JPH08305647A - Communication protocol processing system - Google Patents

Abstract

PURPOSE: To reduce the access frequency and the data transfer quantity to an operating system and also to reduce the processing time in order to attain the fast processing of a communication protocol processing system by registering a system request to a queue register means without starting a matrix control means as lone as a processing wait request is already registered to the queue register means when a data transfer request is accepted. CONSTITUTION: A system call reception means 1 refers to a queue register means 5 to decide whether a waiting state processing request is confirmed when a data transfer request is received from a user. If no waiting state processing request is confirmed, transfer data memory block 6 is secured and a matrix control means 2 is started. If the waiting state processing request is confirmed, the means 1 does not start the means 2 and registers the data transfer request to the means 5. The means 2 carries out the waiting state processing request as long as this request is already registered to the means 5 in the processing request execution end mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hierarchical communication protocol processing system such as OSI in an information communication network.

[0002]

2. Description of the Related Art Recently, for the purpose of efficiently performing communication processing, realization of communication between different models and speeding up of processing have been demanded.

Currently, ISO and CCITT are promoting standardization of OSI (0pen System Interconection) as a common communication protocol in order to realize information communication between different models.

The OSI is a communication protocol having a seven-layer structure including a physical layer, a data link layer, a network layer, a transport layer, a session layer, a presentation layer, and an application layer from the bottom.

Further, in a communication network, a communication node such as an exchange connects a communication control device to a system bus and is connected to a network transmission line via this communication control device.

The communication control device is provided with a program module for processing a hierarchical communication protocol such as OSI, and this program module is a system call receiving unit for performing interface processing with the communication node side.
A matrix control unit for setting a connection according to a communication protocol and a starting unit for receiving data and a data reception notification from a communication destination via an operating system and activating the matrix control unit are provided.

Further, the communication control device is an operating system including an input / output control function for managing allocation of peripheral devices such as a transmitting / receiving device and a network transmission line, and a kernel for managing memory and communication between respective units. It has a system (OS).

Upon receiving a system call such as a data transmission request from the communication node side, the system call reception unit notifies the matrix control unit of the data transmission request via the kernel.

The matrix control section makes a division process of transmission data according to the communication protocol and makes a data transmission request to the input / output control function. The activation unit activates the matrix control unit via the kernel when the data addressed to the computer or the data reception notification is received. At this time, the matrix control unit performs the reception process according to the communication protocol.
As the reception processing, the protocol header added at the communication destination is analyzed, and the divided data is restored based on the sequence number included in this protocol header.

In addition, in the communication protocol such as OSI, the amount of data that can be continuously transmitted is defined, and the response data (response PDU: PROTCOL DATA UNI) from the communication destination is specified.
There is a provision that the following data cannot be sent unless T) is received.

The matrix control unit sets a transmission processing unit and a reception processing unit for each layer, and these processing units perform protocol processing of transmission data and protocol processing of reception data. At the time of data transmission, the transmission processing unit of each layer divides the transmission data into prescribed data blocks according to the communication protocol of each layer, and adds a series of sequence numbers to these divided data. Then, a protocol header (PH) including a sequence number assigned to itself is added to each data block.

When receiving the data, each reception processing unit analyzes the protocol header and deletes the protocol header from the data block to restore the data when receiving the divided data blocks. Then, the restored data group is transferred to the communication processing unit of the upper layer.

The reception processing unit of the upper layer analyzes the protocol header of each data block transferred from the lower layer, deletes the protocol header from each data block, and performs data restoration processing. Then, the restored data group is transferred to the upper layer.

The same processing is repeated up to the protocol processing section of the uppermost layer to restore a single data. At this point, the matrix control unit transmits the received data to the communication node side via the kernel.

By the way, in the above-mentioned data transfer of each unit and data transfer between layers of the matrix control unit, the operating system is accessed every time data is transmitted and received,
Allocate a memory area to store the transfer data,
Since data is transferred using this memory area, there is a problem that the overhead becomes large.

Further, when processing a hierarchical communication protocol such as OSI, it is requested that the operating system be accessed at each data transfer in each layer to allocate a memory area for division processing and restoration processing. As described above, it is necessary to perform data transfer using this memory area, and there is a problem that processing takes time.

