WO2007147350A1

WO2007147350A1 - A method and device for forwarding internet protocol packets of the base station controller

Info

Publication number: WO2007147350A1
Application number: PCT/CN2007/070040
Authority: WO
Inventors: Jianhua Yu; Ming Zheng
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-06-13
Filing date: 2007-05-22
Publication date: 2007-12-27
Also published as: CN1984143A; CN1984143B

Abstract

A method for forwarding the Internet Protocol (IP) packets of the base station controller is disclosed, which includes: set logic address for the application unit of the base station controller, and establish the corresponding relationship between the logic address and the physical address of the interface of the base station controller; based on the corresponding relationship, the interface of the base station controller transmits the IP packet from the outside of the base station controller to the application unit, and/or transmits the IP packet from the application unit to the outside of the base station controller. An IP packet forward device used in the base station controller and a base station controller are also disclosed in the embodiment of the present invention. After the present invention is performed, as the logic address of application unit in the base station controller is invisible to the router, the base station controller will not be an attacking target of an unsafe source of the Internet easily, and the security of the base station controller is improved evidently. Furthermore, the usage of the user of the base station side is more convenient, and the process efficiency is improved, the occupation of the CPU resource is less.

Description

Network protocol packet forwarding method and device for base station controller

The present invention relates to the field of Internet Protocol (IP) technology, and more particularly to an IP packet forwarding method and apparatus for a base station controller. Background of the invention

Currently, the global digital mobile communication system (GSM) and the code division multiple access mobile communication system (CDMA) are widely used all over the world, and the wideband code division multiple access mobile communication system (WCDMA code division multiple access mobile) Mobile communication systems such as Communication System 2000 (CDMA2000) and Time Division Duplex-Synchronous Code Division Multiple Access (TD-SCDMA) have also obtained a certain degree of application within a certain range. These mobile communication systems belong to the Radio Access Network (RAN). Category.

Because IP transmission has the advantages of large capacity, low cost, and mature technology, it is widely used in RAN. For example, in an actual radio access network system, the base station controller and the base station access the IP network through various methods such as η*Ε1 or Fast Ethernet (FE), wherein all signaling, data, and voice transmissions are passed. IP network to achieve.

In the IP transmission of the base station controller, it is necessary to solve problems such as quality of service (QoS) and security. Therefore, the processing time of the central processing unit (CPU) occupied by the IP layer processing in the base station controller is required to be small, and the IP packet is required to have a small processing delay and good security performance. However, for design reasons, the actual large-capacity base station controller needs to distribute the interface processing on different physical units, has multiple interface physical IP addresses, and various application processing (such as voice processing, data processing, signaling). Processing, etc.) often logically must use only one logical IP address, so the uncoordinated address will bring some difficulties to the IP transmission network. For example, the voice transmission between the base station controller and the base station is taken as an example, and it is obvious that other processing such as signaling and data transmission is similar.

The voice transmission between the base station controller and the base station will be described below by taking the CDMA 2000 system as an example.

1 is a schematic diagram of voice transmission between a base station controller and a base station in a CDMA2000 system in the prior art. In the CDMA 2000 system, the base station controller is called a BSC (Base Station Controller), and the base station is a BTS (Base Transceiver Station).

As shown in FIG. 1, the base station controller communicates with the base station by means of n*El or FE, and the base station controller voice processing unit is configured to process the transmitted voice. The base station controller has a large processing capacity, and the base station controller voice processing unit is connected to the interface unit 1 and the interface unit 2, wherein the interface unit 1 is responsible for processing the IP voice packets of the base station 1 and the base station 2, and the physical IP address of the interface unit 1 is 192.0. .0.1, the interface unit 2 is responsible for processing the IP voice packet of the base station 3, and the physical IP address of the interface unit 2 is 192.0.0.4.

As can be seen from Fig. 1, first, the physical IP addresses of the interface unit 1 and the interface unit 2 are visible to the router, which poses a great security risk to the security of the base station controller.

In addition, the base station controller interface processing is distributed on different interface units and has multiple interface physical IP addresses. Thus, from the perspective of the user on the base station side, the other party is not a base station controller, but many interface boards, so that the user on the base station side communicates with the base station controller just like the communication with multiple interface boards, so it is very It is convenient for the user on the base station side to communicate with the base station controller.

