CN100349492C - A method for extending covering distance of mobile service - Google Patents
A method for extending covering distance of mobile service Download PDFInfo
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- CN100349492C CN100349492C CNB2004100079109A CN200410007910A CN100349492C CN 100349492 C CN100349492 C CN 100349492C CN B2004100079109 A CNB2004100079109 A CN B2004100079109A CN 200410007910 A CN200410007910 A CN 200410007910A CN 100349492 C CN100349492 C CN 100349492C
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- 238000010295 mobile communication Methods 0.000 claims abstract description 32
- 238000012423 maintenance Methods 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000003044 adaptive effect Effects 0.000 claims description 7
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Abstract
The present invention discloses a method for extending the covering distance of mobile service. In the method, a wireless fixed access station MT is beforehand arranged in a zone which can receive base station wireless signals; a wireless connection function is respectively adapted to the wireless fixing access station and terminal devices TE in the blind zones; the terminal devices send mobile service data to the wireless fixing access station in a wireless mode in the uplink direction from the wireless fixing access station to base stations; the wireless fixing access station converts received mobile service data into mobile communication network wireless signals and sends the mobile communication network wireless signals to the base stations; the base stations send the mobile communication network wireless signals to the wireless fixing access station in the downlink direction from the base stations to the wireless fixing access station; the wireless fixing access station converts the received wireless signals into terminal device signals and sends the terminal device signals to the terminal devices. The method proposed by the present invention can greatly save input cost and satisfy the mobile service requirements of users in blind zones.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to a kind of method of extending the mobile service coverage distance.
Background technology
In recent years, progressively the improving and the continuous increase of bandwidth of the fast development of mobile communication technology, mobile network's infrastructure is for the extensive use of various mobile services (as speech business, data service and multimedia service etc.) provides the good basis environment.
In global mobile communication (GSM) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, CDMA 2000 (CDMA2000) system and time division SCDMA mobile communication system such as (TD-SCDMA), travelling carriage (MS) can be an entity with portable terminal (MT) function and terminal equipment (te) function, and the radio communication function and the relevant treatment function that enter mobile communications network by wave point are provided.Such as normally used mobile phone then is an entity of having gathered MT and TE function.In addition, MS also can be divided into MT functional entity and TE functional entity two parts, and the function of MT comprises: by the wave point accessing mobile communication network; The wireless signal of mobile communications network is converted to the signal that TE uses; Provide and TE between interface, TE then is the terminal equipment that the user uses.The equipment that uses such as users such as computer, facsimile machine and phones is during by wireless fixedly assess station access mobile communication net, and the equipment that users such as computer, facsimile machine and phone use then is the TE functional entity, and wireless fixedly assess station then is the MT functional entity.When the user use TE and by the MT accessing mobile communication network after just can carry out various mobile services such as voice call, transmitting-receiving multi-media SMS breath, fax and online.
Yet, in mobile communications network, because the area that network leak to cover or electric wave runs in communication process that building blocks and signals such as mountain valley, ubac are difficult to arrive, so the blind area that exists many wireless signals to cover in the network.Fig. 1 be in the prior art MT with the annexation schematic diagram between the TE.Referring to Fig. 1, in the prior art, when MS is divided into MT functional entity and TE functional entity, be connected by wired mode between TE and the MT.Since be subjected to the restriction of length of transmission line, can't be between MT and the TE at a distance of too far away, so when TE was positioned at the blind area, MT also was in the blind area probably.But in the blind area, MT can't receive the wireless signal of mobile communications network, thereby causes the user in the blind area can't carry out mobile service on TE.
In order to make the wireless signal can coverage hole, extend the coverage distance of mobile service, the solution of prior art is:
Method one, near the wireless signal of building the blind area between repeater relay base station and the travelling carriage:
Fig. 2 is that prior art is extended the schematic diagram of mobile service coverage distance by building the repeater.Referring to Fig. 2, can receive the wireless signal that send the base station in order to make the MT in the blind area, near the blind area, build the repeater.The repeater belongs to the frequency multiplying arrangement, is to play a kind of radio transmission transferring equipment that signal strengthens in the wireless communication transmissions process, and its basic function is radiofrequency signal to be carried out power strengthen.In the down link direction from the base station to TE, the repeater obtains wireless signal from existing overlay area, base station, to carrying out isolation filter with logical outer wireless signal, then filtered wireless signal is transmitted into the blind area by band pass filter after power amplifier amplifies.After MT in the blind area receives wireless signal, be converted into the discernible signal of subscriber terminal equipment, and be transferred to terminal equipment by the wireline interface between itself and the terminal equipment, the user can carry out various mobile services by terminal equipment.At the uplink direction from TE to the base station, the user terminal signal that MT sends terminal equipment TE is converted to wireless signal and sends to the base station by repeater filtering with after amplifying, make that the mobile service data of terminal equipment can be transferred to mobile communications network in the blind area, thereby extend the coverage distance of mobile service.
