CN105657815B - The method and apparatus of base station synchronization - Google Patents
The method and apparatus of base station synchronization Download PDFInfo
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- CN105657815B CN105657815B CN201610180468.2A CN201610180468A CN105657815B CN 105657815 B CN105657815 B CN 105657815B CN 201610180468 A CN201610180468 A CN 201610180468A CN 105657815 B CN105657815 B CN 105657815B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Abstract
The embodiment of the invention discloses a kind of methods and apparatus of base station synchronization, are related to wireless communication technology field, for solving the problems, such as how the base station based on local IP access system is effectively synchronized.In the present solution, base station receives the configuration information comprising layer, sync grade of gateway transmission；The layer, sync grade of itself is arranged according to the configuration information for base station；If the layer, sync grade of the base station is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronous with the synchronisation source.As it can be seen that this programme solves the problems, such as how base station synchronizes.
Description
It is 2012-05-29 that present patent application file, which is the applying date, application No. is 201210172058.5, invention name
The referred to as 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 more particularly to a kind of methods and apparatus of base station synchronization.
Background technique
In order to meet the growing data traffic requirement of user, one kind based on long term evolution (Long Term Evolve,
LTE) the base station IP access system of system is come into being.Base station IP access system passes through building Local wireless network,
The network coverage and wirelessly access are provided by base station (Access Point, also known as access point base station) equipment for user.By
The network architecture of flattening is used in base station IP access system, it can simply and cost effectively realize user equipment
The access of (User Equipment, UE) to external network, as shown in Figure 1.This framework is based entirely on the framework of access net,
The core net for eliminating LTE system, simplifies data transfer path and network complexity.This base station IP access architecture is again
Referred to as LTE-Hi system.
Base station IP access system is based on TD SDMA-long term evolution (TD-SCDMA Long Term
Evolution, TD-LTE) technology, has followed requirement of the TD-LTE system for synchronization among base stations.This is because being adopted in uplink and downlink
With in time division duplex (TDD Time Division Duplex, TDD) system of identical frequency point, if asynchronous between each base station,
The uplink that neighboring community's terminal is sent, which can be transmitted to receive to this cell downlink, brings interference, and only stringent synchronization can just be kept away
Exempt from serious interference.
With base station IP access system more similarly LTE Femto, i.e., LTE femtocell (Home eNodeB,
HeNB)。
LTE femtocell mainly uses following three kinds of simultaneous techniques:
The first, global positioning system (Global Positioning Systems, GPS)；
If HeNB is mounted with GPS receiver, GPS satellite synchronization signal can be obtained, GPS can be provided precisely for it
Sync identification (100ns), however the use of GPS is limited to environment, and especially environment can not almost work indoors, Er Qiecheng
This is higher.
The second, Institute of Electrical and Electronics Engineers (IEEE Institute of Electrical and
Electronics Engineers, IEEE) 1588v2；
Under good backhaul link network support (fiber optic Ethernet that can be operator's laying), 1588v2 also can
The synchronization accuracy of Microsecond grade is provided, but can all have the backhaul link of high quality to support under not all scene, Er Qie electricity
Cable and x Digital Subscriber Line road (X digital subscriber line, XDSL) also have that time delay is unstable,
Synchronization accuracy can be produced bigger effect.
Third, network monitoring；
Network monitoring scheme can work under conditions of GPS and 1588v2 scheme is not available, therefore for TD-LTE
This is a kind of essential synchronization mechanism for HeNB.Network monitoring mechanism is referred to by receiving synchronized network section
The signal of point (synchronisation source) obtains synchronous method.Forbid transmitting after HeNB starting but before there is no synchronization,
HeNB, which must first go through, to be monitored the signal of synchronization node and carries out just can be carried out normal transmission after Network Synchronization, and it is subsequent also
Synchronization is periodically safeguarded.For HeNB, synchronisation source can choose synchronized macro base station (MeNB), HeNB
Timing is obtained by receiving synchronization signal or the reference symbol of MeNB, as shown in Figure 2 a.But when macrocell network covers
When undesirable or HeNB is located at building depths, the synchronization signal for obtaining macro base station will receive certain influence, at this time HeNB
Synchronize and can be realized by way of multi-hop, i.e., by and synchronized HeNB synchronize, as shown in Figure 2 b.
It is synchronous for multi-hop, need to introduce the concept of layer, sync, layer, sync can be defined as needing synchronous HeNB with
The layer, sync grade of the hop count passed through between the source GPS, some HeNB is bigger by 1 than the upper level source that it obtains synchronization.For example, Fig. 2 a and
The layer, sync grade that the layer, sync grade that the layer, sync grade of MeNB in Fig. 2 b is 0, HeNB1 is 1, HeNB2 is 2.
3GPP discusses following three kinds of network monitoring mechanism:
First, it is based on primary synchronization signal (Primary Synchronized Signal, PSS)/secondary synchronization signal
The monitoring of (Secondary Synchronization Signal, SSS).HeNB is by receiving synchronization node under this mechanism
PSS/SSS synchronize, the PSS/SSS that HeNB is tracked during silent not can be carried out normal transmission.
Second, it is based on multimedia broadcast multi-broadcasting business Single Frequency Network (Multimedia Broadcast multicast
Service Single Frequency Network, MBSFN) subframe monitoring.HeNB is by being claimed as silent subframe
MBSFN sub-frame, UE then ignore the subframe when receiving.This method is all suitable for single-hop and multi-hop synchronization mechanism, in multi-hop feelings
Under condition, certain subframes can be claimed as MBSFN sub-frame, the HeNB statement of different layers with certain period by each layer of HeNB
MBSFN sub-frame position be different.It is limited to maximum MBSFN sub-frame configuration, maximum supports 4 to jump.
Third, the monitoring based on the configuration of TDD special subframe.By configuring less descending pilot frequency time slot to HeNB
(DwPTS) symbol and more DwPTS symbol is configured to MeNB so that HeNB can use its protect time slot (GP) when
Between it is same to obtain to measure the exclusive pilot signal of cell (Cell-specific reference signals, CRS) of MeNB
Step.But since general DwPTS equipping rules are covering high capacity cells small for interior etc. using more DwPTS symbol
Configuration, for outdoor positioning, in the cell extensively covered, then the less DwPTS of symbolization is configured, and the configuration of this synchronous method is wanted
It asks then just with the network configuration principle of DwPTS on the contrary, therefore certain restrictions, and this will be constituted to the network configuration of operator
Kind method cannot generally support the Network Synchronization of 2 jumps or more.
