CN102325366B - Data synchronization method, system and device - Google Patents
Data synchronization method, system and device Download PDFInfo
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- CN102325366B CN102325366B CN201110135188.7A CN201110135188A CN102325366B CN 102325366 B CN102325366 B CN 102325366B CN 201110135188 A CN201110135188 A CN 201110135188A CN 102325366 B CN102325366 B CN 102325366B
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Abstract
The invention discloses a data synchronization method, a system and a device, relating to a communication technology. RRUs (Radio Remote Units) are grouped, and data can be stored in each RRU only within the time when the sum of the remote time delay of the RRU and the buffering time reaches the set time delay of the corresponding group. The quantity of data to be buffered by the RRU is reduced greatly, and difficulties in realization of the RRU are reduced. Meanwhile, the BBU (Base Band Unit) only needs to respectively process each group, data reception and processing based on the remote time delay of each RRU are not needed, and difficulties in BBU processing are also reduced.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of method of data synchronization, system and device.
Background technology
Zoom out (the Base-Band Unit of BBU in type base station, baseband signal processing unit) generally can access each RRU (RRU Remote Radio Unit with star-like and cascade system, Remote Radio Unit) equipment, in system, the data demand of each RRU antenna reception and transmitting is synchronous.The length that zooms out optical fiber due to each RRU and BBU in system is incomplete same, complete RRU antenna opening transceiving data synchronous, in down link, need RRU or BBU after data buffer storage alignment, to send to antenna, and in up link, each RRU antenna receives after data at synchronization, needs alignment to pass to BBU, or is received respectively and calculated the data of each RRU by BBU.
Have at present two kinds of modes to carry out alignment of data:
Existing scheme one: the RRU scheme of aliging:
This scheme is carried out buffer memory to data by each RRU in equipment, and the assurance BBU transmission data moment is fixed as antenna delivery time system maximum fiber time delay in advance, and the BBU reception data moment is fixed as hysteresis antenna reception moment maximum fiber time delay.
In down link, BBU zooms out time delay corresponding to distance according to system maximum and in advance the data of each RRU is sent to RRU, zoom out apart from the difference of the time delay of time delay and optical fiber link actual consumption data are carried out to buffer memory according to maximum by each RRU, all receive after corresponding data until each RRU, then data complete buffer memory are sent to antenna by unification;
In up link, the antenna of each RRU receives data simultaneously, RRU zooms out apart from the difference of the time delay of time delay and optical fiber link actual consumption data is carried out to buffer memory according to maximum, again the data after buffer memory are sent to BBU, make through actual optical fiber link time delay, BBU can receive each RRU data simultaneously, and this moment is that antenna reception data moment hysteresis maximum zooms out apart from time delay.
As shown in Figure 1, zooming out distance at maximum fiber is in the system of 40 kilometers, the upper cascade of BBU RRU0～3, RRU5～8, the star-like RRU4 that connected, wherein between RRU0 and BBU, fiber distance is 10km, the fiber distance between RRU1～RRU3 and RRU7～8 and higher level RRU is 10km, fiber distance between RRU4 and BBU is 0km, and the fiber distance of RRU5 and RRU6 and BBU is respectively 9km and 7km.In up link, in order to guarantee to receive after BBU hysteresis 40km optical-fiber time-delay the upstream data of nine RRU simultaneously, RRU0, RRU1 and RRU2 need respectively after local data buffer storage 30km, 20km and 10km optical-fiber time-delay, to issue BBU again, RRU5～8 need respectively buffer memory 31km, 24km, 14km and 4km optical-fiber time-delay, RRU4 need to will issue BBU after local data buffer storage 40km optical fiber, and the data that final assurance arrives BBU are all unified the optical-fiber time-delay time of hysteresis antenna reception data moment 40km.In like manner, in down link, BBU shifts to an earlier date antenna transmission data moment 40km optical-fiber time-delay and sends the data to each RRU, data are received through 10km, 20km and 30km respectively in RRU0～2, need again to send the data to again antenna after buffer memory 30km, 20km and 10km in this locality, data are received through 0km, 9km, 16km and 26km respectively in RRU4～7, need after buffer memory 40km, 31km, 24km and 14km, to send the data to antenna again in this locality again, finally guarantee that each RRU antenna data sends simultaneously.
