CN102111904B - The transmission method of cdma base station system and message thereof - Google Patents

Abstract

The invention discloses a CDMA base station system and a message transmission method thereof. The method comprises the following steps: a user terminal switches from a DO AN to a 1x BS under the same packet control function PCF; the PCF sends a message to the DO AN for notifying the user terminal The notification message for establishing and/or releasing the data service in the 1x BS, wherein the notification message for notifying the terminal user to establish the data service in the 1x BS carries the PDSN address information of the packet data service node currently selected by the PCF; DO AN receives The notification message updates locally stored PDSN address information corresponding to the user terminal according to the notification message. The invention solves the problem of abnormal interaction with PDSN when the data service changes between 1xBS and DO AN under the same PCF, and improves the stability of the system.

Description

CDMA Base Station System and Its Message Transmission Method

technical field

The present invention relates to the field of mobile communication, in particular to a code division multiple access (CDMA for short) base station system and a message transmission method thereof.

Background technique

At present, commercial CDMA base station systems (for example, CDMA2000 base station systems) support both CDMA 1x and EVDO data services, and many cells have 1x coverage and DO coverage at the same time. Therefore, in general, a CDMA base station system is not only a 1x access network, which is called a base station (Base Station, BS for short, hereinafter referred to as 1x BS) in the protocol, but also an EVDO access network, which is called an access network (Access Network) in the protocol. Network, referred to as AN, hereinafter referred to as DOAN).

Figure 1 is a schematic diagram of the connection of network elements in a CDMA system according to related technologies, as shown in Figure 1, according to the description in the 3GPP2 protocol specification A.S0008 (AN realizes the Session control function), the packet control function (Packet Control Function, referred to as PCF) , can be connected to 1xBS alone, or DOAN alone, or can be connected to 1xBS and DOAN at the same time.

In the CDMA 1x protocol, the user is called a mobile station (Mobile Station, referred to as MS), in the EVDO protocol, the user is called an access terminal (Access Terminal, referred to as AT), and the access terminal (AT) is used uniformly below to describe.

In order to enable the access terminal to move smoothly between different base stations and maintain continuous data services, it is necessary to perform switching configurations between different CDMA base station systems, and to ensure that different base stations select the same packet data service node (Packet Data Service Node) for users. , referred to as PDSN).

For EVDO, different ANs are switched through interfaces such as A13, A16, and A17. Among them, A13 is dormant handoff (Dormant Handoff), and A16 is active handoff (Active Handoff). Figure 2 is a schematic diagram of an access terminal switching between different CDMA base station systems according to related technologies. As shown in Figure 2, when a terminal user changes data services between 1x BS and DO AN under the same PCF How to deal with it is not described in the existing agreement. However, the inventor found that, in this case, since the source side DOAN cannot save the correct PDSN address, when the user switches to the target side AN (that is, 1x BS), the PDSN address delivered by the A13 and A16 interfaces will be generated. mistake. The specific scenarios are as follows:

1) After the user establishes the data service on the DO AN at the source side, it releases it. For some reason (for example, the DO signal of the cell is lost), the user accesses and performs data services at the source side 1x BS, and the PCF will select a PDSN to establish data services according to the principle of load sharing. At this time, the PDSN address stored in the DO AN on the source side may not be the PDSN address that the user is currently accessing under 1x BS. Therefore, when the user switches to the DOAN on the target side, the PDSN address obtained through A13 and A16 may be wrong, which will cause data service interruption.

2) After the user establishes the data service on the DO AN at the source side, for some reason (for example, the DO signal of some cells is lost), the user will switch to the 1x BS at the source side to perform the data service, and then release it. At this time, the PDSN address should be set to be invalid in the session information of the DO AN on the source side. Therefore, when the user switches to the DO AN on the target side to make a new call, the PDSN address obtained through A13 is wrong, which will cause the PCF on the target side to fail to reselect a suitable PDSN for the user according to the principle of load sharing.

Contents of the invention

The main purpose of the present invention is to provide a message transmission scheme in a CDMA base station system, to at least solve the above-mentioned problem of abnormal interaction with PDSN when data service changes occur between 1x BS and DO AN under the same PCF.

In order to achieve the above purpose, according to one aspect of the present invention, a method for transmitting messages in a CDMA base station system is provided.

