CN1756104A - Redundancy backup system and RF switching device for base station forward link - Google Patents
Redundancy backup system and RF switching device for base station forward link Download PDFInfo
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- CN1756104A CN1756104A CN 200410064877 CN200410064877A CN1756104A CN 1756104 A CN1756104 A CN 1756104A CN 200410064877 CN200410064877 CN 200410064877 CN 200410064877 A CN200410064877 A CN 200410064877A CN 1756104 A CN1756104 A CN 1756104A
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Abstract
The invention relates to a redundant back-up system and a radio-frequency shifter of base station forward chain circuit. Wherein, the back-up system has a digital shifting switch on the front end of n groups of small signal radio-frequency emitter circuit, its upstream digital-middle frequency signal transformation circuit and the back-up circuit, while adds a radio-frequency shifting switch on their back end. And the radio-frequency shifter is formed by three sub-cards. The inventive system processes the redundant back-up on the digital circuit, the digital-analog mixing circuit and the radio-frequency emitter circuit of base station forward chain circuit, and the said redundant back-up system can be singly switched without affected by the switching condition of redundant back-up system of reverse chain circuit, to make the system with higher reliability. The back-up shifter can support the programming for a plurality of capacities and the carrier wave sectors of base station, to flexibly select variable back-up programs without changing other parts of base station and the interface and connecting line between them.
Description
Technical field
The present invention relates to a kind of redundancy backup of radio communication base station forward link, especially the forward link redundancy backup of multicarrier multi-sector base stations.
Background technology
Rapid growth along with the user of commercial wireless communication systems such as GSM, CDMA, and the becoming increasingly abundant of radio communication service, capacity requirement to the wireless base station is more and more higher, wireless planning develops to the direction of multicarrier, many sectors, correspondingly, the integrated level of signal processing circuit is also more and more higher in the base station, and the carrier frequency number that each module is supported is more and more, traffic carrying capacity is increasing.Therefore, the inefficacy of individual module also may cause very big influence to service.In this case, the reliability of raising individual module and whole system seems particularly important.
Improve a kind of method of system reliability and set up a cover redundancy backup system exactly, the work of automatically it being born when certain module lost efficacy changes by spare module to be born.
The prior art in this field mainly is conceived to the redundancy backup of small-power radio-frequency transmissions circuit and the redundancy backup of high-power RF radiating circuit.Because these two kinds of circuit have difference, so their backup mode and switching device shifter are also inequality.
Patent about the redundancy backup of small-power radio-frequency transmissions circuit comprises that U.S. Patent number is 6,002,928, name is called the patent of " Switching apparatus and method for transceiver of cellular base station incode division multiple access mobile telecommunication system ", and the patent No. is 5,666,646, name is called the patent of " Radio frequency (RF) converter system with distributedprotection switching and method therefor ".The former utilizes three radio-frequency (RF) switch to switch for transceiver (transceiver) provides backup, and two radio-frequency (RF) switch of The latter are that up-converter circuit (up-converter) provides backup to switch.
Patent about the redundancy backup of high-power RF radiating circuit comprises: Chinese patent application number is 03110663.3, name is called " the linear power amplifier frame of mobile communication base station and the type changing method thereof ", U.S. Patent number is 6,292,677, name is called " Power delivery system and method for controllingthe power delivery system for use in a radio frequency system ", the patent No. is 4,070,637, name is called " Redundant microwave configuration ", the patent No. is 4,644,301, name is called " Redundancy system and switching network " and the patent No. is 4,061,989, name is called " Redundancy switching system ".Preceding four patents all are respectively to use one group of switching device shifter that it is backed up switching before and after radio-frequency power amplifier, and difference each other is the formation of switching device shifter, the configuration of power amplifier, the difference of backup capabilities etc.Last patent only uses one group of switching device shifter to realize the backup handoff functionality in a side of power amplifier.
There is following problem in above-mentioned prior art:
1, can not compatible multiple backup mode for flexible selection.
