CN1780178B

CN1780178B - Wireless communication shielding identification method and system

Info

Publication number: CN1780178B
Application number: CN2004100950797A
Authority: CN
Inventors: 简呈豪
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-23
Filing date: 2004-11-23
Publication date: 2011-05-04
Anticipated expiration: 2024-11-23
Also published as: CN1780178A

Abstract

A wireless communication shielding identification method is applied to a wireless communication system. When the cumulative number of signal state evaluation values obtained by a synchronization program reaches a default value, a Poincare diagram is formed with the phase parameters of the signal state evaluation values. If the points formed by the phase parameters are not distributed along the first diagonal line (y=x) with a slope of positive value 1 or two parallel lines parallel to the first diagonal line in the Poincare diagram, it is judged that the signal transmission path is shielded, so as to achieve effective identification of shielding.

Description

Wireless telecommunication shielding discrimination method and system

Technical field

The present invention relates to a kind of wireless communications method and system, particularly relate to a kind of wireless telecommunication shielding discrimination method and system, to realize differentiating in real time various shieldings.

Background technology

In recent years, because that radio communication has mobility is good and be not subjected to convenience such as communication position restriction, makes people get used to employing wireless communication already and come and other people communication.For instance, such as mobile phone one one of staff almost, and wireless network card more becomes the basic building block of present novel electron equipment.

When wireless propagation path owing to various types of interference (such as building) when being blocked, significant signal power losses can appear, this phenomenon is called decay, it is considered to very important phenomenon in the radio communication.Decay mainly comprises two kinds of forms, and a kind of is quick decay, and another kind is long-time decay (long-time fading).Long-time decay is called shielding again.Some device is overcome quick decay by invention, for example error correction coding (error control coding) and re-transmission (retransmission) or the like.Even in voice channel, do not understand Content of Communication owing to can not influence people usually, decay can be ignored fast.And owing to perhaps can continue one period long period and can cause unexpected broken string, so shielding can't be ignored.

For guaranteeing the radio communication quality, signal receiving device in subscriber terminal equipment such as mobile phone or the system service terminal equipment such as the base station can regularly be carried out a synchronization program (synchronization process) and obtain one group of Channel Transmission state estimation value that comprises power parameter and phase parameter, suffers the signal of extraneous transmission path influence with correction.Existing communication system service terminal equipment mostly is that communication quality is judged on the basis with the power parameter, and judge whether to carry out switching (Handoff) between the base station, until now, the phase parameter that causes owing to practical communication changes that too complicated that it is difficult to is analyzed.For instance, mobile phone can send to signal period property the base station with continuous action (Keep alive) still, and this mobile phone can be given by confirmation signal of passback after receiving in the base station.But when the transmission path between mobile phone and base station is stopped and is shielded, can't receive that the mobile phone of confirmation signal can be automatically be increased to maximum with the transmitted power of (Keep alive) signal of continuous action, and the spacing frequency that sends also is adjusted to the highest, thereby consume limited electric power in a large number., when transmission path took place to shield fully, when for example mobile phone was positioned at elevator, above-mentioned work was to consume electric power meaninglessly, and can't improve communication quality.

Therefore, the inventor considers and utilizes phase parameter to differentiate transmission path situation of living in conjunction with Peng Jiale figure (Poincare Map), and then effectively differentiate that shielding takes place, thereby effectively help subscriber terminal equipment to switch with the system service terminal equipment early or carry out respective handling.

Summary of the invention

One object of the present invention is to provide a kind of wireless telecommunication shielding discrimination method and system that realizes effectively differentiating shielding.

Another object of the present invention is to provide a kind of wireless telecommunication shielding discrimination method and system that realizes improving communication quality.

Another purpose of the present invention is to provide a kind of wireless telecommunication shielding discrimination method and system that realizes switching in real time.

A further object of the present invention is to provide a kind of wireless telecommunication shielding discrimination method and system that realizes effectively saving electric power.

Therefore, according to wireless telecommunication shielding discrimination method of the present invention, this method is used for a wireless communication system, this wireless communication system has a sender unit and a signal receiving device, during communication, this signal receiving device fixed cycle (cycle according to the communication protocol of use and difference) carry out a synchronization program with proofread and correct its with this sender unit between the communicating by letter of signal transmission path, synchronization program obtains a signal condition assessed value each time, this signal condition assessed value has a phase parameter and a power parameter, the synchronization program of generation regularly and accumulated signal state estimation value in time, the method includes the steps of:

(A) when the cumulative number of signal condition assessed value reaches a default value, form a Peng Jiale figure with the phase parameter of this kind signal condition assessed value; And

(B) if this kind phase parameter is not first diagonal (y=x) or two parallel lines parallel with this first diagonal (y=x-C and y=x+2 π-C on the occasion of 1 along the slope among this Peng Jiale figure; C is arbitrary constant) near when distributing, judge that then this signal transmission path is in the shielding.

