CN105657814A

CN105657814A - Base station synchronizing method and device

Info

Publication number: CN105657814A
Application number: CN201610179812.6A
Authority: CN
Inventors: 谌丽; 秦飞; 傅婧
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2012-05-29
Filing date: 2012-05-29
Publication date: 2016-06-08
Anticipated expiration: 2032-05-29
Also published as: CN105657814B

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 sets the synchronous layer grade of itself as the lowest synchronous layer grade and determines whether the synchronous layer grade of the base station conflicts with the synchronous layer grade of a neighboring base station or not when not finding an effective synchronous source; if yes, the synchronous layer grade of the base station is reset, and the conflicting neighboring base station is selected as the synchronous source and synchronized with the base station; if not, the synchronous layer grade of the base station is fixed as the lowest synchronous layer grade, and the neighboring base station is synchronized with the base station. It can be seen that through the scheme, the problem of how to synchronize base stations when an effective synchronous source is not found is solved.

Description

The method that base station is synchronous and equipment

Patent application document of the present invention is the applying date is 2012-05-29, and application number is 201210172058.5, and denomination of invention is point case application of the application for a patent for invention file of " method that base station is synchronous and equipment ".

Technical field

The present invention relates to wireless communication field, particularly relate to a kind of synchronous method in base station and equipment.

Background technology

In order to meet the growing data traffic requirement of user, a kind of base station IP connecting system based on long-term evolution (LongTermEvolve, LTE) system arises at the historic moment. Base station IP connecting system, by building Local wireless network, is provided the network coverage and wireless access service by base station (AccessPoint is also called access point base station) equipment for user. Owing to base station IP connecting system have employed the network architecture of flattening, it can simply and at low cost realize user equipment (UserEquipment, UE) to the access of outside network, as shown in Figure 1. This kind of framework is the complete framework based on connecting network, eliminates the core net of LTE system, simplifies data transfer path and network complexity. This kind of base station IP access architecture is also called LTE-Hi system.

Base station IP connecting system, based on the many locations of time division synchronous code division-long-term evolution (TD-SCDMALongTermEvolution, TD-LTE) technology, has followed the requirement of TD-LTE system 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 synchronously just can avoid serious interference.

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

LTE femtocell mainly adopts following three kinds of synchronous technology:

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

If HeNB has installed GPS, can obtaining gps satellite synchronizing signal, GPS just can provide sync identification (100ns) accurately for it, but the use of GPS is limited to environment, especially almost cannot work in indoor environment, and cost is higher.

Two, Electrical and Electronic society of engineers (IEEEInstituteofElectricalandElectronicsEngineers, IEEE) 1588v2;

Under good backhaul chain road network supports (can be the optical fiber Ethernet that operator lays), 1588v2 also can provide the synchronization accuracy of Microsecond grade, but all can there is high-quality backhaul link support under not all scene, and cable and x digital subscriber line (Xdigitalsubscriberline, XDSL) also all there is the problem of time delay instability, synchronization accuracy can be produced bigger impact.

Three, network monitoring;

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

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

3GPP discusses following three kinds of network monitoring mechanism:

The first, based on the monitoring of master sync signal (PrimarySynchronizedSignal, PSS)/auxiliary synchronous signals (SecondarySynchronizationSignal, SSS). Under this kind of mechanism, to be that the PSS/SSS by receiving synchronous node carries out synchronous for HeNB, and the PSS/SSS following the tracks of HeNB between quiet period can not carry out normal transmission.

2nd, 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. Synchronously mechanism is all applicable for single-hop and multi-hop for the method, 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 configure more DwPTS symbol to MeNB; so that the exclusive pilot signal (Cell-specificreferencesignals, CRS) in community that when HeNB can utilize it to protect, the time of gap (GP) measures MeNB is synchronous to obtain. But it is that more DwPTS symbol configuration is adopted for little covering heavy body communities such as indoor due to general DwPTS equipping rules, for the DwPTS configuration that outdoor positioning then adopts symbol less in the wide community covered, the configuration requirement of this synchronous method is then just contrary with the network configuration principle of DwPTS, therefore a definite limitation is formed by the network configuration of operator, and this kind of method generally can not support the Network Synchronization that 2 jumpings are above.

