CN111092648B - Network simulation system and network test method - Google Patents
Network simulation system and network test method Download PDFInfo
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- CN111092648B CN111092648B CN201911351003.9A CN201911351003A CN111092648B CN 111092648 B CN111092648 B CN 111092648B CN 201911351003 A CN201911351003 A CN 201911351003A CN 111092648 B CN111092648 B CN 111092648B
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Abstract
The embodiment of the invention discloses a network simulation system and a network test method. The system comprises: at least one network channel configuration unit and at least two communication terminals belonging to different levels, wherein: the system comprises a superior communication end, at least one subordinate communication end and a control unit, wherein the superior communication end is connected with the at least one subordinate communication end through a corresponding network channel configuration unit, and the superior communication end and the at least one subordinate communication end are configured with a simulated network channel through the network channel configuration unit for data transmission; the network channel configuration unit includes: at least one switch and at least one network delay simulator. By the technical scheme of the invention, the simulation of different networks under the application of multi-level media forwarding can be realized at the same time, the application of a simulation system is convenient, and the simulation cost is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a network simulation system and a network test method.
Background
The satellite networking is a network mode of a satellite technology, wherein a network consists of a plurality of types of satellite systems on different orbits, a satellite constellation is used as a basic physical framework, the characteristics that the satellite system has a large coverage area and can obtain target multi-source information in a multi-level and full-spectrum section are fully utilized, and high-reliability information with accurate time and space reference and multi-factor fusion processing can be provided for users.
When testing is performed on the satellite networking based on the multi-level media forwarding application, the cost is high when the real satellite networking is used for testing, and limited satellite network resources are wasted, so that the satellite networking based on the multi-level media forwarding application needs to be simulated for testing. The media forwarding application means that media forwarding between multiple levels is required to be realized under the satellite networking, for example, under the satellite networking, a first-level unit is used as a conference chairman to hold a video conference, and after all second-level units and third-level units are used as members to participate in the conference, the chairman can see images of member terminals and hear sound of the member terminals; the member end can see the chairman image and hear the chairman sound, and perform the service functions of appointed speaking, meeting place forwarding and the like. All the transmission of the sound image is self-adaptive optimization based on the complex network condition, so as to achieve the application effect of smooth sound of the image and the image. Therefore, accurate simulation of complex networks is an important component of performing overall system testing.
In the prior art, a network simulation system is mainly realized by simply using equipment such as a WANem network simulator, a Ciboren network damage instrument, a three-layer switch and the like, so that the prior art scheme can only singly and locally meet the network simulation in the multi-level media forwarding application, and in addition, some special equipment is scarce and expensive, thereby greatly improving the simulation cost.
Disclosure of Invention
Embodiments of the present invention provide a network simulation system and a network testing method, so as to simultaneously implement simulation of different networks under multi-level media forwarding application, facilitate application of a simulation system, and reduce simulation cost.
In a first aspect, an embodiment of the present invention provides a network simulation system, including: at least one network channel configuration unit and at least two communication terminals belonging to different levels, wherein:
the system comprises a superior communication end, at least one subordinate communication end and a control unit, wherein the superior communication end is connected with the at least one subordinate communication end through a corresponding network channel configuration unit, and the superior communication end and the at least one subordinate communication end are configured with a simulated network channel through the network channel configuration unit for data transmission;
the network channel configuration unit includes: at least one switch and at least one network delay simulator.
Further, the network channel comprises a multiple shared channel.
Further, the network channel configuration unit for configuring the multiple shared channels includes: first switch, network delay simulator and second switch, wherein:
the upper communication end is connected with the first switch, the first switch is connected with the network delay simulator, the network delay simulator is connected with the second switch, and the second switch is respectively connected with at least two lower communication ends;
the first switch is used for setting an entrance bandwidth corresponding to the transmission of data from the lower communication end to the upper communication end or an exit bandwidth corresponding to the transmission of data from the upper communication end to the lower communication end so as to simulate the communication bandwidth of the multi-channel shared channel;
the network delay simulator is used for setting network delay and packet loss rate so as to simulate the delay and packet loss rate of the multi-path shared channel;
the second switch is configured to convert one path of signal corresponding to the higher-level communication terminal into a plurality of paths of signals corresponding to the lower-level communication terminals, respectively, or convert a plurality of paths of signals corresponding to the lower-level communication terminals into a plurality of paths of signals corresponding to the higher-level communication terminal.
