CN101932092A - Method and system for implementing macro base station clock synchronization and macro base station equipment - Google Patents
Method and system for implementing macro base station clock synchronization and macro base station equipment Download PDFInfo
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- CN101932092A CN101932092A CN2009100875248A CN200910087524A CN101932092A CN 101932092 A CN101932092 A CN 101932092A CN 2009100875248 A CN2009100875248 A CN 2009100875248A CN 200910087524 A CN200910087524 A CN 200910087524A CN 101932092 A CN101932092 A CN 101932092A
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Abstract
The invention discloses a method and a system for implementing macro base station clock synchronization and macro base station equipment for solving the problems of low reliability and safety, high construction difficulty and high equipment and engineering construction cost in the conventional scheme for implementing the macro base station clock synchronization based on a GPS. The method for implementing the macro base station clock synchronization comprises the following steps of: receiving first standard time information transmitted by a standard time ground transmission system and second standard time information provided by a star-based positioning system through a macro base station; when the preset preferable standard time information is received normally, performing clock synchronization according to the preferable standard time information; and when the receiving of the preferable standard time information fails, switching a clock source, and performing clock synchronization according to the first standard time information, wherein the preferable standard time information is the first standard time information or the second standard time information.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of method, system and macro base station equipment of realizing the macro base station clock synchronization.
Background technology
Existing mobile communication system, PHS (Personal Handy-phone System for example, personal handhold telephone system), WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA) inserts) system, TD-SCDMA (Time Division-Synchronous CDMA, TD SDMA inserts) system, the CDMA2000 system, WiMAX (World Interoperability for Microwave Access, whole world inserting of microwave interoperability) system, all there is macro base station (Base Station for example in LTE (Long Term Evolution, Long Term Evolution) system etc., NodeB, eNodeB) requirement of clock synchronization.Wherein, PHS system, CDMA2000 system, WiMAX system and TD-SCDMA system are because technology realizes that the macro base station clock synchronization is had more harsh requirement.With the TD-SCDMA system is that example describes, and in the present specification macro base station in the TD-SCDMA system (NodeB) is called the TD base station.The TD-SCDMA system is very strict to the synchronous requirement of TD base station clock, and the maximum deviation of radio frames frame head does not allow to surpass 3 μ s between any two TD base stations, to guarantee the frame synchronization on the radio open.If do not realize the clock synchronization of TD base station in the TD-SCDMA system, can cause following serious problems:
Time slot interference: the signaling bearer of previous time slot has destroyed the orthogonality of two interior orthogonal codes of time slot in next time slot, makes interior TD base station of these two time slots and portable terminal all can't carry out normal demodulation;
Uplink and downlink timeslot disturbs: the downstream signal of a TD base station can produce powerful interference to the reception of adjacent TD base station upward signal, has a strong impact on the normal reception of adjacent TD base station to upward signal.
In the existing mobile communication system, generally realize the clock synchronization of macro base station based on GPS (Global Positioning System, global positioning system), for example, existing TD-SCDMA system adopts this mode exactly.Specific implementation is to adopt the mode that adds GPS reception antenna and GPS receiving equipment, the GPS receiving equipment is arranged on the macro base station equipment, the GPS receiving equipment will be converted to from the gps signal (coming down to a kind of radio frequency analog signal) that the GPS reception antenna obtains and satisfy macro base station required standard temporal information, make macro base station realize clock synchronization according to this standard time information.There is following technical problem in scheme based on GPS realization macro base station clock synchronization:
(1) reliability and fail safe are lower;
The clock synchronization that realizes macro base station need rely on GPS, and each macro base station all needs to install GPS receiving equipment and GPS reception antenna, if GPS reception antenna or GPS receiving equipment lost efficacy, then macro base station will be paralysed; And GPS can carry out local performance degradation setting and restriction is used, and will bring potential safety hazard to the operation of mobile communication system.
(2) the GPS reception antenna has specific (special) requirements to the addressing of macro base station equipment, and difficulty of construction is big;
The installation of GPS reception antenna need be satisfied 120 ° headroom requirement, otherwise will influence the number of satellite that can receive; The feeder line distance surpasses 110 meters needs to increase relay amplifier; GPS reception antenna feeder line is thicker down for long distance.
(3) equipment and engineering construction cost are higher;
Each macro base station equipment all needs to install GPS receiving equipment and GPS reception antenna, has increased equipment and engineering construction cost.
