CN102638809A - Simulation method for interference coexistence of mobile communication system - Google Patents
Simulation method for interference coexistence of mobile communication system Download PDFInfo
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Abstract
The invention discloses a simulation method for interference coexistence of a mobile communication system. The simulation method at least comprises the following steps: generating a simulation environment, and arranging one or more base stations in the simulation environment; arranging one or more fixed mobile stations in the simulation environment and determining a gain matrix G; accessing the mobile stations into the base stations for power control according to the gain matrix G, so as to lead the quantity of the accessed mobile stations to achieve the target capacity of the simulation environment; and capturing the simulation result of the target state. The target state refers to a state when mobile stations above first preset proportion in all the accessed mobile stations, and the target capacity is equal to the maximum quantity of the mobile stations which can be accessed in the simulation environment under the target state. As the demand quantity on the original data is small and the simulation speed is fast, the simulation method has small deviation between simulation details and practical situations, and can effectively guide the design of a practical network.
Description
Technical field
The present invention relates to computer emulation method and device thereof that a kind of GSM disturbs coexistence.Exactly, relate to a kind of in the wireless network and internetwork electromagnetic compatibility characteristic carry out the method and apparatus of simulation analysis.Belong to the wireless communication sumulating technical field.
Background technology
Mobile (wireless) development of Communication Technique brings great convenience for people's life.At present, GSM has developed into the third generation (3G), in the nervous formulation of the standard of the 4th third-generation mobile communication system, but simultaneously second generation GSM GSM in occupation of main market.Therefore, following mobile communication market of scholarly forecast will be 3G the situation of (second generation/third generation/the 4th generation) mobile communication technology coexistence.
For now, radio administration of the Ministry of Information Industry has externally announced " about the notice of third generation public mobile communication system frequency planning problem " (letter portion does not have [2002] No. 479) in October, 2002.In the scheme of this frequency planning; With the 1920-1980MHz/2110-2170MHz frequency range as FDD (Frequency Division Duplexing; FDD) main use frequency range; The 1755-1785MHz/1850-1880MHz frequency range is shared by the system communication system of WCDMA and CDMA2000 standard as the additional working frequency range of FDD (time Division Duplexing, time division duplex); 1880-1920MHz, 2010-2025MHz frequency range are as the main use frequency range of TDD, and the 2300-2400MHz frequency range is as the additional working frequency range of TDD; 1980-2010MHz/2170-2200MHz is as the satellite mobile communication system working frequency range.Each frequency range of mainly using is as shown in Figure 1.
By finding out among the figure, these 3 technical standards all obtain using in China, have so just formed the situation of 3 standard coexistences.Because the interval of frequency planning is nearer, has certain interference between the system.The interference coexistence of 3 kinds of systems becomes the major issue that operator is concerned about when the network planning.In addition, the continuation of 2G system is used, and makes that same operator also is the problem that each operator is concerned about very much based on the relevant interference between the system of various criterion.So, must analyze the interference of 2G and each standard room of 3G at the initial stage that operator carries out networking and enlarging, analyze the interference between base station, travelling carriage in base station yet to be built and other system base station, the mobile station system, guarantee optimal network planning.
Simultaneously, the current computer emulation technology is applied to the network planning and the optimizing process of mobile communication in large quantities, in conjunction with actual drive test data, can very important theoretical foundation reference be provided for the actual planning and designing of network.
Inventor of the present invention is in realizing process of the present invention; Find that there is following technological deficiency at least in prior art: aspect the interference coexistence of wireless network; Current computer emulation is big to the initial data demand; And shortcoming such as have that simulation velocity is slow, emulation details and actual deviation are big, especially in dynamic simulation, these shortcomings are very obvious.Therefore, be badly in need of providing a kind of emulation mode fast and accurately to disturbing coexistence to analyze between communication system.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the emulation mode that a kind of GSM disturbs coexistence, wherein, said emulation mode comprises the steps: to generate simulated environment at least, in said simulated environment, arranges one or more base stations; In said simulated environment, arrange one or more static travelling carriages and confirm gain matrix G; Said travelling carriage is accessed to the base station and carry out power control according to said gain matrix G, the quantity of the feasible travelling carriage that is inserted reaches the target capacity of said simulated environment; Step 40: the simulation result of capturing dbjective state.Wherein, and each the element g among the said gain matrix G (i, value j) is the path loss in i travelling carriage and j the path that the base station constituted and the lognormal shadow fading sum on this paths; I=(1,2,3 ..., M), the sequence number of each travelling carriage of representing to be arranged in the said simulated environment; M is for total smaller or equal to the travelling carriage of in said simulated environment, arranging; J=(1,2,3 ..., N), be illustrated in the sequence number of each base station of arranging in the said simulated environment; N is smaller or equal to the total number of base of in said simulated environment, arranging; Said dbjective state refers to the state when making that the travelling carriage more than first predetermined ratio is in satisfactory state in all travelling carriages inserted, the maximum quantity of the travelling carriage that said target capacity equals in the said simulated environment of said dbjective state, can to insert.
The present invention also provides a kind of GSM to disturb the emulation mode of coexistence, also comprises step 60: statistics is added up and exported to the simulation result of being captured.
The present invention also provides a kind of GSM to disturb the emulation mode of coexistence, and said first predetermined ratio is more than or equal to 92% and smaller or equal to 98%; And said simulation result comprises the carrier/interface ratio of the uplink and downlink that each has inserted travelling carriage and the transmitting power separately and the received signal to noise ratio that have respectively inserted travelling carriage and the base station that each has been arranged at least.
The present invention also provides a kind of GSM to disturb the emulation mode of coexistence; Under the situation of a plurality of wireless communication system coexistences; Also comprise: emulation interference source wireless communication system; Make and in said interference source wireless communication system, insert the travelling carriage that quantity is second predetermined ratio of the target capacity of said interference source wireless communication system under the situation that no any interference source wireless communication system disturbs, wherein, said second predetermined ratio is more than or equal to 70% and smaller or equal to 80%.
