CN100407821C - Raio frequency back plate capable of realizing configuration switched - Google Patents
Raio frequency back plate capable of realizing configuration switched Download PDFInfo
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- CN100407821C CN100407821C CN2003101193484A CN200310119348A CN100407821C CN 100407821 C CN100407821 C CN 100407821C CN 2003101193484 A CN2003101193484 A CN 2003101193484A CN 200310119348 A CN200310119348 A CN 200310119348A CN 100407821 C CN100407821 C CN 100407821C
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Abstract
The present invention relates to a back plate and a radio-frequency technology, which discloses a radio-frequency back plate capable of realizing the switching of configurations. The present invention solves the problem that the switching of the configurations in a communication system is controlled by a module. The number of mobile communication modules and the number of signal wires of the system are reduced, and thereby, the maintenance of the system is simplified. The present invention supports the touch inserting and the touch pulling of a radio-frequency module and supports the operation of the switching of the configurations of the system at the front face of a cabinet, and the space in the cabinet is saved. The radio-frequency back plate capable of realizing the switching of the configurations comprises a radio-frequency switching module and a radio-frequency jumper wire, wherein the radio-frequency switching module is used for separating and combining radio-frequency signals and comprises radio-frequency jumper wire ports; the radio-frequency jumper wire is used for connecting the radio-frequency jumper wire ports to realize the switching of different configurations.
Description
Technical field
The present invention relates to backboard and radio-frequency technique, realize on backboard that particularly the configuration of radio system is switched.
Background technology
In multi-carrier broadband code division multiple access (Wideband Code Division Multiple Access is called for short " WCDMA ") system, the implementation of base station path as shown in Figure 1.Wherein, f1～f4 is a sender, and they adopt a plurality of carrier waves respectively, and the signal of each sender enters synthesizer after different carrier modulation synthetic, amplifies by duplexer through power amplifier to enter the antenna emission again.
Because code division multiple access (Code Division Multiple Access, abbreviation " CDMA ") system is from the system of disturbing, the signal of each channel all is the noise of other channel, therefore can reduce the overall noise of system by adopting directional antenna in cdma system.For example, in the WCDMA system, usually 360 ° emission angle can be divided into the sector of three 120 ° non-overlapping copies, a directional antenna is adopted in each sector, each antenna covers 120 ° zone, under same traffic load, the noise of disturbing certainly of system can be reduced to the system of 360 ° of emission angle antennas of original employing from disturbing 1/3 of noise like this.Based on same principle,, the WCDMA system make the noise of disturbing certainly of system reduce to 1/6 thereby also can being divided into 360 ° emission angle the sector of six 60 ° non-overlapping copies.
When using multi-sector base stations, can adopt a plurality of carrier waves again in each sector, thereby realize many sectors multi-carrier communication.Adopt this mode both can effectively increase the message capacity of system and effectively reduced system disturb noise certainly.
In the WCDMA system, when full configuration is put in a radio frequency frame usually, dispose 12 transceivers altogether.When in the WCDMA system, realizing 3 sectors, 4 carrier waves, the schematic diagram of transmission channel such as Fig. 2.When in WCDMA, realizing 6 sectors, 2 carrier waves, the schematic diagram of transmission channel such as Fig. 3.They can regard the combination of a plurality of multicarrier WCDMA systems shown in Figure 1 respectively as, but the antenna that uses in the multicarrier system of many sectors is a directional antenna.When concrete the use, the radio frequency frame that full configuration is put is to adopt 3 sectors, 4 carrier waves or 6 sectors, 2 carrier waves can be configured by the actual needs of network, needs to support to divide from 3 sector configuration the configuration of 6 sectors, promptly needs the configuration of back-up system to switch.
The configuration that will realize system in the WCDMA base station system is switched, and existing technology generally is to realize that by increase a handover module in rack its system forms as Fig. 4.
Need to prove that in this article, for identical two devices of distinctive function, adopt the method for " device label-numeral " to distinguish, the device function that the device label is identical is identical.
As shown in Figure 4, when base station configuration is 3 sectors, 4 carrier waves, transceiver 10-1,10-2,10-3,10-4 belong to same sector.
