CN104853428B - The method and device of air interface synchronization, communication network element - Google Patents

Abstract

The invention discloses a method and device for air interface synchronization, and a communication network element, wherein the method includes: the network element to be synchronized listens to broadcast messages and system messages of more than one network element of a different operator, and communicates with the one or more network elements. A first network element among the above network elements performs frame synchronization; listens to the system message of the first network element, and obtains the synchronization level and/or synchronization state information of the first network element; the network element to be synchronized is based on When the synchronization level and/or synchronization state information of the first network element determines that it needs to be synchronized, a synchronization operation with the first network element is initiated to synchronize with the first network element. It effectively solves the problem that the synchronization of the air interface cannot be completed based on the existing backhaul signaling (S1 signaling) when there is a lack of backhaul interfaces such as S1 between different operators, and the synchronization accuracy is high.

Description

Method and device for air interface synchronization, and communication network element

technical field

The present invention relates to the technology of synchronizing base stations between different operators, in particular to a method and device for air interface synchronization, and a communication network element.

Background technique

In order to suppress interference between base stations of Time Division Duplexing (TDD) operators, TDD base stations deployed on the same frequency need to perform time-frequency synchronization between stations. There are currently three time-frequency synchronization schemes: (1) synchronization based on Global Navigation Satellite System (GNSS, Global Navigation Satellite System), such as Global Positioning System (GPS, Global Positioning System) synchronization; (2) synchronization based on ideal backhaul network , such as IEEE1588v2 synchronization; (3) air interface synchronization (radio-interface based synchronization mechanism). In typical application scenarios of Long Term Evolution (LTE, Long Term Evolution) systems such as indoor and high-rise hotspot coverage, GPS signals are not easy to obtain, and the ideal backhaul of the IEEE1588v2 synchronization mechanism is difficult to guarantee. Therefore, small cell (Small cell) enhancement mainly considers air interface synchronization technology .

At present, 3GPP focuses on the air interface synchronization technology of network listening. The basic principle is that the base station to be synchronized (called the target base station) listens to the reference signal (RS, Reference Signal) of the synchronized base station (called the source base station). , and adjust the local clock accordingly to maintain the time-frequency synchronization between stations.

The existing air interface synchronization technical solutions mainly solve the problem of TDD uplink-downlink (UL-DL) time slot interference within operators, and do not consider the synchronization requirements between operators. However, at the commercial stage of 4G LTE, different TD-LTE operators may jointly deploy their own TD-LTE networks in the same geographical area, and the TDD spectrum allocation of different operators may be adjacent frequency allocation (the case of co-frequency allocation is not excluded) , if the TD-LTE networks between operators are not synchronized, it will cause uplink and downlink cross-slot interference generated by the networks of different TDD operators.

There is currently no effective solution to the above problems.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the embodiments of the present invention provide an air interface synchronization method and device, and a communication network element, which can realize precise synchronization between base stations of different operators.

The technical solution of the embodiment of the present invention is realized as follows:

A method for air interface synchronization, comprising:

The network element to be synchronized listens to broadcast messages and system messages of more than one network element of a different operator, and performs frame synchronization with a first network element of the more than one network element;

listening to the system message of the first network element, and acquiring the synchronization level and/or synchronization state information of the first network element;

When the network element to be synchronized determines that it needs to be synchronized based on the synchronization level and/or synchronization state information of the first network element, it initiates a synchronization operation with the first network element to synchronize with the first network element.

Preferably, the method further includes:

carrying the synchronization level and/or synchronization status information in the system information block SIB;

Correspondingly, the listening of the broadcast message and the system message of the first network element, and obtaining the synchronization level and/or synchronization state information of the first network element, includes:

The network element to be synchronized listens to the SIB in the system message of the first network element, and acquires the synchronization level and/or synchronization state information of the first network element.

Preferably, the method further includes:

Carrying synchronization level and/or synchronization status information in system information block one SIB1;

Correspondingly, the acquiring the synchronization level and/or synchronization state information of the first network element by listening to the system message of the first network element includes:

The network element to be synchronized listens to SIB1 in the system message of the first network element, and acquires the synchronization level and/or synchronization state information of the first network element.