Description of drawings

The present invention is described in detail below by most preferred embodiment and accompanying drawing, in the accompanying drawing:

Fig. 1 is a structure chart according to the preferred embodiment of the wireless communication system with wireless telecommunication shielding identification function of the present invention;

Fig. 2 is the schematic diagram of an example of wireless communications environment in the present embodiment;

Fig. 3 is the flow chart of the discrimination method among the embodiment among Fig. 1;

Fig. 4 is the flow chart of the phase parameter routine analyzer among Fig. 3;

Fig. 5 is the example Peng Jiale figure under normal circumstances among Fig. 2;

Fig. 6 is the Peng Jiale figure of example when partly shielding effect among Fig. 2;

Fig. 7 is that the example among Fig. 2 is schemed at the Peng Jiale of degree of depth shielding;

Fig. 8 be in the present embodiment Peng Jiale figure with the schematic diagram of an example of the oblique line zoning of many positive slopes;

Fig. 9 is the distribution map of counting in each zone among Fig. 8; And

Figure 10 be in the present embodiment Peng Jiale figure with the schematic diagram of an example of the oblique line zoning of many negative slopes.

Detailed Description Of The Invention

Fig. 1 shows among the present invention to have the wireless communication system of wireless telecommunication shielding identification function and the preferred embodiment of method.This wireless communication system has a plurality of system service terminal equipments 5 and a plurality of subscriber terminal equipment 6.Each system service terminal equipment 5 and subscriber terminal equipment 6 respectively have a sender unit 1 ', 1 and signal receiving device 2 ', 2.For convenience of description, the setting wireless communication system is a mobile phone communication system in the present embodiment, and is that example illustrates present embodiment with signal transmission path between the sender unit 1 ' of signal receiving device in the subscriber terminal equipment 62 and system service terminal equipment 5.In addition, though the wireless communication system in the present embodiment discloses a plurality of system service terminal equipments 5 and a plurality of subscriber terminal equipments 6, yet those of ordinary skills will be appreciated that, in wireless communication system, also can only have individual system service terminal equipment 5 and unique user terminal equipment 6, be not limited to the disclosed content of present embodiment.

System service terminal equipment 5 is base stations that service provider sets up, so that radio communication service to be provided.Yet those of ordinary skills should be understood that to have a plurality of base stations in wireless communication system, and to cover different range for wireless communication respectively, these scopes can have overlapping.Therefore, subscriber terminal equipment 6 is when mobile, and the signal system service terminal equipment 5 that communicates with may be different, and the process of this transformation system service terminal equipment is called switching.In addition, those of ordinary skills will be appreciated that, the title of base station is different with the difference of mobile phone communication system standard, claim that as 3G the base station is Node-B, and 2G claims MS (Mobile Station), again if wireless communication system is when being wireless network, its system service terminal equipment then be access point (AccessPoint, AP).Subscriber terminal equipment 6 is radio telephone or wireless network card.

Signal receiving device 2 comprises a main system 21 and an identification module 22.Main system 21 is used to receive and send messages and carries out a synchronization program constantly.Each synchronization program can obtain a signal condition assessed value, with assess its with corresponding sender unit 1 ' between communication quality.

When communication system is in holding state, the main system 21 of signal receiving device 2 still can continue to carry out synchronization program in subscriber terminal equipment 6, subscriber terminal equipment 6 meetings this moment send (Keep alive) signal of a continuous action and give system service terminal equipment 5, after system service terminal equipment 5 is received in theory, sender unit 1 ' can be given subscriber terminal equipment 6 by confirmation signal of passback, thereby under the situation that signal transmission path does not suffer seriously to stop, the main system 21 of signal receiving device 2 can be received the affirmation signal from 5 passbacks of system service terminal equipment in the subscriber terminal equipment 6.The signal condition assessed value that synchronization program is analyzed has a phase parameter and a power parameter.Those of ordinary skills should know, main system 21 also can be carried out the basic function of other mobile phone, and since synchronization program be sender unit 1,1 ' and signal receiving device 2,2 ' between program, thereby the signal receiving device 2 ' in the system service terminal equipment 5 also can be not limited to the disclosed content of present embodiment in conjunction with carrying out synchronization program with sender unit 1 in the subscriber terminal equipment 6.When wireless communication system was wireless network, subscriber terminal equipment 6 was a wireless network card again.

Wherein, owing to the function of sender unit 1 ' with main system 21 is well known to those of ordinary skill in the art and is not improvement emphasis of the present invention, thereby not in this description.The signal receiving device 2 that is present embodiment with existing signal receiving device difference also has identification module 22.Before introducing identification module 22 in detail, introduce a simulated experiment in conjunction with Fig. 2 earlier, to understand the basis of the discrimination method described in the present invention.

Building with right angle 31, a receiver 32 and a transmitter 33 that is positioned at building 31 opposite sides that is positioned at building 31 1 sides are arranged in Fig. 2, the vertical range that receiver 32 and transmitter are 33 is about 30 meters, and the fixed-site of receiver 32 and transmitter 33 can move to right 35 meters.In the moving process of transmitter 33, the existence meeting of building 31 exerts an influence to the signal reception of receiver 32, thereby its moving process is divided into 4 situations, first kind of situation is normal condition (situation 1), and transmitter 33 still can be launched ground wave and disturbed by building 31.Second kind of situation is partly shielding effect (situation 2), and receiver 32 is shielded with the signal transmission path of transmitter 33.The third situation is degree of depth shielding (situation 3), and receiver 32 suffers more serious shielding with the signal transmission path of transmitter 33, but receiver 32 still can be received the signal from transmitter 33.The 4th kind of situation is shielding (situation 4) fully, surpasses 35 meters when transmitter 33 continues to move to right, and this moment, signal transmission path shielded fully, and the signal that receiver 32 is received is entirely white noise.In this experiment, be that the signal of 2.4GHz is that example is measured with the frequency, transmitter 33 is constantly transmitted, and receiver 32 continue received signals, draw Peng Jiale figure with the phase parameter of the state estimation value of obtaining receiver 32 received signals.

