Meeting Minutes of the IEEE P802.21 Broadcast Handovers Study Group

21-08-0176-01-0000

IEEE P802
Media Independent Handover Services

Meeting Minutes of the IEEE P802.21 Broadcast Handovers Study Group

Chair: Burak Simsek

Secretary: Juan Carlos Zuniga

River Terrace 1: Thursday EST, May 15th, 2008

v  Meeting called to order by Burak Simsek, Chair of IEEE 802.21 Broadcast Handovers Study Group Chair at 08:00AM

Ø  Meeting Agenda

§  Kick off speech from Burak Simsek

§  Presentation on PSI/SI Tables of DVB for handovers to DVB

§  Discussion on the expectations from the study group

Ø  Chair: Any comments or objections for the agenda?

§  No response from the floor.

v  Burak Simsek: There has been a tremendous support from nearly all the participants. Therefore many thanks to all of you. Initially the target was directly building a task group based on the recommendation of Vivek. Although this was possible, due to the need for synchronization with the DVB technical module and the extension of the initial topic, which was handovers with DVB, to handovers with broadcasting technologies we had to build the study group. A successful outcome is only then possible if you and your colleagues representing different broadcast technologies support us in the future.

v  Presentation on PSI/SI tables: Document: https://mentor.ieee.org/802.21/file/08/21-08-0147-00-0000-dvb-h-networks.ppt

v  Discussion:

Ø  Farrokh: is there always an uplink channel?

§  Burak: we will assume first that there is none, and second that there will be one. First one will give a generic look at the differences of broadcast technologies and the second one reflects the real implementations of DVB.

Ø  Farrokh: Is there a way to identify the user?

§  Burak: Basically, multicast/broadcast services cannot identify individual users. Therefore it is also not possible to talk to only one user directly using multicast addressing. Normally we would use IP addresses to identify a person or sometimes MAC addresses. This is not the same for broadcast technologies. Nevertheless, IPDatacast also makes communicating with individuals possible. Or we are dealing with all the receivers of a service. So IP represents a service instead of persons. Uplink address could be the one from the return channel

Ø  Junghoon: Is IP Multicast Leave an IGMP?

§  B: No

Ø  Farrokh: how do we determine the address of a stream?

§  Burak: Once the IP packet is encapsulated, the PID will become the destination address. PID “could” change when services are reconfigured.

Ø  Farrokh: I believe that we really need an uplink channel to perform handover.

Ø  Junghoon: Can MIH exist only in X Network and not in DVB network?

§  B: There should be no restriction in 802.21

Ø  Burak: Should we define a generic interface or not? (E.g. DVB, MediaFLO, DMB). Can we have contributions from MediaFLO and DMB?

§  Farrokh: We should first answer the question with DVB in mind: can we work with a FLO scenario (no return channel)?

§  Junghoon: Let’s define the scope in this group and leave the generic/specific interface for the TG phase

§  Les: We should do the same as we’ve done for non-broadcast technologies. Namely, a generic interface and afterwards link specifications…

§  The proposal of Les was acceptable also for the others.

§  Vivek: You can also prepare more than one PAR.

§  Burak: OK. Then this will be our approach in case needed.

Ø  Vivek: Did you arrange the person who will present the tutorial for DVB?

§  Burak: I will do it. We should talk on the details of the tutorial.

§  Farrokh: There should be some time reserved also for other technologies.

§  Burak: Then I will have to find someone other than Prof. Reimers (chair of DVB technical module). And if this is a person from DVB he won’t be willing to tell much on other technologies.

§  Junghoon, Farrokh, Les, Vivek, Juan Carlos: We can have from each technology one person. They can prepare slides using the structure of DVB slides.

§  Burak: OK. Then I have to be able to determine the slides. In case I am allowed to combine them in order to make sure that nothing is wrong with the tutorial, this is not a problem. Then we will prepare a generic broadcasting approach, afterwards mention about DVB, MediaFLO, DMB and MBMS… For each technology corresponding tutor will be responsible.

Attendance: