CN101547464A - Wireless test system of virtual outfield - Google Patents
Wireless test system of virtual outfield Download PDFInfo
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- CN101547464A CN101547464A CN200810066224A CN200810066224A CN101547464A CN 101547464 A CN101547464 A CN 101547464A CN 200810066224 A CN200810066224 A CN 200810066224A CN 200810066224 A CN200810066224 A CN 200810066224A CN 101547464 A CN101547464 A CN 101547464A
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Abstract
The embodiment of the invention provides a wireless test system of a virtual outfield, which comprises a plurality of cells, a plurality of combiners, a plurality of attenuation matrixes, a multi-channel wideband channel simulator and a plurality of terminals; each attenuation matrix is connected with a part of the terminals, and then interconnects the part of the terminals with the cells through the combiners; and one of the attenuation matrix is in cascade connection with the multi-channel wideband channel simulator, and then interconnects the terminals connected with the attenuation matrix with the cells through the combiners. The wireless test system can simulate the environment of large-scale mobile communication networks, and improves the similarity degree with an actual mobile communication network.
Description
Technical field
The present invention relates to the communications field, particularly a kind of wireless test system of virtual outfield.
Background technology
In the wireless communication procedure of reality, network equipment and terminal communication will be commonly referred to as the radio open channel through the wireless propagation environment of eating dishes without rice or wine.The various channel circumstance complexity of eating dishes without rice or wine that causes of wireless propagation environment, when propagating, signal can be subjected to the influence of a lot of complicated factors aloft, as distance, landform, atural object or the like, and complicated like this wireless propagation environment can not move to indoor, realize that the laboratory build-in test can only carry out analogue simulation to it by professional equipment and technical solution, simulates the complex process of its radio signal propagation.
The virtual outer field technology of indoor establishment external field wireless test network by build nearly true outfield or the commercial mobile communication analog simulation platform of test network end to end in the laboratory, makes that test form and the result in the laboratory is similar to true outfield.This technology can remedy the defective of the scene structure of laboratory tests in the conventional chamber, and change internal field, automation configuration and automatic test by the outfield and realize high efficiency, technical advantage cheaply, also being to realize that large scale network comprises the effective method of the automatic test of eating dishes without rice or wine, is that the various tests that comprise the wireless performance test obtain high efficiency a kind of test Solution.
As shown in Figure 1, be the designed holder composition in an existing virtual outfield.Virtual outfield is by the propagated environment between substituting in the actual mobile communications network from the antenna for base station to the terminal, remove the channel circumstance of eating dishes without rice or wine, network element such as the network equipment and terminal all is an entity, and network scenarios derives from the equivalent scene behind real scene or its abstract analysis.
Characteristics such as virtual outer field technology has scene and makes up flexibly, and relative cost is low, its key problem in technology point is realization and the simulation process to the channel circumstance of eating dishes without rice or wine, and the structure of realizing nearly commercial test environment in the laboratory.Industry has the emulator or the solution of a lot of lists or multilink channel circumstance, but it is considerably less to possess the solution of the fairly large wireless network environment ability of simulation, can realize that solution that commercial ability simulates still less.
For the virtual outer field technology that a plurality of cell networkings are arranged, mainly realize by programmable adjustable damping matrix.As shown in Figure 2, be the damping matrix structural representation of one 8 * 8 (8IN8OUT) 64 passages.The input and output two ends are 1/8 mixers, and the device of mid portion is the adjustable attenuator module, can regulate and control the intensity of input signal, the slow fading process of simulation single-link (as communicating to connect of a sub-district and a terminal).Connect sub-district (can connect 8 sub-districts altogether) at input, connect terminal (can connect 8 tunnel terminals altogether) with these cell communications at output, the design feature of damping matrix makes each cell signal of 8 sub-districts can both arrive 8 tunnel terminals, signal strength signal intensity can be regulated and control fast, and every terminal signaling of 8 tunnel terminals can both arrive any one sub-district of 8 sub-districts, and signal strength signal intensity is also adjustable.Like this can all kinds of scenes of approximate simulation 8 tunnel terminals in 8 subzone networks, can realize multiple test events such as switching, covering.
As shown in Figure 3, be a kind of wireless test system of existing virtual outfield, can realize that 16 sub-districts and 1018 terminals are interconnected.
This system is made up of one 16 * 16 damping matrix, 16 sub-districts (CELL) and 1018 terminals.Terminal is closed signal in the connecting system of road by mixer, and per 8 terminals synthesize one the tunnel by one 1/8 mixer.
