CN1780178B - Wireless telecommunication shielding authentication and authenticating system - Google Patents
Wireless telecommunication shielding authentication and authenticating system Download PDFInfo
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- CN1780178B CN1780178B CN2004100950797A CN200410095079A CN1780178B CN 1780178 B CN1780178 B CN 1780178B CN 2004100950797 A CN2004100950797 A CN 2004100950797A CN 200410095079 A CN200410095079 A CN 200410095079A CN 1780178 B CN1780178 B CN 1780178B
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Abstract
A method for discriminating the shield of radio communication features that evaluated signal state value taken by synchronizing program reaches to a default value, its phase parameter is used to generate a Pengiale diagram, and if the dots formed by said phase parameter are not distributed along a diagonal of said Pengiale diagram or its two parallel lines, it is judged that the signal transmission poth is shielded.
Description
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 |
1 | 0 | 1 | 0 |
| Divide Peng Jiale figure along the negative slope |
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 (37)
1. wireless telecommunication shielding discrimination method, be applied in the wireless communication system, this wireless communication system has a sender unit and a signal receiving device, this signal receiving device is regularly carried out a synchronization program to assess the communication quality of the signal transmission path between itself and this sender unit, synchronization program obtains a signal condition assessed value each time, this signal condition assessed value has a phase parameter and a power parameter at least, the synchronization program of generation regularly and accumulated signal state estimation value in time, it is characterized in that this method may further comprise the steps:
(A) when the cumulative number of this signal condition assessed value reaches a default value, form a Peng Jiale figure with the formed point of the phase parameter of this assessed value; And
(B) if the formed point of this phase parameter not along the slope among this Peng Jiale figure near 1 the first diagonal y=x or two parallel lines y=x-Cs parallel and y=x-C+2 π, distributing with this first diagonal, judge that then this signal transmission path is in the shielding, wherein x and y represent abscissa and the ordinate of Peng Jiale figure respectively, and C is an arbitrary constant.
2. discrimination method as claimed in claim 1 is characterized in that:
In described step (B), if the formed point of described phase parameter not along the described slope among described Peng's Galle figure near distribution 1 described first diagonal or two described parallel lines parallel and be uniformly distributed among described Peng's Galle figure with described first diagonal, and its power parameter value does not fall within the permissible range of a white noise average power, differentiates that then described signal transmission path is in the partly shielding effect.
3. discrimination method as claimed in claim 1 is characterized in that:
In described step (B), if the formed point of described phase parameter not along the slope among described Peng's Galle figure near 1 described first diagonal or two described parallel lines parallel, distributing with described first diagonal, and concentrate on a specified point around, differentiate that then described signal transmission path is in the degree of depth shielding.
4. discrimination method as claimed in claim 1 is characterized in that:
In described step (B), if the formed point of described phase parameter not along the slope among described Peng's Galle figure near distribution 1 described first diagonal or two described parallel lines parallel and be uniformly distributed among described Peng's Galle figure with described first diagonal, and its power parameter value falls within the permissible range of a white noise average power, differentiates that then described signal transmission path is in the shielding fully.
5. as claim 1,2,3 or 4 described discrimination methods, it is characterized in that:
Described step (B) is to form the distribution that a little dispersion ratio is judged described phase parameter by calculating described phase parameter.
6. discrimination method as claimed in claim 5 is characterized in that described step (B) may further comprise the steps:
(B1) be the first area that 1 oblique line is divided into described Peng's Galle figure the odd number homalographic with many slopes;
(B2) calculate the formed positive actual discrete rate in this first area of phase parameter described in described Peng's Galle figure; And
(B3) if this positive actual discrete rate is not more than first critical value, and its power parameter value do not fall within the permissible range of a white noise average power, judges that then described signal transmission path is in the partly shielding effect; If this power parameter value falls within the permissible range of a white noise average power, judge that then described signal transmission path is in the shielding fully.
7. discrimination method as claimed in claim 6 is characterized in that:
Described first critical value depends on first limit dispersion ratio and second limit dispersion ratio of corresponding first area decision, this first limit dispersion ratio is that the formed point of described phase parameter all evenly is positioned at the dispersion ratio on this first diagonal, and this second limit dispersion ratio is that described phase parameter forms the dispersion ratio when a little being uniformly distributed in this first area respectively.