System based on local IP access is generally used for indoor and hot spot region, and probably adopt the high band different from LTE system, being difficult to that as synchronisation source, grand base station is carried out network monitoring realizes synchronous, even if part obtains absolute synchronization source based on the base station (hereinafter referred LTE-Hi base station) of local IP connecting system, 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, based on the base station of local IP connecting system when indoor hot spot region dense deployment, base station cannot obtain absolute synchronization source, or cannot obtain effective synchronisation source owing to the maximum synchronous number of plies of TD-LTE is limited.

Summary of the invention

How a kind of method that the embodiment of the present invention provides base station synchronous and equipment, carry out effectively synchronous problem for solving the base station based on local IP connecting system.

The method that base station is synchronous, the method comprises:

The layer, sync grade of this base station, after not searching effective synchronisation source, is set to minimum layer, sync grade by base station, and whether the layer, sync grade determining this base station conflicts with the layer, sync grade of adjacent base station;

If conflict, then the layer, sync grade of this base station is set again, and selects the adjacent base station of conflict as synchronisation source, it is achieved be synchronous 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 synchronous with this base station.

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

Gateway equipment receives the information of the layer, sync grade of this base station that base station sends;

Gateway equipment determines whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station, and returns feedback information according to determination result to base station.

A kind of base station, this base station comprises:

Setting unit, for, after not searching effective synchronisation source, being set to minimum layer, sync grade by the layer, sync grade of this base station;

Whether determining unit, conflict with the layer, sync grade of adjacent base station for determining the layer, sync grade of this base station;

First processing unit, for when described determining unit determines conflict, again arranging the layer, sync grade of this base station, and selects the adjacent base station of conflict as synchronisation source, it is achieved synchronous with this synchronisation source;

2nd processing unit, for when described determining unit is determined not conflict, being fixed as minimum layer, sync grade by the layer, sync grade of this base station, so that adjacent base station carries out synchronous with this base station.

A kind of gateway equipment, this gateway equipment comprises:

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

Whether feedback unit, conflict with the layer, sync grade of adjacent base station for determining the layer, sync grade of this base station, and return feedback information according to determination result to base station.

In the synchronous scheme in base station that the embodiment of the present invention provides, the layer, sync grade of this base station, after not searching effective synchronisation source, is set to minimum layer, sync grade by base station, and whether the layer, sync grade determining this base station conflicts with the layer, sync grade of adjacent base station; If conflict, then the layer, sync grade of this base station is set again, and selects the adjacent base station of conflict as synchronisation source, it is achieved be synchronous 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 synchronous with this base station, it is seen that, this scheme regulates layer, sync grade automatically by base station distribution formula, solves how base station carries out synchronous problem when not searching effective synchronisation source.

Accompanying drawing explanation

Fig. 1 is the configuration diagram of IP connecting system in base station in prior art;

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 equipment side that Fig. 3 b provides for the embodiment of the present invention;

The 2nd kind of base station synchronization method schematic flow sheet for base station side that Fig. 4 a provides for the embodiment of the present invention;

The 2nd kind of base station synchronization method schematic flow sheet for gateway equipment 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 that AP and the GW in the embodiment of the present invention carries out layer, sync consultation mechanism;

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

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

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

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

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

The structural representation of the 2nd kind of 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 the gateway equipment that Figure 10 provides for the embodiment of the present invention;

The structural representation of the 2nd kind of gateway equipment 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.

Embodiment

How effectively synchronous problem is carried out, the method that the embodiment of the present invention provides the first base station synchronous in order to solve the base station based on local IP connecting system.

