CN104025701B - The indoor distributed system of clock-switching method, device and repeater as relaying - Google Patents
The indoor distributed system of clock-switching method, device and repeater as relaying Download PDFInfo
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- CN104025701B CN104025701B CN201180074855.3A CN201180074855A CN104025701B CN 104025701 B CN104025701 B CN 104025701B CN 201180074855 A CN201180074855 A CN 201180074855A CN 104025701 B CN104025701 B CN 104025701B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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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
Abstract
A kind of indoor distributed system of clock-switching method, device and use repeater as relaying, including：In using indoor distributed system of the repeater as relaying, the data code flow that muti-service access unit MAU is sent is received；According to the data code flow received, judge the reference clock provided by the MAU whether in normal condition；When the reference clock for judging that the MAU is provided is not in normal condition, indicate multi-service expanding element MEU by reference clock that the MAU is provided is used to be switched to the reference clock provided using the MEU itself to carrying out time synchronization between MEU and MRU to carrying out time synchronization between MEU and multi-service remote-end unit MRU.Using the application technique proposed herein scheme, the synchronousness in indoor distributed system between each equipment can be preferably safeguarded, improve the reliability of whole system.
Description
Technical field
The present invention relates to digital high-frequency amplification station technical field, more particularly, to a kind of clock-switching method, device and using straight
Put indoor distributed system of the station as relaying.
Background technology
With the fast development of mobile communication technology, in order to increase the covering of the network signal of mobile communication system indoors
Scope builds the emphasis that indoor distributed system has become the network optimization.In the scheme for building indoor distributed system, lead to
Frequently with repeater as relaying, by the multi-standard mobile communication business data in mobile communication system and indoor distributed system
Other business datums (such as broadband ethernet business datum) in system are transmitted after zooming out together.
As shown in Figure 1, using indoor distributed system of the repeater as relaying, including at least one multi service access list
First (MAU, Multi-service Access Unit), at least one multi-service expanding element (MEU, Multi-service
Extend Unit) and at least one multi-service remote-end unit (MRU, Multi-service Remote Unit).MAU will be received
To the multiple types sent from base station radiofrequency signal, MEU, the slave MAU that MEU will be received are sent to after conversion process
Other business datums are believed in the radiofrequency signal for the multiple types after conversion sent and the indoor covering system received
Number, MRU is sent jointly to after conversion process, MRU is by the mixed signal of the multiple business data received according to a set pattern
It then parses and sends respectively, so as to fulfill the covering of multi-service blended data signal indoors.
In entire indoor distributed system, usually required between each equipment such as MAU, MEU and MRU with identical
Clock source can work normally, i.e., need to set a reference clock in indoor distributed system to ensure between each equipment
Synchronousness.Under normal conditions, when each equipment in entire indoor distributed system is using the clock signal of MAU as benchmark
Clock safeguards the time synchronization between each equipment, i.e. MEU receives the data code flow that MAU is sent, in the data code flow received
In recover clock signal, then using the clock signal recovered as the reference clock information of entire distributed system.But
When MAU occurs power down or breaks down, MEU will be unable to receive the data code flow that MAU is sent, when also can not just recover
Clock signal, so that entire indoor distributed system can be caused to lose clock source, the synchronousness between MEU and MRU is just at this time
It can not establish, the link of a variety of mixed services to work in indoor distributed system is caused to interrupt, can not be user
Offer service is provided.
Due in the prior art there are no propose it is a kind of using repeater as relay indoor distributed system lack
During clock source, it can continue to ensure the processing scheme of the synchronousness in indoor distributed system between each equipment, so as to lead
The reliability for causing entire indoor distributed system is relatively low.
The content of the invention
The embodiment of the present invention provides the indoor distributed system of a kind of method, apparatus and repeater of clock switching as relaying
System, can preferably safeguard the synchronousness in indoor distributed system between each equipment, improve the reliability of whole system.
Technical solution provided in an embodiment of the present invention is as follows：
A kind of clock-switching method, including：In using indoor distributed system of the repeater as relaying, more industry are received
The data code flow that business access unit MAU is sent；According to the data code flow received, the reference clock provided by the MAU is judged
Whether normal condition is in；When the reference clock for judging that the MAU is provided is not in normal condition, instruction multi-service extension
Unit MEU is by using reference clock that the MAU is provided to be cut to carrying out time synchronization between MEU and multi-service remote-end unit MRU
The reference clock provided using the MEU itself is changed to carrying out time synchronization between MEU and MRU.