After experiment, when signal receiver 32 is in normal condition (situation 1), phase parameter distributes as shown in Figure 5 among its Peng Jiale figure, is that slope is 1 a diagonal (referring to first diagonal) or also can be along two parallel lines parallel with first diagonal (y=x-C and y=x+2 π-C; C is arbitrary constant) distribute (figure does not show).When signal transmitter 33 was in partly shielding effect (situation 2), the formed point of phase parameter was distributed among whole Peng's Galle figure (as Fig. 6) on the contrary more equably.When signal transmitter 33 was in degree of depth shielding (situation 3), the point that most of phase parameter constituted concentrated among the Peng Jiale figure near (as the Fig. 7) of a bit.When signal transmitter 33 was in fully shielding (situation 4), its Peng Jiale figure was that the Peng Jiale figure (as Fig. 6) during with partly shielding effect (situation 2) is identical, and the formed point of phase parameter also is distributed among whole Peng's Galle figure more equably.Hence one can see that, signal transmission path when between signal receiving device 2 and sender unit 1 ' environment of living in is not simultaneously, the difference to some extent that distributes also of the phase parameter among its corresponding Peng Jiale figure that produces then, therefore the identification module in the present embodiment 22 is analyzed the distribution scenario of phase parameter on Peng Jiale figure, with the residing environment of the signal transmission path between distinguishing signal receiving system 2 and sender unit 1 '.

Identification module 22 in the present embodiment has a mapping unit 221 and a judging unit 222.

Mapping unit 221 can obtain the signal phase parameter that each synchronization program obtains, to draw a Peng Jiale figure.Could correctly judge the distribution of phase parameter on Peng Jiale figure owing to need abundant phase parameter, so the signal cumulative number on mapping unit 221 has reached one during such as 201 default value, promptly the synchronization program number of times of start back execution reaches this default value, utilizes the phase parameter of these signals to form a Peng Jiale figure.Generally in the 3G system, carry out 16 subsynchronous programs for about 10 milliseconds, in gsm system, about 16 milliseconds of execution once.Specifically, mapping unit 221 be according to the precedence of time utilize respectively two adjacent phase parameter values indicate among the Peng Jiale figure a bit.201 phase parameter θ are for example arranged ₁～θ ₂₀₁The time, then to draw the position successively on Peng Jiale figure be (θ to mapping unit 221 ₁, θ ₂), (θ ₂, θ ₃), (θ ₃, θ ₄) ... (θ ₂₀₀, θ ₂₀₁) each point, totally 200 points.When new synchronization program is performed, and obtain the phase parameter θ of a new signal _jThe time, according to the principle of first in first out, with phase parameter θ last time _J-1Form a new point, (θ _J-1, θ _j), and remove time point the earliest, even always counting is N, then removes (θ _J-1-N, θ _J-N).

Judging unit 222 is used to analyze the formed distribution scenario on Peng Jiale figure of these phase parameters, and then judge the residing environment of signal transmission path, for example normal condition (situation 1), partly shielding effect (situation 2), the degree of depth shield (situation 3) or shielding (situation 4) fully.Judging unit 222 is to distribute and carry out analysis and judgement by analyzing point that these phase parameters constitute in the present embodiment.In addition, though partly shielding effect (situation 2) distributes identical with the phase parameter of shielding (situation 4) fully, but it is obviously different in situation 2, the situation 4 at the power parameter value that synchronization program obtained, power when the power of shielding when (situation 4) is much smaller than partly shielding effect (situation 2) fully, so judging unit 222 further utilizes power parameter to distinguish out partly shielding effect (situation 2) and shielding (situation 4) fully.In addition, in existing part communications applications, the white noise average power P in the communication equipment meeting statistical environment such as subscriber terminal equipment 6 or system service terminal equipment 5 _w, and after indoor use a period of time, walk out suddenly when outdoor when communication equipment, outdoor sunlight can cause white noise power to raise, so communication equipment is calculating average power P _wThe time, also can calculate a variable quantity.Present embodiment adopts white noise average power P _wPermissible range (it is at white noise average power P _wAdd up centrifugal pump and average power P _wDeduct between the centrifugal pump) as judgment standard.Power parameter is not if fall within white noise average power P _wPermissible range in, then be judged as partly shielding effect (situation 2); If power parameter value falls within white noise average power P _wPermissible range the time, then be judged as fully shielding (situation 4).

According to said structure and function, the execution flow process of method in this enforcement is described in conjunction with Fig. 3.Wherein set subscriber terminal equipment 6 starts, the phase parameter of the signal condition assessed value of main system 21 performed synchronization programs acquisitions can send to mapping unit 221 then.

At first, in step 41, mapping unit 221 judges at first whether the cumulative number of synchronization program has reached default value, and whether the quantity of the phase parameter of the signal condition assessed value that promptly synchronization program obtained has reached default value.If reach default value, then execution in step 42.Otherwise if do not reach default value, rebound step 41 then is till cumulative number reaches default value.

Secondly, in step 42, mapping unit 221 uses these phase parameters to draw Peng Jiale figure.It should be noted that mapping unit 221 also can just begin to draw Peng Jiale figure when receiving phase parameter, but when the quantity of phase parameter meets the quantity default value, just finish the drafting of Peng Jiale figure.

