CN103686927A - Method and device for judging whether to terminate communication between mobile terminal and base station - Google Patents

Abstract

The invention provides a method and a device for judging whether to terminate communication between a mobile terminal and a base station. The method comprises the following steps: acquiring a first time span which starts from the time when a signal processing unit in the base station sends a first signal to the mobile terminal and ends at the time when the signal processing unit in the base station receives a feedback signal fed back by the mobile terminal for the first signal, a second time span required for signal transmission between the signal processing unit and a signal transmission terminal and a third time span required to be delayed when the mobile terminal sends a signal; determining a fourth time span required for signal transmission between the signal transmission terminal and the mobile terminal according to the first time span, the second time span and the third time span; terminating communication between the mobile terminal and the base station when the mobile terminal is positioned in a service prohibition area is judged according to the fourth time span. According to the invention, whether the distance between the mobile terminal and the base station exceeds the allowed service provision range can be judged more accurately.

Description

For judging whether to stop the method and apparatus of communicating by letter between mobile terminal and base station

Technical field

The present invention relates to communication technical field, relate in particular to a kind of in cdma system for judging whether to stop the method and apparatus of communicating by letter between mobile terminal and base station.

Background technology

In some cases, need to accurately control the range of signal of accessible base station.For example, on some state boundaries, need to prevent the base station of the mobile phone access home server of other countries, but distance between may two countries is very approaching, as two countries divide state boundary with a river course, but only 100 meters etc. of river widths.

Other countries access national base station in order to prevent user, and other countries can broadcast the last one narrow band frequency and stop up national communication system.This obstruction also can cause the basic call access on national border to receive impact.

In prior art, there is the method for the range of signal of the accessible base station of following control:

1) make the antenna of base station downward-sloping to reach the object of restricting signal access scope, but because the distance between two countries is very approaching, and this kind of method accuracy and control precision are lower, therefore cannot reach the object of relatively accurately controlling the range of signal of accessible base station.

2) by replacement base station, carry out modified R F (radio frequency) design, make when RF transmission approaches the border of other countries, by a kind of mode, transferred in community, thereby transmission can not enter other countries, or the tru(e)ing face is to the size of the sector of other countries and through-put power.But this kind of method exists the problem that control precision is lower equally, and replacement RF can cause regional issue and extra cost as MSC (mobile switching centre) layer.

3) introduce new hardware and software and remove the arrowband interference that other countries bring.But this method is very expensive and need extra hardware and space.The more important thing is that this method can not solve the basic reason (entering the RF transmission of other countries) that causes this problem.May cause like this other countries in the future to produce a kind of dissimilar interference (for example broad-band interference).In this case, can make the method for narrow-band interference excision lose efficacy.

Summary of the invention

The object of this invention is to provide a kind of in cdma system for judging whether to stop the method and apparatus of communicating by letter between mobile terminal and base station.

According to an aspect of the present invention, provide a kind of in cdma system for judging whether to stop the method for communicating by letter between mobile terminal and base station, wherein, the method comprises the following steps:

A obtain signal processing unit in described base station from send first signal to described mobile terminal until receive this mobile terminal to the very first time length between the feedback signal of described first signal, at the second required time span of signal transmission between described signal processing unit and the signalling terminals of described base station and described mobile terminal, need the 3rd time span of time delay during in transmitted signal;

B, according to described very first time length, described the second time span and described the 3rd time span, determines the 4th required time span of signal transmission between described signalling terminals and described mobile terminal;

Wherein, the method is further comprising the steps of:

I is when judging that according to described the 4th time span described mobile terminal is arranged in while forbidding providing the region of service, stops communicating by letter between described mobile terminal and described base station.

According to another aspect of the present invention, also provide a kind of in cdma system for judging whether to stop the device of communicating by letter between mobile terminal and base station, wherein, this device comprises:

Acquisition device, for the signal processing unit that obtains described base station from send first signal to described mobile terminal until receive this mobile terminal to the very first time length between the feedback signal of described first signal, at the second required time span of signal transmission between described signal processing unit and the signalling terminals of described base station and described mobile terminal, need the 3rd time span of time delay during in transmitted signal;

The first determining device, for according to described very first time length, described the second time span and described the 3rd time span, determines the 4th required time span of signal transmission between described signalling terminals and described mobile terminal;

Stop device, for when judging that according to described the 4th time span described mobile terminal is positioned at while forbidding providing the region of service, stops communicating by letter between described mobile terminal and described base station.

Compared with prior art, the present invention has the following advantages: 1) by accurate Calculation, between mobile terminal and base station, carry out the required time span of signal transmission, can comparatively accurately judge whether the distance between mobile terminal and base station surpasses the scope that allows to provide service, for example, the present invention can be accurate to tens meters to the Distance Judgment between mobile terminal and base station, as 30m etc., 2) because wireless transmission is subject to several factors (multipath, landform, reception delay etc.) impact, in the situation that some are few, the measurement of the 4th time span RTD may produce deviation, in few situation, if but mobile terminal has passed through access attempts inspection has been physically located in while forbidding providing the region of service, will proceed call setup, by when mobile terminal enters Traffic Channel, continue to monitor at least one times the 4th time span RTD measured value in Traffic Channel, and be positioned at while forbidding providing the region of service when judgement mobile terminal, stop communicating by letter between mobile terminal and base station, can further reduce to forbidding providing the region of service that the possible of communication service is provided, 3) at mobile terminal, enter after service signal, execution step when business is set up calling without response, can avoid affecting user as far as possible and experience, 4) by judging that the 4th time span belongs to predetermined abnormal ranges, can filter the exceptional value of the 4th time span, and attempt to obtain normal the 4th time span by re-executing step, thereby reduce the possibility of judging by accident.

Accompanying drawing explanation

By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:

Fig. 1 be a preferred embodiment of the invention in cdma system for judging whether to stop the method flow diagram of communicating by letter between mobile terminal and base station;

Fig. 2 be another preferred embodiment of the present invention in cdma system for judging whether to stop the method flow diagram of communicating by letter between mobile terminal and base station;

Fig. 3 be a preferred embodiment of the invention in cdma system for judging whether to stop the structural representation of the device of communicating by letter between mobile terminal and base station;

Fig. 4 be another preferred embodiment of the present invention in cdma system for judging whether to stop the structural representation of the device of communicating by letter between mobile terminal and base station.

