CN102075916A - Method, system and mobile terminal for updating concatenated preferred roaming list - Google Patents

Abstract

The present invention discloses a method and system for updating a link preferred roaming list and a mobile terminal. The system includes an air interface parameter management entity and a mobile terminal. The mobile terminal sends an updated link preference roaming list. The present invention enables CPRL to be updated to the terminal through OTAF by extending the PRL parameters in the 683C protocol, improves system performance and user experience, does not involve the modification of message interaction, and reduces the network element transformation cost of updating CPRL through OTAF .

Description

A method and system for updating link preference roaming list and mobile terminal

technical field

The invention relates to a management technology of a roaming list of a terminal in the communication field, in particular to a method and a system for updating a roaming list of preferred links and a mobile terminal.

Background technique

In the Code-Division Multiple Access (CDMA) system, the Preferred Roaming List (PRL) is stored in the mobile terminal or the User Identity Model (UIM) card. To help the mobile terminal obtain a list file of the system to realize the roaming function. The preferred roaming list is created by the operator and is responsible for updating by the operator, and is not readable to the user. The 3GPP2 683C protocol defines two types of PRL: 1) 683A PRL, 2) 683C PRL.

The Over-the-Air Service Provisioning Function (OTAF) is a network element entity in the CDMA core network system. It has two main functions: 1) Over-the-Air Service Provisioning Function (OTASP); 2) Parameter Management (OTAPA) , both of these two functions involve updating the PRL of the terminal, and the function implementation of OTAF follows the 683C protocol.

Since 683C PRL is a PRL generated to support the EVDO (Evolution, Data Only) function, if a UIM card storing 683C PRL is put into a terminal that only supports 683A PRL, it will fail to read the PRL list and cause the service to be unavailable . In order to solve this problem, a new type of link preferred roaming list (CPRL, Concatenated Preferred Roaming List) structure has appeared, including three parts, 683A PRL part, 683C PRL part, and the verification part of 683A PRL part and 683C PRL part (to prevent data from being tampered with). The 683A terminal can only read the 683A PRL part, and the 683C terminal (EVDO) can read the 683C PRL part. When the UIM card storing CPRL is placed on a terminal that supports 683A PRL, the terminal will only read the part of 683APRL for roaming; when the UIM card is placed on a terminal that supports 683C PRL, the terminal will preferentially read the part of 683C PRL. If it succeeds, use 683C PRL for roaming, if reading part of 683C PRL fails, continue to read 683A PRL.

CPRL is not defined in the 683C protocol, so the CPRL cannot be updated to the mobile terminal through the air number allocation and air parameter management functions of OTAF.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method, system and mobile terminal for updating link preference roaming list, so as to improve system performance and user experience.

In order to solve the above technical problems, the present invention provides a method for updating a preferred link roaming list of a terminal, comprising: after the air interface parameter management entity knows that the mobile terminal supports the preferred link roaming list, it sends an updated link preferred roaming list to the mobile terminal.

Further, the above method also has the following characteristics:

The process for the air interface parameter management entity to know that the mobile terminal supports the link preferred roaming list specifically includes: the air interface parameter management entity sends a protocol capability request message to the mobile terminal, and the mobile terminal returns the protocol capability request message to the air interface parameter management entity The System Supported Roaming List Type field in the response message indicates that the linked preferred roaming list is supported.

Further, the above method also has the following characteristics:

After the air interface parameter management entity knows that the mobile terminal supports the preferred roaming list, it sends an updated preferred roaming list to the mobile terminal through a preferred roaming list update message, and the system supports roaming in the preferred roaming list update message. The list type field indicates that the link preferred roaming list is supported, and the system roaming list type data identification field indicates that this update is an update of the link preferred roaming list.

Further, the above method also has the following characteristics:

After the air interface parameter management entity learns that the mobile terminal does not support the link preferred roaming list, when it is judged that the system needs to forcibly deliver the link preferred roaming list, the updated link preferred roaming list is forcibly issued to the mobile terminal through the preferred roaming list update message , and the system support roaming list type field in this preferred roaming list update message indicates that the linked preferred roaming list is supported, and the system roaming list type data identification field indicates that this update is an update of the linked preferred roaming list.

