WO2006035577A1 - 受信データ格納装置及び受信データ格納方法 - Google Patents
受信データ格納装置及び受信データ格納方法 Download PDFInfo
- Publication number
- WO2006035577A1 WO2006035577A1 PCT/JP2005/016416 JP2005016416W WO2006035577A1 WO 2006035577 A1 WO2006035577 A1 WO 2006035577A1 JP 2005016416 W JP2005016416 W JP 2005016416W WO 2006035577 A1 WO2006035577 A1 WO 2006035577A1
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- WO
- WIPO (PCT)
- Prior art keywords
- data
- pointer
- address
- received
- packet data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/90—Buffering arrangements
- H04L49/901—Buffering arrangements using storage descriptor, e.g. read or write pointers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/90—Buffering arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/90—Buffering arrangements
- H04L49/9031—Wraparound memory, e.g. overrun or underrun detection
Definitions
- the present invention relates to a store-and-forward received data storage apparatus and received data storage method connected to a network.
- FIG. 4 is a configuration diagram showing a received data storage device as a related technique.
- the received data storage device 2 ′ is connected to the network 1.
- reception data storage device 2 ′ The configuration of the reception data storage device 2 ′ will be described with reference to FIG.
- IGF circuit Interface circuit 3
- the information addition circuit 4 is connected to the output of the IZF circuit 3!
- a notafer (FIFO) 5 is connected to the information addition circuit 4.
- the data transfer control circuit 6 is connected to the buffer 5 ′.
- the main memory 7 is connected to the data transfer control circuit 6!
- the IZF circuit 3 When receiving a packet addressed to the received data storage device 2 ′ from the network 1, the IZF circuit 3 generates received packet data 8.
- Received packet data 8 includes, for example, packet data # 0, which is head data, packet data # 1, ..., packet data # (N—1), and packet data #N, which is final data. Formed from.
- the information addition circuit 4 'counts the number of received packet data 8 and generates the number of packet data as additional information data. Further, the information-added circuit 4 ′ generates information / received packet data 9 ′ obtained by combining the received packet data 8 and the number of packet data.
- Received packet data 9 includes, for example, packet data # 0, packet data # 1, ..., packet data # (N—1), packet data #N, and the number of packet data Forces are formed. The number of packet data is added after packet data #N, which is the final data.
- Noffer 5 sequentially pushes information (received packet data 9) (PUSH) to receive information Packet data 9 'is temporarily stored.
- PUSH received packet data 9
- the data transfer control circuit 6 confirms that all of the information and received packet data 9 'are stored in the buffer 5'. In addition, the data transfer control circuit 6 confirms that there is no abnormality in the data length of the information / reception packet data 9 ′. Further, the data transfer control circuit 6 confirms that there is no abnormality in the cyclic redundancy check (CRC) code of the information “received packet data 9”.
- the CRC code is a code used in a method for detecting whether an error has occurred during data transfer.
- the data transfer control circuit 6 stores all of the information ⁇ received packet data 9 'in the buffer 5', and the information 'received packet data 9' has no abnormality in the data length of the information ⁇ received packet data 9 '.
- the data (information. Data corresponding to the received packet data 9 ') stored in the notch 5 is popped (POP) and transferred to the main memory 7.
- the main memory 7 stores the data transferred from the data transfer control circuit 6 (information ⁇ data corresponding to the received packet data 9 ′). Data stored in the main memory 7 is used for predetermined processing by a microcomputer (not shown).
- the received data storage device of FIG. 4 operates in a store-and-forward manner.
- the data transferred to the main memory 7 (information ⁇ data corresponding to the received packet data 9 ') is only a normal packet, so transfer of useless error packets Can be deleted.
- FIG. 5 is a configuration diagram showing another received data storage device as a related technique.
- elements equivalent to those in FIG. 4 are denoted by the same reference numerals and description thereof is omitted.
- the configuration of the received data storage device 2 ′ ′ will be described with reference to FIG.
- the received packet data buffer (FIFO) 10 is connected to the IZF circuit 3.
- the additional information data buffer (FIFO) 11 is connected to the information-added data circuit 4 ''.
- the read control circuit 12 is connected to the received packet data buffer 10 and the additional information data buffer 11.
- the data transfer control circuit 6 ′ is connected to the read control circuit 12.
