CN104349451B - A kind of method and apparatus synchronized - Google Patents

A kind of method and apparatus synchronized Download PDF

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Publication number
CN104349451B
CN104349451B CN201310347351.5A CN201310347351A CN104349451B CN 104349451 B CN104349451 B CN 104349451B CN 201310347351 A CN201310347351 A CN 201310347351A CN 104349451 B CN104349451 B CN 104349451B
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China
Prior art keywords
user equipment
network side
synchronized cells
source
object synchronization
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CN104349451A (en
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徐伟杰
潘学明
沈祖康
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to CN201310347351.5A priority Critical patent/CN104349451B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
    • H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
    • H04W56/007—Open loop measurement
    • H04W56/0075—Open loop measurement based on arrival time vs. expected arrival time
    • H04W56/008—Open loop measurement based on arrival time vs. expected arrival time detecting arrival of signal based on received raw signal

Abstract

The present embodiments relate to wireless communication technology field, in particular to a kind of method and apparatus synchronized needs to configure MBSFN sub-frame to solve, so that expense is bigger, due to needing suitable special subframe configuration, the problem of increase using difficulty.The embodiment of the present invention includes: the first network side apparatus of management objectives synchronized cells obtains the timing error between object synchronization cell and source synchronized cells, and wherein timing error is determined according to the second uplink Timing Advance of the downlink signal source synchronized cells opposite with the time difference of the downlink signal of source synchronized cells arrival user equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user equipment of object synchronization cell；According to timing error, synchronized with the second network side equipment of managed source synchronized cells.TDD-LTE and FDD-LTE system can be applicable in using the embodiment of the present invention simultaneously, and resource overhead is small, and reduces using difficulty.

Description

A kind of method and apparatus synchronized
Technical field
The present invention relates to wireless communication technology field, in particular to a kind of method and apparatus synchronized.
Background technique
With the increase of evolution and the data service of technology, small cell(cell) concept propose and by height Concern.Small cell usually has lesser coverage area and lower transmission power, by the way that small cell to be deployed in Apart from user's closer proximity, such as indoor and hot spot region, the data rate of user can be promoted.
Existing minizone clock synchronization scheme includes being based on GPS(Global Positioning Systems, and the whole world is fixed Position system)/GNSS(Global Navigation Satellite System, Global Navigation Satellite System.)/Beidou navigation is fixed Position satellite clock synchronization scheme and be based on IEEE(American Institute of Electrical and Electronics Engineers) 1588v2 agreement minizone it is same Step scheme.However, subsequent a large amount of small cell cell may be deployed in indoor scene (such as market, shopping mall Deng), by the way that very high positioning accuracy (100 nanosecond) can be obtained outside the navigation satellites such as GPS/GNSS/ Beidou room, but for Small cell more important above-mentioned in-door covering scene can not normally be made due to this mode of the decaying of navigation satellite signal With；IEEE1588v2 agreement is in ideal backhaul(backhaul link) available good clock synchronism under connection Can, however as the deployment of a large amount of small cell, small cell can also be just under non-ideal backhaul connection Often work, in such cases, since the forward and backward propagation delay time shake of non-ideal backhaul connection seriously causes together Step error is excessive, and the synchronization accuracy of IEEE1588v2 agreement becomes difficult to guarantee.
In Home eNodeB research project, the existing air interface synchronization scheme provided includes the following two kinds:
Scheme 1, Monitor scheme of eating dishes without rice or wine between the base station based on MBSFN sub-frame:
In this scheme, there is main synchronous source cell of the outdoor macro base station in GPS isochronon source as air interface synchronization；To A part of downlink subframe that synchronous Target cell configures its own is MBSFN sub-frame, in the subframe continues, mesh to be synchronized It marks cell and no longer carries out business transmission with the user in its service range, but remove to detect CRS of synchronous source cell etc. with reference to letter Number acquisition time is synchronous.
Scheme 2 is eated dishes without rice or wine Monitor scheme between the base station based on the configuration of TDD special subframe:
In the frame structure of LTE-TDD, it is downlink subframe that subframe 0,1,5,6 is permanent, and subframe 1 and subframe 6 be configured to it is special Subframe, to support different radius of societies, agreement defines the configuration of different special subframes.
Based on TDD special subframe configuration base station between eat dishes without rice or wine Monitor scheme main thought be air interface synchronization main synchronization Source cell configures a kind of special subframe that protection interval (GP) is shorter, and Target cell to be synchronized configures a kind of protection interval (GP) Relatively large special subframe, in this way, Target cell to be synchronized can be relatively same in the GP of the special subframe of its own Preceding several symbols that step source cell is vacated more go to detect the reference signals such as the CRS of synchronous source cell with acquisition time synchronization.It is similar Ground, the object synchronization cell that time synchronization cannot be directly acquired with main synchronous source cell can be in the relatively bigger of itself configuration Other are monitored in special subframe GP obtains the reference signals such as the synchronous CRS of cell with main synchronous source cell to obtain together Step.
For above-mentioned air interface synchronization scheme 1, for TDD-LTE and FDD-LTE applicable air interface synchronization scheme, but in order to The synchronization to Target cell is completed, but needs to introduce MBSFN sub-frame, to guarantee that synchronous precision, this MFSFN subframe also need The lesser time cycle, therefore additional expense is introduced for Target cell, in addition, being taken non-to guarantee synchronization accuracy The transmitting silence scheme of Target cell more increases this expense.
For above-mentioned air interface synchronization scheme 2, it is only applicable to the air interface synchronization scheme of TDD-LTE, is unable to satisfy FDD-LTE's Air interface synchronization demand；Secondly, the program also has many restrictions, such as must limited target cell even for TDD-LTE system Special subframe in GP it is bigger than the GP of the special subframe of synchronous source cell, this is not sometimes achievable when actually arranging net, Such as target source cell has just been configured with very big GP when being the bigger wide covering macrocell of covering radius, Target cell without The bigger more suitable GP of method configuration.
In conclusion the scheme synchronized at present for cell in the case where meeting TDD-LTE and FDD-LTE scene due to MBSFN sub-frame is needed to configure, so that expense is bigger, and in the case where only meeting TDD-LTE scene, due to small to target to be synchronized Area needs suitable special subframe configuration, to increase the difficulty using synchronization scheme.
Summary of the invention
The present invention provides a kind of method and apparatus synchronized, to the side for solving to synchronize for cell at present Case, due to needing to configure MBSFN sub-frame, so that expense is bigger, and is only expiring in the case where meeting TDD-LTE and FDD-LTE scene Under sufficient TDD-LTE scene, due to needing suitable special subframe to configure Target cell to be synchronized, to increase using synchronization The problem of difficulty of scheme.
A kind of method synchronized provided in an embodiment of the present invention, comprising:
The first network side apparatus of management objectives synchronized cells obtains to be determined between object synchronization cell and source synchronized cells When error, wherein the timing error is reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The time difference of user equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user Equipment is determined with respect to the second uplink Timing Advance of source synchronized cells；
The first network side apparatus is set according to the timing error with the second network side for managing the source synchronized cells It is standby to synchronize.
Object synchronization cell of the embodiment of the present invention obtains the timing error between object synchronization cell and source synchronized cells, Described in timing error be that user equipment is reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Time difference, user equipment relative target synchronized cells the first uplink Timing Advance and user equipment it is opposite What the second uplink Timing Advance of source synchronized cells determined, enable the embodiment of the present invention to be suitable for TDD- simultaneously LTE system and FDD-LTE system, and obtain that synchronous resource overhead is small (only to be needed using some signalings of eating dishes without rice or wine, and be further without Introduce MBSFN sub-frame), it can effective lifting system working efficiency when system loading is higher；And the embodiment of the present invention pair Target cell configuration special subframe to be synchronized configures no requirement (NR), to reduce using difficulty.
Preferably, the first network side apparatus obtains the timing error between object synchronization cell and source synchronized cells, Include:
The first network side apparatus is arrived according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells It is set up to time difference of user equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user Second uplink Timing Advance of standby opposite source synchronized cells, determines the timing error.
Object synchronization cell of the embodiment of the present invention obtains downlink signal and source synchronized cells according to object synchronization cell Downlink signal reaches the time difference of user equipment, the first uplink timing of user equipment relative target synchronized cells mentions The object synchronization cell of preceding amount and user equipment with respect to the second uplink Timing Advance determination of source synchronized cells and source Timing error between synchronized cells, to improve efficiency.
Preferably, the timing error is determined according to the following equation in the first network side apparatus:
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is the timing error；ΔTtargetIt is the first uplink Timing Advance；Δ TsourceIt is the second uplink Timing Advance, Δ TdownlinkIt is the time difference.
Object synchronization cell of the embodiment of the present invention uses above-mentioned formula, determining object synchronization cell and source synchronized cells it Between timing error, to improve accuracy rate.
Preferably.The first network side apparatus determines the time difference according to the following steps:
The first network side apparatus receives the time difference from the user equipment；
Wherein, the time difference be the user equipment respectively to the object synchronization cell and the source synchronized cells into After the measurement of row down-going synchronous, according to the first arrival time of the downlink signal of the object synchronization cell and the source synchronized cells Downlink signal the second arrival time determine.
Object synchronization cell of the embodiment of the present invention receives the time difference from the user equipment, to improve effect Rate.
Preferably, the first network side apparatus determines the first uplink Timing Advance according to the following steps:
The first network side apparatus according to the first introduction preamble code from the user equipment received when Between, the first uplink Timing Advance is determined, wherein the first preamble code is the user equipment with described It is sent on the basis of first arrival time.
Object synchronization cell of the embodiment of the present invention determines the first uplink Timing Advance, to improve effect Rate.
Preferably, the first network side apparatus obtain the timing error between object synchronization cell and source synchronized cells it Before, further includes:
Second network side equipment determines according to the time of the 2nd preamble code from user equipment received The second uplink Timing Advance is sent to the first network side apparatus or institute by two uplink Timing Advances State user equipment；
The first network side apparatus receives described the second of second network side equipment or the user equipment to report Uplink Timing Advance, wherein the second preamble code is the user equipment using second arrival time as base What standard was sent.
Object synchronization cell of the embodiment of the present invention receives the second uplink Timing Advance, to improve effect Rate.
Preferably, that the second uplink Timing Advance is sent to object synchronization is small for second network side equipment Before area, further includes:
Corresponding relationship of second network side equipment according to the 2nd preamble code and cell, second will received The corresponding cell of preamble code is as object synchronization cell.
Object synchronization cell can be accurately positioned in source of embodiment of the present invention synchronized cells.
Preferably, the first network side apparatus obtains the timing error between object synchronization cell and source synchronized cells, Include:
The first network side apparatus receives the timing error of the transmission of the user equipment, wherein the timing misses Difference is the user equipment according to the downlink signal of object synchronization cell and the downlink signal arrival user equipment of source synchronized cells Time difference, user equipment relative target synchronized cells the first uplink Timing Advance and user equipment it is same with respect to source What the second uplink Timing Advance of step cell determined.
Object synchronization cell of the embodiment of the present invention receives the timing error from the user equipment, to alleviate target The load of synchronized cells.
Preferably, the first network side apparatus obtain the timing error between object synchronization cell and source synchronized cells it Before, further includes:
The first network side apparatus is according to time of the first preamble code from the user equipment received, really The fixed first uplink Timing Advance；Wherein, the first preamble code is the user equipment with described first It is sent on the basis of arrival time；
The first uplink Timing Advance is sent to the user equipment by the first network side apparatus.
The first uplink Timing Advance is sent to the user and set by object synchronization of embodiment of the present invention cell It is standby, so that user equipment be assisted to determine timing error.
Preferably, the first network side apparatus obtain the timing error between object synchronization cell and source synchronized cells it Before, further includes:
Second network side equipment is according to time of the 2nd preamble code from the user equipment received, really The fixed second uplink Timing Advance；Wherein, the 2nd preamble code is the user equipment with described second It is sent on the basis of arrival time；
The second uplink Timing Advance is sent to the user equipment by second network side equipment.
The second uplink Timing Advance is sent to the user equipment by source of embodiment of the present invention synchronized cells, To assist user equipment to determine timing error.
Preferably, the first network side apparatus obtain the timing error between object synchronization cell and source synchronized cells it Before, further includes:
The first network side apparatus is sent to the user equipment for same to the object synchronization cell and the source Walk the first order of cell initiating random access procedure；Or
The first network side apparatus is sent to the user equipment for connecing at random to object synchronization cell initiation The second order and the source synchronized cells for entering process are sent to the user equipment for initiating to the source synchronized cells The third order of random access procedure.
Object synchronization of embodiment of the present invention cell and source synchronized cells are sent to user equipment orders, so that user be helped to set Preparation plays random access.
Preferably, the first network side apparatus obtain the timing error between object synchronization cell and source synchronized cells it Before, further includes:
The first network side apparatus is chosen while receiving the letter of the object synchronization cell and the source synchronized cells Number it is greater than the user equipment of the user equipment as initiating random access procedure of setting threshold value；
If the first network side apparatus sends random for initiating to the object synchronization cell to the user equipment Second order of access procedure, the first network side apparatus choose as initiating random access procedure the user equipment it Afterwards, further includes:
Second network side equipment described in the notification of user equipment of the first network side apparatus by selection, so that described Second network side equipment is sent to the user equipment for ordering to the third of source synchronized cells initiating random access procedure It enables.