At the same time, if the conventional IP protocol unpacking and packet processing are used inside the base station controller, it will cause problems for the QoS performance of the IP transmission.

Although the CDMA2000 system has been described as an example, the same problem exists in the second generation mobile communication system represented by GSM and CDMA and the third generation mobile communication system such as WCDMA and TD-SCDMA. Summary of the invention

In view of this, the main purpose of the embodiment of the present invention is to provide an IP packet forwarding method of a base station controller, so as to improve IP packet forwarding security of the base station controller.

Another object of the embodiments of the present invention is to provide an IP packet forwarding apparatus of a base station controller to improve IP packet forwarding security of a base station controller.

To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows: A method for forwarding an IP packet of a base station controller, where the method includes:

A. setting a logical address for the application unit in the base station controller, and establishing a correspondence between the logical address and a physical address of an interface of the base station controller;

B. The interface of the base station controller sends an IP packet from the base station controller to the application unit according to the correspondence between the logical address and the physical address, and/or sends the IP packet from the application unit to the base station. Outside the controller.

The sending the IP packet from the application unit to the base station controller is specifically: the interface of the base station controller sends the IP packet from the application unit to the base station;

Step B includes:

Bl l, the application unit sends an IP packet to an interface of the base station controller, where the IP packet includes a source address and a destination address, where the source address is the logical address set for the application unit, and the destination address is a base station. Address

B12. The interface of the base station controller replaces the source address of the IP packet with the physical address of the interface of the base station controller, and sends the IP packet to the base station.

The IP packet forwarding method of the base station controller according to claim 1, wherein the transmitting the IP packet from the base station controller to the application unit is specifically: the interface of the base station controller sends the IP packet from the base station. To the application unit;

Step B includes:

2 the base station sends an IP packet to an interface of the base station controller, where the IP packet includes a source address and a destination address, where the source address is an address of the base station, and the destination address is a physical address of an interface of the base station controller;

B22. The interface of the base station controller replaces a destination address of the IP packet with a logical address set by the application unit, replaces a source address with a physical address of an interface of the base station controller, and sends the IP packet to the Application unit.

The base station controller has at least two interfaces, and at least one of the interfaces serves as a public gateway interface.

Step B21 is: the base station sends an IP packet to a common gateway interface of the base station controller, where the IP packet includes a source address and a destination address, where the source address is an address of the base station, and the destination address is a physical address of the public gateway interface. ;

Step B22 includes:

B221, the public gateway interface load uniformly forwards the IP packet to all interfaces including the public gateway interface itself to implement load sharing;

B222. After receiving an IP packet, each interface replaces the destination address of the IP packet with a logical address set by the application unit, replaces the source address with a physical address of the public gateway interface, and sends the IP packet to the Application unit.

The application unit is at least two for processing different types of IP packets;

The step B222 includes:

After receiving the IP packet, each interface determines an application unit that processes the IP packet according to the destination address in the IP packet, replaces the destination address of the IP packet with the logical address set by the determined application unit, and replaces the source address with the source address. The physical address of the public gateway interface and the IP packet is sent to the identified application unit.

The method further includes pre-designating at least one interface for each application unit as a common gateway interface of the application unit, and the base station further determines receiving according to the type of the IP packet to be transmitted. The common gateway interface of the IP packet.

An IP packet forwarding device of a base station controller, the device comprising a correspondence relationship storage unit and an interface module, wherein:

Corresponding relationship storage unit, configured to store a correspondence between a logical address of an application unit in the base station controller and a physical address of the interface module;

An interface module, configured to send an IP packet from the base station controller to the application unit according to the correspondence between the logical address and the physical address of the interface module, and/or send the IP packet from the application unit to the base station control Outside the device.

The IP packet forwarding device is connected to the base station, the interface module includes an address replacement unit, and the interface module is configured to receive an IP packet sent by the application unit, where the IP packet includes a source address and a destination address, where the source address is The logical address set for the application unit, the destination address is the address of the base station, and

The address replacement module is configured to replace the source address of the IP packet with the physical address of the interface of the base station controller, and send the IP packet to the base station.

