CN104812049B - A kind of method and apparatus of synchronization among base stations - Google Patents
A kind of method and apparatus of synchronization among base stations Download PDFInfo
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- CN104812049B CN104812049B CN201410035839.9A CN201410035839A CN104812049B CN 104812049 B CN104812049 B CN 104812049B CN 201410035839 A CN201410035839 A CN 201410035839A CN 104812049 B CN104812049 B CN 104812049B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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Abstract
The invention discloses a kind of method and apparatus of synchronization among base stations, content includes：The synchronization configuration information of synchronous source base station is obtained, the protection interval GP information of the special subframe of the synchronizing signal for carrying the synchronous source base station is contained in the synchronous configuration information；According to the GP information for the special subframe for including in the synchronous configuration information, receive the synchronizing signal that the synchronous source base station is sent, and utilize the synchronizing signal received, it keeps synchronizing with the clock between the synchronous source base station, in this way, synchronous source base station carries synchronizing signal using the GP information of special subframe, and base station to be synchronized obtains synchronizing signal using the synchronization configuration information of synchronous source base station, so that realizing that clock synchronizes between the base station of different synchronization levels, the problem of efficiently avoiding the synchronization among base stations relay energy force difference of different synchronization levels, improve the synchronous efficiency between different synchronization level base stations.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to one kind being based on LTE TDD（Long Term
Evolution Time Division Duplex, long-term advancing time division duplex）Synchronous method and apparatus between system base-station.
Background technology
In order to inhibit the signal interference between base station, with the TDD of frequency deployment（Time Division Duplex, time division duplex）
Base station needs clock between carrying out base station to synchronize.In 3GPP（3rd Generation Partnership Project, the third generation move
Dynamic communication standardization tissue）In define clock synchronization scheme between 3 kinds of base stations：
Clock synchronization scheme is between the first base station：Based on GNSS（Global Navigation Satellite
System, Global Navigation Satellite System）Satellite synchronization, such as：GPS（Global Positioning System, global location
System）It is synchronous.
Clock synchronization scheme is between second of base station：Based on ideal backhaul Network Synchronizations, such as：IEEE
（Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers）
1588V2 is synchronized.
Clock synchronization scheme is between the third base station：Air interface synchronization（That is Radio-Interface Based
Synchronization Mechanism, wireless internal synchronization mechanism）.
But due to indoors, the LTE such as high building hot spot（Long Term Evolution, long term evolution）Typical application
In scene, using when clock synchronizes between first way realization base station, the reference signal of synchronous source base station is not easy to obtain so that
Clock, which synchronizes, between base station is not easily accomplished；Using the second way realize base station between clock synchronize when, since IEEE1588 is logical
It crosses hardware and software the internal clocking of base station is synchronous with the realization of the master clock of main controller, can not ensure when specifically used between base station
Clock synchronizes；Therefore, air interface synchronization becomes the mainstream scheme of clock synchronization between base station.
Currently, proposing a kind of network intercepting in 3GPP（NW, Network Listening）Air interface synchronization technology.Wherein,
The air interface synchronization technology of network intercepting proposes two kinds of realization methods：
The first is achieved in that：Based on MBSFN（Multicast/Broadcast Singal Frequency
Network, multicast/broadcast single frequency network）The network intercepting scheme of subframe；It is achieved in that for second：Based on TDD（Time
Division Duplex, time division duplex）The network intercepting scheme of special subframe.
Specifically, in the network intercepting scheme based on MBSFN sub-frame, MBSFN is for sending multicast signals.Due to 3GPP
Uplink and downlink timeslot ratio configuration mode meets each downstream transmission cycle memory at one under transmission in regulation LTE system
Only one is used for by the subframe of row data once applying the network intercepting scheme based on MBSFN sub-frame in LTE system
The subframe of downlink data is sent for sending multicast signals so that no resource is used for transmission other public service signals of cell
（Such as：Reference signal）So that clock, which synchronizes, between base station to carry out.
It can not in order to solve the problems, such as in the network intercepting scheme based on MBSFN sub-frame between base station that clock synchronizes, it is proposed that
Silent mode, that is, it is silent to intercept silent and AF panel, but when between can only realizing base station between the base station of 4 adjacent ranks
Clock synchronizes so that synchronous relay ability is poor between synchronous base station, and there is a problem of that system signaling expense is bigger.
In the network intercepting scheme based on TDD special subframes, GP in TDD special time slots is utilized（Guard Period are protected
Shield interval）Clock sync signal is transmitted in section between different grades of base station, still, due to GP limited lengths so that synchronous
Synchronous relay ability is poor between base station.
Invention content
An embodiment of the present invention provides a kind of method and apparatus of synchronization among base stations, between the base station for solving to use at present
Synchronous synchronization among base stations relay energy force difference existing for synchronous method, leads in system that each synchronization among base stations efficiency is low to ask
Topic.
A kind of method of synchronization among base stations is applied in long-term advancing time division duplex LTE TDD systems, including：
Obtain the synchronization configuration information of synchronous source base station, wherein contained in the synchronous configuration information for carrying
State the protection interval GP information of the special subframe of the synchronizing signal of synchronous source base station；
According to the GP information for the special subframe for including in the synchronous configuration information, the synchronous source base station hair is received
The synchronizing signal sent, and using the synchronizing signal received, keep synchronizing with the clock between the synchronous source base station.
The synchronization configuration information for obtaining synchronous source base station, including：
Receive the synchronization level information of the base station of core net or the synchronous source base station transmission；
According to the correspondence between preset synchronization level information and synchronous configuration information, the synchronisation source is determined
The synchronization configuration information of base station.
