KR100738924B1 - Method and system for providing changed handoff condition on mobile communication terminal by using reset report - Google Patents

Abstract

A system and a method for providing a changed handoff condition to a mobile terminal by using a reset report are provided to improve QoS(Quality of Service) of a mobile communication service by enabling a mobile terminal to perform handoff with a changed handoff condition. A base station transmitter(110) provides a mobile communication service including voice data to a mobile terminal(100) through an air interface, and transmits a reset report to the mobile terminal(100) to initialize a route update transmission condition of the mobile terminal(100). A base station controller(120) receives voice or data from the base station transmitter(110) and controls it so as to be transmitted to an MSC(Mobile Switching Center)(130) or receives data from the base station transmitter(110) and controls it so as to be transmitted to a PDSN(Packet Data Serving Node)(160) through a GAN(General ATM Network)(150).

Description

System and method for providing a changed handoff condition to a mobile terminal using a reset report {Method and System for Providing Changed Handoff Condition on Mobile Communication Terminal by Using Reset Report}

1 is a simplified diagram of a system for providing a modified handoff condition to a mobile communication terminal using a reset report according to an embodiment of the present invention;

2 is a flowchart illustrating a process of providing a changed handoff condition to a mobile communication terminal during call setup according to a preferred embodiment of the present invention;

3 is a flowchart illustrating a process of providing a changed handoff condition to a mobile communication terminal during handoff according to an exemplary embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: mobile communication terminal 110: base station transmitter

112: 1X transmitter 114: access network transmitter

120: base station controller 122: 1X controller

124: access network controller 130: mobile communication switching center

140: home location register 150: General ATM Network (GAN)

152: Data Location Register 154: Access Network Authentication Server

160: packet data serving node 310: first access network transmitter

312: first access network controller 320: second access network transmitter

322: second access network controller

The present invention relates to a system and method for providing a modified handoff condition to a mobile communication terminal using a reset report. More specifically, after transmitting the RTC-Ack message to the mobile communication terminal in the EV-DO network during call setup between the mobile communication terminal and the EV-DO (Evolution Data Only) network, a Reset Report is generated. After receiving the traffic channel completion (Traffic_Channel_Complete) message from the mobile communication terminal receiving the reset report and transmitting the reset report, the reset report is transmitted to the mobile communication terminal to reflect the handoff condition changed in the call setup phase at the time of handoff of the mobile communication terminal. After the mobile terminal transmits a traffic channel assignment (Traffic_Channel_Assignment) message to the mobile communication terminal from the first access network transmitter of the EV-DO network during handoff, the mobile communication terminal transmits a reset report and receives the reset report from the mobile communication terminal. After receiving the Traffic Channel Complete (Traffic_Channel_Complete) message and sending a reset report to the mobile terminal, A system and method for providing a modified handoff condition to a mobile communication terminal.

The mobile communication system has been developed through the first generation analog AMPS (Advanced Mobile Phone Systems), the second generation cellular (Celluar) / personal communication service (PCS), and the third generation high speed data. International Mobile Telecommunication-2000 (IMT-2000), which is a communication, has been developed and commercialized.

IMT-2000 system for multimedia mobile communication service has defined the standard of synchronous IMT-2000 system in 3GPP (3rd Generation Partnership Project), an international standardization organization, and Qualcomm's HDR (Qualcomm) as a method for high speed packet transmission. The method based on High Data Rate was named "1x EV (Evolution)" and was confirmed as an international standard. Code Division Multiple Access (CDMA) 2000 1x EV-DO (Data Only) is an evolution of CDMA 2000 1x, which only transmits data in CDMA 2000 1x.

Hereinafter, for convenience of description, the CDMA 2000 1x system will be abbreviated as "1X system" and the "CDMA 2000 1x EV-DO system" will be briefly described as "EV-DO system".

The EV-DO system provides a bidirectional high speed packet data service having a transmission rate of up to 2.4 Mbps for packet data only, and is used in combination with a 1X system. That is, the EV-DO system and the 1X system are mixed in hardware in one wireless base station or base station controller, and operations are performed separately.

