CN102440031A - Clock synchronization method and device - Google Patents
Clock synchronization method and device Download PDFInfo
- Publication number
- CN102440031A CN102440031A CN2011800005137A CN201180000513A CN102440031A CN 102440031 A CN102440031 A CN 102440031A CN 2011800005137 A CN2011800005137 A CN 2011800005137A CN 201180000513 A CN201180000513 A CN 201180000513A CN 102440031 A CN102440031 A CN 102440031A
- Authority
- CN
- China
- Prior art keywords
- clock
- clock synchronization
- access point
- synchronization level
- femto
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G7/00—Synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0641—Change of the master or reference, e.g. take-over or failure of the master
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the invention provides a clock synchronization method and a clock synchronization device. The method comprises the steps of broadcasting the clock synchronization level of a Femto lower access point AP in a system broadcast message of a miniature base station Femto; using the AP adjacent to the access point AP to take the AP having a higher clock synchronization level as a clock synchronization source to thereby finish the clock synchronization of the clock synchronization source. The embodiment enables the AP to form a best clock synchronization network by a self-organizing thinking and in various complicated scenes, maintaining the plug and play and configuration-free characteristics of the AP, and reducing the system maintenance working capacity.
Description
Technical field
The present invention relates to network communication field, more particularly to a kind of synchronous method and device of clock.
Background of invention
At present, the enterprise-level Femto method of synchronization typically has：GPS, 1588V2 and air interface synchronization.By the synchronization between air interface synchronization macro network, or clock synchronization Femto equipment, Femto here refers to that family covers solution in a broad sense, except including access point（Access
Point, AP）Outside, include some miscellaneous equipments of the integrated control of network side, enterprise-level Femto air interface synchronizations are related to the synchronisation source select permeability between many AP, in fact it could happen that scene include：
1）All AP can detect macro station signal；
2）Part AP can detect macro station signal, and remaining AP can not detect macro station signal；
Include again under this scene：The AP of macro station signal, which can not be detected, can detect other AP of same enterprise；The AP of macro station signal, which can not be detected, can not also detect other AP of same enterprise, and enterprises have multiple discontinuous AP areas of coverage；
3）All AP can not detect macro station signal.
And clock it is synchronous to be deployed with family's acnode coverage mode, the continuous coverage mode of the discontinuous coverage mode of enterprise and enterprise etc. several；Synchronous implementation has several individual mode or the combinations such as the clock synchronization and free oscillation between GPS synchronizations, synchronous macro network clock, the synchronization of 1588V2 clocks, Femto access points AP.In the prior art at present, for some or all of Femto under above-mentioned second, third kind of scene can not synchronous macro network in the case of, it is necessary to by manually being intervened, pass through AP management servers（APM）To configure the method for synchronization specified, this clock allowed between AP synchronously becomes complicated, AP plug and play, configuration feature of exempting from receive great challenge, once AP resets, failure or wireless environment variation, it is accomplished by re-starting configuration, very big workload is brought to maintenance work, also there is the risk safeguarded not in time.
The content of the invention
The embodiments of the invention provide a kind of synchronous method and device of clock, by the thought of self-organizing, in various complicated scenes, AP is set to automatically form an optimal clock synchronous network network, keep AP plug and play and exempt from configuration feature, reduce system maintenance work amount.
The embodiments of the invention provide a kind of synchronous method of clock, methods described includes：
The clock synchronization level of access point AP under the Femto is broadcasted in femto cell Femto system broadcast message；
The AP adjacent with described access point AP as clock synchronisation source, completes the higher AP of received clock synchronization level synchronous with the clock of the synchronisation source.
The embodiment of the present invention additionally provides a kind of synchronous device of clock, and described device includes：
Clock synchronization level radio unit, the clock synchronization level for broadcasting access point AP under the Femto in femto cell Femto system broadcast message；
Synchronisation source selecting unit, for the higher AP of received clock synchronization level, as clock synchronisation source, to be completed synchronous with the clock of the synchronisation source.