The synchronization configuration information for obtaining synchronous source base station, including：
The synchronization level information and synchronization level information for receiving the base station of core net or the synchronous source base station transmission correspond to
Synchronization configuration information.
The GP information of the special subframe contain the special subframe for carrying synchronizing signal cycle information and/or partially
Shifting amount information；
The GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different, wherein different GP are
It is determined according to the cycle information of special subframe and/or offset information.
Further comprise what the synchronizing signal for carrying the synchronous source base station occupied in the GP information of the special subframe
Orthogonal frequency division multiplex OFDM symbolic information；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and different synchronization levels
The OFDM symbol information that base station is used to carry the GP of the special subframe of synchronizing signal is different, wherein identical GP is basis
What the cycle information and/or offset information of special subframe determined.
According to the GP information for the special subframe for including in the synchronous configuration information, the synchronous source base station hair is received
The synchronizing signal sent, including：
According to the carrying synchronizing signal for including in the synchronous configuration information of acquisition special subframe cycle information and/
Or offset information, the synchronizing signal that the synchronous source base station is sent is received on the GP of the special subframe.
The synchronization configuration information of synchronous source base station is obtained, including：
By way of wire transmission or the mode eating dishes without rice or wine to monitor obtains the synchronization configuration information of synchronous source base station.
A kind of method of synchronization among base stations is applied in long-term advancing time division duplex LTE TDD systems, including：
Determine synchronous configuration information, wherein contained in the synchronous configuration information for carrying the special of synchronizing signal
The protection interval GP information of subframe；
Using the carrying synchronizing signal for including in the synchronous configuration information special subframe GP information by synchronizing signal
It is sent to base station to be synchronized.
The determining synchronous configuration information, including：
Obtain the correspondence between preset synchronization level information and synchronous configuration information；
According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
The determining synchronous configuration information, including：
Receive the correspondence between the synchronization level information and synchronous configuration information that core net is sent；
According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
The GP information of the special subframe contain the special subframe for carrying synchronizing signal cycle information and/or partially
Shifting amount information；
The GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different, wherein different GP are
It is determined according to the cycle information of special subframe and/or offset information.
Further comprise what the synchronizing signal for carrying the synchronous source base station occupied in the GP information of the special subframe
Orthogonal frequency division multiplex OFDM symbolic information；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and different synchronization levels
The OFDM symbol information that base station is used to carry the GP of the special subframe of synchronizing signal is different, wherein identical GP is basis
What the cycle information and/or offset information of special subframe determined.
The GP information of the special subframe using the carrying synchronizing signal for including in the synchronous configuration information will synchronize
Signal is sent to base station to be synchronized, including：
According to the carrying synchronizing signal for including in the synchronous configuration information of acquisition special subframe cycle information and/
Or offset information, send synchronizing signal on the GP of the special subframe.
A kind of equipment of synchronization among base stations is applied in long-term advancing time division duplex LTE TDD systems, including：
Receiving module, the synchronization configuration information for obtaining synchronous source base station, wherein include in the synchronous configuration information
The protection interval GP information of the special subframe of synchronizing signal for carrying the synchronous source base station；
Synchronization module receives institute for the GP information according to the special subframe for including in the synchronous configuration information
State the synchronizing signal that synchronous source base station is sent, and using the synchronizing signal received, keep and the synchronous source base station it
Between clock synchronize.
The receiving module is specifically used for receiving the synchronization level letter of the base station of core net or the synchronous source base station transmission
Breath；According to the correspondence between preset synchronization level information and synchronous configuration information, the synchronous source base station is determined
Synchronization configuration information.
The receiving module is specifically used for receiving the synchronization level letter of the base station of core net or the synchronous source base station transmission
Breath synchronous configuration information corresponding with synchronization level information.
The GP information of the special subframe contain the special subframe for carrying synchronizing signal cycle information and/or partially
Shifting amount information；
The GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different, wherein different GP are
It is determined according to the cycle information of special subframe and/or offset information.
Further comprise what the synchronizing signal for carrying the synchronous source base station occupied in the GP information of the special subframe
Orthogonal frequency division multiplex OFDM symbolic information；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and different synchronization levels
The OFDM symbol information that base station is used to carry the GP of the special subframe of synchronizing signal is different, wherein identical GP is basis
What the cycle information and/or offset information of special subframe determined.
The synchronization module, specifically for the carrying synchronizing signal for including in the synchronous configuration information according to acquisition
The cycle information and/or offset information of special subframe receive the synchronous source base station on the GP of the special subframe and send
Synchronizing signal.
The receiving module, specifically for by way of wire transmission or eat dishes without rice or wine monitor mode obtain synchronisation source base
The synchronization configuration information stood.
A kind of equipment of synchronization among base stations is applied in long-term advancing time division duplex LTE TDD systems, including：
Determining module, for determining synchronous configuration information, wherein contained in the synchronous configuration information same for carrying
Walk the protection interval GP information of the special subframe of signal；
Sending module, for utilizing the special subframe for carrying synchronizing signal for including in the synchronous configuration information
Synchronizing signal is sent to base station to be synchronized by GP information.
The determining module is specifically used for obtaining pair between preset synchronization level information and synchronous configuration information
It should be related to；According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
The determining module is specifically used for receiving between the synchronization level information that core net is sent and synchronous configuration information
Correspondence；According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
The GP information of the special subframe contain the special subframe for carrying synchronizing signal cycle information and/or partially
Shifting amount information；
The GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different, wherein different GP are
It is determined according to the cycle information of special subframe and/or offset information.
