CN103138855B - A kind of radio network information channel analog based on outfield measured data and method - Google Patents
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Abstract
The present invention provides a kind of method and apparatus building radio network information channel simulated environment at laboratory, the method includes: gather each base station and the channel fading data of each user terminal in wireless network, and each channel fading data are analyzed, form channel parameter required during channel simulation；When one scene is carried out channel simulation, receive, according to the scene of simulation, the signal that respective base station antenna sends, and export from corresponding output port after the signal received being carried out channelizing process by the ginseng number of channel corresponding to this scene.Use technical solution of the present invention, both in base band, signal can be processed, rf data can also be processed, the slow fading of outer field signal can either be simulated, can also simulating multi-path rapid fading, and the channel simulation of network level can be provided, and all derive from real external field environment for the channel script of simulation, so the most real actual external field environment can be simulated, reach to can be realized as at laboratory the purpose of field testing.
Description
Technical field
The present invention relates to field of wireless communication, particularly relate to analog and the method for the outfield radio network information channel of complexity.
Background technology
The propagation properties of wireless channel is relevant with communication environments (geographical feature, building, electromagnetic interference, employing frequency range etc.), general, it is considered that wireless channel has large scale decline and two kinds of features of multipath fading, wherein large scale decline features mobile station and moves through relatively large distance and the decay of average received signal power that causes or path loss, has two influence factors: path loss and shadow fading.Path loss refers to electric wave propagation loss spatially；Shadow fading refers to that electric wave runs into the obstruct of tall and big barrier in communication process and can produce the shadow region of electromagnetic field, when mobile station is through shadow region, and can the change of priming signal median of field strength；Generally, direct signal is there is not between base station and mobile station, the signal received usually launch signal through diffraction several times, scatter, reflect, transmission, superposed signal after refraction, the phenomenon that this signal reaches receiving terminal through different propagation paths is referred to as multipath transmisstion.Multipath transmisstion causes the broadening of signal waveform, produces frequency selective fading；Doppler effect affects the time-varying characteristics of channel, and the Doppler frequency deviation produced because of translational speed causes signal spectrum to spread in certain scope, produces time selective fading.This multipath fading can cause the power fading of signal tens dB.Meanwhile, radio network information channel is also affected by various electromagnetic interference and the affecting of co-channel interference in networking.
This complexity of radio network information channel and time variation configure to wireless network planning and systematic parameter and add difficulty so that system test cannot cover the various complex scenes in actual application.Wireless telecommunications system (such as base station, terminal) is after laboratory development completes property indices test, need in actual wireless channel circumstance, carry out network test, in order to verify stability and the Maturity of wireless telecommunications system, it is generally required to open up fairly large Pilot office, with the checking network planning and the reasonability of system parameter setting, abundant exposing product defect in actual applications.This checking and test mode construction cycle are longer, and put into relatively big, are unfavorable for quickly verifying the commercial ability of wireless product.
In the prior art, one of them proposes a kind of radio channel simulating method and device, baseband signal can carry out multipath fading process, but it can not process the slow fading of signal, can not process signal at radio frequency；Another prior art proposes system for testing multi-path fading and the method for testing thereof of mobile terminal in a kind of mobile communication network, and its feature is to measure radio network information channel, but is not relevant for the channel characteristics measured；A prior art is also had to propose a kind of mimo channel analog, this device considers the decline in time and frequency and space selective fading simultaneously, hyperspace parameter can be simulated, but it is only theoretical parameter, and simulation calculates, and real external field environment has bigger difference.
Comprehensive prior art, is divided into soft simulation and hard emulation two kinds by the simulation of wireless channel.Wherein soft simulation channel model based on industry classics, is simulated approximation to wireless channel by the way of mathematical modeling, has a disadvantage in that these channel models are only the modeling to classic applications scene, it is impossible to the multiformity of real reproduction channel and complexity；Firmly emulate based on radio channel simulator, radio channel simulator can produce channel parameter according to channel model, the collection data of actual channel can also be downloaded, this mode has preferable simulated effect to point-to-point wireless channel simulation, but it is poor to the simulation capacity of radio network information channel, multiple radio channel simulator is typically used to cascade (as shown in Figure 1), owing to channel simulator volume is bigger, in addition the stationary problem between signal, even if cascade also can only realize the network analog of little scope.
