CN102611493B - The troubleshooting of BBU, RRU, annular networking, restoration methods and system - Google Patents

The troubleshooting of BBU, RRU, annular networking, restoration methods and system Download PDF

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Publication number
CN102611493B
CN102611493B CN201110024514.7A CN201110024514A CN102611493B CN 102611493 B CN102611493 B CN 102611493B CN 201110024514 A CN201110024514 A CN 201110024514A CN 102611493 B CN102611493 B CN 102611493B
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rru
light mouth
control word
physical control
bbu
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CN102611493A (en
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张仕亮
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2011/081881 priority patent/WO2012097628A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0641—Change of the master or reference, e.g. take-over or failure of the master
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0823—Errors, e.g. transmission errors
    • H04L43/0829—Packet loss

Abstract

The invention discloses a kind of BBU, RRU, the troubleshooting of annular networking, restoration methods and system, the continuity of business can be ensured.Described fault handling method comprises: in looped network, certain optical fiber breaks down and touches light outlets LOP alarm, and the RRU of fault optical fiber rear class carries out clock switching; BBU knows light mouth LOP alarm by the first light mouth, and the RRU having been carried out clock switching by the second light mouth in looped network sends the first physical control word, to indicate the second light mouth link re-establishment having carried out RRU and the BBU that clock switches.Described fault recovery method comprises: BBU, after knowing that described fiber failure recovers, issues the first physical control word from the second light mouth, carries out clock switching to indicate the RRU having carried out link re-establishment when described fiber failure; BBU issues the second physical control word from the first light mouth, has carried out RRU that clock switches from present clock locking light mouth and the first light mouth link re-establishment of described BBU to indicate.

Description

The troubleshooting of BBU, RRU, annular networking, restoration methods and system
Technical field
The present invention relates to communication field, particularly relates to a kind of BBU (baseband processing unit), RRU (remote radio unit (RRU)), and troubleshooting under annular networking mode, restoration methods and system.
Background technology
TD-SCDMA (TD SDMA) network uses distribution-type base station architecture in a large number, BBU (Building Base band Unite, baseband processing unit) concentrate and place, RRU (Radio RemoteUnit, remote radio unit (RRU)) networking mode that strange land is zoomed out, adopt Fiber connection between BBU and RRU.A BBU can support multiple RRU.The networking mode of RRU has: chain, star-like, and these networking modes only have a pair optical fiber to connect with BBU, do not possess fiber protection function.What the distance between BBU and RRU had reaches tens kilometers, usually because optical fiber causes RRU normally cannot provide business by external world.For this reason, propose the novel networking mode of a kind of RRU: annular networking, namely BBU is connected with RRU respectively by two light mouths.
But under annular networking mode, when fiber failure, how to ensure that the continuity of business is current Problems existing.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of BBU, RRU, the troubleshooting of annular networking, restoration methods and system, ensures the continuity of business.
For solving the problems of the technologies described above, the invention provides the fault handling method under a kind of annular networking mode, comprising:
In looped network, certain optical fiber breaks down and touches (LOP) alarm of light outlets luminous power disappearance, and the remote radio unit (RRU) (RRU) of fault optical fiber rear class carries out clock switching; Baseband processing unit (BBU) knows light mouth LOP alarm by the first light mouth, in looped network, carry out by the second light mouth the RRU that clock switches and sent the first physical control word, to have carried out the second light mouth link re-establishment of RRU and the BBU that clock switches described in indicating.
Preferably, the optical fiber broken down described in is downlink optical fiber; The step that the RRU of described fault optical fiber rear class carries out clock switching comprises:
Current first line of a couplet light mouth connects the RRU of described downlink optical fiber after described light mouth LOP alarm being detected, clock is switched to current second line of a couplet light mouth, if and the RRU that described current first line of a couplet light mouth connects described downlink optical fiber is non-final stage RRU in looped network, then close the transmission optical fiber of its current second line of a couplet light mouth;
All subordinate RRU that described current first line of a couplet light mouth connects the RRU of described downlink optical fiber perform following operation step by step according to the order from prime to rear class: detect due to after the LOP alarm that optical fiber closure triggers, clock is switched to second line of a couplet light mouth; Judge that this RRU is non-final stage RRU, then close the transmission optical fiber of its current second line of a couplet light mouth.
Preferably, described in the optical fiber that breaks down be downlink optical fiber, by the first light mouth, BBU knows that the step of light mouth LOP alarm comprises:
Current first line of a couplet light mouth connects the RRU of described downlink optical fiber after described light mouth LOP alarm being detected, close the transmission optical fiber of its current first line of a couplet light mouth, the higher level RRU of described RRU detects due to after the LOP alarm that optical fiber closure triggers, and this LOP alarm is reported to step by step BBU first light mouth; Or
When the RRU that current first line of a couplet light mouth connects described downlink optical fiber is chopped-off head RRU, it is after described light mouth LOP alarm being detected, directly by this LOP alarm report to BBU first light mouth.
Preferably, the RRU that described BBU has carried out clock switching by the second light mouth in looped network sends the first physical control word, comprises with the step of the second light mouth link re-establishment indicating described RRU and BBU:
The RRU that described BBU has carried out clock switching by the second light mouth in looped network sends the first physical control word;
The light mouth that the described RRU having carried out clock switching locks from present clock receives described first physical control word, judge described first physical control word be belong to this RRU process physical control word after, if judge that it has pent transmission optical fiber, then open pent transmission optical fiber, and from the light mouth of present clock locking and the second light mouth link re-establishment of described BBU.
Preferably, described in the optical fiber that breaks down be uplink optical fibers, by the first light mouth, described BBU knows that the step of light mouth LOP alarm comprises:
Current second line of a couplet light mouth connects the RRU of described uplink optical fibers after described light mouth LOP alarm being detected, this LOP alarm is reported to step by step BBU first light mouth.
Preferably, described in the optical fiber that breaks down be uplink optical fibers, the step that the RRU of described fault optical fiber rear class carries out clock switching comprises:
After described BBU knows light mouth LOP alarm from the first light mouth, the second physical control word is sent from the first light mouth, the RRU of fault optical fiber rear class, after receiving described second physical control word, judges that described second physical control word is the physical control word not belonging to this RRU process, carries out clock switching.
Preferably, the RRU that described BBU has carried out clock switching by the second light mouth in looped network sends the first physical control word, comprises with the step of the second light mouth link re-establishment indicating described RRU and BBU:
Described BBU sends the first physical control word by the second light mouth to the RRU in looped network;
The carrying out of described fault optical fiber rear class clock switches after RRU receives the first physical control word, judges that described first physical control word is the physical control word belonging to this RRU process, from the light mouth of present clock locking and the second light mouth link re-establishment of described BBU.
Preferably, described BBU is after knowing that fiber failure recovers, according to the arrangement before fiber failure the 3rd physical control word, and issue from the second light mouth, the RRU of link re-establishment has been carried out after receiving the 3rd physical control word when described fiber failure, judge that described 3rd physical control word is the physical control word not belonging to this RRU process, carry out clock switching;
Described BBU issues the 4th physical control word from the first light mouth, to have carried out RRU that clock switches the first light mouth link re-establishment from present clock locking light mouth and described BBU described in indicating.