As seen, existing realize the scheme of macro base station clock synchronization, exist that reliability and fail safe are lower, difficulty of construction big, equipment and engineering construction cost problem of higher based on GPS.
Summary of the invention
The invention provides a kind of method, system and macro base station equipment of realizing the macro base station clock synchronization, in order to solve in the existing scheme that realizes the macro base station clock synchronization based on GPS, reliability and fail safe are lower, difficulty of construction big, equipment and engineering construction cost problem of higher.
The invention provides a kind of method that realizes the macro base station clock synchronization, comprising:
The standard time ground transmission system sends the standard time information that standard clock source provides to a plurality of macro base stations based on Precision Time Protocol PTP;
Each macro base station carries out clock synchronization according to the standard time information that receives.
The invention provides a kind of system that realizes the macro base station clock synchronization, comprising:
Standard clock source is used to provide standard time information;
The standard time ground transmission system is used for standard time information that described standard clock source is provided, sends a plurality of macro base stations to based on Precision Time Protocol PTP;
Macro base station is used for carrying out clock synchronization according to the standard time information that receives.
Based on same technical conceive, the invention provides the another kind of method that realizes the macro base station clock synchronization, comprising:
The second standard time information that first standard time information that macro base station acceptance criteria time ground transmission system transmits and satellite-based navigation system provide;
Receive just often in predefined preferred standard temporal information, carry out clock synchronization according to the preferred standard temporal information, when the reception of preferred standard temporal information is broken down, carry out the switching in clock source, carry out clock synchronization according to another standard time information, described preferred standard temporal information is the first standard time information or the second standard time information.
The invention provides a kind of macro base station equipment, comprise very first time input interface, the second time input interface, control module and clock synchronization module, wherein:
Described very first time input interface is used for the first standard time information that acceptance criteria time ground transmission system transmits;
The described second time input interface is used to receive the second standard time information that the satellite-based navigation system provides;
Described control module, be used for receiving just often in predefined preferred standard temporal information, the preferred standard temporal information is sent to clock synchronization module, when the reception of preferred standard temporal information is broken down, carry out the switching in clock source, another standard time information is sent to clock synchronization module, and described preferred standard temporal information is the first standard time information or the second standard time information;
Described clock synchronization module is used for carrying out clock synchronization according to the standard time information that receives.
First kind of method and system that realize the macro base station clock synchronization provided by the invention, send the standard time information that standard clock source provides to a plurality of macro base stations by the standard time ground transmission system, reduce even evaded the dependence of macro base station fully, improved the reliability and the fail safe that realize the macro base station clock synchronization GPS; Avoided GPS receiving equipment and GPS reception antenna are installed on each macro base station equipment, reduced difficulty of construction, saved equipment and engineering construction cost.
Second kind of method and macro base station equipment of realizing the macro base station clock synchronization provided by the invention, first standard time information of macro base station acceptance criteria time ground transmission system transmission simultaneously and the second standard time information that the satellite-based navigation system provides, and preestablish the first standard time information or the second standard time information is the preferred standard temporal information, under the situation that the preferred standard temporal information can normally receive, carry out clock synchronization according to the preferred standard temporal information, under the situation that the reception of preferred standard temporal information is broken down, alternative another standard time information is carried out clock synchronization, realize the switching in clock source under the situation that the reception in one road clock source breaks down by doubleclocking source input, reduced the dependence of macro base station, improved the reliability and the fail safe that realize the macro base station clock synchronization simultaneously greatly GPS.
Description of drawings
Fig. 1 is a system architecture schematic diagram of realizing the macro base station clock synchronization in the embodiment of the invention one;
Fig. 2 is for carrying out the message transmission and the process chart of compensation of delay and time unifying between the master and slave equipment in the embodiment of the invention one;
Fig. 3 is a method flow diagram of realizing the macro base station clock synchronization in the embodiment of the invention one;
Fig. 4 is a system architecture schematic diagram of realizing the macro base station clock synchronization in the embodiment of the invention two;
Fig. 5 is a method flow diagram of realizing the macro base station clock synchronization in the embodiment of the invention two;
Fig. 6 is the structured flowchart of macro base station equipment in the embodiment of the invention two.