Summary of the invention
In order to solve the problems referred to above, the present invention proposes a kind of method and apparatus building radio network information channel simulated environment at laboratory, utilize the data gathered from actual channel environment, base station to laboratory, signal between mobile station group is simulated external field environment and processes, by the control to channel script, single antenna can be realized flexibly, various interference simulations test under multiple antennas (MIMO:multipleinputmultipleoutput) channel and complex network environment, the channel circumstance that optimal coupling outfield is actual, virtual wireless network environmental testing is built at laboratory, the performance of assessment system product, play the test function of sweeping experiment office.
It is an object of the invention to, the method and apparatus that radio network information channel in a kind of laboratory is simulated is proposed, by the channel data collection to real network environment, at Laboratory Restructuring the genuine property that reflects actual outfield wireless network, build virtual wireless network environmental testing, the performance of assessment system product.
The present invention provides a kind of radio network information channel analogy method based on outfield measured data, including:
Gather each base station and the channel fading data of each user terminal in wireless network, and each channel fading data are analyzed, form channel parameter required during channel simulation；When one scene is carried out channel simulation, receive, according to the scene of simulation, the signal that respective base station antenna sends, and export from corresponding output port after the signal received being carried out channelizing process by the ginseng number of channel corresponding to this scene.
Further, before the signal received is carried out channelizing process, generate corresponding test script according to the scene that need to simulate, including input script, output script and channel script；
Described input script refers to base station number and day wire size needing to use under current scene；
Described output script is one group of terminal under current scene and sky wire size；
The described i.e. channel parameter of channel script, including declining slowly, each multipath declines soon, each relative time delay declined soon.
Further, described method also includes: receive, according to input script, signal the base band data of antenna alignment order buffer reception that respective base station antenna sends.
Further, if the radiofrequency signal that the antenna for base station received sends, then cache after described radiofrequency signal is converted to base band data.
Further, described to receive signal carry out channelizing process refer to:
Signal and the channel parameter of correspondence of caching is read, then according in the following manner carries out computing according to input script:
It is multiplied by decline slowly with base band data and is worth to W1, then W1 it is multiplied by respectively by each footpath value that declines soon, it is provided with n the value that declines soon, the most each value that declines soon is all multiplied with W1 and obtains W21, W22...W2n, then, corresponding W2i is done time delay processing respectively obtain W31, W32...W3n by each footpath time delay that declines soon, be finally overlapped W31, W32...W3n processing；
Described 1≤i≤n.
Further, described will process after signal refer to from corresponding output port output: according to output script, the signal after processing is from corresponding terminal prot output.
The present invention also provides for a kind of radio network information channel analog based on outfield measured data；
Described device includes that the management of channel script controls backstage, channelizing processing module, input base band control module and output base band control module；
The management of described channel script controls backstage, is analyzed for the channel data gathering the outfield received, obtains channel parameter required during channel simulation；
Described input base band control module, for receiving the base band data of antenna for base station transmission and caching；
Described channelizing processing module, for reading base band data and the channel parameter of correspondence of corresponding scene, the signal after transmission processes after base band data being carried out channelizing process according to described channel parameter is to output base band control module；
Described output base band control module, the signal output after processing is to corresponding terminal prot.
Further, described device also includes that channel data classification issues module, extracts corresponding channel parameter for the scene according to simulation and forms test script；
Described test script includes inputting script, output script and channel script；
Described input script refers to base station number and day wire size needing to use under current scene；
Described output script is one group of terminal under current scene and sky wire size；
The described i.e. channel parameter of channel script, including declining slowly, each multipath declines soon, each relative time delay declined soon；
The classification of described channel data issues module and is additionally operable to be issued to input script input base band control module, is issued to output script export script control module, and channel script is issued to channelizing processing module.
Further, described device also includes radio frequency processing module, sends to input base band control module after the radiofrequency signal that the antenna for base station of reception sends is converted to base band data.
Further, base band data caching that described input base band control module reception antenna for base station sends refer to: the signal that input base band control module sends according to input script reception respective base station antenna, and according to the signal of antenna orderings order buffer reception.