Preferably, the initiating a synchronization operation with the first network element and synchronizing with the first network element includes:

The network element to be synchronized determines its own synchronization level and/or synchronization state information according to the synchronization level and/or synchronization state of the first network element obtained from the system information.

Preferably, when acquiring the synchronization level and/or synchronization state information of the first network element, the method further includes:

obtaining, by the network element to be synchronized, random access configuration information for accessing the first network element;

The initiating a synchronization operation with the first network element and synchronizing with the first network element includes:

Initiating a synchronization operation with the first network element based on the random access configuration information, and synchronizing with the first network element.

Preferably, the random access configuration information includes: configuration information of the random access scrambling code sequence of the first network element and transmit power information of the random access signal;

Correspondingly, the initiating a synchronization operation with the first network element based on the random access configuration information to synchronize with the first network element includes:

The network element to be synchronized sends a random access request signal to the first network element based on the configuration information of the random access scrambling code sequence and the transmit power of the random access signal, and receives the first network element according to the received signal. The timing advance determined by the random access request signal, and the timing error with the first network element is compensated based on the timing advance, so as to complete the synchronization with the first network element.

Preferably, when the network element to be synchronized is not configured with the customer identification module SIM card of the operator to which the first network element belongs, a scrambling code sequence dedicated to synchronization of the first network element is configured;

When the network element to be synchronized is configured with the customer identification module SIM card of the operator to which the first network element belongs, the random access scrambling code sequence is randomly configured from a predetermined set of scrambling code sequences.

A device for air interface synchronization, comprising a first listening unit, a first synchronization unit, a second listening unit, an acquisition unit, a determination unit and a synchronization initiation unit; wherein:

a first listening unit, configured to listen to broadcast messages and system messages of more than one network element of a different operator;

a first synchronization unit, configured to perform frame synchronization with one of the more than one network elements based on the listening result of the first listening unit;

a second listening unit, configured to listen to the system message of the first network element;

an acquiring unit, configured to acquire the synchronization level and/or synchronization state information of the first network element based on the interception result of the second interception unit;

a determining unit, configured to trigger a synchronization initiating unit when it is determined based on the synchronization level and/or synchronization state information of the first network element that the network element to be synchronized needs to be synchronized;

A synchronization initiating unit, configured to initiate a synchronization operation with the first network element, so as to synchronize the network element to be synchronized with the first network element.

Preferably, the device further comprises:

a first bearing unit, configured to carry the synchronization level and/or synchronization status information in the system information block SIB;

Correspondingly, the second listening unit is further configured to listen to the SIB in the system message of the first network element, and obtain the synchronization level and/or synchronization state information of the first network element.

Preferably, the device further comprises:

a second bearing unit, configured to carry the synchronization level and/or synchronization status information in the system information block-SIB1;

Correspondingly, the second listening unit is further configured to listen to SIB1 in the system message of the first network element, and acquire the synchronization level and/or synchronization state information of the first network element.

Preferably, the synchronization initiating unit is further configured to determine the synchronization level and/or synchronization state information of the network element to be synchronized according to the synchronization level and/or synchronization state of the first network element obtained from the system information .

Preferably, when acquiring the synchronization level and/or synchronization state information of the first network element, the acquiring unit also acquires random access configuration information for accessing the first network element;

The synchronization initiating unit is further configured to initiate a synchronization operation with the first network element based on the random access configuration information, and synchronize with the first network element.

Preferably, the random access configuration information includes: configuration information of the random access scrambling code sequence of the first network element and transmit power information of the random access signal;

Correspondingly, the synchronization initiating unit is further configured to send a random access request signal to the first network element with the configuration information of the random access scrambling code sequence and the transmit power of the random access signal, and receive the random access request signal. The first network element compensates the timing error between the network element to be synchronized and the first network element based on the timing advance determined by the random access request signal, and completes the communication with the first network element. synchronization.