The present invention also provides a kind of GSM to disturb the emulation mode of coexistence; Wherein, Also comprise the steps: to confirm said by the target capacity under the situation that receives above-mentioned interference source wireless communication system interference of interfere with wireless communications system and the relation curve of ACIR; Drawn when equaled said ACIR value during by the 3rd predetermined ratio of the target capacity of interfere with wireless communications system under the situation that no any interference source wireless communication system disturbs by the target capacity of interfere with wireless communications system by this relation curve, wherein said the 3rd predetermined ratio is more than or equal to 92% and smaller or equal to 98%.
The present invention also provides a kind of GSM to disturb the emulation mode of coexistence, wherein, in the step 30, according to gain matrix G, i travelling carriage is linked into g (i, k) pairing base station; Wherein, and g (i, value k) is g (i, 1), g (i, 2); G (i, 3) ..., g (i, the maximum in N).
The present invention also provides a kind of GSM to disturb the emulation mode of coexistence, and wherein, said emulation mode comprises like lower unit at least: initialization unit, generate simulated environment, and in said simulated environment, arrange one or more base stations; The travelling carriage arrangement unit is arranged one or more static travelling carriages and is confirmed gain matrix G in said simulated environment; Radio resource managing unit accesses to the base station with said travelling carriage and carries out power control according to said gain matrix G, and the quantity of feasible each travelling carriage that is inserted reaches the target capacity of said simulated environment; Capture the unit, capture the simulation result of dbjective state, wherein, each the element g among the said gain matrix G (i, value j) is the path loss in i travelling carriage and j the path that the base station constituted and the lognormal shadow fading sum on this paths; I=(1,2,3 ..., M), the sequence number of each travelling carriage of representing to be arranged in the said simulated environment; M is for total smaller or equal to the travelling carriage of in said simulated environment, arranging; J=(1,2,3 ..., N), be illustrated in the sequence number of each base station of arranging in the said simulated environment; N is smaller or equal to the total number of base of in said simulated environment, arranging; And said dbjective state refers to the state when making that the travelling carriage more than first predetermined ratio is in satisfactory state described in all travelling carriages inserted, the maximum quantity of the travelling carriage that said target capacity equals can to insert in the said simulated environment of said dbjective state.
Compared with prior art, the present invention has the following advantages:
Emulation mode according to the embodiment of the invention has adopted static candid photograph technology, and is little to the initial data demand; The emulation mode of the embodiment of the invention has adopted the STATIC SIMULATION technology, and simulation velocity is fast, especially, through the interference type of emulation is set, improves simulation efficiency; In addition, experimental data shows that the emulation mode emulation details and the actual deviation of the embodiment of the invention are very little, can instruct the design of real network effectively; In addition; In the STATIC SIMULATION method of the embodiment of the invention, first the whole system operation process is divided into some intervals, the candid photograph between per two intervals is got the result and is carried out record; And analyze generation with statistical method and need the result, thereby improve simulation velocity.Because clear, the wireless resource management algorithm of model is practical comprehensively, especially greatly degree has reduced the required processing time of complicated signaling process in the dynamic simulation, and simulation velocity is fast, simulation result easy to understand and annotation.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in specification, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is that the 3GHz frequency spectrum takies the situation sketch map;
Fig. 2 a is the schematic flow sheet that disturbs the emulation mode of coexistence according to the GSM of first embodiment of the invention;
Fig. 2 b is the schematic flow sheet according to each step in the RRM step of the emulation mode of the GSM interference coexistence of first embodiment of the invention
Fig. 3 is the structural representation that disturbs the simulator of coexistence according to the GSM of second embodiment of the invention;
Fig. 4 is the simulation flow sketch map to single system according to the embodiment of the invention;
Fig. 5 is the simulation flow sketch map to dual system according to the embodiment of the invention;
Fig. 6 is the schematic flow sheet that calculates the descending interference of TD-SCDMA;
Fig. 7 is the schematic flow sheet that calculates the TD-SCDMA uplink interference;
Fig. 8 be in experiment situation one CDMA2000 system up-link capacity and ACIR concern sketch map;
Fig. 9 be in experiment situation one CDMA2000 system down link capacity and ACIR concern sketch map;
Figure 10 be WCDMA travelling carriage TD-SCDMA system when the TD-SCDMA travelling carriage is disturbed in experiment situation two capacity and ACIR concern sketch map;
Figure 11 be WCDMA travelling carriage TD-SCDMA system during in experiment situation two to the TD-SCDMA base station interference capacity and ACIR concern sketch map;
Figure 12 is the complete uplink synchronization capacitance loss of TD-SCDMA smart antenna (R=577m) in experiment situation three;
Figure 13 is the complete DL synchronization capacitance loss of TD-SCDMA smart antenna (R=577m) in experiment situation three;
Figure 14 is the complete uplink synchronization capacitance loss of TD-SCDMA smart antenna (the base station spacing distance is a radius of society) in experiment situation three;
Figure 15 is the complete DL synchronization capacitance loss of TD-SCDMA smart antenna (the base station spacing distance is a radius of society) in experiment situation three.
Embodiment
Below will combine accompanying drawing and embodiment to specify execution mode of the present invention, how the application technology means solve technical problem to the present invention whereby, and the implementation procedure of reaching technique effect can make much of and implement according to this.Need to prove that only otherwise constitute conflict, each embodiment among the present invention and each characteristic among each embodiment can mutually combine, formed technical scheme is all within protection scope of the present invention.
First embodiment
With reference to figure 2 first embodiment is described below, disturbs the emulation mode of coexistence to comprise the steps according to the GSM of first embodiment of the invention.
Step S210 generates simulated environment, in said simulated environment, arranges simulation base station.
Particularly, generate simulated environment, and in simulated environment, arrange simulation base station (BS).According to different emulation needs for example interference and simulated environment such as type of wireless communication system of being disturbed and cellular re-use coefficient are set.In addition, also relevant parameter can be set, for example simulated library parameter, common parameter and operator's parameter etc. are to generate simulated environment or to arrange simulation base station according to relevant parameter.
