WO2014179924A1

WO2014179924A1 - Method and apparatus for coordinating synchronization between base stations, and base station

Info

Publication number: WO2014179924A1
Application number: PCT/CN2013/075199
Authority: WO
Inventors: 郑娟; 马莎; 李强
Original assignee: 华为技术有限公司
Priority date: 2013-05-06
Filing date: 2013-05-06
Publication date: 2014-11-13
Also published as: CN104272823B; CN104272823A

Abstract

A method and an apparatus for coordinating synchronization between base stations, and a base station. The method comprises: a target base station measuring a signal transmitted by multiple base stations at one or more frequency channel numbers; the target base station determining a source base station according to a signal strength of the signal; the target base station obtaining an influencing factor of the source base station and/or an influencing factor of a higher synchronization level base station of the source base station; and the target base station using a base station with the influencing factor reaching a preset range as a synchronization source base station, and keeping synchronization with the synchronization source base station. By using the embodiments of the present invention, the problem of coordinating synchronization between base stations is solved, thereby reducing the complexity of system operation and decreasing the influence on a served user, and improving the satisfaction degree of the user.

Description

Method, device and base station for synchronous coordination between base stations

TECHNICAL FIELD The present invention relates to communication systems, and in particular, to a method, an apparatus, and a base station for synchronization and coordination between base stations. Background technique

With the widespread use of Time Division Duplex (TDD) technology, devices from multiple operators will coexist in the same geographical area. Especially in hot spots, the equipment of many operators will be dense. At this time, if different base stations of multiple operators use different frequency ranges in the same frequency band of TDD, when the uplink and downlink are not synchronized between the two base stations, the base stations will interfere with each other and cannot work normally, causing The performance of the system deteriorates, so that operators cannot obtain satisfactory frequency band usage.

In order to solve the problem of mutual interference between the unsynchronized base stations, in the prior art, the interception technology can be adopted between different operator base stations, that is, when a certain operator base station is deployed, the base station first uses the appropriate channel bandwidth (for example,

20MHz) to scan all channels in this frequency band to obtain information about the same carrier and other different carrier base stations already deployed in this geographical area, when receiving multiple base stations at one frequency point or multiple frequency points When transmitting a signal, select the synchronization information of the strongest base station to set its own synchronization information. However, when the newly deployed base station detects the transmission signals of multiple base stations at the same time, if the signal strength is the strongest as the synchronization reference signal of the newly deployed base station, the base station participating in the synchronization adjustment due to the introduction of the newly deployed base station will be caused. (The number of base stations that need to adjust their own synchronization information by detecting the information of the newly deployed base station) is large, which affects the user experience of the service and increases the complexity of the system operation.

Therefore, how to perform synchronization adjustment between interfering base stations is a technical problem to be solved. SUMMARY OF THE INVENTION In the embodiments of the present invention, a method, a device, and a base station for synchronization and coordination between base stations are provided to solve the problem of synchronization adjustment between interfering base stations.

In order to solve the above technical problem, the embodiment of the present invention discloses the following technical solutions:

The first aspect provides a method for synchronous coordination between base stations, where the method includes:

The target base station detects signals transmitted by a plurality of base stations on one frequency point or multiple frequency points;

Determining, by the target base station, a source base station according to a signal strength of the signal; Obtaining, by the target base station, an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station;

The target base station uses a base station whose impact factor reaches a preset range as a synchronization source base station, and keeps synchronization with the synchronization source base station.

In a first possible implementation manner of the first aspect, the impact factor is obtained according to at least one of the following: a synchronization accuracy of the source base station, a number of base stations using the synchronization information of the source base station as a synchronization adjustment reference, and a source The synchronization information of the base station serves as the synchronization accuracy of the base station to which the synchronization adjustment is referenced.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the method further includes:

After the synchronization, the target base station sends synchronization information to the source base station other than the synchronization source base station in the source base station, so that the source base station other than the synchronization source base station adjusts its own synchronization information.

In conjunction with the first aspect or the first or second possible implementation of the first aspect, in a third possible implementation manner, the sent synchronization information includes: an impact factor of the target base station.

With reference to the first aspect or the first or second or the third possible implementation manner of the first aspect, in a fourth possible implementation, the method further includes: after the synchronization, the target base station is The synchronization source base station feeds back synchronization information.

With reference to the first aspect or the first or second or the third or the fourth possible implementation manner of the first aspect, in a fifth possible implementation, the target base station reaches the impact factor Setting a base station as a synchronization source base station and maintaining synchronization with the synchronization source base station includes:

The target base station uses a base station whose impact factor is greater than a predetermined value as a synchronization source base station, and keeps synchronization with the synchronization source base station.

