CN105657815A - Base station synchronizing method and device - Google Patents

Abstract

The embodiment of the invention discloses a base station synchronizing method and device, and relates to the technical field of wireless communication. The problem of how to effectively synchronize base stations based on a local IP access system is solved. In the scheme, a base station receives configuration information containing a synchronizing layer grade and sent by a gateway device; the base station sets the synchronous layer grade of itself according to the configuration information; if the synchronous layer grade of the base station is not the lowest synchronous layer grade, a synchronous source is determined and synchronized with the base station. It can be seen that through the scheme, the problem of how to synchronize base stations is solved.

Description

The method and apparatus of base station synchronization

Present patent application file is the applying date is 2012-05-29, and application number is 201210172058.5, and denomination of invention is the divisional application of the application for a patent for invention file of " method and apparatus of base station synchronization ".

Technical field

The present invention relates to wireless communication field, the method and apparatus particularly relating to a kind of base station synchronization.

Background technology

The data traffic requirement growing in order to meet user, a kind of base station IP based on Long Term Evolution (LongTermEvolve, LTE) system accesses system and arises at the historic moment. Base station IP accesses system by building Local wireless network, base station (AccessPoint is also called access point base station) equipment provide the user the network coverage and wirelessly access. Have employed the network architecture of flattening owing to base station IP accesses system, it can simply and cost effectively realize the subscriber equipment (UserEquipment, the UE) access to external network, as shown in Figure 1. This framework is based entirely on the framework of Access Network, eliminates the core net of LTE system, simplifies data transfer path and network complexity. This base station IP access architecture is also called LTE-Hi system.

Base station IP accesses system based on TD SDMA-Long Term Evolution (TD-SCDMALongTermEvolution, TD-LTE) technology, has followed the TD-LTE system requirement for synchronization among base stations. This is because adopt the time division duplex (TDDTimeDivisionDuplex of identical frequency in up-downgoing, TDD) in system, if it is asynchronous between each base station, the uplink that neighbor cell terminal sends can be transmitted reception to this cell downlink and bring interference, and only strict synchronization is just avoided that serious interference.

That the system that accesses to base station IP is comparatively similar is LTEFemto, i.e. LTE femtocell (HomeeNodeB, HeNB).

LTE femtocell mainly adopts following three kinds of simultaneous techniquess:

The first, global positioning system (GlobalPositioningSystems, GPS);

If HeNB is mounted with GPS, being obtained in that gps satellite synchronizing signal, GPS just can provide sync identification (100ns) accurately for it, but the use of GPS is limited to environment, almost cannot work particularly in indoor environment, and relatively costly.

The second, Institute of Electrical and Electronics Engineers (IEEEInstituteofElectricalandElectronicsEngineers, IEEE) 1588v2;

Under good back haul link network support (can be the fiber optic Ethernet of operator's laying), 1588v2 also is able to provide the synchronization accuracy of Microsecond grade, but all can there is high-quality back haul link support under not all scene, and cable and x Digital Subscriber Line road (Xdigitalsubscriberline, XDSL) also all there is the problem that time delay is unstable, synchronization accuracy can be produced considerable influence.

3rd, network monitoring;

Network monitoring scheme can work when GPS and 1588v2 scheme cannot use, and therefore for TD-LTEHeNB, this is a kind of requisite synchronization mechanism. Network monitoring mechanism refers to by receiving the method that the signal of synchronized network node (synchronisation source) obtains synchronization. After HeNB starts but forbid before there is no synchronization to launch, HeNB must first go through and just can carry out normal transmission after the signal monitoring synchronization node carries out Network Synchronization, and follow-up also will to being synchronously performed periodic maintenance. For HeNB, its synchronisation source can select synchronized macro base station (MeNB), and HeNB obtains timing by the synchronizing signal or reference marks receiving MeNB, as shown in Figure 2 a. But when macrocell network covers undesirable, or when HeNB is positioned at building depths, the synchronizing signal obtaining macro base station can be subject to certain impact, and the now synchronization of HeNB can be realized by the mode of multi-hop, namely by synchronizing with synchronized HeNB, as shown in Figure 2 b.

Multi-hop is synchronized, it is necessary to introduce layer, sync concept, layer, sync can be defined as the jumping figure of process between HeNB and the GPS source needing to synchronize, and the layer, sync grade of certain HeNB obtains the upper level source big 1 of synchronization than it. Such as, the layer, sync grade that layer, sync grade is 1, HeNB2 that layer, sync grade is 0, HeNB1 of the MeNB in Fig. 2 a and Fig. 2 b is 2.

3GPP discusses following three kinds of network monitoring mechanism:

First, based on the monitoring of master sync signal (PrimarySynchronizedSignal, PSS)/auxiliary synchronous signals (SecondarySynchronizationSignal, SSS). Under this mechanism, HeNB is undertaken synchronizing by the PSS/SSS of reception synchronization node, and period of mourning in silence follows the tracks of the PSS/SSS of HeNB and can not carry out normal transmission.

Second, based on the monitoring of multimedia broadcast multi-broadcasting business Single Frequency Network (MultimediaBroadcastmulticastserviceSingleFrequencyNetwor k, MBSFN) subframe. HeNB is by being claimed as MBSFN sub-frame subframe of mourning in silence, and UE then ignores this subframe when receiving. The method is all suitable for for single-hop and multi-hop synchronization mechanism, and under multiple jump condition, some subframe can be claimed as MBSFN sub-frame with certain cycle by the HeNB of each layer, and the MBSFN sub-frame position of the HeNB statement of different layers is different. Being limited to the configuration of maximum MBSFN sub-frame, maximum support 4 is jumped.

3rd, based on the monitoring of TDD special subframe configuration. By configuring less descending pilot frequency time slot (DwPTS) symbol to HeNB and configuring more DwPTS symbol to MeNB; so that HeNB can utilize it to protect the time of time slot (GP) to measure the exclusive pilot signal in the community (Cell-specificreferencesignals, CRS) of MeNB to obtain synchronization. But owing to general DwPTS equipping rules is to adopt more DwPTS symbol configuration for little covering high power capacity communities such as indoor, for outdoor positioning in the less DwPTS configuration of the wide community then symbolization covered, the configuration requirement of this synchronous method is then just contrary with the network configuration principle of DwPTS, therefore the network configuration of operator will be constituted a definite limitation, and this method generally can not support the Network Synchronization that 2 jumpings are above.

