CN102790990B - Method for indoor wireless network information channel simulation and device thereof - Google Patents
Method for indoor wireless network information channel simulation and device thereof Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B17/00—Monitoring; Testing
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- H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
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Abstract
Provided are a method for indoor wireless network information channel simulation and a device thereof. The method particularly comprises generating an information channel characteristic script according to a topological graph of an indoor wireless network information channel simulation system and collected information channel data files; downloading the information channel characteristic script to an information channel processing unit and a base band route module and launching a starting instrument; and enabling the information channel processing unit to conduct point-to-point channelizing processing on each input base band datum according to an information channel characteristic table of the information channel characteristic script, overlying processing results, obtaining the base band data for sending to a base station or user equipment (UE), and enabling the base band route module to route on the base band data according to routing information of the information channel characteristic script.
Description
Technical field
The present invention relates to the simulation of field of wireless communication radio network information channel, particularly relate to the lower complicated network channel analogy method of multichannel interaction and device thereof.
Background technology
In wireless channel, electric wave propagation is not single-pathway, but the synthesis of numerous reflected waves in many paths.Because electric wave is different by the distance in each path, the reflected wave that thus each path is next is different for the time of advent, and namely the time delay of each signal is different.When transmitting terminal sends an extremely narrow pulse signal, the signal that travelling carriage receives is made up of the pulse of many different delay, and we are called delay spread.
Simultaneously due to the reflected wave difference time of advent that each path is come, phase place is also just different.Multiple signals of out of phase at receiving terminal superposition, superposition and strengthen (direction is identical) sometimes, sometimes superposition and weakening (direction is contrary).Like this, the amplitude of Received signal strength will sharply change, and namely create rapid fading.This decline is caused by multiple path, so be called multipath fading.
In addition, Received signal strength is except there is rapid fading in instantaneous value, and median of field strength (mean value) also there will be slow change.Mainly changed by the change of zone locations and meteorological condition and cause, so that the refraction of electric wave is propagated and changed in time and change, the time delay that multipath transmisstion arrives the signal of fixed reception point changes thereupon.This signal intensity caused by shadow effect and meteorological reason, is called slow fading.
Due to the mobility of travelling carriage in mobile communication, as previously mentioned, also have Doppler effect in wireless channel.In mobile communications, when base station shifted to by travelling carriage, frequency gets higher, during away from base station, frequencies go lower.Doppler effect increases the complexity of mobile communication further.
The radio channel characteristic more than referred to, comprises multipath transmisstion, delay spread, fading characteristic and Doppler effect etc., is only the wireless channel of point-to-point.In cellular mobile telecommunications, the signal that terminal sends is except serviced base station receives, also received by multiple neighbor base stations adjacent with serving BS, form up channel interference (wireless channel of terminal to base station is commonly referred to up channel, and base station is commonly referred to down channel to the wireless channel of terminal) of neighbor base station; Equally, base station transmit signals, except being received by the terminal in its coverage, is also received by the terminal of adjacent area simultaneously, therefore constitutes the down channel interference of adjacent area terminal.This point-to-multipoint in cellular radio communication system, the wireless channel environment of multipoint-to-point is called radio network information channel, and radio network information channel is except changing with communication geographical environment, translational speed and except change, also have close relationship with cellular network topologies structure.
The complexity of radio network information channel, diversity and time variation bring great difficulty to wireless base system design and system parameters configuration.Usual wireless base system, before batch application, is difficult to its systematic function in a network environment of precognition; Even if base station system have passed laboratory system test.The system testing environment built in laboratory only supports function and the performance verification of point-to-point usually, namely only possesses wireless channel simulation ability, does not possess radio network information channel analog capability.Exactly because also laboratory system tests the various radio channel characteristic cannot portrayed in real network environment, usually before the application of base station system batch, need to build the commercial pilot office of certain scale, fully to expose Problems existing in base station system.The commercial pilot office of scale needs to drop into a huge sum of money, and needs the construction quite grown and service time.
