CN102209342B - Experimental device for heterogeneous wireless network having strong bandwidth difference characteristic - Google Patents
Experimental device for heterogeneous wireless network having strong bandwidth difference characteristic Download PDFInfo
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- CN102209342B CN102209342B CN 201110154572 CN201110154572A CN102209342B CN 102209342 B CN102209342 B CN 102209342B CN 201110154572 CN201110154572 CN 201110154572 CN 201110154572 A CN201110154572 A CN 201110154572A CN 102209342 B CN102209342 B CN 102209342B
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Abstract
The invention discloses an experimental device for a heterogeneous wireless network having a strong bandwidth difference characteristic. The experimental device is applicable to a 2.4GHz wireless network, a 400MHz wireless network, a 5.8GHz wireless network, a code division multiple access (CDMA) network and a very high frequency (VHF) range wireless network. The experimental device comprises a general computer, software radio equipment, a CDMA router and a VHF radio station simulator. The general computer is connected with the software radio equipment for establishing the 2.4GHz wireless network, the 400MHz wireless network and the 5.8GHz wireless network, the software radio equipment comprises front-end hardware equipment and a rear-end software module, the rear-end software module runsin the general computer, the front-end hardware equipment is connected with the rear-end software module by an universal serial bus 2.0 (USB2.0) technology. The general computer is connected with theCDMA network router for establishing the CDMA network. The general computer is connected with the VHF radio station simulator for establishing the VHF range wireless network. The experimental device ensures rich teaching contents and open experimental environment, and provides convenience for students to study and research various heterogeneous networks.
Description
Technical field
The present invention relates to a kind of experiment device for teaching, relate in particular to a kind of experiment device for teaching of the heterogeneous wireless network of building based on software and radio technique that differs greatly towards these 5 kinds of bandwidth of 400MHz, 5.8GHz, 2.4GHz, CDMA and VHF frequency range.
Background technology
Along with the promotion of development of wireless communication devices and various application, each radio band can be used to carry out radio communication, and the corresponding wireless network of different frequency range has bigger bandwidth difference, also presents different structure and characteristics.Such as, the bandwidth of the wireless network of 400MHz is often at hundreds of Kbit/s, the bandwidth of the wireless network of 2.4GHz then can reach tens Mbit/s, and the device of building the heterogeneous network of the wide difference of a kind of these strong bands of efficient connection becomes a kind of needs of the Web-based instruction and even network research.
But, existing towards the interconnected instructional device of heterogeneous network seldom, and the platform that uses interconnected based between the various isomery device gateway mostly, namely need be at different protocol configuration different accessing gateway equipments, equipment is various, realize complexity, can't satisfy purpose efficient interconnected and the heterogeneous network teaching; In addition, even if the platform that has has certain isomery characteristic, substantially also be the difference of different protocol standards on certain frequency range, such as IEEE802.11a/b/g, can not be called the heterogeneous network experimental provision with the wide difference characteristic of strong band.
A kind of software and radio technique has appearred in development and promotion along with hardware technology.This technology refers to adopt the general hardware platform, and the function by software realizes the function that original hardware can be realized.Originally the multiple IAD at different agreement that needs can realize that now unique different place is that we need write the software module at different agreement by a general hardware platform.Can not only reduce hardware device like this, and can also be in same gateway translation-protocol efficiently, greatly reduce the complexity of building the heterogeneous network device.
Because the network node of different frequency range has difference, at the application difference, so just need design at the multiple network node of multiple network agreement, equipment is various, realizes complexity.In addition, the high speed development of the network standard heterogeneous network device that also one of an urgent demand design can be efficiently interconnected.Consider factors such as cost and technology flexibility, the present invention is based on software and radio technique and build the heterogeneous network experimental provision with the wide difference characteristic of strong band.
Summary of the invention
Technical problem: the purpose of this invention is to provide a heterogeneous wireless network experimental provision with the wide difference characteristic of strong band.By this technology, experimental provision can reduce device category, thereby improves the experimental provision performance.
