CN102457954A - Synchronization method for home base station and home base station - Google Patents
Synchronization method for home base station and home base station Download PDFInfo
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- CN102457954A CN102457954A CN2010105173367A CN201010517336A CN102457954A CN 102457954 A CN102457954 A CN 102457954A CN 2010105173367 A CN2010105173367 A CN 2010105173367A CN 201010517336 A CN201010517336 A CN 201010517336A CN 102457954 A CN102457954 A CN 102457954A
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Abstract
The invention provides a synchronization method for a home base station and the home base station. The synchronization method comprises the following steps of: determining a signal transmission time delay tp between the home base station and a synchronization object in advance through an uplink access process initiated to the synchronization object and storing the corresponding relation between the synchronization object and the signal transmission time delay tp by the home base station; and detecting a downlink frame DwPTS signal of the synchronization object by the home base station and determining the initial time of the downlink frame DwPTS or the initial time of the uplink frame UpPTS of the home base station according to the detected initial time of the downlink frame DwPTS signal and the signal transmission time delay tp corresponding to the synchronization object. According to the synchronization method and the base station provided by the invention, the uplink synchronization accuracy between the home base station and the synchronization object of the base station can be improved.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of Home eNodeB method for synchronous and Home eNodeB.
Background technology
Along with the development of mobile communication technology, the application prospect of home network is extensive.In order to guarantee normal transfer of data, the Home eNodeB in the home network need be confirmed uplink synchronous with the macro base station in the GSM, and this macro base station can be called the synchronization object or the timing reference source of this Home eNodeB.
Fig. 1 is the method flow diagram that Home eNodeB and macro base station carry out uplink synchronous in the prior art.
As shown in Figure 1, this method comprises:
Fig. 2 is the sequential relationship sketch map that carries out uplink synchronous according to method shown in Figure 1.
Referring to Fig. 2; Home eNodeB with initial moment of the downlink frame (DwPTS) that receives macro base station as the initial moment of the downlink frame of this Home eNodeB; On the basis in initial moment of downlink frame of this Home eNodeB, add the length of uplink/downlink frames and the length of protection time slot (Gp), with gained with as initial moment of the uplink frame (UpPTS) of Home eNodeB.
Visible by Fig. 2; Since Home eNodeB with initial moment of the downlink frame that receives macro base station as the initial moment of the downlink frame of this Home eNodeB; Wherein, downstream signal is transferred to Home eNodeB from macro base station need experience certain time delay T_delay, so the initial moment of Home eNodeB transmission downlink frame lags behind the initial moment that macro base station sends downlink frame; Specifically lag time, length was T_delay; Correspondingly, the initial moment of the uplink frame of Home eNodeB also lags behind the initial moment of uplink frame of macro base station, and in fact Home eNodeB and macro base station do not realize uplink synchronous.
Summary of the invention
In view of this, the invention provides a kind of Home eNodeB method for synchronous and Home eNodeB, so that improve the accuracy of uplink synchronous between Home eNodeB and its synchronization object.
The technical scheme that the present invention adopts specifically is achieved in that
A kind of Home eNodeB method for synchronous, this method comprises:
Home eNodeB is confirmed the signal propagation delay time tp between this Home eNodeB and this synchronization object through the up access procedure of initiating to synchronization object in advance, stores the corresponding relation of this synchronization object and this signal propagation delay time tp;
Home eNodeB is intercepted the downlink frame DwPTS signal of synchronization object, confirms the initial moment of uplink frame UpPTS of this Home eNodeB according to the initial moment that listens to downlink frame DwPTS signal and the signal propagation delay time tp corresponding with this synchronization object.
A kind of Home eNodeB, this Home eNodeB comprise first determination module, memory module, intercept the module and second determination module;
Said first determination module is used for confirming the signal propagation delay time tp between this Home eNodeB and this synchronization object through the up access procedure of initiating to synchronization object;
Said memory module is used to store the corresponding relation of this synchronization object and this signal propagation delay time tp;
The said module of intercepting is used to intercept the downlink frame DwPTS signal of synchronization object;
Said second determination module is used for according to listening to the initial moment of downlink frame DwPTS signal and the initial moment of downlink frame DwPTS or the initial moment of uplink frame UpPTS that the signal propagation delay time tp corresponding with this synchronization object confirms this Home eNodeB.
