CN102056285A - Clock synchronization method, system and equipment - Google Patents
Clock synchronization method, system and equipment Download PDFInfo
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Abstract
The embodiment of the invention discloses a clock synchronization method, system and equipment, and relates to the technical field of wireless communication, which is used for solving the problem of invalid synchronization of the clock synchronization equipment. In the invention, at least two clock reference devices are arranged, wherein each clock reference device sends a clock reference signal of a local clock to the clock synchronization equipment; the clock synchronization equipment uses the clock reference signal sent from one clock reference device to carry out clock synchronization; and when the clock reference signal of the clock reference device is invalid, the clock reference signal sent from the other clock reference device is used for carrying out clock synchronization. Obviously, in the invention, when the current clock reference signal used in the process of carrying out clock synchronization by the clock synchronization equipment is invalid, the clock synchronization is carried out by continuously using the clock reference signal sent by the other clock reference device, so as to efficiently avoid the problem of invalid synchronization of the clock synchronization equipment caused by the invalidation of the current clock reference signal.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of clock synchronizing method, system and equipment.
Background technology
In 3G (Third Generation) Moblie standardization body (3GPP) network, it is global positioning system (Global Positioning System that maximum time synchronized schemes is adopted in the base station, GPS) time synchronized scheme, in this scheme, base station (eNB) receives gps signal, by a series of computing, realize the time synchronized of base station.But sometimes can cross weak or the GPS receiver breaks down, cause base station search the phenomenon of sync fail to occur less than gps satellite signal because of gps signal.Long-term sync fail meeting causes occurring between the base station timing offset, and timing offset is crossed senior general influences user terminal searching neighboring area, sub-district switching etc.These will further influence network quality, cause handoff failure, switching call drop, call completion ratio to descend, and have a strong impact on user experience.
When eNB adopts the gps time synchronization scenario, need be on each eNB GP configuring S receivers all.As shown in Figure 1.GPS receiver on each eNB must be kept in communication with 4 satellites simultaneously, could guarantee the synchronous of time.
ENB can also adopt official hour synchronization scenario in Electrical and Electronic engineering (IEEE) the 1588v2 agreement except adopting the gps time synchronization scenario, is called IEEE 1588v2 time synchronized scheme.
IEEE 1588v2 is a kind of exact time synchronization agreement, adopt IEEE 1588v2 time synchronized scheme, need configuration principal and subordinate synchro system, this system comprises main equipment that is provided with master clock and the slave unit that is provided with from clock, master clock cycle issuing time synchronous protocol and time information, receive the timestamp information that master clock is sent from clock, calculate time delay and principal and subordinate's time difference of principal and subordinate's circuit in view of the above, and utilize this time delay and principal and subordinate's time difference to adjust local zone time, make from clock to keep frequency and the phase place consistent, and then reach the time synchronized of slave unit and main equipment with master clock.
As shown in Figure 2, eNB needs in each eNB and each mobile management entity/gateway (MME/SGW) deploy IEEE 1588v2 agreement when adopting IEEE 1588v2 time synchronized scheme.Master clock is deployed in the MME/SGW place of core net, will be from the eNB that clock portion is deployed in.MME/SGW sets up two-way communication by IP network and eNB, transmits correct time and frequency synchronization information, thereby reaches time synchronized.
As shown in Figure 3, be software and hardware structure schematic diagram in main equipment and slave unit deploy.Hardware components mainly is made up of a high-precision hardware real-time clock and time tag unit, and software section mainly comprises time interface module and clock interface module.On main equipment, the time interface module is obtained the clock information of hardware real-time clock by the clock interface module, and the time tag unit is inserted into this clock information in the physical frame, and physical layer sends to slave unit with this physical frame.On slave unit, physical layer receives physical frame, and the time tag unit obtains clock information in the physical frame by parsing, local clock is adjusted according to this clock information by the time interface module then, so that local clock and main equipment clock synchronization.
