CN103067205A - Switchover method of receiver-transmitter (RT) and back-up RT using same address under same host management - Google Patents

Abstract

The invention provides a switchover method of a receiver-transmitter (RT) and a back-up RT using the same address under the same host management to remove an unnecessary RT and back-up RT (BRT) switchover problem caused by power failure of a bus controller (BC). The switchover method of the RT and the back-up RT using the same address under the same host management comprises that the BC broadcast periodically sends system time to enable all subsystems to work under the same reference time, the RT and the BRT can receive the system time sent by the BC broadcast, and subsystem main machines acquire the system time by calling a driving function. When the RT communicates abnormally, the subsystem main machines detect whether the BRT can normally receive the system time sent by the BC broadcast or not. If the BRT can normally receive the system time sent by the BC broadcast, the subsystem main machines execute switchover. If the BRT cannot normally receive the system time sent by the BC broadcast, the subsystem main machines do not execute switchover. According to the switchover method of the RT and the back-up RT using the same address under the same host management, the unnecessary RT and the BRT switchover problem caused by power failure of the BC can be effectively avoided, and normal work of the subsystems is guaranteed.

Description

Share the RT and backup RT changing method of same address under the same Host Administration

Technical field

The present invention relates to a kind of for the changing method of 1553B network medium-long range terminal (RT) with backup remote terminal (BRT).

Background technology

The RT equipment of important two redundancies of subsystem demands shares same RT address in the 1553B network, and backups each other.Behind a RT access network, another RT only has the receive data function, is in the Hot Spare state.Therefore, need to determine rational switching condition, only when the RT fault causes carrying out proper network communication, just switch, get rid of the unnecessary switching that other situations cause.

Summary of the invention

The invention provides the RT and backup RT changing method that share same address under the same Host Administration, to get rid of RT and the unnecessary switching problem of BRT that causes owing to bus control unit (BC) outage.

The scheme that the present invention solves the problems of the technologies described above is as follows:

Bus control unit (BC) the periodic broadcasting transmitting system time is worked all subsystems under the same reference time, RT and BRT all can receive the system time of BC broadcast transmission, and the subsystem main frame obtains described system time by calling driving function;

When the RT communication abnormality, can subsystem Host Detection BRT normally receive the system time of BC broadcast transmission;

If can, show that BC is in normal operating conditions and RT is unusual, then the subsystem main frame is carried out and switched: the subsystem main frame at first cuts out the RT sending function, opens the BRT sending function again, realizes the Hot Spare of RT and BRT;

If can not, show the equal communication abnormality of RT and BRT, namely be judged to be the BC caused by abnormal, then the subsystem main frame is not carried out switching.

The present invention has the following advantages:

The present invention utilize BC periodic broadcasting transmitting system to the time message and RT, BRT all can receive the characteristics of this message, by formulating rational switching condition, realize that fault RT is to the switching of BRT.The method can effectively avoid because the unnecessary switching problem of RT, BRT that electricity causes under the BC guarantees the subsystem normal operation.

Description of drawings

Fig. 1 is 1553B bus topolopy figure;

Fig. 2 is RT of the present invention, BRT switching flow figure.

Embodiment

1553B is two remaining bus type topological structures, and as shown in Figure 1, BC is responsible for communication and the management of whole network, and important subsystem is by RT and BRT access 1553B network, communicating by letter between the other system in realization and the network.

Under the normal operating conditions, RT be responsible for network in communicating by letter between the other system, BRT is in the Hot Spare state, only has the receive data function.

RT, BRT switching flow are specifically as shown in Figure 2.

The BC periodic broadcasting transmitting system time is worked all subsystems under the same reference time, RT and BRT all can receive the system time of BC broadcast transmission, and the subsystem main frame obtains system time by calling driving function.

During the RT communication abnormality, can subsystem Host Detection BRT normally receive BC broadcasting system time (T1 that can be by as shown in Figure 2 and T2 relatively judge), if BRT can normally receive the BC broadcasting system time, illustrate that BC is in normal operating conditions, RT is unusual, is carried out by host this moment to switch, during switching, host at first cuts out the RT sending function, opens the BRT sending function again, realizes the Hot Spare of RT and BRT.If BRT is the receiving system time normally, show the equal communication abnormality of RT and BRT, this fault may cause unusually for BC, so host is not carried out switching.

Claims (1)

1. share the RT and backup RT changing method of same address under the same Host Administration, comprise following link:

Bus control unit (BC) the periodic broadcasting transmitting system time is worked all subsystems under the same reference time, RT and BRT all can receive the system time of BC broadcast transmission, and the subsystem main frame obtains described system time by calling driving function;

When the RT communication abnormality, can subsystem Host Detection BRT normally receive the system time of BC broadcast transmission;

If can, show that BC is in normal operating conditions and RT is unusual, then the subsystem main frame is carried out and switched: the subsystem main frame at first cuts out the RT sending function, opens the BRT sending function again, realizes the Hot Spare of RT and BRT;

If can not, show the equal communication abnormality of RT and BRT, namely be judged to be the BC caused by abnormal, then the subsystem main frame is not carried out switching.

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