CN103220775B - A kind of methods, devices and systems realizing data syn-chronization - Google Patents
A kind of methods, devices and systems realizing data syn-chronization Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of methods, devices and systems realizing data syn-chronization, because radio network controller directly can determine the downlink transfer time delay of self and each base station, be averaged without using downstream transmission time delay, relative to prior art, the precision of propagation delay time can be improved.And base station utilizes up-to-date downlink transfer time delay to determine the stand-by period, the ageing of the stand-by period determined can also be improved.Therefore, the scheme that the embodiment of the present invention provides, can improve the accuracy that mobile terminal receives the data that each base station in Active Set sends simultaneously, improve the macro diversity that mobile terminal obtains.Meanwhile, when determining the propagation delay time of radio network controller and each base station, without the need to carrying out signaling passback, therefore, can also signaling consumption be reduced, avoiding signaling to return the large problem of time delay.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of methods, devices and systems realizing data syn-chronization.
Background technology
At the third generation partner program (The3rdGenerationPartnershipProjectRelease5 of the 5th version, 3GPPR5) in agreement and later release agreement, Wideband Code Division Multiple Access (WCDMA) (WidebandCodeDivisionMultipleAccess, WCDMA) network configuration will all support internet protocol (InternetProtocol, IP), namely three kinds of terrestrial interface Iu/Iub/Iur can all adopt IP as host-host protocol, thus bring the improvement of two aspects can to WCDMA network simultaneously: the transmission bandwidth between interface can be improved on the one hand, effectively can reduce network construction cost on the other hand.In broadband IP transmission network, the topological diagram of wireless access network can be as shown in Figure 1.
In Fig. 1, each base station is connected with radio network controller by broadband IP transmission network.Broadband IP is the transmission technology of a kind of " doing one's best ", and therefore, radio network controller may be not identical to the interface propagation delay time, delay variation etc. of each base station.
When mobile terminal enters several base stations overlapping covered, can set up with several base stations and keep wireless link connection status simultaneously, now identical data is distributed to several base stations by radio network controller, several base stations by data retransmission to mobile terminal, mobile terminal enters to merge to each road signal, thus obtain receive diversity gain, be called grand diversity technique.Carry out several base stations communicated with mobile terminal, composition Active Set, the schematic diagram that grand diversity technique realizes can be as shown in Figure 2 simultaneously.
For broadband IP transmission network, it is not identical that radio network controller transmits data to the time delay reaching each base station, in addition, it is also different that each base station transmits a signal to the propagation time reaching mobile terminal, the two can cause mobile terminal to receive each base station, and to send time difference of identical signal larger, can interference be produced each other, reduce macro diversity.
In prior art, the data that radio network controller is distributed to each base station can arrive mobile terminal simultaneously to adopt following two steps to ensure:
The first step, utilizes synchronisation of nodes technology (comprising Frame Protocol, IEEE1588 agreement), measures and obtains radio network controller and each base-station transmission time delay, ensure that each base station can start to process identical data simultaneously;
Second step, several base stations in Active Set obtain according to mobile terminal measurement, and source base station is to air interface (eating dishes without rice or wine) transmission time of mobile terminal transmission data, and adjustment sends the time of signal, ensure to arrive mobile terminal with source base station signal simultaneously.
Above method is applied in broadband IP transmission network, can there is following two problems:
One, synchronisation of nodes technology needs to carry out signaling passback between radio network controller and base station, and measure and obtain unidirectional transmission time delay, in broadband IP transmission network, the passback of signaling can be delayed, and cannot meet the demand of the high business of delay requirement;
Two, in broadband IP transmission network, between radio network controller with each base station, the delay of up-downgoing one-way transmission can not ensure on stricti jurise equal, and synchronisation of nodes technology utilizes average two-way time, calculate the unidirectional transmission time delay between radio network controller and each base station obtained and there is comparatively big error.
Therefore, existing method is applied to realize data that radio network controller is distributed to each base station can arrive mobile terminal simultaneously time, there is signaling consumption large, signaling returns high time delay and the problem such as One Way Delay computational accuracy is low, the transmitting synchronous between radio network controller and each base station can be affected, cause the air interface between each base station and mobile terminal asynchronous further, reduce the macro diversity that mobile terminal obtains.
Summary of the invention
The embodiment of the present invention provides a kind of methods, devices and systems realizing data syn-chronization, for improving the macro diversity that mobile terminal obtains.
Realize a method for data syn-chronization, described method comprises:
Radio network controller receives the downlink transfer time delay that each base station in an Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines;
Radio network controller is for each base station in described Active Set, the lag time of this base station is determined according to described downlink transfer time delay and described air interface transmission time difference, when the lag time of a base station represents that described radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization, and by downlink data packet, the lag time of this base station is sent to this base station, so that each base station in described Active Set is when receiving downlink data packet, determine the downlink transfer time delay of current time; And according to the downlink transfer time delay of described current time, and the lag time in the downlink data packet received determines the stand-by period.
