RE: Radio over Ethernet draft PAR for the IEEE 1904 pre-review & discussion
Raz,
Thank you for the review. Please, see my comments inline.
> -----Original Message-----
> From: Raz Gabe [mailto:Raz.Gabe@xxxxxxxx]
> Sent: Tuesday, October 07, 2014 1:13 PM
> To: AshwoodsmithPeter; Jouni Korhonen; Glen Kramer; 'STDS-1904-
> WG@xxxxxxxxxxxxxxxxx'
> Subject: RE: Radio over Ethernet draft PAR for the IEEE 1904 pre-review &
> discussion
>
> Hi,
> One more item that in paragraph 5.4.
> "This standard enables the transfer of IQ user-plane data, vendor specific data,
> and control and management (C&M) information channels across an Ethernet-
> based packet-switched network and fosters interoperability among
> implementations by defining framing, including headers for the encapsulated
> information, and common Ethernet Types. The unified encapsulation and header
> format allows for future development also on other transport technologies than
> Ethernet"
>
> If we will add the mapping in the work, we will need the detail how mapping is
> done (or not?). then we will need the "vendor specific data...."
> 1. Do you expect that 1904- WG will do the task?
[Jouni Korhonen]
Yes, since the vendor specific data is just a flow from a mapper point of view among other flows (IQ, C&M etc). We (or the mapper) has no interest what goes in it or what its internal structure is.
> About more information from other standard bodies:
> 1. I think that we need to liaison CPRI group about the work (or maybe get a
> liaison from them?)
[Jouni Korhonen]
It is already identified that we probably need to liaise with CPRI.. and a number of other SDOs as well. Basically to describe what we would be doing.
We would actually like to hear what CPRI is doing for their 7.x specs e.g. whether the basic/hyper frame format or line coding changes etc.
2. I think that ITU is doing also some work in that
> direction...can you clarify? Or we need to liaison them also?
[Jouni Korhonen]
I assume you refer to ETSI ORI work? Or the CPRI over OTN in SG15 years back?
> 3. As it handles items of RRH and other processes in 3GPP arena, should we
> liaison to them also?
[Jouni Korhonen]
I am not sure 3GPP has anything to say here or we have to say to them. That might change if the 3GPP actually goes into direction of defining something for the fronthaul transport.
- Jouni
>
> Rgrds
> --Raz
>
> -----Original Message-----
> From: stds-1904-wg@xxxxxxxx [mailto:stds-1904-wg@xxxxxxxx] On Behalf Of
> AshwoodsmithPeter
> Sent: Monday, October 06, 2014 11:09 PM
> To: Jouni Korhonen; Glen Kramer; 'STDS-1904-WG@xxxxxxxxxxxxxxxxx'
> Subject: RE: Radio over Ethernet draft PAR for the IEEE 1904 pre-review &
> discussion
>
> Glen,
>
> In general IP allows traffic to follow many paths between source and destination
> and CPRI will require more nailed up forwarding together with behavior to
> guarantee timing etc. at those hops. As a result native IP is more challenging.
> Source routing / SPRING or Pseudo wires over MPLS would however be good
> candidates. MPLS pseudo wires are of course already in use for backhaul
> networks as are MPLS-TP connections.
>
> Peter
>
>
> -----Original Message-----
> From: stds-1904-wg@xxxxxxxx [mailto:stds-1904-wg@xxxxxxxx] On Behalf Of
> Jouni Korhonen
> Sent: Monday, October 06, 2014 3:58 PM
> To: Glen Kramer; 'STDS-1904-WG@xxxxxxxxxxxxxxxxx'
> Subject: RE: Radio over Ethernet draft PAR for the IEEE 1904 pre-review &
> discussion
>
> Glen,
>
> Actually there is no reason why IP could not be used as a transport (see for
> example existing SaToP and TDMoIP work in IETF). However, we are already
> somewhat tight with the capacity for Ethernet and the fat IP+UDP header would
> not help there.
>
> Our intention is to work on this topic in pragmatic steps. Solve the Ethernet first,
> since it has a great promise e.g., in C-RAN. Once Ethernet is done, it is time to
> look for other transports that are likely to benefit from the Ethernet
> encapsulation being already there.. but that work is likely to be done in other
> SDO than IEEE.
>
> - Jouni
>
>
> > -----Original Message-----
> > From: Glen Kramer
> > Sent: Monday, October 06, 2014 10:42 PM
> > To: Jouni Korhonen; 'STDS-1904-WG@xxxxxxxxxxxxxxxxx'
> > Subject: RE: Radio over Ethernet draft PAR for the IEEE 1904
> > pre-review & discussion
> >
> > Jouni,
> >
> > Another question I was asked off reflector:
> >
> > "Why wouldn't this kind of traffic be carried over IP?"
> >
> > Can you clarify, please?
> >
> > Glen
> >
> >
> > > -----Original Message-----
> > > From: Jouni Korhonen
> > > Sent: Monday, October 06, 2014 11:57 AM
> > > To: Marek Hajduczenia; Glen Kramer; 'STDS-1904-WG@xxxxxxxxxxxxxxxxx'
> > > Subject: RE: Radio over Ethernet draft PAR for the IEEE 1904
> > > pre-review & discussion
> > >
> > > Marek,
> > >
> > > Thank you for reviewing the PAR. Comments pointing out ambiguity in
> > > the text are very important.
> > >
> > > It is not the intention to touch the Ethernet header, by adding
> > > /removing / changing existing fields. Since this seemed not to
> > > crystal clear we better clarify the PAR text on this. Could you
> > > point at which part of the text exactly gave you this impression?