In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

Fig. 1 be a preferred embodiment of the invention in cdma system for judging whether to stop the method flow diagram of communicating by letter between mobile terminal and base station.The present embodiment comprises step S1, step S2 and step S3.Wherein, described mobile terminal includes but not limited to any mobile terminal that can access base station, for example, and smart mobile phone, panel computer etc.Described base station comprises signalling terminals and signal processing unit; Wherein, described signalling terminals includes but not limited to antenna etc., described signal processing unit includes but not limited to the device of processing for signal in described base station, this signal processing unit can Further Division be a plurality of devices, for example, Channel Elements (channel element), processing unit etc.

It should be noted that, described mobile terminal and base station are only for giving an example, and other mobile terminals existing or that may occur from now on, as applicable to the present invention, also should be included in protection range of the present invention, and are contained in this with way of reference.

The device AP that carries out the inventive method is contained in described base station; Preferably, device AP is contained in signal processing unit, or device AP can process and singly communicate with signal, and the time of the required cost of between signal transmission can ignore.

The process of device AP execution the inventive method will be introduced below.

In step S1, device AP obtain the signal processing unit in base station under it from send first signal to mobile terminal until receive this mobile terminal to the very first time length between the feedback signal of described first signal, at the second required time span of signal transmission between described signal processing unit and the signalling terminals of described base station and described mobile terminal, need the 3rd time span of time delay during in transmitted signal.

Wherein, signal processing unit sends first signal to mobile terminal, and the feedback signal of mobile terminal receive to first signal, and device AP obtains signal processing unit and sends first signal until obtain the very first time length between feedback signal.Preferably, very first time length comprises that first signal receives the time span between the feedback signal of first signal to Channel Elements from the Channel Elements of signal processing unit sends.

It should be noted that, between base station and mobile terminal, may have many communication paths, for example, between mobile terminal and base station, carry out direct communication, and mobile terminal communicates etc. to base station under device AP by other base stations.Therefore first signal is after signal processing unit sends, signal processing unit may repeatedly receive the feedback signal of first signal.Therefore, very first time length may comprise a plurality of time spans.

Wherein, the distance between signal processing unit and the signalling terminals of base station is normally fixing, therefore required the second time span of between signal transmission is also normally fixing.Device AP can directly obtain the second time span of determining in advance; Or device AP can, according to the distance between definite in advance signal processing unit and the signalling terminals of base station, determine the second time span; Or device AP transmits the second required time span and measures between signal processing unit and the signalling terminals of base station to signal, and the second time span of gained measured in record.

Wherein, in cdma system, for fear of occurring that channel blocks up, need the time of the signal arrival base station that in diffusion system, mobile terminal sends, therefore, mobile terminal can be given according to base station broadcast its parameter time delay transmitted signal.

Device AP can be according to base station broadcast the parameter to mobile terminal, determine mobile terminal required time delay when transmitted signal.

Preferably, device AP, according to following formula, determines that mobile terminal needs the 3rd time span of time delay when transmitted signal:

$\mathrm{PN}\_\mathrm{Rand}=\mathrm{floor}(N*\left((40503*(L\&CirclePlus;H\&CirclePlus;\mathrm{DECORR}))\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="HDA00002097940200031.png"\; state="\{\{state\}\}">mod</figure-callout>}{2}^{16}\right)/2^{16});$

Wherein, PN_Rand represents described the 3rd time span, and N represents Hash scope and N=2 ^pdescribed P represents that base station broadcast is to the system parameters of described mobile terminal, L represents 16 bits of low order of the ESN of described mobile terminal, H represents 16 bits of high-order of the ESN of described mobile terminal, DECORR=14*ESN[0...11], 40503 represent Hash multiplier, and floor represents bracket function, and mod represents mod.

Those skilled in the art will be understood that device AP determines that the mode of the 3rd time span is not limited to above-mentioned formula, and any adjustment of above-mentioned formula being done according to the actual conditions of cdma system and demand, all should be contained in technical scope of the present invention.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any obtain signal processing unit in base station from send first signal to mobile terminal until receive this mobile terminal to the very first time length between the feedback signal of described first signal, at the second required time span of signal transmission between described signal processing unit and the signalling terminals of described base station and described mobile terminal, need the implementation of the 3rd time span of time delay during in transmitted signal, all should be within the scope of the present invention.

Then,, in step S2, device AP, according to described very first time length, described the second time span and described the 3rd time span, determines the 4th required time span of signal transmission between described signalling terminals and described mobile terminal.

Particularly, device AP can adopt various ways to determine the 4th time span.

As a kind of preferred version, very first time length comprises signal processing unit from send first signal to mobile terminal until receive this mobile terminal directly to the direct Lifetime length between the feedback signal of described base station transmission, device AP deducts this direct Lifetime length the second time span of the 3rd time span and twice, obtains described the 4th time span.

For example, device AP comprises signal processing unit from send first signal to mobile terminal until receive this mobile terminal directly to the shortest time length between the feedback signal of described base station transmission by the very first time length obtaining in step S1, as direct Lifetime length EPO, and device AP obtains the second time span TRX_delay and the 3rd time span PN_Rand in step S1, install AP according to following formula, determine the 4th time span RTD:

RTD＝(EPO-2*TRX_delay-PN_Rand)/2。

In many communication paths that may exist between mobile terminal and base station, the path being directly communicated with between mobile terminal and base station, be that signal is directly sent to mobile terminal and mobile terminal directly to the path of base station transmitted signal from base station, the signal transmission time of required cost is minimum.Therefore, when first signal is from signal processing unit sends, the feedback information that signal processing unit receives the earliest, can be considered to the directly feedback information of feedback of mobile terminal, send first signal until the time span receiving between the feedback information of direct feedback is direct Lifetime length EPO, by the signal forward delay interval of this direct Lifetime length deduction mobile terminal, i.e. the 3rd time span PF_Rand, and, signal carrys out the required time span of transmission back between signal processing unit and the signalling terminals of base station, be 2*TRX_delay, can between the signalling terminals of mobile terminal and base station, carry out the required time span of transmission back by picked up signal, be 2*RTD, its half time span, be the time span RTD of the one-way transmission required cost of signal between the signalling terminals of mobile terminal and base station.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any according to described very first time length, described the second time span and described the 3rd time span, determine the implementation of the 4th time span that between described signalling terminals and described mobile terminal signal transmission is required, all should be within the scope of the present invention.

In step S3, when judging that according to the 4th time span described mobile terminal is arranged in while forbidding providing the region of service, device AP stops communicating by letter between described mobile terminal and described base station.

