CN104812049A - Method and equipment for synchronization between base stations - Google Patents
Method and equipment for synchronization between base stations Download PDFInfo
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- CN104812049A CN104812049A CN201410035839.9A CN201410035839A CN104812049A CN 104812049 A CN104812049 A CN 104812049A CN 201410035839 A CN201410035839 A CN 201410035839A CN 104812049 A CN104812049 A CN 104812049A
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- H04W56/001—Synchronization between nodes
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Abstract
The invention discloses a method and a piece of equipment for synchronization between base stations. The method comprises the following steps: acquiring synchronization configuration information of a synchronization source base station, wherein the synchronization configuration information contains guard period GP information of a special sub frame used for bearing a synchronization signal of the synchronization source base station; and receiving a synchronization signal sent by the synchronization source base station according to the GP information of the special sub frame contained in the synchronization configuration information, and maintaining clock synchronization with the synchronization source base station by using the received synchronization signal. The synchronization source base station uses the GP information of the special sub frame to bear the synchronization signal, and a base station to be synchronized uses the synchronization configuration information of the synchronization source base station to acquire the synchronization signal. Thus, clock synchronization between base stations with different levels of synchronization is realized, the problem of poor synchronization relay capability between base stations with different levels of synchronization is avoided, and the efficiency of synchronization between base stations with different levels of synchronization is improved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of based on LTE TDD(Long TermEvolution Time Division Duplex, long-term advancing time division duplex) method and apparatus synchronous between system base-station.
Background technology
In order to suppress the signal disturbing between base station, with the TDD(Time Division Duplex frequently disposed, time division duplex) base station needs to carry out clock synchronous between base station.At 3GPP(3rd Generation PartnershipProject, 3G (Third Generation) Moblie standardization body) in define clock synchronization scheme between 3 kinds of base stations:
Between the first base station, clock synchronization scheme is: based on GNSS(Global Navigation SatelliteSystem, GLONASS (Global Navigation Satellite System)) satellite synchronization, such as: GPS(Global Positioning System, global positioning system) synchronous.
Between the second base station, clock synchronization scheme is: based on desirable backhaul Network Synchronization, such as: IEEE(Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers) 1588V2 is synchronous.
Between the third base station, clock synchronization scheme is: air interface synchronization (i.e. Radio-Interface BasedSynchronization Mechanism, wireless internal synchronization mechanism).
But, due at LTE(Long Term Evolution such as indoor, high building focuses, Long Term Evolution) in typical application scenarios, when adopting first kind of way to realize clock synchronous between base station, the reference signal of synchronisation source base station is not easy to obtain, and makes clock synchronous between base station be not easy to realize; When adopting the second way to realize clock synchronous between base station, because the internal clocking of base station realizes synchronous with the master clock of main control computer by hardware and software by IEEE1588, during concrete use, clock synchronous between base station cannot be ensured; Therefore, air interface synchronization becomes the mainstream scheme of clock synchronous between base station.
At present, the air interface synchronization technology of a kind of network intercepting (NW, Network Listening) is proposed in 3GPP.Wherein, the air interface synchronization technology of network intercepting proposes two kinds of implementations:
The first implementation is: based on MBSFN(Multicast/Broadcast Singal FrequencyNetwork, multicast/broadcast single frequency network) the network intercepting scheme of subframe; The second implementation is: based on TDD(Time Division Duplex, time division duplex) the network intercepting scheme of special subframe.
Particularly, based in the network intercepting scheme of MBSFN sub-frame, MBSFN is for sending multicast signals.Because 3GPP specifies that in LTE system, uplink and downlink timeslot ratio configuration mode meets each downstream transmission cycle memory at one for sending the subframe of downlink data, once the network intercepting scheme based on MBSFN sub-frame is applied in LTE system, the subframe that unique one is used for sending downlink data is used for sending multicast signals, make there is no resource for transmitting other public service signals (such as: reference signal) of community, clock synchronous between base station cannot be carried out.
In order to solve in the network intercepting scheme based on MBSFN sub-frame clock synchronous between base station cannot problem, propose the mode of mourning in silence, namely intercept mourn in silence and AF panel mourn in silence, but clock synchronous between base station can only be realized between the base station of 4 adjacent ranks, make synchronous relay ability between synchronising base station poor, and there is the larger problem of system signaling expense.
Based in the network intercepting scheme of TDD special subframe, utilize GP(GuardPeriod in TDD special time slot, protection interval) interval; transfer clock synchronizing signal between the base station of different brackets; but, due to GP limited length, make synchronous relay ability between synchronising base station poor.