890 terminals of diagram lower part can not be done switching only as the terminal of scene background such as cell load, traffic, interference in this scheme.16 tunnel totally 128 terminals on diagram top, can and 16 sub-districts of CELL1～CELL16 realize interconnectedly entirely, these 128 terminals can produce actions such as a large amount of switchings, service call, termination, can do multiple KPI test by the grid of reference traffic model.All business procedures and control all realize by software.
But there are many technological deficiencies in this kind design, has reduced the fitness of itself and outfield, commercial network really degree:
(1) the abundant and actual scene terminal traffic model of terminal traffic pattern has more difference.In 890 background terminals, MS1～56 are by mixer level associating Lu Chengyi road signal, and this road signal only is connected on the sub-district, cell signal can only arrive on the terminal that mixer that this sub-district connects connects below, and the signal of MS1～56 also can only arrive on the CELL1 sub-district, these terminals can only connect a sub-district at most simultaneously so, can not switch etc. to stride the sub-district activity; 890 background terminals in platform to network performance influence far can not compare with its influence that is distributed in the real network to network performance.Because Lu Chengyi road signal is united by the mixer level in MS1～56, regulation and control are consistent to attenuation module to one tunnel signal strength signal intensity in addition, and the Move Mode of MS1～56 in network also can be just the same.
(2) shortage is to the simulation of network interferences.Most important influence is disturbed exactly in communication, a little less than the network interferences simulation capacity, directly influences the testability of platform.The background terminal of prior art only and the resident sub-district of terminal the link relation is arranged, do not have the adjacent area to disturb, terminal room disturbs invariable again, even not interference of terminal room, makes the network service process lack the flexibility of the complex transformations of real network.Such platform structure can not be done in the GSM network based on the channel allocation of disturbing (IBCA), in cdma system owing to do not consider the network interferences level, measure the telephone traffic and the actual form of coming and differ too big, can not characterize the actual performance that should show of network fully.
(3) lack the eat dishes without rice or wine real-time simulation ability of channel strong correlation such as rapid fading, Doppler, reduced the authenticity of radio open communication process.Damping matrix can only be simulated the slow fading process of signal communication process, and to the rapid fading process, the multipath of signal communication process, time delay can't characterize.
(4) scale can't be expanded.Prior art is the quantity of terminal extension in a large number, and is also limited for the extended capability of network cell quantity, and platform can not be to ultra-large network evolution.
(5) be that 8 sub-districts or 16 sub-districts all are difficult to the model corresponding to network plan simulation, the binding ability of such system and emulation planning software a little less than.Generally in cellular mobile communication networks planning, carry out emulation planning, because such network form has typicalness and analyticity with the network size of 21 sub-districts, 7 base stations, 27 sub-districts, 9 base stations, 57 sub-districts, 19 base stations, 75 sub-districts, 25 base stations.
(6) 890 background terminals and sub-district are connected and fixed, and movable property is poor in test process, can't be in test process the terminate load degree of each sub-district of dynamic-configuration.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of wireless test system of virtual outfield, and this wireless test system can be simulated the environment capacity of fairly large mobile communications network, promotes the similarity degree with actual mobile communications network.
A kind of wireless test system of virtual outfield, described system comprises: a plurality of sub-districts, many mixers, a plurality of damping matrix, multichannel broad-band channel emulation instrument and multi-section terminals, by mixer that this part terminal and sub-district is interconnected after each damping matrix links to each other with the part terminal, the terminal and the sub-district that will link to each other with described damping matrix by mixer behind the described multichannel broad-band channel of one of them the damping matrix cascade emulation instrument are interconnected.
The wireless test system in a kind of virtual outfield that the embodiment of the invention provides, adopt damping matrix and multichannel broad-band channel emulation instrument, can realize many base stations and fairly large terminal access capability, simulate the environment capacity of fairly large mobile communications network, and communication process can the artificial actual mobile communications network in the communication process of equal scale.
Description of drawings
Fig. 1 is the designed holder composition in existing virtual outfield;
Fig. 2 is the damping matrix structural representation of existing 64 passages;
Fig. 3 is the wireless test system in existing a kind of virtual outfield;
Fig. 4 is the embodiment of the invention 7 base stations 21 cell cellular structural representations;
Fig. 5 is the wireless test system in a kind of virtual outfield of the embodiment of the invention;
Fig. 6 is the structural representation of the every road of embodiment of the invention terminal.
