CN102546344B - link switching method and device - Google Patents
link switching method and device Download PDFInfo
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- CN102546344B CN102546344B CN201110139325.4A CN201110139325A CN102546344B CN 102546344 B CN102546344 B CN 102546344B CN 201110139325 A CN201110139325 A CN 201110139325A CN 102546344 B CN102546344 B CN 102546344B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/437—Ring fault isolation or reconfiguration
Abstract
The invention provides a kind of link switching method and device, wherein, this method includes：When RRU loop network links are normal, the RRU in RRU looped networks receives the delay compensation value of the transmission link of the both direction from BBU；When the chain rupture of RRU loop network links is switched, the delay compensation value in the direction that RRU is used before switching is switched to switch after the delay compensation value in another direction that uses.The present invention solves the problems, such as when there is link switchover can not to ensure in the prior art that business runs without interruption, and ensure that the uninterrupted operation of business.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of link switching method and device.
Background technology
Stable network quality is the basic demand to communication, C-RAN (green wireless access network, Clean Radio
Access Network) framework is exactly what is introduced using Logistics networks quality as starting point, and RRU looped network protection technologies are exactly C-
Key technology in RAN frameworks.Under RRU (remote radio unit (RRU), Remote Radio Frequency Unit) looped network, RRU's
Cyclic optical port is adopted using double acquirers to processing and single-shot mechanism, BBU (Base Band Unit, Base Band Unit) cyclic optical port
With the double receipts mechanism of double hairs, so as to ensure in the case of looped network chain rupture, switched by BBU and RRU active and standby optical port, business datum
It can receive and dispatch as usual.Simultaneously as RRU looped networks have a transmission link of both direction, it is necessary to update corresponding during looped network chain rupture
RRU delay compensation value.
In the prior art, if chain rupture occurs for the link of RRU looped networks, when RRU remeasures optical fiber after optical port switching
Prolong and be reported to BBU, then, BBU recalculates delay compensation value and is issued to RRU again, and RRU is fallen using delay compensation value
Setting is changed, so needs to consume a longer time, so as to ensure that business runs without interruption.
The content of the invention
It is a primary object of the present invention to provide a kind of link switching method and device, at least to solve to exist in the prior art
Occur that the problem of business runs without interruption can not be ensured during link switchover.
According to an aspect of the invention, there is provided a kind of link switching method, including：When RRU loop network links are normal,
RRU in RRU looped networks receives the delay compensation value of the transmission link of the both direction from BBU；In the chain rupture of RRU loop network links and
When being switched, the delay compensation value in the direction that RRU is used before switching is switched to switch after another direction for using
Delay compensation value.
The step of delay compensation value for the transmission link that RRU in RRU looped networks receives the both direction from BBU, includes：
When RRU loop network links are normal, BBU receives the device time delay for the RRU that RRU is reported；BBU is according to RRU device time delay and inspection
The delay compensation value of the transmission link of the fiber link time-delay calculation both direction measured；BBU is by the transmission link of both direction
Delay compensation value be sent to RRU.
The step of device time delay for the RRU that BBU receptions RRU is reported, includes：RRU reports device time delay when upper electric
BBU。
The step of delay compensation value for the transmission link that RRU in RRU looped networks receives the both direction from BBU, includes：
If delay compensation value changes, the delay compensation value after change is sent to RRU by BBU.
RRU detects whether RRU looped networks link chain rupture occur by solidifying detection program within hardware.
When whether RRU link chain rupture occurs by the detection program solidified within hardware to detect RRU looped networks, link falls
Changing method also includes：BBU detects whether RRU looped networks link chain rupture occur by solidifying detection program within hardware；If BBU
There is link chain rupture in detection RRU looped networks, then BBU carries out switching for the optical port of itself.
Delay compensation value includes the delay compensation value of different optical ports, wherein, the direction that RRU is used before switching when
Prolong offset be switched to switch after use another direction delay compensation value the step of include：After RRU determines link switchover
Used optical port；RRU carries out switching time delay setting using delay compensation value corresponding to optical port；RRU is set according to time delay is switched
Carry out link switchover.
According to another aspect of the present invention, there is provided a kind of link switchover device, on RRU, the link switchover device
Including：Transmission unit, mended for receiving the time delay of transmission link of the both direction from BBU when RRU loop network links are normal
Repay value；Switch unit, the time delay in a direction for being used before being switched when the chain rupture of RRU loop network links is switched are mended
Repay value be switched to switch after the delay compensation value in another direction that uses.
