CN114071768A

CN114071768A - Time synchronization method, device and storage medium

Info

Publication number: CN114071768A
Application number: CN202010791396.1A
Authority: CN
Inventors: 徐昊; 谌丽; 皮埃尔
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2022-02-18
Anticipated expiration: 2040-08-07
Also published as: CN114071768B

Abstract

The embodiment of the application provides a time synchronization method, a time synchronization device and a storage medium, wherein the method comprises the following steps: when the terminal detects the TSN specific information of the time sensitive network, the TSN specific information is transmitted preferentially; the TSN specific information is TSN time synchronization information or data related to the TSN time synchronization information. The embodiment of the application meets the time delay requirement after the TSN network and the 5G network are fused.

Description

Time synchronization method, device and storage medium

Technical Field

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

Background

Time Sensitive Networking (TSN) refers to a set of protocol standards developed by the TSN task group in the IEEE802.1 working group. The standard defines a time-sensitive mechanism for ethernet data transmission, adding certainty and reliability to standard ethernet to ensure that ethernet can provide a consistent level of service for the transmission of critical data.

In the current technical research, a technology for fusing 5G and TSN is proposed, and the technology will promote the deep fusion of 5G and industrial TSN network, thereby generating a larger market. However, how to guarantee the strict delay requirement after the TSN and 5G are fused needs to be discussed.

Disclosure of Invention

The embodiment of the application provides a time synchronization method, a time synchronization device and a storage medium, so as to meet the strict time delay requirement after the fusion of a TSN and a 5G.

In a first aspect, an embodiment of the present application provides a time synchronization method, including:

when the terminal detects the TSN specific information of the time sensitive network, the TSN specific information is transmitted preferentially; wherein the TSN specific information includes TSN time synchronization information or data related to the TSN time synchronization information.

In a second aspect, an embodiment of the present application provides a time synchronization apparatus, including a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

In a third aspect, an embodiment of the present application provides a time synchronization apparatus, including:

the terminal comprises a transmission module, a receiving module and a sending module, wherein the transmission module is used for preferentially transmitting the TSN specific information when the terminal detects the TSN specific information of the time sensitive network; wherein the TSN specific information includes TSN time synchronization information or data related to the TSN time synchronization information.

In a fourth aspect, the present application provides a processor-readable storage medium, which stores a computer program for causing a processor to execute the steps of the method according to the first aspect.

According to the time synchronization method, the time synchronization device and the storage medium provided by the embodiment of the application, when the terminal detects the TSN specific information, the TSN specific information is preferentially transmitted, and the TSN specific information is TSN time synchronization information or data related to the TSN time synchronization information, so that the preferential transmission of TSN uplink time synchronization information or data in a 5G system after the TSN is fused with the 5G system is met, the strict time delay requirement after the TSN and the 5G are fused is ensured, and the problem that the system performance after the TSN and the 5G system are fused cannot meet the actual time delay requirement due to the fact that the preferential transmission of TSN uplink timing information or data cannot be ensured when a TSN system main clock is located at a TSN point in the prior art is solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a flow chart of the steps of a method for time synchronization in an embodiment of the present application;

FIG. 2 is a schematic view of a first embodiment of the present application;

FIG. 3 is a second schematic diagram of the first embodiment in the present application;

FIG. 4 is a schematic diagram of a second embodiment of an embodiment of the present application;

FIG. 5 is a schematic view of a third embodiment of the present application;

FIG. 6 is a schematic view of a fourth embodiment of the present application;

FIG. 7 is a schematic illustration of a fifth embodiment of an embodiment of the present application;

FIG. 8 is a schematic illustration of a sixth embodiment of an embodiment of the present application;

FIG. 9 is a schematic view of a seventh embodiment of the present application;

FIG. 10 is a schematic structural diagram of a time synchronizer according to an embodiment of the present application;

fig. 11 is a block diagram of a time synchronization apparatus according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

A 5G New air interface (New Radio, NR) system mainly supports the following three types of services: enhanced Mobile Broadband Communications (eMBB), massive Machine Type Communications (mMTC), and high-reliability Low-Latency Communications (URLLC). For URLLC services, there are many corresponding application scenarios, and currently, the most widely discussed application scenarios include Industrial Internet of Things (IIoT), and the like.

