CN102469484B - Base station out-of-service method, base station and time server - Google Patents

Abstract

The invention discloses a method for decommissioning a base station, including: A. When the time server enters the time synchronization maintenance state, it notifies the base station of its own state, and uses its own built-in clock for timing, and sends the time information to the base station in real time; B. The base station receives the time information from the time server in real time. When the time information cannot be received, it enters the time synchronization maintenance state, and, starting from receiving the status notification from the time server, calculates the deviation ΔT of the current time relative to the standard time in real time. When When ΔT is greater than the preset threshold, the decommissioning operation is performed. The invention simultaneously discloses a base station and a time server. The application of the method and device of the present invention can reduce interference.

Description

A base station decommissioning method, a base station and a time server

technical field

The present invention relates to mobile communication technology, in particular to a base station decommissioning method, a base station and a time server.

Background technique

Currently, mobile communication networks have higher and higher requirements for time synchronization. For example, for the code division multiple access (CDMA, Code Division Multiple Access) 2000 system and time division synchronous code division multiple access (TD-SCDMA, TimeDivision-Synchronous Code Division Multiple Access) in the third generation mobile communication (3G, 3rd Generation) network In the system, accurate time synchronization is required between the base stations, otherwise, there will be interference between the base stations, which will lead to problems such as abnormal business development.

In the prior art, satellite receiving modules such as Global Positioning System (GPS, Global Positioning System) are usually installed in each base station, and each base station receives the standard time from the satellite in real time through the satellite receiving module, thereby maintaining time synchronization between each other.

If the satellite receiving module fails and the standard time from the satellite cannot be received normally, then the base station will enter the time synchronization maintenance state and rely on its own built-in clock for timing. The built-in clock is usually a crystal clock, and the accuracy of the crystal clock is limited , after a period of time, there will be a deviation from the standard time. If the deviation is large, it will cause interference to the surrounding base stations that normally receive the standard time from the satellite. In order to avoid interference, when the duration of entering the time synchronization maintenance state reaches the predetermined duration, the base station will automatically shut down and exit the service, referred to as decommissioning.

In addition, with the emergence of the Precision Time Protocol (PTP, Precision Time Protocol), it is gradually possible to achieve time synchronization between base stations through the transmission network, which provides another way to achieve time synchronization between base stations. Which one is used specifically? The method can be determined according to actual needs.

FIG. 1 is a schematic diagram of an existing method for implementing time synchronization between base stations through a transmission network. As shown in Figure 1, a time server is set in the upstream of the network. Under normal circumstances, the time server receives the standard time from the satellite in real time through its own satellite receiving module. If the satellite receiving module breaks down, it will enter the time synchronization maintenance state. It has a built-in clock for timing; in addition, no matter whether it is in the time synchronization state or not, the clock server will carry the time information in the PTP protocol and send it to the downstream base stations in real time through the transmission network. Usually, one time server can correspond to multiple base stations, and the specific number can be determined according to actual needs.

For the method shown in FIG. 1 , there is no need to install a satellite receiving module in the base station; compared with the method of installing a satellite receiving module in the base station, this method can reduce the implementation cost.

However, the method shown in Figure 1 also has certain problems in practical applications, such as: if the time server enters the time synchronization maintenance state, then the time received by the base station will originally deviate from the standard time, and if the subsequent At a certain moment, due to some reasons such as transmission network failure, the base station cannot continue to receive time information from the time server, then the base station will also enter the time synchronization maintenance state, and use its own built-in clock for timing, and the built-in clock will also In this way, before the base station decommissions, the accumulated deviation will be very large, which may cause serious interference to other base stations (such as the base station that normally receives the standard time from the satellite).

Contents of the invention

In view of this, the main purpose of the present invention is to provide a base station decommissioning method that can reduce interference.

Another object of the present invention is to provide a base station capable of reducing interference.

Another object of the present invention is to provide a time server capable of reducing interference.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for decommissioning a base station, comprising:

A. When the time server enters the time synchronization and maintenance state, it notifies the base station of its own state, and uses its own built-in clock for timing, and sends the time information to the base station in real time;

B. The base station receives the time information from the time server in real time. When the time information cannot be received, it enters the time synchronization maintenance state; and, starting from receiving the status notification from the time server, calculates the current time in real time The time deviation ΔT relative to the standard time, when the ΔT is greater than a preset threshold, the decommissioning operation is performed.

A base station, comprising:

The first processing unit is configured to receive a notification from the time server to enter the time synchronization maintenance state, and send it to the second processing unit;

The second processing unit is configured to receive the time information from the time server in real time, and when the time information cannot be received, control the base station to enter the time synchronization maintenance state, and start from receiving the notification, real-time A deviation ΔT of the current time relative to the standard time is calculated, and when the ΔT is greater than a preset threshold, a decommissioning operation is performed.