A kind of clock switching device, including：Code stream receiving unit, for using indoor distribution of the repeater as relaying
In formula system, the data code flow that muti-service access unit MAU is sent is received；Judging unit, for being connect according to code stream receiving unit
Whether the data code flow received judges the reference clock provided by the MAU in normal condition；Clock switch control unit,
For when judging unit judges that the reference clock that the MAU is provided is not in normal condition, indicating multi-service expanding element
MEU is by using reference clock that the MAU is provided to be switched to carrying out time synchronization between MEU and multi-service remote-end unit MRU
The reference clock provided using the MEU itself is to carrying out time synchronization between MEU and MRU.
It is a kind of using repeater as relaying indoor distributed system, including muti-service access unit MAU, multi-service expand
Unit MEU and multi-service remote-end unit MRU is opened up, further includes clock switching device, wherein：The MAU, for sending numeric data code
Stream；The clock switching device, for receiving the data code flow that the MAU is sent；And according to the data code flow received, judge
Whether the reference clock provided by the MAU is in normal condition；It is not in just in the reference clock for judging the MAU offers
During normal state, indicate the MEU by the reference clock of MAU offers is used to be switched to carrying out time synchronization between MEU and MRU
The reference clock provided using the MEU itself is to carrying out time synchronization between MEU and MRU；The MEU, for according to described
The instruction of clock switching device, using the reference clock provided by the MAU or using the reference clock by itself offer to certainly
Time synchronization is carried out between body and MRU.
Based on technical solution set forth above, in using indoor distributed system of the repeater as relaying, judging
Go out when being not in normal condition by the MAU reference clocks provided, instruction MEU is switched to and is made by the reference clock that MAU is used to provide
The reference clock provided with the MEU itself, to realize the synchronousness between MEU and MRU, so as to preferably maintenance room
Synchronousness in interior distributed system between each equipment improves the reliability of whole system.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is in the prior art, using indoor distributed system Organization Chart of the repeater as relaying；
Fig. 2 be the embodiment of the present invention one in, proposition using repeater as relay indoor distributed system Organization Chart；
Fig. 3 is the MEU internal structure composition schematic diagrams of proposition in the embodiment of the present invention one；
Fig. 4 is the clock-switching method flow chart of proposition in the embodiment of the present invention two；
Fig. 5 is in the embodiment of the present invention two, and the multi-signal included in the data code flow sent by MAU of proposition is illustrated
Figure；
Fig. 6 is the clock switching device structure chart of proposition in the embodiment of the present invention two；
Fig. 7 is the clock-switching method flow chart of proposition in the embodiment of the present invention three.
Specific embodiment
For in the prior art when lacking clock source as the indoor distributed system of relaying using repeater,
It can not continue to ensure the synchronousness in indoor distributed system between each equipment so that entire indoor distributed system
The problem of reliability is relatively low, the embodiment of the present invention propose a kind of technical solution of clock switching, are using repeater conduct here
In the indoor distributed system of relaying, according to the data code flow sent by MAU, whether the reference clock provided by MAU is judged
In normal condition, when the reference clock for judging that MAU is provided is not in normal condition, indicate MEU in distributed system into
Row clock switches, and will realize MEU by the reference clock that MAU is provided is used to be switched to the reference clock that MEU itself is used to provide
Time synchronization between MRU can preferably safeguard the synchronousness in indoor distributed system between each equipment, so as to
Improve the reliability of whole system.
Below in conjunction with each attached drawing to the main realization principle of technical solution of the embodiment of the present invention, specific embodiment and
Its advantageous effect corresponding to reach is set forth in.
