CN104853428B - The method and device of air interface synchronization, communication network element - Google Patents
The method and device of air interface synchronization, communication network element Download PDFInfo
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Abstract
The invention discloses a kind of method and devices of air interface synchronization, communication network element, wherein, the described method includes: network element to be synchronized listens to the broadcast message and system message of more than one network element of different operator, and frame synchronization is carried out with first network element in one above network element；The system message of first network element is listened to, the synchronization levels and/or Synchronization Status Message of first network element are obtained；When the network element to be synchronized determines that itself need to be synchronized based on the synchronization levels and/or Synchronization Status Message of first network element, the simultaneously operating with first network element is initiated, it is synchronous with first network element.Air interface synchronization can not be completed in the case where solving the problems, such as to lack between different operator the backhaul interfaces such as S1 based on existing backhaul signaling (S1signaling), synchronization accuracy is high.
Description
Technical field
The present invention relates to base station synchronization technology between different operator more particularly to a kind of method and device of air interface synchronization, lead to
Believe network element.
Background technique
In order to inhibit the inter base station interference of time division duplex (TDD, Time Division Duplexing) operator, with frequency
The base station TDD of deployment carries out a Time and Frequency Synchronization of standing.Presently, there are three kinds of Time and Frequency Synchronization schemes: (1) being led based on global satellite
Navigate positioning system (GNSS, Global Navigation Satellite System) satellite synchronization, such as global positioning system
(GPS, Global Positioning System) is synchronous；(2) ideal backhaul Network Synchronization, such as IEEE1588v2 are based on
It is synchronous；(3) air interface synchronization (radio-interface based synchronization mechanism).Indoors, high building
In long term evolutions (LTE, Long Term Evolution) the system typical case scenes such as hot spot covering, GPS signal is not easy to obtain
It takes, while the ideal backhaul of IEEE1588v2 synchronization mechanism is difficult to ensure, therefore cell (Small cell) enhancing master
Consider air interface synchronization technology.
Currently, 3GPP pays close attention to the air interface synchronization technology of network intercepting (network listening), basic principle
Be: base station (referred to as target BS) to be synchronized listens to reference signal (RS, the Reference for having synchronized base station (referred to as source base station)
Signal), local clock is adjusted, accordingly to maintain Time and Frequency Synchronization between station.
Existing air interface synchronization technical solution is mainly that TDD uplink-downlink (UL-DL) time slot solved within operator is done
Problem is disturbed, demand synchronous between operator is not accounted for.But 4G LTE commercial stage has been arrived, different TD-LTE operators
Respective TD-LTE network may be disposed jointly in identical geographic area, the TDD frequency spectrum distribution of different operators may be adjacent
Frequency division matches (being not excluded for the case where same frequency division is matched), if the TD-LTE network between operator is asynchronous, it will lead to different TDD
The uplink and downlink interference at crossed slot that network generates between operator.
In view of the above-mentioned problems, there has been no effective solution schemes at present.
Summary of the invention
The embodiment of the present invention in order to solve the above technical problems, provide a kind of method and device of air interface synchronization, communication network element,
The precise synchronization being able to achieve between the base station of different operator.
The technical solution of the embodiment of the present invention is achieved in that
A kind of method of air interface synchronization, comprising:
Network element to be synchronized listens to the broadcast message and system message of more than one network element of different operator, and with it is one
First network element in the above network element carries out frame synchronization；
The system message of first network element is listened to, the synchronization levels and/or synchronous regime letter of first network element are obtained
Breath；
The network element to be synchronized determines that itself is needed together based on the synchronization levels and/or Synchronization Status Message of first network element
When step, the simultaneously operating with first network element is initiated, it is synchronous with first network element.
Preferably, the method also includes:
Synchronization levels and/or Synchronization Status Message are carried in system information block SIB；
Accordingly, the broadcast message and system message for listening to first network element obtains the same of first network element
Walk rank and/or Synchronization Status Message, comprising:
The network element to be synchronized listens to the SIB in the system message of first network element, obtains the same of first network element
Walk rank and/or Synchronization Status Message.
Preferably, the method also includes:
Synchronization levels and/or Synchronization Status Message are carried in one SIB1 of system information block；
Accordingly, the system message for listening to first network element, obtain first network element synchronization levels and/or
Synchronization Status Message, comprising:
The network element to be synchronized listens to the SIB1 in the system message of first network element, obtains the same of first network element
Walk rank and/or Synchronization Status Message.
