CN103220775A - Method, device and system for achieving data synchronization - Google Patents
Method, device and system for achieving data synchronization Download PDFInfo
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Abstract
The invention provides a method, device and system for achieving data synchronization. A wireless network controller can directly determine downlink transmission delay of the wireless network controller self and downlink transmission delay of each base station, the mode of taking the average of uplink transmission delay and the downlink transmission delay is needless, and compared with the prior art, the precision of transmission delay can be improved. The latest downlink transmission delay is used by the base stations for determining waiting time, and the timeliness of the determined waiting time can be further improved. Therefore, the method, device and system for achieving the data synchronization can improve the accuracy of data sent by each base station in an active set received by a mobile terminal simultaneously and improve the macro-diversity gain obtained by the mobile terminal. Meanwhile, when the transmission delay of the wireless network controller and the transmission delay of each base station are determined, signaling passing-back is of no need. Therefore, signaling overheads can also be lowered, and the problem of large time delay in signaling passing-back is solved.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of methods, devices and systems of realizing data sync.
Background technology
Third generation partner program (The3rd Generation Partnership Project Release5 at the 5th version, 3GPP R5) in agreement and the later release agreement, Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, WCDMA) network configuration will all be supported internet protocol (Internet Protocol, IP), promptly three kinds of terrestrial interface Iu/Iub/Iur can all adopt IP as host-host protocol, thereby the improvement that can bring two aspects simultaneously for the WCDMA network: can improve the transmission bandwidth between the interface on the one hand, can effectively reduce network construction cost on the other hand.In the broadband IP transmission network, the topological diagram of wireless access network can be as shown in Figure 1.
Among Fig. 1, each base station links to each other with radio network controller by the 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 all inequality to the interface propagation delay time of each base station, delay variation etc.
When portable terminal enters several base stations overlapping covered, can set up and keep the Radio Link connection status simultaneously with several base stations, this moment, radio network controller was distributed to several base stations with identical data, portable terminal is given with data forwarding in several base stations, portable terminal advances to merge to each road signal, thereby obtain the receive diversity gain, be called grand diversity technique.While and several base stations that portable terminal communicates, form Active Set, the schematic diagram that grand diversity technique realizes can be as shown in Figure 2.
For the broadband IP transmission network, it is inequality that radio network controller transmits data to the time delay that reaches each base station, in addition, the propagation time that each base station transmit signals arrives portable terminal also has nothing in common with each other, the two can cause portable terminal to receive each base station, and to send time difference of same signal bigger, can produce interference each other, reduce macro diversity.
In the prior art, the data that adopt following two steps to guarantee that radio network controller is distributed to each base station can arrive portable terminal simultaneously:
The first step is utilized node simultaneous techniques (comprising Frame Protocol, IEEE1588 agreement), measures to obtain radio network controller and each base station transmits time delay, guarantees that each base station can begin to handle identical data simultaneously;
In second step, several base stations in the Active Set measure according to portable terminal, and source base station is adjusted the time that sends signal to air interface (eating dishes without rice or wine) transmission time of portable terminal transmission data, guarantee to arrive portable terminal simultaneously with the source base station signal.
Above method is used in the broadband IP transmission network, can have following two problems:
One, the node simultaneous techniques needs to carry out between radio network controller and the base station signaling passback, measures and obtains unidirectional transmission time delay, and in the broadband IP transmission network, the passback of signaling can produce delay, can't satisfy the demand of the high business of delay requirement;
Two, in the broadband IP transmission network, the delay of up-downgoing one-way transmission can not guarantee to equate on the stricti jurise between radio network controller and each base station, and the node simultaneous techniques utilizes average two-way time, calculates the radio network controller and the unidirectional transmission time delay between each base station that obtain and exists than mistake.
Therefore, when the method that will have now is applied to realize that data that radio network controller is distributed to each base station can arrive portable terminal simultaneously, exist signaling consumption big, signaling returns problems such as high time delay and One Way Delay computational accuracy be low, can influence the transmitting synchronous between radio network controller and each base station, further cause the air interface between each base station and the portable terminal asynchronous, reduce the macro diversity that portable terminal obtains.
Summary of the invention
The embodiment of the invention provides a kind of methods, devices and systems of realizing data sync, is used to improve the macro diversity that portable terminal obtains.
A kind of method that realizes data sync, described method comprises:
Radio network controller receives the downlink transfer time delay that each base station in the Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base station transmits data; And each target BS in the described Active Set that reports of mobile terminal receive and the transmission time difference of eating dishes without rice or wine between the source base station, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station;
Radio network controller is at each base station in the described Active Set, determine the lag time of this base station according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine, when the lag time of a base station represents that described radio network controller sends data to this base station, guarantee the required maximal adjustment time length of data sync, and the lag time of this base station is sent to this base station by downlink data packet, so that the downlink transfer time delay of current time when receiving downlink data packet, is determined in each base station in the described Active Set; And determine the stand-by period according to the lag time in the downlink transfer time delay of described current time and the downlink data packet that receives.
