Universal Ethernet Telecommunications Service (UETS)

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Universal Ethernet Telecommunications Service (UETS)

J Herrero
Hi to all,

I want to share with you a project under way called UETS that was idea of one of my networking teachers here in Spain, Jose Morales, an engineer that participates in the LAN & MAN commitees of IEEE 802.3.

It's quite revolutionary and perhaps Theo and the rest of the experts may see aspects in which OpenBSD could implement this developing standard.

You can see all the papers (some in english) in this url: http://www.lmdata.es/uets.htm. I think it will be interesting to some of you.

Here are some comments about the papers by Jose Morales himself:

Following are a commented relation of the papers I've published with the description of UETS, in order to make easier for  you to understand the system. Its main characteristic is its extreme simplicity, being based on standards already existing and proved.

From "Computer Networks" to the "Computer on Net" (http://www.lmdata.es/uets/uets-gcn.pdf) published in the  IEEE Communications Magazine / Global Communications Newsletter, pp. 2-4, October 2005 (http://www.comsoc.org/pubs/gcn/gcn1005.html). This paper describes the basic Architecture of the UETS system, which offers an HDLC interface over a physical switching network. It is well known the HDLC congestion and flow control capability, but to do that it needs to operate over physical circuits (circuit switching, co-cs) or physical packet switching, like the described in this paper. In summary, this paper is fundamental to understand the next one. This paper (they call it Ethernet Everywhere, http://www.internetmark2.org/study/resources.html) also serve as a reference to the Internet Mark 2 Project (http://www.internetmark2.org), one of whose objectives is to advise the United Nations and the International Telecommunications Union for the development of Internet.

A technical paper: A new Communications Architecture and Switching Paradigm (http://www.lmdata.es/uets/uets-cm1.pdf), describes the switching architecture that uses Ethernet for delivering the various services. It is a manuscript submitted to IEEE CommMag, which is the first of two parts. The second part:  A new Paradigm for Ethernet Telecommunications Services and its Transport in NG SDH/SONET, in preparation, addresses the admission control and QoS based in the LLC protocol control capabilities, which provides four types of service: CBR flows, rt-VBR, nrt-VBR and Best Effort. It describes also the transport of the different services over Next Generation SDH/SONET using a new GFP mechanism, combination of GFP-F and GFP-T. To understand the fundamentals of the control mechanisms, you have to see the Figure 2 of the paper From "Computer Networks" to the "Computer on Net": the interface of the network can use the LLC or TCP/IP protocol stacks.

* The LLC-1 protocol provides the real time interface, that can be associated with:

- NG SDH/SONET circuits for CBR flows (for example E1 emulation)
- GFP to rt-VBR (for example Video on Demand)

* The LLC-2 protocol provides nrt-VBR, an only operates over GFP.

* The TCP/IP stack using ETYPE provides the Best Effort services.

* There are also the LLC-3 protocol, that can be used in multiprocessor systems or specific types of HDX traffic.

In UETS, the coupling with topology is with the switching addressing, that shouldn't be related with the network addressing. In the communications nodes, there is always needed an internal physical addresses to perform the routing of the packets, cells or frames. Those are mapped with the external addresses by means of the switching tables. In this way, you will consider the CUE's network like only one machine, in which the physical addresses are the local MAC. It is similar to the Fibre Channel's operation, but based in IEEE standards. The network addresses are related with the "machine" (local MAC) outside the network, following the Internet model: do you use the IP addresses in Internet? It can be done in multiple ways. Whit this solution, and using the HDLC control, it is possible to have a "real time" services with characteristics of circuit switching: minimum delay and bandwidth guaranteed.

The system described from the services point of view, in the paper published in the Spanish engineering Magazine Anales de Mecanica y Electricidad, pp. 48-54, January 2005. The English version is available on-line: Universal Ethernet Telecommunications Service (http://www.lmdata.es/uets-eng.pdf). After read the other papers, it looks like the system is oriented only to Telecoms Networks. In fact, it can be used also in multiprocessor systems, corporate networks and others described in this article. My proposal is not only for public services, remember that it is "Universal", it can be used to build multiprocessor systems replacing Fibre Channel, the premier technique for storage area networking (SAN), with Ethernet/LLC. I have teach various courses in SAN and Fibre Channel, and my proposal shares the same philosophy an operation procedures: "Fabric Routing", that has proved its ability to deliver a new level of reliability, availability, security and both scalable throughput!
  and capacity. It provides interconnect systems for multiple topologies that can scale today a total system bandwidth on the order of a terabit per second.


J Herrero
System Analyst
Ministerio de Medio Ambiente