Embodiment one
The embodiment of the present invention one propose here it is a kind of using repeater as relaying indoor distributed system, including MAU,
MEU, MRU and clock switching device, structure composition is as shown in Fig. 2, wherein：
MAU, for sending data code flow.Wherein, in the downlink, MAU sends data code flow, the numeric data code to MEU
Stream is MAU at least identical standard or radiofrequency signal of different systems is filtered and digital-to-analogue all the way received from base station
Conversion process obtains data service signal, then will treated data service signal, channel associated clock signal and indication signal
According to certain coding mode, the data code flow of formation.Wherein, when channel associated clock signal is for identifying the reference provided by MAU
Clock information, the indoor distributed system using repeater as relaying are under normal operating conditions, general to believe using with road clock
Clock source number as whole system.Indication signal is for identifying each data frame starting position included in the data code flow
Signal, can uniformly be arranged to high level signal, can also uniformly be arranged to low level signal.Often there is an instruction letter
Number, just represent the frame head of a data frame.In the uplink, MAU receives the data service signal that MEU is sent, and will receive
To data service signal converted, be transformed at least identical standard or the radiofrequency signal of different systems all the way, then will
Radiofrequency signal after conversion is sent respectively to one or more base station.
Clock switching device, for receiving the data code flow that MAU is sent, and according to the data code flow received, judge by
Whether the reference clock that the MAU is provided in the reference clock of judging MAU offer is not in normal condition in normal condition
When, indication information is sent to MEU, instruction MEU is same to carrying out the time between MEU and MRU by using the reference clock that MAU is provided
Step is switched to the reference clock provided using the MEU itself to carrying out time synchronization between MEU and MRU.Also, clock switches
Device is additionally operable to the data code flow sent again according to MAU, when the reference clock for judging to be provided by MAU recovers normal condition
(for example, MAU recovers again to normal after a period of time after a power failure) sends indication information to MEU, instruction MEU by use MEU from
The reference clock that body provides switches back into the reference clock pair for being continuing with MAU offers to carrying out time synchronization between MEU and MRU
Time synchronization is carried out between MEU and MRU.
Specifically, clock switching device can specifically parse is respectively used in the data code flow sent by MAU received
The indication signal for each data frame starting position that the data code flow includes is identified, and will be between the adjacent indication signal that parsed
Clock cycle compared with the default clock cycle, when comparative result is identical, determine the reference clock that is provided by the MAU
In normal condition, otherwise determine that the reference clock provided by the MAU is in abnormal condition.
MEU, for receiving the indication information that clock switching device is sent, and according to the indication information received, using by
The reference clock or time synchronization is carried out between MRU to itself using the reference clock provided by itself that MAU is provided.It is used in combination
The data code flow of interaction between MAU and MRU is forwarded.
It should be noted that in using indoor distributed system of the digital high-frequency amplification station as relaying, to realize multi-service
Data-signal zooms out transmission, and can be, but not limited to set multiple MEU, a portion MEU is not to be directly connected with MAU,
But directly connect with other MEU, it then connects and (for details, reference can be made to shown in Fig. 2) with MRU again.
Specifically, the inside composition of MEU can be, but not limited to shown in Fig. 3, including ethernet signal receiving unit, control
Unit, clock unit and processing unit.Wherein, ethernet signal receiving unit, for receive that ethernet device sends with
Too net signal.Specifically, ethernet device can be, but not limited to be to support 100 m ethernet data transmission or gigabit Ethernet
The equipment of data transmission, such as interchanger, router equipment.
Processing unit can be, but not limited to use field programmable gate array (FPGA, Field-Programmable
Gate Array) technology formed a microprocessor, for receiving and forwarding data code flow.Wherein, in the downlink, locate
Reason unit will be received sends data code flow and the Ethernet data service signal sent by ethernet device by MAU, carries out
Merging treatment forms the transmission signal to match with used transmission medium, the transmission signal of formation then is passed through transmission
Medium is sent to MRU.In the uplink, the transmission signal that MRU is sent by transmission medium is received, the transmission received is believed
Number dissection process is carried out, the digital baseband signal that wherein carries and Ethernet data service signal are obtained, by the digital base of acquisition
Band signal is transmitted to MAU, and the Ethernet data service signal of acquisition is based on ethernet frame format carrying and is sent to Ethernet
Equipment.
Clock unit, for generating the clock signal of MEU itself.
Control unit, for control clock unit by the clock signal transmission that clock unit itself generates to processing unit or
The clock signal that person sends according to MAU adjusts the clock signal of clock unit.
