WO2014056190A1

WO2014056190A1 - Synchronization method and communication device

Info

Publication number: WO2014056190A1
Application number: PCT/CN2012/082865
Authority: WO
Inventors: 吴超阳; 黄兴华; 秦圣奕; 吴君怡
Original assignee: 华为技术有限公司
Priority date: 2012-10-12
Filing date: 2012-10-12
Publication date: 2014-04-17
Also published as: CN103109572A

Abstract

Provided are a synchronization method and a communication device. A first communication device sends a synchronization message to a second communication device and records first time information about when the first communication device sends the synchronization message; the first communication device receives a response message sent by the second communication device and records third time information about when the first communication device receives the response message, wherein the response message contains second time information about when the second communication device receives the synchronization message; and the first communication device calculates a time difference between the first communication device and the second communication device according to the first time information, the second time information and the third time information.

Description

Synchronization method and communication device

Technical field

The present application relates to communication technologies, and in particular, to a synchronization method and a communication device. Background technique

In a wireless communication system such as a Wideband Code Division Multiple Access (WCDMA) system, an RNC function can be logically implemented by connecting two Radio Network Controllers (RNCs). For example, a Radio Resource Control (RRC) entity and a Medium Access Control entity handling Dedicated channels (MAC-D) entity are respectively deployed on two RNCs.

However, since the clock sources of the two RNCs may be different, that is, the time of the two RNCs is not synchronized, the RRC entity cannot calculate the correct activation time according to the Connection Frame Number (CFN) provided by the MAC-D entity. This leads to a drop in the accuracy of the activation time, which prevents the business from proceeding normally. A similar problem exists between any other two communication devices. Summary of the invention

Aspects of the present application provide a synchronization method and communication device for implementing time synchronization of two communication devices.

In an aspect of the present application, a synchronization method is provided, including:

The first communication device sends a synchronization message to the second communication device, and records the first time information that the first communication device sends the synchronization message;

The first communication device receives the response message sent by the second communication device, and records the third time information that the first communication device receives the response message, where the response message includes the second communication device receiving Second time information of the synchronization message;

The first communication device obtains a time difference between the first communication device and the second communication device according to the first time information, the second time information, and the third time information.

An aspect as described above and any possible implementation manner further provide an implementation manner, The first time information includes an RFN or a BFN;

The second time information includes an RFN or a BFN;

The third time information includes RFN or BFN.

The foregoing aspect, and any possible implementation manner, further provide an implementation manner, where the sending, by the first communications device, the synchronization message to the second communications device includes:

The first communication device periodically transmits the synchronization message to the second communication device.

The foregoing aspect, and any possible implementation manner, further provide an implementation manner, where the first communications device obtains, according to the first time information, the second time information, and the third time information, After the time difference between the first communication device and the second communication device, the method further includes:

The first communication device synchronizes with the second communication device by using the time difference; or

The first communication device obtains a first average value of the time difference using the time difference obtained this time and at least one of the time differences obtained before, and utilizes the first average value, and the second The communication device is synchronized.

When the difference between the time difference and the second average of the time difference is less than a preset threshold, the first communications device determines that the time difference is a valid value, and the valid value is used by the first communications device Synchronizing with the second communication device; or

When the difference between the time difference and the second average of the time difference is greater than or equal to the threshold, the first communications device determines that the time difference is an invalid value, and the invalid value is not used by the first communications device Used for synchronizing with the second communication device;

The second average value of the time difference is obtained by the first communications device according to at least one of the time differences obtained before this time.

The foregoing aspect, and any possible implementation manner, further provide an implementation manner, after the determining, by the first communications device, that the time difference is a valid value, the method further includes:

The first communication device synchronizes with the second communication device by using the valid value; or By

The first communication device obtains a third average value of the effective value by using the valid value obtained this time and at least one of the valid values obtained before, and using the third average value, The second communication device performs synchronization.

The aspect as described above, and any possible implementation manner, further provide an implementation manner, after the determining, by the first communications device, that the time difference is an invalid value, the method further includes: when the first communications device continuously determines the specified number of And the invalid value, and the difference between any two of the invalid values between the specified number of the invalid values is less than a preset allowable value,

The first communication device synchronizes with the second communication device by using the invalid value; or

The first communication device obtains a fourth average value of the invalid value by using the invalid value obtained this time and at least one of the invalid values obtained before, and using the fourth average value, The second communication device performs synchronization.