Step S220: in simulated environment, arrange one or more static travelling carriages and confirm gain matrix G.
More specifically, in the simulated environment that is generated, arrange one or more travelling carriages (UE).For example, can be that each travelling carriage is distributed in the simulated environment that is generated randomly, also can set each travelling carriage residing position in the simulated environment that is generated as required respectively.
In addition, and each the element g among the gain matrix G (i, value j) is the path loss in i travelling carriage and j the path that the base station constituted and the lognormal shadow fading sum on this paths, wherein the sequence number of i each travelling carriage of representing to be arranged in the said simulated environment; I=(1,2,3 ... M), M is for total smaller or equal to the travelling carriage of in said simulated environment, arranging, j is illustrated in the sequence number of each base station of arranging in the said simulated environment; J=(1,2,3;, N), N is smaller or equal to the total number of base of in said simulated environment, arranging.
Step S230; According to gain matrix G each travelling carriage is accessed to the base station and the travelling carriage that inserted and corresponding base station thereof are carried out power control, make the maximum quantity of the travelling carriage that the quantity of the travelling carriage that inserted equals when the travelling carriage more than first predetermined ratio is in satisfactory state in feasible all travelling carriages that inserted, can to insert in (abbreviating this state as dbjective state) simulated environment.
In this article, the state of the simulated environment of dbjective state is called dbjective state, the capacity under this dbjective state is called target capacity.Preferably, can first predetermined ratio be set to 95%.
Particularly, step S230 can comprise following substep again.
Step S231, access control (admitting control) substep: reference gain matrix G makes each travelling carriage insert relevant base station.For example, can be according to gain matrix G, with i travelling carriage be linked into g (i, k) pairing base station, wherein, g (i, value k) be (g (i, 1), g (i, 2), g (i, 3) ..., the maximum among the g (i, N)).
Step S232, interference calculation substep: calculate each travelling carriage interference gross power separately.
Step S233; Resource allocation step (is also claimed; The power division step): carry out resource allocation, more specifically, come to make each travelling carriage to reach satisfactory state as far as possible through the power Control Circulation; That is, each travelling carriage is carried out power division satisfy the required signal-to-noise ratio requirement so that the employed power of the up transmission of each travelling carriage reaches.
In whole power Control Circulation, under the situation that gain matrix G remains unchanged, repeat the power control operation of pre-determined number, for example, carry out number of times greater than 150 times.
In the present embodiment, at the E of measured travelling carriage
b/ N
0The ratio of noise density (bit energy with) is less than target E
b/ N
0-0.5dB thinks that then travelling carriage (user) is in the state of going offline when (dB representes decibel, and wherein 0.5dB is an example, also can select other approximation as required); At measured E
b/ N
0More than or equal to target E
b/ N
0During-0.5dB, think that then the user is in satisfactory state, wherein, target E
b/ N
0Can adopt the value of stipulating in the respective wireless communication standard.In other example, can adjust as required/be provided with and think its E when the user is in satisfactory state
b/ N
0The value that will reach.Wherein, E
b/ N
0Value equal measured C/I (C:Carrier, carrier power; I:Interference disturbs gross power, also C/I is called carrier/interface ratio) multiply by processing gain (comprising spreading gain, coding gain etc.).
Alternatively, behind the subscriber access system, if fdd mode also can judge whether to be in soft changing state, if then carry out the macro diversity operation that brings by soft handover.
Alternatively, when carrying out the power Control Circulation, can also carry out load control, carrying out the heavily distribution of resource, thereby make systematic function better.
Step S240 captures the simulation result of dbjective state, promptly gathers comprising of dbjective state of the for example current transmitting power corresponding with each travelling carriage, E
b/ N
0Simulation result with quantity of the travelling carriage of access path and current access etc.
Step S250, determining step.
Alternatively, judge that executed candid photograph number of times whether more than or equal to the predetermined number of times of capturing, if judged result is " denying ", then returns step S210, each travelling carriage is disposed to simulated environment again, otherwise, if be judged as " being ", then finish emulation.
Especially; Carrying out above-mentioned steps S210 to the emulation of step S250; Can be scheduled to set earlier and capture number of times; Candid photograph number of times that also can be when making the value of the average SIR (signal to interference and noiseratio, signal-to-jamming ratio) that reaches local is as the candid photograph number of times that is adopted.
In this article, will to the process of the simulation result of capturing dbjective state, be called (snapshot) process of once capturing from simulated environment, arranging each travelling carriage.In the process of a candid photograph; It is motionless that each travelling carriage all keeps; In other words; The comfortable step S220 of the travelling carriage arranged is arranged the back and rises and keeps motionless between tailend to step S240, thereby makes that lognormal shadow fading and path loss maintenance on each path that possibly insert of travelling carriage are constant, thereby has significantly reduced amount of calculation.
Step S260, alternatively, the facsimile method of present embodiment also can comprise statistics (analysis) step, and the simulation result of capturing (collection) among the step S240 is added up (analysis) and exported statistics.
Second embodiment
Explanation provides a kind of GSM to disturb the simulator of coexistence according to second embodiment of the invention below.
Simulator according to present embodiment comprises initialization unit, travelling carriage arrangement unit, radio resource managing unit, candid photograph unit (or claiming collecting unit) and judging unit.Alternatively, also can comprise statistical analysis unit.
The performed operation of initialization unit in the present embodiment, travelling carriage arrangement unit, radio resource managing unit, candid photograph unit and judging unit and statistical analysis unit is corresponding with step S110, S120, S130, S140 and the S150 of aforementioned first embodiment respectively; And corresponding subelement can be set handle the substep in each step; Therefore; For clear more and concise and to the point, no longer each unit and the subelement to this enforcement launches explanation in detail.Technical characterictic among first embodiment all can be bonded in the present embodiment.
The 3rd embodiment
With reference to figure 3 the 3rd embodiment is described below.Third embodiment of the invention provides the emulation mode that a kind of step is abundant more, consider comprehensive more GSM interference coexistence.In the present embodiment, utilize C Plus Plus, realize each step in each facsimile method through program.
