2021 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS)最新文献

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GPS/GNSS independent Time Transfer over Telco IP Core Networks using DTM overlay GPS/GNSS独立时间传输在电信IP核心网使用DTM覆盖

2021 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS) Pub Date : 2021-10-27 DOI: 10.1109/ispcs49990.2021.9615348

Umut Keten

{"title":"GPS/GNSS independent Time Transfer over Telco IP Core Networks using DTM overlay","authors":"Umut Keten","doi":"10.1109/ispcs49990.2021.9615348","DOIUrl":"https://doi.org/10.1109/ispcs49990.2021.9615348","url":null,"abstract":"A major part of the 5G evolution is meeting the required phase and frequency demands. Networks based on time division duplex (TDD) and C-RAN and in the future, other techniques require accurate phase and frequency synchronization.Operators are trying to design networks capable of delivering these demands. To prepare 5G base stations requires very high accuracy on clocking, to a maximum of 1.5 microseconds.With these requirements, the use of PTP (Precision Time Protocol) for phase and time distribution was developed by IEEE (1588 and 1588v2).To meet the requirements for 5G, full timing support (FTS) using G.8275.1 is recommended, meaning all network elements in the network need to be upgraded or replaced. This can be a huge cost for an operator since current Telco Networks still have large portions of legacy equipment. Turk Telekom has also realized, this is not only applicable for the IP/MPLS routers, but also requires underlying optical nodes such as DWMD multiplexers to support PTP and not introduce jitter and asymmetric delays. Thus, significant investments would need to be made to meet the requirements of having full timing support in all nodes.Due to these required huge CAPEX investments, we have developed and tested a new approach that requires only a fraction of the CAPEX needed. Our approach to solving this critical issue for our 5G rollout will be to create a synchronization network overlay using a DTM layer over IP/MPLS networks which we have tested successfully on our live WAN IP/MPLS network without using any additional timing support. We call this Time Transfer overlay solution a Precise Timing Network.","PeriodicalId":186103,"journal":{"name":"2021 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134351684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time error analysis of 5G time synchronization solutions for time aware industrial networks 面向时间感知工业网络的5G时间同步解决方案时间误差分析

2021 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS) Pub Date : 2021-10-27 DOI: 10.1109/ispcs49990.2021.9615318

Dhruvin Patel, J. Diachina, Stefano Ruffini, M. D. Andrade, J. Sachs, D. Venmani

{"title":"Time error analysis of 5G time synchronization solutions for time aware industrial networks","authors":"Dhruvin Patel, J. Diachina, Stefano Ruffini, M. D. Andrade, J. Sachs, D. Venmani","doi":"10.1109/ispcs49990.2021.9615318","DOIUrl":"https://doi.org/10.1109/ispcs49990.2021.9615318","url":null,"abstract":"Time synchronization is one of the main building blocks for IEEE 802.1 Time Sensitive Network (TSN) based time aware industrial networks. 3rd generation partnership project (3GPP) has proposed new mechanisms in Release 16 in order for the 5G system (5GS) to interwork with Time Sensitive Networks (TSN). In this context, 3GPP has modelled the 5GS as IEEE 802.1AS time aware system in an integrated 5G-TSN network. The most demanding time synchronization error budget applicable to a 5GS (i.e., the 5G system end-to-end time error budget) used within the context of an integrated 5G-TSN network can be as lows as 900ns. Within the 5GS the radio link between a base station and user equipment (UE) is subject to propagation delay and the uncertainty associated with its estimation is considered to have a major contribution towards the 5GS error budget. This paper presents an end-to-end (E2E) analysis on the time synchronization solutions offered by the 5GS in the context of an integrated 5G-TSN network. Furthermore, the paper provides an in-depth analytical evaluation of propagation delay errors introduced based on two different propagation delay estimation methods.","PeriodicalId":186103,"journal":{"name":"2021 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124995419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

ISPCS 2021 Author Index ISPCS 2021作者索引

2021 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS) Pub Date : 2021-10-27 DOI: 10.1109/ispcs49990.2021.9615278

引用次数: 0

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