Further, the above method also has the following characteristics:

After the air interface parameter management entity learns that the mobile terminal does not support linking to the preferred roaming list, and determines that the system does not need to force the link to the preferred roaming list, it sends the updated preferred roaming list to the mobile terminal through a preferred roaming list update message.

In order to solve the above-mentioned technical problems, the present invention provides a system for updating the preferred roaming list of terminal links, including an air interface parameter management entity and a mobile terminal, and the air interface parameter management entity is used to send to The mobile terminal sends an updated link preference roaming list.

Furthermore, the above system also has the following characteristics:

The mobile terminal is configured to, after receiving the protocol capability request message sent by the air interface parameter management entity when supporting the link preferred roaming list, return the system support roaming in the protocol capability response message to the air interface parameter management entity Support for linked preferred roaming lists is indicated in the List Type field.

Furthermore, the above system also has the following characteristics:

The air interface parameter management entity is also configured to send an updated preferred roaming list to the mobile terminal through a preferred roaming list update message after learning that the mobile terminal supports the linked preferred roaming list, and in the preferred roaming list update message The system support roaming list type field indicates that the link preferred roaming list is supported, and the system roaming list type data identification field indicates that this update is an update of the link preferred roaming list.

Furthermore, the above system also has the following characteristics:

The air interface parameter management entity is also used to forcibly issue the updated preferred roaming list to the mobile terminal through a preferred roaming list update message when it is determined that the system needs to forcibly deliver the preferred roaming list after learning that the mobile terminal does not support the linked preferred roaming list. Link to the preferred roaming list, and indicate that the system supports the preferred roaming list in the system support roaming list type field in this preferred roaming list update message, and indicate that this update is an update to the linked preferred roaming list in the system roaming list type data identification field .

In order to solve the above technical problems, the present invention provides a mobile terminal for updating the preferred roaming list of terminal links. The mobile terminal is used to notify the air interface parameter management entity that the mobile terminal supports the preferred roaming list of links. Specifically, upon receiving the After the protocol capability request message of the air interface parameter management entity, the support link preferred roaming list is indicated in the system support roaming list type field in the protocol capability response message returned to the air interface parameter management entity.

The present invention enables CPRL to be updated to the terminal through OTAF by extending the PRL parameters in the 683C protocol, improving system performance and user experience, and does not involve modification of message interaction, mobile switching center (MSC), broadband service controller ( BSC) does not need to be modified, which greatly reduces the cost of network element transformation for updating CPRL through OTAF.

Description of drawings

Fig. 1 is a structural diagram of a system for updating a preferred roaming list of terminal links in an embodiment;

Fig. 2 is a flow chart of a method for updating a preferred roaming list of terminal links in an embodiment;

Fig. 3 is a flow chart of a method for updating a preferred roaming list of terminal links in a specific embodiment.

Detailed ways

As shown in FIG. 1 , the system for updating the preferred roaming list of terminal links includes a mobile terminal and an air interface parameter management entity.

The mobile terminal is used to notify the air interface parameter management entity that the mobile terminal supports the link preferred roaming list. Specifically, after receiving the protocol capability request message from the air interface parameter management entity, the system in the protocol capability response message returned to the air interface parameter management entity The support link preferred roaming list is indicated in the supported roaming list type field.

The mobile terminal is further configured to save the data for updating the preferred link roaming list after receiving a preferred roaming list update message forcibly issued by the air interface parameter management entity instructing to update the linked preferred roaming list when the linked preferred roaming list is not supported.

The air interface parameter management entity is configured to send an updated link preferred roaming list to the mobile terminal after knowing that the mobile terminal supports the link preferred roaming list.

The air interface parameter management entity is also used to forcibly send the updated preferred roaming list to the mobile terminal through the preferred roaming list update message when it is determined that the system needs to forcibly deliver the preferred roaming list after learning that the mobile terminal does not support the linked preferred roaming list , and the System Selection for Preferred Roaming (SSPR_P_REV) field in the preferred roaming list update message indicates that the preferred roaming list supports linking, and indicates this in the system roaming list type data identifier (SSPR BLOCK_ID) field This update is an update to the linked preferred roaming list.

