JP3440255B2 - Received data transfer method and device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for transferring received data in data communication, and more particularly to an increase in data access waiting time of a processor unit and an increase in data transfer across a local transfer path and a global transfer path. The present invention relates to a received data transfer method and a device that can suppress a decrease in throughput of the entire device.

[0002]

2. Description of the Related Art In a conventional received data transfer method, a communication control unit transfers the entire data received from a communication line to only one of a local data storage unit and a global data storage unit. FIG. 4 is a diagram showing an example of a conventional received data transfer device, FIG. 5 is an operation flowchart of a conventional received data transfer method, and FIG. 6 is a diagram showing a state at the end of transfer in the same conventional received data transfer method. Is. As shown in FIG. 4, the conventional received data transfer device 12
Is the communication control unit 32 connected to the communication line 2 and the global transfer path 4a, the transfer path conversion unit 52 connected to the global transfer path 4a, the external interface control unit 8, the global data storage unit 6a, and the global transfer. It was composed of a processor unit 72 connected to the path 4b and a local data storage unit 6b. An external interface line 9 is connected to the external interface controller 8. Further, the transfer path conversion unit 52 controls the transfer across the local transfer path 4b and the global transfer path 4a.

In the device 12, when data is received from the communication line 2, the communication control unit 32 may transfer the received data only to the local data storage unit 6b or only to the global data storage unit 6a. The received data was transferred as follows. (A) When transferring only to the local data storage unit 6b (see FIG. 5A and FIG. 6A), the local data storage unit 6b, the global transfer path 4a, and the local transfer path 4b are addressed to the local data storage unit 6b.
The received data for one data transfer unit defined by is transferred (step 11). Then, go to step 12. If the entire received data has been transferred, the process goes to step 13 (step 12). If not, the process returns to step 11 and the process of step 12 is repeated. The transfer process for the received data is ended (step 13). As a result, as shown in FIG. 6A, the header portion C of the received data is
1 and the body portion C2 are stored in the local data storage portion 6b. (B) When transferring only to the global transfer path 4a (see FIG. 5)
(2) and FIG. 6 (2)) The global transfer path 4a and the received data for one data transfer unit defined by the global transfer path 4a are transferred to the global transfer path 4a (step 14). Then go to step 15. If the entire received data has been transferred, the process goes to step 16 (step 15). If not, the process returns to step 14 and the process of step 15 is repeated. The transfer process for the received data is ended (step 16). As a result, as shown in FIG. 6B, the header section C1 and the body section C2 of the received data are stored in the global data storage section 6a.

[0004]

In FIG. 4, the processor unit 72 executes various processes in the apparatus 12, and the local data storage unit 6b mainly stores the data frequently accessed by the processor unit 72. The local transfer path 4b is a data bus for transferring data between the processor unit 72 and the local data storage unit 6b. The communication control unit 32 transfers data received from the communication line 2 to the inside, the external interface control unit 8 controls an interface with an external connection device, etc., and the global data storage unit 6a is a processor. It stores data accessed by the unit 72, the communication control unit 32, and the external interface control unit 8. Further, the global transfer path 4a is connected to the processor unit 72,
A data bus that transfers data between the communication control unit 32 and the external interface control unit 8 and the global data storage unit 6a, and the transfer path conversion unit 52 transfers data across the global transfer path 4a and the local transfer path 4b. To control. In general, the local transfer path 4b and the global transfer path 4a are used differently. That is, most of the local transfer path 4b is transferred by one transfer unit or several transfer units with high frequency by the access from the high speed processor unit 72. On the contrary,
Since the global transfer path 4a is involved in data transfer with the outside of the apparatus, a large amount of infrequent burst (continuous) transfer of a large amount of data by access from the communication control unit 32 and the external interface control unit 8 is common.