Embodiment
Realize the problem that the scheme of macro base station clock synchronization exists at existing based on GPS, the embodiment of the invention provides the solution that realizes the macro base station clock synchronization, in order to reduce the dependence of macro base station to GPS, promote the reliability and the fail safe that realize the macro base station clock synchronization, reduce difficulty of construction, and saving equipment and engineering construction cost.Below in conjunction with Figure of description the solution that the embodiment of the invention provides is elaborated.
Embodiment one
Present embodiment provides a kind of solution that realizes the macro base station clock synchronization, need not on each macro base station equipment, to install GPS receiving equipment and GPS reception antenna, but send the standard time information that standard clock source provides to a plurality of macro base stations, thereby realize the clock synchronization of each macro base station by the standard time ground transmission system.The realization of standard time ground transmission system need be based on PTP agreement (Precision Time Protocol, Precision Time Protocol), the PTP agreement is a kind of time host-host protocol of accurate clock synchronization protocol IEEE 1588 definition, and being used for clock to standard ethernet or other distributed network system (DNS) equipment, to carry out the submicrosecond level synchronous.
At first the system architecture that realizes the macro base station clock synchronization is described.As shown in Figure 1, this system comprises: standard clock source 101, standard time ground transmission system 102 and a plurality of macro base station 103, wherein:
Standard clock source 101 is used to provide standard time information;
Standard time ground transmission system 102 is used for standard time information that standard clock source 101 is provided, sends a plurality of macro base stations to based on the PTP agreement;
Macro base station 103 is used for carrying out clock synchronization according to the standard time information that receives.
In the embodiment of the invention, standard clock source specifically is meant the system or equipment that standard time information can be provided.Standard clock source can be the satellite-based navigation system, the satellite-based navigation system includes but not limited to the DGPS system in GPS of USA, WAAS system, LAAS system, coastline covering the whole world, Muscovite CLONASS system, the Galileo system of European Union and Chinese dipper system.Standard clock source also can be PRC (Primary Reference Clock, reference clock) or LPR (Local Primary Reference, regional reference clock).PRC meets the G.811 national reference clock that contains cesium-beam atomic clock of standard, and cesium-beam atomic clock is medium-term and long-term frequency stability and the best a kind of clock source of precision of using at present.LPR disposes GPS receiving equipment and GPS reception antenna, LPR is based on gps signal, also can accept the clock synchronization of PRC, BITS (Building Integrated Timing Supply System, the comprehensive regularly feed system of building) clock is a kind of usual way of LPR.
If standard clock source 101 is the satellite-based navigation system, then standard time ground transmission system 102 is further used for from satellite-based navigation system received RF analog signal, and the radio frequency analog signal that receives is converted to standard time information.
The simple radio frequency analog signal of introducing the emission of satellite-based navigation system is converted to standard time information processing step.The satellite-based navigation system is that example describes with the gps system, and corresponding radio frequency analog signal is a gps signal.The gps signal that receives from the GPS reception antenna need obtain intermediate-freuqncy signal through radio frequency amplification and down-converted usually, receive by sampling then and obtain digital medium-frequency signal, by obtaining digital baseband signal behind the digital phase-locked loop removal carrier wave, obtain satellite navigation message and 1PPS (1Pulseper Second by demodulation at last, pulse per second (PPS)) information, and can obtain TOD (Time ofDay, time every day) information according to satellite navigation message.Wherein, 1PPS information is not represented the concrete moment, but begins with rising edge of a pulse mark per second, and its precision order of magnitude is up to 100ns; In the concrete moment of TOD information representation, its precision order of magnitude is 1s.Standard time information generally adopts 1PPS information+TOD information format.
The PTP protocol network system that standard time ground transmission system 102 is made up of the terrestrial transmission equipment of a plurality of support PTP agreements, real network is provided with two layer network architecture in disposing, and comprises the Access Layer that directly links to each other with macro base station 103 and the convergence-level on the Access Layer.Each terrestrial transmission equipment can provide based on business interface in the band of PTP agreement, and the external time interface of 1PPS information+TOD information can be provided simultaneously.
If macro base station 103 is supported the PTP agreements, can by with the band of its terrestrial transmission equipment that directly links to each other in business interface obtain standard time information; Macro base station 103 also can not supported the PTP agreement, in this case, can obtain standard time information by the external time interface with its terrestrial transmission equipment that directly links to each other.