A kind of method that realizes data sync, described method comprises:
The base station receives the downlink data packet of the lag time that carries this base station, when the lag time of a base station represents that radio network controller sends data to this base station, guarantee the required maximal adjustment time length of data sync, and the downlink transfer time delay of definite current time;
The base station is according to the downlink transfer time delay of described current time, determine the stand-by period with the lag time in the downlink data packet that receives, from receiving the moment of described downlink data packet, the described stand-by period when arriving sends synchrodata that receive in the described stand-by period, the radio network controller distribution;
Wherein, described lag time is that radio network controller receives the downlink transfer time delay that each base station in the Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base station transmits data; And each target BS in the described Active Set that reports of mobile terminal receive and the transmission time difference of eating dishes without rice or wine between the source base station, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station; Determine according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine.
A kind of device of realizing data sync, described device comprises:
Receiver module is used for receiving the downlink transfer time delay that each base station of an Active Set reports, and described downlink transfer time delay is the propagation delay time of radio network controller to base station transmits data; And each target BS in the described Active Set that reports of mobile terminal receive and the transmission time difference of eating dishes without rice or wine between the source base station, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station;
Determination module, be used for each base station at described Active Set, the lag time that described downlink transfer time delay that receives according to receiver module and the described transmission time difference of eating dishes without rice or wine are determined this base station, when the lag time of a base station represents that described radio network controller sends data to this base station, guarantee the required maximal adjustment time length of data sync;
Sending module is used for sending to this base station by the lag time of downlink data packet each base station that determination module is definite, so that the downlink transfer time delay of current time when receiving downlink data packet, is determined in each base station in the described Active Set; And determine the stand-by period according to the lag time in the downlink transfer time delay of described current time and the downlink data packet that receives.
A kind of device of realizing data sync, described device comprises:
Receiver module is used to receive the downlink data packet of the lag time that carries a base station, when the lag time of a base station represents that radio network controller sends data to this base station, guarantees the required maximal adjustment time length of data sync; Wherein, described lag time is that radio network controller receives the downlink transfer time delay that each base station in the Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base station transmits data; And each target BS in the described Active Set that reports of mobile terminal receive and the transmission time difference of eating dishes without rice or wine between the source base station, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station; Determine according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine;
Determination module is used for determining the downlink transfer time delay of described base station current time, and the lag time in the downlink data packet that receives according to the downlink transfer time delay and the receiver module of described current time is determined the stand-by period;
Sending module, be used in the moment that receives described downlink data packet from receiver module, the stand-by period that described determination module is determined, the synchrodata that radio network controller that receive in the described stand-by period, described is distributed sent to described portable terminal when arriving.
A kind of realization data synchronization system, described system comprise each base station in the Active Set of radio network controller, portable terminal and this portable terminal correspondence, wherein:
Described portable terminal, be used for reporting each target BS of described Active Set and the transmission time difference of eating dishes without rice or wine between the source base station to described radio network controller, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station;
Described base station is used for reporting the 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 transmits 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, determine the stand-by period with the lag time of this base station in the downlink data packet that receives, when the lag time of a base station represents that described radio network controller sends data to this base station, guarantee the required maximal adjustment time length of data sync, from receiving the moment of described downlink data packet, the described stand-by period, the synchrodata that radio network controller that receive in the described stand-by period, described is distributed sent to described portable terminal when arriving;
Described radio network controller, be used to receive described transmission time difference and the described downlink transfer time delay of eating dishes without rice or wine, at each base station in the described Active Set, determine the lag time of this base station according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine, and the lag time of this base station is sent to this base station by downlink data packet.
The scheme that provides according to the embodiment of the invention, the downlink transfer time delay that radio network controller can utilize each base station in the Active Set to report, and each target BS in the Active Set of mobile terminal reporting and the transmission time difference of eating dishes without rice or wine between the source base station, determine the lag time of each base station correspondence.Each base station can be when receiving the downlink data packet of carrying lag time, and the downlink transfer time delay of current time and lag time are determined the stand-by period of self correspondence, and when the stand-by period arrives, send data to portable terminal.Because radio network controller can directly be determined the downlink transfer time delay of self and each base station, need not to utilize the up-downgoing propagation delay time to be averaged, and with respect to prior art, can improve the precision of propagation delay time.And the base station utilizes up-to-date downlink transfer time delay to determine the stand-by period, can also improve the ageing of stand-by period of determining.Therefore, the scheme that the embodiment of the invention provides can improve the accuracy that portable terminal receives the data of each base station transmission in the Active Set simultaneously, improves the macro diversity that portable terminal obtains.Simultaneously, when determining the propagation delay time of radio network controller and each base station, need not to carry out the signaling passback, therefore, can also reduce signaling consumption, avoid the big problem of signaling passback time delay.