In general, the local transfer path 4b is faster than the global transfer path 4a, and one of the global transfer paths 4a has a larger data amount of one transfer unit than the local transfer path 4b. Therefore, the data transfer procedure (transfer protocol) on both transfer paths is also different. Due to such a difference in the transfer protocol between the transfer paths, an overhead for the protocol conversion by the transfer path conversion unit 52 has occurred when performing the data transfer across both transfer paths. On the other hand, in the device 12 or the like shown in FIG. 4, the data received from the communication line 2 is temporarily stored in the device,
In many cases, the processor unit 72 performs communication protocol processing and interface conversion processing for an external interface device during that time, and then outputs to the external interface line 9. In the processing by the processor unit 72 using such a usage method, only the header portion C1 from the beginning to the predetermined length of the received data is targeted, and the remaining body portion C2 is not concerned in many cases.

As described above, in the conventional received data transfer apparatus, when the data received from the communication line is transferred internally, it is transferred to only one of the local data storage unit and the global data storage unit. There was such a problem. (A) When transferring only to the local data storage unit, while transferring the body part of the received data to the local data storage unit, or from the local data storage unit to the external interface control unit for outputting to the external interface line. During this period, the local transfer path cannot be used, and therefore the processing of the processor unit that uses the data in the local data storage unit cannot be performed. Further, due to the overhead of transfer path conversion, the global transfer path cannot be used for a long time as compared with the transfer using only the global transfer path. (B) In the case of transferring only to the global data storage unit, as compared with the case where the header unit is stored in the local data storage unit, the processor unit accesses the header unit in the global data storage unit through the transfer path conversion unit. Therefore, the delay time becomes large, and the processor unit becomes idle during that time. Further, during this period, neither the local transfer path nor the global transfer path can be used for other transfer. Due to these causes, the throughput of the entire apparatus has decreased. An object of the present invention is to solve these conventional problems, to reduce the idle time of the processor section due to the access delay to the header section, and to transfer data across both the local transfer path and the global transfer path. An object of the present invention is to provide a received data transfer method and an apparatus capable of reducing the occupied time and improving the throughput of the entire apparatus.

[0007]