In the universal mobile telecommunications system land radio access web (E-UTRAN) of evolution, can adopt IEEE 1588v2 agreement between MME/SGW and eNB, to make up the grouping return network, the time precise synchronization of nanosecond can be provided for the grouping return network, solve the bottleneck of general Ethernet length time of delay and synchronizing capacity difference, thereby provide a kind of scheme between node, to transmit clock signal accurately.
In realizing process of the present invention, the inventor finds to exist in the prior art following technical problem:
Description based on above-mentioned relevant existing scheme can be found, when adopting GPS to realize time synchronized in the base station, disturbed or block when gps signal, will cause base station search the phenomenon of sync fail to occur less than gps satellite signal, this will influence network quality, have a strong impact on user experience.
Summary of the invention
The embodiment of the invention provides a kind of clock synchronizing method, system and equipment, is used to solve the problem of clock synchronization device sync fail.
A kind of clock system, this system comprises clock synchronization device and at least two kinds of clock reference equipment, wherein:
Clock reference equipment is used for the clock reference signal to clock synchronization device transmission local clock;
Clock synchronization device is used to receive the clock reference signal from various clock reference equipment; The clock reference signal that uses wherein a kind of clock reference equipment to send carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.
A kind of clock synchronization device, this equipment comprises:
Signal element is used to receive the clock reference signal from various clock reference equipment;
Switch unit, the clock reference signal that is used to use wherein a kind of clock reference equipment of receiving to send carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.
A kind of clock synchronizing method, this method comprises:
Clock synchronization device receives the clock reference signal from multiple clock reference equipment;
The clock reference signal that wherein a kind of clock reference equipment that the clock synchronization device use receives is sent carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.
Among the present invention, be deployed with at least two kinds of clock reference equipment, every kind of clock reference equipment sends the clock reference signal of local clock to clock synchronization device, the clock reference signal that clock synchronization device uses wherein a kind of clock reference equipment to send carries out clock synchronization, and when the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.As seen, among the present invention, clock synchronization device is carrying out the employed present clock reference signal of clock synchronization when losing efficacy, the clock reference signal that can continue to use other clock reference equipment to send carries out clock synchronization, thereby has effectively avoided because the problem of the clock synchronization device sync fail that the inefficacy of present clock reference signal is brought.
Description of drawings
Fig. 1 is a gps time synchronous system architecture schematic diagram of the prior art;
Fig. 2 is an IEEE 1588v2 clock synchronization system structural representation of the prior art;
Fig. 3 is an IEEE 1588v2 device structure schematic diagram of the prior art;
The system configuration schematic diagram that Fig. 4 provides for the embodiment of the invention;
The device structure schematic diagram that Fig. 5 provides for the embodiment of the invention;
The method flow schematic diagram that Fig. 6 provides for the embodiment of the invention;
Fig. 7 is the schematic flow sheet of the embodiment of the invention one;
Fig. 8 is the schematic flow sheet of the embodiment of the invention two.
Embodiment
In order to solve the problem that sync fail appears in clock synchronization device, the embodiment of the invention provides a kind of clock system, in the native system, by the clock reference signal of at least two kinds of clock reference equipment to clock synchronization device transmission local clock, the clock reference signal that clock synchronization device uses wherein a kind of clock reference equipment to send carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.
The clock system that the embodiment of the invention provides comprises clock synchronization device and at least two kinds of clock reference equipment, wherein:
Clock reference equipment is used for the clock reference signal to clock synchronization device transmission local clock;
Clock synchronization device is used to receive the clock reference signal from various clock reference equipment; The clock reference signal that uses wherein a kind of clock reference equipment to send carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.Clock reference signal lost efficacy and was meant, because clock reference signal is second-rate, caused using this clock reference signal to carry out clock synchronization.Clock reference signal is effective, is meant because the quality of clock reference signal is better, makes and can use this clock reference signal to carry out clock synchronization.
