CN102469484B - Base station out-of-service method, base station and time server - Google Patents
Base station out-of-service method, base station and time server Download PDFInfo
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- CN102469484B CN102469484B CN201010546270.4A CN201010546270A CN102469484B CN 102469484 B CN102469484 B CN 102469484B CN 201010546270 A CN201010546270 A CN 201010546270A CN 102469484 B CN102469484 B CN 102469484B
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Abstract
The invention discloses a base station out-of-service method, which comprises the following steps that: A. when a time server enters a time synchronic maintaining state, the time server notifies self state of the base station and utilizes a built-in clock to perform the timing, and the time information is transmitted to the base station in real time; and B. the base station receives the time information from the time server, when the base station cannot receive the time information, the base station enters the time synchronic maintaining state, since the state notice from the time server is received, deviation delta T of the current time relative to the standard time is calculated in real time, when the delta T is larger than a preset threshold value, the out-of-service operation is executed. The invention also discloses a base station and a time server. By utilizing the method and the device, the interference can be reduced.
Description
Technical field
The present invention relates to mobile communication technology, particularly a kind of base station service quit method, a kind of base station and a kind of time server.
Background technology
Current, the requirement of mobile communications network to time synchronized is more and more higher.Such as, for 3G (Third Generation) Moblie (3G, 3rd Generation) code division multiple access (CDMA in network, Code Division Multiple Access) 2000 systems and TD SDMA (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) system, need to carry out correct time between wherein each base station synchronous, otherwise, will interference be produced between each base station, thus cause occurring that business such as normally can not to carry out at the problem.
In prior art, usually all global positioning system (GPS can be installed in each base station, Global Positioning System) etc. satellite reception module, each base station from standard time of satellite, thus keeps time synchronized to each other by satellite reception module real-time reception.
If satellite reception module breaks down, cause normally receiving the standard time from satellite, so base station will the synchronous hold mode of entry time, rely on self onboard clock to carry out timing, described onboard clock is generally crystal clock, and the limited precision of crystal clock, through after a period of time, namely can there is deviation with the standard time, if deviation is comparatively large, then can receives surrounding normal and cause interference from the base station of the standard time of satellite.For avoiding interference, after when entering, the duration of synchronous hold mode reaches scheduled duration, base station will be closed automatically, exit service, referred to as moving back clothes.
In addition, along with Precision Time Protocol (PTP, Precision Time Protocol) appearance, the time synchronized realized between base station by transmission network becomes possibility gradually, namely provide the mode that another realizes the time synchronized between base station, concrete which kind of mode that adopts can be decided according to the actual requirements.
Fig. 1 is the existing mode schematic diagram being realized the time synchronized between base station by transmission network.As shown in Figure 1, in network upstream, one time server is set, under normal circumstances, time server receives the standard time from satellite in real time by the satellite reception module of self, if satellite reception module breaks down, the then synchronous hold mode of entry time, utilizes self onboard clock to carry out timing; In addition, the no matter whether synchronous hold mode of entry time, temporal information all can be carried in PTP protocol by clock server, is sent to each base station in downstream by transmission network in real time.Usually, a time server may correspond to multiple base station, and concrete quantity can be decided according to the actual requirements.
For mode shown in Fig. 1, can without the need to installing satellite reception module in a base station; Compared to the mode of installing satellite reception module in a base station, this mode can reduce and realizes cost.
But, also certain problem can be there is in actual applications in mode shown in Fig. 1, as: if the synchronous hold mode of time server entry time, natively can deviation be there is in the time that so base station receives compared to the standard time, if and afterwards sometime, for a certain reason as transmission network fault, base station can not continue to receive the temporal information from time server, so base station also can the synchronous hold mode of entry time, and utilize self onboard clock to carry out timing, and this onboard clock also can produce deviation; Like this, before base station service quit, the deviation of accumulation will be very large, thus may produce serious interference to other base station (such as the normal base station received from the standard time of satellite).
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of base station service quit method, can reduce interference.
Another object of the present invention is to provide a kind of base station, can interference be reduced.
Another object of the present invention is to provide a kind of time server, can reduce interference.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of base station service quit method, comprising:
A, when the synchronous hold mode of time server entry time, oneself state is informed to base station, and utilize self onboard clock to carry out timing, temporal information is sent to described base station in real time;
B, described base station real-time reception from the temporal information of described time server, when described temporal information cannot be received, the synchronous hold mode of entry time; Further, from the state notifying received from described time server, calculate the deviation delta T of current time relative to the standard time in real time, when described Δ T is greater than the threshold value preset, performs and move back clothes operation.
