KR20050063622A - Test apparatus for function verification of image communication in ip based radio access network - Google Patents

Abstract

The present invention relates to a simulation test apparatus for verifying video communication functions in an IP (Radio Access Network) -based radio access network (RAN), and to deploying a video function simulation test apparatus at the front / end of a wireless access network. In this case, a simulation for verifying the video communication function that enables the IP-based wireless access network to independently verify the video service function by performing the function and matching test of each subsystem of the IP-based wireless access network and connecting the whole wireless access network to perform video call test. It relates to a test apparatus. In a radio access network, communication between several radio network control stations and node-B and a corresponding radio network control station are enabled. In such an IP-based wireless access network, communication may consist of several hops, several edge routers, and a core router that relays communication between several Node-Bs and a wireless network control station. All components of the radio access network (node-B, radio control station, router) are assigned an IP address and can be addressed by this IP address.

Description

Test apparatus for function verification of image communication in IP based radio access network}

The present invention relates to a simulation test apparatus for verifying a video communication function to perform a video call test in an IP-based wireless access network to independently verify the video service function.

An IP-based wireless access network is a node-B that performs a base station function, a wireless network control station that performs a base station control function, and several node-Bs as well as several wireless network control stations. It consists of a connected edge router and a core router.

In case of video service test in the existing mobile communication system, ATM-based wireless access network is provided between the terminal and the core network, and it is verified whether the video call is normally made when the terminal and the core network are interworked. As described above, in order to verify the function of the wireless access network, all components of the mobile communication system including the video terminal, the wireless access network, and the core network should be in a normal operating state.

Therefore, when a problem occurs in the video terminal and the core network, there is a problem that it is not possible to verify whether the wireless access network is operating normally.

The technical problem to be solved by the present invention is to solve the conventional problems, and in the case of the video service test by placing the video function simulation test apparatus at the front / end of the wireless access network, the function and matching test of each subsystem of the IP-based wireless access network. In addition, the IP-based wireless access network can independently verify the video service function by performing a video call test by connecting the entire wireless access network.

Simulation test apparatus for verifying video communication function according to one feature of the present invention for solving the above problems,

In the IP-based wireless access network, connected to an external Node-B or a wireless network control station to simulate the video communication function to test the video communication function,

A node-B matching unit for matching with the node-B;

A wireless network control station matching unit for matching with the wireless network control station;

An IP matching unit connected to the node-b matching unit and the wireless network control station matching unit through a 100Base-T Ethernet interface;

An image matching unit for compressing and restoring a video and audio signal to provide a video and audio service;

A video phone including a video / audio input / output unit for matching an external video input device (camera) and an image output device (LCD) and an audio input device (microphone) and an audio output device (speaker) to verify voice and video functions;

A controller for transmitting and receiving data with the IP matching unit, transmitting and receiving data with the image matching unit and a DPRAM communication method, and processing video and audio data;

It includes a debugging port connected to the IP matching unit and 100Base-T Ethernet matching and connected to an external debugger personal computer.

Simulation test apparatus for verifying video communication function according to one feature of the present invention for solving the above problems,

A simulation test apparatus for verifying a video communication function in an IP-based wireless access network,

Video function simulation test apparatus means for performing video compression and reconstruction of video and audio signals to provide video and audio services;

A Node-B, which performs a base station function of an IP-based wireless access network, and processes a signal of the imaging function simulation apparatus;

A base station controlling function, the wireless network control station controlling the node _B,

The plurality of radio network control stations and the plurality of Node-Bs are connected to each other through an edge router and a core router interconnected as components of an IP-based radio access network.

The interconnection between the edge router and the core router is characterized by being configured as a transport layer of the IP backbone network.

This embodiment of the present invention will now be described with reference to the embodiment so that it can be easily carried out by those skilled in the art.

1 is a block diagram of a simulation test apparatus for verifying a video communication function according to an embodiment of the present invention.

Referring to FIG. 1, the embodiment of the present invention is a simulation test apparatus for verifying a video communication function in an IP based wireless access network rather than an ATM based wireless access network.

As shown in FIG. 1, a simulation test apparatus for verifying video communication functions in an IP-based wireless access network according to an embodiment of the present invention is a video function simulation test apparatus that generates a video call / incoming call for a video service. (100, 101, 109, 110), the Node-Bs 102 and 103 performing the base station functions of the IP-based wireless access network, the wireless network control station 107 and 108 performing the base station control function, and several radio network control stations In addition, several Node-Bs include core routers 105 and edge routers 104 and 106 interconnected as components of IP-based wireless access network 111.