[0017]

SUMMARY OF THE INVENTION Therefore, the present invention has been made in view of the above-mentioned problems, and is directed to an operating system that occurs when data transfer in a communication control device and protocol processing of each layer are performed. It is an object of the present invention to provide an effective technique for reducing the number of times of access and data transfer amount, reducing the processing time required for communication protocol processing, and realizing high-speed communication protocol processing.

[0018]

In order to solve the above-mentioned problems, the present invention is as follows. This will be described based on the principle diagram of FIG.

The first invention is a system for executing a system request from a communication user in accordance with a plurality of hierarchical communication protocols. The system call receiving means 1, the matrix control means 2 and the waiting queue registration means 5 are provided. Is equipped with.

The system call accepting means 1 accepts a data transmission request from a communication user. At this time, the system call accepting means 1 secures an area for storing the transmission data on the memory 4, notifies the address area of this area to the matrix controlling means 2 and activates the matrix controlling means 2.

The matrix control means 2 performs protocol processing of transmission data according to each communication protocol. The input / output control means in FIG. 1 controls the communication device or the communication line to transmit the transmission data processed by the matrix control means 2 to the communication partner. This input / output control means is a function included in the operating system, for example.

The waiting queue registration means 5 temporarily registers the processing request received during the processing of the matrix control means 2. In the present invention, the system call receiving means 1
After storing the transmission data in the memory area, if there is a processing request waiting for processing by referring to the waiting queue registration means 5, the matrix control means 2 is not activated and is registered in the waiting queue registration means 5. I have to.

Further, the communication protocol control system accesses the transmission data memory block for storing the transmission data to be transmitted, the fixed memory block 8 assigned to each protocol of the matrix control means 2, and the input / output control means. The memory 4 may be provided with the transmission data management memory block 10 having the above information. At this time, the matrix control unit 2 is assumed to have a transmission processing unit for executing protocol processing of transmission data for each layer, and when the transmission processing units other than the lowest layer receive the transmission request, the transmission processing unit transmits from this transmission request. The address of the transmission data memory block 6 in which the data is stored is detected, the transmission data stored in the transmission data memory block 6 is divided into a plurality of data areas, and protocol processing is executed, and the division position is determined. The address information to be specified is stored in the fixed memory block 8. That is, the transmission processing units other than the lowest layer do not divide the transmission data, and manage only the division position and the sequence number to be added thereto. Then, when transferring the data to the transmission processing unit in the lower layer, the address of the transmission data memory block 6 and the address of the fixed memory block 8 are notified. Furthermore, the transmission processing unit of the lowest layer accesses the memory based on the address information received from the upper layer, and transmits the transmission data of the transmission data memory block 6 to the address stored in the fixed memory block 8. It has a function of dividing the divided data based on information, performing a protocol process on each divided data, and transferring the divided data to the transmission data management memory block 10 while adding a series of sequence numbers.

Further, the communication protocol control system is
A transmission data memory block 6, a transmission data management memory block 10, and a fixed memory block 8 of the memory 4.
A memory management unit for managing the payout and the refund can be provided. This memory management means receives the payout request of the transmission data management memory block 10 from the system call reception means 1 and has the same number of transmission data management memory blocks as the number of data divided by the transmission processing unit of the lowest layer. You may make it pay out 10 beforehand. Further, the memory management unit may pay out the transmission data management memory block 10 in advance for the amount of data that can be continuously transmitted by the logical connection when setting the logical connection. This memory management means
For example, the memory area is paid out or refunded via the operating system.

Further, in the case of a communication protocol control system conforming to OSI, when returning the sequence number added to the data received from the communication partner to the communication partner, the matrix control means 2 uses the waiting queue registration means. If the data waiting to be transmitted is registered in 5, the sequence number may be concatenated to this transmission data to form a single transmission data.

Next, the second invention will be described. According to a second invention, according to a plurality of layered communication protocols,
It is a communication control system that executes protocol processing of transmission / reception data, and includes a matrix control unit 2, a starting unit 3, and a memory 4.

The input / output control means in FIG. 1 controls the communication device to receive data transmitted from a communication partner. When the input / output control means receives the received data, it stores the received data in the memory 4 and notifies the starting means 3 of the address of this area.

The matrix control means 2 processes the data received by the input / output control means according to each protocol and notifies the communication user of the processed received data. The activation means 3 activates the matrix control means 2 in response to a request from the input / output control means. This starting means 3
Is for registering, for example, a subroutine for starting the matrix control means 2 on the operating system. Thereby, the operating system can activate the matrix control means 2.

