KR100519016B1 - Server system and method for transmitting an error message to a client system - Google Patents

Abstract

The present invention relates to a server system capable of transmitting an error message to a client system and an error message transmitting method using the same. The system for providing an error message according to the present invention includes a database in which multimedia contents are recorded and stored; An error message storage unit for digitally encoding and storing an error message that can be transmitted to the client system when transmission of the corresponding multimedia content is not possible at the request of the client system; In response to the request of the client system, the status of each module and whether the corresponding multimedia content can be transmitted are checked. When the multimedia content corresponding to the request can be provided, the multimedia content is searched from the database and provided to the client system. If it is impossible to provide the content, the application module for controlling to extract the error message previously recorded and stored from the error message storage unit to transmit to the client system; When the data transmission command is issued from the application module in conjunction with the application module, the database, and the error message storage unit, the data stream of the database is selected and transmitted to the network interface unit. A data stream selector for selecting and transmitting the digitally encoded error message stream to the network interface unit; And a network interface unit which receives various request data of the client system from the network, converts the data stream selected from the data stream selector into an appropriate protocol, and transmits the data to the network.

Description

SERVER SYSTEM AND METHOD FOR TRANSMITTING AN ERROR MESSAGE TO A CLIENT SYSTEM}

The present invention relates to a method for transmitting and receiving digital data between a server and a client system, and more particularly, to a server system capable of transmitting an error message to a client system and an error message transmission method using the same.

Recently, various digital multimedia contents such as music and video have appeared, such as downloading and utilizing the multimedia contents in real time or own client system from a network and a user system, or sharing data among users. Functions are becoming more and more popular, and digital data transmission and utilization are becoming more and more common in everyday life.

Users can enjoy movies and various videos in real time by using a personal system equipped with network access means such as the Internet and digital data reproducing means, and store and manage desired audio data with their client system without purchasing a record separately. At the same time, it is possible to select and listen whenever desired, or to enjoy multimedia data in real time.

Such data transmission and reception may be performed between the management server and a plurality of client systems or between the client system and another client system.

In the related art, when the digital multimedia content existing in the AV (Audio Video) system of the server is transmitted through the network by the client AV system or another AV system, the client system needs to know the situation of the server system. For example, if you want to play the MPEG file of the server system from the client system, if the current server system is unable to transmit the data normally, the client system keeps requesting data transmission for a certain time without knowing the server's situation. Wait for a response. Thereafter, after a predetermined time elapses after the request, such as when the data transmission request time has elapsed, an error message corresponding to the result of the service failure is output to the user. In this case, the user has to wait a considerable amount of time for the server's response to come and cannot receive the desired service from the server system without understanding the problem of the server system.

Due to such a problem in the prior art, the user continues to request a request to the server system or another client system, and must wait until the system situation on the service provider side improves. Accordingly, the client side provided with the service feels inconvenient to wait for a while until the situation on the server side improves without knowing the cause of not receiving the service normally.

According to the present invention, if a normal data transmission is impossible by checking a system state of a server system in response to a request of a client system, an error message database encoded in the form of an error message is generated, and transmitted to the client side. It is an object to provide a network system.

In addition, another object of the present invention is to provide a message transmission / reception method between a network server and a client system that transmits an error message to a client through the check of the system internal state.

In the multimedia content providing system of the present invention for achieving the above object, in the multimedia content providing system for interworking with one or more client systems through a network to transmit and receive the corresponding data in response to a request of the client system, A database in which records are stored; An error message storage unit for digitally encoding and storing an error message that can be transmitted to the client system when transmission of the corresponding multimedia content is not possible at the request of the client system; In response to the request of the client system, the status of each module and whether the corresponding multimedia content can be transmitted are checked. When the multimedia content corresponding to the request is available, the corresponding multimedia content is searched from the database and provided to the client system. And, if it is impossible to provide multimedia content, the application module for controlling to extract the error message previously recorded and stored from the error message storage unit to transmit to the client system; When the data transmission command is issued from the application module in conjunction with the application module, the database, and the error message storage unit, the data stream of the database is selected and transmitted to the network interface unit. A data stream selector for selecting and transmitting the digitally encoded error message stream to the network interface unit when the error message is stored; And a network interface unit which receives various request data of the client system from a network, converts the data stream selected from the data stream selector into an appropriate protocol, and transmits the data to the network.