A kind of base station, comprising:
First processing unit, for receiving the notice of the synchronous hold mode of entry time from time server, sends to the second processing unit;
Described second processing unit, for the temporal information of real-time reception from described time server, when described temporal information cannot be received, control the synchronous hold mode of described base station entry time, and from receiving described notice, real-time calculating current time, relative to the deviation delta T of standard time, when described Δ T is greater than the threshold value preset, performs and moves back clothes operation.
A kind of time server, comprising:
Fourth processing unit, for when the synchronous hold mode of described time server entry time, notifies that the 5th processing unit performs self function;
Described 5th processing unit, for by the state notifying of described time server to base station, and utilize the onboard clock of described time server to carry out timing, temporal information sent to described base station in real time.
Visible, adopt technical scheme of the present invention, after knowing the synchronous hold mode of time server entry time, base station calculates the deviation of current time relative to the standard time in real time, once deviation is greater than the threshold value preset, then performs and moves back clothes operation, instead of as in prior art, only have after the duration of the synchronous hold mode of base station entry time reaches scheduled duration, could perform and move back clothes operation, thus reduce the interference that may produce other base station preferably; And scheme of the present invention implements simple and convenient, be convenient to popularize.
Accompanying drawing explanation
Fig. 1 is the existing mode schematic diagram being realized the time synchronized between base station by transmission network.
Fig. 2 is the flow chart of base station service quit embodiment of the method for the present invention.
Fig. 3 is the composition structural representation of base station embodiment of the present invention.
Fig. 4 is the composition structural representation of time server embodiment of the present invention.
Embodiment
For problems of the prior art, propose the base station service quit scheme after a kind of improvement in the present invention, can interference be reduced.
For make technical scheme of the present invention clearly, understand, to develop simultaneously embodiment referring to accompanying drawing, scheme of the present invention be described in further detail.
Fig. 2 is the flow chart of base station service quit embodiment of the method for the present invention.As shown in Figure 2, comprising:
Step 21: when the synchronous hold mode of time server entry time, oneself state is informed to base station, and utilize self onboard clock to carry out timing, temporal information is sent to base station in real time.
In this step, once the synchronous hold mode of time server entry time, then oneself state can be informed to base station, how notify not to be restricted; Further, according to existing processing mode, time server carries out timing by utilizing self onboard clock, and temporal information is sent to base station in real time.
In addition, when entering during synchronous hold mode, the time corresponding for self onboard clock also can keep grade to send to base station by time server.
In actual applications, can arrange 4 times maintenance grades, each time keeps the grade maintenance precision grade that correspondence one is different respectively, and clock keeps higher grade, and the maintenance precision grade of correspondence is also higher; Wherein, highest-ranking maintenance precision is that caesium clock keeps precision, secondly for rubidium clock keeps precision, afterwards for high stability crystal oscillator keeps precision, finally for common crystals keeps precision.
Step 22: base station real-time reception from the temporal information of time server, when temporal information cannot be received, the synchronous hold mode of entry time; Further, from the state notifying received from time server, calculate the deviation delta T of current time relative to the standard time in real time, when Δ T is greater than the threshold value preset, performs and move back clothes operation.
In this step, base station is according to the temporal information of existing mode real-time reception from time server, if a certain moment cannot receive described temporal information for a certain reason again, then the synchronous hold mode of entry time, namely utilizes self onboard clock to carry out timing.That is, before the synchronous hold mode of base station entry time, it utilizes the temporal information being received from time server to carry out time synchronized with other base station, after the synchronous hold mode of base station entry time, utilizes self onboard clock to come to carry out time synchronized with other base station.
In addition, from knowing the synchronous hold mode of time server entry time, namely from the state notifying received from time server, the different time that can preserve in advance according to self of base station keeps grade punctual accuracy corresponding respectively and time corresponding to the onboard clock of time server that receives to keep grade etc., calculates the deviation delta T of current time relative to the standard time in real time.