Further, described channelizing processing module carries out channelizing process and refers to: channelization block reads base band data and the channel parameter of correspondence of caching, it is multiplied by decline slowly with base band data and is worth to W1, then W1 it is multiplied by respectively by each footpath value that declines soon, being provided with n the value that declines soon, the most each value that declines soon is all multiplied with W1 and obtains W21, W22...W2n, then, corresponding W2i is done time delay processing respectively obtain W31, W32...W3n by each footpath time delay that declines soon, be finally overlapped W31, W32...W3n processing；
Described 1≤i≤n.
Further, the terminal prot of the signal output extremely correspondence after described output base band control module will process refers to: result is exported from corresponding terminal prot by output base band control module according to output script.
Compared with prior art, the radio network information channel analog that the present invention proposes has the advantage that supports point-to-point emulation (single-input single-output situation) and network level emulation (multiple-input and multiple-output situation) simultaneously；Both in base band, signal can be processed, rf data can also be processed, the slow fading of outer field signal can either be simulated, can also simultaneously simulating multi-path rapid fading, and the channel simulation of network level can be provided, and the channel script for simulation all derives from real external field environment, so the most real can be simulated actual external field environment, reaches to can be realized as at laboratory the purpose of field testing.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that in prior art, channel simulator builds wireless network；
Fig. 2 is the structural representation of radio network information channel analog of the present invention；
Fig. 3 is the flow chart of network channel simulation in the inventive method embodiment；
Fig. 4 is that in the embodiment of the present invention, channel parameter matrix represents intention；
Fig. 5 is that in the embodiment of the present invention, channelizing processes structure chart；
Fig. 6 is point-to-point channel simulation exemplary plot in application example one of the present invention and application example two；
Fig. 7 is the wireless network architecture schematic diagram in application example three of the present invention.
Detailed description of the invention
The present invention provides a kind of radio network information channel analog based on outfield measured data and method, gathers each base station and the channel fading data of each user terminal in wireless network, and is analyzed each channel fading data, forms parameter required during channel simulation；When one scene is carried out channel simulation, receive, according to the scene of simulation, the signal that respective base station antenna sends, and the signal received carried out after channelizing process from corresponding output port output by parameter corresponding to this scene.
Device embodiment
The basic structure of radio network information channel analog of the present invention is as shown in Figure 2, control backstage including the management of channel script, channel data classification issues module, channelizing processing module, input base band control module, export base band control module and radio frequency processing module composition, and wherein the function of each several part is expressed as follows:
The management of channel script controls backstage (such as computer, server etc.): for analyzing the channel data of outfield channel data collection system acquisition, determine the power delay profile of multipath channel, angular power Spectral structure, channel space correlation, large scale fading characteristic etc., it is concrete large scale fading parameter and multipath fading parameter group by outfield actual channel network abstraction, large scale fading parameter is to be smoothed the data collected, and then extracts its amplitude characteristic；Multipath fading is exactly the characteristics such as the frequency according to signal, isolates its channel multi-path component, the power then extracted and delay information.I.e. produce the data combination of rapid fading and the slow fading parameter that can characterize actual channel.
Channel data classification issues module: the needs (i.e. according to the scene the being currently needed for simulation) data that backstage produces processed according to present channel generate test script, including input script (i.e. input controls parameter), output script (i.e. output controls parameter) and channel script (i.e. channel parameter)；And be issued to respectively input base band control module, output base band control module and channelizing processing module by input script, output script and channel script；Wherein, input script is base station number and day wire size needing under current scene to use；Output script is one group of UE under current scene and sky wire size；Channel script includes declining slowly, the parameter such as each multipath declines soon, each relative time delay declined soon.
Input base band control module, for the antenna for base station data needed for the input extracting data received of the input script according to caching, and arrange according to antenna requirement and cache, i.e. according to the scene being actually subjected to simulation, select the base band data that the antenna in base station involved by this scene sends, the data sent by each antenna store to different relief areas respectively for channel processing module, such as certain scene relates to base station 1, base station 2 and base station 4, and base station 1 comprises antenna 1, base station 2 comprises antenna 1 and antenna 2, base station 4 comprises antenna 3, the base band data order that these 4 antennas are sent by input base band control module lines up 1234.