Preferably, when the network element to be synchronized is not configured with the customer identification module SIM card of the operator to which the first network element belongs, a scrambling code sequence dedicated to synchronization of the first network element is configured;

When the network element to be synchronized is configured with the customer identification module SIM card of the operator to which the first network element belongs, the random access scrambling code sequence is randomly configured from a predetermined set of scrambling code sequences.

A communication network element includes the aforementioned device for air interface synchronization.

Preferably, the communication network element includes a base station.

The embodiment of the present invention effectively solves the problem that the synchronization of the air interface cannot be completed based on the existing backhaul signaling (S1 signaling) in the absence of a backhaul interface such as S1 between different operators; the implementation complexity of the embodiment of the present invention is low, and the existing The influence of communication standards is small; the embodiment of the present invention does not need to configure the SIM card of the other party between different operators, nor does it need to initiate random access between different operators; the embodiment of the present invention can also adjust the timing on the basis of coarse synchronization. Advance (TA, Timing Advance) is used for compensation, which improves the precision of coarse synchronization during the establishment of air interface synchronization.

Description of drawings

1 is a flowchart of a method for air interface synchronization according to an embodiment of the present invention;

2 is a flowchart of a method for air interface synchronization according to Embodiment 1 of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus for air interface synchronization according to an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

FIG. 1 is a flowchart of a method for air interface synchronization according to an embodiment of the present invention. As shown in FIG. 1 , the method for air interface synchronization according to an embodiment of the present invention includes the following steps:

Step 101: The network element to be synchronized listens to broadcast messages and system messages of more than one network element of a different operator, and performs frame synchronization with a first network element of the more than one network element.

In cross-operator synchronization, there is a problem of determining the synchronization reference base station. Since carrier 1 and carrier 2 can monitor each other, it is difficult to determine whether carrier 1 synchronizes with carrier 2 or carrier 2 synchronizes with carrier 1. Therefore, cross-operator synchronization requires knowledge of the synchronization level (stratum level).

In addition, if the monitored synchronization reference base station of a different operator is itself an asynchronous base station, it will cause the current network to lose synchronization and cause more serious interference with other synchronized operators. Therefore, it is necessary to know the synchronization status information for cross-operator synchronization.

Since there is no backhaul interface between base stations of different operators, in order to support the synchronization of the air interface between operators, a radio frequency (RF) receiving module can be added to the base station of operator 1, and the UE of operator 2 can be The identity air interface monitoring operator 2 can detect all the information before the uplink random access RACH process MSG3 (such as primary synchronization signal (PSS)/secondary synchronization signal (SSS), main information block (MIB)/system information block SIB, Cell-specific reference signal (CRS), etc.), and obtain the timing advance TA to complete the closed-loop synchronization establishment process without requiring the authentication of the counterparty operator; in particular, it is convenient to read the SIB messages of other operators.

In order to support cross-operator synchronization, considering that the base stations between cross-operators carry and send synchronization information in system messages (SIB messages), the present invention needs to perform the following configurations:

Carry and send synchronization level (stratum level) information in SIB messages;

and/or, carrying and sending synchronization status information in SIB messages;

The stratum level information and/or the synchronization status information is carried in the SIB-1 message and sent in subframe #5. It should be noted that it is a preferred way to carry the stratum level information and the synchronization status information in the SIB-1 of the #5 subframe, and the stratum level information and/or the synchronization status information in the embodiment of the present invention only needs to be carried in the SIB-1 of the #5 subframe. It can be sent in the SIB message, and it is not limited to SIB1, and SIB1 is only a preferred way. Because SIB2 to SIB13 and so on also need the resources indicated by SIB1 for scheduling, SIB1 is more convenient to implement fast detection across operators.

The base station of the out-of-sync operator determines the synchronization level and/or synchronization status information of the synchronization reference base station of the other operator's base station by monitoring the synchronization information carried in the SIB message of other Synchronization information such as synchronization level and synchronization status; complete the process of establishing air interface synchronization between operators.

In this step, the frame synchronization is coarse synchronization.

Step 102: Listen to the system message of the first network element, and acquire the synchronization level and/or synchronization state information of the first network element.

Specifically, by listening to the SIB, the synchronization level and/or synchronization state information of the first network element is acquired. The above-mentioned SIB refers in particular to SIB1.

