CN103188712B - Distributed base station redundancy overlay network system and the method for wireless signal processing - Google Patents
Distributed base station redundancy overlay network system and the method for wireless signal processing Download PDFInfo
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Abstract
The invention discloses a kind of method that distributed base station redundancy overlay network system and wireless signal are handled, the system includes primary BBU, standby BBU and at least two RRU chains, primary BBU is connected with least two RRU chains, for carrying out Base-Band Processing to wireless signal, generates baseband signal；Standby BBU is connected with least two RRU chains, for taking over primary BBU generations baseband signal when primary BBU breaks down；Every RRU chain at least two RRU chains, one end is connected with main BBU, and the other end is connected with standby BBU, and the transmitting-receiving process for carrying out baseband signal, every RRU chain includes at least one RRU being linked in sequence.It can solve the problem that RRU Single-ring network Scheme Security performances are relatively low and RRU is star-like using the present invention and be connected to the problem of more fiber resource of double BBU schemes needs takes the more optical fiber interface resource of BBU units simultaneously.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of distributed base station redundancy overlay network system, further relate to
A kind of method for carrying out wireless signal processing using the distributed redundancy overlay network system.
Background technology
GSM-R (Global System for Mobile Communication-Railway, the communication of railway dedicated GSM
System), it is to be based on GSM (Global System for meet the application such as railway dispatching communication and row control Deta bearer
Mobile Communication, global system for mobile communications) wireless communication system technologies exploitation digit wireless communication system.
Due to the application particularity of the railway system, requirements of the GSM-R to system reliability is higher, often requires that any one network node
The normal operation of system can not all be influenceed by breaking down.
In some special screnes, such as tunnel coverage often completes covering using repeater, is equally also required to by some skills
Art redundant measure ensures that any one device node does not influence the normal work of system when breaking down, its schematic diagram such as Fig. 1
It is shown.The repeater of several in Fig. 1 far-end unit (RU) be connected respectively to by way of star-like connection left side and right side it is near
End unit (MU), near-end unit is connected respectively to two different information source base stations (BTS).Meanwhile, the antenna opening of repeater passes through
Leaky cable (or antenna) FD feed of power splitter respectively to the left with right side.So, when certain information source base station, near-end machine event
During barrier, still repeater far-end unit offer signal can be given by another information source base station and near-end machine；When the event of some remote termination
During barrier, it still can provide signal for the leaky cable of common sections by the adjacent left side of the remote termination and far right end machine and cover,
So as to ensure that the reliability of system.
Sizable application with distributed base station and a variety of advantages relative to repeater, also may be used in GSM-R networkings
To replace traditional base station and repeater using distributed base station.
So-called distributed base station, refers to and traditional base station is divided into Remote Radio Unit (Radio Remote Unit, RRU)
With Base Band Unit (Base Band Unit, BBU), BBU is responsible for completing the baseband processing portion of wireless signal, and RRU is responsible for completion
Frequency-variable Modulation and the signal amplification of baseband signal, are connected with optical fiber by standard interface, complete digital baseband signal between the two
Transmission.During networking, several independent radio frequency remote unit RRUs can be zoomed out by optical fiber；Between BBU and RRU
Topologic network mode in addition to traditional star-like connected mode, cascade network mode and annular networking mode are also supported extensively.
Need also exist for considering similar Fig. 1 solutions when replacing traditional integrated base station or repeater using distributed base station
Redundant cover problem certainly, to realize individual node (BBU, RRU, BBU and RRU connection optical fiber, RRU connect antenna-feedback system etc.)
System still is able to provide normal business during failure.
Realize that the major programme of redundant cover includes using distributed base station at present：
(1) RRU Single-ring networks scheme
As shown in Fig. 2 all RRU are connected to same BBU equipment by annular on-link mode (OLM), so when some RRU events
Remain able to ensure remaining RRU normal works during barrier to ensure the covering of coverage, or when certain section of light of middle connection
RRU still may be coupled to BBU and carry out normal work when fibre is interrupted.
The shortcoming of RRU Single-ring network schemes is that, when BBU breaks down, all RRU are by cisco unity malfunction, i.e. safety
Performance is relatively low.
(2) RRU is star-like is connected to double BBU schemes
The problem of in order to solve above-mentioned BBU Single Point of Faliures, scheme as shown in Figure 3 can be used, RRU uses star-like mode
2 BBU are connected, the program is similar with previously mentioned repeater scheme, and when some BBU failure, all RRU may be coupled to
The BBU of another backup works on.When some RRU failure, still can be by the left side adjacent RRU and right side RRU
The leaky cable of common sections provides signal covering；So as to ensure that the reliability of system.But, in the program, because RRU is used
Star-like connected mode is connected to BBU, it is therefore desirable to which more fiber resource takes the more optical fiber interface money of BBU units simultaneously
Source.