Channelizing processing module: control parameter according to input and read the base band data of respective antenna in corresponding relief area in real time, reads channel parameter corresponding to current scene simultaneously and carries out computing, and send operation result to output base band control module；
Specifically, computing mode is: is multiplied by decline slowly with base band data and is worth to W1, then W1 it is multiplied by respectively by each footpath value that declines soon, if any n the value that declines soon, the most each value that declines soon is all multiplied with W1 and obtains W21, W22...W2n, then, corresponding W2i is done time delay processing respectively obtain W31, W32...W3n by each footpath time delay that declines soon, be finally overlapped W31, W32...W3n processing.
Output base band control module, according to actual scene when being used for exporting, on the antenna of the UE that the operation result of reception is exported correspondence, will be on the antenna of the UE that exports correspondence of antenna signal after Channel Processing involved by scene.
Radio frequency processing module, for when base station and UE exist radio frequency part radiofrequency signal need to be processed time, send to input base band control module after the radiofrequency signal that the antenna for base station of reception sends is converted to baseband signal；When being additionally operable to send, convert baseband signals into radiofrequency signal and send into UE.
If base station and UE only have baseband portion, then this device can pass through fiber direct connection, directly in baseband portion and base station and UE communication.
Embodiment of the method
Radio network information channel analog of the present invention realize step as it is shown on figure 3, detailed process is:
Step S1, gathers each base station and the channel fading data of each user terminal (or channel collecting device) in actual wireless network, and the moving line of user terminal to cover whole wireless network environment as far as possible, and acquisition time wants long enough；
Step S2, is analyzed processing to the channel data after gathering, obtains every channel parameter required during Channel Processing.
For each channel data, it is preferable channel parameter by outfield actual channel data abstraction, is declined slowly, the parameter such as each multipath declines soon, each relative time delay declined soon；Specifically, for large scale fading characteristic, need the impact that data are smoothed eliminates interference noise, then extract its amplitude characteristic；For multipath fading feature, according to characteristics such as the frequencies of signal, need to separate channel multi-path component, extract power-delay information, be finally fabricated to a channel parameter matrix table, as shown in Figure 4.
Step S3: generate test script according to the scene that currently need to simulate, and sort data into and issue；
Specifically, according to the scene currently need to simulated, corresponding data genaration test script is extracted, including input script (i.e. input controls parameter), output script (i.e. output controls parameter) and channel script (i.e. channel parameter) from backstage；And be issued to respectively input base band control module, output base band control module and channelizing processing module by input script, output script and channel script；Wherein, input script is base station number and day wire size needing under current scene to use；Output script is one group of UE under current scene and sky wire size；Channel script includes declining slowly, the parameter such as each multipath declines soon, each relative time delay declined soon.Then it is issued to input script input base band control module, is issued to output script export base band control module, channel script is issued to channelizing processing module.
As shown in Figure 4, on the right side of perpendicular row base station, corresponding numbering is input slogan, walks crosswise numbering corresponding on the downside of UE and is outfan slogan.H-number corresponding in the middle of table indicates the channel value under corresponding input-output mappings relation, and each H-number all includes that the declining slowly of this channel data, multipath are declined and decline soon the time delay of correspondence soon.This part final can be by input number, output number, and decline value slowly, the value that declines soon in each footpath, and the time delay that declines soon is stored in different bufferings buffer respectively, reads when waiting Channel Processing.
Step S4: receive the signal sent of respective base station antenna according to input script and store；Specifically, antenna for base station port is determined according to input script, then the signal that this port sends is received, if receive is radiofrequency signal, store after the most first radiofrequency signal is converted to baseband signal, if receive is baseband signal, directly store, the antenna alignment sequential storage specified according to input script during storage.
Step S5: the signal after output processes after channelizing process.As it is shown in figure 5, this part is the core of this device, specifically comprise the following steps that
First, read the input data of relief area storage, and read corresponding channel script (i.e. channel parameter), then according to channel parameter, input data are carried out computing；Operation method is: is multiplied by decline slowly with base band data and is worth to W1, then W1 it is multiplied by respectively by each footpath value that declines soon, if any n the value that declines soon, the most each value that declines soon is all multiplied with W1 and obtains W21, W22...W2n, then, corresponding W2i is done time delay processing respectively obtain W31, W32...W3n by each footpath time delay that declines soon, be finally overlapped W31, W32...W3n processing；
Finally, according to output script, the data after channelizing being processed send into corresponding output port.