Step 103: When the network element to be synchronized determines that it needs to be synchronized based on the synchronization level and/or synchronization state information of the first network element, it initiates a synchronization operation with the first network element, and synchronizes with the first network element. Synchronize.

Specifically, the network element to be synchronized determines its own synchronization level and/or synchronization state information according to the synchronization level and/or synchronization state of the first network element obtained from the system information.

Or, in step 102, when the synchronization level and/or synchronization state information of the first network element is obtained, the random access configuration information for accessing the first network element is also obtained;

The initiating a synchronization operation with the first network element and synchronizing with the first network element specifically includes:

Initiating a synchronization operation with the first network element based on the random access configuration information, and synchronizing with the first network element.

The random access configuration information includes: configuration information of the random access scrambling code sequence of the first network element and transmit power information of the random access signal;

Correspondingly, the initiating a synchronization operation with the first network element based on the random access configuration information to synchronize with the first network element includes:

The network element to be synchronized sends a random access request signal to the first network element based on the configuration information of the random access scrambling code sequence and the transmit power of the random access signal, and receives the first network element according to the received signal. the timing advance determined by the random access request signal, compensate the timing error with the first network element based on the timing advance, and complete the synchronization with the first network element

When the network element to be synchronized is not configured with the customer identification module SIM card of the operator to which the first network element belongs, configure a scrambling code sequence dedicated to synchronization of the first network element;

When the network element to be synchronized is configured with the customer identification module SIM card of the operator to which the first network element belongs, the random access scrambling code sequence is randomly configured from a predetermined set of scrambling code sequences.

The essence of the technical solution of the present invention is further clarified by specific examples below.

Example 1

FIG. 2 is a flowchart of a method for air interface synchronization according to Embodiment 1 of the present invention. As shown in FIG. 2 , this example is a closed-loop air interface synchronization establishment solution. Operator 1 does not need to configure the SIM card of operator 2, that is, operator 2 is not required. authentication authentication.

Step 1: The base station to be synchronized of the operator 1 works in the UE mode of the operator 2, and performs air interface interception; the base station of the operator 1 does not need to be configured with the SIM card of the operator 2. The specific listening process is as follows:

The base station to be synchronized of operator 1 listens to the PSS/SSS/PBCH and other information of several base stations of operator 2, selects a base station with the strongest signal as the synchronization reference base station; and obtains the initial frame synchronization (coarse synchronization);

The base station to be synchronized of operator 1 listens to the SIB message of the synchronization reference base station of operator 2, and obtains the synchronization information of the synchronization reference base station of operator 2, and the PRACH configuration information;

The base station to be synchronized of operator 1 updates its own synchronization information, such as stratum level, synchronization status, etc., according to the detected synchronization information of the synchronization reference base station of operator 2.

The base station to be synchronized of operator 1 listens to information such as the downlink reference signal (DLRS) of the synchronization reference base station of operator 2 to determine the preamble transmission power.

Step 2: The base station to be synchronized of operator 1 initiates a random access request to the synchronization reference base station of operator 2 and obtains a random access response (Msg1+Msg2).

A specific preamble is predefined to support cross-operator synchronization to support synchronization of non-SIM cards between cross-operator base stations. Since operator 1 does not configure the SIM card of operator 2 in Embodiment 1, only MSG1+MSG2 of the random access process can be completed, and subsequent user authentication behaviors of MSG3+MSG4 cannot be performed; if the competition-based PRACH access is used Entering the process, it may happen that multiple base stations of operator 1 send the same Preamble when they compete for access. At this time, after a base station of operator 1 obtains the corresponding TA for random access, it cannot determine whether the TA is for itself or not. of. Reserving a specific preamble for cross-operator synchronization can avoid the preamble conflict problem of competing access.