Description of drawings
The topological schematic diagram of the wireless access network that Fig. 1 provides for prior art;
Fig. 2 realizes schematic diagram for the grand diversity technique that prior art provides;
The flow chart of steps of the method for the realization data sync that Fig. 3 provides for the embodiment of the invention one;
The flow chart of steps of the method for the realization data sync that Fig. 4 provides for the embodiment of the invention two;
The flow chart of steps of the method for the realization data sync that Fig. 5 provides for the embodiment of the invention three;
The propagation delay time schematic diagram that Fig. 6 provides for the embodiment of the invention three;
The schematic flow sheet of the method for the realization data sync that Fig. 7 provides for the embodiment of the invention three;
The structural representation of the realization data synchronization system that Fig. 8 provides for the embodiment of the invention four;
The structural representation of the device of the realization data sync that Fig. 9 provides for the embodiment of the invention five;
The structural representation of the device of the realization data sync that Figure 10 provides for the embodiment of the invention six.
Embodiment
The signaling consumption that causes at node simultaneous techniques in the prior art is big, signaling returns problems such as high time delay and One Way Delay computational accuracy be low, the embodiment of the invention proposes a kind of signaling passback that need not, promptly can determine the solution of the downlink transfer time delay between radio network controller and the base station exactly, guarantee the transmitting synchronous of network side, and guarantee that the air interface between each base station and the portable terminal is synchronous.
Below in conjunction with Figure of description the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.And under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Embodiment one,
The embodiment of the invention one provides a kind of method that realizes data sync, and the flow chart of steps of this method can comprise as shown in Figure 3:
In the present embodiment, in order to realize data sync, the information that radio network controller need receive comprises: the transmission time difference of eating dishes without rice or wine that downlink transfer time delay that each base station reports in Active Set and described Active Set corresponding mobile terminal report.
Concrete, in this step, radio network controller receives the downlink transfer time delay that each base station in the Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base station transmits data; And each target BS in the described Active Set that reports of mobile terminal receive and the transmission time difference of eating dishes without rice or wine between the source base station, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station.
In this step, radio network controller can be at each base station in the described Active Set, determines the lag time of this base station according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine.When the lag time of a base station can be understood as described radio network controller and sends data to this base station, guarantee the required maximal adjustment time length of data sync.
Concrete, radio network controller can be determined the lag time of a base station in the following manner:
Radio network controller is at each base station in the described Active Set, determines the downlink transfer time delay of this base station respectively, and the transmission time difference of eating dishes without rice or wine between this base station and the source base station and value.
Radio network controller is determined the maximum in the described and value, thereby when determining that radio network controller sends data to portable terminal, guarantees the maximal adjustment time of data sync needs.
Radio network controller is at each base station in the described Active Set, and respectively with described maximum, and the difference of the transmission time difference of eating dishes without rice or wine between this base station and the source base station is as the lag time of this base station.
Need to prove that the transmission time difference of eating dishes without rice or wine between source base station and the source base station is zero.Therefore, portable terminal need not to report the transmission time difference of eating dishes without rice or wine between source base station and the source base station to radio network controller, thus conserve network resources.And radio network controller can directly use zero as the transmission time difference of eating dishes without rice or wine between source base station and the source base station.
Further, radio network controller is determined after the maximum in the described and value, radio network controller is determined before the lag time of base station, can also judge that whether described maximum is greater than specifying time delay, described appointment time delay is represented described radio network controller that the business of the current execution of described portable terminal can the tolerate maximum delay to described portable terminal transmission data, and time-delay when described maximum is not more than described appointment, keep described maximum constant, in the time time-delay of described maximum, described maximum is updated to described appointment time delay greater than described appointment.
Thereby the described radio network controller that the business that can utilize the current execution of described portable terminal can be tolerated is revised described maximum to the maximum delay of described portable terminal transmission data, when guaranteeing to realize data sync, can also satisfy professional QoS requirement.
In this step, radio network controller can be at each base station, by downlink data packet the lag time correspondence of this base station is sent to this base station.
The stand-by period is determined in step 104, base station.