Realize a method for data syn-chronization, described method comprises:
Base station receives the downlink data packet of carrying the lag time of this base station, when the lag time of a base station represents that radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization, and determine the downlink transfer time delay of current time;
Base station is according to the downlink transfer time delay of described current time, the stand-by period is determined with the lag time in the downlink data packet received, from receiving the moment of described downlink data packet, described stand-by period is when arriving, by receive in the described stand-by period, the synchrodata of radio network controller distribution sends;
Wherein, described lag time is the downlink transfer time delay that radio network controller receives each base station in an Active Set and reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines; Determine according to described downlink transfer time delay and described air interface transmission time difference.
Realize a device for data syn-chronization, described device comprises:
Receiver module, the downlink transfer time delay that each base station for receiving in an Active Set reports, described downlink transfer time delay is the propagation delay time of radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines;
Determination module, for for each base station in described Active Set, the described downlink transfer time delay received according to receiver module and described air interface transmission time difference determine the lag time of this base station, when the lag time of a base station represents that described radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization;
Sending module, the lag time for each base station determined by determination module by downlink data packet sends to this base station, so that each base station in described Active Set is when receiving downlink data packet, determines the downlink transfer time delay of current time; And according to the downlink transfer time delay of described current time, and the lag time in the downlink data packet received determines the stand-by period.
Realize a device for data syn-chronization, described device comprises:
Receiver module, for receiving the downlink data packet of the lag time carrying a base station, when the lag time of a base station represents that radio network controller sends data to this base station, ensures the maximal adjustment time length needed for data syn-chronization; Wherein, described lag time is the downlink transfer time delay that radio network controller receives each base station in an Active Set and reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines; Determine according to described downlink transfer time delay and described air interface transmission time difference;
Determination module, for determining the downlink transfer time delay of described base station current time, according to the downlink transfer time delay of described current time, and the lag time in the downlink data packet that receives of receiver module determines the stand-by period;
Sending module, for the moment receiving described downlink data packet from receiver module, the synchrodata of that receive in the described stand-by period, described radio network controller distribution, when arriving, is sent to described mobile terminal by the stand-by period that described determination module is determined.
Realize a system for data syn-chronization, described system comprises each base station in Active Set corresponding to radio network controller, mobile terminal and this mobile terminal, wherein:
Described mobile terminal, for reporting the air interface transmission time difference between each target BS in described Active Set and source base station to described radio network controller, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines;
Described base station, for reporting downlink transfer time delay to described radio network controller, described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And when receiving downlink data packet, determine the downlink transfer time delay of current time; And according to the downlink transfer time delay of described current time, the stand-by period is determined with the lag time of this base station in the downlink data packet received, when the lag time of a base station represents that described radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization, from receiving the moment of described downlink data packet, the synchrodata of that receive in the described stand-by period, described radio network controller distribution, when arriving, is sent to described mobile terminal by the described stand-by period;
Described radio network controller, for receiving described air interface transmission time difference and described downlink transfer time delay, for each base station in described Active Set, determine the lag time of this base station according to described downlink transfer time delay and described air interface transmission time difference, and by downlink data packet, the lag time of this base station is sent to this base station.
According to the scheme that the embodiment of the present invention provides, the downlink transfer time delay that radio network controller can utilize each base station in Active Set to report, and each target BS in the Active Set of mobile terminal reporting and the air interface transmission time difference between source base station, determine the lag time that each base station is corresponding.Each base station can according to when receiving the downlink data packet of carrying lag time, and the downlink transfer time delay of current time and lag time determine the stand-by period of self correspondence, and when the stand-by period arrives, send data to mobile terminal.Because radio network controller directly can determine the downlink transfer time delay of self and each base station, be averaged without using downstream transmission time delay, relative to prior art, the precision of propagation delay time can be improved.And base station utilizes up-to-date downlink transfer time delay to determine the stand-by period, the ageing of the stand-by period determined can also be improved.Therefore, the scheme that the embodiment of the present invention provides, can improve the accuracy that mobile terminal receives the data that each base station in Active Set sends simultaneously, improve the macro diversity that mobile terminal obtains.Meanwhile, when determining the propagation delay time of radio network controller and each base station, without the need to carrying out signaling passback, therefore, can also signaling consumption be reduced, avoiding signaling to return the large problem of time delay.
