KR100464155B1 - PCF IP Address Allocation Method For Connecting Packet Data Serving Node - Google Patents

Abstract

The present invention relates to a packet zone managed by a corresponding PCF when a PCF IP address is allocated from a simple IP for connection between a packet control function (PCF) and a packet data serving node (PDSN) in a packet data service network. The present invention relates to a method for allocating a PCF IP address for a PDSN connection, which is assigned and assigned, and is conventionally assigned according to a general IP address allocation method without an association between a packet zone and a PCF IP address of the packet zone. The handoff process is not only complicated, but also wastes unnecessary radio resources.

Therefore, in the packet data service network, the PCF of each packet zone assigns and assigns an association with a corresponding packet zone when allocating a PCF IP address used to establish a RP link connection with a PDSN. As the IP address allocation becomes possible and the target PCF can receive the PDSN IP address from the source PCF at the time of handoff, there is no additional resource usage for PPP negotiation between the mobile terminal and the PDSN.

Description

PCF IP Address Allocation Method For Connecting Packet Data Serving Node}

The present invention relates to the allocation of a packet control function (PCF) IP address from a simple IP in a packet data service network. In particular, the present invention relates to a PCF corresponding to a simple IP address allocation for a connection between a PCF and a packet data serving node (PDSN). The present invention relates to a method for allocating a PCF IP address for a PDSN connection by assigning an association with a packet zone managed by the MS.

Recently, due to the rapid technological development in the mobile communication field, a next generation wireless multimedia service such as video and multimedia transmission using a mobile phone has been provided, and a packet data service network for packet data processing has been proposed, which is illustrated in FIG. As shown, a base station 11 providing a wireless interface with a mobile terminal, a base station controller 12 for controlling the base station 11, and a base station controller 12 through a base station controller 12 A packet control function (PCF) 13 for directly connecting packet data with a PDSN (Packet Data Serving Node) 14 is provided. In addition, a voice service is provided through a base station controller 12. It includes a mobile exchanger 15.

At this time, the base station controller 12 is located between the base station 11 and the mobile switch 15 or the PCF 13 to perform resource allocation, call control, handoff control, voice and packet processing, and the like. Provides an interface between the base station controller 12 and the PDSN 14 to perform state (Active / Dormant) management for the packet data call.

In the aforementioned packet data service network, the packet data service connection of the mobile terminal is in an active state and an inactive state, where the inactive state is a state in which the mobile terminal cannot receive the packet data service, and the packet data service is activated by the terminal user. Transition to the active state.

In the packet data service active state, a connection establishment with the PDSN 14 is established such as a point-to-point link between the mobile terminal and the PDSN 14 and an RP link between the PCF 13 and the PDSN 14. Resource is allocated for a packet active state or a packet dormant state according to a state of a radio link, wherein the mobile terminal occupies a radio traffic channel and maintains a PPP link to transmit and receive packet data. The packet doping state is a state in which the radio traffic channel below the base station controller 12 is released to increase resource utilization when there is no RLP (Radio Link Protocol) data for a predetermined time. At this time, the PPP session and the R-P session are maintained.

Meanwhile, the conventional mobile terminal does not support the mobile IP because the mobile IP has a larger overhead than the simple IP, and thus the mobile terminal that does not support the mobile IP is in the packet doping state. If doment handoff occurs as a result of moving to a packet zone managed by another PCF, the corresponding mobile station may maintain a simple IP address, that is, a simple IP address of the PDSN to which the PCF of the existing packet zone is connected (ie, a PDSN). IP address).

However, in the conventional packet data service network, the subject of the handoff is a Call Control Processor (CCP) that performs resource allocation, call control, voice and packet processing, and the like. Since the PDSN IP address of the zone's PCF is not known and there is no correlation between the packet zone and the PCF IP address, the mobile terminal must perform the RP link connection procedure and PPP negotiation between the PCF and PDSN of the new packet zone where the mobile terminal is handed off. do.

