CN103780302A - Control link switching method and device and RRU in double fiber transmission system - Google Patents
Control link switching method and device and RRU in double fiber transmission system Download PDFInfo
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Abstract
The invention discloses a control link switching method and device and an RRU in a double fiber transmission system so as to detect control link abnormities in the double fiber transmission system and trigger control link to switch, and guarantee normal operation of a communication system. The method comprises the following steps: a link state judgment module determines a current control link, wherein the current control link is a first communication link or a second communication link; the link state judgment module judges whether a warning signal output by a first warning acquisition module or a second warning acquisition module is received, wherein the first warning acquisition module outputs the warning signal when the first communication link is judged to be abnormal, and the second warning acquisition module outputs the warning signal when the second communication link is judged to be abnormal; and if the link state judgment module receives the warning signal of current control link abnormity, the link state judgment module triggers a link switching control module to carry out control link switching.
Description
Technical field
The present invention relates to mobile communication technology field, relate in particular to control link changing method, device and RRU equipment in a kind of two fine transmission system.
Background technology
Along with the communication technology especially development of the third generation communication technology, in fiber optic transmission system, simple optical fiber transmission rate also cannot meet system requirements, be limited by hardware transmission platform, as string and and to go here and there forward process capability improving slower etc., uses the transmission platform of two optical fiber while transmit communications signals to arise at the historic moment.In two fine transmission systems, overall system bandwidth is two fiber bandwidth sums, but conventionally only have an optical communication link for transmitting control and management information, this optical communication link becomes control link, in practical application, if control link occurs abnormal, as light signal is lost, reference clock signal is abnormal, link step-out etc., just there will be the uncontrolled situation of radio frequency remote equipment (RRU, Radio Remote Unit), now, will cause whole communication system to break down.
Therefore, how to occur, under abnormal conditions, carrying out abnormality detection in current control link, and the function of being transmitted control and management information is switched on another optical communication link, to guarantee the normal operation of communication system, become one of technical problem urgently to be resolved hurrily in prior art.
Summary of the invention
The embodiment of the present invention provides control link changing method, device and RRU equipment in a kind of two fine transmission system, abnormal and trigger control link and switch in order to detect in two fine transmission systems control link, guarantees that communication system normally moves.
The embodiment of the present invention provides control link changing method in a kind of two fine transmission system, comprising:
Link State judge module is determined current control link, and described current control link is the first communication link or second communication link;
Described Link State judge module judges whether to receive the alarm signal of the first alarm collection module or the output of the second alarm collection module, described the first alarm collection module is determined the first communication link outputting alarm signal when abnormal, and described the second alarm collection module is determined outputting alarm signal when second communication link is abnormal;
If when Link State judge module receives the abnormal alarm signal of current control link, trigger link switching controls module is carried out control link switching.
The embodiment of the present invention provides control link switching device shifter in a kind of two fine transmission system, comprising:
Link State judge module, for determining current control link, described current control link is the first communication link or second communication link; And judge whether to receive the alarm signal of the first alarm collection module or the output of the second alarm collection module; And in the time receiving the abnormal alarm signal of current control link, trigger link switching controls module is carried out control link switching.
The first alarm collection module, for determining that the first communication link is when abnormal, to described Link State judge module outputting alarm signal;
The second alarm collection module, in the time that definite second communication link is abnormal, to described Link State judge module outputting alarm signal;
Link switching control module, under the triggering at described Link State judge module, carries out control link switching.
The embodiment of the present invention provides a kind of RRU equipment, comprises control link switching device shifter in above-mentioned two fine transmission system.
Control link changing method in the two fine transmission system that the embodiment of the present invention provides, device and RRU equipment, Link State judge module is determined current control link, wherein, current control link can be the first communication link, also can be second communication link, and accuse and gather alert module monitors the first communication link by first, when the first communication link is when abnormal, the first alarm collection module is by the alarm signal of output the first communication link, the second alarm collection module monitoring second communication link, in the time that second communication link is abnormal, the second alarm collection module is by the alarm signal of output second communication link, like this, after Link State judge module is receiving the alarm signal of current control link, determine that current control link is abnormal, trigger link switching controls module is carried out to control link switching, owing to can detecting in time that by Link State judge module whether current control link is abnormal, and at current link during in abnormality, triggering control link is switched, thereby, avoid the communication system failure extremely causing due to control link, guarantee the normal operation of communication system.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in write specification, claims and accompanying drawing.
Accompanying drawing explanation
Fig. 1 is in the embodiment of the present invention, the structural representation of control link switching device shifter in two fine transmission systems;
Fig. 2 is in the embodiment of the present invention, the implementing procedure schematic diagram of control link changing method in two fine transmission systems.