The downlink transfer time delay of current time can be determined in each base station in the described Active Set when receiving downlink data packet; And the lag time in the downlink transfer time delay of the current time of determining according to self and the downlink data packet that receives is determined the stand-by period.The described stand-by period can be understood as the time span that a base station is used to receive the synchrodata that radio network controller sends.Described synchrodata promptly can be interpreted as the radio network controller identical data that each base station sends in Active Set, and the portable terminal receiving isochronous data also merges, and obtains the receive diversity gain.
Concrete, radio network controller can this downlink data packet of mark in the downlink data packet that the base station sends transmitting time, then each base station can be according to the transmitting time of mark in the described downlink data packet that receives, and the time of reception of this downlink data packet, determine the downlink transfer time delay of current time.
Concrete, the downlink transfer time delay of lag time in the downlink data packet that each base station can receive self and the current time of self determining poor is defined as stand-by period of self correspondence.
Each base station is from receiving the moment of downlink data packet, and the stand-by period of self correspondence sends to portable terminal with synchrodata that receive in waiting time, the radio network controller distribution when arriving.
Concrete, the base station is not less than at 0 o'clock in the described stand-by period, opens up spatial cache storage synchrodata, from receiving the moment of described downlink data packet, the described stand-by period sends to portable terminal with the synchrodata of storing in the described spatial cache when arriving;
The base station the described stand-by period less than 0 o'clock, from receiving the moment of described downlink data packet, set in the duration and do not send synchrodata to portable terminal.
That is, the base station can be by to the judgement of stand-by period, determines the data transmission quality between self and the radio network controller.Be not less than at 0 o'clock in the stand-by period, can be in the stand-by period buffer memory synchrodata, and when the stand-by period arrives, send the synchrodata of buffer memory in the stand-by period.The described stand-by period less than 0 o'clock, can determine that the propagation delay time between this base station and the radio network controller is longer, shake more violent, can not satisfy professional time delay demand, therefore, a Penalty time (setting duration) can be set, and this base station does not participate in grand diversity in setting duration, avoids the transmission signal of other base stations is produced serious the interference.
Describe below by two pairs of embodiment of the invention one of embodiment.
Embodiment two,
The embodiment of the invention two provides a kind of method that realizes data sync, and the flow chart of steps of this method can comprise as shown in Figure 4:
In this step, radio network controller can periodicity mark transmitting time T on downlink data frame or descending control frame
1, send to the several base stations in the Active Set.Several base stations is noted time of reception T after receiving downlink data frame or descending control frame
2i(i=1,2 ..., N), N is not less than 2 positive integer, thereby makes base station side can obtain downlink transfer time delay Δ T between radio network controller and the several base stations
i=(T
2i-T
1); Each base station can be periodically with the downlink transfer time delay Δ T of self correspondence
iReport radio network controller.
Portable terminal in can the periodic measurement Active Set each target BS and the air interface transmission time difference Δ T of source base station
B1Bj=(T
Bj-T
B1) (j=2,3 ..., N), and can report radio network controller by measurement report.
Radio network controller is according to Access Network side downlink transfer time delay Δ T
i(i=1,2 ..., N) and the transmission time difference Δ T that eats dishes without rice or wine
B1Bj(j=2,3 ..., N), calculate radio network controller to portable terminal, guarantee that data sync needs maximal adjustment time Tmax:
Tmax=max{ΔT
1,（ΔT
j+ΔT
B1Bj）}
In the present embodiment, can be understood as the Δ T that is used to calculate Tmax
iThe Δ T that once receives for radio network controller is up-to-date
i, Δ T
B1BjThe Δ T that once receives for radio network controller is up-to-date
B1BjCertainly, be not limited to utilize the up-to-date Δ T that once receives
iWith Δ T
B1BjCalculate Tmax, such as, the up-to-date Δ T that receives for M time can also be utilized
iMean value and up-to-date L Δ T
B1BjMean value calculation Tmax.Wherein M, L are and are not less than 2 positive integer.
If Tmax 〉=T
QOS, then, Tmax=T
QOS, otherwise Tmax is constant.Wherein, T
QOSRepresent described radio network controller that the business of the current execution of described portable terminal can tolerate maximum delay to described portable terminal transmission data.
Radio network controller is according to maximal adjustment time Tmax, and the lag time of the several base stations deal with data that allocation activation is concentrated is as follows:
For the source base station lag time be: TH1=Tmax;
For other several base stations lag times in the Active Set be: THj=(Tmax-Δ T
B1Bj) (j=2,3 ..., N).
Radio network controller can periodically use descending control frame to issue base station lag time THi(i=1, and 2 ..., N) to the several base stations in the Active Set.
The stand-by period is determined in step 204, base station.