Further, the network channel comprises a single path exclusive channel.
Further, the network channel configuration unit for configuring the single channel shared channel includes: a switch and at least one network latency simulator, wherein:
the upper communication end is connected with the switch, the switch is connected with at least one network delay simulator, and each network delay simulator is respectively connected with the corresponding lower communication end;
the switch is used for respectively setting an entrance bandwidth corresponding to the lower-level communication end when transmitting data to the upper-level communication end or an exit bandwidth corresponding to the upper-level communication end when transmitting data to the lower-level communication end so as to simulate the communication bandwidth of the lower-level communication end corresponding to the single-channel single-shared channel;
the network delay simulator is used for setting network delay and packet loss rate corresponding to data transmission between the superior communication terminal and the subordinate communication terminal connected with the network delay simulator so as to simulate the delay and packet loss rate of the subordinate communication terminal corresponding to the single-path exclusive channel.
Further, when a plurality of lower communication terminals are provided, the switch is further configured to convert one path of signal corresponding to the higher communication terminal into a plurality of paths of signals corresponding to the lower communication terminals, or convert a plurality of paths of signals corresponding to the lower communication terminals into a plurality of paths of signals corresponding to the higher communication terminal.
Further, the switch is a three-layer switch.
Further, the network delay simulator is a universal device with three network ports based on a LINUX operating system.
In a second aspect, an embodiment of the present invention further provides a network testing method, which is applied to any one of the network simulation systems in this embodiment, and includes:
when a superior communication terminal receives an uplink network test instruction, acquiring first audio and video data sent by a corresponding subordinate communication terminal through a configuration simulated network channel according to the network test instruction;
the superior communication terminal tests the performance of the index to be tested in the network channel according to the playing effect of the first audio and video data;
the bandwidth of the network channel is simulated by setting the entrance bandwidth of the switch, and the delay and the packet loss rate of the network channel are simulated by setting the network delay and the packet loss rate of the network delay simulator.
In a third aspect, an embodiment of the present invention further provides a network testing method applied to any one of the network simulation systems in this embodiment, including:
when receiving a downlink network test instruction, a lower communication terminal acquires second audio and video data sent by a corresponding upper communication terminal through a configuration simulated network channel according to the network test instruction;
the lower communication terminal tests the performance of the index to be tested in the network channel according to the playing effect of the second audio and video data;
the bandwidth of the network channel is simulated by setting the outlet bandwidth of the switch, and the delay and the packet loss rate of the network channel are simulated by setting the network delay and the packet loss rate of the network delay simulator.
The embodiment of the invention sets at least one network channel configuration unit and at least two communication terminals belonging to different levels in a network simulation system, wherein, a superior communication terminal is connected with at least one subordinate communication terminal through a corresponding network channel configuration unit, the superior communication terminal and the subordinate communication terminal are configured with simulated network channels through the network channel configuration unit for data transmission, and the network channel configuration unit comprises at least one exchanger and at least one network delay simulator, the advantages of low price and the like that the exchanger and the network delay simulator can be used for setting parameters such as bandwidth, delay, packet loss rate and the like of different network channels are utilized, the problems that the network simulation in the application of multi-level media forwarding can only be satisfied singly and locally in the prior art and the simulation cost is high are solved, and the simulation of different networks in the application of multi-level media forwarding is realized at the same time, the application of the simulation system is facilitated, and the simulation cost is reduced.
Drawings
Fig. 1a is a schematic structural diagram of a network simulation system according to an embodiment of the present invention;
fig. 1b is a schematic view of a usage scenario of a multi-level media forwarding application in which an embodiment of the present invention is applicable;
fig. 2 is a schematic structural diagram of a network simulation system according to a second embodiment of the present invention;
fig. 3 is a schematic flowchart of a network testing method according to a third embodiment of the present invention;
fig. 4 is a flowchart illustrating a network testing method according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1a is a schematic structural diagram of a network simulation system according to an embodiment of the present invention. The network simulation system can be applied to the situation of simulating the satellite networking under the application of multi-level media forwarding, wherein the scene of the application of multi-level media forwarding can be, for example, the application scene shown in fig. 1b, in the figure, under the satellite networking, a first-level unit is used as a conference chairman to hold a video conference, and after all second-level units and third-level units are used as members to participate in the conference, the chairman can see images of the member terminals and hear the sounds of the member terminals; the member end can see the chairman image and hear the chairman sound, and perform the service functions of appointed speaking, meeting place forwarding and the like.
