CN116782365A

CN116782365A - Time synchronization method, device, computer equipment and storage medium

Info

Publication number: CN116782365A
Application number: CN202310908580.3A
Authority: CN
Inventors: 胡乐东; 张会炎; 谢晓军; 薛龙; 黄泽源
Original assignee: China Telecom Technology Innovation Center; China Telecom Corp Ltd
Current assignee: China Telecom Technology Innovation Center; China Telecom Corp Ltd
Priority date: 2023-07-24
Filing date: 2023-07-24
Publication date: 2023-09-19

Abstract

The application discloses a time synchronization method, a time synchronization device, computer equipment and a storage medium. The method can be applied to the technical field of network communication, and specifically comprises the following steps: receiving a first time synchronization message sent by a master clock device of a private network, forwarding the first time synchronization message to a target terminal device of the private network, receiving a second time synchronization message carrying first time information sent by the master clock device of the private network, and adding second time information in the second time synchronization message, wherein the first time information is the time of the master clock device sending the first time synchronization message, the second time information comprises the residence time of the first time synchronization message at a 5G analog TSN bridge, and forwarding the second time synchronization message added with the second time information to the target terminal device for the target terminal device to perform time correction based on the first time information and the second time information in the second time synchronization message, and keeping time synchronization with the master clock device.

Description

Time synchronization method, device, computer equipment and storage medium

Technical Field

The present application relates to the field of network communications technologies, and in particular, to a time synchronization method, apparatus, computer device, and storage medium.

Background

The private network refers to a communication network formulated by a user according to own needs. For example, customized networks based on Time sensitive networks and 5G networks, where Time sensitive networks (Time-Sensitive Networking, TSNs) refer to networks that guarantee the quality of service of delay sensitive flows, achieving low delay, low jitter, and zero packet loss.

The time sensitive network of the private network is usually matched with a public 5G network in the use process, but because the 5G network and the time sensitive network are provided with respective clocks, when the time sensitive network is matched with the 5G network, the problem that the time of the TSN terminal equipment is deviated from the time of the TSN master clock equipment (GM) is easily caused, and a corresponding time synchronization method is lacking at present.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a synchronization method, apparatus, computer device, and storage medium that can accurately correct the time of a target terminal device so that the time is kept in synchronization with a TSN master clock device.

In a first aspect, the present application provides a time synchronization method applied to a 5G analog TSN bridge, the method comprising:

receiving a first time synchronization message sent by a master clock device of a private network, and forwarding the first time synchronization message to a target terminal device of the private network;

Receiving a second time synchronization message carrying first time information sent by a master clock device of a private network, and adding the second time information into the second time synchronization message; the first time information is the time of the master clock device to send the first time synchronization message; the second time information comprises residence time of the first time synchronization message at the 5G analog TSN bridge;

and forwarding a second time synchronization message added with second time information to the target terminal equipment, wherein the second time synchronization message is used for the target terminal equipment to perform time synchronization with the master clock equipment based on the first time information and the second time information.

In one embodiment, the residence time includes a time of receipt and a time of forwarding of the first time synchronization message.

In one embodiment, the 5G analog TSN bridge includes a first TSN converter, a UPF network element, a RAN network element, a terminal UE, and a second TSN converter connected in sequence;

adding second time information in a second time synchronization message, including:

the receiving time of the first time synchronization message is added to the second time synchronization message through the first TSN converter, and then the second time synchronization message is transmitted to the UPF network element;

transmitting a second time synchronization message added with the receiving time of the first time synchronization message to a second TSN converter through a UPF network element, a RAN network element and a terminal UE in sequence;

And adding the forwarding time of the first time synchronization message into the second time synchronization message through the second TSN converter.

In one embodiment, the time of receiving the first time synchronization packet is the time of receiving the first time packet by the first TSN converter; the forwarding time of the first time synchronization message is the time when the second TSN converter forwards the second time message to the target device.

In one embodiment, the second time information further includes: a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device.

In one embodiment, the method further comprises:

the method comprises the steps of sending a first delay measurement message to target terminal equipment, wherein the first delay measurement message is used for indicating the target terminal equipment to feed back a second delay measurement message to a 5G simulation TSN bridge after receiving the first delay measurement message; the second delay measurement message carries the receiving time of the target terminal equipment for receiving the first delay measurement message and the sending time of the second delay measurement message;

receiving a second delay measurement message fed back by the target terminal equipment;

and determining the second delay according to the sending time of the first delay measurement message, the receiving time of the target terminal equipment to the first delay measurement message, the receiving time of the 5G analog TSN bridge to the second delay measurement message, and the sending time of the second delay measurement message.

In one embodiment, forwarding the first time synchronization message to a target terminal device of the private network includes:

determining target terminal equipment from candidate equipment of a private network according to a clock domain number carried by the first time synchronization message;

and forwarding the first time synchronization message to the target terminal equipment.

In a second aspect, the present application provides a time synchronization method, applied to a target terminal device of a private network, where the method includes:

receiving a first time synchronization message forwarded by a 5G analog TSN bridge;

receiving a second time synchronization message forwarded by a 5G analog TSN bridge; the first time synchronization message and the second time synchronization message are sent to a 5G simulation TSN bridge by a main clock device of a private network; the second time synchronization message carries first time information and second time information; the first time information is the time added by the master clock device when the master clock device transmits a first time synchronization message; the second time information is residence time of the first time synchronization message added by the 5G analog TSN bridge at the 5G analog TSN bridge;

and carrying out time synchronization with the master clock device according to the first time information, the second time information and the actual time of locally receiving the first time synchronization message.

In one embodiment, according to the first time information and the second time information, and the actual time of receiving the first time synchronization message locally, performing time synchronization with the master clock device, including:

determining the time consumption of transmission of the first time synchronization message according to the residence time, the first time delay and the second time delay in the second time information;

determining the expected time of locally receiving the first time synchronization message according to the first time information and the time consumption of the transmission of the first time synchronization message;

and carrying out time synchronization with the master clock device according to the expected time and the actual time of locally receiving the first time synchronization message.

In one embodiment, the method further comprises:

receiving a first delay measurement message sent by a 5G analog TSN bridge; the first delay measurement message carries the sending time of the first delay measurement message;

feeding back a second delay measurement message to the 5G analog TSN bridge; the second delay measurement message carries the receiving time of the first delay measurement message and the sending time of the second delay measurement message; the first delay measurement message and the second delay measurement message are used for indicating the 5G analog TSN bridge to determine the second delay based on the sending time and the receiving time of the first delay measurement message, the receiving time of the second delay measurement message by the 5G analog TSN bridge, and the sending time of the second delay measurement message.