In 3GPP TS23.501, the 5G system is explicitly supported to be integrated in a bridge manner in an IEEE TSN network. The following three scenes are respectively introduced:

the first scenario is as follows: the TSN Grand Master (GM) clock is located in a TSN network timing information processing flow when a time sensitive network Working area (TSN Working Domain) accessed through a User Plane Function (UPF) side is transferred to a time sensitive network terminal Station (TSN End Station) and accessed through a terminal side: when a general precision time protocol (gPTP) message reaches a UPF Side from a TSNWorking Domain, a converter (NW-TT) at the UPF Side sets an entry Time Stamp (TSi) for each gPTP message; and then the UPF sends the modified gPTP message to the terminal through a data plane, when the terminal receives the gPTP message containing the original TSN network timing information and the entry timestamp, a terminal converter (DS-TT) sets an exit timestamp for the received gPTP message (TSe), and the difference value between the TSi and TSe is the residence time (residual time) of the gPTP message transmitted in the 5G system.

The second scenario is as follows: the TSN GM clock is positioned in a TSN network timing information processing flow when the TSN End Station accessed through a terminal side is transmitted to the TSN End Station and accessed through an UPF side: and the TSN GM at the equipment end distributes uplink gPTP information to all TSN end station of UPFs (NW-TTs). The DS-TT forwards the modified uplink gPTP message (the message processing operation of the DS-TT is the same as that of the downlink NW-TT for the downlink gPTP message, for example, link delay to correction field between the DS-TT/terminal 1 and the TSN node (the last node)) to a target UPF through a user plane; when the NW-TT receives the gPTP message, the NW-TT modifies the message (such as updating correlation field, related field), and transmits TSN Working Domain accessed through UPF side.

The third scenario is as follows: the TSN GM clock is positioned in a TSN network timing information processing flow which is transmitted from a TSN End Station accessed by a terminal side to the TSN End Station accessed by the terminal side: the process can multiplex the processes of scenario 2 and scenario 1, and the specific difference is that when the NW-TT/UPF receives a message, it performs local switching (local switching), and forwards the gPTP message to other TSN end station accessed through the terminal side.

In summary, time-related information, such as a gPTP message, needs to be transmitted in the TSN network to ensure that time synchronization is achieved in the TSN network, and since time errors between each hop may accumulate, time synchronization of each hop needs to be precisely guaranteed.

In the current 5G mobile communication system, uplink and downlink transmission are controlled by base station scheduling. When the TSN system master clock is located at the TSN Working domain, the prior transmission of TSN downlink timing information or data can be fully ensured through the internal realization of the base Station, but when the TSN system master clock is located at the TSN End Station, the prior method can not ensure the prior transmission of TSN uplink timing information or data, so that the condition that the system performance after the TSN and the 5GS system are fused can not meet the actual requirement is caused.

Therefore, embodiments of the present application provide a time synchronization method, a time synchronization device, and a storage medium, so as to solve the problem that the performance of a system after a TSN and a 5GS system are fused cannot meet actual requirements due to the fact that the prior method cannot guarantee the preferential transmission of TSN uplink timing information or data.

The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

The technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an LTE-a (long term evolution) system, a universal mobile system (universal mobile telecommunications system, UMTS), a Worldwide Interoperability for Mobile Access (WiMAX) system, a New Radio network (NR 5) system, etc. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5GS), and the like.

The terminal device referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another processing device connected to a wireless modem. In different systems, the names of the terminal devices may be different, for example, in a 5G system, the terminal device may be called a User Equipment (UE). A wireless terminal device, which may be a mobile terminal device such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal device, for example, a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN). Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment of the present application.