MRU, the clock signal for being sent using MEU receives and forwarding data code flow, is kept for the time between MEU same
Step.Wherein, in the downlink, MRU carries out parsing to the transmission signal sent by MEU by transmission medium received
Reason obtains digital baseband signal and Ethernet data service signal, the digital baseband signal of acquisition then is transformed at least one
The radiofrequency signal of the identical standard in road or different systems, and the obtained at least radio frequency of identical standard or different systems all the way will be converted
Signal is sent respectively to rf terminal, and the Ethernet data service signal of acquisition is sent to ethernet terminal.In uplink
Lu Zhong, MRU to receive by rf terminal send at least all the way the radiofrequency signal of identical standard or different systems and with
The Ethernet service signal that too network termination is sent merges processing, forms the biography for being suitble to some transmission medium between MRU and MEU
The transmission signal of formation is sent to MEU by defeated signal by transmission medium.
Wherein, the transmission medium between above-mentioned MAU, MRU, MEU and clock switching device can be, but not limited to be optical fiber, five
Class line, CAT5E UTP cable, six class lines etc..
It should be noted that the clock switching device that the embodiment of the present invention proposes here, can be independently arranged at using straight
Station is put as in any component devices in the indoor distributed system relayed, such as can be arranged in MEU, can also integrate
In MRU, naturally it is also possible to be taken as repeater as an autonomous device in the indoor distributed system of relaying.
Embodiment two
Based on proposing in above-described embodiment one using system architecture of the repeater as the indoor distributed system of relaying,
The embodiment of the present invention two is here using clock switching device as clock is described in detail exemplified by an autonomous device in the system
Switching method, as shown in figure 4, its detailed process is as follows：
Step 41, MAU receives at least identical standard or the radiofrequency signal of different systems all the way that base station is sent, and will receive
The radiofrequency signal arrived is filtered and analog-to-digital conversion process, data service signal is converted into, by transformed digital baseband signal
It forms continuous data code flow and is sent to clock switching device and the MEU being connected directly with MAU.Wherein, clock switching device and
It is connected in parallel on MAU and (for details, reference can be made to shown in Fig. 2) with the MAU MEU being directly connected to.
Step 42, clock switching device is according to the data code flow received, judge be by the reference clock that the MAU is provided
It is no to be in normal condition, if it is judged that being no, then step 43 is performed, continue to execute step 41 conversely, returning, continue to
The data code flow that MAU is sent.
Wherein, in using indoor distributed system of the repeater as relaying, under the normal operating conditions of system, such as
Shown in Fig. 5, in the data code flow being made of continuous data frame sent by MAU, include channel associated clock signal, indication signal
With corresponding data service signal.Channel associated clock signal is sent according to specific coding mode and the MAU base station received
Data service signal is mapped in data frame together, which is the reference clock provided by MAU.Entire
Using (i.e. power down or failure do not occur for MAU under indoor distributed system normal operating condition of the repeater as relaying
State), it is using clock source of the channel associated clock signal as whole system.Indication signal is for identifying in the data code flow
Comprising each data frame starting position signal, can uniformly be arranged to high level signal, can also uniformly be arranged to low electricity
Ordinary mail number.It is preferred that indication signal is uniformly arranged to high level signal by the embodiment of the present invention two here.And the number that MAU is sent
Then it is at least identical standard or not all the way sent by MAU to the base station that receives according to data service signal is included in code stream
Radiofrequency signal with standard carries out treated signal.
Wherein, the data code flow that clock switching device is sent according to the MAU received judges the ginseng provided by the MAU
Examine whether clock can specifically be carried out in normal condition by following manner：
Step 1：Clock switching device carries out dissection process to the data code flow sent by MAU received, parses the section
It is respectively used to identify the indication signal for each data frame starting position that the data code flow includes in the data code flow received.
Step 2：By the clock cycle between the adjacent indication signal parsed compared with the default clock cycle,
When comparative result is identical, determine that the reference clock that is provided by the MAU is in normal condition, i.e., MAU at this time do not occur power down or
Person is broken down, and otherwise determines to be in abnormal condition by the reference clock that MAU is provided.
It is a kind of that preferably the default clock cycle is arranged to by realization method, the embodiment of the present invention two here：Entirely adopting
Under by the use of digital high-frequency amplification station as the indoor distributed system normal operating condition of relaying, by the clock of the MAU reference clocks provided
Under the integral multiple in cycle, such as system normal operating condition, the clock cycle by the MAU reference clocks provided is M, then can incite somebody to action
The default clock cycle is arranged to 5M.At this point, if the clock cycle between the adjacent indication signal parsed is differed for 6M
When default 5M, it is determined that be in abnormal condition by the MAU reference clocks provided at this time.