In other words, the base station transmitter is provided with a channel card for allocating an EV-DO system and a channel card for 1X system, respectively, and the base station controller also processes data for processing packet data transmitted and received by the EV-DO system. There is a data processing board for processing data to and from the board and 1X system.

Meanwhile, the mobile communication terminal uses an EV-DO system to transmit and receive multimedia data. In order to receive a multimedia service from the EV-DO system, the mobile communication terminal attempts to set up a call to the EV-DO system.

However, since the mobile communication terminal is used during the movement, frequent handoffs are performed during call setup, and the reference cell (cell, base station sector) is changed due to the changed handoff condition during call setup. In this case, a call drop occurs because the mobile communication terminal does not perform a handoff.

In addition, when the handoff condition is changed during the handoff of the mobile communication terminal, the handoff of the mobile communication terminal fails.

In order to solve this problem, the present invention provides a reset report after transmitting an RTC-Ack message to a mobile communication terminal in an EV-DO network during call setup between a mobile communication terminal and an EV-DO (Evolution Data Only) network. Transmits a Reset Report, receives a Traffic Channel Complete (Traffic_Channel_Complete) message from the mobile communication terminal receiving the reset report, and sends a reset report to the mobile communication terminal to transmit the handoff condition changed in the call setup step. Reflected during handoff, the mobile communication terminal transmits a traffic channel assignment (Traffic_Channel_Assignment) message to the mobile communication terminal from the first access network transmitter of the EV-DO network during handoff, and transmits a reset report and receives a reset report. After receiving a traffic channel completion (Traffic_Channel_Complete) message from a mobile terminal, the mobile station generates a reset report. By transmitting the present invention is to provide a system and method for providing a handoff condition is changed when a handoff to the mobile terminal for that purpose.

In order to achieve this object, according to a first object of the present invention, in a method for providing a mobile terminal with a changed handoff condition when establishing a call with an EV-DO (Evolution Data Only) system, (a The access network transmitter transmits a connection request (Connection_Request, hereinafter referred to as 'CR') message and route update (hereinafter, referred to as 'RU') message for establishing a call from the mobile communication terminal by a user's key input. Receiving through an access channel; (b) transmitting an ACAck (Access_Channel_Acknowledge) message indicating that the mobile station has received a CR message through a control channel, and sending a traffic channel assignment (TCA) message to the mobile station; Transmitting; (c) receiving a Reverse Traffic Channel (RTC) message, which is a response message to the TCA message, from the mobile terminal and transmitting an RTC-Ack message indicating that the RTC message has been received to the mobile terminal; step; (d) transmitting a reset report to the mobile communication terminal; (e) receiving a traffic channel complete (Traffic_Channel_Complete) message from the mobile communication terminal and transmitting a reset report to the mobile communication terminal; And (f) transmitting a TCC message to the access network controller to complete a call setup between the mobile communication terminal and the EV-DO system. .

According to a second object of the present invention, there is provided a method for providing a mobile terminal with a changed handoff condition upon handoff in an EV-DO (Evolution Data Only) network, the method comprising: (a) a first access network transmitter; And receiving, by the second access network transmitter, a route update (hereinafter referred to as 'RU') message from the mobile communication terminal through a reverse traffic channel (hereinafter referred to as 'RTC'). (b) the first access network transmitter performing a soft handoff by transmitting the RU message received through the RTC to the first access network controller; (c) establishing, by the second access network transmitter, a signaling virtual channel (SVC) connection for transmission and reception of frames; (d) the first access network controller determines the length of the data read controller for the current activation setting and receives from the first access network controller the number of base station transmitters to which the first access network transmitter is currently assigned; Doing; (e) Receive a Packaged Traffic Channel Assignment (Traffic_Channel_Assignment) message from the first access network controller, and the TCA message is referred to as a Forward Traffic Channel (FTC). Transmitting to a mobile communication terminal by using; (f) transmitting a reset report to the mobile communication terminal; (g) receiving a traffic channel completion (Traffic_Channel_Complete, hereinafter 'TCC') message from the mobile communication terminal through the RTC, and transmitting a reset report to the mobile communication terminal using the FTC; And (h) informing the first access network controller that the TCC message has been received and receiving the number of base station transmitters currently assigned from the first access network controller. Provided is a method for providing a mobile communication terminal.

