KR20080047734A - Mobile communication terminal and method of driving a transaction timer - Google Patents

Abstract

A mobile communication terminal and a method for operating a transaction timer in the mobile communication terminal are provided to prevent the setting time of the transaction timer from being terminated due to network troubles when a response message corresponding to an IMPS request message is divided into plural parts and the plural parts are received, thereby reducing the retransmission of the IMPS request message. A method for operating a transaction timer in the mobile communication terminal comprises the following steps of: dividing an IMPS(Instant Messaging Presence Services) request message, transmitting the IMPS request message to an IMPS server, and operating a timer at the same time(S320); and resetting the timer to restart counting if receiving a response message corresponding to the IMPS request message divided from the IMPS server within the termination time of the timer(S360,S370).

Description

Mobile communication terminal and method of driving a transaction timer}

1 is a block diagram showing the configuration of an IMPS system to which the present invention is applied;

2 is a block diagram showing the configuration of a mobile communication terminal according to an embodiment of the present invention;

3 is a flowchart provided to explain a transaction timer driving method of a mobile communication terminal according to an embodiment of the present invention;

4 illustrates the format of an IMPS message, and

5 is a diagram illustrating the operation of a timer upon receiving each response message after the IMPS request message is divided into three parts.

Brief description of the main parts of the drawing

10: Short Message Service Center

20: Instant Messaging and Presence Services (IMPS) server

200: mobile communication terminal

The present invention relates to a mobile communication terminal and a transaction timer driving method of the mobile communication terminal.

Instant Messaging Presence Services (IMPS) is a new technology for communication based on the Internet. It is used to exchange messages and presence information between mobile devices, mobile communication services and Internet-based instant messaging services. .

The IMPS system includes a client mounted on a specific device to implement an IMPS service, and a server that connects sessions with the clients to control status information and instant messages to be transmitted to the client.

According to the OMA IMPS specification, a client must send an IMPS request message to a server and simultaneously start a transaction timer and receive an IMPS response message from the server within 20 seconds of the transaction timer operation.

If no IMPS response message was received from the server within 20 seconds after the transaction timer operation, the client had to resend the IMPS request message to the server.

GPRS or SMS transmission scheme is used for communication between client and server for IMPS service. When using SMS, the client divides the message when one IMPS message exceeds 160 characters (the maximum SMS transmission length), and each divided IMPS message is processed by the SMSC (Short Message Service Center). To the server via).

At this time, the server should send an IMPS response message to the client for each divided IMPS request message. At this time, when one IMPS request message is divided into several IMPS request messages and transmitted to the server, the client sends each response message for the IMPS request message divided from the server to a time defined in the OMA IMPS specification, that is, a transaction. There was a problem not receiving within 20 seconds after the timer operation.

Indeed, even if the server receives the first IMPS request message that is split, a second or later split message may be waiting to be sent in the SMSC. After 20 seconds after the transaction timer is activated, the client determines that IMPS message transmission has failed and resends the IMPS message. This causes the SMSC to experience a vicious cycle in which the number of queued messages is increased. There was a case.

Accordingly, the technical problem to be achieved by the present invention is to reduce unnecessary transaction timeout by resetting the transaction timer every time a client sends a divided IMPS request message and then receives any IMPS response message from the server. It is to provide a transaction timer driving method and a mobile communication terminal of a mobile communication terminal.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. There will be.

In accordance with an aspect of the present invention, there is provided a method for driving a transaction timer of a mobile communication terminal, the method comprising: splitting an IMPS request message and transmitting the IMPS server to an IMPS server and simultaneously operating a timer; And receiving a response message corresponding to the divided IMPS request message from the IMPS server within the expiration time of the timer, resetting the timer to restart counting.

The divided IMPS request message belongs to the maximum transmission standard of SMS and is transmitted to the IMPS server via a Short Message Service Center (SMSC).

If the response message is not received from the IMPS server within the expiration time of the timer, the IMPS request message is retransmitted to the IMPS server.