In another aspect of the present application, a communication device is provided, including:

a sending unit, configured to send a synchronization message to the second communications device;

a processing unit, configured to record first time information that the sending unit sends the synchronization message, a receiving unit, configured to receive a response message sent by the second communications device, and transmit the response message to the processing unit The response message includes second time information that the second communications device receives the synchronization message;

The processing unit is further configured to record third time information that the receiving unit receives the response message;

The processing unit is further configured to obtain a time difference between the communication device and the second communication device according to the first time information, the second time information, and the third time information.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the first time information includes an RFN or a BFN;

The second time information includes an RFN or a BFN;

The third time information includes RFN or BFN.

The foregoing aspect, and any possible implementation manner, further provide an implementation manner, where the sending unit is specifically used to

The synchronization message is periodically sent to the second communication device. The foregoing aspect and any possible implementation manner further provide an implementation manner, where the processing unit is further used to

Synchronizing with the second communication device using the time difference; or

Using the time difference obtained this time and at least one of the time differences obtained before this time, a first average value of the time difference is obtained, and the first average value is used to synchronize with the second communication device.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the processing unit is further used to

Determining that the time difference is a valid value when the difference between the time difference and the second average value of the time difference is less than a preset threshold, where the valid value is used by the processing unit to perform with the second communication device Synchronous; or

Determining that the time difference is an invalid value when a difference between the time difference and a second average value of the time difference is greater than or equal to the threshold, and the invalid value is not used by the processing unit for the second communication The device synchronizes;

The second average value of the time difference is obtained by the processing unit according to at least one of the time differences obtained before this time.

Synchronizing with the second communication device using the valid value; or

Obtaining a third average value of the effective value by using the effective value obtained this time and at least one of the effective values obtained before, and using the third average value to perform with the second communication device Synchronize.

And the processing unit is further configured to continuously determine a specified number of the invalid values, and the specified number of the invalid values, between the foregoing aspects, and any possible implementation manner. When the difference between any two of the invalid values is less than the preset allowable value,

Synchronizing with the second communication device using the invalid value; or

Obtaining a fourth average value of the invalid value using the invalid value obtained this time and at least one of the invalid values obtained before, and using the fourth average value to perform with the second communication device Synchronize. In another aspect of the present application, a communication device is provided, including:

a transmitter, configured to send a synchronization message to the second communications device;

a processor, configured to record first time information that the transmitter sends the synchronization message, a receiver, configured to receive a response message sent by the second communication device, and transmit the response message to the processor The response message includes second time information that the second communications device receives the synchronization message;

The processor is further configured to record third time information that the receiver receives the response message, where the processor is further configured to use, according to the first time information, the second time information, and the The three time information obtains a time difference between the communication device and the second communication device.

The second time information includes an RFN or a BFN;

The third time information includes RFN or BFN.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the transmitter is specifically used to

The synchronization message is periodically sent to the second communication device.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the processor is further used to

Determining that the time difference is a valid value when the difference between the time difference and the second average value of the time difference is less than a preset threshold, the valid value being used by the processor to synchronize with the second communication device ; or

Determining that the time difference is an invalid value when a difference between the time difference and a second average value of the time difference is greater than or equal to the threshold, and the invalid value is not used by the processor for use with the second communication device Synchronize; The second average of the time differences is obtained by the processor according to at least one of the time differences obtained before.

Synchronizing with the second communication device using the valid value; or

An aspect as described above, and any possible implementation, further providing an implementation, where the processor is further configured to continuously determine a specified number of the invalid values, and between the specified number of the invalid values If the difference between any two of the invalid values is less than a preset allowable value, the invalid value is used to synchronize with the second communication device; or

Obtaining a fourth average value of the invalid value using the invalid value obtained this time and at least one of the invalid values obtained before, and using the fourth average value to perform with the second communication device Synchronize.

