The automatic selective system and method for a kind of LTE Femto access network methods of synchronizationTechnical field
The present invention relates to communication technical field, in particular to a kind of LTE Femto access network methods of synchronization it is automaticSelect system and method.
Background technology
With the general of intelligent terminal and application, increasing user begins to use and relies on mobile Internet business and regardFrequency class business.The change of terminal user's use habit, is allowed to the requirement to mobile network data ability and also improves therewith.According to systemMeter, in 2G networks, in-door covering area accounts for 20% or so of the whole network area, and from indoor telephone traffic occupy 70% withOn；The 3G epoch are arrived, the Mobile Transmission more than 50% occurs in building, and almost 80% high-speed data service occursIndoors.And LTE (Long Term Evolution, Long Term Evolution) the 4G epoch for having arrived, 94% mobile serviceIt is data service, while the data service more than 90% will occur in interior.
LTE Femto supplement macro base station as the LTE epoch and solve the problems, such as that the popular of in-door covering selects, gradually by industryConcern.LTE Femto micro-base stations are a kind of small-sized, low-power consumption femtocell technologies, will be mobile with the air interface of standardTerminal is linked into the core network of operator by fixed broadband circuit, is mainly used in the indoor place such as family and medium-sized and small enterprises,The effective supplement covered indoors as Cellular Networks, provides the user voice, video, high-speed real-time and other new industryBusiness.By the standard and frequency spectrum of compatible existing cellular network, user need not change mobile terminal (such as mobile phone, IPAD), justHigh-quality indoor communications service can be enjoyed, periphery macro base station load can be mitigated, and the related resource of macro base station also may be usedTo be more concentrated at serving outdoor user.
LTE Femto are used for interior, and synchronous condition can not then ensure, if synchronization can not be completed, and LTE Femto will be intoFor an isolated island.The current method of synchronization mainly has 3 kinds：GPS, IEEE1588 and air interface synchronization, in the prior art, this 3 kinds of synchronizationsWay choice, is all, by experienced artificial carry out analysis judgement, then to manually select the method for synchronization, not only inefficiency,It also adds additional cost of labor.
The content of the invention
It is synchronous it is an object of the invention to provide a kind of LTE Femto access networks for defect present in prior artThe automatic selective system and method for mode, can automatically select the method for synchronization of LTE Femto access networks, improve efficiency, reductionCost of labor.
To achieve the above objectives, the present invention takes a kind of automatic selective system of the LTE Femto access network methods of synchronization, wrapsInclude：
GPS module, for passing through GPS modes synchronization LTE Femto access networks；
IEEE1588 modules, for passing through IEEE1588 modes synchronization LTE Femto access networks；
Eat dishes without rice or wine module, for passing through mode synchronization LTE Femto access networks of eating dishes without rice or wine；
Selecting module, for selecting GPS module, IEEE1588 modules or module of eating dishes without rice or wine to synchronize, during selection, GPS mouldsThe priority of block is more than IEEE1588 modules, and the priority of IEEE1588 modules is more than module of eating dishes without rice or wine.
On the basis of above-mentioned technical proposal, the GPS module and IEEE1588 inside modules are respectively provided with a 1PPS and postedStorage, judges whether 1PPS signals lock for selective module, when 1PPS signals are not locked, where correspondence registerModule is without using selecting module selects next priority block.
On the basis of above-mentioned technical proposal, the selection listens to adjacent area, is to eat dishes without rice or wine that to pass through mode of eating dishes without rice or wine synchronous for moduleThe premise of LTE Femto access networks.
The present invention also provides a kind of automatic selecting method of the LTE Femto access network methods of synchronization, is based on automatically selectingSystem, including a selecting module and module of eating dishes without rice or wine, automatic selective system receives core net and set after response, into synchronization process：When there is GPS module, selecting module judges whether the 1PPS signals of 1PPS registers in GPS module lock, if so, passing throughGPS modes synchronize processing；When there is IEEE1588 modules, and deposited in the absence of 1PPS in GPS module or GPS moduleWhen the 1PPS signals of device are not locked, selecting module judges whether the 1PPS signals of the 1PPS registers in IEEE1588 modules are lockedIt is fixed, if so, synchronizing processing by IEEE1588 modes；When in the absence of GPS module and IEEE1588 modules orWhen the 1PPS signals of 1PPS registers in IEEE1588 modules are not locked, selecting module judges whether to listen to adjacent area, ifIt is that module of eating dishes without rice or wine synchronizes processing by the mode of eating dishes without rice or wine；If it is not, synchronization failure, terminates.