Embodiment
The embodiment of the invention can be to 21 sub-districts, 7 base stations, 27 sub-districts, 9 stations, 57 sub-districts, 19 base stations, and the network model of many sub-districts, many base stations such as 75 sub-districts, 25 base stations carries out emulation.Below be that example describes with the network of 21 sub-districts, 7 base stations.
Figure 4 shows that the honeycomb schematic diagram of 21 sub-districts, 7 base stations.Figure 5 shows that a kind of wireless test system that comprises the virtual outfield of 21 sub-districts, 7 base stations.This system comprises sub-district 51, mixer 52, damping matrix 53, wideband channel simulation instrument (Channel simulator) 54 and terminal 55, and each device connects by the radio frequency cable.
Insert 21 sub-districts 51 in this system altogether, can realize 21 cell networkings.This system is provided with 52,21 21 * 20 damping matrixs 53 of 21 1/21 mixers and 1 21 passage broad-band channel emulation instrument 54, and has designed 420 tunnel user capacities of totally 2100 terminals that can move freely in network 55, and every road terminal comprises 5 terminals.Per 100 (20 tunnel) terminals 55 link to each other with a damping matrix 53, and interconnected by 21 1/21 mixers 52 and 21 sub-districts 51.Wherein, damping matrix 53 cascades 1 wideband channel simulation instrument, 54 backs interconnected by terminal 55 and sub-district 51 that mixer 52 will link to each other with this damping matrix 53, promptly, 100 terminals 55 (diagram test terminal part) cascade wideband channel simulation instrument 54, can realize the channel simulator test of various complexity, through the approaching truly communication process of the channel circumstance in outfield of the link communication process of these wideband channel simulation instrument 54 connections, can realize multipath, Doppler frequency shift and channel model arbitrarily, these 100 terminals 55 are also referred to as the test terminal; Other 2000 terminals 55 (diagram background terminal part) as the user context of network, make up the commercial network scene, are also referred to as the background terminal.
The use of background terminal is set up for creating similar commercial network user, because the terminal in the real network is not stop all to move in network in communication process, but most of terminal fixed location or low speed in communication process moves, and generally only relates to the link relation of several sub-districts.Though these background terminals are in the fixed location, but may a part of terminal be in the soft handover area, also may be in a plurality of cell edges, do not stop paying out and give birth to the table tennis switching, the frequency modulation that these terminals are not also being stopped in the GSM network, so these terminals except with its persistent district annexation being arranged, also need to be interconnected to simultaneously in the network other and this terminal has on the sub-district of direct link relation, the background terminal needs also that (M * N:M is the number of cells 4～32 of required connection by damping matrix; N is the terminal way 16～32 that needs connection) be connected on a plurality of sub-districts in the network.In the present embodiment, in order to prove absolutely the interconnectivity of terminal and network, the design background terminal is connected on the sub-district of network by 20 21 * 20 damping matrixs, but these background terminals can be undertaken interconnected by M * N damping matrix according to demand.The test terminal is by each sub-district in 21 * 20 complete interconnected mode access networks, to keep having in the network terminal that can do any activity of some.
In the present embodiment, 2100 terminals 55 are by in damping matrix 53 access networks, and per 20 tunnel terminals correspondence connects a damping matrix 53, and damping matrix 53 is controlled communication process by the regulation and control terminal 55 and the link signal power of minizone.Communicate as terminal MS 1 needs and sub-district CELL1, CELL2, suppose and be provided with an attenuation module V.att1 (figure does not show) between MS1 and the CELL1, be provided with an attenuation module V.att2 (figure does not show) between MS1 and the CELL2, attenuation module V.att1 and attenuation module V.att2 all are located in the damping matrix 53.When the link signal of MS1 and CELL1 stronger, and the link signal of MS1 and CELL2 a little less than, then by attenuation module V.att1 and V.att2 in the software adjustment control damping matrix, make the V.att1 pad value smaller, the V.att2 pad value is big.Attenuation module (V.att) can accuracy controlling to the particular level value, the link signal intensity of MS1 and CELL1, CELL2 just can be set to the respective objects value like this, correspondingly terminal just can be carried out corresponding change action by signal strength signal intensity or interference level, realizes the most basic mobile communication process.If the attenuation module V.att1 and the V.att2 that are provided with are few to the signals-modulating value difference, it is just similar that MS1 user receives the signal of sub-district CELL1, CELL2, and at this moment the MS1 terminal just has been in soft handover region.Equally, few as the signal difference of CELL1, CELL2, CELL3, CELL4 if the MS1 terminal receives a plurality of sub-districts, this moment, the MS1 terminal just was in the soft handover region of CELL1, CELL2, CELL3, four sub-districts of CELL4 so.
