CN113114542A - Method and system for monitoring running state of satellite communication system based on IP response - Google Patents

Method and system for monitoring running state of satellite communication system based on IP response Download PDF

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CN113114542A
CN113114542A CN202110660112.XA CN202110660112A CN113114542A CN 113114542 A CN113114542 A CN 113114542A CN 202110660112 A CN202110660112 A CN 202110660112A CN 113114542 A CN113114542 A CN 113114542A
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response
satellite communication
communication system
server
time
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CN113114542B (en
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李江华
齐东元
史焱
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Kairui Xingtong Information Technology Nanjing Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0852—Delays
    • H04L43/0864—Round trip delays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning

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Abstract

The invention discloses a method and a system for monitoring the running state of a satellite communication system based on IP response, relates to the technical field of satellite communication, and aims to solve the problems that in the prior art, the satellite communication network is low in manual operation and maintenance efficiency and lack of real-time performance, and long-time normal work of the communication system is difficult to guarantee. The technical scheme is characterized by comprising the following steps: performing active IP message response test on each node device or server of the satellite communication system; recording the response test result of the active IP message in real time, and judging and analyzing the network state of the node equipment or the server based on the test result; and automatically maintaining the network according to the network state judgment result. The invention improves the running reliability of the node equipment and the server, and effectively solves the problem of low efficiency of network quality caused by long-time running of the satellite communication system.

Description

Method and system for monitoring running state of satellite communication system based on IP response
Technical Field
The invention relates to the technical field of satellite communication, in particular to a method and a system for monitoring the running state of a satellite communication system based on IP response.
Background
China belongs to a country with multiple natural disasters, the territory area of China is large, and the occurrence uncertainty of the disasters is high, related units and personnel have high randomness in time and space when taking part in emergency rescue and disaster relief actions, satellite communication is not limited by regions and ground network operator base stations, communication quality is not affected by serious natural disasters such as earthquakes, and the emergency communication mode becomes important. When a major disaster is faced, in order to meet the communication requirements of high frequency and randomness, the communication reliability of the command center becomes a short board for major disaster rescue command.
At present, most networks based on satellite communication on the market need daily operation and maintenance inspection of maintenance personnel of a central station, real-time monitoring cannot be achieved, sudden equipment faults or server abnormal conditions cannot be dealt with, and the fact that the whole communication network is in a normal working state constantly to deal with sudden centralized communication command requirements cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a method and a system for monitoring the running state of a satellite communication system based on IP response, which greatly improve the running reliability of node equipment and a server and effectively solve the problem of low efficiency of network quality caused by long-time running of the satellite communication system.
The above object of the present invention is achieved by the following technical solutions:
a satellite communication system operation state monitoring method based on IP response comprises the following steps:
performing active IP message response test on each node device or server of the satellite communication system;
recording the response test result of the active IP message in real time, and judging and analyzing the network state of the node equipment or the server based on the test result;
and automatically maintaining the network according to the network state judgment result.
The invention is further configured to: the active IP message response test for each node device or server of the satellite communication system comprises the following steps:
sending a detection message frame to node equipment or a server in the satellite communication system in a broadcast or multicast mode through a UDP protocol;
and receiving and analyzing a response message frame sent by the node equipment or the server in response to the detection message frame, and finishing the active discovery action of the node equipment or the server.