In a third aspect, the present application also provides a time synchronization apparatus applied to a 5G analog TSN bridge, the apparatus comprising:

the first receiving module is used for receiving a first time synchronization message sent by a main clock device of the private network and forwarding the first time synchronization message to a target terminal device of the private network;

the adding module is used for receiving a second time synchronization message carrying the first time information sent by the master clock equipment of the private network and adding the second time information into the second time synchronization message; the first time information is the time of the master clock device to send the first time synchronization message; the second time information comprises residence time of the first time synchronization message at the 5G analog TSN bridge;

and the forwarding module is used for forwarding a second time synchronization message added with second time information to the target terminal equipment, wherein the second time synchronization message is used for the target terminal equipment to perform time synchronization with the master clock equipment based on the first time information and the second time information.

In a fourth aspect, the present application further provides a time synchronization apparatus, applied to a target terminal device of a private network, where the apparatus includes:

the second receiving module is used for receiving the first time synchronization message forwarded by the 5G analog TSN bridge;

The third receiving module is used for receiving a second time synchronization message forwarded by the 5G analog TSN bridge; the first time synchronization message and the second time synchronization message are sent to a 5G simulation TSN bridge by a main clock device of a private network; the second time synchronization message carries first time information and second time information; the first time information is the time added by the master clock device when the master clock device transmits a first time synchronization message; the second time information is residence time of the first time synchronization message added by the 5G analog TSN bridge at the 5G analog TSN bridge;

and the time synchronization module is used for carrying out time synchronization with the master clock equipment according to the first time information, the second time information and the actual time of the local receiving first time synchronization message.

In a fifth aspect, the present application also provides a computer device comprising a memory and a processor, the memory storing a computer program, the processor executing the computer program to perform the steps of:

In a sixth aspect, the present application also provides a computer device comprising a memory and a processor, the memory storing a computer program, the processor executing the computer program to perform the steps of:

In a seventh aspect, the present application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:

In an eighth aspect, the present application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:

In a ninth aspect, the application also provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of:

In a tenth aspect, the application also provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of:

The time synchronization method, the device, the computer equipment and the storage medium are applied to the 5G analog TSN bridge, the first time synchronization message sent by the master clock equipment of the private network is received, the first time synchronization message is forwarded to the target terminal equipment of the private network, the second time synchronization message carrying first time information and sent by the master clock equipment of the private network is received, and second time information is added in the second time synchronization message, wherein the first time information is the time of the master clock equipment sending the first time synchronization message, the second time information comprises the residence time of the first time synchronization message at the 5G analog TSN bridge, the second time synchronization message added with the second time information is forwarded to the target terminal equipment, and the target terminal equipment performs time correction based on the first time information and the second time information in the second time synchronization message and keeps time synchronization with the master clock equipment.

Drawings

Fig. 1 is an application environment diagram of a time synchronization method provided in this embodiment;

fig. 2 is a flowchart of a first time synchronization method according to the present embodiment;

fig. 3 is a schematic diagram of an operating time domain principle of the time synchronization method provided in the present embodiment;

Fig. 4 is a schematic diagram of a configuration management principle of a 5G analog TSN bridge according to the present embodiment;

fig. 5 is a schematic flow chart of a first method for determining a second delay according to the present embodiment;

fig. 6 is a schematic flow chart of determining a first delay according to the present embodiment;

fig. 7 is a flowchart of a second time synchronization method according to the present embodiment;

fig. 8 is a flowchart of a third time synchronization method according to the present embodiment;

fig. 9 is a schematic flow chart of a second determination of a second delay according to the present embodiment;

fig. 10 is a signaling interaction diagram of a 5G analog TSN bridge and a target terminal device provided in this embodiment;

fig. 11 is a schematic diagram of a time synchronization method according to the present embodiment;

fig. 12 is a block diagram of a first time synchronization apparatus according to the present embodiment;

fig. 13 is a block diagram of a second time synchronization device according to the present embodiment;

fig. 14 is an internal structural diagram of the computer device provided in the present embodiment.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

The time synchronization method provided by the embodiment of the application can be applied to an application environment shown in fig. 1. The 5G analog TSN bridge 104 receives a first time synchronization message sent by the master clock device 102 of the private network, and forwards the first time synchronization message to the target terminal device 106,5G of the private network, and the 5G analog TSN bridge 104 receives a second time synchronization message carrying first time information sent by the master clock device 102 of the private network, and adds second time information to the second time synchronization message; the first time information is the time of a first time synchronization message sent by the master clock device; the second time information includes a residence time of the first time synchronization message at the 5G analog TSN bridge 104, and the 5G analog TSN bridge 104 forwards a second time synchronization message added with the second time information to the target terminal device 106, where the second time synchronization message is used for the target terminal device 106 to perform time synchronization with the master clock device 102 based on the first time information and the second time information.

The private network in the embodiment of the present application may be a time sensitive network TSN, the master clock device may be a TSN master clock device, and the target terminal device may be a TSN terminal station. The 5G simulation TSN bridge is a TSN bridge obtained by simulation of communication equipment based on a fifth generation communication technology, namely, the function of the TSN bridge is realized by utilizing the 5G communication equipment, and the time synchronization of TSN master clock equipment and target terminal equipment in a special network can be realized while normal data communication is realized by utilizing the 5G communication equipment. The 5G communication devices in the 5G analog TSN bridge in this embodiment include, but are not limited to, UPF network elements, RAN network elements, terminal UE, and the like.

In one embodiment, fig. 2 is a flowchart of a time synchronization method according to an embodiment of the present application, and the method is applied to the 5G analog TSN bridge in fig. 1, and the method includes the following steps:

s201, receiving a first time synchronization message sent by a master clock device of the private network, and forwarding the first time synchronization message to a target terminal device of the private network.

The private network of the present application refers to a private network that merges a Time sensitive network (Time-Sensitive Networking, TSN) and a 5G communication network. The Master clock device refers to a Master clock (GM) in a TSN network. The first time synchronization message refers to that in order to enable the master clock device to realize time synchronization with the target terminal device, the master clock device needs to send two time synchronization messages to the slave clock device, wherein the first time synchronization message is a time synchronization message sent first in the two time synchronization messages, and the second time synchronization message is a time synchronization message sent later in the two time synchronization messages; the first time synchronization message may be, but not limited to, a Sync (SYNchronous Communication ) message, and the second time synchronization message may be, but not limited to, a follow_up message.