According to the foregoing technical solution, the embodiment of the present application sends a synchronization message to the second communication device by using the first communication device, and records the first time information that the first communication device sends the synchronization message, and further receives the second communication. a response message sent by the device, and recording third time information that the first communication device receives the response message, where the response message includes second time information that the second communication device receives the synchronization message, so that The first communication device is configured to obtain a time difference between the first communication device and the second communication device according to the first time information, the second time information, and the third time information, thereby implementing Time synchronization of two communication devices. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a schematic flowchart of a synchronization method according to an embodiment of the present application;

2 is a schematic structural diagram of a communication device according to another embodiment of the present application; FIG. 3 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure. The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. The embodiments are part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

The technical solution of the present application can be applied to various communication systems, for example, Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS) system, and code division multiple access (Code) Division Multiple Access (CDMA) system, CDMA2000 system, Wideband Code Division Multiple Access (WCDMA) system, Long Term Evolution (LTE) system or Worldwide Interoperability for Microwave Access, WiMAX) systems, etc.

The base station control device may be a base station controller (BSC) in a GSM system, a GPRS system or a CDMA system, or a radio network controller (RNC) in a CDMA2000 system or a WCDMA system. It may be an Evolved NodeB (eNodeB) in the LTE system, or may be a network element such as an Access Service Network Base Station (ASN BS) in the WiMAX network.

The base station may be a base station (Base Transceiver Station, BTS) in a GSM system, a GPRS system or a CDMA system, or may be a base station (NodeB) in a CDMA2000 system or a WCDMA system, or may be an evolved base station in an LTE system (Evolved) The NodeB, eNodeB) may also be a network element such as an Access Service Network Base Station (ASN BS) in the WiMAX network.

In addition, the term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate: A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "," in this article, generally means that the contextual object is an "or" relationship. FIG. 1 is a schematic flowchart of a synchronization method according to an embodiment of the present disclosure, as shown in FIG. 1.

101. The first communications device sends a synchronization message to the second communications device, and records the first time information that the first communications device sends the synchronization message.

102. The first communications device receives a response message sent by the second communications device, and records third time information that the first communications device receives the response message, where the response message includes the second communications The device receives the second time information of the synchronization message.

103. The first communications device obtains a time difference between the first communications device and the second communications device according to the first time information, the second time information, and the third time information.

It should be noted that the first communication device or the second communication device may be a base station control device, or may be a base station, which is not limited in this embodiment.

In order to make the method provided by the embodiment of the present application more clear, the first time information, the second time information, and the third time information will be described in detail by taking a WCDMA system as an example. When the first communication device and the second communication device are both RNCs, the first time information, the second time information, and the third time information are radio network controller frame numbers (Radio Network Controller The first time information, the second time information, and the third time information are NodeB frame numbers when the first communication device and the second communication device are both NodeBs ( The first time information and the third time information are RFNs, and the second time information is when the first communication device is an RNC and the second communication device is a NodeB. When the first communication device is a NodeB, and the second communication device is an RNC, the first time information and the third time information are BFN, and the second time information is an RFN.

Specifically, in 103, the first communications device may be specifically according to a formula:

Time difference = first time information + (third time information - first time information) / 2 - second time information, obtaining a time difference between the first communication device and the second communication device.

Optionally, in a possible implementation manner of this embodiment, in 101, the first communications device may periodically send the synchronization message to the second communications device, for example, the period is 10 milliseconds (ms).

Optionally, in a possible implementation manner of this embodiment, after the first communications device, the first communications device may further utilize the time difference to synchronize with the second communications device.

Optionally, in a possible implementation manner of this embodiment, after 103, the first pass The signaling device may further utilize the time difference obtained this time and at least one of the time differences obtained before this time to obtain a first average value of the time difference, and utilize the first average value to communicate with the second communication The device is synchronized.

Optionally, in a possible implementation manner of this embodiment, after 103, when the difference between the time difference and the second average value of the time difference is less than a preset threshold, the first communications device may Determining that the time difference is a valid value, the valid value being used by the first communication device to synchronize with the second communication device; or when a difference between the time difference and a second average of the time difference is greater than or When the threshold is equal to the threshold, the first communications device may determine that the time difference is an invalid value, that is, the transmission delay of the network generates jitter, and the invalid value is not used by the first communications device. Synchronizing with the second communication device.

The second average value of the time difference is obtained by the first communications device according to at least one of the time differences obtained before.