Embodiment
Abnormal and trigger control link and switch in order to detect in two fiber communication systems control link, guarantee that communication system normally moves, the embodiment of the present invention provides control link changing method, device and RRU equipment in a kind of two fine transmission system.
According to new distribution type network coverage requirement, at present, in signal covering system, conventionally adopt baseband processing unit (BBU, Base Band Unit) coverage mode that is connected with RRU, require in higher system in bandwidth for transmission, the general double joint optical fiber that adopts connects BBU and RRU, and in the system of two kinds of networks with different systems signals of transmission, the BBU that often also adopts respectively simple optical fiber to connect different systems transmits control information separately.Therefore, for RRU, it need to can support two Optical Fiber Transmission simultaneously, and automatically adopts a communication link in good condition to transmit control and management information according to optic communication links state, to guarantee that RRU still can normally be controlled by BBU after a communication link is abnormal.Based on this, the embodiment of the present invention provides control link changing method in a kind of two fine transmission systems, by downlink communication link, monitors in real time the state of two communication links, and monitors BBU and whether send switching command, carries out accordingly the switching of control link.Wherein, the state of monitoring communications link in real time, comprise whether monitoring two communication links produce optical signal transceiver alarm signal, or clock reference signal abnormality alarming signal, or link step-out alarm signal, or the alarm signal such as link protocol control signal Pending The Entry Into Force alarm signal, once produce above-mentioned arbitrary alarm signal, to carry out the switching of control link, and use the communication link transmission control and management information after switching.Meanwhile, the current control link of mark, controls and provides status poll etc. for communications link signals switching, up link exchange transmission; In up link, according to the control link mark of mark, carry out the transmission of control and management information, if do not switch control link, send according to original control link, otherwise, need switching controls link to transmit control and management information.
Below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein is only for description and interpretation the present invention, be not intended to limit the present invention, and in the situation that not conflicting, the feature in embodiment and embodiment in the present invention can combine mutually.
As shown in Figure 1, the structural representation of control link switching device shifter in the two fine transmission system providing for the embodiment of the present invention, comprising:
Link State judge module 101, for determining current control link, this current control link is the first communication link or second communication link; And judge whether to receive the alarm signal that the first alarm collection module 102 or the second alarm collection module 103 are exported; And in the time receiving the abnormal alarm signal of current control link, trigger link switching controls module 104 is carried out control link switching;
When concrete enforcement, RRU is by two optical fiber whiles and same BBU, or different BBU connects, therefore, each root optical fiber forms a communication link, like this, has two communication links between RRU and BBU, suppose that the first communication link is the link between first optical fiber (being also called optical module 0) between RRU and BBU, second communication link is the link between second optical fiber (being also called optical module 1) between RRU and BBU.
When concrete enforcement, the alarm signal that the first alarm collection module 102 and the second alarm collection module 103 are exported can be, but not limited to comprise clock reference signal abnormality alarming signal, or optical signal transceiver alarm signal, or link step-out alarm signal, or link protocol control signal Pending The Entry Into Force alarm signal.
The first alarm collection module 102, for determining that the first communication link is when abnormal, to Link State judge module 101 outputting alarm signals;
When concrete enforcement, the first alarm collection module 102 is connected with optical module 0 by Serdes0 module, Serdes0 module is gone here and there and changes for realizing in down link, revert to parallel data by serial bit stream, in the time that Serdes0 module detects that abnormal or the first communication link of the first communication link clock reference signal exists optical signal transceiver alarm, will be to the first alarm collection module 102 output clock reference signal abnormality alarming signal or optical signal transceiver alarm signals, the first alarm collection module 102 is after receiving clock reference signal abnormality alarming signal or optical signal transceiver alarm signal, determine that the first communication link clock reference signal is abnormal or have optical signal transceiver alarm, clock reference abnormality alarming signal or the optical signal transceiver alarm signal of the first communication link will be exported to Link State judge module 101, simultaneously, between BBU and RRU, pass through the first communication link timing transmitting synchronous code, determine according to this synchronous code whether the first communication link link step-out occurs, in the time determining generation link step-out, will be to the first alarm collection module 102 output link step-out alarm signals, the first alarm collection module 102, after receiving link step-out alarm signal, is determined the first communication link step-out, will be to Link State judge module 101 output link step-out alarm signals.In the time that the first alarm collection signal 102 collects above-mentioned arbitrary alarm signal, will determine that the first communication link is abnormal, and to Link State judge module 101 outputting alarm signals.