After upward signal receives by antenna 60-1, enter low noise amplifier (Low Noise Amplifier through duplexer 50-1, abbreviation " LNA ") 30-1 amplifies, in configuration handover module 20, carry out signal along separate routes, the splitter 21-1 that use in the handover module 20 this moment is 1 minute 4 splitter, is transferred to 4 transceiver 10-1 respectively, 10-2,10-3 is among the 10-4.Downstream signal is through transceiver 10-1,10-2,10-3,10-4 carries out upconversion process, carry out signal in configuration in the handover module 20 and close the road, the mixer 22-1 of 20 pairs of uses of handover module this moment 4 closes 1 mixer, closes the road signal by linear power amplifier (Linear Power Amplifier, abbreviation " LPA ") 40-1 enters duplexer 50-1 and carries out filtering, is transmitted in the air through antenna 60-1 then.
When base station configuration is 6 sectors, 2 carrier waves, transceiver 10-1,10-2,10-3,10-4 adhere to two different sectors separately.Transceiver 10-1,10-2 belong to a sector, are referred to as sector 1; Transceiver 10-3,10-4 belong to another sector, are referred to as sector 2.1 minute 4 splitter that use when disposing handover module 20 with 3 sectors this moment switches to two 1 fen 2 splitters, closes 1 mixer with 4 and switches to two 2 and close 1 mixer.
In sector 1, upward signal enters LNA30-1 through duplexer 50-1 and amplifies after receiving by antenna 60-1, carries out signal along separate routes in configuration handover module 20, after the signal process splitter 21-1 shunt of this sector, be transferred to respectively among two transceiver 10-1 and the 10-2; Downstream signal is gone up the change processing through transceiver 10-1 and 10-2, in configuration handover module 20, carry out signal and close the road, after the signal of this sector closes the road through mixer 22-1, close the road signal and enter duplexer 50-1 by LPA40-1 and carry out filtering, be transmitted in the air through antenna 60-1 then.
In sector 2, upward signal enters LNA30-2 through duplexer 50-2 and amplifies after receiving by antenna 60-2, carries out signal along separate routes in configuration handover module 20, after the signal process splitter 21-2 shunt of this sector, be transferred to respectively among two transceiver 10-3 and the 10-4; Downstream signal is gone up the change processing through transceiver 10-3 and 10-4, in configuration handover module 20, carry out signal and close the road, after the signal of this sector closes the road through mixer 22-2, close the road signal and enter duplexer 50-2 by LPA40-2 and carry out filtering, be transmitted in the air through antenna 60-2 then.
Only indicated 4 in 12 transceivers that radio frequency frame full configuration puts herein for convenience of description, those of ordinary skill in the art are appreciated that similar illustrated 4 transceivers of the connected mode of other 8 transceivers.
Existing technology also can be handled radiofrequency signal on backboard, be referred to as the radio frequency backboard, and the radio frequency backboard is used widely in the radio frequency frame of existing mobile communications system.In the design of radio frequency backboard, the RF blind insertion technology of Chu Xianing made the veneer of module can directly be connected by special connector with backboard, thereby can simplify the design of radio-frequency module greatly, thereby was widely used in recent years.
In actual applications, there is following problem in such scheme: the scheme that at first existing realization configuration is switched need increase a new module in system, and the scheme that secondly existing realization configuration is switched will cause increasing in the system many stube cables.
Cause the main cause of this situation to be, the scheme that existing realization configuration is switched is to realize the switching of system configuration by design electronic switch or wire jumper in module, therefore need to increase a new module, all modules in this module and the radio frequency frame all need have holding wire to be connected in addition, so have increased many stube cables in system.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of raio frequency back plate capable of realizing configuration switched, making that the present situation of being born by module is switched in configuration in the communication system is resolved, the holding wire quantity of the module number of mobile communication and system is reduced, thereby the space in the rack is saved in the maintenance of simplified system.
In order to solve the problems of the technologies described above, the invention provides a kind of raio frequency back plate capable of realizing configuration switched, described radio frequency backboard comprises radio frequency handover module and radio frequency wire jumper;
Described radio frequency handover module comprises a plurality of continuous mixers and splitter, and described radio frequency handover module also comprises radio frequency wire jumper port;
Described radio frequency wire jumper is used for connecting described radio frequency wire jumper port to realize the switching of different configurations.