For example, after the first communication device determines that the time difference is a valid value, the first communication device may further synchronize with the second communication device by using the valid value.

For example, after the first communications device determines that the time difference is a valid value, the first communications device may further utilize the valid value obtained this time and at least one of the valid values obtained before. Obtaining a third average of the rms values and synchronizing with the second communication device using the third average.

For another example, after the first communications device determines that the time difference is an invalid value, when the first communications device continuously determines a specified number of the invalid values, and any two of the specified number of the invalid values If the difference between the invalid values is less than the preset allowable value, that is, when the transmission delay of the network changes, the first communication device may further utilize the invalid value, and The second communication device performs synchronization.

For another example, after the first communications device determines that the time difference is an invalid value, when the first communications device continuously determines a specified number of the invalid values, and any two of the specified number of the invalid values If the difference between the invalid values is less than the preset allowable value, that is, when the transmission delay of the network changes, the first communication device may further utilize the obtained Invalid value and at least one of the invalid values obtained before this time, obtaining the invalid A fourth average of the values, and synchronizing with the second communication device using the fourth average. Taking the WCDMA system as an example, the first communication device is assumed to be the RNC A, and the RRC entity is deployed on the RNC A, the second communication device is the RNC B, and the MAC-D entity is deployed on the RNC B. With the technical solution provided by this embodiment, RNC A can obtain the time difference between RNC A and RNC B. After the RNC A obtains the time difference between the RNC A and the RNC B, the RNC A may further convert the unit of the time difference into a Connection Frame Number (CFN) and can utilize the time difference after the conversion unit The CFN provided by the RNC B calculates an accurate activation time, so that the service can be performed normally. For example, the RRC entity deployed on the RNC A configures the activation time to the MAC-D entity deployed on the RNC B, and the RRC entity deployed on the RNC A sends a radio bearer setup (RRC_RB_SETUP) message to the terminal, the radio bearer setup message. The activation time is included in it.

In this embodiment, the first communication device sends a synchronization message to the second communication device, and records the first time information that the first communication device sends the synchronization message, and further receives the response message sent by the second communication device. And recording the third time information that the first communications device receives the response message, where the response message includes the second time information that the second communications device receives the synchronization message, so that the first communications device Obtaining a time difference between the first communication device and the second communication device according to the first time information, the second time information, and the third time information, thereby implementing two communication devices Time synchronization.

It should be noted that, for the foregoing method embodiments, for the sake of brevity, they are all described as a series of action combinations, but those skilled in the art should understand that the present application is not limited by the described action sequence. Because in accordance with the present application, certain steps may be performed in other orders or concurrently. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

FIG. 2 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure. As shown in FIG. 2, the communication device in this embodiment may include a sending unit 21, a processing unit 22, and a receiving unit 23. The sending unit 21 is configured to send a synchronization message to the second communications device, the processing unit 22 is configured to record the first time information that the sending unit 21 sends the synchronization message, and the receiving unit 23 is configured to receive the a response message sent by the communication device, and transmitting the response message to the The processing unit 22, the response message includes second time information that the second communication device receives the synchronization message, and the processing unit 22 is further configured to record, by the receiving unit 23, the third message that receives the response message. The processing unit 22 is further configured to obtain, according to the first time information, the second time information, and the third time information, a time difference between the communication device and the second communication device. .

It should be noted that the communication device or the second communication device may be a base station control device, or may be a base station, which is not limited in this embodiment.

In order to make the method provided by the embodiment of the present application more clear, the first time information, the second time information, and the third time information will be described in detail by taking a WCDMA system as an example. When the communication device and the second communication device are both RNCs, the first time information, the second time information, and the third time information are radio network controller frame numbers (Radio Network Controller Frame Number) The first time information, the second time information, and the third time information are NodeB frame numbers (NodeB Frame Number, when the communication device and the second communication device are both NodeBs). BFN); when the communication device is an RNC, and the second communication device is a NodeB, the first time information and the third time information are RFN, and the second time information is BFN; When the communication device is a NodeB, and the second communication device is an RNC, the first time information and the third time information are BFN, and the second time information is an RFN.

Optionally, in a possible implementation manner of the embodiment, the sending unit 21 may periodically send the synchronization message to the second communications device, for example, the period is 10 milliseconds (ms).

