JPH08181715A - Transmitter-receiver - Google Patents

Abstract

PURPOSE: To provide a transmitter-receiver capable of efficient transmission and reception by extracting a packet at a rate according to a selection condition for each packet class. CONSTITUTION: This transmitter-receiver provided with a reception section 1 receiving a packet, a central processing unit section 6 in change of processing the packet received by the reception section, and a transmission section 7 sending a packet includes a packet analysis distribute section 2 discriminating a class of the packet received by the reception section and distribution the packet according to the class, plural class packet storage sections 3a-3h storing the distributed packet according to the class by the packet analysis distribution section and a selection section 5 deciding from which class packet storage sections a packet is to be extracted based on a prescribed selection condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission / reception device for transmitting / receiving packets on a network.

[0002]

2. Description of the Related Art In a conventional transmitter / receiver, a receiver receives a packet from a communication line, judges the priority of the packet,
A packet is stored in one of a plurality of packet storage units provided for each priority based on the priority determined by the judgment, the amount of received packets increases, and packet processing is delayed in time and congestion occurs in the packet storage unit. In this case, the central processing unit is configured to preferentially take out the received packet from the packet storage unit having a high priority and perform the packet processing.

[0003]

However, in the transmission / reception apparatus as described above, when the amount of received packets increases and packet processing cannot be completed in time and congestion occurs in the packet storage unit, the packet processing unit Since packets with higher priority stored in the packet storage with higher priority are sequentially extracted and processed, packets are cumulatively accumulated in the packet storage with lower priority unless congestion in the packet storage is eliminated. However, only the packet storage unit with a low priority causes the packet storage unit to overflow, and cumulatively accumulated packets are not processed.

When the congestion of the packet storage unit is resolved in a short time, even if the packet storage unit of low priority overflows, the packet priority is low because it is low, but Packets with low priority overflowing from the storage unit are repeatedly transmitted until they are processed, so it is necessary to process any packet with low priority. Therefore, if congestion in the packet storage unit is not resolved for a long time, if only high priority packets are processed until the congestion in the packet storage unit is resolved, low priority packets cannot be processed at all. A packet with a low frequency causes a large transmission delay, and a packet with a low priority is repeatedly transmitted until it is processed, so that there is a problem that the communication amount of the entire network increases and the network becomes congested.

The present invention has been made in order to solve the above problems, and an object of the present invention is to prevent a so-called low priority packet from causing a large transmission delay and to reduce a packet transmission error. It is an object of the present invention to provide a transmission / reception device which can efficiently perform transmission / reception without congestion of the network due to retransmission.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a receiver for receiving a packet and data processing of a packet received by the receiver. In a transmission / reception device having a central processing unit for performing a packet transmission and a transmission unit for transmitting a packet, a packet analysis distribution unit that determines the type of a packet received by the reception unit and distributes the packet according to the type, and the packet analysis distribution unit It is characterized by comprising a plurality of type packet storage units for storing packets to be distributed according to the above, and a selection unit for determining from which type packet storage unit a packet should be taken out based on a predetermined selection condition.

According to the second aspect of the invention, there are provided a receiving unit for receiving the packet, a central processing unit for processing data of the packet received by the receiving unit, and a transmitting unit for transmitting the packet. In the transmission / reception device having the packet analysis unit that determines the type of packet received by the reception unit, the packet information storage unit that stores the type determined by the packet analysis unit, and the packet that stores the packet received by the reception unit. It is characterized by comprising a storage unit and a packet determination unit that determines a packet to be processed based on predetermined selection conditions and packet information stored in the packet information storage unit.

[0008]

With the above configuration, in the invention according to claim 1, the packet analysis distribution unit determines the type of the packet received by the reception unit and distributes it according to the type, and a plurality of types of packet storage units are provided. The packet analysis distribution unit stores packets to be distributed according to the type, and the selection unit determines the type packet storage unit that extracts the packet based on a predetermined selection condition. Therefore, congestion occurs among multiple type packet storage units. It is possible to retrieve packets from the type packet storage unit at a rate according to the selection condition without being affected by.

