JPS62258537A - Multiple address control system - Google Patents

Abstract

PURPOSE:To improve the transmission efficiency by separating a packet into a label definition packet including a grouped address group and an information packet including transferred information and applying separately the packet transmission processing. CONSTITUTION:The acquisition of a label representing a group of a multiple address destination address is requested from an outgoing terminal equipment 41 to a level provision section of an outgoing station 42. When the sending of the label definition packet is finished to all stations in a network in the station 42, the outgoing station 42 completes the address transfer phase to set the information transfer phase. The actual transmission of information is executed in the information transfer phase. When a packet kind decision section of each reception station 43 detects the arrival of an information packet, the label number in the information packet and the label number in a reference table of its own table are collated, the reception terminal equipment/station information of the said station is transferred to a distribution switch control section and the said information is transferred to each terminal equipment/ stations 44, 45 via a distribution switch.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a broadcast address control method for transmitting the same information to a plurality of terminals accommodated in a packet network. Improved redundant transfer of parts,
This article relates to a broadcast address control method that improves transmission efficiency.

[Conventional technology]

FIG. 6 shows a format for transferring m packets to n destinations in various conventional broadcast address control systems.

Conventionally, as in facsimile communication services, there was an individual transmission method in which the transmitting side (the transmitting terminal or the station that accommodates the terminal) had a storage function, and the same information was duplicated for the number of destinations, and each address was assigned and transferred. It was the Lord. This method is shown in FIG. 6(a).

[Problem that the invention seeks to solve]

However, in the above-mentioned method, although the header is small, the number of packets to be sent needs to be nXm, so there is a problem that it takes a long time to complete the transmission and requires a storage function. To solve this problem, it is possible to shorten the transmission completion time by not duplicating data on the transmitting side, but by making multiple connections at relay stations within the network.

For address setting in this case, a variable-length header method can be considered in which addresses are assigned with information for the number of destinations and transferred, but in this method, the number of packets to be sent can be 1 to m, but if there are many destinations, Another problem was that the header length was long and the overhead was large. This method is shown in FIG. 6(b).

The present invention has been made in view of the above circumstances, and its purpose is to solve the above-mentioned problems in the conventional broadcast address control system, shorten the transmission completion time, and avoid redundant transfer of headers. The purpose of this invention is to provide a broadcast address control system that improves transmission efficiency.

[Means for Solving the Problems] The above object of the present invention is to provide a broadcast address control method for broadcasting information from a terminal accommodated in a network to a plurality of other terminals in the network. A reference table for grouping addresses specifying destinations and associating group numbers (labels) corresponding to the grouped address groups at each station in the network, and grouping them in correspondence with the labels in the reference table. a write circuit that writes a group of addresses that have been grouped together; a read circuit that reads a group of addresses grouped based on the label from the reference table;
A table control unit that controls writing to and reading from the reference table, a packet type determination unit that determines the type of a received packet, and a labeling unit that applies the label to the transmitted packet are provided. This is achieved by a broadcast address control method characterized by separating an address transfer phase in which a group of addresses is written using a computer, and an information transfer phase in which actual communication information is transferred.

[Effect]

In the present invention, a plurality of destination address groups are grouped at a transmitting station that accommodates a transmitting terminal that requests broadcast communication, and a label representative of the address group is assigned to a transmitting packet by a label assigning unit of the transmitting station. A packet containing the grouped address group described above (hereinafter referred to as "label definition packet") and a packet containing information to be transferred (hereinafter referred to as "information packet")
The address transfer phase and the information transfer phase are set separately.

〔Example〕

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

FIG. 2 is a block diagram of a broadcast communication station showing an embodiment of the present invention. In the figure, 1 is a packet type determination unit that identifies whether an arriving packet is the label definition packet or an information packet, 2 is a selector that sorts between the label definition packet and the information packet, and 3 is a receiving terminal or a receiving terminal. 4 is a distribution switch control unit that controls the distribution switch 3, and 5 is a reference table control unit that controls writing and reading of a reference table, which will be described later. There is.