Further comprise what the synchronizing signal for carrying the synchronous source base station occupied in the GP information of the special subframe
Orthogonal frequency division multiplex OFDM symbolic information；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and different synchronization levels
The OFDM symbol information that base station is used to carry the GP of the special subframe of synchronizing signal is different, wherein identical GP is basis
What the cycle information and/or offset information of special subframe determined.
The sending module, specifically for the carrying synchronizing signal for including in the synchronous configuration information according to acquisition
The cycle information and/or offset information of special subframe, synchronizing signal is sent on the GP of the special subframe.
The present invention has the beneficial effect that：
The embodiment of the present invention synchronizes the synchronization configuration information of source base station by acquisition, is contained in the synchronous configuration information
The protection interval GP information of the special subframe of synchronizing signal for carrying the synchronous source base station；Match confidence according to the synchronization
The GP information for the special subframe for including in breath receives the synchronizing signal that the synchronous source base station is sent, and utilizes and receive
The synchronizing signal, keep and clock between the synchronous source base station synchronize, in this way, synchronous source base station utilizes special subframe
GP information carry synchronizing signal, and base station to be synchronized obtains synchronizing signal using the synchronization configuration information of synchronous source base station, makes
Realization clock synchronizes between obtaining the base station of different synchronization levels, efficiently avoids the synchronization among base stations relay of different synchronization levels
The problem of energy force difference, improve the synchronous efficiency between different synchronization level base stations.
Description of the drawings
Fig. 1 is a kind of flow diagram of the method for synchronization among base stations that the embodiment of the present invention one provides；
Fig. 2 is a kind of flow diagram of the method for synchronization among base stations provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of structural schematic diagram of the equipment for synchronization among base stations that the embodiment of the present invention three provides；
Fig. 4 is a kind of structural schematic diagram of the equipment for synchronization among base stations that the embodiment of the present invention four provides.
Specific implementation mode
In order to achieve the object of the present invention, an embodiment of the present invention provides a kind of methods and apparatus of synchronization among base stations, lead to
The synchronization configuration information for obtaining synchronous source base station is crossed, is contained in the synchronous configuration information for carrying the synchronous source base station
Synchronizing signal special subframe protection interval GP information；According to the special subframe for including in the synchronous configuration information
GP information, receive the synchronizing signal that the synchronous source base station is sent, and using the synchronizing signal received, keep and institute
The clock stated between synchronous source base station synchronizes, in this way, synchronous source base station carries synchronizing signal using the GP information of special subframe, and
Base station to be synchronized obtains synchronizing signal using the synchronization configuration information of synchronous source base station so that between the base station of different synchronization levels
The problem of realizing that clock synchronizes, efficiently avoiding the synchronization among base stations relay energy force difference of different synchronization levels, improves difference
Synchronous efficiency between synchronization level base station.
It should be noted that embodiments of the present invention are applied including but not limited to：Base station uplink and downlink timeslot ratio is matched
In the scene for setting pattern 0.
Wherein, the scene of the base station uplink and downlink timeslot ratio configuration mode 0 refers to matching in a uplink and downlink timeslot ratio
When to set length be 5ms 10ms, per in 5ms, there are a subframes to be used for transmission downlink signal.
The each embodiment of the present invention is described in detail with reference to the accompanying drawings of the specification.
Embodiment one：
As shown in Figure 1, being a kind of flow diagram of the method for synchronization among base stations that the embodiment of the present invention one provides.It is described
Method can be as described below.
Step 101：Obtain the synchronization configuration information of synchronous source base station.
Wherein, the special son of the synchronizing signal for carrying the synchronous source base station is contained in the synchronous configuration information
The protection interval GP information of frame.
In a step 101, it in LTE TDD systems, is distinguished by time division way since uplink and downlink signals are sent,
Using the Transmission Time Interval of 1ms（TTI, Transmission Time Interval）When, the switching cycle of uplink and downlink signals
Most short is 5ms.
Physical layer frame structure is in TD-LTE：One wireless length of detecing is 10ms, contains two fields, each half
The length of frame is 5ms, 5 subframes is contained in each field, the length of each subframe is 1ms.
In addition, can be divided into 5ms periods and 10ms periods there are the configuration of a variety of time slot ratios in TD-LTE frame structures,
The uplink and downlink business of different ratio can be more neatly supported in this way.
That is, supporting the downstream-to-upstream of 5ms and 10ms in the configuration of uplink and downlink sequential in TD-LTE frame structures
Switching cycle.
Wherein, in the 5ms periods, subframe 1 and 6 fixed configurations of subframe are special subframe；Within the 10ms periods, subframe 1 is solid
Surely it is configured to special subframe.
Each special subframe is by by DwPTS（It is used for transmission downlink data）、GP（Protection interval）And UpPTS（Use
In transmission upstream data）3 special time slot compositions.
As shown in table 1, it is the allocation list of special subframe（Unit：Symbol）：
Table 1
From table 1 it follows that three special time slots in each special subframe can configure different OFDM symbols,
Form different time slot configuration ratios so that TDD system can be configured flexibly specific uplink and downlink resource ratio, more preferable twelve Earthly Branches
Hold different service types.
In this way with the development of the business such as internet, according to the size of uplink and downlink business transmitted data amount, in flexible configuration
The time slot ratio of downlink subframe, is effectively improved resource utilization.
Based on the inherent characteristic that TDD system has, the ability of TDD system flexible configuration uplink and downlink resource ratio, net are utilized
Network side is the synchronous configuration information of each base station configuration in compass of competency comprising for carrying the synchronisation source base
The protection interval GP information of the special subframe for the synchronizing signal stood.