Object synchronization of embodiment of the present invention cell and source synchronized cells can accurately determine user equipment, to improve small The synchronous efficiency in area.
Preferably, including some or all of in following message in first order:
The first preamble code used to object synchronization cell initiating random access procedure；
The resource used to object synchronization cell initiating random access procedure；
Source synchronized cells mark；
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure；
Including some or all of in following message in second order:
The first preamble code used to object synchronization cell initiating random access procedure；
The resource used to object synchronization cell initiating random access procedure；
Including some or all of in following message in the third order:
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure.
A kind of method synchronized provided in an embodiment of the present invention, comprising:
User equipment reaches user equipment according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Time difference, user equipment relative target synchronized cells the first uplink Timing Advance and user equipment it is opposite Second uplink Timing Advance of source synchronized cells determines that the timing between object synchronization cell and source synchronized cells misses Difference；
The timing error is sent to the first network side apparatus for managing the object synchronization cell by the user equipment, So that the first network side apparatus according to the timing error and manage the second network side equipment of the source synchronized cells into Row, which synchronizes, to be synchronized.
Timing error is sent to the object synchronization cell by user equipment of the embodiment of the present invention, wherein the timing error It is that the time difference of user equipment, the use are reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Of the first uplink Timing Advance and user equipment of family equipment relative target synchronized cells with respect to source synchronized cells What two uplink Timing Advances determined, enable the embodiment of the present invention to be suitable for TDD-LTE system and FDD-LTE simultaneously System, and obtain that synchronous resource overhead is small (only to be needed using some signalings of eating dishes without rice or wine, and be not necessary to introduce MBSFN Frame), it can effective lifting system working efficiency when system loading is higher；And the embodiment of the present invention is to Target cell to be synchronized It configures special subframe and configures no requirement (NR), to reduce using difficulty.
Preferably, the timing error is determined according to the following equation in the user equipment:
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is the timing error；ΔTtargetIt is the first uplink Timing Advance；Δ TsourceIt is the second uplink Timing Advance, Δ TdownlinkIt is the time difference.
User equipment of the embodiment of the present invention uses above-mentioned formula, between determining object synchronization cell and source synchronized cells Timing error, to improve accuracy rate.
Preferably, the user equipment determines the time difference according to the following steps:
The user equipment carries out down-going synchronous measurement to the object synchronization cell and the source synchronized cells respectively；
The user equipment is synchronous with the source according to the first arrival time of the downlink signal of the object synchronization cell Second arrival time of the downlink signal of cell, determine the time difference.
User equipment of the embodiment of the present invention determines the time difference, to improve the accuracy rate of cell synchronous.
Preferably, before the user equipment determines timing error, further includes:
The user equipment sends first to the first network side apparatus on the basis of first arrival time Preamble code, and the 2nd preamble is sent to second network side equipment on the basis of second arrival time Code.
User equipment of the embodiment of the present invention sends the first preamble code and the 2nd preamble code, so that user be helped to set It is standby to determine timing error.
Preferably, after the user equipment sends the setting duration after the first preamble code, transmission second Preamble code；Or
After setting duration after the 2nd preamble code of the user equipment transmission, the first preamble code is sent；Or
The user equipment sends the first preamble code and the 2nd preamble code simultaneously.
User equipment of the embodiment of the present invention separately or concurrently sends the first preamble code and the 2nd preamble code, thus It can satisfy different demands.
Preferably, the user equipment receive from the first network side apparatus first order after, with described When sending the first preamble code to the first network side apparatus on the basis of the first arrival time, and being reached with described second Between on the basis of to second network side equipment send the 2nd preamble code；Or
The user equipment reaches after receiving the second order from the first network side apparatus with described first The first preamble code is sent to the first network side apparatus on the basis of time, and is being received from second network After the third order of side apparatus, second is sent to second network side equipment on the basis of second arrival time Preamble code.
Preferably, before the user equipment determines timing error, further includes:
The user equipment receives the first uplink Timing Advance from the first network side apparatus, with And receive the second uplink Timing Advance from second network side equipment.
User equipment of the embodiment of the present invention receives the first uplink Timing Advance and the second uplink timing advance Amount, to realize determining timing error.
A kind of method synchronized provided in an embodiment of the present invention, comprising:
User equipment determines that the downlink signal of object synchronization cell and the downlink signal of source synchronized cells reach user equipment Time difference；
The time difference is sent to the first network side apparatus for managing the object synchronization cell by the user equipment, with Make the first network side apparatus according to the time difference, the first uplink of user equipment relative target synchronized cells Timing Advance and user equipment determine object synchronization cell with respect to the second uplink Timing Advance of source synchronized cells With the timing error between the synchronized cells of source, and according to the timing error and the second network side of the source synchronized cells is managed Equipment synchronizes.
The time difference is sent to the first network for managing the object synchronization cell by user equipment of the embodiment of the present invention Side apparatus so that the first network side apparatus according to the time difference, user equipment relative target synchronized cells One uplink Timing Advance and user equipment determine mesh with respect to the second uplink Timing Advance of source synchronized cells The timing error between synchronized cells and source synchronized cells is marked, and according to the timing error and manages the source synchronized cells Second network side equipment synchronizes, and the embodiment of the present invention is enabled to be suitable for TDD-LTE system and FDD-LTE system simultaneously System, and the resource overhead for obtaining synchronization is small (only need using some signalings of eating dishes without rice or wine, and be not necessary to introduce MBSFN sub-frame), It can effective lifting system working efficiency when system loading is higher；And the embodiment of the present invention configures Target cell to be synchronized Special subframe configures no requirement (NR), to reduce using difficulty.
Preferably, the user equipment determines the time difference, comprising:
The user equipment carries out down-going synchronous measurement to the object synchronization cell and the source synchronized cells respectively；
The user equipment is synchronous with the source according to the first arrival time of the downlink signal of the object synchronization cell Second arrival time of the downlink signal of cell, determine the time difference.
User equipment of the embodiment of the present invention determines the time difference, to improve the accuracy rate of cell synchronous.
Preferably, this method further include:
The user equipment sends first to the first network side apparatus on the basis of first arrival time Preamble code, and the 2nd preamble is sent to second network side equipment on the basis of second arrival time Code.
User equipment of the embodiment of the present invention sends the first preamble code and the 2nd preamble code, so that user be helped to set It is standby to determine timing error.
Preferably, after the user equipment sends the setting duration after the first preamble code, transmission second Preamble code；Or
After setting duration after the 2nd preamble code of the user equipment transmission, the first preamble code is sent；Or
The user equipment sends the first preamble code and the 2nd preamble code simultaneously.
User equipment of the embodiment of the present invention separately or concurrently sends the first preamble code and the 2nd preamble code, thus It can satisfy different demands.
Preferably, the user equipment receive from the first network side apparatus first order after, with described When sending the first preamble code to the first network side apparatus on the basis of the first arrival time, and being reached with described second Between on the basis of to second network side equipment send the 2nd preamble code；Or
The user equipment reaches after receiving the second order from the first network side apparatus with described first The first preamble code is sent to the first network side apparatus on the basis of time, and is being received from second network After the third order of side apparatus, second is sent to second network side equipment on the basis of second arrival time Preamble code.
Preferably, this method further include:
The user equipment turns the second uplink Timing Advance from second network side equipment received Issue the first network side apparatus.
User equipment of the embodiment of the present invention receives the first uplink Timing Advance and the second uplink timing advance Amount, to realize determining timing error.
A kind of first network side apparatus synchronized provided in an embodiment of the present invention, the first network side apparatus manage mesh Synchronized cells are marked, which includes:
Processing module, for obtaining the timing error between object synchronization cell and source synchronized cells, wherein the timing Error is to reach the time difference of user equipment, institute according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The the first uplink Timing Advance and user equipment for stating user equipment relative target synchronized cells are with respect to source synchronized cells The second uplink Timing Advance determine；
Synchronization module, for according to the timing error, with manage the second network side equipment of the source synchronized cells into Row synchronizes.
Object synchronization cell of the embodiment of the present invention obtains the timing error between object synchronization cell and source synchronized cells, Described in timing error be that user equipment is reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Time difference, user equipment relative target synchronized cells the first uplink Timing Advance and user equipment it is opposite What the second uplink Timing Advance of source synchronized cells determined, enable the embodiment of the present invention to be suitable for TDD- simultaneously LTE system and FDD-LTE system, and obtain that synchronous resource overhead is small (only to be needed using some signalings of eating dishes without rice or wine, and be further without Introduce MBSFN sub-frame), it can effective lifting system working efficiency when system loading is higher；And the embodiment of the present invention pair Target cell configuration special subframe to be synchronized configures no requirement (NR), to reduce using difficulty.
Preferably, the processing module is specifically used for:
According to the downlink signal of the downlink signal of object synchronization cell and source synchronized cells reach user equipment time difference, The the first uplink Timing Advance and user equipment of user equipment relative target synchronized cells are with respect to source synchronized cells Second uplink Timing Advance, determines the timing error.
Object synchronization cell of the embodiment of the present invention obtains downlink signal and source synchronized cells according to object synchronization cell Downlink signal reaches the time difference of user equipment, the first uplink timing of user equipment relative target synchronized cells mentions The object synchronization cell of preceding amount and user equipment with respect to the second uplink Timing Advance determination of source synchronized cells and source Timing error between synchronized cells, to improve efficiency.
Preferably, the processing module is specifically used for: the timing error is determined according to the following equation；
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is the timing error；ΔTtargetIt is the first uplink Timing Advance；Δ TsourceIt is the second uplink Timing Advance, Δ TdownlinkIt is the time difference.
Object synchronization cell of the embodiment of the present invention uses above-mentioned formula, determining object synchronization cell and source synchronized cells it Between timing error, to improve accuracy rate.
Preferably, the processing module is specifically used for:
Receive the time difference from the user equipment；
Wherein, the time difference be the user equipment respectively to the object synchronization cell and the source synchronized cells into After the measurement of row down-going synchronous, according to the first arrival time of the downlink signal of the object synchronization cell and the source synchronized cells Downlink signal the second arrival time determine.
Object synchronization cell of the embodiment of the present invention receives the time difference from the user equipment, to improve effect Rate.
Preferably, the processing module is specifically used for:
According to the time of the first preamble code from the user equipment received, first uplink is determined Timing Advance, wherein the first preamble code is that the user equipment is sent on the basis of first arrival time 's.
Object synchronization cell of the embodiment of the present invention determines the first uplink Timing Advance, to improve effect Rate.
Preferably, the processing module is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, second network side equipment is received Or the second uplink Timing Advance of the user equipment to report, wherein the second uplink Timing Advance is institute State what source synchronized cells were determined according to the time of the 2nd preamble code from user equipment received, described second Preamble code is that the user equipment is sent on the basis of second arrival time.
Object synchronization cell of the embodiment of the present invention receives the second uplink Timing Advance, to improve effect Rate.
Preferably, the processing module is specifically used for:
The timing error of the transmission of the user equipment is received, wherein the timing error is the user equipment root The time difference of user equipment, user equipment phase are reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The the first uplink Timing Advance and user equipment of object synchronization cell are passed with respect to the second uplink of source synchronized cells What defeated Timing Advance determined.
Object synchronization cell of the embodiment of the present invention receives the timing error from the user equipment, to alleviate target The load of synchronized cells.
Preferably, the processing module is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, the user is come from according to what is received The time of first preamble code of equipment determines the first uplink Timing Advance；Wherein, described first Preamble code is that the user equipment is sent on the basis of first arrival time；By the first uplink timing Lead is sent to the user equipment.
The first uplink Timing Advance is sent to the user and set by object synchronization of embodiment of the present invention cell It is standby, so that user equipment be assisted to determine timing error.
Preferably, the processing module is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, the transmission of Xiang Suoshu user equipment is used for The first order to the object synchronization cell and source synchronized cells initiating random access procedure；Or
It sends to the user equipment for the second order to the object synchronization cell initiating random access procedure.
Object synchronization of embodiment of the present invention cell and source synchronized cells are sent to user equipment orders, so that user be helped to set Preparation plays random access.
Preferably, the processing module is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, chooses while receiving the target The signal of synchronized cells and the source synchronized cells is greater than the user equipment of setting threshold value as initiating random access procedure The user equipment；
If the processing module is sent to the user equipment for initiating random access mistake to the object synchronization cell Second order of journey, the processing module are also used to:
After choosing as the user equipment of initiating random access procedure, by the notification of user equipment institute of selection The second network side equipment is stated, so that second network side equipment is sent to the user equipment for the source synchronized cells The third order of initiating random access procedure.
Object synchronization of embodiment of the present invention cell and source synchronized cells can accurately determine user equipment, to improve small The synchronous efficiency in area.
A kind of user equipment synchronized provided in an embodiment of the present invention, comprising:
First determining module, for being reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The time difference of user equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user Equipment determines between object synchronization cell and source synchronized cells with respect to the second uplink Timing Advance of source synchronized cells Timing error；
First transmission module, for the timing error to be sent to the first network side for managing the object synchronization cell Equipment, so that the first network side apparatus is set according to the timing error with the second network side for managing the source synchronized cells It is standby to synchronize.