Link switchover device also includes：Detection unit, for being detected by the detection program being solidificated in RRU hardware
Whether RRU looped networks there is link chain rupture.
Transmission unit includes：Sending module, for device time delay to be reported into BBU when upper electric；Receiving module, for
The delay compensation value of the transmission link of the both direction from BBU is received when RRU loop network links are normal, wherein, delay compensation value
Obtained by BBU according to RRU device time delay and the fiber link time-delay calculation detected.
The invention has the advantages that：
(1) by the way that the delay compensation value for link switchover is sent into RRU before link chain rupture, so as to which chain occur
Road need not spend the time to recalculate and transmit delay compensation value when switching, but can directly use delay compensation
Value is switched, this ensure that the uninterrupted operation of business, business can not be ensured not in the presence of prior art by solving
The problem of intermitten service；
(2) present invention greatly reduces by way of RRU automatic detections and switchover mode replace artificial detection and switched
It was found that chain rupture and repairing the time of network；
(3) present invention is replaced the mode of application software timing detection by RRU and BBU itself firmware detection, is avoided same
Message flow interaction between one veneer and different veneers, shortens interaction time；
(4) present invention improves network by the way of the common detections of BBU and RRU rather than the single detections of BBU or RRU
Sensitivity, realize being switched fast during chain rupture.
Under the scene of RRU looped network chain ruptures, the present invention using BBU and RRU firmwares Autonomous test, switch certainly by the way of, will break
Chain switches work and is transferred to firmware completion, in the case of firmware workload is not almost increased, greatly reduces software
Difficulty and complexity are realized, while quality of service is ensured, the construction cycle is shortened, reduces development cost, reach smooth
The purpose of transition.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of preferred flow charts of link switching method according to embodiments of the present invention；
Fig. 2 is the schematic diagram of link switchover scheme according to embodiments of the present invention；
Fig. 3 is optical-fiber time-delay schematic diagram according to embodiments of the present invention；
Fig. 4 is that optical-fiber time-delay according to embodiments of the present invention detects and Stored Procedure figure；
Fig. 5 is RRU looped network state diagrams according to embodiments of the present invention；
Fig. 6 is that schematic diagram is switched in RRU looped network chain ruptures according to embodiments of the present invention；
Fig. 7 is a kind of preferred structure figure of link switchover device according to embodiments of the present invention.
Embodiment
Embodiment 1
Fig. 1 is a kind of preferred flow charts of link switching method according to embodiments of the present invention, and it comprises the following steps：
S102, when RRU loop network links are normal, the RRU in RRU looped networks receives the chain of the both direction from BBU
The delay compensation value on road；
S104, when the chain rupture of RRU loop network links is switched, the time delay in the direction that RRU is used before switching is mended
Repay value be switched to switch after the delay compensation value in another direction that uses.
In this preferred embodiment, by the way that the delay compensation value for link switchover is sent to before link chain rupture
RRU, so as to when link switchover occurs the time be spent to recalculate and transmit delay compensation value, but directly
It can be switched using delay compensation value, this ensure that the uninterrupted operation of business, in the presence of solving prior art
Can not ensure business run without interruption the problem of.
The invention provides a kind of transmission method of preferable delay compensation value, specifically, the RRU in RRU looped networks connects
The step of delay compensation value for receiving the transmission link of the both direction from BBU, includes：When RRU loop network links are normal, BBU connects
Receive the device time delay for the RRU that RRU is reported；BBU is according to RRU device time delay and the fiber link time-delay calculation two detected
The delay compensation value of the transmission link in direction；The delay compensation value of the transmission link of both direction is sent to RRU by BBU.
The step of being reported the invention provides a kind of preferable device time delay, specifically, BBU receives the RRU that RRU is reported
Device time delay the step of include：Device time delay is reported BBU when upper electric by RRU.
The step of delay compensation value for the transmission link that RRU in RRU looped networks receives the both direction from BBU, includes：
If delay compensation value changes, the delay compensation value after change is sent to RRU by BBU.
