CN108370612A - The method, apparatus and system that clock synchronizes between a kind of Base Band Unit - Google Patents

The method, apparatus and system that clock synchronizes between a kind of Base Band Unit Download PDF

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Publication number
CN108370612A
CN108370612A CN201580085130.2A CN201580085130A CN108370612A CN 108370612 A CN108370612 A CN 108370612A CN 201580085130 A CN201580085130 A CN 201580085130A CN 108370612 A CN108370612 A CN 108370612A
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clock source
bbu
clock
master
frame number
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CN108370612B (en
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王玉仁
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses the methods that clock between a kind of Base Band Unit synchronizes, including：Wireless remote device determines that the clock source of a BBU is master clock source from the multiple BBU being connect with the wireless remote device, and the clock source of other BBU is from clock source, and other BBU are the BBU in addition to one BBU in the multiple BBU；The wireless remote device obtains the clock information of master clock source；The wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source.The method that clock synchronizes between Base Band Unit provided in an embodiment of the present invention can just realize that the clock between BBU is same, to reduce the complexity that clock synchronizes between BBU, providing convenience property under the premise of not increasing hardware.

Description

Clock synchronous method, apparatus and system between a kind of Base Band Unit Technical field
The present invention relates to fields of communication technology, and in particular to clock synchronous method, apparatus and system between a kind of Base Band Unit BBU.
Background technique
Base Band Unit (Base Band Unit,) and wireless remote unit (Radio Remote Unit BBU, RRU) be base station element, BBU is generally positioned at computer room, RRU can mount to floor, using connection between BBU and RRU, RRU passes through coaxial cable and power splitter again or coupler is connected to antenna.
With the development of wireless communication industry, it will appear multimode communication under more and more scenes and coexist.The radio frame number and 10ms phase for so requiring the BBU of different systems to export are fully synchronized, that is, to guarantee that clock is synchronous, to guarantee the correctness of data processing.Radio frame number refers to the radio frames frame number on common public radio interface (Common Public Radio Interface, CPRI) interface, every 10ms plus 1.10ms is the frame length of radio frames, and 10ms phase refers to the phase relation for the radio frames transmitted between BBU and RRU.
Clock is synchronous to be also known as timing synchronization, refers to the synchronization of absolute clock, it is desirable that the initial time and world's unified clock (Coordinated Universal Time, UTC) clock of signal are consistent.Clock herein is synchronous, refers to the radio frame number synchronization between BBU and 10ms phase alignment.
It may be far because being located at the distance between BBU of different websites, so radio frame number be difficult with phase it is synchronous, have in the prior art by increasing interconnection veneer on each BBU, realize that the clock between each BBU is synchronous between interconnection veneer in such a way that optical fiber connects, but need to increase hardware in this way, the complexity for causing clock synchronous is high.
Summary of the invention
Clock difference to solve to realize in the prior art between BBU can only be realized by increasing the mode of hardware, the high problem of complexity, the embodiment of the present invention provides a kind of method that clock is synchronous between Base Band Unit, it can be under the premise of not increasing hardware, with regard to realizing that the clock between BBU is same, to reduce the complexity that clock is synchronous between BBU, providing convenience property.The embodiment of the present invention also provides corresponding devices and system.
First aspect present invention provides a kind of method that clock is synchronous between Base Band Unit BBU, comprising:
Wireless remote device determines that the clock source of a BBU is master clock source from the multiple BBU connecting with the wireless remote device, and the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU；
The wireless remote device obtains the clock information of master clock source；
The wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source.
First aspect can just realize that the clock between BBU is same, to reduce the complexity that clock is synchronous between BBU, providing convenience property under the premise of not increasing hardware.
With reference to first aspect, in the first possible implementation, when the wireless remote device obtains the clock information of master clock source, the method also includes:
The wireless remote device obtains each clock information from clock source；
The wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source, comprising:
The wireless remote device determines the difference of the clock information of each clock information from clock source and the master clock source；
The wireless remote device to it is described it is each send corresponding difference from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the corresponding difference.
The first possible implementation of first aspect, being adjusted by the difference in master-salve clock source from clock source can be improved the synchronous accuracy of clock.
With reference to first aspect, in the second possible implementation, the wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source, comprising:
The clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source to each clock information for sending the master clock source from the BBU of clock source, the clock information of the master clock source by the wireless remote device.
