CN1885750B - Far-end RF module and its method for transmitting signal - Google Patents
Far-end RF module and its method for transmitting signal Download PDFInfo
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- CN1885750B CN1885750B CN 200510079609 CN200510079609A CN1885750B CN 1885750 B CN1885750 B CN 1885750B CN 200510079609 CN200510079609 CN 200510079609 CN 200510079609 A CN200510079609 A CN 200510079609A CN 1885750 B CN1885750 B CN 1885750B
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Abstract
The disclosed remote RF module comprises: a local signal process part (110), two serial-to-parallel conversion and transmission devices (1202a/b), two optical modules (1201a/b), and a control module (400) to detect fault of (110) and send directly signal from (1201a/b) to another (1201b/a) once (110) failure. This invention ensures continuity of signal transmission.
Description
Technical field
The present invention relates to the radio-frequency technique field in the communication system, relate in particular to the method for a kind of far-end RF module and its transmission signals.
Background technology
Along with the development of wireless radio-frequency, the development of base station is tending towards Base-Band Processing is separated with radio frequency part with control section, thereby the radio frequency part of base station is zoomed out.In the base station, Base-Band Processing and control section are commonly called radio equipment controller (REC), and radio frequency part is become wireless device (RE), and the wireless device that radio frequency part forms after zooming out is called as far-end RF module (RRU).
In the base station, single REC can control a plurality of RRU, forms star-like, chain, tree type or topological syndeton such as ring-like realizes by REC and RRU.In these syndetons, the RRU that mediates need communicate with two equipment that both sides are connected respectively, so the composition structure of RRU as shown in Figure 1.RRU shown in Figure 1 comprises local signal processing section 110 and interface section 120, interface section 120 is mainly used in RRU and communicates with other RRU or with REC and be connected, and comprises that two are respectively string and conversion transmission apparatus 1202a, the 1202b that optical module carries out conversion of signals as optical module 1201a, the 1201b of input/output interface and two.
In the composition structure of above-mentioned RRU, RRU communicates respectively by the equipment that two optical modules just can be connected with both sides.For example, in Fig. 1, the light signal that the equipment that links to each other with optical module 1201a among the RRU sends over, be converted to the signal of telecommunication of serial by optical module 1201a after, be converted to that local signal processing section 110 can be handled and horizontal electrical signal through string and conversion transmission apparatus 1202a again, be input to local signal processing section 110 then and handle; Local signal processing section 110 is handled that the back produces and horizontal electrical signal, if the signal that the equipment that is connected to optical module 1201a returns then is converted to light signal by string and conversion transmission apparatus 1202a with optical module 1201a and outputs to the equipment that links to each other with optical module 1201a among the RRU; If the equipment that is connected to optical module 1201b continues the signal of transmission, then output to the equipment that links to each other with optical module 1201b among the RRU by string and conversion transmission apparatus 1202b with after optical module 1201b is converted to light signal.
In the topological syndeton of a plurality of RRU is arranged, the fault of RRU node can cause by this RRU node signal interruptions in transmissions, thereby follow-up RRU node is impacted, make the RRU node that does not break down also can't communicate with REC or other RRU nodes.For example, in chain topology syndeton as shown in Figure 2, when in second RRU node 202 break down in the local signal processing section, RRU node 202 just can't be handled the signal that is input to wherein, can not be to other apparatus output signals, thereby caused follow- up RRU node 203 and 204 all to obtain signal, and signal can't be transferred to REC200 or RRU node 201 by RRU node 202 less than 201 outputs of REC200 or RRU node.Again for example, in ring topology syndeton shown in Figure 3, if RRU node 302 and RRU node 304 all break down, RRU node 303 all can not receive the signal of REC300 and RRU node 301 outputs from which side, also the signal that self produces can't be sent to REC300 or RRU node 301.
Summary of the invention
In view of this, the object of the present invention is to provide the method for a kind of far-end RF module and transmission signals thereof, can after RRU breaks down, guarantee can not interrupt through the signal transmission of this RRU.