Technical scheme: the heterogeneous wireless network experimental provision with the wide difference characteristic of strong band of the present invention comprises 400MHz network node, 2.4GHz network node, 5.8GHz network node, cdma network node, VHF network node; Wherein, all-purpose computer A, all-purpose computer B are connected software radio equipment formation 400MHz wireless network node and networking respectively with all-purpose computer C; All-purpose computer B, all-purpose computer C, all-purpose computer D, all-purpose computer E are connected software radio equipment respectively with all-purpose computer F and constitute 2.4GHz wireless network node and networking; All-purpose computer E, all-purpose computer F are connected software radio equipment respectively with all-purpose computer G and constitute 5.8GHz wireless network node and networking; All-purpose computer A is connected the CDMA router respectively with all-purpose computer C and constitutes cdma network node and networking; All-purpose computer E is connected VHF radio station simulator respectively with all-purpose computer F and constitutes VHF wireless network node and networking; All-purpose computer B, all-purpose computer C, all-purpose computer D, all-purpose computer E, all-purpose computer F have realized the interconnected of heterogeneous network together with the software radio equipment that connects separately, CDMA router and the VHF radio station simulator gateway node as 400MHz wireless network, 5.8GHz wireless network, 2.4GHz wireless network, cdma network and these 5 kinds of networks of VHF wireless network.
Described software radio equipment is made up of front end hardware equipment and back end software module, front end hardware equipment comprises front radio-frequency module, ADC/DAC module, FPGA module, back end software module operates in the all-purpose computer, and front end hardware equipment links to each other by the USB2.0 technology with the all-purpose computer of operation back end software module.
Utilize this technology, only need to make up multiple heterogeneous network once the cover hardware platform.
Beneficial effect: the present invention utilizes software and radio technique structure universal nodes, and then builds the heterogeneous network device.By this technology, experimental provision can reduce device category, thereby improves the experimental provision performance and have following beneficial effect:
1, the content of courses is abundant.The present invention can comprise multiple heterogeneous network very easily, not only can study various wireless networks separately, can also study the network interconnection.Adopt modularized design, write corresponding module at the heterogeneous networks standard, can combination in any reduce, make things convenient for experimental design.
2, device is open.Based on software and radio technique, can effective compatible heterogeneous networks standard, adopt the modular software programming simultaneously, be convenient to add new network standard, be conducive to student's innovation simultaneously.
3, device flexible configuration.General gateway node can be used as the gateway node of any network standard, reduces heterogeneous network and builds difficulty, makes things convenient for network configuration simultaneously.
Description of drawings
Fig. 1 is heterogeneous network example integrated stand composition, comprise 2.4GHz wireless network, 400MHz wireless network, 5.8GHz wireless network, cdma wireless network and VHF frequency range wireless network, equipment comprise all-purpose computer, software radio equipment, CDMA router and VHF radio station simulator.Solid line is represented wired connection, and dotted line is represented wireless connections.
Fig. 2 is software radio equipment pie graph.Arrow is represented data flow.Equipment comprises front end hardware module and back end software module, and wherein back end software module runs on the all-purpose computer, and all-purpose computer is connected by USB2.0 with the front end hardware module.
Fig. 3 is the data flow figure of the interconnected example of heterogeneous network.Solid arrow is represented data flow, from the 400MHz wireless network to the 2.4GHz wireless network, VHF frequency range wireless network, 5.8GHz wireless network.
Fig. 4 is the data flow figure that closes the all-purpose computer B interconnected example of heterogeneous network afterwards.Solid arrow is represented data flow, from the 400MHz wireless network to the 2.4GHz wireless network, VHF frequency range wireless network, 5.8GHz wireless network.
