Dr. Meng Ji Profile

Dr. Meng Ji

at Huazhong Univ of Science and Technology

SPIE Involvement:

Author

Publications (10)

Proceedings Article | 19 November 2008 Paper

A rapid protection switching method in carrier ethernet ring networks

Liang Yuan, Meng Ji

Proceedings Volume 7137, 713711 (2008) https://doi.org/10.1117/12.804155

KEYWORDS: Switching, Networks, Databases, Local area networks, Reliability, Failure analysis, Logic, Detection and tracking algorithms, Switches, Electroactive polymers

Read Abstract +

Abstract: Ethernet is the most important Local Area Network (LAN) technology since more than 90% data traffic in access layer is carried on Ethernet. From 10M to 10G, the improving Ethernet technology can be not only used in LAN, but also a good choice for MAN even WAN. MAN are always constructed in ring topology because the ring network could provide resilient path protection by using less resource (fibre or cable) than other network topologies. In layer 2 data networks, spanning tree protocol (STP) is always used to protect transmit link and preventing the formation of logic loop in networks. However, STP cannot guarantee the efficiency of service convergence when link fault happened. In fact, convergent time of networks with STP is about several minutes. Though Rapid Spanning Tree Protocol (RSTP) and Multi-Spanning Tree Protocol (MSTP) improve the STP technology, they still need a couple of seconds to achieve convergence, and can not provide sub-50ms protection switching. This paper presents a novel rapid ring protection method (RRPM) for carrier Ethernet. Unlike other link-fault detection method, it adopts distributed algorithm to detect link fault rapidly (sub-50ms). When networks restore from link fault, it can revert to the original working state. RRPM can provide single ring protection and interconnected ring protection without the formation of super loop. In normal operation, the master node blocks the secondary port for all non-RRPM Ethernet frames belonging to the given RRPM Ring, thereby avoiding a loop in the ring. When link fault happens, the node on which the failure happens moves from the "ring normal" state to the "ring fault" state. It also sends "link down" frame immediately to other nodes and blocks broken port and flushes its forwarding database. Those who receive "link down" frame will flush forwarding database and master node should unblock its secondary port. When the failure restores, the whole ring will revert to the normal state. That is block secondary port on master node for loop avoidance. Ethernet rings may be interconnected through dual nodes with a shared link. In this case, we should fix that which ring on the share link is ctrl-ring, and only ctrl-ring can deal with the failure happens on the share link. Carrier Ethernet is an alternative for traditional MAN technologies. Ethernet ring network which can make CE more reliable is one of the hottest topics in recently years. RRPM can provide protection switching in sub-50ms and process link fault on single ring and interconnected rings.

Proceedings Article | 28 September 2006 Paper

Revenue-based quality of protection in MSR networks

Yichun Zhan, Meng Ji, Shaohua Yu

Proceedings Volume 6354, 63543S (2006) https://doi.org/10.1117/12.691743

KEYWORDS: Silver, Systems modeling, Gold, Network architectures, Embedded systems, Bismuth, Video, Optical networks, Laser sintering, Statistical multiplexing

Read Abstract +

Proceedings Article | 28 September 2006 Paper

MSR: a multi-service provisioning implementation in metro network based on RPR

Yichun Zhan, Meng Ji, Shaohua Yu

Proceedings Volume 6354, 63543R (2006) https://doi.org/10.1117/12.691707

KEYWORDS: Signal processing, Time division multiplexing, Process control, Video, Device simulation, Switches, Performance modeling, Power supplies, Interfaces, Standards development

Read Abstract +

Proceedings Article | 6 December 2005 Paper

Parallelized control protocols for high-performance routers

Shao-hua Yu, Ji Meng

Proceedings Volume 6022, 60222L (2005) https://doi.org/10.1117/12.631501

KEYWORDS: Process control, Plutonium, Control systems, Signal processing, Data processing, Switches, Network architectures, Databases, Computer architecture, Internet

Read Abstract +

Proceedings Article | 6 December 2005 Paper

A cost-effective and fast recovery mechanism for multi-ring interconnection networks based on RPR

Yichun Zhan, Meng Ji, Shaohua Yu

Proceedings Volume 6022, 60222D (2005) https://doi.org/10.1117/12.635951

KEYWORDS: Networks, Switches, Standards development, Switching, Light, Bridges, Receivers, Autoregressive models, Local area networks, Reliability

Read Abstract +

Proceedings Article | 6 December 2005 Paper

EROS: an extensible software platform for network processor unit based routers

Ji Meng, Shao-hua Yu

Proceedings Volume 6022, 60222N (2005) https://doi.org/10.1117/12.631964

KEYWORDS: Networks, Control systems, Signal processing, Human-machine interfaces, Computing systems, Switching, Computer architecture, Environmental management, Software development, Data modeling

Read Abstract +

Proceedings Article | 8 February 2005 Paper

An innovative packet process methodology: policy-based flow switching

Meng Ji, Shaohua Yu

Proceedings Volume 5626, (2005) https://doi.org/10.1117/12.573436

KEYWORDS: Switching, Pulmonary function tests, Process control, Switches, Internet, Fermium, Frequency modulation, Networks, Network architectures, Line edge roughness

Read Abstract +

Proceedings Article | 18 February 2002 Paper

Time-varying feedback stabilization of tracked mobile robot

Meng Ji, Zhenguo Sun, Junbo Wang, Qiang Chen

Proceedings Volume 4573, (2002) https://doi.org/10.1117/12.457447

KEYWORDS: Control systems, Mobile robots, Magnetic tracking, Magnetism, Kinematics, Actuators, Optical spheres, Feedback control, Device simulation, Systems modeling

Read Abstract +

Proceedings Article | 18 February 2002 Paper

Robust backstepping control of tracked mobile robot

Meng Ji, Zhenguo Sun, Junbo Wang, Qiang Chen

Proceedings Volume 4573, (2002) https://doi.org/10.1117/12.457448

KEYWORDS: Mobile robots, Device simulation, Kinematics, Control systems, Feedback control, Magnetism, Motion models, Motion controllers, Direct methods, Magnetic tracking

Read Abstract +

Proceedings Article | 18 February 2002 Paper

Intelligent wheeled mobile robot for spherical tank welding

Junbo Wang, Zhenguo Sun, Meng Ji, Qiang Chen, Lipei Jiang, Xiangdong Jiao, Long Xue

Proceedings Volume 4573, (2002) https://doi.org/10.1117/12.457449

KEYWORDS: CCD image sensors, Spherical lenses, Sensors, Charge-coupled devices, Mobile robots, Visualization, Signal processing, Optical tracking, Control systems, Intelligent sensors

Read Abstract +

Showing 5 of 10 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years