Present embodiment and the same or analogous step of first embodiment will be represented with identical Reference numeral.And first each technological means among the embodiment, all can be applicable to present embodiment.
Step S305, the parameter read step.
For example, C++ capable of using (trade mark) sound instruction comes from text (for example, txt file), to read in parameter, and parameter comprises for example parameter such as operator.
Step S210, initialization step.
In this step, carry out initialization operation, to generate simulated environment, to arrange simulation base station.
Particularly, the operator's parameter that can pass through to be read confirms it is which kind of simulated environment; Perhaps, also can utilize the inherited characteristics of C Plus Plus, derive the hybrid simulation environment that is applicable to a plurality of operators.
Need to prove in the present embodiment, the step S220 among first embodiment is divided into three sub-steps S221 and S222, explanation as follows respectively.
Step S221 arranges travelling carriage, carries out the initialization of travelling carriage parameter, for example, and the for example position and the transmitting power etc. of initialization travelling carriage.
Step S222 calculates the path loss between each travelling carriage and the base station, and wherein each travelling carriage possibly be in the different simulated environment, in addition, confirms gain matrix G.
The step S230 of present embodiment and first embodiment can comprise S231, S232 and S233 three sub-steps similarly.
Step S231; Access control substep: make travelling carriage insert relevant base station according to access control that is provided with in advance and power control algorithm; For example; Will travelling carriage in the path that might insert, the base station of selecting the minimum pairing base station, that path of path loss will insert as this travelling carriage.
Step S232, interference calculation substep: calculate each travelling carriage interference gross power separately.
Step S233, resource allocation step: carry out the power Control Circulation, in each circulation, the interference that comprises the up-downgoing between internal system and system of calculating each travelling carriage is to record E at that time
b/ N
0, and with measured E
b/ N
0With according to target E
b/ N
0Compare, carry out power Control Circulation next time according to comparative result.Transmitting power when finishing according to the power Control Circulation confirm for example each carrier/interface ratio and each that has inserted the uplink and downlink of travelling carriage that will capture inserted the simulation results such as transmitting power separately and received signal to noise ratio of travelling carriage and the base station that each has been arranged.
Step S233 repeats above-mentioned steps S231 and step 233 and inserts other travelling carriages with continuation, but needs to guarantee to have the user's more than 95% E
b/ N
0Value reach satisfied scope (that is, greater than E
b/ N
0-0.5dB).
Step S240 captures the simulation result of dbjective state, for example, can simulation result be preserved hereof.
Step S250, determining step is judged executed candid photograph number of times (promptly; Gather the number of times of (candid photograph) simulation result) whether more than or equal to the predetermined number of times of capturing,, then return step S210 if judged result is " denying "; Each travelling carriage is disposed to simulated environment again; Otherwise, if be judged as " being ", then end process.Determining step is optional, because when carrying out emulation, also can only once capture.
Step S260 alternatively, also can comprise the statistical analysis step, and statistics is added up and exported to the data of compiling among the step S240.For example, can statistics be write destination file, destination file can comprise public destination file, portable terminal (travelling carriage) destination file and base station destination file etc.
The 4th embodiment
With reference to figure 4 the 4th embodiment is described below.Disturb in the emulation mode of coexistence at the GSM that fourth embodiment of the invention provides; Select corresponding interference type through setting up common parameter variable simulation link; Wherein, Interference type for example comprise native system BS to native system UE, external system BS to native system UE, external system UE to native system UE; Native system UE to interference types such as native system BS, wherein is included into the first three interference type descending interference, descending interference is included in back three kinds of interference native system BS, external system UE to native system BS, external system BS.
The same or analogous step of embodiment in present embodiment and the preceding method will be represented with identical Reference numeral.And first each technological means among the embodiment, all can be applicable to present embodiment.
In addition, simulation flow is as shown in Figure 4, introduces common parameter simulation link, when simulation parameter reads in, can be as required for to give different values for common parameter simulation link, thus the interference type that need consider during selection emulation.For example; When carrying out single system (wireless communication system that under the situation that no any interference source wireless communication system disturbs, moves) emulation, the value that the user can simulation link is set to represent the emulation uplink interference, emulation is descending or emulation uplink interference and descending interference simultaneously.For another example, when carrying out dual system emulation, if the user only expects the suffered interference of system uplink size, value that can simulation link is set to an expression emulation uplink interference type, and the suffered interference of system descending this moment is not calculated.Effectively raise simulation speed and efficient through this selectivity method of emulation.
In addition; When single system is carried out emulation; According to the interference which kind of type the pairing interference type of the value of simulation link confirms to calculate, for example, only calculate the uplink interference of native system UE to native system BS; Perhaps only calculate native system BS and disturb to afternoon of native system UE, perhaps simultaneously both.Preferably, the user's satisfaction rate by 95% is a weighing criteria, and the adjustment number of users is sought single system up-downgoing target capacity.Simulation flow is as shown in Figure 4.
In addition, from Fig. 4, can know, when admitting control; Different ground with the 3rd embodiment; Can the abundant travelling carriage of disposable access, and then carry out the power Control Circulation, the maximum quantity of the travelling carriage that can insert in for simulated environment when the travelling carriage more than first predetermined ratio (being preferably 95%) is in satisfactory state in feasible all travelling carriages that inserted up to the quantity of the travelling carriage that is inserted; That is, reach dbjective state up to simulated environment.When simulated environment reaches dbjective state, if insert more travelling carriage, just then the user's of institute's access travelling carriage satisfaction rate will hang down first predetermined ratio.Simulation flow when Fig. 5 illustrates dual system carried out emulation.
Elder generation's emulation interference source wireless communication system (the system A among Fig. 5) corresponds to first embodiment, then when build environment, and emulation interference source wireless communication system.Particularly; The for example up-downgoing capacity of emulation interference source system, in the interference source wireless communication system of institute's emulation, insert the user of quantity for second predetermined ratio (can second predetermined ratio be set between 70% to 80%, be preferably 75%) of this authority capacity to the interference power of external system and through for example utilizing emulation mode among first or three embodiment to confirm that the target capacity of interference source wireless communication system makes then.
