KR100279722B1 - Packet call generator for testing functions of mobile data service device and method thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless data service device (IWF system) for providing wireless data services to mobile subscribers, and more particularly, to test data traffic processing functions and packet call processing functions of the Internet in wireless data service devices. Packet call generator and functional test method for functional test of

In this method, the packet call generator tests the data traffic processing function and the call processing function of a wireless data service device connecting a wireless network providing a wireless communication service to a wireless subscriber and the Internet. The relay line matching unit of the packet call generator is matched with the wireless data service device, and performs switching to a call between the packet call generator and the wireless data service device. The packet data processing unit is connected to the wireless data service apparatus through the relay line matching unit and emulates the function of the mobile subscriber. The relay line matching unit and the packet data processing unit are connected to each other through the control bus and the data bus. The control unit controls the operation of the packet data processing unit, and provides the wireless data service apparatus with functional tests such as outgoing call connection, data transmission and reception, and call cancellation.

Description

PACKET CALL GENERATOR FOR TESTING FUNCTIONS OF MOBILE DATA SERVICE DEVICE AND METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interworking function system (IWF system) for providing a wireless data service to a mobile subscriber. In particular, the present invention relates to data traffic processing of the Internet in an IWF system. The present invention relates to a packet call generator and a function test method for a functional test of a wireless data service device for testing a function and a packet call processing function.

The cellular mobile communication system divides the entire service area into a plurality of base station areas to form cells, which are small service areas, and centrally controls these base stations with a mobile switching center (MSC). This allows the subscriber to continue the call while moving from cell to cell. As technology has advanced and subscriber needs have diversified, cellular mobile communication systems have provided a variety of data services to mobile subscribers as well as call services.

FIG. 1 illustrates a network configuration for providing a wireless data service to a mobile subscriber in a system using code division multiple access (CDMA) technology. As shown, a terminal (Terminal Equipment 2: TE2) 110 such as a personal computer (PC) or a notebook (Note-book), and a mobile phone connected to the terminal 110 (Mobile Termination 2: MT2) 120, a base station (BS) 130 connected to the mobile phone 120 via wireless, a mobile switching center (MSC) 140 connected with the base station, a mobile switching station 140 and Consists of an interworking function system (IWF system) 150 and a host computer 170 connected to the internet 160 and an internet 160 connected to the wireless data service device 150. do.

As described above, the wireless data service apparatus 150 connects a wireless network composed of a base station 130 and a mobile switching center 140 to the Internet 160 or a public switched telephone network (PSTN). Provides wireless subscribers with wireless data services such as internet and fax. To this end, the wireless data service apparatus 150 may process a plurality of circuit calls for a PSTN (telephone, fax) and a plurality of packet calls for the Internet, respectively.

The procedure of accessing the Internet through the wireless data service device 150 by the mobile subscribers 110 and 120 will be described below.

When the mobile subscriber requests calling from the base station 130 through the air interface using the terminal 110 and the mobile phone 120, the base station 130 sends the mobile switching center 140 to the mobile switching center 140 through the A-interface. Require call setup. The mobile switching center analyzes the service option included in the outgoing request message, and requests the call setup from the wireless data service device 150 when the service option requires packet data service.

The wireless data service device 150 connects a call path for transmitting and receiving data with the mobile subscribers 110 and 120, and then points to a point-to-point protocol (PPP) with the mobile subscribers 110 and 120. ) Perform the connection procedure.

When the PPP connection is established between the wireless data service device 150 and the mobile subscribers 110 and 120, the wireless data service device 150 is connected to the mobile subscribers 110 and 120 and the host 170 of the Internet 160. It performs data relay function by Internet Protocol (IP) Routing.

The wireless data service device operating as described above operates only when connected to a wireless network (base station, mobile switching center) and a wired network (PSTN, Internet). If the producer wanted to develop a wireless data service device and test its operation, the producer had to connect the wireless data service device directly to the wireless network and use the wireless data service device to connect the call with the mobile subscriber. In addition, since mobile subscribers must be connected to a host of the Internet, testing of wireless data service devices requires a connection between the wireless network and the Internet.

In addition, the wireless data service apparatus must be configured to handle a plurality of circuit calls and a plurality of packet calls, and in order to confirm whether the wireless data service apparatus can process the plurality of calls normally, each call is required. Many mobile subscribers (terminals, mobile phones) are needed. However, in the production process, it is impossible to actually connect many mobile subscribers to the wireless data service device, which requires a lot of manpower and equipment. Therefore, when the data traffic processing function and the call processing function of the wireless data service apparatus are tested according to the prior art, there is a problem that a very large cost and manpower are required.