A time server comprising:

The fourth processing unit is configured to notify the fifth processing unit to perform its own function when the time server enters the time synchronization maintenance state;

The fifth processing unit is configured to notify the base station of the state of the time server, and use the built-in clock of the time server to keep time, and send time information to the base station in real time.

It can be seen that, with the technical solution of the present invention, after learning that the time server has entered the time synchronization maintenance state, the base station calculates the deviation of the current time relative to the standard time in real time. As in the prior art, only when the base station enters the time synchronization maintenance state for a predetermined period of time, the decommissioning operation can be performed, thereby better reducing the interference that may be caused to other base stations; moreover, the solution of the present invention is implemented Simple and convenient, easy to popularize.

Description of drawings

FIG. 1 is a schematic diagram of an existing method for implementing time synchronization between base stations through a transmission network.

Fig. 2 is a flowchart of an embodiment of a method for decommissioning a base station according to the present invention.

FIG. 3 is a schematic diagram of the composition and structure of the base station embodiment of the present invention.

FIG. 4 is a schematic diagram of the composition and structure of the time server embodiment of the present invention.

Detailed ways

Aiming at the problems existing in the prior art, an improved base station decommissioning solution is proposed in the present invention, which can reduce interference.

In order to make the technical solution of the present invention clearer and clearer, the solution of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

Fig. 2 is a flowchart of an embodiment of a method for decommissioning a base station according to the present invention. As shown in Figure 2, including:

Step 21: When the time server enters the state of keeping time synchronization, it notifies the base station of its own state, uses its built-in clock for timing, and sends the time information to the base station in real time.

In this step, once the time server enters the time synchronization maintenance state, it will notify the base station of its own state, and there is no limit on how to notify; and, according to the existing processing method, the time server will use its own built-in clock for timing, and the time information will be real-time sent to the base station.

In addition, when entering the state of keeping time synchronization, the time server can also send the time keeping level corresponding to its built-in clock to the base station.

In practical applications, four time holding levels can be set, and each time holding level corresponds to a different holding accuracy level. The higher the clock holding level, the higher the corresponding holding accuracy level; among them, the highest level of holding accuracy is Cesium clocks maintain accuracy, followed by rubidium clocks, followed by high-stable crystal oscillators, and finally common crystal oscillators.

Step 22: The base station receives the time information from the time server in real time. When the time information cannot be received, it enters the time synchronization maintenance state; and, starting from receiving the status notification from the time server, calculates the deviation of the current time relative to the standard time in real time ΔT, when ΔT is greater than the preset threshold, the decommissioning operation is performed.

In this step, the base station receives the time information from the time server in real time according to the existing method. If the time information can no longer be received for some reason at a certain moment, it will enter the time synchronization maintenance state, that is, use its own built-in clock for timing . That is to say, before the base station enters the time synchronization maintenance state, it uses the time information received from the time server to perform time synchronization with other base stations, and after the base station enters the time synchronization maintenance state, it uses its own built-in clock to perform time synchronization with other base stations .

In addition, starting from knowing that the time server enters the time synchronization maintenance state, that is, from receiving the status notification from the time server, the base station can respectively correspond to the punctuality accuracy of the different time maintenance levels stored in advance by itself and the received time server The time maintenance level corresponding to the built-in clock, etc., calculates the deviation ΔT of the current time relative to the standard time in real time.

The specific calculation method of ΔT can be:

1) If the base station does not enter the time synchronization maintenance state, then ΔT=T×δ; wherein, T represents the duration from the received time maintenance level to the current time, and δ represents the punctuality accuracy corresponding to the received time maintenance level;

2) If the base station enters the time synchronization maintenance state, then ΔT=ΔT0+T2×δ2, ΔT0=T1×δ1; wherein, T1 represents the duration from receiving the time maintenance level to the base station entering the time synchronization maintenance state, and δ1 represents the received The punctuality accuracy corresponding to the time keeping level, T2 indicates the time period from the base station entering the time synchronization maintaining state to the current time, and δ2 indicates the punctuality accuracy corresponding to the time keeping level corresponding to the built-in clock of the base station.

In practical applications, a maintenance discrimination parameter α can be preset in the base station. In the initial state, the value of α is 0. When the base station receives the status notification from the time server, the value of α is set to 1. When the base station After entering the time synchronization state, the value of α is also set to 1; of course, the opposite is also possible, that is, the initial state is set to 1. In this way, for the above 2) case, when the state of the base station changes, for example, after entering the time synchronization maintenance state from the non-time synchronization maintenance state, it can be determined whether the time server has entered the time synchronization maintenance state before itself by querying α , if yes, accumulate T2×δ2 on the basis of ΔT0 to get the final ΔT.