Timing error is sent to the object synchronization cell by user equipment of the embodiment of the present invention, wherein the timing error It is that the time difference of user equipment, the use are reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Of the first uplink Timing Advance and user equipment of family equipment relative target synchronized cells with respect to source synchronized cells What two uplink Timing Advances determined, enable the embodiment of the present invention to be suitable for TDD-LTE system and FDD-LTE simultaneously System, and obtain that synchronous resource overhead is small (only to be needed using some signalings of eating dishes without rice or wine, and be not necessary to introduce MBSFN Frame), it can effective lifting system working efficiency when system loading is higher；And the embodiment of the present invention is to Target cell to be synchronized It configures special subframe and configures no requirement (NR), to reduce using difficulty.
Preferably, first determining module is specifically used for: the timing error is determined according to the following equation；
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is the timing error；ΔTtargetIt is the first uplink Timing Advance；Δ TsourceIt is the second uplink Timing Advance, Δ TdownlinkIt is the time difference.
User equipment of the embodiment of the present invention uses above-mentioned formula, between determining object synchronization cell and source synchronized cells Timing error, to improve accuracy rate.
Preferably, first determining module is specifically used for: determining the time difference according to the following steps；
Down-going synchronous measurement is carried out to the object synchronization cell and the source synchronized cells respectively；It is same according to the target The second arrival time for walking the first arrival time of the downlink signal of cell and the downlink signal of the source synchronized cells, determine institute State the time difference.
User equipment of the embodiment of the present invention determines the time difference, to improve the accuracy rate of cell synchronous.
Preferably, first transmission module is also used to:
Before determining timing error, first is sent to the first network side apparatus on the basis of first arrival time Preamble code, and the 2nd preamble is sent to second network side equipment on the basis of second arrival time Code.
User equipment of the embodiment of the present invention sends the first preamble code and the 2nd preamble code, so that user be helped to set It is standby to determine timing error.
Preferably, first transmission module is specifically used for:
After sending the setting duration after the first preamble code, the 2nd preamble code is sent；Or send second After setting duration after preamble code, the first preamble code is sent；Or the first preamble code and second is sent simultaneously Preamble code.
User equipment of the embodiment of the present invention separately or concurrently sends the first preamble code and the 2nd preamble code, thus It can satisfy different demands.
Preferably, first transmission module is specifically used for:
Receive from the first network side apparatus first order after, on the basis of first arrival time to The first network side apparatus sends the first preamble code, and to second net on the basis of second arrival time Network side apparatus sends the 2nd preamble code；Or
Receive from the first network side apparatus second order after, on the basis of first arrival time to The first network side apparatus sends the first preamble code, and is receiving the third from second network side equipment After order, the 2nd preamble code is sent to second network side equipment on the basis of second arrival time.
Preferably, first transmission module is also used to:
Before determining timing error, the first uplink timing advance from the first network side apparatus is received Amount, and receive the second uplink Timing Advance from second network side equipment.
User equipment of the embodiment of the present invention receives the first uplink Timing Advance and the second uplink timing advance Amount, to realize determining timing error.
The user equipment that another kind provided in an embodiment of the present invention synchronizes, comprising:
Second determining module, for determining the downlink signal of object synchronization cell and the downlink signal arrival of source synchronized cells The time difference of user equipment；
Second transmission module manages the first network side of the object synchronization cell and sets for the time difference to be sent to It is standby so that the first network side apparatus according to the time difference, user equipment relative target synchronized cells first on Row transmission Timing Advance and user equipment determine that target is same with respect to the second uplink Timing Advance of source synchronized cells The timing error between cell and source synchronized cells is walked, and according to the timing error and the second of the management source synchronized cells Network side equipment synchronizes.
The time difference is sent to the first network for managing the object synchronization cell by user equipment of the embodiment of the present invention Side apparatus so that the first network side apparatus according to the time difference, user equipment relative target synchronized cells One uplink Timing Advance and user equipment determine mesh with respect to the second uplink Timing Advance of source synchronized cells The timing error between synchronized cells and source synchronized cells is marked, and according to the timing error and manages the source synchronized cells Second network side equipment synchronizes, and the embodiment of the present invention is enabled to be suitable for TDD-LTE system and FDD-LTE system simultaneously System, and the resource overhead for obtaining synchronization is small (only need using some signalings of eating dishes without rice or wine, and be not necessary to introduce MBSFN sub-frame), It can effective lifting system working efficiency when system loading is higher；And the embodiment of the present invention configures Target cell to be synchronized Special subframe configures no requirement (NR), to reduce using difficulty.
Preferably, second determining module is specifically used for:
Down-going synchronous measurement is carried out to the object synchronization cell and the source synchronized cells respectively；It is same according to the target The second arrival time for walking the first arrival time of the downlink signal of cell and the downlink signal of the source synchronized cells, determine institute State the time difference.
User equipment of the embodiment of the present invention determines the time difference, to improve the accuracy rate of cell synchronous.
Preferably, second transmission module is also used to:
To the first network side apparatus the first preamble code of transmission on the basis of first arrival time, and with The 2nd preamble code is sent to second network side equipment on the basis of second arrival time.
User equipment of the embodiment of the present invention sends the first preamble code and the 2nd preamble code, so that user be helped to set It is standby to determine timing error.
Preferably, second transmission module is specifically used for:
After sending the setting duration after the first preamble code, the 2nd preamble code is sent；Or send second After setting duration after preamble code, the first preamble code is sent；Or the first preamble code and second is sent simultaneously Preamble code.
User equipment of the embodiment of the present invention separately or concurrently sends the first preamble code and the 2nd preamble code, thus It can satisfy different demands.
Preferably, second transmission module is specifically used for:
Receive from the first network side apparatus first order after, on the basis of first arrival time to The first network side apparatus sends the first preamble code, and to second net on the basis of second arrival time Network side apparatus sends the 2nd preamble code；Or
Receive from the first network side apparatus second order after, on the basis of first arrival time to The first network side apparatus sends the first preamble code, and is receiving the third from second network side equipment After order, the 2nd preamble code is sent to second network side equipment on the basis of second arrival time.
Preferably, second transmission module is also used to:
The the second uplink Timing Advance from second network side equipment received is transmitted to described first Network side equipment.
User equipment of the embodiment of the present invention receives the first uplink Timing Advance and the second uplink timing advance Amount, to realize determining timing error.
Detailed description of the invention
Figure 1A is air interface synchronization of embodiment of the present invention scheme schematic diagram；
Figure 1B is the system structure diagram that the embodiment of the present invention synchronizes；
Fig. 2 is the of the first network side apparatus of management objectives synchronized cells in the system that synchronizes of the embodiment of the present invention A kind of structural schematic diagram；
The first of second network side equipment of managed source synchronized cells in the system that Fig. 3 synchronizes for the embodiment of the present invention Kind structural schematic diagram；
The first structural schematic diagram of user equipment in the system that Fig. 4 A synchronizes for the embodiment of the present invention；
Second of structural schematic diagram of user equipment in the system that Fig. 4 B synchronizes for the embodiment of the present invention；
Fig. 5 is the of the first network side apparatus of management objectives synchronized cells in the system that synchronizes of the embodiment of the present invention Two kinds of structural schematic diagrams；
The second of second network side equipment of managed source synchronized cells in the system that Fig. 6 synchronizes for the embodiment of the present invention Kind structural schematic diagram；
The third structural schematic diagram of user equipment in the system that Fig. 7 A synchronizes for the embodiment of the present invention；
4th kind of structural schematic diagram of user equipment in the system that Fig. 7 B synchronizes for the embodiment of the present invention；
Fig. 8 is the method flow schematic diagram that object synchronization of embodiment of the present invention cell synchronizes；
Fig. 9 is the method flow signal that the first user equipment of the embodiment of the present invention assists object synchronization cell to synchronize Figure；
Figure 10 is that the method flow that second of user equipment of the embodiment of the present invention assists object synchronization cell to synchronize shows It is intended to.
Specific embodiment
The embodiment of the present invention initiates random access mistake to object synchronization cell and source synchronized cells using triggering user equipment The method of journey is to obtain the propagation delay information of user equipment and two cells, in conjunction with two cells of user equipment actual measurement Down channel reaches delay inequality, can obtain the timing error of object synchronization cell, the embodiment of the present invention is fitted simultaneously For TDD-LTE system and FDD-LTE system, and obtain synchronous resource overhead it is small (only need using some signalings of eating dishes without rice or wine, and And be not necessary to introduce MBSFN sub-frame), it can effective lifting system working efficiency when system loading is higher；And the present invention Embodiment configures no requirement (NR) to Target cell to be synchronized configuration special subframe, to reduce using difficulty.
The air interface synchronization scheme of the embodiment of the present invention, principle are as shown in Figure 1A:
User equipment carries out down-going synchronous measurement to object synchronization cell and source synchronized cells, obtains the downlink of two cells The reaching time-difference Δ T of signaldownlink=ttarget-tsource。
User equipment is with the downlink timing to the object synchronization cell obtained in object synchronization cell downlink synchronizing process ttargetOn the basis of to object synchronization cell initiate random access；The preamble that object synchronization cell emits user equipment into Row detection, so that it may obtain the first uplink Timing Advance Δ T of user equipment relative target synchronized cellstarget, that is, use The propagation delay time of family equipment relative target synchronized cells.
Similarly, user equipment is with the downlink timing to the source synchronized cells obtained during the down-going synchronous of source synchronized cells tsourceOn the basis of to source synchronized cells initiate random access；The preamble that source synchronized cells emit user equipment is examined It surveys, so that it may obtain second uplink Timing Advance Δ T of the user equipment with respect to source synchronized cellssource。
Due to Δ Ttiming+ΔTtarget=ΔTdownlink+ΔTsource, so object synchronization cell and source synchronized cells are determined When error delta Ttiming=ΔTdownlink-(ΔTtarget-ΔTsource)。
The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification
As shown in Figure 1B, the system that the embodiment of the present invention synchronizes includes: the first network of management objectives synchronized cells Side apparatus 10, managed source synchronized cells the second network side equipment 20 and user equipment 30.
First network side apparatus 10, for obtaining the timing error between object synchronization cell and source synchronized cells, wherein Timing error is the time that user equipment is reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Difference, the first uplink Timing Advance of user equipment relative target synchronized cells and user equipment are with respect to source synchronized cells The second uplink Timing Advance determine；According to timing error, synchronized with the second network side equipment 20.
Wherein, first network of embodiment of the present invention side apparatus is synchronized with the second network side equipment, then first network side The cell of equipment management is also just synchronous with the cell of the second network side equipment management, so first network side apparatus and the second network Side apparatus, which synchronizes, is equal to object synchronization cell and the second network side equipment of managed source synchronized cells synchronizes.
Wherein, the source synchronized cells of the embodiment of the present invention are the more accurate cell of timing of itself, such as timing sources Arise directly from the cell of GPS satellite.Object synchronization cell can by being interacted with neighboring community, and then obtain close on it is small The precise manner of the timing in area, so that it is determined that source synchronized cells；Or the higher cell of timing accuracy can also eat dishes without rice or wine to broadcast The middle rank situation for carrying positioning accuracy, such as 1 grade is precision highest (synchronous GPS clock), and 2 grades are taken second place, in this way, Target cell root According to receive eat dishes without rice or wine adjacent area system broadcasts can also or source synchronized cells situation.
In an implementation, the object synchronization cell of the embodiment of the present invention can be cell, is also possible to other and needs to carry out Synchronous cell, such as macrocell etc..
It should be noted that above-mentioned be merely illustrative, other can determine the mode of source synchronized cells equally applicable Inventive embodiments.
In embodiments of the present invention, the timing error between object synchronization cell and source synchronized cells can be by first network Side apparatus or user equipment determine, are introduced separately below.
Timing error between situation one, object synchronization cell and source synchronized cells is determined by first network side apparatus.
First network side apparatus is reached and is used according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The time difference of family equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user equipment phase To the second uplink Timing Advance of source synchronized cells, timing error is determined.
Preferably, timing error is determined according to the following equation in first network side apparatus:
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is second Uplink Timing Advance Δ TdownlinkIt is the time difference.
In an implementation, first network side apparatus is sent to user equipment for sending out to object synchronization cell and source synchronized cells Play the first order of random access procedure；Or
First network side apparatus is sent to user equipment for the second of object synchronization cell initiating random access procedure Order；Second network side equipment is sent to user equipment for ordering to the third of object synchronization cell initiating random access procedure It enables.
First network side apparatus and the second network side equipment are chosen while receiving object synchronization cell and source synchronized cells Signal be greater than user equipment of the user equipment as initiating random access procedure of setting threshold value.
In an implementation, need to guarantee that first network side apparatus and the second network side equipment choose the same user equipment.Tool Body can be negotiated to determine by first network side apparatus and the second network side equipment.
Correspondingly, user equipment carries out down-going synchronous measurement to object synchronization cell and source synchronized cells respectively；According to mesh The second arrival time for marking the first arrival time of the downlink signal of synchronized cells and the downlink signal of source synchronized cells, when determining Between it is poor, and determining time difference is notified into first network side apparatus；First network side apparatus receives the time from user equipment Difference.