Double BBU scheme needs are connected to for RRU Single-ring networks Scheme Security performance in correlation technique is relatively low and RRU is star-like
The problem of more fiber resource takes the more optical fiber interface resource of BBU units simultaneously, not yet proposes effective solve at present
Scheme.
The content of the invention
It is connected to double BBU schemes for RRU Single-ring network Scheme Security performances are relatively low and RRU is star-like and needs more optical fiber
The problem of resource takes the more optical fiber interface resource of BBU units simultaneously, covers the invention provides a kind of distributed base station redundancy
Lid network system and the method for wireless signal processing, at least to solve the above problems.
According to an aspect of the invention, there is provided a kind of distributed base station redundancy overlay network system, including primary base
Tape cell BBU, standby BBU and at least two radio frequency remote unit RRU chains, wherein：The primary BBU, with described at least two
Bar RRU chains are connected, and for carrying out Base-Band Processing to wireless signal, generate baseband signal；The standby BBU, with described at least two
Bar RRU chains are connected, and the baseband signal is generated for taking over the primary BBU when the primary BBU breaks down；It is described extremely
Every RRU chain in few two RRU chains, one end is connected with the main BBU, and the other end is connected with the standby BBU, for carrying out
The transmitting-receiving process of the baseband signal, wherein, every RRU chains include at least one RRU being linked in sequence.
It is preferred that, all RRU space crossings at least two RRU chains are installed, respectively positioned at different RRU chains,
Adjacent RRU is used for the shared leaky cable of the radiofrequency signal feed-in simultaneously of the adjacent RRU two-by-two two-by-two.
It is preferred that, the primary BBU includes：First detection module, for detect all RRU link connection state and/
Or working condition；First processing module, when being broken down for detecting at least one RRU, controls the adjacent of failure RRU both sides
RRU covers the overlay area of the failure RRU by the shared leaky cable；Second processing module, for detect to
When few one section of RRU link connection is interrupted, barrier RRU links can not be adjacent with the primary BBU RRU both sides being connected for some reason for control
RRU, the overlay area that can not be with the primary BBU RRU being connected is covered by the shared leaky cable.
It is preferred that, the standby BBU includes：Second detection module, for detect all RRU link connection state and/
Or working condition；3rd processing module, when being broken down for detecting at least one RRU, controls the adjacent of failure RRU both sides
RRU covers the overlay area of the failure RRU by the shared leaky cable；Fourth processing module, for detect to
When few one section of RRU link connection is interrupted, barrier RRU links can not be adjacent with the primary BBU RRU both sides being connected for some reason for control
RRU, the overlay area that can not be with the primary BBU RRU being connected is covered by the shared leaky cable.
It is preferred that, the standby BBU also includes：3rd detection module, the working condition for detecting the primary BBU；
Replacement module, the baseband signal is generated for taking over the primary BBU when the primary BBU failures.
Entered according to another aspect of the present invention there is provided a kind of using above-mentioned distributed base station redundancy overlay network system
The method of row wireless signal processing, including：Primary Base Band Unit BBU carries out Base-Band Processing to wireless signal, generates baseband signal,
The baseband signal is sent at least two radio frequency remote unit RRU links being connected with the main BBU, by described at least two
RRU on bar RRU links carries out the transmitting-receiving process of the baseband signal, wherein, it is suitable that every RRU chains include at least one
The RRU of sequence connection；When the primary BBU breaks down, standby BBU takes over the primary BBU, generates the baseband signal,
The baseband signal is sent at least two radio frequency remote unit RRU links described in being connected with the standby BBU, by it is described extremely
RRU on few two RRU links carries out the transmitting-receiving process of the baseband signal.
It is preferred that, all RRU space crossings at least two RRU chains are installed, respectively positioned at different RRU chains,
Adjacent RRU is by the shared leaky cable of the radiofrequency signal feed-in simultaneously of the adjacent RRU two-by-two two-by-two.