8. discrimination method as claimed in claim 7 is characterized in that:
Described step (B) also comprises step (B4), if described positive actual discrete rate is greater than described first critical value, then for-1 oblique line described Peng's Galle figure is reclassified as the second area of odd number homalographic with many slopes, calculate described phase parameter then and form a little negative actual discrete rate in this second area, then if should negative actual discrete rate be not more than second critical value, judge that then described signal transmission path is in the normal condition, on the contrary, judge that then described signal transmission path is in the degree of depth shielding.
9. discrimination method as claimed in claim 8 is characterized in that:
Described second critical value depends on described first limit dispersion ratio and the 3rd limit dispersion ratio of corresponding described second area decision, described first limit dispersion ratio is that the formed point of phase parameter described in the described second area all evenly is positioned at the dispersion ratio on this first diagonal, and the 3rd limit dispersion ratio is the dispersion ratio that concentrates on a specified point at the formed point of phase parameter described in the described second area.
10. discrimination method as claimed in claim 1 is characterized in that:
Described communication system also comprises a system service terminal equipment and the subscriber terminal equipment via this system service terminal equipment wireless receiving and dispatching information, this system service terminal equipment and this subscriber terminal equipment have described signal receiving device and described sender unit respectively, wherein, in described step (B), when judging described signal transmission path and be in the described shielding, notify described signal receiving device and sender unit residing communication system, carry out a changeover program or one and supspend signal procedure.
11. discrimination method as claimed in claim 8 is characterized in that:
It is to round behind first default value of 2 multiple divided by one that the quantity of described first area and second area equals frequency that signal receiving device carries out synchronization program, adds 1 after multiply by 2 again.
12. discrimination method as claimed in claim 11 is characterized in that:
Described first default value equals 6.
13. the signal receiving device with wireless telecommunication shielding identification function is applied in the wireless communication system, this wireless communication system also has one and carries out the sender unit of radio communication with this signal receiving device, and this signal receiving device comprises:
A main system, be used to receive and send messages and regularly carry out a synchronization program to assess the communication quality of signal transmission path between itself and this sender unit, synchronization program obtains a signal condition assessed value each time, and this signal condition assessed value has a phase parameter and a power parameter at least; And
An identification module, be used for when the quantity of this signal condition assessed value reaches a default value, form a Peng Jiale figure with the formed point of the phase parameter of this signal condition assessed value, and identify this phase parameter along the slope among this Peng Jiale figure when near 1 the first diagonal y=x or two parallel lines y=x-Cs parallel and y=x-C+2 π, distributing with this first diagonal, be judged as this signal transmission path and be in the shielding.
14. signal receiving device as claimed in claim 13 is characterized in that described identification module comprises:
A mapping unit is used to obtain described phase parameter and forms a Peng Jiale figure; And
A judging unit, be used to analyze the distribution of described phase parameter and form when a little near described first diagonal or this at least one described parallel lines parallel, not distributing identifying described phase parameter, be judged as described signal transmission path and be in the described shielding with described first diagonal.
15. signal receiving device as claimed in claim 14 is characterized in that:
If it is near distribution and being uniformly distributed among described Peng's Galle figure 1 described first diagonal or two described parallel lines parallel with this first diagonal that described phase parameter forms a little not along the slope among described Peng's Galle figure, and its power parameter value does not fall within the permissible range of a white noise average power, and then described judging unit differentiates that described signal transmission path is arranged in partly shielding.
16. signal receiving device as claimed in claim 15 is characterized in that:
If the formed point of described phase parameter not along the slope among described Peng's Galle figure near 1 described first diagonal or two described parallel lines parallel, distribute with this first diagonal and concentrate on a specified point around the time, then described judging unit differentiates that described signal transmission path is arranged in the degree of depth and shields.
17. signal receiving device as claimed in claim 16 is characterized in that:
If the formed point of described phase parameter not along the slope among described Peng's Galle figure near distribution 1 described first diagonal or two described parallel lines parallel and when being uniformly distributed among described Peng's Galle figure with this first diagonal, and its power parameter value falls within the permissible range of described white noise average power, and then described judging unit differentiates that described signal transmission path is arranged in shielding fully.
18., it is characterized in that as claim 14,15,16 or 17 described signal receiving devices:
Described judging unit forms the distribution that a little dispersion ratio is judged described phase parameter by calculating described phase parameter.