Wherein, user equipment sends the first preamble to first network side apparatus also on the basis of the first arrival time (introduction) code, and the 2nd preamble code is sent to the second network side equipment on the basis of the second arrival time.
Preferably, user equipment send the first preamble code after setting duration after, transmission the 2nd preamble code； Or after the setting duration after user equipment the 2nd preamble code of transmission, send the first preamble code；Or user equipment is same When send the first preamble code and the 2nd preamble code.
Preferably, including some or all of in following message in the first order:
The first preamble code used to object synchronization cell initiating random access procedure；
The resource used to object synchronization cell initiating random access procedure；
Source synchronized cells mark；
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure；
Preferably, including some or all of in following message in the second order:
The first preamble code used to object synchronization cell initiating random access procedure；
The resource used to object synchronization cell initiating random access procedure.
Preferably, including some or all of in following message in third order:
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure.
Then, first network side apparatus is determined according to the time of the first preamble code from user equipment received First uplink Timing Advance.
Second network side equipment determines on second according to the time of the 2nd preamble code from user equipment received Row transmission Timing Advance, and the second determining uplink Timing Advance is sent to first network side apparatus or user sets It is standby, first network side apparatus is transmitted to by user equipment.
Correspondingly, first network side apparatus receives source synchronized cells or the second uplink timing of user equipment to report mentions Preceding amount.
If the second determining uplink Timing Advance is sent to first network side apparatus by the second network side equipment, Then the second network side equipment can be according to the corresponding relationship of the 2nd preamble code and cell, the 2nd preamble code that will be received Corresponding cell is as object synchronization cell.
Timing error between situation two, object synchronization cell and source synchronized cells is determined by user equipment.
User equipment reaches user equipment according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Time difference, user equipment relative target synchronized cells the first uplink Timing Advance and user equipment it is same with respect to source The the second uplink Timing Advance for walking cell, determines the timing error between object synchronization cell and source synchronized cells；It will Timing error is sent to first network side apparatus；
First network side apparatus is synchronized according to the timing error from user equipment received with source synchronized cells.
Preferably, timing error is determined according to the following equation in user equipment:
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is second Uplink Timing Advance Δ TdownlinkIt is the time difference.
In an implementation, first network side apparatus is sent to user equipment for sending out to object synchronization cell and source synchronized cells Play the first order of random access procedure；Or
First network side apparatus is sent to user equipment for the second of object synchronization cell initiating random access procedure Order；Second network side equipment is sent to user equipment for ordering to the third of object synchronization cell initiating random access procedure It enables.
First network side apparatus and the second network side equipment are chosen while receiving object synchronization cell and source synchronized cells Signal be greater than user equipment of the user equipment as initiating random access procedure of setting threshold value.
In an implementation, need to guarantee that first network side apparatus and the second network side equipment choose the same user equipment.Tool Body can be negotiated to determine by first network side apparatus and the second network side equipment.
Correspondingly, user equipment carries out down-going synchronous measurement to object synchronization cell and source synchronized cells respectively；According to mesh The second arrival time for marking the first arrival time of the downlink signal of synchronized cells and the downlink signal of source synchronized cells, when determining Between it is poor, and determining time difference is notified into first network side apparatus；First network side apparatus receives the time from user equipment Difference.
Wherein, user equipment sends the first preamble to first network side apparatus also on the basis of the first arrival time Code, and the 2nd preamble code is sent to the second network side equipment on the basis of the second arrival time.
Preferably, user equipment send the first preamble code after setting duration after, transmission the 2nd preamble code； Or after the setting duration after user equipment the 2nd preamble code of transmission, send the first preamble code；Or user equipment is same When send the first preamble code and the 2nd preamble code.
Preferably, including some or all of in following message in the first order:
The first preamble code used to object synchronization cell initiating random access procedure；
The resource used to object synchronization cell initiating random access procedure；
Source synchronized cells mark；
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure；
Preferably, including some or all of in following message in the second order:
The first preamble code used to object synchronization cell initiating random access procedure；
The resource used to object synchronization cell initiating random access procedure.
Preferably, including some or all of in following message in third order:
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure.
Then, first network side apparatus is determined according to the time of the first preamble code from user equipment received First uplink Timing Advance, and the first determining uplink Timing Advance is sent to user equipment.
Second network side equipment determines on second according to the time of the 2nd preamble code from user equipment received Row transmission Timing Advance, and the second determining uplink Timing Advance is sent to user equipment.
Correspondingly, user equipment receives the first uplink Timing Advance from first network side apparatus, Yi Jijie Receive the second uplink Timing Advance from the second network side equipment.
In specific embodiment, the network side equipment of the embodiment of the present invention can be base station, be also possible in RN( After) equipment, it can also be other network side equipments.Base station can be base transceiver station (BTS), node B(Node B), evolution Node B(eNode B or eNB), Home eNodeB (Home Node B or HNB), evolution Home eNodeB (Home eNode B Or HeNB), relay node (Relay Node or RN), wireless access point (AP), wireless router and similar device etc..
The size of wireless signal overlay area according to provided by base station, base station can provide macrocell (Macro Cell), the covering of Microcell (Micro Cell), picocell (Pico Cell), Femto cell (Femto Cell).It adopts It can be communicated by X2 interface with other base stations with the base station of LTE or LTE-A wireless access technology and form wireless access Net (RAN), base station are communicated by S1 interface with core net.
The network side equipment of the embodiment of the present invention covers the wireless signal of specific region using single antenna or multiple antennas realization Lid, these specific regions are referred to as cell.This concept of cell is also often referred to the user equipment in this particular coverage There is provided service includes the logic entity including base station software and hardware subsystem.One base station can be associated with a cell, small Area can also be divided into the cell of sector shape, and a base station can be associated with multiple sector shape cells at this time.
The network side equipment of the embodiment of the present invention can also be separated using Base Band Unit (BBU) with less radio-frequency head (RRH) Mode realize, remote signal transmission can be carried out using optical fiber between BBU and RRH, can use multiple BBU at this time The mode of concentrated setting uses general purpose processor platform to realize in a manner of cloud computing in turn to support C-RAN framework.
In specific embodiment, the user equipment of the embodiment of the present invention can be mobile phone, tablet computer, notebook electricity Brain, data card, net book, smartwatch, WiMAX hot spot router (MiFi), and the number with wireless communication function The products such as camera, intelligent electric meter, household electrical appliance.User equipment can be using one or more of wireless access technologys and different bases Station carries out wireless communication.
Several examples are set forth below the solution of the present invention is described in detail.Object synchronization cell in the following description The movement of execution is equal to the movement that the first network side apparatus of management objectives synchronized cells executes；Source synchronized cells execute dynamic Make to be equal to the movement that the second network side equipment of managed source synchronized cells executes.
Example one:
1) object synchronization cell sends the first order to the user equipment of selection, for triggering user equipment to object synchronization Cell and source synchronized cells initiating random access procedure；
Wherein, object synchronization cell can determine the user equipment according to the adjacent cell measurement list of user equipment to report The signal of object synchronization cell and source synchronized cells whether can be received simultaneously and signal meets the signal quality thresholding of setting.
Preferably, the first order can be physical layer command PDCCH(Physical Downlink Control Channel, Physical Downlink Control Channel) order.
Wherein, object synchronization cell can be carried into user equipment is sent the first order part in following message or All:
The first PRACH(Physical Random Access used by random access is initiated to object synchronization cell Channel, Physical Random Access Channel) resource, to object synchronization cell initiate random access use the first preamble code, Source synchronized cells ID, the 2nd PRACH resource used by random access is initiated to source synchronized cells and is sent out to source synchronized cells Play the 2nd preamble code that random access uses.
Wherein, the first PRACH resource, the 2nd PRACH resource, the first preamble code and the 2nd preamble code can be with Negotiate to determine by interaction between network side equipment and user equipment or between network side equipment by protocol interface, it can also be It is provided in agreement.
2) user equipment is based on downlink synchronous signal (such as PSS(Primary to object synchronization cell and source synchronized cells Synchronized Signal, primary synchronization signal)/SSS(Secondary Synchronization Signal, auxiliary synchronous letter Number)) or CRS(Cell-specific reference signals, the exclusive pilot signal of cell) etc. reference signals carry out respectively Down-going synchronous measurement, obtains the arrival time t of two cell downlink signalstarget、tsource, and determine two cell downlink signals Reaching time-difference Δ Tdownlink=ttarget-tsource。
3) user equipment with regular hour sequence in the PRACH resource of object synchronization cell to object synchronization cell The downlink timing t for the object synchronization cell that down-going synchronous process obtainstargetOn the basis of emit the first preamble and synchronous in source With the downlink timing t of the source synchronized cells obtained to source synchronized cells down-going synchronous process in the PRACH resource of cellsourceFor The 2nd preamble of reference emission；
Preferably, above-mentioned regular hour sequence includes: user equipment first in object synchronization cell transmission first Preamble, after separated in time, user equipment emits the 2nd preamble in source synchronized cells；Or
For user equipment after the 2nd preamble of source synchronized cells transmitting, separated in time, user equipment is same in target Walk the first preamble of cell transmission；Or
User equipment emits above-mentioned first preamble and second to object synchronization cell and source synchronized cells respectively simultaneously preamble。
4) object synchronization cell calculates user equipment relative target based on the first preamble of the user equipment received The uplink Timing Advance Δ T of synchronized cellstarget, and this information is placed in the random access response to the user equipment User equipment is sent in message；
Equally, twoth preamble calculating user equipment of the source synchronized cells based on the user equipment received is same with respect to source Walk the uplink Timing Advance Δ T of cellsource, and this information is placed in the accidental access response message to user equipment In be sent to user equipment.
5) user equipment receives two cells in the random access response window of object synchronization cell and source synchronized cells respectively Accidental access response message.Wherein, user equipment available use in the accidental access response message of object synchronization cell The uplink uplink Timing Advance Δ T of family equipment relative target synchronized cellstarget, user equipment synchronizes small in source Uplink uplink timing of the available user equipment with respect to source synchronized cells mentions in the accidental access response message in area Preceding amount Δ Tsource.The timing error of user equipment calculating object synchronization cell and source synchronized cells: Δ Ttiming=ΔTdownlink- (ΔTtarget-ΔTsource) and give this information reporting to object synchronization cell.
6) object synchronization cell adjusts the timing of itself according to the timing error of user equipment to report.
Example two:
1) object synchronization cell sends the first order to the user equipment of selection, for triggering user equipment to object synchronization Cell and source synchronized cells initiating random access procedure；
Wherein, object synchronization cell can determine the user equipment according to the adjacent cell measurement list of user equipment to report The signal of object synchronization cell and source synchronized cells whether can be received simultaneously and signal meets the signal quality thresholding of setting.
Preferably, object synchronization cell can be same to target by physical layer command PDCCH order triggering user equipment Walk cell and source synchronized cells initiating random access procedure.
Wherein, the part or complete in following message can be carried in the order that object synchronization cell is sent to user equipment Portion:
To object synchronization cell initiate random access used by the first PRACH resource, to object synchronization cell initiate with Machine accesses the first preamble code used, source synchronized cells ID, initiates second used by random access to source synchronized cells PRACH resource and the 2nd preamble code that random access use is initiated to source synchronized cells.
Wherein, the first PRACH resource, the 2nd PRACH resource, the first preamble code and the 2nd preamble code can be with Negotiate to determine by interaction between network side equipment and user equipment or between network side equipment by protocol interface, it can also be It is provided in agreement.
2) user equipment to object synchronization cell and source synchronized cells be based on downlink synchronous signal (such as PSS/SSS) or The reference signals such as CRS carry out down-going synchronous measurement respectively, obtain the arrival time t of two cell downlink signalstarget、tsource, And determine the reaching time-difference Δ T of two cell downlink signalsdownlink=ttarget-tsource。
3) user equipment with regular hour sequence in the PRACH resource of object synchronization cell to object synchronization cell The downlink timing t for the object synchronization cell that down-going synchronous process obtainstargetOn the basis of emit the first preamble and synchronous in source With the downlink timing t of the source synchronized cells obtained to source synchronized cells down-going synchronous process in the PRACH resource of cellsourceFor The 2nd preamble of reference emission；
Preferably, above-mentioned regular hour sequence includes: user equipment first in object synchronization cell transmission first Preamble, after separated in time, user equipment emits the 2nd preamble in source synchronized cells；Or
For user equipment after the 2nd preamble of source synchronized cells transmitting, separated in time, user equipment is same in target Walk the first preamble of cell transmission；Or
User equipment emits above-mentioned first preamble and second to object synchronization cell and source synchronized cells respectively simultaneously preamble。
4) object synchronization cell calculates user equipment relative target synchronized cells based on the first preamble detected Uplink Timing Advance Δ Ttarget；
Source synchronized cells calculate user equipment based on the 2nd preamble detected and pass with respect to the uplink of source synchronized cells Defeated Timing Advance Δ Tsource, and source synchronized cells send lead Δ T to object synchronization cellsource。
Preferably, source synchronized cells foundation negotiates the second of (or presetting in agreement) with other adjacent areas in advance The corresponding relationship of preambl and cell, the corresponding cell of the 2nd preamble that will test is as object synchronization cell.
