JPH0720141B2 - Segmenting control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention is used for a segmenting control system of a relay logical node. In particular, the present invention relates to a segmenting control method on a relay logical node in a network system having a layered network architecture.

〔Overview〕

The present invention, in the segmenting control method, is a reception request used for receiving received data when the destination performs segmenting on received data other than the own logical node and relays and transfers it as segment data to another logical node. By diverting the block and the receive buffer as a transmission request block and a transmission buffer for transferring segment data, respectively, the buffer resources can be reduced.

[Conventional technology]

FIG. 4 is a block diagram of a conventional segmenting control device.

FIG. 5 is a diagram showing the operation of a conventional segmenting control device.

Conventionally, the segmenting control method is a relay logical node in a network system having a layered network architecture, in which the destination data other than the logical node itself is segmented, and the segment data is relayed and transferred to the destination other logical node. When doing so, it was done as shown in FIG. 4 and FIG. That is,
After the relay data format conversion 8 is applied to the reception data 14 and the start address at the time of transmission in which the reception start address of the buffer 5 is corrected is set in the request block 4, the 1st n-th segment data 12 is set to 1 The buffer resources of the n-th segment transmission request block 16 and the n-th segment transmission buffer 17 are newly secured from the system memory. Next, the start address of the nth segment transmission buffer 17 and the nth segment transmission request range are set to the nth segment transmission request block 16
, And the outgoing network header 10 and the nth segment data 12 are transferred to the nth segment transmission buffer 17. After that, the outgoing network header 10 is edited for the nth segment header 11, and a segment data transmission request is made to the destination logical node via the nth segment transmission request block 16.

Therefore, for one piece of segment data, a buffer resource for one segment transmission request block and one segment transmission buffer is newly required.

[Problems to be solved by the invention]

However, in such a conventional segmenting control method, as compared with the case where the segmenting control is not performed, the buffer resource is different for each of the request block and the transmission buffer for segment data transmission (the network path to the destination other logical node). There is a drawback that it is necessary to secure a large amount of (session multiplicity) x (segment decomposition of received data).

The present invention solves the above-mentioned drawbacks, and an object of the present invention is to provide a segmenting control method capable of reducing buffer resources.

[Means for solving problems]

The present invention comprises a relay logical node including means for inputting received data via an incoming network path and relaying and transmitting the data to a destination logical node via an outgoing network path, a buffer, and a request block. Means for setting a start address of the buffer for storing the received data in the request block, means for storing the received data in the buffer based on the start address, and an incoming network header of the received data stored in the buffer In the segmentation control method, including means for converting the output network header into transmission data, means for correcting the start address set in the request block, and means for segmenting the user data of the transmission data. The relay logical node is connected to the output network in the buffer. A means for editing the data into the nth segment header and transferring the nth user data segmented by the above segmentation means immediately after this segment header to create the nth segment data, and this nth segment It is characterized by including means for setting the range of data as the nth segment transmission request range in the request block, and means for making a transmission request for the nth segment data based on the contents of the request block.

[Action]

The relay logical node edits the outgoing network header of the transmission data into the nth segment header in the buffer, transfers the segmented nth user data of the transmission data immediately after this segment header, and transfers the nth segment data. To create. The range of the nth segment data is set in the request block as the nth segment transmission request range. Further, a transmission request for the nth segment data is issued based on the contents of this request block.
With the above operation, the buffer resource can be reduced.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. First
FIG. 1 is a block diagram of a segmenting control device according to an embodiment of the present invention. FIG. 2 is a diagram showing the operation of the segmenting control device of the present invention. In FIG. 1 and FIG. 2, the segmenting control device includes a relay logical node 1 including means for inputting the received data 14 via the incoming network path 2 and relaying the data to the destination logical node via the outgoing network path 3. , The buffer 5 and the request block 4, and the relay logical node 1 sets a start address of the buffer 5 for storing the received data 14 in the request block 4, and buffers the received data 14 based on the start address. 5, a means for storing the received data 14 stored in the buffer 5 and a means for converting the input network header 9 of the received data 14 stored in the buffer 5 into the output network header 10 to be transmission data, and correcting the start address set in the request block 4. And means for segmenting the user data of the transmission data.