It is preferred that, the RRU at least two RRU links carries out the transmitting-receiving process of the baseband signal, including：It is described
Primary BBU detects all RRU link connection state and/or working condition；When detecting at least one RRU and breaking down, institute
The adjacent R RU for stating primary BBU control failure RRU both sides covers the covering of the failure RRU by the shared leaky cable
Region；When detecting at least one section RRU link connections interruption, barrier RRU links can not be with the master for some reason for the primary BBU controls
The adjacent R RU of the RRU both sides connected with BBU, can not connect by the way that the shared leaky cable covering is described with the primary BBU
The RRU connect overlay area.
It is preferred that, the primary BBU detects all RRU link connection state and/or work by heartbeat detection mode
State.
It is preferred that, the standby BBU takes over the primary BBU, and the RRU at least two RRU links carries out institute
The transmitting-receiving process of baseband signal is stated, including：The standby BBU detects all RRU link connection state and/or working condition；
When detecting at least one RRU and breaking down, the adjacent R RU of the standby BBU control failure RRU both sides passes through described shared
Leaky cable covers the overlay area of the failure RRU；When detecting at least one section RRU link connections interruption, the standby BBU
The control adjacent R RU that barrier RRU links can not be with the primary BBU RRU both sides being connected for some reason, shared electricity is sewed by described
Cable covering the overlay area that can not be with the primary BBU RRU being connected.
It is preferred that, the standby BBU detects all RRU link connection state and/or work by heartbeat detection mode
State.
It is preferred that, when the primary BBU breaks down, standby BBU takes over the primary BBU, including：It is described standby
BBU detects the working condition of the primary BBU by heartbeat detection mode, takes over described primary when the primary BBU failures
BBU。
In embodiments of the present invention there is provided standby BBU, primary BBU can be taken over when primary BBU breaks down, is carried
The high security performance of work, therefore, it is possible to solve the technical problem of RRU Single-ring network schemes：It is all when BBU breaks down
RRU is relatively low by cisco unity malfunction, i.e. security performance.In addition, distributed base station redundant cover provided in an embodiment of the present invention
RRU is linked in sequence composition RRU chains in network system, and includes at least two RRU chains within the system, by every RRU chain with
Active and standby BBU is connected, it is necessary to less optical fiber money for all RRU are connected to active and standby BBU using star-like connected mode
The optical fiber interface resource taken on source, BBU units is also accordingly reduced.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is traditional repeater redundant cover networking diagram according to correlation technique；
Fig. 2 is the RRU Single-ring network networking diagrams according to correlation technique；
Fig. 3 is the star-like networking diagrams for being connected to double BBU schemes of RRU according to correlation technique；
Fig. 4 is the structural representation of distributed base station redundancy overlay network system according to embodiments of the present invention；
Fig. 5 is primary BBU according to embodiments of the present invention structural representation；
Fig. 6 is standby BBU according to embodiments of the present invention the first structural representation；
Fig. 7 is standby BBU according to embodiments of the present invention second of structural representation；
Fig. 8 is according to embodiments of the present invention to utilize distributed base station redundancy overlay network system to carry out wireless signal processing
Method process chart；
Fig. 9 is the networking schematic diagram of RRU double-strand redundant cover schemes according to embodiments of the present invention.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
Referred in correlation technique, the shortcoming of RRU Single-ring network schemes is that all RRU can not when BBU breaks down
Normal work, i.e. security performance are relatively low.And RRU is star-like is connected to double BBU schemes, because RRU is using the connection of star-like connected mode
To BBU simultaneously, it is therefore desirable to which more fiber resource takes the more optical fiber interface resource of BBU units.
In order to solve the above technical problems, the embodiments of the invention provide a kind of distributed base station redundancy overlay network system,
Its structural representation as shown in figure 4, including primary BBU 401, standby BBU 402 and at least two RRU chains 403, wherein：
Primary BBU 401, is connected with least two RRU chains 403, for carrying out Base-Band Processing to wireless signal, generates base
Band signal；
Standby BBU 402, is connected with least two RRU chains 403, for taking over master when primary BBU 401 breaks down
Baseband signal is generated with BBU 401；
Every RRU chain 403 at least two RRU chains, one end is connected with main BBU 401, the other end and standby BBU 402
Connection, the transmitting-receiving process for carrying out baseband signal, wherein, every RRU chain includes at least one RRU being linked in sequence.
In embodiments of the present invention there is provided standby BBU, primary BBU can be taken over when primary BBU breaks down, is carried
The high security performance of work, therefore, it is possible to solve the technical problem of RRU Single-ring network schemes：It is all when BBU breaks down
RRU is relatively low by cisco unity malfunction, i.e. security performance.In addition, distributed base station redundant cover provided in an embodiment of the present invention
RRU is linked in sequence composition RRU chains in network system, and includes at least two RRU chains within the system, by every RRU chain with
Active and standby BBU is connected, it is necessary to less optical fiber money for all RRU are connected to active and standby BBU using star-like connected mode
The optical fiber interface resource taken on source, BBU units is also accordingly reduced.