The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells for providing services to a terminal. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to exchange received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), may be a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may be an evolved Node B (eNB or e-NodeB) in a Long Term Evolution (LTE) System, may be a 5G Base Station (gbb) in a 5G network architecture (next evolution System), may be a Home evolved Node B (HeNB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico Base Station), and the like, which are not limited in the embodiments of the present application. In some network architectures, a network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

The present application is explained in detail below.

As shown in fig. 1, which is a flowchart illustrating steps of a time synchronization method in an embodiment of the present application, the method includes the following steps:

step 101: when the terminal detects the TSN specific information, the TSN specific information is preferentially transmitted.

In addition, specifically, when the terminal detects the TSN specific information, if there is another information to be transmitted, the terminal preferentially transmits the TSN specific information, that is, transmits the TSN specific information before the other information. Of course, the other information refers to non-TSN specific information, i.e., refers to information other than TSN specific information.

Specifically, the TSN specific information is TSN time synchronization information or data related to the TSN time synchronization information.

The TSN time synchronization information may include a ptp message, and specifically may include a timestamp (specifically, a 5G GM clock or a TSN GM clock), a time delay from one hop on the TSN network, and the like.

The data related to the TSN time synchronization information may refer to data packets or data streams of other TSN networks that need to transmit the same transmission manner as the TSN time synchronization information.

Therefore, when the terminal detects the TSN specific information, the problem that the system performance after the TSN and the 5G system are fused cannot meet the actual requirement due to the fact that the prior cannot guarantee the prior transmission of the uplink timing information or the data of the TSN when the TSN system master clock is located at the TSN terminal station is solved by preferentially transmitting the TSN time synchronization information or the data related to the TSN time synchronization information, and the prior transmission of the uplink timing information or the related data of the TSN in the 5G system after the TSN and the 5G system are fused can be met, so that the strict time delay requirement after the TSN and the 5G system are fused is guaranteed.

In addition, optionally, in this embodiment of the present application, the terminal detecting the TSN specific information may include any one of the following manners:

when the terminal detects that the current data packet carries the identification of the TSN specific information, the TSN specific information is determined to be detected;

when the terminal detects that the content of the current data packet contains TSN specific information, determining to detect the TSN specific information;

when the terminal detects that a quality of service (QoS) flow corresponding to the current data packet is a QoS flow to which the TSN specific information belongs, the TSN specific information is determined to be detected.

That is, the terminal may detect the TSN specific information in any of the above manners.

Specifically, the TSN specific information may include an identifier that is recognizable by a Radio Access Network (RAN) side, so that when the terminal detects that the identifier of the TSN specific information is carried in the current data packet, it can be determined that the TSN specific information is detected; or, the terminal may further identify whether the type of the current packet is a packet of the TSN specific information through deep parsing, that is, detect whether the content of the current packet includes the TSN specific information, thereby determining whether the TSN specific information is detected; or, the higher layer may set the TSN specific information that needs to be preferentially transmitted as an individual QoS stream, and at this time, the terminal may determine whether the TSN specific information is detected by detecting whether the QoS stream corresponding to the current packet is a QoS stream to which the TSN specific information belongs.

Optionally, in this embodiment of the present application, when transmitting the TSN specific information preferentially, any one of the following manners may be included:

in the first method, a packet to which TSN specific information belongs and other packets are allocated to the same Data Radio Bearer (DRB), and when transmission of data in the DRB is permitted, the packet to which TSN specific information belongs is preferentially transmitted.

Specifically, the other packets refer to packets to which the non-TSN specific information belongs, that is, packets other than the packets to which the TSN specific information belongs.