System based on local IP access is likely to commonly used in indoor and hot spot region using different from LTE system
High band, be difficult to carry out network monitoring using macro base station as synchronisation source to realize and synchronize, even if being based partially on local IP access system
The base station (base station hereinafter referred LTE-Hi) of system obtains absolute synchronization source, when the base station LTE-Hi is densely deployed in indoor hot zone
When domain, the maximum layer, sync number of plies as defined in TD-LTE network monitoring mechanism can not be met the requirements.
To sum up, base station based on local IP access system indoors hot spot region dense deployment when, base station can not obtain absolutely
Effective synchronisation source can not be obtained to synchronisation source, or since the synchronous number of plies of TD-LTE maximum is limited.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus of base station synchronization, for solving based on local IP access system
The problem how base station is effectively synchronized.
A kind of method of base station synchronization, this method comprises:
Base station receives the configuration information comprising layer, sync grade of gateway transmission；
The layer, sync grade of itself is arranged according to the configuration information for base station；If the layer, sync grade of the base station is not minimum
Layer, sync grade, it is determined that synchronisation source, and realize synchronous with the synchronisation source.
A kind of synchronizing information feedback method, this method comprises:
Gateway determines the layer, sync grade of base station；
Configuration information comprising the layer, sync grade is sent to base station by gateway.
A kind of base station, the base station include:
Receiving unit, for receiving the configuration information comprising layer, sync grade of gateway transmission；
Synchronization unit, for itself layer, sync grade to be arranged according to the configuration information；If the layer, sync etc. of the base station
Grade is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronous with the synchronisation source.
A kind of gateway, the gateway include:
Determination unit, for determining the layer, sync grade of base station；
Transmission unit, for will include that the configuration information of the layer, sync grade is sent to base station.
In base station synchronization scheme provided in an embodiment of the present invention, what base station received gateway transmission includes layer, sync grade
Configuration information, the layer, sync grade of itself is set according to the configuration information；If the layer, sync grade of the base station is not minimum same
Walk layer grade, it is determined that synchronisation source, and realize synchronous with the synchronisation source.As it can be seen that this programme is referred to by gateway to base station
Show its layer, sync grade, base station is synchronized according to the layer, sync grade of instruction, to solve what how base station synchronized
Problem.
Detailed description of the invention
Fig. 1 is the configuration diagram of base station IP access system in the prior art；
Fig. 2 a and Fig. 2 b are network monitoring schematic diagram of mechanism in the prior art；
Fig. 3 a is the first base station synchronization method flow diagram provided in an embodiment of the present invention for base station side；
Fig. 3 b is the first base station synchronization method flow diagram provided in an embodiment of the present invention for gateway side；
Fig. 4 a is second of base station synchronization method flow diagram provided in an embodiment of the present invention for base station side；
Fig. 4 b is second of base station synchronization method flow diagram provided in an embodiment of the present invention for gateway side；
Fig. 5 a is the third base station synchronization method flow diagram provided in an embodiment of the present invention for base station side；
Fig. 5 b is the third base station synchronization method flow diagram provided in an embodiment of the present invention for the side OAM；
Fig. 6 a and Fig. 6 b synchronize the schematic diagram of layer negotiation mechanism for the AP and GW in the embodiment of the present invention；
Fig. 6 c is the schematic diagram of the specified AP layer, sync grade of GW in the embodiment of the present invention；
Fig. 6 d specifies the schematic diagram of AP layer, sync grade for the AP request in the embodiment of the present invention, GW；
Fig. 6 e is schematic diagram of the GW in the embodiment of the present invention by adjacent base station confirmation base station synchronization layer grade setting；
Fig. 6 f is that the GW in the embodiment of the present invention refuses the schematic diagram that base station synchronization layer grade is arranged by adjacent base station；
Fig. 7 is the structural schematic diagram of the first base station provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of second of base station provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of the third base station provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of the first gateway provided in an embodiment of the present invention；
Figure 11 is the structural schematic diagram of second of gateway provided in an embodiment of the present invention；
Figure 12 is the structural schematic diagram of OAM equipment provided in an embodiment of the present invention.
Specific embodiment
In order to solve the problems, such as how the base station based on local IP access system is effectively synchronized, the embodiment of the present invention is mentioned
For 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 provided in an embodiment of the present invention, including following step
It is rapid:
Step 301: base station is set as minimum same after not searching effective synchronisation source, by the layer, sync grade of the base station
Layer grade is walked, and determines whether the layer, sync grade of the base station conflicts with the layer, sync grade of adjacent base station；Here, it has not searched
The synchronisation source of effect refers to that the layer, sync grade for the synchronisation source for not searching synchronisation source or searching reaches maximum layer, sync grade；
Step 302: if conflict, resets the layer, sync grade of the base station, and selecting the adjacent base station of conflict as same
Step source is realized synchronous with the synchronisation source；
Step 303: if not conflicting, the layer, sync grade of the base station being fixed as minimum layer, sync grade, so that adjacent base
It stands and the base station synchronizes.
It in step 301, determines whether the layer, sync grade of the base station conflicts with the layer, sync grade of adjacent base station, implements
It can be using one of the following two kinds method:
First, by search for adjacent cell signal determine the base station layer, sync grade whether the layer, sync grade with adjacent base station
Conflict；
Specifically, adjacent cell signal is searched within the time of the first setting duration, if not searching layer, sync grade is most
The signal of the co-frequency neighbor cell of low layer, sync grade, it is determined that the layer, sync grade of the layer, sync grade of the base station and adjacent base station is not
Conflict；
If searching the signal for the co-frequency neighbor cell that layer, sync grade is minimum layer, sync grade, duration is set second
Time in continue to monitor the signal of the co-frequency neighbor cell, if second setting duration time in the co-frequency neighbor cell synchronization
Layer grade is minimum layer, sync grade always, it is determined that the layer, sync grade of the base station and the base station where the co-frequency neighbor cell
Layer, sync grade conflict, if the layer, sync grade of the co-frequency neighbor cell changes within the time of the second setting duration, really
The layer, sync grade of the fixed base station does not conflict with the layer, sync grade of adjacent base station.
Second, the information of the layer, sync grade of the base station is sent to gateway；It is true according to the feedback information of gateway
Whether the layer, sync grade of the fixed base station conflicts with the layer, sync grade of adjacent base station.