Delay compensation value includes the delay compensation value of different optical ports, wherein, the direction that RRU is used before switching when
Prolong offset be switched to switch after use another direction delay compensation value the step of include：After RRU determines link switchover
Used optical port；RRU carries out switching time delay setting using delay compensation value corresponding to optical port；RRU is set according to time delay is switched
Carry out link switchover.
For the link switching method shown in Fig. 1, the present invention further provides a kind of specific preferred scheme, such as Fig. 2 institutes
Show.Link switching method is detected by optical-fiber time-delay and switches three modules with storage, time delay setting and chain rupture and form, and is specifically included：
As optical-fiber time-delay detection RRU corresponding with positive and negative two links of memory module measurement optical-fiber time-delay value, by time delay setup module
Time delay setting is carried out, the detection of module progress chain rupture is switched by chain rupture and controls the switching of active and standby optical port and time delay.As shown in Figure 2
Link switching method specifically comprise the following steps：
(1) device time delay is reported from RRU to BBU, BBU passes through loopback detection after electricity on BBU and each RRU of looped network are normal
Measure optical-fiber time-delay and combine the optical-fiber time-delay value of positive and negative two links of device time-delay calculation.Certainly, device is reported when upper electric
Time delay, this is a kind of example of the present invention, when RRU of the invention can also report device at the time of other links are normal
Prolong.
Then, optical-fiber time-delay detection with memory module by the optical-fiber time-delay value calculated be stored in DBS (Database Systems,
DataBase System) in.
(2) after RRU optical-fiber time-delay value is stored into DBS, optical-fiber time-delay detection will calculate the RRU two with memory module
The optical-fiber time-delay offset in individual direction is simultaneously handed down to the RRU.Time delay setup module according to the activestandby states of the current optical ports of the RRU,
The delay compensation value in some direction is selected to be configured, delay compensation comes into force.
(3) the Link State detection that module is responsible for BBU and RRU is switched in chain rupture, when detecting that loop network link disconnects, is switched
BBU and RRU active and standby optical port, and switch the delay compensation value of RRU respective directions.Here, delay compensation value includes not sharing the same light
The delay compensation value of mouth, wherein, RRU is included using the step of delay compensation value progress link switchover：After RRU determines link switchover
Used optical port；RRU carries out switching time delay setting using delay compensation value corresponding to optical port；RRU is set according to time delay is switched
Carry out link switchover.
In an embodiment of the present invention, whether RRU can detect RRU looped networks by solidifying detection program within hardware
There is link chain rupture.In this preferred embodiment, application software is replaced to detect by RRU itself firmware detection, and it is this
The detection mode of firmware can detect Link State using the detection frequency higher than application software, so as to avoid same veneer
And the message flow interaction between different veneers, interaction time is shortened, in the case of firmware workload is not almost increased,
Greatly reduce software realizes difficulty and complexity, while quality of service is ensured, shortens the construction cycle, reduces out
Cost is sent out, reaches the purpose seamlessly transitted.
Further, detect whether RRU looped networks link chain rupture occur by solidifying detection program within hardware in RRU
When, link switching method also includes：BBU detects whether RRU looped networks link occur by solidifying detection program within hardware
Chain rupture；If link chain rupture occur in BBU detection RRU looped networks, BBU carries out switching for the optical port of itself.This preferred embodiment is adopted
With BBU and RRU modes of detection rather than the single detections of BBU or RRU jointly, the sensitivity of network is improved, when realizing chain rupture
It is switched fast.
It is described in detail each processing procedure shown in Fig. 2 below in conjunction with the accompanying drawings.
1) optical-fiber time-delay detection and storage
Optical-fiber time-delay is made up of time delay two parts in the device time delay on RRU and the optical fiber between RRU and BBU.Such as Fig. 3 institutes
Show, positive device time delay be each nodes of RRU to its main light port time delay (A11, A12, A13, A14, A15 in such as RRU#1 when
Prolong)；Inverted device time delay be each nodes of RRU to its spare optical port time delay (such as A21, A22, A23, A24, A25 in RRU#2
Time delay)；Fiber link time delay be BBU optical ports to the fiber link between RRU and each RRU time delay (such as B1, B2, B3, B4
Time delay)；Forward link time delay is the time delay (such as P1 and Ant1 time delay) of each RRU antenna openings and BBU main light ports；During reverse link
Prolong the time delay (such as P2 and Ant2 time delay) for each RRU antenna openings and BBU spare optical ports.
