CN102316576A - Wireless base station clock synchronization method and system thereof, base band frame and exchange frame - Google Patents
Wireless base station clock synchronization method and system thereof, base band frame and exchange frame Download PDFInfo
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Abstract
The invention provides a wireless base station clock synchronization method. The method comprises the following steps that: a frame is selected as an exchange frame from a wireless base station cluster system; the exchange frame generates a timing reference signal; the timing reference signal is coded in IQ data; the IQ data is sent to a base band frame; the base band frame recovers the timing reference signal from the IQ data, acquires a transmission time delay value of the base band frame and the exchange frame and compensates the recovered timing reference signal according to the transmission time delay value so that the compensated timing reference signal synchronizes with the timing reference signal of the exchange frame; the base band frame generates the timing reference signal which forms synchronization with itself according to the compensated timing reference signal. The invention also provides the wireless base station cluster system, the exchange frame and the base band frame. By using the method and the system, the wireless base station synchronization can be realized without increasing hardware and wiring resources.
Description
Technical field
The present invention relates to wireless communication field, during cluster shared baseband pond, especially a plurality of wireless base station, a kind of clock synchronizing method of wireless base station, system, base band frame and exchange frame.
Background technology
For the wireless base station, the wireless base station of part standard (like CDMA/TD-SCDMA) needs definitely align the time phase between the base station.And the wireless base station of part standard (like GSM/UMTS) only needs the base station system clock frequency equal basically, for time phase and do not require alignment.For the different clock request in base station, can to the wireless base station clock be provided through different time service schemes.For needing synchronous wireless base station time phase, can adopt time service schemes such as GPS, as shown in Figure 1.And for phase locked wireless base station between when not required, then can be through extracting clock in the transport service, as extracting line clock etc. in the E1 business.First kind of time service scheme need increase extra clock synchronization apparatus, like the GPS receiver, and GPS antenna feeder etc.Not only increase the equipment integral cost, the certain applications scene also exists installs GPS antenna feeder difficulty, the long situation of antenna feeder cable, for the base station time service brings difficulty.Second kind of time service scheme then can utilize the equipment of existing transmission to recover clock, need not increase extra time service equipment, and cost is lower.Therefore, phase locked wireless standard base station is adopted second kind of time service scheme mostly between when not required.
Application places for the wireless base station cluster; (Base Band Unit BBU) concentrates and places, and with Remote Radio Unit (Remote Radio Unit with the baseband processing unit of base station; RRU) distribution is placed, and passes through optical fiber exchange message (IQ data) between BBU and the RRU.Utilize one or more BBU machine frames to realize the equipment of a similar IQ data switching exchane; Can realize IQ data interaction between any two BBU and the RRU; Thereby realize sharing of baseband pool, be equal to a plurality of baseband processing unit resource-sharings, form a super big base station.As shown in Figure 4.
For this networking situation, even standard wireless base stations such as GSM/UMTS, though do not require that each base station is synchronous time phase.But because the BBU of a plurality of concentrated placements forms a super big base station, thereby require definitely align the time phase between these a plurality of BBU.Therefore for this networking situation, can adopt first kind of time service scheme mentioned above, but the unfavorable factor of aspects such as the cost that also need bear first kind of time service scheme simultaneously and brought, engineering.
Main synchronous in the prior art through two kinds of methods: the one, utilize gps system to give the base station time service, let all BBU be synchronized on the reference clock; The 2nd, increase extra clock cascade cable; Be delivered to other BBUs on through cable the time phase of a BBU; Other BBU are synchronized with the phase place that passes over, thereby reach all BBU Phase synchronization in the cluster, and these two kinds of methods all need extra increase equipment or cable.
Summary of the invention
The technical problem that the present invention will solve provides a kind of wireless base station clock synchronizing method, system, base band frame and exchange frame, realizes wireless base station group system clock synchronization, avoids increasing new equipment or cable.
