# US 2022/0046570 A1 · Method and device for supporting configuration of time synchronization network in mobile communication network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0046570 A1 - Document ID: US20220046570A1 - Status: Published application - Kind: A1 - Application number: 17/396,990 - Filed: 2021-08-09 - Published: 2022-02-10 - Earliest claimed: 2020-08-10 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Sangjun MOON; Yoonseon HAN - Web page: https://patentgrep.com/patent/US20220046570A1 ## CPC - H04W 56/0015: {one node acting as a reference for the others} - H04J 3/0641: {Change of the master or reference, e.g. take-over or failure of the master} - H04J 3/0644: {External master-clock} - H04J 3/0667: {Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays (arrangements for monitoring round trip delays in packet switching networks H04L43/0864)} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) ## Abstract The disclosure relates to a communication method and system for converging a 5G communication system for supporting higher data rates beyond a 4G system with a technology for IoT. A method of a NW-TT is provided. The method includes receiving a first announce message via user plane from a first DS-TT using a first PDU session between the NW-TT and the first DS-TT, receiving a second announce message from a N6 interface, determining port states for each port of the first DS-TT and the NW-TT with the first and second announce message using a BMCA procedure, if GM is external to a time synchronization network, generating a third announce message based on the first and second announce message for each master port in the first DS-TT and the NW-TT, and transmitting the third announce message to the first PDU session related to the master port in the first DS-TT. ## Claims ### Claim 1 A method of a network side time synchronization network (TSN) translator (NW-TT) comprising: receiving a first announce message via user plane from a first device side TSN translator (DS-TT) using a first packet data unit (PDU) session between the NW-TT and the first DS-TT; receiving a second announce message from a N6 interface; determining port states for each port of the first DS-TT and the NW-TT with the first announce message and the second announce message using a best master clock algorithm (BMCA) procedure; if grandmaster clock (GM) is external to a time synchronization network including the NW-TT and the first DS-TT, generating a third announce message based on the first announce message and the second announce message for each master port in the first DS-TT and the NW-TT; and transmitting the third announce message to the first PDU session related to the master port in the first DS-TT. ### Claim 2 (depends on 1) The method of claim 1, further comprising: performing PDU session establishment procedure for an Ethernet with the DS-TT for generating the first PDU session between the NW-TT and the first DS-TT. ### Claim 3 (depends on 1) The method of claim 1, wherein the first announce message and the second announce message are periodically received. ### Claim 4 (depends on 1) The method of claim 1, wherein the determining of the port states comprises: identifying a first GM related to the first announce message; identifying a second GM related to the second announce message; comparing a priority of the first GM and a priority of the second GM; and determining the port states for each port of the first DS-TT and the NW-TT based on the comparison. ### Claim 5 (depends on 1) The method of claim 1, further comprising: receiving a fourth announce message via the user plane from a second DS-TT using a second PDU session between the NW-TT and the second DS-TT, wherein the fourth announce message is not related to any GM. ### Claim 6 (depends on 1) The method of claim 1, further comprising: monitoring whether a receipt timeout event occurs for a slave port in the NW-TT; and upon detection of the receipt timeout event, re-evaluating the port states for each port of the first DS-TT and the NW-TT. ### Claim 7 (depends on 6) The method of claim 6, wherein the receipt timeout event occurs when no announce message is received until a receipt timeout timer expires. ### Claim 8 (depends on 6) The method of claim 6, wherein the receipt timeout event occurs when a number of times that no announce message is received until a receipt timeout timer expires reaches predetermined number. ### Claim 9 (depends on 1) The method of claim 1, wherein the NW-TT is included in a user plane function (UPF) entity, and wherein the first DS-TT is included in a user equipment (UE). ### Claim 10 (depends on 1) The method of claim 1, wherein the generating the third announce message comprises: determining an announce interval for the third announce message using a time synchronization information included in a bridge management information container (BMIC) obtained from a TSN application function (AF). ### Claim 11 A network side time synchronization network (TSN) translator (NW-TT) comprising: a plurality of ports comprising a first port and a second ports; and a processor configured to: control the first port of the plurality of the ports to receive a first announce message via user plane from a first device side TSN translator (DS-TT) using a first packet data unit (PDU) session between the NW-TT and the first DS-TT, control the second port of the plurality of the ports to receive a second announce message from a N6 interface, determine port states for each port of the first DS-TT and the NW-TT with the first announce message and the second announce message using a best master clock algorithm (BMCA) procedure, if grandmaster clock (GM) is external to a time synchronization network including the NW-TT and the first DS-TT, generating a third announce message based on the first announce message and the second announce message for each master port in the first DS-TT and the NW-TT, and control the first port of the plurality of the ports to transmit the third announce message to the first PDU session related to the master port in the first DS-TT. ### Claim 12 (depends on 11) The NW-TT of claim 11, wherein the processor is further configured to: perform PDU session establishment procedure for an Ethernet with a DS-TT for generating the first PDU session between the NW-TT and the first DS-TT. ### Claim 13 (depends on 11) The NW-TT of claim 11, wherein the first announce message and the second announce message is periodically received. ### Claim 14 (depends on 11) The NW-TT of claim 11, wherein the processor is configured to: identify a first GM related to the first announce message, identify a second GM related to the second announce message, compare a priority of the first GM and a priority of the second GM, and determine the port states for each port of the first DS-TT and the NW-TT based on the comparison. ### Claim 15 (depends on 11) The NW-TT of claim 11, wherein the plurality of the ports further comprise a third port, and wherein the processor is further configured to control the third port of the plurality of the ports to receive a fourth announce message via the user plane from a second DS-TT using a second PDU session between the NW-TT and the second DS-TT, and wherein the fourth announce message is not related to any GM. ### Claim 16 (depends on 11) The NW-TT of claim 11, wherein the processor is further configured to: monitor whether a receipt timeout event occurs for a slave port in the NW-TT; and upon detection of the receipt timeout event, re-evaluate the port states for each port of the first DS-TT and the NW-TT. ### Claim 17 (depends on 16) The NW-TT of claim 16, wherein the receipt timeout event occurs when no announce message is received until a receipt timeout timer expires. ### Claim 18 (depends on 16) The NW-TT of claim 16, wherein the receipt timeout event occurs when a number of times that no announce message is received until a receipt timeout timer expires reaches predetermined number. ### Claim 19 (depends on 11) The NW-TT of claim 11, wherein the NW-TT is included in a user plane function (UPF) entity, and wherein the first DS-TT is included in a user equipment (UE). ### Claim 20 (depends on 11) The NW-TT of claim 11, wherein, when generating the third announce message, the processor is configured to: determine an announce interval for the third announce message using a time synchronization information included in a bridge management information container (BMIC) obtained from a TSN application function (AF).