Preferably, the simultaneously operating of the initiation and first network element, it is synchronous with first network element, comprising:
Synchronization levels and/or synchronous shape of the network element to be synchronized according to first network element got in system information
State determines itself synchronization levels and/or Synchronization Status Message.
Preferably, when the synchronization levels and/or Synchronization Status Message for obtaining first network element, the method is also wrapped
It includes:
The network element to be synchronized obtains the random access configuration information for being linked into first network element；
The simultaneously operating of the initiation and first network element, it is synchronous with first network element, comprising:
The simultaneously operating with first network element is initiated based on the random access configuration information, it is same with first network element
Step.
Preferably, the random access configuration information includes: the configuration information of the random access scrambler sequence of the first network element
And the transmission power information of the accidental access signal；
Accordingly, the simultaneously operating initiated based on the random access configuration information with first network element, with institute
It is synchronous to state the first network element, comprising:
The network element to be synchronized is with the configuration information of the random access scrambler sequence and the transmitting function of accidental access signal
Rate sends random access request signal to first network element, and receives first network element and believed according to the random access request
Number determining Timing Advance, based on the timing error of Timing Advance compensation and first network element, complete with it is described
The synchronization of first network element.
Preferably, when the network element to be synchronized is not configured with the client identification module SIM card of the first network element operator,
Configuration is exclusively used in the synchronous scrambler sequence of the first network element；
It is described random when the network element configuration to be synchronized has the client identification module SIM card of the first network element operator
Access scrambler sequence random arrangement from scheduled scrambler sequence set.
A kind of device of air interface synchronization, including first listen to unit, the first synchronization unit, second listen to unit, obtain it is single
Member, determination unit and synchronous initiation unit；Wherein:
First listens to unit, for listening to the broadcast message and system message of more than one network element of different operator；
First synchronization unit, for listened to based on described first unit intercepted result and one above network element in
One the first network element carries out frame synchronization；
Second listens to unit, for listening to the system message of first network element；
Acquiring unit, the intercepted result for listening to unit based on described second obtain the synchronization levels of first network element
And/or Synchronization Status Message；
Determination unit, for based on first network element synchronization levels and/or Synchronization Status Message determine net to be synchronized
When member need to synchronize, synchronous initiation unit is triggered；
It is synchronous to initiate unit, for initiating and the simultaneously operating of first network element, make the network element to be synchronized with it is described
First network element is synchronous.
Preferably, described device further include:
First load bearing unit, for synchronization levels and/or Synchronization Status Message to be carried in system information block SIB；
Accordingly, described second unit is listened to, is also used to listen to the SIB in the system message of first network element, obtained
The synchronization levels and/or Synchronization Status Message of first network element.
Preferably, described device further include:
Second load bearing unit, for synchronization levels and/or Synchronization Status Message to be carried in one SIB1 of system information block；
Accordingly, described second unit is listened to, is also used to listen to the SIB1 in the system message of first network element, obtained
The synchronization levels and/or Synchronization Status Message of first network element.
Preferably, the synchronous initiation unit, is also used to according to the same of first network element got in system information
Rank and/or synchronous regime are walked, determines the synchronization levels and/or Synchronization Status Message of the network element to be synchronized.
Preferably, the acquiring unit is when obtaining the synchronization levels and/or Synchronization Status Message of first network element, also
Obtain the random access configuration information for being linked into first network element；
The synchronous initiation unit is also used to initiate based on the random access configuration information same with first network element
Step operation, it is synchronous with first network element.
Preferably, the random access configuration information includes: the configuration information of the random access scrambler sequence of the first network element
And the transmission power information of the accidental access signal；
Accordingly, it is described it is synchronous initiate unit, be also used to the configuration information of the random access scrambler sequence and random
The transmission power for accessing signal sends random access request signal to first network element, and receives first network element according to institute
State the Timing Advance that random access request signal determines, based on the Timing Advance compensate the network element to be synchronized with it is described
The timing error of first network element is completed synchronous with first network element.
Preferably, when the network element to be synchronized is not configured with the client identification module SIM card of the first network element operator,
Configuration is exclusively used in the synchronous scrambler sequence of the first network element；
It is described random when the network element configuration to be synchronized has the client identification module SIM card of the first network element operator
Access scrambler sequence random arrangement from scheduled scrambler sequence set.
A kind of communication network element, the device including air interface synchronization above-mentioned.
Preferably, the communication network element includes base station.