Here, the feature of the present invention is that the relay logical node 1
Edits the outgoing network header 10 into the nth segment header 11 in the buffer 5 and transfers the nth user data segmented by the above segmenting means to the position immediately after this segment header. Means for creating 12; means for setting the range of the nth segment data 12 as the nth segment transmission request range 13 in the request block 4;
And means for making a transmission request for the n-th segment data 12 based on the contents of.

The operation of the segmenting control device having such a configuration will be described. FIG. 3 is a flowchart showing the operation of the segmenting control device of the present invention.

In FIG. 1 and FIG. 2, the relay logical node 1 issues a reception request to the incoming network path 2 by the request block 4 in advance. When data is received, the reception data 14 is linked from the request block 4. Stored in the buffer 5.

The request block 4 and the buffer 5 at the time of transmission used for segmenting the received data 14 and making a transmission request to the outgoing network path 3 as the segment data 15 have the same buffer resources as those at the time of reception.

In FIGS. 1 to 3, the relay data format conversion 8 is applied to the received data 14 flowing through the incoming network path 2 (S21). As a result, the input network header 9 of the received data 14 in the buffer 5 is converted into the output network header 10, and the address obtained by correcting the start address of the buffer 5 is set in the request block 4 as the start address of the buffer 5 at the time of transmission. To be done.

Next, the outgoing network header 10 in the buffer 5 during transmission
Is edited for the nth segment header 11 (S22). At this time, the network header length remains unchanged before and after editing.

Furthermore, the segmented nth segment data 12
On the same buffer 5 immediately after the nth segment header 11 (S23), and the nth segment transmission request range 13 is set in the request block 4 at the time of transmission (S24),
The request block 4 requests the outgoing network path 3 connected to the destination logical node to send the segment data 15 (S25).

〔The invention's effect〕

INDUSTRIAL APPLICABILITY As described above, the present invention has an excellent effect that the buffer resource can be reduced without newly securing the buffer resource of the system even when performing the segmenting control.

[Brief description of drawings]

FIG. 1 is a block diagram of a segmenting control device according to an embodiment of the present invention. FIG. 2 is a diagram showing the operation of the segmenting control device of the present invention. FIG. 3 is a flowchart showing the operation of the segmenting control device of the present invention. FIG. 4 is a block diagram of a conventional segmenting control device. FIG. 5 is a diagram showing the operation of a conventional segmenting control device. 1 ... Relay logical node, 2 ... Incoming network path, 3
...... Outgoing network path, 4 …… Request block, 5 ……
Buffer, 8 ... Relay data format conversion, 9 ...
Incoming network header, 10 ... Outgoing network header,
11 …… nth segment header, 12 …… segmented nth segment data, 13 …… nth segment transmission request range, 14 …… received data, 15 …… segment data, 16 …… nth segment transmission request Block, 17 ... Sending buffer for the nth segment.

Claims (1)

[Claims] 1. A relay logical node (1) including means for inputting received data via an incoming network path and relaying and transmitting it to a destination logical node via an outgoing network path, a buffer (5), and a request block (4). ) And, the relay logical node sets a head address of the buffer for storing the received data in the request block, a means for storing the received data in the buffer based on the head address, and the buffer. Means for converting the incoming network header of the received data stored in to the outgoing network header to obtain outgoing data, means for correcting the start address set in the request block, and segmenting the user data of the outgoing data. In the segmentation control method, the relay logical node is Means for editing the outgoing network header into the n-th segment header in the user and transferring the n-th user data segmented by the segmenting means immediately after this segment header to create the n-th segment data. And a means for setting the range of the nth segment data as an nth segment transmission request range in the request block, and a means for making a transmission request for the nth segment data based on the contents of the request block. A characteristic segmenting control method.