The message transmission method in the CDMA base station system according to the present invention comprises the following steps: the user terminal switches from the DO AN to the 1x BS under the same packet control function PCF; And/or a notification message for releasing the data service, wherein, the notification message for notifying the terminal user to establish the data service in the 1x BS carries the PDSN address information of the packet data service node currently selected by the PCF; DO AN receives the notification message, according to The notification message updates the locally stored PDSN address information corresponding to the user terminal.

Further, when the PCF sends a notification message to the DO AN to notify the user terminal to establish a data service in the 1x BS, the DO AN updates the locally stored PDSN address information corresponding to the user terminal according to the notification message, including: DO AN according to The PDSN address information carried in the notification message updates the locally stored PDSN address information corresponding to the user terminal.

Further, before the PCF sends a notification message for notifying the user terminal to establish a data service in the 1x BS to the DO AN, the method also includes: the PCF selects a PDSN according to the load sharing principle, and sends the user terminal to the selected PDSN A request message to establish a data service in the BS; the selected PDSN sends a message to the PCF that the user terminal successfully establishes a data service in the 1x BS.

Further, after the selected PDSN sends to the PCF a message that the user terminal successfully establishes a data service in the 1x BS, the method further includes: the PCF receives a message from the selected PDSN that the user terminal successfully establishes a data service in the 1x BS message; when the data service is an active data service, the PCF sends a connection establishment message between the user terminal and the selected PDSN to the 1x BS; when the data service is a dormant data service, the PCF sends the user terminal to the 1x BS Connection release message with the selected PDSN.

Further, when the PCF sends a notification message to the DO AN to notify the terminal user to release the data service in the 1x BS, the DO AN updates the locally stored PDSN address information corresponding to the user terminal according to the notification message, including: DO AN deletes The locally stored PDSN address information corresponding to the user terminal; or the DO AN sets the locally stored PDSN address information corresponding to the user terminal to null.

Further, before the PCF sends a notification message for notifying the user terminal to release the data service in the 1x BS to the DO AN, the method further includes: the PCF receives a message from the network side indicating that the user terminal has released the data service in the 1x BS ; and the PCF sends a connection release completion message of the user terminal and its corresponding PDSN to the 1x BS.

In order to achieve the above purpose, according to another aspect of the present invention, a CDMA base station system is also provided.

According to the CDMA base station system of the present invention, it includes 1x BS, DO AN and PCF, wherein, 1x BS and DO AN are under the same PCF, and 1x BS includes: a first receiving module, which is used to receive user terminals switching from DO AN to 1x The switching message of the BS; the PCF includes: a sending module for sending a notification message notifying the user terminal to establish and/or release the data service in the 1x BS, wherein the notification message notifying the terminal user to establish the data service in the 1x BS carries the PCF Currently selected packet data service node PDSN address information; DO AN includes: a second receiving module, used to receive a notification message from the PCF; and an update module, used to update the locally stored PDSN corresponding to the user terminal according to the notification message Address information.

Further, the update module is also used to update the locally stored information about the user terminal according to the PDSN address information carried in the notification message when the PCF sends a notification message to the DO AN for notifying the user terminal to establish a data service in the 1x BS. Corresponding PDSN address information.

Further, the update module is also used to delete the locally stored PDSN address information corresponding to the user terminal when the PCF sends a notification message to the DO AN to notify the terminal user to release the data service in the 1x BS; The PDSN address information corresponding to the user terminal is set to be empty.

Further, the sending module is further configured to send a connection release completion message of the user terminal and its corresponding PDSN to the 1x BS after receiving the message from the network side indicating that the user terminal has released the data service in the 1x BS.

Through the present invention, after the user terminal switches from the DO AN to the 1x BS under the same PCF, the PCF notifies the DO AN of the relevant information when the user terminal uses or releases the data service under the 1x BS, and solves the same problem. The problem of abnormal interaction with PDSN when the data service changes between 1x BS and DOAN under PCF improves the stability of the system.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of connection of network elements in a CDMA system according to the related art;

FIG. 2 is a schematic diagram of an access terminal switching between different CDMA base station systems according to the related art;

Fig. 3 is a flow chart of a method for transmitting messages in a CDMA base station system according to an embodiment of the present invention;

4 is a schematic structural diagram of a CDMA base station system according to an embodiment of the present invention;

Fig. 5 is a flow chart of establishing a 1x activation data service by a user according to an embodiment of the present invention;

Fig. 6 is the flow chart that the user establishes 1x dormant data service according to the embodiment of the present invention; And

Fig. 7 is a flow chart of releasing a data service by a 1x user according to an embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