The invention is further configured to: the real-time recording of the response test result of the active IP message and the judgment and analysis of the network state of the node based on the test result comprise the following steps:
recording the time of sending the probe message frame as
Figure 358060DEST_PATH_IMAGE001
Recording the time of the response message frame sent by the receiving node equipment or the server in response to the detection message frame as
Figure 805090DEST_PATH_IMAGE002
Calculating the response time of the message as
Figure 352746DEST_PATH_IMAGE003
；
Repeating m times to send detection message frame and receive response message frame, calculating the corresponding time of message response, forming response time sequence containing m real-value variables
Figure 319565DEST_PATH_IMAGE004
；
According to the response time sequence
Figure 294474DEST_PATH_IMAGE005
And ideal time sequence
Figure 228801DEST_PATH_IMAGE006
Computing a similarity function
Figure 580148DEST_PATH_IMAGE007
For a given threshold
Figure 401474DEST_PATH_IMAGE008
When is coming into contact with
Figure 812863DEST_PATH_IMAGE009
When the satellite communication system is in the normal working state, judging that the current satellite communication system is in the normal working state, otherwise, judging that the current satellite communication system is in the abnormal working state; wherein the ideal time series
Figure 968907DEST_PATH_IMAGE010
Represents a time sequence obtained by repeating m times of sending a detection message frame and receiving a response message frame and respectively calculating the response time of a message in an initial state of the satellite communication system,
Figure 655103DEST_PATH_IMAGE011
。
the invention is further configured to: the similarity function
Figure 596515DEST_PATH_IMAGE007
The calculation process of (2) is as follows:
by
Figure 647647DEST_PATH_IMAGE005
And
Figure 41719DEST_PATH_IMAGE006
construct a
Figure 975348DEST_PATH_IMAGE012
The similarity difference matrix of (1)
Figure 568003DEST_PATH_IMAGE013
The element is
Figure 321195DEST_PATH_IMAGE005
And
Figure 202564DEST_PATH_IMAGE006
difference between two time points
Figure 168246DEST_PATH_IMAGE014
Wherein i and j are integer count values;
establishing a difference increasing sequence in the similarity difference matrix
Figure 67937DEST_PATH_IMAGE015
Where k and p are both integer counts less than or equal to m, then
Figure 788769DEST_PATH_IMAGE016
And satisfy
Figure 157433DEST_PATH_IMAGE017
；
Calculating the number array mean value E of the arithmetic increment number array S, wherein the calculation formula is as follows:
Figure 192385DEST_PATH_IMAGE018
the similarity difference matrix can establish a plurality of difference incremental number rows S, and the number row mean value of each equal difference incremental number row S forms a mean value number row
Figure 431737DEST_PATH_IMAGE019
The similarity function
Figure 775999DEST_PATH_IMAGE007
Expressed as the minimum in the array of averaged numbers, i.e.:
Figure 631960DEST_PATH_IMAGE020
Figure 1761DEST_PATH_IMAGE007
the smaller, the
Figure 626778DEST_PATH_IMAGE005
And
Figure 627095DEST_PATH_IMAGE006
the greater the similarity.
The invention is further configured to: the automatic network maintenance according to the network state judgment result comprises the following steps:
sending an automatic memory sorting command to node equipment or a server;
updating and carrying out network state judgment analysis on the node equipment or the server;
if the network state judgment result shows that the work is abnormal, an automatic restart command is sent;
judging and analyzing the network state of the node equipment or the server again after the restart is finished;
and if the network state judgment result shows that the work is abnormal, an abnormal alarm is sent out, and the backup equipment or the server is replaced at the same time.
The second aim of the invention is realized by the following technical scheme:
a satellite communication system running state monitoring system based on IP response comprises an IP response server which is communicated with a plurality of node devices or servers in the satellite communication system, wherein the IP response server comprises:
the message testing module is used for carrying out active IP message response testing on each node device or server of the satellite communication system;
the state monitoring module is used for recording the response test result of the active IP message in real time and judging and analyzing the network state of the node equipment or the server based on the test result;
and the network maintenance module is used for restarting or starting the backup node equipment or the server.
The invention is further configured to: the message testing module sends a detection message frame to node equipment or a server in the satellite communication system in a broadcast or multicast mode through a UDP protocol;
and the message testing module receives and analyzes a response message frame sent by the node equipment or the server in response to the detection message frame, and completes the active discovery action of the node equipment or the server.
