CN101588272A - Movable self-organization network test platform and method thereof - Google Patents
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Abstract
The invention relates to a movable self-organization network test platform and a method thereof. The platform comprises a network environment simulator, a plurality of network node controllers connected with the network environment simulator, and a position setting device corresponding to the network environment controller. The method comprises the following steps: the network node controller and the position setting device corresponding to the network node controller are utilized to simulate a network node to movably send or receive data; and the network environment simulator continuously changes the network topology according to the launching power and the position change of the network node, transmits the data according to the network topology, the receiving and sending state of the node and the sending and receiving channel information of the node, and simultaneously records and displays the receiving and sending condition and process of the network node and the change condition of the network topology. The platform and the method can simulate the continuous change condition of the network topology under a real network environment, further simulate multi-channel communication among nodes and also provides the time synchronization information for the nodes in the network.
Description
Technical field
The present invention relates to movable self-organization Ad Hoc network, be specifically related to a kind of movable self-organization network test platform and method thereof.
Background technology
Traditional mobile communication system is centralized control, the operation of network will be based on the network equipment that sets up in advance, but also inapplicable in the time can not adopting the control mode at center, at this moment need the network that can realize that interim fast automatic networking, node can move.Ad Hoc network is a kind of peer to peer network that special purpose is arranged, and compares with other communication networks, and the support that Ad Hoc network can be at any time, any place does not need existing information basic network facility builds a mobile communications network fast.Its foundation does not rely on existing network service facility, and this characteristics of Ad Hoc network are well suited for application such as disaster relief, remote districts communication.
In mobile Ad Hoc network, because communication node is movably, so also dynamic change thereupon of topology of networks, and mobile Ad Hoc network is a kind of network of multi-hop, and network topology can not be a full-mesh.In the development stage of Ad Hoc network, verify the correctness of network communication protocol, if rely on the actual physical channel, do a large amount of field tests, have very big difficulty.For example, in the checking Routing Protocol, need different topological structures, because the character of wireless transmission, will change topological structure when the field trial of reality is not easily, has caused in the difficulty of Ad Hoc Routing Protocol implementation phase to its debugging, test and checking.And experiment in the open air, the energy does not ensure that portable terminal adopts powered battery, and debugging is not can finish in the short time, in case and program needs to change, all experiment porch synchronous changes neither be easy to, and bring very big difficulty to the network service experiment.On equipment is prepared,, need gps system to realize net interior nodes time synchronized, so building of test platform is also quite expensive owing to need wireless network card or the physical layer data wireless transmission is realized in the radio station.
In the development stage of AdHoc network, needs are a kind of can be at the network environment analog machine of indoor debugging.The Related product that occurs all can not well satisfy the indoor debugging requirement of Ad Hoc network at present.
" the express network simulator design in the mobile ad hoc network " that Zhaoyang etc. propose, referring to " electronics technology " 2005.56-8, network simulator by multipoint control unit MCU and on-site programmable gate array FPGA realization, by network topology switch matrix analog network topological structure is set, for network node provides transmission channel, this network environment simulator has following deficiency:
1. network topology change is not continuous, it is normalized to the network topology switch matrix with network topology structure, realize network topology change by keyboard fan-in network topology switch matrix, and can not simulate one way link, differ greatly with real network environment, can not provide good support for the debugging of the Routing Protocol of Ad Hoc network;
2. the multichannel communication between can not analog node, node can not be provided with the channel of oneself, as long as in the network topology structure two nodes be link to each other just can mutual communication, inconsistent with the network environment of reality, the while can not provide good support for the debugging of the mac-layer protocol of Ad Hoc network;
3. can not provide time synchronization information for the node in the network.
Also having a lot of channel simulator products, mainly is the analogue radio transmissions characteristic of channel, mainly is that the physical layer protocol research for Ad Hoc network provides support.
Summary of the invention
The technical issues that need to address of the present invention are how a kind of movable self-organization network test platform and method thereof are provided, can be that is virtually reality like reality network environment lower network topology continually varying situation, further multichannel communication between the energy analog node further can provide time synchronization information for the node in the network.
Above-mentioned first technical problem of the present invention solves like this, and a kind of movable self-organization network test platform is provided, and comprising:
The network environment simulator continuously changes network topology according to the transmitting power and the change in location that are connected network node with it, and transmits data according to the reiving/transmitting state of described network topology, node and the transceiver channel information of node;
The network node controller of the routing algorithm of the mobile ad-hoc network that some operations are to be verified and MAC layer multiple access access protocol and corresponding position setting device thereof, be connected with described network environment simulator, simulate described network node and send or receive data and control it and move.