Methods described broadcasts the clock synchronization level of access point AP under the Femto in femto cell Femto system broadcast message it can be seen from above-mentioned provided technical scheme；The AP adjacent with described access point AP as clock synchronisation source, completes the higher AP of received clock synchronization level synchronous with the clock of the synchronisation source.The present embodiment in various complicated scenes, makes AP automatically form an optimal clock synchronous network network by the thought of self-organizing, keeps AP plug and play and exempts from configuration feature, reduces system maintenance work amount.
Brief Description Of Drawings
Fig. 1 is provided the schematic flow sheet of clock synchronizing method by the embodiment of the present invention；
Fig. 2 is provided the structural representation of clock synchronization apparatus by the embodiment of the present invention.
Implement the mode of the present invention
The embodiments of the invention provide a kind of synchronous method and device of clock, because enterprise-level AP overlay area in blocks is generally the AP of same equipment vendor.So can be using this facility, using UE Optional Field is not influenceed in the system broadcast message of Femto cells, to broadcast this AP clock synchronization level；Adjacent AP clock synchronization information can be parsed between AP simultaneously, optimal AP is selected as synchronisation source, so as to build optimal clock synchronizing network.
In specific implementation process, the situation that enterprise continuously covers can cover other several scenes.Such as：Acnode covering is considered as detecting macro station in continuous covering and can't detect two kinds of situations of macro station；Each panel region of the discontinuous covering of enterprise can be acnode or continuous overlay area, so the scene that the embodiment of the present invention can continuously be covered with selective analysis enterprise.
For preferably description embodiment of the present invention, the embodiment of the present invention is illustrated in conjunction with accompanying drawing, the schematic flow sheet of clock synchronizing method is provided by the embodiment of the present invention as shown in Figure 1, methods described includes：
Step 11：The clock synchronization level of access point AP under Femto is broadcasted in femto cell Femto system broadcast message.
In this step, first, it is synchronous that access point AP selection synchronisation sources under femto cell Femto enter row clock, access point AP clock synchronization level is broadcasted again, the clock synchronization level information can be specifically broadcasted using user terminal UE Optional Field is not influenceed in femto cell Femto system broadcast message, three kinds of situations can be divided into implementing：
1）If access point AP can detect macro station, synchronous macro station, and broadcast should access point AP clock synchronization level be 1 grade, it is assumed here that the clock synchronization level of macro station is 0 grade, is recognized by frequency range；
2）If access point AP can not detect macro station, then selection clock synchronization level highest AP is synchronized as synchronisation source, and the clock synchronization level that access point AP clock synchronization level is arranged to the synchronisation source plus 1, then broadcast access point AP clock synchronization level.
Wherein, the selection clock synchronization level highest AP as synchronisation source synchronize including：The AP that clock source is macro network, or clock source is selected to be synchronized for the AP of self-vibration as synchronisation source.
If in addition, in the selection process, clock synchronization level identical target AP has multiple, then the preceding target AP prioritizing selections of selection, the i.e. priority class of traffic can be ranked up according to the priority class of traffic.
3）If access point AP can't detect macro station, other AP are also can't detect, then using the free oscillation clock of itself, and broadcast access point AP clock synchronization level is M grades.
For example, by taking the first above-mentioned situation as an example, if access point AP can detect macro station, access point AP synchronous flow is：
1）Macro station synchronisation source is determined by initial ranging.
2）This AP synchronisation source is reported to be macro station and macro station ID to AP management servers APM.
3）Calculating is eated dishes without rice or wine propagation delay T_delay：
Here, the mode for calculating the propagation delay T_delay that eats dishes without rice or wine includes two kinds of situations：
The first situation：When access point AP starts shooting or during without service bearer：
I. AP is according to the path loss of macro station to AP, and oneself estimates propagation delay of eating dishes without rice or wine；
Ii. obtained by initiating multi-upstream access；
Second of situation：When AP has service bearer：
Iii. the UE that AP is controlled to oneself issues the observed time difference SFN-SFN between AP and synchronisation source to measure, SFN-SFN
Observed time difference is that two access points (the serving cell and Target cell) frame measured on UE receives the difference of time, during expression in units of chip.