The invention is further configured to: the state monitoring module records the time for sending the detection message frame as
Figure 954040DEST_PATH_IMAGE001
Setting the receiving node atThe time of the response message frame sent by the standby or server in response to the detection message frame is recorded as
Figure 596374DEST_PATH_IMAGE002
Calculating the response time of the message as
Figure 872634DEST_PATH_IMAGE003
；
Respectively calculating the corresponding time of message response corresponding to the repeated m times of sending the detection message frame and receiving the response message frame to form a response time sequence containing m real-value variables
Figure 309432DEST_PATH_IMAGE004
；
According to response time sequence
Figure 874405DEST_PATH_IMAGE005
And ideal time sequence
Figure 775890DEST_PATH_IMAGE006
Computing a similarity function
Figure 375498DEST_PATH_IMAGE007
For a given threshold
Figure 983197DEST_PATH_IMAGE008
When is coming into contact with
Figure 35467DEST_PATH_IMAGE009
When the satellite communication system is in the normal working state, judging that the current satellite communication system is in the normal working state, otherwise, judging that the current satellite communication system is in the abnormal working state; wherein the ideal time series
Figure 550762DEST_PATH_IMAGE006
Represents a time sequence obtained by repeating m times of sending a detection message frame and receiving a response message frame and respectively calculating the response time of a message in an initial state of the satellite communication system,
Figure 254144DEST_PATH_IMAGE011
。
in conclusion, the beneficial technical effects of the invention are as follows:
the invention discloses a method and a system for monitoring the running state of a satellite communication system based on IP response, which automatically complete the maintenance of node equipment or a server by actively discovering and monitoring the node equipment and the server in a total station and according to the monitoring condition. The invention can realize the real-time monitoring of the states of the node equipment and the server, automatically monitor and switch faults, greatly improve the running reliability of the node equipment and the server, and effectively solve the problem of low data communication efficiency of the system in long-term running.
Drawings
FIG. 1 is an overall flow chart of a first embodiment of the present invention;
fig. 2 is an overall structural block diagram of the second embodiment of the present invention.
Detailed Description
Example one
Referring to fig. 1, the invention discloses a method for monitoring the operating state of a satellite communication system based on IP response, which comprises the following steps:
s1, performing active IP message response test on each node device or server of the satellite communication system;
and S2, recording the response test result of the active IP message in real time, and judging and analyzing the network state of the node equipment or the server based on the test result.
And S3, automatically maintaining the network according to the judgment result of the network state.
Wherein, step S1 specifically includes the following steps:
s11, sending a detection message frame to each node device or server in the satellite communication system through a narrow-band control channel in a broadcast or multicast mode through a UDP protocol;
and S12, the receiving node device or the server responds to the response message frame sent by the detection message frame and analyzes the response message frame, and the active discovery action of the node device or the server is completed.