The network simulation system provided in this embodiment specifically includes: at least one network channel configuration unit and at least two communication terminals belonging to different levels.
The system comprises a superior communication end, at least one subordinate communication end and at least one network channel configuration unit, wherein the superior communication end is connected with the subordinate communication end through the corresponding network channel configuration unit, and the superior communication end and the subordinate communication end are configured with a simulated network channel through the network channel configuration unit for data transmission; the network channel configuration unit comprises: at least one switch and at least one network delay simulator.
As shown in fig. 1a, taking 6 communication terminals belonging to three levels and 3 corresponding network channel configuration units as an example, a first communication terminal 11 belongs to a first-level communication terminal; the second communication terminal 12 and the third communication terminal 13 belong to a second-level communication terminal; the fourth communication terminal 14, the fifth communication terminal 15 and the sixth communication terminal 16 belong to three-level communication terminals.
It should be noted that, in the embodiment, the upper level communication end and the lower level communication end are relatively related, for example, the first level communication end is the upper level communication end and the second level communication end is the lower level communication end compared to the second level communication end; compared with the third-level communication terminal, the second-level communication terminal is a higher-level communication terminal, the third-level communication terminal is a lower-level communication terminal, and so on. The communication terminal may be a server or a terminal device, and is not limited herein.
In fig. 1a, specifically, the first communication terminal 11 is connected to the second communication terminal 12 and the third communication terminal 13 through the first network channel configuration unit 21, the second communication terminal 12 is connected to the fourth communication terminal 14 and the fifth communication terminal 15 through the second network channel configuration unit 22, and the third communication terminal 13 is connected to the sixth communication terminal 16 through the third network channel configuration unit 23.
In this embodiment, each network channel configuration unit may include at least one switch and at least one network delay simulator, where the switch may be configured to simulate a bandwidth of a network channel between two stages of communication ends by setting an ingress bandwidth or an egress bandwidth, and the network delay simulator may be configured to simulate a delay and a packet loss rate of the network channel between the two stages of communication ends by setting a network delay and a packet loss rate.
Specifically, the number of switches and the number of network delay simulators in the network channel configuration unit may be determined by the type of the network channel. For example, when the network channel configured by the network channel configuration unit is a multiple shared channel, the network channel configuration unit may specifically include two switches and a network delay simulator; when the network channel configured by the network channel configuration unit is a single-channel independent channel, the network channel configuration unit may specifically include an exchange and a network delay simulator correspondingly connected to a subordinate communication terminal.
Optionally, the switch is a three-layer switch.
Because a plurality of net gapes of three-layer switch can carry out the restriction of ascending, descending bandwidth to a plurality of different communication ends, consequently, the switch of this embodiment adopts three-layer switch's advantage to lie in, can realize the data transmission between the multiple spot, satisfies the demand of crossing the network segment, convenient to use, and equipment price is substantial.
Optionally, the network delay simulator is a universal device with three network ports based on a LINUX operating system.
In this embodiment, the network delay simulator may be a three-port universal device with a LINUX operating system, and since the flow control may be performed by using the TC instruction of the LINUX kernel, the network packet loss rate and the network delay may be set.
The technical solution of this embodiment is that at least one network channel configuration unit and at least two communication terminals belonging to different stages are arranged in a network simulation system, wherein a superior communication terminal is connected to at least one subordinate communication terminal through a corresponding network channel configuration unit, the superior communication terminal and the subordinate communication terminal are configured with a simulated network channel through the network channel configuration unit for data transmission, and the network channel configuration unit includes at least one switch and at least one network delay simulator, and the switch and the network delay simulator can be used for setting parameters such as bandwidth, delay, packet loss rate, and the like of different network channels, and are low in cost, thereby solving the problem that only single and partial network simulation in the application of multi-stage media forwarding in the prior art is satisfied, and the simulation cost is high, and realizing the simulation of different networks in the application of multi-stage media forwarding at the same time, the application of the simulation system is facilitated, and the simulation cost is reduced.