As shown in Fig. 1, the video telephony service supports 3G-324M standard for the outgoing video call, and the video compression and reconstruction of H.263 standard, the end-to-end video protocol control of H.245 standard and the H.223 standard The video function simulation test apparatus 100, 101 which performs the multiplexing and demultiplexing functions of the video / audio data transmits the video call to the Node-Bs 102 and 103, and the Node-Bs 102 and 103 and several nodes. Edge router 104 interconnected by B, edge router 106 interconnected by several wireless network control stations, core router 105 interconnected with edge routers 104 and 106, and wireless network control From the video phone connected to the video function simulation apparatus 100, 101 by video call processing software to enable video communication between the video function simulation apparatus 109, 110 connected to the stations 107, 108. Switch to call mode by communication start command The other side of the image formed on the LCD Display is provided in the air subjected to image compression and decompression, the control and multiplexing protocols in accordance with the data rate previously defined, if one video service. In the case of a voice service, compression and restoration of voice data, generation and exchange of voice packet data are performed. The communication stop command from the videophone stops the data exchange and switches to the ready mode. At this time, the local image is provided on the LCD display.

In the case of an incoming video call, the video function simulation test is performed by a video communication service procedure through the reverse process of the outgoing video call from the video phone connected to the wireless network control stations 107 and 108 from the video phone connected to the apparatus 109 and 110. When the video of the other party is displayed on the LCD display of the videophone connected to the apparatus 100, 101, the wireless network control station 107, 108, the IP edge router 106, the IP core router 105, the IP edge router ( 104, and an IP address is assigned to the Node-Bs 102 and 103, and video communication is performed using the path addressed by this IP address.

The function and matching test of each subsystem of the Node-Bs 102 and 103 and the radio network control stations 107 and 108 in the radio access network 111 by providing the video telephony service function of the video call / incoming connection as described above, and By performing the video call test by connecting the entire wireless access network, the IP-based wireless access network independently performs the video service test, so that the traffic path confirmation and the function of the wireless access network of the IP routers 104, 105, and 106 can be verified.

FIG. 2 is a configuration diagram of the imaging function simulation test apparatus of FIG. 1.

Referring to Figure 2, the video function simulation test apparatus,

An IP matching unit 23 connected to the Node-B matching unit 21 and the wireless network control station matching unit 22 via a 100Base-T Ethernet interface, a physical layer processing function, an IP matching unit 23 and a data forwarding function, A control unit 24 which performs DPRAM communication with the image matching unit 25 and a video / audio data transmission and reception control function, and compresses and decompresses video and audio signals in order to provide a video and audio service. Image matching unit 25, image / audio for matching the video input device (camera) and the video output device (LCD) and the audio input device (microphone) and the audio output device (speaker) A video phone 26 having an input / output unit, and a debugging port 27 connected to the IP matching unit 23 by 100Base-T Ethernet matching and connected to a debugger personal computer 28.

The image matching unit 25 performs an image data compression and decompression processing function, an image codec module 251 performing a matching function with an image protocol module, an audio data compression and decompression processing function, and a matching function with an image protocol module. Video codec module 252, video phone interface function, multiplexing / demultiplexing protocol processing function, video control protocol processing function, video codec module 251 and video codec module 252 253, the image codec module 251 and the audio codec module 252, and the interface in the matching function with the image protocol module 253 is made of Deep-RAM communication.

In the video phone 26, the video input / output signal line is set as a path between the video codec module 251 and the camera / LCD, and the audio input / output signal line is set as a path between the audio codec module 252 and the microphone / speaker.

The IP matching unit 23 uses a 5-port switch hub, 1 port is connected to the control unit, the remaining 4 ports are connected to the outside 1 port for debugging, 1 port for matching wireless network control stations, node-B matching It is used as 1 port and spare 1 port.

In the IP-based wireless access network, the simulation test apparatus for verifying video communication function can test the video service function independently by performing the video call test by connecting the entire IP-based wireless access network.

The videophone 26 connected to the imaging function simulation apparatuses 100, 101, 109, 110 is connected to the node-B matching section 21 and the wireless network control station matching section 22 and is connected to the IP matching section 23. Is connected to.

