KR100855347B1 - Message transmitting system based on udp control and method for the same - Google Patents

Abstract

The present invention relates to a system and method for transmitting a message based on a U-DIP control that enables to selectively increase the reliability of a U-DIP packet according to a message reliability level. According to the present invention, there is provided a reliability field setting unit for setting a value in a reliability field of a UPD packet according to the reliability of a message; A reliability check unit for storing the U-DIP packet in the retransmission buffer when the reliability field is checked in the header of the U-DIP packet; And a packet retransmitter configured to retransmit the UDI packet if a response packet does not arrive. If the reliability field is checked in the UDI packet received from the external communication network, the response packet is transmitted to the destination of the received UDI packet, and if the array attribute is set in the UDI packet, the received UDI packet is transmitted. A response packet transmitter for storing in the recombination buffer; A message receiving unit including; an array check unit for requesting retransmission of the missing UDI packet in the array by checking the arrangement order of the UDIP packets stored in the recombination buffer; In the case of requesting messages, the UIP protocol is applied, and in the case of highly important messages, the UIP protocol is applied.

 Mobile communication, UPD, trust level

Description

Message transmission system and method based on UDPI control {MESSAGE TRANSMITTING SYSTEM BASED ON UDP CONTROL AND METHOD FOR THE SAME}

1 is a functional block diagram of a message transmission system based on the UDPI control according to an embodiment of the present invention.

2 is a flowchart illustrating a method for transmitting a message based on the U-PD control in the message transmission side according to an embodiment of the present invention.

3 is a flowchart illustrating a method of transmitting a message based on the U-PIP control in a message receiving side according to an embodiment of the present invention.

** Description of the symbols for the main parts of the drawings **

100: message transmission unit 110: reliability field setting unit

120: reliability check section 130: retransmission buffer

140: retransmission timer 150: packet retransmission unit

200: message receiving unit 210: response packet transmission unit

220: recombination buffer # 230: array check unit

240: packet processing unit

The present invention relates to a system and method for transmitting a message based on a UDPI control, and more particularly, to a system and method for transmitting a message based on a UDPI control for selectively increasing the reliability of a UDPI packet according to a level of trust of a message. will be.

Protocols used with IP to send data in the form of messages between computers on the Internet include TCP and UDP. TCP is known as a connection-oriented protocol, which means that a connection is established and maintained for the time that messages are exchanged by applications at each end. TCP breaks a message into packets for IP to process and reassembles the packets into complete messages on the other side. Unlike TCP, UDP does not provide services such as dividing messages into packets, reassembling them on the other side, and in particular, does not provide a sequence of arriving data packets. Therefore, an application using UDP must be able to verify that the entire message arrived in the correct order.

UDP has a high transmission speed because the message header is small. In contrast, TCP guarantees reliability for all messages and therefore has a slow transmission rate. Use UDP for network game environments that require fast response to develop network applications. However, due to the nature of UDP, applications should always be prepared for cases where messages are not delivered or their order is reversed.

The present invention has been made to solve the conventional necessity as described above, to increase the level of trust for a message containing important information, and selectively increase the reliability of the U-DIP packet according to the level of trust of the message and transmit the reliability The present invention provides a system and method for transmitting a message based on a U-Pie control that can transmit a response message for a high-U-PDI packet.

Another object of the present invention is to provide a system and method for transmitting a message based on the U-DPI control that applies the U-DIP protocol for a message requiring a high transmission speed and a U-DIP control-based protocol for a message having a high importance. .

According to another aspect of the present invention, there is provided a UDF control-based message transmission system, comprising: a reliability field setting unit for setting a value in a reliability field of a UPD packet according to a message reliability; A reliability check unit for storing a U-DIP packet in a retransmission buffer and setting a time-out value in a retransmission timer if a reliability field is checked in a header of the U-DIP packet; A message retransmitter configured to retransmit the UDI packet if a response packet does not arrive until the time-out value of the retransmission timer has elapsed; If the reliability field is checked in the header of the U-PIP packet received from the external communication network, the response packet is transmitted to the destination of the received U-PIP packet. A response packet transmitter for storing the packet in the recombination buffer; An array check unit that checks the arrangement order of the UDIP packets stored in the recombination buffer and instructs the packet processing unit to process the packets, and, if there are missing UDIP packets in the array, requesting retransmission of the missing UDI packets; Presenting a configuration comprising a; message receiving unit comprising.