- received data storage device 2 ′ ′ shown in FIG. 5 An operation of received data storage device 2 ′ ′ shown in FIG. 5 will be described. The description of the same operation as that of the reception data storage device 2 ′ shown in FIG. 4 is omitted. Even in the received data storage device 2 ′ ′ in FIG. 5, the information addition circuit 4 ′ ′ counts the number of received packet data 8 and Data number is generated.
- the additional information data buffer 11 sequentially pushes (PUSH) the number of packet data, temporarily stores the number of packet data, and generates additional information data 14.
- the additional information data 14 is formed of, for example, a packet data number # 0, a packet data number # 1,..., A packet data number # (N—1), and a packet data number #N.
- Received packet data buffer 10 sequentially pushes received packet data (PUSH), temporarily stores received packet data, and generates received packet data 13.
- the received packet data 13 shown in FIG. 5 corresponds to the received packet data 8 shown in FIG.
- the read control circuit 12 switches between the output of the received packet data buffer 10 and the output of the additional information data buffer 11.
- the data transfer control circuit 6 stores all of the received packet data 13 in the received packet data buffer 10, and the received packet data 13 and the additional information data 14 have no abnormalities in the respective data lengths.
- each data stored in the received packet data buffer 10 and the additional information data buffer 11 is popped (POP) and transferred to the main memory 7.
- the received data storage device of FIG. 5 operates in a store-and-forward manner, similarly to the received data storage device of FIG.
- Japanese Patent No. 3473975 and Japanese Patent No. 2539614 are referred to as related technologies.
- the data transfer control circuit 6 is connected to the main memory 7.
- a bus protocol that notifies the transfer destination of the number of transfer data at the start of data transfer for example,
- the PCI-X bus cannot be used.
- the data transfer control circuit 6 is a packet data of information ⁇ received packet data 9 '.
- the data transfer control circuit 6 receives the packet data # 0 of information ⁇ received packet data 9 ' If there is a means (not shown) for temporarily storing the data that pops the packet data #N, the data transfer control circuit 6 transfers the number of packet data to the main memory 7 and then transfers the packet data. # Packet data # N can be transferred from 0. Therefore, in this case, the PCI-X bus can be used for connection between the data transfer control circuit 6 and the main memory 7.
- the use efficiency of the buffer resource constituted by the received packet data buffer 10 and the additional information data buffer 11 is poor.
- the processing when an overflow occurs in one of the received packet data buffer 10 and the additional information data buffer 11 becomes complicated.
- the received data storage device of FIG. 5 is large and expensive with many components.
- An object of the present invention is to provide a received data storage device and a received data storage method that are small, “simple”, low in cost and high in transfer efficiency.
- the present invention provides an information addition circuit for generating additional information data to be added to received packet data received via a network, and a buffer for temporarily storing the received packet data and the additional information data And a data transfer control circuit that transfers the data stored in the buffer to a main memory by a store-and-forward method, and the buffer is formed by a continuous address, and a ring memory that stores the data,
- a ring memory control circuit for controlling the ring memory, and the ring memory control circuit receives, as an address pointer for the ring memory, a write pointer for designating an address for sequentially pushing the received packet data, and the additional information data. Designate a predetermined address to push and read And the read permission pointer to specify, the main memory And a read pointer for designating addresses that are sequentially popped.
- the ring memory control circuit uses the address of the read permission pointer as the address of the write pointer, and increments the address of the write pointer.
- the ring memory stores, for each address, an identification tag that identifies the received packet data and the additional information data.
- the ring memory control circuit In the received data storage device, the ring memory control circuit generates a full signal based on the read pointer and the write pointer, generates a ready signal based on the read pointer and the read permission pointer, and adds the information
- the write pointer is incremented based on the push signal assertion from the circuit
- the read pointer is incremented based on the pop signal assertion from the data transfer control circuit
- the additional information data includes the received packet. Indicates the number of data.
- the present invention provides an information addition circuit for generating additional information data to be added to received packet data received via a network, a buffer for temporarily storing the received packet data and the additional information data,
- a received data storage method of a received data storage device comprising: a data transfer control circuit for transferring data stored in a buffer to a main memory by a store-and-forward method, wherein the buffer is a ring formed by a continuous address A step of pushing the received packet data to the ring memory and incrementing the address of the write pointer; and pushing the additional information data to the ring memory based on the read permission pointer;
- the address is the address of the write pointer
- a received data storage method comprising: incrementing the address of the write pointer; and popping the data stored in the ring memory based on the read permission pointer and incrementing the address of the read pointer.