The second alarm collection module 103, in the time that definite second communication link is abnormal, to Link State judge module 101 outputting alarm signals;
When concrete enforcement, the second alarm collection module 103 is connected with optical module 1 by Serdes1 module, the second alarm collection module 103 gathers second communication chain circuit alarming signal principle and the first alarm collection module 102, and to gather the first communication link alarm signal principle identical, repeats no more here.
Link switching control module 104, under the triggering at Link State judge module 101, carries out control link switching.
Concrete, if current control link is the first communication link, and after Link State judge module 101 receives the alarm signal that the first alarm collection module 102 exports, to enable to link switching control module 104 output switchings, trigger it control link is switched to second communication link, meanwhile, the current control link of link switching control module 104 notify status latch module 105 mark is designated 1; Or Link State judge module 101 is determined when current non-control link (second communication link) parses the control link hand off signaling of appointing with BBU, also trigger link switching controls module 104 is carried out to control link switching.After switching, the data of second communication link are directly transferred to control information extraction module 106 by down link, wherein, control information extraction module 106 is mainly for down link, extract the control and management information of control link output by link switching control module 104, according to the form of appointing with external treatment module or chip, carry out certain Data Analysis and conversion, be transported on external treatment module or chip; The data that up link is collected control information collection module 107 send on second communication link, wherein, control information collection module 107 is mainly for up link, according to the form of appointing with external treatment module or chip, receive data and carry out certain data packing and conversion, send in control link by link switching control module 104.
If current control link is second communication link, and after Link State judge module 101 receives the alarm signal that the second alarm collection module 103 exports, to enable to link switching control module 104 output switchings, trigger it control link is switched to the first communication link, meanwhile, the current control link of link switching control module 104 notify status latch module 105 mark is designated 0; Or, Link State judge module 101 is determined when current non-control link (the first communication link) parses the control link hand off signaling of appointing with BBU, also trigger link switching controls module 104 is carried out to control link switching, after switching, the data of the first communication link are directly transferred to control information extraction module 106 by down link, and the data that up link is collected control information collection module 107 send on the first communication link.
When concrete enforcement, can for example, export commutator pulse according to predetermined period (can be, but not limited to be set to 10ms) to Link State judge module 101 by time block 108, Link State judge module 101 judges whether to receive according to the commutator pulse timing receiving the alarm signal that the first alarm collection module 102 or the second alarm collection module 103 are exported.
When concrete enforcement, Link State judge module 101, can also be used for receiving at the same time clock reference signal abnormality alarming signal that the first alarm collection module 102 and the second alarm collection module 103 export respectively or optical signal transceiver alarm signal or appoint with BBU control link hand off signaling time, trigger link switching controls module 104 keeps current control link constant.
When concrete enforcement, Link State judge module 101, can also be used for receiving at the same time the link step-out alarm signal that the first alarm collection module 102 and the second alarm collection module 103 are exported respectively, and when optical module 0 and optical module 1 all do not parse the link switching control signal of appointing with BBU, trigger link switching controls module 104 is switched according to default switching cycle between current control link and non-control link.Wherein, switching cycle can carry out arbitrary disposition according to actual needs, and for example, switching cycle can be preconfigured to 100ms.When Link State judge module 101 is determined to synchronously upper can trigger link switching controls module 104 stopping switching of a rare communication link, even Link State judge module 101 is specifying while not receiving the link step-out alarm signal that the first alarm collection module 102 exports in duration, on determining that the first communication link is synchronous, if Link State judge module 101 is specifying while not receiving the link step-out alarm signal that the second alarm collection module 103 exports in duration, determine in second communication link synchronization, simultaneously, the current control link mark of link switching control module 104 notify status latch module 105 mark.
When concrete enforcement, in the two fine transmission system that the embodiment of the present invention provides, control link switching device shifter can be arranged in RRU equipment.
Based on same inventive concept, control link changing method in a kind of two fine transmission system is also provided in the embodiment of the present invention, because the principle that said method is dealt with problems is similar to control link switching device shifter in two fine transmission systems, therefore the enforcement of said method can be referring to the enforcement of device, repeats part and repeat no more.
As shown in Figure 2, the implementing procedure schematic diagram of control link changing method in the two fine transmission system providing for the embodiment of the present invention, comprises the following steps:
S201, Link State judge module are determined current control link, and this current control link is the first communication link or second communication link;
In the time of Link State judge module electrifying startup or reset initial condition, acquiescence is used the first communication link as control link, and the current control link of latch module mark is designated 0 simultaneously.