In distributed base station redundancy overlay network system provided in an embodiment of the present invention, the institute at least two RRU chains
There is the installation of RRU space crossings, be used for respectively positioned at different RRU chains, adjacent two-by-two RRU by RRU adjacent two-by-two radio frequency
The shared leaky cable of signal feed-in simultaneously.All RRU in each RRU chains are in the way of " the common logic districts of many RRU "
It is operated, i.e., all RRU are all connected to same BBU, BBU sends identical digital baseband signal to institute by optical fiber
There is RRU, all RRU cause all RRU antenna openings to send identical wireless signal by identical Frequency-variable Modulation, up
Direction is then handled by the way of base band data merging, and so all RRU logically constitute same cell, wirelessly
Terminal will not switch when being moved between each RRU, improve the impression experience of user.For prevent it is single-stranded in the case of RRU
The fiber break connected between failure or RRU causes " the common logic districts of many RRU " scheme not implement, therefore at least provided with two
RRU chains, and this two RRU chains are connected respectively to primary BBU and standby BBU.
In a preferred embodiment, primary BBU detects the working condition and Link State of whole RRU chains, if hair
Raw failure is then carried out to it to carrying out structuring explanation in primary BBU in respective handling, this example, and its structural representation refers to figure
5, and realize detection and consequent malfunction processing using each module in Fig. 5.As shown in figure 5, primary BBU can include：
First detection module 501, link connection state and/or working condition for detecting all RRU；
First processing module 502, is coupled with first detection module 501, is broken down for detecting at least one RRU
When, the adjacent R RU of control failure RRU both sides covers failure RRU overlay area by shared leaky cable；
Second processing module 503, is coupled with first detection module 501, for detecting at least one section RRU link connection
When disconnected, control hinders the adjacent R RU for the RRU both sides that RRU links can not be connected with primary BBU for some reason, passes through shared leaky cable
Covering can not be with the primary BBU RRU being connected overlay area.Shared leaky cable covering failure RRU overlay area or
Because faulty link can not provide the RRU of signal covering overlay area, it is ensured that the overlay area of signal, user's receptor is improved
Test.
RRU chains break down in the presence of two kinds of situations, and one kind is RRU itself fails, and another is that RRU itself is not sent out
Raw failure, but the link between RRU breaks down, i.e. link down, therefore, the first processing are provided for different failures
Module and Second processing module, are handled it respectively.
Not only include RRU, in addition to BBU in distributed base station redundancy overlay network system, also refer to above, primary BBU
During failure, standby BBU switch taking over primary BBU, it can be seen that, the institute that standby BBU should possess primary BBU is functional.
Therefore, standby BBU can also detect the working condition and Link State of whole RRU chains, and phase is carried out to it if breaking down
It should handle, to carrying out structuring explanation in standby BBU in this example, its structural representation refers to Fig. 6, and utilizes each in Fig. 6
Module realizes detection and consequent malfunction processing.As shown in fig. 6, standby BBU can include：
Second detection module 601, link connection state and/or working condition for detecting all RRU；
3rd processing module 602, is coupled with the second detection module 601, is broken down for detecting at least one RRU
When, the adjacent R RU of control failure RRU both sides covers failure RRU overlay area by shared leaky cable；
Fourth processing module 603, is coupled with the second detection module 601, for detecting at least one section RRU link connection
When disconnected, control hinders the adjacent R RU for the RRU both sides that RRU links can not be connected with primary BBU for some reason, passes through shared leaky cable
Covering can not be with the primary BBU RRU being connected overlay area.
Mentioned above, standby BBU can take over primary BBU in primary BBU failures.For ensure it is that standby BBU starts and
Shi Xing, standby BBU are required to find primary BBU failures in time, therefore, and standby BBU needs to enter primary BBU working condition
Row detection.In a preferred embodiment, now standby BBU is illustrated in a structured manner, i.e. as shown in fig. 7, standby
BBU can also include：
3rd detection module 701, the working condition for detecting primary BBU；
Replacement module 702, is coupled with the 3rd detection module 701, for taking over primary BBU generations when primary BBU failures
Baseband signal.