- the present invention generates additional information data to be added to received packet data received via a network and an identification tag for identifying the received packet data and the additional information data, and the received packet data and the additional information data And a set of identification tags Information that consists of information ⁇
- An information addition circuit that generates received packet data, a buffer that temporarily stores the information ⁇ received packet data, and data transfer that transfers the data stored in the buffer to the main memory in a store-and-forward manner
- the buffer includes a ring memory formed by unbroken addresses, and the address of the read pointer and the address of the read permission pointer are the same.
- the write pointer address becomes a value obtained by incrementing the read pointer address, the push signal assert from the information-added card circuit is detected, and the ring memory is read based on the identification tag.
- the received data storage device and the received data storage method it is possible to provide a received data storage device and a received data storage method that are small, simple and low in cost and high in transfer efficiency.
- a no protocol such as a PCI-X bus that notifies the transfer destination of the number of transfer data at the start of data transfer can be used for the connection between the data transfer control circuit and the main memory.
- a received data storage device and a received data storage method that efficiently process data transfer.
- the peripheral circuit can be easily formed.
- FIG. 1 is a configuration diagram showing an embodiment of the present invention.
- FIG. 2] (a) to FIG. 2 (d) are diagrams showing the positions at the time of push in the ring memory 16 of the embodiment of FIG. FIG.
- FIG. 3] (a) to FIG. 3 (c) are diagrams showing a pointer at the time of pop in the ring memory 16 of the embodiment of FIG.
- FIG. 4 is a block diagram showing a received data storage device as a related technique.
- FIG. 5 is a configuration diagram showing another received data storage device as a related technique.
- FIG. 1 is a block diagram showing an embodiment of the present invention.
- elements equivalent to those in FIG. 4 are denoted by the same reference numerals and description thereof is omitted.
- the information addition circuit 4 outputs a push signal (PUSH signal) 18 and information ⁇ reception packet data (PUSH data) 9 to a buffer (FIFO) 5.
- Buffer 5 is
- the full signal (FULL signal) 19 is output to the information addition circuit 4.
- the data transfer control circuit 6 outputs a pop signal (POP signal) 20 to the buffer 5.
- the buffer 5 outputs information / reception packet data (POP data) 17 and a ready signal (READY signal) 21 to the data transfer control circuit 6.
- the buffer 5 includes a ring memory 16 formed with unbroken addresses, and a ring memory control circuit 15 that controls the ring memory 16.
- the information addition circuit 4 counts the number of received packet data 8 and generates the number of packet data as additional information data. Further, the information addition circuit 4 generates an identification tag for identifying the received packet data 8 and the number of packet data for each address.
- the identification tag for packet data # 0 is the first data
- the identification tag for packet data # 1 is the intermediate data
- the identification tag for packet data # (N—1) is the intermediate data
- the identification tag for N is the final data
- the identification tag for the number of packet data is the additional information data.
- Packet data # 0 and the leading data are combined, packet data # 1 and intermediate data are combined, and packet data # (N—1) and intermediate data are combined into a packet data
- # N and final data form a pair
- the number of packet data and additional information data form a pair
- the information addition circuit 4 includes a set of packet data # 0 and head data, a set of packet data # 1 and intermediate data, ..., packet data # (N-1) and intermediate data. A pair of packet data #N and the final data, a pair of the number of packet data and additional information data, and the information and received packet data 9 are generated.
- Received packet data 9 is received packet data 8 (packet data # 0, packet data Data # 1, ..., data consisting of packet data # (N-1), packet data #N) and the number of packet data, and an identification tag (first data, intermediate data, ... intermediate data, final data, (Additional information data).
- Received packet data 17 includes, for example, the number of packet data, packet data # 0, packet data # 1, ..., packet data # (N—1), packet data #N, Forces are formed. That is, the number of packet data is added before packet data # 0 which is the head data.
- FIG. 2 and 3 are diagrams showing pointers in the ring memory 16 of the embodiment of FIG. 1.
- the ring memory control circuit 15 is a write pointer Wp as an address pointer to the ring memory 16. And a read permission pointer Ep and a read pointer Rp.
- the ring memory 16 is formed with unbroken addresses (not shown).