The concrete account form of Δ T can be:
1) if the synchronous hold mode of the non-entry time in base station, then Δ T=T × δ; Wherein, T represents that δ represents the punctual accuracy that the time received keeps grade corresponding from receiving the duration of time maintenance grade to current time;
2) if the synchronous hold mode of base station entry time, then Δ T=Δ T0+T2 × δ 2, Δ T0=T1 × δ 1; Wherein, T1 represents from receiving the duration of time maintenance grade to the synchronous hold mode of base station entry time, δ 1 represents the punctual accuracy that the time received keeps grade corresponding, T2 represents the duration from the synchronous hold mode of base station entry time to current time, and δ 2 represents the punctual accuracy that the time that the onboard clock of base station is corresponding keeps grade corresponding.
In actual applications, one can be pre-set in a base station and keep discriminant parameter α, initial condition, the value of α is 0, when after the state notifying that base station receives from time server, the value of α is set to 1, and when after the synchronous hold mode of base station self entry time, the value of α is set to 1 equally; Certainly, on the contrary also passable, and namely initial condition is set to 1.Like this, for the above-mentioned 2nd) plant situation, state when base station changes, after such as entering into time synchronized hold mode from the synchronous hold mode of non-temporal, determine that whether time server is prior to the synchronous hold mode of oneself entry time by inquiry α, if so, then on the basis of Δ T0, accumulate T2 × δ 2, thus obtain final Δ T.
Once the Δ T calculated is greater than the threshold value beta preset, then base station can perform and move back clothes operation.
Alternatively feasible implementation, in this step, after the synchronous hold mode of time server entry time is known in base station, the temporal information being received from time server directly can be utilized to carry out time synchronized with other base station not according to existing mode, but keep the grade time corresponding with self onboard clock to keep grade to compare the time being received from time server, if the time received keeps grade to keep grade higher than the time that self onboard clock is corresponding, then perform step 22, otherwise, the synchronous hold mode of direct entry time, and calculate Δ T in real time, when Δ T is greater than β, clothes operation is moved back in execution.
That is, if the maintenance precision grade of the onboard clock of time server is higher than the maintenance precision grade of base station self onboard clock, then base station utilizes the temporal information being received from time server to carry out time synchronized with other base station, otherwise, utilize self onboard clock to come to carry out time synchronized with other base station, thus ensure that base station can use the clock keeping precision grade relatively the highest.
In this case, base station can calculate Δ T in such a way: Δ T=T3 × δ 3; Wherein, T3 represents the duration from the synchronous hold mode of base station entry time to current time, and δ 3 represents the punctual accuracy that the time that the onboard clock of base station is corresponding keeps grade corresponding.
If time server reverts to normal condition, namely revert to the synchronous hold mode of non-temporal that can normally receive from the standard time of satellite, so time server meeting informing base station; Correspondingly, performing any instant moved back before clothes operation, if base station receives information normal time from time server, i.e. standard time information, then reset Δ T and above-mentioned α.
So far, the introduction about the inventive method embodiment is namely completed.
Based on above-mentioned introduction, Fig. 3 is the composition structural representation of base station embodiment of the present invention.As shown in Figure 3, comprising:
First processing unit 31, for receiving the notice of the synchronous hold mode of entry time from time server, sends to the second processing unit 32;
Second processing unit 32, for the temporal information of real-time reception from time server, when temporal information cannot be received, control the synchronous hold mode of base station entry time, and from receiving described notice, real-time calculating current time, relative to the deviation delta T of standard time, when Δ T is greater than the threshold value preset, performs and moves back clothes operation.
Wherein, the first processing unit 31 can be further used for, and the time received from time server keeps grade, sends to the second processing unit 32; The punctual accuracy that the different time keeps grade difference correspondence is preserved further in second processing unit 32;
If the synchronous hold mode of the non-entry time in base station, then the second processing unit 32 calculates Δ T=T × δ in real time; Wherein, T represents that δ represents the punctual accuracy that the time received keeps grade corresponding from receiving the duration of time maintenance grade to current time;
If the synchronous hold mode of base station entry time, then the second processing unit 32 calculates Δ T=Δ T0+T2 × δ 2, Δ T0=T1 × δ 1 in real time; Wherein, T1 represents from receiving the duration of time maintenance grade to the synchronous hold mode of base station entry time, δ 1 represents the punctual accuracy that the time received keeps grade corresponding, T2 represents the duration from the synchronous hold mode of base station entry time to current time, and δ 2 represents the punctual accuracy that the time that the onboard clock of base station is corresponding keeps grade corresponding.