For solving the problems of the technologies described above, present invention also offers the fault recovery method under a kind of annular networking mode, in looped network during certain fiber failure, the rear class remote radio unit (RRU) (RRU) of fault optical fiber and the second light mouth of baseband processing unit (BBU) have carried out link re-establishment, and described method comprises:
Described BBU, after knowing that described fiber failure recovers, issues the first physical control word from the second light mouth, carries out clock switching to indicate the RRU having carried out link re-establishment when described fiber failure;
Described BBU issues the second physical control word from the first light mouth, to have carried out RRU that clock switches the first light mouth link re-establishment from present clock locking light mouth and described BBU described in indicating.
Preferably, described BBU issues the first physical control word from the second light mouth, comprises with the step indicating the RRU having carried out link re-establishment when described fiber failure to carry out clock switching:
Described BBU configures the first physical control word according to the described second light mouth that is configured to before described fiber failure, sends described first physical control word from described second light mouth;
The RRU having carried out link re-establishment when described fiber failure, after receiving the first physical control word, judges that described first physical control word is the physical control word not belonging to this RRU process, carries out clock switching.
Preferably, described BBU issues the second physical control word from the first light mouth, comprises from the step of the first light mouth link re-establishment of present clock locking light mouth and described BBU to have carried out RRU that clock switches described in indicating:
Described BBU according to being configured to described first smooth outlet structure second physical control word before described fiber failure, and sends described second physical control word from described first light mouth;
Link re-establishment has been carried out when described fiber failure, and carried out the RRU of clock switching after receiving described second physical control word according to described first physical control word, judge that described second physical control word is the physical control word belonging to this RRU process, then lock the first light mouth link re-establishment of light mouth and described BBU from present clock.
For solving the problems of the technologies described above, present invention also offers the fault processing system under a kind of annular networking mode, comprise: be positioned at the first device of remote radio unit (RRU) (RRU) and be positioned at the second device of baseband processing unit (BBU), wherein:
Described first device, when breaking down for certain optical fiber in looped network and touch (LOP) alarm of light outlets luminous power disappearance, control RRU carries out clock switching, and for after the first physical control word receiving described BBU transmission, with described BBU link re-establishment;
Described second device, for knowing light mouth LOP alarm by the first light mouth, and the RRU switched for having been carried out clock in looped network by the second light mouth sends the first physical control word, indicates the second light mouth link re-establishment of described RRU and BBU.
Preferably, described first device comprises first module, second unit and Unit the 3rd, wherein:
Described first module, when the downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, or detecting due to after the LOP alarm that optical fiber closure triggers, is switched to second line of a couplet light mouth, and closes transmission optical fiber by clock;
Described second unit, for detecting due to after the LOP alarm that optical fiber closure triggers, reports to BBU first light mouth step by step by this LOP alarm;
Described Unit the 3rd, for determining that current RRU has carried out clock switching, and receive that described BBU sends from the second light mouth belong to the first physical control word of this RRU process after, with the second light mouth link re-establishment of BBU.
Preferably, described first module comprises modules A and module B, wherein:
Described modules A, when downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, judge that current RRU is final stage RRU, then described modules A closes the transmission optical fiber of described current RRU first line of a couplet light mouth, judge that current RRU is non-final stage RRU, then described modules A closes the transmission optical fiber of described current RRU current second line of a couplet light mouth;
Described module B, for detecting due to after the LOP alarm that optical fiber closure triggers, the clock of current RRU is switched to current second line of a couplet light mouth, and judge whether current RRU is final stage RRU, if, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth, if not, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth and the transmission optical fiber of current second line of a couplet light mouth.
Preferably, described first device also comprises Unit the 4th, its for receive from current first line of a couplet light mouth at current RRU do not belong to this RRU process physical control word after, control current RRU and carry out clock switching; After carrying out clock switching, after current RRU receives from present clock locking light mouth the physical control word belonging to this RRU process, control current RRU locks this physical control word of transmission of light mouth and BBU light mouth link re-establishment from present clock.
Preferably, described second device comprises: unit I and unit II, wherein:
Described unit I, for after the light mouth LOP alarm receiving the triggering of downlink optical fiber fault from the first light mouth, the first physical control word is constructed according to the RRU number that the second light mouth redefined controls, and send from the second light mouth, the RRU of clock switching and described second light mouth link re-establishment have been carried out in instruction;
Described unit II, for after the light mouth LOP alarm receiving the triggering of uplink optical fibers fault from the first light mouth, construct the second physical control word according to the RRU number that the first light mouth redefined controls, and send from described first light mouth, the RRU that non-first light mouth is controlled carries out clock switching; And construct the first physical control word for the RRU number controlled according to the second light mouth redefined, and send from described second light mouth, carry out the RRU of clock switching and described second light mouth link re-establishment described in making.
Preferably, described second device comprises: unit III, its for: from know fiber failure recover after, according to RRU number structure the 3rd physical control word that the second light mouth configured before fiber failure controls, and send from described second light mouth, the RRU that non-second light mouth is controlled carries out clock switching; And RRU number structure the 4th physical control word for controlling according to the first light mouth configured before fiber failure, and send from described first light mouth, carry out the RRU of clock switching and described first light mouth link re-establishment described in making.
For solving the problems of the technologies described above, present invention also offers the remote radio unit (RRU) (RRU) in a kind of annular networking mode, comprising first module, second unit and Unit the 3rd, wherein:
Described first module, when the downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, or detecting due to after the LOP alarm that optical fiber closure triggers, is switched to second line of a couplet light mouth, and closes transmission optical fiber by clock;
Described second unit, for detecting due to after the LOP alarm that optical fiber closure triggers, reports to BBU first light mouth step by step by this LOP alarm;
Described Unit the 3rd, for determining that current RRU has carried out clock switching, and receive that described BBU sends from the second light mouth belong to the first physical control word of this RRU process after, with the second light mouth link re-establishment of BBU.
Preferably, described first module comprises modules A and module B, wherein:
Described modules A, when downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, judge that current RRU is final stage RRU, then described modules A closes the transmission optical fiber of described current RRU first line of a couplet light mouth, judge that current RRU is non-final stage RRU, then described modules A closes the transmission optical fiber of described current RRU current second line of a couplet light mouth;
Described module B, for detecting due to after the LOP alarm that optical fiber closure triggers, the clock of current RRU is switched to current second line of a couplet light mouth, and judge whether current RRU is final stage RRU, if, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth, if not, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth and the transmission optical fiber of current second line of a couplet light mouth.
Preferably, described RRU also comprises Unit the 4th, its for receive from current first line of a couplet light mouth at current RRU do not belong to this RRU process physical control word after, control current RRU and carry out clock switching; After carrying out clock switching, after current RRU receives from present clock locking light mouth the physical control word belonging to this RRU process, control current RRU sends physical control word light mouth link re-establishment from present clock locking light mouth and BBU.