Step 43, clock switching device is when judging to be not in normal condition by the reference clock that MAU is provided, to MEU
Indication information is sent, instruction MEU is switched to by the MAU the being being currently used reference clocks provided and is provided using the MEU itself
Reference clock, so as to fulfill to carrying out time synchronization between MEU and MRU.
Wherein, MEU itself provide reference clock, can be, but not limited to be MEU itself clock unit provide clock,
It can also be the reference clock provided by the corresponding MEU crystal oscillators set.It is preferred that the embodiment of the present invention two uses here
The reference clock that the clock that the clock unit of MEU itself provides is provided as MEU itself, in this way, needing to cut into row clock in MEU
When changing, it may not be necessary to occupy additional system processing resources and go to obtain the reference clock that other crystal oscillators provide, and root
The clock of the clock unit of MEU itself offer is corrected according to the reference clock of other crystal oscillators offer of acquisition, is avoided
The clock switching instruction that MEU is sent according to clock switching device is shaken during switching into row clock, can be preferable
Realization reference clock take over seamlessly, in clock handoff procedure, system can continue in operating status.
It is preferred that after above-mentioned steps 43, step 44 is further included, clock switching device subsequently continues to MAU and sends
Data code flow, and according to the data code flow received, when the reference clock for judging to be provided by the MAU recovers normal condition
(such as the failure of recovery or MAU are removed after MAU power down), instruction MEU is by using the reference clock pair that its own is provided
Time synchronization is carried out between MEU and MRU, switches back into the reference clock for being continuing with being provided by MAU to being carried out between MEU and MRU
Time synchronization.If it is judged that when the reference clock provided by the MAU does not recover normal condition also, then clock switching device is not sent out
Switching is sent to indicate, clock source of the reference clock that MEU continues to keep that its own is used to provide at this time as whole system comes real
Existing time synchronization between MEU and MRU ensures the normal operation of entire indoor distributed system.
Wherein, the reference clock that MAU is provided, is that clock switching device is parsed from the data code flow sent by MAU
The channel associated clock signal come.The channel associated clock signal included in the data code flow sent for MAU, above-mentioned steps 42 are in detail
It illustrates, which is not described herein again.
Correspondingly, the embodiment of the present invention two also proposes a kind of clock switching device here, structure composition as shown in fig. 6,
Including：
Code stream receiving unit 61, in using indoor distributed system of the repeater as relaying, receiving multi-service
The data code flow that access unit MAU is sent.
Judging unit 62 for the data code flow received according to code stream receiving unit 61, judges what is provided by the MAU
Whether reference clock is in normal condition.
Specifically, judging unit is respectively used to identify the data specifically for parsing in the data code flow received
The indication signal for each data frame starting position that code stream includes；By the clock cycle between the adjacent indication signal parsed with
The default clock cycle is compared, and when comparative result is identical, the reference clock for determining to be provided by the MAU is in normal shape
Otherwise state determines that the reference clock provided by the MAU is in abnormal condition.
Clock switch control unit 63, for judging that the reference clock that the MAU is provided is not in judging unit 62
During normal condition, instruction multi-service expanding element MEU is by using reference clock that the MAU is provided to MEU and multi-service remote-end
Time synchronization is carried out between unit MRU, is switched to the reference clock provided using the MEU itself to being carried out between MEU and MRU
Time synchronization.
Judging unit in clock switching device set forth above is additionally operable to receive institute again according to code stream receiving unit
The data code flow that MAU is sent is stated, judges whether the reference clock provided by the MAU recovers normal condition；Clock switching control
Unit processed is additionally operable to when the reference clock that judging unit is judged to be provided by the MAU recovers normal condition, described in instruction
MEU is by using the reference clock of MEU itself offers to be switched to and carried using the MAU to carrying out time synchronization between MEU and MRU
The reference clock of confession is to carrying out time synchronization between MEU and MRU.