Method two, newly-built base station and transmission line:
Newly-built base station and transmission line near the blind area reach the purpose that the blind area wireless signal is covered, and make that the mobile service data of user terminal can be transferred to mobile communications network in the blind area, thus the coverage distance of extension mobile service.
As seen, there is following shortcoming in method one:
At first, only be the blind and newly-built repeater of particularly backwoodsman low capacity benefit, blind area, then input cost is excessive, and rate of return on investment is low.
Secondly, the mounting condition of repeater is relatively harsher, because the repeater for receiving sensitivity be lower than-wireless signal of 80dBm can not effectively amplify, so repeater and base station can not be at a distance of too far away, but, if the repeater is too near apart from the base station, then repeater and base station form overlapping covering, and mobile station signal is leaded up to time-delay back, repeater and arrived the base station, one the tunnel directly arrives the base station, will form multipath to the base station and disturb.
At last, the introducing repeater can worsen former base station operational environment, the covering radius minimizing to the above noise of the about 3dB of uplink signal increase of base station.
And second method exists long, shortcoming such as input cost is excessive and rate of return on investment is low of construction period.
And, when prior art using method one or method two, all be connected between MT and the TE, thereby make the installation site of MT and TE and distance be very restricted by wired mode.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method of extending the mobile service coverage distance, make it can save input cost greatly.
In order to achieve the above object, technical scheme of the present invention is achieved in that
A kind of method of extending the mobile service coverage distance, to be arranged on the area that can receive the base station radio signal by the wave point accessing mobile communication network and for terminal equipment TE provides the wireless fixedly assess station MT of interface in advance, and the adaptive respectively wireless function that continues of terminal equipment TE for communicating by letter with described wireless fixedly assess station in described wireless fixedly assess station and the blind area, this method also comprises:
At the uplink direction from the terminal equipment to the base station, the mobile service of self terminal equipment is modulated in the future, and send to wireless fixedly assess station with wireless mode, the mobile service demodulation that wireless fixedly assess station is received, and send to the base station after being converted to the wireless signal of mobile communications network;
In the down link direction from the base station to the terminal equipment, the wireless signal from the mobile communications network of base station that wireless fixedly assess station is received is converted to the signal that adapts to terminal equipment, modulates the back and sends to terminal equipment with wireless mode.
Described step for the adaptive respectively wireless function that continues of terminal equipment TE in wireless fixedly assess station MT and the blind area comprises:
In wireless fixedly assess station side, wireless fixedly assess station is linked to each other with the wireless adapting appts that continues, the parts that perhaps will have the wireless adaption function that continues are integrated in the wireless fixedly assess station;
In terminal equipment side, terminal equipment is linked to each other with the wireless adapting appts that continues, the parts that perhaps will have the wireless adaption function that continues are integrated in the terminal equipment.
The described wireless adapting appts that continues includes but not limited to Public CDMA WLL equipment, WLAN (wireless local area network) wlan device or bluetooth equipment; Described parts with the wireless adaption function that continues comprise bluetooth nest plate or WLAN nest plate.
Described future, the mobile service data of self terminal equipment comprised with the step that wireless mode sends to wireless fixedly assess station: the mobile service data of self terminal equipment has the parts of the wireless adaption function that continues by wireless continue adapting appts or the terminal equipment inside that links to each other with terminal equipment in the future, send to the wireless adapting appts that continues that links to each other with wireless fixedly assess station with wireless mode, be transferred to wireless fixedly assess station then;
Perhaps in the future the mobile service data of self terminal equipment has the parts of the wireless adaption function that continues by wireless continue adapting appts or the terminal equipment inside that links to each other with terminal equipment, directly sends to the parts that wireless fixedly assess station inside has the wireless adaption function that continues with wireless mode.
This method further comprises: the base station controller in the mobile communication system carries out real-time or non real-time remote monitoring and maintenance to the wireless ruuning situation that continues adapting appts and wireless fixedly assess station.
This method further comprises: the mobile service of terminal equipment being carried out according to time and data traffic charges.