Accompanying drawing explanation
The topological schematic diagram of the wireless access network that Fig. 1 provides for prior art;
The grand diversity technique that Fig. 2 provides for prior art realizes schematic diagram;
The flow chart of steps realizing the method for data syn-chronization that Fig. 3 provides for the embodiment of the present invention one;
The flow chart of steps realizing the method for data syn-chronization that Fig. 4 provides for the embodiment of the present invention two;
The flow chart of steps realizing the method for data syn-chronization that Fig. 5 provides for the embodiment of the present invention three;
The propagation delay time schematic diagram that Fig. 6 provides for the embodiment of the present invention three;
The schematic flow sheet realizing the method for data syn-chronization that Fig. 7 provides for the embodiment of the present invention three;
The structural representation realizing the system of data syn-chronization that Fig. 8 provides for the embodiment of the present invention four;
The structural representation realizing the device of data syn-chronization that Fig. 9 provides for the embodiment of the present invention five;
The structural representation realizing the device of data syn-chronization that Figure 10 provides for the embodiment of the present invention six.
Embodiment
The signaling consumption caused for prior art interior joint simultaneous techniques is large, signaling returns high time delay and the problem such as One Way Delay computational accuracy is low, the embodiment of the present invention proposes one and returns without the need to signaling, namely the solution of the downlink transfer time delay between radio network controller and base station can be determined exactly, ensure the transmitting synchronous of network side, and ensure the air interface synchronization between each base station and mobile terminal.
Below in conjunction with Figure of description, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.And when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Embodiment one,
The embodiment of the present invention one provides a kind of method realizing data syn-chronization, and the flow chart of steps of the method can as shown in Figure 3, comprise:
Step 101, radio network controller receive information.
In the present embodiment, in order to realize data syn-chronization, radio network controller needs the information received to comprise: the downlink transfer time delay that in an Active Set, each base station reports, and the air interface transmission time difference of mobile terminal reporting corresponding to described Active Set.
Concrete, in this step, radio network controller receives the downlink transfer time delay that each base station in an Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines.
Step 102, radio network controller determination lag time.
In this step, radio network controller for each base station in described Active Set, can determine the lag time of this base station according to described downlink transfer time delay and described air interface transmission time difference.The lag time of a base station can be understood as described radio network controller when sending data to this base station, ensures the maximal adjustment time length needed for data syn-chronization.
Concrete, radio network controller can determine the lag time of a base station in the following manner:
Radio network controller, for each base station in described Active Set, determines the downlink transfer time delay of this base station respectively, and air interface transmission time difference between this base station and source base station and value.
Radio network controller determines the maximum in described and value, thus when determining that radio network controller sends data to mobile terminal, ensures the maximal adjustment time that data syn-chronization needs.
Radio network controller is for each base station in described Active Set, and respectively by described maximum, and the difference of air interface transmission time difference between this base station and source base station is as the lag time of this base station.
It should be noted that, the air interface transmission time difference between source base station and source base station is zero.Therefore, mobile terminal without the need to reporting the air interface transmission time difference between source base station and source base station to radio network controller, thus saves Internet resources.And radio network controller can directly with zero as the air interface transmission time difference between source base station and source base station.
Further, after radio network controller determines the maximum in described and value, before radio network controller determines the lag time of base station, can also judge whether described maximum is greater than appointment time delay, described appointment time delay represents described radio network controller that the business of the current execution of described mobile terminal can the tolerate maximum delay to described mobile terminal transmission data, and the time delay when described maximum is not more than described appointment, keep described maximum constant, the time delay when described maximum is greater than described appointment, described maximum is updated to described appointment time delay.
Thus the described radio network controller that the business of the current execution of described mobile terminal can be utilized to tolerate transmits the maximum delay of data to revise described maximum to described mobile terminal, while guaranteeing to realize data syn-chronization, the QoS requirement of business can also be met.
Step 103, radio network controller send lag time to base station.
In this step, the lag time correspondence of this base station for each base station, can be sent to this base station by downlink data packet by radio network controller.
Step 104, base station determine the stand-by period.
The downlink transfer time delay of current time, when receiving downlink data packet, can be determined in each base station in described Active Set; And the downlink transfer time delay of the current time determined according to self, and the lag time in the downlink data packet received determines the stand-by period.The described stand-by period can be understood as a base station for receiving the time span of the synchrodata of radio network controller transmission.Namely described synchrodata can be understood as the radio network controller identical data that each base station sends in Active Set, and mobile terminal receives synchrodata and merges, and obtains receive diversity gain.
Concrete, the transmitting time of this downlink data packet can be marked in the downlink data packet that radio network controller sends to base station, then each base station can according to the transmitting time marked in the described downlink data packet received, and the time of reception of this downlink data packet, determine the downlink transfer time delay of current time.
Concrete, the lag time in the downlink data packet that self can receive by each base station and the difference of the downlink transfer time delay of current time self determined, be defined as the stand-by period of self correspondence.
Step 105, base station send data to mobile terminal.
Each base station from the moment receiving downlink data packet, when the stand-by period of self correspondence arrives, by receive in waiting time, the synchrodata of radio network controller distribution sends to mobile terminal.