According to the second aspect of the invention, the packet analysis unit determines the type of the packet received by the reception unit, and the packet information storage unit stores the information of the type determined by the packet analysis unit. The packet storage unit stores the packet received by the reception unit, and the packet determination unit determines the packet to be processed based on the predetermined selection condition and the packet type information stored in the packet information storage unit. Packets can be extracted for each type at a ratio according to the information of the type of the packet and the information of the type of the packet.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a transmitting / receiving apparatus according to the present invention will be described with reference to FIG. 1, and a second embodiment will be described with reference to FIG.

First Embodiment FIG. 1 shows a first embodiment of the present invention.
Will be explained. FIG. 1 is a block diagram of a transmission / reception device.

In FIG. 1, reference numeral 1 indicates a receiving section. The receiving unit 1 receives a packet from a communication line and outputs the received packet to the packet analysis / distribution unit 2.

The packet analysis / distribution unit 2 analyzes the address of the packet and the contents of the packet to determine the type of the packet, and the corresponding type packet storage unit 3 according to the type.
a to 3h.

In the present embodiment, the type of packet is "packet source" indicating from where it is transmitted, and "packet re-transmission" indicating whether it is necessary to generate a packet again by processing the packet. Occurrence "," packet continuity "when dividing into multiple packets due to large amount of transmitted / received data, and" allowable delay time "indicating when the packet should be processed. There is.

For example, in the transmitting / receiving apparatus shown in FIG. 1, the type is "packet transmitted from terminal A" (type A
1), "packet transmitted from terminal B" (type A
2), "Packet transmitted from terminal C" (type A
3), "Packet with packet reoccurrence" (Type B)
1), "packet with continuity" (type C1), "packet with allowable delay time of 20 seconds" (type D1), "packet with allowable delay time of 60 seconds" (type D2), "allowable delay time" A packet of 60 seconds or more ”(type D3).

The type packet storage units 3a to 3h are for storing the packets that the packet analysis / distribution unit 2 classifies and distributes according to the type, and is provided by the number of packet types and is stored in advance. Are taken out first, and those stored later are taken out later. The packet storage unit 3a is of type A1, the packet storage unit 3b is of type A2, the packet storage unit 3c is of type A3, the packet storage unit 3d is of type B1, the packet storage unit 3e is of type C1, and the packet storage unit 3f is of type D1. The unit 3g stores the type D2, and the packet storage unit 3h stores the type D3 packet.

The packet storage monitoring unit 4 monitors the storage condition of the packets in the packet storage units 3a to 3h, and the selection unit 5 determines how much storage capacity is used for each packet storage unit 3a to 3h. Output to.

The selection unit 5 determines the type packet storage units 3a to 3h from which packets are extracted based on the selection conditions.

The selection condition is determined in advance, and the time period, a specific time (when the system is started up, when the system is finished, etc.), the state of the storage capacity of the type packet storage units 3a to 3h, and the like are elements of the selection condition. Becomes

In the present embodiment, the selection conditions are as follows: [Condition 1] Only a type packet storage unit 3a corresponding to the type A1 "packet transmitted from terminal A" is selected for a predetermined time from system startup (terminal A). Is assumed to be the base unit, because it receives information for initialization from the base unit). For example, even when 10 packets are distributed and stored in each of the type packet storage units 3a to 3h, the type packet storage units 3b to 3h are not selected and only the type packet storage unit 3a is selected. Therefore, the 10 packets stored in the type packet storage unit 3a are preferentially processed. Therefore, since the information from the parent device (terminal A) required at the time of startup can be received and processed without leakage, the startup process can be performed quickly and reliably.

[Condition 2] Based on the information from the packet storage monitoring unit 4, if any of the type packet storage units 3a to 3h is in a congestion state, the ratio of selecting the type packet storage unit is increased, The ratio is maintained until the congestion state is resolved (increasing the ratio means, for example, that the selected packet storage units 3a to 3h are selected once in a certain cycle, and the selected packet storage unit 3a is selected three times. If the selection is made, it means that the type packet storage unit 3a selects twice more than the other type packet storage units).