See Fig. 3 a, for base station side, the method that the first base station that the embodiment of the present invention provides is synchronous, comprises 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 by base station, and whether the layer, sync grade determining this base station conflicts with the layer, sync grade of adjacent 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 the layer, sync grade of this base station is set again, and select the adjacent base station of conflict as synchronisation source, it is achieved synchronous 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 synchronous 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, and specific implementation can adopt one of the following two kinds method:

The first, determine whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station by search adjacent cell signal;

Concrete, searching for adjacent cell signal when the first setting in the time of length, if not searching the signal that layer, sync grade is the co-frequency neighbor cell of minimum layer, sync grade, then determining 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 that layer, sync grade is the co-frequency neighbor cell of minimum layer, sync grade, then the 2nd setting time length time in continue monitor this co-frequency neighbor cell signal, if in the time of length, the layer, sync grade of this co-frequency neighbor cell is minimum layer, sync grade when the 2nd setting 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 in the time of length, the layer, sync grade of this co-frequency neighbor cell changes when the 2nd setting, then determine that the layer, sync grade of this base station is not conflicted with the layer, sync grade of adjacent base station.

2nd, the information of the layer, sync grade of this base station is sent to gateway equipment; Feedback information according to gateway equipment 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 equipment 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 equipment is exclude information, then determine that the layer, sync grade of this base station is conflicted with the layer, sync grade of adjacent base station;

Described confirmation is that gateway equipment is at the synchronization stratum information according to all base stations stored 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 exclude information is that gateway equipment is at the synchronization stratum information according to all base stations stored 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 equipment after the information of the layer, sync grade of this base station is sent to each adjacent base station, the information sent when receiving the confirmation replied adjacent base station or do not receive the reply of adjacent base station when setting in length; Described exclude information is gateway equipment after the information of the layer, sync grade of this base station is sent to adjacent base station, the information sent when receiving the exclude information replied adjacent base station.

Accordingly, selecting the adjacent base station of conflict as synchronisation source in step 302, specific implementation can adopt one of the following two kinds method:

The first, when the exclude information received comprises the information of adjacent base station of conflict, select the adjacent base station indicated by this information as synchronisation source;

2nd, search adjacent cell signal, selects the base station at the adjacent cell place that the layer, sync grade searched is minimum as synchronisation source.

In step 302, again arranging the layer, sync grade of this base station, specific implementation can be as follows: 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 equipment side, the first synchronizing information feedback method that the embodiment of the present invention provides, comprises the following steps:

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

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

The specific implementation of step 312 can be as follows:

If gateway equipment is according to the synchronization stratum information (comprising layer, sync grade) of all base stations stored and information of adjacent cells, it is determined that the layer, sync grade of this base station not layer, sync grade with adjacent base station conflict, then return confirmation to base station; If the synchronization stratum information according to all base stations stored 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 exclude 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 equipment, if receiving the confirmation replied adjacent base station or not receiving the reply of adjacent base station when setting in length, then return confirmation to base station; If receiving the exclude information that adjacent base station is replied, then return exclude information to base station.

How carrying out effectively synchronous problem to solve the base station based on local IP connecting system, the embodiment of the present invention provides the 2nd kind of method that base station is synchronous.

See Fig. 4 a, for base station side, the 2nd kind of method that base station is synchronous that the embodiment of the present invention provides, comprises the following steps:

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

Step 402: base station arranges the layer, sync grade of self according to described configuration information, by the layer, sync grade that self layer, sync grade is set in this configuration information; If the layer, sync grade of this base station is not minimum layer, sync grade, then determine synchronisation source, and realize synchronous 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 synchronous with this base station.

In step 401, base station receives the configuration information comprising layer, sync grade that gateway equipment sends, and specific implementation can be as follows:

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

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

Above-mentioned determine that the method for synchronisation source can be as follows:

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

Search adjacent cell signal, selects the base station at the adjacent cell place that the layer, sync grade searched is minimum as synchronisation source.