In order to achieve the above object, the received data transfer method of the present invention connects to a communication line.
And transfers the data received from the communication line to the inside.
Connected to the communication controller and external interface line,
External interface that controls the interface with the device
It is equipped with a control unit, and mainly communicates with the processor unit.
Frequently used for protocol processing and interface conversion processing
Local data storage to be accessed and the processor
Section, communication control section and external interface control section
Two types of memos with global data storage that is accessed
In addition to providing a processor,
A relatively small data unit that transfers data between data stores.
Local transfer path mainly for random transfer of
Communication control unit, external interface control unit, and global
Bulk data transfer that transfers data between
Independent of the above-mentioned local transfer path, which is mainly used for host transfer
And the local transfer above
Controls data transfer across the transfer path and global transfer path
Data transfer method of device having transfer path converter
In the above, the communication control unit controls the data from the communication line.
Is received by the communication control unit from the beginning of the data.
Main processing by the above processor up to the header length
Transfer the data to be processed to the above local data storage unit.
Sent and not processed by the processor unit after the data
The rest of the data that is often sent outside the device
Characterized by transferring to the global data storage unit
is doing. In addition, the communication control unit is connected from the communication line.
When the data is received, the communication control unit starts from the beginning of the data.
Data up to the header length held by the above local data
Transfer to both storage and global data storage
The rest of the data after that data
It is also characterized in that it is transferred to the data storage unit. Also books
The reception data transfer device of the invention is connected to a communication line,
A communication system that transfers the data received from the communication line internally
Control unit and external interface line,
Interface control unit that controls the interface of
And a communication protocol mainly from the processor section.
Access frequently for interface processing and interface conversion processing.
Stored local data storage unit and the processor unit
Access from the communication control unit and external interface control unit
Equipped with two types of memory: global data storage
In addition, the above processor and local data
Transfers data between payment departments in relatively small units of data
The local transfer route mainly for random transfer and the above communication system
Control unit, external interface control unit and global data
Burst of large amount of data that transfers data between storage units
Simultaneously independent of the above local transfer path, which is mainly for transfer
Operable global transfer path and the above local transfer path
A transfer that controls data transfer across global transfer paths.
In a device having a route conversion unit, in the communication control unit
The header part of the data received from the above communication line
Header length holding means for holding the length from the beginning of the
Control the transfer destination of the received data from the communication line,
Data up to the length held by the above header length holding means.
Data to the local data storage unit
And the subsequent data to the above global data storage
And a transfer destination control means for transferring to
There is. Further, the transfer destination control means is
Data up to the length held by the header length holding means is
Local data storage and global data storage
To both of the
It is also a feature to transfer only to the global data storage section
There is. As a result, the header section that is frequently accessed by the processor section is separately stored in the local data storage section, and the body section that is frequently accessed by the external interface control section is stored in the global data storage section. Thus, the idle time of the processor unit is reduced and the time occupied by both transfer paths for data transfer across the local transfer path and the global transfer path is reduced. Also, by dividing and storing the header part,
Since the processing by the processor section and the transfer processing of the body section of the received data can be executed concurrently in parallel, the throughput of the entire apparatus is improved. Further, by overlappingly storing the header section in both storage sections, even if the header length is variable for each received data, the data access waiting time of the processor section and the data transfer across both transfer paths increase. It is possible to suppress a decrease in throughput of the entire device.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block configuration diagram of a reception data transfer device showing an embodiment of the present invention. The device 11 shown in FIG. 1 includes a processor unit 71, a local data storage unit 6b, a communication control unit 31, an external interface control unit 8, a global data storage unit 6a, and a transfer path conversion unit 51. This is the same as the conventional configuration shown. However, in the communication control unit 31, a header length holding unit A1 that holds the length of the header portion in the reception data designated in advance, and a transfer destination control unit that controls the transfer destination corresponding to the transfer portion of the reception data It is different in that it includes B1. The local transfer path 4b is connected to the processor unit 71.
Is a transfer path between the local data storage unit 6b and the global data storage unit 6b.
a, communication control unit 31, external interface control unit 8
Is a transfer path between. The transfer path conversion unit 51 controls transfer across the local transfer path 4b and the global transfer path 4a. These functions have not changed from conventional ones.

FIG. 2 is an operation flowchart of the received data transfer method of the present invention, and FIG. 3 is a storage state diagram and a format diagram showing the structure of received data according to the received data transfer method of the present invention. When receiving the data from the communication line 2, the communication control means 31 transfers the received data in the order shown in the flow of FIG. As shown in FIG. 3, the received data C is assumed to be composed of a header portion C1 having a length designated by the contents of the header length holding means A1 and a body portion C2 after that. (A) When the header part is transferred to the local data storage part and the body part is transferred to the global data storage part in a divided manner (see FIG. 2 (1) and FIG. 3 (1)) First, when data is received, the header length is If the received data has been transferred up to the length indicated by the contents of the holding means A1 (while the body portion C2 is being transferred), the process proceeds to step 3 (step 1). Otherwise (during the transfer of the header portion C1), go to step 2. Under the control of the transfer destination control means B1, the local data storage unit 6b is addressed to the local data storage unit 6b.
Also, the received data for one data transfer unit defined by the global transfer path 4a and the local transfer path 4b is transferred (step 2). Then go to step 4. Under the control of the transfer destination control means B1, the received data for one data transfer unit defined by the global data storage 6a and the global transfer path 4a is transferred to the global data storage 6a (step 3). Then go to step 4. If the entire received data has been transferred, go to step 5 (step 4). If not, go back to step 1,
The processes up to step 3 are repeated. The transfer process for the received data is completed (step 5). As a result, as shown in FIG. 3A, the local data storage unit 6
A header portion C1 is stored in b, and a body portion C2 is stored in the global data storage portion 6a.

