KR20080080826A - Hand-off method of cellular phone for both 1x and 1x ev-do - Google Patents

Abstract

A handoff method in a terminal used for both a 1x network and a 1x EV-DO(Evolution Data Only) network is provided to shorten call connection time as compared with reestablishing a call in a 1x network by automatically executing handoff to the 1x network having a normal strength in case a terminal transits to a dormant state as 1x EV-DO signals get weak or the use of data is interrupted while the terminal is using a 1x EV-DO data call. If a terminal and a PDSN(Packet Data Serving Node) transit to a dormant state as 1x EV-DO signals get weak or data transmission is interrupted while the terminal is using a 1x EV-DO data call through a 1x EV-DO network, the terminal transmits an ORM(Origination Message) to a base station of a 1x network and attempts handoff to the 1x network(S101). Receiving the ORM, the base station sets a DRI(Data Ready Indicator) to '1', and transmits an A9-Setup-A8 message to a PCF(Packet Control Function)(S102). The PCF transmits an A11-registration request message to the PDSN and establishes an A10 connection with the PDSN(S103). The PDSN transmits an A11-registration update message to a PCF of the 1x EV-DO network, receives an A11-registration acknowledge message from the PCF, and closes the A10 connection with the PCF(S104). The PCF in the 1x network transmits an A11-registration request message(Lifetime=0) to the PDSN, receives an A11-registration reply message from the PDSN, and completely releases the A10 connection with the PDSN(S105).

Description

HAND-OFF METHOD OF CELLULAR PHONE FOR BOTH 1X AND 1X EV-DO}

1 is a block diagram showing a handoff process from a 1x EV-DO network to a 1x network of a 1x and 1x EV-DO combined terminal according to an embodiment of the present invention;

2 is an operation flowchart illustrating a handoff method of a 1x and 1x EV-DO dual terminal according to an embodiment of the present invention;

FIG. 3 is an operation flowchart illustrating a processing process of a 1x and 1x EV-DO dual terminal 400 in the handoff method of the 1x and 1x EV-DO dual terminal according to FIG. 2;

FIG. 4 is an operational flowchart illustrating a process of entering a 1x network 200 in the handoff method of a 1x and 1x EV-DO dual terminal according to FIG. 2;

5 is an operation flowchart showing a handoff method of a 1x and 1x EV-DO dual terminal according to this embodiment of the present invention;

FIG. 6 is an operation flowchart illustrating a processing process of a 1x and 1x EV-DO dual terminal 400 in the handoff method of the 1x and 1x EV-DO dual terminal according to FIG. 5;

FIG. 7 is an operation flowchart illustrating a processing process of a 1x network 200 in the handoff method of a 1x and 1x EV-DO dual terminal according to FIG. 5.

<Explanation of symbols for the main parts of the drawings>

100: 1x EV-DO dual terminal 200: 1x EV-DO network

201: AN 202: PCF

300: 1x network 301: base station

302: PCF 400: PDSN

The present invention relates to a handoff method for a 1x and 1x EV-DO (CDMA2000 1x EVolution Data Only) combined terminal. More specifically, the 1x EV-DO signal is weak or the data is suspended during the 1x EV-DO data call. And a terminal transition to a Dormant state, the present invention relates to a handoff method of a 1x and 1x EV-DO dual terminal which automatically advances a handoff to a 1x network having a normal intensity. .

Recently, many studies have been conducted to enable high-speed data transmission in a code division multiple access (CDMA) mobile communication system. A representative mobile communication network having a channel structure for dual high-speed data transmission is a 1x EV-DO network. . In this case, the 1x EV-DO system is a mobile communication system of the high data rate (HDR) standard proposed by 3GPP2 (3rd Generation Partnership Project 2) to supplement the data communication of the IS-2000 system.

In other words, 1x EV-DO adds data-only high-speed packet network to existing voice-oriented CDMA network to support data transmission speed up to 3.1Mbps, and includes high-definition video-on-demand (VOD) service through video phone or terminal. It enables to realize various multimedia services.

At this time, the coverage of the aforementioned 1x EV-DO network has much narrower coverage than that of the 1x network that has been established for more than 10 years. Therefore, when the terminal is in a 1x EV-DO data call and the 1x EV-DO signal is weakened and the data call transitions to the Dormant state, when the handoff is performed to the 1x network with wide coverage, the data call can be stably maintained. Can be.

However, conventionally, not only the PDSN of 1x network and PDSN of 1x EV-DO system are separated, but also there is no interface for direct communication between the two PDSNs, so that the terminal has 1x network in 1x EV-DO network. The handoff process was not supported at all when moving to, which caused a problem of resetting a new call to 1x network.