Preferably, the error message recorded and stored in the error message storage unit is encoded in a compressed digital data format such as MPEG.

The error message previously recorded and stored in the error message storage unit may include: a first error message indicating a user excess when a client connected to the multimedia content providing system exceeds a maximum connection number; A second error message indicating that a corresponding file cannot be opened if it is impossible to access the multimedia content data requested by the client; A third error message requesting a mode change when a server mode of the multimedia content providing system is not appropriate; When a request for a service not supported by the multimedia content providing system includes a fourth error message that cannot be performed, the corresponding error message is recorded among the error messages encoded and recorded in the error message storage unit in response to a request of the client system. Extract and transmit in real time to the client system.

In addition, the application module monitors the internal state of the multimedia content providing system itself, such as data transmission interruption state due to mechanical failure, unlimited loop state due to program error, internal resource utilization state, etc. It includes a system status watchdog for monitoring the situation to generate an error code number for the corresponding error to extract the error message from the error message storage in the form of a look-up table.

The error message transmission method of the present invention provides a multimedia content to the client system in a multimedia content providing system which interoperates with one or more client systems through a network and transmits and receives corresponding data according to a service request from the client system. A method comprising: receiving a request for providing multimedia content from the client system; A system state monitoring step of checking whether an internal state of a system for providing corresponding multimedia content is normal according to the request; Extracting, from an error message storage unit, an error message corresponding to an internal error in which the system state is not monitored in response to the request in the system state monitoring step; Selecting the extracted error message data stream through a data stream selector and transmitting the extracted error message data stream to a network in real time.

The error message extracting step may be performed by a system status watchdog that generates an error code number for the corresponding error and extracts the error message from the error message storage in the form of a lookup table.

Preferably, the error message data is encoded and stored in MPEG format.

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

EXAMPLE

1. Error message transmission system

The error message transmission system of the present embodiment refers to the same system as the multimedia content providing system described above, but is used in the meaning of describing the error message transmission function of the present invention in more detail. Hereinafter, the "error message transmission system" or the "multimedia content providing system" is used in the same sense, and even if simply referred to as "system" it will be clear that the same meaning. The term "server system" is also used interchangeably.

1 is an internal configuration diagram of a multimedia content providing system capable of transmitting an error message to a client system in real time according to an embodiment of the present invention.

The data provided to the client side by the system 100 is various digital audio data and video data, etc. The system includes a multimedia database 101 that records and stores such multimedia data such as video and audio, and the system internal error. In order to transmit the cause to the client system in the form of digital data, the error message storage unit 103, which encodes and stores message data corresponding to various causes in the form of digital data such as MPEG, in advance, acts as an internal administrator of the system. Application module 105, the application module 105, the database (extracting error message information from the error message storage unit 103 for informing the client side of the reason that can not respond to the request if data transmission is impossible) 101) and error messages When the data transmission command is issued from the application module 105 in cooperation with the unit 103, the data stream of the database 101 is selected and transmitted to the network interface unit, and the data transmission from the application module 105 is impossible. When a command is given, the data stream selector 107 selects and transmits the digitally encoded error message stream of the error message storage unit 103 to the network interface unit, and connects to a network for data transmission and reception. It is configured to include a network interface unit 115.

The multimedia database 101 records and stores various audio, flash, and video contents, and has objective data requested by a client. According to a client's request, the application module of the system retrieves the corresponding data from the multimedia database 101 and transmits the data, or according to another embodiment of the present invention, receives the corresponding data from an external second system and transmits the data back to the client. Perform the service.

