Sterling Perrin 6/21/2018 | 4:55:53 PM
Regional Differences Thanks Ray.

I'm also very interested in undertsanding regional differences in how operators are planning for 5G transport. Verizon, for example, makes a strong case for C-RAN and NG-PON2. But are European operators interested in the same? Some of the early data we are getting indicates a wide range of preferences in architectures and technologies for 5G. But the services/applications story doesn't seem so varied by operators and region. If applications goals are similar, what drives the technology choice differences we are starting to see? Hopefully, we'll all get some insights next week!



petercf 6/21/2018 | 6:38:18 PM
Microwave has lower latency than fibre Optical or microwave in 5G access/aggregation networks? Optics is the go-to option to deliver the bandwidth and latency needed for 5G - but microwave offers lower latency than fibre?
Sterling Perrin 6/25/2018 | 3:01:47 PM
Re: Microwave has lower latency than fibre I have not heard the argument yet that microwave latency is lower than fiber. Almost all of the discussion has been around 1. arguing that microwave is reliable enoough and 2. microwave can provide the needed BW.

Is microwave exceeding the speed of light??
Duh! 6/25/2018 | 3:35:33 PM
Re: Microwave has lower latency than fibre The speed of light in free space is greater than the speed of light in glass. For G.652 fiber, it is 204,331,835 m/s versus 299,792,458 m/s in a vacuum. The difference between air and vacuum is negligible. I understand that point-to-point microwave links from Chicago to New York have been built for the traders.
petercf 6/25/2018 | 4:31:26 PM
Re: Regional Differences Sterling,


You are right and the discussions are centering around a set of characteristics that are not only country dependent by also operator dependent.

E.g. do you deploy C-RAn with 24Gbps dark fibre with gNode base station hotels or small cells. Do you deploy small cells or mid-band macro's with MIMO or perhaps just 8T/8R - that's a spectral efficiency play.

Finally there are a lot of challenges with cell sites and getting extra antenna on them cost effecttively.
brooks7 6/25/2018 | 4:57:54 PM
Re: Microwave has lower latency than fibre This does make a couple of assumptions:


1 - That only signal amplifiers are required and not actual layer 2 or higher retransmission.

2 - That the modulation schemes have the same group delay or encoding delay and that these don't actually dominate the transmission delay.


momar68 6/27/2018 | 11:34:11 AM
T-SDN real challenges and business cases! While extending the SDN to transport layer is interesting conceptually. It impose significant challenges to vendors and operators while at the same time create some potentials.

Seems to me it is just a buzz word these days to be in the news and show innovation by optical vendors rather than a real monetized used case.

kq4ym 7/9/2018 | 8:23:02 AM
Re: Regional Differences The many variables for delivery will make for some interesting guesses and choices down the road, not the least as mentioned will be the antenna siting and maintenance issues for small cells and how government zoning or regulations may affect where they go and how effective they might turn out using higher frequencies with inherent shorter radio transmission distances.
RituGupta 10/17/2018 | 9:39:17 PM
Re: Regional Differences in 5G technology, I really think that things are getting a little bit out of hand. I mean, I can understand that it's important to work on what infrastructure we have if we want to be competitive, and the more efficient the communication channels are, the better it is for the economy to improve. The problem lies with adapting the new framework - isn't there a lot of changes in the infrastructure to begin with before we can start enjoying the rewards of the new system?