S202, Link State judge module judge whether to receive the alarm signal of the first alarm collection module or the output of the second alarm collection module;
Wherein, the first alarm collection module is determined the first communication link outputting alarm signal when abnormal, and the second alarm collection module is determined outputting alarm signal when second communication link is abnormal.When concrete enforcement, the first alarm collection module is in the time that the first communication link one of meets the following conditions, determine that described the first communication link is abnormal, and export the alarm signal of the first communication link to Link State judge module: the first communication link clock reference signal is abnormal; Or the first communication link optical signal transceiver alarm; Or the first communication link step-out; Or the first communication link agreement control signal Pending The Entry Into Force; The second alarm collection module, in the time that second communication link one of meets the following conditions, determines that second communication link is abnormal: second communication link clock reference signal is abnormal; Or second communication link optical signal transceiver alarm; Or second communication link step-out; Or second communication link protocol control signal Pending The Entry Into Force.
If when S203 Link State judge module receives the abnormal alarm signal of current control link, trigger link switching controls module is carried out control link switching.
When concrete enforcement, also may there is following situation: Link State judge module receive clock reference signal abnormality alarming signal that the first alarm collection module and the second alarm collection module export respectively or optical signal transceiver alarm signal simultaneously or appoint with BBU control link hand off signaling time, now, Link State judge module trigger link switching controls module keeps current control link constant, even current control link is the first communication link, to keep the first communication link is control link, if current control link is second communication link, to keep second communication link is control link.
In addition, if Link State judge module receives the link step-out alarm signal that the first alarm collection module and the second alarm collection module are exported respectively simultaneously, and when optical module 0 and optical module 1 all do not parse the control link switching command of appointing with BBU, Link State judge module trigger link switching controls module is switched according to default switching cycle between current control link and non-control link, until at least one communication link synchronous on, trigger link switching controls module stops switching, the current control link mark of link switching control module notify status latch module mark, wherein, Link State judge module is in the time specifying the link step-out alarm signal that does not receive the first alarm collection module output in duration, on determining that the first communication link is synchronous, or Link State judge module is in the time specifying the link step-out alarm signal that does not receive the second alarm collection module output in duration, determine in second communication link synchronization.
Control link changing method in the two fine transmission system that the embodiment of the present invention provides, RRU can use two optical fiber to be connected with same BBU, or connect from different BBU, in improving transmission bandwidth, can automatically detect the abnormal of communication link, can realize the switching of control link without manual intervention, thereby solve the problem that extremely causes whole communication system failure due to RRU, guarantee the normal operation of communication system.
It should be noted that, the method that the embodiment of the present invention provides, can adopt as programmable logic devices such as FPGA, CPLD, EPLD and SPLD and realize, and also can use special asic chip and DSP programmable chip to realize.
Control link changing method in the two fine transmission system that the embodiment of the present invention provides, device and RRU equipment, Link State judge module is determined current control link, wherein, current control link can be the first communication link, also can be second communication link, and accuse and gather alert module monitors the first communication link by first, when the first communication link is when abnormal, the first alarm collection module is by the alarm signal of output the first communication link, the second alarm collection module monitoring second communication link, in the time that second communication link is abnormal, the second alarm collection module is by the alarm signal of output second communication link, like this, after Link State judge module is receiving the alarm signal of current control link, determine that current control link is abnormal, trigger link switching controls module is carried out to control link switching, owing to can detecting in time that by Link State judge module whether current control link is abnormal, and at current link during in abnormality, triggering control link is switched, thereby, avoid the communication system failure extremely causing due to control link, guarantee the normal operation of communication system.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (13)
1. a control link changing method in two fine transmission systems, is characterized in that, comprising:
Link State judge module is determined current control link, and described current control link is the first communication link or second communication link;
Described Link State judge module judges whether to receive the alarm signal of the first alarm collection module or the output of the second alarm collection module, described the first alarm collection module is determined the first communication link outputting alarm signal when abnormal, and described the second alarm collection module is determined outputting alarm signal when second communication link is abnormal;
If when Link State judge module receives the abnormal alarm signal of current control link, trigger link switching controls module is carried out control link switching.
2. the method for claim 1, is characterized in that, described alarm signal comprises clock reference signal abnormality alarming signal, or optical signal transceiver alarm signal, or link step-out alarm signal, or link protocol control signal Pending The Entry Into Force alarm signal.
3. method as claimed in claim 2, is characterized in that, also comprises:
If described Link State judge module receive clock reference signal abnormality alarming signal that described the first alarm collection module and the second alarm collection module export respectively or optical signal transceiver alarm signal simultaneously or appoint with baseband processing unit BBU control link hand off signaling time, trigger link switching controls module keeps current control link constant.