2, only one of them carries out redundancy backup to transceiver, up-converter circuit and radio-frequency power amplifier, also digital circuit, Digital Analog Hybrid Circuits is not backed up, and can not improve the reliability of system all sidedly.
When 3, transceiver being carried out redundancy backup, forward direction transtation mission circuit and reverse receiving circuit are integrated in the same transceiver, can only enable simultaneously or forbid simultaneously, lack flexibility and reliability.
4, implementing device for switching all is analogue means, does not realize the more flexibility of strong functions and Geng Gao by digital switching device shifter.
Summary of the invention
The technical problem to be solved in the present invention is, at the defective of prior art, proposes a kind of standby system of new base station forward link, and it carries out redundancy backup to digital circuit, Digital Analog Hybrid Circuits and radio-frequency transmissions circuit, can improve the reliability of system.
The present invention proposes a kind of RF switching device that is used for the standby system of base station forward link, can select multiple backup mode on demand and need not to change the digital interface and the radio frequency (RF) cable of base station.
The redundancy backup system of the base station forward link among the present invention, at the digital signal of n group small-signal radio-frequency transmissions circuit and upstream thereof digital switch of preceding termination, connect a radio frequency diverter switch in its back-end to the digital signal of intermediate-freuqncy signal change-over circuit and one group of standby small-signal radio-frequency transmissions circuit and upstream thereof to the intermediate-freuqncy signal change-over circuit; When set of circuits breaks down, described digital switch and radio frequency diverter switch are carried out handover operation together, originally the data bit flow that was sent to the faulty circuit group is transferred to stand-by circuit, and replaces the output of original faulty circuit to be sent to late-class circuit with its output.Digital signal comprises digital control circuit and modulator (can be numeral or simulation) to the intermediate-freuqncy signal change-over circuit.Digital signal can also contain digital to analog converter, filter (numeral or simulation) and upconverter (numeral or simulate) to the intermediate-freuqncy signal change-over circuit.
In such scheme, in every group of circuit, between small-signal radio-frequency transmissions circuit and described radio frequency diverter switch, radio-frequency power amplifier can also be arranged.
Digital signal among the present invention to intermediate-freuqncy signal change-over circuit and small-signal radio-frequency transmissions circuit can be placed on respectively in the separate unit of module independently or same module, can enable separately and forbidding and be not subjected to the influence of receiver circuit operating state separately.
In such scheme, can also comprise n radio-frequency power amplifier, a standby radio-frequency power amplifier and second, third two radio frequency diverter switches; The described second radio frequency diverter switch connects with the radio frequency diverter switch that is connected small-signal radio-frequency transmissions circuit; Digital signal to intermediate-freuqncy signal change-over circuit, a small-signal radio-frequency transmissions circuit and a radio-frequency power amplifier transmits for a RF front-end module provides together.
The RF switching device of the standby system that is used for base station forward link among the present invention is made of three subcards, and each subcard can be a kind of in following three types:
(1) radio-frequency (RF) switch of n input port and n+1 output port;
(2) radio-frequency (RF) switch of n+1 input port and n output port;
(3) n+1 input port and n+1 output port of the direct-connected cable connection of n+1 root.
With respect to prior art; system of the present invention is to the digital circuit in the base station forward link; Digital Analog Hybrid Circuits and radio-frequency transmissions circuit have all carried out redundancy backup; and digital signal wherein to intermediate-freuqncy signal change-over circuit and small-signal radio-frequency transmissions circuit can be enabled the influence (they can be placed in the module that is independent of outside the receiver) that is not subjected to the receiver circuit operating state with forbidding separately separately; simultaneously the redundancy backup system of forward link can switch separately and not be subjected to the influence (can adopt independently handover control system) of switching state of the redundancy backup system of reverse link; these measures system that makes has higher reliability, has reduced to a greater degree because the service disruption that the fault of each several part circuit causes.