The first possible implementation with reference to first aspect, in the third possible implementation, the wireless remote device obtain the clock information and each clock information from clock source of master clock source, packet It includes:
The radio frame number and phase of the wireless remote device acquisition master clock source and each radio frame number and phase from clock source；
The wireless remote device determines the difference of the clock information of each clock information from clock source and the master clock source, comprising:
The wireless remote device determines each frame number difference and phase difference value between clock source and the master clock source, the frame number difference is the difference between each radio frame number from clock source and the radio frame number of the master clock source, and the phase difference value is the difference between each phase from clock source and the phase of the master clock source；
The wireless remote device to it is described it is each send corresponding difference from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the corresponding difference, comprising:
The wireless remote device each sends corresponding frame number difference and corresponding phase difference value from the BBU of clock source to described, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the corresponding frame number difference, and the corresponding phase difference value is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
The third possible implementation of first aspect can further improve the accuracy of clock adjustment with synchronous radio frame number and phase difference.
Second of possible implementation with reference to first aspect, in the fourth possible implementation, the wireless remote device obtain the clock information of master clock source, comprising:
The wireless remote device obtains the radio frame number and phase of master clock source；
The wireless remote device is to each clock information for sending the master clock source from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the clock information of the master clock source, comprising:
The wireless remote device is to each radio frame number and phase for sending the master clock source from the BBU of clock source, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the radio frame number of the master clock source, and the phase of the master clock source is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
Second aspect of the present invention provides a kind of wireless remote device, comprising:
Determination unit, for determining that the clock source of a BBU is master clock source from the multiple BBU connecting with the wireless remote device, the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU；
Acquiring unit, for obtaining the clock information for the master clock source that the determination unit determines；
Synchronization unit, the clock information of the master clock source for being obtained according to the acquiring unit synchronize each clock information from clock source.
Second aspect can just realize that the clock between BBU is same, to reduce the complexity that clock is synchronous between BBU, providing convenience property under the premise of not increasing hardware.
In conjunction with second aspect, in the first possible implementation,
The acquiring unit is also used to obtain each clock information from clock source；
The synchronization unit includes:
Subelement is determined, for determining the difference of each clock information from clock source of the acquiring unit acquisition and the clock information of the master clock source；
Transmission sub-unit, for to each corresponding difference for sending the determining subelement determination from the BBU of clock source, the clock information of itself to be adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the corresponding difference.
The first possible implementation of second aspect, being adjusted by the difference in master-salve clock source from clock source can be improved the synchronous accuracy of clock.
In conjunction with second aspect, in the second possible implementation,
The synchronization unit, specifically for the wireless remote device to each clock information for sending the master clock source from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the clock information of the master clock source.
The first possible implementation in conjunction with second aspect, in the third possible implementation,
The acquiring unit, radio frame number and phase and each radio frame number and phase from clock source specifically for acquisition master clock source；
The determining subelement, specifically for determination each frame number difference and phase difference value between clock source and the master clock source, the frame number difference is each radio frame number from clock source and the master Difference between the radio frame number of clock source, the phase difference value are the difference between each phase from clock source and the phase of the master clock source；
The transmission sub-unit, specifically for each sending corresponding frame number difference and corresponding phase difference value from the BBU of clock source to described, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the corresponding frame number difference, and the corresponding phase difference value is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
The third possible implementation of second aspect can further improve the accuracy of clock adjustment with synchronous radio frame number and phase difference.
In conjunction with second of second aspect possible implementation, in the fourth possible implementation,
The acquiring unit, specifically for obtaining the radio frame number and phase of master clock source；
The synchronization unit, specifically for each radio frame number and phase for sending the master clock source from the BBU of clock source, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the radio frame number of the master clock source, and the phase of the master clock source is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
Third aspect present invention provides a kind of wireless remote device, comprising: input-output apparatus, memory and processor,
The processor is for executing following steps:
The clock source that a BBU is determined from the multiple BBU connecting with the wireless remote device is master clock source, and the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU；
Obtain the clock information of master clock source；
Each clock information from clock source is synchronized according to the clock information of the master clock source.
The third aspect can just realize that the clock between BBU is same, to reduce the complexity that clock is synchronous between BBU, providing convenience property under the premise of not increasing hardware.
In conjunction with the third aspect, in the first possible implementation,
The processor is also used to obtain each clock information from clock source, determines the difference of the clock information of each clock information from clock source and the master clock source；
The input-output apparatus is used for described each from the corresponding difference of the BBU of clock source transmission, institute It states corresponding difference and the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source.
The first possible implementation of the third aspect, being adjusted by the difference in master-salve clock source from clock source can be improved the synchronous accuracy of clock.
In conjunction with the third aspect, in the second possible implementation,
The input-output apparatus is used for each clock information for sending the master clock source from the BBU of clock source, and the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the clock information of the master clock source.