The embodiment of the present invention is efficiently solved can not in the case where lacking the backhaul interfaces such as S1 between different operator
The problem of completing air interface synchronization based on existing backhaul signaling (S1signaling)；The implementation complexity of the embodiment of the present invention
Influence low, to existing communication standard is small；SIM card of the embodiment of the present invention without configuring other side between different operators, can also
The random access between different operator need not be initiated；The embodiment of the present invention can also be on the basis of thick synchronous to Timing Advance
(TA, Timing Advance) is compensated, and improves precision slightly synchronous in air interface synchronization establishment process.
Detailed description of the invention
Fig. 1 is the flow chart of the method for the air interface synchronization of the embodiment of the present invention；
Fig. 2 is the flow chart of the method for the air interface synchronization of the embodiment of the present invention 1；
Fig. 3 is the composed structure schematic diagram of the device of the air interface synchronization of the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples and referring to attached drawing, right
The present invention is further described.
Fig. 1 is the flow chart of the method for the air interface synchronization of the embodiment of the present invention, as shown in Figure 1, the sky of the embodiment of the present invention
Mouthful synchronous method the following steps are included:
Step 101, network element to be synchronized listens to the broadcast message and system message of more than one network element of different operator, and with
First network element in one above network element carries out frame synchronization.
Cross operator synchronizes the middle determination that there are problems that a synchronous base base station, since operator 1 and operator 2 can be with
It monitors mutually, being not easy determination is that operator 1 is synchronized with operator 2 or operator 2 is synchronized with operator 1.Therefore, across operation
Quotient, which synchronizes, needs to know synchronization levels (stratum level) information.
In addition, if the synchronous base base station for the different operator monitored will lead to and work as itself is a asynchronous base station
More serious interference is generated between preceding network step-out and other synchronized operators.Therefore, cross operator it is synchronous it is necessary to
Know synchronous regime (synchronization status) information.
Since Backhaul interface being not present between the base station of cross operator, in order to support to eat dishes without rice or wine together between cross operator
Step, can increase by 1 rf reception module, so that it may eat dishes without rice or wine to supervise with the identity of the UE of operator 2 in the base station of operator 1
Listen operator 2, can detecte out uplink random access RACH process MSG3 before all information (such as primary synchronization signal (PSS)/
Secondary synchronization signal (SSS), Master Information Block (MIB)/system information block SIB, cell special reference (CRS) etc.), and obtain and determine
When lead TA complete closed loop synchronization establishment process, without other side operator authenticate；It especially can be convenient and read it
The SIB message of his operator.
In order to support the synchronization of cross operator, consider that the base station between cross operator is held in system message (SIB message)
Synchronizing information is carried and sends, present invention needs are configured as follows:
It is carried in SIB message and sends synchronization levels (stratum level) information；
And/or it is carried in SIB message and sends synchronous regime (synchronization status) information；
Stratum level information and/or synchronization status information are carried in SIB-1 message, and
It is carried in #5 work song frame and sends.It should be noted that by stratum level information and synchronization status
Information is carried in the SIB-1 of #5 work song frame, is a kind of preferred mode, the stratum level information of the embodiment of the present invention
As long as and/or synchronization status information is carried in SIB message and sends, it is not limited to SIB1,
SIB1 is a kind of preferred mode.Because SIB2~SIB13 etc. also needs the resource of SIB1 instruction scheduling, SIB1 is more just
In the quick detection for realizing cross operator.
The synchronizing information that the base station of the operator of step-out carries in the SIB message by monitoring other operator base stations, really
The synchronization levels of the synchronous base base station of other fixed operator base stations and/or Synchronization Status Message etc., and determine and update according to this
The synchronizing informations such as itself synchronization levels, synchronous regime；Complete the air interface synchronization establishment process between cross operator.
In this step, frame synchronization is thick synchronous.
Step 102, it listens to the system message of first network element, obtains the synchronization levels of first network element and/or same
Walk status information.
Specifically, by listening to SIB, the synchronization levels and/or Synchronization Status Message of the first network element are obtained.Above-mentioned SIB
Especially SIB1.
Step 103, the network element to be synchronized is determined based on the synchronization levels and/or Synchronization Status Message of first network element
When itself need to be synchronized, the simultaneously operating with first network element is initiated, it is synchronous with first network element.
Specifically, the network element to be synchronized according to the synchronization levels of first network element got in system information and/
Or synchronous regime, determine itself synchronization levels and/or Synchronization Status Message.