Zooming out distance for maximum is the system of 40km, for guarantee nearest RRU antenna receiving-sending data can and system in other RRU synchronous, uplink downlink respectively need to send to BBU or antenna again by data buffer storage maximum 40km optical-fiber time-delay.Because RRU specification in producing is certain, so need every RRU equipment all to possess the ability of the optical-fiber time-delay data of the each buffer memory 40km of up-downgoing.
Therefore, this alignment of data method is higher to the buffer memory Capability Requirement of RRU equipment, and what increased RRU realizes difficulty and hardware cost.
Existing scheme two: the BBU scheme of aliging
The hardware cost that this scheme consumes in order to reduce the buffer memory of RRU equipment, each RRU uplink downlink does not all carry out buffer memory to the data that receive, send or receive the moment point of RRU data by BBU according to the optical-fiber time-delay of each RRU apart from adjustment, guarantee that each RRU is without the synchronously data of dual-mode antenna of buffer memory alignment.
Still with reference to Fig. 1, up link, BBU receives the data of not passing through time delay from RRU4, receive that RRU0～3 postpone respectively 10km, 20km, 30km and 40km, RRU5～8 postpone respectively the optical-fiber time-delay of 9km, 16km, 26km and 36km, and the moment that BBU need to arrive according to data starts respectively the processing that each RRU is received to data.Down link, in order to guarantee that data arrive RRU antenna simultaneously, BBU need to shift to an earlier date the data of antenna delivery time 10km, 20km, 30km and 40km transmission RRU0～3, and antenna delivery time 9km, 16km, 26km and 36km send the data of RRU5～8 in advance.
Because BBU need to carry out time delay processing for each RRU, so the RRU number of the upper cascade of BBU is more, the time delay that BBU need to consider is just more.This scheme can reduce the hardware cost of RRU, but the processing complexity of BBU increases along with the increase of the RRU number of access BBU.
Summary of the invention
The embodiment of the present invention provides a kind of method of data synchronization, system and device, to realize the hardware cost of controlling RRU the processing complexity of controlling BBU.
In up link, the embodiment of the present invention provides a kind of method of data synchronization, comprising:
Radio frequency remote unit RRU from antenna reception to data after, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of described RRU, send described data to baseband signal processing unit BBU, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes;
Described BBU is the data of RRU in the corresponding time point of setting time delay time value of each grouping receives each grouping respectively, and the data that receive are processed.
In down link, the embodiment of the present invention provides a kind of method of data synchronization, comprising:
Baseband signal processing unit BBU determines after antenna delivery time, and the relatively described antenna delivery time respectively setting time delay value of each grouping in advance sends data to the radio frequency remote unit RRU in respective packets;
Described RRU is receiving after the data of described BBU transmission, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of described RRU, send described data to antenna, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes.
In up link, the embodiment of the present invention is corresponding provides a kind of data synchronous system, comprising: baseband signal processing unit BBU is connected the radio frequency remote unit RRU of described BBU with star or cascade system with at least one, wherein:
Described RRU, after from antenna reception to data, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of described RRU, send described data to described BBU, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes;
Described BBU, for receive respectively the data of each grouping RRU transmission at the corresponding time point of setting time delay time value of each grouping, and processes the data that receive.
In down link, the embodiment of the present invention is corresponding provides a kind of data synchronous system, comprising: baseband signal processing unit BBU is connected the radio frequency remote unit RRU of described BBU with star or cascade system with at least one, wherein:
Described BBU, for determining antenna delivery time, and relatively described antenna delivery time respectively the setting time delay value of in advance each grouping send data to the RRU in respective packets;
Described RRU, for receiving after the data of described BBU transmission, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of described RRU, send described data to antenna, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes.
In up link, the embodiment of the present invention is corresponding provides a kind of data synchronization unit, comprising:
Antenna reception unit, for from antenna reception data;
BBU buffer memory transmitting element, the data that receive for antenna reception unit described in buffer memory until radio frequency remote unit RRU zoom out apart from time delay and cache-time and reach after the setting time delay value dividing into groups at place, send described data to baseband signal processing unit BBU, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes.