The backup switching device shifter that the present invention proposes can be supported multiple base station capacity and the planning of carrier wave sector, can also select various backup scenarios easily and flexibly, and need not change the other parts of base station and interface between them and line.Make the planning again of the upgrading of base station and carrier wave sector be more prone to like this, more level and smooth.
Description of drawings
Fig. 1 is the structure chart of three kinds of base station forward link standby systems in the prior art;
Fig. 2 is the structure chart of a kind of embodiment of base station forward link standby system of the present invention;
Fig. 3 is the structure chart of the another embodiment of base station forward link standby system of the present invention;
Fig. 4 is the structure chart of the third embodiment of base station forward link standby system of the present invention;
Fig. 5 is the structure chart of RF switching device of the present invention and subcard thereof;
Fig. 6 is the system construction drawing when utilizing the switching device shifter of Fig. 5 to realize the backup scenario of Fig. 3;
Fig. 7 is the system construction drawing when utilizing the switching device shifter of Fig. 5 to realize the backup scenario of Fig. 4;
Fig. 8 is the switching device shifter that adopts Fig. 5, but the system construction drawing when only power amplifier being backed up;
Fig. 9 is the switching device shifter that adopts Fig. 5, but the system construction drawing when only digital circuit and small-power radio-frequency transmissions circuit being backed up;
Figure 10 is the switching device shifter that adopts Fig. 5, but the system construction drawing when not providing backup functionality;
Figure 11 is two kinds of cut-away views of radio frequency diverter switch among the present invention (RF Switch).
Figure 12 is a kind of composition structure chart of the medium and small signal RF radiating circuit of the present invention (TX);
Figure 13 is the flow chart of handover control system among the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done detailed explanation.
(A) among Fig. 1, (B) are depicted as that two kinds of prior aries are respectively radio-frequency power amplifier 103～107 and radiofrequency signal upconverter 112～116 provides backup protection, and the back mechanism that is adopted is basic identical.A radio frequency diverter switch 101,102 is respectively arranged before and after radio-frequency power amplifier, when a radio-frequency power amplifier breaks down therein, by controlling the switching of two diverter switches, select standby radio-frequency power amplifier 107 to replace out of order radio-frequency power amplifier, thereby avoid the interruption of serving.Similarly, in radiofrequency signal upconverter 112～116 front and back a radio frequency diverter switch 110,111 is arranged respectively, when a radiofrequency signal upconverter breaks down therein, by controlling the switching of two diverter switches, select standby radiofrequency signal upconverter 116 to replace out of order radiofrequency signal upconverter, thereby avoid the interruption of serving.It is that transceiver (Transceiver) 123～127 provides backup protection that (C) among Fig. 1 is depicted as prior art; there are three radio frequency diverter switches 120,121 to link to each other with above-mentioned transceiver with 122; when a transceiver breaks down therein (may be that forward emitted circuit wherein, reverse receiving circuit or other built-up circuit break down); by controlling the switching of three diverter switches; select standby transceiver 127 to replace out of order transceiver, thereby avoid the interruption of serving.
Figure 2 shows that a kind of embodiment of base station forward link standby system of the present invention.Among the figure, the circuit that redundancy backup system is protected comprises " digital signal is to the intermediate-freuqncy signal change-over circuit " 203～207 of small-signal radio-frequency transmissions circuit 208～212 and upstream thereof.In " digital signal is to the intermediate-freuqncy signal change-over circuit " except containing digital control circuit, also contain modulator (can be numeral or simulation), also may contain circuit such as digital to analog converter, filter (numeral or simulation) and upconverter (numeral or simulate).The such circuit of n group is arranged in the system, also have one group of stand-by circuit in addition.When set of circuits breaks down, digital switch 201 and radio frequency diverter switch 202 are carried out handover operation together, originally the data bit flow that was sent to faulty circuit is transferred to stand-by circuit, and replaces the output of original faulty circuit to be sent to late-class circuit with its output.Functions such as the demultiplexing of digital switch 201 realization data bit flows, forwarding can realize with programmable logic device or other digital device.