S202, receiving a second time synchronization message carrying first time information sent by a master clock device of the private network, and adding the second time information in the second time synchronization message. The first time information is the time of the master clock device to send the first time synchronization message; the second time information includes a residence time of the first time synchronization message at the 5G analog TSN bridge.

Optionally, in this embodiment, an identification field (e.g., a correction field) is set in advance in the second time synchronization packet, and after receiving the second time synchronization packet carrying the first time information sent by the master clock device of the private network, the second time information is added in the identification field of the second time synchronization packet.

S203, forwarding a second time synchronization message added with second time information to the target terminal equipment, wherein the second time synchronization message is used for the target terminal equipment to perform time synchronization with the master clock equipment based on the first time information and the second time information.

The target terminal device refers to a TSN terminal station in a time sensitive network, also called slave clock device.

Optionally, in this embodiment, the second time synchronization packet added with the second time information is forwarded to the target terminal device, so that the target terminal device may analyze the second time synchronization packet to obtain the first time information and the second time information, and since the first time information indicates a time when the master clock device sends the first time synchronization packet, the second time information indicates a residence time of the first time synchronization packet at the 5G analog TSN bridge, and the target terminal device may determine, based on the first time information, a target receiving time when the target terminal device receives the first time synchronization packet, where the target terminal device may compare the target receiving time with an actual receiving time, and if the first time information indicates a time when the master clock device sends the first time synchronization packet, calculate a time difference between the target receiving time and the actual receiving time, and correct the time of the target terminal device based on the time difference, so that the target terminal device and the master clock device perform time synchronization. The actual receiving time refers to the actual time of the target terminal device receiving the first time synchronization message.

The embodiment is applied to a 5G analog TSN bridge, and is used for receiving a first time synchronization message sent by a master clock device of a private network, forwarding the first time synchronization message to a target terminal device of the private network, receiving a second time synchronization message carrying first time information sent by the master clock device of the private network, and adding second time information in the second time synchronization message, wherein the first time information is the time of the master clock device sending the first time synchronization message, the second time information comprises the residence time of the first time synchronization message at the 5G analog TSN bridge, and forwarding the second time synchronization message added with the second time information to the target terminal device for the target terminal device to perform time correction based on the first time information and the second time information in the second time synchronization message, and keeping time synchronization with the master clock device.

In one embodiment, the residence time includes a receiving time and a forwarding time of the first time synchronization packet, and an alternative implementation manner of the 5G analog TSN bridge is as follows:

optionally, in this embodiment, the 5G analog TSN bridge includes a first TSN converter, a UPF network element, a RAN network element, a terminal UE, and a second TSN converter that are sequentially connected.

The first TSN converter and the second TSN converter are both TSN converters, and the TSN converters are used for mutual conversion between the 5G protocol and information and the TSN protocol and information. The UPF (User Plane Function ) network element is the main function of the data forwarding from the base station to the network, and is the only module in the core network for processing data, and the rest of the modules are all for processing signaling, i.e. for network control. The 5G core network is thoroughly separated from the user plane, namely, the user plane module only processes data, and the control plane module only is responsible for realizing network management and control. The RAN (Radio Access Network ) network element has the main function of controlling the UE to access the mobile communication network via radio. A terminal UE (User Equipment) User Equipment (UE) refers to a device in a wireless network that enables a User to communicate via a wireless communication network.

On the basis, adding second time information in the second time synchronization message, and optional embodiments include: after the receiving time of the first time synchronization message is added to the second time synchronization message through the first TSN converter, the receiving time is transmitted to the UPF network element, the second time synchronization message added with the receiving time of the first time synchronization message is transmitted to the second TSN converter through the UPF network element, the RAN network element and the terminal UE in sequence, and the forwarding time of the first time synchronization message is added to the second time synchronization message through the second TSN converter. In this embodiment, the time for receiving the first time synchronization packet is the time for receiving the first time packet by the first TSN converter; the forwarding time of the first time synchronization message is the time when the second TSN converter forwards the second time message to the target device.

In this embodiment, clock synchronization between the TSN target terminal device and the master clock device is realized while data information is transmitted based on the 5G analog TSN bridge, and in this embodiment, the first TSN converter adds the receiving time of the first time synchronization message to the second time synchronization message, and the second TSN converter adds the forwarding time of the first time synchronization message to the second time synchronization message, so that it can be determined that the residence time of the first time synchronization message in the 5G analog TSN bridge is independent of the clock of the 5G network, that is, the clock of the 5G network does not affect the clock of the TSN network, and the clock of the 5G network and the clock of the TSN network do not need to keep synchronous.

Optionally, based on the 5G analog TSN bridge in this embodiment, a plurality of working time domains may be provided simultaneously, where each working time domain includes one master clock device and one target terminal device, and a corresponding 5G analog TSN bridge, where one 5G analog TSN bridge may serve a plurality of working time domains simultaneously, and each working time domain has a corresponding clock domain number. As shown in fig. 3, four working time domains (the master clock device 1 and the target terminal device 1 belong to the same working time domain, the master clock device 2 and the target terminal device 2 belong to the same working time domain, the master clock device 3 and the target terminal device 3 belong to the same working time domain, and the master clock device 4 and the target terminal device 4 belong to the same working time domain) and two 5G analog TSN bridges are shown in fig. 3, each 5G analog TSN bridge connects two master clock devices and two target terminal devices, and when a first time synchronization message sent by the master clock device enters a first TSN converter, a UPF network element sends the first time synchronization message to a corresponding terminal UE through a RAN network element according to a clock domain number in the first time synchronization message, and sends the first time synchronization message to the corresponding target terminal device after passing through a second TSN converter.

On this basis, an alternative implementation manner of forwarding the first time synchronization packet to the target terminal device of the private network in S201 is as follows: determining target terminal equipment from candidate equipment of a private network according to a clock domain number carried by the first time synchronization message; and forwarding the first time synchronization message to the target terminal equipment.

The method for forwarding the second time synchronization message is the same as the method for forwarding the first time synchronization message.

