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* GPSS/PC Program File L1x.GPS. (V 2, # 37349)
* MODEL OF INFORMATION LINK
* Data transmission system with feedback
* Messages transfer with segmentation on standard packet
* Frame failures take place because of errors
* in forward and backward data link
X1 - message length;
X2 - standard segment (information packet) length
X3 - control packet length
X4 - probability of error per bit (x 1E-6)
X5 - propagation delay in channel
X6 - time-out of frame answerback
X7 - time of modeling
X8 - number of transmission frame
X9 - counter of transmission messages
X10 - counter of receive segment on destination point
X11 - counter of received data
X12 - number of next frame on destination point
X13 - counter of prepered segment
X14 - counter of received date in cycle
P1 - storage of start time for transmission message
P2 - number of segment in message
P3 - total number of segment in message
P4 - packet length
P5 - storage of start time for transmission frame
P6 - error flag (0 - error-free, 1 - error frame)
P7 - tipe of control frame (1 - RR, 0 - REJ)
P8 - frame number
P9 - frame transmission flag (0 - no, 1 - yes)
20 INITIAL X1,2000;message length
30 INITIAL X2,512;standard packet length
40 INITIAL X3,48;length of control packet
50 INITIAL X4,1000;probability of error
60 INITIAL X5,800;propagation delay
70 INITIAL X6,1500;time-out of answerback
75 INITIAL X7,100000;time of modeling
80 INITIAL X8,0
85 INITIAL X9,0
90 INITIAL X10,1
91 INITIAL X11,0
93 INITIAL X12,1
95 INITIAL X13,0
97 INITIAL X14,0
100 BUF1 STORAGE 3; buffer for window
110 BUF2 STORAGE 1
120 LKF VARIABLE X1@X2;length of non-standard packet
130 LKI VARIABLE X1/X2;number of standard packet
140 LKS VARIABLE X1/X2+1;number of packet
150 LKY VARIABLE P3-1;number of packet - 1
160 LKX VARIABLE X1/X2-1;number of copy
170 TKC1 VARIABLE P4+48; information frame length
180 TKC2 VARIABLE X3+48; control frame length
190 P_ER1 VARIABLE V$TKC1#X4/1000; probability of
200 P_ER2 VARIABLE V$TKC2#X4/1000; error per frame
HOM_R VARIABLE X12-1;acknowledge frame number
CYCLE VARIABLE (X2+48)+X5+(X3+48)+X5;stand.cycle
213 R_CICLE VARIABLE X14#100/V$CYCLE;relative rate
220 TIME TABLE MP5,0,300,20;frame delivery time
230 TIM_M TABLE MP1,0,4000,8;message delivery time
240 RATE TABLE V$R_CYCLE,0,10,10;relative rate
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| Список использованных источников | | | Скандинавские наемники на Руси (конец X - середина XI веков). |