CN101394244A - Non-homogeneous time clock region frame synchronization signal generating method in time division base station system - Google Patents
Non-homogeneous time clock region frame synchronization signal generating method in time division base station system Download PDFInfo
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- CN101394244A CN101394244A CNA2007100771875A CN200710077187A CN101394244A CN 101394244 A CN101394244 A CN 101394244A CN A2007100771875 A CNA2007100771875 A CN A2007100771875A CN 200710077187 A CN200710077187 A CN 200710077187A CN 101394244 A CN101394244 A CN 101394244A
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Abstract
The invention discloses a method for generating heterologous clock domain frame synchronization signals in a time division base station system. The method comprises the following steps: 1. generating a signal synchronized to the clock of the clock domain according to the reference frame synchronization signal; 2. according to the clock of the clock domain, counting the effective part of the signal synchronized to the clock of the clock domain by a first counter, and generating a monocyclic pulse frame header as the frame synchronization signal of the clock domain when the value of the first counter reaches the first pre-set value; 3. according to the clock of the clock domain, counting the monocyclic pulse frame header of the clock domain by a second counter, and generating an enable signal when the value of the second counter exceeds the threshold value of the second counter; and 4. according to the enable signal, calibrating a time sequence coordinate of the clock domain by the monocyclic pulse frame header. The invention stabilizes the frame synchronization signal generation of each clock domain, and solves the drift problem of the heterologous clock domain frame synchronization signals in the time division base station system.
Description
Technical field
The present invention relates to a kind of production method of frame synchronizing signal, the production method of non-homogeneous clock region frame synchronization signal in especially a kind of time-division base station system.
Background technology
In existing time-division base station system design, base station system often has the different requirements of the clock network of more complicated with message data rate in the adaptive system.Like this, for frame synchronizing signal unique in the base station system, just produced the problem of different clock-domains: when the different clock-domains Data transmission, need be reference all generally with the reference frame synchronizing signal, if the reference frame synchronizing signal is sampled with different clocks, because each clock is with respect to reference frame synchronizing signal homology not necessarily, therefore the situation of clock sampling when reference frame synchronizing signal metastable state can appear, thereby there is drift phenomenon in the frame synchronizing signal that causes different clock-domains to be taken a sample separately producing, thereby causes realizing the accurate timing of base station system.
Summary of the invention
The technical problem to be solved in the present invention provides the production method of non-homogeneous clock region frame synchronization signal in a kind of time-division base station system of the drifting problem that can solve the non-homogeneous clock region frame synchronization signal of time-division base station system.
The technical solution adopted for the present invention to solve the technical problems is:
The production method of non-homogeneous clock region frame synchronization signal in a kind of time-division base station system may further comprise the steps:
1.1 according to the signal of reference frame synchronizing signal generation with the clock synchronization of this clock zone;
1.2 according to the clock of this clock zone the live part of the signal of the clock synchronization of described and this clock zone is counted by first counter, when the value of described first counter reaches first preset value, produce the frame synchronizing signal of this clock zone monocycle impulse frame head as this clock zone;
1.3 described clock zone monocycle impulse frame head counted according to the clock of this clock zone by second counter, when the value of described second counter surpasses the threshold value of described second counter, produced enable signal;
1.4 according to described enable signal, by of the sequential coordinate calibration of described monocycle impulse frame head to this clock zone.
In the such scheme, in the described step 1.4, when described enable signal was effective, described sequential coordinate was by the initialization of described monocycle impulse frame head; After described enable signal was invalid, if described sequential coordinate surpasses default adjusting range, described monocycle impulse frame head was proofreaied and correct described sequential coordinate, otherwise described sequential coordinate carries out work according to existing coordinate.
In the such scheme, described reference frame synchronizing signal and described clock zone are non-homogeneous.
In the such scheme, described second counter is promptly to start working after described time-division base station system powers on, and initial value is 0.
In the such scheme, the threshold value of described first counter is greater than the effective time of the signal of the clock synchronization of described and this clock zone and the amassing of clock frequency of described clock zone, and described first preset value is less than the threshold value of described first counter.
In the such scheme, the signal of the clock synchronization of described and this clock zone is that the clock of this clock zone is sampled to described reference frame synchronizing signal and obtained.