Summary of the invention
Embodiments provide a kind of method and apparatus of synchronization among base stations, between the synchronising base station that the method for solving the synchronization among base stations adopted at present exists, synchronous relay ability, causes the inefficient problem of each synchronization among base stations in system.
A method for synchronization among base stations, is applied in long-term advancing time division duplex LTE TDD system, comprises:
Obtaining the synchronous configuration information of synchronisation source base station, wherein, in described synchronous configuration information, containing the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station;
According to the GP information of the described special subframe comprised in described synchronous configuration information, receive the synchronizing signal that described synchronisation source base station sends, and utilize the described synchronizing signal received, keep the clock synchronous between described synchronisation source base station.
The synchronous configuration information of described acquisition synchronisation source base station, comprising:
Receive the synchronization level information of the base station of core net or the transmission of described synchronisation source base station;
According to the corresponding relation between the synchronization level information preset and synchronous configuration information, determine the synchronous configuration information of described synchronisation source base station.
The synchronous configuration information of described acquisition synchronisation source base station, comprising:
Receive the synchronization level information of the base station that core net or described synchronisation source base station send and synchronous configuration information corresponding to synchronization level information.
The GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
The orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies is further comprises in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
According to the GP information of the described special subframe comprised in described synchronous configuration information, receive the synchronizing signal that described synchronisation source base station sends, comprising:
According to cycle information and/or the offset information of the special subframe of the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe receives the synchronizing signal that described synchronisation source base station sends.
Obtain the synchronous configuration information of synchronisation source base station, comprising:
The synchronous configuration information of synchronisation source base station is obtained by the mode of wire transmission or the mode of monitoring of eating dishes without rice or wine.
A method for synchronization among base stations, is applied in long-term advancing time division duplex LTE TDD system, comprises:
Determining synchronous configuration information, wherein, in described synchronous configuration information, containing the protection interval GP information of the special subframe for carrying synchronizing signal;
Utilize the GP information of the special subframe of the carrying synchronizing signal comprised in described synchronous configuration information that synchronizing signal is sent to base station to be synchronized.
Describedly determine synchronous configuration information, comprising:
Obtain the corresponding relation between synchronization level information and synchronous configuration information preset;
According to self synchronization level and described corresponding relation, determine the synchronous configuration information of self.
Describedly determine synchronous configuration information, comprising:
Receive synchronization level information and the corresponding relation between synchronous configuration information of core net transmission;
According to the synchronization level of self, and described corresponding relation, determine the synchronous configuration information of self.
The GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
The orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies is further comprises in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
Synchronizing signal is sent to base station to be synchronized by the described GP information of the special subframe of the carrying synchronizing signal comprised in described synchronous configuration information that utilizes, and comprising:
According to cycle information and/or the offset information of the special subframe of the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe sends synchronizing signal.
An equipment for synchronization among base stations, is applied in long-term advancing time division duplex LTE TDD system, comprises:
Receiver module, for obtaining the synchronous configuration information of synchronisation source base station, wherein, contains the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station in described synchronous configuration information;
Synchronization module, for the GP information according to the described special subframe comprised in described synchronous configuration information, receives the synchronizing signal that described synchronisation source base station sends, and utilizes the described synchronizing signal received, keep the clock synchronous between described synchronisation source base station.
Described receiver module, specifically for receiving the synchronization level information of the base station of core net or the transmission of described synchronisation source base station; According to the corresponding relation between the synchronization level information preset and synchronous configuration information, determine the synchronous configuration information of described synchronisation source base station.
Described receiver module, the synchronous configuration information that synchronization level information and synchronization level information specifically for receiving the base station of core net or the transmission of described synchronisation source base station are corresponding.
The GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
The orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies is further comprises in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
Described synchronization module, specifically for cycle information and/or the offset information of the special subframe according to the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe receives the synchronizing signal that described synchronisation source base station sends.
Described receiver module, specifically for obtaining the synchronous configuration information of synchronisation source base station by the mode of wire transmission or the mode of monitoring of eating dishes without rice or wine.
An equipment for synchronization among base stations, is applied in long-term advancing time division duplex LTE TDD system, comprises:
Determination module, for determining synchronous configuration information, wherein, contains the protection interval GP information of the special subframe for carrying synchronizing signal in described synchronous configuration information;
Sending module, sends to base station to be synchronized for utilizing the GP information of the special subframe for carrying synchronizing signal comprised in described synchronous configuration information by synchronizing signal.