The communication port of terrestrial transmission equipment possesses port status in the standard time ground transmission system 102, mainly contains three kinds, comprising: major state (Master, M), from state (Slave, S) and passive state (Passive, P).Port status is that the communication port of Master abbreviates the Master port as, and the Master port is used for to the top-quality clock of whole Web broadcast source; The Slave port is used for following the tracks of the clock of upstream equipment; The Passive port is in status in the middle of, and the clock of upstream equipment is not followed the tracks of in radio clock source neither yet.Passive appears in port status, means that generally that two or more clock source quality is arranged in whole PTP protocol network system is equally matched.
In the standard time ground transmission system 102, communication port transmission standard temporal information by separately between two terrestrial transmission equipment, the terrestrial transmission equipment of Master port correspondence is main equipment (being upstream equipment), and the terrestrial transmission equipment of Slave port correspondence is slave unit (being upstream device).By writing down the timestamp that produces when message transmits between the master and slave equipment, determine link time-delay and time migration between the master and slave equipment, can realize clock synchronization between the master and slave equipment by compensation of delay and time unifying, and then guarantee the clock synchronization of whole standard time ground transmission system.
According to IEEE 1588 regulations, carry out compensation of delay and time unifying by four kinds of messages, be respectively:
Sync (synchronously) message, main equipment-＞slave unit;
Follow_Up (following) message, main equipment-＞slave unit;
Delay_Req (time-delay request) message, slave unit-＞main equipment;
Delay_Resp (time-delay response) message, main equipment-＞slave unit.
Simply introduce the message transmission and the handling process of carrying out compensation of delay and time unifying between the master and slave equipment below, as shown in Figure 2, comprise the steps:
The PTP protocol application course slave unit of S201, main equipment sends the Sync message, main equipment record Sync message leaves the moment value t1 of Master port, and t1 deposited in register, and t1 is by 64 digit counter value representations, and the counter triggers clock is provided by the system clock of main equipment;
S202, slave unit record Sync message arrive the moment value t2 of Slave port, and t2 is deposited in register, report to the PTP protocol application layer of slave unit simultaneously, and t2 is by 64 digit counter value representations, and the counter triggers clock is provided by the system clock of slave unit;
The PTP protocol application course slave unit of S203, main equipment sends the Follow_Up message, and the Follow_Up message comprises that previous Sync message leaves the moment value t1 of Master port;
S204, slave unit receive the t1 that comprises in the recorded message behind the Follow_Up message, slave unit can learn that just the Sync message leaves moment value (the being the time of reception) t2 of the moment value of Master port (being delivery time) t1 and arrival Slave port, suppose t2-t1=A, then A comes down to time migration Offset and the time-delay of the link between main equipment and slave unit MS_Delay sum, that is: the A=Offset+MS_Delay between main equipment and the slave unit;
The PTP protocol application course main equipment of S205, slave unit sends the Delay_Req message, and slave unit record Delay_Req message leaves the moment value t3 of Slave port, and t3 is deposited in register;
S206, main equipment record Delay_Req message arrive the moment value t4 of Master port, and t4 is deposited in register;
The PTP protocol application course slave unit of S207, main equipment sends the Delay_Resp message, and the Delay_Req message comprises that the Delay_Req message arrives the moment value t4 of Master port;
S208, slave unit receive the t4 that comprises in the recorded message behind the Delay_Resp message, slave unit can learn that just the Delay_Req message leaves moment value (the being the time of reception) t4 of the moment value of Slave port (being delivery time) t3 and arrival Master port, suppose t4-t3=B, then B comes down to the poor of link time-delay SM_Delay between slave unit and the main equipment and the time migration Offset between main equipment and the slave unit, that is: B=SM_Delay-Offset.
Through above-mentioned message transmission and handling process, suppose that link time-delay MS_Delay between main equipment and the slave unit equals the link time-delay SM_Delay between slave unit and the main equipment, then slave unit can be determined the concrete numerical value of Offset, SM_Delay and MS_Delay by following formula:
Offset＝(A-B)/2
MS_Delay＝SM_Delay＝(A+B)/2
Slave unit can carry out compensation of delay and time unifying according to Offset and MS_Delay, thus the clock synchronization of realization and main equipment.
The message of realizing the clock synchronization between the master and slave equipment also comprises Announce (declaration) message, be used to declare the clock source quality of each communication port, be convenient to use BMC (Best Master Clock, best master clock algorithm) to determine best master clock according to the clock source quality of each communication port.For arbitrary terrestrial transmission equipment, when receiving the Announce message of upstream equipment transmission, by this Announce message, extract the attribute information in clock source, determine the attribute information of best master clock with the BMC algorithm, thereby determine best master clock, equipment sends the Announce message that conforms to this equipment downstream simultaneously; Processing by equipment step by step realizes that BMC generates tree, controls the choosing of best master clock of whole network.
