Tender invited for Development of Train Collision Avoidance System

ISO 9001: 2008 Effective from 18.06.2012 RDSO/SPN/196/2012 Version 3.1.1
Document Title : Specification of Train Collision Avoidance System
Description & bit values for various fields of Packets
Field No. of bits Value Description
PKT_PRIORITY 1
0 High Priority Packet
1 Normal Priority Packet
PKT_TYPE 4
PKT_LENGTH 6 xxxxxx
FRAME_NUM 15
Signal Directorate RDSO/Lucknow Page 46 of 56
Annexure-VII
0000 Signalling information from Station / Interlocked LC Gate/ IBS
0001 General Descriptor Packet from Stationary unit
0010 Redirected from Loco - Regular
0011 Redirected from Loco - Emergency
0100 Start Ref to Loco for Train Length Measurement
0101 End Ref to Loco for Train Length Measurement
0111 - 1111 Reserved for future use
Packet Length in terms of "Long Words" i.e. " 4 bytes"
e.g. 011000 means 20 Long words i.e. 80 bytes
000 xxxxxxxxxxxx For time GPS IST Hours 00+, 01+, 02+, 03+
001 xxxxxxxxxxxx For time GPS IST Hours 04+, 05+, 06+, 07+
010 xxxxxxxxxxxx For time GPS IST Hours 08+, 09+, 10+, 11+
011 xxxxxxxxxxxx For time GPS IST Hours 12+, 13+, 14+, 15+
100 xxxxxxxxxxxx For time GPS IST Hours 16+, 17+, 18+, 19+
101 xxxxxxxxxxxx For time GPS IST Hours 20+, 21+, 22+, 23+
SOURCE_STN_ILC_IBS_ID 14 1x xxxxxxxxxxxx ID of Station / Int. LC Gate/ IBS transmitting the packet
SOURCE_STN_ILC_IBS_VERSION 8
Version Number of Station / Int. LC Gate/ IBS transmitting the
xxxxxxxx
packet
DEST_LOCO_CNT 7 xxx xxxx Info destined / aimed for these many Locos / Trains
DEST_LOCO_ID 14 0x xxxxxxxxxxxx ID of destined / aimed Loco / Train
0000 0000 Invalid / unidentified
CUR_SIG_ID 8 xxxxxxxx other than
0000 0000
ID of the Signal on approach