CN101365180A - Information sending method and apparatus - Google Patents
Information sending method and apparatus Download PDFInfo
- Publication number
- CN101365180A CN101365180A CNA2008102162024A CN200810216202A CN101365180A CN 101365180 A CN101365180 A CN 101365180A CN A2008102162024 A CNA2008102162024 A CN A2008102162024A CN 200810216202 A CN200810216202 A CN 200810216202A CN 101365180 A CN101365180 A CN 101365180A
- Authority
- CN
- China
- Prior art keywords
- radio equipment
- clock
- equipment controller
- benchmark
- cascade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The invention discloses a method and a system for sending information. The method comprises the following steps: when at least two wireless equipment controllers are in a cascaded connection through the CPRI link, selecting one controller as a benchmark wireless equipment controller, and sending the clock and synchronization information through an independent physical channel to other wireless equipment controllers by the benchmark wireless equipment control device. The system comprises at least two wireless equipment controllers in the cascaded connection through the CPRI link; the independent physical channel is arranged between wireless equipment controllers; and the wireless equipment controllers send the clock and synchronization information through the independent physical channel. The system can directly send the clock and synchronization information through the independent physical channel from the clock module, thereby simplifying the system; the system also ensures that the clocks on two sides are synchronous and the data sampling errors can not occur during the long-time mutual transmission of the CPRI ports on two sides; and the system can also reduce the complexity of the clock design and improve the stability of the entire system.
Description
Technical field
The present invention relates to the communications field, particularly a kind of method for sending information and device.
Background technology
Existing base station system can comprise two parts, radio equipment controller, for example REC (Radioequipment controller) and wireless device part, for example RE (Radio equipment).Can pass through CPRI (Common Public Radio Interface, common public radio interface) between radio equipment controller and the wireless device and interconnect, also can carry out cascade between the different radio equipment controllers by the CPRI interface.In wireless communication system, wireless device needs the reference clock of a stable clock as radio-frequency module, and this clock is generally provided by radio equipment controller.When the radio equipment controller cascade, for example REC1 and REC2 cascade, the consistency of clock and synchronous between needs maintenance REC1, REC2, the RE three, usually RE extracts the clock of coupled REC as the radio frequency operation clock from the CPRI interface, the clock of REC then carries out between the base band of two REC synchronously, one of them REC normally, REC1 for example, the clock source is provided, another REC, REC2 for example extracts the clock of REC1, the horizontal lock of going forward side by side synchronously and metadata cache, carry out the frame transmission of aliging with the data of this locality again by CPRI.The inventor finds in realizing process of the present invention, among the REC of cascade, there is not the REC of reference clock source to have clock and the synchronizing information of the REC of reference clock source from the CPRI extraction, increase the complexity that REC realizes, simultaneously during the CPRI link failure, do not have the REC of reference clock source can't obtain clock and synchronizing information, the stability of system and the operate as normal of equipment will be affected.
Summary of the invention
Embodiment of the invention technical problem to be solved is to provide a kind of method for sending information and device.
The method that the embodiment of the invention provided comprises: when at least two radio equipment controllers pass through the cascade of common public radio interface link, select one of them radio equipment controller as the benchmark radio equipment controller, its clock and synchronizing information are sent to other radio equipment controllers with its cascade by physical channel independently by described benchmark radio equipment controller.
The system that the embodiment of the invention provides comprises: the radio equipment controller of at least two cascades, pass through the cascade of common public radio interface link between the described radio equipment controller, also comprise independently physical channel between the described radio equipment controller, described radio equipment controller transmits clock and synchronizing information by described independently physical channel.Compared with prior art, the embodiment of the invention can guarantee that the long-time mutual biography of both sides CPRI interface can be because of the asynchronous data sampling mistake that produces in the clock synchronization that guarantees both sides.In addition, the scheme of the embodiment of the invention can be separated the system's master clock and the business clock of radio equipment controller, and the business clock of radio equipment controller can be locked the system clock of benchmark radio equipment controller, thereby has reduced the clock design complexities.Simultaneously, the CPRI link breaks down between the equipment in cascade, for example take place to dodge when breaking, because the embodiment of the invention has adopted special physical channel transmission clock and synchronizing information, thereby the clock of each equipment and synchro system still can steady operations, strengthened the stability of entire system, also reduced of the influence of CPRI link failure other module of system.