Specifically, if the feedback information of gateway is confirmation message, it is determined that the layer, sync grade of the base station and adjacent base
The layer, sync grade stood does not conflict, if the feedback information of gateway is refusal information, it is determined that the layer, sync grade of the base station
Conflict with the layer, sync grade of adjacent base station；
The confirmation message is gateway in the synchronization stratum information and information of adjacent cells according to all base stations of storage, really
The information that the layer, sync grade of the fixed base station is sent after not conflicting with the layer, sync grade of adjacent base station；The refusal information is gateway
Equipment in the synchronization stratum information and information of adjacent cells according to all base stations of storage, determine the base station layer, sync grade and adjacent base
The information sent after the layer, sync grade conflict stood；Alternatively,
The confirmation message is gateway after the information of the layer, sync grade of the base station is sent to each adjacent base station, is connect
It receives the confirmation message of adjacent base station reply or does not receive the information sent when the reply of adjacent base station within the set duration；It is described to refuse
Exhausted information is gateway after the information of the layer, sync grade of the base station is sent to adjacent base station, receives adjacent base station reply
Refuse the information sent when information.
Correspondingly, selecting the adjacent base station of conflict as synchronisation source in step 302, specific implementation can use the following two kinds side
One of method:
First, in the refusal information received comprising conflict adjacent base station information when, select indicated by the information
Adjacent base station is as synchronisation source；
Second, search for adjacent cell signal, select base station where the elementary adjacent cell of the layer, sync searched as
Synchronisation source.
In step 302, the layer, sync grade of the base station is reset, specific implementation can be such that the synchronization of the base station
Layer grade is re-set as the layer, sync grade of one grade than minimum layer, sync higher grade.
Such as Fig. 3 b, for gateway side, the first synchronizing information feedback method provided in an embodiment of the present invention, including with
Lower step:
Step 311: gateway receives the information of the layer, sync grade for the base station that base station is sent；
Step 312: gateway determines whether the layer, sync grade of the base station conflicts with the layer, sync grade of adjacent base station, and
Feedback information is returned to base station according to definitive result.
The specific implementation of step 312 can be such that
If gateway according to the synchronization stratum information (including layer, sync grade) and information of adjacent cells of all base stations of storage,
It determines that the layer, sync grade of the base station does not conflict with the layer, sync grade of adjacent base station, then returns to confirmation message to base station；If according to
The synchronization stratum information and information of adjacent cells of all base stations of storage, determine the layer, sync grade of the base station and the layer, sync of adjacent base station
Grade conflict then returns to refusal information to base station；Alternatively,
After the information of the layer, sync grade of the base station is sent to adjacent base station by gateway, if receiving adjacent base station reply
Confirmation message or the reply for not receiving adjacent base station within the set duration then return to confirmation message to base station；If receiving adjacent base
Stand reply refusal information, then to base station return refusal information.
In order to solve the problems, such as how the base station based on local IP access system is effectively synchronized, the embodiment of the present invention is mentioned
For the method for second of base station synchronization.
A referring to fig. 4, for base station side, the method for second of base station synchronization provided in an embodiment of the present invention, including following step
It is rapid:
Step 401: base station receives the configuration information comprising layer, sync grade that gateway is sent；
Step 402: the layer, sync grade of itself is arranged according to the configuration information for base station, i.e., by the layer, sync grade of itself
The layer, sync grade being set as in the configuration information；If the layer, sync grade of the base station is not minimum layer, sync grade, it is determined that
Synchronisation source, and realize synchronous with the synchronisation source；If the layer, sync grade of the base station is minimum layer, sync grade, adjacent base station meeting
It is synchronized with the base station.
In step 401, base station receives the configuration information comprising layer, sync grade of gateway transmission, and specific implementation can
With as follows:
Base station receives the configuration information comprising layer, sync grade of gateway transmission after being linked into network；Alternatively,
Base station sends synchronization level request message after not searching effective synchronisation source, to gateway；Receive gateway
The configuration information comprising layer, sync grade that equipment returns.
The method of above-mentioned determining synchronisation source can be such that
When also including information of adjacent cells in the configuration information received, layer, sync grade is determined according to the information of adjacent cells
Base station where minimum adjacent cell, using determining base station as synchronisation source；Here information of adjacent cells may include adjacent cell
The information such as layer, sync grade；Alternatively,
Adjacent cell signal is searched for, selects the base station where the elementary adjacent cell of the layer, sync searched as synchronization
Source.
Preferably, base station receives gateway and becomes in network deployment after base station receives the configuration information
The reconfiguration information sent after change includes updated layer, sync grade in the reconfiguration information；Base station is according to the reconfiguration confidence
Breath resets the layer, sync grade of itself, i.e., the layer, sync etc. set the layer, sync grade of itself in the reconfiguration information
Grade；If the layer, sync grade of the base station is not minimum layer, sync grade after resetting, redefine synchronisation source, and realize with
The synchronization of the synchronisation source redefined.
Likewise, the above-mentioned method for redefining synchronisation source can be such that
When also including information of adjacent cells in the reconfiguration information received, layer, sync etc. is determined according to the information of adjacent cells
Base station where the minimum adjacent cell of grade, using determining base station as synchronisation source；Alternatively,
Adjacent cell signal is searched for, selects the base station where the elementary adjacent cell of the layer, sync searched as synchronization
Source.
As shown in Figure 4 b, for gateway side, second of synchronizing information feedback method provided in an embodiment of the present invention, packet
Include following steps:
Step 411: gateway determines the layer, sync grade of base station；The layer, sync grade of base station can be stored in advance
In gateway, gateway determines the layer, sync grade of base station according to the information of storage；
Step 412: the configuration information comprising the layer, sync grade is sent to base station by gateway.
In step 412, the configuration information comprising the layer, sync grade is sent to base station by gateway, and specific implementation can
With as follows:
After gateway is linked into network in base station, the configuration information comprising the layer, sync grade is sent to base station；
Alternatively,
It, will after the synchronization level request message that gateway is sent when receiving base station and not searching effective synchronisation source
Configuration information comprising the layer, sync grade is sent to base station.
Preferably, gateway exists after the configuration information comprising layer, sync grade is sent to base station by gateway
Network deployment to base station sends reconfiguration information after changing, and includes updated layer, sync grade in the reconfiguration information.
Updated layer, sync grade is the layer, sync grade reset after network deployment changes for base station.
In order to solve the problems, such as how the base station based on local IP access system is effectively synchronized, the embodiment of the present invention is mentioned
For 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 provided in an embodiment of the present invention, including following step
It is rapid:
Step 501: base station is in the location information for reporting the base station into the registration process of maintenance and management entity (OAM)；
Receive the configuration information for the layer, sync class information comprising adjacent base station that OAM is returned；The adjacent base station is position of the OAM according to the base station
The elementary adjacent base station of layer, sync in each adjacent base station of the determining base station of confidence breath；
Step 502: base station according to the layer, sync hierarchical search synchronisation source of the adjacent base station in configuration information, and with the synchronisation source
It synchronizes, i.e. the signal of adjacent cell of the search comprising the layer, sync grade, using the adjacent cell as synchronisation source, and it is synchronous with this
Source synchronizes.