The step that the described mobile service of terminal equipment being carried out according to time and data traffic charges comprises: be arranged on charge system in the terminal equipment or be connected terminal equipment and wireless fixedly between the assess station, terminal equipment is chargeed according to time and data traffic by charge system.
The step that the described mobile service of terminal equipment being carried out according to time and data traffic charges comprises: the core net CN in the mobile communication system chargeed to the Subscriber Identity Module in the wireless fixedly assess station according to time and data traffic.
Described mobile communication system includes but not limited to global mobile communication gsm system, Wideband Code Division Multiple Access (WCDMA) WCDMA system, CDMA 2000 CDMA2000 system and time division SCDMA TD-SCDMA system.
Described Public CDMA WLL equipment includes but not limited to cordless telephone or composite aircraft.
As seen, the method for the present invention's proposition has the following advantages:
1, the method for using the present invention to propose need not newly-built various transmission and radio reception device, thereby has saved input cost greatly.
2, in the method that the present invention proposes, be connected by wireless mode between the terminal equipment (te) in wireless fixedly assess station (MT) and the blind area, broken away from the constraint of transmission line, making between MT and the TE can the apart from each other distance, and then makes TE can pass through the MT accessing mobile communication network.
3, in the method that the present invention proposes, MT is placed in the position that can effectively receive the base station radio signal, and its installation process is simple and be easy to realize.
4, the method that proposes of the present invention has satisfied user's mobile service demand blind area the in, thereby is that user in the blind area brings great convenience.
5, in the method that the present invention proposes, use wireless fixedly assess station, can provide receiving sensitivity to be higher than the radio frequency reception channel of common mobile terminal, make the communication distance of wireless fixedly assess station and base station be far longer than the communication distance of common mobile terminal and base station, thereby embody the advantage of the method prolongation mobile service coverage distance of the present invention's proposition more.
Description of drawings
Fig. 1 be in the prior art MT with the annexation schematic diagram between the TE;
Fig. 2 is that prior art is extended the schematic diagram of mobile service coverage distance by building the repeater;
Fig. 3 is the access reference configuration schematic diagram of the Public Land Mobile Network (PLMN) of GSM;
Fig. 4 is the interface logic schematic diagram between each equipment in the embodiment that realizes the inventive method;
Fig. 5 is the application schematic diagram that the present invention in an embodiment proposes method;
Fig. 6 realizes the logic connection diagram between each equipment among the embodiment of the inventive method;
Fig. 7 realizes the flow chart of the embodiment of the inventive method at uplink direction;
Fig. 8 is a flow chart of realizing reporting among the embodiment of the inventive method MT and TA monitor message;
Fig. 9 is a flow chart of realizing passing down among the embodiment of the inventive method MT and TA maintenance information.
Embodiment
Core concept of the present invention is: for the TE in MT and the blind area disposes the wireless adapting appts that continues respectively, MT is connected with the wireless technology that TE provides by the wireless adapting appts that continues and communicates by letter, thereby make the distance that MT and TE can apart from each others, be that MT can be in the area, non-blind area that can receive the base station radio signal, thereby satisfy the mobile service demand of user terminal in the blind area.
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Present embodiment extends the mobile service coverage distance in the gsm system.
Fig. 3 is the access reference configuration schematic diagram of the Public Land Mobile Network (PLMN) of GSM.Referring to Fig. 3, in gsm protocol, terminal equipment (te), terminal adaptive (TA) and portable terminal (MT) have following classification:
Terminal equipment 1 (TE1)=integrated services digital network terminal (ISDN terminal);
Terminal equipment 2 (TE2)=V or X series terminal (V-or X-type terminal);
Portable terminal 0 (MT0) is meant to comprise the portable terminal of data terminal and adaption function integrated;
Portable terminal 1 (MT1) provide isdn interface, and ISDN is provided adaption function;
Portable terminal 2 (MT2) provides the adaption function of CCITT V-series or X-series;
Terminal adaptive (TA, Terminal Adaptor);
Base station sub-system (BSS, Base Station System);
Mobile switching centre (MSC, Mobile Switching Centre).
In gsm system, MT is by the standing part base station sub-system of wave point (Um Interface) access gsm system, and it is that MT supports the phone control protocol of R/S standard interface and the data protocol of ISDN that MT provides the network capabilities of voice-and-data.