It is generally used for indoor and hot spot region based on the local IP system accessed, and be likely to adopt the high band different from LTE system, it is difficult to that as synchronisation source, macro base station is carried out network monitoring realize synchronizing, even if being based partially on the local IP base station (hereinafter referred LTE-Hi base station) accessing system to obtain absolute synchronization source, when LTE-Hi base station is densely deployed in indoor hot spot region, the maximum layer, sync number of plies of TD-LTE network monitoring mechanism regulation can not meet requirement.

To sum up, accessing the base station of system when indoor focus area intensive is disposed based on local IP, base station cannot obtain absolute synchronization source, or cannot obtain effective synchronisation source owing to the TD-LTE maximum synchronization number of plies is limited.

Summary of the invention

The embodiment of the present invention provides the method and apparatus of a kind of base station synchronization, for the problem solving how to carry out effectively synchronization based on the local IP base station accessing system.

A kind of method of base station synchronization, the method includes:

Base station receives the configuration information comprising layer, sync grade that gateway device sends;

Base station arranges the layer, sync grade of self according to described configuration information; If the layer, sync grade of this base station is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronization with this synchronisation source.

A kind of synchronizing information feedback method, the method includes:

Gateway device determines the layer, sync grade of base station;

The configuration information comprising described layer, sync grade is sent to base station by gateway device.

A kind of base station, this base station includes:

Receive unit, for receiving the configuration information comprising layer, sync grade that gateway device sends;

Lock unit, for arranging the layer, sync grade of self according to described configuration information; If the layer, sync grade of this base station is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronization with this synchronisation source.

A kind of gateway device, this gateway device includes:

Determine unit, for determining the layer, sync grade of base station;

Transmitting element, for being sent to base station by the configuration information comprising described layer, sync grade.

In the base station synchronization scheme that the embodiment of the present invention provides, base station receives the configuration information comprising layer, sync grade that gateway device sends, and arranges the layer, sync grade of self according to this configuration information; If the layer, sync grade of this base station is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronization with this synchronisation source. Visible, this programme indicates its layer, sync grade by gateway device to base station, and base station synchronizes according to the layer, sync grade of instruction, thus solving the problem how base station carries out synchronizing.

Accompanying drawing explanation

Fig. 1 is the configuration diagram that in prior art, base station IP accesses system;

Fig. 2 a and Fig. 2 b is network monitoring schematic diagram of mechanism in prior art;

The first base station synchronization method schematic flow sheet for base station side that Fig. 3 a provides for the embodiment of the present invention;

The first base station synchronization method schematic flow sheet for gateway device side that Fig. 3 b provides for the embodiment of the present invention;

The second base station synchronization method schematic flow sheet for base station side that Fig. 4 a provides for the embodiment of the present invention;

The second base station synchronization method schematic flow sheet for gateway device side that Fig. 4 b provides for the embodiment of the present invention;

The third base station synchronization method schematic flow sheet for base station side that Fig. 5 a provides for the embodiment of the present invention;

The third base station synchronization method schematic flow sheet for OAM side that Fig. 5 b provides for the embodiment of the present invention;

Fig. 6 a and Fig. 6 b is the schematic diagram carrying out layer, sync negotiation mechanism of AP and the GW in the embodiment of the present invention;

Fig. 6 c is the schematic diagram specifying AP layer, sync grade of the GW in the embodiment of the present invention;

Fig. 6 d is the schematic diagram of the AP request in the embodiment of the present invention, GW appointment AP layer, sync grade;

The GW that Fig. 6 e is in the embodiment of the present invention confirms, by adjacent base station, the schematic diagram that base station synchronization layer grade is arranged;

Fig. 6 f is the schematic diagram arranged by adjacent base station refusal base station synchronization layer grade of the GW in the embodiment of the present invention;

The structural representation of the first base station that Fig. 7 provides for the embodiment of the present invention;

The structural representation of the second base station that Fig. 8 provides for the embodiment of the present invention;

The structural representation of the third base station that Fig. 9 provides for the embodiment of the present invention;

The structural representation of the first gateway device that Figure 10 provides for the embodiment of the present invention;

The structural representation of the second gateway device that Figure 11 provides for the embodiment of the present invention;

The structural representation of the OAM equipment that Figure 12 provides for the embodiment of the present invention.

Detailed description of the invention

In order to solve how to carry out the problem of effectively synchronization based on the local IP base station accessing system, the embodiment of the present invention provides the method for the first base station synchronization.

Referring to Fig. 3 a, for base station side, the method for the first base station synchronization that the embodiment of the present invention provides, comprise the following steps:

Step 301: the layer, sync grade of this base station, after not searching effective synchronisation source, is set to minimum layer, sync grade, and determines whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station by base station; Here, do not search effective synchronisation source to refer to and do not search synchronisation source or the layer, sync grade of synchronisation source that searches reaches maximum layer, sync grade;

Step 302: if conflict, then reset the layer, sync grade of this base station, and select the adjacent base station conflicted as synchronisation source, it is achieved be synchronization with this synchronisation source;

Step 303: if not conflicting, then be fixed as minimum layer, sync grade by the layer, sync grade of this base station, so that adjacent base station carries out synchronize with this base station.

In step 301, it is determined that whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station, implements and can adopt one of the following two kinds method:

First, determine by searching for adjacent cell signal whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station;

Concrete, search adjacent cell signal within the first time setting duration, if not searching the signal of the co-frequency neighbor cell that layer, sync grade is minimum layer, sync grade, it is determined that the layer, sync grade of this base station is not conflicted with the layer, sync grade of adjacent base station;

If searching the signal of the co-frequency neighbor cell that layer, sync grade is minimum layer, sync grade, within the second time setting duration, then continue to monitor the signal of this co-frequency neighbor cell, if the layer, sync grade of this co-frequency neighbor cell is minimum layer, sync grade within the second time setting duration always, then determine that the layer, sync grade of this base station is conflicted with the layer, sync grade of the base station at this place, co-frequency neighbor cell, if the layer, sync grade of this co-frequency neighbor cell changes within the second time setting duration, then determine that the layer, sync grade of this base station is not conflicted with the layer, sync grade of adjacent base station.

Second, the information of the layer, sync grade of this base station is sent to gateway device; Feedback information according to gateway device determines whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station.

