KR0156856B1 - Apparatus and method for multi-message retransmission deal device and method thereof - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a message transmission processing device and method between a node switch and a network controller in a switching network.

2. The technical problem to be solved by the invention

The present invention provides a multi-message retransmission processing apparatus and method for regularizing retransmission time, dividing response for each message, and improving buffer operation.

3. Summary of Solution to Invention

The managed device assigns a message sequence number to each transmission message, and records the sequence number assigned to the transmission message as an index in the timer of the corresponding message to distinguish the timers for the transmission message. In addition, when a message to be transmitted from the managed device to the network controller occurs, it attaches a timer containing a message sequence number to distinguish the type of message to be transmitted and manages these timers separately. When N time-out messages are generated, only the corresponding message can be retransmitted using message sequence information on the message contained in the timer. In addition, when a node exchange sends a message to a network controller, a unique sequence number is assigned and stored in the message, and the network controller retransmits the sequence number in a response message so that the node exchange processes the response message. Make it clear. And it is possible to create a message to be retransmitted in the database by maintaining and managing the status table assigned a single sequence number in the exchange system, without assigning the transmitted message to the retransmission buffer.

4. Important uses of the invention

It is used to regulate retransmission time, divide response for each message, and improve buffer operation.

Description

Multiple message retransmission processing apparatus and method

1 is a configuration diagram of a switching network.

2 is a detailed configuration diagram of the RAU in FIG.

3a to 3e are flowcharts illustrating a multi-message retransmission process according to the present invention.

4 is a block diagram of a status table according to the present invention.

* Explanation of symbols for main parts of the drawings

11: network controller 12: packet communication unit (PCU)

13: RAU N1 ~ N4: Nodes of the switching network (exchange)

21: central processing unit 22: RAM

23: ROM 24: Clock generator

25: front panel control unit 26: communication control unit

The present invention relates to a multi-message retransmission processing apparatus and method between the managed equipment and the network controller in the switching network, and in particular, the multi-message retransmission processing apparatus and method aimed at regularizing the retransmission time, distinguishing the response for each message and efficient buffer operation It is about.

In general, as shown in FIG. 1, the switching network includes a network controller 11 which manages a plurality of node switches and a network, and a PCU 12 which is responsible for relaying between the node switches and the network controller 11. ). The node switch may be an example of an RAU (Radio Access Unit) 12 having a lower level and a higher level node switch indicated by reference numerals N1 to N4. The RAU 12 is a managed device when considering the relationship with the network controller 11.

Referring to FIG. 1, the RAU 12 receives the information necessary for operating the system from the network controller 11 and transmits the information according to the change of the operation information of the RAU 12 to the network controller 11. The RAU 12 communicates with the network controller 11 using a higher protocol. The protocol means an application layer during inter-layer communication requested by ISO.

The state of the message is corrected by the message transfer protocol (MTP), and the content and the mutual virtual flow control of the user message are handled by the application layer. Regardless of the link status of the lower layer, the application layer sends a message as 'Nr' (N: number of times, r: waiting time for operation). Quit.

If a response does not occur during a message transmission, the transmission speed Tr, the maximum time Tmax transmitted through the device driver for one message, and the time T _{re TX Max} considering the retransmission time in the MTP layer Calculate _Tx and retransmit.

However, according to the conventional retransmission method, there is a problem that it is difficult to clearly distinguish the response from the messages transmitted from the network controller 11 in response to which of the messages transmitted. In addition, when the RAU 12 transmits a message to the network controller 11, the retransmission buffer can be reused because the transmitted message is allocated to the buffer before the response message to the transmitted message is received from the network controller 11. There was also the problem of being inefficient. In addition, there was a disadvantage that the retransmission time is irregular.

Accordingly, an object of the present invention is to provide an apparatus and method for processing multiple message retransmissions, which aims at regularizing retransmission time, distinguishing response for each message, and improving buffer operation.

In order to achieve the above object, the present invention provides a message sequence number for each transmission message in a node exchange, and records the sequence number assigned to the transmission message in the timer of the message as an index. Make sure to distinguish between timers. In addition, when a message to be transmitted from the node switch to the network controller occurs, it attaches a timer that contains information to distinguish the type of message to be transmitted and manages these timers separately. When N time-out messages are generated, only the corresponding message can be retransmitted using message sequence information on the message contained in the timer. In addition, when a node exchange sends a message to a network controller, a unique sequence number is assigned and stored in the message, and the network controller retransmits the sequence number in a response message so that the node exchange processes the response message. Make it clear. And it is possible to create a message to be retransmitted in the database by maintaining and managing the status table assigned a single sequence number in the exchange system, without assigning the transmitted message to the retransmission buffer.

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

First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In addition, in the following description, many specific details such as components of specific circuits are shown, which are provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific details. It will be obvious to those skilled in the art. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The configuration of the switching network to which the present invention is applied is the same as that of FIG.

2 is a detailed configuration of the RAU 12 in the first diagram, and has the following detailed configuration to achieve the object of the present invention.

That is, the RAM 22 stores the retransmission state table. In response to the system information request message received from the network controller 11, the central processing unit 21 stores information on a message to be transmitted to the retransmission state table in correspondence with the corresponding state table index, and then stores the state table index as the message. Included in the transmission through the communication control unit 26. In addition, the central processing unit 21 attaches a timer after transmitting the message, and if a response message is not received from the network controller 11 within a predetermined time by using an operation system program stored in the ROM 23. Generates a timer message that includes the status table independence. In addition, the overall operation is controlled, such as patching the state table index from the timer message to reconstruct and retransmit the corresponding message. In addition, a clock generator 24 for providing a predetermined clock required for the operation of the central processing unit 21, and a front panel controller 25 for a user interface are provided.