Therefore, an object of the present invention, which was devised to solve the problems of the prior art operating as described above, can test the data traffic processing function and call processing function of a wireless data service apparatus without being connected to a wireless network or the Internet. An object of the present invention is to provide a packet call generator and a functional test method for functional test of a wireless data service device.

Another object of the present invention is to provide a packet call generator and a function test method for functional test of a wireless data service device, which can simulate an environment necessary for testing a data traffic processing function and a call processing function of a wireless data service device. It is done.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention and the accompanying drawings.

1 is a network diagram for providing a wireless data service to a mobile subscriber in a system using a code division multiple access technique.

2 is an embodiment of a packet call generator configuration according to the present invention;

3 is a message flow diagram illustrating a mobile subscriber originating connection test procedure of a packet call generator according to the present invention.

4 is a message flow diagram illustrating a data transmission test procedure of a packet call generator according to the present invention.

5 is a message flow diagram illustrating a call release test process by a terminal request of a packet call generator according to the present invention.

6 is a message flow diagram illustrating a call release test procedure by a PPP termination request of a packet call generator according to the present invention.

<Explanation of symbols for main parts of the drawings>

110: terminal 120: mobile phone

130: base station 140: mobile switching center

150: wireless data service device 160: the Internet

170: host computer 200: packet call generator

210: relay line matching unit 220: packet data processing unit

230: Ping processing unit 240: IP processing unit

250: Multiple PPP client unit 260: VME bus

270: TDM bus 280: control unit

152: network matching unit 154: main control unit

156: data processing unit

An embodiment of a packet call generator for a functional test of a wireless data service apparatus according to the present invention, which was created to achieve the object as described above,

A relay line matching unit that is matched with a wireless data service device (IWF system) having a function of connecting a mobile communication network and the Internet, and performs switching to a call between a packet call generator and a wireless data service device;

A packet data processing unit connected to a wireless data service device through the relay line matching unit and emulating a function of a mobile subscriber;

A control bus transferring a control signal between the relay line matching unit and the packet data processing unit;

A data bus transferring data between the relay line matching unit and the packet data processing unit; And

And a controller configured to control an operation of the packet data processor to perform a test for a functional test of a wireless data service device.

An embodiment of a functional test method of a wireless data service device according to the present invention,

Requesting, by the packet call generator, the call connection by the origination of the mobile subscriber from the wireless data service apparatus;

Setting up a Point-to-Point Protocol (PPP) resource internally by a wireless data service apparatus requesting a call connection and responding to a packet call generator;

The packet call generator receiving the response connects the call path, and then reports the call connection result to the tester;

Connecting, by a multiple PPP client unit of a packet call generator, a PPP connection with a wireless data service device through the connected call path; And

And a packet call generator reporting the PPP connection result to a tester.

Another embodiment of the functional test method of the wireless data service device according to the present invention,

The packet call generator connecting the PPP connection with the wireless data service apparatus;

Pinging, by a ping processing unit of a packet call generator, a ping test through the PPP access path; And

A ping processing unit reporting the ping test result to a tester.

Another embodiment of the functional test method of the wireless data service device according to the present invention,

Connecting, by the packet call generator, the PPP connection according to the call request from the wireless data service device and the mobile subscriber;

Requesting, by the packet call generator, the wireless data service device to release the call;

The wireless data service device requesting the release of the call, internally releasing the PPP connection and responding to the packet call generator; And

The packet call generator receiving the response releases the call path for the PPP connection, and reports to the tester that the release is completed.

Another embodiment of the functional test method of the wireless data service device according to the present invention,

Connecting, by the packet call generator, the PPP connection according to the call request from the wireless data service device and the mobile subscriber;

Requesting, by the multiple PPP client unit of the packet call generator, a PPP server termination of the PPP server of the wireless data service apparatus;

Responding to the packet call generator by the PPP server that is requested to terminate the PPP connection;

The PPP server internally releasing the PPP connection and requesting a call release from the packet call generator; And

And a packet call generator requesting the release of the call releases the call path for the PPP connection, and reports to the tester that the release is completed.

Another embodiment of the functional test method of the wireless data service device according to the present invention,

If the tester requests a functional test of the wireless data service device, the packet call generator connects the PPP connection with the wireless data service device and reports it to the tester;

The packet call generator performing a ping test over the PPP connection and reporting the result to a tester; And

When the ping test is completed, the packet call generator and the wireless data service device releases the PPP connection and reports the result to the tester.