In up link, the embodiment of the present invention also provides a kind of data synchronization unit, comprising:
RRU receiving element, for receiving respectively the data of each grouping radio frequency remote unit RRU transmission at the corresponding time point of setting time delay value of each grouping;
Processing unit, for processing the data that receive.
In down link, the embodiment of the present invention is corresponding provides a kind of data synchronization unit, comprising:
BBU receiving element, the data that send for receiving described baseband signal processing unit BBU;
Antenna buffer memory transmitting element, the data that receive for BBU receiving element described in buffer memory until radio frequency remote unit RRU zoom out apart from time delay and cache-time and reach after the setting time delay value dividing into groups at place, send described data to antenna, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes.
In down link, the embodiment of the present invention also provides a kind of data synchronization unit, comprising:
Determining unit, for determining antenna delivery time;
RRU transmitting element, the setting time delay value that shifts to an earlier date respectively each grouping for relatively described antenna delivery time sends data to the radio frequency remote unit RRU in respective packets.
The embodiment of the present invention provides a kind of method of data synchronization, system and device, RRU is divided into groups, so what the time that each RRU need to store data only need to this RRU zooms out apart from setting time delay value time delay and cache-time and that reach place grouping, greatly reduce the data volume of the required buffer memory of RRU, reduce the difficulty that realizes of RRU, simultaneously, BBU only need to process respectively each grouping, and do not need to receive and deal with data apart from time delay according to zooming out of each RRU, also reduce the processing complexity of BBU.
Accompanying drawing explanation
Fig. 1 is remote base station structural representation in prior art;
The alignment of data method flow diagram of the up link that Fig. 2 provides for the embodiment of the present invention;
The alignment of data method flow diagram of the down link that Fig. 3 provides for the embodiment of the present invention;
The alignment of data system configuration schematic diagram that Fig. 4 provides for the embodiment of the present invention;
One of alignment of data apparatus structure schematic diagram of the up link that Fig. 5 provides for the embodiment of the present invention;
Two of the alignment of data apparatus structure schematic diagram of the up link that Fig. 6 provides for the embodiment of the present invention;
One of alignment of data apparatus structure schematic diagram of the down link that Fig. 7 provides for the embodiment of the present invention;
Two of the alignment of data apparatus structure schematic diagram of the down link that Fig. 8 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of method of data synchronization, system and device, in up link, RRU from antenna reception to data after, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and described cache-time and that reach place grouping of described RRU, send described data to BBU, BBU is the data of RRU in the corresponding time point of setting time delay time value of each grouping receives each grouping respectively, and the data that receive are processed.In down link, BBU determines after antenna delivery time, and the relatively described antenna delivery time respectively setting time delay value of each grouping in advance sends data to the RRU in respective packets; RRU is receiving after the data of described BBU transmission, and these data of buffer memory are until zooming out apart from after setting time delay value time delay and described cache-time and that reach place grouping of described RRU sends described data to antenna.Due to RRU is divided into groups, so need to storing the time of data, each RRU greatly reduces, reduce the difficulty that realizes of RRU, meanwhile, BBU only need to process respectively each grouping, has also reduced the processing complexity of BBU.
As shown in Figure 2, in up link, carry out the synchronous method of data and comprise:
Step S201, RRU from antenna reception to data after, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of this RRU, send data to BBU, wherein, zooming out apart from time delay is the data transmission delay that the distance between RRU and BBU causes;
Step S202, BBU be the data of RRU in the corresponding time point of setting time delay time value of each grouping receives each grouping respectively, and the data that receive are processed.
In step S201, each RRU in a grouping, receiving after the data of antenna transmission, sends after these data of buffer memory, makes BBU to receive the data that in this grouping, each RRU sends at a time point.
Because BBU only need to receive and deal with data in the time that the data of each grouping transmission arrive, and do not need to receive and deal with data apart from time delay according to zooming out of each RRU, therefore, reduced the processing complexity of BBU.And the cache-time of RRU only need to this RRU zoom out apart from setting time delay value time delay and cache-time and that reach place grouping, do not need zooming out apart from time delay and cache-time and maximum that reach in all RRU of this RRU to zoom out apart from time delay, so reduced the cache-time of RRU.