The IP packet forwarding device is connected to the base station, and the interface module includes an address replacement unit, where the interface module is configured to receive an IP packet sent by the base station, where the IP packet includes a source address and a destination address, where the source address is a base station. Address, the destination address is the physical address of the interface of the base station controller;

An address replacement unit, configured to replace the destination address of the IP packet with a logical address set by the application unit, replace the source address with a physical address of an interface of the base station controller, and

The IP packet is sent to the application unit.

The interface module is at least two, and at least one of the interface modules serves as a public gateway interface, and the common gateway interface includes a load sharing unit.

a common gateway interface, configured to receive an IP packet sent by the base station, where the IP packet includes a source address and a destination address, where the source address is an address of the base station, and the destination address is the public gateway. The physical address of the interface; and

The load sharing unit is configured to uniformly forward the IP packet to all the interface modules including the public gateway interface itself to implement load sharing;

Each interface module is configured to: after receiving the IP packet, replace the destination address of the IP packet with the logical address set by the application unit, set the source address to the physical address of the common gateway interface, and send the IP packet Go to the application unit.

The application unit is at least two for processing different types of IP packets; each interface module is configured to determine, after receiving the IP packet, an application unit that processes the IP packet according to the destination address in the IP packet, where the The destination address of the IP packet is replaced with the logical address of the determined application unit setting, the source address is replaced with the physical address of the common gateway interface, and the IP packet is sent to the determined application unit.

The public gateway interface is provided with a hardware board and a dual backup of the port.

The corresponding relationship storage unit is configured to save a correspondence between a logical address of at least two application units and a physical address of the interface module, where the application unit is respectively configured with a corresponding logical address;

The IP packet forwarding device further includes a processing type determining unit,

a processing type determining unit, configured to determine, according to the destination address in the IP packet, an application unit that processes the IP packet;

The interface module is configured to send, according to the correspondence between the logical address and the physical address of the interface of the base station controller, the IP packet from the base station controller to the application unit determined by the determining unit, and/or the IP packet The application unit determined by the determining unit is sent outside the base station controller.

A base station controller, the base station controller includes:

The IP packet forwarding device according to any of the preceding claims.

The application unit is a voice processing unit, a signaling processing unit, or a data processing unit. The base station controller is applied to GSM, or applied to CDMA, or applied to WCDMA, or applied to CDMA 2000, or applied to a TD-SCDMA mobile communication system.

As can be seen from the above technical solution, one of the technical solutions first sets a logical address for an application unit in the base station controller, and establishes a correspondence between the logical address and a physical address of an interface of the base station controller; then, the base station When forwarding the IP packet, the interface of the controller sends the IP packet from the base station controller to the application unit according to the correspondence between the logical address and the physical address, and/or sends the IP packet from the application unit to Outside the base station controller. Therefore, after applying the present invention, since the logical address corresponding to the physical address of the base station controller is set for the application unit in the base station controller, the logical address of the application unit can be invisible to the router, so the application in the base station controller Units are not easily targeted by unsafe sources on the Internet, greatly enhancing the security of the base station controller.

In addition, in another technical solution, since multiple interface modules can share the same logical address, the base station side user only needs to communicate with the logical address, and does not need to directly communicate with multiple interface modules, so it is also greatly convenient. The use of the base station side user.

Moreover, the IP address replacement technology is adopted on the base station controller interface module, which improves the processing efficiency and occupies less CPU resources. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic diagram of voice transmission between a base station controller and a base station in a CDMA2000 system in the prior art.

1 is a schematic flow chart showing an IP packet forwarding method of a base station controller according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of an IP packet forwarding apparatus for a base station controller according to an embodiment of the present invention. 4 is a schematic diagram of transmission of IP packet forwarding between a base station controller and a base station according to an embodiment of the present invention.

FIG. 5 is a schematic diagram showing an exemplary flow of the structure shown in FIG. 4 applied to a CDMA2000 system, and the base station controller receives an IP packet.

6 is a schematic flow chart showing the application of the structure shown in FIG. 4 to a CDMA 2000 system, in which a base station controller transmits an IP packet. Mode for carrying out the invention

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

In the embodiment of the present invention, first, a logical address is set for an application unit in the base station controller, and a correspondence between the logical address and a physical address of an interface of the base station controller is established; and then the interface of the base station controller is based on the logical address and the physical The correspondence between the addresses, the IP packets are sent from outside the base station controller to the application unit, and/or the IP packets are sent from the application unit to the outside of the base station controller.