In the embodiment, based on the structural design of the 5G simulation TSN bridge, synchronous work of a plurality of working time domains is realized, and the requirements of different service scenes can be met. For example, some service scenarios have strict requirements on the working time domain, and must be accurate to microseconds, at this time, the service may be divided into one working time domain separately, and when time synchronization is performed, the corresponding time information (for example, the main flow time, the receiving time of the first time synchronization packet, and the forwarding time of the first time synchronization packet) is accurate to microseconds.

Optionally, in this embodiment, based on the structural design of the 5G analog TSN bridge, data transmission between working time domains may also be implemented, and when there is a corresponding requirement, as shown in fig. 3, a data channel may be constructed between UPF network elements of the corresponding 5G analog TSN bridge through an N19 interface, so that data transmission between the working time domains and the 5G analog TSN bridge is implemented.

In this embodiment, the monitoring device may be some sensors, for example, an air outlet air speed of the temperature control device in the cabin is collected through an air speed sensor, an air outlet temperature is collected through a temperature sensor, power supply current information of the temperature control device in the cabin is collected through a current sensor, and power supply voltage information of the temperature control device in the cabin is collected through a voltage sensor.

In this embodiment, the 5G analog TSN bridge includes a first TSN converter, a UPF network element, a RAN network element, a terminal UE, and a second TSN converter that are sequentially connected, based on the structural design of the 5G analog TSN bridge, not only is data transmission based on a 5G network realized, but also time synchronization of a target terminal device can be accurately performed, and the 5G analog TSN bridge can also support multiple working time domains at the same time, so as to meet different service scene requirements.

In one embodiment, based on the 5G analog TSN bridge, data transmission of the user plane, such as a time synchronization message, and data traffic of the 5G network, a data transmission path of the user plane is shown by a short dashed line in fig. 4 (i.e., an S1 dashed line in fig. 4), so as to facilitate user configuration of the TSN network and configuration of the 5G analog TSN bridge, as shown in fig. 4, the RAN network element is connected to an access and mobility management function AMF network element, the AMF network element is connected to an application function AF network element, the AF network element is connected to a congestion notification function CNC network element, and the CNC network element is connected to the 5G analog TSN bridge.

Specifically, for the user configuration information of the 5G analog TSN bridge, the user of the target terminal device sends the user configuration information to the CNC network element (as shown by the S2 dashed line in fig. 4) sequentially through the second TSN converter, the terminal UE, the RAN network element, the AMF network element, and the AF network element path through the NUI interface of the user network interface, and the CNC network element manages and configures the 5G analog TSN bridge based on the user configuration information. In this embodiment, the AF network element mainly functions as a TSN converter of the 5G network control plane. It should be noted that, the communication between the CNC network element and the 5G network control plane network element (for example, the session management function SMF network element and the policy control function PCF network element) is also forwarded through the AF network element.

Wherein, the AMF (Access and Mobility Management Function ) network element is responsible for the functions of UE identity verification, authentication, registration, mobility management, connection management and the like.

The AF (Application Function ) network element, like an application server, interacts with other 5G core network control plane NF and provides traffic services.

The SMF (Session Management Function ) network element is mainly used to assign IP addresses to handsets and is responsible for the management of the various channels between the handsets and the core network in the internet.

The PCF (Policy Control Function ) network element supports a unified policy framework to manage network behavior, provides policy rules to network entities to implement enforcement, accesses subscription information of a Unified Data Repository (UDR).

The embodiment can perform configuration management on the 5G simulation TSN bridge according to the user configuration information of the target terminal user.

In one embodiment, in order to more accurately achieve time synchronization between the target terminal device and the master clock device, the second time information further includes: a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device.

In this embodiment, the second information further includes a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device, and by combining the residence time of the first time synchronization packet in the 5G analog TSN bridge, all the time consumption of the first time synchronization packet between the master clock device and the target terminal device can be determined, and then according to the sending time of the master clock device to the first time synchronization packet, the time synchronization with the master clock device can be more accurately implemented.

In one embodiment, as shown in fig. 5, an alternative implementation of determining the second delay includes:

S501, a first delay measurement message is sent to target terminal equipment, wherein the first delay measurement message is used for indicating the target terminal equipment to feed back a second delay measurement message to a 5G analog TSN bridge after receiving the first delay measurement message; the second delay measurement message carries the receiving time of the target terminal equipment for receiving the first delay measurement message and the sending time of the second delay measurement message.

The first delay measurement message is sent by the 5G analog TSN bridge to the target terminal equipment and is used for measuring a second delay of a communication transmission link between the 5G analog TSN bridge and the target terminal equipment. The second delay measurement message refers to a message fed back to the 5G analog TSN bridge after the target terminal device receives the first delay measurement message, and the second delay measurement message carries the receiving time of the target terminal device for receiving the first delay measurement message and the sending time of the second delay measurement message.

Optionally, in this embodiment, the second TSN converter of the 5G analog TSN bridge may send the first delay measurement packet to the target terminal device.

S502, receiving a second delay measurement message fed back by the target terminal equipment.

Optionally, in this embodiment, the second TSN converter of the 5G analog TSN bridge may receive a second delay measurement packet fed back by the target terminal device.

S503, determining the second delay according to the sending time of the first delay measurement message, the receiving time of the target terminal equipment to the first delay measurement message, the receiving time of the 5G analog TSN bridge to the second delay measurement message, and the sending time of the second delay measurement message.

An alternative implementation manner of this embodiment is as follows: and taking the time difference between the sending time of the first delay measurement message and the receiving time of the target terminal equipment on the first delay measurement message as a first time difference. And according to the time difference between the receiving time of the 5G analog TSN bridge to the second delay measurement message and the sending time of the second delay measurement message, taking the time difference as the second time difference, averaging the first time difference and the second time difference, and taking the average value as the second delay.

It should be noted that, in addition to the foregoing embodiment, in this embodiment, the second delay may be determined according to the sending time of the first delay measurement packet and the receiving time of the first delay measurement packet by the target terminal device. Or, the 5G simulation TSN bridge measures the receiving time of the message for the second delay, and the sending time of the message for the second delay measures, so as to determine the second delay.

In this embodiment, a first delay measurement message is sent to a target terminal device, where the first delay measurement message is used to instruct the target terminal device to feedback a second delay measurement message to a 5G analog TSN bridge after receiving the first delay measurement message; the second delay measurement message carries the receiving time of the first delay measurement message received by the target terminal device and the sending time of the second delay measurement message, receives the second delay measurement message fed back by the target terminal device, and can accurately determine the second delay according to the sending time of the first delay measurement message, the receiving time of the first delay measurement message received by the target terminal device, the receiving time of the second delay measurement message received by the 5G analog TSN bridge, and the sending time of the second delay measurement message.