Specifically, when a packet to which the TSN specific information belongs and other packets coexist in the current DRB, the data stream in the existing method is subsequently processed in a first-in first-out manner, that is, the packet to which the TSN specific information belongs is not preferentially processed. In this embodiment, it is possible to ensure that the TSN specific information allocated to the same DRB can be transmitted preferentially by configuring the data packet to which the TSN specific information belongs when the data in the DRB is allowed to be transmitted preferentially.

In the second method, the data packet to which the TSN specific information belongs is mapped to a single DRB, and data in the DRB corresponding to the data packet to which the TSN specific information belongs is preferentially transmitted.

Specifically, when a packet to which the TSN specific information belongs is mapped to a single DRB, it may be configured to preferentially transmit data in the DRB, so as to implement preferential transmission of the TSN specific information.

Specifically, mapping the data packet to which the TSN specific information belongs to an individual DRB, and preferentially transmitting data in the DRB corresponding to the data packet to which the TSN specific information belongs may include any one of the following items:

firstly, a target operation is performed on a logical channel corresponding to a DRB to preferentially transmit data in the DRB.

That is, the present embodiment may perform target operation on the logical channel corresponding to the DRB, so as to implement preferential transmission of data in the logical channel corresponding to the DRB, and further implement preferential transmission of data in the DRB.

When performing target operation on the logical channel corresponding to the DRB, the following method may be used:

ignoring scheduling restrictions on a logical channel corresponding to a DRB to preferentially transmit data within the DRB; alternatively, the first and second electrodes may be,

configuring the current uplink scheduling permission to be used by a logic channel corresponding to the DRB only so as to transmit data in the DRB preferentially; alternatively, the first and second electrodes may be,

and sequencing the logic channels to be transmitted at present according to the logic channel priority, and carrying out weighting operation on the logic channels corresponding to the DRB so as to transmit the data in the DRB preferentially.

That is, the present embodiment may configure the priority of the logical channel corresponding to the DRB as the highest priority in any manner.

Specifically, the scheduling restriction on the logical channel corresponding to the DRB may include restrictions on the PUSCH duration, the subcarrier spacing, the cell restriction, and the like, for example, the current uplink scheduling Grant (UL Grant) is only restricted to be used by the logical channel with the subcarrier spacing of 15 kHz; or the UL Grant is limited to the maximum PUSCH duration, so that the current UL Grant can be preferentially used by the logical channel corresponding to the DRB. In addition, the scheduling restriction on the logical channel corresponding to the DRB is ignored, that is, the scheduling restriction on the logical channel no longer plays a role in the logical channel corresponding to the DRB, and the logical channel corresponding to the DRB may not be scheduled according to the scheduling restriction but may be directly scheduled for transmission, so that data in the DRB can be preferentially transmitted.

In addition, specifically, in the Logical Channel Processing (LCP) restriction procedure, an LCP restriction parameter may be introduced to ensure the preferential transmission of TSN specific information. For example, the LCP restriction parameter may be an allowanon-gPTP parameter, and when the value of the allowanon-gPTP parameter is true (true), it indicates that the current uplink scheduling grant is only used by the logical channel corresponding to the DRB, so as to ensure that data in the DRB can be preferentially transmitted.

Of course, the indication may be added in Downlink Control Information (DCI) to perform dynamic scheduling of the LCP restriction parameter, or added in Radio Resource Control (RRC) signaling to perform Configuration Grant (CG) scheduling, which is not specifically limited herein.

In addition, specifically, the weighting operation performed on the logical channel corresponding to the DRB may be to increase the weight value of the logical channel corresponding to the DRB, for example, to increase the weight value of the logical channel corresponding to the DRB to be higher than the weight values of other logical channels, so as to preferentially transmit the data in the DRB, thereby ensuring the preferential transmission of the TSN specific information.

Secondly, the data packet to which the TSN specific information belongs is mapped into the DRB having the highest priority of the logical channel, so as to preferentially transmit the data in the DRB.