If iv. UE can not report the observed time difference with macro station, after business release, synchronized algorithm during without service bearer is carried out.
4）In AP it was observed that synchronisation source downlink frame initial time on the basis of, by AP timing adjust T_delay forward.
When there is UE to access AP, it is contemplated that UE uplink synchronous demand, many successive steps need to be divided during AP adjustment clocks.
5）AP also needs to computation of Period time delay, and adjusts AP itself clocks according to result of calculation, repeats 3~4 times, and the cycle can be second level or minute level.
The AP of macro station can not be detected in the case of the situation of macro station, second and can be synchronized to the AP for being synchronized to macro station by examples above describing access point AP and detecting, specifically：
The adjacent AP that can be detected is reported to APM first, reselection clock synchronization level highest AP is used as synchronisation source, here the AP that clock source is the AP of macro network or clock source is self-vibration is included, if wherein having the target AP of multiple identical clock synchronization levels, according to priority class of traffic sequencing selection；
Then, the clock synchronization level that the synchronous AP of row clock broadcasts this AP again in its cell broadcast messages SIB Optional Field has been entered, the clock synchronization level of specially synchronisation source adds 1, to supply other AP as reference synchronization.
In the case of the third, if macro station can not be detected, the AP of other AP signals can not be detected, then can use the free oscillation clock of itself；Reported to APM, and its clock synchronization level is broadcasted for M in broadcast message., it is necessary to which an AP serves as source clock in the case that such case, which is mainly, is used in list AP or many AP, but all AP can't detect macro station, it is synchronous that other AP enter row clock to this AP again.
Step 12：The AP adjacent with access point AP as clock synchronisation source, completes the higher AP of received clock synchronization level synchronous with the clock of the synchronisation source.
In this step, after access point AP completes clock synchronization according to the operation of above-mentioned steps 11 and broadcasts this access point AP clock synchronization level, the AP adjacent with access point AP can just parse received clock synchronization level information, the higher AP of reselection clock synchronization level is used as corresponding clock synchronisation source, complete synchronous with the clock of the synchronisation source, so as to build optimal clock synchronous network network.
Pass through above-mentioned Clock Synchronization Procedure, it is possible to by the thought of self-organizing, in various complicated scenes, make to automatically form an optimal clock synchronous network network between AP and adjacent AP, keep AP plug and play and exempt from configuration feature, reduce system maintenance work amount.
In addition, methods described also includes：
It when access point AP enters row clock synchronized tracking, can be estimated with computation of Period and the propagation delay of synchronization object according to path loss, either pass through up presynchronization or SFN-SFN observing time difference measurements；After T_delay is obtained, this cell clock is adjusted, this T_delay needs the cycle to be calculated and corrected.
This access point AP clock synchronization level information, upper level clock synchronization level information reporting to APM can also be judged whether that there is the situation of the small net of multiple clocks same overlay area by access point AP by APM according to received information.If there is a situation where, there is the small net of multiple clocks same overlay area, indicates that the AP in closed loop reselects other upper level clock stations and enters row clock synchronization again in time by APM.
Further, since the synchronous number of plies often adds 1 between indoor propagation time delay is usually no more than 1 chip chip, AP, 1chip synchronous error may be caused, therefore 4 layers should be limited in for the number of plies synchronous between error, AP caused by propagation delay between lifting AP（4chip）Within.
In specific implementation process, in above-mentioned steps 11, AP enters the synchronous mode of row clock with synchronisation source to be included：
1）Multi-upstream access is initiated to synchronisation source, AP synchronization timing deviation is adjusted by synchronisation source, reaches that AP equipment is synchronous with the clock of synchronisation source.Synchronization timing deviation is propagation delay of the macro station to AP, and influence of the propagation delay to AP synchronous errors can be compensated by initiating uplink synchronous to macro station, improves the synchronous accuracy of AP.