The first possible implementation in conjunction with the third aspect, in the third possible implementation,
The processor is used for:
The radio frame number and phase of acquisition master clock source and each radio frame number and phase from clock source；
Determine each frame number difference and phase difference value between clock source and the master clock source, the frame number difference is the difference between each radio frame number from clock source and the radio frame number of the master clock source, and the phase difference value is the difference between each phase from clock source and the phase of the master clock source；
The input-output apparatus is used for described each from the BBU of the clock source corresponding frame number difference of transmission and corresponding phase difference value, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the corresponding frame number difference, and the corresponding phase difference value is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
The third possible implementation of the third aspect can further improve the accuracy of clock adjustment with synchronous radio frame number and phase difference.
In conjunction with second of the third aspect possible implementation, in the fourth possible implementation,
The processor is used to obtain the radio frame number and phase of master clock source；
The input-output apparatus is used for each radio frame number and phase for sending the master clock source from the BBU of clock source, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the radio frame number of the master clock source, and the phase of the master clock source is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
Fourth aspect present invention provides the system that clock is synchronous between a kind of Base Band Unit BBU, including multiple bases It include a RRU synchronous for clock in tape cell BBU and multiple wireless remote unit R RU, the multiple RRU, the multiple BBU is connect with the multiple RRU；
The RRU synchronous for clock is wireless remote device described in above-mentioned second aspect or any possible implementation of second aspect.
Fifth aspect present invention provides the system that clock is synchronous between a kind of Base Band Unit BBU, including multiple Base Band Unit BBU, multiple wireless remote unit R RU and RRU hubs, and the multiple RRU is connect by the RRU hub with the BBU；
Wireless remote device described in the RRU hub the claims second aspect or any possible implementation of second aspect.
The synchronous system of clock between Base Band Unit provided in an embodiment of the present invention can just realize that the clock between BBU is same, to reduce the complexity that clock is synchronous between BBU, providing convenience property under the premise of not increasing hardware.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, the accompanying drawings required for describing the embodiments of the present invention are briefly described below, apparently, drawings in the following description are only some embodiments of the invention, for those skilled in the art, without creative efforts, other attached drawings be can also be obtained according to these attached drawings.
Fig. 1 is an embodiment schematic diagram of the synchronous system of clock between BBU in the embodiment of the present invention；
Fig. 2 is another embodiment schematic diagram of the synchronous system of clock between BBU in the embodiment of the present invention；
Fig. 3 is another embodiment schematic diagram of the synchronous system of clock between BBU in the embodiment of the present invention；
Fig. 4 is an embodiment schematic diagram of the synchronous method of clock between BBU in the embodiment of the present invention；
Fig. 5 is an embodiment schematic diagram of wireless remote device in the embodiment of the present invention；
Fig. 6 is another embodiment schematic diagram of wireless remote device in the embodiment of the present invention；
Fig. 7 is another embodiment schematic diagram of wireless remote device in the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention provides a kind of method that clock is synchronous between Base Band Unit, can just realize that the clock between BBU is same, to reduce the complexity that clock is synchronous between BBU, providing convenience property under the premise of not increasing hardware.The embodiment of the present invention also provides corresponding devices and system.It carries out individually below detailed Explanation.
Following will be combined with the drawings in the embodiments of the present invention, and technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art's all other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Wireless remote device in the embodiment of the present invention can be RRU RRU hub (HUB), RRU RRU HUB can connect multiple BBU, certainly also include two BBU of connection, either connect several BBU, the synchronous principle of clock is identical in the embodiment of the present invention.
Can there are multiple BBU and multiple RRU in a base station, the standard of multiple BBU can be identical, it can also be different, there are many scene that current more different systems coexist, such as can have for Universal Mobile Communication System (Universal Mobile Telecommunications System, UMTS) standard, can also have for long term evolution (Long Term Evolution, LTE) standard, can also there is other standards certainly.
Fig. 1 is an embodiment schematic diagram of the synchronous system of clock between Base Band Unit BBU in the embodiment of the present invention.
Refering to fig. 1, an embodiment of the synchronous system of clock includes: the first RRU, the 2nd RRU, the 3rd RRU, the first BBU and the 2nd BBU between Base Band Unit BBU provided in an embodiment of the present invention, first BBU and the 2nd BBU is communicated to connect with the first RRU, the 2nd RRU and the 3rd RRU respectively, be can be and is connected by optical fiber.Currently, it is only illustrated by taking these three RRU and two BBU as an example in the embodiment of the present invention, in fact, may include more RRU and BBU in the system.
First BBU is UMTS standard, and the 2nd BBU is LTE standard, and the first RRU is used to synchronize the clock information between the first BBU and the 2nd BBU.