That is, in this manner, in the process of mapping the QoS flow to the DRB, the data packet to which the TSN specific information belongs may be directly mapped into the DRB having the highest priority of the logical channel, so that the data in the DRB can be preferentially transmitted, that is, the TSN specific information can be preferentially transmitted.

Thirdly, when the DRB mapped by the data packet to which the TSN specific information belongs corresponds to at least two Radio Link Control (RLC) entities, configuring the data in the DRB to be transmitted through the RLC entity with the highest priority of the logical channel, so as to preferentially transmit the data in the DRB.

That is, in this manner, in the process of mapping the QoS flow to the DRB, the data packet to which the TSN specific information belongs is mapped to a DRB having at least two RLC entities, where the DRB corresponds to a respective logical channel for each RLC entity, and at this time, the data in the DRB may be configured to be transmitted through the RLC entity having the highest priority of the logical channel, so as to implement preferential transmission of the data in the DRB, and ensure preferential transmission of the TSN specific information.

Fourthly, when the TSN specific information is distributed to different QoS flows of different Protocol Data Unit (PDU) sessions, the QoS flows corresponding to the TSN specific information in the different PDU sessions are mapped into the same DRB with the highest priority of the logical channel, so that the data in the DRB is transmitted preferentially.

That is, in this way, QoS streams corresponding to TSN specific information in different PDU sessions can be mapped into the same DRB with the highest priority of logical channels, so as to ensure that TSN specific information can be transmitted preferentially.

Therefore, the preferential transmission of the TSN specific information can be realized by any mode, so that the preferential transmission of TSN uplink time information or data in the 5G system after the TSN is fused with the 5G system is met, and the strict time delay requirement after the TSN is fused with the 5G system is ensured.

The present application will be specifically described below with reference to specific examples.

The first embodiment:

when the data packet to which the TSN specific information belongs and other data packets are allocated to the same DRB, the preferential transmission of the TSN specific information can be achieved by:

step 1, acquiring whether a current data packet carries an identifier of TSN specific information, where the identifier may be acquired through a Non-Access Stratum (NAS) layer, or acquired through identifying a type of the data packet through deep parsing, and may be represented by a variable Flag _ TSN. For example, when the Flag _ TSN takes a value of 1, it indicates that the corresponding packet carries TSN specific information, that is, carries TSN time synchronization information or data related to TSN time synchronization information; when the value is 0, it indicates that the corresponding data packet does not carry the TSN specific information, i.e. does not carry the time synchronization information or the data related to the TSN time synchronization information.

Step 2, in the current DRB, a data stream with a Flag _ tsn value of 1 and a data stream with a Flag _ tsn value of 0 correspond to each other, because the data stream is subsequently processed in a first-in first-out manner in the existing manner, as shown in fig. 2, the data stream with a Flag _ tsn value of 1 is restricted from being preferentially transmitted at this time. For this reason, the data stream with Flag _ TSN value of 1 may be specially processed, that is, a data packet to which TSN specific information belongs is preferentially transmitted when data in a DRB is allowed to be transmitted, specifically, see fig. 3, so that it can be ensured that the data packet to which TSN specific information belongs can be preferentially transmitted among a data packet to which TSN specific information allocated to the same DRB belongs and other data packets.

Second embodiment:

when a packet to which TSN specific information belongs is mapped to a separate DRB, preferential transmission of the TSN specific information can be achieved by:

step 1, which is the same as step 1 in the first embodiment, is not described herein again.

Step 2, as shown in fig. 4, regarding the logical channel containing Flag _ tsn whose value is 1, all scheduling restrictions on the logical channel are ignored, thereby implementing direct transmission.

The third embodiment:

Step 2, in the LCP restriction process, an LCP restriction parameter may be introduced to ensure the preferential transmission of TSN specific information, where the LCP restriction parameter may be allownon-gPTP. For example, after the terminal receives the UL Grant, the value of allownon-gPTP may be configured to be true to indicate that the current Grant is only used by the logical channel whose Flag _ tsn value is 1, as shown in fig. 5.