Visible by technique scheme; Among the present invention; Home eNodeB is confirmed the signal propagation delay time tp between this Home eNodeB and this synchronization object through initiating up access procedure to synchronization object in advance; And store this signal propagation delay time tp, then in each synchronizing process, confirm the initial moment of uplink frame UpPTS of this Home eNodeB according to the initial moment that listens to synchronization object downlink frame DwPTS signal and the signal propagation delay time tp corresponding with this synchronization object.Owing to when Home eNodeB start or installation, confirmed signal propagation delay time tp in advance through up intervention procedure; With directly confirm that according to the initial moment that listens to the downlink frame DwPTS signal of synchronization object the initial moment of uplink frame UpPTS of this Home eNodeB compares in the prior art; In each synchronizing process; Because the present invention has considered the influence of signal propagation delay time tp, therefore can improve the accuracy of uplink synchronous.
Description of drawings
Fig. 1 is the method flow diagram that Home eNodeB and macro base station carry out uplink synchronous in the prior art.
Fig. 2 is the sequential relationship sketch map that carries out uplink synchronous according to method shown in Figure 1.
Fig. 3 is a Home eNodeB method for synchronous flow chart provided by the invention.
Fig. 4 is the method flow diagram of the signal propagation delay time tp between definite Home eNodeB provided by the invention and the synchronization object.
Fig. 5 is a Home eNodeB structure chart provided by the invention.
Embodiment
Fig. 3 is a Home eNodeB method for synchronous flow chart provided by the invention.
As shown in Figure 3, this method comprises:
Wherein, step 301 is preprocessing process, can when the start of Home eNodeB or Home eNodeB is installed, carry out, and later each uplink synchronous process can directly begin to carry out from step 302.
Wherein, When the current synchronization object of intercepting when the family base station is not the synchronization object that signal stored propagation delay time tp is corresponding in advance; This Home eNodeB need be initiated the up access procedure to current synchronization object, with the signal propagation delay time tp between acquisition and the current synchronization object.Particularly, in step 302, Home eNodeB can judge that whether the synchronization object that listens to is the corresponding synchronization object of signal stored propagation delay time tp in advance, if then execution in step 303, if not, then return step 301.
Fig. 4 is the method flow diagram of the signal propagation delay time tp between definite Home eNodeB provided by the invention and the synchronization object.
As shown in Figure 4, this method comprises:
Definite method of the signal propagation delay time tp that step 402 is confirmed can be expressed as following formula:
tp＝(UpPCHADV+128chips-UpPCHRxpath)/2
Wherein 128chips is the length of uplink frame UpPTS.
In other words; Home eNodeB is confirmed as said signal propagation delay time tp: from the moment of the uplink frame UpPTS of this base station expectation delivery time UpPCHADV through the length gained of uplink frame UpPTS, and between this finish time UpPCHRxpath the time segment length half the.
The derivation of formula tp=(UpPCHADV+128chips-UpPCHRxpath)/2 is following:
The length gained result that the UpPCHRxpath finish time of the uplink frame UpPTS signal that synchronization object reception Home eNodeB sends deducts uplink frame UpPTS is the initial moment that this synchronization object receives the uplink frame UpPTS signal of this Home eNodeB transmission; Because when not carrying out uplink synchronous; Home eNodeB is that capable above that frame expectation delivery time UpPCHADV begins to send uplink frame UpPTS signal; And the uplink frame of this Home eNodeB expectation delivery time UpPCHADV is known (according to present agreement; Known its uplink frame expectation delivery time of Home eNodeB UpPCHADV); Signal propagation delay time between supposing from the Home eNodeB to the synchronization object is tp, then sends uplink frame UpPTS signal to said finish time of the UpPCHRxpath that this Home eNodeB receives that this synchronization object sends from Home eNodeB to synchronization object, needs the signal propagation delay time tp of 2 times of experience; Be UpPCHRxpath-128chips+2tp=UpPCHADV, therefore:
tp＝(UpPCHADV+128chips-UpPCHRxpath)/2
Wherein, Home eNodeB confirms that according to the initial moment and the signal propagation delay time tp corresponding with this synchronization object that listen to synchronization object downlink frame DwPTS signal the method in the initial moment of downlink frame DwPTS of this Home eNodeB specifically can comprise:
The result that the initial moment that Home eNodeB is listened to the downlink frame DwPTS signal of synchronization object adds the above signal propagation delay time tp gained confirms as the initial moment of downlink frame DwPTS of this Home eNodeB, specifically can be formulated as:
TTX_DwPCH＝TRX_DwPCH+(UpPCHADV+128chips-UpPCHRxpath)/2
Wherein, TTX_DwPCH is the initial moment of Home eNodeB emission DwPTS signal, and TRX_DwPCH is the initial moment that Home eNodeB listens to the DwPTS signal of synchronization object.
In other words, will confirm as the initial moment of downlink frame DwPTS of this Home eNodeB from initial moment that Home eNodeB listens to the downlink frame DwPTS signal of synchronization object through the moment of gained behind the said signal propagation delay time tp.