Optionally, in a possible implementation manner of the embodiment, the processing unit 22 may further utilize the time difference to synchronize with the second communications device.

Optionally, in a possible implementation manner of the embodiment, the processing unit 22 may further obtain the first time difference by using the time difference obtained this time and the at least one time difference obtained before. An average value, and synchronizing with the second communication device using the first average value.

Optionally, in a possible implementation manner of the embodiment, the processing unit 22 may further determine the time difference when a difference between the time difference and a second average value of the time difference is less than a preset threshold. The valid value is used by the processing unit 22 to synchronize with the second communication device. The second average of the time differences is obtained by the processing unit 22 according to at least one of the time differences obtained before.

Optionally, in a possible implementation manner of the embodiment, the processing unit 22 may further determine that the difference between the time difference and the second average value of the time difference is greater than or equal to the threshold value. The time difference is an invalid value that is not used by the processing unit 22 to synchronize with the second communication device;

The second average of the time differences is obtained by the processing unit 22 according to at least one of the time differences obtained before.

For example, the processing unit 22 may further utilize the valid value to synchronize with the second communication device.

For example, the processing unit 22 may further obtain the third average value of the effective value by using the valid value obtained this time and at least one of the valid values obtained before, and using the third The average value is synchronized with the second communication device.

For another example, the processing unit 22 continuously determines a specified number of the invalid values, and the difference between any two of the invalid values between the specified number of the invalid values is less than a preset allowable value. And, the invalid value may be further utilized to synchronize with the second communication device.

For another example, the processing unit 22 continuously determines a specified number of the invalid values, and the difference between any two of the invalid values between the specified number of the invalid values is less than a preset allowable value. And obtaining, by using the invalid value obtained this time and at least one of the invalid values obtained before, obtaining a fourth average value of the invalid value, and using the fourth average value, The second communication device performs synchronization.

The communication device is used to perform the method corresponding to the embodiment shown in FIG. 1. For the details already described in the embodiment shown in FIG. 1, details are not described herein again.

In this embodiment, the communication device sends a synchronization message to the second communication device by using the sending unit, and the processing unit records the first time information that the sending unit sends the synchronization message, and then the receiving unit receives the second communication device. Sending a response message, and the processing unit records third time information that the receiving unit receives the response message, where the response message includes second time information that the second communication device receives the synchronization message, Enabling the processing unit to obtain a time difference between the communication device and the second communication device according to the first time information, the second time information, and the third time information, thereby implementing two Time synchronization of communication devices. FIG. 3 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure. As shown in FIG. 3, the communication device of this embodiment may include a transmitter 31, a processor 32, and a receiver 33. The transmitter 31 is configured to send a synchronization message to the second communication device, the processor 32 is configured to record the first time information that the transmitter 31 sends the synchronization message, and the receiver 33 is configured to receive the a response message sent by the communication device, and transmitting the response message to the processor 32, where the response message includes second time information that the second communication device receives the synchronization message; And the third time information that is received by the receiver 33 to receive the response message; the processor 32 is further configured to use, according to the first time information, the second time information, and the third time Information, obtaining a time difference between the communication device and the second communication device.

Optionally, in a possible implementation manner of the embodiment, the transmitter 31 may periodically send the synchronization message to the second communications device, for example, the period is 10 milliseconds (ms).

Optionally, in a possible implementation manner of the embodiment, the processor 32 may further synchronize with the second communications device by using the time difference.

Optionally, in a possible implementation manner of the embodiment, the processor 32 may further obtain the first time difference by using the time difference obtained this time and the at least one time difference obtained before. An average value, and synchronizing with the second communication device using the first average value. Optionally, in a possible implementation manner of the embodiment, the processor 32 may further determine the difference between the time difference and the second average value of the time difference, when the threshold is preset. The time difference is a valid value that is used by the processor 32 to synchronize with the second communication device.

The second average of the time differences is obtained by the processor 32 based on at least one of the time differences previously obtained.

Optionally, in a possible implementation manner of the embodiment, the processor 32 may further determine that the difference between the time difference and the second average value of the time difference is greater than or equal to the threshold value. The time difference is an invalid value that is not used by the processor 32 to synchronize with the second communication device;

For example, the processor 32 can further synchronize with the second communication device by using the valid value.