Preferably, after base station is synchronized with the synchronisation source searched following steps can be executed:
If A, success synchronous with the synchronisation source, the synchronizing for information comprising the synchronisation source is returned to OAM and is successfully indicated；
If B, returning to the synchronization failure instruction of the information comprising the synchronisation source to OAM with the synchronization failure of the synchronisation source,
And the configuration information for the layer, sync class information comprising the adjacent base station redefined that OAM is returned to is received, according to again true
The layer, sync class information of fixed adjacent base station re-searches for synchronisation source, and synchronizes with the synchronisation source re-searched for, returns
Step A.
Preferably, base station receives the configuration that OAM is retransmitted after network deployment changes after step 501
Information, comprising the layer, sync class information of the adjacent base station redefined in the configuration information of the retransmission；According to redefining
The layer, sync class information of adjacent base station re-search for synchronisation source, and synchronized with the synchronisation source re-searched for；If synchronous
Success, then return to OAM and successfully indicate, and it is more same than the synchronisation source that re-searches for reset the layer, sync grade of the base station
Walk the high level-one of layer grade；If synchronization failure, current layer, sync grade is kept, and send layer, sync grade to OAM and keep not
The instruction of change.
As shown in Figure 5 b, for the side OAM, the method for the third base station synchronization provided in an embodiment of the present invention, including it is following
Step:
Step 511:OAM receives the location information for the base station that base station reports in registration process；
Step 512:OAM determines that layer, sync is elementary in each adjacent base station of the base station according to the location information of the base station
Adjacent base station, and the configuration information of the layer, sync class information comprising the adjacent base station is sent to the base station.
Further, after OAM sends configuration information to base station, if OAM receive base station transmission comprising synchronize
Synchronizing for the information in source successfully indicates, then the layer, sync grade for successfully indicating to determine and store the base station, the base are synchronized according to this
The layer, sync grade stood is determined as the layer, sync grade of one grade than the layer, sync higher grade of the synchronisation source；
If the synchronization failure for receiving the information comprising synchronisation source of base station transmission indicates that OAM is according to the position of the base station
Confidence ceases an adjacent base station for redefining the base station；And matching the layer, sync class information comprising the adjacent base station redefined
Confidence breath is sent to the base station.Here, the adjacent base station redefined can be layer, sync grade in the adjacent base station of unselected mistake
Minimum adjacent base station, the adjacent base station of unselected mistake, the then adjacent base station redefined can be the OAM if it does not exist, the OAM's
Layer, sync class information can be set to sky, and after base station and the OAM are synchronized and returned to confirmation of synchronization message, OAM is by base
The layer, sync grade stood is recorded as minimum layer, sync grade.
Preferably, OAM is after network deployment changes, according to the base after OAM sends configuration information to base station
The location information stood redefines an adjacent base station of the base station, that is, redefines the elementary neighbour of layer, sync in each adjacent base station
Base station, and the configuration information of the layer, sync class information comprising the adjacent base station redefined is sent to the base station.If subsequent OAM
The synchronizing for the information comprising synchronisation source for receiving base station transmission successfully indicates, then synchronizes successfully instruction according to this and determine and store
The layer, sync grade of the base station, the layer, sync grade of the base station are determined as one grade than the layer, sync higher grade of the synchronisation source
Layer, sync grade.
The present invention will be described combined with specific embodiments below:
The present invention proposes a kind of base station synchronization method based on local IP access system: by being based on local IP access system
Adaptively coordinate between network node, synchronisation source relationship in adjustment network deployment, it is effectively synchronous between realization base station.
Specifically include three kinds of situations:
Situation 1: base station distribution formula automatically adjusts layer, sync grade.
Base station is adjusted to the available frequency point farthest apart from adjacent cell frequency point when no synchronisation source is available, by itself frequency point,
And it is customized for minimum layer, sync 0.Adjacent base station can synchronize and be set as more higher leveled layer, sync.When multiple adjacent base stations
When statement is lowermost layer synchronisation source, need to introduce Hedging mechanism.
Hedging mechanism are as follows: base station 1 sets 0 for itself layer, sync grade, and the same of neighboring community is searched in time T0
Layer setting is walked, if T0 time-out does not all search out the co-frequency neighbor cell of layer, sync grade 0, base station 1 is steady by itself layer, sync grade
It is set to 0；If the layer, sync grade for searching out co-frequency cell 2 is 0, start timer T1, and continue to monitor cell 2, if timing
2 layer, sync grade of device T1 time-out cell is still 0, itself layer, sync is set as 1 by base station 1, and using 2 place base station of cell as synchronization
Source.T0 is set greater than the value the time required to all adjacent cell layer, sync grades of base station measurement, and T1, which is set greater than, to be re-measured
Value the time required to one cell synchronous layer grade, T0 and T1 can be configured by OAM or base station self-setting.To further avoid touching
It hits, T1 can be set as taking arbitrary value by being uniformly distributed in a section [Tmin, Tmax].
The layer, sync grade of situation 2:GW unified management adjacent base station；
Scheme one: GW stores the synchronization stratum information and information of adjacent cells of all base stations, when base station determines itself layer, sync etc.
When grade, layer, sync grade is sent to GW and determines request message, wherein comprising the layer, sync grade that base station voluntarily selects, if GW is true
Fixed base station selected layer, sync grade is not clashed with other adjacent base stations, to base station feedback confirmation message, such as Fig. 6 a；Otherwise anti-
It presents refuse information and carries the layer, sync class information for base station configuration, such as Fig. 6 b.
Scheme two: GW is directly base station configuration layer, sync grade；
GW stores base station synchronization layer class information and information of adjacent cells, as fig. 6 c, after base station access network network, Xiang Ji
It stands and sends configuration information, can also include the information of adjacent cells that need to be synchronized, base station determines layer, sync including layer, sync grade
Grade, and synchronisation source is determined according to the configuration received.When there is base station switch machine that network deployment is made to happen variation, GW can
To send reconfiguration message to AP, with the layer, sync class information etc. for reconfiguring AP.Alternatively,
As shown in fig 6d, after base station access network network, configuring request information is sent to GW, wherein may include desired same
Layer grade is walked, GW sends configuration information to base station, can also be adjacent small including what need to be synchronized including the layer, sync grade of configuration
Area's information, base station determines layer, sync grade, and determines synchronisation source according to the configuration received.When there is base station switch machine to make Network Dept.