Preferably, after base station receives described configuration information, base station receives the reconfiguration information that gateway equipment sends after network deployment changes, and comprises the layer, sync grade after renewal in this reconfiguration information; Base station arranges the layer, sync grade of self again according to this reconfiguration information, by the layer, sync grade that self layer, sync grade is set in this reconfiguration information; If the layer, sync grade of this base station is not minimum layer, sync grade after again arranging, then redefine synchronisation source, and realize synchronous with the synchronisation source redefined.

Same, the above-mentioned method redefining synchronisation source can be as follows:

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

As shown in Figure 4 b, for gateway equipment side, the 2nd kind of synchronizing information feedback method that the embodiment of the present invention provides, comprises the following steps:

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

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

In step 412, the configuration information comprising described layer, sync grade is sent to base station by gateway equipment, and specific implementation can be as follows:

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

After the synchronization level request message that gateway equipment sends when receiving base station and do not search effective synchronisation source, the configuration information comprising described layer, sync grade is sent to base station.

Preferably, after the configuration information comprising layer, sync grade is sent to base station by gateway equipment, gateway equipment sends reconfiguration information after network deployment 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 again arranged for base station after network deployment changes.

How effectively synchronous problem is carried out, the method that the embodiment of the present invention provides the third base station synchronous in order to solve the base station based on local IP connecting system.

See Fig. 5 a, for base station side, the method that the third base station that the embodiment of the present invention provides is synchronous, comprises 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 layer, sync class information comprising adjacent base station that OAM returns; This neighbour base station be this base station of determining according to the positional information of this base station of OAM each adjacent base station in the minimum adjacent base station of layer, sync grade;

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

Preferably, carry out with the synchronisation source searched in base station synchronous after, it is possible to perform following steps:

If A and the synchronous success of this synchronisation source, then return the synchronous of information comprising this synchronisation source to OAM and successfully indicate;

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 layer, sync class information comprising the adjacent base station redefined that OAM returns to, layer, sync class information according to the adjacent base station redefined searches for synchronisation source again, and carry out synchronous with the synchronisation source again searched, return steps A.

Preferably, after step 501, base station receives the configuration information that OAM resends after network deployment changes, and comprises the layer, sync class information of the adjacent base station redefined in the configuration information that this resends; Layer, sync class information according to the adjacent base station redefined searches for synchronisation source again, and carries out synchronous with the synchronisation source again searched; If synchronously success, then return to OAM and successfully indicate, and the layer, sync grade high one-level of synchronisation source that the layer, sync grade proportion new search again arranging this base station arrives; If synchronization failure, then keep current layer, sync grade, and to the instruction that OAM transmission layer, sync grade remains unchanged.

As shown in Figure 5 b, for OAM side, the method that the third base station that the embodiment of the present invention provides is synchronous, comprises 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 adjacent base station that in each adjacent base station of this base station, layer, sync grade is minimum 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 configuration information is sent to base station by OAM, if OAM receives the synchronous of the information comprising synchronisation source of base station transmission and successfully indicates, then determining according to this synchronous successfully instruction and store the layer, sync grade of this base station, 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 the adjacent base station that in the adjacent base station do not selected, layer, sync grade is minimum, if there is not the adjacent base station do not selected, the adjacent base station then redefined can be this OAM, the layer, sync class information of this OAM can be set to sky, carry out with this OAM in base station synchronous and after returning confirmation of synchronization message, the layer, sync grade of base station is recorded as minimum layer, sync grade by OAM.

Preferably, after configuration information is sent to base station by OAM, OAM is after network deployment changes, positional information according to this base station redefines an adjacent base station of this base station, namely redefine the adjacent base station that in each adjacent base station, layer, sync grade is minimum, and the configuration information of the layer, sync class information comprising the adjacent base station redefined is sent to this base station. If follow-up OAM receives the synchronous of the information comprising synchronisation source of base station transmission and successfully indicates, then determining according to this synchronous successfully instruction and store the layer, sync grade of this base station, 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 based on local IP connecting system: by coordinating based on self-adaptation between local IP connecting system node of network, synchronisation source relation in adjustment network deployment, it is achieved effectively synchronous between base station.