Alternatively, in a step 102, when the synchronization levels and/or Synchronization Status Message for obtaining first network element, also
Obtain the random access configuration information for being linked into first network element；
The simultaneously operating of the initiation and first network element, it is synchronous with first network element, it specifically includes:
The simultaneously operating with first network element is initiated based on the random access configuration information, it is same with first network element
Step.
The random access configuration information include: the random access scrambler sequence of the first network element configuration information and it is described with
The transmission power information of machine access signal；
Accordingly, the simultaneously operating initiated based on the random access configuration information with first network element, with institute
It is synchronous to state the first network element, comprising:
The network element to be synchronized is with the configuration information of the random access scrambler sequence and the transmitting function of accidental access signal
Rate sends random access request signal to first network element, and receives first network element and believed according to the random access request
Number determining Timing Advance, based on the timing error of Timing Advance compensation and first network element, complete with it is described
The synchronization of first network element
When the network element to be synchronized is not configured with the client identification module SIM card of the first network element operator, configuration
It is exclusively used in the synchronous scrambler sequence of the first network element；
When the network element configuration to be synchronized has the client identification module SIM card of the first network element operator, it is described with
Machine accesses scrambler sequence random arrangement from scheduled scrambler sequence set.
Below by way of specific example, the essence for technical solution that the present invention is furture elucidated.
Embodiment 1
Fig. 2 is the flow chart of the method for the air interface synchronization of the embodiment of the present invention 1, as shown in Fig. 2, this example is eated dishes without rice or wine for closed loop
The scheme of foundation is synchronized, operator 1 is not necessarily to configure the SIM card of operator 2, that is, does not need the authentication of operator 2.
Step 1: the base station to be synchronized of operator 1 is worked with the UE mode of operator 2, carries out eating dishes without rice or wine to listen to；Operator 1
Base station is not necessarily to configure the SIM card of operator 2.It is as follows specifically to listen to process:
The information such as the PSS/SSS/PBCH of several base stations of operator 2 are listened in the base station to be synchronized of operator 1, select a letter
Number strongest base station is as synchronous base base station；And obtain initial frame synchronization (thick synchronous)；
The SIB message of the synchronous base base station of operator 2 is listened in the base station to be synchronized of operator 1, obtains the same of operator 2
Walk the synchronizing information and PRACH configuration information of Reference BTS；
The base station to be synchronized of operator 1 updates certainly according to the synchronizing information of the synchronous base base station of the operator 2 listened to
The synchronizing information of body, such as stratum level, synchronization status etc..
Listen to the letter such as downlink reference signal (DLRS) of the synchronous base base station of operator 2 in the base station to be synchronized of operator 1
It ceases and determines that preamble sends power.
Step 2: initiating random access request to the synchronous base base station of operator 2 and obtain in the base station to be synchronized of operator 1
Take random access response (Msg1+Msg2).
A predefined specific preamble supports that cross operator is synchronous, to support non-SIM between cross operator base station
The synchronization of card.Since operator 1 does not configure the SIM card of operator 2 in embodiment 1, lead to that random access procedure can only be covered
MSG1+MSG2, the user authentication behavior of subsequent MSG3+MSG4 cannot be executed；If accessed using PRACH competition-based
Process, it is possible that the case where sending identical Preamble when the base station contention access of multiple operators 1, at this point, operator 1
Some base station obtain the corresponding TA of random access after, not can determine that this TA whether to itself.It is synchronous for cross operator
A reserved specific preamble can avoid the Preamble collision problem of contention access.
The process for initiating random access is as follows:
The base station to be synchronized of operator 1 according to the PRACH configuration that the synchronous base base station for eating dishes without rice or wine to listen to operator 2 determines with
And preamble transmission power sends out Preamble(MSG1 to the synchronous base base station of operator 2)；
The synchronous base base station of operator 2 determines Timing Advance (Timing Advance)；
To be synchronized base station feedback random access response (Random of the synchronous base base station of operator 2 to operator 1
Access Response), wherein including TA Timing Advance information (MSG2)；
Step 3: it is fixed that the base station to be synchronized of operator 1 is obtained according to the synchronous base base station random access response of operator 2
When lead, and adjust uplink timing complete air interface synchronization establishment process.
The base station to be synchronized of operator 1 obtains fixed from the received random access response in synchronous base base station of operator 2
When lead TA；
The base station to be synchronized of operator 1 is according to TA adjustment uplink timing and completes air interface synchronization foundation (TA compensation, containing propagation
Time delay etc.)