As shown in Figure 4, described at least two kinds of clock reference equipment comprise: satellite equipment among the GPS and IEEE1588v2 main equipment (promptly supporting the master clock server of IEEE 1588v2 agreement);
Described clock synchronization device comprises:
Gps signal receiving element (being the GPS receiver) is used to receive the clock sync signal from satellite equipment, and calculates clock synchronization information according to this clock sync signal;
IEEE 1588v2 protocol processing unit (i.e. unit as shown in Figure 3) is used to receive the clock sync signal from the IEEE1588v2 main equipment, and calculates clock synchronization information according to this clock sync signal;
Switch unit is used for determining to use satellite equipment or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization;
If determine to use the clock reference signal of satellite equipment to carry out clock synchronization, the clock synchronization information of then selecting to use the gps signal receiving element to calculate carries out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects satellite equipment and IEEE 1588v2 main equipment is effective, reselects the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate and carry out clock synchronization;
If determine to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization, the clock synchronization information of then selecting to use IEEE 1588v2 protocol processing unit to calculate carries out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects IEEE 1588v2 main equipment and satellite equipment is effective, reselects the clock synchronization information that uses the gps signal receiving element to calculate and carry out clock synchronization.
Described switch unit is used for:
Determine to use satellite equipment in the following manner or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization:
Determine that according to configuration information the main synchronization mechanism of current employing is GPS synchronization mechanism or IEEE1588v2 synchronization mechanism; If the GPS synchronization mechanism is then determined to use the clock reference signal of satellite equipment to carry out clock synchronization: if IEEE 1588v2 synchronization mechanism then determines to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization.
Described switch unit is used for:
The clock reference signal that detects satellite equipment in the following manner lost efficacy:
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of satellite equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, start timer, if the mass parameter value of the clock reference signal that satellite equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that satellite equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value; The first signal quality threshold value and secondary signal quality gate limit value are the numerical value greater than 0.
Described switch unit is used for:
Whether the clock reference signal that detects IEEE 1588v2 main equipment in the following manner lost efficacy:
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, start timer, if the mass parameter value of the clock reference signal that IEEE 1588v2 main equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that IEEE 1588v2 main equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
Described switch unit is further used for:
After reselecting the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate and carrying out clock synchronization, whether the clock reference signal of determining satellite equipment reverts to effectively, when being defined as being, the clock synchronization information that uses the gps signal receiving element to calculate carries out clock synchronization.
Described switch unit is further used for:
After reselecting the clock synchronization information that uses the gps signal receiving element to calculate and carrying out clock synchronization, whether the clock reference signal of determining IEEE 1588v2 main equipment reverts to effectively, when being defined as being, the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate carries out clock synchronization.
Clock synchronization device in the native system can carry out the equipment of clock synchronization for any needs such as base stations.Described IEEE 1588v2 main equipment can be deployed on mobile management entity (MME) or the gateway (SGW), perhaps independent the deployment.
Clock synchronization device in the native system can also comprise the satellite equipment in the big-dipper satellite system, any equipment that clock reference signal can be provided such as satellite equipment in the Ge Luonasi satellite system.
Referring to Fig. 5, the embodiment of the invention also provides a kind of clock synchronization device, and this equipment comprises:
Signal element is used to receive the clock reference signal from various clock reference equipment;
Switch unit, the clock reference signal that is used to use wherein a kind of clock reference equipment of receiving to send carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.