Wherein, the described radio frequency handover module that is used to handle radiofrequency signal directly is connected with described radio frequency backboard by blind slotting technology.
Described backboard also comprises attenuator, is used for making by deamplification power the power equalization of different branch, and described attenuator comprises described radio frequency wire jumper port.
Described radio frequency backboard is provided with described radio frequency wire jumper port to realize the switching of system configuration in the backboard front.Described backboard adopts digital signal and radiofrequency signal back plate design altogether.
By relatively finding, technical scheme difference with the prior art of the present invention is, the present invention does not use module and the directly configuration switching of realization system on the radio frequency backboard, radiofrequency signal is closed road or shunt on backboard, configuration is switched by realizing with the corresponding radio frequency wire jumper interface on the radio frequency wire jumper connection backboard, supporting configuration to switch in the rack front finishes, thereby support rack to install by wall, all radio-frequency module veneers all use the RF blind insertion technology directly to link to each other with the radio frequency backboard, and the radio frequency backboard is supported the transmission of high-speed digital signal simultaneously.
Difference on this technical scheme has brought comparatively significantly beneficial effect, promptly because disposed interlock circuit on backboard, does not therefore need extra module can realize that the configuration of system switches, and has reduced the module number of mobile communication.Because used the RF blind insertion technology, radio-frequency module directly is connected with backboard, no longer needs a large amount of connection radio frequency lines in addition, thereby make system more stable, safeguard easylier, the space in the rack is saved more, and system supports front maintenance, and system can lean on wall to install.
Description of drawings
Fig. 1 is the implementation of base station passage in the WCDMA system;
Fig. 2 is the schematic diagram of transmission channel when realizing 3 sectors, 4 carrier waves in the WCDMA system;
Fig. 3 is the schematic diagram of transmission channel when realizing 6 sectors, 2 carrier waves in the WCDMA system;
Fig. 4 is that the existing system that realizes that in the WCDMA system configuration is switched forms;
Fig. 5 is the raio frequency back plate capable of realizing configuration switched system construction drawing according to a preferred embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention program adopts the radio frequency backplane technology, mixer by design radiofrequency signal on the radio frequency backboard, splitter and sector commutation circuit realize the configuration switching, radio-frequency module adopts the RF blind insertion technology directly to connect with being connected of radio frequency backboard, system's 3 sectors, 4 carrier waves are finished by the wire jumper conversion in backboard front to the switching of 6 sectors, 2 intercarriers, support cabinet front to safeguard.
Below in conjunction with a preferred embodiment of the present invention the present invention program is described.The system construction drawing of this embodiment such as Fig. 5.
Among Fig. 5, raio frequency back plate capable of realizing configuration switched according to an embodiment of the invention system is by transceiver 10 (10-5,10-6,10-7,10-8), radio frequency backboard 70, LNA30 (30-3,30-4), LPA40 (40-3,40-4), duplexer 50 (50-3,50-4), antenna 60 (60-3,60-4) and some radio frequency wire jumpers 80 (80-1,80-2) are formed.Wherein, radio frequency backboard 70 also comprises some one-to-two circuit 71 (71-1,71-2,71-3), some two-in-one circuit 72 (72-1,72-2,72-3), attenuator 73 (73-1,73-2) and radio frequency wire jumper port 74 (74-1,74-2,74-3,74-4,74-5,74-6) are formed.Radio frequency wire jumper 80 also comprises two radio frequency wire jumper ports 81 (81-1,81-2).
As shown in Figure 5, in the present embodiment, transceiver 10 is connected with radio frequency backboard 70, wherein, per two transceivers 10 are one group, the output of the transceiver 10 on the same group is connected to the input of identical two-in-one circuit 72, and the input of the transceiver 10 in is connected to the output of identical one-to-two circuit 71 on the same group; Radio frequency backboard 70 is received RF signal and the radiofrequency signal after the road is closed in the LPA40 transmission from LNA30; LNA30 and LPA40 form a pair of, are respectively applied for from a duplexer 50 to receive and to these duplexer 50 output radiofrequency signals; Duplexer 50 is connected on the antenna 60 by radio frequency line, and each duplexer 50 connects an antenna 60.
