JPS63146637A - Packet communication system - Google Patents

Abstract

PURPOSE:To provide an address to the combination of optional terminal equipments by providing plural control sections designated by a 2nd address section representing optional other combinations in a group applying communication. CONSTITUTION:In sending a packet having the 2nd address '10110101' designating destinations 2, 3 from a sender 1 in a way of multiple address, the packet is received respectively by the destinations 2, 3. For example, when a 1st address part of the packet is described with '10110001', the packet has one transmission control part and one reception control part, the transmission control part is received by the destinations 2, 3 and the reception control part is received by the destination 3 only. Normally, the reception control part includes response information to a packet sent from the destination 3. Moreover, when the 1st address part is described with '10110101' for example, the packet has two reception control parts, which are received by the destinations 2, 3 respectively and processed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a packet communication system, and in particular, the present invention relates to a packet communication system, in particular when multiple terminals are connected to one
This invention relates to a packet communication method in which two groups are formed and communicated.

[Conventional technology]

One form of communication is group communication in which data sent from one transmission source is simultaneously received by a plurality of stations. In a packet communication system in which data is divided into blocks and transmitted, it is necessary to assign a source and destination address to each packet. Conventionally, this is called a group address, and there is a method of assigning one logical number to all stations within a group. However, in group communication, there are many things that do not need to reach all stations in the group, such as response information to transmitted information and retransmission information in response to a failure at each station, so group communication using such address formats The data link control method has problems such as unreliable data transmission and reception processing and low transmission efficiency.

Figures 4 and 5 show conventional data links.
The first packet communication method based on the m method. The second example is block failure.

For example, as shown in FIG. 4, in a network in which three stations 51 to 53 are connected via one node 41, station 51 transmits transmission information to stations 52 and 53 using a group address.

When stations 52 and 53 send response information back to this address, it should normally reach only station 51, but if the same group address is used, it will also reach one station 53 or 52. , n times from the node 41 to the station 53 or 52, respectively, are wasted.

Furthermore, as shown in FIG. 5, in a broadcasting type transmission path where information transmitted from all stations 61 to 63 can be received by all other stations via broadcasting type network 71, the above case occurs. Although there is no wasteful use of the transmission line,
The receiving station has to process the reception of unreliable data, and the data has to include a part that newly specifies the receiving station, which creates a burden.〇 [Problems to be solved by the invention] In the conventional packet communication method described above, one group address is assigned to all terminals in a glue group, so there is a problem that useless information is received.

An object of the present invention is to provide a packet communication system capable of group communication that allows addresses to be assigned to any combination of terminals.

[Means for solving problems]

Packet communication method H of the present invention is a packet communication method in which the same data block divided into one segment is sent simultaneously to multiple destinations, in which each packet indicates a part indicating a group in which communication is to be performed and an arbitrary combination of stations within the group. a first address part consisting of a first address part consisting of a second address part indicating any other combination of stations in the group, and a plurality of addresses corresponding to the plurality of stations specified by this @2 address part. The controller includes a controller.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a diagram showing an example of the data format of a packet used in an embodiment of the packet communication system of the present invention.The data format ψ of the first address part in FIG.
FIG. 3 is a block diagram of a network showing an embodiment of the packet communication system of the present invention.

As shown in FIG.
A second address unit 13, a transmission control unit 2° that controls data errors, flows, orders, etc., and a plurality of receiving fpI suppression units 21, 22 . ~2N, and an information section 15.

The first address field 12 contains a data format as shown in FIG. That is, first address part 1:I4
The type code 121 consists of 8 bits, and the first 2 bits indicate whether it is a group address or not. For example, 110"
If so, it will be a group address. Next, there is a group address 122 which indicates a hack loop number from the 3rd bit to the 16th bit, and can specify 2 to 16384 independent groups.

Furthermore, the 17th and subsequent bits are the group address 123 that specifies each terminal in the group, and each bit corresponds to one terminal, and if this bit is "11", that terminal is the communication partner. ? Showing 0% by
As long as the number of terminals connected to one group is 32 or less, any combination of terminals can be realized.

one! In addition, by using only the intra-group address 1230 portion of the data format shown in FIG. 2 in the second address section 13, it is possible to designate the provision of control information to each wholesaler and multiplier partner.

By having such a packet of kumquats, the above-mentioned fourth
In the network shown in the figure, the node 41 can select the transmission path to which the data should be sent using only the address field. Furthermore, even in the network shown in FIG. 5, it is possible to discard received data by decoding only the address part.

Next, in Figure 3, the network includes source 1 and %include 1.
2.3', and has an address format of 38 bits each. The first 2 bits of this address format are a code similar to the type code 121 explained in Figure 2, and are a group address indicating the next 2-pit H group number, using the code "11". The last 4 bits are a code representing each terminal, and the sender 1 is ``1000''s.
"0100" and -00012 for destinations 2 and 3 respectively
First, when a packet with the second address @10110101'' that specifies destinations 2 and 3 from source 1 is sent in a circular manner, it is received by destinations 2 and 3, respectively. For example, if @″10110001′ is written in the first address part of .

This packet has one transmission control section and one reception control section, and this transmission control section is received at destinations 2 and 3, but
The reception control unit is received only by the transmission source 3. Normally, reception I
The JW portion includes response information for the packet sent from the destination 3. For example, @1 in the address part of @1
0110101”, this packet is 2
Wait for two reception control units and receive these! The +1# portion is then received and processed at the destination 2.3.

〔Effect of the invention〕

As explained above, the packet communication method of the present invention allows addresses to be specified for any combination of terminals, and by superimposing control information for packets from each terminal on separate packets, unnecessary This has the effect of realizing group communication that makes it possible to eliminate communication.

[Brief explanation of the drawing]

FIG. 1 shows an example of the data format of a packet used in an embodiment of the packet communication system of the present invention, FIG. 2 shows an example of the data format of the first address part in FIG. 1, and FIG. FIGS. 4 and 5 are network block diagrams showing one embodiment of the packet communication method of the present invention, respectively. 01 which is a block diagram showing a second example.
...Sender, 2, 3, old...Destination, 11...
...Delimiter part, 12...First address part, 13...Second address part, 15...
・Information Department %2o・Group・Transmission Control Department, 21.22. ~2
N... Injury control section. 41... Node, 51, ~53, 61. ~63
... Station, 71 ... Broadcast network, 121 ... Type code), 122 - Old group address, 123 - Address within group.

Claims (1)

[Claims] In a packet communication method in which the same data block is sent simultaneously to multiple destinations, each packet has a first address consisting of a part indicating the group in which communication is to be conducted and a part indicating an arbitrary combination of stations within the group. a second address section indicating any other combination of stations in the group, and a plurality of control sections corresponding to the plurality of stations specified by the second address section. A packet communication method that uses