With reference to the first aspect or the first or second or third or fourth or fifth possible implementation manner of the first aspect, in a sixth possible implementation, the target base station acquires the Source base station impact factor and

The impact factor of the base station of the upper layer synchronization level of the source base station includes:

The target base station receives the first signaling, where the first signaling includes at least one of: radio resource control broadcast signaling, radio resource control proprietary signaling, media access control signaling, and physical layer signaling, Obtaining, in the first signaling, an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station; or

The target base station acquires an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station by means of a blind detection. The second aspect provides an apparatus for synchronous coordination between base stations, where the apparatus includes: a detecting unit, configured to detect signals transmitted by multiple base stations at one frequency point or multiple frequency points;

a determining unit, configured to determine a source base station according to a signal strength of the signal;

An acquiring unit, configured to acquire an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station;

And a synchronization unit, configured to use the base station that reaches the preset range as the synchronization source base station, and keep synchronization with the synchronization source base station.

In a first possible implementation manner of the second aspect, the impact factor acquired by the acquiring unit is obtained according to at least one of the following: synchronization precision of the source base station, using synchronization information of the source base station as a synchronization adjustment reference The number of base stations and the synchronization information of the source base station are used as synchronization accuracy of the base station for synchronization adjustment reference.

With reference to the second aspect, or the first possible implementation of the second aspect, in a second possible implementation, the apparatus further includes:

a first sending unit, configured to send synchronization information to a source base station other than the synchronization source base station in the source base station after synchronization, so that the source base station except the synchronization source base station adjusts its synchronization information. .

With reference to the second aspect or the first or the second possible implementation manner of the second aspect, in a third possible implementation, the synchronization information sent by the first sending unit includes: an impact factor of the target base station .

With reference to the second aspect or the first or second or third possible implementation manner of the second aspect, in a fourth possible implementation, the apparatus further includes: a second sending unit, configured to perform synchronization After that, the synchronization information is fed back to the synchronization source base station.

With reference to the second aspect or the first or second or third or fourth possible implementation of the second aspect, in a fifth possible implementation, the synchronization unit is specifically configured to use an impact factor A base station larger than a predetermined value serves as a synchronization source base station and is synchronized with the synchronization source base station.

With reference to the second aspect or the first or second or the third or the fourth or the fifth possible implementation manner of the second aspect, in a sixth possible implementation, the acquiring unit includes:

a first acquiring unit, configured to receive first signaling, where the first signaling includes at least one of: radio resource control broadcast signaling, radio resource control proprietary signaling, media access control signaling, and physical layer signaling. And obtaining, by the first signaling, an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station; or

And a second acquiring unit, configured to acquire, by means of a blind detection, an impact factor of the base station of the upper synchronization level of the source base station. The third aspect provides a base station, including:

a processor, configured to detect a signal transmitted by a plurality of base stations at one frequency point or multiple frequency points; and determine a source base station according to a signal strength of the signal;

a transceiver, configured to acquire an impact factor of the source base station and/or an impact factor of a base station of a level synchronization level of the source base station;

The processor is further configured to use, by the base station, the impact factor to reach a preset range as a synchronization source base station; and the transceiver is further configured to maintain synchronization with the synchronization source base station.

In a first possible implementation manner of the third aspect, the impact factor obtained by the transceiver is obtained according to at least one of the following: a synchronization accuracy of the source base station, and synchronization information of the source base station as a synchronization adjustment reference. The number of base stations and the synchronization information of the source base station are used as synchronization accuracy of the base station for synchronization adjustment reference.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation, the transceiver is further configured to: after the synchronization, remove the synchronization source from the source base station The source base station outside the base station transmits synchronization information, so that the source base station other than the synchronization source base station adjusts its own synchronization information.

With the third aspect or the first or second possible implementation manner of the third aspect, in a third possible implementation, the transceiver is further configured to: after the synchronization, provide feedback to the synchronization source base station Synchronization information.

With reference to the third aspect or the first or second or the third possible implementation manner of the third aspect, in a fourth possible implementation, the processor, the one of the impact factors reaches a preset range The base station as the synchronization source base station specifically includes: using, as the synchronization source base station, a base station whose impact factor is greater than a predetermined value.