Embodiment
The specific embodiment of the present invention is a heterogeneous network experimental provision, comprises 400MHz wireless network, 2.4GHz wireless network, 5.8GHz wireless network, cdma wireless network and VHF frequency range wireless network, and the experiment framework as shown in Figure 1.Equipment comprises all-purpose computer, software radio equipment and GNURadio software, CDMA router, VHF radio station simulator.Wherein all-purpose computer, software radio equipment and GNURadio software constitute a universal nodes (4OOMHz network node, 2.4GHz network node or 5.8GHz network node), software radio hardware is front end hardware equipment, and GNURadio is back end software module.Software radio hardware is made up of front radio-frequency module, ADC/DAC module, FPGA module again, back end software module operates on the all-purpose computer, by the wired standard transmission data of USB2.0, modular structure as shown in Figure 2 between software radio hardware and the all-purpose computer.
Specifically, this device consists of the following components as shown in Figure 1:
1,400MHz wireless network.Connect software radio equipment by all-purpose computer A, all-purpose computer B and all-purpose computer C and constitute bandwidth 200Kbit/s.
2,2.4GHz wireless network.Connect software radio equipment by all-purpose computer B, all-purpose computer C, all-purpose computer D, all-purpose computer E and all-purpose computer F and constitute bandwidth 11Mbit/s.
3,5.8GHz wireless network.Connect software radio equipment by all-purpose computer E, all-purpose computer F and all-purpose computer G and constitute bandwidth 200Kbit/s.
4, cdma wireless network.Be connected the CDMA router with all-purpose computer C with all-purpose computer A and constitute bandwidth 100Kbit/s.
5, VHF frequency range wireless network.Be connected VHF radio station simulator with all-purpose computer F by all-purpose computer E and constitute, bandwidth is 9.6Kbit/s.
The universal nodes of using in the present embodiment comprises front end hardware equipment and back end software module, and front end hardware equipment comprises front radio-frequency module, ADC/DAC module, FPGA module, and back end software module is implemented on the all-purpose computer, and its annexation as shown in Figure 2.The front radio-frequency module is responsible for receiving and is sent signal, and the ADC/DAC module is responsible for modulus/digital-to-analogue conversion, on the FPGA module is responsible for/preliminary high speed processing such as down-sampling, back end software module is further handled the complex signal that obtains.Be received as example with signal, the front radio-frequency module is passed through antenna receiving signal, and changes into intermediate frequency from high frequency, and the signal of intermediate frequency enters the FPGA module by the ADC sampling, and the complex signal down-sampling of FPGA to obtaining obtains baseband signal.By USB2.0 the baseband signal that obtains is transferred to all-purpose computer, the software module in the computer is handled baseband signal, makes different demodulation process at different standards and obtains data at last.The process that signal sends is similar with reception, and the data that will send are modulated by software module, send to front end FPGA module by USB2.0, and the interpolation up-sampling sends by front radio-frequency module and antenna at last.
The CDMA router that uses in the present embodiment and VHF radio station simulator technology comparative maturity do not repeat them here.
A specific embodiment of contrived experiment of the present invention is the all-purpose computer G that data is delivered to the 5.8GHz wireless network from the all-purpose computer A of 400MHz wireless network.Device architecture as shown in Figure 1.
Concrete experimental procedure is as follows:
1, network startup, the route initialization.
2, all-purpose computer A sends data.With hand certain sensor photosensitive position is covered, if light intensity value is lower than threshold value, then send the node serial number of this transducer to universal gateway node A.
3, all-purpose computer A sends to all-purpose computer B by the 400MHz frequency range with data.
4, all-purpose computer B sends to all-purpose computer D by the 2.4GHz frequency range with data.
5, all-purpose computer D sends to all-purpose computer E by the 2.4GHz frequency range with data.
6, all-purpose computer E sends to all-purpose computer F by VHF radio station simulator with data.
7, all-purpose computer F sends to all-purpose computer G by the 5.8GHz frequency range with data.
8, all-purpose computer G goes up the path that shows the packet process of receiving.
9, close all-purpose computer B, route recomputates.