In addition, according to a third object of the present invention, in a system for transmitting a reset report to the mobile communication terminal to provide a changed handoff condition, the mobile communication terminal via the air interface (Air Interface) A base station transmitter for providing a mobile communication service including voice and data and transmitting a reset report to the mobile communication terminal to initialize a route update transmission condition of the mobile communication terminal; And controlling to receive voice or data from a base station transmitter and transmit the same to a mobile communication switching center or to receive data from the base station transmitter and transmit the data to a packet data serving node (PDSN) through a general ATM network (GAN). Provided is a system for providing a changed handoff condition to a mobile communication terminal during handoff, characterized in that it comprises a base station controller.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, if it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, hereinafter, the present invention will be described under the assumption that a code division multiple access (CDMA) 2000 system is used as the mobile communication system. However, the CDMA 2000 system is a system designated for convenience of description and the mobile communication system used in the present invention is not limited thereto.

1 is a diagram schematically illustrating a system for providing a changed handoff condition to a mobile communication terminal by using a reset report according to an exemplary embodiment of the present invention.

A system for providing a changed handoff condition to a mobile communication terminal using a reset report according to a preferred embodiment of the present invention includes a mobile communication terminal 100, a 1X transmitter 112, a 1X controller 142, and a mobile communication switching center (MSC). 1X system including a Mobile Switching Center (130) and a Home Location Register (HLR) 140, a mobile communication terminal 100, an Access Network Transceiver Subsystem (ANTS) 114, An access network controller (ANC) 124, a general ATM switch network (GAN) 150, a data location register (DLR) 152, an access network authentication server EV-DO (Evolution Data Only) system including an Access Network-Authorization Authentication Accounting (AN-AAA) 154 and a Packet Data Serving Node (PDSN) 160 (PDSN). It consists of.

The mobile communication terminal 100 is a terminal that receives a voice service and a low speed data service using a 1X system, and receives a high speed packet data service using an EV-DO system.

The mobile communication terminal 100 transmits a connection request (Connection_Request, hereinafter referred to as CR) message to the EV-DO network to receive a multimedia service from the EV-DO network, and allocates a traffic channel from the EV-DO network (Traffic_Channel_Assignment). When receiving a 'TCA' message, it transmits a Reverse Traffic Channel (RTC ') message to the EV-DO network.

The mobile communication terminal 100 receives a RTC-Ack (RTC_Acknowledgement) message, which is an acknowledgment message for the RTC message, from the EV-DO network and receives a reset report transmitted from the EV-DO network after the RTC-Ack message. Initializes the transmission condition to reflect the handoff condition changed in the connection step with the EV-DO network. Here, the reset report is a message generated by the access network transmitter 114 of the EV-DO network to reset the route update (RU) transmission condition of the mobile communication terminal 100.

In addition, the mobile communication terminal 100 having initialized the transmission condition transmits a traffic channel completion (Traffic_Channel_Complete) message to the EV-DO network, and sends a reset report from the EV-DO network that receives the TCC message. Call setup is completed by receiving and initializing the transmission conditions.

The 1X transmitter 112 and the access network transmitter 114 are base station transceiver subsystems (BTSs) 110, which include voice and data in the mobile communication terminal 100 through an air interface. Provide communication services. In other words, the mobile communication terminal 100 receives a voice or data service using the 1X transmitter 110 and receives a packet data service using the access network transmitter 140.

In particular, when the access network transmitter 114 receives the RTC message from the mobile communication terminal 100, the access network transmitter 114 transmits an RTC-Ack message, which is an acknowledgment message for the RTC message, to the mobile communication terminal 100 and then the mobile communication terminal 100. A reset report for reflecting the handoff condition changed in the call setup step between the EV-DO networks is transmitted to the mobile communication terminal 100, and the reset report is transmitted even after receiving the TCC message from the mobile communication terminal 100. 100 to initialize the transmission condition of the mobile communication terminal 100.

The 1X controller 122 and the access network controller 124 are base station controllers (BSCs) 120 and control the operation of the 1X transmitter 110 and the access network transmitter 140. That is, the 1X controller 122 for controlling the transmission of voice or data receives the voice or data from the 1X transmitter 112 and transmits it to the mobile switching center 130, and the access network controller 124 transmits the access network transmitter 114. Receives the data from the GAN 150 and transmits it to the PDSN (160).