According to the present invention, there is provided a method for transmitting a message based on a UDF control. The reliability field setting unit may include: setting a value in a reliability field of a UPD packet according to a reliability of a message received from a communication application; A reliability check unit, if the reliability field is checked in the header of the UPI packet, storing the UDI packet in the retransmission buffer and setting a time-out value in the retransmission timer; The packet retransmission unit is configured to include retransmitting the UDI packet if a response packet does not arrive until the time-out value of the retransmission timer passes over time.

According to another aspect of the present invention, there is provided a method for receiving a message based on a UPI control, comprising: transmitting a response packet to the counterpart communication application if a reliability field is checked in a header of the UIP packet received from the counterpart communication application; Storing the received UDI packet in a recombination buffer if an array attribute is set in the UDI packet; Checking an arrangement order of the U-PIP packets stored in the recombination buffer and instructing the packet processing unit to process the packet if it is correct; Requesting retransmission of the missing UDI packet if there is a missing UDI packet in the array.

Hereinafter, preferred embodiments of the present invention will be described in detail according to the device configuration and method configuration.

The present invention takes advantage of the user datagram protocol (UDP), and provides a stable network service by selectively processing the UPD packet according to the trust level. UPDIP has a high transmission speed because the header of the message is small. However, there is no guarantee that the message is necessarily delivered to the receiving side, and the order of the received messages can also be reversed.

The present invention sets the level of trust for each message to guarantee message delivery and transmission order according to the level of trust, or operates like a normal UDI method. The present invention transmits a response message to the message with high confidence level. The present invention ensures the transmission order of the message by performing the recombination on the message that requires recombination.

According to the present invention, when a message is transmitted, the reliability level of each message is classified and transmitted to the receiving side, and the receiving side selectively reassembles the message according to the reliability level. The present invention delivers a response message as soon as the receiving side receives the message when the confidence level of the message is high, and the transmitting side retransmits the message until the response message arrives from the receiving side.

The present invention guarantees message transmission and message recombination in case that the message is not delivered to the receiving side or the message order is reversed when the UDI is used in an environment requiring fast response speed.

In describing the embodiments, descriptions of technical contents which are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

It is attached to describe an embodiment of the present invention, Figure 1 is a functional block diagram of a message transmission system based on the U-PIP control according to an embodiment of the present invention, Figure 2 is a message transmission side according to an embodiment of the present invention In FIG. 3 is a flowchart illustrating a method for transmitting a message based on a U-PIP control, and FIG. 3 is a flowchart illustrating a method for transmitting a message based on a U-PIP control in a message receiving side according to an embodiment of the present invention.

Referring to FIG. 1, a description will be given of a message transmission system based on a U-PIP control according to an embodiment of the present invention. Guarantees, and works like a regular UD.

The message transmission system includes a message transmitter 100 for transmitting a message and a message receiver 200 for receiving a message. The message transmitter 100 is responsible for transmitting a message based on the U-PIP control, and the message receiver 200 is responsible for transmitting a response message and reassembling a message for a message having high reliability.

The message transmission system communicates a message with a counterpart message transmission system in a network. The message transmitter 100 configured in the message transmission system is connected to the message receiver configured in the counterpart message transmission system, and the message receiver 200 configured in the message transmission system is connected to the message transmitter configured in the counterpart message transmission system.

The message transmission system uses the fast transmission speed, which is the advantage of the UDPI based on the UDPI control, and secures selective message reliability according to the confidence level of each message. Specifies the confidence level for each message in the communication application. Communication applications increase the level of trust in messages that must be delivered to the other side. The message transmission system corresponds to the transport layer, and the communication application corresponds to the session layer. The transport layer ensures reliable data transmission, and the session layer establishes a communication session for sending and receiving messages.

Message transfer systems support one-to-one, one-to-many, and many-to-many message transfers, depending on the configuration of the communication session of the communication application. The message transmission system distinguishes the ID of the UDI packet by using the IP address and port number of the UDI packet and delivers the ID to the corresponding communication application.

Subsequently, an embodiment of a message transmission system based on the UPDIP control according to the present invention will be described in detail. From the following description of the message control system based on the UPI control, the configuration of the message transmission system based on the above-described UPI control will also be clear.

The message control system based on the UPI control is composed of a message transmitter 100 for transmitting a message and a message receiver 200 for receiving a message. The message transmitter 100 includes a reliability field setting unit 110 that sets a reliability field according to the confidence level of the message. The reliability field setting unit 110 sets a value in the reliability field of the UPD packet according to the confidence level of the message. The confidence level of the message is determined in the communication application, and the reliability field setting unit 110 sets a value in the reliability field of the UPD packet according to the trust level of the message in the UDI packet separated according to the size of the message.