Concrete, base station, when the described stand-by period is not less than 0, is opened up spatial cache and is stored synchrodata, from receiving the moment of described downlink data packet, the synchrodata stored in described spatial cache, when arriving, is sent to mobile terminal by the described stand-by period;
Base station, when the described stand-by period is less than 0, from the moment receiving described downlink data packet, does not send synchrodata to mobile terminal in setting duration.
That is, the data transmission quality between self and radio network controller by the judgement to the stand-by period, can be determined in base station.When the stand-by period is not less than 0, can within the stand-by period cache synchronization data, and when the stand-by period arrives, send the synchrodata of buffer memory in the stand-by period.When the described stand-by period is less than 0, can determine that the propagation delay time between this base station and radio network controller is longer, shake more violent, the delay requirement of business can not be met, therefore, can arrange a Penalty time (setting duration), in setting duration, this base station does not participate in grand diversity, avoids producing severe jamming to the transmission signal of other base stations.
Be described below by embodiment two pairs of embodiment of the present invention one.
Embodiment two,
The embodiment of the present invention two provides a kind of method realizing data syn-chronization, and the flow chart of steps of the method can as shown in Figure 4, comprise:
Step 201, radio network controller receive information.
In this step, radio network controller periodically can mark transmitting time T on downlink data frame or descending control frame
1, send to the some base stations in Active Set.Time of reception T, after receiving downlink data frame or descending control frame, is recorded in some base stations
2i(i=1,2 ..., N), N be not less than 2 positive integer, thus make base station side can obtain downlink transfer time delay Δ T between radio network controller and some base stations
i=(T
2i-T
1); Each base station can periodically by the downlink transfer time delay Δ T of self correspondence
ireport radio network controller.
Mobile terminal can the air interface transmission time difference Δ T of each target BS in periodic measurement Active Set and source base station
b1Bj=(T
bj-T
b1) (j=2,3 ..., N), and radio network controller can be reported by measurement report.
Step 202, radio network controller determination lag time.
Radio network controller is according to Access Network side downlink transfer time delay Δ T
i(i=1,2 ..., N) and air interface transmission time difference Δ T
b1Bj(j=2,3 ..., N), calculate radio network controller to mobile terminal, ensure that data syn-chronization needs maximal adjustment time Tmax:
Tmax=max{ΔT
1,（ΔT
j+ΔT
B1Bj）}
In the present embodiment, can be understood as the Δ T for calculating Tmax
ithe Δ T once received for radio network controller is up-to-date
i, Δ T
b1Bjthe Δ T once received for radio network controller is up-to-date
b1Bj.Certainly, be not limited to utilize the up-to-date Δ T once received
iwith Δ T
b1Bjcalculate Tmax, such as, the up-to-date Δ T received for M time can also be utilized
imean value and up-to-date L Δ T
b1Bjmean value calculation Tmax.Wherein M, L are the positive integer being not less than 2.
If Tmax>=T
qOS, then, and Tmax=T
qOS, otherwise Tmax is constant.Wherein, T
qOSrepresent described radio network controller that the business of the current execution of described mobile terminal can the tolerate maximum delay to described mobile terminal transmission data.
Radio network controller is according to maximal adjustment time Tmax, and the lag time of some base stations deal with data that allocation activation is concentrated is as follows:
For source base station lag time be: TH1=Tmax;
For in Active Set some other base stations lag time be: THj=(Tmax-Δ T
b1Bj) (j=2,3 ..., N).
Step 203, radio network controller send lag time to base station.
Radio network controller can periodically use descending control frame to issue base station lag time THi(i=1,2 ..., N) and to the some base stations in Active Set.
Step 204, base station determine the stand-by period.
The lag time THi that base station configures according to radio network controller and present frame record downlink transfer time delay Δ T
i, calculate the stand-by period TWi of some base stations deal with data:
TWi=THi-ΔT
i
Step 205, base station send data to mobile terminal.
If during TWi >=0, then the synchrodata received in a spatial cache memory latency time TWi is opened up in base station, and after stand-by period TWi arrives, by the synchrodata process framing in spatial cache, and is sent to mobile terminal.
If during TWi<0, then propagation delay time and shake acutely between the current and radio network controller in base station, the delay requirement of business can not be met, therefore, a Penalty time Tcomb is set, within this time period, this base station does not participate in grand diversity, avoids producing severe jamming to the transmission signal of other base stations.
Through above-mentioned steps, base station forwards the identical data of radio network controller distribution to mobile terminal, not only met network side transmitting synchronous but the side that ensures to eat dishes without rice or wine synchronous, can ensure that data reach mobile terminal simultaneously, mobile terminal is made to obtain optimum macro diversity, and the delay time and jitter overcoming broadband IP transmission network to greatest extent experiences the impact produced on user awareness, in addition, the signaling consumption required for air interface synchronization is also reduced.
Be described below by the concrete scheme of example to the embodiment of the present invention one, two.This embodiment illustrate realize that mobile terminal and three base stations (source base station and two target BS) carry out communicating realize grand diversity technique scheme.