First aspect for achieving the above object, the invention provides a kind of far-end RF module, this far-end RF module comprises: two optical modules (1201a, 1201b), two strings are also changed transmission apparatus (1202a, 1202b), each optical module links to each other with a string and conversion transmission apparatus, wherein
Optical module (1201a, 1201b) is used for sending to corresponding string and conversion transmission apparatus (1202a, 1202b) with receiving after light signal from the outside is converted to serial electric signal;
String and conversion transmission apparatus (1202a, 1202b), the serial electric signal that is used for receiving from optical module (1201a, 1201b) convert to and horizontal electrical signal after, send to local signal processing section (110), and after the parallel electrical signal conversion from local signal processing section (110) that will receive is serial electric signal, send to corresponding optical module (1201a, 1201b);
Local signal processing section (110), be used for the also horizontal electrical signal of string and conversion transmission apparatus (1202a, 1202b) input local signal processing section (110) is handled, and the also horizontal electrical signal after will handling sends to corresponding string and conversion transmission apparatus (1202a, 1202b);
Described far-end RF module also comprises:
Transmission control module (400), with each optical module (1201a, 1201b), local signal processing section (110) and string and conversion transmission apparatus (1202a, 1202b) link to each other, be used to transmit optical module (1201a, 1201b) with string and conversion transmission apparatus (1202a, serial electric signal 1202b), and detect local signal processing section (110) and whether break down, when detecting local signal processing section (110) when breaking down, with receive from each optical module (1201a, serial electric signal 1201b) directly sends to another optical module (1201b, 1201a).
Described local signal processing section (110) can be further used for: send the signal that is used for determining operate as normal to transmission control module (400) under normal condition;
Described transmission control module further comprises in (400):
Signal detection module (500), be used for receiving the signal that is used for determining operate as normal from local signal processing section (110), and according to whether receiving the described signal that is used for determining operate as normal, judge whether local signal processing section (110) breaks down, and after judging local signal processing section (110) and breaking down, send to the transmitting switch module and to be used to notify its out of order signal;
The transmitting switch module, after being used for notifying the far-end RF module out of order signal, the serial electric signal from each optical module (1201a, 1201b) that receives is directly sent to another optical module (1201b, 1201a) in being used to of receiving that signal detection module (500) sends.
Preferably, described transmitting switch module is: the mutual matrix of high speed signal (501).
Preferably, described signal detection module (500) is: watchdog module.
Second aspect for achieving the above object the invention provides a kind of method of far-end RF module transmission signals, and this method comprises:
Whether A, far-end RF module break down to self is detected;
B, far-end RF module detect self break down after, will directly send to another optical module from the signal of an optical module, by another optical module output.
Preferably, increase transmission control module in advance in far-end RF module, described steps A is:
The transmission control module that increases in advance in A1, the far-end RF module according to whether having received the signal that is used for determining operate as normal that the local signal processing section sends in the far-end RF module, judges whether far-end RF module breaks down;
Described step B is:
B1, described transmission control module will directly send to another optical module from the signal of an optical module, by another optical module output after detecting far-end RF module and breaking down.
Preferably, comprise signal detection module and transmitting switch module in the described transmission control module;
Whether described transmission control module breaks down to far-end RF module is detected, and specifically realizes by the signal detection module in the described transmission control module;
Among the then described step B1, signal detection module further comprises after detecting far-end RF module and breaking down: signal detection module sends to the transmitting switch module and is used to notify its out of order signal;
To directly send to another optical module from the signal of an optical module among the described step B1 is:
Described transmitting switch module will directly send to another optical module from the signal of an optical module after notifying its out of order signal in being used to of receiving that signal detection module sends.
Preferably, described transmitting switch module is: the mutual matrix of high speed signal.
Preferably, described signal detection module is: watchdog module.
By above technical scheme as can be seen, the present invention is by increasing transmission control module in RRU, whether the local signal processing section broken down detect, and after detecting the local signal processing section and breaking down, the serial electric signal from each optical module that receives is directly sent to another optical module, thereby realized after RRU breaks down, not can not interrupting of the signal transmission of this RRU of process, even make that certain RRU breaks down in various topological structures, the RRU of operate as normal also can obtain the signal that other equipment send by this RRU that breaks down;
In addition, among the RRU of the present invention, as the transmitting switch module, and adopt watchdog module that the mutual matrix of high speed signal is controlled, increased RRU of the present invention and guaranteed the signal transmission reliability of transmission continuously with the mutual matrix of high speed signal.