Example two
Fig. 2 is a schematic structural diagram of a network simulation system according to a second embodiment of the present invention. The present embodiment is optimized based on the above embodiments, and provides a preferred network simulation system, specifically, a network channel is further optimized to include multiple shared channels and/or a single shared channel.
Wherein, optionally, the network channel comprises a multiple shared channel.
For example, the network channel type is a multiple shared channel, that is, in the case of data transmission between an upper communication terminal and a plurality of lower communication terminals, the plurality of lower communication terminals may share the same network channel to communicate with the upper communication terminal. For example, as shown in fig. 2, the first communication terminal 11, the second communication terminal 12 and the third communication terminal 13 perform data transmission through a shared channel.
Optionally, the network channel configuring unit for configuring multiple shared channels includes: first switch, network delay simulator and second switch, wherein: the upper-level communication end is connected with a first switch, the first switch is connected with a network delay simulator, the network delay simulator is connected with a second switch, and the second switch is respectively connected with at least two lower-level communication ends; the first switch is used for setting the corresponding entrance bandwidth when the lower-level communication end transmits data to the upper-level communication end or the corresponding exit bandwidth when the upper-level communication end transmits data to the lower-level communication end so as to simulate the communication bandwidth of a multi-channel shared channel; the network delay simulator is used for setting network delay and packet loss rate so as to simulate the delay and packet loss rate of a multi-path shared channel; and the second switch is used for converting one path of signal corresponding to the superior communication end into a plurality of paths of signals corresponding to the subordinate communication ends respectively, or converting the plurality of paths of signals corresponding to the subordinate communication ends into one path of signal corresponding to the superior communication end.
As shown in fig. 2, the network channel configuration unit for configuring multiple shared channels, that is, the first network channel configuration unit 21, includes: the first communication terminal 11 is connected to the first switch 211, the first switch 211 is connected to the first network delay simulator 212, the first network delay simulator 212 is connected to the second switch 213, and the second switch 213 is connected to the second communication terminal 12 and the third communication terminal 13, respectively.
As an actual example for the case of multiple shared channels, as shown in fig. 2, if the networking requirement is that a satellite communication carrier is used between the first communication terminal 11 and the second communication terminal 12 and the third communication terminal 13, based on the connection manner, the network simulation can be implemented by the following settings.
The setting is as follows: setting an ingress bandwidth to 2M through the first switch 211; setting the network delay between the first-level communication terminal (namely, the first communication terminal 11) and the second-level communication terminal (namely, the second communication terminal 12 and the third communication terminal 13) to 700ms and the packet loss rate to 6% by using the first network delay simulator 212; when the first communication terminal 11 checks the video and audio of the second communication terminal 12 and the third communication terminal 13, the communication data passes through the inlet of the first switch 211, the first network delay simulator 212, and the inlet of the second switch 213, the second communication terminal 12 and the third communication terminal 13 share the 2M bandwidth, the 700ms delay, and the 6% packet loss network to upload the video and audio to the first communication terminal 11, and the first communication terminal 11 also uses the network to download and check the video and audio corresponding to the second communication terminal 12 and the third communication terminal 13.
Setting the second step: setting the egress bandwidth to 2M by the first switch 211; setting the network delay between the first-level communication end (namely, the first communication end 11) and the second-level communication end (namely, the second communication end 12 and the third communication end 13) to be 700ms and the packet loss rate to be 6% through the first network delay simulator 212; when the second communication terminal 12 and the third communication terminal 13 check the audio/video of the first communication terminal 11, the communication data passes through the first switch 211 outlet, the first network delay simulator 212 and the second switch 213 outlet, and the 2M bandwidth, 700ms delay and 6% packet loss network are used.
Optionally, the network channel may further include a single channel exclusive channel.
The network channel type is exemplarily a single channel shared channel, that is, in a case of data transmission between an upper communication terminal and a plurality of lower communication terminals, or in a case of data transmission between an upper communication terminal and a lower communication terminal, it may be that one lower communication terminal exclusively shares one network channel to communicate with the upper communication terminal. For example, as shown in fig. 2, the data transmission is performed between the second communication terminal 12 and the fourth communication terminal 12 and the fifth communication terminal 15, and between the third communication terminal 13 and the sixth communication terminal 16 through a single-channel shared channel.
