CN103780302B - Control link changing method, device and RRU device in two fine transmission system - Google Patents
Control link changing method, device and RRU device in two fine transmission system Download PDFInfo
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Abstract
The invention discloses control link changing method, device and RRU device in a kind of two fine transmission system, in order to detect the abnormal also trigging control link switching of control link in two fine transmission system, ensure that communication system is normally run, wherein, described method comprises: Link State judge module determines current control link, and described current control link is the first communication link or second communication link; Described Link State judge module judges whether the alarm signal receiving the first alarm collection module or the output of the second alarm collection module, outputting alarm signal when described first alarm collection module determines that the first communication link is abnormal, outputting alarm signal when described second alarm collection module determination second communication link is abnormal; If when Link State judge module receives the alarm signal of current control link exception, trigger link switching controls module carries out control link switching.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to control link changing method, device and RRU device in a kind of two fine transmission system.
Background technology
Along with the development of the communication technology especially third generation communication technology, in fiber optic transmission system, simple optical fiber transmission rate also cannot meet system requirements, be limited by hardware transport platform, as string and and to go here and there forward process capability improving slower etc., uses the transmission platform of transmit communications signals while of two optical fiber to arise at the historic moment.In two fine transmission system, overall system bandwidth is two fiber bandwidth sums, but usually 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 loss, reference clock signal exception, link step-out etc., just there will be the uncontrolled situation of radio frequency remote equipment (RRU, RadioRemoteUnit), now, whole communication system will be caused to break down.
Therefore, how under abnormal conditions appear in current control link, carry out abnormality detection, and the function being transmitted control and management information is switched on another optical communication link, to ensure the normal operation of communication system, become one of technical problem urgently to be resolved hurrily in prior art.
Summary of the invention
Embodiments provide control link changing method, device and RRU device in a kind of two fine transmission system, in order to detect the abnormal also trigging control link switching of control link in two fine transmission system, ensure that communication system is normally run.
The embodiment of the present invention provides control link changing method in a kind of two fine transmission system, comprising:
Link State judge module determines current control link, and described current control link is the first communication link or second communication link;
Described Link State judge module judges whether the alarm signal receiving the first alarm collection module or the output of the second alarm collection module, outputting alarm signal when described first alarm collection module determines that the first communication link is abnormal, outputting alarm signal when described second alarm collection module determination second communication link is abnormal;
If when Link State judge module receives the alarm signal of current control link exception, trigger link switching controls module carries 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 the alarm signal receiving the first alarm collection module or the output of the second alarm collection module; And when receiving the alarm signal of current control link exception, trigger link switching controls module carries out control link switching.
First alarm collection module, for when determining that the first communication link is abnormal, to described Link State judge module outputting alarm signal;
Second alarm collection module, for when determining that second communication link is abnormal, to described Link State judge module outputting alarm signal;
Link switching control module, under the triggering of described Link State judge module, carries out control link switching.
The embodiment of the present invention provides a kind of RRU device, 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 device, Link State judge module determines current control link, wherein, current control link can be the first communication link, also can be second communication link, and accuse alert module monitors first communication link of collection by first, when the first communication link is abnormal, first alarm collection module is by the alarm signal of output first communication link, second alarm collection module monitoring second communication link, when second communication link is abnormal, second alarm collection module will export the alarm signal of second communication link, like this, when Link State judge module is after the alarm signal receiving current control link, determine that current control link is abnormal, trigger link switching controls module is carried out control link switching, owing to can be detected that by Link State judge module whether current control link is abnormal in time, and when current ink is in abnormality, trigging control link switching, thus, avoid the communication system failure caused because control link is abnormal, ensure that the normal operation of communication system.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
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 system;
Fig. 2 is in the embodiment of the present invention, the implementing procedure schematic diagram of control link changing method in two fine transmission system.
Embodiment
In order to detect the abnormal also trigging control link switching of control link in two fiber communication system, ensureing that communication system is normally run, embodiments providing control link changing method, device and RRU device in a kind of two fine transmission system.