Wherein, it is pre-definite that described base station provides the region of service, and for example, the Nei Wei base station, national boundaries of definite other countries provides the region of service etc. in advance.

Particularly, when judging that according to the 4th time span described mobile terminal is arranged in while forbidding providing the region of service, device AP stops described mobile terminal and includes but not limited to the mode of communicating by letter between described base station:

1), when surpassing predetermined threshold according to the distance between the 4th time span judgement mobile terminal and base station, device AP stops communicating by letter between described mobile terminal and described base station.Also the region that, the distance of device AP between mobile terminal and base station surpasses predetermined threshold is as the region of forbidding providing service.

Wherein, when device AP surpasses predetermined threshold according to the distance between the 4th time span judgement mobile terminal and base station, stop described mobile terminal and include but not limited to the mode of communicating by letter between described base station:

A), when the 4th time span surpasses the scheduled time during length threshold, device AP stops communicating by letter between mobile terminal and base station.Also, device AP determines that over the scheduled time length threshold distance between mobile terminal and base station surpasses predetermined threshold by the 4th time span.

For example, it is unit that time span be take the time span of 1/8 chip, and be expressed as chip/8, the 4th time span that device AP obtains is 20.5 (chip/8), scheduled time length threshold is 19 (chip/8), install AP according to 20.5 > 19, judgement moves distance between mobile terminal and base station and surpasses predetermined threshold, and stops communicating by letter between mobile terminal and base station.

Because the 4th time span can reflect the distance between base station and mobile terminal, therefore, by surpassing the scheduled time when the 4th time span during length threshold, can think that the distance between base station and mobile terminal surpasses predetermined distance threshold.

B) device AP is converted to distance by the 4th time span, and when the distance changed of judgement surpasses predetermined threshold, communicating by letter between termination mobile terminal and base station.

For example, it is unit that time span be take the time span of 1/8 chip, and within 1 second, comprise the individual chip of 1.228Mcps (megacycles per second), the time span of a chip is about 0.8138us, the time span of a chip is multiplied by the aerial propagation velocity of signal and is about 0.299311km/us, the propagation distance of picked up signal when the time span of a chip is about 0.244km, and in the time span of 1/8 chip, the aerial propagation distance of signal is about 30.5m.

Predetermined threshold is 500m, the 4th time span that device AP obtains in step S2 is 20.5 (chip/8), install AP according to 20.5*30.5=625.25 > 500, judgement mobile terminal is arranged in the region of forbidding providing service, and stops communicating by letter between mobile terminal and base station.

2) at device AP, also obtain in the situation that carry out signal between other base stations and mobile terminal and transmit the 7th required time span, device AP is according to the 4th time span, the 7th time span and comprise described base station, described other base stations and described in forbid providing the cartographic information of positional information in the region of service, judge described mobile terminal forbids providing the region of service described in whether being arranged in, and when judging that according to described the 4th time span described mobile terminal is forbidden providing the region of service described in being arranged in, stop communicating by letter between described mobile terminal and described base station.This implementation will be described in detail with reference to the embodiment shown in FIG. 2, not repeat them here.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any when judging that according to the 4th time span described mobile terminal is arranged in while forbidding providing the region of service, stop the implementation of communicating by letter between described mobile terminal and described base station, all should be within the scope of the present invention.

Need to further illustrate, when judging that according to the 4th time span described mobile terminal is not arranged in while forbidding providing the region of service, the operation of not executive termination of device AP communication, mobile terminal is communicated by letter with base station continuation.

In the present invention, by accurate Calculation, between mobile terminal and base station, carry out the required time span of signal transmission, can comparatively accurately judge whether the distance between mobile terminal and base station surpasses the scope that allows to provide service.For example, the present invention can be accurate to tens meters to the Distance Judgment between mobile terminal and base station, as 30m etc.

Step S1 to S3 can be performed in a plurality of stages when mobile terminal and base station communicate.For example, be performed transferring when call attempt is carried out in terminal and described base station; Again for example, after call attempt success, enter and when Traffic Channel communicates, be performed etc. transferring terminal and base station.

As one of preferred version of the present embodiment, step S1 to S3 is performed when call attempt is carried out in described handover terminal and described base station, and, when transferring terminal and base station, enter Traffic Channel while communicating, install AP and carry out again at least one times step S1 to step S3.

Wherein, when transferring terminal and base station, enter Traffic Channel while communicating, install AP can be in pre-determined number repeating step S1 to S3.For example, pre-determined number is 2 times, installs AP and can repeat execution step S1 to S3 2 times.Preferably, when transferring terminal and base station, enter Traffic Channel while communicating, installing AP can be in pre-determined number, with predetermined time interval repeating step S1 to S3.

For example, mobile terminal sends initial or paging corresponding information on access channel to base station, when base station receives the initial or paging corresponding information of mobile terminal transmission, and device AP execution step S1, step S2 and step S3; When judging that in step S3 mobile terminal is not positioned at the region of forbidding providing service, and mobile terminal is by the access attempts with base station, while entering Traffic Channel, device AP performs step S1, step S2 and step S3 again, if epicycle still judges that in step S3 mobile terminal is not positioned at the region of forbidding providing service, follow, according to pre-determined number, be 2 times, predetermined time interval is 100ms, and device AP again performs step S1, step S2 and step S3 after 100ms; Then,, due to device AP executed 2 step S1, step S2 and step S3 when mobile terminal enters Traffic Channel communication, device AP no longer performs step S1, step S2 and step S3.

In upper example, when judging that in step S3 mobile terminal is positioned at while forbidding providing the region of service, device AP sends and releases order to mobile terminal, to avoid mobile terminal again automatically to make a call.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, anyly when transferring terminal and base station, enter Traffic Channel while communicating, carrying out step S1 at least one times, all should be within the scope of the present invention to the implementation of step S3 again.

Because wireless transmission is subject to the impact of several factors (multipath, landform, reception delay etc.), in the situation that some are few, the measurement of the 4th time span RTD may produce deviation, in few situation, if but mobile terminal has passed through access attempts inspection has been physically located in while forbidding providing the region of service, will proceed call setup.The present embodiment, when mobile terminal enters Traffic Channel, continues to monitor at least one times the 4th time span RTD measured value in Traffic Channel, and is positioned at while forbidding providing the region of service when judgement mobile terminal, between termination mobile terminal and base station, communicates by letter.Preferably, mobile terminal enters after service signal, and step S1 to S3 sets up to call out when nothing responds in business and is performed, and can avoid affecting user as far as possible and experience.