The fourth embodiment:

when TSN specific information is allocated to an individual QoS flow, preferential transmission of the TSN specific information can be achieved by:

step 1, the high layer sets the TSN specific information that needs to be transmitted preferentially as an individual QoS flow, and takes QoS _ TSN as an example for identification.

Step 2, in the mapping process of further flowing the QoS to the DRB, as shown in fig. 6, in the architecture of the Service Data Adaptation Protocol (SDAP) layer, the Packet Data Convergence Protocol (PDCP) layer, the Medium Access Control (MAC) layer, and the air interface (UU), directly mapping the QoS stream with QoS _ TSN to the DRB with the highest priority of the logical channel (the logical channel priority value is 1), that is, mapping the data packet to which the TSN specific information belongs to the DRB with the highest priority of the logical channel, so as to ensure that the information of the time synchronization related data of the TSN network can be preferentially transmitted.

Fifth embodiment:

Step 2, in the mapping process of further QoS flow to DRB, as shown in fig. 7, the QoS flow with QoS _ TSN is mapped to a DRB with at least two RLC entities, where the DRB corresponds to a respective logical channel for each RLC entity, where the priority of the RLC1 corresponding to the logical channel 1(LCH1) is 1 (highest level), and the priority of the RLC2 corresponding to the LCH2 is 2 (next highest level), in this embodiment, the data in the DRB is configured to be transmitted through the RLC entity with the highest priority of the logical channel, that is, transmitted on the LCH1, so as to ensure that the information of the time synchronization related data of the TSN network can be transmitted preferentially.

Sixth embodiment:

this embodiment corresponds to a scenario where TSN specific information is allocated to different QoS streams of different PDU sessions, and at this time, the preferential transmission of TSN specific information can be realized through the following steps:

Step 2, in the mapping process of further flowing the QoS to the DRB, as shown in fig. 8, the QoS flows with QoS _ TSN in different PDU sessions are mapped to the same DRB with the highest priority of the logical channel (the priority of the logical channel takes the value of 1), so as to ensure that the information of the time synchronization related data of the TSN network can be transmitted preferentially.

Seventh embodiment:

And 2, after the terminal receives the UL Grant, firstly, carrying out scheduling limitation operation of the current UL Grant, and after the operation is finished, sequencing the logic channels which are to be transmitted at present and contain data transmission of the current terminal according to the priority of the logic channels. As shown in fig. 9, in the LCHx _ ab (e.g., LCH2_21), x represents an LCH index, a represents a priority value of a logical channel, for example, a ═ 1 represents the highest priority, and the higher the value of a, the lower the priority, but of course, the lower the priority may be the smaller the value of a, that is, the setting manner of the priority is merely an example, and does not limit the embodiment; b represents whether the logical channel contains the TSN specific information, wherein b-1 represents that the logical channel contains the TSN specific information, and b-0 represents that the logical channel does not contain the TSN specific information; for the LCH1_10, LCH2_21 and LCH3_50, the order of sorting according to logical channel priority after the scheduling restriction operation is LCH2_21, LCH1_10 and LCH3_50, i.e. LCH2_21 has a higher priority than LCH1_10 and LCH1_10 has a higher priority than LCH3_ 50.

And 3, further weighting all the logical channels which are contained in the current terminal and have data transmission according to the Flag _ TSN in the step 1, for example, if the Flag _ TSN takes a value of 1, performing weighting operation on the logical channel with the Flag _ TSN taking a value of 1, for example, increasing the weight value of the logical channel with the Flag _ TSN taking a value of 1, so as to ignore the logical channel priority value in the step 2, and increasing the logical channel priority to ensure that the information of the time synchronization related data of the TSN network can be preferentially transmitted.