The process of initiating random access is as follows:

The base station to be synchronized of operator 1 sends a preamble (MSG1) to the synchronization reference base station of operator 2 according to the PRACH configuration determined by the synchronization reference base station of operator 2 and the preamble transmission power according to the air interface listening;

The synchronization reference base station of operator 2 determines the timing advance (Timing Advance);

The synchronization reference base station of operator 2 feeds back a random access response (Random Access Response) to the base station to be synchronized of operator 1, which includes the TA timing advance information (MSG2);

Step 3: The base station to be synchronized of the operator 1 obtains the timing advance according to the random access response of the synchronization reference base station of the operator 2, and adjusts the uplink timing to complete the air interface synchronization establishment process.

The base station to be synchronized of operator 1 obtains the timing advance TA from the random access response received by the synchronization reference base station of operator 2;

The base station to be synchronized of operator 1 adjusts the uplink timing according to the TA and completes the establishment of air interface synchronization (TA compensation, including propagation delay, etc.)

Example 2

The closed-loop air interface synchronization establishment solution. In this example, operator 1 needs to configure the SIM card of operator 2, that is, the authentication and authentication of operator 2 is required.

Step 1: The base station to be synchronized of the operator 1 works in the UE mode of the operator 2 (configures the SIM card of the operator 2), and performs air interface listening;

The base station to be synchronized of operator 1 listens to broadcast information such as PSS/SSS/PBCH of several base stations of operator 2, selects a base station with the strongest signal as the synchronization reference base station; and obtains the initial frame synchronization (coarse synchronization).

The base station to be synchronized of operator 1 listens to the SIB message of the synchronization reference base station of operator 2, and obtains the synchronization information of the synchronization reference base station of operator 2, and the configuration information of physical random access channel (PRACH, Physical Random Access Channel);

The base station to be synchronized of operator 1 updates its own synchronization information, such as stratum level, synchronization status, etc., according to the detected synchronization information of the synchronization reference base station of operator 2.

The base station to be synchronized of operator 1 listens to information such as DL RS of the synchronization reference base station of operator 2 to determine the preamble transmission power.

Step 2: The base station to be synchronized of operator 1 initiates a random access request to the synchronization reference base station according to the behavior of the ordinary UE of operator 2 and completes the complete random access process (MSG1+MSG2+MSG3+MSG4). The specific process is as follows:

The base station to be synchronized of operator 1 sends a preamble to the synchronization base station of operator 2 according to the PRACH configuration determined by the synchronization reference base station of operator 2 and the preamble transmission power according to the air interface listening (because the base station to be synchronized of operator 1 is configured with operator 2 The SIM card of operator 1, the base station to be synchronized of operator 1 randomly sends the preamble, because the user authentication behavior of MSG3+MSG4 follows, so even if multiple base stations of operator 1 send the same preamble when they compete for PRACH access, they can pass the follow-up The SIM card authentication and authentication are distinguished, and no Preamble conflict will occur) (MSG1)

The synchronization reference base station of operator 2 determines the timing advance (Timing Advance);

The synchronization reference base station of operator 2 feeds back a random access response (Random Access Response) to the base station to be synchronized of operator 1, which includes the TA timing advance information (MSG2);

The base station to be synchronized of operator 1 sends MSG3 to operator 2, and the MSG3 carries the user identity (MSG3);

The synchronization reference base station of operator 2 sends MSG4 to the base station to be synchronized of operator 1, and confirms the user identity (MSG4) in MSG4.

Step 3: The base station to be synchronized of the operator 1 adjusts the uplink timing according to the timing advance TA determined in the random access response of the synchronization reference base station of the operator 2 to complete the air interface synchronization establishment process.

The base station to be synchronized of operator 1 adjusts the uplink timing according to the acquired TA and completes the synchronization establishment process (TA compensation, including propagation delay, etc.).

Example 3

The open-loop air interface synchronization establishment scheme does not compensate TA, and the base station to be synchronized of operator 1 does not need to be configured with the SIM card of operator 2, that is, during the synchronization process, the base station to be synchronized of operator 1 does not need the authentication of operator 2.

Step 1: The base station to be synchronized of operator 1 works in the UE mode of operator 2, and performs air interface listening to complete the air interface synchronization establishment process:

The base station to be synchronized of operator 1 listens to broadcast information such as PSS/SSS/PBCH of several base stations of operator 2, and selects a base station with the strongest signal as the synchronization reference base station; and obtains initial frame synchronization (only coarse synchronization is obtained, no TA compensation, the accuracy of synchronization establishment may be worse than the closed-loop scheme).