Based on the system architecture that realizes the macro base station clock synchronization, present embodiment provides a kind of method that realizes the macro base station clock synchronization, as shown in Figure 3, comprises step:
S301, standard time ground transmission system send the standard time information that standard clock source provides to a plurality of macro base stations based on the PTP agreement;
In concrete the enforcement, standard clock source can be satellite-based navigation system, PRC or LPR, if standard clock source is the satellite-based navigation system, the standard time ground transmission system also needs from satellite-based navigation system received RF analog signal, and the radio frequency analog signal that receives is converted to this standard time information.
S302, each macro base station carry out clock synchronization according to the standard time information that receives.
If macro base station is not supported the PTP agreement, send standard time information to macro base station by external time interface with the terrestrial transmission equipment that macro base station directly links to each other, if macro base station is supported the PTP agreement, then can also send macro base station to by business interface in being with the terrestrial transmission equipment that macro base station directly links to each other.
The method and system of the realization macro base station clock synchronization that embodiment one provides, send the standard time information that standard clock source provides to a plurality of macro base stations by the standard time ground transmission system, reduce even evaded the dependence of macro base station fully, improved the reliability and the fail safe that realize the macro base station clock synchronization GPS; Avoided GPS receiving equipment and GPS reception antenna are installed on each macro base station equipment, reduced difficulty of construction, saved equipment and engineering construction cost.
Embodiment two
On the solution basis of the realization macro base station clock synchronization that embodiment one provides, present embodiment has proposed a kind of solution that realizes the macro base station clock synchronization based on the input of doubleclocking source, the system architecture of doubleclocking source input as shown in Figure 4, the doubleclocking source comprises specifically among the embodiment one that the standard time information that is provided by standard clock source and transmit via the standard time ground transmission system is (for the ease of distinguishing, be called the first standard time information), and the standard time information that provides of satellite-based navigation system (, being called the second standard time information) for the ease of distinguishing.Macro base station can be supported the input of the standard time information of 1PPS information+TOD information format, the time precision that time precision that the satellite-based navigation system provides and standard time ground transmission system transmit can satisfy the clock synchronization demand of macro base station in same rank.
Macro base station carries out clock synchronization based on the standard time information that the satellite-based navigation system provides, and may be subjected to the interference of extraneous factors such as whether normal weather, satellite transit; Carry out clock synchronization based on the standard time information that the standard time ground transmission system transmits, may be subjected to the network transmission performance deterioration, interference such as upstream equipment inefficacy.And the doubleclocking source is imported simultaneously, in the automatic selection of macro base station side realization to the clock source, the macro base station that then can avoid causing because of one road clock source actual effect is paralysed, and reduces the dependence of macro base station to GPS, promotes the reliability and the fail safe that realize the macro base station clock synchronization.
As shown in Figure 5, the method for the realization macro base station clock synchronization that present embodiment provides comprises step:
The second standard time information that first standard time information that S501, macro base station acceptance criteria time ground transmission system transmit and satellite-based navigation system provide;
Consistent with the solution that provides among the embodiment one, the standard time ground transmission system sends the first standard time information that standard clock source provides to a plurality of macro base stations based on the PTP agreement, and standard clock source can be satellite-based navigation system, PRC or LPR.In order to realize the reception of macro base station to the first standard time information of standard time ground transmission system transmission, this just requires macro base station that corresponding time input interface is provided, by docking, obtain the first standard time information of 1PPS information+TOD information format with the external time interface of its terrestrial transmission equipment that directly links to each other;
In order to realize the reception of the second standard time information that macro base station provides the satellite-based navigation system, this just requires to add the reception antenna and the receiving equipment of satellite-based navigation system on macro base station equipment, and provide corresponding time input interface, by docking, obtain the second standard time information of 1PPS information+TOD information format with the time output interface of the receiving equipment of satellite-based navigation system.