In one embodiment, as shown in fig. 6, an alternative way of determining the first delay includes:

s601, a third delay measurement message is sent to the master clock device. The third delay measurement message is used for indicating the master clock equipment to feed back a fourth delay measurement message to the 5G analog TSN bridge after receiving the third delay measurement message; the fourth delay measurement message carries the receiving time of the master clock device for receiving the third delay measurement message and the sending time of the fourth delay measurement message.

Optionally, in this embodiment, the first TSN converter may send a third delay measurement packet to the master clock device.

S602, receiving a fourth delay measurement message fed back by the master clock device.

Optionally, in this embodiment, the first TSN converter may receive a fourth delay measurement packet fed back by the master clock device.

S603, according to the sending time of the fourth delay measurement message, the receiving time of the master clock device to the third delay measurement message, the receiving time of the 5G analog TSN bridge to the fourth delay measurement message, and the sending time of the fourth delay measurement message, the first delay can be accurately determined.

It should be noted that, the determination manner of the first delay is the same as that of the second delay in the above embodiment, and the specific scheme is not described herein again.

In one embodiment, fig. 7 is a flowchart of a time synchronization method according to an embodiment of the present application, and the method is applied to the target terminal device in fig. 1, for example, and the method includes the following steps:

s701, receiving a first time synchronization message forwarded by a 5G analog TSN bridge.

S702, receiving a second time synchronization message forwarded by the 5G analog TSN bridge. The first time synchronization message and the second time synchronization message are sent to a 5G simulation TSN bridge by a main clock device of a private network; the second time synchronization message carries first time information and second time information; the first time information is the time added by the master clock device when the master clock device transmits a first time synchronization message; the second time information is a residence time of the first time synchronization message added by the 5G analog TSN bridge at the 5G analog TSN bridge.

S703, performing time synchronization with the master clock device according to the first time information and the second time information and the actual time of the local receiving the first time synchronization message.

It should be noted that, according to the first time information and the second time information, and the actual time of receiving the first time synchronization message locally, time synchronization is performed with the master clock device. The foregoing embodiments are described in detail, and are not described herein.

According to the time of the master clock device added by the master clock device in the first time information for sending the first time synchronization message, the residence time of the first time synchronization message in the second time information at the 5G analog TSN bridge and the actual time for locally receiving the first time synchronization message, the time synchronization between the target terminal device and the master clock device can be achieved.

In one embodiment, in order to more accurately achieve time synchronization between the target terminal device and the master clock device, the second time information in this embodiment further includes: a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device.

Based on the above embodiment, as shown in fig. 8, an alternative implementation manner in S703 includes:

S801, determining time consumption for transmitting the first time synchronization message according to the residence time, the first delay and the second delay in the second time information.

Optionally, in this embodiment, the time consumed for transmitting the first time synchronization packet may be determined by summing the residence time, the first delay and the second delay in the second time information.

S802, according to the first time information and the time consumption of the transmission of the first time synchronization message, the expected time of locally receiving the first time synchronization message is determined.

The expected time refers to the predicted time of locally receiving the first time synchronization message.

Optionally, in this embodiment, the time of sending the first time synchronization packet according to the master clock device in the first time information, plus the time consumed for transmitting the first time synchronization packet, is taken as the expected time for locally receiving the first time synchronization packet.

S803, time synchronization is carried out with the master clock device according to the expected time and the actual time of the local receiving of the first time synchronization message.

Optionally, in this embodiment, the expected time is first compared with the actual time of the local receiving the first time synchronization packet, and if the comparison result is consistent, it is indicated that the local time is time-synchronized with the master clock device. If the comparison result is inconsistent, calculating a time difference value between the expected time and the actual time of the local receiving of the first time synchronization message, and adjusting the time of the target terminal equipment based on the time difference value to perform time synchronization with the master clock equipment.

In one embodiment, as shown in fig. 9, an alternative implementation of determining the second delay includes:

s901, receiving a first delay measurement message sent by a 5G analog TSN bridge. The first delay measurement message carries the sending time of the first delay measurement message.

S902, feeding back a second delay measurement message to the 5G analog TSN bridge; the second delay measurement message carries the receiving time of the first delay measurement message and the sending time of the second delay measurement message; the first delay measurement message and the second delay measurement message are used for indicating the 5G analog TSN bridge to determine the second delay based on the sending time and the receiving time of the first delay measurement message, the receiving time of the second delay measurement message by the 5G analog TSN bridge, and the sending time of the second delay measurement message.

It should be noted that, the specific implementation manner of determining the second delay is described in detail in the foregoing embodiments, and is not described herein again.

In one embodiment, as shown in fig. 10, an alternative implementation manner of a private network time synchronization method is provided, where the embodiment provides a method for implementing private network time synchronization by three-terminal interaction with a master clock device, a 5G analog TSN bridge and a target terminal device, and specifically includes:

S1001, the master clock device sends a first time synchronization message to the 5G analog TSN bridge. The 5G analog TSN bridge comprises a first TSN converter, a UPF network element, a RAN network element, a terminal UE and a second TSN converter which are sequentially connected.

S1002, the master clock device sends a second time synchronization message carrying the first time information to the 5G analog TSN bridge.

S1003, the 5G simulation TSN bridge determines a target terminal device from candidate devices of the private network according to the clock domain number carried by the first time synchronization message.

S1004, the 5G analog TSN bridge forwards the first time synchronization message to the target terminal equipment.

S1005, the 5G analog TSN bridge receives a second time synchronization message carrying the first time information sent by a master clock device of the private network. The first time information is the time of the master clock device sending the first time synchronization message.

S1006, the 5G analog TSN bridge adds second time information in a second time synchronization message. The second time information comprises residence time of the first time synchronization message at the 5G analog TSN bridge, first delay between the master clock device and the 5G analog TSN bridge and second delay between the 5G analog TSN bridge and the target terminal device. The residence time comprises the receiving time and the forwarding time of the first time synchronous message. The method for adding the receiving time and the forwarding time of the first time synchronization message comprises the following steps: and adding the receiving time of the first time synchronization message to the second time synchronization message through the first TSN converter, and transmitting the second time synchronization message to the UPF network element. The receiving time of the first time synchronization message is the time of the first TSN converter receiving the first time message. Transmitting a second time synchronization message added with the receiving time of the first time synchronization message to a second TSN converter through a UPF network element, a RAN network element and a terminal UE in sequence; and adding the forwarding time of the first time synchronization message into the second time synchronization message through the second TSN converter. The forwarding time of the first time synchronization message is the time when the second TSN converter forwards the second time message to the target device.