In order to address the above problem, the invention provides a kind of wireless base station clock synchronizing method, comprising:
In the wireless base station group system, select frame frame in return, said exchange frame produces a timing reference signal, and said timing reference signal is coded in the IQ data, and said IQ data are sent to base band frame;
Said base band frame recovers timing reference signal from said IQ data; Obtain the propagation delay time value of said base band frame and exchange frame; According to the said timing reference signal that recovers of said propagation delay time value compensation; Make that the timing reference signal after the compensation is synchronous with the timing reference signal of said exchange frame, timing reference signal generation with it the synchronous timing reference signal of said base band frame after according to said compensation.
Further, said method also can have following characteristics, and said exchange frame produces a timing reference signal and comprises:
The said timing reference signal of system clock locking reference source clock generating of said exchange frame;
Wherein, said reference source clock is the reference source that information time phase can be provided, perhaps, and for the reference source of frequency information only is provided.
Further, said method also can have following characteristics, when being coded in said timing reference signal in the IQ data, also uses designated character to identify the position of said timing reference signal;
Said base band frame recovers timing reference signal and comprises from said IQ data:
Said base band frame is discerned said timing reference signal according to said designated character, recovers timing reference signal.
Further, said method also can have following characteristics, and the timing reference signal of said base band frame after according to this compensation produces the timing reference signal synchronous with it and comprise:
Said base band frame selects timing reference signal after the said compensation as the system-timing reference source; The timing reference signal of this frame generation and the timing reference signal after the said compensation are carried out phase demodulation, synchronous according to timing reference signal and the timing reference signal after the said compensation that this frame of identified result control produces.
The present invention also provides a kind of wireless base station group system; Comprise exchange frame and at least one base band frame; Said exchange frame comprises the first clock synchronization unit and at least one IQ crosspoint, and said base band frame comprises second clock lock unit and the 2nd IQ crosspoint, wherein:
The said first clock synchronization unit is used for: produce timing reference signal, send to a said IQ crosspoint;
A said IQ crosspoint is used for: said timing reference signal is coded in the IQ data, said IQ data are sent to base band frame;
Said the 2nd IQ crosspoint comprises clock recovery unit, time-delay measuring unit and clock compensation unit, wherein:
Said clock recovery unit is used for: receive the IQ data that said exchange frame sends, from said IQ data, recover timing reference signal;
Said time-delay measuring unit is used for: obtain the propagation delay time value of said base band frame and exchange frame, send to said clock compensation unit;
Said clock compensation unit is used for: according to the said timing reference signal that recovers of said propagation delay time value compensation; The timing reference signal after the feasible compensation and the timing reference signal of said exchange frame are synchronous, and the timing reference signal after the compensation is sent to said second clock lock unit;
Timing reference signal after said second clock lock unit compensates according to this produces the timing reference signal synchronous with it.
Further; Said system also can have following characteristics, and the said first clock synchronization unit is to be used for: the said timing reference signal of locking reference source clock generating, and said reference source clock is for providing the reference source of information time phase; Perhaps, for the reference source of frequency information only is provided.
Further, said system also can have following characteristics, and a said IQ crosspoint also is used for: when said timing reference signal is coded in the IQ data, use designated character to identify the position of said timing reference signal;
Said the 2nd IQ crosspoint also is used for: discern said timing reference signal according to said designated character, recover timing reference signal.
Further, said system also can have following characteristics, and said second clock lock unit comprises reference source selected cell, phase demodulation unit and clock generation unit:
Said reference source selected cell is used for: select timing reference signal after the said compensation as the reference signal of second clock lock unit;
Said phase demodulation unit is used for: the timing reference signal of said clock generation unit generation and the timing reference signal after the said compensation are carried out phase demodulation, export identified result to said clock generation unit;
Said clock generation unit is used for: generates timing reference signal and is sent to the phase demodulation unit, and, synchronous according to timing reference signal and the timing reference signal after the said compensation that said identified result control generates.