The air interface parameter management entity is also used to send the updated preferred roaming list to the mobile terminal through the preferred roaming list update message when it is determined that the system does not need to force the linked preferred roaming list after learning that the mobile terminal does not support linking the preferred roaming list.

In the above solution, by extending the PRL-related message structure of the 683C protocol, it supports OTAF to update the CPRL to the mobile terminal. The value of the system supported roaming list type (SSPR_P_REV) field in the protocol capability response message sent by the mobile terminal to OTAF and in the preferred roaming list update message sent by OTAF to the mobile terminal is "00000010" to indicate that the linked preferred roaming list is supported. Among them, SSPR_P_REV='00000010' is a reserved field in the 3GPP2683C protocol, and the values from '00000100' to '11111111' are not used, and the present invention can also take a certain value.

The value of the system roaming list type data identifier (SSPR BLOCK_ID) field in the preferred roaming list update message sent by OTAF to the mobile terminal is "00000010" to indicate that this update is an update to the linked preferred roaming list. Among them, SSPR BLOCK_ID="00000010" is a reserved field in the 683C protocol. In the 683C protocol, "00000010" to "01111111" are reserved for new PRL types, and "10000000" to "11111110" are custom PRL types for operators The reserved CPRL can be considered as a new PRL or a PRL customized by the operator, so it can also take any value from "00000010" to "11111110".

As shown in Figure 2, the method for updating the terminal link preferred roaming list includes:

Step 201, the air interface parameter management entity sends a protocol capability request message to the mobile terminal;

Step 202, the mobile terminal indicates in the field of the system supported roaming list type field in the protocol capability response message returned to the air interface parameter management entity that it supports the linked preferred roaming list;

In step 203, the air interface parameter management entity sends an updated preferred link roaming list to the mobile terminal after learning that the mobile terminal supports the preferred link roaming list.

The method for updating the terminal link preferred roaming list through OTAF is described in detail in conjunction with FIG. 3, including the following steps:

Step 301, OTAF initiates an Over-the-Air (OTA) operation, such as Over-the-Air Service Provisioning (OTASP), Over-the-Air Parameter Administration , referred to as OTAPA), to complete the OTA operation start preparation process;

Step 302, OTAF sends a protocol capability request message (Protocol Request) to the Mobile Switching Center (MSC), requesting to know the type of PRL supported by the terminal;

Step 303, the MSC transparently transmits the protocol capability request message to the base station (BS);

Step 304, the BS sends a protocol capability request message to the mobile terminal (MS) through the wireless side;

Step 305, the MS obtains the currently supported protocol, returns a protocol capability response message to the BS; and indicates in the field of the system support roaming list type field in the protocol capability response message that it supports the linked preferred roaming list;

Step 306, the BS forwards the protocol capability response message to the MSC;

Step 307, the MSC forwards the protocol capability response message to the OTAF;

Step 308: When the OTAF knows the CPRL supported by the mobile terminal in the protocol capability response message, it sends a preferred roaming list update message to the mobile terminal, and indicates in the system supported roaming list type field in the preferred roaming list update message that it supports linked preferred roaming. list, indicating that this update is an update to the linked preferred roaming list in the system roaming list type data identifier field.

Step 309, the MSC transparently transmits the preferred roaming list update message to the base station (BS);

Step 310, the BS forwards the preferred roaming list update message to the MS;

Step 311, MS updates the CPRL after receiving the preferred roaming list update message, and returns a response message whether the update is successful to the BS;

Step 312, the BS returns an update response message to the MSC;

Step 313, the MSC transparently transmits the PRL update response message to the OTAF;

In step 314, the OTAF feeds back to the user whether the PRL is successfully updated according to the update response message, and ends the OTA operation.