Concrete, if the feedback information of gateway device is confirmation, then determine that the layer, sync grade of this base station is not conflicted with the layer, sync grade of adjacent base station, if the feedback information of gateway device is refusal information, it is determined that the layer, sync grade of this base station is conflicted with the layer, sync grade of adjacent base station;

Described confirmation is the gateway device synchronization stratum information in all base stations according to storage and information of adjacent cells, it is determined that the information that the layer, sync grade of this base station sends after not conflicting with the layer, sync grade of adjacent base station; Described refusal information is the gateway device synchronization stratum information in all base stations according to storage and information of adjacent cells, it is determined that the information that the layer, sync grade of this base station sends after conflicting with the layer, sync grade of adjacent base station;Or,

Described confirmation is gateway device after the information of the layer, sync grade of this base station is sent to each adjacent base station, receives the confirmation replied adjacent base station or the information sent when setting the reply not receiving adjacent base station in duration; Described refusal information is gateway device after the information of the layer, sync grade of this base station is sent to adjacent base station, receives the information of transmission during the refusal information replied adjacent base station.

Accordingly, step 302 selects the adjacent base station of conflict as synchronisation source, implements and can adopt one of the following two kinds method:

First, when the refusal information received comprises the information of adjacent base station of conflict, select the adjacent base station indicated by this information as synchronisation source;

Second, search for adjacent cell signal, select the base station at the elementary adjacent cell place of layer, sync searched as synchronisation source.

In step 302, reset the layer, sync grade of this base station, implement and can be such that the layer, sync grade that the layer, sync grade of this base station is re-set as a grade higher than minimum layer, sync grade.

Such as Fig. 3 b, for gateway device side, the first synchronizing information feedback method that the embodiment of the present invention provides, comprise the following steps:

Step 311: gateway device receives the information of the layer, sync grade of this base station that base station sends;

Step 312: gateway device determines whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station, and according to determining that result returns feedback information to base station.

Implementing of step 312 can be such that

If gateway device is according to the synchronization stratum information (including layer, sync grade) of all base stations of storage and information of adjacent cells, it is determined that the layer, sync grade of this base station conflict with the layer, sync grade of adjacent base station, then to base station return confirmation; If the synchronization stratum information of all base stations according to storage and information of adjacent cells, it is determined that the layer, sync grade of this base station is conflicted with the layer, sync grade of adjacent base station, then return refusal information to base station; Or,

After the information of the layer, sync grade of this base station is sent to adjacent base station by gateway device, if receiving the confirmation replied adjacent base station or setting the reply not receiving adjacent base station in duration, then return confirmation to base station; If receiving the refusal information that adjacent base station is replied, then return refusal information to base station.

In order to solve how to carry out the problem of effectively synchronization based on the local IP base station accessing system, the embodiment of the present invention provides the method for the second base station synchronization.

Referring to Fig. 4 a, for base station side, the method for the second base station synchronization that the embodiment of the present invention provides, comprise the following steps:

Step 401: base station receives the configuration information comprising layer, sync grade that gateway device sends;

Step 402: base station arranges the layer, sync grade of self according to described configuration information, is set to the layer, sync grade in this configuration information by self layer, sync grade; If the layer, sync grade of this base station is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronization with this synchronisation source; If the layer, sync grade of this base station is minimum layer, sync grade, then adjacent base station can carry out synchronize with this base station.

In step 401, base station receives the configuration information comprising layer, sync grade that gateway device sends, and implements and can be such that

Base station, after being linked into network, receives the configuration information comprising layer, sync grade that gateway device sends; Or,

Base station, after not searching effective synchronisation source, sends synchronization level request message to gateway device;Receive the configuration information comprising layer, sync grade that gateway device returns.

The above-mentioned method determining synchronisation source can be such that

When the configuration information received also comprises information of adjacent cells, determine the base station at the elementary adjacent cell place of layer, sync according to this information of adjacent cells, it is to be determined to base station as synchronisation source; Here information of adjacent cells can include the information such as the layer, sync grade of adjacent cell; Or,

Search adjacent cell signal, selects the base station at the elementary adjacent cell place of layer, sync searched as synchronisation source.

It is also preferred that the left after base station receives described configuration information, base station receives the reconfiguration information that gateway device sends after network design changes, this reconfiguration information comprises the layer, sync grade after renewal; Base station resets the layer, sync grade of self according to this reconfiguration information, is set to the layer, sync grade in this reconfiguration information by self layer, sync grade; If the layer, sync grade of this base station is not minimum layer, sync grade after resetting, then redefines synchronisation source, and realize synchronization with the synchronisation source redefined.

Same, the above-mentioned method redefining synchronisation source can be such that

When the reconfiguration information received also comprises information of adjacent cells, determine the base station at the elementary adjacent cell place of layer, sync according to this information of adjacent cells, it is to be determined to base station as synchronisation source; Or,

Search adjacent cell signal, selects the base station at the elementary adjacent cell place of layer, sync searched as synchronisation source.

As shown in Figure 4 b, for gateway device side, the second synchronizing information feedback method that the embodiment of the present invention provides, comprise the following steps:

Step 411: gateway device determines the layer, sync grade of base station; Can being stored in gateway device by the layer, sync grade of base station in advance, gateway device determines the layer, sync grade of base station according to the information of storage;

Step 412: the configuration information comprising described layer, sync grade is sent to base station by gateway device.

In step 412, the configuration information comprising described layer, sync grade is sent to base station by gateway device, implements and can be such that

The configuration information comprising described layer, sync grade, after base station is linked into network, is sent to base station by gateway device; Or,

The configuration information comprising described layer, sync grade, after receiving the synchronization level request message sent when base station does not search effective synchronisation source, is sent to base station by gateway device.

It is also preferred that the left after the configuration information comprising layer, sync grade is sent to base station by gateway device, gateway device sends reconfiguration information after network design changes to base station, comprises the layer, sync grade after renewal in this reconfiguration information. Layer, sync grade after renewal is the layer, sync grade reset for base station after network design changes.

In order to solve how to carry out the problem of effectively synchronization based on the local IP base station accessing system, the embodiment of the present invention provides the method for the third base station synchronization.

Referring to Fig. 5 a, for base station side, the method for the third base station synchronization that the embodiment of the present invention provides, comprise the following steps:

Step 501: base station reports the positional information of this base station in the registration process to maintenance and management entity (OAM); Receive the configuration information of the OAM layer, sync class information comprising adjacent base station returned; This neighbour base station be OAM this base station determined according to the positional information of this base station each adjacent base station in the elementary adjacent base station of layer, sync;

Step 502: the base station layer, sync hierarchical search synchronisation source according to the adjacent base station in configuration information, and carry out synchronize with this synchronisation source, namely search comprises the signal of the adjacent cell of this layer, sync grade, using this adjacent cell as synchronisation source, and carries out synchronize with this synchronisation source.