Home eNodeB confirms that according to the initial moment and the signal propagation delay time tp corresponding with this synchronization object that listen to synchronization object downlink frame DwPTS signal the method in the initial moment of uplink frame UpPTS of this Home eNodeB specifically can comprise:
The result that the length that the initial moment that Home eNodeB is listened to the downlink frame DwPTS signal of synchronization object adds length and the protection time slot Gp of uplink/downlink frames DwPTS deducts said signal propagation delay time tp gained again confirms as the initial moment of uplink frame UpPTS of this Home eNodeB, specifically can be formulated as:
TTX_UpPCH＝TRX_DwPCH+L(DwPTS+Gp)-tp。
Wherein, tp=(UpPCHADV+128chips-UpPCHRxpath)/2, TTX_UpPCH are the initial moment of Home eNodeB emission uplink frame UpPTS signal, the total length of L (DwPTS+Gp) expression DwPTS and Gp time slot.
In other words; Will from initial moment of downlink frame DwPTS signal that Home eNodeB listens to synchronization object through the length of the length of downlink frame DwPTS and protection time slot Gp after gained constantly, the moment that deducts said signal propagation delay time tp gained is confirmed as the initial moment of uplink frame UpPTS of this Home eNodeB.
The present invention also provides a kind of Home eNodeB, specifically sees also Fig. 5.
Fig. 5 is a Home eNodeB structure chart provided by the invention.
As shown in Figure 5, this Home eNodeB comprises first determination module 501, memory module 502, intercepts the module 503 and second determination module 504.
Wherein, First determination module 501; Be used to receive the signaling message that synchronization object sends; Carry the UpPCHRxpath finish time of the uplink frame UpPTS signal of this this Home eNodeB of synchronization object reception in this signaling message, the uplink frame UpPTS expectation delivery time UpPCHADV that said signal propagation delay time tp is confirmed as this base station adds that the length of uplink frame UpPTS deducts the half the of this finish time of UpPCHRxpath gained result again.
The initial moment determination module of said downlink frame DwPTS is used for the result that the initial moment that Home eNodeB listens to the downlink frame DwPTS signal of synchronization object adds the above signal propagation delay time tp gained is confirmed as initial moment of downlink frame DwPTS of this Home eNodeB.
The initial moment determination module of said uplink frame UpPTS is used for the result that the length that the initial moment that Home eNodeB listens to the downlink frame DwPTS signal of synchronization object adds length and the protection time slot Gp of uplink/downlink frames DwPTS deducts said signal propagation delay time tp gained is again confirmed as initial moment of uplink frame UpPTS of this Home eNodeB.
Correspondingly, first determination module 501 is further used in the judged result of said judge module confirming the signal propagation delay time tp between this Home eNodeB and the current synchronization object for not the time.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (10)
1. a Home eNodeB method for synchronous is characterized in that, this method comprises:
Home eNodeB is confirmed the signal propagation delay time tp between this Home eNodeB and this synchronization object through the up access procedure of initiating to synchronization object in advance, stores the corresponding relation of this synchronization object and this signal propagation delay time tp;
Home eNodeB is intercepted the downlink frame DwPTS signal of synchronization object, confirms the initial moment of downlink frame DwPTS or the initial moment of uplink frame UpPTS of this Home eNodeB according to the initial moment that listens to downlink frame DwPTS signal and the signal propagation delay time tp corresponding with this synchronization object.
2. method for synchronous according to claim 1 is characterized in that, and is said through confirming that to the up access procedure of synchronization object initiation the signal propagation delay time tp between this Home eNodeB and this synchronization object comprises:
Home eNodeB receives the signaling message that synchronization object sends, and carries the UpPCHRxpath finish time that this synchronization object receives the uplink frame UpPTS signal of this Home eNodeB in this signaling message,
Home eNodeB is confirmed as said signal propagation delay time tp: from the moment of the uplink frame UpPTS of this base station expectation delivery time UpPCHADV through the length gained of uplink frame UpPTS, and between this finish time UpPCHRxpath the time segment length half the.
3. method for synchronous according to claim 1 and 2 is characterized in that, the initial moment of downlink frame DwPTS of said definite this Home eNodeB comprises:
To confirm as the initial moment of downlink frame DwPTS of this Home eNodeB from initial moment that Home eNodeB listens to the downlink frame DwPTS signal of synchronization object through the moment of gained behind the said signal propagation delay time tp.