Optionally, the network channel configuration unit for configuring the single channel shared channel includes: a switch and at least one network latency simulator, wherein: the upper-level communication end is connected with the switch, the switch is connected with at least one network delay simulator, and each network delay simulator is respectively connected with the corresponding lower-level communication end; the switch is used for respectively setting an entrance bandwidth corresponding to the lower-level communication end when transmitting data to the upper-level communication end or an exit bandwidth corresponding to the upper-level communication end when transmitting data to the lower-level communication end so as to simulate the communication bandwidth of the lower-level communication end corresponding to the single-channel exclusive channel; the network delay simulator is used for setting network delay and packet loss rate corresponding to data transmission between a superior communication terminal and a communication terminal connected with the network delay simulator so as to simulate the delay and packet loss rate of a subordinate communication terminal corresponding to a single-path exclusive channel.
Optionally, when a plurality of lower communication terminals are provided, the switch is further configured to convert one path of signal corresponding to the higher communication terminal into a plurality of paths of signals corresponding to each lower communication terminal, or convert a plurality of paths of signals corresponding to each lower communication terminal into a plurality of paths of signals corresponding to the higher communication terminal.
In this embodiment, the single channel individual shared channel can be divided into the following two connection cases:
in the first connection case, data transmission is performed between an upper communication terminal and a plurality of lower communication terminals. For example, as shown in fig. 2, the network channel configuration unit for configuring the multiple shared channels, that is, the second network channel configuration unit 22, includes: the third switch 221, the second network delay simulator 222 and the third network delay simulator 223, wherein the second communication terminal 12 is connected to the third switch 221, the third switch 221 is connected to the second network delay simulator 222 and the third network delay simulator 223 respectively, the second network delay simulator 222 is connected to the fourth communication terminal 14, and the third network delay simulator 223 is connected to the fifth communication terminal 15.
In the second case, data is transmitted between a higher-level communication terminal and a lower-level communication terminal. For example, as shown in fig. 2, the network channel configuration unit for configuring the multiple shared channels, that is, the third network channel configuration unit 23 includes: a fourth switch 231 and a fourth network delay simulator 232, wherein the third communication terminal 13 is connected to the fourth switch 231, the fourth switch 231 is connected to the fourth network delay simulator 232, and the fourth network delay simulator 232 is connected to the sixth communication terminal 16.
As an actual example for the above two cases of single channel sharing, as shown in fig. 2, if the networking requires that two satellite subcarriers are respectively used between the second communication terminal 12 and the fourth communication terminal 14 and the fifth communication terminal 15, and a satellite carrier is used between the third communication terminal 13 and the sixth communication terminal 16, then the network simulation can be implemented by the following arrangement based on the above two connection manners.
The setting is as follows: the third switch 221 sets the entrance bandwidth of the fourth communication terminal 14 to be 0.9M; setting the network delay of 700ms and the packet loss rate of 7% by a second network delay simulator 222; when the second communication terminal 12 views the video and audio of the fourth communication terminal 14, the communication data passes through the third switch 221 inlet-the second network delay simulator 222, the fourth communication terminal 14 uploads the image by using the network with the bandwidth of 0.9M, the delay of 700ms and the packet loss rate of 7%, and the second communication terminal 12 also downloads and views the video and audio of the fourth communication terminal 14 by using the network.
The third switch 221 sets the entrance bandwidth to the fifth communication terminal 15 to be 1.5M; setting the network delay of 700ms and the packet loss rate of 7% through a third network delay simulator 223; when the second communication end 12 views the video and audio of the fifth communication end 15, the communication data passes through the third switch 221 entry-the third network delay simulator 223, the fifth communication end 15 uploads the image using a network with a bandwidth of 1.5M, a delay of 700ms, and a packet loss rate of 7%, and the second communication end 12 also downloads and views the video and audio of the fifth communication end 15 using the network.