First RRU can determine that the clock source of the first BBU is master clock source, then the clock source of the 2nd BBU is from clock source.If there are also others BBU in the embodiment of the present invention, then the clock source of other BBU is also from clock source, no matter have several from clock source, the synchronous principle of clock is all identical, it is illustrated by taking the slave clock source of the 2nd BBU as an example in the embodiment of the present invention, if having multiple from clock source, can be understood refering to the slave clock source of the 2nd BBU.
First RRU obtains the clock information of the master clock source of the first BBU.
First RRU synchronizes the slave clock source of the 2nd BBU according to the clock information of the master clock source of the first BBU Clock information.
The synchronous process of clock can have following scheme in the embodiment of the present invention:
A kind of scheme may is that
When first RRU obtains the clock information of the master clock source of the first BBU, the clock information of the slave clock source of the 2nd BBU is also obtained.
The clock information of the slave clock source of 2nd BBU is compared by the first RRU with the clock information of the master clock source of the first BBU.
First RRU determines the difference of the clock information of the clock information of the slave clock source of the 2nd BBU and the master clock source of the first BBU by comparing.
First RRU sends the difference to the 2nd BBU, and the clock information of itself is adjusted to synchronous with the clock information of the master clock source according to the difference by the 2nd BBU.
In this scheme, specifically it may is that
The radio frame number and phase of the slave clock source of the radio frame number and phase and the 2nd BBU of the master clock source of the first BBU of first RRU acquisition.
The radio frame number of the master clock source of first BBU is compared first RRU with the radio frame number of the slave clock source of the 2nd BBU, obtains frame number difference, and the phase of the master clock source of the first BBU is compared with the phase of the slave clock source of the 2nd BBU, obtains phase difference value.Phase in the embodiment of the present invention refers to the phase of clock signal.
First RRU sends the frame number difference and phase difference value to the 2nd BBU, and the 2nd BBU adjusts the radio frame number of itself according to the frame number difference, and the phase of itself is adjusted according to phase difference value, realizes synchronous with the clock of master clock source.
Another scheme may is that
First RRU sends the clock information of the master clock source of the first RRU to the 2nd BBU, and the clock information of itself is adjusted to synchronous with the clock information of the master clock source according to the clock information of the master clock source by the 2nd BBU.
In this scheme, specifically it may is that
First RRU obtains the radio frame number and phase of the master clock source of the first BBU.
First RRU to the 2nd BBU send the first BBU master clock source radio frame number and phase, second The radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source according to the radio frame number of the master clock source of the first BBU by BBU, according to the phase of the master clock source of the first BBU by the phase adjustment of itself to the Phase synchronization with the master clock source.
Fig. 2 is another embodiment schematic diagram of the synchronous system of clock between Base Band Unit BBU in the embodiment of the present invention.
Refering to Fig. 2, an embodiment of the synchronous system of clock includes: the first RRU, the 2nd RRU, the 3rd RRU, RRU hub, the first BBU and the 2nd BBU between Base Band Unit BBU provided in an embodiment of the present invention, first BBU and the 2nd BBU is connect with RRU hub respectively, first RRU, the 2nd RRU and the 3rd RRU are connect with RRU hub respectively, be can be and are connected by optical fiber.Currently, it is only illustrated by taking these three RRU and two BBU as an example in the embodiment of the present invention, in fact, may include more RRU and BBU in the system.
First BBU is UMTS standard, and the 2nd BBU is LTE standard, the clock information between synchronous first BBU and the 2nd BBU of RRU hub.
RRU hub can determine that the clock source of the first BBU is master clock source, then the clock source of the 2nd BBU is from clock source.If there are also others BBU in the embodiment of the present invention, then the clock source of other BBU is also from clock source, no matter have several from clock source, the synchronous principle of clock is all identical, it is illustrated by taking the slave clock source of the 2nd BBU as an example in the embodiment of the present invention, if having multiple from clock source, can be understood refering to the slave clock source of the 2nd BBU.
RRU hub obtains the clock information of the master clock source of the first BBU.
RRU hub synchronizes the clock information of the slave clock source of the 2nd BBU according to the clock information of the master clock source of the first BBU.
The synchronous process of clock can have following scheme in the embodiment of the present invention:
A kind of scheme may is that
When RRU hub obtains the clock information of the master clock source of the first BBU, the clock information of the slave clock source of the 2nd BBU is also obtained.
The clock information of the slave clock source of 2nd BBU is compared by RRU hub with the clock information of the master clock source of the first BBU.
RRU hub by comparing the slave clock source for determining the 2nd BBU clock information and the first BBU The difference of the clock information of master clock source.
RRU hub sends the difference to the 2nd BBU, and the clock information of itself is adjusted to synchronous with the clock information of the master clock source according to the difference by the 2nd BBU.