2）Multi-upstream access is not initiated to synchronisation source, the downstream signal of synchronisation source is intercepted by AP,
AP is using the macro station DwPTS DwPTS delivery times received constantly as oneself.AP clock will propagation delay length more delayed than macro station under this mode.
In addition, can detect macro station in AP, during using macro station as synchronisation source, AP provides service to UE when doing air interface synchronization without normal direction macro station, and the UE under can also being controlled by AP do SFN-SFN observing time difference measurements, and the time difference reported by UE is come synchronous with macro station.
The embodiment of the present invention additionally provides a kind of synchronous device of clock, and the device is arranged on access point AP, is illustrated in figure 2 the structural representation of provided clock synchronization apparatus, described device includes：
Clock synchronization level radio unit 21, the clock synchronization level for broadcasting access point AP under the Femto in femto cell Femto system broadcast message.
Synchronisation source selecting unit 22, for the higher AP of received clock synchronization level, as clock synchronisation source, to be completed synchronous with the clock of the synchronisation source.
In addition, described device may also include：
Clock synchronization level reporting unit 23, for by access point AP clock synchronization level information and upper level clock synchronization level information reporting to AP management servers APM；
The small net processing unit 24 of clock source, for judging whether that there is the situation of the small net of multiple clock sources same overlay area according to the APM, reselects other upper level clock stations and synchronizes if notifying described access point AP in the presence of if.
Described device may also include：
Cycle adjusting unit 25, for described access point AP when entering row clock synchronized tracking, the propagation delay of computation of Period and target BS carries out the synchronous adjustment of this clock.
The process that implements of each unit is referred to described in above method embodiment in said apparatus.
It is worth noting that, in said apparatus embodiment, included unit is simply divided according to function logic, but is not limited to above-mentioned division, as long as corresponding function can be realized；In addition, the specific name of each functional unit is also only to facilitate mutually distinguish, the protection domain being not intended to limit the invention.
In addition, one of ordinary skill in the art will appreciate that realizing that all or part of step in above method embodiment can be by program to instruct the hardware of correlation to complete, corresponding program can be stored in a kind of computer-readable recording medium, storage medium mentioned above can be read-only storage, disk or CD etc..
In summary, the embodiment of the present invention in various complicated scenes, is made to automatically form an optimal clock synchronous network network between AP, keeps AP plug and play and exempt from configuration feature, reduce system maintenance work amount by the thought of self-organizing.
It is described above; preferably embodiment only of the invention; but protection scope of the present invention is not limited thereto; any one skilled in the art is in the technical scope that the embodiment of the present invention is disclosed; the change or replacement that can be readily occurred in, should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (13)
- A kind of synchronous method of clock, it is characterised in that methods described includes：The clock synchronization level of access point AP under the Femto is broadcasted in femto cell Femto system broadcast message；The AP adjacent with described access point AP as clock synchronisation source, completes the higher AP of received clock synchronization level synchronous with the clock of the synchronisation source.
- The method as described in claim 1, it is characterised in that access point AP clock synchronization level under the broadcast Femto, is specifically included：If the clock synchronization level that AP can detect macro station, synchronous macro station, and broadcast access point AP is 1 grade.
- The method as described in claim 1, it is characterised in that access point AP clock synchronization level under the broadcast Femto, is specifically included：If AP can not detect macro station, selection clock synchronization level highest AP is synchronized as synchronisation source, and plus 1 by the clock synchronization level that access point AP clock synchronization level is arranged to the synchronisation source, then broadcasts access point AP clock synchronization level.
- Method as claimed in claim 3, it is characterised in that the selection clock synchronization level highest AP is synchronized as synchronisation source, is specifically included：The AP that clock source is macro network, or clock source is selected to be synchronized for the AP of self-vibration as synchronisation source.
- Method as claimed in claim 3, it is characterised in that methods described also includes：If clock synchronization level identical target AP has multiple, selection is ranked up according to the priority class of traffic.
- The method as described in claim 1, it is characterised in that access point AP clock synchronization level under the broadcast Femto, is specifically included：If AP can't detect macro station, other AP are also can't detect, then using the free oscillation clock of itself, and broadcast access point AP clock synchronization level is M grades.