According to new distribution type network coverage requirement, at present, usually baseband processing unit (BBU is adopted in quorum sensing inhibitor system, BaseBandUnit) coverage mode be connected with RRU, in the system that bandwidth transfer requirement is higher, general employing double joint Fiber connection BBU and RRU, in the system of transmission two kinds of networks with different systems signals, the BBU often also adopting simple optical fiber to connect different systems respectively transmits respective control information.Therefore, for RRU, its needs can support two Optical Fiber Transmission simultaneously, and automatically adopt a communication link in good condition to transmit control and management information according to optic communication links state, to ensure that RRU still normally can 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 system, by downstream communications link, and the state of monitoring two communication links in real time, and monitor BBU and whether send switching command, carry out the switching of control link accordingly.Wherein, the state of real-time monitoring communications link, comprise monitoring two communication link and whether 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 the switching of control link be carried out, and use the communication link control and management information after switching.Meanwhile, mark current control link, exchange transmission and control for communications link signals switching, up link and status poll etc. is provided; In the uplink, 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 instruction and explanation of the present invention, be not intended to limit the present invention, and when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
As shown in Figure 1, be the structural representation of control link switching device shifter in the two fine transmission system that the embodiment of the present invention provides, comprise:
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 the alarm signal receiving the first alarm collection module 102 or the output of the second alarm collection module 103; And when receiving the alarm signal of current control link exception, trigger link switching controls module 104 carries out control link switching;
During concrete enforcement, RRU by two optical fiber simultaneously with same BBU, or different BBU connects, therefore, each root optical fiber forms a communication link, like this, there are 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.
During concrete enforcement, the alarm signal that first alarm collection module 102 and the second alarm collection module 103 export 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.
First alarm collection module 102, for when determining that the first communication link is abnormal, to Link State judge module 101 outputting alarm signal;
During concrete enforcement, first alarm collection module 102 is connected with optical module 0 by Serdes0 module, Serdes0 module is in the downlink for realizing serioparallel exchange, parallel data are reverted to by serial bit stream, when Serdes0 module detects that the first communication link clock reference signal is abnormal or the first communication link exists optical signal transceiver alarm, will to the first alarm collection module 102 output clock reference signal abnormality alarming signal or optical signal transceiver alarm signal, first alarm collection module 102 is after receiving clock reference signal abnormality alarming signal or optical signal transceiver alarm signal, determine the first communication link clock reference signal exception or there is 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, by the first communication link timing transmission synchronous code between BBU and RRU, determine whether the first communication link link step-out occurs according to this synchronous code, when determining link step-out occurs, will to the first alarm collection module 102 output link step-out alarm signal, first alarm collection module 102, after receiving link step-out alarm signal, determines the first communication link step-out, will to Link State judge module 101 output link step-out alarm signal.When 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 signal.
Second alarm collection module 103, for when determining that second communication link is abnormal, to Link State judge module 101 outputting alarm signal;
During concrete enforcement, second alarm collection module 103 is connected with optical module 1 by Serdes1 module, 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 of Link State judge module 101, carries out control link switching.
Concrete, if current control link is the first communication link, and Link State judge module 101 receive first alarm collection module 102 export alarm signal after, will be enable to link switching control module 104 output switching, trigger it and control link is switched to second communication link, meanwhile, link switching control module 104 notify status latch module 105 marks current control link and is designated 1; Or when Link State judge module 101 determines that current non-controlling link (second communication link) parses the control link hand off signaling appointed with BBU, also trigger link switching controls module 104 is carried out 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, the control and management information of control link output is extracted by link switching control module 104, according to the form appointed with external processing module or chip, carry out certain Data Analysis and conversion, be transported on external processing module or chip; The data that control information collection module 107 is collected are sent on second communication link by up link, wherein, control information collection module 107 is mainly for up link, according to the form appointed with external processing module or chip, receive data and carry out certain data packing and conversion, being sent in control link by link switching control module 104.
If current control link is second communication link, and Link State judge module 101 receive second alarm collection module 103 export alarm signal after, will be enable to link switching control module 104 output switching, trigger it and control link is switched to the first communication link, meanwhile, link switching control module 104 notify status latch module 105 marks current control link and is designated 0; Or, when Link State judge module 101 determines that current non-controlling link (the first communication link) parses the control link hand off signaling appointed with BBU, also trigger link switching controls module 104 is carried out 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 control information collection module 107 is collected are sent on the first communication link by up link.
During concrete enforcement, can export commutator pulse according to predetermined period (such as 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 according to the commutator pulse timing received the alarm signal receiving the first alarm collection module 102 or the output of the second alarm collection module 103.
During concrete enforcement, Link State judge module 101, during the control link hand off signaling that can also be used for receiving at the same time clock reference signal abnormality alarming signal or optical signal transceiver alarm signal that the first alarm collection module 102 and the second alarm collection module 103 export respectively or appoint with BBU, trigger link switching controls module 104 keeps current control link constant.