With reference to the third aspect or the first or second or the third or the fourth possible implementation manner of the third aspect, in a fifth possible implementation, the transceiver is specifically configured to receive the first Signaling, the first signaling includes at least one of: radio resource control broadcast signaling, radio resource control proprietary signaling, media access control signaling, and physical layer signaling, from the first signaling Obtaining an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station; or an impact factor of a base station for acquiring an upper layer synchronization level of the source base station by blind detection.

According to the foregoing technical solution, in the embodiment of the present invention, when the target base station detects multiple source base stations at the same time, the impact factors of the source base station and the upper base station thereof may be further acquired, and an impact factor within a preset range is reached. The base station establishes synchronization, which reduces the base station participating in the synchronization adjustment in the system, thereby reducing the complexity of the system operation and reducing the impact on the service users, and improving the user satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following embodiments will be BRIEF DESCRIPTION OF THE DRAWINGS The drawings, which are used in the technical description, are briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art will not be creatively labored. Further drawings can also be obtained from these figures.

FIG. 1 is a flowchart of a method for synchronization and coordination between base stations according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an apparatus for synchronization and coordination between base stations according to an embodiment of the present invention; FIG. 3 is another schematic structural diagram of an apparatus for synchronization and coordination between base stations according to an embodiment of the present invention; A schematic structural diagram of a base station provided by the example. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. The following embodiments may be combined with each other without contradiction. In this embodiment, for convenience of description, a base station that provides synchronization information for other base stations is referred to as a source base station; and a base station that uses a signal received from other base stations as a synchronization adjustment is referred to as a target base station. Obviously, a certain base station can be either a source base station or a target base station. FIG. 1 is a flowchart of a method for synchronization and coordination between base stations according to an embodiment of the present invention; in this embodiment, each base station stores a flag, which is used to indicate an impact factor during synchronization. When the target base station detects several interference sources (ie, the interfering base station, which may also be referred to as a source base station), the impact factor of the interfering base station may be further read, and the timing information of the interfering base station with high impact factor is adjusted. Thereby achieving synchronization with interfering base stations with high impact factors. The method includes:

Step 101: The target base station detects signals transmitted by multiple base stations at one frequency point or multiple frequency points. In this step, the process of detecting, the target base station may be a newly deployed base station, for example, the newly deployed base station is deployed after deployment. The initial synchronization detection may be synchronous detection before the serving user equipment, and the target base station may also be a deployed base station, for example, the deployed base station restarts synchronization detection after the out-of-synchronization or the deployed base station performs in the process of serving the user equipment. Synchronous detection. Of course, other situations are also possible, and the embodiment is not limited. This embodiment takes a newly deployed target base station as an example.

The signal detected by the base station is a well-known signal between the base stations, and may be a signal carried by the existing synchronization channel, where the signal may be at least one of the following: Primary Synchronization Signal (PSS) Synchronization Signal (SSS, Secondary Synchronization Signal) Common Reference Signal (CRS), Channel State Information Reference Signal (CSI-RS, Chanel State Information Reference Signal), Single Frequency Network Multimedia Broadcast Multicast Service MBSFN RSCMBSFN RS, Multimedia Broadcast multicast service Single Frequency Network Reference Signal ) Other reference signals that can be learned by the target base station.

In this step, one frequency point and multiple frequency points may be predefined, because each base station in the system has a fixed operating frequency point, and the information of the frequency point can be known by other base stations; or The newly deployed base station (ie, the target base station) is directly obtained by blind detection, for example, scanning each frequency point at a fixed frequency interval, and detecting signals transmitted by each base station.

Step 102: The target base station determines a source base station according to a signal strength of the signal.

A determining process is: the target base station first calculates the signal strength of the signal; then, comparing the signal strength of the signal with a preset threshold value, and correspondingly the signal strength exceeding the threshold value The base station is determined to be the source base station.

That is to say, in this embodiment, the newly deployed target base station may perform correlation operation on the received signal and the local sequence to obtain the signal strength of the received signal; of course, the detected signal may also be subjected to autocorrelation operation. To get the signal strength of the received signal.

In this embodiment, the newly deployed target base station may set an energy detection threshold value, and compare the calculated signal strength with the threshold value. If the calculated signal strength exceeds the threshold value, the transmission may be considered as the emission. The base station of this signal will interfere with the newly deployed target base station, and the base station transmitting the signal can be regarded as the source of interference, that is, the source base station. Here, according to the set energy detection threshold value, the newly deployed target base station may detect one or more source base stations.