On the basis of above-mentioned technical proposal, the 1PPS signals of 1PPS registers are not locked in the GPS module, explanationGps signal is not present or gps signal is weak.
On the basis of above-mentioned technical proposal, the 1PPS signals of the 1PPS registers in the IEEE1588 modules are not lockedIt is fixed, illustrate that IEEE1588 messages are not present or IEEE1588 message distortions.
On the basis of above-mentioned technical proposal, when the GPS modes synchronize processing, selecting module first passes through RS232Interface extracts current time information, and the simultaneously operating request for carrying current time information is sent to GPS module, and GPS module is carried outAfter synchronization, feedback synchronization status information is to selecting module, and selecting module checks synchronously whether succeed according to feedback is received, if so,Synchronously complete, if it is not, synchronization failure.
On the basis of above-mentioned technical proposal, when the IEEE1588 modes synchronize processing, selecting module is first passed throughPTP extracts current time information, and the simultaneously operating request for carrying current time information, IEEE1588 are sent to IEEE1588 modulesAfter module is synchronized, feedback synchronization status information to selecting module, selecting module according to receive feedback check it is synchronous whether intoWork(, if so, synchronously completing, if it is not, synchronization failure.
On the basis of above-mentioned technical proposal, when the mode of eating dishes without rice or wine synchronizes processing, selecting module first extracts monitoringThe neighboring BS information arrived, the simultaneously operating request for carrying neighboring BS information, after module of eating dishes without rice or wine is synchronized, feedback are sent to module of eating dishes without rice or wineSynchronization Status Message is to selecting module, and selecting module checks synchronously whether succeed according to feedback is received, if so, synchronously complete, ifIt is no, synchronization failure.
The beneficial effects of the present invention are：By setting up the priority of the LTE Femto access networks method of synchronization not of the same race, it isSystem automatically selects the method for synchronization, without manual analysis and manually selects, and improves selection and synchronous efficiency, reduces cost of labor, andAnd system can select the best method of synchronization according to priority.
Brief description of the drawings
Fig. 1 is the schematic diagram of the automatic selective system of the LTE Femto access network methods of synchronization of the embodiment of the present invention；
Fig. 2 is the flow chart of the automatic selecting method of the LTE Femto access network methods of synchronization of the embodiment of the present invention；
Fig. 3 is that the embodiment of the present invention passes through the synchronous flow chart of GPS modes；
Fig. 4 is that the embodiment of the present invention passes through the synchronous flow chart of IEEE1588 modes；
Fig. 5 is that the embodiment of the present invention passes through the synchronous flow chart of mode of eating dishes without rice or wine；
Reference：
GPS module 1, IEEE1588 modules 2, module of eating dishes without rice or wine 3, selecting module 4.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
As shown in figure 1, the automatic selective system of the LTE Femto access network methods of synchronization of the present invention, including GPS module 1,IEEE1588 modules 2, module of eating dishes without rice or wine 3 and selecting module 4.Specifically, GPS module 1 is used to pass through GPS modes synchronization LTEFemto access networks, the inside of GPS module 1 sets the first 1PPS (1pulse per second, a pulse per second (PPS)) register, is used forSelective module 4 judges whether the first 1PPS signals lock, when the first 1PPS semaphore locks, chooses corresponding GPS module 1 and entersRow is synchronous；When the first 1PPS signals are not locked, selecting module 4 selects module (the i.e. IEEE1588 moulds of next priorityBlock 2) judged.IEEE1588 modules 2 are used to pass through IEEE1588 modes synchronization LTE Femto access networks, IEEE1588 mouldsThe inside of block 2 sets a 2nd 1PPS register, judges whether the 2nd 1PPS signals lock for selective module 4, and secondDuring 1PPS semaphore locks, choose IEEE1588 modules 2 and synchronize；When the 2nd 1PPS signals are not locked, selecting module 4 is selectedThe module (module 3 of eating dishes without rice or wine) for selecting next priority is synchronized.Module of eating dishes without rice or wine 3 is used to pass through the mode synchronization LTE that eats dishes without rice or wineFemto access networks, module of eating dishes without rice or wine 3 is by the premise for mode synchronization LTE Femto access networks of eating dishes without rice or wine：Selecting module is eated dishes without rice or wineAdjacent area is monitored, and listens to adjacent area.