As shown in Figure 3, in down link, the method for data synchronization that the embodiment of the present invention provides comprises:
Step S301, BBU determine after antenna delivery time, relatively antenna delivery time respectively the setting time delay value of each grouping in advance send data to the RRU in respective packets;
Step S302, RRU are receiving after the data of BBU transmission, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of RRU, send data to antenna, wherein, zooming out apart from time delay is the data transmission delay that the distance between RRU and BBU causes.
Like this, BBU sends the data of each RRU in a grouping simultaneously, and each RRU is receiving after data, these data of buffer memory, and send to antenna in the data of naming a person for a particular job at the same time, realize data synchronous.Because BBU sends the data of each RRU in a grouping simultaneously, so reduced the processing complexity of BBU, and the time of these data of RRU buffer memory be no more than in each grouping zoom out apart from the RRU of time delay maximum with zoom out the zooming out apart from delay inequality of the RRU the shortest apart from time delay, also reduced the buffer memory difficulty of RRU.
For making BBU to receive and dispatch the data that in this grouping, each RRU sends at a time point, setting time delay value can not be less than and in grouping, zoom out zooming out apart from time delay value apart from the RRU of time delay maximum, in order further to reduce the cache-time of each RRU, the setting time delay value that can set each grouping is respectively, and zooms out zooming out apart from time delay value apart from the RRU of time delay maximum in grouping.
In the time dividing into groups, assign to one group by zooming out the RRU close apart from time delay value as far as possible, thereby further reduce the cache-time of RRU, when concrete enforcement, can set a value, and stipulate in each grouping zoom out apart from the RRU of time delay maximum with zoom out zooming out apart from delay inequality of the RRU the shortest apart from time delay and be no more than this predefined value, like this, the longest cache-time of the RRU in grouping can not exceed this predefined value yet.Like this, the specification of each RRU is unified, and is more convenient to produce implement.
Describe with a concrete example below, as shown in Figure 4, zoom out in the system of distance for 40km at maximum fiber, BBU calculates zooming out after distance of RRU and BBU, far and near according to zooming out distance, each RRU is divided into 0～10km, in these four groups of 10～20km, 20～30km and 30～40km, in first group of RRU, the fiber optic stretch distance of each RRU and base station is between 0～10km, and in second group of RRU, the fiber optic stretch distance of each RRU and base station is between 10～20km, in the 3rd group of RRU, the distance of each RRU and base station is between 30～40km.Each RRU zooms out apart from time delay and carries out alignment of data according to maximum in group, and for example in 0～10km group, all RRU carry out all RRU in alignment of data, 10～20km group according to the time delay of 10km and carry out alignment of data according to the time delay of 20km, so analogize.Because the distance that zooms out of every group is 10km, so being 10km, each RRU largest buffered data volume draw the data volume of remote time delay just enough.
In up link, the data that all RRU arrive BBU have postponed respectively zooming out apart from time delay of 10km, 20km, 30km and 40km according to grouping, and BBU can, according to set grouping, receive at different time points the data that each group of RRU sends.In down link, BBU is according to set grouping, zooming out apart from time delay of 10km, 20km, 30km and 40km sends each group of data in advance respectively, each RRU receives after data, zoom out apart from time delay according to the maximum of this group, the interior maximum of buffered packet zooms out after the difference apart from the time delay of time delay and optical fiber link actual consumption, sends the data to antenna, thus each RRU antenna synchronized transmission data in assurance system.
Concrete, in up link, in first group, RRU0 is buffer memory not, directly send from the data of antenna reception, RRU4 and RRU5 respectively by the data buffer storage 10km from antenna reception and 1km zoom out apart from time delay, these data are sent to BBU, guarantee that data and RRU0 arrive BBU simultaneously; In second group, RRU1 is buffer memory not, directly send from the data of antenna reception, RRU6 by the data buffer storage 6km from antenna reception zoom out apart from time delay, these data are sent to BBU, guarantee that data and RRU1 arrive BBU simultaneously; In the 3rd group, RRU2 is buffer memory not, directly send from the data of antenna reception, RRU7 by the data buffer storage 3km from antenna reception zoom out apart from time delay, these data are sent to BBU, guarantee that data and RRU2 arrive BBU simultaneously; In the 4th group, RRU3 is buffer memory not, directly send from the data of antenna reception, RRU8 by the data buffer storage 3km from antenna reception zoom out apart from time delay, these data are sent to BBU, guarantee that data and RRU3 reach BBU simultaneously.All RRU are according to the difference of grouping, and the moment that arrives BBU is respectively to postpone 10km, 20km, 30km and 40km optical-fiber time-delay.