5) user equipment reports Δ T to object synchronization celldownlink；
6) object synchronization cell receives the Δ T of user equipment to reportdownlinkAnd receive the Δ T of source synchronized cells transmissionsource Afterwards, according to formula Δ Ttiming=ΔTdownlink-(ΔTtarget-ΔTsource) calculate determining for object synchronization cell and source synchronized cells When error, and adjust according to timing error itself timing adjustment amount.
It should be understood that can be come into effect after user equipment receives the order after step 1) in step 5), The not stringent precedence relationship with step 3) determines Δ T in user equipmentdownlinkIt later can be by Δ TdownlinkIt sends Give object synchronization cell.
In the step 4) of example two, source synchronized cells can be by Δ TsourceIt is placed in the random access response to the user equipment User equipment is sent in message；Subsequent user equipment can be by Δ TsourceWith Δ TdownlinkIt is small to send jointly to object synchronization Area.
In the step 4) of example two, object synchronization cell can also be by Δ TtargetIt is placed in the random access to the user equipment In response message；Subsequent user equipment can be by Δ TtargetWith Δ TdownlinkObject synchronization cell is returned to together.
Example three,
1) object synchronization cell sends the second order to the user equipment of selection, for triggering user equipment to object synchronization Cell initiating random access procedure；Synchronisation source synchronized cells send third order to the user equipment, for triggering user equipment To synchronisation source synchronized cells initiating random access procedure；
Here there are two types of processing modes:
Processing mode one, object synchronization cell can determine the use according to the adjacent cell measurement list of user equipment to report Whether family equipment can receive the signal of object synchronization cell and source synchronized cells simultaneously and signal meets the signal matter of setting Measure thresholding；If can receive simultaneously, and meet the requirements, it is determined that the user equipment is the user of initiating random access procedure Equipment, then object synchronization cell is by the notification of user equipment source Target cell of initiating random access procedure.
Processing mode two, object synchronization cell and source synchronized cells can be arranged according to the adjacent cell measurement of user equipment to report Table meets to determine whether the user equipment can receive the signal of object synchronization cell and source synchronized cells and signal simultaneously The signal quality thresholding of setting.It needs exist for guaranteeing that object synchronization cell is consistent with the user equipment that source synchronized cells are chosen, tool Body can be negotiated to determine by object synchronization cell and source synchronized cells, such as the use that oneself can be chosen by object synchronization cell Family equipment tells source synchronized cells, source synchronized cells to select an object synchronization cell also to select from the user equipment that oneself is chosen The object synchronization cell taken.Preferably, one in the best top n user equipment of signal quality can be chosen.
Preferably, the second order and third order can be physical layer command PDCCH order.
Wherein, object synchronization cell can be carried into user equipment is sent the second order part in following message or All:
Wherein, source synchronized cells can carry the part or complete in following message into the third order that user equipment is sent Portion:
The 2nd PRACH resource used by random access is initiated to source synchronized cells and is initiated to source synchronized cells random Access the 2nd preamble code used.
Wherein, the first PRACH resource, the 2nd PRACH resource, the first preamble code and the 2nd preamble code can be with Negotiate to determine by interaction between network side equipment and user equipment or between network side equipment by protocol interface, it can also be It is provided in agreement.
2) user equipment to object synchronization cell and source synchronized cells be based on downlink synchronous signal (such as PSS/SSS) or The reference signals such as CRS carry out down-going synchronous measurement respectively, obtain the arrival time t of two cell downlink signalstarget、tsource, And determine the reaching time-difference Δ T of two cell downlink signalsdownlink=ttarget-tsource。
3) user equipment based on the object synchronization cell received second order object synchronization cell PRACH resource On with the downlink timing t of the object synchronization cell obtained to object synchronization cell downlink synchronizing processtargetOn the basis of emit first preamble；
User equipment is based on PRACH resource of the third order in synchronisation source synchronized cells for receiving synchronisation source synchronized cells On with the downlink timing t of the synchronisation source synchronized cells obtained to synchronisation source synchronized cells down-going synchronous processsourceOn the basis of emit 2nd preamble.
4) object synchronization cell calculates user equipment relative target based on the first preamble of the user equipment detected The uplink Timing Advance Δ T of synchronized cellstarget。
Synchronisation source synchronized cells calculate user equipment relative synchronization based on the 2nd preamble of the user equipment detected The uplink Timing Advance Δ T of source synchronized cellssource, and source synchronized cells send lead Δ to object synchronization cell Tsource。
Preferably, source synchronized cells foundation negotiates the second of (or presetting in agreement) with other adjacent areas in advance The corresponding relationship of preambl and cell, the corresponding cell of the 2nd preamble that will test is as object synchronization cell.
5) user equipment reports Δ T to object synchronization celldownlink。
6) object synchronization cell receives the Δ T of user equipment to reportdownlinkAnd receive the Δ T of source synchronized cells transmissionsource Afterwards, according to formula Δ Ttiming=ΔTdownlink-(ΔTtarget-ΔTsource) calculate determining for object synchronization cell and source synchronized cells When error, and adjust according to timing error itself timing adjustment amount.
It should be understood that can be come into effect after user equipment receives the order after step 1) in step 5), The not stringent precedence relationship with step 3) determines Δ T in user equipmentdownlinkIt later can be by Δ TdownlinkIt sends Give object synchronization cell.
In step 4), source synchronized cells can be by Δ TsourceIt is placed in the accidental access response message to the user equipment It is sent to user equipment；Subsequent user equipment can be by Δ TsourceWith Δ TdownlinkSend jointly to object synchronization cell.
In the step 4) of example three, object synchronization cell can also be by Δ TtargetIt is placed in the random access to the user equipment In response message；Subsequent user equipment can be by Δ TtargetWith Δ TdownlinkObject synchronization cell is returned to together.
If determining the timing error of object synchronization cell Yu source synchronized cells by user equipment, in step 4, target is same Cell is walked to pass based on the first preamble of the user equipment received the uplink for calculating user equipment relative target synchronized cells Defeated Timing Advance Δ Ttarget, and this information is placed in the accidental access response message to the user equipment and is sent to user Equipment；
Equally, twoth preamble calculating user equipment of the source synchronized cells based on the user equipment received is same with respect to source Walk the uplink Timing Advance Δ T of cellsource, and this information is placed in the accidental access response message to user equipment In be sent to user equipment.
Correspondingly, in the step 5) of example three, random access of the user equipment in object synchronization cell and source synchronized cells is rung Answer the accidental access response message for receiving two cells in window respectively.Wherein, random access of the user equipment in object synchronization cell The uplink uplink Timing Advance Δ of available user equipment relative target synchronized cells in response message Ttarget, the opposite source synchronized cells of user equipment available user equipment in the accidental access response message of source synchronized cells Uplink uplink Timing Advance Δ Tsource.User equipment calculating object synchronization cell is determined with source synchronized cells When error: Δ Ttiming=ΔTdownlink-(ΔTtarget-ΔTsource) and give this information reporting to object synchronization cell.
Correspondingly, in the step 6) of example three, object synchronization cell adjusts itself according to the timing error of user equipment to report Timing.
In above-described embodiment, specific timing error by object synchronization cell or user equipment determine can by network with User equipment is negotiated to determine or arranges in the protocol or determined by network side high level.
As shown in Fig. 2, the network side equipment of management objectives synchronized cells in the system that the embodiment of the present invention synchronizes The first structure includes:
Processing module 200, for obtaining the timing error between object synchronization cell and source synchronized cells, wherein timing is accidentally Difference is to reach the time difference of user equipment, user according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Second of the first uplink Timing Advance and user equipment with respect to source synchronized cells of equipment relative target synchronized cells What uplink Timing Advance determined；
Synchronization module 210, for being synchronized with source synchronized cells according to timing error.
Preferably, processing module 200 is specifically used for:
According to the downlink signal of the downlink signal of object synchronization cell and source synchronized cells reach user equipment time difference, The the first uplink Timing Advance and user equipment of user equipment relative target synchronized cells are with respect to source synchronized cells Second uplink Timing Advance, determines timing error.
Preferably, processing module 200 is specifically used for: timing error is determined according to the following equation；
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is second Uplink Timing Advance, Δ TdownlinkIt is the time difference.
Preferably, processing module 200 is specifically used for:
Receive the time difference from user equipment；
Wherein, the time difference is that user equipment carries out down-going synchronous measurement to object synchronization cell and source synchronized cells respectively When afterwards, according to the second arrival of the first arrival time of the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Between determine.
Preferably, processing module 200 is specifically used for:
According to the time of the first preamble code from user equipment received, the first uplink timing advance is determined Amount, wherein the first preamble code is that user equipment is sent on the basis of the first arrival time.
Preferably, processing module 200 is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, receives source synchronized cells or user sets Standby the second uplink Timing Advance reported, wherein the second uplink Timing Advance is source synchronized cells according to receiving Time of the 2nd preamble code from user equipment determine that the 2nd preamble code is user equipment with the second arrival It is sent on the basis of time.
Preferably, processing module 200 is specifically used for:
The timing error of the transmission of user equipment is received, wherein timing error is user equipment according to object synchronization cell The downlink signal of downlink signal and source synchronized cells reaches time difference of user equipment, user equipment relative target synchronized cells First uplink Timing Advance and user equipment are determined with respect to the second uplink Timing Advance of source synchronized cells 's.
Preferably, processing module 200 is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, user equipment is come from according to what is received The first preamble code time, determine the first uplink Timing Advance；Wherein, the first preamble code is that user sets For what is sent on the basis of the first arrival time；First uplink Timing Advance is sent to user equipment.
Preferably, processing module 200 is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, send to user equipment for mesh Mark the first order of synchronized cells and source synchronized cells initiating random access procedure；Or
It sends to user equipment for the second order to object synchronization cell initiating random access procedure.
Preferably, processing module 200 is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, chooses while receiving object synchronization The signal of cell and source synchronized cells is greater than user equipment of the user equipment of setting threshold value as initiating random access procedure；
If object synchronization cell is sent to user equipment for the second of object synchronization cell initiating random access procedure Order, processing module 200 are also used to:
After choosing as the user equipment of initiating random access procedure, the notification of user equipment source of selection is synchronized small Area, so that the second network side equipment is sent to user equipment for ordering to the third of source synchronized cells initiating random access procedure It enables.
As shown in figure 3, in the system that the embodiment of the present invention synchronizes managed source synchronized cells the second network side equipment The first structure include:
Processing module 300 determines second for the time according to the 2nd preamble code from user equipment received Timing Advance；Wherein, the 2nd preamble code is that user equipment is sent on the basis of the second arrival time, second reach when Between after to be user equipment carry out down-going synchronous measurement to source synchronized cells, the arrival user equipment of the downlink signal of source synchronized cells Time；
Sending module 310, for the second Timing Advance to be sent to object synchronization cell or user equipment, so that target Synchronized cells or user equipment reach user according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells and set The first Timing Advance and user equipment of standby time difference, user equipment relative target synchronized cells are with respect to source synchronized cells Second Timing Advance determines the timing error between object synchronization cell and source synchronized cells, and carries out object synchronization cell It is synchronous.
Preferably, processing module 300 is also used to:
Before second Timing Advance is sent to object synchronization cell, according to the correspondence of the 2nd preamble code and cell Relationship, using the corresponding cell of the 2nd preamble code received as object synchronization cell.
Preferably, processing module 300 is also used to:
Before determining the second Timing Advance, send to user equipment for source synchronized cells initiating random access procedure Third order.
Preferably, processing module 300 is also used to:
Using the user equipment of the object synchronization cell received notice as the user equipment of initiating random access procedure.
Preferably, including some or all of in following message in third order:
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure.
In an implementation, in an implementation, the first network side equipment may also managed source synchronized cells.Second of network side is set It is standby may also management objectives synchronized cells, so the function of the first network side equipment and second of network side equipment can close In one entity (i.e. the module of the first network side equipment and second of network side equipment is in an entity), select as needed Select the function of the function or second of network side equipment using the first network side equipment.
As shown in Figure 4 A, the first structure of user equipment includes: in the system that the embodiment of the present invention synchronizes
First determining module 400, for according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Reach the time difference of user equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user Equipment determines between object synchronization cell and source synchronized cells with respect to the second uplink Timing Advance of source synchronized cells Timing error；
First transmission module 410, for timing error to be sent to first network side apparatus, so that object synchronization cell root It is synchronized according to timing error and source synchronized cells.
Preferably, the first determining module 400 is specifically used for: timing error is determined according to the following equation；
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is second Uplink Timing Advance, Δ TdownlinkIt is the time difference.
Preferably, the first determining module 400 is specifically used for: determining the time difference according to the following steps；
Down-going synchronous measurement is carried out to object synchronization cell and source synchronized cells respectively；According to the downlink of object synchronization cell Second arrival time of the downlink signal of the first arrival time and source synchronized cells of signal, determine the time difference.
Preferably, the first transmission module 410 is also used to:
Before determining timing error, the first preamble is sent to first network side apparatus on the basis of the first arrival time Code, and the 2nd preamble code is sent to the second network side equipment on the basis of the second arrival time.