According to gsm protocol, present embodiment uses wireless fixedly assess station as MT2, Public CDMA WLL equipment be the secondary machine of Public CDMA WLL main frame and Public CDMA WLL as terminal adaptive (TA), the normal telephone machine of Public Switched Telephone Network is as TE2.Wireless fixedly assess station is finished two functions, promptly finishes mobile terminal function and the adaption function that CCITT V-series or X-series (as normal telephone machine, facsimile machine etc.) are provided.
In the present embodiment, normal telephone machine user is in the village of outlying mountain area, but the village of outlying mountain area is seated at the foot of the hill or in the mountain valley, owing to the mountain peak stop or network leaks reasons such as covering, in the village, can't receive the wireless signal that the BTS by the base station sends, therefore, belong to signal blind zone in the village.
Fig. 4 is the interface logic schematic diagram between each equipment in the embodiment that realizes the inventive method, and Fig. 5 is the application schematic diagram that the present invention in an embodiment proposes method.Referring to Fig. 4 and Fig. 5, the village is about 5～10 kilometers to the distance of closing on the mountain top, and can receive on the mountain top-gsm wireless signal about 90dBm.Therefore, (BTS) is erected on the high mountain with the base transceiver station in the base station sub-system 402, and adopts the wide mulching method of Da Qu to transmit.On the accessibility high mountain of wireless signal that wireless fixedly assess station 401 is erected at BTS, adopt high-gain aerial and high-power emission.Wireless fixedly assess station 401 inserts the base station sub-system 402 of gsm system by Um Interface, and passes through telephony interface (R interface) connection Public CDMA WLL main frame 403.In the village, connect secondary machine 404 of Public CDMA WLL and normal telephone machine 405 by telephony interface (R interface).
Fig. 6 realizes the logic connection diagram between each equipment among the embodiment of the inventive method, and Fig. 7 realizes the flow chart of the embodiment of the inventive method at uplink direction.Referring to Fig. 5, Fig. 6 and Fig. 7, at the uplink direction from wireless fixedly assess station 401 to base station sub-system 402, the method that the present invention proposes realizes that the detailed process of extending the mobile service coverage distance may further comprise the steps:
Step 701: in the village, two line analog signals that the user produces when using 405 conversations of normal telephone machine and Dual Tone Multifrequency subscriber signaling are sent to the secondary machine 404 of Public CDMA WLL by telephone wire.
Step 702: two line analog signals and DTMF subscriber signaling that secondary 404 pairs in the machine of Public CDMA WLL receives are carried out frequency shift keying (FSK) modulation, and it is on the frequency range that is fit to long-distance transmissions.Owing to connect by wireless mode between the secondary machine 404 of Public CDMA WLL main frame 403 and Public CDMA WLL, so two line analog signals after the secondary machine 404 of Public CDMA WLL will be modulated and DTMF subscriber signaling send Public CDMA WLL main frame 403 on the high mountain to wireless mode.
Step 703: two line analog signals and DTMF subscriber signaling that Public CDMA WLL main frame 403 will receive are carried out demodulation, and two line analog signals after the demodulation and DTMF subscriber signaling are transferred to wireless fixedly assess station 401 by telephone wire.
Step 704: two line analog signals and DTMF subscriber signaling that wireless fixedly assess station 401 will receive are converted to the GSM digital signal, and the GSM digital signal after will changing by Um Interface sends to the BTS in the base station sub-system 402, and then be transferred to mobile switching centre (MSC), by MSC ordinary telephone subscriber in the village and called subscriber's voice calling service is controlled.
Referring to Fig. 5 and Fig. 6, in down link direction from base station sub-system to wireless fixedly assess station, the method that the present invention proposes realizes that the detailed process of extending the mobile service coverage distance comprises: the BTS in the base station sub-system 402 will be transmitted into wireless fixedly assess station 401 by the GSM digital signal that MSC sends, wireless fixedly assess station 401 is transferred to Public CDMA WLL main frame 403 after the GSM digital signal is converted to two line analog signals and DTMF subscriber signaling, 403 pairs of these signals of Public CDMA WLL main frame and signaling are modulated the back and are sent to the secondary machine 404 of Public CDMA WLL in the village by wireless transmission method, the secondary machine of Public CDMA WLL carries out being transferred to normal telephone machine 405 after the demodulation with signaling to the received signal, normal telephone machine 405 users and called subscriber's voice calling service in the realization village.