Under these circumstances, 1x and 1x EV-DO data calls can now be handled by one PDSN by supplying a large capacity PDSN. In addition, an interface between PDSNs has been developed. As long as the process of requesting and processing handoffs is clearly defined, the technology has evolved from the 1x EV-DO to the 1x network. However, the present technology does not accurately describe the operation procedure of the terminal when the terminal is handed off from the 1x EV-DO network to the 1x network, and thus there is a problem in that the terminal cannot be applied to a practical handoff method.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is that the 1x EV-DO signal is weak or the data is stopped while the 1x EV-DO data call is used, and thus the terminal is doped. In the case of a transition, by automatically proceeding the handoff to the 1x network having normal strength, the call connection time can be shortened by 7 seconds or more compared to the case of resetting the call in the 1x network, which results in a data call instantaneous disconnection time. Another object of the present invention is to provide a handoff method of a 1x and 1x EV-DO terminal for minimizing downtime to improve data call quality.

In order to achieve the above object, the handoff method of the present invention 1x and 1x EV-DO combined terminal, 1x EV-DO network having a PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal,

During 1x EV-DO data call connection, 1x EV-DO signal is weak and data reception error rate is increased, or data transmission is interrupted due to timeout, so the 1x and 1x EV-DO dual terminal and PDSN transition to doping state. Step 101, when the terminal recognizes that the 1x signal is good, transmits an initiation message (ORM) to the base station of the 1x network and attempts a handoff from the 1x EV-DO network to the 1x network;

Step 102, the base station of the 1x network transmits a message (A9-Setup-A8) for setting up A9 and A8 interfaces to the PCF of the 1x network;

Step 103, wherein the PCF of the 1x network transmits an A11 Registration Request message to the PDSN to establish an A10 connection with the PDSN;

Step 104, the PDSN terminating the A10 connection through communication with the PCF of the 1x EV-DO network; And

Step 105, wherein the PCF of the 1x network completely releases the A10 connection with the PDSN through communication with the PDSN to complete a handoff from the 1x EV-DO network of the terminal to the 1x network. do.

In addition, the handoff method of the present invention 1x and 1x EV-DO combined terminal, 1x EV-DO network having a PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal,

The 1x and 1x EV-DO combined terminals have a weak 1x EV-DO signal during a 1x EV-DO data call connection to increase the data reception error rate or stop data transmission due to timeout. A step 201 of checking whether or not the state has been changed;

When the current state of the terminal transitions to the doping state in step 201, the terminal recognizes that the 1x signal is good and then attempts to transmit by transmitting an initiation message (ORM) to the base station of the 1x network. Step 202, attempting a handoff from the DO network to the 1x network; And

When the terminal completes the handoff from the 1x EV-DO network to the 1x network, step 203 is performed for performing a data call connection with the 1x network.

On the other hand, the handoff method of the present invention 1x and 1x EV-DO combined terminal, 1x EV-DO network having a PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal,

During 1x EV-DO data call connection, 1x EV-DO signal is weak and data reception error rate is increased, or data transmission is interrupted due to timeout, so the 1x and 1x EV-DO dual terminal and PDSN transition to doping state. In step 301, upon receiving the start message (ORM) from the terminal, the base station of the 1x network transmits a message for setting up the A9 and A8 interfaces (A9-Setup-A8) to the PCF of the 1x network;

Step 302, wherein the PCF of the 1x network transmits an A11-Registration Request to the PDSN to establish an A10 connection with the PDSN; And

When the A10 connection with the PDF and the PCF of the 1x EV-DO network is terminated, the PCF of the 1x network completely releases the A10 connection with the PDSN through communication with the PDSN, and thus, in the 1x EV-DO network of the terminal. And step 303 of completing the handoff to the 1x network.

In addition, the handoff method of the present invention 1x and 1x EV-DO combined terminal, 1x EV-DO network having a PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal,

During a 1x EV-DO data call connection at cell boundaries of 1x EV-DO network and 1x network, the data reception error rate increases above the reference value, or the transmission rate falls below the reference value, while the pilot strength of the 1x network If received above the reference value, the terminal recognizes that the 1x signal is good, and then sends a start message (ORM) to the base station of the 1x network to attempt a handoff from the 1x EV-DO network to the 1x network 401 step;

Step 402, the base station of the 1x network transmits a message (A9-Setup-A8) for setup of A9 and A8 interfaces to the PCF of the 1x network;

Step 403, the PCF of the 1x network transmits an A11 Registration Request message to the PDSN to establish an A10 connection with the PDSN;

Step 404, the PDSN terminating the A10 connection through communication with the PCF of the 1x EV-DO network; And

The PCF of the 1x network completely releases the A10 connection with the PDSN through communication with the PDSN, thereby completing a handoff from the 1x EV-DO network of the terminal to the 1x network. It is done.