In the RRU chain ruptures of looped network, if remeasuring optical-fiber time-delay after optical port switching and being reported to BBU, then count again
Offset is calculated and has been issued to RRU and sets and come into force, it is necessary to consume a longer time, can not ensure that business runs without interruption.Therefore, need
The optical-fiber time-delay of positive and negative two transmission links is measured in RRU initial power-ons.
Optical-fiber time-delay detection is reported with memory module by device time delay on RRU, BBU calculates optical-fiber time-delay, optical-fiber time-delay is deposited
Storage and optical-fiber time-delay compensation value calculation simultaneously issue four sub- module compositions, as shown in Figure 4.
The upper device time delays of RRU report：After the upper electricity of RRU enters idle condition, its device delay parameter is reported to BBU.
BBU calculates optical-fiber time-delay：The veneer (such as light-emitting window interface board) that BBU is responsible for time delay detection is surveyed according to loopback detection
The optical-fiber time-delay value of time delay and combination positive and negative two links of its device time-delay calculation RRU on certain RRU of amount optical fiber, full
During the condition reported enough, BBU master control veneer is reported.
Optical-fiber time-delay stores：When master control veneer receives the optical-fiber time-delay reported, optical-fiber time-delay value is stored in DBS.
Optical-fiber time-delay compensation value calculation：After time delay change, optical-fiber time-delay compensation value calculation module will calculate the optical fiber of the RRU
Delay compensation value, and it is sent to the RRU.
2) time delay is set
Time delay is arranged under two scenes and carried out：After RRU Delay Variations time delay renewal and RRU chain ruptures switch after when
Prolong switching.
Time delay renewal after RRU Delay Variations：When RRU initial power-ons or because the reasons such as optical fiber shake cause time delay to become
During change, its time delay value can report BBU, and BBU is stored and calculated its delay compensation.When RRU receives the both direction of BBU calculating
After new delay compensation value, time delay setup module can set the offset according to the activestandby state of current optical port, mend time delay
Repay and come into force.
Time delay after RRU chain ruptures are switched switches：When RRU chain ruptures and after active and standby optical port is switched, it is necessary to on other direction
Offset resets its delay compensation.For example if during certain RRU normal operation of looped network, its main light port is optical port 0,
Positive delay compensation value, when No. 0 optical port chain rupture of the RRU, its main light port switches to No. 1 optical port, then need with it is reverse when
Prolong value to compensate.To ensure being switched fast for time delay, time delay when switching is set to be completed by firmware.
3) chain rupture is switched
The Link State of RRU looped networks can be divided into normal and chain rupture two states, the normal looped network and chain rupture ring seen in Fig. 5
Net.Chain rupture looped network can be divided into two kinds of situations again：Uplink/downlink (preceding reverse) optical fiber chain rupture (chain rupture point 1 and 2 in figure) and RRU devices
Part chain rupture is the chain rupture (chain rupture point 3 in figure) that RRU physical hardwares reason triggers.
It can not all meet quickly to switch due to detecting or being unilaterally uniformly controlled by BBU/RRU using application software timing
Requirement, therefore, the present invention using BBU and RRU firmwares Autonomous test, switch certainly by the way of, realize network during RRU looped network chain ruptures
Adaptively and seamlessly transit.
RRU looped network chain ruptures are switched as shown in fig. 6, with reference to Fig. 5：When chain rupture between RRU#2 and RRU#3, RRU#2 passes through
LOOPTEST detects the open circuit of its forward link, because RRU#2 is located at BBU main light ports (P1 mouths) side of chain rupture point, therefore nothing
It need to switch (RRU#1 is similar)；RRU#3 can detect its reverse link chain rupture by LOOPTEST, because RRU#3 is located at chain rupture
BBU spare optical ports (P2 mouths) side of point, it is therefore desirable to switch, now, optical port is initiated by the RRU firmwares and switched, standby light originally
Mouth is switched to be switched as spare optical port for main light port, main light port originally (RRU#4 is similar).When BBU main light ports are examined by LOOPTEST
When measuring RRU looped networks has chain rupture, do not switch optical port；When BBU spare optical ports detect that RRU looped networks have chain rupture by LOOPTEST,
Switching spare optical port is main light port.The chain rupture mesh portion that link after the completion of switching is shown in Fig. 5.After the completion of RRU optical port is switched,
By the use of the original issued, reversely delay compensation value as new delay compensation value, is reset RRU firmwares.Fallen when institute is in need
After the completion of the RRU changed is switched, loop network link is again introduced into stable state.Because whole process is without manual intervention, all by breaking
The firmware that chain switches module is automatically performed, and reduces switching time to greatest extent, and user is not felt by the interruption of business, so as to
Realize network self-adapting and seamlessly transit.