- The method as described in claim 1, it is characterised in that methods described also includes：By access point AP clock synchronization level information and upper level clock synchronization level information reporting to AP management servers APM；Judge whether that there is the situation of the small net of multiple clock sources same overlay area according to the APM, synchronized if reselecting other upper level clock stations in the presence of if.
- The method as described in claim 1, it is characterised in that methods described also includes：Described access point AP is when entering row clock synchronized tracking, and the propagation delay of computation of Period and target BS carries out the synchronous adjustment of this clock.
- The method as described in claim 1, it is characterised in that methods described also includes：Indoor propagation time delay is no more than 1 chip chip, and the number of plies synchronous between Femto is limited within 4 layers.
- The method as described in claim 1, it is characterised in that described in femto cell Femto system broadcast message, is specifically included：Being utilized in femto cell Femto system broadcast message does not influence user terminal UE Optional Field.
- The synchronous device of a kind of clock, it is characterised in that described device includes：Clock synchronization level radio unit, the clock synchronization level for broadcasting access point AP under the Femto in femto cell Femto system broadcast message；Synchronisation source selecting unit, for the higher AP of received clock synchronization level, as clock synchronisation source, to be completed synchronous with the clock of the synchronisation source.
- Device as claimed in claim 11, it is characterised in that described device also includes：Clock synchronization level reporting unit, for by access point AP clock synchronization level information and upper level clock synchronization level information reporting to AP management servers APM；The small net processing unit of clock source, for judging whether that there is the situation of the small net of multiple clock sources same overlay area according to the APM, reselects other upper level clock stations and synchronizes if notifying described access point AP in the presence of if.
- Device as claimed in claim 11, it is characterised in that described device also includes：Cycle adjusting unit, for described access point AP when entering row clock synchronized tracking, the propagation delay of computation of Period and target BS carries out the synchronous adjustment of this clock.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/074527 WO2011144066A2 (en) | 2011-05-23 | 2011-05-23 | Method and device for clock synchronization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102440031A true CN102440031A (en) | 2012-05-02 |
Family
ID=44992104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800005137A Pending CN102440031A (en) | 2011-05-23 | 2011-05-23 | Clock synchronization method and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102440031A (en) |
| WO (1) | WO2011144066A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112911552A (en) * | 2016-05-13 | 2021-06-04 | 华为技术有限公司 | Terminal synchronization method and terminal |
| CN116828586A (en) * | 2023-08-30 | 2023-09-29 | 芯迈微半导体(上海)有限公司 | Synchronization method and device for terminal in standby state |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104853427B (en) * | 2014-02-17 | 2018-07-24 | 中国移动通信集团公司 | A kind of Home eNodeB synchronous method and Home eNodeB |
| CN105453667B (en) * | 2014-06-30 | 2019-05-28 | 华为技术有限公司 | A kind of clock synchronizing method, system and relevant apparatus |
| CN114745680A (en) * | 2022-06-10 | 2022-07-12 | 广州世炬网络科技有限公司 | Wireless base station time synchronization method, device, equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420747A (en) * | 2008-11-12 | 2009-04-29 | 华为技术有限公司 | Synchronization method, base station, network server and communication system |
| CN101668333A (en) * | 2009-09-30 | 2010-03-10 | 华为技术有限公司 | Clock synchronization method and base station |
| WO2010027587A1 (en) * | 2008-09-04 | 2010-03-11 | Motorola, Inc. | Synchronization for femto-cell base stations |
| CN101867408A (en) * | 2009-04-14 | 2010-10-20 | 中国移动通信集团公司 | Air interface synchronization method and base station |