Embodiment three
Based on proposing in above-described embodiment one using on basis of the repeater as the indoor distributed system of relaying,
Exemplified by the embodiment of the present invention three here integrates clock switching device in MEU within the system, clock is further described
Switching method, as shown in fig. 7, its detailed process is as follows：
Step 71, MAU receives at least identical standard or the radiofrequency signal of different systems all the way that base station is sent, and will receive
The radiofrequency signal arrived is filtered and analog-to-digital conversion process, digital baseband signal is converted into, by transformed digital baseband signal
It forms continuous data code flow and is sent to the MEU being connected directly with MAU.
Step 72, whether MEU judges the reference clock provided by the MAU in just according to the data code flow received
Normal state if it is judged that being no, then performs step 43, conversely, performing step 41, continues to the numeric data code that MAU is sent
Stream.
Wherein, in using indoor distributed system of the repeater as relaying, under the normal operating conditions of system, by
In the data code flow being made of continuous data frame that MAU is sent, include channel associated clock signal, indication signal and corresponding industry
Business data-signal.Specifically, the signal in the data code flow sent by MAU forms in two step 42 of above-described embodiment in detail
Thin to illustrate, which is not described herein again.
Wherein, the data code flow that MEU is sent according to the MAU received judges whether be in by the reference clock that MAU is provided
Normal condition can specifically be carried out by following manner：
Step 1：MEU carries out dissection process to the data code flow sent by MAU received, parses what this section received
It is respectively used to identify the indication signal for each data frame starting position that the data code flow includes in data code flow.
Step 2：By the clock cycle between the adjacent indication signal parsed compared with the default clock cycle,
When comparative result is identical, the reference clock for determining to be provided by the MAU is in normal condition, otherwise determines what is provided by MAU
Reference clock is in abnormal condition.
It is a kind of that preferably the default clock cycle is arranged to system here and normally transported by realization method, the embodiment of the present invention two
Under row state, by the integral multiple of the MAU reference clocks provided, such as under system normal operating condition, during the reference provided by MAU
The clock cycle of clock is M, then can be arranged to 5M the default clock cycle.If it at this point, is being connected directly with the MEU
There is power down in MAU, break down or MEU and MAU between without in connection when, MEU still can receive other business numbers
It is believed that number (such as ethernet device present in indoor distributed system send Ethernet service data-signal), but at this
In the case of kind, the clock cycle between the adjacent indication signal that MEU is parsed according to the data code flow received is 4M, is differed
When default 5M, it is determined that be in abnormal condition by the MAU reference clocks provided at this time.
Step 73, MEU is when judging to be not in normal condition by the reference clock that MAU is provided, then by the clock of system
Source is switched to the reference clock provided using the MEU itself by the MAU the being being currently used reference clocks provided, uses switching
Clock source of the reference clock that MEU afterwards itself is provided as whole system, so as to fulfill to carrying out the time between MEU and MRU
It is synchronous.
Wherein, MEU itself provide reference clock, can be, but not limited to be MEU itself clock unit provide clock,
It can also be the reference clock provided by the corresponding MEU crystal oscillators set.It is preferred that the embodiment of the present invention two uses here
The clock unit of MEU itself is provided as the reference clock of MEU itself offers, in this way, needing to switch into row clock in MEU
When, it may not be necessary to it occupies additional system processing resources and goes to obtain the reference clock that other crystal oscillators provide, avoid
The shake occurred in clock handoff procedure can be realized preferably and taken over seamlessly, and in clock handoff procedure, system can also be after
It is continuous to be in operating status.
Step 74, MEU subsequently continues to the data code flow that MAU is sent, and according to the data code flow received, judge by
Whether the reference clock that the MAU is provided recovers to normal condition.Recover in the reference clock for determining MAU offers to normal condition
When, the reference clock currently in use provided by the clock unit of itself is switched to the reference clock provided by MAU by MEU, is cut
After changing, clock source of the repeater as the indoor distributed system of relaying is used using the reference clock that MAU is provided as entire,
So as to ensure the time synchronization between MEU and MRU, ensure the normal operation of whole system.
Wherein, the reference clock that MAU is provided, is to be parsed from the data code flow sent by MAU with road clock
Signal.The channel associated clock signal included in the data code flow sent for MAU, step 42 is in detail in above-described embodiment two
It illustrates, which is not described herein again.