The IP matching unit 23 performs a physical layer transmission / reception function, a media access control (MAC) function, a buffer and queue management function, and a node-B matching unit 21 and a wireless network control station matching unit 22. ), The control unit 24, and the debugging port 27 is connected to the 100Base-T Ethernet interface.

The control unit 24 which performs the physical layer processing function, the IP matching unit 23 and the data transfer function, the DPRAM communication function with the image matching unit 25, and the video / audio data transmission / reception control function is performed by the IP matching unit. The unit 23 is connected to the 100Base-T Ethernet, and the image matching unit 25 is connected to each of the deep buses to perform video and audio services according to service control commands and parameters.

The image codec module 251 configured in the image matching unit 25 has a video encoder and a video decoder connected to the camera and the LCD of the video phone 26 so as to perform compression and reconstruction of the video signal. In charge.

The image codec module 251 is connected to the image protocol module 25-3 and the defiram bus to transmit and receive image compressed data. The controller receives the control signal from the video protocol module 253 and controls the operation and data transmission timing of the H.263 codec.

The voice codec module 252, which performs voice data compression and decompression processing, and a defiram bus matching function with the video protocol module, has a voice coder and a voice decoder connected to a microphone and a speaker of the video phone 26, respectively, to convert a signal. Do this.

The video protocol module 253 performs an interface function with a video phone, a multiplexing / demultiplexing protocol processing function, a video control protocol processing function, a video codec module 251 and a voice codec module 252, and a matching function.

The video decoder of the video codec module 251 converts an analog video signal input from the video phone 26 camera into digital video data. The image encoder of the image codec module 25-1 converts digital video data into an analog video signal and outputs it to the LCD. The voice processor of the voice codec module 252 is composed of a codec and an EPLD, and converts a signal input into the microphone of the video phone 26 into a digital signal and inputs it to the voice codec unit. Digital data, which is the output of the voice codec unit, is converted to analog and output to the speaker.

It is composed of a debugging port 27 is connected to the IP matching unit 23 and 100Base-T Ethernet matching is connected to the debugger personal computer 28.

3 is a flowchart illustrating a video call processing procedure of a simulation test apparatus for verifying video communication function in an IP-based wireless access network according to the present invention. This will be described in detail as follows. The control units 32 and 36 described below are control units in the configuration of FIG. 2, and the same is true for the video phones 31 and 37, and the IP router 34 and the wireless network control station 35 are similar to those of FIG. Same thing. However, different quotation marks are given to express the plural elements. In addition, the communication between the control unit and the video phone is omitted in the video matching unit, it is omitted for convenience of description, and the operation is actually performed via the video matching unit. See also Figure 2 for the connection between the different components.

First, the video phones 31 and 37 are initialized by the controllers 32 and 36 by power-on or hardware reset (S1).

After the initialization of the video phones 31 and 37, the mobile device enters the standby mode and generates a standby approval to the controllers 32 and 36 to notify that the mobile device is normal (S2).

When the control unit 32, 36 knows that the video phone 31, 37 is normal, the control unit 32, 36 sends the current service mode to be used to the video phone 31, 37 (S3). After setting, the service mode acknowledgment is sent to the controllers 32 and 36 (S4).

The control unit 32, 36 sends a ready mode message to the video phone 31, 37 (S5) and the video phone 31, 37, which has received this, sends the preparation mode approval to the control unit 32, 36, The video service is in the ready state (S6).

When the control unit 32 starts the video service, a call start message is generated to the video phone 31 and the control unit 36. The control unit 36 sends a communication start message to the video phone 37 when receiving the communication start message (S7).

Upon receiving the communication start message, the video phone 37 sends a communication start approval message to the control unit 36 and starts to transmit the video data (S8).

The control unit 36 having received the communication start approval message sends the communication start approval message to the control unit 32 and immediately starts transmitting image data. Then, the control unit 32 receives the communication start approval message to set the video data path to start the video communication (S9).

When the video service is stopped, the controller starting the stop removes its video path while sending a call stop message to the counterpart controller and the video phone (S10).

Upon receiving the communication stop message, the video phone 31 or 37 sends a communication stop approval message to the controller 32 and 36 and stops transmitting the video data (S11).

Upon receiving the communication stop approval message, the controller 32 or 36 sends a standby mode message to the video phones 31 and 37 to wait for the next video service (S12).