The message transmitter 100 checks the reliability field of the UDI packet, stores the UDI packet with the reliability field checked in the retransmission buffer 130, and sets a time-out value in the retransmission timer 140 ( 120). The reliability check unit 120 stores the UPD packet in the retransmission buffer 130 according to the value of the reliability field. The retransmission buffer 130 stores the UPD packet waiting for the response packet to arrive. When the response packet arrives, the UPD packet corresponding to the response packet is deleted from the retransmission buffer 130. The reliability checker 120 sets a time-out value in the retransmission timer 140 to transmit the U-DIP packet and wait until the response packet arrives. The reliability check unit 120 adjusts the time-out value of the retransmission timer 140 in consideration of network conditions or message reliability levels.

The message transmitter 100 includes a packet retransmitter 150 that retransmits the UPD packet of the retransmission buffer 130 when a response packet does not arrive. When the packet retransmission unit 150 receives a timer event from the retransmission timer 140, the packet retransmission unit 150 retransmits the UPD packet. The packet retransmission unit 150 retransmits the UPD packet and counts the number of retransmissions. The packet retransmission unit 150 retransmits the U-PDI packet by the predetermined number of retransmissions, and notifies the communication application of the deterioration of the communication environment when the number of U-PDI packets exceeding the predetermined retransmission number increases. When the packet retransmission unit 150 receives the retransmission request of the UDI packet, the packet retransmission unit 150 transmits the corresponding UDI packet.

The message receiving unit 200 transmits the response packet to the source of the UDI packet according to the reliability level of the UDI packet, and transmits the response packet transmitter 210 storing the UD packet in the recombination buffer 220 according to the arrangement attribute. Include. The response packet transmitter 210 determines whether the reliability field is checked in the header of the UPD packet received from the external communication network, and if the reliability field is checked, transmits the response packet to the destination of the UDI packet. The response packet transmitter 210 determines whether the array attribute is set in the header of the UDI packet, and if the array attribute is set, stores the UDI packet in the recombination buffer 220.

The message receiving unit 200 includes an array checking unit 230 which checks the arrangement order of the UDI packets stored in the recombination buffer 220 and instructs packet processing or requests retransmission of missing UDI packets if the arrangement is correct. . The array checker 230 checks the sequence of the UDIP packets stored in the recombination buffer 220 when the UDPI packets are stored in the recombination buffer 220, and if the arrangement is correct, sends the UDI packets to the packet processor 240. Pass and direct packet processing. If the array checker 230 finds the missing UDI packet in the UDI packet arrangement, the array checker 230 requests the other party's message transmission system to retransmit the missing UDI packet. When the other party's message transmission system receives the retransmission of the UDI packet, it transmits the UDI packet.

The device configuration is also implemented by a processor capable of executing a program that performs a series of procedures over time. The processor executes a work procedure that programs the operation of a module composed of devices. The processor sequentially executes the programs stored in the program memory in accordance with the scheduled task schedule or branches to the program corresponding to the generated event. The processor performs the functions and operations of the device corresponding to the task currently executed among the programmed tasks. The processor operates in different method configurations depending on the task being executed and is represented by the method module according to the operation. The operation of this method module will be described sequentially according to time flow and events.

2 is a flowchart illustrating a method for transmitting a message based on the U-PD control in the message transmission side according to an embodiment of the present invention.

The message transmission method operates in a message transmission system including a reliability field setting unit 110, a reliability check unit 120, and a packet retransmission unit 150. The message transmission method transmits / receives a message of a communication application based on a UPD control.

The communication application opens a communication session and establishes reliability in the message to be sent to the counterpart communication application. The communication application increases the reliability of the message or the number of message retransmissions when the message must be delivered to the counterpart communication application. The reliability of the message increases the transmission reliability of the UPD packet, so that the message is necessarily delivered to the receiving side. The number of message retransmissions determines how many times the message is retransmitted when the UDF packet transmission fails.

The reliability field setting unit 110 sets a value in the reliability field of the UPD packet according to the reliability of the message received from the communication application. The reliability field setting unit 110 sets a value in the reliability field of the UPD packet when the reliability of the message is high, and does not set a value in the reliability field when the reliability is low. If no value is set in the Reliability field, the UDI packet is transmitted according to the UDI protocol.