Described determination module, specifically for obtaining the corresponding relation between synchronization level information and synchronous configuration information preset; According to self synchronization level and described corresponding relation, determine the synchronous configuration information of self.
Described determination module, specifically for receiving synchronization level information and the corresponding relation between synchronous configuration information of core net transmission; According to the synchronization level of self, and described corresponding relation, determine the synchronous configuration information of self.
The GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
The orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies is further comprises in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
Described sending module, specifically for cycle information and/or the offset information of the special subframe according to the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe sends synchronizing signal.
Beneficial effect of the present invention is as follows:
The embodiment of the present invention, by obtaining the synchronous configuration information of synchronisation source base station, contains the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station in described synchronous configuration information, according to the GP information of the described special subframe comprised in described synchronous configuration information, receive the synchronizing signal that described synchronisation source base station sends, and utilize the described synchronizing signal received, keep the clock synchronous between described synchronisation source base station, like this, synchronisation source base station utilizes the GP information carrying synchronizing signal of special subframe, and base station to be synchronized utilizes the synchronous configuration information of synchronisation source base station to obtain synchronizing signal, make to realize clock synchronous between the base station of different synchronization level, efficiently avoid the problem of the synchronization among base stations relay ability of different synchronization level, improve the synchronous efficiency between different synchronization level base station.
Accompanying drawing explanation
The schematic flow sheet of the method for a kind of synchronization among base stations that Fig. 1 provides for the embodiment of the present invention one;
The schematic flow sheet of the method for a kind of synchronization among base stations that Fig. 2 provides for the embodiment of the present invention two;
The structural representation of the equipment of a kind of synchronization among base stations that Fig. 3 provides for the embodiment of the present invention three;
The structural representation of the equipment of a kind of synchronization among base stations that Fig. 4 provides for the embodiment of the present invention four.
Embodiment
In order to realize object of the present invention, embodiments provide a kind of method and apparatus of synchronization among base stations, by obtaining the synchronous configuration information of synchronisation source base station, in described synchronous configuration information, contain the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station, according to the GP information of the described special subframe comprised in described synchronous configuration information, receive the synchronizing signal that described synchronisation source base station sends, and utilize the described synchronizing signal received, keep the clock synchronous between described synchronisation source base station, like this, synchronisation source base station utilizes the GP information carrying synchronizing signal of special subframe, and base station to be synchronized utilizes the synchronous configuration information of synchronisation source base station to obtain synchronizing signal, make to realize clock synchronous between the base station of different synchronization level, efficiently avoid the problem of the synchronization among base stations relay ability of different synchronization level, improve the synchronous efficiency between different synchronization level base station.
It should be noted that, embodiments of the present invention are applied in and include but not limited to: in the scene of base station uplink and downlink timeslot ratio configuration mode 0.
Wherein, the scene of described base station uplink and downlink timeslot ratio configuration mode 0 refers to when a uplink and downlink timeslot ratio configured length is 5ms or 10ms, there is a subframe and be used for transmission of downlink signal in every 5ms.
Below in conjunction with Figure of description, each embodiment of the present invention is described in detail.
Embodiment one:
As shown in Figure 1, the schematic flow sheet of the method for a kind of synchronization among base stations provided for the embodiment of the present invention one.Described method can be as described below.
Step 101: the synchronous configuration information obtaining synchronisation source base station.
Wherein, the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station is contained in described synchronous configuration information.
In a step 101, in LTE TDD system, distinguished by time division way because uplink and downlink signals sends, when adopting Transmission Time Interval (TTI, the Transmission Time Interval) of 1ms, the switching cycle of uplink and downlink signals is the shortest is 5ms.
In TD-LTE, physical layer frame structure is: a wireless length of detecing is 10ms, contains two fields, and the length of each field is 5ms, contains 5 subframes in each field, and the length of each subframe is 1ms.
In addition, in TD-LTE frame structure, there is the configuration of multiple time slot ratio, 5ms cycle and 10ms cycle can be divided into, the up-downgoing business of different ratio can be supported so more neatly.
That is, in TD-LTE frame structure in the configuration of up-downgoing sequential, the switching cycle of the downstream-to-upstream of 5ms and 10ms is supported.
Wherein, in the 5ms cycle, subframe 1 and subframe 6 fixed configurations are special subframe; Within the 10ms cycle, subframe 1 fixed configurations is special subframe.
Each special subframe by by DwPTS(namely for transmitting downlink data), GP(protects interval) and UpPTS(namely for transmit ascending data) 3 special time slots form.