In the such scheme, the signal of the clock synchronization of described and this clock zone is that high level is effective, and described enable signal is that high level is effective.
Beneficial effect of the present invention mainly shows: technical scheme provided by the invention is in the frame synchronizing signal generation mechanism of each clock zone of the non-homogeneous clock zone of base station system; increased the certain protection measure; reduced the sensitivity that frame synchronizing signal produces; thereby stablized the generation of each clock region frame synchronization signal, solved the drifting problem of the non-homogeneous clock region frame synchronization signal of time-division base station system.
Description of drawings
Fig. 1 is the production method flow chart of non-homogeneous clock region frame synchronization signal in the time-division base station system of the present invention;
Fig. 2 is the sequential schematic diagram of one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, be that the 62.5MHz clock zone is that the invention will be further described for example with this clock zone.
With reference to Fig. 1, the production method of non-homogeneous clock region frame synchronization signal in a kind of time-division base station system may further comprise the steps:
Step 101: this clock zone clock obtains signal frame_flag_d with the clock synchronization of this clock zone to reference frame synchronizing signal frame_flag sampling, and wherein, frame_flag and this clock zone are non-homogeneous;
Step 102: the live part of frame_flag_d is counted according to the clock of this clock zone by first counter cnt 1, effective when frame_flag_d is high level; The threshold value Na of first counter cnt 1 greater than frame_flag_d effective time Ta and the clock frequency 62.5MHz of this clock zone long-pending; When the value of CNT1 reaches the first preset value C1, produce the frame synchronizing signal of this clock zone monocycle impulse frame head frame_s, wherein C1＜Na as this clock zone;
Step 103: according to the clock of this clock zone frame_s is counted by second counter cnt 2; Wherein, CNT2 promptly starts working after powering on for the time-division base station system, and initial value is 0, the time that its threshold value will be aspired for stability greater than powering on from system and the merchant in frame period; When the value of CNT2 surpasses its threshold value, produce enable signal EN, EN was effective when EN was high level;
Step 104: according to EN, by the sequential coordinate calibration of frame_s to this clock zone, concrete operation method is as follows: when EN was effective, the sequential coordinate was by the frame_s initialization; After EN was invalid, promptly after the system start-up, if the sequential coordinate surpasses default adjusting range, frame_s proofreaied and correct this sequential coordinate, otherwise this sequential coordinate carries out work according to existing coordinate.
With reference to Fig. 2, clk_62m5 is another clock with respect to the system clock territory, frame_flag is the 10ms reference frame synchronizing signal with the system clock homology, frame_flag_d is the frame synchronizing signal of the clk_62m5 clock zone that obtains with clk_62m5 sampling frame_flag, because the clk_62m5 clock zone is with system clock is non-homogeneous and phase place is not fixed, cause instability so when sampling frame_flag, may sample its rising edge, the dash area of frame_flag_d is promptly represented unsettled situation among the figure, this part may also may be low level for high level, the high level counting of CNT1 to frame_flag_d, when it reaches the first preset value C1, produce the frame synchronizing signal of this clock zone monocycle impulse frame head frame_s as the clk_62m5 clock zone, CNT2 is the counter that frame_s is counted, after powering on, system promptly starts working, when CNT2 arrives the second preset value C2, stop counting, and produce enable signal EN.
Claims (7)
1, the production method of non-homogeneous clock region frame synchronization signal in a kind of time-division base station system is characterized in that, may further comprise the steps:
1.1 according to the signal of reference frame synchronizing signal generation with the clock synchronization of this clock zone;
1.2 according to the clock of this clock zone the live part of the signal of the clock synchronization of described and this clock zone is counted by first counter, when the value of described first counter reaches first preset value, produce the frame synchronizing signal of this clock zone monocycle impulse frame head as this clock zone;
1.3 described clock zone monocycle impulse frame head counted according to the clock of this clock zone by second counter, when the value of described second counter surpasses the threshold value of described second counter, produced enable signal;
1.4 according to described enable signal, by of the sequential coordinate calibration of described monocycle impulse frame head to this clock zone.