Description of drawings
Fig. 1 is the method flow diagram of one embodiment of the invention;
Fig. 2 is the system schematic of one embodiment of the invention;
Fig. 3 is the system schematic of another embodiment of the present invention;
Fig. 4 is the system schematic of another embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiments of the invention are described in further detail below in conjunction with accompanying drawing.
Embodiment one
Present embodiment provides a kind of method for sending information, specifically comprise: when several radio equipment controllers pass through common public radio interface link (CPRI) cascade, as the benchmark radio equipment controller, its clock and synchronizing information are sent to other radio equipment controllers of cascade with one of them radio equipment controller by the benchmark radio equipment controller by physical channel independently.In this way, can be operated in identical clock between the radio equipment controller of cascade and sync-body is fastened.Present embodiment is for the radio equipment controller of receive clock and synchronizing information, can directly transmit described clock and synchronizing information by clock module by physical channel independently, radio equipment controller extracts reference clock and synchronizing information by CPRI in the prior art, has simplified system's realization.Transmit for clock signal of system, because the CPRI interface is the synchronous driving mode, if the radio equipment controller clock on both sides is inconsistent when utilizing the CPRI interface to transmit in the prior art, for example frequency has deviation slightly, the data sampling mistake will occur after a period of time.And the method for present embodiment has been owing to adopted independently the physical channel to come the transmission clock synchronizing information, thereby can be in the clock synchronization that guarantees both sides, and guaranteeing both sides CPRI interface, long-time biography can be because of the asynchronous data sampling mistake that produces mutually.In addition, the scheme of present embodiment can be separated the system's master clock and the business clock of radio equipment controller, and the business clock of radio equipment controller can be locked the system clock of benchmark radio equipment controller, thereby has reduced the clock design complexities.Simultaneously, the CPRI link breaks down between the equipment in cascade, for example take place to dodge when breaking, because present embodiment has adopted special physical channel transmission clock and synchronizing information, thereby the clock of each equipment and synchro system still can steady operations, strengthened the stability of entire system, also reduced of the influence of CPRI link failure other module of system.
Embodiment two
In the present embodiment, radio equipment controller is an example with REC1, REC2 respectively, realizes cascade by the CPRI link between REC1 and the REC2.Wherein, REC1 and REC2 can be the radio equipment controllers of supporting the different communication standard, and for example, REC1 supports the WCDMA standard, and REC2 supports the GSM standard.As shown in Figure 1, present embodiment may further comprise the steps:
S1 selects a REC in the REC of cascade, REC1 for example is as reference device;
The system of selection of reference device has a variety of, can select by configuration parameter, also can be by selecting to determine reference device by auto-negotiation between the equipment.
In addition, can also as required selected reference device be used reference device as the master, selected again at least one REC is as standby reference device.When wherein main with reference device barrier or other reasons and when clock and/or synchronizing information can't be provided accurately for some reason, can also switch standby reference device is upgraded to and mainly use reference device, thus the reliability of elevator system.
In general, the REC that can select to have accurate clock source is as reference device, and wherein the clock source can be by the clock that follow the tracks of in the local clock source and locked in line extracts, perhaps gps clock, and perhaps the external dedicated clock produces.
S2, REC1 sends to REC2 by physical channel independently with clock and synchronizing signal;
Here said independently physical channel both can be the passage of transmission clock and synchronisation source only, also can not limit clock and synchronisation source only are provided, as long as be different from the CPRI link and be the independently physical channel that transmission clock and synchronizing information are arranged.Simultaneously, the physical channel here also is not limited to common cable connection or optical cable connection etc., according to different scenes multiple implementation can be arranged.For example, can utilize interconnected clock distribution conduct independently physical channel transfer clock and synchronizing information; When two REC are arranged in same machine frame/machine box, during shared same backboard, can also utilize the backboard cabling to come transfer clock and synchronizing information as physical channel independently;
S3, REC2 can also further handle described clock and synchronizing signal after receive clock and synchronizing signal.For example, described clock is sent to the clock module of REC2, will clock after treatment send to other baseband module of REC2 by this clock module; Perhaps described clock and synchronizing signal are handled the back and produce the CPRI module that is dealt into REC2 with make a start (REC1) synchronous clock and synchronizing signal by this clock module, as the input clock and the synchronizing signal of this CPRI module, can be operated in same set of clock between the REC of CPRI module, clock module and cascade of two cascade REC and sync-body is fastened thereby can make.Need to prove, frame between two REC regularly is very important synchronously, usually CPRI is that a frame comes framing with 10ms, if the frame between two REC is regularly asynchronous, then the data that CPRI comes by BUFFER buffer memory opposite end when converging need carried out, cause REC to producing between the RE, thereby systematic function is produced considerable influence than long time delay.Can carry the CPRI frame timing information in the synchronizing signal in the present embodiment, consider that synchronizing signal might produce time delay when transmitting between two REC, stability for further raising system, can in the clock module of REC or CPRI module, compensate during concrete the processing issuable time delay, it is to be noted, this time delay is very little usually, is easy to compensation in the clock module of REC or CPRI module.