Step 103: The target base station acquires an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station;

In this embodiment, the impact factors of the source base station are obtained, and the impact factors of the source base stations of the upper base synchronization level of the source base station are respectively obtained. For example, the broadcast signaling and the wireless control may be performed by using the radio resources. The resource control proprietary signaling, the medium access control signaling, or the physical layer signaling acquires an impact factor of the source base station, or acquires an impact factor of a base station of any upper synchronization level of the source base station; The way to get the impact factor. Further, for example, a synchronization channel (SCH, Synchronization Channel), a physical information channel (SIB, System Information Block), and a paging in an existing Long Term Evolution (LTE) system can be used. Obtaining an impact factor of the source base station by using a channel or a downlink physical layer control channel, or acquiring any of the source base stations The impact factor of the base station of the layer synchronization level.

In this embodiment, the impact factor indicates the impact of the source base station (ie, the interference source) during the synchronization process, the impact factor of each base station and the synchronization accuracy of the base station, and the synchronization information of the base station is used as the synchronization adjustment reference. The number of base stations and the synchronization accuracy factor of the base station using the synchronization information of the base station as a synchronization adjustment reference are related. Preferably, the impact factor is a function of at least one of: a synchronization accuracy of the source base station, a number of base stations that use the synchronization information of the source base station as a synchronization adjustment reference, and a base station that uses the synchronization information of the source base station as a synchronization adjustment reference. Synchronization accuracy. Optionally, the impact factor is obtained according to the synchronization precision of the source base station and at least one of the following: the synchronization information of the source base station is used as the synchronization adjustment reference base number, and the synchronization information of the source base station is used as the synchronization adjustment reference. The synchronization accuracy of the base station, for example, may be a function of the above parameters. The higher the synchronization accuracy, the greater the number of base stations with the synchronization information of the base station as the synchronization adjustment reference, and the greater the influence factor of the base station. For example, the influence factor of the source base station A can be expressed as a + b * _SU m (with A as the influence factor of the next-level base station of the source base station). The a can be expressed as the relative synchronization precision of the source base station A, for example, a can be 1, b*sum (with A as the influence factor of the next-level base station of the source base station), and the source base station A is used as the synchronization timing reference. The sum of the impact factors of all target base stations, specifically, b represents the relative synchronization accuracy of the target base station B (which can be regarded as the next-level base station of the source base station A) with the source base station A as the synchronization timing reference, for example, b can be 0.5. Sum (the next level base station impact factor) represents the sum of the impact factors of all target base stations B. The target base station B here may be one or more. In addition, the relative synchronization accuracy of the different target base stations B with the source base station A as the synchronization timing reference may also be different. In this case, the impact factor may also be a+sum (b'*lower base station impact factor). Optionally, when no other base station uses the source base station A as the synchronous timing reference base station, the sum of the impact factors of the next-level base station in the above formula may be 0, that is, b* _SU m (with A as the next level of the source base station) The impact factor of the base station is equal to zero. When the target base station obtains the impact factor by blind detection, the impact factor may also correspond to the sequence one by one, and the sequence may be a sequence with good autocorrelation property and low cross-correlation property, such as constant envelope zero. Autocorrelation (CAZAC, Constant Amplitude Zero Auto Correlation) sequence. The target base station may perform a local correlation operation with the detected sequence using the locally saved sequence to determine the impact factor corresponding to the detected sequence.

In this embodiment, the source base station A needs to know the influence factors of the other target base stations with the source base station A as the synchronization timing reference, so that the source base station A updates the influence factor of the source base station A. Similarly, the target base station may notify the source base station of the impact factor of the target base station by radio resource control broadcast signaling, radio resource control proprietary signaling, media access control signaling, or physical layer signaling.

In the above embodiment, the synchronization accuracy of the base station may be represented by a synchronization level. For example, the smaller the synchronization level, the higher the synchronization accuracy; or the larger the synchronization level, the higher the synchronization accuracy. For example, through the Global Positioning System GPS (Global Positioning System) The base station (such as base station 1) that acquires synchronization information can consider that the synchronization accuracy is the highest, for example, it can be represented by synchronization level 0, and the base station (such as base station 2) that acquires synchronization information through the base station 1 can consider the synchronization accuracy. High, for example, can be represented by synchronization level 1, and the base station (e.g., base station 3) that acquires synchronization information by the base station 2 can consider the synchronization accuracy to be second highest, for example, can be represented by synchronization level 2, and so on.

That is to say, in this embodiment, the synchronization accuracy of the impact factor and the base station, the number of base stations using the synchronization information of the base station as the synchronization adjustment reference, and the synchronization accuracy factor of the base station using the synchronization information of the base station as the synchronization adjustment reference are related to .

