| Presentation | 2019-03-08 A Time Synchronization Scheme on Grandmaster Switching for IEEE802.1AS Taichi Sakaue, Osamu Toyama, Daisuke Osagawa, Teruaki Ito, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, IEEE802.1 TSN (Time Sensitive Networking) is being applied for industrial networks which is used in automotive systems and factory automation (FA) systems. TSN is a suite of protocols which improve real time performance (isochronous performance) and network redundancy for requirements of industrial networks. In TSN, network nodes synchronize their time each other to control timing of frame forwarding. IEEE802.1AS standardizes a time synchronization protocol of TSN. In IEEE802.1AS, a grandmaster delivers reference time to the other nodes in a system. And the nodes synchronize to the reference time. A grandmaster is selected by Best Master Clock Algorithm (BMCA) selects a node which has the highest grandmaster priority as a grandmaster. While, the node who has the highest priority is newly connected to in operation, it becomes grandmaster. Then if that grandmaster has reference time which is different from the current one, time leap occurs in the other nodes. Then this system can’t control in real time because of a temporary gap of communication timing. Therefore, we propose a grandmaster switching scheme to prevent time leap and out of synchronization in a system. Theoretical analysis confirms that the proposed scheme is effective to mitigate a discontinuity in the time base. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | IEEE802.1AS / Synchronization |
| Paper # | CAS2018-144,CS2018-112 |
| Date of Issue | 2019-03-01 (CAS, CS) |
| Conference Information | |
| Committee | CAS / CS |
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| Conference Date | 2019/3/8(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Shonan Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Network processor, Signal processing and circuits for communications, Wireless LAN / PAN, etc. |
| Chair | Hideaki Okazaki(Shonan Inst. of Tech.) / Hidenori Nakazato(Waseda Univ.) |
| Vice Chair | Taizo Yamawaki(Hitachi) / Jun Terada(NTT) |
| Secretary | Taizo Yamawaki(Shonan Inst. of Tech.) / Jun Terada(Hitachi) |
| Assistant | Motoi Yamaguchi(Renesas Electronics) / Kazutaka Hara(NTT) / Kentaro Toyoda(Keio Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Circuits and Systems / Technical Committee on Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Time Synchronization Scheme on Grandmaster Switching for IEEE802.1AS |
| Sub Title (in English) | |
| Keyword(1) | IEEE802.1AS |
| Keyword(2) | Synchronization |
| 1st Author's Name | Taichi Sakaue |
| 1st Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 2nd Author's Name | Osamu Toyama |
| 2nd Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 3rd Author's Name | Daisuke Osagawa |
| 3rd Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 4th Author's Name | Teruaki Ito |
| 4th Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| Date | 2019-03-08 |
| Paper # | CAS2018-144,CS2018-112 |
| Volume (vol) | vol.118 |
| Number (no) | CAS-488,CS-489 |
| Page | pp.pp.33-37(CAS), pp.33-37(CS), |
| #Pages | 5 |
| Date of Issue | 2019-03-01 (CAS, CS) |