FIG. 1 is a schematic flowchart diagram of an IP packet forwarding method of a base station controller according to an embodiment of the present invention.

As shown in Figure 2, the method includes:

Step 201: Set a logical address for an application unit in the base station controller, and establish a correspondence between the logical address and a physical address of an interface of the base station controller.

Here, the application unit within the base station controller includes a voice processing unit, a signaling processing unit, or a data processing unit. Embodiments of the present invention may each set a logical address for a speech processing unit, a signaling processing unit, or a data processing unit, and establish a correspondence between these logical addresses and a physical address of an interface of the base station controller. The logical addresses of these application units are invisible to the router, greatly enhancing the security inside the base station controller. Step 202: The interface of the base station controller sends the IP packet from the base station controller to the application unit according to the correspondence between the logical address and the physical address, and/or sends the IP packet from the application unit to the outside of the base station controller.

Here, according to the correspondence between the logical address and the physical address, when the interface of the base station controller sends the IP packet from the application unit to the base station controller, the interface of the base station controller will source the IP packet in the forwarding process. The physical address of the interface of the base station controller is replaced; when the interface of the base station controller sends the IP packet from the base station controller to the application unit, the interface of the base station controller sets the destination address of the IP packet to be the forwarding process. The logical address set by the application unit is set, and the source address is set to the physical address of the interface of the base station controller.

In general, the information exchange between the base station controller and the base station is relatively common. The following details the present invention to implement the IP packet interaction between the base station controller and the base station through the interface.

Specifically, when the interface of the base station controller sends the IP packet from the application unit to the base station, step 202 may include:

The application unit sends the IP packet to the interface of the base station controller, where the IP packet includes the source address and the destination address, where the source address is the logical address of the application unit, the destination address is the address of the base station, and the interface of the base station controller is the IP packet. The source address is replaced with the physical address of the interface of the base station controller, and the IP packet is sent to the base station.

When the interface of the base station controller sends the IP packet from the base station to the application unit, step 202 may include:

The base station sends the IP packet to the interface of the base station controller, where the IP packet includes a source address and a destination address, where the source address is the address of the base station, the destination address is the physical address of the interface of the base station controller, and the interface of the base station controller is IP. The destination address of the packet is set to the logical address set by the application unit, the source address is set to the physical address of the interface of the base station controller, and the IP packet is sent to the application unit.

Preferably, the base station controller has at least two interfaces, and at least one of the interfaces is As a public gateway interface. At this time, when the interface of the base station controller sends the IP packet from the base station to the application unit, the base station first sends the IP packet to the common gateway interface of the base station controller, where the IP packet includes a source address and a destination address, where the source address is the base station. The address, the destination address is the physical address of the public gateway interface, and then the public gateway interface loads the IP packets in turn to all the interfaces including the common gateway interface itself to implement load sharing. Then, after receiving the IP packet, each interface sets the destination address of the IP packet to the logical address set by the application unit, sets the source address to the physical address of the common gateway interface, and sends the IP packet to the application unit. .

More preferably, there are at least two application units for handling different types of IP packets. At this time, after receiving the IP packet, each interface determines an application unit that processes the IP packet according to the destination address in the IP packet, sets the destination address of the IP packet to the logical address set by the determined application unit, and sets the source address. Set to the physical address of the public gateway interface and send the IP packet to the determined application unit. Since the type of processing is usually only three types of voice, signaling, and data, the process of determining an application unit can be completed as quickly as possible.

When the application unit is at least two to process different types of IP packets, at least one interface may be specified for each application unit as a common gateway interface of the application unit, and the base station further determines to receive the according to the type of the IP packet to be sent. The public gateway interface of the IP packet. Each type of public gateway interface loads the IP packets of this type into all interfaces including the common gateway interface itself in order to achieve load sharing.

The above process can be applied to the second generation mobile communication system or to the third generation mobile communication system. If applied to a second generation communication system represented by GSM or CDMA, the base station controller generally corresponds to a BSC in a GSM or CDMA system, and the base station corresponds to a BTS in a GSM or CDMA system; if applied to a CDMA 2000 system, the base station The controller generally corresponds to the BSC in the CDMA 2000 system, and the base station corresponds to the BTS in the CDMA 2000 system; if applied to the WCDMA, TD-SCDMA system, the base The station controller generally corresponds to the RNC, and the base station corresponds to the Node B.