Wherein, the GP information of the special subframe contains the cycle information of the special subframe for carrying synchronizing signal
And/or offset information.
Wherein, the cycle information of the special subframe for carrying synchronizing signal is more than or equal to uplink and downlink switching cycle.
Such as：The cycle information of special subframe for carrying synchronizing signal is 20ms, it is meant that is occurred per 20ms primary
The case where GP carrying synchronizing signals of special subframe is not that the GP in the special subframe sent each time carries synchronous letter
Number, also just illustrate that base station to be synchronized when receiving the reference signal that synchronous source base station is sent, is needed per 20ms to synchronisation source base
The synchronous signal acquisition sent of standing is primary.
Wherein, the offset information of the special subframe for carrying synchronizing signal refers at one for carrying synchronizing signal
Special subframe sending cycle in, as unit of 5ms, will in the GP for the special subframe which 5ms is sent carry synchronize
Signal.
Such as：For cycle information still for carrying the special subframe of synchronizing signal is 20ms, the base of synchronization level 0
Stand special subframe offset information be the 1st 5ms, then the synchronizing signal of the base station of synchronization level 0 will be within the 20ms periods
The 1st 5ms when sent by the GP of special subframe；The offset information of the base station special subframe of synchronization level 1 is the 2nd
5ms, then the synchronizing signal of the base station of synchronization level 1 will be sent out when the 2nd 5ms within the 20ms periods by the GP of special subframe
It send；The offset information of the base station special subframe of synchronization level 2 is the 3rd 5ms, then the synchronous letter of the base station of synchronization level 2
It number will be sent by the GP of special subframe when the 3rd 5ms within the 20ms periods；……；Etc..
Illustrating when needing, the GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different,
Wherein, different GP is determined according to the cycle information and/or offset information of special subframe.
At this point, in the case of the GP of the special subframe for the base station of different synchronization levels for carrying synchronizing signal is different,
It is actually used in the OFDM symbol in the special subframe of carrying synchronizing signal in GP can be the same or different, not limit here
It is fixed.
In another embodiment of the present invention, it is further comprised in the GP information of the special subframe described same for carrying
Walk the orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal of source base station occupies.
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and different synchronization levels
The OFDM symbol information that base station is used to carry the GP of the special subframe of synchronizing signal is different, wherein identical GP is basis
What the cycle information and/or offset information of special subframe determined.
Such as：For cycle information still for carrying the special subframe of synchronizing signal is 20ms, the base of synchronization level 0
Stand special subframe offset information be the 1st 5ms, then the synchronizing signal of the base station of synchronization level 0 will be within the 20ms periods
The 1st 5ms when sent by the GP of special subframe；The offset information of the base station special subframe of synchronization level 1 is the 1st
5ms, then the synchronizing signal of the base station of synchronization level 1 will be sent out when the 1st 5ms within the 20ms periods by the GP of special subframe
It send, at this point, the base station of synchronization level 0 and the base station of synchronization level 1 are used to carry the GP's of the special subframe of synchronizing signal
OFDM symbol information is different, i.e., the base station of synchronization level 0 is used to carry the OFDM symbols of the GP of the special subframe of synchronizing signal
Number information is the m0 OFDM symbol；The base station of synchronization level 1 is used to carry the GP's of the special subframe of synchronizing signal
OFDM symbol information is the m1 OFDM symbol.
In another embodiment of the present invention, network side is that each base station configuration in compass of competency is synchronous with confidence
The mode of breath includes but not limited to：
Correspondence between the synchronous configuration information of configuration and synchronization level.
In this way, network side is synchronized by broadcast or other modes signals base between configuration information and synchronization level information
Relationship so that base station when receiving the relationship between synchronous configuration information and synchronization level information, determination it is synchronous with itself
The corresponding synchronous configuration information of grade, and send synchronizing signal according to determining synchronization configuration information.
It should be noted that pair between synchronization level information and synchronous configuration relation can also be pre-configured in base station
It should be related to, not limit here.
First, network side determines that synchronous source base station and the configuration of three special time slots in base station special subframe to be synchronized close
System.
One is synchronous source base station is identical as the configuration relation of three special time slots in the special subframe of base station to be synchronized.
Such as：Synchronous source base station and base station to be synchronized are 5 synchronization levels altogether（That is { 0,1,2,3,4 }）, synchronous source base station
It is all made of uplink and downlink timeslot configuration mode 0 with base station to be synchronized（I.e. there are two special subframes in 10ms length）, and each
DwPTS in special subframe：GP：UpPTS is satisfied by 6:6:2.
Another kind is synchronous source base station and the configuration relation of three special time slots in the special subframe of base station to be synchronized not phase
Together.
Such as：Synchronous source base station and base station to be synchronized are 5 synchronization levels altogether（That is { 0,1,2,3,4 }）, synchronous source base station
It is all made of uplink and downlink timeslot configuration mode 0 with base station to be synchronized（I.e. there are two special subframes in 10ms length）, still, synchronous
DwPTS in each special subframe in the base station of grade { 0,1,2 }：GP：UpPTS is satisfied by 6:6:2, synchronization level { 3,4 }
DwPTS in each special subframe in base station：GP：UpPTS is satisfied by 3:9:2.
Secondly, network side determines that different brackets base station is used according to the OFDM symbol for being allocated in base station GP in special subframe
In the OFDM symbol of the GP of the special subframe of carrying synchronizing signal.
Wherein, different for carrying the OFDM symbol information of synchronizing signal between the base station of different synchronization levels.