For example, the processor 32 may further obtain the third average value of the effective value by using the valid value obtained this time and at least one of the valid values obtained before, and using the third The average value is synchronized with the second communication device.

For another example, the processor 32 continuously determines a specified number of the invalid values, and the difference between any two of the invalid values between the specified number of the invalid values is less than a preset allowable value. And, the invalid value may be further utilized to synchronize with the second communication device.

For another example, the processor 32 continuously determines a specified number of the invalid values, and the difference between any two of the invalid values between the specified number of the invalid values is less than a preset allowable value. And obtaining, by using the invalid value obtained this time and at least one of the invalid values obtained before, obtaining a fourth average value of the invalid value, and using the fourth average value, The second communication device performs synchronization.

In this embodiment, the communication device sends a synchronization message to the second communication device by using the transmitter, and the processor records the first time information that the transmitter sends the synchronization message, and then the second communication device is received by the receiver. a response message sent, and the receiver receives the receiver reception a third time information of the response message, where the response message includes second time information that the second communication device receives the synchronization message, so that the processor can be configured according to the first time information, The second time information and the third time information obtain a time difference between the communication device and the second communication device, thereby implementing time synchronization of the two communication devices.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a communication device, etc.) or a processor to execute the method of the various embodiments of the present application. Part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a Read-Only Memory (ROM), a random access memory (RAM), a disk or an optical disk, and the like, which can store program codes. .

Finally, it should be noted that the above embodiments are only used to explain the technical solutions of the present application, rather than Restrictions; Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced; The modifications and substitutions of the present invention do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

claims

1. A synchronization method, characterized by including:

The first communication device sends a synchronization message to the second communication device, and records the first time information when the first communication device sends the synchronization message;

The first communication device receives the response message sent by the second communication device, and records the third time information when the first communication device receives the response message, and the response message includes the response message received by the second communication device. The second time information of the synchronization message;

The first communication device obtains the time difference between the first communication device and the second communication device based on the first time information, the second time information and the third time information.

2. The method according to claim 1, characterized in that,

The first time information includes RFN or BFN;

The second time information includes RFN or BFN;

The third time information includes RFN or BFN.

3. The method according to claim 1 or 2, characterized in that the first communication device sends a synchronization message to the second communication device, including:

The first communication device periodically sends the synchronization message to the second communication device.

4. The method according to any one of claims 1 to 3, characterized in that, the first communication device obtains according to the first time information, the second time information and the third time information. After the time difference between the first communication device and the second communication device, the method further includes: using the time difference, the first communication device synchronizes with the second communication device; or

The first communication device uses the time difference obtained this time and at least one time difference obtained before this time to obtain a first average value of the time difference, and uses the first average value to compare with the second time difference. Communication devices are synchronized.

5. The method according to any one of claims 1 to 4, characterized in that, the first communication device obtains according to the first time information, the second time information and the third time information. After the time difference between the first communication device and the second communication device, it also includes: when the difference between the time difference and the second average value of the time difference is less than a preset threshold, the first communication The device determines that the time difference is a valid value, and the valid value is used by the first communication device to synchronize with the second communication device; or When the difference between the time difference and the second average value of the time difference is greater than or equal to the threshold, the first communication device determines that the time difference is an invalid value, and the invalid value is not used by the first communication device. For synchronizing with the second communication device;

Wherein, the second average value of the time difference is obtained by the first communication device based on at least one of the time differences obtained before this time.

6. The method according to claim 5, characterized in that, after the first communication device determines that the time difference is a valid value, it further includes:

The first communication device uses the effective value to synchronize with the second communication device; or

The first communication device uses the effective value obtained this time and at least one effective value obtained before this time to obtain a third average value of the effective value, and uses the third average value, and the The second communication device performs synchronization.

7. The method according to claim 5, characterized in that, after the first communication device determines that the time difference is an invalid value, it further includes: when the first communication device continuously determines a specified number of invalid values, And the difference between any two invalid values among the specified number of invalid values is less than the preset allowed value, when,

The first communication device uses the invalid value to synchronize with the second communication device; or

The first communication device uses the invalid value obtained this time and at least one invalid value obtained before this time to obtain a fourth average value of the invalid value, and uses the fourth average value, and the The second communication device performs synchronization.