In addition, also can comprise further in base station shown in Fig. 3: the 3rd processing unit 33; First processing unit 31 is further used for, and keeps grade to send to the 3rd processing unit 33 time received;
The time received keeps the grade time corresponding with the onboard clock of base station to keep grade to compare by the 3rd processing unit 33, if the time received keeps grade to keep grade higher than the time that the onboard clock of base station is corresponding, then notify that the second processing unit 32 performs self function, otherwise, the synchronous hold mode of direct entry time, and calculate Δ T=T3 × δ 3 in real time; Wherein, T3 represents the duration from the synchronous hold mode of base station entry time to current time, and δ 3 represents the punctual accuracy that the time that the onboard clock of base station is corresponding keeps grade corresponding, and when Δ T is greater than threshold value, clothes operation is moved back in execution.
Fig. 4 is the composition structural representation of time server embodiment of the present invention.As shown in Figure 4, comprising:
Fourth processing unit 41, for when the synchronous hold mode of time server entry time, notifies that the 5th processing unit 42 performs self function;
5th processing unit 42, for by the state notifying of time server to base station, and utilize the onboard clock of time server to carry out timing, temporal information sent to base station in real time.
Wherein, the 5th processing unit 42 also can be further used for, and keeps grade to send to base station the time corresponding for the onboard clock of time server.
The specific works flow process of Fig. 3 and 4 shown device embodiments please refer to the corresponding introduction in embodiment of the method shown in Fig. 2, repeats no more herein.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. a base station service quit method, is characterized in that, comprising:
A, when the synchronous hold mode of time server entry time, oneself state is informed to base station, and utilize self onboard clock to carry out timing, temporal information is sent to described base station in real time;
B, described base station real-time reception from the temporal information of described time server, when described temporal information cannot be received, the synchronous hold mode of entry time; Further, from the state notifying received from described time server, calculate the deviation △ T of current time relative to the standard time in real time, when described △ T is greater than the threshold value preset, performs and move back clothes operation.
2. method according to claim 1, is characterized in that, described steps A comprises further: when the synchronous hold mode of described time server entry time, keeps grade to send to described base station the time corresponding for self onboard clock;
Preserve the punctual accuracy that different time keeps grade corresponding respectively in described base station in advance, in described step B, base station calculates described △ T in real time and comprises:
If the synchronous hold mode of the non-entry time in described base station, then described △ T=T × δ; Wherein, described T represents that described δ represents the punctual accuracy that the time received keeps grade corresponding from receiving the duration of time maintenance grade to current time;
If the synchronous hold mode of described base station entry time, then described △ T=△ T0+T2 × δ 2, described △ T0=T1 × δ 1; Wherein, described T1 represents from receiving the duration of time maintenance grade to the synchronous hold mode of described base station entry time, described δ 1 represents the punctual accuracy that the time received keeps grade corresponding, described T2 represents the duration from the synchronous hold mode of described base station entry time to current time, and described δ 2 represents the punctual accuracy that the time that the onboard clock of described base station is corresponding keeps grade corresponding.
3. method according to claim 2, is characterized in that, before described step B, comprises further:
The time received keeps the grade time corresponding with self onboard clock to keep grade to compare by X, described base station, if the time received keeps grade to keep grade higher than the time that self onboard clock is corresponding, then perform step B, otherwise, perform step Y;
Y, the synchronous hold mode of the direct entry time in described base station, and calculate described △ T in real time, when described △ T is greater than described threshold value, performs and move back clothes operation.
4. method according to claim 3, is characterized in that, base station described in described step Y calculates described △ T in real time and comprises:
Described △ T=T3 × δ 3; Wherein, described T3 represents the duration from the synchronous hold mode of described base station entry time to current time, and described δ 3 represents the punctual accuracy that the time that the onboard clock of described base station is corresponding keeps grade corresponding.
5. the method according to claim 1,2,3 or 4, it is characterized in that, the method comprises further: if performing any instant moved back before clothes operation, described base station receives information normal time from described time server, then reset by described △ T.
6. a base station, is characterized in that, comprising:
First processing unit, for receiving the notice of the synchronous hold mode of time server entry time from time server, sends to the second processing unit;
Described second processing unit, for the temporal information of real-time reception from described time server, when described temporal information cannot be received, control the synchronous hold mode of described base station entry time, and from receiving described notice, real-time calculating current time, relative to the deviation △ T of standard time, when described △ T is greater than the threshold value preset, performs and moves back clothes operation.