The present invention is connected to the wireless data service device of the production stage, and generates a packet call generator that can generate a plurality of packet calls and data traffic to provide to the wireless data service device, using the configured packet call generator wireless data service Proceeding with a call, a method for testing the function of a wireless data service device is provided.

By using the packet call generator as described above, there is no need for other network elements (base station, mobile switching center) constituting a mobile communication network by a digital cellular service (DCS) or a personal communication service (PCS). The function of the wireless data service device can be verified.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention.

2 is a block diagram of a packet call generator according to an embodiment of the present invention. As shown in FIG. 2, a packet call generator is matched through a wireless data service apparatus 150 and a relay line 2. A trunk interface matching unit (TRIA) 210 which performs switching and communication by a call, and a packet data processing unit which is connected to a wireless data service device through the relay line matching unit 210 and emulates the role of a mobile subscriber. Packet Data Processing board Assembly (PDPA) 220, Versa Module Eurocard (VME) bus 260 for transmitting a control signal between the relay line matching unit 210 and the packet data processing unit 220, the relay line matching unit 210 Is connected to the packet data processing unit 220 through a time division multiplexing (TDM) bus (270) for transmitting data between the packet data processing unit 220 and a serial line by RS232-C, Copper of call generator It is composed of a control unit 280 for controlling the operation.

The relay line matching unit 210 is connected to the network matching unit 152 of the wireless data service device 150 through the E1 relay line 2. The relay line matching unit 210 is composed of a plurality of switches and connects a path between the packet call generator 200 and the wireless data service device 150.

The packet call generator 200 according to the present invention mounts a plurality of packet data processing units 220, preferably up to 8 packet data processing units 220. The packet data processing unit 220 includes a plurality of multi PPP clients 250 emulating the role of a mobile subscriber, an IP processor 240 emulating an internet protocol of the multi PPP clients, and the multi PPP clients. It consists of a ping processing unit 220 to perform a ping test (ping test) through the unit 250.

The multiple PPP client processing unit 250 and the ping processing unit 240 emulate the operations of 16 mobile subscribers, and the IP processing unit 230 is also configured to emulate the IP processing of 16 mobile subscribers simultaneously. Therefore, the packet call generator according to the present invention can emulate the operation by up to 120 mobile subscribers. This function is very important for testing the load and capacity of the wireless data service device.

The packet data processing unit 220 and the relay line matching unit 210 transmit and receive a control message through the VME bus 260, and also transmit and receive data through the TDM bus 270. The mobile subscriber 250 of the packet data processing unit 220 may transmit data traffic to the relay line matching unit 210 through the TDM bus 270, and the relay line matching unit 210 may transmit the data traffic to the wireless data service device ( 150).

The controller 280 transmits the tester's command to the packet data processing unit 220 and reports the test result to the tester through the screen. That is, the controller 280 performs a function of controlling call generation / stopping, call generation amount control, and data traffic control through the packet data processing unit 220 by a tester's command.

The packet call generator 200 configured as described above interworks with the wireless data service apparatus 150 to generate a packet call and data traffic and release the call. The present invention can test all the functions that can be provided in the wireless data service device, but in the present specification, a mobile subscriber call connection process, a data transmission process and a call release process will be described as an example. However, it is apparent that the present invention is not limited to the above processes. The controller 280 stores various call generation scenarios, and can automatically test various functions according to the stored scenarios without a tester's command.

The controller 280 performs an automatic call generation function and a call generation result statistics function according to a call generation scenario previously input. The call origination scenario specifies the number of calls to be generated, the destination IP address, the length of the Internet Control Message Protocol (ICMP) message according to the specification, the number of ping attempts, and the transmission period of the ICMP message. . Therefore, the controller 280 may generate various function tests by adjusting the amount of traffic as desired.

Hereinafter, the operation principle of a preferred embodiment of a functional test method of a wireless data service apparatus according to the present invention will be described in detail with reference to FIG. 2 and the accompanying drawings.

Referring to Figure 3 describes the radio subscriber call connection test process of the packet call generator according to the present invention.

In step S102, the controller 280 transmits a call connection request command by the mobile subscriber to the packet data processing unit 220 through the serial line 1. The call connection request command includes information such as a service option for requesting wireless data service and a telephone number of the calling mobile phone as a parameter. The packet data processing unit 220 receives the call connection request command and, in step S104, sends a CGOutCallReq message to the relay line matching unit 210.