In addition, at the radio equipment controller of cascade, promptly REC1 and REC2 are operated in identical clock and synchronously after the system, can also converge the wireless device RE that described clock and synchronizing signal is sent to far-end by CPRI.Specifically, can all cascade radio equipment controllers be converged by CPRI, the content that converges can also comprise base band data, HDLC (High-level Data Link Control, High-Level Data Link Control), IQ (Inphase-Quadrature) data and some other control word information, send to the wireless device RE of far-end after the content that converges by the CPRI link, the wireless device RE of far-end can recover clock and synchronizing information etc. by CPRI.
Embodiment three
As shown in Figure 2, present embodiment provides a kind of information transmitting system, comprises at least two radio equipment controllers by (common public radio interface link) CPRI cascade.For convenience, only show two radio equipment controllers among Fig. 2, in fact native system can comprise two or more radio equipment controllers, and described at least two radio equipment controllers by the cascade of CPRI link can be supported different communication standards respectively, such as, REC1 (201) can support the WCDMA standard, and REC2 (202) supports the GSM standard.Described radio equipment controller comprises clock module (212,222) and CPRI module (211,221).Described system also comprises independently physical channel (204), is used for transmitting between the REC of cascade clock and synchronizing information.In the present embodiment, also comprise independently physical channel between the radio equipment controller of cascade, transmit clock and synchronizing information by physical channel independently between the radio equipment controller of cascade, thereby make and to be operated in identical clock between the radio equipment controller of cascade and sync-body is fastened.Further, consider that synchronizing signal might produce time delay when transmitting between two REC, the stability for further raising system can also compensate issuable time delay in clock module or CPRI module during specific implementation.In addition, the system described in this example can also comprise a wireless device RE (203).Radio equipment controller by the CPRI cascade is after realizing that clock and synchronizing signal are synchronously, carrying out CPRI at REC2 converges, clock and synchronizing signal are sent to the wireless device RE of far-end by the content after converging by the CPRI link, and wireless device RE can recover clock and synchronizing signal etc. by clock recovery module (231) from the CPRI link.Present embodiment passes through independently physical channel extraction reference clock and synchronizing information, extracts reference clock and synchronizing information by CPRI in prior art, has simplified system's realization.Transmit for clock signal of system, because the CPRI interface is the synchronous driving mode, if the clock on both sides is inconsistent when utilizing the CPRI interface to transmit in the prior art, for example frequency has deviation slightly, the data sampling mistake will occur after a period of time.And the method for present embodiment has been owing to adopted independently the physical channel to come the transmission clock synchronizing information, thereby can be in the clock synchronization that guarantees both sides, and guaranteeing both sides CPRI interface, long-time biography can be because of the asynchronous data sampling mistake that produces mutually.In addition, in the present embodiment, recipient's radio equipment controller no longer needs clock recovery module, thereby can reduce the overall system cost.Simultaneously, the CPRI link breaks down between the equipment in cascade, for example take place to dodge when breaking, because present embodiment has adopted special physical channel transmission clock and synchronizing information, thereby the clock of each equipment and synchro system still can steady operations, strengthened the stability of entire system, also reduced of the influence of CPRI link failure other module of system.