| CN101938824A (en) * | 2009-06-29 | 2011-01-05 | 中国移动通信集团公司 | Air interface synchronization method, equipment and system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100571115C (en) * | 2006-05-24 | 2009-12-16 | 华为技术有限公司 | A kind of method for synchronous and system |
| CN101448314B (en) * | 2008-12-18 | 2010-12-08 | 华为技术有限公司 | Method for realizing time synchronization between base stations as well as system and communication terminal therefor |
-
2011
- 2011-05-23 CN CN2011800005137A patent/CN102440031A/en active Pending
- 2011-05-23 WO PCT/CN2011/074527 patent/WO2011144066A2/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010027587A1 (en) * | 2008-09-04 | 2010-03-11 | Motorola, Inc. | Synchronization for femto-cell base stations |
| CN101420747A (en) * | 2008-11-12 | 2009-04-29 | 华为技术有限公司 | Synchronization method, base station, network server and communication system |
| CN101867408A (en) * | 2009-04-14 | 2010-10-20 | 中国移动通信集团公司 | Air interface synchronization method and base station |
| CN101938824A (en) * | 2009-06-29 | 2011-01-05 | 中国移动通信集团公司 | Air interface synchronization method, equipment and system |
| CN101668333A (en) * | 2009-09-30 | 2010-03-10 | 华为技术有限公司 | Clock synchronization method and base station |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112911552A (en) * | 2016-05-13 | 2021-06-04 | 华为技术有限公司 | Terminal synchronization method and terminal |
| CN112911552B (en) * | 2016-05-13 | 2022-08-26 | 华为技术有限公司 | Terminal synchronization method and terminal |
| US11452055B2 (en) | 2016-05-13 | 2022-09-20 | Huawei Technologies Co., Ltd. | Terminal synchronization method and terminal |
| US11844036B2 (en) | 2016-05-13 | 2023-12-12 | Huawei Technologies Co., Ltd. | Terminal synchronization method and terminal |
| CN116828586A (en) * | 2023-08-30 | 2023-09-29 | 芯迈微半导体(上海)有限公司 | Synchronization method and device for terminal in standby state |
| CN116828586B (en) * | 2023-08-30 | 2023-11-14 | 芯迈微半导体(上海)有限公司 | Synchronization method and device for terminal in standby state |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011144066A3 (en) | 2012-04-26 |
| WO2011144066A2 (en) | 2011-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101433483B1 (en) | Air interface synchronization method, apparatus and system | |
| EP2992715B1 (en) | Transmitting a synchronization indication | |
| CN102271391B (en) | Synchronous method and system are realized between femto cell | |
| US8477671B2 (en) | Communication method, system and network nodes in a low power communication network | |
| EP2410797B1 (en) | Air interface synchronization method and system for home nodeb | |
| CN101123468B (en) | A method and system for synchronizing air interface synchronization between base stations | |
| JP5035425B2 (en) | Radio base station, radio access network, communication control circuit, communication control program, and communication control method | |
| CN102440031A (en) | Clock synchronization method and device | |
| CN101292547A (en) | Method and apparatus for synchronizing a node within an ad-hoc communication system | |
| JP2015092710A (en) | Minimizing impact of self-synchronization on wireless communication devices | |
| TW200421750A (en) | Method and apparatus for synchronizing base stations | |
| JP2005517340A5 (en) | ||
| US20120106751A1 (en) | Methods and apparatus for wireless microphone synchronization | |
| EP3099124B1 (en) | Cellular network synchronization methods and apparatus under separation architecture | |
| US20130003716A1 (en) | Compact base station apparatus and frame timing difference information acquiring method | |
| CN104469928B (en) | A kind of air interface synchronization method and device based on network intercepting | |
| CN104853427B (en) | A kind of Home eNodeB synchronous method and Home eNodeB | |
| CN103957592B (en) | Implementing method and device for time synchronization between femtocells | |
| WO2017028043A1 (en) | Synchronization method and device in communications network | |
| CN103516419B (en) | A kind of method and device for dispatching air interface synchronization subframe | |
| TW202044907A (en) | Low-power wireless mesh network | |
| CN106162858B (en) | Directintermination time synchronization method and device | |
| WO2019137293A1 (en) | Method and device for synchronization between base stations | |
| WO2014146601A1 (en) | Timing synchronization method and small base station | |
| CN102340861A (en) | Air interface synchronizing method between Femto device and macro station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120502 |