> > >
> > > Headers the PAR mentions are what you refer as " a simple mapping of
> > > data received from RF interface into payload of an Ethernet frame".
> > >
> > > Thanks,
> > > Jouni
> > >
> > > > -----Original Message-----
> > > > From: stds-1904-wg@xxxxxxxx [mailto:stds-1904-wg@xxxxxxxx] On
> > > > Behalf
> > > Of
> > > > Marek Hajduczenia
> > > > Sent: Monday, October 06, 2014 9:36 PM
> > > > To: Glen Kramer; 'STDS-1904-WG@xxxxxxxxxxxxxxxxx'
> > > > Subject: RE: Radio over Ethernet draft PAR for the IEEE 1904
> > > > pre-review & discussion
> > > >
> > > > Glen, et al.,
> > > >
> > > > I do not have immediate issues with PAR, but it is not clear at
> > > > this time what
> > > the
> > > > scope of the work would be. PAR mentions "encapsulation of
> > > > digitized
> > > radio In-
> > > > phase Quadrature (IQ) pay-load and related control data into an
> > > > Ethernet
> > > packet
> > > > including the necessary encapsulation header within the
> > > > encapsulating
> > > Ethernet
> > > > frame", which to me reads like a simple mapping of data received
> > > > from RF interface into payload of an Ethernet frame.
> > > > However, in different locations PAR refers to Ethernet headers,
> > > > which
> > > might be
> > > > interpreted as implied changes to already defined Ethernet header,
> > > > by
> > > adding /
> > > > removing / changing existing fields. I am not sure whether that is
> > > > the intent
> > > of
> > > > the authors, but some more details on what they are trying to
> > > > achieve
> > > would be
> > > > welcome, perhaps in a form of a Power Point deck showing details
> > > > of
> > > needed
> > > > mapping and intended changes (if any) to Ethernet framing.
> > > >
> > > >
> > > > The only reason why I bring it up is that we (1904WG) do not
> > > > control
> > > Ethernet
> > > > frame structure, and while we can specify how data is mapped from
> > > > RF
> > > interface
> > > > into Ethernet payload, changing the structure of Ethernet headers
> > > > would
> > > imply
> > > > close cooperation with 802.3.
> > > >
> > > > Regards
> > > >
> > > > Marek
> > > >
> > > > -----Original Message-----
> > > > From: stds-1904-wg@xxxxxxxx [mailto:stds-1904-wg@xxxxxxxx] On
> > > > Behalf
> > > Of
> > > > Glen Kramer
> > > > Sent: Monday, October 6, 2014 2:16 PM
> > > > To: STDS-1904-WG@xxxxxxxxxxxxxxxxx
> > > > Subject: FW: Radio over Ethernet draft PAR for the IEEE 1904
> > > > pre-review & discussion
> > > >
> > > > Dear Colleagues,
> > > >
> > > > I have received the following request for Radio-over-Ethernet
> > > > (RoE)
> > > project to
> > > > be formed under 1904 WG. The draft PAR is attached.
> > > > We will vote on this PAR at the next meeting. Meanwhile, I
> > > > encourage
> > > everyone
> > > > to review and discuss the draft PAR on the reflector. Feel free to
> > > > contact
> > > PAR
> > > > authors with any questions, or if you want your name to be added
> > > > as a supporter.
> > > >
> > > > If approved, this PAR will become 1904.3 project.
> > > >
> > > > Thank you,
> > > > Glen
> > > >
> > > > -----Original Message-----
> > > > From: Jouni Korhonen
> > > > Sent: Monday, October 06, 2014 12:00 AM
> > > > To: Glen Kramer
> > > > Cc: Zongying He; Jay (James) Teborek; duanran@xxxxxxxxxxxxxxx;
> > > > cuichunfeng@xxxxxxxxxxxxxxx; liu.qiong@xxxxxxxxxx;
> > > > Patrice.Plante@xxxxxxxxxx; zhang.boshan@xxxxxxxxxx;
> > > > satoru.matsushima@xxxxxxxxxxxxxxxx; tero.mustala@xxxxxxx;
> > > > huangjinri@xxxxxxxxxxxxxxx; Peter.AshwoodSmith@xxxxxxxxxx
> > > > Subject: Radio over Ethernet draft PAR for the IEEE 1904
> > > > pre-review &
> > > discussion
> > > >
> > > > Dear chair of the IEEE 1904 ANWG,
> > > >
> > > > Please see the attached draft version of the PAR for Radio over
> > > > Ethernet
> > > > (RoE) standardization effort that we (the individuals in the CC
> > > > list) seek to
> > > pursue
> > > > under the IEEE 1904 ANWG. We welcome a review and comments from
> > > > 1904 members on the current draft version of the PAR. We intend to
> > > present this
> > > > PAR in the forthcoming 1904 meeting in Wuhan to drive our cause,
> > > > which
> > > means
> > > > we also ask for a presentation slot in the forthcoming 1904
> > > > meeting
> > > agenda.
> > > >
> > > > Should there be any additional backup material prior the meeting,
> > > > please
> > > let us
> > > > know. If there are any other matters we should be aware of just
> > > > let us
> > > know.
> > > >
> > > > Best regards,
> > > > Jouni (on behalf of the PAR preparation team)
> > > >
> > > >
> > > > --
> > > > Jouni Korhonen
> > > > CTO Office, Networking
> > > > Broadcom