It is also preferred that the left base station carry out with the synchronisation source searched synchronize after, it is possible to perform following steps:

If A success synchronization with this synchronisation source, then the synchronization of the information comprising this synchronisation source to OAM return successfully indicates;

If the synchronization failure of B and this synchronisation source, the synchronization failure instruction of the information comprising this synchronisation source is then returned to OAM, and receive the configuration information of the OAM layer, sync class information comprising the adjacent base station redefined returned to, layer, sync class information according to the adjacent base station redefined re-searches for synchronisation source, and carry out synchronize with the synchronisation source re-searched for, return step A.

It is also preferred that the left after step 501, base station receives the OAM configuration information resend after network design changes, this configuration information resend comprises the layer, sync class information of the adjacent base station redefined; Layer, sync class information according to the adjacent base station redefined re-searches for synchronisation source, and carries out synchronize with the synchronisation source re-searched for; If synchronizing successfully, then return to OAM and successfully indicate, and the layer, sync grade one-level higher than the layer, sync grade of the synchronisation source re-searched for resetting this base station; If synchronization failure, then keep current layer, sync grade, and send, to OAM, the instruction that layer, sync grade remains unchanged.

As shown in Figure 5 b, for OAM side, the method for the third base station synchronization that the embodiment of the present invention provides, comprise the following steps:

Step 511:OAM receives the positional information of this base station that base station reports in registration process;

Step 512:OAM determines the elementary adjacent base station of layer, sync in each adjacent base station of this base station according to the positional information of this base station, and the configuration information of the layer, sync class information comprising this neighbour base station is sent to this base station.

Further, after OAM sends configuration information to base station, if the synchronization that OAM receives the information comprising synchronisation source that base station sends successfully indicates, then successfully indicate the layer, sync grade determining and storing this base station according to this synchronization, the layer, sync grade of this base station is defined as the layer, sync grade of a grade higher than the layer, sync grade of this synchronisation source;

If receiving the synchronization failure instruction of the information comprising synchronisation source that base station sends, then OAM redefines an adjacent base station of this base station according to the positional information of this base station; And the configuration information of the layer, sync class information comprising the adjacent base station redefined is sent to this base station. Here, the adjacent base station redefined can be not selected mistake adjacent base station in the elementary adjacent base station of layer, sync, if being absent from the adjacent base station of not selected mistake, the adjacent base station then redefined can be this OAM, the layer, sync class information of this OAM could be arranged to sky, carry out synchronize and after returning confirmation of synchronization message with this OAM in base station, the layer, sync grade of base station is recorded as minimum layer, sync grade by OAM.

Preferably, after OAM sends configuration information to base station, OAM is after network design changes, positional information according to this base station redefines an adjacent base station of this base station, namely redefine the elementary adjacent base station of layer, sync in each adjacent base station, and the configuration information of the layer, sync class information comprising the adjacent base station redefined is sent to this base station. If the synchronization that follow-up OAM receives the information comprising synchronisation source that base station sends successfully indicates, then successfully indicate the layer, sync grade determining and storing this base station according to this synchronization, the layer, sync grade of this base station is defined as the layer, sync grade of a grade higher than the layer, sync grade of this synchronisation source.

Below in conjunction with specific embodiment, the present invention will be described:

The present invention proposes a kind of base station synchronization method accessing system based on local IP: coordinates by accessing self adaptation between system network nodes based on local IP, adjusts synchronisation source relation in network design, it is achieved effectively synchronize between base station.

Specifically include three kinds of situations:

Situation 1: base station distribution formula is automatically adjusted layer, sync grade.

Self frequency, when not having synchronisation source can use, is adjusted to the available frequency that distance adjacent cell frequency is farthest, and is customized for minimum layer, sync 0 by base station. Adjacent base station can synchronize and be set to more higher leveled layer, sync. When the statement of multiple adjacent base stations is for lowermost layer synchronisation source, it is necessary to introduce Hedging mechanism.

Hedging mechanism is: self layer, sync grade is set to 0 by base station 1, and the layer, sync searching for neighbor cell in time T0 is arranged, if T0 time-out is all without the co-frequency neighbor cell searching out layer, sync grade 0, self layer, sync grade is stabilized to 0 by base station 1; If the layer, sync grade searching out co-frequency cell 2 is 0, starting intervalometer T1, and persistently monitor community 2, if intervalometer T1 time-out community 2 layer, sync grade is still 0, self layer, sync is set to 1 by base station 1, and using base station, place, community 2 as synchronisation source. T0 is set greater than the value of base station measurement all adjacent cells layer, sync grade required time, and T1 is set greater than remeasuring the value of a cell synchronous layer grade required time, and T0 and T1 can be configured by OAM or base station is arranged voluntarily. For further collision free, T1 can be set to take arbitrary value an interval [Tmin, Tmax] by being uniformly distributed.

The layer, sync grade of situation 2:GW unified management adjacent base station;

Scheme one: GW stores synchronization stratum information and the information of adjacent cells of all base stations, when self layer, sync grade is determined in base station, send layer, sync grade to GW and determine request message, wherein comprise the layer, sync grade that base station selects voluntarily, GW is not if it is determined that base station selected layer, sync grade clashes with other adjacent base stations, to base station feedback confirmation, such as Fig. 6 a; Otherwise feed back refuse information and carry the layer, sync class information into base station configuration, such as Fig. 6 b.

Scheme two: GW directly configures layer, sync grade for base station;

GW stores base station synchronization layer class information and information of adjacent cells, as fig. 6 c, when after base station access network network, configuration information is sent to base station, including layer, sync grade, can also including the information of adjacent cells that need to synchronize, layer, sync grade is determined in base station, and determines synchronisation source according to the configuration received. When there being base station switch machine to make network design situation change, GW can send reconfiguration message to AP, to reconfigure the layer, sync class information etc. of AP. Or,

As shown in fig 6d, when after base station access network network, configuring request information is sent to GW, wherein can include desired layer, sync grade, GW sends configuration information to base station, including the layer, sync grade of configuration, it is also possible to include the information of adjacent cells that need to synchronize, layer, sync grade is determined in base station, and determines synchronisation source according to the configuration received. When there being base station switch machine to make network design situation change, GW can send reconfiguration message to AP, to reconfigure the layer, sync class information etc. of AP.