Then, emulation is by interfere with wireless communications system (the system B among Fig. 5).
Particularly; Face interference ratio ACIR (Adjacent Channel Interference Ratio) for a setting; Adjustment is made to be reached rights state by the interfere with wireless communications system that promptly the user's that inserts upstream or downstream satisfaction rate to first predetermined ratio (for example by the number of users that is inserted in the interfere with wireless communications system; More than or equal to 92% and smaller or equal to 98%, be preferably 95%).Then; When capturing the simulation result of dbjective state; Can adjust ACIR; Draw by the relation curve of the target capacity of interfere with wireless communications system and ACIR, by above-mentioned curve draw when being equaled this by interfere with wireless communications aims of systems capacity and moved as single system by the interfere with wireless communications system (this by the interfere with wireless communications system under the situation that noiseless source wireless communication system disturbs) the 3rd predetermined ratio (can the 3rd predetermined ratio be set to be preferably 95%) of target capacity more than or equal to 92% and smaller or equal to 98% the time; Required ACIR value is as the evaluation criterion of weighing the inter-system interference size.Simulation flow is as shown in Figure 5, launches no longer in detail.
The 5th embodiment
The 5th embodiment is described below.The substantially corresponding GSM of emulation mode that present embodiment has provided in a kind of and the third embodiment of the invention disturbs the simulator that coexists.
Each unit in the face of this simulator is elaborated down.Need to prove, can pairing each the technical characterictic/technological means in following each unit (module) be applied to will answering in the step of above-mentioned each embodiment.
(1) parameter read module
The function of parameter read module is substantially corresponding to the step S305 of the 3rd embodiment.
At present general simulator custom uses the method that reads Parameter File to carry out the setting of different parameters value.The benefit of making like this is to be convenient to change the value of concrete parameter, and need not recompilate system, thereby reasonably separates design and use.In addition, be placed on system's parameters needed value in the different Parameter Files, carry out the setting of parameter when being convenient to concrete emulation, be convenient to let the user understand the actual physics meaning of parameter simultaneously.Concrete steps are following:
A). read the parameters file,, several operators file is arranged comprising the filename of the common parameter that will read, and their filenames separately.
B). read the parameter.cong file,, several operators file is arranged comprising the unbound document name of the common parameter that will read, and their unbound document names separately.
C). read the unbound document of common parameter, comprise the type of parameter in the unbound document of common parameter, maximum, minimum value, and default value, this file is used for common parameter is limited.
D). read the common parameter file, and make comparisons with unbound document simultaneously.If meet the constraints of unbound document, just compose corresponding value to variables corresponding; Otherwise, if the type of stipulating in the type of parameter value and the Parameter File does not match, need the report error message, if not conforming to of parameter area and regulation then composed default value to parameter.If not matching of data length that reads in and regulation needs the report error message.
E). read the unbound document of operator, comprise the type of parameter in the unbound document of operator, maximum, minimum value, and default value, this file is used for operator's parameter is limited.
F). read operator's Parameter File, and make comparisons simultaneously, just compose corresponding value to variables corresponding, if not conforming to of parameter area and regulation then composed default value to parameter if meet the constraint of unbound document with unbound document.If not matching of data length that reads in and regulation needs the report error message.
(2) initialization module
The function of initialization module is substantially corresponding to the step S210 of the 3rd embodiment.
Initialization is meant earlier carries out initialization to operator, by the concrete scene of the parameter determining emulation of operator, again simulating scenes is carried out initialization, again initialization base station and travelling carriage in concrete simulating scenes.Initialized detailed process comprises:
A). the initialization of operator: the number of confirming operator; The id of initialization operator; The air interface technologies of initialization operator; The position of initialization operator; Each base station of initialization; Each travelling carriage of initialization.
B). the initialization of statistics: the storage of destination file; Up user's satisfaction rate; The satisfaction rate of downlink user; The background noise value.
C). the initialization of simulating scenes: set up simulating scenes according to user's setting; The size of initialization simulating scenes; The loss of initialization minimal path; The distribution of initialization slow fading; Initialization minimal losses distance.
D). the initialization of base station: by the definite how further initialization base station of the simulating scenes in a last step; The common parameter of all base stations in this scene of initialization, as: minimax transmitting power, the number of channel, C/I desired value etc.; The attribute independent to each base station carries out initialization, as: base station id, base station location; User distribution; The user obeys under each base station evenly and distributes, promptly in the base station on arbitrary unit are number of users statistically say equal; Length and wide even distribution (area is average) by the hexagonal minimum boundary rectangle in base station.
(3) capture preparation block
The function of capturing preparation block is substantially corresponding to step S221 and the S222 of the 3rd embodiment.
Emulation was calculated all path losses before each the candid photograph; Concrete method is to confirm the air interface technologies of operator; Calculate the good lognormal shadow fading value that adds later; Deposit among the gain matrix G, the path loss matrix remains unchanged in once capturing, thereby has saved a lot of operation times.Concrete calculation process is following:
A). open up corresponding path loss matrix according to the determined interference type of simulation link
B). confirm that according to the air interface technologies of operator needs calculate which path loss and angle
. only calculate the path loss of base station to the travelling carriage in the native system during single system
. which the simulation link numerical value decision of setting according to the emulation needs during dual system calculates
Plant the interference path loss, following several kinds of situation are arranged: the base station is to travelling carriage; The base station is to the base station; Mobile to base station; Travelling carriage is to travelling carriage.
. in addition; When relevant with the TD-SCDMA base station; Also can consider the factor of smart antenna; So calculate corresponding angle, for example when the uplink interference TD-SCDMA of WCDMA is up, will calculate the angle of WCDMA travelling carriage
TD-SCDMA base station
C). travelling carriage is carried out initialization, mainly is that each candid photograph all will redistribute travelling carriage, and travelling carriage of initialization is once all wanted in every like this candid photograph, comprises the id of travelling carriage, the position of travelling carriage, and total some characteristics of all travelling carriages etc.;
D). select for use different path loss models to calculate according to the difference of operator's simulated environment of living in, and deposit the result in the corresponding path loss matrix.