S502, receive just often in predefined preferred standard temporal information, carry out clock synchronization according to the preferred standard temporal information, when the reception of preferred standard temporal information is broken down, carry out the switching in clock source, carry out clock synchronization according to another standard time information, described preferred standard temporal information is the first standard time information or the second standard time information;
In concrete the enforcement, the first standard time information can be set flexibly as required or the second standard time information is the preferred standard temporal information, in order to reduce the dependence of macro base station to greatest extent, can be the preferred standard temporal information with the first standard time information setting to GPS.If the first standard time information that preestablishes is the preferred standard temporal information, then just often at the first standard time message pick-up, carry out clock synchronization according to the first standard time information, when the reception of the first standard time information is broken down, carry out the switching in clock source, carry out clock synchronization according to the second standard time information; If the second standard time information that preestablishes is the preferred standard temporal information, then just often at the second standard time message pick-up, carry out clock synchronization according to the second standard time information, when the reception of the second standard time information is broken down, carry out the switching in clock source, carry out clock synchronization according to the first standard time information;
What wherein, the reception of standard time information was broken down specifically is characterized by: level signal disappearance or level signal are very faint on the time input interface of acceptance criteria temporal information.
In concrete the enforcement, can also comprise following treatment step:
A, macro base station are after the reception of preferred standard temporal information recovers normally, detect whether described preferred standard temporal information continues to receive normal in the time cycle of setting, wherein, the time cycle of setting can rule of thumb be determined flexibly, generally can be set to 30 minutes;
The preferred standard temporal information continues to receive just often in B, time cycle of confirm setting, carries out returning of clock source and cuts, and carries out clock synchronization according to described preferred standard temporal information.
Based on same technical conceive, present embodiment provides a kind of macro base station equipment, as shown in Figure 6, comprises very first time input interface 601, the second time input interface 602, control module 603 and clock synchronization module 604, wherein:
Very first time input interface 601 is used for the first standard time information that acceptance criteria time ground transmission system transmits;
The second time input interface 602 is used to receive the second standard time information that the satellite-based navigation system provides;
Preferable, control module 603, also be used for after the reception of preferred standard temporal information recovers normally, detect whether described preferred standard temporal information continues to receive normal in the time cycle of setting, described preferred standard temporal information continues to receive just often in the time cycle of confirming to set, carry out returning of clock source and cut, the preferred standard temporal information is sent to clock synchronization module 604.
The method and the macro base station equipment of the realization macro base station clock synchronization that embodiment two provides, first standard time information of macro base station acceptance criteria time ground transmission system transmission simultaneously and the second standard time information that the satellite-based navigation system provides, and preestablish the first standard time information or the second standard time information is the preferred standard temporal information, under the situation that the preferred standard temporal information can normally receive, carry out clock synchronization according to the preferred standard temporal information, under the situation that the reception of preferred standard temporal information is broken down, alternative another standard time information is carried out clock synchronization, realize the switching in clock source under the situation that the reception in one road clock source breaks down by doubleclocking source input, reduced the dependence of macro base station, improved the reliability and the fail safe that realize the macro base station clock synchronization simultaneously greatly GPS.
The solution of the realization macro base station clock synchronization that the embodiment of the invention provides, the scope of application is very extensive, can under existing and following various wireless standards, realize the clock synchronization of macro base station, for example PHS system, WCDMA system, CDMA2000 system, WiMAX system, TD-SCDMA system, LTE system, or the like.
It is apparent to those skilled in the art that the embodiment of the invention can be provided as method, system, equipment or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium comprising computer usable program code (including but not limited to magnetic disc store, CD-ROM, optical memory etc.).
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a method that realizes the macro base station clock synchronization is characterized in that, comprising:
The standard time ground transmission system sends the standard time information that standard clock source provides to a plurality of macro base stations based on Precision Time Protocol PTP;
Each macro base station carries out clock synchronization according to the standard time information that receives.
2. the method for claim 1 is characterized in that, described standard clock source is satellite-based navigation system, reference clock PRC or regional reference clock LPR; And,
If described standard clock source is the satellite-based navigation system, described method also comprises:
The standard time ground transmission system is from satellite-based navigation system received RF analog signal, and the radio frequency analog signal that receives is converted to described standard time information.
3. method as claimed in claim 1 or 2, it is characterized in that, described standard time ground transmission system is made up of the terrestrial transmission equipment of a plurality of support PTP agreements, and send described standard time information to macro base station by external time interface with terrestrial transmission equipment that macro base station directly links to each other, perhaps send macro base station to by business interface in being with.
