JPS59181846A - Receiving control system in loop network - Google Patents

Abstract

PURPOSE:To attain smooth communication by abolishing a signal transmitted from a synchronizing station in advance at a receiving side if the signal interferes with a transmitted signal in a loop transmission system comprising one synchronizing station and plural node stations. CONSTITUTION:The loop network is constituted with a clock station 7 and the node stations 1-6 so as to allow the station 7 to trnsmit a synchronizing signal to a loop 8 in a prescribed period. An interface section of the stations 1-6 is provided with a signal detecting circuit 14, a control circuit 13, a timer 17 and a receiving buffer 15 or the like, and the circuit 14 detects a destination address and a synchronizing signal or the like so as to reset the time 17 by using them. When the destination address detected by the circuit 14 is coincident with the own address, the circuit 13 starts a buffer 15 so as to receive a signal addressed to itself. When the timer 17 outputs a value larger than the predetermined time (difference between the period of the synchronizing signal and a propagation time) before the end of the reception of this signal block, the circuit 13 abolishes the signal block in the buffer 15.

Description

DETAILED DESCRIPTION OF THE INVENTION A clock station is composed of one clock station and a plurality of 45 node stations. The engineering is based on the patent application number 1983-212364
There is a ``loop-type iΦ communication system'', but in this network, 411# is transmitted from the clock station
Communication within the cycle is interrupted due to i” 1st term. In other words,
The signal from the node station is interfered with by the synchronization signal during loop propagation, and there are cases in which the signal does not come back after going around to the originating node station. In such a case, the originating node station will check whether the interfered signal block was correctly received at the destination node station before the interference occurred, or whether the signal flock that received the interference will be sent to the destination node station from the button that caused the interference. There is a problem in that it is not known whether it is necessary to carry out lifting control because the cargo has not arrived.

The present invention is to enable the originating mate station to determine that this signal block was not always received at the destination mate station when a signal block is interfered with by the same signal. .

In the inventive loop network reception 1h control method, one clock station is connected to a loop network consisting of two node stations, and the first clock station sends a synchronizing signal to the loop at a constant cycle. The mate stations each have a timer that operates based on the PI signal, and when the door timer becomes constant (to 1 to 1 or more), the signal block addressed to it is received (?i). TaJ
r/! 1 match or if it is received, the above i τ, →)
Furonokukego g-fro.

Next, the present invention will be described in detail with reference to the drawings. +h formation of the loop network of ``The 11th ring did not fire''
',; I(shishi) 2 is the fire of uninventiveness. In the 9th example, the signal clock in J4j is ''IIb, t(shown. The first loop network is the node station controller 1, 2. 3
, 4, 5. 6 and clock station 7)
+ (N h
, te(・ru. FIG. 2(a) shows a signal block sent out by the clock station 7, in which the preamble P R ,
Jl start flag SF, synchronous pinot) SY.

Indicates normal/1g mode. e completion flag EF
It is composed of. Figure 2, et al.) is the nodester John li, (1 communication is π week 71 tsuk, and the figure (a)
In addition to the structure of , the destination address D) ~, the originating address SA information field INFO, and the frame check sequence FCS are added.

IM! of the loop 8 at the output terminal of the clock station 7 shown in FIG. 3(a). (b), (
Input of node station 4 shown in c);
) Honjitsu will specifically explain 11 examples using the signal diagram of the loop 8 at the input terminal of the node station 50 shown as f.

As shown in FIG. 3(a), the clock station 7 sends out a synchronizing signal F to the loop 8 at a constant period T0.

] Signal F is 41. shown in the second figure (a). Bin) SY-1, focus MC=1. Bit SY = 1 indicates synchronization (A No. j; Indicates the mode of IJI trace 1a.

Therefore, synchronization) lXL i? i's sending message 1, the node station that is jealous of the victim, this θ) Jjx joint node stations 1 and 2 are the same [1j
, and send out the numbered flocks B and -B, respectively. At the same time, node station controllers 4 and 5 have 3 units! (b),
As shown in (d), synchronous A, No. F, (No.) Q, B1. B2 is supplied. The signal clocks B1 and B2 are
Human sy=o and bin 1Mc=1.

Ripstick station controller 7. As shown in Figure 3 (a), after passing through the bags of Den (Mitsuru, Takumi Shizuma, and Takumi Shizuma), the Dosukeshin 7th F was removed from Loop 8 and 1! It acquires the good 1 and sends out the 1 Riga number M.The trigger (i; jealousy M is bit SY=(:l, and the bit MC=0, indicating the mode of non-identical 91 communication. , −1・mo and the same j removed from loop 8
υifj No. F and Torigai No. 11 M +7) Ii-!
The i-open interval is indicated by break M11.

Suppose that node station 4 now issues a request for edge 5 addressed to node station 5 in the asynchronous communication mode. E
31MI (as shown in el), the node station controller 4 acquires the trigger signal M and the signal block B of the signal block B from the node station 3, and transmits the signal block B4.
Sends. , Furthermore, the bits SY and MC of the signal 70xBx and B4 are the same as the trigger <==, @y>, and both K
O is node station 5.)43[n1i
As shown in d+, the signal flock B4 is correctly received (M) without interference with the synchronization signal F, but the signal flock B4
4 was received at time 747τ from Tijd period T0. If the collection does not end before the time minus , the received flock No. 46 B4 will be discarded. Now, τ. -T. How time τ.