In this scheme, specifically it may is that
The radio frame number and phase of the slave clock source of the radio frame number and phase and the 2nd BBU of the master clock source of the first BBU of RRU hub acquisition.
The radio frame number of the master clock source of first BBU is compared RRU hub with the radio frame number of the slave clock source of the 2nd BBU, obtain frame number difference, the phase of the master clock source of first BBU is compared with the phase of the slave clock source of the 2nd BBU, obtains phase difference value.Phase in the embodiment of the present invention refers to the phase of clock signal.
RRU hub sends the frame number difference and phase difference value to the 2nd BBU, and the 2nd BBU adjusts the radio frame number of itself according to the frame number difference, and the phase of itself is adjusted according to phase difference value, realizes synchronous with the clock of master clock source.
Another scheme may is that
RRU hub sends the clock information of the master clock source of RRU hub to the 2nd BBU, and the clock information of itself is adjusted to synchronous with the clock information of the master clock source according to the clock information of the master clock source by the 2nd BBU.
In this scheme, specifically it may is that
RRU hub obtains the radio frame number and phase of the master clock source of the first BBU.
RRU hub sends the radio frame number and phase of the master clock source of the first BBU to the 2nd BBU, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source according to the radio frame number of the master clock source of the first BBU by the 2nd BBU, according to the phase of the master clock source of the first BBU by the phase adjustment of itself to the Phase synchronization with the master clock source.
Fig. 3 is another embodiment schematic diagram of the synchronous system of clock between Base Band Unit BBU in the embodiment of the present invention.
Refering to Fig. 3, the BBU of offer master clock source is provided including master clock BBU, from clock BBU and RRU the RRU hub synchronous for clock, master clock BBU, the BBU provided from clock source is provided from clock BBU.
RRU RRU hub includes two CPRI modules and phase demodulation module, and two CPRI modules are used to communicate with master clock BBU and from clock BBU, and phase demodulation module is used to compare the phase of the information of master-salve clock.
RRU RRU hub is communicated with master clock BBU and from clock BBU respectively by two CPRI modules, is obtained the clock information of master clock BBU, is obtained the clock information from clock BBU.
The clock information of master clock BBU and clock information from clock BBU are sent to phase demodulation module by RRU RRU hub respectively, phase demodulation module is compared by the clock information of master clock BBU and from the clock information of clock BBU, using master clock source as standard time clock, the 10ms phase difference of the 10ms phase and master clock source from clock source is calculated separately.
RRU or RRU hub returns to master clock BBU and each from the 10ms phase difference of clock BBU and the radio frame number of master clock BBU from clock BBU by CPRI module.
Itself 10ms phase and radio frame number are adjusted from clock BBU by the radio frame number of 10ms phase difference and master clock BBU that passback obtains, reach synchronous with the radio frame number of master clock BBU and 10ms phase.
Refering to Fig. 4, an embodiment of the synchronous method of clock includes: between Base Band Unit BBU provided in an embodiment of the present invention
101, wireless remote device determines that the clock source of a BBU is master clock source from the multiple BBU connecting with the wireless remote device, and the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU.
102, the wireless remote device obtains the clock information of master clock source.
103, the wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source.
It can only be realized by increasing the mode of hardware with to realize the clock difference between BBU in the prior art, complexity is high to be compared, the embodiment of the present invention provides a kind of method that clock is synchronous between Base Band Unit, it can be under the premise of not increasing hardware, with regard to realizing that the clock between BBU is same, to reduce the complexity that clock is synchronous between BBU, providing convenience property.
Optionally, on the basis of above-mentioned Fig. 4 corresponding embodiment, between Base Band Unit BBU provided in an embodiment of the present invention in first alternative embodiment of the synchronous method of clock, when the wireless remote device obtains the clock information of master clock source, the method can also include:
The wireless remote device obtains each clock information from clock source；
The wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source, comprising:
The wireless remote device determines the difference of the clock information of each clock information from clock source and the master clock source；
The wireless remote device to it is described it is each send corresponding difference from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the corresponding difference.
Optionally, on the basis of above-mentioned Fig. 4 corresponding embodiment, between Base Band Unit BBU provided in an embodiment of the present invention in second alternative embodiment of the synchronous method of clock, the wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source, may include:
The clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source to each clock information for sending the master clock source from the BBU of clock source, the clock information of the master clock source by the wireless remote device.