Wireless emulation technology all plays the part of important role in wireless technology research and wireless system research and development.The complexity of wireless system research and development and wireless technology research is far above wired system, and this mainly makes wireless system complexity greatly increase because wireless environment changes along with conditions such as time, place, geographical environment, weather environment, mobility, interference.Wireless product must consider to solve the impact that these factors are brought, and such as wants solving multipath, decline, channel relevancy, noise, interference etc.
The demand for development of wireless technology is while fast lifting transmittability, and the availability of frequency spectrum also will constantly increase, and limited frequency spectrum realizes the two-forty, Large Copacity and the high-quality that communicate.Current MIMO (multi-input and multi-output channel) technology, COMP technology, RELAY technology, carrier aggregation, large bandwidth etc. all become new industrial research focus.
Wireless communication technology development is swift and violent, and new technology constantly occurs, channel simulator technology also needs the needs adapting to new industrial research and research and development.
Current wireless channel simulation technology mainly contains soft simulation technology and channel simulator technology.
Soft simulation technology: carry out wireless modeling by instruments such as MATLAB, Output simulation result, generally runs in PC; Soft simulation technology is generally used for off-line, nonreal time simulation.
Channel simulator: carry out wireless modeling by embedded system, the channel data real-time effect of modeling generation in the base band data of reality.The hardware system that channel simulator needs design research and development new, can realize point-to-point, real-time channel simulator.
Summary of the invention
Main purpose of the present invention cannot be simulated and reappears multichannel in order to solve prior art and to interact the problem of lower, real-time, complicated real network channel circumstance, the invention provides a kind of method and device thereof of indoor wireless networks channel simulation.
According to an aspect of the present invention, the invention provides a kind of method of indoor wireless networks channel simulation, comprising:
According to the topological diagram of indoor wireless networks channel simulation system and the channel data file generated channel characteristics script of collection;
Channel bank is according to the channel characteristics table of described channel characteristics script, point-to-point channel process is carried out to the base band data of each input, result is superposed, obtain the base band data for giving base station or UE, base band routing module carries out route according to the routing iinformation of channel characteristics script to base band data.
Preferably, described channel bank comprises input side channel bank and outlet side channel bank, wherein:
Described input side channel bank carries out point-to-point channel process according to the base band data of channel characteristics table to input, obtains point-to-point channel base band data, and gives base band routing module;
Described base band routing module gives described outlet side channel bank according to routing iinformation described point-to-point channel base band data;
Described outlet side channel bank, according to channel characteristics table, after described point-to-point channel base band data is superposed, gives base station or UE.
Or be:
Described base band routing module, according to channel characteristics script information, gives described channel bank the base band data of each input;
Described channel bank carries out point-to-point channel process according to channel characteristics table to each base band data inputted, and obtains point-to-point channel base band data, gives base band routing module after superposing;
Described base band routing module according to routing iinformation, the point-to-point channel base band data route superposed to base station or UE.
In addition, the channel data file of described collection comprises the channel data file that outfield reality gathers or the channel data file produced according to the Mathematical Modeling set up.
According to a further aspect in the invention, the invention provides a kind of indoor wireless networks channel simulation device, comprising:
Script administration module, root is according to the channel data file generated channel characteristics script of the topological diagram of indoor wireless networks channel simulation system and collection;
Channel bank, according to the channel characteristics table of described channel characteristics script, carrying out point-to-point channel process to the base band data of each input, superposes result, obtaining the base band data for giving base station or UE;
Base band routing module, the routing iinformation according to channel characteristics script carries out route to base band data.
Wherein, described script administration module connects base band routing module and channel bank, and base band routing module connects base station or UE by input side channel bank, and connects base station or UE by outlet side channel bank; Wherein,
The channel characteristics script of foundation is downloaded to channel bank and base band routing module by described script administration module; And initiate initiation command;
Input side channel bank carries out point-to-point channel process according to the base band data of channel characteristics table to input, obtains point-to-point channel base band data, and gives base band routing module;
Described base band routing module gives described outlet side channel bank according to routing iinformation described point-to-point channel base band data;
Described outlet side channel bank, according to channel characteristics table, after described point-to-point channel base band data is superposed, gives base station or UE.