[Condition 3] When the time zone is in the morning (8 am to 10 am), the type A2 "packet transmitted from the terminal B" and the type A3 corresponding to the "packet transmitted from the terminal B"
By increasing the selection rate of the type packet storage unit 3c corresponding to the "packet transmitted from the terminal C", the type A1 "packet transmitted from the terminal A" is selected at night (8 pm to 7 am). The rate of selecting the corresponding type packet storage unit 3a and the type B1 "packet with packet reoccurrence" type packet storage unit 3d is increased. During the night when the network is not congested, packet processing that preferentially extracts and processes packets that need to be processed during the morning hours and regenerates packets from specific terminals and loads the network This is to do it.

[Condition 4] The type packet storage unit 3e corresponding to the type C1 "packet with continuity" is selectable when all consecutive packets are stored in the type packet storage unit 3e. Then, once the type packet storage unit 3e is selected, the type packet storage unit 3e is continuously selected until all continuous packets are extracted.

[Condition 5] Selection is made at a rate satisfying the relation of type packet storage section 3f> type packet storage section 3g> type packet storage section 3h. Therefore, the type packet storage units 3a to 3h for extracting the packets are determined in consideration of all the conditions in a comprehensive manner.

The central processing unit 6 extracts one packet from the type packet storage units 3a to 3h determined by the selection unit 5 and performs a process corresponding to the extracted packet. The processing corresponding to the packet includes, for example, displaying the content instructed by the packet, calculating the content instructed by the packet,
This is, for example, generation of a new packet for sending.

When the central processing unit 6 creates a new packet, the sending unit 7 sends the packet to the communication line.

Next, the operation of the transmitter / receiver configured as above will be described. First, the receiving unit 1 receives a packet from the communication line and outputs it to the packet analysis / distribution unit 2,
The packet analysis / distribution unit 2 analyzes the address of the packet and the contents of the packet, determines the type of the packet, and outputs it to the corresponding type packet storage units 3a to 3h.

For example, when a packet is transmitted from the terminal A, the packet analysis / distribution unit 2 determines that it is of type A1 and outputs it to the type packet storage unit 3a. Next, when the packet is transmitted from the terminal B, the packet analysis distribution unit 2 determines that the packet is the type A2, and outputs it to the type packet storage unit 3b.

By repeating the above operation, the packet analysis / distribution unit 2 analyzes and judges the sequentially received packets and outputs them to the type packet storage units 3a to 3h corresponding to the type.

On the other hand, the selecting section 5 selects one type packet storage section from which the packet should be extracted from the type packet storage sections 3a to 3h based on the above selection conditions. For example,
When the transmission / reception apparatus is started up, the selection unit 5 selects only the type packet storage unit 3a according to the condition 1.

The central processing unit 6 takes out one packet from the type packet storage units 3a to 3h determined by the selection unit 5, processes the packet, and generates a packet to be sent if necessary. The packet is output to the transmitter 7, and the transmitter 7 sends the packet to the communication line. When the transceiver is started up as in the above example, the central processing unit 6 takes out the packet only from the type packet storage unit 3a and processes it. Therefore, the packet transmitted from terminal A is processed, but the packet transmitted from terminal B is not processed.

[Second Embodiment] A second embodiment of the present invention is shown in FIG.
Will be explained. FIG. 2 is a block diagram of the transmission / reception device.

In FIG. 2, reference numeral 1 indicates a receiving section. The receiving unit receives a packet from the communication line and outputs the received packet to the packet analysis / distribution unit 2.

The packet analysis unit 8 analyzes the address of the packet and the contents of the packet, determines the type of the packet, and assigns a serial number to the packet (the packet received first by activating the transmitting / receiving apparatus is "1"). ), And outputs the acceptance number and the type to the packet information storage unit 10. When one packet has a plurality of types, all types are output to the packet information storage unit 10. Note that the types are the same as those described in the first embodiment, so description will be omitted.

Further, the packet analysis section 8 outputs the packet itself together with the acceptance number to the packet storage section 9.

The packet storage unit 9 stores the acceptance number and the packet. Therefore, the packet stored in the packet storage unit 9 and the type of packet stored in the packet information storage unit 10 are associated with each other through the acceptance number given by the packet analysis unit 8.