In step s106, the relay line matching unit 210 sends an IAM (Initial Address Message) for making an outgoing call connection by the wireless subscriber to the network matching unit 152 of the wireless data service apparatus 150. IAM is an outgoing request message by Signaling System No. 7 (SS7), and includes an originating / receiving number and a relay line channel number for routing a call. The IAM sent by the relay line matching unit to the network matching unit 152 in step s106 includes information indicating that the calling type is caused by the mobile subscriber, and thus, is displayed as IAM_M. In step s108, the network matching unit 152 sends an address complete message (ACM) that is an acknowledgment for the IAM to the relay line matching unit 210.

In steps S110, S112, S114, and S116, the wireless data service apparatus 150 processes an outgoing signal by the mobile subscriber and connects a path for the outgoing signal. Since the call processing process inside the wireless data service apparatus 150 is outside the gist of the present invention, a detailed description thereof will be omitted. When the outgoing path connection is completed in steps s110 to s116, in step s118, the network matching unit 152 sends an ANM (Answer Message) which is a response to the path connection of the originating signal to the relay line matching unit 210.

The relay line matching unit 210 receiving the ANM connects a time switch to allocate a channel for the time division multiplexing bus 270, and sends a CGOutCallAns message to the packet data processing unit 220 in step S120. The CGOutCallAns includes information on the time division multiplexing channel allocated by the relay line matching unit 210. Then, in step s122, the packet data processing unit 220 informs the control unit 280 that the outgoing signal is connected with the mobile subscriber's telephone number, and connects the time switch to the time division multiplexing channel designated by CGOutCallAns, thereby relaying line matching unit 210. ) And the call path of the TDM bus.

Then, in step s124, the multiple PPP client unit 250 of the packet data processing unit 220 is connected to the PPP server and the LCP (Line Control) of the data processing unit 156 of the wireless data service apparatus 150 through the connected call path. Protocol (NCP) / Network Control Protocol (NCP) connection.

When the PPP connection is completed, in step S128, the packet data processing unit 220 reports the PPP connection result to the controller 280 together with the mobile subscriber's telephone number. The control unit 280 receives the report and outputs the mobile subscriber call connection result to the screen together with the mobile subscriber's telephone number to inform the tester.

As described above, after the wireless data service apparatus 150 establishes a path with a mobile subscriber (actually, a multi-PPP client portion of a packet call generator) that has requested an originating call, the wireless data service apparatus 150 is a multi-PPP client. The data of the unit 250 is transmitted to the host computer 170 through the Internet 160, and the data of the Internet 160 is transmitted to the multi-PPP client unit 250.

The packet call generator 200 performs a ping test to confirm whether the wireless data service device normally performs a data transmission process.

Referring to Figure 4 describes the data transmission test process of the packet call generator according to the present invention.

When the PPP connection is completed, the packet call generator 200 performs a ping test, as predetermined by the call generation scenario.

In step s210, the ping processing unit 230 of the packet data processing unit 220 generates a ping task and generates an ICMP echo request message (Destination IP Address) according to a call origination scenario. Send ICMP Echo Request). The wireless data service apparatus 150 transmits the ICMP echo request message to the Internet, and in step S220, the ICMP echo response message is transmitted to the ping processor 230 of the packet data processor 220 by an ping test. To pass.

When the ping processor 230 receives the ICMP echo response message, the ping processor 230 calculates a delay time between transmitting the ICMP echo request message and receiving the ICMP echo response message.

In steps s230 and s240, the ping processor 230 repeatedly transmits an ICMP echo request message for a predetermined number of ping tests according to a call generation scenario, and calculates a delay time each time an ICMP echo response message is received. do. When the ping test specified by the call generation scenario is completed, the ping processor 230 transmits the packet loss rate and the average delay time due to the ping test to the controller 280 in step S250.

The controller 280 outputs the ping test result to the screen and informs the tester of the data transmission test result. The tester can determine the state of the wireless data service device through the data transmission test result.

When the ping test ends, the packet call generator 200 releases the call as predetermined by the call generation scenario. The call release can be divided into a case in which the mobile subscriber (multiple PPP client unit) requests call release and a case in which the mobile subscriber (multiple PPP client unit) requests PPP termination.

First, when the mobile subscriber requests the release according to the call generation scenario, a procedure for testing the release operation will be described with reference to FIG. 5.