As shown in table 1, the allocation list (unit: symbol) for special subframe:
Table 1
As can be seen from Table 1, three special time slots in each special subframe can configure different OFDM symbol, form different time slot configuration ratios, make TDD system can configure concrete up-downgoing resource ratio neatly, support different service types better.
Carrying out like this along with business such as the Internets, according to the size of up-downgoing business transmitted data amount, the time slot ratio of flexible configuration ascending-descending subframes, improves resource utilization effectively.
Based on the inherent characteristic that TDD system possesses; utilize the ability of TDD system flexible configuration up-downgoing resource ratio; network side is each the base station configuration synchronization configuration information in compass of competency; wherein, the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station is contained.
Wherein, the GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal.
Wherein, the cycle information for the special subframe carrying synchronizing signal is more than or equal to up-downgoing switching cycle.
Such as: be 20ms for carrying the cycle information of the special subframe of synchronizing signal, mean that every 20ms occurs that the GP of a special subframe carries the situation of synchronizing signal, be not that GP in the special subframe sent each time carries synchronizing signal, also just describe base station to be synchronized receive synchronisation source base station send reference signal time, every 20ms need to synchronisation source base station send synchronous signal acquisition once.
Wherein, the offset information for the special subframe carrying synchronizing signal refers at one for carrying in the transmission cycle of the special subframe of synchronizing signal, in units of 5ms, carries synchronizing signal by the GP of the special subframe sent at which 5ms.
Such as: be still 20ms for the cycle information of special subframe of carrying synchronizing signal be example, the offset information of the base station special subframe of synchronization level 0 is the 1st 5ms, and so the synchronizing signal of the base station of synchronization level 0 is sent during the 5ms of the 1st within the 20ms cycle by the GP of special subframe; The offset information of the base station special subframe of synchronization level 1 is the 2nd 5ms, and so the synchronizing signal of the base station of synchronization level 1 is sent during the 5ms of the 2nd within the 20ms cycle by the GP of special subframe; The offset information of the base station special subframe of synchronization level 2 is the 3rd 5ms, and so the synchronizing signal of the base station of synchronization level 2 is sent during the 5ms of the 3rd within the 20ms cycle by the GP of special subframe; Etc..
Illustrate when needing, the base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
Now, for the base station of different synchronization level for the different situation of the GP of the special subframe carrying synchronizing signal, the OFDM symbol be actually used in the special subframe of carrying synchronizing signal in GP can be the same or different, and does not limit here.
In another embodiment of the present invention, further comprises the orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies in the GP information of described special subframe.
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
Such as: be still 20ms for the cycle information of special subframe of carrying synchronizing signal be example, the offset information of the base station special subframe of synchronization level 0 is the 1st 5ms, and so the synchronizing signal of the base station of synchronization level 0 is sent during the 5ms of the 1st within the 20ms cycle by the GP of special subframe; The offset information of the base station special subframe of synchronization level 1 is the 1st 5ms, so the synchronizing signal of the base station of synchronization level 1 is sent during the 5ms of the 1st within the 20ms cycle by the GP of special subframe, now, the base station of synchronization level 0 is different for the OFDM symbol information of the GP carrying the described special subframe of synchronizing signal with the base station of synchronization level 1, and namely the base station of synchronization level 0 is m0 OFDM symbol for carrying the OFDM symbol information of the GP of the described special subframe of synchronizing signal; The base station of synchronization level 1 is m1 OFDM symbol for carrying the OFDM symbol information of the GP of the described special subframe of synchronizing signal.
In another embodiment of the present invention, network side is that the mode of each base station configuration synchronization configuration information in compass of competency includes but not limited to:
Corresponding relation between configuration synchronization configuration information and synchronization level.
Like this, network side is by broadcast or the relation between the synchronous configuration information of other mode signals base and synchronization level information, make base station when receiving the relation between synchronous configuration information and synchronization level information, determine the synchronous configuration information corresponding with self synchronization level, and send synchronizing signal according to the synchronous configuration information determined.
It should be noted that, in base station also can be pre-configured corresponding relation between synchronization level information with synchronous configuration relation, do not limit here.
First, the configuration relation of three special time slots in network side determination synchronisation source base station and base station to be synchronized special subframe.
A kind of is that synchronisation source base station is identical with the configuration relation of three special time slots in the special subframe of base station to be synchronized.
Such as: synchronisation source base station and base station to be synchronized be altogether 5 synchronization level (namely 0,1,2,3,4}), synchronisation source base station and base station to be synchronized all adopt in uplink and downlink timeslot configuration mode 0(and 10ms length exists two special subframes), and in each special subframe, DwPTS:GP:UpPTS all meets 6:6:2.