In addition, described script administration module connects base band routing module and channel bank, the external channel bank of base band routing module, and the input of base band routing module is connected base station or UE respectively with output, wherein;
The channel characteristics script of foundation is downloaded to channel bank and base band routing module by described script administration module; And initiate initiation command;
Described channel bank carries out point-to-point channel process according to channel characteristics table to each base band data inputted, and obtains point-to-point channel base band data, gives base band routing module after superposing;
Described base band routing module according to routing iinformation, the point-to-point channel base band data route superposed to base station or UE;
Wherein, in described script administration module, be also provided with Script controlling module, read channel characteristics table for timing, and upgrade channel characteristics data to channel bank.
Compared with prior art, beneficial effect of the present invention is:
1) the invention provides a kind of new wireless channel simulation technology, the function of current emulation technology can be realized on the one hand, comprise point-to-point channel simulation, namely complete the function of existing channel simulator; Multichannel can be reappeared on the other hand to interact real network channel circumstance that is lower, real-time, complexity, comprise mimo channel, multiple cell interference channel etc.
2) the present invention can carry out channel simulator process according to outfield channel to base band data, can reappear outfield channel, can set up the multistation the same with outfield in indoor, multi-terminal network channel circumstance.Also can produce channel characteristics script by model, complete the channel simulator based on modeling.
3) the present invention by editor's channel characteristics table, can realize the channel circumstance that the multi-users such as switching, network edge need, may be used for Product Validation, expedite product failure convergence, shorten the time that product stablizes needs neatly.
4) can physical port be saved based on base band data route, a physical channel can carry more base band data.And can to realize non-boundary network channel environment.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of indoor wireless networks channel simulation of the present invention;
Fig. 2 is the structural representation of the embodiment of the present invention one;
Fig. 3 is the structural representation of the embodiment of the present invention two;
Fig. 4 is the modeling process chart of the embodiment of the present invention one;
Fig. 5 is the modeling process chart of the embodiment of the present invention two.
Embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment is only for instruction and explanation of the present invention, is not intended to limit the present invention.
The invention provides a kind of method of indoor wireless networks channel simulation, as shown in Figure 1, comprising:
S11) according to the topological diagram of indoor wireless networks channel simulation system and the channel data file generated channel characteristics script of collection;
S12) channel bank is according to the channel characteristics table of described channel characteristics script, point-to-point channel process is carried out to the base band data of each input, result is superposed, obtain the base band data for giving base station or UE, base band routing module carries out route according to the routing iinformation of channel characteristics script to base band data.
Wherein, channel bank comprises input side channel bank and outlet side channel bank, wherein step S12) specifically can comprise:
Input side channel bank carries out point-to-point channel process according to the base band data of channel characteristics table to input, obtains point-to-point channel base band data, and gives base band routing module;
Base band routing module gives described outlet side channel bank according to routing iinformation described point-to-point channel base band data;
Outlet side channel bank, according to channel characteristics table, after described point-to-point channel base band data is superposed, gives base station or UE.
Or, step S12) also can be:
Base band routing module, according to channel characteristics script information, gives described channel bank the base band data of each input;
Channel bank carries out point-to-point channel process according to channel characteristics table to each base band data inputted, and obtains point-to-point channel base band data, gives base band routing module after superposing;
Base band routing module according to script information, the point-to-point channel base band data route superposed to base station or UE.
In addition, the channel data file of collection comprises the channel data file that outfield reality gathers or the channel data file produced according to the Mathematical Modeling set up.Script comprises point-to-multipoint, the network channel incidence relation of multipoint-to-point, and the channel characteristics of point-to-point.Channel characteristics comprises large scale channel and small scale channel characteristics.
Method and the device (being called for short INES indoor network emulation system) thereof of indoor wireless networks channel simulation is illustrated below by two embodiments, INES is by RRU (Radio Remote Unit) external BTS and UE of equipment, if BTS or UE supports directly to export baseband interface, then directly can not connect INES by RRU, this washability of RRU is indicated by the dashed box in the drawings.In addition, the INES in embodiment one also can with the INES devices interconnect in embodiment two to support more BTS and UE.Optical fiber or other high-speed communication medium is adopted to connect between equipment.