For solving the problems of the technologies described above, present invention also offers the baseband processing unit (BBU) in a kind of annular networking mode, comprising: first module, second unit, wherein:
Described first module, for after the light mouth LOP alarm receiving the triggering of downlink optical fiber fault from the first light mouth, the first physical control word is constructed according to the RRU number that the second light mouth redefined controls, and send from the second light mouth, the RRU of clock switching and described second light mouth link re-establishment have been carried out in instruction;
Described second unit, for after the light mouth LOP alarm receiving the triggering of uplink optical fibers fault from the first light mouth, construct the second physical control word according to the RRU number that the first light mouth redefined controls, and send from described first light mouth, the RRU that non-first light mouth is controlled carries out clock switching; And RRU number structure the 3rd physical control word for controlling according to the second light mouth redefined, and send from described second light mouth, carry out the RRU of clock switching and described second light mouth link re-establishment described in making.
Preferably, described BBU also comprises: Unit the 3rd, its for: from know fiber failure recover after, according to configure before fiber failure second light mouth control RRU number structure the 3rd physical control word, and send from described second light mouth, the RRU that non-second light mouth is controlled carries out clock switching; And RRU number structure the 4th physical control word for controlling according to the first light mouth configured before fiber failure, and send from described first light mouth, carry out the RRU of clock switching and described first light mouth link re-establishment described in making.
In the embodiment of the present invention, BBU and RRU according to the alarm of light mouth, and initiates light mouth heat switch by transmitting the alarm of light mouth, realizes RRU under BBU and RRU ring network mode from other second line of a couplet light mouth link setup, and switches step by step in the mode of fault delivery.After failure vanishes, initial connection state can be returned to rapidly.By the inventive method, when causing link to be had no progeny due to certain fiber failure, can switch as soon as possible and link re-establishment, guaranteeing the continuity of business, gain time for field maintenance person's field repair fault simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of looped network involved by the embodiment of the present invention;
Fig. 2 is the embodiment of the present invention 1 flow chart;
Fig. 3 is the downlink optical fiber fault schematic diagram of embodiment of the present invention 1RRU first line of a couplet light mouth;
Fig. 4 is the embodiment of the present invention 2 flow chart;
Fig. 5 is the uplink optical fibers fault schematic diagram of embodiment of the present invention 2RRU first line of a couplet light mouth;
Fig. 6 is the embodiment of the present invention 3 flow chart;
Fig. 7 is the normal schematic diagram of up-downgoing optical fiber of embodiment of the present invention 3RRU first line of a couplet light mouth.
Embodiment
Due to the limitation of prior art, service disconnection can be caused when there being certain fiber failure.The present invention proposes a kind of RRU reverse method for this reason, to carry out link switching, ensures the continuity of business.
The present invention is by the following technical solutions:
In looped network, certain optical fiber breaks down and touches (LOP) alarm of light outlets luminous power disappearance, and the remote radio unit (RRU) (RRU) of fault optical fiber rear class carries out clock switching; Baseband processing unit (BBU) knows light mouth LOP alarm by the first light mouth, in looped network, carry out by the second light mouth the RRU that clock switches and sent the first physical control word, to have carried out the second light mouth link re-establishment of RRU and the BBU that clock switches described in indicating.
Be positioned at the sending direction of RRU light mouth and the difference of receive direction for fault point, adopt different changing methods.
● described in the optical fiber that breaks down be downlink optical fiber:
The step that then RRU of fault optical fiber rear class carries out clock switching comprises:
Current first line of a couplet light mouth connects the RRU of described downlink optical fiber after described light mouth LOP alarm being detected, clock is switched to current second line of a couplet light mouth, if and the RRU that described current first line of a couplet light mouth connects described downlink optical fiber is non-final stage RRU in looped network, then close the transmission optical fiber of its current second line of a couplet light mouth;
All subordinate RRU that described current first line of a couplet light mouth connects the RRU of described downlink optical fiber perform following operation step by step according to the order from prime to rear class: detect due to after the LOP alarm that optical fiber closure triggers, clock is switched to second line of a couplet light mouth; Judge that this RRU is non-final stage RRU, then close the transmission optical fiber of its current second line of a couplet light mouth.
That is, by closing the transmission optical fiber of second line of a couplet light mouth step by step, rear class RRU is made to carry out clock switching.
By the first light mouth, above-mentioned BBU knows that the step of light mouth LOP alarm comprises:
Current first line of a couplet light mouth connects the RRU of described downlink optical fiber after described light mouth LOP alarm being detected, close the transmission optical fiber of its current first line of a couplet light mouth, the higher level RRU of described RRU detects due to after the LOP alarm that optical fiber closure triggers, and this LOP alarm is reported to step by step BBU first light mouth; Or
When the RRU that current first line of a couplet light mouth connects described downlink optical fiber is chopped-off head RRU, it is after described light mouth LOP alarm being detected, directly by this LOP alarm report to BBU first light mouth.
Preferably, in order to unified process, non-final stage RRU also can close the transmission optical fiber of current second line of a couplet light mouth.
That is, the object of closing the transmission optical fiber of first line of a couplet light mouth is to make BBU know this fiber failure.
The RRU that above-mentioned BBU has carried out clock switching by the second light mouth in looped network sends the first physical control word, comprises with the step of the second light mouth link re-establishment indicating described RRU and BBU:
The RRU that BBU has carried out clock switching by the second light mouth in looped network sends the first physical control word;
The light mouth that the described RRU having carried out clock switching locks from present clock receives described first physical control word, judge described first physical control word be belong to this RRU process physical control word after, if judge that it has pent transmission optical fiber, then open pent transmission optical fiber, and from the light mouth of present clock locking and the second light mouth link re-establishment of described BBU.
After the link re-establishment of described BBU second light mouth, RRU present clock locking light mouth is new first line of a couplet light mouth.The physical control word belonging to this RRU process can be such as be treated to legal physical control word to this RRU; The physical control word not belonging to this RRU process can be such as that this RRU is treated to illegal physical control word.
● described in the optical fiber that breaks down be uplink optical fibers:
By the first light mouth, above-mentioned BBU knows that the step of light mouth LOP alarm comprises:
Current second line of a couplet light mouth connects the RRU of described uplink optical fibers after described light mouth LOP alarm being detected, this LOP alarm is reported to step by step BBU first light mouth.
The step that the RRU of described fault optical fiber rear class carries out clock switching comprises:
After described BBU knows light mouth LOP alarm from the first light mouth, the second physical control word is sent from the first light mouth, the RRU of fault optical fiber rear class, after receiving described second physical control word, judges that described second physical control word is the physical control word not belonging to this RRU process, carries out clock switching.
The RRU that above-mentioned BBU has carried out clock switching by the second light mouth in looped network sends the first physical control word, comprises with the step of the second light mouth link re-establishment indicating described RRU and BBU:
Described BBU sends the first physical control word by the second light mouth to the RRU in looped network;
The carrying out of described fault optical fiber rear class clock switches after RRU receives the first physical control word, judges that described first physical control word is the physical control word belonging to this RRU process, from the light mouth of present clock locking and the second light mouth link re-establishment of described BBU.