Scheme three: GW is collected layer, sync class information to adjacent base station and feeds back;

GW does not store the synchronization stratum information of base station, when, after base station selected layer, sync grade, sending layer, sync class information to GW;GW sends the inquiry of layer, sync grade to other base stations, if confirmation is not replied or reply in all adjacent base stations, GW is to this base station feedback confirmation, such as Fig. 6 e; If there being an adjacent base station reply refusal information and carry synchronization stratum information, GW forwards that information to this base station, such as Fig. 6 f. This base station adjusts layer, sync grade according to feedback information and determines synchronisation source according to adjacent cell layer, sync level status.

Adjacent base station judges that the foundation that feedback acknowledgment is still refused is whether that the layer, sync grade current with self is conflicted. Such as adjacent base station AP1 and AP2 is set to layer, sync grade 0, AP2 and by feedback refuse information and advises that AP1 is set to layer, sync grade 1.

Situation 3: configured base station synchronization layer grade by OAM;

Here OAM is network management unit (NetworkManager, NM), manages numerous AP below. OAM can store the positional information with its all AP registered and layer, sync grade thereof.

After one new AP start, the positional information of oneself is reported in OAM registration process, OAM is according to positional information, substantially determine adjacent base station (i.e. AP) information about, select the elementary adjacent base station of layer, sync in adjacent base station, and in configuration parameter, neighbour base station and layer, sync grade are sent to AP. AP determines synchronisation source according to the configuration information received and synchronizes. If synchronizing successfully, then returning to OAM and successfully indicate, OAM determines the layer, sync grade of this AP according to its instruction and stores; If synchronizing unsuccessful, returning and unsuccessfully indicating, OAM can continue to select other adjacent base stations as its synchronisation source according to positional information, and in configuration parameter, neighbour base station and layer, sync grade is sent to AP.

When there being base station switch machine to make network design situation change, it is possible to send configuration message to AP, to reconfigure the layer, sync grade of AP and adjacent base station information.

Embodiment one: base station is from Row sum-equal matrix layer, sync grade;

Step one: base station search synchronisation source, if searching synchronisation source, adds 1 by the layer, sync grade that the layer, sync grade of self is set to synchronisation source, synchronisation source carries out network monitoring to realize synchronizing, and layer, sync grade determines that process terminates. Without synchronisation source or there is no effective synchronisation source (the layer, sync grade of the synchronisation source not having effective synchronisation source to refer to search has been maxed out grade), perform step 2.

Step 2: working frequency points is arranged from adjacent cell frequency apart from farthest available frequency by base station, and the layer, sync grade arranging self is 0. Start intervalometer T0, the layer, sync grade of search adjacent cell, if T0 time-out is all without searching the adjacent cell that layer, sync grade is 0, perform step 4; If searching the adjacent cell that layer, sync grade is 0, perform step 3.

Step 3: starting intervalometer T1, detection layer, sync grade is the adjacent cell of 0, if this adjacent cell changes layer, sync grade during T1 time-out, then perform step 4, otherwise the synchronization level of self is set to 1, and with this adjacent cell for synchronisation source, terminates layer, sync grade and determine process.

Step 4: the layer, sync grade fixing this base station is 0.

Further illustrate for AP1, AP2. The T0 of AP1, AP2 is identical value by default configuration, and T1-AP1 and T1-AP2 takes random number by being uniformly distributed between [Tmin, Tmax].

AP1 and AP2 opens in adjacent position simultaneously, and all without effective synchronisation source. AP1, AP2 are simultaneously set to layer, sync grade 0 and each self-starting T0.AP1 finds AP2, and starting AP2 layer, sync grade during T1-AP1, T1-AP1 time-out is still 0, then AP1 layer, sync grade is set to 1. AP2 finds AP1, starts T1-AP2, and period detects that AP1 layer, sync grade changes to 1, terminates T1-AP2, and maintaining layer, sync grade is 0.

Embodiment two: layer, sync grade is consulted with GW in base station;

Step one: base station search synchronisation source, if searching synchronisation source, adds 1 by the layer, sync grade that the layer, sync grade of self is set to synchronisation source, synchronisation source carries out network monitoring to realize synchronizing, and layer, sync grade determines that process terminates. Without synchronisation source or there is no effective synchronisation source (the layer, sync grade of the synchronisation source not having effective synchronisation source to refer to search has been maxed out grade), perform step 2.

Step 2: working frequency points is arranged from adjacent cell frequency apart from farthest available frequency by base station, and the layer, sync grade arranging self is 0. Send base station configuration information to GW, wherein comprise layer, sync class information.

Step 3: GW receives the base station configuration information that base station sends, according to the base station synchronization layer class information of GW storage and information of adjacent cells, it is determined that base station whether can as layer, sync grade 0, if it is then reply confirmation; If the layer, sync grade having another adjacent cell is 0, then replys refusal information, and layer, sync grade is set to 1 by suggestion base station alternatively.

Step 4: base station receives the feedback information of GW, it is determined that layer, sync grade. If this base station synchronization layer grade is set to 1, determine synchronisation source according to adjacent cell layer, sync level condition.

Embodiment three: GW specific base layer, sync grade (GW directly specifies);

Network has just been accessed in base station:

Step one: after base station completes access procedure, GW determines has new base station to access, and sends base station configuration information to base station, wherein comprises the layer, sync class information of base station, it is also possible to include the information of adjacent cells that need to synchronize;

Step 2: base station receives the GW base station configuration information sent, and configures the layer, sync grade of self according to layer, sync class information therein, and monitors adjacent cell layer, sync grade to determine synchronisation source.

Or,

Network design situation changes:

Step one: network design changes, GW determines the layer, sync grade needing to change base station, to transmission base station, base station reconfiguration information, wherein comprises the layer, sync class information of base station, it is also possible to comprise the information of adjacent cells that need to synchronize;

Step 2: base station receives the GW base station reconfiguration information sent, and configures the layer, sync grade of self according to layer, sync class information therein, and monitors adjacent cell layer, sync grade to determine synchronisation source.

Embodiment four: GW specific base layer, sync grade (AP asks, and GW directly specifies);

Step one: base station search synchronisation source, if searching synchronisation source, adds 1 by the layer, sync grade that the layer, sync grade of self is set to synchronisation source, synchronisation source carries out network monitoring to realize synchronizing, and layer, sync grade determines that process terminates. Without synchronisation source or there is no effective synchronisation source (the layer, sync grade of the synchronisation source not having effective synchronisation source to refer to search has been maxed out grade), perform step 2.