Embodiment one, as shown in Figure 2, INES concrete structure module, comprising:
Script administration module, described channel characteristics script according to the channel data file generated channel characteristics script of the topological diagram of indoor wireless networks channel simulation system and collection, and is downloaded to channel bank and base band routing module by root, and initiates initiation command; Also be provided with Script controlling module in script administration module, read channel characteristics table for timing, and upgrade channel characteristics data to channel bank.
Channel bank, according to the channel characteristics table of described channel characteristics script, carrying out point-to-point channel process to the base band data of each input, superposes result, obtaining the base band data for giving base station or UE;
Base band routing module, the routing iinformation according to channel characteristics script carries out route to base band data.
Its concrete syndeton is: script administration module connects base band routing module and channel bank, and base band routing module connects the node (NB) of base station by input side channel bank, and connects UE by outlet side channel bank;
Its handling process is as shown in Figure 2 and Figure 4, and the channel characteristics script of foundation is downloaded to input side channel bank (processing unit A, B, C), outlet side processing unit (processing unit D) and base band routing module by script administration module; And initiate initiation command;
Input side channel bank carries out point-to-point channel process according to channel characteristics table to the base band data inputted from node (NB), obtains point-to-point channel base band data, and gives base band routing module; If the baseband signal of input participates in the synthesis of multiple network channel, then the processing unit of input side first can copy many parts base band data.
Described base band routing module gives described outlet side channel bank according to routing iinformation described point-to-point channel base band data;
Described outlet side channel bank, according to channel characteristics table, after described point-to-point channel base band data is superposed, gives UE.
Embodiment two, as shown in Figure 3, INES concrete structure module, comprising:
Script administration module, described channel characteristics script according to the channel data file generated channel characteristics script of the topological diagram of indoor wireless networks channel simulation system and collection, and is downloaded to channel bank and base band routing module by root, and initiates initiation command; Also be provided with Script controlling module in script administration module, read channel characteristics table for timing, and upgrade channel characteristics data to channel bank
Channel bank, according to the channel characteristics table of described channel characteristics script, carrying out point-to-point channel process to the base band data of each input, superposes result, obtaining the base band data for giving base station or UE;
Base band routing module, the routing iinformation according to channel characteristics script carries out route to base band data.
Its concrete syndeton is as shown in Figure 3, script administration module connects base band routing module and channel bank, the external channel bank of base band routing module (as processing unit A), input and the output of base band routing module are connected node (NB) and the UE of base station respectively
Its concrete handling process is as shown in Figure 3 and Figure 5;
The channel characteristics script of foundation is downloaded to channel bank and base band routing module by script administration module; And initiate initiation command; Script controlling module reads the channel characteristics table of channel characteristics script,
Channel bank carries out point-to-point channel process according to channel characteristics table to each base band data inputted, and obtains point-to-point channel base band data, gives base band routing module after superposing;
Described base band routing module according to channel characteristics script information, the point-to-point channel base band data route superposed to base station or UE
Wherein, in described script administration module, be also provided with Script controlling module, read channel characteristics table for timing, and upgrade channel characteristics data to channel bank.
Baseband signal is participated in the situation of multiple Channel Processing, data copy mode has various ways to realize, as shared queue, broadcast mode etc.Routing mode is industry mature technology, and implementation has multiple, as technology such as exchange, bus, routes.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. a method for indoor wireless networks channel simulation, is characterized in that, comprising:
According to the topological diagram of indoor wireless networks channel simulation system and the channel data file of collection, generate the channel characteristics script with channel characteristics table;
Channel bank, according to the channel characteristics table of described channel characteristics script, carries out point-to-point channel process to each input base band data, superposes result, obtains the point-to-point channel base band data for giving base station or UE;
Base band routing module carries out route according to the routing iinformation of channel characteristics script to described point-to-point channel base band data.