(4) RRM module
The function of RRM module is substantially corresponding to the step S231 to S233 of the 3rd embodiment.
The RRM module comprises access control submodule, interference calculation submodule and power division submodule.These three modules correspond respectively to the step S231 to S233 of the 3rd embodiment substantially successively.
The access control submodule
Adopt minimal path loss criterion: be exactly and this travelling carriage between the minimum base station of path loss (additional shadow decline back) be exactly the base station that this travelling carriage inserts in advance.Concrete steps are:
A). travel through this travelling carriage to all base station path loss values, search out the minimum base station of path loss, record base station id and minimal path loss value.
B). whether detect the base station of inserting in advance has available resources.If available resources are arranged, just be the access attitude to the setting state of this travelling carriage; Otherwise think that this travelling carriage is blocked to fall by preparatory access base station, be the obstruction attitude to the setting state of travelling carriage.
C). insert the afterbody that operator inserts the travelling carriage array to this travelling carriage if successfully just insert, accomplish and insert.
D). the circulation above-mentioned steps, insert all users.
The interference calculation submodule
Follow according to simulation link numerical value and select the interference of travelling carriage and the base station of diplomatic copy system and external system native system.For the interference calculation module, the inventor is its thinking of example explanation with the TD-SCDMA network.As shown in Figure 6 for the descending interference calculation of TD-SCDMA; Calculate as shown in Figure 7 for the TD-SCDMA uplink interference.Because accompanying drawing can very clearly have been explained out these two handling processes, launch no longer in detail to set forth at this.
Power control submodule
Travelling carriage and base station are carried out power control, and the transmitting power of last travelling carriage is definite.For the power control of travelling carriage, can select the adjustment of stepping power, Advanced C/I scheduling algorithm for use; For the control of the power of base station, mainly based on the max power constraint condition with satisfy the descending C/I of each user and design in certain limit.
(5) judge module
Judge that whether executed candid photograph number of times is more than or equal to the predetermined number of times of capturing.
(6) statistics output module
Emulation must provide corresponding simulation result after accomplishing.Because its performance is judged with " user satisfaction criterion " in the provisional capital about during system emulation.Travelling carriage is added continuously, and the user's up to 95% C/I reaches satisfied C/I value (target C/I-0.5dB), and the user when 95% is satisfied, and this moment, supported number of users was the target capacity of system.
In emulation, can earlier given certain number user, survey user's satisfaction rate then.And change these numbers of users, the user up to 95% satisfied (reaching target C/I-0.5dB).This given number just is defined as the target capacity of system.
Under the situation of a plurality of wireless communication system coexistences; The inventor obtains the target capacity (under the situation of the interference that does not have other operators, obtaining) of interference source wireless communication system earlier; With second predetermined ratio of the target capacity of this interference source wireless communication system (for example; More than or equal to 70% and smaller or equal to 80%; Be preferably 75%) to insert number of users in the interference source wireless communication system as institute's emulation, then emulation by the interfere with wireless communications system in the target capacity that receives under the situation that above-mentioned interference source wireless communication system disturbs.Like this, can carry out needed statistical analysis according to measured simulation result.
The C/I value etc. that can comprise transmitting power, received power and the portable terminal uplink and downlink of portable terminal and base station in the simulation result.Output to simulation result in the destination file, can simulation result classified and is stored in for example public destination file, in the corresponding results files such as portable terminal destination file and base station end destination file.
Simulated effect
As an example, the inventor has carried out emulation with the interference between three kinds of different 3G wireless communication systems, and contrasts through the drive test result with reality, and the impact of performance of this invention is described.
The inventor is that scene is carried out emulation with three kinds of typical base station spacing distances: distance is 0 between operator, 288.5m (half of radius of society), 557m (radius of society).In reality, through road measuring device real network is detected then, testing result and simulation result are compared the validity that emulation mode of the present invention is described in the place of satisfying above condition.
Experiment situation one: WCDMA is to the interference simulation (FDD-FDD) of CDMA2000 system
During to the interference of CDMA2000 1x system, do not consider the interference of CDMA2000 1x at emulation WCDMA to the WCDMA system.Simulated environment is the Macro environment, and radius of society is the omni cell of 577m.The number of users of WCDMA system up-link is 75% of the satisfied users number that can support of single WCDMA system, promptly when emulation, remains WCDMA system noise rising 6dB.Carry out emulation according to the inventive method, the interference simulation result sees Fig. 8 and Fig. 9.
Can draw preliminary conclusion by Fig. 8 and simulation result shown in Figure 9, when the CDMA2000 system receives the WCDMA system interference:
A) .CDMA2000 system up-downgoing capacitance loss all reduces along with the increase of ACIR value.When if the radius of society size is 577m; Up link and down link for the CDMA2000 system; When ACIR >=50dB, no matter how the base station of two systems is planned and is disposed, and capacitance loss all tends to balance with the increase of ACIR value; And this moment, capacitance loss was controlled in 5% the scope, can ignore.
B). the distance between operator is very big to the influence of systematic function.When the distance between operator is 0 when being the cobasis station, the capacitance loss of up-downgoing is minimum, and the interference between operator is minimum; And the distance between operator when being 577m (radius of society) interference between operator maximum, the up-downgoing capacitance loss is also maximum.
C). in order to guarantee system capacity loss less than 5%, when radius of society was 577 meters, the ACIR of up link should be 47dB at least, and the ACIR of down link should be 40dB at least.
