JPS60121849A - Information communication network of internode coupling looped bus - Google Patents

Abstract

PURPOSE:To improve the reliability of the whole network and find trouble speedily by composing a bus of a looped bus and an opposite-directional additional bus, and extracting information from the additional bus and inserting information into the additional bus. CONSTITUTION:The communication network is put in operation by nodes (A00, A01...A0n) through the looped bus B0, and if trouble occurs in this system, the operation of the communication network is restarted by nodes (A10, A11...A1n) through the other system looped bus B1. When the trouble point is searched for, information is transferred from the transmission part S00 of the node A00 to the node A01 through the looped bus B0. When said information is detected normally, the transmission part S01 of the node A01 is connected to the additional bus C by an additional bus information inserting device E1, and the information is reported to the node A00. The node A00 receives the information from the additional bus C by an additional bus information extracting device D and a reception part R00 to detect whether the state of the node A01 is normal or not. Similarly, nodes (A02, A03...A0n) are checked to detect the position of the trouble in this system.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a loop-shaped path information communication network having a plurality of nodes, and more particularly to a loop-shaped path information communication network for a functional M-type multiprocessor system within a campus or the same building. .

[Prior art] In the configuration of an information communication network having a loop-shaped path, the communication control unit of each mate is connected in series to the loop-shaped path, so if the communication control unit of a certain node becomes a failure, the entire communication network will be affected. This caused problems in terms of system reliability.

To this end, the cables that make up the loop and the communication system 011 section of each no.I. I've been trying to improve. In addition, by reversing the transmission direction of the duplicated paths, a loopback function has been realized, which has helped to quickly detect failure points and speed up disconnection.

However, in systems where each node performs extremely important processing, such as a multi-microprocessor system with distributed functions, each node has a redundant configuration for reliability reasons. In the conventional loop path configuration, two paths are required for each mate in one system, and the entire system requires four sets of cables and inter-node communication control devices, which has the disadvantage of increasing the amount of hardware for the entire system. There is.

[Purpose] The present invention configures a path with a total of three trees: a path connecting the communication devices between the two nodes of each duplicated node, and a connecting path passing through each mate, and the signal transmission direction is as follows. The path and the access path are in opposite directions, and each node in the network is equipped with a loop path management function, so that the loop management node can extract information from the additional path, and the other nodes can insert information into the additional path. By making it possible to switch from the active node to the standby node in the event of a failure, not only improves the reliability of the entire network, but also allows the loop management notebook to be switched from one to another in the failure system. The purpose of the present invention is to provide an inter-node coupling loop information communication network that can satisfy a loopback function by intervening an additional path in information transmission between nodes, and can quickly discover failure points.

[Structure of the Invention] In order to achieve the above object, the present invention connects a plurality of nodes including an inter-node communication control unit having a receiving unit and a transmitting unit in a loop shape through respective paths, thereby creating a dual-layered system. wherein each corresponding node in each loop is provided with a loop management function, a receiving unit of the node having the loop management function is provided with an information extraction device, and a transmitting unit of a node other than the node having the loop management function. is equipped with an information insertion device, the information extraction device and the insertion device are coupled by a link path, and the transmission direction of the addition is opposite to the transmission direction of the loop path. do.

[Example] An example of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram of an embodiment of the present invention, with nodes (
Aoo, Aol, -, Aon and A10.

Au, .
.

ROI! ”, ROT], and RIO, Ru
, ・-, R1n) and the transmitter (S OO, S ol,
-, S on and S 10 , S 11 .

..., 51n).

In the figure, the nodes (Aoo, Aol, −, AO
1]) and notes (A10, A11, -, A
ln) are connected and duplicated by loop paths BO and B1, respectively, and node AoO and node A1
0 has a management function for each loop. Bo
.

The information transmission direction of B1 is the same. Mate (Ao.

Aot, -, Aon) and path BO, and node (A
o.

AOI, . . . , AIT+) and path B are operated as a working system and a backup system. Node (AOO, AOI
) has a device for extracting pass information, and the node (
Aot, At+), -, (Aon, Atn) are respectively bus information insertion devicesff\jEi,...
＋ E Press Tl. The information extracting device and the information inserting device El,..., ETI are connected by a bus C, and the transmission direction of the bus C is the path B.
o, which is the opposite direction to the transmission direction of B1.

In the configuration described in -, for example, a communication network is operated at the nodes (Aoo, AOI, -, Aon) via the loop path Bo, and if a failure occurs in this system,
Mate (A
oo, A11, =-, Aln), the operation of the communication network is started.

” The two failure systems, namely path BO, node (AOO,
AOl, . When the node A Of successfully detects the information, it connects the transmitter S Of of the additional path information insertion device E1 and the additional bus C,
Notify the information to Mate AOO. Node A (Xl) receives the information from this additional path C by the additional path information extraction device and the receiving unit ROO, and detects whether the state of node AOI is normal or abnormal. (AO2, AO3, . . . , A(9)) can be inspected to detect the location of the fault in this system.

[Effects] As explained below, the present invention has a loop-shaped path that is connected one tree at a time to the active system and the backup system of each of the duplicated 7-domain groups, and an additional path that passes through each node. By configuring a path system with a total of three paths, and adding a device that can insert information into the additional path and a device that can extract information from the additional path to form a loop communication network, the reliability of the entire network can be improved. This has the effect that the location of the fault can be quickly discovered, and that hardware costs are reduced compared to a system that uses two paths for each group of notebooks.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. Aoo, Aol, -, Aon. A10, All, -, Atn-Note Bo, B
,・・・・・・・・・・・・・・・Loop path C・・・・・・・・・・・・・・・H addition/< SuD ・・・・・・・・・・・・・・・Additional path information extraction device E, En・・・・・・・・・・・・・・・
. . . Additional path information insertion device 5(1), S 01 , .
... , 5O11゜S 10 , S 11 , ...
, 5iTl... Transmitting section of the inter-mate communication control device Roo, Rot, --.-, Ron. R10, R11,..., R111... Receiving section of inter-mate communication control device

Claims (1)

[Scope of Claims] A plurality of pairs of 7-modes including a communication control section between nodes having a receiving section and a transmitting section are combined into two loops by a pair of 7-hesses, and each loop is made redundant. If L, each of the two nodes having the loop management function is provided with a loop management function, and the receiving section of the two nodes having the loop management function is equipped with an information extraction device; A transmitter of another node is provided with an information insertion device, and the information extraction device and the insertion device are coupled by an addition/pass. The information communication network is an inter-node coupling loop path, wherein the transmission direction of the access path is opposite to the transmission direction of the pair of loop paths.