Embodiment 2
Closed loop air interface synchronization establishes scheme, and in this example, operator 1 need to configure the SIM card of operator 2, that is, need to run
The authentication of quotient 2.
Step 1: the base station to be synchronized of operator 1 is worked (SIM card of configuration operator 2) with the UE mode of operator 2, and
It carries out eating dishes without rice or wine to listen to；
The broadcast messages such as the PSS/SSS/PBCH of several base stations of operator 2 are listened in the base station to be synchronized of operator 1, select one
A strongest base station of signal is as synchronous base base station；And obtain initial frame synchronization (thick synchronous).
The SIB message of the synchronous base base station of operator 2 is listened in the base station to be synchronized of operator 1, obtains the same of operator 2
Walk the synchronizing information and Physical Random Access Channel (PRACH, Physical Random Access of Reference BTS
Channel) configuration information；
The base station to be synchronized of operator 1 updates certainly according to the synchronizing information of the synchronous base base station of the operator 2 listened to
The synchronizing information of body, such as stratum level, synchronization status etc..
It listens to the information such as the DL RS of synchronous base base station of operator 2 and determines preamble in the base station to be synchronized of operator 1
Send power.
Step 2: being initiated according to the behavior of the common UE of operator 2 to synchronous base base station the base station to be synchronized of operator 1
Random access request is simultaneously completed complete random access procedure (MSG1+MSG2+MSG3+MSG4), and detailed process is as follows:
The base station to be synchronized of operator 1 according to the PRACH configuration that the synchronous base base station for eating dishes without rice or wine to listen to operator 2 determines with
And preamble transmission power sends out Preamble(due to matching the base station to be synchronized of operator 1 to the synchronous base base station of operator 2
Preamble is sent out in the base station to be synchronized of the SIM card of Zhi Liao operator 2, operator 1 at random, because of the subsequent use for having MSG3+MSG4
Family act of authentication, so even if whens multiple base station PRACH contention access of operator 1 have sent identical preamble, can also
To be distinguished out by subsequent SIM card authentication, Preamble conflict will not occur) (MSG1)
The synchronous base base station of operator 2 determines Timing Advance (Timing Advance)；
To be synchronized base station feedback random access response (Random of the synchronous base base station of operator 2 to operator 1
Access Response), wherein including TA Timing Advance information (MSG2)；
The base station to be synchronized of operator 1 sends MSG3 to operator 2, carries user identifier (MSG3) in MSG3；
The synchronous base base station of operator 2 sends MSG4 to the base station to be synchronized of operator 1, and the user is confirmed in MSG4
It identifies (MSG4).
Step 3: the base station to be synchronized of operator 1 is determined according in the synchronous base base station random access response of operator 2
Timing advance TA, adjustment uplink timing complete air interface synchronization establishment process.
The base station to be synchronized of operator 1 uplink timing is adjusted according to the TA of acquisition and complete synchronous establishment process (TA is compensated,
Containing propagation delay etc.).
Embodiment 3
Open loop air interface synchronization establishes scheme, uncompensation TA, and the base station to be synchronized of operator 1 is not necessarily to configure the SIM of operator 2
Card, i.e., in synchronizing process, the base station to be synchronized of operator 1 does not need the authentication of operator 2.
Step 1: the base station to be synchronized of operator 1 is worked with the UE mode of operator 2, and carries out eating dishes without rice or wine to listen to, and is completed empty
The synchronous establishment process of mouth:
The broadcast messages such as the PSS/SSS/PBCH of several base stations of operator 2 are listened in the base station to be synchronized of operator 1, selection
One strongest base station of signal is as synchronous base base station；And it obtains initial frame synchronization and (only obtains thick synchronous, no TA compensation, together
The precision that step is established may be worse than closed loop policy).
The SIB message of the synchronous base base station of operator 2 is listened in the base station to be synchronized of operator 1, obtains the same of operator 2
Walk the synchronizing information of Reference BTS；
The base station to be synchronized of operator 1 updates certainly according to the synchronizing information of the synchronous base base station of the operator 2 listened to
The synchronizing information of body, such as stratum level, synchronization status etc..
In the embodiment of the present invention, air interface synchronization process be in fact divided into air interface synchronization establish (thick synchronous) and air interface synchronization with
Two big steps of track (essence synchronous), the emphasis of the embodiment of the present invention be solve first step, that is, air interface synchronization how
It establishes and completes the process slightly synchronized.
Although the technical solution of the embodiment of the present invention is proposed primarily directed to the synchronous scene of different operator and demand,
Technical solution itself can be applied to inter-operator and synchronize, and it is synchronous to can be used for intra-operator.