Based on same inventive concept, the embodiment of the present invention additionally provides what a kind of above-mentioned any preferred embodiment of utilization was provided
Distributed base station redundancy overlay network system carry out wireless signal processing method, its process chart as shown in figure 8, including：
Step S802, primary BBU to wireless signal carry out Base-Band Processing, generate baseband signal, by baseband signal send to
At least two RRU links being connected with main BBU, the RRU at least two RRU links carries out the transmitting-receiving process of baseband signal,
Wherein, every RRU chain includes at least one RRU being linked in sequence；
Step S804, when primary BBU breaks down, standby BBU takes over primary BBU, generates baseband signal, base band is believed
Number send at least two radio frequency remote unit RRU links be connected with standby BBU, the RRU progress at least two RRU links
The transmitting-receiving process of baseband signal.
In embodiments of the present invention there is provided standby BBU, primary BBU can be taken over when primary BBU breaks down, is carried
The high security performance of work, therefore, it is possible to solve the technical problem of RRU Single-ring network schemes：It is all when BBU breaks down
RRU is relatively low by cisco unity malfunction, i.e. security performance.In addition, distributed base station redundant cover provided in an embodiment of the present invention
RRU is linked in sequence composition RRU chains in network system, and includes at least two RRU chains within the system, by every RRU chain with
Active and standby BBU is connected, it is necessary to less optical fiber money for all RRU are connected to active and standby BBU using star-like connected mode
The optical fiber interface resource taken on source, BBU units is also accordingly reduced.
In a preferred embodiment, all RRU at least two RRU chains need space crossings to install, respectively position
In different RRU chains, adjacent RRU is by the shared leaky cable of RRU adjacent two-by-two radiofrequency signal feed-in simultaneously two-by-two.Often
All RRU in individual RRU chains are operated in the way of " the common logic districts of many RRU ", i.e., all RRU are all connected to together
One BBU, BBU send identical digital baseband signal to all RRU by optical fiber, and all RRU pass through identical frequency conversion
Modulate and cause all RRU antenna openings to send identical wireless signal, up direction is then by the way of base band data merging
Handled, so all RRU logically constitute same cell, will when wireless terminal is moved between each RRU
Do not switch, improve the impression experience of user.For prevent it is single-stranded in the case of the fiber break that is connected between RRU failures or RRU
" the common logic districts of many RRU " scheme is caused not implement, therefore at least provided with two RRU chains, and this two RRU chains are connected respectively
To primary BBU and standby BBU.
During RRU at least two RRU links carries out the transmitting-receiving process of baseband signal, primary BBU is detected always
All RRU link connection state and/or working condition.When detecting at least one RRU and breaking down, primary BBU controls
The adjacent R RU of failure RRU both sides covers failure RRU overlay area by shared leaky cable.When detecting at least one section
When RRU link connections are interrupted, primary BBU controls hinder the adjacent of the RRU both sides that RRU links can not be connected with primary BBU for some reason
RRU, overlay area that can not be with the primary BBU RRU being connected by shared leaky cable covering.Shared leaky cable covering
Failure RRU overlay area or because faulty link can not provide signal covering RRU overlay area, it is ensured that the covering of signal
Region, improves user's impression experience.
Detect that RRU link connection state and/or the detection mode of working condition can have a variety of during implementation, such as timing
Detection mode, then such as signaling feedback detection mode, it is preferred that primary BBU can detect all RRU by heartbeat detection mode
Link connection state and/or working condition.For other detection modes, heartbeat detection mode reads RRU link
The frequency of connection status and/or working condition is higher, so as to ensure higher detection accuracy.
Standby BBU takes over primary BBU, when the RRU at least two RRU links carries out the transmitting-receiving process of baseband signal,
Standby BBU needs persistently to detect all RRU link connection state and/or working condition, occurs when detecting at least one RRU
During failure, the adjacent R RU of standby BBU control failure RRU both sides covers the failure RRU area of coverage by shared leaky cable
Domain；When detecting at least one section RRU link connections interruption, barrier RRU links can not connect with primary BBU for some reason for standby BBU controls
The adjacent R RU of the RRU both sides connect, overlay area that can not be with the primary BBU RRU being connected by shared leaky cable covering.
It is mentioned above, for other detection modes, heartbeat detection mode read RRU link connection state and/
Or the frequency of working condition is higher, so as to ensure higher detection accuracy.Therefore, in a preferred embodiment, it is standby
BBU can also detect all RRU link connection state and/or working condition by heartbeat detection mode.
Likewise, standby BBU can also detect primary BBU working condition by heartbeat detection mode, when primary BBU events
Primary BBU is taken over during barrier.