The mobile switching center 130 performs basic and additional service processing for providing a voice communication service, reception and outgoing call processing of a subscriber, location registration procedure and handoff procedure, and interworking with other networks.

The home location register 140 receives location information of the mobile communication terminal 100 and performs functions such as location registration, registration deletion, and location verification of the mobile communication terminal 100. In addition, the home location register 140 stores profile information of the mobile communication terminal 100.

One GAN 150 is provided for each mobile communication switching center 130 and is a communication device connected to the base station controller 120 to perform a routing function of packet data in an EV-DO system. That is, it serves as a switch for performing a soft handoff between the base station controller 120 to the mobile communication terminal 100 to which traffic is connected, and a packet control function (PCF) function for packet data service. Do this. In addition, it performs a function of connecting the data location register 152, access network authentication server 154 and PDSN 160 for packet data service.

The data location register 152 is connected to the access network controller 124 of the EV-DO system and Transmission Control Protocol / Internet Protocol (TCP / IP) to establish location information and paging zone of the mobile communication terminal 100. It is a device that supports the mobility of the mobile communication terminal by managing.

The access network authentication server 154 authenticates the mobile communication terminal 100 using the packet data service by using the EV-DO system to perform a packet data service. Therefore, the access network authentication server 154 is a service status such as MIN (Mobile Identification Number), ESM (Elctronic Serial Number) and service request, termination, origination / suspension of the mobile communication terminal 100 applying for packet data service Save the information.

The PDSN 160 establishes a PPP and TCP / IP protocol between a radio access network (RAN) and a data core network (DCN) including an access network transmitter 114 and an access network controller 124. Provides packet data services.

2 is a flowchart illustrating a process of providing a changed handoff condition to a mobile communication terminal when a call is set up according to a preferred embodiment of the present invention.

In order to receive the packet data service from the EV-DO system, the mobile communication terminal 100 must enter a traffic state. In order to enter the traffic state, the mobile communication terminal 100 needs to establish a connection and session with the access network transmitter 114 so as to transmit and receive data with the access network transmitter 114.

The access network transmitter 114 receives a connection request (Connection_Request, hereinafter referred to as CR) message and a route update (hereinafter referred to as RU) from the mobile communication terminal 100 by a user's key input. A message is received through an access channel (S200).

The access network transmitter 114 receiving the CR message from the mobile communication terminal 100 transmits an ACAck (Access_Channel_Acknowledge) message indicating that the CR message is received from the mobile communication terminal 100 through a control channel, A traffic channel allocation (Traffic_Channel_Assignment, hereinafter called 'TCA') message including a sequence number of a currently located base station and a neighboring base station is transmitted to the mobile communication terminal 100 (S202).

The access network transmitter 114 sends the received CR message and the RU message to the access network controller 124, the access network controller 124 requests the session information from the GAN 150, and the GAN 150 receives the DLR ( Request session information.

The DLR 152 receiving the session information retrieves session information about the mobile communication terminal 100 from the database and transmits the session information search result to the GAN 150, and the GAN 150 receives the received session information search result. Is transmitted to the access network controller 124 to form a session.

The access network transmitter 114 receives a reverse traffic channel (RTC) message, which is a response message to the TCA message, from the mobile communication terminal 100 that receives the TCA message, and receives the RTC message. Notify transmits the RTC-Ack message to the mobile communication terminal 100 (S204).

The access network transmitter 114 sends a reset report to apply the changed RU transmission condition to the mobile terminal 100 when the mobile terminal 100 performs handoff after requesting call setup after transmitting the RTC-Ack message. To transmit to the mobile communication terminal 100 (S206).

The mobile communication terminal 100 receiving the RTC-Ack message and the reset report from the access network transmitter 114 initializes the RU transmission condition, and the access network transmitter 114 and the access network transmitter 114 and the mobile terminal 100 A traffic channel complete message (Traffic_Channel_Complete, hereinafter referred to as 'TCC') indicating that a reverse link is established between the mobile station and the mobile station 100 is received from the mobile communication terminal 100 (S208).