After troubleshooting terminates, after the second light mouth of rear class RRU and the BBU of fault optical fiber has carried out link re-establishment, the method for fault recovery has comprised:
Step one, BBU, after knowing that described fiber failure recovers, issue the first physical control word from the second light mouth, carry out clock switching to indicate the RRU having carried out link re-establishment when described fiber failure;
Particularly, BBU configures the first physical control word according to the described second light mouth that is configured to before described fiber failure, sends the first physical control word from the second light mouth;
The RRU having carried out link re-establishment when fiber failure, after receiving the first physical control word, judges that the first physical control word is the physical control word not belonging to this RRU process, carries out clock switching.
Step 2, BBU issue the second physical control word from the first light mouth, to have carried out RRU that clock switches the first light mouth link re-establishment from present clock locking light mouth and described BBU described in indicating.
Particularly, BBU according to being configured to described first smooth outlet structure second physical control word before described fiber failure, and sends the second physical control word from the first light mouth;
Link re-establishment has been carried out when fiber failure, and carried out the RRU of clock switching after receiving the second physical control word according to the first physical control word, judge that the second physical control word is the physical control word belonging to this RRU process, then lock the first light mouth link re-establishment of light mouth and described BBU from present clock.
Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
First the ring network framework involved by the embodiment of the present invention is introduced below.As shown in Figure 1, looped network comprises BBU and some RRU, wherein some RRU are linked in sequence formation RRU chain step by step, the Yi Guangkou (main light port) of one end RRU and BBU of this RRU chain is connected, another light mouth (standby light mouth) of other end RRU and BBU is connected, and this BBU and RRU connects into a circulus.The RRU be connected with the main light port of BBU can be described as chopped-off head RRU, and the RRU be connected with the standby light mouth of BBU can be described as final stage RRU.Main light port direction is prime direction, and standby Guang Kou direction is rear class direction.
The light mouth of RRU and BBU link setup is the first line of a couplet light mouth of RRU, and another the non-link setup light mouth on RRU is second line of a couplet light mouth.Usual RRU obtains clock from first line of a couplet light mouth.
Embodiment 1
The present embodiment describes the fault handling method of the downlink optical fiber of RRU first line of a couplet light mouth, as shown in Figure 2, comprising:
Step one, the downlink optical fiber of certain RRU first line of a couplet light mouth breaks down, and this RRU detects LOP alarm;
Step 2, this detects that the RRU of LOP alarm changes and obtains clock from second line of a couplet light mouth, and stops the data of current first line of a couplet light mouth to send, or stops the data of current first line of a couplet light mouth and second line of a couplet light mouth to send;
Particularly, when this detects that the RRU of LOP alarm is final stage RRU, it only closes the transmission optical fiber of current first line of a couplet light mouth; When this detects that the RRU of LOP alarm is non-final stage RRU, its data of closing current first line of a couplet light mouth and second line of a couplet light mouth send, and namely close two and send optical fiber.Usually, only need the sending direction closing black out mouth, receive direction does not need to close.
This RRU closes the object sending optical fiber and is: for the higher level RRU of this RRU, and close after sending optical fiber, higher level RRU can detect LOP alarm, and higher level RRU can report step by step, finally makes BBU know LOP alarm; For the subordinate RRU of this RRU, after closing optical fiber, make subordinate RRU clock is switched to another light mouth, namely change and obtain clock, so that from other direction link setup from another light mouth.
What is called changes and obtains clock from another light mouth and refer to, changes the light mouth that obtains clock and locks, such as originally obtaining clock from light mouth 1, after switching, then lock and obtain clock from light mouth 0.
Step 3, in looped network, this detects that the higher level RRU of the RRU of LOP alarm is after LOP alarm being detected, and superior RRU reports LOP alarm step by step, until report to BBU;
Step 4, in looped network, this detects that all subordinate RRU of the RRU of LOP alarm perform following steps step by step:
A, detect that the downlink optical fiber of its first line of a couplet light mouth closes the LOP alarm caused, change and obtain clock from another light mouth;
B, judge whether this RRU is final stage RRU, if so, then close the transmission optical fiber of first line of a couplet light mouth, if not, then close the transmission optical fiber of upper and lower light mouth.
Hardware due to RRU does not have clock hold facility, so need RRU to switch rapidly clock to another one light mouth after light mouth LOP alarm being detected.
Above-mentioned steps three and step 4 are without fixing sequencing.
Step 5, BBU carries out internal resource information switching after knowing light mouth LOP alarm, and the light mouth not receiving LOP alarm from another sends physical control word to the RRU looped network, and instruction RRU carries out link re-establishment;
The physical control word that the light mouth that BBU never receives LOP alarm sends comprises: the identification information of the first RRU be connected with current light mouth, the RRU range information that current light mouth controls, from main light port to the transmission direction information of standby light mouth, particularly, available following formula represents:
The first RRU be connected with current light mouth identifies (Start RRU ID)=BBU current light mouth light slogan * 16+1;
Link instruction (Link Ind) i.e. transmission direction information, as Link Ind can represent from main light port to standby light port transmission for adding 1, Link Ind can represent from for light mouth transmit to main light port for subtracting 1;
If the current light mouth of BBU is main light port, then RRU scope (RRU the IDRANGE)=Start RRU ID+MainRruNum-1 of current light mouth control, wherein MainRruNum is the RRU number that main light port controls; If the current light mouth of BBU is standby light mouth, then RRU scope (RRU ID the RANGE)=Start RRU ID+1-SlaveRruNum of current light mouth control, wherein SlaveRruNum is the RRU number that standby light mouth controls.
The RRU that BBU current light mouth controls comprises from BBU current light mouth to all RRU this section of link of fault optical fiber, and particularly, the RRU that main light port controls comprises all RRU of fault optical fiber prime; The RRU that standby light mouth controls comprises all RRU of fault optical fiber rear class.
According to the regulation in standard, RRU mark is made up of 8 bits, and wherein high 4 is BBU light slogan, and low four is the progression of RRU.Usually, RRU has at most 15 grades, and the progression of the first RRU (i.e. chopped-off head RRU) be connected with main light port is 1, and the progression of the first RRU (i.e. final stage RRU) be connected with standby light mouth is 15.Calculate in units of the decimal system in above-mentioned formula.
Step 6, the RRU having carried out clock switching in looped network can receive the physical control word of BBU transmission, judges whether physical control word belongs to this RRU process (whether legal), if so, performs step 7, if not, then flow process terminates;
If RRU judges to meet the following conditions according to the physical control word received, then think that this physical control word belongs to the RRU scope that this RRU process (such as can think that this physical control word is legal): current RRU belongs to main light port control, and transmission direction information represents from main light port to standby light port transmission; Or current RRU belongs to the RRU scope that standby light mouth controls, and transmission direction information represents from standby light mouth and transmits to main light port.
Such as: Link Ind is for adding 1, and current RRU identifies (RRU ID)≤main light port RRU IDRANGE; Or Link Ind is for subtracting 1, and current RRU ID >=standby light mouth RRU ID RANGE.