The fourth switch 231 sets the bandwidth of the entrance to the fifth communication terminal 15 to be 2M; setting the network delay of 700ms and the packet loss rate of 7% by a fourth network delay simulator 232; when the third communication terminal 13 views the video and audio of the sixth communication terminal 16, the communication data passes through the fourth switch 231 inlet-the fourth network delay simulator 232, the sixth communication terminal 16 uploads the image by using the network with 2M bandwidth, 700ms delay and 7% packet loss rate, and the third communication terminal 13 also downloads and views the video and audio of the sixth communication terminal 16 by using the network.
Setting the second step: when the outlet bandwidth is set to be 2M by the first switch 211, and the fourth communication terminal 14 checks the video and audio of the first communication terminal 11, the communication data passes through the outlet of the first switch 211, the first network delay simulator 212, the outlet of the second switch 213, the outlet of the third switch 221, and the second network delay simulator 222, and the network with 2M bandwidth, 1400ms delay, and 12% packet loss is used, and the third-level unit E, F is the same, which is not described herein again.
In addition, when the network simulation system provided by this embodiment is used for testing, the validity of the set packet loss and time delay can be verified in a mode of a PING packet at the communication terminal, and the validity of the set bandwidth can be verified by transmitting a file at the communication terminal.
As shown in fig. 2, after the analog networking is successful, the first communication terminal 11 is used as a chairman to hold a conference, and invite the second communication terminal 12, the third communication terminal 13, the fourth communication terminal 14, the fifth communication terminal 15, and the sixth communication terminal 16 to enter a conference; the first communication terminal 11 can hear the sound of all the participating members as a chairman and see the image sound of the second communication terminal 12 and the third communication terminal 13; the second communication terminal 12 and the third communication terminal 13 can see the image and sound of the fourth communication terminal 14, the fifth communication terminal 15 and the sixth communication terminal 16 and the image and sound of the first communication terminal 11; the fourth communication terminal 14, the fifth communication terminal 15 and the sixth communication terminal 16 can hear the sound of the chairman of the first communication terminal 11 and see the image of the first communication terminal 11. Different network simulations under the application of multi-level media forwarding can be simultaneously realized through a plurality of three-layer switches and network delay simulators, so that the sufficiency test of media forwarding under the condition of a complex network is realized.
According to the technical scheme of the embodiment, the switches and the network delay simulators with different quantities are correspondingly arranged under the application of multi-level media forwarding according to different types of network channels, so that the switches and the network delay simulators can be used for setting parameters such as bandwidth, delay and packet loss rate of different network channels, and the advantages of low price are utilized, the problems that in the prior art, network simulation in the application of multi-level media forwarding can only be met singly and locally, and the simulation cost is high are solved, the simulation of different networks under the application of multi-level media forwarding is realized, the application of a simulation system is facilitated, and the simulation cost is reduced.
EXAMPLE III
Fig. 3 is a schematic flow chart of a network testing method according to a third embodiment of the present invention. The method is applicable to the condition of testing the performance of the index to be tested in the uplink network channel, and can be executed by a network testing device, wherein the device can be composed of hardware and/or software and can be integrated in the superior communication end of the network simulation system in any embodiment. The method specifically comprises the following steps:
and S310, when the superior communication terminal receives the uplink network test instruction, acquiring first audio and video data sent by the corresponding inferior communication terminal through a configuration simulated network channel according to the network test instruction.
In this embodiment, the uplink network test instruction may be a video request sent by a user, and is used to obtain audio and video data of the lower-level communication terminal. Illustratively, after initiating a video conference, a user of a superior communication terminal may invite each subordinate communication terminal to participate, and obtain image and sound data of each subordinate communication terminal as first audio and video data.
Because the testing cost is greatly increased by using a real satellite networking, in the embodiment, the testing is performed in the configured and simulated network channel, and the superior communication terminal can receive and acquire the audio and video data, namely the first audio and video data, acquired and transmitted by all the subordinate communication terminals through the configured and simulated network channel, so that the testing in the simulated network channel is realized, and the testing cost is reduced.
S320, the superior communication terminal tests the performance of the index to be tested in the network channel according to the playing effect of the first audio and video data; the bandwidth of the network channel is simulated by setting the entrance bandwidth of the switch, and the delay and the packet loss rate of the network channel are simulated by setting the network delay and the packet loss rate of the network delay simulator.