7. base station according to claim 6, is characterized in that, described first processing unit is further used for, and the time received from described time server keeps grade, sends to described second processing unit; The punctual accuracy that the different time keeps grade difference correspondence is preserved further in described second processing unit;
If the synchronous hold mode of the non-entry time in described base station, then described second processing unit calculates △ T=T × δ in real time; Wherein, described T represents that described δ represents the punctual accuracy that the time received keeps grade corresponding from receiving the duration of time maintenance grade to current time;
If the synchronous hold mode of described base station entry time, then described second processing unit calculates △ T=△ T0+T2 × δ 2, described △ T0=T1 × δ 1 in real time; Wherein, described T1 represents from receiving the duration of time maintenance grade to the synchronous hold mode of described base station entry time, described δ 1 represents the punctual accuracy that the time received keeps grade corresponding, described T2 represents the duration from the synchronous hold mode of described base station entry time to current time, and described δ 2 represents the punctual accuracy that the time that the onboard clock of described base station is corresponding keeps grade corresponding.
8. base station according to claim 7, is characterized in that, described base station comprises further: the 3rd processing unit; Described first processing unit is further used for, and keeps grade to send to described 3rd processing unit the time received;
Described 3rd processing unit, grade is kept to compare for being kept the grade time corresponding with the onboard clock of described base station the time received, if the time received keeps grade to keep grade higher than the time that the onboard clock of described base station is corresponding, then notify that described second processing unit performs self function, otherwise, the synchronous hold mode of direct entry time, and calculate △ T=T3 × δ 3 in real time; Wherein, described T3 represents the duration from the synchronous hold mode of described base station entry time to current time, described δ 3 represents the punctual accuracy that the time that the onboard clock of described base station is corresponding keeps grade corresponding, and when described △ T is greater than described threshold value, clothes operation is moved back in execution.
9. a time server, is characterized in that, comprising:
Fourth processing unit, for when the synchronous hold mode of described time server entry time, notifies that the 5th processing unit performs self function;
Described 5th processing unit, for by the state notifying of described time server to base station, and utilize the onboard clock of described time server to carry out timing, temporal information is sent to described base station in real time, so that described base station is from receiving the state notifying of described time server, real-time calculating current time is relative to the deviation △ T of standard time, when described △ T is greater than the threshold value preset, clothes operation is moved back in execution, and real-time reception is from the temporal information of described time server, when described temporal information cannot be received, the synchronous hold mode of entry time.
10. time server according to claim 9, is characterized in that, described 5th processing unit is further used for, and keeps grade to send to described base station the time corresponding for the onboard clock of described time server.
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| CN1394004A (en) * | 2001-06-29 | 2003-01-29 | 深圳市中兴通讯股份有限公司上海第二研究所 | Method and device for choosing and controlling clock source of synchronous digital optical network |
| CN2790050Y (en) * | 2004-12-10 | 2006-06-21 | 上海欣泰通信技术有限公司 | ETS exchanger time synchronizer |
| CN101022306A (en) * | 2006-02-13 | 2007-08-22 | 鼎桥通信技术有限公司 | Inter base station synchronizing method in mobile communication system |
| CN201039198Y (en) * | 2006-09-18 | 2008-03-19 | 中兴通讯股份有限公司 | Network timing distribution system for Ethernet passive optical network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2871006B1 (en) * | 2004-05-28 | 2008-09-12 | Thales Sa | METHOD AND SYSTEM FOR DISTRIBUTED SYNCHRONIZATION |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1394004A (en) * | 2001-06-29 | 2003-01-29 | 深圳市中兴通讯股份有限公司上海第二研究所 | Method and device for choosing and controlling clock source of synchronous digital optical network |
| CN2790050Y (en) * | 2004-12-10 | 2006-06-21 | 上海欣泰通信技术有限公司 | ETS exchanger time synchronizer |
| CN101022306A (en) * | 2006-02-13 | 2007-08-22 | 鼎桥通信技术有限公司 | Inter base station synchronizing method in mobile communication system |
| CN201039198Y (en) * | 2006-09-18 | 2008-03-19 | 中兴通讯股份有限公司 | Network timing distribution system for Ethernet passive optical network |
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