The memory 4 includes a reception data memory block 7 for storing reception data, a reception data management memory block 11 for storing information for managing reception data asynchronously notified from the input / output control means, and reception from a communication partner. The response signal memory block 9 stores the response data to be processed, and the fixed memory block 8 to be allocated for each protocol processing of the matrix control means 2.

Here, when the input / output control means receives the response data transmitted from the communication partner, the starting means 3
Uses the response signal memory block 9 on the memory 4. Then, the sequence number stored in the response data is written in the response signal memory block 9, and the address of the response signal memory block 9 is notified when the matrix control means 2 is activated.

Further, when the input / output control means receives from the communication partner the data obtained by linking the response data and the data, the activation means 3 causes the memory 4 to receive the received data memory block 7 and the received data management memory block. 11 and the response signal memory block 9 and obtains the sequence number included in the response data from the response signal memory block 9.
To the received data memory block 7 and the received data management memory block 11 with management information. Then, the activation unit 3 links these memory blocks into a single memory block, and notifies the address of the linked memory block when the matrix control unit 2 is activated.

Further, a memory management means for managing payout and refund of the received data memory block 7, the received data management memory block 11, the response signal memory block 9 and the fixed memory block 8 of the memory 4 is provided. Good.

When the matrix control means 2 receives the address of the received data memory block 7 from the activation means 3, the received data management memory block 11 is received.
It is also possible to copy the management information written in the above into the fixed memory block 8 and return the received data managing memory block 11 to the memory managing means when transmitting the response data corresponding to the received data.

Further, in the response signal memory block 9, a flag for identifying whether or not it is in a processing state may be registered. At this time, the activation means 3 sets the sequence number included in the response data in the response signal memory block 9, and processes the flag immediately before notifying the matrix control means 2 of the address of the response signal memory block 9. State. Then, the matrix control means 2
Sets the flag to the unprocessed state immediately before transmitting the transmission data of the sequence number next to the sequence number.

Further, the matrix control means 2 removes the sequence number from each divided data when the communication partner receives the divided data, and embeds the last data of the divided data in the removed empty area. It may have a function of restoring the original data by concatenating the divided data that have been processed.

[0036]

According to the first aspect of the present invention, when the system call accepting means 1 receives the data transmission request from the communication user, the system call accepting means 1 refers to the waiting queue registering means 5 to determine whether or not there is a processing request in a waiting state. To determine. If there is no processing request in the waiting state, the transmission data memory block 6 for storing the transmission data is secured and the matrix control means 2 is activated. On the other hand, when there is a processing request in the waiting state, the system call acceptance means 1 registers the data transmission request in the waiting queue registration means 5 without activating the matrix control means 2. This is because when the first processing request is registered in the waiting queue registration means 5, the matrix control means 2 has already been notified of the address of the waiting queue registration means 5, so the matrix control means 2 is notified of the acceptance of the processing request. No need. That is, the matrix control means 2
At the end of the execution of the processing request, the access to the waiting queue registering means 5 determines whether or not the processing request is registered in the waiting queue registering means 5, and if the processing request is registered, the processing request is executed. Therefore, it is not necessary to notify the acceptance of each processing request.

Further, when the matrix control means 2 executes the transmission processing according to the protocol of a plurality of layers, the communication processing units other than the lowest layer do not divide the data when receiving the data transmission request from the upper layer. In addition, the protocol processing is performed by considering only the division position. Furthermore, the transmission processing unit also does not perform the sequence number for the divided data. Then, only the transmission processing unit in the lowest layer performs division processing of transmission data and addition of sequence numbers. This shortens the processing time required for data transfer between transmission processing units other than the lowest layer. Furthermore, by allocating the transmission data management memory block 10 of the number of data divided in the lowest layer in advance, it is possible to omit the payout and the payback of the memory area during the protocol processing.

Further, when the transmission data is registered in the waiting queue registration means 5, the response data can be linked to the transmission data, which improves the efficiency of the transmission process and the throughput in the transmission process of the communication partner. Can be improved.

Next, according to the second aspect of the invention, the memory management means stores a predetermined number of reception data memory blocks 7 in advance when a payout request for the reception data memory blocks 7 is received from the activation means 3. By securing the received data management memory block 11 on the memory 4, it is not necessary to pay out the memory block each time data is received.