Need to prove that in a preferred embodiment of the present invention, all radio-frequency module veneers directly are connected by the RF blind insertion technology with described radio frequency backboard.
Transceiver 10 is used to receive and send messages, and the uplink and downlink signal is handled accordingly.This module is conventionally known to one of skill in the art, can adopt different carrier waves.
One-to-two circuit 71-1 is used for providing respectively output interface to be connected for two groups of transceivers 10 with 71-3, and two-in-one circuit 72-1 is used for providing respectively input interface to be connected for two groups of transceivers 10 with 72-3.The input of one-to-two circuit 71-1 is connected with the output of one-to-two circuit 71-2, and the input of one-to-two circuit 71-3 is connected with radio frequency wire jumper port 74-3.In a preferred embodiment of the present invention, transceiver 10-5 and 10-6 are one group, and their input/output terminal is connected with the output of one-to-two circuit 71-1 and the input of two-in-one circuit 72-1 respectively.
One-to-two circuit 71-1 and two-in-one circuit 72-1 are connected with 10-6 with one group of transceiver 10-5 as one group.
One-to-two circuit 71-2 and two-in-one circuit 72-2 are connected respectively with LPA40-3 with pair of L NA30-3 as one group.Wherein, one-to-two circuit 71-2 also provides a radio frequency wire jumper port 74-1 at output, and two-in-one circuit 72-2 also provides a radio frequency wire jumper port 74-2 at input.
One-to-two circuit 71-3 and two-in-one circuit 72-3 are connected with 10-8 with one group of transceiver 10-7 as one group.Wherein, one-to-two circuit 71-2 also provides a radio frequency wire jumper port 74-3 at input, and two-in-one circuit 72-2 also provides a radio frequency wire jumper port 74-5 at output.
Attenuator 73-1 and 73-2 are connected respectively with LPA40-4 with pair of L NA30-4 as one group.Wherein, the input of the output of attenuator 73-1 and attenuator 73-2 also provides radio frequency wire jumper port 74-4 and 74-6 respectively.
LNA30 is used for receiving up radiofrequency signal and carrying out the low noise amplification from duplexer 50.This module is conventionally known to one of skill in the art.
LPA40 is used for from the line linearity power amplification of going forward side by side of radio frequency backboard 70 received RF signals.This module is conventionally known to one of skill in the art.
Duplexer 50 is used for from the to be sent radiofrequency signal of antenna 60 received RF signals after antenna 60 provides filtered synthesizing.This module is conventionally known to one of skill in the art.
Antenna 60 is used for receiving or sending radiofrequency signal.Wherein, the emission angle of antenna 60 can be selected, and for example, under 4 carrier modes of 3 sectors, the emission angle of antenna 60 is 120 °; Under 2 carrier modes of 6 sectors, the emission angle of antenna 60 is 60 °.
The radio frequency wire jumper port 74 that radio frequency wire jumper 80 is used to connect radio frequency backboard 70 and provides switches to realize configuration.Wherein, two the radio frequency wire jumper ports 81 and the radio frequency wire jumper port 74 that provide of radio frequency wire jumper 80 forms a pair of connectivity port that can interconnect.
In a preferred embodiment of the present invention, if base station configuration is 3 sectors, 4 carrier waves, transceiver 10-5,10-6,10-7,10-8 belong to same sector.
After upward signal receives by antenna 60-3, entering LNA30-3 through duplexer 50-3 amplifies, signal is incorporated in the radio frequency backboard 70, shunt on one-to-two circuit 71-1 and the radio frequency wire jumper port 74-1 behind the signal process one-to-two circuit 71-2, after the signal one-to-two shunt of 71-1, be directly connected to transceiver 10-5 and 10-6, signal to radio frequency wire jumper port 74-1 is connected to radio frequency wire jumper port 74-3 by radio frequency wire jumper 80, being about to radio frequency wire jumper port 81-1 links to each other with radio frequency wire jumper port 74-1, radio frequency wire jumper port 81-2 is connected with radio frequency wire jumper port 74-3, this road signal through being connected to transceiver 10-7 and 10-8 after the shunt of one-to-two circuit 71-3 one-to-two, has so just been realized 1 minute 4 shunt function of upward signal again.