Embodiment three,
The embodiment of the present invention three provides a kind of method realizing data syn-chronization, and the flow chart of steps of the method can as shown in Figure 5, comprise:
Step 301, radio network controller receive information.
Radio network controller periodically marks transmitting time T on downlink data frame or descending control frame
1, send to three base stations in Active Set.Time of reception T, after receiving downlink data frame or descending control frame, is recorded in three base stations
2i(i=1,2,3).Each base station can obtain radio network controller and the downlink transfer time delay Δ T between self
i=(T
2i-T
1).Each base station can periodically by downlink transfer time delay Δ T
ireport radio network controller.
The air interface transmission time difference Δ T of two target BS in mobile terminal period measurement Active Set and source base station
b1Bj=(T
bj-T
b1) (j=2,3), and report radio network controller by measurement report.
The propagation delay time schematic diagram that Fig. 6 provides for the present embodiment, in radio network controller and Active Set, the downlink transfer time delay of three base stations (source base station, target BS 1 and target BS 2) is respectively Δ T
1, Δ T
2with Δ T
3, in Active Set, three air interface transmission times between base station and mobile terminal are respectively T
b1, T
b2and T
b3.
Step 302, radio network controller determination lag time.
Radio network controller is according to Access Network side downlink transfer time delay Δ T
i(i=1,2,3) and air interface transmission time difference Δ T
b1Bj(j=2,3), periodically calculate radio network controller to mobile terminal, ensure that data syn-chronization needs maximal adjustment time Tmax:
Tmax=max{ΔT
1,（ΔT
2+ΔT
B1B2）,（ΔT
3+ΔT
B1B3）}
If Tmax>=T
qOS, then, and Tmax=T
qOS, otherwise Tmax is constant.Wherein, T
qOSrepresent described radio network controller that the business of the current execution of described mobile terminal can the tolerate maximum delay to described mobile terminal transmission data.
Radio network controller is according to maximal adjustment time Tmax, and the lag time of 3 base station deal with data that allocation activation is concentrated is as follows:
For source base station lag time be: TH1=Tmax;
For two other target BS lag time in Active Set be: THj=(Tmax-Δ T
b1Bj) (j=2,3).
Step 303, radio network controller send lag time to base station.
Radio network controller can periodically use descending control frame to issue base station lag time THi(i=1,2,3) to a base station, 3 in Active Set.
Step 304, base station determine the stand-by period.
The lag time THi that base station configures according to radio network controller and present frame record downlink transfer time delay Δ T
i, calculate the stand-by period TWi of three base station deal with data:
TWi=THi-ΔT
i（i=1,2,3）
Step 305, base station send data to mobile terminal.
If during TWi >=0, then the synchrodata received in a spatial cache memory latency time TWi is opened up in base station, and after stand-by period TWi arrives, by the synchrodata process framing in spatial cache, and is sent to mobile terminal.
If during TWi<0, then propagation delay time and shake acutely between the current and radio network controller in base station, the delay requirement of business can not be met, therefore, a Penalty time Tcomb is set, within this time period, this base station does not participate in grand diversity, avoids producing severe jamming to the transmission signal of other base stations.
The schematic flow sheet realizing the method for data syn-chronization that Fig. 7 provides for the present embodiment, supposes that two target BS are expressed as target BS 1 and target BS 2.Radio network controller sends data (Data) by transmitting terminal buffer, and source base station, target BS 1 and target BS 2 receive data respectively by the reception buffer of self.The downlink transfer time delay of the current time that source base station, target BS 1 and target BS 2 record can use Δ T respectively
1, Δ T
2with Δ T
3represent, if TH1-Δ T
1(i.e. TW1) >0, TH2-Δ T
2(i.e. TW2) >0, TH3-Δ T
3(i.e. TW3) <0, then:
Source base station, when TW1 duration arrives, (is assumed to be T through specifying duration
dealduration) process data into frame (Frame), and through T
b1duration is sent to mobile terminal;
Target BS 1 when TW2 duration arrives, equally through T
dealduration processes data into frame, and through T
b2duration is sent to mobile terminal, and T
b2with T
b1between difference be Δ T
b1B2;
Target BS 2 is when TW3 duration arrives, and packet discard, does not participate in grand diversity.
And the signal that mobile terminal can send source base station and target BS 1 enters to merge, thus obtain receive diversity gain.
With the embodiment of the present invention one ~ tri-based on same inventive concept, provide following device and system.