Fig. 3 is the composed structure schematic diagram of the device of the air interface synchronization of the embodiment of the present invention, as shown in figure 3, the present invention is real
The device for applying the air interface synchronization of example includes first listening to unit 30, the first synchronization unit 31, second listening to unit 32, acquiring unit
33, determination unit 34 and synchronous initiation unit 35；Wherein:
First listens to unit 30, for listening to the broadcast message and system message of more than one network element of different operator；
First synchronization unit 31, for listened to based on described first unit intercepted result and one above network element in
First network element carry out frame synchronization；
Second listens to unit 32, for listening to the system message of first network element；
Acquiring unit 33, the intercepted result for listening to unit based on described second obtain the synchronisation stage of first network element
Other and/or Synchronization Status Message；
Determination unit 34, for based on first network element synchronization levels and/or Synchronization Status Message determine it is to be synchronized
When network element need to synchronize, synchronous initiation unit is triggered；
It is synchronous to initiate unit 35, for initiating and the simultaneously operating of first network element, make the network element to be synchronized and institute
It is synchronous to state the first network element.
On the basis of device shown in Fig. 3, the device of different operator's air interface synchronization of the embodiment of the present invention further include:
First load bearing unit 36, for synchronization levels and/or Synchronization Status Message to be carried in system information block SIB；
Accordingly, described second unit 32 is listened to, is also used to listen to the SIB in the system message of first network element, obtains
Take the synchronization levels and/or Synchronization Status Message of first network element.
On the basis of device shown in Fig. 1, the device of different operator's air interface synchronization of the embodiment of the present invention further include:
Second load bearing unit 37, for synchronization levels and/or Synchronization Status Message to be carried on one SIB1 of system information block
In；
Accordingly, described second unit 32 is listened to, is also used to listen to the SIB1 in the system message of first network element, obtains
Take the synchronization levels and/or Synchronization Status Message of first network element.
It should be noted that the first load bearing unit 36 shown in Fig. 3 and the second load bearing unit 37 not realize that the present invention is real
The necessary processing unit of the device of Shi Liyi operator air interface synchronization is only the different operation more preferably to realize the embodiment of the present invention
The device of quotient's air interface synchronization and the technological means being additionally arranged.
Above-mentioned second load bearing unit 37 is also used to for synchronization levels and/or Synchronization Status Message being carried on the mark of SIB1
Number for 5 subframe in.
Above-mentioned synchronous initiation unit 35, is also used to the synchronization levels according to first network element got in system information
And/or synchronous regime, determine the synchronization levels and/or Synchronization Status Message of the network element to be synchronized.
Above-mentioned acquiring unit 33 is also obtained when obtaining the synchronization levels and/or Synchronization Status Message of first network element
It is linked into the random access configuration information of first network element；
Accordingly, it is above-mentioned it is synchronous initiate unit 35, be also used to initiate based on the random access configuration information and described the
The simultaneously operating of one network element, it is synchronous with first network element.
The random access configuration information include: the random access scrambler sequence of the first network element configuration information and it is described with
The transmission power information of machine access signal；
Accordingly, it is described it is synchronous initiate unit 35, be also used to the configuration information of the random access scrambler sequence and with
Machine access signal transmission power to first network element send random access request signal, and receive first network element according to
The Timing Advance that the random access request signal determines compensates the network element to be synchronized and institute based on the Timing Advance
The timing error of the first network element is stated, is completed synchronous with first network element
In the embodiment of the present invention, the network element to be synchronized is not configured with the client identification module of the first network element operator
When SIM card, configuration is exclusively used in the synchronous scrambler sequence of the first network element；
It is described random when the network element configuration to be synchronized has the client identification module SIM card of the first network element operator
Access scrambler sequence random arrangement from scheduled scrambler sequence set.
It will be appreciated by those skilled in the art that managing the realization of unit everywhere in the device of air interface synchronization shown in Fig. 3
Function can refer to the associated description of the method for aforementioned air interface synchronization and understand.It will be appreciated by those skilled in the art that shown in Fig. 3
The function of each processing unit can be realized and running on the program on processor in the device of air interface synchronization, can also be by specific
Logic circuit and realize.
The embodiment of the present invention also describes a kind of communication network element, the device including aforementioned air interface synchronization shown in Fig. 3.This is logical
Believe network element in particular base station.
It, in the absence of conflict, can be in any combination between technical solution documented by the embodiment of the present invention.