If RRU judges that the physical control word received belongs to this RRU process, then determine that the light mouth that this receives physical control word is first line of a couplet light mouth, RRU will by this first line of a couplet light mouth and BBU link re-establishment.
Step 7, carry out clock switching in looped network and received the RRU belonging to the physical control word that this RRU processes performing following process of reconstruction:
M, judge whether to close transmission optical fiber, if so, then open the transmission optical fiber of closedown, perform step N, if not, then directly perform step N;
N, sent the light mouth link re-establishment of physical control word by the light mouth of current acquisition clock and BBU.
Eachly detect that the RRU of legal physical control word all performs above-mentioned flow process, until those RRU link re-establishments complete.After link re-establishment, current is the first line of a couplet light mouth that this RRU is new with the light mouth of BBU link setup, and another light mouth is new second line of a couplet light mouth.
The higher level RRU of the RRU of the first LOP of detecting alarm does not carry out link re-establishment, because the link between those RRU and BBU is intact.
As can be seen from above-mentioned steps, only complete clock and switch and link switching, RRU switches and just completes." switching " described herein is identical with the implication of " switching ".
Application example
This example illustrates the processing method of the downlink optical fiber fault of RRU first line of a couplet light mouth for looped network shown in Fig. 3, Initial R RU1, RRU2, RRU3 are from BBU light mouth 0 link setup, and when downlink optical fiber 3 fault of RRU2 first line of a couplet light mouth 0, processing method comprises:
Step 110, RRU2 detects LOP alarm;
After fiber failure, luminous power can be reduced to one can not the degree of transmission information, and at this moment RRU2 will record alarm, such as, can be completed by the FPGA (Field-Programmable Gate Array, field programmable gate array) in RRU2.
Step 120, RRU2 changes and obtains clock by second line of a couplet light mouth 1, closes simultaneously and sends optical fiber 4 and send optical fiber 5;
Step 130, because RRU2 sends the closedown of optical fiber 4, RRU1 detects the LOP alarm of second line of a couplet light mouth light mouth 1, and by this LOP alarm notification BBU;
Because RRU1 first line of a couplet light mouth is normal, it is without the need to carrying out clock switching.
Step 140, because RRU2 sends the closedown of optical fiber 5, RRU3 detects the LOP alarm of first line of a couplet light mouth 0, and clock is switched to light mouth 1 from original light mouth 0 by RRU3, namely changes and obtains clock by light mouth 1;
Because RRU3 is afterbody, after therefore it detects LOP alarm, be not related to black out fibre 7, only close optical fiber 6, i.e. the transmission optical fiber of current first line of a couplet light mouth.
This step and step 130 are without fixing precedence relationship;
Step 150, BBU starts internal resource information switching, and issues physical control word by BBU light mouth 1, and this physical control word is used to indicate RRU and carries out link switchover, namely from other direction and BBU link re-establishment;
Step 160, after RRU3 receives physical control word, after judging that this physical control word is legal, by light mouth 1 and BBU link setup, and opens the transmission optical fiber 6 of previously closing;
Step 170, RRU2 receives the physical control word of BBU transmission by receiving optical fiber 6, detect the legitimacy of this physical control word, if legal, then open the transmission optical fiber 4 of closedown and send optical fiber 5, by light mouth 1 again with BBU link setup, if illegal, continue detect wait for until legal or process ends;
In the present embodiment, RRU2 and RRU3 completes the link re-establishment with BBU light mouth 1, and RRU1 is unaffected.
Embodiment 2
The present embodiment describes the fault handling method of the uplink optical fibers of RRU first line of a couplet light mouth, as shown in Figure 4, comprising:
Step one: the uplink optical fibers of the first line of a couplet light mouth of certain RRU breaks down, and the higher level RRU of this RRU detects LOP alarm, and by this LOP alarm report to BBU;
RRU and BBU can only detect the alarm of receive direction.
The downlink optical fiber of the first line of a couplet light mouth of this RRU is normal, and its clock still can be locked in first line of a couplet light mouth.
Step 2, after BBU receives alarm, sends the first physical control word from the light mouth (as light mouth 0) receiving LOP alarm to rear class RRU;
After BBU receives alarm, RRU (all RRU of fault optical fiber prime) that main light port controls and the RRU (all RRU of fault optical fiber rear class) that standby light mouth controls will be recalculated.Therefore, all RRU of fault optical fiber prime will judge that the first physical control word that the BBU main light port that it receives sends is legal physical control word, and all RRU of fault optical fiber rear class will judge that the first physical control word that the BBU main light port that it receives sends is illegal physical control word.The object sending this first physical control word is, makes the RRU of fault optical fiber rear class carry out clock switching.
In the present embodiment the content of the first physical control word and a upper embodiment similar, comprising:
If light mouth 0 is main light port, then its physical control word sent comprises: the identification information of the first RRU be connected with main light port, the RRU range information that main light port controls, from main light port to the transmission direction information of standby light mouth, particularly, available following formula represents: the first RRU be connected with main light port identifies (Start RRU ID)=BBU main light port light slogan * 16+1; RRU scope (RRUID RANGE)=Start RRU ID+MainRruNum-1 that main light port controls; Link instruction (Link Ind) i.e. transmission direction information is for adding 1;
If light mouth 0 is standby light mouth, then its physical control word sent comprises: the identification information of the first RRU be connected with standby light mouth, for the RRU range information of light mouth control, from standby light mouth to the transmission direction information of main light port, particularly, available following formula represents: the first RRU be connected with standby light mouth identifies (Start RRU ID)=BBU for the total progression of RRU (such as 15) in light mouth light slogan * 16+ looped network; RRU scope (RRU ID RANGE)=Start RRU ID+1-SlaveRruNum that standby light mouth controls; Link instruction (Link Ind) i.e. transmission direction information is for subtracting 1.
Step 3, after the rear class RRU of fault optical fiber receives illegal physical control word, carries out clock switching, clock is switched to another light mouth from current light mouth;
Step 4, BBU carries out internal resource information switching, and the light mouth (as light mouth 1) not receiving LOP alarm from another sends the second physical control word, and instruction RRU carries out link re-establishment;
The form of the second physical control word is with the first physical control word.
Its BBU received is the physical control word belonging to this RRU process from the second physical control word that light mouth 1 sends to only have the RRU of fault optical fiber rear class just can judge.
The order of above step 3 and step 4 does not limit, and first can perform step 4, then perform step 3.
Step 5, receives the RRU of the second legal physical control word, from light mouth and the BBU link setup of Current lock clock.
Link setup is from fault optical fiber rear class RRU farthest at first.