Specifically comprise three kinds of situations:

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

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

Evading mechanism is: self layer, sync grade is set to 0 by base station 1, and the layer, sync searching for neighbor cell within time T0 is arranged, if T0 time-out does not all search out the co-frequency neighbor cell of 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 timer T1, and continue to monitor community 2, if timer 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 to be greater than the value of base station measurement all adjacent cells layer, sync grade required time, and T1 is set to be greater than the value again measuring a community layer, sync grade required time, T0 and T1 can configure by OAM or base station is arranged voluntarily. For further collision free, T1 can be set to get 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 selected voluntarily base station, GW is if it is determined that conflict in not adjacent with other base station of base station selected layer, sync grade, to base station feedback confirmation, such as Fig. 6 a;Otherwise feedback refuse information also carries the layer, sync class information into base station configuration, such as Fig. 6 b.

Scheme two: GW is directly base station configuration synchronization layer grade;

GW stores base station layer, sync 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, comprising layer, sync grade, can also comprising and need synchronous information of adjacent cells, layer, sync grade is determined in base station, and determines synchronisation source according to the configuration received. When there being base station switching on and shutting down to make network deployment scenario 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 comprise the layer, sync grade of expectation, GW sends configuration information to base station, comprising the layer, sync grade of configuration, it is also possible to comprises and needs synchronous information of adjacent cells, layer, sync grade is determined in base station, and determines synchronisation source according to the configuration received. When there being base station switching on and shutting down to make network deployment scenario 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 is fed 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 all adjacent base stations are not replied or reply confirmation, GW to this base station feedback confirmation, such as Fig. 6 e; If there being an adjacent base station to reply exclude information and carry synchronization stratum information, this information is forwarded to this base station by GW, 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 the foundation that feedback acknowledgment still refuses, and whether 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: by OAM configurating base station layer, sync grade;

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 a new AP starts shooting, the positional information of oneself is reported in OAM registration process, OAM is according to positional information, roughly determine adjacent base station (i.e. AP) information around it, select the adjacent base station that in adjacent base station, layer, sync grade is minimum, 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 carries out synchronous. If synchronously success, then return to OAM and successfully indicate, OAM determines the layer, sync grade of this AP according to its instruction and stores; If synchronously unsuccessful, returning and unsuccessfully indicate, 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 switching on and shutting down to make network deployment scenario change, it is possible to send configuration messages 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 synchronous to realize, and layer, sync grade deterministic process terminates.If there is no 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 reached greatest level), perform step 2.

Step 2: base station working frequency points is set to from adjacent cell frequency distance away from available frequency, and the layer, sync grade arranging self is 0. Start timer T0, the layer, sync grade of search adjacent cell, if T0 time-out does not all search 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: start timer 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 taking this adjacent cell as synchronisation source, terminates layer, sync grade deterministic process.

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

Illustrate further for AP1, AP2. The T0 of AP1, AP2 is identical value by default configuration, T1-AP1 and T1-AP2 gets randomized number by being uniformly distributed between [Tmin, Tmax].

AP1 and AP2 opens in consecutive position simultaneously, and does not all have effective synchronisation source. AP1, AP2 are set to layer, sync grade 0 simultaneously, and each self-starting T0. AP1 finds AP2, and when starting T1-AP1, T1-AP1 time-out, AP2 layer, sync grade 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: base station and GW consult 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 synchronous to realize, and layer, sync grade deterministic process terminates. If there is no 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 reached greatest level), perform step 2.

Step 2: base station working frequency points is set to from adjacent cell frequency distance away from available frequency, 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, the base station layer, sync class information stored according to GW and information of adjacent cells, it is determined that whether base station as layer, sync grade 0, if passable, then can reply confirmation; If the layer, sync grade having another adjacent cell is 0, then reply exclude information, and selection of land suggestion base station layer, sync grade can be set to 1.