Described signal element comprises:
The gps signal receiving element is used to receive the clock sync signal from satellite equipment, and calculates clock synchronization information according to this clock sync signal;
IEEE 1588v2 protocol processing unit is used to receive the clock sync signal from IEEE 1588v2 main equipment, and calculates clock synchronization information according to this clock sync signal;
Described switch unit is used for:
Determine to use satellite equipment or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization;
If determine to use the clock reference signal of satellite equipment to carry out clock synchronization, the clock synchronization information of then selecting to use the gps signal receiving element to calculate carries out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects satellite equipment and IEEE 1588v2 main equipment is effective, reselects the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate and carry out clock synchronization;
If determine to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization, the clock synchronization information of then selecting to use IEEE 1588v2 protocol processing unit to calculate carries out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects IEEE 1588v2 main equipment and satellite equipment is effective, reselects the clock synchronization information that uses the gps signal receiving element to calculate and carry out clock synchronization.
Described switch unit is used for:
Determine to use satellite equipment in the following manner or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization:
Determine that according to configuration information the main synchronization mechanism of current employing is GPS synchronization mechanism or IEEE1588v2 synchronization mechanism; If the GPS synchronization mechanism is then determined to use the clock reference signal of satellite equipment to carry out clock synchronization: if IEEE 1588v2 synchronization mechanism then determines to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization.
Described switch unit is used for:
The clock reference signal that detects satellite equipment in the following manner lost efficacy:
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of satellite equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, start timer, if the mass parameter value of the clock reference signal that satellite equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that satellite equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
Described switch unit is used for:
Whether the clock reference signal that detects IEEE 1588v2 main equipment in the following manner lost efficacy:
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, start timer, if the mass parameter value of the clock reference signal that IEEE 1588v2 main equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that IEEE 1588v2 main equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
Described switch unit is further used for:
After reselecting the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate and carrying out clock synchronization, whether the clock reference signal of determining satellite equipment reverts to effectively, when being defined as being, the clock synchronization information that uses the gps signal receiving element to calculate carries out clock synchronization.
Described switch unit is further used for:
After reselecting the clock synchronization information that uses the gps signal receiving element to calculate and carrying out clock synchronization, whether the clock reference signal of determining IEEE 1588v2 main equipment reverts to effectively, when being defined as being, the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate carries out clock synchronization.
Described clock synchronization device is the base station.Described IEEE 1588v2 main equipment can be deployed on mobile management entity (MME) or the gateway (SGW), perhaps independent the deployment.
Referring to Fig. 6, the embodiment of the invention also provides a kind of clock synchronizing method, specifically may further comprise the steps:
Step 60: clock synchronization device receives the clock reference signal from multiple clock reference equipment;
Step 61: the clock reference signal that wherein a kind of clock reference equipment that the clock synchronization device use receives is sent carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.
The specific implementation of step 60 can be as follows:
Clock synchronization device receives the clock sync signal from satellite equipment, and calculates first clock synchronization information according to this clock sync signal; Reception is from the clock sync signal of IEEE 1588v2 main equipment, and calculates the second clock synchronizing information according to this clock sync signal;
Accordingly, being implemented as follows of step 61:
Clock synchronization device determines to use satellite equipment or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization; If determine to use the clock reference signal of satellite equipment to carry out clock synchronization, then select to use first clock synchronization information to carry out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects satellite equipment and IEEE 1588v2 main equipment is effective, reselects and use the second clock synchronizing information to carry out clock synchronization; If determine to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization, then select to use the second clock synchronizing information to carry out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects IEEE 1588v2 main equipment and satellite equipment is effective, reselects and use first clock synchronization information to carry out clock synchronization.
Above-mentioned definite use satellite equipment or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization, its specific implementation can be as follows:
Clock synchronization device determines that according to configuration information the main synchronization mechanism of current employing is GPS synchronization mechanism or IEEE 1588v2 synchronization mechanism; If the GPS synchronization mechanism is then determined to use the clock reference signal of satellite equipment to carry out clock synchronization: if IEEE 1588v2 synchronization mechanism then determines to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization.