In the present embodiment, all terminals can be interconnected with any one sub-district in the network, can dynamically adjust community user dense degree and business model in test, and these terminals can freely be done real network Client-initiated exercises such as switching.Concentrate the congested situation, the great amount of terminals that pour in to several sub-districts to communicate by letter or the like such as a large number of users in soft handover area, only need be by turning down the pad value of the attenuation module of this terminal and this minizone in the damping matrix, heighten the pad value of the attenuation module of this terminal and other minizones in the damping matrix; Can strengthen terminal is connected link with Target cell signal strength signal intensity, reduce the signal strength signal intensity that is connected link of terminal and other non-Target cells.
5 terminals in that every road terminal inserts insert the sub-district owing to passing through one 1/5 mixer and a decay passage, every road terminal links basically identical, and correlation is too big and the practical communication effect is variant.As shown in Figure 6, present embodiment can also design the digital phase-shifting technique array, before every terminal, add several roads phase shifter 66, this counts the amplitude fluctuations rhythm that the road phase shifter is used to adjust different terminals, terminal signaling just is incorporated into signal in the mixer through at random phase shift adjustment, reduce the correlation of terminal room signal on the same mixer, thereby can further strengthen the authenticity of link.
The quantity that is appreciated that terminal 55 can change.
The quantity that is appreciated that background terminal and test terminal can change, and can be 1900 ones as the background terminal, and the test terminal can be 200 ones etc.
Not necessarily need with 21 sub-districts after being appreciated that per 100 terminals 55 and a damping matrix 53 linking to each other interconnected, itself and most of sub-district is interconnected gets final product, as 18 sub-districts.
The embodiment of the invention can reach following effect:
(1) the terminal traffic pattern is abundant, promoted the similitude of industry system to actual field testing emulation, in the laboratory, just can substitute the most of content measurement of outfield or Commercial deployment, finish 90% test volume, thereby can reduce outfield and the uncertain factor of Commercial deployment test process, shorten the test period of product greatly, and reduce testing cost.
(2) promote the similarity degree that virtual outfield platform network disturbs and actual mobile communications network disturbs, support all kinds of specification requirements disturbing based on disturbed test.The interference of mobile communication is mainly derived from network itself, and inter-user interference, presence of intercell interference are topmost interference.In the present embodiment, owing to inserted very many numbers of users, made up the offered load environment, and realized that interconnected link concerns, a large amount of inter-user interference and presence of intercell interference have been realized, noise in the network can be suitable with the noise of real network environment, thus can realize the frequency hopping test of irrealizable GSM in the prior art, based on channel allocation (IBCA) test of disturbing etc.
(3) increase the real-time simulation ability of virtual outfield platform to the channel of eating dishes without rice or wine.
(4) support typical honeycomb networking configuration, the convenient butt joint that realizes virtual outfield platform and network simulation planning software.
(5) flexible expansion background terminal quantity, every terminal can produce the link relation with the several even whole sub-districts in the network, and up-downgoing interference and live network differ little.
In sum, in embodiments of the present invention, wireless test system can be realized many base stations and fairly large terminal access capability, simulates the environment capacity of fairly large mobile communications network, and communication process can the artificial actual mobile communications network in the communication process of equal scale.
In sum, more than only be displaying to spirit of the present invention, but not be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1, a kind of wireless test system of virtual outfield, it is characterized in that, described system comprises: a plurality of sub-districts, many mixers, a plurality of damping matrix, multichannel broad-band channel emulation instrument and multi-section terminals, by mixer that this part terminal and sub-district is interconnected after each damping matrix links to each other with the part terminal, the terminal and the sub-district that will link to each other with described damping matrix by mixer behind the described multichannel broad-band channel of one of them the damping matrix cascade emulation instrument are interconnected.
2, the wireless test system in virtual outfield as claimed in claim 1, it is characterized in that, described sub-district has 21, described terminal has 2100 ones, comprise 2000 background terminals and 100 test terminals, wherein, per 100 background terminals link to each other by the radio frequency cable with 1 damping matrix, and it is interconnected by mixer and 21 sub-districts, 100 test terminals and 1 damping matrix be by the radio frequency cable described multichannel broad-band channel of the back cascade emulation instrument that links to each other, and interconnected by mixer and sub-district.