And then, in step 43, judging unit 222 is analyzed the distribution of phase parameter among the Peng Jiale figure, to judge the residing environment of signal transmission path (being described after a while) between signal receiving device 2 and the sender unit 1 '.

Then, in step 44, judge whether that a new synchronization program is performed, promptly whether have a new phase parameter to exist.If have, then execution in step 45, form a new point on the Peng Jiale figure with this new phase parameter and last phase parameter, with replacement time point the earliest.After step 45 finished, program can rebound step 43, was formed a little distribution to reanalyse phase parameter.If be judged as in step 44 when no, then execution in step 46, judge whether to finish to communicate by letter continuing.When step 46 is judged as end communication, then finish.On the contrary, if be judged as when no in the step 46, rebound step 44 then.Those of ordinary skills should be understood that the step 44 that judges whether new synchronization program and the execution sequence of the step 46 that judges whether to shut down can revise according to design requirement, also can carry out simultaneously, are not limited to the disclosed mode of present embodiment.

Secondly, cooperate Fig. 4 to introduce the analysis process that the phase parameter among 222 couples of Peng Jiale figure of judging unit distributes.

At first, in step 431, judging unit 222 judges whether phase parameter evenly distributes on Peng Jiale figure.If step 431 is judged as when being execution in step 432.On the contrary, if step 431 is judged as when denying, then execution in step 437.

In step 432, judging unit 222 continues to judge whether power parameter does not fall within white noise average power P _wPermissible range in.If step 432 is judged to when being, then execution in step 433.On the contrary, if step 432 is judged as when denying, then execution in step 435.

In step 433, because phase parameter is evenly distributed on Peng Jiale figure and power parameter does not fall within white noise average power P _wPermissible range in, then judging unit 222 distinguishing signal transmission paths are in partly shielding effect (situation 2).After step 433 finishes, execution in step 434, judging unit 222 is notified to main system 21 with the information that relevant signal transmission path is in partly shielding effect (situation 2).Thus, subscriber terminal equipment 6 can be in another communication quality the signal transmission path reservation ahead of time of normal condition (situation 1) and give subscriber terminal equipment 6, for example preengage another system service terminal equipment 5 or signaling channel, changing by the preferable signal transmission path of another communication quality carry out to switch provides communication service, to keep communication quality.Perhaps, if there is not the signal transmission path that other communication quality is in normal condition (situation 1), subscriber terminal equipment 6 can be prepared interrupt communication.After step 434 finishes, skip to step 442.

In step 435, power parameter falls within white noise average power P because phase parameter is evenly distributed on Peng Jiale figure _wPermissible range in, so judging unit 222 distinguishing signal transmission paths are in fully shielding (situation 4).After step 435 finishes, execution in step 436, judging unit 222 is notified to main system 21 to the information that relevant signal transmission path is in the shielding (situation 4) fully.Thus, can make subscriber terminal equipment 6 coordinate ready signal with system service terminal equipment 5 interrupts, promptly can suspend communication, the for example transmission of the signal of the emission of stop signal and continuous action (Keep Alive), till signal receiving device 2 is received signal from sender unit 1 ' again, be that phase parameter that signal receiving device 2 is judged as synchronization program recovers when belonging to normal condition (situation 1) or partly shielding effect (situation 2) again, to save the limited electric power of communication equipment.After step 436 finishes, execution in step 442.

In step 437, judging unit 222 continue to judge the formed point of phase parameter whether accumulate in a specified point near.If be judged as in step 437 is that then execution in step 438.On the contrary, if be judged as not in the step 437, then execution in step 440.

In step 438, judging unit 222 identifies signal transmission path and is in the degree of depth shielding (situation 3).After step 438 finishes, continue execution in step 439, be notified to main system 21 with the information that relevant signal transmission path is in the degree of depth shielding (situation 3).Thus, main system 21 can be attempted the signal transmission path that other is available (being other system service terminal equipment 5 or signaling channel) reservation and be given subscriber terminal equipment 6 or signaling channel, seeks whether there is the system service terminal equipment 5 that meets normal condition (situation 1) earlier.If when existing, then changing by it provides communication service.If when no, seek whether there be system service terminal equipment 5 or the signaling channel that meets partly shielding effect (situation 2) again.If when existing, changing by it provides communication service.If do not have other available system service terminal equipment 5 or signaling channel, main system 21 can make subscriber terminal equipment 6 and system service terminal equipment 5 coordinate the ready signal interruption, the emission that promptly can halt signal and the transmission of continuous action signal, receive signal from sender unit 1 ' again until signal receiving device 2, be that phase parameter that signal receiving device 2 is judged as synchronization program recovers when being normal condition (situation 1) or partly shielding effect (situation 2) again, to save the especially limited electric power of subscriber terminal equipment 6 of communication equipment.After step 439 finishes, execution in step 442.

In step 440, judging unit 222 judges that whether these phase parameters are near distributions 1 first diagonal (y=x) or two parallel lines parallel with this first diagonal along slope.If being judged as in the step 440 is that then execution in step 441 distinguishing signal transmission paths are in normal condition (situation 1).On the contrary, if be judged as when denying in the step 440, then execution in step 442.After step 441 finishes, execution in step 442.

In step 442, signal receiving device 2 judges whether subscriber terminal equipment 6 uses other signal transmission path.If be judged as in the step 442 be, then need obtain phase parameter again,, analyze thereby finish this to form new Peng Jiale figure.On the contrary, if be judged as not in the step 442, then execution in step 443, to judge whether to finish communication.