Step S2 specifically includes the following steps:
s21, converting the result obtained in the step S12The time of sending the probe message frame is recorded as
Figure 767165DEST_PATH_IMAGE001
Recording the time of the response message frame sent by the receiving node device or the server in response to the detection message frame
Figure 306731DEST_PATH_IMAGE002
Calculating the response time of the message as
Figure 828979DEST_PATH_IMAGE003
；
S22, repeating the steps S1 and S21 m times to form a response time sequence containing m real-valued variables
Figure 934339DEST_PATH_IMAGE004
；
S23, according to the response time sequence
Figure 133108DEST_PATH_IMAGE005
And ideal time sequence
Figure 628811DEST_PATH_IMAGE006
Computing a similarity function
Figure 954750DEST_PATH_IMAGE007
For a given threshold
Figure 117878DEST_PATH_IMAGE008
When is coming into contact with
Figure 35019DEST_PATH_IMAGE009
And when the satellite communication system is in the normal working state, judging that the current satellite communication system is in the normal working state, otherwise, judging that the working state is abnormal. Ideal time sequence
Figure 798444DEST_PATH_IMAGE006
Which represents that the satellite communication system is in the initial state, the time series obtained by the step S21 is repeated m times,
Figure 662495DEST_PATH_IMAGE011
。
wherein the similarity function
Figure 414550DEST_PATH_IMAGE007
The calculation process of (2) is as follows:
by
Figure 971434DEST_PATH_IMAGE005
And
Figure 959506DEST_PATH_IMAGE006
construct a
Figure 158406DEST_PATH_IMAGE012
The similarity difference matrix of (1)
Figure 296126DEST_PATH_IMAGE012
The element is
Figure 23911DEST_PATH_IMAGE005
And
Figure 715923DEST_PATH_IMAGE006
difference between two time points
Figure 436623DEST_PATH_IMAGE014
Wherein i and j are integer count values. Establishing a difference increasing sequence in the similarity difference matrix
Figure 428850DEST_PATH_IMAGE015
Where k and p are both integer counts less than or equal to m, then
Figure 858694DEST_PATH_IMAGE016
And satisfy
Figure 569161DEST_PATH_IMAGE017
。
Calculating the number array mean value E of the arithmetic progression number array S, wherein the calculation formula is as follows:
Figure 578706DEST_PATH_IMAGE021
the similarity difference matrix can establish a plurality of difference incremental number rows S, and the number row mean value of each equal difference incremental number row S forms a mean value number row
Figure 409127DEST_PATH_IMAGE019
Similarity function
Figure 478715DEST_PATH_IMAGE007
Expressed as the minimum in the array of averaged numbers, i.e.:
Figure 207636DEST_PATH_IMAGE020
Figure 20871DEST_PATH_IMAGE007
the smaller, the
Figure 987690DEST_PATH_IMAGE005
And
Figure 946288DEST_PATH_IMAGE006
the greater the similarity.
Step S3 specifically includes the following steps:
sending an automatic memory sorting command to node equipment or a server;
updating and carrying out network state judgment analysis on the node equipment or the server;
if the network state judgment result shows that the work is abnormal, an automatic restart command is sent;
judging and analyzing the network state of the node equipment or the server again after the restart is finished;
and if the network state judgment result shows that the work is abnormal, an abnormal alarm is sent out, and the backup equipment or the server is replaced at the same time.
Example two
Referring to fig. 2, the invention discloses a satellite communication system running state monitoring system based on IP response, which comprises an IP response server communicated with a plurality of node devices or servers in the satellite communication system, wherein the IP response server comprises a message testing module, a state monitoring module and a network maintenance module.
The message testing module is used for performing active IP message response testing on each node device or server of the satellite communication system. Specifically, the message testing module sends a probe message frame to a node device or a server in the satellite communication system in a broadcast or multicast mode through a UDP protocol, and receives and analyzes a response message frame sent by the node device or the server in response to the probe message frame, thereby completing an active discovery action of the node device or the server.
And the state monitoring module is used for recording the response test result of the active IP message in real time and judging and analyzing the network state of the node equipment or the server based on the test result. Specifically, the time of sending the probe message frame is recorded as
Figure 631347DEST_PATH_IMAGE001
Recording the time of the response message frame sent by the receiving node device or the server in response to the detection message frame
Figure 982694DEST_PATH_IMAGE001
Calculating the response time of the message as
Figure 600757DEST_PATH_IMAGE003
；
Respectively calculating the corresponding time of message response corresponding to the repeated m times of sending the detection message frame and receiving the response message frame to form a response time sequence containing m real-value variables
Figure 746568DEST_PATH_IMAGE004
；
According to response time sequence
Figure 905541DEST_PATH_IMAGE005
And ideal time sequence
Figure 795000DEST_PATH_IMAGE006
Computing a similarity function
Figure 470832DEST_PATH_IMAGE007
For a given threshold
Figure 53123DEST_PATH_IMAGE008
When is coming into contact with
Figure 243933DEST_PATH_IMAGE009
When the satellite communication system is in the normal working state, judging that the current satellite communication system is in the normal working state, otherwise, judging that the current satellite communication system is in the abnormal working state; wherein the ideal time sequence
Figure 186350DEST_PATH_IMAGE006
Represents a time sequence obtained by repeating m times of sending a detection message frame and receiving a response message frame and respectively calculating the response time of a message in an initial state of the satellite communication system,
Figure 982268DEST_PATH_IMAGE011
. Similarity function
Figure 469881DEST_PATH_IMAGE007
The calculation formula of (a) is disclosed in the first embodiment, and is not described herein again.