In the method for RRU transmission signals of the present invention, by RRU detect self break down after, the signal of an optical module input is directly exported by another optical module, guaranteed signal transmission continuity among the RRU, break down even realized RRU, also can not interrupt through the signal transmission of this RRU;
In addition, in the method for RRU transmission signals of the present invention, only transmit control signal to the signal detection module that increases in normal operation by the local signal processing section, signal detection module is not after receiving control signal, promptly detecting RRU breaks down, thereby the control transmission switch module is exported the signal of an optical module input by another optical module, has increased RRU of the present invention and has guaranteed the signal transmission reliability of transmission continuously.
Description of drawings
Fig. 1 is the composition structure chart of RRU in the prior art;
Fig. 2 is the chain topology johning knot composition that a plurality of RRU are arranged;
Fig. 3 is the ring topology johning knot composition that a plurality of RRU are arranged;
Fig. 4 is the composition structure chart of RRU in the invention;
Fig. 5 is the composition structure chart of RRU in the specific embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
Main thought of the present invention is that whether RRU breaks down to self is detected, when detect break down after, the signal of optical module input is directly exported by another optical module.
Among the present invention the part of RRU as shown in Figure 4, wherein, Fig. 4 a is RRU in normal operation, Fig. 4 b is the RRU under the malfunction.From Fig. 4 a and Fig. 4 b as can be seen, in the interface section of RRU, increased a transmission control module 400 among the present invention, under the normal operating conditions of RRU, shown in Fig. 4 a, local signal processing section 110 sends the signal that is used for determining operate as normal to transmission control module 400, after transmission control module 400 receives the signal that is used for definite operate as normal of local signal processing section 110 transmissions, judging the local signal processing section does not break down, promptly judging RRU does not break down, with receive from optical module 1201a, the serial electric signal of 1201b outputs to corresponding string and conversion transmission apparatus 1202a, among the 1202b, and will receive from string and conversion transmission apparatus 1202a, the serial electric signal of 1202b outputs to corresponding optical module 1201a, among the 1201b; After RRU breaks down, shown in Fig. 4 b, local signal processing section 110 can't send the signal that is used for determining operate as normal to transmission control module 400, then transmission control module is behind the signal that is used for definite operate as normal that does not receive 110 transmissions of local signal processing section, just judging RRU breaks down, so with optical module 1201a, the serial electric signal of 1201b input directly outputs to another optical module 1201b, 1201a, and by this another optical module 1201b, after 1201a will import wherein serial electric signal and be converted to light signal, outwards output to other equipment that are connected with this RRU.After fault had appearred in RRU, the signal that has just guaranteed to be input among this RRU by transmission control module 400 can continue transmission, can not interrupt.
Because after RRU breaks down, transmission control module is determined in being used for of not receiving that the local signal processing section sends to need it to change its operating state under the situation of signal of operate as normal, to the requirement of transmission control module than higher.So signalization detection module and transmitting switch module in transmission control module in the present invention.Wherein, signal detection module is determined according to local signal processing section being used for of sending whether the signal of operate as normal breaks down to RRU and is detected; Do not receive the signal that is used for determining operate as normal that the local signal processing section sends detecting, after judging RRU and breaking down, send to transmitting switch module 400 and to be used to notify its out of order signal.After transmitting switch module 400 receives and is used to notify its out of order signal, the serial electric signal from optical module 1201a, 1201b that receives is directly outputed to another optical module 1201b, 1201a, and be converted to behind the light signal to the outside output of RRU by optical module 1201b, 1201a.
Further specify the present invention below by specific embodiment.
In specific embodiments of the invention, RRU forms structure as shown in Figure 5, comprises local signal processing section 110, interface section 120 and signal detection module 500.Wherein, comprise optical module 1201a, 1201b in the interface section 120 again, string and conversion transmission apparatus 1202a, 1202b and the mutual matrix 501 of high speed signal.The mutual matrix 501 preferred SCAN90CP02 type cross matrixes of high speed signal.