The activating means 3 refers to the flag immediately before notifying the address of the response signal memory block 9 to the matrix control means 2 and activates the matrix control means 2 if it is in an unprocessed state and the matrix control means 2 if it is in a processed state. The control means 2 is not activated. Thus, it is possible to prevent the activation process of the matrix control means 2 from being performed unnecessarily.

Further, in the matrix control means 2, when the divided data is received by the communication partner, the sequence number is removed from each divided data, and the last data of the divided data is embedded in the removed empty area. It is not necessary to change the start address of each divided data, and it is not necessary to change the address of the entire received data.

[0042]

Embodiments of the present invention will be described below with reference to the drawings.

[0043]

First Embodiment In the first embodiment, the case where the communication protocol control system of the present invention is applied to a data communication system including a communication node 14 such as an exchange will be described as an example.

FIG. 2 is a schematic block diagram of the data communication system in this embodiment. The data communication system according to the first embodiment is configured by connecting a communication control device 15 to a communication node 14 such as an exchange.

The communication node 14 corresponds to a communication user of the present invention, and has a main CPU 14a and a main memory (MM) 14b.
Are connected by a system bus 14c. The communication control device 15 uses the system bus 14 of the communication node 14.
The local CPU 15a and the local memory 15b are connected by a local bus 15d. Further, the local bus 15d is connected to a communication device that transmits and receives data on the transmission path. A buffer memory 15c is connected on the connection path between the local bus 15d and the communication device.

FIG. 3 shows the local CP of the communication control unit 15.
The functional configuration realized by U15a executing the program of the local memory 15b is shown. As shown in the figure, the communication control device 15 includes a communication control function unit 17
And an operating system function unit (OS) 16.

The communication control function section 17 includes a system call accepting section 1, a matrix control section 2, a starting section 3, and a memory management section 12. The system call reception unit 1 receives a system call from the main CPU 14a of the communication node 14, and the operating system function unit (OS) 1
The matrix control unit 2 is activated via 6.

The matrix controller 2 has a function of executing communication protocol processing according to a system call and a function of executing protocol processing of received data when receiving data.

The activation unit 3 receives the data from the communication partner, and then the operating system function unit (OS).
It has a function of activating the matrix control unit 2 by registering a subroutine for activating the matrix control unit 2 on 16.

The memory management unit 12 issues and refunds the memory area of the local memory 15b via the kernel 18 of the operating system function unit (OS) 16.

On the other hand, the operating system function section (OS) 16 includes inter-task communication and memory management section 12.
Process for allocating a memory area required by the local memory 15b and a process for releasing this memory area, and a process for allocating a memory area required for interfacing with the communication node 14 on the main memory (MM) 14b. And a kernel 1 that manages this memory area release processing
8 is provided.

Further, the operating system function unit (OS) 16 transmits the data subjected to the communication protocol processing by the matrix control unit 2 to the network transmission path via the peripheral device such as the communication device, and the communication device receives the data. Communication control function unit 17
An input / output control unit 13 for notifying the user is provided.

The communication protocol of the first embodiment is a connection type protocol. FIG. 4 shows the main memory (MM) 14b and the local memory 15 in the first embodiment.
It is a specific example with b.

In the first embodiment, the main memory (MM) 1
4b includes a plurality of transmission data memory blocks 6 for storing transmission data and a plurality of reception data memory blocks 7 for storing reception data.

A logical connection table 150, a transmission data management memory block 10 and a reception data management memory block 11 are set in the local memory 15b. The logical connection table 150 is
It is a memory block secured for each logical connection when setting the logical connection.

In this logical connection table 150, a waiting queue registration unit for registering a system call (data transmission request) waiting for processing, a fixed memory block for storing data related to protocol processing of received data, and a communication partner. And a response signal memory block for registering the sequence number included in the response data received from.

The transmission data management memory block 10 includes
It is provided with information for accessing the input / output control unit 13, a memory block pointer indicating a storage position of another transmission data management memory block 10, and a data area for storing data that can be transmitted at one time.

The received data management memory block 11 is
The management information of the received data notified from the input / output control unit 13 is temporarily stored, and a memory block pointer indicating the storage position of another received data management memory block 11 and the main memory (MM) 14b are stored. And a data pointer indicating the address of the stored received data.