And the network maintenance module is used for restarting or starting the backup equipment or the server. When the first state monitoring module finds that the work is abnormal, an automatic restarting command is sent, and when the work is abnormal again after restarting, the backup equipment or the server is replaced at the same time.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (8)

1. A satellite communication system operation state monitoring method based on IP response is characterized by comprising the following steps:
performing active IP message response test on each node device or server of the satellite communication system;
recording the response test result of the active IP message in real time, and judging and analyzing the network state of the node equipment or the server based on the test result;
and automatically maintaining the network according to the network state judgment result.
2. The method for monitoring the operating state of the satellite communication system based on the IP response according to claim 1, wherein the active IP packet response test for each node device or server of the satellite communication system comprises the following steps:
sending a detection message frame to node equipment or a server in the satellite communication system in a broadcast or multicast mode through a UDP protocol;
and receiving and analyzing a response message frame sent by the node equipment or the server in response to the detection message frame, and finishing the active discovery action of the node equipment or the server.
3. The method for monitoring the operating state of the satellite communication system based on the IP response as claimed in claim 2, wherein the step of recording the response test result of the active IP message in real time and performing the judgment and analysis of the network state of the node based on the test result comprises the following steps:
recording the time of sending the probe message frame as
Figure 999051DEST_PATH_IMAGE001
Recording the time of the response message frame sent by the receiving node equipment or the server in response to the detection message frame as
Figure 582479DEST_PATH_IMAGE002
Calculating the response time of the message as
Figure 769878DEST_PATH_IMAGE003
；
Repeating m times to send detection message frame and receive response message frame, calculating the corresponding time of message response, forming response time sequence containing m real-value variables
Figure 755151DEST_PATH_IMAGE004
；
According to the response time sequence
Figure 254790DEST_PATH_IMAGE005
And ideal time sequence
Figure 263198DEST_PATH_IMAGE006
Computing a similarity function
Figure 316604DEST_PATH_IMAGE007
For a given threshold
Figure 343335DEST_PATH_IMAGE008
When is coming into contact with
Figure 823995DEST_PATH_IMAGE009
When the satellite communication system is in the normal working state, judging that the current satellite communication system is in the normal working state, otherwise, judging that the current satellite communication system is in the abnormal working state; wherein the ideal time series
Figure 54119DEST_PATH_IMAGE010
Represents a time sequence obtained by repeating m times of sending a detection message frame and receiving a response message frame and respectively calculating the response time of a message in an initial state of the satellite communication system,
Figure 911217DEST_PATH_IMAGE011
。
4. the method as claimed in claim 3, wherein the similarity function is a function of the operational state of the satellite communication system
Figure 792454DEST_PATH_IMAGE007
The calculation process of (2) is as follows:
by
Figure 444015DEST_PATH_IMAGE005
And
Figure 427015DEST_PATH_IMAGE006
construct a
Figure 822224DEST_PATH_IMAGE012
The similarity difference matrix of (1)
Figure 557968DEST_PATH_IMAGE013
The element is
Figure 646009DEST_PATH_IMAGE005
And
Figure 913043DEST_PATH_IMAGE006
difference between two time points
Figure 784047DEST_PATH_IMAGE014
Wherein i and j are integer count values;
establishing a difference increasing sequence in the similarity difference matrix
Figure 452925DEST_PATH_IMAGE015
Where k and p are both integer counts less than or equal to m, then
Figure 161469DEST_PATH_IMAGE016
And satisfy
Figure 650219DEST_PATH_IMAGE017
；
Calculating the number array mean value E of the arithmetic increment number array S, wherein the calculation formula is as follows:
Figure DEST_PATH_IMAGE019
the similarity difference matrix can establish a plurality of difference incremental number rows S, and the number row mean value of each equal difference incremental number row S forms a mean value number row
Figure 590493DEST_PATH_IMAGE020
The similarity function
Figure 300829DEST_PATH_IMAGE007
Expressed as the minimum in the array of averaged numbers, i.e.:
Figure DEST_PATH_IMAGE021
Figure 402777DEST_PATH_IMAGE007
the smaller, the
Figure 644403DEST_PATH_IMAGE005
And
Figure 372056DEST_PATH_IMAGE006
the greater the similarity.