Preferably, the first transmission module 410 is specifically used for:
After sending the setting duration after the first preamble code, the 2nd preamble code is sent；Or send second After setting duration after preamble code, the first preamble code is sent；Or the first preamble code and second is sent simultaneously Preamble code.
Preferably, the first transmission module 410 is specifically used for:
After receiving the first order from first network side apparatus, to first network on the basis of the first arrival time Side apparatus sends the first preamble code, and sends second to the second network side equipment on the basis of the second arrival time Preamble code；Or
After receiving the second order from first network side apparatus, to first network on the basis of the first arrival time Side apparatus sends the first preamble code, and after receiving the third order from the second network side equipment, arrives with second The 2nd preamble code is sent to the second network side equipment on the basis of up to the time.
Preferably, the first transmission module 410 is also used to:
Before determining timing error, the first uplink Timing Advance from first network side apparatus is received, and Receive the second uplink Timing Advance from the second network side equipment.
As shown in Figure 4 B, second of structure of user equipment includes: in the system that the embodiment of the present invention synchronizes
Second determining module 450, for determining the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Reach the time difference of user equipment；
Second transmission module 460, for the time difference to be sent to the first network side apparatus of management objectives synchronized cells, with Make first network side apparatus according to the first uplink Timing Advance of time difference, user equipment relative target synchronized cells with And user equipment determines object synchronization cell and source synchronized cells with respect to the second uplink Timing Advance of source synchronized cells Between timing error, and synchronized according to timing error and the second network side equipment of managed source synchronized cells.
Preferably, the second determining module 450 is specifically used for:
Down-going synchronous measurement is carried out to object synchronization cell and source synchronized cells respectively；According to the downlink of object synchronization cell Second arrival time of the downlink signal of the first arrival time and source synchronized cells of signal, determine the time difference.
Preferably, the second transmission module 460 is also used to:
The first preamble code is sent to first network side apparatus on the basis of the first arrival time, and is reached with second The 2nd preamble code is sent to the second network side equipment on the basis of time.
Preferably, the second transmission module 460 is specifically used for:
After sending the setting duration after the first preamble code, the 2nd preamble code is sent；Or send second After setting duration after preamble code, the first preamble code is sent；Or the first preamble code and second is sent simultaneously Preamble code.
Preferably, the second transmission module 460 is specifically used for:
After receiving the first order from first network side apparatus, to first network on the basis of the first arrival time Side apparatus sends the first preamble code, and sends second to the second network side equipment on the basis of the second arrival time Preamble code；Or
After receiving the second order from first network side apparatus, to first network on the basis of the first arrival time Side apparatus sends the first preamble code, and after receiving the third order from the second network side equipment, arrives with second The 2nd preamble code is sent to the second network side equipment on the basis of up to the time.
Preferably, the second transmission module 460 is also used to:
The the second uplink Timing Advance from the second network side equipment received is transmitted to first network side to set It is standby.
In an implementation, the function of the user equipment of Fig. 4 A and Fig. 4 B can close in an entity, and selection makes as needed With specific function.That is the first determining module 400, the first transmission module 340, the second determining module 450 and the second transmission module 460 can close in an entity；A determining module can also be synthesized with the first determining module 400 and the second determining module 450, First transmission module 410 and the second transmission module 460 synthesize a transmission module, and close in an entity.
As shown in figure 5, the first network side of management objectives synchronized cells is set in the system that the embodiment of the present invention synchronizes Second standby of structure include:
Processor 500, for obtaining the timing error between object synchronization cell and source synchronized cells, wherein timing error It is that the time difference of user equipment, Yong Hushe are reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The the first uplink Timing Advance and user equipment of standby relative target synchronized cells with respect to the second of source synchronized cells on Row transmission Timing Advance determines；According to timing error, synchronized with the second network side equipment of managed source synchronized cells；
Transceiver 510, for transmitting information under control of the processor 500.
Preferably, processor 500 is specifically used for:
According to the downlink signal of the downlink signal of object synchronization cell and source synchronized cells reach user equipment time difference, The the first uplink Timing Advance and user equipment of user equipment relative target synchronized cells are with respect to source synchronized cells Second uplink Timing Advance, determines timing error.
Preferably, processor 500 is specifically used for: timing error is determined according to the following equation；
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is second Uplink Timing Advance, Δ TdownlinkIt is the time difference.
Preferably, processor 500 is specifically used for:
The time difference from user equipment is received by transceiver 510；
Wherein, the time difference is that user equipment carries out down-going synchronous measurement to object synchronization cell and source synchronized cells respectively When afterwards, according to the second arrival of the first arrival time of the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Between determine.
Preferably, processor 500 is specifically used for:
According to the time of the first preamble code from user equipment received by transceiver 510, determine on first Row transmission Timing Advance, wherein the first preamble code is that user equipment is sent on the basis of the first arrival time.
Preferably, processor 500 is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, it is same that source is received by receiver 510 The the second uplink Timing Advance for walking cell or user equipment to report, wherein the second uplink Timing Advance is that source is same Walk what cell was determined according to the time of the 2nd preamble code from user equipment received, the 2nd preamble code is user What equipment was sent on the basis of the second arrival time.
Preferably, processor 500 is specifically used for:
The timing error of the transmission of user equipment is received by receiver 510, wherein timing error be user equipment according to The downlink signal of object synchronization cell is opposite with the time difference of the downlink signal of source synchronized cells arrival user equipment, user equipment Second uplink of the first uplink Timing Advance and user equipment of object synchronization cell with respect to source synchronized cells What Timing Advance determined.
Preferably, processor 500 is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, received according to by receiver 510 The first preamble code from user equipment time, determine the first uplink Timing Advance；Wherein, first Preamble code is that user equipment is sent on the basis of the first arrival time；First uplink Timing Advance is sent to User equipment.
Preferably, processor 500 is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, set by receiver 510 to user Preparation is sent for the first order to object synchronization cell and source synchronized cells initiating random access procedure；Or
It is sent to user equipment for the second life to object synchronization cell initiating random access procedure by receiver 510 It enables.
Preferably, processor 500 is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, chooses while receiving object synchronization The signal of cell and source synchronized cells is greater than user equipment of the user equipment of setting threshold value as initiating random access procedure.
Wherein, in Fig. 5, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor 500 The various circuits for the memory that the one or more processors and memory 520 of representative represent link together.Bus architecture is also Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can be linked together, these are all It is it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 510 can To be multiple element, that is, includes transmitter and receiver, the list for communicating over a transmission medium with various other devices is provided Member.Processor 500, which is responsible for management bus architecture and common processing, memory 520, can store processor 500 and is executing operation When used data.
Processor 500, which is responsible for management bus architecture and common processing, memory 520, can store processor 500 and is holding Used data when row operation.
As shown in fig. 6, in the system that the embodiment of the present invention synchronizes managed source synchronized cells the second network side equipment Second of structure include:
Processor 600 determines that second is fixed for the time according to the 2nd preamble code from user equipment received When lead；Wherein, the 2nd preamble code is that user equipment is sent on the basis of the second arrival time, the second arrival time After to be user equipment carry out down-going synchronous measurement to source synchronized cells, the arrival user equipment of the downlink signal of source synchronized cells Time；Second Timing Advance is sent to object synchronization cell or user equipment by transceiver 610, so that object synchronization is small Area or user equipment according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells reach user equipment when Between poor, user equipment relative target synchronized cells the first Timing Advances and user equipment it is second fixed with respect to source synchronized cells When lead determine the timing error between object synchronization cell and source synchronized cells, and synchronize object synchronization cell
Transceiver 610, for transmitting information under the control of processor 600.
Preferably, processor 600 is also used to:
Before second Timing Advance is sent to object synchronization cell by transceiver 610, according to the 2nd preamble The corresponding relationship of code and cell, using the corresponding cell of the 2nd preamble code received by transceiver 610 as object synchronization Cell.
Preferably, processor 600 is also used to:
Before determining the second Timing Advance, sent to user equipment for being sent out to source synchronized cells by transceiver 610 Play the third order of random access procedure.
Preferably, processor 600 is also used to:
It is sent to user equipment for the second order to source synchronized cells initiating random access procedure by transceiver 610 Before, the signal for choosing while receiving object synchronization cell and source synchronized cells is greater than the user equipment conduct for setting threshold value The user equipment of initiating random access procedure.
Preferably, including some or all of in following message in third order:
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure.
Wherein, in Fig. 6, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor 600 The various circuits for the memory that the one or more processors and memory 620 of representative represent link together.Bus architecture is also Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can be linked together, these are all It is it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 610 can To be multiple element, that is, includes transmitter and receiver, the list for communicating over a transmission medium with various other devices is provided Member.Processor 600, which is responsible for management bus architecture and common processing, memory 620, can store processor 600 and is executing operation When used data.
Processor 600, which is responsible for management bus architecture and common processing, memory 620, can store processor 600 and is holding Used data when row operation.
In an implementation, in an implementation, the first network side equipment may also managed source synchronized cells.Second of network side is set It is standby may also management objectives synchronized cells, so the function of the first network side equipment and second of network side equipment can close In one entity (i.e. the module of the first network side equipment and second of network side equipment is in an entity), select as needed Select the function of the function or second of network side equipment using the first network side equipment.
I.e. processor 500, transceiver 510, processor 600 and transceiver 610 can close in an entity；It can also locate It manages device 500 and processor 600 synthesizes a processor, transceiver 510 and transceiver 610 synthesize a transceiver, and close In one entity.
As shown in Figure 7 A, the third structure of user equipment includes: in the system that the embodiment of the present invention synchronizes
Processor 700, for reaching and using according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The time difference of family equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user equipment phase To the second uplink Timing Advance of source synchronized cells, determine that the timing between object synchronization cell and source synchronized cells misses Difference；Timing error is sent to the first network side apparatus of management objectives synchronized cells by transceiver 710, so that first network Side apparatus is synchronized according to timing error and the second network side equipment of managed source synchronized cells；
Transceiver 710, for transmitting information under the control of processor 700.
Preferably, processor 700 is specifically used for: timing error is determined according to the following equation；
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is second Uplink Timing Advance, Δ TdownlinkIt is the time difference.
Preferably, processor 700 is specifically used for: determining the time difference according to the following steps；
Down-going synchronous measurement is carried out to object synchronization cell and source synchronized cells respectively；According to the downlink of object synchronization cell Second arrival time of the downlink signal of the first arrival time and source synchronized cells of signal, determine the time difference.
Preferably, processor 700 is also used to:
Before determining timing error, sent out by transceiver 610 to first network side apparatus on the basis of the first arrival time The first preamble code is sent, and sends the to the second network side equipment by transceiver 610 on the basis of the second arrival time Two preamble codes.
Preferably, processor 700 is also used to:
After the setting duration after the first preamble code of transmission of transceiver 710, passes through transceiver 710 and send second Preamble code；Or by transceiver 710 send the 2nd preamble code after setting duration after, sent out by transceiver 710 Send the first preamble code；Or the first preamble code and the 2nd preamble code are sent by transceiver 710 simultaneously.
Preferably, processor 700 is specifically used for:
After receiving the first order from first network side apparatus by transceiver 710, it is with the first arrival time Benchmark sends the first preamble code to first network side apparatus by transceiver 710, and on the basis of the second arrival time The 2nd preamble code is sent to the second network side equipment by transceiver 710；Or
After receiving the second order from first network side apparatus by transceiver 710, it is with the first arrival time Benchmark sends the first preamble code to first network side apparatus by transceiver 710, and is receiving from the second network After the third order of side apparatus, second is sent to the second network side equipment by transceiver 710 on the basis of the second arrival time Preamble code.
Preferably, processor 700 is also used to:
Before determining timing error, it is fixed that the first uplink from first network side apparatus is received by transceiver 710 When lead, and pass through transceiver 710 receive the second uplink Timing Advance from the second network side equipment.
Wherein, in fig. 7, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor The various circuits for the memory that 700 one or more processors represented and memory 720 represent link together.Bus architecture Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can also be linked together, these It is all it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 710 It can be multiple element, that is, include transmitter and receiver, provide for over a transmission medium being communicated with various other devices Unit.Processor 700, which is responsible for management bus architecture and common processing, memory 720, can store processor 700 and is executing behaviour Used data when making.
Processor 700, which is responsible for management bus architecture and common processing, memory 720, can store processor 700 and is holding Used data when row operation.
As shown in Figure 7 B, the 4th kind of structure of user equipment includes: in the system that the embodiment of the present invention synchronizes
Processor 750, for determining the downlink signal of object synchronization cell and the downlink signal arrival use of source synchronized cells The time difference of family equipment；Time difference is sent to the first network side apparatus of management objectives synchronized cells by transceiver 760, with Make first network side apparatus according to the first uplink Timing Advance of time difference, user equipment relative target synchronized cells with And user equipment determines object synchronization cell and source synchronized cells with respect to the second uplink Timing Advance of source synchronized cells Between timing error, and synchronized according to timing error and the first network side apparatus of managed source synchronized cells；
Transceiver 760, for transmitting information under the control of processor 750.
Preferably, processor 750 is specifically used for:
Down-going synchronous measurement is carried out to object synchronization cell and source synchronized cells respectively；According to the downlink of object synchronization cell Second arrival time of the downlink signal of the first arrival time and source synchronized cells of signal, determine the time difference.