On the other hand, the handoff method of the present invention 1x and 1x EV-DO combined terminal, 1x EV-DO network having a PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal,

During the 1x EV-DO data call connection between the 1x and 1x EV-DO combined terminal at the cell boundary between the 1x EV-DO network and the 1x network, the data reception error rate is increased above the reference value or the transmission rate is lower than the reference value. Dropping, while checking whether the pilot strength of the 1x network has been received above the reference value;

If the data reception error rate of the 1x EV-DO network increases above the reference value or the transmission rate falls below the reference value, while the pilot strength of the 1x network is received above the reference value, the terminal has a good 1x signal. Step 502, attempting a handoff from the 1x EV-DO network to the 1x network by transmitting an initiation message (ORM) to the base station of the 1x network after recognizing the message; And

When the terminal completes the handoff from the 1x EV-DO network to the 1x network, step 503 performs a data call connection with the 1x network.

In addition, the handoff method of the present invention 1x and 1x EV-DO combined terminal, 1x EV-DO network having a PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal,

During a 1x EV-DO data call connection at cell boundaries of 1x EV-DO network and 1x network, the data reception error rate increases above the reference value, or the transmission rate falls below the reference value, while the pilot strength of the 1x network As received above the reference value, when receiving the start message (ORM) from the terminal, the base station of the 1x network transmits a message (A9-Setup-A8) for the A9 and A8 interface setup to the PCF of the 1x network Step 601;

Step 602, wherein the PCF of the 1x network sends an A11 registration request message to the PDSN to establish an A10 connection with the PDSN; And

When the A10 connection with the PDSN and the PCF of the 1x EV-DO network is terminated, the PCF of the 1x network completely releases the A10 connection with the PDSN through communication with the PDSN, and thus, in the 1x EV-DO network of the terminal. And step 603 of completing the handoff to the 1x network.

Hereinafter, a handoff method of a 1x and 1x EV-DO dual terminal according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a handoff process from 1x EV-DO to 1x network of a 1x and 1x EV-DO dual terminal according to an embodiment of the present invention, which is a 1x and 1x EV-DO dual terminal 100 , 1x EV-DO network 200 with Access Network (AN) 201 and Packet Control Function (PCF) 202, 1x network 300 with base station 301 and PCF 302, PDSN It consists of 400.

When the 1x and 1x EV-DO dual terminal 100 moves to a cell boundary or shadow area of the 1x EV-DO network 200 during a 1x EV-DO data call connection, an increase or a timeout of a data reception error rate is increased. The data transmission is interrupted due to a timeout, so that the terminal 100 and the PDSN 400 transition to a Dormant state. At this time, when the terminal 100 transitions to the state of the drawing, the radio channel between the AN 201 and the terminal 100 of the 1x EV-DO network 200 is released, but the IP address of the terminal 100 PPP information, including, is maintained as is.

The terminal currently being used is composed of only 1x and 1x and 1x EV-DO terminals, and the network side to support the handoff from 1x EV-DO network 200 to 1x network 300 It is necessary to know whether the terminal requesting the handoff is a terminal supporting only 1x or a terminal supporting both 1x and 1x EV-DO. Therefore, the terminal applied to the present invention is a terminal 100 supporting both 1x and 1x EV-DO.

In addition, the condition that the 1x and 1x EV-DO combined terminal 100 requests a handoff from the 1x EV-DO network 200 to the 1x network 300 is a weak 1x EV-DO signal, resulting in a data reception error rate. Not only when the data transfer is interrupted due to an increase or a timeout and the PDSN 400 transitions to itself, but also when the 1x EX-DO data call is active.

On the other hand, the 1x and 1x EV-DO combined terminal 100 recognizes that the 1x signal is good when it is determined that the current situation is a handoff request condition from the 1x EV-DO network 200 to the 1x network 300. After attempting to transmit by sending an origination message (ORM: Origination Message) to the base station 301 of the 1x network 300, and attempts a handoff from 1x EV-DO network 200 to 1x network 300 After the handoff is completed, a data call connection with the 1x network 300 is performed.

In this case, the terminal 100 to notify that the 1x and 1x EV-DO combined terminal 100 requesting the dome handoff from the 1x EV-DO network 200 to the 1x network 300, the start The fourth bit (IS-54 Power Class) of SCM (Station Class Mark) of the message (ORM) is set to '1' and the DRS is also set to '1' and transmitted to the network. Here, the fourth bit (IS-54 Power Class) of the SCM is a bit used for TDMA, and the domestic terminal is currently set to '0' and its use is in a dead state. It is compliant and can be used without side effects. In addition, even if the terminal 100 is a 1x and 1x EV-DO combined terminal, when the existing call starts in the 1x network 300 and is handed off to the 1x network 300, the fourth of the SCM of the initiation message (ORM) is performed. Bit (IS-54 Power Class) should be set to '0' and transmitted to the network.