4. method for synchronous according to claim 1 and 2 is characterized in that, the initial moment of uplink frame UpPTS of said definite this Home eNodeB comprises:
Will from initial moment of downlink frame DwPTS signal that Home eNodeB listens to synchronization object through the length of the length of downlink frame DwPTS and protection time slot Gp after gained constantly, the moment that deducts said signal propagation delay time tp gained is confirmed as the initial moment of uplink frame UpPTS of this Home eNodeB.
5. method for synchronous according to claim 1 and 2 is characterized in that, this method further comprises:
Home eNodeB judges that whether current synchronization object is and the corresponding synchronization object of signal stored propagation delay time tp in advance; If; Carry out said the confirm initial moment of downlink frame DwPTS of this Home eNodeB or the step in the initial moment of uplink frame UpPTS; If, do not return the step of confirming the signal propagation delay time tp between this Home eNodeB and the current synchronization object.
6. a Home eNodeB is characterized in that, this Home eNodeB comprises first determination module, memory module, intercepts the module and second determination module;
Said first determination module is used for confirming the signal propagation delay time tp between this Home eNodeB and this synchronization object through the up access procedure of initiating to synchronization object;
Said memory module is used to store the corresponding relation of this synchronization object and this signal propagation delay time tp;
The said module of intercepting is used to intercept the downlink frame DwPTS signal of synchronization object;
Said second determination module is used for according to listening to the initial moment of downlink frame DwPTS signal and the initial moment of downlink frame DwPTS or the initial moment of uplink frame UpPTS that the signal propagation delay time tp corresponding with this synchronization object confirms this Home eNodeB.
7. Home eNodeB according to claim 6 is characterized in that,
Said first determination module; Be used to receive the signaling message that synchronization object sends; Carry the UpPCHRxpath finish time of the uplink frame UpPTS signal of this this Home eNodeB of synchronization object reception in this signaling message; Said signal propagation delay time tp is confirmed as: from the moment of the uplink frame UpPTS of this base station expectation delivery time UpPCHADV through the length gained of uplink frame UpPTS, and the time span between this finish time UpPCHRxpath is half the.
8. according to claim 6 or 7 described Home eNodeB, it is characterized in that said second determination module comprises the initial moment determination module of downlink frame DwPTS;
The initial moment determination module of said downlink frame DwPTS is used for initial moment of the downlink frame DwPTS signal that listens to synchronization object from Home eNodeB was confirmed as through the moment of said signal propagation delay time tp gained initial moment of downlink frame DwPTS of this Home eNodeB.
9. according to claim 6 or 7 described Home eNodeB, it is characterized in that said second determination module comprises the initial moment determination module of uplink frame UpPTS;
The initial moment determination module of said uplink frame UpPTS; Be used for will from initial moment of downlink frame DwPTS signal that Home eNodeB listens to synchronization object through the length of the length of downlink frame DwPTS and protection time slot Gp after moment of gained, the moment that deducts said signal propagation delay time tp gained is confirmed as the initial moment of uplink frame UpPTS of this Home eNodeB.
10. according to claim 6 or 7 described Home eNodeB, it is characterized in that,
The said module of intercepting comprises judge module, is used to judge that whether current synchronization object is and the corresponding synchronization object of signal stored propagation delay time tp in advance;
Said first determination module is further used in the judged result of said judge module confirming the signal propagation delay time tp between this Home eNodeB and the current synchronization object for not the time;
Said second determination module is further used in the judged result of said judge module confirming the initial moment of downlink frame DwPTS or the initial moment of uplink frame UpPTS when being.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103476103A (en) * | 2012-06-07 | 2013-12-25 | 中兴通讯股份有限公司 | Method and device for uplink transmission time adjustment |
| WO2020156343A1 (en) * | 2019-02-01 | 2020-08-06 | 华为技术有限公司 | Clock synchronization method and device |
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| CN101854205A (en) * | 2009-04-02 | 2010-10-06 | 联芯科技有限公司 | Uplink synchronization method and device and network equipment |
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Patent Citations (4)
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| CN101754351A (en) * | 2008-12-05 | 2010-06-23 | 大唐移动通信设备有限公司 | Method, system and apparatus for synchronization of home base station |
| CN101778467A (en) * | 2009-01-14 | 2010-07-14 | 鼎桥通信技术有限公司 | Method for realizing synchronization timing of access point in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system |
| CN101854205A (en) * | 2009-04-02 | 2010-10-06 | 联芯科技有限公司 | Uplink synchronization method and device and network equipment |
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| WO2020156343A1 (en) * | 2019-02-01 | 2020-08-06 | 华为技术有限公司 | Clock synchronization method and device |
| CN111526577A (en) * | 2019-02-01 | 2020-08-11 | 华为技术有限公司 | Clock synchronization method and equipment |
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| CN102457954B (en) | 2014-06-04 |
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