The invention also discloses an IP packet forwarding device of a base station controller. FIG. 3 is a schematic diagram showing an exemplary structure of an IP packet forwarding apparatus of a base station controller according to an embodiment of the present invention. As shown in FIG. 3, the apparatus 300 includes a correspondence relationship storage unit 301 and an interface module 302, where:

The correspondence relationship storage unit 301 is configured to save a correspondence between a logical address of the application unit in the base station controller and a physical address of the interface module 302.

The interface module 302 is configured to send an IP packet from the base station controller to the application unit according to the correspondence between the logical address and the physical address of the interface module, and/or send the IP packet from the application unit to the base station. Outside the controller.

Specifically, when the interface module 302 is configured to send an IP packet from the application unit to the base station controller, the interface module 302 replaces the source address of the IP packet in the forwarding process according to the correspondence between the logical address and the physical address. The physical address of the interface of the base station controller; when the interface module 302 is configured to send the IP packet from the base station controller to the application unit, the interface module 302 is in the forwarding process according to the correspondence between the logical address and the physical address. The destination address of the IP packet is set to the logical address set by the application unit, and the source address is set to the physical address of the interface of the base station controller.

The apparatus 300 proposed by the present invention is particularly suitable for IP packet interaction with a base station. When the IP packet forwarding device 300 is configured to send the IP packet of the base station controller to the base station, the IP packet forwarding device 300 is connected to the base station, and the interface module includes an address replacement unit.

The interface module 302 is configured to receive an IP packet sent by the application unit, where the IP packet includes a source address and a destination address, where the source address is a logical address set for the application unit, and the destination address is an address of the base station, and

An address replacement unit is configured to replace the source address of the IP packet with a physical address of an interface of the base station controller, and send the IP packet to the base station.

Moreover, when the IP packet forwarding device 300 of the base station controller is used to implement the IP of the base station When the packet is sent to the base station controller, the IP packet forwarding device 300 is connected to the base station, and the interface module may also include an address replacement unit;

The interface module 302 is configured to receive an IP packet sent by the base station, where the IP packet includes a source address and a destination address, where the source address is an address of the base station, and the destination address is a physical address of an interface of the base station controller; And

And an address replacement unit, configured to replace the destination address of the IP packet with a logical address set by the application unit, replace the source address with a physical address of an interface of the base station controller, and send the IP packet to the application unit.

Preferably, the interface module 302 is at least two, and at least one of the interface modules serves as a common gateway interface, and the common gateway interface may include a load sharing unit;

a common gateway interface, configured to receive an IP packet sent by the base station, where the IP packet includes a source address and a destination address, where the source address is an address of the base station, and the destination address is a physical address of the public gateway interface;

Each interface module is configured to: after receiving the IP packet, replace the destination address of the IP packet with the logical address set by the application unit, replace the source address with the physical address of the common gateway interface, and send the IP packet Go to the application unit.

More preferably, a hardware board and a dual backup of the port are provided on the common gateway interface to ensure high reliability of the public gateway interface.

When the base station controller has multiple application units, the corresponding relationship storage unit 301 is configured to save a correspondence between logical addresses of at least two application units and physical addresses of the interface modules, and the application units respectively have corresponding logics. address.

a processing type determining unit, configured to determine, according to a destination address in the IP packet, to process the IP packet Application unit

Each interface module is configured to send an IP packet from outside the base station controller to the application unit determined by the determining unit according to a correspondence between the logical address and an interface physical address of the base station controller, and/or The IP packet is sent from the application unit determined by the determining unit to the outside of the base station controller.

More preferably, when there are at least two application units for processing different types of IP packets, at least one interface is specified for each application unit as a common gateway interface of the application unit, and the base station further determines according to the IP packet to be sent. The type determines the public gateway interface that receives the IP packet.

Similarly, the above device can be applied to the second generation mobile communication system or to the third generation mobile communication system.