The present invention also provides a kind of wireless base station group system base band frame, and said base band frame comprises second clock lock unit and the 2nd IQ crosspoint, and said the 2nd IQ crosspoint comprises clock recovery unit, time-delay measuring unit and clock compensation unit, wherein:
Said clock recovery unit is used for: receive the IQ data that exchange frame sends, from said IQ data, recover timing reference signal;
Said time-delay measuring unit is used for: obtain the propagation delay time value of said base band frame and said exchange frame, send to said clock compensation unit;
Said clock compensation unit is used for: according to the said timing reference signal that recovers of said propagation delay time value compensation; The timing reference signal after the feasible compensation and the timing reference signal of said exchange frame are synchronous, and the timing reference signal after the compensation is sent to said second clock lock unit;
Said second clock lock unit is used for: produce the timing reference signal synchronous with it according to the timing reference signal after this compensation.
Wherein, said the 2nd IQ crosspoint is to be used for: discern said timing reference signal according to designated character, recover timing reference signal.
The present invention provides a kind of wireless base station group system exchange frame, and said exchange frame comprises the first clock synchronization unit and at least one IQ crosspoint, wherein:
The said first clock synchronization unit is used for: produce timing reference signal, send to a said IQ crosspoint;
A said IQ crosspoint is used for: said timing reference signal is coded in the IQ data, said IQ data are sent to base band frame.
Further, above-mentioned exchange frame also can have following characteristics, and a said IQ crosspoint also is used for: when said timing reference signal is coded in the IQ data, use designated character to identify the position of said timing reference signal.
According to the present invention, realized between each base band frame of cluster of base stations system that time phase is synchronous, utilizes existing hardware and interconnection resource just can realize that time phase is synchronous, need not increase new hardware and line; Contrast traditional time phase of synchronous time service scheme,, practiced thrift cost owing to need not to increase hardware and interconnection resource; The problem of having evaded in addition, the project installation difficulty that traditional time phase, synchronous time service scheme possibly introduced.
Description of drawings
Fig. 1 is a GPS time dissemination system sketch map;
Fig. 2 is a typical wireless base station framework;
Fig. 3 is a clock synchronization cell operation schematic block diagram;
Fig. 4 is a group system wireless base station framework;
Fig. 5 is a clock synchronizing method sketch map in wireless base station between embodiment of the invention group system;
Fig. 6 is an embodiment of the invention wireless base station clock synchronizing method flow chart;
Fig. 7 is an embodiment of the invention IQ crosspoint block diagram.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
The wireless base station group system comprises that at least one BBU unit is used for IQ exchanges data (hereinafter referred exchange frame), and a plurality of BBU unit is used for Base-Band Processing (hereinafter referred is a base band frame), and a plurality of RRU unit.In the exchange frame, comprise parts such as clock synchronization unit and a plurality of IQ crosspoints, also can comprise baseband processing unit, also can not comprise baseband processing unit.In the base band frame, comprise parts such as clock synchronization unit, baseband processing unit, IQ crosspoint.
The embodiment of the invention provides a kind of clock synchronizing method; Between the BBU machine frame, recover timing reference signal the mutual IQ data; The timing reference signal that recovers is as the reference source signal of the clock synchronization unit of this frame; This reference source signal of timing reference signal locking of this frame, thus make the timing reference signal of this frame be synchronized with another BBU machine frame.
The embodiment of the invention provides a kind of wireless base station clock synchronizing method, comprising:
In the wireless base station group system, select frame frame in return, said exchange frame produces a timing reference signal, and said timing reference signal is coded in the IQ data, and said IQ data are sent to base band frame;
Said base band frame recovers timing reference signal from said IQ data; Obtain the propagation delay time value of said base band frame and exchange frame; According to the said timing reference signal that recovers of said propagation delay time value compensation; The timing reference signal after the compensation and the timing reference signal of said exchange frame are synchronous, and the timing reference signal of said base band frame after according to said compensation produces the timing reference signal synchronous with it.