The error message storage unit 103 records and stores the cause error message in the form of digital data when an internal error occurs in the system. According to one embodiment of the invention, the error message is encoded and stored in MPEG form. MPEG stands for Moving Picture Experts Group, an organization that promotes international standardization of digital color video and audio signals, compression and encoding, and multiplexing of encoded signals. The international standard set by the organization, also known as MPEG, is called the MPEG standard because it is covered by a work organization called MPEG, which is composed of experts from the International Electrotechnical Commission (IEC). The standardization work of MPEG is divided into four application fields such as MPEG 1 (for storage media), MPEG 2 (for broadcasting, communication, and storage media), MPEG 4 (for mobile communication), and MPEG 7 (multimedia information). The error message data is encoded and stored in a digital data format compressed in a high unit such as the MPEG format, and the network and data load can be reduced by using the stored compressed data when transmitting an error message of the system. The client system also has the advantage of being able to receive error messages directly on the waiting player. The error message data is not limited to MPEG and may be encoded in any form as long as it is a digital data format. Above all, a low-capacity encodeable form is preferable as a general-purpose and universal form of digital data compatible with client systems.

The multimedia database 101 and the error message storage unit 103 may be configured in different locations in one storage or may be configured as separate storage media. Preferably, the multimedia database 101 in which a large amount of data is stored is composed of a storage medium such as a magnetic disk or a magnetic tape for systematic database management, and the like. The error message storage unit is composed of a memory such as a ROM, a RAM, or the like. It may be configured as an indirect address pointer in a processing device such as a CPU in the form of a look-up table to indicate an address of actual error data of one storage that is the same as where multimedia data is stored.

2 is a view schematically showing error message data according to an embodiment of the present invention. According to FIG. 2, the error message data is encoded and stored in a separate storage space, and in reality, address information, which is indirect data as shown in the figure, is formed in the form of a look-up table. Such a lookup table exists in a register of a CPU or is stored in a separate memory and represents the location of actual error message data.

The error message storage unit 103 encodes and stores an error message for data transmission failure in a digital data format such as MPEG, and the address of the look-up table shown in FIG. 2 is the error message data. It refers to the position of. In general, each item of the lookup table 200 has a parameter, that is, a sign value (NUM, 210) and a result, that is, a sign correspondence value (Memory Address, 220). The table 200 is used to convert the input field values into result values by comparing the input fields and the parameters of the table (210, 211, 212, 213, 214, 215, 216) until the same value is obtained. do. For example, the system receiving the service request on the client side extracts an input field for the system internal error using the system internal state monitoring module. The extracted input field is compared with each of the parameters 210, 211, 212, 213, 214, 215, and 216 in the lookup table 200. 220, the corresponding error message is extracted from the extracted address, that is, the location of the actual storage space where the error message data exists, and the error message data is transmitted to the client side. The parameter corresponds to an input value referred to as an error number (ERROR NUM) 210, which is used to extract the address information 220 that is matched and recorded in the lookup table 200.

Referring to FIG. 2, when the error number 211 "0" is input, data transmission is normally possible, and thus an error message associated with the error message does not actually exist. The information mapped to the error number 211 "0" is a startup command (STARTUP C.M.D.) corresponding to the data transfer command, and the corresponding data search and transfer command is issued according to the command. Therefore, the address information of the error message storage corresponding to the error number 211 "0" becomes Empty.

If the error number (212) "1" is entered, an error has occurred because the user of the system connection has been exceeded. The error message associated with this is "Exceeded the user". BASE '. If error over (213) is entered, another location in the memory is pointed to extract the corresponding error message.In this way, the error displayed as a result of the system status monitoring is converted into an input value and the corresponding error message is returned to the client side. Will be sent. The memory address of FIG. 2 is composed of a segment address and an offset address. The segment address is indicated by a guide signal assigned to the memory, and the offset address corresponds to an address for indicating a position of an instruction or data stored in the segment. The two addresses are combined to calculate the address in memory and the corresponding command or data is read.

The application module 105 serves as a system internal task manager or a system status monitor. The application module 105 checks the status of each internal module and whether the corresponding multimedia content can be transmitted according to a request of the client system, and then responds to the request. If it is possible to provide the corresponding multimedia content, the corresponding multimedia content is searched from the database 101 and provided to the client system. If the multimedia content cannot be provided, the error is stored in the error message storage unit 103. Controls to extract the message and send it to the client system. The application module 105 may be configured as a CPU of the system or a separate control module. The application module 105 processes the detected system state by a predetermined input code, extracts the location information where the corresponding error message exists from the register, and converts the error message into an error message. The storage unit 103 issues a command to extract and transfer.