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail：
As shown in figure 5, the looped network of 4 RRU compositions of configuration, is only configured corresponding on some RRU (RRU#2 or RRU#3)
Sector, configuration P1 is main light port, and P2 is spare optical port.
After each veneers of BBU, each RRU all normally upper electricity, RRU reports its device time delay.BBU receives RRU device time delay
Afterwards, calculate its optical-fiber time-delay and be stored in database.Meanwhile calculate the optical-fiber time-delay offset of the RRU and be handed down to this
RRU。
When RRU receives the optical-fiber time-delay compensation that BBU is sent, forwards/reverse time delay is selected to mend according to RRU optical ports activestandby state
Repay and be configured.Now, can normally get through.
In the case of normal talking, the scene of the optical fiber chain rupture between RRU#2 and RRU#3 is manufactured.Now RRU#3,
Spare optical port original RRU#2 is switched as main light port, and original main light port is switched for spare optical port, and using former reversely delay compensation value
Set as new delay compensation value process, BBU spare optical ports switch to main light port, and link-recovery is normal.In whole process, call
It is normally carried out.
Embodiment 2
Fig. 7 is a kind of preferred structure figure of link switchover device according to embodiments of the present invention, and it is located on RRU, the chain
Road changeover apparatus includes：Transmission unit 702, for receiving the transmission of the both direction from BBU when RRU loop network links are normal
The delay compensation value of link；Switch unit 704, transmission unit 702 is connected to, for being fallen in the chain rupture of RRU loop network links
The delay compensation value in the direction used before being switched when changing is switched to switch after the delay compensation in another direction that uses
Value.
In this preferred embodiment, by the way that the delay compensation value for link switchover is sent to before link chain rupture
RRU, so as to when link switchover occurs the time be spent to recalculate and transmit delay compensation value, but directly
It can be switched using delay compensation value, this ensure that the uninterrupted operation of business, in the presence of solving prior art
Can not ensure business run without interruption the problem of.
Transmission unit 702 receives the delay compensation value of the transmission link of the both direction from BBU by following steps：
When RRU loop network links are normal, BBU receives the RRU device time delay that RRU transmission unit 702 reports；BBU is according to RRU device
The delay compensation value of the transmission link of time delay and the fiber link time-delay calculation both direction detected；BBU is by both direction
The delay compensation value of transmission link be sent to RRU.
Preferably, device time delay is reported BBU when upper electric by RRU transmission unit 702.
Preferably, if delay compensation value changes, the delay compensation value after change is sent to RRU transmission list by BBU
Member 702.
Link switchover device also includes：Detection unit 706, switch unit 704 is connected to, for by being solidificated in RRU's
Detection program in hardware detects whether RRU looped networks link chain rupture occur.
When whether RRU link chain rupture occurs by the detection program solidified within hardware to detect RRU looped networks, BBU leads to
The detection program of solidification within hardware is crossed to detect whether RRU looped networks link chain rupture occur；If there is chain in BBU detection RRU looped networks
Road chain rupture, then BBU carry out switching for the optical port of itself.
Transmission unit 702 includes：Sending module 7021, for device time delay to be reported into BBU when upper electric；Receiving module
7022, the delay compensation value of the transmission link for receiving the both direction from BBU when RRU loop network links are normal, wherein,
Delay compensation value is obtained by BBU according to RRU device time delay and the fiber link time-delay calculation detected.