As one of preferred version of the present embodiment, when described the 4th time span belongs to predetermined abnormal ranges, device AP re-executes step S1 to step S3.

Wherein, described predetermined abnormal ranges can comprise the scope that any the 4th time span should not belong to.Preferably, predetermined abnormal ranges includes but not limited to:

1) the 4th time span is less than zero;

2) the 4th time span differs larger with historical the 4th time span scope recording, and for example, is greater than 1 order of magnitude of maximum of the 4th time span scope that history records above etc.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, it is any when described the 4th time span belongs to predetermined abnormal ranges, re-execute step S1 to the implementation of step S3, all should be within the scope of the present invention.

In few situation, the 4th time span may be abnormal, by judging that the 4th time span belongs to predetermined abnormal ranges, can filter the exceptional value of the 4th time span, and attempt to obtain normal the 4th time span by re-executing step S1 to S3, thereby reduce the possibility of erroneous judgement.

Fig. 2 be another preferred embodiment of the present invention in cdma system for judging whether to stop the method flow diagram of communicating by letter between mobile terminal and base station.The method of the present embodiment comprises step S1, step S2, step S4 and step S3; Wherein, step S3 further comprises step S31 and step S32.

Step S1 and S2 are described in detail with reference to the embodiment shown in FIG. 1, do not repeat them here.It should be noted that, in the present embodiment, the very first time length obtaining in step S1 also comprises signal processing unit from send first signal to mobile terminal until receive the indirect communication time span between the feedback signal of the first signal that Xiang Gai base station, other base stations forwards.Also, device AP determined after direct Lifetime length according to the time that receives the earliest feedback signal, continued, mobile terminal time to the feedback signal of first signal that other base stations forward according to receiving, and determined indirect communication time span.

In step S4, device AP deducts under it the 6th required time span of signal transmission between signal transmission between base station and other base stations required the 5th time span, the 3rd time span, the second time span of twice and the described signal processing unit in described other base stations of twice and the signalling terminals of described other base stations, acquisition the 7th time span by indirect communication time span.

Wherein, because the distance between base station and base station is fixed, therefore, the 5th time span is also normally fixed.Device AP can directly obtain the 5th time span of determining in advance; Or device AP can be according to the distance between definite in advance base station, the 5th time span converts; Or, device AP can be to these other base station transmitted signals, thereby measure the distance between its affiliated base station and this other base stations, for example, by to these other base station transmitted signals until receive the time span between the feedback signal of these other base stations, deduct the second time span and the 6th time span, obtain the 5th time span etc.

Wherein, between base station and base station, the distance between signal processing unit and the signalling terminals of base station may be close.Therefore, device AP can be directly using the second time span as the 6th time span; Or device AP obtains by manually offering in advance its 6th time span; Or device AP obtains the 6th time span that these other base stations offer it.

By execution step S4, device AP can comparatively accurately determine that between mobile terminal and other base stations of forwarding feedback signal, carrying out signal transmits the 7th required time span.

It should be noted that, between step S2 and step S4, there is no sequencing.

In step S31, device AP is according to the 4th time span, the 7th time span and other base stations that comprise base station under device AP, described forwarding feedback signal and the cartographic information of positional information of forbidding providing the region of service, judges described mobile terminal forbids providing the region of service described in whether being arranged in.

Particularly, device AP can determine the distance between base station and mobile terminal according to the 4th time span, and determine the distance between these other base stations and mobile terminal according to the 7th time span, in the situation that the position that cartographic information comprises base station under device AP, forwards other base stations of feedback signal and forbid providing the region of service, device AP can be on cartographic information the particular location of localisation of mobile terminals, thereby judge whether mobile terminal is arranged in the region of forbidding providing service.

It should be noted that, under device AP, base station may receive a plurality of other base stations forwardings, the feedback signal of mobile terminal to first signal, installing AP can calculate a plurality of signals that carry out between mobile terminal and other base stations and transmit the 7th required time span, for example, under device AP, base station is base station BS 1, it receives the feedback information of other base station BSs 2 and BS3 forwarding, installing AP calculates respectively and transmits the 7th required time span and between mobile terminal and other base station BSs 3, carry out signal and transmit the 7th required time span carrying out signal between mobile terminal and other base station BSs 2.

In step S32, when judgement mobile terminal is forbidden providing the region of service described in being arranged in, device AP stops communicating by letter between described mobile terminal and described base station.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any according to the 4th time span, the 7th time span and comprise base station under device AP, other base stations of described forwarding feedback signal and forbidding provide the cartographic information of positional information in the region of service, judge described mobile terminal forbids providing the region of service described in whether being arranged in, and when forbidding providing the region of service described in judgement mobile terminal is arranged in, stop the implementation of communicating by letter between described mobile terminal and described base station, all should be within the scope of the present invention.

The present embodiment is by the position of localisation of mobile terminals more accurately, can block better the communication between the mobile terminal in region of forbidding providing service.

Fig. 3 be a preferred embodiment of the invention in cdma system for judging whether to stop the structural representation of the device AP communicating by letter between mobile terminal and base station.The device AP of the present embodiment comprises acquisition device 1, the first determining device 2 and stop device 3.

Acquisition device 1 obtain the signal processing unit in base station under it from send first signal to mobile terminal until receive this mobile terminal to the very first time length between the feedback signal of described first signal, at the second required time span of signal transmission between described signal processing unit and the signalling terminals of described base station and described mobile terminal, need the 3rd time span of time delay during in transmitted signal.

Wherein, signal processing unit sends first signal to mobile terminal, and the feedback signal of mobile terminal receive to first signal, and acquisition device 1 obtains signal processing unit and sends first signal until obtain the very first time length between feedback signal.Preferably, very first time length comprises that first signal receives the time span between the feedback signal of first signal to Channel Elements from the Channel Elements of signal processing unit sends.

It should be noted that, between base station and mobile terminal, may have many communication paths, for example, between mobile terminal and base station, carry out direct communication, and mobile terminal communicates etc. to base station under device AP by other base stations.Therefore first signal is after signal processing unit sends, signal processing unit may repeatedly receive the feedback signal of first signal.Therefore, very first time length may comprise a plurality of time spans.