Application example
This example illustrates the processing method of the uplink optical fibers fault of RRU first line of a couplet light mouth for looped network shown in Fig. 5, Initial R RU1, RRU2, RRU3 are from BBU light mouth 0 link setup, and when uplink optical fibers 4 fault of RRU2 first line of a couplet light mouth 0, processing method comprises:
Step 210, prime RRU1 detects that the uplink optical fibers 4 of RRU1 second line of a couplet light mouth 1 has LOP alarm, reports BBU by optical fiber 2;
Step 220, after BBU receives alarm, the optical fiber 1 under being connected by light mouth 0, optical fiber 3, optical fiber 5 issue the first physical control word to RRU1, RRU2 and RRU3, and this BBU issues the second physical control word by light mouth 1;
Step 230, after RRU3 receives the first physical control word from light mouth 0, after judging that this physical control word is illegal, carries out clock switching, changes and obtain clock from light mouth 1; After light mouth 1 receives the second physical control word, after judging that this second physical control word is legal, start link switching, namely pass through optical fiber 7 and optical fiber 8 link re-establishment at light mouth 1 and the light mouth 1 of BBU;
Step 240, after RRU2 receives the first physical control word from light mouth 0, after judging that this physical control word is illegal, carries out clock switching, changes and obtain clock from light mouth 1; After light mouth 1 receives the second legal physical control word, the light mouth 1 of RRU2 passes through light mouth 1 link setup of optical fiber 5 and optical fiber 6 and BBU.
In the present embodiment, RRU2 and RRU3 completes the link re-establishment with BBU light mouth 1, and RRU1 is unaffected.
Embodiment 3
The present embodiment describes fiber failure Recovery processing method, as shown in Figure 6, comprising:
After fiber failure recovers, BBU issues physical control word to the RRU occurred during fault or switch from two light mouths respectively, instructs those RRU to restPose.Comprise:
Step one: BBU knows the uplink optical fibers LOP alarm clearing of certain RRU first line of a couplet light mouth;
May be that BBU oneself detects, or higher level RRU detect the uplink optical fibers LOP alarm clearing of its subordinate RRU first line of a couplet light mouth, and LOP alarm clearing is reported BBU.
BBU knows that the light mouth of alarm clearing is relevant with the transmission direction of fault optical fiber, if the fault recovery of the optical fiber 3 in embodiment 1, is then detected by the light mouth 1 of BBU; If the fault recovery of the optical fiber 4 in embodiment 2, then detected by the light mouth 0 of BBU.
After step 2: BBU receives the notice of alarm clearing, issue the first physical control word according to the configuration before fiber failure from former link setup light mouth, another light mouth issues the second physical control word;
The physical control word that BBU now issues is that the number of the RRU controlled according to the light mouth of this physical control word of current transmission constructs, can see the physical control word format in embodiment 1.
Step 3: the RRU receiving the second physical control word carries out clock switch, obtains clock from another light mouth;
Step 4: the RRU having carried out clock switch receives the first physical control word from the light mouth of current acquisition clock, from this light mouth and BBU link re-establishment.
That carry out at first switching is higher level RRU; That finally carry out switching is final stage RRU.
Application example
This example illustrates the processing method of RRU light mouth fault recovery for looped network shown in Fig. 7, Initial R RU1, RRU2, RRU3 are from BBU light mouth 0 link setup, when the reception optical fiber 3 of RRU2 light mouth 0 or after sending optical fiber 4 fault, RRU2 and RRU3 passes through light mouth 1 and the BBU link re-establishment of BBU, when after optical fiber 3 or optical fiber 4 fault recovery, processing method comprises:
Step 310, BBU knows optical fiber 3 or optical fiber 4 alarm clearing;
During optical fiber 3 fault recovery, by RRU2, alarm clearing is reported BBU; During optical fiber 4 fault recovery, by RRU1, alarm clearing is reported BBU.
Step 320, BBU issues physical control word 1 to RRU3 and RRU2 by light mouth 1;
Step 330, after RRU3 receives physical control word 1, judges that this physical control word is illegal, then carries out clock switching, change and obtain clock from light mouth 0;
Step 340, after RRU2 receives physical control word 1, judges that this physical control word is illegal, then carries out clock switching, change and obtain clock from light mouth 0;
Step 350, BBU issues physical control word 2 by light mouth 0;
Step 360, RRU2 receives this physical control word 2 at first, after judging that this physical control word is legal, starts to carry out link switchover, passes through optical fiber 3 and optical fiber 4 link re-establishment at light mouth 0 and the light mouth 0 of BBU;
Step 370, RRU3 receives this physical control word 2, after judging that this physical control word is legal, passes through light mouth 0 link setup of optical fiber 5 and optical fiber 6 and BBU from light mouth 0.
In this example, RRU1 is unaffected.
Embodiment 4
The present embodiment describes for carrying out the RRU of troubleshooting in annular networking mode, and it comprises first module, second unit and Unit the 3rd, wherein:
Described first module, when the downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, or detecting due to after the LOP alarm that optical fiber closure triggers, is switched to second line of a couplet light mouth, and closes transmission optical fiber by clock;
Described second unit, for detecting due to after the LOP alarm that optical fiber closure triggers, reports to BBU first light mouth step by step by this LOP alarm;
Described Unit the 3rd, for determining that current RRU has carried out clock switching, and receive that described BBU sends from the second light mouth belong to the first physical control word of this RRU process after, with the second light mouth link re-establishment of BBU.
Preferably, described first module comprises modules A and module B, wherein:
Described modules A, when downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, judge that current RRU is final stage RRU, then described modules A closes the transmission optical fiber of described current RRU first line of a couplet light mouth, judge that current RRU is non-final stage RRU, then described modules A closes the transmission optical fiber of described current RRU current second line of a couplet light mouth;
Described module B, for detecting due to after the LOP alarm that optical fiber closure triggers, the clock of current RRU is switched to current second line of a couplet light mouth, and judge whether current RRU is final stage RRU, if, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth, if not, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth and the transmission optical fiber of current second line of a couplet light mouth.
Preferably, described RRU also comprises Unit the 4th, its for receive from current first line of a couplet light mouth at current RRU do not belong to this RRU process physical control word after, control current RRU and carry out clock switching; After carrying out clock switching, after current RRU receives from present clock locking light mouth the physical control word belonging to this RRU process, control current RRU sends physical control word light mouth link re-establishment from present clock locking light mouth and BBU.
Embodiment 5
The present embodiment to describe in annular networking mode for carrying out the BBU of troubleshooting, comprising: it comprises first module and second unit, wherein:
Described first module, for after the light mouth LOP alarm receiving the triggering of downlink optical fiber fault from the first light mouth, the first physical control word is constructed according to the RRU number that the second light mouth redefined controls, and send from the second light mouth, the RRU of clock switching and described second light mouth link re-establishment have been carried out in instruction;
Described second unit, for after the light mouth LOP alarm receiving the triggering of uplink optical fibers fault from the first light mouth, construct the second physical control word according to the RRU number that the first light mouth redefined controls, and send from described first light mouth, the RRU that non-first light mouth is controlled carries out clock switching; And RRU number structure the 3rd physical control word for controlling according to the second light mouth redefined, and send from described second light mouth, carry out the RRU of clock switching and described second light mouth link re-establishment described in making.