In structure shown in Figure 5, under the RRU normal operating conditions, local signal processing section 110 transmits control signal to signal detection module 500, and is normal with notification signal detection module 500RRU work at present, and this control signal can be forms such as high and low level or pulse.Signal detection module 500 knows that local signal processing section 110 is working properly after receiving the high-level control signal of local signal processing section 110 transmissions, then sends the high level signal of notifying its current operate as normal to the mutual matrix 501 of high speed signal; After the mutual matrix 501 of high speed signal receives the high level signal of signal detection module 500 transmissions, optical module 1201a, 1201b are input to wherein serial electric signal output to corresponding string and conversion transmission apparatus 1202a, 1202b, and will go here and there and change transmission apparatus 1202a, 1202b and be input to optical module 1201a, the 1201b that serial electric signal wherein outputs to correspondence.
And after RRU breaks down, local signal processing section 110 is owing to break down, can't transmit control signal to signal detection module 500, signal detection module 500 is after the control signal that does not receive the transmission of local signal processing section, know that promptly local signal processing section 110 breaks down, then send the low level signal of notifying it to break down to the mutual matrix of high speed signal; After the mutual matrix 501 of high speed signal receives the low level signal that signal detection module 500 sends, optical module 1201a, 1201b are input to optical module 1201b, the 1201a. that wherein serial electric signal directly outputs to the RRU opposite side
In the present embodiment, the local signal processing section can also periodically transmit control signal to signal detection module 500 in normal operation.For example, signal detection module 500 adopts watchdog module to realize, the local signal processing section is exported reset signal with period T 1 to watchdog module in normal operation; After watchdog module receives reset signal, send the control signal of high level to the mutual matrix 501 of high speed signal, the mutual matrix 501 of high speed signal outputs among corresponding string and conversion transmission apparatus 1202a, the 1202b according to the signal of telecommunication of this control signal with optical module 1201a, 1201b input, and will go here and there and change the signal of telecommunication that transmission apparatus 1202a, 1202b import and output among optical module 1201a, the 1201b of correspondence; After software or hardware fault appear in RRU, RRU just can't be again to watchdog module output reset signal, when treating that the predefined time of overflowing greater than T1 arrives in the watchdog module, watchdog module produces spill over, and the low level control signal of triggering for generating sends to the mutual matrix 501 of high speed signal, and the mutual matrix of control high speed signal outputs to the signal of telecommunication of optical module 1201a, 1201b input among another optical module 1201b, the 1201a.
Signal detection module 500 is under the RRU normal operating conditions and after breaking down in the present embodiment, can exchange to the level height of the mutual matrix of high speed signal 501 outputs, i.e. output low level in normal operation is at the back output high level that breaks down; In addition, signal detection module 500 can also be pulse signal to the signal of mutual matrix 501 outputs of high speed signal.
The control signal of signal detection module 500 outputs specifically is a high level, low level or pulse signal, determine with the pin that is connected with this control signal according to the concrete model of selecting the mutual matrix 501 of high speed signal for use, as long as can control the mutual matrix 501 of high speed signal with optical module 1201a by control signal in normal operation, the signal of telecommunication of 1201b input outputs to corresponding string and conversion transmission apparatus 1202a, 1202b, and will go here and there and change transmission apparatus 1202a, the signal of telecommunication of 1202b input outputs to corresponding optical module 1201a, 1201b, and after RRU breaks down, can be with optical module 1201a, the signal of telecommunication of 1201b input directly outputs to another optical module 1201b, 1201a gets final product.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. far-end RF module comprises: two optical modules (1201a, 1201b), two strings are conversion transmission apparatus (1202a, 1202b) also, and each optical module links to each other with a string and conversion transmission apparatus, wherein,
Optical module (1201a, 1201b) is used for sending to corresponding string and conversion transmission apparatus (1202a, 1202b) with receiving after light signal from the outside is converted to serial electric signal;
String and conversion transmission apparatus (1202a, 1202b), the serial electric signal that is used for receiving from optical module (1201a, 1201b) convert to and horizontal electrical signal after, send to local signal processing section (110), and after the parallel electrical signal conversion from local signal processing section (110) that will receive is serial electric signal, send to corresponding optical module (1201a, 1201b);
Local signal processing section (110), be used for the also horizontal electrical signal of string and conversion transmission apparatus (1202a, 1202b) input local signal processing section (110) is handled, and the also horizontal electrical signal after will handling sends to corresponding string and conversion transmission apparatus (1202a, 1202b);
It is characterized in that described far-end RF module also comprises:
Transmission control module (400), with each optical module (1201a, 1201b), local signal processing section (110) and string and conversion transmission apparatus (1202a, 1202b) link to each other, be used to transmit optical module (1201a, 1201b) with string and conversion transmission apparatus (1202a, serial electric signal 1202b), and detect local signal processing section (110) and whether break down, when detecting local signal processing section (110) when breaking down, with receive from each optical module (1201a, serial electric signal 1201b) directly sends to another optical module (1201b, 1201a).