Another kind is that synchronisation source base station is not identical with the configuration relation of three special time slots in the special subframe of base station to be synchronized.
Such as: synchronisation source base station and base station to be synchronized be altogether 5 synchronization level (namely 0,1,2,3,4}), synchronisation source base station and base station to be synchronized all adopt in uplink and downlink timeslot configuration mode 0(and 10ms length exists two special subframes), but, synchronization level 0,1, in each special subframe, DwPTS:GP:UpPTS all meets 6:6:2 in the base station of 2}, synchronization level 3, in each special subframe, DwPTS:GP:UpPTS all meets 3:9:2 in the base station of 4}.
Secondly, network side to the OFDM symbol of GP in special subframe in base station, determines that different brackets base station is for carrying the OFDM symbol of the GP of the special subframe of synchronizing signal according to configuration.
Wherein, the OFDM symbol information for carrying synchronizing signal between the base station of different synchronization level is different.
Or, time-multiplexed mode is adopted between the base station of different synchronization level, for the base station assigns of each synchronization level is for carrying the OFDM symbol of the GP of the special subframe of synchronizing signal, make to meet orthogonality relation for the OFDM symbol of the GP carrying the special subframe of synchronizing signal between the base station of different synchronization level.
Such as: the base station of synchronization level 0 is 1 for carrying the number of the OFDM symbol of synchronizing signal; The base station of synchronization level 1 is 2 for carrying the number of the OFDM symbol of synchronizing signal; The base station of synchronization level 2 is 3 for carrying the number of the OFDM symbol of synchronizing signal; Etc..
Again such as: the base station of synchronization level 0 is m0 OFDM symbol for carrying the OFDM symbol of synchronizing signal; The base station of synchronization level 1 is m1 OFDM symbol for carrying the OFDM symbol of synchronizing signal; The base station of synchronization level 2 is m2 OFDM symbol for carrying the OFDM symbol of synchronizing signal; Etc..
Particularly, the mode obtaining the synchronous configuration information of synchronisation source base station includes but not limited to under type:
First kind of way:
First, the synchronization level information of the base station of core net or the transmission of described synchronisation source base station is received.
Secondly, according to the corresponding relation between the synchronization level information preset and synchronous configuration information, the synchronous configuration information of described synchronisation source base station is determined.
The second way:
Receive the synchronization level information of the base station that core net or described synchronisation source base station send and synchronous configuration information corresponding to synchronization level information.
Particularly, the synchronous configuration information of synchronisation source base station is obtained by the mode of wire transmission or the mode of monitoring of eating dishes without rice or wine.
Step 102: according to the GP information of the described special subframe comprised in described synchronous configuration information, receives the synchronizing signal that described synchronisation source base station sends, and utilizes the described synchronizing signal received, and keeps the clock synchronous between described synchronisation source base station.
In a step 102, further comprises cycle information and/or the offset information of the special subframe of carrying synchronizing signal in described synchronous configuration information.
Particularly, according to cycle information and/or the offset information of the special subframe of the carrying synchronizing signal comprised in the described synchronous configuration information received, the GP of described special subframe receives the synchronizing signal that described synchronisation source base station sends.
Such as: be still 20ms for the cycle information of special subframe of carrying synchronizing signal be example, the offset information of the base station special subframe of synchronization level 0 is the 1st 5ms, so the synchronizing signal of the base station of synchronization level 0 is sent during the 5ms of the 1st within the 20ms cycle by the GP of special subframe, and now base station to be synchronized needs to receive during the 1st 5ms within the 20ms cycle synchronizing signal that described synchronisation source base station sends; The offset information of the base station special subframe of synchronization level 1 is the 2nd 5ms, so the synchronizing signal of the base station of synchronization level 1 is sent during the 5ms of the 2nd within the 20ms cycle by the GP of special subframe, and now base station to be synchronized needs to receive during the 2nd 5ms within the 20ms cycle synchronizing signal that described synchronisation source base station sends; The offset information of the base station special subframe of synchronization level 2 is the 3rd 5ms, so the synchronizing signal of the base station of synchronization level 2 is sent during the 5ms of the 3rd within the 20ms cycle by the GP of special subframe, and now base station to be synchronized needs to receive during the 3rd 5ms within the 20ms cycle synchronizing signal that described synchronisation source base station sends; Etc..