During 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 export respectively, and optical module 0 and optical module 1 be not when all parsing the link switching control signal appointed with BBU, trigger link switching controls module 104 switches according to default switching cycle between current control link and non-controlling link.Wherein, switching cycle can carry out arbitrary disposition according to actual needs, and such as, switching cycle can be preconfigured to 100ms.When Link State judge module 101 is determined to, a rare communication link is synchronously upper can trigger link switching controls module 104 be stopped switching, even Link State judge module 101 is when specifying in duration the link step-out alarm signal not receiving the first alarm collection module 102 output, on determining that the first communication link is synchronous, if Link State judge module 101 is when specifying in duration the link step-out alarm signal not receiving the second alarm collection module 103 output, determine in second communication link synchronization, simultaneously, link switching control module 104 notify status latch module 105 marks current control link mark.
During 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 device.
Based on same inventive concept, control link changing method in a kind of two fine transmission system is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to said method is similar to control link switching device shifter in two fine transmission system, therefore the enforcement of said method see the enforcement of device, can repeat part and repeats no more.
As shown in Figure 2, be the implementing procedure schematic diagram of control link changing method in the two fine transmission system that the embodiment of the present invention provides, comprise the following steps:
S201, Link State judge module determine current control link, and this current control link is the first communication link or second communication link;
When Link State judge module electrifying startup or reset initial condition, acquiescence use first communication link is as control link, and latch module marks current control link and is designated 0 simultaneously.
S202, Link State judge module judge whether the alarm signal receiving the first alarm collection module or the output of the second alarm collection module;
Wherein, outputting alarm signal when the first alarm collection module determines that the first communication link is abnormal, outputting alarm signal when the second alarm collection module determination second communication link is abnormal.During concrete enforcement, first alarm collection module meets the following conditions for the moment at the first communication link, determine that described 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 protocol control signal Pending The Entry Into Force; Second alarm collection module meets the following conditions for the moment at second communication link, determines that second communication link is abnormal: second communication link clock reference signal is abnormal; Or the alarm of second communication link optical signal transceiver; 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 alarm signal of current control link exception, trigger link switching controls module carries out control link switching.
During concrete enforcement, also may there is following situation: Link State judge module receive clock reference signal abnormality alarming signal or optical signal transceiver alarm signal that the first alarm collection module and the second alarm collection module export respectively 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, be control link by maintenance first communication link, if current control link is second communication link, be control link by maintenance second communication 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 export respectively simultaneously, and optical module 0 and optical module 1 be not when all parsing the control link switching command appointed with BBU, Link State judge module trigger link switching controls module switches according to default switching cycle between current control link and non-controlling link, until at least one communication link synchronous on, trigger link switching controls module stops switching, link switching control module notify status latch module marks current control link mark, wherein, Link State judge module is when specifying in duration the link step-out alarm signal not receiving the first alarm collection module output, on determining that the first communication link is synchronous, or Link State judge module is when specifying in duration the link step-out alarm signal not receiving the second alarm collection module output, 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, while raising transmission bandwidth, automatically the exception of communication link can be detected, the switching of control link can be realized without the need to manual intervention, thus solve the problem causing whole communication system failure because RRU is abnormal, ensure that the normal operation of communication system.
It should be noted that, the method that the embodiment of the present invention provides, can adopt as the programmable logic devices such as FPGA, CPLD, EPLD and SPLD realize, special asic chip and DSP programmable chip also can be used to realize.
Control link changing method in the two fine transmission system that the embodiment of the present invention provides, device and RRU device, Link State judge module determines current control link, wherein, current control link can be the first communication link, also can be second communication link, and accuse alert module monitors first communication link of collection by first, when the first communication link is abnormal, first alarm collection module is by the alarm signal of output first communication link, second alarm collection module monitoring second communication link, when second communication link is abnormal, second alarm collection module will export the alarm signal of second communication link, like this, when Link State judge module is after the alarm signal receiving current control link, determine that current control link is abnormal, trigger link switching controls module is carried out control link switching, owing to can be detected that by Link State judge module whether current control link is abnormal in time, and when current ink is in abnormality, trigging control link switching, thus, avoid the communication system failure caused because control link is abnormal, ensure that the normal operation of communication system.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a control link changing method in two fine transmission system, is characterized in that, comprising:
Link State judge module determines current control link, and described current control link is the first communication link or second communication link;
Described Link State judge module judges whether the alarm signal receiving the first alarm collection module or the output of the second alarm collection module, outputting alarm signal when described first alarm collection module determines that the first communication link is abnormal, outputting alarm signal when described second alarm collection module determination second communication link is abnormal, 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;
If when Link State judge module receives the alarm signal of current control link exception, trigger link switching controls module carries out control link switching;
If described Link State judge module receive clock reference signal abnormality alarming signal or optical signal transceiver alarm signal that described first alarm collection module and the second alarm collection module export respectively simultaneously or appoint with baseband processing unit BBU control link hand off signaling time, trigger link switching controls module keeps current control link constant.