According to the embodiment of the present invention as described above, the video function simulation test apparatus is arranged at the front / end of the wireless access network, and in the case of the video service test, the function and matching test of each subsystem of the IP-based wireless access network, and the entire wireless access network are connected. By performing video call test, IP-based wireless access network can be used as a test device to independently verify video service function.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

As described above, in the embodiment of the present invention, the video function simulation test apparatus is placed at the front / end of the radio access network, and in the case of the video service test, the function and matching test of each subsystem of the IP based radio access network, and the entire radio access network By performing video call test by connecting, IP-based wireless access network can be used as a test device to independently verify video service function.

1 is a block diagram of a simulation test apparatus for verifying video communication function in an IP-based wireless access network according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of the imaging function simulation test apparatus of FIG. 1.

3 is a flowchart illustrating a video call processing procedure of a simulation test apparatus for verifying video communication function in an IP-based wireless access network according to an embodiment of the present invention.

Claims (8)

An image function simulation test apparatus for testing a video communication function by connecting to an external Node-B or a wireless network control station in an IP-based wireless access network, A node-B matching unit for matching with the node-B; A wireless network control station matching unit for matching with the wireless network control station; An IP matching unit connected to the node-b matching unit and the wireless network control station matching unit through a 100Base-T Ethernet interface; An image matching unit for compressing and restoring a video and audio signal to provide a video and audio service; A video phone including an external video input device and an image output device and a video / audio input / output unit for matching the audio input device and the audio output device to verify voice and video functions; A controller for transmitting and receiving data with the IP matching unit, transmitting and receiving data with the image matching unit and a DPRAM communication method, and processing video and audio data; And a debugging port connected to the IP matching unit through Ethernet matching and connected to an external debugger personal computer. The method of claim 1, The IP matching unit uses a 5-port switch hub, 1 port is connected to the control unit, and the remaining 4 ports are connected to the outside, 1 port for debugging, 1 port for wireless network control station matching, 1 port for Node-B matching, And an imaging function simulation test apparatus, which is used as a spare 1 port. The method of claim 1, The image matching unit, An image codec module configured to compress and decompress image data; A voice codec module configured to compress and decompress voice data; And a video protocol module for interfacing with the video phone, processing a multiplexing / demultiplexing protocol, and performing a matching function with the video codec and the audio codec. The method of claim 1, And a video input / output signal line of the video phone is set as a path between the video codec module and a camera / LCD, and an audio input / output signal line is set as a path between the audio codec module and a microphone / speaker. A simulation test apparatus for verifying a video communication function in an IP-based wireless access network, A video function simulation test apparatus for performing video compression and reconstruction of video and audio signals to provide video and audio services; A Node-B, which performs a base station function of an IP-based wireless access network, and processes a signal of the imaging function simulation apparatus; A base station controlling function, the wireless network control station controlling the node _B, And the plurality of radio network control stations and the plurality of Node-Bs are connected to each other through edge routers and core routers interconnected as components of an IP-based radio access network. The method of claim 5, The video function simulation test apparatus, A node-B matching unit for matching with the node-B; A wireless network control station matching unit for matching with the wireless network control station; An IP matching unit connected to the node-b matching unit and the wireless network control station matching unit through a 100Base-T Ethernet interface; An image matching unit for compressing and restoring a video and audio signal to provide a video and audio service; A video phone having a video / audio input / output unit for matching a video input device, an image output device, and an audio input device and an audio output device to verify voice and video functions; A controller for transmitting and receiving data with the IP matching unit, transmitting and receiving data with the image matching unit and a DPRAM communication method, and processing video and audio data; And a debugging port connected to the IP matching unit through Ethernet matching and connected to an external debugger personal computer. The method according to claim 5 or 6, And the interconnection between the edge router and the core router is configured as a transport layer of an IP backbone network. The method of claim 7, wherein The image matching unit, An image codec module for converting an analog video signal input from a camera connected to the video phone into digital video data, and converting the digital video data into an analog video signal and outputting the analog video signal to an external LCD; An audio codec module for converting a signal input from the microphone of the video phone to digital, converting the digital data into analog, and outputting the analog data to a speaker of the video phone; And a video protocol module for interfacing with the video phone, processing a multiplexing / demultiplexing protocol, and performing a matching function with the video codec and the audio codec.