The packet deciding unit 11 decides the acceptance number of the packet extracted from the packet storage unit 9 by the central processing unit 6 from the packet type information stored in the packet information storage unit 10 and the selection condition, and the acceptance number is decided. Is output to the central processing unit 6.

The selection condition is determined in advance, and the time zone, a specific time (when the system is started, etc.) are the elements of the selection condition.

In the present embodiment, the selection conditions are as follows: [Condition 1] When the system is started up, only the acceptance number corresponding to the type A1 packet is selected (the terminal A is assumed to be the master unit, and is used for initialization). It is for receiving information from the base unit).

[Condition 2] When the time zone is in the morning (8 am to 10 am), the ratio of selecting the reception number corresponding to the type A2 packet and the reception number corresponding to the type A3 packet is increased. Then, at night (8:00 pm to 7:00 am), the ratio of selecting the reception number corresponding to the type A1 packet and the reception number corresponding to the type B1 packet is increased.

[Condition 3] The acceptance number corresponding to the type C1 packet can be selected when all the consecutive packets are stored in the packet storage unit 9. Then, once the acceptance number corresponding to the type C1 packet is selected, the type C1 is continuously selected until all the acceptance numbers corresponding to the consecutive packets are selected.

[Condition 4] Type D1> Type D2> Type D
The acceptance number corresponding to the packet is selected at a rate satisfying the relationship of 3. Therefore, the acceptance number corresponding to the packet to be extracted is determined by comprehensively considering all the conditions.

The central processing unit 6 retrieves the packet corresponding to the acceptance number determined by the packet determining unit 11 from the packet storage unit 9 and performs the process according to the retrieved packet. The processing according to the packet includes, for example, displaying the content instructed by the packet, calculating the content instructed by the packet, and generating a new packet for transmission.

When the central processing unit 6 creates a new packet, the sending unit 7 sends the packet to the communication line.

Next, the operation of the transmitter / receiver configured as described above will be described. First, when the receiving unit 1 receives the packet transmitted from the terminal A, the receiving unit 1 outputs the packet to the packet analysis unit 8, and the packet analysis unit 8
The packet address and the packet contents are analyzed, the packet type is determined to be A1, and the packet is given a reception number "1" (because it is the first packet received by activating the transceiver). Then, the acceptance number “1” and the type A1 are output to the packet information storage unit 10.

Further, the packet analysis unit 8 outputs the reception number "1" and the packet itself to the packet storage unit 9, and the packet storage unit 9 stores the reception number "1" and the packet.

Next, when the receiving unit 1 receives continuous packets, the packet analysis unit 8 analyzes the packet address and the packet contents, determines that the packet type is C1, and A reception number "2", which is a serial number, is given to the packet information storage unit 10, and the reception number "2" and the type C1 are output to the packet information storage unit 10.

Further, the packet analysis unit 8 outputs the reception number "2" and the packet itself to the packet storage unit 9, and the packet storage unit 9 stores the reception number "2" and the packet.

By repeating the above operation, the packet analysis unit 8 analyzes the sequentially received packets, stores the type information in the packet information storage unit 10, and stores the packet itself in the packet storage unit 9.

On the other hand, the packet deciding unit 11 decides the acceptance number of the packet to be taken out based on the above selection conditions, and the central processing unit 6 takes out the packet corresponding to the acceptance number from the packet storage unit 9.

For example, at the time of start-up, the packet determination unit 11 extracts the acceptance number of the packet of type A1 from the packet information storage unit 10 according to the condition 1. In the above example, the packet with the acceptance number “1” was of type A1, so
The packet determination unit 11 outputs the acceptance number “1” to the central processing unit 6.

The central processing unit 6 takes out the packet corresponding to the acceptance number "1" from the packet storage unit 9 and performs the processing according to the packet. Then, if necessary by processing, a packet to be transmitted is generated and output to the transmission unit 7, and the transmission unit 7 transmits the packet to the communication line.

The type is not limited to the above-mentioned "packet transmission source", "packet reoccurrence", and the like. For example, "packet sender" indicating who sent the packet, Any attribute may be used as long as the attribute of the packet, such as “receiver of the packet” indicating who the packet is transmitted to.