In addition, the impact factor may also be obtained according to the synchronization precision of the source base station and at least one of the following: the base station using the synchronization information of the source base station as the synchronization adjustment reference, and the base station using the synchronization information of the source base station as the synchronization adjustment reference base station. Synchronization accuracy, this feature is particularly suitable for scenarios where the target base station directly acquires the impact factor of the source base station.

In addition, the case where the impact factor of the base station of any upper layer synchronization level of the source base station is obtained, the source base station may carry the influence factor of the base station of any upper layer synchronization level of the source base station, so that the target base station can pass The source base station acquires an impact factor of a base station of any upper synchronization level of the source base station. Similarly, the source base station may acquire an upper layer synchronization level or any upper layer synchronization of the source base station by using radio resource control broadcast signaling, radio resource control proprietary signaling, media access control signaling, or physical layer signaling. The impact factor of the level of the base station. Here, the base station of the upper layer synchronization level of the source base station refers to a base station that provides synchronization information for the source base station. For example, base station A provides synchronization information for base station B, and base station B provides synchronization information for base station C. Then, base station B can be regarded as the source base station of base station C, and base station C can be regarded as the target base station of base station B; base station A can be regarded as base station B. The source base station, the base station B can be regarded as the target base station of the base station A. That is to say, in this example, the base station B is a target base station that acquires synchronization through the base station A, and is a source base station that provides synchronization for the base station C. In this example, the base station A can be regarded as the source base station of the upper layer synchronization level of the base station B, and the base station B can be regarded as the base station of the upper layer synchronization level of the base station C, and the base station A or the B can be regarded as any upper layer synchronization level of the base station C. Base station.

For example, the base station A provides the synchronization adjustment reference information for the base station B, and the base station B provides the synchronization adjustment reference information for the base station C. On the other hand, the base station A1 provides the synchronization adjustment reference information for the base station B1, and the base station B1 provides the synchronization adjustment reference information for the base station C1. The newly deployed base station D (ie, the target base station) simultaneously detects that the base stations C and C1 are the interference source base stations, and at this time, the base station D can further read the influence factor of the base station B/B1 carried by the base station C/C1, and can also read the base station. The influence factor of the base station A/A1 carried by the C/C1, and the comparison of the influence factors of the base stations of the same synchronization level (for example, comparing the influence factors of the base station B and the base station B1), after which the base station D selects the base station B with a high influence factor (assuming the base station) The influence factor of B is higher than the influence factor of base station B1), and the base is further determined. The corresponding interference source base station in the synchronization system, that is, the base station C, adjusts its own synchronization information according to the synchronization information of the base station C.

Obviously, in the above process, each layer of the synchronization level base station needs to carry the influence factor of the upper layer synchronization level base station, so that the newly deployed target base station can acquire the impact factor, thereby determining the source base station for timing adjustment. Optionally, the manner in which the next synchronization level base station (or the target base station) acquires the impact factor of the upper synchronization level base station is the same as the acquisition manner in the foregoing embodiment. For example, the radio resource control broadcast signaling and the radio resource control proprietary information may be used. Obtained by means of media access control signaling or physical layer signaling, and details are not described herein again.

Step 104: The target base station uses a base station whose impact factor reaches a preset range as a synchronization source base station, and keeps synchronization with the synchronization source base station.

Specifically, the target base station uses, as a synchronization source base station, a base station whose impact factor is greater than a predetermined value, and keeps synchronization with the synchronization source base station.

The preset range may be an interval set according to experience, may include the highest impact factor, and may include a higher impact factor.

When the impact factor reaches a plurality of base stations in the preset range, the newly deployed target base station may maintain synchronization with any one of the base stations within the preset range according to the impact factor, for example, the pre-determination may be achieved according to the impact factor. Set the time when any one of the base stations in the range reaches the newly deployed target base station, and adjust its own timing information so that the target base station and the source base station can simultaneously transmit signals.

In this embodiment, the base station whose impact factor reaches the preset range may be the source base station, or may be the base station of the upper layer synchronization level of the source base station.

In the embodiment of the present invention, when the target base station detects multiple source base stations at the same time, the impact factors of the source base station and the upper base station thereof may be further acquired, and the synchronization with the base station that reaches an impact factor within the preset range is established, and the synchronization is reduced. The base stations participating in the synchronous adjustment in the system also reduce the complexity of the system operation and reduce the impact on the service users, thereby improving user satisfaction.