Need to finish communication if in step 443, judge, then directly finish to analyze.On the contrary, do not need to finish communication if step 443 is judged, then rebound step 431 continues to analyze the distribution of phase parameter among the Peng Jiale figure with the new phase parameter that produces according to new synchronization program.

Judging unit 222 in the present embodiment can utilize Largest Lyapnov Exponent (LLE) and regression analysis (Regression Analysis) or the like mode to calculate.In order to allow the present invention be more readily understood, introduce an example that calculates in the judging unit 222.

At first, as shown in Figure 8, utilize the oblique line parallel with diagonal (being y=x) that the plane of 2 π among the Peng Jiale figure * 2 π is cut into odd number (N) homalographic zone, handle is decided to be X successively with the position that X-axis intersects earlier ₁, X ₂X _nX _NReach the position of intersecting and be decided to be Y successively with Y-axis ₁, Y ₂Y _nY _N, then successively the right-hand zone of diagonal is denoted as S ₁, S ₂S _nS _N, and the left zone is denoted as S ₂', S ₃' ... S _n' ... S _N', then along double-head arrow 51 from the upper left side to lower right S _N' ... S _n' ... S ₂', S ₁, S ₂S _nS _NCalculate counting in each zone, as shown in Figure 9 distribution map draws.Suppose that counting in each zone is E (S _n), then dispersion ratio is shown below:

[E _MAX(S _j)-E _MIN(S _k)+E _MAX2(S _j)-E _MIN2(S _m)]/M

Wherein M is for always counting E _MAX(S _j) be maximum among the E, E _MIN(S _j) be minimum value among the E, E _MAX2(S _l) be second maximum, E _MIN2(S _m) be second minimum value.The N value that the plane is divided into N of homalographic zone is decided by the signal sampling frequency F in the synchronization program, and promptly F afterwards multiply by 2 after the numerals divided by 6 unconditional fractions omitted points and adds 1 again, and formula is

Thus, according to the Region Segmentation mode of above-mentioned formula and Fig. 8, can obtain the limit dispersion ratio V of normal condition (situation 1) ₁, promptly have a few all be distributed in diagonal or with two parallel lines parallel (y=x-C and y=x+2 π-C with diagonal; C is arbitrary constant) limiting case when going up, this limit dispersion ratio V ₁Be 1.And at the limit dispersion ratio V of partly shielding effect (situation 2) ₂, the situation of a mean allocation on the Peng Jiale figure of 2 π * 2 π promptly arranged, when just being divided into 2 π * 2 π with the identical M homalographic of counting regional, each zone just respectively has a point, this moment limit dispersion ratio V ₂Be 0.Then, the limit dispersion ratio V of degree of depth shielding (situation 3) ₃, can be considered the situation that all accumulates in certain point on the Peng Jiale figure of having a few, at this moment limit dispersion ratio V ₃Also be 1, last, the performance of the limit dispersion ratio of situation 4 is identical with situation 2, thereby V ₄Performance and V ₂Identical.

Therefore, as shown in figure 10, be divided into the zone (referring to second area) of N homalographic again along the oblique line that is parallel to the diagonal (y=-x) of negative slope, with another distribution map that draws.Then, come calculating limit dispersion ratio V in area distribution mode shown in Figure 10 in conjunction with above-mentioned formula ₁, V ₂, V ₃, the limit dispersion ratio V of normal condition (situation 1) ₁Be 0, the limit dispersion ratio V of partly shielding effect (situation 2) ₂Still be 0, the limit dispersion ratio V of degree of depth shielding (situation 3) ₃Be that 1 limit dispersion ratio that reaches shielding (situation 4) fully is 0.As shown in the table:

	V ₁	V ₂	V ₃	V ₄
					Divide Peng Jiale figure along the positive slope oblique line	1	0	1	0
Divide Peng Jiale figure along the negative slope oblique line	0	0	1	0

Then, judging unit 222 is according to above-mentioned limit dispersion ratio V ₁, V ₂, V ₃, V ₄Set the first critical value M ₁With the second critical value M ₂, to use in the actual discrete rate that in positive and negative slope oblique line zoning, calculates respectively.For example, set the first critical value M that uses for the actual discrete value that in positive slope oblique line zoning, calculates ₁Be 0.2, and the second critical value M that uses for the actual discrete value that in negative slope oblique line zoning, calculates ₂Be 0.1.

Thus, judging unit 222 is asked for positive actual discrete rate Vp according to the positive slope oblique line zoning of (as Fig. 8) earlier, again with this actual discrete rate and the first critical value M ₁Relatively, if positive actual discrete rate Vp is not more than the first critical value M ₁, then representing the distribution that this moment, phase parameter formed a little is similar being evenly distributed, thereby further its power parameter P _pWith white noise average power P _wPermissible range relatively, be still shielding (situation 4) fully of partly shielding effect (situation 2) to distinguish it.

But if positive actual discrete rate Vp is greater than the first critical value M ₁, then may be normal condition (situation 1) or degree of depth shielding (situation 3).Therefore, judging unit 222 is negative 1 oblique line again according to (as Figure 10) slope, asks for negative actual discrete rate V according to the method zoning identical with the positive slope oblique line _P'.If negative actual discrete rate V _P' be not more than the second critical value M ₂The time, then be judged to be normal condition (situation 1).If negative actual discrete rate V _P' greater than the second critical value M ₂The time, then be judged to be degree of depth shielding (situation 3).Above-mentioned judgment rule can be represented as following relational expression:

V _P≤ M ₁The time, if P _P＞P _w, then be judged as partly shielding effect (situation 2); And if P _p≤ P _w, then be judged as shielding (situation 4) fully;

V _p＞M ₁And V _p'≤M ₂, then be judged as normal condition (situation 1); And

V _p＞M ₁And V _p'＞M ₂, then be judged as degree of depth shielding (situation 3).