When all response messages corresponding to the divided IMPS request messages are received from the IMPS server, the timer is stopped.

The mobile communication terminal according to an embodiment of the present invention includes a timer unit; A wireless transceiver; Splitting an Instant Messaging and Presence Services (IMPS) request message to the IMPS server through the wireless transceiver, simultaneously operating the timer, and responding to the split IMPS request message from the IMPS server within the expiration time of the timer. And a control unit which controls to restart the counting unit by restarting the counting unit upon receiving any one response message.

The controller divides the IMPS request message so that the IMPS request message belongs to the SMS maximum transmission standard.

If the control unit does not receive a response message from the IMPS server within the expiration time of the timer unit, the controller retransmits the IMPS request message to the IMPS server through the wireless transceiver.

When the controller receives all the response messages corresponding to the divided IMPS request message from the IMPS server, the controller stops the operation of the timer.

The expiration time of the timer unit is 20 seconds, and when 20 seconds have passed since the start of counting, the timer unit notifies the controller that the expiration time has elapsed.

Hereinafter, with reference to the accompanying drawings illustrating the present invention.

1 is a block diagram showing the configuration of an IMPS system to which the present invention is applied.

Referring to FIG. 1, the IMPS system 100 to which the present invention is applied includes a mobile communication terminal 200 as a client, a Short Message Service Center (SMSC) 10 and an IMPS server 20 as network servers.

The IMPS server 20 connects the session with the mobile communication terminal 200 which is the client and controls the status information and the instant message to be transmitted to the corresponding client.

IMPS is used to exchange messages and presence information between Internet-based instant messaging services. In other words, the two biggest features of IMPS are state services and instant messaging services.

The status service provides the status of the IMPS client, the status of the user, and the management of a list of registered users. The instant messaging service provides instant messaging, including text, video, pictures, and sound, to specific clients or other instant messaging. Allows you to send or receive to users of the system.

In this embodiment, the mobile communication terminal 200 as a client establishes a session with the IMPS server 20 and sends an IMPS request message to the IMPS server 20 to receive status information and instant messages from the IMPS server 20. To send. At this time, since the IMPS request message is transmitted as an SMS message, the IMPS request message is transmitted to the IMPS server 20 via the SMSC 10.

2 is a block diagram showing the configuration of a mobile communication terminal according to an embodiment of the present invention.

Referring to FIG. 2, the mobile communication terminal 200 includes a wireless transceiver 210, a data processor 220, a controller 230, a timer 240, a memory 250, an input unit 260, and a display. The unit 270 and the audio processor 280 are included.

The wireless transceiver 210 performs a communication function of the mobile communication terminal 200. The wireless transceiver 210 includes an RF transmitter for upconverting and amplifying a frequency of a transmitted signal, and an RF receiver for low noise amplifying and downconverting a received signal.

The data processor 220 includes a transmitter for encoding and modulating a transmitted signal and a receiver for demodulating and decoding a received signal.

The controller 230 performs overall control of the mobile communication terminal 200. In the present embodiment, the control unit 230 generates an IMPS request message, transmits the IMPS request message to the IMPS server 20 through the wireless transceiver 210, and drives the timer unit 240 together with the IMPS service. .

When the IMPS request message to be transmitted by the SMS method exceeds the maximum transmission standard (ex: 160 characters) of the SMS, the controller 230 divides the IMPS request message so as to fall within the maximum transmission standard of the SMS, and generates a split message. To the IMPS server 20.

In addition, when the response message corresponding to the split message is received within 20 seconds after the transmission of the split message from the IMPS server 20, the controller 230 checks whether all response messages corresponding to the split message are received.

When all the response messages corresponding to the split message are not received, the controller 230 resets the timer 240 to control the timer 240 to start counting again. On the contrary, when all the response messages corresponding to the split message are received, the operation of the timer unit 240 is stopped.