2, the production method of non-homogeneous clock region frame synchronization signal in the time-division base station system as claimed in claim 1 is characterized in that: in the described step 1.4, when described enable signal was effective, described sequential coordinate was by the initialization of described monocycle impulse frame head; After described enable signal was invalid, if described sequential coordinate surpasses default adjusting range, described monocycle impulse frame head was proofreaied and correct described sequential coordinate, otherwise described sequential coordinate carries out work according to existing coordinate.
3, the production method of non-homogeneous clock region frame synchronization signal in the time-division base station system as claimed in claim 1 or 2, it is characterized in that: described reference frame synchronizing signal and described clock zone are non-homogeneous.
4, the production method of non-homogeneous clock region frame synchronization signal in the time-division base station system as claimed in claim 3 is characterized in that: described second counter is promptly to start working after described time-division base station system powers on, and initial value is 0.
5, the production method of non-homogeneous clock region frame synchronization signal in the time-division base station system as claimed in claim 4, it is characterized in that: the threshold value of described first counter is greater than the effective time of the signal of the clock synchronization of described and this clock zone and the amassing of clock frequency of described clock zone, and described first preset value is less than the threshold value of described first counter.
6, the production method of non-homogeneous clock region frame synchronization signal in the time-division base station system as claimed in claim 5 is characterized in that: the signal of the clock synchronization of described and this clock zone is that the clock of this clock zone is sampled to described reference frame synchronizing signal and obtained.
7, the production method of non-homogeneous clock region frame synchronization signal in the time-division base station system as claimed in claim 6 is characterized in that: the signal of the clock synchronization of described and this clock zone is that high level is effective, and described enable signal is that high level is effective.
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Cited By (5)
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| CN101764663B (en) * | 2009-12-25 | 2013-06-05 | 福建星网锐捷网络有限公司 | Synchronous processing method, synchronous processing system for centralized type voice and voice communication processing equipment |
| CN105353300A (en) * | 2015-10-21 | 2016-02-24 | 珠海格力电器股份有限公司 | AC contactor detection method and system |
| CN107749787A (en) * | 2017-09-27 | 2018-03-02 | 全球能源互联网研究院有限公司 | Synchronizing signal generating method, apparatus and system |
| CN107835440A (en) * | 2017-11-06 | 2018-03-23 | 上海航天测控通信研究所 | A kind of multi-channel high-speed bitstreams switching method based on FPGA |
| CN111381487A (en) * | 2018-12-29 | 2020-07-07 | 阿里巴巴集团控股有限公司 | Multi-sensor synchronous time service system, method and device and electronic equipment |
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| WO2004100000A1 (en) * | 2003-05-09 | 2004-11-18 | Koninklijke Philips Electronics N.V. | Method for data signal transfer across different clock-domains |
| CN1812319B (en) * | 2005-01-26 | 2010-04-14 | 华为技术有限公司 | Apparatus for realizing asynchronous data cross clock domain |
| CN1848713B (en) * | 2005-11-17 | 2010-08-11 | 华为技术有限公司 | Time division multiplexing system minor node frame synchronization realizing method and apparatus |
| CN100512007C (en) * | 2006-08-08 | 2009-07-08 | 华为技术有限公司 | Method and device for clock detection |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764663B (en) * | 2009-12-25 | 2013-06-05 | 福建星网锐捷网络有限公司 | Synchronous processing method, synchronous processing system for centralized type voice and voice communication processing equipment |
| CN105353300A (en) * | 2015-10-21 | 2016-02-24 | 珠海格力电器股份有限公司 | AC contactor detection method and system |
| CN105353300B (en) * | 2015-10-21 | 2018-04-20 | 珠海格力电器股份有限公司 | A.C. contactor detection method and system |
| CN107749787A (en) * | 2017-09-27 | 2018-03-02 | 全球能源互联网研究院有限公司 | Synchronizing signal generating method, apparatus and system |
| CN107835440A (en) * | 2017-11-06 | 2018-03-23 | 上海航天测控通信研究所 | A kind of multi-channel high-speed bitstreams switching method based on FPGA |
| CN111381487A (en) * | 2018-12-29 | 2020-07-07 | 阿里巴巴集团控股有限公司 | Multi-sensor synchronous time service system, method and device and electronic equipment |
| CN111381487B (en) * | 2018-12-29 | 2022-01-11 | 阿里巴巴集团控股有限公司 | Multi-sensor synchronous time service system, method and device and electronic equipment |
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