Optionally, between above-mentioned Base Band Unit BBU on the basis of the synchronous method of clock corresponding first alternative embodiment, between Base Band Unit BBU provided in an embodiment of the present invention in the third alternative embodiment of the synchronous method of clock, the wireless remote device obtains the clock information and each clock information from clock source of master clock source, may include:
The radio frame number and phase of the wireless remote device acquisition master clock source and each radio frame number and phase from clock source；
The wireless remote device determines the difference of the clock information of each clock information from clock source and the master clock source, may include:
The wireless remote device determines each frame number difference and phase difference value between clock source and the master clock source, the frame number difference is the difference between each radio frame number from clock source and the radio frame number of the master clock source, and the phase difference value is the difference between each phase from clock source and the phase of the master clock source；
The wireless remote device to it is described it is each send corresponding difference from the BBU of clock source, the clock information of itself is adjusted to and the master clock by the corresponding difference for each BBU from clock source The clock information in source is synchronous, may include:
The wireless remote device each sends corresponding frame number difference and corresponding phase difference value from the BBU of clock source to described, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the corresponding frame number difference, and the corresponding phase difference value is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
Optionally, between above-mentioned Base Band Unit BBU on the basis of the synchronous method of clock corresponding second alternative embodiment, between Base Band Unit BBU provided in an embodiment of the present invention in 4th alternative embodiment of the synchronous method of clock, the wireless remote device obtains the clock information of master clock source, may include:
The wireless remote device obtains the radio frame number and phase of master clock source；
The wireless remote device is to each clock information for sending the master clock source from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the clock information of the master clock source, may include:
The wireless remote device is to each radio frame number and phase for sending the master clock source from the BBU of clock source, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the radio frame number of the master clock source, and the phase of the master clock source is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
Refering to Fig. 5, an embodiment of wireless remote device provided in an embodiment of the present invention includes:
Determination unit 201, for determining that the clock source of a BBU is master clock source from the multiple BBU connecting with the wireless remote device, the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU；
Acquiring unit 202, for obtaining the clock information for the master clock source that the determination unit 201 determines；
The clock information of synchronization unit 203, the master clock source for being obtained according to the acquiring unit 202 synchronizes each clock information from clock source.
In the embodiment of the present invention, determination unit 201 determines that the clock source of a BBU is master clock source from the multiple BBU connecting with the wireless remote device, the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU；Acquiring unit 202 obtains the clock information for the master clock source that the determination unit 201 determines；Synchronization unit 203 is according to the acquiring unit The clock information of 202 master clock sources obtained synchronizes each clock information from clock source.It can only be realized by increasing the mode of hardware with to realize the clock difference between BBU in the prior art, complexity is high to be compared, the embodiment of the present invention provides wireless remote device, it can be under the premise of not increasing hardware, with regard to realizing that the clock between BBU is same, to reduce the complexity that clock is synchronous between BBU, providing convenience property.
Optionally, on the basis of above-mentioned Fig. 5 corresponding embodiment, refering to Fig. 6, in first alternative embodiment of wireless remote device provided in an embodiment of the present invention,
The acquiring unit 202 is also used to obtain each clock information from clock source；
The synchronization unit 203 includes:
Subelement 2031 is determined, for determining the difference of each clock information from clock source of the acquisition of acquiring unit 202 and the clock information of the master clock source；
Transmission sub-unit 2032, for to each corresponding difference for sending the determination of determining subelement 2031 from the BBU of clock source, the clock information of itself to be adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the corresponding difference.
Optionally, on the basis of above-mentioned Fig. 5 corresponding embodiment, in second alternative embodiment of wireless remote device provided in an embodiment of the present invention,
The synchronization unit 203, specifically for the wireless remote device to each clock information for sending the master clock source from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the clock information of the master clock source.
Optionally, on the basis of above-mentioned Fig. 6 corresponding embodiment, in the third alternative embodiment of wireless remote device provided in an embodiment of the present invention,
The acquiring unit 202, radio frame number and phase and each radio frame number and phase from clock source specifically for acquisition master clock source；
The determining subelement 2031, specifically for determination each frame number difference and phase difference value between clock source and the master clock source, the frame number difference is the difference between each radio frame number from clock source and the radio frame number of the master clock source, and the phase difference value is the difference between each phase from clock source and the phase of the master clock source；
The transmission sub-unit 2032, specifically for it is described it is each send corresponding frame number difference and corresponding phase difference value from the BBU of clock source, the corresponding frame number difference is used for each BBU from clock source The radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source, the corresponding phase difference value is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
Optionally, on the basis of above-mentioned Fig. 5 corresponding second alternative embodiment, in the 4th alternative embodiment of wireless remote device provided in an embodiment of the present invention,
The acquiring unit 202, specifically for obtaining the radio frame number and phase of master clock source；
The synchronization unit 203, specifically for each radio frame number and phase for sending the master clock source from the BBU of clock source, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the radio frame number of the master clock source, and the phase of the master clock source is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
Wireless remote device provided in an embodiment of the present invention can the associated description refering to fig. 1 to the part Fig. 4 understood that this place, which is not done, excessively to be repeated.