Once the calculated ΔT is greater than the preset threshold β, the base station can perform a decommissioning operation.

As another feasible implementation, in this step, when the base station learns that the time server has entered the time synchronization maintenance state, it may not directly use the time information received from the time server to perform time synchronization with other base stations according to the existing method, but will The time keeping level received from the time server is compared with the time keeping level corresponding to its own built-in clock, if the received time keeping level is higher than the time keeping level corresponding to its own built-in clock, then perform step 22, otherwise, directly enter the time synchronization keeping State, and calculate ΔT in real time, when ΔT is greater than β, perform decommissioning operation.

That is to say, if the maintenance accuracy level of the built-in clock of the time server is higher than the maintenance accuracy level of the base station's own built-in clock, the base station uses the time information received from the time server to perform time synchronization with other base stations, otherwise, uses its own built-in clock to Time synchronization with other base stations, so as to ensure that the base station can use the clock with the highest level of accuracy.

In this case, the base station can calculate ΔT in the following manner: ΔT=T3×δ3; wherein, T3 represents the time period from the base station entering the time synchronization maintenance state to the current time, and δ3 represents the time corresponding to the time keeping level corresponding to the built-in clock of the base station. Punctual accuracy.

If the time server returns to the normal state, that is, it returns to the non-time synchronization holding state that can normally receive the standard time from the satellite, then the time server will notify the base station; correspondingly, at any time before the decommissioning operation, if the base station receives When the normal time information from the time server, ie the standard time information, is received, ΔT and the above α are cleared to zero.

So far, the introduction about the method embodiment of the present invention is completed.

Based on the above introduction, FIG. 3 is a schematic diagram of a structure of a base station embodiment of the present invention. As shown in Figure 3, including:

The first processing unit 31 is configured to receive a notification of entering the time synchronization maintenance state from the time server, and send it to the second processing unit 32;

The second processing unit 32 is used to receive time information from the time server in real time, and when the time information cannot be received, control the base station to enter the time synchronization maintenance state, and start from receiving the notification to calculate the current time relative to the standard time in real time The deviation ΔT, when ΔT is greater than the preset threshold, the decommissioning operation is performed.

Wherein, the first processing unit 31 can be further used to receive the time keeping level from the time server and send it to the second processing unit 32; the second processing unit 32 further preserves the punctual accuracy corresponding to different time keeping levels ;

If the base station does not enter the time synchronization maintenance state, the second processing unit 32 calculates ΔT=T×δ in real time; wherein, T represents the duration from the received time maintenance level to the current time, and δ represents the time keeping level corresponding to the received time maintenance level time accuracy;

If the base station enters the time synchronization maintenance state, the second processing unit 32 calculates in real time ΔT=ΔT0+T2×δ2, ΔT0=T1×δ1; wherein, T1 represents the duration from receiving the time maintenance level to the base station entering the time synchronization maintenance state, δ1 indicates the punctuality accuracy corresponding to the received time keeping level, T2 indicates the time period from the base station entering the time synchronization maintaining state to the current time, and δ2 indicates the punctuality accuracy corresponding to the time keeping level corresponding to the built-in clock of the base station.

In addition, the base station shown in FIG. 3 may further include: a third processing unit 33; the first processing unit 31 is further configured to send the received time keeping level to the third processing unit 33;

The third processing unit 33 compares the time keeping level received with the time keeping level corresponding to the built-in clock of the base station, and if the time keeping level received is higher than the time keeping level corresponding to the built-in clock of the base station, then notify the second processing unit 32 to execute its own function, otherwise, directly enter the time synchronization holding state, and calculate ΔT=T3×δ3 in real time; wherein, T3 represents the time length from the base station entering the time synchronization holding state to the current time, and δ3 represents the time holding time corresponding to the built-in clock of the base station The punctuality accuracy corresponding to the level. When ΔT is greater than the threshold, the decommissioning operation will be performed.

FIG. 4 is a schematic diagram of the composition and structure of the time server embodiment of the present invention. As shown in Figure 4, including:

The fourth processing unit 41 is configured to notify the fifth processing unit 42 to perform its own function when the time server enters the time synchronization maintenance state;

The fifth processing unit 42 is configured to notify the base station of the state of the time server, and use the built-in clock of the time server to keep time, and send the time information to the base station in real time.

Wherein, the fifth processing unit 42 may be further configured to send the time keeping level corresponding to the built-in clock of the time server to the base station.

For the specific work flow of the device embodiment shown in FIGS. 3 and 4 , please refer to the corresponding introduction in the method embodiment shown in FIG. 2 , which will not be repeated here.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

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.