10, all-purpose computer A sends to all-purpose computer C by the 400MHz frequency range with data.
11, all-purpose computer C sends to all-purpose computer D by the 2.4GHz frequency range with data.
12, all-purpose computer D sends to all-purpose computer E by the 2.4GHz frequency range with data.
13, all-purpose computer E sends to all-purpose computer F by VHF radio station simulator with data.
14, all-purpose computer F sends to all-purpose computer G by the 5.8GHz frequency range with data.
15, all-purpose computer G goes up the path that shows the packet process of receiving.
The data flow of this embodiment as shown in Figure 3 and Figure 4.
In addition, utilize heterogeneous network experiment porch of the present invention, we can also study the applicability of multiple network agreement under the heterogeneous wireless network environment that bandwidth differs greatly that comprises Routing Protocol, channel access control protocol.
By the description of above-mentioned execution mode, those skilled in the art can very clearly understand implementation of the present invention, also can very clearly understand the Experimental design process simultaneously.Above-described embodiment is used for the present invention that explains, rather than limits the invention, and in the protection range of claim of the present invention, any modification to the present invention makes all falls into protection scope of the present invention.
Claims (1)
1. heterogeneous wireless network experimental provision with the wide difference characteristic of strong band, it is characterized in that: this experimental provision comprises 400MHz network node, 2.4GHz network node, 5.8GHz network node, cdma network node, VHF network node;
Wherein, all-purpose computer A, all-purpose computer B are connected software radio equipment formation 400MHz wireless network node and networking respectively with all-purpose computer C; All-purpose computer B, all-purpose computer C, all-purpose computer D, all-purpose computer E are connected software radio equipment respectively with all-purpose computer F and constitute 2.4GHz wireless network node and networking; All-purpose computer E, all-purpose computer F are connected software radio equipment respectively with all-purpose computer G and constitute 5.8GHz wireless network node and networking; All-purpose computer A is connected the CDMA router respectively with all-purpose computer C and constitutes cdma network node and networking; All-purpose computer E is connected VHF radio station simulator respectively with all-purpose computer F and constitutes VHF wireless network node and networking; All-purpose computer B, all-purpose computer C, all-purpose computer D, all-purpose computer E, all-purpose computer F realize the interconnected of heterogeneous network together with the software radio equipment that connects separately, CDMA router and the VHF radio station simulator gateway node as 400MHz wireless network, 5.8GHz wireless network, 2.4GHz wireless network, cdma network and these 5 kinds of networks of VHF wireless network;
Described software radio equipment is made up of front end hardware equipment and back end software module, front end hardware equipment comprises front radio-frequency module, ADC/DAC module, FPGA module, the GNURadio back end software module operates in the all-purpose computer, and front end hardware equipment links to each other by the USB2.0 technology with the all-purpose computer of operation GNU Radio back end software module.
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| CN105307215A (en) * | 2014-05-29 | 2016-02-03 | 国家电网公司 | Software radio station network and communication control method thereof |
| CN112202679B (en) * | 2020-11-17 | 2022-05-10 | 中国人民解放军战略支援部队信息工程大学 | Hardware equipment quantification method and system for hierarchical network topology automatic routing distribution |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1883224A (en) * | 2003-10-02 | 2006-12-20 | 高通股份有限公司 | Systems and methods for multiplexing control information onto a physical data channel |
| CN102014036A (en) * | 2010-12-13 | 2011-04-13 | 南京大学 | Software wireless technology-based heterogeneous network experimental device |
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| US20050266880A1 (en) * | 2004-05-27 | 2005-12-01 | Gupta Vivek G | Open and extensible framework for ubiquitous radio management and services in heterogeneous wireless networks |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1883224A (en) * | 2003-10-02 | 2006-12-20 | 高通股份有限公司 | Systems and methods for multiplexing control information onto a physical data channel |
| CN102014036A (en) * | 2010-12-13 | 2011-04-13 | 南京大学 | Software wireless technology-based heterogeneous network experimental device |
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