S1007, the 5G analog TSN bridge forwards the second time synchronization message added with the second time information to the target terminal equipment.

S1008, the target terminal equipment receives the first time synchronization message forwarded by the 5G analog TSN bridge.

S1009, the target terminal equipment receives the second time synchronization message forwarded by the 5G analog TSN bridge.

S10010, the target terminal device determines the time consumption of the transmission of the first time synchronization message according to the residence time, the first delay and the second delay in the second time information.

S10011, the target terminal device determines the expected time of receiving the first time synchronization message locally according to the first time information and the time consumption of the transmission of the first time synchronization message.

And S10012, the target terminal equipment performs time synchronization with the master clock equipment according to the expected time and the actual time of locally receiving the first time synchronization message.

In this embodiment, a first time synchronization message sent by a master clock device of a private network is received, the first time synchronization message is forwarded to a target terminal device of the private network, a second time synchronization message carrying first time information sent by the master clock device of the private network is received, and second time information is added in the second time synchronization message, where the first time information is a time when the master clock device sends the first time synchronization message, the second time information includes a residence time of the first time synchronization message at a 5G analog TSN bridge, and the second time synchronization message added with the second time information is forwarded to the target terminal device, so that the target terminal device performs time correction based on the first time information and the second time information in the second time synchronization message, and maintains time synchronization with the master clock device.

For a better understanding of the above embodiments, a detailed explanation is provided below in connection with a specific embodiment. In one embodiment, as shown in fig. 11, the master clock device sends a first time synchronization message (e.g., sync message) to the 5G analog TSN bridge, and after sending the first time synchronization message, sends a second time synchronization message (e.g., follow_up message) associated with the first time synchronization message to the 5G analog TSN bridge, where the second time synchronization message carries the first time information. And the 5G simulation TSN bridge determines target terminal equipment from candidate equipment of the private network according to the clock domain number carried by the first time synchronization message, and sends the first time synchronization message to the target terminal equipment. After the first TSN converter of the 5G analog TSN bridge receives the second time synchronization message, the receiving time of the first time synchronization message is added in the second time synchronization message, the receiving time is sent to the second TSN converter once through the UPF network element, the RAN network element and the terminal UE, after the second time synchronization message is received by the second TSN converter, the forwarding time for forwarding the first time synchronization message to the target terminal equipment is added in the second time synchronization message, the second time synchronization message is forwarded to the target terminal equipment, and the residence time of the first time message in the 5G analog TSN bridge can be determined based on the receiving time and the forwarding time of the first time message.

The 5G simulation TSN bridge sends a first delay measurement message to the target terminal equipment, after the target terminal equipment receives the first delay measurement message, the target terminal equipment feeds back a second delay measurement message to the 5G simulation TSN bridge, wherein the second delay measurement message carries the receiving time of the target terminal equipment for receiving the first delay measurement message and the sending time of the second delay measurement message, receives the second delay measurement message fed back by the target terminal equipment, and can determine the second delay according to the sending time of the first delay measurement message, the receiving time of the target terminal equipment for the first delay measurement message, the receiving time of the 5G simulation TSN bridge for the second delay measurement message and the sending time of the second delay measurement message.

The 5G simulation TSN bridge sends a third delay measurement message to the master clock device, and after the master clock device receives the third delay measurement message, the master clock device feeds back a fourth delay measurement message to the 5G simulation TSN bridge, wherein the fourth delay measurement message carries the receiving time of the master clock device for receiving the third delay measurement message and the sending time of the fourth delay measurement message. The 5G analog TSN bridge receives a fourth delay measurement message fed back by the master clock device. The 5G analog TSN bridge can determine the first delay according to the sending time of the fourth delay measurement message, the receiving time of the master clock device to the third delay measurement message, the receiving time of the 5G analog TSN bridge to the fourth delay measurement message and the sending time of the fourth delay measurement message.

The target terminal device may determine a time consuming transmission of the first time synchronization message according to a residence time of the first time synchronization message in the 5G analog TSN bridge, a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device. According to the sending time of the first time synchronization message in the first time information and the time consumption of the transmission of the first time synchronization message, determining the expected time of locally receiving the first time synchronization message, comparing the expected time with the actual time of locally receiving the first time synchronization message, and if the comparison result is consistent, indicating that the local time is synchronous with the time of the master clock device. If the comparison result is inconsistent, calculating a time difference value between the expected time and the actual time of the local receiving of the first time synchronization message, and adjusting the time of the target terminal equipment based on the time difference value to perform time synchronization with the master clock equipment.

It should be understood that, although the steps in the flowcharts related to the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.

Based on the same inventive concept, the embodiment of the application also provides a time synchronization device for realizing the above-mentioned related time synchronization method. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in one or more embodiments of the time synchronization device provided below may refer to the limitation of the time synchronization method hereinabove, and will not be repeated herein.

In one embodiment, a block diagram of the time synchronization device in one embodiment is shown by FIG. 12. As shown in fig. 12, there is provided a time synchronization apparatus 1 including: a first receiving module 11, an adding module 12 and a forwarding module 13, wherein:

the first receiving module 11 is configured to receive a first time synchronization packet sent by a master clock device of the private network, and forward the first time synchronization packet to a target terminal device of the private network.

An adding module 12, configured to receive a second time synchronization packet carrying first time information sent by a master clock device of the private network, and add the second time information to the second time synchronization packet; the first time information is the time of the master clock device to send the first time synchronization message; the second time information includes a residence time of the first time synchronization message at the 5G analog TSN bridge. The residence time comprises the receiving time and the forwarding time of the first time synchronous message.

And the forwarding module 13 is configured to forward a second time synchronization packet added with second time information to the target terminal device, where the second time synchronization packet is used for the target terminal device to perform time synchronization with the master clock device based on the first time information and the second time information.

In one embodiment, the 5G analog TSN bridge includes a first TSN converter, a UPF network element, a RAN network element, a terminal UE, and a second TSN converter connected in sequence, where the adding module 12 in fig. 12 further includes:

the first adding unit is configured to add, by using the first TSN converter, a receiving time of the first time synchronization packet to the second time synchronization packet, and then transmit the second time synchronization packet to the UPF network element. The receiving time of the first time synchronization message is the time of the first TSN converter receiving the first time message.

