KR100494366B1 - Method for Managing Port Registration of Forward Packet Data Service - Google Patents

Abstract

The present invention relates to a forward packet data service port registration management method in an 1xEV (Evolution) -DO (Data Only) system, the method comprising: receiving a service stop request message including port information from a base station; Checking whether a port number of a base station which has transmitted the service stop request message is identical to a pre-registered serving scheduled port number; If the port number of the base station which has transmitted the service stop request message is the same as the pre-registered serving scheduled port number, canceling the scheduled packet data service through the base station by deleting the serving scheduled port number; do.

According to the present invention, when a control station serving a forward packet data service receives a service interruption request message from a serving base station, the present invention checks this and deletes the corresponding serving scheduled port registration, thereby causing a serving base station mismatch between the mobile terminal and the controlling station operating in a hybrid mode. As a result, the service is interrupted, thereby preventing the data throughput from being lowered.

Description

Method for Managing Port Registration of Forward Packet Data Service

The present invention relates to a forward packet data service port registration management method in an 1xEV (Evolution) -DO (Data Only) system. In particular, the present invention provides a stable packet data service for a mobile communication terminal operating in a hybrid mode through an effective service port change. It is about a method.

In general, a forward packet data service that downloads packet data received from a packet data serving node (PDSN) in a 1xEV-DO system to a mobile terminal through a base station is performed by the corresponding terminal among base stations adjacent to the mobile terminal. Through a base station that is optimally determined for reception.

That is, the mobile communication terminal measures the strength of pilot signals transmitted by neighboring base stations, selects the base station having the largest strength of the corresponding signal, stores the corresponding base station identifier in the DRC cover of the DRC channel, and stores the neighboring base station. To the network.

The optimal base station among the base stations receiving the DRC cover transmits a service request message containing its port information to the control station, and the base station currently serving packet data transmits a service stop request message to the control station.

The control station provides packet data service to the mobile communication terminal through the corresponding port while managing the forward packet data service port registration. That is, the control station provides a packet data service to the mobile communication terminal through a base station having a port registered as a serving port (hereinafter referred to as a "serving base station"), and a service stop request message is received from the serving base station and goes to a serving scheduled port. When a service request message is received from a base station having a registered port (hereinafter, referred to as a "serving base station"), the serving port is updated from the port of the serving base station to the port of the serving base station and registered through the changed base station (formerly serving base station). Provide packet data service.

For example, the control station registers the port (port number 2) of the second base station as the serving scheduled port when a service request message is received from the second base station rather than the serving base station (first base station). Then, the second base station becomes a serving base station to provide a packet data service to the mobile communication terminal.

Then, when a service stop request is received from the first base station serving base station, the serving port is changed from the port (port number 1) of the first base station to the port (port number 2) of the second base station serving serving base station. Provides packet data service through

In addition, the control station stops the current packet data service when the service stop request message is received from the first base station, which is the serving base station. ) Is changed to a port (port number 2) of the second base station to provide a packet data service through the second base station.

However, the control station ignores the service request message from the serving base station or the service stop request message from a base station other than the serving base station as a message due to an error.

Meanwhile, the mobile communication terminal may operate in a hybrid mode of 1x scheme for voice service and 1xEV-DO scheme for packet data service. That is, the mobile communication terminal can access the system in the 1xEV-DO scheme and receive packet data service, and periodically monitor the voice call by accessing the system in the 1x scheme.

The monitoring period is determined according to the slot cycle index value of the mobile communication terminal. For example, if the slot cycle index value is 1, monitoring is performed every 2.6 seconds, and the monitoring time is about 300 to 400 msec. During this time, the packet data service is stopped.

Therefore, according to the aforementioned service port registration management method, when the mobile communication terminal operates in a hybrid mode, there is a case where a base station which the terminal wants to receive packet data service and a serving base station managed by the control station do not match.

For example, when a mobile communication terminal receiving a packet data service through a first base station temporarily transmits a DRC cover for a second base station due to a change in service environment, and then again transmits a DRC cover for the first base station. The second base station receiving the DRC cover sends a service request message to the control station, and the control station receives the service request message from the second base station during the service through the first base station, so that the port of the second base station is transferred to the serving scheduled port. Register.

Then, according to the DRC cover transmission to the first base station of the mobile communication terminal, the first base station serving as the serving base station transmits the service request message to the control station, and the second base station serving serving base station sends the service stop request message to the control station. Send by

However, the control station considers the messages as duplicates as service request messages from the serving base station and ignores them as error messages as service stop request messages from the non-service serving base station. Thus, the current serving base station is the first base station and the serving base station is still the second base station.

At this time, when the mobile terminal operates in the hybrid mode and transitions to the 1x scheme, the first base station serving as the serving base station transmits a service stop request message to the control station. The control station then changes the serving port to the port of the second base station, which is the serving base station, so that the second base station becomes the serving base station.