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

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

The firm network break-in in base station:

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

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

Or,

Network deployment scenario changes:

Step one: network is disposed and changed, 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 and need synchronous information of adjacent cells;

Step 2: base station receives the base station reconfiguration information that GW sends, according to the layer, sync grade of layer, sync class information configuration wherein self, 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 2: send base station layer, sync rank request information to GW, wherein selection of land can comprise the layer, sync grade (differ and be decided to be 0) advised base station.

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 base station configuration information that GW sends, according to layer, sync class information self layer, sync grade of configuration wherein, and the layer, sync grade monitoring adjacent cell is 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 synchronous, and layer, sync grade deterministic process terminates. If there is no synchronisation source or there is no effective synchronisation source (adjacent cell synchronisation source grade has reached greatest level 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 base station to reply exclude information, and selection of land can carry the layer, sync grade of suggestion, then perform step 5.

Step 4: GW sends comformed information to base station 1.

Step 5: GW sends exclude information to base station 1, the layer, sync grade configuration of send 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;

The firm network break-in of AP:

After step one: AP starts shooting, the positional information of oneself is reported in OAM registration process, OAM is according to positional information, roughly determine adjacent base station (i.e. AP) information around it, select the adjacent base station that in adjacent base station, layer, sync grade is minimum, in configuration parameter, selected adjacent base station and layer, sync class information thereof are sent to AP.

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

If synchronously success, then return to OAM and successfully indicate, OAM confirms the layer, sync grade of current AP (the layer, sync grade+1 of synchronisation source) according to this instruction and stores; If it is synchronously unsuccessful, then OAM continues according to positional information, the adjacent base station selecting layer, sync grade minimum in the adjacent collection of base stations do not selected, and in configuration parameter, selected adjacent base station and layer, sync class information thereof are sent to AP, AP is repeating step two then, until choosing suitable synchronisation source.

If still not having 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. After AP returns confirmation message, the layer, sync grade of this AP is designated as 0 by OAM.

Or,

Network deployment scenario changes:

Step one: network is disposed and changed, OAM determines to change layer, sync grade and the positional information of 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 configuration information that GW sends, and attempts monitoring adjacent cell layer, sync grade according to layer, sync class information wherein and determines synchronisation source.

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

See Fig. 7, the embodiment of the present invention provides a kind of base station, and this base station comprises:

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

Whether determining unit 71, conflict with the layer, sync grade of adjacent base station for determining the layer, sync grade of this base station;

First processing unit 72, for when described determining unit determines conflict, again arranging the layer, sync grade of this base station, and selects the adjacent base station of conflict as synchronisation source, it is achieved synchronous with this synchronisation source;

2nd processing unit 73, for when described determining unit is determined not conflict, being fixed as minimum layer, sync grade by the layer, sync grade of this base station, so that adjacent base station carries out synchronous with this base station.

Further, described determining unit 71 for:

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

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

Further, described determining unit 71 for:

Searching for adjacent cell signal when the first setting in the time of length, if not searching the signal that layer, sync grade is the co-frequency neighbor cell of minimum layer, sync grade, then determining that the layer, sync grade of this base station is not conflicted with the layer, sync grade of adjacent base station;

Further, described determining unit 71 for:

If the feedback information of gateway equipment 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 equipment is exclude information, then determine that the layer, sync grade of this base station is conflicted with the layer, sync grade of adjacent base station;

Described confirmation is gateway equipment after the information of the layer, sync grade of this base station is sent to adjacent base station, the information sent when receiving the confirmation replied adjacent base station or do not receive the reply of adjacent base station when setting in length;Described exclude information is gateway equipment after the information of the layer, sync grade of this base station is sent to adjacent base station, the information sent when receiving the exclude information replied adjacent base station.

Further, described first processing unit 72 for:

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

Further, described first processing unit 72 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.

See Fig. 8, the embodiment of the present invention provides a kind of base station, and this base station comprises:

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

Synchronous 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, then determine synchronisation source, and realize synchronous with this synchronisation source.

