KR-102963638-B1 - METHOD AND APPARATUS FOR CONFIGURING STATIC PORT IN SYSTEM SUPPORTING TIME SENSITIVE COMMUNICATION

KR102963638B1KR 102963638 B1KR102963638 B1KR 102963638B1KR-102963638-B1

Abstract

A static port configuration method is provided in the TSN AF (Application Function) of a system operating as a TSN (Time Sensitive Networking) bridge. The static port configuration method determines a grand master clock according to a received requirement, configures a time synchronization spanning tree with the grand master clock as the root, and determines the port status of the DS-TT (Device side TSN Translator) operating as a terminal-side bridge port in the system and the NW-TT (Network side) operating as a network-side bridge port through the determination of their roles.

Inventors

김경수
강유화
김창기

Assignees

한국전자통신연구원

Dates

Publication Date: 20260513
Application Date: 20210406
Priority Date: 20200929

Claims (10)

In a method for configuring static ports in a TSN Application Function (ATN AF) of a system operating as a TSN (Time Sensitive Networking) bridge, A step of receiving information for determining the master clock from an external application via a network exposure function (NEF); and A step of determining a grand master clock and determining the port status of the system as master or slave based on the received information and local policies for the ports of the system; The above local policy is a static port configuration method including priority information of master clocks.
In claim 1, the step of determining the grand master clock according to the local policy is a static port configuration method that selects either the 5G system internal clock or the external TSN clock as the grand master clock based on the local policy.
A static port configuration method according to claim 1, wherein the information for determining the master clock includes at least one of a list of grand master clocks or information such as a grand master selected and transmitted by an external application.
A static port configuration method according to claim 1, wherein the local policy further includes policy information for updating the grand master clock by comparing the priority of the current grand master clock with the priority of a new master clock.
In claim 1, the local policy is a static port configuration method received through OAM (operation administration and maintenance).
In a device for configuring a static port in a TSN Application Function (ATN AF) of a system operating as a TSN (Time Sensitive Networking) bridge, The above device includes at least one processor, and The above at least one processor is, A device that receives information for determining a master clock from an external application via a network exposure function (NEF); determines a grand master clock and determines the status of the ports of the system as master or slave based on the received information and a local policy for the ports of the system; wherein the local policy includes priority information of the master clocks.
In claim 6, the at least one processor is a device that selects either the 5G system internal clock and the external TSN clock as the grand master clock based on the local policy in order to determine the grand master clock according to the local policy.
In claim 6, A device comprising at least one of the following information for determining the above master clock: a list of grand master clocks, or information such as a grand master selected and transmitted by an external application.
The apparatus of claim 6, wherein the local policy further includes policy information for updating the grand master clock by comparing the priority of the current grand master clock with the priority of the new master clock.
In claim 6, the local policy is a device received through OAM (operation administration and maintenance).

Description

Method and apparatus for configuring a static port in a system supporting time-sensitive communication The present invention relates to a method and apparatus for configuring a static port in a system supporting time-sensitive communication, and more specifically, to a method and apparatus for configuring a static port in a system supporting time-sensitive communication for determining a grand master clock and configuring a time-synchronized spanning tree to support time-sensitive communication in a 5th Generation (5G) system. The 5th generation (5G) system operates as a single logical Time Sensitive Networking (TSN) bridge to support time-sensitive communication (TSC) through interoperability with the TSN network. To this end, components of a TSN Application Function (AF), Device Side TSN Translator (DS-TT), and Network Side TSN Translator (NW-TT) have been added to the conventional 5G system. Existing TSN networks support time synchronization based on IEEE 802.1AS. They determine the grand master clock based on the Precision Time Protocol (PTP) and construct a time-synchronization spanning tree with the determined grand master clock as the root. Through the constructed time-synchronization spanning tree, they support time synchronization among all entities without the occurrence of loops. The grand master clock determination and time synchronization spanning tree configuration methods defined in IEEE 802.1AS include a dynamic configuration method that automatically determines the grand master clock through the Best Master Clock Algorithm (BMCA) based on PTP Announce messages and configures a time synchronization spanning tree using it as the root, and a static configuration method that manually determines the grand master clock through external port configuration and configures a time synchronization spanning tree using it as the root. 5G systems are defined to support IEEE 802.1AS in DS-TT and NW-TT to support grand master clock determination and time synchronization spanning tree configuration along with interoperability with TSN networks. As such, while 5G systems are described to support grand master determination and time synchronization spanning tree configuration through BMCA, clear configuration and specific execution methods are not yet specified. The recent 5G standard, Release-16, specifies that DS-TT and NW-TT can configure ports locally, but this is a method for determining the grand master clock and configuring port states through pre-configuring DS-TT and NW-TT. There is no specific definition regarding the operation in which the role of the DS-TT and NW-TT ports must be determined based on the position of the determined grand master clock. FIG. 1 is a diagram showing an extended 5G system structure for supporting time-sensitive communication according to an embodiment. FIG. 2 is a diagram illustrating a method for providing a static port configuration of a TSN AF according to an embodiment. Figure 3 is a diagram showing the internal configuration of a TSN AF according to an embodiment. FIG. 4 is a diagram illustrating a procedure for transmitting external port configuration information according to one embodiment. FIG. 5 is a diagram illustrating a procedure for transmitting external port configuration information according to another embodiment. FIG. 6 is a diagram illustrating a procedure for transmitting external port configuration information according to another embodiment. FIG. 7 is a drawing showing a static port configuration device according to one embodiment. Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement them. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals. Throughout the specification and claims, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Now, a static port configuration method and device in a system supporting time-sensitive communication according to an embodiment will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an extended 5G system structure for supporting time-sensitive communication according to an embodiment. Referring to FIG. 1, the 5G system (100) operates as a TSN bridge for integration with an external TSN network. At this time, for mutual operation between the TSN network and the 5G system (100), the 5G system (100) has a structure in which a TSN translator and a TSN AF (Application Function) (114) are added. At this time, the UE (User Equipment) (102), (R)AN [(Radio) Access Net