5. The method for monitoring the operating state of the satellite communication system based on the IP response as claimed in claim 1, wherein the automatic network maintenance according to the judgment result of the network state comprises the following steps:
sending an automatic memory sorting command to node equipment or a server;
updating and carrying out network state judgment analysis on the node equipment or the server;
if the network state judgment result shows that the work is abnormal, an automatic restart command is sent;
judging and analyzing the network state of the node equipment or the server again after the restart is finished;
and if the network state judgment result shows that the work is abnormal, an abnormal alarm is sent out, and the backup equipment or the server is replaced at the same time.
6. A satellite communication system running state monitoring system based on IP response is characterized in that: the system comprises an IP response server which is communicated with a plurality of node devices or servers in a satellite communication system, wherein the IP response server comprises:
the message testing module is used for carrying out active IP message response testing on each node device or server of the satellite communication system;
the state monitoring module is used for recording the response test result of the active IP message in real time and judging and analyzing the network state of the node equipment or the server based on the test result;
and the network maintenance module is used for restarting or starting the backup node equipment or the server.
7. The system according to claim 6, wherein the satellite communication system operating condition monitoring system based on the IP response comprises: the message testing module sends a detection message frame to node equipment or a server in the satellite communication system in a broadcast or multicast mode through a UDP protocol;
and the message testing module receives and analyzes a response message frame sent by the node equipment or the server in response to the detection message frame, and completes the active discovery action of the node equipment or the server.
8. The system according to claim 7, wherein the satellite communication system operating condition monitoring system based on the IP response comprises: the state monitoring module records the time for sending the detection message frame as
Figure 749948DEST_PATH_IMAGE001
Responding to the receiving node device or the serverThe time of the response message frame sent out by the detection message frame is recorded as
Figure 288376DEST_PATH_IMAGE002
Calculating the response time of the message as
Figure 751719DEST_PATH_IMAGE003
；
Respectively calculating the corresponding time of message response corresponding to the repeated m times of sending the detection message frame and receiving the response message frame to form a response time sequence containing m real-value variables
Figure 283063DEST_PATH_IMAGE004
；
According to response time sequence
Figure 781041DEST_PATH_IMAGE005
And ideal time sequence
Figure 224791DEST_PATH_IMAGE006
Computing a similarity function
Figure 441009DEST_PATH_IMAGE007
For a given threshold
Figure 513395DEST_PATH_IMAGE008
When is coming into contact with
Figure 865879DEST_PATH_IMAGE009
When the satellite communication system is in the normal working state, judging that the current satellite communication system is in the normal working state, otherwise, judging that the current satellite communication system is in the abnormal working state; wherein the ideal time series
Figure 480531DEST_PATH_IMAGE006
Represents a time sequence obtained by repeating m times of sending a detection message frame and receiving a response message frame and respectively calculating the response time of a message in an initial state of the satellite communication system,
Figure 918465DEST_PATH_IMAGE011
。
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Citations (6)

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