The clock reference signal of above-mentioned detection satellite equipment lost efficacy, and its specific implementation can be as follows:
Clock synchronization device determines whether the mass parameter value of the current clock reference signal that receives of satellite equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of satellite equipment lost efficacy; Perhaps,
Clock synchronization device determines whether the mass parameter value of the current clock reference signal that receives of satellite equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, start timer, if the mass parameter value of the clock reference signal that satellite equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that satellite equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
The clock reference signal of above-mentioned detection IEEE 1588v2 main equipment lost efficacy, and its specific implementation can be as follows:
Clock synchronization device determines whether the mass parameter value of the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of IEEE1588v2 main equipment lost efficacy; Perhaps,
Clock synchronization device determines whether the mass parameter value of the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, start timer, if the mass parameter value of the clock reference signal that IEEE 1588v2 main equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that IEEE 1588v2 main equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
Preferable, clock synchronization device reselect use the second clock synchronizing information to carry out clock synchronization after, can determine whether the clock reference signal of satellite equipment reverts to effectively, when being defined as being, use first clock synchronization information to carry out clock synchronization.
Preferable, clock synchronization device reselect use first clock synchronization information to carry out clock synchronization after, whether the clock reference signal that can determine IEEE 1588v2 main equipment reverts to effectively, when being defined as being, uses the second clock synchronizing information to carry out clock synchronization.
In this method, described clock synchronization device is the base station.Described IEEE 1588v2 main equipment can be deployed on mobile management entity (MME) or the gateway (SGW), perhaps independent the deployment.
Below the present invention is specifically described:
At first need dispose gps time synchro system and IEEE 1588v2 clock synchronization system simultaneously, comprise its corresponding software system and hardware system at eNB.
Simultaneously dispose switch unit, switch and function such as input with the intelligence that realizes time synchronized at eNB.Set condition that the gps clock reference signal lost efficacy and be the gps clock reference signal decay to can't be normally and gps satellite carry out time synchronized.
Embodiment one:
In the present embodiment, gps system is the clock synchronization system of current use, loses efficacy if detect the gps clock reference signal, then uses IEEE 1588v2 clock reference signal to carry out clock synchronization.As shown in Figure 7, concrete steps are as follows:
Step 70: the gps signal receiving element of base station receives the clock sync signal from satellite equipment, calculates clock synchronization information according to this clock sync signal, and clock synchronization information is reported switch unit; IEEE 1588v2 protocol processing unit receives the clock sync signal from IEEE 1588v2 main equipment, and calculates clock synchronization information according to this clock sync signal, and clock synchronization information is reported switch unit; After switch unit determined that according to configuration information the main synchronization mechanism of current employing is the GPS synchronization mechanism, the clock synchronization information that uses the gps signal receiving element to report carried out clock synchronization;
Step 71: the validity of the clock sync signal of switch unit detection satellite equipment and the clock sync signal of IEEE 1588v2 main equipment;
Step 72: switch unit determines whether the clock sync signal of satellite equipment lost efficacy, if, then arrive step 73, otherwise, step 70 returned;
Step 73: switch unit determines whether the clock sync signal of IEEE 1588v2 main equipment is effective, if, then arrive step 74, otherwise, step 71 returned;
Step 74: the clock synchronization information that uses IEEE 1588v2 protocol processing unit to report carries out clock synchronization.