The communication protocol processing system in this embodiment is supposed to perform the processing related to the queue registration section and the processing related to the memory management section 12 for each logical connection. Then, in the logical connection table 150, the waiting queue registration unit is composed of a matrix processing waiting transmission request queue and a response data waiting transmission request queue in the figure. The memory area related to the processing of the memory management unit 12 is cut out from the kernel 18 and the cut-out transmission data management memory block storage queue for managing the transmission data management memory block 10 cut out from the kernel 18. And a cut-out reception data management memory block storage queue for managing the reception data management memory block storage queue.

In such a memory configuration, in the communication protocol processing system, the memory management unit 18 reserves one logical connection table 150 from the kernel 18 upon the setting of the logical connection. At the same time, the memory management unit 12 transfers the transmission data management memory block 10 and the reception data management memory block 11 from the kernel 18 by the number of data that can be continuously transmitted and received (determined by negotiation with the communication partner). Secure. Then, these data management memory blocks are sequentially connected to the above two queues.

Further, the response signal memory block 9 stores a sequence number detected from the response data and a flag for determining whether or not each response signal memory block 9 is in a processing state. .

The communication protocol processing in the first embodiment will be described below. FIG. 5 is a flowchart showing an operation process of the system call accepting unit 1. When the system call reception unit 1 receives the data transmission request from the communication node 14 (step 501), it accesses the waiting queue registration unit of the memory 13 (step 502) and determines whether or not the data transmission request is registered. (Step 503). Here, if the data transmission request is registered, the system call acceptance unit 1 does not notify the matrix control unit 2 of the system call acceptance message via the kernel 18 and waits for the data transmission request. It is registered in the matrix request waiting transmission queue of the registration unit (step 504).

Each time the matrix control unit 2 receives the system call reception message from the system call reception unit 1 and the response data from the communication destination, the matrix control unit 2 accesses the waiting queue registration unit and transmits the data transmission request communication protocol. Execute the process. This can reduce the number of accesses to the operating system.

Further, the matrix control unit 2 again registers the data transmission request that needs to wait for response data as a result of the communication protocol processing, in the response data waiting transmission request queue of the waiting queue registration unit.

On the other hand, when the transmission request is not registered in the waiting queue registration unit in the above step 503, the kernel 18 is accessed and the system call acceptance message is transmitted to the matrix control unit 2 (step 5).
05).

FIG. 6 is a flow chart showing the operation process of the activation unit 3 when the response data is received from the communication destination. First, when the communication device receives the response data from the communication partner, this response data is transferred to the activation unit 3 via the input / output control unit 13 of the operating system.

Upon receiving the response data (step 601), the activation section 3 detects the sequence number from the response data (step 602). When the sequence number is the initial value, the activation unit 3 accesses the response signal memory block 9 via the kernel 18 of the operating system and registers the sequence number. Also,
If the sequence number is not the initial value, the activation unit 3
The response signal memory block 9 corresponding to the connection of the response data is accessed. Then, the activation unit 3 refers to the flag of the response signal memory block 9 and determines whether or not the previously registered sequence number has been processed (flag "1") (step 603).

If the previous sequence number has been processed, the previous sequence number is overwritten with the sequence number (step 605) and a response data reception message is sent to the matrix control unit 2. do not do.

On the other hand, in step 604, if the previous sequence number is unprocessed (flag "0"), the previous sequence number is overwritten with the sequence number (step 606) and the flag "1" is set. ”
Is set (step 607), a matrix control task starting subroutine is registered in the operating system, and the matrix control unit 2 is started. At this time,
The activation unit 3 notifies the address of the response signal memory block 9 and the received message of the response data to the matrix control unit 2 (step 608).

FIG. 7 is a flow chart showing the operation process of the activation unit 3 when receiving data from the communication destination. When the activation unit 3 receives data from the communication partner via the input / output control unit 13 (step 701), one of the reception data memory blocks 7 and the reception data management unit provided beforehand from the kernel 18 of the operating system. And one of the memory blocks 11 (step 70)
2).

Then, the activation section 3 writes the received data in the acquired received data memory block 7 (step 703). Next, the activation unit 3 registers the activation subroutine of the matrix control unit 2 in the operating system and activates the matrix control unit 2 (step 704).