Fig. 3 is the another kind of scheme of base station forward link standby system of the present invention; the difference of it and scheme shown in Figure 2 is: the circuit that redundancy backup system is protected also comprises radio-frequency power amplifier 313～317 except " digital signal is to the intermediate-freuqncy signal change-over circuit " 303～307 of small-signal radio-frequency transmissions circuit 308～312 and upstream thereof.
Fig. 4 is the third scheme of base station forward link standby system of the present invention, the standby system structure chart that one of standby system of the present invention promptly shown in Figure 2 and prior art shown in Figure 1 combine and constituted.One " digital signal is to the intermediate-freuqncy signal change-over circuit " 405, small-signal radio-frequency transmissions circuit 410 and a power amplifier 415 transmit for a RF front-end module 420 provides together, their correspondences a transmit antennas, and they have constituted a forward link of base station together.Provide the n bar such forward link in this system altogether, also have a standby radio-frequency power amplifier 419 in addition, and other circuit in the link has also had one group of stand-by circuit 409,414.But other circuit in radio-frequency power amplifier and the link does not directly couple together, and links together by two radio frequency diverter switches 402,403 between them.These two radio frequency diverter switches make the stand-by circuit of standby radio-frequency power amplifier and upstream to be activated respectively, and can be used for replacing faulty circuit on the different links respectively, and unlike scheme shown in Figure 3, must enable and be used for to substitute same faulty circuit simultaneously.These characteristics make this system have the reliability higher than Fig. 3.
Fig. 5 is a kind of RF switching device of base station forward link backup switching and structure chart of subcard thereof of being used for that the present invention proposes.This device 501 is modules that are made of three subcards 502～504, and each subcard can have three type 505,506,507.If the inside implementation of radio frequency diverter switch makes its input and output can exchange use, so above-mentioned three kinds of subcards can reduce into two kinds: 507 and 505 (perhaps 506).Suitable process structure design makes the subcard installation site that the subcard of arbitrary kind can be installed.By the subcard of suitable kind is installed in module, can in system, realize comprising the multiple backup functionality of Fig. 2～scheme shown in Figure 4, also can in the system that does not possess backup functionality, use, and the line between the external interface of module and it and other module remains unchanged.So just can provide the various configurations that adapts with different demands mode, both help producing in batches, also help the smooth upgrade of base station capacity and function with a kind of unified base station frame.The specific implementation method is described in the accompanying drawing of back.
Fig. 6 is exactly the system construction drawing when adopting the switching device shifter of Fig. 5 to realize the backup scenario of Fig. 3, and wherein the subcard of " direct-connected cable " type is installed in 603 and 604 positions, and the subcard of " radio frequency diverter switch " type is installed in 605 positions.
Fig. 7 is the system construction drawing when adopting the switching device shifter of Fig. 5 to realize the backup scenario of Fig. 4, and wherein the subcard of " radio frequency diverter switch " type is all installed in 703,704 and 705 positions.
Fig. 8 is the system construction drawing when adopting the switching device shifter of Fig. 5 to realize prior art, and wherein the subcard of " direct-connected cable " type is installed in 803 positions, and the subcard of " radio frequency diverter switch " type is installed in 804 and 805 positions.Also the subcard of " direct-connected cable " type can be installed in 804 positions, the subcard of " radio frequency diverter switch " type is installed in 803 and 805 positions, realizes identical functions.
Fig. 9 is the system construction drawing when adopting the switching device shifter of Fig. 5 to realize the backup scenario of Fig. 2, and wherein the subcard of " radio frequency diverter switch " type is installed in 903 positions, and the subcard of " direct-connected cable " type is installed in 904 and 905 positions.Also the subcard of " radio frequency diverter switch " type can be installed in 904 positions, the subcard of " direct-connected cable " type is installed in 903 and 905 positions, realizes identical functions.