Optionally, in another embodiment, in order to trigger the other source base station to perform synchronization information adjustment, the embodiment may further include: at the target base station and reaching the preset, based on the foregoing embodiment. After the source base station (ie, the synchronization source base station) of the range of one of the impact factors keeps synchronizing, the target base station sends synchronization information to the source base station other than the synchronization source base station in the source base station, so as to be used in addition to the synchronization source base station. The external source base station adjusts its own synchronization information.

That is to say, the target base station can quickly initiate the synchronization adjustment process for other interference sources (source base stations) by detecting the interference source (ie, the source base station) and the notification of the synchronization adjustment information.

Optionally, in another embodiment, the method may further include: after the synchronization, the target base station is located The synchronization source base station feeds back synchronization information, and the synchronization information may include an impact factor after the synchronization of the target base station, but is not limited thereto, and may include other information, which is not limited in this embodiment.

That is, each newly deployed target base station may obtain feedback information of the source base station to which the synchronization information is obtained after acquiring the synchronization, so that the source base station can learn the existence of the base station as the synchronization adjustment, and then calculate the source base station. Impact factors can be considered. In this embodiment, the feedback information may include an impact factor of the target base station, and may also include a next-level impact factor of the target base station; of course, the timing information of the target base station may be included as the number of other base stations that are synchronously adjusted. In addition, as a source base station that provides synchronization information for other base stations, synchronization level information may also be sent to other base stations, the synchronization level indicating a level at which the source base station is in the synchronization process, and a description of the synchronization level. The above content is not described here.

The above embodiment is taken as an example of a newly deployed target base station. When the target base station is the deployed base station, for example, the deployed base station restarts the synchronization detection after the out-of-synchronization or the deployed base station performs the synchronization detection in the process of serving the user equipment, and the synchronization information may also be acquired in the foregoing manner, and then performed. Synchronous adjustment. For example, when the target base station is out of synchronization or the synchronization source is confusing, it can be synchronized with the source base station with high impact factor. The influence factors are the same as those in this embodiment, and are not described here. For example, the impact factor may be a synchronization level, which is synchronized with the source base station with the highest or higher impact factor, may be synchronized with the source base station with the highest or higher synchronization level, where the highest synchronization level may be represented by 0. It may also be represented by other numbers, where the source base station with the highest or higher synchronization level may be a macro base station or a base station (for example, a micro base station) equipped with GPS.

FIG. 2 is a schematic structural diagram of an apparatus for synchronizing and coordinating between base stations according to an embodiment of the present invention; the apparatus may be used to implement the foregoing method embodiments. The apparatus for synchronously coordinating between the base stations includes: a detecting unit 21, a determining unit 22, an obtaining unit 23, and a synchronizing unit 24, wherein the detecting unit 21 is configured to acquire a plurality of base stations at one frequency point or multiple frequency points. Preferably, the detected mode can detect signals transmitted by multiple base stations at one frequency point, or can be detected by blind detection, for example, scanning each frequency point at a fixed frequency interval, and detecting each base station transmitting signal of.

The determining unit 22 is configured to determine a source base station according to the signal strength of the signal. Preferably, the determining unit 22 includes: a calculating unit, a comparing unit, and an interference determining unit, where the calculating unit is used for calculating a signal strength of the signal; the comparison unit is configured to compare a signal strength of the signal with a preset threshold value; the interference determining unit is configured to compare the comparison unit by the The base station corresponding to the signal strength of the threshold is determined as the source base station.

The acquiring unit 23 is configured to acquire an impact factor of the source base station and/or acquire an upper layer of the source base station The impact factor of the base station of the synchronization level; optionally, the impact factor acquired by the acquiring unit is obtained according to at least one of the following: synchronization precision of the source base station, or synchronization information of the source base station as a base station for synchronization adjustment reference Number, or the synchronization accuracy of the base station using the synchronization information of the source base station as a synchronization adjustment reference;

Preferably, the acquiring unit specifically includes: a first acquiring unit and/or a second acquiring unit, where the first acquiring unit is configured to control broadcast signaling, radio resource control proprietary signaling, and media by using radio resources Obtaining an impact factor of the source base station by using access control signaling or physical layer signaling, or acquiring an impact factor of the source base station of any upper layer synchronization level of the source base station;

The second acquiring unit is configured to acquire, by means of a blind detection, an impact factor of a base station of any upper synchronization level of the source base station.

The synchronization unit 24 is configured to use the base station whose impact factor reaches a preset range as a synchronization source base station, and keep synchronization with the synchronization source base station.