According to test platform provided by the invention, described network environment simulator comprises interfacing expansion module, flush bonding processor minimum systematic module and the image display module that connects successively, and described interfacing expansion module comprises the communication interface of some and described network node controller.
According to test platform provided by the invention, described position setting device is a keyboard, is connected with described flush bonding processor minimum systematic module.
Above-mentioned another technical problem of the present invention solves like this, and a kind of mobile ad-hoc network test method is provided, and may further comprise the steps:
4.1) utilize the network node controller and the corresponding position setting device analog network node motion thereof that connect with the network environment simulator to send or receive data;
4.2) described network environment simulator continuously changes network topology according to the transmitting power and the change in location of described network node, and transmit data according to the reiving/transmitting state of described network topology, node and the transceiver channel information of node, write down simultaneously and show the transmitting-receiving situation of described network node and the situation of change of process and network topology.
According to test method provided by the invention, each node in the network, network environment simulator all have a port corresponding with it, and the port of each network environment simulator all has a nodal information structure corresponding with it in software.Comprise the attribute information of node in the nodal information structure, mainly contain: the data that node ID number, node current state, node preceding state, node will send, the data that node is received, node receive channel, node transmitting channel, node transmitting power, node location x coordinate, node location y coordinate.The network node controller is provided with the node attribute information in the node structure body corresponding in the network environment simulator by sending control information; The network environment simulator is according to the node location coordinate information in each nodal information structure, node reiving/transmitting state information, and the transceiver channel information of node, the transmission power information of node generates current network topology structure.
According to test method provided by the invention, described analog network node motion includes, but are not limited to following two kinds of modes and simulates:
(1) changing the map network node coordinate by described position setting device finishes.
(2) preestablishing map network node motion model by described position setting device finishes.
According to test method provided by the invention, the transfer of data between described network node is to finish according to the reiving/transmitting state of described network topology, node and the transceiver channel information forwarding data of node by the network environment simulator.
According to test method provided by the invention, described network topology annexation is one way link or two-way link.
According to test method provided by the invention, this test method also is included in described network environment simulator and transmits that the difference according to the network node transmission path adds different error codes in the process of data.
According to test method provided by the invention, this test method comprises that also described network environment simulator provides time reference and time synchronization information for each described network node.
According to test method provided by the invention, this test method also comprises record and display network topological structure and node motion process, the reiving/transmitting state information of node, the transceiver channel information of node, the transmitting-receiving procedural information of node.
According to test method provided by the invention, between described network node list or multichannel communication.
According to test method provided by the invention, this test method also comprises the packet that each node of buffer memory receives and sends, for the debugging of network layer and MAC layer provides support.
A kind of movable self-organization network test platform provided by the invention and method thereof, can be that is virtually reality like reality network environment lower network topology continually varying situation, multichannel communication between further energy analog node, further can provide time synchronization information for the node in the network, network environment simulator wherein has following advantage than existing apparatus: 1. can simulate the multihop network topology, can change the network topology relation arbitrarily, and the translational speed of network node can be according to real situation simulation; 2. the analogue radio transmissions environment is realized internodal transfer of data, and can realize the characteristic of wireless channel, can add different error codes on each communication node transmission path; 3. can provide time reference and time synchronization information for the node in the network, to support TDMA or frequency hopping access protocol; 4. support the network topology structure of multifrequency layered distribution type, the multichannel communication between the node in can analog network; 5. can follow the tracks of the packet that each node receives and sends, for the debugging of network layer and MAC layer provides support; 6. can provide the human-computer interaction interface of relevant information to show, can the display network topological structure, node motion process, and network node reiving/transmitting state, transmitting-receiving course and transceiver channel information.
Description of drawings
Further the present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the Ad Hoc network experimental platform schematic diagram that the present invention is based on the network environment simulator;
Fig. 2 is a network environment simulation system block diagram of the present invention;
Fig. 3 is the network topology schematic diagram of three nodes.
Embodiment
The invention provides a kind of network environment simulator, for Routing Protocol and the mac-layer protocol of verifying mobile Ad Hoc network provides an indoor debugging enironment based on embedded system.
As shown in Figure 1, the Ad Hoc network experiment system of Network Environment simulator is made up of network environment simulator and network node controller.The network environment simulator is used for simulating mobile Ad Hoc network environment, the network node controller is simulated the node in the mobile Ad Hoc network, and operation needs the routing algorithm and the medium access control MAC layer multiple access access protocol of the mobile Ad Hoc network of exploitation in the network node controller.Can not direct communication between the network node and must just can communicate through the transfer of network environment simulator, if node 1 will send data to node 8, data at first are sent on the network environment simulator so, and then by the network environment simulator all packets are forwarded to the communication process that node 8 has just been finished node 1 and node 8 like this.