2. method according to claim 1, is characterized in that, described channel bank comprises input side channel bank and outlet side channel bank, wherein:
Described input side channel bank carries out point-to-point channel process according to the base band data of channel characteristics table to input, obtains point-to-point channel base band data, and gives base band routing module;
Described base band routing module gives described outlet side channel bank according to routing iinformation described point-to-point channel base band data;
Described outlet side channel bank, according to channel characteristics table, after described point-to-point channel base band data is superposed, gives base station or UE.
3. a method for indoor wireless networks channel simulation, is characterized in that, comprising:
There is according to the topological diagram of indoor wireless networks channel simulation system and the channel data file generated of collection the channel characteristics script of channel characteristics table;
Base band routing module, according to channel characteristics script information, gives described channel bank each input base band data;
Described channel bank carries out point-to-point channel process according to channel characteristics table to each base band data inputted, and obtains point-to-point channel base band data, gives base band routing module after superposing;
Described base band routing module according to routing iinformation, the point-to-point channel base band data route superposed to base station or UE.
4. the method according to claim 1 or 2 or 3, is characterized in that, the data file of the channel of described collection comprises the channel data file that outfield reality gathers or the channel data file produced according to the Mathematical Modeling set up.
5. an indoor wireless networks channel simulation device, is characterized in that, comprising:
Script administration module, root has the channel characteristics script of channel characteristics table according to the channel data file generated of the topological diagram of indoor wireless networks channel simulation system and collection;
Channel bank, according to the channel characteristics table of described channel characteristics script, carries out point-to-point channel process to each input base band data, superposes result, obtains the point-to-point channel base band data for giving base station or UE;
Base band routing module, the routing iinformation according to channel characteristics script carries out route to described point-to-point channel base band data.
6. device according to claim 5, it is characterized in that, described script administration module connects base band routing module and channel bank, and base band routing module connects base station or UE by input side channel bank, and connects base station or UE by outlet side channel bank; Wherein,
The channel characteristics script of foundation is downloaded to channel bank and base band routing module by described script administration module; And initiate initiation command;
Input side channel bank carries out point-to-point channel process according to the base band data of channel characteristics table to input, obtains point-to-point channel base band data, and gives base band routing module;
Described base band routing module gives described outlet side channel bank according to routing iinformation described point-to-point channel base band data;
Described outlet side channel bank, according to channel characteristics table, after described point-to-point channel base band data is superposed, gives base station or UE.
7. an indoor wireless networks channel simulation device, is characterized in that, comprising:
Script administration module, root has the channel characteristics script of channel characteristics table according to the channel data file generated of the topological diagram of indoor wireless networks channel simulation system and collection;
Channel bank, for the channel characteristics table according to channel characteristics script, carries out point-to-point channel process to each input base band data, obtains point-to-point channel base band data, give base band routing module after superposing;
Base band routing module, for according to routing iinformation, the point-to-point channel base band data route superposed to base station or UE.
8. device according to claim 7, is characterized in that, described script administration module connects base band routing module and channel bank; Base band routing module connecting channel processing unit; The input of base band routing module connects base station or UE; The output of base band routing module connects base station or UE;
Wherein, the channel characteristics script of foundation is downloaded to channel bank and base band routing module by described script administration module.
9. the device according to claim 6 or 8, is characterized in that, is also provided with Script controlling module in described script administration module, reads channel characteristics table for timing, and upgrades channel characteristics data to channel bank.
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| CN201110131589.5A CN102790990B (en) | 2011-05-19 | 2011-05-19 | Method for indoor wireless network information channel simulation and device thereof |
| PCT/CN2011/077729 WO2012155390A1 (en) | 2011-05-19 | 2011-07-28 | Method and apparatus for simulating indoor wireless network channel |
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| CN201110131589.5A CN102790990B (en) | 2011-05-19 | 2011-05-19 | Method for indoor wireless network information channel simulation and device thereof |
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| CN106034002A (en) * | 2015-03-19 | 2016-10-19 | 中兴通讯股份有限公司 | Multichannel wideband channel simulation method and device |
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