For example, the index to be tested may be a parameter index such as a data processing algorithm to be tested that needs to be tested by using a network, and is not limited herein. The index to be detected is evaluated by using the playing effect of the first audio/video data in the superior communication terminal, such as the image definition, the audio/video fluency and the like, so that the improvement basis of the index to be detected is provided for developers.
It should be noted that, in this embodiment, the parameters of the network channel are configured and simulated through the switch and the network delay simulator, specifically, the bandwidth of the network channel when the lower communication terminal performs data transmission to the upper communication terminal is simulated by setting the entrance bandwidth of the switch, and the delay and the packet loss rate of the network channel are set by setting the network delay and the packet loss rate of the network delay simulator. For a specific setting manner, reference may be made to the description of this portion in each embodiment, and details are not described herein.
According to the technical scheme of the embodiment, on the basis of the above embodiments, when a higher-level communication end in the network simulation system receives an uplink network test instruction, first audio and video data sent by a corresponding lower-level communication end through a configured simulated network channel is obtained according to the network test instruction, and the performance of an index to be tested in the network channel is tested according to the playing effect of the first audio and video data, wherein the bandwidth of the network channel is simulated by setting the entrance bandwidth of a switch, and the delay and the packet loss rate of the network channel are simulated by setting the network delay and the packet loss rate of a network delay simulator. The simulated network channel is configured by the switch and the network delay simulator for testing, so that the testing cost is reduced.
Example four
Fig. 4 is a flowchart illustrating a network testing method according to a fourth embodiment of the present invention. The method is applicable to the case of testing the performance of the index to be tested in the downlink network channel, and the method can be executed by a network testing device, and the device can be composed of hardware and/or software and can be integrated in the lower communication terminal of the network simulation system in any of the above embodiments. The method specifically comprises the following steps:
and S410, when the lower communication terminal receives the downlink network test instruction, acquiring second audio and video data sent by the corresponding upper communication terminal through a configuration simulated network channel according to the network test instruction.
In this embodiment, the downlink network test instruction may be a video request sent by a user, and is used to acquire audio and video data of a superior communication terminal. For example, after initiating a video conference, a user of a higher communication end may invite each lower communication end to participate in the conference, and obtain image and sound data of each lower communication end, and at the same time, the lower communication end may also obtain image and sound data of its higher communication end as second audio and video data.
Because the testing cost is greatly increased by using a real satellite networking, in the embodiment, the testing is performed in the configuration simulation network channel, and the lower-level communication terminal can receive and acquire the audio and video data acquired and transmitted by the upper-level communication terminal through the configuration simulation network channel, namely the second audio and video data, so that the testing in the simulation network channel is realized, and the testing cost is reduced.
S420, the lower-level communication terminal tests the performance of the index to be tested in the network channel according to the playing effect of the second audio/video data; the bandwidth of the network channel is simulated by setting the outlet bandwidth of the switch, and the delay and the packet loss rate of the network channel are simulated by setting the network delay and the packet loss rate of the network delay simulator.
For example, the index to be tested may be a parameter index such as a data processing algorithm to be tested that needs to be tested by using a network, and is not limited herein. The index to be detected is evaluated by using the playing effect of the second audio/video data in the lower-level communication terminal, such as the image definition, the audio/video fluency and the like, so that the improvement basis of the index to be detected is provided for developers.
It should be noted that, in this embodiment, the parameters of the network channel are also configured and simulated through the switch and the network delay simulator, specifically, the bandwidth of the network channel when the upper level communication terminal performs data transmission to the lower level communication terminal may be simulated by setting the exit bandwidth of the switch, and the delay and the packet loss rate of the network channel may be set by setting the network delay and the packet loss rate of the network delay simulator. For a specific setting manner, reference may be made to the description of this portion in each embodiment, and details are not described herein.