The base station records downlink transfer time delay Δ T according to the lag time THi and the present frame of radio network controller configuration
i, calculate the stand-by period TWi of several base stations deal with data:
TWi=THi-ΔT
i
If TWi 〉=0 o'clock, then the synchrodata that receives in the spatial cache memory latency time TWi is opened up in the base station, and after stand-by period TWi arrives, the synchrodata in the spatial cache is handled framing, and be sent to portable terminal.
If TWi＜0 o'clock, then propagation delay time and shake are violent between the current and radio network controller in base station, can not satisfy professional time delay demand, therefore, a Penalty time Tcomb is set, this base station does not participate in grand diversity in this time period, avoids the transmission signal of other base stations is produced serious the interference.
Through above-mentioned steps, the base station is transmitted the identical data of radio network controller distribution and is given portable terminal, not only satisfied the network side transmitting synchronous but the side that guarantees to eat dishes without rice or wine synchronous, can guarantee that data reach portable terminal simultaneously, make portable terminal obtain optimum macro diversity, and overcome the time delay of broadband IP transmission network to greatest extent and shake the influence that user's sensory experience is produced, in addition, also reduce the synchronous needed signaling consumption of air interface.
Describe below by the scheme of a concrete example the embodiment of the invention one, two.This embodiment illustrates the grand diversity technique scheme of realization that realizes that portable terminal and three base stations (source base station and two target BS) communicate.
Embodiment three,
The embodiment of the invention three provides a kind of method that realizes data sync, and the flow chart of steps of this method can comprise as shown in Figure 5:
Radio network controller is mark transmitting time T on downlink data frame or descending control frame periodically
1, send to three base stations in the Active Set.Time of reception T is noted in three base stations after receiving downlink data frame or descending control frame
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 be periodically with downlink transfer time delay Δ T
iReport radio network controller.
Two target BS in the mobile terminal period measurement Active Set and the air interface transmission time difference Δ T of 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 present embodiment, the downlink transfer time delay of three base stations (source base station, target BS 1 and target BS 2) is respectively Δ T in radio network controller and the Active Set
1, Δ T
2With Δ T
3, the transmission time of eating dishes without rice or wine in the Active Set between three base stations and the portable terminal is respectively T
B1, T
B2And T
B3
Radio network controller is according to Access Network side downlink transfer time delay Δ T
i(i=1,2,3) and the transmission time difference Δ T that eats dishes without rice or wine
B1Bj(j=2,3) periodically calculate radio network controller to portable terminal, guarantee that data sync needs maximal adjustment time Tmax:
Tmax=max{ΔT
1,（ΔT
2+ΔT
B1B2）,（ΔT
3+ΔT
B1B3）}
If Tmax 〉=T
QOS, then, Tmax=T
QOS, otherwise Tmax is constant.Wherein, T
QOSRepresent described radio network controller that the business of the current execution of described portable terminal can tolerate maximum delay to described portable 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 the source base station lag time be: TH1=Tmax;
For two other target BS lag time in the Active Set be: THj=(Tmax-Δ T
B1Bj) (j=2,3).
Radio network controller can periodically use descending control frame to issue base station lag time THi(i=1,2,3) to 3 base stations in the Active Set.
The stand-by period is determined in step 304, base station.
The base station records downlink transfer time delay Δ T according to the lag time THi and the present frame of radio network controller configuration
i, calculate the stand-by period TWi of three base station deal with data:
TWi=THi-ΔT
i（i=1,2,3）
If TWi 〉=0 o'clock, then the synchrodata that receives in the spatial cache memory latency time TWi is opened up in the base station, and after stand-by period TWi arrives, the synchrodata in the spatial cache is handled framing, and be sent to portable terminal.
If TWi＜0 o'clock, then propagation delay time and shake are violent between the current and radio network controller in base station, can not satisfy professional time delay demand, therefore, a Penalty time Tcomb is set, this base station does not participate in grand diversity in this time period, avoids the transmission signal of other base stations is produced serious the interference.
The schematic flow sheet of the method for the realization data sync that Fig. 7 provides for present embodiment supposes that two target BS are expressed as target BS 1 and target BS 2 respectively.Radio network controller sends data (Data) by the transmitting terminal buffer, and source base station, target BS 1 and target BS 2 receive data by the reception buffer of self respectively.The downlink transfer time delay of the current time that source base station, target BS 1 and target BS 2 record can be used Δ T respectively
1, Δ T
2With Δ T
3If expression is TH1-Δ T
1(being TW1)〉0, TH2-Δ T
2(being TW2)〉0, TH3-Δ T
3(being TW3)＜0, then:
When source base station arrives at the TW1 duration, (be assumed to be T through specifying duration
DealDuration) process data into frame (Frame), and through T
B1Duration is sent to portable terminal;
When target BS 1 arrives at the TW2 duration, equally through T
DealDuration processes data into frame, and through T
B2Duration is sent to portable terminal, and T
B2With T
B1Between difference be Δ T
B1B2
When target BS 2 arrived at the TW3 duration, packet discard did not participate in grand diversity.