It is the base station point of each synchronization level alternatively, using time-multiplexed mode between the base station of different synchronization levels
It is used in the OFDM symbol of the GP of the special subframe of carrying synchronizing signal so that same for carrying between the base station of different synchronization levels
The OFDM symbol for walking the GP of the special subframe of signal meets orthogonality relation.
Such as：The number that the base station of synchronization level 0 is used to carry the OFDM symbol of synchronizing signal is 1；Synchronization level 1
The number that base station is used to carry the OFDM symbol of synchronizing signal is 2；The base station of synchronization level 2 is for carrying synchronizing signal
The number of OFDM symbol is 3；……；Etc..
In another example：The OFDM symbol that the base station of synchronization level 0 is used to carry synchronizing signal is the m0 OFDM symbol；It is synchronous
The OFDM symbol that the base station of grade 1 is used to carry synchronizing signal is the m1 OFDM symbol；The base station of synchronization level 2 is for carrying
The OFDM symbol of synchronizing signal is the m2 OFDM symbol；……；Etc..
Specifically, the mode for obtaining the synchronization configuration information of synchronous source base station includes but not limited to following manner：
First way：
First, the synchronization level information of the base station of core net or the synchronous source base station transmission is received.
Next, according to preset synchronization level information and synchronizes the correspondence between configuration information, described in determination
The synchronization configuration information of synchronous source base station.
The second way：
The synchronization level information and synchronization level information for receiving the base station of core net or the synchronous source base station transmission correspond to
Synchronization configuration information.
Specifically, by way of wire transmission or eat dishes without rice or wine monitor mode obtain synchronous source base station synchronization match confidence
Breath.
Step 102：According to the GP information for the special subframe for including in the synchronous configuration information, the synchronization is received
The synchronizing signal that source base station is sent, and using the synchronizing signal that receives, keep between the synchronous source base station when
Clock synchronizes.
In a step 102, the period letter of the special subframe of carrying synchronizing signal is further comprised in the synchronous configuration information
Breath and/or offset information.
Specifically, according to the week of the special subframe for the carrying synchronizing signal for including in the synchronous configuration information received
Phase information and/or offset information receive the synchronizing signal that the synchronous source base station is sent on the GP of the special subframe.
Such as：For cycle information still for carrying the special subframe of synchronizing signal is 20ms, the base of synchronization level 0
Stand special subframe offset information be the 1st 5ms, then the synchronizing signal of the base station of synchronization level 0 will be within the 20ms periods
The 1st 5ms when sent by the GP of special subframe, base station to be synchronized needs to connect when the 1st 5ms within the 20ms periods at this time
Receive the synchronizing signal that the synchronous source base station is sent；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 will be sent when the 2nd 5ms within the 20ms periods by the GP of special subframe,
Base station to be synchronized needs to receive the synchronizing signal that the synchronous source base station is sent when the 2nd 5ms within the 20ms periods at this time；Together
The offset information for walking the base station special subframe of grade 2 is the 3rd 5ms, then the synchronizing signal of the base station of synchronization level 2 will be
It is sent by the GP of special subframe when the 3rd 5ms in the 20ms periods, base station to be synchronized needs the within the 20ms periods at this time
The synchronizing signal that the synchronous source base station is sent is received when 3 5ms；……；Etc..
It should be noted that base station to be synchronized is after receiving the synchronization configuration information that synchronous source base station is sent, according to
Synchronous configuration information goes to receive the synchronizing signal that synchronous source base station is sent, and can effectively improve 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 signals can also be special synchronous signal, not limit here.
One scheme through the embodiment of the present invention, obtains the synchronization configuration information of synchronous source base station, and confidence is matched in the synchronization
The protection interval GP information of the special subframe of the synchronizing signal for carrying the synchronous source base station is contained in breath；According to described
The GP information for the special subframe for including in synchronous configuration information receives the synchronizing signal that the synchronous source base station is sent, and
It using the synchronizing signal received, keeps synchronizing with the clock between the synchronous source base station, in this way, synchronous source base station profit
Synchronizing signal is carried with the GP information of special subframe, and base station to be synchronized is obtained together using the synchronization configuration information of synchronous source base station
Walk signal so that realize that clock synchronizes between the base station of different synchronization levels, efficiently avoid the base station of different synchronization levels
Between synchronous relay energy force difference the problem of, improve the synchronous efficiency between different synchronization level base stations.
Embodiment two：
As shown in Fig. 2, being a kind of flow diagram of the method for synchronization among base stations provided by Embodiment 2 of the present invention.This hair
Bright embodiment is applied second is that invention with the embodiment of the present invention one under same inventive concept in long-term advancing time division duplex LTE
In TDD system, the method can be as described below.
Step 201：Synchronous source base station determines synchronous configuration information.
Wherein, the protection interval GP letters of the special subframe for carrying synchronizing signal are contained in the synchronous configuration information
Breath.
In step 201, determine that the mode of synchronous configuration information includes but not limited to following manner：
First way：
First, the correspondence between preset synchronization level information and synchronous configuration information is obtained.
Secondly, according to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
The second way：
First, the correspondence between the synchronization level information that core net is sent and synchronous configuration information is received.
Secondly, according to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
Wherein, the GP information of the special subframe contains the cycle information of the special subframe for carrying synchronizing signal
And/or offset information；
The GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different, wherein different GP are
It is determined according to the cycle information of special subframe and/or offset information.
Further comprise what the synchronizing signal for carrying the synchronous source base station occupied in the GP information of the special subframe
Orthogonal frequency division multiplex OFDM symbolic information；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and different synchronization levels
The OFDM symbol information that base station is used to carry the GP of the special subframe of synchronizing signal is different, wherein identical GP is basis
What the cycle information and/or offset information of special subframe determined.