Preferably, processor 750 is also used to:
The first preamble code is sent to first network side apparatus by transceiver 760 on the basis of the first arrival time, And the 2nd preamble code is sent to the second network side equipment by transceiver 760 on the basis of the second arrival time.
Preferably, processor 750 is specifically used for:
After the setting duration after the first preamble code of transmission of transceiver 760, passes through transceiver 760 and send second Preamble code；Or by transceiver 760 send the 2nd preamble code after setting duration after, sent out by transceiver 760 Send the first preamble code；Or the first preamble code and the 2nd preamble code are sent by transceiver 710 simultaneously.
Preferably, processor 750 is specifically used for:
After receiving the first order from first network side apparatus by transceiver 760, it is with the first arrival time Benchmark sends the first preamble code to first network side apparatus by transceiver 760, and on the basis of the second arrival time The 2nd preamble code is sent to the second network side equipment by transceiver 760；Or
After receiving the second order from first network side apparatus by transceiver 760, it is with the first arrival time Benchmark sends the first preamble code to first network side apparatus by transceiver 760, and is receiving from the second network After the third order of side apparatus, second is sent to the second network side equipment by transceiver 760 on the basis of the second arrival time Preamble code.
Preferably, processor 750 is also used to:
The the second uplink Timing Advance from source synchronized cells received by transceiver 760 is passed through into transceiver 760 are transmitted to object synchronization cell.
Wherein, in figure 7b, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor The various circuits for the memory that 750 one or more processors represented and memory 770 represent link together.Bus architecture Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can also be linked together, these It is all it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 760 It can be multiple element, that is, include transmitter and receiver, provide for over a transmission medium being communicated with various other devices Unit.For different user equipmenies, user interface 780, which can also be, external the interface for needing equipment is inscribed, connection Equipment includes but is not limited to keypad, display, loudspeaker, microphone, control stick etc..
Processor 750, which is responsible for management bus architecture and common processing, memory 770, can store processor 750 and is holding Used data when row operation.
In an implementation, the function of the user equipment of Fig. 7 A and Fig. 7 B can close in an entity, and selection makes as needed With specific function.I.e. processor 700, transceiver 710, processor 750 and transceiver 760 can close in an entity；? It can handle device 700 and processor 750 synthesize a processor, transceiver 710 and transceiver 760 synthesize a transceiver, and And it closes in an entity.
If Fig. 8 is the method flow schematic diagram that object synchronization of embodiment of the present invention cell synchronizes；
Step 801, the first network side apparatus acquisition object synchronization cell of management objectives synchronized cells and source synchronized cells Between timing error, wherein timing error is the downlink signal of downlink signal according to object synchronization cell and source synchronized cells Reach the time difference of user equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user Equipment is determined with respect to the second uplink Timing Advance of source synchronized cells；
Step 802, first network side apparatus according to timing error, with the second network side equipment of managed source synchronized cells into Row synchronizes.
In embodiments of the present invention, the timing error between object synchronization cell and source synchronized cells can be by first network Side apparatus or user equipment determine, are introduced separately below.
Timing error between situation one, object synchronization cell and source synchronized cells is determined by first network side apparatus.
Specifically, first network side apparatus is according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Reach the time difference of user equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user Equipment determines timing error with respect to the second uplink Timing Advance of source synchronized cells.
Preferably, timing error is determined according to the following equation in first network side apparatus:
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is second Uplink Timing Advance, Δ TdownlinkIt is the time difference.
Preferably, first network side apparatus determines the time difference according to the following steps:
First network side apparatus receives the time difference from user equipment；
Wherein, the time difference is that user equipment carries out down-going synchronous measurement to object synchronization cell and source synchronized cells respectively When afterwards, according to the second arrival of the first arrival time of the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Between determine.
Preferably, first network side apparatus determines the first uplink Timing Advance according to the following steps:
First network side apparatus determines on first according to the time of the first preamble code from user equipment received Row transmission Timing Advance, wherein the first preamble code is that user equipment is sent on the basis of the first arrival time.
Preferably, before first network side apparatus obtains the timing error between object synchronization cell and source synchronized cells, Further include:
Second network side equipment determines on second according to the time of the 2nd preamble code from user equipment received Row transmission Timing Advance, is sent to first network side apparatus or user equipment for the second uplink Timing Advance；
First network side apparatus receives the second uplink timing advance of the second network side equipment or user equipment to report Amount, wherein the 2nd preamble code is that user equipment is sent on the basis of the second arrival time.
Preferably, before the second uplink Timing Advance is sent to object synchronization cell by the second network side equipment, Further include:
Corresponding relationship of second network side equipment according to the 2nd preamble code and cell, the 2nd preamble that will be received The corresponding cell of code is as object synchronization cell.
Timing error between situation two, object synchronization cell and source synchronized cells is determined by user equipment.
Specifically, first network side apparatus receives the timing error of the transmission of user equipment, wherein timing error is user Equipment reaches the time difference of user equipment, user according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Second of the first uplink Timing Advance and user equipment with respect to source synchronized cells of equipment relative target synchronized cells What uplink Timing Advance determined.
Preferably, before first network side apparatus obtains the timing error between object synchronization cell and source synchronized cells, Further include:
First network side apparatus determines on first according to the time of the first preamble code from user equipment received Row transmission Timing Advance；Wherein, the first preamble code is that user equipment is sent on the basis of the first arrival time；
First uplink Timing Advance is sent to user equipment by first network side apparatus.
Preferably, before first network side apparatus obtains the timing error between object synchronization cell and source synchronized cells, Further include:
Second network side equipment determines on second according to the time of the 2nd preamble code from user equipment received Row transmission Timing Advance；Wherein, the 2nd preamble code is that user equipment is sent on the basis of the second arrival time；
Second uplink Timing Advance is sent to user equipment by the second network side equipment.
For situation one and situation two:
Preferably, before first network side apparatus obtains the timing error between object synchronization cell and source synchronized cells, Further include:
First network side apparatus is sent to user equipment for initiating to connect at random to object synchronization cell and source synchronized cells Enter the first order of process；Or
First network side apparatus is sent to user equipment for the second of object synchronization cell initiating random access procedure Order；
If object synchronization cell is sent to user equipment for the second of object synchronization cell initiating random access procedure Order, after object synchronization cell is chosen as the user equipment of initiating random access procedure, further includes:
First network side apparatus is by the notification of user equipment source synchronized cells of selection, so that the second network side equipment is to user Equipment is sent for the third order to source synchronized cells initiating random access procedure.
Preferably, before object synchronization cell obtains the timing error between object synchronization cell and source synchronized cells, also Include:
Object synchronization cell is chosen while being received to first network side apparatus and the signal of source synchronized cells is greater than setting door User equipment of the user equipment of limit value as initiating random access procedure；
Object synchronization cell is chosen while being received to second network side equipment and the signal of source synchronized cells is greater than setting door User equipment of the user equipment of limit value as initiating random access procedure.
Preferably, including some or all of in following message in the first order:
The first preamble code used to object synchronization cell initiating random access procedure；
The resource used to object synchronization cell initiating random access procedure；
Source synchronized cells mark；
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure；
Including some or all of in following message in second order:
The first preamble code used to object synchronization cell initiating random access procedure；
The resource used to object synchronization cell initiating random access procedure；
Including some or all of in following message in third order:
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure.
As shown in figure 9, the method packet that the first user equipment of embodiment of the present invention auxiliary object synchronization cell synchronizes It includes:
Step 901, user equipment are reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The time difference of user equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user equipment Second uplink Timing Advance of opposite source synchronized cells, determines the timing between object synchronization cell and source synchronized cells Error；
Timing error is sent to the first network side apparatus of management objectives synchronized cells by step 902, user equipment, so that First network side apparatus is synchronized according to timing error and the second network side equipment of managed source synchronized cells.
Preferably, timing error is determined according to the following equation in user equipment:
ΔTtiming=ΔTdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is second Uplink Timing Advance, Δ TdownlinkIt is the time difference.
Preferably, user equipment determines the time difference according to the following steps:
User equipment carries out down-going synchronous measurement to object synchronization cell and source synchronized cells respectively；
User equipment is believed according to the first arrival time of the downlink signal of object synchronization cell and the downlink of source synchronized cells Number the second arrival time, determine the time difference.
Preferably, before user equipment determines timing error, further includes:
User equipment on the basis of the first arrival time to first network side apparatus send the first preamble code, and with The 2nd preamble code is sent to the second network side equipment on the basis of second arrival time.
Preferably, user equipment send the first preamble code after setting duration after, transmission the 2nd preamble code； Or
After setting duration after user equipment the 2nd preamble code of transmission, the first preamble code is sent；Or
User equipment sends the first preamble code and the 2nd preamble code simultaneously.
Preferably, before user equipment determines timing error, further includes:
User equipment receives the first uplink Timing Advance from first network side apparatus, and receives from the Second uplink Timing Advance of two network side equipments.
As shown in Figure 10, the method packet that second of user equipment auxiliary object synchronization cell of the embodiment of the present invention synchronizes It includes:
Step 1001, user equipment determine that the downlink signal of object synchronization cell and the downlink signal of source synchronized cells reach The time difference of user equipment；
Time difference is sent to the first network side apparatus of management objectives synchronized cells by step 1002, user equipment, so that First network side apparatus according to the time difference, user equipment relative target synchronized cells the first uplink Timing Advance and User equipment with respect to the second uplink Timing Advance of source synchronized cells, determine object synchronization cell and source synchronized cells it Between timing error, and synchronized according to timing error and the second network side equipment of managed source synchronized cells.
Preferably, user equipment determines the time difference, comprising:
User equipment carries out down-going synchronous measurement to object synchronization cell and source synchronized cells respectively；
User equipment is believed according to the first arrival time of the downlink signal of object synchronization cell and the downlink of source synchronized cells Number the second arrival time, determine the time difference.
Preferably, this method further include:
User equipment on the basis of the first arrival time to first network side apparatus send the first preamble code, and with The 2nd preamble code is sent to the second network side equipment on the basis of second arrival time.
Preferably, user equipment send the first preamble code after setting duration after, transmission the 2nd preamble code； Or
After setting duration after user equipment the 2nd preamble code of transmission, the first preamble code is sent；Or
User equipment sends the first preamble code and the 2nd preamble code simultaneously.
Preferably, this method further include:
The the second uplink Timing Advance from the second network side equipment received is transmitted to first by user equipment Network side equipment.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more, The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or 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 counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart 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 Mind 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 (33)

1. a kind of method synchronized, which is characterized in that this method comprises:
The first network side apparatus of management objectives synchronized cells obtains the timing between object synchronization cell and source synchronized cells and misses Difference, wherein the timing error is to reach user according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The time difference of equipment, user equipment relative target synchronized cells the first uplink Timing Advance and user equipment What the second uplink Timing Advance of opposite source synchronized cells determined；
The first network side apparatus according to the timing error, with manage the second network side equipment of the source synchronized cells into Row synchronizes；
The first network side apparatus obtains before the timing error between object synchronization cell and source synchronized cells, further includes:
The first network side apparatus choose and meanwhile receive the object synchronization cell and the source synchronized cells signal it is big In the user equipment of the user equipment as initiating random access procedure of setting threshold value；
The first network side apparatus is sent to the user equipment for initiating random access mistake to the object synchronization cell Second order of journey；And
Second network side equipment described in the notification of user equipment of the first network side apparatus by selection, so that described second Network side equipment is sent to the user equipment for the third order to source synchronized cells initiating random access procedure.
2. the method as described in claim 1, which is characterized in that the first network side apparatus obtains object synchronization cell and source Timing error between synchronized cells, comprising:
The first network side apparatus is reached and is used according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The time difference of family equipment, the first uplink Timing Advance of user equipment relative target synchronized cells and user equipment phase To the second uplink Timing Advance of source synchronized cells, the timing error is determined.
3. method according to claim 2, which is characterized in that the first network side apparatus is determined according to the following equation described Timing error:
ΔTtiming=Δ Tdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is the timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is The second uplink Timing Advance, Δ TdownlinkIt is the time difference.
4. method according to claim 2, which is characterized in that the first network side apparatus is according to the following steps determination Time difference:
The first network side apparatus receives the time difference from the user equipment；
Wherein, the time difference is that the user equipment respectively carries out down the object synchronization cell and the source synchronized cells After row synchro measure, according under the first arrival time of the downlink signal of the object synchronization cell and the source synchronized cells What the second arrival time of row signal determined.
5. method as claimed in claim 4, which is characterized in that the first network side apparatus is according to the following steps determination First uplink Timing Advance:
The first network side apparatus determines institute according to the time of the first preamble code from the user equipment received The first uplink Timing Advance is stated, wherein when the first preamble code is that the user equipment is reached with described first Between on the basis of send.
6. method as claimed in claim 4, which is characterized in that the first network side apparatus obtains object synchronization cell and source Before timing error between synchronized cells, further includes:
Second network side equipment determines on second according to the time of the 2nd preamble code from user equipment received Row transmission Timing Advance, is sent to the first network side apparatus or the use for the second uplink Timing Advance Family equipment；
The first network side apparatus receives second uplink of second network side equipment or the user equipment to report Timing Advance is transmitted, wherein the second preamble code is that the user equipment is sent out on the basis of second arrival time It send.