Step 2: send base station synchronization layer rating request information to GW, wherein includes the layer, sync grade (differ and be decided to be 0) of base station suggestion alternatively.

Step 3: GW determines the layer, sync grade of base station, sends base station configuration information to base station, wherein comprises the layer, sync class information of base station;

Step 4: base station receives the GW base station configuration information sent, configures self layer, sync grade according to layer, sync class information therein, and monitors the layer, sync grade of adjacent cell to determine synchronisation source.

Embodiment five: GW collects feedback to adjacent base station;

Step one: synchronisation source is searched in base station 1, if searching synchronisation source, adds 1 by the layer, sync grade that the layer, sync grade of self is set to synchronisation source, synchronisation source carries out network monitoring and realizes synchronizing, and layer, sync grade determines that process terminates. Without synchronisation source or there is no effective synchronisation source (adjacent cell synchronisation source grade has been maxed out grade not to have effective synchronisation source to refer to), perform step 2.

Step 2: base station 1 sends base station configuration information to GW, wherein comprises layer, sync class information.

Step 3: GW, to the base station configuration information of other transmission base stations, base station 1, wherein comprises layer, sync class information. If other base stations reply confirmation or GW do not receive the feedback of other base stations in time span T1, then perform step 4; If there being a base station reply refusal information, and carry the layer, sync grade of suggestion alternatively, then perform step 5.

Step 4: GW sends to base station 1 and determines information.

Step 5: GW sends refusal information to base station 1, and sends the layer, sync grade configuration of suggestion.

Step 6: layer, sync grade is determined in base station, determines synchronisation source as required.

Embodiment six: OAM is each base station separate configurations layer, sync grade;

AP has just accessed network:

After step one: AP start, the positional information of oneself is reported in OAM registration process, OAM is according to positional information, substantially determine adjacent base station (i.e. AP) information about, select the elementary adjacent base station of layer, sync in adjacent base station, in configuration parameter, selected adjacent base station and layer, sync class information thereof are sent to AP.

Step 2: AP receives the OAM base station configuration information sent, and monitors adjacent cell layer, sync grade to determine synchronisation source.

If synchronizing successfully, then returning to OAM and successfully indicate, OAM confirms the layer, sync grade (the layer, sync grade+1 of synchronisation source) of current AP according to this instruction and stores; If synchronizing unsuccessful, then OAM continues according to positional information, the adjacent collection of base stations of not selected mistake selects the elementary adjacent base station of layer, sync, and in configuration parameter, selected adjacent base station and layer, sync class information thereof are sent to AP, AP then repeats step 2, until choosing suitable synchronisation source.

If still without suitable synchronisation source after attempting all adjacent base stations, then selected base station is set to oneself by OAM in configuration information, and layer, sync class information is set to sky, is sent to AP. AP returns after confirming message, and the layer, sync grade of this AP is designated as 0 by OAM.

Or,

Network design situation changes:

Step one: network design changes, OAM determines the layer, sync grade and positional information that change AP, it is determined that needs the AP occurring to change synchronization level, and sends configuration information to these AP, wherein comprises AP layer, sync class information;

Step 2: AP receives the GW configuration information sent, and attempts monitoring adjacent cell layer, sync grade according to layer, sync class information therein and determines synchronisation source.

If synchronizing successfully, then returning to OAM and successfully indicate, OAM confirms the layer, sync grade (the layer, sync grade+1 of synchronisation source) of current AP according to this instruction and stores; If unsuccessful, AP still keeps original synchronization level and sends, to OAM, the instruction that remains unchanged.

Referring to Fig. 7, the embodiment of the present invention provides a kind of base station, and this base station includes:

Unit 70 is set, for, after not searching effective synchronisation source, the layer, sync grade of this base station being set to minimum layer, sync grade;

Determining unit 71, whether the layer, sync grade for determining this base station conflicts with the layer, sync grade of adjacent base station;

First processing unit 72, for described determine that unit determines conflict time, reset the layer, sync grade of this base station, and select the adjacent base station of conflict as synchronisation source, it is achieved be synchronization with this synchronisation source;

Second processing unit 73, for described determine unit determine do not conflict time, the layer, sync grade of this base station is fixed as minimum layer, sync grade, so that adjacent base station carries out synchronize with this base station.

Further, described determine unit 71 for:

Determine by searching for adjacent cell signal whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station; Or,

The information of the layer, sync grade of this base station is sent to gateway device; Feedback information according to gateway device determines whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station.

Further, described determine unit 71 for:

Search adjacent cell signal within the first time setting duration, if not searching the signal of the co-frequency neighbor cell that layer, sync grade is minimum layer, sync grade, it is determined that the layer, sync grade of this base station is not conflicted with the layer, sync grade of adjacent base station;

If searching the signal of the co-frequency neighbor cell that layer, sync grade is minimum layer, sync grade, within the second time setting duration, then continue to monitor the signal of this co-frequency neighbor cell, if the layer, sync grade of this co-frequency neighbor cell is minimum layer, sync grade within the second time setting duration always, then determine that the layer, sync grade of this base station is conflicted with the layer, sync grade of the base station at this place, co-frequency neighbor cell, if the layer, sync grade of this co-frequency neighbor cell changes within the second time setting duration, then determine that the layer, sync grade of this base station is not conflicted with the layer, sync grade of adjacent base station.

Further, described determine unit 71 for:

If the feedback information of gateway device is confirmation, then determine that the layer, sync grade of this base station is not conflicted with the layer, sync grade of adjacent base station, if the feedback information of gateway device is refusal information, it is determined that the layer, sync grade of this base station is conflicted with the layer, sync grade of adjacent base station;

Described confirmation is the gateway device synchronization stratum information in all base stations according to storage and information of adjacent cells, it is determined that the information that the layer, sync grade of this base station sends after not conflicting with the layer, sync grade of adjacent base station; Described refusal information is the gateway device synchronization stratum information in all base stations according to storage and information of adjacent cells, it is determined that the information that the layer, sync grade of this base station sends after conflicting with the layer, sync grade of adjacent base station; Or,

Described confirmation is gateway device after the information of the layer, sync grade of this base station is sent to adjacent base station, receives the confirmation replied adjacent base station or the information sent when setting the reply not receiving adjacent base station in duration; Described refusal information is gateway device after the information of the layer, sync grade of this base station is sent to adjacent base station, receives the information of transmission during the refusal information replied adjacent base station.

Further, described first processing unit 72 is used for:

When described refusal information comprises the information of adjacent base station of conflict, select the adjacent base station indicated by this information as synchronisation source; Or,

Search adjacent cell signal, selects the base station at the elementary adjacent cell place of layer, sync searched as synchronisation source.