Preferably, for the mobile service that guarantees to extend can normally carry out, the base station controller in the present embodiment in the GSM base station sub-system (BSC) carries out remote monitoring and maintenance to wireless fixedly assess station with as the Public CDMA WLL main frame of the wireless adapting appts that continues and the operation conditions of secondary machine.Fig. 8 is a flow chart of realizing reporting among the embodiment of the inventive method MT and TA monitor message, and Fig. 9 is a flow chart of realizing passing down among the embodiment of the inventive method MT and TA maintenance information.Referring to Fig. 8, at up direction, the detailed process that BSC carries out remote monitoring to the operation conditions of wireless fixedly assess station and Public CDMA WLL main frame and secondary machine may further comprise the steps:
Alarm monitoring module in step 801, the secondary machine of Public CDMA WLL is gathered the facility informations such as power supply, temperature, Radio Link and circuit module of the secondary machine of Public CDMA WLL, and the facility information that collects is sent to the Public CDMA WLL main frame.
Alarm monitoring module in step 802, the Public CDMA WLL main frame is gathered the facility information of Public CDMA WLL main frame, and sends to wireless fixedly assess station together with the facility information of the secondary machine of the Public CDMA WLL that receives.
Alarm monitoring module in step 803, the wireless fixedly assess station is gathered the facility information of wireless fixedly assess station, and sends to BTS together with the facility information of Public CDMA WLL main frame and the secondary machine of Public CDMA WLL.
Referring to Fig. 9, at down direction, the detailed process that BSC carries out remote maintenance to the operation conditions of wireless fixedly assess station and Public CDMA WLL main frame and secondary machine may further comprise the steps:
The process that BSC carries out remote monitoring and maintenance to the operation conditions of wireless fixedly assess station and Public CDMA WLL main frame and secondary machine can be real-time also can be non real-time.When realizing with real-time mode, facility information and maintenance information are transmitted with mobile service data.And when realizing in the non real-time mode, in each level of secondary machine from BSC to the Public CDMA WLL, the higher level regularly sends querying command to subordinate, and the facility information that reports self behind the querying command is received by subordinate.
Preferably, present embodiment can charge to the voice calling service that the user carries out on the normal telephone machine.Its implementation is:
The core net of method 2, gsm system (CN) is chargeed to the Subscriber Identity Module (SIM card) in the wireless fixedly assess station according to the air time and the data traffic of normal telephone machine.
Realize extending in the detailed process of mobile service coverage distance at the above, described Public CDMA WLL equipment can use communication equipments such as cordless telephone and composite aircraft.
In the present embodiment, the wireless adapting appts that continues of MT side (being the Public CDMA WLL main frame) is outside the functional entity (promptly moving fixedly assess station) of MT, and the wireless adapting appts that continues of TE side (being the secondary machine of Public CDMA WLL) is outside the functional entity (being the normal telephone machine) of TE.In other embodiment beyond the present embodiment, also the wireless adapting appts that continues can be integrated into the functional entity inside of MT or TE, such as, when carrying out the wireless transmission of mobile service data between MT and the TE by Bluetooth technology, the bluetooth nest plate can be integrated in the functional entity of MT or TE, the principle that its specific implementation is extended the mobile service coverage distance is identical with the principle of the described process of present embodiment.
Present embodiment is to extend the mobile service coverage distance in gsm system in the village in outlying mountain area, realizes that in other mobile communication system the principle of extension mobile service coverage distance is identical with the principle of the described process of present embodiment.
In the present embodiment, what carry out between MT and the TE is point-to-point mobile service data transmission, among other embodiment beyond the present embodiment, also can carry out point-to-multipoint promptly a MT and a plurality of TE or multi-multipoint be that a plurality of MT transmit with the mobile service data of a plurality of TE respectively.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of method of extending the mobile service coverage distance, it is characterized in that, to be arranged on the area that can receive the base station radio signal by the wave point accessing mobile communication network and for terminal equipment TE provides the wireless fixedly assess station MT of interface in advance, and the adaptive respectively wireless function that continues of terminal equipment TE for communicating by letter with described wireless fixedly assess station in described wireless fixedly assess station and the blind area, this method also comprises:
At the uplink direction from the terminal equipment to the base station, the mobile service of self terminal equipment is modulated in the future, and sends to wireless fixedly assess station with wireless mode; The mobile service demodulation that wireless fixedly assess station is received, and send to the base station after being converted to the wireless signal of mobile communications network;
In the down link direction from the base station to the terminal equipment, the wireless signal from the mobile communications network of base station that wireless fixedly assess station is received is converted to the signal that adapts to terminal equipment, modulates the back and sends to terminal equipment with wireless mode.