Further,
If the test script that current scene needs is real-time change, then needs to generate in real time according to current scene test script, and according to the signal of test script reception correspondence and the channel parameter of reading correspondence, signal is processed.
Name several embodiments so that some typical case's applicable cases of the present invention to be described:
Application example one: point-to-point channel simulation.
As shown in Figure 6, in the case of only one of which base station and a UE, the transmitting antenna transmission rf data of this base station is to eating dishes without rice or wine, and the rf data received is converted into base band data by the radio frequency unit of this equipment, sends into input base band control module；Then, needs according to test, choose the H-number that under corresponding scene, required antenna for base station port and terminal prot are formed, this H-number composition test script is controlled backstage from the management of channel script, issue module by channel data classification, resolve into input script, output script and channel script, and it is respectively fed to input base band control module, output base band control module and channelizing processing module；Above-mentioned data, according to above-mentioned Channel Processing algorithm, are carried out comprehensive computing by channelizing processing module, are then output to radio frequency processing module, are finally sent to eat dishes without rice or wine；Finally, UE have received the data processed through channelizing.By controlling the change of background script, the channel situation under several scenes can be simulated.
Application example two: the channel simulation of baseband signal.
As shown in Figure 6, base station or UE be not having radio-frequency apparatus when, it is also possible to is simulated test by the radio network information channel analog of the present invention；At this moment, the radio frequency unit of the present invention can be bypassed, and the baseband signal of base station and the input baseband processing module of the present invention take the mode of fiber direct connection to be attached；Same output baseband processing module and the UE without radio frequency are also adopted by the mode of fiber direct connection and are attached.Same, it is also possible to by the channel variance situation of background script change modeling several scenes.
Wireless network simulation in the case of the UE of application example three: three community two.
As shown in Figure 7, in the case of three base stations and two UE, the transmitting antenna of these three base station sends rf data to eating dishes without rice or wine, the rf data received is converted into base band data by the radio frequency unit of this equipment, send into input base band control module, base band control module is numbered sequence, base station 1, base station 2, base station 3 to the base band data entered according to certain rule；Then, according to the needs of test, certain test script is controlled backstage from the management of channel script, issue module by channel data classification, resolve into input script, output script and channel script, and it is respectively fed to input base band control module, output base band control module and channelizing processing module；Different base station signal combinations, according to the change of the input number of script, is input to channel processing module in the different time by input processing module；Above-mentioned data, according to above-mentioned Channel Processing algorithm, are carried out comprehensive computing by channelizing processing module, send into output baseband processing module；Output baseband processing module exports number data that will process according to script, through radio frequency processing module, is sent to eating dishes without rice or wine of correspondence；Finally, each UE have received a base station or the data that processed through channelizing of several base station of correspondence.By controlling the change of background script, two UE various scenes under 3 base station networks can be simulated, switch including community, face district's interference variations, the comp etc. that cell edge strengthens.
Finally, it is noted that the above-mentioned description for preferred embodiment of the present invention is more concrete, therefore can not be considered limiting the scope of the invention, protection scope of the present invention should be as the criterion with claims.
Claims (11)
1. a radio network information channel analogy method based on outfield measured data, including:
Gather each base station and the channel fading data of each user terminal in wireless network, and each channel fading data are analyzed, form channel parameter required during channel simulation；When one scene is carried out channel simulation, receive, according to the scene of simulation, the signal that respective base station antenna sends, and the signal received carried out after channelizing process from corresponding output port output with channel parameter corresponding to this scene；
Before the signal received is carried out channelizing process, generate corresponding test script according to the scene that need to simulate, including input script, output script and channel script；
Described input script refers to base station number and day wire size needing to use under current scene；
Described output script is one group of terminal under current scene and sky wire size；
The described i.e. channel parameter of channel script, including declining slowly, each multipath declines soon, each relative time delay declined soon；
Described method also includes: receives the base band data of antenna for base station transmission and caches.