Fig. 7 is the structural schematic diagram of wireless remote device 30 provided in an embodiment of the present invention.The wireless remote device 30 includes processor 310, memory 350 and input/output I/O equipment 330, and memory 350 may include read-only memory and random access memory, and provide operational order and data to processor 310.The a part of of memory 350 can also include nonvolatile RAM (NVRAM).
In some embodiments, memory 350 stores following element, executable modules or data structures perhaps their subset or their superset:
In embodiments of the present invention, by calling the operational order (operational order is storable in operating system) of the storage of memory 350,
The clock source that a BBU is determined from the multiple BBU connecting with the wireless remote device is master clock source, and the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU；
Obtain the clock information of master clock source；
Each clock information from clock source is synchronized according to the clock information of the master clock source.
Wireless remote device provided in an embodiment of the present invention can just realize that the clock between BBU is same, to reduce the complexity that clock is synchronous between BBU, providing convenience property under the premise of not increasing hardware.
Processor 310 controls the operation of wireless remote device 30, and processor 310 can also be known as CPU (Central Processing Unit, central processing unit).Memory 350 may include read-only memory and random access memory, and provide instruction and data to processor 310.The a part of of memory 350 can also include nonvolatile RAM (NVRAM).The various components of wireless remote device 30 are coupled by bus system 320 in specific application, and wherein bus system 320 can also include power bus, control bus and status signal bus in addition etc. in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 320 in figure.
The method that the embodiments of the present invention disclose can be applied in processor 310, or be realized by processor 310.Processor 310 may be a kind of IC chip, the processing capacity with signal.During realization, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 310 or the instruction of software form.Above-mentioned processor 310 can be general processor, digital signal processor (DSP), specific integrated circuit (ASIC), ready-made programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components.It may be implemented or execute disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be microprocessor or the processor is also possible to any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware decoding processor and execute completion, or in decoding processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, in the storage medium of this fields such as programmable read only memory or electrically erasable programmable memory, register maturation.The step of storage medium is located at memory 350, and processor 310 reads the information in memory 350, completes the above method in conjunction with its hardware.
Optionally, processor 310 is also used to obtain each clock information from clock source；
Determine the difference of the clock information of each clock information from clock source and the master clock source；
I/O equipment 330 be used for it is described it is each send corresponding difference from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the corresponding difference.
Optionally, I/O equipment 330 is used for each clock information for sending the master clock source from the BBU of clock source, and the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the clock information of the master clock source.
Optionally, processor 310 is also used to: obtaining the radio frame number and phase and each radio frame number and phase from clock source of master clock source；
Determine each frame number difference and phase difference value between clock source and the master clock source, the frame number difference is the difference between each radio frame number from clock source and the radio frame number of the master clock source, and the phase difference value is the difference between each phase from clock source and the phase of the master clock source；
I/O equipment 330 is used for described each from the BBU of the clock source corresponding frame number difference of transmission and corresponding phase difference value, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the corresponding frame number difference, and the corresponding phase difference value is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
Above wireless remote device 30 can the description refering to fig. 1 to the part Fig. 6 understood that this place, which is not done, excessively to be repeated.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is relevant hardware can be instructed to complete by program, the program can be stored in a computer readable storage medium, and storage medium may include: ROM, RAM, disk or CD etc..
Clock is synchronous between Base Band Unit method, apparatus and system is provided for the embodiments of the invention above to be described in detail, used herein a specific example illustrates the principle and implementation of the invention, and the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；At the same time, for those skilled in the art, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion the contents of this specification are not to be construed as limiting the invention.

Claims (13)

  1. A kind of synchronous method of clock between Base Band Unit BBU characterized by comprising
    Wireless remote device determines that the clock source of a BBU is master clock source from the multiple BBU connecting with the wireless remote device, and the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU；
    The wireless remote device obtains the clock information of master clock source；
    The wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source.
  2. The method according to claim 1, wherein when the wireless remote device obtains the clock information of master clock source, the method also includes:
    The wireless remote device obtains each clock information from clock source；
    The wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source, comprising:
    The wireless remote device determines the difference of the clock information of each clock information from clock source and the master clock source；
    The wireless remote device to it is described it is each send corresponding difference from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the corresponding difference.
  3. The method according to claim 1, wherein the wireless remote device synchronizes each clock information from clock source according to the clock information of the master clock source, comprising:
    The clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source to each clock information for sending the master clock source from the BBU of clock source, the clock information of the master clock source by the wireless remote device.