And portable terminal can advance to merge to the signal of source base station and target BS 1 transmission, thereby obtains the receive diversity gain.
With the embodiment of the invention one～three based on same inventive concept, following device and system is provided.
Embodiment four,
The embodiment of the invention four provides a kind of realization data synchronization system, and the structure of this system can be as shown in Figure 8, comprises each base station 13 in the Active Set of radio network controller 11, portable terminal 12 and this portable terminal correspondence, wherein:
Described portable terminal 12 is used for reporting each target BS of described Active Set and the transmission time difference of eating dishes without rice or wine between the source base station to described radio network controller, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station;
Described base station 13 is used for reporting the 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 transmits 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, determine the stand-by period with the lag time of this base station in the downlink data packet that receives, when the lag time of a base station represents that described radio network controller sends data to this base station, guarantee the required maximal adjustment time length of data sync, from receiving the moment of described downlink data packet, the described stand-by period, the synchrodata that radio network controller that receive in the described stand-by period, described is distributed sent to described portable terminal when arriving;
Described radio network controller 11 is used to receive described transmission time difference and the described downlink transfer time delay of eating dishes without rice or wine, at each base station in the described Active Set, determine the lag time of this base station according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine, and the lag time of this base station is sent to this base station by downlink data packet.
Embodiment five,
The embodiment of the invention five provides a kind of device of realizing data sync, and this device can be integrated in the radio network controller, and the structure of this device can comprise as shown in Figure 9:
Sending module 23 is used for sending to this base station by the lag time of downlink data packet each base station that determination module is definite, so that the downlink transfer time delay of current time when receiving downlink data packet, is determined in each base station in the described Active Set; And determine the stand-by period according to the lag time in the downlink transfer time delay of described current time and the downlink data packet that receives.
Described determination module 22 specifically is used for each base station at described Active Set, determines the downlink transfer time delay of this base station respectively, and the transmission time difference of eating dishes without rice or wine between this base station and the source base station and value; Determine the maximum in described and the value; At each base station in the described Active Set, respectively with described maximum, and the difference of the transmission time difference of eating dishes without rice or wine between this base station and the source base station is as the lag time of this base station.
Described determination module 22 also is used for determining after the maximum of described and value, determine before the lag time of base station, determine that whether described maximum is greater than specifying time delay, described appointment time delay is represented described radio network controller that the business of the current execution of described portable terminal can the tolerate maximum delay to described portable terminal transmission data, and time-delay when described maximum is not more than described appointment, keep described maximum constant, in the time time-delay of described maximum, described maximum is updated to described appointment time delay greater than described appointment.
Embodiment six,
The embodiment of the invention six provides a kind of device of realizing data sync, and this device can be integrated in the base station, and the structure of this device can comprise as shown in figure 10:
Sending module 33 was used in the moment that receives described downlink data packet from receiver module, the stand-by period that described determination module is determined, the synchrodata that radio network controller that receive in the described stand-by period, described is distributed sent to described portable terminal when arriving.
Described determination module 32 specifically is used for downlink transfer time delay poor of the lag time of 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 be used for when the transmitting time of described this downlink data packet of downlink data packet mark, transmitting time according to mark in the described downlink data packet that receives, and the time of reception of this downlink data packet, determine the downlink transfer time delay of current time.
Described sending module 33 specifically is used for being not less than at 0 o'clock in the described stand-by period, open up spatial cache storage synchrodata, from receiving the moment of described downlink data packet, the described stand-by period sends to portable terminal with the synchrodata of storing in the described spatial cache when arriving; The described stand-by period less than 0 o'clock, from receiving the moment of described downlink data packet, set in the duration and do not send synchrodata to portable terminal.
Those skilled in the art should understand that the application's embodiment can be provided as method, device, system or computer program.Therefore, the application can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the application can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The application is that reference is described according to the flow chart and/or the block diagram of method, device, equipment (system) and the computer program of the embodiment of the present application.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the application's preferred embodiment, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the application's scope.
Obviously, those skilled in the art can carry out various changes and modification and the spirit and scope that do not break away from the application to the application.Like this, if these of the application are revised and modification belongs within the scope of the application's claim and equivalent technologies thereof, then the application also is intended to comprise these changes and modification interior.