Embodiment two:
In the present embodiment, IEEE 1588v2 system is the clock synchronization system of current use, recovers effectively then to use the gps clock reference signal to carry out clock synchronization if detect the gps clock reference signal.As shown in Figure 8, concrete steps are as follows:
Step 80: the clock synchronization information that the switch unit of base station uses IEEE 1588v2 protocol processing unit to report carries out clock synchronization;
Step 81: detect the gps clock reference signal and whether return to effective status, if, then arrive step 82, otherwise, continue to detect the gps clock reference signal and whether return to effective status;
Step 82: judge in time t whether continuous and effective of gps clock reference signal, if, then arrive step 83, otherwise, step 81 returned;
Step 83: the clock synchronization information that uses the gps signal receiving element to report carries out clock synchronization.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the invention provides, be deployed with at least two kinds of clock reference equipment, every kind of clock reference equipment sends the clock reference signal of local clock to clock synchronization device, the clock reference signal that clock synchronization device uses wherein a kind of clock reference equipment to send carries out clock synchronization, and when the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.As seen, among the present invention, clock synchronization device is carrying out the employed present clock reference signal of clock synchronization when losing efficacy, the clock reference signal that can continue to use other clock reference equipment to send carries out clock synchronization, thereby has effectively avoided because the problem of the clock synchronization device sync fail that the inefficacy of present clock reference signal is brought.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
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 (23)
1. a clock system is characterized in that, this system comprises clock synchronization device and at least two kinds of clock reference equipment, wherein:
Clock reference equipment is used for the clock reference signal to clock synchronization device transmission local clock;
Clock synchronization device is used to receive the clock reference signal from various clock reference equipment; The clock reference signal that uses wherein a kind of clock reference equipment to send carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.
2. the system as claimed in claim 1 is characterized in that, described at least two kinds of clock reference equipment comprise: satellite equipment in the global position system GPS and Electrical and Electronic engineering IEEE 1588v2 main equipment;
Described clock synchronization device comprises:
The gps signal receiving element is used to receive the clock sync signal from satellite equipment, and calculates clock synchronization information according to this clock sync signal;
IEEE 1588v2 protocol processing unit is used to receive the clock sync signal from IEEE 1588v2 main equipment, and calculates clock synchronization information according to this clock sync signal;
Switch unit is used for determining to use satellite equipment or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization;
If determine to use the clock reference signal of satellite equipment to carry out clock synchronization, the clock synchronization information of then selecting to use the gps signal receiving element to calculate carries out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects satellite equipment and IEEE 1588v2 main equipment is effective, reselects the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate and carry out clock synchronization;
If determine to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization, the clock synchronization information of then selecting to use IEEE 1588v2 protocol processing unit to calculate carries out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects IEEE 1588v2 main equipment and satellite equipment is effective, reselects the clock synchronization information that uses the gps signal receiving element to calculate and carry out clock synchronization.
3. system as claimed in claim 2 is characterized in that, described switch unit is used for:
Determine to use satellite equipment in the following manner or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization:
Determine that according to configuration information the main synchronization mechanism of current employing is GPS synchronization mechanism or IEEE1588v2 synchronization mechanism; If the GPS synchronization mechanism is then determined to use the clock reference signal of satellite equipment to carry out clock synchronization: if IEEE 1588v2 synchronization mechanism then determines to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization.
4. system as claimed in claim 2 is characterized in that, described switch unit is used for:
The clock reference signal that detects satellite equipment in the following manner lost efficacy:
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of satellite equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, starts timer, and,
If the mass parameter value of the clock reference signal that satellite equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that satellite equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
5. system as claimed in claim 2 is characterized in that, described switch unit is used for:
Whether the clock reference signal that detects IEEE 1588v2 main equipment in the following manner lost efficacy:
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, starts timer, and:
If the mass parameter value of the clock reference signal that IEEE 1588v2 main equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that the IEEE1588v2 main equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
6. system as claimed in claim 2 is characterized in that, described switch unit is further used for:
After reselecting the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate and carrying out clock synchronization, whether the clock reference signal of determining satellite equipment reverts to effectively, when being defined as being, the clock synchronization information that uses the gps signal receiving element to calculate carries out clock synchronization.
7. system as claimed in claim 2 is characterized in that, described switch unit is further used for:
After reselecting the clock synchronization information that uses the gps signal receiving element to calculate and carrying out clock synchronization, whether the clock reference signal of determining IEEE 1588v2 main equipment reverts to effectively, when being defined as being, the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate carries out clock synchronization.
8. as arbitrary described system among the claim 1-7, it is characterized in that described clock synchronization device is the base station.