4. a system that realizes the macro base station clock synchronization is characterized in that, comprising:
Standard clock source is used to provide standard time information;
The standard time ground transmission system is used for standard time information that described standard clock source is provided, sends a plurality of macro base stations to based on Precision Time Protocol PTP;
Macro base station is used for carrying out clock synchronization according to the standard time information that receives.
5. a method that realizes the macro base station clock synchronization is characterized in that, comprising:
The second standard time information that first standard time information that macro base station acceptance criteria time ground transmission system transmits and satellite-based navigation system provide;
Receive just often in predefined preferred standard temporal information, carry out clock synchronization according to the preferred standard temporal information, when the reception of preferred standard temporal information is broken down, carry out the switching in clock source, carry out clock synchronization according to another standard time information, described preferred standard temporal information is the first standard time information or the second standard time information.
6. method as claimed in claim 5 is characterized in that, also comprises:
Described macro base station is after the reception of preferred standard temporal information recovers normally, and whether the described first standard time information continues reception normally in the time cycle that detection is set;
The described first standard time information continues to receive just often in the time cycle of confirming to set, and carries out returning of clock source and cuts, and carries out clock synchronization according to described preferred standard temporal information.
7. as claim 5 or 6 described methods, it is characterized in that the described first standard time information is provided by standard clock source, and
Described standard time ground transmission system sends the described first standard time information that standard clock source provides to described macro base station based on Precision Time Protocol PTP.
8. method as claimed in claim 7 is characterized in that, described standard clock source is satellite-based navigation system, reference clock PRC or regional reference clock LPR; And,
If described standard clock source is the satellite-based navigation system, described method also comprises:
The standard time ground transmission system is from satellite-based navigation system received RF analog signal, and the radio frequency analog signal that receives is converted to the described first standard time information.
9. a macro base station equipment is characterized in that, comprises very first time input interface, the second time input interface, control module and clock synchronization module, wherein:
Described very first time input interface is used for the first standard time information that acceptance criteria time ground transmission system transmits;
The described second time input interface is used to receive the second standard time information that the satellite-based navigation system provides;
Described control module, be used for receiving just often in predefined preferred standard temporal information, the preferred standard temporal information is sent to clock synchronization module, when the reception of preferred standard temporal information is broken down, carry out the switching in clock source, another standard time information is sent to clock synchronization module, and described preferred standard temporal information is the first standard time information or the second standard time information;
Described clock synchronization module is used for carrying out clock synchronization according to the standard time information that receives.
10. equipment as claimed in claim 9 is characterized in that,
Described control module, also be used for after the reception of preferred standard temporal information recovers normally, detect whether described preferred standard temporal information continues to receive normal in the time cycle of setting, described preferred standard temporal information continues to receive just often in the time cycle of confirming to set, carry out returning of clock source and cut, the preferred standard temporal information is sent to clock synchronization module.
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| CN 200910087524 Active CN101932092B (en) | 2009-06-23 | 2009-06-23 | Method and system for implementing macro base station clock synchronization and macro base station equipment |
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| CN102056285A (en) * | 2011-01-18 | 2011-05-11 | 大唐移动通信设备有限公司 | Clock synchronization method, system and equipment |