Embodiment four,
The embodiment of the present invention four provides a kind of system realizing data syn-chronization, and the structure of this system as shown in Figure 8, can comprise each base station 13 in Active Set corresponding to radio network controller 11, mobile terminal 12 and this mobile terminal, wherein:
Described mobile terminal 12 is for reporting the air interface transmission time difference between each target BS in described Active Set and source base station to described radio network controller, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines;
Described base station 13 is for reporting downlink transfer time delay to described radio network controller, and described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And when receiving downlink data packet, determine the downlink transfer time delay of current time; And according to the downlink transfer time delay of described current time, the stand-by period is determined with the lag time of this base station in the downlink data packet received, when the lag time of a base station represents that described radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization, from receiving the moment of described downlink data packet, the synchrodata of that receive in the described stand-by period, described radio network controller distribution, when arriving, is sent to described mobile terminal by the described stand-by period;
Described radio network controller 11 is for receiving described air interface transmission time difference and described downlink transfer time delay, for each base station in described Active Set, determine the lag time of this base station according to described downlink transfer time delay and described air interface transmission time difference, and by downlink data packet, the lag time of this base station is sent to this base station.
Embodiment five,
The embodiment of the present invention five provides a kind of device realizing data syn-chronization, and this device can be integrated in radio network controller, and the structure of this device can as shown in Figure 9, comprise:
The downlink transfer time delay that receiver module 21 reports for each base station received in an Active Set, described downlink transfer time delay is the propagation delay time of radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines;
Determination module 22 is for for each base station in described Active Set, the described downlink transfer time delay received according to receiver module and described air interface transmission time difference determine the lag time of this base station, when the lag time of a base station represents that described radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization;
Sending module 23 sends to this base station for the lag time of each base station determined by determination module by downlink data packet, so that each base station in described Active Set is when receiving downlink data packet, determines the downlink transfer time delay of current time; And according to the downlink transfer time delay of described current time, and the lag time in the downlink data packet received determines the stand-by period.
Described determination module 22, specifically for for each base station in described Active Set, determines the downlink transfer time delay of this base station respectively, and air interface transmission time difference between this base station and source base station and value; Determine the maximum in described and value; For each base station in described Active Set, respectively by described maximum, and the difference of air interface transmission time difference between this base station and source base station is as the lag time of this base station.
Described determination module 22 is also for after determining the maximum in described and value, before determining the lag time of base station, determine whether described maximum is greater than appointment time delay, described appointment time delay represents described radio network controller that the business of the current execution of described mobile terminal can the tolerate maximum delay to described mobile terminal transmission data, and the time delay when described maximum is not more than described appointment, keep described maximum constant, the time delay when described maximum is greater than described appointment, is updated to described appointment time delay by described maximum.
Embodiment six,
The embodiment of the present invention six provides a kind of device realizing data syn-chronization, and this device can be in a base station integrated, and the structure of this device can as shown in Figure 10, comprise:
Receiver module 31, for receiving the downlink data packet of the lag time carrying a base station, when the lag time of a base station represents that radio network controller sends data to this base station, ensures the maximal adjustment time length needed for data syn-chronization; Wherein, described lag time is the downlink transfer time delay that radio network controller receives each base station in an Active Set and reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines; Determine according to described downlink transfer time delay and described air interface transmission time difference;
Determination module 32 is for determining the downlink transfer time delay of described base station current time, and according to the downlink transfer time delay of described current time, and the lag time in the downlink data packet that receives of receiver module determines the stand-by period;
Sending module 33 is for the moment receiving described downlink data packet from receiver module, the synchrodata of that receive in the described stand-by period, described radio network controller distribution, when arriving, is sent to described mobile terminal by the stand-by period that described determination module is determined.
Described determination module 32, specifically for the difference of the downlink transfer time delay of the lag time in the downlink data packet that will receive and described current time, is defined as the stand-by period.
Described determination module 32 can also specifically for marking the transmitting time of this downlink data packet in described downlink data packet time, according to the transmitting time marked in the described downlink data packet received, and the time of reception of this downlink data packet, determine the downlink transfer time delay of current time.
Described sending module 33 is specifically for when the described stand-by period is not less than 0, open up spatial cache and store synchrodata, from the moment receiving described downlink data packet, when the described stand-by period arrives, the synchrodata stored in described spatial cache is sent to mobile terminal; When the described stand-by period is less than 0, from the moment receiving described downlink data packet, in setting duration, do not send synchrodata to mobile terminal.
Those skilled in the art should understand, the embodiment of the application can be provided as method, device, system or computer program.Therefore, the application can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the application can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The application describes with reference to according to the flow chart of the method for the embodiment of the present application, device, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although described the preferred embodiment of the application, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the application's scope.
Obviously, those skilled in the art can carry out various change and modification to the application and not depart from the spirit and scope of the application.Like this, if these amendments of the application and modification belong within the scope of the application's claim and equivalent technologies thereof, then the application is also intended to comprise these change and modification.