It should be noted that, base station to be synchronized, after the synchronous configuration information receiving the transmission of synchronisation source base station, is gone according to synchronous configuration information the synchronizing signal receiving the transmission of synchronisation source base station, effectively can be improved synchronous efficiency.
It should be noted that, synchronizing signal described in the embodiment of the present invention can be synchronous signal sequence, can also be Legacy reference signal, can also be special synchronous signal, not limit here.
By the scheme of the embodiment of the present invention one, obtaining the synchronous configuration information of synchronisation source base station, in described synchronous configuration information, containing the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station, according to the GP information of the described special subframe comprised in described synchronous configuration information, receive the synchronizing signal that described synchronisation source base station sends, and utilize the described synchronizing signal received, keep the clock synchronous between described synchronisation source base station, like this, synchronisation source base station utilizes the GP information carrying synchronizing signal of special subframe, and base station to be synchronized utilizes the synchronous configuration information of synchronisation source base station to obtain synchronizing signal, make to realize clock synchronous between the base station of different synchronization level, efficiently avoid the problem of the synchronization among base stations relay ability of different synchronization level, improve the synchronous efficiency between different synchronization level base station.
Embodiment two:
As shown in Figure 2, the schematic flow sheet of the method for a kind of synchronization among base stations provided for the embodiment of the present invention two.The embodiment of the present invention two is and the invention of the embodiment of the present invention one under same inventive concept, and be applied in long-term advancing time division duplex LTE TDD system, described method can be as described below.
Step 201: synchronous configuration information is determined in synchronisation source base station.
Wherein, the protection interval GP information of the special subframe for carrying synchronizing signal is contained in described synchronous configuration information.
In step 201, determine that the mode of synchronous configuration information includes but not limited to under type:
First kind of way:
First, the corresponding relation between the synchronization level information preset and synchronous configuration information is obtained.
Secondly, according to self synchronization level and described corresponding relation, the synchronous configuration information of self is determined.
The second way:
First, synchronization level information and the corresponding relation between synchronous configuration information of core net transmission is received.
Secondly, according to the synchronization level of self, and described corresponding relation, determine the synchronous configuration information of self.
Wherein, the GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
The orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies is further comprises in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
Step 202: utilize the GP information of the special subframe for carrying synchronizing signal comprised in described synchronous configuration information that synchronizing signal is sent to base station to be synchronized.
In step 202., synchronizing signal is sent to base station to be synchronized by the described GP information of the special subframe for carrying synchronizing signal comprised in described synchronous configuration information that utilizes, and comprising:
According to cycle information and/or the offset information of the special subframe of the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe sends synchronizing signal.
By the scheme of the embodiment of the present invention two, synchronous configuration information is sent to base station to be synchronized by synchronisation source base station, the synchronous configuration information making base station to be synchronized utilize synchronisation source base station to send obtains synchronizing signal, clock synchronous between the base station achieving different synchronization level, efficiently avoid the problem of the synchronization among base stations relay ability of different synchronization level, improve the synchronous efficiency between different synchronization level base station.
Embodiment three:
As shown in Figure 3, the structural representation of the equipment of a kind of synchronization among base stations provided for the embodiment of the present invention three, the embodiment of the present invention three is the inventions under same inventive concept with the embodiment of the present invention one and the embodiment of the present invention two, be applied in long-term advancing time division duplex LTE TDD system, described equipment comprises: receiver module 11 and synchronization module 12, wherein:
Receiver module 11, for obtaining the synchronous configuration information of synchronisation source base station, wherein, contains the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station in described synchronous configuration information;
Synchronization module 12, for the GP information according to the described special subframe comprised in described synchronous configuration information, receive the synchronizing signal that described synchronisation source base station sends, and utilize the described synchronizing signal received, keep the clock synchronous between described synchronisation source base station.
In another embodiment of the present invention, described receiver module 11, specifically for receiving the synchronization level information of the base station of core net or the transmission of described synchronisation source base station; According to the corresponding relation between the synchronization level information preset and synchronous configuration information, determine the synchronous configuration information of described synchronisation source base station.
In another embodiment of the present invention, described receiver module 11, the synchronous configuration information that synchronization level information and synchronization level information specifically for receiving the base station of core net or the transmission of described synchronisation source base station are corresponding.
In another embodiment of the present invention, the GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
The orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies is further comprises in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
Described synchronization module 12, specifically for cycle information and/or the offset information of the special subframe according to the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe receives the synchronizing signal that described synchronisation source base station sends.