Delay compensation value in this preferred embodiment includes the delay compensation value of different optical ports, so, RRU switch unit
704 carry out link switchover by following steps using delay compensation value：RRU determines used optical port after link switchover；RRU
Carry out switching time delay setting using delay compensation value corresponding to optical port；RRU sets progress link switchover according to time delay is switched.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored
Performed in the storage device by computing device, and in some cases, can be with different from shown in order execution herein
The step of going out or describing, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (6)
- A kind of 1. link switching method, it is characterised in that including：When RRU loop network links are normal, RRU in the RRU looped networks receive the transmission link of the both direction from BBU when Prolong offset；When the RRU loop network links chain rupture is switched, the delay compensation in the direction that the RRU is used before switching Value is switched to switch after the delay compensation value in another direction that uses；Wherein, the RRU in the RRU looped networks receives the step of delay compensation value of the transmission link of the both direction from BBU Including：When RRU loop network links are normal, the BBU receives the device time delay for the RRU that the RRU is reported；The BBU roots According to the RRU device time delay and the described two directions of fiber link time-delay calculation detected transmission link time delay mend Repay value；The delay compensation value of the transmission link in described two directions is sent to the RRU by the BBU；The delay compensation value includes the delay compensation value of different optical ports, wherein, the direction that the RRU is used before switching Delay compensation value be switched to switch after use another direction delay compensation value the step of include：The RRU determines chain Road used optical port after switching；The RRU carries out switching time delay setting using delay compensation value corresponding to the optical port；It is described RRU sets progress link switchover according to time delay is switched；The RRU detects whether the RRU looped networks link chain rupture occur by solidifying detection program within hardware.
- 2. according to the method for claim 1, it is characterised in that the BBU receives the device for the RRU that the RRU is reported The step of part time delay, includes：The device time delay is reported the BBU when upper electric by the RRU.
- 3. according to the method for claim 1, it is characterised in that the RRU in the RRU looped networks receives two from BBU The step of delay compensation value of the transmission link in direction, includes：If the delay compensation value changes, the delay compensation value after change is sent to the RRU by the BBU.
- 4. according to the method for claim 1, it is characterised in that in the RRU by solidifying detection program within hardware When whether there is link chain rupture to detect the RRU looped networks, in addition to：The BBU detects whether the RRU looped networks link chain rupture occur by solidifying detection program within hardware；If the BBU, which detects the RRU looped networks, link chain rupture occurs, the BBU carries out switching for the optical port of itself.
- A kind of 5. link switchover device, on RRU, it is characterised in that including：Transmission unit, the delay compensation of the transmission link for receiving the both direction from BBU when RRU loop network links are normal Value；Switch unit, for a direction being used before being switched when the RRU loop network links chain rupture is switched when Prolong offset be switched to switch after the delay compensation value in another direction that uses；Wherein, transmission unit is additionally operable to the RRU when RRU loop network links are normal, reported to the BBU device time delay, The BBU is received according to described two directions of the device time delay of the RRU and the fiber link time-delay calculation detected The delay compensation value of transmission link；The switch unit is additionally operable to used optical port after determination link switchover；Use delay compensation value corresponding to the optical port Carry out switching time delay setting；According to time delay is switched, progress link switchover is set, wherein, the delay compensation value includes different optical ports Delay compensation value；Wherein, described device also includes：Detection unit, for being examined by the detection program being solidificated in the hardware of the RRU Survey whether the RRU looped networks link chain rupture occur.
- 6. device according to claim 5, it is characterised in that transmission unit includes：Sending module, for the device time delay to be reported into the BBU when upper electric；Receiving module, the delay compensation of the transmission link for receiving the both direction from BBU when RRU loop network links are normal Value, wherein, the delay compensation value is by the BBU according to the device time delay of the RRU and the fiber link time delay detected It is calculated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110139325.4A CN102546344B (en) | 2011-05-26 | 2011-05-26 | link switching method and device |
| PCT/CN2012/075968 WO2012159570A1 (en) | 2011-05-26 | 2012-05-23 | Link switchover method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110139325.4A CN102546344B (en) | 2011-05-26 | 2011-05-26 | link switching method and device |
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| Publication Number | Publication Date |
|---|---|
| CN102546344A CN102546344A (en) | 2012-07-04 |
| CN102546344B true CN102546344B (en) | 2017-12-26 |
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| CN201110139325.4A Active CN102546344B (en) | 2011-05-26 | 2011-05-26 | link switching method and device |
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| CN (1) | CN102546344B (en) |
| WO (1) | WO2012159570A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4057710A4 (en) * | 2019-11-07 | 2023-07-12 | Ntt Docomo, Inc. | Communication device |
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| CN105792236B (en) * | 2014-12-26 | 2021-01-26 | 中兴通讯股份有限公司 | Time delay obtaining method and device, baseband unit and communication system |
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| WO2012159570A1 (en) | 2012-11-29 |
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