Wherein, the distance between signal processing unit and the signalling terminals of base station is normally fixing, therefore required the second time span of between signal transmission is also normally fixing.Acquisition device 1 can directly obtain the second time span of determining in advance; Or acquisition device 1 can, according to the distance between definite in advance signal processing unit and the signalling terminals of base station, be determined the second time span; Or 1 pair of signal of acquisition device transmits the second required time span between signal processing unit and the signalling terminals of base station to be measured, and the second time span of gained measured in record.

Wherein, in cdma system, for fear of occurring that channel blocks up, need the time of the signal arrival base station that in diffusion system, mobile terminal sends, therefore, mobile terminal can be given according to base station broadcast its parameter time delay transmitted signal.

Acquisition device 1 can be according to base station broadcast the parameter to mobile terminal, determine mobile terminal required time delay when transmitted signal.

Preferably, acquisition device 1, according to following formula, determines that mobile terminal needs the 3rd time span of time delay when transmitted signal:

$\mathrm{PN}\_\mathrm{Rand}=\mathrm{floor}(N*\left((40503*(L\&CirclePlus;H\&CirclePlus;\mathrm{DECORR}))\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="HDA00002097940200031.png"\; state="\{\{state\}\}">mod</figure-callout>}{2}^{16}\right)/2^{16});$

Wherein, PN_Rand represents described the 3rd time span, and N represents Hash scope and N=2 ^pdescribed P represents that base station broadcast is to the system parameters of described mobile terminal, L represents 16 bits of low order of the ESN of described mobile terminal, H represents 16 bits of high-order of the ESN of described mobile terminal, DECORR=14*ESN[0...11], 40503 represent Hash multiplier, and floor represents bracket function, and mod represents mod.

Those skilled in the art will be understood that acquisition device 1 determines that the mode of the 3rd time span is not limited to above-mentioned formula, and any adjustment of above-mentioned formula being done according to the actual conditions of cdma system and demand, all should be contained in technical scope of the present invention.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any obtain signal processing unit in base station from send first signal to mobile terminal until receive this mobile terminal to the very first time length between the feedback signal of described first signal, at the second required time span of signal transmission between described signal processing unit and the signalling terminals of described base station and described mobile terminal, need the implementation of the 3rd time span of time delay during in transmitted signal, all should be within the scope of the present invention.

Then, the first determining device 2, according to described very first time length, described the second time span and described the 3rd time span, is determined the 4th required time span of signal transmission between described signalling terminals and described mobile terminal.

Particularly, the first determining device 2 can adopt various ways to determine the 4th time span.

As a kind of preferred version, very first time length comprises signal processing unit from send first signal to mobile terminal until receive the direct Lifetime length between the feedback signal that this mobile terminal directly sends to described base station, and the first determining device 2 comprises sub-determining device (not shown).Sub-determining device deducts this direct Lifetime length the second time span of the 3rd time span and twice, obtains described the 4th time span.

For example, the very first time length that acquisition device 1 obtains comprises signal processing unit from send first signal to mobile terminal until receive this mobile terminal directly to the shortest time length between the feedback signal of described base station transmission, as direct Lifetime length EPO, and acquisition device 1 obtains the second time span TRX_delay and the 3rd time span PN_Rand, sub-determining device, according to following formula, is determined the 4th time span RTD:

RTD＝(EPO-2*TRX_delay-PN_Rand)/2。

In many communication paths that may exist between mobile terminal and base station, the path being directly communicated with between mobile terminal and base station, be that signal is directly sent to mobile terminal and mobile terminal directly to the path of base station transmitted signal from base station, the signal transmission time of required cost is minimum.Therefore, when first signal is from signal processing unit sends, the feedback information that signal processing unit receives the earliest, can be considered to the directly feedback information of feedback of mobile terminal, send first signal until the time span receiving between the feedback information of direct feedback is direct Lifetime length EPO, by the signal forward delay interval of this direct Lifetime length deduction mobile terminal, i.e. the 3rd time span PF_Rand, and, signal carrys out the required time span of transmission back between signal processing unit and the signalling terminals of base station, be 2*TRX_delay, can between the signalling terminals of mobile terminal and base station, carry out the required time span of transmission back by picked up signal, be 2*RTD, its half time span, be the time span RTD of the one-way transmission required cost of signal between the signalling terminals of mobile terminal and base station.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any according to described very first time length, described the second time span and described the 3rd time span, determine the implementation of the 4th time span that between described signalling terminals and described mobile terminal signal transmission is required, all should be within the scope of the present invention.

When judging that according to the 4th time span described mobile terminal is arranged in while forbidding providing the region of service, stop device 3 stops communicating by letter between described mobile terminal and described base station.

Wherein, it is pre-definite that described base station provides the region of service, and for example, the Nei Wei base station, national boundaries of definite other countries provides the region of service etc. in advance.

Particularly, when judging that according to the 4th time span described mobile terminal is arranged in while forbidding providing the region of service, stop device 3 stops described mobile terminal and includes but not limited to the mode of communicating by letter between described base station:

1) stop device 3 comprises the first sub-stop device (not shown), and when surpassing predetermined threshold according to the distance between the 4th time span judgement mobile terminal and base station, the first sub-stop device stops communicating by letter between described mobile terminal and described base station.Also the region that, the distance of the first sub-stop device between mobile terminal and base station surpasses predetermined threshold is as the region of forbidding providing service.

Wherein, when the first sub-stop device surpasses predetermined threshold according to the distance between the 4th time span judgement mobile terminal and base station, stop described mobile terminal and include but not limited to the mode of communicating by letter between described base station:

A), when the 4th time span surpasses the scheduled time during length threshold, the first sub-stop device stops communicating by letter between mobile terminal and base station.Also, the first sub-stop device determines that over the scheduled time length threshold distance between mobile terminal and base station surpasses predetermined threshold by the 4th time span.

For example, it is unit that time span be take the time span of 1/8 chip, and be expressed as chip/8, the 4th time span that device AP obtains is 20.5 (chip/8), scheduled time length threshold is 19 (chip/8), the first sub-stop device is according to 20.5 > 19, and the distance that judgement moves between mobile terminal and base station surpasses predetermined threshold, and stops communicating by letter between mobile terminal and base station.

Because the 4th time span can reflect the distance between base station and mobile terminal, therefore, by surpassing the scheduled time when the 4th time span during length threshold, can think that the distance between base station and mobile terminal surpasses predetermined distance threshold.

B) the first sub-stop device is converted to distance by the 4th time span, and when the distance changed of judgement surpasses predetermined threshold, stops communicating by letter between mobile terminal and base station.