After that, the matrix control section 2 copies the management information of the received data to the fixed memory block 8 based on the address of the received data management memory block 11.
Then, the matrix control unit 2 performs protocol processing on the reception data in the reception data memory block 7, and then notifies the communication node 14 of the reception data. Further, the matrix control unit 2 includes a reception data management memory block 11
Is returned to the memory management unit 12.

Here, the starting unit 3 pays out a predetermined number of received data memory blocks 7 and received data management memory blocks in advance at the start of communication, that is, at the time of setting a connection, and when receiving the data, one of these memory blocks is provided. By allocating the memory block, it is not necessary to access the kernel 18 and secure the memory block each time data is received.

As described above, according to the first embodiment, it is possible to reduce the number of accesses to the operating system during data transmission, response data reception, and data reception.

As a method for securing the fixed memory block 8, a spare memory area is provided for each line (input / output control unit) used for transmission / reception, and a plurality of memory areas are secured at the time of data reception to secure the spare memory area. Therefore, the memory area may be secured from the spare memory area until the spare memory area runs out.

[0076]

Second Embodiment In the second embodiment, the matrix control unit 2 is
A case of executing a communication protocol process of multiple layers such as SI will be described.

In this case, the matrix control unit 2 uses the OSI
The communication protocol processing of the three layers of the session layer, the transport layer, and the network layer is performed. FIG.
FIG. 6 is a block diagram showing a functional configuration of a matrix control unit 2 according to the second embodiment.

The matrix control unit 2 includes, for each protocol layer, transmission processing units 2a, 20a, 21a for executing protocol processing of transmission data, and reception processing units 2b, 20b, 21b for executing protocol processing of received data. Is equipped with.

Here, the transmission processing units 2a, 20a, 21a
FIG. 9 shows an example of a protocol processing image between the reception processing units 2b, 20b, and 21b. For example, in the case of FIG. 9, when transmitting data, each transmission processing unit 2a, 20b, 21
The process b divides the protocol data unit (PDU) received from the upper layer into two protocol data units.

On the other hand, when data is received, each of the reception processing units 2b, 20b, 21b performs a process of connecting the two protocol data units (PDU) received from the lower layer into a single protocol data unit. .

Further, the transmission processing unit 21a of the lowest network layer multiplexes and receives data transmission requests transmitted from a plurality of transport connections set in the transport layer into a single network connection, The transmission data is divided according to these data transmission processing requests.

Further, the transmission processing unit 21 of the network layer
a terminates the division of the protocol data unit, and immediately before transmitting the protocol data unit, the session layer transmission processing unit 2a and the transport layer transmission processing unit 20a.
And request the addition of the protocol header in sequence, and when the addition of the protocol header of the session layer and the transport layer is completed, add the protocol header of the network layer,
The data is transferred to the transmission data management memory block 10 and transmission processing of the protocol data unit (PDU) is performed.

Furthermore, the transmission processing units 2a, 20a,
21a and the reception processing units 2b, 20b, and 21b are assigned the same number of fixed memory blocks as the settable number of connections as a part of each logical connection table 150. For example, as shown in FIG. 10, the session connection management table 150a is assigned to the session layer, the transport connection management table 150b is assigned to the transport connection layer, and the network connection management table 150c is assigned to the network layer. . In each fixed memory block of the transport layer and the session layer, as shown in FIG. 11, a head P indicating a head protocol data unit (PDU) in the data that can be transmitted to the lower layer.
An area for storing the DU pointer and the last PDU pointer indicating the last protocol data unit (PDU) is provided. Then, the transmission processing unit 20a of the transport layer manages only the leading PDU pointer and the trailing PDU pointer when dividing the protocol data unit (PDU).

That is, the transport layer transmission processing unit 2
0a accesses the pointer storage area of the fixed memory block when transmitting data to the lower layer and updates the head PDU pointer according to the number of transmitted protocol data units (PDU). On the other hand, the reception processing unit 20b
When receiving the response data from the lower layer, the pointer storage area of the fixed memory block is accessed to update the last PDU pointer according to the sequence number indicated by the response data. Then, when the last PDU pointer is updated, the transmission processing unit 20a transmits the protocol data unit (PDU) indicated by the first PDU pointer to the lower layer.