In down link, the RRU data of first to fourth group are sent to each RRU by 10km, 20km, 30km and 40km optical-fiber time-delay to BBU in advance respectively, in first group, RRU0 receives after this RRU data, directly be sent to antenna, RRU4 and RRU5 receive after this RRU data, and zooming out apart from time delay of buffer memory 10km and 1km sends to antenna more respectively; In second group, RRU1 receives after this RRU data, is directly sent to antenna, and RRU6 receives that, after this RRU data, buffer memory 6km zooms out apart from time delay and sends to antenna again; In the 3rd group, RRU2 receives after this RRU data, is directly sent to antenna, and RRU7 receives after this RRU data, and zooming out apart from time delay of buffer memory 3km sends to antenna again; In the 4th group, RRU3 receives after this RRU data, is directly sent to antenna, and RRU8 receives after this RRU data, buffer memory 3km zoom out apart from time delay and send the data to antenna.The dual-mode antenna data that so just guaranteed all RRU are synchronous.
As shown in Figure 4, corresponding uplink data synchronous method, the embodiment of the present invention also provides a kind of data synchronous system, comprising: BBU401 is connected the RRU402 of BBU401 with star or cascade system with at least one, wherein:
RRU402, after from antenna reception to data, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of RRU402, send data to BBU401, wherein, zooming out apart from time delay is the data transmission delay that the distance between RRU402 and BBU401 causes;
BBU401, for receive respectively the data of each grouping RRU402 transmission at the corresponding time point of setting time delay time value of each grouping, and processes the data that receive.
Corresponding down link data synchronous method, the embodiment of the present invention also provides a kind of data synchronous system, comprising: BBU401 is connected the RRU402 of BBU401 with star or cascade system with at least one, wherein:
BBU401, for determining antenna delivery time, and relatively antenna delivery time respectively the setting time delay value of each grouping in advance send data to the RRU402 in respective packets;
RRU402, for receiving after the data of BBU401 transmission, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of RRU402, send data to antenna, zooming out apart from time delay is the data transmission delay that the distance between RRU402 and BBU401 causes.
As shown in Figure 5, corresponding uplink data synchronous method, the embodiment of the present invention provides a kind of data synchronization unit, and this device can be specially RRU, and this device comprises:
Antenna reception unit 501, for from antenna reception data;
BBU buffer memory transmitting element 502, be used for the data of buffer memory antenna reception unit reception until zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of RRU, send data to BBU, zooming out apart from time delay is the data transmission delay that the distance between RRU and BBU causes.
As shown in Figure 6, corresponding uplink data synchronous method, the embodiment of the present invention provides a kind of data synchronization unit, and this device can be specially BBU, and this device comprises:
RRU receiving element 601, for receiving respectively the data of each grouping RRU transmission at the corresponding time point of setting time delay time value of each grouping;
Processing unit 602, for processing the data that receive.
As shown in Figure 7, corresponding down link data synchronous method, the embodiment of the present invention provides a kind of data synchronization unit, and this device can be specially RRU, and this device comprises:
BBU receiving element 701, the data that send for receiving BBU;
Antenna buffer memory transmitting element 702, be used for the data of buffer memory BBU receiving element reception until zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of RRU, send data to antenna, zooming out apart from time delay is the data transmission delay that the distance between RRU and BBU causes.
As shown in Figure 8, corresponding down link data synchronous method, the embodiment of the present invention provides a kind of data synchronization unit, and this device can be specially BBU, and this device comprises:
Determining unit 801, for determining antenna delivery time;
RRU transmitting element 802, the setting time delay value that shifts to an earlier date respectively each grouping for relative antenna delivery time sends data to the RRU in respective packets.
The embodiment of the present invention is by dividing into groups RRU to the fiber distance of BBU according to RRU, RRU adjusts respectively the data buffer storage time delay of uplink downlink according to grouping situation and actual fiber distance, guarantee that BBU only receives and send the data of each group of RRU in different moment point according to grouping situation; And maximum zooms out that just to reach the transceiving data of antenna apart from delay inequality synchronous in the maximum buffer memory groups of each RRU.