Described receiver module 11, specifically for obtaining the synchronous configuration information of synchronisation source base station by the mode of wire transmission or the mode of monitoring of eating dishes without rice or wine.
It should be noted that, the equipment described in the embodiment of the present invention three can be the function of the embodiment of the present invention one and the synchronisation source base station described in the embodiment of the present invention two, can be realized by hardware mode, also can be realized by software mode, not limit here.
Embodiment four:
As shown in Figure 4, the structural representation of the equipment of a kind of synchronization among base stations provided for the embodiment of the present invention four, the embodiment of the present invention four is and the invention of the embodiment of the present invention one to the embodiment of the present invention three under same inventive concept, be applied in long-term advancing time division duplex LTE TDD system, described equipment comprises: determination module 21 and sending module 22, wherein:
Determination module 21, for determining synchronous configuration information, wherein, contains the protection interval GP information of the special subframe for carrying synchronizing signal in described synchronous configuration information;
Sending module 22, sends to base station to be synchronized for utilizing the GP information of the special subframe for carrying synchronizing signal comprised in described synchronous configuration information by synchronizing signal.
Described determination module 21, specifically for obtaining the corresponding relation between synchronization level information and synchronous configuration information preset; According to self synchronization level and described corresponding relation, determine the synchronous configuration information of self.
Described determination module 21, specifically for receiving synchronization level information and the corresponding relation between synchronous configuration information of core net transmission; According to the synchronization level of self, and described corresponding relation, determine the synchronous configuration information of self.
The GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
The orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies is further comprises in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
Described sending module 22, specifically for cycle information and/or the offset information of the special subframe according to the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe sends synchronizing signal.
It should be noted that, the equipment described in the embodiment of the present invention four can be the function of the embodiment of the present invention one and the base station to be synchronized described in the embodiment of the present invention two, can be realized by hardware mode, also can be realized by software mode, not limit here.
In addition, the embodiment of the present invention three and the module described in the embodiment of the present invention four can also appear in a base station, a base station both as the synchronisation source base station of next stage base station, can become again the base station to be synchronized of upper level base station, not limit here in actual applications.
It will be understood by those skilled in the art that embodiments of the invention can be provided as method, device (equipment) or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, device (equipment) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (26)
1. a method for synchronization among base stations, is characterized in that, is applied in long-term advancing time division duplex LTE TDD system, comprises:
Obtaining the synchronous configuration information of synchronisation source base station, wherein, in described synchronous configuration information, containing the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station;
According to the GP information of the described special subframe comprised in described synchronous configuration information, receive the synchronizing signal that described synchronisation source base station sends, and utilize the described synchronizing signal received, keep the clock synchronous between described synchronisation source base station.
2. the method for claim 1, is characterized in that, the synchronous configuration information of described acquisition synchronisation source base station, comprising:
Receive the synchronization level information of the base station of core net or the transmission of described synchronisation source base station;
According to the corresponding relation between the synchronization level information preset and synchronous configuration information, determine the synchronous configuration information of described synchronisation source base station.
3. the method for claim 1, is characterized in that, the synchronous configuration information of described acquisition synchronisation source base station, comprising:
Receive the synchronization level information of the base station that core net or described synchronisation source base station send and synchronous configuration information corresponding to synchronization level information.
4. the method as described in as arbitrary in claims 1 to 3, it is characterized in that, the GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
5. method as claimed in claim 4, is characterized in that, further comprises the orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
6. method as claimed in claim 4, is characterized in that, according to the GP information of the described special subframe comprised in described synchronous configuration information, receives the synchronizing signal that described synchronisation source base station sends, comprising:
According to cycle information and/or the offset information of the special subframe of the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe receives the synchronizing signal that described synchronisation source base station sends.
7. the method as described in claim 1 or 6, is characterized in that, obtains the synchronous configuration information of synchronisation source base station, comprising:
The synchronous configuration information of synchronisation source base station is obtained by the mode of wire transmission or the mode of monitoring of eating dishes without rice or wine.
8. a method for synchronization among base stations, is characterized in that, is applied in long-term advancing time division duplex LTE TDD system, comprises:
Determining synchronous configuration information, wherein, in described synchronous configuration information, containing the protection interval GP information of the special subframe for carrying synchronizing signal;
Utilize the GP information of the special subframe of the carrying synchronizing signal comprised in described synchronous configuration information that synchronizing signal is sent to base station to be synchronized.
9. method as claimed in claim 8, is characterized in that, describedly determines synchronous configuration information, comprising:
Obtain the corresponding relation between synchronization level information and synchronous configuration information preset;
According to self synchronization level and described corresponding relation, determine the synchronous configuration information of self.
