a Cell access related information (Cell access related information) class, including:
public land Mobile Network (Public L and Mobile Network, P L MN) identification number P L MNIdentity of a Network, comprising a Mobile Country Code (MCC) and a Mobile Network Code (MNC), wherein resources of the MCC are uniformly distributed and managed by International Telecommunication Union (ITU), uniquely identify a country to which a Mobile subscriber belongs, 3 digits in total, and 460 in china.
(2) Tracking Area code tac (tracking Area code) class, which includes Cell id (Cell identity) and Cell Barred status (Cell Barred), indicates whether a user can camp on a Cell.
(3) Cell Selection information class (Cell Selection Info) indicating the minimum received power RSRP value that the Cell Selection accepts.
(4) The Scheduling Information class (Scheduling Information) indicates the transmission time and period of other SIBs.
The invention expands IE in SIB1, adds Country Code cell and Area Code cell in the relative information of cell access, wherein Country Code cell represents the Country Code of the current access cell, and Area Code cell represents the Area Code of the current access cell, thus obtaining the information of Country Code and Area Code in real time by system information broadcast when Vo L TE terminal is started to access, re-enters coverage or switches.
Under the condition that the country code and the area code are changed due to bit increasing or adjustment, the E-UTRAN initiates area code information updating through system information broadcasting, so that a user can obtain the updated country code and area code information in time.
And a number completion module 620, configured to, when the Vo L TE terminal dials, complete the called number into a global number format according to the country code and area code of the current access cell.
The number completion module 620 completes the called number into a global number format according to the country code and area code of the current access cell. The specific rule is as follows:
1) the called number in the Request URI is a local number, and the Vo L TE terminal complements the country code and area code.
2) The called number in the Request URI is net number + H0H1H2H3+ ABCD, VO L TE terminal complements the country code.
3) The called number in the Request URI is the domestic long distance prefix (0) + area code + local number or the domestic long distance prefix (0) + network number + H0H1H2H3+ ABCD, VO L TE terminal removes domestic long distance prefix and complements the country code.
A called module 630, configured to send a call request to the called number in a global number format, so that the called number is routed to the home network.
In the embodiment, the country code and the area code of the current access cell of the Vo L TE terminal are transmitted to the terminal through the expanded system broadcast information, when the Vo L TE terminal dials, the called number is complemented into a global number format according to the country code and the area code of the current access cell, and the Vo L TE terminal sends a call request to the called number in the global number format so as to route the called number to the home network, thereby ensuring the correct connection of the Vo L TE terminal call, especially the roaming call, on the premise of not changing the IMS networking mode of an operator.
In addition, the invention does not need to deploy new network elements, saves equipment cost, reduces data configuration, shortens a call routing path, reduces the whole call delay of the Vo L TE terminal, ensures that the terminal can obtain the country code and the area code of an access place, particularly a roaming place in real time, thereby realizing the correct completion of the called number in the local number format under the roaming call scene, and has no special requirements on the equipment networking mode of an operator, particularly the access network elements such as BAC, P-CSCF and the like.
Fig. 7 is a schematic structural diagram of a base station for implementing called number completion according to an embodiment of the present invention. The base station includes a setup module 710, a broadcast module 720, and a routing module 730. Wherein:
a setting module 710, configured to set a country code cell and an area code cell in the system information block.
And a broadcasting module 720, configured to broadcast, to the Vo L TE terminal, the country code and the area code to which the current access cell belongs.
The eNodeB configures the information of Country Code and Area Code corresponding to the local cell, and broadcasts the information of Country Code and Area Code to the Vo L TE terminal in the cell in the expanded system message broadcast SIB1, so that the terminal can establish wireless connection with the network by obtaining enough incoming information, the eNodeB updates the Area Code information when the Area Code changes due to the rise or adjustment, and notifies the terminal by updating the system message, for example, the Vo L TE terminal is turned on/reacquires coverage/handover, completes cell search, acquires downlink synchronization, and receives the system information broadcasted by E-UTRAN, the Country L TE receives the SIB1 information, extracts the Country Code and Area Code from the cell of the Country Code and Area Code, and compares the currently received Country Code and Area Code with the original Country Code and Area Code stored locally, and updates the Country Code and Area Code when the cell changes, and does not update the Country Code and Area Code when the cell does not change.
Among them, system information broadcasting is an important function in L TE system, and is to broadcast system messages of E-UTRAN to terminals in a cell, so that the terminals can establish radio connection with a network by obtaining enough incoming information.
The system information is information at a cell level, which indicates some characteristics of a current cell or network and some common characteristics of users, regardless of a specific user. The system can identify the coverage area of the cell and give information of a specific channel by broadcasting corresponding system information in the cell, and the terminal can obtain some basic characteristics of the current network and the cell by receiving the cell system information. The System Information is organized in System Information Blocks (SIBs), each SIB containing a set of parameters related to a certain function. The types of the SIB include 1 Master Information Block (MIB) and multiple SIBs, where MIB messages are broadcast on a Physical Broadcast Channel (PBCH), and the SIBs are issued by Radio Resource Control (RRC) messages of a Physical Downlink Shared Channel (PDSCH). The SIB1 is carried by a "SystemInformationBlock Type 1" message, and the SIB2 and other SIBs are carried by a "SystemInformationBlockType 1" message.