The system that zooms out distance, cascade level Four, tri-light mouths of every BBU take maximum 40km is as example, only there is RRU to carry out the synchronous method comparison of data, the method of data synchronization that the embodiment of the present invention provides has reduced the maximum data buffer memory of RRU, zoom out and be reduced to the each 10km of uplink downlink apart from the data buffer storage amount of time delay and zoom out the data buffer storage amount apart from time delay by the each 40km of uplink downlink, save hardware cost.Only carrying out the synchronous method of data by BBU compares, the data that the method for data synchronization that the embodiment of the present invention provides makes BBU receive and dispatch each group of RRU according to 4 moment point respectively according to grouping situation, just can complete the processing to all RRU data, avoid carrying out respectively data transmit-receive for zooming out apart from time delay of 12 RRU, reduced the processing complexity of BBU.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (8)
1. a method of data synchronization, is characterized in that, comprising:
Radio frequency remote unit RRU from antenna reception to data after, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of described RRU, send described data to baseband signal processing unit BBU, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes;
Described BBU is the data of RRU in the corresponding time point of setting time delay time value of each grouping receives each grouping respectively, and the data that receive are processed;
Wherein, the setting time delay value of described grouping is, zooms out zooming out apart from time delay value apart from the RRU of time delay maximum in described grouping; In each grouping zoom out apart from the RRU of time delay maximum with zoom out zooming out apart from delay inequality of the RRU the shortest apart from time delay and be no more than predefined value.
2. a method of data synchronization, is characterized in that, comprising:
Baseband signal processing unit BBU determines after antenna delivery time, and the relatively described antenna delivery time respectively setting time delay value of each grouping in advance sends data to the radio frequency remote unit RRU in respective packets;
Described RRU is receiving after the data of described BBU transmission, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of described RRU, send described data to antenna, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes;
Wherein, the setting time delay value of described grouping is, zooms out zooming out apart from time delay value apart from the RRU of time delay maximum in described grouping; In each grouping zoom out apart from the RRU of time delay maximum with zoom out zooming out apart from delay inequality of the RRU the shortest apart from time delay and be no more than predefined value.
3. a data synchronous system, is characterized in that, comprising: baseband signal processing unit BBU is connected the radio frequency remote unit RRU of described BBU with star or cascade system with at least one, wherein:
Described RRU, after from antenna reception to data, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of described RRU, send described data to described BBU, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes;
Described BBU, for receive respectively the data of each grouping RRU transmission at the corresponding time point of setting time delay time value of each grouping, and processes the data that receive;
Wherein, the setting time delay value of described grouping is, zooms out zooming out apart from time delay value apart from the RRU of time delay maximum in described grouping; In each grouping zoom out apart from the RRU of time delay maximum with zoom out zooming out apart from delay inequality of the RRU the shortest apart from time delay and be no more than predefined value.
4. a data synchronous system, is characterized in that, comprising: baseband signal processing unit BBU is connected the radio frequency remote unit RRU of described BBU with star or cascade system with at least one, wherein:
Described BBU, for determining antenna delivery time, and relatively described antenna delivery time respectively the setting time delay value of in advance each grouping send data to the RRU in respective packets;
Described RRU, for receiving after the data of described BBU transmission, these data of buffer memory are until the zooming out apart from after setting time delay value time delay and cache-time and that reach place grouping of described RRU, send described data to antenna, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes;
Wherein, the setting time delay value of described grouping is, zooms out zooming out apart from time delay value apart from the RRU of time delay maximum in described grouping; In each grouping zoom out apart from the RRU of time delay maximum with zoom out zooming out apart from delay inequality of the RRU the shortest apart from time delay and be no more than predefined value.
5. a data synchronization unit, is characterized in that, comprising:
Antenna reception unit, for from antenna reception data;
BBU buffer memory transmitting element, the data that receive for antenna reception unit described in buffer memory until radio frequency remote unit RRU zoom out apart from time delay and cache-time and reach after the setting time delay value dividing into groups at place, send described data to baseband signal processing unit BBU, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes;
Wherein, the setting time delay value of described grouping is, zooms out zooming out apart from time delay value apart from the RRU of time delay maximum in described grouping; In each grouping zoom out apart from the RRU of time delay maximum with zoom out zooming out apart from delay inequality of the RRU the shortest apart from time delay and be no more than predefined value.