In summary, the present embodiments relate to one kind railway dedicated mobile communications subsystem GSM-R systems or other
Realized the RRU of several distributed base stations in wireless communication system by communication link protection mode while accessing primary, standby (2
It is individual) BBU, while realized by configuring a plurality of mutually redundant mode of RRU links the node of any one in network (including BBU,
RRU or transmission link) failure that occurs all without the redundant cover scheme of influence wireless network operation, can to lift network
By property.
To carry out nothing by distributed base station redundancy overlay network system provided in an embodiment of the present invention and using the system
The method of line signal transacting becomes apparent from clearer with illustrating, is now illustrated with specific embodiment.
The structural representation of the present embodiment refers to Fig. 9, wherein, several RRU compose in series a RRU by optical fiber
Chain, the two ends of the RRU chains are connected to 2 primary and backup BBU by optical fiber respectively；In such as Fig. 9, RRU1, RRU3, RRU5 group
Into a RRU chain (RRU chain A)；RRU2, RRU4, RRU6 constitute another RRU chain (RRU chain B).
The now annexation to each part of the distributed base station redundancy overlay network system shown in Fig. 9 and work
Principle is illustrated.
All RRU of RRU chain A and RRU chain two chains of B are operated in the way of " the common logic districts of many RRU ", i.e.,
All RRU are all connected to same BBU, and BBU sends identical digital baseband signal to all RRU by optical fiber, own
RRU causes all RRU antenna openings to send identical wireless signal by identical Frequency-variable Modulation, and up direction then uses base
The mode merged with data is handled, and so all RRU can constitute same cell in logic, wireless terminal RRU it
Between will not switch when moving.
In order to prevent it is single-stranded in the case of the fiber break that is connected between RRU failures or RRU cause " many RRU altogether logic district "
Scheme can not be implemented, therefore at least lay 2 independent RRU chains, and the two RRU chains are respectively coupled primary and backup 2
Individual BBU.As in Fig. 9, RRU chain A and RRU chains B is all connected to BBU_A and BBU_B.
Whenever two BBU being connected with RRU chains are operated with active/standby mode, i.e., and only one BBU is in work
State, when the BBU of the work breaks down, then by way of switching, takes over it by other BBU and is operated.
All RRU of the two chains carry out space crossings installation when mounted, i.e., according to RRU1, RRU2, RRU3 ...,
RRU6 order is installed, while sharing leaky cable between adjacent RRU, adjacent R RU radiofrequency signal is fed into simultaneously
Shared leaky cable.As in Fig. 9, shared one section of leaky cable between RRU2 and RRU3, RRU3 and RRU4 share one section and sewed
Cable, RRU4 and RRU5 share one section of leaky cable.
Active and standby two BBU need to have and all RRU carry out the function of " heartbeat detection ", in order to which BBU can obtain institute
Have RRU link connection state or (and) working condition, and link connection state and RRU working condition are switched for BBU
Judging process.
The function with " heartbeat detection " is needed between active and standby two BBU, it is standby to realize when primary BBU failures
BBU can have found in time, so as to start active and standby BBU reversed processes.
By any separate nodes in this programme feasible system (containing BBU, RRU) or single link (containing between RRU
And the optical fiber between RRU and BBU) failure without influence system normal work.
Wireless signal processing is carried out using the distributed base station redundancy overlay network system shown in Fig. 9, realizes that signal is covered
Operation principle it is as follows：
When primary BBU breaks down, standby BBU receive from primary BBU switch order or standby BBU is detected
The information of BBU failures, so as to carry out BBU switching actions, standby BBU is switched to master state, takes over primary BBU work, life
All RRU are made to set up incidence relation with it, and standby BBU carries out the transmitting-receiving process of base band data.
When some RRU breaks down, when only resulting in that RRU3 breaks down in the RRU chain failures belonging to the RRU, such as Fig. 9,
Cause RRU chain A failures, portion of base stations (such as RRU3, RRU5) now on A chains will be unable to be connected to primary BBU (BBU_A) work
Make, but because the RRU of standby RRU chains (RRU chain B) is working properly, 2 now adjacent with failure RRU RRU (RRU2 in Fig. 9
And RRU4) signal can cover the failure RRU overlay area (area in Fig. 9 from RRU2 to RRU4 by sharing leaky cable
Domain).