Thus, judging unit 222 can be judged the residing environment of signal transmission path according to the account form of above-mentioned example.In addition, for improving the accuracy of judging, present embodiment judging unit 222 is also judged in conjunction with other algorithm that uses power parameter to carry out the channel status assessment except that using phase parameter.

It should be noted, the identification module 22 of present embodiment can be a program or a firmware, even be a hardware circuit, it also can be in conjunction with realizing in main system 21, maybe can be recorded in the program on the Storage Media, just it is downloaded in the signal receiving device 2 when to be used, in addition, identification module 22 also can be combined in the signal receiving device 2 ' of system service terminal equipment 5, make system service terminal equipment 5 identify signal transmission path when shielding, preparing to switch to by other system service terminal equipment 5 rapidly provides signal transmission path.

In sum, the present invention can effectively be judged as that signal receiving device 2 is in normal condition (situation 1), partly shielding effect (situation 2), degree of depth shielding (situation 3) by the distribution form of analyzing phase parameter or fully one of in the shielding (situation 4), to reach the effect of effective discriminating shielding.In addition, identification module 22 can also be notified to the information of the shielding judged the main system 21 of signal receiving device 2, makes main system 21 give subscriber terminal equipment 6 with the reservation ahead of time of another available transmission paths, switch and improve communication quality early to reach.Perhaps, main system 21 can make subscriber terminal equipment 6 and system service terminal equipment 5 coordinate the emission of temporary transient interrupt signal, to reach the limited electric power of effective saving subscriber terminal equipment 6.

Claims

1. A wireless communication shielding identification method, applied in a wireless communication system, the wireless communication system has a signal sending device and a signal receiving device, and the signal receiving device regularly executes a synchronization program to evaluate its relationship with the signal sending device The communication quality of the signal transmission path between each synchronization procedure obtains a signal state evaluation value, the signal state evaluation value has at least one phase parameter and one power parameter, and the signal state evaluation value is accumulated by the synchronization procedure that occurs regularly over time, its It is characterized in that the method comprises the following steps:

(A) when the accumulated times of the signal state evaluation value reach a default value, a Poincare diagram is formed with the points formed by the phase parameter of the evaluation value; and

(B) If the point formed by the phase parameter is not along the first diagonal line y=x of positive value 1 or two parallel lines parallel to the first diagonal line y= If x-C and y=x-C+2π are distributed around, it is judged that the signal transmission path is in shielding, where x and y represent the abscissa and ordinate of the Poincare diagram respectively, and C is an arbitrary constant.

2. The identification method as claimed in claim 1, characterized in that:

In the step (B), if the point formed by the phase parameter is not along the first diagonal line whose slope is a positive value of 1 in the Poincare diagram or two lines that are not in line with the second Diagonal lines parallel to the parallel lines are distributed near and evenly distributed in the Poincare diagram, and their power parameter values do not fall within the allowable range of a white noise average power, then it is identified that the signal transmission path is in Partially blocked.

3. The identification method as claimed in claim 1, characterized in that:

In the step (B), if the point formed by the phase parameter is not along the first diagonal line whose slope is positive value 1 in the Poincare diagram or two pairs with the first The parallel lines that are parallel to the angled lines are distributed near the parallel lines and concentrated around a specific point, so that the signal transmission path is identified as being in the deep shield.

4. The identification method as claimed in claim 1, characterized in that:

In the step (B), if the point formed by the phase parameter is not along the first diagonal line whose slope is positive value 1 in the Poincare diagram or two pairs with the first Diagonal lines parallel to the parallel lines are distributed and evenly distributed in the Poincare diagram, and the power parameter value falls within the allowable range of the average power of white noise, then it is identified that the signal transmission path is completely shielded .

5. The identification method as claimed in claim 1, 2, 3 or 4, characterized in that:

The step (B) is to judge the distribution of the phase parameters by calculating the dispersion rate of the points formed by the phase parameters.

6. identification method as claimed in claim 5, is characterized in that described step (B) comprises the following steps:

(B1) dividing the Poincare diagram into an odd number of equal-area first regions with a plurality of oblique lines with a slope of 1;

(B2) calculating the positive actual dispersion rate of the points formed by the phase parameters in the Poincare diagram in the first region; and

(B3) If the positive actual dispersion rate is not greater than the first critical value, and its power parameter value does not fall within the allowable range of a white noise average power, it is judged that the signal transmission path is partially shielded; if the power parameter If the value falls within an allowable range of the average power of white noise, it is determined that the signal transmission path is completely shielded.

7. The identification method as claimed in claim 6, characterized in that:

The first critical value depends on the first limit dispersion rate and the second limit dispersion rate determined corresponding to the first region, and the first limit dispersion rate is that the points formed by the phase parameters are evenly located on the first diagonal line The second limit dispersion rate is the dispersion rate when the points formed by the phase parameters are evenly distributed in each of the first regions.