When administration happens variation, GW can send reconfiguration message to AP, with the layer, sync class information etc. for reconfiguring 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, after base station selected layer, sync grade, sends layer, sync grade letter to GW
Breath；GW sends the inquiry of layer, sync grade to other base stations, if confirmation message is not replied or replied to all adjacent base stations, GW to this
Base station feedback confirmation message, such as Fig. 6 e；If there is adjacent base station replys refusal information and carries synchronization stratum information, GW is by the letter
Breath is transmitted to the base station, such as Fig. 6 f.The base station is according to feedback information adjustment layer, sync grade and according to adjacent cell layer, sync grade
State determines synchronisation source.
The foundation that adjacent base station judges that feedback acknowledgment is still refused is whether that the layer, sync grade current with itself conflicts.Such as
Adjacent base station AP1 and AP2 are set as layer, sync grade 0, and AP2 will feed back refuse information and suggest that AP1 is set as layer, sync grade 1.
Situation 3: base station synchronization layer grade is configured by OAM；
Here OAM is network management unit (Network Manager, NM), manages numerous a AP below.OAM can be deposited
Store up the location information and its layer, sync grade of all APs registered with it.
After one new AP booting, in the location information for reporting oneself into OAM registration process, OAM is according to location information, greatly
It causes to determine surrounding adjacent base station (i.e. AP) information, selects the elementary adjacent base station of layer, sync in adjacent base station, and join in configuration
Adjacent base station and layer, sync grade are sent to AP in number.AP determines synchronisation source according to the configuration information received and synchronizes.If
Success is synchronized, then returns to OAM and successfully indicates, OAM is indicated to determine the layer, sync grade of the AP and be stored according to it；If synchronizing not
Success, return unsuccessfully indicate that OAM can continue to select other adjacent base stations as its synchronisation source according to location information, and configure
Adjacent base station and layer, sync grade are sent to AP in parameter.
When there is base station switch machine that network deployment is made to happen variation, configuration message can be sent, to AP to match again
Set the layer, sync grade and adjacent base station information of AP.
Embodiment one: base station voluntarily adjusts layer, sync grade；
Step 1: the layer, sync grade of itself is set as synchronisation source if searching synchronisation source by base station search synchronisation source
Layer, sync grade adds 1, carries out network monitoring to synchronisation source to realize synchronization, layer, sync grade determination process terminates.If no
Synchronisation source (refers to that the layer, sync grade of the synchronisation source searched has reached the maximum without effective synchronisation source without effective synchronisation source
Grade), execute step 2.
Step 2: working frequency points setting is arrived farthest available frequency point with a distance from adjacent cell frequency point by base station, and itself is arranged
Layer, sync grade be 0.Start timer T0, the layer, sync grade of adjacent cell is searched for, if T0 time-out does not all search together
The adjacent cell that layer grade is 0 is walked, step 4 is executed；If searching the adjacent cell that layer, sync grade is 0, step 3 is executed.
Step 3: starting timer T1, the adjacent cell that detection layer, sync grade is 0, if the adjacent cell changes when T1 time-out
Become layer, sync grade, thened follow the steps four, otherwise sets 1 for the synchronization level of itself, and using the adjacent cell as synchronisation source,
Terminate layer, sync grade determination process.
Step 4: the layer, sync grade for fixing this base station is 0.
It is further illustrated by taking AP1, AP2 as an example.The T0 of AP1, AP2 are identical value, T1-AP1 and T1-AP2 by default configuration
Random number is taken by being uniformly distributed between [Tmin, Tmax].
AP1 and AP2 is opened simultaneously in adjacent position, and all without effective synchronisation source.AP1, AP2 are set as layer, sync simultaneously
Grade 0, and each self-starting T0.AP1 has found AP2, starts T1-AP1, and AP2 layer, sync grade is still 0 when T1-AP1 time-out, then AP1
Layer, sync grade is set as 1.AP2 has found AP1, starts T1-AP2, during which detects that AP1 layer, sync grade is changed to 1, terminates
T1-AP2, maintaining layer, sync grade is 0.
Embodiment two: base station and GW negotiate layer, sync grade；
Step 1: the layer, sync grade of itself is set as synchronisation source if searching synchronisation source by base station search synchronisation source
Layer, sync grade adds 1, carries out network monitoring to synchronisation source to realize synchronization, layer, sync grade determination process terminates.If no
Synchronisation source (refers to that the layer, sync grade of the synchronisation source searched has reached the maximum without effective synchronisation source without effective synchronisation source
Grade), execute step 2.
Step 2: working frequency points setting is arrived farthest available frequency point with a distance from adjacent cell frequency point by base station, and itself is arranged
Layer, sync grade be 0.Base station configuration information is sent to GW, wherein including layer, sync class information.
Step 3: GW receive base station send base station configuration information, according to GW storage base station synchronization layer class information and
Information of adjacent cells, determines whether base station can be used as layer, sync grade 0, if it is then replying confirmation message；If there is another
The layer, sync grade of a adjacent cell is 0, then replys refusal information, and optionally suggests that base station sets 1 for layer, sync grade.
Step 4: base station receives the feedback information of GW, determines layer, sync grade.If the base station synchronization layer grade is set as 1,
Synchronisation source is determined according to adjacent cell layer, sync level condition.
Three: GW specific base layer, sync grade of embodiment (GW is directly specified)；
Network is just accessed in base station:
Step 1: after access procedure is completed in base station, GW, which is determined, has new base station to access, and sends base station configuration information to base station,
Wherein include the layer, sync class information of base station, can also include the information of adjacent cells that need to be synchronized；
Step 2: base station receives the base station configuration information that GW is sent, and configures itself according to layer, sync class information therein
Layer, sync grade, and monitor adjacent cell layer, sync grade to determine synchronisation source.
Or,
Network deployment happens variation:
Step 1: network deployment changes, and GW determines the layer, sync grade for needing to change base station, sends base station to base station
Reconfiguration information can also include the information of adjacent cells that need to be synchronized wherein including the layer, sync class information of base station；
Step 2: base station receives the base station reconfiguration information that GW is sent, certainly according to layer, sync class information therein configuration
The layer, sync grade of body, and adjacent cell layer, sync grade is monitored to determine synchronisation source.