For example, as shown in FIG. 2, when the mobile terminal in the packet doping state located in the first packet zone moves to the second packet zone, the PCF 21 of the first packet zone is in the packet doping state. (I.e., the PDSN IP address, which is the RP link connection information with the existing PDSN 22 (i.e., the source PDSN) that the source PCF was connecting to, passes to the PCF 23 (i.e., target PCF) of the second packet zone. In this case, the RP link connection with the existing PDSN 22 cannot be performed, and therefore, the PPP link between the mobile terminal and the source PDSN 22 cannot be maintained, so that the PDSN 24 of the corresponding mobile terminal and the second packet zone ( That is, a new PPP link connection procedure between the target PDSN and a RP link connection procedure between the target PCF 23 and the target PDSN 24 are performed. In this case, since the PPP link connection cannot be established in the packet doping state, the target PCF (23) is performed. Packet activation after establishing an RP link connection between After transition to the state, and after the mobile terminal and the target PCF 23 via the target PDSN (24) is allocated resources for establishing a PPP link connection, after completing the RP link connection to maintain the doping state Free up resources allocated for this purpose.

In summary, in the conventional packet data service network, the packet zone and the PCF IP address that allow the PCF of the packet zone to connect with the PDSN are allocated according to the general IP address allocation method. The target PCF does not know the PDSN IP address used by the source PCF, so resource allocation is required to release the RP link connection with the source PDSN and to establish an RP link with the target PDSN and a PPP link connection between the mobile terminal and the target PDSN. In this case, the allocated resources should be released to maintain the doping state after the PPP link connection establishment is completed. Therefore, the conventional doppant handoff process should perform a PPP link connection reestablishment procedure with the new PDSN. The handoff process is complex and additional resources for resetting the RP link connection and PDG negotiation with the PDSN. There is a problem that not only wastes unnecessary radio resources, but also generates overhead.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its object is to relate to the corresponding packet zone when assigning a PCF IP address used for PCF of each packet zone to establish a RP link connection with a PDSN in a packet data service network. By assigning and assigning, the PCF IP address can be allocated consistently at the network level, and based on this, the PCF of each packet zone can interoperate with each other to receive the PDSN IP address of the source PCF. To make it work.

Another object of the present invention is to provide an association between a packet zone and a PCF IP address so that the target PCF can receive the PDSN IP address of the source PCF, which is the source PDSN connection information, at the time of doment handoff. It is to prevent additional resource usage for PPP negotiation.

1 is a diagram schematically illustrating a general packet data service network.

2 is a diagram illustrating a network connection state for explaining a handoff procedure in a conventional packet data service network.

3 is a diagram illustrating a configuration of a PCF IP address for packet data serving node connection according to the present invention.

FIG. 4 is a diagram illustrating a network connection state for explaining a procedure for handoff handoff when using the PCF IP address shown in FIG.

Explanation of symbols on the main parts of the drawings

31: Source PCF 32: Source PDSN

33: target PCF 34: target PDSN

PCF IP address allocation method for packet data service node connection according to the present invention for achieving the above object, when the PCF allocates the PCF IP address used to connect to the PDSN in the packet data service network, Characterized in that the identification information of the packet zone to manage is assigned and assigned.

The PCF IP address includes network identification information to which a network class and a network number belonging to the PDSN to which the PCF of a specific packet zone belongs is assigned, PCF device identification information to determine a PCF connected to the PDSN, and each packet zone in the network. Packet zone identification information for determining

In this case, the PCF device identification information is variably assigned according to the configuration of a PCF managing a specific packet zone, and when one PCF manages the packet zone, one specific bit value is assigned. When N PCFs independently connected to the PDSN manage a packet zone, a bit value corresponding to each PCF may be assigned from '1' to 'N'.

In addition, the PCF device identification information is variably assigned according to the configuration of the PCF managing a specific packet zone, and the M slave processors that are independently connected to the different PDSN for each of the N master processors and each master processor, the packet zones. Manages the PCF device identification information by dividing the entire bit area into two, and then assigns the bit value corresponding to each master processor from '1' to 'N' in the upper bit area, and from 1 'to the lower bit area. It is characterized in that the bit value corresponding to each slave processor up to 'M'.

Further, the PCF IP address is assigned by the operator through the BSM block, characterized in that stored in the PLD of each PCF.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the packet data service network according to the present invention, when the PCF existing in the packet zone allocates the PCF IP address used to connect with the PDSN, the mobile terminal is assigned by assigning an association between the corresponding packet zone and the PCF IP address. During the handoff process, the target PCF receives the PDSN IP address used by the source PCF to perform doment handoff without using additional resources. The PCF IP address for this is illustrated in FIG. 3. It has a configuration including network ID information, device ID information, and packet zone ID information.

Here, the network identifier is information recorded in the upper octet as in the configuration of a general IP address, and is assigned a network class and a network number to which the PDSN to which the PCF of a specific packet zone belongs is connected. At this time, the network class has a size of 1 to 3 octets, which is 1 octet in class A, 2 octets in class B, and 3 octets in class C.