Further, since the network layer multiplexes and receives a transmission request transmitted via a plurality of connections set in the transport layer into a single network connection, a protocol header addition process is performed after the multiplexing. It is necessary to recognize the protocol data unit (PDU) which is the target of each transmission request when performing the transmission and the transmission processing. Therefore, in the second embodiment, the network connection management table 150c is provided with a network queuing area for queuing the transmission request received from each transport connection. In this network queuing area, fixed memory blocks managed by the transport layer are registered. As a result, the transmission processing unit 21a of the network protocol layer can grasp the protocol data unit (PDU) to be transmitted even after multiplexing.

Further, the reception processing unit 21 of the network layer
When receiving data received from the communication partner, b refers to the network queuing area to determine whether there is data waiting to be transmitted. If there is data waiting to be transmitted, the data b The response data with the sequence number added to the protocol header is linked to the data waiting to be transmitted.

As described above, according to the second embodiment, since the protocol header addition processing can be collectively performed in the lowest network layer, the memory area related to the protocol header addition processing is performed in the session layer and the transport layer. It is possible to reduce the number of accesses to the kernel 18 for securing / releasing

In the received data restoration process, data having a length corresponding to the empty area may be cut out from the data immediately before the division point and embedded in the empty area generated by the removal of the protocol header. By this processing, the data transfer of the entire divided data can be avoided without changing the address of the memory head (FIG. 12).
reference).

[0089]

According to the present invention, in a communication protocol control system for performing communication control processing according to a layered communication protocol, the number of operating system accesses for data transfer within the system or the data transfer processing between layers. The number of accesses to the operating system can be reduced, and the number of accesses required to activate the matrix control unit can be reduced. Furthermore, by connecting the response data to the transmission data, it is possible to improve the throughput required for the transmission processing on the communication partner side. Therefore, according to the present invention, it is possible to speed up the communication protocol processing.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a schematic block diagram of a data communication system according to the present embodiment.

FIG. 3 is a functional block diagram of a communication control device 15.

FIG. 4 is a specific example of a main memory and a local memory according to the first embodiment.

FIG. 5 is a flow chart diagram showing an operation process of a system call reception unit at the time of data transmission.

FIG. 6 is a flow chart diagram showing an operation process of an activation unit when response data is received.

FIG. 7 is a flowchart showing an operation process of a matrix control unit when receiving data.

FIG. 8 is a functional block diagram of a matrix control unit according to the second embodiment.

FIG. 9 is a processing image of a matrix control task according to the second embodiment.

FIG. 10 is a specific example of a local memory according to the second embodiment.

FIG. 11 is a specific example of a transport connection management table in this embodiment.

FIG. 12 is an image diagram of data restoration processing according to the second embodiment.

[Explanation of symbols]

1 ... System call receiving means (system call receiving section) 2 ... Matrix control means (matrix control section) 2a ... Transmission processing section 2b ... Receiving processing section 3 ... Starting means (starting section) 4 ... Memory 5 .. Wait queue registration means (wait queue registration unit) 6 .. Memory block for transmission data 7 .. Memory block for reception data 8 .. Fixed memory block 9. Memory block for response signal 10. Memory for transmission data management Block 11-Reception data management memory block 12-Memory management means (memory management unit) 13-Input / output control unit (input-output control unit) 14-Communication node 14a-Main CPU 14b-Main memory ( MM) 14c ··· System bus 15 · · Communication control device 15a · · Local CPU 15b · · Local memory 15c · · · Memory 15d ··· Local bus 16 · · Operating system function unit (OS) 17 · · Communication control function unit 18 · · Kernel 150 · · Logical connection table 150a · · Session connection management table 150b · · Transport connection management table 150c · -Network connection management table 20a-Transmission processing unit 20b-Reception processing unit 21a-Transmission processing unit 21b-Reception processing unit

Front page continued (72) Inventor Masato Yokotsuka 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (9)