In several embodiments provided by the present invention, it should be understood that disclosed method, apparatus and electronic equipment,
It may be implemented in other ways.Apparatus embodiments described above are merely indicative, for example, the unit is drawn
Point, only a kind of logical function partition, there may be another division manner in actual implementation, such as: multiple units or components can
To combine, or it is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed
The mutual coupling of each component part or direct-coupling or communication connection can be through some interfaces, equipment or unit
Indirect coupling or communication connection can be electrical, mechanical or other forms.
Above-mentioned unit as illustrated by the separation member, which can be or may not be, to be physically separated, aobvious as unit
The component shown can be or may not be physical unit, it can and it is in one place, it may be distributed over multiple network lists
In member；Some or all of units can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated in one processing unit, it can also
To be each unit individually as a unit, can also be integrated in one unit with two or more units；It is above-mentioned
Integrated unit both can take the form of hardware realization, can also realize in the form of hardware adds application function unit.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned include: movable storage device, it is read-only
Memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or
The various media that can store program code such as person's CD.
If alternatively, the above-mentioned integrated unit of the embodiment of the present invention is realized in the form of applied function module and as independence
Product when selling or using, also can store in a computer readable storage medium.Based on this understanding, this hair
The technical solution of bright embodiment substantially in other words the part that contributes to existing technology can in the form of application product body
Reveal and, which is stored in a storage medium, including some instructions are with so that a computer is set
Standby (can be personal computer, server or network equipment etc.) executes the whole of each embodiment the method for the present invention
Or part.And storage medium above-mentioned include: movable storage device, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter.
Scope of protection of the present invention is not limited thereto, those familiar with the art the invention discloses skill
It within the scope of art, can easily think of the change or the replacement, should be covered by the protection scope of the present invention.
Claims (12)
1. a kind of method of air interface synchronization, which is characterized in that the described method includes:
Network element to be synchronized listens to the broadcast message and system message of more than one network element of different operator, and with it is one more than
First network element in network element carries out frame synchronization；
The system message of first network element is listened to, the synchronization levels and/or Synchronization Status Message of first network element are obtained；
Synchronization levels and/or Synchronization Status Message of the network element to be synchronized based on first network element are initiated and described first
The simultaneously operating of network element, it is synchronous with first network element；
Wherein, when the synchronization levels and/or Synchronization Status Message for obtaining first network element, the method also includes:
The network element to be synchronized obtains the random access configuration information for being linked into first network element；
The simultaneously operating of the initiation and first network element, it is synchronous with first network element, comprising:
The simultaneously operating with first network element is initiated based on the random access configuration information, it is synchronous with first network element；
Wherein, the random access configuration information includes: the configuration information of the random access scrambler sequence of the first network element and random
Access the transmission power information of signal；
Accordingly, it is described based on the random access configuration information initiate with the simultaneously operating of first network element, with described the
One network element is synchronous, comprising:
The network element to be synchronized with the transmission power of the configuration information of the random access scrambler sequence and accidental access signal to
First network element sends random access request signal, and it is true according to the random access request signal to receive first network element
Fixed Timing Advance is completed and described first based on the timing error of Timing Advance compensation and first network element
The synchronization of network element.
2. the method according to claim 1, wherein the method also includes:
Synchronization levels and/or Synchronization Status Message are carried in system information block SIB；
Accordingly, the system message for listening to first network element obtains the synchronization levels and/or synchronization of first network element
Status information, comprising:
The network element to be synchronized listens to the SIB in the system message of first network element, obtains the synchronisation stage of first network element
Other and/or Synchronization Status Message.
3. the method according to claim 1, wherein the method also includes:
Synchronization levels and/or Synchronization Status Message are carried in one SIB1 of system information block；
Accordingly, the system message for listening to first network element obtains the synchronization levels and/or synchronization of first network element
Status information, comprising:
The network element to be synchronized listens to the SIB1 in the system message of first network element, obtains the synchronisation stage of first network element
Other and/or Synchronization Status Message.
4. method according to any one of claims 1 to 3, which is characterized in that the initiation is same with first network element
Step operation, it is synchronous with first network element, comprising:
The network element to be synchronized according to the synchronization levels and/or synchronous regime of first network element got in system information,
Determine itself synchronization levels and/or Synchronization Status Message.
5. the method according to claim 1, wherein the network element to be synchronized is not configured with fortune belonging to the first network element
When seeking the client identification module SIM card of quotient, configuration is exclusively used in the synchronous scrambler sequence of the first network element；
When the network element configuration to be synchronized has the client identification module SIM card of the first network element operator, the random access
Scrambler sequence random arrangement from scheduled scrambler sequence set.