Further, described reception unit 80 for:

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

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

Further, this base station also comprises:

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

The layer, sync grade of self is set again according to described reconfiguration information; If the layer, sync grade of this base station is not minimum layer, sync grade after again arranging, then redefine synchronisation source, and realize synchronous with this synchronisation source.

Further, described synchronous unit 81 for:

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

See Fig. 9, the embodiment of the present invention provides a kind of base station, and this base station comprises:

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 layer, sync class information comprising adjacent base station that OAM returns; Described adjacent base station is the adjacent base station that the layer, sync grade of this base station that OAM determines according to the positional information of this base station is minimum;

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

Further, this base station comprises further:

Instruction unit 93, for, when with this synchronisation source synchronous successful, returning the synchronous of information comprising described synchronisation source and successfully indicate to OAM;

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 layer, sync class information comprising the adjacent base station redefined that OAM returns to, layer, sync class information according to the adjacent base station redefined searches for synchronisation source again, and carries out synchronous with the synchronisation source again searched.

Further, this base station comprises further:

Updating block 94, for receiving the configuration information that OAM resends after network deployment changes, comprises the layer, sync class information of the adjacent base station redefined in the configuration information that this resends; Layer, sync class information according to the adjacent base station redefined searches for synchronisation source again, and carries out synchronous with the synchronisation source again searched;

If synchronously success, then return to OAM and successfully indicate, and the layer, sync grade high one-level of synchronisation source that the layer, sync grade proportion new search again arranging this base station arrives; If synchronization failure, then keep current layer, sync grade, and to the instruction that OAM transmission layer, sync grade remains unchanged.

See Figure 10, the embodiment of the present invention provides a kind of gateway equipment, and this gateway equipment comprises:

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

Whether feedback unit 102, conflict with the layer, sync grade of adjacent base station for determining the layer, sync grade of this base station, and return feedback information according to determination result to base station.

Further, described feedback unit 102 for:

If according to the synchronization stratum information of all base stations stored and information of adjacent cells, it is determined that the layer, sync grade of this base station not layer, sync grade with adjacent base station conflict, then return confirmation to base station; If the synchronization stratum information according to all base stations stored 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 exclude 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 not receiving the reply of adjacent base station when setting in length, then return confirmation to base station; If receiving the exclude information that adjacent base station is replied, then return exclude information to base station.

See Figure 11, the embodiment of the present invention provides a kind of gateway equipment, and this gateway equipment comprises:

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

Send unit 112, for the configuration information comprising described layer, sync grade is sent to base station.

Further, described transmission unit 112 for:

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

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

Further, this gateway equipment also comprises:

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

See Figure 12, the embodiment of the present invention provides a kind of maintenance and management entity OAM, and this OAM comprises:

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

Arrangement unit 122, for determining, according to the positional information of this base station, the adjacent base station that the layer, sync grade of this base station is minimum, and is sent to this base station by the configuration information of the layer, sync class information comprising this neighbour base station.

Further, this OAM also comprises:

Processing unit 123, for receive the information comprising synchronisation source that base station sends synchronous successfully indicate time, determine according to this synchronous successfully instruction and store the layer, sync grade of this base station;

When the synchronization failure receiving the information comprising synchronisation source that base station sends indicates, 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 comprises:

Reshuffle unit 124, for, after network deployment 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 useful effect of the present invention comprises:

In the synchronous scheme in the first base station 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 whether the layer, sync grade determining this base station conflicts with the layer, sync grade of adjacent base station; If conflict, then the layer, sync grade of this base station is set again, and selects the adjacent base station of conflict as synchronisation source, it is achieved be synchronous 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 synchronous with this base station, it is seen that, this scheme regulates layer, sync grade automatically by base station distribution formula, solves how base station carries out synchronous problem when not searching effective synchronisation source.