- FIG. 2 is a diagram showing a pointer at the time of pushing in the ring memory 16 of the embodiment of FIG.
- seven addresses correspond to information / received packet data 9.
- the packet head data “SOP” in FIG. 2 corresponds to the set of the packet data # 0 and the head data of the information “received packet data 9” in FIG.
- the packet intermediate data “MOPO” in FIG. 2 corresponds to the set of packet data # 1 and intermediate data in the information.
- Received packet data 9 in FIG. The packet intermediate data “ ⁇ 1” in FIG. 2 corresponds to the set of the packet data # 2 and the intermediate data in the information / received packet data 9 in FIG.
- the packet intermediate data “MOP2” in FIG. 2 corresponds to the combination of the packet data # 3 and the intermediate data in the information and received packet data 9 of FIG.
- the packet intermediate data “MOP3” in FIG. 2 corresponds to the set of the packet data # 4 and the intermediate data of the received packet data 9 in FIG.
- the final packet data “EOP” in FIG. 2 corresponds to the combination of the packet data # 5 and the intermediate data in the information.
- the packet additional information data “INFO” in FIG. 2 corresponds to the combination of the number of packet data and additional information data in the information received packet data 9 in FIG.
- the address of the read pointer is the same as the address of the read permission pointer
- the address of the write pointer is the address of the read pointer (the address of the read permission pointer).
- each address pointer satisfies the following relationship (1) to relationship (3).
- the absolute value of the read pointer address and the read permission pointer address may be any value.
- FIG. 2 (a) is a diagram showing such an initial state.
- the ring memory control circuit 15 detects the assertion of the PUSH signal 18 from the information-added circuit 4 and, based on the identification tag, stores the information / received packet data 9 ( The received packet data 8) is pushed and the address of the write pointer Wp is incremented Step S12 is executed.
- the ring memory control circuit 15 pushes the packet head data SOP to the address of the write pointer Wp of the ring memory 16, and then increments the address of the write pointer Wp.
- FIG. 2B is a diagram showing a state in which the packet head data SOP is pushed and then the address of the write pointer Wp is incremented.
- the ring memory control circuit 15 pushes one of the packet intermediate data MOP0 to packet intermediate data MOP3 to the address of the write pointer Wp of the ring memory 16, and then the write pointer Wp Increment the address.
- the ring memory control circuit 15 pushes the packet final data EOP to the address of the write pointer Wp of the ring memory 16, and then increments the address of the write pointer Wp.
- FIG. 2 (c) shows a state in which the packet final data EOP is pushed and then the address of the write pointer Wp is incremented.
- the ring memory control circuit 15 detects the assertion of the PUSH signal 18 from the information-added circuit 4 and pushes the number of packet data to the ring memory 16 based on the identification tag.
- the address of the read permission pointer Ep is used as the address of the write pointer Rp, and step S13 for incrementing the address of the write pointer Wp is executed.
- the ring memory control circuit 15 pushes the attached information data INFO to the address of the read permission pointer Ep of the ring memory 16, and then the address of the read permission pointer Ep. Is used as the address of the write pointer Wp, and the address of the write pointer Wp is incremented.
- the read permission pointer Ep designates a predetermined address for pushing the additional information data INFO. That is, the read permission pointer Ep acts as a pointer for storing the additional information data INFO.
- the additional information data INFO is stored before the portion corresponding to the received packet data 8.
- Fig. 2 (d) shows a state where additional information data "INFO" is pushed to the address, and then the address of the read permission pointer Ep is set to the address of the write pointer Wp and the address of the write pointer Wp is incremented. It is.
- the ring memory control circuit 15 generates a F ULL signal 19 based on the read pointer Rp and the write pointer Wp.
- the ring memory control circuit 15 asserts the FULL signal 19 when the following relationship (4) is satisfied, and negates the FULL signal 19 when the following relationship (5) is satisfied.
- the FULL signal 19 is asserted when no more data can be stored in the ring memory 16. In other words, when the number of addresses in the ring memory 16 is smaller than the information 'the number of received data 9 addresses + 1', the FULL signal 19 is asserted.
- the information-added circuit 4 stops the transfer of the information 'received packet data 9'.
- the ring memory control circuit 15 is based on the read pointer Rp and the read permission pointer Ep. Step S14 for generating the READY signal 21 is executed. Ring memory control circuit 15
- the READY signal 21 is asserted.