D). when CDMA2000 and the work of WCDMA neighboring trace; Though there is 3.75MHz in the carrier spacing of WCDMA and CDMA2000 1x; But the ACIR value of CDMA2000 up link is 33dB when frequency offset is 3.75MHz; It is thus clear that during at interval less than R/5, the WCDMA travelling carriage can not cause interference to the reception of CDMA2000 1x base station in the base station, but the base station is during at interval greater than R/5; The WCDMA travelling carriage will cause interference to the reception of CDMA2000 1x base station, disturbs size to increase and increase along with the base station spacing distance; In order to make ACIR reach 47dB, must make the ACLR of WCDMA travelling carriage apart from carrier wave 3.75MHz the time is 47dB/1.25MHz or the suitable protection bandwidth that increases.
E). the ACIR value of CDMA2000 down link is 46.3dB when frequency offset is 3.75MHz, so no matter the base station is spaced apart 0, when R/2 still is R, interference will can not caused to the travelling carriage of CDMA2000 in the WCDMA base station.
The inventor also uses drive test instrument and base station analyzer to carry out actual detected, and as ACIR during greater than 50dB, power system capacity is about 97%; And as ACIR during in the 40dB left and right sides, the capacity at cobasis station is near 100%, and the capacity of half radius of society of spacing is near 97%, and the capacity of a radius of society of spacing is near 90%.So operator's spacing is big more, capacitance loss is big more, and each item numerical value and conclusion and simulation result are in full accord, and visible, the fax result who obtains of facsimile method is very accurate according to the present invention.
Experiment situation two: the WCDMA travelling carriage is to the interference (FDD-TDD) of TD-SCDMA travelling carriage and base station
Since under the omnidirectional antenna technology when radius of society is 1500m and 3000m; The satisfied users number that the TD-SCDMA system on average inserts every sub-district is less than 1; Main cause is that covering is limited; So not emulation is not at radius not simultaneously, the WCDMA system is to the interference of TD-SCDMA system, and only the phase mutual interference of consideration two systems when radius all is 577m is big or small.
During to the interference of TD-SCDMA base station and travelling carriage, do not consider the interference of TD-SCDMA at emulation WCDMA travelling carriage to the WCDMA system.Simulated environment is the Macro environment, and radius of society is the omni cell of 577m.The number of users of WCDMA system up-link is 75% of the satisfied users number that can support of single WCDMA system, promptly when emulation, remains WCDMA system noise rising 6dB.The interference simulation result sees Figure 10 and Figure 11.
Can find out from simulation result by Figure 10 and Figure 11 can to draw as drawing a conclusion, when the WCDMA travelling carriage produces when disturbing TD-SCDMA base station and travelling carriage:
A) .TD-SCDMA system up-downgoing capacitance loss all reduces along with the increase of ACIR value, no matter but two system base-station spacing distances how, for the uplink downlink of TD-SCDMA system, ACIR can be set at arbitrary value, capacitance loss is all less than 5%.
B). the distance between operator has certain influence to systematic function.When the distance between operator is 0 when being the cobasis station, the capacitance loss of up-downgoing is minimum, and the interference between operator is minimum; And the distance between operator when being 577m (radius of society) interference between operator maximum, the up-downgoing capacitance loss is also maximum.
C). when TD-SCDMA and the work of WCDMA neighboring trace; Though there is 3.5MHz in the carrier spacing of WCDMA and TD-SCDMA; But the WCDMA travelling carriage is respectively 30.6dB and 30.8dB to the ACIR value of TD-SCDMA up link and down link when frequency offset is 3.5MHz; It is thus clear that be spaced apart 0 in the base station, when R/2 and R, the WCDMA travelling carriage all can not cause interference to the reception of TD-SCDMA travelling carriage and base station.
In actual detected, the inventor has tested multiple situation, no matter how much ACIR numerical value is, power system capacity satisfies the requirement that is not higher than 5% capacitance loss all more than 98%.So the travelling carriage of WCDMA can not cause interference to the travelling carriage of TD-SCDMA.Can find out on the concrete data of not associating that capacitance loss and operator's spacing still are directly proportional.Testing result is consistent with simulation result.
Experiment situation three: the interference coexistence (TDD-TDD) between the TD-SCDMA
Figure 12 and shown in Figure 13 be that two TD-SCDMA adopt when the up-downgoing capacitance loss of system is at the different base station spacing distance fully synchronously the time behind the intelligent antenna technology situation of change with ACIR.As can be seen from the figure, the performance of system significantly improves behind the intelligent antenna technology when system has adopted, and the interference between the two TD-SCDMA systems significantly reduces.
Be under 577 meters the situation, at radius of society no matter the base station spacing distance of two systems is much, as long as the ACIR value is controlled within 5% for 20dB can guarantee the up-downgoing capacitance loss of system.
In addition, the simulation result of up link and down link all shows the increase along with the base station spacing distance, and the interference between the system increases, and capacitance loss increases, but the difference amplitude is not very big.
When Figure 14 and Figure 15 show fully synchronously the up-downgoing capacitance loss of system when the different districts radius with the situation of change of ACIR.Visible from figure, radius of society is big more, disturbs also greatly more, and capacitance loss is also big more.When radius of society at 577 meters and 1500 meters, its system capacity loss trend is very similar, but when radius of society during greater than 3000 meters, changes greatlyyer, precedingly says that the result when radius is 3000 meters only did reference.If radius of society is not more than 1500m, guarantee that then ACIR is not less than 20dB, system still can not have the capacitance loss coexistence.
Two systems that more than analyzed are under the smart antenna situation, when the capacitance loss of system's uplink downlink fully synchronously the time.From can finding out here, when radius of society during less than 1500 meters, no matter the spacing distance of base station is much, as long as the ACIR value of system can satisfy the requirement of two coexistence of systems for 20dB.When the adjacent frequency of two systems was worked, the ACIR value of uplink downlink was all greater than 32dB, it is thus clear that when two TDD system synchronization, can coexist fully when the intercarrier distance is 1.6MHz.
In actual detected, the capacitance loss when double T D-SCDMA is synchronous, loss range are all in 5%, and the ACIR value that detects all is not less than 30dB, and capacitance loss and operator's spacing still are directly proportional, with the simulation result basically identical.