As the wireless test system in claim 1 or 2 each described virtual outfields, it is characterized in that 3, described damping matrix has 21 21 * 20 damping matrixs.
As the wireless test system in claim 1 or 2 each described virtual outfields, it is characterized in that 4, described multichannel broad-band channel emulation instrument is 21 passage broad-band channel emulation instruments.
5, the wireless test system in virtual outfield as claimed in claim 1 is characterized in that, described system also comprises several roads phase shifter, and described several roads phase shifter is used to adjust the amplitude fluctuations rhythm of different terminals, and it links to each other with terminal.
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| CN2008100662247A CN101547464B (en) | 2008-03-28 | 2008-03-28 | Wireless test system of virtual outfield |
| PCT/CN2009/070864 WO2009117926A1 (en) | 2008-03-28 | 2009-03-18 | Virtual field wireless test system |
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| CN2008100662247A CN101547464B (en) | 2008-03-28 | 2008-03-28 | Wireless test system of virtual outfield |
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| CN101547464B CN101547464B (en) | 2011-01-12 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103795480A (en) * | 2014-01-27 | 2014-05-14 | 中国电子科技集团公司第十研究所 | Multi-channel networking test device of directional communication system |
| CN103997430B (en) * | 2014-05-04 | 2017-05-24 | 中国电子科技集团公司第十研究所 | Laboratory verification test method for directional communication networking capability |
| CN108271201A (en) * | 2016-12-30 | 2018-07-10 | 联芯科技有限公司 | The mobility method for testing pressure and device of wireless terminal |
| CN110875789A (en) * | 2018-08-29 | 2020-03-10 | 大唐移动通信设备有限公司 | Multi-antenna platform capability test method and device |
| CN113162708A (en) * | 2020-01-22 | 2021-07-23 | 南京捷希科技有限公司 | Large-scale terminal simulation system and test method |
Families Citing this family (2)
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| US9143961B2 (en) * | 2010-07-02 | 2015-09-22 | T-Mobile Usa, Inc. | Switching matrix and test platform |
| CN105554783B (en) * | 2014-11-03 | 2021-05-18 | 中兴通讯股份有限公司 | Air interface test device, system and air interface test method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2003077060A2 (en) * | 2002-03-04 | 2003-09-18 | Azimuth Networks, Inc. | Test system for simulating a wireless environment and method of using same |
| CN100464602C (en) * | 2003-09-18 | 2009-02-25 | 鼎桥通信技术有限公司 | Testing device for mobile communication equipment |
| CN100382626C (en) * | 2004-10-27 | 2008-04-16 | 中兴通讯股份有限公司 | Mobile communication base station testing system |
-
2008
- 2008-03-28 CN CN2008100662247A patent/CN101547464B/en active Active
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2009
- 2009-03-18 WO PCT/CN2009/070864 patent/WO2009117926A1/en active Application Filing
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795480A (en) * | 2014-01-27 | 2014-05-14 | 中国电子科技集团公司第十研究所 | Multi-channel networking test device of directional communication system |
| CN103795480B (en) * | 2014-01-27 | 2016-04-27 | 中国电子科技集团公司第十研究所 | Beam system multichannel networking testing apparatus |
| CN103997430B (en) * | 2014-05-04 | 2017-05-24 | 中国电子科技集团公司第十研究所 | Laboratory verification test method for directional communication networking capability |
| CN108271201A (en) * | 2016-12-30 | 2018-07-10 | 联芯科技有限公司 | The mobility method for testing pressure and device of wireless terminal |
| CN110875789A (en) * | 2018-08-29 | 2020-03-10 | 大唐移动通信设备有限公司 | Multi-antenna platform capability test method and device |
| CN110875789B (en) * | 2018-08-29 | 2021-01-26 | 大唐移动通信设备有限公司 | Multi-antenna platform capability test method and device |
| CN113162708A (en) * | 2020-01-22 | 2021-07-23 | 南京捷希科技有限公司 | Large-scale terminal simulation system and test method |
| CN113162708B (en) * | 2020-01-22 | 2024-03-15 | 南京捷希科技股份有限公司 | Large-scale terminal simulation system and test method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101547464B (en) | 2011-01-12 |
| WO2009117926A1 (en) | 2009-10-01 |
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