Wherein, timing reference signal of said exchange frame generation comprises:
The said timing reference signal of system clock locking reference source clock generating of said exchange frame;
Wherein, said reference source clock is the reference source that information time phase can be provided, perhaps, and for the reference source of frequency information only is provided.Such as, this reference source clock can be first kind reference source (GPS etc. can provide the reference source of phase information), also can be second type of reference source clock (from transport service, recover the clock of coming out, frequency information only is provided).Exchange frame also produces a frequency reference signal, and timing reference signal and frequency reference signal are sent to the IQ crosspoint.
Wherein, when said exchange frame is coded in said timing reference signal in the IQ data, also use designated character to identify the position of said timing reference signal;
Said base band frame recovers timing reference signal and comprises from said IQ data:
Said base band frame is discerned said timing reference signal according to said designated character, recovers timing reference signal.
The timing reference signal of said base band frame after according to this compensation produces the timing reference signal synchronous with it and comprises:
Said base band frame selects timing reference signal after the said compensation as the system-timing reference source; The timing reference signal of this frame generation and the timing reference signal after the said compensation are carried out phase demodulation, synchronous according to timing reference signal and the timing reference signal after the said compensation that this frame of identified result control produces.
Wherein, the IQ crosspoint of exchange frame is selected the work clock of frequency reference signal as the IQ data transmit-receive, selects the original position of timing reference signal as the IQ Frame, and identifies with designated character.Certainly, timing reference signal also can be as the original position of IQ frame, and the fixed position that is placed on the IQ Frame gets final product.
The timing reference signal that each base band frame produces the clock synchronization unit of this frame according to above-mentioned steps and the timing reference signal of exchange frame are synchronous, thereby make the Phase synchronization between each base band frame.
Further specify the present invention through embodiment below.
As shown in Figure 3; The clock synchronization unit comprises a reference source selected cell; Phase demodulation unit and clock generation unit, wherein, the clock generation unit comprises an algorithm controls unit, local crystal oscillator unit, counting unit and a phase-locked loop; Be used to form a basic phase-locked loop, the clock synchronization of controlling the generation of local crystal oscillator unit is in the external reference source signal.The clock signal of local crystal oscillator unit output produces a timing reference signal through counting unit, is synchronized with the external reference source signal, simultaneously through system clock frequency of phase-locked loop output.The clock synchronization unit sends to IQ crosspoint and baseband processing unit with the timing reference signal and the system clock frequency of its generation.
In the base band group system, there are one or more frames to serve as the equipment of a similar IQ switch function, the IQ crosspoint of other base band frames all is connected to exchange frame through optical fiber.If a plurality of IQ exchange frames are arranged, also need link together between each exchange frame through optical fiber.Through this annexation, can the IQ data of any one baseband processing unit are mutual with any one RRU unit, thus realize that a plurality of RRU share the function of baseband pool.As shown in Figure 4.
The present invention is through a kind of clock synchronizing method; Timing reference signal with each BBU machine frame of a base band group system; Be synchronized with the timing reference signal of one of them exchange frame, thereby make the timing reference signal of each BBU machine frame in the cluster of base stations system synchronous.Concrete performing step is as shown in Figure 6, comprising:
Step 601: select the timing signal benchmark of an exchange frame as the cluster of base stations system, the clock synchronization unit of this exchange frame obtains a stable system works frequency and a timing reference signal through the locking external reference source.This timing reference signal can be synchronized with an absolute time, like gps time; Also can be asynchronous in an absolute time coordinate.As for the UMTS system, this timing reference signal can be the clock of 10ms for a cycle at random time phase.A-signal like Fig. 5.The clock synchronization unit of exchange frame sends to timing reference signal the baseband processing unit and the IQ crosspoint of this frame.
Step 602: the IQ crosspoint of exchange frame in the IQ data with the position of a designated character (K sign indicating number) sign timing reference signal.B signal like Fig. 5.
Step 603: measure the propagation delay time value between the IQ crosspoint of base band frame IQ crosspoint and exchange frame through a time-delay measuring unit.
Step 604: the IQ crosspoint of base band frame receives the IQ data of exchange frame, and the C signal like Fig. 5 identifies designated character.