Meanwhile, when the PCF 202 of the 1x EV-DO network 200 is handed off from the 1x EV-DO network 200 to the 1x network 300 of the 1x and 1x EV-DO dual terminal 100, When receiving the A11 registration update message (A11-Registration Update) that is the A10 connection termination request message from the PDSN (400) serves to send a response message (A11-Registration Acknowledge) to the PDSN (400).

In addition, the base station 301 of the 1x network 300 when the handoff from the 1x EV-DO network 200 of the 1x and 1x EV-DO combined terminal 100 to the 1x network 300, the terminal ( When receiving the initiation message (ORM) from the 100, it serves to send a message (A9-Setup-A8) for the A9 and A8 interface setup to the PCF (302).

On the other hand, the PCF 302 of the 1x network 300 when the handoff from the 1x EV-DO network 200 of the 1x and 1x EV-DO combined terminal 100 to the 1x network 300, the base station ( Upon receiving a message for setting up the A9 and A8 interfaces (A9-Setup-A8) from 301, an A11 registration request message is transmitted to the PDSN 400 to connect to A10 with the PDSN 400. Then, to transmit the A11 registration request message (A11-Registration Request) (Lifetime = 0) to the PDSN 400 in order to completely release the A10 connection with the PDSN 400, and then from the PDSN 400. This function receives a response message (A11-Registration Reply) (Lifetime = 0, accept).

In addition, the PDSN 400 is handed off from the 1x EV-DO network 200 of the 1x and 1x EV-DO combined terminal 100 to the 1x network 300, the 1x EV-DO network 200 In order to terminate the A10 connection with the PCF 202 of the A11-Registration Update (A11-Registration Update) is transmitted to the PCF 202 of the 1x EV-DO network 200 to request the end of the A10 connection, and then A function of receiving a response message (A11-Registration Acknowledge) from the PCF 202 of the 1x EV-DO network 200 is returned.

Next, a handoff method of the 1x and 1x EV-DO dual terminal according to an embodiment of the present invention applied to the 1x and 1x EV-DO networks having the above configuration will be described with reference to FIG. 2.

First, during the 1x EV-DO data call connection, the 1x EV-DO signal is weak and the data reception error rate is increased, or data transmission is interrupted due to timeout. Thus, the 1x and 1x EV-DO dual terminal 100 and the PDSN ( When the 400 transitions to the doping state, the terminal 100 recognizes that the 1x signal is good, and then transmits an initiation message (ORM) to the base station 301 of the 1x network 300 to transmit the 1x EV-DO network. In step 200, a handoff is attempted to the 1x network 300 (S101). At this time, the terminal 100 sets the fourth bit (IS-54 Power Class) of the SCM of the initiation message (ORM) to '1' to inform that the terminal is a 1x and 1x EV-DO dual terminal, and at the same time, the DRS Also set to '1' and transmit.

Then, the base station 301 of the 1x network 300 sets the data preparation indicator (DRI) to '1' and transmits a message (A9-Setup-A8) for setting up the A9 and A8 interfaces to the PCF 302. In operation S102, the PCF 302 transmits an A11 registration request message to the PDSN 400 to establish an A10 connection with the PDSN 400 (S103).

Meanwhile, the PDSN 400 sends an A11 Registration Update message to the PCF 202 of the 1x EV-DO network 200 to request termination of the A10 connection, and then, from the PCF 202. In response to the response message (A11-Registration Acknowledge), the A10 connection is terminated (S104).

Then, the PCF 302 of the 1x network 300 transmits an A11 Registration Request message (Lifetime = 0) to the PDSN 400, and then responds to it from the PDSN 400. (A11-Registration Reply) (Lifetime = 0, accept) is returned, and the A10 connection with the PDSN 400 is completely released (S105).

On the other hand, in the following description with reference to Figure 3 for the process of the 1x and 1x EV-DO dual terminal 100 in the handoff method of the 1x and 1x EV-DO dual terminal according to an embodiment of the present invention. Let's do it.

First, the 1x and 1x EV-DO dual terminal 100 has a weak 1x EV-DO signal during a 1x EV-DO data call connection to increase a data reception error rate or stop data transmission due to a timeout. And it is checked whether or not the 1x EV-DO combined terminal 100 and the PDSN 400 transition to the doping state (S201).

At this time, when the 1x and 1x EV-DO combined terminal 100 and the PDSN 400 transition to the doping state (YES) in step 201 (SES), the terminal 100 indicates that the 1x signal is good. After recognizing and attempting to transmit by transmitting an initiation message (ORM) to the base station 301 of the 1x network 300, it attempts a handoff from the 1x EV-DO network 200 to the 1x network 300 ( S202). Herein, the terminal 100 sets the fourth bit (IS-54 Power Class) of the SCM of the initiation message (ORM) to '1' to inform that the terminal is a 1x and 1x EV-DO dual terminal. Also set to '1' and transmit.