Step 202：GP using the special subframe for carrying synchronizing signal for including in the synchronous configuration information believes
Synchronizing signal is sent to base station to be synchronized by breath.
In step 202, described to utilize the special son for carrying synchronizing signal for including in the synchronous configuration information
Synchronizing signal is sent to base station to be synchronized by the GP information of frame, including：
According to the carrying synchronizing signal for including in the synchronous configuration information of acquisition special subframe cycle information and/
Or offset information, send synchronizing signal on the GP of the special subframe.
Synchronous configuration information is sent to base station to be synchronized, made by two scheme through the embodiment of the present invention, synchronous source base station
It obtains base station to be synchronized and obtains synchronizing signal using the synchronization configuration information that synchronous source base station is sent, realize different synchronization levels
Clock synchronizes between base station, the problem of efficiently avoiding the synchronization among base stations relay energy force difference of different synchronization levels, improves
Synchronous efficiency between different synchronization level base stations.
Embodiment three：
As shown in figure 3, being a kind of structural schematic diagram of the equipment for synchronization among base stations that the embodiment of the present invention three provides, this hair
Bright embodiment three is the invention under same inventive concept with the embodiment of the present invention one and the embodiment of the present invention two, is applied long-term
In evolution time division duplex LTE TDD systems, the equipment includes：Receiving module 11 and synchronization module 12, wherein：
Receiving module 11, the synchronization configuration information for obtaining synchronous source base station, wherein wrapped in the synchronous configuration information
The protection interval GP information of the special subframe of the synchronizing signal for carrying the synchronous source base station is contained；
Synchronization module 12 is received for the GP information according to the special subframe for including in the synchronous configuration information
The synchronizing signal that the synchronous source base station is sent, and using the synchronizing signal received, keep and the synchronous source base station
Between clock synchronize.
In another embodiment of the present invention, the receiving module 11 is specifically used for receiving core net or the synchronization
The synchronization level information for the base station that source base station is sent；According between preset synchronization level information and synchronous configuration information
Correspondence determines the synchronization configuration information of the synchronous source base station.
In another embodiment of the present invention, the receiving module 11 is specifically used for receiving core net or the synchronization
The synchronization level information synchronous configuration information corresponding with synchronization level information for the base station that source base station is sent.
In another embodiment of the present invention, the GP information of the special subframe is contained for carrying synchronizing signal
The cycle information and/or offset information of special subframe；
The GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different, wherein different GP are
It is determined according to the cycle information of special subframe and/or offset information.
Further comprise what the synchronizing signal for carrying the synchronous source base station occupied in the GP information of the special subframe
Orthogonal frequency division multiplex OFDM symbolic information；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and different synchronization levels
The OFDM symbol information that base station is used to carry the GP of the special subframe of synchronizing signal is different, wherein identical GP is basis
What the cycle information and/or offset information of special subframe determined.
The synchronization module 12, specifically for the carrying synchronizing signal for including in the synchronous configuration information according to acquisition
Special subframe cycle information and/or offset information, the synchronous source base station hair is received on the GP of the special subframe
The synchronizing signal sent.
The receiving module 11, specifically for by way of wire transmission or eat dishes without rice or wine monitor mode obtain synchronisation source
The synchronization configuration information of base station.
Implement it should be noted that the equipment described in the embodiment of the present invention three can be the embodiment of the present invention one and the present invention
The function of synchronization source base station described in example two, can be realized by hardware mode, can also be realized by software mode, here
It does not limit.
Example IV：
As shown in figure 4, being a kind of structural schematic diagram of the equipment for synchronization among base stations that the embodiment of the present invention four provides, this hair
Bright example IV is the invention to the embodiment of the present invention three under same inventive concept with the embodiment of the present invention one, is applied long-term
In evolution time division duplex LTE TDD systems, the equipment includes：Determining module 21 and sending module 22, wherein：
Determining module 21, for determining synchronous configuration information, wherein contained in the synchronous configuration information for carrying
The protection interval GP information of the special subframe of synchronizing signal；
Sending module 22, for utilizing the special subframe for carrying synchronizing signal for including in the synchronous configuration information
GP information synchronizing signal is sent to base station to be synchronized.
The determining module 21 is specifically used for obtaining between preset synchronization level information and synchronous configuration information
Correspondence；According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
The determining module 21 is specifically used for receiving between the synchronization level information that core net is sent and synchronous configuration information
Correspondence；According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
The GP information of the special subframe contain the special subframe for carrying synchronizing signal cycle information and/or partially
Shifting amount information；
The GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different, wherein different GP are
It is determined according to the cycle information of special subframe and/or offset information.
Further comprise what the synchronizing signal for carrying the synchronous source base station occupied in the GP information of the special subframe
Orthogonal frequency division multiplex OFDM symbolic information；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and different synchronization levels
The OFDM symbol information that base station is used to carry the GP of the special subframe of synchronizing signal is different, wherein identical GP is basis
What the cycle information and/or offset information of special subframe determined.
The sending module 22, specifically for the carrying synchronizing signal for including in the synchronous configuration information according to acquisition
Special subframe cycle information and/or offset information, send synchronizing signal on the GP of the special subframe.
Implement it should be noted that the equipment described in the embodiment of the present invention four can be the embodiment of the present invention one and the present invention
The function of base station to be synchronized described in example two, can be realized by hardware mode, can also be realized by software mode, here
It does not limit.
