A new collision-free media access protocol for metro OBS ring networks

2006 ◽  
Author(s):  
Sunghoon Jung ◽  
Minho Kang
Keyword(s):  
Ring Networks ◽  
Media Access ◽  
Access Protocol ◽  
Free Media

DQDB/sup +/-/: a fair and waste-free media access protocol for dual bus metropolitan networks

1993 ◽  
Vol 41 (12) ◽  
pp. 1805-1815 ◽  
Author(s):  
I.F. Akyildiz ◽  
J. Liebeherr ◽  
A.N. Tantawi
Keyword(s):  
Media Access ◽  
Access Protocol ◽  
Metropolitan Networks ◽  
Free Media

scholarly journals Hardware Support to Minimize the End-to-End Delay in Ethernet-Based Ring Networks

Electronics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1097
Author(s):  
Tomás P. Corrêa ◽  
Luis Almeida
Keyword(s):  
Media Access Control ◽  
Hardware Accelerators ◽  
Ring Networks ◽  
Ring Network ◽  
Media Access ◽  
Factory Automation ◽  
Cycle Times ◽  
End To End Delay ◽  
Packet Length ◽  
Networking Technology

Ethernet is a popular networking technology in factory automation and industrial embedded systems, frequently using a ring topology for improved fault-tolerance. As many applications demand ever shorter cycle times and a higher number of nodes, the popular ring endure to remain as a valid topology. In this work, we discuss the factors that determine the ring network delay and show how they affect the network cycle time. Since increasing the link capacity has limited reach, we explore a time-triggered protocol that brings the nodes forwarding delay near to the physical layer delay. Additionally, we propose hardware accelerators based on FPGA technology that minimise the packet reception delay from physical reception to delivery to an application handler, preserving Ethernet layers and being compatible with its standard. This paper explains the accelerators concept and implementation, presents measurements using standard Media Access Control implementations, and shows the solution effectiveness with experimental results. We achieved a delay, from physical reception to the triggering of a user-level handler, of 1.1 µs independent of the packet length.

Experimental demonstration of a novel media access protocol for HORNET: a packet-over-WDM multiple-access MAN ring

2000 ◽  
Vol 12 (9) ◽  
pp. 1264-1266 ◽  
Author(s):  
I.M. White ◽  
M.S. Rogge ◽  
K. Shrikhande ◽  
Y. Fukashiro ◽  
D. Wonglumsom ◽  
...  
Keyword(s):  
Multiple Access ◽  
Experimental Demonstration ◽  
Media Access ◽  
Access Protocol
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