Step 605: the IQ crosspoint of base band frame produces one and the synchronous timing reference signal of exchange frame timing reference signal according to designated character position of identifying and the propagation delay time value that measures.Like the D signal among Fig. 5.
Step 606: the timing reference signal that the IQ crosspoint of base band frame produces, as the external reference source signal of the clock synchronization unit of base band frame.This reference source signal of clock synchronization unit locking of base band frame, the timing reference signal of controlling its output is synchronized with reference source signal fully, like the E signal among Fig. 5.Clock synchronizing method is identical with step 601.The phase demodulation unit can belong to Physical board at the IQ crosspoint, and the phase demodulation value is returned the Physical board to place, clock synchronization unit.The phase demodulation unit also can be at the Physical board at place, clock synchronization unit, and the veneer at IQ crosspoint place returns the Physical board to place, clock synchronization unit with the timing reference signal that recovers.
Through above each step, can make the timing reference signal of each base band frame be synchronized with the timing reference signal of exchange frame, thereby make the timing reference signal of each base band frame and exchange frame synchronous fully.
The embodiment of the invention also provides a kind of wireless base station group system; Comprise exchange frame and at least one base band frame; Said exchange frame comprises the first clock synchronization unit and at least one IQ crosspoint, and said base band frame comprises second clock lock unit and the 2nd IQ crosspoint, wherein:
The said first clock synchronization unit is used for: produce timing reference signal, send to a said IQ crosspoint;
A said IQ crosspoint is used for: said timing reference signal is coded in the IQ data, said IQ data are sent to base band frame;
Said the 2nd IQ crosspoint comprises clock recovery unit, time-delay measuring unit and clock compensation unit, and is as shown in Figure 7, wherein:
Said clock recovery unit is used for: receive the IQ data that said exchange frame sends, from said IQ data, recover timing reference signal;
Said time-delay measuring unit is used for: obtain the propagation delay time value of said base band frame and exchange frame, send to said clock compensation unit;
Said clock compensation unit is used for: according to the said timing reference signal that recovers of said propagation delay time value compensation; The timing reference signal after the feasible compensation and the timing reference signal of said exchange frame are synchronous, and the timing reference signal after the compensation is sent to said second clock lock unit;
Timing reference signal after said second clock lock unit compensates according to this produces the timing reference signal synchronous with it.
Wherein, the said first clock synchronization unit is to be used for: the said timing reference signal of locking reference source clock generating, said reference source clock are the reference source that information time phase can be provided, perhaps, and for the reference source of frequency information only is provided.
Wherein, a said IQ crosspoint also is used for: use designated character to identify the position of said timing reference signal;
Said the 2nd IQ crosspoint also is used for: discern said timing reference signal according to said designated character, recover timing reference signal.
Wherein, said second clock lock unit comprises reference source selected cell, phase demodulation unit and clock generation unit, and is as shown in Figure 7:
Said reference source selected cell is used for: select timing reference signal after the said compensation as the reference signal of second clock lock unit;
Said phase demodulation unit is used for: the timing reference signal of said clock generation unit generation and the timing reference signal after the said compensation are carried out phase demodulation, export identified result to said clock generation unit;
Said clock generation unit is used for: generates timing reference signal and is sent to the phase demodulation unit, and, synchronous according to timing reference signal and the timing reference signal after the said compensation that said identified result control generates.
The embodiment of the invention also provides a kind of wireless base station group system base band frame; Said base band frame comprises second clock lock unit and the 2nd IQ crosspoint; Said the 2nd IQ crosspoint comprises clock recovery unit, time-delay measuring unit and clock compensation unit, wherein:
Said clock recovery unit is used for: receive the IQ data that said exchange frame sends, from said IQ data, recover timing reference signal;
Said time-delay measuring unit is used for: obtain the propagation delay time value of said base band frame and exchange frame, send to said clock compensation unit;
Said clock compensation unit is used for: according to the said timing reference signal that recovers of said propagation delay time value compensation; The timing reference signal after the feasible compensation and the timing reference signal of said exchange frame are synchronous, and the timing reference signal after the compensation is sent to said second clock lock unit;
Said second clock lock unit is used for: produce the timing reference signal synchronous with it according to the timing reference signal after this compensation.