After that, when the handoff from the 1x EV-DO network 200 to the 1x network 300 is completed, the terminal 100 performs a data call connection with the 1x network 300 (S203). Accordingly, data is transmitted toward the PDSN 400 → 1x PCF 302 → 1x base station 301 → terminal 100.

On the other hand, if the data reception error rate increases above the reference value or the transmission rate does not fall below the reference value in step 201 (S201) (NO), the terminal 100 is a 1x EV-DO network 200 The data call connection with the server is maintained (S204).

On the other hand, in the following description of the process in the position of the 1x network 200 in the handoff method of the 1x and 1x EV-DO combined terminal according to an embodiment of the present invention will be described with reference to FIG.

First, during the 1x EV-DO data call connection, the 1x EV-DO signal is weak and the data reception error rate is increased, or data transmission is interrupted due to timeout. Thus, the 1x and 1x EV-DO dual terminal 100 and the PDSN ( As 400 transitions to the dormant state, when receiving the start message (ORM) from the terminal 100, the base station 301 of the 1x network 300 sets the data preparation indicator (DRI) to '1'. In step S301, a message A9-Setup-A8 for setting up the A9 and A8 interfaces is transmitted to the PCF 302 of the 1x network 300.

Then, the PCF 302 receives the message for setting up the A9 and A8 interfaces (A9-Setup-A8) from the base station 301, and then sends an A11 Registration Request message (A11-Registration Request) to the PDSN 400. In step S302, the A10 connection with the PDSN 400 is established.

Then, when the A10 connection with the PCSN 202 of the PDSN 400 and the 1x EV-DO network 200 is terminated, the PCF 302 of the 1x network 300 sends an A11 Registration Request message (A11-Registration Request). (Lifetime = 0) is transmitted to the PDSN 400, and then A11-Registration Reply (Lifetime = 0, accept) is returned from the PDSN 400 to completely release the A10 connection ( S303).

Meanwhile, a handoff method of a 1x and 1x EV-DO dual terminal according to this embodiment of the present invention will be described with reference to FIG. 5.

First, during a 1x EV-DO data call connection at the cell boundary between the 1x EV-DO network 200 and the 1x network 300, the data reception error rate increases above the reference value, or the transmission rate falls below the reference value, On the other hand, if the pilot strength of the 1x network is received above the reference value, the terminal 100 recognizes that the 1x signal is good, and then transmits the start message (ORM) to the base station 301 of the 1x network 300 A handoff is attempted from the 1x EV-DO network 200 to the 1x network 300 (S401). At this time, the terminal 100 sets the fourth bit (IS-54 Power Class) of the SCM of the initiation message (ORM) to '1' to inform that the terminal is a 1x and 1x EV-DO dual terminal, and at the same time, the DRS Also set to '1' and transmit.

Then, the base station 301 of the 1x network 300 sets the data preparation indicator (DRI) to '1' and transmits a message (A9-Setup-A8) for setting up the A9 and A8 interfaces to the PCF 302. In step S402, the PCF 302 sends an A11 Registration Request message to the PDSN 400 to establish an A10 connection with the PDSN 400 (S403).

Meanwhile, the PDSN 400 sends an A11 Registration Update message to the PCF 202 of the 1x EV-DO network 200 to request termination of the A10 connection, and then, from the PCF 202. In response to the response message (A11-Registration Acknowledge), the A10 connection is terminated (S404).

Then, the PCF 302 of the 1x network 300 transmits an A11 Registration Request message (Lifetime = 0) to the PDSN 400, and then responds to it from the PDSN 400. (A11-Registration Reply) (Lifetime = 0, accept) is returned and the A10 connection with the PDSN 400 is completely released (S405).

On the other hand, in the following description with reference to Figure 6 for the process of the 1x and 1x EV-DO dual terminal 100 in the handoff method of the 1x and 1x EV-DO dual terminal according to this embodiment of the present invention. Let's do it.

First, the 1x and 1x EV-DO dual terminal 100 is connected to the 1x EV-DO data call at the cell boundary between the 1x EV-DO network 200 and the 1x network 300, and the data reception error rate is higher than the reference value. It increases or the transmission rate falls below the reference value, on the other hand, it is checked whether the pilot strength of the 1x network is received above the reference value (S501).