Preferably, described BBU also comprises: Unit the 3rd, its for: from know fiber failure recover after, according to configure before fiber failure second light mouth control RRU number structure the 3rd physical control word, and send from described second light mouth, the RRU that non-second light mouth is controlled carries out clock switching; And RRU number structure the 4th physical control word for controlling according to the first light mouth configured before fiber failure, and send from described first light mouth, carry out the RRU of clock switching and described first light mouth link re-establishment described in making.
Embodiment 6
RRU and BBU in embodiment 4 and embodiment 5 can form the fault processing system under an annular networking mode jointly, comprising: the first device being positioned at RRU and the second device being positioned at BBU, wherein:
Described first device, when breaking down for certain optical fiber in looped network and touch light outlets LOP alarm, control RRU carries out clock switching, and for after the first physical control word receiving described BBU transmission, with described BBU link re-establishment;
Described second device, for knowing light mouth LOP alarm by the first light mouth, and the RRU switched for having been carried out clock in looped network by the second light mouth sends the first physical control word, indicates the second light mouth link re-establishment of described RRU and BBU.
The unit that the unit that first device comprises and module comprise see RRU in embodiment 4 and module; The unit that the unit that second device comprises comprises see BBU in embodiment 5, repeats no more herein.
The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.

Claims (18)

1. the fault handling method under annular networking mode, comprising:
In looped network, certain optical fiber breaks down and touches light outlets luminous power disappearance LOP alarm, and the remote radio unit (RRU) RRU of fault optical fiber rear class carries out clock switching; Baseband processing unit BBU knows light mouth LOP alarm by the first light mouth, has carried out the RRU that clock switches send the first physical control word, to have carried out the second light mouth link re-establishment of RRU and the BBU that clock switches described in indicating by the second light mouth in looped network;
Described BBU is after knowing that fiber failure recovers, according to the arrangement before fiber failure the 3rd physical control word, and issue from the second light mouth, the RRU of link re-establishment has been carried out after receiving the 3rd physical control word when described fiber failure, judge that described 3rd physical control word is the physical control word not belonging to this RRU process, carry out clock switching;
Described BBU issues the 4th physical control word from the first light mouth, to have carried out RRU that clock switches the first light mouth link re-establishment from present clock locking light mouth and described BBU described in indicating.
2. the method for claim 1, is characterized in that:
The described optical fiber broken down is downlink optical fiber;
The step that the RRU of described fault optical fiber rear class carries out clock switching comprises:
Current first line of a couplet light mouth connects the RRU of described downlink optical fiber after described light mouth LOP alarm being detected, clock is switched to current second line of a couplet light mouth, if and the RRU that described current first line of a couplet light mouth connects described downlink optical fiber is non-final stage RRU in looped network, then close the transmission optical fiber of its current second line of a couplet light mouth;
All subordinate RRU that described current first line of a couplet light mouth connects the RRU of described downlink optical fiber perform following operation step by step according to the order from prime to rear class: detect due to after the LOP alarm that optical fiber closure triggers, clock is switched to second line of a couplet light mouth; Judge that this RRU is non-final stage RRU, then close the transmission optical fiber of its current second line of a couplet light mouth.
3. the method for claim 1, is characterized in that:
The described optical fiber broken down is downlink optical fiber, by the first light mouth, BBU knows that the step of light mouth LOP alarm comprises:
Current first line of a couplet light mouth connects the RRU of described downlink optical fiber after described light mouth LOP alarm being detected, close the transmission optical fiber of its current first line of a couplet light mouth, the higher level RRU of described RRU detects due to after the LOP alarm that optical fiber closure triggers, and this LOP alarm is reported to step by step BBU first light mouth; Or
When the RRU that current first line of a couplet light mouth connects described downlink optical fiber is chopped-off head RRU, it is after described light mouth LOP alarm being detected, directly by this LOP alarm report to BBU first light mouth.
4. method as claimed in claim 2 or claim 3, is characterized in that:
The RRU that described BBU has carried out clock switching by the second light mouth in looped network sends the first physical control word, comprises with the step of the second light mouth link re-establishment indicating described RRU and BBU:
The RRU that described BBU has carried out clock switching by the second light mouth in looped network sends the first physical control word;
The light mouth that the described RRU having carried out clock switching locks from present clock receives described first physical control word, judge described first physical control word be belong to this RRU process physical control word after, if judge that it has pent transmission optical fiber, then open pent transmission optical fiber, and from the light mouth of present clock locking and the second light mouth link re-establishment of described BBU.
5. the method for claim 1, is characterized in that:
The described optical fiber broken down is uplink optical fibers, by the first light mouth, described BBU knows that the step of light mouth LOP alarm comprises:
Current second line of a couplet light mouth connects the RRU of described uplink optical fibers after described light mouth LOP alarm being detected, this LOP alarm is reported to step by step BBU first light mouth.
6. method as claimed in claim 5, is characterized in that:
The described optical fiber broken down is uplink optical fibers, and the step that the RRU of described fault optical fiber rear class carries out clock switching comprises:
After described BBU knows light mouth LOP alarm from the first light mouth, the second physical control word is sent from the first light mouth, the RRU of fault optical fiber rear class, after receiving described second physical control word, judges that described second physical control word is the physical control word not belonging to this RRU process, carries out clock switching.
7. the method as described in claim 5 or 6, is characterized in that:
The RRU that described BBU has carried out clock switching by the second light mouth in looped network sends the first physical control word, comprises with the step of the second light mouth link re-establishment indicating described RRU and BBU:
Described BBU sends the first physical control word by the second light mouth to the RRU in looped network;
The carrying out of described fault optical fiber rear class clock switches after RRU receives the first physical control word, judges that described first physical control word is the physical control word belonging to this RRU process, from the light mouth of present clock locking and the second light mouth link re-establishment of described BBU.
8. the fault recovery method under annular networking mode, in looped network during certain fiber failure, the rear class remote radio unit (RRU) RRU of fault optical fiber and the second light mouth of baseband processing unit BBU have carried out link re-establishment, and described method comprises:
Described BBU, after knowing that described fiber failure recovers, issues the first physical control word from the second light mouth, carries out clock switching to indicate the RRU having carried out link re-establishment when described fiber failure;
Described BBU issues the second physical control word from the first light mouth, to have carried out RRU that clock switches the first light mouth link re-establishment from present clock locking light mouth and described BBU described in indicating.
9. method as claimed in claim 8, is characterized in that:
Described BBU issues the first physical control word from the second light mouth, comprises with the step indicating the RRU having carried out link re-establishment when described fiber failure to carry out clock switching:
Described BBU configures the first physical control word according to the described second light mouth that is configured to before described fiber failure, sends described first physical control word from described second light mouth;
The RRU having carried out link re-establishment when described fiber failure, after receiving the first physical control word, judges that described first physical control word is the physical control word not belonging to this RRU process, carries out clock switching.
10. method as claimed in claim 8, is characterized in that:
Described BBU issues the second physical control word from the first light mouth, comprises from the step of the first light mouth link re-establishment of present clock locking light mouth and described BBU to have carried out RRU that clock switches described in indicating:
Described BBU according to being configured to described first smooth outlet structure second physical control word before described fiber failure, and sends described second physical control word from described first light mouth;
Link re-establishment has been carried out when described fiber failure, and carried out the RRU of clock switching after receiving described second physical control word according to described first physical control word, judge that described second physical control word is the physical control word belonging to this RRU process, then lock the first light mouth link re-establishment of light mouth and described BBU from present clock.