2. the method for claim 1, 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 optical module 0 and optical module 1 be not when all parsing the link switching control signal appointed 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-controlling link.
3. method as claimed in claim 2, is characterized in that, also comprise:
Described Link State judge module specify in duration do not receive link step-out alarm signal that the first alarm collection module or the second alarm collection module export time, triggering the communication link that described link switching control module locks non-output link step-out alarm signal is control link.
4. the method for claim 1, is characterized in that, also comprises:
When described Link State judge module determines that current non-controlling link receives control link hand off signaling, trigger described link switching control module and carry out control link switching.
5. a control link switching device shifter in two fine transmission system, 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 the alarm signal receiving the first alarm collection module or the output of the second alarm collection module; And when receiving the alarm signal of current control link exception, trigger link switching controls module carries out control link switching, 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;
First alarm collection module, for when determining that the first communication link is abnormal, to described Link State judge module outputting alarm signal;
Second alarm collection module, for when determining that second communication link is abnormal, to described Link State judge module outputting alarm signal;
Link switching control module, under the triggering of described Link State judge module, carries out control link switching; And receive clock reference signal abnormality alarming signal or optical signal transceiver alarm signal that described first alarm collection module and the second alarm collection module export respectively at the same time or appoint with baseband processing unit BBU control link hand off signaling time, trigger link switching controls module keeps current control link constant.
6. device as claimed in claim 5, is characterized in that,
Described first alarm collection module, specifically for when determining that described first communication link clock reference signal is abnormal, to described Link State judge module output clock reference signal abnormality alarming signal; Or determine when described first communication link optical signal transceiver alarm, to described Link State judge module output optical signal transmitting-receiving alarm signal; Or determine when described first communication link step-out, to described Link State judge module output link step-out alarm signal; Or determine when described first communication link protocol control signal Pending The Entry Into Force, to described Link State judge module output link protocol integrated test system signaling Pending The Entry Into Force alarm signal;
Described second alarm collection module, specifically for when determining that described second communication link clock reference signal is abnormal, to described Link State judge module output clock reference signal abnormality alarming signal; Or determine when described second communication link optical signal transceiver alarm, to described Link State judge module output optical signal transmitting-receiving alarm signal; Or determine when described second communication link step-out, to described Link State judge module output link step-out alarm signal; Or determine when described second communication link protocol control signal Pending The Entry Into Force, to described Link State judge module output link protocol integrated test system signaling Pending The Entry Into Force alarm signal.
7. device as claimed in claim 6, is characterized in that,
Described Link State judge module, time also for receiving link step-out alarm signal that the first alarm collection module and the second alarm collection module export respectively at the same time, and optical module 0 and optical module 1 be not when all parsing the link switching control signal appointed with BBU, trigger described link switching control module and switch according to default switching cycle between current control link and non-controlling link.
8. device as claimed in claim 7, is characterized in that,
Described Link State judge module, also be used to specify in duration when not receiving link step-out alarm signal that the first alarm collection module or the second alarm collection module export, triggering the communication link that described link switching control module locks non-output link step-out alarm signal is control link.
9. device as claimed in claim 5, is characterized in that,
Described Link State judge module, time also for determining that current non-controlling link receives control link hand off signaling, triggering described link switching control module and carrying out control link switching.
10. a radio frequency remote equipment, is characterized in that, comprises the control link switching device shifter described in the arbitrary claim of claim 5 ~ 9.
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| CN104660326A (en) * | 2015-02-13 | 2015-05-27 | 田勐 | High-speed and automatic SDH (synchronous digital hierarchy) switching method and device based on channel quality |
| CN108322922B (en) * | 2018-01-02 | 2021-02-12 | 西安万像电子科技有限公司 | Link switching method and device |
| CN112543125B (en) * | 2020-12-22 | 2022-08-09 | 宁波均联智行科技股份有限公司 | Serial communication system and link switching method applied to same |
| CN113242243A (en) * | 2021-05-12 | 2021-08-10 | 江苏亨鑫众联通信技术有限公司 | Super-bandwidth signal transmission method and system |
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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. |