It is similar with the situation that some RRU sends failure when certain section of optical fiber is interrupted, only result in belonging to the optical fiber
When optical fiber in RRU chain failures, such as Fig. 9 between RRU3 and RRU5 breaks down, cause RRU chain A failures, now the portion on A chains
Point base station (such as RRU5) will be unable to be connected to primary BBU (BBU_A) work, but because the RRU of standby RRU chains (RRU chain B) works
Normally, 2 now adjacent with failure RRU RRU (RRU4 and RRU6 in Fig. 9) signal can by share leaky cable (or
Antenna) cover failure RRU overlay area (region in Fig. 9 from RRU4 to RRU6).
Advantage of this embodiment is that：Not only solve and equipment and transmission link are solved under tunnel redundant cover scene
Single Point of Faliure problem, fiber resource and BBU optical fiber interface resources are wasted while also solving and comparing under the star-like connected modes of RRU
Problem.
As can be seen from the above description, the present invention realizes following technique effect：
In embodiments of the present invention there is provided standby BBU, primary BBU can be taken over when primary BBU breaks down, is carried
The high security performance of work, therefore, it is possible to solve the technical problem of RRU Single-ring network schemes：It is all when BBU breaks down
RRU is relatively low by cisco unity malfunction, i.e. security performance.In addition, distributed base station redundant cover provided in an embodiment of the present invention
RRU is linked in sequence composition RRU chains in network system, and includes at least two RRU chains within the system, by every RRU chain with
Active and standby BBU is connected, it is necessary to less optical fiber money for all RRU are connected to active and standby BBU using star-like connected mode
The optical fiber interface resource taken on source, BBU units is also accordingly reduced.
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 constituted
Network on, alternatively, the program code that they can be can perform with computing device be realized, it is thus possible to they are stored
Performed in the storage device by computing device, and in some cases, can be shown to be performed different from order herein
The step of going out or describe, 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 (10)
1. a kind of distributed base station redundancy overlay network system, it is characterised in that including primary Base Band Unit BBU, standby BBU with
And at least two radio frequency remote unit RRU chains, wherein：
The primary BBU, is connected with least two RRU chains, for carrying out Base-Band Processing, generation base band letter to wireless signal
Number；
The standby BBU, is connected with least two RRU chains, for taking over the master when the primary BBU breaks down
The baseband signal is generated with BBU；
Every RRU chain at least two RRU chains, one end is connected with the main BBU, and the other end connects with the standby BBU
Connect, the transmitting-receiving process for carrying out the baseband signal, wherein, every RRU chains include what at least one was linked in sequence
RRU；
All RRU space crossings at least two RRU chains are installed, respectively positioned at different RRU chains, adjacent two-by-two
RRU is used for the shared leaky cable of the radiofrequency signal feed-in simultaneously of the adjacent RRU two-by-two.
2. system according to claim 1, it is characterised in that the primary BBU includes：
First detection module, link connection state and/or working condition for detecting all RRU；
First processing module, when being broken down for detecting at least one RRU, the adjacent R RU of control failure RRU both sides passes through
The shared leaky cable covers the overlay area of the failure RRU；
Second processing module, for detecting during the interruption of at least one section RRU link connection, barrier RRU links can not be with for some reason for control
The adjacent R RU of the RRU both sides of the primary BBU connections, by the shared leaky cable cover it is described can not be with the master
The RRU connected with BBU overlay area.
3. system according to claim 1, it is characterised in that the standby BBU includes：
Second detection module, link connection state and/or working condition for detecting all RRU；
3rd processing module, when being broken down for detecting at least one RRU, the adjacent R RU of control failure RRU both sides passes through
The shared leaky cable covers the overlay area of the failure RRU；
Fourth processing module, for detecting during the interruption of at least one section RRU link connection, barrier RRU links can not be with for some reason for control
The adjacent R RU of the RRU both sides of the primary BBU connections, by the shared leaky cable cover it is described can not be with the master
The RRU connected with BBU overlay area.
4. the system according to any one of claims 1 to 3, it is characterised in that the standby BBU also includes：
3rd detection module, the working condition for detecting the primary BBU；
Replacement module, the baseband signal is generated for taking over the primary BBU when the primary BBU failures.
5. a kind of distributed base station redundancy overlay network system using described in any one of Claims 1-4 4 carries out wireless signal
The method of processing, it is characterised in that including：
Primary Base Band Unit BBU to wireless signal carry out Base-Band Processing, generate baseband signal, by the baseband signal send to
At least two radio frequency remote unit RRU links of the main BBU connections, the RRU at least two RRU links carries out institute
The transmitting-receiving process of baseband signal is stated, wherein, every RRU chains include at least one RRU being linked in sequence；
When the primary BBU breaks down, standby BBU takes over the primary BBU, the baseband signal is generated, by the base
Band signal is sent at least two radio frequency remote unit RRU links described in being connected with the standby BBU, by described at least two
RRU on RRU links carries out the transmitting-receiving process of the baseband signal；
All RRU space crossings at least two RRU chains are installed, respectively positioned at different RRU chains, adjacent two-by-two
RRU is by the shared leaky cable of the radiofrequency signal feed-in simultaneously of the adjacent RRU two-by-two.