And the transmission unit is used for transmitting the second time synchronization message added with the receiving time of the first time synchronization message to the second TSN converter through the UPF network element, the RAN network element and the terminal UE in sequence.

And the second adding unit is used for adding the forwarding time of the first time synchronization message into the second time synchronization message through the second TSN converter. The forwarding time of the first time synchronization message is the time when the second TSN converter forwards the second time message to the target device.

In one embodiment, the time synchronization device 1 in fig. 12 further includes:

the sending module is used for sending a first delay measurement message to the target terminal equipment, wherein the first delay measurement message is used for indicating the target terminal equipment to feed back a second delay measurement message to the 5G simulation TSN bridge after receiving the first delay measurement message; the second delay measurement message carries the receiving time of the target terminal equipment for receiving the first delay measurement message and the sending time of the second delay measurement message;

a fourth receiving module, configured to receive a second delay measurement packet fed back by the target terminal device;

the determining module is used for determining the second delay according to the sending time of the first delay measurement message, the receiving time of the target terminal equipment to the first delay measurement message, the receiving time of the 5G analog TSN bridge to the second delay measurement message and the sending time of the second delay measurement message.

In one embodiment, the first receiving module 11 in fig. 12 further includes:

the first determining unit is used for determining target terminal equipment from candidate equipment of the private network according to the clock domain number carried by the first time synchronization message;

And the forwarding unit is used for forwarding the first time synchronization message to the target terminal equipment.

In one embodiment, a block diagram of the time synchronization device in one embodiment is shown by FIG. 13. As shown in fig. 13, there is provided a time synchronization apparatus 2 including: a second receiving module 21, a third receiving module 22 and a time synchronizing module 23, wherein:

the second receiving module 21 is configured to receive the first time synchronization packet forwarded by the 5G analog TSN bridge.

A third receiving module 22, configured to receive a second time synchronization packet forwarded by the 5G analog TSN bridge; the first time synchronization message and the second time synchronization message are sent to a 5G simulation TSN bridge by a main clock device of a private network; the second time synchronization message carries first time information and second time information; the first time information is the time added by the master clock device when the master clock device transmits a first time synchronization message; the second time information is a residence time of the first time synchronization message added by the 5G analog TSN bridge at the 5G analog TSN bridge.

The time synchronization module 23 is configured to perform time synchronization with the master clock device according to the first time information and the second time information, and an actual time of locally receiving the first time synchronization message.

In one embodiment, the second time information in the third receiving module 22 in fig. 13 further includes: a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device.

In one embodiment, the time synchronization module 23 in fig. 13 above further includes:

the second determining unit is used for determining the time consumption of the transmission of the first time synchronization message according to the residence time, the first delay and the second delay in the second time information;

the third determining unit is used for determining the expected time for locally receiving the first time synchronization message according to the first time information and the time consumption of the transmission of the first time synchronization message;

and the time synchronization unit is used for performing time synchronization with the master clock device according to the expected time and the actual time of the local receiving of the first time synchronization message.

In one embodiment, the time synchronization device 2 in fig. 13 above further includes:

the fifth receiving module is used for receiving a first delay measurement message sent by the 5G analog TSN bridge; the first delay measurement message carries the sending time of the first delay measurement message.

And the feedback module is used for feeding back a second delay measurement message to the 5G analog TSN bridge. The second delay measurement message carries the receiving time of the first delay measurement message and the sending time of the second delay measurement message; the first delay measurement message and the second delay measurement message are used for indicating the 5G analog TSN bridge to determine the second delay based on the sending time and the receiving time of the first delay measurement message, the receiving time of the second delay measurement message by the 5G analog TSN bridge, and the sending time of the second delay measurement message.

The various modules in the time synchronization apparatus described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.

In one embodiment, a computer device is provided, which may be a platform side, and the internal structure of which may be as shown in fig. 14. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of computer devices is used to store equipment bay information. The network interface of the computer device is used for communicating with an external user side through a network connection. The computer program is executed by a processor to implement a time synchronization method.

It will be appreciated by those skilled in the art that the structure shown in fig. 14 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements are applied, and in particular, the computer device may include more or less components than those shown, or may combine some of the components, or have a different arrangement of components.

In one embodiment, a computer device is provided, comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:

In one embodiment, the processor when executing the computer program further performs the steps of: the residence time includes the time of receipt and the time of forwarding of the first time synchronization message.

In one embodiment, the processor when executing the computer program further performs the steps of: the receiving time of the first time synchronization message is the time of the first TSN converter receiving the first time message; the forwarding time of the first time synchronization message is the time when the second TSN converter forwards the second time message to the target device.

In one embodiment, the processor when executing the computer program further performs the steps of: the second time information further includes: a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device.

In one embodiment, the processor when executing the computer program further performs the steps of: the method further comprises the steps of:

In one embodiment, the processor when executing the computer program further performs the steps of: forwarding the first time synchronization message to a target terminal device of the private network, comprising:

The principles and specific procedures of implementing the foregoing embodiments of the computer device provided in the foregoing embodiments may be referred to the description in the foregoing embodiments of the time synchronization method, which is not repeated herein.

In one embodiment, another computer device is provided, comprising a memory having a computer program stored therein and a processor that when executing the computer program performs the steps of:

In one embodiment, the processor when executing the computer program further performs the steps of: according to the first time information and the second time information and the actual time of locally receiving the first time synchronization message, performing time synchronization with the master clock device, including:

In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:

In one embodiment, the computer program when executed by the processor further performs the steps of: the residence time includes the time of receipt and the time of forwarding of the first time synchronization message.

In one embodiment, the computer program when executed by the processor further performs the steps of: the 5G analog TSN bridge comprises a first TSN converter, a UPF network element, a RAN network element, a terminal UE and a second TSN converter which are connected in sequence;

In one embodiment, the computer program when executed by the processor further performs the steps of: the second time information further includes: a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device.

In one embodiment, the computer program when executed by the processor further performs the steps of: the method further comprises the steps of:

In one embodiment, the computer program when executed by the processor further performs the steps of: forwarding the first time synchronization message to a target terminal device of the private network, comprising:

The principles and specific procedures of implementing the foregoing embodiments of the computer readable storage medium in the foregoing embodiments may be referred to in the foregoing embodiments of the time synchronization method, which are not described herein.