The access network transmitter 114 receiving the TCC message transmits a reset report to the mobile communication terminal 100, and the mobile communication terminal 100 receiving the reset report from the access network transmitter 114 initializes the RU transmission condition. In operation S210, the access network transmitter 114 transmits a TCC message to the access network controller 124 to complete the call setup between the mobile communication terminal 100 and the EV-DO system.

3 is a flowchart illustrating a process of providing a changed handoff condition to a mobile communication terminal during handoff according to an exemplary embodiment of the present invention.

The first access network transmitter 310 and the second access network transmitter 320 receive an RU message from the mobile communication terminal 100 through a reverse traffic channel (hereinafter, referred to as 'RTC') (S300). .

The first access network transmitter 310 transmits the RU message received through the RTC to the first access network controller 312 to prepare for soft handoff (S302).

In the case of soft handoff of the access network controller 124, the first access network controller 312 checks the RU message and assigns a channel element (hereinafter, referred to as "CE") to the second access network controller 322. When the second access network controller 322 requests the second access network transmitter 320 to allocate the CE, the second access network transmitter 320 allocates the CE, and the result is the first access network controller. Send to 312.

In case of soft handoff of the access network transmitter 114, the first access network controller 312 checks the RU message and requests the second access network transmitter 320 to allocate the CE, and the second access network transmitter 320 Assigns the CE and transmits the result to the first access network controller 312.

The second access network transmitter 320 establishes a signaling virtual channel (SVC) connection to transmit and receive a frame (S304).

The first access network controller 312 determines the length of the data read controller for the current activation setting, and transmits the number of base station transmitters currently assigned to the first access network transmitter 310 (S306). ).

The first access network controller 312 packages the traffic channel assignment (Traffic_Channel_Assignment, hereinafter 'TCA') message and sends it to the first access network transmitter 310, and the first access network transmitter 310 sends the TCA message. A forward traffic channel (hereinafter referred to as "FTC") is transmitted to the mobile communication terminal 100 (S308).

After transmitting the TCA message using the FTC, the first access network transmitter 310 transmits a reset report to the mobile communication terminal 100 using the FTC (S310).

At this time, the mobile communication terminal 100 receives the reset report to initialize the RU transmission conditions.

The first access network transmitter 310 or the second access network transmitter 320 that has received a traffic channel completion (Traffic_Channel_Complete, hereinafter referred to as 'TCC') message from the mobile communication terminal 100 having received the reset report. The reset report is transmitted to the mobile communication terminal 100 using the TCA (S312).

At this time, the mobile communication terminal 100 receives the reset report to initialize the RU transmission conditions.

The first access network transmitter 310 or the second access network transmitter 320 notifies the access network controller that the TCC message has been received, and the access network controller reports the number of base station transmitters currently assigned to the first access network transmitter 310. Or, it transmits to the second access network transmitter 320 (S314).

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

As described above, according to the present invention, the mobile communication terminal is changed by reflecting the changed handoff condition by using a reset report when setting up a call between the mobile communication terminal and the EV-DO network or when handing off the mobile communication terminal. By using the off condition to perform a smooth handoff has the effect of improving the quality of the mobile communication service.

Claims (11)