Further, described first processing unit 72 is used for:

The layer, sync grade of this base station is re-set as the layer, sync grade of a grade higher than minimum layer, sync grade.

Referring to Fig. 8, the embodiment of the present invention provides a kind of base station, and this base station includes:

Receive unit 80, for receiving the configuration information comprising layer, sync grade that gateway device sends;

Lock unit 81, for arranging the layer, sync grade of self according to described configuration information; If the layer, sync grade of this base station is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronization with this synchronisation source.

Further, described reception unit 80 is used for:

After base station is linked into network, receive the configuration information comprising layer, sync grade that gateway device sends; Or,

After not searching effective synchronisation source, send synchronization level request message to gateway device; Receive the configuration information comprising layer, sync grade that gateway device returns.

Further, this base station also includes:

Updating block 82, for receiving the reconfiguration information that gateway device sends after network design changes, comprises the layer, sync grade after renewal in this reconfiguration information;

The layer, sync grade of self is reset according to described reconfiguration information; If the layer, sync grade of this base station is not minimum layer, sync grade after resetting, then redefines synchronisation source, and realize synchronization with this synchronisation source.

Further, described lock unit 81 is used for:

When described configuration information also comprises information of adjacent cells, determine the base station at the elementary adjacent cell place of layer, sync according to this information of adjacent cells, it is to be determined to base station as synchronisation source; Or,

Search adjacent cell signal, selects the base station at the elementary adjacent cell place of layer, sync searched as synchronisation source.

Referring to Fig. 9, the embodiment of the present invention provides a kind of base station, and this base station includes:

Report unit 90, for reporting the positional information of this base station in the registration process to maintenance and management entity OAM;

Receive unit 91, for receiving the configuration information of the OAM layer, sync class information comprising adjacent base station returned; Described adjacent base station is the elementary adjacent base station of layer, sync of OAM this base station determined according to the positional information of this base station;

Lock unit 92, for the layer, sync class information search synchronisation source according to described adjacent base station, and carries out synchronize with this synchronisation source.

Further, this base station farther includes:

Indicating member 93, for when with the synchronization success of this synchronisation source, the synchronization returning the information comprising described synchronisation source to OAM successfully indicates;

When with the synchronization failure of this synchronisation source, the synchronization failure instruction of the information comprising described synchronisation source is returned to OAM, and receive the configuration information of the OAM layer, sync class information comprising the adjacent base station redefined returned to, layer, sync class information according to the adjacent base station redefined re-searches for synchronisation source, and carries out synchronize with the synchronisation source re-searched for.

Further, this base station farther includes:

Updating block 94, for receiving the OAM configuration information resend after network design changes, comprises the layer, sync class information of the adjacent base station redefined in this configuration information resend; Layer, sync class information according to the adjacent base station redefined re-searches for synchronisation source, and carries out synchronize with the synchronisation source re-searched for;

If synchronizing successfully, then return to OAM and successfully indicate, and the layer, sync grade one-level higher than the layer, sync grade of the synchronisation source re-searched for resetting this base station; If synchronization failure, then keep current layer, sync grade, and send, to OAM, the instruction that layer, sync grade remains unchanged.

Referring to Figure 10, the embodiment of the present invention provides a kind of gateway device, and this gateway device includes:

Receive unit 101, for receiving the information of the layer, sync grade of this base station that base station sends;

Feedback unit 102, whether the layer, sync grade for determining this base station conflicts with the layer, sync grade of adjacent base station, and according to determining that result returns feedback information to base station.

Further, described feedback unit 102 is used for:

If the synchronization stratum information of all base stations according to storage and information of adjacent cells, it is determined that the layer, sync grade of this base station is not conflicted with the layer, sync grade of adjacent base station, then return confirmation to base station; If the synchronization stratum information of all base stations according to storage and information of adjacent cells, it is determined that the layer, sync grade of this base station is conflicted with the layer, sync grade of adjacent base station, then return refusal information to base station; Or,

After the information of the layer, sync grade of this base station is sent to adjacent base station, if receiving the confirmation replied adjacent base station or setting the reply not receiving adjacent base station in duration, then return confirmation to base station; If receiving the refusal information that adjacent base station is replied, then return refusal information to base station.

Referring to Figure 11, the embodiment of the present invention provides a kind of gateway device, and this gateway device includes:

Determine unit 111, for determining the layer, sync grade of base station;

Transmitting element 112, for being sent to base station by the configuration information comprising described layer, sync grade.

Further, described transmitting element 112 is used for:

After base station is linked into network, the configuration information comprising described layer, sync grade is sent to base station; Or,

After receiving the synchronization level request message sent when base station does not search effective synchronisation source, the configuration information comprising described layer, sync grade is sent to base station.

Further, this gateway device also includes:

Reconfigure unit 113, for sending reconfiguration information after network design changes to base station, this reconfiguration information comprises the layer, sync grade after renewal.

Referring to Figure 12, the embodiment of the present invention provides a kind of maintenance and management entity OAM, and this OAM includes:

Receive unit 121, for receiving the positional information of this base station that base station reports in registration process;

Dispensing unit 122, the elementary adjacent base station of layer, sync for determining this base station according to the positional information of this base station, and the configuration information of the layer, sync class information comprising this neighbour base station is sent to this base station.

Further, this OAM also includes:

Processing unit 123, during for successfully indicating in the synchronization receiving the information comprising synchronisation source that base station sends, successfully indicates the layer, sync grade determining and storing this base station according to this synchronization;

When the synchronization failure instruction receiving the information comprising synchronisation source that base station sends, positional information according to this base station redefines an adjacent base station of this base station, and the configuration information of the layer, sync class information comprising the adjacent base station redefined is sent to this base station.

Further, this OAM also includes:

Reconfigure unit 124, for, after network design changes, redefining an adjacent base station of this base station according to the positional information of this base station, and the configuration information of the layer, sync class information comprising the adjacent base station redefined is sent to this base station.

To sum up, the beneficial effect comprise that

In the first base station synchronization scheme that the embodiment of the present invention provides, base station is not after searching effective synchronisation source, the layer, sync grade of this base station is set to minimum layer, sync grade, and determines whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station;If conflict, then reset the layer, sync grade of this base station, and select the adjacent base station conflicted as synchronisation source, it is achieved be synchronization with this synchronisation source; If not conflicting, then the layer, sync grade of this base station is fixed as minimum layer, sync grade, so that adjacent base station carries out synchronize with this base station, it is seen that, this programme is automatically adjusted layer, sync grade by base station distribution formula, solves the problem how base station carries out synchronizing when not searching effective synchronisation source.