8. The identification method as claimed in claim 7, characterized in that:

The step (B) also includes a step (B4), if the positive actual dispersion rate is greater than the first critical value, the Poincare diagram is re-divided into odd numbers with a plurality of oblique lines with a slope of -1 a second area of equal area, then calculate the negative actual dispersion rate of the points formed by the phase parameters in the second area, and if the negative actual dispersion rate is not greater than the second critical value, then judge the signal transmission path In a normal situation, on the contrary, it is judged that the signal transmission path is in deep shielding.

9. The identification method as claimed in claim 8, characterized in that:

The second critical value depends on the first limit dispersion rate and the third limit dispersion rate determined corresponding to the second region, the first limit dispersion rate is formed by the phase parameters in the second region The points are uniformly located on the first diagonal line, and the third limit dispersion rate is the dispersion rate at which the points formed by the phase parameters in the second region are concentrated at a specific point.

10. The identification method as claimed in claim 1, characterized in that:

The communication system also includes a system service terminal device and a user terminal device for wirelessly sending and receiving information through the system service terminal device, the system service terminal device and the user terminal device respectively have the signal receiving device and the signal sending device , wherein, in the step (B), when it is judged that the signal transmission path is in the shield, notify the communication system where the signal receiving device and the signal sending device are located, execute a switching procedure or a temporary Terminate the communication program.

11. The identification method as claimed in claim 8, characterized in that:

The number of the first area and the second area is equal to the frequency at which the signal receiving device executes the synchronization procedure divided by a first default value which is a multiple of 2, rounded up, multiplied by 2 and then added to 1.

12. The authentication method according to claim 11, characterized in that:

The first default value is equal to 6.

13. A signal receiving device with a wireless communication shielding identification function, applied in a wireless communication system, the wireless communication system also has a signal sending device for wireless communication with the signal receiving device, the signal receiving device includes:

A main system is used to send and receive information and regularly execute a synchronization program to evaluate the communication quality of the signal transmission path between it and the signal sending device. Each synchronization program obtains a signal status evaluation value, and the signal status evaluation value has at least one phase parameter and a power parameter; and

A discrimination module is used to form a Poincare diagram with the points formed by the phase parameter of the signal state evaluation value when the number of the signal state evaluation value reaches a default value, and when it is identified that the phase parameter is not along the When the slope in this Poincare diagram is the first diagonal y=x of positive value 1 or two parallel lines y=x-C and y=x-C+2π parallel to the first diagonal are distributed near the first diagonal, It is determined that the signal transmission path is shielded.

14. The signal receiving device according to claim 13, characterized in that the identification module comprises:

a mapping unit for obtaining said phase parameters to form a Poincare plot; and

A judging unit for analyzing the distribution of the phase parameter and identifying that the point formed by the phase parameter is not along the first diagonal or the at least one parallel parallel to the first diagonal When distributed near the line, it is determined that the signal transmission path is in the shield.

15. The signal receiving device according to claim 14, characterized in that:

If the points formed by the phase parameters are not distributed along the first diagonal line whose slope is a positive value of 1 in the Poincare diagram or near the two parallel lines parallel to the first diagonal line and uniformly distributed in the Poincare diagram, and its power parameter value does not fall within an allowable range of the average power of white noise, then the judging unit identifies that the signal transmission path is located in a partial shield.

16. The signal receiving device according to claim 15, characterized in that:

If the points formed by the phase parameters are not distributed along the first diagonal line whose slope is a positive value of 1 in the Poincare diagram or near the two parallel lines parallel to the first diagonal line and concentrated around a specific point, the judging unit identifies that the signal transmission path is located in a deep mask.

17. The signal receiving device according to claim 16, characterized in that:

If the points formed by the phase parameters are not distributed along the first diagonal line whose slope is a positive value of 1 in the Poincare diagram or near the two parallel lines parallel to the first diagonal line And when it is evenly distributed in the Poincare diagram, and its power parameter value falls within the allowable range of the average power of the white noise, then the judging unit identifies that the signal transmission path is in complete shielding.

18. The signal receiving device according to claim 14, 15, 16 or 17, characterized in that:

The judging unit judges the distribution of the phase parameter by calculating the dispersion rate of the points formed by the phase parameter.

19. The signal receiving device according to claim 18, characterized in that:

The judging unit first divides the Poincare diagram into an odd number of equal-area first regions with a plurality of oblique lines parallel to the first diagonal with a slope of positive value 1, and then calculates the The positive actual dispersion rate of the point formed by the phase parameter in the Poincare diagram in the first region, and if the positive actual dispersion rate is not greater than the first critical value, and its power parameter value does not fall into a white noise If the average power is within the allowable range, the judging unit judges that the signal transmission path is partially shielded.

20. The signal receiving device according to claim 19, characterized in that:

If the positive actual dispersion rate is greater than the first critical value, the judging unit re-divides the Poincare diagram into a plurality of diagonal lines parallel to the second diagonal line with a slope of -1 The second area of equal area, and then calculate the negative actual dispersion rate of the point formed by the phase parameter in the second area, and then if the negative actual dispersion rate is not greater than the second critical value, the judgment unit Judging that the signal transmission path is in a normal situation, on the contrary, the judging unit judges that the signal transmission path is in deep shielding.

21. The signal receiving device according to claim 20, characterized in that:

If the positive actual dispersion rate is not greater than the first critical value and the power parameter value falls within the allowable range of the average power of the white noise, the judging unit identifies that the signal transmission path is in a complete shield.

22. The signal receiving device according to claim 13, characterized in that:

When the identification module determines that the signal transmission path is in the shield, it notifies the main system of information about the signal transmission path being in the shield.