The data stream selector 107 is interlocked with the application module 105, the database 101, and the error message storage unit 103 to receive a data stream of the database when a corresponding data transfer command is issued from the application module 105. Selects and transmits the data to the network interface unit 115, and when the error message transmission command corresponding to the data transmission failure is issued from the application module 105, the digitally encoded error message stream of the error message storage unit 103 is selected. To the network interface 115.

The network interface unit 115 receives various requests of the client system from a network such as the Internet, converts the data stream selected from the data stream selector 107 into an appropriate protocol, and transmits the data to the network.

2. How to send error message

Hereinafter, an error message transmission process will be described.

First, the client system is requested to provide multimedia content.

Upon receiving the request, the application module 105 performs a system state monitoring for checking whether a system internal state for providing multimedia content is normal.

As a result of the system state monitoring, when it is monitored that an internal error that cannot respond to the request has occurred in the system state, an error message corresponding thereto is extracted from the error message storage unit 103.

The extracted error message data stream is sorted through the data stream selector 107 and transmitted to the network.

The client determines the reason for not receiving the service requested by the client by reporting the error message data transmitted from the system in the form of a message. Therefore, it is possible to determine a separate follow-up process or a later retry to receive the service provision, and it is possible to appropriately handle the client side in the occurrence of an error.

FIG. 3 is a diagram illustrating a process of transmitting error message data through internal error determination in the system described with reference to FIG. 1. FIG.

Upon receiving 301 a request for data transmission from the client system, the application module 105 monitors 303 the internal state of the system and checks whether it is capable of responding to the request of the client system. The system internal status monitoring is performed by a task manager or a system status watchdog. When an internal error is detected, the error is output as a code or a predetermined code, and the error code or code is searched and extracted as address data in which the message data stored in the memory exists through the look-up table 200 described with reference to FIG. 2. If the system state is normal enough to respond to the request, the error code is extracted as Error NUM '0', and the STARTUP CMD command is issued accordingly to retrieve and transmit the data requested by the client through the database. . If the system state is an abnormal state that cannot respond to the service request of the client, an error code is generated with a code or code other than Error NUM '0', and the corresponding error message exists in the look-up table 200. The address of the storage space is extracted. Based on the address information of the extracted error message data, the corresponding error message data stored in the database and / or other recording medium 307 is extracted and transmitted to the client system through the network (309).

4 is a diagram illustrating a screen in which error message data extracted and transmitted as described above is delivered to a client system and displayed in a message form.

The cause of system internal error that is not a network failure is (1) If the number of users allowed to access is exceeded, (2) If a file error occurs while playing the file, (3) Server mode of the system requesting service Is incorrectly set and accessed, and (4) requests for services not supported by the system are typical. In addition, there may be various forms such as a lack of available resources of the system or a server down. have. The error form is encoded on the system in advance in the form of a message shown in FIG. 4, and the application module monitoring the cause is recorded and stored in association with the code or code and the encoded message data. 4 is a diagram illustrating how such a message is output in the form of a message window through a GUI in a client system.

The first error message of FIG. 4 informs the client that normal service provision is not possible because the number of connected users exceeds the system allowance through information "user exceeded" (401). Therefore, after receiving the message 401, the client may access after a predetermined time and receive the desired service through other methods such as retrying the service request to the system or accessing another system, without knowing the cause of the conventional error. This avoids the wasteful act of trying to make duplicate requests.

The second error message of FIG. 4 informs the client that the data requested by the client is an invalid file through the information “Cannot open the file” 402. Therefore, after receiving the message 402, the client recognizes that the file existing on the system is not a valid file and thus cannot receive the requested service normally.