Meanwhile, if no response message is received within 20 seconds from the initial driving time of the timer 240 or the time when the timer 240 is reset and restarted, the controller 230 retransmits the corresponding IMPS request message.

The timer 240 is driven or stopped by the control of the controller 230, and counts 20 seconds defined in the OMA IMPS specification from the time when the controller 230 is driven, and notifies the controller 230 when 20 seconds have elapsed. In the present embodiment, the timer 240 may be implemented in hardware or software, and may be included in the controller 230 described above.

The memory unit 250 includes a program memory and data memories. The program memory stores programs for controlling a general operation of the mobile communication terminal 200, a software program for performing an IMPS service, a software program for performing an SMS service, and the like.

The input unit 260 includes various buttons for inputting numeric and text information and function buttons for setting various functions. The input unit 260 may be implemented as a keypad including a direction key, a jog dial, a touch screen, a joystick, and the like.

The display unit 270 outputs various display information output from the mobile communication terminal 200, various menu screens, etc., and includes a liquid crystal display (LCD) or an organic light emitting diode (OLED). In addition, the display unit 160 may include two or more display devices, including an external display unit and an internal display unit.

The audio processor 280 plays a function of reproducing the audio signal decoded by the data processor 220 through the speaker SPK or transmitting the audio signal generated from the microphone MIC to the data processor 220.

In addition, although not shown in the drawings, a camera module unit (not shown) for photographing a specific subject may be further included.

3 is a flowchart provided to explain a transaction timer driving method of a mobile communication terminal according to an embodiment of the present invention.

In the present embodiment, it is assumed that the IMPS request message transmitted by the mobile communication terminal 200 operating as a client in the IMPS system 100 is divided into at least two or more messages exceeding the maximum SMS transmission length.

Referring to FIG. 3, first, the mobile communication terminal 200 transmits an IMPS request message having a specific function in an SMS manner to perform an IMPS service (S310), and drives a timer 240 (S320).

That is, if the maximum length of the IMPS request message to be transmitted by the mobile communication terminal 200 exceeds 160 characters, the mobile communication terminal 200 divides the IMPS request message and then transmits the SMS. Each divided IMPS request message is transmitted to the IMPS server 20 via the SMSC 10.

4 illustrates the format of an IMPS message.

Referring to FIG. 4, the IMPS message 400 is largely composed of a header 410 and a body 420 which is a real data part, and the header 410 has five fields, that is, a wireless village (WV) 411. ), A version 413, a message type 415, a sequence number 417, and a concatenation identifier 419.

The sequence number 417 is increased by one whenever the mobile communication terminal 200 which is a client transmits an IMPS request message to the IMPS server 20. For example, when the sequence number is '23', this message indicates that the IMPS request message is transmitted to the IMPS server 20 for the 23rd time.

The connection ID 419 includes the total number of split IMPS messages and information on which of the split IMPS messages corresponds to. For example, when the IMPS request message is divided into three messages, the connection ID of the divided message may have values of 'ac', 'cc', and 'bc'.

Among these, 'ac' indicates the first message among the three divided messages, and 'cc' indicates the third message among the three divided messages. Similarly, 'bc' indicates that it is the second message among the three divided messages.

The IMPS server 20 transmits the divided response message to the mobile communication terminal 200 in response to the received IMPS request message. At this time, the response message is also transmitted to the mobile communication terminal 200 via the SMSC (10).

The mobile communication terminal 200 checks whether a response message is received within 20 seconds specified in the OMA IMPS specification after the timer 240 is driven and starts counting in step S320 (S330).

If the response message is not received within 20 seconds (S340: N), the mobile communication terminal 200 retransmits the IMPS request message to the IMPS server 20 (S345).

When a response message is received from the IMPS server 20 within 20 seconds (S340: Y), the control unit 230 of the mobile communication terminal 200 reads the connection ID of the received response message, and responds to the divided IMPS request message. Check whether all the messages have been received (S350).