Claims (15)
1. a method that realizes data sync is characterized in that, described method comprises:
Radio network controller receives the downlink transfer time delay that each base station in the Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base station transmits data; And each target BS in the described Active Set that reports of mobile terminal receive and the transmission time difference of eating dishes without rice or wine between the source base station, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station;
Radio network controller is at each base station in the described Active Set, determine the lag time of this base station according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine, when the lag time of a base station represents that described radio network controller sends data to this base station, guarantee the required maximal adjustment time length of data sync, and the lag time of this base station is sent to this base station by downlink data packet, so that the downlink transfer time delay of current time when receiving downlink data packet, is determined in each base station in the described Active Set; And determine the stand-by period according to the lag time in the downlink transfer time delay of described current time and the downlink data packet that receives.
2. the method for claim 1 is characterized in that, radio network controller is at each base station in the described Active Set, determines specifically to comprise the lag time of this base station according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine:
Radio network controller is at each base station in the described Active Set, determines the downlink transfer time delay of this base station respectively, and the transmission time difference of eating dishes without rice or wine between this base station and the source base station and value;
Radio network controller is determined the maximum in described and the value;
Radio network controller is at each base station in the described Active Set, respectively with the difference of the transmission time difference of eating dishes without rice or wine between described maximum and this base station and the source base station lag time as this base station.
3. method as claimed in claim 2 is characterized in that, radio network controller determines that radio network controller determines that before the lag time of base station, described method also comprises after the maximum in the described and value:
Radio network controller determines that whether described maximum is greater than specifying time delay, described appointment time delay is represented described radio network controller that the business of the current execution of described portable terminal can the tolerate maximum delay to described portable terminal transmission data, and time-delay when described maximum is not more than described appointment, keep described maximum constant, in the time time-delay of described maximum, described maximum is updated to described appointment time delay greater than described appointment.
4. a method that realizes data sync is characterized in that, described method comprises:
The base station receives the downlink data packet of the lag time that carries this base station, when the lag time of a base station represents that radio network controller sends data to this base station, guarantee the required maximal adjustment time length of data sync, and the downlink transfer time delay of definite current time;
The base station is according to the downlink transfer time delay of described current time, determine the stand-by period with the lag time in the downlink data packet that receives, from receiving the moment of described downlink data packet, the described stand-by period when arriving sends synchrodata that receive in the described stand-by period, the radio network controller distribution;
Wherein, described lag time is that radio network controller receives the downlink transfer time delay that each base station in the Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base station transmits data; And each target BS in the described Active Set that reports of mobile terminal receive and the transmission time difference of eating dishes without rice or wine between the source base station, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station; Determine according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine.
5. method as claimed in claim 4 is characterized in that, the stand-by period is determined according to the lag time in the downlink transfer time delay of described current time and the downlink data packet that receives in the base station, specifically comprises:
The base station is poor with the downlink transfer time delay of lag time in the downlink data packet that receives and described current time, is defined as the stand-by period.
6. method as claimed in claim 4, it is characterized in that the base station is from receiving the moment of described downlink data packet, the described stand-by period is when arriving, synchrodata that receive in the described stand-by period, the radio network controller distribution is sent, specifically comprises:
The base station is not less than at 0 o'clock in the described stand-by period, opens up spatial cache storage synchrodata, and from receiving the moment of described downlink data packet, the described stand-by period sends to portable terminal with the synchrodata of storing in the described spatial cache when arriving;
The base station the described stand-by period less than 0 o'clock, from receiving the moment of described downlink data packet, set in the duration and do not send synchrodata to portable terminal.
7. as the arbitrary described method of claim 4～6, it is characterized in that, the transmitting time of this downlink data packet of mark in the described downlink data packet, then the downlink transfer time delay of current time is determined in the base station, specifically comprises:
The base station is according to the transmitting time of mark in the described downlink data packet that receives, and the time of reception of this downlink data packet, determines the downlink transfer time delay of current time.
8. a device of realizing data sync is characterized in that, described device comprises:
Receiver module is used for receiving the downlink transfer time delay that each base station of an Active Set reports, and described downlink transfer time delay is the propagation delay time of radio network controller to base station transmits data; And each target BS in the described Active Set that reports of mobile terminal receive and the transmission time difference of eating dishes without rice or wine between the source base station, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station;
Determination module, be used for each base station at described Active Set, the lag time that described downlink transfer time delay that receives according to receiver module and the described transmission time difference of eating dishes without rice or wine are determined this base station, when the lag time of a base station represents that described radio network controller sends data to this base station, guarantee the required maximal adjustment time length of data sync;
Sending module is used for sending to this base station by the lag time of downlink data packet each base station that determination module is definite, so that the downlink transfer time delay of current time when receiving downlink data packet, is determined in each base station in the described Active Set; And determine the stand-by period according to the lag time in the downlink transfer time delay of described current time and the downlink data packet that receives.