9. system as claimed in claim 8 is characterized in that, described IEEE 1588v2 main equipment is deployed on mobile management entity MME or the gateway SGW, perhaps independent the deployment.
10. a clock synchronization device is characterized in that, this equipment comprises:
Signal element is used to receive the clock reference signal from various clock reference equipment;
Switch unit, the clock reference signal that is used to use wherein a kind of clock reference equipment of receiving to send carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.
11. equipment as claimed in claim 10 is characterized in that, described signal element comprises:
The gps signal receiving element is used to receive the clock sync signal from satellite equipment, and calculates clock synchronization information according to this clock sync signal;
IEEE 1588v2 protocol processing unit is used to receive the clock sync signal from IEEE 1588v2 main equipment, and calculates clock synchronization information according to this clock sync signal;
Described switch unit is used for:
Determine to use satellite equipment or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization;
If determine to use the clock reference signal of satellite equipment to carry out clock synchronization, the clock synchronization information of then selecting to use the gps signal receiving element to calculate carries out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects satellite equipment and IEEE 1588v2 main equipment is effective, reselects the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate and carry out clock synchronization;
If determine to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization, the clock synchronization information of then selecting to use IEEE 1588v2 protocol processing unit to calculate carries out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects IEEE 1588v2 main equipment and satellite equipment is effective, reselects the clock synchronization information that uses the gps signal receiving element to calculate and carry out clock synchronization.
12. equipment as claimed in claim 11 is characterized in that, described switch unit is used for:
Determine to use satellite equipment in the following manner or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization:
Determine that according to configuration information the main synchronization mechanism of current employing is GPS synchronization mechanism or IEEE1588v2 synchronization mechanism; If the GPS synchronization mechanism is then determined to use the clock reference signal of satellite equipment to carry out clock synchronization: if IEEE 1588v2 synchronization mechanism then determines to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization.
13. equipment as claimed in claim 11 is characterized in that, described switch unit is used for:
The clock reference signal that detects satellite equipment in the following manner lost efficacy:
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of satellite equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, starts timer, and:
If the mass parameter value of the clock reference signal that satellite equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that satellite equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
14. equipment as claimed in claim 11 is characterized in that, described switch unit is used for:
Whether the clock reference signal that detects IEEE 1588v2 main equipment in the following manner lost efficacy:
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, starts timer, and:
If the mass parameter value of the clock reference signal that IEEE 1588v2 main equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that the IEEE1588v2 main equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
15. equipment as claimed in claim 11 is characterized in that, described switch unit is further used for:
After reselecting the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate and carrying out clock synchronization, whether the clock reference signal of determining satellite equipment reverts to effectively, when being defined as being, the clock synchronization information that uses the gps signal receiving element to calculate carries out clock synchronization.
16. equipment as claimed in claim 11 is characterized in that, described switch unit is further used for:
After reselecting the clock synchronization information that uses the gps signal receiving element to calculate and carrying out clock synchronization, whether the clock reference signal of determining IEEE 1588v2 main equipment reverts to effectively, when being defined as being, the clock synchronization information that uses IEEE 1588v2 protocol processing unit to calculate carries out clock synchronization.
17. a clock synchronizing method is characterized in that, this method comprises:
Clock synchronization device receives the clock reference signal from multiple clock reference equipment;
The clock reference signal that wherein a kind of clock reference equipment that the clock synchronization device use receives is sent carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out clock synchronization.