6. method according to claim 5, it is characterised in that the RRU at least two RRU links carries out the base
The transmitting-receiving process of band signal, including：
The primary BBU detects all RRU link connection state and/or working condition；
When detecting at least one RRU and breaking down, the adjacent R RU of the primary BBU control failure RRU both sides passes through described common
Leaky cable covers the overlay area of the failure RRU；
When detecting at least one section RRU link connections interruption, barrier RRU links can not be with the master for some reason for the primary BBU controls
The adjacent R RU of the RRU both sides connected with BBU, can not connect by the way that the shared leaky cable covering is described with the primary BBU
The RRU connect overlay area.
7. method according to claim 6, it is characterised in that the primary BBU detects all by heartbeat detection mode
RRU link connection state and/or working condition.
8. method according to claim 5, it is characterised in that the standby BBU takes over the primary BBU, by it is described extremely
RRU on few two RRU links carries out the transmitting-receiving process of the baseband signal, including：
The standby BBU detects all RRU link connection state and/or working condition；
When detecting at least one RRU and breaking down, the adjacent R RU of the standby BBU control failure RRU both sides passes through described common
Leaky cable covers the overlay area of the failure RRU；
When detecting at least one section RRU link connections interruption, barrier RRU links can not be with the master for some reason for the standby BBU controls
The adjacent R RU of the RRU both sides connected with BBU, can not connect by the way that the shared leaky cable covering is described with the primary BBU
The RRU connect overlay area.
9. method according to claim 8, it is characterised in that the standby BBU detects all by heartbeat detection mode
RRU link connection state and/or working condition.
10. the method according to any one of claim 5 to 9, it is characterised in that standby when the primary BBU breaks down
The primary BBU is taken over BBU, including：The standby BBU detects the work shape of the primary BBU by heartbeat detection mode
State, the primary BBU is taken over when the primary BBU failures.
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| CN103347274B (en) * | 2013-07-04 | 2016-06-22 | 北京邮电大学 | The collocation method of Remote Radio Unit and distributed base station |
| CN103595478A (en) * | 2013-11-01 | 2014-02-19 | 南京泰通科技有限公司 | High-reliability GSM-R digital optical fiber repeater and working method thereof |
| CN104363602A (en) * | 2014-10-16 | 2015-02-18 | 北京交控科技有限公司 | Leaky cable based LTE (long term evolution) wireless signal coverage system in tunnel environment |
| CN104506238A (en) * | 2015-01-07 | 2015-04-08 | Comlab（北京）通信系统设备有限公司 | Analog repeater |
| CN107889118B (en) * | 2017-10-19 | 2020-11-24 | 北京全路通信信号研究设计院集团有限公司 | LTE-R network system with RRU interleaving redundancy |
| CN107733522B (en) * | 2017-10-19 | 2020-12-15 | 北京全路通信信号研究设计院集团有限公司 | LTE-R annular network system |
| CN109699022A (en) * | 2017-10-20 | 2019-04-30 | 普天信息技术有限公司 | A kind of CBTC data transmission method |
| CN107846246B (en) * | 2017-10-27 | 2024-04-05 | 厦门信同信息技术有限公司 | Networking system of optical fiber repeater and synchronization method thereof |
| JP7065619B2 (en) * | 2018-01-16 | 2022-05-12 | 三菱電機株式会社 | Mobile communication system and synchronization control method between base stations |
| CN110071741B (en) * | 2019-04-22 | 2023-09-26 | 厦门信同信息技术有限公司 | Leakage cable detection device utilizing repeater and detection method thereof |
| CN113795003A (en) * | 2021-11-10 | 2021-12-14 | 广东省新一代通信与网络创新研究院 | Multi-RRU (remote radio unit) extension system for 5G indoor wireless communication and implementation method |
| CN114828024A (en) * | 2022-04-22 | 2022-07-29 | 北京全路通信信号研究设计院集团有限公司 | Distributed networking method, device, distributed base station and storage medium |
| CN115460722A (en) * | 2022-09-21 | 2022-12-09 | 中国国家铁路集团有限公司 | 5G-R base station network system |
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