Wherein, said clock recovery unit is to be used for: discern said timing reference signal according to designated character, recover timing reference signal.
The embodiment of the invention also provides a kind of exchange frame, comprises the above-mentioned first clock synchronization unit and at least one IQ crosspoint.
In another embodiment of the present invention, exchange frame can be measured the propagation delay time value of base band frame and exchange frame, sends the IQ Frame in advance according to the propagation delay time value that measures, and guarantees that the timing reference signal that base band frame recovers out aligns with exchange frame.
Certainly; Method of the present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (12)
1. a wireless base station clock synchronizing method is characterized in that, comprising:
In the wireless base station group system, select frame frame in return, said exchange frame produces a timing reference signal, and said timing reference signal is coded in the IQ data, and said IQ data are sent to base band frame;
Said base band frame recovers timing reference signal from said IQ data; Obtain the propagation delay time value of said base band frame and exchange frame; According to the said timing reference signal that recovers of said propagation delay time value compensation; Make that the timing reference signal after the compensation is synchronous with the timing reference signal of said exchange frame, timing reference signal generation with it the synchronous timing reference signal of said base band frame after according to said compensation.
2. the method for claim 1 is characterized in that, said exchange frame produces a timing reference signal and comprises:
The said timing reference signal of system clock locking reference source clock generating of said exchange frame;
Wherein, said reference source clock is the reference source that information time phase can be provided, perhaps, and for the reference source of frequency information only is provided.
3. the method for claim 1 is characterized in that, when being coded in said timing reference signal in the IQ data, also uses designated character to identify the position of said timing reference signal;
Said base band frame recovers timing reference signal and comprises from said IQ data:
Said base band frame is discerned said timing reference signal according to said designated character, recovers timing reference signal.
4. like claim 1,2 or 3 described methods, it is characterized in that the timing reference signal of said base band frame after according to this compensation produces the timing reference signal synchronous with it and comprise:
Said base band frame selects timing reference signal after the said compensation as the system-timing reference source; The timing reference signal of this frame generation and the timing reference signal after the said compensation are carried out phase demodulation, synchronous according to timing reference signal and the timing reference signal after the said compensation that this frame of identified result control produces.
5. wireless base station group system; It is characterized in that comprise exchange frame and at least one base band frame, said exchange frame comprises the first clock synchronization unit and at least one IQ crosspoint; Said base band frame comprises second clock lock unit and the 2nd IQ crosspoint, wherein:
The said first clock synchronization unit is used for: produce timing reference signal, send to a said IQ crosspoint;
A said IQ crosspoint is used for: said timing reference signal is coded in the IQ data, said IQ data are sent to base band frame;
Said the 2nd IQ crosspoint comprises clock recovery unit, time-delay measuring unit and clock compensation unit, wherein:
Said clock recovery unit is used for: receive the IQ data that said exchange frame sends, from said IQ data, recover timing reference signal;
Said time-delay measuring unit is used for: obtain the propagation delay time value of said base band frame and exchange frame, send to said clock compensation unit;
Said clock compensation unit is used for: according to the said timing reference signal that recovers of said propagation delay time value compensation; The timing reference signal after the feasible compensation and the timing reference signal of said exchange frame are synchronous, and the timing reference signal after the compensation is sent to said second clock lock unit;
Timing reference signal after said second clock lock unit compensates according to this produces the timing reference signal synchronous with it.
6. system as claimed in claim 5; It is characterized in that the said first clock synchronization unit is to be used for: the said timing reference signal of locking reference source clock generating, said reference source clock is for providing the reference source of information time phase; Perhaps, for the reference source of frequency information only is provided.