Further, 6 is a write circuit for writing the grouped address information of the label definition packet into a reference table to be described later, and 7 is the reference table (contents) for temporarily holding a group of addresses corresponding to defined label numbers. 8 is a readout circuit that reads out the address group held in the reference table 7; 9 is a labeling unit that adds a label to a transmission packet input from a transmitting terminal;
10 indicates a packet header generator.

FIGS. 3(a) and 3(b) are diagrams showing examples of field configurations of the label definition packet and information packet. Third
Figure (a) shows an example of the feed structure of label definition buckets 1 to 1, where 11 is the header portion thereof, and 12 is the address field. The header section 11 includes -membrane control information 11B
, a packet type display field 11A with label definition packet display (A), a label number field (L) II that specifies a label number instead of the address field
The address field 12, which corresponds to the data section, accommodates addresses to be grouped.

Further, FIG. 3(b) shows an example of the field structure of an information packet, where 13 is a header portion thereof, and 14 is an information field. The header section 13 includes -film control information 13
B, a packet type display field 13A in which an information packet display (I) is made, and a label number field (L) 13C in which a defined label number is displayed, and the information field 14 stores data to be transferred. Ru.

FIG. 4 shows an example of the structure of the reference table,
In this example, addresses of terminals accommodated in the terminal accommodation station are stored in correspondence with defined label numbers. In addition,
The area after label number (i + 1) is an unused area.

FIGS. 5(a) and 5(b) show m destinations for n destinations in this embodiment.
This shows a configuration example of a format for transferring packets, with FIG. 5(a) corresponding to the address transfer phase and FIG. 5(b) corresponding to the information transfer phase. As is clear from the figure, since the address transfer phase and the information transfer phase are each set individually, the number of packets to be sent is m+1.

FIG. 1 shows an overview of the operation of broadcast address control in this embodiment. In the figure, 41 is a transmitting terminal that has requested broadcast communication, 42 is a calling station that accommodates the transmitting terminal 41, and 43 is a transmitting station that accommodates the transmitting terminal 41. A destination station d□ is shown that accommodates terminals that are the targets of broadcast communication that are distributed and connected from the originating station 42 via a relay station or the like.

Also, 44.45 is the receiving terminal 1 that is the target of broadcast communication,
．． 12.7 is a group of addresses (here, t□, t2) accommodated in the local station corresponding to the defined label.

Figure 3 shows the reference table to be written.

The following is based on FIGS. 1 to 5 shown above.

The operation of broadcast communication in this embodiment will be explained.

When performing a new broadcast communication, the originating terminal 41 requests the labeling unit 9 of the originating station 42 that accommodates the originating terminal 41 to acquire a label representing the group of broadcast communication destination addresses. The labeling section 9 is connected to the reference table control section 5.
The reference table control unit 5 refers to the reference table 7 and assigns the empty label number to the label assigning unit 9.
to notify.

The labeling section 9 notifies the label number to the header creating section 10, and the header creating section 10 creates the header part (see FIG. 3(a)) based on the label number.

Together with the above group of addresses, a label definition packet is constructed. Further, the reference table control section 5 sets an address transfer phase at the same time as notifying the label number to the labeling section 9.

In the address transfer phase, the originating station sends the label definition packet configured above to all stations in the network.

In each station 43 that receives this, when the packet type determination unit 1 detects that the label definition packet has arrived, it requests the reference table control unit 5 to write a new address group corresponding to the label number in the label definition packet. Then, among the address groups in the received label definition packet, the addresses of the seven terminals accommodated in the local station are written in the reference table 7 together with the labels.

When the originating station 42 finishes transmitting the label definition packet to all stations in the network, the originating station 42 ends the address transfer phase and sets the information transfer phase.

In the information transfer phase, actual information transfer is performed. When sending out an information packet, the labeling section 9 notifies the header creation section 10 of a predefined label, and the information packet is sent out with the label attached (see FIG. 3(b)).