Claims (13)
1. realize a method for data syn-chronization, it is characterized in that, described method comprises:
Radio network controller receives the downlink transfer time delay that each base station in an Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines;
Radio network controller is for each base station in described Active Set, the lag time of this base station is determined according to described downlink transfer time delay and described air interface transmission time difference, when the lag time of a base station represents that described radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization, and by downlink data packet, the lag time of this base station is sent to this base station, so that each base station in described Active Set is when receiving downlink data packet, determine the downlink transfer time delay of current time; And according to the downlink transfer time delay of described current time, the stand-by period is determined with the lag time in the downlink data packet received, the stand-by period of a base station refers to that this base station receives the moment of the downlink data packet that described radio network controller sends, to the moment that the synchrodata sent by the described radio network controller received sends to mobile terminal, institute's elapsed time length;
Wherein, radio network controller, for each base station in described Active Set, is determined the lag time of this base station, is specifically comprised according to described downlink transfer time delay and described air interface transmission time difference:
Radio network controller, for each base station in described Active Set, determines the downlink transfer time delay of this base station respectively, and air interface transmission time difference between this base station and source base station and value;
Radio network controller determines the maximum in described and value;
Radio network controller for each base station in described Active Set, respectively using described maximum and the difference of the air interface transmission time difference between this base station and the source base station lag time as this base station.
2. the method for claim 1, is characterized in that, after radio network controller determines the maximum in described and value, before radio network controller determines the lag time of base station, described method also comprises:
Radio network controller determines whether described maximum is greater than appointment time delay, described appointment time delay represents described radio network controller that the business of the current execution of described mobile terminal can the tolerate maximum delay to described mobile terminal transmission data, and the time delay when described maximum is not more than described appointment, keep described maximum constant, the time delay when described maximum is greater than described appointment, is updated to described appointment time delay by described maximum.
3. realize a method for data syn-chronization, it is characterized in that, described method comprises:
Base station receives the downlink data packet of carrying the lag time of this base station, when the lag time of a base station represents that radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization, and determine the downlink transfer time delay of current time;
Base station is according to the downlink transfer time delay of described current time, the stand-by period is determined with the lag time in the downlink data packet received, from receiving the moment of described downlink data packet, described stand-by period is when arriving, by receive in the described stand-by period, the synchrodata of radio network controller distribution sends;
Wherein, radio network controller receives the downlink transfer time delay that each base station in an Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station; Determine the air interface transmission time difference between each target BS in described Active Set and source base station and value, determine the maximum in described and value, for each base station in described Active Set, respectively using described maximum and the difference of the air interface transmission time difference between this base station and the source base station lag time as this base station; Air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines.
4. method as claimed in claim 3, it is characterized in that, base station is according to the downlink transfer time delay of described current time, and the lag time in the downlink data packet received determines the stand-by period, specifically comprises:
Base station, by the difference of the downlink transfer time delay of the lag time in the downlink data packet that receives and described current time, is defined as the stand-by period.
5. method as claimed in claim 3, it is characterized in that, base station from the moment receiving described downlink data packet, when the described stand-by period arrives, by receive in the described stand-by period, radio network controller distribution synchrodata send, specifically comprise:
Base station, when the described stand-by period is not less than 0, is opened up spatial cache and is stored synchrodata, from the moment receiving described downlink data packet, when the described stand-by period arrives, the synchrodata stored in described spatial cache is sent to mobile terminal;
Base station, when the described stand-by period is less than 0, from the moment receiving described downlink data packet, does not send synchrodata to mobile terminal in setting duration.
6. the method as described in as arbitrary in claim 3 ~ 5, it is characterized in that, mark the transmitting time of this downlink data packet in described downlink data packet, then the downlink transfer time delay of current time is determined in base station, specifically comprises:
Base station is according to the transmitting time marked in the described downlink data packet received, and the time of reception of this downlink data packet, determines the downlink transfer time delay of current time.
7. realize a device for data syn-chronization, it is characterized in that, described device comprises:
Receiver module, the downlink transfer time delay that each base station for receiving in an Active Set reports, described downlink transfer time delay is the propagation delay time of radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines;
Determination module, for for each base station in described Active Set, determines the downlink transfer time delay of this base station respectively, and air interface transmission time difference between this base station and source base station and value; Determine the maximum in described and value; For each base station in described Active Set, respectively by described maximum, and the difference of the air interface transmission time difference between this base station and source base station is as the lag time of this base station, when the lag time of a base station represents that described radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization;
Sending module, the lag time for each base station determined by determination module by downlink data packet sends to this base station, so that each base station in described Active Set is when receiving downlink data packet, determines the downlink transfer time delay of current time; And according to the downlink transfer time delay of described current time, the stand-by period is determined with the lag time in the downlink data packet received, the stand-by period of a base station refers to that this base station receives the moment of the downlink data packet that described radio network controller sends, to the moment that the synchrodata sent by the described radio network controller received sends to mobile terminal, institute's elapsed time length.