4 is a schematic diagram of transmission of IP packet forwarding between a base station controller and a base station according to an embodiment of the present invention. As shown in Figure 4, a logical address (80.0.0.1) is added to the base station controller speech processing unit within the base station controller. Interface module 1 is a common gateway interface, its physical address is 192.0.0.1, and the physical address of interface module 2 is 192.0.0.4. By associating the logical address of the base station controller voice processing unit with the physical address of the interface module, the logical address of the voice processing unit of the base station controller is invisible to the router, thereby increasing the security of the internal address of the base station controller. In addition, the interface module is replaced by an IP address to implement fast forwarding of IP packets between the internal logical address of the base station controller and the physical address of the interface module.

The default calculation rule of the internal logical address may be first established in the interface module. For example, use 80.0.0.X as the subnet address and XXX as the host address. When there are multiple application units, a logical address is set for each application unit, and the selected application unit is determined by the processing type of the IP packet when the IP packet needs to be forwarded. Since the type of processing is usually only three types of voice, signaling, and data, the search process can be completed quickly. Through the determined type of processing, and between the predetermined logical address and the interface physical address Correspondence, the logical address of the application unit can be directly calculated, which is faster than sequential search. In this example, the processing type is voice, and the logical address is calculated to be 80.0.0.1.

The embodiment of the present invention will be described in more detail below by taking a CDMA2000 system as an example. Figure 5 shows the structure shown in Figure 4 applied to the CDMA 2000 system, the base station controller receives

Schematic diagram of an exemplary flow of an IP packet. Here, the base station controller is the BSC, and the base station is the BTS.

As shown in Figure 5, the method includes:

Step 501: The BTS1 sends an IP packet to the BTS side edge router, where the source address of the packet is 10.0.0.1 (BTS1 logical address) and the destination address is 192.0.0.1 (BSC public gateway address); Step 502: The BTS side edge router will serve The IP packet of the network segment 192.0.0.X is forwarded to the edge router on the BSC side;

Step 503: The edge router on the BSC side forwards the IP packet of the destination address 192.0.0.X network segment to the interface module 1 of the BSC (common gateway interface);

Step 504: The interface module 1 uniformly transfers the IP packet to the remaining interface modules of the BSC (including itself) to implement the load sharing function. Here, usually, the interface module 1 must have high reliability, preferably Set the hardware board and port dual backup.

Step 505: After receiving the IP packet, the BSC interface module performs address replacement. Specifically, the destination address is replaced by the public gateway address into the logical address of the BSC voice processing unit, and the source address is replaced with its own physical address. Taking the interface module 2 as an example, it replaces the destination address from the public gateway address 192.0.0.1 with the logical address (80.0.0.1) of the BSC voice processing unit, and the source address is replaced with the physical address of the interface module 2 (192.0.0.4).

FIG. 6 is a schematic flowchart diagram of the BSC transmitting an IP packet shown in FIG. 4. As shown in Figure 6, the method includes:

Step 601: The BSC sends an IP packet, the source address is 80.0.0.1 (the logical address of the voice processing unit in the BSC;), and the destination address is 10.0.0.1 (BTS logical address;);

Step 602: After receiving the IP packet, the BSC interface module performs address replacement. Specifically: Replace the source address with the physical address of the interface module, and the destination address does not change. Taking interface module 2 as an example, the source address is replaced with the physical address of interface module 2 (192.0.0.4), and the IP packet is sent to the BSC side edge router.

Step 603: The BSC side edge router forwards the IP packet of the destination address 10.0.0.X network segment to the edge router on the BTS side.

Step 604: The edge router on the BTS side forwards the IP packet of the destination address 10.0.0.X to the BTS.

It can be seen from the above that since the internal logical address of the BSC is invisible to the router, the BSC is not easy to become an attack target of an unsafe source on the Internet, thereby ensuring the security of the BSC. Moreover, multiple IP interface modules can share the same logical IP address, which facilitates the use of users on the BTS side; and the IP address replacement technology on the BSC interface module improves the processing efficiency and occupies less CPU resources on the interface module.

5 and 6 illustrate the embodiment of the present invention in detail by taking a CDMA 2000 system as an example. In essence, the embodiments of the present invention can also be applied to second generation mobile communication systems such as GSM and CDMA. Moreover, the embodiments of the present invention can also be applied to various third generation mobile communication systems such as Wideband Code Division Multiple Access (WCDMA) and Time Division Synchronous Code Division Multiple Access (TD-SCDMA).