Embodiment four
Radio equipment controller is example with REC, present embodiment provides a kind of information transmitting system, as shown in Figure 3, comprise two REC (302 by the CPRI cascade, 303), can be arranged in same machine frame or machine box (301), shared same backboard, wherein, REC comprises clock module and CPRI module (not shown).In the present embodiment, the REC of two cascades utilizes passage (304) between the backplane interface as independently physical channel transmission clock and synchronizing information, during specific implementation, can select one of them REC as benchmark REC, benchmark REC utilizes the passage between the backplane interface that clock and synchronizing signal are sent to another REC.Equally, the system in the present embodiment also may further include a wireless device RE, after the REC of cascade converges through CPRI clock and synchronizing signal is sent to the RE of far-end by the CPRI link.
Embodiment five
Present embodiment provides a kind of information transmitting system, as shown in Figure 4, comprises two REC (401,402) by the CPRI cascade, and wherein, REC comprises clock module and CPRI module (not shown).In the present embodiment, be connected with clock distribution (403) between the REC of two cascades, can utilize the conduct of clock distribution independently physical channel transmission clock and synchronizing information.During specific implementation, can select one of them REC as benchmark REC, benchmark REC utilizes the clock distribution that clock and synchronizing information are sent to another REC.Equally, the system in the present embodiment also may further include a wireless device RE, after the REC of cascade converges through CPRI clock and synchronizing signal is sent to the RE of far-end by the CPRI link.
Above embodiment is only in order to illustrating technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is had been described in detail with reference to above-mentioned preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and this modification or be equal to the spirit and scope that replacement does not break away from technical solution of the present invention.
Claims (10)
1, a kind of method for sending information, it is characterized in that, when at least two radio equipment controllers pass through the cascade of common public radio interface link, select one of them radio equipment controller as the benchmark radio equipment controller, its clock and synchronizing information are sent to other radio equipment controllers with its cascade by physical channel independently by described benchmark radio equipment controller.
2, the method for claim 1 is characterized in that, also comprises: described other radio equipment controllers receive after the clock and synchronizing information of described benchmark radio equipment controller transmission, and further the time delay that synchronizing signal is produced compensates.
3, the method for claim 1 is characterized in that, also comprises: converge the wireless device that described clock and synchronizing signal is sent to far-end by CPRI.
4, the method for claim 1, it is characterized in that one of them radio equipment controller of described selection comprises as the benchmark radio equipment controller: select one of them radio equipment controller as the benchmark radio equipment controller by configuration parameter or by auto-negotiation between at least two radio equipment controllers.
5, the method for claim 1, it is characterized in that, also comprise: select in described two wireless devices at least one radio equipment controller except that the benchmark radio equipment controller at least as standby benchmark radio equipment controller, when described benchmark radio equipment controller can't provide accurately clock and/or synchronizing information, described standby benchmark radio equipment controller is upgraded to the benchmark radio equipment controller by switching.
6, a kind of information transmitting system, the radio equipment controller that comprises at least two cascades, it is characterized in that, pass through the cascade of common public radio interface link between the described radio equipment controller, also comprise independently physical channel between the described radio equipment controller, described radio equipment controller transmits clock and synchronizing information by described independently physical channel.
7, information transmitting system as claimed in claim 6 is characterized in that, the shared backboard of the radio equipment controller of described cascade, and described independently physical channel is the passage between the backplane interface.
8, information transmitting system as claimed in claim 6 is characterized in that, is connected with the clock distribution between the radio equipment controller of described cascade, and described independently physical channel is the clock distribution.
9, information transmitting system as claimed in claim 6, it is characterized in that, have a benchmark radio equipment controller in the radio equipment controller of described cascade, described benchmark radio equipment controller passes to other cascade radio equipment controllers by described physical channel with clock and synchronizing information.