According to the technical scheme of the embodiment, on the basis of the above embodiments, when a lower communication end in the network simulation system receives a downlink network test instruction, second audio and video data sent by a corresponding upper communication end through a network channel configured with simulation is obtained according to the network test instruction, and the performance of an index to be tested in the network channel is tested according to the playing effect of the second audio and video data, wherein the bandwidth of the network channel is simulated by setting the outlet bandwidth of a switch, and the delay and the packet loss rate of the network channel are simulated by setting the network delay and the packet loss rate of a network delay simulator. The simulated network channel is configured by the switch and the network delay simulator for testing, so that the testing cost is reduced.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A network simulation system, comprising: at least one network channel configuration unit and at least two communication terminals belonging to different levels, wherein:
the system comprises a superior communication end, at least one subordinate communication end and a control unit, wherein the superior communication end is connected with the at least one subordinate communication end through a corresponding network channel configuration unit, and the superior communication end and the at least one subordinate communication end are configured with a simulated network channel through the network channel configuration unit for data transmission;
the network channel configuration unit includes: at least one switch and at least one network delay simulator;
the number of the switches and the number of the network delay simulators in the network channel configuration unit are determined by the type of the network channel;
the network channel comprises a multiple shared channel;
the network channel configuration unit for configuring the multiple shared channels comprises: first switch, network delay simulator and second switch, wherein:
the superior communication end is connected with the first switch, the first switch is connected with the network delay simulator, the network delay simulator is connected with the second switch, and the second switch is respectively connected with at least two subordinate communication ends;
the first switch is used for setting an entrance bandwidth corresponding to the transmission of data from the lower communication end to the upper communication end or an exit bandwidth corresponding to the transmission of data from the upper communication end to the lower communication end so as to simulate the communication bandwidth of the multi-channel shared channel;
the network delay simulator is used for setting network delay and packet loss rate so as to simulate the delay and packet loss rate of the multi-path shared channel;
the second switch is configured to convert one path of signal corresponding to the higher-level communication terminal into a plurality of paths of signals corresponding to the lower-level communication terminals, respectively, or convert a plurality of paths of signals corresponding to the lower-level communication terminals into a plurality of paths of signals corresponding to the higher-level communication terminal.
2. The network simulation system of claim 1, wherein the network channel comprises a single channel exclusive channel.
3. The network simulation system of claim 2, wherein the network channel configuration unit for configuring the single channel-only shared channel comprises: a switch and at least one network latency simulator, wherein:
the upper communication end is connected with the switch, the switch is connected with at least one network delay simulator, and each network delay simulator is respectively connected with the corresponding lower communication end;
the switch is used for respectively setting an entrance bandwidth corresponding to the lower-level communication end when transmitting data to the upper-level communication end or an exit bandwidth corresponding to the upper-level communication end when transmitting data to the lower-level communication end so as to simulate the communication bandwidth of the lower-level communication end corresponding to the single-channel single-shared channel;
the network delay simulator is used for setting network delay and packet loss rate corresponding to data transmission between the superior communication terminal and the subordinate communication terminal connected with the network delay simulator so as to simulate the delay and packet loss rate of the subordinate communication terminal corresponding to the single-path exclusive channel.
4. The network simulation system according to claim 3, wherein when there are a plurality of lower communication terminals, the switch is further configured to convert a path of signal corresponding to the upper communication terminal into a plurality of paths of signals corresponding to the lower communication terminals, or convert a plurality of paths of signals corresponding to the lower communication terminals into a path of signal corresponding to the upper communication terminal.
5. The network simulation system of any of claims 1-4, wherein the switch is a three-tier switch.
6. The network simulation system of any of claims 1-4, wherein the network latency simulator is a three-port universal device based on a LINUX operating system.
7. A network test method applied to the network simulation system according to any one of claims 1 to 6, comprising:
when a superior communication terminal receives an uplink network test instruction, acquiring first audio and video data sent by a corresponding subordinate communication terminal through a configuration simulated network channel according to the network test instruction;
the superior communication terminal tests the performance of the index to be tested in the network channel according to the playing effect of the first audio and video data;
the bandwidth of the network channel is simulated by setting the entrance bandwidth of the switch, and the delay and the packet loss rate of the network channel are simulated by setting the network delay and the packet loss rate of the network delay simulator.
8. A network test method applied to the network simulation system according to any one of claims 1 to 6, comprising:
when receiving a downlink network test instruction, a lower communication terminal acquires second audio and video data sent by a corresponding upper communication terminal through a configuration simulated network channel according to the network test instruction;
the subordinate communication terminal tests the performance of the index to be tested in the network channel according to the playing effect of the second audio and video data;
the bandwidth of the network channel is simulated by setting the outlet bandwidth of the switch, and the delay and the packet loss rate of the network channel are simulated by setting the network delay and the packet loss rate of the network delay simulator.
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