10. method as claimed in claim 8, is characterized in that, describedly determines synchronous configuration information, comprising:
Receive synchronization level information and the corresponding relation between synchronous configuration information of core net transmission;
According to the synchronization level of self, and described corresponding relation, determine the synchronous configuration information of self.
11. as arbitrary in claim 8 ~ 10 as described in method, it is characterized in that, the GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
12. methods as claimed in claim 11, is characterized in that, further comprises the orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
13. methods as claimed in claim 12, is characterized in that, synchronizing signal is sent to base station to be synchronized by the described GP information of the special subframe of the carrying synchronizing signal comprised in described synchronous configuration information that utilizes, and comprising:
According to cycle information and/or the offset information of the special subframe of the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe sends synchronizing signal.
The equipment of 14. 1 kinds of synchronization among base stations, is characterized in that, is applied in long-term advancing time division duplex LTE TDD system, comprises:
Receiver module, for obtaining the synchronous configuration information of synchronisation source base station, wherein, contains the protection interval GP information of the special subframe of the synchronizing signal for carrying described synchronisation source base station in described synchronous configuration information;
Synchronization module, for the GP information according to the described special subframe comprised in described synchronous configuration information, receives the synchronizing signal that described synchronisation source base station sends, and utilizes the described synchronizing signal received, keep the clock synchronous between described synchronisation source base station.
15. equipment as claimed in claim 14, is characterized in that,
Described receiver module, specifically for receiving the synchronization level information of the base station of core net or the transmission of described synchronisation source base station; According to the corresponding relation between the synchronization level information preset and synchronous configuration information, determine the synchronous configuration information of described synchronisation source base station.
16. equipment as claimed in claim 14, is characterized in that, described receiver module, the synchronous configuration information that synchronization level information and synchronization level information specifically for receiving the base station of core net or the transmission of described synchronisation source base station are corresponding.
17. as arbitrary in claim 14 ~ 16 as described in equipment, it is characterized in that, the GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
18. equipment as claimed in claim 17, is characterized in that, further comprises the orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
19. equipment as claimed in claim 17, it is characterized in that, described synchronization module, specifically for cycle information and/or the offset information of the special subframe according to the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe receives the synchronizing signal that described synchronisation source base station sends.
20. equipment as described in claim 14 or 19, is characterized in that,
Described receiver module, specifically for obtaining the synchronous configuration information of synchronisation source base station by the mode of wire transmission or the mode of monitoring of eating dishes without rice or wine.
The equipment of 21. 1 kinds of synchronization among base stations, is characterized in that, is applied in long-term advancing time division duplex LTE TDD system, comprises:
Determination module, for determining synchronous configuration information, wherein, contains the protection interval GP information of the special subframe for carrying synchronizing signal in described synchronous configuration information;
Sending module, sends to base station to be synchronized for utilizing the GP information of the special subframe for carrying synchronizing signal comprised in described synchronous configuration information by synchronizing signal.
22. equipment as claimed in claim 21, is characterized in that,
Described determination module, specifically for obtaining the corresponding relation between synchronization level information and synchronous configuration information preset; According to self synchronization level and described corresponding relation, determine the synchronous configuration information of self.
23. equipment as claimed in claim 21, is characterized in that,
Described determination module, specifically for receiving synchronization level information and the corresponding relation between synchronous configuration information of core net transmission; According to the synchronization level of self, and described corresponding relation, determine the synchronous configuration information of self.
24. as arbitrary in claim 21 ~ 23 as described in equipment, it is characterized in that, the GP packets of information of described special subframe contains cycle information and/or the offset information of the special subframe for carrying synchronizing signal;
The base station of different synchronization level is different for the GP carrying the special subframe of synchronizing signal, and wherein, different GP determines according to the cycle information of special subframe and/or offset information.
25. equipment as claimed in claim 24, is characterized in that, further comprises the orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal for carrying described synchronisation source base station takies in the GP information of described special subframe;
The base station of different synchronization level is identical and the base station of different synchronization level is different for the OFDM symbol information carrying the GP of the described special subframe of synchronizing signal for the GP of the special subframe carrying synchronizing signal, wherein, identical GP determines according to the cycle information of special subframe and/or offset information.
26. equipment as claimed in claim 25, it is characterized in that, described sending module, specifically for cycle information and/or the offset information of the special subframe according to the carrying synchronizing signal comprised in the described synchronous configuration information obtained, the GP of described special subframe sends synchronizing signal.
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