For example, it is unit that time span be take the time span of 1/8 chip, and within 1 second, comprise the individual chip of 1.228Mcps (megacycles per second), the time span of a chip is about 0.8138us, the time span of a chip is multiplied by the aerial propagation velocity of signal and is about 0.299311km/us, the propagation distance of picked up signal when the time span of a chip is about 0.244km, and in the time span of 1/8 chip, the aerial propagation distance of signal is about 30.5m.

Predetermined threshold is 500m, the 4th time span that the first determining device 2 obtains is 20.5 (chip/8), the first sub-stop device is according to 20.5*30.5=625.25 > 500, judgement mobile terminal is arranged in the region of forbidding providing service, and stops communicating by letter between mobile terminal and base station.

2) at stop device 3, also obtain in the situation that carry out signal between other base stations and mobile terminal and transmit the 7th required time span, stop device 3 is according to the 4th time span, the 7th time span and comprise described base station, described other base stations and described in forbid providing the cartographic information of positional information in the region of service, judge described mobile terminal forbids providing the region of service described in whether being arranged in, and when judging that according to described the 4th time span described mobile terminal is forbidden providing the region of service described in being arranged in, stop communicating by letter between described mobile terminal and described base station.This implementation will be described in detail with reference to the embodiment shown in FIG. 4, not repeat them here.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any when judging that according to the 4th time span described mobile terminal is arranged in while forbidding providing the region of service, stop the implementation of communicating by letter between described mobile terminal and described base station, all should be within the scope of the present invention.

Need to further illustrate, when judging that according to the 4th time span described mobile terminal is not arranged in while forbidding providing the region of service, the operation of stop device 3 not executive terminations communications, mobile terminal is communicated by letter with base station continuation.

In the present invention, by accurate Calculation, between mobile terminal and base station, carry out the required time span of signal transmission, can comparatively accurately judge whether the distance between mobile terminal and base station surpasses the scope that allows to provide service.For example, the present invention can be accurate to tens meters to the Distance Judgment between mobile terminal and base station, as 30m etc.

Acquisition device 1, the first determining device 2 and stop device 3 can be when mobile terminal and base station communicate a plurality of stage executable operations.For example, executable operations when transferring terminal and described base station and carry out call attempt; Again for example, after call attempt success, enter Traffic Channel executable operations etc. while communicating transferring terminal and base station.

As one of preferred version of the present embodiment, acquisition device 1, the first determining device 2 and stop device 3 be executable operations when call attempt is carried out in described handover terminal and described base station, and device AP also comprises the first final controlling element (not shown).When transferring terminal and base station, enter Traffic Channel while communicating, the first final controlling element triggers acquisition device 1, the first determining device 2 and stop device 3 and carries out at least one times again and operate.

Wherein, when transferring terminal and base station, enter Traffic Channel while communicating, the first final controlling element can trigger acquisition device 1, the first determining device 2 and stop device 3 and in pre-determined number, repeat operation.For example, pre-determined number is 2 times, and the first final controlling element can trigger acquisition device 1, the first determining device 2 and stop device 3 and repeat 2 executable operations.Preferably, when transferring terminal and base station, enter Traffic Channel while communicating, the first final controlling element can be in pre-determined number, with predetermined time interval triggering acquisition device 1, the first determining device 2 and stop device 3 executable operations.

For example, mobile terminal sends initial or paging corresponding information on access channel to base station, when base station receives the initial or paging corresponding information of mobile terminal transmission, the first final controlling element triggers acquisition device 1, the first determining device 2 and stop device 3 executable operations, when stop device 3 judgement mobile terminals are not positioned at the region of forbidding providing service, and mobile terminal is by the access attempts with base station, while entering Traffic Channel, the first final controlling element triggers acquisition device 1 again, the first determining device 2 and stop device 3 executable operations, if stop device 3 still judges that mobile terminal is not positioned at the region of forbidding providing service in epicycle operation, follow, according to pre-determined number, it is 2 times, predetermined time interval is 100ms, the first final controlling element again triggers acquisition device 1 after 100ms, the first determining device 2 and stop device 3 executable operations, then, owing to entering Traffic Channel when communication the first final controlling element at mobile terminal, trigger acquisition device 1, the first determining device 2 and stop device 3 executable operations 2 times, the first final controlling element no longer triggers acquisition device 1, the first determining device 2 and stop device 3 executable operations.

In upper example, when being positioned at stop device 3 judgement mobile terminals while forbidding providing the region of service, stop device 3 sends and releases order to mobile terminal, to avoid mobile terminal again automatically to make a call.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, anyly when transferring terminal and base station, enter Traffic Channel while communicating, trigger acquisition device 1, the first determining device 2 and stop device 3 and carry out again the implementation of operation at least one times, all should be within the scope of the present invention.

Because wireless transmission is subject to the impact of several factors (multipath, landform, reception delay etc.), in the situation that some are few, the measurement of the 4th time span RTD may produce deviation, in few situation, if but mobile terminal has passed through access attempts inspection has been physically located in while forbidding providing the region of service, will proceed call setup.The present embodiment, when mobile terminal enters Traffic Channel, continues to monitor at least one times the 4th time span RTD measured value in Traffic Channel, and is positioned at while forbidding providing the region of service when judgement mobile terminal, between termination mobile terminal and base station, communicates by letter.Preferably, mobile terminal enters after service signal, and step S1 to S3 sets up to call out when nothing responds in business and is performed, and can avoid affecting user as far as possible and experience.

As one of preferred version of the present embodiment, device AP also comprises the second final controlling element (not shown).When described the 4th time span belongs to predetermined abnormal ranges, the second final controlling element triggers acquisition device 1, the first determining device 2 and stop device 3 and re-executes operation.

Wherein, described predetermined abnormal ranges can comprise the scope that any the 4th time span should not belong to.Preferably, predetermined abnormal ranges includes but not limited to:

1) the 4th time span is less than zero;

2) the 4th time span differs larger with historical the 4th time span scope recording, and for example, is greater than 1 order of magnitude of maximum of the 4th time span scope that history records above etc.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, it is any when described the 4th time span belongs to predetermined abnormal ranges, trigger the implementation that acquisition device 1, the first determining device 2 and stop device 3 re-execute operation, all should be within the scope of the present invention.