(B) When the header part is transferred to the local data storage part and the global data storage part in duplicate, and the body part is transferred to the global data storage part (see FIGS. 2 (2) and 3 (2)). First, if the received data has been transferred up to the length indicated by the contents of the header length holding means A1 (while the body part C2 is being transferred), the process proceeds to step 8 (step 6). If not (the header C1 is being transferred), go to step 7. The local data storage unit 6b is controlled by the transfer destination control unit B1.
The local data storage unit 6b, the global transfer path 4a, and the received data for one data transfer unit defined by the local transfer path 4b are sent to the global data storage unit 6a.
Received data of one data transfer unit defined by the global data storage unit 6a and the global transfer path 4a are transferred to the respective destinations (step 7). Then go to step 8. Under the control of the transfer destination control means B1, the global data storage unit 6 is addressed to the global data storage unit 6a.
The received data for one data transfer unit defined by a and the global transfer path 4a is transferred (step 8). Then go to step 9. If the entire received data has been transferred, go to step 10. If not, the process returns to step 6 and the processes up to step 9 are repeated. The transfer process for the received data is completed (step 10).
As a result, as shown in FIG. 3B, the header portion C1 is stored in the local data storage portion 6b, and the header portion C1 and the body portion C2 are stored in the global data storage portion 6a.

As shown in FIG. 3, the structure of the received data C has a header portion C1 storing control information such as a destination and a transmission source.
And a body portion C2 storing a signal text. The length data of the header portion C1 of the received data is stored in the header length holding means A1. Therefore, the communication control unit 31
When the transfer destination control means B1 has transferred the data up to the length indicated by the contents of the header length holding means A1, the transfer of the header portion C1 is completed. In the case (b) of this embodiment (that is, when transferring only to the global transfer path 4a), when the header length differs for each received data, the maximum length is designated in the header length holding unit A1. After that, the processor unit 71 accesses and processes only a necessary portion from the header portion C1 of the received data C transferred to the local data storage unit 6b, and the entire received data C transferred to the global data storage unit 6a. Of the above, the data transfer to the external interface control unit 8 is performed, for example, after the beginning of the true body part of the data (that is, in the middle of the header part C1). In this embodiment, for example, after the transfer of the header portion C1 of the received data C to the local data storage portion 6b is completed, the processor portion 7
The communication protocol process according to 1 is started, and in parallel with the process, the remaining part of the received data C (body part C2)
Can be transferred to the global data storage unit 6a.

As described above, in the present embodiment, of the received data from the communication line, the header section, which is frequently accessed by the processor section, is stored in the local data storage section which is efficiently accessed by the processor section, while the external section is Since the body part that is frequently accessed by the interface control part is divided and stored in the global data storage part that is efficiently accessed by the external interface control part, the processor part becomes empty due to the access delay to the header part. The time is reduced, and the time occupied by both transfer paths for data transfer across the local transfer path and the global transfer path is reduced. Further, the processing by the processor unit and the transfer of the body part of the received data can be simultaneously executed in parallel, so that the throughput of the entire device is improved. In addition, since it is possible to transfer data to both the header part local data storage part and the global data storage part in duplicate, even when the header part length is variable for each received data, the data access waiting time of the processor part increases, and
It is possible to prevent a decrease in the throughput of the entire device due to an increase in data transfer across the local transfer path and the global transfer path.

[0013]

As described above, according to the present invention,
By dividing and storing the header part and the body part of the received data in separate memories, the idle time of the processor part is reduced and the processing waiting time due to the two transfer paths being occupied by the data transfer is also reduced. be able to. Further, by dividing and storing in separate memories, the processing of the processor unit and the transfer to the external interface line can be executed in parallel, so that the throughput of the entire apparatus is improved. Further, by overlappingly storing the header section in separate memories, even when the header section length is variable, the access waiting time of the processor section is shortened and the throughput is decreased due to an increase in data transfer across two transfer paths. Can be suppressed.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a reception data transfer device showing an embodiment of the present invention.