When the release type inputted at the call connection request command (s102) by the call generation scenario is 'release request of the mobile subscriber', in step s310, the packet data processing unit 220 releases the call to the relay line matching unit 210. Send a CGCallRelReq message requesting The CGCallRelReq message includes the mobile subscriber's telephone number of the channel to release.

In step s320, the relay line matching unit 210 sends a REL requesting the call release to the network matching unit 152 of the wireless data service device 150. Receiving the REL, the network matching unit 152 terminates the PPP connection in the wireless data service apparatus 150 in steps s330 and s340, and then the relay line matching unit 210 in step s350. Send an RLC to indicate the completion of the deinterleaving.

The relay line matching unit 210 having received the RLC from the network matching unit 152 sends a CGCallRelAns to the packet data processing unit 220 in step S360, indicating that the call of the mobile subscriber is released, and connecting the time switch for the mobile subscriber path. Release it. The packet data processor 220 receiving the CGCallRelAns reports to the controller 280 that the call of the mobile subscriber has been released in step S370. The controller 280 outputs the call cancellation result of the mobile subscriber together with the mobile subscriber's telephone number on the screen.

Next, when the mobile subscriber requests PPP termination by the call generation scenario, a procedure for testing the call release operation will be described with reference to FIG. 6.

When the release type input at the call connection request command (s102) is 'PPP end' according to the call generation scenario, in step S402, the multiple PPP client unit 250 of the packet data processing unit 220 connects to the pre-connected PPP connection. The PPP terminate request message (PPP Terminate Request) is transmitted to the PPP server of the data processing unit 156 of the wireless data service apparatus 150 through the path.

After receiving the PPP end request message, the PPP server terminates the PPP connection, and then informs the multiple PPP clients 250 of the packet data processing unit 220 that the PPP terminate Ack message is terminated.

In step s406 to step s410, the wireless data service device 150 internally terminates the PPP connection, and then sends a REL to the relay line matching unit 210 in step s412 to request the release. After receiving the REL, the relay line matching unit 210 transmits the CGCallRelReq to the packet data processing unit 220 together with the mobile subscriber's telephone number in step s414 to inform the mobile subscriber of the call cancellation.

Upon receiving the CGCallRelReq, the packet data processing unit 220 transmits the CGCallRelAns to the relay line matching unit 210 in response to the call release in step s416. Receiving the CGCallRelAns relay line matching unit 210 disconnects the time switch in order to release the call path of the mobile subscriber, and in step s418 transmits the RLC to the wireless data service device 150 for the call cancellation request. Answer.

The packet data processing unit 220 disconnects the time switch to release the call path of the mobile subscriber, and reports the mobile subscriber's call with the mobile subscriber's phone number to the controller 280 in step S420. .

The present invention can be variously modified and can take various forms and only the specific embodiments thereof are described in the detailed description of the invention. It is to be understood, however, that the present invention is not limited to the specific forms mentioned in the detailed description of the invention, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood to do.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

The present invention can test its operation without connecting a wireless data service device that provides packet data services to mobile subscribers of a digital cellular service (DCS) system and a personal mobile communication service (PCS) system with an actual wireless network. .

The packet call generator according to the present invention can test the data traffic processing function and the call processing function of the wireless data service device, and can test the capacity of the wireless data service device by simulating packet call processing by a plurality of mobile subscribers. have. Therefore, the packet call generator according to the present invention has the effect of reducing a lot of manpower and cost required for testing the wireless data service device.

Claims (19)