9. device as claimed in claim 8 is characterized in that, described determination module specifically is used for each base station at described Active Set, determines the downlink transfer time delay of this base station respectively, and the transmission time difference of eating dishes without rice or wine between this base station and the source base station and value; Determine the maximum in described and the value; At each base station in the described Active Set, respectively with described maximum, and the difference of the transmission time difference of eating dishes without rice or wine between this base station and the source base station is as the lag time of this base station.
10. device as claimed in claim 9, it is characterized in that, described determination module, also be used for determining after the maximum of described and value, determine before the lag time of base station, determine that whether described maximum is greater than specifying time delay, described appointment time delay is represented described radio network controller that the business of the current execution of described portable terminal can the tolerate maximum delay to described portable terminal transmission data, and time-delay when described maximum is not more than described appointment, keep described maximum constant, in the time time-delay of described maximum, described maximum is updated to described appointment time delay greater than described appointment.
11. a device of realizing data sync is characterized in that, described device comprises:
Receiver module is used to receive the downlink data packet of the lag time that carries a base station, when the lag time of a base station represents that radio network controller sends data to this base station, guarantees the required maximal adjustment time length of data sync; Wherein, described lag time is that radio network controller receives the downlink transfer time delay that each base station in the Active Set reports, and described downlink transfer time delay is the propagation delay time of described radio network controller to base station transmits data; And each target BS in the described Active Set that reports of mobile terminal receive and the transmission time difference of eating dishes without rice or wine between the source base station, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station; Determine according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine;
Determination module is used for determining the downlink transfer time delay of described base station current time, and the lag time in the downlink data packet that receives according to the downlink transfer time delay and the receiver module of described current time is determined the stand-by period;
Sending module, be used in the moment that receives described downlink data packet from receiver module, the stand-by period that described determination module is determined, the synchrodata that radio network controller that receive in the described stand-by period, described is distributed sent to described portable terminal when arriving.
12. device as claimed in claim 11 is characterized in that, described determination module specifically is used for downlink transfer time delay poor of the lag time of the downlink data packet that will receive and described current time, is defined as the stand-by period.
13. device as claimed in claim 11, it is characterized in that, described sending module, specifically be used for being not less than at 0 o'clock in the described stand-by period, open up spatial cache storage synchrodata, from receiving the moment of described downlink data packet, the described stand-by period sends to portable terminal with the synchrodata of storing in the described spatial cache when arriving; The described stand-by period less than 0 o'clock, from receiving the moment of described downlink data packet, set in the duration and do not send synchrodata to portable terminal.
14. as the arbitrary described device of claim 11～13, it is characterized in that, described determination module, specifically be used for when the transmitting time of described this downlink data packet of downlink data packet mark, transmitting time according to mark in the described downlink data packet that receives, and the time of reception of this downlink data packet, determine the downlink transfer time delay of current time.
15. realize for one kind it is characterized in that data synchronization system, described system comprises each base station in the Active Set of radio network controller, portable terminal and this portable terminal correspondence, wherein:
Described portable terminal, be used for reporting each target BS of described Active Set and the transmission time difference of eating dishes without rice or wine between the source base station to described radio network controller, transmission time difference of eating dishes without rice or wine is described portable terminal according to a target BS to the eating dishes without rice or wine the transmission time of described portable terminal transmission data, determines to the difference in the transmission time of eating dishes without rice or wine of described portable terminal transmission data with source base station;
Described base station is used for reporting the 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 transmits 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, determine the stand-by period with the lag time of this base station in the downlink data packet that receives, when the lag time of a base station represents that described radio network controller sends data to this base station, guarantee the required maximal adjustment time length of data sync, from receiving the moment of described downlink data packet, the described stand-by period, the synchrodata that radio network controller that receive in the described stand-by period, described is distributed sent to described portable terminal when arriving;
Described radio network controller, be used to receive described transmission time difference and the described downlink transfer time delay of eating dishes without rice or wine, at each base station in the described Active Set, determine the lag time of this base station according to described downlink transfer time delay and the described transmission time difference of eating dishes without rice or wine, and the lag time of this base station is sent to this base station by downlink data packet.
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Address after: 510663 No. 10 Shenzhou Road, Science City, Luogang District, Guangzhou, Guangdong Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 No. 10 Shenzhou Road, Science City, Luogang District, Guangzhou, Guangdong Patentee before: COMBA TELECOM SYSTEMS (CHINA) Ltd. |
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