In addition, the module described in the embodiment of the present invention three and the embodiment of the present invention four may also appear in a base station
In, a base station not only can be as the synchronization source base station of next stage base station in practical applications, but also can become upper level base station
Base station to be synchronized, do not limit here.
It will be understood by those skilled in the art that the embodiment of the present invention can be provided as method, apparatus（Equipment）Or computer
Program product.Therefore, in terms of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and hardware
Embodiment form.Moreover, the present invention can be used in one or more wherein include computer usable program code meter
Calculation machine usable storage medium（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The computer journey of upper implementation
The form of sequence product.
The present invention be with reference to according to the method for the embodiment of the present invention, device（Equipment）With the flow chart of computer program product
And/or block diagram describes.It should be understood that each flow in flowchart and/or the block diagram can be realized by computer program instructions
And/or the combination of the flow and/or box in box and flowchart and/or the block diagram.These computer programs can be provided to refer to
Enable the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate
One machine so that by the instruction that computer or the processor of other programmable data processing devices execute generate for realizing
The device for the function of being specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (26)
1. a kind of method of synchronization among base stations, which is characterized in that apply in long-term advancing time division duplex LTE TDD system, wrap
It includes：
Obtain the synchronization configuration information of synchronous source base station, wherein contained in the synchronous configuration information described same for carrying
The protection interval GP information of special subframe and the GP information of the special subframe for walking the synchronizing signal of source base station contain use
In the cycle information and/or offset information of the special subframe of carrying synchronizing signal, the special subframe for carrying synchronizing signal
Offset information refer at one in the sending cycle of the special subframe that carries synchronizing signal, will be sent at which all
Synchronizing signal is carried in the GP for the special subframe that phase sends；
According to the GP information for the special subframe for including in the synchronous configuration information, receive what the synchronous source base station was sent
Synchronizing signal, and using the synchronizing signal received, keep synchronizing with the clock between the synchronous source base station.
2. the method as described in claim 1, which is characterized in that the synchronization configuration information for obtaining synchronous source base station, including：
Receive the synchronization level information of the base station of core net or the synchronous source base station transmission；
According to the correspondence between preset synchronization level information and synchronous configuration information, the synchronous source base station is determined
Synchronization configuration information.
3. the method as described in claim 1, which is characterized in that the synchronization configuration information for obtaining synchronous source base station, including：
Synchronization level information and the synchronization level information for receiving the base station of core net or the synchronous source base station transmission are corresponding same
Walk configuration information.
4. the method as described in claims 1 to 3 is any, which is characterized in that the base station of different synchronization levels is for carrying synchronization
The GP of the special subframe of signal is different, wherein different GP is true according to the cycle information and/or offset information of special subframe
Fixed.
5. method as claimed in claim 4, which is characterized in that further comprised in the GP information of the special subframe for carrying
The orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal of the synchronous source base station occupies；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and the base station of different synchronization levels
The OFDM symbol information of the GP of the special subframe for carrying synchronizing signal is different, wherein identical GP is according to special
What the cycle information and/or offset information of subframe determined.
6. method as claimed in claim 4, which is characterized in that according to the special son for including in the synchronous configuration information
The GP information of frame receives the synchronizing signal that the synchronous source base station is sent, including：
According to the special subframe for the carrying synchronizing signal for including in the synchronous configuration information of acquisition cycle information and/or partially
Shifting amount information receives the synchronizing signal that the synchronous source base station is sent on the GP of the special subframe.
7. method as described in claim 1 or 6, which is characterized in that the synchronization configuration information of synchronous source base station is obtained, including：
By way of wire transmission or the mode eating dishes without rice or wine to monitor obtains the synchronization configuration information of synchronous source base station.
8. a kind of method of synchronization among base stations, which is characterized in that apply in long-term advancing time division duplex LTE TDD system, wrap
It includes：
Determine synchronous configuration information, wherein the special subframe for carrying synchronizing signal is contained in the synchronous configuration information
Protection interval GP information and the GP information of the special subframe contain week of the special subframe for carrying synchronizing signal
Phase information and/or offset information, the offset information of the special subframe for carrying synchronizing signal refer to being used to hold at one
It is same by being carried in the GP for the special subframe which sending cycle is sent in the sending cycle for carrying the special subframe of synchronizing signal
Walk signal；
Synchronizing signal is sent using the GP information of the special subframe for the carrying synchronizing signal for including in the synchronous configuration information
To base station to be synchronized.
9. method as claimed in claim 8, which is characterized in that the determining synchronous configuration information, including：
Obtain the correspondence between preset synchronization level information and synchronous configuration information；
According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
10. method as claimed in claim 8, which is characterized in that the determining synchronous configuration information, including：
Receive the correspondence between the synchronization level information and synchronous configuration information that core net is sent；
According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
11. the method as described in claim 8~10 is any, which is characterized in that the base station of different synchronization levels is same for carrying
The GP for walking the special subframe of signal is different, wherein different GP is the cycle information and/or offset information according to special subframe
Determining.
12. method as claimed in claim 11, which is characterized in that further comprised in the GP information of the special subframe for holding
Carry the orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal of synchronous source base station occupies；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and the base station of different synchronization levels
The OFDM symbol information of the GP of the special subframe for carrying synchronizing signal is different, wherein identical GP is according to special
What the cycle information and/or offset information of subframe determined.
13. method as claimed in claim 12, which is characterized in that described to utilize the carrying for including in the synchronous configuration information
Synchronizing signal is sent to base station to be synchronized by the GP information of the special subframe of synchronizing signal, including：
According to the special subframe for the carrying synchronizing signal for including in the synchronous configuration information of acquisition cycle information and/or partially
Shifting amount information, synchronizing signal is sent on the GP of the special subframe.