Example IV: GW specific base layer, sync grade (AP request, GW are directly specified)；
Step 1: the layer, sync grade of itself is set as synchronisation source if searching synchronisation source by base station search synchronisation source
Layer, sync grade adds 1, carries out network monitoring to synchronisation source to realize synchronization, layer, sync grade determination process terminates.If no
Synchronisation source (refers to that the layer, sync grade of the synchronisation source searched has reached the maximum without effective synchronisation source without effective synchronisation source
Grade), execute step 2.
Step 2: sending base station synchronization layer rating request information to GW, wherein optionally including the layer, sync of base station suggestion
Grade (not necessarily 0).
Step 3: GW determines the layer, sync grade of base station, sends base station configuration information to base station, wherein same comprising base station
Walk layer class information；
Step 4: base station receives the base station configuration information that GW is sent, and configures itself according to layer, sync class information therein
Layer, sync grade, and monitor the layer, sync grade of adjacent cell to determine synchronisation source.
Embodiment five: GW is collected to adjacent base station to be fed back；
Step 1: base station 1 searches for synchronisation source and the layer, sync grade of itself is set as synchronisation source if searching synchronisation source
Layer, sync grade add 1, carry out network monitoring to synchronisation source and realize to synchronize, layer, sync grade determination process terminates.If no
Synchronisation source or no effective synchronisation source (referring to that adjacent cell synchronisation source grade has reached the maximum grade without effective synchronisation source), execute
Step 2.
Step 2: base station 1 sends base station configuration information to GW, wherein including layer, sync class information.
Step 3: GW sends the base station configuration information of base station 1 to other base stations, wherein including layer, sync class information.Such as
Confirmation message is replied in other base stations of fruit or GW does not receive the feedback of other base stations in time span T1, thens follow the steps four；
If there is refusal information is replied in a base station, and the layer, sync grade of suggestion is optionally carried, thens follow the steps five.
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: base station determines layer, sync grade, determines synchronisation source as needed.
Embodiment six: OAM is each base station separate configurations layer, sync grade；
AP just accesses network:
Step 1: after AP booting, in the location information for reporting oneself into OAM registration process, OAM according to location information,
It substantially determines surrounding adjacent base station (i.e. AP) information, selects the elementary adjacent base station of layer, sync in adjacent base station, join in configuration
Selected adjacent base station and its layer, sync class information are sent to AP in number.
Step 2: AP receives the base station configuration information that OAM is sent, and monitors adjacent cell layer, sync grade to determine synchronisation source.
If synchronizing success, return to OAM and successfully indicate, OAM confirms that the layer, sync grade of current AP is (same according to the instruction
The layer, sync grade+1 in step source) and store；If synchronize it is unsuccessful, OAM continue according to location information, in the neighbour of unselected mistake
The elementary adjacent base station of layer, sync is selected in collection of base stations, and by selected adjacent base station and its layer, sync grade in configuration parameter
Information is sent to AP, and AP then repeats step 2, until choosing suitable synchronisation source.
If selected base station is set as by OAM in configuration information still without suitable synchronisation source after attempting all adjacent base stations
Oneself, layer, sync class information is set as empty, is sent to AP.After AP returns to confirmation message, the layer, sync grade of the AP is denoted as by OAM
0。
Or,
Network deployment happens variation:
Step 1: network deployment changes, and OAM determines the layer, sync grade and location information of change AP, and determining needs
The AP of change synchronization level occurs, and sends configuration information to these AP, wherein including AP layer, sync class information；
Step 2: AP receives the configuration information that GW is sent, and is attempted to monitor adjacent cell according to layer, sync class information therein
Layer, sync grade determines synchronisation source.
If synchronizing success, return to OAM and successfully indicate, OAM confirms that the layer, sync grade of current AP is (same according to the instruction
The layer, sync grade+1 in step source) and store；If unsuccessful, AP still keeps original synchronization level and remains unchanged to OAM transmission
Instruction.
Referring to Fig. 7, the embodiment of the present invention provides a kind of base station, which includes:
Setting unit 70, for setting the layer, sync grade of the base station to most after not searching effective synchronisation source
Low layer, sync grade；
Determination unit 71, for determining whether the layer, sync grade of the base station conflicts with the layer, sync grade of adjacent base station；
First processing units 72, for resetting the layer, sync etc. of the base station when the determination unit determines and conflicts
Grade, and select the adjacent base station of conflict as synchronisation source, it realizes synchronous with the synchronisation source；
The second processing unit 73, for when the determination unit determines and do not conflict, the layer, sync grade of the base station to be consolidated
It is set to minimum layer, sync grade, so that adjacent base station is synchronized with the base station.
Further, the determination unit 71 is used for:
Determine whether the layer, sync grade of the base station conflicts with the layer, sync grade of adjacent base station by searching for adjacent cell signal；
Alternatively,
The information of the layer, sync grade of the base station is sent to gateway；The base is determined according to the feedback information of gateway
Whether the layer, sync grade stood conflicts with the layer, sync grade of adjacent base station.
Further, the determination unit 71 is used for:
Adjacent cell signal is searched within the time of the first setting duration, if not searching layer, sync grade is minimum layer, sync
The signal of the co-frequency neighbor cell of grade, it is determined that the layer, sync grade of the base station does not conflict with the layer, sync grade of adjacent base station；
If searching the signal for the co-frequency neighbor cell that layer, sync grade is minimum layer, sync grade, duration is set second
Time in continue to monitor the signal of the co-frequency neighbor cell, if second setting duration time in the co-frequency neighbor cell synchronization
Layer grade is minimum layer, sync grade always, it is determined that the layer, sync grade of the base station and the base station where the co-frequency neighbor cell
Layer, sync grade conflict, if the layer, sync grade of the co-frequency neighbor cell changes within the time of the second setting duration, really
The layer, sync grade of the fixed base station does not conflict with the layer, sync grade of adjacent base station.
Further, the determination unit 71 is used for:
If the feedback information of gateway is confirmation message, it is determined that the layer, sync grade of the base station is synchronous with adjacent base station
Layer grade does not conflict, if the feedback information of gateway is refusal information, it is determined that the layer, sync grade and adjacent base station of the base station
Layer, sync grade conflict；
The confirmation message is gateway in the synchronization stratum information and information of adjacent cells according to all base stations of storage, really
The information that the layer, sync grade of the fixed base station is sent after not conflicting with the layer, sync grade of adjacent base station；The refusal information is gateway
Equipment in the synchronization stratum information and information of adjacent cells according to all base stations of storage, determine the base station layer, sync grade and adjacent base
The information sent after the layer, sync grade conflict stood；Alternatively,
The confirmation message is gateway after the information of the layer, sync grade of the base station is sent to adjacent base station, is received
The confirmation message replied to adjacent base station or the information that sends when not receiving the reply of adjacent base station within the set duration；The refusal
Information is gateway after the information of the layer, sync grade of the base station is sent to adjacent base station, receives refusing for adjacent base station reply
The information sent when exhausted information.