Automatic selective system of the present invention receives core net and set after response, into synchronization process：
When there is GPS module, selecting module judges whether the 1PPS signals of 1PPS registers in GPS module lock, ifIt is that processing is synchronized by GPS modes；
When there is IEEE1588 modules, and in the absence of the 1PPS signals of 1PPS registers in GPS module or GPS moduleWhen not locking, selecting module judges whether the 1PPS signals of the 1PPS registers in IEEE1588 modules lock, if so, passing throughIEEE1588 modes synchronize processing；
The 1PPS letters of 1PPS registers in the absence of GPS module and IEEE1588 modules or IEEE1588 modulesWhen number not locking, selecting module judges whether to listen to adjacent area, if so, module of eating dishes without rice or wine synchronizes place by the mode of eating dishes without rice or wineReason；If it is not, synchronization failure, terminates.
As shown in Fig. 2 in being the present embodiment, the detailed stream of the automatic selecting method of the LTE Femto access network methods of synchronizationCheng Tu, detailed step includes：
S1. automatic selective system receives core net and set after response, into synchronization process.
S2. selecting module 4 judges whether to read the first 1PPS registers in GPS module 1, if so, into S3；IfIt is no, into S5；
S3. judge whether the first 1PPS signals of the first 1PPS registers lock, if so, into S4；If it is not, explanation GPSSignal is not present or gps signal is weak, into S5.
S4.GPS modules 1 synchronize processing by GPS modes, terminate；
S5. selecting module 4 judges whether to read the 2nd 1PPS registers in IEEE1588 modules 2, if so, intoS6；If it is not, explanation IEEE1588 messages are not present or IEEE1588 message distortions, into S8；
S6. judge whether the 2nd 1PPS signals of the 2nd 1PPS registers lock, if so, into S7；If it is not, into S8；
S7.IEEE1588 modules 2 synchronize processing by IEEE1588, terminate；
S8. selecting module 4 carries out adjacent area monitoring of eating dishes without rice or wine by LTE Sniffer, and judges whether to listen to adjacent area, ifIt is, into S9, if it is not, into S10；
S9. module of eating dishes without rice or wine 3 synchronizes processing by the mode of eating dishes without rice or wine, and terminates；
S10. synchronization failure, terminates.
As shown in figure 3, synchronizing the flow chart of processing for GPS modes in the present embodiment, specific steps include：
A101. selecting module 4 extracts current UTC (Universal Time Coordinated, association by RS232 interfacesAdjust universal time) temporal information.
A102. selecting module 4 sends the simultaneously operating request for carrying current time information to GPS module 1.
A103.GPS modules 1 are received after simultaneously operating request, and LTE is carried out by GPS modes according to current time informationFemto access networks are synchronous.
Synchronization Status Message is fed back to selecting module 4 by A104.GPS modules 1.
A105. selecting module 4 checks synchronously whether succeed according to Synchronization Status Message, if so, into A106, if it is not, enteringEnter A107.
A106. synchronously complete, terminate.
A107. synchronization failure, terminates.
As shown in figure 4, synchronizing the flow chart of processing for IEEE1588 modes in the present embodiment, specific steps include：
B101. selecting module 4 extracts current UTC temporal information by PTP.
B102. selecting module 4 sends the simultaneously operating request for carrying current time information to IEEE1588 modules 2.
B103.IEEE1588 modules 2 are received after simultaneously operating request, and IEEE1588 modes are passed through according to current time informationCarry out LTE Femto access networks synchronous.
Synchronization Status Message is fed back to selecting module 4 by B104.IEEE1588 modules 2.
B105. selecting module 4 checks synchronously whether succeed according to Synchronization Status Message, if so, into B106, if it is not, enteringEnter B107.
B106. synchronously complete, terminate.
B107. synchronization failure, terminates.
As shown in figure 5, synchronizing the flow chart of processing for the mode of eating dishes without rice or wine in the present embodiment, specific steps include：
C101. selecting module 4 extracts the neighboring BS information listened to.
C102. selecting module 4 sends the simultaneously operating request for carrying neighboring BS information to module 3 of eating dishes without rice or wine.
C103. module of eating dishes without rice or wine 3 is received after simultaneously operating request, and LTE is carried out by the mode of eating dishes without rice or wine according to current neighbor informationFemto access networks are synchronous.
Synchronization Status Message is fed back to selecting module 4 by module of C104. eating dishes without rice or wine 3.
C105. selecting module 4 checks synchronously whether succeed according to Synchronization Status Message, if so, into C106, if it is not, enteringEnter C107.
C106. synchronously complete, terminate.
C107. synchronization failure, terminates.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing fromOn the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present inventionWithin the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.