The SIB1 carried in the System Information Block Type1 message is the most important System message except for the MIB, and includes Information required for UE cell access and scheduling Information of other SIBs. Main Information Elements (IE) of SIB1 include:
(1) a Cell access related information (Cell access related information) class, including:
public land Mobile Network (Public L and Mobile Network, P L MN) identification number P L MNIdentity of a Network, comprising a Mobile Country Code (MCC) and a Mobile Network Code (MNC), wherein resources of the MCC are uniformly distributed and managed by International Telecommunication Union (ITU), uniquely identify a country to which a Mobile subscriber belongs, 3 digits in total, and 460 in china.
(2) Tracking Area code tac (tracking Area code) class, which includes Cell id (Cell identity) and Cell Barred status (Cell Barred), indicates whether a user can camp on a Cell.
(3) Cell Selection information class (Cell Selection Info) indicating the minimum received power RSRP value that the Cell Selection accepts.
(4) The Scheduling Information class (Scheduling Information) indicates the transmission time and period of other SIBs.
The invention expands IE in SIB1, adds Country Code CountryCode cell and Area Code cell in the relative information of cell access, wherein CountryCode cell represents the Country Code of the current access cell, Area Code cell represents the Area Code of the current access cell, thereby obtaining the information of Country Code and Area Code through system information broadcast when Vo L TE terminal is started to access, re-enters coverage or switches.
And a routing module 730, configured to receive a request from the Vo L TE terminal to call the called number in a global number format, where the global number format includes a country code and an area code to which the current access cell belongs, and route the called number to the home network.
And the called number is complemented into a global number format according to the country code and the area code of the current access cell. The specific rule is as follows:
1) the called number in the Request URI is a local number, and the Vo L TE terminal complements the country code and area code.
2) The called number in the Request URI is net number + H0H1H2H3+ ABCD, VO L TE terminal complements the country code.
3) The called number in the Request URI is the domestic long distance prefix (0) + area code + local number or the domestic long distance prefix (0) + network number + H0H1H2H3+ ABCD, VO L TE terminal removes domestic long distance prefix and complements the country code.
In the embodiment, a country code cell and an area code cell are set in a system information block, a country code and an area code which a current access cell belongs to are broadcasted to a Vo L TE terminal, a request that the Vo L TE terminal calls a called number in a global number format is received, the global number format comprises the country code and the area code which the current access cell belongs to, and the called number is routed to a home network.
In addition, the invention does not need to deploy new network elements, saves equipment cost, reduces data configuration, shortens a call routing path, reduces the whole call delay of the Vo L TE terminal, ensures that the terminal can obtain the country code and the area code of an access place, particularly a roaming place in real time, thereby realizing the correct completion of the called number in the local number format under the roaming call scene, and has no special requirements on the equipment networking mode of an operator, particularly the access network elements such as BAC, P-CSCF and the like.
Fig. 8 is a schematic structural diagram of an embodiment of a system for implementing called number completion according to the present invention, the system includes a Vo L TE terminal 810 and a base station 820, wherein the Vo L TE terminal 810 includes an obtaining module 610, a number completion module 620 and a calling module 630, and the base station 820 includes a setting module 710, a broadcasting module 720 and a routing module 730.
When a user dials to initiate a call, the called number is completed according to different rules and the number format dialed by the user based on the locally stored country code and area code information, and the called number is routed to the home network.
Thus far, the present invention has been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The method and apparatus of the present invention may be implemented in a number of ways. For example, the methods and apparatus of the present invention may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustrative purposes only, and the steps of the method of the present invention are not limited to the order specifically described above unless specifically indicated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as a program recorded in a recording medium, the program including machine-readable instructions for implementing a method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A method for realizing called number completion is characterized by comprising the following steps:
acquiring a country code and an area code to which a Vo L TE terminal is currently accessed to a cell through broadcasted system information, wherein a country code cell and an area code cell are added in a system information block 1 of the system information, the country code is extracted from the country code cell, and the area code is extracted from the area code cell;
when the Vo L TE terminal dials, complementing a called number into a global number format according to a country code and an area code to which the current access cell belongs, wherein if the called number is a local number, the country code and the area code are complemented in the called number, if the called number is a mobile number, the country code is complemented in the called number, and if the called number contains a long distance prefix, deleting the long distance prefix of the called number and complementing the country code;
the Vo L TE terminal sends a call request to the called number in a global number format to route the called number to the home network.
2. The method for realizing called number completion according to claim 1, comprising:
after acquiring the country code and area code of the current access cell, the Vo L TE terminal compares the country code and area code with the country code and area code stored locally;
if the country code and the area code of the current access cell are different from the country code and the area code which are locally stored, updating the information of the country code and the area code;
otherwise, the current country code and area code information is maintained.