Further, the first processing units 72 are used for:
It is described refusal information in comprising conflict adjacent base station information when, select adjacent base station indicated by the information as
Synchronisation source；Alternatively,
Adjacent cell signal is searched for, selects the base station where the elementary adjacent cell of the layer, sync searched as synchronization
Source.
Further, the first processing units 72 are used for:
The layer, sync grade of the base station is re-set as to the layer, sync grade of one grade than minimum layer, sync higher grade.
Referring to Fig. 8, the embodiment of the present invention provides a kind of base station, which includes:
Receiving unit 80, for receiving the configuration information comprising layer, sync grade of gateway transmission；
Synchronization unit 81, for itself layer, sync grade to be arranged according to the configuration information；If the layer, sync of the base station
Grade is not minimum layer, sync grade, it is determined that synchronisation source, and realize synchronous with the synchronisation source.
Further, the receiving unit 80 is used for:
After base station is linked into network, the configuration information comprising layer, sync grade of gateway transmission is received；Alternatively,
After not searching effective synchronisation source, synchronization level request message is sent to gateway；Receive gateway
The configuration information comprising layer, sync grade returned.
Further, the base station further include:
Updating unit 82, the reconfiguration information sent after network deployment changes for receiving gateway, should
It include updated layer, sync grade in reconfiguration information；
The layer, sync grade of itself is reset according to the reconfiguration information；If the layer, sync of the base station after resetting
Grade is not minimum layer, sync grade, then redefines synchronisation source, and realize synchronous with the synchronisation source.
Further, the synchronization unit 81 is used for:
When also including information of adjacent cells in the configuration information, determine that layer, sync grade is minimum according to the information of adjacent cells
Adjacent cell where base station, using determining base station as synchronisation source；Alternatively,
Adjacent cell signal is searched for, selects the base station where the elementary adjacent cell of the layer, sync searched as synchronization
Source.
Referring to Fig. 9, the embodiment of the present invention provides a kind of base station, which includes:
Reporting unit 90, in the location information for reporting the base station into the registration process of maintenance and management entity OAM；
Receiving unit 91, the configuration information of the layer, sync class information comprising adjacent base station for receiving OAM return；It is described
Adjacent base station is the elementary adjacent base station of layer, sync for the base station that OAM is determined according to the location information of the base station；
Synchronization unit 92, for according to the layer, sync class information of the adjacent base station search for synchronisation source, and with the synchronisation source
It synchronizes.
Further, which further comprises:
Indicating unit 93, for it is synchronous with the synchronisation source successfully when, to OAM return include the synchronisation source information
Synchronize and successfully indicate；
In the synchronization failure with the synchronisation source, the synchronization failure instruction of the information comprising the synchronisation source is returned to OAM,
And the configuration information for the layer, sync class information comprising the adjacent base station redefined that OAM is returned to is received, according to again true
The layer, sync class information of fixed adjacent base station re-searches for synchronisation source, and synchronizes with the synchronisation source re-searched for.
Further, which further comprises:
Updating unit 94, the configuration information retransmitted after network deployment changes for receiving OAM, this sends out again
Comprising the layer, sync class information of the adjacent base station redefined in the configuration information sent；According to the synchronization of the adjacent base station redefined
Layer class information re-searches for synchronisation source, and synchronizes with the synchronisation source re-searched for；
If synchronizing success, return to OAM and successfully indicate, and the layer, sync grade ratio for resetting the base station re-searches for
The high level-one of layer, sync grade of the synchronisation source arrived；If synchronization failure, current layer, sync grade is kept, and send together to OAM
The instruction that step layer grade remains unchanged.
Referring to Figure 10, the embodiment of the present invention provides a kind of gateway, which includes:
Receiving unit 101, the information of the layer, sync grade of the base station for receiving base station transmission；
Feedback unit 102, for determining whether the layer, sync grade of the base station conflicts with the layer, sync grade of adjacent base station, and
Feedback information is returned to base station according to definitive result.
Further, the feedback unit 102 is used for:
If determining the layer, sync grade of the base station not according to the synchronization stratum information and information of adjacent cells of all base stations of storage
Conflict with the layer, sync grade of adjacent base station, then returns to confirmation message to base station；If being believed according to the layer, sync of all base stations of storage
Breath and information of adjacent cells, the layer, sync grade for determining the base station conflict with the layer, sync grade of adjacent base station, then return and refuse to base station
Exhausted information；Alternatively,
After the information of the layer, sync grade of the base station is sent to adjacent base station, if receiving the confirmation message of adjacent base station reply
Or do not receive the reply of adjacent base station within the set duration, then confirmation message is returned to base station；If receiving adjacent base station reply
Refuse information, then returns to refusal information to base station.
Referring to Figure 11, the embodiment of the present invention provides a kind of gateway, which includes:
Determination unit 111, for determining the layer, sync grade of base station；
Transmission unit 112, for will include that the configuration information of the layer, sync grade is sent to base station.
Further, the transmission unit 112 is used for:
After base station is linked into network, the configuration information comprising the layer, sync grade is sent to base station；Alternatively,
It, will be comprising described after the synchronization level request message sent when receiving base station and not searching effective synchronisation source
The configuration information of layer, sync grade is sent to base station.
Further, the gateway further include:
Unit 113 is reconfigured, for sending reconfiguration information, the reconfiguration confidence to base station after network deployment changes
It include updated layer, sync grade in breath.
Referring to Figure 12, the embodiment of the present invention provides a kind of maintenance and management entity OAM, which includes:
Receiving unit 121, for receiving the location information for the base station that base station reports in registration process；
Configuration unit 122 determines the elementary adjacent base of layer, sync of the base station for the location information according to the base station
It stands, and the configuration information of the layer, sync class information comprising the adjacent base station is sent to the base station.
Further, the OAM further include:
Processing unit 123, for receive base station transmission the information comprising synchronisation source synchronize successfully indicate when, root
The layer, sync grade for successfully indicating to determine and store the base station is synchronized according to this；
In the synchronization failure instruction for receiving the information comprising synchronisation source of base station transmission, believed according to the position of the base station
Breath redefines an adjacent base station of the base station, and the layer, sync class information comprising the adjacent base station redefined is matched confidence
Breath is sent to the base station.
Further, the OAM further include:
Unit 124 is reconfigured, for redefining this according to the location information of the base station after network deployment changes
One adjacent base station of base station, and the configuration information of the layer, sync class information comprising the adjacent base station redefined is sent to the base
It stands.