8. device as claimed in claim 7, it is characterized in that, described determination module, also for after determining the maximum in described and value, before determining the lag time of base station, determine whether described maximum is greater than appointment time delay, described appointment time delay represents described radio network controller that the business of the current execution of described mobile terminal can the tolerate maximum delay to described mobile terminal transmission data, and the time delay when described maximum is not more than described appointment, keep described maximum constant, the time delay when described maximum is greater than described appointment, described maximum is updated to described appointment time delay.
9. realize a device for data syn-chronization, it is characterized in that, described device comprises:
Receiver module, for receiving the downlink data packet of the lag time carrying a base station, when the lag time of a base station represents that radio network controller sends data to this base station, ensures the maximal adjustment time length needed for data syn-chronization; Wherein, radio network controller receives the downlink transfer time delay that each base station in an Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And each target BS in the described Active Set that reports of mobile terminal receive and the air interface transmission time difference between source base station; Determine the air interface transmission time difference between each target BS in described Active Set and source base station and value, determine the maximum in described and value, for each base station in described Active Set, respectively using described maximum and the difference of the air interface transmission time difference between this base station and the source base station lag time as this base station; Air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines; Determine according to described downlink transfer time delay and described air interface transmission time difference;
Determination module, for determining the downlink transfer time delay of described base station current time, according to the downlink transfer time delay of described current time, and the lag time in the downlink data packet that receives of receiver module determines the stand-by period;
Sending module, for the moment receiving described downlink data packet from receiver module, the synchrodata of that receive in the described stand-by period, described radio network controller distribution, when arriving, is sent to described mobile terminal by the stand-by period that described determination module is determined.
10. device as claimed in claim 9, is characterized in that, described determination module, specifically for the difference of the downlink transfer time delay of the lag time in the downlink data packet that will receive and described current time, is defined as the stand-by period.
11. devices as claimed in claim 9, it is characterized in that, described sending module, specifically for when the described stand-by period is not less than 0, open up spatial cache and store synchrodata, from the moment receiving described downlink data packet, when the described stand-by period arrives, the synchrodata stored in described spatial cache is sent to mobile terminal; When the described stand-by period is less than 0, from the moment receiving described downlink data packet, in setting duration, do not send synchrodata to mobile terminal.
12. as arbitrary in claim 9 ~ 11 as described in device, it is characterized in that, described determination module, during specifically for marking the transmitting time of this downlink data packet in described downlink data packet, according to the transmitting time marked in the described downlink data packet received, and the time of reception of this downlink data packet, determine the downlink transfer time delay of current time.
13. 1 kinds of systems realizing data syn-chronization, it is characterized in that, described system comprises each base station in Active Set corresponding to radio network controller, mobile terminal and this mobile terminal, wherein:
Described mobile terminal, for reporting the air interface transmission time difference between each target BS in described Active Set and source base station to described radio network controller, air interface transmission time difference be described mobile terminal according to the air interface transmission time of a target BS to described mobile terminal transmission data, to transmit to described mobile terminal with source base station that the difference of the air interface transmission time of data determines;
Described base station, for reporting downlink transfer time delay to described radio network controller, described downlink transfer time delay is the propagation delay time of described radio network controller to base-station transmission data; And when receiving downlink data packet, determine the downlink transfer time delay of current time; And according to the downlink transfer time delay of described current time, the stand-by period is determined with the lag time of this base station in the downlink data packet received, when the lag time of a base station represents that described radio network controller sends data to this base station, ensure the maximal adjustment time length needed for data syn-chronization, from receiving the moment of described downlink data packet, the synchrodata of that receive in the described stand-by period, described radio network controller distribution, when arriving, is sent to described mobile terminal by the described stand-by period;
Described radio network controller, for receiving described air interface transmission time difference and described downlink transfer time delay, for each base station in described Active Set, determine the lag time of this base station according to described downlink transfer time delay and described air interface transmission time difference, and by downlink data packet, the lag time of this base station is sent to this base station.
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| US11071079B2 (en) | 2015-05-21 | 2021-07-20 | Andrew Wireless Systems Gmbh | Synchronizing multiple-input/multiple-output signals in distributed antenna systems |
| CN107508763B (en) * | 2016-06-14 | 2021-04-13 | 景略半导体(上海)有限公司 | Sending time control method, system and transmission equipment |
| CN108696451B (en) * | 2017-04-06 | 2021-09-14 | 上海诺基亚贝尔股份有限公司 | Method and device for controlling flow |
| CN108449228B (en) * | 2018-03-05 | 2020-03-17 | 新华三技术有限公司 | Message processing method and network equipment |
| CN112688751A (en) * | 2019-10-18 | 2021-04-20 | 华为技术有限公司 | Communication method, device and system |
| CN117119602B (en) * | 2023-07-10 | 2024-06-18 | 北京云智软通信息技术有限公司 | User equipment scheduling method, device and base station |
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| CN1852507A (en) * | 2005-09-13 | 2006-10-25 | 华为技术有限公司 | Time-delay obtaining method for interface transmission between wireless network controller and base station |
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