| WO2012071861A1 (en) * | 2010-12-03 | 2012-06-07 | 中兴通讯股份有限公司 | Method and system for time division duplex base station clock backup |
| WO2013010405A1 (en) * | 2011-07-20 | 2013-01-24 | 中兴通讯股份有限公司 | System synchronization control method and apparatus |
| CN102916921A (en) * | 2012-09-19 | 2013-02-06 | 华为技术有限公司 | Method, device and system for carrier synchronization |
| WO2013082812A1 (en) * | 2011-12-09 | 2013-06-13 | 华为技术有限公司 | Method and device for determining master clock device, and other method, device, and system |
| WO2013091202A1 (en) * | 2011-12-21 | 2013-06-27 | 华为技术有限公司 | Synchronization method, device and system |
| CN103260183A (en) * | 2013-04-19 | 2013-08-21 | 海能达通信股份有限公司 | Bothway electrical testing method and system |
| CN105992333A (en) * | 2015-02-04 | 2016-10-05 | 中国移动通信集团公司 | Processing method and processing apparatus of time synchronization of base station |
| CN106358283A (en) * | 2015-07-17 | 2017-01-25 | 中国移动通信集团公司 | Time synchronizing method, base station, transmission equipment and system |
| CN107147461A (en) * | 2017-04-07 | 2017-09-08 | 烽火通信科技股份有限公司 | The automatic selective system and method for a kind of LTE Femto access network methods of synchronization |
| CN107547188A (en) * | 2017-08-02 | 2018-01-05 | 北京东土军悦科技有限公司 | A kind of clock recovery method and device |
| CN109548068A (en) * | 2018-12-29 | 2019-03-29 | 京信通信系统（中国）有限公司 | A kind of measurement method of time delay, device, equipment and medium |
| CN109661027A (en) * | 2017-10-10 | 2019-04-19 | 大唐移动通信设备有限公司 | A kind of network equipment working state determines method and device |
| CN110784275A (en) * | 2018-07-29 | 2020-02-11 | 华为技术有限公司 | Time synchronization deviation adjusting method, device, terminal and access stratum equipment |
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| WO2012071861A1 (en) * | 2010-12-03 | 2012-06-07 | 中兴通讯股份有限公司 | Method and system for time division duplex base station clock backup |
| CN102056285A (en) * | 2011-01-18 | 2011-05-11 | 大唐移动通信设备有限公司 | Clock synchronization method, system and equipment |
| WO2013010405A1 (en) * | 2011-07-20 | 2013-01-24 | 中兴通讯股份有限公司 | System synchronization control method and apparatus |
| WO2013082812A1 (en) * | 2011-12-09 | 2013-06-13 | 华为技术有限公司 | Method and device for determining master clock device, and other method, device, and system |
| CN103597887B (en) * | 2011-12-21 | 2017-10-10 | 华为技术有限公司 | A kind of synchronous method, equipment and system |
| WO2013091202A1 (en) * | 2011-12-21 | 2013-06-27 | 华为技术有限公司 | Synchronization method, device and system |
| US9179429B2 (en) | 2011-12-21 | 2015-11-03 | Huawei Technologies Co., Ltd. | Synchronization method, device, and system |
| CN102916921A (en) * | 2012-09-19 | 2013-02-06 | 华为技术有限公司 | Method, device and system for carrier synchronization |
| CN102916921B (en) * | 2012-09-19 | 2016-03-30 | 华为技术有限公司 | A kind of carrier synchronization method, Apparatus and system |
| CN103260183A (en) * | 2013-04-19 | 2013-08-21 | 海能达通信股份有限公司 | Bothway electrical testing method and system |
| CN105992333A (en) * | 2015-02-04 | 2016-10-05 | 中国移动通信集团公司 | Processing method and processing apparatus of time synchronization of base station |
| CN106358283A (en) * | 2015-07-17 | 2017-01-25 | 中国移动通信集团公司 | Time synchronizing method, base station, transmission equipment and system |
| CN107147461A (en) * | 2017-04-07 | 2017-09-08 | 烽火通信科技股份有限公司 | The automatic selective system and method for a kind of LTE Femto access network methods of synchronization |
| CN107547188A (en) * | 2017-08-02 | 2018-01-05 | 北京东土军悦科技有限公司 | A kind of clock recovery method and device |
| CN107547188B (en) * | 2017-08-02 | 2020-04-24 | 北京东土军悦科技有限公司 | Clock recovery method and device |
| CN109661027A (en) * | 2017-10-10 | 2019-04-19 | 大唐移动通信设备有限公司 | A kind of network equipment working state determines method and device |
| CN109661027B (en) * | 2017-10-10 | 2020-10-16 | 大唐移动通信设备有限公司 | Method and device for determining working state of network equipment |
| CN110784275A (en) * | 2018-07-29 | 2020-02-11 | 华为技术有限公司 | Time synchronization deviation adjusting method, device, terminal and access stratum equipment |
| CN110784275B (en) * | 2018-07-29 | 2021-02-05 | 华为技术有限公司 | Time synchronization deviation adjusting method, device, terminal and access stratum equipment |
| US11503560B2 (en) | 2018-07-29 | 2022-11-15 | Huawei Technologies Co., Ltd. | Time synchronization offset adjustment method and apparatus, terminal, and access layer device |
| WO2020134810A1 (en) * | 2018-12-25 | 2020-07-02 | 维沃移动通信有限公司 | Methods for acquiring and sending time information, terminal and network device |
| CN109548068A (en) * | 2018-12-29 | 2019-03-29 | 京信通信系统（中国）有限公司 | A kind of measurement method of time delay, device, equipment and medium |
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