18. method as claimed in claim 17 is characterized in that, the clock reference signal that described clock synchronization device receives from multiple clock reference equipment comprises:
Clock synchronization device receives the clock sync signal from satellite equipment, and calculates first clock synchronization information according to this clock sync signal; Reception is from the clock sync signal of IEEE 1588v2 main equipment, and calculates the second clock synchronizing information according to this clock sync signal;
The clock reference signal that wherein a kind of clock reference equipment that described clock synchronization device use receives is sent carries out clock synchronization; When the clock reference signal that detects this kind clock reference equipment lost efficacy, the clock reference signal that uses other clock reference equipment to send carried out the clock synchronization switch unit and comprises:
Clock synchronization device determines to use satellite equipment or the clock reference signal of IEEE 1588v2 main equipment carries out clock synchronization; If determine to use the clock reference signal of satellite equipment to carry out clock synchronization, then select to use first clock synchronization information to carry out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects satellite equipment and IEEE 1588v2 main equipment is effective, reselects and use the second clock synchronizing information to carry out clock synchronization; If determine to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization, then select to use the second clock synchronizing information to carry out clock synchronization, and when the clock reference signal of clock reference signal inefficacy that detects IEEE 1588v2 main equipment and satellite equipment is effective, reselects and use first clock synchronization information to carry out clock synchronization.
19. method as claimed in claim 18 is characterized in that, the described definite use satellite equipment or the clock reference signal of IEEE 1588v2 main equipment carry out clock synchronization and comprise:
Determine that according to configuration information the main synchronization mechanism of current employing is GPS synchronization mechanism or IEEE1588v2 synchronization mechanism; If the GPS synchronization mechanism is then determined to use the clock reference signal of satellite equipment to carry out clock synchronization: if IEEE 1588v2 synchronization mechanism then determines to use the clock reference signal of IEEE 1588v2 main equipment to carry out clock synchronization.
20. method as claimed in claim 18 is characterized in that, the clock reference signal of described detection satellite equipment lost efficacy and comprised:
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of satellite equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of satellite equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, starts timer, and:
If the mass parameter value of the clock reference signal that satellite equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that satellite equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of satellite equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
21. method as claimed in claim 18 is characterized in that, the clock reference signal of described detection IEEE 1588v2 main equipment lost efficacy:
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than the predefined first signal quality threshold value, when being defined as being, determines that the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps,
Whether the mass parameter value of determining the current clock reference signal that receives of IEEE 1588v2 main equipment is lower than predefined secondary signal quality gate limit value and is higher than the first signal quality threshold value, when being defined as being, starts timer, and:
If the mass parameter value of the clock reference signal that IEEE 1588v2 main equipment receives in the time before this timer expiry all is lower than secondary signal quality gate limit value and is higher than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; Perhaps, if the mass parameter value of the clock reference signal that the IEEE1588v2 main equipment receives before timer expiry is lower than the first signal quality threshold value, determine that then the clock reference signal of IEEE 1588v2 main equipment lost efficacy; The first signal quality threshold value is less than secondary signal quality gate limit value.
22. method as claimed in claim 18 is characterized in that, this method further comprises:
Reselect use the second clock synchronizing information to carry out clock synchronization after, determine whether the clock reference signal of satellite equipment reverts to effectively, when being defined as being, use first clock synchronization information to carry out clock synchronization.
23. method as claimed in claim 18 is characterized in that, this method further comprises:
Reselect use first clock synchronization information to carry out clock synchronization after, determine whether the clock reference signal of IEEE 1588v2 main equipment reverts to effectively, when being defined as being, use second clock synchronizing information is carried out clock synchronization.
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| CN103796297A (en) * | 2014-01-24 | 2014-05-14 | 刘泽钰 | Achieving device and method for synchronization of FEMTO base stations |
| CN103840933A (en) * | 2013-12-10 | 2014-06-04 | 北京北方烽火科技有限公司 | Method and switch for achieving clock synchronization |
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| 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 |
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| CN110032058A (en) * | 2019-04-17 | 2019-07-19 | 北京电子工程总体研究所 | A kind of time service equipment, time dissemination system and time service method |
| CN110032058B (en) * | 2019-04-17 | 2021-12-14 | 北京电子工程总体研究所 | Time service equipment, time service system and time service method |
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Application publication date: 20110511 |