7. method as claimed in claim 6, which is characterized in that second network side equipment determines second uplink When lead be sent to before object synchronization cell, further includes:
Corresponding relationship of second network side equipment according to the 2nd preamble code and cell, the 2nd preamble that will be received The corresponding cell of code is as object synchronization cell.
8. the method as described in claim 1, which is characterized in that the first network side apparatus obtains object synchronization cell and source Timing error between synchronized cells, comprising:
The first network side apparatus receives the timing error of the transmission of the user equipment, wherein the timing error is The user equipment according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells reach user equipment when Between poor, user equipment relative target synchronized cells the first uplink Timing Advances and user equipment synchronized with respect to source it is small What the second uplink Timing Advance in area determined.
9. method according to claim 8, which is characterized in that the first network side apparatus obtains object synchronization cell and source Before timing error between synchronized cells, further includes:
The first network side apparatus determines institute according to the time of the first preamble code from the user equipment received State the first uplink Timing Advance；Wherein, the first preamble code is the user equipment with the object synchronization It is sent on the basis of first arrival time of the downlink signal of cell；
The first uplink Timing Advance is sent to the user equipment by the first network side apparatus.
10. method according to claim 8, which is characterized in that the first network side apparatus obtain object synchronization cell with Before timing error between the synchronized cells of source, further includes:
Second network side equipment determines institute according to the time of the 2nd preamble code from the user equipment received State the second uplink Timing Advance；Wherein, it is small to be that the user equipment is synchronized with the source for the 2nd preamble code It is sent on the basis of second arrival time of the downlink signal in area；
The second uplink Timing Advance is sent to the user equipment by second network side equipment.
11. the method as described in claim 1, which is characterized in that it is described second order in include following message in part or All:
The first preamble code used to object synchronization cell initiating random access procedure；
The resource used to object synchronization cell initiating random access procedure；
Including some or all of in following message in the third order:
The 2nd preamble code used to source synchronized cells initiating random access procedure；
The resource used to source synchronized cells initiating random access procedure.
12. a kind of method synchronized, which is characterized in that this method comprises:
User equipment according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells reach user equipment when Between poor, user equipment relative target synchronized cells the first uplink Timing Advances and user equipment it is same with respect to source The the second uplink Timing Advance for walking cell, determines the timing error between object synchronization cell and source synchronized cells；
The timing error is sent to the first network side apparatus for managing the object synchronization cell by the user equipment, so that The first network side apparatus is according to the timing error and manages the second network side equipment progress of the source synchronized cells together Step；
The user equipment determines the time difference according to the following steps:
The user equipment carries out down-going synchronous measurement to the object synchronization cell and the source synchronized cells respectively；
First arrival time and the source synchronized cells of the user equipment according to the downlink signal of the object synchronization cell Downlink signal the second arrival time, determine the time difference；
The user equipment determines before timing error, further includes:
The user equipment is after receiving the second order from the first network side apparatus, with first arrival time On the basis of to the first network side apparatus send the first preamble code, and receive come from second network side set After standby third order, the 2nd preamble is sent to second network side equipment on the basis of second arrival time Code.
13. method as claimed in claim 12, which is characterized in that the timing is determined according to the following equation in the user equipment Error:
ΔTtiming=Δ Tdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is the timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is The second uplink Timing Advance, Δ TdownlinkIt is the time difference.
14. method as claimed in claim 12, which is characterized in that the user equipment send the first preamble code it After setting duration afterwards, the 2nd preamble code is sent；Or
After the user equipment sends the setting duration after the 2nd preamble code, the first preamble code is sent；Or
The user equipment sends the first preamble code and the 2nd preamble code simultaneously.
15. the method as described in claim 12~14 is any, which is characterized in that the user equipment determine timing error it Before, further includes:
The user equipment receives the first uplink Timing Advance from the first network side apparatus, Yi Jijie Receive the second uplink Timing Advance from second network side equipment.
16. a kind of method synchronized, which is characterized in that this method comprises:
User equipment determine object synchronization cell downlink signal and source synchronized cells downlink signal reach user equipment when Between it is poor；
The time difference is sent to the first network side apparatus for managing the object synchronization cell by the user equipment, so that institute First network side apparatus is stated according to the time difference, the first uplink timing of user equipment relative target synchronized cells Lead and user equipment determine object synchronization cell and source with respect to the second uplink Timing Advance of source synchronized cells Timing error between synchronized cells, and according to the second network side equipment of the timing error and the management source synchronized cells It synchronizes；
The user equipment determines the time difference, comprising:
The user equipment carries out down-going synchronous measurement to the object synchronization cell and the source synchronized cells respectively；
First arrival time and the source synchronized cells of the user equipment according to the downlink signal of the object synchronization cell Downlink signal the second arrival time, determine the time difference；
The user equipment determines before timing error, further includes:
The user equipment is after receiving the second order from the first network side apparatus, with first arrival time On the basis of to the first network side apparatus send the first preamble code, and receive come from second network side set After standby third order, the 2nd preamble is sent to second network side equipment on the basis of second arrival time Code.
17. the method described in claim 16, which is characterized in that the user equipment is sent after the first preamble code After setting duration, the 2nd preamble code is sent；Or
After setting duration after the 2nd preamble code of the user equipment transmission, the first preamble code is sent；Or
The user equipment sends the first preamble code and the 2nd preamble code simultaneously.
18. the method as described in claim 16 or 17, which is characterized in that this method further include:
The the second uplink Timing Advance from second network side equipment received is transmitted to by the user equipment The first network side apparatus.
19. a kind of first network side apparatus synchronized, which is characterized in that the first network side apparatus management objectives are synchronous Cell, the first network side apparatus include:
Processing module, for obtaining the timing error between object synchronization cell and source synchronized cells, wherein the timing error It is that the time difference of user equipment, the use are reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Of the first uplink Timing Advance and user equipment of family equipment relative target synchronized cells with respect to source synchronized cells What two uplink Timing Advances determined；
Synchronization module, for being carried out with the second network side equipment for managing the source synchronized cells same according to the timing error Step；
The processing module is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, chooses while receiving the object synchronization The signal of cell and the source synchronized cells is greater than the user equipment of setting threshold value as the described of initiating random access procedure User equipment；
It sends to the user equipment for the second order to the object synchronization cell initiating random access procedure, and will Second network side equipment described in the notification of user equipment chosen, so that second network side equipment is to the user equipment It sends for the third order to source synchronized cells initiating random access procedure.
20. first network side apparatus as claimed in claim 19, which is characterized in that the processing module is specifically used for by as follows Mode obtains the timing error between object synchronization cell and source synchronized cells:
The time difference of user equipment, user are reached according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells Second of the first uplink Timing Advance and user equipment with respect to source synchronized cells of equipment relative target synchronized cells Uplink Timing Advance determines the timing error.
21. first network side apparatus as claimed in claim 20, which is characterized in that the processing module is specifically used for by as follows Mode determines the timing error:
ΔTtiming=Δ Tdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is the timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is The second uplink Timing Advance, Δ TdownlinkIt is the time difference.
22. first network side apparatus as claimed in claim 20, which is characterized in that the processing module is specifically used for by as follows Mode determines the time difference:
Receive the time difference from the user equipment；
Wherein, the time difference is that the user equipment respectively carries out down the object synchronization cell and the source synchronized cells After row synchro measure, according under the first arrival time of the downlink signal of the object synchronization cell and the source synchronized cells What the second arrival time of row signal determined.
23. first network side apparatus as claimed in claim 22, which is characterized in that the processing module is specifically used for by as follows Mode determines the first uplink Timing Advance:
According to the time of the first preamble code from the user equipment received, the first uplink timing is determined Lead, wherein the first preamble code is that the user equipment is sent on the basis of first arrival time.
24. first network side apparatus as claimed in claim 22, which is characterized in that the processing module is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, second network side equipment or institute are received The second uplink Timing Advance of user equipment to report is stated, wherein the second uplink Timing Advance is the source Synchronized cells are according to the determination of the time of the 2nd preamble code from user equipment received, the 2nd preamble code The user equipment is sent on the basis of second arrival time.
25. first network side apparatus as claimed in claim 19, which is characterized in that the processing module is specifically used for by as follows Mode obtains the timing error between object synchronization cell and source synchronized cells:
The timing error of the transmission of the user equipment is received, wherein the timing error is the user equipment according to mesh Mark the downlink signal mesh opposite with the time difference of the downlink signal of source synchronized cells arrival user equipment, user equipment of synchronized cells The first uplink Timing Advance and the user equipment for marking synchronized cells are fixed with respect to the second uplink of source synchronized cells When lead determine.
26. first network side apparatus as claimed in claim 25, which is characterized in that the processing module is also used to:
Before obtaining the timing error between object synchronization cell and source synchronized cells, the user equipment is come from according to what is received The first preamble code time, determine the first uplink Timing Advance；Wherein, the first preamble code It is that the user equipment is sent on the basis of the first arrival time of the downlink signal of the object synchronization cell；By described One uplink Timing Advance is sent to the user equipment.
27. a kind of user equipment synchronized, which is characterized in that the user equipment includes:
First determining module, for reaching user according to the downlink signal of object synchronization cell and the downlink signal of source synchronized cells The time difference of equipment, user equipment relative target synchronized cells the first uplink Timing Advance and user equipment Second uplink Timing Advance of opposite source synchronized cells, determines the timing between object synchronization cell and source synchronized cells Error；
First transmission module manages the first network side of the object synchronization cell and sets for the timing error to be sent to It is standby, so that second network side equipment of the first network side apparatus according to the timing error and the management source synchronized cells It synchronizes；
First determining module is specifically used for determining the time difference as follows:
Down-going synchronous measurement is carried out to the object synchronization cell and the source synchronized cells respectively；It is small according to the object synchronization Second arrival time of the downlink signal of the first arrival time of the downlink signal in area and the source synchronized cells, when determining described Between it is poor；
First transmission module is also used to:
Before determining the timing error, after receiving the second order from the first network side apparatus, with described The first preamble code is sent to the first network side apparatus on the basis of first arrival time, and is being received from described After the third order of second network side equipment, the is sent to second network side equipment on the basis of second arrival time Two preamble codes.
28. user equipment as claimed in claim 27, which is characterized in that first determining module is specifically used for by such as lower section Formula determines the timing error:
ΔTtiming=Δ Tdownlink-(ΔTtarget-ΔTsource)
Wherein, Δ TtimingIt is the timing error；ΔTtargetIt is the first uplink Timing Advance；ΔTsourceIt is The second uplink Timing Advance, Δ TdownlinkIt is the time difference.
29. user equipment as claimed in claim 27, which is characterized in that first transmission module is specifically used for by such as lower section Formula sends the 2nd preamble code:
After sending the setting duration after the first preamble code, the 2nd preamble code is sent；Or first is sent simultaneously Preamble code and the 2nd preamble code；
First transmission module is specifically used for sending the first preamble code as follows:
After sending the setting duration after the 2nd preamble code, the first preamble code is sent；Or first is sent simultaneously Preamble code and the 2nd preamble code.
30. the user equipment as described in claim 27~29 is any, which is characterized in that first transmission module is also used to:
Before determining timing error, the first uplink Timing Advance from the first network side apparatus is received, And receive the second uplink Timing Advance from second network side equipment.
31. a kind of user equipment synchronized, which is characterized in that the user equipment includes:
Second determining module, for determining the downlink signal of object synchronization cell and the downlink signal arrival user of source synchronized cells The time difference of equipment；
Second transmission module, for the time difference to be sent to the first network side apparatus for managing the object synchronization cell, So that the first network side apparatus is passed according to the first uplink of the time difference, user equipment relative target synchronized cells Defeated Timing Advance and user equipment determine that object synchronization is small with respect to the second uplink Timing Advance of source synchronized cells Timing error between the synchronized cells Qu Yuyuan, and according to the second network of the timing error and the management source synchronized cells Side apparatus synchronizes；
Second determining module is specifically used for determining the time difference as follows:
Down-going synchronous measurement is carried out to the object synchronization cell and the source synchronized cells respectively；It is small according to the object synchronization Second arrival time of the downlink signal of the first arrival time of the downlink signal in area and the source synchronized cells, when determining described Between it is poor；
Second transmission module is also used to:
Before determining the timing error, after receiving the second order from the first network side apparatus, with described The first preamble code is sent to the first network side apparatus on the basis of first arrival time, and is being received from described After the third order of second network side equipment, the is sent to second network side equipment on the basis of second arrival time Two preamble codes.
32. user equipment as claimed in claim 31, which is characterized in that second transmission module is specifically used for by such as lower section Formula sends the 2nd preamble code:
After sending the setting duration after the first preamble code, the 2nd preamble code is sent；Or first is sent simultaneously Preamble code and the 2nd preamble code；
Second transmission module is specifically used for sending the first preamble code as follows:
After sending the setting duration after the 2nd preamble code, the first preamble code is sent；Or first is sent simultaneously Preamble code and the 2nd preamble code.
33. the user equipment as described in claim 31 or 32, which is characterized in that second transmission module is also used to:
The the second uplink Timing Advance from second network side equipment received is transmitted to the first network Side apparatus.
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