In the 2nd kind of synchronous scheme in base station that the embodiment of the present invention provides, base station receives the configuration information comprising layer, sync grade that gateway equipment 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, then determine synchronisation source, and realize synchronous with this synchronisation source. Visible, this scheme indicates its layer, sync grade by gateway equipment to base station, and base station carries out synchronously according to the layer, sync grade of instruction, thus solves how base station carries out synchronous problem.

In the synchronous scheme in the third base station 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 layer, sync class information comprising adjacent base station that OAM returns, layer, sync class information search synchronisation source according to this neighbour base station, and carry out synchronous with this synchronisation source. Visible, this scheme indicates the layer, sync grade of synchronisation source by OAM to base station, and base station is synchronous to carry out according to the layer, sync hierarchical search synchronisation source of instruction, thus solves how base station carries out synchronous problem.

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

These computer program instructions also can be stored in and can guide in computer-readable memory that computer or other programmable data processing device work in a specific way, making the instruction that is stored in this computer-readable memory produce the manufacture comprising instruction device, this instruction device realizes the function specified in schema flow process or multiple flow process and/or skeleton diagram square frame 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 a series of operation steps to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for realizing the step of the function specified in schema flow process or multiple flow process and/or skeleton diagram square frame or multiple square frame.

Although having described the preferred embodiments of the present invention, but those skilled in the art once the substantially creative concept of cicada, then these embodiments can be made other change and amendment. Therefore, it is intended that the appended claims shall be construed comprise 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 and not depart from the spirit and scope of the present invention by the technician of this area. Like this, 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 also is intended to comprise these change and modification.

Claims

1. the method that a base station is synchronous, it is characterised in that, the method comprises:

2. the method for claim 1, it is characterised in that, whether the described layer, sync grade determining this base station conflicts with the layer, sync grade of adjacent base station, specifically comprises:

3. method as claimed in claim 2, it is characterised in that, described determine whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station by search adjacent cell signal, specifically comprise:

4. method as claimed in claim 2, it is characterised in that, the described feedback information according to gateway equipment determines whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station, specifically comprises:

5. method as claimed in claim 4, it is characterised in that, the adjacent base station of described selection conflict, as synchronisation source, specifically comprises:

6. such as the method as described in arbitrary in claim 1-5, it is characterised in that, the described layer, sync grade again arranging this base station, specifically comprises:

7. a synchronizing information feedback method, it is characterised in that, the method comprises:

8. method as claimed in claim 7, it is characterised in that, described gateway equipment determines whether the layer, sync grade of this base station conflicts with the layer, sync grade of adjacent base station, and returns feedback information according to determination result to base station, specifically comprises:

If gateway equipment is according to the synchronization stratum information of all base stations stored and information of adjacent cells, it is determined that the layer, sync grade of this base station not layer, sync grade with adjacent base station conflict, then return confirmation to base station; If the synchronization stratum information according to all base stations stored 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 exclude information to base station; Or,

9. a base station, it is characterised in that, this base station comprises:

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

11. base stations as claimed in claim 10, it is characterised in that, described determining unit is used for:

12. base stations as claimed in claim 10, it is characterised in that, described determining unit is used for:

Described confirmation is gateway equipment after the information of the layer, sync grade of this base station is sent to adjacent base station, the information sent when receiving the confirmation replied adjacent base station or do not receive the reply of adjacent base station when setting in length; Described exclude information is gateway equipment after the information of the layer, sync grade of this base station is sent to adjacent base station, the information sent when receiving the exclude information replied adjacent base station.

13. base stations as claimed in claim 11, it is characterised in that, described first processing unit is used for:

14. such as the base station as described in arbitrary in claim 9-13, it is characterised in that, described first processing unit is used for:

15. 1 kinds of gateway equipment, it is characterised in that, this gateway equipment comprises:

16. gateway equipment as claimed in claim 15, it is characterised in that, described feedback unit is used for:

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 not receiving the reply of adjacent base station when setting in length, then return confirmation to base station;If receiving the exclude information that adjacent base station is replied, then return exclude information to base station.