3. A method for realizing called number completion is characterized by comprising the following steps:
setting a country code cell and an area code cell in a system information block 1, and broadcasting a country code and an area code to which a current access cell belongs to a Vo L TE terminal, wherein the country code cell comprises a country code, and the area code cell comprises an area code;
receiving a request of the Vo L TE terminal for calling a called number in a global number format, wherein the global number format comprises a country code and an area code to which a current access cell belongs, and routing the called number to a home network;
if the Vo L TE terminal determines that the called number is a local number, then a country code and an area code are complemented in the called number, if the called number is a mobile number, then a country code is complemented in the called number, and if the called number contains a long-distance prefix, then the long-distance prefix of the called number is deleted and the country code is complemented.
4. The method for realizing called number completion according to claim 3, comprising:
and after the country code cell and the area code cell of the system information block 1 are updated, broadcasting the updated country code and area code information to the Vo L TE terminal.
5. A method for realizing called number completion is characterized by comprising the following steps:
setting a country code cell and an area code cell in a system information block 1, and broadcasting a country code and an area code to a Vo L TE terminal, wherein the country code cell comprises a country code, and the area code cell comprises an area code;
the Vo L TE terminal obtains the country code and area code of the Vo L TE terminal currently accessed to the cell through the broadcasted system information, extracts the country code from the country code cell, and extracts the area code from the area code cell;
when the Vo L TE terminal dials, complementing a called number into a global number format according to a country code and an area code to which the current access cell belongs, wherein if the called number is a local number, the country code and the area code are complemented in the called number, if the called number is a mobile number, the country code is complemented in the called number, and if the called number contains a long distance prefix, deleting the long distance prefix of the called number and complementing the country code;
the Vo L TE terminal sends a call request to the called number in a global number format to route the called number to the home network.
6. The method for realizing called number completion according to claim 5, comprising:
after acquiring the country code and area code of the current access cell, the Vo L TE terminal compares the country code and area code with the country code and area code stored locally;
if the country code and the area code of the current access cell are different from the country code and the area code which are locally stored, updating the information of the country code and the area code;
otherwise, the current country code and area code information is maintained.
7. A Vo L TE terminal for implementing called number completion, comprising:
an obtaining module, configured to obtain, through broadcasted system information, a country code and an area code to which a Vo L TE terminal currently accesses a cell, where a country code cell and an area code cell are added to a system information block 1 of the system information, a country code is extracted from the country code cell, and an area code is extracted from the area code cell;
a number completion module, configured to complete a called number into a global number format according to a country code and an area code to which the current access cell belongs when the Vo L TE terminal dials, where if the called number is a local number, the called number is complemented with the country code and the area code;
and the calling module is used for sending a calling request to the called number in a global number format so as to route the called number to a home network.
8. The Vo L TE terminal for realizing called number completion according to claim 7, comprising:
the obtaining module is used for comparing the country code and the area code which the Vo L TE terminal belongs to with the country code and the area code which are locally stored after the Vo L TE terminal obtains the country code and the area code which the current access cell belongs to, if the country code and the area code which the current access cell belongs to are different from the country code and the area code which are locally stored, updating the information of the country code and the area code, otherwise, keeping the information of the current country code and the area code.
9. A base station for realizing called number completion is characterized by comprising:
a setting module, configured to set a country code cell and an area code cell in a system information block 1, where the country code cell includes a country code and the area code cell includes an area code;
the broadcasting module is used for broadcasting the country code and the area code of the current access cell to the Vo L TE terminal;
the routing module is used for receiving a request that the Vo L TE terminal calls a called number in a global number format, wherein the global number format comprises a country code and an area code to which a current access cell belongs, and routing the called number to a home network;
the Vo L TE terminal complements a country code and an area code in the called number if the called number is determined to be a local number, complements a country code in the called number if the called number is a mobile number, and deletes a long-distance prefix of the called number and complements the country code if the called number contains the long-distance prefix.
10. The base station for realizing called number completion according to claim 9, comprising:
and the broadcasting module is used for broadcasting the updated country code and area code information to the Vo L TE terminal after updating the country code cell and the area code cell of the system information block 1.
11. A system for implementing called number completion, comprising the Vo L TE terminal of any one of claims 7-8 and the base station of claim 9 or 10.
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| CN109769242B (en) * | 2017-11-09 | 2022-04-19 | 中国电信股份有限公司 | Communication method, system, MMTel and computer readable storage medium |
| CN109788448B (en) * | 2017-11-14 | 2021-08-17 | 中国电信股份有限公司 | Service number partition tandem implementation method and system |
| CN109246623B (en) * | 2018-08-31 | 2020-05-22 | 长沙炫笔记通信科技有限公司 | Communication number completion method, device and storage medium |
| CN111479003A (en) * | 2020-04-01 | 2020-07-31 | 惠州Tcl移动通信有限公司 | Emergency number dialing method, device, storage medium and mobile terminal |
| CN113645343B (en) * | 2020-04-23 | 2022-08-09 | 深圳市万普拉斯科技有限公司 | Number completion method and device, computer equipment and storage medium |
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