Figure 10 is the structure chart when adopting the switching device shifter of Fig. 5 to realize the system of no backup functionality, and wherein the subcard of " direct-connected cable " type is all installed in 1003,1004 and 1005 positions.
Figure 11 is that structure is formed in the possible inside of two kinds of radio frequency diverter switch.1101～1111 can be that radio-frequency relay (RF Relay) or other can be realized the device of similar functions.In addition, the radio frequency diverter switch can also be by other the structure of forming, for example ring of being made up of the relay of Transfer type.
Figure 12 is a kind of possible composition structure chart of forward link small-signal radio-frequency transmissions circuit (TX), comprising filter, amplifier and upconverter.
Figure 13 is the control flow chart that backup is switched.As scheme shown in the A, in the running of base station, when link occurs fault, the state information that the supervisory control system analysis is collected from each unit of link, judge whether link is working properly, if it is undesired to work, tracing trouble type then, locate the concrete unit that breaks down, and send warning information to Operation ﹠ Maintenance System.Simultaneously, emergency system judges whether to also have available standby resources, if having, then controls switching device shifters at different levels and switches to proper state to continue to provide normal service; If no, then send more serious warning information to Operation ﹠ Maintenance System.As scheme shown in the B, after the trouble unit reparation and finishing installation, system can prompting after self check finishes on-the-spot and consistency operation personnel switch from stand-by unit and get back to normal cell and get on, can discharge standby resources like this, in order to use when breaking down next time.
Claims (9)
1, a kind of redundancy backup system of base station forward link, at the digital signal of n group small-signal radio-frequency transmissions circuit (208～211) and upstream thereof a digital switch of preceding termination (201), connect a radio frequency diverter switch (202) in its back-end to the digital signal of intermediate-freuqncy signal change-over circuit (203～206) and one group of standby small-signal radio-frequency transmissions circuit (212) and upstream thereof to intermediate-freuqncy signal change-over circuit (207); When set of circuits breaks down, described digital switch (201) and radio frequency diverter switch (202) are carried out handover operation together, originally the data bit flow that was sent to the faulty circuit group is transferred to stand-by circuit, and replaces the output of original faulty circuit to be sent to late-class circuit with its output.
2, the redundancy backup system of the described base station forward link of claim 1 is characterized in that, described digital switch is realized with digital device.
3, the redundancy backup system of the described base station forward link of claim 2 is characterized in that, described digital switch is realized with programmable logic device.
4, the redundancy backup system of the described base station forward link of claim 1 is characterized in that, described digital signal to intermediate-freuqncy signal change-over circuit and small-signal radio-frequency transmissions circuit is placed on respectively in the separate unit of module independently or same module.
5, the redundancy backup system of the described base station forward link of claim 1 is characterized in that, described digital signal comprises digital control circuit and modulator to the intermediate-freuqncy signal change-over circuit.
6, the redundancy backup system of the described base station forward link of claim 5 is characterized in that, described digital signal also contains digital to analog converter, filter and upconverter to the intermediate-freuqncy signal change-over circuit.
7, the redundancy backup system of the described base station forward link of claim 1 is characterized in that, also has radio-frequency power amplifier (313～317) in every group of circuit between small-signal radio-frequency transmissions circuit and described radio frequency diverter switch.
8, the redundancy backup system of the described base station forward link of claim 1, it is characterized in that, also comprise n radio-frequency power amplifier (415～418), a standby radio-frequency power amplifier (419) and second, third two radio frequency diverter switches (403,404); The described second radio frequency diverter switch connects with the radio frequency diverter switch that is connected small-signal radio-frequency transmissions circuit; Described the 3rd radio frequency diverter switch connects radio-frequency power amplifier and RF front-end module; Digital signal to intermediate-freuqncy signal change-over circuit, small-signal radio-frequency transmissions circuit and radio-frequency power amplifier is that a RF front-end module (420) provides and transmits together.