Thus, the foregoing embodiments can all implement preferential transmission of TSN time synchronization information or data related to the TSN time synchronization information, and solve the problem that in the prior art, when a TSN system master clock is located at a TSN terminal station, the system performance after the TSN and 5G systems are fused cannot meet actual requirements due to the fact that preferential transmission of TSN uplink timing information or data cannot be guaranteed at present, so that the preferential transmission of TSN uplink time synchronization information or related data in the 5G systems after the TSN and 5G systems are fused can be met, and the strict delay requirement after the TSN and 5G systems are fused is guaranteed.

Fig. 10 is a schematic structural diagram of a time synchronization apparatus according to an embodiment of the present application, and includes a memory 1020, a transceiver 1000, and a processor 1010.

Where in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1010 and various circuits of memory represented by memory 1020 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1000 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1010 in performing operations.

The processor 1010 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

A memory 1020 for storing a computer program; a transceiver 1000 for transceiving data under the control of the processor; a processor 1010 for reading the computer program in the memory and performing the following operations:

Optionally, the terminal detects time-sensitive network TSN specific information, which includes any one of the following:

when the terminal detects that the content of the current data packet contains the TSN specific information, determining to detect the TSN specific information;

and when the terminal detects that the QoS (quality of service) flow corresponding to the current data packet is the QoS flow to which the TSN specific information belongs, determining to detect the TSN specific information.

Optionally, the preferentially transmitting the TSN specific information includes:

allocating the data packet to which the TSN specific information belongs and other data packets to the same Data Radio Bearer (DRB), and preferentially transmitting the data packet to which the TSN specific information belongs when the data in the DRB is allowed to be transmitted; alternatively, the first and second electrodes may be,

and mapping the data packet to which the TSN specific information belongs to an individual DRB, and preferentially transmitting the data in the DRB corresponding to the data packet to which the TSN specific information belongs.

Optionally, the mapping the data packet to which the TSN-specific information belongs to a single DRB, and preferentially transmitting data in the DRB corresponding to the data packet to which the TSN-specific information belongs includes any one of:

performing target operation on the logical channel corresponding to the DRB to preferentially transmit the data in the DRB;

mapping the data packet to which the TSN specific information belongs into a DRB with the highest priority of a logical channel so as to preferentially transmit the data in the DRB;

when the DRB mapped by the data packet to which the TSN specific information belongs corresponds to at least two Radio Link Control (RLC) entities, configuring the data in the DRB to be transmitted through the RLC entity with the highest priority of the logical channel so as to transmit the data in the DRB preferentially;

when the TSN specific information is distributed to different QoS flows of different Protocol Data Unit (PDU) sessions, the QoS flows corresponding to the TSN specific information in the different PDU sessions are mapped into the same DRB with the highest priority of a logical channel so as to preferentially transmit data in the DRB.

Optionally, the performing a target operation on the logical channel corresponding to the DRB to preferentially transmit the data in the DRB includes:

ignoring scheduling restrictions on the logical channel corresponding to the DRB to preferentially transmit data in the DRB; alternatively, the first and second electrodes may be,

It can be seen from the above embodiments that, when the terminal detects the TSN specific information, the time synchronization device preferentially transmits the TSN specific information, so that the preferential transmission of the TSN uplink time synchronization information or the related data in the 5G system after the TSN and the 5G system are fused can be satisfied, thereby ensuring the strict delay requirement after the TSN and the 5G are fused.

Fig. 11 is a schematic structural diagram of a time synchronization apparatus according to an embodiment of the present application. The device includes:

a transmission module 1101, configured to preferentially transmit time sensitive network TSN specific information when the terminal detects the TSN specific information; wherein the TSN specific information includes TSN time synchronization information or data related to the TSN time synchronization information.

Optionally, based on the foregoing apparatus, the transmission module 1101 includes any one of the following units:

a first determining unit, configured to determine that the TSN specific information is detected when the terminal detects that the identifier of the TSN specific information is carried in the current data packet;

a second determining unit configured to determine that the TSN specific information is detected when the terminal detects that the content of the current packet includes the TSN specific information;

and a third determining unit, configured to determine that the TSN specific information is detected when the terminal detects that the QoS stream of the quality of service corresponding to the current packet is a QoS stream to which the TSN specific information belongs.