If node station 5 is abandoned, it will always be interfered with by No. J, No. 4, and No. 4 F, as shown in (No. G's flock is No. 31). The interfered signal flocs are denoted by B:. 4 symbol flock 84' is 3rd r; u
Node station 4Vcl is supplied as shown at b+. Node Stersion 4 receives interference from block R, so even if the destination node stage 7 is not affected by the synchronization signal Fil'c interference, the destination node stage controller will not be able to do so. Because it's a stone that traps you! Judging that the yellow state of υ trust has ended, for example, you can perform a 1 transfer ■ ・IJ operation.

FIG. 4 shows the loop ink face portion of the actual print 11. The loop ink face part in FIG. 4 is in contact with the loop 8. The output has the input number 10, the output number (1, ÷ child 11, and the buffer 1
2, lf, “i jKj・1−・1′I!−:13.1
Iris detection 1iNi path 14, reception buffer 15, timer 1
7. Transmission or interrogation from sofa 18 and swing-30
k has been done. The signal detection circuit 14 detects the Brian full PR, [+M flag SF, hit SY, to 4C' end flag, destination address 1] A1 issued atons SA of the signal block on the loop 8 supplied from the buffer 12. Then, the timer 17 is reset by 5Y=1, and the rest of the detected vagina is turned off by the full'i candy circuit 1.
Supply to 3. In the receiving part, the candy circuit 13 switches the switch 30 to the roof 811' by the control code 131.
The coded flock from the upstream of the loop 8 supplied to the input terminal 10 is sent to the output terminal 11. Id
The number detection circuit 14 detected the destination 7, L, S, I) A's own 7 dress and some stone, jii, 1, ;Circuit 1: (receives), wakes up the sofa 15. Receive a coded flock addressed to you. When the reception of the No. 5 book is completed, if 17 outputs a value larger than ('1゛.-τ0), fTi: control 1r! circuit 13 The signal goes back.

In the above, we have explained the case where τ, =,T, and the time τ is calculated by adding the margin time to the time τ0 so that To>τ.
. You may decide. This platform is located at the 4th ν1 mate station, and when the timer]7 outputs a value larger than (To-τ,), the air control circuit]3 is in the receiving 4H buffer 1.
At the same time, the switch 30 is turned on to the side of the buffer 18 to block the signal flock from the buffer 12 from being sent to the output terminal 11. Therefore, in the receiving side's 7-dostesimin, the discarded message block &1 example l"i period A2.;
INFO or F CS even without -F interrogation of issue F.
The transmitting node can know that the communication has just ended when σ is partially destroyed.

FIG. 5 shows another example of the 4-sensor 1-7 pin used for inter-node communication and interface-to-ji3 communication in this example. No. 7 μ ivy in Figure 5 and A is u, and the number 7μ in Figure 2 (e) is Nominobu John of the frame: 2 + 5, and the output of timer 17 is J.
When 'fi'L is smaller than (T, -τ0), own da 1j
Flock's Kutomi Sif, the believer of Frock;
1. + circuit 13 is 7, in transmission 0. %Sentukaha Sofa 1
Turn on the 8 side and set the normal muntin to 77 < 14 knees l”r to 43
Enter No. 1 70 Tsuku's F'C.

Then, when the output value of the timer 17 is greater than (To-τ.), when the reception 4j is completed, the number 15 in the reception buffer 15 is changed. Kita' with Otsu and J77 Shinronku with Zonozuma 15 1.1 and 7 FG has nothing to do with it. Therefore, during the period (when the sending node station (・ sentence, the sent out signal block is fH 1id) (even if the signal block sent out is fH 1id)
Since No. 41, which indicates the end of the first round, is not inserted into S, it is possible to know y[ at the node station on the receiving side.

In this way, according to misfire 1, even if the image reception '(tt' + 'two toss dusion successfully receives E 7 f:27, it interferes with the synchronization signal F while it goes around the loop. Since the received modifier flock is the first one to be discarded, the transmission I6]-tostigeon goes around the loop, and its own 1≧mail7 which is received is the lff1i given lff1i. ?Due to the interference of Dan F, this S-transfer has ended abnormally: Is it possible for Z to make a smooth process by squeezing B7?

However, according to the present invention, if the reception is A', the 1 node station normally transmits 2 signals, and the 70 signals sent through the loop are synchronized regardless of whether they are affected by the interference of A or not. It is not necessary to make an accurate judgment; it is possible to make a signal flock that has been sent to a foreign court, and to notify the 1.4 node station controller that the signal has been discontinued. Therefore, it is possible to create a smooth service Wm without knowing the loop-dependent delay time (−1k).

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the loop network of Hon Hikari.
;-(Showing !tJzo of ri issue 70) N1, No. 31
:d is the signal part on the loop that can be originally passed/example -, the 4th L
The phrase shows the loop/runtaface part of the two-toss version 1! -Flock diagram, FIG. 5 shows another configuration 7 of the signal block. In the figure, 1.2.3.4.5.6. is node station 7 beam "Jnoxfusion, 8 is node 1-b,
12°+5. l Banopua to S, 13 Shima control; circuit, 14i Yoshu” issue F5t13t, l-), 1 D:
:1.17 indicates timer. Daigonin Budanai Hara Susumu No. 1 Kasumi No. 2 Ward No. 3 Figure + τIH - 0 Hi No. Q Figure No. 5

Claims (1)

[Claims] 4゛i! from one network station and multiple node stations! In a loop network where one station sends a synchronization signal to the loop at a constant frequency υ1, the previous H114 node station is
Each has a timer that operates in synchronization with the synchronization signal, and when the timer exceeds a certain value, the signal block addressed to the user is received or the received message block is sent to the INN. , m. A reception fli'j control method in a loop network.