2. the method for claim 1, it is characterised in that:
Described method also includes: receive, according to input script, signal the base band data of antenna alignment order buffer reception that respective base station antenna sends.
3. the method for claim 1, it is characterised in that described method also includes:
If the radiofrequency signal that the antenna for base station received sends, then cache after described radiofrequency signal is converted to base band data.
4. method as claimed in claim 2 or claim 3, it is characterised in that:
The described signal to receiving carries out channelizing process and refers to:
Signal and the channel parameter of correspondence of caching is read, then according in the following manner carries out computing according to input script:
It is multiplied by decline slowly with base band data and is worth to W1, then W1 it is multiplied by respectively by each footpath value that declines soon, it is provided with n the value that declines soon, the most each value that declines soon is all multiplied with W1 and obtains W21, W22 ... W2n, then, corresponding W2i is done time delay processing respectively obtain W31, W32 by each footpath time delay that declines soon ... W3n, finally to W31, W32 ... W3n is overlapped processing；
1≤i≤n。
5. method as claimed in claim 2 or claim 3, it is characterised in that:
Signal after processing refers to from corresponding output port output: according to output script, the signal after processing is from corresponding terminal prot output.
6. a radio network information channel analog based on outfield measured data, it is characterised in that:
Described device includes that the management of channel script controls backstage, channelizing processing module, input base band control module and output base band control module；
The management of described channel script controls backstage, is analyzed for the channel data gathering the outfield received, obtains channel parameter required during channel simulation；
Described input base band control module, for receiving the base band data of antenna for base station transmission and caching；
Described channelizing processing module, for reading base band data and the channel parameter of correspondence of corresponding scene, the signal after transmission processes after base band data being carried out channelizing process according to described channel parameter is to output base band control module；
Described output base band control module, the signal output after processing is to corresponding terminal prot；
Described device also includes that channel data classification issues module, extracts corresponding channel parameter for the scene according to simulation and forms test script；
Described test script includes inputting script, output script and channel script；
Described input script refers to base station number and day wire size needing to use under current scene；
Described output script is one group of terminal under current scene and sky wire size；
The described i.e. channel parameter of channel script, including declining slowly, each multipath declines soon, each relative time delay declined soon.
7. device as claimed in claim 6, it is characterised in that:
The classification of described channel data issues module and is additionally operable to be issued to input script input base band control module, is issued to output script export script control module, and channel script is issued to channelizing processing module.
8. device as claimed in claim 6, it is characterised in that:
Described device also includes radio frequency processing module, sends to input base band control module after the radiofrequency signal that the antenna for base station of reception sends is converted to base band data.
9. device as claimed in claim 7 or 8, it is characterised in that:
Base band data caching that described input base band control module reception antenna for base station sends refer to: the signal that input base band control module sends according to input script reception respective base station antenna, and according to the signal of antenna orderings order buffer reception.
10. device as claimed in claim 7, it is characterised in that:
Described channelizing processing module carries out channelizing process and refers to: channelization block reads base band data and the channel parameter of correspondence of caching, it is multiplied by decline slowly with base band data and is worth to W1, then W1 it is multiplied by respectively by each footpath value that declines soon, it is provided with n the value that declines soon, the most each value that declines soon is all multiplied with W1 and obtains W21, W22 ... W2n, then, corresponding W2i is done time delay processing respectively obtain W31, W32 by each footpath time delay that declines soon ... W3n, finally to W31, W32 ... W3n is overlapped processing；
1≤i≤n。
11. devices as claimed in claim 7, it is characterised in that:
Signal output after described output base band control module will process refers to corresponding terminal prot: output base band control module according to output script by result from corresponding terminal prot output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210037012.2A CN103138855B (en) | 2011-11-29 | 2012-02-17 | A kind of radio network information channel analog based on outfield measured data and method |
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| CN201110387394 | 2011-11-29 | ||
| CN201110387394.7 | 2011-11-29 | ||
| CN2011103873947 | 2011-11-29 | ||
| CN201210037012.2A CN103138855B (en) | 2011-11-29 | 2012-02-17 | A kind of radio network information channel analog based on outfield measured data and method |
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| CN103138855A CN103138855A (en) | 2013-06-05 |
| CN103138855B true CN103138855B (en) | 2016-08-03 |
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