In few situation, the 4th time span may be abnormal, by judging that the 4th time span belongs to predetermined abnormal ranges, can filter the exceptional value of the 4th time span, and re-execute operation and attempt to obtain normal the 4th time span by triggering acquisition device 1, the first determining device 2 and stop device 3, thereby reduce the possibility of erroneous judgement.

Fig. 4 be another preferred embodiment of the present invention in cdma system for judging whether to stop the structural representation of the device of communicating by letter between mobile terminal and base station.The device AP of the present embodiment comprises acquisition device 1, the first determining device 2, the second determining device 4 and is contained in judgment means 31 and the second sub-stop device 32 in stop device 3.

Acquisition device 1 and the first determining device 2 are described in detail with reference to the embodiment shown in FIG. 3, do not repeat them here.It should be noted that, in the present embodiment, the very first time length that acquisition device 1 obtains also comprises signal processing unit from send first signal to mobile terminal until receive the indirect communication time span between the feedback signal of the first signal that Xiang Gai base station, other base stations forwards.Also, acquisition device 1 was determined after direct Lifetime length according to the time that receives the earliest feedback signal, continued, mobile terminal time to the feedback signal of first signal that other base stations forward according to receiving, and determined indirect communication time span.

The second determining device 4 deducts under it the 6th required time span of signal transmission between signal transmission between base station and other base stations required the 5th time span, the 3rd time span, the second time span of twice and the described signal processing unit in described other base stations of twice and the signalling terminals of described other base stations by indirect communication time span, obtains the 7th time span.

Wherein, because the distance between base station and base station is fixed, therefore, the 5th time span is also normally fixed.The second determining device 4 can directly be obtained the 5th time span of determining in advance; Or the second determining device 4 can be according to the distance between definite in advance base station, the 5th time span converts; Or, the second determining device 4 can be to these other base station transmitted signals, thereby measure the distance between its affiliated base station and this other base stations, for example, by to these other base station transmitted signals until receive the time span between the feedback signal of these other base stations, deduct the second time span and the 6th time span, obtain the 5th time span etc.

Wherein, between base station and base station, the distance between signal processing unit and the signalling terminals of base station may be close.Therefore, the second determining device 4 can be directly using the second time span as the 6th time span; Or the second determining device 4 is obtained by manually offering in advance its 6th time span; Or the second determining device 4 is obtained the 6th time span that these other base stations offer it.

The second determining device 4 can comparatively accurately determine that between mobile terminal and other base stations of forwarding feedback signal, carrying out signal transmits the 7th required time span.

It should be noted that, between the operation that the first determining device 2 and the second determining device 4 are carried out, there is no sequencing.

Judgment means 31 is according to the 4th time span, the 7th time span and other base stations that comprise base station under device AP, described forwarding feedback signal and the cartographic information of positional information of forbidding providing the region of service, judges described mobile terminal forbids providing the region of service described in whether being arranged in.

Particularly, judgment means 31 can be determined the distance between base station and mobile terminal according to the 4th time span, and determine the distance between these other base stations and mobile terminal according to the 7th time span, in the situation that the position that cartographic information comprises base station under device AP, forwards other base stations of feedback signal and forbid providing the region of service, judgment means 31 can be on cartographic information the particular location of localisation of mobile terminals, thereby judge whether mobile terminal is arranged in the region of forbidding providing service.

It should be noted that, under device AP, base station may receive a plurality of other base stations forwardings, the feedback signal of mobile terminal to first signal, the second determining device 4 can be calculated a plurality of signals that carry out between mobile terminal and other base stations and transmits the 7th required time span, for example, under device AP, base station is base station BS 1, it receives the feedback information of other base station BSs 2 and BS3 forwarding, the second determining device 4 is calculated respectively and is transmitted the 7th required time span and between mobile terminal and other base station BSs 3, carry out signal and transmit the 7th required time span carrying out signal between mobile terminal and other base station BSs 2.

When judgement mobile terminal is forbidden providing the region of service described in being arranged in, the second sub-stop device 32 stops communicating by letter between described mobile terminal and described base station.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any according to the 4th time span, the 7th time span and comprise base station under device AP, other base stations of described forwarding feedback signal and forbidding provide the cartographic information of positional information in the region of service, judge described mobile terminal forbids providing the region of service described in whether being arranged in, and when forbidding providing the region of service described in judgement mobile terminal is arranged in, stop the implementation of communicating by letter between described mobile terminal and described base station, all should be within the scope of the present invention.

The present embodiment is by the position of localisation of mobile terminals more accurately, can block better the communication between the mobile terminal in region of forbidding providing service.

It should be noted that the present invention can be at software, hardware, and/or, in the assembly of software and hardware, be implemented, for example, can adopt application-specific integrated circuit (ASIC) (ASIC) or any other similar hardware device to realize device of the present invention.In one embodiment, software program of the present invention can carry out to realize step mentioned above or function by processor.Similarly, software program of the present invention (comprising relevant data structure) can be stored in computer readable recording medium storing program for performing, for example, and RAM memory, magnetic or CD-ROM driver or floppy disc and similar devices.In addition, steps more of the present invention or function can adopt hardware to realize, for example, thereby as coordinate the circuit of carrying out each step or function with processor.

To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to be included in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limiting related claim.In addition, obviously other unit or step do not got rid of in " comprising " word, and odd number is not got rid of plural number.A plurality of unit of stating in system claim or device also can be realized by software or hardware by a unit or device.The first, the second word such as grade is used for representing title, and does not represent any specific order.

Claims (15)

1. In cdma system for judging whether to stop the method for communicating by letter between mobile terminal and base station, wherein, the method comprises the following steps:

   A obtain signal processing unit in described base station from send first signal to described mobile terminal until receive this mobile terminal to the very first time length between the feedback signal of described first signal, at the second required time span of signal transmission between described signal processing unit and the signalling terminals of described base station and described mobile terminal, need the 3rd time span of time delay during in transmitted signal;

   B, according to described very first time length, described the second time span and described the 3rd time span, determines the 4th required time span of signal transmission between described signalling terminals and described mobile terminal;

   Wherein, the method is further comprising the steps of:

   I is when judging that according to described the 4th time span described mobile terminal is arranged in while forbidding providing the region of service, stops communicating by letter between described mobile terminal and described base station.
2. 2. method according to claim 1, wherein, described very first time length comprises described signal processing unit from send first signal to described mobile terminal until receive the direct Lifetime length between the described feedback signal that this mobile terminal directly sends to described base station, and described step b comprises the following steps:

   -described direct Lifetime length is deducted to described second time span of described the 3rd time span and twice, obtain described the 4th time span.
3. 3. method according to claim 2, wherein, described step I comprises the following steps:

   -when judging that according to described the 4th time span distance between described mobile terminal and described base station surpasses predetermined threshold, stop communicating by letter between described mobile terminal and described base station.
4. 4. method according to claim 2, wherein, described very first time length also comprises described signal processing unit from send first signal to described mobile terminal until receive the indirect communication time span between the described feedback signal that Xiang Gai base station, other base stations forwards, and the method is further comprising the steps of:

   -described indirect communication time span is deducted to the 6th required time span of signal transmission between signal transmission between described base station and described other base stations required the 5th time span, described the 3rd time span, described second time span of twice and the described signal processing unit in described other base stations of twice and the signalling terminals of described other base stations, obtain the 7th time span;

   Wherein, described step I comprises the following steps:

   -according to described the 4th time span, described the 7th time span and comprise described base station, described other base stations and described in forbid providing the cartographic information of positional information in the region of service, judge described mobile terminal forbids providing the region of service described in whether being arranged in;

   -when the described mobile terminal of judgement is forbidden providing the region of service described in being arranged in, stop communicating by letter between described mobile terminal and described base station.
5. 5. according at least one described method in claim 1 to 4, wherein, described step a, b and c are performed when call attempt is carried out in described handover terminal and described base station, and the method is further comprising the steps of:

   -when described handover terminal and described base station enter Traffic Channel while communicating, then carry out described step a, b and c at least one times.
6. 6. according to the method described in any one in claim 1 to 5, wherein, the method is further comprising the steps of:

   -when described the 4th time span belongs to predetermined abnormal ranges, re-execute described step a, b and c.
7. 7. according to the method described in any one in claim 1 to 6, wherein, described in obtain the 3rd time span that needs time delay when transmitted signal of mobile terminal step comprise:

   -according to following formula, determine described the 3rd time span:

   $\mathrm{PN}\_\mathrm{Rand}=\mathrm{floor}(N*\left((40503*(L\&CirclePlus;H\&CirclePlus;\mathrm{DECORR}))\mathrm{mod}{2}^{16}\right)/2^{16});$

   Wherein, PN_Rand represents described the 3rd time span, N=2 ^p, described P represents that base station broadcast is to the system parameters of described mobile terminal, L represents 16 bits of low order of the ESN of described mobile terminal, H represents 16 bits of high-order of the ESN of described mobile terminal, DECORR=14*ESN[0...11], floor represents bracket function, mod represents mod.
8. In cdma system for judging whether to stop the device of communicating by letter between mobile terminal and base station, wherein, this device comprises:

   Acquisition device, for the signal processing unit that obtains described base station from send first signal to described mobile terminal until receive this mobile terminal to the very first time length between the feedback signal of described first signal, at the second required time span of signal transmission between described signal processing unit and the signalling terminals of described base station and described mobile terminal, need the 3rd time span of time delay during in transmitted signal;

   The first determining device, for according to described very first time length, described the second time span and described the 3rd time span, determines the 4th required time span of signal transmission between described signalling terminals and described mobile terminal;

   Stop device, for when judging that according to described the 4th time span described mobile terminal is positioned at while forbidding providing the region of service, stops communicating by letter between described mobile terminal and described base station.
9. 9. device according to claim 8, wherein, described very first time length comprises described signal processing unit from send first signal to described mobile terminal until receive the direct Lifetime length between the described feedback signal that this mobile terminal directly sends to described base station, and described the first determining device comprises:

   Sub-determining device, for described direct Lifetime length being deducted to described second time span of described the 3rd time span and twice, obtains described the 4th time span.
10. 10. device according to claim 9, wherein, described stop device comprises:

    The first sub-stop device, for when judging that according to described the 4th time span distance between described mobile terminal and described base station surpasses predetermined threshold, stops communicating by letter between described mobile terminal and described base station.
11. 11. devices according to claim 9, wherein, described very first time length also comprises described signal processing unit from send first signal to described mobile terminal until receive the indirect communication time span between the described feedback signal that Xiang Gai base station, other base stations forwards, and this device is further comprising the steps of:

    The second determining device, for described indirect communication time span being deducted to the 6th required time span of signal transmission between signal transmission between described base station and described other base stations required the 5th time span, described the 3rd time span, described second time span of twice and the described signal processing unit in described other base stations of twice and the signalling terminals of described other base stations, acquisition the 7th time span;

    Wherein, described stop device comprises:

    Judgment means, for according to described the 4th time span, described the 7th time span and comprise described base station, described other base stations and described in forbid providing the cartographic information of positional information in the region of service, judge described mobile terminal forbids providing the region of service described in whether being arranged in;

    The second sub-stop device, for when the described mobile terminal of judgement is forbidden providing the region of service described in being positioned at, stops communicating by letter between described mobile terminal and described base station.
12. At least one described device in 12. according to Claim 8 to 11, wherein, described acquisition device, described the first determining device and described stop device be executable operations when call attempt is carried out in described handover terminal and described base station, and this device also comprises:

    The first final controlling element, for entering Traffic Channel when described handover terminal and described base station while communicating, triggers described acquisition device, described the first determining device and described stop device and carries out operation at least one times again.
13. Device in 13. according to Claim 8 to 12 described in any one, wherein, this device also comprises:

    The first final controlling element, for when described the 4th time span belongs to predetermined abnormal ranges, triggers described acquisition device, described the first determining device and described stop device and re-executes operation.
14. Device in 14. according to Claim 8 to 13 described in any one, wherein, described in obtain the 3rd time span that needs time delay when transmitted signal of mobile terminal operation comprise:

    -according to following formula, determine described the 3rd time span:

    $\mathrm{PN}\_\mathrm{Rand}=\mathrm{floor}(N*\left((40503*(L\&CirclePlus;H\&CirclePlus;\mathrm{DECORR}))\mathrm{mod}{2}^{16}\right)/2^{16});$

    Wherein, PN_Rand represents described the 3rd time span, N=2 ^p, described P represents that base station broadcast is to the system parameters of described mobile terminal, L represents 16 bits of low order of the ESN of described mobile terminal, H represents 16 bits of high-order of the ESN of described mobile terminal, DECORR=14*ESN[0...11], floor represents bracket function, mod represents mod.
15. 15. 1 kinds of base stations, comprise the device as described in claim 8 to 14 at least one.

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