[Claims] 1. A communication control system for executing a processing request from a communication user in accordance with a plurality of hierarchical connection-type communication protocols, and a system call receiving means for receiving a data transmission request from the communication user, Matrix control means that is activated when the system call reception means receives a data transmission request and executes protocol processing of transmission data; and queue queue registration that temporarily registers the processing request received during the processing of the matrix control means. The system call accepting means refers to the waiting queue registering means when a data transmission request is received from a communication user, and if the processing request waiting for processing is registered, the system control accepting means Registering the system request in the waiting queue registering means without starting Communication protocol control system according to symptoms. 2. A transmission data memory block for storing transmission data to be transmitted and a memory including a fixed memory block assigned to each logical connection of each protocol of the matrix control means, and the matrix control means. Has a transmission processing unit for executing a protocol process of transmission data for each layer, and the transmission processing units other than the lowest layer receive a transmission request,
The address of the transmission data memory block storing the transmission data is detected from this transmission request, the transmission data stored in this transmission data memory block is divided into a plurality of data areas, and protocol processing is executed. Address information for specifying the division position is stored in the fixed memory block, and a transmission request including the address of the transmission data memory block and the address of the fixed memory block is notified to the transmission processing unit of the lower layer, The transmission processing unit secures as many transmission data management memory blocks as the number of data that can be continuously transmitted for each connection on the memory, accesses the memory based on address information received from an upper layer, and transmits the transmission. The transmission data of the data memory block is transferred to the address stored in the fixed memory block. Divided based on the information, performs protocol processing on the divided data,
The communication protocol control system according to claim 1, wherein the divided data is transferred to the transmission data management memory block while adding a series of sequence numbers. 3. A transmission data memory block of the memory, a transmission data management memory block, and memory management means for managing the payout and refund of the fixed memory block, wherein the system call acceptance means receives data from a communication user. When a transmission request is received, a request for paying out the transmission data management memory block is issued to the memory management unit, and the memory management unit is divided by the transmission processing unit in the lowest layer of the matrix control unit. 3. The communication protocol control system according to claim 2, wherein a transmission data management memory block corresponding to the number of pieces of data to be distributed is issued. 4. When the response data including the sequence number added to the data received from the communication partner is returned to the communication partner, the matrix control means refers to the transmission wait data queue of the wait queue registration means. If the transmission data is registered, the response data is concatenated with the transmission data to form a single transmission data, and the communication protocol control system according to claim 1. 5. In a communication control system that executes protocol processing of transmission / reception data according to a plurality of hierarchical communication protocols, data transmitted from a communication partner is processed according to the protocol, and the received data after processing is used for communication. Control means for notifying a person, a starting means for activating the matrix control means, a received data memory block for storing received data, a received data management memory block for managing the received data memory block, and communication A response signal memory block for storing response data received from a partner, and a memory having a fixed memory block to be allocated for each protocol process of the matrix control means, wherein the activation means receives the response data from the communication partner. When received, the response message is sent from the memory. Memory block for the response signal, write the sequence number stored in the response data to the memory block for the response signal, notify the address of the memory block for the response signal to the matrix control means, When the response data and the data obtained by linking the data are received, the received data memory block, the received data management memory block, and the response signal memory block are acquired from the memory and included in the response data. A sequence number is written in the response signal memory block, the received data is written in the received data memory block, management information is set in the received data management memory block, and these memory blocks are connected to form a single block. Address of the memory block after this concatenation. Communication protocol system and notifies to the matrix control means. 6. A memory data reception memory block, a reception data management memory block, a response signal memory block, and a memory management means for managing withdrawal and refund of a fixed memory block of the memory, the memory management means comprising: When a request for paying out the received data memory block and the received data management memory block is received from the activation means, a predetermined number of each memory block is paid out in advance, and the activation means runs out of the predetermined number of memory blocks. The communication protocol control system according to claim 5, wherein the memory management means dispenses each of the set memory blocks. 7. The matrix control means, when receiving the received data management memory block from the activation means,
When the management information written in the reception data management memory block is copied to the fixed memory block and the response data corresponding to the reception data is transmitted,
7. The communication protocol control system according to claim 6, wherein the received data management memory block is returned to the memory management means. 8. The response signal memory block is registered with a flag for identifying whether or not it is in a processing state, and the starting means includes a sequence number included in response data in the response signal memory block. Is set, the flag is set to the processing state immediately before the address of the response signal memory block is notified to the matrix control means, and the matrix control means immediately before transmitting the transmission data of the sequence number next to the sequence number. 6. The flag is set to an unprocessed state in
The described communication protocol control system. 9. The matrix control means, when receiving data divided by a communication partner, removes a sequence number from each divided data, and embeds the last data of the divided data in the removed empty area, 6. The communication protocol control system according to claim 5, wherein the divided data that has been processed is connected to restore the original data.