8. A communication device, characterized by including:

A sending unit, configured to send a synchronization message to the second communication device;

A processing unit, configured to record the first time information of the synchronization message sent by the sending unit; a receiving unit, configured to receive the response message sent by the second communication device, and transmit the response message to the processing unit , the response message includes second time information when the second communication device receives the synchronization message;

The processing unit is also configured to record the third time information when the receiving unit receives the response message;

The processing unit is also configured to perform the processing according to the first time information, the second time information and the The third time information is used to obtain the time difference between the communication device and the second communication device.

9. The communication device according to claim 8, characterized in that,

The first time information includes RFN or BFN;

The second time information includes RFN or BFN;

The third time information includes RFN or BFN.

10. The communication device according to claim 8 or 9, characterized in that the sending unit is specifically used to

11. The communication device according to any one of claims 8 to 10, characterized in that the processing unit is also used to

Using the time difference, synchronize with the second communication device; or

Using the time difference obtained this time and at least one time difference obtained before this time, obtain a first average value of the time difference, and use the first average value to synchronize with the second communication device.

12. The communication device according to any one of claims 8 to 11, characterized in that, the processing unit is also used to

When the difference between the time difference and the second average value of the time difference is less than a preset threshold, the time difference is determined to be a valid value, and the valid value is used by the processing unit to communicate with the second communication device sync; or

When the difference between the time difference and the second average value of the time difference is greater than or equal to the threshold, it is determined that the time difference is an invalid value, and the invalid value is not used by the processing unit to communicate with the second Devices are synchronized;

Wherein, the second average value of the time difference is obtained by the processing unit based on at least one of the time differences obtained before this time.

13. The communication device according to claim 12, characterized in that the processing unit is also used to

Using the valid value, synchronize with the second communication device; or

Using the effective value obtained this time and at least one effective value obtained before this time, obtain a third average value of the effective value, and use the third average value to communicate with the second communication device Synchronize.

14. The communication device according to claim 12, wherein the processing unit is further configured to determine a specified number of invalid values continuously, and any two of the invalid values between the specified number The difference between the above invalid values is less than the preset allowed value, when

Using the invalid value, synchronize with the second communication device; or

Using the invalid value obtained this time and at least one invalid value obtained before this time, obtain a fourth average value of the invalid value, and use the fourth average value to communicate with the second communication device Synchronize.

15. A communication device, characterized by including:

A transmitter, used to send a synchronization message to the second communication device;

A processor, configured to record the first time information when the sender sends the synchronization message; a receiver, configured to receive a response message sent by the second communication device, and transmit the response message to the processor , the response message includes second time information when the second communication device receives the synchronization message;

The processor is further configured to record the third time information when the receiver receives the response message; the processor is further configured to record the third time information according to the first time information, the second time information and the third time information. Three time information, obtain the time difference between the communication device and the second communication device.

16. The communication device according to claim 15, characterized in that,

The first time information includes RFN or BFN;

The second time information includes RFN or BFN;

The third time information includes RFN or BFN.

17. The communication device according to claim 15 or 16, characterized in that the transmitter is specifically used for

18. The communication device according to any one of claims 15 to 17, characterized in that the processor is also used to

Using the time difference, synchronize with the second communication device; or

19. The communication device according to any one of claims 15 to 18, characterized in that, The processor is also used to

When the difference between the time difference and the second average value of the time difference is less than a preset threshold, the time difference is determined to be a valid value, and the valid value is used by the processor to synchronize with the second communication device ; or

When the difference between the time difference and the second average value of the time difference is greater than or equal to the threshold, it is determined that the time difference is an invalid value, and the invalid value is not used by the processor to communicate with the second communication device perform synchronization;

Wherein, the second average value of the time difference is obtained by the processor based on at least one of the time differences obtained before this time.

20. The communication device according to claim 19, characterized in that the processor is also used to

Using the valid value, synchronize with the second communication device; or

21. The communication device according to claim 20, wherein the processor is further configured to determine a specified number of invalid values continuously, and any two of the invalid values between the specified number The difference between the above invalid values is less than the preset allowed value, when

Using the invalid value, synchronize with the second communication device; or