Optionally, based on the foregoing apparatus, the transmission module 1101 includes:

a first transmission unit, configured to allocate the data packet to which the TSN-specific information belongs and other data packets to a same data radio bearer DRB, and preferentially transmit the data packet to which the TSN-specific information belongs when transmission of data in the DRB is allowed; alternatively, the first and second electrodes may be,

and the second transmission unit is used for mapping the data packet to which the TSN specific information belongs to an individual DRB and preferentially transmitting the data in the DRB corresponding to the data packet to which the TSN specific information belongs.

Optionally, based on the foregoing apparatus, the second transmission unit includes any one of the following sub-units:

a first transmission subunit, configured to perform a target operation on a logical channel corresponding to the DRB, so as to preferentially transmit data in the DRB;

a second transmission subunit, configured to map a data packet to which the TSN specific information belongs into a DRB having a highest priority of a logical channel, so as to preferentially transmit data in the DRB;

a third transmission subunit, configured to configure, when at least two radio link control, RLC, entities correspond to a DRB to which a packet to which the TSN-specific information belongs, the data in the DRB to be transmitted by an RLC entity having a highest priority of a logical channel, so as to transmit the data in the DRB preferentially;

and a fourth transmission subunit, configured to map, when the TSN specific information is allocated to different QoS streams of different protocol data unit PDU sessions, QoS streams corresponding to the TSN specific information in different PDU sessions into the same DRB having the highest priority of a logical channel, so as to preferentially transmit data in the DRB.

Optionally, based on the above device, the first transmission subunit is configured to,

It can be seen from the above embodiments that, in a time synchronization device, when detecting TSN specific information, a transmission module preferentially transmits the TSN specific information, so that the preferential transmission of TSN uplink time synchronization information or related data in a 5G system after the TSN and the 5G system are fused can be satisfied, and the strict delay requirement after the TSN and the 5G system are fused is ensured.

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should be noted that the apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

On the other hand, the embodiment of the present application further provides a processor-readable storage medium, where a computer program is stored, and the computer program is used to enable the processor to execute the method described in the foregoing embodiment.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.

As can be seen from the above embodiments, a processor-readable storage medium stores a computer program for causing the processor to execute the above time synchronization method. Therefore, the embodiment of the application realizes the preferential transmission of the TSN time synchronization information or the related data.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method of time synchronization, comprising:

2. The time synchronization method according to claim 1, wherein the terminal detects time-sensitive network (TSN) specific information, which comprises any one of the following items:

3. The method for time synchronization according to claim 1, wherein the prioritizing transmission of the TSN specific information comprises:

4. The method according to claim 3, wherein the mapping the data packet to which the TSN-specific information belongs to a single DRB and preferentially transmitting the data in the DRB corresponding to the data packet to which the TSN-specific information belongs includes any one of:

5. The method according to claim 4, wherein the performing the target operation on the logical channel corresponding to the DRB to preferentially transmit the data in the DRB comprises:

6. A time synchronization apparatus, comprising a memory, a transceiver, a processor:

7. The time synchronizer according to claim 6, wherein the terminal detects time sensitive network TSN specific information, which comprises any one of the following items:

8. The time synchronizer of claim 6, wherein the prioritizing transmission of the TSN specific information comprises:

9. The apparatus according to claim 8, wherein the mapping of the data packet to which the TSN-specific information belongs to a single DRB and the preferential transmission of data in the DRB corresponding to the data packet to which the TSN-specific information belongs includes any one of:

10. The apparatus according to claim 9, wherein the performing the target operation on the logical channel corresponding to the DRB to preferentially transmit the data in the DRB comprises:

11. A time synchronization apparatus, comprising:

12. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to perform the method of any one of claims 1 to 5.