In the second base station synchronization scheme that the embodiment of the present invention provides, base station receives the configuration information comprising layer, sync grade that gateway device sends, and arranges the layer, sync grade of self according to this configuration information; If the layer, sync grade of this base station is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronization with this synchronisation source. Visible, this programme indicates its layer, sync grade by gateway device to base station, and base station synchronizes according to the layer, sync grade of instruction, thus solving the problem how base station carries out synchronizing.

In the third base station synchronization scheme that the embodiment of the present invention provides, base station reports the positional information of this base station in the registration process of OAM, receive the configuration information of the OAM layer, sync class information comprising adjacent base station returned, layer, sync class information search synchronisation source according to this neighbour base station, and carry out synchronize with this synchronisation source. Visible, this programme by OAM to base station indicate synchronisation source layer, sync grade, base station according to instruction layer, sync hierarchical search synchronisation source to synchronize, thus solving the problem how base station carries out synchronizing.

The present invention is that flow chart and/or block diagram with reference to method according to embodiments of the present invention, equipment (system) and computer program describe. It should be understood that can by the combination of the flow process in each flow process in computer program instructions flowchart and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame. These computer program instructions can be provided to produce a machine to the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device so that the instruction performed by the processor of computer or other programmable data processing device is produced for realizing the device of function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions may be alternatively stored in and can guide in the computer-readable memory that computer or other programmable data processing device work in a specific way, the instruction making to be stored in this computer-readable memory produces to include the manufacture of command device, and this command device realizes the function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices provides for realizing the step of function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.

Although preferred embodiments of the present invention have been described, but those skilled in the art are once know basic creative concept, then these embodiments can be made other change and amendment. So, claims are intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.

Obviously, the present invention can be carried out various change and modification without deviating from the spirit and scope of the present invention by those skilled in the art.So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (14)

1. the method for a base station synchronization, it is characterised in that the method includes:

Base station receives the configuration information comprising layer, sync grade that gateway device sends;

Base station arranges the layer, sync grade of self according to described configuration information; If the layer, sync grade of this base station is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronization with this synchronisation source.

2. the method for claim 1, it is characterised in that described base station receives the configuration information comprising layer, sync grade that gateway device sends, and specifically includes:

Base station, after being linked into network, receives the configuration information comprising layer, sync grade that gateway device sends; Or,

Base station, after not searching effective synchronisation source, sends synchronization level request message to gateway device; Receive the configuration information comprising layer, sync grade that gateway device returns.

3. method as claimed in claim 1 or 2, it is characterised in that after base station receives described configuration information, farther include:

Base station receives the reconfiguration information that gateway device sends after network design changes, and comprises the layer, sync grade after renewal in this reconfiguration information;

Base station resets the layer, sync grade of self according to described reconfiguration information; If the layer, sync grade of this base station is not minimum layer, sync grade after resetting, then redefines synchronisation source, and realize synchronization with this synchronisation source.

4. method as claimed in claim 1 or 2, it is characterised in that described determine synchronisation source, specifically includes:

When described configuration information also comprises information of adjacent cells, determine the base station at the elementary adjacent cell place of layer, sync according to this information of adjacent cells, it is to be determined to base station as synchronisation source; Or,

Search adjacent cell signal, selects the base station at the elementary adjacent cell place of layer, sync searched as synchronisation source.

5. a synchronizing information feedback method, it is characterised in that the method includes:

Gateway device determines the layer, sync grade of base station;

The configuration information comprising described layer, sync grade is sent to base station by gateway device.

6. method as claimed in claim 5, it is characterised in that the configuration information comprising described layer, sync grade is sent to base station by described gateway device, specifically includes:

The configuration information comprising described layer, sync grade, after base station is linked into network, is sent to base station by gateway device; Or,

The configuration information comprising described layer, sync grade, after receiving the synchronization level request message sent when base station does not search effective synchronisation source, is sent to base station by gateway device.

7. the method as described in claim 5 or 6, it is characterised in that after the configuration information comprising described layer, sync grade is sent to base station by gateway device, farther include:

Gateway device sends reconfiguration information after network design changes to base station, comprises the layer, sync grade after renewal in this reconfiguration information.

8. a base station, it is characterised in that this base station includes:

Receive unit, for receiving the configuration information comprising layer, sync grade that gateway device sends;

Lock unit, for arranging the layer, sync grade of self according to described configuration information; If the layer, sync grade of this base station is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronization with this synchronisation source.

9. base station as claimed in claim 8, it is characterised in that described reception unit is used for:

After base station is linked into network, receive the configuration information comprising layer, sync grade that gateway device sends;Or,

After not searching effective synchronisation source, send synchronization level request message to gateway device; Receive the configuration information comprising layer, sync grade that gateway device returns.

10. base station as claimed in claim 8 or 9, it is characterised in that this base station also includes:

Updating block, for receiving the reconfiguration information that gateway device sends after network design changes, comprises the layer, sync grade after renewal in this reconfiguration information;

The layer, sync grade of self is reset according to described reconfiguration information; If the layer, sync grade of this base station is not minimum layer, sync grade after resetting, then redefines synchronisation source, and realize synchronization with this synchronisation source.

11. base station as claimed in claim 8 or 9, it is characterised in that described lock unit is used for:

When described configuration information also comprises information of adjacent cells, determine the base station at the elementary adjacent cell place of layer, sync according to this information of adjacent cells, it is to be determined to base station as synchronisation source; Or,

Search adjacent cell signal, selects the base station at the elementary adjacent cell place of layer, sync searched as synchronisation source.

12. a gateway device, it is characterised in that this gateway device includes:

Determine unit, for determining the layer, sync grade of base station;

Transmitting element, for being sent to base station by the configuration information comprising described layer, sync grade.

13. gateway device as claimed in claim 12, it is characterised in that described transmitting element is used for:

After base station is linked into network, the configuration information comprising described layer, sync grade is sent to base station; Or,

After receiving the synchronization level request message sent when base station does not search effective synchronisation source, the configuration information comprising described layer, sync grade is sent to base station.

14. the gateway device as described in claim 12 or 13, it is characterised in that this gateway device also includes:

Reconfigure unit, for sending reconfiguration information after network design changes to base station, this reconfiguration information comprises the layer, sync grade after renewal.