The reliability checker 120 determines whether the reliability field is set by referring to the header of the UDI packet (S101). If the reliability field is checked, the UDI packet is transmitted according to the UDI protocol and the UDL packet is retransmitted. Stored in the 130 (S102). The reliability check unit 120 sets a time-out value to the retransmission timer 140 for highly reliable transmission of the UPD packet stored in the retransmission buffer 130 (S103). The reliability checker 120 sets a time-out value for the transmitted UPD packet to wait for the response packet to be received by the retransmission timer 130 during the time-out value. If the response packet is not received, the retransmission timer 130 generates a timer event. When the response packet is received, the time-out value set in the retransmission timer 130 is released.

The packet retransmission unit 150 retransmits the UPD packet according to the timer event S201 of the retransmission timer 140. That is, the packet retransmission unit 150 retransmits the U-DPI packet when the response packet does not arrive until the time-out value of the retransmission timer 140 passes (S202) (S203). . The packet retransmission unit 150 sets the number of retransmission attempts and the retransmission interval of the UPD packet. The packet retransmission unit 150 performs retransmission of the UDI packet during the number of retransmission attempts, and processes the UDI packet and the next UDI packet according to the retransmission interval between UDI packets.

3 is a flowchart illustrating a method of transmitting a message based on the U-PD control in the message receiving side according to an embodiment of the present invention.

The message transmission method of the message receiving side is executed in a message transmission system including a response packet transmitter 210 and an array checker 230. The message transmission method handles the transmission or recombination of the response packet to the UPI packet under the UDI control.

The message transmission system receives the U-PIP packet from the counterpart communication application and immediately delivers the U-PIP packet to the communication application if the received U-PIP packet does not have an array attribute. The response packet transmitter 210 determines whether the reliability field is checked by referring to the header of the received UPD packet, and transmits the response packet to the counterpart communication application if the reliability field is checked.

The response packet transmitter 210 stores the received UDI packet in the recombination buffer 220 when an array attribute is set in the received UDI packet (S301). The recombination buffer 220 stores the U-DIP packet in which the array attribute is set. The UPI packet in which the arrangement attribute is set is delivered to the communication application after the arrangement order is correctly set in the recombination buffer 220.

The arrangement check unit 230 checks the arrangement order of the UDIP packets stored in the recombination buffer 220 (S303) and instructs the packet processing unit 240 of the communication application to process the packets (S305 and S306). The array checker 230 requests retransmission for the missing UPD packet if there is a missing UPD packet in the array (S304).

Although the present invention has been described in more detail with reference to examples, the present invention is not necessarily limited to these examples, and various modifications can be made without departing from the spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, since the reliability of the UDI packet can be selectively transmitted according to the reliability level of the message, the UDI protocol can be applied to a message requiring a high transmission rate, In this case, there is an effect of applying a protocol based on the U-PD control.

In addition, the present invention, by applying a protocol based on the control of the UDPI, and transmits the UDPI packet according to the confidence level of the message, and when receiving a response packet to the UDPI packet will have the effect of recognizing that the UDPI packet is delivered to the other party Can be.

In addition, the present invention has the effect of receiving the messages in order by the other party by transmitting the message by setting the arrangement attribute for the message of the message order is important.

Claims (6)

A reliability field setting unit for setting a value in a reliability field of the UPD packet according to the reliability of the message; A reliability check unit for storing a U-DIP packet in a retransmission buffer and setting a time-out value in a retransmission timer if a reliability field is checked in a header of the U-DIP packet; A message retransmitter configured to retransmit the UDI packet if a response packet does not arrive until the time-out value of the retransmission timer has elapsed; If the reliability field is checked in the header of the U-PIP packet received from the external communication network, the response packet is transmitted to the destination of the received U-PIP packet. A response packet transmitter for storing the packet in the recombination buffer; An array check unit that checks the arrangement order of the UDIP packets stored in the recombination buffer and instructs the packet processing unit to process the packets, and, if there are missing UDIP packets in the array, requesting retransmission of the missing UDI packets; Message receiving system comprising; UDP control-based message transmission system configured to include. The method of claim 1, wherein the reliability check unit If the reliability field is not checked in the header of the UDPI packet, the UDPI control-based message transmission system configured to transmit the UDPI packet through the UDPI protocol. The method of claim 1, wherein the packet retransmitter A UDF control-based message transmission system comprising a transmission environment setting unit for setting the number of retransmission attempts and the retransmission interval of the UDI packet. delete delete Sending a response packet to the counterpart communication application if the reliability field is checked in the header of the U-DIP packet received from the counterpart communication application; Storing the received UDI packet in a recombination buffer if an array attribute is set in the UDI packet; Checking an arrangement order of the U-PIP packets stored in the recombination buffer and instructing the packet processing unit to process the packet if it is correct; Requesting retransmission of the missing UDI packet if there is a missing UDI packet in the array.

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