10, information transmitting system as claimed in claim 6 is characterized in that, the radio equipment controller of described cascade comprises clock module or CPRI module, in described clock module or CPRI module issuable time delay is compensated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102162024A CN101365180A (en) | 2008-09-11 | 2008-09-11 | Information sending method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102162024A CN101365180A (en) | 2008-09-11 | 2008-09-11 | Information sending method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101365180A true CN101365180A (en) | 2009-02-11 |
Family
ID=40391260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102162024A Pending CN101365180A (en) | 2008-09-11 | 2008-09-11 | Information sending method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101365180A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802170A (en) * | 2011-05-26 | 2012-11-28 | 中兴通讯股份有限公司 | Method for acquiring Ethernet data frame, device and base station |
| CN103067148A (en) * | 2012-07-27 | 2013-04-24 | 杭州亿恒科技有限公司 | Hardware synchronization method of cascading instrument |
| CN103533620A (en) * | 2012-07-05 | 2014-01-22 | 联想(北京)有限公司 | Method and device for providing reference clock signal for wireless communication module |
| CN104298160B (en) * | 2014-10-27 | 2017-03-15 | 北京必创科技股份有限公司 | A kind of wireless double-core data acquisition device and acquisition method |
| CN107078856A (en) * | 2014-09-19 | 2017-08-18 | 日本电气株式会社 | Wireless control system and the method for monitoring wireless link error |
-
2008
- 2008-09-11 CN CNA2008102162024A patent/CN101365180A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802170A (en) * | 2011-05-26 | 2012-11-28 | 中兴通讯股份有限公司 | Method for acquiring Ethernet data frame, device and base station |
| WO2012159482A1 (en) * | 2011-05-26 | 2012-11-29 | 中兴通讯股份有限公司 | Method and device for acquiring ethernet data frame, and base station |
| CN102802170B (en) * | 2011-05-26 | 2017-03-15 | 中兴通讯股份有限公司 | Obtain method, device and the base station of ethernet data frame |
| CN103533620A (en) * | 2012-07-05 | 2014-01-22 | 联想(北京)有限公司 | Method and device for providing reference clock signal for wireless communication module |
| CN103533620B (en) * | 2012-07-05 | 2017-07-25 | 联想(北京)有限公司 | The method and device of reference clock is provided for wireless communication module |
| CN103067148A (en) * | 2012-07-27 | 2013-04-24 | 杭州亿恒科技有限公司 | Hardware synchronization method of cascading instrument |
| CN103067148B (en) * | 2012-07-27 | 2016-03-02 | 杭州亿恒科技有限公司 | A kind of can the method for hardware synchronization between cascade instrument |
| CN107078856A (en) * | 2014-09-19 | 2017-08-18 | 日本电气株式会社 | Wireless control system and the method for monitoring wireless link error |
| CN107078856B (en) * | 2014-09-19 | 2020-06-19 | 日本电气株式会社 | Radio control system and method for monitoring radio link errors |
| CN104298160B (en) * | 2014-10-27 | 2017-03-15 | 北京必创科技股份有限公司 | A kind of wireless double-core data acquisition device and acquisition method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103825696B (en) | A kind of device that high speed fibre real-time Communication for Power is realized based on FPGA | |
| CN102045124A (en) | Rack-mount synchronous Ethernet architecture and clock synchronization control method | |
| EP3322255B1 (en) | Methods and network apparatus for receivingf cpri data stream via ethernet frames. | |
| CN101365180A (en) | Information sending method and apparatus | |
| CN102323877B (en) | SERDES-based video processing system | |
| CN103532618B (en) | optical module error code testing device | |
| WO2018120934A1 (en) | Active-standby signal processing method of lte base station baseband processing board | |
| CN2922300Y (en) | Clock synchronizing system and service plate | |
| CN103404226A (en) | Method and device for data transmission | |
| CN103582186A (en) | Method and device for BBU interframe data interaction in wireless soft base station | |
| CN101989906B (en) | Message synchronizing method, device and system | |
| CN1613186B (en) | Method and apparatus for clock generation using reference signal selection | |
| CN108322483A (en) | A kind of implementation method of the receiving terminal circuit based on JESD204B agreements | |
| CN104025701A (en) | Method and device for switching clocks, and distributed indoor system using repeater as relay | |
| EP2837117B1 (en) | Clock switching algorithm based on preferred clock source | |
| CN101847135B (en) | Series-connected communication system and communication method thereof | |
| JPH09307562A (en) | Optical network equipment | |
| JP2007306362A (en) | Communication apparatus | |
| CN102209037B (en) | Media access control address switching method, network equipment and user equipment | |
| CN215773583U (en) | Base station redundancy device | |
| CN101702839A (en) | Device and method for implementing inverting function of main link and standby link of Ir interface | |
| US20130121240A1 (en) | Delay Management in Shared Baseband Deployments | |
| CN100563171C (en) | A kind of method and system that improve BITS equipment output reliability | |
| CN101964183B (en) | Display processing equipment and multi-screen display system | |
| CN113259044A (en) | 5G extended pico-base station redundant time service synchronization device and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20090211 |