Re: [802.21] DVB Technical Module Meeting
Dear Stephen,
I would like to thank you for your questions regarding handovers with DVB.
I think such questions will really help us developing nice solutions to
the problem and hope your contribution throughout the lifetime of the
study group.
As Juan Carlos already mentioned, the consequences of unidirectional
links on .21 have been discussed within the group so far in several
meetings. In fact we had similar discussions here in DVB. There are
already some project results on this issue and we will be working on
those in order to choose the best solutions as candidates. Additionally,
some DVB participants showed interest to make contributions to 802.21
regarding unidirectional links, so we should get some interesting inputs
from them too.
best regards
Burak Simsek
Zuniga, Juan Carlos schrieb:
> Hello Stephen,
>
> I'm glad to see that you are interested in the topic :)
>
> It is true that the content would need to be there in the DVB network,
> but also keep in mind that 802.21 can provide information about whether
> the network and the service is available even before searching for the
> content.
>
> In fact, the return channel problem that you mention is one of the main
> topics we were discussing during the past Broadcast SG meeting in
> Jacksonville. One of the proposals was to assume that there will always
> be a return channel, as regardless of whether you are handing over to or
> from DVB, the other technology would have this return channel in place.
> We have not reached a conclusion yet, but this is definitely in the
> agenda for the next meetings.
>
> Regarding the terminology, I think that we can get to an agreement about
> the best way it should be called.
>
> It would be nice if you could participate in these discussions during
> the next meeting, if your agenda allows it of course.
>
> Best regards,
>
>
> Juan Carlos
>
>
>
> -----Original Message-----
> From: McCann, Stephen [mailto:stephen.mccann@ROKE.CO.UK]
> Sent: Thursday, 05 June, 2008 7:07 AM
> To: STDS-802-21@LISTSERV.IEEE.ORG
> Subject: Re: [802.21] DVB Technical Module Meeting
>
> Burak,
> I'm a little confused by the terminology here, when mentioning
> DVB-H for example.
>
> How exactly would you handover to DVB-H? If you have a session on
> a terminal (e.g. 3G) watching streaming video and then you 'handover'
> to DVB-H, using 802.21, don't you have to assume, that there just
> happens to be a DVB-H channel broadcasting the content that you want.
> How do you signal to the DVB-H transmission system the specific
> information
> that you want? I don't see how session control can be maintained
> for the reception of a broadcast medium.
>
> If you wished to handover to DVB-RCT, then I can understand how the
> return channel informs the DVB broadcast carosel that you are expecting
> specific content, as you handover. However without the return channel,
> handover doesn't appear to be the correct term.
>
> Perhaps 'multimode reception' would be a better term than handover in
> this case?
>
> Kind regards
>
> Stephen
>
>
>> -----Original Message-----
>> From: stds-802-21@LISTSERV.IEEE.ORG
>> [mailto:stds-802-21@LISTSERV.IEEE.ORG] On Behalf Of Burak Simsek
>> Sent: 05 June 2008 11:48
>> To: STDS-802-21@LISTSERV.IEEE.ORG
>> Subject: DVB Technical Module Meeting
>>
>> Dear all,
>>
>> Juan Carlos Zuniga and I joined the DVB Technical Module meeting.
>> As you all know we were given a time slot for introducing the
>> work of broadcast handovers study group.
>>
>> The 802.21 presentation by Juan Carlos Zuniga was very well
>> received by the DVB Technical Module people.
>>
>> There was a discussion after the presentation. To summarize:
>> The handover problem is relevant to all DVB technologies
>> (DVB-H/T/SH/T2/RCS,etc) and at the moment there are a lot of
>> discussions going on regarding IPTV, IMS services, content
>> uploading, etc., so 802.21 should be considered for all DVB
>> technologies...
>>
>> At the end there was strong support from the chair and 15
>> companies showed official interest. Prof. Reimers, the chair
>> of DVB- technical module, was also very happy with the
>> results. A Work Item and formal Liaison will be discussed in
>> the next DVB Technical Module meeting.
>>
>> best regards
>>
>> Burak Simsek
>>
>>