According to an embodiment of the present invention, a method for transmitting messages in a CDMA base station system is provided. Fig. 3 is the flow chart of the transmission method of message in the CDMA base station system according to the embodiment of the present invention, as shown in Fig. 3, this method comprises the following steps:

Step S302, the user terminal switches from DOAN to 1x BS under the same PCF;

Step S304, the PCF sends a notification message to the DO AN for notifying the user terminal to establish and/or release the data service in the 1x BS, wherein the notification message for notifying the terminal user to establish the data service in the 1x BS carries the PCF current selection The specified PDSN address information; and

In step S306, the DOAN receives the notification message, and updates the locally stored PDSN address information corresponding to the user terminal according to the notification message.

Through the above steps, after the user terminal switches from the DO AN to the 1x BS under the same PCF, the PCF notifies the DO AN of the relevant information when the user terminal uses or releases data services under the 1x BS, and solves the same problem. The problem of abnormal interaction with PDSN when the data service changes between 1x BS and DO AN under PCF improves the stability of the system.

Preferably, in step S304, when the PCF sends a notification message to the DO AN for notifying the user terminal to establish a data service in the 1x BS, the DO AN can update the locally saved information corresponding to the user terminal according to the PDSN address information carried in the notification message. PDSN address information. This increases the accuracy of the system.

For example, the DO AN may change the locally stored PDSN address corresponding to the user terminal to the PDSN address carried in the notification message received from the PCF.

Preferably, before step S304, the PCF can select a PDSN according to the load sharing principle, and send a request message for the user terminal to establish a data service in the 1x BS to the selected PDSN; the selected PDSN sends the user terminal to the PCF. The message that the data service is successfully established in the For example, when the PCF receives a request message from a user terminal of 1x BS to establish a data service, the PCF selects a PDSN according to the current actual situation, and forwards the request message of the user terminal to establish a data service under the 1x BS to the PDSN. This method enables the PCF to select the PDSN required to establish the data service according to the actual situation, so that the user terminal can also establish the data service in the 1x BS, and improves the flexibility and processing capacity of the system.

Preferably, after the selected PDSN sends the message that the user terminal successfully establishes the data service in the 1x BS to the PCF, the PCF receives a message from the selected PDSN that the user terminal successfully establishes the data service in the 1x BS; When the service is an active data service, the PCF can send a connection establishment message between the user terminal and the selected PDSN to the 1x BS; A connection release message for the selected PDSN. This method can improve the effectiveness and accuracy of the system.

Preferably, before step S304, the PCF receives a message indicating that the user terminal has released the data service in the 1x BS from the network side; and the PCF sends a connection release completion message of the user terminal and its corresponding PDSN to the 1x BS. For example, the PCF receives a request message from the 1x BS to release the user terminal, and the PCF forwards the request message to the PDSN corresponding to the user terminal (that is, used when the user terminal performs data services), and releases the user terminal upon receiving the response from the PDSN Terminal success message. The method is simple, practical and highly operable.

Preferably, in step S304, when the PCF sends a notification message to the DO AN to notify the terminal user to release the data service in the 1x BS, the DOAN can delete the locally stored PDSN address information corresponding to the user terminal; or the DOAN can save the locally The stored PDSN address information corresponding to the user terminal is set to be empty. This method can improve the effectiveness of the system.

Corresponding to the above method, the embodiment of the present invention also provides a CDMA base station system. Fig. 4 is the structural representation of the CDMA base station system according to the embodiment of the present invention, as shown in Fig. 4, this CDMA base station system 40 comprises 1x BS 42, DO AN 44 and PCF 46, wherein, 1x BS 42 and DO AN 44 are in the same Under a PCF 46, the 1x BS 42 includes: a first receiving module 422, which is used to receive the handover message that the user terminal is switched from the DO AN 44 to the 1x BS 42; The notification message of setting up and/or releasing the data service in BS 42, wherein, the notification message notifying the end user to set up the data service in 1x BS 42 carries the PDSN address information currently selected by PCF 46; DO AN 44 includes: the second receiving Module 442, coupled to the sending module 462, for receiving the notification message from the PCF 46; and the updating module 444, coupled to the second receiving module 442, for updating the locally stored PDSN address corresponding to the user terminal according to the notification message information.

Preferably, the updating module 444 is also used to update the locally saved information according to the PDSN address information carried in the notification message when the PCF 46 sends a notification message to the DO AN 44 to notify the user terminal to establish a data service in the 1x BS 42. PDSN address information corresponding to the user terminal.