The base station to be synchronized of operator 1 listens to the SIB message of the synchronization reference base station of operator 2, and obtains the synchronization information of the synchronization reference base station of operator 2;

The base station to be synchronized of operator 1 updates its own synchronization information, such as stratum level, synchronization status, etc., according to the detected synchronization information of the synchronization reference base station of operator 2.

In the embodiment of the present invention, the air interface synchronization process is actually divided into two major steps: air interface synchronization establishment (coarse synchronization) and air interface synchronization tracking (fine synchronization). The focus of the embodiment of the present invention is to solve the first step, that is, the air interface The process of how synchronization is established and completes a coarse synchronization.

Although the technical solutions of the embodiments of the present invention are mainly proposed for the scenarios and requirements of inter-operator synchronization, the technical solutions themselves can be applied to inter-operator synchronization or intra-operator synchronization.

FIG. 3 is a schematic structural diagram of an apparatus for air interface synchronization according to an embodiment of the present invention. As shown in FIG. 3 , the apparatus for air interface synchronization according to an embodiment of the present invention includes a first listening unit 30 , a first synchronization unit 31 , and a second listening unit 31 . unit 32, acquisition unit 33, determination unit 34 and synchronization initiation unit 35; wherein:

a first listening unit 30, configured to listen to broadcast messages and system messages of more than one network element of a different operator;

a first synchronization unit 31, configured to perform frame synchronization with one of the more than one network elements based on the listening result of the first listening unit;

a second listening unit 32, configured to listen to the system message of the first network element;

an obtaining unit 33, configured to obtain the synchronization level and/or synchronization state information of the first network element based on the listening result of the second listening unit;

A determining unit 34, configured to trigger a synchronization initiating unit when it is determined based on the synchronization level and/or synchronization state information of the first network element that the network element to be synchronized needs to be synchronized;

The synchronization initiating unit 35 is configured to initiate a synchronization operation with the first network element, so as to synchronize the network element to be synchronized with the first network element.

On the basis of the device shown in FIG. 3 , the device for inter-operator air interface synchronization according to the embodiment of the present invention further includes:

a first bearing unit 36, configured to carry the synchronization level and/or synchronization status information in the system information block SIB;

Correspondingly, the second listening unit 32 is further configured to listen to the SIB in the system message of the first network element, and obtain the synchronization level and/or synchronization state information of the first network element.

On the basis of the device shown in FIG. 1 , the device for inter-operator air interface synchronization according to the embodiment of the present invention further includes:

The second bearing unit 37 is configured to carry the synchronization level and/or synchronization status information in the system information block-SIB1;

Correspondingly, the second listening unit 32 is further configured to listen to the SIB1 in the system message of the first network element, and acquire the synchronization level and/or synchronization state information of the first network element.

It should be noted that the first bearer unit 36 and the second bearer unit 37 shown in FIG. 3 are not necessary processing units of the apparatus for realizing the inter-operator air interface synchronization according to the embodiment of the present invention, but are only for better realizing the embodiment of the present invention. It is an additional technical means for the device of inter-operator air interface synchronization.

The above-mentioned second bearing unit 37 is further configured to carry the synchronization level and/or synchronization state information in the subframe with the identification number 5 of the SIB1.

The above synchronization initiating unit 35 is further configured to determine the synchronization level and/or synchronization state information of the network element to be synchronized according to the synchronization level and/or synchronization state of the first network element obtained from the system information.

When acquiring the synchronization level and/or synchronization state information of the first network element, the obtaining unit 33 further obtains random access configuration information for accessing the first network element;

Correspondingly, the above synchronization initiating unit 35 is further configured to initiate a synchronization operation with the first network element based on the random access configuration information, and synchronize with the first network element.