In each receiving station 43, when the packet type determination unit 1 detects that an information packet has arrived, the label number in the information packet is compared with the label number in the reference table 7 of the own station, and the distribution switch control unit 4 Then, the receiving terminal/station information at the station is transferred, and the above information is transferred to each of the seven terminal stations 44 and 45 via the distribution switch 3.

According to this embodiment, a conventional packet is separated into a label definition packet containing a grouped address group and an information packet containing information to be transferred, and the packet transmission process is separated into an address transfer phase and an information transfer phase. Therefore, when broadcasting information that has a large amount of information and requires the transfer of many packets, the label definition packet described above only needs to be transferred once for the information to be sent, resulting in efficient information transfer. This has the effect of making it possible.

In the above embodiment, in the address transfer phase, it is checked whether or not there is a terminal/station address accommodated in the local station in the received label definition packet, and the terminal/station address accommodated in the local station is checked. only if there is
This is written to the reference table 7, but if it is accepted that the reference table 7 becomes large, the above check can be omitted and all addresses in the received label definition packet are written to the reference table. Needless to say, it's a good thing.

〔Effect of the invention〕

As described above, according to the present invention, in a broadcast address control method for broadcasting information from a terminal accommodated in a network to a plurality of other terminals in the network, an address specifying a transfer destination is provided. groups, and each station in the network assigns a group number (
a reference table that holds the association of labels); a write circuit that writes a group of addresses grouped in correspondence with the labels into the reference table; a readout circuit that reads out a group of addresses grouped into a group of addresses; a table control unit that controls writing to and reading from the reference table; a packet type determination unit that determines the type of a received packet; Since the address transfer phase in which a group of addresses is written to the reference table b2 and the information transfer phase in which actual broadcast communication information is transferred are separated, transmission is completed. This has the remarkable effect of realizing a broadcast address control system that takes less time, improves redundant transfer of header sections, and increases transmission efficiency.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an overview of the operation of broadcast address control in an embodiment of the present invention, FIG. 2 is a block diagram of a broadcast communication station in accordance with an embodiment of the present invention, and FIG. 3(a) , (b) is a diagram showing an example of the field configuration of a label definition packet and an information packet, and FIG. 4 is a diagram showing an example of the configuration of a reference table.
FIGS. 5(a) and (b) are diagrams showing an example of the configuration of a transfer format in this embodiment, and FIGS. 6(a) and (b) are diagrams showing a transfer format in a conventional general broadcast address control system. It is a diagram. 1: Packet type determination section, 2: Selector, 3: Distribution switch, 4: Distribution switch control section, 5: Reference table control section, 6: Write circuit, 7: Reference table, 8: Read circuit, 9 Label adding section, 10: Packet header creation section,
11: Header section of label definition packet, 12: Same address field, 13: Header section of information packet, 14:
Same information field, 11A, 13A: Packet type display field, 11C913C label number field. 〈shiζ ゛heno; ○ 3rd figure Buddha +
110 ILA 1113(b)
13C
13,V 13BFigure 4Figure 5(・)A4. Good number. (b) Header Figure 6 (a) Number of addresses 1 - 5) and J to, dahe, da

Claims (1)

[Claims] (1) In a broadcast address control method that broadcasts information from a terminal accommodated in a network to multiple other terminals in the network, groups of addresses specifying transfer destinations are grouped,
a reference table for associating and holding group numbers (labels) corresponding to the grouped address groups in each station in the network, and a write circuit for writing the grouped address groups corresponding to the labels into the reference table; a readout circuit that reads out a group of addresses grouped based on the label from the reference table; a table control unit that controls writing to and reading from the reference table; and a packet type determination unit that determines the type of the received packet. and a labeling unit that adds the label to the transmitted packet, and separates an address transfer phase in which a group of addresses is written to the reference table and an information transfer phase in which actual broadcast communication information is transferred. A broadcast address control method characterized by the following.