As shown in Figure 2, the network environment simulator is to be core with flush bonding processor minimum system and interfacing expansion module, also has image display module, Keysheet module.Flush bonding processor is finished the control of peripheral circuit, handles the control of whole network environment simulation.Interfacing expansion module is finished the expansion of network environment simulator external interface.Image display module can provide friendly human-computer interaction interface, can the display network topological structure, node reiving/transmitting state, node receive whether data bump, node transceiver channel and node transmitting-receiving course.The Keyboard Control module can Control Node move, and changes the position of node in the network, also can preset the node motion model simultaneously, selects default mobility model by keyboard.
For each node in the network, the network environment simulator all has a port corresponding with it, and the port of each network environment simulator all has a nodal information structure corresponding with it in software.Comprise the attribute information of node in the nodal information structure, mainly contain: the byte that node ID number, node current state, node preceding state, node will send, the byte that node is received, node receive channel, node transmitting channel, node transmitting power, node location x coordinate, node location y coordinate.The network node controller is provided with the node attribute information in the node structure body corresponding in the network environment simulator by sending control information.The mobile Ad Hoc network topology structure that the network environment simulator is simulated according to the relevant information in each nodal information structure when receiving the data message that network node is sent, is forwarded to corresponding network node according to network topology structure.The metadata cache that each port is received and sends is to memory simultaneously, for the debugging of network layer and MAC layer provides support.Image display module can be according to the information in the nodal information structure, the relevant information of display network.
Software in the network environment simulator divides two modules, and a module is used for realizing the simulation of network environment, and another module is used for realizing that the man-machine interface of relevant information on LCD shows.
The simulation of network environment mainly contains: network topology change, physical layer wireless channel transmit, provide aspects such as synchronizing signal.
The simulation of network topology change mainly relies on the network topology matrix to realize, the network topology matrix generates according to the transmitting power of the coordinate of node in the network and node.Node sends before the data, at first sends control information to the network environment simulator, and the node transmitted power is set, and begins to send data then.The node transmitted power in the nodal information structure is upgraded in the control information that the network environment simulator is sent according to node, makes node motion by Keysheet module simultaneously, thereby changes the coordinate information of node.The network environment simulator can obtain the received power of other nodes according to the coordinate information of node and the transmit signal power of node, when the received power of other nodes during greater than threshold value, is exactly unilaterally connected between sending node and the receiving node.The coordinate information of network node is moved by the Keysheet module Control Node and changes, also mobility model can be set in simulator in advance, the coordinate of node is changed according to default mobility model, node is in moving process, variation has taken place in coordinate, continuous variation will take place in network topology structure thereupon, rather than sudden change, more near the network topology change in the real network environment.
Our hypothesis, when node i sends data, the received signal power P of node j
IjExpression, received signal threshold power P
sExpression.Whether reaching threshold value by the decision node received signal power, if reach thresholding, think that then the reception data are effective, is unilaterally connected between transmitting node and the receiving node.Diconnected condition is P between two nodes
Ij＞P
s, P
Ji＞P
sSuppose that the network environment simulator has connected n node, can represent internodal topological connection relation with the matrix of a n * n.Work as m
Ij=1 o'clock, expression node S
iNode S when sending data
jCan receive; Work as m
Ij=0 o'clock, expression node S
iNode S when sending data
jCan not receive.Work as m
Ij=m
Ji=1 o'clock, expression S
iAnd S
jBetween be two-way link, the topological structure matrix M
IjCan describe one way link, work as m
IjWith m
JiBe not 1 o'clock simultaneously, represent S
iAnd S
jBetween be one way link.The network topology structure of 3 nodes as shown in Figure 3, S wherein
1, S
2, S
3It is the label of 3 nodes.Node S
1With node S
2Between be two-way link, node S
2With node S
3Between be one way link.Internodal topological connection relation is by the topological structure matrix M
IjExplain.The network topology matrix that the network topology structure of Fig. 3 forms as shown in Equation 1.
Analog physical layer wireless channel transmission mainly contains three aspects, and one, transceive data between the analog network node; Two, analog node message transmission rate; Three, error code on the transmission path between analog node.
Transceive data is done like this between the analog network node: network node is when start, default setting is an accepting state, network node is before sending data, send control information to the network environment simulator earlier, it is transmit status that node is set, and the transmitted power of node and the transmitting channel of node are set.The network environment simulator upgrades the node attribute information in the nodal information structure according to the control information that receives from each node.When the data message of receiving that node is sent, judge which node can receive that the foundation of judgement is: node is in the receipts state, and is on the same channel with sending node, and judges at the network topology matrix and to be communicated with sending node.Give receiving node with data forwarding then.If node is received other two or the data of coming two above nodes to send simultaneously, illustrate that collision has taken place node when receiving data, send to receiving node after the data negate with any one sending node wherein.