The device identifier is information provided to determine the PCF connected to the PDSN, and is differently assigned according to the configuration of the PCF managing the specific packet zone.

That is, first, when a single PCF manages a specific packet zone, any bit value may be assigned as an initialization, but should always be initialized to the same value, and it is preferable to assign '1'.

Second, when N PCFs connected to a PDSN independently manage a specific packet zone, bit values corresponding to each PCF are sequentially assigned from '1' to 'N'.

Third, when N * M PCFs managing a specific packet zone independently connected to different PDSNs, that is, N master processors PCP (Packet Control Processor) and M masters independently connected to PDSNs for each master processor When managed by a packet interface processor (PIP), which is a slave processor, the total bit area in which device identifier information is recorded is divided into two, and then the bit values corresponding to each master processor in the upper bit area are '1' through 'N' in that order. In the lower bit area, bit values corresponding to each slave processor from 1 'to' M 'are sequentially assigned.

In addition, the packet zone identifier is information provided to determine each packet zone existing in the packet data service network.

On the other hand, the above-mentioned PCF IP address is a value assigned by the operator through the base station manager (BSM) block, and stored in each processor loading data (PLD) of each PCF, where PLD is such as hardware configuration information, system constants, etc. A database containing unchanging data that is loaded into the system and used.

In the present invention, the PCF IP address is composed of a network identifier, a device identifier, and a packet zone identifier information so that a consistent IP address can be allocated at a network level, and the PCF IP address used by a specific PCF is managed by the PCF. When the packet handoff occurs between packet zones in the packet data service network as shown in FIG. 4, the PCFs 31 and 33 of the respective packet zones interoperate with the source PCF 31. As the PDSN IP address, that is, the source PDSN connection information can be transmitted from the target PCF 33, the PPC link connection between the mobile terminal and the source PDSN 32 is maintained. The RP link connection between the source PDSN 32 allows for handle handoff.

In addition, the embodiments according to the present invention are not limited to the above-described embodiments, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

As described above, in the packet data service network, the PCF of each packet zone assigns an association with a corresponding packet zone when allocating a PCF IP address used to establish a RP link connection with a PDSN. In addition to assigning a PDSN IP address, the PCF of each packet zone can interwork with each other when handing off a handoff so that the target PCF can receive the PDSN IP address of the source PCF.

In addition, the present invention provides an association between a packet zone and a PCF IP address so that the target PCF can receive the PDSN IP address of the source PCF, which is the source PDSN connection information, at the time of doment handoff, thereby negotiating PPP between the mobile terminal and the PDSN. No additional resource usage for this will occur.

Claims (6)

In the packet data service network, when the PCF allocates a PCF IP address used to connect with the PDSN, the PC IP address for connecting to the packet data serving node is assigned by assigning identification information of the packet zone managed by the PCF. Assignment method. The method of claim 1, The PCF IP address determines network identification information to which a network class and a network number belonging to a PDSN to which a PCF of a specific packet zone belongs is assigned, a PCF device identification information for determining a PCF connected to a PDSN, and each packet zone within a network. And a packet zone identification information for the packet data serving node connection. The method of claim 2, The PCF device identification information is variably assigned according to the configuration of a PCF managing a specific packet zone, and when a single PCF manages the packet zone, one specific bit value is assigned. How to assign a PC IP address for the connection. The method of claim 2, The PCF device identification information is variably assigned according to the configuration of a PCF managing a specific packet zone, and each PCF is '1' to 'N' when N PCFs independently connected to the PDSN are managed by the packet zone. And assigning a bit value corresponding to PFC IP address allocation method for packet data serving node connection. The method of claim 2, The PCF device identification information is variably assigned according to the configuration of a PCF managing a specific packet zone, and the packet zone is managed by N master processors and M slave processors independently connected to different PDSNs for each master processor. In this case, after dividing the entire bit area where PCF device identification information is recorded into two, the upper bit area is given a bit value corresponding to each master processor from '1' to 'N', and the lower bit area is 1 'to' M '. A method for allocating a PC IP address for a packet data serving node connection, wherein a bit value corresponding to each slave processor is assigned. The method of claim 1, The PCF IP address is allocated by the operator through a BSM block, the PCF IP address allocation method for packet data serving node, characterized in that stored in the PLD of each PCF.