3a to 3e are flow charts illustrating a multi-message retransmission process according to the present invention, and FIGS. 3a to 3e each have at least one process in view of its operation.

4 is a diagram illustrating a table provided in the RAM 22 of the second diagram according to the present invention and storing retransmission state information.

Referring to the multi-message retransmission process according to the present invention in detail based on the above-described configuration, firstly, the 3a and 3b receive any message, and if the message is a system information request message from the network controller 11; It shows the process of determining whether it is a response message by the OS.

3C is a process of storing information about a message to be transmitted to the retransmission state table in correspondence with a corresponding state table index in response to the system information request message, and storing the state table index in a timer and attaching a timer. The following shows the process of including the status table index in the message.

That is, when a message is received from the network controller 11 (303), as shown in FIG. 3C, a status table index (hereinafter referred to as STI) for storing processing information of a message to be transmitted is allocated ( 319). The STI is stored in a message for transmitting to the network controller 11 and a timer message for retransmission of the transmission message (323).

The status table (hereinafter referred to as ST) includes timer indexes and retransmission message types necessary for retransmission as shown in FIG. 4, and also records processing status information so that a jump to a routine to be processed upon receipt of a response is possible. (320-322).

After storing various information about the transmission message in the status table as described above, the timer is attached (324), and then the message is transmitted to the network controller (11) (325). The transmitted message includes the STI as described above.

Since the messages sent and received between the managed equipment and the network controller are mainly information for database matching and sharing, the DFI (Data Fetch Index) and message types are stored in the status table as above without allocating a separate retransmission buffer. This can maximize the buffer operation efficiency.

FIG. 3d illustrates a process of patching the STI and performing a response message based on the retransmission status table when the STI received from the network controller 11 is relocated and included in the message when the STI is relocated. . The network controller 11 transmits the response message to the managed device after relocating the STI to an independent area of the response message. That is, when the response message is received from the network controller 11, the STI contained in the response message is patched (313). Then, based on the status table corresponding to the patched SPI, a response message is determined (314), and additional information setting, processing, and management are performed (315). After canceling the processing of the configuration message and deleting the status information using the timer index value stored in the status table, a status free request message is generated in order to reuse the status table and the STI (316).

In other words, in order to simplify and systematize multiple response message processing, a status table of sequence numbers is assigned to independent transmission messages. After the transition and completion of various information processing on the transmission message, the state table and the sequence number are freely made and used repeatedly (buffer reuse and index reallocation) to overcome the limitation of the buffer.

3E illustrates a process of patching a state table index included in the timer message when the timer message is received from the timer message generating means and reconstructing and transmitting the corresponding message based on the retransmission state table. That is, when the timeout message is received (302), it is patched to read the state transition information corresponding to the STI value from the status table using the STI value stored at the time of setting the timer message (328, 329). In other words, increase the number of retransmissions-becomes the retransmission threshold value-collects the message information necessary for retransmission from the status table, regenerates and configures the message, and records the relevant information in the status table as described above. send. In this case, the STI value is included in the timer data for message classification.

As described above, the present invention can set an independent timer by allocating a status table when transmitting and receiving information required for system operation between the network controller and the switch, and thus has a regular retransmission time. In addition, when transmitting the same type of message, by referring to the status table by including a single number of the message in the status table, there is an advantage that a separate process for each message can be freely performed. In addition, by recording information necessary for generating a message in the status table, there is an advantage that it is possible to obtain the effect of maintaining the retransmission buffer without allocating the retransmission buffer at all. In addition, it is possible to freely execute the corresponding response processing routine for the response message of the status table relocated to each response message, and to set the timer information to be taken from the status table to release the timer to all the controllers with a single index value of the status table. It has the advantage that the message transmission process is flexible and can overcome the limitation of the buffer.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

Claims (5)

A node switch connected to a switching network and controlled by a network controller, the node switching table includes a retransmission status table and information about a message to be transmitted to the retransmission status table in response to a system information request message received from the network controller. Means for including the state table index in the message and storing the message in response to the message; and if a response message is not received from the network controller within a predetermined time after the transmission of any message, the timer message includes the state table index. And means for generating and reconstructing and retransmitting the message by patching the status table index from the timer message upon receipt of the timer message. The multi-message retransmission processing apparatus of claim 1, wherein the retransmission status table comprises an index area allocated to each message and an area for storing retransmission status information corresponding to each index. The apparatus of claim 2, wherein the retransmission status information is timer index, message type, processing status determination, retransmission count, and data patch index information. The method according to claim 1, wherein when the response message including the status table index included in the message at the time of transmission from the network controller is rearranged and received, the status table index is patched to process a response message based on the retransmission status table. And means for further processing. A method for processing a multiple message retransmission by means of a retransmission status table and a timer message generating means in a node exchange connected to a switching network and controlled by the network controller, the method comprising: receiving an arbitrary message, and the message is received from the system. Determining whether the message is an information request message or a response message by the operating system, storing information about a message to be transmitted to the retransmission status table in response to the system information request message, corresponding to the state table index, and storing the information in the timer. Storing the state table index and attaching the timer to the message after transmitting the state table index; and retransmitting the state table index included in the timer message by the timer message receiver from the timer message generator; According to the state table, A method for processing multiple message retransmissions comprising reconfiguring and transmitting a message.