The third error message of FIG. 4 shows an error message when the server mode of the system requested by the client is accessed through the information "The current server mode is not appropriate. Please change the mode first" (403). . Therefore, by resetting the configuration mode of the system supporting the requested service, the client can be provided with the service through a later request. In more detail with respect to the third error message 403 according to an embodiment of the present invention, the system first searches for corresponding service data in its own database in response to a client's request. Will switch to the service mode that can be forwarded. A representative example is a DAB (Digital Audio Broadcasting) service or a remote TV service, and the system can receive a broadcast signal from the outside and convert it into a digital data stream to be relayed to the client through a network. In this case, if the client's request corresponds to the relay service, the system first searches in its own service provision mode, and if it is determined that it is impossible, then the system switches to the external forwarding service mode so that the requested service can be provided on the system. Cognitive search. At this time, if it is determined that it is available, it is determined whether the server mode requested by the client side and the switched server mode match. If it is determined that such server mode setting is not appropriate, "Current Server Mode is not suitable. Change the mode "(403) will be sent to the client. Therefore, after changing the server mode, the client can send the re-request to the system to receive the corresponding service.

The fourth error message of FIG. 4 informs the client that a service that is not provided on the system is requested through the information "You have requested a service that cannot be performed" (404). Therefore, after receiving the message 404, the client recognizes that it corresponds to a service that is not supported by the system, and can access the supported service or another system and receive the desired service.

5 is a flowchart illustrating the error message transmission process shown in FIG. 4 in more detail.

First, the system receives a service request from a client side through a network (S501).

In response to the request, it is checked whether or not a network state that can normally provide a service is checked (S503). In the case where the network state is abnormal, an error message will be transmitted according to the conventional method, and thus the description is omitted in the present invention. Thus, when the network state is normal, an error occurs in the system internal state in more detail.

If the network status is normal, the internal system status is monitored.

According to one embodiment of the invention, the system state manager determines whether the current access user exceeds the maximum allowable number (S505). If the maximum allowable number is exceeded as a result of the determination (S505), the corresponding error code (Error Num '1') is extracted and the corresponding error message "User Exceeded" (401) is encoded to the client. Transmit (S509).

If the determination result (S505) is within the allowable range, the service is determined (S507) and the process proceeds to the next step.

In the next step, it is determined whether the service requested by the client is in an access mode (S511).

As a result of the determination (S511), in the file access mode which is a service mode that can be provided on the server of the present system, the file manager is accessed to control and manage the file (S517). A file manager is a module in the operating system or environment that controls the physical placement of program files or access to them.

The file manager determines whether the file is valid (S517).

If it is determined that the file is not valid, the corresponding error code (Error Num '2') is extracted and the corresponding error message "Cannot open file" 402 transmits the encoded error message data to the client. (S520). If the determination result is that the file is valid and the service can be provided, an error code (Error Num '0') corresponding to the startup command (Start up CMD) is extracted and the corresponding data stream is transmitted to the client system through the network (S519). ).

In step S511 of determining whether the service requested by the client is in a file access mode, when it is determined that the service is not in the file access mode, that is, when the service is not provided in the default server mode, the server mode is switched. It is determined whether the service can be provided in the switched server mode (S515). Step S515 of FIG. 5 shows an embodiment of the server switching mode, and indicates a remote TV service mode. This represents a service that receives a TV signal, converts it into a digital data stream, and relays it to a client system. In addition, there may be a real-time service such as DAB channel relay.

If it is determined that the requested service is not available even in the switched server mode, the corresponding error code (Error Num '4') is extracted and the corresponding error message "You have requested a service that cannot be performed" (404) is encoded. The message data is transmitted to the client side (S523).

If it is determined in S515 that the service requested by the client is a service that can be provided in the switched server mode, the server mode of the system is checked (S521).

The server mode validity is determined through the server mode check (S525). It is determined whether the server mode requested by the client and the switched server mode match. If it is determined that such service mode setting is inappropriate, the corresponding error code (Error Num '3') is extracted and the corresponding error message " The current Server Mode is not appropriate. Change the mode first ”(403) transmits the encoded error message data to the client side (S535). If the determination result is that the file is valid and the service can be provided, an error code (Error Num '0') corresponding to the startup command is extracted, and the corresponding data stream is transmitted to the client system through the network (S527). .

The error message transmission process and the corresponding error message described with reference to FIG. 5 have described exemplary embodiments of the present invention, and the error message transmission process, method and error message form are not limited thereto, and are not limited thereto. It may be configured in more various forms. Therefore, the present invention is not limited to the embodiment of FIG. 5, and various modifications and additions are possible to those skilled in the art.