At this time, during the 1x EV-DO data call connection at the cell boundary between the 1x EV-DO network 200 and the 1x network 300 in step 501, the data reception error rate increases or exceeds the reference value. If the speed falls below the reference value, while the pilot strength of the 1x network is received above the reference value (YES), the terminal 100 recognizes that the 1x signal is good and then the base station of the 1x network 300 ( Attempting to transmit by transmitting an initiation message (ORM) to the 301, a handoff is attempted from the 1x EV-DO network 200 to the 1x network 300 (S502). Herein, the terminal 100 sets the fourth bit (IS-54 Power Class) of the SCM of the initiation message (ORM) to '1' to inform that the terminal is a 1x and 1x EV-DO dual terminal. Also set to '1' and transmit.

After that, when the handoff from the 1x EV-DO network 200 to the 1x network 300 is completed, the terminal 100 performs a data call connection with the 1x network 300 (S503). Accordingly, data is transmitted toward the PDSN 400 → 1x PCF 302 → 1x base station 301 → terminal 100.

On the other hand, during the 1x EV-DO data call connection at the cell boundary between the 1x EV-DO network 200 and the 1x network 300 in step 501, the data reception error rate is increased to a reference value or more, or If the transmission rate does not fall below the reference value (NO), the terminal 100 continues to maintain a data call connection with the 1x EV-DO network 200 (S504).

On the other hand, in the following description with reference to Figure 7 for the process of the 1x network 200 in the handoff method of the 1x and 1x EV-DO combined terminal according to this embodiment of the present invention.

First, during a 1x EV-DO data call connection at the cell boundary between the 1x EV-DO network 200 and the 1x network 300, the data reception error rate increases above the reference value, or the transmission rate falls below the reference value, On the other hand, as the pilot strength of the 1x network is received above the reference value, when receiving the initiation message (ORM) from the terminal 100, the base station 301 of the 1x network 300 provides a data preparation indicator (DRI) Set to '1' to transmit a message (A9-Setup-A8) for the A9 and A8 interface setup to the PCF 302 of the 1x network 300 (S601).

Then, the PCF 302 receives the message for setting up the A9 and A8 interfaces (A9-Setup-A8) from the base station 301, and then sends an A11 Registration Request message (A11-Registration Request) to the PDSN 400. In step S602, the A10 connection with the PDSN 400 is established.

Then, when the A10 connection with the PCSN 202 of the PDSN 400 and the 1x EV-DO network 200 is terminated, the PCF 302 of the 1x network 300 sends an A11 Registration Request message (A11-Registration Request). (Lifetime = 0) is transmitted to the PDSN 400, and then A11-Registration Reply (Lifetime = 0, accept) is returned from the PDSN 400 to completely release the A10 connection ( S603).

Although the present invention has been described in more detail with reference to several embodiments, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention.

As described above, according to the handoff method of the 1x and 1x EV-DO combined terminal according to the present invention, the 1x EV-DO signal is weak during use of the 1x EV-DO data call or the data is stopped and the terminal is placed in a doped state. In the case of a transition, by automatically proceeding the handoff to the 1x network having normal strength, the call connection time can be shortened by 7 seconds or more compared to the case of resetting the call in the 1x network, which results in a data call instantaneous disconnection time. Or, it has an excellent effect of improving data call quality by minimizing downtime.

Claims (24)