When all the response messages to the divided IMPS request message are not received (S360: N), the controller 230 resets the timer 240 to control the timer 240 to start counting again from the beginning ( S370).

On the contrary, when all the response messages for the divided IMPS request message are received (S360: Y), the controller 230 stops driving the timer 240 (S380).

FIG. 5 is a diagram illustrating an operation of a timer unit when receiving an IMPS request message in three parts and receiving each response message thereto. FIG.

Referring to FIG. 5, the timer 240 starts counting at the same time as the IMPS request message is transmitted, and a response message is transmitted from the IMPS server 20.

In this embodiment, the IMPS request message is divided into three and transmitted by SMS. First, when receiving a response message (1 of 3) for the first split message from the IMPS server 20, the control unit 230 of the mobile communication terminal 200 resets the timer unit 240 so that counting starts again. To control.

Subsequently, when the response message 2 of 3 in response to the second split message is received from the IMPS server 20 to the mobile communication terminal 200, the control unit 230 of the mobile communication terminal 200 again performs the timer unit 240. Reset to control the count to start from the beginning.

Finally, when receiving the response message (3 of 3) for the third split message, all the response messages for the divided IMPS request message has been received, the control unit 230 of the mobile communication terminal 200 is a timer unit 240 Control to stop.

In the present embodiment, the example in which the response messages arrive in the order in which the IMPS request messages are divided has been described, but the arrival order of the response messages may not match the split order.

In the above-described embodiment, the case in which the response message is received within 20 seconds after the timer 240 is initialized and starts counting has been described. If no response message arrives within 20 seconds after the timer 240 starts counting, the mobile communication terminal 200 must retransmit the IMPS request message according to the OMA IMPS specification.

In the above description of the preferred embodiment of the present invention, the present invention is not limited to the above-described specific embodiment, it is common in the art to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

As described above, according to an embodiment of the present invention, when the response message for the IMPS request message is divided into multiple pieces, it is possible to prevent the setting time of the transaction timer from being expired due to network problems. Accordingly, there is an advantage that can reduce the retransmission of the IMPS request message.

Claims (10)

Dividing and sending an IMPS request message to an IMPS server and simultaneously operating a timer; And Receiving a response message corresponding to the divided IMPS request message from the IMPS server within the expiration time of the timer, resetting the timer to restart counting; and a transaction timer driving method of a mobile communication terminal. The method of claim 1, The split IMPS request message, A method of driving a transaction timer of a mobile communication terminal, which belongs to a maximum transmission standard of a short message service (SMS) and is transmitted to the IMPS server via a short message service center (SMSC). The method of claim 1, And if the response message is not received from the IMPS server within the expiration time of the timer, retransmitting the IMPS request message to the IMPS server. The method of claim 1, When the response message corresponding to the divided IMPS request message is received from the IMPS server, the operation of the transaction timer of the mobile communication terminal, characterized in that for stopping the operation of the timer. The method of claim 1, wherein the expiration time of the timer is Transaction timer driving method of a mobile communication terminal, characterized in that 20 seconds. A timer unit; A wireless transceiver; Splitting an Instant Messaging and Presence Services (IMPS) request message to the IMPS server through the wireless transceiver, simultaneously operating the timer, and responding to the split IMPS request message from the IMPS server within the expiration time of the timer. And a controller configured to reset the timer to restart counting upon receiving any one response message. The method of claim 6, wherein the control unit, And dividing the IMPS request message so that the IMPS request message falls within a maximum transmission standard of a short message service (SMS). The method of claim 6, wherein the control unit, And when the response message is not received from the IMPS server within the expiration time of the timer unit, retransmitting the IMPS request message to the IMPS server through the wireless transceiver. The method of claim 6, wherein the control unit, And when the response message corresponding to the divided IMPS request message is received from the IMPS server, stopping the operation of the timer unit. The method of claim 6, The expiration time of the timer unit is 20 seconds, And the timer unit notifies the control unit that the expiration time has elapsed when 20 seconds have elapsed since the start of counting.

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