Downstream signal is divided into two parts, transceiver 10-5, and transmitting of 10-6 enters radio frequency backboard 70, after synthesizing through two-in-one circuit 72-1, is transferred on the two-in-one circuit 72-2; Transceiver 10-7, after the two-in-one circuit 72-3 of process that transmits of 10-8 is synthetic, be transferred on the radio frequency wire jumper port 74-5, be connected to radio frequency wire jumper port 74-2 by radio frequency wire jumper 80 again, being about to radio frequency wire jumper port 81-1 links to each other with radio frequency wire jumper port 74-5, radio frequency wire jumper port 81-2 is connected with radio frequency wire jumper port 74-2, two-in-one circuit 72-2 will be from two-in-one circuit 72-1 next signal and the next synthetic back output of the signal radio frequency backboard 70 of 74-2, enter duplexer 50-3 by LPA40-3 and carry out filtering, be transmitted in the air through antenna 60-3 then.
If base station configuration is 6 sectors, 2 carrier waves, transceiver 10-5 and 10-6 belong to a sector, and transceiver 10-7 and 10-8 belong to another sector.
The upward signal of one of them sector, after antenna 60-3 reception, entering LNA30-3 through duplexer 50-3 amplifies, enter radio frequency backboard 70 then, shunt on one-to-two circuit 71-1 and the radio frequency wire jumper port 74-1 behind the signal process one-to-two circuit 71-2,74-1 directly connects matched load with radio frequency wire jumper port, is directly connected to transceiver 10-5 after the signal one-to-two shunt of 71-1,10-6 has realized on signal allocation to two transceiver of a sector like this.
The upward signal of another sector, after antenna 60-4 reception, entering LNA30-4 through duplexer 50-4 amplifies, enter radio frequency backboard 70 then, be connected on the radio frequency wire jumper port 74-4 behind the signal process attenuator 73-1, signal to radio frequency wire jumper port 74-4 is connected to radio frequency wire jumper port 74-3 by radio frequency wire jumper 80, being about to radio frequency wire jumper port 81-1 links to each other with radio frequency wire jumper port 74-3, radio frequency wire jumper port 80-2 is connected with radio frequency wire jumper port 74-4, this road signal is connected to transceiver 10-7 and 10-8 after dividing through one-to-two circuit 71-3 merit again, has realized like this on signal allocation to two transceiver of another sector.Need to prove, the signal of previous sector has passed through the processing of twice one-to-two circuit in the process from LNA to the transceiver, signal power losses is bigger, and the signal of this sector has only passed through the processing of an one-to-two circuit in the process from LNA to the transceiver, signal power losses is less, therefore need to increase an attenuator 73-1 signal is carried out power attenuation, so that make the signal power unanimity that each transceiver is received.
The transmission path of the downstream signal of one of them sector is as follows: transceiver 10-5, transmitting of 10-6 enters radio frequency backboard 70, after the two-in-one circuit 72-1 of process is synthetic, be transferred on the two-in-one circuit 72-2, directly connect matched load with radio frequency wire jumper port 74-2 port this moment, the output signal of two-in-one circuit 72-1 enters duplexer 50-3 by LPA40-3 and carries out filtering after closing the road through two-in-one circuit 72-2 again, is transmitted in the air through antenna 60-3 then.
The downstream signal transmission path of another sector is as follows: transceiver 10-5, transmitting of 10-6 enters radio frequency backboard 70, after process 72-3 is synthetic, be transferred on the radio frequency wire jumper port 74-5, signal to radio frequency wire jumper port 74-5 is connected to radio frequency wire jumper port 74-6 by radio frequency wire jumper 80, being about to radio frequency wire jumper port 81-1 links to each other with radio frequency wire jumper port 74-5, radio frequency wire jumper port 81-2 is connected with radio frequency wire jumper port 74-6, the signal of radio frequency wire jumper port 74-6 enters duplexer 50-4 by LPA40-4 again after by attenuator 73-2 and carries out filtering, is transmitted in the air through antenna 60-4 then.Need to prove, the signal of previous sector has passed through the processing of twice one-to-two circuit in the process from the transceiver to LPA, signal power losses is bigger, and the signal of this sector has only passed through the processing of an one-to-two circuit in the process from the transceiver to LPA, signal power losses is less, therefore need to increase an attenuator 73-2 signal is carried out power attenuation, so that make the signal power unanimity that each LPA receives.