For the implementation of the functions and functions of the various units in the device, refer to the implementation process of the corresponding steps in the foregoing method, and details are not described herein again.

Optionally, on the basis of the foregoing embodiment, the apparatus for synchronizing and coordinating between the base stations may further include: a first sending unit 31, and a schematic structural diagram thereof is shown in FIG. 3, where FIG. 3 is a schematic diagram of an embodiment of the present invention. Another structural schematic diagram of a device for synchronous coordination between base stations. The first sending unit 31 is configured to: after the device synchronization source base station maintains synchronization, send synchronization information to a source base station other than the synchronization source base station in the source base station, to facilitate the source base station. The source base station other than the synchronization source base station adjusts its own synchronization information. Optionally, the synchronization information sent by the first sending unit 31 includes: an impact factor of the target base station. However, the present invention is not limited thereto, and may be other synchronization information, which is not limited in this embodiment.

Optionally, on the basis of the foregoing embodiment, the apparatus may further include: a second sending unit, configured to: after the device keeps synchronization with a source base station with a high impact factor, to obtain the source base station of the impact factor Feedback information, the information including the impact factor of the device after synchronization.

FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present disclosure, where the base station can be used to implement the foregoing method embodiments. The base station 4 includes: a processor 41 and a transceiver 42, wherein the processor 41 is configured to detect signals transmitted by multiple base stations at one frequency point or multiple frequency points; and according to signal strength of the signal Determining a source base station; the transceiver 42 is configured to acquire an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station; the processor 41 is further configured to: A base station whose impact factor reaches a preset range is used as a synchronization source base station; and the transceiver is further configured to maintain synchronization with the synchronization source base station. Optionally, the transceiver obtains an impact factor of the source base station by using radio resource control broadcast signaling, radio resource control proprietary signaling, media access control signaling, or physical layer signaling, or The method of detecting acquires the influence factor of the base station of the upper layer synchronization level of the source base station.

Preferably, the impact factor obtained by the transceiver is obtained according to at least one of the following: synchronization precision of the source base station, number of base stations using synchronization information of the source base station as a synchronization adjustment reference, and synchronization information of the source base station Synchronously adjust the synchronization accuracy of the reference base station.

Optionally, the transceiver is further configured to: after synchronization, send synchronization information to a source base station other than the synchronization source base station in the source base station, so as to facilitate source base stations other than the synchronization source base station. Adjust your own sync information.

Optionally, the transceiver is further configured to: after synchronization, feed back synchronization information to the synchronization source base station, where the synchronization information includes an impact factor after synchronization of the target base station.

Optionally, on the basis of the foregoing embodiment, the determining, by the processor, the base station that reaches the preset range as the synchronization source base station, the method includes: using, as a synchronization source, a base station whose impact factor is greater than a predetermined value. Base station.

Optionally, on the basis of the foregoing embodiment, the determining, by the processor, the source base station according to the signal strength of the signal, includes:

Calculating a signal strength of the signal; comparing a signal strength corresponding to the signal with a preset threshold, and determining, as a source base station, a base station corresponding to the signal strength exceeding the threshold.

For the implementation process of the functions and functions of the processor and the transceiver in the base station, refer to the implementation process of the corresponding steps in the foregoing method, and details are not described herein again.

In the embodiment of the present invention, since the impact factor is introduced, in the synchronization adjustment, the signal strength of the detected base station is first considered, and the source base station is determined, and the influence factor of the source base station is also considered, and the base station with high impact factor is used. Adjust your own timing information. Thereby, the number of base stations participating in the synchronization adjustment in the system is reduced, the complexity of the system operation is reduced, and the impact on the service users is reduced. Further, after the synchronization adjustment, the synchronization information may also be sent to other source base stations to quickly start the synchronization adjustment process of other source base stations.

It should be noted that, in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such entities or operations. There is any such actual relationship or order between them. Furthermore, the terms "comprising,""comprising," or "include" or "include" or "the" Other elements, or elements that are inherent to such a process, method, item, or device. In the absence of more restrictions, the statement "includes one..." A defined element does not exclude the presence of additional elements in the process, method, article, or device that comprises the element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is considered as the scope of protection of the present invention.

Claims

Rights request

A method for synchronous coordination between base stations, comprising:

Determining, by the target base station, a source base station according to a signal strength of the signal;

Obtaining, by the target base station, an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station;

2. The method according to claim 1, wherein the impact factor is obtained according to at least one of the following: a synchronization accuracy of the source base station, a number of base stations using synchronization information of the source base station as a synchronization adjustment reference, and The synchronization information of the source base station serves as the synchronization accuracy of the base station to which the synchronization adjustment is referenced.