14. a kind of equipment of synchronization among base stations, which is characterized in that apply in long-term advancing time division duplex LTE TDD system, wrap
It includes：
Receiving module, the synchronization configuration information for obtaining synchronous source base station, wherein contain use in the synchronous configuration information
In the protection interval GP information of the special subframe for the synchronizing signal for carrying the synchronous source base station and the GP of the special subframe
Information contains the cycle information and/or offset information of the special subframe for carrying synchronizing signal, for carrying synchronous letter
Number the offset information of special subframe refer at one in the sending cycle of the special subframe that carries synchronizing signal, will be
Synchronizing signal is carried in the GP for the special subframe which sending cycle is sent；
Synchronization module receives described same for the GP information according to the special subframe for including in the synchronous configuration information
Walk the synchronizing signal that source base station is sent, and using the synchronizing signal that receives, keep between the synchronous source base station
Clock synchronizes.
15. equipment as claimed in claim 14, which is characterized in that
The receiving module is specifically used for receiving the synchronization level information of the base station of core net or the synchronous source base station transmission；
According to the correspondence between preset synchronization level information and synchronous configuration information, the same of the synchronous source base station is determined
Walk configuration information.
16. equipment as claimed in claim 14, which is characterized in that the receiving module is specifically used for receiving core net or institute
State the synchronization level information synchronous configuration information corresponding with synchronization level information for the base station that synchronous source base station is sent.
17. the equipment as described in claim 14~16 is any, which is characterized in that
The GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different, wherein different GP is basis
What the cycle information and/or offset information of special subframe determined.
18. equipment as claimed in claim 17, which is characterized in that further comprised in the GP information of the special subframe for holding
Carry the orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal of the synchronous source base station occupies；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and the base station of different synchronization levels
The OFDM symbol information of the GP of the special subframe for carrying synchronizing signal is different, wherein identical GP is according to special
What the cycle information and/or offset information of subframe determined.
19. equipment as claimed in claim 17, which is characterized in that the synchronization module is specifically used for according to described in acquisition
The cycle information and/or offset information of the special subframe for the carrying synchronizing signal for including in synchronous configuration information, in the spy
The synchronizing signal that the synchronous source base station is sent is received on the GP of different subframe.
20. the equipment as described in claim 14 or 19, which is characterized in that
The receiving module, specifically for by way of wire transmission or eat dishes without rice or wine monitor mode obtain synchronous source base station
Synchronous configuration information.
21. a kind of equipment of synchronization among base stations, which is characterized in that apply in long-term advancing time division duplex LTE TDD system, wrap
It includes：
Determining module, for determining synchronous configuration information, wherein contained in the synchronous configuration information for carrying synchronous letter
Number the protection interval GP information of special subframe and the GP information of the special subframe contain for carrying synchronizing signal
The cycle information and/or offset information of special subframe, the offset information of the special subframe for carrying synchronizing signal refer to
Special subframe at one in the sending cycle of the special subframe that carries synchronizing signal, will be sent in which sending cycle
GP in carry synchronizing signal；
Sending module, for being believed using the GP for the special subframe for carrying synchronizing signal for including in the synchronous configuration information
Synchronizing signal is sent to base station to be synchronized by breath.
22. equipment as claimed in claim 21, which is characterized in that
The determining module is specifically used for obtaining the corresponding pass between preset synchronization level information and synchronous configuration information
System；According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
23. equipment as claimed in claim 21, which is characterized in that
The determining module is specifically used for receiving corresponding between the synchronization level information that core net is sent and synchronous configuration information
Relationship；According to the synchronization level of itself and the correspondence, the synchronization configuration information of itself is determined.
24. the equipment as described in claim 21~23 is any, which is characterized in that
The GP that the base station of different synchronization levels is used to carry the special subframe of synchronizing signal is different, wherein different GP is basis
What the cycle information and/or offset information of special subframe determined.
25. equipment as claimed in claim 24, which is characterized in that further comprised in the GP information of the special subframe for holding
Carry the orthogonal frequency division multiplex OFDM symbolic information that the synchronizing signal of synchronous source base station occupies；
The GP for the special subframe that the base station of different synchronization levels is used to carry synchronizing signal is identical and the base station of different synchronization levels
The OFDM symbol information of the GP of the special subframe for carrying synchronizing signal is different, wherein identical GP is according to special
What the cycle information and/or offset information of subframe determined.
26. equipment as claimed in claim 25, which is characterized in that the sending module is specifically used for according to described in acquisition
The cycle information and/or offset information of the special subframe for the carrying synchronizing signal for including in synchronous configuration information, in the spy
Synchronizing signal is sent on the GP of different subframe.
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| CN106413118B (en) * | 2015-07-31 | 2020-01-17 | 电信科学技术研究院 | Data transmission method and device |
| CN114286436B (en) | 2016-06-23 | 2023-06-23 | 中兴通讯股份有限公司 | Synchronous signal transmitting method, synchronous signal receiving method and communication node |
| US11025473B2 (en) * | 2016-10-24 | 2021-06-01 | Qualcomm Incorporated | Techniques for use in reverse time alignment |
| CN107404754B (en) * | 2017-06-13 | 2020-10-13 | 深圳市市政设计研究院有限公司 | Clock synchronization method and system between LTE base stations in rail transit industry |
| CN110022603B (en) | 2018-01-09 | 2021-04-16 | 大唐移动通信设备有限公司 | Synchronization method and device between base stations |
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