2. far-end RF module according to claim 1 is characterized in that, described local signal processing section (110) is further used for: send the signal that is used for determining operate as normal to transmission control module (400) under normal condition;
Described transmission control module further comprises in (400):
Signal detection module (500), be used for receiving the signal that is used for determining operate as normal from local signal processing section (110), and according to whether receiving the described signal that is used for determining operate as normal, judge whether local signal processing section (110) breaks down, and after judging local signal processing section (110) and breaking down, send to the transmitting switch module and to be used to notify its out of order signal;
The transmitting switch module, after being used for notifying the far-end RF module out of order signal, the serial electric signal from each optical module (1201a, 1201b) that receives is directly sent to another optical module (1201b, 1201a) in being used to of receiving that signal detection module (500) sends.
3. far-end RF module according to claim 2 is characterized in that, described transmitting switch module is: the mutual matrix of high speed signal (501).
4. according to claim 2 or 3 described far-end RF modules, it is characterized in that described signal detection module (500) is: watchdog module.
5. the method for a far-end RF module transmission signals is characterized in that, this method is applied in the far-end RF module as claimed in claim 1, and this method comprises:
Whether the transmission control module in A, the far-end RF module detects far-end RF module and breaks down;
B, transmission control module will directly send to another optical module from the signal of an optical module, by another optical module output after detecting far-end RF module and breaking down.
6. method according to claim 5 is characterized in that, described steps A is:
The transmission control module that increases in advance in A1, the far-end RF module according to whether having received the signal that is used for determining operate as normal that the local signal processing section sends in the far-end RF module, judges whether far-end RF module breaks down.
7. method according to claim 6 is characterized in that, comprises signal detection module and transmitting switch module in the described transmission control module;
Whether described transmission control module breaks down to far-end RF module is detected, and specifically realizes by the signal detection module in the described transmission control module;
Among the then described step B, signal detection module after detecting far-end RF module and breaking down,
Further comprise: signal detection module sends to the transmitting switch module and is used to notify its out of order signal;
To directly send to another optical module from the signal of an optical module among the described step B is:
Described transmitting switch module will directly send to another optical module from the signal of an optical module after notifying its out of order signal in being used to of receiving that signal detection module sends.
8. method according to claim 7 is characterized in that, described transmitting switch module is: the mutual matrix of high speed signal.
9. according to claim 7 or 8 described methods, it is characterized in that described signal detection module is: watchdog module.
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| CN101184280B (en) * | 2007-12-14 | 2012-02-08 | 中兴通讯股份有限公司 | Method of obtaining ID of radio frequency unit |
| CN101931465B (en) * | 2009-06-23 | 2013-07-03 | 京信通信***（中国）有限公司 | Light transmission bypass device of radio remote system |
| WO2012100372A1 (en) * | 2011-01-27 | 2012-08-02 | Telefonaktiebolaget L M Ericsson (Publ) | Method for rru bypass in wireless communication network and rru device |
| CN102957478B (en) * | 2011-08-19 | 2014-12-24 | 深圳光启高等理工研究院 | Radio frequency control lighting light source based visible light wireless communication system |
| CN103384204B (en) * | 2011-12-31 | 2016-03-30 | 华为数字技术（成都）有限公司 | The processing method of serial concurrent conversion circuit failure and device |
| CN105764081B (en) * | 2014-12-17 | 2020-03-13 | 中兴通讯股份有限公司 | Method, base station, network management system and system for detecting communication link |
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