The method according to claim 1 or 2, further comprising:

After the synchronization, the target base station sends synchronization information to the source base station other than the synchronization source base station, so that the source base station other than the synchronization source base station adjusts its own synchronization information.

The method according to claim 3, wherein the transmitted synchronization information comprises: an impact factor of the target base station.

The method according to any one of claims 1 to 4, further comprising: after the synchronization, the target base station feeds back synchronization information to the synchronization source base station.

The method according to any one of claims 1 to 5, wherein the target base station uses a base station whose impact factor reaches a preset range as a synchronization source base station, and keeps synchronization with the synchronization source base station. Includes:

The method according to any one of claims 1 to 6, wherein the target base station acquires an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station, Specifically include:

The target base station receives the first signaling, where the first signaling includes at least one of the following: radio resource control broadcast signaling, radio resource control proprietary signaling, media access control signaling, and physical layer signaling, Obtaining, in the first signaling, an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station; or

The target base station acquires an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station by means of a blind check.

8. A device for synchronous coordination between base stations, comprising:

a detecting unit, configured to detect a signal transmitted by a plurality of base stations at one frequency point or multiple frequency points; and a determining unit, configured to determine a source base station according to a signal strength of the signal;

And a synchronization unit, configured to use the base station that reaches the preset range as the synchronization source base station, and maintain synchronization with the synchronization source base station.

The apparatus according to claim 8, wherein the impact factor acquired by the acquiring unit is obtained according to at least one of the following: synchronization precision of the source base station, and synchronization information of the source base station as a synchronization adjustment reference The number of base stations and the synchronization information of the source base station are used as synchronization accuracy of the base station for synchronization adjustment reference.

The device according to claim 8 or 9, further comprising:

The device according to claim 10, wherein the synchronization information sent by the first sending unit comprises: an impact factor of the target base station.

The device according to any one of claims 8 to 11, further comprising: a second sending unit, configured to feed back synchronization information to the synchronization source base station after synchronization.

The device according to any one of claims 8 to 12, wherein the synchronization unit is specifically configured to use a base station whose impact factor is greater than a predetermined value as a synchronization source base station, and maintain the same with the synchronization source base station. Synchronize.

The device according to any one of claims 8 to 13, wherein the obtaining unit comprises:

The first acquiring unit is configured to receive the first signaling, where the first signaling includes at least one of the following: radio resource control broadcast signaling, radio resource control proprietary signaling, media access control signaling, and physical layer signaling. And obtaining, by the first signaling, an impact factor of the source base station and/or an impact factor of a base station of an upper layer synchronization level of the source base station; or

And a second acquiring unit, configured to acquire, by means of a blind detection, an impact factor of the base station of the upper synchronization level of the source base station.

A base station, comprising:

a transceiver, an impact factor of the base station for acquiring an impact factor of the source base station and/or a base station synchronization level of the source base station;

The processor is further configured to use a base station whose impact factor reaches a preset range as a synchronization source base station;

The transceiver is further configured to maintain synchronization with the synchronization source base station.

The base station according to claim 15, wherein the impact factor obtained by the transceiver is obtained according to at least one of the following: synchronization accuracy of the source base station, and synchronization information of the source base station as a synchronization adjustment reference The number of base stations and the synchronization information of the source base station are used as synchronization accuracy of the base station for synchronization adjustment reference.

17. A base station according to claim 15 or 16, characterized in that

The transceiver is further configured to: after synchronization, send synchronization information to the source base station except the synchronization source base station, so that the source base station other than the synchronization source base station adjusts its synchronization. Letter Interest.

The base station according to any one of claims 15 to 17, characterized in that

The transceiver is further configured to feed back synchronization information to the synchronization source base station after synchronization.

The base station according to any one of claims 15 to 18, wherein the processor is configured to use the base station whose impact factor reaches a preset range as the synchronization source base station, and specifically includes: A base station of a predetermined value serves as a synchronization source base station.

The base station according to any one of claims 15 to 19, wherein the transceiver is specifically configured to receive the first signaling, where the first signaling includes at least one of the following: a radio resource control broadcast Signaling, radio resource control proprietary signaling, media access control signaling, and physical layer signaling, acquiring an impact factor of the source base station and/or an upper layer synchronization level of the source base station from the first signaling The impact factor of the base station; or the impact factor of the base station for acquiring the upper synchronization level of the source base station by blind detection.