4. method as claimed in claim 2, is characterized in that, also comprises:
If when described Link State judge module receives the link step-out alarm signal that the first alarm collection module and the second alarm collection module export respectively simultaneously, and when optical module 0 and optical module 1 all do not parse the link switching control signal of appointing with BBU, described Link State judge module triggers described link switching control module and switches according to default switching cycle between current control link and non-control link.
5. method as claimed in claim 4, is characterized in that, also comprises:
Described Link State judge module is in the time specifying the link step-out alarm signal that does not receive the first alarm collection module or the output of the second alarm collection module in duration, and triggering described link switching control module, to lock the not communication link of output link step-out alarm signal be control link.
6. the method for claim 1, is characterized in that, also comprises:
Described Link State judge module is determined when current non-control link receives control link hand off signaling, triggers described link switching control module and carries out control link switching.
7. a control link switching device shifter in two fine transmission systems, is characterized in that, comprising:
Link State judge module, for determining current control link, described current control link is the first communication link or second communication link; And judge whether to receive the alarm signal of the first alarm collection module or the output of the second alarm collection module; And in the time receiving the abnormal alarm signal of current control link, trigger link switching controls module is carried out control link switching;
The first alarm collection module, for determining that the first communication link is when abnormal, to described Link State judge module outputting alarm signal;
The second alarm collection module, in the time that definite second communication link is abnormal, to described Link State judge module outputting alarm signal;
Link switching control module, under the triggering at described Link State judge module, carries out control link switching.
8. device as claimed in claim 7, is characterized in that, described alarm signal comprises clock reference signal abnormality alarming signal, or optical signal transceiver alarm signal, or link step-out alarm signal, or link protocol control signal Pending The Entry Into Force alarm signal; And
Described the first alarm collection module, specifically for determining that described the first communication link clock reference signal is when abnormal, to described Link State judge module output clock reference signal abnormality alarming signal; Or determine in the time of described the first communication link optical signal transceiver alarm, to described Link State judge module output optical signal transmitting-receiving alarm signal; Or determine in the time of described the first communication link step-out, to described Link State judge module output link step-out alarm signal; Or determine in the time of described the first communication link agreement control signal Pending The Entry Into Force, to described Link State judge module output link agreement control signal Pending The Entry Into Force alarm signal;
Described the second alarm collection module, specifically in the time that definite described second communication link clock reference signal is abnormal, to described Link State judge module output clock reference signal abnormality alarming signal; Or determine in the time of described second communication link optical signal transceiver alarm, to described Link State judge module output optical signal transmitting-receiving alarm signal; Or determine in the time of described second communication link step-out, to described Link State judge module output link step-out alarm signal; Or determine in the time of described second communication link protocol control signal Pending The Entry Into Force, to described Link State judge module output link agreement control signal Pending The Entry Into Force alarm signal.
9. device as claimed in claim 8, is characterized in that,
Described Link State judge module, also for receive at the same time clock reference signal abnormality alarming signal that described the first alarm collection module and the second alarm collection module export respectively or optical signal transceiver alarm signal or appoint with baseband processing unit BBU control link hand off signaling time, trigger link switching controls module keeps current control link constant.
10. device as claimed in claim 8, is characterized in that,
Described Link State judge module, also when receiving at the same time the link step-out alarm signal that the first alarm collection module and the second alarm collection module export respectively, and when optical module 0 and optical module 1 all do not parse the link switching control signal of appointing with BBU, trigger described link switching control module and switch according to default switching cycle between current control link and non-control link.
11. devices as claimed in claim 10, is characterized in that,
Described Link State judge module, while being also used to specify the link step-out alarm signal that does not receive the first alarm collection module or the output of the second alarm collection module in duration, triggering described link switching control module, to lock the not communication link of output link step-out alarm signal be control link.
12. devices as claimed in claim 7, is characterized in that,
Described Link State judge module, while also receiving control link hand off signaling for definite current non-control link, triggers described link switching control module and carries out control link switching.
13. 1 kinds of radio frequency remote equipments, is characterized in that, comprise the control link switching device shifter described in the arbitrary claim of claim 7 ~ 12.
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| CN103780302B (en) | 2016-03-30 |
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Address after: 510663 No. 10 Shenzhou Road, Guangzhou Science City, Guangdong Province Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 No. 10 Shenzhou Road, Guangzhou Science City, Guangdong Province Patentee before: Comba Telecom System (China) Ltd. |