The random access configuration information includes: configuration information of the random access scrambling code sequence of the first network element and transmit power information of the random access signal;

Correspondingly, the synchronization initiating unit 35 is further configured to send a random access request signal to the first network element with the configuration information of the random access scrambling code sequence and the transmit power of the random access signal, and receive the random access request signal. The first network element compensates the timing error between the network element to be synchronized and the first network element based on the timing advance determined by the random access request signal, and completes the communication with the first network element. Meta synchronization

In the embodiment of the present invention, when the network element to be synchronized is not configured with the customer identification module SIM card of the operator to which the first network element belongs, a scrambling code sequence dedicated to synchronization of the first network element is configured;

When the network element to be synchronized is configured with the customer identification module SIM card of the operator to which the first network element belongs, the random access scrambling code sequence is randomly configured from a predetermined set of scrambling code sequences.

Those skilled in the art should understand that the implementation function of each processing unit in the apparatus for air interface synchronization shown in FIG. 3 can be understood by referring to the related description of the foregoing air interface synchronization method. Those skilled in the art should understand that the functions of each processing unit in the device for air interface synchronization shown in FIG. 3 can be implemented by a program running on the processor, or can be implemented by a specific logic circuit.

The embodiment of the present invention further describes a communication network element, including the device for air interface synchronization shown in FIG. 3 . The communication network element is in particular a base station.

The technical solutions described in the embodiments of the present invention may be combined arbitrarily if there is no conflict.

In the several embodiments provided by the present invention, it should be understood that the disclosed method, apparatus and electronic device may be implemented in other manners. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the various components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms. of.

The unit described above as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may all be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integration The unit can be realized in the form of hardware, or can be realized in the form of hardware plus application function unit.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by program instructions related to hardware, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute Including the steps of the above method embodiments; and the aforementioned storage medium includes: a mobile storage device, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk and other various A medium on which program code can be stored.

Alternatively, if the above-mentioned integrated unit in the embodiment of the present invention is implemented in the form of an application function module and sold or used as an independent product, it may also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present invention essentially or the parts that make contributions to the prior art can be embodied in the form of application products, and the computer application products are stored in a storage medium and include several instructions for A computer device (which may be a personal computer, a server, or a network device, etc.) is caused to execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: a removable storage device, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk and other media that can store program codes.

The protection scope of the present invention is not limited to this, and those skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention, which should all be included within the protection scope of the present invention.

Claims (12)

1. a kind of method of air interface synchronization, which is characterized in that the described method includes:

Network element to be synchronized listens to the broadcast message and system message of more than one network element of different operator, and with it is one more than First network element in network element carries out frame synchronization；

The system message of first network element is listened to, the synchronization levels and/or Synchronization Status Message of first network element are obtained；

Synchronization levels and/or Synchronization Status Message of the network element to be synchronized based on first network element are initiated and described first The simultaneously operating of network element, it is synchronous with first network element；

Wherein, when the synchronization levels and/or Synchronization Status Message for obtaining first network element, the method also includes:

The network element to be synchronized obtains the random access configuration information for being linked into first network element；

The simultaneously operating of the initiation and first network element, it is synchronous with first network element, comprising:

The simultaneously operating with first network element is initiated based on the random access configuration information, it is synchronous with first network element；

Wherein, the random access configuration information includes: the configuration information of the random access scrambler sequence of the first network element and random Access the transmission power information of signal；

Accordingly, it is described based on the random access configuration information initiate with the simultaneously operating of first network element, with described the One network element is synchronous, comprising:

The network element to be synchronized with the transmission power of the configuration information of the random access scrambler sequence and accidental access signal to First network element sends random access request signal, and it is true according to the random access request signal to receive first network element Fixed Timing Advance is completed and described first based on the timing error of Timing Advance compensation and first network element The synchronization of network element.

2. the method according to claim 1, wherein the method also includes:

Synchronization levels and/or Synchronization Status Message are carried in system information block SIB；

Accordingly, the system message for listening to first network element obtains the synchronization levels and/or synchronization of first network element Status information, comprising:

The network element to be synchronized listens to the SIB in the system message of first network element, obtains the synchronisation stage of first network element Other and/or Synchronization Status Message.