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for forwarding an internet protocol IP packet of a base station controller, the method comprising:

The IP packet forwarding method of the base station controller according to claim 1, wherein the transmitting the IP packet from the application unit to the base station controller is specifically: the interface of the base station controller is to use the IP packet from the application unit. Send to the base station;

Step B includes:

Bl, the application unit sends an IP packet to an interface of the base station controller, where the IP packet includes a source address and a destination address, where the source address is the logical address set for the application unit, and the destination address is a base station. Address

Step B includes:

2, the base station sends an IP packet to an interface of the base station controller, where the IP packet includes a source address and a destination address, where the source address is an address of the base station, and the destination address is a physical address of an interface of the base station controller; B22. The interface of the base station controller replaces a destination address of the IP packet with a logical address set by the application unit, replaces a source address with a physical address of an interface of the base station controller, and sends the IP packet to the Application unit.

The IP packet forwarding method of the base station controller according to claim 3, wherein the base station controller has at least two interfaces, and at least one of the interfaces serves as a public gateway interface.

Step B22 includes:

B221. The public gateway interface uniformly forwards the IP packet to all interfaces including the public gateway interface itself to implement load sharing.

The IP packet forwarding method of the base station controller according to claim 4, wherein the application unit is at least two for processing different types of IP packets;

The step B222 includes:

After receiving the ip packet, each interface determines an application unit that processes the IP packet according to the destination address in the IP packet, and replaces the destination address of the IP packet with the logical address set by the determined application unit, and replaces the source address with the source address. The physical address of the public gateway interface and the IP packet is sent to the identified application unit.

The IP packet forwarding method of the base station controller according to claim 4, wherein: the application unit is at least two for processing different types of IP packets;

The method further includes pre-designating at least one interface for each application unit as the response With the common gateway interface of the unit, the base station further determines a public gateway interface that receives the IP packet according to the type of the IP packet to be sent.

7. An IP packet forwarding device for a base station controller, the device comprising a corresponding relationship storage unit and an interface module, wherein:

The IP packet forwarding device according to claim 7, wherein the IP packet forwarding device is connected to a base station, and the interface module includes an address replacement unit.

The interface module is configured to receive an IP packet sent by the application unit, where the IP packet includes a source address and a destination address, where the source address is a logical address set for the application unit, and the destination address is an address of the base station, and

The interface module is configured to receive an IP packet sent by a base station, where the IP packet includes a source address and a destination address, where the source address is an address of the base station, and the destination address is a physical address of an interface of the base station controller;

10. The IP packet forwarding device according to claim 9, wherein the interface At least two modules, and at least one of the interface modules serves as a common gateway interface, and the common gateway interface includes a load sharing unit.

The IP packet forwarding device according to claim 9, wherein the application unit is at least two for processing different types of IP packets;

Each interface module is configured to: after receiving the IP packet, determine an application unit that processes the IP packet according to the destination address in the IP packet, and replace the destination address of the IP packet with the logical address set by the determined application unit, and the source is The address is replaced with the physical address of the public gateway interface and the IP packet is sent to the determined application unit.

The IP packet forwarding device according to claim 10, wherein the public gateway interface is provided with a hardware board and a dual backup of the port.

The IP packet forwarding device according to claim 7, wherein the correspondence relationship storage unit is configured to save a correspondence between a logical address of at least two application units and a physical address of the interface module, and the application unit Set the corresponding album address separately;

An interface module, configured to: interface with a physical address of the base station controller according to the logical address The correspondence between the IP packets is transmitted from outside the base station controller to the application unit determined by the determining unit, and/or the IP packets are transmitted from the application unit determined by the determining unit to the outside of the base station controller.

A base station controller, characterized in that the base station controller comprises: the IP packet forwarding device according to any one of claims 7-13.

The base station controller according to claim 14, wherein the application unit is a voice processing unit, a signaling processing unit, or a data processing unit.

The base station controller according to claim 14 or 15, wherein the base station controller is applied to the global digital mobile communication system GSM, or is applied to the CDMA system of the code division multiple access mobile communication system, or is applied to the broadband. The code division multiple access mobile communication system WCDMA is either applied to the code division multiple access mobile communication system CDMA2000 or to the time division duplex-synchronous code division multiple access TD-SCDMA mobile communication system.