6. a data synchronization unit, is characterized in that, comprising:
RRU receiving element, for receiving respectively the data of each grouping radio frequency remote unit RRU transmission at the corresponding time point of setting time delay value of each grouping;
Processing unit, for processing the data that receive;
Wherein, the setting time delay value of described grouping is, zooms out zooming out apart from time delay value apart from the RRU of time delay maximum in described grouping; In each grouping zoom out apart from the RRU of time delay maximum with zoom out zooming out apart from delay inequality of the RRU the shortest apart from time delay and be no more than predefined value.
7. a data synchronization unit, is characterized in that, comprising:
BBU receiving element, the data that send for receiving described baseband signal processing unit BBU;
Antenna buffer memory transmitting element, the data that receive for BBU receiving element described in buffer memory until radio frequency remote unit RRU zoom out apart from time delay and cache-time and reach after the setting time delay value dividing into groups at place, send described data to antenna, described in to zoom out apart from time delay be the data transmission delay that the distance between RRU and described BBU causes;
Wherein, the setting time delay value of described grouping is, zooms out zooming out apart from time delay value apart from the RRU of time delay maximum in described grouping; In each grouping zoom out apart from the RRU of time delay maximum with zoom out zooming out apart from delay inequality of the RRU the shortest apart from time delay and be no more than predefined value.
8. a data synchronization unit, is characterized in that, comprising:
Determining unit, for determining antenna delivery time;
RRU transmitting element, the setting time delay value that shifts to an earlier date respectively each grouping for relatively described antenna delivery time sends data to the radio frequency remote unit RRU in respective packets;
Wherein, the setting time delay value of described grouping is, zooms out zooming out apart from time delay value apart from the RRU of time delay maximum in described grouping; In each grouping zoom out apart from the RRU of time delay maximum with zoom out zooming out apart from delay inequality of the RRU the shortest apart from time delay and be no more than predefined value.
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| CN104768165B (en) * | 2012-03-09 | 2019-04-26 | 华为技术有限公司 | The method of signal covering and base station |
| CN103109557A (en) * | 2012-09-13 | 2013-05-15 | 华为技术有限公司 | Data transmission method and device |
| CN104754724B (en) * | 2013-12-30 | 2018-12-04 | 上海诺基亚贝尔股份有限公司 | It is a kind of to realize clock synchronous method, apparatus and equipment in wireless access network |
| CN105407506B (en) * | 2014-09-16 | 2019-03-01 | 成都鼎桥通信技术有限公司 | A kind of the upstream data receiving handling method and device of RRU |
| CN105610508B (en) * | 2014-11-24 | 2019-03-15 | 普天信息技术有限公司 | The downlink optical fiber delay compensation method and device of LTE cell combining |
| WO2016090644A1 (en) * | 2014-12-12 | 2016-06-16 | 华为技术有限公司 | Device, communication system and base station collaborative management method |
| CN106375014B (en) * | 2015-07-22 | 2019-12-03 | 上海中兴软件有限责任公司 | A kind of BBU-RRU time delay setting method and device |
| CN109151920B (en) * | 2017-06-16 | 2021-07-20 | 成都鼎桥通信技术有限公司 | Method for transmitting synchronization signal and base station |
| CN109640334A (en) * | 2017-10-09 | 2019-04-16 | 大唐移动通信设备有限公司 | A kind of method for transmitting signals and equipment |
| CN108075874B (en) * | 2017-12-22 | 2020-04-28 | 上海华为技术有限公司 | Resource scheduling method and base station |
| US20230036874A1 (en) * | 2019-12-17 | 2023-02-02 | Nippon Telegraph And Telephone Corporation | Base station apparatus, communication method, and aggregate station apparatus |
| CN112714490B (en) * | 2020-12-29 | 2022-07-29 | 京信网络系统股份有限公司 | Time delay calibration method, time delay calibration device, computer equipment and computer readable storage medium |
| CN112867133B (en) * | 2020-12-31 | 2022-12-23 | 京信网络系统股份有限公司 | Method for acquiring time delay adjustment amount and distributed base station |
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