In one embodiment, another computer-readable storage medium is provided, having stored thereon a computer program which, when executed by a processor, performs the steps of:

In one embodiment, the computer program when executed by the processor further performs the steps of: according to the first time information and the second time information and the actual time of locally receiving the first time synchronization message, performing time synchronization with the master clock device, including:

In one embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, performs the steps of:

In one embodiment, the computer program when executed by the processor further performs the steps of: the receiving time of the first time synchronization message is the time of the first TSN converter receiving the first time message; the forwarding time of the first time synchronization message is the time when the second TSN converter forwards the second time message to the target device.

The principles and specific procedures of implementing the embodiments of the computer program product provided above may be referred to in the description of the time synchronization embodiments in the foregoing embodiments, and are not repeated herein.

In one embodiment, another computer program product is provided comprising a computer program which, when executed by a processor, performs the steps of:

It should be noted that, the data related to the present application (including, but not limited to, data in the time synchronization process, etc.) are all data fully authorized by each party, and the collection, use and processing of the related data need to comply with the related laws and regulations and standards of the related country and region.

Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.

Claims

1. A method of time synchronization for a fifth generation communication technology 5G analog time sensitive network TSN bridge, the method comprising:

receiving a second time synchronization message carrying first time information sent by a master clock device of the private network, and adding second time information into the second time synchronization message; the first time information is the time of the master clock device to send the first time synchronization message; the second time information includes a residence time of the first time synchronization message at the 5G analog TSN bridge;

And forwarding a second time synchronization message added with the second time information to target terminal equipment, wherein the second time synchronization message is used for the target terminal equipment to perform time synchronization with the master clock equipment based on the first time information and the second time information.

2. The method of claim 1, wherein the residence time comprises a time of receipt and a time of forwarding of the first time synchronization message.

3. The method according to claim 2, wherein the 5G analog TSN bridge comprises a first TSN converter, a user plane function UPF network element, an access network RAN network element, a terminal UE, and a second TSN converter connected in sequence;

the adding the second time information in the second time synchronization message includes:

adding the receiving time of the first time synchronization message to the second time synchronization message through the first TSN converter, and transmitting the second time synchronization message to a UPF network element;

and adding the forwarding time of the first time synchronization message into the second time synchronization message through a second TSN converter.

4. The method of claim 3, wherein the time of receipt of the first time synchronization message is the time of receipt of the first time message by the first TSN converter; and the forwarding time of the first time synchronization message is the time of forwarding a second time message to the target equipment by the second TSN converter.

5. The method according to claim 1 or 2, wherein the second time information further comprises: a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device.

6. The method of claim 4, further comprising:

a first delay measurement message is sent to the target terminal equipment, and the first delay measurement message is used for indicating the target terminal equipment to feed back a second delay measurement message to the 5G analog TSN bridge after receiving the first delay measurement message; the second delay measurement message carries the receiving time of the target terminal equipment for receiving the first delay measurement message and the sending time of the second delay measurement message;

And determining the second delay according to the sending time of the first delay measurement message, the receiving time of the target terminal equipment on the first delay measurement message, the receiving time of the 5G analog TSN bridge on the second delay measurement message and the sending time of the second delay measurement message.

7. The method according to claim 1, wherein said forwarding said first time synchronization message to a target terminal device of said private network comprises:

determining target terminal equipment from candidate equipment of the private network according to the clock domain number carried by the first time synchronization message;

and forwarding the first time synchronization message to target terminal equipment.

8. A method of time synchronization, applied to a target terminal device of a private network, the method comprising:

receiving a second time synchronization message forwarded by a 5G analog TSN bridge; wherein the first time synchronization message and the second time synchronization message are sent to the 5G analog TSN bridge by a master clock device of the private network; the second time synchronization message carries first time information and second time information; the first time information is the time added by the master clock device when the master clock device sends the first time synchronization message; the second time information is residence time of the first time synchronization message added by the 5G analog TSN bridge at the 5G analog TSN bridge;

And according to the first time information and the second time information and the actual time of locally receiving the first time synchronization message, performing time synchronization with the master clock device.

9. The method of claim 8, wherein the second time information further comprises: a first delay between the master clock device and the 5G analog TSN bridge, and a second delay between the 5G analog TSN bridge and the target terminal device.

10. The method of claim 8, wherein the time synchronizing with the master clock device based on the first time information and the second time information, and an actual time of the local receipt of the first time synchronization message, comprises:

determining time consumption for transmitting a first time synchronization message according to the residence time, the first delay and the second delay in the second time information;

11. The method according to claim 8 or 9, wherein the method further comprises:

feeding back a second delay measurement message to the 5G analog TSN bridge; the second delay measurement message carries the receiving time of the first delay measurement message and the sending time of the second delay measurement message; the first delay measurement message and the second delay measurement message are used for indicating a 5G analog TSN bridge to determine the second delay based on the sending time and the receiving time of the first delay measurement message, the receiving time of the second delay measurement message by the 5G analog TSN bridge, and the sending time of the second delay measurement message.

12. A time synchronization apparatus for use with a 5G analog TSN bridge, the apparatus comprising:

the first receiving module is used for receiving a first time synchronization message sent by a main clock device of a private network and forwarding the first time synchronization message to a target terminal device of the private network;

the adding module is used for receiving a second time synchronization message carrying first time information sent by the master clock equipment of the private network and adding the second time information into the second time synchronization message; the first time information is the time of the master clock device to send the first time synchronization message; the second time information includes a residence time of the first time synchronization message at the 5G analog TSN bridge;

And the forwarding module is used for forwarding a second time synchronization message added with the second time information to target terminal equipment, wherein the second time synchronization message is used for the target terminal equipment to perform time synchronization with the master clock equipment based on the first time information and the second time information.

13. A time synchronization apparatus for a target terminal device of a private network, the apparatus comprising:

the third receiving module is used for receiving a second time synchronization message forwarded by the 5G analog TSN bridge; wherein the first time synchronization message and the second time synchronization message are sent to the 5G analog TSN bridge by a master clock device of the private network; the second time synchronization message carries first time information and second time information; the first time information is the time added by the master clock device when the master clock device sends the first time synchronization message; the second time information is residence time of the first time synchronization message added by the 5G analog TSN bridge at the 5G analog TSN bridge;

And the time synchronization module is used for carrying out time synchronization with the master clock equipment according to the first time information and the second time information and the actual time of the local receiving of the first time synchronization message.

14. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 11 when the computer program is executed.

15. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 11.

16. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any one of claims 1 to 11.