It will be understood by those skilled in the art that the embodiment of the present invention can be provided as method, apparatus (equipment) or computer
Program product.Therefore, in terms of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and hardware
Embodiment form.Moreover, the meter for wherein including computer usable program code in one or more can be used in the present invention
The computer journey that calculation machine usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of sequence product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow chart of device (equipment) and computer program product
And/or block diagram describes.It should be understood that each flow in flowchart and/or the block diagram can be realized by computer program instructions
And/or the flow in box and flowchart and/or the block diagram and/or the combination of box.These computer programs can be provided to refer to
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is made to generate
One machine so that the instruction generation performed by computer or the processor of other programmable data processing devices is used to implement
The device for the function of being specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make these embodiments other change and modification.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and scope.In this way, if these modifications and changes of the present invention belongs to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these modification and variations.
Claims (13)
1. a kind of clock-switching method, which is characterized in that the method is applied to using indoor distribution of the repeater as relaying
In formula system, the indoor distributed system include muti-service access unit MAU, with the MAU be directly or indirectly connected to
A few multi-service expanding element MEU, at least one multi-service remote-end unit MRU being connected with MEU and clock switching dress
It puts, wherein, the clock switching device is in parallel with the MEU that the MAU is connected directly or is integrated in and is connected directly with the MAU
MEU in；The described method includes：
The clock switching device receives the data code flow that MAU is sent；
The clock switching device judges whether the reference clock provided by the MAU is according to the data code flow received
Normal condition；
The clock switching device indicates each MEU when the reference clock for judging that the MAU is provided is not in normal condition
By using the reference clock that the MAU is provided same to carrying out the time between each MEU and MRU in the indoor distributed system
Step, be switched to using the reference clock that the MEU itself being connected directly with the MAU is provided between each MEU and MRU into
Row time synchronization.
2. the method as described in claim 1, which is characterized in that further include:
The data code flow that the MAU is sent is received again, and according to the data code flow received again, is judged by institute
When stating the reference clock recovery normal condition of MAU offers, indicate the MEU by using the reference clock that the MEU itself is provided
To carrying out time synchronization between MEU and MRU, it is switched to using the reference clock that the MAU is provided to being carried out between MEU and MRU
Time synchronization.
3. method as claimed in claim 1 or 2, which is characterized in that according to the data code flow received, judge by the MAU
Whether the reference clock of offer is in normal condition, including：
It parses and is respectively used to identify each data frame starting position that the data code flow includes in the data code flow received
Indication signal；
By the clock cycle between the adjacent indication signal parsed compared with the default clock cycle, in comparative result phase
Meanwhile the reference clock for determining to be provided by the MAU is in normal condition, otherwise
The reference clock for determining to be provided by the MAU is in abnormal condition.
4. the method as described in claim 1, which is characterized in that the MEU itself provide reference clock be MEU itself when
The reference clock that the clock that clock unit provides or the crystal oscillator to be set by corresponding MEU provide.
5. a kind of clock switching device, which is characterized in that described device is arranged on using indoor distribution of the repeater as relaying
In formula system, the indoor distributed system include muti-service access unit MAU, with the MAU be directly or indirectly connected to
A few multi-service expanding element MEU, at least one multi-service remote-end unit MRU being connected with MEU and clock switching dress
It puts, wherein, the clock switching device is in parallel with the MEU that the MAU is connected directly or is integrated in and is connected directly with the MAU
MEU in, described device includes：
Code stream receiving unit, in using indoor distributed system of the repeater as relaying, receiving multi service access list
The data code flow that first MAU is sent；
Judging unit for the data code flow received according to code stream receiving unit, judges the reference clock provided by the MAU
Whether normal condition is in；
Clock switch control unit, for judging that the reference clock that the MAU is provided is not in normal condition in judging unit
When, instruction multi-service expanding element MEU by use reference clock that the MAU is provided to MEU and multi-service remote-end unit MRU it
Between carry out time synchronization, be switched to using the MEU itself provide reference clock to carrying out time synchronization between MEU and MRU.
6. device as claimed in claim 5, which is characterized in that the judging unit is additionally operable to according to code stream receiving unit again
The secondary data code flow for receiving the MAU and sending, judges whether the reference clock provided by the MAU recovers normal condition；
Clock switch control unit is additionally operable to recover normal shape in the reference clock that judging unit is judged to be provided by the MAU
During state, indicate the MEU by the reference clock of MEU itself offers is used to be switched to carrying out time synchronization between MEU and MRU
Using the reference clock that the MAU is provided to carrying out time synchronization between MEU and MRU.