In addition; Alleged travelling carriage refers to that portable terminal, mobile phone, mobile intelligent terminal etc. are applicable to the terminal equipment of each generation communication wireless (the for example second generation and the third generation etc.) system among the present invention; The alleged base station of the present invention refers to that each is for the access device that is used for access terminal equipment in the wireless communication system; For example, in WCDMA, also be called B node (Node B).
In addition; Can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions, and, though logical order has been shown in flow chart; But in some cases, can carry out step shown or that describe with the order that is different from here.
Those skilled in the art should be understood that; Above-mentioned each module of the present invention or each step can realize that they can concentrate on the single calculation element with the general calculation device, perhaps are distributed on the network that a plurality of calculation element forms; Alternatively; They can realize with the executable program code of calculation element, thereby, can they be stored in the storage device and carry out by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.Though the execution mode that the present invention disclosed as above, the execution mode that described content just adopts for the ease of understanding the present invention is not in order to limit the present invention.
Claims (10)
1. a GSM disturbs the emulation mode that coexists, and it is characterized in that said emulation mode comprises the steps: at least
Step 10: generate simulated environment, in said simulated environment, arrange one or more base stations;
Step 20: in said simulated environment, arrange one or more static travelling carriages and confirm gain matrix G;
Step 30: said travelling carriage is accessed to the base station and carry out power control according to said gain matrix G, the quantity of the feasible travelling carriage that is inserted reaches the target capacity of said simulated environment;
Step 40: capture the simulation result of dbjective state,
Wherein,
Each element g among the said gain matrix G (i, value j) is the path loss in i travelling carriage and j the path that the base station constituted and the lognormal shadow fading sum on this paths;
I=(1,2,3 ..., M), the sequence number of each travelling carriage of representing to be arranged in the said simulated environment;
M is for total smaller or equal to the travelling carriage of in said simulated environment, arranging;
J=(1,2,3 ..., N), be illustrated in the sequence number of each base station of arranging in the said simulated environment;
N is smaller or equal to the total number of base of in said simulated environment, arranging;
Said dbjective state refers to the state when making that the travelling carriage more than first predetermined ratio is in satisfactory state in all travelling carriages inserted, the maximum quantity of the travelling carriage that said target capacity equals in the said simulated environment of said dbjective state, can to insert.
2. emulation mode according to claim 1 is characterized in that, also comprises:
Step 50: judge whether executed candid photograph number of times captures number of times more than or equal to predetermined, if judged result finishes emulation for being, otherwise, return step 20.
3. emulation mode according to claim 1 is characterized in that, also comprises:
Step 60: statistics is added up and exported to the simulation result of being captured.
4. according to each described emulation mode in the claim 1, it is characterized in that,
Said first predetermined ratio is more than or equal to 92% and smaller or equal to 98%; And
Said simulation result comprises the carrier/interface ratio of the uplink and downlink that each has inserted travelling carriage and the transmitting power separately and the received signal to noise ratio that have respectively inserted travelling carriage and the base station that each has been arranged at least.
5. according to each described emulation mode in the claim 1, it is characterized in that,
Travelling carriage is in the E that said satisfactory state refers to travelling carriage
b/ N
0More than or equal to target E
b/ N
0State during-0.5dB.
6. emulation mode according to claim 2 is characterized in that,
In step 20, each travelling carriage is distributed in the said simulated environment randomly, or sets each travelling carriage residing position in said simulated environment respectively, and
Rise after being arranged in the comfortable step 20 of the travelling carriage of being arranged and keep motionless between tailend to step S40.
7. according to each described emulation mode in the claim 1 to 6, it is characterized in that, under the situation of a plurality of wireless communication system coexistences,
Step 10 also comprises: emulation interference source wireless communication system; Make and in said interference source wireless communication system, insert the travelling carriage that quantity is second predetermined ratio of the target capacity of said interference source wireless communication system under the situation that no any interference source wireless communication system disturbs; Wherein
Said second predetermined ratio is more than or equal to 70% and smaller or equal to 80%.
8. emulation mode according to claim 7 is characterized in that step 40 also comprises:
Confirm said by the target capacity under the situation that receives above-mentioned interference source wireless communication system interference of interfere with wireless communications system and the relation curve of ACIR; Draw when equaled said ACIR value during by the 3rd predetermined ratio of the target capacity of interfere with wireless communications system under the situation that no any interference source wireless communication system disturbs by the target capacity of interfere with wireless communications system by this relation curve
Wherein said the 3rd predetermined ratio is more than or equal to 92% and smaller or equal to 98%.
9. emulation mode according to claim 1 is characterized in that,
In the step 30, according to gain matrix G, with i travelling carriage be linked into g (i, k) pairing base station, wherein, g (i, value k) is g (i, 1), g (i, 2), g (i, 3) ..., g (i, the maximum in N).
10. a GSM disturbs the simulator that coexists, and it is characterized in that said emulation mode comprises like lower unit at least:
Initialization unit generates simulated environment, in said simulated environment, arranges one or more base stations;
The travelling carriage arrangement unit is arranged one or more static travelling carriages and is confirmed gain matrix G in said simulated environment;
Radio resource managing unit accesses to the base station with said travelling carriage and carries out power control according to said gain matrix G, and the quantity of feasible each travelling carriage that is inserted reaches the target capacity of said simulated environment;
Capture the unit, capture the simulation result of dbjective state,
Wherein,
Each element g among the said gain matrix G (i, value j) is the path loss in i travelling carriage and j the path that the base station constituted and the lognormal shadow fading sum on this paths;
I=(1,2,3 ..., M), the sequence number of each travelling carriage of representing to be arranged in the said simulated environment;
M is for total smaller or equal to the travelling carriage of in said simulated environment, arranging;
J=(1,2,3 ..., N), be illustrated in the sequence number of each base station of arranging in the said simulated environment;
N is smaller or equal to the total number of base of in said simulated environment, arranging; And
Said dbjective state refers to the state when making that the travelling carriage more than first predetermined ratio is in satisfactory state described in all travelling carriages inserted, the maximum quantity of the travelling carriage that said target capacity equals can to insert in the said simulated environment of said dbjective state.
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