Therefore, from this moment, the base station (first base station) to which the mobile communication terminal wants to receive packet data service and the serving base station (second base station) managed by the control station are inconsistent and the packet data service is interrupted, which causes the data throughput rate. The problem is that (throughput) is degraded.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The object of the present invention is to check if a service stop request message is received from a serving base station at a control station serving a forward packet data service, thereby deleting the corresponding serving scheduled port registration, It is to prevent service interruption caused by mismatch of serving base station between communication terminal and control station.

A forward packet data service port registration management method of the present invention for achieving the above object comprises the steps of: receiving a service stop request message including port information from a base station; Checking whether a port number of a base station which has transmitted the service stop request message is identical to a pre-registered serving scheduled port number; If the port number of the base station which has transmitted the service stop request message is the same as the pre-registered serving scheduled port number, canceling the scheduled packet data service through the base station by deleting the serving scheduled port number; do.

Checking whether the port number of the base station which has transmitted the service stop request message is the same as the previously registered serving port number; If the port number of the base station that has transmitted the service stop request message is the same as the registered serving port number, the method may further include deleting the serving port number and stopping packet data service through the base station.

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

1 is a diagram illustrating a schematic configuration of a 1xEV-DO system to which a method of managing a forward packet data service port registration according to the present invention is applied. Referring to FIG. 1, the 1xEV-DO system includes a mobile communication terminal 10, base stations 21 to 23, a control station 30, and a PDSN 40, and provides a voice service to the mobile communication terminal 10. In this case, the mobile switching center 50 is connected to the control station 30.

The mobile communication terminal 10 operates in a hybrid mode of 1x scheme for voice service and 1xEV-DO scheme for packet data service. That is, the mobile communication terminal 10 accesses the system by the 1xEV-DO method and receives the packet data service, and periodically connects to the system by the 1x method and monitors whether a voice call is coming.

The base station 21 to 23 and the control station 30 adds a separate device for packet data service to the IS-2000 device, which is an existing voice service, and connects the mobile communication terminal 10 to be connected in an IS-2000 manner. The mobile communication terminal 10 connected to the network 50 to provide a voice service, and is connected to the packet communication network or the Internet without passing through the mobile switching center 50 having strong circuit switching network characteristics, is connected to the mobile communication terminal 10 connected in a 1xEV-DO manner. By directly connecting to the processing PDSN 40, the packet data service is maximized.

In the forward packet data service of the packet data service, the mobile communication terminal 10 determines the base stations 21 to 23 that are optimal for receiving packet data, and transmits them to the base stations 21 to 23 using the DRC cover. do. That is, the signal to noise ratio (SNR) of the pilot channel transmitted from the base stations 21 to 23, that is, the carrier to interference (C / I) is measured, and then the optimal base stations 21 to 23 are served. And the serving base station identification information is stored in the DRC cover of the DRC channel, which is a type of the reverse channel, and transmitted to the base stations 21 to 23.

The base stations 21 to 23 receive the DRC cover received from the mobile communication terminal 10, and the base stations 21 to 23 determined as the serving base station transmit the service request message including their port number to the control station 30. The base stations 21 to 23, which are currently serving base stations, transmit to the control station 30 a service stop request message including their port number.

The control station 30 manages the service port registration, and transmits the service stop request message to the serving port when the base stations 21 to 23 change due to the handoff of the mobile communication terminal 10. The port of ˜23 is changed to the port of the base stations 21 to 23 that have transmitted the service request message, and the packet data service is provided to the mobile communication terminal 10 through the changed base stations 21 to 23.

2 is a flowchart illustrating an operation of changing a forward packet data service port of a control station 30 according to an embodiment of the present invention.

Referring to FIG. 2, the control station 30 checks the types of messages received from the base stations 21 to 23 (S201 and S202), and if the received message is a service request message, the corresponding base stations 21 to 23. In step S203, it is determined whether a traffic connection identifier is registered.

The traffic connection identifier is set to 0 when the packet data service is in a suspended state and is registered with a value for identifying the connection when in service.

As a result of the check (S203), if the traffic connection identifier is not registered, the corresponding port is registered as a serving port using the reception port number received in the service request message to start the corresponding packet data service (S204). The traffic connection identifier is registered using the connection identification value between the base stations 21 to 23 that have transmitted the service request message, and the packet data service is started through the corresponding base stations 21 to 23 (S205).

However, if it is determined in step S203 that the traffic connection identifier is registered, it is checked whether the receiving port number is the same as the serving port number (S206).

If the receiving port number is the same as the serving port number, this is a duplicate service request message from the serving base station, and thus ignores it. If not, the corresponding port is registered as the serving scheduled port using the receiving port number (S207).

On the other hand, if the message received from the base stations 21 to 23 is the service stop request message (S208), it is checked whether the receiving port number is the same as the serving port number (S209).

If the receiving port number is different from the serving port number, the check result (S209), this is a service stop request from the base station (21 ~ 23), not the serving base station, but as before, the receiving port number is again serving port without ignoring this Check whether it is the same as the number (S210), and if it is the same, since this is a service stop request from the serving base station, the serving scheduled port registration is deleted (S211).