19. signal receiving device as claimed in claim 18 is characterized in that:
Described judging unit is the first area that described Peng's Galle figure is divided into the odd number homalographic on the occasion of the parallel oblique line of 1 described first diagonal with many with described slope at first, calculate phase parameter described in described Peng's Galle figure again and form a little positive actual discrete rate in this first area, then if this positive actual discrete rate is not more than described first critical value, and its power parameter value does not fall within the permissible range of a white noise average power, and then described judgment unit judges is that described signal transmission path is in the partly shielding effect.
20. signal receiving device as claimed in claim 19 is characterized in that:
If described positive actual discrete rate is during greater than described first critical value, then described judging unit is reclassified as described Peng's Galle figure with many oblique lines parallel with second diagonal of slope-1 second area of a plurality of homalographics, calculate the formed negative actual discrete rate of described phase parameter again at this second area, then if when should negative actual discrete rate being not more than described second critical value, the described signal transmission path of then described judgment unit judges is in the normal condition, on the contrary, the described signal transmission path of described judgment unit judges is in the degree of depth shielding.
21. signal receiving device as claimed in claim 20 is characterized in that:
If described positive actual discrete rate is not more than described first critical value and its power parameter value falls within the permissible range of described white noise average power, then described judging unit is differentiated to described signal transmission path is arranged in fully and is shielded.
22. signal receiver as claimed in claim 13 is characterized in that:
When described identification module was judged described signal transmission path and is in the described shielding, the information that relevant described signal transmission path is in the described shielding was notified to described main system.
23. signal receiving device as claimed in claim 22 is characterized in that:
When described main system is received described information, notify described signal receiving device and described sender unit execution switching or supspend described communication.
24. signal receiving device as claimed in claim 20 is characterized in that:
The signal sampling frequency that the quantity of described first area and second area equals described synchronization program is round numbers behind first default value of 2 multiple divided by one, adds 1 after multiply by 2 again.
25. signal receiving device as claimed in claim 24 is characterized in that:
Described first default value equals 6.
26. one kind is used to make signal receiving device to carry out the shielding identification device that wireless telecommunication shielding is differentiated step, this signal receiving device is applied in the wireless communication system, this wireless communication system also has one and sends the sender unit of signal mutually with this signal receiving device, this signal receiving device is regularly carried out a synchronization program to assess the communication quality between itself and this sender unit, respectively this synchronization program obtains a signal condition assessed value, this signal condition assessed value has a phase parameter and a power parameter at least, it is characterized in that this shielding identification device comprises:
Modules A is used for when the cumulative number of this signal condition assessed value reaches a default value, forms a Peng Jiale figure with the formed point of the phase parameter of this signal; And
Module B, be used for if the formed point of this phase parameter not along the slope of this Peng Jiale figure when near 1 the first diagonal y=x or two parallel lines y=x-Cs parallel and y=x-C+2 π, distributing with this first diagonal, being judged as this signal transmission path is in the shielding, wherein x and y represent abscissa and the ordinate of Peng Jiale figure respectively, and C is an arbitrary constant.
27. shielding identification device as claimed in claim 26 is characterized in that:
Described module B also comprises the module that is used for following operation: if the formed point of described phase parameter not along the slope of described Peng's Galle figure near distribution 1 described first diagonal or two described parallel lines parallel and when being uniformly distributed among described Peng's Galle figure with this first diagonal, and its power parameter value does not fall within the permissible range of a white noise average power, then differentiates to be arranged in partly shielding effect for described signal transmission path.
28. shielding identification device as claimed in claim 27 is characterized in that:
Described module B also comprises the module that is used for following operation: if the formed point of described phase parameter not along the slope of described Peng's Galle figure near 1 described first diagonal or two described parallel lines parallel, distribute with this first diagonal and concentrate on a specified point around the time, then differentiate to described signal transmission path is arranged in the degree of depth to shield.
29. shielding identification device as claimed in claim 28 is characterized in that:
Described module B also comprises the module that is used for following operation: if the formed point of described phase parameter not along the slope of described Peng's Galle figure near distribution 1 described first diagonal or two described parallel lines parallel and when being uniformly distributed among described Peng's Galle figure with this first diagonal, and its power parameter value falls within the permissible range of described white noise average power, and then described judging unit is differentiated to described signal transmission path is arranged in fully and shielded.