In the above method, after the air interface parameter management entity learns that the mobile terminal does not support the link preferred roaming list, and judges that the system needs to forcibly issue the link preferred roaming list, it will forcefully issue the updated link preferred roaming list to the mobile terminal through the preferred roaming list update message , and the system support roaming list type field in this preferred roaming list update message indicates that the linked preferred roaming list is supported, and the system roaming list type data identification field indicates that this update is an update of the linked preferred roaming list; it is judged that the system does not When it is necessary to forcibly deliver the linked preferred roaming list, the updated preferred roaming list is delivered to the mobile terminal through a preferred roaming list update message.

Certainly, the present invention can also have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding All changes and deformations should belong to the protection scope of the appended claims of the present invention.

Claims (10)

1. A method for updating terminal link preferred roaming lists, characterized in that, After the air interface parameter management entity knows that the mobile terminal supports the link preferred roaming list, it sends the updated link preferred roaming list to the mobile terminal. 2. The method of claim 1, wherein The process for the air interface parameter management entity to know that the mobile terminal supports the link preferred roaming list specifically includes: the air interface parameter management entity sends a protocol capability request message to the mobile terminal, and the mobile terminal returns the protocol capability request message to the air interface parameter management entity The System Supported Roaming List Type field in the response message indicates that the linked preferred roaming list is supported. 3. The method of claim 1 or 2, wherein, After the air interface parameter management entity knows that the mobile terminal supports the preferred roaming list, it sends an updated preferred roaming list to the mobile terminal through a preferred roaming list update message, and the system supports roaming in the preferred roaming list update message. The list type field indicates that the link preferred roaming list is supported, and the system roaming list type data identification field indicates that this update is an update of the link preferred roaming list. 4. The method of claim 1 or 2, wherein, After the air interface parameter management entity learns that the mobile terminal does not support the link preferred roaming list, when it is judged that the system needs to forcibly deliver the link preferred roaming list, the updated link preferred roaming list is forcibly issued to the mobile terminal through the preferred roaming list update message , and the system support roaming list type field in this preferred roaming list update message indicates that the linked preferred roaming list is supported, and the system roaming list type data identification field indicates that this update is an update of the linked preferred roaming list. 5. The method of claim 1 or 2, wherein, After the air interface parameter management entity learns that the mobile terminal does not support linking to the preferred roaming list, and determines that the system does not need to force the link to the preferred roaming list, it sends the updated preferred roaming list to the mobile terminal through a preferred roaming list update message. 6. A system for updating a preferred roaming list of terminal links, comprising an air interface parameter management entity and a mobile terminal, characterized in that, The air interface parameter management entity is configured to send an updated link preferred roaming list to the mobile terminal after learning that the mobile terminal supports the link preferred roaming list. 7. The system of claim 5, wherein: The mobile terminal is configured to, after receiving the protocol capability request message sent by the air interface parameter management entity when supporting the link preferred roaming list, return the system support roaming in the protocol capability response message to the air interface parameter management entity Support for linked preferred roaming lists is indicated in the List Type field. 8. The system of claim 5 or 6, wherein: The air interface parameter management entity is also configured to send an updated preferred roaming list to the mobile terminal through a preferred roaming list update message after learning that the mobile terminal supports the linked preferred roaming list, and in the preferred roaming list update message The system support roaming list type field indicates that the link preferred roaming list is supported, and the system roaming list type data identification field indicates that this update is an update of the link preferred roaming list. 9. The system of claim 5 or 6, wherein: The air interface parameter management entity is also used to forcibly issue the updated preferred roaming list to the mobile terminal through a preferred roaming list update message when it is determined that the system needs to forcibly deliver the preferred roaming list after learning that the mobile terminal does not support the linked preferred roaming list. Link to the preferred roaming list, and indicate that the system supports the preferred roaming list in the system support roaming list type field in this preferred roaming list update message, and indicate that this update is an update to the linked preferred roaming list in the system roaming list type data identification field . 10. A mobile terminal for updating terminal link preferred roaming list, characterized in that, The mobile terminal is used to notify the air interface parameter management entity that the mobile terminal supports linking to the preferred roaming list. Specifically, after receiving the protocol capability request message from the air interface parameter management entity, the protocol returned to the air interface parameter management entity The System Supported Roaming List Type field in the Capability Response message indicates that the linked preferred roaming list is supported.

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