On the other hand, as a result of checking whether the receiving port number and the serving port number are the same (S209), when the receiving port number is the same as the serving port number, since this is a service stop request from the serving base station, the traffic connection identifier is set to 0 to register the traffic connection identifier. Delete and stop the packet data service through the base station (21 ~ 23) (S212).

If the serving scheduled port is registered (S213), if the serving scheduled port is registered, that is, if the serving scheduled base station exists, the serving port is registered using the receiving port number (S214), and the serving After deleting the scheduled port registration (S215), the traffic connection identifier is registered as the traffic connection identification value between the serving scheduled base stations to provide a packet data service through the corresponding base stations 21 to 23 (S216).

As described above, when the serving port is changed, the control station 30 ignores this when receiving the service stop request message from the base stations 21 to 23 rather than the serving base station. However, in the present invention, the base station 21 to 23 that has transmitted the service stop request message has been ignored. ), If the same is determined by comparing the port number and the scheduled serving port number, that is, the service stop request from the serving scheduled base station, the corresponding base stations 21 to 23 are no longer likely to be serving base stations. Delete it.

3 illustrates an embodiment of the present invention in which a mobile communication terminal 10 operating in a hybrid mode receives a packet data service through a first base station 21 and then instantly changes a second base station 22 due to a change in service environment. A control flow diagram illustrating a service port change operation in the case of transmitting a DRC cover for the first base station 21 after transmitting the DRC cover for the second base station 21.

Referring to FIG. 3, first, the mobile communication terminal 10 transmits a DRC cover (DRC cover 1) for the first base station 21 to the base stations 21 and 22 (S301). Upon receiving the DRC cover, the first base station 21 transmits a service request message including its port number (port number 1) to the control station 30 (S302).

Receiving the service request message, the control station 30 registers the serving port using the reception port number (port number 1) included in the message, and uses the traffic connection identifier between the first base station 21 to establish a traffic connection identifier. Register (S303), and provide a packet data service to the mobile communication terminal 10 through the first base station 21 (S304, S305).

Thereafter, according to the change in the service environment, the mobile communication terminal 10 transmits a DRC cover (DRC cover 2) for the second base station 22 to the base stations 21 and 22 (S306). Receiving the DRC cover, the second base station 22 transmits a service request message including its port number (port number 2) to the control station 30 (S307). Thus, the control station 30 registers the serving scheduled port by using the reception port number (port number 2) indicated in the message (S308).

Thereafter, when the mobile communication terminal 10 transmits the DRC cover (DRC cover 1) for the first base station 21 to the base stations 21 and 22 again according to the change in the service environment (S309), the second base station 22 ) Transmits a service stop request message including its own port number (port number 2) to the control station 30 (S310).

Then, the control station 30 deletes the serving scheduled port registration registered with the port number 2 using the receiving port number (port number 2) indicated in the message (S311).

After that, when the mobile communication terminal 10 switches to the 1x mode (S312), the first base station 21 serving as the serving base station sends a service stop request message including its port number (port number 1) to the control station 30. In step S313, the control station 30 sets the traffic connection identifier to 0 to delete the traffic connection identifier registration to stop the packet data service (S314).

When the mobile communication terminal 10 switches back to the 1xEV-DO mode (S315), the first base station 21 sends a service request message including its port number (port number 1) to the control station 30. In step S316, the control station 30 registers the traffic connection identifier using the traffic connection identification value between the first base stations 21, and resumes the packet data service through the first base station (S317).

In addition, the embodiment according to the present invention is not limited to the above description, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

As described above, according to the present invention, when the control station serving the forward packet data service receives the service interruption request message from the base station for service, it checks this and deletes the corresponding serving scheduled port registration, thereby, between the mobile communication terminal and the control station operating in the hybrid mode. There is an effect of preventing the service interruption due to the serving base station mismatch, thereby reducing the data throughput.

1 is a schematic diagram of a 1xEV-DO system.

2 is a flowchart illustrating a service port registration management operation according to the present invention;

3 is a message flow diagram for service port registration management according to the present invention;

Explanation of symbols on the main parts of the drawings

10: mobile communication terminal 21 ~ 23: base station

30 control station 40 PDSN

50: mobile switching center

Claims (2)

In the case of providing a forward packet data service to a mobile communication terminal, a method of registering and managing a forward packet data service port for registering and managing a service port for a base station providing a forward packet data service to the mobile communication terminal. In Receiving a service stop request message including port information from a base station; Checking whether a port number of a base station which has transmitted the service stop request message is identical to a pre-registered serving scheduled port number; If the port number of the base station which has transmitted the service stop request message is the same as the pre-registered serving scheduled port number, canceling the scheduled packet data service through the base station by deleting the serving scheduled port number; The forward packet data service port registration management method. The method of claim 1, Checking whether a port number of a base station which has transmitted the service stop request message is identical to a pre-registered serving port number; If the port number of the base station that has transmitted the service stop request message and the registered serving port number are the same, deleting the serving port number and stopping the packet data service through the base station; How to manage packet data service port registration.