In addition, the system of the present invention is not limited to the present embodiment, and various changes can be made by any person having ordinary knowledge in the field of the present invention without departing from the gist of the present invention as claimed in the following claims. It is possible.

According to the present invention, even when a normal service is not provided according to various device conditions due to not only a network failure but also a system internal error, an error message corresponding thereto is transmitted to the client, whereby the client can appropriately respond accordingly. do. Therefore, the client side can avoid the problem of the conventional wasted response such as waiting for the service available without knowing the redundant service request or the situation unnecessarily.

1 is a diagram illustrating a system internal configuration according to an embodiment of the present invention.

2 is a block diagram showing error message data in the form of a lookup table according to an embodiment of the present invention.

3 is a block diagram showing the operation of the system of FIG.

4 is a diagram illustrating a form in which error data is output from a client system in a message form according to an embodiment of the present invention.

5 is a flowchart illustrating a process of extracting error message data according to an embodiment of the present invention.

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

105: application module

107: stream selector

115: network interface unit

200: error message look-up table

401-404: error message

Claims (7)

In the multimedia content providing system interworking with one or more client systems through a network to transmit and receive the corresponding data in response to a request of the client system, A database in which the multimedia contents are recorded and stored; An error message storage unit for digitally encoding and storing an error message that can be transmitted to the client system when transmission of the corresponding multimedia content is not possible at the request of the client system; In response to the request of the client system, the status of each module and whether the corresponding multimedia content can be transmitted are checked. When the multimedia content corresponding to the request is available, the corresponding multimedia content is searched from the database and provided to the client system. And, if it is impossible to provide multimedia content, the application module for controlling to extract the error message previously recorded and stored from the error message storage unit to transmit to the client system; When the data transmission command is issued from the application module in conjunction with the application module, the database, and the error message storage unit, the data stream of the database is selected and transmitted to the network interface unit. A data stream selector for selecting and transmitting the digitally encoded error message stream to the network interface unit when the error message is stored; And Network interface unit for receiving the various request data of the client system from the network and converts the data stream selected from the data stream selector to the appropriate protocol to the network Multimedia content providing system comprising a. The method of claim 1, And error message data recorded and stored in the error message storage unit are encoded in an MPEG format. The method of claim 1, The error message previously recorded and stored in the error message storage unit, A first error message indicating a user excess when a client connected to the multimedia content providing system exceeds a maximum access number, A second error message indicating that a corresponding file cannot be opened if it is impossible to access the multimedia content data requested by the client; A third error message requesting a mode change when the server mode of the multimedia content providing system is not appropriate; When a request for a service not supported by the multimedia contents providing system includes a fourth error message of service incapable, In response to a request of the client system, the application module monitors a system state and, when an internal error occurs, generates an error number (error NUM) and records the corresponding error message corresponding to the error message stored in the error message storage unit. Multimedia content providing system, characterized in that for extracting and transmitting in real time to the client system. The method of claim 1, The application module monitors the internal state of the multimedia content providing system itself, and monitors the data transmission interruption state due to a mechanical failure, an unlimited loop state due to a program error, and an internal resource utilization state. And a system status watchdog for generating an error code number for extracting the error message from the error message storage in the form of a lookup table. A method of providing multimedia content to a client system in a multimedia content providing system interworking with one or more client systems through a network and transmitting and receiving corresponding data in response to a service request from the client system, Receiving a request for providing multimedia content from the client system; A system state monitoring step of checking whether an internal state of a system for providing corresponding multimedia content is normal according to the request; Extracting, from an error message storage unit, an error message corresponding to an internal error in which the system state is not monitored in response to the request in the system state monitoring step; And Selecting the extracted error message data stream through a data stream selector and transmitting the extracted error message data stream to a network; Error message transmission method comprising a. The method of claim 5, The error message extracting step is performed by a system status watchdog which generates an error code number for the corresponding error and extracts the error message from the error message storage unit in the form of a lookup table. Way. The method of claim 5, And the error message data is encoded and stored in MPEG format.