1x EV-DO network with PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal, During 1x EV-DO data call connection, 1x EV-DO signal is weak and data reception error rate is increased, or data transmission is interrupted due to timeout, so the 1x and 1x EV-DO dual terminal and PDSN transition to doping state. Step 101, when the terminal recognizes that the 1x signal is good, transmits an initiation message (ORM) to the base station of the 1x network and attempts a handoff from the 1x EV-DO network to the 1x network; Step 102, the base station of the 1x network transmits a message (A9-Setup-A8) for setting up A9 and A8 interfaces to the PCF of the 1x network; Step 103, wherein the PCF of the 1x network transmits an A11 Registration Request message to the PDSN to establish an A10 connection with the PDSN; Step 104, the PDSN terminating the A10 connection through communication with the PCF of the 1x EV-DO network; And Step 105, wherein the PCF of the 1x network completely releases the A10 connection with the PDSN through communication with the PDSN to complete a handoff from the 1x EV-DO network of the terminal to the 1x network. 1x and 1x EV-DO combined terminal handoff method. The method of claim 1, In step 101, the terminal indicates that it is a 1x and 1x EV-DO combined terminal requesting a dormant handoff from the 1x EV-DO network to the 1x network. The 1st bit (IS-54 Power Class) is set to '1' and the DRS is also set to '1'. The method of claim 1, In step 102, the base station of the 1x network transmits a message for setting up the A9 and A8 interfaces (A9-Setup-A8) to the PCF of the 1x network. The data preparation indicator (DRI) is set to '1'. Handoff method of 1x and 1x EV-DO combined terminal characterized in that the transmission possible. The method of claim 1, In step 104, the PDSN terminates the A10 connection with the PCF of the 1x EV-DO network. The PDSN transmits an A11 Registration Update message to the PCF of the 1x EV-DO network. Requesting termination of the A10 connection, and receiving a response message (A11-Registration Acknowledge) from the PCF of the 1x EV-DO network to terminate the handoff of the 1x and 1x EV-DO dual terminal. The method of claim 1, In step 105, the PCF of the 1x network completely releases the A10 connection with the PDSN, wherein the PCF of the 1x network sends an A11-Registration Request (Lifetime = 0) to the PDSN. And transmitting and releasing a response message (A11-Registration Reply) (Lifetime = 0, accept) from the PDSN after the transmission, thereby releasing the 1x and 1x EV-DO combined terminal. 1x EV-DO network with PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal, The 1x and 1x EV-DO combined terminals have a weak 1x EV-DO signal during a 1x EV-DO data call connection to increase the data reception error rate or stop data transmission due to timeout. A step 201 of checking whether or not the state has been changed; When the current state of the terminal transitions to the doping state in step 201, the terminal recognizes that the 1x signal is good and then attempts to transmit by transmitting an initiation message (ORM) to the base station of the 1x network. Step 202, attempting a handoff from the DO network to the 1x network; And When the terminal completes the handoff from the 1x EV-DO network to the 1x network, step 203 of performing a data call connection with the 1x network is performed. Way. The method of claim 6, If the current state does not transition to the doping state in step 201, steps 204 and 1x EV further comprising the step 204 of continuously maintaining a data call connection with the 1x EV-DO network. -Handoff method of DO terminal. The method of claim 6, In step 202, the terminal indicates that it is a 1x and 1x EV-DO combined terminal requesting a dormant handoff from the 1x EV-DO network to the 1x network. The 1st bit (IS-54 Power Class) is set to '1' and the DRS is also set to '1'. 1x EV-DO network with PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal, During 1x EV-DO data call connection, 1x EV-DO signal is weak and data reception error rate is increased, or data transmission is interrupted due to timeout, so the 1x and 1x EV-DO dual terminal and PDSN transition to doping state. In step 301, upon receiving the start message (ORM) from the terminal, the base station of the 1x network transmits a message for setting up the A9 and A8 interfaces (A9-Setup-A8) to the PCF of the 1x network; Step 302, wherein the PCF of the 1x network transmits an A11-Registration Request to the PDSN to establish an A10 connection with the PDSN; And When the A10 connection with the PDSN and the PCF of the 1x EV-DO network is terminated, the PCF of the 1x network completely releases the A10 connection with the PDSN through communication with the PDSN, and thus, in the 1x EV-DO network of the terminal. A handoff method of a 1x and 1x EV-DO dual terminal comprising the step 303 of completing a handoff to a 1x network. The method of claim 9, In step 301, the terminal indicates that it is a 1x and 1x EV-DO combined terminal requesting dormant handoff from the 1x EV-DO network to the 1x network. The 1st bit (IS-54 Power Class) is set to '1' and the DRS is also set to '1'. The method of claim 9, In step 301, the base station of the 1x network transmits a message for setting up the A9 and A8 interfaces (A9-Setup-A8) to the PCF of the 1x network. The data preparation indicator (DRI) is set to '1'. Handoff method of 1x and 1x EV-DO combined terminal characterized in that the transmission possible. The method of claim 9, In step 303, the PCF of the 1x network completely releases A10 connection with the PDSN. The PCF of the 1x network sends an A11 Registration Request message (Lifetime = 0) to the PDSN. And releases a response message (A11-Registration Reply) (Lifetime = 0, accept) from the PDSN and releases the reply. 