A relay line matching unit, which is matched with a wireless data service apparatus having a function of connecting a mobile communication network and the Internet, and which switches to a call between the packet call generator and the wireless data service apparatus; A packet data processing unit connected to a wireless data service device through the relay line matching unit and emulating a function of a mobile subscriber; A control bus transferring a control signal between the relay line matching unit and the packet data processing unit; A data bus transferring data between the relay line matching unit and the packet data processing unit; And And a controller configured to control an operation of the packet data processing unit to perform a test for a functional test of a wireless data service device. The method of claim 1, wherein the packet data processing unit, One or more multiple PPP client portions emulating the functions of a mobile subscriber and connected to the Point-to-Point Protocol (PPP) over the data bus; And at least one ping processing unit for performing a ping test of a mobile subscriber by the multi-PPP client unit. The method of claim 1, wherein the packet data processing unit, And a switch capable of establishing a communication channel on the data bus. According to claim 1, The relay line matching unit, And a switch capable of establishing a communication channel on the data bus. The packet call generator of claim 1, wherein the controller generates a call to the wireless data service device according to a pre-stored call generation scenario and statistically outputs a result of the call generation. A wireless data service device for connecting a wireless network providing a communication service to a mobile subscriber and the Internet, and a packet call generator emulating the role of the mobile subscriber to test the function of the wireless data service device, Requesting, by the packet call generator, the call connection by the origination of the mobile subscriber from the wireless data service apparatus; Setting up a Point-to-Point Protocol (PPP) resource internally by a wireless data service apparatus requesting a call connection and responding to a packet call generator; The packet call generator receiving the response connects the call path, and then reports the call connection result to the tester; Connecting, by a multiple PPP client unit of a packet call generator, a PPP connection with a wireless data service device through the connected call path; And And a packet call generator reporting the PPP connection result to a tester. 7. The method of claim 6, wherein requesting a call connection comprises transmitting a service option requesting a wireless data service and a telephone number of a mobile subscriber requesting an outgoing call. The method of claim 6, wherein the reporting of the call connection result comprises: a packet call generator outputting a call signal connection result by the mobile subscriber together with a phone number of the mobile subscriber. 7. The method of claim 6, wherein the reporting of the PPP connection result comprises: a packet call generator outputting the PPP connection result along with a telephone number of the mobile subscriber. A wireless data service device for connecting a wireless network providing a communication service to a mobile subscriber and the Internet, and a packet call generator emulating the role of the mobile subscriber to test the function of the wireless data service device, The packet call generator connecting the PPP connection with the wireless data service apparatus; Pinging, by the ping processing unit of the packet call generator, the ping test through the PPP access path; And And a ping processing unit reporting the ping test result to a tester. The method of claim 10, wherein performing the ping test comprises: Sending, by a ping processor, an Internet Control Message Protocol (ICMP) echo request message to a destination Internet Protocol address through the PPP connection; Receiving, by the ping processor, an ICMP echo response message; And And calculating, by the ping processing unit, the ICP echo response message, the delay time for transmitting and receiving the message. The method according to claim 11, wherein the target IP address is predetermined according to a call generation scenario of a packet call generator. The method of claim 10, wherein the performing of the ping test is repeatedly performed a predetermined number of times according to a call generation scenario of a packet call generator. The method of claim 10, wherein reporting the ping test result comprises: A functional test method of a wireless data service device for reporting a packet loss rate and an average delay time by a ping test to a tester. A wireless data service device for connecting a wireless network providing a communication service to a mobile subscriber and the Internet, and a packet call generator emulating the role of the mobile subscriber to test the function of the wireless data service device, Connecting, by the packet call generator, the PPP connection according to the call request from the wireless data service device and the mobile subscriber; Requesting, by the packet call generator, the wireless data service device to release the call; The wireless data service device requesting the release of the call, internally releasing the PPP connection and responding to the packet call generator; And And a packet call generator receiving the response releases the call path for the PPP connection and reports to the tester that the release is completed. A wireless data service device for connecting a wireless network providing a communication service to a mobile subscriber and the Internet, and a packet call generator emulating the role of the mobile subscriber to test the function of the wireless data service device, Connecting, by the packet call generator, the PPP connection according to the call request from the wireless data service device and the mobile subscriber; Requesting, by the multiple PPP client unit of the packet call generator, a PPP connection termination from the PPP server of the wireless data service apparatus; Responding to the packet call generator by the PPP server that is requested to terminate the PPP connection; The PPP server internally releasing the PPP connection and requesting a call release from the packet call generator; And And a packet call generator requesting the release of the call releases the call path for the PPP connection and reports to the tester that the release is completed. A wireless data service device for connecting a wireless network providing a communication service to a mobile subscriber and the Internet, and a packet call generator emulating the role of the mobile subscriber to test the function of the wireless data service device, If the tester requests a functional test of the wireless data service device, the packet call generator connects the PPP connection with the wireless data service device and reports it to the tester; The packet call generator performing a ping test over the PPP connection and reporting the result to a tester; And When the ping test is completed, the packet call generator and the wireless data service device releasing the PPP connection and reporting the result to a tester. 18. The method of claim 17, wherein releasing the PPP connection comprises: And if the release type preset by the tester is a release request of the mobile subscriber, the packet call generator requests release from the wireless data service device. 18. The method of claim 17, wherein releasing the PPP connection comprises: And if the release type preset by the tester is PPP termination, the packet call generator requests PPP termination from the radio data service apparatus.