30., it is characterized in that as claim 27,28 or 29 described shielding identification devices:
Described module B also comprises the module that is used for following operation: form the distribution that a little dispersion ratio is judged described phase parameter by calculating described phase parameter.
31. shielding identification device as claimed in claim 30 is characterized in that described module B also comprises:
Module B1, being used for many is the first area that described Peng's Galle figure is divided into the odd number homalographic on the occasion of the parallel oblique line of 1 described first diagonal with described slope;
Module B2 is used to calculate the formed positive actual discrete rate in this first area of phase parameter described in described Peng's Galle figure; And
Module B3 is used for judging that then described signal transmission path is in the described partly shielding effect if this positive actual discrete rate is not more than described first critical value and its power parameter value does not fall within the permissible range of a white noise average power; If described power parameter value falls within the permissible range of this white noise average power, judge that then described signal transmission path is in the described shielding fully.
32. shielding identification device as claimed in claim 31 is characterized in that:
Described first critical value depends on first limit dispersion ratio and second limit dispersion ratio of corresponding described first area decision, this first limit dispersion ratio is that the formed point of described phase parameter all evenly is positioned at the dispersion ratio on described first diagonal, and this second limit dispersion ratio is the dispersion ratio of the formed point of described phase parameter when being uniformly distributed in this first area respectively.
33. shielding identification device as claimed in claim 32 is characterized in that:
Described module B also comprises:
Module B4, be used for as if described positive actual discrete rate greater than described first critical value, then described Peng's Galle figure is reclassified as the second area of odd number homalographic with many oblique lines parallel with second diagonal of slope-1, calculate the negative actual discrete rate of described phase parameter again at this second area, then if when should negative actual discrete rate being not more than described second critical value, judge that described signal transmission path is in the normal condition, on the contrary, then being judged as described signal transmission path is in the degree of depth shielding.
34. shielding identification device as claimed in claim 33 is characterized in that:
Described second critical value depends on described first limit dispersion ratio and the 3rd limit dispersion ratio of corresponding described second area decision, this first limit dispersion ratio is that phase parameter described in the described second area all evenly is positioned at the dispersion ratio on described first diagonal, and the 3rd limit dispersion ratio is the dispersion ratio that concentrates on a specified point at phase parameter described in the described second area.
35. shielding identification device as claimed in claim 26 is characterized in that:
Described module B also comprises the module that is used for following operation: being judged as described signal transmission path when being in shielding, notify described sender unit and described signal receiving device.
36. shielding identification device as claimed in claim 33 is characterized in that:
The signal sampling frequency that the quantity of described first area and second area equals described synchronization program divided by first default value of one 2 multiple after round numbers, add 1 after multiply by 2 again.
37. shielding identification device as claimed in claim 36 is characterized in that:
Described first default value equals 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2004100950797A CN1780178B (en) | 2004-11-23 | 2004-11-23 | Wireless telecommunication shielding authentication and authenticating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2004100950797A CN1780178B (en) | 2004-11-23 | 2004-11-23 | Wireless telecommunication shielding authentication and authenticating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1780178A CN1780178A (en) | 2006-05-31 |
| CN1780178B true CN1780178B (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004100950797A Expired - Fee Related CN1780178B (en) | 2004-11-23 | 2004-11-23 | Wireless telecommunication shielding authentication and authenticating system |
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| Country | Link |
|---|---|
| CN (1) | CN1780178B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5633786A (en) * | 1995-08-21 | 1997-05-27 | Motorola | Shield assembly and method of shielding suitable for use in a communication device |
| WO2001082671A1 (en) * | 2000-04-21 | 2001-11-01 | Wavecom | Method for shielding at least the upper part of a radiocommunication module, and corresponding radiocommunication module |
-
2004
- 2004-11-23 CN CN2004100950797A patent/CN1780178B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5633786A (en) * | 1995-08-21 | 1997-05-27 | Motorola | Shield assembly and method of shielding suitable for use in a communication device |
| WO2001082671A1 (en) * | 2000-04-21 | 2001-11-01 | Wavecom | Method for shielding at least the upper part of a radiocommunication module, and corresponding radiocommunication module |
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| Publication number | Publication date |
|---|---|
| CN1780178A (en) | 2006-05-31 |
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