Fiber project/IPTV multicast
Do any of the people who've worked with some of the IPTV delivery services mentioned here know if their live TV services can be handled via Multicast? Off-list replies are fine; will summarize if anyone else cares. Cheers, -- jra -- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274
On 13-02-09 14:02, Jay Ashworth wrote:
Do any of the people who've worked with some of the IPTV delivery services mentioned here know if their live TV services can be handled via Multicast?
I know that Bell Canada uses the Microsoft MediaRoom IPTV servers and they support multicast. The delivery network is somewhat separate from the data network. At the DSLAM, they travel as separate VLANs to the customer. Bell Canada hasn't provided technical answers to exactly where IPTV and data start to share transmission facilities (from a tariff point of view, they do not wish to admit that both share trunk lines to COs). You may also wish to look at the Australian NBN. http://www.nbnco.com.au/multicast Somewhere on their web site, they have the specs of the L2 service with regards to voice and data. Recently, they announced a trial for multicast IPTV retailer over the wholesale NBN.
Nearly all IPTV is multicast via group joins. That is how they limit access to content. It is all technically live (save for vod) as it is down linked from a source and fed into the head end. A lot of cable providers do multi cast over coax now as well. Check out cable labs if you haven't, they have some neat stuff they discuss.
From my Android phone on T-Mobile. The first nationwide 4G network.
-------- Original message -------- From: Jean-Francois Mezei <jfmezei_nanog@vaxination.ca> Date: 02/09/2013 11:19 AM (GMT-08:00) To: nanog@nanog.org Subject: Re: Fiber project/IPTV multicast On 13-02-09 14:02, Jay Ashworth wrote:
Do any of the people who've worked with some of the IPTV delivery services mentioned here know if their live TV services can be handled via Multicast?
I know that Bell Canada uses the Microsoft MediaRoom IPTV servers and they support multicast. The delivery network is somewhat separate from the data network. At the DSLAM, they travel as separate VLANs to the customer. Bell Canada hasn't provided technical answers to exactly where IPTV and data start to share transmission facilities (from a tariff point of view, they do not wish to admit that both share trunk lines to COs). You may also wish to look at the Australian NBN. http://www.nbnco.com.au/multicast Somewhere on their web site, they have the specs of the L2 service with regards to voice and data. Recently, they announced a trial for multicast IPTV retailer over the wholesale NBN.
However you get your video feed you can encode it as ip and feed it out to your shelves as IGMP streams. This is the "normal" way to handle linear programming. On Feb 9, 2013 2:03 PM, "Jay Ashworth" <jra@baylink.com> wrote:
Do any of the people who've worked with some of the IPTV delivery services mentioned here know if their live TV services can be handled via Multicast?
Off-list replies are fine; will summarize if anyone else cares.
Cheers, -- jra
-- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274
More accurately you'll do MPEG 4 streams controlled by IGMP. On Feb 9, 2013 3:55 PM, "Scott Helms" <khelms@zcorum.com> wrote:
However you get your video feed you can encode it as ip and feed it out to your shelves as IGMP streams. This is the "normal" way to handle linear programming. On Feb 9, 2013 2:03 PM, "Jay Ashworth" <jra@baylink.com> wrote:
Do any of the people who've worked with some of the IPTV delivery services mentioned here know if their live TV services can be handled via Multicast?
Off-list replies are fine; will summarize if anyone else cares.
Cheers, -- jra
-- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274
Yes. Most live IPTV is delivered across multicast*. There are a few gotchas. MMR uses a unicast fill for instant channel change (configurable bandwidth ammounts, etc) on top of Multicast. Some other middleware may have similar methods to accomplish this. Usually at the DSLAM you'll see "hax" to forward IGMP requests and multicast ingress to/from a specific VLAN. Most EFM based DSLAMs will segregate this all the way down to the CPE, and let the CPE handle differentiating the joins on the particular VLANs. Sometimes it's handled inside the DSLAM, but usually it's all configurable. Handling live TV unicast is definitely possible but brings up another set of challenges across the SP network towards the DSLAM/Agg point. Mainly reproduction of the same content * subscriber count, so your bandwidth towards a given DSLAM/Agg point grows with every subscriber. Low penetration count of IPTV, this can be less bandwidth, as IPTV penetration grows this could be several times the multicast bandwidth. Usually most channel lineups are 1gbps->2.5gbps of multicast bandwidth, depending on channel bitrates, amount of content, etc, etc.. MMR == Microsoft Mediaroom -- Tim On Sat, Feb 9, 2013 at 1:02 PM, Jay Ashworth <jra@baylink.com> wrote:
Do any of the people who've worked with some of the IPTV delivery services mentioned here know if their live TV services can be handled via Multicast?
Off-list replies are fine; will summarize if anyone else cares.
Cheers, -- jra
-- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274
On 13-02-09 14:02, Jay Ashworth wrote:
Do any of the people who've worked with some of the IPTV delivery services mentioned here know if their live TV services can be handled via Multicast?
Note that in Canada, because incumbents refuse access to their multicast enabled infrastructure, some of the newer (small) IPTV providers use unicast via the GAS/TPIA networks to deliver to individual customers. Obviously, they do not get bandwidth savings when many customers watch the same program, but they are at least able to offer some TV service which allows them to bundle Internet and TV instead of forcing their internet customers to subscribe to the cable service. Bell Canada (telco) does not allow indie ISPs to resell Bell Canada's IPTV service, nor does Bell canada accept to sell it to end users who are not subscribed to ell Canada's own internet service. So for folks on DSL based indie ISPs, , because the telco refuses to sell them IPTV services, the indie smaller IPTV providers provide an alternative. Note that in Canada, there are geographical restrictions to "BDU" (broadcast distribution undertaking). So an IPTV provider who is alower to distributre only in a certan region of Ontario for instance will to geolocate the subscriber before allowing access to the TV data. This geolocation is done by a transaction with the ISP to confirm the address/city of the subscriber falls within the allowed serving area. So the IPTV supplier needs to setup with each ISP to allow for this to happen (and sign contracts, billing etc etc). OTT providers who obtain "network" distribution risght are not regulated. But Broadcast distribution are highly regulated in Canada.
participants (5)
-
Jay Ashworth -
Jean-Francois Mezei -
Scott Helms -
Tim Jackson -
Warren Bailey