6. a kind of device of air interface synchronization, which is characterized in that described device includes first listening to unit, the first synchronization unit, the
Two listen to unit, acquiring unit, determination unit and synchronous initiation unit；Wherein:
First listens to unit, for listening to the broadcast message and system message of more than one network element of different operator；
First synchronization unit, one in intercepted result and one above network element for listening to unit based on described first
First network element carries out frame synchronization；
Second listens to unit, for listening to the system message of first network element；
Acquiring unit, the intercepted result for listening to unit based on described second obtain first network element synchronization levels and/
Or Synchronization Status Message；
Determination unit, for based on first network element synchronization levels and/or Synchronization Status Message determine that network element to be synchronized needs
When synchronous, synchronous initiation unit is triggered；
It is synchronous to initiate unit, for initiating and the simultaneously operating of first network element, make the network element to be synchronized and described first
Network element is synchronous；
Wherein, the acquiring unit is also obtained and is connect when obtaining the synchronization levels and/or Synchronization Status Message of first network element
Enter the random access configuration information to first network element；
The synchronous initiation unit, is also used to initiate behaviour synchronous with first network element based on the random access configuration information
Make, it is synchronous with first network element；
Wherein, the random access configuration information includes: the configuration information of the random access scrambler sequence of the first network element and random
Access the transmission power information of signal；
Accordingly, the synchronous initiation unit, is also used to the configuration information and random access of the random access scrambler sequence
The transmission power of signal to first network element send random access request signal, and receive first network element according to described in
The Timing Advance that machine access request signal determines compensates the network element to be synchronized and described first based on the Timing Advance
The timing error of network element is completed synchronous with first network element.
7. device according to claim 6, which is characterized in that described device further include:
First load bearing unit, for synchronization levels and/or Synchronization Status Message to be carried in system information block SIB；
Accordingly, described second unit is listened to, is also used to listen to the SIB in the system message of first network element, described in acquisition
The synchronization levels and/or Synchronization Status Message of first network element.
8. device according to claim 6, which is characterized in that described device further include:
Second load bearing unit, for synchronization levels and/or Synchronization Status Message to be carried in one SIB1 of system information block；
Accordingly, described second unit is listened to, is also used to listen to the SIB1 in the system message of first network element, described in acquisition
The synchronization levels and/or Synchronization Status Message of first network element.
9. according to the described in any item devices of claim 6 to 8, which is characterized in that the synchronous initiation unit is also used to basis
The synchronization levels and/or synchronous regime of first network element got in system information determine the same of the network element to be synchronized
Walk rank and/or Synchronization Status Message.
10. device according to claim 6, which is characterized in that the network element to be synchronized is not configured with belonging to the first network element
When the client identification module SIM card of operator, configuration is exclusively used in the synchronous scrambler sequence of the first network element；
When the network element configuration to be synchronized has the client identification module SIM card of the first network element operator, the random access
Scrambler sequence random arrangement from scheduled scrambler sequence set.
11. a kind of communication network element, which is characterized in that the device including the described in any item air interface synchronizations of claim 6 to 10.
12. communication network element according to claim 11, which is characterized in that the communication network element includes base station.
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| CN107959537B (en) * | 2016-10-17 | 2020-10-16 | 中国移动通信有限公司研究院 | State synchronization method and device |
| CN109891957B (en) * | 2016-10-28 | 2022-03-08 | 瑞典爱立信有限公司 | UE compensated timing advance |
| CN107404754B (en) * | 2017-06-13 | 2020-10-13 | 深圳市市政设计研究院有限公司 | Clock synchronization method and system between LTE base stations in rail transit industry |
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| CN102577547A (en) * | 2009-10-30 | 2012-07-11 | 诺基亚西门子通信公司 | HeNB blind detection for hierarchy configuration |
| WO2013185318A1 (en) * | 2012-06-14 | 2013-12-19 | Nokia Siemens Networks Oy | Fast recovering for network listening schemes in synchronization over air for small cells |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102577547A (en) * | 2009-10-30 | 2012-07-11 | 诺基亚西门子通信公司 | HeNB blind detection for hierarchy configuration |
| WO2013185318A1 (en) * | 2012-06-14 | 2013-12-19 | Nokia Siemens Networks Oy | Fast recovering for network listening schemes in synchronization over air for small cells |
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