To sum up, the beneficial effect comprise that
In the first base station synchronization scheme provided in an embodiment of the present invention, base station after not searching effective synchronisation source,
Set minimum layer, sync grade for the layer, sync grade of the base station, and determine the base station layer, sync grade whether with adjacent base station
Layer, sync grade conflict；If conflict, resets the layer, sync grade of the base station, and selects the adjacent base station of conflict as same
Step source is realized synchronous with the synchronisation source；If not conflicting, the layer, sync grade of the base station is fixed as minimum layer, sync etc.
Grade, so that adjacent base station is synchronized with the base station, it is seen then that this programme automatically adjusts layer, sync grade, solution by base station distribution formula
It has determined base station the problem of how being synchronized when not searching effective synchronisation source.
In second of base station synchronization scheme provided in an embodiment of the present invention, what base station received gateway transmission includes to synchronize
The configuration information of layer grade, the layer, sync grade of itself is arranged according to the configuration information；If the layer, sync grade of the base station is not
Minimum layer, sync grade, it is determined that synchronisation source, and realize synchronous with the synchronisation source.As it can be seen that this programme by gateway to
Base station indicates its layer, sync grade, and base station is synchronized according to the layer, sync grade of instruction, to solve how base station carries out
Synchronous problem.
In the third base station synchronization scheme provided in an embodiment of the present invention, base station reports this in the registration process to OAM
The location information of base station receives the configuration information for the layer, sync class information comprising adjacent base station that OAM is returned, according to the adjacent base station
Layer, sync class information search for synchronisation source, and synchronized with the synchronisation source.As it can be seen that this programme is indicated by OAM to base station
The layer, sync grade of synchronisation source, base station according to the layer, sync hierarchical search synchronisation source of instruction to synchronize, to solve base
It stands the problem of how synchronizing.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of method of base station synchronization, which is characterized in that this method comprises:
Base station receives the configuration information comprising layer, sync grade of gateway transmission；
The layer, sync grade of itself is arranged according to the configuration information for base station；If the layer, sync grade of the base station is not minimum synchronization
Layer grade, it is determined that synchronisation source, and realize synchronous with the synchronisation source；
Wherein, the base station receives the configuration information comprising layer, sync grade of gateway transmission, specifically includes:
Base station receives the configuration information comprising layer, sync grade of gateway transmission after being linked into network；Alternatively,
Base station sends synchronization level request message after not searching effective synchronisation source, to gateway；Receive gateway
The configuration information comprising layer, sync grade returned.
2. the method as described in claim 1, which is characterized in that after base station receives the configuration information, further comprise:
Base station receives the reconfiguration information that gateway is sent after network deployment changes, and includes in the reconfiguration information
Updated layer, sync grade；
Base station resets the layer, sync grade of itself according to the reconfiguration information；If the layer, sync of the base station after resetting
Grade is not minimum layer, sync grade, then redefines synchronisation source, and realize synchronous with the synchronisation source.
3. the method as described in claim 1, which is characterized in that the determining synchronisation source specifically includes:
When also including information of adjacent cells in the configuration information, the elementary neighbour of layer, sync is determined according to the information of adjacent cells
Base station where cell, using determining base station as synchronisation source；Alternatively,
Adjacent cell signal is searched for, selects the base station where the elementary adjacent cell of the layer, sync searched as synchronisation source.
4. a kind of synchronizing information feedback method, which is characterized in that this method comprises:
Gateway determines the layer, sync grade of base station；
Configuration information comprising the layer, sync grade is sent to base station by gateway；
Wherein, the configuration information comprising the layer, sync grade is sent to base station by the gateway, is specifically included:
After gateway is linked into network in base station, the configuration information comprising the layer, sync grade is sent to base station；Alternatively,
After the synchronization level request message that gateway is sent when receiving base station and not searching effective synchronisation source, will include
The configuration information of the layer, sync grade is sent to base station.
5. method as claimed in claim 4, which is characterized in that confidence will be matched comprising the layer, sync grade in gateway
Breath is sent to after base station, further comprises:
Gateway sends reconfiguration information to base station after network deployment changes, and includes after updating in the reconfiguration information
Layer, sync grade.
6. a kind of base station, which is characterized in that the base station includes:
Receiving unit, for receiving the configuration information comprising layer, sync grade of gateway transmission；
Synchronization unit, for itself layer, sync grade to be arranged according to the configuration information；If the layer, sync grade of the base station is not
For minimum layer, sync grade, it is determined that synchronisation source, and realize synchronous with the synchronisation source；
Wherein, the receiving unit is used for:
After base station is linked into network, the configuration information comprising layer, sync grade of gateway transmission is received；Alternatively,
After not searching effective synchronisation source, synchronization level request message is sent to gateway；Gateway is received to return
The configuration information comprising layer, sync grade.
7. base station as claimed in claim 6, which is characterized in that the base station further include:
Updating unit, the reconfiguration information sent after network deployment changes for receiving gateway, this is reconfigured
It include updated layer, sync grade in information；
The layer, sync grade of itself is reset according to the reconfiguration information；If the layer, sync grade of the base station after resetting
It is not minimum layer, sync grade, then redefines synchronisation source, and realize synchronous with the synchronisation source.
8. base station as claimed in claim 6, which is characterized in that the synchronization unit is used for:
When also including information of adjacent cells in the configuration information, the elementary neighbour of layer, sync is determined according to the information of adjacent cells
Base station where cell, using determining base station as synchronisation source；Alternatively,
Adjacent cell signal is searched for, selects the base station where the elementary adjacent cell of the layer, sync searched as synchronisation source.
9. a kind of gateway, which is characterized in that the gateway includes:
Determination unit, for determining the layer, sync grade of base station；
Transmission unit, for will include that the configuration information of the layer, sync grade is sent to base station；
Wherein, the transmission unit is used for:
After base station is linked into network, the configuration information comprising the layer, sync grade is sent to base station；Alternatively,
It will include the synchronization after the synchronization level request message sent when receiving base station and not searching effective synchronisation source
The configuration information of layer grade is sent to base station.
10. gateway as claimed in claim 9, which is characterized in that the gateway further include:
Unit is reconfigured, for sending reconfiguration information to base station after network deployment changes, is wrapped in the reconfiguration information
Containing updated layer, sync grade.
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| CN108513725B (en) * | 2017-09-28 | 2020-10-27 | 香港应用科技研究院有限公司 | System and method for synchronization signal time slot reselection for selecting synchronization target in network |
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