A method for providing a mobile terminal with a changed handoff condition when establishing a call with an EV-DO (Evolution Data Only) system, (a) The access network transmitter sends a connection request (Connection_Request, hereinafter 'CR') message and a route update (hereinafter, RU ') message for establishing a call from the mobile terminal by a user's key input. Receiving through an access channel; (b) transmitting an ACAck (Access_Channel_Acknowledge) message indicating that the mobile station has received the CR message through a control channel, and transmitting a traffic channel assignment (TCA) message; Transmitting to a communication terminal; (c) receiving a Reverse Traffic Channel (RTC) message, which is a response message to the TCA message, from the mobile communication terminal, and receiving an RTC-Ack message indicating that the RTC message has been received. Transmitting to a terminal; (d) transmitting a reset report to the mobile communication terminal; (e) receiving a traffic channel complete (Traffic_Channel_Complete) message from the mobile communication terminal and transmitting a reset report to the mobile communication terminal; And (f) completing the call setup between the mobile communication terminal and the EV-DO system by transmitting the TCC message to an access network controller; And providing a changed handoff condition to the mobile communication terminal. The method of claim 1, After step (a) above, (a1) transmitting the CR message and the RU message received by the access network transmitter to the access network controller; (a2) when the access network controller requests session information from a general ATM network (GAN), the GAN requesting the session information from a data location register (DLR); And (a3) The DLR retrieves the session information for the mobile communication terminal from a database and transmits a session information search result to the GAN, and transmits the session information search result received by the GAN to the access network controller for a session. Forming steps And providing a modified handoff condition to the mobile communication terminal. The method of claim 1, wherein the TCA message, And a sequence number of a base station used by the mobile communication terminal and a neighboring base station. The method of claim 1, wherein the reset report, And a message for initializing a transmission condition for the RU message of the mobile communication terminal. The method of claim 1, wherein the mobile communication terminal, And upon receiving the reset report from the access network transmitter, initializing the RU message transmission condition of the mobile communication terminal. A method for providing a mobile terminal with a changed handoff condition upon handoff in an EV-DO (Evolution Data Only) network, (a) receiving, by a first access network transmitter and a second access network transmitter, an RU message from a mobile communication terminal through a reverse traffic channel (hereinafter referred to as 'RTC'); (b) the first access network transmitter transmitting the RU message received through the RTC to a first access network controller to perform a soft handoff; (c) establishing, by the second access network transmitter, a signaling virtual channel (SVC) connection to transmit and receive a frame; (d) the first access network controller determines the length of a data read controller for a current activation setting, and the first access network transmitter determines the number of base station transmitters to which the first access network transmitter is currently assigned; Receiving from a controller; (e) receiving a packaged Traffic Channel Assignment (Traffic_Channel_Assignment) message from the first access network controller, and calling the TCA message a Forward Traffic Channel (FTC). Transmitting to the mobile communication terminal by using; (f) transmitting a reset report to the mobile communication terminal; (g) receiving a traffic channel completion (Traffic_Channel_Complete) message from the mobile communication terminal through the RTC, and transmitting the reset report to the mobile communication terminal using the FTC; And (h) informing the first access network controller that the TCC message has been received, and receiving a number of base station transmitters currently allocated from the first access network controller. And providing a changed handoff condition to the mobile communication terminal during handoff. The method of claim 6, After step (b), (b1) If the step (b) is the soft handoff of the base station controller, the first access network controller checks the RU message and transmits a channel element to the second access network controller. The second access network controller requests the second access network transmitter to allocate the CE, and the first access network controller assigns the CE to the second access network transmitter. Transmitting to; And (b2) when step (b) is the soft handoff of a base station transmitter, the first access network controller checks the RU message and requests the second access network transmitter to allocate the CE, and the second access The network transmitter assigning the CE and transmitting the allocated result to the first access network controller And providing a changed handoff condition to the mobile communication terminal at the time of handoff. The method of claim 6, wherein the reset report, And providing a changed handoff condition to the mobile communication terminal during handoff, wherein the FTC is transmitted to the mobile communication terminal using the FTC. The method of claim 6, wherein the mobile communication terminal, And receiving the reset report to initialize the RU message transmission condition of the mobile communication terminal. A system for providing a mobile terminal with a changed handoff condition by transmitting a reset report, Conditions for transmitting a route update of the mobile communication terminal by providing a mobile communication service including voice and data to the mobile communication terminal through an air interface, and transmitting the reset report to the mobile communication terminal. A base station transmitter configured to initialize the base station; And Control to receive voice or data from the base station transmitter and transmit it to a mobile communication switching center or to receive data from the base station transmitter and transmit it to a packet data serving node (PDSN) through a general ATM network (GAN). Base station controller System for providing a changed handoff condition to the mobile communication terminal during the handoff, comprising a. The method of claim 10, wherein the base station transmitter, When a reverse traffic channel (RTC) message is received from the mobile communication terminal, the reset report is transmitted after transmitting an RTC-Ack message, which is an acknowledgment message for the RTC message, to the mobile communication terminal. And when the traffic channel complete (Traffic_Channel_Complete) message is received from the mobile communication terminal, transmitting the reset report to the mobile communication terminal.

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