Preferably, the update module 444 is also used to delete the locally stored PDSN address information corresponding to the user terminal when the PCF 46 sends a notification message to the DO AN 44 to notify the terminal user to release the data service in the 1x BS 42; Alternatively, the locally saved PDSN address information corresponding to the user terminal is set to be empty.

Preferably, the sending module 462 is further configured to send the connection release completion of the user terminal to its corresponding PDSN to the 1x BS 42 after receiving a message indicating that the user terminal has released the data service in the 1x BS 42 from the network side (for example, PDSN) information.

The implementation process of the above-mentioned embodiments will be described in detail below in conjunction with preferred embodiments and accompanying drawings.

Embodiment one

This embodiment provides a method for timely notifying the DO AN under the PCF when a user under the same PCF uses 1x data service, so that the DO AN at the source side can always obtain the latest PDSN address information when the user uses 1x data service , or enable the DO AN on the source side to obtain the information that the user releases the 1x data service, which solves the problem that the PDSN address may be wrong when switching between different access networks.

For example, when a user establishes a CDMA 1x data service, the PCF can notify the DO AN of the PDSN address information under the PCF, and the DO AN updates the PDSN address information and other related information in time; when the user releases the 1x data service, the PCF can notify the user The release information is notified to DO AN, and DO AN deletes the PDSN address information and other related information.

In the specific implementation process, the transmission method of the message in the CDMA base station system of the present embodiment may include the following steps:

Step 1: PCF notifies DO AN in time of the user's establishment and release of data services at 1x.

Step 2, DO AN receives the PDSN address update notification from the PCF, and updates the saved PDSN address information; receives the user release notification from the PCF, and deletes the PDSN address information and other related information.

Preferably, step 1 may also include: after the user successfully establishes the 1x data service, the PCF sends the PDSN address update notification to the DO AN; after the user releases the 1x data service, the PCF sends the user release notification to the DO AN.

Preferably, step 2 may also include: when the DO AN receives the PDSN address update notification, update and save the address of the PDSN; when the DO AN receives the user release notification, delete the saved PDSN address information and other related information.

It should be noted that the establishment of the 1x data service in the above step 1 may include the establishment of an active data service under 1x, and may also include the establishment of a dormant data service (that is, dormancy switching).

Embodiment two

Fig. 5 is the flow chart that the user establishes 1x activation data service according to the embodiment of the present invention, as shown in Fig. 5,

In step S502, the 1x BS sends an A9-Setup-A8 message to the PCF, requesting to establish an activation data service.

In step S504, the PCF selects a PDSN message according to the load sharing principle.

In step S506, the PCF sends a message A11-Registration Request to the selected PDSN.

In step S508, the PDSN responds to the A11-Registration Reply message.

In step S510, the PCF responds to the 1x BS with an A9-Connect-A8 message.

In step S512, the PCF sends a PDSN address update notification message to the DO AN.

Step S514, the DO AN updates the stored PDSN address information.

Embodiment Three

Fig. 6 is a flow chart of establishing a 1x dormant data service by a user according to an embodiment of the present invention. As shown in Fig. 6, the process may include the following steps:

In step S602, the 1x BS sends an A9-Setup-A8 message to the PCF, requesting to establish a dormant data service.

In step S604, the PCF selects a PDSN according to the load sharing principle.

In step S606, the PCF sends a message A11-Registration Request to the selected PDSN.

In step S608, the PDSN responds to the A11-Registration Reply message.

In step S610, the PCF responds to the 1x BS with an A9-Release-A8 Complete message.

In step S612, the PCF sends a PDSN address update notification message to the DO AN.

Step S614, the DO AN updates the stored PDSN address information.

Embodiment four

Fig. 7 is a flow chart of releasing a data service by a 1x user according to an embodiment of the present invention. As shown in Fig. 7, the process may include the following steps:

In step S702, the 1x BS sends an A9-Release-A8 message to the PCF to indicate release of the user.

In step S704, the PCF sends a message A11-Registration Request to the PDSN.

In step S706, the PDSN responds to the A11-Registration Reply message.

In step S708, the PCF responds to the 1x BS with an A9-Release-A8 Complete message.

In step S710, the PCF sends a user release notification message to the DO AN.

Step S712, DO AN deletes the stored PDSN address information and other related information.

