Circuit emulation services over ethernet-part 2: prototype and experimental results

ABSTRACT

This paper describes a prototype implementation and experimental results for unstructured circuit emulation service (UCES) of T3 data stream over Ethernet. As explained in Part 1 of this paper, packet-switched networks such as Ethernet are not designed to transport TDM data and so have no inherent clock distribution and synchronization mechanisms. Thus, to allow the frequency of the source TDM stream to be regenerated at the receiver, the prototype employed the clock synchronization scheme described in Part 1 of this paper. Our experiments showed that the recovered clock conforms to ITU-T G.824 requirements even for networks that introduce high jitter and packet loss.

REFERENCES

• 1: James Aweya , Michel Ouellette , Delfin Y. Montuno , Kent Felske, Circuit emulation services over ethernet-part 1: clock synchronization using timestamps, International Journal of Network Management, v.14 n.1, p.29-44, January 2004 [doi>10.1002/nem.505]
• 2: 2. ITU-T G.824-1993, Control of jitter and wander within digital networks which are based on the 1544 kbit/s Digital Hierarchy.
• 3: 3. ATM Forum af-vtoa-0078.000, Circuit emulation service interoperability specification version 2.0. January 1997.
• 4: 4. Vainshtein A, Stein Y, Sasson I, Sadovski A, Metz E, Frost T, Pate P. Unstructured TDM circuit emulation service over packet switched network (UCESoPSN). Work in progress, IETF.

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.3 Network Operations
          Subjects: Network management

Additional Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.1 Network Architecture and Design
          Subjects: Packet-switching networks
      C.2.5 Local and Wide-Area Networks
          Subjects: Ethernet (e.g., CSMA/CD)
  C.4 PERFORMANCE OF SYSTEMS
      Subjects: Performance attributes; Fault tolerance; Reliability, availability, and serviceability

General Terms:
Design, Management, Performance, Reliability