3. the method according to claim 1, wherein the method also includes:

Synchronization levels and/or Synchronization Status Message are carried in one SIB1 of system information block；

Accordingly, the system message for listening to first network element obtains the synchronization levels and/or synchronization of first network element Status information, comprising:

The network element to be synchronized listens to the SIB1 in the system message of first network element, obtains the synchronisation stage of first network element Other and/or Synchronization Status Message.

4. method according to any one of claims 1 to 3, which is characterized in that the initiation is same with first network element Step operation, it is synchronous with first network element, comprising:

The network element to be synchronized according to the synchronization levels and/or synchronous regime of first network element got in system information, Determine itself synchronization levels and/or Synchronization Status Message.

5. the method according to claim 1, wherein the network element to be synchronized is not configured with fortune belonging to the first network element When seeking the client identification module SIM card of quotient, configuration is exclusively used in the synchronous scrambler sequence of the first network element；

When the network element configuration to be synchronized has the client identification module SIM card of the first network element operator, the random access Scrambler sequence random arrangement from scheduled scrambler sequence set.

6. a kind of device of air interface synchronization, which is characterized in that described device includes first listening to unit, the first synchronization unit, the Two listen to unit, acquiring unit, determination unit and synchronous initiation unit；Wherein:

First listens to unit, for listening to the broadcast message and system message of more than one network element of different operator；

First synchronization unit, one in intercepted result and one above network element for listening to unit based on described first First network element carries out frame synchronization；

Second listens to unit, for listening to the system message of first network element；

Acquiring unit, the intercepted result for listening to unit based on described second obtain first network element synchronization levels and/ Or Synchronization Status Message；

Determination unit, for based on first network element synchronization levels and/or Synchronization Status Message determine that network element to be synchronized needs When synchronous, synchronous initiation unit is triggered；

It is synchronous to initiate unit, for initiating and the simultaneously operating of first network element, make the network element to be synchronized and described first Network element is synchronous；

Wherein, the acquiring unit is also obtained and is connect when obtaining the synchronization levels and/or Synchronization Status Message of first network element Enter the random access configuration information to first network element；

The synchronous initiation unit, is also used to initiate behaviour synchronous with first network element based on the random access configuration information Make, it is synchronous with first network element；

Wherein, the random access configuration information includes: the configuration information of the random access scrambler sequence of the first network element and random Access the transmission power information of signal；

Accordingly, the synchronous initiation unit, is also used to the configuration information and random access of the random access scrambler sequence The transmission power of signal to first network element send random access request signal, and receive first network element according to described in The Timing Advance that machine access request signal determines compensates the network element to be synchronized and described first based on the Timing Advance The timing error of network element is completed synchronous with first network element.

7. device according to claim 6, which is characterized in that described device further include:

First load bearing unit, for synchronization levels and/or Synchronization Status Message to be carried in system information block SIB；

Accordingly, described second unit is listened to, is also used to listen to the SIB in the system message of first network element, described in acquisition The synchronization levels and/or Synchronization Status Message of first network element.

8. device according to claim 6, which is characterized in that described device further include:

Second load bearing unit, for synchronization levels and/or Synchronization Status Message to be carried in one SIB1 of system information block；

Accordingly, described second unit is listened to, is also used to listen to the SIB1 in the system message of first network element, described in acquisition The synchronization levels and/or Synchronization Status Message of first network element.

9. according to the described in any item devices of claim 6 to 8, which is characterized in that the synchronous initiation unit is also used to basis The synchronization levels and/or synchronous regime of first network element got in system information determine the same of the network element to be synchronized Walk rank and/or Synchronization Status Message.

10. device according to claim 6, which is characterized in that the network element to be synchronized is not configured with belonging to the first network element When the client identification module SIM card of operator, configuration is exclusively used in the synchronous scrambler sequence of the first network element；

When the network element configuration to be synchronized has the client identification module SIM card of the first network element operator, the random access Scrambler sequence random arrangement from scheduled scrambler sequence set.

11. a kind of communication network element, which is characterized in that the device including the described in any item air interface synchronizations of claim 6 to 10.

12. communication network element according to claim 11, which is characterized in that the communication network element includes base station.