9, a kind of RF switching device that is used for the standby system of base station forward link is characterized in that, is made of three subcards (502～504), and each subcard can be a kind of in following three types:
(1) radio-frequency (RF) switch of n input port and n+1 output port;
(2) radio-frequency (RF) switch of n+1 input port and n output port;
(3) n+1 input port and n+1 output port of the direct-connected cable connection of n+1 root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100648773A CN100433574C (en) | 2004-09-30 | 2004-09-30 | Redundancy backup system and RF switching device for base station forward link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100648773A CN100433574C (en) | 2004-09-30 | 2004-09-30 | Redundancy backup system and RF switching device for base station forward link |
Publications (2)
| Publication Number | Publication Date |
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| CN1756104A true CN1756104A (en) | 2006-04-05 |
| CN100433574C CN100433574C (en) | 2008-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100648773A Expired - Fee Related CN100433574C (en) | 2004-09-30 | 2004-09-30 | Redundancy backup system and RF switching device for base station forward link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009089765A1 (en) * | 2008-01-02 | 2009-07-23 | Huawei Technologies Co., Ltd. | Method for sharing base band resource, communication system and equipment |
| CN102195693A (en) * | 2010-03-01 | 2011-09-21 | 株式会社东芝 | Wireless base station device |
| CN107086874A (en) * | 2016-02-15 | 2017-08-22 | 株式会社东芝 | Transmission system |
| CN111147087A (en) * | 2019-12-23 | 2020-05-12 | 京信通信系统（中国）有限公司 | Intermediate frequency backup unit, system and method |
| CN113960515A (en) * | 2021-10-27 | 2022-01-21 | 上海电气(集团)总公司智惠医疗装备分公司 | Magnetic resonance electronic and electrical system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848102B (en) * | 2009-03-24 | 2011-12-28 | 华为技术有限公司 | Method and device for establishing active/standby intermediate frequency cell protection |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4825448A (en) * | 1986-08-07 | 1989-04-25 | International Mobile Machines Corporation | Subscriber unit for wireless digital telephone system |
| US5666646A (en) * | 1995-04-10 | 1997-09-09 | Comtech | Radio frequency (RF) converter system with distributed protection switching and method therefor |
| KR0168805B1 (en) * | 1996-03-06 | 1999-02-01 | 김광호 | Apparatus and method for transceiver conversion |
| CN100359818C (en) * | 2002-12-30 | 2008-01-02 | 中兴通讯股份有限公司 | Device and method for realizing backup of single plate |
| CN1266961C (en) * | 2003-02-20 | 2006-07-26 | 华为技术有限公司 | A method for backup of power amplifier and equipment thereof |
-
2004
- 2004-09-30 CN CNB2004100648773A patent/CN100433574C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009089765A1 (en) * | 2008-01-02 | 2009-07-23 | Huawei Technologies Co., Ltd. | Method for sharing base band resource, communication system and equipment |
| CN102195693A (en) * | 2010-03-01 | 2011-09-21 | 株式会社东芝 | Wireless base station device |
| CN107086874A (en) * | 2016-02-15 | 2017-08-22 | 株式会社东芝 | Transmission system |
| CN107086874B (en) * | 2016-02-15 | 2019-07-23 | 株式会社东芝 | Transmission system |
| CN111147087A (en) * | 2019-12-23 | 2020-05-12 | 京信通信系统（中国）有限公司 | Intermediate frequency backup unit, system and method |
| CN113960515A (en) * | 2021-10-27 | 2022-01-21 | 上海电气(集团)总公司智惠医疗装备分公司 | Magnetic resonance electronic and electrical system |
| CN113960515B (en) * | 2021-10-27 | 2024-02-09 | 上海电气(集团)总公司智惠医疗装备分公司 | Magnetic resonance electronic and electric system |
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|---|---|
| CN100433574C (en) | 2008-11-12 |
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