In the network environment simulator, utilize the timer of flush bonding processor to interrupt message transmission rate between analog node, when each interruption takes place, the network environment simulator is read the data of the network node that is in transmit status by interfacing expansion module, this process is equivalent to network node and sends data, in the network environment simulator, handle accordingly, drawing in the network node which is in accepting state can receive, and then being transmitted to the corresponding network node by interfacing expansion module, this process is equivalent to network node and receives data.Handle a byte data in each the interruption, the frequency of timer interruption is exactly the message transmission rate of node like this.
Can add error code on the transmission path arbitrarily, the data negate by port is read back is transmitted to corresponding receiving node then, and receiving node carries out verification after receiving data, thinks that data have error code in transmission course.Because the present invention provides an indoor debugging enironment for Routing Protocol and the mac-layer protocol of verifying mobile Ad Hoc network, do not relate to the research of physical layer, so the data message negate that just simply node is sent can not be reacted the bit error performance in the real wireless channel here.
Network simulator can send synchronizing signal for each network node, for the debugging of mac-layer protocol provides support, when the network environment simulator interrupts at each timer, the capital is from each node reading of data, and to byte data of each node transmission, the data that node can be sent with each network environment simulator are as time reference, and the node time benchmark of the whole network is exactly the same like this.The network environment simulator can send a time synchronizing signal for each node at specified time interval simultaneously, realizes that the whole network node is synchronous.
In order in experiment, to obtain more field control information, need a large amount of real time datas by the output of graphic model demonstration intuitively, so in this system, designed image display module, in image display module, can see the relevant information of network environment intuitively.In the network environment simulator, safeguarding the information structure of each node, comprise the position coordinates of node in the structure, the reiving/transmitting state of node, information such as the transceiver channel of node.According to the transmitted power of the coordinate information and the node of node, can display network topological structure and node motion situation; In the reiving/transmitting state and transceiver channel difference buffer memory to a FIFO with node, can show the real-time tranception process of node, and the used channel of node transceive data.Image display module is according to the information structure of each node, and constantly the refresh graphics display interface comprises the network topology viewing area on the right and the node transmitting-receiving course viewing area on the left side.In the network topology viewing area on the right, shown the network topology relation, and can show the state that node is current, red representation node sends data, and green representation node receives data, and collision has taken place when receiving data yellow representation node, blue representation node is not received data, in the node transmitting-receiving course viewing area on the left side, interface, the top part of show bar has shown the transmitting-receiving process of node, and following part shows the residing transceiver channel of node.
Based on the network environment simulator of embedded system, can realize the arbitrary topology relation between the network node, and the translational speed of network node can be according to real situation simulation; Can simulate the wireless communications environment of Ad Hoc network, realize internodal transfer of data, and can realize the characteristic of wireless channel; Time reference and time synchronization information can be provided for the node in the network; Multichannel communication between the node in can analog network; Human-computer interaction interface can the display network topological structure, and network node reiving/transmitting state, transmitting-receiving course and channel information.The self-organizing adaptation function of studying mobile Ad Hoc network, the laboratory experiment platform that provides of verifying procotol are provided.
Claims (12)
1, a kind of movable self-organization network test platform is characterized in that, comprising:
The network environment simulator continuously changes network topology according to the transmitting power and the change in location that are connected network node with it, and transmits data according to the reiving/transmitting state of described network topology, node and the transceiver channel information of node;
The network node controller of the routing algorithm of the mobile ad-hoc network that some operations are to be verified and MAC layer multiple access access protocol and corresponding position setting device thereof, be connected with described network environment simulator, simulate described network node and send or receive data and control it and move.
2, according to the described test platform of claim 1, it is characterized in that, described network environment simulator comprises interfacing expansion module, flush bonding processor minimum systematic module and the image display module that connects successively, and described interfacing expansion module comprises the communication interface of some and described network node controller.
According to the described test platform of claim 2, it is characterized in that 3, described position setting device is a keyboard, be connected with described flush bonding processor minimum systematic module.
4, a kind of mobile ad-hoc network test method is characterized in that, may further comprise the steps:
4.1) utilize the network node controller and the corresponding position setting device analog network node motion thereof that connect with the network environment simulator to send or receive data;
4.2) described network environment simulator changes network topology according to the transmitting power of described network node and change in location, and transmit data according to the reiving/transmitting state of described network topology, node and the transceiver channel information of node, write down simultaneously and show the transmitting-receiving situation of described network node and the situation of change of process and network topology.