- the READY signal 21 is negated.
- Read pointer Rp! Read permission pointer Ep (6)
- the READY signal 21 is asserted when a transferable data card is stored in the ring memory 16. Then, the data transfer control circuit 6 asserts the POP signal 20 based on the READY signal 21 assertion.
- FIG. 3 is a diagram showing a pointer at the time of pop in the ring memory 16 of the embodiment of FIG. Note that the same elements as those in FIG.
- the ring memory control circuit 15 detects the assertion of the POP signal 20 from the data transfer control circuit 6, and pops the data stored in the ring memory 16 to address the read pointer Rp. Step S15 for incrementing is executed.
- FIG. 3 (a) is a diagram showing a state in which the packet-attached card information data INFO is popped and the address of the read pointer Rp is incremented. At this time, the address of the read pointer Rp is the address of the packet head data SOP.
- FIG. 3 (b) shows the packet head data SOP and the intermediate packet data (after the state of FIG. 3 (a)).
- FIG. 3 (c) is a diagram showing a state in which the packet final data EOP is popped and the address of the read pointer Rp is incremented. At this time, the address of the read pointer Rp becomes the address of the read permission pointer Ep, which satisfies the relationship (1) to the relationship (3). That is, the state of FIG. 3 (c) is the same as the state of FIG. 2 (a). Also, READY signal 21 is negated based on the relationship (7) described above.
- the read permission pointer Ep designates and permits a readable address. That is, the read permission pointer Ep acts as a read permission pointer that can read valid data.
- the read permission pointer Ep has a function as a pointer for storing additional information data INFO and a function as a read permission pointer from which valid data can be read.
- the information / received packet data 17 in the embodiment of FIG. 1 corresponds to a bus protocol that notifies the transfer destination of the number of transfer data at the start of data transfer, for example, a PCI-X bus. Therefore, according to the embodiment of FIG. 1, it is possible to provide a reception data storage device and a reception data storage method with high transfer efficiency.
- the additional information data has the packet data number of the received packet data 8, but the additional information data is equivalent even if it has the priority of the received packet data 8. Therefore, an equivalent effect can be obtained.
- the additional information data has the packet data number of the received packet data 8. Even if the additional information data has the status information of the received packet data 8, it is equivalent. Therefore, the same effect can be obtained.
- the number of packet data of the received packet data 17 is configured to be added before the packet data # 0.
- the number of packet data is added other than before the packet data # 0. Even if it forms in this way, an equivalent effect can be obtained.
- the additional information data is accessed by one push or one pop to the ring memory 16! / ⁇ , but the ring memory is obtained by multiple pushes or multiple pops. Accessing 16 results in substantially the same configuration, so the same effect can be obtained.
- step S11 is executed in which the address of the write pointer becomes a value obtained by incrementing the address of the read pointer (address of the read permission pointer), and the initial state is set.
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Abstract
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-278600 | 2004-09-27 | ||
| JP2004278600A JP4465603B2 (ja) | 2004-09-27 | 2004-09-27 | 受信データ格納方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006035577A1 true WO2006035577A1 (ja) | 2006-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/016416 Ceased WO2006035577A1 (ja) | 2004-09-27 | 2005-09-07 | 受信データ格納装置及び受信データ格納方法 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4465603B2 (ja) |
| WO (1) | WO2006035577A1 (ja) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000134197A (ja) * | 1998-10-28 | 2000-05-12 | Fujitsu Ltd | 二重化装置間データ転送能力調整方法 |
| JP2002215567A (ja) * | 2001-01-16 | 2002-08-02 | Matsushita Electric Ind Co Ltd | Usb制御装置 |
-
2004
- 2004-09-27 JP JP2004278600A patent/JP4465603B2/ja not_active Expired - Fee Related
-
2005
- 2005-09-07 WO PCT/JP2005/016416 patent/WO2006035577A1/ja not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000134197A (ja) * | 1998-10-28 | 2000-05-12 | Fujitsu Ltd | 二重化装置間データ転送能力調整方法 |
| JP2002215567A (ja) * | 2001-01-16 | 2002-08-02 | Matsushita Electric Ind Co Ltd | Usb制御装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006094246A (ja) | 2006-04-06 |
| JP4465603B2 (ja) | 2010-05-19 |
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