For the purpose of simplifying the description, the system that 4 transceivers only have been described in specific embodiments of the invention connects, those of ordinary skill in the art are appreciated that according to same principle the radio frequency backboard being expanded when can realize that radio frequency frame full configuration is put the system of totally 12 transceivers connects and do not influence the spirit and scope of the invention.
Those of ordinary skill in the art are appreciated that can digital signal and radiofrequency signal back plate design altogether, in the scheme of using the present invention to propose aspect the processing of radiofrequency signal and the switching so that system is simpler.
Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (5)
1. a raio frequency back plate capable of realizing configuration switched is characterized in that, comprises radio frequency handover module and radio frequency wire jumper; Wherein
Described radio frequency handover module comprises a plurality of continuous mixers and splitter, and described radio frequency handover module also comprises radio frequency wire jumper port;
Described radio frequency wire jumper is used for connecting described radio frequency wire jumper port to realize the switching of different configurations.
2. raio frequency back plate capable of realizing configuration switched according to claim 1 is characterized in that, the described radio frequency handover module that is used to handle radiofrequency signal directly is connected with described radio frequency backboard by blind slotting technology.
3. raio frequency back plate capable of realizing configuration switched according to claim 1 is characterized in that, described radio frequency backboard also comprises attenuator, is used for making by deamplification power the power equalization of different branch, and described attenuator comprises described radio frequency wire jumper port.
4. raio frequency back plate capable of realizing configuration switched according to claim 3 is characterized in that, described radio frequency backboard is provided with described radio frequency wire jumper port to realize the switching of system configuration in the backboard front.
5. raio frequency back plate capable of realizing configuration switched according to claim 1 is characterized in that, described radio frequency backboard adopts digital signal and radiofrequency signal back plate design altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2003101193484A CN100407821C (en) | 2003-12-10 | 2003-12-10 | Raio frequency back plate capable of realizing configuration switched |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2003101193484A CN100407821C (en) | 2003-12-10 | 2003-12-10 | Raio frequency back plate capable of realizing configuration switched |
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| CN1627848A CN1627848A (en) | 2005-06-15 |
| CN100407821C true CN100407821C (en) | 2008-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2003101193484A Expired - Fee Related CN100407821C (en) | 2003-12-10 | 2003-12-10 | Raio frequency back plate capable of realizing configuration switched |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100495830C (en) | 2007-06-06 | 2009-06-03 | 华为技术有限公司 | A single-board hardware device and RF blind insertion connection device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5991864A (en) * | 1993-04-27 | 1999-11-23 | Intermec Ip Corp. | Power connectors, antenna connectors and telephone line connectors for computer devices utilizing radio and modem cards |
| CN1390068A (en) * | 2001-06-01 | 2003-01-08 | 华为技术有限公司 | Automatic guide for blind insertion of RF modules |
| CN1399845A (en) * | 1999-11-25 | 2003-02-26 | 匡特股份公司 | System-side connecting module and distributor for telecommunications technology |
| CN2588709Y (en) * | 2002-10-10 | 2003-11-26 | 华为技术有限公司 | Communication cabledistribution frame |
-
2003
- 2003-12-10 CN CN2003101193484A patent/CN100407821C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5991864A (en) * | 1993-04-27 | 1999-11-23 | Intermec Ip Corp. | Power connectors, antenna connectors and telephone line connectors for computer devices utilizing radio and modem cards |
| CN1399845A (en) * | 1999-11-25 | 2003-02-26 | 匡特股份公司 | System-side connecting module and distributor for telecommunications technology |
| CN1390068A (en) * | 2001-06-01 | 2003-01-08 | 华为技术有限公司 | Automatic guide for blind insertion of RF modules |
| CN2588709Y (en) * | 2002-10-10 | 2003-11-26 | 华为技术有限公司 | Communication cabledistribution frame |
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| CN1627848A (en) | 2005-06-15 |
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Granted publication date: 20080730 Termination date: 20191210 |