7. such as device described in claim 5 or 6, which is characterized in that the judging unit, specifically for parsing the institute received
State the indication signal for being respectively used to identify each data frame starting position that the data code flow includes in data code flow；It will parse
Adjacent indication signal between clock cycle compared with the default clock cycle, when comparative result is identical, determine by
The reference clock that the MAU is provided is in normal condition, otherwise determines that the reference clock provided by the MAU is in improper shape
State.
8. device as claimed in claim 5, which is characterized in that the MEU itself provide reference clock be MEU itself when
The reference clock that the clock that clock unit provides or the crystal oscillator to be set by corresponding MEU provide.
9. it is a kind of using indoor distributed system of the repeater as relaying, including the muti-service access unit MAU and MAU
Directly or indirectly connected at least one multi-service expanding element MEU, at least one multi-service remote-end unit being connected with MEU
MRU, which is characterized in that clock switching device is further included, the clock switching device is in parallel with the MEU that the MAU is connected directly,
Or it is integrated in the MEU being connected directly with the MAU；Wherein：
The MAU, for sending data code flow；
The clock switching device, for receiving the data code flow that the MAU is sent；And according to the data code flow received, sentence
Whether the disconnected reference clock provided by the MAU is in normal condition；It is not in the reference clock for judging the MAU offers
During normal condition, indicate the MEU by the reference clock of MAU offers is used to switch to carrying out time synchronization between MEU and MRU
To the reference clock provided using the MEU itself to carrying out time synchronization between MEU and MRU；
The MEU, for according to the instruction of the clock switching device, using the reference clock or use provided by the MAU
The reference clock provided by itself carries out time synchronization to itself between MRU.
10. system as claimed in claim 9, which is characterized in that the clock switching device is additionally operable to according to the MAU again
The secondary data code flow sent when the reference clock for judging to be provided by the MAU recovers normal condition, indicates the MEU by making
The reference clock provided with MEU itself is switched to the reference provided using the MAU to carrying out time synchronization between MEU and MRU
Clock is to carrying out time synchronization between MEU and MRU.
11. the system as described in claim 9 or 10, which is characterized in that the clock switching device is received specifically for parsing
To the data code flow in be respectively used to identify the indication signal of each data frame starting position that the data code flow includes；And
It is identical in comparative result by the clock cycle between the adjacent indication signal parsed compared with the default clock cycle
When, the reference clock for determining to be provided by the MAU is in normal condition, otherwise determines the reference clock provided by the MAU
In abnormal condition.
12. system as claimed in claim 9, which is characterized in that the clock switching device is arranged in the MEU.
13. system as claimed in claim 9, which is characterized in that the reference clock that the MEU itself is provided is MEU's itself
The reference clock that the clock that clock unit provides or the crystal oscillator to be set by corresponding MEU provide.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/085083 WO2013097199A1 (en) | 2011-12-30 | 2011-12-30 | Method and device for switching clocks, and distributed indoor system using repeater as relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104025701A CN104025701A (en) | 2014-09-03 |
| CN104025701B true CN104025701B (en) | 2018-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201180074855.3A Active CN104025701B (en) | 2011-12-30 | 2011-12-30 | The indoor distributed system of clock-switching method, device and repeater as relaying |
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| CN (1) | CN104025701B (en) |
| WO (1) | WO2013097199A1 (en) |
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| CN110612755B (en) | 2017-04-27 | 2021-12-24 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
| CN107222279A (en) * | 2017-05-05 | 2017-09-29 | 京信通信技术(广州)有限公司 | Ethernet service guard method and system in distributed system |
| CN111162862B (en) * | 2019-12-31 | 2021-09-24 | 京信网络系统股份有限公司 | Distributed multi-network element clock transmission system |
| CN111162863B (en) * | 2019-12-31 | 2022-09-30 | 京信网络系统股份有限公司 | Access network device and data processing method |
| CN111193625B (en) * | 2019-12-31 | 2022-05-06 | 京信网络系统股份有限公司 | Routing method, device, system, computer device and storage medium |
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| CN104025701A (en) | 2014-09-03 |
| WO2013097199A1 (en) | 2013-07-04 |
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Address after: 510663 No. 10 Shenzhou Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 No. 10 Shenzhou Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee before: Comba Telecom System (China) Ltd. |