1x EV-DO network with PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal, During a 1x EV-DO data call connection at cell boundaries of 1x EV-DO network and 1x network, the data reception error rate increases above the reference value, or the transmission rate falls below the reference value, while the pilot strength of the 1x network If received above the reference value, the terminal recognizes that the 1x signal is good, and then sends a start message (ORM) to the base station of the 1x network to attempt a handoff from the 1x EV-DO network to the 1x network 401 step; Step 402, the base station of the 1x network transmits a message (A9-Setup-A8) for setup of A9 and A8 interfaces to the PCF of the 1x network; Step 403, the PCF of the 1x network transmits an A11 Registration Request message to the PDSN to establish an A10 connection with the PDSN; Step 404, the PDSN terminating the A10 connection through communication with the PCF of the 1x EV-DO network; And Step 405, wherein the PCF of the 1x network completely releases the A10 connection with the PDSN through communication with the PDSN to complete a handoff from the 1x EV-DO network of the terminal to the 1x network. 1x and 1x EV-DO combined terminal handoff method. The method of claim 13, In step 401, the terminal informs itself that the SCM of the initiation message (ORM) is the 1x and 1x EV-DO combined terminal requesting the dormant handoff from the 1x EV-DO network to the 1x network. The 1st bit (IS-54 Power Class) is set to '1' and the DRS is also set to '1'. The method of claim 13, In step 402, the base station of the 1x network transmits a message for setting up the A9 and A8 interfaces (A9-Setup-A8) to the PCF of the 1x network. The data preparation indicator (DRI) is set to '1'. Handoff method of 1x and 1x EV-DO combined terminal characterized in that the transmission possible. The method of claim 13, In step 404, the PDSN terminates the A10 connection with the PCF of the 1x EV-DO network. The PDSN transmits an A11 Registration Update message to the PCF of the 1x EV-DO network. Requesting termination of the A10 connection, and receiving a response message (A11-Registration Acknowledge) from the PCF of the 1x EV-DO network to terminate the handoff of the 1x and 1x EV-DO dual terminal. The method of claim 13, In step 405, the PCF of the 1x network completely releases the A10 connection with the PDSN, wherein the PCF of the 1x network sends an A11-Registration Request (Lifetime = 0) to the PDSN. And transmitting and releasing a response message (A11-Registration Reply) (Lifetime = 0, accept) from the PDSN after the transmission, thereby releasing the 1x and 1x EV-DO combined terminal. 1x EV-DO network with PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal, During the 1x EV-DO data call connection between the 1x and 1x EV-DO combined terminal at the cell boundary between the 1x EV-DO network and the 1x network, the data reception error rate is increased above the reference value or the transmission rate is lower than the reference value. Dropping, while checking whether the pilot strength of the 1x network has been received above the reference value; If the data reception error rate of the 1x EV-DO network increases above the reference value or the transmission rate falls below the reference value, while the pilot strength of the 1x network is received above the reference value, the terminal has a good 1x signal. Step 502, attempting a handoff from the 1x EV-DO network to the 1x network by transmitting an initiation message (ORM) to the base station of the 1x network after recognizing the message; And When the terminal completes the handoff from the 1x EV-DO network to the 1x network, step 503 of performing a data call connection with the 1x network is performed. Way. The method of claim 18, If the data reception error rate of the 1x EV-DO network increases above the reference value or the transmission rate does not fall below the reference value in step 501, the terminal continues to maintain a data call connection with the 1x EV-DO network. Step 504 further comprises a 1x and 1x EV-DO combined handoff method characterized in that it further comprises. The method of claim 18, In step 502, the terminal indicates that it is a 1x and 1x EV-DO combined terminal requesting a dormant handoff from the 1x EV-DO network to the 1x network. A method of handoff of a 1x and 1x EV-DO terminal, characterized in that the fourth bit (IS-54 Power Class) is set to '1' and the DRS is also set to '1'. 1x EV-DO network with PCF and AN; 1x network with PCF and base station; A handoff method of a 1x and 1x EV-DO dual terminal in a mobile communication network composed of a PDSN and a 1x and 1x EV-DO dual terminal, During a 1x EV-DO data call connection at cell boundaries of 1x EV-DO network and 1x network, the data reception error rate increases above the reference value, or the transmission rate falls below the reference value, while the pilot strength of the 1x network As received above the reference value, when receiving the start message (ORM) from the terminal, the base station of the 1x network transmits a message (A9-Setup-A8) for the A9 and A8 interface setup to the PCF of the 1x network Step 601; Step 602, wherein the PCF of the 1x network sends an A11 registration request message to the PDSN to establish an A10 connection with the PDSN; And When the A10 connection with the PDSN and the PCF of the 1x EV-DO network is terminated, the PCF of the 1x network completely releases the A10 connection with the PDSN through communication with the PDSN, and thus, in the 1x EV-DO network of the terminal. A handoff method of a 1x and 1x EV-DO dual terminal comprising the step 603 of completing a handoff to a 1x network. The method of claim 21, In step 601, the terminal indicates that it is a 1x and 1x EV-DO combined terminal requesting a dormant handoff from the 1x EV-DO network to the 1x network. The 1st bit (IS-54 Power Class) is set to '1' and the DRS is also set to '1'. The method of claim 21, In step 601, the base station of the 1x network transmits a message for setting up the A9 and A8 interfaces (A9-Setup-A8) to the PCF of the 1x network. The data preparation indicator (DRI) is set to '1'. Handoff method of 1x and 1x EV-DO combined terminal characterized in that the transmission possible. The method of claim 21, In step 603, the PCF of the 1x network completely releases the A10 connection with the PDSN, and the PCF of the 1x network transmits an A11 Registration Request message (Lifetime = 0) to the PDSN. And releases a response message (A11-Registration Reply) (Lifetime = 0, accept) from the PDSN and releases the reply.

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