To sum up, the embodiment of the present invention relates to a method for notifying the EVDO access network when the user establishes and releases 1x data service in the CDMA base station system, which can be used for the EVDO access network to update or delete the stored PDSN address information and other related information in time. information. Through the embodiment of the present invention, after the user terminal switches from the DOAN to the 1xBS under the same PCF, the PCF notifies the DOAN of the relevant information when the user terminal uses or releases data services under the 1x BS, which improves the reliability of the system. stability.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. a transmission method of message in CDMA base station system, is characterized in that, comprises the following steps: The user terminal is handed over from the access network DO AN to the base station 1x BS under the same packet control function PCF; The PCF sends a notification message for notifying the user terminal to establish and/or release a data service in the 1x BS to the DO AN, wherein the notification message for notifying the terminal user to establish and/or release a data service in the 1x BS The notification message for establishing the data service carries the PDSN address information of the packet data service node currently selected by the PCF; The DO AN receives the notification message, and updates locally stored PDSN address information corresponding to the user terminal according to the notification message; Wherein, when the PCF sends the notification message to the DO AN to notify the terminal user to release the data service in the 1x BS, the DO AN updates the locally stored The PDSN address information corresponding to the user terminal includes: the DO AN deletes the locally stored PDSN address information corresponding to the user terminal; or, the DO AN deletes the locally stored PDSN address corresponding to the user terminal Information is set to empty. 2. The method according to claim 1, wherein, when the PCF sends the notification message for notifying the UE to establish a data service in the 1x BS to the DO AN, The DO AN updating locally stored PDSN address information corresponding to the user terminal according to the notification message includes: The DO AN updates locally stored PDSN address information corresponding to the user terminal according to the PDSN address information carried in the notification message. 3. The method according to claim 2, wherein before the PCF sends the notification message for notifying the UE to establish a data service in the 1x BS to the DO AN, further comprising: The PCF selects a PDSN according to the load sharing principle, and sends a request message for the user terminal to establish the data service in the 1x BS to the selected PDSN; The PDSN currently selected by the PCF sends to the PCF a message that the user terminal successfully establishes the data service in the 1x BS. 4. The method according to claim 2 or 3, characterized in that, after the PDSN currently selected by the PCF sends the message that the user terminal successfully establishes the data service in the 1x BS to the PCF, Also includes: The PCF receives a message that the user terminal successfully establishes the data service in the 1x BS sent by the PDSN currently selected by the PCF; When the data service is an activated data service, the PCF sends a connection establishment message between the user terminal and the PDSN currently selected by the PCF to the 1x BS; when the data service is a dormant data service In the case of a service, the PCF sends a connection release message between the user terminal and the PDSN currently selected by the PCF to the 1x BS. 5. The method according to claim 1, wherein before the PCF sends the notification message for notifying the user terminal to release the data service in the 1x BS to the DO AN, further comprising: The PCF receives a message from the network side indicating that the user terminal has released the data service in the 1x BS; and The PCF sends a connection release completion message between the user terminal and its corresponding PDSN to the 1x BS. 6. A code division multiple access CDMA base station system is characterized in that, comprises base station 1x BS, access network DO AN and packet control function PCF, wherein, described 1x BS and described DO AN are under the same described PCF , The 1x BS includes: a first receiving module, configured to receive a handover message for a user terminal to switch from the DO AN to the 1x BS; The PCF includes: a sending module, configured to send a notification message notifying the user terminal to establish and/or release a data service in the 1x BS, wherein the notifying the terminal user to establish a data service in the 1x BS The notification message of the service carries the PDSN address information of the packet data service node currently selected by the PCF; The DO AN includes: a second receiving module, configured to receive the notification message from the PCF; and an updating module, configured to update locally stored PDSN address information corresponding to the user terminal according to the notification message; Wherein, the update module is further configured to delete the locally saved and all The PDSN address information corresponding to the user terminal; or setting the locally saved PDSN address information corresponding to the user terminal to be empty. 7. The CDMA base station system according to claim 6, wherein the update module is also used to notify the user terminal to set up a data service in the 1x BS to the DO AN at the PCF In the case of the notification message, update the locally stored PDSN address information corresponding to the user terminal according to the PDSN address information carried in the notification message. 8. The CDMA base station system according to claim 6, wherein the sending module is further configured to receive the message indicating that the user terminal has released the data service in the 1x BS from the network side , sending a connection release completion message between the user terminal and its corresponding PDSN to the 1xBS.