23. The signal receiving device according to claim 22, characterized in that:

When the main system receives the information, it notifies the signal receiving device to perform switching with the signal sending device or temporarily suspends the communication.

24. The signal receiving device according to claim 20, characterized in that:

The number of the first area and the second area is equal to the signal sampling frequency of the synchronization program divided by a first default value that is a multiple of 2, then an integer, multiplied by 2, and then added to 1.

25. The signal receiving device according to claim 24, characterized in that:

The first default value is equal to 6.

26. A mask identification device for making a signal receiving device perform a wireless communication mask identification step, the signal receiving device is applied in a wireless communication system, and the wireless communication system also has a signal for mutual transmission of signals with the signal receiving device The sending device, the signal receiving device regularly executes a synchronization program to evaluate the communication quality between itself and the signal sending device, and each synchronization program obtains a signal state evaluation value, and the signal state evaluation value has at least one phase parameter and one power parameter , characterized in that the shielding identification device comprises:

Module A, used to form a Poincare diagram with the points formed by the phase parameters of the signal when the cumulative number of evaluation values of the signal state reaches a default value; and

Module B, for if the point formed by the phase parameter is not along the first diagonal y=x with a slope of positive value 1 in the Poincare diagram or two parallel lines parallel to the first diagonal When y=x-C and y=x-C+2π are distributed around, it is judged that the signal transmission path is in shielding, where x and y represent the abscissa and ordinate of the Poincare diagram respectively, and C is an arbitrary constant.

27. The shielding identification device according to claim 26, characterized in that:

The module B also includes a module for the following operations: if the point formed by the phase parameter is not along the first diagonal with a positive slope of 1 in the Poincare diagram or two lines with the When the parallel line parallel to the first diagonal line is distributed near and evenly distributed in the Poincare diagram, and its power parameter value does not fall within the allowable range of a white noise average power, then it is identified as the signal The transmission path is located in a partial shield.

28. The shielding identification device according to claim 27, characterized in that:

The module B also includes a module for the following operations: if the point formed by the phase parameter is not along the first diagonal with a positive slope of 1 in the Poincare diagram or two lines with the When the parallel lines parallel to the first diagonal line are distributed around and concentrated around a specific point, it is identified that the signal transmission path is located in the deep shield.

29. The shielding identification device according to claim 28, characterized in that:

The module B also includes a module for the following operations: if the point formed by the phase parameter is not along the first diagonal with a positive slope of 1 in the Poincare diagram or two lines with the When the parallel lines parallel to the first diagonal line are distributed near and evenly distributed in the Poincare diagram, and their power parameter values fall within the allowable range of the average power of the white noise, then the judgment unit identifies The signal transmission path is completely shielded.

30. The shielding identification device according to claim 27, 28 or 29, characterized in that:

The module B further includes a module for the following operation: judging the distribution of the phase parameter by calculating the dispersion rate of the points formed by the phase parameter.

31. The shielding identification device according to claim 30, characterized in that said module B further comprises:

Module B1, for dividing the Poincare diagram into an odd number of equal-area first regions with a plurality of diagonal lines parallel to the first diagonal line whose slope is a positive value of 1;

Module B2, for calculating the positive actual dispersion rate of the points formed by the phase parameters in the Poincare diagram in the first region; and

Module B3, for judging that the signal transmission path is in the partial shield if the positive actual dispersion rate is not greater than the first critical value and its power parameter value does not fall within the allowable range of a white noise average power ; If the power parameter value falls within the allowable range of the average power of the white noise, then judging that the signal transmission path is in the complete shielding.

32. The shielding identification device according to claim 31, characterized in that:

The first critical value depends on the first limit dispersion rate and the second limit dispersion rate determined corresponding to the first region, the first limit dispersion rate is that the points formed by the phase parameters are uniformly located in the first The dispersion rate on the diagonal line, the second limit dispersion rate is the dispersion rate when the points formed by the phase parameters are evenly distributed in each of the first regions.

33. The shielding identification device according to claim 32, characterized in that:

The module B also includes:

Module B4, for if the positive actual dispersion rate is greater than the first critical value, re-dividing the Poincare diagram into an odd number with a plurality of oblique lines parallel to the second diagonal line with a slope of -1 The second area of equal area, and then calculate the negative actual dispersion rate of the phase parameter in the second area, and then if the negative actual dispersion rate is not greater than the second critical value, it is judged that the signal transmission path is in a normal state , otherwise, it is determined that the signal transmission path is in deep shielding.

34. The shielding identification device according to claim 33, characterized in that:

The second critical value depends on the first limit dispersion rate and the third limit dispersion rate determined corresponding to the second region, and the first limit dispersion rate is that the phase parameters in the second region are uniformly located at The dispersion rate on the first diagonal line, the third limit dispersion rate is the dispersion rate at which the phase parameters are concentrated at a specific point in the second region.

35. The shielding identification device according to claim 26, characterized in that:

The module B further includes a module for the following operation: when it is determined that the signal transmission path is in shielding, notify the signal sending device and the signal receiving device.

36. The shielding identification device according to claim 33, characterized in that:

The number of the first area and the second area is equal to the signal sampling frequency of the synchronization program divided by a first default value that is a multiple of 2, then rounded up to an integer, multiplied by 2, and then added to 1.

37. The shielding identification device according to claim 36, characterized in that:

The first default value is equal to 6.