  4. According to the method described in claim 2, it is characterized in that, the wireless remote device obtains the clock information and each clock information from clock source of master clock source, comprising:
    The radio frame number and phase of the wireless remote device acquisition master clock source and each radio frame number and phase from clock source；
    The wireless remote device determines each clock information from clock source and the master clock source The difference of clock information, comprising:
    The wireless remote device determines each frame number difference and phase difference value between clock source and the master clock source, the frame number difference is the difference between each radio frame number from clock source and the radio frame number of the master clock source, and the phase difference value is the difference between each phase from clock source and the phase of the master clock source；
    The wireless remote device to it is described it is each send corresponding difference from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the corresponding difference, comprising:
    The wireless remote device each sends corresponding frame number difference and corresponding phase difference value from the BBU of clock source to described, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the corresponding frame number difference, and the corresponding phase difference value is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
  5. According to the method described in claim 3, it is characterized in that, the wireless remote device obtains the clock information of master clock source, comprising:
    The wireless remote device obtains the radio frame number and phase of master clock source；
    The wireless remote device is to each clock information for sending the master clock source from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the clock information of the master clock source, comprising:
    The wireless remote device is to each radio frame number and phase for sending the master clock source from the BBU of clock source, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the radio frame number of the master clock source, and the phase of the master clock source is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
  6. A kind of wireless remote device characterized by comprising
    Determination unit, for determining that the clock source of a BBU is master clock source from the multiple BBU connecting with the wireless remote device, the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU；
    Acquiring unit, for obtaining the clock information for the master clock source that the determination unit determines；
    The clock information of synchronization unit, the master clock source for being obtained according to the acquiring unit synchronizes respectively A clock information from clock source.
  7. Wireless remote device according to claim 6, which is characterized in that
    The acquiring unit is also used to obtain each clock information from clock source；
    The synchronization unit includes:
    Subelement is determined, for determining the difference of each clock information from clock source of the acquiring unit acquisition and the clock information of the master clock source；
    Transmission sub-unit, for to each corresponding difference for sending the determining subelement determination from the BBU of clock source, the clock information of itself to be adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the corresponding difference.
  8. Wireless remote device according to claim 6, which is characterized in that
    The synchronization unit, specifically for the wireless remote device to each clock information for sending the master clock source from the BBU of clock source, the clock information of itself is adjusted to synchronous with the clock information of the master clock source for each BBU from clock source by the clock information of the master clock source.
  9. Wireless remote device according to claim 7, which is characterized in that
    The acquiring unit, radio frame number and phase and each radio frame number and phase from clock source specifically for acquisition master clock source；
    The determining subelement, specifically for determination each frame number difference and phase difference value between clock source and the master clock source, the frame number difference is the difference between each radio frame number from clock source and the radio frame number of the master clock source, and the phase difference value is the difference between each phase from clock source and the phase of the master clock source；
    The transmission sub-unit, specifically for each sending corresponding frame number difference and corresponding phase difference value from the BBU of clock source to described, the radio frame number of itself is adjusted to synchronous with the radio frame number of the master clock source for each BBU from clock source by the corresponding frame number difference, and the corresponding phase difference value is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
  10. Wireless remote device according to claim 8, which is characterized in that
    The acquiring unit, specifically for obtaining the radio frame number and phase of master clock source；
    The synchronization unit, will be certainly for each BBU from clock source specifically for the radio frame number to each radio frame number and phase for sending the master clock source from the BBU of clock source, the master clock source The radio frame number of body is adjusted to synchronous with the radio frame number of the master clock source, and the phase of the master clock source is for each BBU from clock source by the phase adjustment of itself to the Phase synchronization with the master clock source.
  11. A kind of wireless remote device characterized by comprising input-output apparatus, memory and processor,
    The processor is for executing following steps:
    The clock source that a BBU is determined from the multiple BBU connecting with the wireless remote device is master clock source, and the clock source of other BBU is from clock source, and other BBU are the BBU in the multiple BBU in addition to one BBU；
    Obtain the clock information of master clock source；
    Each clock information from clock source is synchronized according to the clock information of the master clock source.
  12. The synchronous system of clock between a kind of Base Band Unit BBU, which is characterized in that include a RRU synchronous for clock including multiple Base Band Unit BBU and multiple wireless remote unit R RU, in the multiple RRU, the multiple BBU is connect with the multiple RRU；
    The RRU synchronous for clock is any wireless remote device of the claims 6-10.
  13. The synchronous system of clock between a kind of Base Band Unit BBU, which is characterized in that including multiple Base Band Unit BBU, multiple wireless remote unit R RU and RRU hubs, the multiple RRU is connect by the RRU hub with the BBU；
    Any wireless remote device of the RRU hub the claims 6-10.
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