Fault processing system under 11. 1 kinds of annular networking modes, comprising: be positioned at the first device of remote radio unit (RRU) RRU and be positioned at second device of baseband processing unit BBU, wherein:
Described first device, when breaking down for certain optical fiber in looped network and touch the LOP alarm of light outlets luminous power disappearance, control RRU carries out clock switching, and for after the first physical control word receiving described BBU transmission, with described BBU link re-establishment;
Described second device, for knowing light mouth LOP alarm by the first light mouth, and the RRU switched for having been carried out clock in looped network by the second light mouth sends the first physical control word, indicates the second light mouth link re-establishment of described RRU and BBU;
Described second device comprises: unit III, its for: from know fiber failure recover after, according to RRU number structure the 3rd physical control word that the second light mouth configured before fiber failure controls, and send from described second light mouth, the RRU that non-second light mouth is controlled carries out clock switching; And RRU number structure the 4th physical control word for controlling according to the first light mouth configured before fiber failure, and send from described first light mouth, carry out the RRU of clock switching and described first light mouth link re-establishment described in making.
12. systems as claimed in claim 11, is characterized in that, described first device comprises first module, second unit and Unit the 3rd, wherein:
Described first module, when the downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, or detecting due to after the LOP alarm that optical fiber closure triggers, is switched to second line of a couplet light mouth, and closes transmission optical fiber by clock;
Described second unit, for detecting due to after the LOP alarm that optical fiber closure triggers, reports to BBU first light mouth step by step by this LOP alarm;
Described Unit the 3rd, for determining that current RRU has carried out clock switching, and receive that described BBU sends from the second light mouth belong to the first physical control word of this RRU process after, with the second light mouth link re-establishment of BBU.
13. systems as claimed in claim 12, it is characterized in that, described first module comprises modules A and module B, wherein:
Described modules A, when downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, judge that current RRU is final stage RRU, then described modules A closes the transmission optical fiber of described current RRU first line of a couplet light mouth, judge that current RRU is non-final stage RRU, then described modules A closes the transmission optical fiber of described current RRU current second line of a couplet light mouth;
Described module B, for detecting due to after the LOP alarm that optical fiber closure triggers, the clock of current RRU is switched to current second line of a couplet light mouth, and judge whether current RRU is final stage RRU, if, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth, if not, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth and the transmission optical fiber of current second line of a couplet light mouth.
14. systems as claimed in claim 12, is characterized in that,
Described first device also comprises Unit the 4th, its for receive from current first line of a couplet light mouth at current RRU do not belong to this RRU process physical control word after, control current RRU and carry out clock switching; After carrying out clock switching, after current RRU receives from present clock locking light mouth the physical control word belonging to this RRU process, control current RRU locks this physical control word of transmission of light mouth and BBU light mouth link re-establishment from present clock.
15. systems as described in claim arbitrary in claim 11-14, it is characterized in that, described second device comprises: unit I and unit II, wherein:
Described unit I, for after the light mouth LOP alarm receiving the triggering of downlink optical fiber fault from the first light mouth, the first physical control word is constructed according to the RRU number that the second light mouth redefined controls, and send from the second light mouth, the RRU of clock switching and described second light mouth link re-establishment have been carried out in instruction;
Described unit II, for after the light mouth LOP alarm receiving the triggering of uplink optical fibers fault from the first light mouth, construct the second physical control word according to the RRU number that the first light mouth redefined controls, and send from described first light mouth, the RRU that non-first light mouth is controlled carries out clock switching; And construct the first physical control word for the RRU number controlled according to the second light mouth redefined, and send from described second light mouth, carry out the RRU of clock switching and described second light mouth link re-establishment described in making.
Remote radio unit (RRU) RRU in 16. 1 kinds of annular networking modes, comprises first module, second unit, Unit the 3rd and Unit the 4th, wherein:
Described first module, when the downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, or detecting due to after the luminous power disappearance LOP alarm that optical fiber closure triggers, being switched to second line of a couplet light mouth, and closing transmission optical fiber by clock;
Described second unit, for detecting due to after the LOP alarm that optical fiber closure triggers, reports to baseband processing unit BBU first light mouth step by step by this LOP alarm;
Described Unit the 3rd, for determining that current RRU has carried out clock switching, and receive that described BBU sends from the second light mouth belong to the first physical control word of this RRU process after, with the second light mouth link re-establishment of BBU;
Described Unit the 4th, for receive from current first line of a couplet light mouth at current RRU do not belong to this RRU process physical control word after, control current RRU and carry out clock switching; After carrying out clock switching, after current RRU receives from present clock locking light mouth the physical control word belonging to this RRU process, control current RRU sends physical control word light mouth link re-establishment from present clock locking light mouth and BBU.
17. RRU as claimed in claim 16, is characterized in that: described first module comprises modules A and module B, wherein:
Described modules A, when downlink optical fiber for connecting at current RRU current first line of a couplet light mouth breaks down, judge that current RRU is final stage RRU, then described modules A closes the transmission optical fiber of described current RRU first line of a couplet light mouth, judge that current RRU is non-final stage RRU, then described modules A closes the transmission optical fiber of described current RRU current second line of a couplet light mouth;
Described module B, for detecting due to after the LOP alarm that optical fiber closure triggers, the clock of current RRU is switched to current second line of a couplet light mouth, and judge whether current RRU is final stage RRU, if, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth, if not, then described module B closes the transmission optical fiber of described current RRU current first line of a couplet light mouth and the transmission optical fiber of current second line of a couplet light mouth.
Baseband processing unit BBU in 18. 1 kinds of annular networking modes, comprising: first module, second unit, Unit the 3rd, wherein:
Described first module, for after the light mouth luminous power disappearance LOP alarm receiving the triggering of downlink optical fiber fault from the first light mouth, the first physical control word is constructed according to the remote radio unit (RRU) RRU number that the second light mouth redefined controls, and send from the second light mouth, the RRU of clock switching and described second light mouth link re-establishment have been carried out in instruction;
Described second unit, for after the light mouth LOP alarm receiving the triggering of uplink optical fibers fault from the first light mouth, construct the second physical control word according to the RRU number that the first light mouth redefined controls, and send from described first light mouth, the RRU that non-first light mouth is controlled carries out clock switching; And RRU number structure the 3rd physical control word for controlling according to the second light mouth redefined, and send from described second light mouth, carry out the RRU of clock switching and described second light mouth link re-establishment described in making;
Described Unit the 3rd, its for: from know fiber failure recover after, according to RRU number structure the 3rd physical control word that the second light mouth configured before fiber failure controls, and send from described second light mouth, the RRU that non-second light mouth is controlled carries out clock switching; And RRU number structure the 4th physical control word for controlling according to the first light mouth configured before fiber failure, and send from described first light mouth, carry out the RRU of clock switching and described first light mouth link re-establishment described in making.
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