In the first embodiment, the type A1 is stored in the type packet storage unit 3a, so that the type packet storage unit is provided corresponding to one type.
A type packet storage unit may be provided for storing packets having a plurality of types, such as storing packets of type 1 and type C1 in the type packet storage unit 3i. In this case, by setting a selection condition that designates a plurality of types at the same time, the packet can be retrieved from the type packet storage unit that matches the selection condition, so that transmission / reception can be performed more efficiently.

Further, in the first embodiment, the packets are distributed to the type packet storage units 3a to 3h for each type, but the number of types included in the packet is not necessarily one as described above, and may be plural. Therefore, the packet analysis / distribution unit 2 may perform distribution according to the number of types of packets.

The selection condition for selecting the type packet storage unit of the selection unit 5 in the first embodiment and the selection condition for selecting the packet of the packet determination unit 11 in the second embodiment are the same as those described in both embodiments. The present invention is not limited to this. For example, conditions such as conditions according to the date and time may be set in consideration of various factors such as time, and by weighting selection conditions, it is possible to optimize according to various factors according to various factors. Since various types of packet storage units or packets can be selected, more efficient transmission / reception can be performed. The selection condition for selecting a packet of the packet determination unit 11 in the second embodiment may be a selection condition for selecting a packet having a plurality of types. By providing such a selection condition, Packets can be selected under detailed selection conditions.

[0057]

Since the transmitting / receiving apparatus of the present invention is configured as described above, in the invention of claim 1, the packet analysis / distribution unit determines the type of packet received by the receiving unit and follows the type. The type packet storage unit stores the packets to be distributed by the packet analysis distribution unit for each packet type, and the selection unit determines the type packet storage unit to extract the packet based on a predetermined selection condition. Since packets are extracted at a rate according to the selection conditions for each type without being affected by the occurrence of congestion between each other, it is possible to improve efficiency by processing packets that meet conditions such as the time zone and the state of the type packet storage section. The present invention has the effect of providing a transmitting / receiving device that performs automatic transmission / reception.

According to the second aspect of the invention, the packet analysis section determines the type of packet received by the reception section,
The packet information storage unit stores information analyzed by the packet analysis unit, the packet storage unit stores packets received by the reception unit, and the packet determination unit stores predetermined selection conditions and packet information stored in the packet information storage unit. Since the packet to be processed is determined based on the above, there is an effect that it is possible to provide a transmission / reception device that performs efficient transmission / reception by processing a packet that meets conditions such as a time zone and a specific time.

[Brief description of drawings]

FIG. 1 is a block diagram of a transmission / reception device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a transmission / reception device according to a second embodiment of the present invention.

[Explanation of Codes] 1 Receiver 2 Packet Analysis Distributor 3a Type Packet Memory 3b Type Packet Memory 3c Type Packet Memory 3d Type Packet Memory 3e Type Packet Memory 3f Type Packet Memory 3g Type Packet Memory 3h Type Packet storage unit 5 Selection unit 6 Central processing unit 7 Transmission unit 8 Packet analysis unit 9 Packet storage unit 10 Packet information storage unit 11 Packet determination unit

Front page continuation (72) Inventor Koichi Okada 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (2)

[Claims] 1. A transmission / reception device comprising a receiving unit for receiving a packet, a central processing unit for processing a packet received by the receiving unit, and a transmitting unit for transmitting a packet,
A packet analysis distribution unit that determines the type of packet received by the reception unit and distributes the packet according to the type, a plurality of type packet storage units that stores packets distributed by the packet analysis distribution unit according to the type, and based on predetermined selection conditions A transmission / reception apparatus, comprising: a selection unit that determines from which type packet storage unit a packet should be extracted. 2. A transmission / reception device having a receiving unit for receiving a packet, a central processing unit for processing a packet received by the receiving unit, and a transmitting unit for transmitting a packet,
A packet analysis unit that determines the type of packet received by the receiving unit; a packet information storage unit that stores the type determined by the packet analysis unit; a packet storage unit that stores the packet received by the receiving unit; And a packet determination unit that determines a packet to be processed based on the packet selection information stored in the packet information storage unit.