FIG. 2 is an operation flowchart of the received data transfer method of the present invention.

FIG. 3 is a storage state diagram and a received data format diagram of a received data transfer method of the present invention.

FIG. 4 is a block diagram showing an example of a conventional received data transfer device.

FIG. 5 is an operation flowchart of a conventional received data transfer method.

FIG. 6 is a storage state diagram of a conventional received data transfer method.

[Explanation of symbols]

11, 12 ... Device, 2 ... Communication line, 31, 32 ... Communication control section, 4a ... Global transfer path, 4b ... Local transfer path, 51, 52 ... Transfer path converting section, 6a ... Global data storage section, 6b ... Local Data storage section, 71, 72 ... Processor section, 8 ... External interface control section, 9 ... External interface line, A1 ... Header length holding means, B1 ... Transfer destination control means, C ... Received data, C1 ... Received data header section , C2 ...
Body part of received data.

Claims (4)

(57) [Claims] 1. A is connected to a communication line, a communication control unit for transferring the data received from the communication line therein, is connected to the external interface line, and an external interface control unit that controls interface with an external device In addition, mainly from the processor unit, communication protocol processing and interface
The processor unit includes two types of memories: a local data storage unit that is frequently accessed for the case conversion processing , and a global data storage unit that is accessed by the processor unit, the communication control unit, and the external interface control unit. And mainly for random transfer of relatively small data units that transfer data between local data storage units
Mainly for burst transfer of large amount of data that transfers data between the local transfer path and the communication control unit, the external interface control unit, and the global data storage unit .
A global transfer path that can operate simultaneously independently of the local transfer path, and a transfer path conversion unit that controls data transfer between the local transfer path and the global transfer path. In the received data transfer method of the device provided , when the communication control unit receives data from the communication line, the communication control unit is a main processing target by the processor unit from a head of the data to a header length held by the communication control unit. Ah
Data to be transferred to the local data storage unit, and after that data is not processed by the processor unit.
A method for transferring received data, characterized in that the remaining data, which is often sent out of the device, is transferred to the global data storage unit. 2. The reception data transfer method according to claim 1, wherein the communication control unit, when receiving the data from the communication line, transfers data from the beginning of the data to a header length held by the communication control unit. A received data transfer method comprising: transferring to both the local data storage unit and the global data storage unit, and transferring the remaining data after the data to the global data storage unit. 3. A connected to the communication line, a communication control unit for transferring the data received from the communication line therein, is connected to the external interface line, and an external interface control unit that controls interface with an external device In addition, mainly from the processor unit, communication protocol processing and interface
The processor unit includes two types of memories: a local data storage unit that is frequently accessed for the case conversion processing , and a global data storage unit that is accessed by the processor unit, the communication control unit, and the external interface control unit. And mainly for random transfer of relatively small data units that transfer data between local data storage units
Mainly for burst transfer of large amount of data that transfers data between the local transfer path and the communication control unit, the external interface control unit, and the global data storage unit .
A global transfer path that can operate simultaneously independently of the local transfer path, and a transfer path conversion unit that controls data transfer between the local transfer path and the global transfer path. in the apparatus having, in the communication control portion, and the header length holding means for holding a length from the beginning of the header portion of the received data from the communication line, controls the forwarding destination of the received data from the communication line A transfer destination control means for transferring the data up to the length held by the header length holding means of the received data to the local data storage section and transferring the subsequent data to the global data storage section. Equipped with
And a received data transfer device. In the receiving data transfer apparatus according to claim 3, wherein the transfer destination control unit, a data storage local data storage unit addressed and global data up to the length of the header length holding means for holding of the received data both with and transfers the addressed section, the receiving data transfer apparatus characterized by transferring the subsequent data only addressed 該Gu global data storage unit.