2, method according to claim 1 is characterized in that, described step for the adaptive respectively wireless function that continues of terminal equipment TE in wireless fixedly assess station MT and the blind area comprises:
In wireless fixedly assess station side, wireless fixedly assess station is linked to each other with the wireless adapting appts that continues, the parts that perhaps will have the wireless adaption function that continues are integrated in the wireless fixedly assess station;
In terminal equipment side, terminal equipment is linked to each other with the wireless adapting appts that continues, the parts that perhaps will have the wireless adaption function that continues are integrated in the terminal equipment.
3, method according to claim 2 is characterized in that, the described wireless adapting appts that continues comprises Public CDMA WLL equipment, WLAN (wireless local area network) wlan device or bluetooth equipment; Described parts with the wireless adaption function that continues comprise bluetooth nest plate or WLAN nest plate.
4, according to claim 2 or 3 described methods, it is characterized in that, described future, the mobile service data of self terminal equipment comprised with the step that wireless mode sends to wireless fixedly assess station: the mobile service data of self terminal equipment has the parts of the wireless adaption function that continues by wireless continue adapting appts or the terminal equipment inside that links to each other with terminal equipment in the future, send to the wireless adapting appts that continues that links to each other with wireless fixedly assess station with wireless mode, be transferred to wireless fixedly assess station then;
Perhaps in the future the mobile service data of self terminal equipment has the parts of the wireless adaption function that continues by wireless continue adapting appts or the terminal equipment inside that links to each other with terminal equipment, directly sends to the parts that wireless fixedly assess station inside has the wireless adaption function that continues with wireless mode.
5, method according to claim 4, it is characterized in that this method further comprises: the base station controller in the mobile communication system carries out real-time or non real-time remote monitoring and maintenance to the wireless ruuning situation that continues adapting appts and wireless fixedly assess station.
6, method according to claim 1 is characterized in that, this method further comprises: the mobile service of terminal equipment being carried out according to time and data traffic charges.
7, method according to claim 6, it is characterized in that, the step that the described mobile service of terminal equipment being carried out according to time and data traffic charges comprises: be arranged on charge system in the terminal equipment or be connected terminal equipment and wireless fixedly between the assess station, terminal equipment is chargeed according to time and data traffic by charge system.
8, method according to claim 6, it is characterized in that the step that the described mobile service of terminal equipment being carried out according to time and data traffic charges comprises: the core net CN in the mobile communication system chargeed to the Subscriber Identity Module in the wireless fixedly assess station according to time and data traffic.
9, method according to claim 1, it is characterized in that described mobile communication system comprises global mobile communication gsm system, Wideband Code Division Multiple Access (WCDMA) WCDMA system, CDMA 2000 CDMA2000 system and time division SCDMA TD-SCDMA system.
10, method according to claim 3 is characterized in that, described Public CDMA WLL equipment comprises cordless telephone or composite aircraft.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100079109A CN100349492C (en) | 2004-03-05 | 2004-03-05 | A method for extending covering distance of mobile service |
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| CNB2004100079109A CN100349492C (en) | 2004-03-05 | 2004-03-05 | A method for extending covering distance of mobile service |
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| CN100349492C true CN100349492C (en) | 2007-11-14 |
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| CN101521901A (en) * | 2008-02-25 | 2009-09-02 | 华为技术有限公司 | Method, system and equipment for detecting blind areas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5659879A (en) * | 1993-07-30 | 1997-08-19 | Alcatel N.V. | Method of covering shadow areas in a cellular mobile radio system and radio booster for implementing this method |
| WO2003071716A1 (en) * | 2002-02-21 | 2003-08-28 | Innoace Co., Ltd. | Broadband wireless repeater for mobile communication system |
| CN1457160A (en) * | 2002-12-31 | 2003-11-19 | 北京信威通信技术股份有限公司 | Direct transmitting station for synchronous CDMA system and its control |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5659879A (en) * | 1993-07-30 | 1997-08-19 | Alcatel N.V. | Method of covering shadow areas in a cellular mobile radio system and radio booster for implementing this method |
| WO2003071716A1 (en) * | 2002-02-21 | 2003-08-28 | Innoace Co., Ltd. | Broadband wireless repeater for mobile communication system |
| CN1457160A (en) * | 2002-12-31 | 2003-11-19 | 北京信威通信技术股份有限公司 | Direct transmitting station for synchronous CDMA system and its control |
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| CN1665331A (en) | 2005-09-07 |
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