According to the described test method of claim 4, it is characterized in that 5, described analog network node motion is to change the map network node coordinate or preestablish map network node motion model by described position setting device to finish.
According to the described test method of claim 4, it is characterized in that 6, the transfer of data between described network node is to finish according to the reiving/transmitting state of described network topology, node and the transceiver channel information forwarding data of node by the network environment simulator.
According to the described test method of claim 4, it is characterized in that 7, described network topology annexation is one way link or two-way link.
According to the described test method of claim 4, it is characterized in that 8, this test method also is included in described network environment simulator and transmits that the difference according to the network node transmission path adds different error codes in the process of data.
According to the described test method of claim 4, it is characterized in that 9, this test method comprises that also described network environment simulator provides time reference and time synchronization information for each described network node.
According to the described test method of claim 4, it is characterized in that 10, this test method also comprises record and display network topological structure and node motion process, show reiving/transmitting state, the transceiver channel of node and the transmitting-receiving process of node of node.
11, according to the described test method of claim 4, it is characterized in that, is list or multichannel communication between described network node.
According to the described test method of claim 4, it is characterized in that 12, this test method also comprises the packet that each node of buffer memory receives and sends, for the debugging of network layer and MAC layer provides support.
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| WO2012055277A1 (en) * | 2010-10-27 | 2012-05-03 | 中兴通讯股份有限公司 | Channel simulation apparatus and method |
| CN102790989A (en) * | 2011-05-19 | 2012-11-21 | 中兴通讯股份有限公司 | Simulation control device and method for wireless network channel |
| CN103179655A (en) * | 2013-04-07 | 2013-06-26 | 东南大学 | Distributed node power control method in mobile ad hoc network |
| CN103237321A (en) * | 2013-05-08 | 2013-08-07 | 重庆金美通信有限责任公司 | Physical layer channel analog method for testing network protocol stacks |
| CN103944758A (en) * | 2014-04-14 | 2014-07-23 | 张薇 | Interconnection and intercommunication state monitoring system |
| CN104735820A (en) * | 2015-04-07 | 2015-06-24 | 无锡职业技术学院 | On-site detecting system based on sensor self-organization algorithm |
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| CN102457336A (en) * | 2010-10-27 | 2012-05-16 | 中兴通讯股份有限公司 | Channel simulation device and method |
| WO2012055277A1 (en) * | 2010-10-27 | 2012-05-03 | 中兴通讯股份有限公司 | Channel simulation apparatus and method |
| CN102790989A (en) * | 2011-05-19 | 2012-11-21 | 中兴通讯股份有限公司 | Simulation control device and method for wireless network channel |
| CN103179655B (en) * | 2013-04-07 | 2015-12-02 | 东南大学 | Distributed node Poewr control method in mobile ad-hoc network |
| CN103179655A (en) * | 2013-04-07 | 2013-06-26 | 东南大学 | Distributed node power control method in mobile ad hoc network |
| CN103237321A (en) * | 2013-05-08 | 2013-08-07 | 重庆金美通信有限责任公司 | Physical layer channel analog method for testing network protocol stacks |
| CN103686820B (en) * | 2013-12-18 | 2017-03-29 | 中国电子科技集团公司第五十四研究所 | A kind of wireless communication network topology simulator apparatus |
| CN103944758A (en) * | 2014-04-14 | 2014-07-23 | 张薇 | Interconnection and intercommunication state monitoring system |
| CN104735820A (en) * | 2015-04-07 | 2015-06-24 | 无锡职业技术学院 | On-site detecting system based on sensor self-organization algorithm |
| CN104735820B (en) * | 2015-04-07 | 2018-01-05 | 无锡职业技术学院 | Checking system on the spot based on sensor self-organized algorithm |
| CN105472632A (en) * | 2015-11-18 | 2016-04-06 | 中国电子科技集团公司第三十研究所 | Construction method, construction device and construction system for simulation wireless network |
| CN105472632B (en) * | 2015-11-18 | 2019-04-26 | 中国电子科技集团公司第三十研究所 | A kind of construction method of analog wireless networks, device and system |
| CN110446224A (en) * | 2019-08-16 | 2019-11-12 | 四川九洲电器集团有限责任公司 | A kind of wireless network protocol adjustment method, system and computer storage medium, electronic equipment |
| CN110446224B (en) * | 2019-08-16 | 2020-12-08 | 四川九洲电器集团有限责任公司 | Wireless network protocol debugging method and system, computer storage medium and electronic equipment |
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