Design thinking of DMS structured data subscription

1 Background

This paper mainly describes the subscription problem between SSIP (signaling SCADA integration Platform) and DMS information. It mainly includes real-time database table definition, how to use protobuf structured data as the unit of subscription.

In SCADA real-time monitoring system, the graphical configuration can be based on the conventional analog and digital subscription mode. But we will also face such real-time structured data, the subscription needs as a whole, then what to do.

This article will use a DMS example to conceive of such a special subscription process. 2 DMS Structure definition

Serial number	Content	Number of bytes	Content Description
1	Frame type	1	0x07
2	ATP time	4	Unix Time
3	Server time	4	Unix Time
4	Locomotive number	2	Word type
5	Locomotive model	2	Word type
6	Trips	8	String display directly
7	Driver number	2	Word type
8	Deputy Driver number	2	Word type
9	Enter the road number	1
10	Actual intersection number	1
11	Station No.	2	Word type, Tmis, unified and unique across the road
12	Locomotive running Direction	1	1: Upstream 2: downlink
13	Common braking speed	2	Word type
14	Emergency braking speed	2