7. system as claimed in claim 5 is characterized in that,
A said IQ crosspoint also is used for: when said timing reference signal is coded in the IQ data, use designated character to identify the position of said timing reference signal;
Said the 2nd IQ crosspoint also is used for: discern said timing reference signal according to said designated character, recover timing reference signal.
8. like claim 5,6 or 7 described systems, it is characterized in that said second clock lock unit comprises reference source selected cell, phase demodulation unit and clock generation unit:
Said reference source selected cell is used for: select timing reference signal after the said compensation as the reference signal of second clock lock unit;
Said phase demodulation unit is used for: the timing reference signal of said clock generation unit generation and the timing reference signal after the said compensation are carried out phase demodulation, export identified result to said clock generation unit;
Said clock generation unit is used for: generates timing reference signal and is sent to the phase demodulation unit, and, synchronous according to timing reference signal and the timing reference signal after the said compensation that said identified result control generates.
9. a wireless base station group system base band frame is characterized in that, said base band frame comprises second clock lock unit and the 2nd IQ crosspoint, and said the 2nd IQ crosspoint comprises clock recovery unit, time-delay measuring unit and clock compensation unit, wherein:
Said clock recovery unit is used for: receive the IQ data that exchange frame sends, from said IQ data, recover timing reference signal;
Said time-delay measuring unit is used for: obtain the propagation delay time value of said base band frame and said exchange frame, send to said clock compensation unit;
Said clock compensation unit is used for: according to the said timing reference signal that recovers of said propagation delay time value compensation; The timing reference signal after the feasible compensation and the timing reference signal of said exchange frame are synchronous, and the timing reference signal after the compensation is sent to said second clock lock unit;
Said second clock lock unit is used for: produce the timing reference signal synchronous with it according to the timing reference signal after this compensation.
10. base band frame as claimed in claim 9 is characterized in that, said the 2nd IQ crosspoint is to be used for: discern said timing reference signal according to designated character, recover timing reference signal.
11. a wireless base station group system exchange frame is characterized in that, said exchange frame comprises the first clock synchronization unit and at least one IQ crosspoint, wherein:
The said first clock synchronization unit is used for: produce timing reference signal, send to a said IQ crosspoint;
A said IQ crosspoint is used for: said timing reference signal is coded in the IQ data, said IQ data are sent to base band frame.
12. exchange frame as claimed in claim 11 is characterized in that,
A said IQ crosspoint also is used for: when said timing reference signal is coded in the IQ data, use designated character to identify the position of said timing reference signal.
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| CN103152118A (en) * | 2013-02-07 | 2013-06-12 | 中兴通讯股份有限公司 | Base band unit and remote radio unit data service synchronization method, device and system |
| WO2017096557A1 (en) * | 2015-12-09 | 2017-06-15 | 华为技术有限公司 | Method, device, and system for clock synchronization among base band units |
| CN108029083A (en) * | 2015-07-17 | 2018-05-11 | 瑞典爱立信有限公司 | The synchronization of wireless base station |
| CN113556160A (en) * | 2020-04-23 | 2021-10-26 | 华为技术有限公司 | LTE and NR system signal processing method, device, equipment, terminal and storage medium |
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| CN101039154A (en) * | 2006-03-15 | 2007-09-19 | 大唐移动通信设备有限公司 | Method for obtaining transceiver channel transmission time of user terminal |
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| CN103152118B (en) * | 2013-02-07 | 2015-08-12 | 中兴通讯股份有限公司 | A kind of Base Band Unit and radio frequency unit data service synchronization, device and system |
| CN108029083A (en) * | 2015-07-17 | 2018-05-11 | 瑞典爱立信有限公司 | The synchronization of wireless base station |
| WO2017096557A1 (en) * | 2015-12-09 | 2017-06-15 | 华为技术有限公司 | Method, device, and system for clock synchronization among base band units |
| CN113556160A (en) * | 2020-04-23 | 2021-10-26 | 华为技术有限公司 | LTE and NR system signal processing method, device, equipment, terminal and storage medium |
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